Underground coal seam roadway gas drainage intelligent control system and its control method

Abstract

The invention provides an intelligent control system for gas extraction of an underground coal roadway and a control method of the intelligent control system, and belongs to intelligent regulation and control of a gas extraction system of a coal mine. The intelligent control system comprises a regulation system and an alarming system; and the regulation system consists of a gas concentration sensor, a flow sensor, an electric valve, a regulation signal acquiring circuit, a single-chip microcomputer, a relay driving circuit and a valve driving circuit. According to a method of the regulation system, the opening degree of the electric valve is sequentially regulated from big to small; the maximum value of pure flow is found out under the condition that requirements on minimum concentration of gas extraction are met; the electric valve is set at the opening degree corresponding to the maximum pure flow and is automatically reset after a period of time; and the above procedures are carried out again. The alarming system consists of a gas concentration sensor, an alarming acquiring circuit, a single-chip microcomputer, a liquid crystal display circuit and a buzzer circuit. According to a method of the alarming system, alarming signals of the gas concentration sensor are processed through the single-chip microcomputer; the buzzer circuit gives an alarm; and the liquid crystal display circuit displays a gas leaking place. By the intelligent control system for gas extraction of the underground coal roadway, extraction is controlled intelligently and an optimum extraction effect is achieved.

Description

technical field [0001] The invention relates to an intelligent control system and control method for gas drainage in an underground coal seam roadway, and is especially suitable for the optimal regulation of the pure flow of gas in the gas drainage pipeline of the underground coal seam roadway and the judgment of the gas leakage fault of the drainage borehole. Background technique [0002] At present in my country, the concentration and negative pressure adjustment of pipelines for gas drainage in underground coal seam roadways is entirely controlled by manual control, only relying on experience, without any specific theory and method, and there are serious sealing and joint hole leakage in the drainage boreholes Problems, air leakage problems cannot be found in time, time-consuming and labor-intensive. Chinese invention patent (application number 201010591680.0) discloses a device for automatic regulation and early warning of underground gas drainage concentration. To achie...

AI Technical Summary

Problems solved by technology

However, these devices only pay attention to the concentration of gas drainage regulation, and ignore the flow rate. If the flow rate is too small, the extraction speed will be too slow, which will affect the extraction cycle, and the alarm system is not perfect, which cannot solve the problem of gas leakage.

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