Cleaning device for top cover of reactor pressure vessel

Abstract

The invention relates to the technical field of reactor pressure vessels, in particular to a cleaning device for a top cover of a reactor pressure vessel. A supporting plate is fixed to the upper end of a support, storage supports and a water spraying pipe are fixed to the surface of the outer side of a rotating rod, the two storage supports are arranged, an upper telescopic support and a lower telescopic support are movably arranged in the two storage supports correspondingly, a scraping plate is movably arranged in the upper telescopic support, and a gear is movably arranged in the lower telescopic support; the sealing device has the beneficial effects that a rotating rod rotates to drive a storage support and a water spraying pipe to rotate, the water spraying pipe sprays water into a sealing groove, a scraping plate is movably connected with the storage support in a telescopic mode, the scraping plate moves towards the interior of the sealing groove due to centrifugal force, the sealing groove is tightly attached to the inner wall of the sealing groove, and therefore water sprayed out of the water spraying pipe and foreign matter in the sealing groove are scraped away; according to the cleaning assembly, automatic cleaning is achieved, the rotating rod can quickly clean the sealing groove for multiple times, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of reactor pressure vessels, in particular to a cleaning device for a top cover of a reactor pressure vessel. Background Art

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

[0003] In the prior art, the reactor pressure vessel is an important and irreplaceable equipment in a nuclear power plant. In order to ensure that it has a sufficiently good sealing performance during operation, the nuclear power plant must open the reactor pressure vessel and inspect its sealing structure during overhaul and refueling. The top cover sealing ring groove is an important part of the pressure vessel sealing structure. After the reactor pressure vessel is opened, the top cover sealing ring groove must be cleaned and inspected. The boron crystals and residual silver and other foreign matters in the sealing ring groove are removed by cleaning, and the cleaned ring groove is inspected.

[0004] However, in the existing pressure vessel top cover cleaning, manual cleaning is often used. During cleaning, the top cover is placed on a bracket in a storage room with the ring groove facing downward and a small distance relative to the ground, which causes inconvenience to personnel operation and high labor intensity, resulting in low cleaning efficiency. Summary of the invention

[0005] The object of the present invention is to provide a cleaning device for a reactor pressure vessel top cover to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cleaning device for a reactor pressure vessel top cover, a bracket, a support plate is fixed on the upper end of the bracket, a gear ring is fixed on the upper surface of the support plate, a top cover body is provided on the upper end of the support plate, a support ring is fixed on the end of the support plate, a guide rod is movably provided inside the support ring, and a roller and a spring are movably sleeved on the outer surface of the guide rod; A rotating rod, a storage bracket and a water spray pipe are fixed on the outer surface of the rotating rod, the storage bracket is provided with two groups, and an upper telescopic bracket and a lower telescopic bracket are movably provided inside the two groups of storage brackets, a scraper is movably provided inside the upper telescopic bracket, and a gear is movably provided inside the lower telescopic bracket.

[0007] Preferably, a motor is fixed at the lower end of the bracket, the rotating rod is arranged 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.

[0008] Preferably, the radius of the scraper is greater than the width of the sealing groove, the roller is located on the outer surface of the guide rod between the two groups of support rings, and the spring is located on the outer surface of the guide rod on the side of the support plate.

[0009] Preferably, a group of the support ring inner walls are provided with a second annular groove, a third positioning groove and a fourth positioning groove, the second annular grooves are provided with two groups symmetrically distributed, the third positioning groove is connected to only one group of the second annular grooves, and the fourth positioning groove is connected to both groups of the second annular grooves.

[0010] Preferably, a first positioning groove, a first annular groove and a second positioning groove are formed inside the roller, the first positioning groove and the second positioning groove are both connected to the first annular groove, and the depth of the second positioning groove is less than that of the first positioning groove.

[0011] 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 the second annular groove, the third positioning groove and the fourth positioning groove and is movably clamped, and the first positioning block corresponds to the first positioning groove, the first annular groove and the second positioning groove and is movably clamped.

[0012] Preferably, the two groups of storage brackets are symmetrically distributed on the outer surface of the rotating rod, a sleeve is movably provided inside the upper telescopic bracket, the scraper is fixed to the end of the sleeve, an arc groove is opened on the inner wall of the upper telescopic bracket, a positioning rod is fixed on the outer surface of the sleeve, and the positioning rod corresponds to the arc groove and is movably clamped.

[0013] 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 limiting groove is provided on the outer surface of the upper end of the transmission rod, and a limiting block is fixed on the inner wall of the sleeve.

[0014] Preferably, the transmission rod is movably arranged inside the sleeve near the upper end, the limiting groove corresponds to the limiting block and is movably arranged, and the gear corresponds to the gear ring and is movably arranged.

[0015] Preferably, the scraper corresponds to the sealing groove, the width of the sealing groove is greater than the width of the scraper, the gear 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.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The starting motor drives the rotating rod to rotate, and the rotation of the rotating rod will drive the storage bracket and the water spray pipe to rotate. The water spray pipe will spray water to the inside of the sealing groove. Since the scraper and the storage bracket are telescopically connected, due to centrifugal force, the scraper will move toward the inside of the sealing groove, so that the sealing groove is close to the inner wall of the sealing groove. Bristles are fixed on the surface of the scraper to scrape off the water sprayed by the water spray pipe and foreign matter inside the sealing groove. This cleaning component is automatic cleaning, and the rotating rotating rod can quickly clean the sealing groove multiple times, thereby improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 It is a three-dimensional schematic diagram of the main structure of the top cover of the present invention; Figure 3 It is a three-dimensional schematic diagram of the cleaning component structure of the present invention; Figure 4 It is a three-dimensional schematic diagram of the structure of the clamping assembly of the present invention; Figure 5 It is a cutaway exploded perspective schematic diagram of the clamping assembly structure of the present invention; Figure 6 It is an exploded stereoscopic schematic diagram of the cleaning component structure of the present invention; Figure 7 It is an exploded stereoscopic schematic diagram of the rotating rod assembly structure of the present invention; Figure 8 It is a three-dimensional schematic diagram of the scraper assembly structure of the present invention; Fig. 9 It is a cutaway exploded perspective schematic diagram of the scraper assembly structure of the present invention; Fig.10 It is a cutaway exploded perspective schematic diagram of the scraper assembly structure of the present invention; Fig.11 It is a cutaway exploded perspective schematic diagram of the upper telescopic bracket assembly structure of the present invention.

[0018] In the figure: 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. limit groove; 29. ​​limit block; 30. positioning rod; 31. arc groove. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figures 1 to 11 The present invention provides a technical solution: a cleaning device for a reactor pressure vessel top cover.

[0021] Embodiment 1, a cleaning device for a reactor pressure vessel top cover, comprising: a support plate 8 is fixed to the upper end of a bracket 4, a gear ring 7 is fixed to the upper surface of the support plate 8, a top cover body 1 is arranged at the upper end of the support plate 8, a support ring 10 is fixed to the end of the support plate 8, a guide rod 9 is movably clamped inside the support ring 10, a roller 2 and a spring 11 are 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 being offset when the position is 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 is clamped in the second positioning groove 14, and the second positioning block 15 is clamped in the third positioning groove 18, at this time, the guide rod 9 and the support ring 10 are positioned so as not to rotate relative to each other, and the guide rod 9 and the roller 2 are also positioned so as not to rotate relative to each other, so that the roller 2 cannot rotate, so the roller 2 that 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.

[0022] A storage bracket 21 and a water spray pipe 22 are fixed to the outer surface of the rotating rod 6. There are two groups of storage brackets 21. An upper telescopic bracket 23 and a lower telescopic bracket 26 are movably provided inside the two groups of storage brackets 21. A scraper 20 is movably provided inside the upper telescopic bracket 23. Due to centrifugal force, the scraper 20 will move toward the inside of the sealing groove 5, so that the sealing groove 5 is close to the inner wall of the sealing groove 5, thereby scraping off the water sprayed by the water spray pipe 22 and the foreign matter inside the sealing groove 5. This cleaning component is automatic cleaning, and the rotating rotating rod 6 can quickly clean the sealing groove 5 multiple times, thereby improving the cleaning efficiency. A gear 24 is movably provided inside the lower telescopic bracket 26.

[0023] On the basis of Example 1, in order to improve the cleaning efficiency of the sealing groove 5 inside the top cover body 1, a motor 3 is fixed to the lower end of the bracket 4, a rotating rod 6 is arranged 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 width of the sealing groove 5, the roller 2 is located on the outer surface of the guide rod 9 between the two groups 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. The guide rod 9 is released, and under the elasticity of the spring 11, the guide rod 9 will move back, and at the same time, the first positioning block 16 is stuck in the second positioning groove 14, and the second positioning block 15 is stuck in the third positioning groove 18. At this time, the guide rod 9 and the support ring 10 are positioned so that they cannot rotate relative to each other, and the guide rod 9 and the roller 2 are also positioned so that they cannot rotate relative to each other, so that the roller 2 cannot rotate.

[0024] A second annular groove 17, a third positioning groove 18 and a fourth positioning groove 19 are provided on the inner wall of a group of support rings 10. The second annular grooves 17 are provided in two groups and are symmetrically distributed. The third positioning groove 18 is communicated with only one group of the second annular grooves 17, and the fourth positioning groove 19 is communicated with both groups of the second annular grooves 17. A first positioning groove 12, a first annular groove 13 and a second positioning groove 14 are provided inside the roller 2. The first positioning groove 12 and the second positioning groove 14 are both communicated with 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 clamped in the second positioning groove 14, so that the second positioning block 15 is clamped in the third positioning groove 18. At this time, the guide rod 9 and the support ring 10 are positioned so as not to rotate relative to each other, and the guide rod 9 and the roller 2 are also positioned so as not to rotate relative to each other, so that the roller 2 cannot rotate. Therefore, the roller 2 that 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.

[0025] A second positioning block 15 and a first positioning block 16 are fixed to the outer surface of the guide rod 9. 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 clamped. 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 clamped.

[0026] The two groups of storage brackets 21 are symmetrically distributed on the outer surface of the rotating rod 6. A sleeve 25 is movably provided inside the upper telescopic bracket 23. The scraper 20 is fixed to the end of the sleeve 25. An arc groove 31 is opened on the inner wall of the upper telescopic bracket 23. A positioning rod 30 is fixed on the outer surface of the sleeve 25. The positioning rod 30 corresponds to the arc groove 31 and is movably clamped. The arc groove 31 is a curved groove that fluctuates up and down. Therefore, when the scraper 20 rotates, the positioning rod 30 will be driven to move along the arc groove 31, so that the scraper 20 moves up and down while rotating, thereby scraping off foreign matter on the upper and lower ends of the inner wall of the sealing groove 5, further improving the completeness of cleaning foreign matter inside the sealing groove 5. When the scraper 20 of the same size as the sealing groove 5 is used for cleaning, when the scraper 20 is subjected to centrifugal force and moves toward the sealing groove 5, the surfaces around 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, so that the scraper 20 cannot rotate quickly, thereby affecting the scraping effect.

[0027] A transmission rod 27 is movably arranged inside the lower telescopic bracket 26, and the gear 24 is fixed to the bottom surface of the transmission rod 27. A limit groove 28 is provided on the outer surface of the upper end of the transmission rod 27, and a limit block 29 is fixed on the inner wall of the sleeve 25. The transmission rod 27 is movably arranged inside the sleeve 25 near the upper end, and the limit groove 28 corresponds to the limit block 29 and is movably arranged. The gear 24 corresponds to the gear ring 7 and is movably arranged. When the rotating rod 6 drives the scraper 20 to make a circular motion, the gear 24 will also make a circular motion, and the gear ring 7 will make the gears that make a circular motion move. The wheel 24 rotates, and the self-rotating gear 24 drives the scraper 20 to rotate through the transmission rod 27, and the direction of the scraper 20's rotation is opposite to the direction of the scraper 20's circumferential movement, 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 can be scraped off more completely. The scraper 20 corresponds to the sealing groove 5, and the width of the sealing groove 5 is greater than the width 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.

[0028] In actual use, a tool is used to place the top cover body 1 on the support plate 8. 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 at the same time to prevent the top cover body 1 from being offset when it is placed on the support plate 8. After the top cover body 1 is placed, the guide rod 9 without the spring 11 is pulled. At this time, the first positioning block 16 will move from the first positioning groove 12 to the first annular groove 13, and at the same time, 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, the guide rod 9 is rotated 180 degrees, and then the guide rod 9 is released. 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 clamped in the second positioning groove 14, and the second positioning block 15 will be clamped in the third positioning groove 18. At this time, there is a positioning between the guide rod 9 and the support ring 10 that cannot rotate relative to each other, and there is also a positioning between the guide rod 9 and the roller 2 that cannot rotate relative to each other, so that the roller 2 cannot rotate, so the non-rotatable 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; The motor 3 is started to drive the rotating rod 6 to rotate. The rotation of the rotating rod 6 will drive the storage bracket 21 and the water spray pipe 22 to rotate. The water spray pipe 22 will spray water to the inside of the sealing groove 5. Since the scraper 20 is telescopically connected to the storage bracket 21, due to the centrifugal force, the scraper 20 will move toward the inside of the sealing groove 5, so that the sealing groove 5 is close to the inner wall of the sealing groove 5. The surface of the scraper 20 is fixed with bristles, so that the water sprayed by the water spray pipe 22 and the foreign matter inside the sealing groove 5 are scraped off. This cleaning component is automatic cleaning, and the rotating rotating rod 6 can quickly clean the sealing groove 5 multiple times, thereby improving the cleaning efficiency; Since the transmission rod 27 is movably clamped inside the sleeve 25, and the gear 24 corresponds to and is clamped with the gear ring 7, and the limiting groove 28 and the limiting block 29 are clamped 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 circumferential motion, and the gear ring 7 will make the gear 24 that makes a circular motion to rotate, and the self-rotating gear 24 will drive the scraper 20 to rotate through the transmission rod 27, and the direction of the scraper 20 self-rotation is opposite to the direction of the scraper 20 circumferential 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 can be scraped off more completely; When the gear 24 drives the scraper 20 to rotate, since the positioning rod 30 corresponds to and is fixed to the arc groove 31, and the arc groove 31 is a curved groove that undulates up and down, the scraper 20 will drive the positioning rod 30 to move along the arc groove 31 when it rotates, so that the scraper 20 moves up and down while rotating, thereby scraping off foreign matter on the upper and lower ends of the inner wall of the sealing groove 5, further improving the completeness of cleaning foreign matter inside the sealing groove 5, and using a scraper 20 of the same size as the sealing groove 5 for cleaning, when the scraper 20 is moved toward the sealing groove 5 by centrifugal force, the surfaces of the scraper 20 on all sides will contact the surface of the sealing groove 5, which greatly increases the friction between the scraper 20 and the sealing groove, so that the scraper 20 cannot rotate quickly, thereby affecting the scraping effect.

[0029] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A cleaning device for a reactor pressure vessel top cover, characterized in that: include: A bracket (4), wherein a support plate (8) is fixed at the upper end of the bracket (4), a gear 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 provided inside the support ring (10), and a roller (2) and a spring (11) are movably sleeved on the outer surface of the guide rod (9); A rotating rod (6), wherein a storage bracket (21) and a water spray pipe (22) are fixed to the outer surface of the rotating rod (6), wherein the storage bracket (21) is provided with two groups, wherein an upper telescopic bracket (23) and a lower telescopic bracket (26) are movably provided inside the two groups of the storage brackets (21), respectively, wherein a scraper (20) is movably provided inside the upper telescopic bracket (23), and a gear (24) is movably provided inside the lower telescopic bracket (26).

2. A cleaning device for a reactor pressure vessel top cover according to claim 1, characterized in that: A motor (3) is fixed to the lower end of the bracket (4), the rotating rod (6) is arranged inside the bracket (4) and connected to the output end of the motor (3), and a sealing groove (5) is provided on the inner wall of the top cover body (1).

3. A cleaning device for a reactor pressure vessel top cover according to claim 2, characterized in that: The radius of the scraper (20) is greater than the width 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).

4. A cleaning device for a reactor pressure vessel top cover according to claim 3, characterized in that: A second annular groove (17), a third positioning groove (18) and a fourth positioning groove (19) are formed on the inner wall of a group of the support rings (10); the second annular grooves (17) are formed in two groups and are symmetrically distributed; the third positioning groove (18) is communicated with only one group of the second annular grooves (17); and the fourth positioning groove (19) is communicated with both groups of the second annular grooves (17).

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

6. The cleaning device for a reactor pressure vessel top cover according to claim 5, characterized in that: A second positioning block (15) and a first positioning block (16) are fixed on the outer surface of the guide rod (9); 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 arranged; and 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 arranged.

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

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

9. The cleaning device for a reactor pressure vessel top cover according to claim 8, characterized in that: The transmission rod (27) is movably disposed inside the sleeve (25) at the upper end, the limiting groove (28) corresponds to the limiting block (29) and is movably disposed, and the gear (24) corresponds to the gear ring (7) and is movably disposed.

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

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