A dipolar iron device for a rotating therapeutic terminal

Abstract

This invention relates to the field of particle accelerator technology and provides a polariton device for a rotating therapy terminal. The device includes two magnetic yoke components that, when snapped together, form a vacuum system mounting cavity, a thin-walled vacuum system passing through the vacuum system mounting cavity, and multiple connecting and positioning components spaced apart along the extension direction of the thin-walled vacuum system. A fixing block is provided on the side wall of the vacuum system mounting cavity. Each connecting and positioning component includes a fixing component, a connecting component, and a positioning component. The fixing component is located on the fixing block, and the positioning component includes a positioning element with a positioning surface. The connecting component connects the fixing component and the positioning element to adjust the position of the positioning element so that the positioning surface abuts against the outer wall of the thin-walled vacuum system. This achieves multi-point positioning and support of the thin-walled vacuum system along its length, enhances the structural rigidity of the thin-walled vacuum system in the vertical installation state and during the vacuuming process, effectively suppresses elastic or plastic deformation, ensures the positioning accuracy of the thin-walled vacuum system, prevents beam loss, and improves safety.

Description

Technical Field

[0001] This invention relates to the field of particle accelerator technology, and more particularly to a dipolar iron device for a rotating therapeutic terminal. Background Technology

[0002] Medical particle therapy devices, with their excellent dose distribution characteristics and ability to protect normal tissues, have become an important development direction for radiotherapy equipment. To improve equipment utilization efficiency and reduce construction and maintenance costs, there is a growing trend towards using a single rotating treatment terminal to provide particle beams to multiple treatment rooms in a compact architecture.

[0003] In the beam transmission system of a rotating therapeutic terminal, the dipole device, as the core component for beam deflection, needs to complete rapid magnetic field switching within milliseconds, with a maximum magnetic field rise rate of 12 T / s, to meet the requirements of advanced treatment modes for rapid beam scanning. This rapidly changing magnetic field induces eddy current effects in traditional thick-walled vacuum pipes, leading to localized overheating and vacuum deterioration, and generating additional magnetic fields that interfere with the main magnetic field distribution, affecting the control accuracy of the beam trajectory. Therefore, suppressing eddy current effects is crucial, necessitating the use of a thin-walled vacuum chamber structure.

[0004] However, structural stability issues still exist in the aforementioned design using thin-walled vacuum chambers. Firstly, in a vertically installed state, the 0.3mm thick thin-walled vacuum chamber's resistance to instability under atmospheric pressure is far lower than in a horizontally installed state. Its own weight and vacuum negative pressure easily lead to elastic instability or even plastic yielding of the tube wall. Deformation of the thin-walled vacuum chamber can cause beam channel shift, resulting in beam bombardment and even puncture of the chamber. Secondly, due to the compact layout within the rotating frame, corrugated pipes are typically integrated at both ends of the thin-walled vacuum chamber to compensate for installation and manufacturing errors. The introduction of these corrugated pipes further weakens the supporting stiffness at the ends of the thin-walled vacuum chamber. Since the corrugated pipes themselves are thin-walled flexible structures, the entire thin-walled vacuum chamber becomes a pressure-bearing thin-shell structure with free ends during evacuation, making its deformation behavior difficult to predict and control, thus affecting the system's mechanical reliability and operational accuracy. Summary of the Invention

[0005] This invention provides a polar iron device for a rotating therapeutic terminal to solve the defects of thin-walled vacuum chambers that are prone to deformation and affect sealing and beam accuracy under vacuum and rotation conditions due to insufficient structural rigidity when vertically installed, thereby achieving stable support and limiting of the thin-walled vacuum chamber.

[0006] This invention provides a dipolar iron device for a rotary therapeutic terminal, comprising:

[0007] The magnetic yoke assembly includes two magnetic yoke components. When the two magnetic yoke components are fastened together, they form a vacuum system mounting cavity. The sidewall of the vacuum system mounting cavity is provided with a plurality of fixing blocks that are spaced apart along the extension direction of the vacuum system mounting cavity.

[0008] A thin-walled vacuum system is installed in the vacuum system mounting cavity;

[0009] Multiple connecting and positioning components are arranged at intervals along the extension direction of the thin-walled vacuum system and distributed on opposite sides of the thin-walled vacuum system; each connecting and positioning component includes a fixing component, a connecting component, and a positioning component. The fixing component is disposed on a corresponding fixing block, and the positioning component includes a positioning element having a positioning surface adapted to the arc shape of the outer wall of the thin-walled vacuum system. The connecting component connects the fixing component and the positioning element, and the connecting component is used to adjust the position of the positioning element so that the positioning element abuts against and positions the outer wall of the thin-walled vacuum system through the positioning surface.

[0010] According to the present invention, a diode device for a rotary therapeutic terminal is provided, wherein the positioning component further includes a flexible pad disposed on the positioning surface, the cross-sectional shape of the flexible pad being adapted to the surface shape of the positioning surface.

[0011] According to the present invention, a diode device for a rotating therapeutic terminal is provided, wherein the flexible pad is an elastic silicone pad.

[0012] According to the present invention, a diode iron device for a rotating therapeutic terminal is provided, wherein the thickness of the flexible pad is 12mm to 17mm.

[0013] According to the present invention, a polar iron device for a rotary therapeutic terminal is provided, each of the fixing components includes two fixing members, the two fixing members being clamped on both sides of the corresponding fixing block along the extension direction of the thin-walled vacuum system, and the fixing members being connected to the connecting component.

[0014] According to the present invention, a polar iron device for a rotary therapeutic terminal is provided, wherein one end of the fixing member near the connecting member extends out of the fixing block, and the two protruding ends of the fixing members are connected and fixed by a locking member.

[0015] According to the present invention, a polar iron device for a rotary therapeutic terminal is provided, wherein the fixing member is provided with a fixing part that is detachably connected to the fixing block.

[0016] According to the present invention, a polar iron device for a rotary therapeutic terminal includes a connecting component comprising a screw and a nut. One end of the screw is connected to the fixing component, and the other end of the screw is connected to the positioning component. The nut is sleeved on the screw, and the positioning component is driven to move by adjusting the position of the nut on the screw.

[0017] According to the present invention, a polar iron device for a rotating therapeutic terminal has a connecting positioning component made of a non-magnetic material.

[0018] According to the present invention, a polar iron device for a rotary therapeutic terminal is provided, at least one of the connecting positioning components is provided with a displacement sensor, the detection end of the displacement sensor is in contact with the positioning component or the outer wall of the thin-walled vacuum system, and is used to monitor the position change of the thin-walled vacuum system within the vacuum system mounting cavity.

[0019] The polar iron device of the rotating therapy terminal provided by this invention arranges multiple connecting and positioning components at intervals along the extension direction of the thin-walled vacuum system, with the connecting and positioning components distributed on opposite sides of the thin-walled vacuum system. The fixing part of the connecting and positioning component is connected to the fixing block, and the positioning component is connected to the fixing part through the connecting part. The position of the positioning component is adjusted by the connecting part so that the positioning surface of the positioning component abuts against and positions the outer wall of the thin-walled vacuum system. This can realize multi-point positioning and support of the thin-walled vacuum system along the length direction, enhance the overall structural rigidity of the thin-walled vacuum system in the vertical installation state and during the vacuuming process, effectively suppress its elastic or plastic deformation, thereby ensuring the positioning accuracy of the thin-walled vacuum system, preventing beam loss, and improving the overall system safety. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is one of the structural schematic diagrams of the dipolar iron device of the rotary therapy terminal provided by the present invention.

[0022] Figure 2 This is the second schematic diagram of the structure of the dipolar iron device of the rotary therapy terminal provided by the present invention.

[0023] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at point A.

[0024] Figure 4 This is a schematic diagram of the connection and positioning component provided by the present invention.

[0025] Figure label:

[0026] 100. Magnetic yoke component; 110. Magnetic core; 120. Toroidal coil; 130. Fixing block;

[0027] 200. Thin-walled vacuum system;

[0028] 300. Connecting and positioning assembly; 310. Fixing component; 311. Fixing element; 3111. Fixing part; 312. Locking element;

[0029] 320. Connecting component; 321. Screw; 322. Nut;

[0030] 330. Positioning component; 331. Positioning element; 332. Flexible pad. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0032] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0034] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] The following is combined Figures 1-4 The present invention describes a dipolar iron device for a rotary therapeutic terminal.

[0037] An embodiment of the first aspect of the present invention provides a dipolar iron device for a rotary therapeutic terminal, such as... Figures 1 to 4 As shown, the dipolar iron device of the rotary therapeutic terminal includes a magnetic yoke assembly, a thin-walled vacuum system 200 passing through the magnetic yoke assembly, and a plurality of connecting and positioning components 300 disposed between the magnetic yoke assembly and the thin-walled vacuum system 200; the connecting and positioning components 300 are used to position the thin-walled vacuum system 200.

[0038] The magnetic yoke assembly includes two magnetic yoke components 100, which, when engaged, form a vacuum system mounting cavity. The sidewalls of the vacuum system mounting cavity are provided with multiple fixing blocks 130 spaced apart along the extending direction of the vacuum system mounting cavity. A thin-walled vacuum system 200 extends through the vacuum system mounting cavity along its extending direction. The wall thickness of the thin-walled vacuum system 200 can be approximately 0.3 mm. Multiple connecting and positioning components 300 are arranged at intervals along the extension direction of the thin-walled vacuum system 200 and distributed on opposite sides of the thin-walled vacuum system 200. Each connecting and positioning component 300 includes a fixing component 310, a connecting component 320, and a positioning component 330. The fixing component 310 is disposed on a corresponding fixing block 130. The positioning component 330 includes a positioning element 331, which has a positioning surface adapted to the arc shape of the outer wall of the thin-walled vacuum system 200. The connecting component 320 is connected between the fixing component 310 and the positioning element 331. The connecting component 320 is used to adjust the position of the positioning element 331 so that the positioning element 331 abuts against and positions the outer wall of the thin-walled vacuum system 200 through the positioning surface.

[0039] It is understood that the magnetic yoke assembly is composed of two magnetic yoke components 100 that are mated and fastened together. Each magnetic yoke component 100 has an inner surface machined with a mounting groove extending in an arc direction. When the two magnetic yoke components 100 are mated and fastened together, the two mounting grooves together form an arc-shaped vacuum system mounting cavity for accommodating and arranging the arc-shaped thin-walled vacuum system 200. The inner wall of the vacuum system mounting cavity is provided with multiple fixing blocks 130 at intervals along its arc-shaped extension direction. The thin-walled vacuum system 200 passes through the arc-shaped path of the vacuum system mounting cavity. Multiple connecting and positioning components 300 are arranged at intervals along the arc-shaped extension direction of the thin-walled vacuum system 200. Furthermore, multiple connecting and positioning components 300 are distributed on both sides of the thin-walled vacuum system 200. The connecting and positioning components 300 are disposed between the fixed block 130 and the outer wall of the thin-walled vacuum system 200. Each connecting and positioning component 300 includes a fixing component 310, a connecting component 320 and a positioning component 330. The fixing component 310 is installed on the corresponding fixing block 130. The positioning component 330 includes a positioning element 331 with a positioning surface that matches the curvature of the outer wall of the thin-walled vacuum system 200. The connecting component 320 is located between the fixing component 310 and the positioning element 331. The positioning element 331 is moved by the connecting component 320, so that the positioning surface tightly abuts against and stably constrains the outer wall of the thin-walled vacuum system 200 along the arc path.

[0040] It should be noted that each magnetic yoke component 100 includes a magnetic core 110 and a ring coil 120. The magnetic core 110 has an arc-shaped mounting groove, and the ring coil 120 is arranged within the mounting groove and extends along the arc direction. Multiple fixing blocks 130 distributed along the arc direction are provided within the mounting groove. The fixing blocks 130 are used to fix the ring coil 120 and also serve as the mounting base for the connection and positioning assembly 300. In this embodiment, the connection and positioning assembly 300 is mounted on the existing fixing blocks 130, without requiring additional modifications to the magnetic yoke component 100 or the addition of new mounting points. Thus, stable positioning and support of the thin-walled vacuum system 200 are achieved while utilizing the existing structure.

[0041] It should be noted that the annular coil 120 is racetrack-shaped or elliptical, and the fixing blocks 130 are arranged at intervals along the length direction of the racetrack-shaped coil (i.e., its long side), thus forming multiple spaced fixing blocks 130 on both sides of the corresponding arc-shaped extension path of the thin-walled vacuum system 200. During installation, the thin-walled vacuum system 200 can be placed in the mounting groove of one of the magnetic cores 110, and the connecting positioning component 300 can be installed between the corresponding fixing block 130 and the outer wall of the thin-walled vacuum system 200 to achieve initial positioning and support of the thin-walled vacuum system 200. Subsequently, the other magnetic yoke component 100 is snapped on to form a complete polariton device for rotating treatment terminals. During this process, multiple connecting positioning components 300 work together to ensure that the thin-walled vacuum system 200 remains stable in the final vacuum system mounting cavity; and during the vacuuming process, due to the limiting effect of the connecting positioning components 300, the thin-walled vacuum system 200 is prevented from shifting or deforming, thereby achieving stable support and limiting of the thin-walled vacuum system 200.

[0042] It should be noted that by adjusting the position of the positioning component 331 through the connecting component 320, the positioning surface abuts against and positions the outer wall of the thin-walled vacuum system 200. Under the premise of ensuring stable support, it can compensate for installation and processing errors, adapt to the flexibility changes brought about by the integrated bellows at both ends of the thin-walled vacuum system 200, and improve the mechanical stability and long-term operating accuracy of the mechanism under continuous rotation conditions.

[0043] The polar iron device of the rotating therapy terminal provided in this embodiment of the invention arranges multiple connecting and positioning components 300 at intervals along the extension direction of the thin-walled vacuum system 200, and distributes the connecting and positioning components 300 on opposite sides of the thin-walled vacuum system 200. The fixing component 310 of the connecting and positioning component 300 is connected to the fixing block 130, and the positioning component 330 is connected to the fixing component 310 through the connecting component 320. The position of the positioning component 330 is adjusted by the connecting component 320 so that the positioning surface of the positioning component 330 abuts against and positions the outer wall of the thin-walled vacuum system 200. This can realize multi-point positioning and support of the thin-walled vacuum system 200 along the length direction, enhance the overall structural rigidity of the thin-walled vacuum system 200 in the vertical installation state and during the vacuuming process, effectively suppress its elastic or plastic deformation, thereby ensuring the positioning accuracy of the thin-walled vacuum system 200, preventing beam loss, and improving the overall system safety.

[0044] It should be noted that the thin-walled vacuum system 200 includes a thin-walled vacuum tube and corrugated pipes connected to both ends of the thin-walled vacuum tube. The thin-walled vacuum tube forms a vacuum chamber and passes through the vacuum system mounting cavity formed by the engagement of two magnetic yoke components 100. Both ends of the thin-walled vacuum tube extend to the outside of the vacuum system mounting cavity and are connected to the corresponding corrugated pipes. If a complex mechanism is used to clamp the thin-walled vacuum tube, it will not only occupy the magnetic air gap space, causing the cost of the magnet to increase non-linearly and rapidly due to the increase in the air gap, but also interfere with the magnetic field due to the unavoidable use of a large amount of metal material. In contrast, the connection and positioning component of this embodiment has a simple structure, does not occupy the magnetic air gap, has no effect on the magnetic field, does not require modification of the magnet, and is suitable for the installation and positioning of vertically installed thin-walled vacuum systems.

[0045] In one embodiment of the present invention, such as Figure 4 As shown, the positioning component 330 also includes a flexible pad 332, which is disposed on the positioning surface of the positioning component 331. The cross-sectional shape of the flexible pad 332 is adapted to the surface shape of the positioning surface, thereby providing flexible buffering and protection when the positioning component 331 contacts the outer wall of the thin-walled vacuum system 200.

[0046] For example, both the flexible pad 332 and the positioning surface are arc surfaces adapted to the curvature of the outer wall of the thin-walled vacuum system 200, thereby providing uniform and flexible cushioning and protection when the positioning element 331 contacts the outer wall of the thin-walled vacuum system 200.

[0047] In this embodiment, the flexible pad 332 is an elastic silicone pad, and its thickness can be set to 15mm. In other embodiments, the flexible pad 332 can also be made of other flexible cushioning materials, such as rubber or polyurethane pads; the thickness of the flexible pad 332 can be reasonably designed according to the actual structural requirements and cushioning needs, for example, it can be designed to be 12mm to 17mm.

[0048] In one embodiment of the present invention, the positioning surface of the positioning member 331 is treated to increase friction to ensure that the flexible pad 332 can be stably positioned on the positioning member 331, thereby effectively preventing the flexible pad 332 from slipping relative to the positioning surface during installation or adjustment.

[0049] In one embodiment of the present invention, such as Figure 3 and Figure 4 As shown, each fixing component 310 includes two fixing members 311, which are clamped on both sides of the corresponding fixing block 130 along the extension direction of the thin-walled vacuum system 200, and the fixing members 311 are connected to the connecting component 320.

[0050] Understandably, the fixing component 310 includes two fixing members 311, which are designed to be symmetrically arranged along the arcuate extension direction of the thin-walled vacuum system 200, and to clamp and fix the corresponding fixing blocks 130 on the sidewalls of the vacuum system mounting cavity from both sides. Each fixing member 311 is reliably connected to the connecting component 320, thereby ensuring that the entire connecting and positioning assembly 300 can be stably installed on the fixing blocks 130 through the double-sided clamping installation method, and providing an installation basis for subsequent adjustment and positioning.

[0051] Optionally, such as Figure 3 and Figure 4 As shown, the end of the fastener 311 near the connecting component 320 extends out of the fastening block 130, and the extended ends of the two fasteners 311 are connected and fixed by the locking component 312.

[0052] Understandably, the end of each fastener 311 facing the connecting member 320 is designed to extend beyond the clamping block 130. The protruding ends of the two fasteners 311 extending out of the fixing block 130 have connecting blocks. The connecting blocks of the two fasteners 311 are connected and fixed to each other by locking member 312, thereby further enhancing the integrity and stability of the fixing member 310.

[0053] Among them, the locking member 312 can be a locking rod, with both ends of the locking rod passing through the protruding ends of the two fixing members 311 respectively, and being fastened and locked by tightening the nuts at their ends.

[0054] Optionally, such as Figure 3 and Figure 4As shown, each fastener 311 is also provided with a fixing part 3111, which can be detachably connected to the corresponding fixing block 130, thereby improving the convenience of installing and disassembling the fastener 310. Specifically, the fixing block 130 is provided with a threaded hole, and the fixing part 3111 is designed as a matching bolt or screw structure. During installation, a reliable fastening connection between the fastener 311 and the fixing block 130 can be achieved by screwing the threaded end of the fixing part 3111 into the corresponding threaded hole on the fixing block 130; during disassembly, it can be separated by unscrewing it in the reverse direction.

[0055] In one embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the connecting component 320 includes a screw 321 and a nut 322. One end of the screw 321 is connected to the fixing component 310, and the other end of the screw 321 is connected to the positioning component 331. The nut 322 is sleeved on the screw 321. The positioning component 331 is driven to move by adjusting the position of the nut 322 on the screw 321.

[0056] Specifically, one end of the screw 321 is fixedly connected to the fixing component 310, and the other end of the screw 321 passes through the positioning component 331, with a clearance fit between the screw 321 and the positioning component 331. The nut 322 is sleeved on the screw 321, located between the positioning component 331 and the fixing component 310 and close to the positioning component 331. The nut 322 has an adjustable stroke for fine-tuning the position of the positioning component 331. By rotating the nut 322 forward, the nut 322 moves along the screw 321 toward the positioning component 331, pushing the positioning component 331 away from the fixing component 310, so that the positioning surface abuts against and positions the outer wall of the thin-walled vacuum system 200. When the position of the thin-walled vacuum system 200 needs to be adjusted, the distance between the positioning member 331 on one side of the thin-walled vacuum system 200 and the fixing member 310 can be increased, while the distance between the positioning member 331 on the other side and the fixing member 310 can be decreased, so as to achieve fine adjustment of the position of the thin-walled vacuum system 200 in the vacuum system mounting cavity. In this way, by adjusting the position of the nut 322 in the axial direction of the screw 321, the position of the positioning member 331 can be adjusted, so that the flexible pad 332 of the positioning surface tightly abuts against and stably constrains the outer wall of the thin-walled vacuum system 200 along the arc path, thereby achieving the positioning of the thin-walled vacuum system 200. It should be noted that when the thin-walled vacuum system 200 is not assembled, the positioning member 331 is only fitted onto the screw 321 with a clearance fit, and there is a possibility of it falling off from the end of the screw 321; however, this falling off only occurs during the assembly or maintenance stage when the thin-walled vacuum system 200 is not installed. At this time, the positioning member 331 has not yet participated in the positioning work, and its falling off will not affect the positioning of the thin-walled vacuum system 200. After the thin-walled vacuum system 200 is installed in the vacuum system mounting cavity, the positioning member 331 abuts against the outer wall of the thin-walled vacuum system 200 under the push of the nut 322. The thin-walled vacuum system 200 forms a physical block on the positioning member 331, restricting the positioning member 331 from continuing to move away from the fixed component 310, thereby preventing the positioning member 331 from falling off the screw 321.

[0057] In one embodiment of the present invention, at least one connecting positioning component 300 is provided with a displacement sensor (not shown in the figure), the detection end of the displacement sensor is in contact with the positioning component 331 or the outer wall of the thin-walled vacuum system 200, for monitoring the position change of the thin-walled vacuum system 200 in the vacuum system mounting cavity.

[0058] Understandably, the connection positioning component 300 integrates a displacement sensor. The detection end of the displacement sensor is used to monitor the positional shift or deformation of the thin-walled vacuum system 200 within the vacuum system mounting cavity in real time, providing data support for the active adjustment or status diagnosis of the system, thereby ensuring the long-term positional stability of the beam channel and the treatment accuracy.

[0059] In one embodiment of the present invention, the connecting and positioning component 300 is made of a non-magnetic material. Specifically, the fixing component 310, the connecting component 320, and the positioning component 330 are all made of non-magnetic materials to avoid interfering with the magnetic field generated by the magnetic yoke.

[0060] In this embodiment, the fixing component 310 and the positioning component 330 are made of non-metallic G10 material (glass fiber reinforced epoxy resin laminate); the connecting component 320 is made of non-metallic PEEK material (polyether ether ketone) to ensure the electromagnetic compatibility of the connecting positioning component 300 in a strong magnetic field environment.

[0061] A second aspect of the present invention provides a rotary therapy terminal, which includes the dipolar iron device of the rotary therapy terminal provided in any of the above embodiments.

[0062] Optionally, the rotating treatment terminal is used for charged particle beam radiotherapy and specifically includes a rotating gantry, a treatment head, and a beam delivery system.

[0063] The rotating gantry is capable of rotating around a horizontal treatment axis; the treatment head is mounted on the rotating gantry and is used to extract the charged particle beam and form a treatment beam spot to irradiate the patient's target area; the beam transmission system is disposed inside the rotating gantry and is used to transmit the charged particle beam from the entrance of the rotating gantry to the treatment head; the beam transmission system includes the diode iron device of the rotating treatment terminal provided in any of the above embodiments, which is used to deflect the transmitted charged particle beam.

[0064] In one embodiment of the present invention, the beam transmission system includes two diode devices of two rotating treatment terminals arranged sequentially along the beam direction, referred to as the diode device of the first rotating treatment terminal and the diode device of the second rotating treatment terminal, respectively. The diode device of the first rotating treatment terminal deflects the beam and guides it into the rotating plane of the rotating gantry, and the diode device of the second rotating treatment terminal further deflects the beam to the direction of docking with the treatment head.

[0065] 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 diode iron device for a rotating therapeutic terminal, characterized in that, include: The magnetic yoke assembly includes two magnetic yoke components. When the two magnetic yoke components are fastened together, they form a vacuum system mounting cavity. The sidewall of the vacuum system mounting cavity is provided with a plurality of fixing blocks that are spaced apart along the extension direction of the vacuum system mounting cavity. A thin-walled vacuum system is installed in the vacuum system mounting cavity; Multiple connecting and positioning components are arranged at intervals along the extension direction of the thin-walled vacuum system and distributed on opposite sides of the thin-walled vacuum system; each connecting and positioning component includes a fixing component, a connecting component, and a positioning component. The fixing component is disposed on a corresponding fixing block, and the positioning component includes a positioning element having a positioning surface adapted to the arc shape of the outer wall of the thin-walled vacuum system. The connecting component connects the fixing component and the positioning element, and the connecting component is used to adjust the position of the positioning element so that the positioning element abuts against and positions the outer wall of the thin-walled vacuum system through the positioning surface.

2. The polar iron device of the rotary therapeutic terminal according to claim 1, characterized in that, The positioning component also includes a flexible pad disposed on the positioning surface, the cross-sectional shape of which is adapted to the surface shape of the positioning surface.

3. The polar iron device of the rotary therapeutic terminal according to claim 2, characterized in that, The flexible pad is an elastic silicone pad.

4. The polar iron device of the rotary therapeutic terminal according to claim 2, characterized in that, The thickness of the flexible pad is 12mm to 17mm.

5. The polar iron device of the rotary therapeutic terminal according to claim 1, characterized in that, Each of the fixing components includes two fixing members, which are clamped on both sides of the corresponding fixing block along the extension direction of the thin-walled vacuum system, and the fixing members are connected to the connecting component.

6. The polar iron device of the rotary therapeutic terminal according to claim 5, characterized in that, The end of the fixing member near the connecting component extends out of the fixing block, and the two protruding ends of the fixing members are connected and fixed by a locking member.

7. The polar iron device of the rotary therapeutic terminal according to claim 5, characterized in that, The fastener is provided with a fixing part that can be detachably connected to the fixing block.

8. The polar iron device of the rotary therapeutic terminal according to claim 1, characterized in that, The connecting component includes a screw and a nut. One end of the screw is connected to the fixing component, and the other end of the screw is connected to the positioning component. The nut is sleeved on the screw, and the positioning component is driven to move by adjusting the position of the nut on the screw.

9. The polar iron device of the rotary therapeutic terminal according to claim 1, characterized in that, The connection positioning component is made of non-magnetic material.

10. The polar iron device of the rotary therapeutic terminal according to any one of claims 1 to 9, characterized in that, At least one of the connection positioning components is provided with a displacement sensor, the detection end of which contacts the positioning element or the outer wall of the thin-walled vacuum system, for monitoring the positional changes of the thin-walled vacuum system within the vacuum system mounting cavity.

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