A sealing device for coal mine gas extraction

CN122304655APending Publication Date: 2026-06-30SHANXI YANGMEISI JIAZHUANG COAL IND CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: SHANXI YANGMEISI JIAZHUANG COAL IND CO LTD
Filing Date: 2026-05-22
Publication Date: 2026-06-30

AI Technical Summary

Technical Problem

Existing coal mine gas drainage sealing devices suffer from problems such as simple and easily aged sealing structures, insufficient fixation reliability, cumbersome operation and poor anti-loosening effect, and poor structural adaptability, leading to gas leakage and device loosening, and failing to meet the stringent requirements of high-gas mines.

Method used

The sealing cap uses an expansion mechanism and fixing device, including an extension column, threaded rod, threaded block, connecting rod, fixing block, rubber sheet, clamp, silicone ring, and hook, forming a linkage structure. Through the interference fit of the sealing ring, the fixing block adhering to the inner wall of the pipe, and the hook and clamp on the outer wall, a three-layer seal and double fixing are achieved, simplifying the operation steps and enhancing stability.

Benefits of technology

It improves the sealing and fixing reliability of gas plugs, reduces the risk of gas leakage, simplifies the operation process, and reduces the failure rate and maintenance cost of the equipment.

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Abstract

This invention belongs to the technical field of coal mine safety equipment and discloses a sealing device for coal mine gas extraction, including a pipe, a clamp, and a sealing cap. One side of the sealing cap has an expansion mechanism and a fixing device, and the inside of the sealing cap has a linkage structure. This invention uses a three-layer seal around the pipe opening—the sealing ring of the sealing column with an interference fit, the rubber sheet of the fixing block against the inner wall of the pipe, and the silicone ring of the clamp against the outer wall of the pipe—to firmly block gas and reduce the risk of leakage. Adjusting the fixing block only requires three steps: "pull the nut, tighten the nut, loosen the nut." The push-pull spring automatically locks the threaded rod, eliminating the need for additional locking components. The clamp hook automatically hooks the clamp using a return spring, eliminating the need for manual clamping, saving considerable time during underground operations and facilitating practical application and operation.

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