Reactor core plate structure

Abstract

The utility model discloses a reactor core plate structure which comprises a supporting piece, at least two thickening pieces arranged in an axial symmetry mode and a brake mechanism used for controlling the distance between the supporting piece and each thickening piece, the thickening pieces are connected to the supporting piece in an inserted mode, and the brake mechanism is installed between the supporting piece and the thickening pieces. Due to the fact that the initial compression amount of the compression spring or the plate spring is reduced, after the new fuel assembly grows, the compression spring or the plate spring has a larger compression space, and the grown new fuel assembly has more growth space. Furthermore, the pressing force of the fuel assembly at the beginning of the life is compensated in a targeted manner by combining the mode of locally thickening the reactor core plate through the thickening piece and reducing the rigidity of a full-reactor-core fuel assembly pressing spring or a plate spring, meanwhile, the pressing of the full-life fuel assembly is ensured, the bending risk of the fuel assembly caused by the too large pressing force of the fuel assembly is effectively reduced, and the service life of the fuel assembly is prolonged. The service life of the fuel assembly is prolonged, the safety is improved, and the cost in the production process is saved.

Description

Technical Field

[0001] This utility model relates to the field of nuclear reactor technology, and in particular to a reactor core plate structure. Background Technology

[0002] In a pressurized water reactor, the lower fuel assembly mounts sit on the lower core plate, while the upper core plate presses against the fuel assembly clamping system. During operation, due to differences in neutron flux in different regions, the skeletal growth of fuel assemblies varies at different locations. Irradiated fuel assemblies grow larger than newly loaded fuel assemblies, resulting in differences in the compression of the clamping system and consequently, significant variations in clamping force.

[0003] In some technologies, the thickness of the upper and lower core plates in pressurized water reactors is a fixed value. When the fuel assemblies are grown under different irradiation conditions, in order to ensure the fuel assemblies are compressed, the initial compression of the compression springs needs to conservatively consider the compression of the minimum height fuel assembly, i.e., the new fuel assembly.

[0004] Therefore, if the clamping force on the fuel assembly at the end of its service life is too conservative, it is easy to cause the fuel assembly to bend, which will affect the service life of the fuel assembly and increase production costs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a core plate structure.

[0006] The technical solution adopted by this utility model to solve its technical problem is: to construct a core plate structure, including: a support member and at least two axisymmetrically arranged thickened members, and a braking mechanism for controlling the distance between the support member and each of the thickened members, wherein the thickened members are inserted into the support member, and the braking mechanism is installed between the support member and the thickened members;

[0007] The braking mechanism includes a brake column and a locking assembly. The brake column is mounted on a thickened member. A brake hole is provided on the support member. The brake column is installed in the brake hole. The locking assembly is installed between the brake hole and the brake column.

[0008] Furthermore, the thickening component includes a thickening block and a connecting rod. The connecting rod is installed on the bottom surface of the thickening block. The support component has a positioning hole, and the connecting rod is inserted into the positioning hole to prevent the thickening block from moving horizontally.

[0009] Furthermore, the brake pin is inserted into the thickened block, and the locking assembly is a threaded pair disposed between the brake hole and the brake pin.

[0010] Furthermore, the bottom end of the brake column is provided with a groove in the shape of a line, a cross, or a regular hexagon.

[0011] Furthermore, the brake column is fixedly or detachably connected to the thickened member. The brake column has a through hole opening from the bottom. The side wall of the brake column has multiple spaced first adjustment holes. The inner wall of the brake hole of the support member also has a second adjustment hole corresponding to the first adjustment hole. The locking component is inserted into the through hole and is respectively inserted into different first adjustment holes and second adjustment holes to adjust the position of the brake column.

[0012] Furthermore, the locking assembly includes: two locking blocks arranged opposite each other, a locking rod fixed on the locking blocks, a top block clamped between the two locking blocks and positioning them, and an elastic element clamped between the two locking blocks to press the locking rod into the first adjustment hole and the second adjustment hole.

[0013] Furthermore, both locking blocks are provided with vertically arranged sliding grooves, and the side of the top block slides along the sliding grooves; or the two sides of the top block are provided with vertically arranged sliding grooves, and the two locking blocks are provided with corresponding protrusions or at least two protrusions, which slide within the sliding grooves.

[0014] Furthermore, the edges of the thickened block are provided with chamfers or rounded corners.

[0015] Furthermore, a positioning pin is installed on the support member, and an anti-slip groove is provided at the top of the thickened member.

[0016] Furthermore, the support member is provided with a groove to accommodate the thickened block.

[0017] The following are the beneficial effects of implementing this utility model:

[0018] This application utilizes a thickened component inserted into the support member to reduce the distance between the support member and the new fuel assembly. Under the same compression spring, the new fuel assembly on the thickened component receives a greater compression force. This allows for a reduction in the initial compression of the entire core fuel assembly's compression springs. By adjusting parameters such as the number of leaf springs, leaf spring thickness, tilt section thickness ratio, leaf spring width, or leaf spring height, the overall initial spring compression force can be reduced, achieving a suitable design stiffness. This reduces the initial compression of the compression springs or leaf springs. Immediately after the new fuel assembly is loaded into the reactor, the thickened component allows for a stable compression force to be obtained with a relatively small initial compression of the compression springs or leaf springs. Fuel assemblies that have not been replaced, due to irradiation and their longer length, do not require the addition of a thickened component. Furthermore, fuel assemblies that have not been replaced... The length of the fuel assembly itself, in conjunction with the support components, is subject to a stable clamping force. After the new fuel assembly undergoes irradiation and skeletal growth, it acts on the clamping springs or leaf springs through the support components and thickened components. Because the initial compression of the clamping springs or leaf springs is reduced, they have a larger compression space after the new fuel assembly grows, allowing the grown fuel assembly to have more growth space. Furthermore, by combining the local thickening of the core plate with the reduction of the stiffness of the clamping springs or leaf springs of the entire core fuel assembly, the clamping force of the fuel assembly at the beginning of its lifespan is specifically compensated, while ensuring the clamping of the fuel assembly throughout its lifespan. This effectively reduces the risk of fuel assembly bending caused by excessive clamping force, extends the service life of the fuel assembly, improves safety, and saves costs in the production process. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] In the attached image:

[0021] Figure 1 This is a schematic diagram of the core plate structure in some embodiments of this utility model;

[0022] Figure 2 This is a cross-sectional schematic diagram of the braking mechanism in this utility model;

[0023] Figure 3 This is a schematic diagram of the connecting rod and brake column in this utility model;

[0024] Figure 4 This is a cross-sectional schematic diagram of the locking component in this utility model;

[0025] Figure 5 This is a structural schematic diagram of the locking block and locking rod in this utility model.

[0026] Explanation of markings in the diagram

[0027] Support component 1, positioning hole 11, braking hole 12, recess 13, thickened component 2, thickened block 21, connecting rod 22, anti-slip groove 23, braking mechanism 3, braking column 31, locking assembly 32, locking block 321, locking rod 322, elastic component 323, top block 324, through hole 33, first adjustment hole 34, second adjustment hole 35, positioning pin 4. Detailed Implementation

[0028] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0029] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" 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 or an electrical connection; 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. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0031] Please see Figures 1 to 4 The core plate structure in the first embodiment of this utility model includes: a support member 1 and at least two axially symmetrically arranged thickened members 2, and a braking mechanism 3 for controlling the distance between the support member 1 and each thickened member 2. The thickened members 2 are inserted into the support member 1, and the braking mechanism 3 is installed between the support member 1 and the thickened members 2. The braking mechanism 3 includes: a braking pin 31 and a locking assembly 32. The braking pin 31 is installed on the thickened members 2. A braking hole 12 is opened on the support member 1. The braking pin 31 is installed in the braking hole 12, and the locking assembly 32 is installed between the braking hole 12 and the braking pin 31.

[0032] Among them, at least two symmetrically arranged thickened parts 2 can more easily level the new fuel assembly placed on the thickened parts 2. By adjusting the distance between different thickened parts 2 and the support 1, the tilt of the new fuel assembly placed on it can be adjusted in various directions, so that the new fuel assembly can be subjected to more uniform force, reduce the bending of the new fuel assembly, and extend the service life of the new fuel assembly.

[0033] The thickened component 2 can also be directly installed on the support component 1 by welding or bolting, making the connection between the support component 1 and the thickened component 2 tighter, thus having better load-bearing capacity. This makes the load-bearing of the support component 1 and the thickened component 2 more stable and improves the load-bearing capacity. The support component 1 can be an old core plate. Welding the thickened component 2 directly onto the old core plate can save manufacturing costs, improve manufacturing efficiency, and is more environmentally friendly. It can also reduce the gap between the support component 1 and the thickened component 2, prevent corrosion of the support component 1 and the thickened component 2, and extend their service life.

[0034] The support component 1 can be circular, rectangular, or polygonal. Different shapes of support components 1 are selected according to the on-site usage. Rectangular support components 1 are easier to manufacture and process, saving manufacturing costs, while circular support components 1 can withstand greater compressive force, making the fuel assembly installed on the support component 1 more uniformly stressed and reducing deformation.

[0035] Similarly, the thickening part 2 can also be circular, rectangular or polygonal. The shape of the thickening part 2 can be selected according to the on-site usage. The rectangular thickening part 2 is easier to find the reference and can be processed more accurately on the support 1 to correspond to the position of the new fuel assembly. The circular or polygonal thickening part 2 is selected according to the shape of the support 1, which is convenient for processing and manufacturing, easy to find the processing reference, and easy to manufacture.

[0036] By installing the locking assembly 32 between the brake hole 12 and the brake column 31, the core plate structure can look cleaner. Compared with the outer surface, it can delay the corrosion of the locking assembly 32 and extend its service life. The locking assembly 32 can adjust the distance between the thickened part 2 and the support part 1. According to the actual use, the distance between the thickened part 2 and the support part 1 can be changed to adjust the thickened part 2 to the most suitable position with the new fuel assembly, further reducing the risk of bending of the new fuel assembly. It is suitable for more usage scenarios and is more diversified.

[0037] This application uses a thickened part 2 inserted into a support part 1, and a braking mechanism 3 is installed between the support part 1 and the thickened part 2. The braking mechanism 3 includes a brake pin 31 and a locking assembly 32. The brake pin 31 is installed on the thickened part 2. A brake hole 12 is provided on the support part 1. The brake pin 31 is installed in the brake hole 12. The locking assembly 32 is installed between the brake hole 12 and the brake pin 31. By inserting the thickened component 2 onto the support component 1, the distance between the support component 1 and the new fuel assembly is reduced. Under the same compression spring, the new fuel assembly on the thickened component 2 will receive a greater compression force. This allows for a reduction in the initial compression of the entire core fuel assembly's compression spring. By adjusting parameters such as the number of leaf springs, leaf spring thickness, tilt section thickness ratio, leaf spring width, or leaf spring height, the overall initial spring compression force can be reduced, achieving a suitable design stiffness. This reduces the initial compression of the compression springs or leaf springs. Immediately after the new fuel assembly is loaded into the reactor, the thickened component 2 allows for a stable compression force even with a relatively small initial compression of the compression springs or leaf springs. Fuel assemblies that have not been replaced, due to irradiation and their longer length, do not require the addition of the thickened component 2. Its own length will cooperate with support member 1 and be subject to stable clamping force. After the new fuel assembly is irradiated, the skeleton grows and acts on the clamping spring or leaf spring through support member 1 and thickening member 2. Since the initial compression of the clamping spring or leaf spring is reduced, the clamping spring or leaf spring has a larger compression space after the new fuel assembly grows, so that the new fuel assembly has more growth space. Then, by combining the local thickening of the core plate by thickening member 2 with the reduction of the stiffness of the clamping spring or leaf spring of the whole core fuel assembly, the clamping force of the fuel assembly at the beginning of its service life is specifically compensated, while ensuring the clamping of the fuel assembly throughout its service life. This effectively reduces the risk of fuel assembly bending caused by excessive clamping force, extends the service life of the fuel assembly, improves safety, and saves costs in the production process.

[0038] Please see Figure 2 and Figure 3 In some embodiments, the thickening member 2 includes a thickening block 21 and a connecting rod 22. The connecting rod 22 is installed on the bottom surface of the thickening block 21. The support member 1 has a positioning hole 11, and the connecting rod 22 is inserted into the positioning hole 11 to prevent the thickening block 21 from moving horizontally.

[0039] This application utilizes a thickening component 2, comprising a thickening block 21 and a connecting rod 22. The connecting rod 22 is mounted on the bottom surface of the thickening block 21. A positioning hole 11 is provided on the support component 1, and the connecting rod 22 is inserted into the positioning hole 11 to prevent the thickening block 21 from moving horizontally. By utilizing the cooperation between the connecting rod 22 and the positioning hole 11, movement of the thickening block 21 in contact with the new fuel assembly can be prevented, thereby reducing vibration of the thickening block 21 during production. This results in more stable contact between the thickening block 21 and the new fuel assembly, reducing wear on the new fuel assembly, further extending the service life of the new fuel assembly, and improving stability and safety.

[0040] Please see Figure 2 and Figure 3 In some embodiments, the brake pin 31 is inserted into the thickened block 21, and the locking assembly 32 is a threaded pair disposed between the brake hole 12 and the brake pin 31.

[0041] This application uses a brake pin 31 to connect with a thickened block 21. The locking assembly 32 is a threaded pair provided between the brake hole 12 and the brake pin 31, which allows the brake pin 31 to rotate along its own axis on the thickened block 21. By utilizing the threaded pair between the brake hole 12 and the brake pin 31, the operator can rotate the brake pin 31 to move the thickened block 21 up and down, making the operation more convenient and reducing labor intensity.

[0042] By setting the pitch of the threaded pair between the brake hole 12 and the brake column 31, the distance between the thickened block 21 and the support 1 can be better controlled with each rotation, making it easier to adjust the thickened block 21 to a suitable height and improving the adjustment efficiency.

[0043] Please see Figure 2 and Figure 3 In some embodiments, the bottom end of the brake pin 31 is provided with a groove in the shape of a line, a cross, or a regular hexagon.

[0044] This application provides a slotted, cross-shaped, or hexagonal groove at the bottom of the brake column 31. By using a tool inserted into the groove, the operator can rotate the brake column 31 more easily and effortlessly, allowing the thickened block 21 to be moved to the desired height more quickly and conveniently. The slotted, cross-shaped, or hexagonal groove also prevents others from rotating the brake column 31, as it would be difficult to rotate the brake column 31 without the corresponding tool, further improving safety and making the distance between the thickened block 21 and the support member 1 more stable, preventing wear on the new fuel.

[0045] Please see Figure 4 and Figure 5In some embodiments, the brake column 31 is fixedly or detachably connected to the thickened member 2. The brake column 31 is provided with a through hole 33 opening from the bottom. The side wall of the brake column 31 is provided with a plurality of spaced first adjustment holes 34. The inner wall of the brake hole 12 of the support member 1 is also provided with a second adjustment hole 35 corresponding to the first adjustment hole 34. The locking component 32 is inserted into the through hole 33 and is respectively inserted into different first adjustment holes 34 and second adjustment holes 35 to adjust the position of the brake column 31.

[0046] The brake column 31 can be detachably connected to the thickened part 2 via threads. After the surface of the thickened part 2 is worn, it can be reused simply by replacing the thickened part 2, thereby saving maintenance costs and making replacement more convenient.

[0047] The first adjustment hole 34 and the second adjustment hole 35 can be through holes. The second adjustment hole 35 passes through the side wall of the support member 1, so that the operator can insert the locking component 32 into the first adjustment hole 34 and the second adjustment hole 35 from the side of the support member 1, thereby controlling the distance of the brake column 31 sliding in the brake hole 12, improving the adjustment efficiency and making the operation more convenient.

[0048] This application uses a brake pin 31 that is either fixedly or detachably connected to the thickened member 2. The brake pin 31 has a through hole 33 opening from the bottom. Multiple spaced first adjustment holes 34 are formed on the side wall of the brake pin 31. The inner wall of the brake hole 12 of the support member 1 also has second adjustment holes 35 corresponding to the first adjustment holes 34. The locking assembly 32 is inserted into the through hole 33 and, by being inserted into different first adjustment holes 34 and second adjustment holes 35, adjusts the position of the brake pin 31. The operator slides the brake pin 31 up and down to align the first adjustment holes 34 with the second adjustment holes 35. After alignment, the locking component 32 is inserted into the first adjustment hole 34 and the second adjustment hole 35. The locking component 32, the first adjustment hole 34 and the second adjustment hole 35 cooperate to control the brake pin 31 within the brake hole 12, so that the thickened part 2 and the support part 1 can be connected more tightly and can withstand greater clamping force. It can also further prevent displacement after the support part 1 and the thickened part 2 are locked, thus improving stability. The cooperation between the first adjustment hole 34 and the second adjustment hole 35 allows the operator to more quickly determine the distance between the support part 1 and the thickened part 2, which is convenient for adjustment.

[0049] Please see Figure 4 and Figure 5In some embodiments, the locking assembly 32 includes: two locking blocks 321 disposed opposite to each other, a locking rod 322 fixed on the locking blocks, a top block 324 clamped between the two locking blocks 321 and positioning them, and an elastic member 323 clamped between the two locking blocks 321 to press the locking rod 322 into the first adjustment hole 34 and the second adjustment hole 35.

[0050] This application utilizes a locking assembly 32 comprising: two opposing locking blocks 321, a locking rod 322 fixed to the locking blocks, a top block 324 clamping between and positioning the two locking blocks 321, and an elastic element 323 clamping between the two locking blocks 321 to press the locking rod 322 into the first adjustment hole 34 and the second adjustment hole 35. When adjusting the distance between the thickened member 2 and the support member 1, the operator uses needle-nose pliers to clamp the bottom ends of the two locking blocks 321, causing them to converge towards the center. This causes the two locking blocks 321 to move the locking rod 322. 2. After removing the first adjustment hole 34 and the second adjustment hole 35, the operator can slide the thickened part 2 and the brake column 31 up and down. When the appropriate position is reached, the first adjustment hole 34 and the other second adjustment holes 35 are aligned. When the operator releases the handle, the elastic part 323 allows the locking rod 322 to automatically insert into the first adjustment hole 34 and the second adjustment hole 35, locking the brake column 31 back into the brake hole 12. The adjustment is more effortless, and there are no through holes on the side wall, which can reduce the corrosion of the support part 1, extend the service life of the support part 1, make it look more beautiful, and improve the efficiency of adjustment.

[0051] Please see Figure 4 and Figure 5 In some embodiments, both locking blocks 321 are provided with vertically arranged grooves, and the side of the top block 324 slides along the grooves; or the two sides of the top block 324 are provided with vertically arranged grooves, and the two locking blocks 321 are provided with corresponding protrusions or at least two protrusions, which slide in the grooves.

[0052] This application utilizes two vertically oriented sliding grooves on each of the locking blocks 321, with the top block 324 sliding along the grooves on its side; alternatively, the top block 324 has vertically oriented sliding grooves on both sides, and the two locking blocks 321 have corresponding protrusions or at least two raised protrusions that slide within the grooves. After the locking rod 322 automatically inserts into the appropriate first adjustment hole 34 and second adjustment hole 35, the operator can slide the top block 324 between the two locking blocks 321 via the sliding grooves, preventing the two locking blocks 321 from closing together, further improving stability and safety, and ensuring safety during the production process.

[0053] Similarly, vertical grooves are provided on the two sides of the top block 324, and corresponding ribs or at least two protrusions are provided on the two locking blocks 321. The ribs or protrusions slide in the grooves. By using the ribs or at least two protrusions to cooperate with the vertical grooves on the two sides of the top block 324, the top block 324 can be installed more stably between the two locking blocks 321, which further improves stability and safety and ensures safety in the production process.

[0054] Please see Figure 1 and Figure 3 In some embodiments, the edges of the thickened block 21 are provided with chamfers or rounded corners.

[0055] This application provides chamfers or rounded corners at the edges of the thickened block 21. These chamfers or rounded corners prevent the edges of the thickened block 21 from scraping against the new fuel assembly during installation, thus preventing damage. This further protects the new fuel assembly, extending its service life. The chamfered or rounded corners of the thickened block 21 also reduce wear on the new fuel assembly during production, further extending its service life.

[0056] Please see Figure 1 and Figure 3 In some embodiments, a positioning pin 4 is installed on the support member 1, and an anti-slip groove 23 is provided at the top of the thickened member 2.

[0057] This application features a positioning pin 4 installed on the support 1 and an anti-slip groove 23 at the top of the thickened part 2. The positioning pin 4 assists the installer in installing the new fuel assembly on the support 1, improving installation efficiency. The anti-slip groove 23 reduces the displacement between the new fuel assembly and the thickened part 2 during the production process, thereby reducing frictional loss and further extending the service life of the new fuel assembly.

[0058] Please see Figure 1 and Figure 3 In some embodiments, the support member 1 is provided with a groove 13 for accommodating the thickened block 21.

[0059] This application provides a sink 13 on the support member 1 to accommodate the thickened block 21. The sink 13 can further shorten the distance between the thickened block 21 and the support member 1, thereby expanding the scope of use and making it suitable for more usage environments. It can also be applied to fuel assemblies after growth, making its use more diversified and suitable for more usage environments.

[0060] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A core plate structure, characterized in that, include: A support member (1) and at least two axisymmetrically arranged thickened members (2), and a braking mechanism (3) for controlling the distance between the support member (1) and each of the thickened members (2), wherein the thickened members (2) are inserted into the support member (1) and the braking mechanism (3) is installed between the support member (1) and the thickened members (2); The braking mechanism (3) includes a brake column (31) and a locking assembly (32). The brake column (31) is mounted on the thickened part (2). The support part (1) has a brake hole (12). The brake column (31) is installed in the brake hole (12). The locking assembly (32) is installed between the brake hole (12) and the brake column (31).

2. The core plate structure according to claim 1, characterized in that, The thickening component (2) includes a thickening block (21) and a connecting rod (22). The connecting rod (22) is installed on the bottom surface of the thickening block (21). The support component (1) has a positioning hole (11). The connecting rod (22) is inserted into the positioning hole (11) to prevent the thickening block (21) from moving horizontally.

3. The core plate structure according to claim 2, characterized in that, The brake pin (31) is inserted into the thickened block (21), and the locking assembly (32) is a threaded pair disposed between the brake hole (12) and the brake pin (31).

4. The core plate structure according to claim 3, characterized in that, The bottom end of the brake column (31) is provided with a groove in the shape of a line, a cross, or a regular hexagon.

5. The core plate structure according to claim 2, characterized in that, The brake column (31) is fixedly or detachably connected to the thickened part (2). The brake column (31) has a through hole (33) opening from the bottom. The side wall of the brake column (31) has a plurality of spaced first adjustment holes (34). The inner wall of the brake hole (12) of the support member (1) is also provided with a second adjustment hole (35) corresponding to the first adjustment hole (34). The locking assembly (32) is inserted into the through hole (33) and is inserted into different first adjustment holes (34) and second adjustment holes (35) respectively to adjust the position of the brake column (31).

6. The core plate structure according to claim 5, characterized in that, The locking assembly (32) includes: two locking blocks (321) arranged opposite to each other, a locking rod (322) fixed on the locking blocks, a top block (324) clamped between the two locking blocks (321) and positioning them, and an elastic element (323) clamped between the two locking blocks (321) to press the locking rod (322) into the first adjustment hole (34) and the second adjustment hole (35).

7. The core plate structure according to claim 6, characterized in that, Both locking blocks (321) are provided with vertically arranged sliding grooves, and the side of the top block (324) slides along the sliding groove; or the two sides of the top block (324) are provided with vertically arranged sliding grooves, and the two locking blocks (321) are provided with corresponding protrusions or at least two protrusions, and the protrusions or protrusions slide in the sliding groove.

8. The core plate structure according to claim 2, characterized in that, The thickened block (21) has chamfered or rounded edges.

9. The core plate structure according to claim 2, characterized in that, The support member (1) is equipped with a positioning pin (4), and the thickened member (2) has an anti-slip groove (23) at its top.

10. The core plate structure according to claim 2, characterized in that, The support member (1) is provided with a groove (13) for accommodating the thickened block (21).

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