A blowing and sucking unclogging device for a high temperature gas cooled reactor fuel sphere conveying pipeline

Abstract

The embodiment of the present application provides a kind of high temperature gas cooled reactor fuel ball conveying pipeline blow suction declogging device, it is related to high temperature gas cooled reactor technical field.The declogging device provided by the present application includes blow suction function block and connecting block, blow suction function block has opposite first end and second end, first end is provided with the end plate for being attached with fuel ball surface, blow suction function block is opened in and is equipped with the air suction passage passing through first end and second end, blow suction function block is also opened in and is equipped with the air blowing passage passing through second end, end plate is opened in and is equipped with a plurality of air blowing port with air blowing passage communication;Connecting block is detachably arranged at the second end of blow suction function block, connecting block is opened in and is equipped with the first through hole with air suction passage communication, second through hole with air blowing passage communication, first through hole is communicated with external air suction gas source, second through hole is communicated with external air blowing gas source.The present application is convenient for the fuel ball of transmission pipeline to be stuck to carry out declogging, guarantees the continuous stable operation of 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 purge and de-jamming 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 "transfer pipeline," where fuel spheres are transported under the influence of gravity or gas flow.

[0003] The inventors discovered that during the transmission process, friction and collision between fuel balls and between the balls and the inner wall of the pipe can cause graphite powder to adhere to the surface of the fuel balls, which 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 transmission 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 blow-and-unblock device for fuel ball delivery pipeline of high-temperature gas-cooled reactor, which can facilitate the unblocking of fuel balls stuck in the delivery pipeline and ensure the continuous and stable operation of high-temperature gas-cooled reactor.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention provides a purge and de-jamming device for a fuel sphere delivery pipeline in a high-temperature gas-cooled reactor, comprising:

[0008] The blowing and suction function block has a first end and a second end opposite to each other. The first end is provided with an end plate for fitting with the spherical surface of the fuel ball. The blowing and suction function block has an air intake channel that passes through the first end and the second end. The blowing and suction function block also has an air blowing channel that passes through the second end. The end plate has a plurality of air blowing ports that communicate with the air blowing channels.

[0009] A connecting block is detachably disposed at the second end of the blowing and suction function block. The connecting block has a first through hole communicating with the suction channel and a second through hole communicating with the blowing channel. The first through hole is connected to an external suction air source, and the second through hole is connected to an external blowing air source.

[0010] In an optional embodiment, the card unlocking device further includes a camera, and a mounting block connected to the end plate is provided in the air intake channel. The mounting block has a mounting hole for mounting the camera, and the lens of the camera faces the first end.

[0011] In an optional embodiment, both the blowing and suction functional block and the connecting block are cylindrical.

[0012] In an optional embodiment, the air intake channel is located at the axis of the air blowing and suction functional block, and the air blowing channel is located around the outside of the air intake channel.

[0013] In an optional embodiment, the end plate is a spherical arc surface that is concave toward the second end for fitting with the fuel ball.

[0014] In an optional embodiment, the surface of the end plate is covered with a high-temperature resistant material layer, the hardness of which is less than that of the fuel ball.

[0015] In an optional embodiment, a plurality of the air inlets are equally spaced along a circular trajectory on the end plate.

[0016] In an optional embodiment, the axis of the air outlet and the axis of the air blowing / suction functional block form an angle of 15°.

[0017] In an optional embodiment, the card release device further includes a partition plate, which is disposed around the blow-suction functional block and connected to the end plate. The partition plate is used to separate the interior of the blow-suction functional block so that the suction channel is located inside the partition plate and the blowing channel is located between the inner wall of the blow-suction functional block and the partition plate. When the connecting block is disposed at the second end, the connecting block abuts against the partition plate.

[0018] In an optional embodiment, one end of the connecting block is provided with a first stepped surface, and the second end of the blowing and suction functional block has a second stepped surface adapted to the first stepped surface.

[0019] The beneficial effects of the blow-suction unblocking device for the fuel ball delivery pipeline of the high-temperature gas-cooled reactor provided in this embodiment of the invention include: when the fuel ball delivery pipeline is blocked, the unblocking device is sent along the pipeline to the blockage location, so that the end plate of the first end of the blow-suction functional block is in contact with the blocked fuel ball. First, an external air source is used to try to adsorb the fuel ball through the air intake channel. If the fuel ball can be adsorbed and moved, the unblocking device is driven to move to remove the adsorbed fuel ball. If the fuel ball cannot be adsorbed, an external air source blows air through the air blowing channel to the blocked fuel ball, impacting the blocked fuel ball and loosening it. Then, the blow-suction functional block adsorbs and removes the fuel ball. The unblocking device provided by this invention has both blowing and suction functions, which facilitates the unblocking of the fuel ball and the removal of the fuel ball from the delivery pipeline. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is an exploded view of the blow-suction and de-clamping device for the fuel sphere delivery pipeline of the high-temperature gas-cooled reactor provided in this embodiment;

[0022] Figure 2 This is an overall schematic diagram of the blow-suction and de-jamming device for the high-temperature gas-cooled reactor fuel ball delivery pipeline provided in this embodiment;

[0023] Figure 3 This is a schematic diagram of the blowing and suction function block provided in this embodiment.

[0024] Icons: 100-Blowing and suction function block; 110-End plate; 111-Blowing port; 120-Suction channel; 130-Blowing channel; 140-Second step surface; 200-Connecting block; 210-First through hole; 220-Second through hole; 230-First step surface; 300-Camera; 310-Mounting block; 400-Partition plate. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0030] 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.

[0031] 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 pipeline during transport easily generate dust and debris. Furthermore, the presence of bends in the transport pipeline makes it prone to fuel sphere jamming and accumulation.

[0032] 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 transmission pipelines, affecting the continuous and stable operation of the high-temperature gas-cooled reactor fuel loading and unloading system.

[0033] The following detailed description of the overall structure, working principle, and technical effects of the high-temperature gas-cooled reactor fuel ball delivery pipeline blowing and de-jamming device provided by the present invention, through embodiments and in conjunction with the accompanying drawings, illustrates these features.

[0034] Please refer to Figures 1-3 This invention provides a puffing and 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 delivery pipeline, improving the current problem of no effective unblocking means and inconvenience in unblocking delivery pipelines, and ensuring the continuous and stable operation of high-temperature gas-cooled reactors.

[0035] Please refer to Figures 1-3 The present invention provides a high-temperature gas-cooled reactor fuel ball delivery pipeline blowing and unblocking device, comprising a blowing and suction functional block 100 and a connecting block 200. The blowing and suction functional block 100 has a first end and a second end. An end plate 110 is provided at the first end of the blowing and suction functional block 100, which is used to fit against the spherical surface of the fuel ball when the unblocking device is working. An air intake channel 120 is provided within the blowing and suction functional block 100, penetrating both the first and second ends. An air blowing channel 130 is also provided within the blowing and suction functional block 100, penetrating the second end. The end plate 110 blocks the air blowing channel 130 in the first section, and has several air blowing ports 111 communicating with the air blowing channel 130. The connecting block 200 is detachably disposed at the second end of the blowing and suction functional block 100, and has a first through hole 210 communicating with the air intake channel 120 and a second through hole 220 communicating with the air blowing channel 130. It should be noted that the first through hole 210 and the second through hole 220 are independent of each other and do not form a connection. The first through hole 210 is connected to the external intake air source, and the second through hole 220 is connected to the external blowing air source.

[0036] When a fuel ball delivery pipeline becomes blocked, the unblocking device is sent along the pipeline to the blockage location, so that the end plate 110 at the first end of the blow-suction functional block 100 comes into contact with the blocked fuel ball. First, an external suction air source attempts to adsorb the fuel ball through the suction channel 120. If the fuel ball is adsorbed and moved, the unblocking device is driven to move and remove the adsorbed fuel ball. If the fuel ball cannot be adsorbed, an external blowing air source blows air through the blowing channel 130 onto the blocked fuel ball, impacting it and loosening it. Then, the blow-suction functional block 100 adsorbs and removes the fuel ball. The unblocking device provided by this invention has both blowing and suction functions to facilitate the unblocking of fuel balls and the removal of the fuel balls from the delivery pipeline.

[0037] Please refer to Figure 1 and Figure 2In some optional embodiments, in order to observe the situation inside the conveying pipeline in real time, and to observe the operation process during unblocking and ball retrieval, so as to achieve precise operation, shorten the unblocking time, and improve the unblocking efficiency, the unblocking device provided by the present invention also includes a camera 300. Specifically, a mounting block 310 connected to the end plate 110 is provided in the air intake channel 120. The mounting block 310 is arranged along the axial direction of the blowing and suction functional block 100. The mounting block 310 has a mounting hole for mounting the camera 300, and the lens of the camera 300 faces the first end. Further, the camera 300 is a small-diameter cylinder to facilitate installation into the mounting hole. In order to adapt to the high temperature and strong radiation environment inside the fuel ball conveying pipeline, the camera 300 adopts a high temperature resistant and radiation-proof high-definition camera 300. The camera 300 can withstand a high temperature of 200℃ and a high temperature of 10℃. 5 Gy radiation.

[0038] Please refer to Figure 1 and Figure 2 In order to facilitate the smooth entry and exit of the unblocking device into and out of the fuel ball conveying pipeline, in this embodiment, both the blowing and suction functional block 100 and the connecting block 200 are cylindrical structures, and the maximum diameter of both the blowing and suction functional block 100 and the connecting block 200 is less than 60mm, the total length of both is less than 150mm, and the surfaces of both the blowing and suction functional block 100 and the connecting block 200 are smooth.

[0039] Please refer to Figure 1 and Figure 2 In some optional embodiments, to improve the adhesion between the end plate 110 and the fuel ball, thereby effectively adsorbing the fuel ball, the end plate 110 is a spherical arc surface concave towards the second end, and the curvature of the spherical arc surface is adapted to the outer diameter of the fuel ball. In this embodiment, when the outer diameter of the fuel ball is 60mm, the radius of the spherical arc surface is 30mm±0.2mm, ensuring that the contact area between the adsorption surface and the surface of the fuel ball is ≥90%, avoiding air leakage when adsorbing the fuel ball. Furthermore, a high-temperature resistant material layer is coated on the surface of the end plate 110 to prevent the end plate 110 from softening or deforming due to contact with the high-temperature fuel ball. The hardness of the high-temperature resistant material layer is less than the hardness of the fuel ball, preventing the fuel ball from being crushed due to collision when the end plate 110 comes into contact with it, thus preventing fuel ball fragments from further aggravating pipeline blockage.

[0040] Please refer to Figures 1-3In some optional embodiments, the intake channel 120 is located at the axis of the blow-suction functional block 100, while the blowing channel 130 is located around the intake channel 120. Correspondingly, the end plate 110 is also arranged in a ring at the first end of the blow-suction functional block 100. A plurality of blowing ports 111 are equally spaced along a circular trajectory on the end plate 110. In this embodiment, 16 blowing ports 111 are equally spaced on the end plate 110. Further, since the end plate 110 is a spherical arc surface, there is an angle of 15° between the axis of the blowing port 111 and the axis of the blow-suction functional block 100. This causes the air outlet directions of the plurality of blowing ports 111 to converge on the front axis of the blow-suction functional block 100. When the fuel ball is blown out of the blockage, the plurality of blowing ports 111 blow air towards the fuel ball simultaneously from the ring direction, thereby improving the effect of impacting and unblocking the fuel ball. Furthermore, the inner wall of the air outlet 111 is chamfered at 0.5mm*45° to prevent vortices from forming in the air outlet 111 when the airflow impacts, thereby improving the air blowing efficiency.

[0041] Please refer to Figure 3 In some optional embodiments, the card release device further includes a partition 400, which is a tubular structure. The partition 400 is arranged around the blow-suction functional block 100 and connected to the end plate 110. The partition 400 divides the interior of the blow-suction functional block 100 into a blowing channel and a suction channel 120. The suction channel 120 is located inside the partition 400, and the blowing channel 130 is located between the inner wall of the blow-suction functional block 100 and the partition 400. Furthermore, when the connecting block 200 is located at the second end, the connecting block 200 abuts against the partition 400. Further, to facilitate the detachable connection of the connecting block 200 to the blow-suction functional block 100, combined with... Figure 1 In this embodiment, a first stepped surface 230 is provided at one end of the connecting block 200, and a second stepped surface 140 is provided on the inner wall of the second end of the blowing and suction functional block 100. The first stepped surface 230 and the second stepped surface 140 are adapted to each other. Through the cooperation of the first stepped surface 230 and the second stepped surface 140, it is easy to snap the connecting block 200 and the blowing and suction functional block 100 together. Furthermore, when the connecting block 200 is inserted into the blowing and suction functional block 100, the end face of the connecting block 200 abuts against the partition 400, thereby separating the blowing channel 130 and the suction channel 120 and avoiding interference.

[0042] In summary, the implementation principle of the high-temperature gas-cooled reactor fuel ball delivery pipeline blow-suction unblocking device provided by the present invention is as follows: When the fuel ball delivery pipeline is blocked, the unblocking device is sent along the pipeline to the blockage position, so that the end plate 110 of the first end of the blow-suction functional block 100 is in contact with the blocked fuel ball. First, an external air source is used to try to adsorb the fuel ball through the air intake channel 120. If the fuel ball can be adsorbed and moved, the unblocking device is driven to move to remove the adsorbed fuel ball. If the fuel ball cannot be adsorbed, an external air source blows air through the air blowing channel 130 to the blocked fuel ball, impacting the blocked fuel ball and loosening it. Then, the blow-suction functional block 100 adsorbs and removes the fuel ball. The unblocking device provided by the present invention has both blowing and suction functions to facilitate the unblocking of the fuel ball and the removal of the fuel ball from the delivery pipeline.

[0043] 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 purge and de-jamming device for a fuel sphere delivery pipeline in a high-temperature gas-cooled reactor, characterized in that, include: The blowing and suction function block has a first end and a second end opposite to each other. The first end is provided with an end plate for fitting with the spherical surface of the fuel ball. The blowing and suction function block has an air intake channel that passes through the first end and the second end. The blowing and suction function block also has an air blowing channel that passes through the second end. The end plate has a plurality of air blowing ports that communicate with the air blowing channels. A connecting block is detachably disposed at the second end of the blowing and suction function block. The connecting block has a first through hole communicating with the suction channel and a second through hole communicating with the blowing channel. The first through hole is connected to an external suction air source, and the second through hole is connected to an external blowing air source. The card release device further includes a partition plate, which is arranged around the blow-suction functional block and connected to the end plate. The partition plate is used to separate the interior of the blow-suction functional block so that the suction channel is located inside the partition plate and the blowing channel is located between the inner wall of the blow-suction functional block and the partition plate. When the connecting block is arranged at the second end, the connecting block abuts against the partition plate.

2. The high-temperature gas-cooled reactor fuel sphere delivery pipeline blowing and unblocking device according to claim 1, characterized in that, The card unlocking device also includes a camera. The air intake channel is provided with a mounting block connected to the end plate. The mounting block has a mounting hole for mounting the camera, and the lens of the camera faces the first end.

3. The high-temperature gas-cooled reactor fuel sphere delivery pipeline blow-suction-unblocking device according to claim 1, characterized in that, Both the blowing and suction functional block and the connecting block are cylindrical.

4. The high-temperature gas-cooled reactor fuel sphere delivery pipeline blowing and unblocking device according to claim 3, characterized in that, The air intake channel is located at the axis of the air blowing and suction functional block, and the air blowing channel is located around the outside of the air intake channel.

5. The high-temperature gas-cooled reactor fuel sphere delivery pipeline blow-suction-unblocking device according to claim 1, characterized in that, The end plate is a spherical arc surface that is concave towards the second end, for fitting with the fuel ball.

6. The high-temperature gas-cooled reactor fuel sphere delivery pipeline blow-suction-unblocking device according to claim 5, characterized in that, The end plate surface is covered with a high-temperature resistant material layer, the hardness of which is less than that of the fuel ball.

7. The high-temperature gas-cooled reactor fuel sphere delivery pipeline blow-suction-unblocking device according to claim 1, characterized in that, Several of the air inlets are equally spaced along a circular trajectory on the end plate.

8. The high-temperature gas-cooled reactor fuel sphere delivery pipeline blow-suction-unblocking device according to claim 1, characterized in that, The axis of the air inlet is at an angle of 15° to the axis of the air blowing and suction functional block.

9. The high-temperature gas-cooled reactor fuel sphere delivery pipeline blow-suction-unblocking device according to claim 1, characterized in that, One end of the connecting block has a first stepped surface, and the second end of the blowing and suction functional block has a second stepped surface that matches the first stepped surface.

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