Accelerating tube replacing device for medical linear accelerator

Abstract

The utility model relates to the technical field of accelerators, in particular to an accelerating tube replacement device for a medical linear accelerator, which comprises a replacement cylinder and an accelerating tube holder, a cavity is arranged in the replacement cylinder, the accelerating tube holder is arranged in the cavity and comprises a clamping seat and a plurality of clamping blocks, and the clamping blocks are arranged on the clamping seat. The clamping base is of an annular structure, and the multiple clamping blocks are arranged on the inner side of the clamping base. A sliding block is fixedly installed on the upper side of the clamping block, a sliding groove for the sliding block to slide is formed in the lower side of the clamping base, a guide rod is installed in the sliding groove, and the sliding block is in sliding connection with the guide rod. When the accelerating tube is disassembled and assembled, the accelerating tube is stored in the cavity of the replacing cylinder, so that the accelerating tube is prevented from being exposed in the external environment, the contact probability of the accelerating tube and a worker is reduced, harmful substances in the accelerating tube are prevented from damaging a human body, and the body health of the worker is guaranteed.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of accelerators, in particular to an accelerating tube replacement device for a medical linear accelerator. Background Art

[0002] A medical accelerator is a particle accelerator device used in biomedicine for radiotherapy of tumors. A charged particle accelerator is an electromagnetic device that uses artificial methods to accelerate various types of charged particles to higher energy with the help of electric fields of different forms. It is often called a "particle accelerator" or "accelerator" for short. In order for charged particles to gain energy, there must be an accelerating electric field. Accelerators are divided into various types based on the different types of accelerated particles, the different forms of the accelerating electric field, and the different trajectories followed by the particle acceleration process. Internationally, the most commonly used in radiotherapy is the electron linear accelerator.

[0003] The accelerating tube in a medical accelerator is a core component. Its function is to accelerate electrons to generate high-energy X-rays or electron beams for radiotherapy. The accelerating tube of a medical accelerator is easily exposed to the external environment during the disassembly and assembly process, causing harmful substances inside the accelerating tube to contact the human body and harm the health of the staff. Utility Model Content

[0004] The utility model aims to provide an accelerating tube replacement device for a medical linear accelerator to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an accelerating tube replacement device for a medical linear accelerator, comprising a replacement tube and an accelerating tube clamper, the replacement tube having a cavity provided inside, the accelerating tube clamper being arranged inside the cavity, the accelerating tube clamper comprising a clamping seat and a plurality of clamping blocks, the clamping seat being an annular structure, the inner side of the clamping seat being provided with a plurality of the clamping blocks; a sliding block is fixedly installed on the upper side of the clamping block, a sliding groove for sliding the sliding block is provided on the lower side of the clamping seat, a guide rod is installed inside the sliding groove, the sliding block is slidably connected with the guide rod, the sliding block is made of iron material, an electromagnet is installed on the side wall of the sliding groove facing the sliding block; two second rotating shafts are symmetrically rotatably installed on the left and right sides of the cavity, a threaded section is provided on the second rotating shaft, a threaded hole matching the threaded section is provided on the clamping seat, and the clamping seat is threadedly connected with the second rotating shaft through the threaded hole.

[0006] As a further solution of the utility model: a connecting spring is also sleeved on the guide rod, one side of the connecting spring is connected to the sliding block, and the other side of the connecting spring is connected to the inner wall of the sliding groove.

[0007] As a further solution of the utility model: pulleys are installed on the two second rotating shafts, and the two pulleys are connected by a synchronous belt transmission. The end of one of the second rotating shafts extends out of the tail of the replacement cylinder, and the tail of the replacement cylinder is provided with a second motor for controlling the rotation of the second rotating shaft.

[0008] As a further solution of the utility model: a plurality of fixing part disassembly and assembly mechanisms are provided on the side of the replacement cylinder, and the fixing part disassembly and assembly mechanisms include a rotating shaft rotatably connected to the side of the replacement cylinder and a disassembly head arranged at the lower end of the rotating shaft, and the disassembly head is connected to the rotating shaft through an elastic telescopic rod.

[0009] As a further solution of the utility model: a driven gear is fixedly installed on the upper end of the rotating shaft, a gear ring is rotatably installed on the tail of the replacement cylinder, an outer gear ring and an inner gear ring are respectively provided on both sides of the gear ring, and the outer gear ring is meshed with the driven gear; a first rotating shaft is also rotatably installed on the tail of the replacement cylinder, a driving gear is fixedly installed on the first rotating shaft, and the driving gear is meshed with the inner gear ring.

[0010] As a further solution of the utility model: a first motor for controlling the rotation of the first rotating shaft is provided at the tail of the replacement cylinder.

[0011] As a further solution of the utility model: a front cover is detachably mounted on the end of the replacement cylinder; and a rear cover is detachably mounted on the tail of the replacement cylinder.

[0012] Compared with the prior art, the utility model has the following beneficial effects: when the accelerating tube is disassembled and assembled, the accelerating tube is stored in the cavity of the replacement tube, so that the accelerating tube is prevented from being exposed to the external environment, the contact probability between the accelerating tube and the staff is reduced, and harmful substances in the accelerating tube are prevented from harming the human body, thereby ensuring the health of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of an accelerating tube replacement device for a medical linear accelerator;

[0014] Figure 2 A schematic diagram of a structure in which a front cover is removed from an accelerating tube replacement device for a medical linear accelerator;

[0015] Figure 3 A schematic diagram of a structure in which a rear cover is removed from an accelerating tube replacement device for a medical linear accelerator;

[0016] Figure 4 It is a partial cross-sectional view of an accelerating tube replacement device for a medical linear accelerator;

[0017] Figure 5 It is a structural schematic diagram of an accelerating tube holder in an accelerating tube replacement device for a medical linear accelerator;

[0018] Figure 6 Schematic diagram of the structure of the accelerating tube and the protective cover.

[0019] In the figure: 10-replacement cylinder, 11-rear cover, 12-front cover, 13-gear ring, 14-first rotating shaft, 141-driving gear, 15-second rotating shaft, 16-synchronous belt, 17-first motor, 18-second motor, 20-fixed part disassembly and assembly mechanism, 21-disassembly head, 22-rotating shaft, 23-driven gear, 24-elastic telescopic rod, 30-accelerator tube clamp, 31-clamping seat, 32-clamping block, 33-slider, 34-connecting spring, 35-electromagnet, 40-accelerator tube, 50-protective cover, 51-fixing bolt. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 6 In an embodiment of the utility model, a device for replacing an accelerating tube for a medical linear accelerator includes a replacement tube 10 and an accelerating tube holder 30. The replacement tube 10 has a cavity for accommodating an accelerating tube 40. The accelerating tube holder 30 is arranged inside the cavity. The accelerating tube holder 30 includes a clamping seat 31 and a plurality of clamping blocks 32. The clamping seat 31 is an annular structure. The inner side of the clamping seat 31 is provided with a plurality of clamping blocks 32. A slider 33 is fixedly installed on the upper side of the clamping block 32. The lower side of the clamping seat 31 has a A slide groove is provided for the slide block 33 to slide, a guide rod is installed inside the slide groove, the slide block 33 is slidably connected with the guide rod, the slide block 33 is made of iron material, an electromagnet 35 is installed on the side wall of the slide groove facing the slide block 33, when the accelerating tube 40 is disassembled and installed, the electromagnet 35 is energized, so that the electromagnet 35 attracts the slide block 33 after being energized, and then the slide block 33 drives the clamping block 32 to move toward the central axis of the clamping seat 31, so that the clamping block 32 clamps and fixes the end of the accelerating tube 40. It should be noted that the electromagnet 35 and the control device for controlling the power on and off of the electromagnet 35 are prior art, and this embodiment will not be repeated here; in addition, a connecting spring 34 is also sleeved on the guide rod, one side of the connecting spring 34 is connected to the slide block 33, and the other side of the connecting spring 34 is connected to the inner wall of the slide groove, when the electromagnet 35 is powered off, the slide block 33 drives the clamping block 32 to reset under the elastic force of the connecting spring 34.

[0022] Furthermore, in the embodiment of the present application, two second rotating shafts 15 are symmetrically installed on the left and right sides of the cavity for rotation, and the second rotating shafts 15 are provided with threaded sections, and the clamping seat 31 is provided with threaded holes matching the threaded sections, and the clamping seat 31 is threadedly connected with the second rotating shaft 15 through the threaded holes. When the second rotating shaft 15 is in a rotating state, the second rotating shaft 15 drives the clamping seat 31 to move up and down inside the cavity. It can be understood that when the accelerating tube 40 is installed, the clamping seat 31 is located at the upper part of the cavity, and after the opening of the cavity is aligned with the accelerating tube 40, the accelerating tube 40 is put into the cavity, and the accelerating tube 40 is clamped and fixed by the clamping block 32, and then the replacement device equipped with the accelerating tube 40 is transported to the accelerating tube installation slot of the medical accelerator, and finally The clamping seat 31 is controlled to move downward along the inside of the cavity so that the accelerating tube 40 is inserted into the installation groove; when the accelerating tube 40 is disassembled, the clamping seat 31 is located at the bottom of the cavity, the replacement device is aligned with the accelerating tube 40, and the accelerating tube 40 is clamped and fixed by the clamping block 32, and then the clamping seat 31 is controlled to move upward along the inside of the cavity so that the accelerating tube 40 is received into the cavity. In summary, the accelerating tube 40 is disassembled and assembled by the replacement device, so that the accelerating tube 40 is in the cavity during the disassembly and assembly process, thereby avoiding the accelerating tube 40 from being exposed to the external environment, reducing the probability of contact between the accelerating tube 40 and the staff, preventing harmful substances in the accelerating tube 40 from damaging the human body, and ensuring the health of the staff. It can be understood that the replacement tube 10 in this embodiment can be made of radiation-proof material.

[0023] In order to keep the two second rotating shafts 15 rotating synchronously, pulleys are installed on the two second rotating shafts 15, and the two pulleys are connected by a synchronous belt 16; in addition, the end of one of the second rotating shafts 15 extends out of the tail of the replacement cylinder 10, and the tail of the replacement cylinder 10 is provided with a second motor 18 for controlling the rotation of the second rotating shaft 15.

[0024] Since the accelerating tube 40 in the prior art needs to be equipped with a protective cover 50 at the installation slot after being installed in the medical linear accelerator, the protective cover 50 is installed on the medical linear accelerator by means of a plurality of fixing bolts 51. In order to enable the plurality of fixing bolts 51 to be installed synchronously and improve the installation efficiency of the protective cover 50, a plurality of fixing part disassembly and assembly mechanisms 20 are provided on the side of the replacement cylinder 10. The fixing part disassembly and assembly mechanisms 20 include a rotating shaft 22 rotatably connected to the side of the replacement cylinder 10 and a disassembly head 21 arranged at the lower end of the rotating shaft 22. The disassembly head 21 is connected to the rotating shaft 22 by an elastic telescopic rod 24. The disassembly head 21 is used to disassemble and install the fixing bolts 51 on the protective cover 50. Furthermore, in the embodiment of the present application, the upper end of the rotating shaft 22 A driven gear 23 is fixedly installed, and a gear ring 13 is rotatably installed at the tail of the replacement cylinder 10. An outer gear ring and an inner gear ring are respectively provided on both sides of the gear ring 13, and the outer gear ring is meshed with the driven gear 23; a first rotating shaft 14 is also rotatably installed at the tail of the replacement cylinder 10, and a driving gear 141 is fixedly installed on the first rotating shaft 14, and the driving gear 141 is meshed with the inner gear ring. A first motor 17 for controlling the rotation of the first rotating shaft 14 is provided at the tail of the replacement cylinder 10. When the first rotating shaft 14 is in a rotating state, the rotating shaft 22 is controlled to rotate through the gear ring 13, so that the rotating shaft 22 drives the disassembly and installation head 21 to rotate, thereby realizing the disassembly and installation of the fixing bolt 51. It should be noted that the direction of the rotating shaft 22 is opposite during the disassembly and installation of the fixing bolt 51.

[0025] In addition, in the embodiment of the present application, a front cover 12 is detachably installed at the end of the replacement cylinder 10. When the accelerating tube 40 is inside the replacement cylinder 10, the front cover 12 can be installed on the replacement cylinder 10 to achieve the sealing of the replacement cylinder 10; a rear cover 11 is detachably installed at the tail of the replacement cylinder 10, and the rear cover 11 is used to protect the various components at the tail of the replacement cylinder 10.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for replacing an accelerating tube for a medical linear accelerator, characterized in that: The invention comprises a replacement tube (10) and an accelerating tube holder (30), wherein a cavity is provided inside the replacement tube (10), and the accelerating tube holder (30) is arranged inside the cavity. The accelerating tube holder (30) comprises a clamping seat (31) and a plurality of clamping blocks (32), wherein the clamping seat (31) is an annular structure, and a plurality of clamping blocks (32) are provided inside the clamping seat (31); a sliding block (33) is fixedly mounted on the upper side of the clamping block (32), and a sliding block (33) is provided on the lower side of the clamping seat (31) for the sliding block (33) to slide. A movable slide groove is provided inside the slide groove, a guide rod is installed inside the slide groove, the slider (33) is slidably connected to the guide rod, the slider (33) is made of iron material, and an electromagnet (35) is installed on the side wall of the slide groove facing the slider (33); two second rotating shafts (15) are symmetrically rotatably installed on the left and right sides of the cavity, the second rotating shaft (15) is provided with a threaded section, the clamping seat (31) is provided with a threaded hole matching the threaded section, and the clamping seat (31) is threadedly connected to the second rotating shaft (15) through the threaded hole.

2. The accelerating tube replacement device for a medical linear accelerator according to claim 1, characterized in that: A connecting spring (34) is also sleeved on the guide rod, one side of the connecting spring (34) is connected to the slide block (33), and the other side of the connecting spring (34) is connected to the inner wall of the slide groove.

3. The accelerating tube replacement device for a medical linear accelerator according to claim 1, characterized in that: Pulleys are mounted on the two second rotating shafts (15), and the two pulleys are connected to each other by a synchronous belt (16). The end of one of the second rotating shafts (15) extends out of the tail of the replacement cylinder (10), and the tail of the replacement cylinder (10) is provided with a second motor (18) for controlling the rotation of the second rotating shaft (15).

4. The accelerating tube replacement device for a medical linear accelerator according to claim 1, characterized in that: A plurality of fixing component disassembly and assembly mechanisms (20) are provided on the side of the replacement cylinder (10), the fixing component disassembly and assembly mechanisms (20) comprising a rotating shaft (22) rotatably connected to the side of the replacement cylinder (10) and a disassembly and assembly head (21) provided at the lower end of the rotating shaft (22), the disassembly and assembly head (21) being connected to the rotating shaft (22) via an elastic telescopic rod (24).

5. The accelerating tube replacement device for a medical linear accelerator according to claim 4, characterized in that: A driven gear (23) is fixedly mounted on the upper end of the rotating shaft (22); a gear ring (13) is rotatably mounted on the rear end of the replacement cylinder (10); an outer gear ring and an inner gear ring are respectively provided on both sides of the gear ring (13); the outer gear ring meshes with the driven gear (23); a first rotating shaft (14) is also rotatably mounted on the rear end of the replacement cylinder (10); a driving gear (141) is fixedly mounted on the first rotating shaft (14); the driving gear (141) meshes with the inner gear ring.

6. The accelerating tube replacement device for a medical linear accelerator according to claim 5, characterized in that: A first motor (17) for controlling the rotation of the first rotating shaft (14) is provided at the rear end of the replacement cylinder (10).

7. The accelerating tube replacement device for a medical linear accelerator according to claim 6, characterized in that: A front cover (12) is detachably mounted on the end of the replacement cylinder (10); and a rear cover (11) is detachably mounted on the tail of the replacement cylinder (10).

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