Leakage-proof sealing ring for Christmas tree valve

Abstract

The utility model relates to the technical field of high-pressure sealing, and discloses a Christmas tree valve leakproof sealing ring which comprises a filling mechanism, a deformation mechanism and a limiting mechanism, the filling mechanism comprises a transverse filling pad and a longitudinal filling pad, and the inner side wall of the transverse filling pad is fixedly connected with the middle of the outer surface of the longitudinal filling pad; the deformation mechanism comprises a plurality of filling strips and a plurality of adjusting cavities, the filling strips are fixedly connected to the outer surfaces of the transverse filling pad and the longitudinal filling pad correspondingly, and the adjusting cavities are formed in the inner side walls of the transverse filling pad and the longitudinal filling pad correspondingly and located on one sides of the filling strips. According to the anti-leakage sealing ring for the Christmas tree valve, through matched arrangement of the transverse filling pad and the longitudinal filling pad, under connection and fixation between the flange plates, a gap between the two flange plates can be fully filled, and meanwhile, the gap can be covered and sealed from the interiors of the flanges.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure sealing technology, specifically to a leak-proof sealing ring for a tree valve. Background Technology

[0002] In oil extraction operations, the wellhead valve is a core component for oil well fluid control, and its sealing performance directly affects safe production and efficient development of oil and gas resources. Currently, the sealing rings of the flange connection of the wellhead valve are subjected to long-term high pressure, corrosion and other complex working conditions.

[0003] Traditional sealing rings often employ a single transverse or longitudinal filling structure, which can only cover one side of the flange connection gap and cannot form a multi-dimensional sealing system. When the fluid pressure inside the oil well fluctuates, the medium can easily seep through the uncovered area of ​​the flange gap. Especially under high pressure, a single sealing layer is prone to damage due to uneven stress, leading to a significant increase in leakage risk. Furthermore, existing sealing rings generally lack a rigid limiting structure. When the flange connection is subjected to compressive loads, the sealing material is prone to bulging to both sides or being squeezed out of the installation gap due to stress concentration, resulting in seal failure. Especially under the condition of frequent valve opening and closing, the sealing ring is prone to structural loosening after repeated deformation, further reducing the reliability of the seal. Utility Model Content

[0004] This invention provides a leak-proof sealing ring for a tree valve, which can fully fill the gap between flanges and uses longitudinal and transverse cooperation to form a more perfect sealing state. It can also limit the deformation of the sealing ring and reduce leakage caused by deformation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Design a leak-proof sealing ring for a tree trunk valve, comprising a filling mechanism, a deformation mechanism, and a limiting mechanism, wherein:

[0007] The filling mechanism includes a transverse filling pad and a longitudinal filling pad, wherein the inner sidewall of the transverse filling pad is fixedly connected to the middle of the outer surface of the longitudinal filling pad;

[0008] The deformation mechanism includes multiple filling strips and multiple adjustment cavities. The multiple filling strips are respectively fixedly connected to the outer surfaces of the transverse filling pad and the longitudinal filling pad. The multiple adjustment cavities are respectively opened on the inner sidewalls of the transverse filling pad and the longitudinal filling pad, and are located on one side of the multiple filling strips.

[0009] The limiting mechanism includes multiple mounting cavities and multiple steel rings. The multiple mounting cavities are all opened inside the transverse filling pad, and the multiple steel rings are respectively fixedly installed on the inner wall of the multiple mounting cavities.

[0010] Optionally, the filling mechanism further includes two air storage chambers, both of which are located inside the longitudinal filling pad.

[0011] Optionally, the outer ring of the transverse filling pad is fixedly connected to an outer limiting ring, and the middle of the inner ring of the longitudinal filling pad is fixedly connected to an inner limiting ring.

[0012] Optionally, positioning rings are fixedly connected to the top and bottom of the longitudinal filling pad, and extrusion mechanisms are provided at the top and bottom of the outer surface of the transverse filling pad.

[0013] Optionally, the extrusion mechanism includes two first pressure rings and two second pressure rings. The two first pressure rings are fixedly installed on the outer rings of the top and bottom of the transverse filling pad, respectively, and the two second pressure rings are fixedly installed on the inner rings of the top and bottom of the transverse filling pad, respectively.

[0014] Optionally, a first flange is fitted above the outer surface of the longitudinal filling pad, and a second flange is fitted below the outer surface of the longitudinal filling pad.

[0015] Optionally, the bottom of the first flange and the top of the second flange are in contact with the outer surface of the transverse filling gasket, and the outer surfaces of the two first pressure rings and the two second pressure rings are in contact with the bottom of the first flange and the top of the second flange, respectively.

[0016] Optionally, the bottom of the inner wall of the first flange and the top of the inner wall of the second flange are in contact with the outer surfaces of the plurality of filler strips, and the inner walls of the first flange and the second flange are respectively sleeved with the outer surfaces of the two positioning rings.

[0017] This utility model provides a leak-proof sealing ring for a tree valve, which has the following advantages:

[0018] This leak-proof sealing ring for the tree valve, through the coordinated arrangement of transverse and longitudinal filling gaskets, can fully fill the gap between two flanges when they are connected and fixed. It also provides internal sealing to the gap. Even under high pressure, the longitudinal filling gasket can still effectively seal the gap thanks to its sufficient coverage area, ensuring a tight seal. Furthermore, the coordinated arrangement of multiple filling strips and adjusting cavities allows for the covering and wrapping of the inner edges of the flanges when they are mated together. It can also deform when the two flanges are squeezed together, causing the packing strip to deform into the regulating cavity. At the same time, with the deformation of the longitudinal packing pad under pressure, the packing strip can fully compress and seal the flange, thus preventing leakage from the gap between the longitudinal packing point and the flange. Through the cooperation between multiple mounting cavities and steel rings, multiple steel rings of different sizes can be stacked and squeezed together under the mutual compression between the two flanges. The rigidity between the multiple steel rings prevents the transverse packing pad from deforming under pressure, thus ensuring the relative sealing between the two flanges once again. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the installation structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the steel ring installation structure of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 5 A schematic diagram of the structure of the gas storage chamber of this utility model is provided.

[0024] Figure 6 This is a schematic diagram of the deformation mechanism of this utility model.

[0025] In the diagram: 1. Filling mechanism; 101. Transverse filling pad; 102. Longitudinal filling pad; 103. Gas storage chamber; 2. Outer limiting ring; 3. Inner limiting ring; 4. Positioning ring; 5. Extrusion mechanism; 6. Deformation mechanism; 601. Filling strip; 602. Adjustment cavity; 7. Limiting mechanism; 701. Mounting cavity; 702. Steel ring; 8. First flange; 9. Second flange. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] Please see Figures 1 to 6 This utility model provides a sealing ring for use in sealing the connecting parts of a tree trunk during oil extraction. This embodiment improves the structure of the sealing ring to provide sufficient sealing and reduce deformation leakage. Specifically, taking the sealing of a tree trunk valve as an example, as a preferred embodiment, the sealing ring is a leak-proof sealing ring for the tree trunk valve, capable of providing sufficient sealing to the connecting parts of the tree trunk valve.

[0028] Please see Figures 1 to 6 This utility model provides a technical solution: a leak-proof sealing ring for a tree valve, which is mainly used in the process of oil extraction to seal the connecting parts of the tree.

[0029] It includes a filling mechanism 1, a deformation mechanism 6, and a limiting mechanism 7, wherein:

[0030] The filling mechanism 1 includes a transverse filling pad 101 and a longitudinal filling pad 102, with the inner sidewall of the transverse filling pad 101 fixedly connected to the middle of the outer surface of the longitudinal filling pad 102.

[0031] The deformation mechanism 6 includes multiple filling strips 601 and multiple adjusting cavities 602. The multiple filling strips 601 are fixedly connected to the outer surfaces of the transverse filling pad 101 and the longitudinal filling pad 102, respectively. The multiple adjusting cavities 602 are respectively opened on the inner sidewalls of the transverse filling pad 101 and the longitudinal filling pad 102, and are located on one side of the multiple filling strips 601.

[0032] The limiting mechanism 7 includes multiple mounting cavities 701 and multiple steel rings 702. The multiple mounting cavities 701 are all opened inside the transverse filling pad 101, and the multiple steel rings 702 are respectively fixedly installed on the inner wall of the multiple mounting cavities 701.

[0033] In this embodiment, the transverse filling gasket 101, as part of the filling mechanism 1, cooperates with the longitudinal filling gasket 102 to fill the transverse gap between the two flanges. Simultaneously, it provides an installation base for other components such as the outer limiting ring 2 and the compression mechanism 5. When the flanges are connected and fixed, it effectively fills the transverse gap, preventing media leakage. Working in conjunction with the longitudinal filling gasket 102, it forms a multi-dimensional sealing structure, enhancing overall sealing performance. Even under high-pressure conditions, it maintains a certain degree of stability and preserves the sealing effect on the transverse gap. The longitudinal filling gasket 102, connected to the transverse filling gasket 101, covers and seals the gap from the inside of the flange, withstands internal pressure, and expands outward to further tighten the gap and improve sealing. The sealing effect is achieved by providing installation positions for components such as the gas storage chamber 103, inner limit ring 3, and positioning ring 4. Under high pressure, the internal pressure compresses outward, and its large coverage area effectively seals the gaps, compensating for the shortcomings of a single transverse seal. Even under pressure fluctuations, it can maintain the seal on longitudinal gaps through its deformation and elastic recovery capabilities, effectively reducing the risk of leakage. The filler strip 601 is fixedly connected to the outer surfaces of the transverse filler pad 101 and the longitudinal filler pad 102, respectively. When the two flanges are installed together, it covers and wraps the inner edge of the flange. When the flanges are squeezed together, the filler strip 601 deforms, reducing the existence of gaps by covering the flange edges and preventing medium leakage. When subjected to pressure deformation, the filler strip 601 deforms into the regulating cavity 602. Simultaneously, the deformation of the longitudinal filler pad 102 fully compresses the flange, enhancing the sealing effect and preventing leakage from the gap between the longitudinal filler pad 102 and the flange. The regulating cavity 602 is located on the inner wall of both the transverse and longitudinal filler pads 101, situated on one side of the filler strip 601. This provides space for the deformation of the filler strip 601, allowing it to deform smoothly into the regulating cavity 602 under pressure, preventing damage due to lack of deformation area. Furthermore, the presence of the regulating cavity 602 helps the filler strip 601 better adapt to pressure changes, improving the sealing performance and service life of the sealing ring. The mounting cavity 701 is located within the transverse filler pad... Inside the mounting cavity 101, a mounting position is provided for the steel ring 702, ensuring that the steel ring 702 can be accurately installed inside the transverse filling gasket 101, guaranteeing that the steel ring 702 can perform its limiting function. At the same time, the design of the mounting cavity 701 also helps to protect the steel ring 702 from damage by external factors. The steel ring 702 is fixedly installed on the inner wall of the mounting cavity 701. When the two flanges are pressed against each other, multiple steel rings 702 of different sizes are stacked and pressed against each other. With the rigidity of the steel ring 702, the deformation of the transverse filling gasket 101 under pressure is limited, avoiding the transverse filling gasket 101 from sealing failure due to excessive deformation. This further ensures the relative sealing between the two flanges and improves the stability and reliability of the sealing ring under high pressure.

[0034] In the above embodiment, as a preferred solution, the filling mechanism 1 further includes two air storage chambers 103, both of which are opened inside the longitudinal filling pad 102. When the sealing ring is subjected to pressure, the gas in the air storage chamber 103 can play a buffering role, adjusting the deformation degree of the longitudinal filling pad 102, so that the longitudinal filling pad 102 can deform more evenly when under pressure, avoiding damage caused by local stress concentration. At the same time, after the pressure is released, the air storage chamber 103 helps the longitudinal filling pad 102 to return to its original shape, extending the service life of the sealing ring and maintaining good sealing performance.

[0035] In the above embodiments, as a preferred option, an outer limiting ring 2 is fixedly connected to the outer ring of the transverse filling gasket 101, and an inner limiting ring 3 is fixedly connected to the middle of the inner ring of the longitudinal filling gasket 102. The outer limiting ring 2 is fixedly connected to the outer ring of the transverse filling gasket 101, limiting the degree of outward expansion of the transverse filling gasket 101, preventing the transverse filling gasket 101 from being excessively deformed and squeezed out of the flange connection part under high pressure, ensuring the structural integrity of the sealing ring, and at the same time, enhancing the fit between the sealing ring and the outer side of the flange, further improving the sealing effect. The inner limiting ring 3 is fixedly connected to the middle of the inner ring of the longitudinal filling gasket 102, limiting the degree of inward contraction of the longitudinal filling gasket 102, ensuring that the longitudinal filling gasket 102 will not be excessively concave inward when under pressure, maintaining its sealing effect on the internal gap of the flange, and cooperating with the outer limiting ring 2 to jointly ensure the stable shape of the sealing ring under high pressure, improving the reliability of the seal.

[0036] In the above embodiments, as a preferred option, positioning rings 4 are fixedly connected to the top and bottom of the longitudinal filling pad 102, and extrusion mechanisms 5 are provided at the top and bottom of the outer surface of the transverse filling pad 101. The positioning rings 4 are fixed to the top and bottom of the longitudinal filling pad 102, which can provide guidance for the device during installation, so that the longitudinal filling pad 102 can be accurately fed into the inner wall of the first flange 8 and the second flange 9. At the same time, the longitudinal filling pad 102 can be fixed by its own fixed size, so as to avoid large deformation of the longitudinal filling pad 102 due to large pressure.

[0037] In the above embodiment, as a preferred option, the extrusion mechanism 5 includes two first pressure rings and two second pressure rings. The two first pressure rings are respectively fixedly installed on the outer rings of the top and bottom of the transverse filling pad 101, and the two second pressure rings are respectively fixedly installed on the inner rings of the top and bottom of the transverse filling pad 101. Through the cooperation of the first pressure rings and the second pressure rings, the transverse filling pad 101 can be extruded when the first flange 8 and the second flange 9 are relatively fastened, thereby extruding the multiple steel rings 702. This can both extrude and deform the transverse filling pad 101, causing it to be extruded and filled towards the bolt hole, thus reducing the possibility of leakage from the bolt hole, and extrude and stack the multiple steel rings 702. This can then be achieved by using the rigidity of the steel rings 702 to limit the deformation of the transverse filling pad 101 under pressure, thus preventing the transverse filling pad 101 from failing to seal due to excessive deformation.

[0038] In the above embodiment, as a preferred option, a first flange 8 is fitted above the outer surface of the longitudinal filling gasket 102, and a second flange 9 is fitted below the outer surface of the longitudinal filling gasket 102. The first flange 8 and the second flange 9 are connected to each other to clamp the transverse filling gasket 101 and the longitudinal filling gasket 102, thereby sealing the connection part of the tree valve.

[0039] In the above embodiments, as a preferred option, the bottom of the first flange 8 and the top of the second flange 9 are in contact with the outer surface of the transverse filling gasket 101, and the outer surfaces of the two first pressure rings and the two second pressure rings are in contact with the bottom of the first flange 8 and the top of the second flange 9, respectively.

[0040] In the above embodiments, as a preferred option, the bottom of the inner wall of the first flange 8 and the top of the inner wall of the second flange 9 are in contact with the outer surfaces of the plurality of filler strips 601, and the inner walls of the first flange 8 and the second flange 9 are respectively sleeved with the outer surfaces of the two positioning rings 4.

[0041] In this invention, the working steps of the device are as follows:

[0042] 1. First, align the first flange 8 and the second flange 9, and fasten them together with bolts. During the bolt tightening process, the bottom of the first flange 8 presses against the first pressure ring at the top of the transverse filling gasket 101, and the top of the second flange 9 presses against the second pressure ring at the bottom of the transverse filling gasket 101, pushing the transverse filling gasket 101 to deform towards the flange bolt holes and edge gaps, filling the transverse gaps.

[0043] 2. When the internal fluid pressure of the oil well increases, the gas storage cavity 103 inside the longitudinal filling pad 102 is compressed and contracts. The gas buffering effect causes the longitudinal filling pad 102 to expand outward evenly, so that the longitudinal filling pad 102 fully contacts the inner surface of the flange, ensuring the coverage and sealing of the gaps on the inner side of the flange. Under pressure, the filling strip 601 is further embedded into the regulating cavity 602 to prevent fluid from seeping through the flange gap.

[0044] 3. The rigid support structure of steel ring 702 effectively resists flange extrusion stress and prevents the sealing layer from thinning or breaking due to plastic deformation of transverse filling gasket 101. It is especially suitable for high-frequency operating conditions where valves are frequently opened and closed. The sleeve structure between the positioning ring 4 and the inner wall of the flange ensures that the sealing ring remains in a fixed position during repeated pressure fluctuations, preventing sealing failure due to displacement.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof sealing ring for a tree trunk valve, characterized in that: It includes a filling mechanism (1), a deformation mechanism (6), and a limiting mechanism (7), wherein: The filling mechanism (1) includes a transverse filling pad (101) and a longitudinal filling pad (102), wherein the inner sidewall of the transverse filling pad (101) is fixedly connected to the middle of the outer surface of the longitudinal filling pad (102); The deformation mechanism (6) includes multiple filling strips (601) and multiple adjustment cavities (602). The multiple filling strips (601) are respectively fixedly connected to the outer surfaces of the transverse filling pad (101) and the longitudinal filling pad (102). The multiple adjustment cavities (602) are respectively opened on the inner sidewalls of the transverse filling pad (101) and the longitudinal filling pad (102), and are located on one side of the multiple filling strips (601). The limiting mechanism (7) includes multiple mounting cavities (701) and multiple steel rings (702). The multiple mounting cavities (701) are all opened inside the transverse filling pad (101), and the multiple steel rings (702) are respectively fixedly installed on the inner wall of the multiple mounting cavities (701).

2. A leak-proof seal ring for a valve of an oil tree according to claim 1, characterized in that: The filling mechanism (1) also includes two air storage chambers (103), both of which are located inside the longitudinal filling pad (102).

3. The leak-proof seal ring for a Christmas tree valve as claimed in claim 1, wherein: The outer ring of the transverse filling pad (101) is fixedly connected to an outer limiting ring (2), and the middle of the inner ring of the longitudinal filling pad (102) is fixedly connected to an inner limiting ring (3).

4. The leak-proof seal ring for a Christmas tree valve as claimed in claim 1, wherein: The top and bottom ends of the longitudinal filling pad (102) are fixedly connected with positioning rings (4), and the top and bottom of the outer surface of the transverse filling pad (101) are provided with extrusion mechanisms (5).

5. A leak-proof seal ring for a valve of an oil tree according to claim 4, characterized in that: The extrusion mechanism (5) includes two first pressure rings (501) and two second pressure rings (502). The two first pressure rings (501) are fixedly installed on the outer rings of the top and bottom of the transverse filling pad (101), respectively, and the two second pressure rings (502) are fixedly installed on the inner rings of the top and bottom of the transverse filling pad (101), respectively.

6. A leak-proof seal ring for a valve of an oil tree according to claim 5, characterized in that: A first flange (8) is fitted above the outer surface of the longitudinal filling gasket (102), and a second flange (9) is fitted below the outer surface of the longitudinal filling gasket (102).

7. A leak-proof seal ring for a valve of an oil tree according to claim 6, characterized in that: The bottom of the first flange (8) and the top of the second flange (9) are in contact with the outer surface of the transverse filling gasket (101), and the outer surfaces of the two first pressure rings (501) and the two second pressure rings (502) are in contact with the bottom of the first flange (8) and the top of the second flange (9), respectively.

8. A leak-proof seal ring for a valve of an oil tree according to claim 7, characterized in that: The bottom of the inner wall of the first flange (8) and the top of the inner wall of the second flange (9) are in contact with the outer surfaces of the plurality of filling strips (601), and the inner walls of the first flange (8) and the second flange (9) are respectively sleeved with the outer surfaces of the two positioning rings (4).

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