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随着通讯工具的广泛应用和普及,电话机、BP机、对讲机、大哥大等通讯工具已被应用在各种场所.在一般场合,这些通讯工具是不会有什么危险的,但若在有爆炸混合物存在的场所内使用,危险性较大,就有可能引起爆炸或或燃烧.曾有一化工厂发生过电话引起的爆炸事故.该工厂在冲料时,大量的易燃易爆气体向四周扩散,值班人员发现后,立即打电话向厂部报告,就在拿电话简时的瞬间,发生了爆炸.爆炸原因,是这些通讯工具在通话呼叫时,产生高压和强电流,发生瞬间放电出现电火花.如普通电话电压为24伏,正常通话时电流均为30毫安.当人们拿起电话简或持断电话的瞬间,电话机的线圈内产生高电压,
With the wide application and popularization of communication tools, communication tools such as telephone sets, BP machines, walkie-talkies and mobile phones have been used in various places. In general, these communication tools are not dangerous, but if there is Explosion mixture used in the presence of places, dangerous, may cause an explosion or combustion. There was a chemical plant had a telephone explosion caused by the factory in the blasted, the large number of flammable gas to the surrounding Diffusion, on duty personnel found, immediately called the factory to report, just take the phone a brief moment, exploded.The reason for the explosion is that these communication tools in the call, resulting in high voltage and high current, the occurrence of an instantaneous discharge Electricity, such as ordinary telephone voltage of 24 volts, the normal call current are 30 mA.When people pick up the phone Jane or cut off the phone moment, the phone coil produces high voltage,