Automatic radioactive seed loading system

Abstract

The application discloses a kind of radioactive seed automatic loading system, the system includes sequencing module and clip feed assembly;Sequencing module includes vibrating hopper, vibrating hopper includes discharge port, sequencing module is used to sort and send radioactive seed poured into vibrating hopper to discharge port;Clip feed assembly includes clip holder, clip holder is fixedly installed at the discharge port of vibrating hopper;Clip is clamped on the side wall of the side of clip holder away from vibrating hopper;Clip holder is provided with only through one radioactive seed radioactive seed feeding channel, the opening of one end of radioactive seed feeding channel is connected with the discharge port of vibrating hopper, the other end bottom of radioactive seed feeding channel is provided with bullet entry channel, bullet entry channel is connected with the bullet entry port of clip;The radioactive seed automatic loading system can load radioactive seed into the clip of protective device.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically to an automated loading system for loading radioactive particles into a magazine of a protective device. Background Technology

[0002] With the development of interventional radiology, radiotherapy for tumors is becoming increasingly widespread. Directing radioactive seed sources to the tumor site for radiotherapy has become an effective clinical treatment for malignant tumors. Using radioactive seeds to target lesions inhibits or slows their growth, thus reducing the systemic impact of radioactive seeds while achieving better therapeutic results. However, in the process of using radioactive seeds to treat tumors, medical personnel typically use forceps to manually load the radioactive seeds into clips and then push them into the tumor tissue under the guidance of a radioactive seed protector. This manual loading method has significant drawbacks and safety risks. Loading radioactive seeds is inconvenient, inefficient, and can negatively impact the health of medical personnel.

[0003] Chinese utility model patent CN210992673U discloses a vibratory feeding type automatic radioactive grain filling device, comprising: a box body, a grain sorting part, and a clip feeding part; the grain sorting part includes a circumferential electromagnetic vibrator, a vibratory plate, and a vibratory plate baffle; the clip feeding part includes a clip tray connecting block and a clip tray; the vibratory plate is mounted on the vibratory plate connecting plate of the circumferential electromagnetic vibrator, the clip tray connecting block is fixedly mounted at the discharge port of the vibratory plate, the inlet of the clip tray connecting block is aligned with the discharge port of the vibratory plate, a vibratory plate channel is provided on the inner side wall of the vibratory plate, the end of the vibratory plate channel can only allow one radioactive grain to pass through, the clip is inserted into the clip tray, the clip tray is inserted into the clip tray connecting block, and the upper surface of the clip tray connecting block has a radioactive grain channel that allows only one grain to pass through at a time. This device can improve the filling efficiency of radioactive grains and reduce the operator's contact with radioactive grains.

[0004] However, this device has the following problems:

[0005] 1. The magazine mounting structure is complex. A dovetail coupling structure is used to connect the magazine tray connecting block and the magazine tray. However, the dovetail coupling structure is complex, requires high machining accuracy, and has high manufacturing cost. At the same time, in order to ensure the connection accuracy, the gap between the dovetail groove and the dovetail slider is very small, which makes the installation of the dovetail coupling structure time-consuming and unsuitable for structures that are frequently disassembled.

[0006] 2. When using a vibrating hopper for loading, not all radioactive particles can be loaded. The last few radioactive particles will vibrate in place on the discharge channel instead of moving forward, resulting in not all radioactive particles entering the magazine.

[0007] 3. The number of radioactive particles entering the magazine cannot be precisely controlled. When the number of radioactive particles in the magazine reaches the set number, the power supply to the vibrating hopper is cut off. At this time, the radioactive particles in the discharge channel will still move forward due to inertia, resulting in the number of radioactive particles in the magazine being greater than the set number. Summary of the Invention

[0008] Purpose of the invention: The technical problem to be solved by the present invention is to provide an automatic loading system for radioactive grains, addressing the shortcomings of the prior art.

[0009] To address the aforementioned technical problems, this invention discloses an automatic loading system for radioactive grains, which includes a sorting module and a magazine feeding assembly.

[0010] The sorting module includes a vibrating hopper, which has a discharge port. The sorting module is used to sort the radioactive grains poured into the vibrating hopper and send them to the discharge port.

[0011] The magazine feeding assembly includes a magazine holder, which is fixedly installed at the discharge port of the vibrating hopper; the magazine is engaged with the side wall of the magazine holder facing away from the vibrating hopper; the magazine holder is provided with a radioactive grain feeding channel that allows only one radioactive grain to pass through, one end of the radioactive grain feeding channel is connected to the discharge port of the vibrating hopper, and the bottom of the other end of the radioactive grain feeding channel is provided with a magazine inlet channel, which is connected to the magazine inlet.

[0012] Furthermore, the magazine holder also includes a ramp, which is located at one end of the radioactive grain feed channel near the discharge port of the vibrating hopper. The ramp extends downward from the radioactive grain feed channel into the vibrating hopper. The length d of the top edge of the ramp is greater than twice the length of the radioactive grain. The distance L1 between the top edge of the ramp and the bottom of the radioactive grain feed channel is 0 to 0.2 mm larger than the radius of the radioactive grain.

[0013] Furthermore, the radioactive grain feeding channel is a groove formed on the top surface of the magazine holder; the magazine feeding assembly also includes a protective cover, the protective cover including a covering part and a stop part connected to the end of the covering part near the discharge port, the bottom surface of the covering part covering the radioactive grain feeding channel; the stop part is located above the side of the radioactive grain feeding channel away from the vibrating hopper; the stop part includes a first side face, the first side face extending upward from the edge of the radioactive grain feeding channel away from the vibrating hopper; the distance between the end face of the covering part near the discharge port and the discharge port is less than or equal to the top edge length d of the slope, and greater than twice the length of the radioactive grain.

[0014] Specifically, the width b of the radioactive particle feeding channel is 0.1 to 0.2 mm larger than the diameter of the radioactive particle.

[0015] Specifically, the depth h of the radioactive particle feeding channel is greater than one time the diameter of the radioactive particle and less than twice the diameter of the radioactive particle.

[0016] Furthermore, the system also includes a counting module, which includes an optical fiber sensor and a counter electrically connected to the optical fiber sensor. The optical fiber sensor is mounted on the side of the magazine holder. The optical fiber sensor is located above the magazine inlet. The vertical distance e from the center of the optical fiber sensor to the bottom of the radioactive particle feeding channel is 0.9 to 1.1 times the radius of the radioactive particle. The vertical distance f from the center of the optical fiber sensor to the inner wall of the feeding channel near the vibrating hopper is 0.3 to 0.5 times the length of the radioactive particle. The optical fiber sensor generates a sensing signal to the counter for each radioactive particle it senses. The counter counts the number of received sensing signals in real time.

[0017] Furthermore, the system also includes a controller and an electromagnet push rod, both of which are electrically connected to the controller. The push rod of the electromagnet push rod is positioned directly opposite the radioactive seed feed channel. The distance between the push rod of the electromagnet push rod and the center position of the fiber optic sensor is 1.3 to 1.7 times the length of the radioactive seed. When the number of signals sensed by the fiber optic sensor reaches its set value, the counter sends a signal, and upon receiving the signal, the controller drives the push rod of the electromagnet push rod to move downwards to stop the radioactive seed from moving towards the magazine's feed port.

[0018] Furthermore, the system also includes a housing assembly; the housing assembly includes a housing body and a touch screen; the sorting module and the magazine feeding assembly are both installed inside the housing body; one side of the housing body is provided with a leaded glass door for opening or closing the housing body, the leaded glass door being used to place or remove magazines; the top of the housing body is provided with a leaded glass cover for opening or closing the housing body, the leaded glass cover being used to pour radioactive particles into the sorting module; the touch screen is located in the top area of ​​the housing body next to the leaded glass cover, and the touch screen is electrically connected to the controller.

[0019] Furthermore, the end of the radioactive grain feed channel near the vibrating hopper is higher than the end of the radioactive grain feed channel near the magazine.

[0020] Specifically, the magazine holder includes a magazine mounting groove, which is formed on the side wall of the magazine holder away from the vibrating hopper; the magazine is embedded in the magazine mounting groove; the two opposite side walls of the magazine mounting groove are interference-fitted with the upper part of the magazine.

[0021] Beneficial effects:

[0022] (1) This application sets the clip to be inserted into the clip mounting groove of the clip holder from the side of the clip holder away from the vibrating hopper. At the same time, the two side walls of the clip mounting groove are respectively arranged to be interference-fitted with the upper part of the clip so that the clip and the clip holder are engaged. When the vibrating hopper is working, the vibrating hopper torsional vibration about its vertical axis, which generates a force on the clip in the horizontal plane along the tangential direction of the line connecting the clip and the axis of the vibrating hopper. In this process, the two side walls of the clip mounting groove respectively apply a reaction force to the clip to cancel out the force it receives, so that the clip is stably installed in the clip holder without the need for additional fastening devices. In the prior art, the clip tray containing the clip is installed on the clip tray connecting block along the tangential direction of the vibrating hopper through a dovetail groove structure. The clip tray and the clip tray connecting block are positioned and fixed by magnets. In comparison, the clip installation structure of this application is simple, the clip mounting groove is easy to process, and the clip is engaged in the clip mounting groove, which is easy to install and does not require additional fastening devices.

[0023] (2) This application sets a ramp at one end of the radioactive grain feed channel near the discharge port of the vibrating hopper. The ramp extends downward from the radioactive grain feed channel into the vibrating hopper. When multiple radioactive grains are stacked, the grains above the bottom radioactive grain will slide down the ramp back into the vibrating hopper, thereby ensuring that at most one radioactive grain can be stably placed in the height direction of the radioactive grain feed channel, thus ensuring that only one radioactive grain passes through the counting module at any given time.

[0024] (3) This application has a counting module, which includes an optical fiber sensor and a counter electrically connected to the optical fiber sensor. By setting the optical fiber sensor above the feed port of the magazine, the vertical distance e from the center of the optical fiber sensor to the bottom of the radioactive grain feed channel is 0.9 to 1.1 times the radius of the radioactive grain, and the vertical distance f from the center of the optical fiber sensor to the inner wall of the feed channel near the vibrating hopper is 0.3 to 0.5 times the length of the radioactive grain, it is ensured that the radioactive grains irradiated by the light spot of the optical fiber sensor will fall into the magazine, thereby achieving accurate counting by the counting module.

[0025] (4) This application has a seed stop module, which includes an electromagnet push rod. The push rod of the electromagnet push rod is positioned directly opposite the radioactive seed feed channel. The distance between the push rod of the electromagnet push rod and the center position of the fiber optic sensor is 1.3 to 1.7 times the length of the radioactive seed. When the number of sensing signals from the fiber optic sensor reaches its set value, the counter sends a signal. After receiving the signal, the controller drives the push rod of the electromagnet push rod to move down quickly to close the radioactive seed feed channel. This stops the radioactive seeds located directly below the push rod of the electromagnet push rod and the subsequent radioactive seeds from continuing to move toward the magazine's feed port due to inertia, thereby ensuring that the count value of the counting module is consistent with the actual number of radioactive seeds entering the magazine.

[0026] (5) This application solves the problem that the last few radioactive grains cannot all enter the magazine because the radioactive grain feed channel vibrates in place on the radioactive grain feed channel during the loading process of the prior art. The end of the radioactive grain feed channel near the vibrating hopper is higher than the end of the radioactive grain feed channel near the magazine. Attached Figure Description

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0028] Figure 1 This is a three-dimensional structural diagram of the outer shell assembly of an automatic loading system for radioactive grains provided in this application;

[0029] Figure 2 yes Figure 1 The diagram shows the internal structure of an automatic loading system for radioactive grains.

[0030] Figure 3 yes Figure 1 The diagram shows a three-dimensional representation of the internal structure of an automatic radioactive grain loading system. Figure 1 ;

[0031] Figure 4 yes Figure 1The diagram shows a three-dimensional representation of the internal structure of an automatic radioactive grain loading system. Figure 2 ;

[0032] Figure 5 yes Figure 1 The image shows a front view of the internal structure of an automated radioactive grain loading system.

[0033] Figure 6 yes Figure 5 A top view of the internal structure of an automated radioactive grain loading system is shown.

[0034] Figure 7 This is a three-dimensional structural diagram of the magazine holder of an automatic loading system for radioactive grains provided in this application, viewed from top angle.

[0035] Figure 8 This is a three-dimensional structural diagram of an automatic loading system for radioactive grains provided in this application, comprising a magazine holder, a protective cover, a magazine, a fiber optic sensor mounting base, a fiber optic sensor, an electromagnet push rod, and an electromagnet push rod mounting base assembled into one unit.

[0036] Figure 9 yes Figure 8 The diagram shows a front view of the integrated structure of an automatic radioactive grain loading system, comprising a magazine holder, a protective cover, a magazine, a fiber optic sensor mounting base, a fiber optic sensor, an electromagnet push rod, and an electromagnet push rod mounting base.

[0037] Figure 10 yes Figure 9 The AA section view shown.

[0038] Figure 11 yes Figure 10 The BB cross-sectional view shown.

[0039] Figure 12 yes Figure 9 The rear view of the assembled structure shown.

[0040] Figure 13 This is a three-dimensional structural diagram of the magazine of an automatic loading system for radioactive grains provided in this application, viewed from the main perspective.

[0041] Figure 14 yes Figure 13 The diagram shows a three-dimensional structure of the magazine from the rear view angle.

[0042] Figure 15 yes Figure 13 The top view of the magazine shown.

[0043] Figure 16 yes Figure 15 The shown is a CC cross-sectional view of the magazine.

[0044] Figure 17 yes Figure 10 The magazine holder shown.

[0045] Figure 18 This is the first settings interface of a touch screen in an automatic loading system for radioactive grains, as provided in one embodiment of this application.

[0046] Figure 19 This is the second settings interface of a touch screen in an automatic loading system for radioactive grains, as provided in one embodiment of this application.

[0047] Figure 20 This is the third settings interface of a touch screen in an automatic loading system for radioactive grains, as provided in one embodiment of this application.

[0048] Figure 21 This is the fourth settings interface of a touch screen in an automatic loading system for radioactive grains, as provided in one embodiment of this application. Detailed Implementation

[0049] The reference numerals in the accompanying drawings of this application are as follows:

[0050] The components include: outer casing assembly 10, outer casing body 101, base 11, lead glass door 12, lead glass cover plate 13, sorting module 20, vibrating hopper 21, magazine holder 22, radioactive grain feeding channel 221, feed channel 222, magazine mounting slot 223, opening slot 224, ramp 225, protective cover 23, covering part 231, stop part 232, first side facade 233, end face 234, counting module 30, fiber optic sensor mounting base 31, fiber optic sensor 32, grain stop module 40, electromagnet push rod mounting base 41, electromagnet push rod 42, touch screen 51; magazine 60, feed port 601, closed slot 602, grain outlet 603, protective strip 61, radioactive grain 70.

[0051] The technical solution of this application will now be described in detail with reference to the accompanying drawings.

[0052] like Figures 1 to 6 As shown, this application provides an automatic loading system for radioactive grains. The system includes a housing assembly 10, a sorting module 20, a counting module 30, a grain stop module 40, and a control module. Figure 1 and Figure 2As shown, the outer casing assembly 10 includes a base 11 and a casing body 101 supported on the base 11. The sorting module 20, the counting module 30, and the seed stop module 40 are all installed inside the casing body 101. A leaded glass door 12 is provided on one side of the casing body 101 for opening or closing the casing body 101. The leaded glass door 12 is used to place or remove the magazine 60, and the transparent leaded glass door 12 allows the operator to observe the state of the radioactive seeds 70 inside the magazine 60. A leaded glass cover 13 is provided on the top of the casing body 101 for opening or closing the casing body 101. The leaded glass cover 13 is used to pour the radioactive seeds 70 into the sorting module 20, and the transparent leaded glass cover 13 allows the operator to observe the state of the radioactive seeds 70 in the sorting module 20.

[0053] like Figure 2 As shown, the sorting module 20 includes a vibrating hopper 21, which has a discharge port. When the vibrating hopper 21 is working, it performs a torsional vibration around its vertical axis, sorting the poured radioactive grains 70 and sending them to the discharge port. The specific structural principle of the sorting module 20 is existing technology.

[0054] like Figure 2 As shown, the magazine feeding assembly includes a magazine holder 22, which is fixedly installed at the discharge port of the vibrating hopper 21. Figure 7 As shown, a magazine mounting groove 223 is formed on the side wall of the magazine holder 22 opposite to the vibrating hopper 21, and the magazine 60 is embedded in the magazine mounting groove 223. The magazine holder 22 can be made of plastic. The two opposite side walls of the magazine mounting groove 223 are interference-fitted with the upper part of the magazine 60, so that the magazine 60 is engaged with the magazine holder 22. Preferably, the distance between the two opposite side walls of the magazine mounting groove 223 is 0.01 to 0.05 mm smaller than the upper width dimension g of the magazine 60.

[0055] like Figure 7 and Figure 11 As shown, the magazine holder 22 is provided with a radioactive seed feed channel 221 through which only one radioactive seed 70 passes. Figures 8 to 11 As shown, one end of the radioactive grain feed channel 221 is connected to the discharge port of the vibrating hopper 21, and the other end of the radioactive grain feed channel 221 is provided with a projectile feeding channel 222, which is connected to the projectile feeding port 601 of the magazine 60.

[0056] This application involves embedding a clip 60 into the clip mounting groove 223 of the clip holder 22 from the side of the clip holder 22 opposite to the vibrating hopper 21. Simultaneously, the oppositely positioned side walls of the clip mounting groove 223 are interference-fitted with the clip 60. When the vibrating hopper 21 operates, it undergoes torsional vibration around its vertical axis, generating a force on the clip 60 in the horizontal plane along the tangential direction of the line connecting the clip and the axis of the vibrating hopper 21. During this process, the side walls of the clip mounting groove 223 respectively exert reaction forces on the clip 60 to counteract the applied force, thereby ensuring the clip 60 is stably mounted within the clip holder 22.

[0057] Specifically, such as Figures 13 to 15 As shown, the magazine 60 has a rectangular feed port 601 for loading iodine-125 granules. The iodine-125 granules are 0.8 mm in diameter and 4.5 mm in length. Figure 15 As shown, the length m of the magazine 60's feed port 601 is 0-0.5 mm greater than the length of the radioactive seed 70, and the width n is 0-0.2 mm greater than the diameter of the radioactive seed 70. For example... Figure 10 As shown, the cross-sectional dimensions of the feed channel 222 are adapted to the dimensions of the feed port 601 of the magazine 60 so that the radioactive particles 70 can fall from the feed channel 222 into the magazine 60 through the feed port 601.

[0058] like Figures 13 to 15 As shown, a closed groove 602 penetrating the magazine 60 is provided on the outer side wall of the magazine 60. The closed groove 602 is elongated and extends along the length of the magazine 60. Figure 10 As shown, the width k of the closed groove 602 ranges from 0.1 to 0.5 mm, and is used to observe the state of the radioactive granules 70 inside the magazine 60, while preventing the radioactive granules 70 from slipping out of the closed groove 602. Figure 13 and Figure 14 As shown, a pair of opposing seed outlets 603 are provided on the two side walls at the bottom of the inner cavity of the magazine 60. The diameter q of the seed outlets 603 is 0-0.2 mm larger than the diameter of the radioactive seed 70. Figure 10 As shown, the magazine feed assembly also includes a protective strip 61. During installation, the protective strip 61 passes through the pellet outlet 603 of the magazine 60 to prevent the radioactive pellets 70 from slipping out of the magazine 60 during loading.

[0059] like Figure 10 As shown, the magazine holder 22 also includes a pair of oppositely arranged opening slots 224, which are located on both sides of the magazine mounting slot 223. During installation, the opening slots 224 are used to accommodate the portion of the protective strip 61 that protrudes from the magazine 60.

[0060] like Figures 8 to 10As shown, the system also includes a counting module 30 for recording the number of radioactive particles 70 entering the magazine 60. The counting module 30 includes a fiber optic sensor mounting base 31, a fiber optic sensor 32, and a counter electrically connected to the fiber optic sensor 32. The minimum detection size of the fiber optic sensor 32 should be smaller than the diameter of the radioactive particles 70. The fiber optic sensor 32 can be an Omron E32-C42S, with a minimum detectable object diameter of 0.1 mm. Figure 7 As shown, the magazine holder 22 also includes a mounting hole for mounting the fiber optic sensor mounting base 31, the mounting hole being located on the side of the magazine holder 22. Figure 8 and Figure 9 As shown, the fiber optic sensor 32 is mounted on the fiber optic sensor mounting base 31. Figure 10 As shown, the fiber optic sensor 32 is located above the magazine inlet 601 of the magazine 60. Figure 17 As shown, the vertical distance e from the center of the fiber optic sensor 32 to the bottom of the radioactive seed feed channel 221 is 0.9 to 1.1 times the radius of the radioactive seed 70. Simultaneously, as... Figure 17 As shown, the vertical distance f from the center of the fiber optic sensor 32 to the inner wall of the feed channel 222 near the vibrating hopper 21 is 0.3 to 0.5 times the length of the radioactive seed 70, ensuring that the radioactive seed 70 irradiated by the light spot of the fiber optic sensor 32 will definitely fall into the magazine 60. Each time the fiber optic sensor 32 senses a radioactive seed 70, it generates a sensing signal to the counter, which counts the number of received sensing signals in real time.

[0061] like Figure 6 As shown, the magazine holder 22 also includes a ramp 225, which is located at one end of the radioactive grain feed channel 221 near the discharge port of the vibrating hopper 21. The ramp 225 extends downward from the radioactive grain feed channel 221 into the interior of the vibrating hopper 21. Figure 17 As shown, the length d of the top edge of the ramp 225 is greater than twice the length of the radioactive seed 70. The distance L1 between the top edge of the ramp 225 and the bottom of the radioactive seed feed channel 221 is 0–0.2 mm larger than the radius of the radioactive seed 70. Figure 8 As shown, by setting the ramp 225, when multiple radioactive particles 70 are stacked, the particles above the bottom radioactive particle 70 will slide down the ramp 225 back into the vibrating hopper 21, thereby ensuring that at most one radioactive particle 70 can be stably placed in the height direction of the radioactive particle feeding channel 221, thus ensuring that only one radioactive particle 70 passes through the counting module 30 at any given time.

[0062] like Figure 12 As shown, the inclination angle β of slope 225 can range from 120° to 150°.

[0063] like Figure 7 As shown, the radioactive particle feed channel 221 can be formed in a groove on the top surface of the magazine holder 22. Figure 8 As shown, the magazine feeding assembly also includes a protective cover 23, which includes a covering portion 231 and a stop portion 232 connected to the end of the covering portion 231 near the discharge port. The bottom surface of the covering portion 231 covers the radioactive grain feeding channel 221. The stop portion 232 is located above the side of the radioactive grain feeding channel 221 away from the vibrating hopper 21. Figure 12 As shown, the stop portion 232 includes a first side surface 233, which extends upward from the edge of the radioactive grain feed channel 221 away from the vibrating hopper 21 to prevent the radioactive grains 70 stacked above from rolling off the outside of the vibrating hopper 21. Figure 8 As shown, the distance between the end face 234 of the cover 231 near the discharge port and the discharge port is less than or equal to the top edge length d of the slope 225, and greater than twice the length of the radioactive grain 70.

[0064] like Figure 12 As shown, the width b of the radioactive particle feeding channel 221 is 0.1 to 0.2 mm larger than the diameter of the radioactive particle 70.

[0065] like Figure 11 As shown, the depth h of the radioactive seed feeding channel 221 is greater than one times the diameter of the radioactive seed 70 but less than twice the diameter of the radioactive seed 70. This is to ensure that there is only one radioactive seed 70 in the height direction of the radioactive seed feeding channel 221, so as to avoid counting errors caused by multiple radioactive seeds 70 overlapping in the height direction passing through the counting module 30 at the same time.

[0066] In this application, the control module includes a controller. For example... Figure 8 As shown, the grain stop module 40 includes an electromagnet push rod 42 and an electromagnet push rod mounting base 41. The electromagnet push rod 42 is fixedly mounted on the protective cover 23 via the electromagnet push rod mounting base 41. Both the counter and the electromagnet push rod 42 are electrically connected to the controller. Figure 10As shown, the push rod of the electromagnet push rod 42 is directly opposite the radioactive seed feed channel 221. The distance between the push rod of the electromagnet push rod 42 and the center position of the fiber optic sensor 32 is 1.3 to 1.7 times the length of the radioactive seed 70. When the number of signals sensed by the fiber optic sensor 32 reaches its set value, the counter sends a signal. After receiving the signal, the controller drives the push rod of the electromagnet push rod 42 to move down quickly to close the radioactive seed feed channel 221. This stops the radioactive seeds 70 located directly below the push rod of the electromagnet push rod 42 and those following it from continuing to move towards the feed port 601 of the magazine 60 due to inertia, thus ensuring that the count value of the counting module 30 is consistent with the actual number of radioactive seeds 70 entering the magazine 60.

[0067] like Figure 1 As shown, the control module also includes a touch screen 51, which is located on the top area of ​​the housing body 101 next to the lead glass cover 13. The touch screen 51 is electrically connected to the controller. The touch screen 51 is used for display, parameter setting, and issuing commands.

[0068] Figure 18 This is the first settings interface on the touchscreen 51, where you need to set the total number of radioactive particles and the maximum magazine capacity. The system can automatically calculate the required number of magazines. Clicking the "Start Loading" button will take you to... Figure 19 The second interface shown displays the following three parameters in real time: the magazine number being loaded, the number of radioactive seeds in the magazine, and the number of remaining radioactive seeds. Simultaneously, the system begins sorting the radioactive seeds and loading the magazine. When the magazine is fully loaded, the touchscreen 51 will display the following... Figure 20 The interface shown indicates which magazine has finished loading and prompts the operator to replace it with a new magazine. Once the magazine has been replaced, clicking the "Continue Loading" button will cause the touchscreen 51 to re-display the following... Figure 19 The page shown. When the last magazine is loaded, touchscreen 51 displays as shown. Figure 21 The interface shown.

[0069] like Figure 2 As shown, the end of the radioactive grain feed channel 221 near the vibrating hopper 21 is higher than the end of the radioactive grain feed channel 221 near the magazine 60.

[0070] By setting the end of the radioactive grain feed channel 221 near the vibrating hopper 21 to be higher than the end of the radioactive grain feed channel 221 near the magazine 60, the problem in the prior art that the last few radioactive grains would vibrate in place on the radioactive grain feed channel and not all enter the magazine when the vibrating hopper is loaded can be solved.

[0071] Example 1

[0072] In this embodiment, each magazine 60 can hold a maximum of 25 radioactive pellets 70. This example requires loading 73 radioactive pellets into the magazine. The operator first opens the lead glass cover 13, pours the 73 radioactive pellets into the vibrating hopper 21, and closes the lead glass cover 13. Then, the protective strip 61 is inserted into the magazine 60, the lead glass door 12 is opened, the magazine 60 is installed into the magazine holder 22, and the lead glass door 12 is closed. The power is then turned on. Figure 18 The interface shows a total of 73 radioactive seeds and a maximum load of 25 per magazine. The system automatically calculates the required number of magazines to be 3. Clicking the "Start Loading" button on touchscreen 51 will then display the following... Figure 19 The interface shown displays the magazine number as 1, and the number of radioactive seeds in the magazine and the remaining number of radioactive seeds are displayed in real time on the touchscreen 51. The automatic radioactive seed loading system begins loading radioactive seeds. When the magazine is loaded with 25 radioactive seeds, the control module controls the vibrating hopper 21 to stop working, and simultaneously controls the push rod of the drive electromagnet push rod 42 to move down quickly to close the radioactive seed feed channel 221, thereby stopping the radioactive seeds 70 located directly below the push rod of the electromagnet push rod 42 and those following it from continuing to move towards the magazine's feed port 601 due to inertia. At the same time, the touchscreen 51 displays as follows: Figure 20 The interface shown prompts the operator that the first magazine has finished loading and a new magazine should be replaced. The operator opens the lead glass door 12, takes out the first magazine, pulls out the protective strip 61, and places the first magazine in a suitable position.

[0073] Insert the protective strip 61 into the second magazine, and place the second magazine into the magazine holder 22. Close the lead glass door 12 and click as indicated. Figure 20 The "Continue Loading" button on the interface shown will continue loading the magazine. At this time, touchscreen 51 displays... Figure 19 The interface displays the loading magazine number as 2, and the number of radioactive seeds in the magazine and the remaining number of radioactive seeds are displayed in real time. The automatic radioactive seed loading system begins loading radioactive seeds. When the second magazine is loaded with 25 radioactive seeds, the control module controls the vibrating hopper 21 to stop working, and simultaneously controls the push rod of the driving electromagnet push rod 42 to move down quickly to close the radioactive seed feed channel 221, thereby stopping the radioactive seeds 70 located directly below the push rod of the electromagnet push rod 42 and the subsequent ones from continuing to move towards the magazine 60's feed port 601 due to inertia. At this time, the touch screen 51 displays as shown in the figure. Figure 20 The interface shown prompts the operator that the second magazine has finished loading and a new magazine should be replaced. The operator opens the lead glass door 12, takes out the second magazine, pulls out the protective strip 61, and places the second magazine in a suitable position.

[0074] Insert the protective strip 61 into the third magazine, and place the third magazine into the magazine holder 22. Close the lead glass door 12 and click. Figure 20 The "Continue Loading" button on the interface continues loading the magazine. At this time, touchscreen 51 displays... Figure 19 The interface displays the magazine number as 3, the number of radioactive grains in the magazine, and the remaining number of radioactive grains in real time. The automatic radioactive grain loading system begins loading radioactive grains. When the magazine has loaded 23 radioactive grains, the control module stops the vibrating hopper 21. Simultaneously, the touchscreen 51 displays... Figure 21 The interface shows that all 73 radioactive pods have been loaded. Therefore, this embodiment can achieve continuous loading of multiple magazines.

[0075] This invention provides a concept and method for an automatic loading system for radioactive grains. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A radioactive seed automatic loading system, characterized by, The sorting module (20) and the clip feeding assembly are included. The sorting module (20) includes a vibrating hopper (21) including a discharge port, and is used for sorting radioactive seeds (70) poured into the vibrating hopper (21) and sending the radioactive seeds (70) to the discharge port. The clip feeding assembly includes a clip holder (22) fixedly installed at the discharge port of the vibrating hopper (21), a clip (60) clamped on a side wall of the clip holder (22) away from the vibrating hopper (21), and a radioactive seed feeding channel (221) of the clip holder (22) through which only one radioactive seed (70) passes, one end of the radioactive seed feeding channel (221) being open and connected to the discharge port of the vibrating hopper (21), and the other end of the radioactive seed feeding channel (221) being provided with an entering channel (222) at the bottom, the entering channel (222) being connected to an entering port (601) of the clip (60). The clip holder (22) further includes a slope (225) provided at one end of the radioactive seed feeding channel (221) close to the discharge port of the vibrating hopper (21), the slope (225) extending downward from the radioactive seed feeding channel (221) to the inside of the vibrating hopper (21), the length d of the top edge of the slope (225) being greater than twice the length of the radioactive seed (70), and the distance L1 between the top edge of the slope (225) and the bottom of the radioactive seed feeding channel (221) being greater than the radius of the radioactive seed (70) by 0-0.2 mm.

2. The automatic radioactive seed loading system of claim 1, wherein, The radioactive seed feeding channel (221) is a groove provided on the top surface of the clip holder (22), the clip feeding assembly further includes a protective cover (23) including a covering part (231) and a stop part (232) connected to one end of the covering part (231) close to the discharge port, the bottom surface of the covering part (231) covering the radioactive seed feeding channel (221) above, the stop part (232) being located above the radioactive seed feeding channel (221) away from the vibrating hopper (21), the stop part (232) including a first side vertical surface (233) extending upward from the edge of the radioactive seed feeding channel (221) away from the vibrating hopper (21), and the distance between the end surface of the covering part (231) close to the discharge port and the discharge port being less than or equal to the length d of the top edge of the slope (225) and greater than twice the length of the radioactive seed (70).

3. The radioactive seed automatic loading system of claim 1, wherein, The width b of the radioactive seed feeding channel (221) is greater than the diameter of the radioactive seed (70) by 0.1-0.2 mm.

4. The radioactive seed automatic loading system of claim 1, wherein, The depth h of the radioactive seed feeding channel (221) is greater than the diameter of the radioactive seed (70) and less than twice the diameter of the radioactive seed (70).

5. The automatic radioactive seed loading system of any one of claims 1 to 4, wherein, Further comprising a counting module (30), the counting module (30) comprising a fiber sensor (32) and a counter electrically connected with the fiber sensor (32); the fiber sensor (32) is installed on the side of the magazine seat (22); the fiber sensor (32) is located above the bullet inlet (601) of the magazine (60), the vertical distance e from the center position of the fiber sensor (32) to the bottom of the radioactive seed feeding channel (221) is 0.9-1.1 times the radius of the radioactive seed (70), and the vertical distance f from the center of the fiber sensor (32) to the inner side wall of the bullet feeding channel (222) close to the vibrating hopper (21) is 0.3-0.5 times the length of the radioactive seed (70); the fiber sensor (32) generates an induction signal to the counter for each radioactive seed (70) sensed, and the counter counts the number of received induction signals in real time.

6. The automatic radioactive seed loading system of claim 5, wherein, Further comprising a controller and an electromagnet push rod (42), the counter and the electromagnet push rod (42) are electrically connected with the controller respectively; the push rod of the electromagnet push rod (42) is opposite to the radioactive seed feeding channel (221); the distance between the push rod of the electromagnet push rod (42) and the center position of the fiber sensor (32) is 1.3-1.7 times the length of the radioactive seed (70); when the number of induction signals of the fiber sensor (32) reaches the set value, the counter sends a signal, and the controller drives the push rod of the electromagnet push rod (42) to move downward after receiving the signal, so as to stop the radioactive seed (70) from moving towards the bullet inlet (601) of the magazine (60).

7. A radioactive seed automatic loading system according to claim 6, wherein, Further comprising a shell assembly (10); the shell assembly (10) comprises a shell body (101) and a touch screen (51); the sorting module (20) and the magazine feeding assembly are both installed in the shell body (101); one side of the shell body (101) is provided with a lead glass door (12) for opening or closing the shell body (101), and the lead glass door (12) is used for placing or taking out the magazine (60); the top of the shell body (101) is provided with a lead glass cover plate (13) for opening or closing the shell body (101), and the lead glass cover plate (13) is used for pouring the radioactive seed (70) into the sorting module (20); the touch screen (51) is located in the top area of the shell body (101) beside the lead glass cover plate (13), and the touch screen (51) is electrically connected with the controller.

8. The radioactive seed automatic loading system of claim 1, wherein, The end of the radioactive seed feeding channel (221) close to the vibrating hopper (21) is higher than the end of the radioactive seed feeding channel (221) close to the magazine (60).

9. The radioactive seed automatic loading system of claim 1, wherein, The clip holder (22) comprises a clip mounting groove (223) which is formed on the side wall of the clip holder (22) away from the vibrating hopper (21); the clip (60) is embedded in the clip mounting groove (223); the oppositely arranged two side walls of the clip mounting groove (223) are in interference fit with the upper part of the clip (60).

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