Airtight and explosion-prevention type liquid-cooling mine lighting/signal (AC) DC intelligent power supply

Abstract

The invention relates to an airtight and explosion-prevention type liquid-cooling mine lighting / signal (AC) DC intelligent power supply, and solves the problems of load unbalance of a front-stage transformer, unreasonableness, sun resistance, large inductive reactance drop, large reactive loss, short power supply circuit, difficulty in protection and management, frequent accidents, large potential risk, high running, manufacturing and maintenance cost and the like caused by the fact a current mine 127V voltage lighting / signal power supply system employs a 50Hz single-phase AC transformer. A three 50Hz and 660 / 1,140V AC power supply is introduced to an airtight and explosion-prevention type shell, automatic 125V constant-voltage DC power supply is achieved by a three-phase rotation switch, a fuse, rectification, medium-frequency inversion transformation, secondary rectification, filtering and intelligent protection, meanwhile, a direct current can be converted to a 127V / 50Hz alternating current according to a demand, the alternating current and the direct current are supplied in the same line, and the airtight and explosion-prevention type liquid-cooling mine lighting / signal (AC) DC intelligent power supply is applicable to explosion-prevention I / II-type lighting / signal AC-DC power supply system.

Description

[0001] 1. Technical field [0002] The invention specifically relates to the technical field of a mine-used 127V voltage lighting / signal system power supply. [0003] 2. Background technology [0004] As far as the inventor knows, the 127V voltage lighting / signal power supply system used in mining currently uses a 50Hz single-phase AC transformer, resulting in unbalanced and unreasonable loads on the front-stage transformer, large impedance and inductive reactance voltage drop, large reactive power loss, and power supply lines. Short, difficult protection setting, frequent accidents, and great potential safety hazards. The 50Hz single-phase AC transformer is a dry structure, which has difficulty in heat dissipation, large volume and low efficiency. The system uses an explosion-proof enclosure, and harmful gases can pass through the explosion-proof air gap to communicate with each other inside and outside, and its operation, manufacturing, and maintenance costs are extremely hi...

AI Technical Summary

Problems solved by technology

[0004] As far as the inventor knows, the 127V voltage lighting / signal power supply system used in mining currently uses a 50Hz single-phase AC transformer, resulting in unbalanced and unreasonable loads on the front-stage transformer, large impedance and inductive reactance voltage drop, large reactive power loss, and power supply lines. short, difficult to protect and set, frequent accidents, and great potential safety hazards

The 50Hz single-phase AC transformer is a dry structure, which has difficulty in heat dissipation, large volume and low efficiency

Therefore, the single-phase AC lighting / signal system is no longer suitable for the development of modern mines

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