www.zhongpindianlu.net1440针对中频电炉的节能措施http://www.zhongpindianlu.net/news/783.htm现代工业生产过程中,中频感应炉和中频电炉因其投资少、见效快、操作方便等优点,被广泛运用。但是中频感应炉和中频电炉生产节能问题一直困扰着大多数厂家。下面我们从中频感应炉和中频电炉的生产特点及多年生产实践经验,从提高生产效率、提高熔化速度、减少熔炼时间几..现代工业生产过程中,中频感应炉和中频电炉因其投资少、见效快、操作方便等优点,被广泛运用。但是中频感应炉和中频电炉生产节能问题一直困扰着大多数厂家。下面我们从中频感应炉和中频电炉的生产特点及多年生产实践经验,从提高生产效率、提高熔化速度、减少熔炼时间几方面入手,总结出了中频炉感应炉和中频电炉生产的节电的途径。In the process of modern industrial production, the intermediate frequency induction furnace and the intermediate frequency furnace are widely used because of their advantages such as little investment, quick operation and convenient operation. However, the energy saving problem of medium frequency induction furnace and medium frequency electric furnace has been perplexed most manufacturers. Below we from the characteristics of medium frequency induction furnace and intermediate frequency electric furnace production and many years of experience in production practice, from improving the efficiency of production, improve the melting speed, reduce the melting time several aspects, summarizes the intermediate frequency furnace and medium frequency induction furnace furnace production of electricity saving way. 首先应该延长连续冶炼时间,这样能提高生产的效率;其次要合理配料,这样提高了熔炼的准确度;然后是合理的冶炼操作,其中要注意生产的安全性;然后是合理控制出钢温度,可以保证生产的质量不出问题;最后是要保持设备完好,出现故障及时维修,对设备要定时进行维修和保养。Firstly, continuous smelting time should be extended to improve the efficiency of production. Secondly, the rational ingredient should be used to improve the accuracy of smelting. Then reasonable smelting operation, which should pay attention to the safety of production; Then it is reasonable to control the steel temperature to ensure the production quality is not a problem; In the end, the equipment should be kept in good condition, the equipment should be repaired in time, and the equipment should be repaired and maintained regularly. 通过合理安排生产、合理配料炉,冶炼作业以及合理控制出钢液温度,都可以缩短熔炼时间,以每炉次平均冶炼时间80min~90min计,每缩短1min的冶炼时间,就可节约1%的电能。炉衬的质量和冶炼设备完好是安全生产、提高生产效率和节能降耗的基础。必须科学管理,采取综合措施并切实加以落实,提高生产效率,提高熔化速度,减少熔炼时间,从而达到节约电能的目的Through the reasonable arrangement of the production, the reasonable ingredients furnace, smelting operation and reasonable control of liquid steel temperature, can shorten the melting time, per 80 min min to 90 per furnace smelting time, 1 min per shorten smelting time, can save 1% of its electricity. The quality of lining and smelting equipment are the basis of safe production, production efficiency and energy saving. It must be scientific management, take comprehensive measures and implement them effectively, improve production efficiency, improve the melting speed and reduce the melting time, thus achieving the purpose of saving electricity新闻中心aywl2017-08-12 09:54中频炉原理及用途http://www.zhongpindianlu.net/news/784.htm原理:晶闸管中频感应加热电源是利用晶闸管将三相工频交流电能变换成几百或几千赫兹的单相交流电能。中频电源的工作原理为:采用三相桥式全控整流电路将交流电整流为直流电,经电抗器平波后,成为一个恒定的直流电流源,再经单相逆变桥,把直流电流逆变成一定频率(一般..原理:晶闸管中频感应加热电源是利用晶闸管将三相工频交流电能变换成几百或几千赫兹的单相交流电能。中频电源的工作原理为:采用三相桥式全控整流电路将交流电整流为直流电,经电抗器平波后,成为一个恒定的直流电流源,再经单相逆变桥,把直流电流逆变成一定频率(一般为1000至8000Hz)的单相中频电流。负载由感应线圈和补偿电容器组成,连接成并联谐振电路。Principle: Thyristor Medium frequency induction heating power is the use of thyristor three-phase three-phase AC power can be converted into several hundred or several thousand Hertz single-phase AC power. The working principle of medium frequency power supply is used for three-phase full bridge controlled rectifier circuit for rectifying the alternating current direct current, the flat wave reactor, a direct current source is a constant, then the single-phase inverter bridge, the inverter DC current into a certain frequency (typically 1000 to 8000Hz) of the single-phase medium frequency current. The load is composed of an induction coil and a compensating capacitor, and is connected into a parallel resonant circuit.用途:广泛用于铸钢、不锈钢或合金钢的冶炼、真空冶炼、锻件的加热和钢管的弯曲、挤压成型、工件的预热、钢件表面淬火、退火热处理、金属零件的焊接、粉末冶金、输送高温工质的管道加热、晶体的生长等不同场合。在我厂,中频电源适用于钢铁、铜、铝、锌、镍、金银等金材料的熔炼和锻压、热轧、弯管成型前的透热处理。主要用于铸造熔炼行业;具有控制方便、效率高、运行可靠、劳动强度低的特点;Application: widely used in steel, stainless steel or alloy steel smelting, vacuum smelting, forging and heating pipe bending, extrusion molding, preheating of workpiece, the surface of steel quenching, annealing, metal parts welding, powder metallurgy, conveying high temperature refrigerant pipe heating, crystal growth on different occasions. In our factory, heating treatment of intermediate frequency power supply for steel, copper, aluminum, zinc, nickel, gold and silver and other metal materials smelting and forging, hot rolling, bending and molding before. Mainly used in foundry and smelting industry. It has the characteristics of convenient control, high efficiency, reliable operation and low labor intensity;新闻中心aoutmy2017-08-01 09:12中频电炉保养要点http://www.zhongpindianlu.net/news/781.htm1、定期清除电源柜内积尘1. Remove dust from the power cabinet regularly 尤其是可控硅管芯外部,要用酒精擦除干净。运行中的变频装置一般都有专用机房,但实际作业环境并不理想在熔炼锻压工序,粉尘很大震动强烈。在透热淬火工序,装置厂靠近酸洗磷化等作业设备,有较..1、定期清除电源柜内积尘1. Remove dust from the power cabinet regularly 尤其是可控硅管芯外部,要用酒精擦除干净。运行中的变频装置一般都有专用机房,但实际作业环境并不理想在熔炼锻压工序,粉尘很大震动强烈。在透热淬火工序,装置厂靠近酸洗磷化等作业设备,有较多腐蚀性气体,这些都会对中频电炉相关装置的元件起到破坏作用,降低装置的绝缘强度在积尘较多时,往往会发生元件表面放电现象,因此必须注意经常清洗工作,防止故障发生;In particular, the silicon controlled silicon tube core should be cleaned with alcohol. The frequency conversion device in operation usually has a special machine room, but the actual working environment is not ideal in the smelting and forging process, and the dust is very strong. In heating quenching process, the device factory near the work equipment, such as pickling phosphating more corrosive gas, these will be for the intermediate frequency electric furnace related device components damage effect, decreases the insulation strength of the device are too many in the dust, the components surface discharge phenomenon can occur, so must pay attention to often clean work, prevent failure; 2、定期检查水管接头扎结是否牢靠Check the connection of the water pipe regularly 使用自来水井水作为中频电炉装置的冷却水源时,易积存水垢,影响冷却效果。在塑料水管老化产生裂纹时,应及时更换装置。在夏天运行时采用自来水井冷却往往容易发生凝露现象,应该考虑使用循环水系统,凝露严重时应该立即停止运行;When water well water is used as the cooling water source of medium frequency furnace, it can deposit scale and influence the cooling effect. When the plastic water pipe age cracks, should replace the device in time. In the summer, when the water is used to cool the water, it is easy to get the condensation phenomenon. The circulating water system should be considered, and the operation should be stopped immediately when the condensation is serious. 3、定期更换或清洗中频电炉相关设备的关键部件3. Regularly replace or clean the key parts of the equipment in the intermediate frequency furnace 4、定期对装置进行检修4. Check the equipment regularly 对装置各部件的螺栓和紧固接触器继电器的触头要进行定期检查,若出现松动或接触不良现象,均应及时修理更换,不能勉强使用,防止引起重大事故。Every parts of device bolt fastening contactor and relay contactor to conduct regular inspection, if appear, loosening or poor contact, shall be promptly repaired change, can not be forced to use, to prevent major accidents.新闻中心aywl2017-07-20 07:03中频电炉常见故障及处理http://www.zhongpindianlu.net/news/780.htm1、开机,设备不能正常起动1. Starting up, the equipment cant start properly 故障现象:起动时直流电流大,直流电压和中频电压低,设备声音沉闷。Fault phenomenon: the dc current is large when starting, the dc voltage and the intermediate frequency are low..1、开机,设备不能正常起动1. Starting up, the equipment cant start properly 故障现象:起动时直流电流大,直流电压和中频电压低,设备声音沉闷。Fault phenomenon: the dc current is large when starting, the dc voltage and the intermediate frequency are low, and the equipment is dull. 分析处理:逆变桥有一桥臂的晶闸管可能短路或开路,造成逆变桥三臂桥运行。用示波器分别观察逆变桥的四个桥臂上的晶闸管管压降波形,若有一桥臂上的晶闸管的管压降波形为一线,该晶闸管已穿通;若为正弦波,该晶闸管未导通。更换已穿晶闸管;查找晶闸管未导通的原因。Analytical processing: a bridge with a bridge arm can short-circuit or open, causing the reverse bridge to operate. The waveform of the thyristor on the four bridge arm of the inverter bridge is observed with the oscilloscope, and the thyristor has been perforated if the tube pressure drop of the thyristor on a bridge arm is the first line. If it is a sine wave, the thyristor does not. Replace the worn thyristor; Find out why the thyristor is unconnected. 2、设备能起动,但工作状态不对2. The equipment can start, but the working condition is not correct 故障现象:设备能正常顺利起动,当功率升到某一值时,过压或过流保护。Failure phenomenon: the equipment can start smoothly, and when the power reaches a certain value, overpressure or overcurrent protection. 分析处理:分两步查找故障原因:Analysis and processing: two steps for troubleshooting: 1)、先将设备空载运行,观察电压能否升到额定值。若电压不能升到额定值,并且多次在电压某一值附近过流保护。这可能是补偿电容或晶闸管压不够造成的,但也不排除是电路某部分打火造成的;1) first, the equipment is empty, and the voltage can be raised to the rating. If the voltage cannot be raised to the rating, it will be protected at a voltage value several times. This may be caused by insufficient pressure on the capacitance or thyristor, but it is not ruled out that a part of the circuit is caused by fire. 2)、若电压能升到额定值,可将设备转入重载运行,观察电流值是否能达到额定值,若电流不能升到额定值,并且多次在电流某一值附近过流保护,这可能是大电流干扰。要特别注意中频大电流的电磁场对控制部分和信号线的干扰。2), if the voltage can rise to the ratings, but putting the equipment into overload operation, observe whether the current value can reach rating, if cant rise to the current ratings, and near the current a value many times over-current protection, this may be a large current interference. Special attention should be paid to the interference of the electrical and magnetic field of the medium frequency current to the control section and the signal line. 3、设备正常运行时,易出现的故障When the equipment is running properly, it is liable to fail 故障现象:设备运行正常,但在正常过流保护动作时,烧毁多支KP晶闸管和快熔。Malfunction: the equipment is running normally, but in normal flow protection action, burn more KP thyristor and quick melting. 分析处理:过流保护时,为了向电网释放平波电抗器的能量,整流桥由整流状态转到逆变状态,这时如果а>1500就有可能造成有源逆变颠覆,烧毁多支晶闸管和快熔,开关跳闸,并伴随有巨大的电流短路爆炸声。对变压器产生较大的电流和电磁力冲击,严重时会损坏变压器。Analysis: over-current protection, in order to to the grid flat wave reactor of energy released, rectifier bridge rectifier state to the inverter state, at this moment if а > 1500 is likely to cause active inverter, burning more than thyristor and the fast fuse, switch trip, and is accompanied by huge short-circuit current explosion. The transformer can be damaged by a large current and electromagnetic force.新闻中心aywl2017-07-07 09:17感应中频电炉熔炼特点http://www.zhongpindianlu.net/news/779.htm根据感应原理,感应电炉的感应线圈和坩埚中的金属液是两个同心异体。感应线圈相当于一次绕组,金属液是二次绕组。感应线圈中的电流和金属液中的感应电流,两者的方向在某一瞬间是相反的。因此感应线圈和金属液间将产生两个相互排斥的电磁力。在电磁力的作用下,金域液由..根据感应原理,感应电炉的感应线圈和坩埚中的金属液是两个同心异体。感应线圈相当于一次绕组,金属液是二次绕组。感应线圈中的电流和金属液中的感应电流,两者的方向在某一瞬间是相反的。因此感应线圈和金属液间将产生两个相互排斥的电磁力。在电磁力的作用下,金域液由坩埚四周被推向中心。产生“超肤效应”(集肤效应)和电磁搅拌。According to the induction principle, the inductor coil of induction furnace and the metal liquid in the crucible are two concentric bodies. The induction coil is equivalent to one winding and the metal liquid is secondary winding. The current in the induction coil and the induction current in the metal liquid are reversed in one moment. So the induction coil and the metal liquid will produce two electromagnetic forces that repel each other. Under the action of electromagnetism, the gold domain fluid is pushed to the center around the crucible. It produces "skin effect" (skin effect) and electromagnetic stirring. (1)超肤效应:感应电炉的感应圈在金属内部产生的磁通分布是不均匀的,越靠近坩埚壁磁通密度越大,而在坩埚中心磁通密度越小。: (1) the skin effect of induction furnace inside the metal induction coil, the magnetic flux distribution is uneven, moving closer to the magnetic flux density, the greater the crucible wall and the smaller the magnetic flux density in the center of the crucible. (2)电磁搅拌现象:由于电磁力作用下,使得坩埚中心部分的钢液上升,中心部分钢液上升必然引起边缘部分钢液下落。如此循环促使钢液不停运动起到电磁搅拌作用,有利于金属液的化学成分和温度均匀以及非金属夹杂物、气体上浮。不利方面是引起的“驼峰”现象将炉渣流向坩埚四周,坩埚中心金属液暴露于空气中易吸气和氧化。(2) electromagnetic stirring phenomenon: due to the effect of electromagnetic force, the steel fluid in the central part of the crucible rises, and the rising of the steel liquid in the center inevitably causes the falling of the steel fluid in the edge part. This cycle promotes the continuous movement of the molten steel, which ACTS as an electromagnetic stirring, which is beneficial to the chemical composition and temperature of the metal liquid, as well as the non-metallic inclusions and gas floats. The disadvantage is that the "hump" phenomenon causes the slag to flow to the crucible, and the metal liquid in the center of the crucible is exposed to air and is easy to inhale and oxidize. 围绕上述情况,根据流体力学理论和金属液、气体、夹杂物的密度关系,确立了熔炼过程中气体、夹杂物分布与处于的方位。Based on the above situation, the distribution and orientation of gas and inclusions in the smelting process are established according to the relation between the fluid mechanics theory and the density of metal liquid, gas and inclusions.新闻中心aywl2017-06-26 08:28炉衬寿命的判断方法http://www.zhongpindianlu.net/news/778.htm总结炉衬寿命的判断方法如下:The method of judging lining life is as follows: (1)根据以往经验推算炉衬寿命,在炉衬寿命快到时注意观察电炉频率表、电压表、电流表等,如果这些表的表针在正常工作情况下不断摆动,本次工作结束后炉衬寿命将尽不要再继续使用。..总结炉衬寿命的判断方法如下:The method of judging lining life is as follows: (1)根据以往经验推算炉衬寿命,在炉衬寿命快到时注意观察电炉频率表、电压表、电流表等,如果这些表的表针在正常工作情况下不断摆动,本次工作结束后炉衬寿命将尽不要再继续使用。(1) calculate lining life based on past experience, in pay attention to the electric furnace lining life faster when frequency table, voltmeter and ammeter, if these tables whose hands under normal working condition of oscillation, the lining life after work will try not to continue to use. (2)操作工用铁棍正常扒渣接触铁液有触电感时,注意观察电炉工作声音,如果声音 “发闷”甚至出铁液时声音变化明显,说明铁液已侵入炉衬甚至击穿炉衬,应根据情况处理炉内铁液并不再继续使用。(2) operator with iron contact normal grilled slag iron liquid has the feeling of electric shock, observe furnace work, if the sound "fullness" and even change the voice obvious at the time of the liquid iron, that iron has invaded the breakdown lining, lining and even in the treatment of molten iron in furnace as the case may be and does not continue to use. (3)电路工作声音明显变“闷”,电路外壳与其他接地体接触电源便停止工作时,说明铁液已击穿炉衬,应马上切断电源倒出炉内铁液,停止继续使用。(3) the circuit work voice became "boring", contact power supply circuit shell and other grounding system will stop working when the liquid iron has breakdown lining, should immediately cut off power supply of molten iron in pour out, stop to continue to use.新闻中心aywl2017-06-07 09:09中频电炉逆变桥晶闸管烧损故障排除方法http://www.zhongpindianlu.net/news/777.htm新闻中心aywl2017-05-24 02:29中频电源冷却系统故障的防范措施http://www.zhongpindianlu.net/news/776.htm新闻中心aywl2017-05-20 08:17离线清灰气箱式脉冲袋除尘器http://www.zhongpindianlu.net/news/774.htm10 t chosen is offline type LCM series intermediate frequency electric furnace filter soot cleaning air box pulse bag filter, the filter from the fule company has introduced advanced level in the eighty s high efficiency dust collector. To an integra..10 t chosen is offline type LCM series intermediate frequency electric furnace filter soot cleaning air box pulse bag filter, the filter from the fule company has introduced advanced level in the eighty s high efficiency dust collector. To an integrated chamber blow and injection pulse soot cleaning all kinds of bag filter, the advantages of overcoming the chamber blow soot cleaning strength is insufficient, injection pulse ash removal and filtering simultaneously, thus expanding the application range of bag filter, because the structure has the characteristics of this type of filter, so improving the dust collecting efficiency, prolong the service life of filter bag. 本系列产品广泛用于冶金、化工、机械、水泥和民用锅炉等废气的收尘系统。除尘器由壳体、灰斗、排灰装置、支架和脉冲清灰系统等部分所组成。当含尘气体从进风口进入除尘器后,首先碰到进出风口中间的斜隔板,气流便转向流入灰斗,同时气流速度变慢,由于惯性作用,使气体中粗颗粒粉尘直接落入灰斗,起到预收尘的作用。进入灰斗的气流随后折而向上通过内部装有金属骨架的滤袋,粉尘被捕集在滤袋的外表面,净化后的气体进入滤袋上部的清洁室,汇集到出风管排出。LCM型除尘器的进风口设在灰斗上。气流进入灰斗后首先碰上进风管端部的挡板,其作用与上述原理相同。壳体用隔板分成若干个独立的收尘室,按照给定的时间间隔对每个收尘室轮流进行清灰。每个收尘室装有一个提升阀,清灰时提升阀关闭,切断通过该收尘室的过滤气流,随即脉冲阀开启,向滤袋内喷入高压空气,以清除滤袋外表面上的粉尘。各收尘室的脉冲喷冲吹宽度和清灰周期,由专用的清灰程序控制器自动连续进行。This series is widely used in the dust collection system of metallurgy, chemical, mechanical, cement and civil boiler. The dust collector consists of the shell, the dust bucket, the ash device, the scaffold and the pulsed grey system. After the dust from the air inlet gas into the dust catcher, first met through the inclined plate, the middle of the outlet air turned into the ash bucket, airflow speed slower at the same time, due to inertia effect, coarse particles of dust in the gas directly into the hopper, have the effect of dust in advance. The airflow into the ash hopper then fold and upward through internal equipped with metal frame filter bag, dust was set on the outer surface of the filter bag, after purification, the gas into the upper part of the filter bag cleaning chamber, packed into the duct drainage. The inlet of the LCM filter is in the dust bowl. The air flow enters the dust bowl and first meets the fender of the wind tube, which is the same as the above principle. The shell is divided into several separate dust Chambers, which take turns in each collection room at a given interval. Each dust collecting chamber is equipped with a lift valve, lift valve closed when ash removal, cut through the dust collecting chamber of filtering flow, and pulse valve open, the air injection pressure inside the filter pocket, to remove dust on the surface of the filter bag appearance. The pulse blast width and gray cycle of each dust chamber are automatically carried out automatically by the special grey program controller.新闻中心aywl2017-05-16 09:14中频电炉逆变器的电力半导体功率器件模块智能化http://www.zhongpindianlu.net/news/772.htm中频电炉智能化是中频电源的发展趋势,也是衡量中频电炉电源 性能先进性的重要标志;同时中频电炉电源智能化也是提高加热处理自动化程度和电源可靠性的要求,使电源趋向集成化、模块化,对缩短生产周期,提高可使用性和可维修性均有重要意义。The intelligence of mediu..中频电炉智能化是中频电源的发展趋势,也是衡量中频电炉电源 性能先进性的重要标志;同时中频电炉电源智能化也是提高加热处理自动化程度和电源可靠性的要求,使电源趋向集成化、模块化,对缩短生产周期,提高可使用性和可维修性均有重要意义。The intelligence of medium frequency electric furnace is the development trend of medium frequency power supply, and it is also an important symbol of the advanced nature of the power supply of medium frequency electric furnace. And intermediate frequency electric furnace intelligent power supply is also increasing the degree of automation and power supply reliability requirements, make power toward integration, modularity, to shorten the production cycle, improve the reusability and maintainability are of great significance. 中频电炉电源实现智能化,应着重解决以下问题。The power supply of medium frequency furnace is intelligent, and the following problem should be addressed emphatically. (1)选用智能半导体模块是实现智能化的基础。构成中频电炉逆变器的电力半导体功率器件模块智能化,是加热电源智能化的基础。为此应选用集驱动控制、保护、智能于一体的智能模块,这些低电感、多功能、高集成的电力半导体模块,不仅减小了体积、质量,提高了逆变器在高频工作下的效率和可靠性,而且为采用微处理接口,实现智能化控制奠定了基础。(1) the use of intelligent semiconductor modules is the foundation of intelligentization. The power semiconductor power device module, which is composed of medium frequency electric furnace inverter, is intelligent and is the basis of the intelligent power supply. Should be chosen for this collection drive control, protection, intelligent in a bodys intelligent modules, these low inductance, multi-function, high integration of power semiconductor module, not only reduces the volume and quality, improve the efficiency and reliability of the inverter under high frequency work, and for the microprocessor interface, which laid a foundation to realize intelligent control. (2)运用数字处理技术是实现智能化的核心。中频电炉电源的控制技术是否先进合理,是决定加热电源智能化程度的关键。早期中频电炉电源的控制电路采用模拟电路,难以实现智能化,而且模拟电路受温度影响和抗干扰性差,导致参数不稳定和可靠性变差。运用单片机控制,使中频电炉电源向智能化方向迈进了一大步。现在应用数字信号处理器(DSP),信息容量更大,处理能力更强、更灵活,整个控制电路可用一片DSP完成,实现自动化智能控制。(2) using digital processing technology is the core of realizing intelligence. The control technology of medium frequency furnace power supply is advanced and reasonable, which is the key to determine the intelligent degree of heating power. Early of intermediate frequency electric furnace power supply control circuit adopts analog circuit, it is difficult to realize the intelligent, and analog circuits are influenced by temperature and poor anti-interference and deterioration in unstable parameters, and reliability. With the control of single chip microcomputer, a big step is made in the direction of the intelligent direction of medium frequency furnace power supply. Application of digital signal processor (DSP) now, information capacity is bigger, processing ability is stronger, more flexible, the control circuit can be used a piece of DSP, complete intelligent automation control. 采用以DSP为核心的控制芯片,可以使中频电炉电源实现:Using DSP as the core control chip, it can be realized by using the medium frequency electric furnace. ①PWM驱动控制信号生成;The PWM driver control signal generation; ②频率数字锁相环跟踪;Frequency digital locking ring tracking; ③功率闭环控制;Power closed-loop control; ④过电压、欠电压、缺相、过电流、过热保护;Overvoltage, undervoltage, lack of phase, overcurrent, overheat protection; ⑤故障自诊断与报警;Fault diagnosis and alarm; ⑥参数显示;In the case of an argument; ⑦远程遥控、遥测及人机界面等多种功能。中频电炉的工作状况相对复杂,运用智能控制可使中频电炉对象(工件形状、材料)、加热过程中被加热电源的功率、频率参数,使加热T件的处理性能与质量,满足规范中设置的工艺参数要求。这一切均可运用数字信号处理器芯片及计算机来完成,不仅提升了中频电炉电源的品质,而且对中频电炉生产实现自动化具有重要意义。The various functions such as remote remote control, telemetry and man-machine interface etc. The working conditions of intermediate frequency electric furnace is relatively complex, using intelligent control can make the intermediate frequency electric furnace object (the shape, material), is heated in the process of heating power, frequency parameters of power supply, make the heating T processing performance and quality, and satisfy the requirement of the standard set in the process parameters. All can use of digital signal processor chip and computer to complete, not only improving the quality of the intermediate frequency electric stove power supply, and production automation of intermediate frequency electric furnace is of great significance.新闻中心aywl2017-05-12 09:06金属加热为什么要选择中频电源?http://www.zhongpindianlu.net/news/770.htm新闻中心aywl2017-05-08 08:28中频电源常见的故障点排除http://www.zhongpindianlu.net/news/769.htm新闻中心aywl2017-05-04 09:18中频电源维修时需要望、闻、问、切后判断故障所在的位置http://www.zhongpindianlu.net/news/768.htm新闻中心aywl2017-05-02 08:33中频电炉熔炼铸钢过程强化冶金反应http://www.zhongpindianlu.net/news/767.htm新闻中心aywl2017-04-27 08:01中频感应炉的发展得益于静力变频器的使用http://www.zhongpindianlu.net/news/764.htm新闻中心aywl2017-04-20 06:41冲天炉与电炉熔炼灰铁的区别http://www.zhongpindianlu.net/news/763.htm新闻中心aywl2017-04-14 09:13正反测在中频电源线路http://www.zhongpindianlu.net/news/762.htm新闻中心aywl2017-04-10 08:56维护中频炉首先要做到http://www.zhongpindianlu.net/news/761.htm新闻中心aywl2017-04-07 08:26中频电炉冬季常规维护保养的基本几个要点http://www.zhongpindianlu.net/news/761.htm新闻中心aywl2017-04-05 07:20冷却水系统的故障预防措施http://www.zhongpindianlu.net/news/759.htm新闻中心aywl2017-03-30 08:26什么是串联谐振中频电源?http://www.zhongpindianlu.net/news/758.htm什么是串联谐振中频电源?What is the series resonance medium frequency power supply? 串联中频设备以其良好的技术指标及节能效果在感应加热市场大受欢迎,在欧美等发达国家,串联中频设备早已占据主导地位。在国内,由于此类设备不为多数厂家所认知,所以并联中频设..什么是串联谐振中频电源?What is the series resonance medium frequency power supply? 串联中频设备以其良好的技术指标及节能效果在感应加热市场大受欢迎,在欧美等发达国家,串联中频设备早已占据主导地位。在国内,由于此类设备不为多数厂家所认知,所以并联中频设备仍占有很大的市场份额,但随着我们环保节能的理念日益加深,不久之后,东阳市振吴中频电炉有限公生产的串联中频设备将会大受各厂家所熟知,成为感应加热行业的主导产品。Series intermediate frequency equipment, with its good technical index and energy saving effect in the induction heating market popular, in Europe and the United States and other developed countries, the series has long been dominated by intermediate frequency equipment. In domestic, because such devices do not cognitive by most of the manufacturer, so parallel intermediate frequency equipment still occupy a large market share, but as we the concept of environmental protection and energy saving in deepening, soon after, dongyang vibration Wu Zhongpin series intermediate frequency electric co., LTD and production equipment will be known by each manufacturer, induction heating industry has become the dominant products. 节能20%Energy saving 20% 铸造业是机械制造业中的高能耗行业。是必须强力推行节能降耗的主要对象。熔炼设备是铸造行业高能耗主要设备之一,因此,熔炼设备的高效节能技术的运用与推广就摆在了铸造业“节能降耗”的首位。Foundry industry is high energy consumption in mechanical manufacturing industry. Must be with the main object of energy saving and consumption reducing. Smelting equipment is one of the main equipment of high energy consumption in foundry industry, as a result, the use of smelting equipment of high efficiency and energy saving technology and promotion in the foundry industry in the "energy saving" first. 串联谐振电源相比并联谐振电源,无功电流小,使电耗大幅减少,熔炼铁到1450℃,在变压器配置合理的情况下,每吨电耗可以控制在560度以内,大大降低了企业的生产成本,提高的铸件的价格竞争力,传统的并联谐振电源,每吨电耗在650吨以上。Series resonance power compared with the parallel resonant power, reactive current is small, the power consumption greatly reduced, smelting iron to 1450 ℃, under the condition of the reasonable configuration of transformer, power consumption per ton can control within 560 degree, greatly reduces the production cost of enterprise, enhance the competitiveness of the price of casting, the traditional parallel resonant power supply, power consumption per ton in 650 tons. 同时串联谐振中频电源,可“一拖二”串联电路,即一台整流变压器同时带两台炉体,一台用于熔炼,一台用于保温,两台炉体功率随意切换分配,可省去一台变压器的容量费。Series resonant frequency power supply at the same time, can "yi tuo 2" series circuit, namely a rectifier transformer with two electric furnace at the same time, a used in smelting, a used for heat preservation, two furnace random switching power allocation, the capacity of a transformer fee. 串联“一拖二”,另一优势就是可以两台炉体同时浇筑,满足小型铸造企业偶尔需要浇筑超过炉体容量的大铸件。使电炉使用更加灵活方便。Series "yi tuo 2", another advantage is the ability to two electric furnace casting at the same time, meet the needs of the small foundry enterprises occasionally pouring over furnace capacity of large castings. Results in more flexible and convenient use of electric furnace. 功率因素高High power factor 在不少省份的铸造企业,由于电炉设备功率因素低,每月被供电部门罚款。In many provinces of foundry enterprises, power factor is low due to the electric equipment, power supply departments have been fined a month. 串联谐振电源功率因素高。中频电源是电压型串联逆变电源,整流一直工作在零度,不调整流,只调逆变,所以功率因素高,大于0。95,无高次谐波。在所有的熔炼厂场总在节能、操作、生产各方面为用户提供实质性的利益。我们保证设备在任何工况下功率因素始终大于0。95。Series resonance power supply power factor is high. Medium frequency power supply is a voltage type series inverter power supply, rectifier has been working in zero, dont adjust the flow, only the inverter, so the power factor is high, greater than zero. 95, no high order harmonic. In all of the smelting plant in energy saving, operation and production to provide users with substantial interests in all respects. We guarantee that the equipment under any conditions power factor is always greater than zero. 95.新闻中心aywl2017-03-20 09:42中频感应熔炼炉工作频率http://www.zhongpindianlu.net/news/757.htm中频感应熔炼炉工作频率在50Hz-10kHz 之间,需用变频器予以调频。中频感应熔炼炉以其电效率和热效率高、熔炼时间短、耗电较省、占地较少、投资较低、生产灵活和易于实施过程自动化等, 比工频感应熔炼炉更有优势。它适合熔炼各种铸铁, 特别适合熔炼合金铸铁、球墨铸铁和蠕..中频感应熔炼炉工作频率在50Hz-10kHz 之间,需用变频器予以调频。中频感应熔炼炉以其电效率和热效率高、熔炼时间短、耗电较省、占地较少、投资较低、生产灵活和易于实施过程自动化等, 比工频感应熔炼炉更有优势。它适合熔炼各种铸铁, 特别适合熔炼合金铸铁、球墨铸铁和蠕墨铸铁,并对炉料的适应性较强, 炉料的品种和块度可在较宽范围内变动。中频感应熔炼炉具备其它铸铁熔炼用炉没有的优点, 使其近年来得到令人瞩目的发展,并在铸铁生产中广泛采用。 Medium frequency induction melting furnace working frequency between 50 hz to 10 KHZ, need FM frequency converter. Medium frequency induction melting furnace with its electrical efficiency and high thermal efficiency, short smelting time, the province, covers an area of less power consumption, low investment, flexible and easy to implement production process automation, etc., have more advantages than the power frequency induction furnace. It is suitable for various cast iron smelting, is especially suitable for smelting alloy cast iron, nodular cast iron and vermicular cast iron, and good adaptability of furnace charge, the burden of the breed and fragmentation can change in a wider scope. Medium frequency induction melting furnace has the advantages of the other cast iron smelting furnace without, make its get remarkable development in recent years, and widely used in the production of cast iron. 1、可控硅变频器 1, thyristor converter 中频感应熔炼炉的发展得益于可控硅变频器的使用。这种变频器通过直流中间回路, 用电子装置将三相交流电频率转换为所需的频率, 其效率95%-98%。新一代变频器采用数控电子线路为变频器提供了各种控制调节和保护功能。中频感应熔炼炉使用的变频器额定功率不断提高, 9000kW 变频器连接在12t 的炉子上, 铁液的熔化率为18t / h; 将中频感应熔炼炉功率密度提高到1000kW/ t , 能使熔化期缩短到35min。感应熔炼炉的熔化率依炉子的容量而变化, 一般中频感应熔炼炉熔化铁液的熔化率为0.14-35t / h。例如, 使用2t 容量的炉子, 可得到2 -2.38t/ h 的熔化率, 使用12t 容量的炉子则可达到18-21t/ h 的熔化率; 而采用工频感应熔炼炉熔化冷料的熔化率是: 115t 炉为0.75t/ h、3t 炉为1.5t/ h、5t炉为2.5t/ h、10t 炉为4t / h。可见中频感应熔炼炉的熔化率远大于工频感应熔炼炉, 这就可在选择铸铁生产熔炼设备时以小代大, 使用较小容量的中频感应熔炼炉代替较大容量的工频感应熔炼炉, 既减少了占地面积, 又降低了投资, 也保证了铁液的连续供应, 对于连续作业、生产能力较大的铸铁生产厂家十分有利。将中频感应熔炼炉用于连续铸造和离心铸造球墨铸铁管生产的铁液熔炼, 以它代替冲天炉, 或与高炉、冲天炉进行双联, 其生产能力将可得到充分发挥。 The development of the medium frequency induction melting furnace thanks to the use of thyristor inverter. This kind of inverter dc intermediate circuit, the three-phase alternating current frequency conversion with electronic devices for the required frequency, the efficiency of 95% to 95%. A new generation of inverter adopts numerical control circuit for frequency converter provides a variety of control and protection functions. Medium frequency induction melting furnace using the converter power rating, 9000 kw inverter connected to the 12 t on the stove, iron melting rate of 18 for t/h; The medium frequency induction melting furnace power density increased to 1000 kw/t, can make the melting period reduced to 35 min. Induction furnace melting rate varies according to the capacity of the furnace, the general medium frequency induction furnace melting iron melting rate is 0.14-35 t/h. For example, using the 2 t capacity stove, can get the fusion rate of 2-2.38 t/h, use the capacity of 12 t furnace can reach 18-21 t/h melting rate; With power frequency induction furnace melting slag melting rate: 115 t furnace is 0.75 t/h, 3 t furnace is 1.5 t/h, 2.5 t/h 5 t furnace, 10 t furnace for 4 t/h. Visible medium frequency induction furnace melting rate is greater than the power frequency induction melting furnace, it is a when choosing cast iron smelting production equipment with small generation, using a smaller capacity of medium frequency induction melting furnace instead of large capacity of power frequency induction melting furnace, both reduced the area, and reduce the investment, and ensures the continuous supply of iron liquid, for continuous operation, production capacity of large cast iron manufacturers. The medium frequency induction melting furnace used for continuous casting and centrifugal casting ductile iron pipe production of iron smelting, replace the cupola with it, or double with blast furnace, cupola, its production capacity will be available to give full play to.新闻中心aywl2017-03-15 08:39不同的应用领域对中频电源有不同的要求http://www.zhongpindianlu.net/news/756.htm中频电炉广泛应用于钢铁、铸造、特钢等相关领域,不同的应用领域对中频电源有不同的要求,只有在熟练掌握这些电路的基本工作原理和功率器件基本特性的基础上,才能迅速、准确地分析、判断故障原因,采取有效的措施排除故障。Intermediate frequency electric furnace is..中频电炉广泛应用于钢铁、铸造、特钢等相关领域,不同的应用领域对中频电源有不同的要求,只有在熟练掌握这些电路的基本工作原理和功率器件基本特性的基础上,才能迅速、准确地分析、判断故障原因,采取有效的措施排除故障。Intermediate frequency electric furnace is widely used in steel, casting, special steel, etc, different applications have different requirements of the medium frequency power, only in mastering the basic working principle of the circuit and power device, on the basis of the basic features, can quickly and accurately judge fault reason analysis, and take effective measures to eliminate failures. 在此,对产品典型故障进行探讨分析,希望能给您提供帮助。At this point, discusses and analyzes the typical of product failure, the hope can give you help. 1、开机,设备不能正常起动1, boot, equipment not starting properly 故障现象:起动时直流电流大,直流电压和中频电压低,设备声音沉闷。Fault phenomenon: direct current when starting, low voltage dc voltage and frequency, equipment sounds boring. 分析处理:逆变桥有一桥臂的晶闸管可能短路或开路,造成逆变桥三臂桥运行。用示波器分别观察逆变桥的四个桥臂上的晶闸管管压降波形,若有一桥臂上的晶闸管的管压降波形为一线,该晶闸管已穿通;若为正弦波,该晶闸管未导通。更换已穿晶闸管;查找晶闸管未导通的原因。Analysis: there is a bridge inverter bridge arm of the thyristor may short circuit or open circuit, inverter bridge three arm bridge operation. Oscilloscope were observed four bridge inverter bridge thyristor (tube voltage waveform on the arm of the if there is an arm of the bridge thyristor tube voltage waveform is a line, the thyristor has been through; If the sine wave, the thyristor conduction. Replacement has been wearing thyristor; Find the thyristor conduction of reason. 2、设备能起动,但工作状态不对2, the equipment can start, but the condition is wrong 故障现象:设备能正常顺利起动,当功率升到某一值时,过压或过流保护。Fault phenomenon: equipment can normal starting smoothly, when power up to a certain value, the over-voltage or over-current protection. 分析处理:分两步查找故障原因:Analysis: to find the cause of the problem in two steps: 1)、先将设备空载运行,观察电压能否升到额定值。若电压不能升到额定值,并且多次在电压某一值附近过流保护。这可能是补偿电容或晶闸管压不够造成的,但也不排除是电路某部分打火造成的;1), equipment running light first, observation can rise to the rating voltage. If cant rise to the rating voltage, and repeatedly over-current protection in the vicinity of a voltage value. This may be a compensation or thyristor voltage is not enough to cause, but does not rule out is caused by light circuit part; 2)、若电压能升到额定值,可将设备转入重载运行,观察电流值是否能达到额定值,若电流不能升到额定值,并且多次在电流某一值附近过流保护,这可能是大电流干扰。要特别注意中频大电流的电磁场对控制部分和信号线的干扰。2), if the voltage can rise to the ratings, but putting the equipment into overload operation, observe whether the current value can reach rating, if cant rise to the current ratings, and near the current a value many times over-current protection, this may be a large current interference. It is important to pay special attention to the intermediate frequency electromagnetic field to control the part of the large current interference and signal lines. 3、设备正常运行时,易出现的故障3, equipment normal operation, easy to appear the fault 故障现象:设备运行正常,但在正常过流保护动作时,烧毁多支KP晶闸管和快熔。Fault phenomenon: equipment operation is normal, but in normal over-current protection action, burning more than KP thyristor and the fast fuse. 分析处理:过流保护时,为了向电网释放平波电抗器的能量,整流桥由整流状态转到逆变状态,这时如果а>1500就有可能造成有源逆变颠覆,烧毁多支晶闸管和快熔,开关跳闸,并伴随有巨大的电流短路爆炸声。对变压器产生较大的电流和电磁力冲击,严重时会损坏变压器。Analysis: over-current protection, in order to to the grid flat wave reactor of energy released, rectifier bridge rectifier state to the inverter state, at this moment if а > 1500 is likely to cause active inverter, burning more than thyristor and the fast fuse, switch trip, and is accompanied by huge short-circuit current explosion. A bigger current and electromagnetic force impact of transformer, serious will damage the transformer.新闻中心aoyouwl2017-03-14 14:10中频炉及中频电源的冷却http://www.zhongpindianlu.net/news/754.htm水系统布置要点Water system arrangement 中频炉及中频电源的冷却应分别采用各自独立的全封闭冷却塔。采用相互独立的冷却装置的目的是为了避免相互影响。因为中频电源需要低温的冷却水,出水温度要控制在50以内,但电炉感应线圈的冷却水温度可以略高,这样反而能够提高电..水系统布置要点Water system arrangement 中频炉及中频电源的冷却应分别采用各自独立的全封闭冷却塔。采用相互独立的冷却装置的目的是为了避免相互影响。因为中频电源需要低温的冷却水,出水温度要控制在50以内,但电炉感应线圈的冷却水温度可以略高,这样反而能够提高电炉的热效率,同时减小冷却装置的体积,进而减低造价。Intermediate frequency furnace and medium frequency power supply cooling should be used respectively independent closed cooling tower. Adopt independent of each other is the purpose of the cooling device in order to avoid influence each other. As intermediate frequency power supply need to low temperature of cooling water, the water temperature to control within 50, but electric furnace cooling water temperature of the induction coil can be slightly tall, so it can enhance the heat efficiency of furnace, at the same time reduce the volume of a cooling device, thus reducing cost. 冷却水系统的故障预防措施Failure of the cooling water system for preventive measures 冷却水系统是中频电源和中频炉正常工作的基本保证,因为整个系统的主要器件都是水冷的。所以对冷却水系统进行严格的监控是非常重要的。通常水系统可能出现的故障包括水泵或水泵电机损坏,水泵漏水造成水流量不足,冷却水软管破裂等。为了能够检测到这些故障,需要在冷却水系统的进水处安装压力表,在每个水冷器件上安装了温度传感器。这些传感器的信号都送到控制系统,控制系统据此判断冷却水系统的工作情况。这些信号与中频电源联锁。当水系统出现水温高,水压低或水流量不足时,中频电源会报警并自动停机。Cooling water system is the basic guarantee for the normal work of the medium frequency power supply and medium frequency furnace, because the whole systems main components are water cooled. So for strict monitoring of cooling water system is very important. Possible failure usually water system including water pump or pump motor damage, water pump leaking caused by water flow is insufficient, the cooling water hose burst, etc. In order to be able to detect these faults, it is necessary to install in cooling water system of feed water pressure gauges, temperature sensors on each water-cooling device installed. These sensors signals are sent to the control system, control system on the basis of judging the performance of the cooling water system. These signals and intermediate frequency power supply chain. When there is high temperature water system, water down or insufficient water flow, the intermediate frequency power supply will alarm and automatically stop.新闻中心aywl2017-03-08 09:01中频炉冷却水系统简介http://www.zhongpindianlu.net/news/753.htm中频炉冷却水系统简介Intermediate frequency furnace cooling water system 全封闭冷却水系统包括冷却塔,水泵,高位水箱,储水箱和配套的用于水温,水压,流量检测的传感器和仪表。冷却装置的核心是喷淋蒸发式封闭冷却塔。在冷却塔内部有许多散热盘管,循环水在盘管内..中频炉冷却水系统简介Intermediate frequency furnace cooling water system 全封闭冷却水系统包括冷却塔,水泵,高位水箱,储水箱和配套的用于水温,水压,流量检测的传感器和仪表。冷却装置的核心是喷淋蒸发式封闭冷却塔。在冷却塔内部有许多散热盘管,循环水在盘管内部流动,与空气不接触。冷却塔的下面有集水盘,内装喷淋用水,集水盘的进水口装有浮球阀,能够自动控制集水盘内的水位,出水口有喷淋水泵。冷却塔的上部装有喷水口和冷却风机。工作时喷淋水泵将水泵到上部的喷水口,将水打散呈细水珠状喷到盘管外表面,冷却风机同时抽风,使喷淋水汽化从而带走盘管内循环水的热量。Closed cooling water system including the cooling tower, water pump, high water tank, storage tank and matching for water temperature, pressure, flow detection sensors and instrumentation. At the heart of the cooling device is spray evaporative cooling towers, closed. There are many cooling coil inside the cooling tower, circulating water flow inside the coil, do not contact with air. Within the bottom of the cooling tower water dish, water spray, water pan is the water inlet is equipped with floating ball valve, automatically control the water level in the water dish, spray pump outlet. The upper portion of the cooling tower is equipped with water and cooling fan. Work spray pump will pump water to the upper part of the mouth, break up is fine water spray the water to the coil surface, cooling fan convulsions, at the same time make spray evaporative water take away heat coil circulating water. 水系统布置要点Water system arrangement 中频炉及中频电源的冷却应分别采用各自独立的全封闭冷却塔。采用相互独立的冷却装置的目的是为了避免相互影响。因为中频电源需要低温的冷却水,出水温度要控制在50以内,但电炉感应线圈的冷却水温度可以略高,这样反而能够提高电炉的热效率,同时减小冷却装置的体积,进而减低造价。Intermediate frequency furnace and medium frequency power supply cooling should be used respectively independent closed cooling tower. Adopt independent of each other is the purpose of the cooling device in order to avoid influence each other. As intermediate frequency power supply need to low temperature of cooling water, the water temperature to control within 50, but electric furnace cooling water temperature of the induction coil can be slightly tall, so it can enhance the heat efficiency of furnace, at the same time reduce the volume of a cooling device, thus reducing cost.新闻中心aywl2017-03-08 09:01电容器的检测方法http://www.zhongpindianlu.net/news/752.htm主要元器件的检测The main components of the test 1.可控硅的检测方法1. The SCR detection method 用数字式万用表200KΩ挡测可控硅正反向电阻,应在10KΩ~100KΩ之间(阻值受水路影响)。In digital multimeter 200 k Ω gear measuring positive and negat..主要元器件的检测The main components of the test 1.可控硅的检测方法1. The SCR detection method 用数字式万用表200KΩ挡测可控硅正反向电阻,应在10KΩ~100KΩ之间(阻值受水路影响)。In digital multimeter 200 k Ω gear measuring positive and negative resistance to SCR should be between 10 k Ω ~ 100 k Ω (resistance affected by water). 用数字式万用表200Ω挡测可控硅门极电阻,应在10Ω~20Ω之间。Measurement with digital multimeter 200 Ω SCR gate resistance, should be between 10 Ω ~ 20 Ω. 2.电容器的检测方法2. The measuring method of capacitor 拆开电容器的连接铜排。用绝缘摇表测试各电容器每个柱子是否充放电,正常应能充放电。注意:选用的绝缘摇表电压不能大于电容器额定电压。用电感电容表测各电容器每个柱子容量值是否正常。The connection of copper platoon apart capacitor. With insulation shake table test whether each pillar to charge and discharge the capacitor, normal should be able to charge and discharge. Note: choose the insulation of the shaking table no voltage is greater than the capacitor voltage rating. Each capacitor with lc table test each column capacity value is normal. 3.炉子的检测方法3. The detection method of the furnace 观察匝间是否短路:线圈对保护地绝缘是否良好。Observe whether the turn-to-turn short circuit: coil to protect the insulation are in good condition. 4.电路板检测须专业人员用示波器检测,怀疑其有问题时,可直接更换。4. PCB inspection must be professionals with an oscilloscope, doubt its have a problem, can be directly replaced. ㈤.中频感应加热电源常见故障与维修All measures. Medium frequency induction heating power supply and maintenance of common failures 中频电源广范应用于熔炼透热淬火焊接等领域,不同的应用领域对中频电源有不同的要求,因此中频电源的控制电路和主电路有不同的结构形式,只有在熟练掌握这些电路的基本工作原理和功率器件的基本特性的基础上,才能快速准确地分析判断故障原因采取有效的措施排除故障。在此仅对典型电路和常见故障进行探讨。Intermediate frequency power supply wide applications in areas such as smelting heating quenching welding, different applications have different requirements of the medium frequency power, so the control circuit and main circuit of intermediate frequency power supply has different structure forms, only in mastering the basic working principle of the circuit and on the basis of the basic characteristic of the power device, can rapidly and accurately judge fault reason analysis to adopt effective measures to eliminate failures. Here only the typical circuit and the common faults are discussed. 1、开机设备不能正常起动1, the boot device not starting properly 1.1故障现象:起动时直流电流大,直流电压和中频电压低,设备声音沉闷过流保护。1.1 malfunction phenomenon: direct current when starting, low voltage dc voltage and frequency, equipment over-current protection deep voice. 分析处理:逆变桥有一桥臂的晶闸管可能短路或开路造成逆变桥三臂桥运行。用示波器分别观察逆变桥的四个桥臂上的晶闸管管压降波形,若有一桥臂上的晶闸管的管压降波形为一线,该晶闸管已穿通;若为正弦波,该晶闸管未导通,更换已穿晶闸管,并查找晶闸管未导通的原因。Analysis: there is a bridge inverter bridge arm of the thyristor may cause short circuit or open circuit inverter bridge running three arm bridge. Oscilloscope were observed four bridge inverter bridge thyristor (tube voltage waveform on the arm of the if there is an arm of the bridge thyristor tube voltage waveform is a line, the thyristor has been through; If the sine wave, the thyristor conduction, replacement has wear thyristor, and find the cause of the thyristor conduction not.新闻中心aywl2017-02-20 09:48中频电源系统维护http://www.zhongpindianlu.net/news/775.htm新闻中心aywl2017-02-20 09:47感应电炉炉衬损毁的机理http://www.zhongpindianlu.net/news/750.htm感应电炉炉衬损毁的机理The mechanism of induction furnace lining damaged 炉衬材料在使用过程中发生损毁现象,那为什么会发生损毁哪?发生损毁的机理是什么?这是因为融化状态下的金属、金属里面的氧化物、金属溶液里面的熔渣和温度应力的作用造成的。感应电炉的炉衬比..感应电炉炉衬损毁的机理The mechanism of induction furnace lining damaged 炉衬材料在使用过程中发生损毁现象,那为什么会发生损毁哪?发生损毁的机理是什么?这是因为融化状态下的金属、金属里面的氧化物、金属溶液里面的熔渣和温度应力的作用造成的。感应电炉的炉衬比较薄,烧结后的炉衬成为三个层次,靠近金属液的部分称为烧结层,占整个炉衬厚度的28-31%,中间部分称为半烧结层,占整个炉衬厚度的28-31%,靠近感应圈的部分称为缓冲层,占炉衬厚度的27-32%。这三个层次中存在着较大的温度梯度,极易造成炉衬的开裂和剥落。当熔融的金属、金属氧化物或熔渣沿炉衬的裂纹渗透到纵深内部时就会发生以下现象:1、熔融金属发生氧化还原反应或者生成低熔点物质,致使炉衬遭到侵蚀、龟裂、剥落。2、熔融金属和炉衬材料发生氧化反应并伴随着体积膨胀,造成炉衬的膨胀而塌落。3、熔融金属或者熔渣自身对炉衬产生的冲刷和侵蚀。Lining material damage occur in the process of using, why would happen damage? What is the mechanism of the damaged? This is because the melting state of the inside of the metal, metal oxides, metal solution in the slag and the effect of temperature stress caused by. Induction furnace lining is more thin, after sintering furnace lining into three levels, near the metal part is called sintering layer, 28-31% of the total thickness of the lining, the middle section is called a sintering layer, 28-31% of the total thickness of the lining, close to the part of the induction coil, called a buffer layer, 27-32% of the thickness of the lining. The three level there is a large temperature gradient, lining cracking and peeling off easily. When the molten metal, metal oxide or slag lining crack along the permeate deep inside will occur when the following phenomena: 1, the molten metal REDOX reaction or generate low melting point material, the furnace lining erosion, cracking and peeling. 2, molten metal and oxidizing reaction furnace lining materials and with the volume expansion, the expansion of the lining caused the damage. 3, molten metal or molten slag itself to the lining erosion and erosion.新闻中心aywl2017-02-17 08:57中频电炉炉衬耐火材料在使用过程http://www.zhongpindianlu.net/news/749.htm中频电炉炉衬耐火材料在使用过程中,不同生产厂家炉衬材料的使用寿命存在着天壤之别。有的材料经过有经验操作人员的精心使用,经过一次中修和及时小修,熔炼球铁,炉衬平均寿命能达到近千炉次,熔炼高铬铸铁炉衬平均寿命能达到550炉次,熔炼低合金铸铁炉衬平均寿命能达到..中频电炉炉衬耐火材料在使用过程中,不同生产厂家炉衬材料的使用寿命存在着天壤之别。有的材料经过有经验操作人员的精心使用,经过一次中修和及时小修,熔炼球铁,炉衬平均寿命能达到近千炉次,熔炼高铬铸铁炉衬平均寿命能达到550炉次,熔炼低合金铸铁炉衬平均寿命能达到630炉次。而有的炉衬材料使用几十炉次甚至几炉就发生穿炉现象。也有时会出现同一厂家的炉衬材料同一位操作人员,在不同的电炉上使用效果也存在着很大差异。为什么会出现这种现象?这时人们往往会认为炉衬材料的质量有问题。其实出现这种现象,不单单是材料的质量问题,也和操作人员平时的使用习惯和对电炉的日常保养维护也有很大关联。通过十几年对客户使用情况的调查分析,石家庄金峰铸造材料有限公司的技术研究人员总结出了影响炉衬材料使用寿命的几大因素和使用过程的注意事项。通过对操作人员的培训,让他们了解这些基本知识,从而提高炉衬材料的使用寿命,为客户的企业降低了生产成本,提高了生产效率。受到客户朋友的一致好评。下面咱们就从以下几点向大家介绍一下这方面的知识。Intermediate frequency electric furnace lining refractory material in use process, different manufacturers the service life of furnace lining materials there are worlds apart. Some of the material after careful use of experienced operators, after a long and minor repair in time, smelting iron ball, lining the average life expectancy reaching nearly thousand times, smelting high chromium cast iron lining life expectancy can reach 550 times, smelting low alloy cast iron lining life expectancy to reach 630 furnace. And some even a few furnace lining material used dozens of furnace time in furnace occur. Sometimes the same manufacturer lining material of the same operator, using effect in different electric stove there are great differences. Why will appear this kind of phenomenon? At this time people tend to think that the quality of lining material has a problem. Actually appear this kind of phenomenon, not only is the quality problem of the material, and operators at ordinary times also use habits and daily maintenance of furnace maintenance are highly correlated. Through more than ten years on the investigation and analysis of customer usage, shijiazhuang caxa casting material co., LTD. Technology researchers summarized of several factors affect the service life of the furnace lining materials and the use of process matters needing attention. Through the training of operating personnel, let them know the basic knowledge, to improve the service life of furnace lining materials, for clients to reduce the production cost of enterprise, improve the production efficiency. By customers friends consistent high praise. Below we will from the following introduce this knowledge.新闻中心aywl2017-02-17 08:56总结炉衬寿命的判断方法http://www.zhongpindianlu.net/news/748.htm因为中频电炉炉衬材料价格比较昂贵,并且筑炉时间也比较长等因素,所以电炉炉衬使用时间能延长一次也是值得去争取的。然而有的时候为了多使用一次很可能发生炉衬被铁液穿透,后果很严重甚至危及设备和人身的安全。这就要求我们准确判断炉衬的寿命。Because of intermedi..因为中频电炉炉衬材料价格比较昂贵,并且筑炉时间也比较长等因素,所以电炉炉衬使用时间能延长一次也是值得去争取的。然而有的时候为了多使用一次很可能发生炉衬被铁液穿透,后果很严重甚至危及设备和人身的安全。这就要求我们准确判断炉衬的寿命。Because of intermediate frequency electric furnace lining material price is quite expensive, and factors such as construction time is long, so the electric furnace lining can use time to extend a is worth fighting for. However, sometimes in order to use a more likely lining is iron liquid penetration, consequence is very serious and even endanger the safety of the equipment and personal. This requires that we accurately judge the service life of furnace lining. 经过多年经验,总结炉衬寿命的判断方法如下:After many years of experience, summed up the lining life judgment method is as follows: (1)根据以往经验推算炉衬寿命,在炉衬寿命快到时注意观察电炉频率表、电压表、电流表等,如果这些表的表针在正常工作情况下不断摆动,本次工作结束后炉衬寿命将尽不要再继续使用。(1) calculate lining life based on past experience, in pay attention to the electric furnace lining life faster when frequency table, voltmeter and ammeter, if these tables whose hands under normal working condition of oscillation, the lining life after work will try not to continue to use. (2)操作工用铁棍正常扒渣接触铁液有触电感时,注意观察电炉工作声音,如果声音 “发闷”甚至出铁液时声音变化明显,说明铁液已侵入炉衬甚至击穿炉衬,应根据情况处理炉内铁液并不再继续使用。(2) operator with iron contact normal grilled slag iron liquid has the feeling of electric shock, observe furnace work, if the sound "fullness" and even change the voice obvious at the time of the liquid iron, that iron has invaded the breakdown lining, lining and even in the treatment of molten iron in furnace as the case may be and does not continue to use. (3)电路工作声音明显变“闷”,电路外壳与其他接地体接触电源便停止工作时,说明铁液已击穿炉衬,应马上切断电源倒出炉内铁液,停止继续使用。(3) the circuit work voice became "boring", contact power supply circuit shell and other grounding system will stop working when the liquid iron has breakdown lining, should immediately cut off power supply of molten iron in pour out, stop to continue to use.新闻中心aywl2017-02-17 08:56中频电炉五大保养要点http://www.zhongpindianlu.net/news/747.htm中频电炉五大保养要点Intermediate frequency electric furnace five maintenance points 1、定期清除电源柜内积尘1, regular removal of power dust contained in the cabinet 尤其是可控硅管芯外部,要用酒精擦除干净。运行中的变频装置一般都有专用机房,但实际作业环..中频电炉五大保养要点Intermediate frequency electric furnace five maintenance points 1、定期清除电源柜内积尘1, regular removal of power dust contained in the cabinet 尤其是可控硅管芯外部,要用酒精擦除干净。运行中的变频装置一般都有专用机房,但实际作业环境并不理想在熔炼锻压工序,粉尘很大震动强烈。在透热淬火工序,装置厂靠近酸洗磷化等作业设备,有较多腐蚀性气体,这些都会对中频电炉相关装置的元件起到破坏作用,降低装置的绝缘强度在积尘较多时,往往会发生元件表面放电现象,因此必须注意经常清洗工作,防止故障发生;Especially the silicon controlled rectifier tube core is external, want to use alcohol to wipe clean. Operation of variable frequency device generally has special room, but the actual work environment is not ideal in the forging process of smelting and dust vibrate strongly. In heating quenching process, the device factory near the work equipment, such as pickling phosphating more corrosive gas, these will be for the intermediate frequency electric furnace related device components damage effect, decreases the insulation strength of the device are too many in the dust, the components surface discharge phenomenon can occur, so must pay attention to often clean work, prevent failure; 2、定期检查水管接头扎结是否牢靠2, regularly check the pipe joint tie is strong 使用自来水井水作为中频电炉装置的冷却水源时,易积存水垢,影响冷却效果。在塑料水管老化产生裂纹时,应及时更换装置。在夏天运行时采用自来水井冷却往往容易发生凝露现象,应该考虑使用循环水系统,凝露严重时应该立即停止运行;Use tap water Wells as the intermediate frequency electric furnace equipment, the cooling water, easy to stockpile scale, affect the cooling effect. In the plastic conduit ageing crack, should timely replacement device. Runtime USES tap water Wells in summer cooling condensation occur easily, should consider the use of circulating water system, lon serious when should immediately stop running; 3、定期更换或清洗中频电炉相关设备的关键部件3, regular replacement or cleaning medium frequency electric furnace key components of the related equipment 4、定期对装置进行检修4, for device maintenance on a regular basis 对装置各部件的螺栓和紧固接触器继电器的触头要进行定期检查,若出现松动或接触不良现象,均应及时修理更换,不能勉强使用,防止引起重大事故。Every parts of device bolt fastening contactor and relay contactor to conduct regular inspection, if appear, loosening or poor contact, shall be promptly repaired change, can not be forced to use, to prevent major accidents. 5、定期检查负载的接线是否良好,绝缘是否可靠。5, check the wiring of the load are in good condition and are reliable. 透热感应圈内积存的氧化皮要及时清理;隔热炉衬有裂纹要及时跟换;熔炼炉在更新炉衬后,应注意检查;绝缘变频装置的负载都设在工作现场,故障比较高,而往往被人忽视,因此,加强对负载的维护,防止故障波及变频电源是保证装置正常运行的重要一环。Heat-sensitive circles through the accumulation of scale should be clear in time; Heat insulation lining crack to follow change in time; Melting furnace after the update lining, inspection should be paid attention to; Insulation of variable frequency device load in work site, the fault is higher, but often neglected, therefore, to strengthen the maintenance of the load, to prevent the failure affected variable frequency power supply is an important link to ensure normal operation of the plant.新闻中心aywl2017-02-15 08:30中频设备维修时http://www.zhongpindianlu.net/news/746.htm在中频设备维修时经常可以发现在维修时花费了大量的精力和时间,往往最后的原因很简单。如:连线虚接、螺钉未紧固、断水、某器件烧坏等。为了缩短维修时间,就需要我们在维修时不断的总结经验,勤于观察,同时也要掌握一些维修技巧。和医生给病人看病一样,在中频电源维..在中频设备维修时经常可以发现在维修时花费了大量的精力和时间,往往最后的原因很简单。如:连线虚接、螺钉未紧固、断水、某器件烧坏等。为了缩短维修时间,就需要我们在维修时不断的总结经验,勤于观察,同时也要掌握一些维修技巧。和医生给病人看病一样,在中频电源维修时需要望、闻、问、切后判断故障所在的位置。In the intermediate frequency equipment maintenance can often be found in the maintenance cost a lot of time and energy, often the last reason is very simple. Such as: virtual attachment, screw fastening and water, such as a device to burn out. In order to shorten the maintenance time, we need to constantly sum up experience in maintenance, and observation, but also to grasp some maintenance techniques. And doctors give patients, in medium frequency power supply when maintenance after need to inspection, auscultation and olfaction, inquiry, and pulse-taking and palpation determine fault location. look: the so-called hope is to observe the equipment within the parameters of the instrument and equipment at run time whether appearance phenomena such as fever, redness, screw loosening, related to instrument parameters and equipment running status are reviewed. In medium frequency power supply runtime intermediate frequency voltage, dc voltage, dc current three instrument has a close connection between, by observing the three parameters of instrument can judge the medium frequency power supply is operating normally. We know that the dc voltage and dc current is the product of intermediate frequency power, the ratio of dc voltage and dc current can reflect the state of load impedance matching. Such as: 250 kw intermediate frequency equipment, the highest average dc voltage is 513 v, the highest average dc current is 500 a, if the device at runtime dc voltage of 500 v, and for the 500 a dc current value, then the impedance value has reached the best match. If it is less than 500 a dc current, impedance values on the high side, if more than 500 a dc current, low impedance values. It means that the value of the dc current and dc voltage can be observed that load impedance matching conditions. dc voltage and the proportion of intermediate frequency voltage can reflect the working state of the inverter, for example: dc voltage is 510 v, intermediate frequency voltage is 700 v, inverter of anterior horn for 36 & deg; . We use 700 v / 510 v = 1.37, in general, the proportion of intermediate frequency voltage and dc voltage between 1.2 ~ 1.5 we all think that inverter is working properly. If the ratio is less than 1.2, the rake Angle is too small, inverter is very difficult to commutation; If it is greater than 1.5 times the anterior horn is too big, possible equipment failure will occur.新闻中心aywl2017-02-15 08:29主要应用及特点http://www.zhongpindianlu.net/news/745.htm主要应用及特点:Main application and characteristics: 1、频率范围大,从1KHZ-20KHZ,可根据具体加热工件的大小或透热的深度要求进行匹配,适应范围大。1, large range of frequencies, from 1 KHZ to 20 KHZ, according to the size of the specific heating workpi..主要应用及特点:Main application and characteristics: 1、频率范围大,从1KHZ-20KHZ,可根据具体加热工件的大小或透热的深度要求进行匹配,适应范围大。1, large range of frequencies, from 1 KHZ to 20 KHZ, according to the size of the specific heating workpiece or match the depth requirements of diathermy, adapt to the large range. 2、采用中频串联谐振结果,负载匹配简单,设备效率高且利用率高。2, using medium frequency series resonance as a result, the load matching, simple equipment with high efficiency and high utilization rate. 3、逆变过程:使设备在大功率下的工作可靠性大大提高,设备大功率领域得到发展,100%设备暂载率得以实现。3, inverter process: to make the work reliability of the equipment under high power is greatly increased, the equipment for high power fields development, equipment and temporary load rate achieved 100%. 4、高效节能:全功率范围内,极高的功率因数和电源效率,比可控硅中频,节电20-30%以上。4, high efficiency and energy saving: full power range, high power factor and power efficiency, than the thyristor medium frequency, power saving more than 20-30%. 5、设备体积小,可选择范围大。5, equipment, small volume, wide choice. 中频锻造加热炉Intermediate frequency forging heating furnace 应用范围:Scope of application: 突出特点:Outstanding features: 频率范围大,Frequency range is big, 1、采用IGBT功率器件,和我公司的第二代技术,设备结构简单,可靠性高,维修率低,客户可以自行方便维护,是目前应用最广泛的设备之一。1, using IGBT power components, and our company the second generation of technology, equipment simple structure, high reliability, low maintenance rate, customers can convenient maintenance by oneself, is one of the most widely used equipment. 2、1KHZ-20KHZ,可根据具体加热工作的直径,选择合适的频率。2, 1 KHZ - 20 KHZ, but according to the diameter of the heated concrete work, choose the appropriate frequency. 3、中频加热锻造炉整料(整体连续)加热时,感应圈长度为1000mm-3000mm,同时有多根料在加热,更保证了透热的效果。3 forging furnace, medium frequency heating monolith (overall) continuously heated, length is 1000 mm - 1000 mm, induction coil, at the same time have more material in heating, more to ensure the heating effect. 4、中频锻造炉采用连续加热方式,感应圈内部的负载从室温升至1100℃时,负载的变化引起设备功率电流的不断变化,使设备功率利用率到90%以上,设备得以有效利用。4 forging furnace, medium frequency using continuous heating mode, the inside of the induction coil load from room temperature to 1100 ℃, the change of the load cause the changing of equipment power current, make the equipment utilization rate of power to more than 90%, the equipment is able to effectively use.新闻中心aywl2017-02-14 08:11中频感应 应用范围http://www.zhongpindianlu.net/news/744.htm中频感应棒加热炉应用于Φ12以上钢、不锈钢、铜、钛合金等的规则棒料、方形料或其他毛坯料等的连续加热,即可用于圆棒整体加热,也可用于局部加热,如端部加热,中间部位加热等。Medium frequency induction rods used in heating furnace Φ 12 more than steel, stain..中频感应棒加热炉应用于Φ12以上钢、不锈钢、铜、钛合金等的规则棒料、方形料或其他毛坯料等的连续加热,即可用于圆棒整体加热,也可用于局部加热,如端部加热,中间部位加热等。Medium frequency induction rods used in heating furnace Φ 12 more than steel, stainless steel, copper, titanium and other rules bar, square or other blank material such as continuous heating, heating can be used for round rods as a whole, can also be used for local heating, such as heating end, middle heating, etc. 特点:采用IGBT功率器件和电流反相技术,输出振荡频率的范围可以从2KHZ至20KHZ,串并联振荡电路。体积小,大大减少占用空间。效率高,满功率输出功率因数达95%以上,能效100%输出,在最大功率24小时连续工作能力。 全显示输出功率,输出频率,输出电压和电流。Features: USES the inverse IGBT power components and current technology, output oscillation frequency range can be from 2 KHZ to 20 KHZ, series-parallel oscillation circuit. Small volume, greatly reduce the occupied space. High efficiency and full power output power factor above 95%, and 100% output of energy efficiency, the maximum power 24 hours continuous working ability. Full display output power and output frequency, output voltage and current. 简单的操作:操作可以在10分钟内学会。Simple operation: operation can learn in 10 minutes. 安装简单:输入三相AC,需配备循环冷却水。Installation is simple: input three-phase AC, should be equipped with circulation cooling water. 设备参数:Equipment parameters: 型号model JZ200BJZ200B JZ300BJZ300B JZ400BJZ400B 输入电压(V/HZ)The input voltage (V/HZ) 3×380V±20%50Hz或60Hz3 x 380 v + 20% for 50 hz or 60 hz 输入电流(A)Input current (A) 330330 420420 520520 输入功率 (KW)The input power (KW) 200200 300300 400400 振荡频率 (KHZ)Oscillation frequency (in KHZ) 1KHZ-20KHZ1 KHZ - 20 KHZ 负载持续率 (%)Duty rate (%) 100%100% 主机冷却水流量(L/h-MPa)Host of cooling water flow rate (L/h - MPa) 15/0.0215/0.02 20/0.0220/0.02 30/0.0230/0.02 主机重量 (kg)Host weight (kg) 180180 220220 240240 主机尺寸:长×宽×高(mm)The host size: length x width x height (mm) 530*760*1660530 * 760 * 1660 530*760*1660530 * 760 * 1660 600*820*1860600 * 820 * 1860新闻中心aywl2017-02-14 08:10中频电炉炉衬材料价格比较http://www.zhongpindianlu.net/news/743.htm因为中频电炉炉衬材料价格比较昂贵,并且筑炉时间也比较长等因素,所以电炉炉衬使用时间能延长一次也是值得去争取的。然而有的时候为了多使用一次很可能发生炉衬被铁液穿透,后果很严重甚至危及设备和人身的安全。这就要求我们准确判断炉衬的寿命。Because of intermedi..因为中频电炉炉衬材料价格比较昂贵,并且筑炉时间也比较长等因素,所以电炉炉衬使用时间能延长一次也是值得去争取的。然而有的时候为了多使用一次很可能发生炉衬被铁液穿透,后果很严重甚至危及设备和人身的安全。这就要求我们准确判断炉衬的寿命。Because of intermediate frequency electric furnace lining material price is quite expensive, and factors such as construction time is long, so the electric furnace lining can use time to extend a is worth fighting for. However, sometimes in order to use a more likely lining is iron liquid penetration, consequence is very serious and even endanger the safety of the equipment and personal. This requires that we accurately judge the service life of furnace lining. 经过多年经验,总结炉衬寿命的判断方法如下:After many years of experience, summed up the lining life judgment method is as follows: (1)根据以往经验推算炉衬寿命,在炉衬寿命快到时注意观察电炉频率表、电压表、电流表等,如果这些表的表针在正常工作情况下不断摆动,本次工作结束后炉衬寿命将尽不要再继续使用。(1) calculate lining life based on past experience, in pay attention to the electric furnace lining life faster when frequency table, voltmeter and ammeter, if these tables whose hands under normal working condition of oscillation, the lining life after work will try not to continue to use. (2)操作工用铁棍正常扒渣接触铁液有触电感时,注意观察电炉工作声音,如果声音 “发闷”甚至出铁液时声音变化明显,说明铁液已侵入炉衬甚至击穿炉衬,应根据情况处理炉内铁液并不再继续使用。(2) operator with iron contact normal grilled slag iron liquid has the feeling of electric shock, observe furnace work, if the sound "fullness" and even change the voice obvious at the time of the liquid iron, that iron has invaded the breakdown lining, lining and even in the treatment of molten iron in furnace as the case may be and does not continue to use. (3)电路工作声音明显变“闷”,电路外壳与其他接地体接触电源便停止工作时,说明铁液已击穿炉衬,应马上切断电源倒出炉内铁液,停止继续使用。(3) the circuit work voice became "boring", contact power supply circuit shell and other grounding system will stop working when the liquid iron has breakdown lining, should immediately cut off power supply of molten iron in pour out, stop to continue to use.新闻中心aoyouwl2017-02-10 08:34中频感应加热电炉常见故障分析及处理方法http://www.zhongpindianlu.net/news/738.htm低通滤波器(DL ) 回路阻抗变大, 使逆变端晶闸管工作不对称及载流子积蓄效应所积累的静电荷未能及时放掉, 因而开通、关断特性变坏。关断不良导致逆变失败, 形成过流。低通滤波器类似于一个小电抗器, 用6mm 2 漆包线绕制而成, 接在负载部分, 与倍压电容器相并联, 与炉子感..低通滤波器(DL ) 回路阻抗变大, 使逆变端晶闸管工作不对称及载流子积蓄效应所积累的静电荷未能及时放掉, 因而开通、关断特性变坏。关断不良导致逆变失败, 形成过流。低通滤波器类似于一个小电抗器, 用6mm 2 漆包线绕制而成, 接在负载部分, 与倍压电容器相并联, 与炉子感应圈相连通。作为当逆变端工作不对称时泄放晶闸管积累的静电电荷的通路。它与负载回路的连接导线, 其截面应是10mm 2 以上的铜线, 长度愈短愈好, 以减少泄放回路的阻抗, 保证静电电荷以一定的速率放掉, 确保逆变成功。有时静电电荷形成的电流很大, 会使低通滤波器严重发热以致烧坏。过流保护板中起保护作用的晶闸管特性变坏时, 其灵敏度增加, 当启动电流未达到过流整定值时便触发导通, 发出过流信号去封锁控制电源, 使逆变失败。Low pass filter (DL) circuit impedance change, make the thyristor inverter side work asymmetric effect and carrier savings accumulated static charges failed to put off, so open, shut off the bad. Shut off the bad cause the failure of inverter, form flow. Low pass filter is similar to a small reactor, with 6 mm 2 enameled wire winding and become, in part load, and shunt capacitor, pressure of The Times in connecting with induction coil, furnace. As when the inverter side work asymmetric discharge path of thyristor accumulation of electrostatic charge. It is connected to the load circuit conductor, its cross section should be more than 10 mm 2 copper wire, length is very short time, in order to reduce the impedance of the discharge circuit, ensure release the electrostatic charges at a certain rate, and to ensure the success of the inverter. Sometimes the formation of electrostatic charge current is very big, can make a low pass filter severe fever that burn out. Over-current protection board in the protective characteristics of thyristor go bad, the sensitivity increases, when the current is not triggered when it reaches the set values for the flow conduction, signal flow to blockade control power supply, inverter failed. 对角线桥臂的逆变管有一臂因没有触发脉冲而不导通。这样, 开通的管子就关不断, 此时功率因数很低, 启动电流很大, 即产生过流保护动作。The inverter tube has a diagonal line bridge arm arm for not trigger pulse without conduction. In this way, the opening of the tube shut up continuously, the low power factor, the starting current is large, the over-current protection action.新闻中心aywl2017-01-17 06:46中频电炉http://www.zhongpindianlu.net/news/737.htm1、定期清除电源柜内积尘1, regular removal of power dust contained in the cabinet 尤其是可控硅管芯外部,要用酒精擦除干净。运行中的变频装置一般都有专用机房,但实际作业环境并不理想在熔炼锻压工序,粉尘很大震动强烈。在透热淬火工序,装置厂靠近酸洗磷化等作业..1、定期清除电源柜内积尘1, regular removal of power dust contained in the cabinet 尤其是可控硅管芯外部,要用酒精擦除干净。运行中的变频装置一般都有专用机房,但实际作业环境并不理想在熔炼锻压工序,粉尘很大震动强烈。在透热淬火工序,装置厂靠近酸洗磷化等作业设备,有较多腐蚀性气体,这些都会对中频电炉相关装置的元件起到破坏作用,降低装置的绝缘强度在积尘较多时,往往会发生元件表面放电现象,因此必须注意经常清洗工作,防止故障发生;Especially the silicon controlled rectifier tube core is external, want to use alcohol to wipe clean. Operation of variable frequency device generally has special room, but the actual work environment is not ideal in the forging process of smelting and dust vibrate strongly. In heating quenching process, the device factory near the work equipment, such as pickling phosphating more corrosive gas, these will be for the intermediate frequency electric furnace related device components damage effect, decreases the insulation strength of the device are too many in the dust, the components surface discharge phenomenon can occur, so must pay attention to often clean work, prevent failure; 2、定期检查水管接头扎结是否牢靠2, regularly check the pipe joint tie is strong 使用自来水井水作为中频电炉装置的冷却水源时,易积存水垢,影响冷却效果。在塑料水管老化产生裂纹时,应及时更换装置。在夏天运行时采用自来水井冷却往往容易发生凝露现象,应该考虑使用循环水系统,凝露严重时应该立即停止运行;Use tap water Wells as the intermediate frequency electric furnace equipment, the cooling water, easy to stockpile scale, affect the cooling effect. In the plastic conduit ageing crack, should timely replacement device. Runtime USES tap water Wells in summer cooling condensation occur easily, should consider the use of circulating water system, lon serious when should immediately stop running; 3、定期更换或清洗中频电炉相关设备的关键部件3, regular replacement or cleaning medium frequency electric furnace key components of the related equipment 4、定期对装置进行检修4, for device maintenance on a regular basis 对装置各部件的螺栓和紧固接触器继电器的触头要进行定期检查,若出现松动或接触不良现象,均应及时修理更换,不能勉强使用,防止引起重大事故。Every parts of device bolt fastening contactor and relay contactor to conduct regular inspection, if appear, loosening or poor contact, shall be promptly repaired change, can not be forced to use, to prevent major accidents. 5、定期检查负载的接线是否良好,绝缘是否可靠。5, check the wiring of the load are in good condition and are reliable. 透热感应圈内积存的氧化皮要及时清理;隔热炉衬有裂纹要及时跟换;熔炼炉在更新炉衬后,应注意检查;绝缘变频装置的负载都设在工作现场,故障比较高,而往往被人忽视,因此,加强对负载的维护,防止故障波及变频电源是保证装置正常运行的重要一环。Heat-sensitive circles through the accumulation of scale should be clear in time; Heat insulation lining crack to follow change in time; Melting furnace after the update lining, inspection should be paid attention to; Insulation of variable frequency device load in work site, the fault is higher, but often neglected, therefore, to strengthen the maintenance of the load, to prevent the failure affected variable frequency power supply is an important link to ensure normal operation of the plant.新闻中心aywl2017-01-14 07:21中频电源柜构成http://www.zhongpindianlu.net/news/736.htm中频电源柜构成:主开关,整流可控硅,逆变可控硅,主控制板,平波电抗器。Medium frequency power supply cabinet: the main switch, rectifier thyristor, thyristor inverter, the main control board, flat wave reactor. 主控制板的重要性:相当于人的大脑。目前采..中频电源柜构成:主开关,整流可控硅,逆变可控硅,主控制板,平波电抗器。Medium frequency power supply cabinet: the main switch, rectifier thyristor, thyristor inverter, the main control board, flat wave reactor. 主控制板的重要性:相当于人的大脑。目前采用最广泛的是恒功率主控制板,有波峰焊和手工焊两种工艺,波峰焊工艺稳定,故障率低。The importance of the main control board: the equivalent of the human brain. The most widely used is a main control board, constant power has two kinds of wave crest welding and manual welding process, wave soldering process stability, low failure rate. 炉体部分:普通的采用铝壳感应炉,稍好的不锈钢壳感应炉,好一些的采用液压磁轭钢壳感应炉。倾炉方式分减速机倾炉和液压倾炉两种。Furnace parts: ordinary aluminum shell induction furnace, induction furnace, a good stainless steel shell better using hydraulic yoke steel shell induction furnace. Reducer tilting furnace turndown way points and two hydraulic tilting furnace. 工频供电系统:供电变压器,低压开关柜。Power frequency power supply system: power supply transformer, low voltage switchgear. 可控硅:可控硅是中频电源的核心,它的准确使用对设施的运行至关重要。一台设施一年损坏三五只可控硅尚属正常,如果经常烧硅,电炉停摆,影响出产,就要引起警觉了。可控硅的工作电流从几百安到几千安,电压通常在一两千伏,良好的主控板保护和良好的水冷条件是必备的。Thyristor, thyristor is the core of the medium frequency power supply, it is very important for the accurate use of facilities operation. A facilities damaged a year SanWuZhi SCR is normal, if often burn silicon furnace lockout, influence produced, is about to cause alarm. The working current of thyristor from several hundred to several thousand Ann Ann, usually in a couple of kv voltage, good master plate protection and good water conditions is essential. 可控硅的超负荷特性:可控硅的损坏称为击穿。在正常的水冷条件下,电流超负荷能力可达110%以上;无电压超负荷能力,就是说,硅在超压情况下,是肯定损坏的。再考虑到浪涌电压,厂家在制造设施时,往往都按工作电压的3-4倍值来选择硅元件。SCR overload characteristics: the damage of the silicon controlled is called the breakdown. Under normal water condition, the current overload capacity can reach more than 110%; No voltage overload ability, that is to say, the silicon in overpressure situation, is certainly damage. Again considering the surge voltage, manufacturer is in manufacturing facilities, usually 3 to 4 times according to the working voltage values to select silicon components.新闻中心aywl2017-01-14 07:15同型号的中频感应熔炼炉 为什么价格差这么多?http://www.zhongpindianlu.net/news/733.htm中频感应熔炼加热速度快,效率高烧损少闷热损失较小,车间温度相对较低,减少产生烟尘,节约能源,提高生产率,改善劳动条件,降低劳动强度,净化车间环境等方面效果显著。尤其是对于铸铁而言,感应熔炼炉有利于获得低硫铁液是冲天炉无法比拟的。铸造企业在选择中频熔炼..中频感应熔炼加热速度快,效率高烧损少闷热损失较小,车间温度相对较低,减少产生烟尘,节约能源,提高生产率,改善劳动条件,降低劳动强度,净化车间环境等方面效果显著。尤其是对于铸铁而言,感应熔炼炉有利于获得低硫铁液是冲天炉无法比拟的。铸造企业在选择中频熔炼炉时应根据变压器容量,产量要求,投资额度等作为选择标准,在选购设备时应注意以下事项。目前对于行业比较常用的SCR全桥并联逆变中频电源,变压器容量和电源的数值关系式为:变压器容量的数值= 电源功率的数值 x 1.2对于IGBT半桥串联逆变中频电源(俗称一拖二,一台熔炼一台保温,两台同时工作)变压器容量和电源功率的数值关系式为:变压器容量的数值= 电源功率的数值 x 1.1变压器为整流变压器为了减少谐波的干扰,尽量专机专用,即一台中频电源配置一台整流变压器。新闻中心aywl2016-12-19 09:41中频电炉炉衬寿命判断http://www.zhongpindianlu.net/news/2016/12/05/732/因为中频电炉炉衬材料价格比较昂贵,并且筑炉时间也比较长等因素,所以电炉炉衬使用时间能延长一次也是值得去争取的。然而有的时候为了多使用一次很可能发生炉衬被铁液穿透,后果很严重甚至危及设备和人身的安全。这就要求我们准确判断炉衬的寿命。经过多年经验,总结炉..因为中频电炉炉衬材料价格比较昂贵,并且筑炉时间也比较长等因素,所以电炉炉衬使用时间能延长一次也是值得去争取的。然而有的时候为了多使用一次很可能发生炉衬被铁液穿透,后果很严重甚至危及设备和人身的安全。这就要求我们准确判断炉衬的寿命。经过多年经验,总结炉衬寿命的判断方法如下:(1)根据以往经验推算炉衬寿命,在炉衬寿命快到时注意观察电炉频率表、电压表、电流表等,如果这些表的表针在正常工作情况下不断摆动,本次工作结束后炉衬寿命将尽不要再继续使用。(2)操作工用铁棍正常扒渣接触铁液有触电感时,注意观察电炉工作声音,如果声音 “发闷”甚至出铁液时声音变化明显,说明铁液已侵入炉衬甚至击穿炉衬,应根据情况处理炉内铁液并不再继续使用。(3)电路工作声音明显变“闷”,电路外壳与其他接地体接触电源便停止工作时,说明铁液已击穿炉衬,应马上切断电源倒出炉内铁液,停止继续使用。以上为实际生产中积累的经验,仅供业界同行参考。新闻中心不详2016-12-05 07:46铜排修复是指中频炉http://www.zhongpindianlu.net/news/2016/12/03/731/新闻中心不详2016-12-03 10:08中频电炉发热保温板的 优势讲解http://www.zhongpindianlu.net/news/2016/12/02/730/新闻中心不详2016-12-02 07:32中频电炉炉衬寿命判断的一点小经验http://www.zhongpindianlu.net/news/2016/11/18/729/因为中频电炉炉衬材料价格比较昂贵,并且筑炉时间也比较长等因素,所以电炉炉衬使用时间能延长一次也是值得去争取的。然而有的时候为了多使用一次很可能发生炉衬被铁液穿透,后果很严重甚至危及设备和人身的安全。这就要求我们准确判断炉衬的寿命。 经过多年经验,总..因为中频电炉炉衬材料价格比较昂贵,并且筑炉时间也比较长等因素,所以电炉炉衬使用时间能延长一次也是值得去争取的。然而有的时候为了多使用一次很可能发生炉衬被铁液穿透,后果很严重甚至危及设备和人身的安全。这就要求我们准确判断炉衬的寿命。 经过多年经验,总结炉衬寿命的判断方法如下: (1)根据以往经验推算炉衬寿命,在炉衬寿命快到时注意观察电炉频率表、电压表、电流表等,如果这些表的表针在正常工作情况下不断摆动,本次工作结束后炉衬寿命将尽不要再继续使用。 (2)操作工用铁棍正常扒渣接触铁液有触电感时,注意观察电炉工作声音,如果声音 “发闷”甚至出铁液时声音变化明显,说明铁液已侵入炉衬甚至击穿炉衬,应根据情况处理炉内铁液并不再继续使用。 (3)电路工作声音明显变“闷”,电路外壳与其他接地体接触电源便停止工作时,说明铁液已击穿炉衬,应马上切断电源倒出炉内铁液,停止继续使用。 以上为实际生产中积累的经验,仅供业界同行参考。新闻中心不详2016-11-18 08:14中频设备http://www.zhongpindianlu.net/news/2016/11/14/728/感应棒锻造炉 应用范围:中频感应棒加热炉应用于12以上钢、不锈钢、铜、钛合金等的规则棒料、方形料或其他毛坯料等的连续加热,即可用于圆棒整体加热,也可用于局部加热,如端部加热,中间部位加热等。 特点:采用IGBT功率器件和电流反相技术,输出振荡频率的范围可以从..感应棒锻造炉 应用范围:中频感应棒加热炉应用于12以上钢、不锈钢、铜、钛合金等的规则棒料、方形料或其他毛坯料等的连续加热,即可用于圆棒整体加热,也可用于局部加热,如端部加热,中间部位加热等。 特点:采用IGBT功率器件和电流反相技术,输出振荡频率的范围可以从2KHZ至20KHZ,串并联振荡电路。体积小,大大减少占用空间。效率高,满功率输出功率因数达95%以上,能效100%输出,在最大功率24小时连续工作能力。全显示输出功率,输出频率,输出电压和电流。简单的操作:操作可以在10分钟内学会。安装简单:输入三相AC,需配备循环冷却水新闻中心不详2016-11-14 08:27中频电炉维修中的“望、闻、问、切”http://www.zhongpindianlu.net/news/726.htm新闻中心aywl2016-10-17 01:33技术人员总结的中频电炉维修经验http://www.zhongpindianlu.net/news/725.htm一般情况下,可以把中频电源的故障按照故障现象分为完全不能起动和起动后不能正常工作两大类。作为一般的原则,当出现故障后,应在断电的情况下对整个系统作全面检查,它包括以下几个方面:(一)电源:用万用表测一下主电路开关(接触器)和控制保险丝后面是否有电,这..一般情况下,可以把中频电源的故障按照故障现象分为完全不能起动和起动后不能正常工作两大类。作为一般的原则,当出现故障后,应在断电的情况下对整个系统作全面检查,它包括以下几个方面:(一)电源:用万用表测一下主电路开关(接触器)和控制保险丝后面是否有电,这将排除这些元件断路的可能性。(二)整流器:整流器采用三相全控桥式整流电路,它包括六个快速熔断器、六个晶闸管、六个脉冲变压器和一个续流二极管。在快速熔断器上有一个红色的指示器,正常时指示器缩在外壳里边,当快熔烧断后它将弹出,有些快熔的指示器较紧,当快熔烧断后,它会卡在里面,所以为可靠起见,可以用万用表通断档测一下快熔,以判断它是否烧断。测量晶闸管的简单方法是用万用表电阻挡(200挡)测一下其阴极阳极、门极阴极电阻,测量时晶闸管不用取下来。正常情况下,阳极阴极间电阻应为无穷大,门极阴极电阻应在1050之间,过大或过小都表明这只晶闸管门极失效,它将不能被触发导通。脉冲变压器次边接在晶闸管上,原边接在主控板上,用万用表测量原边电阻约为50。续流二极管一般不容易出现故障,检查时用万用表二极管挡测其二端,正向时万用表显示结压降约有500mV,反向不通。(三)逆变器:逆变器包括四只快速晶闸管和四只脉冲变压器,可以按上述方法检查。(四)变压器:每个变压器的每个绕组都应该是通的,一般原边阻值约有几十欧姆,次极几欧姆。应该注意:中频电压互感器的原边与负载并联,所以其电阻值为零。(五)电容器:与负载并联的电热电容器可能被击穿,电容器一般分组安装在电容器架上,检查时应先确定被击穿电容器所在的组。断开每组电容器的汇流母排与主汇流排之间的连接点,测量每组电容器两个汇流排间的电阻,正常时应为无穷大。确认坏的组后,再断开每台电热电容器引至汇流排的软铜皮,逐台检查即可找到击穿的电容器。每台电热电容器由四个芯子组成,外壳为一极,另一极分别通过四个绝缘子引到端盖上,一般只会有一个芯子被击穿,跳开这个绝缘子上的引线,这台电容器可以继续使用,其容量是原来的3/4。电容器的另一个故障是漏油,一般不影响使用,但要注意防火。安装电容器的角钢与电容器架是绝缘的,如果绝缘击穿将使主回路接地,测量电容器外壳引线和电容器架之间的电阻,可以判断这部分的绝缘状况。(六)水冷电缆:水冷电缆的作用是连接中频电源和感应线圈,它是用每根直径0.6Ф0.8紫铜线绞合而成。对于500公斤电炉,电缆截面积为480平方毫米,对于250公斤电炉,电缆截面积采用300至400平方毫米。水冷电缆外胶管采用耐压5公斤的压力橡胶管,里面通以冷却水,它是负载回路的一部分,工作时受到拉力和扭力,与炉体一起倾动而发生曲折,因此时间长后容易在柔性连接处断裂开。水冷电缆断裂过程,一般是先断掉大部分后,在大功率运行时把未断小部分很快烧断,这时中频电源就会产生很高的过电压,如果过电压保护不可靠,就会烧坏晶闸管。水冷电缆断开后,中频电源无法启动工作。如不检查出原因而反复启动,就很可能烧坏中频电压互感器。检查故障时可用示波器,把示波器探头夹在负载两端,观察按启动按钮时有无衰减波形。确定电缆断芯时先把水冷电缆与电热电容器输出铜排脱开,用万用表电阻挡(200挡)测量电缆的电阻值,正常时电阻值为零,断开时为无穷大。用万用表测量时,应把炉体翻到倾倒位置,使水冷电缆掉起,这样使断处彻底脱离,才能正确判断是否断芯。通过以上几个方面的检查,一般能查出大部分的故障原因,接下来可以接通控制电源,作进一步的检查。中频电源主电路合闸有手动和自动两种。对于自动合闸的系统,应该先将电源线暂时断开,以确保主电路不会合上。接通控制电源后,可以作下面几个方面的检查。(1)将示波器探头接在整流晶闸管的门极和阴极上,示波器置于电源同步,按下启动按钮后即可看到触发脉冲波形,应为双脉冲,幅度应大于2V。按一下停止按钮,脉冲将立即消失。重复六次,将每个晶闸管都看一下,如果门极没有脉冲,可以将示波器的探头移到脉冲变压器的原边看一下,如果原边有脉冲而次边没有,说明脉冲变压器损坏,否则问题可能出在传输线或主控板上。(2)将示波器探头接在逆变晶闸管的门极和阴极上,示波器置于内同步,接通控制电源后可以看到逆变触发脉冲,它是一串尖脉冲,幅度应大于2V,通过示波器的时标读出脉冲周期,算出触发脉冲频率,正常时应比电源柜的标称频率高约20%,这个频率称为启动频率。按下启动按钮后,脉冲的间距加大,频率变低,正常时应比电源柜的标称频率低约40%,按一下停止按钮,脉冲频率立即跳回启动频率。通过上列检查,基本上能排除完全不能启动的故障。启动以后工作不正常,一般表现在下列几个方面:(1)整流器缺相:故障表现为工作时声音不正常,最大输出电压升不到额定值,且电源柜怪叫声变大,这时可以调低输出电压在200V左右,用示波器观察整流器的输出电压波形(示波器应置于电源同步),正常时输入电压波形每周期有六个波形,缺相时会缺少二个,如图2所示。这一故障一般是由于整流器某只晶闸管没有触发脉冲或触发不导通引起的,这时应先用示波器看一下六个整流晶闸管的门极脉冲,如果有的话,关机后用万用表200档测量一下各个门极电阻,将不通或者门极电阻特别大的那只晶闸管换掉即可。(2)逆变器三桥臂工作:故障表现为输出电流特别大,空炉时也一样,且电源柜工作时声音很沉重,启动后把功率旋钮调到最小位置,会发现中频输出电压比正常时高。用示波器依次观察四个逆变晶闸管的阳极阴极之间的电压波形,正常时每一只的波形都如图3所示。如果三桥臂工作,可以看到逆变器中有相邻的二只晶闸管的波形正常,另外相邻的二只有一只没有波形,另一只为正弦波,如图4所示,KK2触发不通,其阳极阴极之间的波形就是正弦波;同时KK2不导通会导致KK1无法关断,所以KK1二端就没有波形。(3)感应线圈故障:感应线圈是中频电源的负载,它采用壁厚3至5毫米的方形紫铜管制成。它的常见故障有以下几种:感应线圈漏水,这可能引起线圈匝间打火,必须及时补焊才能运行。钢水粘在感应线圈上,钢渣发热、发红,会引起铜管烧穿,必须及时清除干净。感应线圈匝间短路,这类故障在小型中频感应炉上特别容易发生,因为炉子小,在工作时受热应力作用而变形,导致匝间短路,故障表现为电流较大,工作频率比平常时高。新闻中心aywl2016-10-09 08:33六步迅速定位中频炉故障,维修中频电炉如此容易http://www.zhongpindianlu.net/news/724.htm晶闸管中频感应加热电源是利用晶闸管将三相工频交流电能变换成几百或几千赫兹的单相交流电能。具有控制方便、效率高、运行可靠、劳动强度低的特点,广泛用于铸钢、不锈钢或合金钢的冶炼、真空冶炼、锻件的加热和钢管的弯曲、挤压成型、工件的预热、钢件表面淬火、退火热..晶闸管中频感应加热电源是利用晶闸管将三相工频交流电能变换成几百或几千赫兹的单相交流电能。具有控制方便、效率高、运行可靠、劳动强度低的特点,广泛用于铸钢、不锈钢或合金钢的冶炼、真空冶炼、锻件的加热和钢管的弯曲、挤压成型、工件的预热、钢件表面淬火、退火热处理、金属零件的焊接、粉末冶金、输送高温工质的管道加热、晶体的生长等不同场合。在我厂,中频电源装置主要用于铸钢、不锈钢和青铜等的冶炼。 如何保证中频线圈在高温,潮湿等恶劣条件下的优良绝缘性能,并且保证施工方便,线圈美观度高,请选择APC-H+高温抗弧绝缘磁漆,高效绝缘,每毫米厚涂层抗电压40000V,有效防止电炉打火,涂层美观度高。优美的线圈作品欣赏。 中频电源的工作原理为:采用三相桥式全控整流电路将交流电整流为直流电,经电抗器平波后,成为一个恒定的直流电流源,再经单相逆变桥,把直流电流逆变成一定频率(一般为1000至8000Hz)的单相中频电流。负载由感应线圈和补偿电容器组成,连接成并联谐振电路。 一般情况下,可以把中频电源的故障按照故障现象分为完全不能起动和起动后不能正常工作两大类。作为一般的原则,当出现故障后,应在断电的情况下对整个系统作全面检查,它包括以下几个方面: (一)电源:用万用表测一下主电路开关(接触器)和控制保险丝后面是否有电,这将排除这些元件断路的可能性。 (二)整流器:整流器采用三相全控桥式整流电路,它包括六个快速熔断器、六个晶闸管、六个脉冲变压器和一个续流二极管。在快速熔断器上有一个红色的指示器,正常时指示器缩在外壳里边,当快熔烧断后它将弹出,有些快熔的指示器较紧,当快熔烧断后,它会卡在里面,所以为可靠起见,可以用万用表通断档测一下快熔,以判断它是否烧断。 测量晶闸管的简单方法是用万用表电阻挡(200挡)测一下其阴极阳极、门极阴极电阻,测量时晶闸管不用取下来。正常情况下,阳极阴极间电阻应为无穷大,门极阴极电阻应在1050之间,过大或过小都表明这只晶闸管门极失效,它将不能被触发导通。 脉冲变压器次边接在晶闸管上,原边接在主控板上,用万用表测量原边电阻约为50。续流二极管一般不容易出现故障,检查时用万用表二极管挡测其二端,正向时万用表显示结压降约有500mV,反向不通。 (三)逆变器:逆变器包括四只快速晶闸管和四只脉冲变压器,可以按上述方法检查。 (四)变压器:每个变压器的每个绕组都应该是通的,一般原边阻值约有几十欧姆,次极几欧姆。应该注意:中频电压互感器的原边与负载并联,所以其电阻值为零。 (五)电容器:与负载并联的电热电容器可能被击穿,电容器一般分组安装在电容器架上,检查时应先确定被击穿电容器所在的组。断开每组电容器的汇流母排与主汇流排之间的连接点,测量每组电容器两个汇流排间的电阻,正常时应为无穷大。确认坏的组后,再断开每台电热电容器引至汇流排的软铜皮,逐台检查即可找到击穿的电容器。每台电热电容器由四个芯子组成,外壳为一极,另一极分别通过四个绝缘子引到端盖上,一般只会有一个芯子被击穿,跳开这个绝缘子上的引线,这台电容器可以继续使用,其容量是原来的3/4。电容器的另一个故障是漏油,一般不影响使用,但要注意防火。 安装电容器的角钢与电容器架是绝缘的,如果绝缘击穿将使主回路接地,测量电容器外壳引线和电容器架之间的电阻,可以判断这部分的绝缘状况。 (六)水冷电缆:水冷电缆的作用是连接中频电源和感应线圈,它是用每根直径0.6Ф0.8紫铜线绞合而成。对于500公斤电炉,电缆截面积为480平方毫米,对于250公斤电炉,电缆截面积采用300至400平方毫米。水冷电缆外胶管采用耐压5公斤的压力橡胶管,里面通以冷却水,它是负载回路的一部分,工作时受到拉力和扭力,与炉体一起倾动而发生曲折,因此时间长后容易在柔性连接处断裂开。水冷电缆断裂过程,一般是先断掉大部分后,在大功率运行时把未断小部分很快烧断,这时中频电源就会产生很高的过电压,如果过电压保护不可靠,就会烧坏晶闸管。水冷电缆断开后,中频电源无法启动工作。如不检查出原因而反复启动,就很可能烧坏中频电压互感器。检查故障时可用示波器,把示波器探头夹在负载两端,观察按启动按钮时有无衰减波形。确定电缆断芯时先把水冷电缆与电热电容器输出铜排脱开,用万用表电阻挡(200挡)测量电缆的电阻值,正常时电阻值为零,断开时为无穷大。用万用表测量时,应把炉体翻到倾倒位置,使水冷电缆掉起,这样使断处彻底脱离,才能正确判断是否断芯。 通过以上几个方面的检查,一般能查出大部分的故障原因,接下来可以接通控制电源,作进一步的检查。中频电源主电路合闸有手动和自动两种。对于自动合闸的系统,应该先将电源线暂时断开,以确保主电路不会合上。接通控制电源后,可以作下面几个方面的检查。 (1)将示波器探头接在整流晶闸管的门极和阴极上,示波器置于电源同步,按下启动按钮后即可看到触发脉冲波形,应为双脉冲,幅度应大于2V。按一下停止按钮,脉冲将立即消失。重复六次,将每个晶闸管都看一下,如果门极没有脉冲,可以将示波器的探头移到脉冲变压器的原边看一下,如果原边有脉冲而次边没有,说明脉冲变压器损坏,否则问题可能出在传输线或主控板上。 (2)将示波器探头接在逆变晶闸管的门极和阴极上,示波器置于内同步,接通控制电源后可以看到逆变触发脉冲,它是一串尖脉冲,幅度应大于2V,通过示波器的时标读出脉冲周期,算出触发脉冲频率,正常时应比电源柜的标称频率高约20%,这个频率称为启动频率。按下启动按钮后,脉冲的间距加大,频率变低,正常时应比电源柜的标称频率低约40%,按一下停止按钮,脉冲频率立即跳回启动频率。通过上列检查,基本上能排除完全不能启动的故障。启动以后工作不正常,一般表现在下列几个方面: (1)整流器缺相:故障表现为工作时声音不正常,最大输出电压升不到额定值,且电源柜怪叫声变大,这时可以调低输出电压在200V左右,用示波器观察整流器的输出电压波形(示波器应置于电源同步),正常时输入电压波形每周期有六个波形,缺相时会缺少二个,如图2所示。这一故障一般是由于整流器某只晶闸管没有触发脉冲或触发不导通引起的,这时应先用示波器看一下六个整流晶闸管的门极脉冲,如果有的话,关机后用万用表200档测量一下各个门极电阻,将不通或者门极电阻特别大的那只晶闸管换掉即可。 (2)逆变器三桥臂工作:故障表现为输出电流特别大,空炉时也一样,且电源柜工作时声音很沉重,启动后把功率旋钮调到最小位置,会发现中频输出电压比正常时高。用示波器依次观察四个逆变晶闸管的阳极阴极之间的电压波形,正常时每一只的波形都如图3所示。如果三桥臂工作,可以看到逆变器中有相邻的二只晶闸管的波形正常,另外相邻的二只有一只没有波形,另一只为正弦波,如图4所示,KK2触发不通,其阳极阴极之间的波形就是正弦波;同时KK2不导通会导致KK1无法关断,所以KK1二端就没有波形。 (3)感应线圈故障:感应线圈是中频电源的负载,它采用壁厚3至5毫米的方形紫铜管制成。它的常见故障有以下几种: 感应线圈漏水,这可能引起线圈匝间打火,必须及时补焊才能运行。 钢水粘在感应线圈上,钢渣发热、发红,会引起铜管烧穿,必须及时清除干净。 感应线圈匝间短路,这类故障在小型中频感应炉上特别容易发生,因为炉子小,在工作时受热应力作用而变形,导致匝间短路,故障表现为电流较大,工作频率比平常时高。 综上所述,为了能采用正确的方法进行中频电源的故障维修,就必须熟悉中频电源常见故障的特点及原因,才能少走弯路,节省时间,尽快的将故障排除,恢复中频电源的正常运行,从而保证生产的顺利进行。新闻中心aywl2016-09-07 11:45中频电源系统维护,检测http://www.zhongpindianlu.net/news/722.htm一、中频电源系统维护 系统维护分为三大部分:水路系统,液压系统和电气系统,重点是电气系统的维护。 实践证明:中频电源系统绝大多数故障的发生与水路有直接关系。因此,水路要求水质、水压、水温、流量务必达到设备规定要求。 电气系统的维护: 电气系统必须..一、中频电源系统维护 系统维护分为三大部分:水路系统,液压系统和电气系统,重点是电气系统的维护。 实践证明:中频电源系统绝大多数故障的发生与水路有直接关系。因此,水路要求水质、水压、水温、流量务必达到设备规定要求。 电气系统的维护: 电气系统必须定期检修,由于主回路连接部分容易发热,从而引起打火,出现许多莫名故障。二、中频电源系统常见故障的检测方法(只介绍电气系统) ㈠.检测常用仪器仪表: 数字式万用表,绝缘摇表,电感电容表,示波器(专业人员用)。 ㈡.系统主回路方框原理图: 断路器 三相全波整流和滤波 逆变和中频负载三相交流输入 ㈢.系统检测: 系统检测分四部分. 1.控制系统的检测(断路器及其控制部分)这部分检测比较简单.一般电工根据断路器说明书和系统主回路图中的控制原理图即可检测. 检测结果应为断路器操作正常,门板按钮和指示灯正常. 2.整流部分的检测 首先,系统必须通水. 将主回路从滤波电抗器前级断开,在三相全波整流输出两端接一个500,500W的电阻性负载(常用3个或4个300W灯泡串联)。开机后,直流电压表应能指示在大约1.35Ul位置(Ul:交流输入线电压)。 3.逆变和中频负载检测 控制系统和整流部分正常后,接入逆变和中频负载,若不能正常开机启动,先检查主电路板接线,对掉114,115后重新启动,若无法启动须更换主电路板,若还不能正常开机,应为逆变和中频负载有问题。其检测须逐个元件检测。㈣.主要元器件的检测 1.可控硅的检测方法 用数字式万用表200K挡测可控硅正反向电阻,应在10K~100K之间(阻值受水路影响)。 用数字式万用表200挡测可控硅门极电阻,应在10~20之间。 2.电容器的检测方法 拆开电容器的连接铜排。用绝缘摇表测试各电容器每个柱子是否充放电,正常应能充放电。注意:选用的绝缘摇表电压不能大于电容器额定电压。用电感电容表测各电容器每个柱子容量值是否正常。 3.炉子的检测方法 观察匝间是否短路:线圈对保护地绝缘是否良好。 4.电路板检测须专业人员用示波器检测,怀疑其有问题时,可直接更换。㈤.中频感应加热电源常见故障与维修 中频电源广范应用于熔炼透热淬火焊接等领域,不同的应用领域对中频电源有不同的要求,因此中频电源的控制电路和主电路有不同的结构形式,只有在熟练掌握这些电路的基本工作原理和功率器件的基本特性的基础上,才能快速准确地分析判断故障原因采取有效的措施排除故障。在此仅对典型电路和常见故障进行探讨。 1、开机设备不能正常起动 1.1故障现象:起动时直流电流大,直流电压和中频电压低,设备声音沉闷过流保护。 分析处理:逆变桥有一桥臂的晶闸管可能短路或开路造成逆变桥三臂桥运行。用示波器分别观察逆变桥的四个桥臂上的晶闸管管压降波形,若有一桥臂上的晶闸管的管压降波形为一线,该晶闸管已穿通;若为正弦波,该晶闸管未导通,更换已穿晶闸管,并查找晶闸管未导通的原因。 1.2 故障现象 起动时直流电流大,直流电压低中频电压不能正常建立。 分析处理 :补偿电容短路.断开电容,查找短路电容,更换短路电容。 1.3 故障现象 重载冷炉起动时,各电参数和声音都正常,但功率升不上去,过流保护。 分析处理:(1)逆变换流角太小。用示波器观看逆变晶闸管的换流角,把换流角调到合适值; (2) 炉体绝缘阻值低或短路,用兆欧表检测炉体阻值。排除炉体的短路点; (3) 炉料钢铁相对感应圈阻值低,用兆欧表检测炉料相对感应圈的阻值;若阻值低重新筑炉。 1.4 故障现象:零电压扫频起动电路不好起动。 分析处理: (1) 电流负反馈量调整得不合适,检查电流互感器同名端: (2) 信号线是否过长过细; (3) 中频变压器和隔离变压器是否损坏,特别要注意变压器匝间短路,重新调整电流负反馈量,更换已损坏的部件。 1.5 故障现象零电压它激扫频起动电路不好起动。 分析处理: (1)扫频起始频率选择不合适,重新选择起始频率; (2)扫频电路有故障,用示波器观察扫频电路的波形和频率,排除扫频电路故障。 1.6 故障现象:起动时各电参数和声音都正常,升功率时电流突然没有,电压到额定值过压过流保护。 分析处理:负载开路检查负载铜排接头和水冷电缆。 2.设备能起动但工作状态不对 2.1 故障现象:设备空载能起动,但直流电压达不到额定值,直流平波电抗器有冲击声并伴随抖动。 分析处理: 关掉逆变控制电源,在整流桥输出端上接上假负载,用示波器观察整流桥的输出波形,可看到整流桥输出缺相波形,缺相的原因可能是: (1)整流触发脉冲丢失; (2)触发脉冲的幅值不够宽度太窄,导致触发功率不够,造成晶闸管时通时不通; (3)双脉冲触发电路的脉冲时序不对或脉冲丢失; (4)晶闸管的控制极开路/短路/接触不良。 2.2 故障现象: 设备能正常顺利起动,当功率升到某一值时过压或过流保护。 分析处理: 分两步查找故障原因: (1)先将设备空载运行,观察电压能否升到额定值;若电压不能升到额定值并且多次在电压某一值附近过流保护,这可能是补偿电容或晶闸管的耐压不够造成的,但也不排除是电路某部分打火造成的; (2) 电压能升到额定值,可将设备转入重载运行,观察电流值是否能达到额定值;若电流不能升到额定值,并且多次在电流某一值附近过流保护,这可能是大电流干扰,要特别注意中频大电流的电磁场对控制部分和信号线的干扰。 3. 设备正常运行时易出现的故障 3.1 故障现象:设备运行正常,但在正常过流保护动作时烧毁多只KP晶闸管和快熔。 分析处理: 过流保护时为了向电网释放平波电抗器的能量,整流桥由整流状态转到逆变状态,这时如果>120度;,就有可能造成有源逆变颠覆,烧毁多只晶闸管和快熔,开关跳闸,并伴随有巨大的电流短路爆炸声,对变压器产生较大的电流和电磁力冲击,严重时会损坏变压器。 3.2 故障现象:设备运行正常,但在高电压区内某点附近设备工作不稳定,直流电压表晃动,设备伴随有吱吱的声音,这种情况极容易造成逆变桥颠覆烧毁晶闸管。 分析处理: 这种故障较难排除,多发生于设备的某部件高压打火: (1)连接铜排接头螺丝松动造成打火; (2)断路器主接头氧化导致打火; (3)补偿电容接线桩螺丝松动,引起打火,补偿电容内部放电阻容吸收电容打火; (4)水冷散热器绝缘部分太脏或炭化对地打火; (5)炉体感应线圈对炉壳/炉 底板打火,炉体感应线圈匝间距太近,匝间打火或起弧。固定炉体感应线圈的绝缘柱因高温炭化放电打火。 (6)晶闸管内部打火。 3.3 故障现象:设备运行正常但不时地可听到尖锐的嘀嘀声,同时直流电压表有轻微地摆动。 分析处理: 用示波器观察逆变桥直流两端的电压波形,一个周波失败或不定周期短暂失败,并联谐振逆变电路短暂失败可自恢复周期性短暂,失败一般是逆变控制部分受到整流脉冲的干扰,非周期性短暂失败一般是由中频变压器匝间绝缘不良产生。 3.4 故障现象:设备正常运行一段时间后出现异常声音,电表读数晃动设备工作不稳定。 分析处理: 设备工作一段时间后出现异常声工作不稳定,主要是设备的电气元器件的热特性不好,可把设备的电气部分分为弱电和强电两部分,分别检测。先检测控制部分,可预防损坏主电路功率器件,在不合主电源开关的情况下,只接通控制部分的电源,待控制部分工作一段时间后,用示波器检测控制板的触发脉冲,看触发脉冲是否正常。 在确认控制部分没有问题的前提下,把设备开起来,待不正常现象出现后,用示波器观察每只晶闸管的管压降波形,找出热特性不好的晶闸管;若晶闸管的管压降波形都正常,这时就要注意其它电气部件是否有问题,要特别注意断路器、电容器、电抗器、铜排接点和主变压器。 3.5 故障现象:设备工作正常但功率上不去。 分析处理: 设备工作正常只能说明设备各部件完好,功率上不去,说明设备各参数调整不合适。影响设备功率上不去的主要原因有: (1)整流部分没调好,整流管未完全导通,直流电压没达到额定值影响功率输出; (2)中频电压值调得过高/过低影响功率输出; (3)截流截压值调节得不当使得功率输出低; (4)炉体与电源不配套严重影响功率输出; (5)补偿电容器配置得过多或过少都得不到电效率和热效率最佳的功率输出,即得不到最佳的经济功率输出; (6)输出回路的分布电感和谐振回路的附加电感过大,也影响最大功率输出。 3.6 故障现象:设备运行正常但在某功率段升降功率时,设备出现异常声音抖动,电气仪表指示摆动。 分析处理: 这种故障一般发生在功率给定电位器上,功率给定电位器某段不平滑跳动,造成设备工作不稳定严重时造成逆变颠覆烧毁晶闸管。 3.7 故障现象:设备运行正常但旁路电抗器发热烧毁。 分析处理: 造成旁路电抗器发热烧毁的主要原因有: (1)旁路电抗器自身质量不好; (2)逆变电路存在不对称运行,造成逆变电路不对称运行的主要原因来源于信号回路。 3.8 故障现象:设备运行正常经常,击穿补偿电容。 分析处理 故障原因: (1)中频电压和工作频率过高; (2)电容配置不够; (3)在电容升压电路中,串联电容与并联电容的容量相差太大,造成电压不均击穿电容; (3) 却不好击穿电容。 3.9 故障现象:设备运行正常但频繁过流。 分析处理: 设备运行时各电参数波形声音都正常,就是频繁过流。当出现这样的故障时要注意,是否是由于布线不当产生电磁干扰和线间寄生参数耦合干扰,如强电线与弱电线布在一起,工频线与中频线布在一起,信号线与强电线、中频线汇流排交织在一起等。 4. 直流平波电抗器 故障现象: 设备工作不稳定,电参数波动,设备有异常声音,频繁出现过流保护和烧毁快速晶闸管。 分析处理: 在中频电源维修中,直流平波电抗器故障属较难判断和处理的故障。直流平波电抗器易出现的故障有: (1)用户随意调整电抗器的气隙和线圈匝数,改变了电抗器的电感量,影响了电抗器的滤波功能,使输出的直流电流出现断续现象,导致逆变桥工作不稳定,逆变失败烧毁逆变晶闸管。随意调整电抗器的气隙和线圈匝数,在逆变桥直通短路时,会降低电抗器阻挡电流上升的能力,烧毁晶闸管.随意改变电抗器的电感量还会影响设备的起动性能; (2)电抗器线圈松动。电抗器的线圈若有松动,在设备工作时电磁力使线圈抖动,电感量突变,在轻载起动和小电流运行时易造成逆变失败; (3) 器线圈绝缘不好。对地短路或匝间短路,打火放电造成电抗器的电感量突跳和强电磁干扰,使设备工作不稳定。产生异常声音频繁,过流烧毁晶闸管,造成线圈绝缘层绝缘不好.短路的原因有:a. 冷却不好,温度过高导致绝缘层绝缘变差打火炭化;b. 电抗器线圈松动,线圈绝缘层与线圈绝缘层之间、线圈绝缘层与铁心之间,相对运动摩擦造成绝缘层损坏;c. 在处理电抗器线圈水垢时,把酸液渗透到线圈内,酸液腐蚀铜管并生成铜盐破坏绝缘层。 5. 晶闸管 5.1 故障现象:更换晶闸管后一开机就烧毁晶闸管。 分析处理: 设备出故障烧毁晶闸管,在更换新晶闸管后不要马上开机,首先应对设备进行系统检查排除故障,在确认设备无故障的情况下,再开机,否则就会出现一开机就烧毁晶闸管的现象。在压装新晶闸管时一定要注意压力均衡,否则就会造成晶闸管内部芯片机械损伤,导致晶闸管的耐压值大幅下降,出现一开机就烧毁晶闸管的现象。 5.2 故障现象:更换新晶闸管后开机正常,但工作一段时间又烧毁晶闸管。 分析处理 :发生此类故障的原因有: (1)控制部分的电气元器件热特性不好; (2)晶闸管与散热器安装错位; (3)散热器经多次使用或压装过小台面晶闸管,造成散热器台面中心下凹,导致散热器台面与晶闸管台面接触不良而烧毁晶闸管; (4) 热器水腔内水垢太厚导热不好造成元件过热烧掉; (5)快速晶闸管因散热不好温度升高,同时晶闸管的关断时间随着温度升高而增大,最终导致元件不能关断造成逆变颠覆,烧掉晶闸管; (6)晶闸管工作温度过高,门极参数降低抗干扰能力下降,易产生误触发损坏晶闸管和设备; (7)查阻容吸收电路是否完好。 以上只是中频电源系统常用的检测方法和常见故障,供用户参考。由于中频电源系统比较复杂,其故障现象是多种多样千奇百怪的,对具体故障要做具体分析。必要时,须专业人员现场检测维修中频电源维修人员必须要具备相当的电路理论基础知识和丰富的实践经验。新闻中心aywl2016-08-25 02:3610T中频电炉除尘器的工作原理及制作结构特点http://www.zhongpindianlu.net/news/721.htm10T中频电炉除尘器选用的是LCM型系列离线清灰气箱式脉冲袋除尘器,该除尘器是从美国富乐公司引进具有八十年代先进水平的高效率除收尘器。它综合分室反吹和喷吹脉冲清灰各类袋除尘器的优点,克服了分室反吹清灰强度不够,喷吹脉冲清灰和过滤同时进行的缺点,因而扩大了袋..10T中频电炉除尘器选用的是LCM型系列离线清灰气箱式脉冲袋除尘器,该除尘器是从美国富乐公司引进具有八十年代先进水平的高效率除收尘器。它综合分室反吹和喷吹脉冲清灰各类袋除尘器的优点,克服了分室反吹清灰强度不够,喷吹脉冲清灰和过滤同时进行的缺点,因而扩大了袋除尘器的应用范围,由于这种类型的除尘器的结构有其特点,所以提高了收尘效率,延长了滤袋的使用寿命。本系列产品广泛用于冶金、化工、机械、水泥和民用锅炉等废气的收尘系统。除尘器由壳体、灰斗、排灰装置、支架和脉冲清灰系统等部分所组成。当含尘气体从进风口进入除尘器后,首先碰到进出风口中间的斜隔板,气流便转向流入灰斗,同时气流速度变慢,由于惯性作用,使气体中粗颗粒粉尘直接落入灰斗,起到预收尘的作用。进入灰斗的气流随后折而向上通过内部装有金属骨架的滤袋,粉尘被捕集在滤袋的外表面,净化后的气体进入滤袋上部的清洁室,汇集到出风管排出。LCM型除尘器的进风口设在灰斗上。气流进入灰斗后首先碰上进风管端部的挡板,其作用与上述原理相同。壳体用隔板分成若干个独立的收尘室,按照给定的时间间隔对每个收尘室轮流进行清灰。每个收尘室装有一个提升阀,清灰时提升阀关闭,切断通过该收尘室的过滤气流,随即脉冲阀开启,向滤袋内喷入高压空气,以清除滤袋外表面上的粉尘。各收尘室的脉冲喷冲吹宽度和清灰周期,由专用的清灰程序控制器自动连续进行。1.10T中频电炉除尘器工作原理除尘器由灰门中箱体、上箱体等部分组成,中箱体为分室或分组结构。工作时,含尘气体由尘气集合管进入灰门,粗尘粒直接落入灰门底部,细尘粒随气流转折向上进入中箱体,灰尘附积在滤袋外表面,过滤后的气体进入净气集合管以风机排到大气。清灰过程是先切断该组的净气出口通道,使该组的布袋处于无气流通过的状态,然后开启脉冲阀用压缩空气进行脉冲清灰,切断阀关闭时间足以保证在喷吹后剥离的灰尘沉降到灰门,避免了粉尘在脱离滤袋表面后又随气体再附集到相邻滤袋表面的现象,使滤袋清灰彻底。并由可编程控制柜对切断阀、脉冲阀及卸灰阀等进行全自动控制。2.10T中频电炉除尘器特点:① 除尘器采用淹没式脉冲阀,管道阻力小,使用寿命长。② 由于离线喷吹清灰,喷吹一次就可达到彻底清灰的目的。所以清灰周期由常规型的3-5分钟,延长到20-30分钟,因此,降低清灰能耗,压气耗量仅为常规型的十分之一左右,同时,滤袋与脉冲阀膜片的疲劳磨损也相应减少,从而成倍地提高滤袋与阀片的寿命。③ 滤袋袋口采用弹簧涨圈,密闭性能好,牢固可靠。④ 采用上部抽袋方式,换袋时在抽出骨架后,脏袋投入箱体下部灰门,由入孔处取出,改善换袋操作条件。⑤ 进出口集合管布置紧凑,气流阻力小。3.滤袋保证滤袋寿命脉的四大要素:(1)选用合适的滤料;(2)设计合理的结构;(3)精湛的缝制技术;(4)正确的使用方法。A选型滤料使用国内外常规滤料氟镁斯针刺毡滤料,其特点是耐高温(使用温度120~280℃)、变形小,寿命1~2年。B制作:滤袋的纵向缝线必须牢固、平直且不得少于三条;滤袋袋口的环状缝线必须牢固且不得少于二条;滤袋防瘪环的环状缝线必须牢固且每边不得少于二条;滤袋袋底的环状缝线允许单线,但必须缝制二圈以上;布袋下料长度尺寸偏差为10mm,布袋的周边缝制针码要均匀,袋纵向针码不得小于15针/10cm,横向针码不少于12针/10cm;缝制好的布袋不得有漏洞,损伤缺陷;直径大于200mm,长度大于5000mm的布袋应做拉伸试验,其伸长量应符合要求。缝线的针距、缝合宽度应符合GB12625-90标准并满足: a)不允许连续跳线且1m缝线内跳线不超过1针、1线、1处; b)无浮线; c)不允许连续掉道且1m内掉道不超过1处。4、骨架骨架在除尘器中起着支撑布袋的作用,所以要求骨架的钢性、直度都非常好。我们提供的骨架在整体制作工艺上非常严格,钢丝全部采用冷拔丝材料,多触点焊接工艺,一次成形,表面防腐、镀锌,一项项严格的加工工艺确保了骨架在长期运行过程中不变形、不锈蚀。5、高温控制措施为防止烟气温度在瞬间超温,在烟气进入除尘器前设温控阀,当烟气温度升至界定温度时,管道上的热电偶传感给电控箱,从而控制温控阀打开混入环境空气进行降温,当温度降至界定温度下限时,电控箱控制温控阀关闭。新闻中心aywl2016-08-13 11:20