Accelerator cavity device assembly tool and method for free electron laser device

Abstract

The present invention discloses an accelerator cavity device assembly tool and method for a free electron laser device, the tool comprising an upstream cavity adjustment bracket, a downstream cavity adjustment bracket and a rotation adjustment bracket. The method comprises the steps of coarsely adjusting the segment cavity of the accelerator cavity device in the X, Y and Z directions and finely adjusting the segment cavity in the Y and Z directions by means of the upstream cavity adjustment bracket and the downstream cavity adjustment bracket, so that the segment cavity meets the installation accuracy requirements in the horizontal and height directions; adjusting the angular position of the segment cavity of the accelerator cavity device by means of the rotation fine adjustment bracket, so that the segment cavity meets the installation accuracy requirements in the angular position. The present invention can meet the installation accuracy requirements when assembled in a clean room.

Description

Technical Field

[0001] The invention relates to a special tool, in particular to an accelerator cavity device assembly tool and method for a free electron laser device. Background Art

[0002] The wavelength of X-rays ranges from 0.001 to 10 nm, between ultraviolet rays and gamma rays. Wavelengths above 0.1 nm are called soft X-rays, and wavelengths between 0.01 nm and 0.1 nm are called hard X-rays. Free electron laser (FEL) is currently the most advanced X-ray source. Free electron laser is coherent light generated by free electrons. Free electron laser is the only experimental device in the world that can simultaneously meet the time and space scales required for studying processes at the atomic or molecular scale. It provides unprecedented high-resolution imaging, advanced structural analysis, ultrafast process exploration and other cutting-edge research methods for multiple disciplines such as physics, chemistry, life sciences, materials science, and energy science. The hard X-ray free electron laser device consists of three parts: accelerator, undulator and beamline station system. Among them, the accelerator is a low-temperature superconducting module, and its main component is the accelerator cavity device, which includes the connected upstream valve, cavity string, low-temperature monitoring chamber and downstream valve in the order of upstream and downstream. The cavity string is composed of multiple node cavities, and the multiple node cavities need to be connected through bellows in the order of upstream and downstream. Wherein the upstream valve is connected to the adjacent section cavity through a bellows, and the downstream valve is connected to the adjacent section cavity through a vacuum tube and a bellows, and a low-temperature monitoring chamber is provided on the vacuum tube for monitoring the electron beam passing through the accelerator cavity device. Since the accelerator cavity device is a low-temperature superconducting module, it needs to be assembled in a clean room, and the upstream valve, cavity string, low-temperature monitoring chamber and downstream valve need to remain coaxial, so the installation position and assembly accuracy of the upstream valve, cavity string, low-temperature monitoring chamber and downstream valve are required to be high. Therefore, how to effectively solve the accuracy problem that needs to be achieved when the accelerator cavity device is assembled in the clean room has become a technical problem that needs to be solved urgently in this field. Secondly, it is particularly important to maintain the required installation position and accuracy of the rotation angle of each section cavity, so how to solve the position adjustment of the rotation angle of the section cavity of the accelerator cavity device and achieve the accuracy requirements has become a technical problem that needs to be solved urgently in this field. Again, a cold end is provided in the radial direction of the downstream end of each section cavity, and a coupler is connected to the cold end. After the coupler is installed, it may be affected by environmental influences such as vibration and become loose with the cold end. Therefore, how to solve the problem of maintaining the stable connection between the coupler and the cold end has become a technical problem that urgently needs to be solved in this field. In particular, the coaxiality installation position and accuracy of the coupler connected to the cold end of the section cavity are particularly important. Therefore, how to solve the installation of the coupler of the accelerator cavity device and meet the accuracy requirements has become a technical problem that urgently needs to be solved in this field. Finally, a high installation accuracy needs to be maintained in the X direction between the section cavities of the cavity string, between the section cavity and the low-temperature monitoring chamber, and between the valve and the section cavity. Therefore, how to solve the installation position and accuracy requirements in the X direction between the section cavities, between the section cavity and the low-temperature monitoring chamber, and between the upstream valve and the section cavity when assembling in the clean room has become a technical problem that urgently needs to be solved in this field. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an assembly tool and method for an accelerator cavity device of a free electron laser device, so as to solve the problem of achieving installation accuracy when the accelerator cavity device of the free electron laser device is assembled in a clean room.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: an accelerator cavity device assembly tool for a free electron laser device, comprising: an upstream cavity adjustment bracket, a downstream cavity adjustment bracket and a rotation adjustment bracket;

[0005] The upstream cavity adjustment bracket and the downstream cavity adjustment bracket both include a universal pillar and a support plate located on the universal pillar; the universal pillar includes a pillar chassis, a pillar tube vertically connected to the pillar chassis, the pillar tube is threadedly connected to an axial adjustment screw extending into the pillar tube through a flange, the axial adjustment screw is threadedly connected to an axial locking nut located above the flange, the axial adjustment screw is connected to a U-shaped bracket through a nut, a bearing plate is arranged on the U-shaped bracket, and bearing plates are arranged on both sides of the bearing plate Side plate, the bearing side plate is provided with a Y-direction fine-tuning screw for fine-tuning the position of the support plate in the Y direction; the support plate includes a horizontal plate and a vertical plate vertically connected to the horizontal plate, the vertical plate is provided with a lower semicircular arc groove, the horizontal plate is threadedly connected to the bearing threaded hole of the bearing plate through a fixing bolt and an adjusting washer thereon, the horizontal plate is also threadedly connected with a Z-direction fine-tuning screw and abuts against the upper surface of the bearing plate; the Y-direction fine-tuning screw abuts against the side walls of the horizontal plate or the vertical plate at both ends of the Y direction, and is used to fine-tune the position of the support plate 111 in the Y direction;

[0006] The rotation angle fine-tuning bracket includes a rotating frame chassis, a rotating frame pillar vertically connected to the rotating frame chassis, a flat plate vertically arranged on the rotating frame pillar, and vertical plates arranged at both ends of the flat plate in the Y direction. The distance between the two vertical plates in the Y direction is greater than or equal to the diameter of the section cavity of the accelerator cavity device. The vertical plate is sequentially provided with a first through hole and a second through hole from top to bottom. The two ends of the vertical plate in the X direction are provided with hanging ear fixing bolts passing through the first through holes to fix the hanging ears of the section cavity of the accelerator cavity device at both ends in the X direction. The two ends of the vertical plate in the Z direction are provided with angle adjustment bolts passing through the first through holes to fix the hanging ears of the section cavity of the accelerator cavity device at both ends in the Z direction.

[0007] Furthermore, in the accelerator cavity device assembly tool of the free electron laser device provided by the present invention, in the downstream cavity adjustment bracket, the lower half-circumference arc-shaped groove matching along the downstream end is provided with an arc-shaped convex rib.

[0008] Furthermore, in the accelerator cavity device assembly tool for the free electron laser device provided by the present invention, in the through pillar, the column tube is provided with a radial locking screw in the radial direction which extends into the column tube and is used to lock the lower smooth surface section of the axial adjustment screw.

[0009] Furthermore, the accelerator cavity device assembly tool of the free electron laser device provided by the present invention further comprises:

[0010] A monitoring and adjusting bracket, wherein the monitoring and adjusting bracket has the same structure as the upstream cavity adjusting bracket, and the arc-shaped groove in the lower half of the circle matches the low-temperature monitoring chamber of the accelerator cavity device.

[0011] Furthermore, the accelerator cavity device assembly tool of the free electron laser device provided by the present invention further comprises:

[0012] The valve adjustment bracket includes: a valve base, a valve support vertically connected to the valve base, a valve top plate vertically connected to the upper end of the valve support, the valve top plate is connected to the valve slide via a slide bolt and a slide adjustment gasket thereon, threaded holes are arranged on the valve top plate at positions corresponding to the slide bolts, horizontal adjustment holes are arranged on the valve slide at positions corresponding to the slide bolts, valve X-direction side plates are arranged at both ends of the valve slide in the X direction, valve X-direction horizontal fine-tuning bolts are arranged on the valve X-direction side plates, the opposite ends of the screw heads of the valve X-direction horizontal fine-tuning bolts are abutted against the side walls of the valve top plate, the valve slide is connected to a valve support plate via a valve Z-direction fine-tuning bolt, and the valve support plate is provided with valve bolts for fixing the valve of an accelerator cavity device.

[0013] Furthermore, in the accelerator cavity device assembly tool of the free electron laser device provided by the present invention, in the valve adjustment bracket, there are two valve Z-direction fine-tuning bolts, which are distributed at both ends of the valve slide in the Y direction; or there are four valve Z-direction fine-tuning bolts, which are distributed at the corners of the valve slide; valve Y-direction side plates are provided at both ends of the valve slide in the Y direction, and valve Y-direction horizontal fine-tuning bolts are provided on the valve Y-direction side plates, and the opposite ends of the screw heads of the valve Y-direction horizontal fine-tuning bolts are against the side walls of the valve top plate.

[0014] Furthermore, the accelerator cavity device assembly tool of the free electron laser device provided by the present invention further comprises:

[0015] A base, the base comprising:

[0016] A section cavity bottom plate assembly connected between the upstream cavity adjustment bracket and the downstream cavity adjustment bracket in the same section cavity;

[0017] The section cavity bottom plate assembly comprises:

[0018] An upstream cavity bottom plate is arranged on an upstream cavity adjustment bracket of the section cavity body;

[0019] A downstream cavity bottom plate is arranged on a downstream cavity adjustment bracket of the section cavity body;

[0020] A fixing strip is connected between the upstream cavity bottom plate and the downstream cavity bottom plate.

[0021] Furthermore, in the accelerator cavity device assembly tooling of the free electron laser device provided by the present invention, the base also includes a monitoring bottom plate and a valve bottom plate, the valve bottom plate includes an upstream valve bottom plate arranged on the upstream cavity bracket and a downstream valve bottom plate arranged on the downstream cavity bracket, the monitoring bottom plate is arranged on the monitoring adjustment bracket, and the monitoring bottom plate and the downstream valve bottom plate are connected by a fixing strip.

[0022] Furthermore, in the assembly tooling of the accelerator cavity device of the free electron laser device provided by the present invention, the upstream cavity adjustment bracket is adjustably arranged on the upstream cavity bottom plate along the Y direction by means of a chassis bolt passing through the Y-direction adjustment hole of the support chassis provided on the support chassis; the downstream cavity adjustment bracket is adjustably arranged on the downstream cavity bottom plate along the Y direction by means of a chassis bolt passing through the Y-direction adjustment hole of the support chassis provided on the support chassis; the monitoring adjustment bracket is adjustably arranged on the monitoring bottom plate along the Y direction by means of a chassis bolt passing through the Y-direction adjustment hole of the support chassis provided on the support chassis; the rotation angle fine-tuning bracket is adjustably arranged on the rotating frame bottom plate along the Y direction by means of a disk bolt passing through the Y-direction adjustment hole of the rotating frame chassis provided on the rotating frame chassis; the valve adjustment bracket is adjustably arranged on the upstream valve bottom plate and the downstream valve bottom plate respectively along the Y direction by means of a chassis fixing bolt passing through the Y-direction adjustment hole of the valve bottom plate provided on the valve bottom plate.

[0023] Furthermore, in the accelerator cavity device assembly tooling of the free electron laser device provided by the present invention, a bottom plate regulator is provided between adjacent cavity bottom plate assemblies, between the upstream valve bottom plate and the cavity bottom plate assembly, and / or between the cavity bottom plate assembly and the monitoring bottom plate.

[0024] Furthermore, in the accelerator cavity device assembly tool of the free electron laser device provided by the present invention, the base plate adjuster includes two fixedly arranged sockets, a base plate adjusting bolt arranged between the two sockets, and a base plate adjusting nut threadedly connected to the base plate adjusting bolt and distributed on both sides of the sockets; or the base plate adjuster includes two fixedly arranged sockets, a base plate adjusting nut, a first screw, a second screw and a tension joint, the thread directions of the first screw and the second screw are opposite, one end of the first screw is fixed to both sides of one of the sockets through the two base plate adjusting nuts, and the other end of the first screw is threadedly connected to the tension joint; one end of the second screw is fixed to both sides of the other socket through the two base plate adjusting nuts, and the other end of the second screw is threadedly connected to the tension joint.

[0025] Furthermore, in the accelerator cavity device assembly tooling of the free electron laser device provided by the present invention, a track platform for movement in the X direction is arranged under the base, and a track locker for locking or unlocking the track platform is arranged on the base; the track locker includes a pressure seat, a pressure hand hinged on the pressure seat, and a connecting rod, and a pressure rod is vertically arranged on the connecting rod.

[0026] Furthermore, the accelerator cavity device assembly tool of the free electron laser device provided by the present invention further comprises:

[0027] A cavity distance controller is arranged between the downstream cavity adjustment bracket and the upstream cavity adjustment bracket at the connection between adjacent cavity sections, between the valve adjustment bracket of the upstream valve and the upstream cavity adjustment bracket, and / or between the downstream cavity adjustment bracket and the monitoring adjustment bracket.

[0028] Furthermore, in the accelerator cavity device assembly tool of the free electron laser device provided by the present invention, the cavity distance controller comprises: a first fixture and a second fixture adjustably connected to the first fixture along the X direction;

[0029] The first fixture comprises a first fixture head having a first fixture head groove and a first fixture waist having a first fixture waist groove, the first fixture head and the first fixture waist are connected to a common support column of one of the adjustment brackets through a first fastener arranged along the X direction, and a first avoidance groove for avoiding the first fastener is arranged on the first fixture waist along the Y direction;

[0030] The second fixture comprises a second fixture head having a second fixture head groove and a second fixture waist having a second fixture waist groove, the second fixture head and the second fixture waist are connected to a universal support column of another adjustment bracket through a second fastener arranged along the X direction, and a second avoidance groove for avoiding the second fastener is arranged on the second fixture waist along the Y direction;

[0031] The first fixture waist and the second fixture waist are adjustably connected along the X direction via a third fastener arranged along the Z direction.

[0032] Furthermore, the accelerator cavity device assembly tool of the free electron laser device provided by the present invention further comprises:

[0033] The coupler mounting bracket comprises a bracket chassis, a bracket column, a height adjustment mechanism and a horizontal adjustment mechanism which are arranged in sequence, and a large flange fixture for mounting the coupler and a small flange fixture with adjustable height which are arranged on the horizontal adjustment mechanism.

[0034] Furthermore, in the accelerator cavity device assembly tool for the free electron laser device provided by the present invention, in the coupler mounting bracket, the height adjustment mechanism includes a lower adjustment plate arranged on the bracket column, and the lower adjustment plate is connected to the upper adjustment plate through a height adjustment bolt; and / or in the coupler mounting bracket, the horizontal adjustment mechanism includes a fixed plate arranged on the height adjustment mechanism through a plate adjustment bolt, and the fixed plate is provided with a slide plate which moves relative to the fixed plate in the Y direction; and a guide side plate is provided on the side wall of the fixed plate, and the guide side plate is threadedly connected in the X direction or abuts against the fixed plate through an X-direction adjustment bolt.

[0035] Furthermore, in the accelerator cavity device assembly tool for the free electron laser device provided by the present invention, in the coupler mounting bracket, the fixed plate is provided with at least two parallel guide rails in the Y direction, and the slide plate is provided with a slide groove matching the guide rails; or in the coupler mounting bracket, the fixed plate is provided with at least two parallel guide wheels in the Y direction, and the slide plate is provided with a slide groove matching the guide wheels.

[0036] Furthermore, in the accelerator cavity device assembly tool of the free electron laser device provided by the present invention, in the coupler mounting bracket, the large flange clamp includes a lower clamp having a lower clamp fixedly connected to the slide plate, and an upper clamp having an upper clamp connected to the lower clamp by clamp bolts, the upper clamp of the upper clamp and the lower clamp of the lower clamp are used to fix the large flange of the coupler; and / or in the coupler mounting bracket, the small flange clamp includes a Z-shaped plate arranged on the horizontal adjustment mechanism, the Z-shaped plate is adjustably connected to a small flange supporting plate in the Z direction by a small flange adjustment rod, and the small flange supporting plate is provided with a groove for supporting the small flange of the coupler.

[0037] Furthermore, in the accelerator cavity device assembly tool of the free electron laser device provided by the present invention, in the coupler mounting bracket, the fixed plate is provided with a Y-direction limiting mechanism along the Y-direction for limiting the moving position of the slide plate, the Y-direction limiting mechanism includes a limiting block provided on the fixed plate, a Y-direction limiting bolt is provided through the limiting block in the Y-direction, the Y-direction limiting bolt is threadedly connected to or abuts against the slide plate; and / or the coupler mounting bracket also includes a Z-direction limiting mechanism, the Z-direction limiting mechanism includes a Z-direction limiting bolt that vertically passes through the slide plate and is threadedly connected to or abuts against the fixed plate.

[0038] Furthermore, in the accelerator cavity device assembly tool for the free electron laser device provided by the present invention, the coupler mounting bracket also includes a lock vertically arranged on the bracket column, the lock includes a first lock plate, and a second lock plate connected to the first lock plate through a lock plate bolt, the first lock plate and the second lock plate are respectively provided with grooves for fixing on the column.

[0039] Furthermore, the accelerator cavity device assembly tool of the free electron laser device provided by the present invention further comprises:

[0040] A coupler locking device comprises a lower truss and an upper truss arranged in parallel along the Y direction, wherein the lower truss is provided with vertical bolts for fixing the coupler in the radial direction, and the vertical bolts include a first vertical bolt for fixing the small flange of the coupler in the radial direction and a second vertical bolt for fixing the large flange of the coupler in the radial direction; an end plate is arranged perpendicular to the upper truss, and the end plate is provided with transverse bolts for fixing the large flange of the coupler in the axial direction.

[0041] Furthermore, in the accelerator cavity device assembly tool for the free electron laser device provided by the present invention, in the coupler locking device, the lower truss is provided with lower waist-shaped holes that pass through the first vertical bolt and the second vertical bolt respectively, and the end plate of the upper truss is provided with upper waist-shaped holes that pass through the transverse bolts, and the lower waist-shaped holes and the upper waist-shaped holes are distributed along the X direction.

[0042] In order to solve the above technical problems, the present invention further provides a technical solution: a method for assembling an accelerator cavity device of a free electron laser device, using the accelerator cavity device assembly tooling of the free electron laser device as described above;

[0043] The horizontality and height of the section cavity are adjusted by the upstream cavity adjustment bracket and the downstream cavity adjustment bracket, so that the axis centers of the multiple section cavities reach coaxiality;

[0044] The rotation angle of each section cavity is adjusted by rotating the angle fine-tuning bracket so that the angle of each section cavity meets the position requirement;

[0045] Adjacent section cavities are assembled through bellows to form a cavity string.

[0046] Furthermore, the accelerator cavity device assembly method of the free electron laser device provided by the present invention adjusts the horizontality and height of the vacuum tube in the low-temperature monitoring chamber by means of a monitoring adjustment bracket, so as to adjust the axis center of the vacuum tube to be coaxial with the axis center of the above-mentioned cavity string, so as to assemble the cavity string with the vacuum tube and the low-temperature monitoring chamber sleeved on the vacuum tube through a bellows; the upstream valve and the downstream valve are fixedly connected by means of a valve adjustment bracket respectively, and the horizontality and height of the valve are adjusted by means of the valve adjustment bracket, so as to make the axis center of the upstream valve and the downstream valve coaxial with the axis center of the above-mentioned cavity string, so as to assemble the upstream valve with the cavity string through the bellows, and assemble the downstream valve with the vacuum tube and the low-temperature monitoring chamber sleeved on the vacuum tube;

[0047] Furthermore, the accelerator cavity device assembly method of the free electron laser device provided by the present invention comprises installing the coupler on the cold end of the cavity section by means of a coupler mounting bracket to complete the assembly of the coupler; removing the coupler mounting bracket and locking and fixing the coupler on the cold end of the cavity section by means of a coupler locking device.

[0048] Compared with the prior art, the accelerator cavity device assembly tool and method of the free electron laser device provided by the present invention can make coarse adjustments to the segment cavity of the accelerator cavity device in the X, Y, and Z directions and fine adjustments in the Y and Z directions through the upstream cavity adjustment bracket and the downstream cavity adjustment bracket, so that the segment cavity meets the installation accuracy requirements in the horizontal and height directions. The angular position of the segment cavity of the accelerator cavity device is adjusted by rotating the fine adjustment bracket, so that the segment cavity meets the installation accuracy requirements of the angular position. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a three-dimensional structural schematic diagram of an accelerator cavity device assembly tool in an installed state according to an embodiment of the present invention;

[0050] Figures 2 to 3 yes Figure 1 A schematic diagram of a partial three-dimensional structure of the accelerator cavity device assembly tool in an installed state;

[0051] Figure 4 It is a three-dimensional structural schematic diagram of the main structure of the accelerator cavity device assembly tooling according to one embodiment of the present invention;

[0052] Figure 5 to Figure 6 yes Figure 4 A schematic diagram of the partial three-dimensional structure of the main structure of the assembly tooling of the medium accelerator cavity device;

[0053] Figure 7 It is a schematic diagram of the three-dimensional structure of a valve adjustment bracket according to an embodiment of the present invention;

[0054] Figure 8 is a schematic diagram of the three-dimensional structure of a valve adjustment bracket according to another embodiment of the present invention;

[0055] Fig. 9 is a schematic diagram of the three-dimensional structure of the upstream cavity adjustment bracket according to an embodiment of the present invention;

[0056] Fig.10 is a schematic diagram of the three-dimensional structure of the downstream cavity adjustment bracket according to an embodiment of the present invention;

[0057] Fig.11 is a schematic diagram of the three-dimensional structure of the monitoring and adjusting bracket according to an embodiment of the present invention;

[0058] Fig.12 is a schematic diagram of the three-dimensional structure of a universal support column according to an embodiment of the present invention;

[0059] Fig.13 is a schematic diagram of the main structure of a universal support according to an embodiment of the present invention;

[0060] Fig.14 is a schematic side structural view of a universal support according to an embodiment of the present invention;

[0061] Fig.15 yes Fig.14 Sectional view along the middle line AA;

[0062] Fig.16 is a schematic cross-sectional structure diagram of an axial adjustment screw of a universal support according to an embodiment of the present invention;

[0063] Fig.17 is a schematic cross-sectional structure diagram of a flange of a universal support according to an embodiment of the present invention;

[0064] Fig.18 is a schematic diagram of the three-dimensional structure of a rotation angle fine-tuning bracket according to an embodiment of the present invention;

[0065] Fig.19 is a schematic diagram of the main structure of the rotation angle fine-tuning bracket according to an embodiment of the present invention;

[0066] Fig. 20 is a schematic side view of the structure of a rotation angle fine-tuning bracket according to an embodiment of the present invention;

[0067] Fig.21 It is a three-dimensional structural schematic diagram of the rotating angle fine-tuning bracket of the embodiment of the invention in the state of being used in the segment cavity;

[0068] Figure 22 to Figure 23 is a schematic diagram of the three-dimensional structure of a coupler mounting bracket according to an embodiment of the present invention;

[0069] Fig.24 is a schematic diagram of the main structure of a coupler mounting bracket according to an embodiment of the present invention;

[0070] Fig.25 is a schematic side structural diagram of a coupler mounting bracket according to an embodiment of the present invention;

[0071] Fig.26 is a schematic diagram of a top view of the structure of a coupler mounting bracket according to an embodiment of the present invention;

[0072] Fig. 27 is a three-dimensional structural schematic diagram of a coupler mounting bracket in use state according to an embodiment of the present invention;

[0073] Fig.28 is a schematic diagram of the three-dimensional structure of a coupler locking device according to an embodiment of the present invention;

[0074] Fig.29 is a schematic diagram of the front view structure of a coupler locking device according to an embodiment of the present invention;

[0075] Fig.30 is a three-dimensional structural schematic diagram of a coupler locking device in use state according to an embodiment of the present invention;

[0076] Fig.31 is a schematic diagram of the three-dimensional structure of a cavity distance controller according to an embodiment of the present invention;

[0077] Fig.32 is a schematic diagram of the main structure of a cavity distance controller according to an embodiment of the present invention;

[0078] Fig.33 It is a schematic diagram of the three-dimensional structure of the first fixture of the cavity distance controller according to an embodiment of the present invention;

[0079] Fig.34 is a schematic diagram of the three-dimensional structure of the second fixture of the cavity distance controller according to an embodiment of the present invention;

[0080] Fig.35 It is a three-dimensional structural schematic diagram of an upstream valve bottom plate and a section cavity bottom plate assembly according to an embodiment of the present invention;

[0081] Fig.36 It is a schematic diagram of the three-dimensional structure between the bottom plate components of the section cavity according to an embodiment of the present invention;

[0082] Fig.37 It is a three-dimensional structural schematic diagram of the joint cavity bottom plate assembly, the monitoring bottom plate and the downstream valve bottom plate of an embodiment of the present invention;

[0083] Fig.38 is a schematic diagram of the three-dimensional structure of a bottom plate adjuster according to an embodiment of the present invention;

[0084] Fig.39 is a schematic diagram of the three-dimensional structure of a bottom plate adjuster according to another embodiment of the present invention;

[0085] Fig.40 is a schematic diagram of the three-dimensional structure of a track locker according to an embodiment of the present invention;

[0086] As shown in the figure:

[0087] 90. accelerator cavity device, 91. section cavity, 91a. ear plate, 92. upstream end, 93. downstream end, 94. cold end, 95. coupler, 95a. small flange, 95b. large flange, 96. upstream valve, 97. downstream valve, 98. low temperature monitoring chamber, 99. bellows;

[0088] 100. Assembly tooling for the accelerator cavity device, 110. Upstream cavity adjustment bracket, 111. Upstream cavity support plate, 111a. Upstream cavity transverse plate, 111b. Upstream cavity vertical plate, 111c. Arc-shaped groove in the lower half of the upstream cavity, 111d. Avoidance hole, 112. Upstream cavity Z-direction fine-tuning screw, 113. Upstream cavity fixing bolt, 114. Upstream cavity adjustment washer;

[0089] 120, downstream cavity adjustment bracket, 121, downstream cavity supporting plate, 121a, downstream cavity transverse plate, 121b, downstream cavity vertical plate, 121c, downstream cavity lower half circumference arc groove, 121d, arc convex rib, 121e, extension plate, 122, downstream cavity Z-direction fine-tuning screw, 123, downstream cavity fixing bolt, 124, downstream cavity adjustment washer, 125, hoop plate, 125a, upper half circumference arc groove;

[0090] 130, rotating angle fine-adjusting bracket, 131, rotating frame chassis, 131a, rotating frame chassis Y-axis adjustment hole, 132, rotating frame pillar, 133, flat plate, 134, vertical plate, 134a, first through hole, 134b, second through hole, 134c, third through hole, 135, ear fixing bolt, 136, angle adjustment bolt, 137, reinforcing rib plate, 138, pillar bolt, 139, plate body bolt;

[0091] 140. Valve adjustment bracket, 141. Valve chassis, 141a. Valve chassis Y-direction adjustment hole, 142. Valve pillar, 143. Valve top plate, 144. Valve slide plate, 144a. Valve X-direction side plate, 144b. Valve X-direction horizontal fine-tuning bolt, 144c. Valve Y-direction side plate, 144d. Valve Y-direction horizontal fine-tuning bolt, 145. Slide plate bolt, 145a. Slide plate adjustment washer, 146. Valve Z-direction fine-tuning bolt, 146a. Double-headed screw, 146b. Support plate, 146c. Internal nut, 146d. External nut, 147. Valve support plate, 147a. Threaded hole, 148. Valve bolt, 149. Chassis fixing bolt;

[0092] 150, coupler locking device, 151, lower truss, 151a, lower waist-shaped hole, 152, first vertical bolt, 153, second vertical bolt, 154, upper truss, 155, end plate, 155a, upper waist-shaped hole, 156, transverse bolt;

[0093] 160, monitoring adjustment bracket, 161, monitoring support plate, 161a, monitoring horizontal plate, 161b, monitoring vertical plate, 161c, monitoring lower half arc groove, 162, monitoring Z-direction fine adjustment screw, 163, monitoring fixing bolt, 164, monitoring adjustment washer;

[0094] 170, coupler mounting bracket, 171, bracket chassis, 172, first angle connector, 173, bracket column, 173a, second angle connector, 174, height adjustment mechanism, 174a, lower adjustment plate, 174b, height adjustment bolt, 174c, upper adjustment plate, 175, horizontal adjustment mechanism, 175a, fixing plate, 175b, guide rail, 175c, slide plate, 175d, slide groove, 175e, guide side plate, 175f, X-direction adjustment bolt, 175g, plate adjustment bolt, 176, large flange clamp, 176 a, lower fixture, 176b, upper fixture, 176c, lower clamp, 176d, upper clamp, 176e, fixture bolt, 176f, limit pin, 177, small flange fixture, 177a, Z-type plate, 177b, small flange adjustment rod, 177c, small flange support plate, 178, fixture, 178a, first clamp, 178b, second clamp, 178c, clamp bolt, 178d, third angle connector, 179, Y-axis limit mechanism, 179a, limit block, 179b, Y-axis limit bolt, 179c, Z-axis limit bolt;

[0095] 180, base, 181, upstream valve bottom plate, 182, section cavity bottom plate assembly, 182a, upstream cavity bottom plate, 182b, downstream cavity bottom plate, 182c, fixing strip, 182d, track locker, 182d1, pressure seat, 182d2, pressure hand, 182d3, connecting rod, 182d4, pressure rod, 182e, pressure hole, 183, monitoring bottom plate, 184, downstream valve bottom plate, 185, bottom plate regulator, 185a, card seat, 185b, bottom plate adjusting bolt, 185c, bottom plate adjusting nut, 185d, first screw rod, 185e, second screw rod, 185f, tension joint, 185g, adjustment hole;

[0096] 190, cavity distance controller, 191, first fixture head, 191a, first fixture head slot, 192, first fixture waist, 192a, first fixture waist slot, 192b, first avoidance slot, 192c, first connecting hole, 192d, first step surface, 193, first fastener, 194, second fixture head, 194a, second fixture head slot, 195, second fixture waist, 195a, second fixture waist slot, 195b, second avoidance slot, 195c, second connecting hole, 195d, second step surface, 196, second fastener, 197, third fastener;

[0097] 200, universal support, 201, support chassis, 201a, support chassis Y-axis adjustment hole, 202, column tube, 203, flange, 203a, internal thread hole, 203b, upper protruding section, 203c, fixed section, 203d, lower protruding section, 203e, embedded section, 203f, fixed hole, 204, axial adjustment screw, 204a, upper thread section, 204b, round platform, 204c, upper smooth surface section , 204d, lower threaded section, 204e, lower smooth surface section, 204f, cutting surface, 205, axial locking nut, 206, U-shaped bracket, 207, load-bearing plate, 207a, through hole, 207b, load-bearing threaded hole, 208, open hole round nut, 209, load-bearing side plate, 210, Y-axis fine-tuning screw, 211, radial locking screw; 212, flange bolt, 213, chassis bolt, 214, circular table. DETAILED DESCRIPTION

[0098] The present invention is described in detail below in conjunction with the accompanying drawings:

[0099] Please refer to Figures 1 to 3 The accelerator cavity device 90 of the free electron laser device includes an upstream valve 96, a cavity string, a low temperature monitoring chamber 98 and a downstream valve 97 in the order of upstream and downstream. The cavity string is composed of a plurality of segment cavities 91, and the adjacent segment cavities 91 are connected through a bellows 99, wherein the upstream valve 96 is connected to the adjacent segment cavity 91 through the bellows 99, and the downstream valve 97 is connected to the adjacent segment cavity 91 through a vacuum tube and the bellows 99, and a low temperature monitoring chamber (BPM) 98 is provided on the vacuum tube for monitoring the electron beam passing through the accelerator cavity device 90. The segment cavity 91 includes an upstream end 92, a downstream end 93, a cold end 94 and an ear plate 91a. The cold end 94 is connected to a coupler 95, and the coupler 95 includes a small flange 95a and a large flange 95b.

[0100] Please refer to Figures 1 to 6An embodiment of the present invention provides an accelerator cavity device assembly tool 100 for a free electron laser device, which includes at least an upstream cavity adjustment bracket 110 and a downstream cavity adjustment bracket 120, and may also include a rotation angle fine-tuning bracket 130, a valve adjustment bracket 140, a coupler locking device 150, a monitoring adjustment bracket 160, a coupler mounting bracket 170, a base 180, a cavity distance controller 190 or a combination thereof.

[0101] Please refer to Figures 1 to 6 The upstream cavity adjustment bracket 110 and the downstream cavity adjustment bracket 120 of the embodiment of the present invention are used to install and support the segment cavity 91 of the accelerator cavity device 90, and can adjust the coaxiality of the cavity string formed by the segment cavity 91.

[0102] Please refer to Fig. 9 The upstream cavity adjustment bracket 110 of the embodiment of the present invention includes a universal support column 200 and an upstream cavity support plate 111 located on the universal support column 200 .

[0103] Please refer to Fig. 9 , Figures 12 to 17 The universal pillar 200 includes a pillar chassis 201 and a pillar tube 202 vertically connected to the pillar chassis 201. The pillar tube 202 is threadedly connected to an axial adjustment screw 204 extending into the pillar tube 202 through a flange 203. The axial adjustment screw 204 is threadedly connected to an axial locking nut 205 located above the flange 203. The axial adjustment screw 204 is connected to a U-shaped bracket 206 through an open-hole round nut 208. A bearing plate 207 is arranged on the U-shaped bracket 206. Bearing side plates 209 are arranged on both sides of the bearing plate 207. A Y-axis fine-tuning screw 210 is arranged on the bearing side plate 209.

[0104] Please refer to Fig. 9 The support plate 207 is provided with an upstream cavity support plate 111 which can be fine-tuned in the Z direction and the Y direction relative to the support plate 207. The upstream cavity support plate 111 includes an upstream cavity transverse plate 111a and an upstream cavity vertical plate 111b vertically connected to the upstream cavity transverse plate 111a. The upstream cavity vertical plate 111b is provided with an upstream cavity lower semicircular arc groove 111c matching the upstream end of the section cavity 91. The upstream cavity transverse plate 111a is threadedly connected to the support threaded hole 207b of the support plate 207 through the upstream cavity fixing bolt 113 and the upstream cavity adjusting washer 114 thereon. The upstream cavity transverse plate 111a is also threadedly connected with the upstream cavity Z-direction fine-tuning screw 112 and abuts against the upper surface of the support plate 207; the Y-direction fine-tuning screw 210 abuts against the side walls of the upstream cavity transverse plate 111a or the upstream cavity vertical plate 111b at both ends of the Y direction, and is used to fine-tune the position of the upstream cavity support plate 111 in the Y direction.

[0105] Please refer to Figure 15 to Figure 16 The axial adjustment screw 204 includes an upper threaded section 204a, a round platform 204b, an upper smooth surface section 204c, a lower threaded section 204d and a lower smooth surface section 204e from top to bottom. Figure 7 The flange 203 includes an internal threaded hole 203a arranged in the axial direction, and the flange 203 includes an upper protruding section 203b, a fixed section 203c, a lower protruding section 203d and an embedded section 203e in the axial direction, and the fixed section 203c is provided with an array of fixed holes 203f. The outer diameters of the upper protruding section 203b and the lower protruding section 203d are smaller than the outer diameter of the fixed section 203c, and the outer diameter of the embedded section 203e is smaller than the inner diameter of the column tube 202.

[0106] Please refer to Fig. 9 , Figures 12 to 15 In order to ensure the reliable connection between the flange 203 and the column tube 202, a circular platen 214 is welded and fixedly connected to the outer diameter of the upper end of the column tube 202, for example. The outer diameter of the circular platen 214 is the same as the outer diameter of the fixed section 203c of the flange 203. The circular platen 214 is connected to the flange 203 through flange bolts 212, that is, the flange bolts 212 pass through the fixing holes 203f of the flange 203, and the corresponding circular platen 214 is also provided with through holes that penetrate the flange bolts 212, so as to achieve the reliable connection between the flange 203 and the column tube 202.

[0107] Please refer to Fig.15 In order to further improve the reliability of the connection between the flange 203 and the column tube 202, the annular plate 214 is fixedly connected to the column tube 202 with a reserved assembly groove, and the lower protruding section 203d of the flange 203 is set in the assembly groove to prevent the flange 203 from moving and improve the assembly accuracy. Please refer to Figure 5 and Figure 7The upper protruding section 203b of the flange 203 can increase the axial length of the internal threaded hole 203a on the one hand, improve the adjustment length of the axial adjustment screw 204 in the Z direction, and on the other hand, can improve the bearing capacity of the axial locking nut 205 in the axial direction, and prevent the risk of the flange 203 from breaking. The embedded section 203e of the flange 203 extends into the column tube 202, which can increase the axial length of the internal threaded hole 203a of the flange 203, improve the adjustment length of the axial adjustment screw 204 in the Z direction, and prevent the stability of the flange 203 assembled on the column tube 202, prevent the risk of slipping in the radial direction, and improve the safety of assembly. The lower threaded section 204d of the axial adjustment screw 204 is threadedly connected to the internal threaded hole 203a of the flange 203, and the height of the axial adjustment screw 204 in the Z direction is adjusted by adjusting the position of the axial adjustment screw 204 relative to the flange 203 in the axial direction, thereby adjusting the overall height of the upstream cavity adjustment bracket 110.

[0108] Please refer to Fig. 9 , Figures 12 to 15 In order to improve the locking effect of the axial adjustment screw 204 after adjusting the length in the Z direction and prevent the axial adjustment screw 204 from loosening, the column tube 202 is provided with a radial locking screw 211 in the radial direction, which extends into the column tube 202 and is used to lock the lower smooth surface section 204e of the axial adjustment screw 204.

[0109] Please refer to Fig. 9 , Fig.12 In order to facilitate the length adjustment of the axial adjustment screw 204 in the Z direction, a cutting surface 204f is provided on the upper smooth surface section 204c of the axial adjustment screw 204, so that a manual tool such as a wrench can contact the cutting surface 204f to adjust the axial adjustment screw 204 in the Z direction. The cutting surface 204f can be provided with one surface, two opposite surfaces, or four vertically opposite surfaces.

[0110] Please refer to Fig. 9 , Figures 12 to 15 , the circular platform 204b of the axial adjustment screw 204 is supported under the U-shaped bracket 208, and the perforated round nut 208 fixes the U-shaped bracket 206 on the axial adjustment screw 204. The perforated round nut 208 is screwed in or out through an external tool through the hole in the radial direction of the perforated round nut 208 to lock or loosen the U-shaped bracket 208. The hole can be a circular hole or a regular polygonal hole. The design of the perforated round nut 208 can make the side wall height of the U-shaped bracket 208 as small as possible to improve the structural stability of the U-shaped bracket 208. It can also make the structural design of the bearing plate 207 and the U-shaped bracket 208 more compact and improve the structural stability. Please refer to Fig.12In order to facilitate the assembly of the perforated round nut 208, a through hole 207a is provided on the bearing plate 207, so that the perforated round nut 208 can pass through the through hole 207a and fall into the upper threaded section 204e of the axial adjustment screw 204. Under the premise of structural stability, the perforated round nut 208 can also be replaced by a regular polygonal nut.

[0111] Please refer to Fig. 9 , Figures 12 to 15 The support chassis 201 of the upstream cavity adjustment bracket 110 of the embodiment of the present invention includes but is not limited to a rectangular shape, the column tube 202 includes but is not limited to a round steel tube or a square steel tube, and the flange 203 includes but is not limited to a circular ring.

[0112] Please refer to Fig. 9 In order to avoid damage to the segment cavity 91 when assembling the segment cavity 91 of the accelerator cavity device 90, an avoidance hole 111d is provided downwardly through the arc-shaped groove 111c of the lower half of the upstream cavity of the upstream cavity support plate 111.

[0113] Please refer to Fig. 9 , Figures 12 to 15 The installation method of the upstream cavity adjustment bracket 110 of the embodiment of the present invention includes coarse adjustment and fine adjustment. The method for coarse adjustment of the upstream cavity adjustment bracket 110 includes: placing the upstream end of the segment cavity 91 on the arc groove 111c of the lower half of the upstream cavity of the upstream cavity adjustment bracket 110. The coarse adjustment in the horizontal direction can be achieved by the overall movement of the upstream cavity adjustment bracket 110, and the coarse adjustment of the upstream cavity adjustment bracket 110 in the Z direction can be achieved by the rotation length of the axial adjustment screw 204, so as to perform coarse adjustment on the upstream end 92 of the segment cavity 91 in the Z direction. The method for fine-tuning the upstream cavity adjustment bracket 110 includes: loosening the upstream cavity fixing screw 113, adjusting the height position of the upstream cavity support plate 111 relative to the bearing plate 207 in the Z direction by adjusting the screw-in length of the upstream cavity Z-direction fine-tuning screw 112, so as to fine-tune the upstream cavity support plate 111 in the Z direction, thereby fine-tuning the position of the upstream end 92 of the section cavity 91 in the Z direction; adjusting the relative position distance between the side wall of the upstream cavity support plate 111 in the Y direction and the bearing side plate 209 by adjusting the screw-in length of the Y-direction fine-tuning screw 210, so as to fine-tune the upstream cavity support plate 111 in the Y direction, thereby fine-tuning the position of the upstream end 92 of the section cavity 91 in the Y direction; tightening the upstream cavity fixing screw 113 after adjusting to a suitable position. The upstream cavity adjustment bracket 110 provided in the embodiment of the present invention can perform coarse adjustment on the segment cavity of the accelerator cavity device in the X, Y, and Z directions and fine adjustment in the Y and Z directions, so that the segment cavity 91 meets the installation accuracy requirements.

[0114] Please refer to Fig. 9In the embodiment of the present invention, the position of the upstream cavity cross plate 111a corresponding to the upstream cavity fixing screw 113 is a through hole (referred to as a large round hole) or a waist-shaped hole that is larger than the diameter of the upstream cavity fixing screw 113. When the upstream cavity fixing screw 113 is loosened, when the screw-in length of the Y-direction fine-tuning screw 210 is adjusted in the Y direction, the upstream cavity fixing screw 113 moves along with the screw-in length of the Y-direction fine-tuning screw 210, that is, the upstream cavity fixing screw 113 and the Y-direction fine-tuning screw 210 produce a linkage effect. When fine-tuning in the Y and Z directions reaches the position requirement, the upstream cavity support plate 111 is locked and fixed by the upstream cavity adjustment washer 114 whose outer diameter is larger than the through hole.

[0115] Please refer to Fig.10 , Figures 12 to 17 The downstream cavity adjustment bracket 120 of the embodiment of the present invention includes a universal pillar 200 having the same structure as the upstream cavity adjustment bracket 110 , and a downstream cavity support plate 121 located on the universal pillar 200 .

[0116] Please refer to Fig.10 , the downstream cavity support plate 121 includes a downstream cavity transverse plate 121a and a downstream cavity vertical plate 121b vertically connected to the downstream cavity transverse plate 121a, the downstream cavity vertical plate 121b is provided with a downstream cavity lower half circumference arc groove 121c matching the downstream end 93 of the section cavity 91, and an arc convex rib 121d may be provided along the downstream cavity lower half circumference arc groove 121c, the downstream cavity transverse plate 121a is threadedly connected to the bearing threaded hole 207b of the bearing plate 207 through the downstream cavity fixing bolt 123 and the downstream cavity adjustment washer 124 thereon, the downstream cavity transverse plate 121a is also threadedly connected to the downstream cavity Z-direction fine-tuning screw 122 and abuts against the upper surface of the bearing plate 207, the Y-direction fine-tuning screw 210 abuts against the side walls of the downstream cavity transverse plate 121a or the downstream cavity vertical plate 121b at both ends in the Y direction, and is used to fine-tune the position of the downstream cavity support plate 121 in the Y direction. Please refer to Fig. 9 and Fig.10 The downstream cavity support plate 121 has the same structure as the upstream cavity support plate 111 except that the arc-shaped convex rib 121d may be provided.

[0117] Please refer to Fig.10 In the embodiment of the present invention, the position of the downstream cavity horizontal plate 121a corresponding to the downstream cavity fixing screw 123 is a through hole (referred to as a large circular hole) or a waist-shaped hole that is larger than the diameter of the downstream cavity fixing screw 123. Please refer to Fig.10 , Figures 12 to 15The installation method of the downstream cavity adjustment bracket 160 of the embodiment of the present invention includes a coarse adjustment method and a fine adjustment method, wherein the coarse adjustment method in the Z direction is realized by the axial adjustment screw 204. The fine adjustment installation method is to perform fine adjustment in the Y direction by the Y-direction fine adjustment screw 210, and to perform fine adjustment in the Z direction by the downstream cavity Z-direction fine adjustment screw 122. The adjustment principle of the specific installation method is the same as that of the upstream cavity adjustment bracket 110. It will not be repeated here.

[0118] Please refer to Figures 1 to 6 The accelerator cavity device assembly tool 100 of the embodiment of the present invention may further include a rotation angle fine-tuning bracket 130 for adjusting the rotation angle of the cavity 91 .

[0119] Please refer to Figures 18 to 21 The rotation angle fine-tuning bracket 130 of the embodiment of the present invention includes a rotating frame chassis 131, a rotating frame pillar 132 vertically connected to the rotating frame chassis 131, a flat plate 133 vertically arranged on the rotating frame pillar 132, and vertical plates 134 arranged at both ends of the flat plate 133 in the Y direction. The distance between the two vertical plates 134 in the Y direction is greater than or equal to the diameter of the section cavity 91 of the accelerator cavity device. The vertical plates 134 are sequentially provided with a first through hole 134a and a second through hole 134b from top to bottom. The vertical plates 134 are provided with ear fixing bolts 135 passing through the first through hole 134a at both ends in the X direction to fix the ear 91a of the section cavity 91 of the accelerator cavity device at both ends in the X direction. The vertical plates 134 are provided with angle adjustment bolts 136 passing through the first through hole 134a at both ends in the Z direction to fix the ear 91a of the section cavity 91 of the accelerator cavity device at both ends in the Z direction.

[0120] Please refer to Fig.18 , the distance between the two vertical plates 134 in the Y direction constitutes the clamping opening of the section cavity 91, and the distance between the two vertical plates 134 in the Y direction can be fixed or adjustable. When the distance between the two vertical plates 134 in the Y direction is fixed, the vertical plates 134 and the flat plate 133 can be welded and fixed. When the distance between the two vertical plates 134 in the Y direction is adjustable, at least one of the vertical plates 134 in the Y direction is adjustable to accommodate section cavities of different diameters. For example, the vertical plate 134 is fixedly connected to the flat plate 133 by a support bolt 138 passing through a Y-shaped waist hole provided on the vertical plate 134 and / or the flat plate 133. In order to provide sufficient operating space for the support bolt 138, the vertical plate 134 also includes a third through hole 134c located below the second through hole 134b.

[0121] Please refer to Fig.19In order to improve the strength and stability of the flat plate 133 and the vertical plate 134 , a reinforcing rib plate 137 is provided between the rotating frame support 132 and the flat plate 133 .

[0122] Please refer to Fig.21 In order to achieve the purpose of fine-tuning the rotation angle of the section cavity 91 by the rotation angle fine-tuning bracket 130, before setting the rotation angle fine-tuning bracket 130, the section cavity 91 needs to be supported by the upstream cavity adjustment bracket 110 and the downstream cavity adjustment bracket 120. In the embodiment of the present invention, in order to achieve the purpose of fine-tuning the rotation angle of the section cavity 91, the upstream cavity adjustment bracket 110 is not limited to the adjustment function, and can also be an upstream end bracket of other structures, and the downstream cavity adjustment bracket 120 is not limited to the adjustment function, and can also be a downstream end bracket of other structures.

[0123] Please refer to Figures 18 to 21 The rotation angle fine-tuning method of the rotation angle fine-tuning bracket 130 according to the embodiment of the present invention is as follows:

[0124] The rotation angle fine-tuning bracket 130 is assembled on both sides of the lug 91a of the segment cavity 91 of the accelerator cavity device, and the lug 91a is located in the first through hole 134a. The lug 91a is fixed in the X direction by the lug fixing bolt 135 so that the segment cavity 91 remains unchanged at the current rotation angle. Then, the upper and lower spacing of the lug 91a in the first through hole 134a is adjusted in the Z direction by the rotation length of the angle adjustment bolt 136, so that the lug 91a is driven to change the rotation angle of the segment cavity 91 by the rotation length of the angle adjustment bolt 136, so as to achieve fine adjustment of the rotation angle of the segment cavity 91. In the embodiment of the present invention, the lug fixing bolts 135 at both ends in the X direction are respectively against the two end surfaces of the lug 91a in the X direction, and the angle adjustment bolts 136 at both ends in the Z direction are respectively against the two end surfaces of the lug 91a in the Z direction. An internal threaded hole can also be set in the lug 91a, and the lug fixing bolt 135 and the angle adjustment bolt are respectively threadedly connected to the internal threaded hole of the lug 91a. The second through hole 134b is used to provide an operating space for the angle adjustment bolt 136 below the hanging ear 91a, so that the rotation length of the angle adjustment bolt 136 on the hanging ear 91a can be adjusted.

[0125] Please refer to Figure 1 , Figure 3 to Figure 4 and Figure 6 The accelerator chamber device assembly tool 100 of the embodiment of the present invention may further include a monitoring adjustment bracket 160 for installing and supporting the low-temperature monitoring chamber 98 of the accelerator chamber device 90 .

[0126] Please refer to Figures 11 to 17The monitoring and adjusting bracket 160 of the embodiment of the present invention includes a universal pillar 200 having the same structure as the upstream cavity adjustment bracket 110 , and a monitoring support plate 161 located on the universal pillar 200 .

[0127] Please refer to Fig.11 The monitoring support plate 161 includes a monitoring horizontal plate 161a and a monitoring vertical plate 161b vertically connected to the monitoring horizontal plate 161a. The monitoring vertical plate 161b is provided with a monitoring lower half arc groove 161c matching the low temperature monitoring chamber 98. The monitoring horizontal plate 161a is threadedly connected to the bearing threaded hole 207b of the bearing plate 207 through the monitoring fixing bolt 163 and the monitoring adjustment washer 164 thereon. The monitoring horizontal plate 161a is also threadedly connected with a monitoring Z-direction fine-tuning screw 162 and abuts against the upper surface of the bearing plate 207. The Y-direction fine-tuning screw 210 abuts against the side walls of the monitoring horizontal plate 161a or the monitoring vertical plate 161b at both ends of the Y direction, which is used to fine-tune the installation position of the monitoring support plate 161. Please refer to Fig. 9 and Fig.11 The monitoring support plate 161 of the embodiment of the present invention has the same structure as the upstream cavity support plate 111.

[0128] Please refer to Figures 11 to 15 The installation method of the monitoring adjustment bracket 160 of the embodiment of the present invention includes coarse adjustment and fine adjustment, wherein the coarse adjustment method in the Z direction is realized by the axial adjustment screw 204. The fine adjustment installation method is to perform fine adjustment in the Y direction by the Y-direction fine adjustment screw 210, and to perform fine adjustment in the Z direction by monitoring the Z-direction fine adjustment screw 162. The specific installation method is the same as the adjustment method of the upstream cavity adjustment bracket 110, and will not be repeated here.

[0129] Please refer to Figure 1 and Figure 2 The coupler mounting bracket 170 of the embodiment of the present invention is used to mount the coupler 95 on the cold end 94.

[0130] Please refer to Figure 22 to Figure 26 The coupler mounting bracket 170 includes a bracket chassis 171, a bracket column 173, a height adjustment mechanism 174, a horizontal adjustment mechanism 175, a large flange clamp 176 and a small flange clamp 177 with adjustable height.

[0131] Please refer to Figure 22 to Figure 25, the support chassis 171 includes but is not limited to a rectangular plate, and the support column 173 includes but is not limited to a square steel pipe, an I-beam, a channel steel, etc. The support chassis 171 and the support column 173 can be welded and fixed, or they can be fixedly connected by countersunk bolts such as hexagon socket bolts. The countersunk bolts can make the bottom plane of the support chassis 171 flatter when the support chassis 171 is connected to the support column 173, so that the structure of the coupler mounting bracket 170 is more stable. In order to improve the stability and strength of the connection between the support chassis 171 and the support column 173, a first angle connector 172 is threadedly connected and fixed with the support chassis 171 and the support column 173 by bolts, and the height adjustment mechanism 174 set at the upper end of the support column 173 can be welded and fixed, or it can be fixedly connected by bolts. In order to provide stability and strength of the connection between the height adjustment mechanism 174 and the support column 173, a second angle connector 173a can be fixed between the support column 173 and the height adjustment mechanism 174 by bolts or welding. Connecting the first angle connector 171a and the second angle connector 173a by bolts has the advantages of being easy to disassemble and recycle.

[0132] Please refer to Figure 22 to Figure 25 The height adjustment mechanism 174 includes a lower adjustment plate 174a and an upper adjustment plate 174c, and a height adjustment bolt 174b connected between the lower adjustment plate 174a and the upper adjustment plate 174c. The height adjustment bolt 174b adjusts the distance between the lower adjustment plate 174a and the upper adjustment plate 174c to fine-tune the coupler mounting bracket 170 in the Z direction, thereby fine-tuning the installation position of the coupler 95. The bracket column 173 is fixedly connected to the lower adjustment plate 174a of the height adjustment mechanism 174.

[0133] Please refer to Figure 22 to Figure 25The horizontal adjustment mechanism 175 includes a fixed plate 175a fixedly arranged on the upper adjustment plate 174c of the height adjustment mechanism 174 by a plate adjustment bolt 175g, and a slide plate 175c capable of moving relative to the fixed plate 175a in the Y direction, that is, the slide plate 175c slides relative to the fixed plate 175a in the Y direction. The fixed plate 175a is provided with at least two parallel guide rails 175b in the Y direction, and the slide plate 175c is provided with a slide groove 175d matching the guide rails 175b. The guide rails 175b can be fixed to the fixed plate 175a by bolts, and the slide groove 175d can be fixed to the slide plate 175c by bolts. The slide plate 175c moves relative to the fixed plate 175a in the Y direction through the guide rails 175b and the slide groove 175d. Wherein the guide rails 175b can be replaced by guide wheels, and the slide plate 175c moves relative to the fixed plate 175a in the Y direction through the guide wheels and the slide groove 175d. A guide side plate 175e is provided on the side wall of the fixed plate 175a parallel to the guide rail 175b or the guide wheel by welding or bolt connection. In the embodiment of the present invention, there are four guide side plates 175e distributed at the corners of the fixed plate 175a. There are four guide side plates 175e, which can avoid the position interference of the slide plate 175c caused by the full-length guide rail side plate being arranged parallel to the outer wall of the guide rail 175b. The guide side plate 175e is used to adjust the fixed plate 175a in the X direction through the X-direction adjustment bolt 175f, so that the coupler mounting bracket 170 can be fine-tuned in the X direction. For example, the X-direction adjustment bolt 175f can be against the side wall of the fixed plate 175a. At this time, the fixed plate 175a is fixedly connected to the upper adjustment plate 174c through the plate adjustment bolt 175g passing through the X-direction adjustment hole (not shown) set on the fixed plate 175a. The position of the upper adjustment plate 174c corresponding to the plate adjustment bolt 175g can be set as a through hole or a threaded hole. When it is a through hole, the plate adjustment bolt 175g needs to be used with a nut. The X-direction adjustment hole can be a waist-shaped hole set along the X direction or a circular hole (not shown) with a diameter larger than the diameter of the plate adjustment bolt 175g. When the X-direction adjustment hole is a circular hole, the plate adjustment bolt 175g must be used with a washer, and the outer diameter of the washer must be larger than the diameter of the circular hole. The X-direction adjustment hole follows the fixed plate 175a in the X direction. In this structure, the X-direction adjustment bolt 175f is against the side wall of the fixed plate 175a. For another example, the X-direction adjusting bolt 175f can be threadedly connected to the fixing plate 175a, so as to drive the fixing plate 175a to move in the X direction by adjusting the rotation length of the X-direction adjusting bolt 175f. Compared with the design structure in which the X-direction adjusting bolt 175f is threadedly connected to the inside of the fixing plate 175a, the design in which the X-direction adjusting bolt 175f abuts against the side wall of the fixing plate 175a in the above structure has higher structural stability, strength and service life because there is no need to design an internal threaded hole on the guide fixing plate 175a.

[0134] Please refer to Figure 22 to Figure 26 The large flange clamp 176 includes a lower clamp 176a having a lower clamp 176c fixedly connected to the slide plate 175c, and an upper clamp 176b having an upper clamp 176d connected to the lower clamp 176a through a clamp bolt 176e. The upper clamp 176d of the upper clamp 176c is arranged opposite to the lower clamp 176c of the lower clamp 176a, and is used to fix the large flange 95b of the coupler 95. The upper clamp 176b can ensure that the coupler 95 does not fall off. The shape of the lower clamp 176c and the upper clamp 176d is a circumscribed polygon of the large flange 95b, for example, the lower clamp 176c and the upper clamp 176d are regular octagonal shapes, which has the advantage that, compared with the circular shape that is fully adapted to the large flange 95b, the large flange 95b has a certain operating space in the polygonal shape, which is convenient for adjusting the rotation angle of the coupler 95. In order to prevent the coupler 95 disposed in the lower clamp 176a and the upper clamp 176b from rotating around its axis, the lower clamp 176a and / or the upper clamp 176b are provided with a limit pin 176f in the radial direction for fixing the large flange 95b of the coupler 95, and the limit pin 176f is inserted into the insertion groove on the large flange 95b to limit the coupler 95 from rotating around its axis. Figures 1 to 6 The limit pin 176f of the embodiment of the present invention is arranged on the bottom plane of the lower clamp 176c or the top plane of the upper clamp 176d. The large flange clamp 176 can be fine-tuned in the Y direction and the X direction according to the horizontal adjustment mechanism 175, and can also be fine-tuned in the Z direction according to the height adjustment mechanism 174, so as to meet the requirements of the installation position and installation accuracy of the coupler 95.

[0135] Please refer to Figure 22 to Figure 26The small flange fixture 177 includes a Z-shaped plate 177a fixedly arranged on a slide plate 175c by welding or bolts, and the Z-shaped plate 177a is adjustably connected to a small flange support plate 177c in the Z direction through a small flange adjustment rod 177b, and a groove for supporting the small flange 95a of the coupler 95 is provided on the small flange support plate 177c, and the groove can be a V-shaped structure, or it can match the arc surface of the small flange 95a. When the small flange support plate 177c of the V-shaped structure contacts the coupler 95, a certain operating space is reserved to facilitate the position adjustment of the small flange 95a of the coupler 95, wherein the Z-shaped plate 177a of the small flange fixture 177 includes a low-surface plate, a longitudinal vertical plate and a high-surface plate, and the low-surface plate is fixedly connected to the slide plate 175c, and the high-surface plate is suspended and extends out of the Y-direction end surface of the slide plate 175c, so as to provide a larger free adjustment space for the small flange adjustment rod 177b in the Z direction. The small flange adjustment rod 177b of the embodiment of the present invention includes a nut threaded thereon. The small flange fixture 177 can be fine-tuned in the Y direction and the X direction according to the horizontal adjustment mechanism 175, and can also be fine-tuned in the Z direction according to the height adjustment mechanism 174. The height of the small flange support plate 177c is adjusted by the small flange adjustment rod 177b, so that the axis of the small flange 95a of the coupler 95 and the large flange 95b are kept at the same height, thereby meeting the requirements of the installation position and installation accuracy of the coupler 95. The common use of the large flange fixture 176 and the small flange fixture 177 of the embodiment of the present invention can ensure the coaxial installation of the coupler 95 relative to the cold end 94.

[0136] Please refer to Fig.23 The coupler mounting bracket 170 of the embodiment of the present invention further includes a limiting mechanism, which includes a Y-direction limiting mechanism and a Z-direction limiting mechanism. The fixed plate 175a is provided with a Y-direction limiting mechanism 179 along the Y direction to limit the relative position movement of the slide plate 175c. The Y-direction limiting mechanism 179 includes a limiting block 179a provided on the fixed plate 175a, and a Y-direction limiting bolt 179b is provided through the limiting block 179a in the Y direction. The Y-direction limiting bolt 179b abuts against the side wall of the slide plate 175c or is threadedly connected to the slide plate 175c. The Z-direction limiting mechanism is a Z-direction limiting bolt 179c that vertically passes through the slide plate 175c and is threadedly connected to the fixed plate 175a or abuts against the upper plane of the fixed plate 175a.

[0137] Please refer to Figure 22 to Figure 27In order to improve the stability of the coupler mounting bracket 170, the coupler mounting bracket 179 of the embodiment of the present invention further includes a lock 178 disposed on the bracket column 173, the lock 178 includes a first lock plate 178a vertically connected to the bracket column 173, and a second lock plate 178b connected to the first lock plate 178a, the first lock plate 178a and the second lock plate 178b are fixed to the downstream cavity adjustment bracket 120 by lock plate bolts 178c, wherein the first lock plate 178a and the second lock plate 178b are respectively provided with a semi-arc groove matching the column tube of the downstream cavity adjustment bracket 120. The grooves on the first lock plate 178a and the second lock plate 178b are not limited to semi-arc shapes, and can match the shape of the column to be connected, and the column to be connected includes but is not limited to the downstream cavity adjustment bracket 120. The first lock plate 178a can be welded to the bracket column 173. In order to avoid interference between the lock 178 and the components on the column tube of the downstream cavity adjustment bracket 120, the first lock plate 178a can be bolted to the bracket column 173 through the third angle connector 178d, so that the height position of the third angle connector 178d can be adjusted on the bracket column 173.

[0138] Please refer to Figure 1 , Figure 3 to Figure 4 and Figure 6 The coupler locking device 150 of the embodiment of the present invention is used to fix the coupler 95 so that it maintains a stable connection with the cold end 94.

[0139] Please refer to Fig.28 , Fig.29 and Fig.30 The coupler locking device 150 of the embodiment of the present invention comprises a lower truss 151 and an upper truss 154 arranged in parallel along the Y direction, the lower truss 151 is provided with vertical bolts for fixing the coupler 95 in the radial direction, the vertical bolts include a first vertical bolt 152 for fixing the small flange 95a of the coupler 95 in the radial direction and a second vertical bolt 153 for fixing the large flange 95b of the coupler 95 in the radial direction; an end plate 155 is arranged perpendicular to the upper truss 154, and the end plate 155 is provided with a transverse bolt 156 for fixing the large flange 95b of the coupler 95 in the axial direction. Specifically, the first vertical bolt 152 is fixedly connected to the threaded hole in the radial direction of the small flange 95a of the coupler 95, the second vertical bolt 153 is fixedly connected to the threaded hole in the radial direction of the large flange 95b of the coupler 95; the transverse bolt 156 is connected to the threaded hole on the axial end face of the large flange 95b of the coupler 95.

[0140] Please refer to Figures 28 to 30The coupler locking device 150 of the embodiment of the present invention is fixedly connected to the small flange 95a of the coupler 95 in the radial direction by the first vertical bolt 152 on the lower truss 151, is fixedly connected to the large flange 95b of the coupler 95 in the radial direction by the second vertical bolt 153, and is fixedly connected to the large flange 95b of the coupler 95 in the axial direction by the transverse bolt 156 on the end plate 155 of the upper truss 154, so that the coupler 95 and the cold end 94 of the section cavity 91 are finally in a locked state, preventing the coupler 95 from being loosened and unstable after being fixedly connected to the cold end 94 due to the gravity of the large flange 95b of the coupler 95 being greater than the gravity of the small flange 95a, thereby preventing the risk of tilting toward the large flange 95b of the coupler 95, thereby achieving a stable connection between the cold end of the section cavity 91 and the coupler 95.

[0141] Please refer to Figures 28 to 30 The installation and adjustment method of the coupler locking device 150 of the embodiment of the present invention includes: the first vertical bolt 152 and the second vertical bolt 153 of the lower truss 151 are fine-tuned in the X direction through the lower waist-shaped hole 151a set on the lower truss 151, and the transverse bolt 156 on the upper truss 154 is fine-tuned in the X direction through the upper waist-shaped hole 155a set on the end plate 155, so as to achieve accurate installation and stable connection between the cold end 94 of the section cavity 91 and the coupler 95.

[0142] Please refer to Fig.28 and Fig.29 In order to improve the installation accuracy of the first vertical bolt 152, the second vertical bolt 153 and the transverse bolt 156 with the coupler 95, the coupler locking device 150 of the embodiment of the present invention is provided with a lower waist-shaped hole 151a for passing through the first vertical bolt 152 and the second vertical bolt 153 respectively on the lower truss 154, and an upper waist-shaped hole 155a for passing through the transverse bolt 156 is provided on the end plate 155 of the upper truss 154, and the lower waist-shaped hole 151a and the upper waist-shaped hole 155a are both distributed along the X direction. Then, the first vertical bolt 152, the second vertical bolt 153 and the transverse bolt 156 can be adjusted in position along the X direction, thereby improving the installation accuracy thereof with the coupler 95. Of course, when the first vertical bolt 152, the second vertical bolt 153 and the transverse bolt 156 are adjusted in position in the X direction, they need to be used in conjunction with nuts.

[0143] In order to facilitate assembly and material acquisition, the lower truss 151 and the upper truss 154 of the embodiment of the present invention can both be made of angle steel or angle iron.

[0144] Please refer to Figures 28 to 30The coupler locking device 150 of the embodiment of the present invention may also include but is not limited to the aforementioned downstream cavity adjustment bracket 120 and other brackets, and the lower truss 151 and the upper truss 154 are both arranged on the bracket. For example: when the coupler locking device 150 is arranged on the downstream cavity adjustment bracket 120, the lower truss 151 can be arranged on the downstream cavity vertical plate 121b by welding or bolt connection, and the upper truss 154 can be arranged on the hoop plate 125 by welding or bolt connection.

[0145] Please refer to Fig.28 and Fig.29 , the downstream cavity adjustment bracket 120 of the embodiment of the present invention, the downstream cavity vertical plate 121b is provided with a clamping plate 125, and the clamping plate 125 is provided with a downstream cavity upper half circumference arc groove 125a that matches the upper half circumference of the downstream end 93 of the joint cavity body 91. The lower half of the arc groove 121c of the lower half of the downstream cavity and the upper half of the arc groove 125a of the upper half of the downstream cavity include but are not limited to 1 / 2 circle, and may also be larger or smaller than 1 / 2 circle. The arc groove 121c of the lower half of the downstream cavity and the arc groove 125a of the upper half of the downstream cavity in the embodiment of the present invention form an unclosed C-shaped structure, and the unclosed C-shaped structure can avoid the occurrence of a stuck situation when the downstream cavity vertical plate 121b and the clamping plate 125 are assembled at the downstream end of the joint cavity body 91. One end of the downstream cavity vertical plate 121b is provided with an extension plate 121e extending in the Y direction, and the extension plate 121e is threadedly fixedly connected to the clamping plate 125 by a clamping bolt 121f to facilitate the disassembly and assembly of the downstream cavity vertical plate 121b. The arc-shaped convex rib 121d arranged on the arc-shaped groove 121c along the lower half of the downstream cavity can be engaged in the groove of the downstream end 93 of the section cavity 91 to achieve a reliable connection between the downstream cavity support plate 121 and the downstream end 93 of the section cavity 91. The setting of the clamping plate 125 can, on the one hand, provide a more stable effect on the installation and support of the downstream end 93 of the section cavity 91, and prevent the section cavity 91 from being moved or even tipped over due to external forces, and on the other hand, can make the installation of the upper truss 154 more reliable.

[0146] The cooperation of the coupler locking device 150 and the downstream cavity adjustment bracket 120 of the embodiment of the present invention can perform coarse adjustment of the section cavity of the accelerator cavity device in the X, Y, and Z directions and fine adjustment in the X, Y, and Z directions, as well as precise installation and stable connection of the coupler, so that the section cavity and the coupler meet the requirements of installation accuracy and stable connection.

[0147] Please refer to Figures 1 to 8 The valve adjustment bracket 140 of the embodiment of the present invention is used to install and support the upstream valve 96 and the downstream valve 97 of the accelerator cavity device 90.

[0148] Please refer to Figures 7 and 8 The valve adjustment bracket 140 of the embodiment of the present invention includes the following two schemes.

[0149] Please refer to Figure 7 In order to improve the installation accuracy of the upstream valve 96 and the downstream valve 97 in the X direction and the Z direction, the valve adjustment bracket 140 of the first embodiment of the present invention includes: a valve bottom plate 141, a valve support 142 vertically connected to the valve bottom plate 141, and a valve top plate 143 vertically connected to the upper end of the valve support 142. The valve top plate 143 is connected to the valve slide plate 144 through a slide plate bolt 145 and a slide plate adjustment washer 145a thereon. The valve top plate 143 is provided with a threaded hole (not shown) at a position corresponding to the slide plate bolt 145. The valve slide plate A horizontal adjustment hole (not shown) is provided on 144 at the position corresponding to the slide plate bolt 145, and valve X-direction side plates 144a are provided at both ends of the valve slide plate 144 in the X direction. Valve X-direction horizontal fine-tuning bolts 144b are provided on the valve X-direction side plates 144a, and the opposite ends of the screw heads of the valve X-direction horizontal fine-tuning bolts 144b are abutted against the side wall of the valve top plate 143. The valve slide plate 144 is connected to the valve support plate 147 through the valve Z-direction fine-tuning bolts 146, and the valve support plate 147 is provided with valve bolts 148 for fixing the valve of the accelerator cavity device.

[0150] Please refer to Figure 7 The valve adjustment bracket 140 of the first embodiment of the present invention, wherein the valve bottom plate 141 includes but is not limited to a square shape, the valve support 142 includes but is not limited to a round steel pipe, the valve top plate 143 includes but is not limited to a square steel plate, the valve slide plate 144 includes but is not limited to a square steel plate, the valve slide plate 144 and the valve X-direction side plate 144a include but are not limited to an integral structure, the valve support plate 147 includes but is not limited to a square steel plate, wherein the connection between the valve support plate 147 and the valve bolt 148 includes but is not limited to a raised structure to improve the strength of the valve bolt 148 connecting the valve and prevent the valve support plate 147 from being broken or deformed due to being too thin.

[0151] Please refer to Figure 7, the valve adjustment bracket 140 provided in the first embodiment of the present invention has two valve Z-direction fine-tuning bolts 146, which are distributed at both ends of the valve slide plate 144 in the Y direction. The valve Z-direction fine-tuning bolts 146 include a double-headed screw 146a, the upper end of which is provided with an outer nut 146d located on the upper side of the valve support plate 147 and an inner nut 146c located on the lower side of the valve support plate 147; the lower end of the double-headed screw 146a is provided with an outer nut 146d located on the lower side of the valve slide plate 144 and an inner nut 146c located on the upper side of the valve slide plate 144. At this time, the connection positions of the Z-direction fine-tuning bolts 146 corresponding to the valve slide plate 144 and the valve support plate 147 are all through holes. In order to improve the locking effect of the Z-direction fine-tuning bolts 146 and prevent loosening, conical washers 146e and spherical washers 146f are provided between the inner nut 146c, the outer nut 146d and the corresponding plate body.

[0152] Please refer to Figure 7 The valve adjustment bracket 140 provided in the first embodiment of the present invention is installed as follows: first, the valve bolt 148 is threadedly connected to the upstream valve 96 or the downstream valve 97 to fix the corresponding valve through the valve adjustment bracket 140; then, the distance between the valve slide plate 144 and the valve support plate 147 is adjusted by the Z-axis fine-tuning bolt 146, so as to perform Z-axis fine-tuning of the valve; secondly, the slide plate bolt 145 is loosened to allow the valve slide plate 144 and the valve top plate 143 to slide relative to each other, and the X-axis distance of the valve slide plate 144 relative to the valve top plate 143 is adjusted by the valve X-axis horizontal fine-tuning bolt 144b, so as to perform X-axis fine-tuning of the valve, and the slide plate bolt 145 is tightened to allow the valve slide plate 144 and the valve top plate 143 to be relatively locked. In the first embodiment of the present invention, the valve can be roughly adjusted horizontally in the X and Y directions through the overall horizontal movement of the valve adjustment bracket 140, and the valve can be finely adjusted in the X and Z directions through the valve X-direction horizontal fine-tuning bolt 144b and the Z-direction fine-tuning bolt 146, so as to improve the installation accuracy of the upstream valve 96 and the downstream valve 97. The specific adjustment method of the X-direction fine-tuning is as follows: Since the opposite end of the screw head of the valve X-direction horizontal fine-tuning bolt 144b abuts against the side wall of the valve top plate 143, the valve slide plate 144 can be moved relative to the valve top plate 143 in the X direction by rotating the length position of the valve X-direction horizontal fine-tuning bolt 144b, that is, the X-direction fine-tuning is performed by adjusting the distance between the valve X-direction side plate 144a and the side wall of the valve top plate 143.

[0153] Please refer to Figure 7 In the valve adjustment bracket 140 of the first embodiment of the present invention, the horizontal adjustment hole is a circular hole larger than the diameter of the slide plate bolt 145, and the outer diameter of the slide plate adjustment washer 145a is larger than the diameter of the horizontal adjustment hole. The horizontal adjustment hole and the adjustment distance of the valve X-axis horizontal fine-tuning bolt 144b produce a linkage effect.

[0154] Please refer to Figure 8 In order to improve the installation accuracy of the upstream valve 96 and the downstream valve 97 in the X direction, the Y direction and the Z direction, the valve adjustment bracket 140 provided in the second embodiment of the present invention is improved on the basis of the valve adjustment bracket 140 of the first embodiment, and the difference lies in that there are four valve Z-direction fine-tuning bolts 146, which are distributed at the corners of the valve slide plate 144; the valve Y-direction side plates 144c are provided at both ends of the Y direction of the valve slide plate 144, and the valve Y-direction horizontal fine-tuning bolts 144d are provided on the valve Y-direction side plates 144c, and the opposite ends of the screw heads of the valve Y-direction horizontal fine-tuning bolts 144d are against the side walls of the valve top plate 143. Loosen the slide bolt 145 to allow the valve slide 144 and the valve top plate 143 to slide relative to each other, and adjust the Y-direction distance of the valve slide 144 relative to the valve top plate 143 through the valve Y-direction horizontal fine-tuning bolt 144d, so as to perform Y-direction fine-tuning of the valve. After adjustment, tighten the slide bolt 145 to allow the valve slide 144 and the valve top plate 143 to be relatively locked. The specific adjustment method for Y-direction fine-tuning is as follows: Since the opposite end of the screw head of the valve Y-direction horizontal fine-tuning bolt 144d abuts against the side wall of the valve top plate 143, the valve slide 144 can be moved in the Y direction relative to the valve top plate 143 by rotating the length position of the valve Y-direction horizontal fine-tuning bolt 144d, that is, the Y-direction fine-tuning is performed by adjusting the distance between the valve Y-direction side plate 144c and the side wall of the valve top plate 143. The specific adjustment method for X-direction fine-tuning of the valve adjustment bracket 140 of Scheme 2 is the same as the method of the valve adjustment bracket 140 of Scheme 1. Please refer to Figure 8 The valve support plate 147 in the valve adjustment bracket 140 of the second embodiment of the present invention includes but is not limited to an I-shaped steel plate.

[0155] Please refer to Figure 8In the valve adjustment bracket 140 of the second embodiment of the present invention, the valve Z-direction fine-tuning bolt 146 includes a double-headed screw 146a, and the lower end of the double-headed screw 146a is provided with an inner nut 146c located on the upper side of the valve slide 144 and an outer nut 146d located on the lower side of the valve slide 144; the upper end of the double-headed screw 146a is provided with a support plate 146b and an upper threaded rod located thereon, and the upper threaded rod of the double-headed screw 146a is threadedly connected with the valve support plate 147. At this time, the connection position of the Z-direction fine-tuning bolt 146 corresponding to the valve support plate 147 is the threaded hole 147a, and the connection position of the Z-direction fine-tuning bolt 146 corresponding to the valve slide 144 is a through hole. Compared with the first embodiment, the Z-direction fine-tuning bolt 146 of the second embodiment of the present invention only needs to adjust the inner nut 146c and the outer nut 146d located above and below the valve slide plate 144 to adjust the distance between the valve slide plate 144 and the valve support plate 147, so as to perform Z-direction fine-tuning, which has the effect of simple, fast and convenient adjustment. Among them, the support plate 146b can prevent the Z-direction fine-tuning bolt 146 and the valve support plate 147 from loosening. In addition, the upper threaded rod of the Z-direction fine-tuning bolt 146 located above the support plate 146b of the second embodiment of the present invention is not exposed on the upper plane of the valve support plate 147, which can avoid the outer nut 146d at the upper end of the Z-direction fine-tuning bolt 146 in the first embodiment of the present invention from interfering with the valve installation position. Of course, under the premise that the installation position does not interfere, the connection relationship between the Z-direction fine-tuning bolt 146 and related components of the first and second embodiments of the present invention can be used interchangeably. The valve adjustment bracket 140 of the second embodiment of the present invention can fine-tune the valve in the X, Y and Z directions, thereby improving the installation accuracy of the valve. In addition, the fine-tune of the valve in the X, Y and Z directions is manually adjusted, and the valve of the accelerator cavity device is suitable for assembly in a clean room, and is less affected by environmental disturbances.

[0156] Please refer to Figures 1 to 6The accelerator cavity device assembly tool 100 of the embodiment of the present invention may also include a cavity distance controller 190. The cavity distance controller 190 may be arranged on the downstream cavity adjustment bracket 120 and the upstream cavity adjustment bracket 110 at the connection of adjacent segment cavities 91, so as to adjust the distance between the downstream cavity adjustment bracket 120 and the upstream cavity adjustment bracket 110 at the connection of adjacent segment cavities 91 in the X direction, thereby adjusting the distance between adjacent segment cavities 91 in the X direction. Of course, the cavity distance controller 190 may also be arranged between the valve adjustment bracket 140 of the upstream valve 96 and the upstream cavity adjustment bracket 110, so as to adjust the distance between the valve adjustment bracket 140 and the upstream cavity adjustment bracket 110 in the X direction, thereby adjusting the distance between the upstream valve 96 and the segment cavity 91 in the X direction. In addition, the cavity distance controller 190 can also be arranged between the downstream cavity adjustment bracket 120 and the monitoring adjustment bracket 160 to adjust the distance between the downstream cavity adjustment bracket 120 and the monitoring adjustment bracket 160 in the X direction, thereby adjusting the distance between the segment cavity 91 and the low temperature monitoring chamber 98 in the X direction. After the cavity distance controller 190 adjusts the distance, it is locked and fixed, so that the stability connection between the segment cavity 91 and the adjacent segment cavity 91, the upstream valve 96 and / or the low temperature monitoring chamber 98 can be protected. Through the distance adjustment of the cavity distance controller 190, the risk of damage caused by the excessive extension length of the bellows 99 at the connection of the accelerator cavity device 90 can also be prevented, thereby having the effect of protecting the bellows 99.

[0157] Please refer to Figure 31 to Figure 34 The cavity distance controller 190 of the embodiment of the present invention includes a first fixture and a second fixture adjustably connected to the first fixture along the X direction.

[0158] Please refer to Figure 31 to Figure 33 The first fixture includes a first fixture head 191 having a first fixture head groove 191a and a first fixture waist 192 having a first fixture waist groove 192a. The first fixture head 191 and the first fixture waist 192 are connected to a universal pillar 200 of one of the adjustment brackets through a first fastener 193 arranged along the X direction. The first fixture waist 192 is provided with a first avoidance groove 192b along the Y direction for avoiding the first fastener 193.

[0159] Please refer to Fig.31 and Fig.34The second fixture includes a second fixture head 194 with a second fixture head groove 194a and a second fixture waist 195 with a second fixture waist groove 195a. The second fixture head 194 and the second fixture waist 195 are connected to a universal pillar 200 of another adjustment bracket through a second fastener 196 arranged along the X direction. The second fixture waist 195 is provided with a second avoidance groove 195b along the Y direction to avoid the second fastener 196. The shapes of the first fixture waist groove 192a and the second fixture waist groove 195a match the outer contour of the column tube 202 on the universal pillar 200 connected to them.

[0160] Please refer to Figure 31 to Figure 32 The first fixture waist 192 and the second fixture waist 195 are adjustably connected along the X direction through a third fastener 197 arranged along the Z direction.

[0161] Please refer to Figure 31 to Figure 33 The first fixture waist 192 is provided with a first connection hole 192c passing through the third fastener 197 along the X direction; the second fixture waist 195 is provided with a second connection hole 195c passing through the third fastener 197 along the X direction.

[0162] Please refer to Fig.33 The first fixture waist 192 is provided with a first step surface 192d lower than its upper plane, and the first connecting hole 192c is provided on the first step surface 192d; please refer to Fig.34 The second fixture waist 195 is provided with a second step surface 195d higher than the lower plane thereof, and the second connecting hole 195c is provided on the second step surface 195d; please refer to Fig.31 After the first step surface 192d and the second step surface 195d are overlapped and connected, the total height along the Z direction is equal to or greater than the height of the first fixture waist 192 or the second fixture waist 195.

[0163] Please refer to Figure 31 to Figure 34 In the embodiment of the present invention, the first fastener 193, the second fastener 196 and the third fastener 197 are all bolts with nuts.

[0164] Please refer to Figures 1 to 6 , Figure 35 to Figure 37The base 180 of the embodiment of the present invention includes at least a section cavity bottom plate assembly 182, and may also include a valve bottom plate and / or a monitoring bottom plate 183. The valve bottom plate includes an upstream valve bottom plate 181 and a downstream valve bottom plate 184. Bottom plate regulators 185 may be provided between adjacent section cavity bottom plate assemblies 182, between the upstream valve bottom plate 181 and the section cavity bottom plate assembly 182, and between the section cavity bottom plate assembly 182 and the monitoring bottom plate 183. The upstream valve bottom plate 181, the section cavity bottom plate assembly 182, the monitoring bottom plate 183 and / or the downstream valve bottom plate 184 may be provided with a track locker 182d, and the track locker 182d is used to tighten or loosen the track platform (not shown) located below the corresponding bottom plate. That is, the track locker 182d presses the track platform when locked, and releases the track platform when unlocked, so that each base plate in the base 180 can be adjusted along the X direction separately or as a whole to improve the installation accuracy in the X direction.

[0165] Please refer to Figures 1 to 6 , Figure 35 to Figure 37 , the section cavity bottom plate assembly 182 includes:

[0166] The upstream cavity bottom plate 182a is arranged on the upstream cavity adjustment bracket 110 of the section cavity body 91; please refer to Figures 2 to 3 , Figure 5 to Figure 6 and Fig.12 The support chassis 201 of the upstream cavity adjustment bracket 110 can be connected to the upstream cavity bottom plate 182a through the chassis bolts 213, and the support chassis 201 is provided with a support chassis Y-direction adjustment hole 201a that passes through the chassis bolts 213 to connect to the upstream cavity bottom plate 182a, and the support chassis Y-direction adjustment hole 201a can be a waist-shaped hole. The setting of the support chassis Y-direction adjustment hole 201a can provide fine adjustment in the Y direction for the upstream cavity adjustment bracket 110, so as to improve the installation accuracy of the upstream cavity adjustment bracket 110 for installing and supporting the cavity body.

[0167] The downstream cavity bottom plate 182b is arranged on the downstream cavity adjustment bracket 120 of the section cavity 91; please refer to Figures 2 to 3 , Figure 5 to Figure 6 and Fig.12 The support chassis 201 of the downstream cavity adjustment bracket 120 is connected to the downstream cavity bottom plate 182b through the chassis bolt 213. The support chassis 201 is provided with a support chassis Y-direction adjustment hole 201a that passes through the chassis bolt 213 and is connected to the downstream cavity bottom plate 182b. The support chassis Y-direction adjustment hole 201a can be a waist-shaped hole. The setting of the support chassis Y-direction adjustment hole 201a can provide fine adjustment in the Y direction for the downstream cavity adjustment bracket 120, so as to improve the installation accuracy of the downstream cavity adjustment bracket 120 for installing and supporting the cavity body.

[0168] The fixing strip 182c is connected between the upstream cavity bottom plate 182a and the downstream cavity bottom plate 182b.

[0169] Please refer to Fig.36 The track locker 182d on the section cavity bottom plate assembly 182 can be set on the upstream cavity bottom plate 182a, the downstream cavity bottom plate 182b or a combination thereof.

[0170] Please refer to Figure 1 to Figure 2 , Figures 4 to 5 and Fig.35 , the upstream valve bottom plate 181 can be set on the valve adjustment bracket 140 of the upstream valve 96. Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 6 and Fig.37 , the downstream valve bottom plate 184 can be set on the valve adjustment bracket 140 of the downstream valve 97. Please refer to Figures 1 to 8 The valve bottom plate 141 on the valve adjustment bracket 140 is connected to the valve bottom plate through the bottom plate fixing bolts 149, wherein the valve bottom plate includes an upstream valve bottom plate 181 and a downstream valve bottom plate 184. The valve bottom plate 141 is provided with a valve bottom plate Y-direction adjustment hole 141a which passes through the bottom plate fixing bolts 149 to connect the valve bottom plate, and the valve bottom plate Y-direction adjustment hole 141a can be a waist-shaped hole. The arrangement of the valve bottom plate Y-direction adjustment hole 141a can provide the valve adjustment bracket 140 with fine adjustment in the Y direction to improve the installation accuracy of the upstream valve 96 or the downstream valve 97.

[0171] Please refer to Fig.35 and Fig.37 The track locker 182d may be disposed on the valve adjustment bracket 140 of the upstream valve 96 and / or the valve adjustment bracket 140 of the downstream valve 97 .

[0172] Please refer to Figure 1 , Figure 3 to Figure 4 , Figure 6 and Fig.37 The monitoring bottom plate 183 is arranged on the monitoring adjustment bracket 160 of the low temperature monitoring chamber 98. The monitoring bottom plate 183 is connected to the downstream valve bottom plate 184 through a fixing strip 182c. Figures 1 to 6 , Fig.11 and Fig.12 The support chassis 201 on the monitoring adjustment bracket 160 is provided with a support chassis Y-direction adjustment hole 201a that passes through the chassis bolt 213 and connects to the monitoring bottom plate 183. The support chassis Y-direction adjustment hole 201a can be a waist-shaped hole. The setting of the support chassis Y-direction adjustment hole 201a can provide fine adjustment in the Y direction for the monitoring adjustment bracket 160 to improve the installation accuracy of the low-temperature monitoring chamber.

[0173] Please refer to Fig.35 , Fig.37 and Fig.38 The bottom plate adjuster 185 of the embodiment of the present invention includes two fixedly arranged clamping seats 185a, a bottom plate adjusting bolt 185b arranged between the two clamping seats 185a, and bottom plate adjusting nuts 185c threadedly connected to the bottom plate adjusting bolt 185b and distributed on both sides of the clamping seats 185a. A washer may be arranged between the bottom plate adjusting nut 185c and the clamping seat 185a. The bottom plate adjusting bolt 185b is a stud bolt, and the clamping seat 185a is provided with a hole or a groove for fixing the bottom plate adjusting bolt 185b, such as a U-shaped clamping groove. Since the two holders 185a can be fixedly arranged on the upstream valve bottom plate 181 and the upstream cavity bottom plate 182a, and can be fixedly arranged on the downstream cavity bottom plate 182b and the monitoring bottom plate 183, respectively, by adjusting the position of the bottom plate adjusting nut 185c, the length of the bottom plate adjusting bolt 185b between the two holders 185a can be changed, so as to adjust the distance between the upstream valve bottom plate 181 and the section cavity bottom plate assembly 182 and between the section cavity bottom plate assembly 182 and the monitoring bottom plate 183 in the X direction, so as to achieve the purpose of adjustment in the X direction and improve the installation accuracy. The bottom plate adjuster 185 of the above structure can also be applied between the section cavity bottom plate assemblies 182.

[0174] Please refer to Fig.36 and Fig.39, the embodiment of the present invention provides another bottom plate adjuster 185, comprising two fixedly arranged bases 185a, a bottom plate adjusting nut 185c, a first screw rod 185d, a second screw rod 185e and a tension joint 185f. The thread direction of the first screw rod 185d is opposite to that of the second screw rod 185e, one end of the first screw rod 185d is fixed to both sides of one of the bases 185a through two bottom plate adjusting nuts 185c, and the other end of the first screw rod 185d is threadedly connected to the tension joint 185f; one end of the second screw rod 185e is fixed to both sides of the other base 185a through two bottom plate adjusting nuts 185c, and the other end of the second screw rod 185d is threadedly connected to the tension joint 185f. Since the two holders 185a can be fixedly arranged on the upstream cavity bottom plate 182a and the downstream cavity bottom plate 182b respectively, and since the thread directions of the first screw 185d and the second screw 185e are opposite, the length of the first screw 185d and the second screw 185e extending out of the elastic joint 185f can be adjusted simultaneously by rotating the elastic joint 185f in the clockwise direction or the counterclockwise direction, so as to change the distance between the two holders, so as to achieve the purpose of adjustment in the X direction and improve the installation accuracy. In order to facilitate the rotation of the elastic joint 185f, an adjustment hole 185g is provided on the circumference of the elastic joint 185f, and an adjustment rod is detachably connected to the adjustment hole 185g. The adjustment rod can be a threaded rod corresponding to the internal threaded hole of the adjustment hole 185g, or an insertion rod corresponding to the blind hole or through hole of the adjustment hole 185g. The elastic joint 185f can be rotated clockwise or counterclockwise by the adjustment rod. When the distance between the two clamping seats 185 is adjusted to the maximum value or the minimum value and still cannot meet the precision adjustment in the X direction, the distance between the two clamping seats 185a is changed again by adjusting the position of the bottom plate adjusting nut 185c. Therefore, the bottom plate adjuster 185 of this structure has a wider range of adjustment space. In addition, the bottom plate adjuster 185 of this structure is also suitable for the space between the upstream valve bottom plate 181 and the upstream cavity bottom plate 182a and the space between the downstream cavity bottom plate 182b and the monitoring bottom plate 183.

[0175] Please refer to Figures 1 to 6 , Figure 35 to Figure 37 and Fig.40, the track locker 182d can be locked on the track platform (not shown) located below the base 180. The track locker 182d includes a pressure seat 182d1, a pressure hand 182d2 hinged on the pressure seat 182d1, and a connecting rod 182d3. A pressure rod 182d4 is vertically arranged on the connecting rod 182d3, and the pressure rod 182d4 can be a rubber piece. When the pressure hand 182d2 is pressed down, the pressure rod is vertically pressed on the track platform to lock; when the pressure hand 182d2 is lifted, the pressure rod 182d4 is not in contact with the track platform and is unlocked, and the entire base 180 can be moved in the X direction along the track platform, thereby improving the installation accuracy. When the track locker 182d is arranged on the upstream valve bottom plate 181, the upstream cavity bottom plate 182a, the downstream cavity bottom plate 182b, the monitoring bottom plate 183 and / or the downstream valve bottom plate 184, a pressure hole 182e can be arranged on the corresponding bottom plate for the pressure rod 182d4 to pass through and expose the track platform, so that the pressure rod 182d4 can lock or unlock the track platform, and the pressure rod 182d4 can also be extended from the corresponding bottom plate to lock or unlock the track platform.

[0176] Please refer to Figures 1 to 6 and Fig.18 In order to further improve the installation accuracy of the section cavity, a rotating frame bottom plate is connected to the rotating frame chassis 131 of the rotation angle fine-tuning bracket 130 through a disc bolt 139. An upstream cavity bottom plate 182a that is in the same plane as the rotating frame bottom plate can be set below the upstream cavity adjustment bracket 110, and a downstream cavity bottom plate 182b that is in the same plane as the rotating frame bottom plate can be set below the downstream cavity adjustment bracket 120. The rotating frame bottom plate can be set separately or shared with the upstream cavity bottom plate 182a or the downstream cavity bottom plate 182b. The rotating frame chassis Y-direction adjustment hole 131a, such as a waist-shaped hole, is set at the position of the disc bolt 139 corresponding to the rotating frame chassis 131 to achieve fine-tuning in the Y direction, thereby improving the installation accuracy of the rotation angle fine-tuning bracket.

[0177] The upstream cavity adjustment bracket 110, the downstream cavity adjustment bracket 120, the rotation angle fine-tuning bracket 130, the valve adjustment bracket 140, the coupler locking device 150, the monitoring adjustment bracket 160, the coupler mounting bracket 170, the base 180 and the cavity distance controller 190 of the embodiment of the present invention are suitable for assembling the section cavity, the low-temperature monitoring chamber and the valve of the accelerator cavity device in an ultra-clean room, and are less affected by environmental disturbances.

[0178] The accelerator cavity device assembly method of the free electron laser device of the embodiment of the present invention adopts the accelerator cavity device assembly tool 100 of the free electron laser device of the above embodiment. It includes:

[0179] Step 301, adjust the horizontality and height of the section cavity 91 through the upstream cavity adjustment bracket 110 and the downstream cavity adjustment bracket 120, so that the axis centers of multiple section cavities 91 reach coaxiality. The specific adjustment method is as follows: use one of the upstream cavity adjustment bracket 110 and the downstream cavity adjustment bracket 120 as the reference point to adjust the other bracket; when the downstream cavity adjustment bracket 120 includes an arcuate rib 121d, the elevation of the downstream cavity adjustment bracket 120 is used as the reference datum. Since the arcuate rib 121d can be engaged in the groove of the downstream end 93 of the section cavity 91 to achieve a reliable connection between the downstream cavity support plate 121 and the downstream end 93 of the section cavity 91, the downstream cavity adjustment bracket 120 has a higher accuracy as a reference datum.

[0180] Step 302, adjusting the rotation angle (ie, the torsion degree) of each segment cavity 91 by rotating the angle fine-tuning bracket 130, so that the angle of each segment cavity 91 reaches the position requirement;

[0181] Step 303 , adjacent segment cavities 91 are connected and assembled through bellows 99 to form a cavity string.

[0182] When assembling the cavity string, the distance between the downstream cavity bottom plate 184 and the upstream cavity bottom plate 181 of the adjacent section cavity 91 is adjusted in the X direction through the bottom plate adjuster 185 of the base 180 to adjust the distance between the downstream cavity adjustment bracket 120 and the upstream cavity adjustment bracket 110 of the adjacent section cavity 91, thereby adjusting the position of the connection between the adjacent section cavity 91, and then locked and fixed on the downstream cavity adjustment bracket 120 and the upstream cavity adjustment bracket 110 through the cavity distance controller 190 to fix the position of the connection between the adjacent section cavity 91.

[0183] Step 304, the horizontality and height of the vacuum tube in the low temperature monitoring chamber 98 are adjusted by the monitoring adjustment bracket 160, so as to adjust the axis center of the vacuum tube to the axis center of the above-mentioned cavity string to achieve coaxiality, so as to assemble the segment cavity 91 and the vacuum tube and the low temperature monitoring chamber 98 sleeved on the vacuum tube through the bellows 99. At this time, the distance between the monitoring bottom plate 183 and the downstream cavity bottom plate 182b can be adjusted in the X direction by the bottom plate adjuster 185 of the base 180, so as to adjust the distance between the monitoring adjustment bracket 160 and the downstream cavity adjustment bracket 120, thereby adjusting the position between the low temperature monitoring chamber 98 and the segment cavity 91, and then the cavity distance controller 190 is locked and fixed on the monitoring adjustment bracket 160 and the downstream cavity adjustment bracket 120 to fix the position between the low temperature monitoring chamber 98 and the segment cavity 91. More precisely, the position between the vacuum tube in the low temperature monitoring chamber 98 and the segment cavity 91 is fixed.

[0184] Step 305, the upstream valve 96 and the downstream valve 97 are fixedly connected by the valve adjustment bracket 140 respectively; the horizontality and height of the valve are adjusted by the valve adjustment bracket 140 so that the axis center of the upstream valve 96 and the downstream valve 97 are coaxial with the axis center of the above-mentioned cavity string, so as to assemble the upstream valve 96 with the cavity string through the bellows 99 and assemble the downstream valve 97 with the vacuum tube and the low temperature monitoring chamber 98 sleeved on the vacuum tube. At this time, the distance between the upstream valve bottom plate 181 and the upstream cavity bottom plate 182a can be adjusted in the X direction by the bottom plate regulator 185 of the base 180 to adjust the distance between the valve adjustment bracket 140 and the upstream cavity adjustment bracket 110, thereby adjusting the position between the upstream valve 96 and the section cavity 91, and then the cavity distance controller 190 is used to lock and fix it on the valve adjustment bracket 140 and the upstream cavity adjustment bracket 110 to fix the position between the upstream valve 96 and the section cavity 91.

[0185] The above steps 304 and 305 may also be performed before step 301 .

[0186] Step 306 , installing the coupler 95 onto the cold end 94 of the segment cavity 91 via the coupler mounting bracket 170 to complete the assembly of the coupler 95 .

[0187] Step 307 , remove the coupler mounting bracket 170 , and lock and fix the coupler 95 on the cold end 94 of the segment cavity 91 by the coupler locking device 150 .

[0188] The assembly tool of the embodiment of the present invention can realize the overall installation of the accelerator cavity device, and can also realize the partial installation of the accelerator cavity device. The installation position can be repeatedly adjusted multiple times according to the actual working conditions.

[0189] The present invention is not limited to the above-mentioned specific embodiments, and all changes and modifications made within the claims of the present invention are within the protection scope of the present invention.

Claims

1. An accelerator cavity device assembly tool for a free electron laser device, characterized in that: include: An upstream cavity adjustment bracket, a downstream cavity adjustment bracket and a rotation angle fine-adjustment bracket; The upstream cavity adjustment bracket and the downstream cavity adjustment bracket both include a universal pillar and a support plate located on the universal pillar; the universal pillar includes a pillar chassis, a pillar tube vertically connected to the pillar chassis, the pillar tube is threadedly connected to an axial adjustment screw extending into the pillar tube through a flange, the axial adjustment screw is threadedly connected to an axial locking nut located above the flange, the axial adjustment screw is connected to a U-shaped bracket through a nut, a bearing plate is provided on the U-shaped bracket, bearing side plates are provided on both sides of the bearing plate, and a Y-direction fine-tuning screw for fine-tuning the position of the support plate in the Y direction is provided on the bearing side plate; the support plate includes a cross plate and A vertical plate vertically connected to the horizontal plate, the vertical plate is provided with a lower semicircular arc groove, the horizontal plate is threadedly connected to the bearing threaded hole of the bearing plate through a fixing bolt and an adjusting washer thereon, and the horizontal plate is also threadedly connected with a Z-direction fine-tuning screw and abuts against the upper surface of the bearing plate; the Y-direction fine-tuning screw abuts against the side walls of the horizontal plate or the vertical plate at both ends of the Y direction, and is used to fine-tune the position of the support plate 111 in the Y direction; in the downstream cavity adjustment bracket, the lower semicircular arc groove matching along the downstream end is provided with an arc convex rib; in the through pillar, the column tube is provided with a radial locking screw in the radial direction that extends into the column tube and is used to lock the lower smooth surface section of the axial adjustment screw; The rotation angle fine-tuning bracket includes a rotating frame chassis, a rotating frame pillar vertically connected to the rotating frame chassis, a flat plate vertically arranged on the rotating frame pillar, and vertical plates arranged at both ends of the flat plate in the Y direction. The distance between the two vertical plates in the Y direction is greater than or equal to the diameter of the section cavity of the accelerator cavity device. The vertical plate is sequentially provided with a first through hole and a second through hole from top to bottom. The two ends of the vertical plate in the X direction are provided with hanging ear fixing bolts passing through the first through holes to fix the hanging ears of the section cavity of the accelerator cavity device at both ends in the X direction. The two ends of the vertical plate in the Z direction are provided with angle adjustment bolts passing through the first through holes to fix the hanging ears of the section cavity of the accelerator cavity device at both ends in the Z direction.

2. The accelerator cavity device assembly tool for a free electron laser device according to claim 1, characterized in that: The accelerator cavity device assembly tool also includes: A monitoring and adjusting bracket, wherein the monitoring and adjusting bracket has the same structure as the upstream cavity adjusting bracket, and the arc-shaped groove in the lower half of the circle matches the low-temperature monitoring chamber of the accelerator cavity device.

3. The accelerator cavity device assembly tool for a free electron laser device as claimed in claim 2, characterized in that: The accelerator cavity device assembly tool also includes: The valve adjustment bracket includes: a valve base, a valve support vertically connected to the valve base, a valve top plate vertically connected to the upper end of the valve support, the valve top plate is connected to the valve slide plate through a slide plate bolt and a slide plate adjustment gasket thereon, a threaded hole is arranged on the valve top plate corresponding to the slide plate bolt position, a horizontal adjustment hole is arranged on the valve slide plate corresponding to the slide plate bolt position, valve X-direction side plates are arranged at both ends of the valve slide plate in the X direction, a valve X-direction horizontal fine-tuning bolt is arranged on the valve X-direction side plate, the opposite end of the screw head of the valve X-direction horizontal fine-tuning bolt abuts against the side wall of the valve top plate, the valve slide plate is connected to the valve support plate through the valve Z-direction fine-tuning bolt, and the valve support plate is provided with a valve bolt for fixing the valve of the accelerator cavity device.

4. The accelerator cavity device assembly tool for a free electron laser device as claimed in claim 3, characterized in that: In the valve adjustment bracket, there are two valve Z-direction fine-tuning bolts, which are distributed at both ends of the valve slide in the Y direction; Or in the valve adjustment bracket, there are four valve Z-direction fine-tuning bolts distributed at the corners of the valve slide plate; valve Y-direction side plates are provided at both ends of the valve slide plate in the Y direction, and valve Y-direction horizontal fine-tuning bolts are provided on the valve Y-direction side plates, and the opposite ends of the screw heads of the valve Y-direction horizontal fine-tuning bolts are against the side walls of the valve top plate.

5. The accelerator cavity device assembly tool for a free electron laser device as claimed in claim 3, characterized in that: The accelerator cavity device assembly tool also includes: A base, the base comprising: A section cavity bottom plate assembly connected between the upstream cavity adjustment bracket and the downstream cavity adjustment bracket in the same section cavity; The section cavity bottom plate assembly comprises: An upstream cavity bottom plate is arranged on an upstream cavity adjustment bracket of the section cavity body; A downstream cavity bottom plate is arranged on a downstream cavity adjustment bracket of the section cavity body; A fixing strip is connected between the upstream cavity bottom plate and the downstream cavity bottom plate.

6. The accelerator cavity assembly tool for a free electron laser device as claimed in claim 5, characterized in that: The base also includes a monitoring bottom plate and a valve bottom plate, the valve bottom plate includes an upstream valve bottom plate arranged on the upstream chamber bracket and a downstream valve bottom plate arranged on the downstream chamber bracket, the monitoring bottom plate is arranged on the monitoring adjustment bracket, and the monitoring bottom plate is connected to the downstream valve bottom plate by a fixing strip.

7. The accelerator cavity device assembly tool for a free electron laser device as claimed in claim 6, characterized in that: The upstream cavity adjustment bracket is adjustable along the Y direction on the upstream cavity bottom plate by means of a chassis bolt passing through a Y direction adjustment hole of the support chassis provided on the support chassis; The downstream cavity adjustment bracket is adjustable along the Y direction on the bottom plate of the downstream cavity by means of a chassis bolt passing through a Y-direction adjustment hole of the support chassis provided on the support chassis; The monitoring adjustment bracket is adjustable along the Y direction on the monitoring bottom plate by means of a chassis bolt passing through a Y direction adjustment hole of the support bottom plate provided on the support bottom plate; The rotation angle fine-adjustment bracket is adjustable along the Y direction on the rotating frame bottom plate by means of a disc bolt passing through a Y-direction adjustment hole of the rotating frame bottom plate provided on the rotating frame bottom plate; The valve adjustment bracket is adjustable along the Y direction by means of chassis fixing bolts passing through the valve chassis Y-direction adjustment holes arranged on the valve chassis, and is respectively arranged on the upstream valve bottom plate and the downstream valve bottom plate.

8. The accelerator cavity device assembly tool for a free electron laser device according to claim 6 or 7, characterized in that: Bottom plate regulators are provided between adjacent section cavity bottom plate assemblies, between the upstream valve bottom plate and the section cavity bottom plate assembly, and / or between the section cavity bottom plate assembly and the monitoring bottom plate.

9. The accelerator cavity assembly tool for a free electron laser device as claimed in claim 8, characterized in that: The bottom plate adjuster comprises two fixedly arranged clamping seats, a bottom plate adjusting bolt arranged between the two clamping seats, and a bottom plate adjusting nut threadedly connected to the bottom plate adjusting bolt and distributed on both sides of the clamping seats; Alternatively, the base plate adjuster includes two fixedly arranged bases, a base plate adjusting nut, a first screw, a second screw and a tension joint, the thread directions of the first screw and the second screw are opposite, one end of the first screw is fixed to the two sides of one of the bases through the two base plate adjusting nuts, and the other end of the first screw is threadedly connected to the tension joint; one end of the second screw is fixed to the two sides of the other base through the two base plate adjusting nuts, and the other end of the second screw is threadedly connected to the tension joint.

10. The accelerator cavity device assembly tool for a free electron laser device according to claim 9, characterized in that: A track platform for movement in the X direction is arranged below the base, and a track locker for locking or unlocking the track platform is arranged on the base; the track locker comprises a pressure seat, a pressure hand hinged on the pressure seat and a connecting rod, and a pressure rod is vertically arranged on the connecting rod.

11. The accelerator cavity assembly tool for a free electron laser device according to claim 5, characterized in that: The accelerator cavity device assembly tool also includes: A cavity distance controller is arranged between the downstream cavity adjustment bracket and the upstream cavity adjustment bracket at the connection between adjacent cavity sections, between the valve adjustment bracket of the upstream valve and the upstream cavity adjustment bracket, and / or between the downstream cavity adjustment bracket and the monitoring adjustment bracket.

12. The accelerator cavity device assembly tool for a free electron laser device according to claim 11, characterized in that: The cavity distance controller comprises: a first fixture and a second fixture adjustably connected to the first fixture along the X direction; The first fixture comprises a first fixture head having a first fixture head groove and a first fixture waist having a first fixture waist groove, the first fixture head and the first fixture waist are connected to a common support column of one of the adjustment brackets through a first fastener arranged along the X direction, and a first avoidance groove for avoiding the first fastener is arranged on the first fixture waist along the Y direction; The second fixture comprises a second fixture head having a second fixture head groove and a second fixture waist having a second fixture waist groove, the second fixture head and the second fixture waist are connected to a universal support column of another adjustment bracket through a second fastener arranged along the X direction, and a second avoidance groove for avoiding the second fastener is arranged on the second fixture waist along the Y direction; The first fixture waist and the second fixture waist are adjustably connected along the X direction via a third fastener arranged along the Z direction.

13. The accelerator cavity device assembly tool for a free electron laser device according to claim 1 or 11, characterized in that: The accelerator cavity device assembly tool also includes: The coupler mounting bracket comprises a bracket chassis, a bracket column, a height adjustment mechanism and a horizontal adjustment mechanism which are arranged in sequence, and a large flange fixture for mounting the coupler and a small flange fixture with adjustable height which are arranged on the horizontal adjustment mechanism.

14. The accelerator cavity assembly tool for a free electron laser device according to claim 13, characterized in that: In the coupler mounting bracket, the height adjustment mechanism comprises a lower adjustment plate arranged on the bracket column, and the lower adjustment plate is connected to the upper adjustment plate via height adjustment bolts; And / or in the coupler mounting bracket, the horizontal adjustment mechanism includes a fixed plate arranged on the height adjustment mechanism through a plate adjustment bolt, and the fixed plate is provided with a slide plate which moves in the Y direction relative to the fixed plate; a guide side plate is provided on the side wall of the fixed plate, and the guide side plate is threadedly connected in the X direction or abuts against the fixed plate through an X-direction adjustment bolt.

15. The accelerator cavity assembly tool for a free electron laser device according to claim 14, characterized in that: In the coupler mounting bracket, the fixing plate is provided with at least two parallel guide rails in the Y direction, and the slide plate is provided with a slide groove matching the guide rails; And / or in the coupler mounting bracket, the fixing plate is provided with at least two parallel guide wheels in the Y direction, and the slide plate is provided with a slide groove matching the guide wheels.

16. The accelerator cavity assembly tool for a free electron laser device according to claim 14, characterized in that: In the coupler mounting bracket, the large flange clamp comprises a lower clamp having a lower clamping opening fixedly connected to the slide plate, and an upper clamp having an upper clamping opening connected to the lower clamp by clamp bolts, wherein the upper clamping opening of the upper clamp and the lower clamping opening of the lower clamp are used to fix the large flange of the coupler; And / or in the coupler mounting bracket, the small flange clamp includes a Z-shaped plate arranged on a horizontal adjustment mechanism, the Z-shaped plate is adjustably connected to a small flange support plate in the Z direction through a small flange adjustment rod, and the small flange support plate is provided with a groove for supporting the small flange of the coupler.

17. The accelerator cavity assembly tool for a free electron laser device according to claim 14, characterized in that: In the coupler mounting bracket, the fixing plate is provided with a Y-direction limiting mechanism for limiting the moving position of the slide plate along the Y direction, the Y-direction limiting mechanism comprises a limiting block provided on the fixing plate, a Y-direction limiting bolt is provided through the limiting block in the Y direction, and the Y-direction limiting bolt is threadedly connected or abuts against the slide plate; And / or the coupler mounting bracket further includes a Z-direction limiting mechanism, and the Z-direction limiting mechanism includes a Z-direction limiting bolt that vertically passes through the slide plate and is threadedly connected or abuts against the fixed plate.

18. The accelerator cavity assembly tool for a free electron laser device according to claim 13, characterized in that: The coupler mounting bracket also includes a lock vertically arranged on the bracket column, the lock includes a first lock plate and a second lock plate connected to the first lock plate via a lock plate bolt, and the first lock plate and the second lock plate are respectively provided with grooves for fixing on the column.

19. The accelerator cavity device assembly tool for a free electron laser device according to claim 1 or 11, characterized in that: The accelerator cavity device assembly tool also includes: A coupler locking device comprises a lower truss and an upper truss arranged in parallel along the Y direction, wherein the lower truss is provided with vertical bolts for fixing the coupler in the radial direction, and the vertical bolts include a first vertical bolt for fixing the small flange of the coupler in the radial direction and a second vertical bolt for fixing the large flange of the coupler in the radial direction; an end plate is arranged perpendicular to the upper truss, and the end plate is provided with transverse bolts for fixing the large flange of the coupler in the axial direction.

20. The accelerator cavity device assembly tool for a free electron laser device according to claim 19, characterized in that: In the coupler locking device, the lower truss is provided with lower waist-shaped holes for respectively passing the first vertical bolt and the second vertical bolt, and the end plate of the upper truss is provided with upper waist-shaped holes for passing the transverse bolt, and the lower waist-shaped holes and the upper waist-shaped holes are distributed along the X direction.

21. A method for assembling an accelerator cavity device of a free electron laser device, characterized in that: An accelerator cavity device assembly tool for a free electron laser device as claimed in claim 1, 13 or 19; The horizontality and height of the section cavity are adjusted by the upstream cavity adjustment bracket and the downstream cavity adjustment bracket, so that the axis centers of the multiple section cavities reach coaxiality; The rotation angle of each section cavity is adjusted by rotating the angle fine-tuning bracket so that the angle of each section cavity meets the position requirement; Adjacent section cavities are assembled through bellows to form a cavity string.

22. The method for assembling an accelerator cavity device of a free electron laser device according to claim 21, characterized in that: The horizontality and height of the vacuum tube in the low-temperature monitoring chamber are adjusted by monitoring the adjustment bracket to adjust the axis center of the vacuum tube to the axis center of the cavity string to achieve coaxiality, so as to assemble the cavity string and the vacuum tube and the low-temperature monitoring chamber sleeved on the vacuum tube through the bellows; The upstream valve and the downstream valve are fixedly connected by the valve adjustment bracket respectively, and the horizontality and height of the valve are adjusted by the valve adjustment bracket so that the axial centers of the upstream valve and the downstream valve are coaxial with the axial center of the above-mentioned cavity string, so that the upstream valve and the cavity string can be assembled through the bellows, and the downstream valve and the vacuum tube and the low-temperature monitoring chamber sleeved on the vacuum tube can be assembled.

23. The method for assembling an accelerator cavity device of a free electron laser device according to claim 21, characterized in that: Install the coupler to the cold end of the section cavity through the coupler mounting bracket to complete the assembly of the coupler; Remove the coupler mounting bracket and lock the coupler to the cold end of the section cavity using the coupler locking device.

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