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

Abstract

The embodiment of the invention provides an impact jam releasing device for a fuel ball conveying pipeline of a high-temperature gas cooled reactor, and relates to the field of high-temperature gas cooled reactors. The impact jam releasing device comprises an impact block, wherein the impact block is provided with a first end and a second end which are opposite in the axial direction; the moving part is connected with the first end of the impact block and used for driving the impact block to move along the ball path pipeline; the impact head is movably arranged in the impact block; and the impact driving piece is arranged in the impact block, is connected with the impact head and is used for driving the impact head to move in the axial direction of the impact block so as to drive the impact head to extend out of the second end or retract into the impact block. The impact jam releasing device provided by the invention can solve the problem that the blocked fuel balls in the ball path pipeline are inconvenient to dredge at present, and ensures the continuous and stable operation of the high-temperature gas cooled reactor.

Description

Technical Field

[0001] This invention relates to the field of high-temperature gas-cooled reactor technology, and more specifically, to a device for impact-unblocking a fuel ball delivery pipeline for 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 "pebble path conduit," where fuel spheres are transported along the conduit under the influence of gravity or gas flow.

[0003] The inventors discovered that during the transmission process, friction and collision between the balls and between the balls and the inner wall of the pipe, as well as the presence of graphite powder on the surface of the fuel balls and bends in the pipeline itself, can easily lead to abnormal situations such as fuel ball blockage and accumulation in the pipeline.

[0004] Because fuel spheres are typically highly radioactive and fuel sphere blockages occur within high-temperature, enclosed pipelines, there are currently no effective methods for unblocking them. This makes it difficult to clear the blockages in the fuel sphere 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 an impact unblocking device for fuel ball delivery pipelines in high-temperature gas-cooled reactors, which can improve the current problem of difficulty in clearing fuel balls stuck in the ball passage pipeline, 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 an impact release device for a fuel sphere delivery pipeline of a high-temperature gas-cooled reactor, comprising: An impact block having a first end and a second end that are axially opposed to each other; A movable component is connected to the first end of the impact block and is used to drive the impact block to move along the ball path pipe; The impact head is movably disposed within the impact block; An impact drive is disposed within the impact block. The impact drive is connected to the impact head and is used to drive the impact head to move axially along the impact block, so as to drive the impact head to extend out of the second end or retract into the impact block.

[0007] In an optional embodiment, the second end of the impact block has an arc-shaped contact surface for contacting the fuel ball.

[0008] In an optional embodiment, the bonding surface is covered with a high-temperature resistant material layer.

[0009] In an optional embodiment, a first mounting hole is coaxially formed inside the impact block, and the impact drive component is disposed within the first mounting hole.

[0010] In an optional embodiment, the high-temperature gas-cooled reactor fuel ball delivery pipeline impact release device further includes a mounting frame, which is disposed on the impact block and located in the first mounting hole, and the impact drive is disposed on the mounting frame.

[0011] In an optional embodiment, the second end of the impact block is provided with a second mounting hole along the axial direction, and a camera is disposed in the second mounting hole.

[0012] In an optional embodiment, the moving component includes a connecting block and a connecting head. The connecting head is disposed at one end of the connecting block, and the other end of the connecting block is detachably connected to the first end of the impact block. The connecting head is used to connect with an external driving component and to drive the impact release device to move along the ball path pipe under the drive of the external driving component.

[0013] In an optional embodiment, both the impact block and the connecting block are cylindrical.

[0014] In an optional embodiment, the connecting block has several flange holes, and the connecting block is detachably connected to the impact block by bolts passing through the flange holes.

[0015] In an optional embodiment, the impact block has a first mounting hole, and the connecting block has a through hole along the axial direction. The through hole passes through the connector and communicates with the first mounting hole.

[0016] The beneficial effects of the high-temperature gas-cooled reactor fuel sphere delivery pipeline impact release device provided in this embodiment of the invention include: The impact block is moved along the spherical pipeline by a moving component, and then moved to the blockage point to meet the blocked fuel sphere. The impact drive component then drives the impact head to impact the blocked fuel sphere, causing the blocked fuel sphere to loosen due to the impact. This removes the blockage of the fuel sphere in the spherical pipeline, improves the current problem of not being able to clear the blockage of fuel sphere in the spherical pipeline, and ensures 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 This is an exploded view of the impact release device for the fuel sphere delivery pipeline of the high-temperature gas-cooled reactor provided in this embodiment; Figure 2 This is a side view of the impact block provided in this embodiment.

[0019] Icons: 100-Impact block; 110-Mating surface; 120-First mounting hole; 200-Moving component; 210-Connecting block; 211-Flange hole; 212-Through hole; 220-Connector; 300-Impact head; 400-Impact drive component; 500-Mounting bracket; 600-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 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 a key system for achieving and ensuring continuous reactor operation, enabling the continuous loading, circulation, and unloading of spherical fuel elements during reactor operation. Continuously completing fuel sphere loading, core circulation, and spent fuel sphere unloading eliminates the need for reactor shutdown, significantly improving reactor operating efficiency and economy. However, due to the graphite matrix of the fuel spheres, which is hard and brittle, friction and collisions between spheres and between spheres and the inner wall of the pipes during transport easily generate dust and debris. Furthermore, the bends in the fuel sphere pipelines themselves can lead to fuel sphere blockage and accumulation.

[0027] Meanwhile, since fuel spheres are usually highly radioactive and fuel sphere blockage occurs in high-temperature closed pipelines, there are currently no effective means of unblocking them. This makes it inconvenient to clear the blocked fuel spheres in the sphere pipelines, affecting the continuous and stable operation of the high-temperature gas-cooled reactor fuel loading and unloading system.

[0028] The following detailed description of the overall structure, working principle, and technical effects of the high-temperature gas-cooled reactor fuel ball delivery pipeline impact release device provided by the present invention, through embodiments and in conjunction with the accompanying drawings, is a practical example.

[0029] Please refer to Figure 1 and Figure 2 This invention provides an impact unblocking device for fuel ball delivery pipelines in high-temperature gas-cooled reactors, used in pebble bed type high-temperature gas-cooled reactors, to clear and unblock fuel balls stuck in the pebble path pipelines, improving the current problem of no effective unblocking means and inconvenience in unblocking pebble path pipelines, and ensuring the continuous and stable operation of high-temperature gas-cooled reactors.

[0030] Please refer to Figure 1 and Figure 2The high-temperature gas-cooled reactor fuel ball delivery pipeline impact unblocking device provided by the present invention includes an impact block 100, a moving part 200, an impact head 300, and an impact driving part 400. The impact block 100 has a first end and a second end opposite each other in the axial direction. The moving part 200 is connected to the first end of the impact block 100 and is used to drive the impact block 100 to move along the ball passage pipeline within the pipeline, thereby driving the impact block 100 to the blockage location. The impact head 300 is movably disposed inside the impact block 100, and the impact driving part 400 is also disposed inside the impact block 100. The impact driving part 400 is connected to the impact head 300 and drives the impact head 300 to move axially along the impact block 100, thereby driving the impact head 300 to extend beyond its second end or retract into the impact block 100. The movement of the impact head 300 impacts the fuel ball blocking the ball passage pipeline, thereby releasing the blockage.

[0031] The moving part 200 drives the impact block 100 to move along the ball path pipe, thereby moving the impact block 100 to the blockage location and pressing against the blockage fuel ball. Then, the impact driving part 400 drives the impact head 300 to impact the blockage fuel ball, causing the blockage fuel ball to loosen due to the impact, thereby relieving the blockage of the fuel ball in the ball path pipe.

[0032] Please refer to Figure 1 To facilitate a tight fit between the impact block 100 and the stuck fuel ball, thereby improving the impact release effect, in some optional embodiments, an arc-shaped contact surface 110 is provided at the second end of the impact block 100 to facilitate contact with the surface of the fuel ball. Specifically, the contact surface 110 adopts a concave spherical arc surface with the same curvature as the 60mm outer diameter fuel ball, and the arc radius is 30mm ± 0.2mm, to ensure that the contact area between the contact surface 110 and the surface of the fuel ball is ≥90%. Furthermore, a high-temperature resistant material layer is also coated on the contact surface 110 to prevent the impact head 300 from softening or deforming due to high temperature when the contact surface 110 comes into contact with the high-temperature fuel ball.

[0033] Please refer to Figure 1 and Figure 2In some optional embodiments, a first mounting hole 120 is coaxially formed within the impact block 100, extending axially through the impact block 100, and the impact drive component 400 is disposed within the first mounting hole 120. Further, the high-temperature gas-cooled reactor fuel sphere delivery pipeline impact release device also includes a mounting frame 500, which is annular in structure, mounted on the impact block 100 and located within the first mounting hole 120, with the impact drive component 400 mounted on the mounting frame 500. Thus, the mounting frame 500 facilitates the mounting of the impact drive component 400 onto the impact block 100. In other optional embodiments, the impact drive component 400 can also be detachably mounted on the impact block 100 using locking screws, key connections, or other methods.

[0034] In this embodiment, the impact drive 400 is an impact cylinder with a small-diameter cylindrical structure for easy installation into the first mounting hole 120. The impact cylinder is also heat-resistant and radiation-proof. The impact head 300 is welded to the head of the impact cylinder. By adjusting the external air pressure, the impact force and speed of the impact head 300 can be controlled, thereby adjusting the impact force and speed during the unlocking process. The air pipe supplying power to the impact cylinder extends along the first mounting hole 120 from the first end to the outside of the impact block 100, facilitating power supply from an external air source. In some optional embodiments, the impact drive 400 can also be a hydraulic cylinder, electric cylinder, linear motor, or other device capable of driving the impact head 300 to move axially along the impact block 100. Furthermore, in order to improve the structural strength of the impact head 300, the impact head 300 is made of high alloy steel. The impact head 300 has a cylindrical structure with a length of 35mm and a diameter of 8mm. The impact head 300 and the impact drive component 400 are fixedly connected by welding or flange connection at their ends.

[0035] Please refer to Figure 1 In some optional embodiments, the second end of the impact block 100 has a second mounting hole along the axial direction. A camera 600 is installed in the second mounting hole. The camera 600 moves with the impact block 100 in the ball path pipe to facilitate real-time observation of the situation inside the ball path pipe and the unblocking process. To facilitate the installation of the camera 600, the camera 600 is cylindrical with a small diameter. The camera 600 is installed in the second mounting hole with an interference fit or by using a fixing device to prevent the camera 600 from loosening during the unblocking process. To ensure the normal operation of the camera 600, the camera 600 is a high-temperature resistant, radiation-proof high-definition camera 600, ensuring that the camera 600 can withstand a high temperature of 200℃ and a high temperature of 10℃. 5 Gy radiation.

[0036] Please refer to Figure 1In some optional embodiments, the moving component 200 includes a connecting block 210 and a connecting head 220. The connecting head 220 is disposed at one end of the connecting block 210, and the other end of the connecting block 210 is detachably connected to the first end of the impact block 100. The connecting head 220 is used to connect with an external driving component and to drive the impact release device of the high-temperature gas-cooled reactor fuel sphere delivery pipeline to move along the sphere path pipeline under the drive of the external driving component. The external driving component can be manually driven, driven by a winch device, or a pipeline moving robot, etc., as long as it can drive the impact release device to move within the sphere path pipeline. In this embodiment, the specific structural form of the external driving component is not limited.

[0037] Please refer to Figure 1 Furthermore, in order to facilitate the movement of the impact release device within the ball path pipe, in this embodiment, both the impact block 100 and the connecting block 210 are cylindrical structures, and the diameters of both the impact block 100 and the connecting block 210 are less than 60mm, the overall length of the impact block 100 and the connecting block 210 is less than 150mm, and the outer walls of both are smoothly arranged.

[0038] Please refer to Figure 1 In this embodiment, in order to facilitate the connection between the connecting block 210 and the impact block 100, a number of flange holes 211 are provided on the connecting block 210 at intervals. The number of flange holes 211 is not less than four. The connecting block 210 and the impact block 100 are detachably connected by bolts passing through the flange holes 211, so as to ensure that the connection between the connecting block 210 and the impact block 100 is firm.

[0039] Please refer to Figure 1 In this embodiment, a first mounting hole 120 is provided in the impact block 100, and a through hole 212 is provided axially in the connecting block 210. The through hole 212 passes through the connector 220 and communicates with the first mounting hole 120. The through hole 212 and the first mounting hole 120 are used for the signal line and power line of the camera 600 to pass through, and for the power supply pipe that supplies power to the impact drive component 400 to pass through.

[0040] In summary, the implementation principle of the high-temperature gas-cooled reactor fuel ball delivery pipeline impact unblocking device provided by the present invention is as follows: the moving part 200 drives the impact block 100 to move along the ball path pipeline, moves the impact block 100 to the blockage location and abuts against the blockage fuel ball, and then the impact driving part 400 drives the impact head 300 to impact the blockage fuel ball, so that the blockage fuel ball is loosened by the impact, thereby unblocking the fuel ball in the ball path pipeline, improving the current problem of inconvenience in clearing the blockage fuel ball in the ball path pipeline, and ensuring the continuous and stable operation of the high-temperature gas-cooled reactor.

[0041] 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 device for impact-unblocking a fuel sphere delivery pipeline in a high-temperature gas-cooled reactor, characterized in that, include: An impact block having a first end and a second end that are axially opposed to each other; A movable component is connected to the first end of the impact block and is used to drive the impact block to move along the ball path pipe; The impact head is movably disposed within the impact block; An impact drive is disposed within the impact block. The impact drive is connected to the impact head and is used to drive the impact head to move axially along the impact block, so as to drive the impact head to extend out of the second end or retract into the impact block.

2. The impact release device for the fuel sphere delivery pipeline of a high-temperature gas-cooled reactor according to claim 1, characterized in that, The second end of the impact block has an arc-shaped contact surface for contacting the fuel ball.

3. The impact release device for the fuel sphere delivery pipeline of a high-temperature gas-cooled reactor according to claim 2, characterized in that, The bonding surface is covered with a high-temperature resistant material layer.

4. The impact release device for the fuel sphere delivery pipeline of a high-temperature gas-cooled reactor according to claim 1, characterized in that, The impact block has a first mounting hole coaxially formed inside it, and the impact drive component is disposed inside the first mounting hole.

5. The impact release device for the high-temperature gas-cooled reactor fuel sphere delivery pipeline according to claim 4, characterized in that, The high-temperature gas-cooled reactor fuel ball delivery pipeline impact release device also includes a mounting frame, which is disposed on the impact block and located in the first mounting hole, and the impact drive component is disposed on the mounting frame.

6. The impact release device for the fuel sphere delivery pipeline of a high-temperature gas-cooled reactor according to claim 1, characterized in that, The second end of the impact block has a second mounting hole along the axial direction, and a camera is installed in the second mounting hole.

7. The impact release device for the fuel sphere delivery pipeline of a high-temperature gas-cooled reactor according to any one of claims 1-6, characterized in that, The moving component includes a connecting block and a connecting head. The connecting head is disposed at one end of the connecting block, and the other end of the connecting block is detachably connected to the first end of the impact block. The connecting head is used to connect with an external driving component and to drive the impact release device to move along the ball path pipe under the drive of the external driving component.

8. The impact release device for the fuel sphere delivery pipeline of a high-temperature gas-cooled reactor according to claim 7, characterized in that, Both the impact block and the connecting block are cylindrical.

9. The impact release device for the fuel sphere delivery pipeline of a high-temperature gas-cooled reactor according to claim 7, characterized in that, The connecting block has several flange holes, and the connecting block is detachably connected to the impact block by bolts passing through the flange holes.

10. The impact release device for the fuel sphere delivery pipeline of a high-temperature gas-cooled reactor according to claim 7, characterized in that, The impact block has a first mounting hole, and the connecting block has a through hole along the axial direction. The through hole passes through the connecting head and communicates with the first mounting hole.

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