Spent fuel rod bundle disassembly device and disassembly method

Abstract

The invention relates to a disassembly device and method for a spent fuel rod bundle, and the disassembly device comprises a workbench, a fixed chuck which is fixedly installed on the workbench and is used for fixing a first end of a spent fuel rod, an outer sleeve which is arranged above the fixed chuck and is used for cutting the spent fuel rod bundle, and a cutting mechanism which is used for cutting the spent fuel rod bundle, the first chuck and the second chuck can move along the workbench and are used for carrying an outer sleeve of a spent fuel rod, so that the outer sleeve is separated from a spent fuel rod bundle; the supporting fixture is connected to the workbench in a lifting manner and is used for supporting the outer sleeve and the spent fuel rod bundle in preset time; the clamping mechanism is used for carrying the spent fuel rod bundles to the transfer platform, then carrying the spent fuel rod bundles to the conveying line in a layered mode and placing the spent fuel rod bundles in a single-layer rod arrangement form, the structure is simple, the automation degree is high, a traditional manual arrangement mode can be effectively replaced for treating the spent fuel rods, and the working efficiency is improved. The safety in the operation process is ensured; the spent fuel rod bundles which are complexly stacked can be efficiently disassembled, and the disassembling efficiency is remarkably improved; the spent fuel rods which are originally tightly stacked can be ingeniously placed in a uniform single-layer rod arrangement form, and the subsequent treatment process is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of spent fuel rod disintegration, and in particular to a spent fuel rod bundle disintegration device and a spent fuel rod bundle disintegration method. Background Art

[0002] Currently, the single spent fuel rod known is in the shape of a long cylindrical rod. Due to its long length and weak overall rigidity, it is easy to bend and deform under its own gravity. Therefore, in a reactor, multiple spent fuel rods are usually stacked together and fixed into a bundle by an outer sleeve.

[0003] Spent fuel rods, also known as irradiated nuclear fuel, are nuclear fuel that has undergone a nuclear reaction in a reactor after neutron bombardment and is unloaded from the reactor after a certain period of time. It contains a large amount of unspent fertile materials (such as 238U or 232Th), unburned and newly generated fissile materials (such as 239Pu, 235U or 233U), and transuranic elements (such as neptunium, americium, curium, etc.) produced during the irradiation process of nuclear fuel. These elements will release a large amount of heat and radioactivity during the decay process.

[0004] In the prior art, the handling process of spent fuel rods after they are unloaded from the reactor is quite challenging. This task is usually performed by a manually controlled precision manipulator, which is responsible for taking out the dense rod bundles from the reactor structure one by one, and placing and arranging them in a specific area in an orderly manner according to the established safety and technical requirements, and then sending them to the subsequent processing interface for processing. However, in this process, the spent fuel rods often present a scattered and disordered state after being separated from the outer sleeve. This state of spent fuel rods not only increases the difficulty of operation, but also means that the staff needs to carefully take out and accurately place each spent fuel rod separately. This process not only has a complicated and cumbersome operation process, but also places extremely high demands on the professional skills, patience and meticulousness of the operator; in addition, since the entire operation process is highly dependent on manual control, it is not only inefficient, but also greatly increases the risk of human errors, which may cause damage to the spent fuel rods, improper handling or safety hazards, and thus pose a threat to the environment and personnel safety. Therefore, the existing spent fuel rod processing method is not only time-consuming and labor-intensive, but also has certain limitations in terms of safety and reliability.

[0005] In view of the above situation, there is an urgent need in the art to propose a spent fuel bundle dismantling device with a high degree of automation, better safety and higher efficiency to improve the above defects. Summary of the invention

[0006] Based on this, in order to solve the above problems, the present invention provides a spent fuel bundle dismantling device and method, which have high automation and good safety and can effectively improve the dismantling efficiency of spent fuel bundles.

[0007] To achieve the above-mentioned object, the present invention provides a device for dismantling a spent fuel rod bundle, comprising a workbench, a fixed chuck fixedly mounted on the workbench, the fixed chuck being used to fix the first end of the spent fuel rod, a cutting mechanism being arranged above the fixed chuck, the cutting mechanism being used to cut the outer sleeve of the spent fuel rod bundle and the spent fuel rod bundle, thereby separating the outer sleeve and the spent fuel rod bundle from the fixed chuck; further comprising a first chuck and a second chuck movable along the workbench, the first chuck and the second chuck being used to carry the outer sleeve of the spent fuel rod so as to separate the outer sleeve from the spent fuel rod bundle; further comprising a supporting fixture connected to the workbench by lifting and lowering, for Provide support to the outer sleeve and the spent fuel rod bundle at a preset time; also include a clamping mechanism, which can move along the vertical direction of the workbench, and is used to first transport the spent fuel rod bundle to the transfer platform and then transport the spent fuel rod bundle to the conveyor line in layers, and arrange the spent fuel rod bundle into a single-layer rod arrangement. The clamping mechanism includes a fixed first gripper and a movable second gripper, the first gripper is used to move to the top of the spent fuel rod bundle to grab the first end of the n-th layer of spent fuel rod bundle and lift the first end to form a gap, the second gripper is used to grab the n-th layer of spent fuel rod bundle from the gap and move to the second end of the n-th layer of spent fuel rod bundle, n≥1.

[0008] In one of the embodiments, the first chuck, the second chuck and the fixed chuck are respectively provided with a first rotating clamping head, a second rotating clamping head and a third rotating clamping head, the first rotating clamping head is provided with a first rotating disk, and the first rotating disk is provided with four first telescopic clamps; the second rotating clamping head is provided with a second rotating disk, and the second rotating disk is provided with four second telescopic clamps; the third rotating clamping head is provided with a third rotating disk, and the third rotating disk is provided with four third telescopic clamps, and the first telescopic clamp, the second telescopic clamp and the third telescopic clamp can clamp the outer sleeve or the spent fuel rod bundle when extended, and the motor controls the first rotating disk, the second rotating disk and the third rotating disk to rotate and drive the outer sleeve or the spent fuel rod bundle to rotate under the cutting mechanism, and the first telescopic clamp, the second telescopic clamp and the third telescopic clamp are retracted to release the outer sleeve or the spent fuel rod bundle.

[0009] In one of the embodiments, the transfer platform includes a restraining fixture and a supporting fixture, wherein the restraining fixture is operable to fix or release the first end of the spent fuel rod bundle, and the supporting fixture is used to provide support for the free end of the spent fuel rod bundle.

[0010] In one of the embodiments, the first gripper is connected to a first cylinder, which is used to control the size of the opening of the first gripper so that the opening of the first gripper matches the first end of each layer of spent fuel rod bundles; the second gripper is connected to a second cylinder, which is used to control the size of the opening of the second gripper so that the opening of the second gripper matches the second end of each layer of spent fuel rods; the second gripper is further connected to a third cylinder, which is used to control the second gripper to move toward or away from the first gripper, and the first gripper, the second gripper, the first cylinder, the second cylinder, and the third cylinder are all arranged on the bottom plate of the clamping mechanism.

[0011] In one of the embodiments, the clamping mechanism is also connected to a three-axis moving system, which is used to control the clamping mechanism to move to the top of the workbench to clamp the spent fuel rod bundle and then move the spent fuel rod bundle to the transfer platform, and is also used to control the clamping mechanism to clamp each layer of spent fuel rod bundle in layers and then move each layer of spent fuel rod bundle to a conveyor line and arrange them into a single-layer rod arrangement.

[0012] In one embodiment, a laser cutting mechanism is further included, which is arranged downstream of the transmission line. The laser cutting mechanism is used to cut the spent fuel rod bundles in a single-layer rod arrangement. The laser cutting mechanism cuts each spent fuel rod bundle in sequence along the moving path.

[0013] In one embodiment, a method for dismantling a spent fuel bundle is provided, characterized in that it includes the following steps:

[0014] (1) The cutting mechanism cuts open the outer sleeve of the spent fuel rod and separates the outer sleeve from the spent fuel rod bundle;

[0015] (2) The cutting mechanism cuts off the spent fuel bundle;

[0016] (3) The clamping mechanism carries the cut spent fuel bundle to the transfer platform, the first end of the spent fuel bundle is operably fixed by the restraining fixture, and the second end is placed on the supporting fixture;

[0017] (iv) The gripping mechanism moves the spent fuel rod bundles layer by layer to the conveyor line and arranges them in a single-layer arrangement.

[0018] In one of the embodiments, the following steps are also included before step (i): the first chuck moves along the workbench to a preset position and clamps the first end of the spent fuel rod through the first telescopic clamp on the first rotating clamping head after being extended, the second chuck moves along the workbench to a preset position and clamps the second end of the spent fuel rod through the second telescopic clamp on the second rotating clamping head after being extended, the motor controls the first rotating disk of the first rotating clamping head, the second rotating disk of the second rotating clamping head and the third rotating disk of the third rotating clamping head to rotate and synchronously drive the spent fuel rod to rotate under the cutting mechanism; the first chuck and the second chuck move along the workbench to separate the outer sleeve from the spent fuel rod bundle and place the outer sleeve in the storage space of the workbench for temporary storage.

[0019] In one of the embodiments, the following steps are also included before step (ii): the first chuck moves along the workbench to a preset position to clamp the first end of the spent fuel rod bundle; the second chuck moves along the workbench to a preset position to clamp the second end of the spent fuel rod bundle; the first chuck and the second chuck synchronously drive the spent fuel rod bundle to rotate below the cutting mechanism.

[0020] In one of the embodiments, in step (iv), the clamping mechanism includes a fixed first gripper and a movable second gripper, and after the first gripper grips the first end of the n-th layer of spent fuel rod bundle, the restraining clamp is operably released, the clamping mechanism rises to drive the first gripper and the first end of the n-th layer of spent fuel rod bundle to rise, and the second gripper moves in the direction of the first gripper, grabs the n-th layer of spent fuel rod bundle from the gap formed after the n-th layer of spent fuel rod bundle rises, and moves to the second end of the spent fuel rod bundle, where n≥1.

[0021] In one of the embodiments, the following steps are also included: after the clamping mechanism places the spent fuel rod bundles on the conveyor line in a single-layer rod arrangement, the conveyor belt moves the single-layer arranged spent fuel rod bundles to the lower end of the laser cutting mechanism, and the laser cutting mechanism cuts the spent fuel rod bundles in sequence along the arrangement line of the spent fuel rod bundles.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The dismantling device and method for spent fuel rod bundles of the present invention have a simple structure and a high degree of automation, and can effectively replace the traditional manual arrangement method for processing spent fuel rods, thereby ensuring safety during operation; can efficiently dismantle complexly stacked spent fuel rod bundles, and significantly improve dismantling efficiency; can skillfully arrange the originally tightly stacked spent fuel rods into a uniform single-layer rod arrangement form, which not only enables each spent fuel rod to be clearly displayed and independently processed, but also greatly simplifies the subsequent work processes of key links such as fuel rod classification, detection, storage and reprocessing, and effectively reduces the complexity and difficulty of technical operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic diagram of the overall structure of a spent fuel bundle dismantling device according to the present invention.

[0025] Figure 2 The present invention is a schematic structural diagram of a transfer platform and a conveyor line of a spent fuel bundle disassembly device.

[0026] Figure 3 The present invention is a schematic structural diagram of a clamping mechanism of a spent fuel bundle disassembly device.

[0027] Figure 4 The invention discloses a structural schematic diagram of a first chuck and a second chuck in a dismantling device for a spent fuel bundle.

[0028] Figure 5 The present invention is a schematic flow chart of a method for disassembling a spent fuel bundle. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0030] like Figure 1As shown, this embodiment provides a dismantling device for a spent fuel rod bundle, comprising a workbench 10, a fixed chuck 20 fixedly mounted on the workbench 10, the fixed chuck 20 being used to fix a first end of a spent fuel rod, a cutting mechanism 30 being arranged above the fixed chuck 20, the cutting mechanism 30 being used to cut an outer sleeve of the spent fuel rod bundle and the spent fuel rod bundle 50, so that the outer sleeve and the spent fuel rod bundle 50 are separated from the fixed chuck 20; and further comprising a first chuck 101 and a second chuck 102 movable along the workbench 10, the first chuck 101 and the second chuck 102 being used to clamp and carry the outer sleeve of the spent fuel rod so that the outer sleeve is separated from the spent fuel rod bundle, specifically: the first chuck 101, the second chuck 102 and the fixed chuck 20 are respectively provided with a first rotating clamping head 1011, a second rotating clamping head 1021 and a third rotating clamping head 201, the three rotating clamping heads can clamp and drive the outer sleeve to rotate under the cutting mechanism. The first chuck 101 moves along the workbench 10 to a preset position and clamps the first end of the spent fuel rod through the first rotating clamping head 1011. The second chuck 102 moves along the workbench 10 to a preset position and clamps the second end of the spent fuel rod through the second rotating clamping head 1021. The first rotating clamping head 1011, the second rotating clamping head 1021 and the third rotating clamping head 201 synchronously drive the outer sleeve and the spent fuel rod bundle 50 to rotate below the cutting mechanism 30. The cutting mechanism 30 emits a laser to cut off the outer sleeve sleeved outside the spent fuel rod bundle. Then the first chuck 101 and the second chuck 102 clamp the sleeve and move in the direction of the principle fixed chuck 20, so as to peel the outer sleeve from the outside of the spent fuel rod bundle 50 and transport it to the storage space 104 of the workbench 10 for temporary storage. The dismantling device of the spent fuel rod bundle also includes at least four supporting fixtures 103 that can be lifted and connected to the workbench 10. The supporting fixtures are used to move the outer sleeve to the preset position. The outer sleeve and the spent fuel rod bundle 50 are provided with support at the same time, and the support fixture 103 provides support to the outer sleeve or the spent fuel rod bundle 50 simultaneously or alternately with the first chuck 101 and the second chuck 102. The support fixture 103 is arranged on the moving path of the first chuck 101 and the second chuck 102. The support fixture 103 can be operated to descend into the accommodation space of the workbench 10, so that the first chuck 101 and the second chuck 102 can smoothly move to the preset position on the moving path to clamp the outer sleeve or the spent fuel rod bundle; the support fixture 103 can be operated to rise to the preset support position to provide support for the outer sleeve or the spent fuel rod bundle. When the first chuck 101 and the second chuck 102 do not clamp the outer sleeve or the spent fuel rod bundle, when the at least two support fixtures 103 provide support for the outer sleeve or the spent fuel rod bundle at the same time, the outer sleeve or the spent fuel rod bundle can be placed in the accommodation space for temporary storage as the support fixture 103 descends;The dismantling device of the spent fuel rod bundle also includes a clamping mechanism 40, which can move along the vertical direction of the workbench 10, and is used to first transport the spent fuel rod bundle 50 as a whole from the workbench 30 to the transfer platform 60, and then transport the spent fuel rod bundle 50 in layers to the conveyor line 70, and arrange the spent fuel rod bundle 50 in a single-layer rod arrangement. Specifically: the first chuck 101, the second chuck 102 and the fixed chuck 20 are respectively provided with a first rotating clamping head 1011, a second rotating clamping head 1021 and a third rotating clamping head 201, the first rotating clamping head 1011 is provided with a first rotating disk 1012, and the first rotating The disk 1012 is provided with four first telescopic clamps 1013; the second rotating clamping head 1021 is provided with a second rotating disk 1022, and the second rotating disk 1022 is provided with four second telescopic clamps 1023; the third rotating clamping head 201 is provided with a third rotating disk, and the third rotating disk is provided with four third telescopic clamps. When the first telescopic clamp 1013, the second telescopic clamp 1023 and the third telescopic clamp are extended, the outer sleeve or the spent fuel rod bundle 50 can be clamped. Then the motor controls the first rotating disk 1012, the second rotating disk 1022 and the third rotating disk to rotate and drive the spent fuel rod bundle 50 to rotate under the cutting mechanism. The cutting mechanism The cutting mechanism 30 emits a laser to cut off the end of the spent fuel rod bundle 50 close to the fixed chuck, the motor controls the first rotating disk 1012, the second rotating disk 1022 and the third rotating disk to stop rotating, the first telescopic clamp 1013, the second telescopic clamp 1023 and the third telescopic clamp are retracted to release the outer sleeve or the spent fuel rod bundle 50, and then the clamping mechanism 40 moves the spent fuel rod bundle 50 as a whole from the workbench 30 to the transfer platform 60, the clamping mechanism 40 includes a fixed first gripping clamp 401 and a movable second gripping clamp 402, the first gripping clamp 401 is used to move to the top of the spent fuel rod bundle 50 to grip the first end of the n-th layer of spent fuel rod bundle and attach it to the transfer platform 60. One end is lifted to form a gap, and the second gripper is used to grab the nth layer of spent fuel rod bundles from the gap and move to the second end of the nth layer of spent fuel rod bundles, n≥1. After grabbing the spent fuel rod bundles arranged in the same layer, the gripping mechanism 40 moves the single-layer spent fuel rod bundles to the conveyor 70, repeats the above actions, and sequentially places the spent fuel rod bundles on the conveyor line. The nth layer of spent fuel rod bundles are placed in the first position, and the n+1th layer of spent fuel rod bundles are placed in the second position adjacent to the first position, and so on. Finally, the spent fuel rod bundles form a single-layer rod arrangement. Furthermore, a spent fuel rod bundle disassembly device provided in this embodiment is provided with a shielding room on the periphery to prevent radiation leakage. A spent fuel rod bundle disassembly device provided in this embodiment has a simple structure and a high degree of automation. It can effectively replace the traditional manual arrangement method to handle spent fuel rods, ensuring safety during operation; the disassembly device can efficiently disassemble complex stacked spent fuel rod bundles, significantly improving the disassembly efficiency;The dismantling device can cleverly arrange the originally tightly stacked spent fuel rods into a uniform single-layer arrangement, which not only allows each spent fuel rod to be clearly displayed and handled independently, but also greatly simplifies the subsequent key links of fuel rod classification, testing, storage and reprocessing, effectively reducing the complexity and difficulty of technical operations. ;

[0031] like Figure 2 In one embodiment, the transfer platform 60 includes a restraining clamp 601 and at least two supporting clamps 602, wherein the restraining clamp 601 is operable to fix or loosen the first end 501 of the spent fuel rod bundle 50, and the supporting clamp 602 is used to provide support for the free end of the spent fuel rod bundle 50. Specifically, after the clamping mechanism 40 transports the spent fuel rod bundle 50 to the transfer platform, the restraining clamp 601 loosens and accommodates the first end 501 of the spent fuel rod bundle and then tightens and fixes the first end of the spent fuel rod bundle. Under the joint support of the restraining clamp 601 and the supporting clamp, the spent fuel rod bundle is in a state of layered aggregation and stacking, so as to facilitate the subsequent layered grasping and transportation of each layer of spent fuel rods.

[0032] like Figure 2-Figure 4 As shown, in one embodiment, the first gripper 401 is connected to a first cylinder 4011, and the first cylinder 4011 is used to control the size of the opening of the first gripper 401, so that the opening of the first gripper matches the first end 501 of each layer of spent fuel rod bundles; the second gripper 402 is connected to a second cylinder 4021, and the second cylinder 4021 is used to control the size of the opening of the second gripper 402, so that the opening of the second gripper 402 matches the second end of each layer of spent fuel rod bundles, and the second gripper 402 is also connected to a third cylinder 4023, and the third cylinder 4023 is used to control the second gripper 402 to move toward or away from the first gripper 401. The first gripper 401, the second gripper 402, the first cylinder 4011, the second cylinder 4022, and the third cylinder 4023 are all arranged on the bottom plate 400 of the clamping mechanism. Furthermore, the clamping mechanism 40 is also connected to a three-axis moving system (not shown in the figure), which is used to control the clamping mechanism 40 to move to the top of the workbench 10 to clamp the spent fuel rod bundle 50 and then move the spent fuel rod bundle 50 to the transfer platform 60, and is also used to control the clamping mechanism 40 to clamp each layer of spent fuel rod bundle 50 in layers and then move each layer of spent fuel rod bundle 50 to the conveyor line 70 and arrange them into a single-layer rod arrangement.

[0033] In one embodiment, a laser cutting mechanism (not shown) is further included at the downstream of the transmission line, and the laser cutting mechanism is used to cut the spent fuel rod bundle 50 in the form of a single-layer rod arrangement. The laser cutting mechanism cuts each spent fuel rod bundle in sequence along the moving path, and each spent fuel rod after the single-layer rod arrangement can be intuitively displayed and independently processed. This arrangement facilitates the positioning and operation of the laser cutting head, so that each rod can obtain an independent processing opportunity, avoiding mutual interference, greatly simplifying the process of laser cutting spent fuel rods, effectively reducing the cutting difficulty, and significantly improving the cutting efficiency. In addition, laser cutting generates very little dust, reducing the risk of radioactive material diffusion, thereby effectively protecting the health and safety of operators, and also reducing the possibility of environmental pollution.

[0034] like Figure 5 As shown, in one embodiment, a method for disassembling a spent fuel bundle is provided, comprising the following steps:

[0035] (1) The cutting mechanism cuts open the outer sleeve of the spent fuel rod, and separates the outer sleeve from the spent fuel rod bundle through the coordinated operation of the first chuck, the second chuck, the supporting fixture and other components;

[0036] (2) The cutting mechanism cuts off the spent fuel bundle;

[0037] (3) The clamping mechanism carries the cut spent fuel bundle to the transfer platform, the first end of the spent fuel bundle is operably fixed by the restraining fixture, and the second end is placed on the supporting fixture;

[0038] (iv) The gripping mechanism moves the spent fuel rod bundles layer by layer to the conveyor line and arranges them in a single-layer arrangement.

[0039] The present embodiment provides a method for disassembling a spent fuel rod bundle. By optimizing the processing steps, the tightly stacked spent fuel rods can be arranged into a uniform single-layer rod arrangement, so that each spent fuel rod can be clearly displayed and processed independently, which can greatly simplify the subsequent workflow of key links such as fuel rod classification, detection, storage and reprocessing, effectively reduce the complexity and difficulty of technical operations, reduce the need for manual intervention, further shorten the processing cycle, and significantly improve the efficiency of overall subsequent processing.

[0040] In one of the embodiments, the following steps are included before step (i): the first chuck moves along the workbench to a preset position and clamps the first end of the spent fuel rod through the first rotating clamping head, the second chuck moves along the workbench to a preset position and clamps the second end of the spent fuel rod through the second rotating clamping head, the first rotating clamping head, the second rotating clamping head and the third rotating clamping head synchronously drive the spent fuel rod to rotate under the cutting mechanism; the first chuck and the second chuck move along the workbench to separate the outer sleeve from the spent fuel rod bundle and place the outer sleeve in the storage space of the workbench for temporary storage.

[0041] In one of the embodiments, the following steps are also included before step (ii): the first chuck moves along the workbench to a preset position to clamp the first end of the spent fuel rod bundle; the second chuck moves along the workbench to a preset position to clamp the second end of the spent fuel rod bundle; the first chuck and the second chuck synchronously drive the spent fuel rod bundle to rotate below the cutting mechanism.

[0042] In one of the embodiments, in step (iv), the clamping mechanism includes a fixed first gripper and a movable second gripper, and after the first gripper grips the first end of the n-th layer of spent fuel rod bundle, the restraining clamp is operably released, the clamping mechanism rises to drive the first gripper and the first end of the n-th layer of spent fuel rod bundle to rise, and the second gripper moves in the direction of the first gripper, grabs the n-th layer of spent fuel rod bundle from the gap formed after the n-th layer of spent fuel rod bundle rises, and moves to the second end of the spent fuel rod bundle, where n≥1.

[0043] In one of the embodiments, the following steps are also included: a laser cutting mechanism cuts the spent fuel rods in a single-layer rod arrangement; after the clamping mechanism places the spent fuel rod bundles in a single-layer rod arrangement on the conveyor line, the conveyor belt moves the single-layer arranged spent fuel rod bundles to the lower end of the laser cutting mechanism; and the laser cutting mechanism cuts the spent fuel rod bundles in sequence along the arrangement line of the spent fuel rod bundles.

[0044] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0045] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A spent fuel rod bundle disassembly device, characterized in that: The invention comprises a workbench, a fixed chuck fixedly mounted on the workbench, the fixed chuck being used to fix the first end of the spent fuel rod, a cutting mechanism being arranged above the fixed chuck, the cutting mechanism being used to cut the outer sleeve of the spent fuel rod bundle and the spent fuel rod bundle, so that the outer sleeve and the spent fuel rod bundle are separated from the fixed chuck; the invention also comprises a first chuck and a second chuck movable along the workbench, the first chuck and the second chuck being used to carry the outer sleeve of the spent fuel rod so that the outer sleeve is separated from the spent fuel rod bundle; the invention also comprises a supporting fixture connected to the workbench by lifting and lowering, and being used to move the outer sleeve and the spent fuel rod bundle to the outer sleeve at a preset time. The spent fuel rod bundle is provided with support; and the clamping mechanism is also included, which can be moved in the vertical direction of the workbench, and is used to first carry the spent fuel rod bundle to the transfer platform and then carry the spent fuel rod bundle to the conveyor line in layers, and arrange the spent fuel rod bundle into a single-layer rod arrangement form, the clamping mechanism includes a fixed first gripper and a movable second gripper, the first gripper is used to move to the top of the spent fuel rod bundle to grip the first end of the n-th layer of spent fuel rod bundle and lift the first end to form a gap, the second gripper is used to grip the n-th layer of spent fuel rod bundle from the gap and move to the second end of the n-th layer of spent fuel rod bundle, n≥1.

2. The device for dismantling a spent fuel bundle according to claim 1, characterized in that: The first chuck, the second chuck and the fixed chuck are respectively provided with a first rotating clamping head, a second rotating clamping head and a third rotating clamping head, the first rotating clamping head is provided with a first rotating disk, and the first rotating disk is provided with four first telescopic clamps; the second rotating clamping head is provided with a second rotating disk, and the second rotating disk is provided with four second telescopic clamps; the third rotating clamping head is provided with a third rotating disk, and the third rotating disk is provided with four third telescopic clamps, and the first telescopic clamp, the second telescopic clamp and the third telescopic clamp can clamp the outer sleeve or the spent fuel rod bundle when they are extended, and the motor controls the first rotating disk, the second rotating disk and the third rotating disk to rotate and drive the outer sleeve or the spent fuel rod bundle to rotate under the cutting mechanism, and the outer sleeve or the spent fuel rod bundle is released after the first telescopic clamp, the second telescopic clamp and the third telescopic clamp are retracted.

3. The device for dismantling a spent fuel bundle according to claim 1, characterized in that: The transfer platform comprises a restraining fixture and a supporting fixture. The restraining fixture is operable to fix or loosen the first end of the spent fuel rod bundle, and the supporting fixture is used to provide support for the free end of the spent fuel rod bundle.

4. The device for dismantling a spent fuel bundle according to claim 1, characterized in that: The first gripper is connected to a first cylinder, which is used to control the size of the opening of the first gripper so that the opening of the first gripper matches the first end of each layer of spent fuel rod bundles; the second gripper is connected to a second cylinder, which is used to control the size of the opening of the second gripper so that the opening of the second gripper matches the second end of each layer of spent fuel rods; the second gripper is also connected to a third cylinder, which is used to control the second gripper to move toward or away from the first gripper; the first gripper, the second gripper, the first cylinder, the second cylinder and the third cylinder are all arranged on the bottom plate of the clamping mechanism.

5. The device for dismantling a spent fuel bundle according to claim 1, characterized in that: The clamping mechanism is also connected to a three-axis moving system, which is used to control the clamping mechanism to move to the top of the workbench to clamp the spent fuel rod bundle and then move the spent fuel rod bundle to the transfer platform, and is also used to control the clamping mechanism to clamp each layer of spent fuel rod bundle in layers and then move each layer of spent fuel rod bundle to a conveyor line and arrange them into a single-layer rod arrangement.

6. A spent fuel bundle disassembly device according to any one of claims 1 to 5, characterized in that: It also includes a laser cutting mechanism arranged downstream of the transmission line, the laser cutting mechanism is used to cut the spent fuel rod bundles in the form of a single-layer rod arrangement, and the laser cutting mechanism cuts each spent fuel rod bundle in sequence along the moving path.

7. A method for dismantling a spent fuel bundle, characterized in that: The following steps are involved: (1) The cutting mechanism cuts open the outer sleeve of the spent fuel rod and separates the outer sleeve from the spent fuel rod bundle; (2) The cutting mechanism cuts off the spent fuel bundle; (3) The clamping mechanism carries the cut spent fuel bundle to the transfer platform, the first end of the spent fuel bundle is operably fixed by the restraining fixture, and the second end is placed on the supporting fixture; (iv) The gripping mechanism moves the spent fuel rod bundles layer by layer to the conveyor line and arranges them in a single-layer rod arrangement.

8. The method for dismantling a spent fuel bundle according to claim 7, characterized in that: The method also includes the following steps before step (1): the first chuck moves along the workbench to a preset position and clamps the first end of the spent fuel rod after the first telescopic clamp on the first rotating clamping head is extended, the second chuck moves along the workbench to a preset position and clamps the second end of the spent fuel rod after the second telescopic clamp on the second rotating clamping head is extended, the motor controls the first rotating disk of the first rotating clamping head, the second rotating disk of the second rotating clamping head and the third rotating disk of the third rotating clamping head to rotate and synchronously drive the spent fuel rod to rotate below the cutting mechanism; the first chuck and the second chuck move along the workbench to separate the outer sleeve from the spent fuel rod bundle and place the outer sleeve in the storage space of the workbench for temporary storage.

9. The method for dismantling a spent fuel bundle according to claim 7, characterized in that: Before step (ii), the following steps are also included: the first chuck moves along the workbench to a preset position to clamp the first end of the spent fuel rod bundle; the second chuck moves along the workbench to a preset position to clamp the second end of the spent fuel rod bundle; the first chuck and the second chuck synchronously drive the spent fuel rod bundle to rotate below the cutting mechanism.

10. The method for dismantling a spent fuel bundle according to claim 7, characterized in that: In step (iv), the clamping mechanism includes a fixed first gripper and a movable second gripper. After the first gripper grips the first end of the n-th layer of spent fuel rod bundle, the restraining clamp is operably released, the clamping mechanism rises to drive the first gripper and the first end of the n-th layer of spent fuel rod bundle to rise, the second gripper moves in the direction of the first gripper, grabs the n-th layer of spent fuel rod bundle from the gap formed after the n-th layer of spent fuel rod bundle rises, and moves to the second end of the spent fuel rod bundle, where n≥1.

11. The method for dismantling a spent fuel bundle according to any one of claims 6 to 10, characterized in that: The following steps are also included: After the clamping mechanism places the spent fuel rod bundles in a single-layer arrangement on the conveyor line, the conveyor belt moves the single-layer arranged spent fuel rod bundles to the lower end of the laser cutting mechanism, and the laser cutting mechanism cuts the spent fuel rod bundles in sequence along the arrangement line of the spent fuel rod bundles.

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