CN219716487U

CN219716487U - Radiant energy spectrum shaping device

Info

Publication number: CN219716487U
Application number: CN202320380382.XU
Authority: CN
Inventors: 陈栩涵; 程叶; 黄瑞铭; 奚昂涛
Original assignee: Guangdong Zhongke Range Of Radiation Protection Technology Co ltd
Current assignee: Guangdong Zhongke Range Of Radiation Protection Technology Co ltd
Priority date: 2023-03-03
Filing date: 2023-03-03
Publication date: 2023-09-19
Anticipated expiration: 2033-03-03

Abstract

The utility model relates to the technical field of radiation energy spectrum shaping, in particular to a radiation energy spectrum shaping device, wherein a telescopic anti-tilting positioner is arranged in a shaping cavity of a shielding body, the anti-tilting positioner is arranged at the side of a part of shaping core body and is propped against the side surface of the shaping core body to position the shaping core body and prevent the shaping core body from tilting, and the anti-tilting positioner stretches to prop against the inner wall of the shaping cavity to be fixed with the shielding body, and contracts to be separated from contacting with the inner wall of the shaping cavity to be released from being fixed with the shielding body. Particularly, for the thin shaping core body easy to pour, the anti-tilting positioner can prevent the thin shaping core body from being poured in the shaping cavity; for thick shaping cores, an anti-roll positioner may also be used to position the shaping cavity.

Description

Radiant energy spectrum shaping device

Technical Field

The utility model relates to the technical field of radiant energy spectrum shaping, in particular to a radiant energy spectrum shaping device.

Background

With the development of atomic science, in order to reduce radiation damage to normal tissues around a tumor, the concept of target treatment in chemotherapy (chemotherapy) has been applied to radiation therapy; for tumor cells with high radiation resistance, radiation sources with high relative biological effects (relative biological effectiveness, RBE) such as proton therapy, heavy particle therapy, neutron capture therapy, etc. are also actively developed.

The radiation energy spectrum shaping device in the prior art comprises a shielding body which is horizontally arranged, a shaping cavity is arranged in the shielding body, at least one shaping core body used for energy spectrum shaping is arranged in the shaping cavity, a beam inlet and a beam outlet are respectively arranged at the front end and the rear end of the shielding body, the beam inlet and the beam outlet are communicated with the shaping cavity, a target material is arranged at the beam inlet, a detachable cover body is arranged at the beam outlet, a collimator is aligned to the cover body, and the shaping core body is arranged between the beam inlet and the beam outlet. The proton beam is accelerated by the accelerator, the proton beam is accelerated to energy enough to overcome the nuclear force of the target, nuclear reaction is carried out on the proton beam and the target to generate neutrons, electrons and protons, the generated neutrons, electrons and protons are decelerated to a preset energy spectrum by the shaping core body, are emitted to the beam outlet, and are irradiated to the irradiated body by the collimator.

However, the shaping core design of the prior art radiant energy spectrum shaping device is mostly of an integral fixed structure, and the energy spectrum intensity of the neutron/electron/proton beam output by the shaping core is always fixed, but the requirement on the energy spectrum intensity of the neutron/electron/proton beam is not uniform in the actual treatment process. The location, depth, and type of tumor may vary from patient to patient, which may result in different requirements for the spectral intensity of the proton/electron/proton beam during treatment. The beam energy spectrum emitted by the collimator can reach the preset energy spectrum intensity by adjusting the thickness and the number of the shaping cores in the shaping cavity because the shaping cores with different thicknesses have different deceleration capacities on the neutron/electron/proton beam. This may allow for a particular arrangement of shaping cores within the shaping cavity and the use of multiple shaping cores of different thicknesses, e.g., with some shaping cores in the shaping cavity being in contact arrangement and some shaping cores being in discrete arrangement. For thicker shaping cores, even if discretely arranged, the thickness and weight of the core itself can be positioned within the shaping cavity so as not to easily topple over; however, with thin shaping cores of relatively thin thickness, i.e. ones that are difficult to fix in the shaping cavity by their own thickness and weight, tilting can easily occur, thus affecting the intensity of the energy spectrum emitted by the device.

Disclosure of Invention

It is an object of the present utility model to provide a radiation energy spectrum shaping device that is capable of preventing a shaping core within a shaping cavity from tipping.

The utility model provides a radiation energy spectrum shaping device, which comprises a shielding body and at least one shaping core body for shaping a radiation energy spectrum, wherein a shaping cavity is arranged in the shielding body, and the shaping core body is arranged in the shaping cavity.

The anti-tilting positioner comprises two supporting plates, an adjusting mechanism is arranged between the two supporting plates, and the anti-tilting positioner can be stretched or contracted by adjusting the adjusting mechanism.

Wherein one ends of the two support plates are hinged, and the other ends of the two support plates can be close to or far away from each other around a hinge point by adjusting the adjusting mechanism so as to enable the anti-tilting positioner to extend or retract.

The anti-tilting positioner further comprises a compression spring arranged between the two support plates, and after the anti-tilting positioner stretches, the elastic force provided by the compression spring enables the two support plates to abut against the inner wall of the shaping cavity.

The adjusting mechanism comprises a screw rod and a sliding rail, the sliding rail is connected with two supporting plates in a sliding manner, the screw rod is connected with the two supporting plates, and the two supporting plates can be driven to slide along the sliding rail to be close to or far away from each other by rotating the screw rod.

The connecting block comprises a connecting block, strip-shaped connecting holes are respectively formed in two sides of the connecting block, a positioning pin is arranged at the hinged ends of the two supporting plates, the positioning pin can slide in the connecting holes, and the distance between the hinged ends of the two supporting plates is adjusted through the sliding position of the positioning pin in the connecting holes.

The rear end of the shielding body is provided with a detachable cover body, the radiation spectrum shaping device further comprises a filling mechanism, and the filling mechanism is arranged between the cover body and the adjacent shaping core body so as to fill a gap between the cover body and the adjacent shaping core body, and prevent the shaping core body from toppling towards one side of the cover body.

The filling mechanism comprises two filling plates, an elastic adjusting piece is arranged between the two filling plates, and the elastic adjusting piece provides elasticity to enable the two filling plates to be respectively abutted against the shaping core body and the cover body so as to prevent the shaping core body from tilting towards one side of the cover body.

Wherein, elastic adjustment piece has three, and circumference equiangular setting is equipped with a flexible guide bar between two filling plates respectively between the adjacent elastic adjustment piece.

The beneficial effects of the utility model are as follows: the shaping cavity of the shielding body is internally provided with a telescopic anti-tilting positioner, the anti-tilting positioner is arranged at the side of a part of shaping core body and props against the side surface of the shaping core body to position the shaping core body and prevent the shaping core body from tilting, and the anti-tilting positioner stretches to prop against the inner wall of the shaping cavity to be fixed with the shielding body and contracts to be separated from contact with the inner wall of the shaping cavity to be released from being fixed with the shielding body. Particularly, for the thin shaping core body easy to pour, the anti-tilting positioner can prevent the thin shaping core body from being poured in the shaping cavity; for thick shaping cores, an anti-roll positioner may also be used to position the shaping cavity.

Drawings

The utility model will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the utility model, and other drawings can be obtained by one of ordinary skill in the art without inventive effort from the following drawings.

Fig. 1 is a schematic structural view of a radiation energy spectrum shaping device of the present utility model.

Fig. 2 is a schematic structural diagram of an anti-tilting positioner according to a first embodiment of the present utility model.

Fig. 3 is a schematic structural diagram of an anti-tilting positioner according to a second embodiment of the present utility model.

Fig. 4 is a schematic structural view of the filling mechanism in the present utility model.

Fig. 1 to 4 include: 1. the device comprises a shielding body, 11, a beam inlet, 12, a beam outlet, 13, a cover body, 2, a shaping core body, 21, a thin shaping core body, 22, a thick shaping core body, 3, an anti-tilting positioner, 31, a supporting plate, 311, a positioning pin, 32, an adjusting mechanism, 321, an adjusting screw, 322, an adjusting nut, 33, a connecting block, 331, a connecting hole, 34, a compression spring, 35, a screw rod, 36, a sliding rail, 4, a filling mechanism, 41, a filling plate, 42, an elastic adjusting piece, 43 and a telescopic guide rod.

Detailed Description

The utility model will be described in detail with reference to specific examples.

As shown in fig. 1, the radiation spectrum shaping device includes a horizontally arranged shielding body 1, a shaping cavity is arranged in the shielding body 1, a beam inlet 11 and a beam outlet 12 are respectively arranged at the front end and the rear end of the shielding body 1, the beam inlet 11 and the beam outlet 12 are communicated with the shaping cavity, a target material is arranged at the beam inlet 11 or in front of the beam inlet, a detachable cover body 13 is arranged at the beam outlet 12 (i.e. the rear end of the shielding body 1), a collimator (not shown in the figure) is aligned with the cover body 13, and at least one shaping core body 2 for shaping the energy spectrum is arranged in the shaping cavity between the beam inlet 11 and the beam outlet 12.

[ embodiment one ]

The radiation spectrum shaping device comprises a telescopic anti-tilting positioner 3, wherein the anti-tilting positioner 3 is arranged at the side of a part of shaping core body 2 and is propped against the side surface of the shaping core body 2 to position the shaping core body 2 and prevent the shaping core body 2 from tilting, the anti-tilting positioner 3 stretches to prop against the inner wall of a shaping cavity to be fixed with the shielding body 1, and the anti-tilting positioner 3 contracts to be separated from contact with the inner wall of the shaping cavity to be released from the fixation with the shielding body 1. In particular, for a thin shaping core 21 that is easy to pour, the anti-tilt positioner 3 can prevent the thin shaping core 21 from pouring in the shaping chamber; for thick shaped cores 22, the anti-roll positioner 3 may also be used to position the core in the shaping chamber.

As shown in fig. 1, the shaping chamber shows shaping cores 2 in several different arrangements. A is a close contact arrangement of two thick shaping cores 22 and one thin shaping core 21, the left side wall of the thin shaping core 21 is close contact with the thick shaping core 22, and the right side wall of the thin shaping core 21 is a tilting surface, that is, the thin shaping core 21 is easy to tilt to the right side, at this time, the tilting surface of the thin shaping core 21 is abutted with the tilting prevention retainer 3, and the tilting prevention retainer 3 is extended to abut against the inner wall of the shaping cavity to be fixed with the shielding body 1, so that the thin shaping core 21 is positioned in the shaping cavity to prevent the tilting of the thin shaping core 21. B is a thin shaping core 21 separately disposed, and since the separately disposed thin shaping core 21 is easily tilted to the left or right, both the left and right side walls of the thin shaping core 21 are tilting surfaces, and at this time, the two tilting surfaces of the thin shaping core 21 are respectively abutted with one tilt-preventing retainer 3, and each tilt-preventing retainer 3 is stretched to abut against the inner wall of the shaping cavity to be fixed with the shield 1, thereby positioning the thin shaping core 21 in the shaping cavity to prevent the thin shaping core 21 from tilting. C is a thin shaping core 21 provided at the beam outlet 12, the left side wall of the thin shaping core 21 is a tilting surface, and at this time, the tilting surface of the thin shaping core 21 is abutted with the tilting prevention retainer 3, and the tilting prevention retainer 3 is stretched to abut against the inner wall of the shaping cavity to be fixed to the shield 1, thereby positioning the thin shaping core 21 in the shaping cavity to prevent the tilting of the thin shaping core 21. When it is desired to release the securing of the anti-tilt positioner 3 to the shield 1, the anti-tilt positioner 3 is operable to retract out of contact with the inner wall of the shaping chamber to release the securing to the shield 1. As shown in fig. 4, since a gap is left between the thin shaping core 21 and the cover 13, the radiation spectrum shaping device further includes a filling mechanism 4, and the filling mechanism 4 is disposed between the cover 13 and the shaping core 2 adjacent thereto to fill the gap therebetween, so as to prevent the shaping core 2 from tilting toward the cover 13. Specifically, the filling mechanism 4 includes two filling plates 41, and an elastic adjusting member 42 is disposed between the two filling plates 41, where the elastic adjusting member 42 provides an elastic force to make the two filling plates 41 abut against the thin shaping core 21 and the cover 13, respectively, so as to prevent the thin shaping core 21 from tilting toward the cover 13. Specifically, three elastic adjusting members 42 are circumferentially arranged between two filling plates 41 at equal angles, and a telescopic guide rod 43 is arranged between adjacent elastic adjusting members 42, so that the filling plates 41 can be better in filling abutting connection. The elastic adjusting member 42 may be composed of a telescopic guide rod 43 and a spring sleeved on the telescopic guide rod 43.

Of course, for thick shaped cores 22, anti-roll positioners 3 may also be used to position within the shaping cavity to prevent roll over.

In some embodiments, as shown in fig. 2, the anti-tilting positioner 3 includes two support plates 31, an adjusting mechanism 32 is disposed between the two support plates 31, and adjusting the adjusting mechanism 32 can enable the anti-tilting positioner 3 to extend or retract, that is, the abutting outer diameters of the two support plates 31 can be adjusted, and when the abutting outer diameters of the two support plates 31 are extended, the two support plates 31 abut against the inner wall of the shaping cavity, so as to be fixed in the shielding body 1; when the abutting outer diameters of the two support plates 31 are contracted, the two support plates 31 are separated from the inner wall of the shaping chamber, and can be taken out from the shield body 1.

In some embodiments, as shown in fig. 2, one end of the two support plates 31 is hinged by a connecting block 33, the other end of the two support plates is provided with an adjusting mechanism 32, the adjusting mechanism 32 comprises an adjusting screw 321 and an adjusting nut 322, and the other ends of the two support plates 31 can be close to or far from each other around a hinge point by rotating the adjusting nut 322, so that the anti-tilting positioner 3 can be extended or contracted. The forward rotation of the adjustment nut 322 increases the outer diameter of the abutment of the two support plates 31, and the reverse rotation of the adjustment nut 322 decreases the outer diameter of the abutment of the two support plates 31. After the anti-roll grip 3 is extended. In order to keep the two support plates 31 in an extended state all the time, the anti-roll positioner 3 further comprises a compression spring 34 arranged between the two support plates 31, the compression spring 34 providing an elastic force to press the two support plates 31 against the inner wall of the shaping chamber. Specifically, the two sides of the connecting block 33 are respectively provided with a strip-shaped connecting hole 331, the hinged ends of the two supporting plates 31 are respectively provided with a positioning pin, and the positioning pins can slide in the connecting holes, so that the upper end and the lower end of the two supporting plates 31 can be moved and adjusted in the left-right direction, the lower end (i.e. the hinged end) is passive, and the upper end (i.e. the end provided with the adjusting mechanism 32) is active. The forward rotation adjusting nut 322 increases the abutting outer diameter of the two support plates 31, and at the same time, the positioning pin 311 of the support plate 31 abuts against the outer side wall of the connecting hole 331 of the connecting block 33, so that the outer shape of the two support plates is more round, and the contact with the inner wall of the shaping cavity is more sufficient, thereby being more stable.

[ example two ]

As shown in fig. 3, the anti-tilting positioner 3 includes two support plates 31, an adjusting mechanism 32 is disposed between the two support plates 31, the adjusting mechanism 32 includes a screw rod 35 and a sliding rail 36, the sliding rail 36 is slidably connected with the two support plates 31, the screw rod 35 is connected with the two support plates 31, and the screw rod 35 can be rotated to drive the two support plates 31 to slide along the sliding rail 36 to approach or separate from each other. The screw rod 35 drives the two support plates 31 to slide away from each other along the slide rail 36 so as to abut against the inner wall of the shaping cavity 1, thereby being fixed in the shaping cavity 1; the screw rod 35 drives the two support plates 31 to slide along the sliding rail 36 towards each other so as to release the inner wall of the shaping chamber 1, and thus the two support plates can be taken out of the shaping chamber 1.

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the scope of the present utility model, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.

Claims

1. The shaping device comprises a shielding body and at least one shaping core body used for shaping the radiation energy spectrum, wherein a shaping cavity is formed in the shielding body, the shaping core body is arranged in the shaping cavity, and the shaping device is characterized by further comprising a telescopic anti-tilting positioner, wherein the anti-tilting positioner is arranged on the side of a part of the shaping core body and props against the side surface of the shaping core body to position the shaping core body and prevent the shaping core body from tilting, the anti-tilting positioner stretches to prop against the inner wall of the shaping cavity to be fixed with the shielding body, and the anti-tilting positioner contracts to be separated from the inner wall of the shaping cavity to release the fixation with the shielding body.

2. The radiant energy spectrum shaping device of claim 1, wherein the anti-tilt positioner comprises two support plates, and an adjustment mechanism is disposed between the two support plates, and the adjustment mechanism is adjusted to extend or retract the anti-tilt positioner.

3. The radiant energy spectrum shaping apparatus of claim 2, wherein one end of the two support plates is hinged and the adjustment mechanism is adapted to move the other end of the two support plates closer to or farther from each other about the hinge point to extend or retract the anti-tilt positioner.

4. A radiant energy spectrum shaping device as claimed in claim 3 wherein the anti-tilt positioner further comprises a compression spring disposed between the two support plates, the compression spring providing a spring force to urge the two support plates against the inner wall of the shaping chamber after the anti-tilt positioner is extended.

5. The radiant energy spectrum shaping device of claim 2, wherein the adjusting mechanism comprises a screw and a slide rail, the slide rail is slidably connected to the two support plates, the screw is connected to the two support plates, and rotation of the screw drives the two support plates to slide along the slide rail toward or away from each other.

6. A radiant energy spectrum shaping device according to claim 3, comprising a connecting block, wherein each of the two sides of the connecting block is provided with a strip-shaped connecting hole, each of the hinged ends of the two support plates is provided with a positioning pin, the positioning pin is slidable in the connecting hole, and the distance between the hinged ends of the two support plates is adjusted by the sliding position of the positioning pin in the connecting hole.

7. The radiant energy spectrum shaping device of claim 1, wherein the rear end of the shield is provided with a removable cover, the radiant energy spectrum shaping device further comprising a filling mechanism disposed between the cover and its adjacent shaping core to fill a gap therebetween to prevent the shaping core from tipping toward the cover side.

8. The radiant energy spectrum shaping device of claim 7, wherein the filling mechanism comprises two filling plates, an elastic adjusting member is arranged between the two filling plates, and the elastic adjusting member provides elastic force to enable the two filling plates to respectively abut against the shaping core body and the cover body so as to prevent the shaping core body from tilting towards one side of the cover body.

9. The radiant energy spectrum shaping device of claim 8, wherein the number of elastic adjusting members is three, each of which is circumferentially equiangularly disposed between two of the filler plates, and a telescoping guide rod is disposed between adjacent elastic adjusting members.