A sealed radioactive source device for industrial irradiation

Abstract

The invention provides a sealed radioactive source device for industrial irradiation, comprising an outer shell and an inner shell arranged in the outer shell, wherein a source core is arranged in the inner shell, and two ends of the source core are respectively sealed and connected to a first end cap and a second end cap; a plurality of filling channels with different or equal diameters are arranged in the inner shell, and the filling channels are used to fill radioactive materials; an adjustable limiting plate is arranged on the inner wall of the filling channel, and the adjustable limiting plate is used to adjust the inner diameter of the filling channel; the sealed radioactive source device for industrial irradiation can realize the purpose of accurately controlling the activity of different radioactive sources, the accuracy of the dose and the uniformity of the distribution, and provides more possibilities of selection for the convenience and functionality of actual use, thereby satisfying the use value of one object for multiple uses.

Description

Technical Field

[0001] The present invention relates to the technical field of radiation sources, and in particular to a sealed radiation source device for industrial irradiation. Background Art

[0002] At present, industrial irradiation is mainly used in the fields of disinfection, sterilization, material modification, scientific research, etc. With the development of nuclear technology applications, the scale of the irradiation technology service industry has expanded year by year, and manufacturers in related industries such as health care, food, and medicine have put forward higher requirements for the accuracy and uniformity of irradiation doses. Sealed radioactive sources are radioactive materials that are sealed in a shell or tightly consolidated in a covering layer and are in solid form. Sealed radioactive sources have been gradually applied to the fields of industry, agriculture, medicine, environmental protection, etc., and have formed a certain industrial scale, achieving significant economic and social benefits. However, most of the existing radioactive sources can only be filled with one type of radioactive material, which brings many inconveniences to their use; in addition, when using, different amounts of radioactive materials are required. If multiple radioactive sources are prepared separately, it will bring more inconvenience to the work and have higher costs, which is not conducive to application and promotion. Summary of the invention

[0003] The purpose of the present invention is to provide a sealed radiation source device for industrial irradiation, which can achieve the purpose of accurately controlling the activity of different radiation sources, the accuracy of dose and the uniformity of distribution, and provides more options for the convenience and functionality of actual use, thereby satisfying the use value of one thing for multiple uses.

[0004] The embodiments of the present invention are implemented by the following technical solutions:

[0005] A sealed radioactive source device for industrial irradiation comprises an outer shell and an inner shell arranged in the outer shell, wherein a source core is housed in the inner shell, and a first seal and a second seal are respectively arranged at two ends of the source core, and the first seal and the second seal are respectively sealed and connected to the two ends of the inner shell; a plurality of filling channels with unequal or equal diameters are arranged in the inner shell, and the filling channels are used to fill radioactive materials; an adjustable limit plate is arranged on the inner wall of the filling channel, and the adjustable limit plate is used to adjust the inner diameter of the filling channel.

[0006] Furthermore, the adjustable limiting plate is cylindrical and is arranged coaxially with the filling channel, and a plurality of elastic limiting members are arranged between the adjustable limiting plate and the filling channel.

[0007] Furthermore, the two ends of the outer shell are respectively sealed and connected with a plug 1 and a plug 2; the plug 1 is arranged on the outside of the head 1 and seals the head 1; the plug 2 is arranged on the outside of the head 2 and seals the head 2.

[0008] Furthermore, a first clamping ring groove is provided on the circumferential surface of the first plug away from the first end of the sealing head; and a second clamping ring groove is provided on the circumferential surface of the second plug away from the second end of the sealing head.

[0009] Furthermore, a trapezoidal step 1 is provided on the circumferential surface of the first plug close to one end of the first end; and a trapezoidal step 2 is provided on the circumferential surface of the second plug close to one end of the second end.

[0010] Furthermore, an end of the trapezoidal step 1 of the plug 1 close to the end cap 1 is provided with a step for facilitating cutting of the outer shell.

[0011] Furthermore, one end of the sealing head 1 close to the plug 1 is provided with a blind hole for facilitating the formation of the weld during welding.

[0012] Furthermore, one end of the sealing head 2 close to the plug 2 is provided with a through hole for inert gas injection and convenient for spot welding and sealing.

[0013] Furthermore, a filling block is also provided in the outer shell, and the filling block is provided between the second end cap and the second plugging head, and is used to fill the gap between the second end cap and the second plugging head.

[0014] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0015] The present invention has a reasonable design and a simple structure. The inner shell structure is composed of a plurality of radioactive material filling channels with unequal or equal diameters. The radioactive physics and dose distribution requirements are used to arrange and meter the filling, and the filling quantity and filling arrangement of the radioactive material are artificially controlled to achieve the purpose of accurately controlling the activity of the radiation source, the accuracy of the dose and the uniformity of the distribution. In order to better control the filling amount of the radioactive material in each filling channel to meet different adaptation needs, the present invention arranges an adjustable limit plate on the inner wall of the filling channel, and the adjustable limit plate is used to adjust the inner diameter of the filling channel, so that each filling channel can be adaptively filled into channels of different sizes, which provides more possibilities for selection of the convenience and functionality of the filling channel, thereby satisfying the use value of one thing for multiple uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a sealed radiation source device for industrial irradiation provided by an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Cross-section view along the AA direction.

[0019] Icons: 1-plug one, 11-clamping ring groove one, 12-trapezoidal step one, 13-stage, 2-end cap one, 21-blind hole, 3-source core, 4-inner shell, 5-outer shell, 6-end cap two, 61-through hole, 7-filling block, 8-plug two, 81-clamping ring groove two, 82-trapezoidal step two, 9-filling channel, 10-adjustable limit plate, 11-elastic limit part. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Example 1

[0022] A sealed radioactive source device for industrial irradiation comprises an outer shell 5 and an inner shell 4 arranged in the outer shell 5, wherein a source core 3 is arranged in the inner shell 4, and a seal 1 2 and a seal 2 6 are respectively arranged at both ends of the source core 3, and the seal 1 2 and the seal 2 6 are respectively sealed and connected to the two ends of the inner shell 4; a plurality of filling channels 9 with different or equal diameters are arranged in the inner shell 4, and the filling channels 9 are used to fill radioactive substances; an adjustable limiting plate 10 is arranged on the inner wall of the filling channel 9, and the adjustable limiting plate 10 is used to adjust the inner diameter of the filling channel 9; the structure of the inner shell 4 of the present invention is composed of a plurality of radioactive substance filling channels 9 with different or equal diameters, and the radioactive substances are filled into the inner shell 4 by means of a plurality of sealing channels 9 with different or equal diameters. Radiophysics and dose distribution require arrangement and metering of subpackaging, artificial control of the subpackaging quantity and filling arrangement of radioactive materials, and the purpose of accurately controlling the activity of the radiation source, the accuracy of the dose, and the uniformity of distribution; in order to better control the filling amount of radioactive materials in each filling channel 9 to meet different adaptation needs, the present invention sets an adjustable limit plate 10 on the inner wall of the filling channel 9, and the adjustable limit plate is used to adjust the inner diameter of the filling channel 9, so that each filling channel 9 can be adaptively filled into channels of different sizes, providing more options for the convenience and functionality of the filling channel 9, thereby satisfying the use value of one thing for multiple uses. When filling radioactive materials of different lengths, if the length of the radioactive material to be filled is less than the length of the filling channel 9, a pad can be filled in the filling channel 9 in advance or after the radioactive material is filled, so that the radioactive material is in a stable filling state in the filling channel 9 to avoid shaking.

[0023] Specifically, the source core 3 is a radioactive isotope material (such as cobalt-60, iridium-192, cesium-137, etc.), and the radioactive nuclides of the source core 3 are in the form of powder, columnar or granular, etc. Different types of irradiation sources are made of different radioactive nuclides, and the structure is simple.

[0024] In this embodiment, the adjustable limit plate 10 is cylindrical and is arranged coaxially with the filling channel 9, and a plurality of elastic limit members 11 are arranged between the limit plate and the filling channel 9; thus, when the radioactive material is filled in, the elastic limit members 11 can be used to limit the adjustable limit plate to meet the required packaging quantity, thereby providing a variety of selection requirements for different inner diameters of a single filling channel 9, so that each filling channel 9 can be adaptively filled into channels of different sizes.

[0025] In this embodiment, the two ends of the outer shell 5 are respectively sealed with a plug 1 and a plug 2 8; the plug 1 is arranged on the outside of the head 2 and seals the head 2; the plug 2 8 is arranged on the outside of the head 2 6 and seals the head 2 6.

[0026] In this embodiment, a clamping ring groove 11 is provided on the circumferential surface of the plug 1 away from the end of the head 2; a clamping ring groove 81 is provided on the circumferential surface of the plug 8 away from the end of the head 6.

[0027] In this embodiment, a trapezoidal step 12 is provided on the circumferential surface of the plug 1 close to one end of the end cap 2; a trapezoidal step 82 is provided on the circumferential surface of the plug 2 8 close to one end of the end cap 2 6.

[0028] In this embodiment, the trapezoidal step 12 of the plug 1 is provided with a step 13 at one end close to the sealing head 2 for facilitating cutting of the outer shell 5 .

[0029] In this embodiment, a blind hole 21 is provided at one end of the sealing head 2 close to the plug 1 to facilitate the formation of the weld during welding.

[0030] In this embodiment, a through hole 61 is provided at one end of the second sealing head 6 close to the second plug 8 for inert gas injection and convenient for spot welding and sealing.

[0031] In this embodiment, a filling block 7 is further provided in the outer shell 5 , and the filling block 7 is provided between the second head 6 and the second plug 8 to fill the gap between the second head 6 and the second plug 8 .

[0032] The patent of the present invention adopts a double-layer cladding with inner and outer layers and is sealed and welded with plugs at both ends, and a sealing structure is used at both ends of the source core to seal it again, thereby ensuring the safety and shielding performance of the radiation source. The design is novel and reasonable, and has the characteristics of excellent sealing performance, good irradiation effect, low cost, safety and reliability, and easy clamping.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealed radioactive source device for industrial irradiation, characterized in that: It comprises an outer shell and an inner shell arranged in the outer shell. The inner shell contains a source core, and two ends of the source core are respectively provided with a first end cap and a second end cap, and the first end cap and the second end cap are respectively sealed and connected to the two ends of the inner shell; The inner shell is provided with a plurality of filling channels with different or equal diameters, and the filling channels are used to fill the radioactive material; the inner wall of the filling channel is provided with an adjustable limit plate, and the adjustable limit plate is used to adjust the inner diameter of the filling channel; the adjustable limit plate is cylindrical and is arranged coaxially with the filling channel, and a plurality of elastic limit members are arranged between the adjustable limit plate and the filling channel; The two ends of the outer shell are respectively sealed and connected with a plug 1 and a plug 2; the plug 1 is arranged on the outside of the head 1 and seals the head 1; the plug 2 is arranged on the outside of the head 2 and seals the head 2.

2. The sealed radiation source device for industrial irradiation according to claim 1, characterized in that: A clamping ring groove 1 is provided on the circumferential surface of the end of the plug 1 away from the end of the head 1; a clamping ring groove 2 is provided on the circumferential surface of the end of the plug 2 away from the end of the head 2.

3. The sealed radiation source device for industrial irradiation according to claim 2, characterized in that: The circumferential surface of the plug one close to the end of the head one is provided with a trapezoidal step one; the circumferential surface of the plug two close to the end of the head two is provided with a trapezoidal step two.

4. The sealed radiation source device for industrial irradiation according to claim 3, characterized in that: The end of the trapezoidal step 1 of the plug 1 close to the end cap 1 is provided with a step for facilitating cutting of the outer shell.

5. The sealed radiation source device for industrial irradiation according to claim 1, characterized in that: The end of the sealing head 1 close to the plug 1 is provided with a blind hole for facilitating the formation of a weld during welding.

6. The sealed radiation source device for industrial irradiation according to claim 1, characterized in that: The end of the second sealing head close to the second plug is provided with a through hole for inert gas injection and convenient for spot welding and sealing.

7. The sealed radiation source device for industrial irradiation according to claim 1, characterized in that: A filling block is also provided in the outer shell, and the filling block is provided between the second end cap and the second plugging head, and is used to fill the gap between the second end cap and the second plugging head.

Images