Valve seat sealing device of high-pressure valve for pipeline

Abstract

The utility model provides a valve seat sealing device of a high-pressure valve for a pipeline, which belongs to the technical field of valve seat sealing and comprises an annular base, a valve embedding pipe is arranged on the side wall of the annular base in a stepped manner, first embedding grooves are symmetrically formed in the outer wall of the valve embedding pipe, and detachable first sealing rings are embedded in inner cavities of the first embedding grooves. A first caulking groove is formed between the two first sealing rings, a second sealing ring is embedded into an inner cavity of the second caulking groove, and the two first sealing rings are connected into the two first caulking grooves in a sleeved mode through tensile deformation correspondingly. The two annular bases drive the two valve embedding pipes to be embedded into the inner walls of the connectors on the two sides of the valve correspondingly till the two annular bases are clamped to the side walls of the connectors on the two sides of the valve correspondingly, and therefore the fitting degree between the valve and the annular bases is guaranteed, and the sealing performance between the valve and a pipeline is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valve seats, in particular to a valve seat sealing device for a high-pressure valve used in a pipeline. Background Art

[0002] High-pressure valves are used to control the flow of liquids within pipelines. These valves are widely used in fields such as superhard material manufacturing, the chemical industry, petrochemicals, processing technology, isostatic pressing, ultra-high static pressure extrusion, powder metallurgy, metal forming, and geophysical and geological research. They can be used to control the flow of various fluids, including air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. The opening and closing element is a disc-shaped valve plate that rotates around its axis within the valve body, achieving the purpose of opening, closing, or regulating the flow.

[0003] During the installation of the valve with the pipeline, the inlet and outlet on both sides of the valve are connected through the pipelines on both sides. The valve seat is set so that the high-pressure valve is sealed and stably located between the two pipelines, thereby ensuring that the liquid will not leak during the flow process.

[0004] It was found that the following problems exist in the relevant technology: in the process of installing the two sides of the high-pressure valve to the valve seat, they are usually connected through flanges and connected by plane contact. When debris on the contact surface causes a contact surface gap, the sealing between the valve and the valve seat will be reduced, thereby affecting the sealing of the pipeline. In addition, the existing valve seats are two separate valve seats installed from both sides, so that the sealing between the valve seat and the valve connection port needs to be ensured by applying external force, which makes the operation process more cumbersome, affects efficiency, and easily causes poor sealing on one side. In this regard, we propose a new valve seat sealing device for high-pressure valves for pipelines.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background technology section of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art. To solve the valve seat sealing problem existing in the prior art, the present invention provides a valve seat sealing device for a high-pressure valve for a pipeline. The device uses a valve seat sealing assembly in combination with a valve seat docking adjustment assembly to ensure the sealing effect between the valve seat and the valve. The specific technical solution is as follows:

[0007] A valve seat sealing device for a high-pressure valve for a pipeline comprises an annular base, the side wall of the annular base being provided with a valve embedding tube in a stepped manner, the outer wall of the valve embedding tube being symmetrically provided with a first embedding groove, the inner cavity of the first embedding groove being embedded with a detachable first sealing ring, a second embedding groove being formed between two of the first sealing rings, the inner cavity of the second embedding groove being embedded with a second sealing ring, a four-bar linkage assembly for adapting to the valve length being provided between the two annular bases, and an adjustment assembly being provided on the four-bar linkage assembly for driving the deformation of the four-bar linkage assembly.

[0008] In the above technical solution, the four-bar linkage assembly includes a first movable rod and a second movable rod symmetrically rotatably arranged on the circumferential outer wall of the annular base, the free ends of the two first movable rods are rotatably arranged on the first movable frame, and the free ends of the two second movable rods are rotatably arranged on the second movable frame.

[0009] The adjustment assembly includes a driving rod, and the outer walls of the driving rod are symmetrically provided with external threads with opposite threads and the same pitch toward the center at both ends. The outer walls of the driving rod are symmetrically connected with adjustment seats through threads, and the two adjustment seats are symmetrically embedded and installed in the inner cavities of the first movable frame and the second movable frame respectively.

[0010] A guide assembly is arranged between the two annular bases.

[0011] The guide assembly includes guide rods fixedly mounted on the circumferential outer wall of the annular base, and the other ends of the two guide rods are oppositely embedded in the inner cavity of the sleeve rod.

[0012] The first sealing ring and the second sealing ring are both made of elastic material.

[0013] A flange is provided on a side of the annular base away from the valve embedded tube.

[0014] A sealing gasket is embedded in the side of the flange away from the annular base.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the valve seat sealing device for the high-pressure valve for the pipeline:

[0016] 1. The two first sealing rings form a second embedding groove in the circumferential direction relative to the protruding part of the outer wall of the valve embedded tube. The three elastic sealing rings improve the sealing performance of the connection between the valve embedded tube and the valve, thereby ensuring the sealing performance between the annular base and the pipeline.

[0017] Second, the distance between the two annular bases is adjusted by the deformation of the four-bar linkage assembly. The distance between the two annular bases is adjusted according to the distance between the inlet and outlet on both sides of the valve, thereby adjusting according to the length of the valve to ensure the adaptability between the valve, thereby ensuring the fit between the valve and the annular base, and further ensuring the sealing between the valve and the pipeline.

[0018] 3. The valve embedded tube and the annular base form a stepped pipeline, so that after the valve embedded tube is embedded into the inner wall of the valve connection, the annular base is clamped on the side wall of the valve access pipe, thereby improving the sealing between the valve and the pipeline.

[0019] 4. When adjusting the shape of the four-bar linkage assembly, the driving rod is rotated to allow the two adjustment seats connected by threads to move relative to or back to back, thereby bringing convenience to the operation process of relevant personnel.

[0020] 5. In the process of rotating the driving rod to adjust the distance between the two annular bases through the deformation of the four-bar linkage assembly, the two annular bases simultaneously drive the guide rod to slide against the inner wall of the sleeve rod through the second fixed seat. The stability of the distance adjustment process of the two annular bases is ensured by four sets of mutually parallel sleeve rods, avoiding position deviation, thereby ensuring the sealing with the valve installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a valve seat sealing device for a high-pressure valve used in a pipeline according to the utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of a valve seat sealing device for a high-pressure valve used in a pipeline according to the utility model. Figure 2 ;

[0023] Figure 3 This is a schematic exploded view of the structure of a valve seat sealing device for a high-pressure valve for a pipeline according to the present invention;

[0024] Figure 4 This is a schematic diagram of the base structure of the utility model;

[0025] in, Figures 1 to 4The correspondence between the reference numerals and the component names is as follows: 1-annular base, 2-valve embedded tube, 3-first embedding groove, 4-first sealing ring, 5-second sealing ring, 6-first movable rod, 7-first movable frame, 8-sleeve rod, 9-guide rod, 10-flange, 11-sealing gasket, 12-external thread, 13-driving rod, 14-adjusting seat, 15-second fixed seat, 16-first connecting seat, 17-first fixed seat, 18-second connecting seat, 19-third rotating shaft, 20-first rotating shaft, 21-annular groove, 22-second embedding groove, 23-second movable rod, 24-second movable frame, 25-second rotating shaft. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The following is a combination of specific implementation cases and attached Figure 1-4 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0028] A valve seat sealing device for a high-pressure pipeline valve comprises an annular base 1, with a valve insert 2 arranged in a stepped pattern on the sidewall of the annular base 1. The valve insert 2 is fixedly connected to the opposing surfaces of the two bases 1. The valve insert 2 and the annular base form a stepped pipeline. After the valve insert 2 is embedded into the inner wall of the valve connection, the annular base 1 snaps onto the sidewall of the valve access pipe, thereby improving the sealing between the valve and the pipeline.

[0029] The outer wall of the valve insert tube 2 is symmetrically formed with first grooves 3, within which a removable first sealing ring 4 is embedded. A second groove 22 is formed between the two first sealing rings 4, within which a second sealing ring 5 is embedded. Two parallel first grooves 3 are circumferentially symmetrically formed on the outer wall of the valve insert tube 2. The two first sealing rings 4 are respectively stretched and deformed to fit within the interiors of the two first grooves 3. The raised portions of the two first sealing rings 4 relative to the outer wall of the valve insert tube 2 form the circumferential second groove 22, allowing the second sealing ring 5 to elastically deform and fit within the interiors of the second groove 22. The three elastic sealing rings enhance the sealing between the valve insert tube 2 and the valve, thereby ensuring a tight seal between the annular base 1 and the pipeline.

[0030] A four-bar linkage assembly is positioned between the two annular bases 1 to adjust the valve length. The four-bar linkage assembly is also equipped with an adjustment assembly that drives its deformation. The adjustment assembly allows the four-bar linkage assembly to be longitudinally expanded or collapsed. The deformation of the four-bar linkage adjusts the distance between the two annular bases 1. The distance between the two annular bases 1 is adjusted based on the distance between the inlet and outlet ports on either side of the valve, thereby adjusting the distance based on the valve length and ensuring compatibility with the valve.

[0031] Before installing the valve, place the valve to be installed between two annular bases 1 connected by a four-bar linkage. Then, adjust the distance between the two annular bases 1 using the four-bar linkage so that the two annular bases 1 drive the two valve embedding tubes 2 into the inner walls of the valve interface on both sides, until the two annular bases 1 are respectively engaged with the side walls of the valve interface on both sides. This ensures the fit between the valve and the annular base 1, and thus the sealing between the valve and the pipeline.

[0032] The four-bar linkage assembly includes a first movable rod 6 and a second movable rod 23 symmetrically rotatably mounted on the circumferential outer wall of the annular base 1. The free ends of the two first movable rods 6 are both rotatably mounted on the first movable frame 7, and the free ends of the two second movable rods 23 are both rotatably mounted on the second movable frame 24. A first fixed seat 17 is fixedly mounted on the circumferential outer wall of each annular base 1, and a first rotating shaft 20 is vertically mounted on the outer wall of the first fixed seat 17. One end of each of the first movable rod 6 and the second movable rod 23 is fixedly mounted on a first connecting seat 16, so that the two first connecting seats 16 are respectively movably connected to the outside of the first rotating shaft 20 through mounting holes opened on the surface and penetrating the inner cavity, so that one end of the first movable rod 6 and the second movable rod 23 are simultaneously hinged to the first fixed seat 17.

[0033] A second connecting seat 18 is fixedly mounted on the other end of each of the first movable rod 6 and the second movable rod 23. A second rotating shaft 25 is symmetrically embedded in the inner cavity of a movable frame 7, and a third rotating shaft 19 is symmetrically embedded in the inner cavity of a second movable frame 24. The other ends of the two first movable rods 6 are movably connected to the outside of the two second rotating shafts 25 inside the first movable frame 7 through the through holes provided in the surfaces of the two second connecting seats 18. The other ends of the two second movable rods 23 are movably connected to the outside of the two third rotating shafts 19 inside the second movable frame 24 through the through holes provided in the surfaces of the second connecting seat 18, so that the two first movable rods 7 and the two second movable rods 23 are hinged end to end to form a foldable and deformable quadrilateral.

[0034] By adjusting the distance between the first movable frame 7 and the second movable frame 24, the four rods of the four-bar linkage assembly can be longitudinally folded and stretched at the hinge point. During valve installation, adjusting the distance between the first movable frame 7 and the second movable frame 24 adjusts the distance between the two annular bases 1. This distance is adjusted based on the distance between the connecting ports on both sides of the valve, thereby ensuring the seal between the valve and the annular base 1, and thus the seal between the valve and the pipeline.

[0035] It is worth noting that the adjustment assembly includes a drive rod 13, with two symmetrically oriented outer threads 12 with opposite threads and the same pitch extending toward the center of the drive rod 13. The outer wall of the drive rod 13 is symmetrically threaded with adjustment seats 14, which are symmetrically embedded and mounted within the inner cavities of the first movable frame 7 and the second movable frame 24, respectively. Two sets of outer threads 12 with opposite threads and the same pitch extending toward the center of the drive rod 13 are symmetrically oriented toward the center of the drive rod 13. The two adjustment seats 14 are connected to the two sets of outer threads 12 via threaded holes formed on their surfaces and extending through the inner cavities.

[0036] When the drive rod 13 rotates, the two adjustment seats 14 move toward or away from each other. The two adjustment seats 14 are fixedly embedded within the first movable frame 7 and the second movable frame 24, respectively. When adjusting the shape of the four-bar linkage assembly, rotating the drive rod 13 causes the two threaded adjustment seats 14 to move toward or away from each other, thereby facilitating the operation process.

[0037] In addition, a guide assembly is provided between the two annular bases 1 .

[0038] In addition, the guide assembly includes guide rods 9 fixedly mounted on the circumferential outer wall of the annular base 1, and the other ends of the two guide rods 9 are embedded in the inner cavity of the sleeve rod 8. The sleeve rod 8 is a hollow rod body. A second fixing seat 15 is fixedly mounted on the circumferential outer wall of each annular base 1. One end of the guide rod 9 is vertically fixed to the surface of the second fixing seat 15, and the other end of the guide rod 9 extends into the inner cavity of the sleeve rod 8, so that the sleeve rod 8 slides in contact with the outer wall of the guide rod 9.

[0039] During the process of adjusting the distance between the two annular bases 1 by rotating the drive rod 13 and deforming the four-bar linkage, the two annular bases 1 simultaneously drive the guide rod 9 to slide against the inner wall of the sleeve rod 8 via the second fixed seat 15. The four sets of parallel sleeve rods 8 ensure the stability of the distance adjustment process between the two annular bases 1, avoid positional deviation, and thus ensure the sealing of the valve installation.

[0040] Furthermore, both the first sealing ring 4 and the second sealing ring 5 are made of an elastic material. The elastic material may be rubber, which has elastic deformation properties. Through the elastic deformation of the first sealing ring 4 and the second sealing ring 5, the first sealing ring 4 and the second sealing ring 5 are respectively fitted into the first bezel 3 and the second bezel 22, making the installation and removal of the first sealing ring 4 and the second sealing ring 5 more convenient.

[0041] A flange 10 is provided on the side of the annular base 1 away from the valve embedded pipe 2. The flange 10 is fixedly sleeved on the outer wall of the annular base 1, and the flange 10 and the annular base 1 are in the same plane. The flange 10 makes the operation of connecting the annular base 1 to the pipeline more convenient.

[0042] A sealing gasket 11 is embedded in the side of the flange 10 facing away from the annular base 1. A circular groove 21 is circumferentially defined on the surface of the flange 10 that connects to the pipe. The sealing gasket 11 is securely embedded within the groove. This improves the seal between the pipe and the flange 10. The sealing gasket 11 is made of an elastic material, such as rubber.

[0043] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one such feature.

[0045] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0046] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve seat sealing device for a high-pressure valve for a pipeline, comprising an annular base (1), characterized in that: The side wall of the annular base (1) is provided with a valve embedding tube (2) in a stepped manner, and the outer wall of the valve embedding tube (2) is symmetrically provided with a first embedding groove (3), the inner cavity of the first embedding groove (3) is embedded with a detachable first sealing ring (4), a second embedding groove (22) is formed between the two first sealing rings (4), and the inner cavity of the second embedding groove (22) is embedded with a second sealing ring (5), and a four-bar linkage assembly for adapting the valve length is provided between the two annular bases (1), and an adjustment assembly for driving the deformation of the four-bar linkage assembly is provided on the four-bar linkage assembly.

2. The valve seat sealing device for a high-pressure valve for a pipeline according to claim 1, characterized in that: The four-link assembly comprises a first movable rod (6) and a second movable rod (23) symmetrically rotatably arranged on the circumferential outer wall of the annular base (1); the free ends of the two first movable rods (6) are both rotatably arranged on the first movable frame (7); and the free ends of the two second movable rods (23) are both rotatably arranged on the second movable frame (24).

3. The valve seat sealing device for a high-pressure valve for a pipeline according to claim 2, characterized in that: The adjustment assembly includes a driving rod (13), and external threads (12) with opposite threads and the same pitch are symmetrically provided at both ends of the outer wall of the driving rod (13) toward the center. The outer wall of the driving rod (13) is symmetrically threadedly connected with an adjustment seat (14), and the two adjustment seats (14) are symmetrically embedded and installed in the inner cavities of the first movable frame (7) and the second movable frame (24).

4. The valve seat sealing device for a high-pressure valve for a pipeline according to claim 1, characterized in that: A guide assembly is provided between the two annular bases (1).

5. The valve seat sealing device for a high-pressure valve for a pipeline according to claim 4, characterized in that: The guide assembly comprises guide rods (9) fixedly mounted on the circumferential outer wall of the annular base (1), and the other ends of the two guide rods (9) are oppositely embedded in the inner cavity of the sleeve rod (8).

6. The valve seat sealing device for a high-pressure valve for a pipeline according to claim 1, characterized in that: The first sealing ring (4) and the second sealing ring (5) are both made of elastic material.

7. The valve seat sealing device for a high-pressure valve for a pipeline according to claim 1, characterized in that: A flange (10) is provided on the side of the annular base (1) away from the valve embedded tube (2).

8. The valve seat sealing device for a high-pressure valve for a pipeline according to claim 7, characterized in that: A sealing gasket (11) is embedded in the side of the flange (10) away from the annular base (1).

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