Intrinsically safety type operation box used in mine

Abstract

The invention discloses an intrinsically safety type operation box used in a mine. The operation box comprises a voltage stabilizing circuit, a power supply isolation circuit, a CAN communication isolation unit, an MCU, a keyboard control chip, a font chip and a display device. The 12V intrinsically safe power supply of an external association switch box is converted into 5V, 3.3V and 1.8V voltage through the voltage stabilizing circuit in the mine used intrinsically safety type operation box to supply power for the internal circuit of the operation box. The CAN communication isolation unit, the display unit, the font chip and the keyboard control chip are connected with the MCU. The power supply isolation circuit is connected with the CAN communication isolation unit which is connected with a communication unit of the external association switch box. By using the intrinsically safe power supply for power supplying, the safety of underground work is improved, the power supply and CAN communication are separated, and the burning of the intrinsically safety type operation box can be avoided even instantaneous high voltage appears.

Description

technical field [0001] The patent of the invention relates to an intrinsically safe operation box for coal mines. Background technique [0002] With the rapid development of the coal industry and the continuous increase of the country's safety supervision on the coal industry, it is required to be safer, more reliable, and more intelligent operation boxes to meet the needs of the development of coal mining machinery. The start and stop of traditional large-scale coal mine machinery mainly rely on magnetic starters and many mechanical knobs on the machine itself, which is cumbersome to operate; the knob switch has more wiring, and the waterproof performance of the rotary shaft of the knob switch is poor, which causes the electrical components to be damp and cause electrical failures ;The display device is a monochrome liquid crystal display, the display content is relatively monotonous, and there are many pages on the screen, it is more cumbersome to turn the pages to search,...

AI Technical Summary

Problems solved by technology

The start and stop of traditional large-scale coal mine machinery mainly rely on magnetic starters and many mechanical knobs on the machine itself, which is cumbersome to operate; the knob switch has more wiring, and the waterproof performance of the rotary shaft of the knob switch is poor, which causes the electrical components to be damp and cause electrical failures ;The display device is a monochrome liquid crystal display, the display content is relatively monotonous, and there are many pages on the screen, it is more cumbersome to turn the pages to search, and there is no isolation protection for the communication and power supply parts. burnt, leading to major accidents

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