Reactor pressure vessel cylinder ring cutting device and ring cutting method
Through the multi-module collaborative design of the reactor pressure vessel cylinder ring cutting device, the problem of cutting large nuclear island main equipment was solved, safe and efficient cylinder ring cutting was achieved, radiation risk and cutting difficulty were reduced, and cutting quality and lifting convenience were improved.
Patent Information
- Application Number
- CN202211491089.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-11-25
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2042-11-25
AI Technical Summary
Existing technology makes it difficult to effectively cut reactor pressure vessels, the main equipment of large nuclear islands, due to the problems of large equipment size, thick walls, heavy weight and high radiation dose, resulting in large cutting workload and high radiation risk for personnel.
A reactor pressure vessel cylinder ring cutting device is used, including a support module, a rotation module, a cutting module, and a clamping and transportation module. Through multi-module collaborative design, the ring cutting of the cylinder is achieved by remote control, which reduces personnel radiation exposure, optimizes the driving torque, ensures cutting effect and convenient lifting.
It achieves stable cutting of large nuclear island main equipment, reduces radiation dose, reduces cutting heat and debris, improves cut flatness, simplifies the lifting process, and reduces the selection requirements of drive components.
Smart Images
Figure CN116275273B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of cutting and volume reduction of radioactive metal waste, and in particular relates to a reactor pressure vessel cylinder ring cutting device and a ring cutting method. Background Art
[0002] Nuclear power plant reactors typically have an operating lifespan of 40-60 years. Upon reaching the end of their service life, they undergo decommissioning procedures such as cutting, dismantling, and preparation in accordance with relevant national regulations. During decommissioning, large radioactive metal waste must be cut and prepared to reduce space usage, minimize waste disposal volume, and lower disposal costs. Therefore, large radioactive metal waste cutting technology is essential for nuclear power plant decommissioning.
[0003] Cutting large nuclear island main equipment is one of the most complex and difficult technologies and projects. Currently, there is no systematic research on cutting technology for large nuclear island main equipment in China. Taking the reactor pressure vessel, a common large nuclear island main equipment, as an example, the equipment consists of the nozzle section, straight tube section, and bottom head from top to bottom. There are several difficulties in cutting:
[0004] (1) The equipment is large in size, thick in wall thickness and heavy in weight. Specifically, it is about 10 meters high, close to 5 meters in diameter, the main body thickness is 170 mm, the thickest part at the nozzle flange is 850 mm, and the weight is 130 tons, so the cutting workload is large.
[0005] (2) The equipment directly contains the fuel cladding, which is exposed to neutrons for a long time, resulting in a high dose of radioactive radiation. It is also in contact with highly radioactive coolant for a long time, resulting in an extremely high dose of the surface active layer, making it difficult for personnel to approach.
[0006] In view of the special structure of the reactor pressure vessel cylinder and the above-mentioned cutting difficulties, the present invention provides a reactor pressure vessel cylinder ring cutting device and ring cutting method, which can cut the reactor pressure vessel cylinder into a bottom head, a middle ring body and a nozzle flange ring area, wherein the middle ring body can be cut into several ring cutting blocks to facilitate subsequent small block cutting work. Summary of the Invention
[0007] In view of this, in order to overcome the defects of the prior art and achieve the above-mentioned purpose, the purpose of the present invention is to provide a reactor pressure vessel cylinder ring cutting device and ring cutting method.
[0008] In order to achieve the above-mentioned object, the product in the technical solution adopted by the present invention is a reactor pressure vessel cylinder ring cutting device, comprising:
[0009] A support module for supporting a reactor pressure vessel cylinder, the support module comprising a base plate, a fixed support ring, and a first lifting leg. The fixed support ring is disposed above the base plate and is movable up and down. The first lifting leg extends in a vertical direction. The bottom of the first lifting leg is connected to the base plate, and the top of the first lifting leg is connected to the fixed support ring. When the first lifting leg is extended or retracted, the fixed support ring can be driven to move up and down.
[0010] a rotating module for driving the barrel to rotate along its own axis, the rotating module comprising a rotating support ring rotatably arranged on the fixed support ring, and a driving assembly for driving the rotating support ring to rotate, the rotating support ring and the fixed support ring having equal inner and outer diameters and being coaxially arranged, the rotating support ring being provided with a positioning slot matching the nozzle section of the barrel, and the driving assembly being connected to the side wall of the fixed support ring;
[0011] a cutting module for cutting the cylinder; the cutting module comprises a fixed bracket, a telescopic arm, a radial slide, a cutting motor, a circular saw blade, and a radial feed motor, the fixed bracket being connected to the side wall of the fixed support ring, the telescopic arm being telescopically connected to the bottom of the fixed bracket and extending vertically downward, the radial slide being connected to the bottom of the telescopic arm and extending in the radial direction of the cylinder, the cutting motor being slidably connected to the radial slide, the circular saw blade being connected to the output shaft of the cutting motor, the plane where the circular saw blade is located being parallel to the horizontal plane, and the radial feed motor being used to drive the cutting motor to slide along the radial slide so that the circular saw blade approaches or moves away from the cylinder;
[0012] a clamping and transporting module for receiving, positioning, and transporting the cut ring segments; the clamping and transporting module comprises a transfer plate, a support plate, a second lifting leg, a positioning support ring, and a carrying plate; the transfer plate is horizontally movably mounted on a slide rail provided on the bottom plate; the carrying plate is rotatably arranged on the transfer plate via a load-bearing steel ball; the support plate is movably arranged above the transfer plate via the second lifting leg; the positioning support ring is connected to the support plate and is used to frame the bottom of the cylinder to prevent the cylinder from tipping over;
[0013] The transfer plate has a receiving working position and a moving-out working position. When the transfer plate is in the receiving working position, the transfer plate moves to the bottom of the rotating support ring so that the rotation axis of the carrier plate coincides with the rotation axis of the rotating support ring. The bottom of the cylinder can be supported on the carrier plate and rotate together with the carrier plate. The ring segment cut by the cutting module can be placed vertically on the carrier plate. When the transfer plate is in the moving-out working position, the transfer plate moves the carrier plate away from directly below the rotating support ring to separate the ring segment from the cylinder for lifting.
[0014] Preferably, an annular steel ball groove for placing the load-bearing steel balls is provided on the upper surface of the transfer plate.
[0015] Further preferably, the upper surface of the transfer plate is further provided with a receiving groove for accommodating the rotation of the supporting plate, and the steel ball groove is opened on the bottom wall of the receiving groove.
[0016] Preferably, a pressure sensor is provided between the top of the first lifting leg and the fixed support ring, and the pressure sensor is used to detect the pressure applied by the cylinder on the rotating support ring. When the detection value of the pressure sensor is less than the set value, the driving assembly drives the rotating support ring to rotate.
[0017] Preferably, the drive assembly includes a drive motor and a transmission unit, the drive motor is connected to the side wall of the fixed support ring, and the transmission unit includes a friction wheel arranged on the output shaft of the drive motor, and the outer wall of the friction wheel is in contact with and pressed against the outer wall of the rotating support ring.
[0018] Preferably, the positioning support ring is semicircular and can be opened and closed. When the transfer plate is in the receiving working position, the positioning support ring is symmetrically distributed on both sides of the cylinder.
[0019] Further preferably, the support plate is further provided with a hydraulic cylinder for driving the positioning support ring to open and close. When the hydraulic cylinder drives the positioning support ring to close, the inner wall of the positioning support ring is rotationally connected to the inner wall of the cylinder.
[0020] Further preferably, the positioning support ring includes a ring body, a retaining frame connected to the side of the ring body facing the cylinder, and a plurality of rolling bodies rotatably embedded in the retaining frame. When the positioning support ring is closed, the rolling bodies contact the outer wall of the cylinder to facilitate the rotation of the cylinder.
[0021] Further preferably, the positioning support ring also includes a fitting ring rotatably arranged on the ring body through the rolling body. When the positioning support ring is closed and the cylinder rotates, the fitting ring rotates with the cylinder and moves from one of the positioning support rings to the other positioning support ring.
[0022] To achieve the above-mentioned object, the method in the technical solution provided by the present invention is a reactor pressure vessel cylinder cutting method, which is performed using any one of the reactor pressure vessel cylinder cutting devices described in the claims above, and the cutting method comprises the following steps:
[0023] S1. Extend the first lifting leg to its highest position and move the transfer plate to the receiving working position;
[0024] S2. The cylinder to be cut is hoisted above the rotating support ring and dropped, so that the cylinder is mounted on the rotating support body, so that the bottom of the cylinder is positioned on the support ring frame column;
[0025] S3 retract the first lifting leg so that the lowest point of the cylinder is supported on the load plate, so that the weight of the cylinder shared by the rotating support frame does not exceed 5% of the cylinder's own weight;
[0026] S4. Change the extension length of the telescopic arm, adjust the circular saw blade to the set height; change the extension length of the second lifting leg, adjust the positioning support ring to the set height;
[0027] S5. Turn on the cutting motor and the radial travel motor, and use the radial travel motor to push the cutting motor and the circular saw blade gradually toward the axis of the cylinder until the depth of the circular saw blade inserted into the cylinder is greater than the wall thickness of the cylinder at that location;
[0028] S6. The drive assembly drives the rotating support ring to rotate, causing the cylinder to rotate around its own axis to achieve circumcision;
[0029] S7. After the circular cutting is completed, the cutting motor is turned off, and the radial movement motor drives the cutting motor and the circular saw blade back to their original positions;
[0030] S8. Raise the first lifting leg to separate the cylinder from the cut ring segment;
[0031] S9. Move the transfer plate to the out-of-work position so that the cut ring segments can be lifted out;
[0032] S10. Repeat steps S1-S10 to perform subsequent circumcision.
[0033] Due to the adoption of the above technical solution, compared with the prior art, the reactor pressure vessel cylinder ring cutting device provided by the present invention has the following advantages:
[0034] 1. The overall design of the circumcision device adopts a multi-module coordinated design, which has a more stable structure and more diverse functions.
[0035] 2. The reactor pressure vessel cutting and preparation operations can be realized through remote control, which can minimize the radiation dose received by the operators.
[0036] 3. Due to the presence of the clamping and transporting module, during the cutting process, the load-bearing plate can be used to provide a portion of the supporting force, reducing the pressure exerted by the cylinder on the rotating support ring, thereby reducing the friction between the rotating support ring and the fixed support ring, and reducing the torque required by the drive assembly. It can also make the bottom of the cylinder pressed against the load-bearing plate during the ring cutting process to avoid shaking, and the cutting effect is good. After the ring cutting is completed, the positioning support ring can be used to prevent the ring segment from tipping over, so that it remains in a vertical state and moves out with the transfer plate, making lifting more convenient.
[0037] 4. The heat and debris generated by circular saw blade cutting are relatively small, the incision is smoother, the amount of secondary pollutants generated is small, and it can easily cooperate with other module actions.
[0038] Due to the adoption of the above technical solution, compared with the prior art, the reactor pressure vessel cylinder ring cutting method provided by the present invention has the following advantages:
[0039] 1. It can significantly reduce the driving torque required when the cylinder changes from static to rotating, thereby optimizing the selection of drive components.
[0040] 2. The cut ring segments can be placed vertically on the load-bearing plate and moved out along with the transfer plate, making lifting more convenient.
[0041] 3. No need for close inspection, remote control can be easily achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0043] Figure 1 It is a front view schematic diagram of a preferred embodiment of the reactor pressure vessel cylinder ring cutting device of the present invention.
[0044] Figure 2 yes Figure 1 Schematic top view of .
[0045] Figure 3 yes Figure 1 Schematic cross-sectional view in the AA direction.
[0046] Figure 4 yes Figure 2 Schematic cross-sectional view in the BB direction.
[0047] Figure 5 yes Figure 1 3D schematic diagram of .
[0048] Figure 6 yes Figure 1 Schematic diagram of the front view of the middle transfer plate in the moved-out working position.
[0049] Figure 7 yes Figure 6 3D schematic diagram of .
[0050] Figure 8 yes Figure 1 Schematic diagram after the cylinder is placed.
[0051] Figure 9 yes Figure 8 A three-dimensional diagram of the lower section of the straight barrel after it is cut and removed.
[0052] Figure 10 yes Figure 8 A three-dimensional schematic diagram of the straight section of the cylinder after it is cut and removed.
[0053] Figure 11 yes Figure 3 A partial enlarged schematic diagram of point C in the middle.
[0054] in:
[0055] 10. Support module; 11. Bottom plate; 12. Fixed support ring; 13. First lifting leg; 14. Slide rail; 15. Pressure sensor; 20. Rotation module; 21. Rotation support ring; 211. Positioning slot; 22. Drive assembly; 221. Drive motor; 222. Friction wheel; 30. Cutting module; 31. Fixed bracket; 32. Telescopic arm; 33. Radial slide; 34. Cutting motor; 35. Circular saw blade; 36. 6. Radial feed motor; 40. Clamping transport module; 41. Transfer plate; 411. Weighing steel ball; 412. Steel ball groove; 413. Accommodating groove; 42. Support plate; 43. Second lifting leg; 44. Positioning support ring; 441. Ring body; 442. Retaining frame; 443. Rolling element; 444. Fitting ring; 45. Load-bearing plate; 46. Hydraulic cylinder; 51. Nozzle section; 52. Straight tube section; 53. Bottom head. DETAILED DESCRIPTION
[0056] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.
[0057] like Figures 1 to 11As shown, the reactor pressure vessel cylinder ring cutting device provided by the present invention includes: a support module 10, a rotation module 20, a cutting module 30, and a clamping and transporting module 40, wherein the support module 10 is used to support the reactor pressure vessel cylinder, the support module 10 includes a bottom plate 11, a fixed support ring 12, and a first lifting leg 13, the fixed support ring 12 is movably arranged above the bottom plate 11, the first lifting leg 13 extends in a vertical direction, the bottom of the first lifting leg 13 is connected to the bottom plate 11, and the top of the first lifting leg 13 is connected to the fixed support ring 12, there are four first lifting legs 13, these four first lifting legs 13 are evenly distributed around the axis of the fixed support ring 12, When the legs 13 are extended and retracted, they can drive the fixed support ring 12 to move up and down relative to the base plate 11; the rotating module 20 is used to drive the cylinder to rotate along its own axis. The rotating module 20 includes a rotating support ring 21 rotatably arranged on the fixed support ring 12, and a driving assembly 22 for driving the rotating support ring 21 to rotate. The inner diameter and outer diameter of the rotating support ring 21 are equal to those of the fixed support ring 12, and the rotating support ring 21 is coaxially arranged with the fixed support ring 12. The rotating support ring 21 is provided with a positioning slot 211 that matches the nozzle section 51 of the cylinder. The driving assembly 22 is connected to the side wall of the fixed support ring 12. Specifically, the transmission unit includes a friction wheel arranged on the output shaft of the drive motor 221 222, the outer wall of the friction wheel 222 is in contact with and pressed against the outer wall of the rotating support ring 21; the cutting module 30 is used to cut the cylinder, and the cutting module 30 includes a fixed bracket 31, a telescopic arm 32, a radial slide 33, a cutting motor 34, a circular saw blade 35, and a radial feed motor 36. The fixed bracket 31 is connected to the side wall of the fixed support ring 12, the telescopic arm 32 is telescopically connected to the bottom of the fixed bracket 31 and extends vertically downward, the radial slide 33 is connected to the bottom of the telescopic arm 32 and extends along the radial direction of the cylinder, the cutting motor 34 is slidably connected to the radial slide 33, the circular saw blade 35 is connected to the output shaft of the cutting motor 34, and the plane where the circular saw blade 35 is located is parallel to the horizontal plane, and the radial The feed motor 36 is used to drive the cutting motor 34 to slide along the radial slide 33, so that the circular saw blade 35 is close to or away from the cylinder; the clamping and transporting module 40 is used to receive, position and transport the cut ring segments, and the clamping and transporting module 40 includes a transfer plate 41, a support plate 42, a second lifting leg 43, a positioning support ring 44, and a carrying plate 45. The transfer plate 41 can be horizontally movably mounted on the slide rail 14 provided on the bottom plate 11, and the carrying plate 45 can be rotatably set on the transfer plate 41 through a load-bearing steel ball 411. The support plate 42 is movably set above the transfer plate 41 through the second lifting leg 43. The positioning support ring 44 is connected to the support plate 42 and is used to frame the bottom of the cylinder to prevent the cylinder from tipping over.The transfer plate 41 has a receiving working position and a moving working position. When the transfer plate 41 is in the receiving working position, the transfer plate 41 moves below the rotating support ring 21, so that the rotation axis of the support plate 45 coincides with the rotation axis of the rotating support ring 21. The bottom of the cylinder can be supported on the support plate 45 and rotate together with the support plate 45. The ring segment cut by the cutting module 30 can be placed vertically on the support plate 45. When the transfer plate 41 is in the moving working position, the transfer plate 41 moves the support plate 45 away from directly below the rotating support ring 21, separating the ring segment from the cylinder for lifting.
[0058] The benefits of this setting are:
[0059] 1. The design of multi-module cooperation makes the structure more stable and the functions more diverse.
[0060] 2. The reactor pressure vessel cutting and preparation operations can be realized through remote control, which can minimize the radiation dose received by the operators.
[0061] 3. Due to the presence of the clamping and transporting module, during the cutting process, the load-bearing plate can be used to provide a portion of the supporting force, reducing the pressure exerted by the cylinder on the rotating support ring, thereby reducing the friction between the rotating support ring and the fixed support ring, and reducing the torque required by the drive assembly. It can also make the bottom of the cylinder pressed against the load-bearing plate during the ring cutting process to avoid shaking, and the cutting effect is good. After the ring cutting is completed, the positioning support ring can be used to prevent the ring segment from tipping over, so that it remains in a vertical state and moves out with the transfer plate, making lifting more convenient.
[0062] 4. The heat and debris generated by circular saw blade cutting are relatively small, the incision is smoother, the amount of secondary pollutants generated is small, and it can easily cooperate with other module actions.
[0063] 5. Because the torque required by the drive assembly is relatively small, a motor with lower power, smaller size, and lighter weight can be used. Furthermore, due to the friction wheel transmission, when the drive motor drives the rotating support ring via the friction wheel, the friction wheel can conveniently slip and idle to match the cutting progress of the circular saw blade, avoiding the phenomenon of circular saw blade chipping caused by excessive rotation of the rotating support ring, and ensuring that the circular saw blade can complete the circular cutting. Specifically, when the circular saw blade cuts the cylinder, the rotating support ring is actually subjected to a thrust force F1 from the circular saw blade. The thrust force F1 gradually decreases with the cutting progress of the circular saw blade. After the cylinder is completely cut, the thrust force F1 is reduced to 0. At this time, the friction wheel drives the rotating support ring to rotate, causing the cylinder to rotate, which is equivalent to feeding. When the fractured part of the cylinder contacts the edge of the circular saw blade, F1 gradually increases. When it exceeds the friction force F2 between the friction wheel and the rotating support ring, the friction wheel slips, the cylinder stops rotating, and feeding stops, thus avoiding circular saw blade chipping.
[0064] In this embodiment, the upper surface of the transfer plate 41 is provided with an annular steel ball groove 412 for placing the load-bearing steel balls 411, and a receiving groove 413 for accommodating the rotation of the supporting plate 45. The steel ball groove 412 is provided on the bottom wall of the receiving groove 413. The advantage of this arrangement is that it can prevent the supporting plate 45 from shaking in the horizontal direction when rotating.
[0065] In order to accurately control the extension height of the first lifting leg 13, in this embodiment, a pressure sensor 15 is provided between the top of the first lifting leg 13 and the fixed support ring 12. The pressure sensor 15 is used to detect the pressure applied by the cylinder on the rotating support ring 21. When the detection value of the pressure sensor 15 is less than the set value, the driving component 22 drives the rotating support ring 21 to rotate to avoid overloading the driving component 22.
[0066] In this embodiment, the positioning support ring 44 is semicircular and has two pieces, which can be opened and closed. Specifically, the support plate 42 also has two pieces, and each support plate 42 is used to set a support ring 44. When the transfer plate 41 is in the receiving working position, the positioning support ring 44 and the support plate 42 are symmetrically distributed on both sides of the cylinder.
[0067] In order to facilitate the opening and closing of the positioning support ring 44, in this embodiment, a hydraulic cylinder 46 for driving the positioning support ring 44 to open and close is further provided on the support plate 42. When the hydraulic cylinder 46 drives the positioning support ring 44 to close, the inner wall of the positioning support ring 44 is rotatably connected to the inner wall of the cylinder. Furthermore, the positioning support ring 44 includes a ring body 441, a retaining frame 442 connected to the side of the ring body 441 facing the cylinder, and a plurality of rolling bodies 443 rotatably embedded in the retaining frame 442. When the positioning support ring 44 is closed, the rolling bodies 443 contact the outer wall of the cylinder to facilitate the rotation of the cylinder. Furthermore, in order to avoid the rolling bodies 443 In the event of knocks and damage to the grooves, welds, and other parts of the outer wall of the cylinder, in this embodiment, the positioning support ring 44 also includes a fitting ring 444 rotatably arranged on the ring body 441 through a rolling body 443. Specifically, the cross-section of the fitting ring 444 can be I-shaped. At the same time, an I-shaped slot is provided on the ring body 441. When the positioning support ring 44 is closed and the cylinder rotates, the fitting ring 444 rotates with the cylinder and moves from one positioning support ring 44 to another positioning support ring 44. Furthermore, the side of the fitting ring 444 facing the cylinder is provided with an ultra-slip and ultra-hard coating (such as a silicon carbide coating, etc.) to achieve the technical effects of low friction stress and wear resistance.
[0068] The present invention also provides a reactor pressure vessel cylinder cutting method, which uses the reactor pressure vessel cylinder cutting device to perform cutting. The cutting method includes the following steps:
[0069] S1. Extend the first lifting leg to its highest position and move the transfer plate to the receiving working position;
[0070] S2. The cylinder to be cut is hoisted above the rotating support ring and dropped, so that the cylinder is mounted on the rotating support body, so that the bottom of the cylinder is positioned on the support ring frame column;
[0071] S3. Retract the first lifting leg so that the lowest point of the cylinder is supported on the load plate, so that the weight of the cylinder shared by the rotating support frame does not exceed 5% of the cylinder's own weight;
[0072] S4. Change the extension length of the telescopic arm, adjust the circular saw blade to the set height; change the extension length of the second lifting leg, adjust the positioning support ring to the set height;
[0073] S5. Turn on the cutting motor and the radial travel motor, and use the radial travel motor to push the cutting motor and the circular saw blade gradually toward the axis of the cylinder until the depth of the circular saw blade inserted into the cylinder is greater than the wall thickness of the cylinder at that location;
[0074] S6. The drive assembly drives the rotating support ring to rotate, causing the cylinder to rotate around its own axis to achieve circumcision;
[0075] S7. After the circular cutting is completed, the cutting motor is turned off, and the radial movement motor drives the cutting motor and the circular saw blade back to their original positions;
[0076] S8. Raise the first lifting leg to separate the cylinder from the cut ring segment;
[0077] S9. Move the transfer plate to the out-of-work position so that the cut ring segments can be lifted out;
[0078] S10. Repeat steps S1-S10 to perform subsequent circumcision.
[0079] The benefits of this setting are:
[0080] 1. It can significantly reduce the driving torque required when the cylinder changes from static to rotating, thereby optimizing the selection of drive components.
[0081] 2. The cut ring segments can be placed vertically on the load-bearing plate and moved out along with the transfer plate, making lifting more convenient.
[0082] 3. No need for close inspection, remote control can be easily achieved.
[0083] Furthermore, in step S3, the burden of the cylinder weight on the rotating support ring is carried out by a pressure sensor arranged between the top of the first lifting leg and the fixed support ring.
[0084] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.
Claims
1. A reactor pressure vessel cylinder ring cutting device, characterized in that: include: A support module for supporting a reactor pressure vessel cylinder, the support module comprising a base plate, a fixed support ring, and a first lifting leg. The fixed support ring is disposed above the base plate and is movable up and down. The first lifting leg extends in a vertical direction. The bottom of the first lifting leg is connected to the base plate, and the top of the first lifting leg is connected to the fixed support ring. When the first lifting leg is extended or retracted, the fixed support ring can be driven to move up and down. a rotating module for driving the barrel to rotate along its own axis, the rotating module comprising a rotating support ring rotatably arranged on the fixed support ring, and a driving assembly for driving the rotating support ring to rotate, the rotating support ring and the fixed support ring having equal inner and outer diameters and being coaxially arranged, the rotating support ring being provided with a positioning slot matching the nozzle section of the barrel, and the driving assembly being connected to the side wall of the fixed support ring; a cutting module for cutting the cylinder; the cutting module comprises a fixed bracket, a telescopic arm, a radial slide, a cutting motor, a circular saw blade, and a radial feed motor, the fixed bracket being connected to the side wall of the fixed support ring, the telescopic arm being telescopically connected to the bottom of the fixed bracket and extending vertically downward, the radial slide being connected to the bottom of the telescopic arm and extending in the radial direction of the cylinder, the cutting motor being slidably connected to the radial slide, the circular saw blade being connected to the output shaft of the cutting motor, the plane where the circular saw blade is located being parallel to the horizontal plane, and the radial feed motor being used to drive the cutting motor to slide along the radial slide so that the circular saw blade approaches or moves away from the cylinder; a clamping and transporting module for receiving, positioning, and transporting the cut ring segments; the clamping and transporting module comprises a transfer plate, a support plate, a second lifting leg, a positioning support ring, and a carrying plate; the transfer plate is horizontally movably mounted on a slide rail provided on the bottom plate; the carrying plate is rotatably arranged on the transfer plate via a load-bearing steel ball; the support plate is movably arranged above the transfer plate via the second lifting leg; the positioning support ring is connected to the support plate and is used to frame the bottom of the cylinder to prevent the cylinder from tipping over; The transfer plate has a receiving working position and a moving-out working position. When the transfer plate is in the receiving working position, the transfer plate moves to the bottom of the rotating support ring so that the rotation axis of the carrier plate coincides with the rotation axis of the rotating support ring. The bottom of the cylinder can be supported on the carrier plate and rotate together with the carrier plate. The ring segment cut by the cutting module can be placed vertically on the carrier plate. When the transfer plate is in the moving-out working position, the transfer plate moves the carrier plate away from directly below the rotating support ring to separate the ring segment from the cylinder for lifting.
2. The reactor pressure vessel cylinder ring cutting device according to claim 1, characterized in that: An annular steel ball groove for placing the load-bearing steel balls is provided on the upper surface of the transfer plate.
3. The reactor pressure vessel cylinder ring cutting device according to claim 2, characterized in that: The upper surface of the transfer plate is further provided with a receiving groove for accommodating the rotation of the carrying plate, and the steel ball groove is opened on the bottom wall of the receiving groove.
4. The reactor pressure vessel cylinder ring cutting device according to claim 1, characterized in that: A pressure sensor is provided between the top of the first lifting leg and the fixed support ring. The pressure sensor is used to detect the pressure applied by the cylinder on the rotating support ring. When the detection value of the pressure sensor is less than the set value, the driving assembly drives the rotating support ring to rotate.
5. The reactor pressure vessel cylinder ring cutting device according to claim 1, characterized in that: The drive assembly includes a drive motor and a transmission unit. The drive motor is connected to the side wall of the fixed support ring. The transmission unit includes a friction wheel arranged on the output shaft of the drive motor. The outer wall of the friction wheel is in contact with and tightly pressed against the outer wall of the rotating support ring.
6. The reactor pressure vessel cylinder ring cutting device according to claim 1, characterized in that: The positioning support ring is semicircular and can be opened and closed. When the transfer plate is in the receiving working position, the positioning support ring is symmetrically distributed on both sides of the cylinder.
7. The reactor pressure vessel cylinder ring cutting device according to claim 6, characterized in that: The support plate is further provided with a hydraulic cylinder for driving the positioning support ring to open and close. When the hydraulic cylinder drives the positioning support ring to close, the inner wall of the positioning support ring is rotatably connected to the inner wall of the cylinder.
8. The reactor pressure vessel cylinder ring cutting device according to claim 7, characterized in that: The positioning support ring includes a ring body, a retaining frame connected to the side of the ring body facing the cylinder, and a plurality of rolling bodies rotatably embedded in the retaining frame. When the positioning support ring is closed, the rolling bodies contact the outer wall of the cylinder to facilitate the rotation of the cylinder.
9. The reactor pressure vessel cylinder ring cutting device according to claim 8, characterized in that: The positioning support ring also includes a fitting ring rotatably arranged on the ring body through the rolling body. When the positioning support ring is closed and the cylinder rotates, the fitting ring rotates with the cylinder and moves from one of the positioning support rings to the other positioning support ring.
10. A reactor pressure vessel cylinder cutting method, characterized in that: The reactor pressure vessel cylinder ring cutting device according to any one of claims 1 to 9 is used for cutting, and the cutting method comprises the following steps: S1. Extend the first lifting leg to its highest position and move the transfer plate to the receiving working position; S2. The cylinder to be cut is hoisted above the rotating support ring and dropped so that the cylinder is mounted on the rotating support ring and the positioning support ring frames the bottom of the cylinder; S3 retract the first lifting leg so that the lowest point of the cylinder is supported on the bearing plate, so that the weight of the cylinder shared by the rotating support ring does not exceed 90% of the cylinder's own weight; S4. Change the extension length of the telescopic arm, adjust the circular saw blade to the set height; change the extension length of the second lifting leg, adjust the positioning support ring to the set height; S5. Turn on the cutting motor and radial feed motor, and use the radial feed motor to push the cutting motor and the circular saw blade gradually toward the axis of the cylinder until the depth of the circular saw blade inserted into the cylinder is greater than the wall thickness of the cylinder at that location; S6. The drive assembly drives the rotating support ring to rotate, causing the cylinder to rotate around its own axis to achieve circumcision; S7. After the circular cutting is completed, the cutting motor is turned off, and the radial feed motor drives the cutting motor and the circular saw blade back to their original positions; S8. Raise the first lifting leg to separate the cylinder from the cut ring segment; S9. Move the transfer plate to the out-of-work position so that the cut ring segments can be lifted out; S10. Repeat steps S1-S9 to perform subsequent circumcision.