Compatible metal sealing ring and dismounting structure thereof

Abstract

The utility model relates to the technical field of metal sealing rings, in particular to a compatible type metal sealing ring and a dismounting structure thereof, which comprises a sealing ring main body, and the sealing ring main body is sleeved in the inner wall of a conveying pipeline through which the axis of a flange penetrates; the outer walls of the two axial ends of the sealing ring body are profiling outer walls, and the wall face shapes of the profiling outer walls are matched with the shape of the inner wall of the conveying pipeline. Arc-shaped ring walls are arranged at the two axial ends of the sealing ring body and are of a horn-shaped structure, the diverging ends of the horn-shaped structures face the outer edge of the sealing ring body, the arc-shaped ring walls abut against the inner wall of the conveying pipeline in the axial direction of the conveying pipeline, and when two flanges are in butt joint, the arc-shaped ring walls are extruded oppositely and deform, so that the conveying pipeline is sealed. Metal sealing is conducted between the two flanges, and the sealing effect is improved. According to the utility model, the technical problems of compatibility with a standard sealing ring and formation of multi-metal sealing at the flange joint are solved.

Description

Technical Field

[0001] This utility model relates to the field of metal sealing ring technology, and more specifically, to a compatible metal sealing ring and its disassembly structure. Background Technology

[0002] In the oil and gas industry, flange structures are installed at key and critical connection points of wellhead equipment such as gate valves, wellheads, and tubing heads. Metal sealing rings are typically used on the flange connection surfaces to ensure sealing performance and prevent media leakage. The metal sealing ring, subjected to the pre-tightening force of the bolts during flange assembly, forms a metal seal that fits tightly against the flange sealing surface, creating an effective seal and preventing fluid leakage.

[0003] However, due to the high risk of oil and gas equipment, it is even more important to maintain the sealing of the pipeline during transportation. Existing flange connections are generally sealed with only one layer of metal sealing rings, which are prone to damage and leakage under long-term operation, affecting the safety of outside personnel.

[0004] A Chinese utility model patent, titled "A Metal Sealing Ring for Flange Connections" and with publication number CN221443281U, includes a metal sealing ring body. The outer ring of the metal sealing ring body has protrusions, while a metal inner tube is located at its center. A rubber gasket is fitted around the outer side of the metal inner tube. This utility model uses the rubber gasket to achieve a flexible seal between the metal sealing ring body and the pipe end face, ensuring the sealing performance of the flange-pipe connection.

[0005] Although this invention can achieve flexible sealing through rubber gaskets, rubber seals are more susceptible to damage than metal seals in high-temperature, high-pressure, and highly corrosive conveying environments. Their sealing performance is also unstable and their safety is lower. Utility Model Content

[0006] The purpose of this application is to provide a compatible metal sealing ring and its disassembly structure, which solves the technical problem of being compatible with standard sealing rings and forming a multi-metal seal at flange connections.

[0007] To solve the above-mentioned technical problems, the solution adopted in this application is as follows:

[0008] A compatible metal sealing ring, comprising a sealing ring body.

[0009] Preferably, the sealing ring body is fitted inside the conveying pipe through which the flange shaft passes.

[0010] Preferably, the outer walls at both axial ends of the sealing ring body are configured as contoured outer walls, and the shape of the contoured outer walls matches the shape of the inner wall of the conveying pipe.

[0011] Preferably, the sealing ring body has arc-shaped ring walls at both axial ends. The arc-shaped ring walls have a horn-shaped structure, with the radiating end of the horn-shaped structure facing the outer edge of the sealing ring body. The arc-shaped ring walls abut against the inner wall of the conveying pipe along the axial direction of the conveying pipe.

[0012] Preferably, the arc-shaped ring wall is a metal structure.

[0013] Preferably, the arc-shaped ring wall has a bending deformation structure.

[0014] Preferably, the outer surface of the sealing ring body is provided with an arc-shaped ring wall, a contoured outer wall, an annular pad, a contoured outer wall, and an arc-shaped ring wall in sequence along its axial direction.

[0015] Preferably, an annular pad is fitted on the outer wall of the middle part of the sealing ring body in the axial direction, and a threaded groove is provided on the outer ring wall of the annular pad.

[0016] Preferably, the annular gasket is located inside the pipe opening at the joint of the two flanges.

[0017] A disassembly structure for a compatible metal seal ring, comprising a disassembly assembly that is threadedly connected to an annular gasket.

[0018] Preferably, the disassembly assembly includes an annular retaining ring, the inner ring wall of which is provided with a spiral protrusion, and screws are symmetrically arranged on the axial side of the annular retaining ring, the screw threads passing through the annular retaining ring and extending along the axial direction of the annular retaining ring.

[0019] Preferably, when sealing is performed, the disassembly assembly is separated from the annular gasket.

[0020] Preferably, when disassembling the compatible metal seal ring, the threaded protrusion of the inner ring of the annular retainer matches and connects with the threaded groove of the outer ring wall of the annular gasket, the bottom of the screw on the annular retainer abuts against the mating surface of the flange, and by turning the screw, the annular gasket separates from the flange port.

[0021] Preferably, the outer edge of the flange port is provided with an annular groove, the diameter of which is the same as the outer ring diameter of the annular gasket.

[0022] Preferably, when sealing, the axial ends of the annular gasket abut against the annular grooves on the two flanges respectively.

[0023] The technical solution of this application has at least the following advantages and beneficial effects:

[0024] In this invention, a compatible sealing metal ring is directly fitted inside the pipe opening of the flange connection, and the two ends of the compatible sealing metal ring abut against the stepped inner walls of the pipe openings of the two flanges. This allows the compatible sealing metal ring to be directly snapped and fixed inside the pipe openings of the two flanges. The arc-shaped ring wall, which bends and deforms under pressure at both ends of the compatible sealing metal ring, seals the inner wall of the flange pipe opening, thus achieving a metal seal directly inside the pipe opening of the flange. Furthermore, between the flanges, it can directly accommodate existing standard gaskets on the flange mating surface for multiple seals, improving the stability of the sealing performance and enhancing the safety of the seal.

[0025] In this invention, a disassembly structure that can match the outer thread of the compatible sealing metal ring is used to quickly disassemble the compatible sealing metal ring after the two mating flanges are separated. The compatible sealing metal ring, which is stuck in the flange opening due to structural deformation and debris blockage, is fixed together by the thread. Then, screws are used to abut against the flange mating surface, and the compressive force applied to the surface by the screws through the thread rotation is used to quickly disassemble the compatible sealing metal ring. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0027] Figure 2 This is a cross-sectional view of the compatible metal sealing ring in this utility model.

[0028] Figure 3 This is a cross-sectional view of the disassembly component in this utility model.

[0029] Figure 4 This is a cross-sectional view of the compatible metal sealing ring when the two flanges are separated in this utility model.

[0030] Figure 5 This is a cross-sectional view of the compatible metal sealing ring when two flanges are connected in this utility model.

[0031] Figure 6 This is a cross-sectional view of the compatible metal sealing ring on the flange when using the disassembly assembly in this utility model.

[0032] In the diagram: 1-Sealing ring body, 2-Arc-shaped ring wall, 3-Annular gasket, 4-Conformal outer wall, 5-Disassembly assembly, 501-Annular retaining ring, 502-Threaded protrusion, 503-Screw, 6-Flange, 7-Standard gasket. Detailed Implementation

[0033] 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.

[0034] It should be noted that similar reference numerals 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. The terms "center," "upper," "lower," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the figures, or the orientation or positional relationships commonly used when the product is in use, 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, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation on this application. It should also be noted that unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In existing technologies, flange connections are typically installed at key and critical pipeline connection points in wellhead equipment such as gate valves, wellheads, and tubing heads to facilitate pipeline maintenance and dredging. The mating surfaces of these flanges need to be designed and manufactured according to API standards to increase the fit of the flange connection surfaces, reduce gaps, and create sealing grooves on the flange mating surfaces to install standard gaskets. When two flanges are installed face to face, the pre-tightening force of the bolts on the flanges compresses the standard gaskets to form a metal seal, ensuring that the two flanges are leak-proof and connected.

[0036] Example 1

[0037] Please refer to Figure 4 and Figure 5 In this embodiment, the conveying pipeline passes through the shafts of two connected flanges, and a sealing ring groove is opened on the flange mating surface to install a standard gasket and seal the two mating flanges.

[0038] Please refer to Figures 1-5 This utility model provides a compatible metal sealing ring, which is a metal structure used for metal sealing. It includes a sealing ring body 1, an arc-shaped ring wall 2, and a contoured outer wall 4.

[0039] The sealing ring body 1 is fitted into the pipe opening of the flange 6. The outer wall of the sealing ring is designed as a contoured outer wall 4. The shape of the contoured outer wall 4 matches the shape of the inner wall of the conveying pipe in the flange 6. When the two flanges 6 are joined together, the sealing ring body 1 can be snapped and fixed into the inner wall of the conveying pipe in the two flanges 6, thereby restricting the movement of the sealing ring body 1 fitted into the pipe opening along the length of the conveying pipe, which facilitates the sealing work using the sealing ring body 1.

[0040] Furthermore, an arc-shaped ring wall 2 is provided at both axial ends of the sealing ring body 1. The arc-shaped ring wall 2 has a trumpet-shaped structure, and the opening (i.e., the diverging end) of the trumpet-shaped structure faces the outer edge of the sealing ring. During the docking process of the two flanges 6, the arc-shaped ring wall 2 moves closer to and abuts against the inner wall of the conveying pipeline along with the contoured outer wall 4. When the surfaces of the two flanges 6 are docked, the bolts on the flanges 6 are turned to squeeze the docking surfaces of the two flanges 6 to make them fit together. During this process, the existing standard gasket 7 on the flanges 6 provides a metal seal to the surface of the flanges 6, while the sealing ring body 1 at the conveying pipeline of the flanges 6 applies pressure to the sealing ring body 1 between the two flanges 6 through the mutual extrusion force of the two flanges 6. The trumpet-shaped metal structure of the arc-shaped ring wall 2 has a weak bending deformation force, so the opening of the trumpet-shaped structure will deform and abut against the inner wall of the conveying pipeline, forming another layer of metal seal between the inner wall of the conveying pipeline and the flanges 6. Thus, a double seal is achieved by using the standard gasket 7 and the compatible metal sealing ring, improving the sealing effect between the docking surfaces of the two flanges 6.

[0041] It is worth noting that, in order to ensure the fit of the flange 6 mating surfaces and improve the sealing performance when flange 6 is mated, no secondary processing is performed on the flange 6 surface designed and manufactured according to API standards (flange 6 is a standardized existing product). Therefore, the compatible metal sealing ring is directly fitted inside the existing conveying pipeline of flange 6, and the metal seal between the two flange 6 is achieved by using the inner wall of the conveying pipeline and the bolt preload force when flange 6 is mated, so that it can be quickly compatible with most flange 6 models.

[0042] Example 2

[0043] This utility model also provides a disassembly structure for a compatible metal seal ring, which allows for the disassembly of the compatible metal seal ring.

[0044] When the compatible metal seal ring is finished sealing and needs to be disassembled and replaced, the two flanges 6 in the joint are separated, and the standard gaskets 7 on the mating surfaces of the two flanges 6 are removed. At this time, the compatible metal seal ring located in the conveying pipe of flange 6 is deformed due to the long-term compression pressure of flange 6, and the impurities transported in the conveying pipe have accumulated at the sealing position between the compatible metal seal ring and the inner wall of the conveying pipe for a long time. This causes the compatible metal seal ring to easily get stuck in the conveying pipe and difficult to remove manually. Therefore, a disassembly structure for the compatible metal seal ring is needed to remove the stuck compatible metal seal ring from the conveying pipe of flange 6.

[0045] Please refer to Figure 3 and Figure 6 In this embodiment, the disassembly component 5 includes an annular retaining ring 501, a threaded protrusion 502, and a screw 503.

[0046] The compatible metal seal also includes an annular gasket 3 that is fixed in place with the disassembly assembly 5.

[0047] First, an annular gasket 3 is fixedly fitted on the outer wall of the middle part of the sealing ring body 1 in the axial direction. The outer ring wall of the annular gasket 3 is provided with a threaded groove. During the sealing process of the sealing ring body 1 to the flange 6 mating surface, the annular gasket 3 is located in the inner wall of the conveying pipeline to avoid the annular gasket 3 being on the mating surface of the flange 6, which would affect the metal sealing effect of the standard gasket 7. When the annular gasket 3 is set in the middle position, it will be at the mating position of the two flanges 6 after the two flanges 6 are mated. Thus, after the two flanges 6 are separated, half of the annular gasket 3 is outside the mating surface of the flange 6, which makes it easy for the annular gasket 3 to be threadedly engaged with the disassembly component 5, so that the compatible sealing ring can be disassembled.

[0048] Specifically, the inner ring wall of the annular retaining ring 501 is provided with spiral protrusions, and screws 503 are symmetrically arranged on the annular retaining ring 501. The screws 503 are threaded through the annular retaining ring 501 and are axially inserted along the annular retaining ring 501.

[0049] Please refer to Figure 6 During the process of removing the compatible metal seal ring stuck on flange 6, the annular retaining ring 501 is manually threaded into the threaded groove of the outer ring of the annular gasket 3 until one side of the annular retaining ring 501 abuts against the mating surface of flange 6. At this time, the symmetrical screws 503 on the annular retaining ring 501 are turned so that the bottom of the screw 503 gradually abuts against the mating surface of flange 6. The screws 503 are turned further, and the thrust applied by the screws 503 to the mating surface of flange 6 is used to apply a reverse force to the compatible metal seal ring fixed by the thread of the annular retaining ring 501, thereby pushing the compatible metal seal ring out of the conveying pipe of flange 6 and quickly removing the compatible metal seal ring.

[0050] Example 3

[0051] Please refer to Figure 2 and Figure 5 In this embodiment, an annular groove is also provided on the outer edge of the conveying pipe of flange 6, and the annular groove is located on the mating surface of flange 6.

[0052] When the two flanges 6 are brought together, the compatible metal seal ring is located between the two flanges 6. At this time, the annular gasket 3 in the middle of the seal ring body 1 will match the annular groove of the two mating surfaces. The upper and lower plates of the annular gasket 3 abut against the groove surface of the annular groove and bear the extrusion force from the two flanges 6, thereby forming a metal seal between the annular gasket 3 and sealing the mating surfaces of the two flanges 6.

[0053] The annular gasket 3 has the same thickness as the standard gasket 7, and the annular groove has the same groove depth as the sealing ring groove. Therefore, the annular gasket 3 and the standard gasket 7 are subjected to the same compressive force from the flange 6 when they are mated, thus ensuring that the metal seal of the standard gasket 7 is not affected. Thus, the standard gasket 7, the annular gasket 3 and the arc-shaped ring wall 2 together form a triple seal, increasing the sealing performance between the flanges 6.

[0054] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solution of this utility model based on the above description. The scope of this utility model is defined by the appended claims.

Claims

1. A compatible metal seal ring comprising a seal ring body (1), characterized in that ； The sealing ring body (1) is sleeved in the inner wall of the conveying pipeline which is penetrated by the flange (6) axis; The outer wall of the axial two ends of the sealing ring body (1) is provided as a profiled outer wall (4), and the wall surface shape of the profiled outer wall (4) matches the shape of the conveying pipeline inner wall; The axial two ends of the sealing ring body (1) are provided with arc-shaped ring walls (2), the arc-shaped ring walls (2) are in a horn shape structure, the diverging end of the horn shape structure faces the outer edge of the sealing ring body (1), and the arc-shaped ring walls (2) abut on the conveying pipeline inner wall in the axial direction of the conveying pipeline.

2. The metal seal ring of claim 1, wherein The arc-shaped ring wall (2) is a metal structure; The arc-shaped ring wall (2) is a bending deformation structure.

3. The metal seal ring of claim 1, wherein the metal seal ring is compatible with a metal seal ring of a different type. The outer edge of the sealing ring body (1) is sequentially provided with an arc-shaped ring wall (2), a profiled outer wall (4), a ring gasket (3), a profiled outer wall (4) and an arc-shaped ring wall (2) in the axial direction.

4. The metal seal ring of claim 1 wherein the metal seal ring is compatible with a metal seal ring of a different design. The outer ring wall of the ring gasket (3) is provided with a threaded groove. The ring gasket (3) is located in the pipe opening of the butt joint position of the two flanges (6).

5. A detachable structure of a compatible metal seal ring, characterized by comprising: The detachable compatible metal sealing ring of any one of claims 1-4 comprises a disassembly assembly (5) which is threadedly connected with the ring gasket (3).

6. The dismounting structure of a compatible metal seal ring according to claim 5, wherein The disassembly assembly (5) comprises a ring-shaped clasp (501), the inner ring wall of the ring-shaped clasp (501) is provided with a spiral protrusion, and the axial side of the ring-shaped clasp (501) is symmetrically provided with a screw (503) which is threadedly penetrated in the ring-shaped clasp (501) and axially penetrated in the ring-shaped clasp (501); When sealing, the disassembly assembly (5) is separated from the ring gasket (3); When disassembling the compatible metal sealing ring, the threaded protrusion (502) in the inner ring of the ring-shaped clasp (501) is matched and connected with the threaded groove in the outer ring wall of the ring gasket (3), the bottom of the screw (503) on the ring-shaped clasp (501) abuts against the butt joint surface of the flange (6), the screw (503) is twisted, and the ring gasket (3) is separated from the pipe opening of the flange (6).

7. The dismounting structure of a compatible metal seal ring according to claim 6, wherein The outer edge of the pipe opening of the flange (6) is provided with a ring-shaped groove, and the diameter of the ring-shaped groove is consistent with the outer ring diameter of the ring gasket (3); When sealing, the plate surfaces at the axial two ends of the ring gasket (3) respectively abut against the groove surfaces of the ring-shaped grooves on the two flanges (6).

Images