A high-performance nuclear fuel loading and unloading machine support

Abstract

This utility model relates to the technical field of nuclear fuel loading and unloading machine supports, and discloses a high-performance nuclear fuel loading and unloading machine support, including a conveying pipe. A positioning plate is slidably connected to the outer surface of the conveying pipe, and a positioning sleeve is fixedly connected to the outer surface of the positioning plate. A fixing ring is detachably connected to the inner side wall of the positioning sleeve. A first guide ring is provided on one side of the fixing ring, and four first guide rods are slidably inserted into the outer surface of the first guide ring. A second guide ring is provided on one side of the first guide ring. This high-performance nuclear fuel loading and unloading machine support, through the cooperative arrangement of the first and second guide rings, can assist and guide the sliding of the first and second guide rods, thereby allowing the first and second guide rods to extend a sufficient distance. Therefore, it can form auxiliary support in four directions around the conveying pipe during its extension operation.

Description

Technical Field

[0001] This utility model relates to the field of nuclear fuel loading and unloading machine support technology, specifically a high-performance nuclear fuel loading and unloading machine support. Background Technology

[0002] In the nuclear industry, nuclear fuel loading and unloading machines are crucial equipment in the operation of nuclear reactors. They are mainly used to load, unload, and transport nuclear fuel assemblies, playing a key role in the safe and stable operation of nuclear reactors. As an important component of nuclear fuel loading and unloading machines, the performance of the support structure directly affects the working accuracy and stability of the loading and unloading machine.

[0003] In existing technologies, the support structure of nuclear fuel loading and unloading machines has some shortcomings during use. When the conveying pipe extends to perform loading and unloading operations, the lack of effective guiding and supporting structures makes it difficult to form stable auxiliary support in multiple directions around the conveying pipe. This causes the conveying pipe to bend and sway during operation, which not only affects the working accuracy of the loading and unloading machine, but may also cause safety hazards due to excessive swaying. At the same time, the existing support structure often cannot achieve the overlapping storage of components such as guide rods when the conveying pipe is retracted, resulting in a long overall length of the device and a large space occupation. This is not conducive to the installation, transportation and storage of the equipment, and to a certain extent limits the application scenarios and practicality of the loading and unloading machine. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-performance nuclear fuel loading and unloading machine support that can provide stable support and reduce bending and swaying of the conveying pipe during operation, while effectively reducing the space occupied by the device when stored.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-performance nuclear fuel loading and unloading machine support, comprising a conveying pipe, a positioning plate slidably connected to the outer surface of the conveying pipe, a positioning sleeve fixedly connected to the outer surface of the positioning plate, a fixing ring detachably connected to the inner side wall of the positioning sleeve, a first guide ring provided on one side of the fixing ring, four first guide rods slidably inserted into the outer surface of the first guide ring, a second guide ring provided on one side of the first guide ring, four second guide rods slidably inserted into the outer surface of the second guide ring, and two limiting rings provided on one side of the second guide ring.

[0008] Optionally, the outer surface of the fixing ring is fixedly connected to multiple protective cylinders, and the outer surface of the first guide ring is fixedly connected to the other end of the multiple protective cylinders.

[0009] Optionally, the outer surface of the second guide ring is fixedly connected to the ends of the four first guide rods.

[0010] Optionally, the outer surface of one of the limiting rings is fixedly connected to the outer surfaces of the four second guide rods, and the outer surface of the other limiting ring is fixedly connected to the ends of the four second guide rods.

[0011] Optionally, a pressure rod is threaded through the outer surface of each of the two limiting rings, and one end of the pressure rod that passes through the two limiting rings abuts against the outer surface of the conveying pipe.

[0012] Optionally, the outer surfaces of the first guide ring and the second guide ring are provided with mounting holes, and the inner walls of the plurality of mounting holes are threaded with positioning cylinders.

[0013] Optionally, a compression spring is fixedly connected to the inner top wall of the positioning cylinder, and a limit block is fixedly connected to the end of the compression spring.

[0014] Optionally, the outer surfaces of the first guide rod and the second guide rod are provided with limiting grooves that are adapted to the limiting block, and the outer surface of the limiting block is engaged with the inner wall of the limiting groove.

[0015] (III) Beneficial Effects

[0016] This utility model provides a high-performance nuclear fuel loading and unloading machine support, which has the following beneficial effects:

[0017] This high-performance nuclear fuel loading and unloading machine support, through the coordinated arrangement of the first and second guide rings, assists and guides the sliding of the first and second guide rods, allowing them to extend a sufficient distance. Therefore, during the extension of the conveying pipe, auxiliary support is formed in four directions around the pipe, and this simultaneous support in all four directions reduces the bending and swaying of the conveying pipe by leveraging the structural strength of the first and second guide rods, thereby improving the stability of the conveying pipe during operation and ensuring the accuracy of the loading and unloading machine, reducing errors. Furthermore, the separate sliding of the first and second guide rods within the first and second guide rings allows them to overlap and retract when the conveying pipe is retracted, reducing the overall length of the device, minimizing its space requirements, and enhancing its practicality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall installation structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the working state of this utility model;

[0020] Figure 3 This is a schematic diagram of the fixing ring installation structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the second guide ring structure of this utility model.

[0022] In the diagram: 1. Conveying pipe; 2. Positioning plate; 3. Positioning sleeve; 4. Fixing ring; 5. Protective cylinder; 6. First guide ring; 7. First guide rod; 8. Second guide ring; 9. Second guide rod; 10. Limiting ring; 11. Pressure rod; 12. Mounting hole; 13. Positioning cylinder; 14. Compression spring; 15. Limiting block; 16. Limiting groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figures 1 to 4 This utility model embodiment provides a support frame applicable to scenarios requiring long-distance transport during nuclear fuel loading and unloading. This embodiment improves the structure of the support frame to provide stable support and reduce bending. Specifically, taking nuclear fuel loading and unloading as an example, as a preferred solution in this embodiment, the support frame is a high-performance nuclear fuel loading and unloading machine support frame, capable of providing sufficient support for the transport pipe during nuclear fuel loading and unloading.

[0025] Please see Figures 1 to 4 This utility model provides a technical solution: a high-performance nuclear fuel loading and unloading machine support, which is mainly used in scenarios where long-distance transportation is required during nuclear fuel loading and unloading.

[0026] The device includes a conveying pipe 1, a positioning plate 2 slidably connected to the outer surface of the conveying pipe 1, a positioning sleeve 3 fixedly connected to the outer surface of the positioning plate 2, a fixing ring 4 detachably connected to the inner side wall of the positioning sleeve 3, a first guide ring 6 provided on one side of the fixing ring 4, four first guide rods 7 slidably inserted into the outer surface of the first guide ring 6, a second guide ring 8 provided on one side of the first guide ring 6, four second guide rods 9 slidably inserted into the outer surface of the second guide ring 8, and two limiting rings 10 provided on one side of the second guide ring 8.

[0027] In this embodiment, the delivery pipe 1, as the core component of the nuclear fuel loading and unloading machine, is responsible for the delivery and loading / unloading of nuclear fuel assemblies and directly participates in fuel transportation. Its stability affects the loading / unloading accuracy and safety. The positioning plate 2 is slidably connected to the delivery pipe 1, providing initial positioning and support points for the entire support system, ensuring the accurate relative position of the support and the delivery pipe 1, and reducing the risk of displacement. The positioning sleeve 3 is fixed to the outer surface of the positioning plate 2, connecting the positioning plate 2 and the fixing ring 4, enhancing the overall structural integrity, and ensuring the coordinated work of all components. The fixing ring 4 is detachably connected to the inner wall of the positioning sleeve 3, serving as the foundation of the main support structure, facilitating installation and maintenance, and providing stable support for subsequent components. The first guide ring 6 is slidably inserted into four first guide rods 7, providing a guiding function. It is connected to the positioning cylinder 13 through the mounting hole 12 to limit the guide rods and ensure the first guide rods 7 are in position. The linear sliding mechanism enhances support stability. The first guide rod 7 slides under the guidance of the first guide ring 6, providing lateral support to the conveying pipe 1 when extended, reducing bending and swaying of the conveying pipe 1 and improving loading and unloading accuracy. The second guide ring 8 slides into four second guide rods 9, working in conjunction with the first guide ring 6, connecting the ends of the first guide rods 7 to achieve a two-stage guiding structure, further enhancing guiding accuracy and supporting longer support distances. The second guide rods 9 slide under the guidance of the second guide ring 8, forming a multi-stage support together with the first guide rods 7, expanding the support range and improving the stability of the conveying pipe 1 during long-distance operation. The limiting ring 10 presses against the outer surface of the conveying pipe 1 through the pressure rod 11, limiting the radial displacement of the conveying pipe 1, fixing the position of the second guide rods 9, and ensuring the rigidity of the support structure. The double limiting design significantly reduces the swaying of the conveying pipe 1 and improves safety.

[0028] In the above embodiments, as a preferred solution, a plurality of protective cylinders 5 are fixedly connected to the outer surface of the fixing ring 4, and the outer surface of the first guide ring 6 is fixedly connected to the other end of the plurality of protective cylinders 5. By connecting the fixing ring 4 and the first guide ring 6 through the protective cylinders 5, the first guide rod 7 and the second guide rod 9 can be fully protected after they are retracted, reducing the impact of the external environment, extending the service life of the components, and improving the anti-interference ability.

[0029] In the above embodiments, as a preferred option, the outer surface of the second guide ring 8 is fixedly connected to the ends of the four first guide rods 7 respectively.

[0030] In the above embodiments, as a preferred option, the outer surface of one limiting ring 10 is fixedly connected to the outer surface of the four second guide rods 9, and the outer surface of the other limiting ring 10 is fixedly connected to the end of the four second guide rods 9.

[0031] In the above embodiment, as a preferred solution, a pressure rod 11 is threaded through the outer surface of each of the two limiting rings 10. One end of the pressure rod 11 is inserted into the two limiting rings 10 and abuts against the outer surface of the conveying pipe 1. By setting the pressure rod 11, the connection stability between the two limiting rings 10 and the conveying pipe 1 can be guaranteed, so that the two limiting rings 10 can move with the movement of the conveying pipe 1 without damaging the conveying pipe 1, and it can also be more convenient to install and fix.

[0032] In the above embodiments, as a preferred option, the outer surfaces of the first guide ring 6 and the second guide ring 8 are both provided with mounting holes 12, and the inner walls of the multiple mounting holes 12 are threaded with positioning cylinders 13. By setting the mounting holes 12, the installation accuracy of the multiple positioning cylinders 13 can be guaranteed.

[0033] In the above embodiment, as a preferred solution, a compression spring 14 is fixedly connected to the inner top wall of the positioning cylinder 13, and a limiting block 15 is fixedly connected to the end of the compression spring 14. By pushing the compression spring 14, the limiting block 15 can be pushed outward, and then after the first guide rod 7 and the second guide rod 9 slide to a suitable position, the first guide rod 7 and the second guide rod 9 are limited by the limiting block 15 and the limiting groove 16, so that the relative position of the first guide rod 7 and the second guide rod 9 with the first guide ring 6 and the second guide ring 8 remains fixed.

[0034] In the above embodiments, as a preferred option, the outer surfaces of the first guide rod 7 and the second guide rod 9 are both provided with limiting grooves 16 that are adapted to the limiting block 15, and the outer surface of the limiting block 15 is engaged with the inner wall of the limiting groove 16.

[0035] In this invention, the working steps of the device are as follows:

[0036] First, slide the positioning plate 2 along the outer surface of the conveying pipe 1 to the preset position. Then, fix the positioning plate 2 in the appropriate position by welding or bolt drilling without affecting the sliding of the conveying pipe 1. Install the fixing ring 4 on the inner wall of the positioning sleeve 3 to form the basic fixed end of the bracket. By rotating the pressure rod 11, make the end of the pressure rod 11 press against the outer surface of the conveying pipe 1 to fix the axial position of the limiting ring 10 and ensure that the limiting ring 10 moves synchronously with the conveying pipe 1.

[0037] When the conveying pipe 1 needs to extend for loading and unloading operations, the conveying pipe 1 is pushed axially, which drives the limiting ring 10 and the second guide rod 9 to move synchronously. The second guide rod 9 slides out in the second guide ring 8. When the second guide rod 9 extends to its maximum length, the limiting block 15 automatically engages in the limiting groove 16 of the guide rod under the action of the compression spring 14. At the same time, the first guide rod 7 slides out in the first guide ring 6 through the second guide ring 8, forming a multi-level support structure of "double extension". The four first guide rods 7 and the four second guide rods 9 form symmetrical support around the conveying pipe 1. The guiding effect of the guide ring ensures that the support force is evenly distributed, reducing the bending and shaking of the conveying pipe 1.

[0038] When retracted, the conveying pipe 1 drives the limiting ring 10 to retract, and with the help of the inclined setting of the limiting block 15, it disengages from the limiting groove 16, thereby driving the first guide rod 7, the second guide rod 9 and the second guide ring 8 to slide, so that the first guide rod 7 and the second guide rod 9 are inserted into the protective cylinder 5.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high performance nuclear fuel handler support comprising a transfer tube (1), characterized in that: The outer surface of the conveying pipe (1) is slidably connected to a positioning plate (2), and the outer surface of the positioning plate (2) is fixedly connected to a positioning sleeve (3). The inner side wall of the positioning sleeve (3) is detachably connected to a fixing ring (4). A first guide ring (6) is provided on one side of the fixing ring (4). Four first guide rods (7) are slidably inserted into the outer surface of the first guide ring (6). A second guide ring (8) is provided on one side of the first guide ring (6). Four second guide rods (9) are slidably inserted into the outer surface of the second guide ring (8). Two limiting rings (10) are provided on one side of the second guide ring (8).

2. A high performance nuclear fuel handler support according to claim 1, characterized in that: The outer surface of the fixed ring (4) is fixedly connected to a plurality of protective cylinders (5), and the outer surface of the first guide ring (6) is fixedly connected to the other end of the plurality of protective cylinders (5).

3. A high performance nuclear fuel handler support according to claim 1, wherein: The outer surface of the second guide ring (8) is fixedly connected to the ends of the four first guide rods (7).

4. A high performance nuclear fuel handler support according to claim 1, wherein: The outer surface of one of the limiting rings (10) is fixedly connected to the outer surface of the four second guide rods (9), and the outer surface of the other limiting ring (10) is fixedly connected to the end of the four second guide rods (9).

5. A high performance nuclear fuel handler support according to claim 1, wherein: A pressure rod (11) is threaded through the outer surface of each of the two limiting rings (10), and one end of the pressure rod (11) is inserted into the two limiting rings (10) and abuts against the outer surface of the conveying pipe (1).

6. A high performance nuclear fuel handler support according to claim 1, wherein: The outer surfaces of the first guide ring (6) and the second guide ring (8) are provided with mounting holes (12), and the inner walls of the plurality of mounting holes (12) are threaded with positioning cylinders (13).

7. A high-performance nuclear fuel loading and unloading machine support according to claim 6, characterized in that: A compression spring (14) is fixedly connected to the inner top wall of the positioning cylinder (13), and a limit block (15) is fixedly connected to the end of the compression spring (14).

8. The high-performance nuclear fuel loading and unloading machine support according to claim 7, characterized in that: The outer surfaces of the first guide rod (7) and the second guide rod (9) are provided with limiting grooves (16) that are adapted to the limiting block (15), and the outer surface of the limiting block (15) is engaged with the inner wall of the limiting groove (16).

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