Flame-proof type dual power supply multi-loop combined switch for mining

Abstract

The invention relates to a mining flameproof dual-power multi-loop combination switch. The invention is characterized in that the invention comprises a shell; the upper end of the shell is provided with two independent flameproof wiring chambers and the middle thereof is provided with two independent flameproof main chambers; two isolation phase-change switches are arranged in the two independent flameproof main chambers respectively and respectively connected with the wiring terminals which are arranged in the two independent flameproof wiring chambers at the upper end; grounding terminals are arranged at the lower end and on the top of the shell respectively; the front door of the shell is provided with a starting button, a setting button and a comprehensive protector respectively; one side of the shell is provided with a stopping label and a steering indicating label; an electricity prevention plate is arranged on the top of two independent flameproof wiring chambers. The invention has the advantages of reliable performance, convenient maintenance, ensuring the requirement of the underground ventilation of coal mine, preventing the collection of gas, and avoiding the occurrence of accidents.

Description

technical field [0001] The invention relates to a mine explosion-proof dual-power multi-circuit combination switch, which is used in underground coal mines to control three-phase squirrel cages in lines with AC 50Hz, voltage 380V to 1140V, and rated currents of 80A and 120A respectively. The direct or long-distance start and stop of the type asynchronous motor can realize the automatic conversion of the standby fan; the two-machine drag can start and run continuously and protect the motor and related circuits. It is especially suitable for uninterrupted air supply to working faces and roadways in underground coal mines, ensuring the ventilation needs of underground coal mines, preventing the accumulation of gas, and avoiding accidents. It belongs to the technical field of combined switches. Background technique [0002] The vacuum electromagnetic starter for wind power lock is widely used in mines and is one of the most common and conventional wind power locks. At present, m...

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Problems solved by technology

[0002] The vacuum electromagnetic starter for wind power lock is widely used in mines and is one of the most common and conventional wind power locks. At present, mine ventilation equipment uses a single power supply, single circuit power supply, and uses photodiode display. When there is a power failure, the ventilation stops and gas cannot be removed. It brings the danger of gas accumulation to the mine. The original product adopts analog circuit. After a power failure, there is no event record, event query and other functions, and it is impossible to complete the power automation control management.

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