CN115460758A - Radiation protection shielding device and cyclotron using same - Google Patents

Abstract

The invention discloses a radiation protection shielding device and a cyclotron using the same. According to the radiation protection shielding device provided by the embodiment of the invention, the floor space of equipment is reduced, and the facility can be arranged in a hospital, so that the isotope production cost is greatly reduced, and the isotope utilization efficiency is improved.

Description

Radiation protection shielding device and cyclotron using same

Technical Field

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

Background

At present, a cyclotron for producing radioactive isotopes has a complex structure and large floor area, and needs to be equipped with an independent medical production site, and the utilization rate of isotope drugs becomes very low due to short half-life period of the isotopes, so that the requirements of medical institutions and hospitals cannot be met.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a radiation protection shielding device, which not only can better perform radiation shielding on a cyclotron, but also has a smaller floor area, is beneficial to miniaturization design, and can meet the requirement for arrangement 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.

The radiation protection shielding device 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 is positioned in the shielding space, and the driving assembly is used for driving the upper shielding body and/or the lower shielding body to move in the up-and-down direction so as to open or close the shielding space.

According to the radiation protection shielding device provided by the embodiment of the invention, the upper shielding body and the lower shielding body are arranged to define the sealed shielding space, the cyclotron is positioned in the sealed shielding space, the upper shielding body only moves up and down to open the shielding space, the occupied area of equipment can be effectively reduced, the using place of the equipment is more flexible, an independent production field is not required to be equipped, the requirement of arrangement in a medical institution can be met, and further the medical isotope can be efficiently produced in the medical institution, so that the isotope production cost can be reduced, and the isotope utilization rate can be improved; through setting up drive assembly, the shielding body moves along the top direction in the drive, opens the shielding space, is convenient for maintain the maintenance equipment, extension equipment service life, and the shielding body moves along the direction down in the drive, closes the shielding space to shielding radiation improves cyclotron's operating efficiency, improves the isotope utilization efficiency simultaneously.

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 invention, the upper shield and the lower shield each comprise an outer shell having a filling cavity, an intermediate layer and an internal filling structure, the intermediate layer and the internal filling structure each being located within the filling cavity, the intermediate layer being located between the outer shell and the internal filling structure for spacing the outer shell and the internal filling structure apart, wherein the outer shell is composed of a metallic material, the intermediate layer is a lead shielding layer, and the internal filling structure comprises boron-containing concrete and polyethylene.

In some embodiments of the present invention, the lower shield is installed on the ground, and the driving assembly is installed on the lower shield or on the ground, and is used for driving the upper shield to move in the up-and-down direction.

In some embodiments of the invention, the drive assembly comprises a fixed end mounting bracket fixed to the lower shield or mounted to the ground; the movable end mounting bracket is fixed on the upper shielding body; the driving piece is arranged on the fixed end mounting bracket; the telescopic link, the telescopic link is connected the stiff end installing support with remove between the end installing support, the driving piece is suitable for the drive the flexible action of telescopic link.

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

In some embodiments of the invention, the drive assembly further comprises a limit assembly, the limit assembly comprising: the limiting rod and the 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.

In some embodiments of the invention, the drive assembly further comprises a limit assembly comprising a position sensor.

In some embodiments of the invention, the cyclotron is installed on the ground, the shielded space has a downward opening, and the radiation protection shield is used to house the cyclotron in the shielded space.

In some embodiments of the present invention, a hoisting structure is disposed on the top of the upper shield, and the hoisting structure is a hoisting hole or a hoisting ring.

In some embodiments of the present invention, the upper shield body has a first positioning portion, and the lower shield 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 are fitted to each other.

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

According to an embodiment of the invention, the cyclotron is located in the shielded space, the cyclotron comprising: magnet system, ion source system, radio frequency system, peel off and draw forth system, beam survey system, target system, operating system and vacuum system, magnet system includes upper yoke apron, lower yoke apron, yoke waist, goes up magnet coil, lower magnet coil, magnetic pole group includes fan-shaped magnetic pole and lower fan-shaped magnetic pole, the yoke waist sets up go up the yoke apron with down between the yoke apron, and with go up yoke apron with lower yoke apron constructs out the acceleration chamber that circles round, ion source system is used for the orientation it provides the particle beam to circle round the acceleration chamber, vacuum system is used for with it is vacuum-pumping to circle the acceleration chamber, operating system's both ends are connected respectively upper yoke apron with on the yoke waist, be provided with in the upper yoke apron go up magnet coil, be provided with in the lower yoke apron down magnet coil, the downside of upper yoke apron is installed go up fan-shaped magnetic pole, the side-mounting of lower yoke apron is down fan-shaped magnetic pole, go up the fan-shaped magnetic pole with lower fan-shaped magnetic pole is relative from top to bottom, wherein, the radio frequency system peel off and draw forth the beam survey system all install the yoke survey the yoke system.

According to the cyclotron provided by the embodiment of the invention, the integrated radio frequency system, the stripping lead-out system, the beam measuring system and the target system can be integrally assembled on the iron yoke waist through reasonable parting of the upper iron yoke cover plate, the lower iron yoke cover plate and the iron yoke waist, so that the structural layout of the cyclotron is favorably optimized, the size of the cyclotron is favorably reduced, the cyclotron cavity is formed by the upper iron yoke cover plate, the lower iron yoke cover plate and the iron yoke waist together, the sealing difficulty of the cyclotron cavity can be reduced, the processing difficulty of the upper iron yoke cover plate and the lower iron yoke cover plate and the size of blanks can be reduced, and the production cost is further reduced. And further through using the radiation protection shield assembly of this application above-mentioned embodiment, not only can carry out radiation shielding to the cyclotron betterly, still make have less area behind cyclotron and the combination of radiation protection shield assembly, be favorable to miniaturized design, can satisfy the demand of arranging in medical institution, and then can high-efficiently produce medical isotope in making the medical structure to can reduce isotope manufacturing cost, promote the isotope utilization ratio.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

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

fig. 1 is a schematic view of a radiation protection shield and a cyclotron in cooperation according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a radiation protective shield according to an embodiment of the present invention.

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

Figure 4 is a front view of a stop 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.

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

Reference numerals:

a radiation protection shield 100,

An upper shield 1, a first positioning step 11, a hoisting hole 12, a lower shield 2, a second positioning step 21, a shell 20, an internal filling structure 40, a driving component 3, a shielding space 4 a fixed end mounting bracket 31, a moving end mounting bracket 32, a driving piece 33, a telescopic rod 34, a position sensor 35, a limiting component 50, a limiting rod 51, a limiting block 52, a positioning rod,

A cyclotron 300,

A magnet system 60, an upper yoke cover 61, a lower yoke cover 62, a yoke waist 63, an upper magnet coil 64, a lower magnet coil 65, a cyclotron cavity 66,

An ion source system 71, a radio frequency system 72, a stripping extraction system 73, a beam measuring system 74, a target system 75, a lifting system 76 and a vacuum system 77.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The radiation protection shield 100 according to the embodiment of the present invention is described below with reference to fig. 1 to 6, and is used for a cyclotron 300, the radiation protection shield 100 includes 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 shielded space 4, the cyclotron 300 is located in the shielded space 4, and the driving assembly 3 is used for driving the upper shield 1 and/or the lower shield 2 to move in the up-and-down direction to open or close the shielded space 4.

Referring specifically to the example shown in fig. 1 and fig. 2, the driving assembly 3 may drive the upper shielding body 1 to move upward to open or close the shielding space 4, and when the shielding space 4 is opened, the cyclotron 300 in the shielding space 4 may be repaired or maintained; the driving assembly 3 can drive the upper shielding body 1 to move downwards to close the shielding space 4, at this time, the cyclotron 300 performs cyclotron acceleration on the particle beam, and then the accelerated particle beam bombards the target system to produce isotopes, and the closed shielding space 4 formed by the upper shielding body 1 and the lower shielding body 2 can better meet the requirements of the cyclotron 300 on shielding of ionizing radiation.

In other examples of the present application, the driving assembly 3 of the present application may further drive the lower shielding body 2 to move in the up-down direction so as to open or close the shielding space 4, or the driving assembly 3 drives the upper shielding body 1 and the lower shielding body 2 to move in the up-down direction simultaneously so as to open or close the shielding space 4, which is not described herein again.

In addition, in the present application, since the upper shield 1 or the lower shield 2 is movable in the up-down direction, compared to the shield 100 in the related art, the shield that slides relatively on the ground is often designed, the occupied area of the shield 100 is large, the occupied area of the radiation protection shield 100 in the present application is small, and it is advantageous to install the radiation protection shield 100 and the cyclotron 300 in the radiation protection shield 100 at a position where the space is small, in a specific example, the layout of medical equipment in a medical institution or a hospital is tight, and the occupied area of the radiation protection shield 100 in the present application is small, so that the equipment installation space in the medical institution or the hospital can be saved, so that the medical isotope fluorine-18 can be produced in the medical institution or the hospital, the production cost of the isotope is reduced, and the utilization rate of the isotope is improved.

In some embodiments of the present invention, the upper shield 1 and the lower shield 2 each comprise an outer shell 20, an intermediate layer and an inner filling structure 40, the outer shell 20 having a filling cavity, the intermediate layer and the inner filling structure 40 each being located within the filling cavity, the intermediate layer being located between the outer shell 20 and the inner filling structure 40 for spacing the outer shell 20 and the inner filling structure 40 apart, wherein the outer shell 20 is composed of a metal material, the intermediate layer is a lead shielding layer, and the inner filling structure 40 comprises boron-containing concrete and polyethylene.

Referring to fig. 2, the upper shield 1 and the lower shield 2 are surrounded by the housing 20, which has a good surrounding effect on the built-in material of the shields, the housing 20 is made of metal material, which greatly improves the firmness of the housing 20, and is not easy to deform the housing 20 due to external force, so that the radiation protection shielding device 100 is more stable, and the housing 20 made of metal material can change its appearance and shape easily, therefore, the shape of the housing 20 can be designed according to actual requirements, and the flexibility is good.

Further, the housing 20 has a filling cavity in which the intermediate layer and the internal filling structure 40 can be filled, and the internal filling structure 40 comprises 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, and is located between the shell 20 and the internal filling structure 40, so that radiation generated in the operation process of the cyclotron 300 can be effectively further shielded, and the production efficiency of isotopes is improved.

In some embodiments of the present invention, the lower shield 2 is installed on the ground, the driving assembly 3 is installed on the lower shield 2 or on the ground, and the driving assembly 3 is used for driving the upper shield 1 to move in the up-and-down direction. Referring to fig. 3, the lower end of the driving assembly 3 is mounted on the lower shield 2 and the upper end is mounted on the upper shield 1, but it will be understood that the lower end of the driving assembly 3 may be mounted on the ground. Therefore, the driving assembly 3 drives the upper shield 1 to move up and down to open or close the shielding space 4, so that the cyclotron 300 is operated or maintained, a vertical space is utilized, occupation of a transverse space is reduced, and requirements of the radiation protection shielding device 100 on a use place are reduced.

Further, the driving assembly 3 includes a fixed end mounting bracket 31, and the fixed end mounting bracket 31 is fixed on the lower shield 2 or mounted on the ground; the moving end mounting bracket 32 is fixed on the upper shield 1; the driving member 33 is mounted on the fixed end mounting bracket 31; the telescopic rod 34 is connected between the fixed end mounting bracket 31 and the movable end mounting bracket 32, and the driving member 33 is adapted to drive the telescopic rod 34 to perform telescopic action. Referring to fig. 1, the fixed end mounting bracket 31 is fixedly mounted on the lower shield 2 or the ground, the movable end mounting bracket 32 is fixed on the upper shield 1, the driving member 33 mounted on the fixed end mounting bracket 31 drives the telescopic rod 34 to perform a telescopic action to drive the movable end mounting bracket 32, and finally the upper shield 1 is driven to move up and down, the fixed end mounting bracket 31 keeps the position unchanged, and the stability of the radiation protection shielding apparatus 100 in the operation process is improved.

Furthermore, the driving part 33 is a hydraulic cylinder, which has a simple structure and a small volume, can better realize reciprocating motion, has no transmission gap, moves stably, better promotes the stability of the upper shield 1 in the ascending or descending process, can effectively prolong the service life of the radiation protection shielding device 100, and reduces the use cost of the equipment.

Further, the driving assembly 3 further includes a limiting assembly 50, 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, the upper shielding body 1 is tightly connected with the lower shielding body 2, and the radiation protection shielding device enters a fixed state, so that even if the cyclotron 300 vibrates during operation to generate a displacement trend, the position of the cyclotron 300 can be well limited, the cyclotron can be stably positioned in the radiation protection shielding device 100, interference on an isotope production process is reduced, the isotope production efficiency can be better improved, and the isotope production cost is effectively reduced; when the radiation protection shielding device 100 starts to be opened, the upper shielding body 1 starts to rise along the upper direction, the limiting rod 51 and the limiting block 52 start to be separated, until the radiation protection shielding device 100 is completely in an opening state, the limiting rod 51 and the limiting block 52 are completely separated, the cyclotron 300 can be maintained, the limiting component 50 is simple in structure, and the cost is low.

Further, drive assembly 3 still includes spacing subassembly 50, spacing subassembly 50 includes position sensor 35, shield 1 is followed the activity of below orientation in the drive of driving piece 33, gag lever post 51 and stopper 52 begin the gomphosis, position sensor 35 begins the received signal, the gomphosis is to predetermineeing the degree of depth, when radiation protection shield assembly 100 was closed completely, position sensor 35 feedback information, stop driving with control driving piece 33, position sensor 35 has greatly promoted radiation protection shield assembly 100's leakproofness, shield the radiation better, isotope production efficiency has further been promoted.

In some embodiments of the present invention, the cyclotron 300 is installed on the ground, the shielding space 4 has a downward opening, the radiation protection shielding device 100 is used to cover the cyclotron 300 in the shielding space 4, the occupation area of the cyclotron 300 is completely covered by the radiation protection shielding device 100, the total occupation area of the equipment is reduced, an independent medical production site does not need to be equipped, and the use cost of the equipment is greatly reduced; the cyclotron 300 is covered in the shielding space 4, and the shielding space 4 is completely sealed, so that radiation is better shielded, and the isotope production efficiency is further improved.

In some embodiments of the present invention, the top of the upper shield 1 is provided with a hoisting structure, which is a hoisting hole 12 or a hoisting ring, and has an upward pulling force on the upper shield 1, so that the supporting force of the driving assembly 3 on the upper shield 1 can be shared, the control of the upper shield 1 on the pressure of the lower shield 2 can be enhanced, the supporting force of the driving assembly 3 on the upper shield 1 can be reduced, the service life of the driving assembly 3 can be prolonged, and the use cost of the radiation protection shielding apparatus 100 can be reduced.

In some embodiments of the present invention, referring to fig. 2, the upper shield 1 has a first positioning portion, the lower shield 2 has a second positioning portion, the first positioning portion and the second positioning portion are configured as a first positioning step 11 and a second positioning step 21 that are matched with each other, referring to fig. 2, the first positioning portion is in a downward protruding form to configure the first positioning step 11, and the second positioning portion is in a downward recessed form to configure the second positioning step 21, which can completely match each other, thereby improving the positioning accuracy, improving the sealing performance of the radiation protection shielding apparatus 100, shielding radiation better, and improving the isotope production efficiency.

Referring to fig. 1, the radiation protection shielding apparatus 100 has a shielding space 4, and a cyclotron 300 is located in the shielding space 4, wherein the cyclotron 300 is used for producing radioisotopes, and is integrally and fixedly connected to the ground to increase the stability thereof, so that the stable isotope production thereof is performed; the radiation protection shielding device 100 is divided into an upper part and a lower part, wherein the lower shielding body 2 is arranged on the ground, the upper shielding body 1 can move up and down to realize the opening and closing functions, the opening and closing functions are used for better maintaining the cyclotron 300, the closing function is used for better shielding radiation, and the interference of the radiation on the cyclotron 300 is reduced.

As shown in fig. 1 to 6, the cyclotron 300 according to the embodiment of the present invention includes a magnet system 60, an ion source system 71, a radio frequency system 72, a strip extraction system 73, a beam measurement system 74, a target system 75, an elevator system 76, and a vacuum system 77, wherein the magnet system 60 includes an upper yoke cover plate 61, a lower yoke cover plate 62, a yoke waist 63, an upper magnet coil 64, a lower magnet coil 65, and a magnetic pole group including upper and lower fan-shaped magnetic poles (not shown), the yoke waist 63 is disposed between the upper yoke cover plate 61 and the lower yoke cover plate 62 and forms a cyclotron cavity 66 with the upper yoke cover plate 61 and the lower yoke cover plate 62, the ion source system 71 is configured to supply a particle beam toward the cyclotron cavity 66, the vacuum system 77 is configured to evacuate the cyclotron cavity 66, two ends of the elevator system 76 are respectively connected to the upper yoke cover plate 61 and the lower yoke cover plate 63, an upper magnet coil 64 is disposed in the upper yoke cover plate 61, a lower magnet coil 65 is disposed in the lower yoke cover plate 62, a lower yoke cover plate 61 is mounted with a lower side of the upper yoke cover plate, a fan-shaped magnetic pole 62 is mounted with the upper yoke cover plate, and a lower yoke is mounted with the upper and the lower magnetic pole face of the lower yoke cover plate 62, and the lower magnetic pole faces of the lower yoke are opposite to the lower yoke.

With particular reference to fig. 3 and 5, the upper yoke cover plate 61 is disposed above the lower yoke cover plate 62, and the yoke waist 63 is disposed between the upper yoke cover plate 61 and the lower yoke cover plate 62, whereby the upper yoke cover plate 61, the lower yoke cover plate 62, and the yoke waist 63 define a cyclotron cavity 66, the cyclotron cavity 66 having a median plane X, the upper yoke cover plate 61 and the lower yoke cover plate 62 being symmetrical along the median plane X, the upper magnet coil 64 being disposed within the upper yoke cover plate 61, the lower magnet coil 65 being disposed within the lower yoke cover plate 62, the upper magnet coil 64 and the lower magnet coil 65 being symmetrical along the median plane X, the upper fan-shaped magnet being disposed on the lower side of the upper yoke cover plate 61, the lower fan-shaped magnet being disposed on the upper side of the lower yoke cover plate 62, the upper fan-shaped magnet and the lower fan-shaped magnet being symmetrical along the median plane X, whereby, when the upper magnet coil 64 and the lower magnet coil 65 are both energized, the upper magnet cover plate 61, the lower magnet coil 62 and the lower magnet coil 63 are then mated, the upper and lower fan-shaped magnet are preferably aligned with the magnetic field of the cyclotron cavity 66, thereby facilitating stable emission of the particle beam in the ion source, and facilitating a more stable emission of the ion beam.

Further, the radio frequency system 72, the peeling leading-out system 73, the beam measuring system 74 and the target system 75 are all installed on the yoke waist 63, so that the assembly of the radio frequency system 72, the peeling leading-out system 73, the beam measuring system 74 and the target system 75 can be facilitated through reasonable parting of the upper yoke cover plate 61, the lower yoke cover plate 62 and the yoke waist 63, the assembly difficulty is reduced, and the production cost is reduced, moreover, the assembly positions of the radio frequency system 72, the peeling leading-out system 73, the beam measuring system 74 and the target system 75 integrated on the yoke waist 63 can be facilitated to optimize the layout of the radio frequency system 72, the peeling leading-out system 73, the beam measuring system 74 and the target system 75, so that the volume of the cyclotron 300 is reduced to a certain extent, in addition, in this application, the yoke waist 63 is located between the upper yoke cover plate 61 and the lower yoke cover plate 62, so that the assembly gap between the upper yoke cover plate 61 and the yoke waist 63 and the assembly gap between the lower yoke cover plate 62 and the yoke waist 63 can be better sealed respectively, and compared with the prior art in which two yoke cover plates are directly matched to construct the convolution acceleration cavity 66, the sealing difficulty of the convolution acceleration cavity 66 can be reduced, and the upper yoke cover plate 61 and the lower yoke cover plate 62 of this application do not need to construct a subspace of the split convolution acceleration cavity 66, so that the processing difficulty of the upper yoke cover plate 61 and the lower yoke cover plate 62 can be reduced, thereby further reducing the production cost.

Therefore, according to the cyclotron 300 of the embodiment of the present invention, through the reasonable parting of the upper iron yoke cover plate 61, the lower iron yoke cover plate 62 and the iron yoke waist 63, the radio frequency system 72, the peeling extraction system 73, the beam measurement system 74 and the target system 75 can be integrally assembled on the iron yoke waist 63, which is beneficial to optimizing the structural layout of the cyclotron 300, thereby being beneficial to reducing the volume of the cyclotron 300, and further, through the upper iron yoke cover plate 61, the lower iron yoke cover plate 62 and the iron yoke waist 63 together constructing the cyclotron cavity 66, the sealing difficulty of the cyclotron cavity 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.

And further through using the radiation protection shielding device 100 of this application above-mentioned embodiment, not only can carry out radiation shielding to cyclotron 300 better, still make and have less area after cyclotron 300 and radiation protection shielding device 100 make up, be favorable to miniaturized design, can satisfy the demand of arranging in medical institution, and then can high-efficiently produce medical isotope in making the medical structure to can reduce isotope manufacturing cost, promote the isotope utilization ratio.

In the description herein, references to the description of the terms "some embodiments," "optionally," "further," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A radiation-shielding shield for a cyclotron, comprising: go up the shield, shield and drive assembly down, go up the shield with the sealed shielded space is injectd to the shield down, the cyclotron is located in the shielded space, drive assembly is used for the drive go up the shield and/or the shield is along upper and lower direction activity down, in order to open or close the shielded space.

2. The radiation-shielding shield of claim 1 wherein the upper shield and the lower shield each comprise an outer shell having a fill cavity, an intermediate layer and an inner fill structure, the intermediate layer and the inner fill structure each being located within the fill cavity, the intermediate layer being located between the outer shell and the inner fill structure for spacing the outer shell and the inner fill structure apart, wherein the outer shell is comprised of a metallic material, the intermediate layer is a lead shield, and the inner fill structure comprises boron-containing concrete and polyethylene.

3. The radiation-shielding apparatus of claim 1, wherein the lower shield is mounted on the ground, and the driving assembly is mounted on the lower shield or on the ground, and the driving assembly is configured to drive the upper shield to move in an up-and-down direction.

4. The radiation-shielding apparatus of claim 3, wherein the drive assembly comprises:

the fixed end mounting bracket is fixed on the lower shielding body or mounted on the ground;

the movable end mounting bracket is fixed on the upper shielding body;

the driving piece is arranged on the fixed end mounting bracket;

the telescopic link, the telescopic link is connected the stiff end installing support with remove between the end installing support, the driving piece is suitable for the drive the flexible action of telescopic link.

5. The radiation protection shield of claim 4 wherein said drive member is a hydraulic cylinder.

6. The radiation-shielding apparatus of claim 4, wherein the drive assembly further comprises a limit assembly, the limit assembly comprising: the limiting rod and the 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.

7. The radiation-shielding apparatus of claim 4, wherein the drive assembly further comprises a limit assembly, the limit assembly comprising: a position sensor.

8. The radiation protection shield of claim 3, wherein said cyclotron is mounted to said ground, said shielded space has a downward opening, and said radiation protection shield is configured to house said cyclotron within said shielded space.

9. The radiation protection shield assembly of claim 1, wherein a lifting structure is disposed on a top of the upper shield body, and the lifting structure is a lifting hole or a lifting ring.

10. The radiation-shielding shield assembly of claim 1 wherein said upper shield has a first detent and said lower shield has a second detent, said first detent and said second detent being configured as first and second cooperating detents.

11. A cyclotron using the radiation protection shield of any one of claims 1 to 10, wherein the cyclotron is located within the shielded space, the cyclotron comprising:

a magnet system, an ion source system, a radio frequency system, a stripping leading-out system, a beam measuring system, a target system, a lifting system and a vacuum system,

the magnet system comprises 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 comprises 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 cavity together with the upper iron yoke cover plate and the lower iron yoke cover plate, the ion source system is used for providing particle beams towards the cyclotron cavity, the vacuum system is used for vacuumizing the cyclotron cavity, two ends of the lifting system 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 arranged on the lower side surface of the upper iron yoke cover plate, the lower fan-shaped magnetic pole is arranged on the upper side surface of the lower iron yoke cover plate, 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 peeling leading-out system, the beam measuring system and the target system are all arranged on the yoke waist.

Images