主管:中华人民共和国应急管理部
主办:应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU

消防科学与技术 ›› 2024, Vol. 43 ›› Issue (10): 1455-1458.

• • 上一篇    下一篇

湿式报警阀组的要求时平均失效概率计算方法研究

李金梅, 杨心怡, 李强   

  1. (中国人民警察大学 防火工程学院,河北 廊坊 065000)
  • 收稿日期:2023-11-30 修回日期:2024-03-26 出版日期:2024-10-15 发布日期:2024-10-15
  • 作者简介:作者简介:李金梅(1980- ),女,贵州安顺人,中国人民警察大学讲师,主要从事智慧消防方面的研究,河北省廊坊市安次区西昌路220号,065000。
  • 基金资助:
    基金项目:警察大学校级科研重点专项课题(ZDZX202005)

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

Li Jinmei,Yang Xinyi,Li Qiang   

  1. (School of Fire Protection Engineering, China People's Police University, Hebei Langfang 065000,China)
  • Received:2023-11-30 Revised:2024-03-26 Online:2024-10-15 Published:2024-10-15

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。

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

Abstract: Affected by corrosion, aging, blockage and other cumulative factors, the wet alarm valve group of the automatic sprinkler 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 functions, 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 failure data is simulated by JMP relevant software. Example analysis showed that the failure rate function of the wet alarm valve conforms to the Weibull distribution, and then the average probability 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 fire-fighting facilities and help to improve the safety management level of fire-fighting system.

Key words: wet system alarm valves, Weibull distribution, safety integrity level, average probability of dangerous failure on demand