Automatic radioactive particle filling device

Abstract

The invention discloses an automatic radioactive particle filling device which mainly comprises a magazine movement module, a particle tray module, a tray movement module and a platform, particles fall into notches of a particle tray through vibration of a vibration motor, and when the particles fall into each notch, the particle tray is adjusted to a specified posture through a second lead screw; the magazine placing frame moves to a designated position through a first lead screw and pushes a particle leaking plate of a particle tray, and particles fall into a magazine; and the magazine placing frame returns to the original position through the first lead screw, the particle tray returns to the horizontal position through the second lead screw, and the process is repeated, so that the particle filling work is completed. Through cooperation of the magazine movement module, the particle tray module, the tray movement module and the platform control module, particle filling is completed, the particle filling workload of personnel is relieved, the working efficiency is improved, and meanwhile the device is simple in structure, convenient to operate and low in maintenance cost.

Description

Technical Field

[0001] This patent design is in the medical field, specifically a radioactive seed automatic loading device. Background Art

[0002] At present, malignant tumors have become one of the biggest killers of human health. Using radioactive seeds for brachytherapy to treat diseases is a technology developed in recent decades. When the radionuclide in the radioactive seeds decays, it emits radiation, continuously irradiating the diseased cells at a short distance, killing the diseased cells and making them lose their reproductive ability, so as to achieve the purpose of alleviating and treating diseases. This technology has been widely used in the treatment of various tumors, such as breast cancer, prostate cancer, liver cancer and brain tumors, etc., and has achieved good treatment effects. Clinical practice has proved that this technology is safe and reliable, has good curative effects, and causes little damage to normal tissues, and has broad application prospects.

[0003] The radioactive seeds clinically used are mainly 125 I and 103 Pd, which represent low-dose rate and medium-dose rate radiation respectively, and have their own characteristics in radiation physics and radiobiology. The radioactive seeds are very small, generally with a titanium metal shell, sealed by spot welding at both ends. Most of the seed sizes are 0.8 mm in diameter and 4.5 mm in length, and there are also other sizes.

[0004] The main method of using radioactive seeds is minimally invasive percutaneous implantation. First, use a medical planning system and means such as CT, MRI or ultrasound to determine the number and location of radioactive seed implantation, then insert the puncture needle into the predetermined position, and cooperate with a seed implantation gun and a magazine to implant the seeds into the body one by one. The seed magazine mainly consists of a seed bin assembly, a push rod assembly, and a shielding shell assembly. The seeds are arranged in the seed bin assembly. The push rod assembly is inserted into the seed bin assembly, compresses the seeds and is fixed to it by threads. The shielding shell assembly is sleeved outside the seed bin assembly and fixed to the push rod assembly by threads. When in use, the shielding shell assembly needs to be removed and the magazine is inserted into the implantation gun.

[0005] At present, loading the seed magazine mainly adopts the manual method, and the accuracy is controlled by the naked eye. There are the following problems: 1. Radioactive seeds are radioactive and have an impact on the health of operators; 2. Operators need to wear protective clothing, which will affect the operation accuracy; 3. Radioactive seeds are small in size and require delicate operation. Manual operation requires continuous concentration, which is easy to fatigue and has a high failure rate.

[0006] Therefore, it is necessary to design a radioactive seed automatic loading device to solve the above problems.

[0007] Patent Content

[0008] The purpose of this patent is to provide a radioactive particle automatic loading device to solve the problems of inconvenient manual operation and low precision in the current clinical practice proposed in the above background technology.

[0009] To achieve the above object, this patent provides the following technical solution: a radioactive particle automatic loading device, including: a magazine movement module, a particle tray module, a tray movement module and a platform. The magazine movement module is installed on the guide rod seat integrated with the cushion block on the left side of the platform, and the movement of the magazine placement rack is completed by the first lead screw. The tray movement module is installed on the shock transmission block, and the shock transmission block is placed on the platform by four rubber cylinders. The particle tray module is connected to the tray movement module through rotating pins A and B to form a connecting rod slider mechanism.

[0010] Preferably, the magazine movement module includes a magazine placement rack, a first lead screw, guide rods, coupling A, motor A and angle brackets, and is axially symmetric with respect to the first lead screw as a whole. The magazine placement rack is angular, with three circular through holes at the lower end, and the middle hole is threaded. The holes on both sides are on the same horizontal inclined plane as the middle threaded hole, and there are extension brackets at the two holes. The inclined plane of the magazine placement rack has square through holes that are symmetric left and right, and each through hole is fixed with a magazine fixing bracket. The two first lead screws and the guide rods are connected to the guide rod seat of the platform, and the two guide rods are symmetrically horizontally placed relative to the first lead screw. The left side of the first lead screw is connected to the first motor A by a coupling and is installed on the guide rod frame on the platform by bearings. The first motor A is fixed to the angle bracket with bolts, and the angle bracket is fixed to the cushion block on the left side of the platform.

[0011] Preferably, the particle tray module includes an upper leakage plate, a long side of the tray, a short side of the tray, a lower leakage plate and elastic rubber blocks. The particle tray module is framed by the long side and the short side of the tray. The upper leakage plate is composed of six particle leakage bricks and a flat plate. The center of the particle leakage brick has a rectangular through hole and presents a basin structure with high surrounding and low middle. The lower leakage plate has six through holes distributed in the same way as the upper leakage plate, and there is a leakage plate cross beam on one side of each through hole, and the cross section of the cross beam is triangular.

[0012] Preferably, guide rail grooves are provided on both sides of the bottom end of the upper leakage plate. The long side of the tray is provided with a guide rail for the slider and a guide rail groove for the lower leakage plate. The upper and lower sides of the lower leakage plate are provided with guide rails. The elastic rubber block is placed in the track groove formed between the upper leakage plate and the long side of the tray and is in the same plane as the guide rail of the lower leakage plate.

[0013] Preferably, the tray movement module includes a second lead screw, a long slider, a second motor, a coupling B, bearings, a vibration motor, a shock transmission block, a rubber cylinder, and a linkage mechanism. The whole is axisymmetric about the second lead screw. The shock transmission block is placed by the rubber cylinder above the cylindrical groove of the platform, and there is a circular blind hole at the bottom. The vibration motor is placed in the cylindrical groove of the platform, and the cam at the top cooperates with the blind hole of the shock transmission block. The motor mount is fixed on one side of the shock transmission block, and the second motor is fixed on it by bolts. The second motor and the second lead screw are connected by a coupling B. The second lead screw is installed in cooperation with the lead screw seats on both sides of the shock transmission block through bearings. There is a threaded through hole in the middle of the long slider, and there is a guide rail groove at the bottom that cooperates with the guide rail of the shock transmission block. The lower end of the linkage mechanism is installed on the long slider and a lead screw seat, and the upper end is connected to the slider and the short side of the tray.

[0014] Preferably, there are through holes in the vertical plate of the motor fixing frame of the shock transmission block, through holes in the center of the thin lead screw seat, and blind holes in the center of the thick lead screw seat. The outermost side of the convex guide rail is tangent to the lead screw seat. The linkage mechanism includes a link A, a link B, a rotating pin A, a rotating pin B, a slider, and a long slider. The link A is connected to the long slider and the short side of the tray through the rotating pin A. The link B is connected to the thick lead screw seat of the shock transmission block and the slider through the rotating pin A. The link A and the link B are connected through the rotating pin B.

[0015] Preferably, one of the guide rod seats on the platform has three through holes, and the other guide rod seat has three blind holes. There is a threaded hole drilled in the center of the upper side of the spacer block. The first lead screw switch and the second lead screw switch are three-position switches, and the vibration motor switch is a two-position switch.

[0016] Preferably, the magazine is fixed on the magazine fixing support on the magazine placement rack.

[0017] The beneficial effects of this patent are as follows: 1. The device has a simple structure and is convenient to operate. It can automatically complete the loading of the radioactive particle magazine with high efficiency. 2. The radioactive particles do not need to be picked up with tweezers, but are evenly pushed into the magazine by the push rod in contact with the particle surface, greatly reducing the particle damage rate. 3. Compared with manual operation, the workload of the operator is greatly reduced, and the error rate of the staff is reduced. In summary, when using this device, the overall production efficiency is improved, and the labor intensity and error rate are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of this patent

[0019] Figure 2 It is a working schematic diagram of this patent

[0020] Figure 3 It is a schematic diagram of the working details of this patent

[0021] Figure 4 Exploded view of the particle tray of this patent

[0022] Figure 5 Cross-sectional view of the particle tray of this patent

[0023] Figure 6 Schematic diagram of the details of the vibration motor of this patent

[0024] In the figure, the details of the component markings are as follows: 1. Platform, 2. Vibration transfer block, 3. Tray movement module, 4. Bearing, 5. Particle tray module, 6. Magazine movement module, 7. Magazine, 8. Magazine placement rack, 9. Angle code, 10. First motor switch, 11. Second motor switch, 12. Rubber cylinder, 13. Vibration motor switch, 14. Vibration motor, 301. Second lead screw, 302. Link A, 3031. Rotation pin A, 3032. Rotation pin B, 304. Link B, 305. Long slider, 306. Second motor, 307. Coupling B, 308. Slider, 501. Upper leakage tray, 502. Long side of the tray, 503. Short side of the tray, 504. Lower leakage tray, 505. Elastic rubber block, 601. First lead screw, 602. Guide rod, 603. Coupling A, 604. First motor.

[0025] Specific implementation scheme (function)

[0026] The following will combine the attachments in this patent Figure 1-6 , and clearly and completely describe the technical solutions in the patent. Obviously, the described embodiments are only a part of the embodiments of this patent, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of this patent.

[0027] Please refer to Figure 1-6 , this patent provides a technical solution: a radioactive particle automatic loading device, such as Figure 1 including: platform 1, tray movement module 3, particle tray module 5 and magazine movement module 6. The magazine movement module 6 is installed on the cushion block on the left side of the platform 1 and the guide rod 602 seat integrated with the platform 1, and the feeding movement of the magazine placement rack 8 is realized by the first lead screw 601. The tray movement module 3 is installed on the vibration transfer block 2, and the attitude change of the particle tray module 5 is realized by the second lead screw 301. The vibration transfer block 2 is placed on the platform 1 by four rubber cylinders 12. The particle tray module 5 is connected to the tray movement module 3 through the rotation pin A 3031 to form a link-slider mechanism to realize a small-amplitude vibration in the horizontal direction of the vibration transfer block 2.

[0028] The magazine movement module 6 includes (such as Figure 1 , Figure 2):Magazine placement rack 8, first lead screw 601, guide rod 602, coupling A 603, motor A 604 and angle code 9, and the whole is axisymmetric with respect to the first lead screw 601. The magazine placement rack 8 is angular, with three circular through holes at the lower end, and the middle hole is provided with a thread. It is driven by a lead screw. The holes on both sides and the middle threaded hole are on the same horizontal plane, and there are extension brackets at the two holes to keep the movement of the magazine placement rack 8 stable. The inclined surface of the magazine placement rack 8 has square through holes that are symmetric left and right, and each through hole is fixed with a magazine fixing bracket 605 for placing the magazine 7. The two first lead screws 601 and the guide rod 602 are connected to the guide rod seat of the platform 1. The two guide rods 602 are symmetrically horizontally placed relative to the first lead screw 601. The left side of the first lead screw 601 is connected to the first motor A 604 by a coupling and is installed on the guide rod frame of the platform 1 by a bearing 4. The first motor A 604 is fixed to the angle code 9 with bolts and gaskets. The angle code 9 is fixed to the cushion block on the left side of the platform 1.

[0029] The particle tray module 5 includes (such as Figure 4 , Figure 5 ):Upper layer leak plate 501, long side of the tray 502, short side of the tray 503, lower layer leak plate 504 and elastic rubber block 505. The particle tray module 5 is framed by the long side of the tray 502 and the short side of the tray 503. The upper layer leak plate 501 is composed of six particle leak bricks and a flat plate. The center of the particle leak brick has a rectangular through hole and presents a basin structure with high surrounding and low middle, which can guide the particles to fall into the groove. The lower layer leak plate 504 has six through holes with the same distribution as the upper layer leak plate 501, and there is a leak plate cross beam on one side of each through hole. The cross section of the cross beam is triangular. The through holes of the upper floor slab and the lower layer leak plate are not connected in the initial state.

[0030] Guide rail grooves are provided on both sides of the bottom end of the upper layer leak plate 501. The long side of the tray 502 is provided with a guide rail for the slider 308 and a guide rail groove for the lower layer leak plate 504. Guide rails are provided on both sides of the upper and lower surfaces of the lower layer leak plate 504. The lower layer leak plate 504 can be slid to align the through holes of the upper layer leak plate 501 and the lower layer leak plate 504, so that the particles fall. The elastic rubber block 505 is placed in the track groove formed between the upper layer leak plate 501 and the long side of the tray 502 and is on the same plane as the guide rail of the lower layer leak plate 504, which can make the lower layer leak plate 504 return to the starting position.

[0031] The tray movement module 3 includes a second lead screw 301, a long slider 305, a second motor 306, a coupling B 307, a bearing 4, a vibration motor 14, a shock transmission block 2, a rubber cylinder 12, and a linkage mechanism. The whole is axisymmetric about the second lead screw 301. The shock transmission block 2 is placed above the cylindrical groove of the platform 1 by the rubber cylinder 12, and has a circular blind hole at the bottom. The vibration motor 14 is placed in the cylindrical groove of the platform 1, and the cam at the top cooperates with the blind hole of the shock transmission block 2 (as Figure 6 ), through the rotation of the cam of the vibration motor 14, the vibration of the shock transmission block 2 is realized, driving the particle tray module 5 to vibrate. The motor mount is fixed on one side of the shock transmission block 2, and the second motor 306 is fixed on it by bolts. The second motor 306 is connected to the second lead screw through the coupling B. The second lead screw 301 is installed in cooperation with the lead screw seats on both sides of the shock transmission block 2 through the bearing 4 and cooperates with the long slider 305. The long slider 305 has a threaded through hole in the middle, and a guide rail groove at the bottom cooperates with the guide rail of the shock transmission block 2 to realize sliding. The lower end of the linkage mechanism is installed on the long slider 305 and a lead screw seat, and the upper end is connected to the slider 308 and the short side 503 of the tray.

[0032] The vertical plate of the motor fixing frame of the shock transmission block 2 has a through hole, the center of the thin lead screw seat has a through hole, and the center of the thick lead screw seat has a blind hole. The outermost side of the convex guide rail is tangent to the lead screw seat. The linkage mechanism includes a link A 302, a link B 304, a rotating pin A 3031, a rotating pin B 3032, a slider 308, and a long slider 305. The link A 302 is connected to the long slider 305 and the short side 503 of the tray through the rotating pin A 3031. The link B 304 is connected to the thick lead screw seat of the shock transmission block 2 and the slider 308 through the rotating pin A 3031. The link A 302 and the link B 304 are connected through the rotating pin B 3032 to realize the movement of the particle tray module.

[0033] One of the guide rod seats on the platform 1 has three through holes, and the other guide rod seat has three blind holes. The center of the cushion block is drilled with a threaded hole on the upper side. The first lead screw switch 10 and the second lead screw switch 11 are three - position switches, which can realize forward movement, backward movement, and pause movement. The vibration motor switch 13 is a two - position switch, controlling the start and stop of the vibration motor 14.

[0034] The magazine 7 is fixed on the magazine fixing bracket 605 on the magazine placement rack 8. The upper half of the magazine fixing bracket 605 is made of flexible material, which is convenient for the disassembly of the magazine. The front face of the magazine fixing bracket 605 is perpendicular to the horizontal, and can push the cross beam of the lower leakage plate 504 (as Figure 3 )

Claims

1. An automatic radioactive particle loading device, characterized in that: It includes: a magazine movement module 6, a particle tray module 5, a tray movement module 3 and a platform 1, wherein the magazine movement module 6 is installed on a pad on the left side of the platform 1 and a guide rod 602 seat which is integrated with the platform 1, and the movement of the magazine placement rack 8 is completed by a first screw 601, and the tray movement module 3 is installed on a shock-transmitting block 2, and the shock-transmitting block 2 is placed on the platform 1 by four rubber cylinders 12, and the particle tray module 5 is connected to the tray movement module 3 by a rotating pin A3031 to form a connecting rod slider mechanism.

2. The automatic radioactive particle loading device according to claim 1, characterized in that: The magazine movement module 6 includes a magazine placement rack 8, a first lead screw 601, a guide rod 602, a coupling A 603, a motor A 604 and an angle code 9, and is symmetrical as a whole relative to the axis of the first lead screw 601. The magazine placement rack 8 is angular, and has three circular through holes at the lower end, and the middle hole is provided with a thread, and the holes on both sides are in the same horizontal plane as the middle threaded hole, and there are extension racks at the two holes. The inclined surface of the magazine placement rack 8 has left-right symmetrical square through holes, and each through hole is fixed with a magazine fixing bracket 605. The two first lead screws 601 and the guide rods 602 are connected to the guide rod seat of the platform 1, and the two guide rods 602 are symmetrically placed horizontally relative to the first lead screw 601. The left side of the first lead screw 601 is connected to the first motor A 604 by a coupling, and is installed on the guide rod rack on the platform 1 by a bearing 4. The first motor A 604 is fixed to the angle code 9 with bolts, and the angle code 9 is fixed to the pad on the left side of the platform 1.

3. The automatic radioactive particle loading device according to claim 1, characterized in that: The particle tray module 5 includes an upper leakage plate 501, a long side 502 of the tray, a short side 503 of the tray, a lower leakage plate 504 and an elastic rubber block 505. The particle tray module 5 uses the long side 502 and the short side 503 of the tray as a frame. The upper leakage plate 501 is composed of six particle leakage bricks and a flat plate. The particle leakage brick has a rectangular through hole in the center and presents a basin structure with high sides and a low middle. The lower leakage plate 504 has six through holes distributed in the same manner as the upper leakage plate 501, and there is a leakage plate beam on one side of each through hole, and the cross section of the beam is triangular.

4. The automatic radioactive particle loading device according to claim 3, characterized in that: Guide rail grooves are arranged on both sides of the bottom end of the upper leakage plate 501, the guide rails of the slider 308 and the guide rail groove of the lower leakage plate 504 are arranged in the long side 502 of the tray, and guide rails are arranged on both sides of the upper and lower sides of the particle leakage plate. The elastic rubber block 505 is placed in the track groove formed between the upper leakage plate 501 and the long side 502 of the tray, and is in the same plane as the guide rail of the lower leakage plate 504.

5. The automatic radioactive particle loading device according to claim 1, characterized in that: The tray motion module 3 includes a second lead screw 301, a long slider 305, a second motor 306, a coupling B307, a bearing 4, a vibration motor 14, a vibration transmission block 2, a rubber cylinder 12 and a connecting rod mechanism, and the whole is symmetrical about the second lead screw 301 axis. The vibration transmission block 2 is placed above the cylindrical groove of the platform 1 by the rubber cylinder 12, and a circular blind hole is provided at the bottom. The vibration motor 14 is placed in the cylindrical groove of the platform 1, and the cam at the top cooperates with the blind hole of the vibration transmission block 2. The motor frame is fixed on On one side of the vibration transmission block 2, a second motor 306 is fixed on it by bolts, the second motor 306 and the second lead screw are connected through a coupling B, the second lead screw 301 is installed with the lead screw seats on both sides of the vibration transmission block 2 through bearings 4, and cooperates with the long slider 305, the long slider 305 has a threaded through hole in the middle, and a guide groove at the bottom end cooperates with the guide rail of the vibration transmission block 2, the lower end of the connecting rod mechanism is installed on the long slider 305 and a lead screw seat, and the upper end is connected to the slider 308 and the short side 503 of the tray.

6. The automatic radioactive particle loading device according to claim 5, characterized in that: The vertical plate of the motor fixing frame of the vibration transmission block 2 has a through hole, the center of the thin screw seat has a through hole, the center of the thick screw seat has a blind hole, the outermost side of the convex guide rail is tangent to the screw seat, and the connecting rod mechanism includes a connecting rod A302, a connecting rod B304, a rotating pin A3031, a rotating pin B3032, a slider 308 and a long slider 305. The connecting rod A302 is connected to the long slider 305 and the short side 503 of the tray through the rotating pin A3031, the connecting rod B304 is connected to the thick screw seat and the slider 308 of the vibration transmission block 2 through the rotating pin A3031, and the connecting rod A302 and the connecting rod B304 are connected through the rotating pin B3032.

7. The automatic radioactive particle loading device according to claim 1, characterized in that: One of the guide rod seats on the platform 1 is provided with three through holes, and the other guide rod seat is provided with three blind holes. A threaded hole is drilled at the center of the upper side of the center of the cushion block. The first lead screw switch 10 and the second lead screw switch 11 are three-speed switches, and the vibration motor switch 13 is a two-speed switch.

8. The automatic radioactive particle loading device according to claim 2, characterized in that: The magazine 7 is fixed on a magazine fixing support 605 on the magazine placement rack 8 .

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