High-strength butterfly valve for nuclear power

Abstract

The utility model discloses a high strength butterfly valve for nuclear power, including valve body, valve plate, shaft sleeve, drive part and buffer energy absorption device, the utility model discloses a buffer energy absorption device is set up on the valve plate surface, when meeting water hammer effect, buffer board will be prior to valve plate and receive medium impact, in this process, the telescopic link will be pushed back to the inside of the connecting sleeve, and the spring force elasticity contracts, and the impact kinetic energy that buffer board received is absorbed, to avoid the most impact force of water hammer effect direct action on the valve plate, effectively improve the impact resistance of valve plate, and it is not easy to cause deformation to lead to leakage because of medium impact, through the distribution setting of at least four groups of buffer holes on the surface of buffer board, and the buffer board slows down medium impact through the buffer hole, prevents instantaneous load and leads to the damage of buffer energy absorption device.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically a high-strength butterfly valve for nuclear power plants. Background Technology

[0002] Butterfly valves are a common type of valve in nuclear power plant piping systems. They control the flow of fluid or regulate the flow rate by rotating the valve plate. They are characterized by their compact and lightweight structure, low operating torque, rapid opening and closing, low fluid resistance, good economy, and suitability for large-diameter pipelines.

[0003] Existing patent application number: 202221996769.X A butterfly valve for preventing the misalignment of the sealing ring includes a butterfly valve body, a connecting rod, a valve seat, and a handwheel, and also includes a valve plate. The butterfly valve body has a channel for installing the valve plate. A connecting rod is fixedly welded to the top of the butterfly valve body, and a valve seat is fixedly welded to the top of the connecting rod. A handwheel is mounted on the valve seat. A first mounting flange is fixedly sleeved on the outer side of one end of the butterfly valve body, and a second mounting flange is fixedly sleeved on the outer side of the butterfly valve body away from the first mounting flange.

[0004] The aforementioned patent describes the structural principle of the butterfly valve. In practical applications, the valve plate of the butterfly valve is often subjected to the impact force generated by the water hammer effect. If the valve plate is subjected to impact for a long time, its sealing surface may leak due to slight deformation, which will also reduce the service life of the butterfly valve. To address this issue, we propose a high-strength butterfly valve for nuclear power plants. Utility Model Content

[0005] The purpose of this invention is to provide a high-strength butterfly valve for nuclear power plants to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a high-strength butterfly valve for nuclear power, comprising a valve body, a valve plate, a bushing, a drive component, and a buffer energy absorption device. The valve plate is rotatably mounted inside the valve body. A bushing is welded to the top of the valve body, and a drive component is mounted on the top of the bushing. The drive component establishes a transmission connection with the valve plate through a valve stem. A buffer energy absorption device is provided on the surface of the valve plate. The buffer energy absorption device includes a connecting cavity, a through hole, a threaded sleeve, a cap, an elastic telescopic component, and a buffer plate. A connecting cavity is opened at the center of the back of the valve plate, and a through hole is opened at the center of the front of the valve plate, communicating with the interior of the connecting cavity. A threaded sleeve is welded to the middle of the back of the valve plate, communicating with the interior of the connecting cavity. A cap is threaded onto the outside of the threaded sleeve. An elastic telescopic component is installed inside the cap, with its front end passing through the through hole to the front of the valve plate. A buffer plate is installed at the front end of the elastic telescopic component.

[0007] Preferably, the diameter of the buffer plate is at least 70% of the diameter of the valve plate.

[0008] Preferably, the normal distance between the buffer plate and the valve plate is 5-20mm.

[0009] Preferably, the screw cap has an overall conical structure.

[0010] Preferably, the surface of the buffer plate is provided with at least four sets of buffer holes, which are connected from front to back through the buffer plate.

[0011] Preferably, the elastic telescopic component includes a connecting sleeve, a telescopic rod, a ring, and a spring. The connecting sleeve is screwed into the center of the inner side of the cap. The connecting sleeve passes through the threaded part and is inserted into the connecting cavity. The telescopic rod is slidably installed inside the connecting sleeve. The ring is fixedly fitted on the outer surface of the telescopic rod and is located inside the connecting cavity. The spring is fitted on the outside of the connecting sleeve. The tail end of the spring abuts against the cap, and the head end of the spring abuts against the ring. The telescopic rod slides along the inner side of the through hole in a sealing manner. The front end of the telescopic rod passes through the through hole and extends to the front of the valve plate. The front end of the telescopic rod is screwed into the buffer plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention incorporates a buffer energy-absorbing device on the valve plate surface. When encountering water hammer, the buffer plate is impacted by the medium before the valve plate. During this process, the telescopic rod is pushed back into the connecting sleeve, and the spring contracts elastically under force, absorbing the impact kinetic energy of the buffer plate. This prevents most of the impact force of the water hammer effect from directly acting on the valve plate, effectively improving the valve plate's impact resistance and making it less prone to deformation and leakage due to medium impact.

[0013] This invention features at least four sets of buffer holes distributed on the surface of the buffer plate. The buffer plate uses these buffer holes to reduce the impact of the medium and prevent damage to the energy absorption device caused by instantaneous load. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall front view of the present invention.

[0015] Figure 2 This is a front view schematic diagram of the valve plate in this utility model.

[0016] Figure 3 This is a top view of the valve plate in this utility model.

[0017] Figure 4 This is a top view cross-sectional structural diagram of the valve plate in this utility model.

[0018] Figure 5 This utility model Figure 4 A schematic diagram of the disassembled structure.

[0019] Figure 6 This is a top view cross-sectional structural diagram of the screw cap in this utility model.

[0020] In the diagram: Valve body-1, Valve plate-2, Bushing-3, Drive component-4, Buffer energy absorption device-5, Connecting cavity-51, Through hole-52, Threaded sleeve-53, Screw cap-54, Elastic telescopic component-55, Connecting sleeve-551, Telescopic rod-552, Ring-553, Spring-554, Buffer plate-56, Buffer hole-57. Detailed Implementation

[0021] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0022] Please see Figure 1 This utility model provides a high-strength butterfly valve for nuclear power, including a valve body 1, a valve plate 2, a bushing 3, a drive component 4, and a buffer energy absorption device 5. The valve plate 2 is rotatably installed inside the valve body 1, and the bushing 3 is welded to the top of the valve body 1. The drive component 4 is installed on the top of the bushing 3. The drive component 4 is connected to the valve plate 2 through the valve stem. The buffer energy absorption device 5 is provided on the surface of the valve plate 2.

[0023] Specifically, during use, the operating drive component 4 controls the valve plate 2 to flip open and close, thereby controlling the flow state of the valve body 1.

[0024] Please see Figure 2-5 This utility model provides a high-strength butterfly valve for nuclear power. The buffer energy absorption device 5 includes a connecting cavity 51, a through hole 52, a threaded sleeve 53, a cap 54, an elastic telescopic member 55, and a buffer plate 56. The connecting cavity 51 is opened in the center of the back of the valve plate 2, and the through hole 52 is opened in the center of the front of the valve plate 2. The through hole 52 is connected to the inside of the connecting cavity 51. The threaded sleeve 53 is welded to the middle of the back of the valve plate 2. The threaded sleeve 53 is connected to the inside of the connecting cavity 51. The cap 54 is screwed onto the outside of the threaded sleeve 53. The elastic telescopic member 55 is installed inside the cap 54. The front end of the elastic telescopic member 55 passes through the through hole 52 and extends to the front of the valve plate 2. The buffer plate 56 is installed at the front end of the elastic telescopic member 55.

[0025] In this invention, the diameter of the buffer plate 56 is at least 70% of the diameter of the valve plate 2 to provide sufficient shielding area for the valve plate 2 and reduce direct water flow. The normal distance between the buffer plate 56 and the valve plate 2 is 5-20mm, which provides sufficient buffering distance for the buffer plate 56 to prevent most of the impact force of the water hammer effect from acting directly on the valve plate 2.

[0026] To further explain, the cap 54 has an overall conical structure to reduce the impact resistance on the cap 54 and prevent loosening during installation.

[0027] The buffer plate 56 has at least four sets of buffer holes 57 distributed on its surface. The buffer holes 57 are connected to the front and back of the buffer plate 56. The buffer plate 56 reduces the impact of the medium through the buffer holes 57, and prevents the buffer energy absorption device 5 from being damaged by instantaneous load.

[0028] Please see Figure 6 This utility model provides a high-strength butterfly valve for nuclear power plants. The elastic telescopic component 55 includes a connecting sleeve 551, a telescopic rod 552, a ring 553, and a spring 554. The connecting sleeve 551 is screwed into the middle of the inner side of the cap 54. The connecting sleeve 551 passes through the threaded sleeve 53 and is inserted into the connecting cavity 51. The telescopic rod 552 is slidably installed inside the connecting sleeve 551. The ring 553 is fixedly fitted on the outer surface of the telescopic rod 552 and is located inside the connecting cavity 51. The spring 554 is fitted on the outside of the connecting sleeve 551. The tail end of the spring 554 abuts against the cap 54, and the head end of the spring 554 abuts against the ring 553, thereby providing telescopic elasticity for the telescopic rod 552. The telescopic rod 552 slides and seals along the inner side of the through hole 52. The front end of the telescopic rod 552 passes through the through hole 52 and extends to the front of the valve plate 2. The front end of the telescopic rod 552 is screwed into the buffer plate 56.

[0029] Specifically, by setting a buffer energy absorption device 5 on the surface of the valve plate 2, when encountering the water hammer effect, the buffer plate 56 will be impacted by the medium before the valve plate 2. During this process, the telescopic rod 552 will be pushed back into the connecting sleeve 551, and at the same time, the spring 554 will be elastically contracted under force to absorb the impact kinetic energy of the buffer plate 56, so as to avoid most of the impact force of the water hammer effect from directly acting on the valve plate 2, effectively improving the impact resistance of the valve plate 2, and making it less likely to deform due to the impact of the medium and cause leakage.

[0030] The above description is merely 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 high-strength butterfly valve for nuclear power, comprising a valve body (1), a valve plate (2), a bushing (3), and a drive component (4), wherein the valve plate (2) is rotatably mounted inside the valve body (1), the bushing (3) is welded to the top of the valve body (1), and the drive component (4) is mounted on the top of the bushing (3), and the drive component (4) is connected to the valve plate (2) through the valve stem; Its features are: It also includes a buffer energy absorption device (5). The surface of the valve plate (2) is provided with a buffer energy absorption device (5). The buffer energy absorption device (5) includes a connecting cavity (51), a through hole (52), a threaded sleeve (53), a screw cap (54), an elastic telescopic member (55), and a buffer plate (56). The valve plate (2) has a connecting cavity (51) at the center of its back side and a through hole (52) at the center of its front side. The through hole (52) is connected to the inside of the connecting cavity (51). The valve plate (2) has a threaded sleeve (53) welded to the middle of its back side. The threaded sleeve (53) is connected to the inside of the connecting cavity (51). The screw cap (54) is screwed onto the outside of the threaded sleeve (53). An elastic telescopic member (55) is installed inside the screw cap (54). The front end of the elastic telescopic member (55) passes through the through hole (52) and extends to the front side of the valve plate (2). A buffer plate (56) is installed at the front end of the elastic telescopic member (55).

2. The high-strength butterfly valve for nuclear power plants according to claim 1, characterized in that: The diameter of the buffer plate (56) is at least 70% of the diameter of the valve plate (2).

3. The high-strength butterfly valve for nuclear power plants according to claim 1, characterized in that: The normal distance between the buffer plate (56) and the valve plate (2) is 5-20mm.

4. The high-strength butterfly valve for nuclear power plants according to claim 1, characterized in that: The screw cap (54) has an overall conical structure.

5. The high-strength butterfly valve for nuclear power plants according to claim 1, characterized in that: The buffer plate (56) has at least four sets of buffer holes (57) distributed on its surface, and the buffer holes (57) are connected to the buffer plate (56) from front to back.

6. The high-strength butterfly valve for nuclear power plants according to claim 1, characterized in that: The elastic telescopic component (55) includes a connecting sleeve (551), a telescopic rod (552), a ring (553), and a spring (554). The connecting sleeve (551) is screwed into the center of the inner side of the cap (54). The connecting sleeve (551) passes through the threaded sleeve (53) and is inserted into the connecting cavity (51). The telescopic rod (552) is slidably installed inside the connecting sleeve (551). The ring (553) is sleeved and fixed on the outer surface of the telescopic rod (552). 3) Located inside the connecting cavity (51), the connecting sleeve (551) is fitted with a spring (554). The tail end of the spring (554) abuts against the cap (54), and the head end of the spring (554) abuts against the ring (553). The telescopic rod (552) slides along the inside of the through hole (52) in a sealed manner. The front end of the telescopic rod (552) passes through the through hole (52) and extends to the front of the valve plate (2). The front end of the telescopic rod (552) is screwed onto the buffer plate (56).

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