一种应用于隔爆试验装置中的新型自动配气系统

A new type of automatic gas distribution system applied in flameproof test devices

针对应用于隔爆试验装置中的传统配气方法存在配气速度慢、系统体积较大的问题,设计了一种基于质量流量法的自动配气系统。该系统采用质量流量控制器精确控制多种不同气体的流量,输出的多种气体经混合装置均匀混合后,由O2分析仪和H2分析仪实时监测混合气体的体积分数。测试结果表明,该配气系统配气速度快、结构简单,配制的多种气体体积分数精度能满足GB 3836.2—2010的要求。

In view of problems of slow speed of gas distribution, big volume of system of traditional gas distribution methods applied in flameproof test devices, an automatic gas distribution system based on mass flow method was designed. The system uses mass flow controller to control flow of several different gases accurately, and the output gases are mixed uniformly by mixed equipment. Volume fractions of the mixed gases are monitored real-timely by oxygen analyzer and hydrogen analyzer. The test result shows that the gas distribution system has fast speed of gas distribution and simple structure, and precision of the volume fractions of the gases distributed by the system can meet requirements of GB 3836.2-2010.