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 ›› 2022, Vol. 41 ›› Issue (5): 615-620.

• • 上一篇    下一篇

电缆隧道L型防火隔板的隔热效果分析与侧板高度设计

普子恒1，何 璟1，郭 卫2，周士贻2   

  1. （1.三峡大学 电气与新能源学院，湖北 宜昌 443002； 2.国网北京电力科学研究院，北京 100075 )
  • 出版日期:2022-05-15 发布日期:2022-05-15
  • 作者简介:普子恒（1987-），男，湖北武汉人，三峡大学电气与新能源学院副教授，博士，主要研究方向为高压电器设备绝缘试验技术及输电线路智能运维，湖北省宜昌市西陵区，443002。
  • 基金资助:
    国家自然科学基金青年基金项目（51607103）

Heat insulation effect analysis and side panel height design of L-shaped fire baffle in cable tunnel

PU Zi-heng1, HE Jing1, GUO Wei2, ZHOU Shi-yi2   

  1. （1. College of Electrical Engineering & New Energy, China Three Gorges University, Jiangxi Yichang 443002, China; 2. State Grid (Beijing) Electric Power Research Institute，Beijing 100075, China）
  • Online:2022-05-15 Published:2022-05-15

摘要： 为兼顾电缆隧道中L型防火隔板的隔热效果和施工安装的便捷性，需确定不同工况下L型防火隔板所需最低高度。为此，利用FDS模拟软件，设置不同侧板高度，针对不同火源功率条件下L型防火隔板对不同电压等级电缆的保护效果进行模拟，分析安装隔板区域的温度变化和烟气扩散。结果表明：火源功率为400，600 kW时，电缆充分燃烧阶段至衰减末期，烟气蔓延速度分别比火源功率为200 kW时约快50%和66%；当110 kV电缆层间距为0.5 m，火源功率为200，400，600 kW时，L型防火隔板侧边最优高度分别为0.20，0.25，0.25 m；当10 kV电缆层间距为0.25 m时，三种火源功率下L型防火隔板侧边最优高度分别为0.100，0.125，0.125 m，隔板上方被保护电缆护套层温度均低于热解温度。研究成果可为不同工况下防火隔板侧板高度设计提供参考。

关键词: 电缆隧道火灾, L型防火隔板, 侧板高度, 隔热效果, 烟气扩散

Abstract: Abstract: In order to take into account the thermal insulation effect of the L-shaped fire barrier in the cable tunnel and the convenience of construction and installation, it is necessary to determine the minimum height required for the L-shaped fire barrier under different working conditions. For this reason, this paper adopts FDS simulation method to numerically simulate the protective effect of the L-shaped fire barriers with different side plate heights on the cables of different voltage levels under different fire source powers, and analyze the temperature changes and smoke in the area where the partitions are installed. The results show that when the fire source power is 400 kW and 600 kW, the smoke spreading speed is about 50% and 66% faster than when the fire source power is 200 kW from the full combustion stage of the cable to the end of attenuation; When the 110 kV cable layer spacing is 0.5 m, with the fire source power of 200, 400, 600 kW, the optimal heights of the sides of the L-type fire barrier are 0.20, 0.25, and 0.25 m respectively; When the distance between the 10 kV cable layers is 0.25 m, the optimal heights of the sides of the L-shaped fire barrier under the three power of the fire source are 0.100, 0.125, and 0.125 m, respectively, and the temperature of the sheath layer of the protected cable above the partition is lower than the pyrolysis temperature. This research result can provide a reference for the height design of the side panel of the fire barrier under different working conditions.

Key words: Key words: cable tunnel fire, L-type fire barrier, side plate height, heat insulation effect, smoke diffusion