Tray for graphite component inspection
By designing a tray for testing graphite components, the problem of easy impact and low efficiency in the transportation and testing of nuclear graphite components was solved, achieving safe transportation and efficient testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAQING NUCLEAR TECH (SUZHOU) CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-06-26
AI Technical Summary
The transportation and testing of nuclear graphite components are characterized by large quantity, heavy weight, susceptibility to impacts, and low efficiency. Existing technologies are insufficient to effectively protect the components and improve transportation and testing efficiency.
Design a pallet for testing graphite components, including a pallet body and a buffer layer. The pallet body is made of multi-layer solid wood boards, and the buffer layer is made of sponge material. A lifting groove is used for lifting straps to fix the pallet. The pallet is matched with the graphite component and enters the testing device to avoid direct contact and ensure stable transportation.
It enables safe transport and efficient testing of graphite components, avoids collisions, improves transport and testing efficiency, and ensures the accuracy of test results.
Smart Images
Figure CN224409962U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of graphite component testing technology, and in particular to a tray for testing graphite components. Background Technology
[0002] Nuclear graphite is a graphite material used in the nuclear industry. It is mainly used as a neutron moderator and reflector in nuclear reactors, as well as in spherical and block components of high-temperature gas-cooled reactors. It has the characteristics of high purity, high density, and isotropy to ensure stability under neutron radiation.
[0003] In the production and processing of nuclear graphite, it is necessary to inspect the finished product or the blank before finishing (referred to as graphite components) to detect potential defects such as voids, porosity, and cracks. To improve inspection efficiency, the existing inspection method uses a detection device consisting of a horizontal spiral CT scanner and a detector that rotates along a horizontal axis. The graphite components are conveyed sequentially through the detection channel in the middle of the detection device via a roller conveyor mechanism. Before inspection begins, the component to be inspected is placed on the conveyor roller conveyor at the entrance of the inspection chamber to complete the loading process; after inspection, the component is removed from the conveyor roller conveyor at the exit of the inspection chamber to complete the unloading process.
[0004] Due to the large number of components (each stack of graphite components contains over 10,000 pieces), their significant weight and size (components typically weigh 100-400 kg and are 600-2000 mm in length), and the need for transfer between the testing workshop and upstream / downstream workshops, as well as the need to prevent damage from friction and collisions between the graphite components and roller conveyors or other equipment structures, a support structure needs to be designed to protect the graphite components from bumps and scratches during transfer and testing, while also accelerating the efficiency of transfer and testing, so as to complete the testing of all graphite components in a short time. Utility Model Content
[0005] To address the problems existing in the prior art—namely, the large number and weight of graphite components to be tested, their susceptibility to impacts during transport and testing, and the low efficiency—this invention aims to provide a tray for testing graphite components. By designing a dedicated tray for graphite components, the components are placed on the tray, and the tray and graphite components can be transported and loaded / unloaded via hoisting. Furthermore, the tray can enter the testing device simultaneously with the graphite components, avoiding direct contact between the graphite components and roller conveyors or other equipment structures throughout the process. This effectively protects the components while improving transport and testing efficiency.
[0006] To achieve the above objectives, the technical solution of this utility model is as follows:
[0007] A graphite component testing tray for supporting graphite components includes a tray body and a buffer layer. The buffer layer is in the shape of an isosceles trapezoid and is fixed to the upper surface of the tray body. The graphite component is placed on the buffer layer, with the larger end of the graphite component located at the bottom edge of the buffer layer. The tray body is provided with two sets of lifting slots symmetrically arranged about the centerline of the tray length direction. The lifting slots are notches opened at the edges of the tray body and are used to accommodate and limit lifting straps.
[0008] The present invention is further configured such that the total height of the pallet body and the buffer layer does not exceed 40mm, and the pallet body and the graphite component enter the detection device simultaneously through the roller conveyor mechanism.
[0009] The present invention is further configured such that: the center distance between the two lifting slots on the same side of the pallet body is L1, then L1=N*d; where d is the distance between two adjacent rollers on the roller conveyor mechanism, and N is an integer.
[0010] The present invention is further configured such that: the distance between the lifting groove near the bottom edge of the buffer layer and the end of the bottom edge of the buffer layer on the pallet body is L2, then L2=N*d; where d is the distance between two adjacent rollers on the roller conveyor mechanism, and N is an integer.
[0011] The present invention is further configured such that: the tray body is made of multi-layer solid wood board material, and the cushioning layer is made of sponge material.
[0012] The present invention is further configured such that the thickness of the buffer layer is 10mm.
[0013] The present invention is further configured to include indicator lines, wherein multiple indicator lines are located at one end of the bottom edge of the buffer layer on the tray body, and all indicator lines are arranged parallel to each other. The indicator lines are used to align with the larger end of the graphite components of different specifications.
[0014] The present invention is further configured such that both ends of the tray body in the length direction are provided with raised edges.
[0015] The present invention is further configured such that chamfers are provided at the four corners of the pallet body and in the lifting groove.
[0016] The present invention is further configured such that the width of the pallet body is adapted to the length of the roller conveyor on the roller conveyor mechanism.
[0017] In summary, the beneficial effects achieved by this utility model are as follows:
[0018] (1) The lifting slot on the pallet body allows two lifting straps to pass through. After the graphite component is placed on the pallet body, the graphite component can be transferred and loaded / unloaded by lifting, which improves the efficiency of transfer and loading / unloading.
[0019] (2) The height of the pallet body and the buffer layer is low, and both the pallet body and the buffer layer are made of materials that do not affect the test results. Therefore, they can enter the test device together with the graphite components. Thus, from the time the graphite components are loaded to the time they are unloaded after the test, the graphite components are always protected by the pallet body and the buffer layer. Moreover, the width of the pallet body is matched with the length of the roller conveyor on the roller conveyor mechanism, which makes the pallet body more stable on the roller conveyor mechanism.
[0020] (3) The center distance between the two lifting slots on the same side of the pallet body and the distance between the lifting slot near the bottom edge of the buffer layer and the end of the bottom edge of the buffer layer on the pallet body are integer multiples of the distance between two adjacent rollers on the roller conveyor mechanism, so that when the pallet body is lifted, the lifting slot falls exactly in the gap of the roller, which is convenient for threading and unloading the lifting straps.
[0021] (4) When placing graphite components on the pallet body, by aligning the multiple indicator lines at one end of the bottom edge of the buffer layer on the pallet body with the larger end of the graphite components of different specifications, it can be ensured that the center of gravity of the graphite components is located at the same position on the pallet body and in the middle of the two sets of lifting slots when the pallet body of the same specification supports graphite components of different specifications. This ensures that the pallet can maintain a stable posture during lifting and prevents the graphite components from slipping. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0023] Figure 1 This is a schematic diagram of the structure of the tray for testing graphite components in Embodiment 1 of this utility model;
[0024] Figure 2 This is a front view of the tray for testing graphite components in Embodiment 1 of this utility model;
[0025] Figure 3 This is a top view of the tray for testing graphite components in Embodiment 1 of this utility model;
[0026] Figure 4 This is a top view of the tray for testing graphite components in Embodiment 2 of this utility model;
[0027] Figure 5 This is a top view of the tray for testing graphite components in Embodiment 3 of this utility model;
[0028] Figure 6 This is a top view of the tray for testing graphite components in Embodiment 4 of this utility model.
[0029] In the diagram: 1. Pallet body; 11. Curved edge; 12. Lifting groove; 2. Buffer layer; 3. Indicator line. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. For ease of explanation, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0031] It should be noted that the embodiments and features involved in the embodiments of this utility model can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0032] Example 1
[0033] As attached Figure 1-3 As shown, a tray for testing graphite components includes a tray body 1 and a buffer layer 2, which is used to support graphite components.
[0034] In existing technology, graphite components need to be conveyed into a testing device via a roller conveyor mechanism for flaw detection. The roller conveyor mechanism uses several parallel rollers to feed the graphite components into the testing device, which is a horizontal spiral CT scanner and a detector. The detailed structure of the roller conveyor mechanism and the testing device will not be described here.
[0035] The pallet body 1 is a rectangular thin plate structure with curved edges 11 at both ends along its length. The curved edges 11 make the two ends of the pallet body 1 have a smooth arc transition, and the pallet body 1 has a boat-shaped arc along its length, which helps to reduce the up-and-down movement of the pallet during transportation and increase the stability of the transportation process.
[0036] The pallet body 1 is made of multi-layer solid wood boards, with chamfered corners at all four corners and a clear varnish finish to prevent moisture damage and deformation. The multi-layer solid wood boards have a density of approximately 0.4-0.6 g / cm³, a low density, and are primarily composed of C, H, O, and N elements, resulting in low radiation absorption. These boards possess excellent mechanical properties, capable of withstanding loads exceeding 500 kg without failure or deformation. The smooth, soft surface of the multi-layer solid wood boards is free of hard burrs or protrusions, ensuring no damage to the graphite components.
[0037] The pallet body 1 is provided with two sets of lifting slots 12 symmetrically arranged about the centerline of the pallet's length direction. The lifting slots 12 are rectangular notches opened on the side of the pallet body 1, and are used to accommodate and limit the lifting straps. In this embodiment, the lifting slots 12 are 7cm*5cm in size, and the lifting slots 12 are provided with a chamfer with a radius of 10mm, so as to facilitate the passage of 2-ton flat lifting straps.
[0038] The buffer layer 2 is an isosceles trapezoid and fixed to the upper surface of the pallet body 1. The buffer layer 2 is made of a flexible material, preferably high-density sponge, and can be fixed to the pallet body 1 by adhesive. Since the graphite component has a larger volume at one end and a smaller volume at the other, the shape of the isosceles trapezoidal buffer layer 2 can be adapted to the graphite component. When the graphite component is placed on the buffer layer 2, the larger end of the graphite component is located at the bottom edge of the buffer layer 2, and the buffer layer 2 serves to prevent the graphite component from sliding and to cushion vibrations and bumps during transportation.
[0039] The thickness of the buffer layer 2 is 10mm, and the total height of the tray body 1 and the buffer layer 2 does not exceed 40mm. This allows the tray body 1 and the buffer layer 2 to enter the detection device simultaneously with the graphite component via the roller conveyor mechanism without the height of the graphite component exceeding the effective radiation range. Thus, from the time the graphite component is loaded until it is unloaded after detection, the graphite component is always protected by the tray body 1 and the buffer layer 2.
[0040] Furthermore, the width of the pallet body 1 is matched with the length of the roller conveyor, making the conveying of the pallet body 1 on the roller conveyor more stable. In this embodiment, the dimensions of the pallet body 1 are 1000mm*675mm*15mm (length*width*thickness). Since the width of the conveyor roller is 680mm, the width of the pallet body 1 is 675mm, which ensures both smooth conveying and prevents significant deviation.
[0041] As attached Figure 3As shown, the center-to-center distance between the two lifting slots 12 on the same side of the pallet body 1 is L1, then L1 = N * d; where d is the distance between two adjacent rollers on the roller conveyor mechanism, and N is an integer. That is, the center-to-center distance between the two lifting slots 12 is an integer multiple of the distance between two adjacent rollers on the roller conveyor mechanism, so that when lifting the pallet body 1, the lifting slot 12 falls exactly in the gap of the roller, which is convenient for threading and unloading the lifting straps.
[0042] Meanwhile, the distance between the lifting groove 12 near the bottom edge of the buffer layer 2 and the end of the bottom edge of the buffer layer 2 on the pallet body 1 is L2, then L2=N*d; where d is the distance between two adjacent rollers on the roller conveyor mechanism, and N is an integer. That is, the distance between the lifting groove 12 near the bottom edge of the buffer layer 2 and the end of the bottom edge of the buffer layer 2 on the pallet body 1 is also an integer multiple of the distance between two adjacent rollers on the roller conveyor mechanism, ensuring that when the graphite component is inspected and the pallet body 1 stops at the exit, the lifting groove 12 near the bottom edge of the buffer layer 2 is just in the gap between the rollers, which is convenient for threading the lifting strap.
[0043] The implementation process of the above embodiments is as follows:
[0044] In the pre-inspection process, the pallet body 1 is placed on two wooden supports, with the side of the pallet body 1 containing the buffer layer 2 facing upwards. A gap of at least 10cm is left between the bottom of the pallet body 1 and the ground to allow forklift access. The graphite component is placed at the buffer layer 2 position on the pallet body 1. The pallet body 1 with the graphite component is then transported by forklift to the entrance of the inspection device and placed on the wooden supports on the ground. Next, two 2-ton nylon slings are threaded into two sets of lifting slots 12. A crane lifts the pallet body 1 and the graphite component and places them on the conveyor rollers, with the larger end of the graphite component facing forward. The lifting slots 12 and the gaps between the slings and the rollers are aligned to facilitate the removal of the slings. The roller conveyor then sends the pallet body 1 and the graphite component into the inspection device for testing the graphite component. After inspection and conveying to the unloading position, the lifting slot 12 on the pallet body 1 is aligned with the gap of the roller conveyor. At this time, two 2-ton nylon soft slings are inserted into the two sets of lifting slots 12 respectively to lift the pallet body 1 and graphite components away from the conveyor roller conveyor and place them on the wooden sleepers on the ground. Then, a forklift can be used to transfer the pallet body 1 and graphite components to the next process.
[0045] Example 2
[0046] As attached Figure 4As shown, this utility model discloses a tray for testing graphite components. Unlike Embodiment 1, the tray body 1 has dimensions of 2300mm*675mm*18mm (length*width*thickness). Since graphite components have different specifications with large length differences, the tray body 1 in this embodiment can be used to test graphite components with a length greater than 1000mm.
[0047] Example 3
[0048] As attached Figure 5 As shown, this utility model discloses a tray for testing graphite components. Unlike embodiment one, it also includes an indicator line 3.
[0049] The indicator lines 3 are three parallel straight lines, each perpendicular to the length of the pallet body 1. All indicator lines 3 are located at the bottom edge of the buffer layer 2 on the pallet body 1. The indicator lines 3 are used to assist workers in placing graphite components onto the pallet body 1. By aligning the larger end of the graphite component with the corresponding indicator line 3, the pallet body 1 can ensure that the center of gravity of the graphite component is located in the same position on the pallet body 1 and between the two sets of lifting slots 12 when supporting graphite components of different sizes. This ensures that the pallet remains stable during lifting and prevents the graphite components from slipping.
[0050] Example 4
[0051] As attached Figure 6 As shown, this utility model discloses a tray for testing graphite components. Unlike embodiment three, the dimensions of the tray body 1 are 2300mm*675mm*18mm (length*width*thickness). Furthermore, since the specifications of the graphite components supported by the tray body 1 have changed in this embodiment, the positions and distances between the three indicator lines 3 have also changed. However, it is always possible to ensure that the center of gravity of the graphite component is located in the middle of the two sets of lifting slots 12 on the tray body 1.
[0052] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and modifications.
Claims
1. A tray for testing graphite components, used to support graphite components, characterized in that, The pallet includes a pallet body (1) and a buffer layer (2). The buffer layer (2) is an isosceles trapezoid and is fixed to the upper surface of the pallet body (1). The graphite component is placed on the buffer layer (2) and the larger end of the graphite component is located at the bottom edge of the buffer layer (2). The pallet body (1) is provided with two sets of lifting slots (12) symmetrically arranged about the center line of the pallet length direction. The lifting slots (12) are notches opened on the side of the pallet body (1) and are used to accommodate and limit the lifting straps.
2. The graphite component testing tray according to claim 1, characterized in that, The total height of the pallet body (1) and the buffer layer (2) does not exceed 40mm. The pallet body (1) and the graphite component enter the detection device simultaneously through the roller conveyor mechanism.
3. The tray for testing graphite components according to claim 2, characterized in that, The center distance between the two lifting slots (12) on the same side of the pallet body (1) is L1, then L1=N*d; where d is the distance between two adjacent rollers on the roller conveyor mechanism, and N is an integer.
4. The tray for testing graphite components according to claim 2 or 3, characterized in that, The distance between the lifting groove (12) near the bottom edge of the buffer layer (2) and the end of the bottom edge of the buffer layer (2) on the pallet body (1) is L2, then L2=N*d; where d is the distance between two adjacent rollers on the roller conveyor mechanism, and N is an integer.
5. The graphite component testing tray according to claim 1, characterized in that, The tray body (1) is made of multi-layer solid wood board material, and the buffer layer (2) is made of sponge material.
6. The tray for testing graphite components according to claim 2 or 5, characterized in that, The thickness of the buffer layer (2) is 10 mm.
7. The tray for testing graphite components according to claim 1, characterized in that, It also includes indicator lines (3), multiple indicator lines (3) are located at one end of the bottom edge of the buffer layer (2) on the tray body (1), and all indicator lines (3) are arranged parallel to each other. The indicator lines (3) are used to align with the larger end of the graphite components of different specifications.
8. The tray for testing graphite components according to claim 1, characterized in that, Both ends of the tray body (1) in the length direction are provided with curved edges (11).
9. The graphite component testing tray according to claim 1, characterized in that, The four corners of the pallet body (1) and the inside of the lifting slot (12) are all chamfered.
10. The tray for testing graphite components according to claim 2, characterized in that, The width of the pallet body (1) is adapted to the length of the roller conveyor on the roller conveyor mechanism.