Special tray for nuclear fuel pellets
By designing a nuclear fuel pellet tray with reinforcement body and positioning groove, the problems of poor rigidity and inability to stack existing trays are solved, and the high rigidity and automated storage turnover of the trays are achieved.
Patent Information
- Application Number
- CN202421543904.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The existing nuclear fuel pellet trays have poor rigidity and are prone to deformation. Since the single-layer corrugated plate structure cannot be stacked, it needs to be stored in a special material cabinet, which makes the pellet storage and turnover unable to be automated.
A special material tray for nuclear fuel core pellets is designed, including a layered carrier disk body and a reinforcement body arranged at the bottom of the carrier disk body. The carrier disk body is spaced apart in the X-axis direction. The bottom of the positioning groove is in contact with the reinforcement body, forming an upper V-shaped connection part to support the edge of the nuclear fuel core pellet, increasing the strength of the reinforcement body to prevent deformation, and stacking of the material trays through the positioning part.
It improves the rigidity and stackability of the material tray, prevents the material tray from deforming and falling off, realizes automatic storage and turnover of nuclear fuel pellets, and simplifies the operation process.
Smart Images
Figure CN222921947U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of temporary storage of nuclear fuel pellets, in particular to a special tray for nuclear fuel pellets. Background Art
[0002] Nuclear fuel pellets are the core part of nuclear fuel elements, generally in the shape of small cylindrical blocks. In the nuclear fuel assembly industry, after the fuel pellets are produced, they need to be stored and transported through trays. Currently, the commonly used trays are of single-layer corrugated board structure. When storing the pellets, the following problems exist: 1. The rigidity of the tray is poor, and deformation occurs during use; 2. Since the single-layer corrugated board structure is adopted, the trays cannot be stacked and need to be stored in a special storage cabinet; 3. Since the single-layer corrugated board structure is adopted, the trays cannot be stacked, resulting in the inability to automate the storage and transportation of the pellets. Summary of the Utility Model
[0003] Aiming at the technical problems existing in the prior art, the utility model provides a special tray for nuclear fuel pellets to solve the problems of poor rigidity of the tray, deformation during use, inability to stack due to the single-layer corrugated board structure, and the need for a special storage cabinet for storage, resulting in the inability to automate the storage and transportation of the pellets.
[0004] The technical solution for the utility model to solve the above technical problems is as follows: A special tray for nuclear fuel pellets, characterized in that it includes a load-bearing tray body that can be stacked layer by layer and a reinforcing body provided at the bottom of the load-bearing tray body to prevent the load-bearing tray body from deforming.
[0005] A number of positioning grooves extending in the Y-axis direction are arranged at intervals along the X-axis direction on the load-bearing tray body. The bottom of the positioning groove is in contact with a part of the reinforcing body. The opposite side walls of the positioning groove gradually approach and connect from the top to the bottom to form an upper V-shaped connecting part; the adjacent side walls of two adjacent positioning grooves gradually move away from the top to the bottom, and the tops of the adjacent side walls are connected to form a lower V-shaped connecting part. When loading nuclear fuel pellets, the opposite side walls of the positioning groove support the edge of the nuclear fuel pellet, so that a spacing is formed between the nuclear fuel pellet and the upper V-shaped connecting part.
[0006] The reinforcing body has a protruding part protruding towards the positioning groove. The protruding part is alternately provided with an upper protruding part and a lower protruding part extending in the X-axis direction along the Y-axis direction. The upper protruding part is in contact with the lower V-shaped connecting part, and the upper protruding part is provided with an air flow position along the X-axis.
[0007] Wherein, the opposite outer sides of the load-bearing tray body have reinforcing parts, and the reinforcing parts and the tops of the lower V-shaped connecting parts are on the same plane; the reinforcing body has a fixing part arranged around the protruding part, and the fixing part is connected to the load-bearing tray body; the reinforcing parts and the fixing parts are respectively provided with positioning parts. When the load-bearing tray bodies are stacked, the positioning part at the lower load-bearing tray body is inserted into the positioning part at the upper reinforcing body.
[0008] An information recognition area is provided on the side of the strengthening part.
[0009] On the basis of the above technical solution, the present utility model can also be improved as follows.
[0010] Further, a stop block is formed at one end of each positioning groove. The outer side wall of the stop block is in the same plane as the outer side wall of the bearing disk body. The inner side wall of the stop block gradually inclines from top to bottom, and the height of the stop block is lower than the height of the positioning groove.
[0011] Further, the fixing part includes a group of vertical edges provided on opposite sides of the protruding part and perpendicular to the protruding part, and a horizontal connecting edge connected to the group of vertical edges and in contact with the surface of the lower bearing disk body; welding edges are respectively formed on the horizontal connecting edge on one side of the group of vertical edges, and the height of the vertical edge is greater than the height of the lower protruding part.
[0012] Further, the positioning part is provided on the horizontal connecting edge between the vertical edge and the welding edge, and the positioning part is a hollow conical convex block.
[0013] Further, the information recognition area includes a groove provided on the side wall of the strengthening part, and a two-dimensional code is provided in the groove.
[0014] Further, the fixing part further includes a geometric positioning structure for preventing the nuclear fuel pellets loaded on the lower bearing disk body from exiting the positioning groove. The geometric positioning structure is provided with a group of inclined stop edges respectively adjacent to the group of vertical edges and connected to the protruding part and the horizontal connecting edge. The inclined stop edges gradually incline outward along the horizontal connecting edge from the protruding part; handle edges are respectively formed on the horizontal connecting edge on one side of the group of inclined stop edges. The handle edges are formed with a hand-held groove and a mechanical lifting groove recessed towards the inclined stop edge, and the side wall of the bearing disk body is provided with notches matching the hand-held groove and the mechanical lifting groove; the height of the inclined stop edge is greater than the height of the lower protruding part and is equal to the height of the vertical edge.
[0015] Further, a plurality of through grooves are provided in the air flow distribution position.
[0016] Further, the surface of the bearing disk body is mirror-like.
[0017] Further, the bearing disk body is made of stainless steel, and the bearing disk body is integrally formed by stamping. The strengthening body is made of stainless steel, and the strengthening body is integrally formed by stamping.
[0018] In summary, the present utility model also provides a manufacturing process for a special material tray for nuclear fuel pellets, and the manufacturing steps are as follows:
[0019] S1. Blanking: Use laser cutting to cut the stainless steel sheet into sheets suitable for stamping;
[0020] S2. Pretreatment: Clean the surface of the sheet blanked in S1 to remove impurities such as oil stains and dust. After cleaning, apply a lubricant to the surface of the sheet.
[0021] S3. Forming of the loading and unloading plate: Using a special stamping die, the sheet material processed in S2 is pressed into the inner cavity of the die by a press to form the required disc-shaped structure. The loading and unloading plate can be formed through multiple deep drawing operations to obtain the carrier plate body and the reinforcing body.
[0022] S4. Laser welding: Place the carrier plate body and the reinforcing body obtained in S3 in a special welding fixture, and use an automatic laser welding machine to weld the carrier plate body and the reinforcing body to obtain the special tray for nuclear fuel pellets as described above.
[0023] S5. Trimming / deburring: Remove the excess material at the edge of the special tray for nuclear fuel pellets obtained in S4 through a trimming die to ensure a smooth edge, and perform deburring treatment on the tray to improve the product feel and safety.
[0024] S6. Shaping: Perform final detail adjustment on the basically formed special tray for nuclear fuel pellets to ensure accurate dimensions and a shape that meets the design requirements.
[0025] S7. Polishing: Perform polishing treatment on the special tray for nuclear fuel pellets to make the surface of the special tray for nuclear fuel pellets mirror-like, ensuring that the special tray for nuclear fuel pellets will not cause scratches when the nuclear fuel pellets enter and exit.
[0026] S8. Cleaning and inspection: Clean the polished special tray for nuclear fuel pellets to remove the oil stains and impurities that may be generated during the stamping process, and conduct quality inspection to check whether there are cracks, deformations, and dimensional deviations in the special tray for nuclear fuel pellets.
[0027] S9. QR code engraving: Use a laser marking machine to engrave QR codes on both sides of the special tray for nuclear fuel pellets.
[0028] The beneficial effects of adopting the above solution are as follows:
[0029] 1. A reinforcing body is provided on the carrier plate body, and by staggeredly arranging the upper protrusions and the lower protrusions on the reinforcing body, the strength of the reinforcing body is increased, and the directions of the upper protrusions and the lower protrusions are perpendicular to the direction of the positioning groove. When the carrier plate body bears nuclear fuel pellets, it can effectively prevent the tray from bending and deforming during the loading process.
[0030] 2. By providing positioning parts on the carrier plate body and the reinforcing body, when the carrier plate bodies are stacked, the positioning parts at the lower carrier plate body are inserted into the positioning parts at the upper reinforcing body, which can realize the stacking of multiple trays, facilitating the storage and turnover of the trays. At the same time, it can prevent the stacked trays from falling off during handling, playing a role of mutual positioning. In addition, the upper protrusions and the lower protrusions are staggeredly arranged on the reinforcing body to enhance the overall bearing capacity of the tray and prevent the problem of tray deformation.
[0031] 3. By gradually approaching and connecting the two opposite side walls of the positioning groove from the top to the bottom to form an upper V-shaped connecting portion, a spacing is formed between the nuclear fuel pellet and the upper V-shaped connecting portion, and an air flow position is arranged along the X-axis on the upper protrusion to ensure the air flow during subsequent baking or storage.
[0032] 4. By setting a reinforcing body with a protruding portion, a hollow area is formed in the middle of the reinforcing body to reduce the weight of the tray. At the same time, it can prevent the upper tray from squeezing the nuclear fuel pellets in the lower layer. A fixing portion connected to the protruding portion is provided to facilitate the welding of the reinforcing body to the bearing tray body. At the same time, the fixing portion can play a geometric limiting role to prevent the nuclear fuel pellets in the lower layer from falling from the port of the positioning groove when the tray is carried or moved, playing a blocking role.
[0033] 5. By setting an information recognition area to record the information of each tray, it is convenient for subsequent searching and storage.
[0034] 6. The utility model has the advantages of simple structure, stackability, high hardness, light weight, corrosion resistance, high temperature resistance, long service life of the product, small deformation coefficient, and is convenient for handling and storage. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 is a schematic diagram of the overall structure of the utility model;
[0036] Figure 2 is a schematic diagram of the structure of the bearing tray body in the utility model;
[0037] Figure 3 is a schematic diagram of the structure of the reinforcing body in the utility model;
[0038] Figure 4 is a relationship diagram of two trays stacked in the utility model;
[0039] Figure 5 is Figure 4 the top view shown;
[0040] Figure 6 is Figure 5 the cross-sectional view at A-A in
[0041] Figure 7 is Figure 5 the cross-sectional view at B-B in DETAILED DESCRIPTION OF THE EMBODIMENTS
[0042] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.
[0043] In the nuclear fuel assembly industry, after the fuel pellets are produced, they need to be stored and transferred through trays. Currently, the commonly used trays are of single-layer corrugated plate structure. When storing the pellets, due to the poor rigidity of the trays, deformation occurs during use, and the single-layer corrugated plate structure cannot be stacked, requiring special storage cabinets, resulting in the inability to automate the storage and transfer of the pellets. To solve the above problems, a special tray for nuclear fuel pellets and its manufacturing process are proposed.
[0044] The present utility model provides the following preferred embodiments
[0045] As Figure 1 and Figure 4 shown, a special tray for nuclear fuel pellets 40 includes a bearing tray body 10 made of stainless steel material and a reinforcing body 20 made of stainless steel material. The shapes of the bearing tray body 10 and the reinforcing body 20 are integrally formed by stamping, and the reinforcing body 20 is welded to the bottom of the bearing tray body 10. Multiple bearing tray bodies 10 can be stacked, and the bearing capacity of the bearing tray body 10 is enhanced by the reinforcing body 20 to prevent deformation. It should be noted that the bearing tray body 10 and the reinforcing body 20 can also be made of other metal materials. In other embodiments, the bearing tray body 10 and the reinforcing body 20 can also be made of non-metallic materials.
[0046] As Figure 2 shown, the bearing tray body 10 is mainly used to hold the nuclear fuel pellets 40. The bearing tray body 10 is provided with a plurality of positioning grooves 101 extending in the Y-axis direction at intervals along the X-axis direction, and the bottom of the positioning grooves 101 is in contact with a part of the reinforcing body 20. Both ends of each positioning groove 101 are through, and a stop block 102 is formed at one end of the positioning groove 101. After the nuclear fuel pellet 40 is pushed into the positioning groove 101 from the other end, the nuclear fuel pellet 40 is gradually pushed towards the stop block 102 end, and the stop block 102 blocks to prevent the frontmost nuclear fuel pellet 40 from being pushed out of the positioning groove 101; the outer side wall of the stop block 102 is in the same plane as the outer side wall of the bearing tray body 10, the inner side wall of the stop block 102 is gradually inclined from top to bottom, and the height of the stop block 102 is lower than the height of the positioning groove 101. The inner side wall of the stop block 102 is set to be inclined so that there is a certain gap between the end face of the stop block 102 and the end face of the frontmost nuclear fuel pellet 40, facilitating the pushing of the nuclear fuel pellet 40 through the gap between the two during subsequent material taking, and setting the height of the stop block 102 lower than the height of the positioning groove 101 so that when stacking, there is a space for gas flow in the positioning groove 101 at the end of the lower layer where the stop block 102 is located.
[0047] Further, in order to improve the air flow mobility between the positioning groove 101 and the nuclear fuel pellet 40, for this purpose, the opposite side walls 1011 of the positioning groove 101 gradually approach and connect from the top to the bottom to form an upper V-shaped connecting portion 1012, and the adjacent side walls 1011 of two adjacent positioning grooves 101 gradually move away from each other from the top to the bottom, and the tops of the adjacent side walls 1011 are connected to form a lower V-shaped connecting portion 1013. When loading the nuclear fuel pellet 40, the opposite side walls 1011 of the positioning groove 101 support the edge of the nuclear fuel pellet 40. Since the two side walls 1011 gradually approach and connect from the top to the bottom, a spacing is formed between the bottom of the nuclear fuel pellet 40 and the upper V-shaped connecting portion 1012. Through this setting, a ventilated and breathable spacing is formed between the positioning groove 101 and the nuclear fuel pellet 40, so as to facilitate the air flow during subsequent baking or storage.
[0048] In this embodiment, since the opposite side walls 1011 of the positioning groove 101 gradually approach from the top to the bottom, and in order to prevent the nuclear fuel pellet 40 from being overly clamped in the positioning groove 101, the contact positions of the nuclear fuel pellet 40 contact surface with the two side walls 1011 are smaller than the maximum outer diameter of the nuclear fuel pellet 40. Since the nuclear fuel pellet 40 is a cylindrical block, therefore, the contact between the nuclear fuel pellet 40 and the two side walls 1011 is an arc surface contact. When there is no external force to squeeze the two side walls 1011 into the positioning groove 101, the two side walls 1011 can well clamp the nuclear fuel pellet 40 and at the same time can well push the nuclear fuel pellet 40 to move in the positioning groove 101; furthermore, in other embodiments, the contact positions of the nuclear fuel pellet 40 contact surface with the two side walls 1011 are the maximum outer diameter of the nuclear fuel pellet 40.
[0049] Such as Figures 3 to 7As shown, the reinforcing body 20 is mainly used to reinforce the load-bearing strength of the carrier plate body 10 and prevent the carrier plate body 10 from bending or deforming. The reinforcing body 20 has a protruding portion 201 protruding towards the positioning groove 101. By providing a reinforcing body 20 with a protruding portion 201, a hollow area is formed in the middle of the reinforcing body 20, reducing the weight of the tray and avoiding the upper tray from squeezing the nuclear fuel pellets 40 in the lower layer. The protruding portion 201 is staggered in the Y-axis direction with an upper protruding portion 202 and a lower protruding portion 203 extending in the X-axis direction. The cross-section of the upper protruding portion 202 is in an inverted U shape, and the cross-section of the lower protruding portion 203 is in a U shape. The upper protruding portion 202 contacts the lower V-shaped connecting portion 1013. By staggeredly arranging the upper protruding portion 202 and the lower protruding portion 203 on the reinforcing body 20, the strength of the reinforcing body 20 is increased, and the directions of the upper protruding portion 202 and the lower protruding portion 203 are perpendicular to the direction of the positioning groove 101, which can effectively prevent the tray from bending and deforming during the loading process when the carrier plate body 10 bears the nuclear fuel pellets 40. The upper protruding portion 202 is provided with an air flow position composed of a plurality of through grooves 2021 along the X-axis, and the through grooves 2021 are located below the upper V-shaped connecting portion 1012, and the width of the through grooves 2021 is greater than or less than the width of the upper V-shaped connecting portion 1012 to facilitate the air flow during subsequent baking or storage.
[0050] Further, in order to enable the trays to be stacked on each other for easy storage or handling, for this purpose, the opposite outer sides of the carrier plate body 10 have reinforcing portions 103, and the reinforcing portions 103 are on the same plane as the top of the lower V-shaped connecting portion 1013; the reinforcing body 20 has a fixing portion 204 provided around the protruding portion 201, and the fixing portion 204 is connected to the carrier plate body 10; the reinforcing portion 103 and the fixing portion 204 are respectively provided with positioning portions 30. When the carrier plate bodies 10 are stacked, the positioning portion 30 at the lower layer of the carrier plate body 10 is inserted into the positioning portion 30 at the upper layer of the reinforcing body 20. By providing the positioning portions 30 on the carrier plate body 10 and the reinforcing body 20, when the carrier plate bodies 10 are stacked, the positioning portion 30 at the lower layer of the carrier plate body 10 is inserted into the positioning portion 30 at the upper layer of the reinforcing body 20, and multiple trays can be stacked on each other for easy storage and turnover of the trays.
[0051] Specifically, the positioning portion 30 is a hollow conical protrusion. Among them, the hollow diameter of the positioning portion 30 on the reinforcing portion 103 is slightly smaller than the hollow diameter of the positioning portion 30 on the fixing portion 204, so that the positioning portion 30 on the lower layer of the carrier plate body 10 can be inserted into the positioning portion 30 on the upper layer of the reinforcing body 20, and thus it can be avoided that when handling, the stacked trays do not move relative to each other and the problem of dropping is avoided.
[0052] As Figure 7As shown in the figure, the fixed part 204 includes a group of vertical edges 2041 disposed on opposite sides of the protruding part 201 and perpendicular to the protruding part 201, and a horizontal connecting edge 2042 connected to the group of vertical edges 2041 and in contact with the surface of the lower carrier disk body 10; welding edges 2043 are respectively formed on the horizontal connecting edge 2042 on one side of the group of vertical edges 2041, and the positioning part 30 is disposed on the horizontal connecting edge 2042 between the vertical edge 2041 and the welding edge 2043. The height of the vertical edge 2041 is greater than the height of the lower protruding part 203. The welding edge 2043 is in contact with the inner side edge of the carrier disk body 10, and the reinforcing part 103 and the carrier disk body 10 are fixed by welding. The horizontal connecting edge 2042 is provided so that when the trays are stacked, the horizontal connecting edge 2042 can be in smooth contact with the lower carrier disk body 10;
[0053] The fixed part 204 further includes a geometric positioning structure for preventing the nuclear fuel pellets 40 loaded in the lower carrier disk body 10 from exiting the positioning groove 101. The geometric positioning structure is provided with a group of inclined blocking edges 2044 adjacent to the group of vertical edges 2041 and connected to the protruding part 201 and the horizontal connecting edge 2042. The inclined blocking edges 2044 gradually incline outward along the horizontal connecting edge 2042 from the protruding part 201; handle portions 2045 are respectively formed on the horizontal connecting edge 2042 on one side of the group of inclined blocking edges 2044. The handle portions 2045 are formed with a hand-held groove and a mechanical lifting groove 2046 recessed toward the inclined blocking edges 2044, and the side wall 1011 of the carrier disk body 10 is provided with a notch that coincides with the hand-held groove and the mechanical lifting groove 2046, so as to facilitate manual or robotic handling by providing the hand-held groove and the mechanical lifting groove 2046; the height of the inclined blocking edge 2044 is greater than the height of the lower protruding part 203, and welding edges 2043 lower than the handle portions 2045 are formed on both sides of the handle portions 2045, and welding is achieved with the carrier disk body 10 through the welding edges 2043; the height of the inclined blocking edge 2044 is greater than the height of the lower protruding part 203 and is equal to the height of the vertical edge 2041. The inclined blocking edges 2044 are provided to prevent the entire end face of the nuclear fuel pellet 40 from contacting the inclined blocking edges 2044 and avoid scratching the nuclear fuel pellet 40. Through the above settings, the fixed part 204 can play a role in geometric limiting, preventing the nuclear fuel pellets 40 in the lower layer from falling from the port of the positioning groove 101 when handling or moving the trays, and playing a blocking role.
[0054] In order to be able to record the information of each tray for subsequent retrieval, information identification areas 1031 are provided on the side edges of the two reinforcing parts 103. The information identification areas 1031 include grooves provided on the side walls of the reinforcing parts 103, and two-dimensional codes are provided in the grooves. Corresponding data, such as the model, specification, weight of the tray, and the number of nuclear fuel pellets 40 stored, can be read or entered by scanning the two-dimensional code.
[0055] Preferably, in order to avoid scratching the nuclear fuel pellets 40 contained in the tray, the surface of the carrier tray body 10 is polished, that is, the surfaces of both side walls 1011, the upper V-shaped connecting portion 1012 and the lower V-shaped connecting portion 1013 are polished to make its surface mirror-like, preventing the problem that the low smoothness of the surface of the carrier tray body 10 causes scratching of the nuclear fuel pellets 40 when the nuclear fuel pellets 40 move.
[0056] In summary, the present application also provides a manufacturing process for a special tray for nuclear fuel pellets 40, and its manufacturing steps are as follows:
[0057] S1. Blanking: Use laser cutting to cut the stainless steel sheet into sheets suitable for stamping; in addition, before blanking, the surface of the stainless steel sheet needs to be cleaned to remove dust or large particles on the surface of the stainless steel sheet to avoid scratching the stainless steel sheet during cutting and handling.
[0058] S2. Pretreatment: Clean the surface of the sheet blanked in S1 to remove impurities such as oil stains and dust to ensure the stamping quality. After cleaning, apply a lubricant to the sheet surface to reduce friction during stamping and improve the die life.
[0059] S3. Forming of the upper and lower blanking plates: Use a special stamping die to press the sheet processed in S2 into the inner cavity of the die through a press to form the required disc-shaped structure. The upper and lower blanking plates can be formed by multiple deep drawing operations to obtain the carrier tray body 10 and the reinforcing body 20.
[0060] S4. Laser welding: Place the carrier tray body 10 and the reinforcing body 20 obtained in S3 in a special welding fixture, and use an automatic laser welding machine to weld the carrier tray body 10 and the reinforcing body 20 to obtain the above-mentioned special tray for nuclear fuel pellets 40.
[0061] S5. Trimming / deburring: Remove the excess material at the edge of the special tray for nuclear fuel pellets 40 obtained in S4 through a trimming die to ensure that the edge is smooth, and perform deburring treatment on the tray to improve the product feel and safety.
[0062] S6. Shaping: Perform final detail adjustment on the basically formed special tray for nuclear fuel pellets 40 to ensure accurate dimensions and the shape meets the design requirements.
[0063] S7. Polishing: Perform polishing treatment on the special tray for nuclear fuel pellets 40 to make the surface of the special tray for nuclear fuel pellets 40 mirror-like, ensuring that the special tray for nuclear fuel pellets 40 does not cause scratching when the nuclear fuel pellets 40 enter and exit.
[0064] S8. Cleaning and inspection: Clean the polished special tray for nuclear fuel pellets 40 to remove oil stains and impurities that may be generated during stamping, and perform quality inspection to check whether there are defects such as cracks, deformation, and dimensional deviation in the special tray for nuclear fuel pellets 40.
[0065] S9, QR code engraving: Use a laser marking machine to engrave the QR code on both sides of the special tray for nuclear fuel pellets 40.
[0066] In summary, the utility model has a simple structure, a concise manufacturing process, can be stacked, has high hardness, light weight, corrosion resistance, and high temperature resistance. The product has a long service life and a small deformation coefficient, and is convenient for handling and storage.
[0067] The above are only the preferred embodiments of the utility model, and are not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the utility model.
Claims
1. A special tray for nuclear fuel pellets, characterized in that: It includes a stackable carrier plate and a reinforcing body arranged at the bottom of the carrier plate to prevent the carrier plate from deforming; The carrier plate body is provided with a plurality of positioning grooves extending along the Y-axis direction and arranged at intervals along the X-axis direction. The bottom of the positioning groove contacts a part of the reinforcing body. The two opposite side walls of the positioning groove gradually approach and connect from the top to the bottom to form an upper V-shaped connection portion. The adjacent two side walls of two adjacent positioning grooves gradually move away from the top to the bottom, and the tops of the adjacent two side walls are connected to form a lower V-shaped connection portion. When loading nuclear fuel pellets, the two opposite side walls of the positioning groove support the edge of the nuclear fuel pellets, so that a distance is formed between the nuclear fuel pellets and the upper V-shaped connection portion. The reinforcement body has a protrusion protruding toward the positioning groove, and the protrusion is staggered along the Y-axis direction with an upper protrusion and a lower protrusion extending along the X-axis direction, the upper protrusion is in contact with the lower V-shaped connecting portion, and the upper protrusion is arranged with an airflow position along the X-axis; The bearing plate body has reinforcement parts on both sides thereof, and the reinforcement parts are in the same plane as the top of the lower V-shaped connecting part; the reinforcement body has a fixing part arranged around the protruding part, and the fixing part is connected to the bearing plate body; the reinforcement part and the fixing part are respectively provided with positioning parts, and when the bearing plates are stacked, the positioning parts at the bearing plate body of the lower layer are inserted into the positioning parts at the reinforcement body of the upper layer; An information identification area is provided on the side of the reinforcement portion.
2. The nuclear fuel pellet tray according to claim 1, characterized in that: A stopper is formed at one end of each positioning groove, the outer wall of the stopper is in the same plane as the outer wall of the bearing plate, the inner wall of the stopper is gradually inclined from the top to the bottom, and the height of the stopper is lower than the height of the positioning groove.
3. The nuclear fuel pellet tray according to claim 1, characterized in that: The fixed part includes a group of vertical edges arranged on opposite sides of the protruding part and perpendicular to the protruding part, and horizontal connecting edges connected to the group of vertical edges and in contact with the surface of the lower supporting plate; the horizontal connecting edges on one side of the group of vertical edges are respectively formed with welding edges, and the height of the vertical edges is greater than the height of the lower protrusion.
4. The nuclear fuel pellet tray according to claim 3, characterized in that: The positioning part is arranged on the horizontal connecting edge between the vertical edge and the welding edge, and the positioning part is a hollow conical convex block.
5. The nuclear fuel pellet tray according to claim 1, characterized in that: The information identification area comprises a groove arranged on the side wall of the reinforcement part, and a two-dimensional code is arranged in the groove.
6. The nuclear fuel pellet tray according to claim 3, characterized in that: The fixed part also includes a geometric positioning structure for preventing the nuclear fuel core blocks carried by the lower supporting plate from exiting the positioning groove. The geometric positioning structure is provided with a group of inclined ribs respectively adjacent to a group of vertical edges and connected to the protruding portion and the horizontal connecting edge. The inclined ribs are gradually inclined outward from the protruding portion along the horizontal connecting edge; the horizontal connecting edges on one side of a group of inclined ribs are respectively formed with handle edges, and the handle edges are formed with a hand-carrying groove and a mechanical lifting groove that are recessed toward the inclined ribs, and the side walls of the supporting plate are provided with notches that coincide with the hand-carrying groove and the mechanical lifting groove; the height of the inclined ribs is greater than the height of the lower protrusion and is the same height as the vertical edge.
7. The nuclear fuel pellet tray according to claim 1, characterized in that: A plurality of through slots are arranged at the air flow position.
8. The nuclear fuel pellet tray according to claim 1, characterized in that: The surface of the supporting plate is mirror-like.
9. The nuclear fuel pellet tray according to claim 1, characterized in that: The bearing plate body is made of stainless steel and is integrally stamped and formed; the reinforcement body is made of stainless steel and is integrally stamped and formed.