轻质易碎结构在气体爆炸泄压防护中的使用研究

Application Research on Venting Structure with Light and Fragile Material in Venting Protection of Gas Explosion

为研究轻质易碎泄压结构在建筑物内部气体爆炸防护中的适用性,根据室内气体爆燃压力特性及轻质易碎结构的泄压原理,分析了轻质易碎泄压结构在爆燃压力作用下的动力特性;运用气体爆炸加载实验装置开展泄爆实验,结合现行国家泄爆设计规范,确定了轻质易碎结构在室内气体爆炸泄压防护中的使用原则,并提出了泄压结构泄爆性能检测实验方法。研究表明:对硅酸钙板构成的轻质易碎泄压结构,开启动压随着室内爆燃压力作用时间增大而逐渐减小,可用于气体爆燃压力作用时间较长的情况,使用时应以开启动压为泄爆设计指标,必须进行泄爆性能测试。

In order to explore the protecting effect of venting structure with light and fragile material on gas explosion in building,the dynamic characteristics of venting structure under gas deflagration condition are analyzed according to the characteristics of internal gas deflagration overpressure and the protective theory of venting structure with light and fragile material.The vented explosion tests are performed by the gas explosion loading experimental equipment.The principles of using the venting structure with light and fragile material are proposed according to the current national design code of venting deflagration,which can be used in engineering protection of indoor gas explosion.The experimental verification methods of venting performance are also presented.The research results show that,for a venting structure with calcium silicate board,the opening dynamic pressure decreases with the increase in the duration time of gas deflagration pressure.Such venting structure should be used in the case of internal gas deflagration pressure with long duration time,and the opening dynamic pressure is regarded as its venting index and the venting performance test should be made.