Alarm and automatic ventilation system for monitoring coal bed gas leakage

The invention provides a coal bed gas leakage monitoring, alarming and automatic ventilating system, and relates to the technical field of ventilating systems.The system comprises a control cabinet, an anti-explosion exhaust fan and a driving seat, a guide rail is arranged on one side in the driving seat, a driving part is arranged on the other side in the driving seat, a guide groove is formed in the guide rail, a rack is movably arranged in the guide groove, and the rack is connected with the control cabinet; one end of the rack extends out of the driving seat, the rack is driven by a driving part to move, one end of the rack is provided with an adjusting fastener, and the adjusting fastener is connected with a window leaf of a window; the concentration of methane in air is monitored through the methane sensor, when the concentration of the methane in the air exceeds the standard, a monitoring signal is transmitted to the single chip microcomputer, the single chip microcomputer receives the signal, the anti