Guiding device and assembling platform comprising same

Abstract

The utility model provides a guiding device and an assembling platform comprising the guiding device, the guiding device comprises a lifting driver, a lifting platform and at least one guiding rod vertically arranged on the lifting platform, and the lifting driver is connected with the lifting platform and drives the lifting platform to drive the guiding rod to vertically lift. The guide rod is used for rising from the lower portion and sequentially and freely penetrating through the stacking bottom plate and the stacking elements arranged on the stacking bottom plate so as to limit the stacking elements. According to the guiding device and the assembling platform comprising the guiding device, automatic lifting guiding is achieved, the proper position of the guiding rod can be automatically adjusted according to the height of the multi-layer stacked element, and the guiding efficiency is high. And lifting is stable, and guiding stability is facilitated. The guide rod improves the accuracy and reliability of positioning in a penetrating mode, and the situation that the assembly quality is affected due to the fact that the guide rod collides with the stacked elements can be avoided. Upper and lower stacked elements are guided through the same guide rod, so that the positioning consistency of the upper and lower layers is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of product assembly, in particular to a guide device and an assembly platform comprising the guide device. Background Art

[0002] As a neutron moderator, graphite plays an important role in nuclear reactors. In the installation of nuclear reactors, graphite is used as a core element and is assembled layer by layer on the core bottom plate. The core holes of the upper and lower layers of graphite are interconnected to form molten salt channels for injecting molten salt.

[0003] During the traditional installation of graphite components, due to the heavy weight of the core graphite components and the high matching accuracy required for the molten salt channels, the lack of precise positioning during the installation of the graphite components can easily lead to the offset of the molten salt channels between the layers of graphite.

[0004] Graphite is very brittle and easily damaged by bumps and collisions. Therefore, graphite components are usually placed in place by force control during installation. If the positioning is inaccurate, the lateral force caused by the force control will cause the displacement of the previously installed graphite components or increase the extrusion force between the graphite components.

[0005] Due to the above shortcomings, the existing technology lacks effective guiding technology. In the stacking and assembly of multi-layer products such as graphite, the stable and precise guiding of graphite affects the accuracy and reliability of positioning, as well as the guiding efficiency, thereby affecting the quality and efficiency of product assembly. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the above-mentioned defects in the prior art and provide a guide device and an assembly platform including the guide device.

[0007] The utility model solves the above technical problems through the following technical solutions:

[0008] A guiding device is used to guide the assembly of multi-layer stacking elements, the stacking elements are installed layer by layer on the stacking bottom plate, the guiding device comprises a lifting drive, a lifting platform and at least one guiding rod vertically arranged on the lifting platform, the lifting drive is connected to the lifting platform, and drives the lifting platform to drive the guiding rod to vertically lift and lower, the guiding rod is used to rise from the bottom and freely penetrate the stacking bottom plate and the stacking elements arranged on the stacking bottom plate in turn to limit the stacking elements.

[0009] In this scheme, the guide device drives the lifting platform and the guide rod to lift and lower through the lifting driver, realizing automatic lifting and guiding, which is convenient for automatically adjusting the appropriate position of the guide rod according to the height of the multi-layer stacking elements, and the guiding efficiency is high. And the lifting is relatively stable, which is conducive to the guiding stability. The guide rod rises from the bottom and freely penetrates the stacking bottom plate and the stacking elements arranged on the stacking bottom plate in turn, and accurately determines the relative spatial coordinate information of the stacking element relative to the stacking bottom plate in a penetrating manner. This hole-axis matching (that is, the core hole of the stacking element matches the guide rod) guide positioning method makes the channel formed by the core hole of each layer of stacking elements not easy to deviate, has good consistency, and small error, which improves the accuracy and reliability of positioning, and can avoid collision with the stacking elements and affect the assembly quality. The upper and lower stacking elements are guided by the same guide rod, which is conducive to the consistency of the upper and lower layer positioning.

[0010] Preferably, the guide device also includes a guide fixing plate, which is arranged parallel to the bottom of the stacking bottom plate, and the guide rod is used to freely penetrate the guide fixing plate, the stacking bottom plate and the stacking element arranged on the stacking bottom plate in sequence along the vertical direction.

[0011] In the present solution, the guide rod is passed through the stacking base plate and the guide fixing plate which are parallel to each other and located above and below the mounting platform, so as to limit the rod body of the guide rod at two different upper and lower positions, thereby reducing the length of the free end of the guide rod (i.e., the protruding part of the guide rod used to guide the stacking elements), improving the stability of the guide rod when it is lifted or lowered, and preventing it from swinging or wobbling, which is beneficial to the accuracy of the guidance and reduces the processing accuracy requirements for the guide rod and related components.

[0012] Preferably, the guide fixing plate is connected to the stacking bottom plate via a positioning member.

[0013] In this solution, the stacking base plate and the guide fixing plate are connected by the positioning piece, which enhances the stability of the overall structure, is beneficial to the guiding stability, and also ensures the accuracy between the guide rod and the stacking base plate.

[0014] Preferably, the guide fixing plate is provided with a guide hole, a guide sleeve is clamped in the guide hole, and the guide rod freely passes through the inner hole of the guide sleeve.

[0015] In this solution, the guide sleeve facilitates the guide rod to pass through the guide fixing plate, and also facilitates the adjustment of the radial clearance between the guide rod and the guide hole so that it matches the radial clearance at other positions on the guide rod to achieve a better guiding effect.

[0016] Preferably, the guide rod is detachably connected to the lifting platform via a snap-fit ​​structure, the snap-fit ​​structure includes a male head and a female head, the male head is detachably connected to the lifting platform, the bottom end of the guide rod is inserted into the inner hole of the female head and is rotatably connected to the female head, the male head and the female head are detachably matched to limit the axial movement of the guide rod.

[0017] In this solution, the guide rod can be easily disassembled from the lifting platform and replaced through the snap-on structure, and the use method is more flexible. The guide rod and the female head are rotatably connected, so that the radial spacing between the guide rod and the female head can be adjusted according to the radial spacing between the guide rod and the guide sleeve to maintain consistency, which is conducive to the accuracy of the guidance. Through the cooperation of the male head and the female head, the axial movement of the guide rod is restricted, and the guide rod is fixed on the lifting platform. The fixing method of the guide rod can effectively improve the stability of the guide rod pressure rod, and at the same time can reduce the requirements for the processing accuracy of the guide rod related components on the platform.

[0018] Preferably, the guiding device further comprises a guide rail arranged along the vertical direction, a slider is installed on the lifting platform, and the slider is slidably connected to the guide rail along the vertical direction.

[0019] In this solution, the guide device realizes lifting and lowering movement by sliding through the sliding connection of the slider and the guide rail, so the movement is smoother and the guide is not easily offset.

[0020] Preferably, a rack is provided on the guide rail, and the output end of the lifting drive is connected to a gear matched with the rack, and the lifting drive drives the gear to mesh and roll on the rack.

[0021] In this solution, the movement of the lifting drive on the guide rail is achieved by meshing and rolling, and the lifting height can be accurately controlled by controlling the number of meshing teeth, thereby facilitating the adjustment of the lifting height of the guide rod.

[0022] Preferably, the lifting platform is provided with a plurality of guide rods, the stacking base plate is provided with a plurality of annular arrangement units distributed from the center to the outside, each of the annular arrangement units includes a plurality of mounting holes, at least one mounting hole in each of the annular arrangement units is provided with a guide rod, and the guide rod passes through the mounting hole and the core hole of the stacking element in sequence.

[0023] In this solution, by cooperating with the guide rod, the mounting holes in each annular arrangement unit can ensure that each annular arrangement unit from the inside to the outside of the stacking base has at least one mounting hole guided and limited by the guide rod, accurately positioned, and can be used as a positioning reference to assemble other stacking elements, thereby achieving accurate positioning of each stacking element.

[0024] Preferably, a plurality of the guide rods are distributed in a straight line on the lifting platform, freely passing through the mounting holes of the stacking bottom plate in a straight line from the center to the outside.

[0025] In this solution, several guide rods are distributed in a straight line and pass through the mounting holes in a straight line from the center to the outside of the stacking base plate. While ensuring that at least one mounting hole of each annular arrangement unit is limited by the guide rod, the number of guide rods will not be too large, thereby making the guide device structure simple and reliable.

[0026] An assembly platform comprises a mounting platform for a nuclear reactor and a stacking base plate arranged on the mounting platform. The stacking base plate is used for assembling stacking elements layer by layer. A guide device as described above is also arranged below the mounting platform.

[0027] In this scheme, the assembly platform realizes automatic lifting and guiding through the above-mentioned guiding device, which is convenient for automatically adjusting the appropriate position of the guiding rod according to the height of the multi-layer stacking elements, and the guiding efficiency is high. And the lifting and lowering is relatively stable, which is conducive to the guiding stability. The guide rod rises from the bottom and freely penetrates the stacking bottom plate and the stacking elements arranged on the stacking bottom plate in turn, and the relative spatial coordinate information of the stacking element relative to the stacking bottom plate is accurately determined in a penetrating manner. This hole-axis matching (that is, the core hole of the stacking element matches the guide rod) guiding and positioning method makes the channel formed by the core hole of each layer of stacking elements not easy to deviate, has good consistency, and small error, thereby improving the accuracy and reliability of positioning, and can avoid collision with the stacking elements to affect the assembly quality. The upper and lower layers of stacking elements are guided by the same guide rod, which is conducive to the consistency of positioning of the upper and lower layers.

[0028] The positive and progressive effect of the utility model is that the guide device and the assembly platform including the guide device realize automatic lifting and guiding, which is convenient for automatically adjusting the appropriate position of the guide rod according to the height of the multi-layer stacked elements, and the guiding efficiency is high. And the lifting and lowering are relatively stable, which is conducive to the guiding stability. The guide rod accurately determines the relative spatial coordinate information of the stacked elements relative to the stacked bottom plate in a penetrating manner, so that the channel formed by the core holes of each layer of stacked elements is not easy to deviate, has good consistency, and small errors, thereby improving the accuracy and reliability of positioning, and can avoid collisions with stacked elements and affecting the assembly quality. The upper and lower layers of stacked elements are guided by the same guide rod, which is conducive to the consistency of positioning of the upper and lower layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the installation structure of the installation platform of the embodiment of the utility model in a factory building.

[0030] Figure 2 It is a side sectional view of the installation platform of the embodiment of the utility model.

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the installation platform of the embodiment of the utility model.

[0032] Figure 4 It is a schematic diagram of the partial structure of the installation platform of the embodiment of the utility model.

[0033] Figure 5 It is a schematic diagram of the partial structure of the guide device of an embodiment of the utility model.

[0034] Figure 6 This is a structural schematic diagram of a guide rod in an embodiment of the utility model that is connected through a lifting platform and a guide fixing plate.

[0035] Figure 7 It is a structural schematic diagram of the connection between the guide rod and the female head of the buckle structure in an embodiment of the utility model.

[0036] Description of reference numerals:

[0037] Installation Platform 1

[0038] Stacking base plate 2

[0039] Positioning hole 21

[0040] Ring arrangement unit 22

[0041] Mounting hole 23

[0042] Stacking element 3

[0043] Positioning piece 4

[0044] Prominent structure 5

[0045] Measurement mark 6

[0046] Buckle structure 7

[0047] Male 71

[0048] Female 72

[0049] Leveling pad 8

[0050] Lifting drive 10

[0051] Gear 101

[0052] Guide rod 11

[0053] Lifting platform 12

[0054] Guide Rail 121

[0055] Slider 123

[0056] Rack 122

[0057] Guide fixing plate 13

[0058] Guide hole 131

[0059] Guide sleeve 14

[0060] Controller 15

[0061] Factory foundation pit 16

[0062] Factory floor 17 DETAILED DESCRIPTION

[0063] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0064] The present embodiment provides a guiding device for guiding the assembly of multi-layer stacking elements. The guiding device of the present embodiment is specifically used in the installation of a nuclear reactor to guide the assembly of the stacking element 3 used in the nuclear reactor. The stacking element 3 is specifically a cylindrical graphite rod. Graphite is a common neutron moderator and plays an important role in nuclear reactors. The graphite rod is processed with a through core hole for easy guidance and positioning. However, the stacking element 3 is not limited to graphite. Depending on the application of nuclear reactors or other different fields, the stacking element 3 can also be other materials besides graphite. During assembly, the stacking element 3 is assembled layer by layer on the stacking base plate 2.

[0065] like Figure 1-Figure 7 As shown, the guide device includes a lifting drive 10, a lifting platform 12 and at least one guide rod 11 vertically arranged on the lifting platform 12. The lifting drive 10 is connected to the lifting platform 12, and drives the lifting platform 12 to drive the guide rod 11 to vertically lift and lower. The guide rod 11 is used to rise from the bottom and freely penetrate the stacking bottom plate 2 and the stacking element 3 arranged on the stacking bottom plate 2 in sequence to limit the stacking element 3.

[0066] Specifically, in this embodiment, the guide device is installed in the foundation pit 16 of the nuclear reactor building, and an installation platform 1 is provided on the floor 17 of the building. A stacking base plate 2 is provided on the installation platform 1. The stacking base plate 2 is installed on the installation platform 1 through three spaced positioning members 4. The installation platform 1 is spaced and surrounded by three protruding structures 5 outside the stacking base plate 2. The protruding structure 5 is provided with a measurement mark 6. The measurement mark 6 is used to cooperate with the measuring equipment provided above the installation platform 1 to determine the reference space coordinate information of the stacking base plate 2; the guide rod 11 passes through the stacking base plate 2 and the stacking element 3 on the stacking base plate 2, and limits the stacking element 3 to determine the relative space coordinate information of the stacking element 3 to be assembled relative to the stacking base plate 2. The stacking base plate 2 can also adjust the height by three leveling pads 8 provided on the installation platform 1, so that the stacking base plate 2 remains level as a whole. In other embodiments, the structure for positioning the stacking element 3 on the guide device can also adopt other positioning structures, and is not limited to the measurement mark 6 on the installation platform 1 in this embodiment to achieve positioning.

[0067] The guide device drives the lifting platform 12 and the guide rod 11 to lift and lower through the lifting driver 10, realizing automatic lifting and guiding, facilitating automatic adjustment of the appropriate position of the guide rod 11 according to the height of the multi-layer stacking element 3, and having high guiding efficiency. Moreover, the lifting and lowering is relatively stable, which is conducive to guiding stability. The guide rod 11 rises from the bottom and freely penetrates the stacking bottom plate 2 and the stacking element 3 arranged on the stacking bottom plate 2 in sequence, and accurately determines the relative spatial coordinate information of the stacking element 3 relative to the stacking bottom plate 2 in a penetrating manner. This hole-axis matching (i.e., the core hole of the stacking element 3 matches the guide rod 11) guide positioning mode makes the channel formed by the core hole of each layer of the stacking element 3 not easy to deviate, has good consistency, and small error, thereby improving the accuracy and reliability of positioning, and can avoid collision with the stacking element 3 and affecting the assembly quality. The upper and lower stacking elements 3 are guided by the same guide rod 11, which is conducive to the consistency of positioning of the upper and lower layers.

[0068] Among them, Figure 1-Figure 4As shown, the guide device further includes a guide fixing plate 13, which is arranged parallel to the bottom of the stacking bottom plate 2, and a controller 15 is arranged on the guide fixing plate 13 for controlling the lifting action of the guide device; the guide rod 11 is used to freely penetrate the guide fixing plate 13, the stacking bottom plate 2 and the stacking element 3 arranged on the stacking bottom plate 2 in sequence along the vertical direction. The guide rod 11 passes through the stacking bottom plate 2 and the guide fixing plate 13 which are parallel to each other and located above and below the mounting platform 1, and the rod body of the guide rod 11 is limited at two different upper and lower positions, thereby reducing the length of the free end of the guide rod 11 (that is, the protruding part of the guide rod 11 for guiding the stacking element 3), improving the stability of the guide rod 11 when it is lifted and lowered, and not easy to swing or shake, which is conducive to the accuracy of guidance and reduces the processing accuracy requirements for the guide rod 11 and related components.

[0069] The guide fixing plate 13 is connected to the stacking bottom plate 2 through the positioning member 4. Figure 3 and Figure 4 As shown, the positioning member 4 is specifically a positioning pin, one end of which is thicker and the other end is thinner; the thick end passes through the positioning hole 21, is connected to the stacking bottom plate 2, and is partially embedded in the mounting platform 1 that carries the stacking bottom plate 2, fixing the stacking bottom plate 2 on the mounting platform 1; the thin end is connected to the guide fixing plate 13, and is partially embedded in the mounting platform 1, fixing the guide fixing plate 13 on the mounting platform 1. The stacking bottom plate 2 and the guide fixing plate 13 are connected by the positioning member 4, which enhances the stability of the overall structure, thereby facilitating the guiding stability and ensuring the accuracy between the guide rod 11 and the stacking bottom plate 2. Among them, the two ends of the positioning pin adopt different diameters, and the size difference is used to position and connect the stacking top plate and the guide fixing plate 13 respectively, without the need for threaded connection, so the connection method is simple.

[0070] In other embodiments, the shape and size of the positioning member 4 can be adjusted accordingly according to the matching needs of the specific structure. The object connected by the positioning member 4 between the stacking bottom plate 2 and the guide fixing plate 13 is not limited to the installation platform 1, and can also be other structural components. For example, the stacking bottom plate 2 and the guide fixing plate 13 are connected to the two components respectively, and the middle section of the positioning member 4 runs through the two components, and its two ends are still connected to the stacking bottom plate 2 and the guide fixing plate 13, so that the stacking bottom plate 2 and the guide fixing plate 13 can be separated by a larger distance in height, further improving the compression rod stability of the guide rod 11.

[0071] Among them, Figure 4As shown, the guide fixing plate 13 is provided with a guide hole 131, and a guide sleeve 14 is clamped in the guide hole 131, and the guide rod 11 freely passes through the inner hole of the guide sleeve 14. The guide sleeve 14 facilitates the guide rod 11 to pass through the guide fixing plate 13, and also facilitates the adjustment of the radial clearance between the guide rod 11 and the guide hole 131, so as to match the radial clearance at other positions on the guide rod 11, thereby achieving a better guiding effect.

[0072] Among them, Figure 5 and Figure 7 As shown, the guide rod 11 is detachably connected to the lifting platform 12 through a buckle structure 7. The buckle structure 7 includes a male head 71 and a female head 72. The male head 71 is detachably connected to the lifting platform 12. The bottom end of the guide rod 11 is inserted into the inner hole of the female head 72 and is rotatably connected to the female head 72. The male head 71 is stuck in the middle section of the female head 72, and the bottom end of the guide rod 11 can be clamped to limit the axial movement of the guide rod 11. Through the buckle structure 7, the guide rod 11 can be easily disassembled from the lifting platform 12 for replacement, and the use method is more flexible. The guide rod 11 and the female head 72 are rotatably connected, so that the guide rod 11 can adjust the radial spacing between the female head 72 and the guide sleeve 14 according to the radial spacing between the guide rod 11 and the female head 72, so as to maintain consistency, which is conducive to the accuracy of the guide. Through the cooperation of the male head 71 and the female head 72, the axial movement of the guide rod 11 is limited, and the guide rod 11 is fixed on the lifting platform 12. The fixing method of the guide rod 11 can effectively improve the pressure rod stability of the guide rod 11 and can also reduce the requirements on the processing accuracy of the components related to the guide rod 11 on the platform.

[0073] Among them, Figure 5 As shown, the guide device also includes a guide rail 121 arranged in the vertical direction, and a slider 123 is installed on the lifting platform 12, and the slider 123 is slidably connected with the guide rail 121 in the vertical direction. The guide device realizes lifting and lowering movement in a sliding manner through the sliding connection between the slider 123 and the guide rail 121, and the movement is smoother and the guide is not easy to deviate.

[0074] Among them, Figure 5 As shown, a rack 122 is provided on the guide rail 121, and the output end of the lifting driver 10 is connected to a gear 101 that matches the rack 122. The lifting driver 10 drives the gear 101 to mesh and roll on the rack 122, so as to realize the movement of the lifting driver 10 on the guide rail 121 in a meshing and rolling manner. The lifting height can be precisely controlled by controlling the number of meshing teeth, thereby making it easy to adjust the lifting height of the guide rod 11.

[0075] Among them, Figure 2 , Figure 3 and Figure 5As shown, a plurality of guide rods 11 are provided on the lifting platform 12, and a plurality of annular arrangement units 22 are distributed from the center to the outside of the stacking base plate 2, each annular arrangement unit 22 includes a plurality of mounting holes 23, and at least one mounting hole 23 in each annular arrangement unit 22 is configured with a guide rod 11 passing through it.

[0076] The number of guide rods 11 can be adjusted as needed. For example, when assembling the stacking element 3 on each annular arrangement unit 22, according to different assembly orders, several guide rods 11 can be configured on the mounting holes 23 at different positions, or even each mounting hole 23 is configured with a guide rod 11. However, considering not increasing the complexity of the structure and the cost, a better choice is that one mounting hole 23 in each annular arrangement unit 22 is configured with a guide rod 1111, so as to ensure that at least one mounting hole 23 of each annular arrangement unit 22 from the inside to the outside of the stacking base plate 2 is guided and limited by the guide rod 11, accurately positioned, and can be used as a positioning reference to assemble other stacking elements 3, thereby achieving accurate positioning of each stacking element 3. In other embodiments, the number of guide rods 11 can be at least one, which can be set at the most central mounting hole 23 of the stacking base plate 2, so as to install the most central stacking element 3, and use the most central stacking element 3 as a reference, and then use the outer shape structure of the stacking element 3 to fit other stacking elements 3 to the most central stacking element 3 as a reference, and then install other stacking elements 3 in sequence.

[0077] Furthermore, a plurality of guide rods 11 are distributed in a straight line on the lifting platform 12, and freely penetrate the mounting holes 23 in a straight line from the center to the outside of the stacking base plate 2. Such an arrangement ensures that each annular arrangement unit 22 has at least one mounting hole 23 limited by the guide rod 11, while the number of guide rods 11 will not be too large, thereby making the guide device structure simple and reliable.

[0078] This embodiment also provides an assembly platform, such as Figure 1As shown, the assembly platform includes a nuclear reactor installation platform 1, a stacking base plate 2 arranged on the installation platform 1, and the above-mentioned guide device. The installation platform 1 is built on the plant floor 17, and below the plant floor 17 is a plant foundation pit 16. The stacking base plate 2 is arranged above the installation platform 1, and the stacking base plate 2 is connected to the installation platform 1 through three positioning members 4 arranged at intervals in an annular manner. The stacking base plate 2 is used to assemble the stacking elements 3 layer by layer; the guide device is arranged in the plant foundation pit 16 below the installation platform 1. The assembly platform realizes automatic lifting and guiding through the above-mentioned guide device, which is convenient for automatically adjusting the appropriate position of the guide rod 11 according to the height of the multi-layer stacking element 3, and the guiding efficiency is high. And the lifting and lowering are relatively stable, which is conducive to the guiding stability. The guide rod 11 rises from the bottom and freely penetrates the stacking bottom plate 2 and the stacking element 3 arranged on the stacking bottom plate 2 in sequence, and accurately determines the relative spatial coordinate information of the stacking element 3 relative to the stacking bottom plate 2 in a penetrating manner. This hole-axis matching (i.e., the core hole of the stacking element 3 matches the guide rod 11) guide positioning mode makes the channel formed by the core hole of each layer of the stacking element 3 not easy to deviate, has good consistency, and small error, thereby improving the accuracy and reliability of positioning, and can avoid collision with the stacking element 3 and affecting the assembly quality. The upper and lower layers of the stacking elements 3 are guided by the same guide rod 11, which is conducive to the consistency of the upper and lower layer positioning.

[0079] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A guiding device for guiding the assembly of multi-layer stacking elements, wherein the stacking elements are installed layer by layer on a stacking bottom plate, characterized in that: The guide device includes a lifting drive, a lifting platform and at least one guide rod vertically arranged on the lifting platform. The lifting drive is connected to the lifting platform and drives the lifting platform to drive the guide rod to vertically lift and lower. The guide rod is used to rise from the bottom and freely penetrate the stacking bottom plate and the stacking elements arranged on the stacking bottom plate in sequence to limit the stacking elements.

2. The guide device according to claim 1, characterized in that: The guide device also includes a guide fixing plate, which is arranged parallel to the bottom of the stacking base plate. The guide rod is used to freely penetrate the guide fixing plate, the stacking base plate and the stacking element arranged on the stacking base plate in sequence along the vertical direction.

3. The guide device according to claim 2, characterized in that: The guide fixing plate is connected to the stacking bottom plate through a positioning member.

4. The guide device according to claim 2, characterized in that: The guide fixing plate is provided with a guide hole, a guide sleeve is clamped in the guide hole, and the guide rod freely passes through the inner hole of the guide sleeve.

5. The guide device according to claim 1 or 4, characterized in that: The guide rod is detachably connected to the lifting platform via a snap-fit ​​structure, wherein the snap-fit ​​structure comprises a male head and a female head, wherein the male head is detachably connected to the lifting platform, wherein the bottom end of the guide rod is inserted into the inner hole of the female head and is rotatably connected to the female head, wherein the male head and the female head are detachably matched to limit the axial movement of the guide rod.

6. The guide device according to claim 1, characterized in that: The guide device also includes a guide rail arranged along the vertical direction. A slider is installed on the lifting platform. The slider is slidably connected to the guide rail along the vertical direction.

7. The guide device according to claim 6, characterized in that A rack is provided on the guide rail, and a gear matched with the rack is connected to the output end of the lifting driver, and the lifting driver drives the gear to mesh and roll on the rack.

8. The guide device according to claim 1, characterized in that: The lifting platform is provided with a plurality of guide rods, and the stacking bottom plate is provided with a plurality of annular arrangement units distributed from the center to the outside, each of the annular arrangement units includes a plurality of mounting holes, and at least one mounting hole in each of the annular arrangement units is provided with a guide rod therethrough, and the guide rod passes through the mounting hole and the core hole of the stacking element in sequence.

9. The guide device according to claim 8, characterized in that A plurality of guide rods are distributed in a straight line on the lifting platform and freely penetrate the mounting holes of the stacking bottom plate in a straight line from the center to the outside.

10. An assembly platform, comprising a mounting platform of a nuclear reactor and a stacking base plate arranged on the mounting platform, wherein the stacking base plate is used to assemble stacking elements layer by layer, characterized in that: A guide device as described in any one of claims 1 to 9 is also provided below the installation platform.

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