Coal mine underground switch state detector formed by using resistance-capacitance absorber

Abstract

The invention discloses a coal mine underground switch state detector formed by using a resistance-capacitance absorber, and relates to the field of detectors. The coal mine underground switch state detector comprises a device shell, and the resistance-capacitance absorber, an optoelectronic isolator and a switch protector are arranged in the device shell; the resistance-capacitance absorber is connected with the optoelectronic isolator in parallel, the optoelectronic isolator and the switch protector form a complete circuit, the switch protector is connected with an alarm device in series, and the alarm device is located outside the field. According to the detector, the resistance-capacitance absorber arranged at the load side of the switch is utilized to directly detect whether the three-phase line of the load side of the switch has voltage or not, namely whether the load side of the switch has electricity or not to prove whether the three-phase line of the load side of the switch is in an operation state or an off state, and the signal has authenticity and reliability.

Description

technical field [0001] The invention relates to the field of detectors, in particular to an underground coal mine switch state detector formed by a resistance-capacitance absorber. Background technique [0002] At present, most of the working status of switches in underground coal mines use their own auxiliary contacts to indirectly obtain their own working status, that is, whether they are in the starting state or in the stopping state. This is extremely unreliable, that is, they use themselves to prove themselves. [0003] In the safety monitoring system, there is an important indicator, that is, in the coal mine, once the gas content exceeds the limit, the safety monitoring system should immediately cut off all non-intrinsically safe power supplies in the tunnel (or area), whether to cut off depends on the Whether there is still electricity on the load side of the control switch, it is obviously unreliable to use its auxiliary contacts to judge whether there is electricit...

AI Technical Summary

Problems solved by technology

[0003] In the safety monitoring system, there is an important indicator, that is, in the coal mine, once the gas content exceeds the limit, the safety monitoring system should immediately cut off all non-intrinsically safe power supplies in the tunnel (or area), whether to cut off depends on the Whether there is still electricity on the load side of the control switch, it is obviously unreliable to use its auxiliary contacts to judge whether there is electricity

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