A loading mechanism for coating full-size cladding and control rod guide tubes of a nuclear reactor.

Abstract

This invention discloses a loading mechanism for coating full-size cladding and control rod guide tubes of a nuclear reactor, relating to the field of loading mechanisms. It includes a frame body with a lifting mechanism inside. The lifting mechanism includes a cylinder base, a cylinder body, and a cylinder trunnion seat. A support frame is fixedly connected to one side of the cylinder trunnion seat. Two sets of lifting hinges are rotatably connected to one end of the support frame. A limiting mechanism, including a limiting plate, is movably installed on the top of the support frame. This invention, by setting up a lifting mechanism and using a combination of a lower limiting mechanism, a multi-grooved support plate in the middle, and an upper annular clamp, ensures that long pipes do not bend, shift, or fall out during the uprighting process. This avoids pipe bending caused by manual uprighting, saves manpower, improves work efficiency, and allows loading of pipes of different diameters by changing the limiting mechanism, support plate, and annular clamp.

Description

Technical Field

[0001] This invention relates to the field of loading mechanism technology, specifically to a loading mechanism for coating full-size cladding and control rod guide tubes of a nuclear reactor. Background Technology

[0002] Full-size cladding tubes and control rod guide tubes (ultra-long thin tubes) are key components of nuclear power plants, and their straightness requirements are high. During the coating process, the cladding tubes and control rod guide tubes need to be changed from horizontal to vertical placement in order to be hoisted onto the coating machine fixtures. Currently, there are various ways to achieve the verticalization mechanism, such as using hydraulics, cylinders, or motors as power sources to achieve the verticalization function.

[0003] However, in the existing technology, there are many ways to implement the uprighting mechanism. Since the cladding tube and the control rod guide tube are ultra-long thin tubes, they are prone to bending during the uprighting process, which leads to excessive straightness. This cannot meet the requirements of preventing bending and collisions when uprighting ultra-long thin tubes. In order to address the above problems, a loading mechanism for coating the full-size cladding and control rod guide tube of a nuclear reactor is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a loading mechanism for coating full-size cladding and control rod guide tubes of nuclear reactors, in order to solve the problem that the uprighting mechanism proposed in the background art has multiple implementation methods. Since the cladding tube and control rod guide tube are ultra-long thin tubes, they are prone to bending during the uprighting process, resulting in excessive straightness and failing to meet the requirements of preventing bending and impact when uprighting ultra-long thin tubes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a loading mechanism for coating full-size cladding and control rod guide tubes of a nuclear reactor, comprising a frame body, two sets of universal wheels and two sets of directional wheels. The frame body has an internal lifting mechanism, which includes a cylinder base, a cylinder body, and a cylinder trunnion seat. A support frame is fixedly connected to one side of the cylinder trunnion seat. Two sets of lifting hinges are rotatably connected to one end of the support frame. A limiting mechanism is movably installed on the top of the support frame. The limiting mechanism includes a limiting plate with multiple limiting grooves inside. Two sets of support plates are fixedly installed on the top of the support frame. A ring clamp is fixedly installed on the top of the support frame. A controller is fixedly installed on one side of the frame body.

[0006] The limiting plate is made of PVC with multiple parallel limiting grooves on its side, each 10mm in diameter and 5mm deep. The position of the limiting plate on the support frame is adjustable. The support plate is a PVC board with multiple parallel 10*10mm grooves spaced 3-5mm apart. The casing tube and control rod guide tube are placed in the square grooves to prevent them from being bumped or scratched. The ring clamp is a high-elasticity metal clamp with a V-shaped opening, fixed to the top support frame. When clamping the pipe, the position of the limiting mechanism is adjusted according to the pipe length, so that the pipe protrudes 5-10mm from the ring clamp for easy removal. The combination of the lower limiting mechanism, the middle multi-grooved support plate, and the upper ring clamp ensures that long pipes do not bend, shift, or fall out during the uprighting process, avoiding pipe bending caused by manual uprighting, saving manpower, and improving work efficiency.

[0007] Preferably, the tops of the two sets of omnidirectional wheels are fixedly installed to the bottom of the frame body, and the tops of the two sets of directional wheels are fixedly installed to the bottom of the frame body. The frame body is made of welded square steel pipes, with a blank area reserved at one end for docking with the loading position of the coating machine. The two sets of omnidirectional wheels and the two sets of directional wheels are used to support the movement of the frame body and the mechanism.

[0008] Preferably, the bottom of the cylinder base is fixedly installed inside the frame body, and the top of the cylinder base is rotatably connected to one end of the cylinder body.

[0009] Preferably, the output end of the cylinder body is rotatably connected to one side of the cylinder trunnion seat, and one side of each of the two sets of lifting hinges is fixedly connected to one side of the frame body. The cylinder body is operated smoothly by controlling the intake of compressed air through the control system. After the pipe is placed horizontally and stably, the cylinder body is started to extend its piston rod, thereby gradually pushing one side of the support frame to a vertical state.

[0010] Preferably, four sets of stabilizing mechanisms are provided through the interior of the frame body. Each stabilizing mechanism includes a mounting rod, a threaded rod, and a stabilizing seat. Rotating the four sets of threaded rods causes the threaded rods to rotate inside the mounting rods. While rotating inside the mounting rods, the threaded rods move vertically, causing the stabilizing seats to move downwards until the bottom of the stabilizing seats contacts the ground. The four sets of stabilizing seats are adjusted to contact the ground in the same way. Due to the large friction between the stabilizing seats and the ground, the four sets of stabilizing seats stabilize the frame body in this position.

[0011] Preferably, the outer wall of the mounting rod is installed through the interior of the frame body, and the outer wall of the threaded rod is threadedly connected to the inner wall of the mounting rod.

[0012] Preferably, the top of the stabilizer is fixedly connected to the bottom of the threaded rod, and the stabilizer is positioned below the mounting rod.

[0013] Preferably, the limiting plate has four sets of limiting rods movably arranged inside. A clamping plate is fixedly installed on one side of every two sets of limiting rods. Pulling the clamping plate to both sides prevents one side of the clamping plate from contacting the support frame. The clamping plate drives the limiting rod to move. While one end of the limiting rod moves inside the limiting plate, it compresses the reset spring, allowing the position of the limiting mechanism to be manually adjusted.

[0014] Preferably, the outer wall of the limiting rod is provided with a return spring, and one side of the clamping plate is in contact with one side of the support frame. When the clamping plates on both sides of the limiting plate are released, the return spring rebounds and drives one end of the limiting rod to move inward into the limiting plate, so that the limiting rod drives the clamping plate to contact one side of the clamping plate.

[0015] Preferably, one end of the reset spring is fixedly connected to one side of the limiting rod, and the other end of the reset spring is fixedly connected to the inner wall of the limiting plate.

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

[0017] 1. In this invention, by setting up a lifting mechanism, using a lower limiting mechanism, a middle multi-grooved support plate, and an upper annular clamp mechanism in combination, it is ensured that long pipes do not bend, shift, or fall out during the uprighting process, avoiding pipe bending caused by manual uprighting, saving the number of workers, improving work efficiency, and using compressed air as power, avoiding the use of motors, hydraulic mechanisms, etc., which are prone to oil droplets and oil gas contamination of the casing pipe and control rod guide pipe. This structure is simple in design, easy to process and manufacture, and can meet the loading of pipes of different lengths by simply adjusting the position of the limiting mechanism. By changing the limiting mechanism, support plate, and annular clamp, it can meet the loading of pipes of different diameters.

[0018] 2. In this invention, by setting a stabilizing mechanism, the threaded rod rotates inside the mounting rod while moving vertically. The threaded rod drives the stabilizing seat to move downward until the bottom of the stabilizing seat contacts the ground. The four sets of stabilizing seats are adjusted to contact the ground in the same way. Due to the large friction between the stabilizing seat and the ground, the four sets of stabilizing seats stabilize the frame body in this position. An empty space is set at the front end of the frame body to avoid interference with the coating machine during docking. Stabilizing seats are set to ensure the stability of the mechanism after docking.

[0019] 3. In this invention, by setting a limiting mechanism, the clamping plates on both sides of the limiting plate are released, and the return spring rebounds, causing one end of the limiting rod to move inward into the limiting plate. Thus, the limiting rod causes the clamping plate to contact one side of the clamping plate, thereby fixing the two sets of clamping plates and the limiting plate at a certain position on the top of the support frame. The bottom of the pipe is inserted into the limiting groove and then fixed to the support plate and the annular clamp in sequence, so that the pipe protrudes 5-10mm from the annular clamp, making it easy to remove the pipe. The loading of pipes of different lengths can be met by simply adjusting the position of the limiting plate. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a loading mechanism for coating a full-size cladding shell and control rod guide tube of a nuclear reactor according to the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of a loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to the present invention.

[0022] Figure 3 This is a schematic diagram of the top structure of a loading mechanism for coating a full-size cladding shell and control rod guide tube of a nuclear reactor according to the present invention.

[0023] Figure 4 This is a three-dimensional structural schematic diagram of the stabilization mechanism of a loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to the present invention.

[0024] Figure 5 This is an exploded three-dimensional view of the stabilization mechanism of a loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to the present invention.

[0025] Figure 6 This is a three-dimensional structural diagram of the limiting plate of the loading mechanism for coating the full-size cladding and control rod guide tube of a nuclear reactor according to the present invention.

[0026] Figure 7 This is an exploded three-dimensional view of the limiting plate of the loading mechanism for the coating of a full-size cladding and control rod guide tube of a nuclear reactor according to the present invention.

[0027] In the diagram: 1. Frame body; 2. Casters; 3. Fixed casters; 4. Lifting mechanism; 41. Cylinder base; 42. Cylinder body; 43. Cylinder trunnion seat; 44. Support frame; 45. Lifting hinge; 5. Limiting mechanism; 51. Limiting plate; 52. Limiting groove; 53. Limiting rod; 54. Clamping plate; 55. Return spring; 6. Support plate; 7. Ring clamp; 8. Controller; 9. Stabilizing mechanism; 91. Mounting rod; 92. Threaded rod; 93. Stabilizing seat. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on 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. Example

[0029] Reference Figure 1-3 As shown: A loading mechanism for coating full-size cladding and control rod guide tubes of a nuclear reactor includes a frame body 1, two sets of omnidirectional wheels 2 and two sets of directional wheels 3. A lifting mechanism 4 is installed inside the frame body 1. The lifting mechanism 4 includes a cylinder base 41, a cylinder body 42, and a cylinder trunnion seat 43. A support frame 44 is fixedly connected to one side of the cylinder trunnion seat 43. Two sets of lifting hinges 45 are rotatably connected to one end of the support frame 44. A limiting mechanism 5 is movably installed on the top of the support frame 44. The limiting mechanism 5 includes a limiting plate 51, and multiple limiting grooves 52 are formed inside the limiting plate 51. The support frame 4... Two sets of support plates 6 are fixedly installed on the top of the support frame 44. A ring clamp 7 is fixedly installed on the top of the support frame 44. A controller 8 is fixedly installed on one side of the frame body 1. The tops of two sets of universal wheels 2 are fixedly installed to the bottom of the frame body 1. The tops of two sets of directional wheels 3 are fixedly installed to the bottom of the frame body 1. The bottom of the cylinder base 41 is fixedly installed to the inside of the frame body 1. The top of the cylinder base 41 is rotatably connected to one end of the cylinder body 42. The output end of the cylinder body 42 is rotatably connected to one side of the cylinder trunnion seat 43. One side of two sets of lifting hinges 45 is fixedly connected to one side of the frame body 1.

[0030] In this embodiment, the frame body 1 is welded from square steel pipes, with a blank area reserved at one end for docking with the loading position of the coating machine. Two sets of universal wheels 2 and two sets of directional wheels 3 are used to support the movement of the frame body 1 and the mechanism. In use, the mechanism is first moved to the loading position of the coating machine and stabilized in that position. Then, the pipes are placed horizontally on the top of the support frame 44. The limiting plate 51 is made of PVC material, with multiple parallel limiting grooves 52 machined on its side, with a diameter of 10mm and a depth of 5mm. The limiting plate 51 is positioned on the support frame 44. The adjustable position is achieved by a support plate 6, which is a PVC plate with multiple 10*10mm slots arranged side-by-side and spaced apart, with a slot spacing of 3-5mm. The sheathed pipe is placed in the square slots to prevent it from being bumped or scratched. The ring clamp 7 is a pipe clamp made of highly elastic metal with a V-shaped opening. The ring clamp 7 is fixed to the top support frame 44. When clamping the pipe, the position of the limiting mechanism 5 is adjusted according to the pipe length so that the pipe protrudes 5-10mm from the ring clamp 7 for easy pipe removal. The controller 8 has a control module inside, which controls the system. The intake of compressed air ensures the smooth operation of the cylinder body 42. After the pipe is placed horizontally and stably, the cylinder body 42 is activated to extend its piston rod, thereby gradually pushing one side of the support frame 44 to a vertical position. The support frame 44 rotates on one side of the lifting hinge 45, and both ends of the cylinder body 42 rotate on one side of the cylinder base 41 and the cylinder trunnion seat 43. The support frame 44 drives the pipe to gradually become vertical until the pipe is in a vertical position. This is achieved by setting up a lifting mechanism 4, using a lower limit mechanism 5, and a multi-grooved support plate in the middle. 6. The upper ring clamp 7 works in conjunction with the mechanism to ensure that the long pipe does not bend, shift, or fall out during the uprighting process, avoiding pipe bending caused by manual uprighting, saving the number of workers, and improving work efficiency. Compressed air is used as the power source, avoiding the use of motors and hydraulic mechanisms, which are prone to oil droplets and oil vapor contamination of the casing pipe. This structure is simple in design and easy to process and manufacture. The position of the limiting mechanism 5 can be easily adjusted to meet the loading of pipes of different lengths. By changing the limiting mechanism 5, the support plate 6, and the ring clamp 7, pipes of different diameters can be loaded. Example

[0031] Figures 1-5 As shown, four sets of stabilizing mechanisms 9 are installed through the interior of the frame body 1. Each stabilizing mechanism 9 includes a mounting rod 91, a threaded rod 92, and a stabilizing seat 93. The outer wall of the mounting rod 91 is installed through the interior of the frame body 1. The outer wall of the threaded rod 92 is threadedly connected to the inner wall of the mounting rod 91. The top of the stabilizing seat 93 is fixedly connected to the bottom of the threaded rod 92. The stabilizing seat 93 is located below the mounting rod 91.

[0032] In this embodiment, the mechanism is moved to the loading station of the coating machine. The frame body 1 is welded from square steel pipes, with a blank area reserved at one end for docking with the loading station of the coating machine. After docking, the four sets of threaded rods 92 are rotated, causing the threaded rods 92 to rotate inside the mounting rod 91. By setting a stabilizing mechanism 9, the threaded rods 92 move vertically while rotating inside the mounting rod 91. The threaded rods 92 drive the stabilizing seats 93 to move downward until the bottom of the stabilizing seats 93 contacts the ground. The four sets of stabilizing seats 93 are adjusted to contact the ground in the same way. Due to the large friction between the stabilizing seats 93 and the ground, the four sets of stabilizing seats 93 stabilize the frame body 1 in this position. A gap is set at the front end of the frame body 1 to avoid interference with the coating machine during docking. The stabilizing seats 93 are set to ensure the stability of the mechanism after docking. Example

[0033] according to Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, four sets of limiting rods 53 are movably arranged inside the limiting plate 51. A clamping plate 54 is fixedly installed on one side of every two sets of limiting rods 53. A return spring 55 is provided on the outer wall of the limiting rod 53. One side of the clamping plate 54 is in contact with one side of the support frame 44. One end of the return spring 55 is fixedly connected to one side of the limiting rod 53, and the other end of the return spring 55 is fixedly connected to the inner wall of the limiting plate 51.

[0034] In this embodiment, when clamping the pipe, the position of the limiting mechanism 5 is adjusted according to the length of the pipe, and the clamping plates 54 are pulled to both sides so that one side of the clamping plate 54 does not contact the support frame 44. The clamping plate 54 drives the limiting rod 53 to move. While one end of the limiting rod 53 moves inside the limiting plate 51, it compresses the return spring 55. After manually adjusting the position of the limiting mechanism 5, the clamping plates 54 on both sides of the limiting plate 51 are released by setting the limiting mechanism 5. The return spring 55 rebounds and drives one end of the limiting rod 53 to move inside the limiting plate 51. Thus, the limiting rod 53 drives the clamping plate 54 to contact one side of the clamping plate 54, thereby fixing the two sets of clamping plates 54 and the limiting plate 51 at a certain position on the top of the support frame 44. The bottom of the pipe is inserted into the inside of the limiting groove 52 and fixed to the support plate 6 and the ring clamp 7 in sequence, so that the pipe protrudes 75-10mm from the ring clamp, which is convenient for pipe removal. The loading of pipes of different lengths can be met by simply adjusting the position of the limiting plate 51.

[0035] The operating method and working principle of this device: The frame body 1 is welded from square steel pipes, with a blank area reserved at one end for docking with the loading position of the coating machine. Two sets of universal wheels 2 and two sets of directional wheels 3 are used to support the movement of the frame body 1 and the mechanism. In use, first move the mechanism to the loading position of the coating machine, and after docking, rotate the four sets of threaded rods 92, so that the threaded rods 92 rotate inside the mounting rods 91. While rotating inside the mounting rods 91, the threaded rods 92 move vertically, driving the stabilizing seats 93 to move downwards until the bottom of the stabilizing seats 93 contacts the ground. Adjust the four sets of stabilizing seats 93 to contact the ground in the same way. The friction between 93 and the ground is relatively large, thus the four sets of stabilizing seats 93 stabilize the frame body 1 in this position. The pipes are then placed horizontally on top of the support frame 44. The limiting plate 51 is made of PVC material, with multiple parallel limiting grooves 52 machined on the side, with a hole diameter of 10mm and a depth of 5mm. The position of the limiting plate 51 on the support frame 44 is adjustable. The support plate 6 is a PVC plate with multiple parallel and spaced 10*10mm grooves, with a groove spacing of 3-5mm. The control rod guide tube is placed in the square groove to avoid collision and scratches with the control rod guide tube. The ring clamp 7 is a pipe clamp made of high-elasticity metal with a V-shaped opening. The ring clamp 7 is fixed at the most... When clamping the pipe on the top support frame 44, adjust the position of the limiting mechanism 5 according to the pipe length, and pull the clamping plates 54 to both sides so that one side of the clamping plate 54 does not contact the support frame 44. The clamping plate 54 drives the limiting rod 53 to move. While one end of the limiting rod 53 moves inside the limiting plate 51, it compresses the return spring 55. After manually adjusting the position of the limiting mechanism 5, release the clamping plates 54 on both sides of the limiting plate 51. The return spring 55 rebounds and drives one end of the limiting rod 53 to move inside the limiting plate 51. Thus, the limiting rod 53 drives the clamping plate 54 to contact one side of the clamping plate 54, thereby realizing that the two sets of clamping plates 54 drive the limiting plate 51. 1. Fix the pipe at a certain point on the top of the support frame 44, insert the bottom of the pipe into the limiting groove 52, so that the pipe protrudes 75-10mm from the annular clamp for easy pipe removal. The controller 8 is equipped with a control module, which controls the intake of compressed air to achieve the smooth operation of the cylinder body 42. After the pipe is placed horizontally and stably, start the cylinder body 42 to extend its piston rod, thereby gradually pushing one side of the support frame 44 to a vertical state. The support frame 44 rotates on one side of the lifting hinge 45, and the two ends of the cylinder body 42 rotate on one side of the cylinder base 41 and the cylinder trunnion seat 43. The support frame 44 drives the pipe to gradually become vertical until the pipe is in a vertical state.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor, comprising a frame body (1), two sets of omnidirectional wheels (2) and two sets of directional wheels (3), characterized in that: The frame body (1) is provided with a lifting mechanism (4). The lifting mechanism (4) includes a cylinder base (41), a cylinder body (42), and a cylinder trunnion seat (43). A support frame (44) is fixedly connected to one side of the cylinder trunnion seat (43). Two sets of lifting hinges (45) are rotatably connected to one end of the support frame (44). A limiting mechanism (5) is movably installed on the top of the support frame (44). The limiting mechanism (5) includes a limiting plate (51). Multiple sets of limiting grooves (52) are opened inside the limiting plate (51). Two sets of support plates (6) are fixedly installed on the top of the support frame (44). A ring clamp (7) is fixedly installed on the top of the support frame (44). A controller (8) is fixedly installed on one side of the frame body (1).

2. The loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to claim 1, characterized in that: The tops of the two sets of universal wheels (2) are fixedly installed to the bottom of the frame body (1), and the tops of the two sets of directional wheels (3) are fixedly installed to the bottom of the frame body (1).

3. The loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to claim 1, characterized in that: The bottom of the cylinder base (41) is fixedly installed inside the frame body (1), and the top of the cylinder base (41) is rotatably connected to one end of the cylinder body (42).

4. The loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to claim 2, characterized in that: The output end of the cylinder body (42) is rotatably connected to one side of the cylinder trunnion seat (43), and one side of the two sets of lifting hinges (45) is fixedly connected to one side of the frame body (1).

5. The loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to claim 1, characterized in that: The frame body (1) has four sets of stabilizing mechanisms (9) installed inside. The stabilizing mechanism (9) includes a mounting rod (91), a threaded rod (92), and a stabilizing seat (93).

6. The loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to claim 5, characterized in that: The outer wall of the mounting rod (91) is installed through the interior of the frame body (1), and the outer wall of the threaded rod (92) is threadedly connected to the inner wall of the mounting rod (91).

7. The loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to claim 6, characterized in that: The top of the stabilizer (93) is fixedly connected to the bottom of the threaded rod (92), and the stabilizer (93) is located below the mounting rod (91).

8. The loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to claim 1, characterized in that: The limiting plate (51) is internally provided with four sets of limiting rods (53), and a clamping plate (54) is fixedly installed on one side of each pair of limiting rods (53).

9. A loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to claim 8, characterized in that: The outer wall of the limiting rod (53) is provided with a reset spring (55), and one side of the clamping plate (54) is in contact with one side of the support frame (44).

10. A loading mechanism for coating a full-size cladding and control rod guide tube of a nuclear reactor according to claim 9, characterized in that: One end of the reset spring (55) is fixedly connected to one side of the limiting rod (53), and the other end of the reset spring (55) is fixedly connected to the inner wall of the limiting plate (51).

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