Multi-source irradiation device

Abstract

The utility model provides a multi-source irradiation device, which comprises a body with a through hole arranged inside, a first ray output port arranged on one side of the body and vertically communicated with the through hole, and a second ray output port arranged on the other side of the body, the radioactive source fixing column is provided with a plurality of radioactive sources at intervals, and the radioactive source fixing column is placed in the through hole and can move in the through hole; when one radioactive source moves to the corresponding first ray output port, the radioactive source emits rays through the first ray output port. According to the multi-source irradiation device provided by the utility model, an original rotating disc type source outlet structure is changed into a movable source outlet structure, and different radioactive sources are selected by moving the radioactive source fixing column, so that the problem that the rotating disc type structure generates a channel crossing ratio is solved.

Description

Technical Field

[0001] This utility model relates to the field of radiation source irradiation technology, and in particular to a multi-source irradiation device. Background Technology

[0002] Radiation irradiation devices are divided into single-source and multi-source devices. Currently, multi-source irradiation devices mainly consist of a collimation aperture system, a shutter system, a lead container, a radiation source mounting and positioning turntable, a transmission and positioning system, and a base. Four to five radiation sources can be mounted on the turntable, and these sources can be selected by the system's control computer software as needed. However, this turntable structure can lead to crosstalk issues. When multiple radiation sources with different nuclides and activities are placed on the same turntable, for example, when Cs-137 rays are needed (i.e., when the source rotates to the output port), Co-60 rays from a nearby location may also be emitted from the output port, resulting in crosstalk. Since Cs-137 and Co-60 rays have different energies, this can severely affect the calibration results of corresponding detection instruments. Furthermore, the turntable structure has a slow source emission time and low operating efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a multi-source irradiation device that replaces the original rotary source structure with a movable source structure. By moving the fixed column of the radiation source, different radiation sources can be selected, thus solving the problem of crosstalk ratio caused by the rotary structure.

[0004] To achieve the above objectives, this utility model provides a multi-source irradiation device, comprising: a body with a through hole inside, and a first ray output port on one side of the body, the first ray output port being perpendicularly connected to the through hole; a radiation source fixing column, on which multiple radiation sources are installed at intervals, the radiation source fixing column being placed in the through hole and movable within the through hole; when one of the radiation sources moves to the position corresponding to the first ray output port, the radiation source emits rays through the first ray output port.

[0005] Preferably, a scattering cavity is provided inside the body at the intersection of the first radiation output port and the through hole, and the scattering cavity is connected to the first radiation output port and the through hole; when one of the radiation sources on the radiation source fixing column moves into the scattering cavity, the radiation source emits radiation through the first radiation output port.

[0006] Preferably, a source plug is provided on the opposite side of each of the radiation sources relative to the first radiation output port.

[0007] Preferably, the source plug has threads on its outer periphery and blind holes on its inner side; a threaded hole is formed on the radiation source fixing post at a position corresponding to the source plug; the threads of the source plug are connected to the threaded hole of the radiation source fixing post.

[0008] Preferably, the scattering cavity is located at the center of the body.

[0009] Furthermore, the radiation source fixing column has a second radiation output port at the radiation emitting end of each radiation source, and the diameter of the radiation output end of the second radiation output port is the same as the diameter of the first radiation output port.

[0010] Preferably, the second ray outlet has a conical structure, and the inner diameter of the second ray outlet gradually increases along the direction in which the radiation source emits rays.

[0011] Furthermore, a step is provided between the emitting end of the radiation source and the input end of the second radiation output port to prevent the radiation source from escaping from the second radiation output port.

[0012] Preferably, the radiation source fixing column is a solid column.

[0013] Furthermore, the radioactive source fixing column is provided with a plurality of radioactive source mounting holes at intervals, the number of radioactive source mounting holes being the same as the number of radioactive sources, and the plurality of radioactive sources being respectively housed within the plurality of radioactive source mounting holes.

[0014] As can be seen from the above solutions, the advantages of this utility model are:

[0015] This invention employs a multi-source irradiation device with a mobile source output structure, which avoids problems such as low cross-channel ratio and slow source output time, thereby improving the calibration accuracy and working efficiency of the corresponding detection instruments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the multi-source irradiation device of this utility model;

[0017] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0018] Figures 3 to 5 A schematic diagram of the movement of the radiation source fixing column within the through hole;

[0019] In the attached figures, the following labels are used:

[0020] 1-Multi-source irradiation device;

[0021] 10-Ontology;

[0022] 100 - Through hole;

[0023] 101 - First ray output port;

[0024] 11-Radiation source fixation column;

[0025] 110 - Threaded hole;

[0026] 112 - Second ray output port;

[0027] 1120-ray input terminal;

[0028] 1121-ray output terminal;

[0029] 113 - Radiation source mounting hole;

[0030] 12-Radioactive source;

[0031] 120 - First radioactive source;

[0032] 121 - Second radioactive source;

[0033] 122 - Third radioactive source;

[0034] 123 - Fourth radioactive source;

[0035] 1200-ray emission end;

[0036] 13-Scattering cavity;

[0037] 14-Source blocking;

[0038] 140 - Blind hole;

[0039] 15 steps. Detailed Implementation

[0040] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of this utility model, but it is not intended to limit the scope of protection of the appended claims of this utility model.

[0041] References to "embodiment," "another embodiment," "this embodiment," etc., in the specification refer to embodiments that may include specific features, structures, or characteristics, but not every embodiment must include these specific features, structures, or characteristics. Furthermore, such expressions do not refer to the same embodiment. Moreover, when describing specific features, structures, or characteristics in conjunction with embodiments, whether or not explicitly described, it is indicated that incorporating such features, structures, or characteristics into other embodiments is within the knowledge of those skilled in the art.

[0042] The specification and subsequent claims use certain terms to refer to specific components or parts. Those skilled in the art will understand that users or manufacturers may use different names or terms to refer to the same component or part. This specification and claims do not distinguish components or parts by differences in name, but rather by differences in function. The terms "comprising" and "including" used throughout the specification and claims are open-ended and should be interpreted as "including but not limited to". Furthermore, the term "connection" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connections via other means.

[0043] It should be noted that in the description of this utility model, the terms "vertical", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship or parameters, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, a specific size, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] A gamma-ray reference radiation field is used for the calibration of radiation protection dosimeters and dose rate meters, the scaling of personal dosimeters, and the determination of the energy response of dosimeters and dose rate meters. It plays a crucial role in accurately quantifying the ionizing radiation exposure received by radiation workers and the public, and in correctly assessing the effects on the human body. Therefore, establishing a gamma-ray reference radiation field is of great significance for the safe conduct of radiation work.

[0045] The gamma-ray reference radiation field mainly consists of a radiation source irradiation device, a track positioning system and integrated control system, an intelligent vehicle positioning device, a safety interlock, and a video monitoring device. Among these, the radiation source irradiation device is divided into single-source and multi-source devices according to usage requirements. This invention mainly focuses on the innovative structural design of multi-source irradiation devices.

[0046] Please refer to Figures 1 to 5 ,in Figure 1 This is a structural diagram of a multi-source irradiation device 1 provided in an embodiment of the present invention. Figure 2 for Figure 1 A magnified view of a portion of the image. Figures 3 to 5 This diagram shows the process of the radioactive source fixing column 11 moving within the through hole 100.

[0047] The multi-source irradiation device 1 includes a main body 10, a radiation source fixing column 11, and multiple radiation sources 12. A through hole 100 is formed inside the main body 10 from top to bottom, and a first radiation output port 101 is formed on one side of the main body 10. Preferably, the first radiation output port 101 is perpendicular to the center of the main body 10, perpendicular to the through hole 100, and connected to the through hole 100. Multiple radiation sources 12 are spaced apart on the radiation source fixing column 11. The radiation source fixing column 11 is a solid column, placed inside the through hole 100, and movable within the through hole 100. When one of the radiation sources 12 moves to the position corresponding to the first radiation output port 101, that radiation source 12 emits radiation through the first radiation output port 101.

[0048] Specifically, the diameter of the through hole 100 is slightly larger than the outer diameter of the radiation source fixing post 11, allowing the radiation source fixing post 11 to move up and down within the through hole 100. The radiation source 12 includes a first radiation source 120, a second radiation source 121, a third radiation source 122, and a fourth radiation source 123. For example... Figure 1 As shown, when the first radiation source 120 moves to the position of the first ray output port 101, the first radiation source 120 emits rays through the first ray output port 101; as Figure 3 As shown, when the second radiation source 121 moves to the position of the first radiation output port 101, the second radiation source 121 emits radiation through the first radiation output port 101; as Figure 4 As shown, when the third radiation source 122 moves to the position of the first radiation output port 101, the third radiation source 122 emits radiation through the first radiation output port 101, as... Figure 5 As shown, when the fourth radioactive source 123 moves to the position of the first ray output port 101, the fourth radioactive source 123 emits rays through the first ray output port. The radioactive source 120 can be a radioactive source of different types or different nuclides of the same type, such as gamma rays.

[0049] In some embodiments, a scattering cavity 13 is provided at the center of the body 10. The scattering cavity 13 is connected to the first ray output port 101 and the through hole 100. The scattering cavity 13 is used to reduce the scattering of the radiation source, thereby enabling more precise output of the radiation source rays. Specifically, one of the radiation sources 12 on the radiation source fixing column 11, for example... Figure 1 When the first radiation source 120 shown moves into the scattering cavity 13, the first radiation source 120 emits radiation through the first radiation output port 101.

[0050] In some embodiments, a source plug 14 is provided on the opposite side of each radiation source 12 relative to the first radiation output port 101. Preferably, the source plug 14 has a cylindrical structure with threads (not shown) on its outer circumference, and a threaded hole 110 is formed in the radiation source fixing post 11 at the position corresponding to the source plug 14; the threads of the source plug 14 are connected to the threaded hole 110 of the radiation source fixing post 11. Figure 2 The image only shows the location of the threaded hole 110, not its internal threads. Specifically, a hexagonal blind hole 140 is provided on the inner side of the source plug 14. A tool is inserted into the hexagonal blind hole 140 to screw the source plug 14 into the threaded hole 110 of the radiation source fixing post 11. The source plug 14 can prevent the radiation source 12 from coming out from the left side.

[0051] In some embodiments, the radiation source fixing post 11 has a second radiation output port 112 located at the radiation emitting end 1200 of each radiation source 12. The diameter of the radiation output end 1121 of the second radiation output port 112 is the same as the diameter of the first radiation output port 101. Preferably, the second radiation output port 112 has a conical structure, and the inner diameter of the second radiation output port 112 gradually increases along the direction of the radiation emitted by the radiation source 12. The radiation input end 1120 of the second radiation output port 112 is connected to the radiation emitting end 1200 of the radiation source 12.

[0052] In some embodiments, a step 15 is provided between the radiation emitting end 1200 of the radiation source 12 and the radiation input end 1120 of the second radiation output port 112 to prevent the radiation source 12 from escaping from the second radiation output port 112 on the right side.

[0053] In some embodiments, the radiation source fixing post 11 is provided with a plurality of radiation source mounting holes 113 at intervals, the number of radiation source mounting holes 113 is the same as the number of radiation sources 12, and the plurality of radiation sources 12 are respectively housed (placed) in the plurality of radiation source mounting holes 113.

[0054] In some embodiments, the materials of the other parts (including the body 10, the radiation source fixing post 11, and the source plug 14) other than the radiation source 12 are lead, tungsten steel, or depleted uranium with high atomic numbers. Thus, except for the first radiation output port 101, there are shielding bodies at all other locations to shield radiation from directions other than the first radiation output port 101.

[0055] In this embodiment of the invention, four gamma-ray sources with different nuclides or activities (including the first radionuclide 120 to the fourth radionuclide 123) are placed into the radionuclide mounting holes 113 of the radionuclide fixing post 11. Then, the source plug 14 is tightened with a tool, and the radionuclide fixing post 11 is inserted into the running channel (i.e., the through hole 100) of the main body 10. Figure 1 , 3As shown in Figures 4 and 5, by moving the radiation source fixing column 11 to align different radiation sources 12 with the first radiation output port 101, different radiation source rays can be obtained from the first radiation output port 101.

[0056] The radioactive source 12 in this embodiment is illustrated using four gamma radioactive sources as an example, but the number and type of radioactive source 12 are not limited thereto. The radioactive source 12 can also be an alpha particle, beta particle, or neutron radioactive source, and can be adjusted according to actual needs.

[0057] In summary, the mobile source structure of this invention can avoid the problems of slow crosstalk ratio and slow source output time, thereby improving the calibration accuracy and efficiency of instruments such as radiation protection dosimeters and dose rate meters.

[0058] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms fall within the protection scope of the present invention.

Claims

1. A multi-source irradiation device, characterized in that, include: The body has a through hole inside, and a first ray outlet is opened on one side of the body, which is perpendicularly connected to the through hole; A radiation source fixing post is provided, in which multiple radiation sources are installed at intervals. The radiation source fixing post is placed in the through hole and can move within the through hole. When one of the radiation sources moves to the corresponding first radiation output port, the radiation source emits radiation through the first radiation output port.

2. The multi-source irradiation device according to claim 1, characterized in that, A scattering cavity is provided inside the body at the intersection of the first ray output port and the through hole, and the scattering cavity is connected to the first ray output port and the through hole; When one of the radiation sources moves into the scattering cavity, the radiation source emits radiation through the first radiation output port.

3. The multi-source irradiation device according to claim 1, characterized in that, Each of the radiation sources is provided with a source plug on the opposite side of the first radiation output port.

4. The multi-source irradiation device according to claim 3, characterized in that, The source plug has threads on its outer periphery and blind holes on its inner side; a threaded hole is made on the radiation source fixing post at the position corresponding to the source plug; the threads of the source plug are connected to the threaded hole of the radiation source fixing post.

5. The multi-source irradiation device according to claim 2, characterized in that, The scattering cavity is located at the center of the body.

6. The multi-source irradiation device according to claim 1, characterized in that, The radiation source fixing column has a second radiation output port at the radiation emitting end of each radiation source, and the diameter of the radiation output end of the second radiation output port is the same as the diameter of the first radiation output port.

7. The multi-source irradiation device according to claim 6, characterized in that, The second ray outlet has a conical structure, and the inner diameter of the second ray outlet gradually increases along the direction in which the radiation source emits rays.

8. The multi-source irradiation device according to claim 7, characterized in that, A step is provided between the emitting end of the radiation source and the input end of the second radiation output port to prevent the radiation source from escaping from the second radiation output port.

9. The multi-source irradiation device according to claim 1, characterized in that, The radioactive source fixing column is a solid column.

10. The multi-source irradiation device according to claim 1, characterized in that, The radioactive source fixing column is provided with a plurality of radioactive source mounting holes at intervals, the number of radioactive source mounting holes being the same as the number of radioactive sources, and the plurality of radioactive sources being respectively housed in the plurality of radioactive source mounting holes.

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