一种瓦斯钻孔密封结构
By designing a combination of air guide pipe, fixed cylinder, annular airbag and grouting pipe, a flexible and rigid sealing layer is formed, which solves the problem of borehole leakage, achieves efficient sealing of gas boreholes, and avoids gas leakage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUZHOU UNIV OF TECH
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-17
AI Technical Summary
In existing gas borehole sealing structures, the incomplete fit between the borehole and the drill rod makes it easy for gas to leak through the gap between the outside of the drill rod and the borehole.
The design includes an air guide tube, a fixed cylinder, an annular airbag, and a grouting pipe. The annular airbag is inflated by an air valve to form a flexible sealing layer that fits tightly against the inner wall of the borehole. Sealing grout is then injected to form a rigid sealing layer. The annular airbag and the fixed cylinder form a closed cavity to prevent grout leakage.
This achieves a tight fit between the borehole inner wall and the sealing structure, preventing gas leakage. The sealing structure is stable and not easily loosened, thus improving sealing performance and stability.
Smart Images
Figure CN224515153U_ABST