热辐射对BVVB护套线短路类型及燃烧行为影响研究  

Study on the influence of thermal radiation on the short-circuit type and combustion behavior of BVVB sheath wire

作　　者：赵翊彤 张瑾 李阳 王勇 Zhao Yitong;Zhang Jin;Li Yang;Wang Yong(China People's Police University,Hebei Langfang 065000,China;Yancheng Fire and Rescue Division,Jiangsu Yancheng 224000,China)

机构地区：[1]中国人民警察大学,河北廊坊065000 [2]盐城市消防救援支队,江苏盐城224000

出　　处：《消防科学与技术》2023年第5期643-647,共5页Fire Science and Technology

摘　　要：为深入研究电气火灾中热辐射对短路类型及燃烧行为的影响,搭建热辐射诱发BVVB护套线发生短路故障试验电路,在不同热辐射下对通电导线进行加热,研究短路类型及燃烧现象。结果表明:当热通量为27、30、32 kW/m^(2)时,金属短接型短路发生概率高于炭化路径型短路,在30 kW/m^(2)时,金属短接型短路发生概率最高,为100%;热通量为34、36 kW/m^(2)时,炭化路径型短路发生概率达到80%;导线发生金属短接型短路时电弧能量在200.22~240.03 J,且短路发生后绝缘燃烧的概率为30.8%;炭化路径型短路的电弧能量在511.34~2542.04 J,且短路后必然引发绝缘燃烧,火灾危险性更大。研究结果可对溯源电气火灾发生的根本原因提供数据支撑。In order to further study the effect of thermal radiation on short circuit types and combustion behavior in electrical fire,the experimental circuit of thermal radiation induced short circuit fault on BVVB sheath cables was built.The short fault and combustion behaviors on energized cables exposed to different heat fluxes were observed.The results show that the probability of physical short is higher than that of arcing short when the heat flux is 27,30,32 kW/m^(2).When the heat flux is 30 kW/m^(2),the probability of physical short is highest,which is up to 100%.When the heat flux is 34,36 kW/m2,the probability of arcing short is higher than that of physical short,the highest of which is up to 80%.The arc energy is between 200.22 J and 240.03 J when the physical short arc is produced and the combustion probability of physical short is 30.8%.However,the arc energy is 511.34~2542.04 J when the arcing short is produced,the probability of ignition after short circuit is 100%.Conspicuously,arcing short is of greater fire danger.The research results can provide data support for tracing the root cause of electrical fire.

关 键 词：电气火灾 热辐射 BVVB护套线 金属短接型短路 炭化路径型短路 

分 类 号：X932[环境科学与工程—安全科学] TU998.12[建筑科学—市政工程]