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隔爆型电气设备由2个或多个联通空腔组成时,若腔内瓦斯爆炸往往很容易产生压力重叠现象。一般来说,压力重叠会造成爆炸压力的急剧上升,产生比预期大的爆炸压力,因此,隔爆型电气设备要尽量避免压力重叠现象的出现,或者通过增大外壳强度满足其耐爆性能。通过多次试验,确定2腔联通隔爆试样的最大参考压力测量点及传爆路径,为2腔小孔联通型式的隔爆型电气设备参考压力的测定及隔爆性能设计提供参考。
Flameproof electrical equipment consists of two or more Unicom cavity, if the cavity gas explosion is often prone to pressure overlay phenomenon. In general, the pressure overlap will cause the explosion pressure to rise sharply, resulting in higher than expected explosion pressure. Therefore, the explosion-proof electrical equipment should try its best to avoid the phenomenon of pressure overlap or increase its explosion resistance by increasing the shell strength. Through multiple tests, the maximum reference pressure measurement point and propagation path of 2-cavity Unicom explosion-proof sample are determined, which can be used as a reference for the determination of the reference pressure and flameproof performance of the explosion-proof electrical equipment with 2 holes.