电动高压闸阀属于强制密封式阀门，是由电动执行器和闸阀两大部分组成。广泛适用于石油、化工、火力发电厂等油品、水、蒸汽管路上作接通或截断管路中介质的启闭装置。

　　Electric high-pressure gate valve is a forced sealing valve, which is composed of two major parts: electric actuator and gate valve. It is widely used as an on-off device for connecting or cutting off the medium in the pipelines of oil, chemical, thermal power plants and other oil products, water and steam.

　　根据阀门损坏的情况，更换了阀门门杆及门杆螺纹套，对阀座及阀瓣密封面进行研磨修复，为了解决该缺陷，只有考虑现场对阀门进行修复，由于主蒸汽电动主汽门是单阀板楔形闸阀，那么要解决问题只有将阀瓣修配成与阀座相同的锥度。要进行修配，必须精确测量出锥度。

　　According to the damage situation of the valve, the valve stem and valve stem threaded sleeve are replaced, and the sealing surfaces of the valve seat and valve disc are ground and repaired. To solve this defect, only on-site repair of the valve can be considered. Since the main steam electric main steam valve is a single valve plate wedge gate valve, then to solve the problem, only the valve disc can be repaired to have the same taper as the valve seat. To carry out the repair, the taper must be accurately measured.

　　步骤 1：为了解决阀座与阀瓣的锥度测量问题，先制作出两个略大于阀瓣的闸板模型，然后垂吊于阀座接触面，中间用四根小铁棒撑开闸板模型使其完全与阀座接触，用电焊将四根小铁棒与两块模型均匀施焊牢固，待冷却后取出，用量角器测量出闸板模型的锥度。

　　Step 1: To solve the problem of measuring the taper of the valve seat and valve disc, first make two gate plate models slightly larger than the valve disc, then hang them vertically on the contact surface of the valve seat. Use four small iron rods to prop open the gate plate model in the middle to make it fully contact with the valve seat. Weld the four small iron rods and the two models evenly and firmly with electric welding. Take them out after cooling and measure the taper of the gate plate model with a protractor.

　　步骤 2：将阀瓣根据阀板模型的锥度进行车削，将车削好的阀瓣放入阀座内进行修配，修配时可采用红丹接触的方法；当锥度基本相同时，在阀瓣的内凹面也车一个相同的锥度面，用作密封面堆焊后车削的基准面。

　　Step 2: Turn the valve disc according to the taper of the valve plate model. Put the turned valve disc into the valve seat for repair. When repairing, the method of red lead contact can be used. When the taper is basically the same, turn a same taper surface on the concave surface of the valve disc, which is used as the reference surface for turning after surfacing of the sealing surface.

　　步骤 3：对阀瓣密封面进行堆焊。堆焊的焊条可根据阀门所使用的温度进行选择，阀门用于堆焊的焊条有半铁素体高铬钢和铬镍硅钼两大类，主要用于工作温度低于 600℃的高压阀门的密封面堆焊；或采用钴基硬质密封堆焊焊条：D802、D812。

　　Step 3: Surfacing on the sealing surface of the valve disc. The welding rods for surfacing can be selected according to the temperature used by the valve. There are two major types of welding rods for surfacing of valves: semi-ferritic high chromium steel and chromium-nickel-silicon-molybdenum. They are mainly used for surfacing the sealing surfaces of high-pressure valves with working temperatures lower than 600℃. Or use cobalt-based hard sealing surfacing welding rods: D802 and D812.