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 ›› 2021, Vol. 40 ›› Issue (1): 149-153.

• • 上一篇    下一篇

铝合金导线机械破坏残缺部位发热规律研究

李九霖，李阳，刘义祥   

  1. 中国人民警察大学，河北廊坊065000
  • 出版日期:2021-01-15 发布日期:2021-01-15
  • 通讯作者: 李阳(1986-)，男，中国人民警察大学副教授。
  • 作者简介:李九霖(1995-)，男，河北沧州人，中国人民警察大学硕士研究生，主要从事电气火灾痕迹识别的研究，河北省廊坊市西昌路220 号，065000。
  • 基金资助:
    中国人民警察大学重点实验室培育类课题(2019sycxpd)

Study on heating law of local defect of aluminum alloy wire caused by mechanical damage

LI Jiu-lin, LI Yang, LIU Yi-xiang   

  1. China People's Police University, Hebei Langfang 065000,China
  • Online:2021-01-15 Published:2021-01-15

摘要：

为量化铝合金导线局部残缺与电阻发热的关系，探究电阻发热对导线引燃能力的影响，模拟AA8176 型铝合金导线受到机械破坏造成的导线局部不同程度受损的情况，分别通入过电流，观察导线发烟发热现象，研究铝合金导线机械破坏残缺部位发热规律。研究发现：通入1.5 倍和2 倍过电流时，铝合金导线残缺位置温度与其线径和横截面积均呈负相关，可拟合出一次函数方程；铝合金导线残缺部位发烟和绝缘热解炭化平均时间短于原始导线和上层绝缘破坏导线，其火灾危险性增大。

关键词: 消防, 火灾调查, 电阻发热, 铝合金导线, 机械破坏

Abstract:

In order to quantify the relationship between the local defect of the aluminum alloy wire and the resistance heating, and explore the influence of the resistance heating on the ignitability of the wire, this paper simulates the situation that the AA8176 aluminum alloy wire is partially damaged by mechanical damage. Powering on overcurrent, observe the smoke and heat phenomenon of the wire, and study the heating law at the local defect of the aluminum alloy wire induced by mechanical damage. It is found that the temperature at the local defect of aluminum alloy wire is negatively correlated with its line diameter and cross-sectional area when 1.5 times and 2 times of overcurrent are applied. The average time of fume emission and insulation carbonization of aluminum alloy wires is shorter than that of original wires and damaged wires of upper insulation, which indicating that the fire risk is increased. 

Key words: fire protection, fire investigation, resistance heating, aluminum alloy wire, mechanical damage