High-temperature-resistant gate valve

Abstract

The utility model relates to the field of gate valves, in particular to a high-temperature-resistant gate valve which comprises a gate valve body, a main body used for bearing circulation of media, a main valve seat and a high-temperature-resistant protective layer, the main valve seat is arranged above the gate valve body and used for being connected with the gate valve body, the high-temperature-resistant protective layer is pasted inside the gate valve body, and a valve inner ring is fixedly installed inside the gate valve body. The high-temperature-resistant gate valve is provided with the high-temperature-resistant protection layer, the valve inner ring, the fastening bolt, the high-temperature-resistant sealing ring, the valve plate and the front plug plate, when the gate valve is used in an occasion where high-temperature fluid needs to be treated, the high-temperature-resistant protection layer attached to the interior of the gate valve body enhances the high-temperature-resistant capacity of the gate valve, loss of the gate valve caused by the high-temperature fluid is reduced, and the service life of the gate valve is prolonged. The strength, rigidity and high-temperature resistance of the gate valve are improved, then the valve inner rings and the high-temperature-resistant sealing rings are arranged on the two sides of the interior of the gate valve body, and therefore when the gate valve is closed up and down through the valve plate, the front plug plate can make contact with the high-temperature-resistant sealing rings, and the valve inner rings are blocked in sequence.

Description

Technical Field

[0001] The utility model relates to the field of gate valves, in particular to a high-temperature resistant gate valve. Background Art

[0002] A gate valve is a commonly used fluid control device, which mainly controls the flow of fluid by lifting and lowering the gate of the opening and closing part. The opening and closing part of the gate valve is the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. When the gate valve is closed, the sealing surface can rely on the medium pressure to seal, that is, self-sealing, or it can rely on external force to forcibly press the gate against the valve seat to ensure the sealing, that is, forced sealing. According to different structural forms and uses, gate valves can be divided into many types, such as flat gate valves, elastic seat seal gate valves, conical gate valves, double gate valves, diaphragm gate valves, rotary gate valves, pneumatic gate valves, etc.

[0003] After searching, a gate valve with publication number CN211574309U specifically discloses a gate valve including a valve body, a valve stem and a valve plate. A spiral cavity is arranged in the valve plate, and the spiral cavity is spirally connected to the valve stem. The valve plate rises or falls by rotating the valve stem, and the valve stem is screwed into or out of the spiral cavity. A guide slider is respectively arranged on both sides of the valve plate, and the guide slider is slidably connected to the inner wall of the valve body. In this application, the valve stem does not need to rise or fall, and only the valve plate needs to rise or fall, which solves the problem of the valve stem occupying a large space.

[0004] During the use of existing gate valves, due to their wide application range, they are used in industries such as petroleum, chemical, electric power, metallurgy, etc., especially in situations where high-temperature fluids need to be processed. Gate valves that lack internal high-temperature resistance will have their materials changed, such as reduced hardness and plastic deformation. These changes will directly affect the strength and rigidity of the gate valve, and thus affect its overall performance and service life. In addition, the gate valves in the above-mentioned comparative cases also lack the ability to resist high temperatures. After long-term use, processing high-temperature fluids will cause the originally closed and sealed gate valves to leak.

[0005] Therefore, it is necessary to invent a high temperature resistant gate valve to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a high temperature resistant gate valve, which enhances the high temperature resistance of the gate valve itself through a high temperature resistant protective layer, a valve inner ring, fastening bolts, a high temperature resistant sealing ring, a valve plate and a front plug plate, reduces the loss of the gate valve caused by high temperature fluid, and improves the strength, rigidity and high temperature resistance of the gate valve itself. The front plug plate closes the valve inner ring, and the valve plate closes the gate valve body, thereby forming a double closure, which greatly enhances the sealing of the gate valve in a high temperature environment, thus reducing the loss of the valve plate caused by the high temperature fluid, and reducing the probability of leakage of the originally closed and sealed gate valve, thereby improving the overall performance and The effect of service life is to solve the problem that during the use of gate valves in the prior art, due to the wide application range of gate valves, they are used in the petroleum, chemical, electric power, metallurgy and other industries, especially in occasions where high-temperature fluids need to be processed, the gate valves that lack internal high-temperature resistance will have their materials changed, such as reduced hardness, plastic deformation, etc. These changes will directly affect the strength and rigidity of the gate valve, and thus affect its overall performance and service life. In addition, the gate valves in the above-mentioned comparative cases also lack the ability to resist high temperatures. After long-term use, the processing of high-temperature fluids will cause the originally closed and sealed gate valves to leak.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high temperature resistant gate valve, comprising a gate valve body, which is a main body for carrying the flow of medium;

[0008] The main valve seat is arranged above the gate valve body and is used to connect the gate valve body. A high temperature resistant protective layer is pasted inside the gate valve body. A valve inner ring is fixedly installed inside the gate valve body. A fastening bolt penetrates the outside of the valve inner ring. One end of the fastening bolt is movably connected to a high temperature resistant sealing ring.

[0009] The valve plate is arranged on one side of the inner ring of the valve, and is used to open and close the gate valve up and down, and a front plug plate is fixedly installed on one side of the valve plate, a threaded screw rod passes through the top of the valve plate, a fixing bolt passes through the top of the main valve seat, one end of the fixing bolt is movably connected to the upper valve seat, an inner movable groove is opened inside the upper valve seat, and an internal threaded sleeve is movably connected inside the inner movable groove.

[0010] Preferably, a mounting flange is fixedly mounted on the outside of the gate valve body, an embedded groove is provided inside the mounting flange, and a threaded hole is provided outside the mounting flange.

[0011] Preferably, the high temperature resistant protective layer is tightly fitted to the gate valve body, and the material of the high temperature resistant protective layer is: high entropy alloy.

[0012] Preferably, the high temperature resistant sealing ring is threadedly connected to the valve inner ring, and the valve inner ring is symmetrically arranged with respect to the center axis of the gate valve body.

[0013] Preferably, the upper valve seat is threadedly connected to the main valve seat, and the internal threaded sleeve is movably connected to the upper valve seat.

[0014] Preferably, a hexagonal screw is fixedly mounted on the top of the internal threaded sleeve, an external rotating sleeve is arranged outside the hexagonal screw, and a hand wheel is fixedly mounted on the top of the external rotating sleeve.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] 1. The utility model is provided with a high temperature resistant protective layer, a valve inner ring, a fastening bolt, a high temperature resistant sealing ring, a valve plate and a front plug plate. When the gate valve is used in an occasion where a high temperature fluid needs to be processed, the high temperature resistant protective layer attached to the inside of the gate valve body enhances the high temperature resistance of the gate valve itself, reduces the loss of the gate valve caused by the high temperature fluid, and improves the strength, rigidity and high temperature resistance of the gate valve itself. Then, a valve inner ring and a high temperature resistant sealing ring are arranged on both sides of the inside of the gate valve body. In this way, when the gate valve is closed up and down by the valve plate, the front plug plate will contact the high temperature resistant sealing ring, first blocking the valve inner ring, and then cooperating with the valve plate that was originally lowered and closed, so that the front plug plate closes the valve inner ring, and the valve plate closes the gate valve body, thereby forming a double closure, which greatly enhances the sealing of the gate valve in a high temperature environment, thus reducing the loss of the valve plate caused by the high temperature fluid, and reducing the probability of leakage of the originally closed and sealed gate valve, thereby improving the overall performance and service life of the gate valve.

[0017] 2. The utility model is provided with an upper valve seat, an inner movable groove, an inner threaded sleeve, a hexagonal screw, an outer rotating sleeve and a handwheel. When the gate valve is opened and closed, the outer rotating sleeve and the handwheel can be directly sleeved on the hexagonal screw. By driving the rotation of the hexagonal screw, the inner threaded sleeve is synchronously rotated inside the inner movable groove. Then, as the inner threaded sleeve rotates, the affected threaded screw is lifted upward inside the inner threaded sleeve to drive the valve plate to move up and down to complete the opening and closing operation. This is simple and quick to operate. At the same time, after closing the gate valve, the outer rotating sleeve and the handwheel can be directly removed to enhance operational safety. This avoids unnecessary losses caused by external personnel opening and leaking the originally closed gate valve due to misoperation in situations where high-temperature fluids need to be handled. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

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

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

[0021] Figure 3 This is a schematic diagram of the structure of a high temperature resistant sealing ring of the utility model;

[0022] Figure 4 This is a schematic diagram of the valve plate structure of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the outer rotating sleeve of the utility model.

[0024] Description of reference numerals:

[0025] 1. Gate valve body; 2. Main valve seat; 3. Mounting flange; 4. Embedded groove; 5. Threaded hole; 6. High temperature resistant protective layer; 7. Valve inner ring; 8. Fastening bolts; 9. High temperature resistant sealing ring; 10. Valve plate; 11. Front plug plate; 12. Threaded screw; 13. Fixing bolts; 14. Upper valve seat; 15. Inner movable groove; 16. Internal threaded sleeve; 17. Hexagonal screw; 18. External rotating sleeve; 19. Handwheel. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The utility model provides Figure 1-5 A high temperature resistant gate valve shown includes a gate valve body 1, which is a main body for carrying a medium to flow;

[0028] The main valve seat 2 is arranged above the gate valve body 1 and is used to connect the gate valve body 1. A high temperature resistant protective layer 6 is pasted inside the gate valve body 1. A valve inner ring 7 is fixedly installed inside the gate valve body 1. A fastening bolt 8 penetrates the outside of the valve inner ring 7. One end of the fastening bolt 8 is movably connected to a high temperature resistant sealing ring 9.

[0029] The valve plate 10 is arranged on one side of the valve inner ring 7, and is used to open and close the gate valve up and down, and a front plug plate 11 is fixedly installed on one side of the valve plate 10, a threaded screw 12 passes through the top of the valve plate 10, and a fixing bolt 13 passes through the top of the main valve seat 2, one end of the fixing bolt 13 is movably connected to an upper valve seat 14, an inner movable groove 15 is provided inside the upper valve seat 14, and an internal threaded sleeve 16 is movably connected inside the inner movable groove 15. When the valve plate 10 closes the gate valve up and down, the front plug plate 11 will contact the high-temperature resistant sealing ring 9, blocking the valve inner ring 7 from front to back, and then cooperate with the valve plate 10 that was originally lowered and closed to allow the front plug plate 11 to close the valve inner ring 7, and the valve plate 10 closes the gate valve body 1, thereby forming a double closure, which greatly enhances the sealing of the gate valve in a high temperature environment.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, a mounting flange 3 is fixedly installed on the outside of the gate valve body 1, an embedded groove 4 is provided inside the mounting flange 3, and a threaded hole 5 is provided outside the mounting flange 3. The mounting flange 3 and the threaded hole 5 facilitate the docking installation of the gate valve with the external pipeline. The high-temperature resistant protective layer 6 fits tightly with the gate valve body 1. The material of the high-temperature resistant protective layer 6 is: high-entropy alloy. The high-temperature resistant protective layer 6 bonded inside the gate valve body 1 enhances the high-temperature resistance of the gate valve itself, reduces the loss of the gate valve caused by the high-temperature fluid, and improves the strength, rigidity and high-temperature resistance of the gate valve itself.

[0031] like Figure 1 , Figure 4 and Figure 5 As shown, the high temperature resistant sealing ring 9 is threadedly connected with the valve inner ring 7, the valve inner ring 7 is symmetrically arranged on the central axis of the gate valve body 1, and the valve inner ring 7 and the high temperature resistant sealing ring 9 are arranged on both sides of the gate valve body 1. In this way, when the valve plate 10 closes the gate valve up and down, the front plug plate 11 will contact with the high temperature resistant sealing ring 9, first blocking the valve inner ring 7 from front to back, and then cooperating with the valve plate 10 that originally descends and closes to complete the double closure. The upper valve seat 14 is threadedly connected with the main valve seat 2, and the internal threaded sleeve 16 is movably connected with the upper valve seat 14. The structure of the upper valve seat 14 is simple and the operation is simple. In addition, if a fault occurs, it is convenient for maintenance personnel to carry out maintenance in time without delaying the normal use of the device. A hexagonal screw 17 is fixedly installed on the top of the internal threaded sleeve 16, and an external rotating sleeve 18 is arranged on the outside of the hexagonal screw 17. A hand wheel 19 is fixedly installed on the top of the external rotating sleeve 18. After closing the gate valve, the external rotating sleeve 18 and the hand wheel 19 can be directly removed to enhance operational safety. This avoids unnecessary losses caused by external personnel opening and leaking the originally closed gate valve due to misoperation in situations where high-temperature fluids need to be handled.

[0032] The working principle of the utility model is as follows: first, when using the gate valve in high-temperature fluid occasions, first take out the gate valve body 1 and place the sealing ring in the embedded groove 4 of the mounting flange 3, and then connect the gate valve to the external pipeline through the mounting flange 3 and the threaded hole 5. After the installation is completed, the gate valve can be opened and closed to allow the high-temperature fluid to circulate. The outer rotating sleeve 18 and the hand wheel 19 can be directly sleeved on the hexagonal screw 17, and the rotation of the hexagonal screw 17 can be driven to make the internal threaded sleeve 16 rotate synchronously inside the inner movable groove 15. Then, as the internal threaded sleeve 16 rotates, the affected threaded screw rod 12 is lifted up inside the internal threaded sleeve 16, driving the valve plate 10 to lift up and down to complete the opening and closing operation. This operation is simple and fast. At the same time, after closing the gate valve, the outer rotating sleeve 18 and the hand wheel 19 can be directly removed to enhance the safety of operation, thus avoiding unnecessary loss caused by the opening leakage of the originally closed gate valve due to misoperation by external personnel in occasions where high-temperature fluid needs to be handled. Then, when the high-temperature fluid is circulating, the gate valve body 1 is attached to the inside of the gate valve body 1. The combined high-temperature resistant protective layer 6 enhances the high-temperature resistance of the gate valve itself, reduces the loss of the gate valve caused by the high-temperature fluid, and improves the strength, rigidity and high-temperature resistance of the gate valve itself. Then, a valve inner ring 7 and a high-temperature resistant sealing ring 9 are arranged on both sides of the inner part of the gate valve body 1. In this way, when the valve plate 10 closes the gate valve up and down, the front plug plate 11 will contact the high-temperature resistant sealing ring 9, first blocking the valve inner ring 7 from front to back, and then cooperating with the valve plate 10 that was originally lowered and closed, so that the front plug plate 11 closes the valve inner ring 7, and the valve plate 10 closes the gate valve body 1. The double closure thus formed greatly enhances the sealing of the gate valve in a high temperature environment, which also reduces the loss of the valve plate 10 caused by the high temperature fluid, and reduces the probability of leakage of the originally closed and sealed gate valve. After completing the opening and closing operations of the gate valve, the outer rotating sleeve 18 and the hand wheel 19 can be removed. Finally, after completing the installation and use of all gate valves according to the above operations, the device can be maintained daily. The material of the high temperature resistant protective layer 6 is: high entropy alloy, and the use process of the high temperature resistant gate valve is completed.

[0033] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high temperature resistant gate valve, characterized in that: include The gate valve body (1) is a main body for carrying the medium to flow; The main valve seat (2) is arranged above the gate valve body (1) and is used to connect the gate valve body (1). A high temperature resistant protective layer (6) is adhered to the inside of the gate valve body (1). A valve inner ring (7) is fixedly installed inside the gate valve body (1). A fastening bolt (8) penetrates the outside of the valve inner ring (7). One end of the fastening bolt (8) is movably connected to a high temperature resistant sealing ring (9). The valve plate (10) is arranged on one side of the valve inner ring (7) and is used to open and close the gate valve up and down, and a front plug plate (11) is fixedly installed on one side of the valve plate (10), a threaded screw (12) passes through the top of the valve plate (10), a fixing bolt (13) passes through the top of the main valve seat (2), one end of the fixing bolt (13) is movably connected to the upper valve seat (14), an inner movable groove (15) is opened inside the upper valve seat (14), and an inner threaded sleeve (16) is movably connected inside the inner movable groove (15).

2. A high temperature resistant gate valve according to claim 1, characterized in that: A mounting flange (3) is fixedly mounted on the outside of the gate valve body (1), an embedded groove (4) is provided inside the mounting flange (3), and a threaded hole (5) is provided on the outside of the mounting flange (3).

3. A high temperature resistant gate valve according to claim 1, characterized in that: The high temperature resistant protective layer (6) is tightly fitted to the gate valve body (1), and the material of the high temperature resistant protective layer (6) is: high entropy alloy.

4. A high temperature resistant gate valve according to claim 1, characterized in that: The high temperature resistant sealing ring (9) is threadedly connected to the valve inner ring (7), and the valve inner ring (7) is symmetrically arranged with respect to the center axis of the gate valve body (1).

5. A high temperature resistant gate valve according to claim 1, characterized in that: The upper valve seat (14) is threadedly connected to the main valve seat (2), and the internal thread sleeve (16) is movably connected to the upper valve seat (14).

6. A high temperature resistant gate valve according to claim 1, characterized in that: A hexagonal screw (17) is fixedly mounted on the top of the internal threaded sleeve (16), an external rotating sleeve (18) is arranged outside the hexagonal screw (17), and a hand wheel (19) is fixedly mounted on the top of the external rotating sleeve (18).

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