Electron beam welding device and method for cavity of high-frequency cavity of proton cyclotron

Abstract

The invention relates to the field of cyclotrons, and discloses a cavity electron beam welding device and method for a high-frequency cavity of a proton cyclotron, and the device comprises a base which comprises a switching part and two fan-shaped parts; each limiting mechanism comprises a first component, a second component, a third component and a fourth component, the fourth component, the third component, the second component and the two first components jointly define a first limiting space, and the two limiting mechanisms jointly define a second limiting space; a third limiting space is formed between the first supporting part and the second part; a fourth limiting space is formed between the second supporting component and the second component; a third support member selectively disposed on an upper side of the second support member; the fourth supporting part is located in the second limiting space, and the lateral limiting piece is arranged on the other side, close to the switching part, of the fan-shaped part. The number of welding tools and the welding frequency can be reduced, and the welding efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cyclotrons, and in particular to an electron beam welding device and a welding method for the cavity of a high-frequency cavity of a proton cyclotron. Background Art

[0002] Currently, proton therapy is one of the important frontier research directions in the field of medical physics. As an important device for proton therapy, the proton cyclotron plays a key role in clinical applications. Among them, the high-frequency cavity is one of the core components of the proton cyclotron, and its processing and manufacturing quality directly affects the overall performance and stability of the device. Therefore, the precision manufacturing of the high-frequency cavity is particularly crucial. When the proton cyclotron uses an electron beam welding tooling for welding, multiple sets of welding toolings are required to fix and weld multiple workpieces separately, with low flexibility. When changing products, a new corresponding tooling needs to be designed, resulting in a long changeover time during small-batch and multi-variety production, increasing the time cost. Moreover, the structure of the welding tooling will also block the electron beam path or interfere with the movement of the electron beam gun head. When welding one workpiece, it needs to be taken out of the vacuum chamber multiple times, re-positioned and fixed, and then the next welding sequence is carried out. The vacuum pumping and venting time takes about one to several hours, and each time it is installed and fixed to the welding position, it also needs to be repeatedly aligned and positioned, resulting in relatively low work efficiency. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide an electron beam welding device for the cavity of a high-frequency cavity of a proton cyclotron, which can reduce the number of welding toolings and the number of welding times, and improve the welding efficiency.

[0004] The present invention also aims to provide an electron beam welding method for the cavity of a high-frequency cavity of a proton cyclotron to apply the above-mentioned electron beam welding device for the cavity of a high-frequency cavity of a proton cyclotron.

[0005] According to an embodiment of the present invention, the cavity electron beam welding device of the high-frequency cavity of a proton cyclotron includes: a base, a limiting mechanism, a first supporting component, a second supporting component, a third supporting component and a lateral limiting member. The base includes a transition portion and two fan-shaped portions, and the two fan-shaped portions are connected by the transition portion; the two fan-shaped portions are provided with the limiting mechanism, and the limiting mechanism includes a first component, a second component, a third component and a fourth component, the first component is two and is arranged on both sides of the arc length direction of the fan-shaped portion, the second component is arranged on the side of the fan-shaped portion away from the transition portion, the third component and the fourth component are located on the upper side of the second component and are detachably connected to the second component, the fourth component is arranged close to the transition portion relative to the third component, and partially extends to the upper side of the transition portion, the fourth component, the third component, the second component and the two first components jointly define a first limiting space; the limiting mechanisms of the two fan-shaped portions jointly define a second limiting space. space; the first support component is located in the first limiting space and is detachably provided on at least one of the fan-shaped parts, and a third limiting space is formed between the first support component and the second component; the second support component is located in the first limiting space and is detachably provided on one of the fan-shaped parts, and a fourth limiting space is formed between the second support component and the second component, and the height of the second support component is less than the height of the first support component; the third support component can be selectively arranged on the upper side of the second support component; the fourth support component is located in the second limiting space and is provided on the transition part; the lateral limiting member and the second support component are provided on the same fan-shaped part, and are provided on the other side of the fan-shaped part close to the transition part, and the lateral limiting member is detachably connected to the fan-shaped part.

[0006] According to the cavity electron beam welding device of the high-frequency cavity of the proton cyclotron according to the embodiment of the present invention, the precise assembly and positioning of the multiple components of the lower cavity can be achieved through the limiting assembly, the first supporting component, the second supporting component, the third supporting component, the fourth supporting component and the lateral limiting component, as well as the precise assembly and positioning of the inner conductor and the lower cavity, which is conducive to reducing the number of welding tools and reducing human operation errors. In addition, the positioning of the inner conductor and the lower cavity by the above device is more accurate, which can reduce the risk of welding deformation during welding and improve the welding quality and the performance stability of the finished welded product. The above device can also reduce the assembly steps and the number of times of entering the vacuum chamber, and can achieve one-time welding of multiple welds in the vacuum chamber, which can improve welding efficiency, and can also be used as a post-welding shape-preserving tool, with better applicability.

[0007] In some embodiments of the present invention, the first component includes a plurality of first limiting members, and the plurality of first limiting members are arranged at intervals along the radial direction of the fan-shaped portion; the first limiting member includes a fixing portion and a clamping portion, the fixing portion is arranged on the fan-shaped portion, a clamping groove is provided between the clamping portion and the fixing portion, the clamping groove is open toward one side of the first limiting space, and the clamping portion is movably arranged on the fixing portion along the vertical direction; wherein the clamping portion of at least one of the first limiting members is protruding relative to the fixing portion toward the side close to the center of the fan-shaped portion.

[0008] In some embodiments of the present invention, the first component includes a second limiting member, and the second limiting member is provided on the transition portion and is used to form the second limiting space.

[0009] In some embodiments of the present invention, the second component includes a plurality of adjustable limit members, which are arranged at intervals along the arc length direction, and the adjustable limit members are movably arranged on the fan-shaped portion along the radial direction of the fan-shaped portion. A contoured positioning plate is provided on one side of the adjustable limit member close to the first limit space, and the contoured positioning plate extends along the arc length direction of the fan-shaped portion.

[0010] In some embodiments of the present invention, the second component includes a fixed limiter, the fixed limiter is centrally arranged on the fan-shaped portion, and the plurality of adjustable limiters are arranged on both sides of the fixed limiter along the arc length direction.

[0011] In some embodiments of the present invention, the third component is in the shape of an arc-shaped strip extending along the arc length direction, and the radius of the third component is greater than the radius of the sector portion.

[0012] In some embodiments of the present invention, the fourth component includes a middle section and a bending section, the middle section is arc-shaped and is located on the upper side of the first supporting component or the second supporting part, the bending section is arranged at both ends of the length direction of the middle section and is bent relative to the middle section, and the bending section is located on the upper side of the transition part.

[0013] In some embodiments of the present invention, the first supporting component includes a plurality of first plates, which are spaced apart along the arc length direction; the second supporting component includes a plurality of second plates, which are spaced apart along the arc length direction.

[0014] In some embodiments of the present invention, the cavity electron beam welding device of the high-frequency cavity of a proton cyclotron accelerator also includes a rotating mechanism, which includes a first rotating part and a second rotating part, the first rotating part is connected to the second rotating part and drives the second rotating part to rotate around a first direction, the second rotating part is connected to the adapter part and drives the adapter part to rotate around a second direction, and the second direction is perpendicular to the first direction.

[0015] A cavity electron beam welding method for a proton cyclotron high-frequency cavity according to an embodiment of the present invention comprises a cavity electron beam welding device for a proton cyclotron high-frequency cavity according to any of the foregoing items; the proton cyclotron high-frequency cavity comprises a lower cavity and an inner conductor, the lower cavity comprises a bottom shell wall and two side shell walls, the bottom shell wall comprises two fan-shaped wall segments and a transition wall segment connecting the two fan-shaped wall segments, one end of each fan-shaped wall segment in a radial direction is open and formed with an opening, and the side shell wall covers the opening; the method comprises: fixing the fan-shaped wall segment, the transition wall segment, the side shell wall and the inner conductor by using the cavity electron beam welding device for the proton cyclotron high-frequency cavity; placing the cavity electron beam welding device for the proton cyclotron high-frequency cavity into a vacuum chamber, welding the fan-shaped wall segment and the side shell wall, and welding the side shell wall and the inner conductor.

[0016] According to the cavity electron beam welding method of the high-frequency cavity of a proton cyclotron accelerator according to the embodiment of the present invention, a sector wall segment, a transition wall segment, a side shell wall and an inner conductor are placed in a cavity electron beam welding device of the high-frequency cavity of a proton cyclotron accelerator, and the adjustable stopper and the first stopper are adjusted to fix the sector wall segment, the transition wall segment, the side shell wall and the inner conductor. Then, the cavity electron beam welding device of the high-frequency cavity of a proton cyclotron accelerator is placed in a vacuum chamber, and the sector wall segment and the transition wall segment are welded, and the sector wall segment and the side shell wall are welded, and the side shell wall and the inner conductor are welded. All welding can be completed at one time, avoiding entering the vacuum chamber again, reducing the number of tooling for welding the cavity electron beam of the high-frequency cavity of a proton cyclotron accelerator, improving the utilization rate of the tooling, and saving costs.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a schematic diagram of a part of the structure of the high-frequency cavity of the proton cyclotron accelerator in an embodiment of the present invention; Figure 2A schematic diagram of the three-dimensional structure of a cavity electron beam welding device for a proton cyclotron high-frequency cavity provided in some embodiments of the present invention; Figure 3 A top view of a cavity electron beam welding device of a proton cyclotron high-frequency cavity with a partial structure removed provided in some embodiments of the present invention; Figure 4 A schematic diagram of the structure of a cavity electron beam welding device of a proton cyclotron high-frequency cavity after being assembled with a lower cavity and an inner conductor provided in some embodiments of the present invention; Figure 5 for Figure 4 A local enlarged schematic diagram of location I; Figure 6 A cross-sectional view of a cavity electron beam welding device of a proton cyclotron high-frequency cavity after being assembled with a lower cavity and an inner conductor provided in some embodiments of the present invention; Figure 7 for Figure 2 A partial enlarged view of location II; Figure 8 for Figure 2 A partial enlarged view of location III; Figure 9 for Figure 2 A local enlarged view of IV; Figure 10 for Figure 2 A local enlarged view of the V part; Figure 11 A schematic diagram of the three-dimensional structure of a cavity electron beam welding device of a proton cyclotron high-frequency cavity after being assembled with a lower cavity and an inner conductor provided by other embodiments of the present invention; Figure 12 A process flow chart of a cavity electron beam welding method for a proton cyclotron high frequency cavity provided in some embodiments of the present invention Figure One ; Figure 13 A process flow chart of a cavity electron beam welding method for a proton cyclotron high frequency cavity provided in some embodiments of the present invention Figure Two ; Figure 14 A process flow chart of a cavity electron beam welding method for a proton cyclotron high frequency cavity provided in some embodiments of the present invention Figure Three .

[0019] Reference numerals: 100. Cavity electron beam welding device for high-frequency cavity of proton cyclotron; 10. base; 11. adapter; 11a. mounting shaft; 12. sector; 12a. inspection port; 121. second adjusting bolt; 20. Limiting mechanism; 20a. First limiting space; 20b. Second limiting space; 21. First component; 211. First limiting member; 211a. Clamping groove; 2111. Fixing portion; 21111. First adjusting bolt; 2112. Clamping portion; 21121. Connecting section; 21121a. First strip hole; 21122. Clamping section; 212. Second limiting member; 22. Second component; 221. Adjustable limiting member; 2211. First portion; 2211a. Second strip hole; 2212. Second portion; 2212a. Avoiding groove; 222. Fixed limiting member; 223. Profiling positioning plate; 23. Third component; 24. Fourth component; 241. Middle section; 242. Bending section; 30. first supporting member; 30a. third limiting space; 31. first plate; 40. second supporting member; 40a. fourth limiting space; 41. second plate; 50. A third supporting member; 60. lateral limiter; 61. positioning pin; 62. limiter block; 70. fourth supporting member; 80. Rotating mechanism; 81. First rotating part; 82. Second rotating part; 200, high-frequency cavity of proton cyclotron; 210, lower cavity; 201, bottom shell wall; 2011, transition wall section; 2012, fan-shaped wall section; 20121, first flange; 202, side shell wall; 202a, notch; 2021, second flange; 220, inner conductor; 2201, first conductor part; 2202, second conductor part. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe features, without order or importance.

[0023] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] Reference is made below to Figures 1 - 9 describe the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity according to an embodiment of the present invention.

[0025] As Figure 1 shown, the proton cyclotron high-frequency cavity 200 may include a lower cavity 210, an inner conductor 220, and an upper cavity. The inner conductor 220 is provided on the lower cavity 210, and the upper cavity covers the lower cavity 210. The lower cavity 210 includes a bottom shell wall 201 and a side shell wall 202. The bottom shell wall 201 includes a transition wall section 2011 and a sector wall section 2012. There are two sector wall sections 2012, and the two sector wall sections 2012 are connected by the transition wall section 2011. One end in the radial direction of the sector wall section 2012 is open to form an opening, and the side shell wall 202 covers the opening and is welded to the sector wall section 2012. The inner conductor 220 includes a connected first conductor portion 2201 and a second conductor portion 2202. A notch 202a is provided in one of the side shell walls 202, and the second conductor portion 2202 is provided in the notch 202a and is welded to the side shell wall 202.

[0026] It can be understood that the above structure constitutes a compact proton cyclotron high-frequency cavity, and has a special-shaped structure and a thin-wall design feature. The material used is oxygen-free copper with excellent thermal and electrical conductivity. For the proton cyclotron high-frequency cavity 200 with such a structure, the conventional process is as follows: First, each component is processed with high precision, and then the electron beam welding technology is used for precise splicing in stages. This method requires a variety of welding toolings. For the welding of every two components, a set of tooling is required, and it needs to enter the vacuum chamber for welding once. The number of toolings required is relatively large, and the time-consuming for frequently entering the vacuum chamber is also relatively long. The total time required for welding the entire workpiece is relatively long, and the working efficiency is relatively low.

[0027] For the proton cyclotron high-frequency cavity 200 of the above structure, the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity of the embodiment of the present invention can be used for welding the components of the lower cavity 210 and welding the lower cavity 210 and the inner conductor 220 .

[0028] like Figures 2 to 3 As shown, the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity according to an embodiment of the present invention includes: a base 10, a limiting mechanism 20, a first supporting component 30, a second supporting component 40, a third supporting component 50, a fourth supporting component 70 and a lateral limiting member 60.

[0029] The base 10 includes an adapter 11 and two fan-shaped parts 12, and the two fan-shaped parts 12 are connected through the adapter 11. Both fan-shaped parts 12 are provided with a limiting mechanism 20, and the limiting mechanism 20 includes a first component 21, a second component 22, a third component 23 and a fourth component 24. The first components 21 are two and are arranged on both sides of the arc length direction of the fan-shaped part 12. The second component 22 is arranged on the side of the fan-shaped part 12 away from the adapter 11. The third component 23 and the fourth component 24 are located on the upper side of the second component 22 and are detachably connected to the second component 22. The fourth component 24 is arranged close to the adapter 11 relative to the third component 23 and partially extends to the upper side of the adapter 11. The fourth component 24, the third component 23, the second component 22 and the two first components 21 jointly define a first limiting space 20a; and the limiting mechanisms 20 of the two fan-shaped parts 12 jointly define a second limiting space 20b. The first support component 30 is located in the first limiting space 20a and is detachably arranged on at least one fan-shaped portion 12, and a third limiting space 30a is formed between the first support component 30 and the second component 22. The second support component 40 is located in the first limiting space 20a and is detachably arranged on a fan-shaped portion 12, and a fourth limiting space 40a is formed between the second support component 40 and the second component 22, and the height of the second support component 40 is less than the height of the first support component 30. The third support component 50 is selectively arranged on the upper side of the second support component 40. The fourth support component 70 is located in the second limiting space 20b and is arranged on the adapter portion 11. The lateral limiting member 60 is arranged on the same fan-shaped portion 12 as the second support component 40, and is arranged on the other side of the fan-shaped portion 12 close to the adapter portion 11, and the lateral limiting member 60 is detachably connected to the fan-shaped portion 12.

[0030] The base 10 may refer to a basic support structure of a cavity electron beam welding device 100 for a proton cyclotron high frequency cavity, and the outer contour of the base 10 and the proton cyclotron high frequency cavity 200 are similar. The base 10 may be, but is not limited to, alloy steel, stainless steel, aluminum alloy, composite material, and the like. In the above scheme, the base 10 may include an adapter 11 and two fan-shaped portions 12, and the two fan-shaped portions 12 are respectively arranged on both sides of the adapter 11. The adapter 11 may refer to a hollow circular structure, which may be used to connect the structure of the two fan-shaped portions 12, ensure that the two fan-shaped portions 12 are rigidly connected, improve the overall stability, and avoid displacement caused by vibration during welding. At the same time, the adapter 11 is hollow inside, which can greatly reduce the material consumption of the adapter 11, making the cavity electron beam welding device 100 of the proton cyclotron high frequency cavity lighter, easy to carry, adjust or rotate, and can also save costs. The fan-shaped portion 12 may refer to a fan-shaped plate-like structure, which may have high strength and deformation resistance, and is used to support and install other components. The central axes of the adapter portion 11 and the fan-shaped portion 12 may be along the same straight line, and the connection method may be but is not limited to bolts or screws, mortise and tenon joints or clamping, integral molding and welding, etc. The base 10 adopts a structure including the adapter portion 11 and the fan-shaped portion 12 to better adapt to the structure of the lower cavity 210.

[0031] The limiting mechanism 20 may refer to a mechanism for limiting the lower cavity 210, and the connection method between the limiting mechanism 20 and the fan-shaped portion 12 may be, but is not limited to, welding, bolt connection, riveting, etc. In the above scheme, the limiting mechanism 20 may be divided into three parts, namely, a first component 21, a second component 22, a third component 23 and a fourth component 24. The first component 21 is two components located on both sides of the arc length direction of the fan-shaped portion 12, and can be used to limit the movement of the fan-shaped wall segment 2012 in the central axial direction of the fan-shaped portion 12. The second component 22 may be arranged along the arc length direction of the fan-shaped portion 12, and can be used to limit the movement of the fan-shaped wall segment 2012 in the central axial direction and radial direction of the fan-shaped portion 12. The third component 23 may refer to an arc-shaped strip structure, which is detachably arranged above the second component 22, and can be used to limit the movement of the fan-shaped wall segment 2012 in the central axial direction of the fan-shaped portion 12 (which may refer to Figure 2 up and down directions).

[0032] The limiting mechanisms 20 of the two fan-shaped portions 12 can jointly limit the transition wall segment 2011. At the same time, the two fan-shaped wall segments 2012 that have been limited can also limit the transition wall segment 2011, thereby fixing the transition wall segment 2011 in the horizontal direction.

[0033] The first support member 30, the second support member 40, the third support member 50, the fourth support member 70, and the lateral limiting member 60 may refer to structures for supporting and fixing the sector wall segment 2012, the transition wall segment 2011, and the inner conductor 220. The height of the second support member 40 is less than that of the first support member 30, and they can respectively carry different components of the high-frequency cavity 200 of the proton cyclotron. For example, the first support member 30 and the third support member 50 support the sector wall segment 2012, the second support member 40 supports the inner conductor 220, and the fourth support member 70 is used to support the transition wall segment 2011. By positioning in layers, the center of gravity of the overall structure is reduced, the stability during welding is improved, deformation caused by vibration or stress concentration is reduced, and the reliability of welding is enhanced. The third support member 50 can be selectively arranged on the upper side of the second support member 40 as needed, which can enhance the support for special structural components in the high-frequency cavity 200 of the proton cyclotron, achieve on-demand configuration, and further improve the reliability of welding.

[0034] The lateral limiting member 60 can support and fix the inner conductor 220 and is used to limit the movement of the inner conductor 220 in the radial direction of the sector part 12 (which may refer to Figure 2 the left-right direction), further improving the stability of welding. Among them, the lateral limiting member 60 is detachably connected to the sector part 12, and its position can be flexibly adjusted or it can be disassembled, which is convenient for operation.

[0035] In the above technical solution, referring to Figures 2 to 5 , when the cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron is in use, first place the inner conductor 220 in the first limiting space 20a on the right side. The first conductor part 2201 of the inner conductor 220 is supported on the second support member 40. Then, use the lateral limiting member 60 to limit the left side of the first conductor part 2201. Next, place the third support member 50 on the second conductor part 2202. Immediately afterwards, assemble the lower cavity 210. The two sector wall segments 2012 are respectively placed in the two first limiting spaces 20a. The left sector wall segment 2012 is placed on the first support member 30, the right sector wall segment 2012 is placed on the third support member 50, the transition wall segment 2011 is placed in the second limiting space 20b, and then place one side shell wall 202 in the third limiting space 30a on the left side and the other side shell wall 202 in the fourth limiting space 40a on the right side.

[0036] After the lower cavity 210 and the inner conductor 220 are assembled to the cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron, on the left side of the device, the first support component 30 and the third component 23 can limit the fan-shaped wall segment 2012 in the up-down direction, the two first components 21 can limit the fan-shaped wall segment 2012 in the front-back direction, and the second component 22 can limit the fan-shaped wall segment 2012 in the left-right direction. On the right side of the device, the second support component 40, the third support component 50 and the third component 23 can limit the fan-shaped wall segment 2012 and the inner conductor 220 in the up-down direction, the two first components 21 can limit the fan-shaped wall segment 2012 in the front-back direction, and the lateral limiter 60 and the second component 22 can limit the inner conductor 220 and the fan-shaped wall segment 2012 in the left-right direction. In the middle position of the device, the two fan-shaped wall segments 2012 that have been limited can limit the front and back and left and right directions of the transition wall segment 2011. Since part of the fourth component 24 extends to the upper side of the transition portion 11, the extended part of the fourth component 24 and the fourth support component 70 can cooperate to limit the transition wall segment 2011 in the up and down directions.

[0037] It can be understood that, through the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity, the various components of the lower cavity 210, that is, the two fan-shaped wall segments 2012 and the transition wall segment 2011 and the inner conductor 220 can be spliced together, thereby only one welding tool is needed, and after one assembly, the welding of the two fan-shaped wall segments 2012 and the transition wall segment 2011 of the lower cavity 210, the welding between the two fan-shaped wall segments 2012 and the two side shell walls 202, and the welding between the second conductor portion 2202 of the inner conductor 220 and the side shell wall 202 can be achieved at the same time. Moreover, these welding processes only require entering the vacuum chamber once, and there is no need to frequently enter and exit the vacuum chamber, which can improve the welding efficiency.

[0038] According to the cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron according to the embodiment of the present invention, the precise assembly and positioning of the multiple components of the lower cavity 210 can be achieved through the limiting mechanism 20, the first supporting member 30, the second supporting member 40, the third supporting member 50, the fourth supporting member 70 and the lateral limiting member 60, as well as the precise assembly and positioning of the inner conductor 220 and the lower cavity 210, which is conducive to reducing the number of welding tools and reducing human operation errors. In addition, the positioning of the inner conductor 220 and the lower cavity 210 by the above device is more accurate, which can reduce the risk of welding deformation during welding and improve the welding quality and the performance stability of the finished welded product. The above device can also reduce the assembly steps and the number of times of entering the vacuum chamber, and can achieve one-time welding of multiple welds in the vacuum chamber, which can improve the welding efficiency, and can also be used as a post-welding shape-keeping tool, with better applicability.

[0039] In some embodiments of the present invention, reference Figures 3 to 5, the first component 21 includes a plurality of first limiting members 211, and the plurality of first limiting members 211 are arranged at intervals along the radial direction of the fan-shaped portion 12; the first limiting member 211 includes a fixing portion 2111 and a clamping portion 2112, the fixing portion 2111 is provided on the fan-shaped portion 12, and a clamping groove 211a is provided between the clamping portion 2112 and the fixing portion 2111. The clamping groove 211a is open toward the side of the first limiting space 20a, and the clamping portion 2112 is movably arranged on the fixing portion 2111 in the vertical direction; wherein, the clamping portion 2112 of at least one first limiting member 211 protrudes relative to the fixing portion 2111 toward the side close to the center of the fan-shaped portion 12.

[0040] The number of the first limiting members 211 can be, but is not limited to, two, four, six, eight, ten, twelve, fourteen, sixteen, eighteen, twenty, twenty-two, etc. The fixing portion 2111 can refer to the structure for connecting the fan-shaped portion 12 and the clamping portion 2112, and can be, but is not limited to, materials such as cast steel, alloy steel, stainless steel, and aluminum alloy, etc. The "vertical direction" can refer to Figure 2 the up and down direction.

[0041] The clamping portion 2112 can refer to an L-shaped structure. A clamping groove 211a is formed between the clamping portion 2112 and the fixing portion 2111, and the clamping groove 211a is open toward the side of the first limiting space 20a. The first flanging 20121 of the fan-shaped wall segment 2012 (see Figure 1 ) can be placed into the clamping groove 211a from the open direction, and the fan-shaped wall segment 2012 is pressed by moving the clamping portion 2112 in the vertical direction, thereby restricting the movement of the fan-shaped wall segment 2012 in the vertical direction.

[0042] In the above technical solution, the clamping portion 2112 can move and cooperate with the fixing portion 2111 to form an adjustable clamping groove 211a, restricting the movement of the fan-shaped wall segment 2012 of the lower cavity 210, preventing thermal deformation displacement and ensuring weld alignment, and improving the reliability of welding. The plurality of first limiting members 211 are arranged at intervals along the radial direction of the fan-shaped portion 12. Through multi-point distributed limiting, the fan-shaped wall segment 2012 can be limited, and the positioning error of the fan-shaped wall segment 2012 can be controlled within a very small range, further improving the reliability of welding.

[0043] Refer to Figure 5 , the clamping portion 2112 of at least one first limiting member 211 protrudes relative to the fixing portion 2111 toward the side close to the center of the fan-shaped portion 12. Thus, the protruding portion of the clamping portion 2112 can abut against the fan-shaped wall segment 2012, thereby further limiting the fan-shaped wall segment 2012 and improving the fixing reliability of the fan-shaped wall segment 2012. Optionally, refer to Figure 5Among the plurality of first limiting members 211 , the clamping portions 2112 of the first limiting members 211 located at both ends of the sector portion 12 in the arc length direction are protruded relative to the fixing portion 2111 .

[0044] In some embodiments of the present invention, reference Figure 3 and Figure 4 The first component 21 includes a second limiting member 212, which is disposed on the adapter portion 11 and is used to form a second limiting space 20b.

[0045] The second limiting member 212 may be in the shape of, but not limited to, a block, a column, etc. It is understandable that the second limiting member 212 can limit the horizontal position of the transfer wall segment 2011. Figure 3 and Figure 4 The second limiting member 212 can limit the adapter wall segment 2011 in the front-to-back direction.

[0046] In some embodiments of the present invention, reference Figure 7 The clamping portion 2112 includes a connected connecting section 21121 and a clamping section 21122. The connecting section 21121 is arranged on the side of the fixing portion 2111 away from the first limiting space 20a. The connecting section 21121 is provided with a first strip hole 21121a. The fixing portion 2111 is provided with a first adjusting bolt 21111. The first adjusting bolt 21111 is passed through the first strip hole 21121a. The clamping section 21122 is arranged on the upper side of the fixing portion 2111.

[0047] The connecting section 21121 may refer to a structure connecting the clamping section 21122 and the fixing portion 2111. The first strip-shaped hole 21121a may refer to a long strip-shaped hole, the length of which may determine the adjustment range, and the length direction may determine the adjustment direction.

[0048] In the above technical solution, the first strip hole 21121a of the connecting section 21121 and the first adjusting bolt 21111 of the fixing portion 2111 form a movable connection. The operator only needs to loosen the bolt to move the clamping portion 2112 up and down along the strip hole direction, and quickly adjust the opening height of the clamping groove 211a to complete the positioning adjustment. The operation is simple and the welding efficiency can be improved. At the same time, the structure is simple and the cost can be reduced.

[0049] In some embodiments of the present invention, reference Figures 2 to 4 , Figure 6 The second component 22 includes a plurality of adjustable limit members 221, which are arranged at intervals along the arc length direction. The adjustable limit members 221 are movably arranged on the fan-shaped portion 12 along the radial direction of the fan-shaped portion 12. A contoured positioning plate 223 is provided on one side of the adjustable limit member 221 close to the first limit space 20a, and the contoured positioning plate 223 extends along the arc length direction of the fan-shaped portion 12.

[0050] The adjustable limit member 221 may refer to a mechanism that can move radially along the sector portion 12, and the number may be, but is not limited to, two, four, six, eight, ten, twelve, fourteen, sixteen, eighteen, twenty, twenty-two, etc. For example, referring to Figure 2 and Figure 4 , there are four adjustable limit members 221.

[0051] In the above technical solution, the adjustable limit members 221 spaced apart along the arc length direction can further limit the movement of the sector wall segment 2012 and the side shell wall 202 in the radial direction of the sector portion 12, apply radial constraint forces at the circumferential discrete points, form an "annular dot matrix" limiting effect, make the radial clamping force evenly distributed along the circumference, avoid local overload, and can also ensure the positioning stability, thereby guaranteeing the stability of welding.

[0052] The profiling positioning plate 223 may refer to a plate member that matches the surface shape of the side shell wall 202. For example, if the side shell wall 202 is an arc-shaped wall, the profiling positioning plate 223 is an arc-shaped plate. It can be understood that since the profiling positioning plate 223 is profiled with the surface shape of the side shell wall 202 and extends along the arc length direction of the sector portion 12, the profiling positioning plate 223 can provide a large limiting surface and can fit well on the side shell wall 202, which is beneficial to improving the positioning accuracy of the side shell wall 202. Secondly, the profiling positioning plate 223 is a long strip plate. Adopting this structure can reduce the number of adjustable limit members 221 while ensuring that the multiple adjustable limit members 221 have a large limiting surface, which is beneficial for avoiding interference during welding. Referring to Figure 4 , the number of adjustable limit members 221 is small, and they can be far from both ends of the side shell wall 202, so that a larger space can be left for both ends of the side shell wall 202, reducing interference and facilitating the welding of the front and rear sides of the side shell wall 202 and the sector wall segment 2012 by the electron beam gun head.

[0053] Optionally, multiple profiling positioning plates 223 are arranged in the up and down direction on the adjustable limit members 221.

[0054] In some embodiments of the present invention, referring to Figure 8 , the adjustable limit member 221 includes a first part 2211 and a second part 2212 that are vertically connected. The first part 2211 is provided with a second strip-shaped hole 2211a, and the sector portion 12 is provided with a second adjusting bolt 121. The second adjusting bolt 121 passes through the second strip-shaped hole 2211a. The second part 2212 is perpendicular to the sector portion 12, and a relief groove 2212a is provided on the side close to the limiting space.

[0055] The second strip hole 2211a may refer to a long strip hole, the length of which may determine the adjustment range, and the length direction of which may determine the adjustment direction. The adjustable stopper 221 may be moved by the position of the second adjustment bolt 121 in the second strip hole 2211a. The avoidance groove 2212a may refer to a groove structure that plays an avoidance role, and may be used to adjust the second flange 2021 (see FIG. 202 ) of the side shell wall 202. Figure 1 ) to avoid.

[0056] In the above technical solution, the first part 2211 and the second part 2212 can be vertically connected, so that the second part 2212 can form a clamping surface in a plane perpendicular to the fan-shaped portion 12, and the second strip hole 2211a of the first part 2211 cooperates with the second adjustment bolt 121 of the fan-shaped portion 12 to allow the adjustable stopper 221 to move in the radial direction of the fan-shaped portion 12, which can limit the movement of the fan-shaped wall segment 2012 and the side shell wall 202 in the radial direction of the fan-shaped portion 12, and provide auxiliary stopper in the height direction to avoid the fan-shaped wall segment 2012 from tilting up and down, thereby improving the reliability of the adjustable stopper 221. The avoidance groove 2212a can avoid the second flange 2021 of the side shell wall 202 to avoid interference with the side shell wall 202.

[0057] In some embodiments of the present invention, reference Figure 2 and Figure 4 The second component 22 includes a fixed limiting member 222, which is centrally arranged on the sector portion 12, and a plurality of adjustable limiting members 221 are arranged on both sides of the fixed limiting member 222 along the arc length direction.

[0058] The fixed stopper 222 may be, but is not limited to, a columnar component or a block component, etc. Figure 2 The fixed stopper 222 may be an L-shaped block structure. It is understandable that the fixed stopper 222 can provide support and limit for the second conductor part 2202, thereby preventing the gap between the second conductor part 2202 and the fan-shaped wall section 2012 from becoming larger due to gravity during welding, thereby ensuring welding reliability.

[0059] In some embodiments of the present invention, reference Figures 2 to 4 The third component 23 is an arc-shaped strip extending in the arc length direction, and the radius of the third component 23 is greater than the radius of the sector 12. In the above technical solution, the arc-shaped strip structure extends in the arc length direction of the sector 12, and can form a continuous surface contact with the high-frequency cavity 200 of the proton cyclotron, restricting the movement of the lower cavity 210 in the direction of the central axis of the sector 12, thereby improving the welding accuracy.

[0060] Secondly, the radius of the third component 23 is greater than the radius of the fan-shaped portion 12, so that the distance between the middle area of the third component 23 and the arc length edge of the fan-shaped portion 12 is greater than the distance between the two end areas of the third component 23 and the arc length edge of the fan-shaped portion 12. In this way, the third component 23 can be kept away from the arc length edge position of the fan-shaped wall segment 2012 while pressing the fan-shaped wall segment 2012, thereby ensuring that there is a large space between the arc length edge position of the fan-shaped wall segment 2012 and the third component 23, which can reduce interference and facilitate the welding of the fan-shaped wall segment 2012 and the side shell wall 202 by the electron beam gun head.

[0061] In some embodiments of the present invention, reference Figure 10 The fourth component 24 includes a middle section 241 and a bending section 242. The middle section 241 is arc-shaped and is located on the upper side of the first supporting component 30 or the second supporting component 40. The bending section 242 is arranged at both ends of the middle section 241 in the length direction and is bent relative to the middle section 241. The bending section 242 is located on the upper side of the adapter 11.

[0062] It is understandable that, with the above structure, the middle section 241 can press the fan-shaped wall section 2012 downward, while the bending section 242 can press the transition wall section 2011 downward, so that the fourth component 24 can simultaneously press and limit the fan-shaped wall section 2012 and the transition wall section 2011.

[0063] In some embodiments of the present invention, reference Figure 2 , Figure 3 and Figure 6 The sector-shaped portion 12 is provided with an inspection port 12 a ; there are multiple inspection ports 12 a , which are spaced apart along the arc length direction of the sector-shaped portion 12 , and each inspection port 12 a extends in the radial direction of the sector-shaped portion 12 .

[0064] The inspection opening 12a may be provided on the sector 12 having the second support member 40, or both sectors 12 may be provided with the inspection opening 12a. The number of the inspection openings 12a may be, but is not limited to, two, four, six, eight, ten, twelve, fourteen, sixteen, eighteen, twenty, twenty-two, etc. At the same time, the sizes of the inspection openings 12a may be different or the same.

[0065] In the above technical solution, by providing the inspection port 12a on the fan-shaped portion 12, it is convenient for the handheld probe of the laser tracker to extend into the cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron accelerator, and the external dimensions can be monitored in real time during the assembly process, ensuring the accurate assembly and positioning of the internal parts before welding, improving the accuracy of welding, and thus improving the reliability of welding. It can also be used for post-welding inspection, which can also ensure the welding quality and improve the welding reliability. At the same time, the inspection port 12a can also reduce the weight of the cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron accelerator, saving materials.

[0066] In some embodiments of the present invention, reference Figure 6 and Figure 10 The lateral limiting member 60 includes a positioning pin 61 and a limiting block 62 . The positioning pin 61 and the limiting block 62 are detachably arranged on the fan-shaped portion 12 . The limiting block 62 is arranged on a side of the positioning pin 61 close to the adapter portion 11 .

[0067] The positioning pin 61 may be a cylindrical structure, which is detachably provided on the sector portion 12. Optionally, the sector portion 12 and the first conductor portion 2201 of the inner conductor 220 may have reserved holes, and the positioning pin 61 may be inserted into the corresponding reserved holes to achieve a detachable connection with the sector portion 12 and the first conductor portion 2201. The limit block 62 may be a block structure, which is movably and detachably provided on the sector portion 12.

[0068] In the above technical solution, the positioning pin 61 is used as a positioning element, and by cooperating with the holes of the sector-shaped portion 12 and the first conductor portion 2201, the first conductor portion 2201 can be limited in the radial direction of the sector-shaped portion 12. Similarly, the limiting block 62 can abut against one end of the first conductor portion 2201, further limiting the first conductor portion 2201 in the radial direction of the sector-shaped portion 12. In other words, the positioning pin 61 and the limiting block 62 can realize combined limiting, thereby accurately fixing and limiting the inner conductor 220, and improving the reliability of welding.

[0069] In some embodiments of the present invention, reference Figure 2 and Figure 3 The first supporting member 30 includes a plurality of first plates 31, which are spaced apart along the arc length direction; the second supporting member 40 includes a plurality of second plates 41, which are spaced apart along the arc length direction.

[0070] In the above technical solution, by setting the first support member 30 and the second support member 40 into the above structure, the structure of the first support member 30 and the second support member 40 can be simplified, which is convenient for processing and manufacturing, and the size and weight of the first support member 30 and the second support member 40 can be reduced, thereby reducing the weight of the entire welding device and facilitating the transportation and disassembly and installation of the welding device. On the other hand, the structure of the first plate 31 and the second plate 41 arranged at intervals is similar to the "reinforcement rib" and can improve the strength of the base 10, thereby improving the reliability of the cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron. At the same time, the gaps arranged at intervals can allow the structure to produce slight elastic deformation, absorb dynamic impact energy, and extend the service life.

[0071] In some embodiments of the present invention, reference Figure 11 The cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron also includes a rotating mechanism 80, which includes a first rotating part 81 and a second rotating part 82. The first rotating part 81 is connected to the second rotating part 82 and drives the second rotating part 82 to rotate around a first direction. The second rotating part 82 is connected to the adapter part 11 and drives the adapter part 11 to rotate around a second direction, and the second direction is perpendicular to the first direction.

[0072] The first rotating part 81 and the second rotating part 82 may refer to a mechanism capable of outputting a rotational motion, and may be, but not limited to, a motor, a rotary oil cylinder, a rotary air cylinder, etc. As an example, the first direction may refer to Figure 11 The left and right directions, the second direction can refer to Figure 11 Up and down direction.

[0073] It can be understood that since the workpiece formed by the lower cavity 210 and the inner conductor 220 has many welds, and multiple welds are distributed on the upper surface and side surfaces of the workpiece, after entering the vacuum chamber once, the entire welding device can be driven to rotate as a whole through the rotating mechanism 80, thereby conveniently adjusting the workpiece posture, realizing the welding requirements of multi-angle and multi-pass welds, and making the electron beam gun head closer to the welding area, which is suitable for annular welds.

[0074] In some embodiments of the present invention, reference Figure 6 The adapter portion 11 is provided with a mounting shaft 11 a , and the mounting shaft 11 a is configured to be used for mounting the second rotating portion 82 .

[0075] It is understandable that the adapter 11 can be detachably connected to the second rotating part 82 through the installation shaft 11a, thereby facilitating the installation and removal of other components except the rotating mechanism 80, and also facilitating the fixing of the bottom shell wall 201, the side shell wall 202, and the inner conductor 220 on the welding device. Optionally, a claw structure can be provided at the output end of the second rotating part 82, and the claw structure can be engaged with the installation shaft 11a, thereby achieving the connection and fixation of the second rotating part 82 and the adapter 11.

[0076] refer to Figure 12 The cavity electron beam welding method of the proton cyclotron high-frequency cavity 200 according to the embodiment of the present invention comprises the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity of any of the above embodiments. The method comprises: Step S1, using the cavity electron beam welding device 100 of the proton cyclotron high frequency cavity to fix the sector wall segment 2012, the transition wall segment 2011, the side shell wall 202 and the inner conductor 220; Step S2 , placing the cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron into the vacuum chamber, welding the sector wall segment 2012 and the side shell wall 202 , and welding the side shell wall 202 and the inner conductor 220 .

[0077] According to the cavity electron beam welding method of the proton cyclotron high-frequency cavity 200 of the embodiment of the present invention, the sector-shaped wall segment 2012, the transition wall segment 2011, the side shell wall 202 and the inner conductor 220 are placed in the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity, and the adjustable limiter 221 and the first limiter 211 are adjusted to fix the sector-shaped wall segment 2012, the transition wall segment 2011, the side shell wall 202 and the inner conductor 220. Then, the cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron is placed in the vacuum chamber, and the fan-shaped wall segment 2012 and the transition wall segment 2011 are welded, the fan-shaped wall segment 2012 and the side shell wall 202 are welded, and the side shell wall 202 and the inner conductor 220 are welded. All welding can be completed at one time, avoiding entering the vacuum chamber again, reducing the number of tooling for welding the cavity electron beam of the high-frequency cavity 200 of the proton cyclotron, improving the utilization rate of the tooling, and saving costs.

[0078] In some embodiments of the present invention, reference Figure 13 The steps of fixing the sector wall segment 2012, the transition wall segment 2011, the side shell wall 202 and the inner conductor 220 by using the cavity electron beam welding device 100 of the high frequency cavity of the proton cyclotron accelerator include: The inner conductor 220 is placed on the second support member 40 and is limitedly matched with the lateral limit member 60, and the hole position of the inner conductor 220 is matched with the lateral limit member 60, and the third support member 50 is placed on the inner conductor 220; Invert the bottom shell wall 201 so that one of the two fan-shaped wall segments 2012 is supported on the first support member 30 and is in limiting cooperation with the corresponding first limiting member 211, and the other of the two fan-shaped wall segments 2012 is supported on the third support member 50 and is in limiting cooperation with the corresponding first limiting member 211. Then, support the adapter wall segment 2011 on the fourth support member 70 and make it in limiting cooperation with the fan-shaped wall segments 2012 on both sides and the second limiting member 212; Place the two side shell walls 202 into the third limiting space 30a and the fourth limiting space 40a respectively, install the third member 23 on the second member 22 to limit the top of the fan-shaped wall segment 2012, and install the fourth member 24 on the second member 22 to limit the top of the adapter wall segment 2011.

[0079] In the above technical solution, place the inner conductor 220 on the second support member 40 and make it in limiting cooperation with the lateral limiting member 60, and align the hole position of the inner conductor 220 with the lateral limiting member 60, and place the third support member 50 on the inner conductor 220, which can limit the movement of the inner conductor 220. Invert the bottom shell wall 201 so that one of the two fan-shaped wall segments 2012 is supported on the first support member 30 and is in limiting cooperation with the corresponding first limiting member 211, and the other of the two fan-shaped wall segments 2012 is supported on the third support member 50 and is in limiting cooperation with the corresponding first limiting member 211, which can limit the movement of the fan-shaped wall segment 2012. Support the adapter wall segment 2011 on the fourth support member 70 and make it in limiting cooperation with the fan-shaped wall segments 2012 on both sides and the second limiting member 212, which can limit the movement of the adapter wall segment 2011. Place the two side shell walls 202 into the third limiting space 30a and the fourth limiting space 40a respectively, install the third member 23 on the second member 22 to limit the top of the fan-shaped wall segment 2012, and install the fourth member 24 on the second member 22 to limit the top of the adapter wall segment 2011, which can limit the movement of the side shell wall 202, and at the same time ensure the installation position of the inner conductor 220 on the side shell wall 202, and ensure that the fan-shaped wall segment 2012, the adapter wall segment 2011, the side shell wall 202 and the inner conductor 220 can be turned and fixed stably at multiple angles on the cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron, improving the welding reliability.

[0080] In some embodiments of the present invention, refer to Figure 14 , the steps of fixing the fan-shaped wall segment 2012, the adapter wall segment 2011, the side shell wall 202 and the inner conductor 220 by using the cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron may further include: Install the first support member 30 on both of the two fan-shaped parts 12, and remove the second support member 40, the third support member 50, and the lateral limiting member 60; Support two sector wall segments 2012 of the bottom shell wall 201 on corresponding first support members 30 and limit and cooperate with corresponding first members 21; Support the transition wall segment 2011 of the bottom shell wall 201 on a corresponding fourth support member 70 and limit and cooperate with corresponding first members 21; Place two side shell walls 202 into two third limiting spaces 30a respectively, install a third member 23 on a second member 22 to limit the top of the sector wall segment 2012, and install a fourth member 24 on the second member 22 to limit the top of the transition wall segment 2011; Place the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity into the vacuum chamber and weld the side shell wall 202 and the sector wall segment 2012 of the bottom shell wall 201; Take out the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity, remove the welded lower cavity 210, and adjust the two sectors 12 so that one installs the first support member 30 and the other installs the second support member 40 and the lateral limiting member 60; Place the inner conductor 220 on the second support member 40 and limit and cooperate with the lateral limiting member 60, align the hole position of the inner conductor 220 with the lateral limiting member 60, and place a third support member 50 on the inner conductor 220; Reinstall the lower cavity 210 on the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity, support it on the third support member 50 and the first support member 30, and limit and cooperate with the corresponding first member 21. At the same time, install the third member 23 on the second member 22 to limit the top of the sector wall segment 2012, and install the fourth member 24 on the second member 22 to limit the top of the transition wall segment 2011; Put the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity into the vacuum chamber again and weld the inner conductor 220 and the corresponding side shell wall 202.

[0081] In the above technical solution, the sector wall segment 2012 of the side shell wall 202 and the bottom shell wall 201, the inner conductor 220 and the corresponding side shell wall 202 can be welded respectively. Only two entries into the vacuum chamber are required, which can reduce the number of times of the tooling for welding the cavity electron beam of the proton cyclotron high-frequency cavity 200, improve the utilization rate of the tooling, and save costs.

[0082] The following combines Figures 2 to 10 to describe a specific embodiment of the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity of the present invention.

[0083] The cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity includes: a base 10, a limiting mechanism 20, a first support member 30, a second support member 40, a third support member 50, a fourth support member 70, and a lateral limiting member 60.

[0084] The base 10 includes an adapter portion 11 and two sector portions 12, and the two sector portions 12 are connected by the adapter portion 11. Among them, the sector portion 12 where the second support member 40 is provided is provided with four inspection ports 12a, and the four inspection ports 12a are arranged at intervals along the arc length direction of the sector portion 12, and each inspection port 12a extends along the radial direction of the sector portion 12.

[0085] The limiting mechanism 20 is arranged on the two sector portions 12, and the limiting mechanism 20 includes a first member 21, a second member 22, a third member 23, and a fourth member 24. There are two first members 21 and they are arranged on both sides of the sector portion 12 in the arc length direction. The second member 22 is arranged on the side of the sector portion 12 away from the adapter portion 11. The third member 23 and the fourth member 24 are located on the upper side of the second member 22 and are detachably connected to the second member 22. The fourth member 24, the third member 23, the second member 22, and the two first members 21 jointly define a first limiting space 20a. The limiting mechanisms 20 of the two sector portions 12 jointly define a second limiting space 20b.

[0086] The first member 21 includes a plurality of first limiting members 211, and the plurality of first limiting members 211 are arranged at intervals along the radial direction of the sector portion 12. The first limiting member 211 includes a fixing portion 2111 and a clamping portion 2112. The fixing portion 2111 is arranged on the sector portion 12. There is a clamping groove 211a between the clamping portion 2112 and the fixing portion 2111. The clamping groove 211a is open towards the side of the first limiting space 20a, and the clamping portion 2112 is movably arranged on the fixing portion 2111 in the vertical direction. The clamping portion 2112 includes a connected connecting section 21121 and a clamping section 21122. The connecting section 21121 is arranged on the side of the fixing portion 2111 away from the first limiting space 20a. The connecting section 21121 is provided with a first strip-shaped hole 21121a, and the fixing portion 2111 is provided with a first adjusting bolt 21111. The first adjusting bolt 21111 passes through the first strip-shaped hole 21121a, and the clamping section 21122 is arranged on the upper side of the fixing portion 2111.

[0087] The first member 21 further includes a second limiting member 212, and the second limiting member 212 is arranged on the adapter portion 11 and is used to form the second limiting space 20b.

[0088] The second component 22 includes a plurality of adjustable stoppers 221, which are arranged at intervals along the arc length direction, and the adjustable stoppers 221 are movably arranged on the sector 12 along the radial direction of the sector 12. The adjustable stopper 221 includes a first portion 2211 and a second portion 2212 which are vertically connected, the first portion 2211 is provided with a second strip hole 2211a, the sector 12 is provided with a second adjusting bolt 121, the second adjusting bolt 121 is passed through the second strip hole 2211a, the second portion 2212 is perpendicular to the sector 12, and a side close to the limit space is provided with an avoidance groove 2212a.

[0089] The second component 22 includes a fixed limiting member 222 , which is centrally arranged on the sector-shaped portion 12 , and a plurality of adjustable limiting members 221 are arranged on both sides of the fixed limiting member 222 along the arc length direction.

[0090] The third component 23 is in the shape of an arc-shaped strip extending along the arc length direction, and the radius of the third component 23 is greater than the radius of the sector-shaped portion 12 .

[0091] The first support component 30 is located in the first limiting space 20a and is detachably arranged on a sector 12, and a third limiting space 30a is formed between the first support component 30 and the second component 22. The first support component 30 includes five first plates 31, and the five first plates 31 are arranged at intervals along the arc length direction; The second support component 40 is located in the first limiting space 20a and is detachably arranged on the other sector 12. A fourth limiting space 40a is formed between the second support component 40 and the second component 22. The height of the second support component 40 is less than the height of the first support component 30. The second support component 40 includes three second plates 41, which are spaced apart along the arc length direction.

[0092] The third supporting member 50 is a supporting block, and is provided on the upper side of the second supporting member 40 .

[0093] The fourth supporting member 70 is located in the second limiting space 20 b and is provided on the adapter portion 11 .

[0094] The lateral stopper 60 and the second support member 40 are arranged on the same sector 12 and on the other side of the sector 12 close to the adapter 11. The lateral stopper 60 is detachably connected to the sector 12. The lateral stopper 60 includes a positioning pin 61 and a stopper block 62. The positioning pin 61 and the stopper block 62 are detachably arranged on the sector 12. The stopper block 62 is arranged on one side of the positioning pin 61 close to the adapter 11.

[0095] In the description of this specification, the descriptions referring to terms such as "some embodiments", "optionally", "furthermore", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0096] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electron beam welding device for the cavity of a proton cyclotron high-frequency cavity, characterized in that, Comprising: A base including a connecting portion and two sector portions, the two sector portions being connected by the connecting portion; A limiting mechanism, the limiting mechanism being provided on both of the two sector portions. The limiting mechanism includes a first component, a second component, a third component, and a fourth component. There are two first components provided on both sides in the arc length direction of the sector portion. The second component is provided on the side of the sector portion away from the connecting portion. The third component and the fourth component are located above the second component and are detachably connected to the second component. The fourth component is arranged closer to the connecting portion than the third component and partially extends above the connecting portion. The fourth component, the third component, the second component, and the two first components jointly define a first limiting space; the limiting mechanisms between the two sector portions jointly define a second limiting space; A first support component located within the first limiting space and detachably provided on at least one of the sector portions, a third limiting space being formed between the first support component and the second component; A second support component located within the first limiting space and detachably provided on one of the sector portions, a fourth limiting space being formed between the second support component and the second component, the height of the second support component being less than the height of the first support component; A third support component selectively arranged above the second support component; A fourth support component located within the second limiting space and provided on the connecting portion; A lateral limiting member provided on the same sector portion as the second support component and on the other side of the sector portion close to the connecting portion, the lateral limiting member being detachably connected to the sector portion.

2. The electron beam welding device for the cavity of the high-frequency cavity of the proton cyclotron according to claim 1, wherein The first component includes a plurality of first limiting members, the plurality of first limiting members being spaced apart along the radial direction of the sector portion; the first limiting member includes a fixing portion and a clamping portion, the fixing portion being provided on the sector portion, a clamping groove being provided between the clamping portion and the fixing portion, the clamping groove being open towards the side of the first limiting space, the clamping portion being movably provided on the fixing portion in the vertical direction; wherein, the clamping portion of at least one of the first limiting members protrudes towards the center of the sector portion relative to the fixing portion.

3. The electron beam welding device for the cavity of the proton cyclotron high-frequency cavity according to claim 2, wherein The first component includes a second limiting member, the second limiting member being provided on the connecting portion and used for forming the second limiting space.

4. The electron beam welding device for the cavity of the proton cyclotron high-frequency cavity according to claim 2 or 3, characterized in that, The second component includes a plurality of adjustable limiting members, the plurality of adjustable limiting members being spaced apart along the arc length direction, the adjustable limiting members being movably provided on the sector portion in the radial direction of the sector portion, a profiling positioning plate being provided on the side of the adjustable limiting member close to the first limiting space, the profiling positioning plate extending along the arc length direction of the sector portion.

5. The cavity electron beam welding device for the high-frequency cavity of the proton cyclotron according to claim 4, characterized in that, The second component includes a fixed limiting member, the fixed limiting member being centrally arranged on the sector portion, the plurality of adjustable limiting members being provided on both sides of the fixed limiting member along the arc length direction.

6. The cavity electron beam welding device for the high-frequency cavity of the proton cyclotron according to claim 1, wherein The third component is an arc-shaped long strip extending along the arc length direction, the radius of the third component being greater than the radius of the sector portion.

7. The cavity electron beam welding device for the high-frequency cavity of the proton cyclotron according to claim 1 or 6, characterized in that The fourth component includes a middle section and a bending section, the middle section is arc-shaped and is located on the upper side of the first supporting component or the second supporting part, the bending section is arranged at both ends of the middle section in the length direction and is bent relative to the middle section, and the bending section is located on the upper side of the transition part.

8. The cavity electron beam welding device for the high-frequency cavity of the proton cyclotron according to claim 1, wherein The first supporting component includes a plurality of first plates, which are spaced apart along the arc length direction; the second supporting component includes a plurality of second plates, which are spaced apart along the arc length direction.

9. The cavity electron beam welding device for the high-frequency cavity of the proton cyclotron according to claim 1, characterized in that, It also includes a rotating mechanism, which includes a first rotating part and a second rotating part, the first rotating part is connected to the second rotating part and drives the second rotating part to rotate around a first direction, the second rotating part is connected to the adapter part and drives the adapter part to rotate around a second direction, and the second direction is perpendicular to the first direction.

10. A method for electron beam welding of the cavity of a proton cyclotron high-frequency cavity, characterized in that, A cavity electron beam welding device comprising a proton cyclotron high-frequency cavity as claimed in any one of claims 1 to 9; the proton cyclotron high-frequency cavity comprises a lower cavity and an inner conductor, the lower cavity comprises a bottom shell wall and two side shell walls, the bottom shell wall comprises two fan-shaped wall segments and a transition wall segment connecting the two fan-shaped wall segments, one end of each fan-shaped wall segment in a radial direction is open and forms an opening, and the side shell wall covers the opening; the method comprises: The cavity electron beam welding device of the high-frequency cavity of the proton cyclotron is used to fix the sector wall segment, the transition wall segment, the side shell wall and the inner conductor; The cavity electron beam welding device of the proton cyclotron high-frequency cavity is placed into a vacuum chamber, and the fan-shaped wall segment and the side shell wall are welded, and the side shell wall and the inner conductor are welded.

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