A high-sealing valve device for the conventional island of a nuclear power plant

Abstract

The present invention relates to a high-sealing valve device for the conventional island of a nuclear power plant, which includes a valve body, a valve cover, a valve stem and an inflation device. An inlet and an outlet are provided on both sides inside the valve body, and the inlet is communicated with the outlet through a sealing port. The valve cover is installed on the valve body, the valve stem passes through the valve cover and is rotatably connected thereto. A valve flap is provided at the bottom end of the valve stem, and a clamping assembly is relatively embedded on the valve flap. The clamping assembly includes a housing, a clamping block and a return spring. The housing is located below the valve flap, a piston is provided inside the housing, one end of the clamping block is fixed on the piston, the other end of the clamping block can sequentially pass through the housing and the valve flap, the return spring is sleeved outside the clamping block, and its two ends are respectively connected to the piston and the housing. The inflation device is connected to the housing through an inflation pipe. The present invention effectively solves the problems existing in the use of existing valves, such as large wear degree between the valve flap and the sealing port, easy occurrence of fluid leakage, poor sealing performance, affecting the normal use of the valve, shortening its service life and increasing the maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant valves, and particularly to a high-sealing valve device for a nuclear power plant conventional island. Background Art

[0002] A valve is a control component in a fluid delivery system and has functions such as cut-off, regulation, diversion, prevention of backflow, pressure stabilization, flow splitting, or overflow pressure relief. Valves used in fluid control systems range from the simplest stop valve to various valves used in extremely complex automatic control systems, and there is a wide variety of their types and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. Valves are also classified into cast iron valves, cast steel valves, stainless steel valves, chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, duplex steel valves, plastic valves, non-standard customized valves, etc. according to the material.

[0003] Currently, when the existing valve is closed, the valve flap is pushed to contact the sealing port through the thread effect of the valve stem and the valve cover, so as to play the role of opening and closing. However, it does not have the function of preventing loosening. Under the action of the fluid pressure, the valve flap vibrates at the sealing port inside the valve, and the wear degree between the valve flap and the sealing port is relatively large, which easily causes a gap between the valve flap and the sealing port, resulting in fluid leakage problems, reducing the sealing performance, affecting the normal use of the valve, shortening its service life, and increasing the maintenance cost. Secondly, due to the impact of the fluid on the valve flap, the valve flap often vibrates on the sealing port of the inner wall of the valve, which easily causes the valve stem to deform or the phenomenon of slipping threads, and the use effect is poor. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-sealing valve device for a nuclear power plant conventional island in view of the deficiencies of the prior art. Through the cooperative design of the valve body, valve cover, valve stem, and inflation device, it effectively solves the problems that when the existing valve is used, the wear degree between the valve flap and the sealing port is large, fluid leakage is likely to occur, the sealing performance is poor, affecting the normal use of the valve, shortening its service life, and increasing the maintenance cost.

[0005] The technical solution adopted by the present invention:

[0006] A high-sealing valve device for the conventional island of a nuclear power plant, comprising a valve body, a valve cover, a valve stem and an inflation device. Both sides inside the valve body are provided with an inlet and an outlet. The inlet is communicated with the outlet through a sealing port. The valve cover is installed on the valve body. The valve stem passes through the valve cover and is rotatably connected thereto. A T-shaped valve flap for closing and opening the sealing port is provided at the bottom end of the valve stem. Clamping components are relatively embedded on the valve flap. The clamping components include a housing embedded in the valve flap, a clamping block with a triangular cross-section and a return spring. The housing is located at the lower part of the valve flap. A piston slidably connected thereto is provided inside the housing. One end of the clamping block is fixed on the piston. The other end of the clamping block can sequentially penetrate through the housing and the valve flap. The return spring is sleeved outside the clamping block, and its two ends are respectively connected to the piston and the housing. Channels are provided on both the valve stem and the valve flap. The inflation device is connected to the housing through an inflation pipe embedded in the channel.

[0007] Further, the inflation device includes an air pump and a controller. The air pump is connected to the housing through an inflation pipe. An exhaust shunt pipe is connected to the inflation pipe. An intake solenoid valve and an exhaust solenoid valve are respectively provided on the inflation pipe and the exhaust shunt pipe. The controller is respectively connected to the air pump, the intake solenoid valve and the exhaust solenoid valve.

[0008] Further, a runner is provided at the top end of the valve stem.

[0009] Further, a left connecting flange and a right connecting flange are respectively provided on both sides of the valve body.

[0010] Further, scale lines and a number of uniformly arranged locking grooves are provided on the valve stem.

[0011] Further, a cavity, a left lateral locking component and a right lateral locking component are embedded in the valve cover. The cavity has a long strip structure and is located in the middle of the valve cover. The valve stem vertically passes through the cavity. A vertical locking component for clamping the valve stem is provided inside the cavity. The left lateral locking component and the right lateral locking component are respectively communicated with the cavity. The left lateral locking component and the right lateral locking component are respectively engaged with the locking grooves on the valve stem.

[0012] Further, the vertical locking component includes a shock-absorbing block and a compression spring. The shock-absorbing block is provided on the valve stem and is located inside the cavity. The shock-absorbing block is connected to the bottom of the cavity through the compression spring. The compression spring is sleeved outside the valve stem. Internal threads are provided on the outside of the shock-absorbing block. The internal threads are matched with the external threads provided at the lower part of the cavity.

[0013] Further, both the left and right lateral locking assemblies include a box body, a locking block, a movable rod, and several compression springs. A through hole is provided at the left end of the box body, and the through hole communicates with the cavity. A sliding plate, a left fixed block, and a right fixed block are arranged inside the box body. The left fixed block and the right fixed block are oppositely arranged and located on the left side of the sliding plate. Both sides of the sliding plate are respectively connected to the left fixed block and the right fixed block through compression springs. A support rod is provided in the middle on the left side of the sliding plate. The locking block is arranged at the end of the support rod and corresponds to the through hole. The locking block corresponds to the locking groove. One end of the movable rod is horizontally arranged in the middle on the right side of the sliding plate, and the other end respectively passes through the right end of the box body and the valve cover and is slidably connected thereto.

[0014] Further, both the locking block and the locking groove are designed as conical structures.

[0015] Further, telescopic rods are respectively arranged between the sliding plate and the right fixed block and the left fixed block, and the telescopic rods are located inside the compression springs.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The structure of the present invention is simple and easy to use. Through the cooperative design of the valve body, the valve cover, the valve rod, and the inflation device, it effectively solves the problems existing in the use of existing valves, such as large wear between the valve flap and the sealing port, easy occurrence of fluid leakage, poor sealing performance, affecting the normal use of the valve, shortening its service life, and increasing maintenance costs.

[0018] 2. The present invention can effectively overcome the loss of the valve flap and the sealing port inside the valve under the impact of fluid, enhance the sealing performance of the valve flap and the sealing port, extend the service life, and reduce the maintenance cost.

[0019] 3. The inflation device transports gas into the interior of the housing through the inflation pipe. Since the transported gas is continuous, the gas pressure inside the housing gradually increases. The gas pressure is used to push the piston to move inside the housing. The piston gradually moves outward. Then, the piston drives the clamping block to move outward against the elastic force of the return spring. The clamping block sequentially passes through the housing and the valve flap. The clamping block can closely fit on the lower surface of the sealing port. Through the mutual cooperation of the clamping block of the clamping assembly and the top (protrusion) of the valve flap, the valve flap can closely fit on the sealing port, effectively reducing the impact of fluid on the valve flap, large wear between the valve flap and the sealing port, poor sealing performance, easy looseness of the seal between the valve flap and the sealing port, and easy fluid leakage; at the same time, it effectively avoids the vibration of the valve flap due to the fluid pressure, thereby preventing the valve rod from rotating, with better use effect and extending the service life of the valve rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a cross-sectional view of the present invention;

[0022] Figure 3 is an enlarged view of part A in object 2;

[0023] Figure 4 is a state diagram of the present invention;

[0024] Figure 5 is the present invention Figure 4 is an enlarged view of part B therein;

[0025] Figure 6 is a structural schematic diagram of the clamping block of the present invention;

[0026] Figure 7 is a structural schematic diagram of the inflation device of the present invention;

[0027] In the figure: 1, valve body; 2, valve cover; 3, valve rod; 4, runner; 5, left connecting flange; 6, right connecting flange; 7, inflation pipe; 8, cavity; 9, valve flap; 10, sealing port; 11, outlet; 12, inlet; 13, compression spring; 14, shock absorber block; 15, clamping block; 16, piston; 17, housing; 18, return spring; 19, inflation pump; 20, intake solenoid valve; 21, exhaust shunt pipe; 22, exhaust solenoid valve; 23, locking groove; 24, button; 25; scale line; 26, movable rod; 27, slide plate; 28, box body; 29, support rod; 30, extrusion spring; 31, right fixing block; 32, locking block; 33, telescopic rod; 34, through hole; 35, left fixing block. Detailed implementation manners

[0028] For a better understanding of the technical content of the present invention, specific embodiments are provided below, and the present invention will be further described in conjunction with the accompanying drawings.

[0029] See Figures 1 to 6, the present invention provides a high-sealing valve device for the conventional island of a nuclear power plant, including a valve body 1, a valve cover 2, a valve stem 3 and an inflation device. On both sides inside the valve body 1, there are an inlet 12 and an outlet 11. The inlet 12 is communicated with the outlet 11 through a sealing port 10. The fluid sequentially passes through the inlet 12, the sealing port 10 and the outlet 11 inside the valve body 1. The valve cover 2 is installed on the valve body 1. The valve stem 3 passes through the valve cover 2 and is rotatably connected thereto. At the bottom end of the valve stem 3, there is a valve flap 9. The valve flap 9 is designed in a T-shaped structure. The valve flap 9 cooperates with the sealing port 10. The valve flap 9 is used to close and open the sealing port 10. By using the up and down movement of the valve stem 3 in the valve cover 2, the valve flap 9 can be driven to move upward or downward, thereby sealing or opening the sealing port 10 to realize the flow or blockage of the fluid by the valve body 1. A clamping assembly is relatively embedded on the valve flap 9. The clamping assembly includes a housing 17 embedded in the valve flap 9, a clamping block 15 and a return spring 18. The housing 17 is horizontally embedded in the valve flap 9 and is located at the lower part of the valve flap 9. The cross section of the clamping block 15 is in a triangular structure. The largest surface of the clamping block 15 is attached to the sealing port 10, which can effectively weaken the impact of the fluid on the clamping block 15. A piston 16 slidably connected thereto is arranged in the housing 17. One end of the clamping block 15 is fixed on the piston 16. The other end of the clamping block 15 can sequentially pass through the housing 17 and the valve flap 9. The return spring 18 is sleeved outside the clamping block 15, and its two ends are respectively connected to the piston 16 and the housing 17. After the piston 16 is subjected to an external force, the piston 16 drives the clamping block 15 to move against the elastic force of the return spring 18. The clamping block 15 passes through the housing 17 and the valve flap 9. Through the mutual cooperation between the upper part of the T-shaped valve flap 9 and the clamping block 15, the sealing port 10 inside the valve body 1 can be effectively sealed. Moreover, it can effectively avoid the situation that the valve flap 9 vibrates and becomes loose due to the fluid pressure applied on the valve flap 9, which is likely to cause fluid leakage.

[0030] Channels are opened on both the valve stem 3 and the valve flap 9. The channel on the valve stem 3 is communicated with the channel on the valve flap 9. The inflation device is connected to the housing 17 through an inflation pipe 7 embedded in the channel. The inflation device conveys gas into the interior of the housing 17 through the inflation pipe 7. Due to the continuous gas conveyance, the air pressure inside the housing 17 gradually increases, and the air pressure gradually pushes the piston 16 to move inside the housing 17.

[0031] Specifically, the inflation device includes an inflation pump 19 and a controller. The inflation pump 19 is connected to the housing 17 through an inflation pipe 7. An exhaust shunt pipe 21 is connected to the inflation pipe 7. An intake solenoid valve 20 and an exhaust solenoid valve 22 are respectively provided on the inflation pipe 7 and the exhaust shunt pipe 21. The controller is respectively connected to the inflation pump 19, the intake solenoid valve 20 and the exhaust solenoid valve 22. The controller is used to control the start and stop of the inflation pump 19, the intake solenoid valve 20 and the exhaust solenoid valve 22. The controller sends execution instructions to the inflation pump 19, the intake solenoid valve 20 and the exhaust solenoid valve 22. When inflating, the inflation pump 19 starts, the intake solenoid valve 20 opens, and the exhaust solenoid valve 22 closes. The inflation pump 19 conveys gas to the housing 17 through the inflation pipe 7. When deflating, the exhaust solenoid valve 22 opens, and the gas in the housing 17 is discharged from the inflation pipe 7 and the exhaust shunt pipe 21, and can be reused.

[0032] Specifically, a runner 4 is provided at the top end of the valve stem 3. The valve stem 3 can be conveniently rotated through the runner 4, and the operation is convenient, time-saving and labor-saving.

[0033] Specifically, a left connecting flange 5 and a right connecting flange 6 are respectively arranged on both sides of the valve body 1. Both sides of the valve body 1 are connected to the pipeline through the left connecting flange 5 and the right connecting flange 6. By adding the left connecting flange 5 and the right connecting flange 6, the connection stability between the valve body 1 and the pipeline can be greatly improved.

[0034] Specifically, a scale line 25 and a number of uniformly arranged locking grooves 23 are provided on the valve stem 3. The depth of the downward movement of the valve stem 3 can be conveniently known through the scale line 25.

[0035] Specifically, a cavity 8, a left horizontal locking assembly and a right horizontal locking assembly are embedded in the valve cover 2. The cavity 8 is in a long strip structure and is located in the middle of the valve cover 2. The valve stem 3 passes vertically through the cavity 8. A vertical locking assembly for clamping the valve stem 3 is provided inside the cavity 8. The left horizontal locking assembly and the right horizontal locking assembly are respectively communicated with the cavity 8, and the left horizontal locking assembly and the right horizontal locking assembly are respectively engaged with the locking grooves 23 on the valve stem 3. When the valve stem 3 drives the valve flap 9 to closely adhere to the sealing port 10, through the mutual cooperation of the left horizontal locking assembly, the right horizontal locking assembly and the vertical locking assembly, the valve stem 3 can be limited in the vertical and horizontal directions, preventing it from vibrating and rotating due to the impact of the medium fluid, and even preventing fluid leakage.

[0036] Specifically, the vertical locking assembly includes a shock-absorbing block 14 and a compression spring 13. The shock-absorbing block 14 is provided on the valve stem 3 and located inside the cavity 8. The shock-absorbing block 14 is connected to the bottom of the cavity 8 through the compression spring 13. The compression spring 13 is sleeved outside the valve stem 3. An internal thread is provided on the outside of the shock-absorbing block 14, and the internal thread is matched with the external thread provided on the lower part of the cavity 8. When closing the valve, the valve stem 3 drives the valve flap 9 to move downward, so that the valve flap 9 closely adheres to the sealing port 10. At the same time, the valve stem 3 drives the shock-absorbing block 14 to move downward inside the cavity 8. The shock-absorbing block 14 presses the compression spring 13 downward, making the compression spring 13 in a compressed state. The compression spring 13 exerts a reverse acting force on the valve stem 3 through the shock-absorbing block 14, which can further reduce the vibration of the valve stem 3 caused by the impact of the medium fluid on it, thereby preventing the valve stem 3 and the valve flap 9 from becoming loose and avoiding fluid leakage.

[0037] Specifically, both the left horizontal locking assembly and the right horizontal locking assembly include a box body 28, a locking block 15, a movable rod 26 and a number of compression springs 30. A through hole 34 is provided at the left end of the box body 28, and the through hole 34 communicates with the cavity 8. A slide plate 27, a left fixing block 35 and a right fixing block 31 are provided inside the box body 28. The left fixing block 35 and the right fixing block 31 are arranged oppositely and located on the left side of the slide plate 27. Both sides of the slide plate 27 are connected to the left fixing block 35 and the right fixing block 31 through the compression springs 30 respectively. A support rod 29 is provided in the middle on the left side of the slide plate 27. The locking block 15 is provided at the end of the support rod 29 and corresponds to the through hole 34. The locking block 15 corresponds to the locking groove 23. One end of the movable rod 26 is horizontally arranged in the middle on the right side of the slide plate 27, and the other end thereof passes through the right end of the box body 28 and the valve cover 2 and is slidably connected thereto. Moreover, a button 24 is provided at the other end of the movable rod 26. When the valve stem 3 drives the valve flap 9 to closely adhere to the sealing port 10, press the button 24 inwardly with force, so that the button 24 drives the movable rod 26 to move inwardly. The movable rod 26 drives the slide plate 27 to move leftward inside the box body 28. The slide plate overcomes the elastic force of the compression springs 30 on both sides thereof and drives the support rod 29 in the middle on its left side to move leftward. Furthermore, the support rod 29 drives the locking block 15 to pass through the through hole 34 and engage with the locking groove 23 on the valve stem 3, so as to limit the left and right sides of the valve stem 3, and avoid the valve stem 3 and the valve flap 9 being impacted by the medium fluid, resulting in wear between the valve flap 9 and the sealing port 10, causing its sealing performance to be not tight and fluid leakage, which affects the service life of the valve.

[0038] Specifically, both the locking block 15 and the locking groove 23 are designed as tapered structures. The locking block 15 and the locking groove 23 are matched with each other. When the locking block 15 is subjected to an external force and is embedded in the locking groove 23 on the valve stem 3, it can limit the valve stem 3 and prevent it from shaking left and right.

[0039] Specifically, telescopic rods 33 are respectively arranged between the skateboard 27 and the right fixing block 31 and the left fixing block 35. The telescopic rods 33 are located inside the compression spring 30, effectively preventing the compression spring 30 from shifting in position due to the extrusion force of the skateboard 27 and enhancing the stability of the compression spring 30 during use.

[0040] The working principle of the present invention is as follows:

[0041] When the valve is closed, by rotating the runner 4, the runner 4 drives the valve stem 3 to move downward through the valve cover 2. The valve stem 3 drives the valve flap 9 fixed at the bottom to move downward until the valve flap 9 fits on the sealing port 10 inside the valve. At this time, the top (protrusion) of the T-shaped valve flap 9 closely fits on the upper surface of the sealing port 10. Then, the controller sends execution instructions to the air pump 19, the intake electromagnetic valve 20, and the exhaust electromagnetic valve 22. The air pump 19 is started, the intake electromagnetic valve 20 is opened, and the exhaust electromagnetic valve 22 is closed. The air pump 19 conveys gas into the interior of the housing 17 through the air charging pipe 7. Due to the continuous supply of gas, the gas pressure inside the housing 17 gradually increases. The gas pressure is used to push the piston 16 to move inside the housing 17. The piston 16 gradually moves outward. Furthermore, the piston 16 overcomes the elastic force of the return spring 18 and drives the clamping block 15 to move outward. The clamping block 15 successively passes through the housing 17 and the valve flap 9. The clamping block 15 can closely fit on the lower surface of the sealing port 10. Through the mutual cooperation of the clamping block 15 of the clamping assembly and the top (protrusion) of the valve flap 9, the valve flap 9 can closely fit on the sealing port 10, effectively reducing the fluid impact on the valve flap 9, preventing wear of the valve flap 9 and the sealing port 10, poor sealing performance, and easy leakage of the fluid due to insecure sealing between the valve flap 9 and the sealing port 10. At the same time, it effectively avoids the vibration of the valve flap 9 caused by the fluid pressure, thereby preventing the phenomenon of self-rotation of the valve stem 3, with better use effect and extended service life of the valve body 1.

[0042] When the valve is opened, the controller sends execution instructions to the exhaust electromagnetic valve 22. The exhaust electromagnetic valve 22 is opened. The gas inside the housing 17 is discharged from the air charging pipe 7 and the exhaust shunt pipe 21, causing the gas pressure inside the housing 17 to gradually decrease. Under the elastic force of the return spring 18, the return spring 18 drives the piston 16 to move inside the housing 17. The piston 16 gradually moves inward. Furthermore, the piston 16 drives the clamping block 15 to move inward until the clamping block 15 is completely accommodated inside the housing 17 and the valve flap 9, without affecting the opening of the valve flap 9 and the next use. This device can effectively overcome the problems existing in the existing valves during use, such as large wear degree between the valve flap 9 and the sealing port 10, easy fluid leakage, poor sealing performance, affecting the normal use of the valve, shortening its service life, and increasing maintenance costs.

[0043] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A high-sealing valve device for the conventional island of a nuclear power plant, Characterized in that: It includes a valve body, a valve cover, a valve stem and an inflation device. On both sides inside the valve body, there are an inlet and an outlet. The inlet is communicated with the outlet through a sealing port. The valve cover is installed on the valve body. The valve stem passes through the valve cover and is rotatably connected thereto. At the bottom end of the valve stem, there is a T-shaped valve flap for closing and opening the sealing port. Relatively embedded on the valve flap are clamping components. The clamping components include a housing embedded in the valve flap, a clamping block with a triangular cross-section and a return spring. The housing is located at the lower part of the valve flap. Inside the housing, there is a piston slidably connected thereto. One end of the clamping block is fixed on the piston. The other end of the clamping block can sequentially pass through the housing and the valve flap. The return spring is sleeved outside the clamping block, and its two ends are respectively connected to the piston and the housing. Channels are opened on both the valve stem and the valve flap. The inflation device is connected to the housing through an inflation pipe embedded in the channel. At the top end of the valve stem, there is a runner. The inflation device includes an air pump and a controller. The air pump is connected to the housing through an inflation pipe. An exhaust shunt pipe is connected to the inflation pipe. An intake solenoid valve and an exhaust solenoid valve are respectively provided on the inflation pipe and the exhaust shunt pipe. The controller is respectively connected to the air pump, the intake solenoid valve and the exhaust solenoid valve; When the T-shaped valve flap closes the sealing port, the top of the T-shaped valve flap closely fits on the upper surface of the sealing port. The controller controls the air pump to start, the intake solenoid valve to open, and the exhaust solenoid valve to close. The air pump conveys gas into the housing through the inflation pipe. The gas pressure is used to push the piston to move inside the housing. The piston overcomes the elastic force of the return spring and drives the clamping block to move outwards. The clamping block sequentially passes through the housing and the valve flap until the clamping block closely fits on the lower surface of the sealing port.

2. The high-sealing valve device for the conventional island of a nuclear power plant according to claim 1, Characterized in that: Left and right connection flanges are respectively arranged on both sides of the valve body.

3. The high-sealing valve device for the conventional island of a nuclear power plant according to claim 1, Characterized in that: Scale lines and a number of uniformly arranged locking grooves are provided on the valve stem.

4. The high-sealing valve device for the conventional island of a nuclear power plant according to claim 3, Characterized in that: A cavity, a left horizontal locking component and a right horizontal locking component are embedded in the valve cover. The cavity has a long strip-shaped structure and is located in the middle of the valve cover. The valve stem vertically passes through the cavity. Inside the cavity, there is a vertical locking component for clamping the valve stem. The left horizontal locking component and the right horizontal locking component are respectively communicated with the cavity. The left horizontal locking component and the right horizontal locking component are respectively engaged with the locking grooves on the valve stem.

5. The high-sealing valve device for the conventional island of a nuclear power plant according to claim 4, Characterized in that: The vertical locking assembly includes a shock-absorbing block and a compression spring. The shock-absorbing block is provided on the valve stem and inside the cavity. The shock-absorbing block is connected to the bottom of the cavity through the compression spring. The compression spring is sleeved on the outside of the valve stem. An internal thread is provided on the outside of the shock-absorbing block, and the internal thread is matched with the external thread provided on the lower part of the cavity.

6. A high-sealing valve device for a nuclear power plant conventional island according to claim 4, characterized in that: Both the left lateral locking assembly and the right lateral locking assembly include a box body, a locking block, a movable rod and a plurality of compression springs. A through hole is provided at the left end of the box body, and the through hole communicates with the cavity. A slide plate, a left fixed block and a right fixed block are provided inside the box body. The left fixed block and the right fixed block are arranged oppositely and are located on the left side of the slide plate. Both sides of the slide plate are connected to the left fixed block and the right fixed block through compression springs respectively. A support rod is provided in the middle on the left side of the slide plate. The locking block is provided at the end of the support rod and corresponds to the through hole. The locking block corresponds to the locking groove. One end of the movable rod is horizontally arranged in the middle on the right side of the slide plate, and the other end thereof passes through the right end of the box body and the valve cover and is slidably connected thereto.

7. A high-sealing valve device for a nuclear power plant conventional island according to claim 6, characterized in that: Both the locking block and the locking groove are designed as conical structures.

8. A high-sealing valve device for a nuclear power plant conventional island according to claim 6, characterized in that: Expansion rods are respectively provided between the slide plate and the right fixed block and the left fixed block, and the expansion rods are located inside the compression springs.

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