Fuel rod lifting device

Abstract

The utility model relates to the technical field of fuel rod lifting, and discloses a fuel rod lifting device which comprises a bayonet socket and a lifting mechanism. The lifting mechanism comprises a lifting base, a moving base, a supporting frame, a lead screw transmission device, a moving assembly, a lifting cylinder, a lifting piece and a limiting block. A lifting motor is arranged at the upper end of the supporting frame; the moving assembly comprises a first reinforcing block, a moving motor, a moving gear and a rack, the lifting mechanism, the lifting motor and the lead screw transmission device are used in cooperation, the lifting cylinder and the lifting piece can be controlled to ascend and descend, and the lead screw transmission device can move horizontally through cooperation of the moving motor, the moving gear and the rack; the rotating motor, the rotating gear and the gear ring are matched to control the lifting piece to rotate and adjust the position of the lifting piece, and the lifting piece and the limiting block are matched to control the fuel rod to be lifted and replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel rod lifting, in particular to a fuel rod lifting device. Background Art

[0002] Fuel rods are key components used to generate energy in nuclear reactors. They are mainly made of fissionable materials such as uranium dioxide (UO2). These materials will fission after absorbing neutrons, releasing a large amount of energy. Fuel rods are usually encapsulated in corrosion-resistant zirconium alloy or stainless steel casings to prevent radioactive substances from leaking into the environment.

[0003] During the operation of a nuclear reactor, the fuel rods will gradually be depleted and need to be replaced. It is necessary to remove the fuel rods from the reactor and replace them with new ones. Therefore, a fuel rod lifting device is required.

[0004] The existing fuel rod lifting devices have certain drawbacks when in use. When the existing fuel rod lifting devices are in use, they usually fix the fuel rods through robotic arms or robotic grippers and then lift and replace them. However, complex structures need to be used, increasing people's economic costs. Therefore, they cannot meet people's needs. Summary of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a fuel rod lifting device, which can solve the technical problems raised in the background art.

[0007] (II) Technical Solutions

[0008] The present utility model is realized by the following technical solutions: A fuel rod lifting device is applied to a fuel tank, including a socket seat arranged on the inner bottom surface of the fuel tank and a lifting mechanism arranged on the fuel tank; wherein, a plurality of groups of placement grooves for placing fuel rods are arranged on the socket seat; the lifting mechanism includes a lifting seat detachably installed at the upper end of the fuel tank, a moving seat movably arranged at the upper end of the lifting seat, a support frame vertically arranged at the upper end of the moving seat, and a screw rod transmission device detachably installed at the bottom end surface of the support frame; a lifting motor for controlling the rotation of the screw rod transmission device is arranged at the upper end of the support frame, and the lifting motor and the screw rod transmission device cooperate to be able to lift and replace the fuel rods; the lifting mechanism further includes a moving component arranged on the moving seat, a lifting cylinder detachably installed on the screw rod transmission device, and a lifting piece detachably installed on the lifting cylinder. A plurality of groups of monitoring probes for monitoring the fuel rods are arranged on the lower end surface of the lifting cylinder, and the monitoring probes can be connected to an external control device to facilitate the lifting and replacement of the fuel rods to be replaced; a limiting block for fixing the fuel rods is movably arranged inside the lifting piece, and the limiting block and the lifting piece cooperate to be able to limit the fuel rods; the moving component includes first reinforcement blocks symmetrically arranged on the moving seat, a moving motor detachably installed on the first reinforcement blocks, and a moving gear detachably installed on the output shaft of the moving motor; a rack meshing with the moving gear is arranged on the lifting seat, and the moving motor, the moving gear and the rack cooperate to be able to control the horizontal position adjustment of the moving seat on the lifting seat.

[0009] Preferably, first grooves are symmetrically arranged at the upper end of the lifting seat, the rack is installed on the inner wall of the first grooves, a second groove corresponding to the screw rod transmission device is arranged at the upper end of the lifting seat, a sealing member is movably arranged in the second groove, a connecting sleeve sleeved with the screw rod transmission device is arranged on the sealing member, and the screw rod transmission device can drive the sealing member to move through the connecting sleeve.

[0010] Preferably, a plurality of groups of guiding sliders are symmetrically arranged on the outer surface of the sealing member, guiding chutes corresponding to the guiding sliders are arranged on the second groove, the sealing member is composed of a rigid material and a flexible material arranged in a staggered manner, and the guiding sliders can enable the sealing member to move stably.

[0011] Preferably, the lifting cylinder includes an inner cylinder detachably connected to the screw rod transmission device and an outer cylinder arranged outside the inner cylinder. Rotating members rotatably connected to the outer cylinder are arranged in a circular array on the outer wall of the inner cylinder, rotating grooves corresponding to the rotating members are arranged on the outer cylinder, and a rotating groove is arranged between the inner cylinder and the outer cylinder.

[0012] Preferably, a second reinforcing block is provided on the inner wall of the outer cylinder. A rotary motor is provided at the upper end of the second reinforcing block. A rotary gear is provided on the output shaft of the rotary motor. A toothed ring meshing with the rotary gear is provided on the outer wall of the inner cylinder. The cooperation of the rotary motor, the rotary gear and the toothed ring enables the outer cylinder to rotate around the inner cylinder.

[0013] Preferably, an installation groove for installing a lifting member is provided on the outer cylinder. An installation block is provided on the upper part of the inner wall of the installation groove. An installation rod detachably connected to the installation block is provided on the inner side of the lifting member. The cross section of the lifting member is in a "U" - shaped structure. An installation hole connected to the installation rod is provided on the installation block.

[0014] Preferably, an electric telescopic rod is provided on the rear end face of the lifting member. The output shaft of the electric telescopic rod is detachably installed with a fixing member for driving a limiting block to move. A fixing block connected to the limiting block is provided on the fixing member. The fixing block is vertically arranged on the limiting block. A fixing rod for fixing the fixing block is provided on the fixing member. Guide members are symmetrically provided on the outer wall of the fixing member. A through - groove corresponding to the fixing member is provided on the lifting member. A limiting groove corresponding to the fixing member is provided on the lifting member.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present utility model provides a fuel rod lifting device, which has the following beneficial effects:

[0017] For this fuel rod lifting device, through the arranged lifting mechanism, the cooperation of the lifting motor and the lead - screw transmission device can control the lifting and lowering of the lifting cylinder and the lifting member. The cooperation of the moving motor, the moving gear and the rack can horizontally move the lead - screw transmission device. The cooperation of the rotary motor, the rotary gear and the toothed ring can control the rotation of the lifting member to adjust the position of the lifting member. The cooperation of the lifting member and the limiting block can control the lifting and replacement of the fuel rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial structure diagram of the present utility model.

[0019] Figure 2 It is a top - view structure diagram of the lifting seat and the moving seat in the present utility model.

[0020] Figure 3 It is a partial structure diagram of the moving component in the present utility model.

[0021] Figure 4 It is a partial structure diagram of the sealing member and the connecting sleeve in the present utility model.

[0022] Figure 5 It is a partial structure diagram of the lifting member and the limiting block in the present utility model.

[0023] Figure 6 In the present utility model Figure 5 is an enlarged view of part A in it.

[0024] Figure 7 is a partial structural diagram of the lifting cylinder and the lifting member in the present utility model.

[0025] In the figure: 1, fuel tank; 2, socket; 3, lifting seat; 4, moving seat; 5, support frame; 6, screw drive device; 7, guide member; 8, lifting motor; 9, lifting cylinder; 10, lifting member; 11, limit block; 12, first reinforcement block; 13, moving motor; 14, moving gear; 15, rack; 16, seal; 17, connecting sleeve; 18, guide slider; 19, inner cylinder; 20, outer cylinder; 21, rotating member; 22, second reinforcement block; 23, rotating motor; 24, rotating gear; 25, toothed ring; 26, mounting block; 27, mounting rod; 28, fixing member; 29, fixing block; 30, electric telescopic rod. Specific embodiments

[0026] Next, in combination with the accompanying drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of no conflict, any combination can be formed among the following-described embodiments or technical features to form a new embodiment.

[0027] Embodiment 1: Please refer to Figure 1 - Figure 7, A fuel rod lifting device according to this embodiment is applied to a fuel tank 1 and includes a socket 2 provided on the inner bottom surface of the fuel tank 1 and a lifting mechanism provided on the fuel tank 1. Among them, several groups of placement grooves for placing fuel rods are provided on the socket 2. The lifting mechanism includes a lifting seat 3 detachably installed at the upper end of the fuel tank 1, a moving seat 4 movably provided at the upper end of the lifting seat 3, a support frame 5 vertically provided at the upper end of the moving seat 4, and a screw drive device 6 detachably installed at the bottom end surface of the support frame 5. A lifting motor 8 for controlling the rotation of the screw drive device 6 is provided at the upper end of the support frame 5. The cooperation between the lifting motor 8 and the screw drive device 6 can lift and replace the fuel rods. The lifting mechanism further includes a moving component provided on the moving seat 4, a lifting cylinder 9 detachably installed on the screw drive device 6, and a lifting member 10 detachably installed on the lifting cylinder 9. Several groups of monitoring probes for monitoring the fuel rods are provided on the lower end surface of the lifting cylinder 9. The monitoring probes can be connected to external control equipment to facilitate the lifting and replacement of the fuel rods to be replaced. A limiting block 11 for fixing the fuel rods is movably provided inside the lifting member 10. The cooperation between the limiting block 11 and the lifting member 10 can limit the fuel rods. The moving component includes first reinforcing blocks 12 symmetrically provided on the moving seat 4, a moving motor 13 detachably installed on the first reinforcing blocks 12, and a moving gear 14 detachably installed on the output shaft of the moving motor 13. A rack 15 meshing with the moving gear 14 is provided on the lifting seat 3. The cooperation between the moving motor 13, the moving gear 14, and the rack 15 can control the horizontal position adjustment of the moving seat 4 on the lifting seat 3. Start the moving motor 13 to drive the moving gear 14 to rotate. The moving gear 14 meshes with the rack 15, thereby driving the first reinforcing blocks 12 to move on the lifting seat 3, causing the first reinforcing blocks 12 to drive the moving seat 4 to move. The moving seat 4 drives the support frame 5 to move. The support frame 5 drives the lifting cylinder 9 to move horizontally through the screw drive device 6. Start the lifting motor 8 to drive the lifting cylinder 9 to move up and down through the screw drive device 6. The lifting cylinder 9 drives the lifting member 10 to move. Move the lifting member 10 to the position of the fuel rod so that the cooperation between the limiting block 11 and the lifting member 10 can limit the fuel rod. The cooperation between the lifting motor 8 and the screw drive device 6 can lift and replace the fuel rod.

[0028] The upper end of the lifting seat 3 is symmetrically provided with first grooves, and the rack 15 is installed on the inner wall of the first grooves. The upper end of the lifting seat 3 is provided with second grooves corresponding to the lead screw drive device 6. A seal 16 is movably arranged in the second grooves. A connecting sleeve 17 sleeved with the lead screw drive device 6 is arranged on the seal 16. The lead screw drive device 6 can drive the seal 16 to move through the connecting sleeve 17. A plurality of groups of guiding sliders 18 are symmetrically arranged on the outer surface of the seal 16. Guiding chutes corresponding to the guiding sliders 18 are arranged on the second grooves. The seal 16 is composed of a rigid material and a flexible material arranged in a staggered manner. The guiding sliders 18 can enable the seal 16 to move stably. The moving seat 4 moves on the lifting seat 3, so that the moving seat 4 drives the lead screw drive device 6 to move. The lead screw drive device 6 drives the connecting sleeve 17 to move. The connecting sleeve 17 drives the seal 16 to move. The seal 16 drives the guiding sliders 18 to slide in the guiding chutes.

[0029] The lifting cylinder 9 includes an inner cylinder 19 detachably connected to the lead screw drive device 6 and an outer cylinder 20 arranged outside the inner cylinder 19. Rotating members 21 rotatably connected to the outer cylinder 20 are arranged in a circular array on the outer wall of the inner cylinder 19. Rotating grooves corresponding to the rotating members 21 are arranged on the outer cylinder 20. A rotating groove is arranged between the inner cylinder 19 and the outer cylinder 20. Second reinforcing blocks 22 are arranged on the inner wall of the outer cylinder 20. A rotating motor 23 is arranged at the upper end of the second reinforcing block 22. A rotating gear 24 is arranged on the output shaft of the rotating motor 23. A toothed ring 25 meshing with the rotating gear 24 is arranged on the outer wall of the inner cylinder 19. The rotating motor 23, the rotating gear 24 and the toothed ring 25 cooperate to enable the outer cylinder 20 to rotate around the inner cylinder 19. Starting the rotating motor 23 drives the rotating gear 24 to rotate. The rotating gear 24 meshes with the toothed ring 25 to enable the outer cylinder 20 to rotate around the inner cylinder 19, so that the rotating members 21 rotate in the rotating grooves.

[0030] The outer cylinder 20 is provided with an installation groove for installing the lifting member 10. The upper part of the inner wall of the installation groove is provided with an installation block 26. The inner side of the lifting member 10 is provided with an installation rod 27 detachably connected to the installation block 26. The cross-section of the lifting member 10 is in a "U" shape. The installation block 26 is provided with an installation hole connected to the installation rod 27. The rear end face of the lifting member 10 is provided with an electric telescopic rod 30. The output shaft of the electric telescopic rod 30 is detachably installed with a fixing member 28 that drives the limiting block 11 to move. The fixing member 28 is provided with a fixing block 29 connected to the limiting block 11. The fixing block 29 is vertically arranged on the limiting block 11. The fixing member 28 is provided with a fixing rod for fixing the fixing block 29. The fixing member 28 is provided with a fixing groove connected to the fixing block 29. The fixing member 28 is provided with a fixing hole connected to the fixing rod. The outer wall of the fixing member 28 is symmetrically provided with guiding members 7. The lifting member 10 is provided with a through groove corresponding to the fixing member 28. The lifting member 10 is provided with a limiting groove corresponding to the fixing member 28. Fix the installation rod 27 into the installation hole, fix the lifting member 10 to the installation block 26, start the electric telescopic rod 30, drive the fixing member 28 to move, and the fixing member 28 drives the limiting block 11 to move, so that the lifting member 10 and the limiting block 11 cooperate to limit the fuel rod; detach the fixing rod from the fixing hole, detach the fixing block 29 from the fixing member 28, and detach and separate the limiting block 11 and the fixing member 28.

[0031] When the fuel rod lifting device is in use, start the moving motor 13 to drive the moving gear 14 to rotate. The moving gear 14 meshes with the rack 15, thereby driving the first reinforcement block 12 to move on the lifting seat 3, so that the first reinforcement block 12 drives the moving seat 4 to move. The moving seat 4 drives the support frame 5 to move. The support frame 5 drives the lifting cylinder 9 to move horizontally through the screw drive device 6. Start the lifting motor 8, and drive the lifting cylinder 9 to lift and lower through the screw drive device 6. The lifting cylinder 9 drives the lifting member 10 to move. Move the lifting member 10 to the position of the fuel rod, so that the limiting block 11 and the lifting member 10 cooperate to limit the fuel rod. The lifting motor 8 and the screw drive device 6 cooperate to lift and replace the fuel rod;

[0032] The moving seat 4 moves on the lifting seat 3, so that the moving seat 4 drives the screw drive device 6 to move. The screw drive device 6 drives the connecting sleeve 17 to move. The connecting sleeve 17 drives the sealing member 16 to move. The sealing member 16 drives the guiding slider 18 to slide in the guiding chute;

[0033] Start the rotating motor 23 to drive the rotating gear 24 to rotate. The rotating gear 24 meshes with the toothed ring 25, so that the outer cylinder 20 rotates around the inner cylinder 19, and the rotating member 21 rotates in the rotating groove;

[0034] Start the electric telescopic rod 30 to drive the fixing part 28 to move, and the fixing part 28 drives the limit block 11 to move, so that the lifting part 10 and the limit block 11 cooperate to limit the fuel rod; remove the fixing rod from the fixing hole, remove the fixing block 29 from the fixing part 28, and remove and separate the limit block 11 and the fixing part 28.

[0035] The fuel rod lifting device, through the setting of the lifting mechanism, the lifting motor 8 and the screw transmission device 6 are used in combination to control the lifting cylinder 9 and the lifting member 10 to be raised and lowered, the moving motor 13, the moving gear 14 and the rack 15 are used in combination to enable the screw transmission device 6 to move horizontally, the rotating motor 23, the rotating gear 24 and the gear ring 25 are used in combination to control the lifting member 10 to rotate and adjust the position of the lifting member 10, and the lifting member 10 and the limit block 11 are used in combination to control the fuel rod to be lifted and replaced.

[0036] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A fuel rod lifting device, applied to a fuel tank (1), characterized in that: include: A socket (2) arranged on the inner bottom surface of the fuel tank (1) and a lifting mechanism arranged on the fuel tank (1); Wherein, the socket (2) is provided with a plurality of groups of placement slots for placing fuel rods; The lifting mechanism comprises a lifting seat (3) detachably mounted on the upper end of the fuel tank (1), a moving seat (4) movably mounted on the upper end of the lifting seat (3), a support frame (5) vertically mounted on the upper end of the moving seat (4), and a screw transmission device (6) detachably mounted on the bottom end surface of the support frame (5); The upper end of the support frame (5) is provided with a lifting motor (8) for controlling the screw transmission device (6) to rotate; The lifting mechanism further comprises a moving assembly arranged on the moving seat (4), a lifting cylinder (9) detachably mounted on the screw transmission device (6), and a lifting member (10) detachably mounted on the lifting cylinder (9); A limiting block (11) for fixing the fuel rod is movably provided inside the lifting member (10); The moving assembly comprises a first reinforcement block (12) symmetrically arranged on the moving seat (4), a moving motor (13) detachably mounted on the first reinforcement block (12), and a moving gear (14) detachably mounted on an output shaft of the moving motor (13); The lifting seat (3) is provided with a rack (15) which meshes with the moving gear (14).

2. A fuel rod lifting device according to claim 1, characterized in that: The upper end of the lifting seat (3) is symmetrically provided with a first groove, the rack (15) is mounted on the inner wall of the first groove, the upper end of the lifting seat (3) is provided with a second groove corresponding to the screw transmission device (6), a sealing member (16) is movably provided in the second groove, and a connecting sleeve (17) is provided on the sealing member (16) and is sleeved with the screw transmission device (6).

3. A fuel rod lifting device as claimed in claim 2, characterized in that: The outer surface of the sealing member (16) is symmetrically provided with a plurality of groups of guide slide blocks (18); the second groove is provided with guide slide grooves corresponding to the guide slide blocks (18); and the sealing member (16) is composed of a rigid material and a flexible material in a staggered manner.

4. A fuel rod lifting device as claimed in claim 1, characterized in that: The lifting cylinder (9) comprises an inner cylinder (19) detachably connected to the screw transmission device (6) and an outer cylinder (20) arranged outside the inner cylinder (19); the outer wall of the inner cylinder (19) is provided with rotating parts (21) rotatably connected to the outer cylinder (20) in a circular array; and a rotating groove is provided between the inner cylinder (19) and the outer cylinder (20).

5. A fuel rod lifting device as claimed in claim 4, characterized in that: The inner wall of the outer cylinder (20) is provided with a second reinforcement block (22), the upper end of the second reinforcement block (22) is provided with a rotating motor (23), the output shaft of the rotating motor (23) is provided with a rotating gear (24), and the outer wall of the inner cylinder (19) is provided with a gear ring (25) meshing with the rotating gear (24).

6. A fuel rod lifting device as claimed in claim 4, characterized in that: The outer cylinder (20) is provided with a mounting groove for mounting the lifting member (10), a mounting block (26) is provided on the upper portion of the inner wall of the mounting groove, and a mounting rod (27) detachably connected to the mounting block (26) is provided on the inner side of the lifting member (10), and the cross section of the lifting member (10) is a "U"-shaped structure.

7. A fuel rod lifting device as claimed in claim 1, characterized in that: The rear end surface of the lifting member (10) is provided with an electric telescopic rod (30), the output shaft of the electric telescopic rod (30) is detachably mounted with a fixing member (28) for driving the limit block (11) to move, the fixing member (28) is provided with a fixing block (29) connected to the limit block (11), the outer wall of the fixing member (28) is symmetrically provided with guide members (7), and the lifting member (10) is provided with a limit groove corresponding to the fixing member (28).

Images