An LNG pipeline anti-leakage structure

Abstract

This utility model relates to the field of pipeline technology and provides an LNG pipeline anti-leakage structure, including a pipeline one and a pipeline two. The LNG pipeline anti-leakage structure also includes an installation plate one, installed at one end of the pipeline one. In this utility model, a wedge-shaped metal ring is aligned with a wedge-shaped groove at the two ends of the pipeline, allowing the wedge-shaped metal ring to be embedded in the wedge-shaped groove. An inflation pump delivers gas through an inflation pipe to an airbag on one side of the top surface of the wedge-shaped groove. The airbag expands under the gas pressure, tightly fitting the outer wall of the wedge-shaped metal ring and the inner wall of the wedge-shaped groove, forming a circumferential seal, preventing LNG from leaking through the gap between the wedge-shaped metal ring and the wedge-shaped groove. The airbag expands through inflation to achieve a tight fit with the wedge-shaped metal ring and the wedge-shaped groove, forming a flexible seal. The inflation pump can adjust the airbag pressure, adapting to minor deformations of the pipeline. Under the pressure of LNG, the sealing effect increases with the pressure, effectively preventing leakage.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, and in particular to an anti-leakage structure for LNG pipelines. Background Technology

[0002] LNG pipelines are pipeline systems specifically designed for transporting liquefied natural gas (LNG). They play a crucial role in the natural gas industry chain by transporting LNG from production and storage facilities to regasification facilities or end users.

[0003] With the ongoing adjustment and optimization of the global energy structure, liquefied natural gas (LNG), as a clean and efficient energy source, is playing an increasingly prominent role in the energy sector. LNG's main component is methane, which is colorless, odorless, non-toxic, and non-corrosive. Its volume is approximately 1 / 625th that of the same amount of gaseous natural gas, and its mass is only about 45% of that of the same volume of water, making LNG easy to store and transport over long distances. However, because LNG needs to remain liquid at extremely low temperatures (approximately -162°C), this places extremely stringent requirements on the pipelines, especially regarding their leak-proof performance. During LNG transportation, pipelines experience continuous vibrations due to the operation of the pumps and environmental factors. Over time, the bolts on the connecting flanges can easily loosen. Once the bolts loosen, LNG will leak out from the gaps at the connection. LNG is volatile, and the leaked LNG will quickly evaporate into natural gas. If it accumulates in a confined space and comes into contact with a source of ignition, it is very likely to cause an explosion, seriously threatening the safety of personnel and surrounding facilities. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that during the LNG transportation process, the pipeline will continuously vibrate due to the operation of the transportation pump and environmental factors. Over time, the screws on the connecting flange are very likely to loosen. Once the screws are loose, LNG will leak out from the gaps at the connection.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an LNG pipeline anti-leakage structure, comprising pipeline one and pipeline two, and the LNG pipeline anti-leakage structure further includes: Mounting plate one is installed at one end of the pipe one; Mounting plate two is installed at one end of the pipe two; A wedge-shaped metal ring is fixedly installed at one end of the pipe. A wedge-shaped groove is formed at one end of the second pipe; The wedge-shaped metal ring is adapted to the wedge-shaped groove; The mounting component is disposed between the first mounting plate and the second mounting plate; A seal is disposed inside the wedge-shaped groove.

[0006] In a preferred embodiment, the mounting component includes: A mounting ring is installed at one end of the second mounting plate; Multiple resilient threaded blocks are installed on one side of the mounting ring; A threaded groove is formed on one side of the mounting plate; Among them, multiple elastic threaded blocks are threadedly connected to threaded grooves.

[0007] The technical effect of adopting the above-mentioned further solution is that the elastic threaded block can produce a small deformation during the threaded connection, which can compensate for the assembly error between mounting plate one and mounting plate two. At the same time, the self-locking property of the threaded connection combined with the elastic force can effectively resist the loosening caused by pipeline vibration, improve the stability of the installation structure, and reduce the risk of leakage caused by connection gaps.

[0008] In a preferred embodiment, the seal includes: An airbag is disposed on the surface of one side of the top of the wedge-shaped groove; An air pump is installed at the top of the second pipe; An inflation tube, one end of which is connected to one end of the inflation pump and the other end of which is connected to the top of the airbag, and the inflation tube passes through the mounting plate two and the pipe two.

[0009] The technical advantages of adopting the above-mentioned further solution are as follows: the inflation degree of the airbag can be adjusted by the air pump, so that the airbag tightly fits the gap between the wedge-shaped metal ring and the wedge-shaped groove, forming a dynamic seal. Compared with the traditional static seal, it can adapt to the slight deformation of the pipeline caused by temperature changes, significantly improving the sealing reliability. Moreover, the through design of the inflation pipe ensures the sealing of the inflation path and avoids additional leakage points.

[0010] As a preferred embodiment, the LNG pipeline anti-leakage structure further includes: An inclined surface is formed on the side of the wedge-shaped metal ring closest to the pipe. The airbag is fitted to the inclined surface.

[0011] The technical effect of adopting the above-mentioned further solution is that the inclined surface and the airbag fit together to form a wedge-shaped sealing structure. The "wedge tightening effect" makes the airbag squeeze the sealing surface more tightly under the pressure of LNG. The greater the pressure, the better the sealing effect, effectively preventing LNG from leaking from the gap between the wedge-shaped metal ring and the wedge-shaped groove.

[0012] As a preferred embodiment, the LNG pipeline anti-leakage structure further includes: An inclined angle is provided on the side of the wedge-shaped metal ring closest to pipe two; The tilt angle can pass through the inclined plane through the airbag and enter the wedge-shaped groove.

[0013] The technical effect of adopting the above-mentioned further solution is that the tilt angle design reduces the contact resistance between the wedge metal ring and the airbag when the wedge metal ring is inserted into the wedge groove, avoiding damage to the airbag due to scratches or excessive compression during installation. At the same time, it guides the wedge metal ring to be accurately embedded in the wedge groove, ensuring the initial assembly quality of the seal.

[0014] As a preferred embodiment, the LNG pipeline anti-leakage structure further includes: A support frame is installed on the top of the second pipe; The air pump is located inside the support frame.

[0015] The technical effects of adopting the above-mentioned further solution are: the support frame provides a stable installation foundation for the air pump, avoids the air pump from shifting or being damaged due to pipeline vibration, and at the same time provides physical protection for the air pump, reduces the impact of the external environment on the equipment, and ensures the long-term stable operation of the sealing inflation system.

[0016] As a preferred embodiment, the LNG pipeline anti-leakage structure further includes: Multiple connecting plates are installed on both sides of the mounting plate one and the mounting plate two; Multiple disc-shaped elastic components are respectively installed between the multiple connecting plates and pipe one and pipe two.

[0017] The technical effects of adopting the above-mentioned further solutions are: the disc-shaped elastic component can absorb the axial and radial stress of the pipeline caused by temperature changes or vibration, reduce the impact of stress on the wedge-shaped metal ring and wedge-shaped groove mating structure and seals, avoid seal failure caused by excessive force, and at the same time the connecting plate enhances the overall rigidity of the installation structure.

[0018] As a preferred embodiment, the LNG pipeline anti-leakage structure further includes: A through hole is provided at the top of the support frame; The through hole is adapted to the air inlet at the top of the inflation tube.

[0019] The technical effect of adopting the above-mentioned further solution is that the through hole provides protection and positioning for the air inlet of the inflation tube, preventing the air inlet from being blocked by foreign objects or damaged by accidental collisions, while ensuring smooth gas flow when the inflation pump is working, and ensuring that the airbag can be inflated and deflated normally to maintain sealing performance.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This invention utilizes a wedge-shaped metal ring aligned with wedge-shaped grooves at both ends of a pipeline. The ring is embedded within the grooves, and an inflation pump delivers gas through an inflation pipe to an air bladder on the top surface of the wedge-shaped groove. Under gas pressure, the air bladder expands, tightly fitting the outer wall of the wedge-shaped metal ring and the inner wall of the wedge-shaped groove, forming a circumferential seal to prevent LNG leakage from the gap between the ring and groove. The air bladder's expansion achieves a tight seal with the wedge-shaped metal ring and groove, forming a flexible seal. The inflation pump can adjust the air bladder pressure, adapting to minor pipeline deformations. Under LNG pressure, the sealing effect increases with pressure, effectively preventing leakage. Simultaneously, disc-shaped elastic components absorb axial and radial stresses generated during pipeline operation due to temperature changes or vibrations. Multiple disc-shaped elastic components absorb these stresses, reducing the impact on the wedge-shaped metal ring and groove mating structure and the seal, preventing seal failure. This design adapts to the low-temperature environment and vibration conditions of LNG pipelines, providing dynamic compensation for the disc-shaped elastic components.

[0021] This utility model, by setting up an installation component, aligns multiple elastic threaded blocks with the threaded groove on one side of the installation plate, and rotates the pipe and the installation plate to achieve a threaded connection between the elastic threaded blocks and the threaded groove. The elastic threaded blocks undergo slight deformation during the connection process, which can compensate for the assembly error between the installation plate and the installation plate, ensuring that the two fit tightly together. The connection method between the elastic threaded blocks and the threaded groove can compensate for assembly errors. Attached Figure Description

[0022] Figure 1 This is a perspective view of an embodiment of this application; Figure 2 This is a perspective cross-sectional view of an embodiment of this application; Figure 3 This is a perspective view of the elastic threaded block and mounting plate two according to an embodiment of this application; Figure 4 This is a perspective view of the threaded groove and mounting plate 1 according to an embodiment of this application; Figure 5 This is a perspective cross-sectional view of mounting plate one and mounting plate two in the embodiments of this application.

[0023] Legend: 1. Pipe 1; 2. Mounting plate 1; 3. Mounting plate 2; 4. Pipe 2; 5. Support frame; 6. Connecting plate; 7. Disc-shaped elastic component; 8. Wedge-shaped metal ring; 9. Inclined surface; 10. Airbag; 11. Wedge groove; 12. Through hole; 13. Air pump; 14. Inflation pipe; 15. Inclined angle; 16. Mounting ring; 17. Elastic threaded block; 18. Threaded groove. Detailed Implementation

[0024] 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.

[0025] Example 1: Please see Figures 1-5 This embodiment provides a leak-proof structure for LNG pipelines, the specific concept of which is as follows: An LNG pipeline anti-leakage structure includes a pipeline 1 and a pipeline 2. The LNG pipeline anti-leakage structure also includes a mounting plate 2, a mounting plate 3, a wedge-shaped metal ring 8, a wedge-shaped groove 11, and a sealing element.

[0026] The mounting plate 2 is installed at one end of the pipe 1.

[0027] The mounting plate 23 is installed at one end of the pipe 24.

[0028] The wedge-shaped metal ring 8 is fixedly installed at one end of the pipe 1.

[0029] The wedge-shaped groove 11 is located at one end of the pipe 2 4.

[0030] In addition, the wedge-shaped metal ring 8 is adapted to the wedge-shaped groove 11.

[0031] The sealing element is located inside the wedge-shaped groove 11.

[0032] As examples, in this embodiment, the seal includes an airbag 10, an air pump 13, and an air tube 14.

[0033] The airbag 10 is disposed on the surface of the top side of the wedge-shaped groove 11.

[0034] The air pump 13 is installed at the top of the second pipe 4.

[0035] The inflation tube 14 is connected at one end to one end of the inflation pump 13 and at the other end to the top of the airbag 10, and the inflation tube 14 passes through the mounting plate 2 3 and the pipe 2 4.

[0036] In this embodiment, pipe 1 and pipe 2 are aligned, and the wedge-shaped metal ring 8 fixed at the end of pipe 1 is aligned with the wedge-shaped groove 11 opened at the end of pipe 2. Pipe 1 is pushed so that the wedge-shaped metal ring 8 is embedded in the wedge-shaped groove 11. The air pump 13 set at the top of pipe 2 is started, and gas is delivered to the airbag 10 on one side surface of the top of the wedge-shaped groove 11 through the air pipe 14 that passes through the mounting plate 2 3 and pipe 2 4. The airbag 10 expands under the action of gas pressure and fits tightly against the outer wall of the wedge-shaped metal ring 8 and the inner wall of the wedge-shaped groove 11 to form a circumferential seal, preventing LNG from leaking from the gap between the wedge-shaped metal ring 8 and the wedge-shaped groove 11. The airbag 10 achieves a tight fit with the wedge-shaped metal ring 8 and the wedge-shaped groove 11 by inflation, forming a flexible seal. Compared with a rigid seal, it can better adapt to the small deformation of the pipeline and effectively reduce the risk of leakage. It is especially suitable for the transportation of low-temperature volatile media such as LNG.

[0037] Example 2: Please see Figures 1-5 Based on Example 1, this example provides a leak-proof structure for LNG pipelines, the specific concept of which is as follows: The LNG pipeline anti-leakage structure also includes: an installation component, an inclined surface 9, an inclined angle 15, a support frame 5, multiple connecting plates 6, multiple disc-shaped elastic components 7, and a through hole 12.

[0038] The mounting components are positioned between mounting plate 1 (2) and mounting plate 2 (3).

[0039] The inclined surface 9 is located on the side of the wedge-shaped metal ring 8 near the pipe 1.

[0040] It should be noted that the airbag 10 is in contact with the inclined surface 9.

[0041] The inclined angle 15 is set on the side of the wedge-shaped metal ring 8 near the pipe 2 4.

[0042] In addition, the tilt angle 15 can pass through the inclined surface through the airbag 10 and enter the wedge groove 11.

[0043] The support frame 5 is installed on the top of the second pipe 4, and the air pump 13 is installed inside the support frame 5.

[0044] The multiple connecting plates 6 are installed on both sides of mounting plate 1 2 and mounting plate 2 3.

[0045] Among them, multiple disc-shaped elastic components 7 that provide dynamic sealing compensation are respectively installed between multiple connecting plates 6 and pipe 1 and pipe 2 4.

[0046] The through hole 12 is located on the top of the support frame 5 and is adapted to the top air inlet of the inflation pipe 14.

[0047] As examples, in this embodiment, the mounting components include: a mounting ring 16, a plurality of resilient threaded blocks 17, and a threaded groove 18.

[0048] The mounting ring 16 is installed at one end of the mounting plate 2 3. The multiple elastic threaded blocks 17 are installed on one side of the mounting ring 16. The threaded groove 18 is provided on one side of the mounting plate 2. It should be noted that multiple elastic threaded blocks 17 are threadedly connected to threaded grooves 18.

[0049] In this embodiment, pipe 1 and pipe 4 are aligned so that the wedge-shaped metal ring 8 on pipe 1 is aligned with the wedge-shaped groove 11 on pipe 4. The wedge-shaped metal ring 8 is guided by the inclined surface on the inclined angle 15 to pass through the airbag 10 in the wedge groove 11 and accurately embed into the wedge groove 11. Then, the airbag 10 is inflated. After the airbag 10 expands, it fits against the inclined surface 9. The wedge-shaped sealing structure formed by the fit between the inclined surface 9 and the airbag 10, combined with the air pump 13, can adjust the pressure of the airbag 10, which can adapt to the slight deformation of the pipe. Under the action of LNG pressure, the sealing effect increases with the increase of pressure, effectively preventing leakage. In addition, multiple elastic threaded blocks 17 are aligned with the threaded groove 18 on one side of the mounting plate 2. Rotating pipe 1 and mounting plate 2 realizes the elasticity. The threaded connection between the elastic threaded block 17 and the threaded groove 18 allows for slight deformation of the elastic threaded block 17 during connection, which can compensate for assembly errors between mounting plate 12 and mounting plate 23, ensuring a tight fit between the two. The connection method between the elastic threaded block 17 and the threaded groove 18 can compensate for assembly errors. At the same time, if axial and radial stresses are generated due to temperature changes or vibrations during pipeline operation, multiple disc-shaped elastic components 7 will absorb these stresses respectively, reducing the impact on the mating structure of the wedge-shaped metal ring 8 and the wedge-shaped groove 11 and the sealing components, avoiding seal failure, and adapting to the low temperature environment and vibration conditions of LNG pipelines. The dynamic compensation function of the disc-shaped elastic components 7, the adaptation design of the inflation pipe 14 and the through hole 12, etc., ensure long-term stable operation under complex working conditions.

[0050] Working principle: In use, first, align pipe 1 and pipe 2, so that the wedge-shaped metal ring 8 on pipe 1 is aligned with the wedge-shaped groove 11 on pipe 2. With the help of the tilt angle 15 of the wedge-shaped metal ring 8 on the side close to pipe 2, the wedge-shaped metal ring 8 is guided by the inclined surface to pass smoothly through the airbag 10 in the wedge groove 11 and accurately embed into the wedge groove 11 to complete the initial positioning.

[0051] Next, the installation components are connected and fixed. The mounting ring 16 and multiple elastic threaded blocks 17 at one end of the mounting plate 2 3 enter the threaded groove 18 of the mounting plate 2. Then, the pipe 1 and the mounting plate 2 are rotated to make the elastic threaded blocks 17 threadedly connected to the threaded groove 18. The elastic threaded blocks 17 undergo slight deformation during the connection process to compensate for assembly errors and ensure that the mounting plate 2 and the mounting plate 3 fit tightly. At the same time, the connecting plates 6 on both sides further reinforce the connection and improve the overall structural stability. Then, the sealing operation is started. The air pump 13 located in the top support frame 5 of the second pipeline 4 starts to work. It inflates the airbag 10 on the top side surface of the wedge groove 11 through the air inflating pipe 14 that passes through the mounting plate 2 3 and the second pipeline 4. The airbag 10 gradually expands and fits against the inclined surface 9 of the wedge metal ring 8 near the side of the first pipeline 1. The wedge effect of the inclined surface 9 is used to achieve a tight seal under the pressure of LNG, preventing LNG leakage.

[0052] During pipeline operation, the disc-shaped elastic component 7 plays a role. When the pipeline generates axial and radial stress due to temperature changes or vibration, multiple disc-shaped elastic components 7 absorb these stresses respectively, reducing the impact on the wedge-shaped metal ring 8 and wedge-shaped groove 11 mating structure and seals, and avoiding seal failure due to excessive force.

[0053] Meanwhile, the support frame 5 provides stable protection for the air pump 13, preventing it from shifting or being damaged due to pipeline vibration. The through hole 12 at the top of the support frame 5 is compatible with the air inlet at the top of the air inlet of the air inlet pipe 14, ensuring smooth gas flow when the air pump 13 is working, and ensuring that the air bag 10 can be properly inflated and deflated to maintain sealing performance, thereby achieving long-term effective leak prevention of the LNG pipeline.

[0054] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0055] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A LNG piping leak-proof structure comprising a piping one (1) and a piping two (4), characterized by, The LNG pipeline's leak-proof structure also includes: Mounting plate 1 (2) is installed at one end of the pipe 1 (1); Mounting plate two (3) is installed at one end of the pipe two (4); A wedge-shaped metal ring (8) is fixedly installed at one end of the pipe (1); A wedge-shaped groove (11) is provided at one end of the second pipe (4); The wedge-shaped metal ring (8) is adapted to the wedge-shaped groove (11); The mounting component is disposed between the first mounting plate (2) and the second mounting plate (3); A seal is disposed inside the wedge-shaped groove (11).

2. The LNG pipeline anti-leakage structure according to claim 1, characterized in that, The mounting component includes: Mounting ring (16) is installed at one end of mounting plate two (3); Multiple resilient threaded blocks (17) are installed on one side of the mounting ring (16); A threaded groove (18) is formed on one side of the mounting plate (2); Among them, multiple elastic threaded blocks (17) are threadedly connected to threaded grooves (18).

3. The LNG piping leak barrier structure according to claim 1, wherein The sealing element includes: An airbag (10) is disposed on the surface of one side of the top of the wedge-shaped groove (11); An air pump (13) is installed at the top of the second pipe (4); An inflation tube (14) is provided at one end of the inflation pump (13) and at the other end of the airbag (10), and the inflation tube (14) passes through the mounting plate (3) and the pipe (4).

4. The LNG pipeline anti-leakage structure according to claim 3, characterized in that, The LNG pipeline's leak-proof structure also includes: An inclined surface (9) is formed on the side of the wedge-shaped metal ring (8) near the pipe (1); The airbag (10) is in contact with the inclined surface (9).

5. The LNG piping leak barrier structure according to claim 1, wherein The LNG pipeline's leak-proof structure also includes: An inclination angle (15) is provided on the side of the wedge-shaped metal ring (8) near the second pipe (4); The tilt angle (15) can pass through the airbag (10) through the inclined surface and enter the wedge groove (11).

6. The LNG piping leak barrier structure according to claim 3, wherein The LNG pipeline's leak-proof structure also includes: A support frame (5) is installed on top of the second pipe (4); The air pump (13) is located inside the support frame (5).

7. The LNG piping leak barrier structure according to claim 1, wherein The LNG pipeline's leak-proof structure also includes: Multiple connecting plates (6) are installed on both sides of the mounting plate one (2) and the mounting plate two (3); Multiple disc-shaped elastic components (7) are respectively installed between multiple connecting plates (6) and pipe one (1) and pipe two (4).

8. The LNG piping leak containment structure of claim 6, wherein, The LNG pipeline's leak-proof structure also includes: A through hole (12) is provided at the top of the support frame (5); The through hole (12) is adapted to the top air inlet of the air inlet pipe (14).

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