A nuclear power plant conventional island valve fault monitoring device

Abstract

The present application relates to a kind of nuclear power plant conventional island valve fault monitoring device, including valve body, valve cover and valve core, the two sides in valve body inside are respectively equipped with import and export, the import of valve body is equipped with fixed ring, filter screen and monitoring assembly are equipped in fixed ring, monitoring assembly includes box, distance sensor, support rod, single-chip microcomputer and alarm, piston is equipped in box, distance measuring ball is equipped on the right side of piston, distance measuring ball corresponds with distance sensor, support rod right end transversely passes through the top of box and is connected with the left side of piston, support rod right end is connected with the edge of filter screen, the both ends of elastic member are fixedly connected with the top of box and filter screen, distance sensor is connected with single-chip microcomputer, single-chip microcomputer is connected with alarm.The present application effectively solves the existing nuclear power plant valve inside occurs blockage unable to send warning in time, staff cannot take corresponding measures in time, lead to serious accident, unable to meet the use demand of nuclear power plant and other problems.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant valve technology, and in particular to a fault monitoring device for conventional island valves in nuclear power plants. Background Technology

[0002] Valves are control components in fluid transport systems, possessing functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow diversion, and pressure relief. Valves used in fluid control systems range from the simplest shut-off valves to the various valves used in highly complex automated control systems, with a wide variety of types and specifications. Valves can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media.

[0003] Currently, when existing nuclear power plant valves are in use, blockages occur inside the valves, preventing real-time monitoring and alarm functions for fluids. This results in the inability of staff to take appropriate measures based on the degree of blockage, leading to serious accidents and failing to meet the operational requirements of nuclear power plants. Summary of the Invention

[0004] The purpose of this invention is to provide a fault monitoring device for conventional island valves in nuclear power plants, addressing the shortcomings of existing technologies. Through the coordinated design of the valve body, valve cover, valve core, fixed ring, filter screen plate, and monitoring components, it effectively solves the problems of existing nuclear power plant valves failing to issue alarms in a timely manner when blockages occur, preventing staff from taking timely measures, leading to serious accidents, and failing to meet the usage requirements of nuclear power plants.

[0005] The technical solution adopted in this invention:

[0006] A valve fault monitoring device for the conventional island of a nuclear power plant includes a valve body, a valve cover, and a valve core. The valve body has an inlet and an outlet on its two sides, with a sealing port between them. The valve cover is mounted on the top of the valve body and has a valve stem threadedly connected to it. The valve core is located at the bottom of the valve stem and mates with the sealing port. A circular fixed ring is located at the inlet of the valve body. Inside the fixed ring is a filter screen plate that can slide back and forth and several monitoring components. The monitoring components include a housing, a distance sensor, a support rod, a microcontroller, and an alarm. The housing is mounted on the inner wall of the fixed ring and has a piston slidably connected to it. A distance measuring ball is located on the right side of the piston, corresponding to the distance sensor located at the bottom of the housing. The right end of the support rod passes laterally through the top of the housing and is fixedly connected to the left side of the piston. The right end of the support rod is fixedly connected to the edge of the filter screen plate, and an elastic element is sleeved on the support rod. The two ends of the elastic element are fixedly connected to the top of the housing and the filter screen plate, respectively. The distance sensor is connected to the microcontroller, and the microcontroller is connected to the alarm located on the valve body.

[0007] Furthermore, the alarm includes a buzzer and an LED flashing light, both of which are mounted on the valve body and are respectively connected to the output signal of the controller.

[0008] Furthermore, the valve stem is provided with a rotary wheel.

[0009] Furthermore, the elastic element is a return spring, and the two ends of the return spring are fixedly connected to the top of the box and the filter screen plate, respectively.

[0010] Furthermore, the filter screen plate is provided with a plurality of filter holes arranged evenly.

[0011] Furthermore, the outer peripheral edge of the filter screen plate is provided with several flow guiding components, which are arranged in a circle with the center line of the fixed ring as the center.

[0012] Furthermore, the flow guiding assembly includes a left cavity, a right cavity, a middle cavity, a compression spring, and a squeeze spring. The left cavity, right cavity, and middle cavity are respectively embedded in the outer periphery of the filter screen plate. The middle part of the left cavity is connected to the right cavity through the middle cavity. A movable block is slidably connected to the left cavity. A guide block is provided on the top of the movable block, and a left rack is provided on the bottom of the movable block. The bottom end of the left rack is connected to the bottom of the left cavity through the compression spring. A fixed block and a right rack are provided inside the middle cavity. The right rack passes through the fixed block. An impact plate is provided on the top of the right rack, and the bottom end of the right rack is connected to the bottom of the right cavity through the squeeze spring. A gear is provided inside the middle cavity. The two sides of the gear mesh with the left rack and the right rack, respectively. A rotating shaft is provided in the middle of the gear, and the two ends of the rotating shaft are fixed to the inner wall of the middle cavity.

[0013] Furthermore, the cross-section of the guide block is a right-angled triangular structure.

[0014] Furthermore, the filter screen plate is provided with grooves that cooperate with the impact plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention has a simple structure and is easy to use. Through the coordinated design of valve body, valve cover, valve core, fixed ring, filter screen plate and monitoring components, it effectively solves the problems of existing nuclear power plant valves failing to issue alarms in time when blockage occurs, and the inability of staff to take corresponding measures in time, resulting in serious accidents and failing to meet the usage requirements of nuclear power plants.

[0017] 2. Through the cooperation of the housing and piston, the ranging ball and distance sensor can be sealed inside the housing. The distance sensor monitors the position of the ranging ball in real time. The housing and piston prevent fluid from affecting the measurement results of the distance sensor, reduce interference, and ensure the accuracy of the distance sensor measurement results.

[0018] 3. This invention can issue an alarm in a timely manner when blockage occurs inside the valve, and can alert surrounding personnel so that the blockage can be dealt with in a timely manner, effectively preventing accidents from occurring. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the fixing ring of the present invention. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the structure of the fixing ring of the present invention. Figure 2 ;

[0022] Figure 4 This is a cross-sectional view of the fixing ring of the present invention;

[0023] Figure 5 This is a schematic diagram of the internal structure of the box body of the present invention;

[0024] Figure 6 This is the circuit schematic diagram of the present invention;

[0025] Figure 7 This is a state diagram of the flow guiding component of the present invention;

[0026] Figure 8 This is a cross-sectional view of the filter screen plate of the present invention;

[0027] Figure 9 for Figure 8 Enlarged view of point A in the middle;

[0028] In the diagram: 1. Rotary wheel; 2. Valve stem; 3. Valve cover; 4. Valve core; 5. Valve body; 6. Buzzer; 7. LED flashing light; 8. Outlet; 9. Sealing port; 10. Box body; 11. Inlet; 12. Fixing ring; 13. Return spring; 14. Filter screen plate; 15. Support rod; 16. Piston; 17. Distance measuring ball; 18. Distance sensor; 19. Filter hole; 20. Impact plate; 21. Guide block; 22. Moving block; 23. Right rack; 24. Right cavity; 25. Compression spring; 26. Gear; 27. Intermediate cavity; 28. Compression spring; 29. ​​Rotating shaft; 30. Left cavity; 31. Left rack; 32. Fixing block. Detailed Implementation

[0029] To better understand the technical content of this invention, specific embodiments are provided below, and the invention will be further described in conjunction with the accompanying drawings.

[0030] See Figures 1 to 9This invention provides a valve fault monitoring device for the conventional island of a nuclear power plant, comprising a valve body 5, a valve cover 3, and a valve core 4. The valve body 5 has an inlet 11 and an outlet 8 on both sides inside, with a sealing port 9 between the inlet 11 and the outlet 8. Fluid flows in from the inlet 11 inside the valve body 5, passes through the sealing port 9, and finally exits through the outlet 8. The valve cover 3 is mounted on the top of the valve body 5 and has a valve stem 2 threadedly connected to it. The valve core 4 is located at the bottom end of the valve stem 2 and engages with the sealing port 9. By rotating the valve stem 2, the valve stem 2 moves on the valve cover 3, causing the valve core 4 to move up and down, thus opening or closing the sealing port 9 and achieving valve opening or closing. A circular fixing ring 12 is provided at the inlet 11 of the valve body 5. The device 2 contains a filter screen 14 that can slide back and forth inside, and several monitoring components. The filter screen 14 filters solid particulate impurities from the fluid. The fluid passes through the filter screen 14 and impacts it, thus filtering out solid particulate impurities. There are four monitoring components, which are evenly distributed in a circle around the center of the fixed ring 12. The monitoring components include a housing 10, a distance sensor 18, a support rod 15, a microcontroller, and an alarm. The housing 10 is mounted on the inner wall of the fixed ring 12. A piston 16 is provided inside the housing 10, which can slide back and forth inside the housing 10. A distance measuring ball 17 is provided on the right side of the piston 16. The distance measuring ball 17 and the distance sensor 18 are located at the bottom of the housing 10. Corresponding to sensor 18, distance sensor 18 is activated to monitor the position of distance measuring ball 17 in real time. The right end of support rod 15 passes horizontally through the top of box 10 and is fixedly connected to the left side of piston 16. Under the action of external force, support rod 15 drives piston 16 to move left and right inside box 10. The right end of support rod 15 is fixedly connected to the edge of filter screen plate 14, and an elastic element is sleeved on support rod 15. The two ends of the elastic element are fixedly connected to the top of box 10 and filter screen plate 14, respectively. Filter screen plate 14 is impacted by fluid and slides backward along fixed ring 12. In turn, filter screen plate 14 overcomes the elastic force of return spring 13 and drives support rod 15 to move backward as well. Since the two ends of support rod 15 are fixedly connected to the filter screen plate 14, the support rod 15 moves backward as well. Plate 14 is connected to piston 16 located inside housing 10. As support rod 15 moves backward, its right end drives piston 16 to slide to the right along the inner wall of housing 10. This causes piston 16 to move distance measuring ball 17 closer to distance sensor 18. Distance sensor 18 is connected to a microcontroller, which in turn is connected to an alarm mounted on valve body 5. Each distance sensor 18 monitors the position of its corresponding distance measuring ball 17 in real time and sends the signal to the microcontroller. The microcontroller performs comprehensive calculations and automatically detects the degree of blockage inside the valve. When the distance value detected by distance sensor 18 exceeds a preset threshold by the microcontroller, the microcontroller sends an instruction to the alarm, which promptly issues an alarm.This allows nearby maintenance personnel to perform timely repairs, thereby preventing accidents and improving safety.

[0031] Specifically, the alarm includes a buzzer 6 and an LED flashing light 7, both of which are mounted on the valve body 5. The buzzer 6 and the LED flashing light 7 are respectively connected to the output signal of the controller. When the valve becomes clogged, fluid accumulates at the inlet 11 inside the valve body 5. The fluid passes through the filter screen plate 14, making the fluid pressure on both sides of the filter screen plate 14 nearly equal. Since the filter screen plate 14 is connected to the housing 10 via the return spring 13, the spring force of the return spring 13 moves the filter screen plate 14 towards its initial position. At this time, the distance sensor 18 monitors the position of the distance measuring ball 17 in real time. By detecting the position of the distance measuring ball 17, the degree of blockage inside the valve is determined. When the valve is in use, if the return spring 13 moves the filter screen plate 14 to a position close to the initial position, it indicates that the valve is severely clogged. If the return spring 13 does not move the filter screen plate 14 to the initial position, it indicates that the valve is only slightly clogged. If the valve is only slightly clogged, the microcontroller sends a start command to the LED flashing light 7, and the LED flashing light 7 flashes. If the valve is severely clogged, the microcontroller sends a start command to the buzzer 6, and the buzzer 6 sounds an alarm to alert nearby personnel that the valve is severely clogged and needs to be cleaned promptly.

[0032] Specifically, the valve stem 2 is equipped with a rotating wheel 1. By rotating the valve stem 2 through the rotating wheel 1, the valve stem 2 drives the valve core 4 fixed at its bottom end to move up and down, so as to seal or open the sealing port 9 inside the valve, thereby realizing the closure or opening of the valve.

[0033] Specifically, the elastic element is a return spring 13, with its two ends fixedly connected to the top of the housing 10 and the filter screen plate 14, respectively. When the filter screen plate 14 is impacted by the fluid inside the valve, it slides backward along the fixed ring 12, and the filter screen plate 14 overcomes the elastic force of the return spring 13 to drive the support rod 15 to move.

[0034] Specifically, the filter screen plate 14 is provided with a plurality of filter holes 19 evenly arranged. The filter holes 19 on the filter screen plate 14 are used to filter particulate impurities in the fluid.

[0035] Specifically, the outer periphery of the filter screen plate 14 is provided with several flow guiding components, which are arranged in a circle around the center line of the fixed ring 12. The flow guiding components can effectively guide the fluid at the outer edge of the filter screen plate 14 to the middle of the filter screen plate 14, preventing the gap between the filter screen plate 14 and the fixed ring 12 from becoming blocked.

[0036] Specifically, the flow guiding assembly includes a left cavity 30, a right cavity 24, a middle cavity 27, a compression spring 25, and a squeezing spring 28. The left cavity 30, right cavity 24, and middle cavity 27 are respectively embedded in the outer periphery of the filter screen plate 14. The middle part of the left cavity 30 is connected to the right cavity 24 through the middle cavity 27. A movable block 22 is provided inside the left cavity 30 and is slidably connected thereto. A guide block 21 is provided on the top of the movable block 22, and a left rack 31 is provided on the bottom of the movable block 22. The bottom end of the left rack 31 is connected to the compression spring. 25 is connected to the bottom of the left cavity 30. The middle cavity 27 is provided with a fixing block 32 and a right rack 23. The right rack 23 passes through the fixing block 32. An impact plate 20 is provided on the top of the right rack 23. The bottom of the right rack 23 is connected to the bottom of the right cavity 24 through a compression spring 28. The middle cavity 27 is provided with a gear 26. The two sides of the gear 26 mesh with the left rack 31 and the right rack 23 respectively. A rotating shaft 29 is provided in the middle of the gear 26. The two ends of the rotating shaft 29 are fixed to the inner wall of the middle cavity 27 respectively. The right cavity 24 is close to the outer edge of the filter screen plate 14, and the left cavity 30 is far away from the outer edge of the filter screen plate 14. The fluid in the valve body 5 impacts the impact plate 20, causing the impact plate 20 to gradually move closer to the filter screen plate 14. The impact plate 20 drives the left rack 31 to move inside the left cavity 30. While moving, the left rack 31 overcomes the elastic force of the compression spring 28. The left rack 31 drives the gear 26 to rotate in the middle cavity 27. The gear 26 drives the right rack 23 to move upward. The right rack 23 moves in the opposite direction to the left rack 31. The right rack 23 drives the guide block 21 to move upward through the moving block 22, so that the fluid between the filter screen plate 14 and the fixed ring 12 can flow along the guide block 21 toward the middle of the filter screen plate 14. This effectively avoids blockage between the fixed ring 12 and the filter screen plate 14, which would affect the normal movement of the filter screen plate 14 within the fixed ring 12.

[0037] Specifically, the cross-section of the guide block 21 is a right-angled triangle structure. The hypotenuse of the guide block 21 faces the middle of the filter screen plate 14. When the fluid comes into contact with the guide block 21, it flows along its hypotenuse toward the middle. The guide block 21 has the function of guiding and diverting the fluid at the outer periphery of the filter screen plate 14.

[0038] Specifically, the filter screen plate 14 is provided with a groove, which cooperates with the impact plate 20. When the impact plate 20 is impacted by the fluid, it moves toward the filter screen plate 14 and is embedded in the groove, so as to avoid affecting the flow of fluid on the filter screen plate 14.

[0039] The working principle of this invention is as follows:

[0040] When the valve is in use, the distance sensor 18 and the microcontroller are activated, the valve core 4 moves away from the sealing port 9, and the fluid flows in from the inlet 11 inside the valve body 5, flows through the sealing port 9, and is discharged through the outlet 8. The fluid passes through the filter screen plate 14 and is continuously impacted by it. The filter screen plate 14 is used to filter solid particulate impurities in the fluid, and the continuous impact of the fluid on it can effectively wash away solid particulate impurities adhering to its surface, preventing fixed particulate impurities from adhering to it and easily causing blockage, so that the filtration efficiency and effect of the filter screen plate 14 are better.

[0041] The fluid acts on the filter screen plate 14, which slides along the inner wall of the fixed ring 12. The filter screen plate 14 overcomes the elastic force of the return spring 13 and drives the support rod 15 to move to the right. Then, the right end of the support rod 15 drives the piston 16 to move along the inner wall of the box 10. The piston 16 drives the ranging ball 17 to move towards the distance sensor 18. Each distance sensor 18 monitors the position of the ranging ball 17 in real time and sends the distance data to the microcontroller. After comprehensive calculation, if the distance value detected by the distance sensor 18 is less than the preset threshold, the microcontroller will not activate the alarm.

[0042] If the valve becomes blocked, the fluid pressure at the inlet 11 inside the valve body 5 increases. If the blockage is severe, the fluid cannot flow through the valve's sealing port 9. At this time, the fluid pressure on the left side of the filter screen plate 14 is slightly greater than that on the right side, and the fluid pressure on both sides of the filter screen plate 14 is the same. Since the filter screen plate 14 is connected to the housing 10 through the return spring 13, the spring force of the return spring 13 moves the filter screen plate 14 towards its initial position. The filter screen plate 14 returns to a position close to its initial position, and the support rod 15 also drives the piston 16 to move to the left. At this time, the distance sensor 18 monitors the position of the ranging ball 17 in real time. Both the filter screen plate 14 and the ranging ball 17 return to their original positions. The distance sensor 18 detects a value greater than the threshold preset by the microcontroller. The microcontroller sends an execution command to the buzzer 6, and the buzzer 6 sounds an alarm to alert maintenance personnel that the valve has malfunctioned. Severe blockage requires timely repair to prevent accidents. However, minor blockage allows some fluid to flow smoothly through the valve, resulting in a pressure difference on both sides of the filter screen 14 (i.e., the fluid pressure on the left side of the filter screen 14 is much greater than the pressure on the right side). In this case, the return spring 13 moves the filter screen 14 to the left, which in turn causes the support rod 15 to move the piston 16 to the left along the inside of the housing 10. The filter screen 14 and the ranging ball 17 move to the left respectively. The distance sensor 18 sends the position of the ranging ball 17 to the microcontroller. After comprehensive calculation, the microcontroller sends the execution command to the LED flashing light 7, which flashes to alert nearby personnel that the valve is slightly blocked and needs timely cleaning. The system automatically detects the degree of blockage inside the valve and issues relevant alarms to alert personnel, facilitating timely handling and preventing accidents.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A nuclear power plant conventional island valve failure monitoring device, comprising a valve body, a valve cover and a valve core, the valve body is provided with an inlet and an outlet on both sides inside, a sealing port is arranged between the inlet and the outlet, the valve cover is installed on the top of the valve body, a valve stem is arranged on the valve cover and connected with a thread, the valve core is arranged on the bottom end of the valve stem and matched with the sealing port, characterized in that: The valve body has a circular fixed ring at its inlet. Inside the fixed ring is a filter screen plate that can slide back and forth and several monitoring components. The monitoring components include a housing, a distance sensor, a support rod, a microcontroller, and an alarm. The housing is installed on the inner wall of the fixed ring. Inside the housing is a piston that is slidably connected to it. A distance measuring ball is located on the right side of the piston. The distance measuring ball corresponds to the distance sensor located at the bottom of the housing. The right end of the support rod passes horizontally through the top of the housing and is fixedly connected to the left side of the piston. The right end of the support rod is fixedly connected to the edge of the filter screen plate. An elastic element is sleeved on the support rod. The two ends of the elastic element are fixedly connected to the top of the housing and the filter screen plate, respectively. The distance sensor is connected to the microcontroller. The microcontroller is connected to the alarm located on the valve body. ​ The outer periphery of the filter screen plate is provided with several flow guiding components, which are arranged in a circle with the center line of the fixed ring as the center.

2. The valve fault monitoring device for the conventional island of a nuclear power plant according to claim 1, characterized in that: The alarm includes a buzzer and an LED flashing light, both of which are mounted on the valve body and are connected to the output signal of the controller.

3. The valve fault monitoring device for the conventional island of a nuclear power plant according to claim 1, characterized in that: The valve stem is equipped with a rotary wheel.

4. The valve fault monitoring device for the conventional island of a nuclear power plant according to claim 1, characterized in that: The elastic element is a reset spring, and the two ends of the reset spring are fixedly connected to the top of the box and the filter screen plate, respectively.

5. The valve fault monitoring device for the conventional island of a nuclear power plant according to claim 1, characterized in that: The filter screen plate has a number of filter holes arranged evenly.

6. The valve fault monitoring device for the conventional island of a nuclear power plant according to claim 1, characterized in that: The flow guiding assembly includes a left cavity, a right cavity, a middle cavity, a compression spring, and a squeeze spring. The left cavity, right cavity, and middle cavity are respectively embedded in the outer periphery of the filter screen plate. The middle part of the left cavity is connected to the right cavity through the middle cavity. A movable block is slidably connected to the left cavity. A guide block is provided on the top of the movable block. A left rack is provided on the bottom of the movable block. The bottom end of the left rack is connected to the bottom of the left cavity through the compression spring. A fixed block and a right rack are provided inside the middle cavity. The right rack passes through the fixed block. An impact plate is provided on the top of the right rack. The bottom end of the right rack is connected to the bottom of the right cavity through the squeeze spring. A gear is provided inside the middle cavity. The two sides of the gear mesh with the left rack and the right rack, respectively. A rotating shaft is provided in the middle of the gear. The two ends of the rotating shaft are fixed to the inner wall of the middle cavity.

7. A valve fault monitoring device for a conventional island in a nuclear power plant according to claim 6, characterized in that: The cross-section of the guide block is a right-angled triangle structure.

8. A valve fault monitoring device for a conventional island in a nuclear power plant according to claim 7, characterized in that: The filter screen plate is provided with grooves that cooperate with the impact plate.

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