Fuel assembly loading guide apparatus and guide assembly therefor

Abstract

The application discloses a fuel assembly loading guide device and a guide assembly thereof, and belongs to the technical field of nuclear power. The fuel assembly loading guide device comprises a moving platform, a rotating device, a grabber, and a first guide piece and a second guide piece. The moving platform is movably arranged along a first horizontal direction. The rotating device is movably arranged on the moving platform along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction. The grabber is movably arranged on the rotating device along an up-down direction. The first guide piece and the second guide piece are alternately arranged on the grabber. The fuel assembly loading guide device is simple in structure, small in component, low in manufacturing cost, and convenient to operate. The problem that two rotating devices and two lifting pieces need to be arranged in order to place two guide pieces in a flow hole in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of nuclear power technology, and more specifically, to fuel assembly loading and guiding equipment and its guiding components. Background Technology

[0002] During the refueling shutdown, the fuel assembly loading guide is placed on the track of the loading and unloading machine, and the operating platform of the fuel assembly loading guide spans across the refueling pool.

[0003] In related technologies, in order to place the two types of guide components into the drainage holes of the lower plate of the core support, two rotating devices need to be installed on the operating platform, and each rotating device needs to be equipped with a lifting device that drives the guide components up and down. The two lifting devices are connected to the two types of guide components respectively, so as to place the two types of guide components into the drainage holes of the lower plate of the core support. This results in the fuel assembly loading guidance equipment in related technologies having many components, complex structure, and high manufacturing cost. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in the related art. To this end, this invention proposes a fuel assembly loading and guiding device and its guiding components.

[0005] The fuel assembly loading and guiding device of the present invention includes: a mobile platform movably disposed along a first horizontal direction; a rotary device movably disposed on the mobile platform along a second horizontal direction, the second horizontal direction being perpendicular to the first horizontal direction; a gripper movably disposed on the rotary device along a vertical direction; and a first guide member and a second guide member, the first guide member and the second guide member being interchangeably disposed on the gripper.

[0006] Optionally, the first guide member can be switched between the gripper and the moving platform, and the second guide member can be switched between the gripper and the moving platform.

[0007] Optionally, the mobile platform includes a first mounting frame and a second mounting frame, the first guide member is switchably disposed on the gripper and the first mounting frame, and the second guide member is switchably disposed on the gripper and the second mounting frame, wherein the first mounting frame includes a first limiting portion, the first guide member includes a second limiting portion, and the second limiting portion can cooperate with the first limiting portion; or the fuel assembly loading guide device further includes a first pressing member, the first pressing member can cooperate with the first guide member to press the first guide member onto the first mounting frame; or the second mounting frame includes a third limiting portion, the second guide member includes a fourth limiting portion, the fourth limiting portion can cooperate with the third limiting portion; or the fuel assembly loading guide device further includes a second pressing member, the second pressing member can cooperate with the second guide member to press the second guide member onto the second mounting frame.

[0008] Optionally, one of the first limiting portion and the second limiting portion is a first limiting hole extending in the vertical direction, and the other of the first limiting portion and the second limiting portion is a first limiting protrusion that can cooperate within the first limiting hole; or the first pressing member includes a first pressing portion, which is movably disposed in the horizontal direction at a first pressing position and a first retracted position, and the first pressing portion at the first pressing position can cooperate with the first guide member to apply a horizontal pressing force to the first guide member; or one of the third limiting portion and the fourth limiting portion is a second limiting hole extending in the vertical direction, and the other of the third limiting portion and the fourth limiting portion is a second limiting protrusion that can cooperate within the second limiting hole; or the second pressing member includes a second pressing portion, which is movably disposed in the horizontal direction at a second pressing position and a second retracted position, and the second pressing portion at the second pressing position can cooperate with the second guide member to apply a horizontal pressing force to the second guide member.

[0009] Optionally, the gripper includes a body and a hook, the hook being movably disposed on the body between an extended position and a retracted position. When the hook is in the extended position, it can grip the first guide and the second guide, and when the hook is in the retracted position, it can disengage from the first guide and the second guide.

[0010] Optionally, the gripper further includes a reset elastic element, one end of which engages with the body and the other end of which engages with the gripping hook. When the gripping hook is in the retracted position, the reset elastic element is in a deformed state to apply a spring force to the gripping hook to move it to the extended position. When the gripping hook is in the extended position, the reset elastic element is in a deformed state or a natural state.

[0011] Optionally, the body includes a hook mounting portion, the hook being movably disposed on the hook mounting portion between the extended position and the retracted position along a preset direction, the hook including an inclined surface, the inclined surface being able to cooperate with the first guide member and the second guide member, the upper edge of the inclined surface being farther away from the hook mounting portion relative to the lower edge of the inclined surface in the preset direction.

[0012] Optionally, the gripper further includes a buffer assembly, which includes: a pressing member movably disposed on the body in a vertical direction, the pressing member being located above the gripping hook, the pressing member and the gripping hook being able to clamp the first guide member and the second guide member; and a pressing elastic member, one end of the pressing elastic member engaging with the body, and the other end of the pressing elastic member engaging with the pressing member, so that the pressing elastic member can apply a downward elastic force to the pressing member.

[0013] Optionally, the body has a through hole extending vertically, and the pressing member includes: a rod portion movably fitted into the through hole in the vertical direction; an anti-detachment portion connected to the upper end of the rod portion and located above the through hole; and a pressing portion connected to the lower end of the rod portion and located above the hook. The pressing portion and the hook are capable of clamping the first guide member and the second guide member, wherein the upper end of the pressing elastic member engages with the body, and the lower end of the pressing elastic member engages with at least one of the rod portion and the pressing portion.

[0014] Optionally, the first guide includes a first body and a first gripping part, the first gripping part being disposed on the first body, and the second guide includes a second body and a second gripping part, the second gripping part being disposed on the second body, wherein the hook in the extended position can cooperate with the first gripping part and the second gripping part to grip the first guide and the second guide, and the hook in the retracted position can disengage from the first gripping part and the second gripping part.

[0015] Optionally, the gripper further includes a buffer assembly, which includes: a pressing member movably disposed on the body in a vertical direction, the pressing member being located above the gripping hook, the pressing member and the gripping hook being able to clamp the first gripping part and the second gripping part; and a pressing elastic member, one end of the pressing elastic member engaging with the body, and the other end of the pressing elastic member engaging with the pressing member, so that the pressing elastic member can apply a downward elastic force to the pressing member.

[0016] Optionally, the first guide further includes a first unlocking part, which is disposed on the first body and located below the first gripping part. The edge of the first unlocking part is located outside the edge of the first gripping part, and the edge of the first unlocking part can cooperate with the gripping hook to push the gripping hook from the extended position to the retracted position. The second guide further includes a second unlocking part, which is disposed on the second body and located below the second gripping part. The edge of the second unlocking part is located outside the edge of the second gripping part, and the edge of the second unlocking part can cooperate with the gripping hook to push the gripping hook from the extended position to the retracted position.

[0017] Optionally, both the first gripping part and the second gripping part are cylindrical, and both the first unlocking part and the second unlocking part are frustum-shaped. The diameter of the upper surface of the first unlocking part is larger than the diameter of the first gripping part, and the diameter of the upper surface of the second unlocking part is larger than the diameter of the second gripping part; or the gripper includes a plurality of hooks, which are spaced apart on the body along a preset circumferential direction, and the preset circumferential direction can be consistent with the circumferential direction of each of the first gripping part, the second gripping part, the first unlocking part, and the second unlocking part; or the first guide includes one of a positioning hole and a positioning post, the second guide includes one of the positioning hole and the positioning post, and the gripper includes the other of the positioning hole and the positioning post, both of which extend in the vertical direction, and the positioning post can be fitted into the positioning hole; or the first guide includes a first magnetic attraction part, and the second guide includes a second magnetic attraction part.

[0018] Optionally, the fuel assembly loading guide device further includes a telescopic sleeve, the telescopic sleeve comprising: a fixed sleeve disposed on the rotary device; and a movable sleeve movably disposed on the fixed sleeve in a vertical direction, the gripper being disposed on the movable sleeve.

[0019] The guiding component of the fuel assembly loading guiding device of the present invention includes a gripper, a first guide member and a second guide member, wherein the first guide member and the second guide member are alternatively disposed on the gripper.

[0020] Optionally, the gripper includes a body and a hook, the hook being movably disposed on the body between an extended position and a retracted position. The first guide includes a first body and a first gripping part, the first gripping part being disposed on the first body. The second guide includes a second body and a second gripping part, the second gripping part being disposed on the second body. The hook in the extended position can cooperate with the first gripping part and the second gripping part to grip the first guide and the second guide. The hook in the retracted position can disengage from the first gripping part and the second gripping part.

[0021] Optionally, the gripper further includes a buffer assembly, which includes: a pressing member movably disposed on the body in a vertical direction, the pressing member being located above the gripping hook, the pressing member and the gripping hook being able to clamp the first gripping part and the second gripping part; and a pressing elastic member, one end of the pressing elastic member engaging with the body, and the other end of the pressing elastic member engaging with the pressing member, so that the pressing elastic member can apply a downward elastic force to the pressing member.

[0022] Optionally, the first guide further includes a first unlocking part, which is disposed on the first body and located below the first gripping part. The edge of the first unlocking part is located outside the edge of the first gripping part, and the edge of the first unlocking part can cooperate with the gripping hook to push the gripping hook from the extended position to the retracted position. The second guide further includes a second unlocking part, which is disposed on the second body and located below the second gripping part. The edge of the second unlocking part is located outside the edge of the second gripping part, and the edge of the second unlocking part can cooperate with the gripping hook to push the gripping hook from the extended position to the retracted position.

[0023] The fuel assembly loading guide device and its guide assembly of the present invention, by setting a gripper and making the first guide member and the second guide member interchangeably disposed on the gripper, can place the first guide member and the second guide member into the drainage holes of the core support lower plate respectively using the gripper. This eliminates the need for two rotating devices and two lifting devices, thereby simplifying the structure of the fuel assembly loading guide device and reducing its manufacturing cost.

[0024] Furthermore, since there is no need to set up two slewing devices, mutual interference and collision between the two slewing devices can be avoided. This not only eliminates the need for components to prevent collisions between the two slewing devices (such as hard limit switches, laser rangefinders, etc.), but also eliminates the need to consider the problem of the two slewing devices avoiding each other, making the slewing devices and fuel assembly loading and guiding equipment easier to operate.

[0025] The fuel assembly loading and guiding device of the present invention has a simple structure, few parts, low manufacturing cost, and is easy to operate. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of a fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of a fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the gripper of the fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the gripper of the fuel assembly loading and guiding device according to an embodiment of the present invention gripping the first guide member; Figure 6 This is a schematic diagram of the gripper of the fuel assembly loading and guiding device according to an embodiment of the present invention gripping the first guide member; Figure 7 This is a schematic diagram of the gripper of the fuel assembly loading and guiding device according to an embodiment of the present invention gripping the first guide member; Figure 8 This is a schematic diagram of the gripper of the fuel assembly loading and guiding device according to an embodiment of the present invention gripping the first guide member; Figure 9 This is a schematic diagram of the gripper releasing the first guide member of the fuel assembly loading guide device according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the gripper releasing the first guide member of the fuel assembly loading guide device according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the gripper releasing the first guide member of the fuel assembly loading guide device according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the gripper releasing the first guide member of the fuel assembly loading guide device according to an embodiment of the present invention; Figure 13 This is a side view of the adaptive adjustment assembly of the fuel assembly loading guide device according to an embodiment of the present invention; Figure 14 This is a partial structural schematic diagram of the adaptive adjustment component of the fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 15 This is a partial structural schematic diagram of the adaptive adjustment component of the fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 16This is a partial top view of a fuel assembly loading guide device according to an embodiment of the present invention; Figure 17 This is a schematic diagram of the structure of the second guide member of the fuel assembly loading guide device according to an embodiment of the present invention. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] The fuel assembly loading and guiding device 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings. Figures 1-12 , Figure 16 and Figure 17 As shown, the fuel assembly loading and guiding device 100 according to an embodiment of the present invention includes a mobile platform 4, a rotating device 5, a gripper 1, a first guide member 2, and a second guide member 3.

[0029] The mobile platform 4 is movably mounted along a first horizontal direction, and the rotating device 5 is movably mounted on the mobile platform 4 along a second horizontal direction, which is perpendicular to the first horizontal direction. The gripper 1 is movably mounted on the rotating device 5 along a vertical direction. The first guide member 2 and the second guide member 3 are interchangeably mounted on the gripper 1.

[0030] The fuel assembly loading guide 100 is used during reactor shutdown and refueling. When used during reactor shutdown and refueling, the fuel assembly loading guide 100 is positioned on the track of the refueling machine and above the core refueling pool inside the reactor's main building. The fuel assembly loading guide 100 can place two types of guides (first guide 2 and second guide 3) into the drainage holes of the lower core support plate adjacent to the location of the fuel assembly to be loaded. These two guides provide guidance and positioning for loading the fuel assembly.

[0031] According to an embodiment of the present invention, the fuel assembly loading guide device 100, by providing a gripper 1 and having a first guide member 2 and a second guide member 3 interchangeably disposed on the gripper 1, allows the gripper 1 to place the first guide member 2 and the second guide member 3 into the drainage holes of the core support lower plate, respectively. This eliminates the need for two rotating devices 5 and two lifting components, thereby simplifying the structure of the fuel assembly loading guide device 100 and reducing its manufacturing cost.

[0032] Furthermore, since there is no need to install two rotating devices 5, mutual interference and collision between the two rotating devices 5 can be avoided. This not only eliminates the need for components to prevent collisions between the two rotating devices 5 (such as hard limiters, laser rangefinders, etc.), but also eliminates the need to consider the issue of the two rotating devices 5 avoiding each other, making the rotating devices 5 and the fuel assembly loading and guiding device 100 easier to operate.

[0033] The fuel assembly loading and guiding device 100 according to an embodiment of the present invention has a simple structure, few parts, low manufacturing cost, and is easy to operate.

[0034] like Figure 1 As shown, the fuel assembly loading guide device 100 also includes a telescopic sleeve 7. The telescopic sleeve 7 includes a fixed sleeve 71 and a movable sleeve 72. The fixed sleeve 71 is disposed on the rotary device 5. The movable sleeve 72 is movably disposed on the fixed sleeve 71 in the vertical direction, and the gripper 1 is disposed on the movable sleeve 72.

[0035] The mobile platform 4 can move the first guide member 2 and the second guide member 3 along the first horizontal direction (X direction) via the rotary device 5, the telescopic sleeve 7, and the gripper 1. The rotary device 5 can also move the first guide member 2 and the second guide member 3 along the second horizontal direction (Y direction) via the telescopic sleeve 7 and the gripper 1. The rotary device 5 can also rotate the first guide member 2 and the second guide member 3 around the vertical direction (Z direction) via the telescopic sleeve 7 and the gripper 1. The telescopic sleeve 7 can move the first guide member 2 and the second guide member 3 along the vertical direction (Z direction) via the gripper 1.

[0036] In related technologies, ropes are used to place the guide component into the drainage holes of the lower plate of the reactor core support. Because the ropes are flexible, there is swaying between the ropes and the guide component during the process of releasing the ropes to lower the guide component, resulting in inaccurate positioning of the guide component, complex control, and high uncertainty.

[0037] By setting a rigid fixed cylinder 71 and a movable cylinder 72 (telescopic sleeve 7) and placing the gripper 1 on the movable cylinder 72, the first guide member 2 and the second guide member 3 can be placed in the water flow hole of the core support lower plate using the rigid movable cylinder 72.

[0038] Therefore, during the descent of the first guide member 2 and the second guide member 3, there is no shaking of the first guide member 2 and the second guide member 3, so that the first guide member 2 and the second guide member 3 can be accurately and quickly placed in the water flow hole of the core support lower plate, effectively improving the placement efficiency and accuracy of the first guide member 2 and the second guide member 3.

[0039] Up and down directions, such as Figure 1 As shown by arrow A in the diagram, the second horizontal direction is as follows: Figure 1 As shown by arrow B in the diagram.

[0040] like Figure 2 , Figure 3 and Figure 16 As shown, the first guide member 2 is switchably disposed on the gripper 1 and the moving platform 4, and the second guide member 3 is switchably disposed on the gripper 1 and the moving platform 4. Thus, when the first guide member 2 (second guide member 3) is not in use, the first guide member 2 (second guide member 3) can be placed on the moving platform 4, so that when the first guide member 2 (second guide member 3) is needed, the gripper 1 can easily grasp the first guide member 2 (second guide member 3).

[0041] like Figure 2 , Figure 3 and Figure 16 As shown, the mobile platform 4 includes a first mounting bracket 41 and a second mounting bracket 42. The first guide member 2 is switchably disposed on the gripper 1 and the first mounting bracket 41, and the second guide member 3 is switchably disposed on the gripper 1 and the second mounting bracket 42. By setting the first mounting bracket 41 and the second mounting bracket 42, it is not only convenient to place the first guide member 2 and the second guide member 3 and to facilitate the gripper 1 to grasp the first guide member 2 and the second guide member 3, but also to prevent the first guide member 2 and the second guide member 3 from interfering with other components.

[0042] Optionally, the first mounting bracket 41 includes a first limiting part, and the first guide member 2 includes a second limiting part, which can cooperate with the first limiting part. This allows the first guide member 2 to be accurately and securely placed on the first mounting bracket 41.

[0043] Optionally, one of the first limiting part and the second limiting part is a first limiting hole that extends vertically, and the other of the first limiting part and the second limiting part is a first limiting protrusion that can fit into the first limiting hole. This allows the first limiting part and the second limiting part to fit together more conveniently, more accurately, and more securely, thereby allowing the first guide member 2 to be placed more conveniently, more accurately, and more securely on the first mounting bracket 41.

[0044] Optionally, the first limiting part is a first limiting hole, which extends through the first mounting bracket 41 in the vertical direction. The second limiting part is a first limiting protrusion, and the positioning pin of the first guide member 2 constitutes the second limiting part (first limiting protrusion). The positioning pin of the first guide member 2 can be engaged with the drainage hole of the core support lower plate.

[0045] like Figure 2As shown, the fuel assembly loading guide device 100 also includes a first pressing member 61, which can cooperate with the first guide member 2 to press the first guide member 2 onto the first mounting frame 41. This allows the first guide member 2 to be placed more securely on the first mounting frame 41, thereby preventing the first guide member 2 from falling off the first mounting frame 41 and making it easier for the gripper 1 to grasp the first guide member 2.

[0046] Optionally, the first pressing member 61 includes a first pressing portion 611, which is movably disposed in a first pressing position and a first retracted position along a horizontal direction. The first pressing portion 611 located in the first pressing position can cooperate with the first guide member 2 to apply a horizontal pressing force to the first guide member 2.

[0047] For example, the first pressing member 61 can be a cylinder or a hydraulic cylinder, and the first pressing part 611 can be a pressing plate connected to the piston of the first pressing member 61. The first pressing part 611, located in the first pressing position, applies a first horizontal pressing force to the first guide member 2.

[0048] When the first guide member 2 is not in use, the first guide member 2 can be placed on the first mounting bracket 41, and the second limiting part of the first guide member 2 cooperates with the first limiting part of the first mounting bracket 41. Then, the first pressing part 611 of the first pressing member 61 moves from the first retracted position to the first pressing position, so that the first pressing part 611 abuts against the first guide member 2 and applies a horizontal pressing force to the first guide member 2.

[0049] When the first guide member 2 is placed in the water flow hole of the lower plate of the core support, the gripper 1 grips the first guide member 2. Then, the first pressing part 611 of the first pressing member 61 moves from the first pressing position to the first retracted position so that the first pressing part 611 disengages from the first guide member 2. At this time, the gripper 1 can remove the first guide member 2 so that the first guide member 2 disengages from the first mounting bracket 41.

[0050] Optionally, the second mounting bracket 42 includes a third limiting part, and the second guide member 3 includes a fourth limiting part, which can cooperate with the third limiting part. This allows the second guide member 3 to be accurately and securely placed in the second mounting bracket 42.

[0051] Optionally, one of the third and fourth limiting portions is a second limiting hole extending vertically, and the other of the third and fourth limiting portions is a second limiting protrusion, which can fit into the second limiting hole. This allows the third and fourth limiting portions to fit together more conveniently, accurately, and securely, thereby allowing the second guide member 3 to be placed more conveniently, accurately, and securely on the second mounting bracket 42.

[0052] Optionally, the third limiting part is the second limiting hole, which extends through the second mounting bracket 42 in the vertical direction. The fourth limiting part is the second limiting protrusion, and the positioning pin of the second guide member 3 constitutes the fourth limiting part (second limiting protrusion). The positioning pin of the second guide member 3 can be engaged with the drainage hole of the core support lower plate.

[0053] like Figure 3 As shown, the fuel assembly loading guide device 100 also includes a second pressing member 62, which cooperates with the second guide member 3 to press the second guide member 3 against the second mounting bracket 42. This allows the second guide member 3 to be placed more securely on the second mounting bracket 42, thereby preventing the second guide member 3 from falling off the second mounting bracket 42 and making it easier for the gripper 1 to grasp the second guide member 3.

[0054] Optionally, the second pressing member 62 includes a second pressing portion 621, which is movably disposed in a second pressing position and a second retracted position along a horizontal direction. The second pressing portion 621 located in the second pressing position can cooperate with the second guide member 3 to apply a horizontal pressing force to the second guide member 3.

[0055] For example, the second pressing member 62 can be a pneumatic cylinder or a hydraulic cylinder, and the second pressing part 621 can be a pressing plate connected to the piston of the second pressing member 62. The second pressing part 621, located in the second pressing position, applies a first horizontal pressing force to the second guide member 3.

[0056] When the second guide member 3 is not in use, it can be placed on the second mounting bracket 42, with the fourth limiting portion of the second guide member 3 engaging with the third limiting portion of the second mounting bracket 42. Then, the second pressing portion 621 of the second pressing member 62 moves from the second retracted position to the second pressing position, so that the second pressing portion 621 abuts against the second guide member 3 and applies a horizontal pressing force to the second guide member 3.

[0057] When the second guide member 3 is placed in the water flow hole of the lower plate of the core support, the gripper 1 grips the second guide member 3. Then, the second pressing part 621 of the second pressing member 62 moves from the second pressing position to the second retracted position so that the second pressing part 621 disengages from the second guide member 3. At this time, the gripper 1 can remove the second guide member 3 so that the second guide member 3 disengages from the second mounting bracket 42.

[0058] like Figures 4-12 As shown, the gripper 1 includes a body 11 and a gripping hook 12, which is movably disposed on the body 11 between an extended position and a retracted position. When the gripping hook 12 is in the extended position, it can grip the first guide member 2 and the second guide member 3, and when the gripping hook 12 is in the retracted position, it can disengage from the first guide member 2 and the second guide member 3.

[0059] When the gripper 1 grips the first guide member 2 (second guide member 3), the hook 12 moves from the retracted position to the extended position so that the hook 12 grips the first guide member 2 (second guide member 3); when the gripper 1 releases the first guide member 2 (second guide member 3), the hook 12 moves from the extended position to the retracted position so that the hook 12 disengages from the first guide member 2 (second guide member 3).

[0060] By providing a movable hook 12 on the body 11 of the gripper 1 between the extended position and the retracted position, the gripper 1 can more easily and more firmly grasp the first guide member 2 and the second guide member 3, and more easily release (detach) the first guide member 2 and the second guide member 3.

[0061] like Figures 2-12 as well as Figure 17 As shown, the first guide member 2 includes a first body 22 and a first gripping part 23, with the first gripping part 23 disposed on the first body 22. The second guide member 3 includes a second body 32 and a second gripping part 33, with the second gripping part 33 disposed on the second body 32. The hook 12 in the extended position can cooperate with the first gripping part 23 and the second gripping part 33 to grip the first guide member 2 and the second guide member 3, and the hook 12 in the retracted position can disengage from the first gripping part 23 and the second gripping part 33.

[0062] By setting the first gripping part 23 and the second gripping part 33, the gripper 1 can grip the first guide member 2 and the second guide member 3 more easily and more firmly.

[0063] like Figure 4 As shown, the gripper 1 also includes a reset elastic element 13. One end of the reset elastic element 13 engages with the body 11 (e.g., connected), and the other end of the reset elastic element 13 engages with the hook 12 (e.g., connected). When the hook 12 is in the retracted position, the reset elastic element 13 is in a deformed state to apply a spring force to the hook 12, causing it to move to the extended position. When the hook 12 is in the extended position, the reset elastic element 13 is in a deformed state or a natural state.

[0064] By setting the reset elastic element 13, not only can the gripper 12 automatically move from the retracted position to the extended position, but the gripper 12 can also stay more stably in the extended position, so that the gripper 1 can more firmly grasp the first guide 2 and the second guide 3.

[0065] like Figures 4-12 as well as Figure 17As shown, the main body 11 includes a hook mounting portion 111, and a hook 12 is movably mounted on the hook mounting portion 111 between an extended position and a retracted position along a preset direction. The hook 12 includes an inclined surface 121, which can cooperate with the first guide member 2 and the second guide member 3. The upper edge 122 of the inclined surface 121 is away from the hook mounting portion 111 relative to the lower edge 123 of the inclined surface 121 in a preset direction. The preset direction is as follows: Figure 4 As shown by arrow C in the diagram.

[0066] When the gripper 1 grips the first guide member 2 (second guide member 3), the gripper 1 moves downward. After the inclined surface 121 of the hook 12 contacts the first guide member 2 (second guide member 3), the gripper 1 continues to move downward. For example, the inclined surface 121 of the hook 12 contacts the first gripping part 23 of the first guide member 2 (the second gripping part 33 of the second guide member 3).

[0067] As the upper edge 122 of the inclined plane 121 moves away from the hook mounting portion 111 relative to the lower edge 123 of the inclined plane 121 in a preset direction, as the gripper 1 (inclined plane 121) continues to move downward, the first guide member 2 (second guide member 3) pushes the hook 12 to retract along the preset direction, so that the hook 12 moves from the extended position to the retracted position along the preset direction. At the same time, the hook 12 compresses the reset elastic member 13 so that the reset elastic member 13 is in a deformed state (e.g., a compressed state).

[0068] When the gripper 1 moves downward past the first guide member 2 (second guide member 3), for example, when the gripper hook 12 moves downward past the first gripping part 23 of the first guide member 2 (second gripping part 33 of the second guide member 3), the inclined surface 121 of the gripper hook 12 disengages from the first guide member 2 (second guide member 3). Under the action of the reset elastic member 13, the gripper hook 12 moves to the extended position along the preset direction so that the gripper hook 12 hooks the first guide member 2 (second guide member 3), for example, the gripper hook 12 hooks the first gripping part 23 of the first guide member 2 (second gripping part 33 of the second guide member 3), thereby completing the gripping of the first guide member 2 (second guide member 3).

[0069] like Figures 4-12 As shown, the gripper 1 also includes a buffer assembly 14, which includes a pressing member 141 and a pressing elastic member 142. The pressing member 141 is movably disposed on the body 11 in the vertical direction and is located above the gripping hook 12. The pressing member 141 and the gripping hook 12 can clamp the first guide member 2 and the second guide member 3. For example, the pressing member 141 and the gripping hook 12 can clamp the first gripping part 23 of the first guide member 2, and the pressing member 141 and the gripping hook 12 can also clamp the second gripping part 33 of the second guide member 3.

[0070] One end of the pressing elastic member 142 is engaged with the body 11 (e.g., connected), and the other end of the pressing elastic member 142 is engaged with the pressing member 141 (e.g., connected), so that the pressing elastic member 142 can apply a downward elastic force to the pressing member 141, and the pressing member 141 can apply a downward force to the first guide member 2 (first gripping part 23) and the second guide member 3 (second gripping part 33).

[0071] When the gripper 1 grabs the first guide member 2 (second guide member 3), the gripper 1 moves from top to bottom. After the inclined surface 121 of the hook 12 contacts the first guide member 2 (second guide member 3), the first guide member 2 (second guide member 3) pushes the hook 12 to move from the extended position to the retracted position along a preset direction.

[0072] Subsequently, the pressing member 141 comes into contact with the first guide member 2 (second guide member 3). Moreover, as the gripper 1 moves downward, the distance between the pressing member 141 and the gripper hook 12 in the vertical direction increases, and the deformation of the pressing elastic member 142 increases (for example, the pressing elastic member 142 is continuously compressed), so that the pressing elastic member 142 applies a downward force to the first guide member 2 (second guide member 3) through the pressing member 141.

[0073] When the gripper 1 moves downward past the first guide member 2 (second guide member 3), the gripping hook 12 moves to the extended position along the preset direction. At this time, the gripping hook 12 and the pressing member 141 clamp the first guide member 2 (second guide member 3), thereby completing the gripping of the first guide member 2 (second guide member 3).

[0074] By including a buffer assembly 14 in the gripper 1, the first guide 2 and the second guide 3 can be clamped by the pressure member 141 and the hook 12 of the buffer assembly 14.

[0075] like Figures 4-12 As shown, the body 11 has a through hole extending vertically, and the pressing member 141 includes a rod portion 1411, an anti-detachment portion 1412, and a pressing portion 1413. The rod portion 1411 is movably fitted into the through hole in the vertical direction. The anti-detachment portion 1412 is connected to the upper end of the rod portion 1411 and is located above the through hole to prevent the rod portion 1411 from moving downward and disengaging from the through hole.

[0076] The lower end of the pressing part 1413 is connected to the lower end of the rod part 1411, and the pressing part 1413 is located above the gripper hook 12. The pressing part 1413 and the gripper hook 12 can clamp the first guide member 2 and the second guide member 3. For example, the pressing part 1413 and the gripper hook 12 can clamp the first gripping part 23 of the first guide member 2, and the pressing part 1413 and the gripper hook 12 can also clamp the second gripping part 33 of the second guide member 3.

[0077] The upper end of the pressing elastic element 142 engages with (e.g., is connected to) the body 11, and the lower end of the pressing elastic element 142 engages with (e.g., is connected to) at least one of the rod portion 1411 and the pressing portion 1413. After the gripper 1 grips the first guide member 2 (second guide member 3), the pressing elastic element 142 is in a compressed state so that the pressing elastic element 142 applies a downward force to the first guide member 2 (second guide member 3) through the pressing portion 1413. This makes the structure of the gripper 1 more reasonable.

[0078] When the gripper 1 grabs the first guide member 2 (second guide member 3), after the pressing part 1413 comes into contact with the first guide member 2 (second guide member 3), as the gripper 1 (body 11, gripping hook 12) moves downward, the pressing part 1413 and the rod part 1411 remain stationary, thereby increasing the distance between the pressing part 1413 and the gripping hook 12 in the vertical direction, and the pressing elastic member 142 is continuously compressed.

[0079] like Figures 4-12 as well as Figure 17 As shown, the first guide member 2 also includes a first unlocking part 24, which is disposed on the first body 22 and located below the first gripping part 23. The edge 241 of the first unlocking part 24 is located outside the edge 231 of the first gripping part 23, and the edge 241 of the first unlocking part 24 can cooperate with the hook 12 (e.g., inclined surface 121) to push the hook 12 from the extended position to the retracted position.

[0080] The second guide member 3 also includes a second unlocking part 34, which is disposed on the second main body 32 and located below the second gripping part 33. The edge 341 of the second unlocking part 34 is located outside the edge 331 of the second gripping part 33, and the edge 341 of the second unlocking part 34 can cooperate with the hook 12 (e.g., inclined surface 121) to push the hook 12 from the extended position to the retracted position.

[0081] After placing the first guide 2 (second guide 3) on the water flow hole of the core support lower plate or the moving platform 4, the gripper 1 can be disengaged from the first guide 2 (second guide 3).

[0082] When it is necessary to disengage the gripper 1 from the first guide member 2 (second guide member 3), the gripper 1 is moved downward. After the gripper hook 12 of the gripper 1 comes into contact with the first unlocking part 24 (second unlocking part 34), the first unlocking part 24 (second unlocking part 34) pushes the gripper hook 12 to retract, so that the gripper hook 12 moves from the extended position to the retracted position.

[0083] Since the edge 241 of the first unlocking part 24 (the edge 341 of the second unlocking part 34) is located outside the edge 231 of the first gripping part 23 (the edge 331 of the second gripping part 33), the first unlocking part 24 (the second unlocking part 34) can push the hook 12 to the outside of the edge 231 of the first gripping part 23 (the edge 331 of the second gripping part 33). Subsequently, the gripper 1 is moved upward. Since the hook 12 is located outside the edge 231 of the first gripping part 23 (the edge 331 of the second gripping part 33), the hook 12 no longer hooks the first gripping part 23 (the second gripping part 33), thereby allowing the gripper 1 to disengage from the first guide member 2 (the second guide member 3).

[0084] By providing the first unlocking part 24 and the second unlocking part 34, the gripper 1 can be easily and reliably disengaged from the first guide member 2 and the second guide member 3. Moreover, by simply moving the gripper hook 12 of the gripper 1 downward to the positions of the first unlocking part 24 and the second unlocking part 34, the gripper 1 can be disengaged from the first guide member 2 and the second guide member 3 by moving the gripper 1 upward, thus eliminating the need to operate the first guide member 2 and the second guide member 3. This simplifies the disengagement process and prevents interference with or influence on the first guide member 2 and the second guide member 3.

[0085] Optionally, when it is necessary to disengage the gripper 1 from the first guide member 2 (second guide member 3), the gripper 1 is moved downward. After the inclined surface 121 of the gripper hook 12 contacts the first unlocking part 24 (second unlocking part 34), the gripper 1 continues to move downward. Since the upper edge 122 of the inclined surface 121 is farther away from the gripper hook mounting part 111 in a preset direction relative to the lower edge 123 of the inclined surface 121, as the gripper 1 (inclined surface 121) continues to move downward, the first unlocking part 24 (second unlocking part 34) pushes the gripper hook 12 to retract along the preset direction, so that the gripper hook 12 moves from the extended position to the retracted position along the preset direction.

[0086] When the inclined surface 121 of the hook 12 moves downward past the first unlocking part 24 (second unlocking part 34), the hook 12 is located outside the edge 231 of the first gripping part 23 (edge ​​331 of the second gripping part 33), and the gripper 1 moves upward so that the gripper 1 disengages from the first guide member 2 (second guide member 3).

[0087] The gripper 1 of the fuel assembly loading and guiding device 100 does not require external power (such as power supply, air supply, etc.). It can grasp and detach from the first guide member 2 and the second guide member 3 by relying only on its own structure, thus avoiding the underwater arrangement of electric components, pneumatic components, etc.

[0088] like Figures 4-12 as well as Figure 17As shown, both the first gripping part 23 and the second gripping part 33 are cylindrical, and both the first unlocking part 24 and the second unlocking part 34 are frustoconical. The diameter of the upper surface of the first unlocking part 24 is larger than the diameter of the first gripping part 23, and the diameter of the upper surface of the second unlocking part 34 is larger than the diameter of the second gripping part 33. This makes the structure of the first guide member 2 and the second guide member 3 more reasonable, allowing the gripper 1 to grip and detach from the first guide member 2 and the second guide member 3 more conveniently and reliably.

[0089] like Figures 4-12 As shown, the gripper 1 includes a plurality of gripping hooks 12, which are spaced apart on the body 11 along a predetermined circumferential direction. The predetermined circumferential direction can be aligned with the circumferential direction of each of the first gripping part 23, the second gripping part 33, the first unlocking part 24, and the second unlocking part 34. This allows the gripper 1 to grip the first guide member 2 and the second guide member 3 more securely and to disengage from the first guide member 2 and the second guide member 3 more reliably.

[0090] Accordingly, the gripper 1 includes a plurality of reset elastic elements 13, one end of each reset elastic element 13 is engaged with the body 11 (e.g., connected), and the other ends of the plurality of reset elastic elements 13 are engaged with a plurality of gripping hooks 12 (e.g., connected).

[0091] like Figure 4 and Figure 5 As shown, the first guide member 2 includes one of a positioning hole and a positioning post 15, the second guide member 3 includes one of a positioning hole and a positioning post 15, and the gripper 1 includes the other of a positioning hole and a positioning post 15. Both the positioning hole and the positioning post 15 extend vertically, and the positioning post 15 can fit into the positioning hole. This allows the gripper 1 to grip the first guide member 2 and the second guide member 3 more accurately and easily.

[0092] When the gripper 1 grasps the first guide member 2 (second guide member 3), before the gripping hook 12 contacts the first guide member 2 (second guide member 3), the positioning pin 15 engages in the positioning hole, thereby completing the basic positioning of the gripper 1 and the first guide member 2 (second guide member 3) to ensure that the first guide member 2 (second guide member 3) is fixed relative to the gripper 1. Then, the gripper 1 continues to descend to complete the grasping of the first guide member 2 (second guide member 3).

[0093] Optionally, the first guide member 2 includes a plurality of positioning holes spaced apart, the second guide member 3 includes a plurality of positioning holes spaced apart, and the gripper 1 includes a plurality of positioning posts 15 spaced apart. The plurality of positioning posts 15 can be fitted one-to-one into the plurality of positioning holes.

[0094] This effectively prevents the first guide 2 and the second guide 3 from rotating during the transfer and placement into the drainage holes of the core support lower plate, thus allowing the first guide 2 and the second guide 3 to be placed smoothly, accurately, and quickly into the drainage holes of the core support lower plate, effectively improving the placement efficiency and accuracy of the first guide 2 and the second guide 3.

[0095] Optionally, the first guide member 2 includes a first magnetic attraction part, and the second guide member 3 includes a second magnetic attraction part. Therefore, in extreme cases where the gripper 1 fails to grasp the first guide member 2 or the second guide member 3, the first guide member 2 and the second guide member 3 can be manually lifted out of the water tank by using a steel wire rope to suspend the magnet. Both the first and second magnetic attraction parts can be made of carbon steel.

[0096] like Figures 13-15 As shown, the fuel assembly loading guide device 100 includes an adaptive adjustment component 8, which includes a body 81, a first moving member 82, a first resetting member 83, a second moving member 84, and a second resetting member 85.

[0097] The main body 81 is mounted on the movable cylinder 72 so that the movable cylinder 72 can drive the main body 81 and the adaptive adjustment component 8 to move up and down. A first movable member 82 is movably mounted on the main body 81 along a first preset horizontal direction. A first reset member 83 cooperates with both the main body 81 and the first movable member 82 to drive the first movable member 82 to reset in the first preset horizontal direction. A second movable member 84 is movably mounted on the first movable member 82 along a second preset horizontal direction, which is perpendicular to the first preset horizontal direction. A second reset member 85 cooperates with both the first movable member 82 and the second movable member 84 to drive the second movable member 84 to reset in the second preset horizontal direction. A gripper 1 is mounted on the second movable member 84, thereby allowing the gripper 1 and the first guide member 2 (second guide member 3) to move along both the first and second preset horizontal directions.

[0098] By setting a first movable member 82 that can move along a first preset horizontal direction and a second movable member 84 that can move along a second preset horizontal direction, and by placing the gripper 1 on the second movable member 84, the gripper 1 and the first guide member 2 (second guide member 3) can move along the first preset horizontal direction and the second preset horizontal direction.

[0099] When placing the first guide member 2 and the second guide member 3 into the drainage holes of the core support lower plate, if there is a deviation between the positions of the first guide member 2 and the second guide member 3 and the positions of the drainage holes, the deviation can be eliminated by moving the first moving member 82 along the first preset horizontal direction and / or the second moving member 84 along the second preset horizontal direction. The deviation can also be eliminated through the adjustment function of the adaptive adjustment component 8. This allows the first guide member 2 and the second guide member 3 to be placed smoothly, accurately, and quickly into the drainage holes of the core support lower plate, effectively improving the placement efficiency and accuracy of the first guide member 2 and the second guide member 3.

[0100] After the first guide member 2 and the second guide member 3 are placed in the drainage holes of the core support lower plate, if the first moving member 82 and the second moving member 84 move, the first moving member 82 can be reset by the action of the first reset member 83, and the second moving member 84 can be reset by the action of the second reset member 85. The first preset horizontal direction can be consistent with one of the first horizontal direction and the second horizontal direction, and the second preset horizontal direction can be consistent with the other of the first horizontal direction and the second horizontal direction.

[0101] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0102] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0103] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0104] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0105] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0106] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fuel assembly loading and guiding device, characterized in that, include: A mobile platform, which is movably disposed along a first horizontal direction; A rotary device is movably mounted on the moving platform along a second horizontal direction, the second horizontal direction being perpendicular to the first horizontal direction; A gripper, which is movably disposed on the rotary device in the vertical direction; as well as A first guide and a second guide, which are alternatively disposed on the gripper.

2. The fuel assembly loading and guiding device according to claim 1, characterized in that, The first guide member is switchably disposed on the gripper and the moving platform, and the second guide member is switchably disposed on the gripper and the moving platform.

3. The fuel assembly loading and guiding device according to claim 2, characterized in that, The mobile platform includes a first mounting frame and a second mounting frame. The first guide member is switchably disposed on the gripper and the first mounting frame, and the second guide member is switchably disposed on the gripper and the second mounting frame. The first mounting bracket includes a first limiting part, and the first guide includes a second limiting part, the second limiting part being capable of cooperating with the first limiting part; or The fuel assembly loading and guiding device further includes a first pressing member, which cooperates with the first guide member to press the first guide member against the first mounting bracket; or The second mounting bracket includes a third limiting part, and the second guide includes a fourth limiting part, the fourth limiting part being capable of cooperating with the third limiting part; or The fuel assembly loading guide device further includes a second pressing member, which can cooperate with the second guide member to press the second guide member onto the second mounting bracket.

4. The fuel assembly loading and guiding device according to claim 3, characterized in that, One of the first limiting portion and the second limiting portion is a first limiting hole extending in the vertical direction, and the other of the first limiting portion and the second limiting portion is a first limiting protrusion that can fit into the first limiting hole; or The first pressing member includes a first pressing part, which is movably disposed in a first pressing position and a first retracted position along the horizontal direction. The first pressing part located in the first pressing position can cooperate with the first guide member to apply a horizontal pressing force to the first guide member. or One of the third limiting portion and the fourth limiting portion is a second limiting hole that extends through in the vertical direction, and the other of the third limiting portion and the fourth limiting portion is a second limiting protrusion that can fit into the second limiting hole; or The second pressing member includes a second pressing part, which is movably disposed in a second pressing position and a second retracted position along the horizontal direction. The second pressing part located in the second pressing position can cooperate with the second guide member to apply a horizontal pressing force to the second guide member.

5. The fuel assembly loading and guiding device according to claim 1, characterized in that, The gripper includes a body and a hook. The hook is movably disposed on the body between an extended position and a retracted position. When the hook is in the extended position, it can grip the first guide and the second guide. When the hook is in the retracted position, it can disengage from the first guide and the second guide.

6. The fuel assembly loading and guiding device according to claim 5, characterized in that, The gripper also includes a reset elastic element, one end of which engages with the body and the other end of which engages with the gripping hook. When the gripping hook is in the retracted position, the reset elastic element is in a deformed state to apply a spring force to the gripping hook to move it to the extended position. When the gripping hook is in the extended position, the reset elastic element is in a deformed state or a natural state.

7. The fuel assembly loading and guiding device according to claim 5, characterized in that, The main body includes a hook mounting part, the hook being movably disposed on the hook mounting part between the extended position and the retracted position along a preset direction, the hook including an inclined surface, the inclined surface being able to cooperate with the first guide member and the second guide member, the upper edge of the inclined surface being farther away from the hook mounting part relative to the lower edge of the inclined surface in the preset direction.

8. The fuel assembly loading and guiding device according to claim 5, characterized in that, The gripper also includes a buffer assembly, which comprises: A pressing member, movably disposed on the body in a vertical direction, is located above the gripper hook. The pressing member and the gripper hook are capable of clamping the first guide member and the second guide member; and A downward elastic element is provided, one end of which engages with the body and the other end of which engages with the downward pressing member, so that the downward elastic element can apply a downward elastic force to the downward pressing member.

9. The fuel assembly loading and guiding device according to claim 8, characterized in that, The body has a through hole extending in the vertical direction, and the pressing member includes: A rod portion, which is movably fitted into the through hole in the vertical direction; An anti-detachment part, which is connected to the upper end of the rod, is located above the through hole; and The pressing part is connected to the lower end of the rod and is located above the gripper hook. The pressing part and the gripper hook are capable of clamping the first guide member and the second guide member. The upper end of the pressing elastic member cooperates with the body and the lower end of the pressing elastic member cooperates with at least one of the rod and the pressing part.

10. The fuel assembly loading and guiding device according to claim 5, characterized in that, The first guide member includes a first body and a first gripping part, the first gripping part being disposed on the first body. The second guide member includes a second body and a second gripping part, the second gripping part being disposed on the second body. The hook in the extended position can cooperate with the first gripping part and the second gripping part to grip the first guide member and the second guide member. The hook in the retracted position can disengage from the first gripping part and the second gripping part.

11. The fuel assembly loading and guiding device according to claim 10, characterized in that, The gripper also includes a buffer assembly, which comprises: A pressing member, movably disposed on the body in a vertical direction, is located above the gripper hook. The pressing member and the gripper hook are capable of clamping the first gripping part and the second gripping part; and A downward elastic element is provided, one end of which engages with the body and the other end of which engages with the downward pressing member, so that the downward elastic element can apply a downward elastic force to the downward pressing member.

12. The fuel assembly loading and guiding device according to claim 10, characterized in that, The first guide further includes a first unlocking part, which is disposed on the first body and located below the first gripping part. The edge of the first unlocking part is located outside the edge of the first gripping part. The edge of the first unlocking part can cooperate with the gripping hook to push the gripping hook from the extended position to the retracted position. The second guide also includes a second unlocking part, which is disposed on the second body and located below the second gripping part. The edge of the second unlocking part is located outside the edge of the second gripping part. The edge of the second unlocking part can cooperate with the gripping hook to push the gripping hook from the extended position to the retracted position.

13. The fuel assembly loading and guiding device according to claim 12, characterized in that, Both the first gripping part and the second gripping part are cylindrical, and both the first unlocking part and the second unlocking part are frustum-shaped. The diameter of the upper surface of the first unlocking part is larger than the diameter of the first gripping part, and the diameter of the upper surface of the second unlocking part is larger than the diameter of the second gripping part; or The gripper includes a plurality of gripping hooks, which are spaced apart on the body along a predetermined circumferential direction. This predetermined circumferential direction can coincide with the circumferential direction of each of the first gripping part, the second gripping part, the first unlocking part, and the second unlocking part; or The first guide member includes one of a positioning hole and a positioning post; the second guide member includes the positioning hole and the positioning post; the gripper includes the positioning hole and the positioning post, both extending vertically, and the positioning post can be fitted into the positioning hole; or The first guide member includes a first magnetic attraction portion, and the second guide member includes a second magnetic attraction portion.

14. The fuel assembly loading and guiding device according to any one of claims 1-13, characterized in that, It also includes a telescopic sleeve, the telescopic sleeve comprising: A fixed cylinder, wherein the fixed cylinder is disposed on the rotary device; and A movable cylinder is movably disposed on the fixed cylinder in the vertical direction, and the gripper is disposed on the movable cylinder.

15. A guide assembly for a fuel assembly loading guide device, characterized in that, It includes a gripper, a first guide member, and a second guide member, wherein the first guide member and the second guide member are alternatively disposed on the gripper.

16. The guide assembly of the fuel assembly loading guide device according to claim 15, characterized in that, The gripper includes a body and a gripping hook, which is movably disposed on the body between an extended position and a retracted position. The first guide includes a first main body and a first gripping part, with the first gripping part disposed on the first main body. The second guide includes a second main body and a second gripping part, with the second gripping part disposed on the second main body. The gripping hook in the extended position can cooperate with the first gripping part and the second gripping part to grip the first guide and the second guide. The gripping hook in the retracted position can disengage from the first gripping part and the second gripping part.

17. The guide assembly of the fuel assembly loading guide device according to claim 16, characterized in that, The gripper also includes a buffer assembly, which comprises: A pressing member, movably disposed on the body in a vertical direction, is located above the gripper hook. The pressing member and the gripper hook are capable of clamping the first gripping part and the second gripping part; and A downward elastic element is provided, one end of which engages with the body and the other end of which engages with the downward pressing member, so that the downward elastic element can apply a downward elastic force to the downward pressing member.

18. The guide assembly of the fuel assembly loading guide device according to claim 16, characterized in that, The first guide further includes a first unlocking part, which is disposed on the first body and located below the first gripping part. The edge of the first unlocking part is located outside the edge of the first gripping part. The edge of the first unlocking part can cooperate with the gripping hook to push the gripping hook from the extended position to the retracted position. The second guide also includes a second unlocking part, which is disposed on the second body and located below the second gripping part. The edge of the second unlocking part is located outside the edge of the second gripping part. The edge of the second unlocking part can cooperate with the gripping hook to push the gripping hook from the extended position to the retracted position.

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