Metal hard sealing ball valve seat

Abstract

The utility model discloses a metal hard sealing ball valve seat, and relates to the field of ball valves. The metal hard sealing ball valve seat comprises a valve seat unit and a valve body arranged on the outer side of the valve seat unit, the valve seat unit comprises a valve seat body, a movable ring, a sealing ring and an air pressure adjusting assembly, the valve seat body is embedded in the inner wall of the valve body, the movable ring is arranged in the valve seat body in a sliding mode, the sealing ring is fixedly connected to one side of the movable ring, and the air pressure adjusting assembly is arranged in the valve seat body. The other side of the sealing ring extends outwards, the air pressure adjusting assembly is arranged in the valve seat body, and the air pressure adjusting assembly adjusts the position of the movable ring through air pressure. After the metal hard sealing ball valve seat is used for a long time, the contact face of the sealing ring and the ball valve is abraded, at the moment, the position of the movable ring is adjusted through the air pressure adjusting assembly under the action of air pressure, and when the movable ring moves towards the ball valve element, the sealing ring is driven to tightly abut against the ball valve element in the valve body again; therefore, the situation of water leakage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically to a metal hard-seal ball valve seat. Background Technology

[0002] Ball valves are characterized by low fluid resistance, smooth fluid flow, rapid opening and closing, and easy automation control. Conventional ball valves are limited by the valve seat sealing material and cannot be used in high-temperature conditions. Metal hard-seal ball valves are especially suitable for harsh conditions such as media containing solid particles, slurries, coal powder, and ash.

[0003] The sealing of a ball valve is achieved by a pre-tightening force between the ball and the valve seat, plus the force exerted by the fluid pressure on the sealing surface of the valve seat. Generally, the pre-tightening force of a ball valve is achieved by placing an elastic element between the valve seat and the valve body. This results in a large frictional force between the valve seat and the ball. Although this provides a good sealing effect, it can easily cause wear on the valve seat. After long-term use, a gap may be worn into the inner ring of the valve seat, which may lead to water leakage between the valve seat and the ball. In this case, it is inconvenient to repair the valve seat, and it can only be disassembled and replaced. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a metal hard-seal ball valve seat, which solves the problem that although there is a large friction between the valve seat and the ball, it can easily cause wear on the valve seat, resulting in a gap being worn out on the inner ring of the valve seat after long-term use. This can lead to water leakage between the valve seat and the ball, making it inconvenient to repair the valve seat and requiring it to be disassembled and replaced.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a metal hard-seal ball valve seat, comprising a seat unit and a valve body disposed outside the seat unit, wherein the seat unit comprises:

[0006] The valve seat body is embedded in the inner wall of the valve body;

[0007] The movable ring is slidably disposed inside the valve seat body;

[0008] A sealing ring is fixedly connected to one side of the movable ring, and the other side of the sealing ring extends outward;

[0009] A pneumatic pressure regulating component is disposed inside the valve seat body, and the pneumatic pressure regulating component uses pneumatic pressure to regulate the position of the movable ring.

[0010] Preferably, the pressure regulating component includes:

[0011] A cavity, which is formed inside the valve seat body;

[0012] Piston rings, which are slidably disposed inside the cavity and fixedly connected to the movable ring;

[0013] The gas passage is located between the valve body and the valve seat body, and is connected to the cavity.

[0014] Preferably, the sealing ring has an inclined surface on the outer side.

[0015] Preferably, an elastic element is fixedly connected between the side of the piston ring near the movable ring and the inner wall of the cavity.

[0016] Preferably, an air injection nozzle is provided on the outer side of the valve body, and the air injection nozzle is connected to the gas passage.

[0017] Preferably, the sealing ring is made of a hard metal material.

[0018] Preferably, the valve body has an embedded groove inside, and the valve seat body is embedded in the embedded groove.

[0019] This utility model discloses a metal hard-seal ball valve seat, which has the following beneficial effects: During use, the metal hard-seal ball valve seat utilizes a sealing ring to achieve a sealing effect when it abuts against the ball valve core installed inside the valve body. After long-term use, wear occurs on the contact surface between the sealing ring and the ball valve. At this time, the position of the movable ring is adjusted by using a pneumatic pressure regulating component under the action of pneumatic pressure. When the movable ring moves towards the ball valve core, it drives the sealing ring to re-abut tightly against the ball valve core inside the valve body, thereby preventing water leakage. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This utility model Figure 1 Enlarged diagram of part A in the image.

[0023] In the diagram: 1. Valve seat unit; 11. Valve seat body; 12. Moving ring; 13. Sealing ring; 131. Inclined surface; 14. Air pressure regulating component; 141. Cavity; 142. Piston ring; 143. Gas passage; 144. Elastic element; 145. Air injection nozzle; 2. Valve body; 21. Embedded groove; 22. Channel. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This application provides a metal hard-seal ball valve seat, which solves the problem that although there is a large friction between the valve seat and the ball, it can easily cause wear to the valve seat, resulting in a gap on the inner ring of the valve seat after long-term use. This can lead to water leakage between the valve seat and the ball, making it inconvenient to repair the valve seat and requiring it to be disassembled and replaced.

[0026] In the event that the contact surface between the sealing ring 13 and the ball valve wears down after long-term use, the position of the movable ring 12 is adjusted by the air pressure regulating component 14 under the action of air pressure. When the movable ring 12 moves toward the ball valve core, it drives the sealing ring 13 to re-close tightly against the ball valve core inside the valve body 2, thereby preventing water leakage.

[0027] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0028] Example 1

[0029] This utility model discloses a metal hard-seal ball valve seat.

[0030] According to the appendix Figure 1-2 As shown, the device includes a valve seat unit 1 and a valve body 2 disposed outside the valve seat unit 1. The valve seat unit 1 includes:

[0031] The valve seat body 11 is embedded in the inner wall of the valve body 2;

[0032] The movable ring 12 is slidably disposed inside the valve seat body 11;

[0033] A sealing ring 13 is fixedly connected to one side of the movable ring 12, and the other side of the sealing ring 13 extends outward.

[0034] The air pressure regulating component 14 is located inside the valve seat body 11. The air pressure regulating component 14 uses air pressure to regulate the position of the movable ring 12.

[0035] During use, the sealing ring 13 provides a seal when it comes into contact with the ball valve core inside the valve body 2. After long-term use, wear occurs on the contact surface between the sealing ring 13 and the ball valve. At this time, the position of the movable ring 12 is adjusted by the air pressure regulating component 14 under the action of air pressure. When the movable ring 12 moves toward the ball valve core, it drives the sealing ring 13 to re-close tightly against the ball valve core inside the valve body 2, thereby preventing water leakage.

[0036] Specifically disclosed, the air pressure regulating assembly 14 includes:

[0037] Cavity 141 is formed inside valve seat body 11;

[0038] Piston ring 142, which is slidably disposed inside cavity 141 and fixedly connected to movable ring 12;

[0039] Gas passage 143 is located between valve body 2 and valve seat body 11, and gas passage 143 is connected to cavity 141.

[0040] By using the gas channel 143, when air is injected into the gas channel 143 by an external air injection device, air can enter the cavity 141, thereby pushing the piston ring 142 to slide inside the cavity 141, and thus pushing the movable ring 12 to move accordingly.

[0041] Furthermore, the sealing ring 13 has an inclined surface 131 on the outer side.

[0042] Example 2

[0043] This utility model discloses a metal hard-seal ball valve seat.

[0044] According to the appendix Figure 1-2 As shown, the device includes a valve seat unit 1 and a valve body 2 disposed outside the valve seat unit 1. The valve seat unit 1 includes:

[0045] The valve seat body 11 is embedded in the inner wall of the valve body 2;

[0046] The movable ring 12 is slidably disposed inside the valve seat body 11;

[0047] A sealing ring 13 is fixedly connected to one side of the movable ring 12, and the other side of the sealing ring 13 extends outward.

[0048] The air pressure regulating component 14 is located inside the valve seat body 11. The air pressure regulating component 14 uses air pressure to regulate the position of the movable ring 12.

[0049] Specifically disclosed, the air pressure regulating assembly 14 includes:

[0050] Cavity 141 is formed inside valve seat body 11;

[0051] Piston ring 142, which is slidably disposed inside cavity 141 and fixedly connected to movable ring 12;

[0052] Gas passage 143 is located between valve body 2 and valve seat body 11, and gas passage 143 is connected to cavity 141.

[0053] Furthermore, an elastic element 144 is fixedly connected between the side of the piston ring 142 near the movable ring 12 and the inner wall of the cavity 141.

[0054] Specifically disclosed, an air injection nozzle 145 is provided on the outer side of the valve body 2, and the air injection nozzle 145 is connected to the gas passage 143.

[0055] Furthermore, the sealing ring 13 is made of hard metal material.

[0056] The valve body 2 has an embedded groove 21 inside, and the valve seat body 11 is embedded in the embedded groove 21.

[0057] A channel 22 is opened inside the valve body 2.

[0058] The elastic element 144 provided between the inner walls of the cavity 141 of the piston ring 142 can be used to position the piston ring 142, preventing the piston ring 142 from moving randomly. Thus, the piston ring 142 can only be moved when the internal air pressure of the cavity 141 increases. At the same time, the provided air injection nozzle 145 can be used to conveniently inject gas into the gas passage 143 to increase the internal air pressure of the cavity 141.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A metal hard-seated ball valve seat comprising a seat unit (1) and a body (2) arranged outside the seat unit (1), characterized in that, The valve seat unit (1) comprises: a valve seat body (11) embedded on the inner wall of the valve body (2); a movable ring (12) slidingly arranged inside the valve seat body (11); a sealing ring (13) fixedly connected to one side of the movable ring (12), and the other side of the sealing ring (13) extends outward; a gas pressure adjusting assembly (14) arranged inside the valve seat body (11), which adjusts the position of the movable ring (12) by adjusting the gas pressure.

2. A metal hard-seal ball valve seat according to claim 1, characterized in that The gas pressure adjusting assembly (14) comprises: a cavity (141) formed in the valve seat body (11); a piston ring (142) slidingly arranged inside the cavity (141) and fixedly connected to the movable ring (12); a gas passage (143) formed between the valve body (2) and the valve seat body (11), and the gas passage (143) is in communication with the cavity (141).

3. A metal hard-seal ball valve seat according to claim 2, wherein An inclined surface (131) is formed on the side of the sealing ring (13) exposed to the outside.

4. A metal hard-seal ball valve seat according to claim 2, wherein An elastic member (144) is fixedly connected between the side of the piston ring (142) close to the movable ring (12) and the inner wall of the cavity (141).

5. A metal hard-seal ball valve seat according to claim 2, wherein A gas injection nozzle (145) is arranged on the outer side of the valve body (2), and the gas injection nozzle (145) is in communication with the gas passage (143).

6. A metal hard-seal ball valve seat according to claim 1, wherein The sealing ring (13) is made of hard metal material.

7. A metal hard-seal ball valve seat according to claim 1, wherein An embedding groove (21) is formed in the inner part of the valve body (2), and the valve seat body (11) is embedded in the embedding groove (21).

8. A metal hard-seal ball valve seat according to claim 1, wherein A passage (22) is formed in the inner part of the valve body (2).

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