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目前手提式灭火器驱动压力源主要有两种:一是压缩气体,二是沸点较高的液化气体。手提式泡沫灭火器、轻水灭火器和干粉灭火器的驱动压力源属于前一种,手提式二氧化碳灭火器和“1211”灭火器的驱动压力源属于后一种。液化气体在容器中由于压力较高而使一部分呈液态,一旦容器破裂压力骤燃下降时,这些饱和液体立即蒸发,体积急剧膨胀,其爆破形式相当于压缩气体。我们知道,灭火器爆破时所释放的能量与驱动压力源介质的物性状态有密切关系。如果驱动压力源是液体,由于液体的可压缩性很
Currently there are two main types of portable fire extinguisher driving pressure source: one is compressed gas, and the other is high boiling point liquefied gas. The driving pressure sources for portable foam fire extinguishers, light water fire extinguishers and dry powder fire extinguishers are of the former type. The latter is the driving pressure source for portable carbon dioxide fire extinguishers and “1211” fire extinguishers. Liquefied gas in the container due to high pressure and some of the liquid state, once the container burst pressure drops suddenly, these saturated liquid vaporization, the rapid expansion of the volume, the blasting form is equivalent to the compressed gas. We know that the energy released when a fire extinguisher explodes is closely related to the physical state of the medium driving the pressure source. If the driving pressure source is liquid, the fluid is very compressible