LW25-252型断路器气动阀体密封圈检修(检验)方法  

Repair(Test)Method of LW25-252 Circuit Breaker Pneumatic Valve Body Sealing Ring

作　　者：徐成西 耿向东[1] 南洋[1] 王旭晖[1] 夏博雅 刘育武 王昭斐 况广耀 XU Chengxi;GENG Xiangdong;NAN Yang;WANG Xuhui;XIA Boya;LIU Yuwu;WANG Zhaofei;KUANG Guangyao(State Grid Beijing Electric Power Company Maintenance Branch,Beijing Fengtai 100032,China)

机构地区：[1]国网北京市电力公司检修分公司,北京丰台100032

出　　处：《农村电气化》2024年第6期73-75,共3页Rural Electrification

摘　　要：某220 kV站内进口设备LW25-252型断路器为单台供气式气动机构,内部气动阀由于存在运行时间较长,密封圈老化导致出现气动阀频繁漏气。文章通过研究该站LW25-252型断路器中VA133、VA134型气动阀,经过对气动阀的拆接、工作原理分析以及各部位密封垫作用,确定阀体内活塞杆密封圈为气动阀漏气根源,根据阀体活塞杆结构研制专用工具供拆解、组装阀体,并进一步模拟集中供气模式设计气动阀体检测平台,对修后气动阀进行自测自检,实现对该厂家VA133、VA134型气动阀自拆自修自检,降低对外部厂家援助依赖。The imported equipment LW25-252 circuit breaker in a 220 kV station is a single air supply pneumatic mechanism.Due to the long running time of the internal pneumatic valve,the aging of the sealing ring causes frequent air leakage of the pneumatic valve.This article studies the VA133 and VA134 pneumatic valves in the station's LW25-252 circuit breaker.After disassembling the pneumatic valves,analyzing the working principle and the role of the seals in each part,it is determined that the piston rod sealing ring in the valve body is the source of air leakage in the pneumatic valve,developed special tools based on the valve body piston rod structure for disassembling and assembling the valve body,and further simulated the centralized air supply mode to design a pneumatic valve body inspection platform to conduct self-test and self-inspection of the repaired pneumatic valves to realize the VA133 and VA134 of the manufacturer.The pneumatic valve is self-disassembling,self-repairing and self-inspecting,reducing dependence on external manufacturers for assistance.

关 键 词：断路器气动机构 气动阀漏气 检测装置 集中供气 

分 类 号：TM561.1[电气工程—电器]