一起阀门密封圈漏装导致的非停事故分析  

Analysis on an Unplanned Outage Accident Caused by Neglected Installation of Valve Seal Ring

作　　者：徐钟宇 XU Zhongyu(East China Electric Power Test&Research Institute,China Datang Corporation Science and Technology General Research Institute Co.,Ltd.,Hefei 230000,China)

机构地区：[1]中国大唐集团科学技术研究总院有限公司华东电力试验研究院,合肥230000

出　　处：《热力透平》2023年第4期312-314,共3页Thermal Turbine

摘　　要：对一起机组非计划停运事故进行了详细分析,指出事故原因是1号中调阀卸荷阀上部至超速保护控制(OPC)母管逆止阀密封圈缺失,导致逆止阀内漏,在拆卸卸荷阀处理漏油缺陷时漏油量加大,致使OPC母管泄压。根据分析结果给出了相关防范措施。研究成果可为同类电厂处理类似问题提供借鉴。Analysis was carried out on an unplanned outage accident of a steam turbine unit in detail,and it was indicated that the seal ring was missing,which should be installed in the non-return valve connecting the upper part of the unloading valve of No.1 medium pressure regulating valve and the header of the over-speed protect controller(OPC),resulting in the internal leakage of the non-return valve.The oil leakage increased during disassembling the unloading valve,thus the pressure in the OPC header was relieved.Corresponding provention measures were put forward based on the analysis results.The research results can provide reference for handling similar problems in power plants of the same type.

关 键 词：EH油系统 卸荷阀 密封圈 漏装 非计划停运 

分 类 号：TK268[动力工程及工程热物理—动力机械及工程]