Hoisting device for outer sleeve of sodium-cooled fast reactor control rod

Abstract

The utility model particularly relates to a sodium-cooled fast reactor control rod outer sleeve hoisting device which comprises a crane and a hoisting device, one end of the hoisting device is connected with the crane through the weighing sensor and the hoisting belt, and the other end is in unlockable connection with the control rod outer sleeve. According to the sodium-cooled fast reactor control rod outer sleeve hoisting device disclosed by the utility model, the control rod outer sleeve in a spent fuel pool of a spent fuel plant can be safely and effectively grabbed and transferred.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting of the control rod outer sleeve of a sodium-cooled fast reactor, in particular to a lifting device for the control rod outer sleeve of a sodium-cooled fast reactor. Background Technique

[0002] During the refueling process of the control rod of the sodium-cooled fast reactor, after the control rod outer sleeve is taken out of the core during refueling, it needs to be unlocked from the control rod outer sleeve gripper in the spent fuel pool of the spent fuel building. However, the unlocked control rod outer sleeve cannot be lifted and transported alone, and a special lifting device needs to be designed to separately grasp and transfer the unlocked control rod outer sleeve. Content of the Utility Model

[0003] The purpose of the utility model is to provide a lifting device for the control rod outer sleeve of a sodium-cooled fast reactor to realize the safe and effective grasping and transfer of the control rod outer sleeve in the spent fuel pool of the spent fuel building.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A lifting device for the control rod outer sleeve of a sodium-cooled fast reactor includes a crane and a lifting device; one end of the lifting device is connected to the crane through a weighing sensor and a sling, and the other end is unlockably connected to the control rod outer sleeve.

[0006] Further, the lifting device includes a lifting ring assembly, an inner cylinder gripper assembly, an outer cylinder upper assembly, and an outer cylinder lower assembly; the lifting ring assembly is connected to the crane through a weighing sensor and a sling, and bears the lifting device and the grasped control rod outer sleeve; the outer cylinder upper assembly and the outer cylinder lower assembly are connected by a flange to form an outer cylinder assembly; the outer cylinder assembly is fixedly connected to the inner cylinder gripper assembly in the vertical direction and rotatably connected to the inner cylinder gripper assembly in the horizontal direction; the inner cylinder gripper assembly is meshed with the control rod outer sleeve, and the outer cylinder assembly is in contact connection with the control rod outer sleeve.

[0007] Further, the inner cylinder gripper assembly includes an inner cylinder operation plate, an inner cylinder upper pipe, an inner cylinder lower pipe, an inner cylinder upper connecting rod, an inner cylinder lower connecting rod, and a lower hammer body; the inner cylinder upper pipe and the inner cylinder lower pipe are connected by a flange; the inner cylinder upper connecting rod is inside the inner cylinder upper pipe, the upper end extends out of the inner cylinder upper pipe and is fixedly connected to the lifting ring assembly, and the lower end extends out of the inner cylinder upper pipe and is fixedly connected to the inner cylinder lower connecting rod; the inner cylinder operation plate is fixedly connected to the inner cylinder upper pipe; the inner cylinder lower connecting rod is inside the inner cylinder lower pipe, the upper end is fixedly connected to the lower end of the inner cylinder upper connecting rod, and the lower end extends out of the inner cylinder lower pipe; the lower hammer body is connected to the inner cylinder lower connecting rod extending out of the inner cylinder lower pipe by a pin; the lower hammer body is meshed with the control rod outer sleeve.

[0008] Further, a pipe shaft is connected to the inner cylinder upper connecting rod extending out of the inner cylinder upper pipe through a fixing pin.

[0009] Further, the upper part assembly of the outer cylinder includes an upper sleeve and an outer cylinder operation plate, and the outer cylinder operation plate is fixedly connected to the upper sleeve; the lower part assembly of the outer cylinder includes a lower sleeve, a support member, and an upper hammer body. The support member is fixedly connected to the lower sleeve, and the upper hammer body is connected to the lower sleeve through a connecting pin; the upper sleeve and the lower sleeve are connected by a flange; the upper pituitary is in contact connection with the control rod outer sleeve.

[0010] Further, the upper pituitary has a 40° cone angle structure.

[0011] Further, the hoisting device further includes a stop pin and a steel wire rope; the steel wire rope is welded to the upper sleeve, and the steel wire rope is welded to the stop pin; a pin hole matching the stop pin is provided between the upper sleeve and the upper pipe of the inner cylinder.

[0012] Further, the hoisting device for the control rod outer sleeve of the sodium-cooled fast reactor further includes two support frames. The two support frames are respectively installed on the concrete ledge beside the spent fuel pool of the sodium-cooled fast reactor through expansion bolts, and the hoisting device is divided into an upper half and a lower half and stored on the two support frames respectively.

[0013] Further, the inner cylinder gripper assembly is disconnected at the flange connection between the upper pipe and the lower pipe of the inner cylinder, and the outer cylinder assembly is disconnected at the flange connection between the upper sleeve and the lower sleeve. The flange connection between the upper pipe and the lower pipe of the inner cylinder and the flange connection between the upper sleeve and the lower sleeve are at the same horizontal position, thereby dividing the hoisting device into an upper half and a lower half.

[0014] Further, a lower pin hole is provided between the lower pipe of the inner cylinder and the lower sleeve, and an upper pin hole is provided between the upper pipe of the inner cylinder and the upper sleeve.

[0015] Further, the inner cylinder gripper assembly rotates 90° relative to the outer cylinder assembly to lock the inner cylinder gripper assembly and the control rod outer sleeve; the inner cylinder gripper assembly rotates 90° in the opposite direction relative to the outer cylinder assembly to unlock the inner cylinder gripper assembly and the control rod outer sleeve.

[0016] Further, the sling assembly is a U-shaped sling assembly.

[0017] The beneficial technical effects of the present utility model:

[0018] For the hoisting device of the control rod outer sleeve of the sodium-cooled fast reactor of the present utility model, one end of the hoisting device is connected to the crane through a weighing sensor and a sling, and the other end is unlockably connected to the control rod outer sleeve, realizing the grasping and transfer of the control rod outer sleeve. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the hoisting device of the control rod outer sleeve of the sodium-cooled fast reactor in the unlocked state;

[0020] Figure 2 It is a schematic structural diagram of the hoisting device of the control rod outer sleeve of the sodium-cooled fast reactor in the locked state;

[0021] Figure 3 It is a cross-sectional view of the hoisting device;

[0022] Figure 4 It is a schematic diagram of the locking of the hoisting device and the control rod outer sleeve;

[0023] Figure 5 It is a schematic diagram of the support seat of the upper half of the hoisting device;

[0024] Figure 6 It is a schematic diagram of the support seat of the lower half of the hoisting device;

[0025] Figure 7 It is a schematic diagram of the partial structure of the inner cylinder gripper assembly;

[0026] Figure 8 It is a schematic diagram of the partial structure of the outer cylinder assembly.

[0027] In the figure, 1. sling assembly; 2. inner cylinder gripper assembly; 3. upper outer cylinder assembly; 4. lower outer cylinder assembly; 5. fixing pin; 6. pipe shaft; 7. steel wire rope; 8. stop pin; 9. connecting pin; 10. lower hammer body; 11. support seat of the lower half of the hoisting device; 12. lower connecting rod of the inner cylinder; 13. lower pipe of the inner cylinder; 14. upper connecting rod of the inner cylinder; 15. upper pipe of the inner cylinder; 16. operation plate of the inner cylinder; 17. lower casing; 18. support member; 19. flange; 20. upper casing; 21. upper pin hole; 22. support seat of the upper half of the hoisting device. Specific embodiments

[0028] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left end", "right end", "upper side", "lower side", "outer side", "inner side", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0030] Refer to Figure 1-8 , this embodiment provides a hoisting device for the control rod outer sleeve of a sodium-cooled fast reactor, including a crane and a hoisting device; one end of the hoisting device is connected to the crane through a load cell and a sling, and the other end is unlockably connected to the control rod outer sleeve.

[0031] One end of the lifting device is connected to the crane through a weighing sensor and a sling, and the other end is locked to the outer sleeve of the control rod. The crane lifts the lifting device and the outer sleeve of the control rod to the storage place of the outer sleeve of the control rod, and then lowers the lifting device and the outer sleeve of the control rod to the storage place of the outer sleeve of the control rod, and unlocks the connection between the lifting device and the outer sleeve of the control rod, so as to realize the grasping and transfer of the outer sleeve of the control rod.

[0032] Further, the lifting device includes a lifting ring assembly 1, an inner cylinder gripper assembly 2, an upper outer cylinder assembly 3 and a lower outer cylinder assembly 4; the lifting ring assembly 1 is connected to the crane through a weighing sensor and a sling, and bears the lifting device and the grasped outer sleeve of the control rod; the upper outer cylinder assembly 3 and the lower outer cylinder assembly 4 are connected by a flange to form an outer cylinder assembly; the outer cylinder assembly is fixedly connected to the inner cylinder gripper assembly 2 in the vertical direction and rotatably connected to the inner cylinder gripper assembly 2 in the horizontal direction; the inner cylinder gripper assembly 2 is meshed with the outer sleeve of the control rod, and the outer cylinder assembly is in contact with the outer sleeve of the control rod.

[0033] The inner cylinder gripper assembly 2 and the outer cylinder assembly are in the relationship of inner sleeve and outer sleeve. By rotating the inner cylinder gripper assembly 2 to be meshed with the outer sleeve of the control rod, the locking between the inner cylinder gripper assembly 2 and the outer sleeve of the control rod is realized; by rotating the inner cylinder gripper assembly 2 to be non-meshed with the outer sleeve of the control rod, the unlocking between the inner cylinder gripper assembly 2 and the outer sleeve of the control rod is realized; by rotating the outer cylinder assembly to be in contact with the outer sleeve of the control rod, the fixation between the outer cylinder assembly and the outer sleeve of the control rod is realized, ensuring that the outer sleeve of the control rod will not rotate together when the inner cylinder gripper assembly 2 rotates, so as to realize the long-distance locking and unlocking between the inner cylinder gripper assembly 2 and the outer sleeve of the control rod underwater.

[0034] Further, the inner cylinder gripper assembly 2 includes an inner cylinder operation plate 16, an inner cylinder upper pipe 15, an inner cylinder lower pipe 13, an inner cylinder upper connecting rod 14, an inner cylinder lower connecting rod 12 and a lower hammer body 10; the inner cylinder upper pipe 15 and the inner cylinder lower pipe 13 are connected by a flange; the inner cylinder upper connecting rod 14 is inside the inner cylinder upper pipe 15, the upper end extends out of the inner cylinder upper pipe 15 and is fixedly connected to the lifting ring assembly 1, and the lower end extends out of the inner cylinder upper pipe 15 and is fixedly connected to the inner cylinder lower connecting rod 12; the inner cylinder operation plate 16 is fixedly connected to the inner cylinder upper pipe 15; the inner cylinder lower connecting rod 12 is inside the inner cylinder lower pipe 13, the upper end is fixedly connected to the lower end of the inner cylinder upper connecting rod 14, and the lower end extends out of the inner cylinder lower pipe 13; the lower hammer body 10 is connected to the inner cylinder lower connecting rod 12 extending out of the inner cylinder lower pipe 13 by a pin; the lower hammer body 10 is meshed with the outer sleeve of the control rod.

[0035] By rotating the inner cylinder operation plate 16, the lower hammer body 10 is driven to rotate; when the lower hammer body 10 rotates to be meshed with the outer sleeve of the control rod, the locking between the lower hammer body 10 and the outer sleeve of the control rod is realized; when the lower hammer body 10 rotates to be non-meshed with the outer sleeve of the control rod, the unlocking between the lower hammer body 10 and the outer sleeve of the control rod is realized.

[0036] Further, a tube shaft 6 is connected to an upper connecting rod 14 of the inner cylinder upper tube 15 of the inner cylinder through a fixing pin 5. The tube shaft 6 positions the lifting ring assembly 1 to prevent the lifting ring assembly 1 from falling onto the inner cylinder operation plate 16.

[0037] Further, the upper part assembly 3 of the outer cylinder includes an upper sleeve 20 and an outer cylinder operation plate, and the outer cylinder operation plate is fixedly connected to the upper sleeve 20; the lower part assembly 4 of the outer cylinder includes a lower sleeve 17, a support member 18 and an upper hammer body, the support member 18 is fixedly connected to the lower sleeve 17, and the upper hammer body is connected to the lower sleeve 17 through a connecting pin 9; the upper sleeve 20 and the lower sleeve 17 are connected through a flange 19; the upper pituitary body is in contact connection with the control rod outer sleeve.

[0038] Rotate the outer cylinder operation plate to drive the upper pituitary body to rotate; when the upper hammer body rotates to insert into the control rod outer sleeve and presses the control rod outer sleeve, the contact fixation between the upper pituitary body and the control rod outer sleeve is realized, ensuring that the control rod outer sleeve will not rotate together when the inner cylinder gripper assembly 2 rotates.

[0039] The inner cylinder gripper assembly 2 and the outer cylinder assembly are relatively fixed in the vertical direction through the inner cylinder operation plate, the outer cylinder operation plate and the hanging body. The inner cylinder operation plate and the outer cylinder operation plate limit the upward sliding of the outer cylinder assembly, and the hanging body limits the downward sliding of the outer cylinder assembly.

[0040] Further, the upper pituitary body has a 40° cone angle structure.

[0041] Further, the hoisting device further includes a stop pin 8 and a steel wire rope 7; the steel wire rope 7 is welded to the upper sleeve 20, and the steel wire rope 7 is welded to the stop pin 8; a pin hole matching the stop pin 8 is provided between the upper sleeve 20 and the inner cylinder upper tube 15.

[0042] Insert the stop pin 8 into the pin hole before and after the relative rotation of the inner cylinder gripper assembly 2 and the outer cylinder assembly respectively to prevent the relative rotation of the inner cylinder gripper assembly 2 and the outer cylinder assembly during the hoisting process.

[0043] Further, the sodium-cooled fast reactor control rod outer sleeve hoisting device further includes two support frames, and the two support frames are respectively installed on the concrete ledge beside the sodium-cooled fast reactor spent fuel pool through expansion bolts. The hoisting device is divided into an upper half and a lower half and stored on the two support frames respectively.

[0044] Further, the inner cylinder gripper assembly 2 is disconnected at the flange connection of the inner cylinder upper tube 15 and the inner cylinder lower tube 13, and the outer cylinder assembly is disconnected at the flange connection of the upper sleeve 20 and the lower sleeve 17. The flange connection of the inner cylinder upper tube 15 and the inner cylinder lower tube 13 and the flange connection of the upper sleeve 20 and the lower sleeve 17 are at the same horizontal position, so as to divide the hoisting device into an upper half and a lower half.

[0045] Further, a lower pin hole is provided between the lower inner tube 13 and the lower casing tube 17, and an upper pin hole 21 is provided between the upper inner tube 15 and the upper casing tube 20.

[0046] After the lifting device is divided into an upper half and a lower half, when the upper half of the lifting device is stored at the support seat 22 of the upper half of the lifting device, a fixing pin is inserted into the upper pin hole 21 to ensure that there is no relative movement or detachment between the inner tube gripper assembly 2 and the outer tube assembly of the upper half of the lifting device; when the lower half of the lifting device is stored at the support seat 11 of the lower half of the lifting device, a fixing pin is inserted into the lower pin hole to ensure that there is no relative movement or detachment between the inner tube gripper assembly 2 and the outer tube assembly of the lower half of the lifting device.

[0047] Further, the inner tube gripper assembly 2 rotates 90° relative to the outer tube assembly to lock the inner tube gripper assembly 2 with the control rod outer sleeve; the inner tube gripper assembly 2 rotates 90° in the opposite direction relative to the outer tube assembly to unlock the inner tube gripper assembly 2 from the control rod outer sleeve.

[0048] Further, the sling assembly 1 is a U-shaped sling assembly.

[0049] When using the sodium-cooled fast reactor control rod outer sleeve lifting device of the present utility model for lifting the sodium-cooled fast reactor control rod outer sleeve, the following steps are included:

[0050] 1. The operator enters the spent fuel storage pool area.

[0051] 2. Operate the 30T crane in the plant to connect the sling and the 1T electronic scale, lift the upper half of the lifting device at the support seat of the upper half of the lifting device to the support seat of the lower half of the lifting device, and then lower the upper half of the lifting device to the support seat of the lower half of the lifting device;

[0052] 3. Connect the upper and lower half flanges of the lifting device to form the lifting device; lift the lifting device, and at this time the weight shown on the electronic scale is A;

[0053] 4. Lift the lifting device to the storage location of the control rod outer sleeve, and lower the lifting device to the storage location of the control rod outer sleeve. At this time, the weight shown on the electronic scale is B;

[0054] 5. Pull out the stop pin 8; rotate the outer tube assembly to abut against the control rod outer sleeve to fix the outer tube assembly with the control rod outer sleeve; rotate the inner tube gripper assembly 2 to engage with the control rod outer sleeve to lock the inner tube gripper assembly 2 with the control rod outer sleeve; insert the stop pin 8;

[0055] 6. Lift the lifting device and the control rod outer sleeve. At this time, the weight shown on the electronic scale is C;

[0056] 7. Lift the hoisting device and the control rod outer sleeve to the storage place of the control rod outer sleeve, and lower the hoisting device and the control rod outer sleeve to the storage place of the control rod outer sleeve. At this time, the weight shown on the electronic scale is 0;

[0057] 8. Pull out the stop pin 8; Rotate the inner cylinder gripper assembly 2 until it is disengaged from the control rod outer sleeve to unlock the inner cylinder gripper assembly 2 from the control rod outer sleeve; Insert the stop pin 8; Lift the hoisting device. At this time, the weight shown on the electronic scale is A;

[0058] 9. Lift the hoisting device to the support seat of the lower half of the hoisting device, disconnect the flange connection between the upper half and the lower half of the hoisting device, and lower the lower half of the hoisting device to the support seat of the lower half of the hoisting device;

[0059] 10. Lift the upper half of the hoisting device to the support seat of the upper half of the hoisting device, and lower the upper half of the hoisting device to the support seat of the upper half of the hoisting device.

[0060] The above embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A lifting device for the outer sleeve of a control rod of a sodium-cooled fast reactor, characterized in that, It includes a crane and a hoisting device; one end of the hoisting device is connected to the crane through a weighing sensor and a sling, and the other end is unlockably connected to the control rod outer sleeve.

2. The sodium-cooled fast reactor control rod outer sleeve hoisting device according to claim 1, characterized in that, The hoisting device includes a lifting ring assembly (1), an inner cylinder gripper assembly (2), an upper outer cylinder assembly (3) and a lower outer cylinder assembly (4); the lifting ring assembly (1) is connected to the crane through a weighing sensor and a sling; the upper outer cylinder assembly (3) and the lower outer cylinder assembly (4) are connected by a flange to form an outer cylinder assembly; the outer cylinder assembly is fixedly connected to the inner cylinder gripper assembly (2) in the vertical direction and rotatably connected to the inner cylinder gripper assembly (2) in the horizontal direction; the inner cylinder gripper assembly (2) is meshed with the control rod outer sleeve, and the outer cylinder assembly is in contact connection with the control rod outer sleeve.

3. The sodium-cooled fast reactor control rod outer barrel hoisting device according to claim 2, characterized in that, The inner cylinder gripper assembly (2) includes an inner cylinder operation plate (16), an inner cylinder upper pipe (15), an inner cylinder lower pipe (13), an inner cylinder upper connecting rod (14), an inner cylinder lower connecting rod (12) and a lower hammer body (10); the inner cylinder upper pipe (15) and the inner cylinder lower pipe (13) are connected by a flange; the inner cylinder upper connecting rod (14) is inside the inner cylinder upper pipe (15), the upper end extends out of the inner cylinder upper pipe (15) and is fixedly connected to the lifting ring assembly (1), and the lower end extends out of the inner cylinder upper pipe (15) and is fixedly connected to the inner cylinder lower connecting rod (12); the inner cylinder operation plate (16) is fixedly connected to the inner cylinder upper pipe (15); the inner cylinder lower connecting rod (12) is inside the inner cylinder lower pipe (13), the upper end is fixedly connected to the lower end of the inner cylinder upper connecting rod (14), and the lower end extends out of the inner cylinder lower pipe (13); the lower hammer body (10) is connected to the inner cylinder lower connecting rod (12) extending out of the inner cylinder lower pipe (13) by a pin; the lower hammer body (10) is meshed with the control rod outer sleeve.

4. The sodium-cooled fast reactor control rod outer sleeve hoisting device according to claim 3, characterized in that, A pipe shaft (6) is connected to the inner cylinder upper connecting rod (14) extending out of the inner cylinder upper pipe (15) through a fixing pin (5).

5. The sodium-cooled fast reactor control rod outer sleeve hoisting device according to claim 3, wherein, The upper outer cylinder assembly (3) includes an upper sleeve (20) and an outer cylinder operation plate, and the outer cylinder operation plate is fixedly connected to the upper sleeve (20); the lower outer cylinder assembly (4) includes a lower sleeve (17), a support member (18) and an upper hammer body, the support member (18) is fixedly connected to the lower sleeve (17), and the upper hammer body is connected to the lower sleeve (17) by a connecting pin (9); the upper sleeve (20) and the lower sleeve (17) are connected by a flange (19); the upper pituitary is in contact connection with the control rod outer sleeve.

6. The sodium-cooled fast reactor control rod outer sleeve hoisting device according to claim 5, characterized in that, The upper pituitary has a 40° cone angle structure.

7. The sodium-cooled fast reactor control rod outer sleeve hoisting device according to claim 5, characterized in that The hoisting device further includes a stop pin (8) and a steel wire rope (7); the steel wire rope (7) is welded to the upper sleeve (20), and the steel wire rope (7) is welded to the stop pin (8); a pin hole matching the stop pin (8) is provided between the upper sleeve (20) and the inner cylinder upper pipe (15).

8. The sodium-cooled fast reactor control rod outer sleeve hoisting device according to claim 5, characterized in that, The sodium-cooled fast reactor control rod outer sleeve hoisting device further includes two support frames, and the two support frames are respectively installed on the concrete ledge beside the sodium-cooled fast reactor spent fuel pool through expansion bolts, and the hoisting device is divided into an upper half and a lower half and stored on the two support frames respectively.

9. The sodium-cooled fast reactor control rod outer sleeve hoisting device according to claim 8, wherein, The inner cylinder gripper assembly (2) is disconnected at the flange connection of the upper inner cylinder pipe (15) and the lower inner cylinder pipe (13), and the outer cylinder assembly is disconnected at the flange connection of the upper sleeve pipe (20) and the lower sleeve pipe (17). The flange connection of the upper inner cylinder pipe (15) and the lower inner cylinder pipe (13) is at the same horizontal position as the flange connection of the upper sleeve pipe (20) and the lower sleeve pipe (17).

10. The sodium-cooled fast reactor control rod outer barrel hoisting device according to claim 8, characterized in that, A lower pin hole is provided between the lower inner cylinder pipe (13) and the lower sleeve pipe (17), and an upper pin hole (21) is provided between the upper inner cylinder pipe (15) and the upper sleeve pipe (20).

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