An online leak plugging device and method for a coal gas facility

Abstract

This invention provides an online leak-sealing device and method for gas facilities, relating to the field of leak treatment technology. It includes a top rod, a fastening structure, and a sealing structure. The top rod has a cavity with a limiting structure inside. The limiting structure includes a pin, an elastic element, and two stops. The pin is located within the cavity, and the stops are rotatably mounted on the pin. The elastic element is positioned between the two stops. The sealing structure is used to seal the gas facility leak. The fastening structure is mounted on the top rod and used to fix the sealing structure to the outer wall of the gas facility. This invention employs a dual-seal-sealing method. After the online leak-sealing device performs a first seal to prevent gas leakage, a second seal is performed by applying sealant or welding a casing, effectively improving the leak treatment effect. Since the first seal is a non-hot work operation, there is no gas leakage during the second seal, thus eliminating safety hazards during the seal-sealing operation.

Description

Technical Field

[0001] This application relates to the field of leak repair technology, and more specifically, to an online leak sealing device and method for gas facilities. Background Technology

[0002] During the production, transportation, and storage of coal gas, gas facilities such as pipelines, corrugated expansion joints, and gas holders are prone to leaks due to factors such as welding quality and corrosion from coal gas condensate. Leaking coal gas seriously endangers the safety of people in the surrounding area, and can easily cause fires and explosions if it comes into contact with an open flame. Currently, the main methods for dealing with leaks include sealing with sealant, patching with steel plates and welding, encasing and welding, and equipment replacement.

[0003] Of the aforementioned methods, sealant is suitable for smaller leaks. However, for larger leaks, the treatment is often ineffective or even fails to seal them properly. Steel plate welding and casing welding are both pressurized hot work operations, posing significant safety risks when gas leaks out. Equipment replacement is constrained by continuous production, making it difficult to implement, especially when the company's internal gas pipelines are in a ring network or involve gas facilities that cannot be shut down. In such cases, leak repair is particularly challenging and difficult to eradicate completely. In summary, existing leak repair methods generally suffer from significant safety risks and unsatisfactory treatment results. Summary of the Invention

[0004] The purpose of this application is to provide an online leak sealing device and method for gas facilities, which can solve the technical problems of prominent safety risks and unsatisfactory treatment results when dealing with leaks.

[0005] This application provides an online leak sealing device for gas facilities, including a top rod, a fastening structure, and a sealing structure. The top rod has a cavity, and a limiting structure is provided inside the cavity. The limiting structure includes a pin, an elastic element, and two stops. The pin is disposed inside the cavity, the stops are rotatably mounted on the pin, and the elastic element is disposed between the two stops.

[0006] The sealing structure is used to seal leaks in the gas facility, and the fastening structure is installed on the top rod and used to fix the sealing structure to the outer wall of the gas facility.

[0007] Preferably, the top rod is provided with a groove, and the extending direction of the groove is parallel to the extending direction of the cavity.

[0008] Preferably, one end of the top rod has a tapered structure.

[0009] Preferably, one end of the stop is provided with anti-slip texture or adopts a serrated structure.

[0010] Preferably, the elastic element is a torsion spring, and the elastic element is disposed on the pin.

[0011] Preferably, the stop block is provided with a through hole, and the two ends of the elastic element are respectively disposed in the through hole.

[0012] Preferably, the sealing structure includes a sealing gasket and a pressure plate, the sealing gasket being attached to the outer wall of the gas facility, and the pressure plate being disposed between the sealing gasket and the fastening structure.

[0013] Preferably, the fastening structure includes a wing nut, the push rod has external threads, and the wing nut is threaded onto the push rod.

[0014] Preferably, the fastening structure further includes a gasket, which is sleeved on the top rod and located between the sealing structure and the wing nut.

[0015] A method for online leak sealing of gas facilities includes:

[0016] S1: Clean the external surroundings of the gas facility leak point to fully expose the leak point. Select different types of sealing structures according to the shape and number of leak points. For multiple adjacent leak points in a local area, select different types of sealing structures according to the shape and number of leak points. Multiple leak points share a set of sealing structures, and each leak point corresponds to a top rod and a set of fastening structures.

[0017] S2: Align the head of the push rod with the leak point, and use manual pressing or hammering to make the push rod pass through the leak point. During the process of the push rod passing through the leak point, the two blocks are squeezed by the gas facility and move towards each other and squeeze the elastic element until the blocks are completely inside the cavity. After the cavity is completely inside the gas facility, the two blocks move away from each other and leave the cavity under the action of the elastic element's rebound force.

[0018] S3: First, install the sealing structure on the top rod, and then use the fastening structure to fix the sealing structure to the outer wall of the gas facility. The sealing structure will plug the leak. During this process, the stop block will press against the inner wall of the gas facility to form a limit, ensuring the stability of the overall installation of the device and the leak plugging effect.

[0019] S4: After sealing the leak, and under conditions of no gas leakage, the leak should be welded again by applying sealant or by encasing and welding.

[0020] The beneficial effects of this invention are:

[0021] This invention employs a dual-stopping method. After the leak is plugged once using an online plugging device, gas leakage can be prevented. Then, the leak is plugged a second time by applying sealant or welding a casing, which can effectively improve the treatment effect of the leak. Since the first plugging is a non-hot work operation, there is no gas leakage during the second plugging, thus eliminating the safety hazards during the plugging operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a side view of the present invention;

[0025] Figure 3 This is a schematic diagram illustrating the usage state of the present invention;

[0026] Figure 4 This is a schematic diagram showing the state of the limiting structure during the installation process of this invention;

[0027] Figure 5 This is a schematic diagram of the installation structure of the present invention when used for two leak points;

[0028] Figure 6 This is a disassembled diagram of the limiting structure in this invention;

[0029] Figure 7 This is a diagram showing the relationship between the length of the baffle and the wall thickness of the gas facility in this invention.

[0030] The reference numerals in the attached figures are as follows:

[0031] 1. Top rod; 2. Fastening structure; 3. Sealing structure; 4. Cavity; 5. Limiting structure; 6. Pin; 7. Elastic element; 8. Stop block; 9. Gas facility; 10. Groove; 11. Through hole; 12. Sealing gasket; 13. Pressure plate; 14. Wing nut; 15. Washer; 16. Leak point. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] Example 1

[0039] like Figure 1-6 As shown in the figure, this application provides an online leak sealing device for a gas facility, including a top rod 1, a fastening structure 2, and a sealing structure 3. A cavity 4 is provided on the top rod 1, and a limiting structure 5 is provided within the cavity 4. The limiting structure 5 includes a pin 6, an elastic element 7, and two stops 8. The pin 6 is disposed within the cavity 4, and the stops 8 are rotatably mounted on the pin 6. The elastic element 7 is disposed between the two stops 8. The sealing structure 3 is used to seal leaks in the gas facility 9. The fastening structure 2 is mounted on the top rod 1 and used to fix the sealing structure 3. On the outer wall of the gas facility 9, since the sealing structure 3 is fixed, the cavity 4 needs to always be in the gas area. The elastic element 7 and the two stops 8 should be inside the gas facility 9. Therefore, the spatial height of the cavity 4 must first be determined. The spatial height from the axis of the pin 6 to the top of the cavity 4 is related to the limiting function of the stops 8 and is always inside the gas facility 9. Therefore, the spatial height from the axis of the pin 6 to the top of the cavity 4 only affects the length of the push rod 1. To be precise, it is necessary to determine the spatial height from the axis of the pin 6 to the bottom of the cavity 4. Figure 7 As shown, point A is the center of pin 6. AB represents the state where the block 8 is contracted into the cavity 4, and AE represents the state where the block 8 is extended. Therefore, the lengths of AB and AE are equal. The included angle formed by the block 8 rotating along the axis of pin 6 is β. BC represents the wall thickness of the gas facility 9 when the block 8 is extended. To ensure that the cavity 4 is always inside the gas facility 9 after the sealing structure 3 is fixed, the length of BC should be less than or equal to the wall thickness of the gas facility 9. The calculation relationship between AC and AE is: cosβ=AC / AE.

[0040] In use, first align the push rod 1 with the leak point 16, and use manual pressing or hammering to make the push rod 1 pass through the leak point 16. During the process of the push rod 1 passing through the leak point 16, the two stop blocks 8 are squeezed by the gas facility 9 and move towards each other, squeezing the elastic element 7, until the stop blocks 8 are completely inserted into the cavity 4. After the cavity 4 is completely inserted into the interior of the gas facility 9, under the action of the elastic force of the elastic element 7, the two stop blocks 8 move away from each other and leave the cavity 4. Then, install the sealing structure 3 on the push rod 1, and finally use the fastening structure 2 to secure it. The sealing structure 3 is fixed on the outer wall of the gas facility 9. During this process, the stop block 8 will abut against the inner wall of the gas facility 9 to form a limit, ensuring the stability of the overall installation of the device and the leak-stopping effect. Due to factors such as welding quality and corrosion of gas condensate, the gas facility 9 may have leaks 16. For multiple leaks 16 that are close to each other in a local area, different types of sealing structures 3 are selected according to the shape and number of leaks 16. Multiple leaks 16 share a set of sealing structures 3, and each leak corresponds to a top rod 1 and a set of fastening structures 2.

[0041] In this embodiment, a groove 10 is provided on the top rod 1. The extension direction of the groove 10 is parallel to the extension direction of the cavity 4. The groove 10 makes it easy for the operator to identify the extension direction of the block 8. By adjusting the direction of the groove 10, the direction of the groove 10 is aligned with the narrower direction of the leak point 16 of the gas facility 9, ensuring that the block 8 and the inner wall of the gas facility 9 have sufficient contact area, which is beneficial to improving the overall stability of the device installation.

[0042] In this embodiment, one end of the top rod 1 is a conical structure. The conical structure facilitates the entry of the top rod 1 into the interior of the gas facility 9 under the action of external force.

[0043] In this embodiment, one end of the stop block 8 is provided with anti-slip texture or adopts a serrated structure. The anti-slip texture or serrated structure can increase the frictional resistance between the stop block 8 and the inner wall of the gas facility 9, and improve the overall stability of the device installation.

[0044] In this embodiment, the elastic element 7 is set as a torsion spring. The torsion spring has the advantages of compact structure, small space occupation, uniform force distribution and easy installation. The elastic element 7 is set on the pin 6.

[0045] In this embodiment, the stop block 8 is provided with a through hole 11, and the two ends of the elastic element 7 are respectively placed in the through hole 11. When in use, the two ends of the torsion spring used as the elastic element 7 are bent and placed into the through holes 11 on the two stop blocks 8 respectively, which improves the ease of installation and stability of use of the elastic element 7.

[0046] In this embodiment, the sealing structure 3 includes a sealing gasket 12 and a pressure plate 13. The sealing gasket 12 is attached to the outer wall of the gas facility 9, and the pressure plate 13 is disposed between the sealing gasket 12 and the fastening structure 2. In specific implementation, the sealing gasket 12 is made of rubber. The rubber material is soft and has strong adhesion, which can fill the small bumps, scratches and gaps on the joint surface to achieve reliable sealing. It can effectively prevent gas leakage, water leakage and oil leakage. Moreover, the rubber has relatively low requirements for the processing accuracy of the joint surface, and can compensate for slight deformation, assembly error and gap changes caused by thermal expansion and contraction. After the pressure plate 13 presses down on the rubber used as the sealing gasket 12, it can effectively plug the leak point 16. The pressure plate 13 can be selected in different forms such as strip and L-shape according to the shape and number of leak points 16.

[0047] In this embodiment, the fastening structure 2 includes a wing nut 14, the push rod 1 has external threads, and the wing nut 14 is threaded onto the push rod 1. The wing nut 14 has the advantages of convenient operation, saving time and effort, and is convenient for on-site operation.

[0048] In this embodiment, the fastening structure 2 also includes a gasket 15, which is sleeved on the push rod 1. The gasket 15 is located between the sealing structure 3 and the wing nut 14. The gasket 15 is used to reduce the risk of the wing nut 14 coming loose and to ensure the long-term stability of the connection between the wing nut 14 and the push rod 1.

[0049] Example 2

[0050] A method for online leak sealing of gas facilities includes the following steps:

[0051] S1: Clean the external surroundings of gas facility 9 leak point 16 to fully expose the leak point. Select different types of sealing structures 3 according to the shape and number of leak points 16. For multiple adjacent leak points 16 in a local area, select different types of sealing structures 3 according to the shape and number of leak points 16. Multiple leak points 16 share a set of sealing structures 3. Each leak point 16 corresponds to a top rod 1 and a set of fastening structures 2.

[0052] S2: Align the head of the push rod 1 with the leak point 16, and use manual pressing or hammering to make the push rod 1 pass through the leak point 16. During the process of the push rod 1 passing through the leak point 16, the two blocks 8 are squeezed by the gas facility 9 and move towards each other and squeeze the elastic element 7 until the blocks 8 are completely inside the cavity 4. After the cavity 4 is completely inside the gas facility 9, under the action of the elastic force of the elastic element 7, the two blocks 8 move away from each other and leave the cavity 4.

[0053] S3: First, install the sealing structure 3 on the top rod 1, and then use the fastening structure 2 to fix the sealing structure 3 on the outer wall of the gas facility 9. The sealing structure 3 will plug the leak point 16. During this process, the stop block 8 will press against the inner wall of the gas facility 9 to form a limit, ensuring the stability of the overall installation of the device and the plugging effect.

[0054] S4: After sealing the leak point 16, under the condition of no gas leakage, the leak point 16 is welded again by applying sealant or by encasing and welding.

[0055] The online leak sealing method for gas facilities provided by this invention adopts a dual-seal sealing approach. After sealing the leak point 16 with an online sealant device, gas leakage can be prevented. Then, the leak point 16 is sealed a second time by applying sealant or welding a casing, which can effectively improve the treatment effect of the leak point 16. Since the first sealant sealing is a non-hot work operation, there is no gas leakage during the second sealant sealing, thus eliminating the safety hazards during the sealant sealing operation.

[0056] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An online leak sealing device for gas facilities, characterized in that: The device includes a push rod, a fastening structure, and a sealing structure. The push rod has a cavity, and a limiting structure is provided inside the cavity. The limiting structure includes a pin, an elastic element, and two stops. The pin is disposed inside the cavity, the stops are rotatably mounted on the pin, and the elastic element is disposed between the two stops. The sealing structure is used to seal leaks in the gas facility, and the fastening structure is installed on the top rod and used to fix the sealing structure to the outer wall of the gas facility.

2. The online leak sealing device for gas facilities according to claim 1, characterized in that: The top rod is provided with a groove, and the extending direction of the groove is parallel to the extending direction of the cavity.

3. The online leak sealing device for gas facilities according to claim 1, characterized in that: One end of the top rod has a tapered structure.

4. The online leak sealing device for gas facilities according to claim 1, characterized in that: One end of the stop block is provided with anti-slip texture or adopts a serrated structure.

5. The online leak sealing device for gas facilities according to claim 1, characterized in that: The elastic element is configured as a torsion spring, and the elastic element is disposed on the pin.

6. The online leak sealing device for gas facilities according to claim 5, characterized in that: The stop block is provided with a through hole, and the two ends of the elastic element are respectively disposed in the through hole.

7. The online leak sealing device for gas facilities according to claim 1, characterized in that: The sealing structure includes a sealing gasket and a pressure plate. The sealing gasket is attached to the outer wall of the gas facility, and the pressure plate is disposed between the sealing gasket and the fastening structure.

8. The online leak sealing device for gas facilities according to claim 1, characterized in that: The fastening structure includes a wing nut, the push rod has external threads, and the wing nut is threaded onto the push rod.

9. The online leak sealing device for gas facilities according to claim 8, characterized in that: The fastening structure also includes a gasket, which is sleeved on the top rod and located between the sealing structure and the wing nut.

10. A method for online leak sealing of gas facilities, employing the online leak sealing device for gas facilities as described in any one of claims 1-9, characterized in that: Includes the following steps: S1: Clean the external surroundings of the gas facility leak point to fully expose the leak point. Select different types of sealing structures according to the shape and number of leak points. For multiple adjacent leak points in a local area, select different types of sealing structures according to the shape and number of leak points. Multiple leak points share a set of sealing structures, and each leak point corresponds to a top rod and a set of fastening structures. S2: Align the head of the push rod with the leak point, and use manual pressing or hammering to make the push rod pass through the leak point. During the process of the push rod passing through the leak point, the two blocks are squeezed by the gas facility and move towards each other and squeeze the elastic element until the blocks are completely inside the cavity. After the cavity is completely inside the gas facility, the two blocks move away from each other and leave the cavity under the action of the elastic element's rebound force. S3: First, install the sealing structure on the top rod, and then use the fastening structure to fix the sealing structure to the outer wall of the gas facility. The sealing structure will plug the leak. During this process, the stop block will press against the inner wall of the gas facility to form a limit, ensuring the stability of the overall installation of the device and the leak plugging effect. S4: After sealing the leak, and under conditions of no gas leakage, the leak should be welded again by applying sealant or by encasing and welding.

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