Inflatable hollow sealing ring for nuclear power

Abstract

The utility model relates to the technical field of nuclear power station nuclear-grade butterfly valves, and discloses a nuclear power inflation hollow sealing ring which comprises a sealing ring body, an air tap is arranged at the top end of the sealing ring body, a middle pipe is fixedly connected to the middle of the bottom end of the air tap and is of a hollow structure, and the air tap and the middle pipe are communicated with each other and are of a T-shaped structure. Two ports of the sealing ring body are respectively inserted and communicated with the two ends of the middle pipe, the butt joint position of the two end parts of the sealing ring body is fixedly connected with the outer wall of the corresponding position of the air tap, the front end of the bottom plate is connected with a first sliding plate through a connecting assembly I, and the rear end of the bottom plate is connected with a second sliding plate through a connecting assembly II. According to the utility model, the corresponding sealing medium is added into the sealing ring through the air tap and the middle pipe, so that the air tap is convenient to open and store, the use of the sealing ring is not influenced by the air tap, and the sealing ring is arranged in a layered manner, so that the sealing ring is more corrosion-resistant, wear-resistant and radiation-resistant.

Description

Technical Field

[0001] This utility model relates to the field of nuclear-grade butterfly valves for nuclear power plants, and in particular to an air-filled hollow sealing ring for nuclear power plants. Background Technology

[0002] Hollow sealing rings for nuclear-grade butterfly valves are deformable sealing gaskets installed around the outer edge of the disc, which emerged with the development of nuclear power valves. They are devices that regulate the sealing performance of the butterfly valve by changing the pressure inside the sealing ring. The principle is to inflate the hollow part of the sealing ring with air, causing the sealing ring to expand and fill the sealing gap. In nuclear power plant equipment, such as valves, good sealing is required to prevent the leakage of radioactive materials and ensure the normal operation of the system.

[0003] A search revealed a hollow O-ring for nuclear power plant valves, publication number CN220910472U. This O-ring comprises a nozzle and a fluororubber tube. A hollow intermediate tube is centrally fixed to the lower end of the nozzle, and the nozzle and intermediate tube are interconnected and arranged in a T-shape. The two ends of the fluororubber tube are inserted into and connected to the two ends of the intermediate tube. The mating points of the two ends of the fluororubber tube are fixed to the outer wall of the corresponding position on the nozzle. The nozzle, intermediate tube, and fluororubber tube are molded and vulcanized into a single unit through inflation and pressure. This invention optimizes the connection structure between the nozzle and the fluororubber tube by providing two joint ports at the lower end of the nozzle for connection and fixation. This overcomes the problems of complex and difficult processes and rough surfaces at the connection points in existing nozzle-fluororubber tube connections, reducing operational difficulty, improving product qualification rate, providing better sealing effect, and increasing product lifespan.

[0004] Based on the aforementioned patent, the intermediate tube ensures good communication between the nozzle and the fluororubber tube, facilitating the molding and vulcanization of the two ends of the fluororubber tube with the intermediate tube and the nozzle as a single unit. This eliminates the need to drill holes in the fluororubber tube for connection and fixation with the nozzle. However, the patent does not fix the nozzle or provide a sealing ring body. To address this technical problem, this application proposes a gas-filled hollow sealing ring for nuclear power plants. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a gas-filled hollow sealing ring for nuclear power plants. This ring allows for the addition of a sealing medium to the sealing ring body via an air nozzle, and facilitates the retraction of the air nozzle. Both the air nozzle and the sealing ring possess higher corrosion resistance and other properties.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A hollow gas-filled sealing ring for nuclear power includes a sealing ring body, an air nozzle at the top of the sealing ring body, and a central tube fixedly connected to the bottom center of the air nozzle. The central tube is hollow, and the air nozzle and the central tube are interconnected and arranged in a T-shape. Two ports of the sealing ring body are respectively inserted into and connected to the two ends of the central tube, and the two ends of the sealing ring body are fixedly connected to the outer wall of the corresponding position of the air nozzle. An outer protective layer is provided on the inner wall of the sealing ring body, a buffer layer is provided on one side of the outer protective layer, a support layer is provided on one side of the buffer layer, and an inner sealing layer is provided on one side of the support layer. Further, a base plate is provided, the bottom end of which is fixedly connected to the outer wall of the top of the sealing ring body. A first sliding plate is connected to the front end of the base plate through a connecting component one, and a second sliding plate is connected to the rear end of the base plate through a connecting component two.

[0008] Furthermore, the connecting component includes a first pressure plate rotatably connected to the inner wall of the bottom end of the base plate, and the rear end of the first slide plate is fixedly connected to the top end of the first pressure plate.

[0009] Furthermore, a first inclined rod is fixedly connected to the front side of the top of the base plate, and the middle part of the first sliding plate is slidably connected to the outer wall of the first inclined rod.

[0010] Furthermore, the second connecting component includes a second pressure plate rotatably connected to the inner wall of the bottom end of the base plate, and the front end of the second sliding plate is fixedly connected to the top end of the second pressure plate.

[0011] Furthermore, a second inclined rod is fixedly connected to the rear side of the top of the base plate, and the middle part of the second sliding plate is slidably connected to the outer wall of the second inclined rod.

[0012] Furthermore, springs are fixedly connected to the bottom center of both the first and second sliding plates, and the bottom ends of the two springs are fixedly connected to the front and rear sides of the top of the base plate.

[0013] Furthermore, a through groove is provided at the top of the sealing ring body, and the size of the through groove is the same as the size of the air nozzle.

[0014] Furthermore, both the outer protective layer and the inner sealing layer are made of fluororubber, the buffer layer is made of soft plastic, and the support layer is made of fiber material.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the air nozzle and the intermediate tube can be used to add the corresponding sealing medium into the sealing ring body, thereby increasing the application range of the sealing ring and meeting various user needs. The movement of the two pressure plates facilitates the opening and closing of the air nozzle, ensuring that the air nozzle does not affect the use of the sealing ring body and improving the practicality of the sealing ring.

[0017] 2. In this utility model, by setting the sealing ring in layers, the sealing ring becomes more corrosion-resistant, wear-resistant, and radiation-resistant, which can meet the location requirements of more nuclear power plants, satisfy the user experience of more operators, and increase the practicality of the sealing ring. Attached Figure Description

[0018] Figure 1 This is a perspective view of a gas-filled hollow sealing ring for nuclear power plants proposed in this utility model;

[0019] Figure 2 This utility model provides a structural diagram of the air nozzle for a gas-filled hollow sealing ring used in nuclear power plants.

[0020] Figure 3 This utility model provides a structural diagram of the intermediate tube of an inflatable hollow sealing ring for nuclear power plants.

[0021] Figure 4 This utility model provides a structural diagram of the base plate of an inflatable hollow sealing ring for nuclear power plants.

[0022] Figure 5 This is a structural diagram of the first pressure plate of an inflatable hollow sealing ring for nuclear power plants proposed in this utility model;

[0023] Figure 6 This is a cross-sectional view of the sealing ring body of an inflatable hollow sealing ring for nuclear power plants proposed in this utility model.

[0024] Legend:

[0025] 1. Sealing ring body; 2. Air nozzle; 3. Intermediate tube; 4. Base plate; 5. First pressure plate; 6. Second pressure plate; 7. First sliding plate; 8. Second sliding plate; 9. First diagonal rod; 10. Second diagonal rod; 11. Spring; 12. Outer protective layer; 13. Buffer layer; 14. Support layer; 15. Inner sealing layer. Detailed Implementation

[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] Reference Figure 1 , Figure 4 and Figure 5An embodiment of this utility model provides: a gas-filled hollow sealing ring for nuclear power plants, comprising a base plate 4, the bottom end of which is fixedly connected to the outer wall of the top end of the sealing ring body 1; a first pressure plate 5 is rotatably connected to the inner wall of the bottom end of the base plate 4; a first sliding plate 7 is fixedly connected to the top end of the first pressure plate 5; a first inclined rod 9 is fixedly connected to the front side of the top end of the base plate 4; the middle part of the first sliding plate 7 is slidably connected to the outer wall of the first inclined rod 9; a second pressure plate 6 is slidably connected to the inner wall of the bottom end of the base plate 4; a second sliding plate 8 is fixedly connected to the top end of the second pressure plate 6; a second inclined rod 10 is fixedly connected to the rear side of the top end of the base plate 4; the middle part of the second sliding plate 8 is slidably connected to the outer wall of the second inclined rod 10; springs 11 are fixedly connected to the middle of the bottom ends of both the first sliding plate 7 and the second sliding plate 8; the bottom ends of both springs 11 are fixedly connected to the front and rear sides of the top end of the base plate 4; a through groove is opened at the top end of the sealing ring body 1, the size of which is the same as the size of the gas nozzle 2.

[0028] Specifically, the base plate 4, the first pressure plate 5, the second pressure plate 6, the first sliding plate 7, the second sliding plate 8, the first diagonal bar 9, and the second diagonal bar 10 are all made of soft rubber. The bottom end of the first pressure plate 5 is provided with a rectangular groove, and the bottom end of the second pressure plate 6 rotates in the rectangular groove. A fixing rod is fixed to the inner wall of the bottom end of the base plate 4, and both the first pressure plate 5 and the second pressure plate 6 rotate on the fixing rod.

[0029] Reference Figure 2 , Figure 3 and Figure 6 The sealing ring body 1 has an air nozzle 2 at its top and a middle tube 3 fixedly connected to the bottom center of the air nozzle 2. The middle tube 3 is a hollow structure. The air nozzle 2 and the middle tube 3 are interconnected and arranged in a T-shape. The two ends of the sealing ring body 1 are respectively inserted into and connected to the two ends of the middle tube 3. The two ends of the sealing ring body 1 are fixedly connected to the outer wall of the corresponding position of the air nozzle 2. The inner wall of the sealing ring body 1 is provided with an outer protective layer 12. A buffer layer 13 is provided on the inner side of the outer protective layer 12. A support layer 14 is provided on the inner side of the buffer layer 13. An inner sealing layer 15 is provided on the inner side of the support layer 14. The outer protective layer 12 and the inner sealing layer 15 are both made of fluororubber material, the buffer layer 13 is made of soft plastic, and the support layer 14 is made of fiber material.

[0030] Specifically, the sealing ring body 1 is a soft rubber structure, and the outer protective layer 12 is made of fluororubber. This outermost layer of the sealing ring primarily serves a protective function, directly exposed to the complex environment of the nuclear power plant, resisting various possible damages. Firstly, it possesses good corrosion resistance, able to withstand the erosion of various chemical media in the nuclear power plant. Secondly, it has a certain degree of wear resistance, because during the opening and closing of the butterfly valve, the outer layer of the sealing ring will rub against the valve seat or other components. Furthermore, it has radiation resistance to cope with the radiation environment within the nuclear power plant. The buffer layer 13 is made of soft plastic with a low elastic modulus, effectively absorbing energy. This layer is located between the outer protective layer 12 and the support layer 14, serving to… The buffer layer 13 absorbs the energy when the sealing ring is subjected to external pressure or vibration caused by the rapid opening and closing of the butterfly valve, reducing the impact on the sealing ring body 1. The support layer 14 provides structural support for the sealing ring, ensuring its shape stability and uniform expansion. It is made of fiber material and is selected according to specific design requirements and usage environment to ensure that the sealing ring maintains good sealing performance under various working conditions. The inner sealing layer 15 is in direct contact with the sealing medium and is the key part to achieve the sealing function. It needs to have excellent elasticity and flexibility to fit tightly to the sealing surface and ensure that the medium does not leak. Like the outer protective layer 12, it is made of fluororubber and has the same performance.

[0031] Working principle: First, the corresponding sealing medium is injected into the sealing ring body 1 through the air nozzle 2 and the intermediate tube 3. Then, anti-leakage liquid is injected to prevent the sealing medium from escaping. The air nozzle 2 is inserted between the first pressure plate 5 and the second pressure plate 6. The first pressure plate 5 and the second pressure plate 6 drive the first sliding plate 7 and the second sliding plate 8 to move respectively. The first sliding plate 7 and the second sliding plate 8 compress the spring 11 and move on the first inclined rod 9 and the second inclined rod 10 respectively. After the air nozzle 2 is fully inserted between the first pressure plate 5 and the second pressure plate 6, the first pressure plate 5 and the second pressure plate 6 return to their original positions due to the action of the spring 11, fixing the air nozzle 2. By setting the sealing ring body 1 in layers, it has better corrosion resistance, wear resistance and radiation resistance.

[0032] 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 gas-filled hollow sealing ring for nuclear power plants, characterized in that, include: A sealing ring body (1) is provided with an air nozzle (2) at the top end of the sealing ring body (1). An intermediate tube (3) is fixedly connected to the middle of the bottom end of the air nozzle (2). The intermediate tube (3) is a hollow structure. The air nozzle (2) and the intermediate tube (3) are interconnected and arranged in a T-shape. The two ports of the sealing ring body (1) are respectively inserted into and connected to the two ends of the intermediate tube (3). The two ends of the sealing ring body (1) are fixedly connected to the outer wall of the corresponding position of the air nozzle (2). An outer protective layer (12) is provided on the inner wall of the sealing ring body (1). A buffer layer (13) is provided on the inner side of the outer protective layer (12). A support layer (14) is provided on the inner side of the buffer layer (13). An inner sealing layer (15) is provided on the inner side of the support layer (14). The bottom plate (4) is fixedly connected to the outer wall of the top of the sealing ring body (1). The front end of the bottom plate (4) is connected to the first sliding plate (7) through the first connecting component, and the rear end of the bottom plate (4) is connected to the second sliding plate (8) through the second connecting component.

2. The gas-filled hollow sealing ring for nuclear power plants according to claim 1, characterized in that: The connecting assembly includes a first pressure plate (5) rotatably connected to the inner wall of the bottom end of the base plate (4), and the rear end of the first slide plate (7) is fixedly connected to the top end of the first pressure plate (5).

3. The gas-filled hollow sealing ring for nuclear power plants according to claim 2, characterized in that: The first inclined rod (9) is fixedly connected to the front side of the top of the base plate (4), and the middle part of the first sliding plate (7) is slidably connected to the outer wall of the first inclined rod (9).

4. The gas-filled hollow sealing ring for nuclear power plants according to claim 1, characterized in that: The second connecting component includes a second pressure plate (6) rotatably connected to the inner wall of the bottom end of the base plate (4), and the front end of the second sliding plate (8) is fixedly connected to the top end of the second pressure plate (6).

5. A gas-filled hollow sealing ring for nuclear power plants according to claim 4, characterized in that: The bottom plate (4) is fixedly connected to the rear side of the top end of the second inclined rod (10), and the middle part of the second sliding plate (8) is slidably connected to the outer wall of the second inclined rod (10).

6. A gas-filled hollow sealing ring for nuclear power plants according to claim 1, characterized in that: Springs (11) are fixedly connected to the middle of the bottom of the first slide plate (7) and the second slide plate (8), and the bottom ends of the two springs (11) are fixedly connected to the front and rear sides of the top of the base plate (4).

7. A gas-filled hollow sealing ring for nuclear power plants according to claim 1, characterized in that: The top of the sealing ring body (1) has a through groove, the size of which is the same as that of the air nozzle (2).

8. A gas-filled hollow sealing ring for nuclear power plants according to claim 1, characterized in that: The outer protective layer (12) and the inner sealing layer (15) are both made of fluororubber material, the buffer layer (13) is made of soft plastic, and the support layer (14) is made of fiber material.

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