Radioactive source shielding container

Abstract

The utility model discloses a radioactive source shielding container which comprises a shielding body and a shielding base which are mutually buckled and connected, a containing hole is formed in the middle of the shielding body, and a shielding plug, a spring and a radioactive source container are arranged in the containing hole. The radioactive source container can compress the spring and enter the containing 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 containing cavity of the radioactive source container can be partially or completely pushed out of the containing hole through the spring. According to the shielding container, the radioactive source can be rapidly opened and withdrawn, the shielding container is convenient and rapid, irradiation time is shortened, personnel radiation quantity is reduced, irradiation influence on the surrounding environment is reduced, the shielding container is small in size and weight, easy to carry, convenient to transfer, easy to operate and low in fault tolerance rate, and the probability of radiation accidents is reduced.

Description

Technical Field

[0001] This utility model relates to the field of nuclear radiation protection technology, and in particular to a radioactive source shielding container. Background Technology

[0002] Currently, the radioactive source containers (lead containers) used for medium, high, and low-level radioactive sources often employ a combination of a shielding container and a shutter. Both the shielding container and the shutter use high-density shielding materials (such as lead and tungsten), providing excellent radioactive shielding. The shutter is generally equipped with an electric or pneumatic interlocking mechanism; upon command, the shutter opens, allowing the radioactive source to emit radiation.

[0003] Medium-, low-, and micro-level radioactive sources or nuclear waste are stored in lead containers, lead boxes, and lead cabinets. Medium-, low-, and micro-level radioactive sources often require only thinner shielding materials to achieve the desired shielding effect, so the size and weight of the shielding containers are relatively small. For example, a single 10mCi Cs-137 source, shielded at 1 meter to 2.5 μGy / h, requires only 17mm of tungsten alloy, or approximately 1.5kg of shielding material.

[0004] A typical low- to medium-level radioactive source weighs less than 10 grams. In routine radioactive experiments, low-, medium-, and micro-level radioactive sources are frequently used to verify detector response and nuclide identification capabilities. Users typically employ tweezers or other tools to remove the radioactive source from its shielding container. This process results in a higher margin of error, longer exposure time, and the risk of the source being dropped. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a radiation source shielding container to solve the problems of cumbersome steps in handling radiation sources and the easy occurrence of radiation accidents in the existing technology.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a radioactive source shielding container includes a shielding body and a shielding base that are interlocked. A receiving hole is provided in the middle of the shielding body, and the receiving hole extends through one end of the shielding body near the shielding base and the other end away from the shielding base. A shielding plug, a spring, and a radioactive source container are provided in the receiving hole. The shielding plug is connected to the end of the receiving hole away from the shielding base, and the radioactive source container is located at the end of the receiving hole near the shielding base. One end of the spring is connected to the shielding plug, and the other end is connected to the radioactive source container. The radioactive source container has a receiving cavity for accommodating the radioactive source. When the shielding body and the shielding base are interlocked, the radioactive source container can compress the spring under the interlocking pressure of the shielding body and the shielding base and enter the receiving hole. When the shielding body and the shielding base are separated, the spring can push part or all of the receiving cavity of the radioactive source container out of the receiving hole.

[0007] As an optimization, the radioactive source container is slidably connected to the side wall of the receiving hole, wherein the radioactive source container includes a radioactive source shell, one end of which is connected to a spring, and the receiving 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 receiving hole away from the shielding plug. Correspondingly, a flange is provided on the side wall of the radioactive source casing near the shielding plug. When the shielding body separates from the shielding base, under the action of the spring, the flange abuts against the side of the limiting boss near the shielding plug, causing the receiving cavity of the radioactive source container to leave the receiving hole.

[0009] As an optimization, when the flange of the radioactive source casing abuts against the side of the limiting boss near the shielding plug, causing part of the radioactive source casing to extend out of the receiving hole, the receiving cavity of the radioactive source container fully extends out of the receiving hole.

[0010] As an optimization, the shielding base is provided with a fastening groove at one end near the shielding body, and a fastening boss that matches the fastening groove is formed at one end of the shielding body near the shielding base, with one end of the accommodating cavity penetrating the end face of the fastening boss.

[0011] As an optimization, the fastening boss is a frustum-shaped cone structure, the fastening groove is a corresponding frustum-shaped groove, and an annular slot and an annular protrusion are respectively provided on the sidewalls of the fastening boss and the fastening groove, and the annular protrusion can be engaged in the annular slot.

[0012] As an optimization, the annular groove and the annular protrusion extend in a zigzag pattern along the circumference.

[0013] 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 to personnel, reduces the radiation impact on the surrounding environment, has a small size and weight, is easy to carry and transport, is easy to operate, has a low fault tolerance rate, and reduces the probability of radiation accidents. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the radioactive source of this utility model when it is in a shielded state;

[0015] Figure 2 This is a schematic diagram of the structure of the radioactive source of this utility model when it is in the open state;

[0016] In the diagram: 1 shielding body, 2 shielding base, 3 spring, 4 shielding plug, 5 limiting boss, 6 flange, 7 radiation source casing, 8 accommodating cavity, 9 fastening groove, 10 fastening boss. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0019] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply 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 this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Example: See Figures 1-2A radiation source shielding container includes a cylindrical shielding container. The shielding container includes a shielding body 1 and a shielding base 2 coaxially connected. Specifically, the shielding base 2 has a fastening groove 9 at one end near the shielding body 1, and a fastening boss 10 that mates with the fastening groove 9 is formed at one end of the shielding body 1 near the shielding base 2. One end of the receiving cavity 8 passes through the end face of the fastening boss 10. In this embodiment, the fastening boss 10 is a frustum conical structure, and the fastening groove 9 is a corresponding frustum conical groove. Annular slots and annular protrusions are respectively provided on the sidewalls of the fastening boss 10 and the fastening groove 9, and the annular protrusions can be engaged in the annular slots. The annular groove and annular protrusion extend along the circumference in a zigzag pattern, and the cross-sections of the annular groove and annular protrusion are trapezoidal or triangular in shape, thereby enabling the shielding body 1 and the shielding base 2 to be quickly snapped together, making installation and disassembly more convenient. At the same time, the annular groove and annular protrusion extending along the zigzag pattern can not only reduce the scattering of rays, but also play a role in mutual positioning, alignment and guidance.

[0021] A receiving hole is provided in the shielding body 1 along its axial direction, and a spring 3 and a radiation source container are provided in the receiving hole. One end of the spring 3 is fixed in the receiving cavity 8, and the other end is connected to the radiation source container. When the shielding body 1 is fastened to the shielding base 2, the radiation source container can compress the spring 3 and enter the receiving hole under the fastening 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 part or all of the receiving cavity 8 of the radiation source container out of the receiving hole.

[0022] Specifically, the receiving hole is a through hole penetrating both ends of the shielding body 1. A shielding plug 4 is threadedly installed at one end of the receiving hole away from the shielding base 2, and the radioactive source container is slidably installed 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 radioactive source container. The shielding plug 4 is threaded into the receiving hole, which facilitates the assembly and disassembly of the radioactive source container and also serves to shield the radiation from the gaps. The radioactive source container includes a radioactive source shell 7. The receiving cavity 8 is provided inside the radioactive source shell 7 near the end away from the spring 3. This receiving cavity 8 is used to accommodate the radioactive source.

[0023] An annular limiting boss 5 is provided on the inner wall of the end of the receiving hole away from the shielding plug 4. Correspondingly, a flange 6 is provided on the side wall of the radioactive source casing 7 near the shielding plug 4. When the shielding body 1 separates from the shielding base 2, under the action of the spring 3, the flange 6 abuts against the side of the limiting boss 5 near the shielding plug 4, causing the receiving cavity 8 of the radioactive source container to leave the receiving hole. In this way, through the cooperation of the flange 6 and the limiting boss 5, the radioactive source casing 7 can be prevented from completely detaching from the receiving hole, preventing the radioactive source container from falling off and improving safety performance.

[0024] In addition, in order to improve the effectiveness of the radiation source, the receiving cavity 8 is located at the end of the radiation source shell 7 away from the flange 6. When the flange 6 abuts against the side of the limiting boss 5 near the shielding plug 4, causing the radiation source shell 7 to partially leave the receiving hole, the end of the receiving cavity 8 near the flange 6 is higher than the end face of the shielding body 1. In this way, the radiation source can be completely removed from the receiving hole during use, so that its radiation can be fully emitted and the shielding attenuation during use is reduced.

[0025] The shielding body, shielding plug, and shielding base can be made of different materials. For gamma-ray sources, the shielding material uses materials with high atomic numbers, such as lead and tungsten; for beta-ray sources, the shielding material uses materials with low atomic numbers, such as plexiglass; for neutron-ray sources, the shielding material uses materials containing hydrogen, such as polyethylene and paraffin wax. Both the shielding body and the shielding base are cylindrical structures. The cylinder distributes stress evenly, and the material on all four sides is of uniform thickness, resulting in isotropic shielding. The material used to encase the radioactive source is a high-strength material with low shielding performance, such as carbon fiber and aluminum alloy.

[0026] In practical use, when it is necessary to shield a radiation source, the shielding body is attached to the shielding base, such as... Figure 1 As shown. The spring compresses and deforms under the weight of the shield, causing the radioactive source and its casing to retract into the shield. The radioactive source is then in a shielded state. When it is necessary to release the radioactive source, the shield is flipped over, as shown. Figure 2 As shown, the radioactive source and its casing are ejected from the shielding body by the spring force, and the radioactive source is in the open state. Similarly, when it is necessary to shield the radioactive source again, simply flip the shielding body onto the shielding base. The flipping action can be manual or motorized.

[0027] In summary, the shielding container of this invention can quickly open and retract the radiation source, which is convenient and fast, shortens the irradiation time, reduces the radiation dose to personnel, reduces the radiation impact on the surrounding environment, 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.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A radiation source shielding container, characterized in that: The device includes a shielding body and a shielding base that are interlocked. A receiving hole is provided in the middle of the shielding body, extending through both the end of the shielding body near the shielding base and the end away from the shielding base. A shielding plug, a spring, and a radioactive source container are disposed within the receiving hole. The shielding plug is connected to the end of the receiving hole away from the shielding base, and the radioactive source container is located at the end of the receiving hole near the shielding base. One end of the spring is connected to the shielding plug, and the other end is connected to the radioactive source container. The radioactive source container has a cavity for accommodating the radioactive source. When the shielding body and the shielding base are interlocked, the radioactive source container can compress the spring under the interlocking pressure and enter the receiving hole. When the shielding body and the shielding base are separated, the spring can partially or completely push the receiving cavity of the radioactive source container out of the receiving hole.

2. The radiation source shielding container according to claim 1, characterized in that: The radioactive source container is slidably connected to the side wall of the receiving hole. The radioactive source container includes a radioactive source shell, one end of which is connected to a spring, and the receiving cavity is provided inside the shell 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 the receiving hole away from the shielding plug. Correspondingly, a flange is provided on the side wall of the radioactive source casing near the shielding plug. When the shielding body separates from the shielding base, under the action of the spring, the flange abuts against the side of the limiting boss near the shielding plug, causing the receiving cavity of the radioactive source container to leave the receiving hole.

4. A radiation source shielding container according to claim 3, characterized in that: When the flange of the radioactive source casing abuts against the side of the limiting boss near the shielding plug, causing part of the radioactive source casing to extend out of the receiving hole, the receiving cavity of the radioactive source container fully extends out of the receiving hole.

5. A radiation source shielding container according to claim 1, characterized in that: The shielding base has a fastening groove at one end near the shielding body, and a fastening boss that matches the fastening groove is formed at one end of the shielding body near the shielding base. One end of the receiving cavity passes through the end face of the fastening boss.

6. A radiation source shielding container according to claim 5, characterized in that: The fastening boss is a frustum-shaped cone structure, and the fastening groove is a corresponding frustum-shaped groove. Annular slots and annular protrusions are respectively provided on the side walls of the fastening boss and the fastening groove. The annular protrusions can be engaged in the annular slots.

7. A radiation source shielding container according to claim 6, characterized in that: The annular groove and annular protrusion extend in a zigzag pattern along the circumference.

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