Radioactive source shielding container capable of monitoring in-place state of radioactive source
By designing a radio source shielding container with springs and detection components, the problem of cumbersome radio source acquisition steps and lack of real-time monitoring is solved, and the rapid operation and real-time monitoring of the radio source is achieved, and the management and monitoring effect of the radio source is improved.
Patent Information
- Application Number
- CN202411726757.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-03-07
AI Technical Summary
In the prior art, the steps for obtaining radioactive sources are cumbersome, and radiation accidents are prone to occur, and real-time in-situ monitoring is lacking, resulting in poor management and monitoring of radioactive sources.
A radiation source shielding container including a shielding body, a shielding base and a shielding base plate is designed. Through the cooperation of spring and the radiation source container, the radiation source is quickly opened and retracted, and a detection component is installed on the shielding base plate to monitor the in-position status of the radiation source in real time.
It realizes rapid operation of the radio source, reduces the radiation time and the amount of people's radiation, reduces the probability of radiation accidents, and monitors the in-situ status of the radio source in real time, improving the management and monitoring of the radio source.
Smart Images
Figure CN119581086A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of nuclear radiation protection, and in particular to a radiation source shielding container capable of monitoring the on-site status of a radiation source. Background Art
[0002] At present, the radiation source containers (lead cans) used for medium, high and low level radiation sources are often used in combination with shielding cans and shutters. Both the shielding cans and shutters are made of high-density shielding materials (such as lead and tungsten), which have good radiation shielding effects. The shutter is generally equipped with an electric or pneumatic interlocking mechanism. When the shutter is opened according to the command, the radiation source can emit radiation.
[0003] Medium, low, and micro-level radioactive sources or nuclear waste are also stored in lead cylinders, lead boxes, lead cabinets, etc. Medium, low, and micro-level radioactive sources often use thinner shielding materials to achieve shielding effects, so the size and weight of the shielding can are relatively small. For example, a 10mCi Cs137, shielding to 2.5μGy / h at 1 meter only requires 17mm of tungsten alloy, which is about 1.5kg of shielding material.
[0004] The mass of a medium, low or micro radioactive source is generally less than 10 grams. In conventional radioactive tests, medium, low and micro-level radioactive sources are often used to verify the response of the detector and the nuclide identification function. Users will use auxiliary tools such as tweezers to take the radioactive source from the shielding container, which will result in a high fault tolerance rate, long irradiation time, and the risk of the radioactive source falling. At the same time, there is a risk of the radioactive source being lost. If it is lost and not found and controlled in time, its radiation may harm people and cause radiation diseases; cause environmental pollution and destroy the ecological balance; cause public panic and affect social stability; and bring serious consequences such as economic losses. Summary of the invention
[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a radiation source shielding container that can monitor the status of the radiation source in place, so as to solve the problems in the prior art of cumbersome steps for taking the radiation source, easy occurrence of radiation accidents, lack of real-time on-site monitoring of the status of the radiation source in place, and strengthen the management and monitoring of the radiation source.
[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a radiation source shielding container capable of monitoring the in-place status of a radiation source, comprising a shielding body, a shielding base and a shielding bottom plate connected in sequence, wherein the shielding body and the shielding base are buckled and connected to each other, and the shielding bottom plate is detachably installed at the end of the shielding base away from the shielding body; a receiving hole is opened in the middle of the shielding body, the receiving hole passes through one end of the shielding body close to the shielding base and one end away from the shielding base, a shielding plug, a spring and a radiation source container are arranged in the receiving hole, the shielding plug is connected to the end of the receiving hole away from the shielding base, the radiation source container is located at the end of the receiving hole close to the shielding base, one end of the spring is connected to the shielding plug, and the other end is connected to the radiation source The shielding body and the shielding base are connected, and the radiation source container has a accommodating cavity for accommodating the radiation source; when the shielding body and the shielding base are buckled and connected, the radiation source container can compress the spring and enter the accommodating hole under the buckling pressure of the shielding body and the shielding base, and when the shielding body is separated from the shielding base, the spring can push part or all of the accommodating cavity of the radiation source container out of the accommodating hole; a detection groove is provided at one end of the shielding base away from the shielding body, and a detection hole is opened at the bottom of the detection groove, the detection hole passes through both ends of the shielding base and is opposite to the accommodating hole, and a detection component is installed on the shielding bottom plate, and when the shielding bottom plate is installed on the shielding base, the detection component is accommodated in the detection groove, and the detection end of the detection component is opposite to the detection hole.
[0007] As an optimization, the radiation source container is connected to the side wall of the accommodating hole by sliding fit, wherein the radiation source container includes a radiation source shell, one end of which is connected to the spring, and the accommodating cavity is provided inside near the other end.
[0008] As an optimization, an annular limiting boss is provided on the inner wall of the end of the accommodating hole facing away from the shielding plug, and correspondingly, a circle of flange is provided on the side wall of the end of the radiation source shell close to the shielding plug. When the shielding body is separated from the shielding base, under the action of the spring, the flange and the side of the limiting boss close to the shielding plug are abutted against each other, so that the accommodating cavity of the radiation source container leaves the accommodating hole.
[0009] As an optimization, when the flange of the radiation source shell abuts against a side of the limiting boss close to the shielding plug so that the radiation source shell partially extends out of the accommodating hole, the accommodating cavity of the radiation source container completely extends out of the accommodating hole.
[0010] As an optimization, a snap-fit groove is provided at one end of the shielding base close to the shielding body, a snap-fit boss matching the snap-fit groove is formed at one end of the shielding body close to the shielding base, and one end of the accommodating cavity passes through the end face of the snap-fit boss.
[0011] As an optimization, the snap-fit boss is a frustoconical structure, the snap-fit groove is a corresponding frustoconical groove, and annular grooves and annular protrusions are respectively provided on the side walls of the snap-fit boss and the snap-fit groove, and the annular protrusion can be snapped into the annular groove.
[0012] As an optimization, the annular groove and the annular protrusion extend along a fold line in the circumferential direction.
[0013] As an optimization, the detection component includes a monitoring circuit board fixed on the shielding bottom plate, a detector is mounted on the monitoring circuit board, and the detection end of the detector is directly opposite to the detection hole.
[0014] Compared with the prior art, the present invention has the following advantages: the shielding container of the present invention can quickly open and retract the radiation source, which is convenient and quick, shortens the irradiation time, reduces the radiation dose of personnel, and reduces the radiation impact on the surrounding environment. It is small in size and weight, easy to carry, convenient to transport, easy to operate, has a low fault tolerance rate, and reduces the probability of radiation accidents. At the same time, it can monitor the status of the radiation source in real time to prevent the loss of the radiation source. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of the radiation source of the present invention when it is in a shielding state; Figure 2 It is a schematic diagram of the structure of the radioactive source of the present invention when it is in an open state; In the figure: 1 shielding body, 2 shielding base, 3 spring, 4 shielding plug, 5 limiting boss, 6 flange, 7 radiation source shell, 8 radiation source, 9 snap-fit groove, 10 snap-fit boss, 11 shielding bottom plate, 12 monitoring circuit board, 13 detector, 14 detection slot, 15 detection hole. DETAILED DESCRIPTION
[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0017] 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. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0019] Example: See Figure 1-Figure 2A radiation source shielding container capable of monitoring the in-place status of a radiation source comprises a shielding container of a cylindrical structure, wherein the shielding container comprises a shielding body 1, a shielding base 2 and a shielding bottom plate 11 connected in sequence, wherein the shielding body 1 is coaxially snap-fitted with the shielding base 2, and the shielding bottom plate 11 is detachably mounted on the end of the shielding base 2 away from the shielding body 1 by bolts; specifically, a snap-fitting groove 9 is provided at one end of the shielding base 2 close to the shielding body 1, and a snap-fitting boss 10 matching the snap-fitting groove 9 is formed at one end of the shielding body 1 close to the shielding base 2, and one end of the accommodating cavity 8 passes through the end surface of the snap-fitting boss 10. In this embodiment, the snap-fitting boss 10 is a truncated cone structure, the snap-fitting groove 9 is a corresponding truncated cone-shaped groove, and an annular groove and an annular protrusion are respectively provided on the side walls of the snap-fitting boss 10 and the snap-fitting groove 9, and the annular protrusion can be snapped into the annular groove. The annular groove and the annular protrusion extend along the circumferential direction in a broken line, and the cross-sections of the annular groove and the annular protrusion are trapezoidal or triangular in corresponding shapes, thereby realizing a quick snap-on connection between the shielding body 1 and the shielding base 2, making installation and disassembly more convenient. At the same time, the annular groove and the annular protrusion extending along the broken line can not only reduce the scattering of rays, but also play a role in mutual limiting alignment and guiding.
[0020] An accommodating hole is opened in the shielding body 1 along its axial direction, and a spring 3 and a radiation source assembly are arranged in the accommodating hole. One end of the spring 3 is fixed in the accommodating hole, and the other end is connected to the radiation source assembly. When the shielding body 1 is buckled and connected with the shielding base 2, the radiation source container can compress the spring 3 and enter the accommodating hole under the buckling pressure of the shielding body 1 and the shielding base 2. When the shielding body 1 is separated from the shielding base 2, the spring 3 can push the accommodating cavity 8 of the radiation source container partially or completely out of the accommodating hole.
[0021] Specifically, the accommodating hole is a through hole that passes through both ends of the shielding body 1. A shielding plug 4 is installed at one end of the accommodating hole away from the shielding base 2, and the radiation source container is slidably arranged at the other end. One end of the spring 3 is connected to the shielding plug 4, and the other end is connected to the radiation source container. The shielding plug 4 is installed in the accommodating hole by threading, which can facilitate the assembly and disassembly of the radiation source container and play a role in shielding the radiation in the gap. The radiation source container includes a radiation source shell 7, and a housing cavity 8 for accommodating the radiation source is provided in the radiation source shell 7.
[0022] An annular limiting boss 5 is provided on the inner wall of the end of the accommodating hole away from the shielding plug 4. Correspondingly, a circle of flange 6 is provided on the side wall of the end of the radiation source shell 7 close to the shielding plug 4. When the shielding body 1 is separated from the shielding base 2, under the action of the spring 3, the flange 6 and the side of the limiting boss 5 close to the shielding plug 4 are abutted against each other, so that the accommodating cavity 8 leaves the accommodating hole. In this way, through the cooperation of the flange 6 and the limiting boss 5, the radiation source shell 7 can be prevented from being completely separated from the accommodating hole, the radiation source container can be prevented from falling off, and the safety performance is improved.
[0023] In addition, in order to improve the use effect of the radiation source, the accommodating cavity 8 is located at the end of the radiation source shell 7 away from the flange 6. When the flange 6 and the side of the limiting boss 5 close to the shielding plug 4 are abutted to make the radiation source shell 7 partially leave the accommodating hole, the end of the accommodating cavity 8 close to the flange 6 is higher than the end surface of the shielding body 1. In this way, the radiation source can be completely separated from the accommodating hole when in use, so that its rays can be completely radiated, reducing the shielding attenuation during use.
[0024] Among them, the shielding body 1, the shielding plug 4 and the shielding base 2 can be made of different materials. If it is a γ radiation source, the shielding material is made of materials with high atomic numbers, such as lead, tungsten and other materials; if it is a β radiation source, the shielding material is made of materials with low atomic numbers, such as organic glass and other materials; if it is a neutron radiation source, the shielding material is made of materials containing hydrogen elements, such as polyethylene, paraffin and other materials; the shielding body 1 and the shielding base 2 are both cylindrical structures. The cylinder is evenly stressed, and the materials around it are of equal thickness, and the shielding effect is isotropic. The material of the radiation source shell 7 is made of materials with low shielding performance and high strength, such as carbon fiber, aluminum alloy and the like.
[0025] In order to monitor the status of the radiation source in real time, in this embodiment, a detection groove 14 is provided at one end of the shielding base 2 away from the shielding body 1, and a detection hole 15 is opened at the bottom of the detection groove 14. The detection hole 15 passes through both ends of the shielding base 2 and is directly opposite to the receiving hole. A detection component is installed on the shielding bottom plate 11. When the shielding bottom plate 11 is installed on the shielding base 2, the detection component is accommodated in the detection groove 14, and the detection end of the detection component is directly opposite to the detection hole 15. A small hole is opened in the center of the shielding base 2, and a radiation source monitoring circuit board 12 is designed at the lower part. The monitoring circuit board 12 has a radiation source detector 13. The detector 13 can be selected from gas detection (such as J302βγ type counter tube, J405γ type counter tube, etc.), crystal detector 13 (such as LaBr3 crystal, NaI crystal, CsI crystal, etc.) and 3He tube and other detection elements. The radiation from the radiation source passes through the small hole in the center of the shielding base 2 and irradiates the detector 13 on the monitoring circuit board 12, and feeds back the corresponding detection signal to monitor whether the radiation source is in place and determine the type of the radiation source.
[0026] The monitoring circuit board 12 is installed at the lower part of the shielding base 2 and sealed with the shielding bottom plate 11 to fully shield the small amount of radiation in the small hole. A cable interface is designed between the shielding base 2 and the shielding bottom plate 11.
[0027] When it is necessary to shield the radiation source, the shielding body is buckled on the shielding base. Figure 1 As shown. The spring is compressed and deformed under the weight of the shield body, causing the radiation source and the radiation source shell to shrink into the shield body. The radiation source is in the shielding state. When the radiation source needs to be released, the shield body is flipped over, as shown. Figure 2 As shown, the radiation source and the radiation source shell pop out of the shielding body under the action of the spring force, and the radiation source is in an open state. Similarly, when the radiation source needs to be shielded again, it is only necessary to flip the shielding body onto the shielding base. The flipping action can be manual or motorized.
[0028] In summary, the shielding container of the present invention can quickly open and retract the radiation source, which is convenient and quick, shortens the irradiation time, reduces the radiation dose to personnel, and reduces the radiation impact on the surrounding environment. It is small in size and weight, easy to carry, convenient to transport, easy to operate, and has a low fault tolerance rate, thereby reducing the probability of radiation accidents.
[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.
Claims
1. A radiation source shielding container capable of monitoring the status of a radiation source in place, characterized in that: The invention comprises a shielding body, a shielding base and a shielding bottom plate which are connected in sequence, wherein the shielding body and the shielding base are buckled and connected with each other, and the shielding bottom plate is detachably mounted on the end of the shielding base which is away from the shielding body; a receiving hole is provided in the middle of the shielding body, and the receiving hole passes through the end of the shielding body which is close to the shielding base and the end which is away from the shielding base; a shielding plug, a spring and a radiation source container are provided in the receiving hole; the shielding plug is connected with the end of the receiving hole which is away from the shielding base; the radiation source container is located at the end of the receiving hole which is close to the shielding base; one end of the spring is connected with the shielding plug, and the other end is connected with the radiation source container; the radiation source container has a container for accommodating a radiation source. cavity; when the shielding body is buckled and connected with the shielding base, the radiation source container can compress the spring and enter the accommodating hole under the buckling pressure of the shielding body and the shielding base, and when the shielding body is separated from the shielding base, the spring can push part or all of the accommodating cavity of the radiation source container out of the accommodating hole; a detection groove is provided at one end of the shielding base away from the shielding body, and a detection hole is opened at the bottom of the detection groove, the detection hole passes through both ends of the shielding base and is opposite to the accommodating hole, and a detection component is installed on the shielding bottom plate, and when the shielding bottom plate is installed on the shielding base, the detection component is accommodated in the detection groove, and the detection end of the detection component is opposite to the detection hole.
2. A radiation source shielding container according to claim 1, characterized in that: The radiation source container is connected to the side wall of the accommodating hole by sliding cooperation, wherein the radiation source container comprises a radiation source shell, one end of which is connected to the spring, and the accommodating cavity is arranged inside near the other end.
3. A radiation source shielding container according to claim 2, characterized in that: An annular limiting boss is provided on the inner wall of one end of the accommodating hole away from the shielding plug. Correspondingly, a circle of flange is provided on the side wall of one end of the radiation source shell close to the shielding plug. When the shielding body is separated from the shielding base, under the action of the spring, the flange and the side of the limiting boss close to the shielding plug are abutted against each other, so that the accommodating cavity of the radiation source container leaves the accommodating hole.
4. A radiation source shielding container according to claim 3, characterized in that: When the flange of the radiation source shell abuts against the side of the limiting boss close to the shielding plug so that the radiation source shell partially extends out of the accommodating hole, the accommodating cavity of the radiation source container completely extends out of the accommodating hole.
5. The radiation source shielding container according to claim 1, characterized in that: A buckling groove is provided at one end of the shielding base close to the shielding body, a buckling boss matching the buckling groove is formed at one end of the shielding body close to the shielding base, and one end of the accommodating cavity passes through the end surface of the buckling boss.
6. A radiation source shielding container according to claim 5, characterized in that: The snap-fitting boss is a truncated cone structure, the snap-fitting groove is a corresponding truncated cone-shaped groove, and an annular groove and an annular protrusion are respectively provided on the side walls of the snap-fitting boss and the snap-fitting groove, and the annular protrusion can be snapped into the annular groove.
7. A radiation source shielding container according to claim 6, characterized in that: The annular groove and the annular protrusion extend along a circumferential direction in a broken line.
8. The radiation source shielding container capable of monitoring the status of a radiation source in place according to claim 1, characterized in that: The detection component comprises a monitoring circuit board fixed on the shielding bottom plate, a detector is mounted on the monitoring circuit board, and the detection end of the detector is directly opposite to the detection hole.