Ferrule type mounting structure for high-pressure hydrogen pipeline
Through the tuck-type installation structure, the cooperation of nuts and limit bolts is used to solve the problems of unsolid connection and poor sealing of high-pressure hydrogen pipelines, and efficient hydrogen pipeline connection is achieved to prevent leakage and looseness, improving safety and pressure resistance.
Patent Information
- Application Number
- CN202422628008.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The traditional hydrogen pipeline installation method cannot meet the high-pressure transportation needs, and there are sealing and safety problems, especially the joints are prone to loosening and leaking.
The sleeve-type installation structure is adopted, including pipe joints, clamps, nuts and limit bolts. Through the threaded connection and the matching of limit bolts, the connection firmness and sealing performance are ensured. The inclined compression surface of the nut is tightened to each other with the arc-shaped convex surface of the clamp, and is embedded in the limit slot through the limit block of the limit bolt to enhance pressure resistance.
It realizes a firm connection of high-pressure hydrogen pipelines, ensures reliable sealing performance, prevents hydrogen leakage and loose joints, and improves safety and pressure resistance.
Smart Images
Figure CN223178363U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pipe fitting installation, and particularly relates to a ferrule type installation structure for a high-pressure hydrogen pipeline. Background Technique
[0002] 99.999% hydrogen is the main energy material for hydrogen energy vehicles. Inside a hydrogen energy vehicle, there is a hydrogen fuel cell that converts hydrogen into electrical energy, and then an electric motor drives the vehicle to run.
[0003] Process pipelines, as an important part of hydrogen production devices, play a crucial role. With the progress of technology, the equipment manufacturing industry has developed by leaps and bounds, and the installation requirements for process pipelines are also getting higher and higher. The traditional installation method for hydrogen pipelines cannot meet the development needs of the modern hydrogen energy industry. If the transportation volume is increased, the pipeline diameter needs to be enlarged, but economic and safety problems will arise. With continuous technological improvement, high-pressure transportation is a relatively ideal method. However, the installed joints are not sufficient to withstand too high pressure and need to be improved. Content of the Utility Model
[0004] To solve the above problems, the utility model discloses a ferrule type installation structure for a high-pressure hydrogen pipeline, which has firm connection, safe and reliable sealing performance, strong pressure resistance, and can effectively prevent hydrogen leakage and joint loosening.
[0005] To achieve the above purpose, the technical solution of the utility model is as follows:
[0006] The ferrule type installation structure for a high-pressure hydrogen pipeline includes a pipe joint, a ferrule and a nut. A through hole is provided inside the pipe joint. A step is provided in the middle of the inner wall of the pipe joint. Sealing rings are provided on both sides of the step. The inner wall of the pipe joint is a conical surface. The middle part of the outside of the pipe joint is a hexahedron. External threads are provided at both ends of the outside of the pipe joint. A steel pipe is inserted into the pipe joint and is in close contact with the sealing ring. The ferrule is sleeved outside the steel pipe. A plurality of limiting grooves are provided on the outer surface of the middle part of the ferrule. An inclined surface corresponding to the conical surface is provided at the front end of the outside of the ferrule. An arc convex surface is provided at the rear end of the outside of the ferrule. The nut is arranged at the rear end of the ferrule. The pipe joint and the nut are in threaded cooperation. An inclined pressing surface is provided at the rear end of the nut. The inclined pressing surface abuts against the arc convex surface. A screw hole is provided on the side surface of the nut. A limiting bolt passes through the screw hole, and a limiting block at the front end of the limiting bolt is embedded in the limiting groove.
[0007] As an improvement of the utility model, a pigment layer is coated on the surface of the limiting bolt below the middle part.
[0008] The beneficial effects of the utility model are as follows:
[0009] The utility model discloses a ferrule type installation structure for high-pressure hydrogen pipelines. The inclined pressing surface at the rear end of the nut presses against the arc convex surface of the ferrule. In addition, a limit bolt is added, which has firm connection, reliable sealing performance, strong pressure resistance, and can effectively prevent hydrogen leakage and joint loosening. Description of the Drawings
[0010] Figure 1 It is an exploded view of the components of the utility model.
[0011] Figure 2 It is a schematic diagram of the pipe joint described in the utility model.
[0012] Figure 3 It is a schematic diagram of the ferrule described in the utility model.
[0013] Figure 4 It is a schematic diagram of the nut described in the utility model.
[0014] Figure 5 It is an installation diagram of the utility model.
[0015] Figure 6 It is a schematic diagram of the limit bolt described in the utility model.
[0016] List of Drawing Reference Signs:
[0017] 1. Pipe joint, 2. Ferrule, 3. Nut, 4. Through hole, 5. Step, 6. Sealing ring, 7. Tapered surface, 8. Hexahedron, 9. External thread, 10. Steel pipe, 11. Limit groove, 12. Inclined surface, 13. Arc convex surface, 14. Inclined pressing surface, 15. Threaded hole, 16. Limit bolt, 17. Limit block, 18. Pigment layer. Detailed Embodiments
[0018] The following further clarifies the utility model in conjunction with the drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the utility model and not to limit the scope of the utility model.
[0019] As shown in the figure, the ferrule-type installation structure of the high-pressure hydrogen pipeline described in the present utility model includes a pipe joint 1, a ferrule 2 and a nut 3. A through hole 4 is provided inside the pipe joint 1. A step 5 is provided in the middle of the inner wall of the pipe joint 1. Sealing rings 6 are provided on both sides of the step 5. The inner wall of the pipe joint 1 is a conical surface 7. The middle part of the outside of the pipe joint 1 is a hexahedron 8. External threads 9 are provided at both ends of the outside of the pipe joint 1. A steel pipe 10 is inserted into the pipe joint and is in close contact with the sealing ring 6. The ferrule 2 is sleeved outside the steel pipe 10. A plurality of limiting grooves 11 are provided on the outer surface of the middle part of the ferrule 2. An inclined surface 12 corresponding to the conical surface 7 is provided at the front end of the outside of the ferrule 2. An arc convex surface 13 is provided at the rear end of the outside of the ferrule. The nut 3 is arranged at the rear end of the ferrule 2. The pipe joint 1 and the nut 3 are matched by threads. An inclined pressing surface 14 is provided at the rear end of the nut 3. The inclined pressing surface 14 abuts against the arc convex surface 13. A screw hole 15 is provided on the side surface of the nut 3. A limiting bolt 16 passes through the screw hole 15. A limiting block 17 at the front end of the limiting bolt is embedded in the limiting groove 11.
[0020] During installation, first place the sealing ring 6 inside the pipe joint 1, take out the steel pipe, sleeve the nut 3 and the ferrule 2 on the steel pipe. The end of the steel pipe extends into the through hole 4 and is in close contact with the sealing ring 6. Then push the ferrule 2 forward. The inclined surface 12 at the front end of the ferrule 2 fits with the conical surface 7. Then push the nut 3 forward. The nut 3 and the pipe joint 1 are tightened by threads. At this time, the inclined pressing surface 14 abuts against the arc convex surface 13 and gets tighter and tighter as it is tightened. When it stops moving, then tighten the nut for 2 / 3 - 4 / 3 turns; in addition, add a limiting bolt 16. When the nut is about to be tightened, the limiting bolt 16 passes through the screw hole 15, and the tip of the limiting block 17 at the front end of the limiting bolt is embedded 1 - 2 mm into the limiting groove 11. Such a structure has a firm connection, a safe and reliable sealing performance, a strong pressure resistance ability, and can effectively prevent hydrogen leakage and joint loosening (there are 8 - 12 limiting grooves, which are evenly arranged on the outer surface of the middle part of the ferrule. The length of the nut is calculated in advance, and when tightening, the limiting block 17 is directly opposite to the middle part of the ferrule).
[0021] In order to ensure that the tip of the limiting block 17 at the front end of the limiting bolt is embedded in the limiting groove 11, a pigment layer 18 is coated on the surface of the limiting bolt 16 below the middle part of the limiting bolt. If the pigment layer cannot be seen after the limiting bolt 16 is tightened, it means that it has been embedded in the limiting groove 11. If the pigment layer can still be seen outside, it means that the tip of the limiting block 17 has not been embedded in the limiting groove 11, and the nut needs to be tightened slightly more to make the tip of the limiting block 17 in place.
[0022] It should be noted that the above content only illustrates the technical idea of the present utility model and cannot be used to limit the protection scope of the present utility model. For those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and retouches can be made, and these improvements and retouches all fall within the protection scope of the claims of the present utility model.
Claims
1. High-pressure hydrogen pipeline compression fitting installation structure, characterized in that: It includes a pipe joint (1), a ferrule (2) and a nut (3). A through hole (4) is provided inside the pipe joint (1). A step (5) is provided in the middle of the inner wall of the pipe joint (1). Sealing rings (6) are provided on both sides of the step (5). The inner wall of the pipe joint (1) is a conical surface (7). The middle part of the outside of the pipe joint (1) is a hexahedron (8). External threads (9) are provided at both ends of the outside of the pipe joint (1). A steel pipe (10) is inserted into the pipe joint and is in close contact with the sealing ring (6). The ferrule (2) is sleeved on the outside of the steel pipe (10). A plurality of limiting grooves (11) are provided on the outer surface of the middle part of the ferrule (2). An inclined surface (12) corresponding to the conical surface (7) is provided at the front end of the outside of the ferrule (2). An arc-shaped convex surface (13) is provided at the rear end of the outside of the ferrule. The nut (3) is arranged at the rear end of the ferrule (2). The pipe joint (1) and the nut (3) are in threaded cooperation. An inclined pressing surface (14) is provided at the rear end of the nut (3). The inclined pressing surface (14) abuts against the arc-shaped convex surface (13). A screw hole (15) is provided on the side surface of the nut (3). A limiting bolt (16) passes through the screw hole (15). A limiting block (17) at the front end of the limiting bolt is embedded in the limiting groove (11).
2. The ferrule type installation structure of the high-pressure hydrogen pipeline according to claim 1, wherein: A pigment layer (18) is coated on the surface of the limiting bolt (16) below the middle part thereof.