Sealed gamma radioactive source container

Abstract

The utility model belongs to the technical field of radioactive source application, and particularly relates to a sealed gamma radioactive source container. The device comprises an outer shell; the inner cladding is arranged in the outer shell; the shielding shell is mounted in the inner cladding shell; a radioactive source access channel and a ray channel are reserved on the shielding shell; the radioactive source taking cover is mounted at the radioactive source access channel, and a rubber gasket is arranged at the upper part of the radioactive source taking cover; after the radioactive source taking cover is closed, the rubber gasket is connected with the radioactive source and is used for fixing the radioactive source; a radiation dose detector is embedded in the radioactive source taking cover; the installation position of the shielding shutter is opposite to the ray channel; and the transmission mechanism is arranged in the outer shell, is connected with the shielding shutter and drives the shielding shutter to ascend and descend, so that opening and closing of the ray channel are realized. The container can meet the requirements of storage, transportation and use of the gamma radioactive source at the same time, and can effectively reduce the irradiation dose of workers in the radioactive source operation process.

Description

Technical Field

[0001] The utility model belongs to the technical field of radioactive source applications, and particularly relates to a sealed γ radioactive source container. Background Art

[0002] GBZ114-2006 "Radiological Health Protection Standard for Sealed Radioactive Sources and Sealed γ Radioactive Source Containers" stipulates that the design of the structure, materials, mass, and volume of a sealed γ radioactive source container should be comprehensively considered based on the type, activity, ray energy, usage and transportation methods, packaging grade, and leakage radiation level of the loaded radioactive source to ensure stable placement, easy loading and unloading, safe transportation, and convenient use. At the same time, according to the "Radiological Health Protection Standard for Sealed Radioactive Sources and Sealed γ Radioactive Source Containers", radioactive source containers can be divided into storage containers, transportation containers, and working containers due to their different functions.

[0003] Currently, most γ radioactive source containers use lead as the shielding material, which can reduce the radiation level outside the container. However, during use, the γ radioactive source needs to be taken out of the container and transferred to the working container through tools. Due to reasons such as operational errors or mechanical failures, the radioactive source may be damaged or lost during the process of taking out and storing, and some storage containers and γ radioactive sources cannot achieve synchronous positioning and query; moreover, during the transfer between different containers, the radioactive source may be damaged, lost, and unnecessary irradiation of personnel may occur.

[0004] Based on this, the utility model provides a new type of sealed γ radioactive source container to overcome the above defects. Content of the Utility Model

[0005] The purpose of the utility model is to provide a sealed γ radioactive source container that can output the radiation dose in real time and provide guarantee for the safe storage and use of the radioactive source; at the same time, by setting a shielding shell, a shielding shutter, and a transmission mechanism, it can meet the storage, transportation, and use of γ radioactive sources without replacing the radioactive source container, and can effectively reduce the radiation dose received by the staff during the operation of the radioactive source.

[0006] The utility model adopts the following technical solutions: A sealed γ radioactive source container, which includes:

[0007] An outer shell;

[0008] An inner cladding, which is placed inside the outer shell;

[0009] A shielding shell, which is installed inside the inner cladding; a radioactive source access channel and a ray channel are reserved on the shielding shell;

[0010] Radioactive source access cover, the radioactive source access cover is installed at the radioactive source access and exit channel, and a rubber gasket is provided on the upper part of the radioactive source access cover; when the radioactive source access cover is closed, the rubber gasket is in contact with the radioactive source to fix the radioactive source; a radiation dose detector is embedded and installed in the radioactive source access cover;

[0011] Shielding shutter, the installation position of the shielding shutter is opposite to the ray channel;

[0012] Transmission mechanism, the transmission mechanism is installed in the outer shell body, connected to the shielding shutter, and drives the shielding shutter to lift and lower to realize the opening and closing of the ray channel.

[0013] Furthermore, the shielding shell is spherical, and the radioactive source is placed at the center of the shielding shell.

[0014] Furthermore, the ray channel on the shielding shell is a polyethylene fan-shaped channel.

[0015] Furthermore, the rubber gasket is an arc-shaped rubber gasket.

[0016] Furthermore, the shielding shutter is annular and sleeved on the outside of the inner cladding.

[0017] Furthermore, the transmission mechanism includes a motor, a gear and a rack installed in the outer shell body;

[0018] Wherein, the gear is installed at the output end of the motor and is in meshing transmission connection with the vertically arranged rack, and the shielding shutter is installed at the bottom of the rack. The rotation of the gear drives the rack to move, driving the shielding shutter to lift and lower.

[0019] Furthermore, the motor is a double-output shaft motor.

[0020] Furthermore, a displacement sensor is installed in the displacement area of the shielding shutter.

[0021] Furthermore, a Beidou positioning module and a Beidou positioning antenna are installed on the top of the outer shell body, and the Beidou positioning antenna is electrically connected to the Beidou positioning module.

[0022] Furthermore, an outer cladding is wrapped around the outside of the outer shell body, and the outer cladding is made of stainless steel;

[0023] The outer cladding includes an upper cladding and a lower cladding, and the upper cladding and the lower cladding are connected by a stainless steel partition layer and bolts.

[0024] Compared with the prior art, the beneficial effects of the present utility model are:

[0025] 1) In this utility model, a radiation dose detector is installed on the radiation source access cover of the sealed γ radiation source container, which can output the radiation dose in real time and provide guarantee for the safe storage and use of the radiation source.

[0026] At the same time, the lifting of the shielding shutter is driven by a transmission mechanism to open and close the ray channel, thereby realizing the emission and shielding of γ rays. By setting the shielding shell, shielding shutter and transmission mechanism, it is possible to meet the storage, transportation and use of γ radiation sources without replacing the radiation source container, which can effectively reduce the radiation dose received by the staff during the operation of the radiation source. In addition, this container has the characteristics of small volume and convenient carrying, and can be widely used in fields such as level gauges and γ flaw detection.

[0027] 2) In this utility model, the sealed γ radiation source container is internally provided with a Beidou positioning module, a displacement sensor, a radiation dose detector, and a power supply power detection circuit. Correspondingly, the control module can send container position information, radiation dose information, shielding shutter displacement information, power supply power information, etc. to the control end through the communication module, which can provide guarantee for the safe storage and use of the radiation source, keep the radiation source always in a controllable state, and reduce the radioactive harm that the radiation source may cause to the external environment and personnel. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of this utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is the front view of the overall structure of the sealed γ radiation source container of this utility model;

[0030] Figure 2 It is the top view of the overall structure of the sealed γ radiation source container of this utility model;

[0031] Among them: outer shell 1, inner cladding 2, shielding shell 3, radiation source access channel 30, ray channel 31, radiation source access cover 4, shielding shutter 5, transmission mechanism 6, motor 60, gear 61, rack 62, Beidou positioning module 7, Beidou positioning antenna 8, stainless steel partition layer 9, radiation source 10, control module 11, power supply 12. Detailed Embodiments

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] The following will be combined with the attached Figure 1 to the attached Figure 2 and specific embodiments to elaborate on the present invention in detail:

[0034] As Figure 1-2 shown, according to the "Radiological Health Protection Standards for Sealed Radioactive Sources and Sealed γ-Ray Radioactive Source Containers", due to different functions, radioactive source containers can be divided into storage containers, transportation containers and working containers. And a new type of sealed γ-ray radioactive source container is designed in the present invention, which can be used in fields such as radiation monitoring instrument calibration, irradiation breeding, medical device sterilization, isotope heat source, etc., and can simultaneously meet the storage, transportation and operation requirements of radioactive source containers.

[0035] For this sealed γ-ray radioactive source container, the γ-ray radioactive source includes but is not limited to a Cs-137 radioactive source, and it includes:

[0036] An outer shell 1, the outer shell 1 is cylindrical, and is correspondingly divided into a lower radioactive source area, an upper functional area and a top antenna area;

[0037] An inner cladding 2, the inner cladding 2 is placed inside the outer shell 1 and in the lower radioactive source area of the outer shell 1. In this embodiment, the inner cladding 2 is a cylindrical cladding made of stainless steel and is used for the fixation of the shielding shell 3;

[0038] A shielding shell 3, the shielding shell 3 is installed inside the inner cladding 2; a radioactive source access channel 30 and a ray channel 31 are reserved on the shielding shell 3. The radioactive source access channel 30 is used for the access of the radioactive source, and the ray channel 31 serves as the emission channel of γ-rays during operation; at the same time, the shielding shell 3 can be made of materials such as lead, iron, depleted uranium, tungsten, etc. as needed, and can form a good shielding effect in a small space; by changing the thickness of the shielding shell 3, the usage requirements of radioactive sources with different activities can be met;

[0039] The radioactive source access cover 4 is installed at the radioactive source access and egress channel 30. In this embodiment, the radioactive source access cover 4 is of a T-shaped structure, which can be made of materials such as lead, iron, depleted uranium, tungsten, etc., and is fixed to the bottom of the outer housing 1 by bolts. After opening the radioactive source access cover 4, a radioactive source long-handle clamp can be used to put the radioactive source in and take it out. And a rubber gasket is provided on the upper part of the radioactive source access cover 4. When the radioactive source access cover 4 is closed, the rubber gasket is in contact with the radioactive source to fix the radioactive source. A radiation dose detector is embedded and installed in the radioactive source access cover 4, which can output the radiation dose in real time.

[0040] The shielding shutter 5 can be made of materials such as lead, iron, depleted uranium, tungsten, etc. The installation position of the shielding shutter 5 is opposite to the ray channel 31. Correspondingly, when the shielding shutter 5 rises, the ray channel 31 is exposed. When the shielding shutter 5 descends to be opposite to the ray channel 31, it shields the γ rays.

[0041] The transmission mechanism 6 is installed in the outer housing 1 and is located in the upper functional area of the outer housing 1. It is connected to the shielding shutter 5 and drives the shielding shutter 5 to lift and lower, so as to realize the opening and closing of the ray channel 31. Correspondingly, a displacement sensor can be installed in the displacement area of the shielding shutter 5 to feedback the position information of the shielding shutter 5 in real time.

[0042] In this utility model, for this sealed γ radioactive source container, a radiation dose detector is installed on the radioactive source access cover 4, which can output the radiation dose in real time, and can provide guarantee for the safe storage and use of the radioactive source.

[0043] At the same time, by driving the lifting of the shielding shutter 5 through the transmission mechanism 6, the opening and closing of the ray channel 31 are realized, and then the emission and shielding of γ rays are realized. By setting the shielding shell 3, the shielding shutter 5 and the transmission mechanism 6, it is possible to meet the storage, transportation and use of γ radioactive sources at the same time without replacing the radioactive source container, and the radiation dose received by the staff during the operation of the radioactive source can be effectively reduced. In addition, this container has the characteristics of small volume and convenient carrying, and can be widely used in fields such as level gauges and γ flaw detection.

[0044] Specifically, in this embodiment, the shielding shell 3 is spherical, and the radioactive source is placed at the center of the shielding shell 3. Correspondingly, the ray channel 31 on the shielding shell 3 is a polyethylene fan-shaped channel (that is, a fan-shaped channel made of polyethylene plastic), which serves as the γ ray emission channel during work.

[0045] The shape of the rubber gasket can be designed according to the shape of the radioactive source. For example, in this embodiment, the rubber gasket is a circular arc rubber gasket to increase the area of the gasket.

[0046] The shielding shutter 5 is annular and is sleeved on the outside of the inner shell 2. When the shielding shutter 5 corresponds to the ray channel 31, it plays a shielding role.

[0047] Specifically, the transmission mechanism 6 includes a motor 60 , a gear 61 and a rack 62 installed in the outer shell 1 .

[0048] Among them, the gear 61 is installed at the output end of the motor 60, and is meshed and connected with the vertically arranged rack 62. The shielding shutter 5 is installed at the bottom of the rack 62. The gear 61 rotates to drive the rack 62 to move, thereby driving the shielding shutter 5 to rise and fall. When in use, the shielding shutter 5 is lifted and lowered through the gear rack structure, and the structure is compact and the lifting stability is good.

[0049] In this embodiment, the motor 60 is a dual-output shaft motor, with output shafts on both sides of the motor, and gears 61 installed on the output shafts. The left and right sides rotate synchronously, driving the rack 62 to move upward, thereby driving the shielding shutter 5 to rise, and the shielding shutter 5 has good movement stability.

[0050] Specifically, a Beidou positioning module 7 and a Beidou positioning antenna 8 are installed on the top of the outer shell 1. The Beidou positioning antenna 8 is electrically connected to the Beidou positioning module 7. The Beidou positioning antenna 8 is placed in the top antenna area of ​​the outer shell 1 to receive Beidou system information and transmit it to the Beidou positioning module 7 to grasp the location information of the container in real time, so as to facilitate rapid retrieval in the event of an accident.

[0051] Specifically, an outer shell is provided outside the outer shell 1, and the outer shell is made of stainless steel, wraps the entire container, and has functions such as waterproof, fireproof, and impact-resistant. The outer shell includes an upper shell and a lower shell, and the upper shell and the lower shell are connected by a stainless steel partition layer 9 and bolts to facilitate maintenance and processing of internal equipment.

[0052] Specifically, the sealed gamma radiation source container also includes a control module 11 and a power supply 12. The Beidou positioning module 7, the displacement sensor, and the radiation dose detector are all electrically connected to the control module. The power supply is respectively electrically connected to the Beidou positioning module 7, the displacement sensor, the radiation dose detector, the control module 11, the communication module, and the transmission mechanism 6 to supply power to them. In this embodiment, the power supply is a lithium battery pack.

[0053] The control module may also include a power supply detection circuit. When the power detection is lower than the limit value, if the shielding shutter 5 is in an open state, the control module directly controls the shielding shutter 5 to close and reports to the control end. Correspondingly, the control module can send the container position information, radiation dose information, shielding shutter displacement information, power supply information, etc. to the control end through the communication module, and alarm in time when abnormal conditions occur.

[0054] In addition, the control module is also electrically connected to the motor 60 in the transmission mechanism 6. After receiving the signal sent by the control module, the motor 60 raises or lowers the shielding shutter 5. Correspondingly, when the radiation source is in the preparation stage, the shielding shutter 5 is raised to expose the radiation channel 31, and when the work is finished, the shielding shutter 5 descends to face the radiation channel 31 to shield the γ-rays.

[0055] In this utility model, the sealed γ-radiation source container is internally provided with a Beidou positioning module 7, a displacement sensor, a radiation dose detector, and a power supply power detection circuit. Correspondingly, the control module can send container position information, radiation dose information, shielding shutter displacement information, power supply power information, etc. to the control terminal through the communication module, which can provide guarantee for the safe storage and use of the radiation source, keep the radiation source in a controllable state all the time, and reduce the radioactive harm that the radiation source may cause to the external environment and personnel.

[0056] In this utility model, the sealed γ-radiation source container is operated through a remote control terminal during use:

[0057] 1) After placing the container at the workplace for using the radiation source, the personnel leave and take protective measures.

[0058] 2) The remote control terminal inputs a start work signal, which is transmitted to the control module through the communication module to control the transmission mechanism 6 to raise the shielding shutter 5.

[0059] 3) The γ-rays emitted by the γ-radiation source enter the workplace through the radiation channel 31.

[0060] 4) After the work is finished, the remote control terminal inputs an end work signal, which is transmitted to the control module again through the communication module to control the transmission mechanism 6 to lower the shielding shutter 5 to shield the γ-rays.

[0061] 5) The staff enter the workplace, take out the radiation source container from the workplace, and end the use.

[0062] The above further describes the present utility model with the aid of specific embodiments. However, it should be understood that the specific description herein should not be construed as a limitation on the essence and scope of the present utility model. Various modifications made by those of ordinary skill in the art to the above embodiments after reading this specification all fall within the scope protected by the present utility model.

Claims

1. A sealed gamma radiation source container, characterized in that: It includes: outer shell; An inner shell, wherein the inner shell is built into the outer shell; A shielding shell, the shielding shell is installed in the inner shell; a radiation source entry and exit channel and a ray channel are reserved on the shielding shell; A radiation source access cover, the radiation source access cover is installed at the radiation source access passage, and a rubber gasket is provided on the upper part of the radiation source access cover; when the radiation source access cover is closed, the rubber gasket is connected to the radiation source to fix the radiation source; a radiation dose detector is embedded in the radiation source access cover; A shielding shutter, wherein the installation position of the shielding shutter is opposite to the ray channel; A transmission mechanism is installed in the outer shell and connected to the shielding shutter to drive the shielding shutter to rise and fall, thereby realizing the opening and closing of the ray channel.

2. The sealed gamma radiation source container according to claim 1, characterized in that: The shielding shell is spherical, and the radiation source is arranged at the center of the shielding shell.

3. The sealed gamma radiation source container according to claim 2, characterized in that: The ray channel on the shielding shell is a polyethylene fan-shaped channel.

4. The sealed gamma radiation source container according to claim 3, characterized in that: The rubber gasket is an arc-shaped rubber gasket.

5. The sealed gamma radiation source container according to claim 3, characterized in that: The shielding shutter is annular and is sleeved on the outside of the inner shell.

6. The sealed gamma radiation source container according to claim 5, characterized in that: The transmission mechanism includes a motor, a gear and a rack installed in the outer shell; The gear is installed at the output end of the motor and is meshed and connected with the vertically arranged rack. The shielding shutter is installed at the bottom of the rack. The gear rotates to drive the rack to move, thereby driving the shielding shutter to rise and fall.

7. The sealed gamma radiation source container according to claim 6, characterized in that: The motor is a dual-output shaft motor.

8. The sealed gamma radiation source container according to claim 1, characterized in that: A displacement sensor is installed in the displacement area of ​​the shielding shutter.

9. The sealed gamma radiation source container according to claim 1, characterized in that: A Beidou positioning module and a Beidou positioning antenna are installed on the top of the outer shell, and the Beidou positioning antenna is electrically connected to the Beidou positioning module.

10. The sealed gamma radiation source container according to claim 1, characterized in that: An outer shell is provided outside the outer shell, and the outer shell is made of stainless steel; The outer shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are connected by a stainless steel partition layer and bolts.

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