Abstract： To investigate key factors influencing effective discharge time of superfine powder fire extinguishing equipment with fire detection tube, and to provide theoretical basis for the engineering design of such fire extinguishing equipment, influences of key engineering design parameters of superfine powder fire extinguishing equipment on effective discharge time were investigated, and numerical calculation models of effective discharge time were established through discharge tests and theoretical analysis. The results show that the effective discharge time of superfine powder fire extinguishing equipment grows exponentially with the filling ratio, decreases linearly with the filling pressure, increases linearly with the fire detection tube length, and are negatively related with particle sizes of the fire extinguishing agent.

Keywords: extinguishing equipment with fire detection tube; superfine powder; fire extinguishing agent; effective discharge time

中图分类号：X932        文献标志码：A

文章编号：1008-5548(2015)03-0069-04

DOI:10.13732/j.issn.1008-5548.2015.03.016

收稿日期：2014-09-12， 修回日期：2014-09-22，在线出版时间：2015-06-24。

基金项目：公安部应用创新项目，编号：2012YYCXTJXF149；“十二五”国家科技支撑计划项目，编号：2014BAK17B02。

第一作者简介：陈涛（1980—），男，硕士，助理研究员，研究方向为灭火剂及灭火技术。 E-mail ：chentao@tfri.com.cn。