Leakage-proof mechanical sealing device for gas pipeline
By installing a mechanical sealing device at the weld joint of the gas pipeline, a secondary seal is achieved by using a combination of a ring plate and a rubber layer, which solves the problem of gas leakage at the weld joint and enables rapid detection and repair.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU SILVERKEY AMPEREX TECH CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-05-05
AI Technical Summary
Existing gas pipelines are prone to leaks at welded joints, and detection is inconvenient, leading to gas leaks.
A mechanical sealing device is used at the connection between the first and second pipes. The weld is sealed by the bonding of the first and second annular plates and the sealing of the rubber layer. The combination structure of the airtight elastic layer and the top column is used to quickly detect the location of the leak.
It achieves secondary sealing at the weld, preventing significant gas leakage, and can quickly locate and repair leaks, thus improving detection efficiency.
Smart Images
Figure CN224201545U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of gas pipeline technology, specifically a gas pipeline anti-leakage mechanical seal device. Background Technology
[0002] Gas pipelines are a transmission system consisting of the pipeline body, valves, connectors and auxiliary facilities. They are pressure-resistant and sealing systems used to distribute gas from gas sources (such as gas fields and liquefaction stations) to industrial, commercial and residential terminals.
[0003] In existing technologies, gas pipelines generally require pipe welding during extension installation. However, when detecting leaks in gas pipelines, it is found that most leaks are detected at the pipe connection welds, which is inconvenient to detect.
[0004] Therefore, this utility model provides a mechanical seal device for preventing gas pipeline leakage. Utility Model Content
[0005] In order to overcome the shortcomings of the existing technology and solve the problems raised in the background art.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A gas pipeline anti-leakage mechanical seal device of this utility model includes a first pipeline and a second pipeline; the connecting ends of the first pipeline and the second pipeline are welded together; a first fixing ring is fixedly connected to the outer wall of the first pipeline; a first L-shaped rod is fixedly connected to the side wall of the first fixing ring, and the other end of the first L-shaped rod is fixedly connected to the outer wall of the first pipeline; a first circular groove is formed on the first fixing ring, and a first circular ring plate is slidably connected within the first circular groove; a second fixing ring is fixedly connected to the outer wall of the second pipeline; a second L-shaped rod is fixedly connected to the side wall of the second fixing ring, and the other end of the second L-shaped rod is fixedly connected to the outer wall of the second pipeline; a second circular groove is formed on the second fixing ring, and a second circular ring plate is slidably connected within the second circular groove; the first circular ring plate and the second circular ring plate are respectively installed on the side walls of the first fixing ring and the second fixing ring through a first sealing element; the first circular ring plate and the second circular ring plate are sealed together by a second sealing element.
[0007] Preferably, the first sealing element includes a first arc groove and a second arc groove; the first arc groove is formed on the side wall of the first fixing ring, and the first arc groove and the first through groove are interconnected; the second arc groove is formed on the side wall of the second fixing ring, and the second arc groove and the second through groove are interconnected; a first annular post is fixedly connected to the end of the first annular plate; a second annular post is fixedly connected to the end of the second annular plate; a rubber layer is fixedly connected to the outer side wall of the first annular post and the second annular post; the first annular post and the second annular post are respectively installed on the side wall of the first fixing ring and the second fixing ring by bolts.
[0008] Preferably, the second sealing element includes an arc groove; a set of arc grooves are formed on the end sidewall of the first annular plate; a set of arc protrusions are fixedly connected to the end sidewall of the second annular plate; and a rubber layer is fixedly connected to the outer sidewall of the arc protrusions.
[0009] Preferably, a first cavity is formed in both the first annular plate and the second annular plate; an air inlet is formed at the bottom of the first cavity; a connecting groove is formed at the top of the first cavity; and a measuring element is formed in the first cavity.
[0010] Preferably, the measuring element includes a top post; an airtight elastic layer is fixedly connected to the first cavity; a top post is fixedly connected to the top of the airtight elastic layer, and the top post extends out through a connecting groove.
[0011] Preferably, an air nozzle is provided on the outer wall of the second annular plate.
[0012] The beneficial effects of this utility model are as follows:
[0013] 1. The gas pipeline leak-proof mechanical seal device of this utility model, at the welding position of the first and second pipelines, pushes the first and second annular columns to make the first and second annular plates fit together, allowing the arc protrusion to be inserted into the arc groove. At the same time, the first annular column is inserted into the first arc groove, and the second annular column is inserted into the second arc groove. Then, it is fixed by bolts. At the same time, the rubber layer is set to perform mechanical sealing operation at the weld joint. When gas leakage occurs at the weld joint of the first and second pipelines, the first and second annular plates can be used to perform secondary sealing operation. When gas leakage occurs at the weld joint, it can play a secondary sealing role, play a gas leakage protection role, and prevent large-scale gas leakage.
[0014] 2. The gas pipeline anti-leakage mechanical seal device of this utility model, when a gas leak occurs at the weld, the gas will fill the cavity composed of the first annular plate, the second annular plate, the first fixed ring, and the second fixed ring. Then the gas will enter the first cavity through the air intake, causing the airtight elastic layer to bulge and the top column to be pushed out of the connecting groove, thereby serving as a warning function and facilitating the rapid detection of the leak location, enabling rapid repair of the leaking weld. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings.
[0016] Figure 1 This is a perspective view of the present invention;
[0017] Figure 2 This is a cross-sectional view of the present invention;
[0018] Figure 3 yes Figure 2 Enlarged view of point A in the middle;
[0019] Figure 4 This is a three-dimensional view of the first annular plate;
[0020] Figure 5 This is a three-dimensional view of the second annular plate;
[0021] In the diagram: 1. First pipe; 11. First fixing ring; 12. First circular groove; 13. First L-shaped rod; 14. Second pipe; 15. Second fixing ring; 16. Second circular groove; 17. Second L-shaped rod; 2. First annular plate; 21. Second annular plate; 22. First arc groove; 23. Second arc groove; 24. First annular column; 25. Second annular column; 26. Arc groove; 27. Arc protrusion; 3. First cavity; 31. Connecting groove; 32. Air inlet; 33. Airtight elastic layer; 34. Top column; 35. Air nozzle. Detailed Implementation
[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0023] like Figures 1 to 5 As shown, the gas pipeline anti-leakage mechanical seal device of this utility model includes a first pipeline 1 and a second pipeline 14; the connecting ends of the first pipeline 1 and the second pipeline 14 are welded together; a first fixing ring 11 is fixedly connected to the outer wall of the first pipeline 1; a first L-shaped rod 13 is fixedly connected to the side wall of the first fixing ring 11, and the other end of the first L-shaped rod 13 is fixedly connected to the outer wall of the first pipeline 1; a first circular groove 12 is provided on the first fixing ring 11, and a first circular ring plate 2 is slidably connected in the first circular groove 12; the second pipeline... A second fixing ring 15 is fixedly connected to the outer wall of the second pipe 14; a second L-shaped rod 17 is fixedly connected to the side wall of the second fixing ring 15, and the other end of the second L-shaped rod 17 is fixedly connected to the outer wall of the second pipe 14; a second circular groove 16 is provided on the second fixing ring 15, and a second circular ring plate 21 is slidably connected in the second circular groove 16; the first circular ring plate 2 and the second circular ring plate 21 are respectively installed on the side walls of the first fixing ring 11 and the second fixing ring 15 through the first sealing element; the first circular ring plate 2 and the second circular ring plate 21 are sealed together by the second sealing element.
[0024] The first sealing element includes a first arc groove 22 and a second arc groove 23; the first fixing ring 11 has a first arc groove 22 on its side wall, and the first arc groove 22 and the first through groove 12 are interconnected; the second fixing ring 15 has a second arc groove 23 on its side wall, and the second arc groove 23 and the second through groove 16 are interconnected; a first annular post 24 is fixedly connected to the end of the first annular plate 2; a second annular post 25 is fixedly connected to the end of the second annular plate 21; a rubber layer is fixedly connected to the outer side wall of the first annular post 24 and the second annular post 25; the first annular post 24 and the second annular post 25 are respectively installed on the side wall of the first fixing ring 11 and the second fixing ring 15 by bolts;
[0025] The second sealing element includes an arc groove 26; a set of arc grooves 26 are provided on the end side wall of the first annular plate 2; a set of arc protrusions 27 are fixedly connected to the end side wall of the second annular plate 21; a rubber layer is fixedly connected to the outer side wall of the arc protrusions 27.
[0026] In existing technologies, gas pipelines generally require welding during extension installations. However, during gas pipeline leak detection, it has been found that most leaks occur at the welded joints, which are inconvenient to detect. Therefore, this invention addresses this issue by pushing the first annular column 24 and the second annular column 25 at the welded joint of the first pipeline 1 and the second pipeline 14, causing the first annular plate 2 and the second annular plate 21 to fit together. This allows the arc-shaped protrusion 27 to insert into the arc-shaped groove 26, while the first annular column 24 inserts into the first arc groove 22 and the second annular column 25 inserts into the second arc groove 23. The joint is then secured with bolts. Simultaneously, a rubber layer provides a mechanical seal at the weld joint. When a leak occurs at the welded joint of the first pipeline 1 and the second pipeline 14, the first annular plate 2 and the second annular plate 21 provide a secondary seal, effectively protecting against significant gas leaks.
[0027] The first annular plate 2 and the second annular plate 21 each have a first cavity 3; the bottom end of the first cavity 3 has an air inlet 32; the top end of the first cavity 3 has a connecting groove 31; and a measuring element is provided inside the first cavity 3.
[0028] The measuring element includes a top post 34; an airtight elastic layer 33 is fixedly connected to the first cavity 3; the top post 34 is fixedly connected to the top of the airtight elastic layer 33, and the top post 34 extends out through the connecting groove 31.
[0029] During operation, when a leak occurs at the weld, the gas will fill the cavity formed by the first annular plate 2, the second annular plate 21, the first fixed ring 11, and the second fixed ring 15. Then, the gas will enter the first cavity 3 through the air intake, causing the airtight elastic layer 33 to bulge and the top column 34 to be pushed out of the connecting groove 31. This serves as a warning and facilitates the rapid detection of the leak location, enabling quick repair of the leaking weld.
[0030] An air nozzle 35 is provided on the outer wall of the second annular plate 21. During operation, after the first annular plate 2 and the second annular plate 21 are sealed by the first seal and the second seal, air is introduced through the air nozzle 35 (bicycle tire air nozzle, prior art) to inflate the system. The sealing performance is measured to see if the top post 34 can be pushed out. After the measurement, the system is released through the air nozzle 35, allowing the top post 34 to retract into the connecting groove 31.
[0031] Working principle: At the welding position of the first pipe 1 and the second pipe 14, the first annular post 24 and the second annular post 25 are pushed, causing the first annular plate 2 and the second annular plate 21 to fit together, allowing the arc protrusion 27 to insert into the arc groove 26. Simultaneously, the first annular post 24 is inserted into the first arc groove 22, and the second annular post 25 is inserted into the second arc groove 23. Then, it is fixed with bolts. Simultaneously, the rubber layer provides a mechanical seal at the weld joint. If air leakage occurs at the weld joint of the first pipe 1 and the second pipe 14, it can be contained by the first annular plate 2 and the second annular plate 21. The design allows for a secondary sealing operation. When a leak occurs at the weld, it provides a secondary sealing function and protects against a large-scale gas leak. When a leak occurs at the weld, the gas fills the cavity formed by the first annular plate 2, the second annular plate 21, the first fixed ring 11, and the second fixed ring 15. The gas then enters the first cavity 3 through the air intake, causing the impermeable elastic layer 33 to bulge and the top column 34 to be pushed out of the connecting groove 31. This serves as a warning and facilitates quick detection of the leak location, enabling rapid repair of the leaking weld.
[0032] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.
[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.
[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A gas pipeline leak-proof mechanical seal device, characterized in that, The system includes a first pipe and a second pipe; the first pipe and the second pipe are welded together; a first fixing ring is fixed to the outer wall of the first pipe; a first L-shaped rod is fixed to the side wall of the first fixing ring, and the other end of the first L-shaped rod is fixed to the outer wall of the first pipe; a first circular groove is formed on the first fixing ring, and a first circular ring plate is slidably connected within the first circular groove; a second fixing ring is fixed to the outer wall of the second pipe; a second L-shaped rod is fixed to the side wall of the second fixing ring, and the other end of the second L-shaped rod is fixed to the outer wall of the second pipe; a second circular groove is formed on the second fixing ring, and a second circular ring plate is slidably connected within the second circular groove; the first circular ring plate and the second circular ring plate are respectively installed on the side walls of the first fixing ring and the second fixing ring by a first sealing element; the first circular ring plate and the second circular ring plate are sealed together by a second sealing element.
2. The gas pipeline leak-proof mechanical seal device according to claim 1, characterized in that, The first sealing element includes a first arc groove and a second arc groove; the first arc groove is formed on the side wall of the first fixing ring, and the first arc groove and the first through groove are interconnected; the second arc groove is formed on the side wall of the second fixing ring, and the second arc groove and the second through groove are interconnected; a first annular post is fixedly connected to the end of the first annular plate; a second annular post is fixedly connected to the end of the second annular plate; a rubber layer is fixedly connected to the outer side wall of the first annular post and the second annular post; the first annular post and the second annular post are respectively installed on the side wall of the first fixing ring and the second fixing ring by bolts.
3. A gas pipeline leak-proof mechanical seal device according to claim 2, characterized in that, The second sealing element includes an arc groove; a set of arc grooves are formed on the end side wall of the first annular plate; a set of arc protrusions are fixedly connected to the end side wall of the second annular plate; and a rubber layer is fixedly connected to the outer side wall of the arc protrusions.
4. A gas pipeline leak-proof mechanical seal device according to claim 3, characterized in that, Both the first and second annular plates have a first cavity; the bottom of the first cavity has an air inlet; the top of the first cavity has a connecting groove; and a measuring element is provided inside the first cavity.
5. A gas pipeline leak-proof mechanical seal device according to claim 4, characterized in that, The measuring element includes a top post; an airtight elastic layer is fixedly connected to the first cavity; a top post is fixedly connected to the top of the airtight elastic layer, and the top post extends out through a connecting groove.
6. A gas pipeline leak-proof mechanical seal device according to claim 5, characterized in that, An air nozzle is provided on the outer wall of the second annular plate.