Mine explosion-proof and intrinsically safe drive center

Abstract

The invention discloses a mine explosion-proof and intrinsically safe drive center, and relates to a voltage change and motor speed controller which can be applied in hazardous locations, such as coal mines and tunnels and the like with explosive gas, such as gas and the like, and coal-dust explosion risks. The invention aims at providing a device which can achieve explosion-proof and waterproof requirements in a coal mine and integrates voltage change, motor starting, speed regulation and protection into a whole. The adopted technical scheme is as follows: a mine explosion-proof high-voltage vacuum power distribution device, a dry-type transformer used in a mine mobile substation, and a mine explosion-proof and intrinsically safe transducer are respectively arranged in three independent explosion-proof boxes; and the three explosion-proof boxes are connected through flanges. The mine explosion-proof and intrinsically safe drive center can be widely applied in hostile environments, such as mines, opencut coal mines, ports, tunnels and the like.

Description

technical field [0001] The invention relates to a mining explosion-proof and intrinsically safe drive center, which relates to a voltage conversion and motor speed regulation control equipment used in coal mines, tunnels and other dangerous places with explosive gases such as gas and coal dust. Background technique [0002] The current power supply mode of coal mine underground equipment in my country is: ground substation - underground central substation - regional substation - feed switch - mobile substation - multiple explosion-proof frequency converters - multiple explosion-proof motors - - Multiple working machines; [0003] The installed equipment in coal mines has large power and many equipments, including belt conveyors, scrapers, fans, water pumps and other large equipment in coal mines. These equipments have power supply, motor speed regulation, soft start, automatic control, circuit connection between equipment, and signal Comprehensive issues such as communicatio...

AI Technical Summary

Problems solved by technology

[0003] The installed equipment in coal mines has large power and many equipments, including belt conveyors, scrapers, fans, water pumps and other large equipment in coal mines. These equipments have power supply, motor speed regulation, soft start, automatic control, circuit connection between equipment, and signal Comprehensive issues such as communication, protection compatibility, and explosion-proof safety performance are becoming more and more prominent. In particular, there are many problems with the cooperation of high-power inverters with other equipment; because the inverter itself is a huge source of interference, it may interfere with other equipment during use. Normal operation, causing problems such as coordination with the front-stage switch, causing the leakage protection of the switch to malfunction; this is due to the incompatibility between the design principles of the frequency converters of different manufacturers and the design methods of the front-stage switch, resulting in mismatching between each other. It is difficult to solve the problem fundamentally in practice; due to the limitation of underground conditions, it is impossible to copy the solution of the general industrial system on the ground. It is urgent to have a solution that can solve voltage conversion, motor starting, and speed regulation, but also has a small size and is explosion-proof. , excellent waterproof performance, high reliability integrated electrical equipment

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