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斜井人车和井口的通讯联络,普遍采用B3S3型36伏矿用信号电铃,在电铃两端还并联一只15瓦的灯泡。当沿巷道侧壁敷设的两根互相绝缘的裸铜线被短接时,接通信号回路,发出声光信号。电铃的等效电感量约440毫亨,两根裸铜线短接时产生的火花能量较大,在瓦斯巷道中使用时,有一定的危险性。 我们制作了一个晶体管式安全火花信号继电器,原理见附图。电路由BG_1、BG_2组成一施密特触发器,BG_2驱动继电器J接通信号回路,发讯号用的裸铜线FX_1、FX_2接在触发器的输入端1、2上。FX_1、FX_2开
Inclined well car and wellhead communication, commonly used B3S3 36 volt mine signal bells, both ends of the bells in parallel with a 15-watt light bulb. When two insulated bare copper wires laid along the sides of the roadway are shorted, the signal circuit is turned on to emit an acousto-optic signal. The equivalent inductance of the bells is about 440 millihenries. The spark energy generated when the two bare copper wires are short-circuited is relatively large, and there is a certain danger when used in the gas tunnel. We made a transistor safety spark signal relay, the principle shown in the drawings. The circuit consists of BG_1, BG_2 constitute a Schmitt trigger, BG_2 drive relay J connected to the signal loop, send signals with bare copper FX_1, FX_2 connected to the flip-flop input 1,2. FX_1, FX_2 on