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通过分析国内外标准许用的几种长管拖车用安全泄放装置的优缺点,提出优选的结构形式;统计分析了近年来长管拖车火灾案例与安全泄放装置的响应情况,指出火灾条件下,瓶内气体不仅可以通过安全泄放装置泄放,也可通过密封件损坏及管件变形部位泄放;安全泄放装置在部分火灾事故下有所动作,一定程度上能够保证气瓶的安全,但随机性较大;极端火灾情况下,安全泄放装置很难起到作用。
Through analyzing the merits and demerits of several kinds of safe discharge devices for long tube trailers approved by domestic and foreign standards, the preferable structure is put forward. The fire response cases of long tube trailers and safety relief devices are analyzed statistically in recent years. , The gas in the bottle can not only be discharged through the safety relief device but also can be damaged by the seal and the deformed parts of the pipe. The safety relief device can act under some fire accidents and can ensure the safety of the gas cylinder to some extent , But the randomness is big; in the case of extreme fire, the safety relief device is hard to play a role.