Mining intrinsic safety type power box

Abstract

The invention provides a mining intrinsic safety type power box which comprises an outer shell, a switch, a charging connector, a cascading connector, an output connector, a charging battery and a circuit board, wherein the switch, the charging connector, the cascading connector and the output connector are fixedly installed on the outer shell in a sealed mode, and the charging battery and the circuit board are arranged inside the outer shell. A discharging control circuit, an undervoltage detection circuit, a first isolation converting circuit, a second isolation converting circuit, a first automatic switchover circuit, a second automatic switchover circuit, a first intrinsic safety protection circuit, a second intrinsic safety protection circuit and a light-emitting diode (LED) indicator light are arranged on the circuit board. The battery is in electric connection with the charging connector and the discharging control circuit respectively. The discharging control circuit, the undervoltage detection circuit, the two isolation converting circuits, the two automatic switchover circuits and the two intrinsic safety protection circuits are respectively and sequentially in electric connection. The switch is electrically connected with the discharging control circuit. The automatic switchover circuits are in electric connection with the cascading connector. The intrinsic safety protection circuits are in electric connection with the output connector. When the mining intrinsic safety type power box is used, operation and cascading are convenient, working is reliable, safety performance is good, automatic switchover can be achieved, and an emergency power supply can be incessantly supplied for a communication base station for a long time.

Description

technical field [0001] The invention relates to a DC power supply, in particular to an intrinsically safe automatic switching uninterrupted dual-circuit power supply box for coal mine emergency rescue. Background technique [0002] When an emergency or disaster occurs in a coal mine, in order to achieve the purpose of emergency rescue, it is usually necessary to quickly deploy a communication system. The communication system requires a mining power supply that can supply power for communication base stations and other equipment that meets national safety regulations. The current mining power supply generally adopts the mine AC input and converts it into an intrinsically safe DC output mode. However, in the case of emergency rescue, the AC input has generally been cut off, so this power supply is not suitable for emergency rescue communication systems. Therefore, the power supply of the base station of the emergency rescue communication system can only be powered by the batte...

AI Technical Summary

Problems solved by technology

At present, mining battery boxes are generally large-capacity explosion-proof and intrinsically safe equipment. Due to their large size and heavy weight, they are not easy to carry and do not meet the requirements of portable emergency rescue equipment.

When the battery box is designed as a pure intrinsically safe device, its battery capacity is limited by national security regulations, and cannot meet the 11 hours or longer work of the communication base station in the industry standard "MT / T1129-2011 General Technical Conditions for Mine Disaster Relief Communication Systems" Therefore, multiple power boxes must be used to supply power to a communication base station in time-sharing. The disadvantage is that when different power boxes are switched between power supplies, it will cause the communication base station to be powered off and restarted, resulting in the failure of the communication system. Interruption, which has a major impact on emergency rescue work

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