Mine explosion-proof and intrinsically-safe type intelligent alarm vacuum switch

Abstract

The invention relates to a mine explosion-proof and intrinsically-safe type intelligent alarm vacuum switch. The switch is technically characterized by comprising an upper computer, a centralized-control mainboard, a disconnecting switch assembly, a contact assembly, a comprehensive leakage base plate and an intrinsically-safe keyboard, wherein the upper computer is connected with the centralized-control mainboard to monitor communication equipment states and realize an alarm function; the upper computer is connected with the disconnecting switch assembly, the contact assembly, the comprehensive leakage base plate and the intrinsically-safe keyboard to realize an information collection or control command sending function; the comprehensive leakage base plate is connected with a zero-sequence current transformer to collect leakage currents so as to realize a leakage protection function; and the contact assembly is connected with controlled equipment to realize a function of starting and stopping control of the controlled equipment. According to the switch, possible faults between two sets of equipment and man-made operation fault risks are greatly reduced, a safer and more reliable work environment is provided for mine operations, and the switch has the characteristics of high automation degree, safety, reliability, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of vacuum switches, in particular to a mine explosion-proof and intrinsically safe intelligent alarm vacuum switch. Background technique [0002] In the power supply and distribution system of coal mines, the terminal execution equipment uses a large number of vacuum switches (vacuum combined magnetic starters) to break and protect the electric drive and some lighting equipment, that is, when there is overload, short circuit, It can automatically cut off the power supply when there is a phase failure or leakage. Existing vacuum switches use their breaking and protection functions to start or stop various equipment, such as scraper conveyors, pumps, trough belt conveyors, crushers, reloaders, etc. These switches need to be operated by another central The master control device issues signals such as instructions or node control pulses. In general, since the starting and stopping of these devices are judged b...

AI Technical Summary

Problems solved by technology

However, with the prominence of underground safety issues in coal mines and the increase in underground electrification equipment, its complexity has greatly increased, and the possible failures between the original two sets of equipment and the risk of human-made operational failures have also greatly increased, such as the control node of the central controller If a fault occurs, its normally open node is shorted causing it to become closed, which causes the vacuum switch to close, causing some kind of equipment to start, and at this time, if someone is working on this equipment, it will cause a major safety incident, which It is necessary to increase the safety factor and early warning requirements on the action equipment, which cannot be met in the existing switch system

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