1000MW机组循泵液控蝶阀关阀异常分析及处理

Analysis and Treatment of the Circulating Pump Hydraulic Control Butterfly Valve Abnormal of 1000 MW Steam Turbine

某1000 MW火电机组循环水泵出口蝶阀为液动蝶阀,其控制液压油站经常出现油压异常现象,存在循环水泵出口液动蝶阀开关异常的安全隐患,直接影响到循环水系统的安全性和稳定性。针对YNQ32-04型液压油站油压异常现象,通过现场数据采集,利用科学计算公式对液控单向阀、电磁阀、插装阀、液压油缸、梭阀等液控模块元件进行研究分析,排查出插装阀、电磁阀的故障现象及原因,彻底解决了YNQ32-04型液压油站的异常现象。

The outlet butterfly valve of circulating water pump of a 1000 MW thermal power unit is a hydraulic butterfly valve,and abnormal oil pressure often occurs in the control hydraulic oil station.There is a potential safety hazard of abnormal switch of circulating water pump outlet hydraulic butterfly valve,which directly affects the safety and stability of circulating water system.Aiming at the abnormal oil pressure of YNQ32-04 hydraulic oil station,through field data collection and scientific calculation formula,the hydraulic control module components such as hydraulic control check valve,solenoid valve,cartridge valve,hydraulic cylinder and shuttle valve were studied and analyzed.The fault phenomenon and causes of cartridge valve and solenoid valve were found out,and the abnormal phenomenon of YNQ32-04 hydraulic oil station was completely solved.