Cyclotron, superconducting coil adjusting unit, superconducting coil adjusting device and superconducting coil commissioning method

Abstract

The present application discloses a cyclotron, a radiotherapy device, a superconducting coil adjusting unit, a superconducting coil adjusting device and a superconducting coil commissioning method. The superconducting coil adjusting unit comprises a rotating shaft, a driving assembly, a transmission assembly, and a detection element; the rotating shaft is used for rotating under the driving of the driving unit; the driving assembly comprises an actuator and a tension assembly, wherein the actuator is used for driving by means of rotation the tension assembly to move linearly, and one end of the tension assembly is connected to a superconducting coil and drives the superconducting coil to move; the transmission assembly is separately connected to the rotating shaft and the actuator, and transmits the power generated by the rotating shaft to the actuator; and the detection element is connected to the actuator and detects the rotation angle of the actuator, so as to monitor the displacement of the tension assembly and the superconducting coil. The cyclotron, the radiotherapy device, the superconducting coil adjustment unit, the superconducting coil adjustment apparatus, and the superconducting coil commissioning method of the present application are used for adjusting the position of the superconducting coil, so that the superconducting coil can be adjusted to a required position.

Description

Cyclotron, superconducting coil adjusting unit, adjusting device and debugging method

[0001] This application claims priority to Chinese Patent Application No. 202410738102.7, filed on June 7, 2024, which is incorporated by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of proton therapy equipment, for example, to a cyclotron, a superconducting coil adjusting unit, an adjusting device and a debugging method. BACKGROUND

[0003] In a small integrated proton therapy device, a cyclotron is generally used to output a proton beam to irradiate a lesion position of a patient for treatment. In order to enable the proton beam to be emitted at different angles, the cyclotron in the related art needs to be reciprocally rotated within a certain angle range under the driving of a robot arm.

[0004] Since the superconducting coil in the cyclotron is generally in a suspended state to reduce the influence of heat transfer on the working state of the superconducting coil, the superconducting coil may be offset during the rotation of the cyclotron, thereby causing the center axis of the magnetic field generated by the superconducting coil to be off-center from the physical center axis of the cyclotron. At this time, the proton beam may also be offset when being accelerated in the cyclotron, thereby causing the proton beam to be unable to be emitted from the beam outlet of the cyclotron, or only part of the proton beam to be emitted from the beam outlet of the cyclotron, resulting in that the beam current of the proton beam extracted from the cyclotron cannot meet the requirements. SUMMARY

[0005] The purpose of the present application is to provide a cyclotron, a radiotherapy device, a superconducting coil adjusting unit, an adjusting device and a debugging method, which are used to adjust the position of the superconducting coil, so that the superconducting coil can be adjusted to the required position.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] A superconducting coil adjusting unit comprises:

[0008] A rotating shaft is used to connect with an external driving unit and can be rotated under the driving of the driving unit;

[0009] A driving assembly comprises an actuator and a tension assembly connected with each other, the actuator is used to drive the tension assembly to move linearly through rotation, and one end of the tension assembly is used to connect with the superconducting coil and can drive the superconducting coil to move;

[0010] A transmission assembly connected with the rotating shaft and the actuator respectively, and configured to transmit power generated by the rotating shaft to the actuator, so as to drive at least a part of the actuator to rotate;

[0011] A detection element connected with the actuator and configured to detect the rotating angle of the actuator, so as to monitor the displacement of the tension assembly and the superconducting coil.

[0012] In some optional embodiments, the transmission assembly comprises a driving gear sleeved on the rotating shaft and a driven gear fixedly connected with the actuator, the driving gear is engaged with the driven gear, so as to transmit power of the rotating shaft to the actuator;

[0013] And / or, the actuator is a differential screw, and the inner wheel of the differential screw is lower than the outer wheel of the differential screw along the height direction of the superconducting coil adjusting unit.

[0014] In some optional embodiments, the tension assembly is connected with a pressure detection element configured to detect the force applied by the tension assembly to the superconducting coil;

[0015] And / or, the detection element is a potentiometer.

[0016] In some optional embodiments, a limiting element and a housing are further included, the limiting element is connected with the tension assembly, the housing is internally formed with a limiting space for accommodating the limiting element, and a wall forming the limiting space is at least partially laminated with the limiting element along the moving direction of the tension assembly, so as to limit the moving range of the limiting element;

[0017] And / or, the housing is internally provided with a protruding column capable of extending into the limiting space, the protruding column is arranged at one end of the tension assembly facing the superconducting coil, so as to limit the moving range of the tension assembly.

[0018] In some optional embodiments, the tension assembly is provided at one end connected with the superconducting coil with a connecting portion and a fixing element, the connecting portion comprises a connecting cavity and a fixing hole in communication with the connecting cavity, the connecting cavity is configured to accommodate an adjusting assembly connected with the superconducting coil, and the fixing element penetrates into the connecting cavity through the fixing hole and fixes the adjusting assembly.

[0019] A superconducting coil adjusting device, comprising:

[0020] The superconducting coil adjusting unit of any one of the above;

[0021] A driving unit connected with the rotating shaft of the superconducting coil adjusting unit and configured to drive the rotating shaft to rotate;

[0022] An adjusting assembly, one end of which is used to connect with the superconducting coil, and the other end of which is used to connect with a tension assembly of the superconducting coil adjusting unit, the tension assembly driving the superconducting coil to move through the adjusting assembly.

[0023] In some optional embodiments, a control unit is further included, which is connected with the detection element and the driving unit respectively to receive the detection information of the detection element and control the driving unit to operate.

[0024] In some optional embodiments, the tension assembly is provided with a connecting part and a fixing part at one end used to connect with the superconducting coil; the adjusting assembly includes a tension rod, and a first matching part and a second matching part distributed at opposite ends of the tension rod, the first matching part being used to connect with the superconducting coil, and the second matching part being used to connect with the connecting part of the tension assembly and being fixed opposite to the tension assembly through the fixing part.

[0025] A cyclotron, comprising:

[0026] At least one superconducting coil adjusting device of any of the above;

[0027] A superconducting coil;

[0028] A mounting bracket, which is provided with a mounting space used to accommodate the superconducting coil, and includes at least one matching part used to match with the superconducting coil device, the superconducting coil adjusting device adjusting the position of the mounting bracket and the superconducting coil mounted in the mounting bracket through the matching part.

[0029] In some optional embodiments, at least one pair of the superconducting coil adjusting devices is provided, one pair of the superconducting coil adjusting devices being distributed at opposite ends of the superconducting coil, and one pair of the superconducting coil adjusting devices being used to adjust the position of the superconducting coil along an axis.

[0030] In some optional embodiments, a plurality of magnetic field detection parts are further included, which are distributed at intervals to measure the magnetic field strength at a plurality of positions in the cyclotron;

[0031] Or, a magnetic field detection device is further included, which includes a detection end and a driving part, the detection end being used to detect the magnetic field strength at the position where the detection end is located, and the driving part being used to drive the detection end to move to measure the magnetic field strength at a plurality of positions in the cyclotron.

[0032] A superconducting coil debugging method applied to the cyclotron of any of the above, the superconducting coil debugging method comprising:

[0033] The offset of the superconducting coil is obtained, and the adjustment amount required by each superconducting coil adjustment device is obtained through the offset of the superconducting coil.

[0034] Each superconducting coil adjustment device controls the driving unit to operate according to the required adjustment amount, so as to drive the superconducting coil to be adjusted to a specified position.

[0035] In some optional embodiments, further comprising:

[0036] The rotation angle of the actuator under the driving of the driving unit is monitored through the detection element, so as to obtain the actual adjustment amount of the superconducting coil adjustment device, and when the actual adjustment amount of the superconducting coil adjustment device is the same as the required adjustment amount of the superconducting coil adjustment device, the driving unit stops operating.

[0037] A radiotherapy device comprising the cyclotron of any one of the above.

[0038] The cyclotron, the superconducting coil adjustment unit, the adjustment device and the debugging method provided by the present application have at least the following advantages:

[0039] By connecting the tension assembly of the driving assembly with the superconducting coil to drive the superconducting coil to move, the adjustment of the position of the superconducting coil can be realized, so that when the superconducting coil is offset, the position of the superconducting coil can be adjusted by the superconducting coil adjustment unit to make the superconducting coil be adjusted to the required position. Moreover, by detecting the displacement of the tension assembly and the superconducting coil through the detection element, the adjustment accuracy of the superconducting coil adjustment unit to the superconducting coil can be ensured, and thus the beam extracted from the cyclotron can meet the requirements, which provides reliable guarantee for realizing precise radiotherapy effect. BRIEF DESCRIPTION OF DRAWINGS

[0040] FIG. 1 is a structural schematic view of a superconducting coil adjustment unit according to an embodiment of the present application;

[0041] FIG. 2 is a sectional view of the superconducting coil adjustment unit according to an embodiment of the present application;

[0042] FIG. 3 is a partial structural schematic view of the superconducting coil adjustment unit according to an embodiment of the present application;

[0043] FIG. 4 is a structural schematic view of a superconducting coil adjustment device according to an embodiment of the present application;

[0044] FIG. 5 is a partial structural schematic view of the superconducting coil adjustment device according to an embodiment of the present application.

[0045] In the figure: 100, superconducting coil adjusting unit; 1, rotating shaft; 11, notch; 2, driving assembly; 21, actuator; 211, adjusting hole; 22, tension assembly; 221, connecting part; 2211, connecting cavity; 2212, fixing hole; 222, fixing piece; 223, tension cup; 224, pull rod; 2241, first section of rod body; 2242, second section of rod body; 225, hexagonal sealing plate; 3, transmission assembly; 31, driving gear; 32, driven gear; 4, detection element; 5, pressure detection piece; 6, limiting piece; 7, shell; 71, limiting space; 72, protruding column; 200, driving unit; 201, motor; 202, transmission rod; 300, adjusting assembly; 301, tension rod; 302, first matching piece; 303, second matching piece. DETAILED DESCRIPTION

[0046] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, the example embodiments can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the several views and the description of the figures.

[0047] The words expressing position and direction described in the present application are described with the drawings as an example, but changes can also be made as needed, and the changes made are included in the scope of protection of the present application.

[0048] As shown in FIG. 1 and FIG. 2, the present application provides a superconducting coil adjusting unit 100, which comprises a shell 7, a rotating shaft 1 capable of being connected with an external driving unit 200, a driving assembly 2 connected with the rotating shaft 1, a transmission assembly 3 capable of power transmission and connected with the driving assembly 2 and the rotating shaft 1 respectively, and a detection element 4 for detecting the movement amount of the driving assembly 2.

[0049] The shell 7 can be used to accommodate at least part of the above-mentioned rotating shaft 1, driving assembly 2, transmission assembly 3 and detection element 4. Specifically, the end of the rotating shaft 1 for connecting with the transmission assembly 3 is accommodated in the shell 7, and the end of the rotating shaft 1 for connecting with the driving unit 200 protrudes out of the shell 7; the main part of the driving assembly 2 is accommodated in the shell 7, and the end of the driving assembly 2 for connecting with the superconducting coil protrudes out of the shell 7; the detection element 4 and the transmission assembly 3 can be completely accommodated in the shell 7, and the overall structure of the superconducting coil adjusting unit 100 is more compact.

[0050] The rotating shaft 1 can be driven to rotate by an external driving unit 200, and the rotating shaft 1 can transmit power to the driving assembly 2 through a transmission assembly 3. One end of the rotating shaft 1 for connecting the external driving unit 200 is provided with a notch 11 recessed from the outer wall of the rotating shaft 1 in the radial direction of the rotating shaft 1, and the notch 11 can be attached to the driving unit 200 to prevent relative rotation between the rotating shaft 1 and the driving unit 200.

[0051] Referring to FIGS. 2 and 3, the transmission assembly 3 can include a driving gear 31 and a driven gear 32 engaged with each other. The driving gear 31 can be sleeved on the rotating shaft 1, and the driving gear 31 can rotate synchronously with the rotating shaft 1. Specifically, the driving gear 31 is relatively fixed with the rotating shaft 1 by interference fit, screw fixation, or the like, so that the driving gear 31 and the rotating shaft 1 can rotate synchronously. The driven gear 32 can be driven to rotate by the driving gear 31, and the driven gear 32 is fixedly connected with the driving assembly 2, so that the driven gear 32 can drive at least a part of the driving assembly 2 to rotate synchronously. The diameter of the driven gear 32 is greater than that of the driving gear 31, and the transmission ratio of the transmission assembly 3 can be obtained according to the gear ratio of the driven gear 32 and the driving gear 31, and then the rotation angle ratio of the rotating shaft 1 and at least a part of the driving assembly 2 can be obtained.

[0052] Referring to FIG. 2, the driving assembly 2 can include an actuator 21 and a tension assembly 22 connected with each other. The actuator 21 is fixedly connected with the driven gear 32, for example, the actuator 21 is fixedly connected with the driven gear 32 by a fastener such as a screw. The actuator 21 rotates with the driven gear 32 driven by the driven gear 32, and the actuator 21 can convert rotation into linear motion. The tension assembly 22 is connected with the actuator 21, and when the actuator 21 converts rotation into linear motion, the tension assembly 22 connected with the actuator 21 can be driven to move linearly. One end of the tension assembly 22 can be directly or indirectly connected with the superconducting coil to drive the superconducting coil to move, thereby adjusting the position of the superconducting coil. The actuator 21 can be a differential screw, the outer wheel of the differential screw is connected with the driven gear 32 to rotate synchronously with the driven gear 32, and the inner wheel of the differential screw is threadedly connected with the outer wheel to convert the rotation of the outer wheel into linear motion of the inner wheel; the tension assembly 22 is connected with the inner wheel of the differential screw so that the actuator 21 can drive the tension assembly 22 to move linearly.

[0053] In some possible ways, to improve the adjustment stroke of the superconducting coil by the driving assembly 2, when the actuator 21 adopts a differential screw, the inner wheel of the differential screw is lower than the outer wheel of the differential screw in the height direction of the superconducting coil adjustment unit 100, so that the inner wheel of the differential screw has a greater movement stroke, thereby improving the adjustment stroke of the superconducting coil by the driving assembly 2. To adjust the height between the inner wheel and the outer wheel of the differential screw, the inner wheel of the differential screw is provided with an adjusting hole 211 that can be matched with a wrench, the inner wheel of the differential screw is adjusted by inserting the wrench into the adjusting hole 211, and then the inner wheel of the differential screw can be lower than the outer wheel of the differential screw in the height direction of the superconducting coil adjustment unit 100.

[0054] In some possible ways, the tension assembly 22 includes a tension cup 223, a pull rod 224, and a hexagonal sealing plate 225. The pull rod 224 can be connected to the actuator 21 and the superconducting coil, respectively. Specifically, the pull rod 224 can include a first rod body 2241 and a second rod body 2242. One end of the first rod body 2241 is connected to the actuator 21, and the other end is connected to the hexagonal sealing plate 225; the hexagonal sealing plate 225 is connected to the tension cup 223; one end of the second rod body 2242 is connected to the tension cup 223, and the other end is used to be directly or indirectly connected to the superconducting coil. Therefore, the driving force generated by the actuator 21 can be transmitted to the superconducting coil through the first rod body 2241 of the pull rod 224, the hexagonal sealing plate 225, the tension cup 223, and the second rod body 2242 of the pull rod 224 in sequence, thereby adjusting the position of the superconducting coil.

[0055] Referring to FIG. 1, in some possible ways, the tension assembly 22 can be indirectly connected with the superconducting coil, for example, the second section of the rod body 2242 of the tension rod 224 in the tension assembly 22 is connected with the adjusting assembly 300 connected with the superconducting coil, so that the tension assembly 22 is connected with the superconducting coil through the adjusting assembly 300. Specifically, the end of the tension assembly 22 for connecting with the superconducting coil is provided with the connecting part 221 and the fixing part 222, that is, the end of the second section of the rod body 2242 of the tension rod 224 facing the coil is provided with the connecting part 221 and the fixing part 222. The connecting part 221 includes the connecting cavity 2211 and the fixing hole 2212 in communication with the connecting cavity 2211. The connecting cavity 2211 is used to accommodate part of the structure of the adjusting assembly 300. The connecting cavity 2211 can be recessed from the end face of the connecting part 221 facing the superconducting coil, so that the adjusting assembly 300 can be inserted into the connecting cavity 2211 from the end of the connecting part 221 facing the superconducting coil. The fixing hole 2212 can pass through the connecting part 221 along the radial direction of the tension assembly 22, and the fixing hole 2212 can be in communication with the connecting cavity 2211. The fixing hole 2212 is used for the fixing part 222 to pass through, and at least part of the fixing hole 2212 can cooperate with the fixing part 222 to realize the fixed connection between the fixing part 222 and the connecting part 221 forming the fixing hole 2212. For example, part of the fixing hole 2212 forms a threaded hole, the fixing part 222 is a screw, and the fixing part 222 can be screwed with the fixing hole 2212 to realize the fixation of the fixing part 222 and the connecting part 221; or part of the fixing hole 2212 and the fixing part 222 form an interference fit to realize the fixation of the fixing part 222 and the connecting part 221. When part of the structure of the adjusting assembly 300 is inserted into the connecting cavity 2211, the fixing part 222 can pass through the fixing hole 2212 and the adjusting assembly 300 and be fixedly connected with the tension assembly 22, while the adjusting assembly 300 sleeved on the fixing part 222 remains relatively fixed with the connecting part 221, so that the adjusting assembly 300 remains relatively fixed with the tension assembly 22, for example, the adjusting assembly 300 remains relatively fixed with the tension assembly 22 at least along the axial direction of the tension assembly 22.

[0056] In some possible implementation manners, the tension assembly 22 can be connected with the pressure detection member 5. When the tension assembly 22 moves, the tension assembly 22 can exert a force on the superconducting coil to adjust the position of the superconducting coil. The pressure detection member 5 can be used to detect the force exerted by the tension assembly 22 on the superconducting coil, so as to make a corresponding adjustment to the superconducting coil. Specifically, the tension cup 223 and the hexagonal sealing plate 225 in the tension assembly 22 can jointly enclose an installation space for accommodating the pressure detection member 5, the pressure detection member 5 is accommodated in the installation space enclosed by the tension cup 223 and the hexagonal sealing plate 225, and the pressure detection member 5 can be sleeved on the second segment rod body 2242 of the pull rod 224. When the tension assembly 22 exerts a force on the superconducting coil, the pressure detection member 5 installed on the tension assembly 22 can detect the force exerted by the tension assembly 22 on the superconducting coil.

[0057] Referring to FIG. 2, in some possible implementation manners, to limit the adjustment amount of the superconducting coil adjustment unit 100 to the superconducting coil, so as to avoid excessive adjustment of the position of the superconducting coil by the superconducting coil adjustment unit 100, the superconducting coil adjustment unit 100 further includes a limiting member 6. The limiting member 6 is fixedly connected with the tension assembly 22, for example, the limiting member 6 is sleeved on the tension cup 223 in the tension assembly 22 and is in interference fit with the tension cup 223 in the tension assembly 22. The housing 7 has a limiting space 71 formed therein for accommodating the limiting member 6, and the limiting space 71 extends along the movement direction of the tension assembly 22, for example, along the axial direction of the tension assembly 22. The wall forming the limiting space 71 is at least partially laminated with the limiting member 6 along the movement direction of the tension assembly 22, so that the limiting member 6 can abut against the wall forming the limiting space 71 when the limiting member 6 moves, thereby limiting the movement range of the limiting member 6 and limiting the movement range of the tension assembly 22. As a preferred manner, the wall forming the limiting space 71 limits the limiting member 6 at opposite ends along the movement direction of the tension assembly 22.

[0058] In addition, the housing 7 can further be provided with a protruding column 72 capable of extending into the limiting space 71, and the protruding column 72 can be arranged at one end of the tension assembly 22 facing the superconducting coil, so that the protruding column 72 can limit the movement range of the tension assembly 22 along the direction towards the superconducting coil. Specifically, the protruding column 72 is arranged at one end of the tension cup 223 facing the superconducting coil, and the protruding column 72 can abut against the tension cup 223 to limit the further movement of the tension cup 223 along the direction towards the superconducting coil, thereby limiting the movement range of the tension assembly 22 along the direction towards the superconducting coil.

[0059] The detection element 4 is connected with the actuator 21 and is used to detect the rotation angle of the actuator 21. The rotation angle of the actuator 21 is positively correlated with the movement amount of the tension assembly 22, and the displacement of the tension assembly 22 can be calculated according to the rotation angle of the actuator 21, and then the displacement of the superconducting coil driven by the tension assembly 22 is obtained. For example, when the actuator 21 is threadedly engaged with the tension assembly 22 to realize the conversion of rotary motion into linear motion, by obtaining the corresponding thread parameters of the actuator 21 and the tension assembly 22, the displacement of the tension assembly 22 after the actuator 21 rotates a certain angle can be calculated according to the existing calculation method, and then the displacement of the superconducting coil driven by the tension assembly 22 is obtained. The detection element 4 can be a potentiometer. When the driving assembly 2 moves, the detection element 4 can detect the rotation angle of the actuator 21 in real time, so as to monitor the displacement of the tension assembly 22 and the superconducting coil in real time.

[0060] Referring to FIG. 4, the application further provides a superconducting coil adjusting device, which comprises the superconducting coil adjusting unit 100, the driving unit 200 connected with the rotating shaft 1 of the superconducting coil adjusting unit 100 and used to drive the rotating shaft 1 to rotate, and the adjusting assembly 300 used to be connected with the superconducting coil and the tension assembly 22, and can further comprise a control unit.

[0061] One end of the adjusting assembly 300 is connected with the tension assembly 22, so that the tension assembly 22 can drive the adjusting assembly 300 to move; the other end of the adjusting assembly 300 is directly or indirectly connected with the superconducting coil, and the adjusting assembly 300 can drive the superconducting coil to move through the power transmitted by the tension assembly 22, and then the position of the superconducting coil is adjusted.

[0062] Referring to FIG. 5, in some possible modes, the adjusting assembly 300 can include a tension rod 301, and a first fitting 302 and a second fitting 303 distributed at opposite ends of the tension rod 301. The first fitting 302 is fixedly connected to one end of the tension rod 301 away from the superconducting coil, for example, the first fitting 302 is threadedly connected to one end of the tension rod 301 away from the superconducting coil. The first fitting 302 is also used to be connected with the connecting portion 221 of the tension assembly 22. Specifically, a part of the first fitting 302 extends into the connecting cavity 2211 of the connecting portion 221, and the part of the first fitting 302 extending into the connecting cavity 2211 is provided with a through hole matched with the fixing piece 222. When the first fitting 302 extends into the connecting cavity 2211, the fixing piece 222 can pass through the fixing hole 2212 of the connecting portion 221 and the through hole of the first fitting 302, and is fixedly connected with the connecting portion 221, so as to realize the relative fixation between the first fitting 302 and the connecting portion 221. The second fitting 303 is used to be directly or indirectly connected with the superconducting coil. When the tension assembly 22 moves, the tension assembly 22 will exert a force on the tension rod 301 through the first fitting 302, and then the tension rod 301 will transmit the force to the second fitting 303 to act on the superconducting coil.

[0063] The control unit is connected with the detection element 4 and the driving unit 200 respectively. The information detected by the detection element 4 can be transmitted to the control unit, so that the control unit can obtain the actual displacement amount of the tension assembly 22 and the superconducting coil. The control unit can control the driving unit 200 according to the actual displacement amount of the tension assembly 22. Specifically, when it is necessary to adjust the position of the superconducting coil, the tension assembly 22 needs to be driven to move a required distance so as to make the superconducting coil move to a specified position; at this time, the control unit controls the driving unit 200 to move, and the displacement amount of the tension assembly 22 is detected in real time through the detection element 4; when the displacement amount of the tension assembly 22 is equal to the required moving distance of the tension assembly 22, the control unit controls the driving unit 200 to stop. The driving unit 200 can specifically include a motor 201 and a transmission rod 202 connected with the motor 201, the motor 201 drives the transmission rod 202 to rotate, and one end of the transmission rod 202 is sleeved on the rotating shaft 1 in the superconducting coil adjusting unit 100 to drive the rotating shaft 1 to move synchronously.

[0064] The control unit can be any applicable computing device, such as a personal computer, a server, a programmable logic controller (PLC controller), a single-chip microcomputer, an upper computer, etc., or an integration of computer devices. The control unit can have functions of receiving information and sending control commands, and can control each component to perform corresponding actions through wired communication or wireless communication.

[0065] The application further provides a cyclotron comprising the superconducting coil adjusting device, the superconducting coil and a mounting bracket (not shown in the figure) for mounting the superconducting coil, and can further comprise an iron yoke.

[0066] The mounting bracket is provided with a mounting space for accommodating the superconducting coil, and the superconducting coil can be suspended in the iron yoke after being mounted in the mounting bracket. The mounting bracket can be connected with the superconducting coil adjusting device, so that the superconducting coil adjusting device can adjust the position of the mounting bracket, thereby adjusting the position of the superconducting coil mounted in the mounting bracket. Specifically, the mounting bracket can be a coil framework in a cryostat.

[0067] To facilitate the connection between the mounting bracket and the superconducting coil adjusting device, the outer wall of the mounting bracket can be provided with a mating part matched with the superconducting coil adjusting device. The superconducting coil adjusting device can adjust the position of the mounting bracket and the superconducting coil mounted in the mounting bracket by exerting a force on the mating part. Specifically, the mating part can include a threaded column and a nut threadedly connected with the threaded column. The second matching part 303 of the adjusting assembly 300 of the superconducting coil adjusting device can be sleeved on the nut. For example, the second matching part 303 is provided with a mating cavity matched with the nut, and the shape of the mating cavity is the same as or similar to that of the nut. When the second matching part 303 is sleeved on the nut, the nut can be driven to move synchronously with the second matching part 303, thereby adjusting the mating part.

[0068] The mounting bracket can be provided with one or more mating parts, and the superconducting coil adjusting device can also be provided with one or more, and each mating part can be connected with one superconducting coil adjusting device. As a preferred embodiment, the mounting bracket is provided with at least one pair of mating parts, and the superconducting coil adjusting device is also provided with at least one pair of superconducting coil adjusting devices. The one pair of mating parts are distributed at opposite ends of the superconducting coil, and the one pair of superconducting coil adjusting devices connected with the one pair of mating parts are also distributed at opposite ends of the superconducting coil, so that the one pair of superconducting coil adjusting devices can adjust the position of the superconducting coil along an axis through the one pair of mating parts.

[0069] Specifically, when the superconducting coil needs to be adjusted along the X-axis direction during the operation of the cyclotron, a fitting part can be arranged at each of the opposite ends of the mounting bracket along the X-axis, and each fitting part is connected with a superconducting coil adjusting device. A pair of superconducting coil adjusting devices can adjust the superconducting coil along the positive direction or the negative direction of the X-axis. When the superconducting coil needs to be adjusted along the Y-axis direction and / or the Z-axis direction during the operation of the cyclotron, a fitting part can be arranged at each of the opposite ends of the mounting bracket along the Y-axis and / or the Z-axis, and each fitting part is connected with a superconducting coil adjusting device. The X-axis, the Y-axis and the Z-axis can be perpendicular to each other, and the X-axis, the Y-axis and the Z-axis can intersect at the physical center of the cyclotron.

[0070] In some possible manners, in order to facilitate detection of whether the position of the superconducting coil is deviated, the cyclotron can be provided with a plurality of magnetic field detection members. The plurality of magnetic field detection members can be distributed at different positions of the cyclotron at intervals, so as to detect the magnetic field strengths at different positions of the cyclotron. The magnetic field information detected by the plurality of magnetic field detection members can be fed back to a control unit of the superconducting coil adjusting device. The control unit can determine whether the position of the superconducting coil is deviated according to the magnetic field information detected by the plurality of magnetic field detection members. The control unit can also determine the deviation amount of the superconducting coil according to the magnetic field information detected by the plurality of magnetic field detection members, and then control the corresponding superconducting coil adjusting device to adjust the position of the superconducting coil. The magnetic field detection member can be a Hall sensor for detecting a magnetic field.

[0071] The control unit can prestore the size and shape of the magnetic field detected by the plurality of magnetic field detection members when the superconducting coil is located at a specified position (the center axis of the superconducting coil is concentric with the physical center axis of the cyclotron). Then, during the operation of the cyclotron, the plurality of magnetic field detection members detect the magnetic field at the corresponding position, and the control unit obtains the size and shape of the actual magnetic field measured by the plurality of magnetic field detection members. By comparing whether there is a difference between the size and shape of the actual magnetic field and the size and shape of the magnetic field prestored by the control unit, when there is a difference between the size and shape of the actual magnetic field and the size and shape of the magnetic field prestored by the control unit, it can be determined that the superconducting coil is deviated. When the size and shape of the actual magnetic field are the same as the size and shape of the magnetic field prestored by the control unit, it can be determined that the superconducting coil is located at the specified position. In addition, according to the change amount between the size and shape of the actual magnetic field and the size and shape of the magnetic field prestored by the control unit, the specific or approximate deviation amount of the superconducting coil can be determined, for example, including the deviation amount of the superconducting coil along the X-axis, the Y-axis and the Z-axis. Then, the position of the superconducting coil is adjusted by adjusting the superconducting coil adjusting device located in the corresponding axial direction.

[0072] In other possible manners, the cyclotron can also be provided with a magnetic field detection device to detect the magnetic field strength at a plurality of different positions of the cyclotron. The magnetic field detection device comprises a detection end and a driving component. The detection end is used to detect the magnetic field strength at the position where the detection end is located. The driving component is used to drive the detection end to move so that the detection end can move to a plurality of positions in the cyclotron, thereby measuring the magnetic field strength at the plurality of positions in the cyclotron. The detection end can be a Hall sensor for detecting the magnetic field.

[0073] The application also provides a superconducting coil debugging method, which can be applied to the above-mentioned cyclotron. The superconducting coil debugging method comprises steps S01 and S02, and can also comprise step S03.

[0074] Step S01: Obtain the offset of the superconducting coil, and obtain the required adjustment amount of each superconducting coil adjustment device through the offset of the superconducting coil.

[0075] Step S02: Each superconducting coil adjustment device controls the driving unit 200 to operate according to the required adjustment amount, so as to drive the superconducting coil to be adjusted to the specified position.

[0076] Step S03: The rotation angle of the actuator 21 under the driving of the driving unit 200 is monitored through the detection element 4, so as to obtain the actual adjustment amount of the superconducting coil adjustment device. When the actual adjustment amount of the superconducting coil adjustment device is the same as the required adjustment amount of the superconducting coil adjustment device, the driving unit 200 stops operating.

[0077] In step S01, the offset of the superconducting coil can be determined by the magnetic field information detected by the plurality of magnetic field detection members or the magnetic field detection device provided in the cyclotron. The offset of the superconducting coil can directly obtain an accurate value to indicate the adjustment amount of the superconducting coil adjustment device to the superconducting coil; or the offset of the superconducting coil can obtain a general range to indicate the superconducting coil adjustment device to preliminarily adjust the superconducting coil, and then perform real-time analysis according to the magnetic field information detected by the plurality of magnetic field detection members or the magnetic field detection device, to determine the offset between the superconducting coil and the predetermined position in real time, and obtain the real-time offset of the superconducting coil according to the change of the position of the superconducting coil, and then indicate the superconducting coil adjustment device to adjust the superconducting coil in real time.

[0078] In step S02, the adjustment amount of the superconducting coil adjustment device to the superconducting coil is positively correlated with the moving distance of the tension assembly 22 of the driving assembly 2. According to the required adjustment amount of the superconducting coil adjustment device to the superconducting coil, the required moving distance of the tension assembly 22 can be obtained, and then the required rotation angle of the actuator 21 can be obtained. The actuator 21 is driven to rotate by the driving unit 200 to the required rotation angle, so as to drive the superconducting coil to be adjusted to the specified position.

[0079] Step S03 can be performed simultaneously with step S02, and the detection element 4 is used to detect the real-time rotation angle of the actuator 21, and when the real-time rotation angle of the actuator 21 is equal to the required rotation angle of the actuator 21, the actual adjustment amount of the superconducting coil adjustment device is equal to the required adjustment amount of the superconducting coil adjustment device, and the driving unit 200 stops running.

[0080] The application also provides a radiotherapy device, which comprises a treatment gantry (not shown), a particle accelerator (not shown) for generating a particle beam, a scanning magnet (not shown), an ionization chamber (not shown), and a range adjuster (not shown), wherein the treatment gantry comprises an arm, the particle accelerator can be the cyclotron described above, and the radiotherapy device can be configured without a beam transport line, the particle accelerator is installed on the treatment gantry and can rotate with the treatment gantry, and the treatment gantry can also be referred to as a rotating gantry. In some possible manners, the radiotherapy device is a proton therapy device, the particle accelerator can be a proton accelerator, and the particle beam can be a proton beam. The particle beam is also referred to as the particle beam flow. A particle beam transport system is used to transport the particle beam from the accelerator to the patient, and the particle beam transport system precisely transports the particle beam to a treatment position through magnetic field control, thereby ensuring accurate positioning and transmission of the particle beam. The particle beam transport system can comprise components, such as the scanning magnet, the ionization chamber, an adaptive aperture, and the like, through which the particle beam flows. The scanning magnet can move the particle beam in the X direction and / or the Y direction by appropriately changing the magnetic field, and the X direction and the Y direction are perpendicular to each other. The ionization chamber can be used to measure the dose size and / or position of the beam. The adaptive aperture can also form an adaptive aperture, which can be adaptively adjusted according to the shape and size of the target region, so that the shape and size of the particle beam can match the shape of the tumor. The advantage of such adaptive irradiation is that it can better adapt to irregularly shaped tumors, and improve the personalization and targeting of the irradiation plan. The combination of the scanning magnet, the ionization chamber, the range adjuster (also referred to as a range shifter), and the adaptive aperture can provide precise and flexible radiotherapy for patients.

[0081] The accelerator is installed on the treatment gantry and can rotate with the treatment gantry. Such an integrated design can reduce the complexity of the device, because the beam transport line is not needed, thereby simplifying the structure of the device. This also improves the stability of the beam, because the beam transport line inevitably introduces factors that cause instability of the beam. The radiotherapy device does not need a beam transport line, thereby reducing the maintenance cost and failure rate of the device and improving the stability and reliability of the device. The introduction of unstable factors is reduced, and the movement of the beam is more stable, which helps to maintain the stability of the particle beam and ensure accurate irradiation.

Claims

1. A superconducting coil conditioning unit, wherein, The superconducting coil adjusting unit comprises: a rotating shaft (1) for being connected with an external driving unit (200) and being capable of rotating under the driving of the driving unit (200); a driving assembly (2) comprising an actuator (21) and a tension assembly (22) connected with each other, the actuator (21) being used for driving the tension assembly (22) to move linearly by rotating, one end of the tension assembly (22) being used for being connected with a superconducting coil and being capable of driving the superconducting coil to move; a transmission assembly (3) connected with the rotating shaft (1) and the actuator (21) respectively and being used for transmitting the power generated by the rotating shaft (1) to the actuator (21) to drive at least a part of the actuator (21) to rotate; a detection element (4) connected with the actuator (21) and detecting the rotating angle of the actuator (21) to monitor the displacement of the tension assembly (22) and the superconducting coil.

2. The superconducting coil conditioning unit of claim 1, wherein, The transmission assembly (3) comprises a driving gear (31) sleeved on the rotating shaft (1) and a driven gear (32) fixedly connected with the actuator (21), the driving gear (31) is engaged with the driven gear (32) to transmit the power of the rotating shaft (1) to the actuator (21); and / or, the actuator (21) is a differential screw, and the inner wheel of the differential screw is lower than the outer wheel of the differential screw in the height direction of the superconducting coil adjusting unit.

3. The superconducting coil conditioning unit of claim 1, wherein, The tension assembly (22) is connected with a pressure detection element (5) used for detecting the acting force of the tension assembly (22) on the superconducting coil; and / or, the detection element (4) is a potentiometer.

4. The superconducting coil conditioning unit of claim 1, wherein, Further comprising a limiting element (6) connected with the tension assembly (22) and a shell (7) in which a limiting space (71) for accommodating the limiting element (6) is formed, the wall forming the limiting space (71) is at least partially laminated with the limiting element (6) in the moving direction of the tension assembly (22) to limit the moving range of the limiting element (6); and / or, the shell (7) is provided with a protruding column (72) capable of extending into the limiting space (71), the protruding column (72) is arranged at the end of the tension assembly (22) facing the superconducting coil to limit the moving range of the tension assembly (22).

5. The superconducting coil conditioning unit of claim 1, wherein, The end of the tension assembly (22) for being connected with the superconducting coil is provided with a connecting part (221) and a fixing element (222), the connecting part (221) comprises a connecting cavity (2211) and a fixing hole (2212) in communication with the connecting cavity (2211), the connecting cavity (2211) is used for accommodating an adjusting assembly (300) connected with the superconducting coil, the fixing element (222) penetrates into the connecting cavity (2211) through the fixing hole (2212) and fixes the adjusting assembly (300).

6. A superconducting coil conditioning apparatus, wherein, The superconducting coil adjusting unit comprises: the superconducting coil adjusting unit according to any one of claims 1 to 5; A driving unit (200) is connected with the rotating shaft (1) of the superconducting coil adjusting unit and used to drive the rotating shaft (1) to rotate; An adjusting assembly (300) is used to connect with the superconducting coil at one end and connect with the tension assembly (22) of the superconducting coil adjusting unit at the other end, and the tension assembly (22) drives the superconducting coil to move through the adjusting assembly (300).

7. The superconducting coil conditioning apparatus of claim 6, wherein, A control unit is further included and connected with the detection element (4) and the driving unit (200) respectively to receive the detection information of the detection element (4) and control the driving unit (200) to operate.

8. The superconducting coil conditioning apparatus of claim 6, wherein, The tension assembly (22) is provided with a connecting part (221) and a fixing part (222) at the end used to connect with the superconducting coil; the adjusting assembly (300) includes a tension rod (301) and a first matching part (302) and a second matching part (303) distributed at opposite ends of the tension rod (301), the first matching part (302) is used to connect with the superconducting coil, and the second matching part (303) is used to connect with the connecting part (221) of the tension assembly (22) and fixed relative to the tension assembly (22) through the fixing part (222).

9. A cyclotron, wherein, The superconducting coil adjusting device includes: at least one superconducting coil adjusting device as claimed in any one of claims 6 to 8; a superconducting coil; a mounting bracket provided with a mounting space used to accommodate the superconducting coil, and the mounting bracket includes at least one matching part used to match with the superconducting coil device, and the superconducting coil adjusting device adjusts the position of the mounting bracket and the superconducting coil mounted in the mounting bracket through the matching part.

10. The cyclotron of claim 9, wherein, The superconducting coil adjusting device is provided with at least one pair, and one pair of the superconducting coil adjusting devices is distributed at opposite ends of the superconducting coil and used to adjust the position of the superconducting coil along an axis.

11. The cyclotron of claim 9, wherein, A plurality of magnetic field detection elements are further included and spaced apart to measure the magnetic field strength at a plurality of positions in the cyclotron; Or, a magnetic field detection device is further included and includes a detection end and a driving part, the detection end is used to detect the magnetic field strength at the position where the detection end is located, and the driving part is used to drive the detection end to move to measure the magnetic field strength at a plurality of positions in the cyclotron.

12. A superconducting coil commissioning method, wherein, The superconducting coil adjusting method is applied to the cyclotron as claimed in any one of claims 9 to 11, and the superconducting coil adjusting method includes: obtaining the offset of the superconducting coil and obtaining the required adjustment amount of each superconducting coil adjusting device through the offset of the superconducting coil; each superconducting coil adjusting device controls the driving unit (200) to operate according to the required adjustment amount to drive the superconducting coil to be adjusted to a specified position.

13. The superconducting coil commissioning method of claim 12, wherein, Further include: The rotation angle of the actuator (21) under the driving of the driving unit (200) is monitored by the detecting element (4) to obtain the actual adjustment amount of the superconducting coil adjustment device, and the driving unit (200) stops running when the actual adjustment amount of the superconducting coil adjustment device is the same as the required adjustment amount of the superconducting coil adjustment device.

14. A radiotherapy apparatus wherein, A cyclotron comprising the superconducting magnet of any one of claims 9 to 11.

Images