Spent fuel container cover plate lifting appliance

Abstract

The utility model relates to a spent fuel container cover plate lifting appliance, and belongs to the technical field of load hanging devices attached to cranes for lifting. The lifting appliance comprises a lifting lug, a rotary drive, a lifting plate and a buffer plate, a mounting plate is welded at the bottom of the lifting lug, the mounting plate is connected with the lifting plate through a rotary drive, the edge of the lifting plate forms a downward bend, a mounting hole is formed in the lifting plate, a lifting assembly penetrates through the mounting hole, the bottom of the lifting plate is fixed to a buffer plate, the buffer plate is connected with a positioning plate through a spring, and the edge of the positioning plate extends outwards to form a bent plate; the lifting assembly comprises a top cover, a guide sleeve with a hole, a lifting screw, a locking nut with a hole, a first locking rod and a second locking rod; the size of the top cover is larger than that of the mounting hole, the top cover is connected with a holed guide sleeve, a lifting screw is sleeved in the holed guide sleeve, one end of the lifting screw is provided with a rotary interface, and the other end extends out of the holed guide sleeve; a locking nut with a hole is screwed on the outer wall of the guide sleeve with the hole; the first locking rod is inserted into the locking nut with the hole; and the second locking rod is inserted into the guide sleeve with the hole.

Description

Technical Field

[0001] This utility model relates to a spent fuel container cover lifting device, belonging to the technical field of load-bearing devices (B66C1 / 00) attached to cranes for lifting. Background Technology

[0002] The handling of spent fuel involves multiple stages, including storage, transportation, reprocessing, and deep geological disposal. Spent fuel storage is mainly divided into two methods: wet storage and dry storage. However, nuclear power plants have limited wet and dry storage capacity, which can only serve as temporary storage methods. Therefore, this spent fuel ultimately needs to be transported to spent fuel reprocessing plants or other relevant locations for further processing, making transportation an indispensable part of the process.

[0003] Spent fuel is transported using specially designed transport containers. These dedicated containers are enormous, typically weighing close to 100 tons, with the top cover alone weighing over 6 tons. Traditional manual operations are not only cumbersome but also highly risky.

[0004] Therefore, there is an urgent need for a spent fuel container cover lifting tool to ensure that the container cover can be loaded and unloaded safely and quickly, thereby reducing the radiation exposure time of operators during the loading and unloading process, which is crucial to protecting the health and safety of workers. Utility Model Content

[0005] The technical problem this invention aims to solve is: how to improve the efficiency of loading and unloading spent fuel container covers.

[0006] The technical solution proposed by this utility model to solve the above-mentioned technical problems is: a spent fuel container cover lifting device, including a lifting lug, a rotary drive, a lifting plate, a buffer plate, and a positioning plate; a mounting plate is welded to the bottom of the lifting lug, the bottom of the mounting plate is connected to the top of the lifting plate through the rotary drive, the edge of the lifting plate forms a downward bend, the lifting plate is provided with at least three mounting holes, each mounting hole is provided with a lifting component, the bottom of the lifting plate is fixed to the top of the buffer plate, the bottom of the buffer plate is connected to the top of the positioning plate through a spring, and the edge of the positioning plate extends outward with at least three bent plates;

[0007] The lifting assembly consists of a top cover, a perforated guide sleeve, a lifting screw, a perforated locking nut, a first locking rod, and a second locking rod. The top cover is larger than the size of each mounting hole and has an opening. The bottom of the top cover is connected to the perforated guide sleeve, and the lifting screw is fitted inside the perforated guide sleeve. The lifting screw slides freely within the perforated guide sleeve. One end of the lifting screw has a rotating interface that faces the opening. The other end of the lifting screw has threads on its outer wall and extends out of the perforated guide sleeve. The perforated locking nut is screwed onto the outer wall of the perforated guide sleeve below the mounting hole. One end of the first locking rod is inserted laterally into the hole of the perforated locking nut from the outside. The second locking rod is located above the mounting hole, and one end of the second locking rod is inserted laterally into the hole of the perforated guide sleeve from the outside.

[0008] Furthermore, the hanging plate is square, with the corners protruding outwards to form square corner blocks.

[0009] Furthermore, the perforated guide sleeve and the mounting hole have a 5mm gap on one side.

[0010] The beneficial effects of this utility model are as follows: Since the bottom of the buffer plate and the top of the positioning plate are connected by a spring, and the edge of the positioning plate extends outward with at least three bent plates, the positioning plate and the cover plate can be used for position alignment during the descent of the lifting device; Furthermore, since the lifting plate is provided with at least three mounting holes, and a lifting assembly consisting of a top cover, a perforated guide sleeve, a lifting screw, a perforated locking nut, a first locking rod, and a second locking rod is inserted into the mounting holes, the lifting assembly not only facilitates the lifting screw to be screwed into the cover plate from top to bottom, but also allows the lifting screw to be pressed onto the lifting plate using the perforated locking nut. Moreover, when reinstalling the cover plate, only the lifting screw needs to be unscrewed. Compared with the traditional disassembly method, the whole process is much faster, reduces the radiation exposure time of workers, and increases safety while improving loading and unloading efficiency. Attached Figure Description

[0011] The following description, in conjunction with the accompanying drawings, further illustrates a spent fuel container cover lifting device according to this utility model.

[0012] Figure 1 This is a schematic diagram of the overall structure of the spent fuel container cover lifting device in an embodiment.

[0013] Figure 2 This is a schematic diagram of the rotary drive of the spent fuel container cover lifting device in an embodiment.

[0014] Figure 3 This is a schematic diagram of the lifting plate structure of the spent fuel container cover lifting device in an embodiment.

[0015] Figure 4This is a schematic diagram showing the connection between the buffer plate and the positioning plate of the spent fuel container cover lifting device in an embodiment.

[0016] Figure 5 This is a schematic diagram of the overall structure and cross-section of the lifting assembly of the spent fuel container cover lifting device in an embodiment.

[0017] Figure 6 This is a top view of the spent fuel container cover.

[0018] Figure 7 This is a cross-sectional view of the spent fuel container cover.

[0019] In the diagram: 1. Lifting lug; 2. Rotary drive; 3. Lifting plate; 4. Buffer plate; 5. Positioning plate; 6. Mounting plate; 7. Mounting hole; 8. Lifting assembly; 9. Spring; 10. Bending plate; 11. Top cover; 12. Guide sleeve with hole; 13. Lifting screw; 14. Locking nut with hole; 15. First locking rod; 16. Second locking rod; 17. Rotary interface; 18. Cover plate; 19. Inner circle of cover plate; 20. Lifting screw hole; 21. Opening. Detailed Implementation

[0020] Example

[0021] This embodiment includes a spent fuel container cover lifting device, such as... Figure 1 , 2 As shown in Figure 4, the assembly includes a lifting lug 1, a rotary drive 2, a lifting plate 3, a buffer plate 4, and a positioning plate 5. A mounting plate 6 is welded to the bottom of the lifting lug 1. The bottom of the mounting plate 6 is connected to the top of the lifting plate 3 via the rotary drive 2. The rotary drive 2 drives the lifting plate 3 to rotate circumferentially and is an existing, readily available drive component purchased from Luoyang Longda Bearing Co., Ltd. Figure 3 As shown, in this embodiment, the hanging plate 3 is square, with outward protrusions at the corners forming square corner blocks. The edges of the hanging plate are bent downwards, which provides better support and prevents deformation of the hanging plate 3. The hanging plate 3 has four mounting holes 7, through which lifting components 8 are inserted. The bottom of the hanging plate 3 is fixed to the top of the buffer plate 4, and the bottom of the buffer plate 4 is connected to the top of the positioning plate 5 by a spring 9. The edge of the positioning plate 5 extends outwards with four bent plates 10.

[0022] like Figure 5As shown, the lifting assembly consists of a top cover 11, a perforated guide sleeve 12, a lifting screw 13, a perforated locking nut 14, a first locking rod 15, and a second locking rod 16. The top cover 11 is larger than the mounting hole 7, and has an opening 21. The bottom of the top cover 11 is connected to the perforated guide sleeve 12, and the lifting screw 13 is fitted inside the perforated guide sleeve 12. The lifting screw 13 slides freely within the perforated guide sleeve 12. One end of the lifting screw 13 has a rotating interface 17, which connects to the opening 21. The opening 21 is aligned to facilitate the use of an electric wrench to drive the lifting screw 13 to rotate via the rotating interface 17. The other end of the lifting screw 13 has threads on its outer wall and extends out of the perforated guide sleeve 12. A perforated lock nut 14 is screwed onto the outer wall of the perforated guide sleeve 12 below the mounting hole. One end of the first locking rod 15 is inserted laterally into the hole of the perforated lock nut from the outside. The second locking rod 16 is located above the mounting hole 7, and one end of the second locking rod 16 is inserted laterally into the hole of the perforated guide sleeve 12 from the outside. The perforated guide sleeve 12 and the mounting hole 7 have a 5mm gap on one side to accommodate... Figure 6 The machining error of the lifting screw hole 20 on the spent fuel container cover plate 18 shown.

[0023] like Figure 6 , 7 As shown, when actually using the lifting device of this embodiment to dismantle the cover plate of the spent fuel container, first use an existing crane connected to the lifting lug 1 to lift the lifting device above the cover plate 18, and slowly lower it until the bending part of the bending plate 10 is all fastened to the outside of the inner circle 19 of the cover plate, so that the lifting device is aligned with the cover plate 18. Then use the rotary drive 2 to adjust the circumferential position of the lifting plate 3 so that the lifting screw assembly 8 is roughly aligned with the lifting screw hole 20 on the cover plate. Then adjust the position of the perforated guide sleeve 12 so that the lower end of the lifting screw 13 is aligned with the lifting screw hole 20. Then use an electric wrench connected to the rotary interface 17 to screw the lifting screw 13 into the lifting screw hole 20. Finally, insert the first locking rod 15 into the perforated locking nut 14 and insert the second locking rod 16 into the perforated guide sleeve 12. The two locking rods rotate together to move the perforated locking nut 14 upward until the lower edge of the perforated guide sleeve 12 and the upper edge of the perforated locking nut 14 clamp the lifting plate 3.

[0024] When the cover plate 18 is reinstalled, after the cover plate 18 is placed on the spent fuel container, the lifting screw 13 has a certain space to slide freely in the perforated guide sleeve 12. Therefore, it is only necessary to use an electric wrench to unscrew the lifting screw 13 out of the lifting screw hole 20. This greatly improves work efficiency, reduces the radiation exposure time of the staff, and increases safety.

[0025] This utility model is not limited to the above embodiments. All technical solutions formed by equivalent substitutions fall within the protection scope claimed by this utility model.

Claims

1. A spent fuel container cover lifting device, comprising lifting lugs, a rotary drive, a lifting plate, a buffer plate, and a positioning plate; characterized in that... The bottom of the lifting lug is welded with a mounting plate, and the bottom of the mounting plate is connected to the top of the lifting plate through the rotary drive. The edge of the lifting plate is bent downwards. The lifting plate has at least three mounting holes, and a lifting component is inserted into each mounting hole. The bottom of the lifting plate is fixed to the top of the buffer plate. The bottom of the buffer plate is connected to the top of the positioning plate through a spring. The edge of the positioning plate extends outwards with at least three bent plates. The lifting assembly consists of a top cover, a perforated guide sleeve, a lifting screw, a perforated locking nut, a first locking rod, and a second locking rod. The top cover is larger than the size of each mounting hole and has an opening. The bottom of the top cover is connected to the perforated guide sleeve, and the lifting screw is fitted inside the perforated guide sleeve. The lifting screw slides freely within the perforated guide sleeve. One end of the lifting screw has a rotating interface that faces the opening. The other end of the lifting screw has threads on its outer wall and extends out of the perforated guide sleeve. The perforated locking nut is screwed onto the outer wall of the perforated guide sleeve below the mounting hole. One end of the first locking rod is inserted laterally into the hole of the perforated locking nut from the outside. The second locking rod is located above the mounting hole, and one end of the second locking rod is inserted laterally into the hole of the perforated guide sleeve from the outside.

2. The spent fuel container cover lifting device according to claim 1, characterized in that: The hanging plate is square, with the corners protruding outwards to form square corner blocks.

3. The spent fuel container cover lifting device according to claim 1, characterized in that: The perforated guide sleeve and the mounting hole have a 5mm gap on one side.

Images