阅读说明：本技术 四翼型射频四极场加速器腔体安装平台及其装配方法 (Four-wing type radio frequency quadrupole field accelerator cavity mounting platform and assembling method thereof ) 是由 金晓凤 王锋锋 张斌 李晨星 张周礼 窦为平 王志军 何源 于 2021-08-04 设计创作，主要内容包括：本发明涉及一种四翼型射频四极场加速器腔体安装平台及其装配方法,包括如下部件：主焊接底架,主焊接底架上装配有两直线导轨,直线导轨上装配有若干滑块,沿主焊接底架长度方向的两侧间隔且均匀设置有若干侧翼板；蜗轮蜗杆调节组件,数量若干,包括底部调节装置以及装配于底部调节装置上的举升千斤顶,蜗轮蜗杆调节组件装配于侧翼板的下方；三维可调组件,数量若干,包括滑轨台、支架组件和微调组件,滑轨台装配于滑块上,支架组件移动装配在滑轨台上,微调组件装配在支架组件上,支架组件被配置为调整加速器腔体的左右位置。该平台利用上下两层调节机构对腔体进行束流高度方向粗调和细调,提高了腔体安装的调整精度和效率。(The invention relates to a four-wing type radio frequency quadrupole field accelerator cavity mounting platform and an assembling method thereof, wherein the four-wing type radio frequency quadrupole field accelerator cavity mounting platform comprises the following components: the main welding chassis is provided with two linear guide rails, the linear guide rails are provided with a plurality of sliding blocks, and a plurality of side wing plates are arranged at intervals and uniformly along the two sides of the length direction of the main welding chassis; the worm and gear adjusting assemblies are a plurality of in number and comprise bottom adjusting devices and lifting jacks assembled on the bottom adjusting devices, and the worm and gear adjusting assemblies are assembled below the side wing plates; the three-dimensional adjustable assembly, quantity is a plurality of, including slide rail platform, bracket component and fine setting subassembly, the slide rail platform assembles on the slider, and the bracket component removes the assembly at the slide rail bench, and the fine setting subassembly assembles on the bracket component, and the bracket component is configured to the position about the adjustment accelerator cavity. The platform utilizes the upper and lower layers of adjusting mechanisms to carry out coarse adjustment and fine adjustment on the beam height direction of the cavity, so that the adjusting precision and efficiency of cavity installation are improved.)

1. The four-wing type radio frequency quadrupole field accelerator cavity mounting platform is characterized by comprising the following components:

the main welding chassis (3), two linear guide rails (4) are assembled on the main welding chassis (3), a plurality of sliding blocks (5) are assembled on the linear guide rails (4), and a plurality of side wing plates (10) are arranged at intervals and uniformly on two sides of the main welding chassis (3) in the length direction;

the worm and gear adjusting assemblies (6) are provided in a plurality of numbers and comprise bottom adjusting devices (6-4) and lifting jacks (6-3) assembled on the bottom adjusting devices (6-4), the worm and gear adjusting assemblies (6) are assembled below the side wing plates (10), the lifting jacks (6-3) are configured to adjust the up-down position of the main welding underframe (3), and the bottom adjusting devices (6-4) are configured to adjust the left-right position of the main welding underframe (3);

three-dimensional adjustable subassembly (7), quantity is a plurality of, including slide rail platform (7-1), bracket component and fine setting subassembly (7-6), slide rail platform (7-1) assemble in on slider (5), the bracket component removes the assembly and is in on slide rail platform (7-1), fine setting subassembly (7-6) assemble on the bracket component, the bracket component is configured to the position about the adjustment accelerator cavity, fine setting subassembly (7-6) are configured to the upper and lower position of adjustment accelerator cavity.

2. The four-wing type radio frequency quadrupole field accelerator cavity mounting platform according to claim 1, wherein the worm and gear adjusting assembly (6) further comprises a top support plate (6-1) and a lifting ball head (6-2), a concave spherical surface abutting against the lifting ball head (6-2) is arranged on the lower end surface of the top support plate (6-1), and the lifting ball head (6-2) is fixedly connected with the lifting jack (6-3).

3. The four-wing type radio frequency quadrupole field accelerator cavity mounting platform of claim 1, wherein the bottom adjusting device (6-4) comprises a bottom base welding box (6-4-2), a first horizontal roller cover plate (6-4-5), a first horizontal roller retaining frame (6-4-6), a second horizontal roller cover plate (6-4-7), a second horizontal roller retaining frame (6-4-16) and a horizontal roller bearing plate (6-4-8) are sequentially assembled in the bottom base welding box (6-4-2) from top to bottom in the vertical direction, horizontal rollers (6-4-9) are assembled in the first horizontal roller retaining frame (6-4-6) and the second horizontal roller retaining frame (6-4-16) in a crossed manner, the horizontal rollers (6-4-9) are configured to adjust the horizontal position of the main welding chassis (3).

4. The four-wing type radio frequency quadrupole field accelerator cavity mounting platform of claim 3, wherein the bottom base welding box (6-4-2) is further equipped with side rollers (6-4-10), the side rollers (6-4-10) are fixed in the bottom base welding box (6-4-2) through side roller fixing plates (6-4-13), each outer side surface of the bottom base welding box (6-4-2) is equipped with a welding adjusting screw (6-4-14), two step shafts (6-4-11) are arranged on two sides of the welding adjusting screw (6-4-14), one end of each step shaft (6-4-11) is fixed on the side roller fixing plate (6-4-13), the other end is a free end and penetrates through the side wall of the bottom base welding box (6-4-2).

5. The four-wing type radio frequency quadrupole field accelerator cavity mounting platform according to claim 1, wherein the three-dimensional adjustable assembly (7) further comprises a sliding table block (7-2) and a tensioning screw (7-7), and the sliding table (7-1) is assembled on the linear guide rail (4) through the sliding table block (7-2);

the bracket component comprises a supporting seat (7-3), a heightening block (7-4), a fine adjustment seat (7-5) and a fine adjustment component (7-6) which are sequentially assembled from bottom to top, wherein the supporting seat (7-3) is slidably assembled on a sliding rail table (7-1), the heightening block (7-4), the fine adjustment seat (7-5) and the fine adjustment component (7-6) are provided with through holes for accommodating the tensioning screws (7-7), the supporting seat (7-3) is configured to adjust the left and right positions of an accelerator cavity, and the fine adjustment component (7-6) is configured to adjust the upper and lower positions of the accelerator cavity.

6. The four-wing type radio frequency quadrupole field accelerator cavity mounting platform of claim 5, wherein the fine adjustment assembly (7-6) comprises a thrust ball bearing (7-6-1), a fine adjustment internal thread sleeve (7-6-3) and a fine adjustment external thread sleeve (7-6-2) annularly sleeved outside the fine adjustment internal thread sleeve (7-6-3), a stepped hole for accommodating the thrust ball bearing (7-6-1) is arranged on the fine adjustment seat (7-5), and the thrust ball bearing (7-6-1) annularly sleeved on the tensioning screw rod (7-7).

7. The four-wing type radio frequency quadrupole field accelerator cavity mounting platform of claim 1, further comprising a secondary welding chassis (8), wherein the secondary welding chassis (8) is detachably connected with the primary welding chassis (3) through a guide rail, and an adjusting part (8-1) is assembled on the secondary welding chassis (8), wherein the adjusting part (8-1) is configured to adjust the flatness of the primary welding chassis (3) and the secondary welding chassis (8).

8. The four-wing type radio frequency quadrupole field accelerator cavity mounting platform according to claim 1, further comprising a hoisting welding top frame (9), wherein the hoisting welding top frame (9) is detachably connected with the main welding bottom frame (3) through a plurality of hoisting screws (9-2), and end part protection rib plates (9-4) are assembled at the head end and the tail end of the hoisting welding top frame (9) and the main welding bottom frame (3) to form a rigid hoisting frame.

9. The four-wing type radio frequency quadrupole field accelerator cavity mounting platform according to claim 8, wherein a flexible protection plate (9-5) is arranged between the end protection rib plate (9-4) and the accelerator cavity inlet and outlet end plate to prevent the accelerator cavity from being damaged in the hoisting process.

10. A method of assembling the four-wing rf quadrupole field accelerator cavity mounting platform of any of claims 7-9, comprising the steps of:

placing a plurality of worm and gear adjusting assemblies (6) at positions planned in advance, assembling the main welding underframe (3) above the worm and gear adjusting assemblies (6), adjusting the worm and gear adjusting assemblies (6) to enable the installation size of the main welding underframe (3) to meet requirements, and assembling the three-dimensional adjustable assemblies (7) of each section of accelerator cavity on the sliding block (5);

placing the auxiliary welding underframe (8) at the tail end of the main welding underframe (3), adjusting the adjusting part (8-1) at the bottom of the auxiliary welding underframe (8), assembling a guide rail of the auxiliary welding underframe (8) on the guide rail surface of the main welding underframe (3), and ensuring that the sliding block (5) slides without obstacles;

sequentially assembling the accelerator cavities at all sections above the three-dimensional adjustable component (7), sliding the accelerator cavity at the tail end and the three-dimensional adjustable component (7) matched with the accelerator cavity to the upper part of the auxiliary welding underframe (8), and reserving a certain space between the accelerator cavities at all sections; then assembling positioning pins and sealing rings among the accelerator cavities, adjusting the position size of each accelerator cavity, assembling each positioning pin, and fixing screws on stainless steel jackets at two end faces of the accelerator cavity;

hoisting the hoisting welding top frame (9), assembling the hoisting screw (9-1) and the end part protection rib plates (9-4) at two ends in sequence, assembling the hoisting screw (9-1) in hoisting holes at two sides of the main welding bottom frame (3), assembling the protection plates (9-5) at the head and tail parts of an accelerator cavity, fastening the bottom of the end part protection rib plate (9-4) at the head and tail parts of the main welding bottom frame (3), adjusting the position of the hoisting screw (9-1) and fastening, and completing the assembly of the hoisting welding top frame (9).

Technical Field

The invention relates to a four-wing type radio frequency quadrupole field accelerator cavity mounting platform and an assembling method thereof, belonging to the technical field of mechanical assembly.

Background

The cavity of a four-wing Radio Frequency Quadrupole (RFQ) accelerator is a core component of a low-energy section of a particle accelerator and is formed by connecting a plurality of sections of cavities, and in a limited field environment, a special adjusting platform is required to support and adjust each section of cavity, and the assembly precision among each section of cavity is ensured.

At present, although the support of the four-wing type radio frequency quadrupole field cavity can also realize the functions of integral adjustment and single-section support adjustment, the support is seriously deformed due to the heavier weight of the cavity, and the adjustment of the adjusting device in the height direction is difficult to realize; in addition, the existing four-wing radio frequency quadrupole field cavity has the difficulties of increased length, limited field space and the like, and the existing support structure can not bear longer and heavier cavity assembly; the cavity and the support thereof need to be integrally hoisted to a test site according to the field condition, so that the problems of bearing and deformation of the cavity and the support in the hoisting process are further considered; these problems cause that the existing support structure can not be suitable for assembling, adjusting and hoisting the ultra-long four-wing type radio frequency quadrupole field cavity.

Disclosure of Invention

The invention provides a four-wing type radio frequency quadrupole field accelerator cavity mounting platform and an assembling method thereof, wherein the assembling platform is compact in structure, a main welding underframe and a detachable auxiliary welding underframe are fully utilized, all accelerator cavities are mounted on a linear guide rail with higher precision in a limited space, upper and lower layers of adjusting mechanisms (a worm and gear adjusting component and a three-dimensional adjustable component) are utilized to carry out rough adjustment and fine adjustment on the accelerator cavities in the beam height direction, and the adjusting precision and the adjusting efficiency of the installation of the accelerator cavities are improved.

In order to achieve the purpose, the invention adopts the following technical scheme:

a four-wing type radio frequency quadrupole field accelerator cavity mounting platform comprises the following components:

the main welding chassis is provided with two linear guide rails, the linear guide rails are provided with a plurality of sliding blocks, and a plurality of side wing plates are arranged at intervals and uniformly on two sides in the length direction of the main welding chassis;

the worm and gear adjusting assemblies are arranged below the side wing plates and are configured to adjust the up-down position of the main welding underframe, and the bottom adjusting devices are configured to adjust the left-right position of the main welding underframe;

three-dimensional adjustable subassembly, quantity is a plurality of, including slide rail platform, bracket component and fine setting subassembly, the slide rail platform assemble in on the slider, the bracket component removes the assembly slide rail bench, the assembly of fine setting subassembly is in on the bracket component, the bracket component is configured to the position about the adjustment accelerator cavity, the fine setting subassembly is configured to the upper and lower position of adjustment accelerator cavity.

Four wing type radio frequency quadrupole accelerator cavity mounting platforms, preferably, worm gear adjusting part still includes top backup pad and lifts the bulb, be provided with on the lower terminal surface of top backup pad with lift bulb looks butt's concave spherical surface, lift the bulb with lift jack fastening connects.

The four-wing type radio frequency quadrupole field accelerator cavity mounting platform, preferably, the bottom adjusting device includes bottom base welding case, be equipped with first roller apron of crouching, first roller retaining frame, second crouching on the vertical direction in the bottom base welding case from top to bottom in proper order and cover board, second crouch roller retaining frame and crouch roller loading board, first crouch roller retaining frame with the roller that crouches that is equipped with cross arrangement in the second crouches roller retaining frame, crouch the roller and be configured to adjust the horizontal position of main welding chassis.

Four wing type radio frequency quadrupole accelerator cavity mounting platform, preferably, bottom base welding incasement still is equipped with the side roller, the side roller passes through the side roller fixed plate to be fixed bottom base welding incasement, every lateral surface of bottom base welding case is equipped with welding adjusting screw the both sides of welding adjusting screw are equipped with two step shafts, step shaft one end is fixed on the side roller fixed plate, the other end is the free end, runs through the lateral wall of bottom base welding case.

Preferably, the three-dimensional adjustable assembly further comprises a sliding table heightening block and a tensioning screw rod, and the sliding rail table is assembled on the linear guide rail through the sliding rail table heightening block;

the bracket component includes by lower supreme supporting seat, bed hedgehopping piece, fine setting seat and the fine setting subassembly of assembling in proper order, the supporting seat slides the assembly and is in the slide rail bench, the bed hedgehopping piece fine setting seat and be provided with on the fine setting subassembly and hold tensioning screw's through-hole, the supporting seat is configured to the position of controlling of adjusting the accelerator cavity, the fine setting subassembly is configured to the upper and lower position of adjusting the accelerator cavity.

Four wing type radio frequency quadrupole field accelerator cavity mounting platform, preferably, the fine setting subassembly includes that thrust ball bearing, fine setting internal thread cover and ring cover are in the outside fine setting external thread cover of fine setting internal thread cover, be provided with on the fine setting seat and hold thrust ball bearing's step hole, thrust ball bearing ring cover is in on the straining screw.

The four-wing type radio frequency quadrupole field accelerator cavity mounting platform preferably further comprises an auxiliary welding underframe, the auxiliary welding underframe is detachably connected with the main welding underframe through a guide rail, an adjusting part is assembled on the auxiliary welding underframe, and the adjusting part is configured to adjust the flatness of the main welding underframe and the auxiliary welding underframe.

Four wing type radio frequency quadrupole accelerator cavity mounting platforms, preferably, still include hoist and mount welding roof-rack, hoist and mount welding roof-rack through a plurality of hoist and mount screw rods with main welding chassis can dismantle the connection hoist and mount welding roof-rack with the head and the tail both ends of main welding chassis are equipped with tip protection gusset to form a rigid hoist and mount frame.

The four-wing type radio frequency quadrupole field accelerator cavity mounting platform is characterized in that a flexible protection plate is preferably arranged between the end protection rib plate and the accelerator cavity inlet and outlet end plate so as to prevent the accelerator cavity from being damaged in the hoisting process.

Based on the four-wing radio frequency quadrupole accelerator cavity mounting platform, the invention also provides an assembly method of the mounting platform, which comprises the following steps:

placing a plurality of worm and gear adjusting assemblies at positions planned in advance, assembling the main welding underframe above the worm and gear adjusting assemblies, adjusting the worm and gear adjusting assemblies to enable the installation size of the main welding underframe to meet the requirements, and assembling the three-dimensional adjustable assemblies of each section of accelerator cavity on the sliding block;

placing the auxiliary welding underframe at the tail end of the main welding underframe, and adjusting the adjusting part at the bottom of the auxiliary welding underframe to ensure that the guide rail of the auxiliary welding underframe is assembled on the guide rail surface of the main welding underframe and ensure that the sliding block slides without obstacle;

sequentially assembling the accelerator cavities at all sections above the three-dimensional adjustable assembly, sliding the tail end accelerator cavity and the three-dimensional adjustable assembly matched with the tail end accelerator cavity to the upper part of the auxiliary welding underframe, and reserving a certain space between the accelerator cavities at all sections; then assembling positioning pins and sealing rings among the accelerator cavities, adjusting the position size of each accelerator cavity, assembling each positioning pin, and fixing screws on stainless steel jackets at two end faces of the accelerator cavity;

and hoisting the welding top frame, sequentially assembling the hoisting screw rods and the end protection rib plates at two ends, assembling the hoisting screw rods in hoisting holes at two sides of the main welding bottom frame, assembling the protection plates at the head and tail parts of the accelerator cavity, fastening the bottom parts of the end protection rib plates at the head and tail parts of the main welding bottom frame, adjusting the positions and fastening of the hoisting screw rods, and completing the assembly of the hoisting welding top frame.

Due to the adoption of the technical scheme, the invention has the following advantages:

1. the device has a compact structure, fully utilizes the main welding underframe and the detachable auxiliary welding underframe, installs all accelerator cavities on a linear guide rail with higher precision in a limited space, and utilizes the upper and lower layers of adjusting mechanisms to carry out rough adjustment and fine adjustment on the accelerator cavities in the beam height direction, thereby improving the adjusting precision and efficiency of the installation of the accelerator cavities; the main welding underframe, the hoisting welding top frame, the hoisting screw and the end protection rib plate form a rigid frame, so that the deformation of the accelerator cavity and the main welding underframe in the integral hoisting process is prevented, and the on-site hoisting requirement is met.

2. The installation platform adopts a full-length linear guide rail, has high assembly precision, a single-section accelerator cavity can move on the guide rail with small error, the upper layer and the lower layer are adjusted and consolidated to carry out coarse and fine adjustment on the height direction of the accelerator cavity, the assembly with small error between the accelerator cavities can be met, the requirement of the center alignment of the accelerator cavity is met, the alignment and assembly efficiency of the accelerator cavity is improved, the auxiliary welding underframe is connected and assembled with the main welding underframe, enough movement and assembly space can be met between the accelerator cavities, the length of the accelerator cavity adjustment platform is shortened, the field assembly requirement is met, the lifting welding top frame integrally lifts the accelerator cavity and the main welding underframe into the field, and the cavity assembly problem in a limited space is solved.

Drawings

Fig. 1 is a schematic overall structural diagram of a cavity mounting platform of a four-wing rf quadrupole field accelerator according to an embodiment of the present invention;

fig. 2 is a schematic overall structural diagram of the worm and gear adjustment assembly provided by the embodiment of the invention;

FIG. 3 is a top view of the wheel worm adjustment assembly provided by this embodiment of the present invention;

FIG. 4 is a sectional view taken in the direction H-H in FIG. 3;

fig. 5 is a schematic view of the overall structure of the hoisting welding top frame provided by the embodiment of the invention;

FIG. 6 is a schematic diagram of the overall structure of the three-dimensional adjustable assembly according to the embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a trimming assembly according to the embodiment of the present invention;

the respective symbols in the figure are as follows:

1-a first section of cavity; 2-a second end cavity; 3-main welding the chassis; 4-linear guide rail; 5-a slide block; 6-worm gear adjusting component; 7-a three-dimensional adjustable component; 8-auxiliary welding underframe; 9-hoisting and welding the top frame; 10-flank plate;

6-1 is a top support plate; 6-2 is a lifting ball head; 6-3 is a lifting jack; 6-4 is a bottom adjusting device;

6-4-1 is a top plate; 6-4-2 is a bottom base welding box; 6-4-3 is a welding box side cover; 6-4-4 is a side roller holding plate; 6-4-5 is a first horizontal roller cover plate; 6-4-6 is a first horizontal roller holding frame; 6-4-7 is a second horizontal roller cover plate; 6-4-8 is a horizontal roller bearing plate; 6-4-9 is a horizontal roller; 6-4-10 is a side roller; 6-4-11 is a step shaft; 6-4-12 is a step shaft support sleeve; 6-4-13 is a side roller fixing plate; 6-4-14 is a welding adjusting screw rod; 6-4-15 is a baseboard; 6-4-16 is a second horizontal roller holding frame;

7-1 is a slide rail platform; 7-2 is a slide rail table block; 7-3 is a supporting seat; 7-4 is a block with a raised pad; 7-5 is a fine adjustment seat; 7-6 are fine adjustment components; 7-7 are tensioning screw rods;

7-6-1 is a thrust ball bearing; 7-6-2 is a fine-tuning external thread sleeve; 7-6-3 is a fine-tuning internal thread sleeve; 7-6-4 is a bowl-shaped gasket group;

8-1 is an adjusting part; 8-2 is a secondary welding underframe guide rail;

9-1 is a hoisting screw; 9-2 is a hoisting plate; 9-3 is a hanging ring; 9-4 is an end part protection rib plate; 9-5 are protection plates.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the terms "first," "second," "third," "fourth," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

As shown in fig. 1, the present invention provides a four-wing rf quadrupole accelerator cavity mounting platform, which comprises the following components:

the main welding chassis 3 is provided with two linear guide rails 4, the linear guide rails 4 are provided with a plurality of sliding blocks 5, and a plurality of side wing plates 10 are arranged at intervals and uniformly on two sides of the main welding chassis 3 in the length direction;

the worm and gear adjusting assemblies 6 are provided in a plurality of numbers and comprise bottom adjusting devices 6-4 and lifting jacks 6-3 assembled on the bottom adjusting devices 6-4, the worm and gear adjusting assemblies 6 are assembled below the side wing plates 10, the lifting jacks 6-3 are configured to adjust the up-down position of the main welding underframe 3, and the bottom adjusting devices 6-4 are configured to adjust the left-right position of the main welding underframe 3; when the lifting jack 6-3 is adjusted, the axial inclination caused by the bearing capacity is automatically compensated, so that the automatic compensation device has larger automatic compensation capacity and is convenient for adjusting the main welding underframe 3;

the three-dimensional adjustable component 7 comprises a plurality of sliding rail tables 7-1, a support component and a fine adjustment component 7-6, wherein the sliding rail tables 7-1 are assembled on the sliding block 5, the support component is movably assembled on the sliding rail tables 7-1, the fine adjustment component 7-6 is assembled on the support component, the support component is configured to adjust the left and right positions of the accelerator cavity, and the fine adjustment component 7-6 is configured to adjust the up and down positions of the accelerator cavity.

In a preferred embodiment of the invention, the main welding underframe 3 is formed by welding carbon steel square pipes, failure treatment is carried out after welding to ensure that welding stress is released to the maximum extent, and then guide rail mounting surfaces on the upper surface are integrally machined to ensure the flatness and symmetry of the guide rail mounting surfaces on two sides.

In a preferred embodiment of the present invention, as shown in fig. 2-4, the worm and gear adjustment assembly 6 further comprises a top support plate 6-1 and a lifting ball 6-2, a concave spherical surface abutting against the lifting ball 6-2 is provided on the lower end surface of the top support plate 6-1, and the lifting ball 6-2 is tightly connected with the lifting jack 6-3. After the lifting ball head 6-2 is in threaded connection with the lifting jack 6-3, a threaded jackscrew is assembled on the side surface to fix the position of the lifting ball head 6-2; the lower bottom surface of the lifting jack 6-3 is fixed on a top plate 6-4-1 in the bottom adjusting device 6-4, and the welding adjusting screws 6-4-14 on four side surfaces in the bottom adjusting device 6-4 are adjusted to drive the top plate 6-4-1 and the lifting jack 6-3 to perform position adjustment in the corresponding direction, so that the supported main welding underframe 3 performs corresponding position adjustment.

In a preferred embodiment of the present invention, as shown in FIG. 4, the bottom adjusting means 6-4 comprises a bottom base weld box 6-4-2, a first horizontal roller cover plate 6-4-5 and a first horizontal roller holding frame 6-4-6 are installed in the bottom base weld box 6-4-2 in the vertical direction in this order from the top, the second horizontal roller cover plate 6-4-7, the second horizontal roller holding frame 6-4-16 and the horizontal roller bearing plate 6-4-8, the horizontal rollers 6-4-9 are arranged in a crossed manner in the first horizontal roller holding frame 6-4-6 and the second horizontal roller holding frame 6-4-16, and the horizontal rollers 6-4-9 are configured to adjust the horizontal position of the main welding underframe 3.

In a preferred embodiment of the present invention, as shown in fig. 4, the bottom base welding box 6-4-2 is further provided with side rollers 6-4-10 therein, the side rollers 6-4-10 are fixed in the bottom base welding box 6-4-2 by side roller fixing plates 6-4-13, each outer side surface of the bottom base welding box 6-4-2 is provided with a welding adjusting screw 6-4-14, two step shafts 6-4-11 are provided on both sides of the welding adjusting screw 6-4-14, one end of the step shaft 6-4-11 is fixed on the side roller fixing plate 6-4-13, and the other end is a free end and penetrates through the side wall of the bottom base welding box 6-4-2.

In a preferred embodiment of the present invention, as shown in fig. 6, the three-dimensional adjustable assembly 7 further comprises a sliding table heightening block 7-2 and a tightening screw 7-7, the tightening screw 7-7 is fixed with a jacket on the accelerator cavity, the bottom end passes through the fine adjustment seat 7-5, the heightening block 7-4 and is fixedly connected with the supporting seat 7-3, and the sliding table 7-1 is assembled on the linear guide rail 4 through the sliding table heightening block 7-2;

the support assembly comprises a support seat 7-3, a heightening block 7-4, a fine adjustment seat 7-5 and a fine adjustment assembly 7-6 which are sequentially assembled from bottom to top, the support seat 7-3 is slidably assembled on the slide rail table 7-1, through holes for accommodating the tensioning screws 7-7 are formed in the heightening block 7-4, the fine adjustment seat 7-5 and the fine adjustment assembly 7-6, the support seat 7-3 is configured to adjust the left and right positions of the accelerator cavity, and the fine adjustment assembly 7-6 is configured to adjust the up and down positions of the accelerator cavity. The height direction of the accelerator cavity can be adjusted by adjusting the fine adjustment component 7-6 on the three-dimensional adjustable component 7, the left and right directions of the accelerator cavity can be adjusted by adjusting the bolt on the side surface of the sliding rail table 7-1, 2 bracket components can be adjusted left and right by adjusting the bolt on the side surface of the sliding rail table 7-1, and therefore the purpose of adjusting the left and right positions of the accelerator cavity is achieved; after the left and right sizes of the accelerator cavity are adjusted in place, the connecting bolt between the support component and the slide rail table 7-1 is fastened, and the support component is completely fixed. The height of the heightening block 7-4 can be properly changed according to the beam center height of the accelerator cavity and the adjusting range of the fine adjusting component 7-6 so as to achieve the optimal size.

The upper part of the tensioning screw 7-7 is provided with a fine adjustment component 7-6, the fine adjustment component 7-6 is placed in a step hole of a fine adjustment seat 7-5, the adjustment in the height direction of the accelerator cavity is adjusted by fitting the fine adjustment components 7-6 with each other, and the tensioning screw 7-7 is fastened through a nut after the adjustment of the height of the accelerator cavity is completed so as to completely fix the accelerator cavity.

Fine threads are adopted in the fine adjustment internal thread sleeve 7-6-3 and the fine adjustment external thread sleeve 7-6-2 in the fine adjustment component 7-6, so that the adjustment precision can be improved, and the friction force in mutual fitting of the threads can be reduced by plating a solid lubricating material on the fitting surface; the bottom is provided with the thrust ball bearing 7-6-1, and the top is provided with the bowl-shaped gasket group 7-6-4, so that the error influence in the mutual fitting process can be reduced, and the height position adjustment precision of the accelerator cavity is further improved.

In a preferred embodiment of the present invention, as shown in fig. 7, the fine adjustment assembly 7-6 comprises a thrust ball bearing 7-6-1, a fine adjustment female screw sleeve 7-6-3, and a fine adjustment male screw sleeve (7-6-2) sleeved outside the fine adjustment female screw sleeve 7-6-3, a fine adjustment seat 7-5 is provided with a stepped hole for accommodating the thrust ball bearing 7-6-1, and the thrust ball bearing 7-6-1 is sleeved on the tightening screw 7-7.

In a preferred embodiment of the present invention, as shown in fig. 1, a secondary welding chassis 8 is further included, the secondary welding chassis 8 is detachably connected with the primary welding chassis 3 through a guide rail, an adjusting member 8-1 is mounted on the secondary welding chassis 8, and the adjusting member 8-1 is configured to adjust the flatness of the primary welding chassis 3 and the secondary welding chassis 8. The detachable auxiliary welding underframe 8 is assembled at the tail part of the main welding underframe 3, so that the problem that the tail end cavity cannot be installed on the adjusting platform due to the spatial position of the main welding underframe 3 can be solved. After the end accelerator cavity is mounted to the primary welding chassis 3, the secondary welding chassis 8 may be removed.

In a preferred embodiment of the present invention, as shown in fig. 1 and 5, the present invention further comprises a hoisting welding top frame 9, the hoisting welding top frame 9 is detachably connected with the main welding bottom frame 3 through a plurality of hoisting screws 9-2, and end protection rib plates 9-4 are assembled at the head and tail ends of the hoisting welding top frame 9 and the main welding bottom frame 3 to form a rigid hoisting frame.

In a preferred embodiment of the invention, as shown in fig. 1 and 5, a flexible protective plate 9-5 is arranged between the end protective rib plate 9-4 and the inlet and outlet end plate of the accelerator cavity to prevent the accelerator cavity from being damaged during hoisting.

Based on the four-wing radio frequency quadrupole accelerator cavity mounting platform, the invention also provides an assembly method of the mounting platform, which comprises the following steps:

assembling a main welding underframe 3 and a worm and gear adjusting assembly 6, adjusting the main welding underframe 3 to a required size height by adjusting the worm and gear adjusting assembly 6, ensuring the horizontal size precision of the main welding underframe 3, assembling a linear guide rail 4 and a sliding block 5 on the main welding underframe 3, and assembling a sliding table heightening block 7-2 on the sliding block 5;

assembling a sliding rail table 7-1 on 4 sliding rail table heightening blocks 7-2, adjusting the size of the sliding rail table heightening blocks to be connected with a sliding block 5, then assembling positioning pin holes between the sliding rail table heightening block 7-3 and the sliding rail table 7-1 and positioning pins, then assembling 2 supporting seats 7-3 on the sliding rail table 7-1, assembling 4 heightening blocks 7-4 and 4 fine adjusting seats 7-5 on the 2 supporting seats 7-3, adjusting the size of the sliding rail table heightening blocks to ensure that the center distance of the 4 fine adjusting seats 7-5 is consistent with the distance of connecting screw holes on an accelerator cavity stainless steel jacket, drilling positioning pin holes and installing positioning pins; then 4 fine adjustment assemblies 7-6 and 4 tensioning screws 7-7 are sequentially assembled on 4 fine adjustment seats 7-5, and a plurality of sections of three-dimensional adjustable assemblies 7 of the accelerator cavity are sequentially assembled after the three-dimensional adjustable assemblies 7 of the single-section cavity are assembled;

placing an auxiliary welding underframe 8 at the tail end of a main welding underframe 3, adjusting the height of the auxiliary welding underframe 8, placing a guide rail of the auxiliary welding underframe 8 on a guide rail mounting surface on the main welding underframe 3, adjusting the size of the guide rail, installing a bolt to fix the guide rail, fixing an adjusting part 8-1 at the bottom of the auxiliary welding underframe 8 to the ground, pushing a three-dimensional adjustable component 7 of an assembled tail-end accelerator cavity, determining that the three-dimensional adjustable component 7 can slide on the guide rail without barriers forwards and backwards, and connecting and fixing the auxiliary welding underframe 8 and the main welding underframe (3);

4) after the single-section accelerator is hoisted into the site, disassembling a tensioning screw 7-7 in a three-dimensional adjustable component 7, then assembling the tensioning screw 7-7 in a stainless steel jacket mounting hole at the bottom of an accelerator cavity, moving the accelerator cavity to the position above the three-dimensional adjustable component 7, slowly descending the tensioning screw 7-7, loading the tensioning screw 7-7 into a through hole of a fine adjustment seat 7-5 and a fine adjustment component 7-6, connecting and fixing the bottom of the tensioning screw 7-7 with a support seat 7-3, and loading the accelerator cavity into an adjustment platform;

detecting a coordinate difference value between the center of an accelerator cavity and a control network by using a laser tracker, sliding a three-dimensional adjustable component 7 of a first section of the accelerator cavity to the position of the first section of the cavity 1 on a guide rail, adjusting four adjusting bolts on the side surface of a slide rail table 7-1, adjusting the left and right direction size of the accelerator cavity to be consistent with the beam center, adjusting a fine adjustment component 7-6 in the three-dimensional adjustable component 7, adjusting the height direction size of the accelerator cavity to be consistent with the beam center size, fastening bolts at the bottom of a supporting seat 7-3, and fixing the position of the first section of the cavity 1;

sequentially pushing the subsequent accelerator cavities, adjusting according to the adjustment sequence to ensure that the centers of the accelerator cavities are matched with the beam center, installing a high-frequency contact ring, a vacuum seal ring and a positioning pin on the end face of each accelerator cavity, connecting and fastening the mutually connected accelerator cavities by using bolts, and finishing the assembly on the adjustment platform of all the accelerator cavities;

after the connection of the accelerator cavity is completed, the tail auxiliary welding underframe 8 is dismantled, a rubber protection plate and a G10 protection plate are arranged at the head and tail parts of the accelerator cavity, the hoisting welding top frame 9 is hoisted, hoisting screws 9-1 are arranged at two sides, end protection rib plates 9-4 are assembled at the head and tail parts, the assembled hoisting welding top frame 9 is hoisted to the upper part of the accelerator cavity, the hoisting welding top frame is slowly put down, the hoisting screws 9-1 are inserted into through holes in the side surface of the main welding underframe 3, the end protection rib plates 9-4 are connected to the head and tail parts of the main welding underframe 3, all connected nuts are fastened, and the hoisting welding top frame 9 is fixed above the cavity;

and (3) loading a lifting rope into a lifting ring 9-4 at the top of a lifting welding top frame 9, lifting the whole equipment by matching with a crown block, and integrally lifting the accelerator cavity and the adjusting platform to a specified position.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.