Flexible connection leak-proof quick sealing joint for gas pipeline
By introducing a multi-seal structure at the gas pipeline connection, the leakage problem caused by a single seal ring is solved, achieving a multi-seal effect and improving the sealing performance and ease of use of the gas pipeline.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DEGAO ZHIYUAN (NANTONG) TECHNOLOGY CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-29
AI Technical Summary
Existing gas pipeline sealing joints typically rely on a single sealing ring for sealing. The limited number and location of these rings result in poor sealing performance and a high risk of gas leakage.
It adopts a multi-seal structure, including a connecting ring, a fixed ring, a third sealing ring, a second sealing ring, a connecting groove, a sliding seat, a rotating rod, a slider, a connecting rod, a sealing retaining ring, and a first sealing ring. Through the cooperation of threaded connections and sliding components, a multi-seal effect is achieved.
It improves the sealing performance of gas pipeline connections, prevents gas leakage, and enhances ease of use.
Smart Images

Figure CN224301548U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing joint technology, specifically a flexible connection leak-proof quick-sealing joint for gas pipelines. Background Technology
[0002] Gas pipelines are tubular infrastructures used to transport natural gas, liquefied petroleum gas, manufactured gas, and other gas-powered fuels. They are an important component of urban energy supply systems. Through a network of pipelines of different materials, pressure levels, and laying methods, they deliver gas from gas sources to households, industrial and commercial users, and various gas-powered appliances. Sealing joints are used in the operation of gas pipelines.
[0003] Existing sealing joints typically rely on a single sealing ring for sealing. The limited number and placement of these rings lack multi-layered protection, resulting in generally poor overall sealing performance. This can lead to gas leaks during pipeline gas transport, posing a significant safety hazard and making them inconvenient to use. Therefore, we propose a flexible, leak-proof, quick-sealing joint for gas pipelines. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a flexible, leak-proof, quick-sealing joint for gas pipelines. It solves the problem that sealing joints typically rely on a single sealing ring for sealing, with limited number and placement of the rings, lacking multiple layers of protection and generally poor sealing performance. This can lead to gas leaks during gas pipeline transportation, posing a potential hazard of gas leakage.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A flexible, leak-proof, quick-sealing connector for gas pipelines includes a connector head. A fixing ring is symmetrically fixedly connected to the inner wall of the connector head. A third sealing ring is provided on one side of the fixing ring. A second sealing ring is symmetrically provided on the outer side of the connector head. A connecting ring is symmetrically threaded inside the connector head. A gas pipeline is fixedly connected to one end of the connecting ring. A connecting groove for cooperating with the second sealing ring is opened inside the gas pipeline. A fixing seat is fixedly connected to the outer side of the connector head. A sliding seat is slidably connected to the inner wall of the fixing seat. A rotating rod is symmetrically rotatably connected to one side of the sliding seat. A slider is symmetrically slidably connected inside the fixing seat. The rotating rod and the slider are rotatably connected. A connecting rod is fixedly connected to one side of the slider. A sealing retaining ring is fixedly connected to one end of the connecting rod. A first sealing ring is provided inside the sealing retaining ring. The arrangement of the first, second, and third sealing rings achieves a multiple sealing effect, preventing gas leakage.
[0007] Preferably, the outer side of the connecting ring is provided with an external thread, and the inside of the connector is provided with an internal thread that mates with the external thread. The external and internal threads facilitate the connection and fixation between the gas pipeline and the connector by means of threaded connection.
[0008] Preferably, a fixing block is fixedly connected inside the fixing base, and a lead screw is rotatably connected between the fixing block and the fixing base. The sliding seat is threadedly connected to the lead screw, and a knob is fixedly connected to one end of the lead screw. The knob drives the lead screw to rotate, and the rotation of the lead screw drives the sliding seat to slide along the inner wall of the fixing base.
[0009] Preferably, the sliding seat is in contact with the inner wall of the fixed seat, and the movement of the sliding seat can be limited by the contact between the sliding seat and the inner wall of the fixed seat.
[0010] Preferably, a protective ring is fixedly connected to one side of the fixed base, and a protective cover is threadedly connected to the outer side of the protective ring. The knob can be shielded and protected by the protective cover and the protective ring.
[0011] Preferably, a limiting rod is fixedly connected to the inner wall of the fixed base, and the slider is slidably connected to the limiting rod. The movement of the slider can be limited by the setting of the limiting rod.
[0012] This utility model provides a flexible, leak-proof, quick-sealing joint for gas pipelines. Compared with existing technologies, it has the following advantages: This flexible, leak-proof, quick-sealing joint for gas pipelines, through the arrangement of a connecting ring, a fixing ring, a third sealing ring, a second sealing ring, a connecting groove, a lead screw, a sliding seat, a rotating rod, a slider, a connecting rod, a sealing retaining ring, and a first sealing ring, achieves the function of connecting the joint and the gas pipeline. It also provides multiple layers of sealing protection at the connection point. The multiple sets of flexible sealing rings achieve a multi-layered sealing effect, preventing gas leakage and facilitating use. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model.
[0014] Figure 2 This is a schematic diagram of the gas pipeline structure of this utility model.
[0015] Figure 3 This is a schematic diagram of the internal structure of the connector of this utility model.
[0016] Figure 4 This is a structural schematic diagram of the fixing base of this utility model.
[0017] Figure 5 This is a schematic diagram of the internal structure of the fixing base of this utility model.
[0018] Figure 6 This is a schematic diagram of the slider of this utility model.
[0019] In the diagram: 1. Gas pipeline; 2. Connector; 3. First sealing ring; 4. Sealing retainer ring; 5. Fixing seat; 6. Connecting rod; 7. Connecting ring; 8. External thread; 9. Connecting groove; 10. Second sealing ring; 11. Internal thread; 12. Third sealing ring; 13. Fixing ring; 14. Protective cover; 15. Rotating rod; 16. Knob; 17. Protective ring; 18. Lead screw; 19. Fixing block; 20. Limiting rod; 21. Sliding block; 22. Sliding seat. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figures 1 to 6 This utility model provides a technical solution:
[0022] A flexible, leak-proof, quick-sealing connector for gas pipelines includes a connector 2. A fixing ring 13 is symmetrically fixedly connected to the inner wall of the connector 2. A third sealing ring 12 is provided on one side of the fixing ring 13. A second sealing ring 10 is symmetrically provided on the outer side of the connector 2. A connecting ring 7 is symmetrically threaded inside the connector 2. One end of the connecting ring 7 is fixedly connected to a gas pipeline 1. A connecting groove 9, which mates with the second sealing ring 10, is opened inside the gas pipeline 1. A fixing seat 5 is fixedly connected to the outer side of the connector 2. A sliding seat 22 is slidably connected to the inner wall of the fixing seat 5. A rotating rod 15 is symmetrically rotatably connected to one side of the sliding seat 22. A slider 21 is symmetrically slidably connected inside the fixing seat 5. The rotating rod 15 and the slider 21 are rotatably connected. A connecting rod 6 is fixedly connected to one side of the slider 21. One end of the connecting rod 6 is fixedly connected to... A sealing ring 4 is provided, and a first sealing ring 3 is provided inside the sealing ring 4. The gas pipeline 1 and the connector 2 can be connected and fixed by a threaded connection. After installation, the connection can be initially sealed by the setting of the fixing ring 13 and the third sealing ring 12. The connection can be further sealed by the setting of the second sealing ring 10. The movement of the sliding seat 22 drives the rotating rod 15 to rotate. The rotation of the rotating rod 15 drives the two sets of sliders 21 to slide. The sliders 21 drive the sealing ring 4 to move through the connecting rod 6, so that the sealing ring 4 moves to the connection between the gas pipeline 1 and the connector 2. The first sealing ring 3 can further seal the connection. The multiple sets of flexible sealing rings can achieve a multiple sealing effect to prevent gas leakage.
[0023] Furthermore, the outer side of the connecting ring 7 is provided with an external thread 8, and the inside of the connector 2 is provided with an internal thread 11 that mates with the external thread 8. The external thread 8 and the internal thread 11 facilitate the connection and fixation between the gas pipeline 1 and the connector 2 by means of threaded connection.
[0024] Furthermore, a fixing block 19 is fixedly connected inside the fixing base 5, and a lead screw 18 is rotatably connected between the fixing block 19 and the fixing base 5. The sliding seat 22 is threadedly connected to the lead screw 18, and a knob 16 is fixedly connected to one end of the lead screw 18. The knob 16 drives the lead screw 18 to rotate, and the rotation of the lead screw 18 drives the sliding seat 22 to slide along the inner wall of the fixing base 5.
[0025] Furthermore, the sliding seat 22 is in contact with the inner wall of the fixed seat 5. By the contact between the sliding seat 22 and the inner wall of the fixed seat 5, the movement of the sliding seat 22 can be limited, preventing the sliding seat 22 from deviating during movement.
[0026] Furthermore, a protective ring 17 is fixedly connected to one side of the fixed base 5, and a protective cover 14 is threadedly connected to the outer side of the protective ring 17. The protective cover 14 and the protective ring 17 can shield and protect the knob 16 to prevent accidental contact.
[0027] Furthermore, a limiting rod 20 is fixedly connected to the inner wall of the fixed base 5, and the slider 21 is slidably connected to the limiting rod 20. The movement of the slider 21 can be limited by the setting of the limiting rod 20 to prevent the slider 21 from deviating when moving.
[0028] Working principle:
[0029] In use, the gas pipeline 1 and the connector 2 can be connected and fixed by a threaded connection. After installation, the connection can be initially sealed by the fixing ring 13 and the third sealing ring 12. The connection can be further sealed by the second sealing ring 10. Unscrew the protective cover 14 and turn the knob 16. The knob 16 drives the screw 18 to rotate. The rotation of the screw 18 drives the sliding seat 22 to slide along the inner wall of the fixing seat 5. The movement of the sliding seat 22 drives the rotating rod 15 to rotate. The rotation of the rotating rod 15 drives the two sets of sliders 21 to slide along the limiting rod 20. The sliders 21 drive the sealing ring 4 to move through the connecting rod 6, so that the sealing ring 4 moves to the connection between the gas pipeline 1 and the connector 2. The first sealing ring 3 can further seal the connection. The multiple sets of flexible sealing rings can achieve multiple sealing effects to prevent gas leakage and facilitate use.
[0030] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A flexible connection leak-proof quick-sealing joint for gas pipelines, comprising a connector (2), characterized in that: The inner wall of the connector (2) is symmetrically fixed with a fixing ring (13), and a third sealing ring (12) is provided on one side of the fixing ring (13). The outer side of the connector (2) is symmetrically provided with a second sealing ring (10). The inner side of the connector (2) is symmetrically threaded with a connecting ring (7). One end of the connecting ring (7) is fixedly connected with a gas pipeline (1). The inner side of the gas pipeline (1) is provided with a connecting groove (9) that cooperates with the second sealing ring (10). The outer side of the connector (2) is fixedly connected with a fixing seat (5). The inner wall of the fixing seat (5) is slidably connected with a sliding seat (22). One side of the sliding seat (22) is symmetrically rotatably connected with a rotating rod (15). The inner side of the fixing seat (5) is symmetrically slidably connected with a slider (21). The rotating rod (15) and the slider (21) are rotatably connected. One side of the slider (21) is fixedly connected with a connecting rod (6). One end of the connecting rod (6) is fixedly connected with a sealing retaining ring (4). The inner side of the sealing retaining ring (4) is provided with a first sealing ring (3).
2. The gas pipeline flexible connection leak-proof quick-sealing joint according to claim 1, characterized in that: The outer side of the connecting ring (7) is provided with an external thread (8), and the inside of the connector (2) is provided with an internal thread (11) that cooperates with the external thread (8).
3. The gas pipeline flexible connection leak-proof quick-sealing joint according to claim 1, characterized in that: The fixed base (5) is internally fixedly connected to a fixed block (19), and a screw rod (18) is rotatably connected between the fixed block (19) and the fixed base (5). The sliding seat (22) is threadedly connected to the screw rod (18), and a knob (16) is fixedly connected to one end of the screw rod (18).
4. The gas pipeline flexible connection leak-proof quick-sealing joint according to claim 1, characterized in that: The sliding seat (22) is in contact with the inner wall of the fixed seat (5).
5. A quick-sealing joint for leak-proof flexible connection of gas pipeline according to claim 1, characterized in that: A protective ring (17) is fixedly connected to one side of the fixed base (5), and a protective cover (14) is threadedly connected to the outer side of the protective ring (17).
6. A quick-sealing joint for leak-proof flexible connection of gas pipeline according to claim 1, characterized in that: The inner wall of the fixed seat (5) is fixedly connected to the limiting rod (20), and the slider (21) is slidably connected to the limiting rod (20).