A cleaning device for a reactor vessel head

Abstract

The present application relates to reactor pressure vessel technical field, specifically for a kind of cleaning device for reactor pressure vessel top cover;Including support upper end is fixed with support plate, rotating lever outer surface is fixed with receiving support and water jet pipe, receiving support is equipped with two groups, two groups of receiving support inside respectively movably provided with upper telescopic support and lower telescopic support, upper telescopic support inside movably provided with scraper, lower telescopic support inside movably provided with gear, beneficial effect: rotating lever rotation will drive receiving support and water jet pipe rotation, water jet pipe will spray water inside sealing groove, since scraper and receiving support are telescopically connected, due to centrifugal force, scraper will move towards sealing groove inside, so that scraper is tightly attached to sealing groove inner wall, so that the water sprayed by water jet pipe and the foreign matter inside sealing groove are scraped, this cleaning assembly is automatically cleaned, and rotating rotating lever can quickly clean sealing groove multiple times, improve cleaning efficiency.

Description

Technical Field

[0001] This invention relates to the field of reactor pressure vessel technology, specifically to a cleaning device for the top cover of a reactor pressure vessel. Background Technology

[0002] A reactor is a device that can maintain and control a nuclear fission or nuclear fusion chain reaction, thereby enabling the utilization of nuclear energy.

[0003] In the existing technology, the reactor pressure vessel is an irreplaceable and important piece of equipment in a nuclear power plant. In order to ensure that it has sufficient sealing performance during operation, the nuclear power plant must open the reactor pressure vessel and inspect its sealing structure during major overhauls and refueling. The top cover sealing ring groove is an important component of the pressure vessel's sealing structure. After the reactor pressure vessel is opened, the top cover sealing ring groove must be cleaned and inspected. Cleaning removes boron crystals and residual silver and other foreign matter from the sealing ring groove, and the cleaned ring groove is then inspected.

[0004] However, in the existing cleaning of pressure vessel top covers, manual cleaning is often used. During cleaning, the top cover is placed on a support in the storage room with the annular groove facing down and the distance from the ground is small, which makes it inconvenient for personnel to operate and labor-intensive, resulting in low cleaning efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a cleaning device for the top cover of a reactor pressure vessel to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cleaning device for the top cover of a reactor pressure vessel, a bracket, a support plate fixed at the upper end of the bracket, a toothed ring fixed on the upper surface of the support plate, a top cover body provided at the upper end of the support plate, a support ring fixed at the end of the support plate, a guide rod movably engaged inside the support ring, and a roller and a spring movably sleeved on the outer surface of the guide rod;

[0007] The rotating rod has a storage bracket and a water spray pipe fixed on its outer surface. The storage bracket has two sets, and the upper telescopic bracket and the lower telescopic bracket are respectively movably installed inside the two sets of storage brackets. The upper telescopic bracket has a scraper movably installed inside, and the lower telescopic bracket has a gear movably installed inside.

[0008] Preferably, a motor is fixed at the lower end of the bracket, the rotating rod is located inside the bracket and connected to the output end of the motor, and a sealing groove is provided on the inner wall of the top cover body.

[0009] Preferably, the radius of the scraper is greater than the depth of the sealing groove, the roller is located on the outer surface of the guide rod between the two sets of support rings, and the spring is located on the outer surface of the guide rod on the side of the support plate.

[0010] Preferably, the inner wall of one set of the support rings is provided with a second annular groove, a third positioning groove and a fourth positioning groove. The second annular grooves are provided in two sets symmetrically distributed. The third positioning groove is connected to only one set of the second annular grooves. The fourth positioning groove is connected to both sets of the second annular grooves.

[0011] Preferably, the roller has a first positioning groove, a first annular groove and a second positioning groove inside, both of which are connected to the first annular groove, and the depth of the second positioning groove is less than the depth of the first positioning groove.

[0012] Preferably, a second positioning block and a first positioning block are fixed on the outer surface of the guide rod. The second positioning block corresponds to and is movably engaged with the second annular groove, the third positioning groove, and the fourth positioning groove. The first positioning block corresponds to and is movably engaged with the first positioning groove, the first annular groove, and the second positioning groove.

[0013] Preferably, the two sets of storage brackets are symmetrically distributed on the outer surface of the rotating rod. The upper telescopic bracket has a sleeve that is movably provided inside. The scraper is fixed to the end of the sleeve. The inner wall of the upper telescopic bracket has an arc-shaped groove. The outer surface of the sleeve has a positioning rod that is fixed. The positioning rod corresponds to the arc-shaped groove and is movably engaged.

[0014] Preferably, a transmission rod is movably provided inside the lower telescopic bracket, the gear is fixed to the bottom surface of the transmission rod, a limit groove is formed on the upper outer surface of the transmission rod, and a limit block is fixed to the inner wall of the sleeve.

[0015] Preferably, the transmission rod is movably disposed inside the sleeve at its upper end, the limiting groove corresponds to and is movably engaged with the limiting block, and the gear corresponds to and is movably engaged with the gear ring.

[0016] Preferably, the scraper corresponds to the sealing groove, the width of the sealing groove is greater than the thickness of the scraper, the toothed ring is fixed to the upper surface of the support plate inside the top cover body, and the roller is located on the upper surface of the support plate outside the top cover body.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The motor starts and drives the rotating rod to rotate, which in turn drives the storage bracket and the water spray pipe to rotate. The water spray pipe sprays water into the sealed groove. Because the scraper and the storage bracket are telescopically connected, the scraper moves into the sealed groove due to centrifugal force, making the sealed groove fit tightly against the inner wall. The scraper surface is fixed with bristles, which remove the water sprayed from the water pipe and foreign objects inside the sealed groove. This cleaning component is automatic, and the rotating rod can quickly clean the sealed groove multiple times, improving cleaning efficiency. Attached Figure Description

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

[0020] Figure 2 This is a three-dimensional schematic diagram of the main structure of the top cover of the present invention;

[0021] Figure 3 This is a three-dimensional schematic diagram of the cleaning component structure of the present invention;

[0022] Figure 4 This is a three-dimensional schematic diagram of the clamping component structure of the present invention;

[0023] Figure 5 This is an exploded three-dimensional cross-sectional view of the clamping component structure of the present invention;

[0024] Figure 6 This is an exploded three-dimensional schematic diagram of the cleaning component structure of the present invention;

[0025] Figure 7 This is an exploded three-dimensional schematic diagram of the rotating rod assembly structure of the present invention;

[0026] Figure 8 This is a three-dimensional schematic diagram of the scraper assembly structure of the present invention;

[0027] Figure 9 This is a cross-sectional exploded perspective view of the scraper assembly structure of the present invention;

[0028] Figure 10 This is a cross-sectional exploded perspective view of the scraper assembly structure of the present invention;

[0029] Figure 11 This is a cross-sectional exploded perspective view of the telescopic support assembly structure of the present invention.

[0030] In the diagram: 1. Top cover body; 2. Roller; 3. Motor; 4. Bracket; 5. Sealing groove; 6. Rotating rod; 7. Gear ring; 8. Support plate; 9. Guide rod; 10. Support ring; 11. Spring; 12. First positioning groove; 13. First annular groove; 14. Second positioning groove; 15. Second positioning block; 16. First positioning block; 17. Second annular groove; 18. Third positioning groove; 19. Fourth positioning groove; 20. Scraper; 21. Storage bracket; 22. Water spray pipe; 23. Upper telescopic bracket; 24. Gear; 25. Sleeve; 26. Lower telescopic bracket; 27. Transmission rod; 28. Limiting groove; 29. ​​Limiting block; 30. Positioning rod; 31. Arc groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0032] Please see Figures 1 to 11 The present invention provides a technical solution: a cleaning device for the top cover of a reactor pressure vessel.

[0033] Example 1: A cleaning device for the top cover of a reactor pressure vessel includes: a support plate 8 fixed to the upper end of a bracket 4, a toothed ring 7 fixed to the upper surface of the support plate 8, a top cover body 1 provided at the upper end of the support plate 8, a support ring 10 fixed to the end of the support plate 8, a guide rod 9 movably engaged inside the support ring 10, and a roller 2 and a spring 11 movably sleeved on the outer surface of the guide rod 9. The roller 2 positions the top cover body 1 to prevent the top cover body 1 from shifting position when placed on the support plate 8. Under the elasticity of the spring 11, the guide rod 9 will move back, and at the same time, the first positioning block 16 will be engaged in the second positioning groove 14, and the second positioning block 15 will be engaged in the third positioning groove 18. At this time, there is a positioning between the guide rod 9 and the support ring 10, and there is also a positioning between the guide rod 9 and the roller 2, so that the roller 2 cannot rotate. Therefore, the non-rotating roller 2 will clamp the top cover body 1 to prevent the top cover body 1 from shaking up and down due to vibration during cleaning.

[0034] A storage bracket 21 and a water spray pipe 22 are fixed on the outer surface of the rotating rod 6. There are two sets of storage brackets 21. The upper telescopic bracket 23 and the lower telescopic bracket 26 are respectively movably installed inside the two sets of storage brackets 21. A scraper 20 is movably installed inside the upper telescopic bracket 23. Due to centrifugal force, the scraper 20 will move towards the inside of the sealing groove 5, so that the scraper 20 is in close contact with the inner wall of the sealing groove 5, thereby scraping away the water sprayed from the water spray pipe 22 and foreign objects inside the sealing groove 5. This cleaning component is automatic, and the rotating rod 6 can quickly clean the sealing groove 5 multiple times, improving the cleaning efficiency. A gear 24 is movably installed inside the lower telescopic bracket 26.

[0035] Based on Embodiment 1, in order to improve the cleaning efficiency of the sealing groove 5 inside the top cover body 1, a motor 3 is fixed at the lower end of the bracket 4, and a rotating rod 6 is located inside the bracket 4 and connected to the output end of the motor 3. A sealing groove 5 is opened on the inner wall of the top cover body 1. The radius of the scraper 20 is greater than the depth of the sealing groove 5. The roller 2 is located on the outer surface of the guide rod 9 between the two sets of support rings 10. The spring 11 is located on the outer surface of the guide rod 9 on the side of the support plate 8. When the guide rod 9 is released, under the elasticity of the spring 11, the guide rod 9 will move back. At the same time, the first positioning block 16 is locked in the second positioning groove 14, and the second positioning block 15 is locked in the third positioning groove 18. At this time, there is a positioning between the guide rod 9 and the support ring 10, and they cannot rotate relative to each other. There is also a positioning between the guide rod 9 and the roller 2, and they cannot rotate relative to each other, so that the roller 2 cannot rotate.

[0036] A set of support rings 10 has a second annular groove 17, a third positioning groove 18 and a fourth positioning groove 19 on its inner wall. The second annular groove 17 has two sets symmetrically distributed. The third positioning groove 18 is connected to only one set of the second annular grooves 17. The fourth positioning groove 19 is connected to both sets of the second annular grooves 17. The roller 2 has a first positioning groove 12, a first annular groove 13 and a second positioning groove 14 inside. The first positioning groove 12 and the second positioning groove 14 are both connected to the first annular groove 13. The depth of the second positioning groove 14 is less than the depth of the first positioning groove 12. The first positioning block 16 is locked in the second positioning groove 14, so that the second positioning block 15 is locked in the third positioning groove 18. At this time, there is a positioning between the guide rod 9 and the support ring 10, and there is also a positioning between the guide rod 9 and the roller 2, so that the roller 2 cannot rotate. Therefore, the roller 2, which cannot rotate, will clamp the top cover body 1 to prevent the top cover body 1 from shaking up and down due to vibration during cleaning.

[0037] The outer surface of the guide rod 9 is fixed with a second positioning block 15 and a first positioning block 16. The second positioning block 15 corresponds to the second annular groove 17, the third positioning groove 18, and the fourth positioning groove 19 and is movably engaged. The first positioning block 16 corresponds to the first positioning groove 12, the first annular groove 13, and the second positioning groove 14 and is movably engaged.

[0038] Two sets of storage brackets 21 are symmetrically distributed on the outer surface of the rotating rod 6. The upper telescopic bracket 23 has a sleeve 25 inside, and the scraper 20 is fixed to the end of the sleeve 25. The inner wall of the upper telescopic bracket 23 has an arc-shaped groove 31. The outer surface of the sleeve 25 is fixed with a positioning rod 30. The positioning rod 30 corresponds to the arc-shaped groove 31 and is movably engaged. The arc-shaped groove 31 is a curved groove with up and down undulations. Therefore, when the scraper 20 rotates, it will drive the positioning rod 30 to move along the arc-shaped groove 31, so that the scraper 20 moves up and down while rotating, thereby scraping away foreign objects at the upper and lower ends of the inner wall of the sealing groove 5, further improving the completeness of cleaning foreign objects inside the sealing groove 5. However, when using a scraper 20 with the same size as the sealing groove 5 for cleaning, when the scraper 20 is subjected to centrifugal force and moves towards the sealing groove 5, all four sides of the scraper 20 will contact the surface of the sealing groove 5, which greatly increases the friction between the scraper 20 and the sealing groove, making it impossible for the scraper 20 to rotate quickly, thus affecting the scraping effect.

[0039] The lower telescopic bracket 26 has a movable transmission rod 27 inside. A gear 24 is fixed to the bottom surface of the transmission rod 27. A limit groove 28 is opened on the upper outer surface of the transmission rod 27. A limit block 29 is fixed to the inner wall of the sleeve 25. The upper end of the transmission rod 27 is movably disposed inside the sleeve 25. The limit groove 28 and the limit block 29 correspond to each other and are movably locked. The gear 24 and the gear ring 7 correspond to each other and are movably locked. When the rotating rod 6 drives the scraper 20 to make a circular motion, the gear 24 will also make a circular motion at the same time, and the gear ring 7 will cause the gear making a circular motion to make the tooth make a circular motion. The wheel 24 rotates, and the rotating gear 24 drives the scraper 20 to rotate through the transmission rod 27. The direction of the scraper 20's rotation is opposite to the direction of its circumferential motion, thereby increasing the friction between the scraper 20 and the inner wall of the sealing groove 5, thus making the foreign matter inside the sealing groove 5 more completely removed. The scraper 20 corresponds to the sealing groove 5, and the width of the sealing groove 5 is greater than the thickness of the scraper 20. The gear ring 7 is fixed to the upper surface of the support plate 8 inside the top cover body 1, and the roller 2 is located on the upper surface of the support plate 8 outside the top cover body 1.

[0040] In actual use, the top cover body 1 is placed on the support plate 8 using a tool. Since the roller 2 is in an active state and the outer surface of the roller 2 is made of rubber, when the top cover body 1 is placed on the support plate 8 and the roller 2 is squeezed, the roller 2 will rotate inside the support ring 10, which facilitates the downward movement of the top cover body 1 and positions the top cover body 1 to prevent the position of the top cover body 1 from shifting when it is placed on the support plate 8.

[0041] After the top cover body 1 is placed, pull the guide rod 9 at the end without the spring 11. At this time, the first positioning block 16 will move from the first positioning groove 12 to the first annular groove 13, and the second positioning block 15 will move from the second annular groove 17 on one side through the fourth positioning groove 19 to the second annular groove 17 on the other side. At this time, rotate the guide rod 9 180 degrees, and then release the guide rod 9. Under the elasticity of the spring 11, the guide rod 9 will move back, and at the same time, the first positioning block 16 will be locked in the second positioning groove 14, and the second positioning block 15 will be locked in the third positioning groove 18. At this time, there is a positioning between the guide rod 9 and the support ring 10, and there is also a positioning between the guide rod 9 and the roller 2, so that the roller 2 cannot rotate. Therefore, the roller 2, which cannot rotate, will clamp the top cover body 1 to prevent the top cover body 1 from shaking up and down due to vibration during cleaning.

[0042] The start motor 3 drives the rotating rod 6 to rotate, which in turn drives the storage bracket 21 and the water spray pipe 22 to rotate. The water spray pipe 22 sprays water into the sealing groove 5. Since the scraper 20 and the storage bracket 21 are telescopically connected, due to centrifugal force, the scraper 20 will move into the sealing groove 5, making the sealing groove 5 tightly adhere to the inner wall of the sealing groove 5. The scraper 20 has bristles fixed on its surface, thereby scraping away the water sprayed from the water spray pipe 22 and foreign objects inside the sealing groove 5. This cleaning component is an automatic cleaning system, and the rotating rod 6 can quickly clean the sealing groove 5 multiple times, improving cleaning efficiency.

[0043] Since the transmission rod 27 is movably locked inside the sleeve 25, and the gear 24 corresponds to and is locked with the gear ring 7, and the limiting groove 28 and the limiting block 29 are locked to form a limit between the transmission rod 27 and the sleeve 25, when the rotating rod 6 drives the scraper 20 to make a circular motion, the gear 24 will also make a circular motion at the same time. The gear ring 7 will cause the gear 24 to rotate, and the rotating gear 24 will drive the scraper 20 to rotate through the transmission rod 27. The direction of the scraper 20's rotation is opposite to the direction of the scraper 20's circular motion, thereby increasing the friction between the scraper 20 and the inner wall of the sealing groove 5, so that the foreign matter inside the sealing groove 5 is scraped more completely.

[0044] When the gear 24 drives the scraper 20 to rotate, the positioning rod 30 corresponds to and is engaged with the arc groove 31. Since the arc groove 31 is a curved groove with ups and downs, the rotation of the scraper 20 will drive the positioning rod 30 to move along the arc groove 31, thereby causing the scraper 20 to move up and down while rotating. This scrapes away foreign objects at the upper and lower ends of the inner wall of the sealing groove 5, further improving the completeness of cleaning foreign objects inside the sealing groove 5. However, when using a scraper 20 of the same size as the sealing groove 5 for cleaning, when the scraper 20 is subjected to centrifugal force and moves towards the sealing groove 5, all four sides of the scraper 20 will come into contact with the surface of the sealing groove 5, which greatly increases the friction between the scraper 20 and the sealing groove, preventing the scraper 20 from rotating quickly and thus affecting the scraping effect.

[0045] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A cleaning device for the top cover of a reactor pressure vessel, characterized in that: include: The bracket (4) has a support plate (8) fixed at its upper end. A toothed ring (7) is fixed on the upper surface of the support plate (8). A top cover body (1) is provided at the upper end of the support plate (8). A support ring (10) is fixed at the end of the support plate (8). A guide rod (9) is movably locked inside the support ring (10). A roller (2) and a spring (11) are movably sleeved on the outer surface of the guide rod (9). A rotating rod (6) has a storage bracket (21) and a water spray pipe (22) fixed on its outer surface. The storage bracket (21) has two sets. The upper telescopic bracket (23) and the lower telescopic bracket (26) are respectively movably installed inside the two sets of storage brackets (21). The upper telescopic bracket (23) is movably installed inside the scraper (20), and the lower telescopic bracket (26) is movably installed inside the gear (24). The lower end of the bracket (4) is fixed with a motor (3), the rotating rod (6) is located inside the bracket (4) and connected to the output end of the motor (3), and the inner wall of the top cover body (1) is provided with a sealing groove (5); the scraper (20) corresponds to the sealing groove (5), the gear ring (7) is fixed to the upper surface of the support plate (8) inside the top cover body (1), the roller (2) is located on the upper surface of the support plate (8) outside the top cover body (1), and the gear (24) corresponds to the gear ring (7) and is movably engaged.

2. A cleaning device for the top cover of a reactor pressure vessel according to claim 1, characterized in that: The radius of the scraper (20) is greater than the depth of the sealing groove (5), the roller (2) is located on the outer surface of the guide rod (9) between the two sets of support rings (10), and the spring (11) is located on the outer surface of the guide rod (9) on the side of the support plate (8).

3. A cleaning device for the top cover of a reactor pressure vessel according to claim 2, characterized in that: The inner wall of the support ring (10) is provided with a second annular groove (17), a third positioning groove (18) and a fourth positioning groove (19). The second annular groove (17) is provided with two sets symmetrically distributed. The third positioning groove (18) is only connected to one set of the second annular groove (17). The fourth positioning groove (19) is connected to both sets of the second annular groove (17).

4. A cleaning device for the top cover of a reactor pressure vessel according to claim 3, characterized in that: The roller (2) has a first positioning groove (12), a first annular groove (13) and a second positioning groove (14) inside. The first positioning groove (12) and the second positioning groove (14) are both connected to the first annular groove (13). The depth of the second positioning groove (14) is less than the depth of the first positioning groove (12).

5. A cleaning device for the top cover of a reactor pressure vessel according to claim 4, characterized in that: The outer surface of the guide rod (9) is fixed with a second positioning block (15) and a first positioning block (16). The second positioning block (15) corresponds to the second annular groove (17), the third positioning groove (18), and the fourth positioning groove (19) and is movably engaged. The first positioning block (16) corresponds to the first positioning groove (12), the first annular groove (13), and the second positioning groove (14) and is movably engaged.

6. A cleaning device for the top cover of a reactor pressure vessel according to claim 5, characterized in that: The two sets of storage brackets (21) are symmetrically distributed on the outer surface of the rotating rod (6). The upper telescopic bracket (23) is equipped with a sleeve (25) inside. The scraper (20) is fixed to the end of the sleeve (25). The inner wall of the upper telescopic bracket (23) is provided with an arc groove (31). The outer surface of the sleeve (25) is fixed with a positioning rod (30). The positioning rod (30) corresponds to the arc groove (31) and is movably engaged.

7. A cleaning device for the top cover of a reactor pressure vessel according to claim 6, characterized in that: The lower telescopic bracket (26) is equipped with a transmission rod (27) inside. The gear (24) is fixed to the bottom surface of the transmission rod (27). A limit groove (28) is opened on the upper outer surface of the transmission rod (27). A limit block (29) is fixed on the inner wall of the sleeve (25).

8. A cleaning device for the top cover of a reactor pressure vessel according to claim 7, characterized in that: The transmission rod (27) is movably disposed inside the sleeve (25) at its upper end, and the limiting groove (28) corresponds to the limiting block (29) and is movably engaged.

9. A cleaning device for the top cover of a reactor pressure vessel according to claim 8, characterized in that: The width of the sealing groove (5) is greater than the thickness of the scraper (20).

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