Deep sea flat gate valve with pressure resistant structure

Abstract

The application relates to the technical field of deep-sea valves, and discloses a deep-sea flat gate valve with a pressure-resistant structure, which comprises a main body, a cavity is arranged in the main body, and the inner wall of the cavity is fixedly connected with an inclined plate. The fluid exerts a thrust on the gap between the rectangular plate and the arc-shaped plate I, so that the rectangular plate and the arc-shaped plate I jointly push the rotating cylinder to rotate around the fixed shaft, when the fluid pressure in the water inlet groove is relatively large, the fluid passes through the gap between the arc-shaped plate I and the rectangular plate, pushes the rotating cylinder to rotate back and forth, and drives the two rectangular plates to swing back and forth, so that the pressure of the fluid in the cavity is weakened, the situation that the fluid impacts the valve plate in the valve body due to the relatively large fluid pressure is avoided, the sealing surface of the valve plate is damaged, the device realizes pressure compensation under different pressure conditions, and the overall quality of the device during fluid conveying is improved.

Description

Technical Field

[0001] This invention relates to the field of deep-sea valve technology, specifically to a deep-sea flat gate valve with a pressure-resistant structure. Background Technology

[0002] This valve is a key control device designed specifically for high-pressure environments in the deep sea. By integrating a pressure balancing mechanism into the valve body, this technology effectively solves the problems of difficulty in opening and closing and sealing failure caused by excessive internal and external pressure differences in traditional deep-sea valves. It is widely used in key fields such as seabed oil and gas extraction, underwater manifold systems and ballast regulation of deep-sea submersibles. During the use of this device, the main body is first connected to the water supply pipe on one side of the inlet tank, and the side with the drain tank is connected to the other pipes. When the fluid is transported through the main body, the rotating wheel is rotated. When the rotating wheel rotates, it drives the valve plate at the bottom to move upward through the valve stem, so that the inside of the cavity is connected. The fluid enters the cavity through the inlet tank and then moves to the external pipe through the drain tank, thus completing the transport of the fluid. During this operation, when transporting deep-sea fluid through this valve, the high fluid pressure can easily cause the fluid to impact the inclined plate and valve plate inside the valve body, resulting in damage to the surface of the inclined plate and valve plate. This affects the pressure compensation effect of the components and the overall quality of fluid transport. Summary of the Invention

[0003] The purpose of this invention is to provide a deep-sea flat gate valve with a pressure-resistant structure to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a deep-sea flat gate valve with a pressure-resistant structure, comprising a main body, an internal cavity, an inclined plate fixedly connected to the inner wall of the cavity, and further comprising: A rotating mechanism is installed inside the main body and is used to rotate when the main body is opened and fluid is being transported. The flow guiding mechanism is installed inside the main body and is used to guide the flow of fluid inside the main body.

[0005] Furthermore, a drainage groove is provided on the back of the cavity, and a water inlet groove is provided on the side wall of the cavity. The main body also includes: The opening and closing assembly is installed inside the main body and is used to control the flow of fluid within the main body. The positioning component is installed inside the cavity to assist the movement of the other components.

[0006] Furthermore, the rotating mechanism includes: The oscillating component is mounted on the outer surface of the positioning component and is used to oscillate under the pressure of the fluid during fluid delivery. A retraction component is installed on the side wall of the positioning component and is used to retract when the swing component swings.

[0007] Furthermore, lead generation agencies include: The sliding component is installed inside the water inlet tank and is used to slide under the pressure of the fluid.

[0008] Furthermore, the opening and closing assembly includes a valve plate that is slidably connected inside the inclined plate, a valve stem that is fixedly connected to the top of the valve plate, and a rotating wheel that is threaded onto the outer surface of the valve stem; The bottom of the rotating wheel is rotatably connected to the top of the main body.

[0009] Furthermore, the positioning component includes a fixed shaft fixedly disposed inside the cavity, and two fixing strips are fixedly connected to the outer surface of the fixed shaft; The top of the fixed shaft is fixedly connected to the bottom of the inclined plate.

[0010] Furthermore, the oscillating assembly includes a rotating cylinder rotatably disposed on the outer surface of a fixed shaft, and a rectangular plate is fixedly connected to the outer surface of the rotating cylinder.

[0011] Furthermore, flow channels are provided on the side walls of the rectangular plates, and an arc-shaped plate is fixedly connected to the side of the two rectangular plates that are close to each other.

[0012] Furthermore, the sidewall of the swing plate is rotatably connected to the sidewall of the rectangular plate, and the bottom of the L-shaped rod is fixedly connected to the top of the rectangular plate. The bottom of the L-shaped rod contacts the top of the swing plate.

[0013] Furthermore, the sliding assembly includes an arc-shaped plate two fixedly connected to the inner wall of the water inlet tank, and a sliding ring is fixedly connected to the side of the arc-shaped plate two near the cavity; Among them, the arc-shaped plate 2 is elastically designed, and the outer surface of the sliding ring is slidably connected to the inner wall of the water inlet tank.

[0014] The present invention has the following beneficial effects: (1) In this invention, when the rotating cylinder rotates, it drives another rectangular plate to move towards the water inlet. When the arc plate connected to the rectangular plate rotates to the outlet of the water inlet, the fluid applies a thrust to the gap between the rectangular plate and the arc plate, so that the rectangular plate and the arc plate together push the rotating cylinder to rotate around the fixed axis. Thus, when the fluid pressure entering the water inlet is large, the fluid will pass through the arc plate and the gap between the arc plate and the rectangular plate, pushing the rotating cylinder to rotate back and forth. This causes the rotating cylinder to drive the two rectangular plates to swing back and forth, weakening the pressure of the fluid entering the cavity. This reduces the situation where the fluid pressure is large and the fluid impacts the valve plate inside the valve body, causing damage to the valve plate sealing surface, when the deep-sea fluid is transported through the valve. This allows the device to achieve pressure compensation under different pressure conditions and improves the overall quality of the device when transporting fluid.

[0015] (2) In this invention, when the fluid pressure is large and impacts the rectangular plate and the arc plate, the dispersed part of the fluid reduces the fluid pressure. When the fluid pressure is small, it will flow directly into the cavity through the gap between the rectangular plate and the cavity, as well as the inside of the flow channel. This reduces the situation where the fluid backflows between the two rectangular plates when it pushes the rectangular plate to swing the rotating cylinder after contacting the gap between the arc plate and the rectangular plate. This allows the fluid to be transported to the outside better after the pressure is reduced, thus improving the efficiency of the device in fluid transportation.

[0016] (3) In this invention, after the arc plate two is pushed, it will push the sliding ring to slide inside the water inlet tank. When the sliding ring slides, the overall length of the arc plate two becomes longer and the conical opening formed by the arc plate two will also expand, thereby weakening part of the fluid's thrust. When the fluid enters the cavity through the arc plate two, the pressure in contact with the rectangular plate and the arc plate one remains stable, which enhances the pressure compensation effect of the device when transporting fluid and further improves the overall quality of the device when transporting fluid.

[0017] (4) In this invention, when the swing plate moves, the side wall near the arc spring will be subjected to the counter-thrust of the fluid. At this time, the L-shaped rod on the rectangular plate will push the swing plate to follow the rectangular plate, thereby applying a thrust to the arc spring to make the arc spring contract and accumulate potential energy. This makes it convenient for the arc spring to apply a reset thrust to the swing plate when the other rectangular plate is pushed by the fluid to drive the rotating cylinder to rotate. This reduces the situation where the swing plate swings back and forth inside the cavity due to the counter-thrust of the fluid inside the cavity when the rectangular plate swings and drives the swing plate to move, affecting the fluid pressure compensation of other components. This limits the rotation of the swing plate and further improves the efficiency of the device in fluid transportation.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall partial cross-sectional structure of the present invention; Figure 3 This is a partial cross-sectional view of the positioning component of the present invention; Figure 4 This is a partial cross-sectional view of the swing assembly of the present invention; Figure 5 This is a diagram showing the connection relationships of the shrinkage components of the present invention; Figure 6 This is a diagram showing the connection relationship of the sliding component of the present invention; Figure 7 This is a plan view of the swing component of the present invention; Figure 8 This is a diagram showing the connection relationships of the shrinkage components of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle.

[0021] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Main body; 101. Cavity; 102. Inclined plate; 103. Water inlet trough; 11. Opening and closing assembly; 111. Valve plate; 112. Valve stem; 113. Rotating wheel; 12. Positioning assembly; 121. Fixed shaft; 122. Fixed bar; 2. Rotating mechanism; 21. Swing assembly; 211. Rotating cylinder; 212. Rectangular plate; 213. Flow channel; 214. Arc plate one; 22. Contraction assembly; 221. Arc spring; 222. Swing plate; 223. L-shaped rod; 3. Drainage mechanism; 31. Sliding assembly; 311. Arc plate two; 312. Sliding ring. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0023] Please see Figures 1-9 As shown, the present invention is a deep-sea flat gate valve with a pressure-resistant structure, including a main body 1, a cavity 101 provided inside the main body 1, an inclined plate 102 fixedly connected to the inner wall of the cavity 101, and further including: Rotating mechanism 2 is installed inside the main body 1 and is used to rotate when fluid is conveyed after the main body 1 is opened; The flow guiding mechanism 3 is installed inside the main body 1 and is used to guide the flow of fluid inside the main body 1.

[0024] A drainage groove is provided on the back of the cavity 101, and a water inlet groove 103 is provided on the side wall of the cavity 101. The main body 1 also includes: The opening and closing assembly 11 is installed inside the main body 1 and is used to control the flow of fluid inside the main body 1. Positioning component 12 is installed inside cavity 101 to assist the movement of other components.

[0025] Rotating mechanism 2 includes: The oscillating component 21 is mounted on the outer surface of the positioning component 12 and is used to oscillate under the pressure of the fluid during fluid delivery. The shrinking component 22 is installed on the side wall of the positioning component 12 and is used to shrink when the swinging component 21 swings.

[0026] Traffic generation agency 3 includes: The sliding component 31 is installed inside the water inlet tank 103 and is used to slide under the push of the fluid.

[0027] The opening and closing assembly 11 includes a valve plate 111 that is slidably connected inside the inclined plate 102. A valve stem 112 is fixedly connected to the top of the valve plate 111, and a rotating wheel 113 is threadedly connected to the outer surface of the valve stem 112. The bottom of the rotating wheel 113 is rotatably connected to the top of the main body 1. When the fluid is transported through the main body 1, the operator rotates the rotating wheel 113 by controlling the underwater operation robot. When the rotating wheel 113 rotates, it will drive the valve stem 112 to rotate.

[0028] The positioning component 12 includes a fixed shaft 121 fixedly disposed inside the cavity 101, and two fixing strips 122 are fixedly connected to the outer surface of the fixed shaft 121; The top of the fixed shaft 121 is fixedly connected to the bottom of the inclined plate 102. When the side wall of the rectangular plate 212 is pushed by the fluid and the rotating cylinder 211 rotates, the rotating cylinder 211 will move closer to the fixed strip 122 on one side and then contact the side wall of the fixed strip 122 to achieve positioning.

[0029] The oscillating assembly 21 includes a rotating cylinder 211 rotatably disposed on the outer surface of the fixed shaft 121. A rectangular plate 212 is fixedly connected to the outer surface of the rotating cylinder 211. Fluid will pass through the gap between the arc plate 214 and the rectangular plate 212, and the outer surface of the arc plate 214 will push the rectangular plate 212 to rotate in the direction of the outer surface of the fixed shaft 121 toward the fixed bar 122.

[0030] The sidewall of the rectangular plate 212 is provided with a flow groove 213. An arc plate 214 is fixedly connected to the side of the two rectangular plates 212 that are close to each other. When the arc plate 214 connected to the rectangular plate 212 rotates to the outlet of the water inlet trough 103, the fluid applies a thrust to the gap between the rectangular plate 212 and the arc plate 214, so that the rectangular plate 212 and the arc plate 214 jointly push the rotating cylinder 211 to rotate around the fixed shaft 121.

[0031] The shrinking assembly 22 includes an arc spring 221 fixedly connected to the side of the fixing bar 122 near the rectangular plate 212. The end of the arc spring 221 away from the fixing bar 122 is fixedly connected to a swing plate 222. An L-shaped rod 223 is provided on the top of the swing plate 222. Among them, the side wall of the swing plate 222 is rotatably connected to the side wall of the rectangular plate 212, and the bottom of the L-shaped rod 223 is fixedly connected to the top of the rectangular plate 212. The bottom of the L-shaped rod 223 contacts the top of the swing plate 222. When the swing plate 222 moves, the side wall of the swing plate 222 near the arc spring 221 will be subjected to the counter-thrust force of the fluid because the cavity 101 is filled with fluid.

[0032] The sliding assembly 31 includes an arc-shaped plate 311 fixedly connected to the inner wall of the water inlet tank 103, and a sliding ring 312 fixedly connected to the side of the arc-shaped plate 311 near the cavity 101. Among them, the arc-shaped plate 311 is elastically set as a whole, and the outer surface of the sliding ring 312 is slidably connected to the inner wall of the water inlet trough 103. When the arc-shaped plate 311 is pushed, it will push the sliding ring 312 to slide inside the water inlet trough 103. When the sliding ring 312 slides, the overall length of the arc-shaped plate 311 becomes longer, and the conical opening formed by the arc-shaped plate 311 will also expand.

[0033] In use, the main body 1 is first connected to the water supply pipe on one side of the water inlet trough 103, and the side with the drainage trough is connected to the other pipes. When the fluid is transported through the main body 1, the operator controls the underwater robot to rotate the rotating wheel 113. When the rotating wheel 113 rotates, the valve stem 112 will move upward. When the valve stem 112 moves, it will drive the valve plate 111 to move upward inside the main body 1. When the valve stem 112 moves, the bottom valve plate 111 will disengage from the inclined plate 102, making the interior of the cavity 101 connected. Then the fluid is transported. When the fluid enters the bottom of the cavity 101 through the water inlet trough 103, it will flow to the top of the cavity 101 through the opening of the inclined plate 102. After the fluid enters the top of the cavity 101, it will move to the outside pipe through the drainage trough, and then enter the storage device through the pipe, thus realizing the complete movement process of the valve body.

[0034] When the fluid flows into the cavity 101 through the inlet tank 103, it comes into contact with the sidewalls of the two rectangular plates 212 fixed on the outer surface. Since one of the rectangular plates 212 has a larger contact area with the incoming fluid in its initial state, the fluid with lower pressure entering the inlet tank 103 exerts a thrust on the rectangular plate 212 and the arc-shaped plate 214. The fluid then flows into the cavity 101 through the flow channel 213 or other spaces, and is discharged outwards through the opening of the cavity 101. When the fluid pressure entering the inlet tank 103 is higher, it exerts a thrust on the rectangular plate 212 and the arc-shaped plate 214. When the rectangular plate 212 and the arc-shaped plate 214 with the larger contact area with the fluid are subjected to this thrust, the fluid passes through the gap between the arc-shaped plate 214 and the rectangular plate 212, and the outer surface of the arc-shaped plate 214 pushes the rectangular plate 212 to rotate in the direction of the fixed bar 122 on the outer surface of the fixed shaft 121. When the rotating cylinder 211 rotates, it carries... The other rectangular plate 212 moves towards the water inlet trough 103. When the arc-shaped plate 214 connected to the rectangular plate 212 rotates to the outlet of the water inlet trough 103, the fluid exerts a thrust on the gap between the rectangular plate 212 and the arc-shaped plate 214, causing the rectangular plate 212 and the arc-shaped plate 214 to jointly push the rotating cylinder 211 to rotate around the fixed axis 121. Thus, when the fluid pressure entering the water inlet trough 103 is high, the fluid will pass through the arc-shaped plate 214 and the gap between the arc-shaped plate 214 and the rectangular plate 212, pushing the rotating cylinder 211 to rotate back and forth. This causes the rotating cylinder 211 to drive the two rectangular plates 212 to swing back and forth, weakening the pressure of the fluid entering the cavity 101. This reduces the situation where the fluid pressure is too high when transporting deep-sea fluid through the valve, causing the fluid to impact the valve plate 111 inside the valve body and damage the sealing surface of the valve plate 111. This allows the device to achieve pressure compensation under different pressure conditions and improves the overall quality of the device when transporting fluid.

[0035] When the fluid passes through the inlet trough 103 and contacts the outer surface of the arc-shaped plate 214, a portion of the fluid enters between the two rectangular plates 212 and exerts a thrust on the side wall of the swing plate 222. When the swing plate 222 is subjected to this thrust, it swings along the side wall of the rectangular plate 212, causing the gap between the flow groove 213 on the rectangular plate 212 and the swing plate 222 to decrease. During this process, a portion of the fluid enters the cavity 101 through the flow groove 213 and is then transported outwards through the opening of the inclined plate 102. Thus, when the fluid pressure is high, it exerts a thrust on the rectangular plate 212 and the arc-shaped plate 222. When the curved plate 214 impacts, it disperses some of the fluid, reducing the fluid pressure. When the fluid pressure is low, it flows directly into the cavity 101 through the gap between the curved plate 212 and the cavity 101, as well as the interior of the flow channel 213. This reduces the backflow of fluid between the two rectangular plates 212 when the fluid pushes the rectangular plate 212 to drive the rotating cylinder 211 to swing after contacting the gap between the curved plate 214 and the rectangular plate 212. This allows the fluid to be transported to the outside better after the pressure is reduced, improving the efficiency of the device in fluid transportation.

[0036] When the fluid flows into the cavity 101 through the inlet tank 103, when the fluid pressure is low, it will contact the inclined surface of the second arc plate 311 during the fluid flow. Guided by the inclined surface of the second arc plate 311, the fluid will increase its pressure during flow and flow into the body 1 from the conical opening formed by the second arc plate 311. When the fluid pressure is high, when the fluid contacts the inclined surface of the second arc plate 311, it will exert a thrust on the inclined surface of the second arc plate 311. After the second arc plate 311 is subjected to the thrust, it will push the sliding ring 312. The sliding ring 312 slides inside the water inlet tank 103. As the sliding ring 312 slides, the overall length of the arc plate 211 increases, and the conical opening formed by the arc plate 211 also expands, thereby weakening part of the fluid thrust. This ensures that when the fluid passes through the arc plate 211 and enters the cavity 101, the pressure in contact with the rectangular plate 212 and the arc plate 214 remains stable, enhancing the pressure compensation effect of the device when transporting fluid and further improving the overall quality of the device when transporting fluid.

[0037] When the rotating cylinder 211 rotates due to the fluid pushing the side wall of the rectangular plate 212, the rotating cylinder 211 moves closer to the fixed strip 122 on one side and then contacts the side wall of the fixed strip 122 to achieve positioning. During the rotation of the rectangular plate 212, the swing plate 222 moves. When the swing plate 222 moves, since the cavity 101 is filled with fluid, the side wall of the swing plate 222 near the arc spring 221 will be subjected to the counter-force of the fluid. At this time, the L-shaped spring on the rectangular plate 212... The lever 223 pushes the swing plate 222 to move with the rectangular plate 212, thereby applying a thrust to the arc spring 221, causing the arc spring 221 to contract and accumulate potential energy. This facilitates the application of a reset thrust to the swing plate 222 when the other rectangular plate 212 is driven by the fluid to rotate the rotating cylinder 211. The L-shaped lever 223 then drives the rectangular plate 212 to rotate, reducing the possibility of the swing plate 222 swinging back and forth inside the cavity 101 due to the counter-thrust of the fluid inside the cavity 101 when the rectangular plate 212 swings and drives the swing plate 222 to move. This would affect the fluid pressure compensation of other components and limit the rotation of the swing plate 222, further improving the efficiency of the device in fluid transportation.

[0038] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A deep-sea flat gate valve with a pressure-resistant structure, comprising a body (1), wherein a cavity (101) is provided inside the body (1), and an inclined plate (102) is fixedly connected to the inner wall of the cavity (101), characterized in that, Also includes: Rotating mechanism (2), which is installed inside the main body (1) and is used to rotate when the main body (1) is opened and fluid is transported; The flow guiding mechanism (3) is installed inside the main body (1) to guide the flow of fluid inside the main body (1).

2. A deep-sea flat gate valve with a pressure-resistant structure according to claim 1, wherein a drainage groove is provided on the back of the cavity (101), and a water inlet groove (103) is provided on the side wall of the cavity (101), characterized in that: The main body (1) also includes: An opening and closing assembly (11) is installed inside the main body (1) and is used to control the flow of fluid within the main body (1). Positioning component (12) is installed inside the cavity (101) to assist the other components in their movement.

3. A deep-sea flat gate valve with a pressure-resistant structure according to claim 2, characterized in that: The rotating mechanism (2) includes: The oscillating component (21) is mounted on the outer surface of the positioning component (12) and is used to oscillate under the pressure of the fluid during fluid delivery; A shrinking component (22) is installed on the side wall of the positioning component (12) for shrinking when the swinging component (21) swings.

4. A deep-sea flat gate valve with a pressure-resistant structure according to claim 3, characterized in that: The drainage mechanism (3) includes: A sliding component (31) is installed inside the water inlet tank (103) and is used to slide under the pressure of the fluid.

5. A deep-sea flat gate valve with a pressure-resistant structure according to claim 4, characterized in that: The opening and closing assembly (11) includes a valve plate (111) slidably connected inside the inclined plate (102), a valve stem (112) is fixedly connected to the top of the valve plate (111), and a rotating wheel (113) is threadedly connected to the outer surface of the valve stem (112). The bottom of the rotating wheel (113) is rotatably connected to the top of the main body (1).

6. A deep-sea flat gate valve with a pressure-resistant structure according to claim 5, characterized in that: The positioning component (12) includes a fixed shaft (121) fixedly disposed inside the cavity (101), and two fixing strips (122) are fixedly connected to the outer surface of the fixed shaft (121). The top of the fixed shaft (121) is fixedly connected to the bottom of the inclined plate (102).

7. A deep-sea flat gate valve with a pressure-resistant structure according to claim 6, characterized in that: The swing assembly (21) includes a rotating cylinder (211) rotatably disposed on the outer surface of a fixed shaft (121), and a rectangular plate (212) is fixedly connected to the outer surface of the rotating cylinder (211).

8. A deep-sea flat gate valve with a pressure-resistant structure according to claim 7, characterized in that: The sidewall of the rectangular plate (212) is provided with a flow groove (213), and an arc plate (214) is fixedly connected to the side of the two rectangular plates (212) that are close to each other.

9. A deep-sea flat gate valve with a pressure-resistant structure according to claim 6, characterized in that: The shrinking assembly (22) includes an arc spring (221) fixedly connected to the side of the fixing bar (122) near the rectangular plate (212). The end of the arc spring (221) away from the fixing bar (122) is fixedly connected to a swing plate (222), and an L-shaped rod (223) is provided on the top of the swing plate (222). The sidewall of the swing plate (222) is rotatably connected to the sidewall of the rectangular plate (212), and the bottom of the L-shaped rod (223) is fixedly connected to the top of the rectangular plate (212). The bottom of the L-shaped rod (223) contacts the top of the swing plate (222).

10. A deep-sea flat gate valve with a pressure-resistant structure according to claim 9, characterized in that: The sliding assembly (31) includes an arc-shaped plate (311) fixedly connected to the inner wall of the water inlet tank (103), and a sliding ring (312) is fixedly connected to the side of the arc-shaped plate (311) near the cavity (101). The arc-shaped plate (311) is elastically configured as a whole, and the outer surface of the sliding ring (312) is slidably connected to the inner wall of the water inlet tank (103).

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