Spent fuel assembly receiving feed system

Abstract

Embodiments of the present application relate to the technical field of spent fuel reprocessing, and specifically disclose a spent fuel assembly receiving and feeding system for receiving a spent fuel assembly and pushing the spent fuel assembly to a shearing device. The receiving and feeding system comprises a rotary magazine for accommodating the spent fuel assembly, the rotary magazine being arranged to have a receiving station and a feeding station; a rotary switching device, the rotary magazine being arranged on the rotary switching device, the rotary switching device being used to support and drive the rotary magazine to rotate so as to switch between the receiving station and the feeding station; a pushing magazine, the rotary magazine being selectively and sealingly connected with the pushing magazine; and a pushing device, part of which being arranged in the pushing magazine. When the rotary magazine rotates to the receiving station, the rotary magazine is used to receive the spent fuel assembly; when the rotary magazine rotates to the feeding station, the rotary magazine is sealingly connected with the pushing magazine, and the pushing device is used to drive the spent fuel assembly in the rotary magazine to move so as to push the spent fuel assembly to the shearing device.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of spent fuel reprocessing technology, specifically to a feeding system for spent fuel assemblies. 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 feeding system for spent fuel assemblies, used to receive spent fuel assemblies and push them to a shearing device. The feeding system includes: a rotary hopper for accommodating spent fuel assemblies, the rotary hopper being configured with a receiving station and a feeding station; a rotary switching device, the rotary hopper being disposed within the rotary switching device, the rotary switching device supporting and driving the rotary hopper to rotate, switching between the receiving station and the feeding station; a pushing hopper, the rotary hopper being selectively and sealingly connected to the pushing hopper; and a pushing device, partially disposed within the pushing hopper. Wherein, when the rotary hopper rotates to the receiving station, the rotary hopper receives the spent fuel assemblies; when the rotary hopper rotates to the feeding station, the rotary hopper and the pushing hopper are sealed together, and the pushing device drives the spent fuel assemblies within the rotary hopper to move, pushing the spent fuel assemblies to the shearing device.

[0004] In this embodiment of the invention, the rotary hopper receives spent fuel assemblies conveyed by the upstream feeding equipment. By setting a rotation switching device, the rotary hopper can be rotated in the horizontal direction to turn the spent fuel assemblies fed into the rotary hopper around and change their direction. The spent fuel assemblies in the rotary hopper are rotated from facing forward at the bottom end to facing forward at the top end, so that the spent fuel assemblies are conveyed to the shearing device in the direction of facing forward at the top end, so as to meet the requirement that the spent fuel assemblies need to be sheared in the order of top end, fuel section, and bottom end. 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 a material feeding system according to an embodiment of the present invention.

[0007] Figure 2 yes Figure 1A partial structural diagram of the intermediate feeding system.

[0008] Figure 3 This is a schematic diagram of the structure of a rotary switching device and a rotary hopper according to an embodiment of the present invention.

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

[0010] Figure 5 yes Figure 4 Enlarged view of the power unit.

[0011] Figure 6 This is a schematic diagram of the structure of a transmission shaft according to an embodiment of the present invention.

[0012] Figure 7 This is a cross-sectional view of a drive shaft according to an embodiment of the present invention.

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

[0014] Figure 9 This is a cross-sectional view of a rotating bearing assembly according to an embodiment of the present invention.

[0015] Figure 10 This is a schematic diagram of a rotary switching device according to an embodiment of the present invention.

[0016] Figure 11 This is a schematic diagram of the structure of a coupling according to an embodiment of the present invention.

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

[0018] Figure 13 This is a schematic diagram of a coupling in a connected state according to an embodiment of the present invention.

[0019] Figure 14 This is a schematic diagram of a coupling in an open state according to an embodiment of the present invention.

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

[0021] Figure 16 yes Figure 15 A structural schematic diagram of the rotating silo from another perspective.

[0022] Figure 17 This is a schematic diagram of the installation and assembly of a rotating hopper and a rotating bearing assembly according to an embodiment of the present invention.

[0023] Figure 18 yes Figure 2 Enlarged view of point A in the middle.

[0024] Figure 19 This is a schematic diagram of the structure of a snap-fit ​​assembly according to an embodiment of the present invention.

[0025] Figure 20 This is a schematic diagram of a snap fastener assembly in a pressed state according to an embodiment of the present invention.

[0026] Figure 21 This is a schematic diagram of a snap-fit ​​assembly being pressed against a spent fuel assembly according to an embodiment of the present invention.

[0027] Figure 22 This is a schematic diagram of the structure of a pushing device and a pushing hopper according to an embodiment of the present invention.

[0028] Figure 23 This is a schematic diagram of a pushing device according to an embodiment of the present invention.

[0029] Figure 24 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.

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

[0031] Figure 26 This is a schematic diagram of the structure of a chain according to an embodiment of the present invention.

[0032] Figure 27 This is a schematic diagram of the structure of a chain assembly according to an embodiment of the present invention.

[0033] Figure 28 This is a schematic diagram of the structure of an inner chain box according to an embodiment of the present invention.

[0034] Figure 29 This is a half-sectional view of the inner chain box according to an embodiment of the present invention.

[0035] Figure 30 yes Figure 29 A structural schematic diagram of the inner chain box from another perspective.

[0036] Figure 31 This is a structural schematic diagram of an outer chain box and a receiving support base according to an embodiment of the present invention.

[0037] Figure 32 This is a schematic diagram of the structure of a push connection part according to an embodiment of the present invention.

[0038] Figure 33This is a schematic diagram of the structure of the pusher part according to an embodiment of the present invention.

[0039] Figure 34 This is a schematic diagram of the structure of an air intake assembly according to an embodiment of the present invention.

[0040] Figure 35 yes Figure 34 Cross-sectional view of the middle air intake assembly.

[0041] Figure 36 This is a schematic diagram of the structure of a rotary hopper in the receiving position according to an embodiment of the present invention.

[0042] Figure 37 This is a schematic diagram of the structure of a rotary hopper in the feeding position according to an embodiment of the present invention.

[0043] Figure 38 This is a schematic diagram of the structure of an inflatable sealing assembly according to an embodiment of the present invention.

[0044] Figure 39 This is a schematic diagram of the installation process of an inflatable sealing assembly according to an embodiment of the present invention.

[0045] Figure 40 This is a schematic diagram of the installation of an inflatable sealing assembly and a feeding transition chamber according to an embodiment of the present invention.

[0046] Figure 41 yes Figure 37 A magnified view from another perspective at point B in the middle.

[0047] Figure 42 This is a schematic diagram of the structure of a positioning component according to an embodiment of the present invention.

[0048] Figure 43 This is a schematic diagram of a positioning component in a positioning state according to an embodiment of the present invention.

[0049] Figure 44 This is a schematic diagram of the positioning component in the open state according to an embodiment of the present invention.

[0050] Figure 45 yes Figure 3 Enlarged view of point C in the middle.

[0051] 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

[0052] 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.

[0053] 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.

[0054] The inventors of this invention have discovered that in conventional spent fuel shearing systems, spent fuel assemblies from the loading hot chamber enter the shearing device with the bottom end facing forward for shearing. However, during the shearing process, the spent fuel assemblies need to be sheared sequentially in the order of top end, fuel section, and bottom end. Therefore, embodiments of this invention provide a spent fuel assembly receiving and feeding system for receiving spent fuel assemblies and pushing them to the shearing device.

[0055] like Figure 1As shown, the feeding system in this embodiment includes a rotary hopper 100, a rotary switching device 200, a push hopper 300, and a push device 400. The rotary hopper 100 is used to accommodate spent fuel assemblies and is configured to have a receiving station and a feeding station. The rotary hopper 100 is disposed within the rotary switching device 200, which supports and drives the rotary hopper 100 to rotate, switching between the receiving station and the feeding station. The rotary hopper 100 can be selectively and sealingly connected to the push hopper 300. The push device 400 is partially disposed within the push hopper 300. Specifically, when the rotary hopper 100 rotates to the receiving station, it receives spent fuel assemblies; when it rotates to the feeding station, it is sealed to the push hopper 300, and the push device 400 drives the spent fuel assemblies within the rotary hopper 100 to move, pushing the spent fuel assemblies to the shearing device.

[0056] In this embodiment of the invention, a rotary hopper 100 receives spent fuel assemblies from the upstream feeding hot chamber. By setting a rotation switching device 200, the rotary hopper 100 can rotate horizontally to reverse the orientation of the spent fuel assemblies fed into it, changing their orientation from bottom-facing to top-facing. This allows the spent fuel assemblies to be fed into the shearing device with their top-facing orientation, fulfilling the requirement that the spent fuel assemblies be sheared sequentially in the order of top end, fuel section, and bottom end. Furthermore, a push hopper 300 is provided, which can dock with the rotary hopper 100, thereby sealing the feeding channel of the spent fuel assemblies and preventing dust escape.

[0057] In this embodiment, when the rotary hopper 100 is in the receiving position, it can receive spent fuel assemblies pushed by upstream equipment. After receiving the spent fuel assemblies, the rotary switching device 200 drives the rotary hopper 100 to rotate, switching the rotary hopper 100 to the feeding position and simultaneously reversing the direction of the spent fuel assemblies. When the rotary hopper 100 is in the feeding position, it docks with the push hopper 300, and the push device 400 inside the push hopper 300 can push the spent fuel assemblies in the rotary hopper 100 into the shearing device.

[0058] like Figure 2 and Figure 3As shown, in some embodiments, the rotary switching device 200 includes a power assembly 210, a drive shaft 220, and a rotary bearing assembly 230. One end of the drive shaft 220 is connected to the power assembly 210, which drives the drive shaft 220 to rotate. The rotary bearing assembly 230 is connected to the other end of the drive shaft 220, which drives the rotary bearing assembly 230 to rotate about an axis perpendicular to the drive shaft 220. The rotary hopper 100 is supported by the rotary bearing assembly 230, which supports and drives the rotary hopper 100 to rotate, thereby switching the rotary hopper 100 between a receiving station and a feeding station.

[0059] In this embodiment, the rotating hopper 100 is used to contain spent fuel assemblies, which are radioactive. Therefore, the rotating support assembly 230 and the rotating hopper 100 are located in the feeding hot chamber to shield the radioactive radiation of the spent fuel assemblies, thus providing protection. In some embodiments, the power assembly 210 is located outside the radioactive environment where the rotating support assembly 230 and the rotating hopper 100 are located, for example, outside the feeding hot chamber, thereby preventing the power assembly 210 from being affected by radioactive radiation and thus its normal operation. In this embodiment, the driving force of the power assembly 210 outside the feeding hot chamber is transmitted to the rotating support assembly 230 through the drive shaft 220, thereby realizing the rotation of the rotating support assembly 230.

[0060] like Figure 4 and Figure 5 As shown, in some embodiments, the power assembly 210 includes a driver 211 and a reducer 212. The driver 211 provides power to the drive shaft 220, and the reducer 212 is connected between the driver 211 and the drive shaft 220. The reducer 212 transmits the power from the driver 211 to the drive shaft 220 while reducing the rotational speed so that the rotational speed of the drive shaft 220 meets the requirements. In some embodiments, the driver 211 can be a motor, such as a servo motor.

[0061] Furthermore, a coupling 213 is connected between the driver 211 and the reducer 212. The coupling 213 can compensate for the misalignment between the output shaft of the driver 211 and the input shaft of the reducer 212, and also has a buffering and vibration damping function. For example, the coupling 213 in this embodiment can be a flexible coupling.

[0062] like Figure 6 and Figure 7As shown, the drive shaft 220 includes a solid shaft 221, a hollow shaft 222, and a fixing part 223. The solid shaft 221 is connected to the power assembly 210, and the hollow shaft 222 is connected between the solid shaft 221 and the rotating bearing assembly 230. The solid shaft 221 is rotatably fitted into the fixing part 223, which is configured to penetrate through the external wall. The fixing part 223 is used to install the solid shaft 221 in the external wall, and the external wall is used to isolate the power assembly 210 from the radioactive environment.

[0063] In this embodiment, the external wall can be the wall of the feeding hot chamber, and the drive shaft 220 passes through the external wall to transmit the power provided by the power assembly 210 outside the feeding hot chamber to the rotating bearing assembly 230 inside the feeding hot chamber.

[0064] In this embodiment, the solid shaft 221 penetrates the external wall, while the hollow shaft 222 is suspended between the external wall and the rotating load-bearing assembly 230. Using a solid shaft 221 for the portion penetrating the wall increases the strength and torsional resistance of the drive shaft 220, while using a hollow shaft 222 for the suspended portion reduces the deflection caused by the drive shaft 220's own weight, effectively ensuring the horizontality of the drive shaft 220. Furthermore, the solid shaft 221 and the hollow shaft 222 can be connected by welding.

[0065] In some embodiments, the fixing part 223 encloses the solid shaft 221, allowing the solid shaft 221 to rotatably pass through the exterior wall. For example... Figure 7 As shown, in some embodiments, the fixing part 223 includes a first fixing part 2231, a second fixing part 2232, and a support part 2233. The first fixing part 2231 is disposed within the outer wall, and the second fixing part 2232 is detachably fixed within the first fixing part 2231 and sleeved on the outside of the solid shaft 221. The support part 2233 is disposed between the second fixing part 2232 and the solid shaft 221, and the support part 2233 is configured to rotatably support the solid shaft 221 within the second fixing part 2232.

[0066] In this embodiment, the solid shaft 221 is wrapped with a first fixing part 2231 and a second fixing part 2232. This not only allows the solid shaft 221 to be stably and rotatably supported in the external wall, but also enables the disassembly and assembly of the drive shaft 220. During disassembly, the connection between the drive shaft 220 and the rotating bearing assembly 230 is first disconnected, then the connection between the first fixing part 2231 and the second fixing part 2232 is disconnected, and finally the second fixing part 2232 and the drive shaft 220 are removed together from the external wall, thus disassembling the drive shaft 220.

[0067] For example, the first fixing part 2231 is fitted into the outer wall, and the first fixing part 2231 and the second fixing part 2232 are detachably connected by fasteners, thereby enabling the disassembly of the first fixing part 2231 and the second fixing part 2232. Furthermore, the second fixing part 2232 can also be connected to the solid shaft 221 by fasteners. In some embodiments, the first fixing part 2231 can be a first bushing, the second fixing part 2232 can be a second bushing, the support part 2233 can be a bearing, and the fastener can be a bolt.

[0068] During disassembly, first disconnect the drive shaft 220 from the rotating bearing assembly 230. Then, remove the bolts connecting the first fixing part 2231 and the second fixing part 2232. Next, attach a sealing bag to the end of the first fixing part 2231 to shield against nuclear radiation in the feeding hot chamber. Finally, pull the second fixing part 2232 and the drive shaft 220 together from the outer wall into the sealing bag to disassemble the drive shaft 220.

[0069] like Figure 8 and Figure 9 As shown, in some embodiments, the rotating bearing assembly 230 includes a bearing portion 231, a body portion 232, a power input portion 233, and a power output portion 234. The rotating hopper 100 is supported on the bearing portion 231, which is rotatably mounted on the body portion 232. A drive shaft 220 is connected to the power input portion 233 and is used to drive the power input portion 233 to rotate about a first axis parallel to the axis of the drive shaft 220. The power input portion 233 is configured to drive the power output portion 234 to rotate, and the power output portion 234 drives the bearing portion 231 to rotate about a second axis perpendicular to the first axis.

[0070] Specifically, the rotation axis of the power input unit 233 is parallel to the bearing surface of the bearing unit 231 and also parallel to the axial direction of the transmission shaft 220. Conversely, the rotation axis of the power output unit 234 is perpendicular to the bearing surface of the bearing unit 231 and also perpendicular to the axial direction of the transmission shaft 220. By providing the power input unit 233 and the power output unit 234, the torsional force input from the transmission shaft 220 is converted into a torsional torque perpendicular to it in another direction. This enables the rotational reversal function of the bearing unit 231 and facilitates the rational arrangement of the relative positions and connection methods of the rotating bearing assembly 230 and the power assembly 210.

[0071] In some embodiments, the magnitude of the torsional torque can be controlled by controlling the output power of the power assembly 210. The rotation angle of the bearing portion 231 can be controlled by controlling the rotation angle of the drive shaft 220. For example, the bearing portion 231 can be rotated 180 degrees, thereby causing the rotating hopper 100 carried by the bearing portion 231 to rotate 180 degrees in the horizontal direction, realizing the switching of the rotating hopper 100 between the receiving station and the feeding station, as well as the reversal of the spent fuel assembly within the rotating hopper 100.

[0072] In some embodiments, the power output part 234 is fixedly connected to the support part 231, so that the support part 231 and the power output part 234 can rotate synchronously. The fixed connection method between the power output part 234 and the support part 231 includes, but is not limited to, interference fit, key connection, etc.

[0073] like Figure 8 As shown, the power input section 233 is partially disposed outside the main body section 232, and the other part is disposed inside the main body section 232. One end of the power input section 233 extending out of the main body section 232 is connected to the drive shaft 220, thereby providing power to the power input section 233 via the drive shaft 220.

[0074] like Figure 9 As shown, in some embodiments, the power input section 233 is a worm gear, and the power output section 234 is a worm wheel, with the worm gear meshing with the worm wheel. For example... Figure 10 As shown, the power assembly 210 drives the transmission shaft 220 to rotate, which in turn drives the worm gear to rotate. The rotation of the worm gear drives the worm wheel to rotate, which in turn drives the entire bearing section 231 to rotate. The worm gear structure has high precision, enabling accurate control of the rotation angle, and is highly reliable and not easily damaged. Furthermore, the worm gear structure has a speed reduction effect, preventing the bearing section 231 from rotating excessively due to inertia, thus achieving stable control of the rotation of the bearing section 231.

[0075] Furthermore, the drive shaft 220 can drive the power input unit 233 and the power output unit 234 to rotate forward or in reverse, thereby enabling the bearing unit 231 to rotate both forward and in reverse, so as to realize the switching of the rotating hopper 100 between the receiving station and the feeding station.

[0076] like Figure 8 As shown, in some embodiments, the support portion 231 is provided with multiple lifting components 235, which are used to connect with external lifting equipment to realize the lifting and disassembly of the rotating support assembly 230. The body portion 232 can be a box structure, and the body portion 232 has space to accommodate other components. For example, the power input portion 233 and the power output portion 234 can be located inside the body portion 232.

[0077] like Figure 9As shown, in some embodiments, the rotating bearing assembly 230 further includes a support portion 236, which is disposed between the bearing portion 231 and the body portion 232, such that the bearing portion 231 is rotatably supported by the support portion 236, and the support portion 236 can stably support the bearing portion 231. Optionally, the support portion 236 can be a slewing bearing capable of withstanding large axial and radial loads and overturning moments.

[0078] In some embodiments, the support portion 231 and the body portion 232 are sealed together, the support portion 231 is rotatable relative to the body portion 232 and the connection is sealed to prevent the structure inside the body portion 232 from being contaminated.

[0079] like Figure 8 As shown, in some embodiments, the main body 232 is provided with an air inlet pipe 237, which is used to supply gas into the main body 232, so that the main body 232 can maintain a positive pressure against the outside, thereby effectively preventing external dust and other impurities from entering the main body 232, and further ensuring the seal between the support part 231 and the main body 232. For example, the air inlet pipe 237 can be provided on the side of the main body 232.

[0080] like Figure 2 and Figure 3 As shown, in some embodiments, the rotary switching device 200 further includes a coupling 240, which is connected between the power input unit 233 and the drive shaft 220 to compensate for radial and axial errors between the power input unit 233 and the drive shaft 220.

[0081] like Figure 11 As shown, the coupling 240 in this embodiment includes a coupling body 241 and a drive assembly. The end of the drive shaft 220 away from the power assembly 210 is detachably connected to one end of the coupling body 241, and the power input unit 233 is connected to the other end of the coupling body 241. The drive assembly is connected to the coupling body 241 and is used to drive the coupling body 241 to move axially along the drive shaft 220, so that the drive shaft 220 is connected to or detached from the coupling body 241.

[0082] In this embodiment, the drive assembly drives the coupling body 241 to move axially along the drive shaft 220, allowing the drive shaft 220 to quickly disengage from the coupling body 241. This enables rapid disassembly of the drive shaft 220 from the coupling 240, facilitating the removal of the drive shaft 220 or the rotating load-bearing assembly 230. Furthermore, the drive shaft 220 can be inserted into the coupling body 241, enabling rapid installation between the drive shaft 220 and the coupling 240. By providing the coupling 240, this embodiment allows for rapid connection and disconnection between the drive shaft 220 and the power input section 233 of the rotating load-bearing assembly 230.

[0083] like Figure 11 and Figure 12 As shown, in some embodiments, the drive assembly includes a support member 242, a swing member 243, a connecting shaft 244, and a sliding member 245. The support member 242 is fixed to the rotary bearing assembly 230; for example, the support member 242 can be fixed to the side of the body portion 232. The support member 242 is provided with a first limiting hole 246 and a second limiting hole 247. One end of the swing member 243 is inserted into the first limiting hole 246 or the second limiting hole 247, and the other end of the swing member 243 is connected to the connecting shaft 244. The connecting shaft 244 is rotatably mounted on the support member 242 and is perpendicular to the drive shaft 220. One end of the sliding member 245 is connected to the connecting shaft 244, and the other end of the sliding member 245 is slidably connected to the coupling body 241.

[0084] Among them, such as Figure 13 As shown, when the swing member 243 is positioned in the first limiting hole 246, the coupling body 241 is connected to the drive shaft 220; as Figure 14 As shown, when the swing member 243 is positioned in the second limiting hole 247, the drive shaft 220 disengages from the coupling body 241, allowing for the disassembly of the drive shaft 220 or the rotating bearing assembly 230. When the swing member 243 swings between the first limiting hole 246 and the second limiting hole 247, it drives the connecting shaft 244 and the sliding member 245 to rotate around the axis of the connecting shaft 244. When the sliding member 245 rotates, it drives the coupling body 241 to move axially along the drive shaft 220, thereby achieving the connection and disconnection between the drive shaft 220 and the coupling body 241.

[0085] In some embodiments, a limiting block 248 is provided on the support member 242. The limiting block 248 is used to limit the swinging member 243 from swinging between the first limiting hole 246 and the second limiting hole 247, so as to prevent the swinging member 243 from swinging excessively and causing excessive movement of the coupling body 241, which would affect the transmission shaft 220 or the power input part 233. Specifically, two limiting blocks 248 are provided on the support member 242 to limit the swing angle of the swinging member 243 so that the swinging member 243 swings between the first limiting hole 246 and the second limiting hole 247.

[0086] In some embodiments, the swing member 243 can be remotely controlled to swing between the first limiting hole 246 and the second limiting hole 247, thereby enabling quick installation and disassembly between the coupling 240 and the drive shaft 220. Specifically, as shown in the figure... Figure 11 As shown, the swing member 243 is provided with an operating part 2431 at the end away from the connecting shaft 244. The operating part 2431 facilitates remote operation by the robot arm, thereby realizing quick assembly and disassembly between the transmission shaft 220 and the rotating bearing assembly 230.

[0087] When the coupling 240 is in operation, the swing member 243 is inserted into the first limiting hole 246, thereby restricting the position of the coupling body 241 and preventing the coupling body 241 from moving and disconnecting from the drive shaft 220 during the operation of the rotation switching device 200. When disassembly is required, the manipulator can be operated to move the operating part 2431 upward to pull the swing member 243 out of the first positioning hole, releasing the limiting of the coupling 240. Then, the manipulator can push the swing member 243 to move it and insert it into the second limiting hole 247, thereby driving the coupling body 241 to move axially along the drive shaft 220 to disconnect the connection between the drive shaft 220 and the coupling body 241. Conversely, moving the swing member 243 and inserting it into the first limiting hole 246 can achieve a quick connection between the coupling 240 and the drive shaft 220.

[0088] In some embodiments, a connecting cylinder is provided on the support member 242, and a connecting shaft 244 is rotatably disposed within the connecting cylinder, thereby enabling the connecting shaft 244 to rotate relative to the support member 242. A bearing is provided between the connecting shaft 244 and the connecting cylinder to support the rotation of the connecting shaft 244 within the connecting cylinder.

[0089] like Figure 11 As shown, in some embodiments, the coupling body 241 is cylindrical, and its interior forms a receiving space for accommodating the drive shaft 220 and the power input part 233. The drive shaft 220 is inserted into the coupling body 241 from one end, and the power input part 233 is inserted into the coupling body 241 from the other end, thereby realizing the transmission connection between the drive shaft 220 and the power input part 233.

[0090] In some embodiments, the inner surface of the coupling body 241 is provided with a toothed portion 2411, in which multiple teeth are arranged circumferentially along the coupling body 241 and each tooth extends axially along the coupling body 241. Both ends of the coupling body 241 are provided with toothed portions 2411, and the ends of the drive shaft 220 and the power input portion 233 are provided with toothed mating portions that mesh with the toothed portions 2411. Through the meshing of the toothed portions 2411 and the toothed mating portions, the connection and transmission between the coupling body 241 and the drive shaft 220 and the power input portion 233 are realized. In some embodiments, the coupling body 241 is a drum-shaped toothed sleeve.

[0091] When the coupling body 241 moves axially along the drive shaft 220, the drive shaft 220 can be inserted into the coupling body 241 and mesh with the toothed portion 2411, thereby enabling the drive shaft 220 to drive the coupling body 241 to rotate. Simultaneously, the power input portion 233 is connected to the coupling body 241 and meshes with the toothed portion 2411 at the other end of the coupling body 241, so that when the coupling body 241 rotates, it drives the power input portion 233 to rotate, thus realizing the transmission of power.

[0092] like Figure 11 As shown, in some embodiments, a sliding groove 2412 is provided on the coupling body 241, and the sliding groove 2412 is arranged along the circumferential direction of the coupling body 241. A sliding member 245 is slidably connected in the sliding groove 2412, and the sliding member 245 surrounds a portion of the coupling body 241. Specifically, when the swing member 243 swings between the first limiting hole 246 and the second limiting hole 247 and drives the sliding member 245 to rotate, the sliding member 245 slides in the sliding groove 2412 to counteract the movement of the sliding member 245 in the radial direction of the drive shaft 220, thereby driving the coupling body 241 to move axially along the drive shaft 220; when the drive shaft 220 drives the coupling body 241 and the power input part 233 to rotate, the sliding member 245 slides in the sliding groove 2412 to make the coupling body 241 rotate relative to the sliding member 245.

[0093] In some embodiments, the swing member 243 is perpendicular to the connecting shaft 244, and the connecting shaft 244 is perpendicular to the transmission shaft 220. Specifically, the connecting shaft 244 is perpendicular to the bearing surface of the bearing portion 231. When one end of the swing member 243 moves between the first limiting hole 246 and the second limiting hole, it makes a circular motion around the axis of the connecting shaft 244, and at the same time drives the connecting shaft 244 to rotate. When the connecting shaft 244 rotates, it drives the sliding member 245 connected to it to make a circular motion around the axis of the connecting shaft 244, so that the end of the sliding member 245 slides in the sliding groove 2412, and at the same time moves along the axial direction of the transmission shaft 220, thereby driving the coupling body 241 to move along the axial direction of the transmission shaft 220, so as to avoid the sliding member 245 driving the coupling body 241 to move radially, causing the coupling body 241 to get stuck and unable to move.

[0094] For example, the slider 245 can be a fork structure, which includes a connecting rod and a C-shaped member. The connecting rod connects the connecting shaft 244 and the C-shaped member. The C-shaped member surrounds the coupling body 241, and its end is disposed within a sliding groove 2412, allowing it to slide within the sliding groove 2412. Furthermore, there is a gap between the end of the C-shaped member and the surface of the sliding groove 2412, thereby allowing the C-shaped member to slide smoothly within the sliding groove 2412.

[0095] In some embodiments, a limiting portion is provided on the rotating bearing assembly 230 to fix the rotating hopper 100 and prevent the rotating hopper 100 from moving on the rotating bearing assembly 230. Specifically, the limiting portion is provided on the bearing portion 231 to fix the rotating hopper 100 to the bearing portion 231.

[0096] like Figure 15 and 16 As shown, the rotary hopper 100 includes a hopper body 110 and a mounting plate 120. The hopper body 110 is used to accommodate spent fuel assemblies, and the mounting plate 120 is fixed to both sides of the hopper body 110. Figure 17 As shown, the mounting plate 120 cooperates with the limiting part to limit the position of the hopper body 110 on the rotating bearing assembly 230.

[0097] like Figure 8 As shown, in some embodiments, the limiting portion includes a plurality of first limiting portions 2381 and a plurality of second limiting portions 2382. The plurality of first limiting portions 2381 are arranged on both sides of the mounting plate 120 along a first direction, for fixing the position of the rotating hopper 100 in the first direction. The plurality of second limiting portions 2382 are arranged on both sides of the mounting plate 120 along a second direction, for fixing the position of the rotating hopper 100 in the second direction, thereby ensuring that the rotating hopper 100 remains in a stable position relative to the support portion 231 when the support portion 231 rotates, so that the rotating hopper 100 rotates synchronously with the support portion 231. The first direction is the extension direction of the rotating hopper 100, and the second direction is perpendicular to the extension direction of the rotating hopper 100.

[0098] In some descriptions, a groove 121 is provided on the mounting plate 120 at a position corresponding to the limiting part, and the limiting part is located in the groove 121, thereby limiting the position of the rotating hopper 100.

[0099] In addition, the hopper body 110 is also equipped with a lifting component 111, which is used to connect with external lifting equipment to lift and remotely disassemble the rotating hopper 100. For example, the lifting component 111 can be a lifting ring.

[0100] In some embodiments, the rotary hopper 100 is supported on one side of the rotation axis of the support portion 231. When the support portion 231 rotates 180 degrees about its rotation axis, the rotary hopper 100 rotates eccentrically relative to the center of the support portion 231, so that after the eccentric rotation, the rotary hopper 100 is parallel to the original extension direction of the rotary hopper 100, thereby enabling the rotary hopper 100 to rotate to the receiving station or the feeding station.

[0101] like Figure 15 and Figure 16 As shown, in some embodiments, the rotary hopper 100 is provided with a positioning port 112. For example... Figure 18As shown, the feeding system also includes a snap-fit ​​assembly 500, which is mounted on the rotating hopper 100 and located at the positioning port 112. The snap-fit ​​assembly 500 can rotate with the rotating hopper 100. The snap-fit ​​assembly 500 is configured to be inserted into the rotating hopper 100 via the positioning port 112 and cooperate with the spent fuel assembly. It is used to restrict the position of the spent fuel assembly within the rotating hopper 100 when the rotating hopper 100 rotates, preventing the spent fuel assembly from sliding during rotation or during an earthquake, and also preventing the spent fuel assembly from being accidentally pulled back by the pusher gripper used to push the spent fuel assembly.

[0102] like Figure 19 As shown, in some embodiments, the snap-fit ​​assembly 500 includes a snap-fit ​​mounting portion 510, a snap-fit ​​portion 530, and a snap-fit ​​driving portion 520. The snap-fit ​​mounting portion 510 is mounted on the rotating hopper 100, and has a receiving space within it. An opening is provided at the bottom of the snap-fit ​​mounting portion 510, corresponding to the position of the positioning port 112. The snap-fit ​​portion 530 is movably disposed within the receiving space and matches the spent fuel assembly. The snap-fit ​​driving portion 520 is disposed on the snap-fit ​​mounting portion 510 and connected to the snap-fit ​​portion 530. The snap-fit ​​driving portion 520 is used to drive the snap-fit ​​portion 530 to move up and down.

[0103] Among them, such as Figure 20 and Figure 21 As shown, when the rotary hopper 100 rotates, the snap fastener 530 is configured to descend into the rotary hopper 100 via the opening and positioning port 112 and press against the spent fuel assembly 1 to limit the spent fuel assembly 1 and prevent it from shifting during rotation. When the rotary hopper 100 rotates to its position, for example, when the rotary hopper 100 rotates to the feeding station, the snap fastener 530 rises into the receiving space of the snap fastener mounting part 510 to release the limitation on the spent fuel assembly, so as to facilitate the pushing of the spent fuel assembly into the rotary hopper 100 and push the spent fuel assembly into the shearing device.

[0104] like Figure 20 and Figure 21 As shown, in some embodiments, the snap fastener 530 is a pressure plate with a limiting groove 531. The limiting groove 531 matches the spent fuel assembly 1, so that when the snap fastener 530 descends into the rotating hopper 100, the spent fuel assembly 1 can be pressed into the limiting groove 531 to prevent the spent fuel assembly from sliding or moving during rotation or earthquakes, thus ensuring safety.

[0105] like Figure 19 and Figure 20As shown, in some embodiments, the snap-fit ​​drive unit 520 is a cylinder, and the snap-fit ​​drive unit 520 is provided with an air intake pipe 521 for supplying gas to the cylinder. For example, the cylinder is provided with two air intake pipes 521, which can be respectively arranged on both sides of the piston of the cylinder, and the cylinder is supplied with gas from the two air intake pipes 521 respectively, so that the cylinder can output power from two opposite directions, thereby driving the snap-fit ​​unit 530 to rise and fall.

[0106] In some embodiments, such as Figure 9 As shown, the rotating support assembly 230 also includes an air supply pipe 239, which is disposed within the body portion 232. An air inlet 2391 of the air supply pipe 239 is located in the body portion 232 and is used to connect to an air source. An air outlet 2392 of the air supply pipe 239 is located on the support portion 231 and is used to connect to a snap-fit ​​drive portion 520 to supply the gas required for driving the snap-fit ​​drive portion 520. In some embodiments, the air inlet 2391 of the air supply pipe 239 is located on the side of the body portion 232, and the air outlet 2392 is located at the rotation center of the support portion 231. Furthermore, the air supply pipe 239 is rotatably connected to the support portion 231, so that the outlet of the air supply pipe 239 does not rotate when the support portion 231 rotates.

[0107] In this embodiment, the air supply pipe 239 is disposed inside the main body 232, so that when the bearing part 231 and the rotating hopper 100 and the snap fastening assembly 500 carried by the bearing part 231 rotate, the air supply pipe 239 will not rotate, and the connecting pipe between the air supply pipe 239 and the snap fastening drive part 520 can make a circular motion with the air outlet 2392 of the air supply pipe 239 as the center. The connecting pipe between the air source and the air supply pipe 239 will not be displaced, thus avoiding the connecting pipe from moving and getting tangled when the snap fastening assembly 500 moves with the rotating hopper 100, or even affecting the rotation of the rotating hopper 100.

[0108] In some embodiments, the main body 232 is provided with two air supply pipes 239, which are respectively connected to two air inlet pipes 521 of the snap fastener drive unit 520, thereby supplying air to the cylinder, which serves as the snap fastener drive unit 520, from different directions to drive the snap fastener 530 to rise and fall.

[0109] In some embodiments, the mounting plate 120 is provided with a clearance groove 122, the position of which corresponds to the air outlet 2392 of the air supply pipe 239. The air outlet 2392 is located in the clearance groove 122, so that the air supply pipe 239 does not rotate when the bearing part 231 and the rotating hopper 100 rotate.

[0110] like Figure 22 and Figure 23As shown, in some embodiments, the pushing device 400 includes a power assembly 410, a drive shaft 420, a chain assembly, and a pushing assembly. One end of the drive shaft 420 is connected to the power assembly 410, which drives the drive shaft 420 to rotate. The chain assembly is driven to the other end of the drive shaft 420, which drives the chain assembly to reciprocate. The pushing assembly is disposed within the pushing hopper 300 and is connected to the chain assembly. The chain assembly drives the pushing assembly to move within the pushing hopper 300 and the rotating hopper 100, thereby pushing the spent fuel assembly within the rotating hopper 100 to the shearing device.

[0111] In this embodiment of the invention, when the rotating hopper 100 is docked with the pushing hopper 300, the power component 410 drives the chain assembly to move within the pushing hopper 300 and the rotating hopper 100, thereby moving the pushing component and pushing the spent fuel assembly within the rotating hopper 100 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 the cutting of the spent fuel assembly into short segments of a predetermined length.

[0112] In some embodiments, the power assembly 410 is the same as the power assembly 210 in the rotary switching device 200, and will not be described again here. In some embodiments, the drive shaft 420 is the same as the drive shaft 220 in the rotary switching device 200, and will not be described again here.

[0113] In some embodiments, the pusher hopper 300, chain assembly, and pusher assembly are disposed within the feeding hot chamber to shield the spent fuel assembly from radioactive radiation, thus providing protection. In some embodiments, the power assembly 410 is disposed outside the radioactive environment in which the pusher hopper 300, chain assembly, and pusher assembly are located; for example, the power assembly 410 is disposed outside the feeding hot chamber to prevent the power assembly 410 from being affected by radioactive radiation and thus from affecting its normal operation. Furthermore, the drive shaft 420 penetrates the external wall to transmit the power provided by the power assembly 410 outside the feeding hot chamber to the chain assembly inside the feeding hot chamber.

[0114] In some embodiments, the power assembly 210 and drive shaft 220 of the rotary switching device 200 and the power assembly 410 and drive shaft 420 of the pushing device 400 are arranged on the same side of the pushing hopper 300 and the rotating hopper 100, so that the various components are arranged compactly, thereby reducing the area occupied by the feeding system.

[0115] like Figure 24 and Figure 25As shown, in some embodiments, the chain assembly 430 includes a sprocket 431 and a chain 432. The sprocket 431 is disposed within the push hopper 300 and is connected to a drive shaft 420, which drives the sprocket 431 to rotate. The chain 432 is connected to the push assembly 440 and cooperates with the sprocket 431. Rotation of the sprocket 431 drives the chain 432 to move, thereby driving the push assembly 440 to move. The movement of the push assembly 440 pushes the spent fuel assembly within the rotating hopper 100, thereby realizing the push of the spent fuel assembly.

[0116] In some embodiments, the sprocket 431 includes a sprocket shaft 4311 and a sprocket body 4312. The sprocket shaft 4311 is connected to a drive shaft 420, which drives the sprocket shaft 4311 to rotate. The sprocket body 4312 is sleeved outside the sprocket shaft 4311, and the sprocket shaft 4311 drives the sprocket body 4312 to rotate. The sprocket body 4312 cooperates with the chain 432, and the rotation of the sprocket body 4312 drives the chain 432 to move.

[0117] like Figure 22 and Figure 23 As shown, in some embodiments, the pushing device 400 further includes a coupling 450, which is connected between the sprocket 431 of the chain assembly 430 and the drive shaft 420, and is used to compensate for radial and axial errors between the sprocket 431 and the drive shaft 420. In some embodiments, the coupling 450 is the same as the coupling 240 of the rotation switching device 200, and will not be described again here.

[0118] like Figure 26 As shown, in some embodiments, the chain 432 includes a plurality of first chain plates 4321, a plurality of second chain plates 4322, and a plurality of pins 4323. The plurality of first chain plates 4321 cooperate with each other, the plurality of second chain plates 4322 cooperate with each other, and the first chain plates 4321 and second chain plates 4322 are fixedly connected by pins 4323. In this embodiment, the chain 432 includes a plurality of chain plates that cooperate with each other, allowing the movement of the chain 432 to be controlled in units of the length of one chain plate. In some embodiments, by controlling the chain plates in the chain 432, the chain 432 can be driven to turn. In some embodiments, the plurality of first chain plates 4321 are symmetrically arranged at both ends of the pin 4323, and the plurality of second chain plates 4322 are symmetrically arranged at both ends of the pin 4323.

[0119] In some embodiments, the first chain plate 4321 is disposed outside the second chain plate 4322. In some embodiments, the mating connections of the plurality of first chain plates 4321 and the mating connections of the plurality of second chain plates 4322 are staggered, that is, the plurality of first chain plates 4321 and the plurality of second chain plates 4322 do not overlap, which allows for more precise control of the movement and turning of the chain 432.

[0120] In some embodiments, the first chain plate 4321 and the second chain plate 4322 are rigid plates. Setting the first chain plate 4321 and the second chain plate 4322 as rigid plates can smoothly and accurately transmit the thrust or tension of the chain 432.

[0121] like Figure 25 As shown, in some embodiments, the sprocket 431 is provided with a plurality of receiving grooves 4313, which are evenly distributed along the circumference of the sprocket 431. The pin 4323 cooperates with the receiving groove 4313, so that the rotation of the sprocket 431 can drive the pin 4323 to move, thereby driving the chain 432 to move. In some embodiments, the receiving groove 4313 is provided in the sprocket body 4312. When the sprocket 431 rotates, the pin 4323 located in the receiving groove 4313 moves with the rotation of the sprocket 431, thereby driving the chain 432 to move; at the same time, the movement of the chain 432 can drive the subsequent pin 4323 into the receiving groove 4313 of the sprocket 431, so that the chain 432 can move continuously. In addition, the inner side of the receiving groove 4313 is inclined to facilitate the entry of the pin 4323 into the receiving groove 4313.

[0122] like Figure 27 and Figure 28 As shown, in some embodiments, the chain assembly 430 further includes an inner chain box 433 and an outer chain box 434. The chain 432 is disposed in the inner chain box 433, which is provided with a track. The chain 432 is disposed on the track and can move along the track. The outer chain box 434 is configured to accommodate the inner chain box 433, and a gap is provided between the inner chain box 433 and the outer chain box 434 so that the inner chain box 433 can be directly disengaged through the gap. The inner chain box 433 and the outer chain box 434 are each provided with a liquid flow structure so that liquid for rinsing the chain assembly 430 can flow out from the outer chain box 434 through the inner chain box 433. This embodiment, through the combination of the inner chain box 433, the outer chain box 434, the chain 432, and the liquid flow structure, allows for convenient cleaning of the chain assembly 430.

[0123] like Figure 29 and Figure 30 As shown, in some embodiments, the inner chain box 433 includes an inner plate 4331 and an outer plate 4332. The inner plate 4331 is provided with a track 4334, and the chain 432 is disposed on the track 434 and can move along the track 4334. The liquid flow structure includes an opening 4335 formed on the outer plate 4332.

[0124] In some embodiments, the track 4334 may be annular, including straight segments and curved segments, and is disposed around the inner side of the inner plate 4331. In some embodiments, the annular track 4334 may be configured to wrap around the inner plate 4331 multiple times to accommodate a longer chain. In some embodiments, the track 4334 may be a guide groove on the inner plate 4331. For example, a guide groove may be provided on the outer surface of the inner plate 4331, and the guide groove may be configured to wrap around the inner plate 4331 multiple times, with the guide groove serving as the track 4334, and the chain 432 disposed in the guide groove and movable along the guide groove.

[0125] In some embodiments, the lengths of the first chain plate 4321 and the second chain plate 4322 of the chain 432 are both less than the length of the straight segment of the track 4334, and the lengths of the first chain plate 4321 and the second chain plate 4322 are both less than the radius of the curved segment of the track 4334, thereby enabling the chain 432 to turn. In some embodiments, when the chain 432 moves, the length of the first chain plate 4321 or the second chain plate 4322 can be used as a unit of movement.

[0126] In some embodiments, the mating connections of multiple first chain plates 4321 and multiple second chain plates 4322 are staggered. The distance between the staggered mating connections of the first chain plates 4321 and second chain plates 4322 is less than the length of the straight segment of the track 4334, and the distance between the staggered mating connections of the first chain plates 4321 and second chain plates 4322 is less than the radius of the curved segment of the track 4334. This facilitates turning of the chain 432 and allows for precise control of its movement. In some embodiments, when the chain 432 moves, the distance between the staggered mating connections of the first chain plates 4321 and second chain plates 4322 can be considered as one unit of movement. Through the above-described structural arrangement of the chain 432, the length of the pushed spent fuel assembly can be precisely controlled.

[0127] In some embodiments, a bushing is provided on the pin 4323 between the first chain plate 4321 and the second chain plate 4322, and the bushing cooperates with the track 4334; a roller 4324 is provided on the pin 4323 outside the first chain plate 4321 or the second chain plate 4322. By providing the bushing, the wear of the chain 432 during movement can be reduced. By providing the roller 4324, the smoothness of the chain 432 during movement can be enhanced.

[0128] In some embodiments, the track 4334 can be a guide groove on the inner plate 4331 that passes through the inner plate 4331. A plurality of first chain plates 4321 and second chain plates 4322 connected in pairs are respectively distributed on both sides of the guide groove. The first chain plate 4321 is disposed outside the second chain plate 4322, and the roller 4324 is disposed outside the first chain plate 4321 and connected to the first chain plate 4321.

[0129] In some embodiments, when cleaning the chain assembly 430, the inner chain box 433 can be pulled out from the outer chain box 434, and the inner chain box 433 and the chain 432 can be cleaned outside the outer chain box 434. In some embodiments, when cleaning the chain assembly 430, it is not necessary to pull the inner chain box 433 out from the outer chain box 434; the inner chain box 433 and the chain 432 contained in the outer chain box 434 can be cleaned directly, and the liquid used to rinse the chain assembly 430 can flow out from the outer chain box 434 through the inner chain box 433 via the liquid flow structure.

[0130] In some embodiments, when cleaning the chain assembly 430, it can be decided whether to pull the inner chain box 433 out of the outer chain box 434 for cleaning, depending on the actual situation. In some embodiments, when the chain 432 needs to be replaced, the inner chain box 433 and the chain 432 can be pulled out of the outer chain box 434, and then the inner chain box 433 and the chain 432 can be cleaned outside the outer chain box 434; when the chain 432 does not need to be replaced, the inner chain box 433 and the chain 432 contained in the outer chain box 434 can be cleaned directly, and the liquid for rinsing the chain assembly 430 can flow out of the outer chain box 434 through the liquid flow structure via the inner chain box 433, thereby saving time and improving operating efficiency.

[0131] In some embodiments, the position of the opening 4335 and the position of the track 4334 are adapted for liquid outflow. For example... Figure 29 As shown, the opening 4335 can be positioned to correspond to a section of track 4334, allowing the liquid used to rinse that section of track 4334 to flow out from the opening 4335. Specifically, when both the inner chain box 433 and the chain 432 are located within the outer chain box 434, the liquid used to rinse the chain 432 and the inner chain box 433 can flow from the inner chain box 433 to the outer chain box 434 through the opening 4335. In some embodiments, such as... Figure 29 As shown, opening 4335 can be set to multiple.

[0132] In some embodiments, the inner chain box 433 may further include an outer panel 4332 and an inner panel 4331. For example... Figure 30 As shown, the outer plate 4332 and the inner plate 4331 can be fixed together by bolts and nuts 4336. Furthermore, the outer plate 4332 and the inner plate 4331 can be fixed together by multiple sets of bolts and nuts 4336. In some embodiments, the inner chain box 433 may also include a spacer 4337, which is disposed on the bolts for fastening the bolts and can support the chain 432.

[0133] like Figure 27 and Figure 31As shown, in some embodiments, the liquid flow structure includes a drain component 4341 disposed in the outer chain box 434, so that liquid flowing into the outer chain box 434 flows out of the outer chain box 434 through the drain component. In some embodiments, when cleaning the chain assembly 430, the inner chain box 433 and the chain 432 inside the outer chain box 434 can be directly rinsed. The liquid rinsing the chain assembly 430 can flow through the opening 4335 through the inner chain box 433 to the outer chain box 434, and the liquid flowing into the outer chain box 434 flows out of the outer chain box 434 through the drain component 4341.

[0134] like Figure 24 and Figure 25 As shown, in some embodiments, the pushing assembly 440 includes a pushing connection portion 441 and a pushing portion 442. The pushing connection portion 441 is disposed within the pushing hopper 300 and is connected to the chain 432 of the chain assembly 430. The chain 432 is used to drive the pushing connection portion 441 to move within the pushing hopper 300 and the rotating hopper 100. The pushing portion 442 is detachably connected to the pushing connection portion 441, and the pushing connection portion 441 is configured to push the pushing portion 442 to move. The pushing portion 442 is used to push the spent fuel assembly. In this embodiment, pushing the spent fuel assembly through the pushing portion 442 facilitates applying a pushing force to the spent fuel assembly, causing the spent fuel assembly to move.

[0135] In some embodiments, such as Figure 32 As shown, the end of the push connection part 441 away from the chain 432 is provided with a connecting protrusion 4411, such as... Figure 33 As shown, the pusher 442 is provided with a connecting groove 4421, and the connecting protrusion 4411 cooperates with the connecting groove 4421 so that the pusher 441 and the pusher 442 can be detachably connected, thereby realizing quick assembly and disassembly of the pusher 441 and the pusher 442, and facilitating the replacement of the pusher 442.

[0136] 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 442 can be replaced with a gripper to hold the spent fuel assembly, so as to move the spent fuel assembly back into the rotary hopper 100. In this embodiment, the pusher 442 is easily replaced by quick assembly and disassembly of the pusher connection 441 and the pusher 442.

[0137] In some embodiments, the push connection 441 includes a push body 4412 and a connecting protrusion 4411, with the connecting protrusion 4411 disposed at the bottom of the push body 4412. Simultaneously, a connecting groove 4421 is disposed at the bottom of the push part 442, and the connecting protrusion 4411 matches the connecting groove 4421, with the connecting protrusion 4411 being accommodated within the connecting groove 4421, thereby allowing the push connection 441 and the push part 442 to be detachably connected. Furthermore, when the push part 442 needs to be replaced, it is not necessary to disassemble the push connection 441; simply lifting the push part 442 upwards allows for the detachment of the push connection 441 and the push part 442.

[0138] like Figure 32 and Figure 33 As shown, in some embodiments, the push connection portion 441 is provided with rollers 4413, and multiple rollers 4413 are symmetrically arranged on both sides of the push connection portion 441, thereby reducing friction during the movement of the push connection portion 441 and making its movement smoother. In some embodiments, the push portion 442 is also provided with rollers 4422, and multiple rollers 4422 are symmetrically arranged on both sides of the push portion 442. The rotation axis of the rollers in the push assembly 440 is the same as that of the rollers 4324 of the chain 432.

[0139] like Figure 33 As shown, in some embodiments, the pushing part 442 includes a moving part 4423, a connecting rod 4424, and a pusher head 4425. The moving part 4423 is detachably connected to the pushing connection part 441. A roller 4422 is disposed on the moving part 4423 to reduce friction between the pushing part 442 and the pushing hopper 300 or the rotating hopper 100. The connecting rod 4424 connects the moving part 4423 and the pusher head 4425 to fix the pusher head 4425 to the end of the moving part 4423 away from the pushing connection part 441. The pusher head 4425 is used to push the spent fuel assembly. In some embodiments, the pusher head 4425 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 100.

[0140] like Figure 22 As shown, in some embodiments, the top of the push hopper 300 has an opening, and a cover 310 is connected to the opening of the push hopper 300 to seal the opening. The cover 310 is provided with a lifting member 311, which is used to connect to external lifting equipment for lifting and remote assembly / disassembly of the cover 310. For example, the lifting member 311 can be a T-shaped member.

[0141] like Figure 22As shown, in some embodiments, the push hopper 300 is disposed on the outer chain box 434, and the bottom of the push hopper 300 is provided with a connection port for connecting the push hopper 300 and the inner chain box 433, so that the chain 432 can move into the push hopper 300 through the connection port, so that the chain 432 can be connected to the push component 440. The end of the chain 432 that connects to the push component 440 is disposed inside the push hopper 300, so that the chain 432 and the push component 440 remain connected.

[0142] like Figure 25 As shown, in some embodiments, the pushing device 400 further includes a pushing limit detection element 460, which is disposed within the pushing hopper 300 and is used to detect whether the pushing component 440 has retracted into position. Figure 32 As shown, a limit detection trigger 4414 is provided on the push assembly 440, and the push limit detection member 460 is configured to generate a positioning signal when it contacts the limit detection trigger 4414. Specifically, the limit detection trigger 4414 can be provided on the push connection part 441, and the limit detection trigger 4414 can be a trigger protrusion protruding from the surface of the push connection part 441.

[0143] In some embodiments, after the spent fuel assembly is fully pushed into the shearing device, the chain 432 and the pushing assembly 440 return to their initial positions, and the pushing limit detection element 460 is used to detect whether the pushing assembly 440 has returned to its position. In some embodiments, the pushing limit detection element 460 can be a pneumatic sensor. When the limit detection trigger 4414 on the pushing assembly 440 collides with the pneumatic sensor in the pushing hopper 300, the pressure in the air path of the pneumatic sensor changes, thereby triggering the pushing limit detection element 460 to generate a positioning signal.

[0144] like Figure 25 As shown, in some embodiments, a push limiter 470 is provided inside the push hopper 300. The push limiter 470 cooperates with the push assembly 440 to limit the backward position of the chain 432. In some embodiments, the push limiter 470 matches the push connection 441 to limit the push assembly 440 from continuing to move toward the sprocket 431, thereby limiting the extreme position of the chain 432's backward movement and preventing the chain 432 from completely retracting into the inner chain box 433. At the same time, the push limiter 470 can also provide a standard zero point for the stroke calibration of the power assembly 410, facilitating the calibration of the power assembly 410's stroke.

[0145] In some embodiments, the push limiter 470 can be a limit stop, which can cooperate with the push body 4412 of the push connection 441 to limit the extreme position of the push component 440's retraction. Figure 25As shown, the pushing body 4412 is supported above the connecting protrusion 4411, and the pushing limiter 470 is located below the pushing body 4412. When the pushing component 440 retracts to its extreme position, the connecting protrusion 4411 contacts the pushing limiter 470, and the pushing limiter 470 prevents the connecting protrusion 4411 from retracting, thereby limiting the chain 432 from continuing to retract.

[0146] like Figure 22 As shown, in some embodiments, the feeding system further includes an air intake component 600, which is disposed in the push hopper 300. The air intake component 600 is used to introduce air into the push hopper 300, thereby causing the airflow to be blown from the push hopper 300 through the rotating hopper 100 to the shearing device, preventing dust generated in the shearing device during the shearing process from entering the feeding system. In this embodiment, when the rotating hopper 100 rotates to the feeding position, the rotating hopper 100 is connected to the push hopper 300, and the air intake component can introduce air into the push hopper 300, so that the airflow flows along the direction of the push hopper 300, the rotating hopper 100, and the shearing device, preventing dust in the shearing device from entering the feeding system with the airflow.

[0147] like Figure 34 and Figure 35 As shown, in some embodiments, the air intake assembly 600 includes an air intake pipe 610 and a liquid seal structure 620. The air intake pipe 610 is connected to the push hopper 300 and is used to intake air into the push hopper 300. The liquid seal structure 620 is disposed outside the air intake pipe 610 and stores a sealing liquid inside the liquid seal structure 620 to seal the air intake pipe 610 and the push hopper 300, so that the gas in the air intake pipe 610 can only flow into the push hopper 300.

[0148] like Figure 35 As shown, in some embodiments, the liquid seal structure 620 includes an outer sleeve 621 and an inner sleeve 622. The inner sleeve 622 is connected to and communicates with the pusher hopper 300. The outer sleeve 621 is sleeved outside the inner sleeve 622, with the bottom of the outer sleeve 621 closed and the bottom of the inner sleeve 622 having an opening, thereby allowing the outer sleeve 621 and the inner sleeve 622 to communicate through the bottom opening. An air inlet pipe 610 is fixed in the inner sleeve 622, with an outlet at the top of the air inlet pipe 610 located within the inner sleeve 622 and an inlet at the bottom of the air inlet pipe 610 located outside the outer sleeve 621.

[0149] The sealing liquid is stored in the outer sleeve 621 and the inner sleeve 622, and the liquid level of the sealing liquid does not exceed the outlet of the air inlet pipe 610, so that the gas entering the air inlet pipe 610 can only enter the push hopper 300 through its top opening and the top of the inner sleeve 622. In some embodiments, the sealing liquid is deionized water to avoid corrosion of the liquid seal structure 620.

[0150] In some embodiments, the liquid seal structure 620 further includes an inlet pipe 623 disposed within the outer sleeve 621, and the inlet pipe 623 is used to supply sealing liquid into the liquid seal structure 620. In some embodiments, the liquid seal structure 620 further includes an overflow pipe 624 disposed within the outer sleeve 621, and the overflow pipe 624 is located below the outlet of the air inlet pipe 610, 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 610 and blocking the air inlet pipe 610.

[0151] like Figure 1 and Figure 22 As shown, in some embodiments, the feeding system further includes a receiving transition chamber 710, which is used to connect to external feeding equipment. A rotary hopper 100 is disposed between the receiving transition chamber 710 and the shearing device, and the receiving transition chamber 710 is arranged parallel to the pushing hopper 300. When the rotary hopper 100 rotates to the receiving position, it connects with the receiving transition chamber 710, and the spent fuel assembly enters the rotary hopper 100 via the receiving transition chamber 710. In this embodiment, the receiving transition chamber 710 can connect the rotary hopper 100 and the upstream feeding equipment to facilitate the rotary hopper 100 receiving the spent fuel assembly.

[0152] In some embodiments, the receiving transition chamber 710, the pushing chamber 300, and the rotating hopper 100 are disposed within the feeding hot chamber, while the upstream feeding device is disposed outside the feeding hot chamber. To enable the pushing of spent fuel assemblies from the feeding device to the rotating hopper 100, the receiving transition chamber 710 is installed through the wall of the feeding hot chamber.

[0153] like Figure 22 As shown, an embedded part 711 is provided outside the receiving transition chamber 710. The embedded part 711 is installed in the external wall, and the receiving transition chamber 710 passes through the embedded part 711. The embedded part 711 is used to fix the receiving transition chamber 710 to avoid vibration and impact, and to ensure the stability of the receiving transition chamber 710. In some embodiments, the embedded part 711 is provided with anchor bolts, which are used to fix the embedded part 711 and the wall.

[0154] like Figure 1 and Figure 2As shown, in some embodiments, the feeding system further includes a feeding transition chamber 720. The feeding transition chamber 720 is fixedly disposed between the rotary hopper 100 and the shearing device, and its position corresponds to that of the push hopper 300. The feeding transition chamber 720 is used to connect to the external shearing device. Specifically, when the rotary hopper 100 rotates to the feeding station, both ends of the rotary hopper 100 are respectively connected to the push hopper 300 and the feeding transition chamber 720. The push device 400 is used to drive the spent fuel assembly within the rotary hopper 100 to move, thereby pushing the spent fuel assembly to the shearing device via the feeding transition chamber 720.

[0155] In some embodiments, the push hopper 300 and the rotary hopper 100 are disposed in the feeding hot chamber, while the shearing device is disposed in the shearing hot chamber. A wall is provided between the feeding hot chamber and the shearing hot chamber to shield against nuclear radiation. To facilitate the pushing of spent fuel assemblies from the rotary hopper 100 to the shearing device, a receiving transition chamber 710 is installed through the external wall.

[0156] In some embodiments, an embedded part 721 is provided outside the feeding transition chamber 720. The embedded part 721 is installed in the external wall to avoid vibration and impact and ensure the stability of the feeding transition chamber 720. In some embodiments, the embedded part 721 is the same as the embedded part 711 of the receiving transition chamber 710.

[0157] In some embodiments, the center lines of the push hopper 300 and the feeding transition hopper 720 coincide, and the receiving transition hopper 710 is arranged parallel to one side of the push hopper 300.

[0158] like Figure 36 As shown, when the rotating bearing assembly 230 drives the rotating hopper 100 to rotate to the receiving station, the rotating hopper 100 docks with the receiving transition chamber 710 so that the upstream feeding equipment can send the spent fuel assembly to the rotating hopper 100 via the receiving transition chamber 710.

[0159] like Figure 37 As shown, after the rotating bearing component 230 drives the rotating hopper 100 to rotate eccentrically by 180°, the rotating hopper 100 is in the feeding position. At this time, the two ends of the rotating hopper 100 are respectively connected to the pushing hopper 300 and the feeding transition hopper 720. The pushing component in the pushing hopper 300 moves into the rotating hopper 100 to push the spent fuel assembly in the rotating hopper 100 into the feeding transition hopper 720, and then pushes the spent fuel assembly into the shearing device through the feeding transition hopper 720 to realize the pushing and feeding of the spent fuel assembly.

[0160] like Figure 18 and Figure 22As shown, in some embodiments, the feeding system further includes an inflatable sealing assembly 800, which is disposed at the end of the push hopper 300 and / or the feeding transition hopper 720. The inflatable sealing assembly 800 is used to seal the connection between the push hopper 300 and the rotating hopper 100, and to seal the connection between the feeding transition hopper 720 and the rotating hopper 100. Specifically, when the rotating hopper 100 is in communication with the push hopper 300 and the feeding transition hopper 720, the inflatable sealing assembly 800 inflates to seal the connection between the rotating hopper 100 and the push hopper 300 / feeding transition hopper 720; when the rotating hopper 100 rotates, the inflatable sealing assembly 800 deflates, creating a gap between the push hopper 300 / feeding transition hopper 720 and the rotating hopper 100 to provide space for the rotation of the rotating hopper 100.

[0161] like Figure 38 As shown, the inflatable sealing assembly 800 includes a sealing mounting portion 810 and an inflatable pad 820. The sealing mounting portion 810 is installed at the end of the push hopper 300 or the feed transition hopper 720, and the inflatable pad 820 is installed on the sealing mounting portion 810, with the inflatable pad 820 facing the rotating hopper 100. Both the sealing mounting portion 810 and the inflatable pad 820 are annular and match the rotating hopper 100. The inflatable pad 820 forms a channel 821, which matches the spent fuel assembly. Thus, when the rotating hopper 100 is docked with the push hopper 300 and the feed transition hopper 720, the rotating hopper 100 can communicate with the push hopper 300 and the feed transition hopper, facilitating the movement of the push assembly in the push hopper 300 to the rotating hopper 100 and the pushing of the spent fuel assembly in the rotating hopper 100 to the feed transition hopper 720 via the channel 821.

[0162] 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 100 rotates to the feeding station, both ends of the rotating hopper 100 are respectively connected to the pushing hopper 300 and the feeding transition hopper 720. At this time, the inflation pad 820 is inflated through the inflation port 830 to fill the gap between the rotating hopper 100 and the pushing hopper 300 / feeding transition hopper 720, ensuring the feeding channel between the rotating hopper 100 and the pushing hopper 300 / feeding transition hopper 720 is sealed and preventing dust leakage. When the rotating hopper 100 starts to rotate, the inflation pad 820 deflates and retracts, thereby providing space for the rotation of the rotating hopper 100.

[0163] like Figure 39 and Figure 40 As shown, the ends of the push hopper 300 and the feeding transition hopper 720 are provided with connecting flanges 722. The connecting flanges 722 are provided with mounting grooves. The inflatable sealing assembly 800 is installed in the mounting grooves, thereby realizing the installation and fixation of the inflatable sealing assembly 800.

[0164] like Figure 41 As shown, in some embodiments, the feeding system further includes a positioning component 900, which is disposed in the push hopper 300 and / or the feeding transition hopper 720. The positioning component 900 is used to fix the position of the rotating hopper 100 when it rotates into place, so as to prevent the rotating hopper 100 from shifting after it rotates into place.

[0165] like Figure 42 As shown, in some embodiments, the positioning component 900 includes a positioning mounting component 910, a positioning drive unit 920, and a positioning unit 930. The positioning mounting component 910 is disposed on the push hopper 300 and / or the feeding transition hopper 720, the positioning drive unit 920 is mounted on the positioning mounting component 910, and the positioning unit 930 is connected to the positioning drive unit 920. The positioning drive unit 920 is used to drive the positioning unit 930 to move along the extending direction of the push hopper 300 and / or the feeding transition hopper 720.

[0166] like Figure 43 As shown, the rotating hopper 100 has a positioning hole 113 at its end. When the rotating hopper 100 rotates to its position, the positioning drive unit 920 drives the positioning unit 930 to move and insert into the positioning hole 113, so that the positioning component 900 is in a positioning state, thereby realizing the positioning of the rotating hopper 100. Figure 44 As shown, when the positioning part 930 moves out of the positioning hole 113, the positioning component 900 is in the open state, thereby releasing the positioning of the rotating hopper 100 and facilitating the rotation of the rotating hopper 100.

[0167] For example, the positioning drive unit 920 is a cylinder, and the cylinder is provided with an air inlet pipe 921 for supplying air to the cylinder. The positioning unit 930 is a positioning pin, and the cylinder can drive the positioning pin to move along the extension direction of the push hopper 300 and / or the feeding transition hopper 720, so that the positioning pin is inserted into or removed from the positioning hole 113 of the rotating hopper 100, so as to realize the positioning and rotation of the rotating hopper 100.

[0168] In some embodiments, both ends of the rotating hopper 100 are provided with positioning holes 113. The positioning holes 113 and the positioning part 930 are aligned with the rotation axis of the rotating hopper 100, so that when the rotating hopper 100 rotates to the receiving station and the feeding station, the positioning pin can be inserted into the positioning hole 113 at the end of the rotating hopper 100 to realize the positioning of the rotating hopper 100 at the receiving station and the feeding station.

[0169] In some embodiments, the positioning part 930 is provided with a limiting baffle 931, and the end of the positioning drive part 920 near the rotating hopper 100 is connected to a limiting mating part 924. When the positioning drive part 920 drives the positioning part 930 to move toward the rotating hopper 100, the limiting baffle 931 and the limiting mating part 924 cooperate to prevent the positioning part 930 from moving excessively.

[0170] like Figure 42 As shown, in some embodiments, the positioning and mounting assembly 910 includes a positioning fixing part 911 and a positioning power part 912. The positioning fixing part 911 is fixed to the push hopper 300 or the feeding transition hopper 720. The positioning power part 912 is rotatably disposed through the positioning fixing part 911. The positioning drive part 920 is movably disposed on the positioning power part 912. The positioning power part 912 is configured to drive the positioning drive part 920 to move along the axial direction of the positioning power part 912 when it is driven to rotate by an external force, thereby ensuring that the positioning part 930 is disengaged from the end of the rotating hopper 100 and the push hopper 300 / feeding transition hopper 720, so that the positioning drive part 920 can be lifted upward to achieve disassembly.

[0171] For example, the outer surface of the positioning power unit 912 is provided with threads, and the positioning drive unit 920 is provided with a threaded hole. The threaded hole matches the thread of the positioning power unit 912. When the positioning power unit 912 rotates under the drive of an external force, it can drive the positioning drive unit 920 to move along the axial direction of the positioning power unit 912. For example, the positioning power unit 912 is a lead screw.

[0172] In addition, the positioning drive unit 920 is provided with a guide unit 922, which is located at both ends of the positioning power unit 912, so that when the positioning power unit 912 rotates, the positioning drive unit 920 moves along the axial direction of the positioning power unit 912 without rotating.

[0173] In some embodiments, an operating handwheel 913 is provided at the end of the positioning power unit 912 away from the positioning drive unit 920, which facilitates remote operation by a robotic arm. The positioning drive unit 920 is provided with a lifting part 923, which is T-shaped, to facilitate remote clamping by external tools such as robotic arms, thereby enabling remote assembly and disassembly of the positioning drive unit 920.

[0174] like Figure 1 , Figure 22 and Figure 31 As shown, in some embodiments, the feeding system further includes a receiving support 10, a push hopper 300 and a receiving transition hopper 710 disposed on the receiving support 10, and the receiving support 10 is used to support the push hopper 300 and the receiving transition hopper 710.

[0175] In some embodiments, the receiving support base 10 has two spaced-apart push-feed bin support bases 11, with an outer chain box 434 disposed between the two push-feed bin support bases 11. A push-feed bin 300 is disposed on the push-feed bin support base 11, which supports the push-feed bin 300 so that the push-feed bin 300 is positioned on the outer chain box 434. In some embodiments, the outer chain box 434 can be fixed between the two push-feed bin support bases 11 to facilitate the lifting and removal of the inner chain box 433.

[0176] In some embodiments, by placing the pusher bin 300 on the outer chain box 434, the top opening of the outer chain box 434 can be sealed, thereby sealing the inner chain box 433 within the space formed by the outer chain box 434, preventing external dust from entering the inner chain box 433 and causing problems such as chain 432 jamming in the inner chain box 433, thus affecting the operation of the chain assembly 430.

[0177] In some embodiments, the receiving support 10 further includes a receiving transition chamber support 12, on which the receiving transition chamber 710 is supported. The receiving transition chamber support 12 is arranged parallel to the outer chain box 434.

[0178] In some embodiments, such as Figures 1 to 3 As shown, the feeding system also includes a feeding support 20, and a feeding transition chamber 720 is disposed on the feeding support 20. The feeding support 20 is used to support the feeding transition chamber 720.

[0179] In some embodiments, such as Figure 31 and Figure 45 As shown, the feeding system also includes a limiting member 30, which is disposed on the receiving support 10 and / or the feeding support 20. The limiting member 30 is used to limit the rotation position of the rotating hopper 100 to prevent the rotating hopper 100 from rotating excessively. In this embodiment, when the rotating hopper 100 rotates to its position (rotates to the receiving station or the feeding station), the side of the rotating hopper 100 contacts the limiting member 30, and the limiting member 30 can physically block the rotating hopper 100 to prevent the rotating hopper 100 from rotating excessively.

[0180] In some embodiments, such as Figure 31 and Figure 45As shown, the feeding system also includes a limit detection element 40, which is disposed on the receiving support 10 and / or the feeding support 20. The limit detection element 40 is used to detect whether the rotating hopper 100 has rotated to the correct position. When the rotating hopper 100 has rotated to the correct position, the side of the rotating hopper 100 contacts the limit detection element 40, thereby triggering the limit detection element 40 to send a position signal. Based on this position signal, the rotating hopper 100 is controlled to stop rotating to avoid over-rotation. For example, the limit detection element 40 is a pneumatic sensor. When the rotating hopper 100 collides with the pneumatic sensor, the pressure in the air path of the pneumatic sensor changes, thereby triggering the limit detection element to generate a position signal.

[0181] like Figure 15 and Figure 45 As shown, the rotating hopper 100 has two stops 114 on its side, which correspond to the positions of the limiting member 30 and the limiting detection member 40, respectively. When the rotating hopper 100 rotates to its position, the two stops 114 touch the limiting member 30 and the limiting detection member 40, respectively, to stop the rotation of the rotating hopper 100 by both physical and electrical signal control, thus preventing it from over-rotating.

[0182] 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.

[0183] 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 receiving system for receiving a spent fuel assembly and pushing the spent fuel assembly to a shearing device, characterized by, The application relates to a spent fuel assembly pushing device. The device comprises: a rotary bin used for accommodating the spent fuel assembly, the rotary bin being arranged to have a receiving station and a feeding station, and being provided with a positioning opening; a rotary switching device, wherein the rotary bin is arranged on the rotary switching device, and the rotary switching device is used for supporting and driving the rotary bin to rotate so as to switch between the receiving station and the feeding station; a pushing bin, wherein the rotary bin is selectively connected to the pushing bin in a sealed mode; a pushing device, wherein the pushing device is partially arranged in the pushing bin; a pressing buckle assembly, wherein the pressing buckle assembly is arranged on the rotary bin, and is arranged to be inserted into the rotary bin through the positioning opening and matched with the spent fuel assembly, so as to limit the position of the spent fuel assembly in the rotary bin when the rotary bin rotates; when the rotary bin rotates to the receiving station, the rotary bin is used for receiving the spent fuel assembly; when the rotary bin rotates to the feeding station, the rotary bin is connected to the pushing bin in a sealed mode, and the pushing device is used for driving the spent fuel assembly in the rotary bin to move, so as to push the spent fuel assembly to the shearing device; the pressing buckle assembly comprises a pressing buckle mounting part, a pressing buckle part and a pressing buckle driving part, the pressing buckle mounting part is arranged on the rotary bin, a containing space is formed in the pressing buckle mounting part, the bottom of the pressing buckle mounting part is provided with an opening, the opening corresponds to the position of the positioning opening, the pressing buckle part is movably arranged in the containing space, the pressing buckle part is matched with the spent fuel assembly, the pressing buckle driving part is arranged on the pressing buckle mounting part, the pressing buckle driving part is connected with the pressing buckle part, and the pressing buckle driving part is used for driving the pressing buckle part to ascend and descend; when the rotary bin rotates, the pressing buckle part is arranged to descend into the rotary bin through the opening and the positioning opening, so as to press the spent fuel assembly and limit the spent fuel assembly; the rotary switching device comprises a rotary bearing assembly; 2. The system of claim 1, wherein, the rotary bearing assembly comprises a bearing part, a body part and a gas conveying pipe, the rotary bin is borne by the bearing part, the bearing part is rotatably arranged on the body part, the gas conveying pipe is arranged in the body part, an air inlet of the gas conveying pipe is arranged on the body part, the air inlet is connected with a gas source, an air outlet of the gas conveying pipe is connected with the pressing buckle driving part, the air outlet is arranged at the rotation center of the bearing part, and the gas conveying pipe is rotatably connected with the bearing part. The rotary switching device comprises: a power assembly; a transmission shaft, one end of the transmission shaft is connected with the power assembly, and the power assembly is used for driving the transmission shaft to rotate; 3. The system of claim 2, wherein, wherein the rotary bearing assembly is drivingly connected with the other end of the transmission shaft, and the transmission shaft is used for driving the rotary bearing assembly to rotate around an axis perpendicular to the transmission shaft. The rotary bearing assembly comprises: A power input part, the transmission shaft is connected with the power input part, the transmission shaft is used to drive the power input part to rotate around the first axis; the first axis is parallel to the axis of the transmission shaft; A power output part, the power input part is arranged to drive the power output part to rotate, the power output part drives the bearing part to rotate around the second axis, the first axis is perpendicular to the second axis.

4. The system of claim 2, wherein, The rotation switching device further comprises: A coupling, the coupling is connected between the transmission shaft and the power input part, used to compensate the radial error and axial error between the power input part and the transmission shaft.

5. The system of claim 4, wherein, The coupling comprises: A coupling body, one end of the transmission shaft away from the power assembly is detachably connected to one end of the coupling body, the power input part is connected to the other end of the coupling body; A driving assembly, the driving assembly is connected with the coupling body, used to drive the coupling body to move along the axial direction of the transmission shaft, so that the transmission shaft is connected to or separated from the coupling body.

6. The system of claim 5, wherein, The driving assembly comprises: A support, the support is fixed to the rotating bearing assembly, the support is provided with a first limiting hole and a second limiting hole; A swing piece, one end of the swing piece is inserted into the first limiting hole or the second limiting hole; A connecting shaft, the connecting shaft is rotatably installed on the support, the connecting shaft is perpendicular to the transmission shaft, the other end of the swing piece is connected with the connecting shaft; A sliding piece, one end of the sliding piece is connected with the connecting shaft, the other end of the sliding piece is slidably connected to the coupling body; When the swing piece is positioned in the first limiting hole, the coupling body is connected with the transmission shaft; when the swing piece is positioned in the second limiting hole, the transmission shaft is separated from the coupling body; When the swing piece swings between the first limiting hole and the second limiting hole, the connecting shaft and the sliding piece are driven to rotate around the axis of the connecting shaft, and the sliding piece drives the coupling body to move along the axial direction of the transmission shaft when rotating.

7. The system of claim 6, wherein, The coupling body is provided with a sliding groove, the sliding groove is arranged along the circumferential direction of the coupling body; The sliding piece is slidably connected in the sliding groove, and the sliding piece surrounds part of the coupling body outside; When the swing piece swings between the first limiting hole and the second limiting hole and drives the sliding piece to rotate, the sliding piece slides in the sliding groove to drive the coupling body to move along the axial direction of the transmission shaft; When the transmission shaft drives the coupling body and the power input part to rotate, the sliding piece slides in the sliding groove to make the coupling body rotate relative to the sliding piece.

8. The system of claim 1, wherein, The pushing device comprises: A power assembly; A transmission shaft, one end of the transmission shaft is connected with the power assembly, the power assembly is used to drive the transmission shaft to rotate; A chain assembly, the chain assembly is drivingly connected with the other end of the transmission shaft, the transmission shaft is used to drive the chain assembly to reciprocate. A pushing assembly is arranged in the pushing feed bin, and the pushing assembly is connected with the chain assembly, the chain assembly is used to drive the pushing assembly to move in the pushing feed bin and the rotating feed bin, so as to push the spent fuel assembly in the rotating feed bin to move to the shearing device.

9. The system of claim 8, wherein, The chain assembly comprises: A sprocket is arranged in the pushing feed bin, and the sprocket is connected with the transmission shaft, and the transmission shaft is used to drive the sprocket to rotate; A chain is connected with the pushing assembly, and the chain is matched with the sprocket, so that the rotation of the sprocket can drive the chain to move.

10. The system of claim 8, wherein, The pushing assembly comprises: A pushing connecting part is connected with the chain of the chain assembly, and the chain is used to drive the pushing connecting part to move in the pushing feed bin and the rotating feed bin; A pushing part is detachably connected with the pushing connecting part, the pushing connecting part is arranged to push the pushing part to move, and the pushing part is used to push the spent fuel assembly.

11. The system of claim 8, wherein, The pushing device further comprises: A shaft coupling is connected between the sprocket of the chain assembly and the transmission shaft, and is used to compensate the radial error and axial error between the sprocket and the transmission shaft.

12. The system of claim 1, wherein, Further comprising: A material receiving transition bin is used to be connected with an external feeding device, the rotating feed bin is arranged between the material receiving transition bin and the shearing device, and the material receiving transition bin is arranged in parallel with the pushing feed bin; When the rotating feed bin rotates to the material receiving station, the rotating feed bin is communicated with the material receiving transition bin, and the spent fuel assembly enters the rotating feed bin through the material receiving transition bin.

13. The system of claim 1, wherein, Further comprising: A feeding transition bin is fixedly arranged between the rotating feed bin and the shearing device, and the feeding transition bin corresponds to the position of the pushing feed bin, and the feeding transition bin is used to be connected with an external shearing device; When the rotating feed bin rotates to the feeding station, the two ends of the rotating feed bin are respectively connected with the pushing feed bin and the feeding transition bin, and the pushing device is used to drive the spent fuel assembly in the rotating feed bin to move, so as to push the spent fuel assembly to the shearing device through the feeding transition bin.

14. The system of claim 12 or 13, wherein, Further comprising: An air charging sealing assembly is arranged at the end of the pushing feed bin and / or the feeding transition bin; When the rotating feed bin is communicated with the pushing feed bin and the feeding transition bin, the air charging sealing assembly is inflated to seal the connection between the rotating feed bin and the pushing feed bin or the feeding transition bin; When the rotating feed bin rotates, the air charging sealing assembly is deflated to provide space for the rotation of the rotating feed bin.

15. The system of claim 1, wherein, Further comprising: A positioning assembly is arranged in the pushing feed bin and / or the feeding transition bin, and the position of the positioning assembly corresponds to the rotation axis of the rotating feed bin, and the positioning assembly is used to fix the position of the rotating feed bin when the rotating feed bin rotates to the position.

16. The system of claim 15, wherein, The positioning assembly comprises: A positioning mounting assembly is arranged in the pushing feed bin and / or the feeding transition bin; A positioning driving part is mounted on the positioning mounting assembly; The positioning part is connected with the positioning driving part, and the positioning driving part is used to drive the positioning part to move along the extension direction of the push feeding bin and / or the feeding transition bin; The end of the rotary bin is provided with a positioning hole, and the position of the positioning hole and the positioning part corresponds to the rotation axis of the rotary bin; the positioning driving part is used to drive the positioning part to move and insert into the positioning hole after the rotary bin is rotated into position.

17. The system of claim 16, wherein, The positioning installation assembly comprises: The positioning fixed part is fixed to the push feeding bin and / or the feeding transition bin; The positioning power part is rotatably arranged in the positioning fixed part, and the positioning driving part is movably arranged in the positioning power part; the positioning power part is arranged to be driven to rotate by external force, so as to drive the positioning driving part to move along the axial direction of the positioning power part.

18. The system of claim 1, wherein, Further comprising: The push feeding bin and the feeding transition bin are arranged in the material receiving support seat, and the material receiving support seat is used to support the push feeding bin and the feeding transition bin; And / or, The feeding transition bin is arranged in the feeding support seat, and the feeding support seat is used to support the feeding support seat.

19. The system of claim 18, wherein, Further comprising: The limiting part is arranged in the material receiving support seat and / or the feeding support seat, and the limiting part is used to limit the rotation position of the rotary bin.

20. The system of claim 18, wherein, Further comprising: The limiting detection part is arranged in the material receiving support seat and / or the feeding support seat, and the limiting detection part is used to detect whether the rotary bin is rotated into position.

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