一种防泄漏型天然气掺氢管道密封连接结构
By employing a dual sealing barrier of hydrogen-resistant metal materials and hydrogen-compatible polymer materials in the natural gas pipeline connection structure, and equipping it with a gas leakage detection component, the problem of easy leakage in pipelines under hydrogen-containing environments is solved, achieving high safety and early leakage detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN ZHIHYDRO ENVIRONMENTAL PROTECTION EQUIPMENT CO LTD
- Filing Date
- 2025-09-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing natural gas pipeline connection structures are prone to leakage in hydrogen-containing environments, posing safety hazards. Furthermore, sealing materials are prone to aging and metal parts are prone to cracking.
The main sealing ring, made of a hydrogen-resistant metal material, and the secondary sealing ring, made of a polymer material with excellent hydrogen compatibility, form a double sealing barrier. It is also equipped with a gas leakage detection component, which enables automatic leakage monitoring through a purely mechanical structure.
It improves sealing reliability and durability, enables early detection and quantification of leaks, has a reasonable system design, high safety, and is suitable for hydrogen-blended natural gas transportation.
Smart Images
Figure CN224516217U_ABST
Abstract
Claims
1. A leak-proof sealing connection structure for hydrogen-blended natural gas pipelines, characterized in that, The system includes a pipe 1 (1) and a pipe 2 (2). One end of the pipe 1 (1) is fixedly connected to a flange 1 (3), and one end of the pipe 2 (2) is fixedly connected to a flange 2 (4). The flange 1 (3) and the flange 2 (4) are connected by bolts. The connecting end face of the flange 1 (3) is provided with an annular groove (5) and an annular groove (6). The annular groove (5) is provided with a main sealing ring (7), and the annular groove (6) is provided with a secondary sealing ring (8). The main sealing ring (7) is made of a metal material with hydrogen embrittlement resistance, and the secondary sealing ring (8) is made of a polymer material with excellent hydrogen compatibility. A gas leakage detection component (9) is fixedly connected to the outer wall of the flange 1 (3).
2. The natural gas hydrogen blended pipeline leak-proof sealing connection structure according to claim 1, characterized in that, The outer side wall of the flange (3) is provided with a connecting channel (10) from the outside to the inside. The bottom of the connecting channel (10) is connected to a barrier cavity (11), and the bottom of the barrier cavity (11) is connected to a detection channel (12).
3. The anti-leakage type natural gas hydrogen mixed pipeline sealing connection structure according to claim 2, characterized in that, The gas leakage detection assembly (9) includes a mounting frame (901) and an observation tube (902). The mounting frame (901) and the observation tube (902) are respectively fixedly connected to the outer side wall of the flange (3). The outer side wall of the observation tube (902) is provided with two limiting grooves (903). A rotating sleeve (904) is rotatably connected to the mounting frame (901). A connecting rod (905) is provided in the connecting channel (10). A rotating seat (906) is fixedly connected to one end of the connecting rod (905) near the mounting frame (901).
4. The anti-leakage type natural gas hydrogen mixed pipeline sealing connection structure according to claim 3, characterized in that, A telescopic rod (907) is rotatably connected to the rotating seat (906). The telescopic rod (907) is fixedly connected to the outer wall of the rotating sleeve (904). A rotating rod (908) is also fixedly connected to the outer wall of the rotating sleeve (904). A contact post (909) is fixedly connected to one end of the rotating rod (908) away from the rotating sleeve (904). A spring (910) and a limiting cylinder (917) are fixedly connected to the bottom of the observation tube (902).
5. The anti-leakage type natural gas hydrogen mixed pipeline sealing connection structure according to claim 4, characterized in that, The end of the spring (910) not connected to the observation tube (902) is fixedly connected to a disk (911), and an indicator block (912) is fixedly connected to the outer wall of the disk (911).
6. The anti-leakage type natural gas hydrogen mixed pipeline sealing connection structure according to claim 5, characterized in that, A sealing rod (913) is fixedly connected to one end of the connecting rod (905) away from the mounting bracket (901). Two limiting blocks (914) are provided on the inner side wall of the sealing rod (913). A connecting rod (915) is fixedly connected to one end of the sealing rod (913) away from the connecting rod (905). A rubber head (916) is fixedly connected to one end of the connecting rod (915) away from the sealing rod (913).