竖井电缆分支连接接触不良故障鉴定研究  

Research on identification of poor cable branched connection fault in shaft

作　　者：冯俊伟[1] 邓素妍 莫善军[1] 

机构地区：[1]中山大学工学院广东省消防科学技术重点实验室,广东广州510006

出　　处：《消防科学与技术》2016年第3期429-433,共5页Fire Science and Technology

基　　金：公安部消防局科研计划项目(2013XFCX13);广东省自然科学基金项目(S2013010013225);广州市科技计划项目(2014Y2-00069)

摘　　要：基于穿刺线夹结构和施工工艺,分析其作为楼层电缆分支连接器引发接触不良故障可能存在的原因。开展电缆分支接触不良故障的模拟实验,提取高温凝固形成的熔痕,对样品熔痕进行外观分析和金相分析。针对3起实际火灾案例的熔痕特征,对比分析了实验与案例熔痕的外观形貌和金相组织,分析两者的差异性和相似性,总结竖井电缆分支连接接触不良故障引发火灾形成的熔痕特性。This paper analyzes the reasons how insulation pierc- ing connectors may cause poor electrical connection based on its structure and manufacture process. A simulation experiment is designed and carried out. Its trace evidences which are the mel- ted marks form from high-temperature heat is extracted, oh- served and metallographically analyzed. Meanwhile, we analyze the characteristics of melted marks in three actual cases, com- pare these melted marks with those we extract from the simula- tion experiment to find out how they differ from or resemble with each other. The features of melted mark formed in electri- cal fire cause by poor cable branched connection in shaft are concluded.

关 键 词：熔痕 接触不良 金相分析 电气火灾 

分 类 号：X928.7[环境科学与工程—安全科学] TU998.12[建筑科学—市政工程]