Spent fuel assembly pusher

Abstract

The embodiment of the present application relates to the technical field of spent fuel reprocessing, and particularly discloses a spent fuel assembly pushing device for pushing spent fuel assemblies to a shearing device. The pushing device comprises a power assembly, a transmission shaft, one end of the transmission shaft being connected with the power assembly, the power assembly being used for driving the transmission shaft to rotate, a chain assembly, the chain assembly being in transmission connection with the other end of the transmission shaft, the transmission shaft being used for driving the chain assembly to reciprocate, a pushing feeder, the pushing feeder being used for being connected with an external rotary feeder, the rotary feeder being used for accommodating the spent fuel assemblies, and a pushing assembly, the pushing assembly being arranged in the pushing feeder, the pushing assembly being connected with the chain assembly, the chain assembly being used for driving the pushing assembly to move in the pushing feeder and the rotary feeder, so as to push the spent fuel assemblies in the rotary feeder to move to the shearing device.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of spent fuel reprocessing technology, and specifically to a spent fuel assembly delivery device. Background Technology

[0002] The reprocessing of spent fuel assemblies generally includes shearing, chemical dissolution of fuel segments, chemical separation, and tail-end treatment of uranium and plutonium. During shearing, the shearing system breaks down the spent fuel assembly and provides processable spent fuel fragments for subsequent dissolution processes. Before shearing begins, the spent fuel assembly from the charging hot chamber needs to be conveyed to the shearing system to perform the shearing. Summary of the Invention

[0003] Embodiments of the present invention provide a spent fuel assembly pushing device for pushing spent fuel assemblies to a shearing device. The pushing device includes: a power assembly; a drive shaft, one end of which is connected to the power assembly, the power assembly driving the drive shaft to rotate; a chain assembly, the chain assembly being drively connected to the other end of the drive shaft, the drive shaft driving the chain assembly to reciprocate; a pushing hopper, connected to an external rotating hopper, the rotating hopper containing the spent fuel assemblies; and a pushing component, disposed within the pushing hopper and connected to the chain assembly, the chain assembly driving the pushing component to move within the pushing hopper and the rotating hopper, thereby pushing the spent fuel assemblies in the rotating hopper to the shearing device.

[0004] In this embodiment of the invention, the power component drives the chain assembly to move within the pushing bin and the rotating bin, thereby moving the pushing component and pushing the spent fuel assembly within the rotating bin. This allows the spent fuel assembly to move to the shearing device, thus achieving the pushing of the spent fuel assembly. The chain assembly can move in a step-like manner; by controlling the movement distance of the chain assembly, the pushing distance of the spent fuel assembly can be precisely controlled, ensuring that the spent fuel assembly enters the shearing device at a predetermined length, facilitating its cutting into short segments of a predetermined length. Attached Figure Description

[0005] Other objects and advantages of the invention will become apparent from the following description of embodiments of the invention with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the invention.

[0006] Figure 1 This is a schematic diagram of the structure of a pushing device according to an embodiment of the present invention.

[0007] Figure 2 This is a schematic diagram of the structure of a power assembly and a drive shaft according to an embodiment of the present invention.

[0008] Figure 3 yes Figure 2 Enlarged view of the power unit.

[0009] Figure 4 This is a schematic diagram of the structure of a transmission shaft according to an embodiment of the present invention.

[0010] Figure 5 This is a cross-sectional view of a drive shaft according to an embodiment of the present invention.

[0011] Figure 6 This is a schematic diagram of the structure of the drive shaft, chain assembly, and push assembly according to an embodiment of the present invention.

[0012] Figure 7 This is a schematic diagram of the structure of a push component according to an embodiment of the present invention.

[0013] Figure 8 This is a schematic diagram of the structure of a chain according to an embodiment of the present invention.

[0014] Figure 9 This is a schematic diagram of the structure of a chain assembly according to an embodiment of the present invention.

[0015] Figure 10 This is a schematic diagram of the structure of an inner chain box according to an embodiment of the present invention.

[0016] Figure 11 This is a half-sectional view of the inner chain box according to an embodiment of the present invention.

[0017] Figure 12 yes Figure 11 A structural schematic diagram of the inner chain box from another perspective.

[0018] Figure 13 This is a structural schematic diagram of an outer chain box and a support base according to an embodiment of the present invention.

[0019] Figure 14 This is a schematic diagram of the structure of a push connection part according to an embodiment of the present invention.

[0020] Figure 15 This is a schematic diagram of the structure of the pusher part according to an embodiment of the present invention.

[0021] Figure 16 This is a schematic diagram of a pushing device according to an embodiment of the present invention.

[0022] Figure 17 This is a schematic diagram of the structure of a coupling according to an embodiment of the present invention.

[0023] Figure 18 yes Figure 17 A structural schematic diagram of the coupling from another perspective.

[0024] Figure 19 This is a schematic diagram of a coupling in a connected state according to an embodiment of the present invention.

[0025] Figure 20 This is a schematic diagram of a coupling in an open state according to an embodiment of the present invention.

[0026] Figure 21 This is a schematic diagram of the structure of an air intake assembly according to an embodiment of the present invention.

[0027] Figure 22 yes Figure 21 Cross-sectional view of the middle air intake assembly.

[0028] Figure 23 This is a schematic diagram of the structure of an inflatable sealing assembly according to an embodiment of the present invention.

[0029] Figure 24 This is a schematic diagram of the installation of an inflatable sealing assembly and a pusher hopper according to an embodiment of the present invention.

[0030] Figure 25 This is a schematic diagram of the structure of a locking assembly according to an embodiment of the present invention.

[0031] Figure 26 This is a cross-sectional view of a locking assembly according to an embodiment of the present invention.

[0032] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only one embodiment of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.

[0034] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by a person with ordinary skill in the art to which this application pertains. Where the terms "first," "second," etc., are used throughout the text, they are used only to distinguish similar objects and should not be construed as indicating or implying their relative importance, order of precedence, or implicitly specifying the number of technical features indicated. It should be understood that the data described by "first," "second," etc., can be interchanged where appropriate. Where "and / or" appears throughout the text, it means including three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. Furthermore, for ease of description, spatial relative terms such as "above," "below," "top," "bottom," etc., may be used here, only to describe the spatial positional relationship between one device or feature as shown in the figure and other devices or features. It should be understood that this also includes different orientations in use or operation besides those shown in the figure.

[0035] The inventors of this invention have discovered that in conventional spent fuel shearing systems, spent fuel assemblies from the charging hot chamber enter the shearing device with the bottom end facing forward for shearing. However, during the shearing process, cutting the spent fuel assembly into short segments of a predetermined length to better dissolve the fuel core within the spent fuel assembly casing requires precise control of the pushing distance of the spent fuel assembly. Therefore, embodiments of this invention provide a spent fuel assembly pushing device to push the spent fuel assembly into the shearing device for shearing.

[0036] like Figure 1 As shown, the spent fuel assembly pushing device in this embodiment of the invention includes a power assembly 100, a drive shaft 200, a chain assembly, a pushing bin 400, and a pushing component. One end of the drive shaft 200 is connected to the power assembly 100, which drives the drive shaft 200 to rotate. The chain assembly is connected to the other end of the drive shaft 200, which drives the chain assembly to reciprocate. The pushing bin 400 is connected to an external rotating bin, which contains the spent fuel assembly. The pushing component is disposed within the pushing bin 400 and is connected to the chain assembly. The chain assembly drives the pushing component to move within the pushing bin 400 and the rotating bin, thereby pushing the spent fuel assembly within the rotating bin to the shearing device.

[0037] In this embodiment of the invention, a push hopper 400 is provided, which can dock with a rotating hopper, thereby sealing the feeding channel of the spent fuel assembly and preventing dust from escaping. A power component 100 drives a chain assembly to move within the push hopper 400 and the rotating hopper, thereby moving the push assembly and pushing the spent fuel assembly within the rotating hopper to the shearing device, thus achieving the pushing of the spent fuel assembly. The chain assembly can move in a step-like manner; by controlling the movement distance of the chain assembly, the pushing distance of the spent fuel assembly can be precisely controlled, allowing the spent fuel assembly to enter the shearing device at a predetermined length, facilitating its cutting into short segments of a predetermined length.

[0038] like Figure 2 and Figure 3 As shown, in some embodiments, the power assembly 100 includes a driver 110 and a reducer 120. The driver 110 provides power to the drive shaft 200, and the reducer 120 is connected between the driver 110 and the drive shaft 200. The reducer 120 transmits the power from the driver 110 to the drive shaft 200 while reducing the rotational speed so that the rotational speed of the drive shaft 200 meets the requirements. In some embodiments, the driver 110 is a motor, such as a servo motor.

[0039] Furthermore, a coupling 130 is connected between the driver 110 and the reducer 120. The coupling 130 can compensate for the misalignment between the output shaft of the driver 110 and the input shaft of the reducer 120, and also has a buffering and vibration damping function. For example, the coupling 130 in this embodiment can be a flexible coupling.

[0040] Since the chain assembly and pusher assembly are used to push spent fuel assemblies and are radioactive, the pusher hopper 400, chain assembly, and pusher assembly are located in the feeding hot chamber to shield the spent fuel assemblies from radioactive radiation, thus providing protection. In some embodiments, the power assembly 100 is located outside the radioactive environment where the pusher hopper 400, chain assembly, and pusher assembly are located; for example, the power assembly 100 is located outside the feeding hot chamber, thereby preventing the power assembly 100 from being affected by radioactive radiation and thus ensuring its normal operation.

[0041] like Figure 4 and Figure 5 As shown, the drive shaft 200 includes a solid shaft 210, a hollow shaft 220, and a fixing part 230. The solid shaft 210 is connected to the power assembly 100, and the hollow shaft 220 is connected between the solid shaft 210 and the chain assembly 300. The solid shaft 210 is rotatably fitted into the fixing part 230, which is configured to penetrate through the external wall. The fixing part 230 is used to install the solid shaft 210 in the external wall, and the external wall is used to isolate the power assembly 100 from the radioactive environment.

[0042] In this embodiment, the external wall can be the wall of the feeding hot chamber, and the drive shaft 200 passes through the external wall to transmit the power provided by the power assembly 100 outside the feeding hot chamber to the chain assembly inside the feeding hot chamber.

[0043] In this embodiment, the solid shaft 210 penetrates the external wall, while the hollow shaft 220 is suspended between the external wall and the chain assembly. Using a solid shaft 210 for the portion penetrating the wall increases the strength and torsional resistance of the drive shaft 200, while using a hollow shaft 220 for the suspended portion reduces deflection caused by the drive shaft 200's own weight, effectively ensuring the drive shaft 200's levelness. Furthermore, the solid shaft 210 and the hollow shaft 220 can be connected by welding.

[0044] In this embodiment, the fixing part 230 wraps around the solid shaft 210, allowing the solid shaft 210 to rotatably penetrate the outer wall. Figure 5 As shown, in some embodiments, the fixing part 230 includes a first fixing part 231, a second fixing part 232, and a support part 233. The first fixing part 231 is disposed within the outer wall, and the second fixing part 232 is detachably fixed within the first fixing part 231, and the second fixing part 232 is sleeved on the outside of the solid shaft 210. The support part 233 is disposed between the second fixing part 232 and the solid shaft 210, and the support part 233 is configured to rotatably support the solid shaft 210 within the second fixing part 232.

[0045] In this embodiment, the solid shaft 210 is encased in a first fixing part 231 and a second fixing part 232. This not only allows the solid shaft 210 to be stably and rotatably supported in the external wall, but also enables the disassembly and assembly of the drive shaft 200. During disassembly, the connection between the drive shaft 200 and the chain assembly is first disconnected, then the connection between the first fixing part 231 and the second fixing part 232 is disconnected, and finally the second fixing part 232 and the drive shaft 200 are removed together from the external wall, thus disassembling the drive shaft 200.

[0046] For example, the first fixing part 231 is fitted into the outer wall, and the first fixing part 231 and the second fixing part 232 are detachably connected by fasteners, thereby enabling the disassembly of the first fixing part 231 and the second fixing part 232. Furthermore, the second fixing part 232 can also be connected to the solid shaft 210 by fasteners. For example, the first fixing part 231 is a first bushing, the second fixing part 232 is a second bushing, the support part 233 is a bearing, and the fastener is a bolt.

[0047] During disassembly, first disconnect the drive shaft 200 from the chain assembly. Then, remove the bolts connecting the first fixing part 231 and the second fixing part 232. Next, attach a sealing bag to the end of the first fixing part 231 to shield against nuclear radiation in the feeding hot chamber. Finally, pull the second fixing part 232 and the drive shaft 200 together from the outer wall into the sealing bag to disassemble the drive shaft 200.

[0048] like Figure 6 and Figure 7 As shown, in some embodiments, the chain assembly 300 includes a sprocket 310 and a chain 320. The sprocket 310 is disposed within the push hopper 400 and is connected to a drive shaft 200, which drives the sprocket 310 to rotate. The chain 320 is connected to the push assembly 600, and the chain 320 cooperates with the sprocket 310. The rotation of the sprocket 310 drives the chain 320 to move, thereby driving the push assembly 600 to move. The movement of the push assembly 600 pushes the spent fuel assembly, thus realizing the pushing of the spent fuel assembly.

[0049] In some embodiments, the sprocket 310 includes a sprocket shaft 311 and a sprocket body 312. The sprocket shaft 311 is connected to a drive shaft 200, which drives the sprocket shaft 311 to rotate. The sprocket body 312 is sleeved outside the sprocket shaft 311, and the sprocket shaft 311 drives the sprocket body 312 to rotate. The sprocket body 312 cooperates with a chain 320, and the rotation of the sprocket body 312 drives the chain 320 to move.

[0050] like Figure 8 As shown, in some embodiments, the chain 320 includes a plurality of first chain plates 321, a plurality of second chain plates 322, and a plurality of pins 323. The plurality of first chain plates 321 cooperate with each other, the plurality of second chain plates 322 cooperate with each other, and the first chain plates 321 and second chain plates 322 are fixedly connected by pins 323. In this embodiment, the chain 320 includes a plurality of chain plates that cooperate with each other, allowing the movement of the chain 320 to be controlled in units of the length of one chain plate. In some embodiments, by controlling the chain plates in the chain 320, the chain 320 can be driven to turn. In some embodiments, the plurality of first chain plates 321 are symmetrically arranged at both ends of the pin 323, and the plurality of second chain plates 322 are symmetrically arranged at both ends of the pin 323.

[0051] In some embodiments, the first chain plate 321 is disposed outside the second chain plate 322. In some embodiments, the mating connections of the plurality of first chain plates 321 and the mating connections of the plurality of second chain plates 322 are staggered, that is, the plurality of first chain plates 321 and the plurality of second chain plates 322 do not overlap, which allows for more precise control of the movement and turning of the chain 320.

[0052] In some embodiments, the first chain plate 321 and the second chain plate 322 are rigid plates. Setting the first chain plate 321 and the second chain plate 322 as rigid plates can smoothly and accurately transmit the thrust or tension of the chain 320.

[0053] like Figure 7 As shown, in some embodiments, the sprocket 310 is provided with a plurality of receiving grooves 313, which are evenly distributed along the circumference of the sprocket 310. A pin 323 engages with the receiving groove 313, allowing the rotation of the sprocket 310 to drive the pin 323 to move, thereby driving the chain 320 to move. In some embodiments, the receiving groove 313 is located within the sprocket body. When the sprocket 310 rotates, the pin 323 located within the receiving groove 313 moves with the rotation of the sprocket 310, thereby driving the chain 320 to move. Simultaneously, the movement of the chain 320 can drive subsequent pins 323 into the receiving groove 313 of the sprocket 310, allowing the chain 320 to move continuously. Furthermore, the inner surface of the receiving groove 313 is inclined to facilitate the entry of the pin 323 into the receiving groove 313.

[0054] like Figure 9 and Figure 10 As shown, in some embodiments, the chain assembly 300 further includes an inner chain box 330 and an outer chain box 340. The chain 320 is disposed in the inner chain box 330, which is provided with a track. The chain 320 is positioned on the track and can move along the track. The outer chain box 340 is configured to accommodate the inner chain box 330, and a gap is provided between the inner chain box 330 and the outer chain box 340 to allow the inner chain box 330 to directly disengage through the gap. Both the inner chain box 330 and the outer chain box 340 are provided with liquid flow structures to allow liquid used for rinsing the chain assembly 300 to flow out from the outer chain box 340 via the inner chain box 330. This embodiment, through the combination of the inner chain box 330, outer chain box 340, chain 320, and liquid flow structures, allows for convenient cleaning of the chain assembly 300.

[0055] like Figure 11 and Figure 12 As shown, in some embodiments, the inner chain box 330 includes an inner plate 331 and an outer plate 332. The inner plate 331 is provided with a track 334, and a chain 320 is disposed on the track 334 and can move along the track 334. The liquid flow structure includes an opening 335 formed on the outer plate 332.

[0056] In some embodiments, the track 334 may be annular, including straight segments and curved segments, and is disposed around the inner side of the inner plate 331. In some embodiments, the annular track 334 may be configured to wrap around the inner plate 331 multiple times. In some embodiments, the track 334 may be a guide groove on the inner plate 331. For example, a guide groove may be provided on the outer surface of the inner plate 331, and the guide groove may be configured to wrap around the inner plate 331 multiple times, with the guide groove serving as the track 334, and the chain 320 disposed in the guide groove and movable along the guide groove.

[0057] In some embodiments, the track 334 may include straight segments and curved segments. The lengths of the first chain plate 321 and the second chain plate 322 of the chain 320 are both less than the length of the straight segment of the track 334, and the lengths of the first chain plate 321 and the second chain plate 322 are both less than the radius of the curved segment of the track 334, thereby enabling the chain 320 to turn. In some embodiments, when the chain 320 moves, the length of the first chain plate 321 or the second chain plate 322 may be considered as a unit of movement.

[0058] In some embodiments, the mating connections of multiple first chain plates 321 and multiple second chain plates 322 are staggered. The distance between the staggered mating connections of the first chain plates 321 and the second chain plates 322 is less than the length of the straight segment of the track 334, and the distance between the staggered mating connections of the first chain plates 321 and the second chain plates 322 is less than the radius of the curved segment of the track 334. This facilitates turning of the chain 320 and allows for precise control of its movement. In some embodiments, when the chain 320 moves, the distance between the staggered mating connections of the first chain plates 321 and the second chain plates 322 can be considered as a unit of movement. Through the above-described structural arrangement of the chain 320, the length of the pushed spent fuel assembly can be precisely controlled.

[0059] In some embodiments, a bushing 3231 is provided at a position between the first chain plate 321 and the second chain plate 322 on the pin 323, and the bushing 3231 cooperates with the track 334; a roller 3232 is provided at a position outside the first chain plate 321 or the second chain plate 322 on the pin 323. By providing the bushing 3231, the wear of the chain 320 during movement can be reduced. By providing the roller 3232, the smoothness of the chain 320 during movement can be enhanced.

[0060] In some embodiments, the track 334 can be a guide groove that passes through the inner plate 331. A plurality of first chain plates 321 and second chain plates 322 connected in pairs are respectively distributed on both sides of the guide groove. The first chain plate 321 is disposed outside the second chain plate 322, and the roller 3232 is disposed outside the first chain plate 321 and connected to the first chain plate 321.

[0061] In some embodiments, when cleaning the chain assembly 300, the inner chain box 330 can be pulled out from the outer chain box 340, and the inner chain box 330 and the chain 320 can be cleaned outside the outer chain box 340. In some embodiments, when cleaning the chain assembly 300, it is not necessary to pull the inner chain box 330 out from the outer chain box 340; the inner chain box 330 and the chain 320 contained in the outer chain box 340 can be cleaned directly, and the liquid used to rinse the chain assembly 300 can flow out from the outer chain box 340 through the inner chain box 330 via the liquid flow structure.

[0062] In some embodiments, when cleaning the chain assembly 300, it can be decided whether to pull the inner chain box 330 out of the outer chain box 340 for cleaning, depending on the actual situation. In some embodiments, when the chain 320 needs to be replaced, the inner chain box 330 and the chain 320 can be pulled out of the outer chain box 340, and then the inner chain box 330 and the chain 320 can be cleaned outside the outer chain box 340; when the chain 320 does not need to be replaced, the inner chain box 330 and the chain 320 contained in the outer chain box 340 can be cleaned directly, and the liquid for rinsing the chain assembly 300 can flow out through the inner chain box 330 and the outer chain box 340 through the liquid flow structure, thereby saving time and improving operating efficiency.

[0063] In some embodiments, the position of the opening 335 and the position of the track 334 are adapted for liquid outflow. For example... Figure 11 As shown, the opening 335 can be positioned to correspond to a section of track 334, allowing the liquid used to rinse that section of track 334 to flow out from the opening 335. Specifically, when the inner chain box 330 is pulled out of the outer chain box 340, the liquid used to rinse the inner chain box 330 and chain 320 can flow out of the inner chain box 330 through the opening 335; when both the inner chain box 330 and chain 320 are located in the outer chain box 340, the liquid used to rinse the chain 320 and inner chain box 330 can flow from the inner chain box 330 to the outer chain box 340 through the opening 335. In some embodiments, such as... Figure 11 As shown, opening 335 can be set to multiple.

[0064] In some embodiments, the inner chain box 330 may further include an outer panel 332 and an inner panel 331. For example... Figure 12 As shown, the outer plate 332 and the inner plate 331 can be fixed together by bolts and nuts 336. Furthermore, the outer plate 332 and the inner plate 331 can be fixed together by multiple sets of bolts and nuts 336. In some embodiments, the inner chain box 330 may also include a spacer 337, which is disposed on the bolt for fastening the bolt and supporting the chain 320.

[0065] like Figure 9 and Figure 13As shown, in some embodiments, the liquid flow structure includes a drain component 341 disposed in the outer chain box 340, so that liquid flowing into the outer chain box 340 flows out of the outer chain box 340 through the drain component. In some embodiments, when cleaning the chain assembly 300, it is not necessary to pull the inner chain box 330 and the chain 320 out of the outer chain box 340. The inner chain box 330 and the chain 320 inside the outer chain box 340 can be directly rinsed. The liquid rinsing the chain assembly 300 can flow through the opening 335 through the inner chain box 330 to the outer chain box 340, and the liquid flowing into the outer chain box 340 flows out of the outer chain box 340 through the drain component.

[0066] like Figure 6 and Figure 7 As shown, in some embodiments, the pushing assembly 600 includes a pushing connection portion 610 and a pushing portion 620. The pushing connection portion 610 is disposed within the pushing hopper 400 and is connected to the chain 320 of the chain assembly 300. The chain 320 is used to drive the pushing connection portion 610 to move within the pushing hopper 400 and the rotating hopper. The pushing portion 620 is detachably connected to the pushing connection portion 610 and is configured to push the pushing portion 620 to move. The pushing portion 620 is used to push the spent fuel assembly. In this embodiment, pushing the spent fuel assembly through the pushing portion 620 facilitates applying a pushing force to the spent fuel assembly, causing it to move.

[0067] In some embodiments, such as Figure 14 As shown, the end of the push connection part 610 away from the chain 320 is provided with a connecting protrusion 611, such as... Figure 15 As shown, the pusher 620 is provided with a connecting groove 621, and the connecting protrusion 611 cooperates with the connecting groove 621 so that the pusher connecting part 610 and the pusher 620 can be detachably connected, thereby realizing quick assembly and disassembly of the pusher connecting part 610 and the pusher 620, and facilitating the replacement of the pusher 620.

[0068] In some operating conditions, such as when the shearing device malfunctions, it is necessary to remove the spent fuel assembly fed into the shearing device. In this case, the pusher 620 can be replaced with a gripper to hold the spent fuel assembly, facilitating its return to the rotary hopper. In this embodiment, the pusher 620 is easily replaced through the quick assembly and disassembly of the pusher connection 610 and the pusher 620.

[0069] In some embodiments, the push connection 610 includes a push body 612 and a connecting protrusion 611, with the connecting protrusion 611 disposed at the bottom of the push body 612. Simultaneously, a connecting groove 621 is disposed at the bottom of the push part 620, and the connecting protrusion 611 matches the connecting groove 621, with the connecting protrusion 611 being accommodated within the connecting groove 621, thereby enabling the push connection 610 and the push part 620 to be detachably connected. Furthermore, when the push part 620 needs to be replaced, it is not necessary to disassemble the push connection 610; simply lifting the push part 620 upwards allows for the detachment of the push connection 610 from the push part 620.

[0070] like Figure 14 and Figure 15 As shown, in some embodiments, the push connection portion 610 is provided with rollers 613, and multiple rollers 613 are symmetrically arranged on both sides of the push connection portion 610, thereby reducing friction during the movement of the push connection portion 610 and making its movement smoother. In some embodiments, the push portion 620 is also provided with rollers 622, and multiple rollers 622 are symmetrically arranged on both sides of the push portion 620. The rotation axis of the rollers in the push assembly 600 is the same as that of the rollers 3232 of the chain 320.

[0071] like Figure 15 As shown, in some embodiments, the pushing part 620 includes a moving part 623, a connecting rod 624, and a pusher head 625. The moving part 623 is detachably connected to the pushing connection part 610. A roller 622 is disposed on the moving part 623 to reduce friction between the pushing part 620 and the pushing hopper 400 or the rotating hopper. The connecting rod 624 connects the moving part 623 and the pusher head 625 to fix the pusher head 625 to the end of the moving part 623 away from the pushing connection part 610. The pusher head 625 is used to push the spent fuel assembly. In some embodiments, the pusher head 625 is shaped to match the spent fuel assembly to uniformly transmit the pushing force to the spent fuel assembly, facilitating the movement of the spent fuel assembly in the rotating hopper.

[0072] like Figure 1 As shown, in some embodiments, the top of the push hopper 400 has an opening, and a cover 410 is connected to the opening of the push hopper 400 to seal the opening. The cover 410 is provided with a lifting member 411, which is used to connect to external lifting equipment for lifting and remote assembly / disassembly of the cover 410. For example, the lifting member 411 can be a T-shaped member. In some embodiments, the cover 410 is fixed to the push hopper 400 by a locking assembly 900.

[0073] like Figure 1As shown, in some embodiments, the push hopper 400 is disposed on the outer chain box 340, and the bottom of the push hopper 400 is provided with a connection port for connecting the push hopper 400 and the inner chain box 330, so that the chain 320 can move into the push hopper 400 through the connection port, so that the chain 320 can be connected to the push component 600. The end of the chain 320 that connects to the push component 600 is disposed inside the push hopper 400, so that the chain 320 and the push component 600 remain connected.

[0074] like Figure 1 and Figure 13 As shown, in some embodiments, the pushing device includes two spaced-apart push hopper support seats 710, with an outer chain box 340 disposed between the two push hopper support seats 710. A push hopper 400 is disposed on the push hopper support seat 710, which supports the push hopper 400 so that the push hopper 400 is positioned on the outer chain box 340. In some embodiments, the outer chain box 340 may be fixed between the two push hopper support seats 710 for easy removal of the outer chain box 340.

[0075] In some embodiments, by placing the pusher bin 400 on the outer chain box 340, the top opening of the outer chain box 340 can be sealed, thereby sealing the inner chain box 330 within the space formed by the outer chain box 340, preventing external dust from entering the inner chain box 330 and causing problems such as chain jamming in the inner chain box 330, thus affecting the operation of the chain assembly 300.

[0076] like Figure 7 As shown, in some embodiments, the pushing device further includes a limit detection element 420, which is disposed within the pushing hopper 400 and is used to detect whether the pushing component 600 has retracted into position. Figure 14 As shown, a limit detection trigger part 614 is provided on the push component 600, and the limit detection member 420 is configured to generate a positioning signal when it contacts the limit detection trigger part 614. Specifically, the limit detection trigger part 614 can be provided on the push connection part 610, and the limit detection trigger part 614 can be a trigger bump protruding from the surface of the push connection part 610.

[0077] In some embodiments, after the spent fuel assembly is fully pushed into the shearing device, the chain 320 and the pushing assembly 600 return to their initial positions, and the limit detection element 420 is used to detect whether the pushing assembly 600 has returned to its position. In some embodiments, the limit detection element 420 can be a pneumatic sensor. When the limit detection trigger 614 on the pushing assembly 600 collides with the pneumatic sensor in the pushing hopper 400, the pressure in the air path of the pneumatic sensor changes, thereby triggering the limit detection element 420 to generate a positioning signal.

[0078] like Figure 7 As shown, in some embodiments, a limiting member 430 is provided within the push hopper 400. The limiting member 430 cooperates with the push assembly 600 to limit the backward movement of the chain 320. In some embodiments, the limiting member 430 matches the push connection 610 to limit the push assembly 600 from continuing to move toward the sprocket 310, thereby limiting the extreme position of the chain 320's backward movement and preventing the chain 320 from completely retracting into the inner chain box 330. Simultaneously, the limiting member 430 can also provide a standard zero point for the stroke calibration of the power assembly 100, facilitating the calibration of the power assembly 100's stroke.

[0079] In some embodiments, the limiting member 430 can be a limiting block, which can cooperate with the pushing body 612 of the pushing connection 610 to limit the extreme position of the pushing component 600's retraction. Figure 7 As shown, the pushing body 612 is supported above the connecting protrusion 611, and the limiting member 430 is located below the pushing body 612. When the pushing component 600 retracts to the extreme position, the connecting protrusion 611 contacts the limiting member 430. The limiting member 430 prevents the connecting protrusion 611 from retracting, thereby limiting the chain 320 from continuing to retract.

[0080] like Figure 1 and Figure 16 As shown, in some embodiments, the pushing device further includes a coupling 500, which is connected between the sprocket 310 of the chain assembly 300 and the drive shaft 200, and is used to compensate for radial and axial errors between the sprocket 310 and the drive shaft 200.

[0081] like Figure 17 As shown, in some embodiments, the coupling 500 includes a coupling body 510 and a drive assembly. One end of the drive shaft 200, away from the power assembly 100, is detachably connected to one end of the coupling body 510, and a sprocket shaft 311 is connected to the other end of the coupling body 510. The drive assembly is connected to the coupling body 510 and is used to drive the coupling body 510 to move axially along the drive shaft 200, such that the drive shaft 200 is engaged with or disengaged from the coupling body 510.

[0082] In this embodiment, a drive assembly is used to drive the coupling body 510 to move axially along the drive shaft 200, allowing the drive shaft 200 to quickly disengage from the coupling body 510. This enables rapid disassembly of the drive shaft 200 and the coupling 500, facilitating the removal of the drive shaft 200 or the chain assembly 300. Furthermore, the drive shaft 200 can be inserted into the coupling body 510, enabling rapid installation between the drive shaft 200 and the coupling 500. This embodiment, by providing the coupling 500, allows for rapid connection and disconnection between the drive shaft 200 and the sprocket shaft 311.

[0083] like Figure 17 and Figure 18 As shown, in some embodiments, the drive assembly includes a support member 521, a swing member 522, a connecting shaft 523, and a sliding member 524. The support member 521 is fixed to the push hopper 400; for example, the support member 521 can be fixed to the side of the push hopper 400. The support member 521 is provided with a first limiting hole 525 and a second limiting hole 526. One end of the swing member 522 is inserted into the first limiting hole 525 or the second limiting hole 526, and the other end of the swing member 522 is connected to the connecting shaft 523. The connecting shaft 523 is rotatably mounted on the support member 521 and is perpendicular to the drive shaft 200. One end of the sliding member 524 is connected to the connecting shaft 523, and the other end of the sliding member 524 is slidably connected to the coupling body 510.

[0084] Among them, such as Figure 19 As shown, when the swing member 522 is positioned in the first limiting hole 525, the coupling body 510 is connected to the drive shaft 200; as Figure 20 As shown, when the swing member 522 is positioned in the second limiting hole 526, the drive shaft 200 disengages from the coupling body 510, allowing for the disassembly of the drive shaft 200. When the swing member 522 swings between the first limiting hole 525 and the second limiting hole 526, it drives the connecting shaft 523 and the sliding member 524 to rotate around the axis of the connecting shaft 523. When the sliding member 524 rotates, it drives the coupling body 510 to move axially along the drive shaft 200, thereby achieving the connection and disconnection between the drive shaft 200 and the coupling body 510.

[0085] Furthermore, a limiting block 527 is provided on the support member 521. The limiting block 527 is used to restrict the swinging member 522 from swinging between the first limiting hole 525 and the second limiting hole 526, so as to prevent the swinging member 522 from swinging excessively and causing excessive movement of the coupling body 510, which would affect the transmission shaft 200 or the sprocket shaft 311. Specifically, two limiting blocks 527 are provided on the support member 521 to limit the swing angle of the swinging member 522 so that the swinging member 522 swings between the first limiting hole 525 and the second limiting block hole 526.

[0086] In some embodiments, the swing member 522 can be remotely controlled to swing between the first limiting hole 525 and the second limiting hole 526, thereby enabling quick installation and disassembly between the coupling 500 and the drive shaft 200. Specifically, as shown... Figure 17 As shown, the swing member 522 is provided with an operating part 5221 at the end away from the connecting shaft 523. The operating part 5221 facilitates remote operation by the robot arm, thereby realizing quick assembly and disassembly between the transmission shaft 200 and the sprocket 310.

[0087] When the coupling 500 is in operation, the swing member 522 is inserted into the first limiting hole 525, thereby restricting the position of the coupling body 510 and preventing the coupling body 510 from moving and disconnecting from the drive shaft 200 during the operation of the pushing device. When disassembly is required, the manipulator can be operated to move the operating part 5221 upward to pull the swing member 522 out of the first positioning hole, releasing the limiting of the coupling 500. Then, the manipulator can push the swing member 522 to move it to the second limiting hole 526, thereby causing the coupling body 510 to move axially along the drive shaft 200 to disconnect the connection between the drive shaft 200 and the coupling body 510. Conversely, moving the swing member 522 and inserting it into the second positioning hole enables a quick connection between the coupling 500 and the drive shaft 200.

[0088] In some embodiments, a connecting cylinder is provided on the support member 521, and a connecting shaft 523 is rotatably disposed within the connecting cylinder, thereby enabling the connecting shaft 523 to rotate relative to the support member 521. A bearing is provided between the connecting shaft 523 and the connecting cylinder to support the rotation of the connecting shaft 523 within the connecting cylinder.

[0089] like Figure 17 As shown, in some embodiments, the coupling body 510 is cylindrical, with an internal space for accommodating the drive shaft 200 and the sprocket shaft 311. The drive shaft 200 is inserted into the coupling body 510 from one end, and the sprocket shaft 311 is inserted into the coupling body 510 from the other end, thereby realizing the transmission connection between the drive shaft 200 and the sprocket shaft 311.

[0090] Furthermore, the inner surface of the coupling body 510 is provided with a toothed portion 512, in which multiple teeth are arranged circumferentially along the coupling body 510, and each tooth extends along the direction of rotation of the coupling body 510. Both ends of the coupling body 510 are provided with toothed portions 512, and the ends of the drive shaft 200 and the sprocket shaft 311 are provided with toothed mating portions that mesh with the toothed portions 512. Through the meshing of the toothed portions 512 and the toothed mating portions, the connection and transmission between the coupling body 510 and the drive shaft 200 and the sprocket shaft 311 are realized. For example, the coupling body is a drum-shaped toothed sleeve.

[0091] When the coupling body 510 moves axially along the drive shaft 200, the drive shaft 200 can be inserted into the coupling body 510 and mesh with the toothed portion 512, thereby driving the coupling body 510 to rotate. Simultaneously, the sprocket shaft 311 is connected to the coupling body 510 and meshes with the toothed portion 512 at the other end of the coupling body 510, so that when the coupling body 510 rotates, it drives the sprocket shaft 311 to rotate, thus achieving power transmission.

[0092] like Figure 17 As shown, in some embodiments, a sliding groove 511 is provided on the coupling body 510, and the sliding groove 511 is arranged along the circumferential direction of the coupling body 510. A sliding member 524 is slidably connected in the sliding groove 511, and the sliding member 524 surrounds a portion of the coupling body 510. Specifically, when the swing member 522 swings between the first limiting hole 525 and the second limiting hole 526 and drives the sliding member 524 to rotate, the sliding member 524 slides in the sliding groove 511 to counteract the movement of the sliding member 524 in the radial direction of the transmission shaft 200, thereby driving the coupling body 510 to move axially along the transmission shaft 200; when the transmission shaft 200 drives the coupling body 510 and the sprocket shaft 311 to rotate, the sliding member 524 slides in the sliding groove 511 to make the coupling body 510 rotate relative to the sliding member 524.

[0093] In some embodiments, the swing member 522 is perpendicular to the connecting shaft 523, and the connecting shaft 523 is perpendicular to the transmission shaft 200. Specifically, the connecting shaft 523 can be vertically arranged. When one end of the swing member 522 moves between the first limiting hole 525 and the second limiting hole 526, it makes a circular motion with the axis of the connecting shaft 523 as the center, and at the same time drives the connecting shaft 523 to rotate. When the connecting shaft 523 rotates, it drives the sliding member 524 connected to it to make a circular motion with the axis of the connecting shaft 523 as the center, so that the end of the sliding member 524 slides in the sliding groove 511 and moves along the axial direction of the transmission shaft 200, thereby driving the coupling body 510 to move along the axial direction of the transmission shaft 200. This prevents the sliding member 524 from driving the coupling body 510 to move radially, which would cause the coupling body 510 to jam and be unable to move.

[0094] For example, the slider 524 is a fork structure, which includes a connecting rod and a C-shaped member. The connecting rod connects the connecting shaft 523 and the C-shaped member. The C-shaped member surrounds the coupling body 510, and its end is disposed within the sliding groove 511, allowing it to slide within the sliding groove 511. Furthermore, there is a gap between the end of the C-shaped member and the surface of the sliding groove 511, thereby enabling the C-shaped member to slide smoothly within the sliding groove 511.

[0095] In this embodiment, the drive shaft 200 drives the coupling body and the sprocket shaft 311 to rotate, thereby driving the sprocket body 312 to rotate, which in turn drives the chain 320 and the pushing assembly 600 to move within the pushing bin 400 and the rotating bin, so as to push the spent fuel assembly in the rotating bin into the shearing device.

[0096] like Figure 1 As shown, in some embodiments, the pushing device further includes an air intake component 440, which is disposed in the pushing hopper 400. The air intake component 440 is used to introduce air into the pushing hopper 400, so that the airflow is blown from the pushing hopper 400 through the rotating hopper to the shearing device, thereby preventing dust generated in the shearing device during the shearing process from entering the receiving device.

[0097] like Figure 21 and Figure 22 As shown, in some embodiments, the air intake assembly 440 includes an air intake pipe 441 and a liquid seal structure 442. The air intake pipe 441 is connected to the pusher hopper 400 and is used to intake air into the pusher hopper 400. The liquid seal structure 442 is disposed outside the air intake pipe 441 and stores a sealing liquid inside the liquid seal structure 442 to seal the air intake pipe 441 and the pusher hopper 400, so that the gas in the air intake pipe 441 can only flow into the pusher hopper 400.

[0098] In some embodiments, the liquid seal structure 442 includes an outer sleeve 4421 and an inner sleeve 4422. The inner sleeve 4422 is connected to and communicates with the pusher hopper 400. The outer sleeve 4421 is sleeved outside the inner sleeve 4422, with the bottom of the outer sleeve 4421 closed and the bottom of the inner sleeve 4422 having an opening, thereby allowing the outer sleeve 4421 and the inner sleeve 4422 to communicate through the bottom opening. An air inlet pipe 441 is fixed in the inner sleeve 4422, with an outlet at the top of the air inlet pipe 441 located within the inner sleeve 4422 and an inlet at the bottom of the air inlet pipe 441 located outside the outer sleeve 4421.

[0099] The sealing liquid is stored in the outer sleeve 4421 and the inner sleeve 4422, and the liquid level of the sealing liquid does not exceed the outlet of the air inlet pipe 441, so that the gas entering through the air inlet pipe 441 can only enter the push hopper 400 through its top opening and the top of the inner sleeve 4422. In some embodiments, the sealing liquid is deionized water to avoid corrosion of the liquid seal structure 442.

[0100] In some embodiments, the liquid seal structure 442 further includes an inlet pipe 4423 disposed within the outer sleeve 4421, and the inlet pipe 4423 is used to deliver sealing liquid into the liquid seal structure 442. In some embodiments, the liquid seal structure 442 further includes an overflow pipe 4424 disposed within the outer sleeve 4421, and the overflow pipe 4424 is located below the outlet of the air inlet pipe 441, ensuring that an appropriate amount of sealing liquid is stored in the liquid seal device, while preventing the liquid level of the sealing liquid from exceeding the outlet of the air inlet pipe 441 and blocking the air inlet pipe 441.

[0101] like Figure 1 As shown, in some embodiments, the pushing device further includes an inflatable sealing assembly 800, which is disposed at the end where the pushing hopper 400 connects to the rotating hopper, for sealing the connection between the pushing hopper 400 and the rotating hopper. Specifically, when the rotating hopper and the pushing hopper 400 are in communication, the inflatable sealing assembly 800 inflates to seal the connection between them; when the rotating hopper rotates, the inflatable sealing assembly 800 deflates to provide space for the rotation of the rotating hopper.

[0102] like Figure 23 As shown, the inflatable sealing assembly 800 includes a sealing mounting portion 810 and an inflatable pad 820. The sealing mounting portion 810 is mounted at the end of the push hopper 400, and the inflatable pad 820 is mounted on the sealing mounting portion 810, with the inflatable pad 820 located on the side away from the push hopper 400, so as to seal the rotating hopper and the push hopper 400 when they are docked. Both the sealing mounting portion 810 and the inflatable pad 820 are annular and match the push hopper 400. The inflatable pad 820 forms a channel 821, which matches the spent fuel assembly, so that when the rotating hopper and the push hopper 400 are docked, the rotating hopper can communicate with the push hopper 400, allowing the push assembly 600 to enter the rotating hopper through the channel 821 to push the spent fuel assembly inside the rotating hopper.

[0103] In some embodiments, the sealing mounting part 810 is provided with an inflation port 830, which is connected to the inflation pad 820 for inflating and deflating the inflation pad 820. When the rotating hopper docks with the pushing hopper 400, the inflation pad 820 is inflated through the inflation port 830 to fill the gap between the rotating hopper and the pushing hopper 400, ensuring the channel between the rotating hopper and the pushing hopper 400 is sealed and preventing dust leakage. When the rotating hopper starts to rotate, the inflation pad 820 deflates and retracts, thereby providing space for the rotation of the rotating hopper.

[0104] like Figure 24As shown, a connecting flange 450 is provided at the end of the push hopper 400. The connecting flange 450 is provided with an installation groove. The inflatable sealing assembly 800 is installed in the installation groove, thereby realizing the installation and fixation of the inflatable sealing assembly 800.

[0105] like Figure 1 As shown, in some embodiments, the pushing device is provided with a locking component 900, which is used to fix the inflatable sealing component 800 to the end of the pushing hopper 400. In some embodiments, the locking component 900 can be remotely controlled to lock and unlock. When the locking component 900 is locked, the inflatable sealing component 800 is fixed to the pushing hopper 400; when the locking component 900 is unlocked, the inflatable sealing component 800 can be detached from the pushing hopper 400, realizing remote assembly and disassembly of the inflatable sealing component 800.

[0106] like Figure 24 As shown, the connecting flange 450 at the end of the push hopper 400 has an end plate 451, which is disposed on the top of the push hopper 400 and can be located on the side of the connecting flange 450 facing the push hopper 400. The inflatable sealing assembly 800 is provided with a top plate 811, which extends from the top surface of the inflatable sealing assembly 800 towards the side facing the push hopper 400. The locking assembly 900 is fixed to the top plate 811 of the inflatable sealing assembly 800, and the locking assembly 900 can lock the top plate 811 of the inflatable sealing assembly 800 and the end plate 451 of the push hopper 400, thereby fixing the inflatable sealing assembly 800 to the push hopper 400.

[0107] like Figure 25 and 26 As shown, in some embodiments, the locking assembly 900 includes a stationary portion 910, which is fixedly connected to the inflatable sealing assembly 800. During the locking operation of the locking assembly 900 on the inflatable sealing assembly 800, the stationary portion 910 remains stationary.

[0108] Furthermore, the locking assembly 900 includes a moving part 920, which is configured to move relative to the stationary part 910 during the locking operation of the locking assembly on the inflatable sealing assembly 800. A locking area is formed between the stationary part 910 and the moving part 920. During the relative movement between the moving part 920 and the stationary part 910, the space of the locking area changes. When the space of the locking area decreases, the top plate 811 of the inflatable sealing assembly 800 is locked in the locking area; when the space of the locking area increases, the top plate 811 of the inflatable sealing assembly 800 is unlocked in the locking area.

[0109] The stationary part 910 can be a square sleeve-shaped object capable of securely locking the inflatable sealing assembly 800. The stationary part 910 is fixedly connected to the inflatable sealing assembly 800; for example, the stationary part 910 can be fixedly connected to the top plate 811 of the inflatable sealing assembly 800. The moving part 920 can be an arc-shaped structure, including an extension 921 extending along the direction of movement of the moving part 920 and protrusions 922 formed at both ends of the extension 921, wherein the lower protrusion 922 extends in a direction perpendicular to the extension 921. A locking area is formed between the lower end of the square sleeve and the lower protrusion 922 of the arc-shaped structure, and the space of the locking area changes during the relative movement of the square sleeve and the arc-shaped structure.

[0110] In some embodiments, the locking assembly 900 includes a locking power unit 930, which is fixedly connected to the moving part 920 and threadedly connected to the stationary part 910. The locking power unit 930 is configured such that when it is driven to rotate by an external force, it rotates relative to the stationary part 910, thereby driving the moving part 920 to move. When the locking power unit 930 rotates, the moving part 920 and the stationary part 910 do not rotate.

[0111] In some embodiments, the stationary portion 910 is provided with an annular groove 911, and a pin 912 is provided within the annular groove 911. The annular groove 911 and the pin 912 restrict the movement of the locking power unit 930 in a predetermined direction. That is, the annular groove 911 and the pin 912 ensure that the locking power unit 930 can only drive the moving part 920 to move along the direction of its rotation axis, so that the moving part 920 moves closer to or away from the stationary portion 910 to achieve locking or disengagement of the inflatable sealing assembly 800.

[0112] The locking power unit 930 includes a screw 931 and a transition structure 932. The transition structure 932 can be a square nut. The transition structure 932 is fixedly connected to the moving part 920. The engagement between the screw 931 and the transition structure 932 is configured such that when the screw 931 rotates, the transition structure 932 does not rotate, but moves along the axial direction of the screw 931 along with the displacement of the screw 931. A robotic arm can be connected to the locking power unit, thereby enabling remote operation of the robotic arm to lock or release the locked component.

[0113] The locking component 900 of this application can remotely and stably lock or unlock the inflatable sealing component 800, thereby improving the convenience of operation.

[0114] like Figure 1As shown, in some embodiments, the pushing device further includes a receiving transition chamber 1010, which is disposed parallel to one side of the pushing hopper 400. The receiving transition chamber 1010 is used to connect with the rotating hopper to receive spent fuel assemblies into the rotating hopper. The rotating hopper downstream of the pushing device is rotatable to dock with the receiving transition chamber 1010 or the pushing hopper 400. When the rotating hopper docks with the receiving transition chamber 1010, the spent fuel assemblies pushed by the upstream feeding equipment enter the rotating hopper via the receiving transition chamber 1010; when the rotating hopper rotates to dock with the pushing hopper 400, the pushing component 600 in the pushing hopper 400 pushes the spent fuel assemblies to move within the rotating hopper, so that the spent fuel assemblies enter the shearing device for shearing.

[0115] like Figure 1 As shown, the top of the receiving transition chamber 1010 has an opening, and a cover 1011 is connected to the opening to seal it. The cover 1011 is provided with a lifting member 1012, which is used to connect to external lifting equipment for lifting and remote assembly / disassembly of the cover 1011. For example, the lifting member 1012 can be a T-shaped piece. In some embodiments, the cover 1011 is fixed to the receiving transition chamber 1010 by a locking assembly 900.

[0116] In some embodiments, the receiving transition chamber 1010, the pushing chamber 400, and the rotating hopper are disposed within the feeding hot chamber, while the upstream feeding equipment is disposed outside the feeding hot chamber. To enable the pushing of spent fuel assemblies from the feeding equipment to the rotating hopper, the receiving transition chamber 1010 is installed through the wall of the feeding hot chamber.

[0117] like Figure 1 As shown, an embedded part 1013 is provided outside the receiving transition chamber 1010. The embedded part 1013 is installed in the wall, and the receiving transition chamber 1010 passes through the embedded part 1013. The embedded part 1013 is used to fix the receiving transition chamber 1010 to avoid vibration and impact and ensure the stability of the receiving transition chamber 1010. In some embodiments, the embedded part 1013 is provided with anchor bolts, which are used to fix the embedded part 1013 and the wall.

[0118] like Figure 1 and Figure 13 As shown, in some embodiments, the pushing device further includes a receiving transition chamber support 720, on which the receiving transition chamber 1010 is supported. The receiving transition chamber support 720 is arranged parallel to the outer chain box 340.

[0119] Regarding the embodiments of the present invention, it should also be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0120] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A spent fuel assembly pushing device for pushing the spent fuel assembly to a shearing device, characterized in that, include: Power components; A drive shaft, one end of which is connected to the power assembly, the power assembly being used to drive the drive shaft to rotate; A chain assembly, wherein the chain assembly is connected to the other end of the drive shaft, and the drive shaft is used to drive the chain assembly to reciprocate; A push hopper, which is used to connect to an external rotary hopper, which is used to contain the spent fuel assembly; A pushing component is disposed within the pushing hopper and connected to the chain assembly. The chain assembly is used to drive the pushing component to move within the pushing hopper and the rotating hopper, thereby pushing the spent fuel assembly in the rotating hopper to the shearing device. The chain assembly includes: A sprocket is disposed inside the pusher hopper and is connected to the drive shaft, which drives the sprocket to rotate. A chain, which is connected to the pushing component, and which cooperates with the sprocket so that the rotation of the sprocket can drive the chain to move; An inner chain box, in which the chain is disposed, the inner chain box is provided with a track, the chain is disposed on the track, and the chain can move along the track; The chain includes: Multiple first chain plates, which cooperate with each other; multiple second chain plates, which cooperate with each other; multiple pins, which fix the first chain plates and the second chain plates together. The mating joints of the plurality of first chain plates and the mating joints of the plurality of second chain plates are staggered. The distance between the staggered mating joints of the first chain plates and the second chain plates is less than the length of the straight section of the track, and the distance between the staggered mating joints of the first chain plates and the second chain plates is less than the radius of the curved section of the track. When the chain moves, the distance between the interlocking joints of the first and second chain plates is defined as one unit of movement.

2. The apparatus according to claim 1, characterized in that, The sprocket is provided with multiple receiving grooves, which are evenly distributed along the circumference of the sprocket. The pin engages with the receiving grooves so that the rotation of the sprocket can drive the pin to move, thereby driving the chain to move.

3. The apparatus according to claim 1, characterized in that, The chain assembly also includes: An outer link box is configured to accommodate the inner link box, and a gap is provided between the inner link box and the outer link box so that the inner link box can be directly detached through the gap between it and the outer link box. The inner chain box and the outer chain box are respectively provided with liquid flow structures so that the liquid used to rinse the chain assembly can flow out from the outer chain box through the inner chain box.

4. The apparatus according to claim 1, characterized in that, The push component includes: A push connection part is connected to the chain of the chain assembly, and the chain is used to drive the push connection part to move within the push hopper and the rotating hopper; A propulsion unit is detachably connected to the push connection unit, the push connection unit being configured to push the propulsion unit to move, the propulsion unit being used to propel the spent fuel assembly.

5. The apparatus according to claim 4, characterized in that, The push connection part has a connecting protrusion at the end away from the chain, and the push part has a connecting groove. The connecting protrusion and the connecting groove cooperate to make the push connection part and the push part detachably connected.

6. The apparatus according to claim 3, characterized in that, The push hopper is disposed on the outer chain box, and the push hopper is provided with a connection port. The connection port is used to connect the push hopper and the inner chain box so that the chain can move into the push hopper through the connection port. The chain is located at one end that is connected to the pushing component, within the pushing hopper, so as to be connected to the pushing component.

7. The apparatus according to claim 1, characterized in that, Also includes: A limit detection component is provided inside the push hopper, and the limit detection component is used to detect whether the push component has retreated to the correct position; The push component is provided with a limit detection trigger, and the limit detection component is configured to generate a positioning signal when it comes into contact with the limit detection trigger.

8. The apparatus according to claim 1, characterized in that, The push hopper is equipped with a limiting component, which cooperates with the push assembly to limit the backward movement of the chain in the chain assembly.

9. The apparatus according to claim 1, characterized in that, Also includes: An air intake assembly is disposed in the push hopper and is used to introduce air into the push hopper.

10. The apparatus according to claim 9, characterized in that, The air intake assembly includes: An air inlet pipe is connected to the pusher hopper and is used to introduce air into the pusher hopper. A liquid seal structure is disposed outside the air inlet pipe, and the liquid seal structure stores a sealing liquid for sealing the air inlet pipe and the pusher hopper.

11. The apparatus according to claim 1, characterized in that, Also includes: A coupling, which connects the sprocket of the chain assembly to the drive shaft, is used to compensate for radial and axial errors between the sprocket and the drive shaft.

12. The apparatus according to claim 11, characterized in that, The coupling includes: The coupling body has one end of the drive shaft detachably connected to one end of the coupling body away from the power component, and the sprocket is connected to the other end of the coupling body. A drive assembly, connected to the coupling body, is used to drive the coupling body to move axially along the transmission shaft, so that the transmission shaft is connected to or disconnected from the coupling body.

13. The apparatus according to claim 12, characterized in that, The driving component includes: A support member is fixed to the pusher hopper, and the support member is provided with a first limiting hole and a second limiting hole; A swinging member, one end of which is inserted into the first limiting hole or the second limiting hole; A connecting shaft is rotatably mounted on the support member, the connecting shaft is perpendicular to the transmission shaft, and the other end of the swing member is connected to the connecting shaft; A sliding member, one end of which is connected to the connecting shaft, and the other end of which is slidably connected to the coupling body; When the swinging member is positioned at the first limiting hole, the coupling body is connected to the drive shaft; when the swinging member is positioned at the second limiting hole, the drive shaft is disengaged from the coupling body. When the swinging member swings between the first limiting hole and the second limiting hole, it drives the connecting shaft and the sliding member to rotate around the axis of the connecting shaft. When the sliding member rotates, it drives the coupling body to move axially along the transmission shaft.

14. The apparatus according to claim 13, characterized in that, The coupling body is provided with a sliding groove, which is arranged along the circumferential direction of the coupling body. The sliding member is slidably connected within the sliding groove, and the sliding member surrounds a portion of the coupling body; When the swinging member swings between the first limiting hole and the second limiting hole and drives the sliding member to rotate, the sliding member slides in the sliding groove to drive the coupling body to move axially along the transmission shaft. When the drive shaft drives the coupling body and sprocket to rotate, the sliding member slides in the sliding groove so that the coupling body rotates relative to the sliding member.

15. The apparatus according to claim 1, characterized in that, The power assembly is located outside the radioactive environment where the chain assembly, the pushing assembly, and the pushing hopper are situated; the drive shaft includes: A solid shaft, which is connected to the power assembly; A hollow shaft, which connects the solid shaft to the chain assembly; The solid shaft is rotatably fitted within the fixing part, which is configured to penetrate the outer wall. The fixing part is used to install the solid shaft in the outer wall, which is used to isolate the power assembly from the radioactive environment.

16. The apparatus according to claim 15, characterized in that, The fixing part includes: A first fixing part is disposed within the outer wall; The second fixing part is detachably fixed inside the first fixing part and is sleeved on the outside of the solid shaft; A support portion is disposed between the second fixing portion and the solid shaft, and the support portion is configured to rotatably support the solid shaft within the second fixing portion.

17. The apparatus according to claim 1, characterized in that, Also includes: An inflatable sealing assembly is disposed at one end where the push hopper connects to the rotating hopper; When the rotating hopper is connected to the pushing hopper, the inflatable sealing assembly is inflated to seal the connection between the rotating hopper and the pushing hopper. When the rotating hopper rotates, the air-sealing assembly deflates to provide space for the rotation of the rotating hopper.

18. The apparatus according to claim 1, characterized in that, Also includes: A receiving transition bin is disposed parallel to one side of the pushing bin and is used to connect with the rotating bin to receive the spent fuel assembly into the rotating bin.

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