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

Abstract

The invention relates to a mine explosion-proof double power supply multi-circuit combination switch, which is characterized in that it includes a casing, two independent flameproof wiring cavities are arranged on the upper end of the casing, and two independent flameproof wiring chambers are arranged inside the casing. In the main chamber, the two isolation reversing switches are respectively set in two independent flameproof main chambers, which are respectively connected to the terminals in the two independent flameproof wiring chambers at the upper end, and the grounding terminals are respectively arranged at the lower end and the top of the shell There are start button, setting button and integrated protector on the front door panel of the casing, stop sign and reversing indicator sign on one side of the casing, and the anti-electric board is set on the top of two independent flameproof wiring compartments . The invention has the advantages of reliable performance and convenient maintenance, which ensures the need for underground ventilation in coal mines, prevents the accumulation of gas, and avoids 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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