Coal mine gas detecting and draught fan automatic control device

Abstract

The present invention relates to a gas detection and automatic fan control system for a coal mine, and comprises an exhaust fan; the input end of the fan is connected with a transducer which is connected with the output end of a SCM through a data / mode converter; the input end of the SCM is connected with a gas consistency sensor through the data / mode converter and a safety fence which are connected in order; the another input and output of the SCM are respectively also connected with corresponding keypads and a LED which shows the measured consistency and sets the consistency. The present invention can realize a normal low-power operation of ventilation during the absence of gas, thereby saving energy; and as the increasing of the gas consistency, the fan can operate and ventilate in high speed, thereby reducing the gas temperature in very short time, preventing the gas explosion and safeguarding the life security.

Description

Technical field: [0001] The technology relates to an automatic control system for gas detection in coal mines and gas removal by fans. Background technique: [0002] For a long time, the proportion of the number of gas accidents in the total number of coal mine accidents has been high. According to expert statistics, gas accidents accounted for nearly 70% of coal mine accidents in which more than 3 people died, and gas accidents accounted for more than 90% of coal mine accidents in which more than 10 people died. In June 2002, a huge gas explosion occurred in Jixi Coal Mine in Heilongjiang, killing 124 people; in January 2003, a gas explosion occurred in Jianxin Coal Mine in Fengcheng, Jiangxi Province, killing 48 miners; in October 2004, a gas explosion occurred in Daping Coal Mine in Henan Province 147 miners were killed in the accident; in November 2004, a gas explosion occurred in the Chenjiashan Coal Mine of Tongchuan Mining Bureau, Shaanxi Province, and 166 miners wer...

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problem that the existing fan cannot exhaust differently with the gas concentration in the well; it provides a ventilation system that maintains a small ventilation operation and saves energy when there is no gas. , The speed of the fan is rapidly increased, the ventilation speed is accelerated, the gas concentration is rapidly reduced, the gas explosion is prevented, and the coal mine gas detection and fan automatic control device is guaranteed to ensure the safety of personnel.

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