Hydraulic support operation valve structure for coal mine
The invention discloses a hydraulic support operation valve structure for a coal mine. The hydraulic support operation valve structure comprises a hydraulic valve top cover, a limiting rod, an operating rod and a rotating shaft. The operating rod is mounted on the upper portion of the hydraulic valv...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a hydraulic support operation valve structure for a coal mine. The hydraulic support operation valve structure comprises a hydraulic valve top cover, a limiting rod, an operating rod and a rotating shaft. The operating rod is mounted on the upper portion of the hydraulic valve top cover through the rotating shaft, a cavity in the length direction of the operating rod is formed inside the operating rod, and a limiting rod is arranged in the cavity and can slide up and down along the cavity. Limiting holes are formed in the top and the two sides of the hydraulic valve topcover correspondingly. According to the hydraulic support operation valve structure for the coal mine, after a limiting device is mounted on a hydraulic support operation valve, the limiting functionof the hydraulic support operation valve can be achieved, misoperation such as abnormal falling, rising and moving of a hydraulic support due to the fact that downhole personnel mistakenly operate the hydraulic support operat |
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