High temperature and high pressure resistant stop valve

Abstract

The utility model relates to the technical field of stop valve, concretely is a kind of high temperature and high pressure stop valve, including valve body, the inside installation of valve body has valve rod, the top of valve rod is provided with runner, multiple sealing structure is provided on the valve body, multiple sealing structure includes the first mounting plate and the second mounting plate of the symmetry setting in the both sides of valve rod, the inner wall of first mounting plate and second mounting plate is all provided with fixed frame, and sealing ring is installed on fixed frame.The utility model is set up by multiple sealing structure, improves the sealing effect of valve body, adopts multiple sealing ring to be wrapped in valve body, and multiple sealing effect is played to valve body, which makes when one of sealing ring is affected by high temperature and high pressure sealing property to drop, and there is other sealing ring to continue maintaining the sealing of valve body, to effectively prevent medium from leaking, avoid affecting production safety.

Description

Technical Field

[0001] This utility model relates to a high-temperature and high-pressure resistant shut-off valve, belonging to the field of shut-off valve technology. Background Technology

[0002] A gate valve, also known as a stop valve, is a type of forced-sealing valve. The opening and closing element of a gate valve is a plug-shaped valve disc, with a flat or conical sealing surface. The valve disc moves linearly along the center line of the valve seat. The valve stem can also be a rising and rotating type. It can be used to control the flow of various types of fluids, such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media.

[0003] When existing gate valves are used in harsh conditions (high temperature and high pressure), their sealing performance will decrease significantly, resulting in media leakage and affecting production safety.

[0004] Therefore, there is an urgent need to improve a high-temperature and high-pressure resistant shut-off valve to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature and high-pressure resistant shut-off valve. By setting up a multi-seal structure, the sealing effect of the valve body is improved. Multiple sealing rings are wrapped around the valve body, which plays a multi-layer sealing role. This means that when the sealing performance of one sealing ring decreases due to high temperature and high pressure, other sealing rings can continue to maintain the seal of the valve body, thereby effectively preventing media leakage and avoiding affecting production safety.

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] A high-temperature and high-pressure resistant shut-off valve includes a valve body, a valve stem installed inside the valve body, a rotating wheel at the top of the valve stem, and a multi-seal structure on the valve body. The multi-seal structure includes a first mounting plate and a second mounting plate symmetrically arranged on both sides of the valve stem. A fixing frame is provided on the inner wall of both the first and second mounting plates, and a sealing ring is installed on the fixing frame. A first sealing groove is formed at the top of the valve body, and a first sealing gasket is provided at the bottom of both the first and second mounting plates. Multiple second sealing grooves are formed on one side of the first mounting plate, and multiple second sealing gaskets are formed on one side of the second mounting plate.

[0008] Preferably, the surface of the valve body is provided with a plurality of fixing blocks, and both the first mounting plate and the second mounting plate are provided with a plurality of fastening blocks, and a first bolt is installed between the fixing blocks and the fastening blocks.

[0009] Preferably, a heat insulation sleeve is fitted on the outer side of the first mounting plate and the second mounting plate, and the surface of the heat insulation sleeve is provided with an anti-corrosion layer.

[0010] Preferably, both the first mounting plate and the second mounting plate are provided with threaded blocks on their surfaces, and the bottom of the heat insulation sleeve is provided with a threaded ring.

[0011] Preferably, the surface of the threaded ring is uniformly provided with a plurality of push rods, and the surface of the push rods is provided with anti-slip texture.

[0012] Preferably, the sealing ring is made of graphite and the heat insulation sleeve is made of glass fiber.

[0013] Preferably, a second bolt is installed on the rotating wheel, and a threaded groove adapted to the second bolt is opened on the top of the valve stem.

[0014] This utility model has at least the following beneficial effects:

[0015] By using a multi-seal structure, the sealing effect of the valve body is improved. Multiple sealing rings are wrapped around the valve body, which provides a multi-layer sealing effect. This means that if the sealing performance of one sealing ring decreases due to high temperature and high pressure, the other sealing rings can continue to maintain the seal on the valve body, thereby effectively preventing media leakage and avoiding affecting production safety. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the unfolded structure of the heat insulation sleeve of this utility model;

[0019] Figure 3 This is a schematic diagram showing the unfolded structure of the first mounting plate and the second mounting plate of this utility model;

[0020] Figure 4 This is a bottom view of the internal structure of the heat insulation sleeve of this utility model.

[0021] In the diagram, 1. Valve body; 2. Valve stem; 3. Rotary wheel; 4. Multiple sealing structure; 5. First mounting plate; 6. Second mounting plate; 7. Fixing frame; 8. Sealing ring; 9. First sealing groove; 10. First sealing gasket; 11. Second sealing groove; 12. Second sealing gasket; 13. Fixing block; 14. Fastening block; 15. First bolt; 16. Heat insulation sleeve; 17. Anti-corrosion layer; 18. Threaded block; 19. Threaded ring; 20. Push rod; 21. Second bolt; 22. Threaded groove. Detailed Implementation

[0022] 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. 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 protection scope of the present utility model.

[0023] like Figures 1-4 As shown in the figure, this embodiment provides a high-temperature and high-pressure shut-off valve embodiment.

[0024] A high-temperature and high-pressure resistant shut-off valve includes a valve body 1, a valve stem 2 installed inside the valve body 1, a rotating wheel 3 at the top of the valve stem 2, and a multi-seal structure 4 on the valve body 1. The multi-seal structure 4 includes a first mounting plate 5 and a second mounting plate 6 symmetrically arranged on both sides of the valve stem 2. A fixing frame 7 is provided on the inner wall of both the first mounting plate 5 and the second mounting plate 6, and a sealing ring 8 is installed on the fixing frame 7. A first sealing groove 9 is opened at the top of the valve body 1, and a first sealing gasket 10 is provided at the bottom of both the first mounting plate 5 and the second mounting plate 6. Multiple second sealing grooves 11 are opened on one side of the first mounting plate 5, and multiple second sealing gaskets 12 are provided on one side of the second mounting plate 6. The sealing effect of the valve body 1 is improved by setting up a multi-seal structure 4. The first mounting plate 5 and the second mounting plate 6 are combined on the top of the valve body 1 and wrapped around the valve stem 2. At this time, the multiple sealing rings 8 inside the first mounting plate 5 and the second mounting plate 6 are tightly attached to the valve stem 2, which plays a multi-layer sealing role for the valve body 1. At the same time, the first sealing groove 9 and the first sealing gasket 10 can seal the connection between the first mounting plate 5 and the second mounting plate 6 and the valve body 1. The second sealing groove 11 and the second sealing gasket 12 can seal the connection between the first mounting plate 5 and the second mounting plate 6. This means that when the sealing performance of one of the sealing rings 8 is affected by high temperature and high pressure, there are other sealing rings 8 to continue to maintain the seal on the valve body 1, thereby effectively preventing the leakage of the medium and avoiding affecting production safety.

[0025] In this embodiment, as Figures 1-4As shown, the surface of the valve body 1 is provided with multiple fixing blocks 13, and the first mounting plate 5 and the second mounting plate 6 are each provided with multiple fastening blocks 14. A first bolt 15 is installed between the fixing blocks 13 and the fastening blocks 14. A heat insulation sleeve 16 is sleeved on the outside of the first mounting plate 5 and the second mounting plate 6. The surface of the heat insulation sleeve 16 is provided with an anti-corrosion layer 17. The surface of the first mounting plate 5 and the second mounting plate 6 are each provided with threaded blocks 18. A threaded ring 19 is provided at the bottom of the heat insulation sleeve 16. By using the fixing block 13, fastening block 14, and first bolt 15, the first mounting plate 5 and the second mounting plate 6 are installed on the valve body 1 by connecting and fastening the fixing block 13 and fastening block 14 with the first bolt 15. This not only makes the installation more secure but also allows for the disassembly of the first mounting plate 5 and the second mounting plate 6. This facilitates the removal and replacement of the internal sealing rings 8 when the sealing performance of multiple sealing rings 8 deteriorates, as the sealing rings 8 are tenoned in the fixing frame 7. The heat insulation sleeve 16 and the anti-corrosion layer 17 are used to fit the heat insulation sleeve 16 onto the first mounting plate 5 and the second mounting plate 6. The outer side can provide heat insulation for the first mounting plate 5 and the second mounting plate 6, thereby reducing the impact of high temperature and high pressure on the sealing ring 8 and extending its service life. The anti-corrosion layer 17 increases the corrosion resistance of the heat insulation sleeve 16 and prevents damage to the heat insulation sleeve 16. Through the setting of the threaded block 18 and the threaded ring 19, the heat insulation sleeve 16 is fastened to the first mounting plate 5 and the second mounting plate 6 by the connection of the threaded block 18 and the threaded ring 19, effectively preventing it from falling off. At the same time, it can also facilitate the disassembly of the heat insulation sleeve 16. After the heat insulation sleeve 16 is disassembled, the first mounting plate 5 and the second mounting plate 6 can be easily disassembled and installed.

[0026] In this embodiment, as Figures 1-4 As shown, multiple push rods 20 are evenly arranged on the surface of the threaded ring 19. The surface of the push rods 20 is provided with anti-slip texture. The sealing ring 8 is made of graphite, and the heat insulation sleeve 16 is made of glass fiber. A second bolt 21 is installed on the rotating wheel 3, and a threaded groove 22 that matches the second bolt 21 is opened on the top of the valve stem 2. The push rods 20 increase the operating range and friction of the threaded ring 19, making it easier to rotate the threaded ring 19 on the threaded block 18 to install and remove the heat insulation sleeve 16. By making the sealing ring 8 of graphite and the heat insulation sleeve 16 of glass fiber, both have high temperature resistance. The second bolt 21 and the threaded groove 22 allow the rotating wheel 3 to be disassembled from the top of the valve stem 2, making it easy to remove the heat insulation sleeve 16 from the valve stem 2.

[0027] In this embodiment, as Figures 1-4 As shown in the figure, the working process of the high-temperature and high-pressure shut-off valve provided in this embodiment is as follows:

[0028] The first mounting plate 5 and the second mounting plate 6 are combined on the top of the valve body 1 and wrapped around the valve stem 2. At this time, the multiple sealing rings 8 inside the first mounting plate 5 and the second mounting plate 6 are tightly attached to the valve stem 2, which plays a multi-layer sealing role for the valve body 1. At the same time, the first sealing groove 9 and the first sealing gasket 10 can seal the connection between the first mounting plate 5 and the second mounting plate 6 and the valve body 1. The second sealing groove 11 and the second sealing gasket 12 can seal the connection between the first mounting plate 5 and the second mounting plate 6. This means that when one of the sealing rings 8 is affected by high temperature and high pressure, the sealing performance decreases, but there are other sealing rings 8 to continue to maintain the seal on the valve body 1.

[0029] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A high-temperature and high-pressure resistant stop valve, comprising a valve body (1), a valve rod (2) is installed inside the valve body (1), and a rotating wheel (3) is arranged at the top of the valve rod (2), characterized in that: The valve body (1) is provided with a multiple sealing structure (4), which comprises a first mounting plate (5) and a second mounting plate (6) symmetrically arranged on both sides of the valve rod (2), the inner walls of the first mounting plate (5) and the second mounting plate (6) are provided with a fixed frame (7), the fixed frame (7) is provided with a sealing ring (8), the top of the valve body (1) is provided with a first sealing groove (9), the bottoms of the first mounting plate (5) and the second mounting plate (6) are provided with a first sealing pad (10), one side of the first mounting plate (5) is provided with a plurality of second sealing grooves (11), and one side of the second mounting plate (6) is provided with a plurality of second sealing pads (12).

2. A high temperature and high pressure resistant globe valve according to claim 1, characterized in that: The surface of the valve body (1) is provided with a plurality of fixed blocks (13), the first mounting plate (5) and the second mounting plate (6) are provided with a plurality of fastening blocks (14), and the first mounting plate (5) and the second mounting plate (6) are provided with a plurality of fastening blocks (14).

3. The high temperature and high pressure resistant globe valve according to claim 1, wherein: The outer sides of the first mounting plate (5) and the second mounting plate (6) are provided with a heat insulation sleeve (16), and the surface of the heat insulation sleeve (16) is provided with a corrosion-resistant layer (17).

4. A high temperature and high pressure resistant globe valve according to claim 3, characterized in that: The surfaces of the first mounting plate (5) and the second mounting plate (6) are provided with threaded blocks (18), and the bottom of the heat insulation sleeve (16) is provided with a threaded ring (19).

5. A high temperature and high pressure resistant globe valve according to claim 4, characterized in that: The surface of the threaded ring (19) is uniformly provided with a plurality of push rods (20), and the surface of the push rod (20) is provided with anti-skid lines.

6. A high temperature and high pressure resistant globe valve according to claim 5, characterized in that: The material of the sealing ring (8) is graphite, and the material of the heat insulation sleeve (16) is glass fiber.

7. A high temperature and high pressure resistant globe valve according to claim 1, characterized in that: The runner (3) is provided with a second bolt (21), and the top of the valve rod (2) is provided with a threaded groove (22) matched with the second bolt (21).

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