Explosive-proof switch for mine

Abstract

The invention provides an explosive-proof switch for a mine. The explosive-proof switch for the mine comprises a box body, a wire connecting cavity and a main cavity and is characterized in that a control transformer, a disconnecting switch, a distance control switch, a vacuum contactor, an electronic protector and a current transformer are arranged in the main cavity; a handle, a stop button and a start button are arranged at one side of the box body; the handle is used for turning on and turning off the disconnecting switch or veering. A magnetic contactor with the attracting current of 2.5A used in the prior art is replaced by the vacuum contactor with the attracting current of 0.38A. Due to the fact that the attracting current of the vacuum contactor is 1 / 6 of that of the magnetic contactor, a wire of 0.38mm and a wire of 1.25mm are adopted by varnished wires for the control transformer matched with the vacuum contactor, a coil is a copper wire, and the weight is 1.4 jin and is reduced by 0.9 jin compared with that of the magnetic contactor. Through tests, each performance parameter of the newly wound control transformer can satisfy the national relative technical standard requirements, and the phenomenon that a transformer in the prior art is burnt due to the lack of capacity is eliminated.

Description

technical field [0001] The invention belongs to the field of transformation of a mine explosion-proof switch, in particular to a mine explosion-proof switch. Background technique [0002] The contactors used in the QBZ series mine explosion-proof switch (80.120.200) mostly use magnetic contactors with a pull-in current of 2.5A. The matching transformers use 0.55mm and 1.5mm wires, and the coils are made of copper. The coil, weighing 2.3 catties, is not only heavy, but also easily burned due to insufficient transformer capacity. Contents of the invention [0003] The object of the present invention is to provide a mine flameproof switch with light overall weight and large transformer capacity, which eliminates the burning of transformers due to insufficient capacity in the past. [0004] The technical solution of the present invention is: a mine explosion-proof switch, including a box body, a wiring cavity and a main cavity, characterized in that: a control transformer, an ...

AI Technical Summary

Problems solved by technology

[0002] The contactors used in the QBZ series mine explosion-proof switch (80.120.200) mostly use magnetic contactors with a pull-in current of 2.5A. The matching transformers use 0.55mm and 1.5mm wires, and the coils are made of copper. The coil, weighing 2.3 catties, is not only heavy, but also easily burned due to insufficient transformer capacity

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