铝导线短路熔珠对固体可燃物引燃能力实验研究

The Study on the Ignition Capability of Aluminium Wire Circuit Melted Bead for Common Solid Combustible

在模拟试验平台上进行了铝导线短路熔珠引燃棉布、聚氨酯泡沫塑料和纸张的试验,得到了不同材料的临界加载电压值和引燃规律。初步分析了加载电压与短路熔珠粒径及引燃能力的关系。结果表明,随着短路电压增大,导线熔珠的粒径逐渐增大,熔珠对固体材料的引燃能力逐渐增强,氧指数越低、表面粗糙、易蓄热的材料越容易被点燃。棉布、聚氨酯泡沫塑料和纸屑被引燃的短路临界电压分别为50V、35V和45V。

The aluminum wire circuit melted bead has a strong ignition capability for the solid combustible. The effect of applied voltage on the number and particle size distribution of melt beads was studied and the ignition capability of the aluminum wire circuit melted bead for cotton, PUR and paper was carried out in a simulated experiment. The result shows that the number of melt beads decreased and the size increased with increasing applied voltage. The material properties of solid combustible had certain influence on the ignition capability of high temperature melt beads. With lower OI, larger heat storage capacity and rough surface, the PUR was easily to be ignited. The critical voltage of cotton, PUR and paper ignited by the electric welding melt bead are 50V,35V和45V respectively.