A novel fuel basket hoisting and tilting device for fuel assemblies and its hoisting and tilting process.

Abstract

A novel fuel basket lifting and tilting device and its lifting and tilting process for fuel assemblies include: a lifting tool, a tilting device, and a crane. The lifting tool extends into the fuel basket and is detachably connected to the fuel basket via a telescopic component within the lifting tool. A fuel basket fixing frame is rotatably installed within the tilting device, and the fuel basket is fixed within the fuel basket fixing frame. Rotating the fuel basket fixing frame achieves the tilting of the fuel basket. The crane is adapted to the lifting tool, and the crane moves the fuel basket fixed on the lifting tool into the tilting device. The telescopic component of the lifting tool detachably connects the fuel basket to the fuel basket, improving the connection and separation efficiency and connection stability between the fuel basket and the lifting tool. The crane then fixes the fuel basket into the tilting device, and the tilting device tilts the fuel basket, ensuring the tilting efficiency and convenience of the fuel basket. The lifting tool and tilting device can greatly improve the convenience and efficiency of fuel basket maintenance.

Description

Technical Field

[0001] This invention belongs to the technical field of nuclear power plant refueling equipment, specifically relating to a new fuel assembly fuel basket hoisting and turning device and its hoisting and turning process. Background Technology

[0002] The new fuel lifting device is one of the key pieces of equipment for new fuel entering the pool. Its main function is to lower the new fuel assembly from the operating platform to the bottom of the spent fuel pool. In addition, it can also lift the spent fuel assembly from the bottom of the pool to the inspection and repair height when the spent fuel assembly is inspected and repaired. The fuel basket of the new fuel lifting device is lifted out every 5 fuel cycles, and the fuel basket guide wheel assembly and wire rope fixed pulley assembly are disassembled and inspected. The disadvantages of the general tools currently on the market for lifting and repairing fuel baskets are: (1) the general lifting tools cannot fix the fuel basket more stably, and the fuel basket is prone to shaking during the lifting process; (2) the fixing structure of the flipping tool for the fuel basket is relatively complicated, which is not conducive to the rapid fixing of the fuel basket; (3) the flipping structure of the flipping tool has poor stability, which is not conducive to the stable flipping of the fuel basket. Summary of the Invention

[0003] To address the above shortcomings, the technical problem to be solved by the present invention is to provide a new fuel basket hoisting and tilting device and its hoisting and tilting process for fuel assemblies, so as to improve the maintenance efficiency of fuel lifts, ensure that the new fuel lifts are hoisted efficiently and quickly, and that the tilting maintenance is safe, reliable and risk-free.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] A new fuel basket hoisting and tilting device for fuel assemblies includes:

[0006] The spreader has a telescopic component inside, and the spreader is detachably connected to the fuel basket through the telescopic component;

[0007] The flipping device has a fuel basket fixing frame rotatably installed inside it. The fuel basket is fixed inside the fuel basket fixing frame. Rotating the fuel basket fixing frame will flip the fuel basket.

[0008] A crane, which is compatible with a lifting device, is used to move the fuel basket fixed on the lifting device into the tipping device.

[0009] As a preferred embodiment of the present invention, the flipping device further includes a flipping mechanism, and the fuel basket fixing frame is provided with an installation cavity for fixing the fuel basket; the flipping mechanism is connected to the fuel basket fixing frame and drives the fuel basket fixing frame to rotate.

[0010] As a preferred embodiment of the present invention, locking plates are detachably installed at both ends of the fuel basket fixing frame to close both ends of the mounting cavity.

[0011] As a preferred embodiment of the present invention, the flipping mechanism includes a flipping frame and a flipping drive component mounted on the flipping frame. The fuel basket fixing frame is connected to the flipping drive component, and the flipping drive component drives the fuel basket fixing frame to rotate.

[0012] As a preferred embodiment of the present invention, a lifting drive component is installed inside the flipping device. The lifting drive component is connected to the flipping mechanism and drives the flipping mechanism to move up and down.

[0013] As a preferred embodiment of the present invention, the lifting device includes a lifting frame, a telescopic member, and a telescopic drive member. The telescopic member is slidably installed inside the lifting frame and the fuel basket is connected to the lifting device through the telescopic member. The telescopic drive member is connected to the telescopic member and drives the telescopic member to slide.

[0014] As a preferred embodiment of the present invention, the telescopic component includes a gear and a rack that mesh with each other, and the telescopic drive component is connected to the gear. The gear drives the rack to extend out of the hoisting frame and connect with the fuel basket.

[0015] As a preferred embodiment of the present invention, the telescopic drive component includes a drive spindle and a drive handle. The drive spindle is rotatably mounted on the hoisting frame, and the telescopic component and the drive spindle are respectively connected to the two ends of the drive spindle.

[0016] As a preferred embodiment of the present invention, the hoisting frame includes an upper support plate, a lower support block, and a load-bearing rod for connecting the upper support plate and the lower support block. The telescopic component is installed inside the lower support block, and the telescopic drive component is rotatably connected to the upper support plate and the lower support block respectively.

[0017] A new fuel basket hoisting and tilting device for fuel assemblies includes the following steps:

[0018] Step 1: Connect the crane to the spreader and lift the spreader above the fuel basket;

[0019] Step 2: Lower the crane and secure the spreader inside the fuel basket. Extend the telescopic component to connect the spreader to the fuel basket.

[0020] Step 3: The crane moves the spreader above the tilting device, and the fuel basket moves onto the tilting device along with the spreader;

[0021] Step 4: The lifting drive unit raises the fuel basket fixing frame, lowers the lifting device, places the fuel basket into the installation cavity, the telescopic component retracts, the lifting device and fuel basket separate, and the crane lifts the lifting device away from the tilting device.

[0022] Step 5: The flipping mechanism drives the fuel basket fixing frame to flip over for maintenance of the fuel basket;

[0023] Step 6: After maintenance, reset the fuel basket fixing frame, insert the lifting tool into the fuel basket, and fix the lifting tool and fuel basket. Then, use a crane to reset the overhauled fuel basket.

[0024] The beneficial effects of this invention are that by detachably connecting the fuel basket to the telescopic component of the lifting device, the connection and separation efficiency and connection stability between the fuel basket and the lifting device are improved. Then, the fuel basket is fixed into the tilting device by the crane, and the tilting device is used to tilt the fuel basket, ensuring the tilting efficiency and convenience of the fuel basket. The lifting device and the tilting device can greatly improve the maintenance convenience and efficiency of the fuel basket. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention.

[0026] Figure 2 This is a diagram illustrating the use of lifting equipment.

[0027] Figure 3 This is a structural diagram of the lifting device.

[0028] Figure 4 This is a magnified view of a portion of point A.

[0029] Figure 5 It is a cross-sectional view of the adapter between the telescopic component and the fuel basket.

[0030] Figure 6 This is a side view of the spindle locking component.

[0031] Figure 7 This is a top view of the spindle locking component.

[0032] Figure 8 This is a top view of the upper support plate.

[0033] Figure 9 This is a structural schematic diagram of the load-bearing rod fixing component.

[0034] Figure 10 This is a front view of the flipping device.

[0035] Figure 11 This is a side view of the flipping device.

[0036] Figure 12 This is a structural diagram of the frame.

[0037] Figure 13 This is a structural schematic diagram of the fuel basket fixing frame.

[0038] Reference numerals: 1. Lifting frame; 1-1. Upper support plate; 1-2. Lower support block; 1-2-1. Mounting cavity; 1-3. Load-bearing rod; 1-4. Insertion hole; 2. Telescopic component; 2-1. Gear; 2-2. Rack; 3. Telescopic drive component; 3-1. Drive spindle; 3-2. Drive handle; 4. Spindle locking component; 4-1. Spindle connecting seat; 4-2. Pin; 5. Centering adjustment component; 5. Adjusting bracket; 5-1. Adjusting plate; 5-1-1. Width adjusting rod; 5-1-2. Connecting shaft; 5-1-3. Width adjusting component; 5-2. Adjusting screw; 5-2-1. Fixing nut; 5-2-2. Roller; 5-3. Lifting ring; 6. Load-bearing rod fixing component; 7. Fixing plate; 7-1. Fixing strip; 7-2. Fuel basket; 8. Connecting through hole; 9. Centering fixing plate; 10-1. Fuel basket fixing frame; 10. Steel pipe frame. -1-1, Platform base plate 10-1-2, Limiting seat plate 10-1-3, Rotating shaft plate 10-1-4, Mounting cavity 10-2, Tilting mechanism 10-3, Locking plate 10-4, Middle part 10-4-1, Mounting platform 10-5, Pin shaft 10-6, Tilting frame 10-7, Drive component mounting plate 10-7-1, Pulley mounting plate 10-7-2, Tilting drive component 10-8, Reducer 10-10, Hand chain 10-11, Frame 10-12, Frame base 10-12-1, Vertical beam 10-12-2, Connecting crossbeam 10-12-3, Guide wheel 10-12-4, End fixing plate 10-12-5, Slide groove 10-13, Moving pulley 10-15, Lifting rope 10-16, Winch 10-17, Diagonal brace 10-18. Detailed Implementation

[0039] The present invention will now be further described with reference to the accompanying drawings.

[0040] A novel fuel basket lifting and tilting device for fuel assemblies includes: a lifting device, a tilting device 10, and a crane. The lifting device extends into the fuel basket and is detachably connected to the fuel basket via a telescopic component 2 within the lifting device. A fuel basket fixing frame 10-1 is rotatably installed within the tilting device 10, and the fuel basket is fixed within the fuel basket fixing frame 10-1. Rotating the fuel basket fixing frame 10-1 tilts the fuel basket. The crane is adapted to the lifting device and moves the fuel basket fixed on the lifting device into the tilting device 10. The telescopic component 2 of the lifting device detachably connects the fuel basket to the fuel basket, improving the connection and separation efficiency and connection stability between the fuel basket and the lifting device. The crane then fixes the fuel basket into the tilting device 10, and the tilting device 10 tilts the fuel basket, ensuring the tilting efficiency and convenience of the fuel basket. The lifting device and the tilting device 10 can greatly improve the convenience and efficiency of fuel basket maintenance.

[0041] The lifting device includes: a lifting frame 1, a telescopic component 2, and a telescopic drive component 3. The lifting frame 1 is used to install the telescopic component 2 and the telescopic drive component 3. The telescopic component 2 can be inserted into the fuel basket 8, thereby fixing the lifting device to the fuel basket 8 to be lifted, simplifying the connection parts between the lifting device and the fuel basket 8, thus greatly improving the lifting efficiency. Furthermore, the lifting device is fixed from the inside of the fuel basket 3, thereby enabling the fuel basket 3 to move vertically, facilitating the reinstallation of the fuel basket 3 after maintenance and improving reinstallation efficiency. The telescopic drive component 3 is used to drive the telescopic component 2 to extend or retract, thereby enabling the telescopic component 2 and the fuel basket 8 to connect or separate, improving the ease of assembly and disassembly.

[0042] In this embodiment, the fuel basket 8 to be hoisted and repaired is provided with a connecting through hole 8-1 at its lower end. During the hoisting process, the telescopic component 2 is inserted into the connecting through hole 8-1, thereby fixing the hoisting tool to the fuel basket 8.

[0043] The lifting frame 1 includes an upper support plate 1-1, a lower support block 1-2, and a load-bearing rod 1-3 for connecting the upper support plate 1-1 and the lower support block 1-2. The load-bearing rod 1-3 increases the length of the lifting frame 1, thereby facilitating the extension of the lifting frame 1 into the fuel basket and ensuring the lifting stability of the lifting device. The telescopic component 2 is installed in the lower support block 1-2 to ensure the stability of the telescopic component 2 during telescopic operation. The telescopic drive component 3 is rotatably connected to the upper support plate 1-1 and the lower support block 1-2 respectively.

[0044] In some preferred embodiments, the drive spindle 3-1 of the telescopic drive 3 is rotatably connected to the upper support plate 1-1 and the lower support block 1-2 via bearings.

[0045] A centering adjustment component 5 is installed on the load-bearing rod 1-3. The centering adjustment component 5 includes an adjustment bracket 5-1, a width adjustment component 5-2, and a roller 5-3. The roller 5-3 is installed on the adjustment bracket 5-1, and the width adjustment component 5-2 is connected to the adjustment bracket 5-1 to change the width of the adjustment bracket 5-1.

[0046] The adjusting bracket 5-1 includes two parallel adjusting plates 5-1-1, a width adjusting rod 5-1-2, and a connecting shaft 5-1-3. The width adjusting rod 5-1-2 is connected to the edge of the adjusting plate 5-1-1, and adjacent width adjusting rods 5-1-2 are connected by the connecting shaft 5-1-3. The roller 5-3 is installed at the end of the connecting shaft 5-1-3.

[0047] The width adjustment component 5-2 includes an adjustment screw 5-2-1 and a fixing nut 5-2-2. The adjustment plate 5-1-1 is fixed to the adjustment screw 5-2-1 by the fixing nut 5-2-2. That is, fixing nuts 5-2-2 are provided on both sides of the adjustment plate 5-1-1. By changing the relative position of the two adjustment plates 5-1-1 on the adjustment screw 5-2-1, the included angle of the adjacent width adjustment rods 5-1-2 is changed, thereby changing the extension length of the width adjustment rods 5-1-2 and realizing the width adjustment of the middle adjustment component 5.

[0048] The lower end of the upper support plate 1-1 is connected to the centering fixing plate 9. The load-bearing rod 1-3 passes through the centering fixing plate 9 and is connected to the upper support plate 1-1. The edge of the centering fixing plate 9 fits against the upper inner wall of the fuel basket 8, thereby positioning and fixing the upper end of the fuel basket 8 and ensuring the hoisting stability of the fuel basket 8 during hoisting.

[0049] In this embodiment, four lifting rings 6 are installed on the upper end of the upper support plate 1-1 to meet the operational requirements during the lifting process.

[0050] In this embodiment, four load-bearing rods 1-3 are connected between the upper support plate 1-1 and the lower support block 1-2. To ensure that the four load-bearing rods 1-3 are parallel to each other, multiple load-bearing rod fixing parts 7 are installed in the middle of the load-bearing rods 1-3.

[0051] The load-bearing rod fixing component 7 includes a fixing plate 7-1 and a fixing strip 7-2. The fixing strip 7-2 is installed on the side wall of the fixing plate 7-1. Preferably, the fixing plate 7-1 and the fixing strip 7-2 are joined together to form a through hole, and the load-bearing rod 1-3 is fixed in the through hole formed by the joining of the fixing plate 7-1 and the fixing strip 7-2.

[0052] The lower support block 1-2 has an installation cavity 1-2-1. The telescopic component 2 is arranged in the installation cavity 1-2-1. The gear 2-1 and rack 2-2 are arranged in the installation cavity 1-2-1 to provide a certain support force for the rack 2-2, thereby facilitating the connection between the rack 2-2 and the fuel basket 8.

[0053] In some preferred embodiments, rack 2-2 is mounted on the inner wall of mounting cavity 1-2-1 via a slide rail slider mechanism.

[0054] The telescopic component 2 includes a gear 2-1 and a rack 2-2 that mesh with each other. The drive spindle 3-1 of the telescopic drive component 3 is connected to the gear 2-1. Rotating the drive spindle 3-1 drives the gear 2-1 to rotate. The gear 2-1 drives the rack 2-2 to translate, so that the end of the rack 2-2 extends out of the hoisting frame 1 and is inserted into the fuel basket.

[0055] The telescopic drive component 3 includes a drive spindle 3-1 and a drive handle 3-2. The drive spindle 3-1 is rotatably mounted on the hoisting frame 1. The telescopic component 2 and the drive spindle 3-1 are respectively connected to the two ends of the drive spindle 3-1. The drive handle 3-2 facilitates the rotation of the drive spindle 3-1 and improves the convenience of manual operation.

[0056] To facilitate keeping the telescopic component 2 in the extended or retracted state, a spindle locking component 4 is installed on the outside of the drive spindle 3-1. The spindle locking component 4 is detachably connected to the upper support plate 1-1, thereby locking the drive spindle 3-1 through the spindle locking component 4.

[0057] The spindle locking component 4 includes a spindle connecting seat 4-1 and a pin 4-2 mounted on the spindle connecting seat 4-1. The spindle connecting seat 4-1 is fixed on the drive spindle 3-1. The pin 4-2 can move up and down relative to the spindle connecting seat 4-1. The pin 4-2 is adapted to the hoisting frame 1. That is, two insertion holes 1-4 are provided on the upper end face of the upper support plate 1-1 of the hoisting frame 1. The pin 4-2 can be detachably inserted into the insertion holes to lock the drive spindle 3-1. The two pin holes correspond to the two locking states of the rack 2-2 extending and retracting, respectively.

[0058] The operating steps for this lifting device are as follows:

[0059] (1) Use two slings to connect to the two lifting rings respectively, and connect the lifting equipment to the two slings respectively.

[0060] (2) Adjust the width of the centering adjustment component so that the width of the centering adjustment component is moderate and can provide guidance along the inner wall of the fuel basket when the spreader is lowered.

[0061] (3) The lifting equipment is raised so that the spreader is in a vertical position and the bottom of the spreader is above the fuel basket; the lifting equipment is lowered so that the middle adjustment component of the spreader enters the fuel basket and continues to descend slowly.

[0062] (4) Continue to slowly lower the spreader until it is fully inside the fuel basket. At this point, the lower support block of the spreader is matched with the bottom hole of the fuel basket, and the centering fixing plate has been fully inserted into the fuel basket to play a role in radial fixing.

[0063] (5) Connect the lifting equipment to the other two lifting rings to facilitate subsequent manual adjustment of the drive spindle.

[0064] (6) Manually operate the spindle locking device to pull the pin out of the insertion hole. At this time, the drive spindle can rotate freely.

[0065] (7) Manually operate the drive handle counterclockwise. At this time, the drive spindle drives the gear to rotate, thereby causing the rack to extend out of the frame. At this time, the load-bearing rack is opened.

[0066] (8) Manually operate the spindle locking device and rotate it to the locking position. At this time, the drive rod is fixed and cannot rotate freely. The fuel basket is then fixed in the middle position of the lifting device. Raise the hook and lift the fuel basket.

[0067] The flipping device 10 includes: a fuel basket fixing frame 10-1 for fixing the fuel basket, a flipping mechanism 10-3 for flipping the fuel basket from a vertical position to a horizontal position, and a frame 10-12 for mounting the flipping mechanism 10-3 and adjusting the lifting of the flipping mechanism 10-3.

[0068] The fuel basket fixing frame 10-1 includes a steel pipe frame 10-1-1, a platform base plate 10-1-2, and a limiting seat plate 10-1-3. A mounting cavity 10-2 is formed within the steel pipe frame 10-1-1. During the flipping process, the fuel basket is fixed within the mounting cavity 10-2. The platform base plates 10-1-2 are fixedly connected in pairs to the upper and lower ends of the steel pipe frame 10-1-1, with the front end of the platform base plate 10-1-2 extending out of the steel pipe frame 10-1-1. An installation platform 10-5 is formed on the upper part of the frame. The installation platform 10-5 facilitates the detachable installation of the locking plate 10-4 on the installation platform 10-5. To facilitate the disassembly and assembly of the locking plate 10-4, the limiting seat plate 10-1-3 is fixedly installed on the side wall of the steel pipe frame 10-1-1, and the limiting seat plate 10-1-3 is located above the installation platform 10-5, thereby forming a slot between the limiting seat plate 10-1-3 and the installation platform 10-5, and the locking plate 10-4 is inserted into the slot.

[0069] To facilitate quick assembly and disassembly of the locking plate 10-4, coaxial through holes are provided on the locking plate 10-4 and the mounting platform 10-5. The locking plate 10-4 is fixedly mounted on the mounting platform 10-5 by the pin 10-6.

[0070] To facilitate fixing the fuel lifting mechanism in the mounting cavity 10-2, the middle part 10-4-1 of the locking plate 10-4 extends into the mounting cavity 10-2, thereby abutting the end of the fuel lifting mechanism through the locking plate 10-4.

[0071] To facilitate the connection between the steel pipe frame 10-1-1 and the flipping mechanism 10-3, a rotating shaft plate 10-1-4 is fixedly connected to the rear end of the steel pipe frame 10-1-1, and the rotating shaft of the flipping mechanism 10-3 is connected to the rotating shaft plate 10-1-4.

[0072] The tilting mechanism 10-3 includes a tilting frame 10-7 and a tilting drive 10-8. A drive mounting plate 10-7-1 is provided on the tilting frame 10-7. The tilting drive 10-8 is fixedly connected to the tilting frame 10-7 through the drive mounting plate 10-7-1. The fuel basket fixing frame 10-1 is connected to the output shaft of the tilting drive 10-8. The tilting drive 10-8 drives the fuel basket fixing frame 10-1 to rotate, thereby switching the fuel fixing frame 10-1 between vertical and horizontal states.

[0073] The flipping drive 10-8 includes a reducer 10-10 and a hand chain 10-11. The reducer 10-10 is fixed on the drive mounting plate 10-7-1, the hand chain 10-11 is mounted on the input shaft of the reducer 10-10, and the fuel basket fixing frame 10-1 is mounted on the output shaft of the reducer 10-10. Pulling the hand chain 10-11 causes the output shaft of the reducer 10-10 to rotate, thereby causing the fuel basket fixing frame 10-1 to flip.

[0074] In this embodiment, the reducer 10-10 is a worm gear reducer. The hand chain 10-11 is connected to the worm shaft, and the turbine shaft is connected to the fuel fixing frame 10-1. The hand chain 10-11 drives the worm to rotate, the worm drives the turbine to rotate, thereby driving the turbine shaft to rotate, and the fuel fixing frame 10-1 rotates with the turbine shaft.

[0075] To facilitate the raising and lowering of the fuel lifting mechanism during maintenance, the tilting mechanism 10-3 is mounted on the frame 10-12 in a height-adjustable manner. The relative height of the tilting mechanism 10-3 is adjusted by the lifting drive component, thereby adjusting the relative height of the fuel basket fixing frame 10-1.

[0076] The frame 10-12 includes a frame base 10-12-1, vertical beams 10-12-2, and connecting crossbeams 10-12-3. The vertical beams 10-12-2 are arranged in pairs on the frame base 10-12-1. A groove 10-13 is formed between the vertical beams 10-12-2 on the same side. The tilting frame 10-7 of the tilting mechanism 10-3 is slidably installed in the groove 10-13 to facilitate the vertical lifting and lowering of the tilting frame 10-7. A connecting beam is connected between the vertical beams 10-12-2 on the same side to form a vertical beam assembly. The two ends of the connecting crossbeam 10-12-3 are respectively connected to the vertical beams 10-12-2 to prevent the tilting frame 10-7 from colliding with the connecting crossbeam 10-12-3 during the sliding process.

[0077] A lifting drive is installed on the frame 10-12. The lifting drive is connected to the tilting mechanism 10-3 and drives the tilting mechanism 10-3 to move up and down.

[0078] The lifting drive includes a movable pulley 10-15, a lifting rope 10-16, and a winch 10-17. The movable pulley 10-15 is mounted on the tilting frame 10-7 of the tilting mechanism 10-3. One end of the lifting rope 10-16 is connected to the frame 10-12, and the other end is connected to the winch 10-17. The lifting rope 10-16 is wound around the movable pulley 10-15. The winch 10-17 is used to wind up and down the lifting rope 10-16 to change the relative height of the movable pulley 10-15, thereby changing the relative height of the tilting frame 10-7. This causes the height of the fuel basket fixing frame 10-1 to change, making it easier for the reducer to drive the fuel basket fixing frame 10-1 to rotate relative to the tilting frame 10-7.

[0079] To facilitate the fixing and guiding of the lifting rope 10-16, two guide wheels 10-12-4 are installed on the upper end of the connecting beam 10-12-3 via roller seats. The guide wheels 10-12-4 change the traction direction of the lifting rope 10-16. An end fixing plate 10-12-5 is fixedly connected to the lower end face of the connecting beam 10-12-3, and the end of the lifting rope 10-16 is fixed in the through hole of the end fixing plate 10-12-5.

[0080] A pulley mounting plate 10-7-2 is fixedly connected to the upper end of the tilting frame 10-7. The movable pulley 10-15 is rotatably mounted on the pulley mounting plate 10-7-2. Since the movable pulley 10-15 can move up and down with the tilting frame 10-7, the force required for the winch 10-17 to raise and lower the lifting rope 10-16 is reduced.

[0081] A diagonal brace 10-18 is fixed on the frame 10-12. The diagonal brace 10-18 is fixed on one side of the vertical beam 10-12-2 and the rear end face of the vertical beam 10-12-2 to improve the stability of the frame 10-12.

[0082] The method for using this flip tool is as follows:

[0083] (1) Use winch 10-17 to raise fuel basket fixing frame 10-1 to a suitable height, adjust the hand chain on worm gear reducer 10-10 to make fuel basket fixing frame 10-1 vertical, pull out pin 10-6 on fuel basket fixing frame 10-1, and remove locking plate 10-4.

[0084] (2) Use hoisting tools to lift the fuel basket and install it into the fuel basket fixing frame 10-1 without the locking plate 10-4 installed.

[0085] (3) Insert the locking plate 10-4 into the fuel basket fixing frame 10-1 and insert the pin 10-6 to fix the fuel basket.

[0086] (4) Pull the hand chain to drive the worm gear reducer 10-10 to work. The worm gear reducer 10-10 drives the fuel basket fixing frame 10-1 to rotate relative to the tilting frame 10-7, tilting the fuel basket fixing frame 10-1 and the fuel basket together to the horizontal.

[0087] (5) Operate the winch to lower the fuel basket fixing frame 10-1 and the fuel basket to the bottom for maintenance.

[0088] A new fuel basket hoisting and tilting device for fuel assemblies includes the following steps:

[0089] Step 1: Connect the crane to the spreader and lift the spreader above the fuel basket;

[0090] Step 2: Lower the crane and secure the spreader inside the fuel basket. Extend the telescopic component to connect the spreader to the fuel basket.

[0091] Step 3: The crane moves the spreader above the tilting device, and the fuel basket moves onto the tilting device along with the spreader;

[0092] Step 4: The lifting drive unit raises the fuel basket fixing frame, lowers the lifting device, places the fuel basket into the installation cavity, the telescopic component retracts, the lifting device and fuel basket separate, and the crane lifts the lifting device away from the tilting device.

[0093] Step 5: The flipping mechanism drives the fuel basket fixing frame to flip over for maintenance of the fuel basket;

[0094] Step 6: After maintenance, reset the fuel basket fixing frame, insert the lifting tool into the fuel basket, and fix the lifting tool and fuel basket. Then, use a crane to reset the overhauled fuel basket.

[0095] During the above-mentioned hoisting and flipping process, the fuel basket and the hoisting device are quickly fixed and separated by the telescopic components inside the spreader, which greatly improves the hoisting efficiency of the fuel basket. At the same time, the fuel basket is flipped by the flipping mechanism, which can greatly improve the efficiency of fuel basket maintenance.

[0096] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0097] Although this document makes extensive use of terms corresponding to the figure labels, the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the essence of the invention; interpreting them as any kind of additional limitation would be contrary to the spirit of the invention.

Claims

1. A new fuel basket hoisting and tilting device for fuel assemblies, characterized in that, include: The spreader is equipped with a telescopic component (2), and the spreader is detachably connected to the fuel basket through the telescopic component (2); The flipping device (10) has a fuel basket fixing frame (10-1) rotatably installed inside it. Locking plates (10-4) are detachably installed at both ends of the fuel basket fixing frame (10-1). The fuel basket is fixed inside the fuel basket fixing frame (10-1) by the locking plates (10-4). The fuel basket is flipped by rotating the fuel basket fixing frame (10-1). Crane, the crane is adapted to the lifting device, and the fuel basket fixed on the lifting device is moved into the tilting device (10) by the crane; The flipping device (10) also includes a flipping mechanism (10-3), and the fuel basket fixing frame (10-1) is provided with an installation cavity (10-2) for fixing the fuel basket; the flipping mechanism (10-3) is connected to the fuel basket fixing frame (10-1) and drives the fuel basket fixing frame (10-1) to rotate; The lifting device includes a lifting frame (1) and a telescopic drive component (3). The telescopic component (2) is slidably installed inside the lifting frame (1) and the fuel basket is connected to the lifting device through the telescopic component (2). The telescopic drive component (3) is connected to the telescopic component (2) and drives the telescopic component (2) to slide. The telescopic component (2) includes a gear (2-1) and a rack (2-2) that mesh with each other. The telescopic drive component (3) is connected to the gear (2-1) and drives the rack (2-2) to extend out of the hoisting frame (1) through the gear (2-1) and connect with the fuel basket. The telescopic drive component (3) includes a drive spindle (3-1) and a drive handle (3-2). The drive spindle (3-1) is rotatably mounted on the hoisting frame (1). The telescopic component (2) and the drive handle (3-2) are respectively connected to the two ends of the drive spindle (3-1). The hoisting frame (1) includes an upper support plate (1-1), a lower support block (1-2), and a load-bearing rod (1-3) for connecting the upper support plate (1-1) and the lower support block (1-2). The telescopic component (2) is installed inside the lower support block (1-2), and the telescopic drive component (3) is rotatably connected to the upper support plate (1-1) and the lower support block (1-2) respectively. A centering adjustment assembly (5) is installed on the load-bearing rod (1-3). The centering adjustment assembly (5) includes an adjustment bracket (5-1), a width adjustment component (5-2), and a roller (5-3). The roller (5-3) is installed on the adjustment bracket (5-1), and the width adjustment component (5-2) is connected to the adjustment bracket (5-1) to change the width of the adjustment bracket (5-1). The adjusting bracket (5-1) includes two parallel adjusting plates (5-1-1), a width adjusting rod (5-1-2), and a connecting shaft (5-1-3). The width adjusting rod (5-1-2) is connected to the edge of the adjusting plate (5-1-1), and adjacent width adjusting rods (5-1-2) are connected by the connecting shaft (5-1-3). The roller (5-3) is installed at the end of the connecting shaft (5-1-3). The width adjustment component (5-2) includes an adjustment screw (5-2-1) and a fixing nut (5-2-2). The adjustment plate (5-1-1) is fixed on the adjustment screw (5-2-1) by the fixing nut (5-2-2). Fixing nuts (5-2-2) are provided on both sides of the adjustment plate (5-1-1). By changing the relative position of the two adjustment plates (5-1-1) on the adjustment screw (5-2-1), the included angle of the adjacent width adjustment rods (5-1-2) is changed, thereby changing the extension length of the width adjustment rods (5-1-2) and realizing the width adjustment of the centering adjustment component (5).

2. The fuel basket hoisting and tilting device for a new fuel assembly according to claim 1, characterized in that, The tilting mechanism (10-3) includes a tilting frame (10-7) and a tilting drive (10-8) mounted on the tilting frame (10-7). The fuel basket fixing frame (10-1) is connected to the tilting drive (10-8), and the fuel basket fixing frame (10-1) is driven to rotate by the tilting drive (10-8).

3. The fuel basket hoisting and tilting device for a new fuel assembly according to claim 2, characterized in that, The tilting drive (10-8) includes a reducer (10-10) and a hand chain (10-11). The hand chain (10-11) is mounted on the input shaft of the reducer (10-10), and the fuel basket fixing frame (10-1) is mounted on the output shaft of the reducer (10-10).

4. The fuel basket hoisting and tilting device for a new fuel assembly according to claim 1, characterized in that, The flipping device (10) is equipped with a lifting drive component, which is connected to the flipping mechanism (10-3) to drive the flipping mechanism (10-3) to move up and down.

5. The hoisting and tilting process of the fuel basket hoisting and tilting device for a new fuel assembly according to claim 4, characterized in that, Includes the following steps, Step 1: Connect the crane to the spreader and lift the spreader above the fuel basket; Step 2: Lower the crane and secure the spreader inside the fuel basket. Extend the telescopic component to connect the spreader to the fuel basket. Step 3: The crane moves the spreader above the tilting device, and the fuel basket moves onto the tilting device along with the spreader; Step 4: The lifting drive unit raises the fuel basket fixing frame, lowers the lifting device, places the fuel basket into the installation cavity, the telescopic component retracts, the lifting device and fuel basket separate, and the crane lifts the lifting device away from the tilting device. Step 5: The flipping mechanism drives the fuel basket fixing frame to flip over for maintenance of the fuel basket; Step 6: After maintenance, reset the fuel basket fixing frame, insert the lifting tool into the fuel basket, and fix the lifting tool and fuel basket. Then, use a crane to reset the overhauled fuel basket.

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