湿式报警阀组的要求时平均失效概率计算方法研究  

Research on the calculation method of average failure probability on demand of wet alarm valve group

作　　者：李金梅 杨心怡 李强 Li Jinmei;Yang Xinyi;Li Qiang(School of Fire Protection Engineering,China People's Po-lice University,Hebei Langfang 065000,China)

机构地区：[1]中国人民警察大学防火工程学院,河北廊坊065000

出　　处：《消防科学与技术》2024年第10期1455-1459,共5页Fire Science and Technology

基　　金：警察大学校级科研重点专项课题(ZDZX202005)。

摘　　要：受腐蚀、老化、堵塞等累加因素影响,火灾时自动喷水灭火系统的湿式报警阀组有概率无法按需运行。为科学评估湿式报警阀组在执行预定功能方面的能力,对阀组的安全失效模式和危险失效模式进行分析,通过引入功能安全评估方法,使用JMP数据分析软件对区间删失型失效数据的分布情况进行拟合。实例分析表明,湿式报警阀的失效概率函数符合威布尔分布,进而计算获得PFD_(avg),评估阀组的SIL等级。研究方法可为其他固定消防设施的功能安全评估提供借鉴,有助于提升消防系统安全管理水平。Affected by corrosion,aging,blockage and other cumu-lative factors,the wet alarm valve group of the automatic sprin-kler fire extinguishing system in case of fire has a probability that it cannot operate on demand.In order to scientifically evaluate the ability of the wet alarm valve bank to perform predetermined func-tions,the safety failure modes and dangerous failure modes of the valve bank are analyzed.Through the introduction of functional safety evaluation methods,the distribution of interval deleted fail-ure data is simulated by JMP relevant software.Example analysis showed that the failure rate function of the wet alarm valve con-forms to the Weibull distribution,and then the average probabil-ity of failure on demand(PFD_(avg))is calculated,and the SIL level of the valve pack is evaluated.The research method can provide references for the functional safety evaluation of other fixed firefighting facilities and help to improve the safety management level of fire-fighting system.

关 键 词：湿式报警阀组 威布尔分布 安全完整性等级 要求时平均失效概率 

分 类 号：X932[环境科学与工程—安全科学] TU892[建筑科学]