Splicing device for spent fuel assemblies

Abstract

The embodiment of the present application relates to the technical field of spent fuel reprocessing, and specifically discloses a shearing device for spent fuel assemblies. The shearing device comprises a box body, a fixed blade assembly, and a pressing assembly. The box body is provided with a feeding port through which the spent fuel assemblies are pushed into the box body. The fixed blade assembly is fixed inside the box body and is matched with the spent fuel assemblies to bear the spent fuel assemblies. The pressing assembly is movably arranged inside the box body and is correspondingly arranged on the two sides of the feeding port with the fixed blade assembly. The pressing assembly is movable relative to the fixed blade assembly and is used to press the spent fuel assemblies against the fixed blade assembly. The movable blade assembly is movably arranged inside the box body and is parallel to the fixed blade assembly. When the movable blade assembly moves towards the fixed blade assembly, the movable blade assembly cooperates with the fixed blade assembly to shear the spent fuel assemblies.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of spent fuel reprocessing technology, and specifically to a shearing device 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 the shearing process, the shearing device cuts the ends and fuel segments of the spent fuel assembly to disintegrate it, providing usable spent fuel fragments as feedstock for the subsequent chemical dissolution process. Summary of the Invention

[0003] Embodiments of the present invention provide a shearing device for spent fuel assemblies. The shearing device includes: a housing with an inlet, through which spent fuel assemblies are pushed into the housing; a fixed blade assembly fixed within the housing, the fixed blade assembly matching the shape of the spent fuel assembly for supporting the spent fuel assembly; a clamping assembly movably disposed within the housing, the clamping assembly and the fixed blade assembly correspondingly disposed on opposite sides of the inlet, the clamping assembly being movable relative to the fixed blade assembly for clamping the spent fuel assembly against the fixed blade assembly; and a movable blade assembly movably disposed within the housing, the movable blade assembly moving in a direction parallel to the moving direction of the clamping assembly, the movable blade assembly being parallel to the fixed blade assembly; wherein, when the movable blade assembly moves toward the fixed blade assembly, the movable blade assembly cooperates with the fixed blade assembly for shearing the spent fuel assembly.

[0004] In the shearing device of this invention, the fixed blade assembly matches the shape of the spent fuel assembly, and the spent fuel assembly is pressed into the fixed blade assembly by the clamping assembly, which prevents the spent fuel assembly from shifting during the shearing process. This facilitates the cooperation between the movable blade and the fixed blade to shear the spent fuel assembly, improves the safety and reliability of spent fuel assembly shearing, and also improves the processing efficiency of spent fuel assembly. 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 top view schematic diagram of a shearing device according to an embodiment of the present invention.

[0007] Figure 2 This is a cross-sectional view of a shearing device according to an embodiment of the present invention.

[0008] Figure 3 This is a schematic diagram of the structure of a fixed blade assembly according to an embodiment of the present invention.

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

[0010] Figure 5 yes Figure 4 A structural schematic diagram of the middle box from another perspective.

[0011] Figure 6 yes Figure 1 A cross-sectional view of the shearing device along the AA direction.

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

[0013] Figure 8 yes Figure 7 A structural schematic diagram of the central support section from another perspective.

[0014] Figure 9 This is a structural schematic diagram of the box and support part according to an embodiment of the present invention.

[0015] Figure 10 yes Figure 9 Another structural schematic diagram of the middle box and the support section.

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

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

[0018] Figure 13 This is a schematic diagram of the structure of a clamping assembly according to an embodiment of the present invention.

[0019] Figure 14 yes Figure 13 Another structural schematic diagram of the central clamping assembly.

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

[0021] Figure 16 yes Figure 15 A structural schematic diagram of the moving blade assembly from another perspective.

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

[0023] Figure 18 This is a schematic diagram of a shearing device according to an embodiment of the present invention.

[0024] 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

[0025] 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.

[0026] 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.

[0027] The inventors of this invention discovered that the blades used in traditional spent fuel assembly shearing machines are mostly straight, making it difficult to stably fix the spent fuel assembly between the fixed and movable blades for shearing. This is especially true for hexagonal spent fuel assemblies, which are encased in a hexagonal stainless steel sleeve, resulting in a complex structure. Currently, most blades in traditional shearing machines are unsuitable for shearing this type of spent fuel assembly.

[0028] Based on this, embodiments of the present invention provide a shearing device for spent fuel assemblies, used for shearing spent fuel assemblies. For example... Figure 1 and Figure 2As shown, the shearing device in this embodiment includes a housing 100, a fixed blade assembly 200, a clamping assembly 300, and a movable blade assembly 400. The housing 100 is provided with a feed inlet 121, through which spent fuel assemblies are pushed into the housing 100. The fixed blade assembly 200 is fixed within the housing 100, and its shape matches that of the spent fuel assembly, serving to support the spent fuel assembly. The clamping assembly 300 is movably disposed within the housing 100, corresponding to the fixed blade assembly 200 on both sides of the feed inlet 121. The clamping assembly 300 is movable relative to the fixed blade assembly 200, serving to clamp the spent fuel assembly against the fixed blade assembly 200. The movable blade assembly 400 is movably disposed within the housing 100, its movement direction parallel to that of the clamping assembly 300, and it is arranged parallel to the fixed blade assembly 200. When the movable blade assembly 400 moves toward the fixed blade assembly 200, the movable blade assembly 400 cooperates with the fixed blade assembly 200 to shear the spent fuel assembly.

[0029] In the shearing device of this embodiment, the fixed blade assembly 200 is matched with the shape of the spent fuel assembly, so that the fixed blade assembly 200 can carry the spent fuel assembly and the clamping assembly 300 can press the spent fuel assembly into the fixed blade assembly 200, thereby stably fixing the spent fuel assembly and preventing the spent fuel assembly from shifting during the shearing process. This facilitates the cooperation between the movable blade and the fixed blade 220 to shear the spent fuel assembly.

[0030] like Figure 2 As shown, the feed inlet 121 is located on the side of the housing 100, allowing the spent fuel assembly to be fed horizontally into the shearing device. In some embodiments, the feed inlet 121 matches the shape of the spent fuel assembly, and the spent fuel assembly moves along its axial direction and is fed into the housing 100 from the feed inlet 121. The clamping assembly 300 and the fixed blade assembly 200 are arranged horizontally on both sides of the feed inlet 121, and the moving direction of the clamping assembly 300 and the movable blade assembly 400 is perpendicular to the axial direction of the spent fuel assembly. This allows the spent fuel assembly to be clamped to the fixed blade assembly 200 by the clamping assembly 300 after it is fed into the housing 100, preventing displacement of the spent fuel assembly during the shearing process.

[0031] Furthermore, the fixed blade assembly 200 and the movable blade assembly 400 are arranged in parallel in the horizontal direction, and the movable blade assembly 400 is arranged on the side of the clamping assembly 300 away from the feed port 121. The blade edge of the movable blade assembly 400 is opposite to the blade edge of the fixed blade assembly 200, so that the spent fuel assembly can be sheared when the movable blade assembly 400 moves toward the fixed blade assembly 200.

[0032] The shearing device in this embodiment can perform horizontal shearing of spent fuel assemblies. Compared with traditional vertical shearing machines, it avoids arranging movable and fixed blades 220 in the vertical direction, and also avoids the possibility of uncut spent fuel assemblies falling during vertical feeding and shearing, thus improving the safety and reliability of spent fuel assembly shearing, and also improving the processing efficiency of spent fuel assemblies.

[0033] like Figure 3 As shown, in some embodiments, the fixed blade assembly 200 includes a fixed blade mounting portion 210 and a fixed blade 220. The fixed blade mounting portion 210 is fixed inside the housing 100, and the fixed blade 220 is mounted on the fixed blade mounting portion 210. The blade edge of the fixed blade 220 is provided with a first receiving groove 221 that matches the shape of the spent fuel assembly. The first receiving groove 221 is used to receive at least a portion of the spent fuel assembly.

[0034] In this embodiment, the fixed blade 220 is configured as a contour-following structure adapted to the spent fuel assembly, so that the contour of the spent fuel assembly can coincide with the cutting edge of the fixed blade 220. During shearing, the spent fuel assembly can be fixed to a certain extent, preventing displacement and ensuring the uniformity and stability of the force on the spent fuel assembly, thus facilitating shearing. At the same time, the fixed blade 220 remains in a fixed state during the shearing process and can withstand the combined shearing and clamping forces, thereby cooperating with the movable blade to achieve the shearing of the spent fuel assembly.

[0035] Specifically, when the spent fuel assembly is hexagonal, the first receiving groove 221 of the fixing blade 220 is trapezoidal, which is part of the hexagon to accommodate spent fuel assemblies of different sizes. Two adjacent faces of the hexagonal spent fuel assembly are in contact with the bottom and side surfaces of the first receiving groove 221. The clamping assembly 300 can also be tightly pressed against one face of the spent fuel assembly to press the spent fuel assembly into the first receiving groove 221, allowing the spent fuel assembly to be more stably pressed into the first receiving groove 221, further ensuring the uniformity and stability of the force.

[0036] In this embodiment, the first receiving groove 221 can accommodate hexagonal spent fuel assemblies of different sizes, thereby ensuring compatibility with spent fuel assemblies of different sizes and enabling shearing of spent fuel assemblies of different sizes. The first receiving groove 221 can accommodate spent fuel assemblies whose size matches that of the first receiving groove 221, such that three sides of the hexagonal spent fuel assembly completely coincide with the outline of the first receiving groove 221. Furthermore, the first receiving groove 221 can also accommodate multiple hexagonal spent fuel assemblies of different sizes smaller than the first receiving groove 221, in which case two sides of the hexagonal spent fuel assembly coincide with the outline of the first receiving groove 221, thus ensuring compatibility with spent fuel assemblies of different sizes.

[0037] In some embodiments, the fixed blade mounting portion 210 is provided with a fixed blade mounting groove 211, which matches the fixed blade 220. The fixed blade 220 is mounted in the fixed blade mounting groove 211, and the cutting edge of the fixed blade 220 is exposed outside the fixed blade mounting groove 211 to facilitate the fixed blade 220 to withstand shearing and clamping forces. Specifically, the fixed blade mounting groove 211 may be provided on one side of the fixed blade mounting portion 210.

[0038] Furthermore, the fixed blade mounting portion 210 is also provided with a second receiving groove 212 that matches the shape of the spent fuel assembly. The second receiving groove 212 is located on the same side of the fixed blade mounting portion 210 as the first receiving groove 221. The first receiving groove 221 and the second receiving groove 212 are used together to accommodate part of the spent fuel assembly, thereby making the spent fuel assembly more stably pressed into the fixed blade 220 and the fixed blade mounting portion 210.

[0039] like Figure 4 and Figure 5 As shown, in some embodiments, the housing 100 includes a main body 110 and a feed channel 120. A shearing chamber 111 is formed within the main body 110, and a fixed blade assembly 200, a clamping assembly 300, and a movable blade assembly 400 are disposed within the shearing chamber 111. The feed channel 120 protrudes from one side of the main body 110, and a feed inlet 121 is disposed at the end of the feed channel 120 away from the main body 110 and communicates with the shearing chamber 111. The spent fuel assembly enters the shearing chamber 111 via the feed channel 120.

[0040] Furthermore, a cover 112 is provided on the top of the main body 110. The cover 112 is sealed to the top of the main body 110 to seal the shearing chamber 111 and prevent dust from spreading to the outside of the shearing device. The bottom of the main body 110 is connected to the melter so that when shearing the fuel segments of the spent fuel assembly, the sheared fuel segments fall directly into the melter for dissolution, facilitating subsequent processing. In addition, an air inlet can be provided on the cover 112 to allow air to enter the shearing chamber 111, forming an airflow direction within the shearing chamber 111.

[0041] In some embodiments, the top of the feed channel 120 is provided with an opening, and a top cover 122 is detachably connected to the opening of the feed channel 120 to seal the feed channel 120. When needed, the top cover 122 can be removed, and a camera can be inserted into the feed channel 120 through the opening to observe the dust accumulation inside the feed channel 120. When necessary, the feed channel 120 can be blown and rinsed through the opening to remove accumulated dust and prevent dust from affecting the shearing process.

[0042] like Figure 4As shown, a fixed blade support portion 140 is provided inside the housing 100. The fixed blade support portion 140 is fixed inside the housing 100, and a fixed blade receiving groove 141 is provided on the fixed blade support portion 140. The fixed blade assembly 200 is installed in the fixed blade receiving groove 141. In some embodiments, the fixed blade support portion 140 is also provided with a spent fuel channel 142, which corresponds to the feed channel 120. The fixed blade receiving groove 141 is located on the side of the spent fuel channel 142 away from the clamping assembly 300. When the spent fuel assembly is pushed into the spent fuel channel 142, the fixed blade assembly 200 can carry the spent fuel assembly to facilitate shearing it.

[0043] like Figure 2 As shown, in some embodiments, the clamping assembly 300 includes a clamping drive, a clamping moving part 320, and a clamping part 330. The clamping drive is disposed outside the housing 100, and the clamping moving part 320 is disposed inside the housing 100. The clamping drive is connected to the clamping moving part 320 and drives the clamping moving part 320 to move. The clamping moving part 320 and the fixed blade assembly 200 are located on opposite sides of the feed inlet 121. The clamping part 330 is fixed to the end of the clamping moving part 320 away from the clamping drive and drives the clamping part 330 to move. The clamping part 330 is used to clamp the spent fuel assembly into the fixed blade assembly 200. For example, the clamping part 330 corresponds to the first receiving groove 221 of the fixed blade 220, so that the clamping part 330 can clamp the spent fuel assembly into the first receiving groove 221, thereby limiting the position of the spent fuel assembly.

[0044] In some embodiments, the clamping drive is a hydraulic cylinder. A first drive shaft 310 is connected between the clamping drive and the clamping moving part 320. The first drive shaft 310 is movably disposed on the side of the housing 100 and connected to the clamping moving part 320 inside the housing 100, thereby providing power for the movement of the clamping moving part 320.

[0045] like Figure 2 As shown, in some embodiments, the movable blade assembly 400 includes a movable blade drive unit, a movable blade mounting unit 420, and a movable blade 430. The movable blade drive unit is disposed outside the housing 100, and the movable blade mounting unit 420 is disposed inside the housing 100. The movable blade drive unit is connected to the movable blade mounting unit 420 and is used to drive the movable blade mounting unit 420 to move. The movable blade 430 is fixed to the movable blade mounting unit 420, and the movable blade mounting unit 420 drives the movable blade 430 to move. The movable blade 430 cooperates with the fixed blade 220 to shear the spent fuel assembly. The cutting edge of the movable blade 430 corresponds to the cutting edge of the fixed blade 220, thereby achieving the shearing of the spent fuel assembly.

[0046] In some embodiments, the movable blade drive unit is a hydraulic cylinder. A second drive shaft 410 is connected between the movable blade drive unit and the movable blade mounting part 420. The second drive shaft 410 is movably disposed on the side of the housing 100 and connected to the movable blade mounting part 420 inside the housing 100, thereby providing power for the movement of the movable blade mounting part 420.

[0047] Furthermore, the pressing moving part 320 and the movable knife mounting part 420 are arranged in parallel, and the first drive shaft 310 and the second drive shaft 410 are arranged side by side in parallel through the side of the housing 100 to drive the pressing moving part 320 and the movable knife mounting part 420 to move in the same moving direction.

[0048] In this embodiment, the clamping drive and the movable blade drive are located outside the housing 100 to prevent dust generated during shearing inside the housing 100 from contaminating the clamping drive and the movable blade drive, and also to prevent them from being exposed to nuclear radiation from spent fuel assemblies, thus ensuring their normal operation and improving the reliability of spent fuel assembly shearing.

[0049] like Figure 6 As shown, in some embodiments, the shearing device further includes a support portion 500, which is disposed inside the housing 100. The clamping assembly 300 and the movable blade assembly 400 are movably supported on the support portion 500, which supports the clamping moving part 320 and the movable blade mounting part 420.

[0050] like Figures 7 to 10 As shown, the support portion 500 in this embodiment is a frame structure. The support portion 500 is installed inside the housing 100, and the pressing moving portion 320 and the movable blade mounting portion 420 are movably installed inside the support portion 500. In some embodiments, a connection port 510 is provided on the side of the support portion 500, and the first drive shaft 310 and the second drive shaft 410 pass through the connection port 510 to connect with the pressing moving portion 320 and the movable blade mounting portion 420 inside the support portion 500.

[0051] In addition, a clearance opening 520 is provided at the position corresponding to the support part 500 and the fixed blade support part 140, so that the fixed blade support part 140 can be directly connected to the housing 100, thereby realizing the fixed installation of the fixed blade support part 140.

[0052] like Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the support portion 500 is provided with a first guide groove 530, which extends along the moving direction of the pressing assembly 300. For example... Figure 6 , Figure 13 and Figure 14As shown, the pressing moving part 320 is provided with a first rotating part 321, which is rotatably disposed within a first guide groove 530. The rotation axis of the first rotating part 321 extends along a first direction, and the first rotating part 321 is used to support the pressing moving part 320 in a second direction. The first direction is perpendicular to the moving direction of the pressing assembly 300 and the second direction. The first rotating part 321 matches the first guide groove 530. When the pressing driving part drives the pressing moving part 320 to move, the first rotating part 321 rotates within the first guide groove 530, causing the pressing moving part 320 to move along the first guide groove 530, thereby defining the moving direction of the pressing moving part 320. In this embodiment, the first direction can be a direction perpendicular to the support surface of the support part 500, that is, the first direction is a vertical direction, and the second direction is parallel to the support surface of the support part 500 and perpendicular to the moving direction of the pressing assembly 300.

[0053] In this embodiment, a first rotating part 321 is provided on the pressing moving part 320, so that the first rotating part 321 can roll in the first guide groove 530. This allows the pressing moving part 320 to move smoothly when the pressing moving part 320 is driven, reducing the friction between the pressing moving part 320 and the support part 500 and improving work efficiency.

[0054] like Figures 6 to 8 As shown, the first guide groove 530 is disposed at the bottom of the support part 500, and the bottom surface of the pressing moving part 320 is provided with a first rotating part 321. The first rotating part 321 is rotatably disposed in the first guide groove 530, thereby supporting the pressing moving part 320.

[0055] like Figures 7 to 8 As shown, the first guide groove 530 is located on the side of the feed inlet 121 away from the fixed blade assembly 200, so that the pressing moving part 320 and the fixed blade assembly 200 are respectively located on both sides of the feed inlet 121, thereby achieving the pressing of the spent fuel assembly entering from the feed inlet 121, and also preventing the pressing moving part 320 from moving to the feed inlet 121 and affecting the feeding of the spent fuel assembly.

[0056] like Figure 6 As shown, in some embodiments, the shearing device further includes a movable guide rail 600, which is supported on the support portion 500, and the clamping component 300 is movably disposed between the movable guide rail 600 and the support portion 500. The movable guide rail 600 is used to define the moving direction of the clamping component 300. In this embodiment, the movable guide rail 600 and the support portion 500 together constitute the moving track of the clamping moving portion 320 to define the moving direction of the clamping moving portion 320.

[0057] In some embodiments, the support portion 500 has a mounting groove 540 on its side, and the movable guide rail 600 has a corresponding mounting limiting block 610. The mounting limiting block 610 matches the mounting groove 540 and is positioned within the mounting groove 540, thereby supporting the movable guide rail 600 on the support portion 500. For example, the mounting limiting block 610 can be an inverted L-shaped limiting block protruding from the side of the movable guide rail 600. The inverted L-shaped limiting block can be accommodated within the mounting groove 540 to stably support the movable guide rail 600 on the support portion 500.

[0058] like Figure 6 , Figure 11 and Figure 12 As shown, in some embodiments, the movable guide rail 600 is provided with a second guide groove 620, which is correspondingly disposed on both sides of the pressing movable part 320 with respect to the first guide groove 530. A plurality of first rotating parts 321 are correspondingly disposed on both sides of the pressing movable part 320. The first rotating parts 321 on both sides of the pressing movable part 320 are rotatably positioned within the first guide groove 530 and the second guide groove 620, respectively, thereby guiding the pressing movable part 320 to move between the movable guide rail 600 and the support part 500. For example, the second guide groove 620 is disposed at the bottom of the movable guide rail 600, the first guide groove 530 and the second guide groove 620 are respectively located below and above the pressing movable part 320, and the first rotating parts 321 are respectively disposed at the bottom and top of the pressing movable part 320.

[0059] In addition, the movable guide rail 600 is located on the side of the feed inlet 121 away from the fixed blade assembly 200 to prevent the movable guide rail 600 from affecting the setting of the fixed blade assembly 200. At the same time, it can make the second guide groove 620 correspond to the first guide groove 530 to guide and limit the pressing moving part 320.

[0060] In some embodiments, the first rotating parts 321 are correspondingly disposed on both sides of the pressing moving part 320, and the connecting shaft is connected between the two first rotating parts 321 correspondingly disposed on both sides of the pressing moving part 320, so that the two corresponding first rotating parts 321 rotate together. For example, the pressing moving part 320 may be provided with four first rotating parts 321, of which two first rotating parts 321 are disposed at the bottom of the pressing moving part 320, and the other two first rotating parts 321 are correspondingly disposed at the top of the pressing moving part 320.

[0061] like Figure 13 and Figure 14As shown, in some embodiments, the pressing moving part 320 is further provided with a second rotating part 322, the rotation axis of the second rotating part 322 extending along a second direction, and the second rotating part 322 is used to support the pressing moving part 320 in a first direction. For example, a plurality of second rotating parts 322 are provided at the top and bottom of the pressing moving part 320, thereby supporting the pressing moving part 320 in the vertical direction.

[0062] In this embodiment, a second rotating part 322 is provided on the pressing moving part 320. The second rotating part 322 and the first rotating part 321 support the pressing moving part 320 to move along the axial direction perpendicular to the spent fuel assembly in different directions.

[0063] like Figure 13 and Figure 14 As shown, in some embodiments, the pressing moving part 320 is provided with a rotating part mounting groove 323, and the second rotating part 322 is rotatably mounted in the rotating part mounting groove 323, and the second rotating part 322 partially protrudes out of the rotating part mounting groove 323 so that the second rotating part 322 can support the pressing moving part 320.

[0064] In some embodiments, the rotating part mounting groove 323 is located on both sides of the first rotating part 321, such that the second rotating part 322 is arranged on both sides of the first rotating part 321. For example, four second rotating parts 322 are respectively provided on the top and bottom of the pressing moving part 320, and the four rotating parts are symmetrically arranged on both sides of the two first rotating parts 321.

[0065] like Figure 13 and 14 As shown, the pressing moving part 320 is also provided with a transmission connection part 324, which is connected to the first transmission shaft 310 so that the first transmission shaft 310 can drive the pressing moving part 320 to move. For example, the transmission connection part 324 is provided on the side of the pressing moving part 320 away from the pressing part 330. The transmission connection part 324 includes a groove 3241 and a positioning pin 3242. The first transmission shaft 310 is connected in the groove 3241. The positioning pin 3242 is perpendicular to the axial direction of the first transmission shaft 310 and passes through the side wall of the first transmission shaft 310 and the groove 3241, thereby connecting the first transmission shaft 310 and the pressing moving part 320 and preventing relative displacement between the first transmission shaft 310 and the pressing moving part 320 during movement.

[0066] like Figure 6 As shown, in some embodiments, the movable blade mounting portion 420 is movably disposed between the support portion 500 and the clamping assembly 300, and the movable guide rail 600 and the support portion 500 are used to support the movable blade mounting portion 420. Specifically, as Figure 2As shown, the movable blade mounting part 420 is disposed on the side of the clamping moving part 320, the moving guide rail 600 and the fixed blade assembly 200 away from the feed port 121, and the clamping moving part 320, the moving guide rail 600 and the movable blade mounting part 420 are limited between two opposite side walls of the support part 500 to prevent the clamping moving part 320 and the movable blade mounting part 420 from being displaced in the second direction during the shearing process.

[0067] In addition, the pressing moving part 320, the movable blade mounting part 420, the support part 500, the moving guide rail 600 and the fixed blade assembly 200 are defined between the bottom of the housing 100 and the cover 112. The cover 112 can define the position of these components in the vertical direction and prevent these components from being displaced in the vertical direction.

[0068] like Figure 6 and Figure 11 As shown, in some embodiments, a rotating part 630 is provided on the side of the movable guide rail 600 facing the movable blade mounting part 420, and a rotating part 630 is also provided on the side of the support part 500 opposite to the feed port 121. The rotating parts 630 are correspondingly arranged on both sides of the movable blade mounting part 420, and the rotation axis of the rotating parts 630 extends along the second direction. The movable blade mounting part 420 is movably suspended on the rotating parts 630, thereby supporting the movable blade mounting part 420 between the side walls of the movable guide rail 600 and the support part 500. When the movable blade mounting part 420 is driven to move, the rotating part 630 is driven to rotate, thereby reducing the friction between the movable blade mounting part 420 and the movable guide rail 600 and the support part 500.

[0069] In some embodiments, the movable guide rail 600 is provided with a plurality of rotating parts 630 on the side facing the movable blade mounting part 420. The plurality of rotating parts 630 are evenly arranged along the moving direction of the movable blade mounting part 420 to support the movable blade mounting part 420 as it moves along the moving direction.

[0070] In addition, such as Figure 7 and Figure 9 As shown, the support portion 500 is provided with a rotating mounting portion 550, which is connected to the side wall of the support portion 500. It is located on the side of the feed inlet 121 away from the clamping assembly 300 and above the fixed blade assembly 200. Multiple rotating portions 630 are evenly arranged on the rotating mounting portion 550 and are aligned with multiple rotating portions 630 on the moving guide rail 600, so that the rotating portions 630 on the rotating mounting portion 550 and the rotating portions 630 on the moving guide rail 600 together support the movable blade mounting portion 420.

[0071] like Figure 8 and Figure 10As shown, in some embodiments, the side of the support 500 opposite to the feed port 121 is provided with a plurality of rotating parts 630, and the plurality of rotating parts 630 are evenly arranged along the moving direction of the movable blade mounting part 420, so as to stably support the movable blade mounting part 420 together with the rotating parts 630 on the moving guide rail 600.

[0072] like Figure 6 , Figure 15 and Figure 16 As shown, the side of the movable guide rail 600 is provided with a recess 640, and the side of the support portion 500 is also provided with a recess 560. Multiple rotating portions 630 are rotatably mounted within the recesses 640 and 560. The movable blade mounting portion 420 is provided with a protrusion 421, which extends from the top of the movable blade mounting portion 420 to both sides. The protrusion 421 is supported on the multiple rotating portions 630, thereby suspending the movable blade mounting portion 420 on the multiple rotating portions 630. In this embodiment, by supporting the protrusion 421 on the rotating portions 630 in the recesses, the two sides of the movable blade mounting portion 420 contact the pressing moving portion 320 and the support portion 500 respectively, preventing the distance between the two sides of the movable blade mounting portion 420 and the pressing moving portion 320 and the support portion 500 from being too large, which would cause the movable blade mounting portion 420 to shift in the second direction.

[0073] like Figure 15 and Figure 16 As shown, in some embodiments, third rotating portions 422 are provided on both sides of the movable blade mounting portion 420. The third rotating portions 422 are rotatably arranged on both sides of the movable blade 430. The rotation axis of the third rotating portions 422 extends along a first direction. The third rotating portions 422 are used to support the movement of the movable blade mounting portion 420 in a second direction, reducing the friction between the movable blade mounting portion 420 and the support portion 500 and the moving guide rail 600 during the movement. The first direction is perpendicular to the bottom surface of the support portion 500, i.e., the first direction is vertical. The second direction is perpendicular to the side surface of the movable mounting portion, i.e., the second direction is the axial direction of the spent fuel assembly during the shearing process.

[0074] In some embodiments, the third rotating part 422 is disposed on two opposite sides of the movable blade mounting part 420, and the third rotating part 422 is located below the rotating part 630, so that when the movable blade mounting part 420 moves, the third rotating part 422 can roll relative to the side of the moving guide rail 600 and the side of the support part 500, thereby avoiding mutual interference between the rotating part 630 and the third rotating part 422.

[0075] Furthermore, the movable blade mounting part 420 is provided with a rotating part mounting groove 423. The rotating part mounting groove 423 is provided on the side of the movable blade mounting part 420. The third rotating part 422 is rotatably mounted in the rotating part mounting groove 423 and partially protrudes from the rotating part mounting groove 423 so that it can contact the side of the support part 500 or the moving guide rail 600, thereby supporting the movement of the movable blade mounting part 420.

[0076] like Figure 15 and Figure 16 As shown, in some embodiments, the movable blade mounting portion 420 is further provided with a receiving channel 424, which is disposed on one side of the movable blade 430. The cutting edge of the movable blade 430 is exposed in the receiving channel 424, which is used to receive spent fuel assemblies during shearing. For example, the receiving channel 424 may be disposed in the middle of the movable blade mounting portion 420, with the movable blade 430 disposed on one side of the receiving channel 424.

[0077] Before the spent fuel assembly is fed, the position of the receiving channel 424 corresponds to the position of the feed port 121, so that the spent fuel assembly is pushed sequentially into the feed channel 120, the first receiving groove 221 of the fixed blade 220, and the receiving channel 424 of the movable blade mounting part 420; then, the pressing moving part 320 is driven to move the pressing part 330 toward the fixed blade assembly 200 to press the spent fuel assembly; next, the movable blade mounting part 420 is driven to move the movable blade 430 toward the fixed blade 220 to cut the spent fuel assembly, and the end or fuel segment contained in the receiving channel 424 of the movable blade mounting part 420 is cut off.

[0078] Furthermore, the third rotating part 422 is disposed on both sides of the movable blade 430, that is, on both sides of the receiving channel 424, to stably support the movement of the movable blade mounting part 420. In addition, since the movable blade 430 corresponds to the fixed blade 220 and the clamping part 330, the third rotating part 422 in this embodiment is disposed above or below the movable blade 430 to avoid the third rotating part 422 contacting the clamping part 330 and the fixed blade 220 during movement, thus affecting the clamping and shearing of the spent fuel assembly.

[0079] For example, eight third rotating parts 422 are disposed on both sides of the movable blade mounting part 420 along the axial direction of the spent fuel assembly. Four third rotating parts 422 can be disposed on each side. The four third rotating parts 422 are arranged in pairs, corresponding to both sides of the receiving channel 424, and the two third rotating parts 422 in each pair are correspondingly disposed above and below the movable blade 430. In addition, a connecting shaft connects the two third rotating parts 422 in each pair, so that the corresponding two third rotating parts 422 rotate together.

[0080] like Figure 15 and Figure 16 As shown, in some embodiments, the movable blade mounting portion 420 is further provided with a fourth rotating portion 425. The rotation axis of the fourth rotating portion 425 extends along a second direction, and the fourth rotating portion 425 is used to support the movable blade mounting portion 420 in the second direction. For example, the fourth rotating portion 425 is disposed at the top of the movable blade mounting portion 420, and the fourth rotating portion 425 rotates about a rotation axis perpendicular to the side of the movable blade mounting portion 420, thereby supporting the movable blade mounting portion 420 in the vertical direction. In addition, the position of the fourth rotating portion 425 can correspond to the position of the movable blade 430, that is, the fourth rotating portion 425 is disposed at the middle position of the movable blade mounting portion 420 to stably support the movable blade mounting portion 420.

[0081] In some embodiments, the top surface of the movable knife mounting part 420 is provided with a rotating part mounting groove 427, and the fourth rotating part 425 is mounted in the rotating part mounting groove 427 and partially protrudes from the rotating part mounting groove 427, so that the fourth rotating part can contact the cover 112 of the housing 100 to support the movable knife mounting part 420 in the vertical direction.

[0082] In this embodiment, a fourth rotating part 425 is provided on the movable knife mounting part 420. The fourth rotating part 425 and the third rotating part 422 support the movable knife mounting part 420 in different directions, so that it can move along the axial direction perpendicular to the spent fuel assembly.

[0083] In embodiments of the present invention, the first rotating part 321, the second rotating part 322, the third rotating part 422, and the fourth rotating part 425 may be rollers. The rotating part 630 may also be a roller.

[0084] like Figure 15 and 16 As shown, the movable blade mounting portion 420 is also provided with a transmission connection portion 426, which is connected to the second transmission shaft 410 so that the second transmission shaft 410 can drive the movable blade mounting portion 420 to move. For example, the transmission connection portion 426 is located on the side of the movable blade mounting portion 420 opposite to the cutting edge of the movable blade 430. The transmission connection portion 426 includes a groove 4261 and a positioning pin 4262. The second transmission shaft 410 is connected within the groove 4261. The positioning pin 4262 is perpendicular to the axial direction of the second transmission shaft 410 and passes through the sidewalls of the second transmission shaft 410 and the groove 4261, thereby connecting the second transmission shaft 410 to the movable blade mounting portion 420 and preventing relative displacement between the second transmission shaft 410 and the movable blade mounting portion 420 during movement.

[0085] In some embodiments, the blade of the movable blade 430 is straight. That is, the movable blade 430 in this embodiment is a flat blade, which allows for the complete shearing of the spent fuel assembly without breaking the outer casing, thereby improving the shearing efficiency of the hexagonal spent fuel assembly.

[0086] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the housing 100 also includes an end-receiving channel 130, which protrudes from the main body 110 on the side away from the feed channel 120. The end-receiving channel 130 corresponds to the feed channel 120 and is used to receive the ends of spent fuel assemblies during shearing. After the fuel section of the spent fuel assembly has been sheared, the remaining ends can be pushed into the end-receiving channel 130 to prevent the ends from remaining in the shearing chamber 111 and becoming difficult to collect.

[0087] like Figure 2 , Figure 7 and Figure 8 As shown, the support part 500 is provided with a channel connection port 570. The position of the channel connection port 570 corresponds to the end receiving channel 130 and the feed port 121, so that the end fed into the shearing chamber 111 can enter the end receiving channel 130 through the channel connection port 570.

[0088] In some embodiments, the bottom of the end receiving channel 130 is connected to an external end receiving container. For example... Figure 2 and Figure 5 As shown, the shearing device also includes an end support assembly 700 and an end push-down assembly 800. The end support assembly 700 is partially disposed in the end receiving channel 130. The end support assembly 700 is used to support the end, and the end push-down assembly 800 is used to push the end supported on the end support assembly 700 into the end receiving container, thereby realizing the collection of the end.

[0089] like Figure 2 and Figure 17 As shown, in some embodiments, the end support assembly 700 includes a plurality of support seats 710 and a mounting plate 720. The plurality of support seats 710 are arranged along the axial direction of the spent fuel assembly, and the mounting plate 720 is connected to the side of the end receiving channel 130. The plurality of support seats 710 are spaced apart and mounted on the mounting plate 720, and the end is supported on the plurality of support seats 710. In this embodiment, by providing a plurality of spaced support seats to support the end, the end support assembly can be made lightweight, allowing it to be stably fixed to the side of the end receiving channel, thereby improving structural strength.

[0090] In some embodiments, the support surface portion of the support base 710 near the feed inlet 121 is inclined to facilitate pushing the end tip onto the support base 710. Specifically, the support surface of the support base 710 includes a first support surface 711 and a second support surface 712. The first support surface 711 is inclined, and the second support surface 712 is horizontal and higher than the first support surface 711. When the end tip loses the support of the fixing blade assembly 200, it may tilt downwards due to its own weight. The inclined portion of the support surface can prevent the end tip from being unable to be pushed onto the support base 710.

[0091] like Figure 1 As shown, in some embodiments, the end-pushing assembly 800 includes a pushing-down drive unit 810 and a pushing-down part 820. The pushing-down drive unit 810 is disposed outside the housing 100, and the pushing-down part 820 is connected to the pushing-down drive unit 810 and extends into the end-receiving channel 130. The pushing-down drive unit 810 drives the pushing-down part 820 to move in a direction perpendicular to the end, and the pushing-down part 820 pushes the end to move so that the end falls from the end-support assembly 700 to the end-receiving container, thereby realizing the horizontal pushing and receiving of the end. For example, the pushing-down drive unit can be a cylinder, and the pushing-down part can be an output shaft.

[0092] like Figure 18 As shown, in some embodiments, the shearing device further includes a camera assembly 900. The housing 100 is provided with a mounting hole 132, which communicates with the shearing chamber 111 inside the housing 100. The camera assembly 900 is installed in the mounting hole 132 to observe the shearing process of the spent fuel assembly inside the housing 100. For example, the end-receiving channel 130 has a mounting hole 132 on its side, and the camera assembly 900 extends from the side of the end-receiving channel 130 into the housing 100 to observe the shearing process inside the housing 100.

[0093] In addition, the top of the end receiving channel 130 is provided with an opening, and the top cover 131 is detachably and sealingly connected to the opening. When the top cover 131 is removed, the dust accumulation inside the end receiving channel 130 can be observed through the opening at the top of the end receiving channel 130. When necessary, the end receiving channel 130 can be blown and rinsed through this opening to remove the accumulated dust.

[0094] The shearing device in this embodiment of the invention can achieve horizontal feeding and horizontal shearing of spent fuel assemblies. Specifically, the shearing device can sequentially shear the first end, fuel segment, and second end of the spent fuel assembly.

[0095] When using the shearing device in this embodiment, the spent fuel assembly is pushed to a designated position within the shearing device, such that the connection between the first end of the spent fuel assembly and the fuel segment is located between the movable blade 430 and the fixed blade 220. The clamping drive unit drives the clamping moving part 320 to move towards the fixed blade assembly 200 in the motion track formed by the moving guide rail 600 and the support part 500, clamping the spent fuel assembly into the first receiving groove 221 of the fixed blade 220. Next, the movable blade drive unit drives the movable blade mounting part 420 to move towards the fixed blade 220, so that the movable blade 430 cuts the spent fuel assembly, and the cut first end falls into the end receiving container below the shearing device.

[0096] After the first end is sheared, the clamping drive unit drives the clamping moving part 320 to return to its initial position, and the movable blade drive unit drives the movable blade mounting part 420 to return to its initial position. The end receiving container containing the first end then returns to its initial position. Next, the spent fuel assembly is pushed to a predetermined length to shear the fuel segments of the spent fuel assembly. The sheared fuel segments are then placed into a melter connected below the shearing device. The shearing process for the fuel segments is the same as that for the first end and will not be described again here.

[0097] Once the fuel section shearing is completed, the final shearing of the spent fuel assembly is finished. At this point, the drive end receiving container is moved to the receiving position, and the remaining second end of the spent fuel assembly is pushed onto the end support assembly 700. The end push-down assembly 800 pushes the second end into the end receiving container below the shearing device, and finally the end push-down assembly 800 returns to its initial position.

[0098] It should be noted that the shearing device is sealed to the external end receiving device at the bottom. The bottom of the end receiving device is equipped with a chute, the position of which corresponds to the position of the shearing device. The chute is used to connect to the melter. An end receiving container is installed inside the end receiving device. The end receiving container can move within the end receiving device and has an initial station and a receiving station. The receiving station is located above the chute, and the initial station is away from the chute and the shearing device.

[0099] When the end receiving container is in the receiving position, the chute can be blocked, and the first end cut by the shearing device and the second end pushed down by the end pushing component 800 can fall into the end receiving container; when the end receiving container returns to the initial position, the end receiving container avoids the chute, and the fuel segment cut by the shearing device can fall into the chute and into the dissolver, thereby realizing the classified collection and processing of the end and fuel segment.

[0100] 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.

[0101] 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 shearing device for spent fuel assemblies, characterized in that, include: The housing is provided with a feed inlet, through which the spent fuel assembly is pushed into the housing; A blade fixing assembly is fixed inside the housing and its shape matches that of the spent fuel assembly for supporting the spent fuel assembly. A clamping assembly is movably disposed within the housing. The clamping assembly and the fixed blade assembly are correspondingly disposed on both sides of the feed inlet. The clamping assembly is movable relative to the fixed blade assembly and is used to clamp the spent fuel assembly against the fixed blade assembly. A movable blade assembly is movably disposed within the housing, the moving direction of the movable blade assembly is parallel to the moving direction of the clamping assembly, and the movable blade assembly is arranged parallel to the fixed blade assembly; When the movable blade assembly moves toward the fixed blade assembly, the movable blade assembly cooperates with the fixed blade assembly to cut the spent fuel assembly; The box includes a main body and a feeding channel, the feeding channel being protruding from one side of the main body; The top of the main body is provided with a cover, which is sealed to the top of the main body to seal the shearing chamber and prevent dust from spreading to the outside of the shearing device. The bottom of the main body is connected to the dissolver so that when the fuel segments of the spent fuel assembly are sheared, the sheared fuel segments fall directly into the dissolver for dissolution, which facilitates subsequent processing. The enclosure also includes: An end receiving channel is provided on the other side of the main body, and the end receiving channel is corresponding to the feed channel. The end receiving channel is used to receive the end of the spent fuel assembly during shearing. The bottom of the end receiving channel is connected to an external end receiving container; The device further includes: An end support assembly is provided, wherein the end support assembly is partially disposed in the end receiving channel, and the end support assembly is used to support the end; An end-pushing assembly is used to push an end supported on the end-support assembly into the end-receiving container. A support portion is disposed inside the housing, and the clamping assembly and the movable blade assembly are movably supported on the support portion; A movable guide rail is supported on the support portion, and the clamping component is movably disposed between the movable guide rail and the support portion. The movable guide rail is used to limit the moving direction of the clamping component. The clamping assembly includes: A clamping drive unit is disposed outside the housing. A pressing movable part is disposed inside the housing; The movable blade assembly includes: A movable blade mounting part is disposed inside the housing; A movable blade is fixed to the movable blade mounting part, and the movable blade cooperates with the fixed blade assembly to cut the spent fuel assembly; The support portion is provided with a first guide groove, which extends along the moving direction of the clamping assembly; The pressing moving part of the pressing assembly is provided with a first rotating part, which is rotatably disposed in the first guide groove. The rotation axis of the first rotating part extends along a first direction, and the first rotating part is used to support the pressing moving part in a second direction. The first direction is perpendicular to the moving direction of the pressing assembly and the second direction. Wherein, the first rotating part matches the first guide groove, and when the pressing drive part of the pressing assembly drives the pressing moving part to move, the first rotating part rotates in the first guide groove, causing the pressing moving part to move along the first guide groove; The movable guide rail is provided with a second guide groove, which is provided on both sides of the pressing movable part in a corresponding manner to the first guide groove; Multiple first rotating parts are correspondingly disposed on both sides of the pressing moving part, and the first rotating parts on both sides of the pressing moving part are rotatably positioned in the first guide groove and the second guide groove, respectively; The pressing moving part is further provided with a second rotating part, the rotation axis of the second rotating part extends along the second direction, and the second rotating part is used to support the pressing moving part in the first direction; The pressing moving part is provided with a rotating part mounting groove, and the second rotating part is rotatably mounted in the rotating part mounting groove; The movable blade mounting part is provided with a third rotating part on both sides. The third rotating part is rotatably arranged on both sides of the movable blade. The rotation axis of the third rotating part extends along a first direction. The third rotating part is used to support the movable blade mounting part in a second direction. The movable blade mounting part is further provided with a fourth rotating part, the rotation axis of the fourth rotating part extends along the second direction, and the fourth rotating part is used to support the movable blade mounting part in the second direction.

2. The apparatus according to claim 1, characterized in that, The fixed blade assembly includes: A fixed blade mounting part is fixed inside the housing; A fixing blade is mounted on the fixing blade mounting part. The blade edge of the fixing blade is provided with a first receiving groove that matches the shape of the spent fuel assembly. The first receiving groove is used to receive at least a portion of the spent fuel assembly.

3. The apparatus according to claim 1, characterized in that, The clamping assembly also includes: The pressing moving part and the fixed knife assembly are located on both sides of the feed port. The pressing driving part is connected to the pressing moving part and is used to drive the pressing moving part to move. A clamping part is fixed to one end of the clamping moving part away from the clamping driving part. The clamping moving part is used to drive the clamping part to move and to clamp the spent fuel assembly into the fixed blade assembly.

4. The apparatus according to claim 1, characterized in that, The movable blade assembly also includes: A movable blade drive unit is disposed outside the housing; The movable blade driving unit is connected to the movable blade mounting unit, and the movable blade driving unit is used to drive the movable blade mounting unit to move.

5. The apparatus according to claim 1, characterized in that, The movable blade mounting part is movably disposed between the support part and the clamping assembly, and the movable guide rail and the support part are used to support the movable blade mounting part of the movable blade assembly.

6. The apparatus according to claim 5, characterized in that, The movable guide rail is provided with a rotating part on the side facing the movable blade mounting part, and the support part is also provided with the rotating part on the side opposite to the feed port. The rotating parts are correspondingly arranged on both sides of the movable blade mounting part, and the rotation axis of the rotating parts extends along the second direction. The movable blade mounting part is movably suspended on the rotating parts.

7. The apparatus according to claim 4, characterized in that, The movable blade mounting part is also provided with a receiving channel, which is located on one side of the movable blade, and the blade edge of the movable blade is exposed in the receiving channel. The receiving channel is used to receive the spent fuel assembly during shearing.

8. The apparatus according to claim 1, characterized in that, A shearing chamber is formed within the main body, and the fixed blade assembly, the clamping assembly, and the movable blade assembly are disposed within the shearing chamber. The feed inlet is located at the end of the feed channel away from the main body, and the spent fuel assembly enters the shear chamber through the feed channel.

9. The apparatus according to claim 1, characterized in that, The end support assembly includes: Multiple support bases are provided, and the end head is supported on the multiple support bases; wherein, the support surface of the support base near the feed port is inclined to facilitate pushing the end head onto the support base.

10. The apparatus according to claim 1, characterized in that, The end-pushing component includes: A push-down drive unit is disposed outside the housing; A push-down portion is connected to the push-down drive portion and extends into the end receiving channel. The push-down drive portion is used to drive the push-down portion to move in a direction perpendicular to the end. The push-down portion pushes the end to move so that the end falls from the end support assembly into the end receiving container.

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