城市地下综合管廊电缆火灾低压细水雾灭火效能研究  

Research on the fire extinguishing efficiency of low-pressure water mist in urban underground utility tunnel cable fires

作　　者：李彬 宁赵玉[1,2] 张志伟 贾伯岩[3] Li Bin;Ning Zhaoyu;Zhang Zhiwei;Jia Boyan(School of Safety Engineering,China University of Mining and Technology,Jiangsu Xuzhou 221116,China;Shenzhen Research Institute,China University of Mining and Technology,Guangdong Shenzhen 518000,China;State Grid Hebei Electric Power Research Institute,Hebei Shijiazhuang 050011,China)

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]中国矿业大学深圳研究院,广东深圳518000 [3]国网河北省电力公司电力科学研究院,河北石家庄050011

出　　处：《消防科学与技术》2024年第6期787-791,共5页Fire Science and Technology

基　　金：深圳市科创委2022年度基础研究专项面上项目(JCYJ20220530164601004);国网河北省电力有限公司科技项目(kj2022-061)。

摘　　要：为了研究城市地下综合管廊电缆火灾低压细水雾灭火的有效性、明确影响低压细水雾灭火效能的关键因素,搭建了缩尺寸综合管廊低压细水雾灭火试验平台并开展了灭火试验。试验结果表明,低压细水雾能够快速有效地扑灭综合管廊电缆火灾,灭火时间最快为7 s,在启动灭火系统后50 s即可将管廊内部最高温度从650℃降至40℃。压力与喷头流量系数的改变对低压细水雾灭火效能影响较大,灭火时间分别最多缩短75.0%和66.7%,平均降温速率最高为8.2℃/s和7.43℃/s;喷头间距的改变对灭火效能影响相对较小,灭火时间最多缩短47.3%,平均降温速率最高为6.1℃/s。In order to study the effectiveness of low-pressure water mist fire extinguishing in urban underground integrated pipe corridor cable fire and to identify the key factors influencing its efficiency,a scaled-down test platform for low-pressure water mist fire extinguishing in utility tunnels was constructed,and a serial of fire extinguishing tests were conducted.The test results demonstrate that low-pressure water mist can rapidly and effectively extinguish cable fires in utility tunnels,with the quickest fire extinguishing time of 7 s.Within 50 s of activating the system,the internal temperature of the tunnel can be reduced from 650℃to 40℃.The changes in pressure and nozzle flow coefficient have a significant impact on the fire extinguishing efficiency of lowpressure fine water mist.The fire extinguishing time is shortened by up to 75%and 66.7%respectively,and the average cooling rate is highest at 8.2℃/s and 7.43℃/s;The change in nozzle spacing has a relatively small impact on fire extinguishing efficiency,with a maximum reduction of 47.3%in fire extinguishing time and an average cooling rate of 6.1℃/s.

关 键 词：低压细水雾 综合管廊 电缆火灾 灭火效能 

分 类 号：X913.4[环境科学与工程—安全科学] TU990.3[建筑科学—市政工程]