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

消防科学与技术 ›› 2024, Vol. 43 ›› Issue (6): 787-791.

• • 上一篇    下一篇

城市地下综合管廊电缆火灾低压细水雾灭火效能研究

李彬1,2, 宁赵玉1,2, 张志伟2, 贾伯岩3   

  1. （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）
  • 出版日期:2024-06-15 发布日期:2024-06-15
  • 作者简介:李 彬(2000- )，男，安徽池州人，中国矿业大学安全工程学院硕士生，主要从事城市地下火灾防护方面的研究，江苏省徐州市铜山区大学路1号，221116，1006390508@qq.com。
  • 基金资助:
    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）

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

Li Bin1,2, Ning Zhaoyu1,2, Zhang Zhiwei2, Jia Boyan3#br#   

  1. (1. School of Safety Engineering, China University of Mining and Technology, Jiangsu Xuzhou 221116, China; 2. Shenzhen Research Institute, China University of Mining and Technology, Guangdong Shenzhen 518000, China; 3. State Grid Hebei Electric Power Research Institute, Hebei Shijiazhuang 050011, China)
  • Online:2024-06-15 Published:2024-06-15

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。

关键词: 低压细水雾, 综合管廊, 电缆火灾, 灭火效能

Abstract: 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 low-pressure 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.

Key words: low-pressure water mist, utility tunnel, cable fire, fire extinguishing efficiency