WO2024098690A1 - Radiation protection and shielding device and cyclotron using same - Google Patents

Abstract

A radiation protection and shielding device and a cyclotron using same. The radiation protection and shielding device (100) comprises an upper shield (1), a lower shield (2), and a driving assembly (3); the upper shield (1) and the lower shield (2) define a sealed shielding space (4); the cyclotron (300) is located in the shielding space (4); the driving assembly (3) is used for driving the upper shield (1) to move in a vertical direction so as to open or close the shielding space (4). The radiation protection and shielding device (100) reduces the footprint of an apparatus and can be directly mounted in a hospital, so that the production costs of isotopes are greatly reduced, and the utilization efficiency of the isotopes is improved.

Description

Radiation protection shielding device and cyclotron using the same Technical Field

The present invention relates to the field of radioactive medicine, and in particular to a radiation protection shielding device and a cyclotron accelerator using the same.

Background technique

The cyclotron accelerators currently used to produce radioactive isotopes have a complex structure, occupy a large area, and require an independent medical production site. Also, due to the short half-life of isotopes, the utilization rate of isotope drugs becomes very low and can no longer meet the needs of medical institutions and hospitals.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a radiation protection shielding device, which can not only better shield the cyclotron from radiation, but also has a small footprint, is conducive to miniaturized design, and can meet the needs of being arranged in a medical institution, thereby enabling efficient production of medical isotopes in the medical institution, thereby reducing the isotope production cost and improving the isotope utilization rate.

According to an embodiment of the present invention, the radiation protection shielding device is used for a cyclotron, and includes an upper shielding body, a lower shielding body and a driving assembly. The upper shielding body and the lower shielding body define a sealed shielding space. The cyclotron is located in the shielding space. The driving assembly is used to drive the upper shielding body and/or the lower shielding body to move in the up and down directions to open or close the shielding space.

According to the radiation protection shielding device of the embodiment of the present invention, by providing an upper shielding body and a lower shielding body, A sealed shielding space is defined, in which the cyclotron is located, and the shielding space can be opened by moving the upper shielding body up and down, which can effectively reduce the footprint of the equipment, make the use of the equipment more flexible, and do not need to be equipped with an independent production site, and can meet the needs of being arranged in a medical institution, so that medical isotopes can be efficiently produced in the medical institution, thereby reducing the isotope production cost and improving the isotope utilization rate; by setting a driving component, the upper shielding body is driven to move in an upward direction to open the shielding space, which is convenient for maintenance of the equipment and prolongs the service life of the equipment, and the upper shielding body is driven to move in a downward direction to close the shielding space to shield radiation, thereby improving the operation efficiency of the cyclotron and the isotope utilization efficiency.

In addition, the radiation protection shielding device according to the present invention may also have the following additional technical features:

In some embodiments of the present invention, the upper shielding body and the lower shielding body both include an outer shell, an intermediate layer and an internal filling structure, the outer shell has a filling cavity, the intermediate layer and the internal filling structure are both located in the filling cavity, the intermediate layer is located between the outer shell and the internal filling structure to separate the outer shell and the internal filling structure, wherein the outer shell is made of metal material, the intermediate layer is a lead shielding layer, and the internal filling structure includes boron-containing concrete and polyethylene.

In some embodiments of the present invention, the lower shielding body is installed on the ground, the driving assembly is installed on the lower shielding body or on the ground, and the driving assembly is used to drive the upper shielding body to move in the up and down directions.

In some embodiments of the present invention, the driving assembly includes a fixed end mounting bracket, the fixed end mounting bracket is fixed to the lower shielding body or installed on the ground; a mobile end mounting bracket, the mobile end mounting bracket is fixed to the upper shielding body; a driving member, the driving member is installed in the A telescopic rod is connected between the fixed end mounting bracket and the movable end mounting bracket, and the driving member is suitable for driving the telescopic rod to move in a telescopic manner.

In some embodiments of the present invention, the driving member is a hydraulic cylinder.

In some embodiments of the present invention, the driving assembly also includes a limit assembly, which includes: a limit rod and a limit block, one of the limit rod and the limit block is installed on the fixed end mounting bracket, and the other of the limit rod and the limit block is installed on the movable end mounting bracket.

In some embodiments of the present invention, the driving assembly further includes a position limiting assembly, and the position limiting assembly includes a position sensor.

In some embodiments of the present invention, the cyclotron is installed on the ground, the shielding space has a downward opening, and the radiation protection shielding device is used to cover the cyclotron in the shielding space.

In some embodiments of the present invention, a lifting structure is provided on the top of the upper shielding body, and the lifting structure is a lifting hole or a lifting ring.

In some embodiments of the present invention, the upper shielding body has a first positioning portion, the lower shielding body has a second positioning portion, and the first positioning portion and the second positioning portion are configured as a first positioning step and a second positioning step that cooperate with each other.

The present invention also provides a cyclotron using the radiation protection shielding device.

According to the cyclotron accelerator of the embodiment of the present invention, the cyclotron accelerator is located in the shielded space, and the cyclotron accelerator includes: a magnet system, an ion source system, a radio frequency system, a stripping extraction system, a beam measurement system, a target system, a lifting system and a vacuum system. The magnet system includes an upper iron yoke cover plate, a lower iron yoke cover plate, an iron yoke waist, an upper magnet coil, a lower magnet coil, and a magnetic pole group. The magnetic pole group includes An upper fan-shaped magnetic pole and a lower fan-shaped magnetic pole, the iron yoke waist is arranged between the upper iron yoke cover plate and the lower iron yoke cover plate, and a cyclotron acceleration chamber is constructed with the upper iron yoke cover plate and the lower iron yoke cover plate, the ion source system is used to provide a particle beam toward the cyclotron acceleration chamber, the vacuum system is used to evacuate the cyclotron acceleration chamber, the two ends of the lifting system are respectively connected to the upper iron yoke cover plate and the iron yoke waist, the upper iron yoke cover plate is provided with the upper magnet coil, the lower iron yoke cover plate is provided with the lower magnet coil, the lower side surface of the upper iron yoke cover plate is installed with the upper fan-shaped magnetic pole, the upper side surface of the lower iron yoke cover plate is installed with the lower fan-shaped magnetic pole, the upper fan-shaped magnetic pole and the lower fan-shaped magnetic pole are opposite to each other up and down, wherein the radio frequency system, the stripping extraction system, the beam measurement system and the target system are all installed on the iron yoke waist.

According to the cyclotron of the embodiment of the present invention, through the reasonable classification of the upper iron yoke cover plate, the lower iron yoke cover plate and the iron yoke waist, the integrated radio frequency system, the stripping extraction system, the beam measurement system and the target system can be integrated and assembled on the iron yoke waist, which is conducive to optimizing the structural layout of the cyclotron, thereby helping to reduce the volume of the cyclotron. In addition, the upper iron yoke cover plate, the lower iron yoke cover plate and the iron yoke waist jointly construct a cyclotron acceleration chamber, which can reduce the difficulty of sealing the cyclotron acceleration chamber, and can reduce the processing difficulty of the upper iron yoke cover plate and the lower iron yoke cover plate and the size of the blank, thereby further reducing the production cost. And further, by using the radiation protection shielding device of the above embodiment of the present application, not only can the cyclotron be better shielded from radiation, but also the cyclotron and the radiation protection shielding device have a smaller footprint after being combined, which is conducive to miniaturized design and can meet the needs of being arranged in medical institutions, so that medical isotopes can be efficiently produced in the medical structure, thereby reducing the cost of isotope production and improving the utilization rate of isotopes.

Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG1 is a schematic structural diagram of the cooperation between a radiation protection shielding device and a cyclotron accelerator according to an embodiment of the present invention.

2 is a cross-sectional view of a radiation protection shielding device according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a cyclotron according to an embodiment of the present invention.

FIG. 4 is a front view of a position limiting assembly according to an embodiment of the present invention.

FIG. 5 is a perspective view of a cyclotron according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view of a cyclotron according to an embodiment of the present invention.

Reference numerals: radiation protection shielding device 100,
Upper shielding body 1, first positioning step 11, hoisting hole 12, lower shielding body 2, second positioning step
21, housing 20, internal filling structure 40, driving component 3, shielding space 4, fixed end mounting bracket 31, mobile end mounting bracket 32, driving member 33, telescopic rod 34, position sensor 35, limit assembly 50, limit rod 51, limit block 52,
Cyclotron 300,
Magnet system 60, upper iron yoke cover plate 61, lower iron yoke cover plate 62, iron yoke waist 63, upper magnet coil
64, lower magnet coil 65, cyclotron acceleration chamber 66,
Ion source system 71, radio frequency system 72, stripping extraction system 73, beam measurement system 74, target system
75. Lifting system 76. Vacuum system 77.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

The following describes a radiation protection shielding device 100 according to an embodiment of the present invention with reference to Figures 1 to 6. The radiation protection shielding device 100 is used for a cyclotron 300. The radiation protection shielding device 100 includes an upper shielding body 1, a lower shielding body 2 and a driving assembly 3. The upper shielding body 1 and the lower shielding body 2 define a sealed shielding space 4. The cyclotron 300 is located in the shielding space 4. The driving assembly 3 is used to drive the upper shielding body 1 and/or the lower shielding body 2 to move in the up and down directions to open or close the shielding space 4.

With specific reference to the examples shown in FIGS. 1 and 2 , the drive assembly 3 can drive the upper shielding body 1 to move upward to open or close the shielding space 4. When the shielding space 4 is opened, the cyclotron 300 in the shielding space 4 can be repaired and maintained; the drive assembly 3 can drive the upper shielding body 1 to move downward to close the shielding space 4. At this time, the cyclotron 300 performs cyclotron acceleration on the particle beam, and then allows the accelerated particle beam to bombard the target system to produce isotopes. The closed shielding space 4 constructed by the upper shielding body 1 and the lower shielding body 2 can better meet the requirements of the cyclotron 300 for ionizing radiation shielding.

In other examples of the present application, the driving component 3 of the present application can also drive the lower shielding body 2 to move in the up and down directions to open or close the shielding space 4, or the driving component 3 simultaneously drives the upper shielding body 1 and the lower shielding body 2 to move in the up and down directions to open or close the shielding space 4, which will not be repeated here.

In addition, in the present application, since the upper shielding body 1 or the lower shielding body 2 moves in the up and down direction, compared with the shielding device 100 in the related art, a shielding body that slides relatively on the ground is often designed, and the shielding device 100 occupies a larger area, the radiation protection shielding device 100 of the present application occupies a smaller area, which can be beneficial for installing the radiation protection shielding device 100 and the cyclotron 300 in the radiation protection shielding device 100 in a smaller space. In a specific example, the layout of medical equipment in a medical institution or hospital is tight, and the radiation protection shielding device 100 of the present application occupies a smaller area, which can save equipment installation space in the medical institution or hospital, so that the medical institution or hospital can produce the isotope fluorine-18 for medical use, thereby reducing the production cost of the isotope and improving the utilization rate of the isotope.

In some embodiments of the present invention, the upper shielding body 1 and the lower shielding body 2 both include an outer shell 20, an intermediate layer and an internal filling structure 40, the outer shell 20 has a filling cavity, the intermediate layer and the internal filling structure 40 are both located in the filling cavity, and the intermediate layer is located between the outer shell 20 and the internal filling structure 40 to separate the outer shell 20 and the internal filling structure 40, wherein the outer shell 20 is made of metal material, the intermediate layer is a lead shielding layer, and the internal filling structure 40 includes boron-containing concrete and polyethylene.

As shown in FIG. 2 , the upper shielding body 1 and the lower shielding body 2 are both surrounded by an outer shell 20, which has a good enclosure effect on the built-in materials of the shielding body. The outer shell 20 is made of metal material, which greatly improves the firmness of the outer shell 20 and is not easily affected by external forces to cause deformation of the outer shell 20, so that the radiation protection shielding device 100 can be more stable. Moreover, the outer shell 20 made of metal material can change its appearance shape relatively easily. Therefore, the shape of the outer shell 20 can be designed according to actual needs, with good flexibility.

Furthermore, the outer shell 20 has a filling cavity, and the middle layer and the internal filling structure 40 can be filled in the filling cavity. The internal filling structure 40 includes boron-containing concrete and polyethylene, which is adjacent to the cyclotron 300 and can directly and effectively shield the radiation generated during the operation of the cyclotron 300; the middle layer is a lead shielding layer, which is located between the outer shell 20 and the internal filling structure 40, and can further effectively shield the radiation generated during the operation of the cyclotron 300, thereby improving the production efficiency of isotopes.

In some embodiments of the present invention, the lower shielding body 2 is mounted on the ground, and the driving assembly 3 is mounted on the lower shielding body 2 or on the ground. The driving assembly 3 is used to drive the upper shielding body 1 to move in the up-down direction. Referring to FIG. 3 , the lower end of the driving assembly 3 is mounted on the lower shielding body 2, and the upper end is mounted on the upper shielding body 1. Of course, it can be understood that the lower end of the driving assembly 3 can also be mounted on the ground. Thus, the driving assembly 3 drives the upper shielding body 1 to move in the up-down direction to open or close the shielding space 4, so as to operate the cyclotron 300 or perform maintenance and repair on it, using the vertical The radiation shielding device 100 is oriented toward the space, thereby reducing the occupation of the lateral space and lowering the requirements for the use location of the radiation protection shielding device 100.

Further, the driving assembly 3 includes a fixed end mounting bracket 31, the fixed end mounting bracket 31 is fixed on the lower shielding body 2 or installed on the ground; the mobile end mounting bracket 32 is fixed on the upper shielding body 1; the driving member 33 is installed on the fixed end mounting bracket 31; the telescopic rod 34 is connected between the fixed end mounting bracket 31 and the mobile end mounting bracket 32, and the driving member 33 is suitable for driving the telescopic rod 34 to telescope. As shown in FIG. 1, the fixed end mounting bracket 31 is fixedly mounted on the lower shielding body 2 or the ground, the mobile end mounting bracket 32 is fixed on the upper shielding body 1, and the driving member 33 installed on the fixed end mounting bracket 31 drives the telescopic rod 34 to telescope, thereby driving the mobile end mounting bracket 32, and finally driving the upper shielding body 1 to move in the up and down directions, and the fixed end mounting bracket 31 keeps its position unchanged, thereby improving the stability of the radiation protection shielding device 100 during operation.

Furthermore, the driving member 33 is a hydraulic cylinder, which has a simple structure and a small size, can better realize reciprocating motion, has no transmission gap, and moves smoothly, which can better improve the stability of the upper shielding body 1 during the rising or falling process, and can effectively extend the service life of the radiation protection shielding device 100 and reduce the use cost of the equipment.

Furthermore, the driving assembly 3 further includes a limiting assembly 50, and the limiting assembly 50 includes a limiting rod 51 and a limiting block 52, one of the limiting rod 51 and the limiting block 52 is mounted on the fixed end mounting bracket 31, and the other of the limiting rod 51 and the limiting block 52 is mounted on the movable end mounting bracket 32. In a specific example, when the radiation protection shielding device 100 is in a closed state, the limiting rod 51 is inserted into the limiting block 52, and the upper shielding body 1 and the lower shielding body 2 are closely connected and enter a fixed state. Even if the cyclotron 300 vibrates during operation and has a tendency to move, the cyclotron 300 can be well limited. position, so that it is stably in the radiation protection shielding device 100, reducing the interference with the isotope production process, which can better improve the production efficiency of isotopes and effectively reduce the production cost of isotopes; when the radiation protection shielding device 100 begins to open, the upper shielding body 1 begins to rise in the upward direction, and the limiting rod 51 and the limiting block 52 begin to separate, until the radiation protection shielding device 100 is completely in the open state, the limiting rod 51 and the limiting block 52 are completely separated, and the cyclotron 300 can be maintained and serviced, and the limiting assembly 50 has a simple structure and low cost.

Furthermore, the driving component 3 also includes a limit component 50, and the limit component 50 includes a position sensor 35. The driving member 33 drives the upper shielding body 1 to move in the downward direction, the limit rod 51 and the limit block 52 begin to engage, and the position sensor 35 begins to receive signals and engages to a preset depth. When the radiation protection shielding device 100 is completely closed, the position sensor 35 feeds back information to control the driving member 33 to stop driving. The position sensor 35 greatly improves the sealing of the radiation protection shielding device 100, better shields radiation, and further improves the isotope production efficiency.

In some embodiments of the present invention, the cyclotron 300 is installed on the ground, the shielding space 4 has a downward opening, and the radiation protection shielding device 100 is used to cover the cyclotron 300 in the shielding space 4. The area occupied by the cyclotron 300 is completely covered by the radiation protection shielding device 100, which reduces the overall land area of the equipment and does not require an independent medical production site, greatly reducing the use cost of the equipment; the cyclotron 300 is covered in the shielding space 4, the shielding space 4 is completely sealed, better shielding radiation, and further improving the isotope production efficiency.

In some embodiments of the present invention, a lifting structure is provided on the top of the upper shielding body 1, and the lifting structure is a lifting hole 12 or a lifting ring, which exerts an upward pulling force on the upper shielding body 1, and can share the supporting force of the driving assembly 3 on the upper shielding body 1, and can enhance the control of the pressure of the upper shielding body 1 on the lower shielding body 2. The support force of the driving assembly 3 on the upper shielding body 1 is reduced, thereby extending the service life of the driving assembly 3 and reducing the use cost of the radiation protection shielding device 100.

In some embodiments of the present invention, as shown in FIG. 2 , the upper shielding body 1 has a first positioning portion, and the lower shielding body 2 has a second positioning portion. The first positioning portion and the second positioning portion are constructed as a first positioning step 11 and a second positioning step 21 that cooperate with each other. As shown in FIG. 2 , the first positioning portion is in a downwardly protruding shape to construct the first positioning step 11, and the second positioning portion is in a downwardly recessed shape to construct the second positioning step 21. The two forms can be completely matched, which can improve the accuracy of positioning, improve the sealing of the radiation protection shielding device 100, better shield radiation, and improve the isotope production efficiency.

Referring to Figure 1, the radiation protection shielding device 100 has a shielding space 4, and the cyclotron 300 is located in the shielding space 4, wherein the cyclotron 300 is used to produce radioactive isotopes, and is fixedly connected to the ground as a whole to increase its stability so that it can stably produce isotopes; the radiation protection shielding device 100 is divided into two parts, wherein the lower shielding body 2 is set on the ground, and the upper shielding body 1 can perform rising and falling movements to realize opening and closing functions, the purpose of the opening and closing function is to better perform maintenance work on the cyclotron 300, and the purpose of the closing function is to better shield radiation and reduce the interference of radiation on the cyclotron 300.

As shown in FIGS. 1 to 6 , a cyclotron 300 according to an embodiment of the present invention includes a magnet system 60, an ion source system 71, a radio frequency system 72, a stripping extraction system 73, a beam measurement system 74, a target system 75, a lifting system 76 and a vacuum system 77. The magnet system 60 includes an upper iron yoke cover plate 61, a lower iron yoke cover plate 62, an iron yoke waist 63, an upper magnet coil 64, a lower magnet coil 65, and a magnetic pole group. The magnetic pole group includes an upper fan-shaped magnetic pole and a lower fan-shaped magnetic pole (not shown in the figure). The iron yoke waist 63 is arranged between the upper iron yoke cover plate 61 and the lower iron yoke cover plate 62, and forms a cyclotron acceleration chamber 66 with the upper iron yoke cover plate 61 and the lower iron yoke cover plate 62. The source system 71 is used to provide a particle beam toward the cyclotron acceleration chamber 66, and the vacuum system 77 is used to evacuate the cyclotron acceleration chamber 66. The two ends of the lifting system 76 are respectively connected to the upper iron yoke cover plate 61 and the iron yoke waist 63. The upper iron yoke cover plate 61 is provided with an upper magnet coil 64, and the lower iron yoke cover plate 62 is provided with a lower magnet coil 65. The lower side surface of the upper iron yoke cover plate 61 is installed with an upper fan-shaped magnetic pole, and the upper side surface of the lower iron yoke cover plate 62 is installed with a lower fan-shaped magnetic pole, and the upper fan-shaped magnetic pole and the lower fan-shaped magnetic pole are opposite to each other up and down.

Specific reference is made to FIGS. 3 and 5 , in which the upper iron yoke cover plate 61 is arranged above the lower iron yoke cover plate 62, and the iron yoke waist 63 is arranged between the upper iron yoke cover plate 61 and the lower iron yoke cover plate 62, thereby, the upper iron yoke cover plate 61, the lower iron yoke cover plate 62 and the iron yoke waist 63 define a cyclotron acceleration chamber 66, and the cyclotron acceleration chamber 66 has a midplane X, and the upper iron yoke cover plate 61 and the lower iron yoke cover plate 62 are symmetrical along the midplane X, the upper magnet coil 64 is arranged in the upper iron yoke cover plate 61, and the lower magnet coil 65 is arranged in the lower iron yoke cover plate 62, and the upper magnet coil 64 and the lower magnet coil 65 are arranged along the midplane The upper fan-shaped magnetic pole is arranged on the lower side surface of the upper iron yoke cover plate 61, and the lower fan-shaped magnetic pole is arranged on the upper side surface of the lower iron yoke cover plate 62. The upper fan-shaped magnetic pole and the lower fan-shaped magnetic pole are symmetrical along the midplane X. Therefore, when the upper magnet coil 64 and the lower magnet coil 65 are energized, the upper iron yoke cover plate 61, the lower iron yoke cover plate 62 and the iron yoke waist 63 can be magnetized, and then the upper fan-shaped magnetic pole and the lower fan-shaped magnetic pole are matched, which is conducive to constructing a stable magnetic field environment. When the ion source system 71 emits a particle beam toward the cyclotron acceleration chamber 66, the particle beam can be better accelerated in the cyclotron acceleration chamber 66.

Furthermore, the radio frequency system 72, the stripping lead-out system 73, the beam measuring system 74 and the target system 75 are all installed on the iron yoke waist 63. Therefore, through the reasonable type of the upper iron yoke cover plate 61, the lower iron yoke cover plate 62 and the iron yoke waist 63, it is convenient to assemble the radio frequency system 72, the stripping lead-out system 73, the beam measuring system 74 and the target system 75, reduce the difficulty of assembly, and thus reduce the production cost. In addition, the assembly position of the radio frequency system 72, the stripping lead-out system 73, the beam measuring system 74 and the target system 75 is integrated on the iron yoke waist 63, which is convenient to optimize the radio frequency system 72, the stripping lead-out system 73, the beam measuring system 74 and the target system 75. layout, thereby reducing the volume of the cyclotron 300 to a certain extent. In addition, in the present application, the iron yoke waist 63 is located between the upper iron yoke cover plate 61 and the lower iron yoke cover plate 62, so that the assembly gap between the upper iron yoke cover plate 61 and the iron yoke waist 63, and the assembly gap between the lower iron yoke cover plate 62 and the iron yoke waist 63 can be better sealed respectively. Compared with the related technology of directly making the two iron yoke cover plates cooperate to construct the cyclotron acceleration chamber 66, the sealing difficulty of the cyclotron acceleration chamber 66 can be reduced. Moreover, the upper iron yoke cover plate 61 and the lower iron yoke cover plate 62 of the present application do not need to construct a subspace of the spliced cyclotron acceleration chamber 66, which can reduce the processing difficulty of the upper iron yoke cover plate 61 and the lower iron yoke cover plate 62, thereby further reducing the production cost.

Therefore, according to the cyclotron 300 of the embodiment of the present invention, the radio frequency system 72, the stripping extraction system 73, the beam measurement system 74 and the target system 75 can be integrated and assembled on the iron yoke waist 63 through the reasonable division of the upper iron yoke cover plate 61, the lower iron yoke cover plate 62 and the iron yoke waist 63, which is beneficial to optimize the structural layout of the cyclotron 300, thereby helping to reduce the volume of the cyclotron 300, and, by making the upper iron yoke cover plate 61, the lower iron yoke cover plate 62 and the iron yoke waist 63 jointly construct the cyclotron acceleration chamber 66, the sealing difficulty of the cyclotron acceleration chamber 66 can be reduced, and the processing difficulty of the upper iron yoke cover plate 61 and the lower iron yoke cover plate 62 and the size of the blanks of the upper iron yoke cover plate 61 and the lower iron yoke cover plate 62 can be reduced, thereby further reducing the production cost.

Furthermore, by using the radiation protection shielding device 100 of the above-mentioned embodiment of the present application, not only can the cyclotron 300 be better shielded from radiation, but the cyclotron 300 and the radiation protection shielding device 100 can also have a smaller footprint after being combined, which is conducive to miniaturized design and can meet the requirements of layout in medical institutions, thereby enabling medical isotopes to be efficiently produced in medical structures, thereby reducing isotope production costs and improving isotope utilization.

In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims (9)

1. A radiation protection shielding device for a cyclotron accelerator, characterized in that it comprises: an upper shielding body, a lower shielding body and a driving assembly, wherein the upper shielding body and the lower shielding body define a sealed shielding space, the cyclotron accelerator is located in the shielding space, and the driving assembly is used to drive the upper shielding body to move in the up and down directions to open or close the shielding space, wherein:

   The lower shielding body is installed on the ground, the driving assembly is installed on the lower shielding body or on the ground, and the driving assembly is used to drive the upper shielding body to move in the up and down directions.

   The drive assembly comprises:

   A fixed end mounting bracket, wherein the fixed end mounting bracket is fixed on the lower shielding body or installed on the ground;

   A mobile end mounting bracket, wherein the mobile end mounting bracket is fixed on the upper shielding body;

   A driving member, the driving member being mounted on the fixed end mounting bracket;

   A telescopic rod is connected between the fixed end mounting bracket and the movable end mounting bracket, and the driving member is suitable for driving the telescopic rod to perform telescopic action.
2. The radiation protection shielding device according to claim 1 is characterized in that the upper shielding body and the lower shielding body each include an outer shell, an intermediate layer and an internal filling structure, the outer shell has a filling cavity, the intermediate layer and the internal filling structure are both located in the filling cavity, the intermediate layer is located between the outer shell and the internal filling structure to separate the outer shell and the internal filling structure, wherein the outer shell is made of metal material, the intermediate layer is a lead shielding layer, and the internal filling structure includes boron-containing concrete and polyethylene.
3. The radiation protection shielding device according to claim 1 is characterized in that the driving member is a hydraulic cylinder.
4. The radiation protection shielding device according to claim 1, characterized in that the drive component It also includes a limiting assembly, which includes: a limiting rod and a limiting block, one of the limiting rod and the limiting block is installed on the fixed end mounting bracket, and the other of the limiting rod and the limiting block is installed on the movable end mounting bracket.
5. The radiation protection shielding device according to claim 1 is characterized in that the driving component also includes a limit component, and the limit component includes: a position sensor.
6. The radiation protection shielding device according to claim 1 is characterized in that the cyclotron is installed on the ground, the shielding space has a downward opening, and the radiation protection shielding device is used to cover the cyclotron in the shielding space.
7. The radiation protection shielding device according to claim 1 is characterized in that a lifting structure is provided on the top of the upper shielding body, and the lifting structure is a lifting hole or a lifting ring.
8. The radiation protection shielding device according to claim 1 is characterized in that the upper shielding body has a first positioning portion, the lower shielding body has a second positioning portion, and the first positioning portion and the second positioning portion are constructed as a first positioning step and a second positioning step that cooperate with each other.
9. A cyclotron using the radiation protection shielding device according to any one of claims 1 to 8, characterized in that the cyclotron is located in the shielding space, and comprises:

   Magnet system, ion source system, radio frequency system, stripping extraction system, beam measurement system, target system, lifting system and vacuum system,

   The magnet system includes an upper iron yoke cover plate, a lower iron yoke cover plate, an iron yoke waist, an upper magnet coil, a lower magnet coil, and a magnetic pole group. The magnetic pole group includes an upper fan-shaped magnetic pole and a lower fan-shaped magnetic pole. The iron yoke waist is arranged between the upper iron yoke cover plate and the lower iron yoke cover plate, and forms a cyclotron acceleration chamber with the upper iron yoke cover plate and the lower iron yoke cover plate. The ion source system is used to provide a particle beam toward the cyclotron acceleration chamber. The vacuum system is used to evacuate the cyclotron acceleration chamber. The two ends of the lifting system are used to evacuate the cyclotron acceleration chamber. The ends are respectively connected to the upper iron yoke cover plate and the iron yoke waist,

   The upper magnet coil is arranged in the upper iron yoke cover plate, the lower magnet coil is arranged in the lower iron yoke cover plate, the upper fan-shaped magnetic pole is installed on the lower side of the upper iron yoke cover plate, the lower fan-shaped magnetic pole is installed on the upper side of the lower iron yoke cover plate, and the upper fan-shaped magnetic pole and the lower fan-shaped magnetic pole are opposite to each other up and down, wherein,

   The radio frequency system, the stripping and extraction system, the beam measurement system and the target system are all installed on the iron yoke waist.