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

Abstract

The present invention relates to the field of cyclotron accelerators and discloses a cavity electron beam welding device and welding method for a proton cyclotron high-frequency cavity. The device comprises: a base, comprising an adapter and two fan-shaped parts; a limiting mechanism, comprising a first component, a second component, a third component, and a fourth component, wherein the fourth component, the third component, the second component, and the two first components jointly define a first limiting space, and a second limiting space is jointly defined between the two limiting mechanisms; a first supporting component, wherein a third limiting space is formed between the first supporting component and the second component; a second supporting component, wherein a fourth limiting space is formed between the second supporting component and the second component; a third supporting component, arranged on the upper side of the second supporting component; a fourth supporting component, located within the second limiting space, and a lateral limiting member, arranged on the other side of the fan-shaped part near the adapter. The present invention can reduce the number of welding tools and the number of welding operations, thereby improving welding efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of cyclotron accelerators, and in particular to a cavity electron beam welding device and a welding method for a high-frequency cavity of a proton cyclotron accelerator. 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. Its processing and manufacturing quality is directly related to the overall performance and stability of the equipment. Therefore, the precision manufacturing of the high-frequency cavity is particularly critical. When the proton cyclotron is welded with electron beam welding tooling, multiple sets of welding tooling are required to fix and weld multiple workpieces in batches. The flexibility is low. Replacing products requires the design of a new set of corresponding tooling, resulting in long changeover time when producing small batches of multiple varieties, increasing time costs. In addition, the welding tooling structure will block the electron beam path or interfere with the movement of the electron beam gun head. Welding a workpiece requires multiple removal from the vacuum chamber and repositioning and fixing before proceeding to the next welding sequence. The vacuuming and venting time takes about one to several hours. In addition, each installation and fixation to the welding position requires repeated meter positioning, resulting in relatively low work efficiency. Summary of the Invention

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

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

[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 both 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. Limiting 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 is 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 adapter part; the lateral limiting member and the second support member are provided on the same fan-shaped part, and are provided on the other side of the fan-shaped part close to the adapter 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-mentioned 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-mentioned 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. It can also be used as a post-weld shape-preserving tool and has 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, and the fixing portion is arranged on the fan-shaped portion, and a clamping groove is provided between the clamping portion and the fixing portion, and the clamping groove is open toward one side of the first limiting space, and the clamping portion is movably provided on the fixing portion in a vertical direction; wherein, the clamping portion of at least one first limiting member is protruded 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, which 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 provided 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 limiting member, which is centrally arranged on the sector portion, and the plurality of adjustable limiting members are provided on both sides of the fixed limiting member 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 support component or the second support 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 further includes a rotating mechanism, wherein the rotating mechanism includes a first rotating part and a second rotating part, wherein the first rotating part is connected to the second rotating part and drives the second rotating part to rotate around a first direction, and the second rotating part is connected to the adapter part and drives the adapter part to rotate around a second direction, wherein 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 includes 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 includes a lower cavity and an inner conductor, the lower cavity includes a bottom shell wall and two side shell walls, the bottom shell wall includes 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 includes: using the cavity electron beam welding device for the proton cyclotron high-frequency cavity to fix the fan-shaped wall segments, the transition wall segments, the side shell walls, and the inner conductor; placing the cavity electron beam welding device for the proton cyclotron high-frequency cavity into a vacuum chamber, welding the fan-shaped wall segments to the side shell walls, and welding the side shell walls to the inner conductor.

[0016] According to an embodiment of the present invention, a cavity electron beam welding method for a proton cyclotron high-frequency cavity comprises placing a sector wall segment, a transition wall segment, a side shell wall, and an inner conductor into a cavity electron beam welding device for the proton cyclotron high-frequency cavity. Adjusting an adjustable stopper and a first stopper secure the sector wall segment, the transition wall segment, the side shell wall, and the inner conductor. The cavity electron beam welding device for the proton cyclotron high-frequency cavity is then placed into a vacuum chamber, and the sector wall segment and the transition wall segment are welded, as well as the sector wall segment and the side shell wall, and the side shell wall and the inner conductor are welded. All welding can be completed in one go, avoiding re-entry into the vacuum chamber. This reduces the number of tooling operations required for welding the cavity electron beam of the proton cyclotron high-frequency cavity, improves tooling utilization, and saves costs.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by 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 readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 A schematic diagram of a portion of the structure of a high-frequency cavity of a proton cyclotron accelerator according to an embodiment of the present invention;

[0020] Figure 2A schematic diagram of the three-dimensional structure of a cavity electron beam welding device for a proton cyclotron high-frequency cavity provided by some embodiments of the present invention;

[0021] Figure 3 A top view of a cavity electron beam welding device for a proton cyclotron high-frequency cavity with a portion of the structure removed, provided in some embodiments of the present invention;

[0022] Figure 4 A schematic diagram of the structure of the proton cyclotron high-frequency cavity electron beam welding device after assembly with the lower cavity and inner conductor provided in some embodiments of the present invention;

[0023] Figure 5 for Figure 4 A local enlarged schematic diagram of location I;

[0024] Figure 6 A cross-sectional view of the assembly of the cavity electron beam welding device, the lower cavity body, and the inner conductor of the proton cyclotron high-frequency cavity provided in some embodiments of the present invention;

[0025] Figure 7 for Figure 2 A partial enlarged view of location II;

[0026] Figure 8 for Figure 2 A partial enlarged view of point III;

[0027] Figure 9 for Figure 2 A partial enlarged view of IV;

[0028] Figure 10 for Figure 2 A local enlarged view of the V part;

[0029] Figure 11 Schematic diagram of the three-dimensional structure of the proton cyclotron high-frequency cavity electron beam welding device after assembly with the lower cavity and inner conductor provided in other embodiments of the present invention;

[0030] Figure 12 Flow chart of the cavity electron beam welding method of the proton cyclotron high frequency cavity provided by some embodiments of the present invention Figure 1 ;

[0031] Figure 13 Flow chart of the cavity electron beam welding method of the proton cyclotron high frequency cavity provided by some embodiments of the present invention Figure 2 ;

[0032] Figure 14 Flow chart of the cavity electron beam welding method of the proton cyclotron high frequency cavity provided by some embodiments of the present invention Figure 3 .

[0033] Reference numerals:

[0034] 100. Cavity electron beam welding device for high-frequency cavity of proton cyclotron;

[0035] 10. Base; 11. Adapter; 11a. Mounting shaft; 12. Sector; 12a. Inspection port; 121. Second adjusting bolt;

[0036] 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. Avoidance groove; 222. Fixed limiting member; 223. Contoured positioning plate; 23. Third component; 24. Fourth component; 241. Intermediate section; 242. Bending section;

[0037] 30. First supporting member; 30a. Third limiting space; 31. First plate;

[0038] 40. Second supporting member; 40a. Fourth limiting space; 41. Second plate;

[0039] 50. A third supporting member;

[0040] 60. Lateral limiter; 61. Positioning pin; 62. Limit block;

[0041] 70. Fourth supporting member;

[0042] 80. Rotating mechanism; 81. First rotating portion; 82. Second rotating portion;

[0043] 200, proton cyclotron high-frequency cavity; 210, lower cavity; 201, bottom shell wall; 2011, transition wall segment; 2012, fan-shaped wall segment; 20121, first flange; 202, side shell wall; 202a, notch; 2021, second flange; 220, inner conductor; 2201, first conductor portion; 2202, second conductor portion. DETAILED DESCRIPTION

[0044] The following describes embodiments of the present invention in detail. Examples of the embodiments 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0045] 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 to 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish and describe features, without any distinction in order or importance.

[0047] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0048] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0049] Reference below Figures 1-9 , describing a cavity electron beam welding device 100 of a proton cyclotron high-frequency cavity according to an embodiment of the present invention.

[0050] like Figure 1 As shown, the high-frequency cavity 200 of a proton cyclotron may include a lower cavity 210, an inner conductor 220, and an upper cavity. The inner conductor 220 is disposed on the lower cavity 210, and the upper cavity cover is disposed on 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 segment 2011 and a sector wall segment 2012. The sector wall segments 2012 are two, connected by the transition wall segment 2011. One radial end of the sector wall segment 2012 is open to form an opening. The side shell wall 202 covers the opening and is welded to the sector wall segment 2012. The inner conductor 220 includes a first conductor portion 2201 and a second conductor portion 2202. One of the side shell walls 202 has a notch 202a. The second conductor portion 2202 is disposed within the notch 202a and is welded to the side shell wall 202.

[0051] It is understandable that the above structure constitutes a compact proton cyclotron high-frequency cavity, and has a special-shaped structure with 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 this structure, the conventional process is: first, each component is processed with high precision, and then electron beam welding technology is used in stages for precise splicing. This method requires the use of multiple welding tools. For the welding of every two components, a set of tools is required, and the welding is carried out in a vacuum chamber once. The number of tools required is large, and frequent entry into the vacuum chamber is time-consuming. The total time required to complete the welding of the entire workpiece is long, and the work efficiency is low.

[0052] 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 various components of the lower cavity 210 and welding the lower cavity 210 and the inner conductor 220.

[0053] like Figures 2 to 3 As shown, a cavity electron beam welding device 100 of a 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.

[0054] The base 10 includes an adapter portion 11 and two fan-shaped portions 12, and the two fan-shaped portions 12 are connected by the adapter portion 11. The two fan-shaped portions 12 are each provided with a limiting mechanism 20, which 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 fan-shaped portion 12 in the arc length direction. The second component 22 is arranged on the side of the fan-shaped portion 12 away from the adapter portion 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 near the adapter portion 11 relative to the third component 23 and partially extends to the upper side of the adapter portion 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 portions 12 jointly define a second limiting space 20b. The first support member 30 is located in the first confining space 20a and is detachably mounted on at least one sector 12. A third confining space 30a is formed between the first support member 30 and the second member 22. The second support member 40 is located in the first confining space 20a and is detachably mounted on one sector 12. A fourth confining space 40a is formed between the second support member 40 and the second member 22. The height of the second support member 40 is less than that of the first support member 30. The third support member 50 is arranged above the second support member 40. The fourth support member 70 is located in the second confining space 20b and is mounted on the adapter 11. The lateral limiter 60 is mounted on the same sector 12 as the second support member 40 and is located on the other side of the sector 12 near the adapter 11. The lateral limiter 60 is detachably connected to the sector 12.

[0055] The base 10 may be the basic support structure for the proton cyclotron high-frequency cavity cavity electron beam welding device 100, and the base 10 and the proton cyclotron high-frequency cavity 200 have a similar outer profile. The base 10 may be made of, but is not limited to, alloy steel, stainless steel, aluminum alloy, or composite materials. In the above embodiment, the base 10 may include an adapter 11 and two fan-shaped portions 12, with the two fan-shaped portions 12 disposed on either side of the adapter 11. The adapter 11 may be a hollow circular structure that can be used to connect the two fan-shaped portions 12, ensuring a rigid connection between the two fan-shaped portions 12, improving overall stability, and preventing displacement caused by vibration during welding. Furthermore, the hollow interior of the adapter 11 can significantly reduce the material usage of the adapter 11, making the proton cyclotron high-frequency cavity cavity electron beam welding device 100 lighter, easier to carry, adjust, or rotate, and also saving costs. The fan-shaped portion 12 may be a fan-shaped plate-like structure that can have high strength and deformation resistance and is used to support and mount other components. The central axes of the adapter portion 11 and the fan-shaped portion 12 can be along the same straight line, and the connection method can be, but is not limited to, bolts or screws, mortise and tenon joints or clamping, integrated 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.

[0056] 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 located on both sides of the arc length direction of the fan-shaped portion 12, which 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 can 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 can refer to Figure 2 up and down directions).

[0057] 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.

[0058] The first support member 30, the second support member 40, the third support member 50, the fourth support member 70, and the lateral stopper 60 may refer to structures used to support and secure the sector wall segment 2012, the transition wall segment 2011, and the inner conductor 220. The second support member 40 is smaller than the first support member 30 and can support different components of the proton cyclotron high-frequency cavity 200. 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 supports the transition wall segment 2011. This layered positioning lowers the center of gravity of the overall structure, improves welding stability, reduces deformation caused by vibration or stress concentration, and enhances welding reliability. The third support member 50 can be selectively positioned above the second support member 40 as needed to enhance support for specific structural components in the proton cyclotron high-frequency cavity 200, enabling on-demand configuration and further improving welding reliability.

[0059] The lateral limiting member 60 can support and fix the inner conductor 220, and is used to limit the radial direction (which can be referred to as the radial direction) of the inner conductor 220 in the sector portion 12. Figure 2 The lateral limiting member 60 is detachably connected to the fan-shaped portion 12, and can be flexibly adjusted in position or disassembled, which is easy to operate.

[0060] In the above technical solution, referring to Figures 2 to 5 When using the cavity electron beam welding device 100 for the high-frequency cavity of a proton cyclotron, the inner conductor 220 is first placed in the first limiting space 20a on the right side, with the first conductor portion 2201 of the inner conductor 220 supported on the second support component 40. The lateral limiting member 60 is then used to limit the left side of the first conductor portion 2201. The third support component 50 is then placed on the second conductor portion 2202. Next, the lower cavity 210 is assembled, with the two sector wall segments 2012 respectively placed in the two first limiting spaces 20a, with the left sector wall segment 2012 placed on the first support component 30 and the right sector wall segment 2012 placed on the third support component 50. The transition wall segment 2011 is placed in the second limiting space 20b. Then, one side shell wall 202 is placed in the third limiting space 30a on the left side, and the other side shell wall 202 is placed in the fourth limiting space 40a on the right side.

[0061] After the lower cavity 210 and the inner conductor 220 are assembled into the cavity electron beam welding device 100 of the high-frequency cavity of a proton cyclotron, on the left side of the device, the first support component 30 and the third component 23 can limit the vertical position of the sector wall segment 2012, the two first components 21 can limit the front-to-back position of the sector wall segment 2012, and the second component 22 can limit the left-to-right position of the sector wall segment 2012. 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 vertical position of the sector wall segment 2012 and the inner conductor 220, the two first components 21 can limit the front-to-back position of the sector wall segment 2012, and the lateral limiter 60 and the second component 22 can limit the left-to-right position of the inner conductor 220 and the sector wall segment 2012. 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 part 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.

[0062] It can be understood that the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity can splice together the various components of the lower cavity 210, that is, the two sector wall segments 2012 and the transition wall segment 2011 and the inner conductor 220. Only one welding tool is needed, and after one assembly, the welding of the two sector wall segments 2012 and the transition wall segment 2011 of the lower cavity 210, the welding between the two sector 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, without the need to frequently enter and exit the vacuum chamber, which can improve welding efficiency.

[0063] According to the cavity electron beam welding device 100 of the high-frequency cavity of a proton cyclotron according to an embodiment of the present invention, the precise assembly and positioning of multiple components of the lower cavity 210, as well as the precise assembly and positioning of the inner conductor 220 and 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, 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-mentioned device is more accurate, which can reduce the risk of welding deformation during welding and improve the welding quality and performance stability of the finished welded product. The above-mentioned 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. It can also be used as a post-weld shape-preserving tool and has better applicability.

[0064] In some embodiments of the present invention, reference Figures 3 to 5The first component 21 includes a plurality of first limiting members 211, and the plurality of first limiting members 211 are spaced apart along the radial direction of the sector-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 sector-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 one side of the first limiting space 20a, and the clamping portion 2112 is movably provided on the fixing portion 2111 along the vertical direction; wherein, the clamping portion 2112 of at least one first limiting member 211 is protruded relative to the fixing portion 2111 toward the center side of the sector-shaped portion 12.

[0065] The number of the first limiting members 211 may be, but is not limited to, two, four, six, eight, ten, twelve, fourteen, sixteen, eighteen, twenty, twenty-two, etc. The fixing portion 2111 may refer to a structure for connecting the fan-shaped portion 12 and the clamping portion 2112, and may be, but is not limited to, a material such as cast steel, alloy steel, stainless steel, and aluminum alloy. Figure 2 Up and down direction.

[0066] The clamping portion 2112 may be an L-shaped structure, wherein a clamping groove 211a is formed between the clamping portion 2112 and the fixing portion 2111, and the clamping groove 211a is open toward one side of the first limiting space 20a, and the first flange 20121 (see FIG. Figure 1 ) can be placed into the clamping groove 211a from the open direction, and the fan-shaped wall segment 2012 can be moved in the vertical direction by the clamping portion 2112 to tighten the fan-shaped wall segment 2012, thereby limiting the vertical movement of the fan-shaped wall segment 2012.

[0067] 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, which restricts the movement of the fan-shaped wall segment 2012 of the lower cavity 210, preventing thermal deformation and displacement, ensuring weld alignment, and improving welding reliability. Multiple 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 in position, controlling the positioning error of the fan-shaped wall segment 2012 to a very small range, further improving welding reliability.

[0068] refer to Figure 5 The clamping portion 2112 of at least one first position-limiting member 211 is protruded relative to the fixing portion 2111 toward the center of the sector portion 12, so that the protruding portion of the clamping portion 2112 can stop against the sector wall segment 2012, thereby further limiting the sector wall segment 2012 and improving the fixing reliability of the sector wall segment 2012. Optionally, refer to Figure 5Among the multiple 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 .

[0069] 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 provided on the adapter portion 11 and is used to form a second limiting space 20b.

[0070] The second limiting member 212 may be in the shape of a block, a column, etc. It is understood that the second limiting member 212 can limit the horizontal direction of the adapter wall segment 2011. For example, referring to Figure 3 and Figure 4 The second limiting member 212 can limit the adapter wall segment 2011 in the front-to-back direction.

[0071] 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.

[0072] 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.

[0073] In the above technical solution, the first strip-shaped 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-shaped hole, quickly adjusting the opening height of the clamping slot 211a to complete the positioning adjustment. This simple operation can improve welding efficiency. At the same time, the simple structure can reduce costs.

[0074] 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 provided on the sector-shaped portion 12 along the radial direction of the sector-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 sector-shaped portion 12.

[0075] The adjustable limiter 221 may refer to a mechanism that can move radially along the sector 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.

[0076] In the above technical solution, the adjustable limiters 221 spaced apart along the arc length direction can further limit the radial movement of the sector wall segment 2012 and the side shell wall 202 along the sector portion 12, and apply radial restraint force on discrete points on the circumference to form a "circular lattice" limiting effect, so that the radial clamping force is evenly distributed along the circumference, avoiding local overload, and ensuring positioning stability, thereby ensuring welding stability.

[0077] The contoured positioning plate 223 may refer to a plate that matches the surface shape of the side shell wall 202. For example, the side shell wall 202 is an arc-shaped wall, and the contoured positioning plate 223 is an arc-shaped plate. It is understandable that since the contoured positioning plate 223 is contoured to the surface shape of the side shell wall 202 and extends along the arc length direction of the fan-shaped portion 12, the contoured positioning plate 223 can provide a larger limiting surface and can fit better on the side shell wall 202, which is beneficial to improving the positioning accuracy of the side shell wall 202. Secondly, the contoured positioning plate 223 is a long strip plate. The use of this structure can reduce the number of adjustable limiting members 221 while ensuring that multiple adjustable limiting members 221 have a larger limiting surface, which is beneficial for avoidance during welding. Reference Figure 4 The number of adjustable limiters 221 is small, and they can be far away from the two end sides of the side shell wall 202, so that more space can be left for the two end sides 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 fan-shaped wall segment 2012 by the electron beam gun head.

[0078] Optionally, a plurality of contoured positioning plates 223 are provided on the adjustable limiting member 221 along the up and down directions.

[0079] In some embodiments of the present invention, reference Figure 8 The adjustable limiter 221 includes a first part 2211 and a second part 2212 vertically connected. The first part 2211 is provided with a second strip hole 2211a. The fan-shaped part 12 is provided with a second adjusting bolt 121. The second adjusting bolt 121 is passed through the second strip hole 2211a. The second part 2212 is perpendicular to the fan-shaped part 12, and an avoidance groove 2212a is provided on the side close to the limiting space.

[0080] The second strip hole 2211a may be 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 limiter 221 may be moved by adjusting the position of the second adjusting bolt 121 in the second strip hole 2211a. The avoidance groove 2212a may be a groove structure that serves as an avoidance mechanism, and may be used to adjust the second flange 2021 (see FIG. 202 ) of the side shell wall 202. Figure 1 ) to avoid.

[0081] In the above technical solution, the first portion 2211 and the second portion 2212 can be vertically connected, so that the second portion 2212 can form a clamping surface in a plane perpendicular to the sector portion 12. The second strip hole 2211a of the first portion 2211 cooperates with the second adjustment bolt 121 of the sector portion 12, allowing the adjustable limiter 221 to move in the radial direction of the sector portion 12, thereby limiting the radial movement of the sector wall segment 2012 and the side shell wall 202 in the sector portion 12. At the same time, auxiliary limit is provided in the height direction to prevent the sector wall segment 2012 from tilting up and down, thereby improving the reliability of the adjustable limiter 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.

[0082] 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 provided on both sides of the fixed limiting member 222 along the arc length direction.

[0083] The fixed stopper 222 may be, but is not limited to, a columnar component or a block component. Figure 2 The fixed stopper 222 may be an L-shaped block structure. It is understood that the fixed stopper 222 can provide support and limitation for the second conductor portion 2202, thereby preventing the gap between the second conductor portion 2202 and the sector-shaped wall segment 2012 from widening due to gravity during welding, thereby ensuring welding reliability.

[0084] In some embodiments of the present invention, reference Figures 2 to 4 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. In the above technical solution, the arc-shaped strip structure extends along the arc length direction of the sector-shaped portion 12, forming a continuous surface contact with the proton cyclotron high-frequency cavity 200, limiting the movement of the lower cavity 210 along the central axis of the sector-shaped portion 12 and improving welding accuracy.

[0085] 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.

[0086] 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 support component 30 or the second support component 40. The bending section 242 is arranged at both ends of the middle section 241 in the longitudinal direction and is bent relative to the middle section 241. The bending section 242 is located on the upper side of the adapter 11.

[0087] It can be understood that the middle section 241 of the above structure 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.

[0088] In some embodiments of the present invention, reference Figure 2 、 Figure 3 and Figure 6 The sector 12 is provided with an inspection port 12a; the inspection port 12a is multiple, and the multiple inspection ports 12a are spaced apart along the arc length direction of the sector 12, and each inspection port 12a extends in the radial direction of the sector 12.

[0089] The inspection opening 12a can be provided on the sector 12 having the second support member 40, or both sectors 12 can be provided with an inspection opening 12a. The number of inspection openings 12a can be, but is not limited to, two, four, six, eight, ten, twelve, fourteen, sixteen, eighteen, twenty, twenty-two, etc. Furthermore, the sizes of the inspection openings 12a can be uniform or inconsistent.

[0090] In the above technical solution, the provision of inspection port 12a on sector 12 facilitates the insertion of a handheld probe of a laser tracker into the interior of proton cyclotron high-frequency cavity cavity electron beam welding apparatus 100. This allows for real-time monitoring of the overall dimensions during assembly, ensuring the precise assembly and positioning of internal components before welding, improving welding accuracy and, consequently, welding reliability. Inspection port 12a can also be used for post-weld inspection, similarly ensuring welding quality and improving welding reliability. Furthermore, inspection port 12a can reduce the weight of proton cyclotron high-frequency cavity cavity electron beam welding apparatus 100, saving material.

[0091] 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 .

[0092] The positioning pin 61 may be a cylindrical structure, detachably mounted on the sector portion 12. Optionally, the sector portion 12 and the first conductor portion 2201 of the inner conductor 220 may have pre-set holes, and the positioning pin 61 may be inserted into the corresponding pre-set holes to achieve a removable connection with the sector portion 12 and the first conductor portion 2201. The stopper 62 may be a block-shaped structure, movably and detachably mounted on the sector portion 12.

[0093] In the above technical solution, the positioning pin 61 acts as a positioning element, and by cooperating with the holes in the sector-shaped portion 12 and the first conductor portion 2201, it can limit the radial position of the first conductor portion 2201 in the sector-shaped portion 12. Similarly, the limiting block 62 can abut one end of the first conductor portion 2201, further limiting the radial position of the first conductor portion 2201 in the sector-shaped portion 12. In other words, the positioning pin 61 and the limiting block 62 can achieve combined limiting, thereby accurately fixing and limiting the inner conductor 220, and improving welding reliability.

[0094] In some embodiments of the present invention, reference Figure 2 and Figure 3 The first supporting component 30 includes a plurality of first plates 31, which are spaced apart along the arc length direction; the second supporting component 40 includes a plurality of second plates 41, which are spaced apart along the arc length direction.

[0095] In the above technical solution, by configuring the first support member 30 and the second support member 40 to have the above structure, the structure of the first support member 30 and the second support member 40 can be simplified, making it easier to process and manufacture. The size and weight of the first support member 30 and the second support member 40 can also be reduced, thereby reducing the weight of the entire welding device and facilitating the transportation, 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, similar to a "reinforcement rib", can increase the strength of the base 10, thereby improving the reliability of the cavity electron beam welding device 100 for the high-frequency cavity of the proton cyclotron. At the same time, the intervals can allow the structure to produce slight elastic deformation, absorb dynamic impact energy, and extend the service life.

[0096] In some embodiments of the present invention, reference Figure 11 The cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity 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. The second direction is perpendicular to the first direction.

[0097] 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.

[0098] It can be understood that since the workpiece composed of 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.

[0099] 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 .

[0100] It will be appreciated that the adapter portion 11 can be removably connected to the second rotating portion 82 via the mounting shaft 11a, thereby facilitating the installation and removal of components other than the rotating mechanism 80, and also facilitating the securing of the bottom shell wall 201, the side shell wall 202, and the inner conductor 220 to the welding device. Optionally, a claw structure can be provided at the output end of the second rotating portion 82, which can engage with the mounting shaft 11a, thereby achieving a secure connection between the second rotating portion 82 and the adapter portion 11.

[0101] refer to Figure 12 The method for electron beam welding of a proton cyclotron high-frequency cavity 200 according to an embodiment of the present invention includes the electron beam welding device 100 for a proton cyclotron high-frequency cavity according to any of the above embodiments. The method includes:

[0102] 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;

[0103] Step S2 : placing the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity 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 .

[0104] According to the cavity electron beam welding method of the proton cyclotron high-frequency cavity 200 of an 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 a vacuum chamber, and the sector wall segment 2012 and the transition wall segment 2011 are welded, the sector 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 of the proton cyclotron 200, improving the utilization rate of the tooling, and saving costs.

[0105] 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 using the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity include:

[0106] Place the inner conductor 220 on the second support member 40 and engage with the lateral limit member 60, and align the hole of the inner conductor 220 with the lateral limit member 60, and place the third support member 50 on the inner conductor 220;

[0107] The bottom shell wall 201 is inverted so that one of the two sector-shaped wall segments 2012 is supported on the first support member 30 and is limited by the corresponding first limiting member 211. The other of the two sector-shaped wall segments 2012 is supported on the third support member 50 and is limited by the corresponding first limiting member 211. Next, the transition wall segment 2011 is supported on the fourth support member 70 and is limited by the sector-shaped wall segments 2012 on both sides and the second limiting member 212.

[0108] Place the two side shell walls 202 into the third limiting space 30a and the fourth limiting space 40a respectively, and install the third component 23 on the second component 22 to limit the top of the fan-shaped wall segment 2012, and install the fourth component 24 on the second component 22 to limit the top of the adapter wall segment 2011.

[0109] In the above technical solution, the inner conductor 220 is placed on the second support component 40 and engaged with the lateral stopper 60, and the hole of the inner conductor 220 is engaged with the lateral stopper 60, and the third support component 50 is placed on the inner conductor 220, thereby limiting the movement of the inner conductor 220. The bottom shell wall 201 is inverted, so that one of the two fan-shaped wall segments 2012 is supported on the first support component 30 and engaged with the corresponding first stopper 211, and the other of the two fan-shaped wall segments 2012 is supported on the third support component 50 and engaged with the corresponding first stopper 211, thereby limiting the movement of the fan-shaped wall segments 2012. The transition wall segment 2011 is supported on the fourth support component 70 and engaged with the fan-shaped wall segments 2012 on both sides and the second stopper 212, thereby limiting the movement of the transition wall segment 2011. The two side shell walls 202 are respectively placed in the third limiting space 30a and the fourth limiting space 40a, and the third component 23 is installed on the second component 22, and the top of the fan-shaped wall segment 2012 is limited. The fourth component 24 is installed on the second component 22, and the top of the transition wall segment 2011 is limited. This can limit the movement of the side shell wall 202 and ensure the installation position of the inner conductor 220 on the side shell wall 202. It ensures that the fan-shaped wall segment 2012, the transition wall segment 2011, the side shell wall 202 and the inner conductor 220 can be flipped, fixed and stably at multiple angles on the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity, thereby improving welding reliability.

[0110] In some embodiments of the present invention, reference Figure 14The step of fixing the sector wall segment 2012, the transition wall segment 2011, the side shell wall 202 and the inner conductor 220 using the cavity electron beam welding device 100 of the proton cyclotron high frequency cavity may further include:

[0111] Install the first support member 30 on both sectors 12 and remove the second support member 40 , the third support member 50 , and the lateral stopper 60 ;

[0112] The two sector-shaped wall segments 2012 of the bottom shell wall 201 are supported on the corresponding first supporting components 30 and are limitedly engaged with the corresponding first components 21;

[0113] The transition wall section 2011 of the bottom shell wall 201 is supported on the corresponding fourth supporting component 70 and is limitedly engaged with the corresponding first component 21;

[0114] Place the two side shell walls 202 into the two third limiting spaces 30a respectively, and install the third component 23 on the second component 22 to limit the top of the sector wall segment 2012, and install the fourth component 24 on the second component 22 to limit the top of the transition wall segment 2011;

[0115] 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 fan-shaped wall segment 2012 of the bottom shell wall 201;

[0116] 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 sector-shaped parts 12 so that one is installed with the first support member 30 and the other is installed with the second support member 40 and the lateral limiter 60;

[0117] Place the inner conductor 220 on the second support member 40 and engage with the lateral limit member 60, and align the hole of the inner conductor 220 with the lateral limit member 60, and place the third support member 50 on the inner conductor 220;

[0118] The lower cavity 210 is reinstalled on the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity, supported on the third support component 50 and the first support component 30, and engaged with the corresponding first component 21 for limiting position. At the same time, the third component 23 is installed on the second component 22 to limit the top of the sector-shaped wall segment 2012, and the fourth component 24 is installed on the second component 22 to limit the top of the transition wall segment 2011.

[0119] The cavity electron beam welding device 100 of the high-frequency cavity of the proton cyclotron is placed into the vacuum chamber again, and the inner conductor 220 and the corresponding side shell wall 202 are welded.

[0120] In the above technical solution, the fan-shaped wall segments 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 separately, and only two vacuum chambers need to be entered. This can reduce the number of tooling operations for welding the cavity electron beam of the proton cyclotron high-frequency cavity 200, improve tooling utilization, and save costs.

[0121] The following combination Figures 2 to 10 , describing a specific embodiment of the cavity electron beam welding device 100 of the proton cyclotron high-frequency cavity of the present invention.

[0122] The cavity electron beam welding device 100 of the high-frequency cavity of a proton cyclotron 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 .

[0123] The base 10 includes an adapter portion 11 and two fan-shaped portions 12, which are connected by the adapter portion 11. The fan-shaped portion 12, on which the second support member 40 is provided, has four inspection openings 12a, which are spaced apart along the arc length of the fan-shaped portion 12, and each inspection opening 12a extends in the radial direction of the fan-shaped portion 12.

[0124] The limiting mechanism 20 is provided on the two sector-shaped portions 12 and comprises a first component 21, a second component 22, a third component 23, and a fourth component 24. Two first components 21 are provided, one on each side of the sector-shaped portion 12 in the arc length direction. The second component 22 is provided on the side of the sector-shaped portion 12 away from the adapter portion 11. The third component 23 and the fourth component 24 are located above the second component 22 and are detachably connected to the second component 22. The fourth component 24, the third component 23, the second component 22, and the two first components 21 collectively define a first limiting space 20a. The limiting mechanisms 20 of the two sector-shaped portions 12 collectively define a second limiting space 20b.

[0125] The first component 21 includes a plurality of first limiting members 211, which are spaced apart along the radial direction of the sector-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 sector-shaped portion 12. A clamping groove 211a is defined between the clamping portion 2112 and the fixing portion 2111. The clamping groove 211a is open toward one side of the first limiting space 20a. The clamping portion 2112 is movably provided 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 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.

[0126] The first component 21 further includes a second limiting member 212 . The second limiting member 212 is provided on the adapter portion 11 and is used to form a second limiting space 20 b.

[0127] The second component 22 includes a plurality of adjustable stoppers 221, which are spaced apart along the arc length direction and are movably mounted on the sector 12 in the radial direction of the sector 12. The adjustable stoppers 221 include a first portion 2211 and a second portion 2212, which are vertically connected. The first portion 2211 is provided with a second strip-shaped hole 2211a, and the sector 12 is provided with a second adjustment bolt 121, which is inserted into the second strip-shaped hole 2211a. The second portion 2212 is perpendicular to the sector 12 and has an avoidance groove 2212a on one side near the limiting space.

[0128] 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 provided on both sides of the fixed limiting member 222 along the arc length direction.

[0129] The third component 23 is in the shape of an arc-shaped strip extending along the arc length direction. The radius of the third component 23 is greater than the radius of the sector-shaped portion 12 .

[0130] The first support member 30 is located within the first limiting space 20a and is detachably mounted on a sector 12. A third limiting space 30a is formed between the first support member 30 and the second member 22. The first support member 30 includes five first plates 31 spaced apart along the arc length.

[0131] The second support member 40 is located within the first limiting space 20a and is detachably mounted on the other sector 12. A fourth limiting space 40a is formed between the second support member 40 and the second member 22. The height of the second support member 40 is less than that of the first support member 30. The second support member 40 includes three second plates 41, which are spaced apart along the arc length direction.

[0132] The third support member 50 is a support block and is provided on an upper side of the second support member 40 .

[0133] The fourth supporting member 70 is located in the second limiting space 20 b and is provided on the adapter portion 11 .

[0134] The lateral stopper 60 is disposed on the same sector-shaped portion 12 as the second support member 40, and is located on the other side of the sector-shaped portion 12 near the adapter portion 11. The lateral stopper 60 is detachably connected to the sector-shaped portion 12. The lateral stopper 60 includes a positioning pin 61 and a limiting block 62. The positioning pin 61 and the limiting block 62 are detachably mounted on the sector-shaped portion 12, and the limiting block 62 is located on the side of the positioning pin 61 near the adapter portion 11.

[0135] Throughout this specification, references to terms such as "some embodiments," "optionally," "further," or "some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0136] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A cavity electron beam welding device for a proton cyclotron high-frequency cavity, characterized in that: include: The base comprises a connecting portion and two fan-shaped portions, wherein the two fan-shaped portions are connected via the connecting portion; A limiting mechanism, wherein the two fan-shaped portions are each provided with the limiting mechanism, the limiting mechanism comprising a first component, a second component, a third component and a fourth component, the first component being two and arranged on both sides of the fan-shaped portion in an arc length direction, the second component being arranged on a side of the fan-shaped portion away from the adapter portion, the third component and the fourth component being located on the upper side of the second component and being detachably connected to the second component, the fourth component being arranged relative to the third component close to the adapter portion and partially extending to the upper side of the adapter portion, the fourth component, the third component, the second component and the two first components jointly define a first limiting space; a second limiting space is jointly defined between the limiting mechanisms of the two fan-shaped portions; a first supporting member, located in the first limiting space and detachably mounted on at least one of the fan-shaped portions, wherein a third limiting space is formed between the first supporting member and the second member; a second supporting member, located in the first limiting space and detachably mounted on one of the fan-shaped portions, a fourth limiting space being formed between the second supporting member and the second member, and a height of the second supporting member being smaller than a height of the first supporting member; a third supporting member, the third supporting member being arranged on an upper side of the second supporting member; a fourth supporting member, located in the second limiting space and provided on the adapter portion; The lateral limiting member is provided on the same sector portion as the second supporting member and is provided on the other side of the sector portion close to the adapter portion. The lateral limiting member is detachably connected to the sector portion.

2. The cavity electron beam welding device of the proton cyclotron high-frequency cavity according to claim 1, characterized in that: 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, and a clamping groove is provided between the clamping portion and the fixed portion, the clamping groove is open toward one side of the first limiting space, and the clamping portion is movably provided on the fixing portion in a vertical direction; wherein, the clamping portion of at least one first limiting member is protruded relative to the fixing portion toward the side close to the center of the fan-shaped portion.

3. The cavity electron beam welding device for the high-frequency cavity of a proton cyclotron according to claim 2, characterized in that: The first component includes a second limiting member, which is provided on the transition portion and is used to form the second limiting space.

4. The cavity electron beam welding device of the proton cyclotron high-frequency cavity according to claim 2 or 3, characterized in that: The second component includes a plurality of adjustable limit members, which are arranged at intervals along the arc length direction. 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.

5. The cavity electron beam welding device for the high-frequency cavity of a proton cyclotron according to claim 4, characterized in that: The second component includes a fixed limiting member, which is centrally arranged on the sector portion, and a plurality of adjustable limiting members are arranged 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 a proton cyclotron according to claim 1, characterized in that: 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.

7. The cavity electron beam welding device for the high-frequency cavity of a 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 longitudinal 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 a proton cyclotron according to claim 1, characterized in that: 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 a 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 a high-frequency cavity of a proton cyclotron accelerator, characterized in that: A cavity electron beam welding device comprising a proton cyclotron high-frequency cavity according to any one of claims 1 to 9; the proton cyclotron high-frequency cavity comprising a lower cavity and an inner conductor, the lower cavity comprising a bottom shell wall and two side shell walls, the bottom shell wall comprising two sector-shaped wall segments and a transition wall segment connecting the two sector-shaped wall segments, one end of each sector-shaped wall segment in a radial direction being open and forming an opening, the side shell wall covering the opening; the method comprising: The cavity electron beam welding device of the proton cyclotron high-frequency cavity 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 sector wall segment and the side shell wall are welded, and the side shell wall and the inner conductor are welded.

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