Radiation protection device for radiopharmaceuticals

Abstract

The application relates to a radioactive treatment drug radiation protection device and belongs to the field of radioactive drug protection instruments. A lead tank top port is slidably matched with a placement frame provided with multiple columns of annular array placement grooves at the bottom end. A protection bottle is vertically inserted into the groove. A medicine bottle is arranged in the protection bottle and is fixed with a magnetically attractable magnet. A tubular output cylinder with a closed top end and an open bottom end is coaxially arranged in the tank. A strip-shaped via is arranged in an annular array on the top end side wall of the output cylinder. Each via is hingedly connected with a lead door. A belt conveying assembly for radial conveying is arranged at the bottom end inside the lead tank. The belt conveying assembly is driven to horizontally rotate by a rotating column. The rotating column is connected with a screw rod mechanism. The screw rod mechanism can drive an electromagnet above a tank cover to synchronously translate with a sliding magnet. The electromagnet is electrified after being slid to above the corresponding protection bottle. The protection bottle is repelled to fall to the belt conveying assembly. After being conveyed to the bottom port of the output cylinder, the sliding magnet retreats to attract the protection bottle to the top end of the output cylinder. The medicine protection and automatic taking and placing are realized. The radiation leakage risk is effectively reduced. The operation safety and convenience are improved.

Description

Technical Field

[0001] This invention relates to the field of radiation protection devices for drugs, specifically to a radiation protection device for radiotherapy drugs. Background Technology

[0002] Radiotherapy drugs are high-risk medical materials, and their storage, transportation, and handling require strict radiation shielding to prevent radiation leakage and harm to medical personnel and the surrounding environment. Currently, in clinical and laboratory settings, the protective storage equipment for radiotherapy drugs mostly uses traditional lead containers, relying on the lead container body to achieve basic radiation shielding. This is currently the most widely used radiotherapy drug protective carrier.

[0003] However, in practical applications, traditional lead containers have significant safety hazards and defects. The core problems are concentrated in the drug dispensing process, mainly manifested in the excessively large exposed area and the excessively long exposure time when dispensing drugs.

[0004] The reasons are as follows: First, existing traditional lead containers do not have an automated drug retrieval function. When a single radiopharmaceutical needs to be retrieved, the lid of the lead container must be fully opened to keep the lead container open so that the drug can be retrieved manually. This exposes all the radiopharmaceuticals stored inside the lead container to the external environment. Once a leak occurs, the area of ​​the leak channel is undoubtedly large.

[0005] Secondly, traditional methods of drug retrieval rely on manual searching and picking of the target drugs, which naturally takes longer. In particular, if radioactive drugs are stored in layers inside the lead container, manual retrieval will greatly increase the time the lead container is open. Therefore, it will not only significantly expand the radiation exposure range of the radioactive drugs, but also prolong the radiation exposure time, leading to a possible large-scale radiation leakage, which seriously threatens the personal safety of medical staff.

[0006] Therefore, there is an urgent need for a radiation protection device for radiotherapy drugs that can not only provide full-sealed protection but also achieve automated drug dispensing and has strong operational stability. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a radiation protection device for radiotherapy drugs, so as to solve the technical problem that the radiation protection devices for radiotherapy drugs in the prior art may leak a large amount of radiation when handling the drugs, which seriously threatens the personal safety of medical personnel.

[0008] This invention is achieved through the following technical solution: A radiation protection device for radiotherapy drugs includes a lead container and a movable component installed at the bottom of the lead container. A mounting frame is coaxially and slidably inserted into the top port of the lead container. The bottom end of the mounting frame has several rows of annularly arranged mounting slots. A protective bottle is vertically inserted into the mounting slots. A vial containing radiotherapy drugs is installed inside the protective bottle. The protective bottle is fixed with a magnet. A lid is detachably covered at the top port of the lead container, and the lid presses the mounting frame tightly against a positioning plate. A cylindrical output cylinder is also coaxially installed inside the lead container. The bottom end of the output cylinder is open and the top end is closed. Several strip-shaped through holes for removing the protective bottle are arranged in annular array on the side wall near the top end of the output cylinder. Each strip-shaped through hole is hinged with a lead door. The bottom of the lead can is equipped with a belt conveyor assembly that transports the lead can radially. The belt conveyor assembly is driven to rotate in a horizontal plane by a rotating column. The rotating column is also connected to a screw mechanism that drives an electromagnet and a sliding magnet located above the can lid to move synchronously. When the rotating column rotates, the electromagnet and the belt conveyor assembly are always positioned vertically opposite each other. When the electromagnet slides on the screw of the screw mechanism to the top of the corresponding protective bottle and is energized, the protective bottle is repelled and falls onto the belt conveyor assembly. When the belt conveyor assembly is running, it can transport the protective bottle to the bottom port of the output cylinder, where it is pulled upwards to the top of the output cylinder by the sliding magnet that has been moved back to the center of the top of the output cylinder.

[0009] Furthermore, the lead screw mechanism includes a screw, a threaded block, and a first motor for driving the screw to rotate. The screw is located above the can lid and arranged radially along the lead can. The threaded block is threaded onto the screw, and the electromagnet is fixed on the threaded block. The sliding magnet is fixed to the top of the threaded block by a crank rod. The sliding magnet can slide on the sealing plate at the top of the output cylinder.

[0010] Furthermore, the rotating column rotatably penetrates the bottom of the lead can, and an L-shaped curved arm is fixed to its side wall outside the bottom of the lead can. The first motor is fixed to one side of the top of the curved arm, and the screw is rotatably installed on the other side.

[0011] Furthermore, a triangular reinforcing plate is fixed to the side wall of the vertical section of the crank arm, and a mounting plate is horizontally fixed to the reinforcing plate. The first motor is fixed to the mounting plate, and the main shaft of the first motor rotates through the vertical section and is then coaxially fixed with the screw.

[0012] Furthermore, a slide is fixed to the bottom of one end of the screw near the first motor, and the slide is in sliding contact with the top surface of the can lid; a bushing is fixed to the other end of the screw, and the bushing is rotatably sleeved on the output cylinder protruding from the can lid.

[0013] Furthermore, the two drive shafts of the belt conveyor assembly are rotatably mounted on a horizontally positioned support plate via brackets. A second motor is fixed to the end of one of the drive shafts. The rotating column is vertically fixed to the bottom of one end of the support plate, and a support base is fixed to the bottom of the other end. The bottom of the support base slides in contact with the inner bottom surface of the lead can.

[0014] Furthermore, a positioning plate is horizontally fixed inside the lead can at the upper end. The positioning plate has several vertically arranged insertion holes in a circular array. The placement slot and the insertion holes are aligned vertically, so that when the protective bottle is pushed downwards, it is guided by the insertion holes and falls smoothly onto the belt conveyor assembly.

[0015] Furthermore, a guide partition is coaxially fixed inside the lead can below the positioning plate. The guide partition has a ring array of several guide holes arranged radially therein. Each guide hole is opposite to a row of protective bottles above it, so that after the protective bottle passes through the insertion hole and falls into the guide hole, it can be guided by the guide hole to move to the bottom port of the output cylinder with the belt conveyor assembly.

[0016] Furthermore, the bottom port of the output cylinder has a ring array of several strip-shaped notches on its side wall. Each strip-shaped notch is used to remove a column of protective bottles. The top of the protective bottle has a truncated cone structure that is smaller at the top and larger at the bottom, so that when the protective bottle is magnetically attracted and moved upward, the top of the protective bottle is inserted into the positioning groove in the center of the top surface of the output cylinder.

[0017] Furthermore, it also includes a controller for controlling the electromagnet and all motors, the control logic of which is as follows: S1. Start the third motor that drives the rotating column, causing the rotating column to rotate along with the belt conveyor assembly to the bottom of the corresponding column of protective bottles; S2. Start the first motor to move the threaded block to directly above the corresponding protective bottle, and then energize the electromagnet for a set time to push the protective bottle downward from the mounting frame and onto the belt conveyor assembly; S3. Start the second motor to allow the belt conveyor assembly to transfer the protective bottle on its surface to the lower port of the output cylinder. Then start the first motor to reverse so that the sliding magnet slides back to the center of the top of the output cylinder to suck out the protective bottle upwards.

[0018] The beneficial effects of this invention are as follows: This radiation protection device for radiotherapy drugs, based on the technical shortcomings of traditional lead containers, integrates an automated drug dispensing mechanism, magnetic control, and multi-layered guiding protection. Compared with existing technologies, it has several significant advantages, as follows: 1. Significantly reduces the risk of radiation leakage, achieving full-process sealed safety protection. This invention abandons the traditional method of fully opening lead containers for drug retrieval, instead relying on lead containers, output cylinders, and openable lead doors to form a comprehensive, sealed radiation protection system. During drug retrieval, there is no need to open the entire container; individual drugs are retrieved or placed using only corresponding slots and the temporary opening and closing of the lead door, significantly reducing the radiation exposure area of ​​radioactive drugs. Simultaneously, automated operation replaces manual drug retrieval, eliminating the time-consuming process of manually searching for drugs and drastically shortening radiation exposure time. It effectively avoids radiation leakage problems from both spatial and temporal perspectives, completely resolving the safety hazards of traditional equipment requiring open container retrieval and prolonged exposure of the entire drug volume, thus comprehensively ensuring the operational safety of medical personnel.

[0019] 2. Enables automated and precise drug dispensing, resulting in efficient and convenient operations. This invention integrates a lead screw mechanism, a belt conveyor assembly, a rotary alignment structure, and an electrical control system to achieve fully automated drug retrieval operations. A third motor drives a rotating column to rotate and align the belt conveyor assembly, while a first motor drives the lead screw mechanism to precisely position the electromagnet. This, combined with a continuous workflow of automatic unloading via magnetic repulsion, belt conveyor transfer, and magnetic lifting with a sliding magnet, allows for precise retrieval of the target protective vial without manual intervention, avoiding the drawbacks of manual searching and handling. It enables centralized storage and automated, point-to-point retrieval of different types and specifications of radiotherapy drugs, adapting to diverse clinical drug needs, significantly improving the efficiency of radiotherapy drug retrieval operations, and reducing the intensity of manual operations.

[0020] 3. The magnetic attraction structure is scientifically designed and effectively prevents medication from accidentally falling out. This invention also employs electromagnets with opposite polarities and sliding magnets working together to form a complementary magnetic control protection mechanism. While the energized electromagnet generates a magnetic repulsive force to precisely push out the target protective bottle, the sliding magnet with opposite polarities generates an attractive force, effectively counteracting the electromagnet's repulsive force on adjacent protective bottles and preventing unintended drops of surrounding non-target protective bottles due to magnetic influence. Furthermore, based on the above principle, those skilled in the art can adapt it by adding auxiliary magnets to further enhance the effect of counteracting magnetic repulsion, completely eliminating the problem of accidental drop or removal of two adjacent protective bottles, and significantly improving the reliability of equipment operation and the stability of drug storage.

[0021] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the external structure of a radiation protection device for radiotherapy drugs according to the present invention; Figure 2 A schematic diagram showing the lead container of a radiation protection device for radiotherapy drugs after it has been cut open. Figure 3 A partial cross-sectional schematic diagram of the radiation protection device for radiotherapy drugs; Figure 4 This is a schematic diagram of the longitudinal section of the mounting frame; Figure 5 This is a bottom view of the mounting frame; Figure 6 This is a top view of the mounting frame; Figure 7 A schematic diagram of the external structure of the output cylinder with a lead door; Figure 8 for Figure 7 A bottom view of the structure shown; Figure 9 This is a cross-sectional view of the connection structure between the screw and the bushing. Figure 10 This is a top view of the connection structure between the screw and the bushing; Figure 11 This is a top view of the guide partition; Figure 12 This refers to the specific structure of a protective bottle; Figure 13 For use with Figure 12 A schematic diagram of the structure of the output cylinder that works with the protective bottle.

[0023] In the diagram: 1. Lead container; 2. Output cylinder; 201. Strip-shaped through hole; 202. Sealing plate; 202. Positioning groove; 203. Strip-shaped notch; 3. Protective bottle; 4. Positioning plate; 5. Magnet; 6. Mounting frame; 601. Mounting slot; 7. Can lid; 8. Medicine bottle; 9. Crank arm; 10. Reinforcing plate; 11. Mounting plate; 12. First motor; 13. Screw; 14. Threaded block; 15. Crank rod; 16. Sliding magnet; 17. Limiting partition; 17. Guide hole; 18. Belt conveyor assembly; 18. Bracket; 1801. Drive shaft; 1802. Second motor; 1803. Bearing plate; 19. Rotary column; 20. Support seat; 21. Moving assembly; 22. Bushing; 23. Lead door; 24. Handle; 25. Slide table; 26. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] It should be noted that similar labels 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.

[0027] Please see Figures 1-3 This invention provides a technical solution: a radiation protection device for radiotherapy drugs, which uses a lead container 1 as the core protective body to store radioactive drugs. Due to the bulkiness of the lead container 1, a moving assembly 22 is installed at the bottom of the lead container 1 to facilitate movement. The moving assembly 22 has several self-locking rollers to meet the requirements for overall transport and positioning of the device. More specifically, the top port of the lead container 1 is coaxially and slidably equipped with... Figures 4-6 The mounting frame 6 shown has multiple rows of mounting slots 601 arranged in a circular array at its bottom. Each mounting slot 601 is vertically fitted with a matching protective bottle 3. The protective bottles 3 are made of lead-sealed material depending on the radioactivity of the drug. Each protective bottle 3 can independently hold a vial 8 containing radiotherapy drugs. A cushioning and vibration-damping friction liner (not shown in the figure) can be installed between the vial 8 and the protective bottle 3. A magnet 5 is fixedly mounted on the outer wall of the protective bottle 3. The magnet 5 is preferably a samarium cobalt magnet with good radiation resistance, and neodymium iron boron magnets are avoided as much as possible. This provides a structural foundation for the long-term stability and reliability of subsequent magnetic attraction and repulsion operations. It can also be magnetically inserted into the mounting slot 601, further improving the reliability of the installation based on the tight fit with the mounting slot 601. The top port of the lead can 1 uses a detachable assembly structure for the can lid 7. After the can lid 7 is assembled, it can tightly press the mounting frame 6 above the positioning plate 4 to limit and fix the mounting frame 6, preventing displacement and shaking during operation. A cylindrical output cylinder 2 is coaxially fixed inside the lead container 1. The bottom of the output cylinder 2 is open, and the top is closed. The bottom port is located inside the lead container 1, and the top protrudes outside the top of the lead container 1. In actual manufacturing, multiple strip-shaped through holes 201 are arranged in a ring array on the side wall near the top of the output cylinder 2, for example... Figures 7-8 The diagram shows four strip-shaped through-holes 201, each hinged to an openable lead door 24. Each lead door 24 has a handle 25, and the opening and closing of the lead door 24 ensures radiation sealing protection after the protective bottle 3 is placed or removed. The bottom of the lead container 1 is equipped with a belt conveyor assembly 18 that allows for radial transport along the lead container 1. Figures 2-3The belt conveyor assembly 18 is driven by a vertically arranged rotating column 20, which can rotate and adjust its working position in the horizontal plane. Simultaneously, the rotating column 20 is also connected to a lead screw mechanism located above the can lid 7. This lead screw mechanism synchronously drives the electromagnet and the sliding magnet 16 to complete translational movements. During the rotation adjustment of the rotating column 20, the electromagnet and the belt conveyor assembly 18 always maintain a vertically aligned corresponding position, i.e., they are located above and below the corresponding row of protective bottles 3. In actual operation, after the lead screw mechanism drives the electromagnet to slide directly above the protective bottle 3 to be picked up or placed, it energizes the electromagnet to generate magnetic repulsion. During the energizing time, the magnetic repulsion drives the protective bottle 3 with the magnet 5 to fall downwards, smoothly landing on the surface of the belt conveyor assembly 18 below and pressing it onto the belt, preventing it from tipping over during the fall. Then, the belt conveyor assembly 18 starts operating, conveying the protective bottle 3 that has fallen above it to the bottom port of the output cylinder 2. Finally, the lead screw mechanism drives the sliding magnet 16 from, for example... Figure 3 As shown, the device retracts and moves to the center of the top of the output cylinder 2. At this point, the upward magnetic attraction of the sliding magnet 16 attracts and lifts the protective bottle 3 at the bottom port to the top of the output cylinder 2, achieving magnetic lifting for drug retrieval and completing the automated retrieval of the radiopharmaceutical protective bottle 3. The entire process is achieved through the lead container 1, output cylinder 2, and lead door 24, providing comprehensive radiation protection. Furthermore, it must be noted that the sliding magnet 16 has another crucial function. Based on the principle and effect described in the previous embodiment, it is easy to see that the sliding magnet 5 must have the opposite polarity to the electromagnet. Therefore, when the electromagnet is energized and repels and presses down on the protective bottle 3 below, the sliding magnet 16 attracts it, thus offsetting the repulsive force of the electromagnet on the adjacent protective bottle 3 to a certain extent, preventing the adjacent protective bottle 3 from accidentally falling and improving reliability. To fully utilize this effect, an auxiliary magnet with the same polarity as the sliding magnet 16 can be installed on the other side of the threaded block 14 to offset the magnetic repulsive force between two adjacent protective bottles 3 below the electromagnet.

[0028] In this embodiment, as Figures 1-3As shown, the screw mechanism is mounted above the can lid 7 and mainly consists of a screw 13, a threaded block 14, and a first motor 12 that drives the screw 13. The screw 13 is arranged horizontally radially along the lead can 1 and is mounted parallel to the area above the can lid 7. The threaded block 14 is threadedly connected to the screw 13, allowing the threaded block 14 to reciprocate along the axial direction of the screw 13. An electromagnet (not shown) is fixedly mounted on the threaded block 14. For example, the electromagnet is installed in the lower part of the threaded block 14 to be as close as possible to the protective bottle 3, and its position can be adjusted synchronously with the threaded block 14 to reach the corresponding protective bottle 3 in the corresponding column. Furthermore, a sliding magnet 16 is mounted on the top of the threaded block 14 via an integrally fixed crank 15. The crank 15 provides stable connection and synchronous transmission, ensuring that the sliding magnet 16 and the electromagnet maintain synchronous translation. Specifically, the top of the output cylinder 2 is equipped with a sealing plate 202 structure, and the bottom surface of the sliding magnet 16 slides and adheres to the top surface of the sealing plate 202, allowing it to slide smoothly along the surface of the sealing plate 202. The sealing plate 202 provides sliding support and limit, ensuring the stability of the sliding magnet 16 during translation and precisely cooperating with the adsorption and lifting operation of the protective bottle 3 below.

[0029] In this embodiment, as Figures 2-3 As shown, the rotating column 20 can be a stepped shaft, lifting and bearing, and is rotatably installed at the bottom of the lead tank 1 using a coaxial through-mount assembly. Driven by a third motor (not shown in the figure) vertically installed inside the moving component, it can rotate stably around its own axis. The rotating column 20 extends to the side wall on the outer side of the bottom of the lead tank 1, where an L-shaped curved arm 9 is specially fixedly mounted. The curved arm 9 rotates synchronously with the rotating column 20. This curved arm 9 provides a mounting carrier for the first motor 12 and the screw 13. The first motor 12 is fixedly mounted on one side of the top of the curved arm 9, and the screw 13 is rotatably mounted on the other side. The screw 13 can be rotatably mounted. The power output end of the first motor 12 is matched and driven by the screw 13. Relying on the overall structure of the curved arm 9, the screw 13, the first motor 12 and the rotating column 20 are linked and coordinated, ensuring that when the rotating column 20 rotates to adjust its position, the screw mechanism can adjust synchronously, maintaining the alignment accuracy between the electromagnet and the belt conveyor assembly 18.

[0030] In this embodiment, as Figures 1-3A triangular reinforcing plate 10 is welded to the top side wall of the vertical section of the crank arm 9. The stability of the triangular structure enhances the overall structural strength of the crank arm 9, preventing deformation and swaying during long-term rotation and transmission operations. A mounting plate 11 extends horizontally from the outer side of the reinforcing plate 10. The mounting plate 11 is a horizontally fixed structure, and the first motor 12 is fixedly mounted on the surface of the mounting plate 11 using fasteners, achieving stable and limited installation of the first motor 12. The main shaft of the first motor 12 passes through the vertical section of the crank arm 9 and rotates in coordination with the vertical section. The protruding end of the main shaft is coaxially and fixedly connected to the screw 13, ensuring that the power output from the first motor 12 is transmitted to the screw 13, driving the screw 13 to rotate stably in both directions, thus ensuring the sliding transmission of the screw mechanism.

[0031] In this embodiment, as Figures 2-3 As shown, a slide 26 structure is fixedly mounted at the bottom of the end of the screw 13 near the first motor 12. The bottom surface of the slide 26 slides and contacts the top surface of the can cover 7, forming a sliding support for the end of the screw 13 and reducing the suspension deformation of the screw 13 during operation. Figure 9 and Figure 10 A bushing 23 is fixedly mounted on the other end of the screw 13 away from the first motor 12. The bushing 23 is mounted on the outer wall of the output cylinder 2 exposed to the can cover 7 by means of rotational sleeve connection. The bushing 23 realizes the rotation limit and support of the end of the screw 13, so that both ends of the screw 13 are effectively supported, which greatly improves the stability of the screw 13 during operation, avoids jamming and offset when the screw 13 rotates and the threaded block 14 slides, and ensures the overall smooth operation of the screw mechanism.

[0032] In this embodiment, as Figure 3 As shown, the belt conveyor assembly 18 is equipped with two sets of drive shafts 1802. The two drive shafts 1802 are rotatably mounted on a horizontally arranged support plate 19 via dedicated brackets 1801. A conveyor belt is fitted around the outside of each drive shaft 1802, forming a complete belt conveyor structure. A second motor 1803 is fixedly mounted at the end of one drive shaft 1802. The second motor 1803 serves as a power source, driving the drive shaft 1802 to rotate, thus driving the conveyor belt to transport the protective bottle 3. The support plate 19 serves as a horizontal support base. A rotating column 20 is vertically fixedly connected to the bottom of one end of the support plate 19. The rotating column 20 drives the entire support plate 19 and the belt conveyor assembly 18 above it to rotate synchronously. The second motor 1803 is also mounted on the support plate 19. A support base 21 is fixedly mounted at the bottom of the other end of the support plate 19. The bottom surface of the support base 21 slides in contact with the inner bottom surface of the lead container 1, providing auxiliary support and sliding limit for the support plate 19, balancing the overall structural stress, and ensuring the stability of the belt conveyor assembly 18 during rotation and conveying operations.

[0033] In this embodiment, as Figures 2-3A positioning and guiding structure for the falling protective bottle 3 is added. Specifically, a positioning plate 4 is horizontally fixed inside the lead container 1 near the upper end. The positioning plate 4 is coaxial with the lead container 1, and multiple vertically penetrating insertion holes are arranged in a circular array on its body. The arrangement and number of insertion holes are aligned vertically with the placement groove 601 at the bottom of the placement frame 6. When the electromagnet is energized, it generates a magnetic repulsion force relative to the magnet 5 on the protective bottle 3, automatically pushing the protective bottle 3 downwards from the placement groove 601. The protective bottle 3 can pass through the corresponding insertion hole, and the vertical guiding effect of the insertion hole limits the offset and swaying of the protective bottle 3, allowing it to fall vertically and smoothly onto the surface of the belt conveyor assembly 18 below. Under the downward pressure of the magnetic repulsion force, it remains stably on the belt conveyor assembly 18, awaiting activation. This effectively improves the reliability of the automatic release and rotation of the protective bottle 3, preventing tilting or misalignment of the protective bottle 3 from affecting subsequent conveying operations.

[0034] In this embodiment, as Figure 2 , Figure 3 As shown, a layered guide structure is further added. A guide partition is set below the positioning plate 4. The guide partition is coaxially fixed inside the lead container 1, maintaining coaxiality with the positioning plate 4 and the mounting frame 6. Multiple guide holes 1701 extending radially are arranged in a ring array on the guide partition. The position of each guide hole 1701 corresponds vertically to the single row of protective bottles 3 above, forming a vertically connected guide channel. After the protective bottle 3 falls downward through the insertion hole of the positioning plate 4, it can fall directly into the corresponding guide hole 1701. The guide hole 1701 can provide secondary limiting and guidance for the falling protective bottle 3. At the same time, as the belt conveyor assembly 18 rotates with the rotating column 20 and moves the protective bottle 3, the radial guidance effect of the guide hole 1701 guides the protective bottle 3 to move smoothly to the bottom port position of the output cylinder 2, avoiding the protective bottle 3 from deviating or getting stuck throughout the process, further improving the stability of the equipment operation.

[0035] In this embodiment, as Figure 2 and Figure 3 , Figure 7 As shown, multiple strip-shaped notches 203 are arranged in a ring array on the side wall of the bottom port of the output cylinder 2. The number and spacing of the strip-shaped notches 203 correspond one-to-one with the placement and removal positions of the single row of protective bottles 3 in the device, respectively adapting to each row of protective bottles 3 entering the output cylinder 2 along with the belt conveyor assembly 18, providing clearance for the protective bottles 3 to enter the bottom of the output cylinder 2. This design can extend the output cylinder 2, allowing the bottom port of the output cylinder 2 to be close to the belt surface or the upper surface of the guide partition. Because corresponding strip-shaped notches 203 are used for the protective bottles 3 to enter, the diameter of the output cylinder 2 will be larger, and the protective bottles 3 will not slide against the cylinder wall of the output cylinder 2. In order to ensure that the protective bottles 3 are attracted to a fixed position after moving up under magnetic attraction, this embodiment specifically adopts the following overall design: Figure 12 The truncated cone structure design shown allows the top of the protective bottle 3 to be adaptively and adjustably inserted into the positioning groove 20201 located in the center of the top surface of the output cylinder 2 when the sliding magnet 16 magnetically attracts the protective bottle 3 and moves upward. This is achieved through... Figure 13 The positioning groove 20201 shown is used to position the top of the protective bottle 3, ensuring that the position of the protective bottle 3 remains constant after it is lifted, so that it can be easily removed by manual labor or equipment from the strip-shaped through hole 201.

[0036] More specifically, this implementation also includes a supporting controller for automatic control. This controller establishes electrical control connections with the electromagnet, first motor 12, second motor 1803, and third motor within the device, enabling unified control of the start / stop, running time, and forward / reverse rotation of each electrical component. The specific control logic consists of three steps. First, when a medicine bottle 8 needs to be removed from the lead container 1, the controller first controls the third motor to start operating, driving the rotating column 20 to rotate the entire belt conveyor assembly 18 in the horizontal plane, precisely adjusting it to be directly below the corresponding protective bottle 3 to be removed, completing the alignment preparation for medicine removal. Second, after alignment is completed, the controller starts the first motor 12, driving the screw 13 of the lead screw mechanism to rotate, causing the threaded block 14 and the electromagnet at the bottom to move horizontally until the electromagnet precisely slides to the position directly above the corresponding protective bottle 3, for example, moving to... Figure 3At the indicated position, the controller then energizes the electromagnet and maintains it for a set duration, typically 1-3 seconds. Using magnetic repulsion, the protective bottle 3 with magnet 5 is pushed downwards from the placement slot 601 of the placement rack 6. Under magnetic repulsion pressure, the protective bottle 3 smoothly falls onto the surface of the belt conveyor assembly 18 through the insertion hole and guide hole 1701. After the bottle 8 automatically falls from the placement rack 6, the controller starts the second motor 1803 to drive the belt conveyor assembly 18, smoothly transporting the protective bottle 3 to below the lower port of the output cylinder 2. Alternatively, if the aforementioned strip-shaped notch 203 is provided, the bottle 3 enters the lower port of the output cylinder 2 through the notch 203. Then, the controller controls the first motor 12 to rotate in reverse, driving the threaded block 14 and the sliding magnet 16 to retract and translate, causing the sliding magnet 16 to return to the center position at the top of the output cylinder 2. Through the upward magnetic attraction of the sliding magnet 16, the protective bottle 3 in the bottom port of the output cylinder 2 is pulled upwards, completing the automated removal operation of a single radioactive drug protective bottle 3. The protective device in this embodiment is fully automated, easy to operate, and has high radiation protection safety. It can realize centralized storage and protection of different types or specifications of radiopharmaceuticals, as well as protection during the automatic positioning and retrieval process. Unlike traditional lead containers, which require the lead container to be completely opened every time a radiopharmaceutical is retrieved, thus frequently and fully exposing all radiopharmaceuticals and causing a great risk of radiation leakage, the radiopharmaceutical radiation protection device in the above embodiment not only realizes the automatic retrieval of the target drug, but also only temporarily opens the corresponding lead door 24 during the entire retrieval process. Compared with the complete exposure of the entire lead container, the exposure area is greatly reduced, and the exposure time is also greatly shortened.

[0037] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for 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 the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A radiation protection device for a radiotherapy drug, comprising a lead container (1) and a movable component (22) installed at the bottom of the lead container (1), characterized in that: A mounting frame (6) is coaxially and slidably inserted into the top port of the lead container (1). The bottom end of the mounting frame (6) has several rows of annular array mounting slots (601). A protective bottle (3) is vertically inserted into the mounting slots (601). A medicine bottle (8) containing radiopharmaceuticals is installed inside the protective bottle (3). A magnet (5) is fixed to the protective bottle (3). A lid (7) is detachably covered on the top port of the lead container (1). The lid (7) presses the mounting frame (6) against the positioning plate (4). A cylindrical output cylinder (2) is also coaxially installed inside the lead container (1). The bottom end of the output cylinder (2) is open and the top end is closed. Several strip-shaped through holes (201) for the protective bottle (3) to be taken out are arranged in annular array on the side wall of the output cylinder (2) near the top end. Each strip-shaped through hole (201) is hinged with a lead door (24). The bottom of the lead can (1) is equipped with a belt conveyor assembly (18) that conveys radially along the lead can (1). The belt conveyor assembly (18) is driven to rotate in the horizontal plane by a rotating column (20). The rotating column (20) is also connected to a screw mechanism for driving the electromagnet and the sliding magnet (16) located above the can lid (7) to move synchronously. When the rotating column (20) rotates, the electromagnet and the belt conveyor assembly (18) are always arranged vertically opposite each other so that when the electromagnet slides on the screw of the screw mechanism to the top of the corresponding protective bottle (3) and is energized, the protective bottle (3) is repelled and falls onto the belt conveyor assembly (18). When the belt conveyor assembly (18) is running, it can transport the protective bottle (3) to the bottom port of the output cylinder (2) so that the sliding magnet (16) at the top center of the output cylinder (2) is pulled upwards to the top of the output cylinder (2).

2. The radiation protection device for radiotherapy drugs according to claim 1, characterized in that: The lead screw mechanism includes a screw (13), a threaded block (14), and a first motor (12) for driving the screw (13) to rotate. The screw (13) is located above the can cover (7) and arranged radially along the lead can (1). The threaded block (14) is threaded onto the screw (13). The electromagnet is fixed on the threaded block (14), and the sliding magnet (16) is fixed to the top of the threaded block (14) by a crank (15). The sliding magnet (16) can slide on the sealing plate (202) at the top of the output cylinder (2).

3. The radiation protection device for radiotherapy drugs according to claim 2, characterized in that: The rotating column (20) rotatably passes through the bottom of the lead can (1) on the same axis, and an L-shaped curved arm (9) is fixed on the side wall outside the bottom of the lead can (1). The first motor (12) is fixed on one side of the top of the curved arm (9), and the screw (13) is rotatably installed on the other side.

4. The radiation protection device for radiotherapy drugs according to claim 3, characterized in that: A triangular reinforcing plate (10) is fixed to the side wall of the vertical section of the crank arm (9). A mounting plate (11) is horizontally fixed on the reinforcing plate (10). The first motor (12) is fixed on the mounting plate (11). The main shaft of the first motor (12) rotates through the vertical section and is fixed coaxially with the screw (13).

5. The radiation protection device for radiotherapy drugs according to claim 3, characterized in that: The screw (13) has a slide (26) fixed at the bottom of one end near the first motor (12), and the slide (26) slides in contact with the top surface of the can lid (7); the other end of the screw (13) has a bushing (23) fixed, and the bushing (23) rotates and fits onto the output cylinder (2) where it protrudes from the can lid (7).

6. The radiation protection device for radiotherapy drugs according to claim 1, characterized in that: The two drive shafts (1802) of the belt conveyor assembly (18) are rotatably mounted on a horizontally set support plate (19) via brackets (1801). A second motor (1803) is fixed to the end of one of the drive shafts (1802). The rotating column (20) is vertically fixed at the bottom of one end of the support plate (19), and a support base (21) is fixed at the bottom of the other end. The bottom of the support base (21) slides in contact with the inner bottom surface of the lead can (1).

7. The radiation protection device for radiotherapy drugs according to claim 1, characterized in that: A positioning plate (4) is horizontally fixed at the upper end inside the lead can (1). The positioning plate (4) has several vertically arranged insertion holes arranged in a ring array. The placement groove (601) is directly opposite the insertion holes, so that when the protective bottle (3) is pushed downwards, it is guided by the insertion holes and falls smoothly onto the belt conveyor assembly (18).

8. The radiation protection device for radiotherapy drugs according to claim 7, characterized in that: Below the positioning plate (4) is a guide partition that is coaxially fixed inside the lead can (1). The guide partition has a ring array of several guide holes (1701) arranged radially therein. Each guide hole (1701) is opposite to a row of protective bottles (3) above it, so that after the protective bottle (3) passes through the insertion hole and falls into the guide hole (1701), it can be guided by the guide hole (1701) and moved to the bottom port of the output cylinder (2) by the belt conveyor assembly (18).

9. The radiation protection device for radiotherapy drugs according to claim 1, characterized in that: The bottom port of the output cylinder (2) has a ring array of several strip-shaped notches (203) on its side wall. Each strip-shaped notch (203) is used to take out a column of protective bottles (3). The top of the protective bottle (3) has a truncated cone structure that is smaller at the top and larger at the bottom, so that when the protective bottle (3) is magnetically attracted and moved upward, the top of the protective bottle (3) is inserted into the positioning groove (20201) in the center of the top surface of the output cylinder (2).

10. The radiation protection device for radiotherapy drugs according to claim 1, characterized in that: It also includes a controller for controlling the electromagnets and all motors, the control logic of which is as follows: S1. Start the third motor of the drive column (20) to make the column (20) rotate with the belt conveyor assembly (18) to the bottom of the corresponding column of protective bottle (3); S2. Start the first motor (12) to move the threaded block (14) directly above the corresponding protective bottle (3), and then energize the electromagnet for a set time to push the protective bottle (3) down from the mounting frame (6) and onto the belt conveyor assembly (18); S3. Start the second motor (1803) to allow the belt conveyor assembly (18) to transfer the protective bottle (3) on its surface to the lower port of the output cylinder (2), and then start the first motor (12) to reverse the sliding magnet (16) back to the position of the top center of the output cylinder (2) to suck out the protective bottle (3) upwards.

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