Fuel assembly loading guide apparatus and telescoping sleeve assembly therefor

Abstract

The application discloses a fuel assembly loading guide device and a telescopic sleeve assembly thereof, and belongs to the technical field of nuclear power. The telescopic sleeve assembly of the fuel assembly loading guide device comprises a fixed cylinder, an intermediate telescopic cylinder movably arranged in the fixed cylinder along the length direction of the fixed cylinder and located at the inner side of the fixed cylinder, a terminal telescopic cylinder movably arranged in the intermediate telescopic cylinder along the length direction of the fixed cylinder and located at the inner side of the intermediate telescopic cylinder, a rope, one part of the rope extending into the inner side of the fixed cylinder and connected with the terminal telescopic cylinder, and a guide piece arranged in the terminal telescopic cylinder. The telescopic sleeve assembly of the fuel assembly loading guide device can accurately and quickly place the guide piece in the flow hole of the core support lower plate, and effectively improves the placement efficiency and accuracy of the guide piece. The application solves the problem of the shaking of the guide piece when the guide piece is lowered by using a steel wire rope.

Description

Technical Field

[0001] This invention relates to the field of nuclear power technology, and more specifically, to a fuel assembly loading and guiding device and its telescopic sleeve assembly. 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] Patent application CN120878317A discloses an automatic positioning fuel assembly loading and guiding device. This device includes an operating platform with a mounting bracket. The mounting bracket has at least one lifting mechanism, which includes a lifting device, a rotating device, and a traveling device.

[0004] A steel wire rope is connected to the lifting device, and a guide head is provided at the end of the steel wire rope away from the lifting device. The lifting device adjusts the height of the guide head via the steel wire rope, a rotating device is used to adjust the deflection angle of the guide head, and a traveling device is used to adjust the position of the guide head along a second direction.

[0005] Because the wire rope is flexible and the guide head descends a long distance, the wire rope and guide head sway during the descent, resulting in inaccurate positioning of the guide head, complex control, and high uncertainty. Summary of the Invention

[0006] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a fuel assembly loading and guiding device and its telescopic sleeve assembly.

[0007] The telescopic sleeve assembly of the fuel loading guide device of the present invention includes: a fixed sleeve; an intermediate telescopic sleeve movably disposed on the fixed sleeve along the length direction of the fixed sleeve and located inside the fixed sleeve; an end telescopic sleeve movably disposed on the intermediate telescopic sleeve along the length direction of the fixed sleeve and located inside the intermediate telescopic sleeve; a rope, a portion of which extends into the inside of the fixed sleeve and is connected to the end telescopic sleeve; and a guide member disposed on the end telescopic sleeve.

[0008] Optionally, the telescopic sleeve assembly of the fuel loading guide device further includes: a first rope guide wheel, the first rope guide wheel being disposed on the outer peripheral surface of the fixed cylinder, a first portion of the rope being wound around the first rope guide wheel, the first rope guide wheel being located radially between the first portion of the rope and the fixed cylinder; and a second rope guide wheel, the second rope guide wheel being disposed at the top of the fixed cylinder, the rope being passed around the second rope guide wheel to change its extension direction.

[0009] Optionally, the end telescopic cylinder is provided with a first retractable portion, which extends outward from the end telescopic cylinder and can cooperate with the intermediate telescopic cylinder to drive the intermediate telescopic cylinder to retract.

[0010] Optionally, there are multiple intermediate telescopic cylinders, including a primary intermediate telescopic cylinder and a secondary intermediate telescopic cylinder. The primary intermediate telescopic cylinder is movably disposed within the fixed cylinder along its length and located inside the fixed cylinder. The secondary intermediate telescopic cylinder is movably disposed within the primary intermediate telescopic cylinder along its length and located inside the primary intermediate telescopic cylinder. The end telescopic cylinder is movably disposed within the secondary intermediate telescopic cylinder along its length and located inside the secondary intermediate telescopic cylinder. A first retractable portion is disposed at the bottom of the end telescopic cylinder and extends outward from the end telescopic cylinder, and the first retractable portion can engage with the bottom surface of the secondary intermediate telescopic cylinder. A second retractable portion is disposed at the bottom of the secondary intermediate telescopic cylinder and extends outward from the secondary intermediate telescopic cylinder, and the second retractable portion can engage with the bottom surface of the primary intermediate telescopic cylinder. Alternatively, the first retractable portion is disposed at the bottom of the end telescopic cylinder and extends outward from the end telescopic cylinder, and the first retractable portion can engage with both the bottom surfaces of the secondary intermediate telescopic cylinder and the bottom surface of the primary intermediate telescopic cylinder.

[0011] Optionally, the fixed cylinder is provided with one of a first guide rail and a first guide wheel, and the intermediate telescopic cylinder is provided with the other of the first guide rail and the first guide wheel. The first guide rail extends along the length direction of the fixed cylinder, and the first guide wheel cooperates with the first guide rail. The intermediate telescopic cylinder is provided with one of a second guide rail and a second guide wheel, and the end telescopic cylinder is provided with the other of the second guide rail and the second guide wheel. The second guide rail extends along the length direction of the fixed cylinder, and the second guide wheel cooperates with the second guide rail.

[0012] Optionally, the first guide wheel includes a first sub-wheel and a second sub-wheel, the first sub-wheel and the second sub-wheel being spaced apart in the circumferential direction of the fixed cylinder, the dimension of the first guide rail in the circumferential direction of the fixed cylinder decreasing from the inside to the outside, the first guide rail being located between the first sub-wheel and the second sub-wheel in the circumferential direction of the fixed cylinder, and the first guide rail cooperating with each of the first sub-wheel and the second sub-wheel; the second guide wheel includes a third sub-wheel and a fourth sub-wheel, the third sub-wheel and the fourth sub-wheel being spaced apart in the circumferential direction of the fixed cylinder, the dimension of the second guide rail in the circumferential direction of the fixed cylinder decreasing from the inside to the outside, the second guide rail being located between the third sub-wheel and the fourth sub-wheel in the circumferential direction of the fixed cylinder, and the second guide rail cooperating with each of the third sub-wheel and the fourth sub-wheel.

[0013] Optionally, there are multiple intermediate telescopic cylinders, including: a primary intermediate telescopic cylinder, which is movably disposed on the fixed cylinder along its length and located inside the fixed cylinder, and is provided with the other of the first guide rail and the first guide wheel; and a secondary intermediate telescopic cylinder, which is movably disposed on the primary intermediate telescopic cylinder along its length and located inside the primary intermediate telescopic cylinder, and the end telescopic cylinder is movably disposed on the secondary intermediate telescopic cylinder along its length and located inside the secondary intermediate telescopic cylinder, and is provided with the other of the second guide rail and the second guide wheel, wherein the primary intermediate telescopic cylinder is provided with the other of the third guide rail and the third guide wheel, the secondary intermediate telescopic cylinder is provided with the other of the third guide rail and the third guide wheel, the third guide rail extends along the length of the fixed cylinder, and the third guide wheel and the third guide rail cooperate with each other.

[0014] Optionally, the third guide wheel includes a fifth sub-wheel and a sixth sub-wheel, the fifth sub-wheel and the sixth sub-wheel being spaced apart in the circumferential direction of the fixed cylinder, the dimension of the third guide rail in the circumferential direction of the fixed cylinder decreasing from the inside to the outside, the third guide rail being located between the fifth sub-wheel and the sixth sub-wheel in the circumferential direction of the fixed cylinder, and the third guide rail cooperating with each of the fifth sub-wheel and the sixth sub-wheel.

[0015] Optionally, the top of the fixed cylinder is provided with an upward limiting part, which can cooperate with the top of the intermediate telescopic cylinder to limit the upward movement of the intermediate telescopic cylinder; and / or the bottom of the fixed cylinder is provided with a first downward limiting part, the top of the intermediate telescopic cylinder is provided with a second downward limiting part, the second downward limiting part is located above the first downward limiting part and can cooperate with the first downward limiting part to limit the downward movement of the intermediate telescopic cylinder, the bottom of the intermediate telescopic cylinder is provided with a third downward limiting part, and the top of the end telescopic cylinder is provided with a fourth downward limiting part, the fourth downward limiting part is located above the third downward limiting part and can cooperate with the third downward limiting part to limit the downward movement of the end telescopic cylinder.

[0016] Optionally, the first descending limiting portion has a first chamfered portion, and the second descending limiting portion has a second chamfered portion, the second chamfered portion being able to cooperate with the first chamfered portion.

[0017] Optionally, the end telescopic cylinder is provided with a gripper, and the guide includes a first guide and a second guide, which are alternatively provided on the gripper.

[0018] 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 perpendicular to the first horizontal direction; and a telescopic sleeve assembly, wherein the telescopic sleeve assembly is the telescopic sleeve assembly of the present invention, and the fixed sleeve of the telescopic sleeve assembly is disposed on the rotary device.

[0019] By setting rigid intermediate and end telescopic cylinders and placing the guide component in the end telescopic cylinder, the guide component can be placed into the drainage hole of the core support lower plate using the rigid intermediate and end telescopic cylinders. Therefore, the guide component does not wobble during its descent, allowing for precise and rapid placement into the drainage hole of the core support lower plate, effectively improving the placement efficiency and accuracy of the guide component.

[0020] The fuel assembly loading guide device and its telescopic sleeve assembly of the present invention can accurately and quickly place the guide component into the water flow hole of the core support lower plate, effectively improving the placement efficiency and accuracy of the guide component. Attached Figure Description

[0021] 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 schematic diagram of the structure of the fixed cylinder of the fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the primary intermediate telescopic cylinder of the fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the secondary intermediate telescopic cylinder of the fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 5 This is a partial structural schematic diagram of a fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the telescopic sleeve assembly of the fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 7 This is a partial cross-sectional view of the telescopic sleeve assembly of the fuel assembly loading guide device according to an embodiment of the present invention; Figure 8 This is a partial cross-sectional view of the telescopic sleeve assembly of the fuel assembly loading guide device according to an embodiment of the present invention; Figure 9 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 10 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 11 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 12 This is a partial structural schematic diagram of a fuel assembly loading and guiding device according to an embodiment of the present invention; Figure 13 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; Figure 14 This is a partial structural schematic diagram of the telescopic sleeve assembly of the fuel assembly loading and guiding device according to an embodiment of the present invention. Detailed Implementation

[0022] 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.

[0023] The telescopic sleeve assembly 100 of the fuel assembly loading guide device 1000 according to an embodiment of the present invention is described below with reference to the accompanying drawings. Figures 1-14 As shown, the telescopic sleeve assembly 100 of the fuel assembly loading and guiding device 1000 according to an embodiment of the present invention includes a fixed sleeve 1, an intermediate telescopic sleeve 2, an end telescopic sleeve 3, a rope, and a guide member 6.

[0024] The intermediate telescopic cylinder 2 is movably disposed on the fixed cylinder 1 along its length, and is located inside the fixed cylinder 1, i.e., the fixed cylinder 1 is fitted onto the intermediate telescopic cylinder 2. The end telescopic cylinder 3 is movably disposed on the intermediate telescopic cylinder 2 along its length, and is located inside the intermediate telescopic cylinder 2, i.e., the intermediate telescopic cylinder 2 is fitted onto the end telescopic cylinder 3. A portion of the rope extends into the inside of the fixed cylinder 1, and this portion of the rope is connected to the end telescopic cylinder 3. A guide member 6 is disposed on the end telescopic cylinder 3.

[0025] When the telescopic sleeve assembly 100 is installed on the fuel assembly loading guide device 1000, the length direction of the fixed sleeve 1 is consistent with the vertical direction, and the length direction of the intermediate telescopic sleeve 2 and the length direction of the end telescopic sleeve 3 are also consistent with the vertical direction.

[0026] By connecting the rope to the end telescopic cylinder 3, the rope can drive the end telescopic cylinder 3 and the intermediate telescopic cylinder 2 to move up and down, thereby driving the guide 6 to move up and down, so as to place the guide 6 in the water flow hole of the core support lower plate adjacent to the position of the fuel assembly to be loaded, and remove the guide 6 from the water flow hole of the core support lower plate.

[0027] By setting up rigid intermediate telescopic cylinders 2 and 3, and placing the guide member 6 on the 3rd end telescopic cylinder, the guide member 6 can be placed into the drainage hole of the lower plate of the core support using the rigid intermediate telescopic cylinders 2 and 3. Therefore, during the descent of the guide member 6, there is no swaying, allowing for precise and rapid placement of the guide member 6 into the drainage hole of the lower plate of the core support, effectively improving the placement efficiency and accuracy of the guide member 6.

[0028] According to an embodiment of the present invention, the telescopic sleeve assembly 100 of the fuel assembly loading guide device 1000 can accurately and quickly place the guide 6 into the water flow hole of the core support lower plate, effectively improving the placement efficiency and accuracy of the guide 6.

[0029] like Figures 1-14 As shown, the fuel assembly loading and guiding device 1000 according to an embodiment of the present invention includes a moving platform 200, a rotating device 300, and a telescopic sleeve assembly 100.

[0030] The mobile platform 200 is movably mounted along a first horizontal direction, and the rotary device 300 is movably mounted on the mobile platform 200 along a second horizontal direction, which is perpendicular to the first horizontal direction. The fixed cylinder 1 of the telescopic sleeve assembly 100 is mounted on the rotary device 300.

[0031] Accordingly, the fuel assembly loading guide device 1000 according to the present invention can accurately and quickly place the guide 6 into the water flow hole of the core support lower plate, effectively improving the placement efficiency and accuracy of the guide 6.

[0032] The fuel assembly loading guide device 1000 is used during reactor shutdown and refueling. When used during reactor shutdown and refueling, the fuel assembly loading guide device 1000 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 device 1000 can place the guide element 6 into the drainage hole of the lower core support plate adjacent to the location of the fuel assembly to be loaded. The guide element 6 provides guidance and positioning for loading the fuel assembly.

[0033] The mobile platform 200 can move the guide member 6 along the first horizontal direction (X direction) via the slewing device 300, the fixed cylinder 1, the intermediate telescopic cylinder 2, and the end telescopic cylinder 3. The slewing device 300 can also move the guide member 6 along the second horizontal direction (Y direction) via the fixed cylinder 1, the intermediate telescopic cylinder 2, and the end telescopic cylinder 3. The slewing device 300 can also rotate the guide member 6 around the vertical direction (Z direction) via the fixed cylinder 1, the intermediate telescopic cylinder 2, and the end telescopic cylinder 3. This allows the guide member 6 and the drainage holes of the core support lower plate to be aligned vertically.

[0034] The intermediate telescopic cylinder 2 and the end telescopic cylinder 3 can drive the guide member 6 to move along the vertical direction (Z-axis) so as to place the guide member 6 into the water flow hole of the lower plate of the core support. (Vertical direction as follows) Figure 1 and Figure 12 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.

[0035] like Figure 1 As shown, the rotary device 300 includes a mounting cylinder 301, which is vertically arranged. A portion of the fixed cylinder 1 is located inside the mounting cylinder 301, and the fixed cylinder 1 can be connected to the mounting cylinder 301 via a flange. This allows for easier and more secure installation of the fixed cylinder 1 into the rotary device 300, thereby making the structure of the fuel assembly loading guide device 1000 more stable. The length direction of the fixed cylinder 1 can be the same as the vertical direction.

[0036] Optionally, the fuel assembly loading guide device 1000 also includes a rope reel, which can be located on the fixed drum 1 or the moving platform 200. The rope is wound around the rope reel so that the rope reel can wind and unwind the rope, thereby causing the intermediate telescopic drum 2 and the end telescopic drum 3 to move in the vertical direction.

[0037] like Figure 1 and Figure 2As shown, the telescopic sleeve assembly 100 also includes a first rope guide pulley 42, which is disposed on the outer peripheral surface of the fixed cylinder 1. A first portion of the rope is wound around the first rope guide pulley 42, which is located radially between the first portion of the rope and the fixed cylinder 1. By providing the first rope guide pulley 42, the rope can be conveniently extended vertically to the top 111 of the fixed cylinder 1.

[0038] like Figure 1 and Figure 2 As shown, there are multiple first rope guide wheels 42, which are spaced apart along the vertical direction on the outer circumference of the fixed cylinder 1. The first part of the rope is wound around the multiple first rope guide wheels 42 to provide a more stable rope deployment.

[0039] Optionally, the first rope guide pulley 42 is located above the mounting cylinder 301 and the rope reel. The first portion of the rope is parallel to the fixed cylinder 1.

[0040] like Figure 2 As shown, the telescopic sleeve assembly 100 also includes a second rope guide pulley 43, which is located at the top 111 of the fixed sleeve 1. The rope passes around the second rope guide pulley 43 to change its extension direction. This allows the rope to more easily extend into the inside of the fixed sleeve 1, and thus makes it easier to connect the rope to the end telescopic sleeve 3. Moreover, by providing the first rope guide pulley 42 and the second rope guide pulley 43, the rope can be laid out more stably.

[0041] A first wheel frame 44 is provided on the outer circumferential surface of the fixed cylinder 1. The first wheel frame 44 extends outward from the fixed cylinder 1, that is, the first wheel frame 44 extends radially along the fixed cylinder 1. The first rope guide wheel 42 is rotatably mounted on the first wheel frame 44. A second wheel frame 45 is provided on the top 111 of the fixed cylinder 1. The second wheel frame 45 extends upward from the top 111 of the fixed cylinder 1. The second rope guide wheel 43 is rotatably mounted on the second wheel frame 45.

[0042] like Figure 5 and Figure 6 As shown, the end telescopic cylinder 3 is provided with a first retractable part 31, which extends outward from the end telescopic cylinder 3. The first retractable part 31 can cooperate with the intermediate telescopic cylinder 2 to drive the intermediate telescopic cylinder 2 to retract.

[0043] When the end telescopic cylinder 3 and the intermediate telescopic cylinder 2 retract, the end telescopic cylinder 3 remains stationary due to the constraint of the rope. The first retracted part 31 contacts the intermediate telescopic cylinder 2 to stop the intermediate telescopic cylinder 2, and the intermediate telescopic cylinder 2 also remains stationary.

[0044] When the guide 6 is placed into the drainage hole of the lower plate of the core support, the rope is released to allow the end telescopic cylinder 3 to move downwards, which in turn moves the guide 6 downwards. At this time, the first retractable part 31 is still in contact with the intermediate telescopic cylinder 2, so that the intermediate telescopic cylinder 2 and the end telescopic cylinder 3 move downwards synchronously. When the intermediate telescopic cylinder 2 moves downwards to its lowest position (limit position), the intermediate telescopic cylinder 2 stops moving downwards, while the end telescopic cylinder 3 continues to move downwards until the guide 6 is placed into the drainage hole of the lower plate of the core support.

[0045] After the guide 6 is placed into the drainage hole of the core support lower plate, the end telescopic cylinder 3 disengages from the guide 6, and the rope is retracted to move the end telescopic cylinder 3 upward. After the first retracted part 31 of the end telescopic cylinder 3 contacts the intermediate telescopic cylinder 2, the end telescopic cylinder 3 moves the intermediate telescopic cylinder 2 upward together to retract the end telescopic cylinder 3 and the intermediate telescopic cylinder 2.

[0046] By providing a first retractable part 31 that can cooperate with the intermediate telescopic cylinder 2, the extension (lowering) and retraction (raising) of the intermediate telescopic cylinder 2 can be controlled more conveniently and more stably.

[0047] like Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, there are multiple intermediate telescopic cylinders 2, including a primary intermediate telescopic cylinder 21 and a secondary intermediate telescopic cylinder 22.

[0048] A primary intermediate telescopic cylinder 21 is movably disposed on the fixed cylinder 1 along its length, and is located inside the fixed cylinder 1. A secondary intermediate telescopic cylinder 22 is movably disposed on the primary intermediate telescopic cylinder 21 along its length, and is located inside the primary intermediate telescopic cylinder 21. An end telescopic cylinder 3 is movably disposed on the secondary intermediate telescopic cylinder 22 along its length, and is located inside the secondary intermediate telescopic cylinder 22.

[0049] By setting up a primary intermediate telescopic cylinder 21 and a secondary intermediate telescopic cylinder 22, the lengths of the primary intermediate telescopic cylinder 21, the secondary intermediate telescopic cylinder 22, and the end telescopic cylinder 3 can be reduced. This not only reduces the processing, transportation, and assembly difficulties of the primary intermediate telescopic cylinder 21, the secondary intermediate telescopic cylinder 22, and the end telescopic cylinder 3, but also prevents slight misalignment of the primary intermediate telescopic cylinder 21, the secondary intermediate telescopic cylinder 22, and the end telescopic cylinder 3 during descent. This allows the guide component 6 to be placed more accurately and quickly into the drainage holes of the core support lower plate.

[0050] like Figure 5 and Figure 6As shown, in one embodiment of the present invention, a first retractable portion 31 is disposed at the bottom 35 of the end telescopic cylinder 3, the first retractable portion 31 extends outward from the end telescopic cylinder 3, and the first retractable portion 31 can cooperate with the bottom surface of the secondary intermediate telescopic cylinder 22. A second retractable portion 221 is disposed at the bottom 225 of the secondary intermediate telescopic cylinder 22, the second retractable portion 221 extends outward from the secondary intermediate telescopic cylinder 22, and the second retractable portion 221 can cooperate with the bottom surface of the primary intermediate telescopic cylinder 21.

[0051] When the end telescopic cylinder 3, the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21 retract, the first retraction part 31 stops the secondary intermediate telescopic cylinder 22 and the second retraction part 221 stops the primary intermediate telescopic cylinder 21, so that the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21 are in a stationary state.

[0052] When the guide 6 is placed into the drainage hole of the lower plate of the core support, the end telescopic cylinder 3, the secondary intermediate telescopic cylinder 22, and the primary intermediate telescopic cylinder 21 move downwards synchronously. After the primary intermediate telescopic cylinder 21 moves to its lowest position (limit position), it stops moving downwards, while the secondary intermediate telescopic cylinder 22 and the end telescopic cylinder 3 continue to move downwards synchronously. After the secondary intermediate telescopic cylinder 22 moves to its lowest position (limit position), it stops moving downwards, while the end telescopic cylinder 3 continues to move downwards until the guide 6 is placed into the drainage hole of the lower plate of the core support.

[0053] After the guide 6 is placed into the drainage hole in the lower plate of the core support, the rope is retracted to move the end telescopic cylinder 3 upward. After the first retracted portion 31 of the end telescopic cylinder 3 contacts the secondary intermediate telescopic cylinder 22, the end telescopic cylinder 3 moves the secondary intermediate telescopic cylinder 22 upward together. Subsequently, after the second retracted portion 221 of the secondary intermediate telescopic cylinder 22 contacts the primary intermediate telescopic cylinder 21, the end telescopic cylinder 3 and the secondary intermediate telescopic cylinder 22 move the primary intermediate telescopic cylinder 21 upward together, so that the end telescopic cylinder 3, the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21 retract.

[0054] By providing a first retractable part 31 that can cooperate with the secondary intermediate telescopic cylinder 22 and a second retractable part 221 that can cooperate with the primary intermediate telescopic cylinder 21, the extension (descent) and retraction (ascent) of the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21 can be controlled more conveniently and more stably.

[0055] In another embodiment of the present invention, a first retractable portion 31 is provided at the bottom 35 of the end telescopic cylinder 3, and the first retractable portion 31 extends outward from the end telescopic cylinder 3. The first retractable portion 31 can cooperate with the bottom surface of both the secondary intermediate telescopic cylinder 22 and the bottom surface of the primary intermediate telescopic cylinder 21.

[0056] When the end telescopic cylinder 3, the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21 retract, the first retraction part 31 stops the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21 so that the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21 are in a stationary state.

[0057] After the guide 6 is placed into the drainage hole of the core support lower plate, the rope is retracted to move the end telescopic cylinder 3 upward. After the first retracted portion 31 of the end telescopic cylinder 3 contacts the secondary intermediate telescopic cylinder 22, the end telescopic cylinder 3 moves the secondary intermediate telescopic cylinder 22 upward together. Subsequently, after the first retracted portion 31 of the end telescopic cylinder 3 contacts the primary intermediate telescopic cylinder 21, the end telescopic cylinder 3 moves the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21 upward together, so that the end telescopic cylinder 3, the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21 retract.

[0058] By providing a first retractable part 31 that can cooperate with the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21, it is possible to control the extension (lowering) and retraction (rising) of the secondary intermediate telescopic cylinder 22 and the primary intermediate telescopic cylinder 21 more conveniently and stably, and the structure of the telescopic sleeve assembly 100 can be simplified.

[0059] like Figures 1-8 As shown, the fixed cylinder 1 is provided with one of a first guide rail 211 and a first guide wheel 12, and the intermediate telescopic cylinder 2 is provided with the other of the first guide rail 211 and the first guide wheel 12. The first guide rail 211 extends along the length direction of the fixed cylinder 1, and the first guide wheel 12 cooperates with the first guide rail 211. The intermediate telescopic cylinder 2 is provided with one of a second guide rail 32 and a second guide wheel 222, and the end telescopic cylinder 3 is provided with the other of the second guide rail 32 and the second guide wheel 222. The second guide rail 32 extends along the length direction of the fixed cylinder 1, and the second guide wheel 222 cooperates with the second guide rail 32.

[0060] This allows the end telescopic cylinder 3 and the middle telescopic cylinder 2 to move more stably in the vertical direction, further preventing slight deviation of the end telescopic cylinder 3 and the middle telescopic cylinder 2 during descent. This allows the guide 6 to be placed more accurately and quickly into the water flow hole of the core support lower plate, thus improving the placement efficiency and accuracy of the guide 6 more effectively.

[0061] like Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the primary intermediate telescopic cylinder 21 is provided with one of a first guide rail 211 and a first guide wheel 12, and the primary intermediate telescopic cylinder 21 and the fixed cylinder 1 are connected by the first guide rail 211 and the first guide wheel 12. The secondary intermediate telescopic cylinder 22 is provided with one of a second guide rail 32 and a second guide wheel 222, and the secondary intermediate telescopic cylinder 22 and the end telescopic cylinder 3 are connected by the second guide rail 32 and the second guide wheel 222.

[0062] The primary intermediate telescopic cylinder 21 is provided with one of a third guide rail 223 and a third guide wheel 212, and the secondary intermediate telescopic cylinder 22 is provided with the other of a third guide rail 223 and a third guide wheel 212. The third guide rail 223 extends along the length of the fixed cylinder 1, and the third guide wheel 212 cooperates with the third guide rail 223.

[0063] This allows the end telescopic cylinder 3, the secondary intermediate telescopic cylinder 22, and the primary intermediate telescopic cylinder 21 to move more stably in the vertical direction, further preventing slight deviations during descent. This allows the guide 6 to be placed more accurately and quickly into the drainage holes of the core support lower plate, thus improving the placement efficiency and accuracy of the guide 6.

[0064] Optionally, the first guide rail 211 and the first guide wheel 12 are spaced apart from the third guide rail 223 and the third guide wheel 212 in the circumferential direction of the fixed cylinder 1, and the third guide rail 223 and the third guide wheel 212 are spaced apart from the second guide rail 32 and the second guide wheel 222 in the circumferential direction of the fixed cylinder 1. This can effectively reduce the difficulty of arranging the guide rails and guide wheels, thereby reducing the manufacturing and assembly difficulty of the telescopic sleeve assembly 100.

[0065] For example, the first guide rail 211 and the first guide wheel 12 are 90 degrees apart from the third guide rail 223 and the third guide wheel 212 in the circumferential direction of the fixed cylinder 1, and the third guide rail 223 and the third guide wheel 212 are 90 degrees apart from the second guide rail 32 and the second guide wheel 222 in the circumferential direction of the fixed cylinder 1. This can further reduce the difficulty of arranging the guide rails and guide wheels, thereby further reducing the manufacturing and assembly difficulty of the telescopic sleeve assembly 100.

[0066] like Figure 2 , Figure 3 , Figure 7 and Figure 14As shown, the first guide wheel 12 includes a first sub-wheel 121 and a second sub-wheel 122, which are spaced apart circumferentially from the fixed cylinder 1. The dimension of the first guide rail 211 in the circumferential direction of the fixed cylinder 1 decreases from the inside out. The first guide rail 211 is located between the first sub-wheel 121 and the second sub-wheel 122 in the circumferential direction of the fixed cylinder 1, and the first guide rail 211 mates with each of the first sub-wheel 121 and the second sub-wheel 122.

[0067] By positioning the first guide rail 211 between the first sub-wheel 121 and the second sub-wheel 122 in the circumferential direction of the fixed cylinder 1, the rotation of the first intermediate telescopic cylinder 21 (intermediate telescopic cylinder 2) relative to the fixed cylinder 1 can be effectively prevented, so that the first intermediate telescopic cylinder 21 (intermediate telescopic cylinder 2) can move up and down more stably.

[0068] By reducing the circumferential dimension of the first guide rail 211 in the direction from the inside to the outside, the first guide rail 211 can be more tightly engaged with the first sub-wheel 121 and the second sub-wheel 122, so that the first intermediate telescopic cylinder 21 (intermediate telescopic cylinder 2) can move up and down more stably.

[0069] This allows the guide member 6 to be placed more accurately and quickly into the drainage holes of the core support lower plate, thus improving the placement efficiency and accuracy of the guide member 6 more effectively. Optionally, the first guide rail 211 is V-shaped.

[0070] like Figure 4 , Figure 5 , Figure 8 and Figure 14 As shown, the second guide wheel 222 includes a third sub-wheel 2221 and a fourth sub-wheel 2222, which are spaced apart circumferentially on the fixed cylinder 1. The second guide rail 32 decreases in size circumferentially on the fixed cylinder 1 from the inside out. The second guide rail 32 is located between the third sub-wheel 2221 and the fourth sub-wheel 2222 on the fixed cylinder 1, and mates with each of the third sub-wheel 2221 and the fourth sub-wheel 2222.

[0071] By positioning the second guide rail 32 between the third sub-wheel 2221 and the fourth sub-wheel 2222 in the circumferential direction of the fixed cylinder 1, the relative rotation of the secondary intermediate telescopic cylinder 22 (intermediate telescopic cylinder 2) and the end telescopic cylinder 3 can be effectively prevented, so that the secondary intermediate telescopic cylinder 22 (intermediate telescopic cylinder 2) and the end telescopic cylinder 3 can move up and down more stably.

[0072] By reducing the circumferential dimension of the second guide rail 32 in the fixed cylinder 1 from the inside out, the second guide rail 32 can be more closely engaged with the third sub-wheel 2221 and the fourth sub-wheel 2222, so that the secondary intermediate telescopic cylinder 22 (intermediate telescopic cylinder 2) and the end telescopic cylinder 3 can move up and down more stably.

[0073] This allows the guide member 6 to be placed more accurately and quickly into the drainage holes of the core support lower plate, thus improving the placement efficiency and accuracy of the guide member 6 more effectively. Optionally, the second guide rail 32 is V-shaped.

[0074] like Figure 3 , Figure 4 , Figure 7 and Figure 14 As shown, the third guide wheel 212 includes a fifth sub-wheel 2121 and a sixth sub-wheel 2122, which are spaced apart circumferentially on the fixed cylinder 1. The dimension of the third guide rail 223 in the circumferential direction of the fixed cylinder 1 decreases from the inside out. The third guide rail 223 is located between the fifth sub-wheel 2121 and the sixth sub-wheel 2122 in the circumferential direction of the fixed cylinder 1, and the third guide rail 223 mates with each of the fifth sub-wheel 2121 and the sixth sub-wheel 2122.

[0075] By positioning the third guide rail 223 between the fifth sub-wheel 2121 and the sixth sub-wheel 2122 in the circumferential direction of the fixed cylinder 1, the relative rotation of the first-stage intermediate telescopic cylinder 21 and the second-stage intermediate telescopic cylinder 22 can be effectively prevented, so that the first-stage intermediate telescopic cylinder 21 and the second-stage intermediate telescopic cylinder 22 can move up and down more stably.

[0076] By reducing the circumferential dimension of the third guide rail 223 in the fixed cylinder 1 from the inside out, the third guide rail 223 can be more closely fitted with the fifth sub-wheel 2121 and the sixth sub-wheel 2122, so that the first-stage intermediate telescopic cylinder 21 and the second-stage intermediate telescopic cylinder 22 can move up and down more stably.

[0077] This allows the guide member 6 to be placed more accurately and quickly into the drainage holes of the core support lower plate, thus improving the placement efficiency and accuracy of the guide member 6 more effectively. Optionally, the third guide rail 223 is V-shaped.

[0078] like Figure 2 As shown, the top 111 of the fixed cylinder 1 is provided with a rising limiting part 13, which can cooperate with the top of the intermediate telescopic cylinder 2 to limit the rising of the intermediate telescopic cylinder 2, thereby limiting the rising of the end telescopic cylinder 3. This can prevent the intermediate telescopic cylinder 2 and the end telescopic cylinder 3 from coming off the fixed cylinder 1.

[0079] Optionally, the rising limit part 13 of the fixed cylinder 1 can cooperate with the top 214 of the first-stage intermediate telescopic cylinder 21 to limit the rising of the first-stage intermediate telescopic cylinder 21, the second-stage intermediate telescopic cylinder 22 and the end telescopic cylinder 3, thereby preventing the first-stage intermediate telescopic cylinder 21, the second-stage intermediate telescopic cylinder 22 and the end telescopic cylinder 3 from coming out of the fixed cylinder 1.

[0080] like Figure 4 , Figure 5 and Figure 7 As shown, the bottom 112 of the fixed cylinder 1 is provided with a first descending limit part 14, and the top of the intermediate telescopic cylinder 2 is provided with a second descending limit part 213. The second descending limit part 213 is located above the first descending limit part 14, and the second descending limit part 213 can cooperate with the first descending limit part 14 to limit the descent of the intermediate telescopic cylinder 2.

[0081] The bottom of the intermediate telescopic cylinder 2 is provided with a third descent limiting part 224, and the top 33 of the end telescopic cylinder 3 is provided with a fourth descent limiting part 34. The fourth descent limiting part 34 is located above the third descent limiting part 224, and the fourth descent limiting part 34 can cooperate with the third descent limiting part 224 to limit the descent of the end telescopic cylinder 3.

[0082] This prevents the intermediate telescopic cylinder 2 from detaching downwards from the fixed cylinder 1 and also prevents the end telescopic cylinder 3 from detaching downwards from the intermediate telescopic cylinder 2.

[0083] like Figure 4 , Figure 7 and Figure 8 As shown, the top 214 of the first-stage intermediate telescopic cylinder 21 is provided with a second descending limit part 213, and the bottom 225 of the second-stage intermediate telescopic cylinder 22 is provided with a third descending limit part 224.

[0084] The bottom 215 of the primary intermediate telescopic cylinder 21 is provided with a fifth descent limiting part 216, and the top 226 of the secondary intermediate telescopic cylinder 22 is provided with a sixth descent limiting part 227. The sixth descent limiting part 227 is located above the fifth descent limiting part 216, and the sixth descent limiting part 227 can cooperate with the fifth descent limiting part 216 to restrict the descent of the secondary intermediate telescopic cylinder 22. This prevents the secondary intermediate telescopic cylinder 22 from dislodging downwards from the primary intermediate telescopic cylinder 21.

[0085] like Figure 7As shown, the first descending limiting part 14 has a first chamfered part 141, and the second descending limiting part 213 has a second chamfered part 217, which can cooperate with the first chamfered part 141. This can effectively eliminate the influence of the gap between the first guide rail 211 and the first guide wheel 12, so that the first-stage intermediate telescopic cylinder 21 (intermediate telescopic cylinder 2) is in a more stable state, thereby effectively improving the overall lifting accuracy of the telescopic sleeve assembly 100, so that the guide member 6 can be placed more accurately and faster into the water flow hole of the core support lower plate.

[0086] like Figure 8 As shown, the fifth descending limit part 216 has a third chamfered part 218, and the sixth descending limit part 227 has a fourth chamfered part 228. The fourth chamfered part 228 can cooperate with the third chamfered part 218. This can effectively eliminate the influence of the gap between the third guide rail 223 and the third guide wheel 212, so that the secondary intermediate telescopic cylinder 22 is in a more stable state, thereby effectively improving the overall lifting accuracy of the telescopic sleeve assembly 100, so that the guide member 6 can be placed more accurately and faster into the water flow hole of the core support lower plate.

[0087] Optionally, a camera is provided on the end telescopic cylinder 3 or the first-stage intermediate telescopic cylinder 21. This allows the camera to monitor the movement of the guide member 6, thus assisting in the positioning of the guide member 6.

[0088] like Figure 1 , Figure 5 as well as Figures 9-11 As shown, the telescopic sleeve assembly 100 and the fuel assembly loading guide device 1000 also include an adaptive adjustment assembly 7, which includes a body 71, a first moving member 72, a first resetting member 73, a second moving member 74, and a second resetting member 75.

[0089] The main body 71 is disposed on the end telescopic cylinder 3 so that the end telescopic cylinder 3 drives the main body 71 and the adaptive adjustment component 7 to move up and down. A first moving member 72 is movably disposed on the main body 71 along a first preset horizontal direction. A first resetting member 73 cooperates with both the main body 71 and the first moving member 72 to drive the first moving member 72 to reset in the first preset horizontal direction. A second moving member 74 is movably disposed on the first moving member 72 along a second preset horizontal direction, which is perpendicular to the first preset horizontal direction. A second resetting member 75 cooperates with both the first moving member 72 and the second moving member 74 to drive the second moving member 74 to reset in the second preset horizontal direction. A guide member 6 can be disposed on the second moving member 74, thereby allowing the guide member 6 to move along both the first and second preset horizontal directions.

[0090] By setting a first movable member 72 that can move along a first preset horizontal direction and a second movable member 74 that can move along a second preset horizontal direction, and by placing the guide member 6 on the second movable member 74, the guide member 6 can be moved along the first preset horizontal direction and the second preset horizontal direction.

[0091] When the guide member 6 is placed in the drainage hole of the lower plate of the core support, if there is a deviation between the position of the guide member 6 and the position of the drainage hole, the first moving member 72 can be moved along the first preset horizontal direction and / or the second moving member 74 can be moved along the second preset horizontal direction to eliminate the deviation. This deviation can then be eliminated through the adjustment function of the adaptive adjustment component 7. This allows the guide member 6 to be placed smoothly, accurately, and quickly in the drainage hole of the lower plate of the core support, effectively improving the placement efficiency and accuracy of the guide member 6.

[0092] After the guide member 6 is placed in the drainage hole of the core support lower plate, if the first moving member 72 and the second moving member 74 move, the first moving member 72 can be reset by the action of the first resetting member 73, and the second moving member 74 can be reset by the action of the second resetting member 75. 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.

[0093] like Figure 1 , Figure 5 , Figure 11 and Figure 12 As shown, the end telescopic cylinder 3 is equipped with a gripper 5. The guide member 6 includes a first guide member 61 and a second guide member 62, which are alternatively provided on the gripper 5. Optionally, the gripper 5 is provided on the second movable member 74 so that it is positioned on the end telescopic cylinder 3 via the second movable member 74.

[0094] 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 are required, and each rotating device is equipped with a lifting component that drives the guide components up and down. The two lifting components 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.

[0095] The telescopic sleeve assembly 100 and the fuel assembly loading guide device 1000 are equipped with a gripper 5, and the first guide member 61 and the second guide member 62 are interchangeably mounted on the gripper 5. This allows the gripper 5 to place the first guide member 61 and the second guide member 62 into the drainage holes of the core support lower plate, respectively. This eliminates the need for two rotating devices 300 and two telescopic sleeve assemblies 100, thus simplifying the structure of the fuel assembly loading guide device 1000 and reducing its manufacturing cost.

[0096] Furthermore, since there is no need to set up two slewing devices 300, mutual interference and collision between the two slewing devices 300 can be avoided. This not only eliminates the need for components to prevent the two slewing devices 300 from colliding (such as hard limiters, laser rangefinders, etc.), but also eliminates the need to consider the problem of the two slewing devices 300 avoiding each other, making the slewing devices 300 and the fuel assembly loading and guiding device 1000 easier to operate.

[0097] like Figure 11 As shown, the gripper 5 includes a gripping body 51 and a gripping hook 51, the gripping hook 51 being movably disposed on the gripping body 51 between an extended position and a retracted position. The first guide member 61 includes a first body 611 and a first gripping part 612, the first gripping part 612 being disposed on the first body 611. The second guide member 62 includes a second body 621 and a second gripping part 622, the second gripping part 622 being disposed on the second body 621.

[0098] The extended gripper 51 can cooperate with the first gripper 612 and the second gripper 622 to grip the first guide member 61 and the second guide member 62, and the retracted gripper 51 can disengage from the first gripper 612 and the second gripper 622.

[0099] When the gripper 5 grips the first guide member 61 (second guide member 62), the hook 51 moves from the retracted position to the extended position so that the hook 51 grips the first guide member 61 (second guide member 62); when the gripper 5 releases the first guide member 61 (second guide member 62), the hook 51 moves from the extended position to the retracted position so that the hook 51 disengages from the first guide member 61 (second guide member 62).

[0100] By providing a movable gripping hook 51 between the extended and retracted positions on the gripper body 51 of the gripper 5, the gripper 5 can more easily and securely grip the first guide member 61 and the second guide member 62, and more easily release (detach) the first guide member 61 and the second guide member 62. By providing a first gripping part 612 and a second gripping part 622, the gripper 5 can more easily and securely grip the first guide member 61 and the second guide member 62.

[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 telescopic sleeve assembly for a fuel assembly loading and guiding device, characterized in that, include: Fixed cylinder; An intermediate telescopic cylinder is movably disposed on the fixed cylinder along the length direction of the fixed cylinder and located inside the fixed cylinder; An end telescopic tube is movably disposed on the middle telescopic tube along the length direction of the fixed tube and located inside the middle telescopic tube; A rope, a portion of which extends into the inside of the fixed tube and is connected to the end telescopic tube; and A guide member is provided at the end telescopic cylinder.

2. The telescopic sleeve assembly of the fuel assembly loading and guiding device according to claim 1, characterized in that, Also includes: A first rope guide wheel is disposed on the outer peripheral surface of the fixed cylinder, a first portion of the rope is wound around the first rope guide wheel, and the first rope guide wheel is located radially between the first portion of the rope and the fixed cylinder. and The second rope guide wheel is located at the top of the fixed cylinder, and the rope passes around the second rope guide wheel to change its extension direction.

3. The telescopic sleeve assembly of the fuel assembly loading and guiding device according to claim 1, characterized in that, The end telescopic cylinder is provided with a first retractable part, which extends outward from the end telescopic cylinder. The first retractable part can cooperate with the intermediate telescopic cylinder to drive the intermediate telescopic cylinder to retract.

4. The telescopic sleeve assembly of the fuel assembly loading and guiding device according to claim 3, characterized in that, There are multiple intermediate telescopic cylinders, including a primary intermediate telescopic cylinder and a secondary intermediate telescopic cylinder. The primary intermediate telescopic cylinder is movably disposed within the fixed cylinder along its length and located inside the fixed cylinder. The secondary intermediate telescopic cylinder is movably disposed within the primary intermediate telescopic cylinder along its length and located inside the primary intermediate telescopic cylinder. The end telescopic cylinder is movably disposed within the secondary intermediate telescopic cylinder along its length and located inside the secondary intermediate telescopic cylinder. The first retractable part is located at the bottom of the end telescopic cylinder and extends outward from the end telescopic cylinder. The first retractable part can cooperate with the bottom surface of the second-stage intermediate telescopic cylinder. The second retractable part is located at the bottom of the second-stage intermediate telescopic cylinder and extends outward from the second-stage intermediate telescopic cylinder. The second retractable part can cooperate with the bottom surface of the first-stage intermediate telescopic cylinder. or The first retractable part is located at the bottom of the end telescopic cylinder and extends outward from the end telescopic cylinder. The first retractable part can cooperate with the bottom surface of both the second-stage intermediate telescopic cylinder and the bottom surface of the first-stage intermediate telescopic cylinder.

5. The telescopic sleeve assembly of the fuel assembly loading and guiding device according to claim 1, characterized in that, The fixed cylinder is provided with one of a first guide rail and a first guide wheel, and the intermediate telescopic cylinder is provided with the other of the first guide rail and the first guide wheel. The first guide rail extends along the length direction of the fixed cylinder, and the first guide wheel and the first guide rail cooperate with each other. The intermediate telescopic cylinder is provided with one of a second guide rail and a second guide wheel, and the end telescopic cylinder is provided with the other of a second guide rail and a second guide wheel. The second guide rail extends along the length direction of the fixed cylinder, and the second guide wheel and the second guide rail cooperate with each other.

6. The telescopic sleeve assembly of the fuel assembly loading and guiding device according to claim 5, characterized in that, The first guide wheel includes a first sub-wheel and a second sub-wheel, which are spaced apart in the circumferential direction of the fixed cylinder. The dimension of the first guide rail in the circumferential direction of the fixed cylinder decreases from the inside to the outside. The first guide rail is located between the first sub-wheel and the second sub-wheel in the circumferential direction of the fixed cylinder. The first guide rail cooperates with each of the first sub-wheel and the second sub-wheel. The second guide wheel includes a third sub-wheel and a fourth sub-wheel, which are spaced apart in the circumferential direction of the fixed cylinder. The dimension of the second guide rail in the circumferential direction of the fixed cylinder decreases from the inside to the outside. The second guide rail is located between the third sub-wheel and the fourth sub-wheel in the circumferential direction of the fixed cylinder. The second guide rail cooperates with each of the third sub-wheel and the fourth sub-wheel.

7. The telescopic sleeve assembly of the fuel assembly loading and guiding device according to claim 5 or 6, characterized in that, There are multiple intermediate telescopic cylinders, and the multiple intermediate telescopic cylinders include: A primary intermediate telescopic cylinder, movably disposed within the fixed cylinder along its length and located inside the fixed cylinder, the primary intermediate telescopic cylinder being provided with the other of the first guide rail and the first guide wheel; and A secondary intermediate telescopic cylinder is movably disposed within the primary intermediate telescopic cylinder along the length direction of the fixed cylinder and located inside the primary intermediate telescopic cylinder. An end telescopic cylinder is movably disposed within the secondary intermediate telescopic cylinder along the length direction of the fixed cylinder and located inside the secondary intermediate telescopic cylinder. The secondary intermediate telescopic cylinder is provided with one of a second guide rail and a second guide wheel. The primary intermediate telescopic cylinder is provided with one of a third guide rail and a third guide wheel, and the secondary intermediate telescopic cylinder is provided with the other of a third guide rail and a third guide wheel. The third guide rail extends along the length direction of the fixed cylinder, and the third guide wheel and the third guide rail cooperate with each other.

8. The telescopic sleeve assembly of the fuel assembly loading and guiding device according to claim 7, characterized in that, The third guide wheel includes a fifth sub-wheel and a sixth sub-wheel, which are spaced apart in the circumferential direction of the fixed cylinder. The dimension of the third guide rail in the circumferential direction of the fixed cylinder decreases from the inside to the outside. The third guide rail is located between the fifth sub-wheel and the sixth sub-wheel in the circumferential direction of the fixed cylinder, and the third guide rail cooperates with each of the fifth sub-wheel and the sixth sub-wheel.

9. The telescopic sleeve assembly of the fuel assembly loading and guiding device according to claim 1, characterized in that, The top of the fixed cylinder is provided with a rising limiting part, which can cooperate with the top of the intermediate telescopic cylinder to limit the rising of the intermediate telescopic cylinder; and / or The bottom of the fixed cylinder is provided with a first descent limiting part, the top of the intermediate telescopic cylinder is provided with a second descent limiting part, the second descent limiting part is located above the first descent limiting part and can cooperate with the first descent limiting part to restrict the descent of the intermediate telescopic cylinder, the bottom of the intermediate telescopic cylinder is provided with a third descent limiting part, and the top of the end telescopic cylinder is provided with a fourth descent limiting part, the fourth descent limiting part is located above the third descent limiting part and can cooperate with the third descent limiting part to restrict the descent of the end telescopic cylinder.

10. The telescopic sleeve assembly of the fuel assembly loading and guiding device according to claim 9, characterized in that, The first descending limiting part has a first chamfered part, and the second descending limiting part has a second chamfered part, which can cooperate with the first chamfered part.

11. The telescopic sleeve assembly of the fuel assembly loading and guiding device according to claim 1, characterized in that, The end telescopic cylinder is equipped with a gripper, and the guide includes a first guide and a second guide, which are interchangeably provided on the gripper.

12. 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; and A telescopic sleeve assembly, wherein the telescopic sleeve assembly is the telescopic sleeve assembly according to any one of claims 1-11, and the fixed sleeve of the telescopic sleeve assembly is disposed on the rotary device.

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