铜导线二次短路喷溅熔珠密度特征实验研究  

Experimental research on the density characteristics of secondary short circuited plashing beads of copper wires

作　　者：王芸[1] 刘一乐 舒中俊[1] 张金专[1] 

机构地区：[1]中国人民武装警察部队学院,河北廊坊065000 [2]宜昌市消防支队,湖北宜昌443000

出　　处：《消防科学与技术》2015年第7期970-974,共5页Fire Science and Technology

基　　金：公安部应用创新项目资助(2012YYCXWJXY133)

摘　　要：二次短路是火焰或热烟气辐射、热对流对导线绝缘层的破坏作用导致线路发生短路的过程。首次提出采用密度法对单股、多股铜导线在不同烟气浓度、不同温度时二次短路发生之后形成的喷溅熔珠进行特征规律的研究。结果表明,单股铜导线喷溅熔珠密度大于多股铜导线;烟气浓度增大,铜导线喷溅熔珠密度值减小;温度升高,熔珠密度值增大。The secondary short circuit could make the copper wires melting and disconnecting under the conditions of the flame firing and the radiation of hot soot and the heating convection.The article firstly put forward the secondary short circuit splashing-melted beads density law of the influences from the potency of the soot gases and the temperature of environment by density-method.The results showed that as to the average density of secondary short circuited plashing melted beads（SSCPMB）,one-strand copper wire was bigger than that of multi-strand copper wire;as smoke density increased,the density decreased;the density grew along with the temperature.

关 键 词：密度法 导线熔珠 火灾调查 物证鉴定 

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]