Three-dimensional adjustable support device for particle accelerator deflection magnets

Abstract

The present application relates to a kind of three-dimensional adjustable support device for particle accelerator deflection magnet, comprising: support component, with at least four machining planes, four machining planes are two groups, two groups of machining planes are respectively arranged at the two ends of support component, and the two machining planes of each group are symmetrically arranged with the central axis of support component;Three-dimensional adjustable support module, four three-dimensional adjustable support modules are respectively arranged on the four machining planes of support component;The three-dimensional adjustable support module is used for the accurate adjustment of deflection magnet in X, Y and Z direction;Deflection magnet, between four three-dimensional adjustable support modules, four positions on the deflection magnet corresponding to the three-dimensional adjustable support module are fixedly provided with transition plate;Flange shaft, its first end is fixedly connected with the transition plate, and its second end is connected with the three-dimensional adjustable support module.

Description

Technical Field

[0001] This invention relates to the fields of medical and irradiation technology, and more specifically to a three-dimensional adjustable support device for deflecting magnets in particle accelerators. Background Technology

[0002] Radiotherapy is a very popular technique for cancer treatment worldwide, and protons and heavy ions are the most commonly used ion therapy methods for cancer treatment.

[0003] When using ion beam therapy for cancer, if only one direction of irradiation is used, the normal cells between the skin and the tumor will receive at least 1 / 3 of the tumor radiation dose, causing varying degrees of damage. In order to reduce this damage and increase the foci-to-skin ratio of the treatment, a course of treatment needs to be irradiated from different directions, dividing the total dose into multiple irradiation directions. In this way, the dose received by normal tissues is greatly reduced.

[0004] As a key component of accelerators, deflection magnets in existing multi-angle treatment fixed beamlines are usually adjusted using shims or screws. This results in poor adjustment accuracy, low stability, inability to adjust continuously, and easy variation in degrees of freedom, which directly affects the performance of the entire system. Therefore, there is an urgent need to propose a deflection magnet adjustment device that can solve the above problems and achieve precise adjustment of the spatial position of the deflection magnet to meet the optical requirements of a good beam. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a three-dimensional adjustable support device for deflecting magnets in particle accelerators, which can accurately and reliably achieve precise adjustment of the deflecting magnets in the X, Y, and Z directions. By adjusting the spatial position of the deflecting magnets, a precise magnetic field is generated to achieve precise control of the beam trajectory.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The present invention discloses a three-dimensional adjustable support device for a particle accelerator deflecting magnet, comprising: a support assembly having at least four processing planes, the four processing planes being arranged in pairs, the two groups of processing planes being respectively disposed at both ends of the support assembly, and the two processing planes in each group being symmetrically arranged about the central axis of the support assembly; three-dimensional adjustable support modules, four of which are respectively disposed on the four processing planes of the support assembly; the three-dimensional adjustable support modules are used for precise adjustment of the deflecting magnet in the X, Y, and Z directions; a deflecting magnet disposed between the four three-dimensional adjustable support modules, and four transition plates are respectively fixedly disposed at four positions on the deflecting magnet corresponding to the three-dimensional adjustable support modules; and a flange shaft, the first end of which is fixedly connected to the transition plate, and the second end of which is connected in cooperation with the three-dimensional adjustable support module.

[0008] Preferably, the three-dimensional adjustable support device includes a horizontal adjustment component and a vertical adjustment component, with the bottom of the horizontal adjustment component fixedly connected to the top of the vertical adjustment component; the horizontal adjustment component is used for precise adjustment of the deflection magnet in the X and Z directions; and the vertical adjustment component is used for precise adjustment of the deflection magnet in the Y direction.

[0009] Preferably, the horizontal adjustment component of the three-dimensional adjustable support device includes: a horizontal adjustment base plate, a spherical bearing support seat, an inner spherical bearing ring, an outer spherical bearing ring, a bearing cover, a shaft end baffle, and an adjustment bolt assembly; the horizontal adjustment base plate is fixedly disposed on the top of the vertical adjustment assembly; the spherical bearing support seat is fixedly disposed on the top of the horizontal adjustment base plate, and the spherical bearing support seat has a structure with machined planes at both ends and an arc-shaped groove in the middle; the bearing cover has a structure with machined planes at both ends and an arched groove in the middle, the bearing cover is fastened to the spherical bearing support seat, and the machined planes of the bearing cover and the spherical bearing support seat are connected by bearing cover connecting bolts; the size of the arched groove is adapted to the size of the arc-shaped groove, so that a space is formed between the bearing cover and the spherical bearing support seat to accommodate the outer ring of the spherical bearing. The cavity; the outer ring of the spherical plain bearing is disposed within the cavity and transitionally fits with the arc-shaped groove. The outer ring of the spherical plain bearing is fixed to the bearing cover by a plurality of bearing cover set screws to achieve radial positioning of the outer ring of the spherical plain bearing; the inner ring of the spherical plain bearing is disposed within the outer ring of the spherical plain bearing and is clearance-fitted with the outer ring of the spherical plain bearing; the inner ring of the spherical plain bearing is sleeved on the flange shaft and is clearance-fitted with the flange shaft; the shaft end baffle is connected to the shaft end face of the flange shaft by shaft end baffle fixing bolts; the horizontal adjustment base plate is provided with adjusting ears on two short sides and one long side respectively. Two adjusting bolt assemblies pass through the two adjusting ears on the short sides and contact the two ends of the spherical plain bearing support seat to achieve adjustment of the deflection magnet in the X direction. One adjusting bolt assembly passes through the adjusting ear on the long side and contacts the outer surface of the shaft end baffle to achieve adjustment of the deflection magnet in the Z direction.

[0010] Preferably, the horizontal adjustment component of the three-dimensional adjustable support device further includes a friction-reducing plate, which is fixed to the upper surface of the horizontal adjustment base plate by friction-reducing plate fixing screws to reduce friction and improve adjustment efficiency.

[0011] Preferably, the vertical adjustment component of the three-dimensional adjustable support device includes: an outer frame, an upper inclined block, a lower inclined block, a rhomboid bearing seat, a lead screw, a slider, and a guide rail; the bottom of the outer frame is fixed to the machining plane of the support component by fastening bolts; the two rhomboid bearing seats are symmetrically fixed to the two short sides of the outer frame by rhomboid bearing seat fixing bolts; the guide rail is fixed to the bottom inside the outer frame by guide rail fixing bolts; the slider is mounted on the guide rail with clearance fit; the lower inclined block is fixedly connected to the top of the slider by a lower inclined block connecting screw; the lead screw passes through the lower inclined block and the two rhomboid bearing seats to form a lead screw nut pair; the upper inclined block is disposed above the lower inclined block and is connected to the lower inclined block; a plurality of guide rods are provided on the outer edge of the upper inclined block, and a plurality of countersunk holes are provided on the top of the outer frame, the guide rods extending into the countersunk holes to realize the linear Y-axis movement of the upper inclined block when driven by the lead screw nut pair.

[0012] Preferably, in the three-dimensional adjustable support device, the bottom of the upper inclined block has a wedge-shaped surface, and the top of the lower inclined block has a wedge-shaped surface in the opposite direction to that of the upper inclined block.

[0013] Preferably, the three-dimensional adjustable support device has guide grooves on the wedge-shaped surfaces of the upper inclined block and the lower inclined block, and the guide grooves of the upper inclined block and the lower inclined block are staggered.

[0014] Preferably, the ends of the lead screw on both sides are milled square or machined with keyways.

[0015] Preferably, in the three-dimensional adjustable support device, the transition plate and the deflection magnet are fixed together by a magnet connecting bolt.

[0016] Preferably, in the three-dimensional adjustable support device, the bottom of the horizontal adjustment component and the top of the vertical adjustment component are fixedly connected by connecting bolts.

[0017] The present invention has the following advantages due to the adoption of the above technical solutions:

[0018] (1) The present invention uses at least four sets of three-dimensional adjustable support modules, in conjunction with collimation measurement equipment, to allow manual or electric remote adjustment of the spatial position of the deflection magnet;

[0019] (2) It has high adjustment accuracy and good structural rigidity. It achieves mutual coupling in three directions through joint bearings, and has good adaptability to various postures of the deflecting magnet.

[0020] (3) This invention is applicable to flat, climbing and horizontal deflection magnet support, and is a universal solution. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall structure of the three-dimensional adjustable support module in this invention;

[0024] Figure 3 This is an exploded view of the horizontal adjustment component of the present invention;

[0025] Figure 4 This is an assembly diagram of the horizontal adjustment component of the present invention;

[0026] Figure 5 This is an exploded view of the vertical adjustment component of the present invention;

[0027] Figure 6 This is an assembly diagram of the vertical adjustment component of the present invention.

[0028] The markings in the attached diagram are as follows:

[0029] 1-Transition plate; 2-Magnetic connecting bolt; 3-Flange shaft; 4-Support assembly; 5-Leveling adjustment assembly; 501-Bearing cover connecting bolt; 502-Bearing cover; 503-Bearing cover set screw; 504-Spherical plain bearing support seat; 505-Adjusting bolt assembly; 506-Shaft end baffle fixing bolt; 507-Shaft end baffle; 508-Leveling adjustment base plate; 509-Anti-friction plate fixing screw; 510-Anti-friction plate; 511 - Inner ring of spherical plain bearing; 512 Outer ring of spherical plain bearing; 6 Vertical adjustment assembly; 601 Upper inclined block; 602 Lower inclined block; 603 Rhomboid bearing seat fixing bolt; 604 Rhomboid bearing seat; 605 Slider; 606 Outer frame; 607 Guide rail fixing bolt; 608 Guide rail; 609 Lead screw; 610 Lower inclined block connecting screw; 611 Guide rod; 7 Fastening bolt; 8 Connecting bolt; 9 Deflection magnet. Detailed Implementation

[0030] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0031] This invention provides a three-dimensional adjustable support device for a particle accelerator deflector magnet. The device achieves linear adjustment of the deflector magnet in the X and Z directions through a horizontal adjustment component and linear adjustment of the deflector magnet in the Y direction through a vertical adjustment component, thereby achieving precise control of the beam trajectory.

[0032] like Figure 1 As shown, the three-dimensional adjustable support device for deflecting magnets in particle accelerators provided by the present invention includes: a support component 4 having at least four processing planes, the four processing planes being arranged in pairs, the two groups of processing planes being respectively disposed at both ends of the support component 4, and the two processing planes in each group being symmetrically arranged about the central axis of the support component 4; three-dimensional adjustable support modules, the four three-dimensional adjustable support modules being respectively disposed on the four processing planes of the support component 4, specifically, the three-dimensional adjustable support modules being fixed to the processing planes by fastening bolts 7; the three-dimensional adjustable support modules being used for precise adjustment of the deflecting magnets in the X, Y, and Z directions; deflecting magnets 9 being disposed between the four three-dimensional adjustable support modules, and four positions on the deflecting magnets corresponding to the three-dimensional adjustable support modules being fixedly disposed (fixed by magnet connecting bolts 2) with transition plates 1; and a flange shaft 3, the first end of which is fixedly connected to the transition plate 1, and the second end of which is connected to the three-dimensional adjustable support modules.

[0033] In the above embodiments, preferably, as follows: Figure 2 As shown, the three-dimensional adjustable support module includes a horizontal adjustment component 5 and a vertical adjustment component 6. The bottom of the horizontal adjustment component 5 is fixedly connected to the top of the vertical adjustment component 6, specifically, the two are fixed by connecting bolts 8. The horizontal adjustment component 5 is used for precise adjustment of the deflection magnet in the X and Z directions; the vertical adjustment component 6 is used for precise adjustment of the deflection magnet in the Y direction.

[0034] In the above embodiments, preferably, as follows: Figure 3 and Figure 4 As shown, the horizontal adjustment assembly 5 includes: a horizontal adjustment base plate 508, a spherical bearing support seat 504, a spherical bearing inner ring 511, a spherical bearing outer ring 512, a bearing cover 502, a shaft end baffle 507, and an adjustment bolt assembly 505; the horizontal adjustment base plate 508 is fixedly disposed on the top of the vertical adjustment assembly 6; the spherical bearing support seat 504 is fixedly disposed on the top of the horizontal adjustment base plate 508, and the spherical bearing support seat 504 has a structure with machined flat surfaces at both ends and an arc-shaped groove in the middle;

[0035] The bearing cover 502 has a structure with machined flat surfaces at both ends and an arched groove in the middle. The bearing cover 502 is fastened to the spherical plain bearing support 504, and the machined flat surfaces of the bearing cover 502 and the spherical plain bearing support 504 are connected by bearing cover connecting bolts 501. The size of the arched groove is adapted to the size of the arc-shaped groove so that a cavity for accommodating the outer ring 512 of the spherical plain bearing is formed between the bearing cover 502 and the spherical plain bearing support 504.

[0036] The outer ring 512 of the spherical plain bearing is disposed within the cavity and transitionally fits with the arc-shaped groove. The outer ring 512 of the spherical plain bearing is fixed to the bearing cap 502 by a number of bearing cap set screws 503 to achieve radial positioning of the outer ring of the spherical plain bearing. The inner ring 511 of the spherical plain bearing is disposed within the outer ring 512 of the spherical plain bearing and is clearance-fitted with the outer ring 512 of the spherical plain bearing. The inner ring 511 of the spherical plain bearing is sleeved on the flange shaft 3 and is clearance-fitted with the flange shaft 3. The shaft end baffle 507 is connected to the shaft end face of the flange shaft 3 by shaft end baffle fixing bolts 506.

[0037] Adjustment lugs are provided on the two short sides and one long side of the horizontal adjustment base plate 508. Two adjustment bolt assemblies 505 pass through the two adjustment lugs on the short sides and contact the two ends of the spherical bearing support 504 to adjust the deflection magnet 9 in the X direction. One adjustment bolt assembly 505 passes through the adjustment lug on the long side and contacts the outer surface of the shaft end baffle 507 to adjust the deflection magnet 9 in the Z direction.

[0038] In the above embodiments, preferably, the horizontal adjustment component 5 further includes a friction-reducing plate 510, which is fixed to the upper surface of the horizontal adjustment base plate 508 by friction-reducing plate fixing screws 509, so as to reduce friction and improve adjustment efficiency.

[0039] In the above embodiments, preferably, as follows: Figure 5 and Figure 6As shown, the vertical adjustment assembly 6 includes: an outer frame 606, an upper inclined block 601, a lower inclined block 602, a rhomboid bearing seat 604, a lead screw 609, a slider 605, and a guide rail 608; the bottom of the outer frame 606 is fixed to the machined plane of the support assembly 4 by fastening bolts 7; the two rhomboid bearing seats 604 are symmetrically fixed to the two short sides of the outer frame 606 by rhomboid bearing seat fixing bolts 603; the guide rail 608 is fixed to the bottom inside the outer frame 606 by guide rail fixing bolts 607; the slider 605 is installed with a clearance fit. On the guide rail 608; the lower inclined block 602 is fixedly connected to the top of the slider 605 by the lower inclined block connecting screw 610; the lead screw 609 passes through the lower inclined block 602 and two rhomboid bearing seats 604 to form a lead screw nut pair; the upper inclined block 601 is set above the lower inclined block 602 and docks with the lower inclined block 602; several guide rods 611 are provided on the outer edge of the upper inclined block 601, and several countersunk holes are provided on the top of the outer frame 606. The guide rods 611 extend into the countersunk holes to realize the Y-direction linear motion of the upper inclined block when driven by the lead screw nut pair.

[0040] In the above embodiments, preferably, the bottom of the upper inclined block 601 has a wedge-shaped surface, and the top of the lower inclined block 602 has a wedge-shaped surface in the opposite direction to that of the upper inclined block 601.

[0041] In the above embodiments, preferably, guide grooves are respectively provided on the wedge-shaped surface of the upper inclined block 601 and the wedge-shaped surface of the lower inclined block 602, and the guide grooves of the upper inclined block 601 and the lower inclined block 602 are staggered.

[0042] In the above embodiments, preferably, the ends of the lead screw 609 on both sides are milled square or machined with keyways.

[0043] In the above embodiments, preferably, the transition plate 1 and the deflection magnet 9 are fixed by a magnet connecting bolt 2.

[0044] In the above embodiments, preferably, the bottom of the horizontal adjustment component 5 and the top of the vertical adjustment component 6 are fixedly connected by connecting bolts 8.

[0045] Specifically, the working principle of the vertical adjustment component 6 is explained as follows: The screw 609 is rotated by a pipe wrench or handwheel. Since the lower inclined block 602 and the screw 609 form a screw-nut pair, the rotational motion of the screw 609 is converted into linear motion of the lower inclined block 602 along the guide rail 608. Therefore, the lower inclined block 602 moves in the direction of the guide rail 608. Figure 5When the left side of the deflection magnet 9 moves, the corresponding upper inclined block 601 moves downward via its guide rod 611; conversely, when the lower inclined block 602 moves to the right, the corresponding upper inclined block 601 moves upward via its guide rod 611. After the deflection magnet 9 is precisely adjusted, the self-locking principle of the lead screw and nut pair is used to achieve self-locking of the entire assembly in the Y direction. In particular, in an unattended maintenance environment, a servo motor combined with a reducer, sensors, and a PLC control program can be used to drive the lead screw and achieve precise adjustment of the deflection magnet in the Y direction.

[0046] In addition, it should be noted that the flange shaft 3 in this invention is generally stepped and is formed by welding or integrally forming with the shaft through several transition layers. A shoulder is provided at the transition point on the shaft for axial positioning of the inner ring 511 of the spherical bearing. The transition plate 1 is a double-layer transition plate with several threaded holes on the bottom plate and the bottom of the plate is in contact with the surface of the deflection magnet core.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-dimensional adjustable support device for deflecting magnets in a particle accelerator, characterized in that, include: The support component has at least four machining surfaces, which are arranged in pairs. The two sets of machining surfaces are respectively located at both ends of the support component, and the two machining surfaces in each set are symmetrically arranged about the central axis of the support component. A three-dimensional adjustable support module, four of which are respectively disposed on the four processing planes of the support assembly; the three-dimensional adjustable support module is used for precise adjustment of the deflection magnet in the X, Y and Z directions; A deflecting magnet is disposed between the four three-dimensional adjustable support modules, and a transition plate is fixedly disposed at four positions on the deflecting magnet corresponding to the three-dimensional adjustable support module. The flange shaft has its first end fixedly connected to the transition plate and its second end connected to the three-dimensional adjustable support module. The three-dimensional adjustable support module includes a horizontal adjustment component and a vertical adjustment component, with the bottom of the horizontal adjustment component fixedly connected to the top of the vertical adjustment component; The horizontal adjustment component is used for precise adjustment of the deflection magnet in the X and Z directions. The vertical adjustment component is used for precise adjustment of the deflection magnet in the Y direction; The horizontal adjustment assembly includes: a horizontal adjustment base plate, a spherical bearing support seat, a spherical bearing inner ring, a spherical bearing outer ring, a bearing cover, a shaft end baffle, and an adjustment bolt assembly. The horizontal adjustment base plate is fixedly installed on the top of the vertical adjustment assembly; The spherical bearing support is fixedly mounted on the top of the horizontal adjustment base plate. The spherical bearing support has a structure with machined flat surfaces at both ends and an arc-shaped groove in the middle. The bearing cap has a structure with machined flat surfaces at both ends and an arched groove in the middle. The bearing cap is fastened to the spherical bearing support seat, and the machined flat surfaces of the bearing cap and the spherical bearing support seat are connected by bearing cap connecting bolts. The size of the arched groove is adapted to the size of the arc-shaped groove so that a cavity for accommodating the outer ring of the spherical bearing is formed between the bearing cap and the spherical bearing support seat. The outer ring of the spherical bearing is disposed in the cavity and transitions into the arc-shaped groove. The outer ring of the spherical bearing is fixed to the bearing cap by a number of bearing cap set screws to achieve radial positioning of the outer ring of the spherical bearing. The inner ring of the spherical plain bearing is disposed inside the outer ring of the spherical plain bearing and is clearance-fitted with the outer ring of the spherical plain bearing; The inner ring of the spherical plain bearing is fitted onto the flange shaft and has a clearance fit with the flange shaft; The shaft end baffle is connected to the shaft end face of the flange shaft by shaft end baffle fixing bolts; Adjustment lugs are provided on the two short sides and one long side of the horizontal adjustment base plate. Two adjustment bolt assemblies pass through the two adjustment lugs on the short sides and contact the two ends of the joint bearing support seat to adjust the deflection magnet in the X direction. One adjustment bolt assembly passes through the adjustment lug on the long side and contacts the outer side of the shaft end baffle to adjust the deflection magnet in the Z direction. The vertical adjustment assembly includes: an outer frame, an upper inclined block, a lower inclined block, a diamond-shaped bearing seat, a lead screw, a slider, and a guide rail; The bottom of the outer frame is fixed to the machining plane of the support assembly by fastening bolts; The two rhomboid bearing seats are symmetrically fixed to the two short sides of the outer frame by rhomboid bearing seat fixing bolts; The guide rail is fixed to the bottom of the outer frame by guide rail fixing bolts; The slider is mounted on the guide rail with a clearance fit; The lower inclined block is fixedly connected to the top of the slider by a lower inclined block connecting screw; The lead screw passes through the lower inclined block and two diamond-shaped bearing seats to form a lead screw and nut pair; The upper inclined block is positioned above the lower inclined block and is connected to it. Several guide rods are provided along the outer edge of the upper inclined block, and several countersunk holes are provided at the top of the outer frame. The guide rods extend into the countersunk holes to achieve linear Y-axis movement of the upper inclined block when driven by the lead screw and nut pair.

2. The three-dimensional adjustable support device according to claim 1, characterized in that, The horizontal adjustment assembly also includes a friction-reducing plate, which is fixed to the upper surface of the horizontal adjustment base plate by friction-reducing plate fixing screws to reduce friction and improve adjustment efficiency.

3. The three-dimensional adjustable support device according to claim 1, characterized in that, The bottom of the upper inclined block has a wedge-shaped surface, and the top of the lower inclined block has a wedge-shaped surface in the opposite direction to that of the upper inclined block.

4. The three-dimensional adjustable support device according to claim 3, characterized in that, The wedge-shaped surfaces of the upper inclined block and the lower inclined block are respectively provided with guide grooves, and the guide grooves of the upper inclined block and the lower inclined block are staggered.

5. The three-dimensional adjustable support device according to claim 1, characterized in that, The ends of the lead screw on both sides are milled square or machined with keyways.

6. The three-dimensional adjustable support device according to claim 1, characterized in that, The transition plate and the deflection magnet are fixed together by magnetic connecting bolts.

7. The three-dimensional adjustable support device according to claim 1, characterized in that, The bottom of the horizontal adjustment component and the top of the vertical adjustment component are fixedly connected by connecting bolts.

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