Cutting and jam releasing device for fuel ball conveying pipeline of high-temperature gas cooled reactor

Abstract

The embodiment of the invention provides a high-temperature gas cooled reactor fuel ball conveying pipeline cutting and jam releasing device, and relates to the technical field of high-temperature gas cooled reactors. The high-temperature gas cooled reactor fuel ball conveying pipeline cutting jam releasing device comprises a cutting function block, the cutting function block is provided with a first end and a second end which are opposite, a first mounting hole penetrating through the first end and the second end is formed in the cutting function block, and the first end is used for abutting against a blocked fuel ball; the cutting assembly is arranged in the first mounting hole and connected with the cutting function block, and the cutting assembly is used for cutting the fuel ball abutting against the first end; and the driving assembly is detachably arranged at the second end, and the driving assembly is used for driving the cutting function block to move. The problem that the blocked fuel balls in the conveying pipeline are inconvenient to release at present is solved, and continuous and stable operation of the high-temperature gas cooled reactor is guaranteed.

Description

A cutting and unblocking device for fuel sphere delivery pipes in a high-temperature gas-cooled reactor Technical Field

[0001] This invention relates to the field of high-temperature gas-cooled reactor technology, and more specifically, to a cutting and unblocking device for a fuel ball delivery pipeline in a high-temperature gas-cooled reactor. Background Technology

[0002] The pebble bed high-temperature gas-cooled reactor (HTGR) is an advanced nuclear reactor with inherent safety, suitable for efficient power generation and high-temperature heating. It uses graphite-based spherical fuel spheres as combustion elements. The HTGR fuel loading and unloading system is one of the key systems for achieving and ensuring continuous reactor operation, enabling the continuous loading, circulation, and unloading of spherical fuel elements during reactor operation. By continuously loading fuel spheres, circulating them within the core, and unloading spent fuel spheres, reactor shutdown is unnecessary, significantly improving reactor operating efficiency and economy. The core transport path of the fuel loading and unloading system is the "fuel sphere transport pipeline," where fuel spheres are transported along the pipeline under the influence of gravity or gas flow.

[0003] The inventors discovered that during the transmission process, the fuel balls may break due to friction and collision between the balls and between the balls and the inner wall of the pipe, and graphite powder may adhere to the surface. This can lead to abnormal situations such as fuel ball blockage and accumulation in the transmission pipe.

[0004] Because fuel spheres are typically highly radioactive and fuel sphere blockage occurs within high-temperature, enclosed pipelines, there are currently no effective methods for unblocking them. This makes it difficult to unblock fuel spheres in the delivery pipelines, affecting the continuous and stable operation of the high-temperature gas-cooled reactor. Summary of the Invention

[0005] The present invention aims to provide a cutting and unblocking device for fuel ball delivery pipelines in high-temperature gas-cooled reactors, which can improve the current problem of inconvenience in unblocking fuel balls in delivery pipelines and ensure the continuous and stable operation of high-temperature gas-cooled reactors.

[0006] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a cutting and unblocking device for a fuel ball delivery pipeline of a high-temperature gas-cooled reactor, comprising: a cutting functional block having a first end and a second end opposite to each other, a first mounting hole penetrating the first end and the second end being provided in the cutting functional block, the first end being used to abut against the blocked fuel ball; a cutting assembly disposed in the first mounting hole and connected to the cutting functional block, the cutting assembly being used to cut the fuel ball abutting against the first end; and a driving assembly detachably disposed at the second end, the driving assembly being used to drive the cutting functional block to move.

[0007] In an optional embodiment, the cutting assembly includes a cutting motor and a cutting disc, the cutting motor is disposed on the cutting functional block, the shaft of the cutting motor extends toward the first end, and the cutting disc is disposed on the shaft of the cutting motor.

[0008] In an optional embodiment, the cutting disc includes a plurality of equally spaced cutting blades, and a plurality of cutting steel pins are provided on the cutting blades.

[0009] In an optional embodiment, the cutting and unblocking device further includes a mounting bracket, which is disposed in the first mounting hole and connected to the cutting functional block, and the cutting motor is mounted on the mounting bracket.

[0010] In an optional embodiment, the drive assembly includes a connecting block and an external drive device. The connecting block includes a connecting portion and a drive portion. The connecting portion is detachably connected to the second end. The drive portion is connected to the external drive device, which is used to drive the cutting function block to move along the conveying pipeline.

[0011] In an optional embodiment, both the connecting block and the cutting functional block are cylindrical structures, and the first mounting hole is coaxial with the cutting functional block.

[0012] In an optional embodiment, the connecting portion is provided with a plurality of flange holes.

[0013] In an optional embodiment, the first end has a bonding surface, which is a concave spherical arc surface for bonding with the fuel ball, and the bonding surface is made of a high-temperature resistant material.

[0014] In an optional embodiment, the cutting and unblocking device further includes a camera, which is disposed within the cutting functional block and the lens of the camera faces the first end.

[0015] In an optional embodiment, a second mounting hole is also provided in the cutting function block, the second mounting hole penetrates through the first end, and the camera is disposed in the second mounting hole.

[0016] The beneficial effects of the high-temperature gas-cooled reactor fuel ball delivery pipeline cutting and unblocking device provided in this invention include: when a fuel ball becomes stuck in the delivery pipeline, the cutting functional block is driven by the driving component to move along the delivery pipeline to the stuck position, so that the first end abuts against the stuck fuel ball. The cutting component then cuts and breaks the fuel ball into fragments, thus unblocking it. This is particularly suitable for situations where the resistance to fuel ball blockage is high, and ordinary methods of loosening stuck fuel balls cannot effectively solve the problem. It improves the current problem of inconvenience in unblocking fuel balls in the delivery pipeline, ensuring the continuous and stable operation of the high-temperature gas-cooled reactor. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the cutting and unblocking device for the fuel ball delivery pipeline of the high-temperature gas-cooled reactor provided in this embodiment; Figure 2 is a schematic diagram of the cutting function block provided in this embodiment.

[0019] Icons: 100-Cutting function block; 110-First mounting hole; 120-Second mounting hole; 130-Mating surface; 200-Cutting assembly; 210-Cutting disc; 211-Cutting blade; 212-Cutting steel nail; 220-Cutting motor; 230-Mounting bracket; 300-Connecting block; 310-Connecting part; 311-Flange hole; 320-Drive part; 400-Camera. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention.

[0024] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0026] The following detailed description of the overall structure, working principle, and technical effects of the high-temperature gas-cooled reactor fuel ball delivery pipeline cutting and unblocking device provided by the present invention, through embodiments and in conjunction with the accompanying drawings, illustrates these features.

[0027] Referring to Figures 1 and 2, this invention provides a cutting and unblocking device for fuel ball delivery pipelines in high-temperature gas-cooled reactors. This device is used in pebble bed type high-temperature gas-cooled reactors to cut and unblock fuel balls stuck in the delivery pipelines, thereby clearing and unblocking the blockage. This improves upon the current lack of effective unblocking methods and the inconvenience of unblocking delivery pipelines, ensuring the continuous and stable operation of high-temperature gas-cooled reactors.

[0028] Referring to Figures 1 and 2, the cutting and unblocking device for the fuel sphere delivery pipeline of a high-temperature gas-cooled reactor includes a cutting functional block 100, a cutting assembly 200, and a drive assembly. The cutting functional block 100 has a first end and a second end opposite to each other. A first mounting hole 110 is formed within the cutting functional block 100, extending through both the first and second ends. When the cutting functional block 100 moves to the blocked position, the first end is used to abut against the blocked fuel sphere. The cutting assembly 200 is disposed within the first mounting hole 110 and connected to the cutting functional block 100. When the first end abuts against the blocked fuel sphere, the cutting assembly 200 is used to cut and break the fuel sphere, thereby unblocking it. The drive assembly is detachably disposed at the second end and is used to drive the cutting functional block 100 to move.

[0029] When fuel balls become stuck in the delivery pipeline, the cutting functional block 100 is driven by the drive assembly to move along the pipeline to the stuck position, so that its first end abuts against the stuck fuel ball. The cutting assembly 200 then cuts and breaks the fuel ball into fragments, thus releasing it from the jam. This is particularly suitable for situations where the resistance to fuel ball jamming is high, and ordinary methods of loosening the stuck fuel ball are ineffective. It improves upon the current difficulty in releasing fuel balls stuck in the delivery pipeline, ensuring the continuous and stable operation of the high-temperature gas-cooled reactor.

[0030] Referring to Figure 1, in some optional embodiments, the cutting assembly 200 includes a cutting motor 220 and a cutting disc 210. The cutting motor 220 is disposed within the cutting functional block 100, and the shaft of the cutting motor 220 extends toward the first end. The cutting disc 210 is disposed on the shaft of the cutting motor 220. The cutting motor 220 drives the cutting disc 210 to rotate, thereby achieving the cutting and crushing of the fuel balls. Further, the cutting disc 210 includes a disc bushing, cutting blades 211, and cutting spikes 212. One end of the disc bushing is detachably connected to the shaft of the cutting motor 220, and the cutting blades 211 are disposed at the other end of the disc bushing. In this embodiment, four cutting blades 211 are arranged around the blade bearing at equal intervals, and three cutting spikes 212 are mounted perpendicular to the surface of each cutting blade 211. In some other alternative embodiments, the cutting blades 211 can be configured as a plurality of blades. The plurality of cutting blades 211 only need to be arranged at equal intervals to balance the counterweight, and a plurality of cutting steel nails 212 can also be provided on the cutting blades 211. In order to ensure the cutting and crushing effect of the cutting steel nails 212 on the fuel ball, the length of the cutting steel nails 212 is not less than 3 mm, and the diameter of the cutting steel nails 212 is not less than 1.5 mm.

[0031] The cutting motor 220 drives the cutting disc 210 to rotate, and then the cutting steel nails 212 on the cutting blade 211 cut and break the stuck fuel ball, so as to achieve the cutting and breaking effect of the cutting assembly 200 on the fuel ball.

[0032] Referring to Figures 1 and 2, further, in order to facilitate the installation of the cutting assembly 200 into the cutting functional block 100, in some optional embodiments, the cutting release device also includes a mounting bracket 230. The mounting bracket 230 is disposed in the first mounting hole 110 and connected to the cutting functional block 100. The mounting bracket 230 has a tubular structure, and the cutting motor 220 is installed in the mounting bracket 230.

[0033] Referring to Figure 1, in some optional embodiments, the drive assembly includes a connecting block 300 and an external drive device. The connecting block 300 includes a connecting portion 310 and a drive portion 320. The connecting portion 310 is detachably connected to the second end, and the drive portion 320 is connected to the external drive device. The external drive device is used to drive the cutting functional block 100 to move along the conveying pipe, so that the cutting functional block 100 moves to the jamming point. Further, a through hole is provided on the connecting block 300 along the direction of the first mounting hole 110 for the cable of the cutting motor 220 to pass through. In this embodiment, the drive portion 320 is used to connect a flexible hose, and the cutting functional block 100 is driven to move along the conveying pipe through the external mechanical structure of the flexible hose. It is understood that in this embodiment, the external drive device can be manually driven, a winch device, or a pipe moving robot, etc., as long as it can drive the cutting and unblocking device to move within the conveying pipe. The specific structural form of the external drive device is not limited in this embodiment.

[0034] Referring to Figures 1 and 2, in this embodiment, to facilitate the entry of the cutting functional block 100 and the connecting block 300 into the conveying pipe and their movement along the conveying pipe, both the cutting functional block 100 and the connecting block 300 are cylindrical structures with smooth surfaces. The diameters of both the cutting functional block 100 and the connecting block 300 are less than 60 mm, and the total length when connected is less than 150 mm. The first mounting hole 110 is located at the center of the cutting functional block 100, meaning the first mounting hole 110 is coaxial with the cutting functional block 100, so that the cutting assembly 200 is located at the center of the cutting functional block 100 to balance the counterweight and prevent the cutting functional block 100 from vibrating excessively due to the deflection of the center of gravity when the cutting assembly 200 is working. The cutting motor 220 is a small-diameter cylindrical motor with a diameter of less than 40mm, so as to facilitate installation into the first mounting hole 110. At the same time, the cutting motor 220 is fixed to the mounting bracket 230 by interference fit or by locking screws, key connection or other means to prevent the cutting motor 220 from moving axially or radially during operation.

[0035] Referring to Figure 1, further, in order to facilitate the detachable installation of the connecting block 300 onto the cutting function block 100, in some optional embodiments, a plurality of flange holes 311 are provided around the edge of the connecting block 300, and the connecting block 300 is detachably connected to the cutting function block 100 by bolts or pins or other connecting parts passing through the flange holes 311.

[0036] Referring to Figures 1 and 2, in order to ensure that the first end of the cutting functional block 100 can closely adhere to the fuel ball when it abuts against the fuel ball, so that the cutting assembly 200 can cut and break the fuel ball, in some optional embodiments, the first end has a contact surface 130. The contact surface 130 is a concave spherical arc surface, and the contact surface 130 is recessed towards the inside of the cutting functional block 100, so that the contact surface 130 has an arc structure, and the curvature of the contact surface 130 is consistent with the curvature of the fuel ball. In this embodiment, the outer diameter of the fuel ball is 60 mm, and the arc radius of the contact surface 130 is 30 mm ± 0.2 mm, so that the contact area between the contact surface 130 and the surface of the fuel ball is ≥ 90%. Furthermore, the contact surface 130 is made of a high-temperature resistant material to prevent the contact surface 130 from softening or deforming due to the high temperature of the fuel ball when it is in contact with the fuel ball.

[0037] Referring to Figures 1 and 2, in some optional embodiments, the cutting and unblocking device further includes a camera 400, which is installed within the cutting functional block 100. A second mounting hole 120 is provided within the cutting functional block 100, penetrating the first end, and the camera 400 is installed within the second mounting hole 120. The camera 400 allows for real-time observation of the blockage situation within the conveying pipeline and enables monitoring of the unblocking status during the cutting and unblocking process, thereby improving unblocking efficiency. Furthermore, to adapt to the high-temperature and high-radiation environment within the conveying pipeline, the camera 400 is a high-temperature resistant and radiation-proof high-definition camera 400, capable of withstanding temperatures up to 200°C and temperatures up to 10... 5 Gy radiation. Furthermore, the camera 400 and the cutting function block 100 are fixed by an interference fit or other fixing structures (such as pins, fixing screws, etc.) to prevent the camera 400 from loosening or vibrating during the cutting and unblocking process.

[0038] In summary, the operating principle of the high-temperature gas-cooled reactor fuel sphere delivery pipeline cutting and unblocking device provided by this invention is as follows: When a fuel sphere becomes stuck in the delivery pipeline, the cutting functional block 100 is driven by the driving component to move along the delivery pipeline to the stuck position, so that the first end abuts against the stuck fuel sphere. The cutting component 200 then cuts and breaks the fuel sphere into fragments, thus unblocking it. This improves upon the current problem of inconvenience in unblocking fuel spheres in the delivery pipeline, ensuring the continuous and stable operation of the high-temperature gas-cooled reactor.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A cutting and unblocking device for a fuel sphere delivery pipeline in a high-temperature gas-cooled reactor, characterized in that, include: A cutting functional block having a first end and a second end opposite to each other, a first mounting hole penetrating the first end and the second end being provided in the cutting functional block, the first end being used to abut against the plugging fuel ball; a cutting assembly disposed in the first mounting hole and connected to the cutting functional block, the cutting assembly being used to cut the fuel ball abutting against the first end; and a driving assembly detachably disposed at the second end, the driving assembly being used to drive the cutting functional block to move.

2. The high-temperature gas-cooled reactor fuel sphere delivery pipeline cutting and unblocking device according to claim 1, characterized in that, The cutting assembly includes a cutting motor and a cutting disc. The cutting motor is disposed on the cutting functional block, and the rotating shaft of the cutting motor extends toward the first end. The cutting disc is disposed on the rotating shaft of the cutting motor.

3. The high-temperature gas-cooled reactor fuel sphere delivery pipeline cutting and unblocking device according to claim 2, characterized in that, The cutting disc includes several cutting blades arranged at equal intervals, and several cutting steel pins are provided on the cutting blades.

4. The high-temperature gas-cooled reactor fuel sphere delivery pipeline cutting and unblocking device according to claim 2, characterized in that, The cutting and unblocking device also includes a mounting bracket, which is disposed in the first mounting hole and connected to the cutting function block, and the cutting motor is mounted on the mounting bracket.

5. The high-temperature gas-cooled reactor fuel sphere delivery pipeline cutting and unblocking device according to claim 1, characterized in that, The drive assembly includes a connecting block and an external drive device. The connecting block includes a connecting part and a drive part. The connecting part is detachably connected to the second end. The drive part is connected to the external drive device. The external drive device is used to drive the cutting function block to move along the conveying pipeline.

6. The high-temperature gas-cooled reactor fuel sphere delivery pipeline cutting and unblocking device according to claim 5, characterized in that, Both the connecting block and the cutting function block are cylindrical structures, and the first mounting hole is coaxial with the cutting function block.

7. The high-temperature gas-cooled reactor fuel sphere delivery pipeline cutting and unblocking device according to claim 5, characterized in that, The connecting part is provided with multiple flange holes.

8. The high-temperature gas-cooled reactor fuel sphere delivery pipeline cutting and unblocking device according to any one of claims 1-7, characterized in that, The first end has a bonding surface, which is a concave spherical arc surface for bonding with the fuel ball, and the bonding surface is made of a high-temperature resistant material.

9. The high-temperature gas-cooled reactor fuel sphere delivery pipeline cutting and unblocking device according to any one of claims 1-7, characterized in that, The cutting and unblocking device also includes a camera, which is disposed within the cutting functional block and the lens of the camera faces the first end.

10. The high-temperature gas-cooled reactor fuel sphere delivery pipeline cutting and unblocking device according to claim 9, characterized in that, The cutting function block is also provided with a second mounting hole, which penetrates through the first end, and the camera is disposed in the second mounting hole.

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