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 ›› 2026, Vol. 45 ›› Issue (3): 1-6.

• •    下一篇

不同弯折角度下悬挂电缆火蔓延行为试验研究

彭伟1,2,3, 王依婷3, 李雪豪3, 周月3, 谷恒3   

  1. （1.安徽理工大学 深部煤炭安全开采与环境保护全国重点实验室，安徽 淮南 232000； 2.安徽理工大学 公共安全与应急管理学院，安徽 合肥 231131； 3.安徽理工大学 安全科学与工程学院，安徽 淮南 232000）
  • 收稿日期:2024-11-20 修回日期:2025-06-25 出版日期:2026-03-15 发布日期:2026-03-15
  • 作者简介:彭 伟，安徽理工大学公共安全与应急管理学院，教授，主要从事火灾防治研究，安徽省淮南市田家庵区泰丰大街168号，232000。
  • 基金资助:
    安徽高校自然科学研究项目（2024AH040063）

Experimental study on fire spread behavior of suspended cables under different bending angles

Peng Wei1,2,3, Wang Yiting3, Li Xuehao3, Zhou Yue3, Gu Heng3   

  1. (1. State Key Laboratory for Safe Mining of Deep Coal Resources and Environment Protection, Anhui University of Science and Technology, Huainan Anhui 232000, China; 2. School of Public Safety and Emergency Management, Anhui University of Science and Technology, Hefei Anhui 231131, China; 3. School of Safety Science and Engineering, Anhui University of Science and Technology, Hefei Anhui 232000, China)
  • Received:2024-11-20 Revised:2025-06-25 Online:2026-03-15 Published:2026-03-15

摘要： 为探讨弯折角度与横截面积对悬挂电缆燃烧特性的影响，选取长度一致的扁平三铜芯交联绝缘聚乙烯电缆作为研究对象，开展了20组电缆燃烧试验，通过测量火焰温度、熔滴温度、电缆火蔓延时间及火蔓延速度等关键参数，分析了不同弯折角度和横截面积对电缆火蔓延行为的影响。结果表明：弯折角度减小时，火蔓延速度呈现先增大后减小的趋势，且在θ=90°时达到峰值，此峰值状态下的火蔓延速度约为θ=180°时火蔓延速度的1.6倍。横截面积与火蔓延速度呈负相关，横截面积为2.5 mm²电缆的火蔓延速度为16.0 mm²电缆火蔓延速度的1.9倍。同时，弯折角度越小，横截面积越大，贴附电缆流淌的熔滴数量越多，熔滴温度越高。此外，弯折处火焰最高温度随着弯折角度减小而增加，横截面积增加时，火焰最高温度先增大后减小。

关键词: 电缆火灾, 悬挂电缆, 弯折角度, 横截面积, 火蔓延

Abstract: The purpose of this study is to investigate the influence of bending angle and cross-sectional area on the combustion characteristics of suspended cables. A flat three-copper-core cross-linked insulated polyethylene cable with the same length was selected as the research object, and 20 groups of cable combustion tests were carried out. The effects of different bending angles and cross-sectional areas on the fire spread behavior of the cable were analyzed by measuring key parameters such as flame temperature, droplet temperature, cable fire spread time and fire spread speed. The results show that when the bending angle decreases, the flame spread velocity increases first and then decreases, and reaches the peak at θ=90°. The flame spread velocity at this peak state is about 1.6 times that at θ=180°. The cross-sectional area is negatively correlated with the flame spread speed. The flame spread speed of the cross-sectional area 2.5 mm2 cable is 1.9 times that of the 16.0 mm2 cable. At the same time, the smaller the bending angle, the larger the cross-sectional area, the more the number of droplets flowing on the attached cable, and the higher the droplet temperature. In addition, the maximum flame temperature at the bend increases with the decrease of the bending angle. When the cross-sectional area increases, the maximum flame temperature increases first and then decreases.

Key words: cable fire, suspended cable, bending angle, cross-sectional area, fire spread