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为解决电气初期火灾扑救难的问题,设计出一种基于磷酸二氢铵超细干粉灭火剂和探火管的新型自动灭火装置。通过实体配电柜灭火试验,研究这种装置的灭火性能。计算分析磷酸二氢铵超细干粉灭火剂临界灭火浓度。结果表明,用探火管式超细干粉灭火装置能快速、高效扑灭配电柜火灾,超细干粉灭火剂最低设计质量浓度仅为75 g/m3,装置响应时间为10~33 s,灭火时间为2~3 s。探火管式磷酸二氢铵超细干粉灭火装置所要求的最低灭火剂设计浓度约为探火管式七氟丙烷灭火装置的1/9,探火管式二氧化碳灭火装置的1/33。
In order to solve the difficult problem of initial electric fire fighting, a new type of automatic fire extinguishing device based on ammonium dihydrogen phosphate superfine powder fire extinguishing agent and fire detection tube was designed. Through physical distribution cabinet fire test to study the fire extinguishing performance of this device. Calculation and analysis of the critical fire extinguishing agent concentration of ammonium dihydrogen phosphate superfine powder fire extinguishing agent. The results show that the fire extinguishing device can quickly and efficiently extinguish the fire in distribution cabinet. The minimum design concentration of ultrafine powder fire extinguishing agent is only 75 g / m3, the response time of the device is 10 ~ 33 s, the fire extinguishing time For 2 ~ 3 s. Detecting tube ammonium dihydrogen phosphate ultra-fine dry powder fire extinguishing device required minimum design concentration of fire extinguishing agent is about one-ninth of the fire-tube type heptafluoropropane fire extinguishing device, fire-tube carbon dioxide fire extinguishing device 1/33.