中频电炉五大保养要点
[来源:原创] [作者:aywl] [日期:17-03-04] [浏览次数:]
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. 可控硅的准确安装压力:150-200KG/cm2。在设施出厂时,一般是用油压机压装。人工用普通的扳手用最大力气也达不到该数值,所以人工装压时,不必要担心硅会被压坏;压松了,反而会由于散热不良而烧硅。 Silicon controlled accurately to install pressure: 150-200 kg/cm2. When the facility factory, are generally use hydraulic press pressure equipment. Artificial with ordinary wrench with maximum strength also amounted to less than the value, so when people work pressure, unnecessary worry about silicon will be crushed; Pressure is loose, it will burn silicon due to poor heat dissipation.   可控硅的散热器结构:水冷空腔+多铜柱支撑。如果循环水太硬,就会在水腔内部结垢,造成散热不良;如果水腔内进入树叶等杂物,也会造成水流不畅。 The radiator structure of SCR: water-cooled cavity + more copper column support. If circulating water is too hard, you'll cavity internal scaling in the water, and the heat harmful; If the water cavity into the debris such as leaves, also can cause water not free. 循环水系统的重要性:中频炉设施是一种大功率的电力电子装置,可控硅、平波电抗器、电容、感应圈、水冷电缆等重要部件都需要水冷却,众多冷却管的内径只有8mm左右。 The circulating water system: the importance of intermediate frequency furnace is a kind of high-power electric power electronic device, SCR, flat wave reactor, capacitor, induction coil, water-cooling cable and other important components are need water cooling, many of the cooling pipe diameter is only about 8 mm.   功率小一些的电炉,只采用循环水池就可以了。功率大一些的电炉,就要采取循环水池加玻璃钢冷却塔的方式,并要求电炉和电柜循环水分开,因为电炉出水温度在55℃左右,电炉出水温度在40℃左右,温差十几度以上。条件好些的企业,或者本地水质很硬的情况,最好采用纯水(蒸馏水)循环系统。目前纯水循环系统产品分全封闭式(铜管机芯)和换热器式两种,前者占地面积小,但造价高,后者占地面积大,但造价低,两者都能达到纯水封闭循环冷却的目的。 Power smaller electric furnace, using circular pool. Larger electric power, we should adopt the method of adding glass fiber reinforced plastic cooling tower circulating cistern, and demanded that the electric furnace and electric cabinet circulating water separate, because electric furnace outlet temperature at about 55 ℃, electric furnace water temperature about 40 ℃, the temperature difference between ten more than a few degrees. Better the conditions of enterprise, or the circumstance of local water quality is very hard, had better use pure water (distilled water) system. The pure water circulation systems and products totally enclosed (brass movement) and heat exchanger type two kinds, the former cover an area of an area small, but the cost is high, which covers an area of big, but the cost is low, both can achieve the goal of pure water closed circulation cooling.   众多企业不重视水系统的配置,循环水温度过高,系统进入杂物,造成结垢和堵水现象,出现烧硅、烧电抗器故障,造成不必要的损失。 Many enterprises do not take the configuration of water system, circulating water temperature is too high, the system enters the sundry, scale and water plugging phenomenon, the silicon burning, burning reactor, fault cause unnecessary losses. 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.
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