Power station gate valve device with double sealing

Abstract

The utility model relates to the technical field of power station gate valves, and discloses a power station gate valve device with double seals, which comprises a valve body, a valve seat is arranged at the top of the valve body, a valve rod is rotatably connected to the inner wall of the valve seat, a gate plate is rotatably connected to the bottom end of the valve rod, and first sliding blocks are fixedly connected to the front side and the rear side of the outer wall of the gate plate. Guide rails are fixedly connected to the front side and the rear side of the inner wall of the valve body, the first sliding blocks are slidably connected with the guide rails, a filling box is installed on the upper middle portion of the inner wall of the valve seat, first fixing rings are fixedly connected to the left side and the right side of the inner wall of the valve body, and a plurality of first springs are fixedly connected to the adjacent sides of the outer walls of the two first fixing rings at equal intervals. According to the gate valve, when the gate plate is closed, the spring pushes the sealing gasket to be tightly attached to the gate plate to form first sealing to prevent leakage, the sealing ring on the second fixing ring is matched with an external connecting part to form second sealing, sealing failure cannot be caused through the two layers of sealing, and the risk of medium leakage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of power plant gate valve technology, and in particular to a power plant gate valve device with double sealing. Background Technology

[0002] Power plant gate valves are gate valves installed in power plant systems to control the flow of media in pipelines. They are mainly used in the steam, water and oil pipeline systems of power plants. For example, in nuclear power plants, they are used in related coolant pipelines and steam pipelines, playing an important role in ensuring the safe and stable operation of the power plant system.

[0003] The main function of a power plant gate valve is to control the flow of media in the power plant pipeline. A sealed power plant gate valve device ensures that when the valve is closed, it can effectively prevent media leakage and achieve a reliable shut-off function; when the valve is open, it can ensure smooth flow of media and reduce unnecessary leakage losses.

[0004] Commercially available sealed power plant gate valve devices embed or coat non-metallic materials, such as rubber and polytetrafluoroethylene, on the gate or valve seat. These non-metallic materials have good elasticity and flexibility, which can compensate for minor defects in the sealing surface to a certain extent, thereby achieving a reliable seal. However, long-term erosion will wear down the sealing surface of the gate valve. For example, in the case of gate valves in coal pulverized pipelines of thermal power plants, dusty airflow can easily damage the sealing surface, reduce sealing performance, and cause leakage. The existing technology is to select sealing materials with good corrosion resistance or to perform surface anti-corrosion treatment on the sealing materials. However, the single-layer sealing structure relies on only a single sealing surface or sealing element to achieve a seal, which can easily lead to seal failure and a high risk of media leakage. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a power station gate valve device with double sealing, which aims to improve the problem that single-layer sealing in the prior art is prone to sealing failure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a power station gate valve device with double sealing, comprising a valve body, a valve seat at the top of the valve body, a valve stem rotatably connected to the inner wall of the valve seat, a gate plate rotatably connected to the bottom end of the valve stem, a slider one fixedly connected to the front and rear sides of the outer wall of the gate plate, a guide rail fixedly connected to the front and rear sides of the inner wall of the valve body, the slider one slidingly connected to the guide rail, a filling box installed in the upper middle part of the inner wall of the valve seat, a fixing ring one fixedly connected to the left and right sides of the inner wall of the valve body, multiple springs one fixedly fixedly connected at equal intervals on the adjacent sides of the outer walls of the two fixing rings one, a sealing gasket fixedly connected to the end of each of the multiple springs one, a connecting ring fixedly connected to the left and right sides of the outer wall of the valve body, a fixing ring two fixedly connected to the opposite side of the outer walls of the two connecting rings, a sealing ring installed around the outer wall of the fixing ring two, and a fixing mechanism provided at the top of the valve seat, the fixing mechanism being used to fix the valve stem to prevent upward movement that could lead to sealing failure.

[0007] As a further description of the above technical solution:

[0008] The fixing mechanism includes a locking block, which is fixedly connected to the upper middle part of the outer wall of the valve stem. Fixing blocks are fixedly connected to the upper middle parts of both the front and rear sides of the outer wall of the valve seat. Limiting blocks are fixedly connected to the opposite side of the top walls of the two fixing blocks. A locking block is slidably connected to the front side of the outer wall of the limiting block. The locking block engages with the locking block. A second spring is installed on the outer wall of the locking block. A second slider is fixedly connected to the bottom wall of the locking block. Slide rails are fixedly connected to both the front and rear sides of the top wall of the valve seat. The second slider is slidably connected to the slide rails.

[0009] As a further description of the above technical solution:

[0010] A rotating handle is fixedly connected to the top of the valve stem.

[0011] As a further description of the above technical solution:

[0012] The valve seat and the top wall of the valve body are both threaded with bolts, and the lower part of the outer wall of the bolts is threaded with nuts.

[0013] As a further description of the above technical solution:

[0014] Rubber rings are installed on the outer walls of the two locking blocks on opposite sides.

[0015] As a further description of the above technical solution:

[0016] Flanges are fixedly connected to both the left and right sides of the outer wall of the valve body.

[0017] As a further description of the above technical solution:

[0018] Multiple mounting holes are equally spaced on the left and right sides of the outer walls of both flanges.

[0019] As a further description of the above technical solution:

[0020] The bottom wall of the valve body is fixedly connected to brackets on both the left and right sides.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, when the gate is lowered and closed, the spring pushes the sealing gasket to press tightly against the gate, forming the first seal to prevent leakage. At the same time, the sealing ring on the second fixing ring cooperates with the external connecting parts to form the second seal, further enhancing the sealing performance of the gate valve. The two-layer sealing structure will not lead to sealing failure and reduces the risk of medium leakage.

[0023] 2. In this utility model, when the valve stem descends, it drives the locking block to move down. The locking block pushes the locking block to overcome the elastic force of the second spring and slides along the limit block to both sides. The second slider is guided and supported on the slide rail. When the bottom wall of the locking block moves to the top wall of the locking block, the elastic force of the second spring makes the two lock together. The locking block prevents the valve stem from moving up and fixes the closed gate valve. Attached Figure Description

[0024] Figure 1 This is a perspective view of a power station gate valve device with double sealing proposed in this utility model;

[0025] Figure 2 This is a right view of a power station gate valve device with double sealing proposed in this utility model;

[0026] Figure 3 This is a partial exploded view of a power station gate valve device with double sealing proposed in this utility model;

[0027] Figure 4 This is a partial structural exploded view of a power station gate valve device with double sealing proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the fixing structure of a power station gate valve device with double sealing proposed in this utility model.

[0029] Legend:

[0030] 1. Valve body; 2. Fixing mechanism; 201. Clamping block; 202. Fixing block; 203. Limiting block; 204. Locking block; 205. Spring II; 206. Slider II; 207. Slide rail; 3. Valve seat; 4. Valve stem; 5. Gate; 6. Slider I; 7. Guide rail; 8. Filler box; 9. Fixing ring I; 10. Spring I; 11. Sealing gasket; 12. Connecting ring; 13. Fixing ring II; 14. Sealing ring; 15. Rotary handle; 16. Bolt; 17. Nut; 18. Rubber ring; 19. Flange; 20. Mounting hole; 21. Bracket. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a power station gate valve device with double sealing, comprising a valve body 1, a valve seat 3 at the top of the valve body 1, a valve stem 4 rotatably connected to the inner wall of the valve seat 3, a gate plate 5 rotatably connected to the bottom end of the valve stem 4, sliders 6 fixedly connected to the front and rear sides of the outer wall of the gate plate 5, and guide rails 7 fixedly connected to the front and rear sides of the inner wall of the valve body 1. Sliding sliders 6 and guide rails 7 are slidably connected. Rotation of the valve stem 4 drives the gate plate 5 to move vertically up and down along the guide rails 7 within the valve body 1, thereby realizing the opening and closing of the gate valve. A filling box 8 is installed in the upper middle part. The filling box 8 prevents the medium from leaking upward along the gap between the valve stem 4 and the valve seat 3, and plays an auxiliary sealing role to ensure the sealing performance of the entire gate valve device. Fixing rings 9 are fixedly connected to the left and right sides of the inner wall of the valve body 1. Multiple springs 10 are fixedly connected at equal intervals to adjacent sides of the outer walls of the two fixing rings 9. The fixing rings 9 are used to fix the position of the springs 10. Sealing gaskets 11 are fixedly connected to the ends of the multiple springs 10. The elastic force provided by the springs 10 ensures a tight contact between the sealing gaskets 11 and the gate 5. This creates a first seal between the gate 5 and the valve body 1. Connecting rings 12 are fixedly connected to both the left and right sides of the outer wall of the valve body 1. Two fixing rings 13 are fixedly connected to the outer walls of the two connecting rings 12 on opposite sides. Sealing rings 14 are installed around the outer walls of the fixing rings 13. When the valve is closed, the sealing rings 14 will tightly engage with the external connecting parts to form a second seal. A fixing mechanism 2 is provided on the top of the valve seat 3. The fixing mechanism 2 is used to fix the valve stem 4 to prevent upward movement that could lead to seal failure. A handle 15 is fixedly connected to the top of the valve. The handle 15 is used to easily drive the valve stem 4 to rotate, thereby controlling the rise and fall of the gate 5 to realize the opening and closing operation of the gate valve. The valve seat 3 and the top wall of the valve body 1 are threaded with bolts 16. The lower part of the outer wall of the bolt 16 is threaded with a nut 17. The bolt 16 is inserted into the corresponding hole of the valve seat 3 and the valve body 1, and then the nut 17 is used to thread and tighten the lower part of the outer wall of the bolt 16 to ensure the sealing and stability of the gate valve device and prevent leakage or loosening of parts due to loose connection.

[0033] Specifically, by rotating the valve stem 4, since the valve stem 4 is rotatably connected to the gate 5, and the slider 6 on the outer wall of the gate 5 is slidably connected to the guide rail 7 on the inner wall of the valve body 1, the rotation of the valve stem 4 will drive the gate 5 to move up and down linearly along the guide rail 7 within the valve body 1, thereby realizing the opening and closing of the gate valve. When the gate 5 descends to the closed position, the spring 10 on the fixing ring 9 on both sides inside the valve body 1 will push the sealing gasket 11 to press tightly against the gate 5. The elastic force provided by the spring 10 makes the sealing gasket 11 and the gate 5 form a tight contact, thereby forming the first seal between the gate 5 and the valve body 1, preventing the medium from leaking from the gap between the gate 5 and the valve body 1. On the left and right sides of the valve body 1, the connecting ring 12 is fixedly connected to the fixing ring 13. The sealing rings 14 installed around the outer wall of the fixed ring 13 will fit tightly with the external connecting parts when the valve is closed, forming a second seal to prevent the medium from leaking from the valve body 1 and the external connecting parts, further improving the sealing performance of the gate valve. The top of the valve seat 3 is provided with a fixing mechanism 2, which is used to fix the valve stem 4 to prevent it from moving upward and causing the seal to fail. The handle 15 is used to easily drive the valve stem 4 to rotate, thereby controlling the raising and lowering of the gate plate 5 to realize the opening and closing operation of the gate valve. The bolt 16 is inserted into the corresponding hole of the valve seat 3 and the valve body 1, and then the nut 17 is used to thread and tighten the bolt 16 in the lower part of the outer wall of the bolt 16 to ensure the sealing and stability of the gate valve device and prevent leakage or loosening of parts due to loose connection.

[0034] Reference Figure 1 and Figure 5 The fixing mechanism 2 includes a locking block 201, which is fixedly connected to the upper middle part of the outer wall of the valve stem 4. Fixing blocks 202 are fixedly connected to the upper middle parts of the front and rear sides of the outer wall of the valve seat 3. Limiting blocks 203 are fixedly connected to the opposite side of the top walls of the two fixing blocks 202. A locking block 204 is slidably connected to the front side of the outer wall of the limiting block 203. The limiting block 203 restricts the sliding range of the locking block 204, ensuring that the locking block 204 moves along a predetermined path. The locking block 204 engages with the locking block 201, and is used to fix the locking block 201. A second spring 205 is installed on the outer wall of the locking block 204, which is used to rebound the locking block 204. A second slider 206 is fixedly connected to the bottom wall of the locking block 204. Slide rails 207 are fixedly connected to the front and rear sides of the top wall of the valve seat 3. The second slider 206 is slidably connected to the slide rails 207, and slides on the slide rails 207 to lock the block 204. The movement is guided and supported. Rubber rings 18 are installed on the outer walls of the two locking blocks 204 on opposite sides. The rubber rings 18 are used to reduce the pressure concentration point between the hand and the handle, relieve fatigue and discomfort caused to the hand by holding the handle for a long time, and improve the comfort of operation.

[0035] Specifically, when the valve stem 4 descends, the valve stem 4 drives the locking block 201 to move downward. The locking block 201 pushes the locking block 204, causing it to overcome the elastic force of the second spring 205 and slide along the limit block 203 to both sides. At the same time, the second slider 206 slides on the slide rail 207, providing guidance and support for the movement of the locking block 204. When the bottom wall of the locking block 204 moves to the top wall of the locking block 201, the elastic force of the second spring 205 pushes the locking block 204 to engage with the locking block 201. The locking block 204 prevents the valve stem 4 from moving upward, thereby fixing the closed gate valve. The rubber ring 18 is used to reduce the pressure concentration point between the hand and the handle, alleviate the fatigue and discomfort caused to the hand by holding the handle for a long time, and improve the comfort of operation.

[0036] Reference Figure 1 and Figure 2 Flanges 19 are fixedly connected to the left and right sides of the outer wall of the valve body 1. The flanges 19 are used to connect the pipeline to ensure the smooth flow of the medium in the pipeline system, and at the same time ensure that the connection has good sealing and strength. Multiple mounting holes 20 are opened at equal intervals on the left and right sides of the outer wall of the two flanges 19. The mounting holes 20 are used to connect the flanges 19 with the connector. Brackets 21 are fixedly connected to the left and right sides of the bottom wall of the valve body 1. The brackets 21 are used to support the valve body 1.

[0037] Specifically, flange 19 is used to connect pipes to ensure smooth flow of the medium in the pipeline system, while ensuring good sealing and strength at the connection. Mounting hole 20 is used to connect flanges 19 with connectors. Bracket 21 is used to support valve body 1 and stabilize valve body 1.

[0038] Working principle: When the gate 5 descends to the closed position, the springs 10 on the fixing rings 9 on both sides inside the valve body 1 will push the sealing gasket 11 to press tightly against the gate 5. The elastic force provided by the springs 10 makes the sealing gasket 11 and the gate 5 make tight contact, thus forming the first seal between the gate 5 and the valve body 1, preventing the medium from leaking from the gap between the gate 5 and the valve body 1. On the left and right sides of the valve body 1, the connecting rings 12 are fixedly connected to the fixing rings 13. The sealing rings 14 installed around the outer wall of the fixing rings 13 will fit tightly with the external connecting parts when the valve is closed, forming the second seal, preventing the medium from leaking from the valve body 1 and the external connecting parts, and further improving the sealing performance of the gate valve.

[0039] When the valve stem 4 descends, it causes the locking block 201 to move downward. The locking block 201 pushes the locking block 204, causing it to overcome the elastic force of the second spring 205 and slide along the limit block 203 to both sides. At the same time, the second slider 206 slides on the slide rail 207, providing guidance and support for the movement of the locking block 204. When the bottom wall of the locking block 204 moves to the top wall of the locking block 201, the elastic force of the second spring 205 pushes the locking block 204 to engage with the locking block 201. The locking block 204 prevents the valve stem 4 from moving upward, thereby fixing the closed gate valve.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power station gate valve arrangement with double sealing, comprising a valve body (1), characterized in that: The top of the valve body (1) is provided with a valve seat (3), the inner wall of the valve seat (3) is rotatably connected with a valve rod (4), the bottom end of the valve rod (4) is rotatably connected with a gate (5), the outer wall of the gate (5) is fixedly connected with a sliding block one (6) on the front and rear sides, the inner wall of the valve body (1) is fixedly connected with a guide rail (7) on the front and rear sides, the sliding block one (6) is slidably connected with the guide rail (7), the inner wall of the valve seat (3) is installed with a filling function (8) in the upper middle part, the inner wall of the valve body (1) is fixedly connected with a fixed ring one (9) on the left and right sides, a plurality of spring ones (10) are fixedly connected with the outer wall of the adjacent side of the two fixed ring ones (9) at equal intervals, the distal end of the plurality of spring ones (10) is fixedly connected with a sealing pad (11), the outer wall of the valve body (1) is fixedly connected with a connecting ring (12) on the left and right sides, the outer wall of the two connecting rings (12) is fixedly connected with a fixed ring two (13) on the side away from each other, the outer wall of the fixed ring two (13) is installed with a sealing ring (14) around, the top of the valve seat (3) is provided with a fixing mechanism (2), the fixing mechanism (2) is used for fixing the valve rod (4) to prevent upward movement and cause sealing failure.

2. A power plant gate valve assembly having a double seal as claimed in claim 1 wherein: The fixing mechanism (2) comprises a clamping block (201), the clamping block (201) is fixedly connected to the outer wall of the valve rod (4) in the upper middle part, the outer wall of the valve seat (3) is fixedly connected with a fixed block (202) in the upper middle part on the front and rear sides, the top wall of the two fixed blocks (202) is fixedly connected with a limiting block (203) on the side away from each other, the outer wall of the limiting block (203) is slidably connected with a locking block (204) on the front side, the locking block (204) is engaged with the clamping block (201), the outer wall of the locking block (204) is installed with a spring two (205), the bottom wall of the locking block (204) is fixedly connected with a sliding block two (206), the top wall of the valve seat (3) is fixedly connected with a sliding rail (207) on the front and rear sides, the sliding block two (206) is slidably connected with the sliding rail (207).

3. A power plant gate valve assembly having a double seal as defined in claim 1, wherein: The top end of the valve rod (4) is fixedly connected with a handle (15).

4. A power plant gate valve assembly having a double seal as defined in claim 1, wherein: The top wall of the valve seat (3) and the valve body (1) is threadedly connected with a bolt (16) around, the outer wall of the bolt (16) is threadedly connected with a nut (17) in the lower middle part.

5. A power plant gate valve assembly having a double seal as defined in claim 2, wherein: The outer wall of the two locking blocks (204) is installed with a rubber ring (18) on the side away from each other.

6. A power plant gate valve assembly having a double seal as defined in claim 1, wherein: The outer wall of the valve body (1) is fixedly connected with a flange (19) on the left and right sides.

7. A power plant gate valve assembly having a double seal as claimed in claim 6, characterised in that: A plurality of mounting holes (20) are formed on the outer wall of the two flanges (19) on the left and right sides at equal intervals.

8. A power plant gate valve assembly having a double seal as defined in claim 1, wherein: The bottom wall of the valve body (1) is fixedly connected with a support (21) on the left and right sides.

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