Automatic opening-closing air door of coal mine underground fire area air inlet-return roadway
The utility model provides an automatic opening and closing air door of an air inlet and return roadway of an underground coal mine fire area. The device comprises a masonry wall body, a gas detectionassembly and a movable window door, a fireproof expansion sealing strip is arranged at the periphery...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model provides an automatic opening and closing air door of an air inlet and return roadway of an underground coal mine fire area. The device comprises a masonry wall body, a gas detectionassembly and a movable window door, a fireproof expansion sealing strip is arranged at the periphery of the movable window door; an installation cavity is formed in one side of a masonry wall of themovable window door. A brake device is arranged in the mounting cavity; the braking device comprises an electromagnetic valve, an oil pump, an alternating-current contactor, a sensor data monitoring feedback controller, an oil pipe, a hydraulic ejector rod, a fixing support and a power source. The piston end of the hydraulic ejector rod is connected with the movable window door, the hydraulic ejector rod is fixedly connected to a masonry wall through a fixing support, and the input end of the sensor data monitoring feedback controller is connected with the gas detection assembly through a collection cable. According to |
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