Plasma unit structure for divertor and welding method thereof

Abstract

The invention relates to the technical field of divertors, and discloses a plasma unit structure for a divertor and a welding method of the plasma unit structure. The supporting base is used for fixing the plasma unit, the supporting base comprises a second cooling pipe, the second cooling pipe is arranged at one end of the supporting base, and the second cooling pipe extends in the direction of the plasma unit; the plasma unit is arranged above the supporting base and comprises a main pipe body, a first cooling pipe and a water box body, one end of the first cooling pipe is connected with the main pipe body, the other end of the first cooling pipe is connected with the water box body, the water box body comprises a lower cover plate and a side cover plate, and a first through hole is formed in the top end of the water box body and used for being connected with the first cooling pipe; a second through hole is formed in the end, close to the supporting base, of the water box body, the lower cover plate is arranged at the end, away from the first through hole, of the water box body, and the side cover plate is arranged at the end, away from the second through hole, of the water box body.

Description

Technical Field

[0001] The invention relates to the technical field of divertor of a tokamak fusion device, and in particular to a plasma unit structure for a divertor and a welding method thereof. Background Art

[0002] As one of the core internal components of the magnetic confinement tokamak fusion device, the divertor has the main function of removing heat flow and particle flow from the core plasma to ensure the normal operation of the device. The divertor plasma unit intersects with the scraping layer and bears the maximum steady-state heat load on the surface of the internal components. Therefore, the usual practice is to support the base to provide coolant to the plasma unit, cool it and take away the heat, so that the maximum temperature of each component material is within the allowable temperature range.

[0003] The divertor is composed of an inner target plate, a dome, an outer target plate and a box body, and the inner target plate, the dome and the outer target plate are composed of multiple plasma units and a support base. In the prior art, the plasma unit mostly adopts a flat plate structure and a through-tube structure. The general processing method of the flat plate structure is to use brazing to fix the tungsten copper block to the composite plate formed by explosion welding of chromium zirconium copper and stainless steel; the through-tube structure is usually to fix pure copper to the tungsten block by casting, and then use hot isostatic pressing welding and chromium zirconium copper to connect. No matter which structure is used, the pipeline needs to be connected to the support base at the back, and the gap between the pipelines is only about 15-30mm. The support base and the plasma unit are connected together by pins after being processed separately, and the pipeline between them is finally welded. This has the problem of welding in a small space. The welding gun cannot surround the pipeline for a week, and the pipeline welding is difficult. Summary of the invention

[0004] The technical problem to be solved by the present invention is that in the prior art, it is difficult to weld the divertor plasma unit and the supporting base in a narrow space.

[0005] In order to solve the above technical problems, the present invention provides a plasma unit structure for a divertor, which includes a support base and a plasma unit; the support base is used to fix the plasma unit, the support base includes a second cooling pipe, the second cooling pipe is arranged at one end of the support base, and the second cooling pipe extends in the direction of the plasma unit; the plasma unit is arranged above the support base, the plasma unit includes a main pipe, a first cooling pipe and a water box body, one end of the first cooling pipe is connected to the main pipe, and the other end is connected to the water box body, the water box body includes a lower cover plate and a side cover plate, the top of the water box body is provided with a first through hole for connecting the first cooling pipe, the end of the water box body close to the support base is provided with a second through hole for connecting the second cooling pipe, the lower cover plate is arranged at one end of the water box body away from the first through hole, and the side cover plate is arranged at one end of the water box body away from the second through hole.

[0006] In one embodiment, the main body further includes two support parts, which are arranged below the main body and spaced apart along the length direction of the main body, and each support part is provided with a support hole.

[0007] In one embodiment, a plurality of fasteners are staggeredly arranged at one end of the support base away from the plasma unit along the width direction of the support base, and the fasteners are arranged in one-to-one correspondence with the plasma units.

[0008] In one embodiment, each fastener includes two fixing parts, which are spaced apart along the length direction of the main pipe body, and the spacing distance between the two fixing parts is the same as the distance between the two supporting parts, and each fixing part is provided with a corresponding hole.

[0009] In one embodiment, the fastener further includes a pin member, the pin member passes through the supporting hole and the corresponding hole along the width direction of the main pipe body, and the pin member is used to connect the fixing portion and the supporting portion.

[0010] In one embodiment, there are multiple second cooling tubes, and the multiple second cooling tubes are arranged at intervals along the width direction of the main tube body, and the horizontal heights of two adjacent second cooling tubes are different.

[0011] In one embodiment, there are multiple plasma units, and the multiple plasma units are arranged at intervals along the width direction of the support base. The tube body length of the first cooling tube in each plasma unit is different, and the horizontal heights of two adjacent first through holes are different. The first through holes and the second cooling tubes are arranged one by one.

[0012] Another aspect of the present invention further provides a welding method for welding the above-mentioned plasma unit structure for a divertor, which comprises the following steps:

[0013] S1, welding and fixing the main body and the first cooling tube in the plasma unit;

[0014] S2, welding and fixing the water box body and the first cooling pipe, after the water box body and the first cooling pipe are fixed, welding the lower cover plate to the water box body;

[0015] S3. After the lower cover plate is welded and fixed, the plasma unit is installed on the support base, and the position of the water box body is adjusted so that the second cooling pipe on the support base is connected to the second through hole on the water box body, and at the same time, the support part on the plasma unit is arranged in a fit with the fixing part on the support base;

[0016] S4. Insert the pins into the supporting part and the fixing part, weld the water box body and the second cooling pipe on the front, and weld the side cover plate to the water box body.

[0017] Compared with the prior art, the plasma unit structure and welding method for the divertor of the embodiment of the present invention have the following beneficial effects: 1) the support base, as the supporting foundation of the whole structure, is responsible for fixing and supporting the plasma unit, and includes a second cooling pipe, which extends from one end of the support base and faces the direction of the plasma unit, so as to facilitate the connection of the plasma unit; 2) the plasma unit, the plasma unit includes a main body, a first cooling pipe and a water box body, a decomposed water box body is used in the plasma unit, and the first cooling pipe is welded through the first through hole on the water box body, and the lower cover plate is further welded, and then the plasma unit with the water box body is connected to the support base, and the second through hole on the water box body is connected to the second cooling pipe on the support base by adjusting the position of the plasma unit, and the second through hole and the second cooling pipe are welded, and then the side cover plate on the water box body is welded. This scheme can effectively solve the welding problem of pipeline connection in a narrow space in the divertor of the fusion device, and has the advantages of safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the embodiment of the present invention before installation.

[0019] Figure 2 Schematic diagram of the plasma unit structure according to an embodiment of the present invention.

[0020] Figure 3 A schematic diagram of the structure of an embodiment of the present invention after installation.

[0021] In the figure, 1, support base; 11, second cooling pipe; 12, fastener; 121, fixing part; 122, pin member; 2, plasma unit; 21, main body; 211, support part; 22, first cooling pipe; 23, water box body; 231, lower cover plate; 232, side cover plate; 233, first through hole; 234, second through hole. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the present invention, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present invention, it should be understood that the terms "first" and "second" are used in the present invention for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0026] like Figures 1 to 3 As shown, an embodiment of the present invention preferably provides a divertor plasma unit 2 pipeline connection structure, which includes a support base 1 and a plasma unit 2; the support base 1 is used to fix the plasma unit 2, and the support base 1 includes a second cooling pipe 11, the second cooling pipe 11 is arranged at one end of the support base 1, and the second cooling pipe 11 extends toward the plasma unit 2; the plasma unit 2 is arranged above the support base 1, and the plasma unit 2 includes a main body 21, a first cooling pipe 22 and a water box body 23, the first cooling pipe 22 is used to fix the plasma unit 2, and the second cooling pipe 11 is used to fix the plasma unit 2, and the second cooling pipe 11 is used to fix the plasma unit 2; the plasma unit 2 ... One end of the cooling pipe 22 is connected to the main pipe body 21, and the other end is connected to the water box body 23. The water box body 23 includes a lower cover plate 231 and a side cover plate 232. A first through hole 233 is provided at the top of the water box body 23 for connecting the first cooling pipe 22. A second through hole 234 is provided at one end of the water box body 23 close to the support base 1 for connecting the second cooling pipe 11. The lower cover plate 231 is provided at one end of the water box body 23 away from the first through hole 233, and the side cover plate 232 is provided at one end of the water box body 23 away from the second through hole 234.

[0027] Based on the above technical features, through the setting of the support base 1, as the supporting foundation of the entire structure, the plasma unit 2 is fixed and supported, which includes a second cooling pipe 11, which extends from one end of the support base 1 and faces the direction of the plasma unit 2, so as to facilitate the connection of the plasma unit; through the setting of the plasma unit 2, the plasma unit 2 includes a main body 21, a first cooling pipe 22 and a water box body 23, and a decomposed water box body 23 is used in the plasma unit 2, and the first cooling pipe 22 is welded through the first through hole 233 on the water box body 23, and the lower cover plate 231 is further welded, and then the plasma unit 2 with the water box body 23 is connected to the support base 1, and the second through hole 234 on the water box body 23 is connected to the second cooling pipe 11 on the support base 1 by adjusting the position of the plasma unit 2, and the second through hole 234 and the second cooling pipe 11 are welded, and then the side cover plate 232 on the water box body 23 is welded.

[0028] As some embodiments of the present invention, Figure 2 As shown, the main body 21 further includes two support portions 211, which are arranged below the main body 21, and the two support portions 211 are arranged at intervals along the length direction of the main body 21, and each support portion 211 is provided with a support hole. The plasma unit 2 further enhances the stability of the structure and the flexibility of installation by adding two support portions 211 and the support holes thereon, while maintaining efficient heat exchange performance. This design makes the structure more suitable for various plasma applications that need to withstand high heat loads.

[0029] As some embodiments of the present invention, Figure 1 As shown, a plurality of fasteners 12 are staggeredly arranged along the width direction of the support base 1 at one end of the support base 1 away from the plasma unit 2, and the fasteners 12 are arranged one by one corresponding to the plasma unit 2. The plasma unit 2 and the support base 1 are firmly connected together by a plurality of staggered fasteners 12, further enhancing the stability of the entire structure. At the same time, since the fasteners 12 are staggered, it is easier to achieve accurate assembly and alignment of the plasma unit 2 and the support base 1.

[0030] As some embodiments of the present invention, Figure 1As shown, each fastener 12 includes two fixing portions 121, which are arranged at intervals along the length direction of the main body 21, and the interval distance between the two fixing portions 121 is the same as the distance between the two supporting portions 211, and a corresponding hole is opened on each fixing portion 121. Through the arrangement of the fixing portions 121, since the interval distance between the two fixing portions 121 is the same as the distance between the two supporting portions 211, a close fit and a stable connection between the fastener 12 and the supporting portion 211 can be ensured. This connection method not only provides good mechanical strength, but also helps to prevent deformation or damage caused by thermal load and mechanical stress.

[0031] As some embodiments of the present invention, Figure 1 As shown, the fastener 12 also includes a pin 122, which passes through the support hole and the corresponding hole along the width direction of the main body 21, and the pin 122 is used to connect the fixing portion 121 and the supporting portion 211. Through the setting of the pin 122, the pin 122 is a metal member of a cylindrical or other shape, and its diameter is slightly smaller than the diameter of the supporting hole and the corresponding hole, so that it can easily pass through these holes. During the installation process, first align the two fixing portions 121 of the fastener 12 with the corresponding supporting portions 211 on the plasma unit 2. Then, the pin 122 passes through the supporting hole and the corresponding hole along the width direction of the main body 21 until it completely passes through and fixes the fixing portion 121 and the supporting portion 211. By adding the pin 122 and matching it with the fixing portion 121 and the supporting portion 211, this fastener 12 structure not only provides a stable connection and enhanced stability, but also makes the assembly and maintenance process simpler and more convenient.

[0032] As some embodiments of the present invention, Figure 3 As shown, the number of the second cooling tubes 11 is multiple, and the multiple second cooling tubes 11 are spaced apart along the width direction of the main body 21, and the horizontal heights of two adjacent second cooling tubes 11 are different. Through the arrangement of multiple cooling tubes, since the horizontal heights of two adjacent second cooling tubes 11 are different, they can more effectively exchange heat with the surrounding environment. This staggered arrangement increases the heat exchange area, so that heat can be taken away faster. At the same time, this staggered arrangement of the second cooling tubes 11 effectively ensures that more plasma units 2 are installed in a limited space, thereby improving the space utilization of the overall structure.

[0033] As some embodiments of the present invention, Figure 3As shown, the number of plasma units 2 is multiple, and the multiple plasma units 2 are spaced along the width direction of the support base 1, and the tube length of the first cooling tube 22 in each plasma unit 2 is different, and the horizontal heights of the two adjacent first through holes 233 are not the same, and the first through hole 233 is arranged one by one with the second cooling tube 11. Through the setting of multiple plasma units 2. Through the setting of multiple plasma units 2, since the lengths of the first cooling tubes 22 in the two adjacent plasma units 2 are different, and the horizontal heights of the two adjacent first through holes 233 are also different, this design can more effectively transfer heat from the plasma to the cooling system. By adjusting the length of the first cooling tube 22 and the height of the first through hole 233, each first through hole 233 is arranged one by one with the staggered second cooling tube 11, further reducing the space utilization of the present structure. At the same time, the spacing of multiple plasma units 2 and the different lengths of the cooling tubes help to disperse stress and enhance the stability of the entire cooling structure.

[0034] The present invention also provides a welding method for welding the above-mentioned plasma unit structure for a divertor, the steps of which include:

[0035] S1. Weld and fix the main body 21 and the first cooling tube 22 in the plasma unit 2. When adjusting the length of the first cooling tube 22, the layout of the second cooling tube 11 needs to be fully considered to ensure the feasibility and reliability of the cooling system.

[0036] S2, the water box body 23 and the first cooling pipe 22 are welded and fixed. After the water box body 23 and the first cooling pipe 22 are fixed, the lower cover plate 231 is welded to the water box body 23.

[0037] S3. After the lower cover plate 231 is welded and fixed, the plasma unit 2 is installed on the support base 1, and the position of the water box body 23 is adjusted so that the second cooling pipe 11 on the support base 1 is connected to the second through hole 234 on the water box body 23. At the same time, the support part 211 on the plasma unit 2 is arranged in a fit with the fixing part 121 on the support base 1.

[0038] S4, insert the pin member into the supporting part 211 and the fixing part 121, weld the water box body 23 and the second cooling pipe 11 on the front side, and weld the side cover plate 232 to the water box body 23.

[0039] In summary, the embodiment of the present invention provides a divertor plasma unit 2 pipeline connection structure and a welding method thereof, which have the following beneficial effects compared with the prior art: 1) the support base 1 serves as the supporting base of the entire structure, is responsible for fixing and supporting the plasma unit 2, and includes a second cooling pipe 11, which extends from one end of the support base 1 and faces the direction of the plasma unit 2 so as to be connected with the plasma unit; 2) the plasma unit 2, the plasma unit 2 includes a main body 21, a first cooling pipe 22 and a water box body 23, a decomposed water box body 23 is used in the plasma unit 2, and the first cooling pipe 22 is welded through the first through hole 233 on the water box body 23, and the lower cover plate 231 is further welded, and then the plasma unit 2 with the water box body 23 is connected to the support base 1, and the second through hole 234 on the water box body 23 is connected to the second cooling pipe 11 on the support base 1 by adjusting the position of the plasma unit 2, and the second through hole 234 and the second cooling pipe 11 are welded, and then the side cover plate 232 on the water box body 23 is welded. This solution can effectively solve the welding problem of pipe connections in the narrow space of the divertor of a fusion device, and has the advantages of safety and reliability.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A plasma unit structure for a divertor, characterized in that: including a support base and a plasma unit; The support base is used to fix the plasma unit, and the support base includes a second cooling pipe, which is arranged at one end of the support base and extends toward the plasma unit; The plasma unit is arranged above the support base, and the plasma unit includes a main pipe, a first cooling pipe and a water box body, one end of the first cooling pipe is connected to the main pipe, and the other end is connected to the water box body, the water box body includes a lower cover plate and a side cover plate, the top of the water box body is provided with a first through hole for connecting the first cooling pipe, the end of the water box body close to the support base is provided with a second through hole for connecting the second cooling pipe, the lower cover plate is provided at one end of the water box body away from the first through hole, and the side cover plate is provided at one end of the water box body away from the second through hole.

2. The plasma unit structure for divertor according to claim 1, characterized in that: The main body further comprises two supporting parts, which are arranged below the main body and spaced apart along the length direction of the main body, and each supporting part is provided with a supporting hole.

3. The plasma unit structure for divertor according to claim 2, characterized in that: A plurality of fasteners are staggeredly arranged at one end of the support base away from the plasma unit along the width direction of the support base, and the fasteners are arranged in one-to-one correspondence with the plasma units.

4. The plasma unit structure for divertor according to claim 3, characterized in that: Each of the fasteners comprises two fixing parts, the two fixing parts are arranged at intervals along the length direction of the main pipe body, and the interval distance between the two fixing parts is the same as the distance between the two supporting parts, and each of the fixing parts is provided with a corresponding hole.

5. The plasma unit structure for divertor according to claim 4, characterized in that: Each of the fasteners further includes a pin member, the pin member passes through the supporting hole and the corresponding hole along the width direction of the main pipe body, and the pin member is used to connect the fixing portion and the supporting portion.

6. The plasma unit structure for divertor according to claim 1, characterized in that: There are multiple second cooling tubes, and the multiple second cooling tubes are arranged at intervals along the width direction of the main tube body, and the horizontal heights of two adjacent second cooling tubes are different.

7. The plasma unit structure for divertor according to claim 1, characterized in that: There are multiple plasma units, and the multiple plasma units are arranged at intervals along the width direction of the support base. The tube body length of the first cooling tube in each plasma unit is different, and the horizontal heights of two adjacent first through holes are different. The first through holes and the second cooling tubes are arranged in a one-to-one correspondence.

8. A welding method, characterized in that: A plasma unit structure for a divertor according to any one of claims 1 to 7, comprising: S1, welding and fixing the main pipe and the first cooling pipe in the plasma unit; S2, welding and fixing the water box body and the first cooling pipe, and after the water box body and the first cooling pipe are fixed, welding the lower cover plate to the water box body; S3, after the lower cover plate is welded and fixed, the plasma unit is installed on the support base, and the position of the water box body is adjusted so that the second cooling pipe on the support base is connected to the second through hole on the water box body, and at the same time, the support part on the plasma unit is arranged in close contact with the fixing part on the support base; S4. Insert the pin member into the supporting part and the fixing part, weld the water box body and the second cooling pipe on the front side, and weld the side cover plate to the water box body.

Images