Medical cyclotron beam extraction device

Abstract

The invention relates to the technical field of cyclotrons, and discloses a medical cyclotron beam extraction device which comprises a rack, a vacuum cover is installed on one side of the rack, a rotating track assembly is slidably connected to the interior of the vacuum cover, and track wheels are slidably connected to the inner wall of the rotating track assembly. And a sliding plate is mounted at one end of the rail wheel. According to the device, the stripping film support can carry three stripping films, 120-degree precise autorotation switching is achieved through electric control, film replacement can be completed without shutdown, shutdown loss caused by replacement operation is greatly reduced, more importantly, the device can avoid continuous particle bombardment in the same area by adjusting the angles of the stripping films, and the device is suitable for large-scale production. The problems of local overheating and abrasion are effectively reduced, the service life of a single film material is remarkably prolonged, the consumable cost of the film material is effectively reduced, and the actual requirement that the service life of the stripping film needs to be optimized is met.

Description

A medical cyclotron beam extraction device Technical Field

[0001] This invention relates to the field of cyclotron technology, specifically to a medical cyclotron beam extraction device. Background Technology

[0002] In today's international community, medical accelerators have made significant progress and are widely used. Among them, the vast majority of medical accelerators used to produce various radionuclides for diagnosis and treatment are cyclotrons. Of the hundreds of cyclotrons in the world, about 80% are used for medical and health and life science research. Small medical cyclotrons are mainly used to produce medical radionuclides such as 11C, 13N, 18F, and 68Ge, and then to produce radiopharmaceuticals such as FDG. These accelerators are usually compact cyclotrons equipped with liquid and solid targets. Some have been upgraded and modified to add gas target beamlines. Generally speaking, the proton beams extracted by these accelerators are not transported through long beamlines, but are directly hit on the liquid target to produce ultra-short-lived radionuclides or generate neutrons.

[0003] Existing cyclotron beam extraction systems typically use fixed stripper supports that can only accommodate one or two strippers. This method has the disadvantage that when the beam trajectory deviates from the ideal trajectory, the stripper support cannot adjust its position to guide the beam to the desired location, thus failing to control the beam envelope and beam loss in the extraction area. Furthermore, the limited number of strippers installed increases the frequency of replacement and maintenance costs. Therefore, we propose a medical cyclotron beam extraction device. Summary of the Invention

[0004] (I) Technical Problems Solved In view of the shortcomings of the existing technology, the present invention provides a medical cyclotron beam extraction device, which solves the problem that when the existing beam trajectory deviates from the ideal trajectory, the peeling membrane support cannot adjust its own position to extract the beam to the required position, control the beam envelope and beam loss in the extraction area, and the device can only install a small number of peeling membranes, which increases the frequency of peeling membrane replacement and increases maintenance costs.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A medical cyclotron beam extraction device includes a frame, a vacuum chamber mounted on one side of the frame, a rotating track assembly slidably connected inside the vacuum chamber, a track wheel slidably connected to the inner wall of the rotating track assembly, a slide plate mounted on one end of the track wheel, a first positioning frame mounted on the upper surface of the slide plate, a second coil spring mounted on the upper surface of the slide plate, a bearing mounted on the upper end of the slide plate, a peeling membrane support mounted on the bearing, the output end of the second coil spring connected to the inner wall of the peeling membrane support, and a limit end mounted on the upper end of the peeling membrane support. The cover has a second positioning frame installed on the upper surface of the slide plate, and a first coil spring installed on the upper surface of the slide plate. The output end of the first coil spring is connected to the second positioning frame. The vacuum cover is provided with an outlet channel. The peeling film support can carry three peeling films. It can achieve 120° precise self-rotation switching through electric control, and the film material can be replaced without stopping the machine. This greatly reduces downtime losses caused by replacement operations. More importantly, the device can adjust the peeling film angle to avoid continuous particle bombardment in the same area, effectively reducing local overheating and wear problems, significantly extending the service life of a single film material, effectively reducing the cost of film material consumables, and adapting to the actual needs of optimizing the peeling film life.

[0006] Furthermore, a drive mechanism is provided on the surface of the frame. The drive mechanism includes a carrier plate, which is fixedly connected to one side of the frame. A first electric cylinder is mounted on the surface of the carrier plate. A first pipe is fixedly connected to the drive end of the first electric cylinder. A first pull rope is fixedly connected inside the first electric cylinder. One end of the first pull rope is fixedly connected to the surface of the first positioning frame. The device organically integrates the drive mechanism, adjustment mechanism, vacuum hood, and rotary track assembly into core structures. Through the combination design of pull rope transmission and bellows sealing, the wear problem of the drive components being directly exposed to the vacuum environment is avoided.

[0007] Furthermore, a first resistance ruler is fixedly connected to the side of the carrier plate near the first electric cylinder, and a first connecting plate is fixedly connected to one end of the first resistance ruler. One end of the first connecting plate is installed on the drive end of the first electric cylinder.

[0008] Furthermore, a first corrugated pipe is fixedly connected to one side of the first connecting plate. The first corrugated pipe is sleeved on the drive end of the first electric cylinder, and the end of the first corrugated pipe away from the first connecting plate is fixedly connected to the surface of the first pipe, effectively protecting the first electric cylinder.

[0009] Furthermore, the surface of the frame is provided with an adjustment mechanism, which includes a mounting block. The mounting block is fixedly connected to the surface of the frame, and a second electric cylinder is mounted on the surface of the mounting block. The drive end of the second electric cylinder is fixedly connected to a second pipe, and a second pull rope is fixedly connected to the inner wall of the second electric cylinder. The surface of the peeling film support has a rope inlet hole, and a fixing buckle is fixedly connected to the inner wall of the peeling film support. One end of the second pull rope passes through the rope inlet hole and is connected to the fixing buckle. Both the drive mechanism and the adjustment mechanism are driven by electric cylinders. With the precise guidance of the pull rope by the guide wheel, the position and angle of the peeling film support can be automatically adjusted without manual operation, reducing the technical dependence and labor intensity of the operator. At the same time, the preload design of the first coil spring can form a force balance when the first electric cylinder stops, so that the peeling film support is stably maintained in the target position.

[0010] Furthermore, a second resistance ruler is fixedly connected to the side of the mounting block near the second electric cylinder. A second connecting plate is fixedly connected to one end of the second resistance ruler. One end of the second connecting plate is installed on the drive end of the second electric cylinder. The device organically integrates the drive mechanism, adjustment mechanism, vacuum hood, rotating track assembly and other core structures. Through the combination design of rope transmission and bellows sealing, it avoids the wear problem of the drive components being directly exposed to the vacuum environment, and ensures the sealing performance inside the vacuum hood.

[0011] Furthermore, a second corrugated pipe is fixedly connected to one side of the second connecting plate. The second corrugated pipe is sleeved on the drive end of the second electric cylinder, and the end of the second corrugated pipe away from the second connecting plate is fixedly connected to the surface of the second pipe.

[0012] Furthermore, a first guide wheel is rotatably connected to the inner wall of the first pipe, and the first pull rope rests on the first guide wheel. A second guide wheel is rotatably connected to the inner wall of the first pipe, and the first pull rope rests on the second guide wheel. A third guide wheel is rotatably connected to the surface of the rotating track assembly, and the first pull rope rests on the third guide wheel, effectively reducing the wear on the first pull rope.

[0013] Furthermore, a fourth guide wheel is rotatably connected to the inner wall of the second pipe, and the second pull rope rests on the fourth guide wheel. A fifth guide wheel is rotatably connected to the inner wall of the second pipe, and the second pull rope rests on the fifth guide wheel. A sixth guide wheel is rotatably connected inside the rotating track assembly, and the second pull rope rests on the sixth guide wheel. This effectively reduces wear on the second pull rope. The dual effect of alternating use of multiple peeling films and trajectory adaptation adjustment reduces abnormal bombardment and corrosion of internal components by beam deviation, lowers the risk of damage to key components, extends the overall service life of the cyclotron beam extraction system, and reduces equipment maintenance and replacement costs.

[0014] Furthermore, a mounting bracket is installed on the surface of the frame, and one side of the mounting bracket is fixedly connected to the vacuum hood, ensuring the sealing performance inside the vacuum hood. The dual function of alternating use of multiple peeling films and trajectory adaptation adjustment reduces the abnormal bombardment and corrosion of internal components by beam deviation, reduces the risk of damage to key components, extends the service life of the cyclotron beam extraction system as a whole, and reduces equipment maintenance and replacement costs.

[0015] In summary, the technical effects and advantages of this invention are as follows: 1. In this invention, the peeling film support can carry three peeling films, and achieve precise 120° self-rotation switching through electric control. The film material replacement can be completed without stopping the machine, which greatly reduces downtime losses caused by replacement operations. More importantly, the device can adjust the peeling film angle to avoid continuous particle bombardment in the same area, effectively reducing local overheating and wear problems, significantly extending the service life of a single film material, effectively reducing the cost of film material consumables, and adapting to the actual needs of optimizing the peeling film life.

[0016] 2. In this invention, both the drive mechanism and the adjustment mechanism are driven by electric cylinders. With the help of guide wheels, the pull rope is precisely guided, realizing the automatic adjustment of the position and angle of the peeling film support. No manual operation is required, reducing the technical dependence and labor intensity of the operator. At the same time, the pre-tension design of the first coil spring can form a force balance when the first electric cylinder stops, so that the peeling film support is stably maintained in the target position.

[0017] 3. In this invention, the device organically integrates the drive mechanism, adjustment mechanism, vacuum hood, rotating track assembly and other core structures. Through the combination design of rope drive and bellows sealing, it avoids the wear problem of the drive components being directly exposed to the vacuum environment, and ensures the sealing performance inside the vacuum hood. The dual effect of alternating use of multiple stripping films and trajectory adaptation adjustment reduces the abnormal bombardment and corrosion of the internal components of the equipment by beam deviation, reduces the risk of damage to key components, extends the service life of the cyclotron beam extraction system as a whole, and reduces equipment maintenance and replacement costs. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the overall structure of a medical cyclotron beam extraction device according to the present invention; Figure 2 is a schematic diagram of the structure at point A in Figure 1 of the medical cyclotron beam extraction device according to the present invention; Figure 3 is a schematic diagram of a partial structure of the medical cyclotron beam extraction device according to the present invention; Figure 4 is a schematic diagram of the exploded structure of Figure 3 of the medical cyclotron beam extraction device according to the present invention; Figure 5 is a schematic diagram of the bottom view of Figure 4 of the medical cyclotron beam extraction device according to the present invention.

[0019] In the diagram: 1. Frame; 2. Drive mechanism; 21. Carrier plate; 22. First electric cylinder; 23. First resistance gauge; 24. First connecting plate; 25. First corrugated pipe; 26. First guide wheel; 27. First pipe; 28. First pull rope; 29. ​​Second guide wheel; 210. Third guide wheel; 3. Adjustment mechanism; 31. Mounting block; 32. Second electric cylinder; 33. Second resistance gauge; 34. Second connecting plate; 35. Second corrugated pipe; 36. 37. Fourth guide wheel; 38. Second pipe; 39. Fifth guide wheel; 30. Sixth guide wheel; 310. Second pull rope; 4. Vacuum hood; 5. Outlet channel; 6. Rotary track assembly; 7. Mounting bracket; 8. First coil spring; 9. Peeling film support; 10. Slide plate; 11. Track wheel; 12. Fixing buckle; 13. Rope inlet hole; 14. Bearing; 15. Limiting end cap; 16. Second coil spring; 17. First positioning frame; 18. Second positioning frame. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Referring to Figures 1-5, a medical cyclotron beam extraction device includes a frame 1. A vacuum chamber 4 is mounted on one side of the frame 1. A rotating track assembly 6 is slidably connected inside the vacuum chamber 4. A track wheel 11 is slidably connected to the inner wall of the rotating track assembly 6. A slide plate 10 is mounted on one end of the track wheel 11. A first positioning frame 17 is mounted on the upper surface of the slide plate 10. A second coil spring 16 is mounted on the upper surface of the slide plate 10. A bearing 14 is mounted on the upper end of the slide plate 10. A peeling membrane support 9 is mounted on the bearing 14. The output end of the second coil spring 16 is connected to the inner wall of the peeling membrane support 9. A limit end cap 15 is mounted on the upper end of the peeling membrane support 9. A second positioning frame 18 is installed on the upper surface of the device, and a first coil spring 8 is installed on the upper surface of the slide plate 10. The output end of the first coil spring 8 is connected to the second positioning frame 18. An outlet channel 5 is provided on the vacuum hood 4. The peeling film support 9 can carry three peeling films. It can achieve 120° precise self-rotation switching through electric control, and the film material can be replaced without stopping the machine. This greatly reduces downtime losses caused by replacement operations. More importantly, the device can adjust the peeling film angle to avoid continuous particle bombardment in the same area, effectively reducing local overheating and wear problems, significantly extending the service life of a single film material, effectively reducing the cost of film material consumables, and adapting to the actual needs of optimizing the peeling film life.

[0022] The frame 1 is equipped with a drive mechanism 2, which includes a carrier plate 21. The carrier plate 21 is fixedly connected to one side of the frame 1. A first electric cylinder 22 is mounted on the surface of the carrier plate 21. A first pipe 27 is fixedly connected to the drive end of the first electric cylinder 22. A first pull rope 28 is fixedly connected inside the first electric cylinder 22. One end of the first pull rope 28 is fixedly connected to the surface of the first positioning frame 17. The device organically integrates the drive mechanism 2, the adjustment mechanism 3, the vacuum hood 4, the rotating track assembly 6, and other core structures. Through the combination design of pull rope transmission and bellows sealing, the wear problem of the drive components being directly exposed to the vacuum environment is avoided.

[0023] Among them, a first resistance ruler 23 is fixedly connected to the side of the carrier plate 21 near the first electric cylinder 22, and a first connecting plate 24 is fixedly connected to one end of the first resistance ruler 23. One end of the first connecting plate 24 is installed on the drive end of the first electric cylinder 22.

[0024] The first corrugated pipe 25 is fixedly connected to one side of the first connecting plate 24. The first corrugated pipe 25 is sleeved on the drive end of the first electric cylinder 22, and the end of the first corrugated pipe 25 away from the first connecting plate 24 is fixedly connected to the surface of the first pipe 27, effectively protecting the first electric cylinder 22.

[0025] The frame 1 is equipped with an adjustment mechanism 3, which includes a mounting block 31. The mounting block 31 is fixedly connected to the surface of the frame 1. A second electric cylinder 32 is mounted on the surface of the mounting block 31. A second pipe 37 is fixedly connected to the drive end of the second electric cylinder 32. A second pull rope 310 is fixedly connected to the inner wall of the second electric cylinder 32. A rope inlet hole 13 is opened on the surface of the peeling film support 9. A fixing buckle 12 is fixedly connected to the inner wall of the peeling film support 9. One end of the second pull rope 310 passes through the rope inlet hole 13 and is connected to the fixing buckle 12. Both the drive mechanism 2 and the adjustment mechanism 3 are driven by electric cylinders. With the precise guidance of the pull rope by the guide wheel, the position and angle of the peeling film support 9 can be automatically adjusted without manual operation, reducing the technical dependence and labor intensity of the operator. At the same time, the pre-tightening force design of the first coil spring 8 can form a force balance when the first electric cylinder 22 stops, so that the peeling film support 9 is stably maintained in the target position.

[0026] Among them, a second resistance ruler 33 is fixedly connected to the side of the mounting block 31 near the second electric cylinder 32. A second connecting plate 34 is fixedly connected to one end of the second resistance ruler 33. One end of the second connecting plate 34 is installed on the drive end of the second electric cylinder 32. The device organically integrates the core structures such as the drive mechanism 2, the adjustment mechanism 3, the vacuum hood 4, and the rotating track assembly 6. Through the combination design of rope transmission and bellows sealing, it avoids the wear problem of the drive components being directly exposed to the vacuum environment, and ensures the sealing performance inside the vacuum hood 4.

[0027] The second corrugated pipe 35 is fixedly connected to one side of the second connecting plate 34. The second corrugated pipe 35 is sleeved on the drive end of the second electric cylinder 32, and the end of the second corrugated pipe 35 away from the second connecting plate 34 is fixedly connected to the surface of the second pipe 37.

[0028] The inner wall of the first pipe 27 is rotatably connected to a first guide wheel 26, and the first pull rope 28 rests on the first guide wheel 26. The inner wall of the first pipe 27 is rotatably connected to a second guide wheel 29, and the first pull rope 28 rests on the second guide wheel 29. The surface of the rotating track assembly 6 is rotatably connected to a third guide wheel 210, and the first pull rope 28 rests on the third guide wheel 210, effectively reducing the wear on the first pull rope 28.

[0029] The inner wall of the second pipe 37 is rotatably connected to a fourth guide wheel 36, and the second pull rope 310 rests on the fourth guide wheel 36. The inner wall of the second pipe 37 is rotatably connected to a fifth guide wheel 38, and the second pull rope 310 rests on the fifth guide wheel 38. The inner wall of the rotating track assembly 6 is rotatably connected to a sixth guide wheel 39, and the second pull rope 310 rests on the sixth guide wheel 39. This effectively reduces the wear on the second pull rope 310. The dual effect of alternating use of multiple peeling films and trajectory adaptation adjustment reduces the abnormal bombardment and corrosion of the internal components of the equipment by the beam deviation, reduces the risk of damage to key components, extends the service life of the cyclotron beam extraction system as a whole, and reduces equipment maintenance and replacement costs.

[0030] The frame 1 is equipped with a mounting bracket 7, one side of which is fixedly connected to the vacuum hood 4, ensuring the sealing performance inside the vacuum hood 4. The dual function of alternating use of multiple stripping films and trajectory adaptation adjustment reduces the abnormal bombardment and corrosion of internal components by beam deviation, reduces the risk of damage to key components, extends the service life of the cyclotron beam extraction system as a whole, and reduces equipment maintenance and replacement costs.

[0031] Working principle of this invention: In the initial state, the vacuum chamber 4 provides the vacuum environment required for beam extraction, and the rotating track assembly 6 provides the moving basis for the peeling film support 9. Through the synergistic action of the drive mechanism 2, the adjustment mechanism 3, and the core components inside the vacuum, the position adjustment, angle switching, and stable operation of the peeling film support 9 are achieved, ultimately realizing efficient beam extraction and optimized use of the membrane material. When it is necessary to adjust the position of the peeling film support 9, the first electric cylinder 22 of the drive mechanism 2 is activated. The drive end of the first electric cylinder 22 extends or retracts, driving the first pull rope 28 to move through the first connecting plate 24. The first pull rope 28 passes sequentially around the first guide wheel 26, the second guide wheel 29 inside the first pipe 27, and the third guide wheel 210 on the surface of the rotating track assembly 6, transmitting the driving force to the slide plate 10. The slide plate 10 slides along the inner wall of the rotating track assembly 6 and drives the peeling film support 9 to move synchronously, achieving precise position adjustment. At the same time, the movement of the slide plate 10 will drive the first coil spring 8 to rotate and store force. When the first electric cylinder 22 resets and the tension disappears, the first coil spring 8 releases its spring. The force pulls the peeling film support 9 and the slide plate 10 in the opposite direction, so that the peeling film support 9 returns to its initial stable position, avoiding positional displacement caused by external interference. When it is necessary to adjust the peeling film angle or switch to different peeling films, the second electric cylinder 32 of the adjustment mechanism 3 is activated. The drive end of the second electric cylinder 32 extends or retracts, driving the second pull rope 310 to move through the second connecting plate 34. The second pull rope 310 passes through the fourth guide wheel 36, the fifth guide wheel 38 in the second pipe 37 and the sixth guide wheel 39 inside the rotating track assembly 6 in sequence, and drives the peeling film support 9 to rotate by pulling the fixing buckle 12. The second coil spring 16 is deformed by force, which facilitates the subsequent reset of the peeling film support 9, so that the peeling film support 9 can achieve a precise 120° self-rotation, completing the membrane material switching or angle adjustment without stopping the machine, avoiding the membrane material from being continuously bombarded by particles in the same area. During this period, the second resistance ruler 33 monitors the displacement of the drive end of the second electric cylinder 32 in real time through the second connecting plate 34, and feeds the data back to the control system to accurately control the pulling distance of the pull rope, ensuring that the angle adjustment error is within the allowable range.

[0032] The electrical components mentioned in this article are all connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can be used for control.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A medical cyclotron beam extraction device, comprising a frame (1), characterized in that: A vacuum hood (4) is installed on one side of the frame (1). A rotating track assembly (6) is slidably connected inside the vacuum hood (4). A track wheel (11) is slidably connected to the inner wall of the rotating track assembly (6). A slide plate (10) is installed at one end of the track wheel (11). A first positioning frame (17) is installed on the upper surface of the slide plate (10). A second coil spring (16) is installed on the upper surface of the slide plate (10). A bearing (14) is installed at the upper end of the slide plate (10). A peeling film support (9) is installed on the bearing (14). The output end of the second coil spring (16) is connected to the inner wall of the peeling film support (9). A limit end cap (15) is installed at the upper end of the peeling film support (9). A second positioning frame (18) is installed on the upper surface of the slide plate (10). A first coil spring (8) is installed on the upper surface of the slide plate (10). The output end of the first coil spring (8) is connected to the second positioning frame (18). An outlet channel (5) is provided on the vacuum hood (4).

2. The medical cyclotron beam extraction device according to claim 1, characterized in that: The surface of the frame (1) is provided with a drive mechanism (2), the drive mechanism (2) includes a carrier plate (21), the carrier plate (21) is fixedly connected to one side of the frame (1), a first electric cylinder (22) is installed on the surface of the carrier plate (21), a first pipe (27) is fixedly connected to the drive end of the first electric cylinder (22), a first pull rope (28) is fixedly connected inside the first electric cylinder (22), and one end of the first pull rope (28) is fixedly connected to the surface of the first positioning frame (17).

3. A medical cyclotron beam extraction device according to claim 2, characterized in that: The carrier plate (21) is fixedly connected to a first resistance ruler (23) on the side near the first electric cylinder (22). One end of the first resistance ruler (23) is fixedly connected to a first connecting plate (24). One end of the first connecting plate (24) is installed on the drive end of the first electric cylinder (22).

4. A medical cyclotron beam extraction device according to claim 3, characterized in that: A first corrugated pipe (25) is fixedly connected to one side of the first connecting plate (24). The first corrugated pipe (25) is sleeved on the drive end of the first electric cylinder (22), and the end of the first corrugated pipe (25) away from the first connecting plate (24) is fixedly connected to the surface of the first pipe (27).

5. A medical cyclotron beam extraction device according to claim 1, characterized in that: The surface of the frame (1) is provided with an adjustment mechanism (3). The adjustment mechanism (3) includes a mounting block (31). The mounting block (31) is fixedly connected to the surface of the frame (1). A second electric cylinder (32) is mounted on the surface of the mounting block (31). A second pipe (37) is fixedly connected to the drive end of the second electric cylinder (32). A second pull rope (310) is fixedly connected to the inner wall of the second electric cylinder (32). A rope inlet hole (13) is opened on the surface of the peeling film support (9). A fixing buckle (12) is fixedly connected to the inner wall of the peeling film support (9). One end of the second pull rope (310) passes through the rope inlet hole (13) and is connected to the fixing buckle (12).

6. A medical cyclotron beam extraction device according to claim 5, characterized in that: The mounting block (31) is fixedly connected to a second resistance ruler (33) on the side near the second electric cylinder (32). One end of the second resistance ruler (33) is fixedly connected to a second connecting plate (34). One end of the second connecting plate (34) is mounted on the drive end of the second electric cylinder (32).

7. A medical cyclotron beam extraction device according to claim 6, characterized in that: A second corrugated pipe (35) is fixedly connected to one side of the second connecting plate (34). The second corrugated pipe (35) is sleeved on the drive end of the second electric cylinder (32), and the end of the second corrugated pipe (35) away from the second connecting plate (34) is fixedly connected to the surface of the second pipe (37).

8. A medical cyclotron beam extraction device according to claim 2, characterized in that: The inner wall of the first pipe (27) is rotatably connected to a first guide wheel (26), and the first pull rope (28) rests on the first guide wheel (26). The inner wall of the first pipe (27) is rotatably connected to a second guide wheel (29), and the first pull rope (28) rests on the second guide wheel (29). The surface of the rotating track assembly (6) is rotatably connected to a third guide wheel (210), and the first pull rope (28) rests on the third guide wheel (210).

9. A medical cyclotron beam extraction device according to claim 5, characterized in that: The inner wall of the second pipe (37) is rotatably connected to a fourth guide wheel (36), and the second pull rope (310) rests on the fourth guide wheel (36). The inner wall of the second pipe (37) is rotatably connected to a fifth guide wheel (38), and the second pull rope (310) rests on the fifth guide wheel (38). The interior of the rotating track assembly (6) is rotatably connected to a sixth guide wheel (39), and the second pull rope (310) rests on the sixth guide wheel (39).

10. A medical cyclotron beam extraction device according to claim 1, characterized in that: The surface of the frame (1) is fitted with a mounting bracket (7), and one side of the mounting bracket (7) is fixedly connected to the vacuum hood (4).

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