Device for replacing reactor fuel

Abstract

The utility model provides a device for replacing reactor fuel, and particularly relates to the technical field of reactor fuel assembly replacement. The device is used for replacing the fuel assembly in the pressure vessel, and an opening is formed in one end of the pressure vessel. The device comprises a frame body, a moving trolley, a transfer device and a gripping apparatus, wherein the frame body is arranged at one end, with an opening, of the pressure container; the moving trolley is arranged on the side, facing the pressure container, of the frame body and provided with a transfer container. The transfer device is arranged on the frame body and is provided with a moving end facing one side of the pressure container, and the moving end can be driven by the driving device to reciprocate in the X-axis direction, the Y-axis direction and the Z-axis direction; the gripping apparatus is arranged at the moving end and is driven by the transfer device to move between the pressure vessel and the transfer vessel so as to grip a spent fuel assembly in the pressure vessel to the transfer vessel and / or grip a new fuel assembly in the transfer vessel to the pressure vessel, so that stable and reliable replacement of the reactor fuel is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of reactor fuel assembly replacement, and particularly relates to a device for reactor fuel replacement. Background Art

[0002] The gas-cooled micro reactor is a kind of micro nuclear reactor system that uses gas (usually helium) as the coolant, with the characteristics of high integration and high coupling of equipment. The horizontal core design of the gas-cooled micro reactor provides structural stability and safety with its low center of gravity layout. At the same time, it optimizes thermal management, facilitates maintenance and improves cooling efficiency, and enhances the resistance to external impacts. In a gas-cooled micro reactor, the replacement of fuel assemblies usually needs to be completed by special refueling and discharging machines, which can ensure the precise positioning and safe operation of fuel assemblies when they are loaded into the reactor vessel or unloaded from the reactor. Summary of the Utility Model

[0003] In view of the above-mentioned disadvantages of the prior art, the utility model provides a device for reactor fuel replacement to achieve stable and reliable replacement of fuel assemblies.

[0004] To achieve the above-mentioned purpose and other related purposes, the utility model provides a device for reactor fuel replacement, which is used to replace the fuel assembly in a pressure vessel, and one end of the pressure vessel is provided with an opening. The device includes a frame body, a moving trolley, a transfer device and a gripper. The frame body is arranged at the end of the pressure vessel with the opening; the moving trolley is arranged on the side of the frame body facing the pressure vessel, and a transfer container is configured thereon; the transfer device is arranged on the frame body and has a moving end arranged towards the side of the pressure vessel. The moving end can reciprocate along the Z-axis direction under the drive of a first driving device, reciprocate along the Y-axis direction under the drive of a second driving device, and reciprocate along the X-axis direction under the drive of a third driving device; the gripper is arranged at the moving end and moves between the pressure vessel and the transfer container under the drive of the transfer device to grab the spent fuel assembly in the pressure vessel to the transfer container, and / or grab the new fuel assembly in the transfer container to the pressure vessel.

[0005] In an example of the utility model, the transfer device includes a first motion device, a second motion device and a third motion device. The first motion device includes a first sliding seat, the second motion device includes a second sliding seat, and the third motion device includes a slide bar. The first sliding seat is slidably mounted on the frame body along the Z-axis direction under the drive of a first driving device, the second sliding seat is slidably mounted on the first sliding seat along the Y-axis direction under the drive of a second driving device, the slide bar is slidably mounted on the second sliding seat along the X-axis direction under the drive of a third driving device, and the moving end is located at one end of the slide bar facing the pressure vessel.

[0006] In an example of the present utility model, the first motion device further includes a first screw rod, a first connection block, and a first sliding block. The first connection block and the first sliding block are both fixedly arranged on one side of the first sliding seat facing the frame body. The first screw rod is fixedly connected to the output end of the first driving device. The first connection block is sleeved on the first screw rod and is in transmission connection with the first screw rod. A first sliding rail is arranged on one side of the frame body facing the first sliding seat, and a sliding groove matching the first sliding rail is arranged on one side of the first sliding block facing the frame body.

[0007] In an example of the present utility model, the second motion device further includes a second screw rod, a second connection block, and a second sliding block. The second connection block and the second sliding block are both fixedly arranged on one side of the second sliding seat facing the first sliding seat. The second screw rod is fixedly connected to the output end of the second driving device. The second connection block is sleeved on the second screw rod and is in transmission connection with the second screw rod. A second sliding rail is arranged on one side of the first sliding seat facing the second sliding seat, and a sliding groove matching the second sliding rail is arranged on one side of the second sliding block facing the first sliding seat.

[0008] In an example of the present utility model, the sliding rod is meshed with the output end of the third driving device.

[0009] In an example of the present utility model, a swivel joint for installing the gripper is fixedly installed on the mobile end, and the swivel joint is clamped with the gripper.

[0010] In an example of the present utility model, the device for reactor fuel replacement further includes a conversion device for the gripper conversion, and the conversion device is fixedly installed on one side of the frame body facing the pressure vessel.

[0011] In an example of the present utility model, the conversion device includes a fourth driving device and a connecting plate. The connecting plate is fixedly connected to the output end of the fourth driving device, and the connecting plate rotates synchronously with the output end of the fourth driving device. Claw clips for fixing the gripper are arranged at both ends of the connecting plate.

[0012] In an example of the present utility model, the first driving device, the second driving device, the third driving device, and the conversion device are respectively electrically connected to a controller.

[0013] In an example of the present utility model, a supporting part for supporting the fuel assembly is fixedly arranged on one side of the second sliding seat facing the pressure vessel, and the supporting part extends towards the pressure vessel.

[0014] The device for reactor fuel replacement provided by the present utility model is used to replace the fuel assemblies in a pressure vessel. The frame is slidably arranged at one end of the pressure vessel with an opening. The mobile trolley is arranged on the side of the frame facing the pressure vessel, and a transfer container for holding the fuel assemblies is configured thereon. The transfer device is arranged on the side of the frame facing the pressure vessel. The gripper is arranged at the mobile end on the side of the transfer device facing the pressure vessel, and can move along the X-axis, Y-axis, and Z-axis under the drive of the drive device, so as to move between the pressure vessel and the transfer container, grab the spent fuel assemblies in the pressure vessel to the transfer container, and / or grab the new fuel assemblies in the transfer container to the pressure vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the device for reactor fuel replacement of the present utility model in an embodiment;

[0017] Figure 2 It is an installation schematic diagram of the frame, transfer device and gripper of the device for reactor fuel replacement of the present utility model in an embodiment;

[0018] Figure 3 It is an installation schematic diagram of the frame, transfer device and gripper of the device for reactor fuel replacement of the present utility model in another embodiment;

[0019] Figure 4 For Figure 2 the enlarged schematic diagram of area A in

[0020] Figure 5 For Figure 2 the enlarged schematic diagram of area B in

[0021] DESCRIPTION OF REFERENCE NUMERALS

[0022] 10. Pressure vessel; 100. Frame; 110. First slide rail; 200. Mobile trolley; 210. Transfer container; 300. Transfer device; 310. First motion device; 311. First sliding seat; 3111. Second slide rail; 312. First screw; 313. First connecting block; 314. First sliding block; 320. Second motion device; 321. Second sliding seat; 3211. Support part; 322. Second screw; 323. Second connecting block; 324. Second sliding block; 330. Third motion device; 331. Slide bar; 332. Adapter; 400. Gripper; 500. First drive device; 600. Second drive device; 700. Third drive device; 800. Conversion device; 810. Fourth drive device; 820. Connecting plate; 830. Claw clip. Detailed implementation manners

[0023] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. It should also be understood that the terms used in the embodiments of the present invention are for the purpose of describing specific specific implementation manners, rather than limiting the protection scope of the present invention. The test methods without specific conditions noted in the following embodiments are usually carried out under conventional conditions or according to the conditions recommended by each manufacturer.

[0024] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration, rather than used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in technical content, should also be regarded as the scope of implementation of the present invention.

[0025] Please refer to Figures 1 to 3, the present utility model provides a device for replacing reactor fuel, which is used to replace the fuel assembly in the pressure vessel 10. One end of the pressure vessel 10 is provided with an opening. The device includes a frame 100, a mobile trolley 200, a transfer device 300 and a gripper 400. The frame 100 is arranged at one end of the pressure vessel 10 with an opening. The mobile trolley 200 is arranged on the side of the frame 100 facing the pressure vessel 10. A transfer container 210 is configured on the mobile trolley 200. The transfer device 300 is installed on the frame 100. The gripper 400 is arranged on the transfer device 300 and can move along the X-axis, Y-axis and Z-axis under the drive of a drive device to move between the pressure vessel 10 and the transfer container 210, so as to grab the spent fuel assembly in the pressure vessel 10 to the transfer container 210, and / or grab the new fuel assembly in the transfer container 210 to the pressure vessel 10, and complete the transfer of the fuel assembly between the pressure vessel 10 and the transfer container 210.

[0026] Please refer to Figures 1 to 4 , in an embodiment, the transfer device 300 is arranged on the frame 100. The transfer device 300 has a mobile end arranged on the side facing the pressure vessel 10. The mobile end can reciprocate along the Z-axis direction under the drive of a first drive device 500, and reciprocate along the Y-axis direction under the drive of a second drive device 600, and reciprocate along the X-axis direction under the drive of a third drive device 700. In this embodiment, the transfer device 300 includes a first motion device 310, a second motion device 320 and a third motion device 330. The first motion device 310 includes a first sliding seat 311. The second motion device 320 includes a second sliding seat 321. The third motion device 330 includes a slide bar 331. The first sliding seat 311 is slidably installed on the frame 100 along the Z-axis direction under the drive of the first drive device 500. The second sliding seat 321 is slidably installed on the first sliding seat 311 along the Y-axis direction under the drive of the second drive device 600. The slide bar 331 is slidably installed on the second sliding seat 321 along the X-axis direction under the drive of the third drive device 700. The mobile end is located at one end of the slide bar 331 facing the pressure vessel 10. Further, the first drive device 500, the second drive device 600 and the third drive device 700 are respectively electrically connected to a controller to realize the automatic transfer of the fuel assembly. The specific control principle can refer to the prior art and will not be elaborated here. The controller can be configured as a part of the device of the present application or can be independently configured outside the device of the present application according to the use requirements.

[0027] Please refer to Figures 1 to 4, in one embodiment, the first motion device 310 further includes a first screw 312, a first connecting block 313, and a first sliding block 314. Both the first connecting block 313 and the first sliding block 314 are fixedly arranged on the side of the first sliding seat 311 facing the frame 100. The first screw 312 is fixedly connected to the output end of the first driving device 500. The first connecting block 313 is sleeved on the first screw 312 and is in transmission connection with the first screw 312. A first slide rail 110 is arranged on the side of the frame 100 facing the first sliding seat 311. A chute matching the first slide rail 110 is arranged on the side of the first sliding block 314 facing the frame 100. The second motion device 320 further includes a second screw 322, a second connecting block 323, and a second sliding block 324. Both the second connecting block 323 and the second sliding block 324 are fixedly arranged on the side of the second sliding seat 321 facing the first sliding seat 311. The second screw 322 is fixedly connected to the output end of the second driving device 600. The second connecting block 323 is sleeved on the second screw 322 and is in transmission connection with the second screw 322. A second slide rail 3111 is arranged on the side of the first sliding seat 311 facing the second sliding seat 321. A chute matching the second slide rail 3111 is arranged on the side of the second sliding block 324 facing the first sliding seat 311. The slide bar 331 is engaged with the output end of the third driving device 700.

[0028] In this embodiment, a first encoder is fixedly installed at the output end of the first driving device 500, a second encoder is fixedly installed at the output end of the second driving device 600, and a third encoder is fixedly installed at the output end of the third driving device 700. The controller receives the signals sent by the first encoder, the second encoder, and the third encoder, and respectively converts them into the moving distances of the first sliding seat 311, the second sliding seat 321, and the slide bar 331, so as to realize the control of the moving distances of the first sliding seat 311, the second sliding seat 321, and the slide bar 331. The specific control process can refer to the existing control means and will not be elaborated here.

[0029] Please refer to Figures 1 to 4, in one embodiment, the gripper 400 is arranged on the mobile end. A adapter 332 for installing the gripper 400 is fixedly installed on the mobile end, and the adapter 332 is snap-connected to the gripper 400. Driven by the transfer device 300, the gripper 400 moves between the pressure vessel 10 and the transfer container 210 to grab the spent fuel assemblies in the pressure vessel 10 into the transfer container 210, and / or grab the fresh fuel assemblies in the transfer container 210 into the pressure vessel 10. In this embodiment, the gripper 400 grabs the spent fuel assemblies in the pressure vessel 10 into the transfer container 210 and grabs the fresh fuel assemblies in the transfer container 210 into the pressure vessel 10 to realize the replacement of the fuel assemblies. The gripper 400 can be a manipulator structure that can currently extend into the pressure vessel 10 and the transfer container 210 to take out the fuel assemblies from the pressure vessel 10 and the transfer container 210. The gripper 400 in this application is obtained by general commercial means, and the specific structure and control principle can refer to the existing means.

[0030] Further, a support portion 3211 for supporting the fuel assembly is fixedly arranged on the side of the second sliding seat 321 facing the pressure vessel 10, and the support portion 3211 extends towards the pressure vessel 10. When the gripper 400 grabs the fuel assembly, the sliding rod 331 moves along the X-axis direction towards the end away from the pressure vessel 10 and places the fuel assembly in the support portion 3211, which can reduce the load on the sliding rod 331, improve the mobility of the sliding rod 331, and make it easier for the sliding rod 331 to start and stop.

[0031] Please refer to Figures 1 to 3 and Figure 5 , in one embodiment, in order to meet the gripping requirements for different fuel assemblies, the device for reactor fuel replacement further includes a conversion device 800 for converting the gripper 400. The conversion device 800 is fixedly installed on the side of the frame 100 facing the pressure vessel 10, and the conversion device 800 is electrically connected to the controller to realize the automatic conversion of the gripper 400 according to actual needs. In this embodiment, the conversion device 800 includes a fourth driving device 810 and a connecting plate 820. The connecting plate 820 is fixedly connected to the output end of the fourth driving device 810, and the connecting plate 820 rotates synchronously with the output end of the fourth driving device 810. Claw clips 830 for fixing the gripper 400 are arranged at both ends of the connecting plate 820. When replacing the gripper 400, use the claw clip 830 to fix and remove the gripper to be replaced, rotate the connecting plate 820 to turn the gripper to be used to the adapter 332, and snap-connect the gripper to be used to the adapter 332 to realize the conversion of the gripper 400. Further, in order to reduce the moving distance of the sliding rod 331 and enhance the stability of the sliding rod 331, the frame 100 is horizontally slidably arranged and reciprocates along the X-axis direction under the drive of a fifth driving device (not shown in the figure).

[0032] The operating principle of the device for replacing the reactor fuel assembly of the present utility model is as follows: When transferring the spent fuel assembly from the pressure vessel 10 to the transfer container 210, adjust the positions of the first moving device 310, the second moving device 320, and the third moving device 330 so that the gripper 400 is at the designated position. The third driving device 700 drives the slide bar 331 to move along the X-axis towards the side close to the pressure vessel 10, and the gripper 400 grabs the fuel assembly from the pressure vessel 10. The third driving device 700 drives the slide bar 331 to move along the X-axis towards the side away from the pressure vessel 10 and places the fuel assembly on the support portion 3211. The second driving device 600 drives the second sliding seat 321 to move along the Y-axis to the transfer container 210. The first driving device 500 drives the first sliding seat 311 to move along the Z-axis to the designated position. The third driving device 700 drives the slide bar 331 to move along the X-axis towards the side of the pressure vessel 10. After transporting the fuel assembly to the designated position, the gripper 400 releases the fuel assembly. Adjust the first moving device 310, the second moving device 320, and the third moving device 330 to the designated position to transfer the next fuel assembly. The operating principle of transferring the new fuel assembly from the transfer container 210 to the pressure vessel 10 is the same as that of transferring the spent fuel assembly described above, and will not be elaborated here.

[0033] The device for reactor fuel replacement provided by the present utility model is used to replace the fuel assembly in the pressure vessel. The frame is slidably arranged at one end of the pressure vessel with an opening. The mobile trolley is arranged on the side of the frame facing the pressure vessel, and a transfer container for holding the fuel assembly is configured thereon; the transfer device is arranged on the side of the frame facing the pressure vessel; the gripper is arranged at the mobile end on the side of the transfer device facing the pressure vessel and can move along the X-axis, Y-axis, and Z-axis under the drive of the driving device to realize moving between the pressure vessel and the transfer container, grabbing the spent fuel assembly in the pressure vessel to the transfer container, and / or grabbing the new fuel assembly in the transfer container to the pressure vessel. Therefore, the present utility model effectively overcomes some practical problems in the prior art and thus has high utilization value and practical significance.

[0034] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A device for reactor fuel replacement, which is used to replace the fuel assemblies in a pressure vessel, one end of the pressure vessel is provided with an opening, and is characterized in that, The device includes: a frame body, which is arranged at one end of the pressure vessel with an opening; a mobile trolley, which is arranged on the side of the frame body facing the pressure vessel, and a transfer container is configured thereon; a transfer device, which is arranged on the frame body and has a mobile end arranged on the side facing the pressure vessel. The mobile end can reciprocally move along the Z-axis direction under the drive of a first drive device, reciprocally move along the Y-axis direction under the drive of a second drive device, and reciprocally move along the X-axis direction under the drive of a third drive device; a gripper, which is arranged at the mobile end and, driven by the transfer device, moves between the pressure vessel and the transfer container to grab the spent fuel assemblies in the pressure vessel to the transfer container, and / or grab the fresh fuel assemblies in the transfer container to the pressure vessel.

2. The device for reactor fuel replacement according to claim 1, characterized in that, The transfer device includes a first motion device, a second motion device, and a third motion device. The first motion device includes a first sliding seat, the second motion device includes a second sliding seat, and the third motion device includes a slide bar. The first sliding seat is slidably mounted on the frame body along the Z-axis direction under the drive of the first drive device. The second sliding seat is slidably mounted on the first sliding seat along the Y-axis direction under the drive of the second drive device. The slide bar is slidably mounted on the second sliding seat along the X-axis direction under the drive of the third drive device. The mobile end is located at one end of the slide bar facing the pressure vessel.

3. The device for reactor fuel replacement according to claim 2, characterized in that, The first motion device further includes a first screw rod, a first connection block, and a first sliding block. The first connection block and the first sliding block are both fixedly arranged on the side of the first sliding seat facing the frame body. The first screw rod is fixedly connected to the output end of the first drive device. The first connection block is sleeved on the first screw rod and is in transmission connection with the first screw rod. A first slide rail is arranged on the side of the frame body facing the first sliding seat. A chute matching the first slide rail is arranged on the side of the first sliding block facing the frame body.

4. The device for reactor fuel replacement according to claim 2, characterized in that, The second motion device further includes a second screw rod, a second connection block, and a second sliding block. The second connection block and the second sliding block are both fixedly arranged on the side of the second sliding seat facing the first sliding seat. The second screw rod is fixedly connected to the output end of the second drive device. The second connection block is sleeved on the second screw rod and is in transmission connection with the second screw rod. A second slide rail is arranged on the side of the first sliding seat facing the second sliding seat. A chute matching the second slide rail is arranged on the side of the second sliding block facing the first sliding seat.

5. The device for reactor fuel replacement according to claim 2, characterized in that, The slide bar is meshed with the output end of the third drive device.

6. The device for reactor fuel replacement according to claim 2, characterized in that, A swivel joint for installing the gripper is fixedly installed at the mobile end, and the swivel joint is clamped with the gripper.

7. The device for reactor fuel replacement according to claim 1, characterized in that, The device for reactor fuel replacement further includes a conversion device for the gripper. The conversion device is fixedly installed on the side of the frame body facing the pressure vessel.

8. The device for reactor fuel replacement according to claim 7, characterized in that, The conversion device includes a fourth driving device and a connecting plate. The connecting plate is fixedly connected to the output end of the fourth driving device, and the connecting plate rotates synchronously with the output end of the fourth driving device. Claw clips for fixing the gripper are provided at both ends of the connecting plate.

9. The device for reactor fuel replacement according to claim 7, characterized in that, The first driving device, the second driving device, the third driving device and the conversion device are respectively electrically connected to a controller.

10. The device for reactor fuel replacement according to claim 2, characterized in that, A support portion for supporting the fuel assembly is fixedly provided on one side of the second sliding seat facing the pressure vessel, and the support portion extends towards the pressure vessel.

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