Weight detection device applied to pharmaceutical production

Abstract

A weight detection device applied to medicine production comprises a conveying belt, a first support is fixedly arranged at the top of the conveying belt, a weight sensor is fixedly arranged at the top of the first support, a weighing disc is fixedly arranged at the top of the weight sensor, a conical groove is formed in the top of the weighing disc, and a through hole is formed in the center of the conical groove; a second support moving along with the conveying belt is arranged at the top of the conveying belt, and a containing bag is detachably arranged at the top of the second support. A motor is fixedly arranged on the conveying belt, a telescopic piece is fixedly arranged at the output end of the motor, and the telescopic end of the telescopic piece is detachably connected with the bottom of the containing bag. The second support is further provided with a limiting assembly used for preventing the containing bag from being loosened and opened after being twisted. Tightening packaging of the bag opening of the containing bag is achieved, then package sealing is formed on the weighed medicine, and isolation between the medicine and the external environment is achieved.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical manufacturing technology, and more specifically to a weight detection device used in pharmaceutical manufacturing. Background Technology

[0002] Pharmaceuticals are substances used to prevent, treat, or diagnose human diseases, purposefully regulate human physiological functions, and have specified indications or therapeutic functions, usage, and dosage. They include traditional Chinese medicine, chemical drugs, and biological products. In the pharmaceutical manufacturing process, the accuracy of drug dosage and the uniformity of packaging specifications directly affect medication safety and therapeutic efficacy; therefore, weight verification is a crucial quality control measure in pharmaceutical production. Whether it's solid dosage forms such as tablets, capsules, and granules, or liquid dosage forms such as injections and oral liquids, the production process requires weight verification of individual drugs or packaging units.

[0003] For example, the patent document with publication number "CN119573848B" and title "A drug weighing device for treating nervous system diseases with traditional Chinese medicine" includes a support base. The upper end of the support base is provided with a weighing component, and the lower end of the support base is provided with a drug receiving component. The drug receiving component includes a fixing strip, which is fixedly connected to the lower end of a shielding column. Cylinders are fixedly connected to the upper surfaces of both ends of the fixing strip. The two cylinders are embedded in two recessed holes, which are opened on the upper surface of the support base. A cylinder is fixedly connected to the lower surface of the support base. Two clamping grooves are symmetrically opened on the outer wall of the cylinder. A U-shaped base is fixedly connected to the lower surface of the support base, and a medicine tray is placed on the inner wall of the U-shaped base. Two cylinders drive the fixing bar to move down, which in turn drives the shielding column to move down. As the shielding column moves down, the upper cone block is pulled out from the lower end of the snap-fit ​​hole, through hole, and round hole in sequence. At this time, the medicinal materials in the cone plate fall down with the snap-fit ​​hole and through hole, causing the medicinal materials to fall into the inside of the medicine plate along the cone block. The medicine plate is moved and packaged by moving the medicine plate.

[0004] However, in practical applications, although the cylinder can shield and protect the falling medicinal materials to prevent contamination, some medicines that are easily hygroscopic, easily oxidized, or highly sensitive to light will be directly exposed to the outside air environment during the process of moving and packaging the medicines in the medicine tray. They are very likely to deteriorate in quality due to moisture absorption, oxidation, or light exposure, which will have an adverse effect on the overall quality of the medicines. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a weight detection device for pharmaceutical production. This device solves the technical problem mentioned in the background art, where medicinal materials are directly exposed to the external air environment during the process of moving and packaging medicinal materials in a medicine tray, making them highly susceptible to quality deterioration due to moisture absorption, oxidation, or light exposure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A weight detection device for pharmaceutical production includes a conveyor belt, a first support fixedly mounted on the top of the conveyor belt, a weight sensor fixedly mounted on the top of the first support, a weighing pan fixedly mounted on the top of the weight sensor, a conical groove on the top of the weighing pan, and a through hole at the center of the conical groove. The top of the conveyor belt is equipped with a second support that moves with it, and the top of the second support is detachably equipped with a container bag. A motor is fixedly installed on the conveyor belt, and a telescopic component is fixedly installed at the output end of the motor. The telescopic end of the telescopic component is detachably connected to the bottom of the bag. The telescopic component can drive the container bag to move upward, so that the container bag is inserted into the through hole of the weighing pan and the through hole is blocked; and the telescopic component can drive the container bag to move downward, so that the medicine falls into the container bag through the through hole for collection. The motor can drive the bag to rotate via a telescopic component to achieve a tight seal at the bag opening; The second support is also equipped with a limiting component to prevent the packaging bag from loosening and opening after twisting.

[0007] Furthermore, a connecting block is fixedly provided at the telescopic end of the telescopic component, a magnet is fixedly provided at the top of the connecting block, and a fixing block is fixedly provided at the bottom of the packaging bag. The fixing block is made of magnetic material and can form a magnetic adsorption fit with the magnet.

[0008] Furthermore, the bottom surface of the fixing block is arrayed with multiple docking slots, and multiple magnets are arrayed on the top surface of the connecting block. Each magnet corresponds to one of the multiple docking slots, and the magnets can be inserted into the corresponding docking slots.

[0009] Furthermore, the limiting component includes two limiting plates that are horizontally slidably disposed on the second bracket and symmetrically arranged. The second bracket is also provided with a transmission component, which is used to drive the two limiting plates to move towards each other to form a clamping and limiting position on the fixed block.

[0010] Furthermore, the transmission assembly includes two sliding rods that are horizontally slidably arranged on the second bracket and are symmetrically arranged. Each of the two sliding rods has a pressing rod fixedly installed at one end opposite to the other. The limiting plate is integrally formed with a movable plate, and the movable plate has an inclined groove that slides with the pressing rod. A driving assembly is provided on the conveyor belt. The driving assembly can drive the pressing rod to move downward in the vertical direction, and then drive the two limiting plates to move towards each other through the sliding engagement of the inclined groove and the pressing rod.

[0011] Furthermore, the drive assembly includes a base fixedly mounted on the conveyor belt and a lead screw fixedly mounted on the top of the base. The lead screw is coaxially rotatably sleeved on the outer periphery of the telescopic end of the telescopic component. A disc is threadedly connected to the outer periphery of the lead screw. The disc abuts against the lower pressure rod. A through hole is provided on the disc. An insert rod is fixedly mounted at the bottom of the connecting block. The insert rod is inserted into the through hole.

[0012] Furthermore, two symmetrically arranged reset rods are slidably arranged on the base, a mounting plate is fixedly installed at the bottom of the reset rod, a reset spring is fixedly installed between the mounting plate and the base, and the top of the reset rod is slidably connected to the disc.

[0013] Furthermore, the inner side of the limiting plate is arc-shaped, and an installation groove is evenly provided along its circumference on the inner side of the limiting plate. A limiting post is slidably provided in the installation groove, and protrusions are evenly distributed on the end face of the limiting post extending out of the installation groove. A push spring is fixedly provided between the limiting post and the installation groove.

[0014] Furthermore, the outer periphery of the fixing block is provided with a limiting groove that is adapted to the limiting post.

[0015] Furthermore, a cover plate is hinged to the top of the first bracket, which can cover the weighing pan inside.

[0016] The beneficial effects of this invention are as follows: A packaging bag is detachably mounted on the top of the second support, a motor is fixedly mounted on the conveyor belt, and a telescopic component is fixedly mounted on the output end of the motor. The telescopic end of the telescopic component is detachably connected to the bottom of the packaging bag. After the medicine is weighed, the telescopic component can drive the packaging bag to move downwards, so that the packaging bag no longer blocks the through hole. At this time, the medicine falls into the packaging bag through the through hole under its own weight. As the telescopic component continues to retract, the packaging bag will be concave downwards, so that the medicine is concentrated in the concave area in the middle of the packaging bag for centralized collection. Then, the motor drives the telescopic component to rotate, and the telescopic component drives the packaging bag to rotate, so as to tighten and seal the opening of the packaging bag, thereby forming a sealed package for the medicine after weighing, achieving isolation between the medicine and the external environment. This provides a temporary protective environment for the medicine, preventing some medicines that are prone to moisture absorption, oxidation, or high light sensitivity from being directly exposed to the outside air environment during the subsequent packaging process, preventing quality deterioration due to moisture absorption, oxidation, or light exposure, thereby ensuring the overall quality stability of the medicine. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A; Figure 4 For the present invention Figure 2 Enlarged view of point B; Figure 5 This is a perspective view of the connecting block of the present invention; Figure 6 This is a perspective view of the first support of the present invention; Figure 7 This is a front view of the limiting component of the present invention; Figure 8 This is a perspective view of the driving component of the present invention; Figure 9 This is a diagram showing the twisted state of the packaging bag of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Conveyor belt; 3. Rotating roller; 4. First support; 5. Weight sensor; 6. Weighing pan; 7. Cover plate; 8. Through hole; 9. Second support; 10. Packing bag; 11. Fixed rod; 12. Motor; 13. Telescopic component; 14. Connecting block; 15. Magnet; 16. Fixed block; 17. Limiting plate; 18. U-shaped rod; 19. Sliding rod; 20. Slide rail; 21. Downward pressure rod; 22. Moving plate; 23. Inclined groove; 24. Base; 25. Lead screw; 26. Disc; 27. Through hole; 28. Insert rod; 29. ​​Mounting groove; 30. Limiting post; 31. Push spring; 32. Limiting groove; 33. Reset rod; 34. Mounting plate; 35. Reset spring; 36. Guide groove; 37. Guide block. Detailed Implementation

[0019] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1-9 As shown, a weight detection device for pharmaceutical production includes a conveyor belt comprising a frame 1 and two conveyor belts 2. The frame 1 is H-shaped, with rotating rollers 3 rotatably mounted at both ends along its length. A servo motor 12 (not shown) is fixedly mounted on the frame 1, and the output end of the servo motor 12 is coaxially and fixedly connected to one of the rotating rollers 3. The two conveyor belts 2 are spaced apart along the width of the frame 1 around the outer periphery of the rotating rollers 3.

[0021] A first bracket 4 is bolted to the top of the frame 1. Four weight sensors 5 are fixedly mounted on the top of the first bracket 4, arranged in a circular array around the center of the first bracket 4. A weighing pan 6 is fixedly mounted between the tops of the four weight sensors 5. A control panel (not shown in the figure) is fixedly mounted on one side of the frame 1, and the control panel is electrically connected to the four weight sensors 5. A cover plate 7 is hinged to the top of the first bracket 4, which covers the weighing pan 6 to prevent contamination of the medicine during the weighing process. The medicine to be weighed is placed in the weighing pan 6, and the cover plate 7 is flipped over to cover the weighing pan 6. The weight of the medicine is then measured by the four weight sensors 5, and the detected weight signal is converted into an electrical signal and transmitted to the control panel. The control panel processes the weight data and displays the reading for the operator to read intuitively.

[0022] The weighing pan 6 has a conical groove at its top. The conical groove is a tapered structure that gradually slopes downwards from the edge of the weighing pan 6 towards its center, and a through hole 8 is formed at the center of the conical groove. Multiple second supports 9 are mounted on the top of the conveyor belt, moving with it. Both the second supports 9 and the first supports 4 are inverted "U"-shaped structures. The bottom sides of the second supports 9 are fixedly connected to the corresponding conveyor belts 2. Vertical through holes 27 are formed at the centers of the second supports 9 and the first supports 4, coaxial with the through hole 8.

[0023] A container bag 10 is detachably mounted on the top of the second support 9. Four fixing rods 11 arranged in a circumferential array are fixedly mounted on the top of the second support 9. The container bag 10 has four mounting holes arranged in a circumferential array along its edge, each corresponding to one of the four fixing rods 11. The container bag 10 passes through these mounting holes onto the fixing rods 11, achieving a detachable connection with the second support 9. The container bag 10 is made of one of the following materials: modified light-shielding medical-grade LDPE film, light-shielding modified medical-grade silicone film, and polyamide, aluminum foil, or polyethylene (PA / AL / PE) composite film. This allows the container bag 10 to easily achieve twisting, sealing, stretching, and other deformations. It also has strong sealing properties and is moisture-proof and oxidation-proof, making it suitable for vitamins, anti-tumor drugs, and other light- and environmentally sensitive medications.

[0024] A motor 12 is fixedly installed inside the frame 1. The output end of the motor 12 faces vertically upward and is coaxially arranged with the through hole 8. A telescopic component 13 is fixedly installed at the output end of the motor 12. The telescopic component 13 is an electric telescopic rod, and its telescopic end is detachably connected to the bottom of the packaging bag 10. A connecting block 14 is fixedly installed at the telescopic end of the telescopic component 13. Four magnets 15 arranged in a circumferential array are fixedly installed on the top surface of the connecting block 14. A fixing block 16 is fixedly installed at the bottom center of the packaging bag 10. The fixing block 16 is made of magnetic material and can form a magnetic attraction with the magnets 15. The bottom surface of the fixing block 16 has multiple docking slots arranged in an array. The multiple magnets 15 correspond one-to-one with the multiple docking slots, and the magnets 15 can be inserted into the corresponding docking slots to ensure that the connecting block 14 can drive the fixing block 16 to move vertically and rotate synchronously.

[0025] The telescopic component 13 can drive the container bag 10 to move upward via the connecting block 14 and the fixing block 16. During this process, the container bag 10 wraps around the outer periphery of the connecting block 14 and the fixing block 16, and inserts the container bag 10 into the through hole 8 of the weighing pan 6, sealing the through hole 8. The fixing block 16 is positioned higher than the lowest point of the weighing pan 6. After weighing the medicine, the telescopic component 13 can drive the container bag 10 downward via the connecting block 14 and the fixing block 16, so that the container bag 10 no longer blocks the through hole 8. At this time, the medicine falls into the container bag 10 through the through hole 8 under its own weight. Because the container bag 10 is in a relaxed state in this state, the falling medicine will cause the container bag 10 to undergo adaptive deformation, thereby preventing the medicine from slipping out of the container bag 10. As the telescopic component 13 continues to retract, the container bag 10 will indent downward, causing the medicine to be concentrated and collected in the concave area in the middle of the container bag 10.

[0026] Subsequently, motor 12 drives telescopic component 13 to rotate. Telescopic component 13, through connecting block 14 and fixing block 16, drives the packaging bag 10 to rotate, thereby tightening and sealing the opening of the packaging bag 10. This forms a sealed package for the weighed medicine, isolating it from the external environment. This provides a temporary protective environment for the medicine, preventing some hygroscopic, easily oxidized, or highly light-sensitive medicines from being directly exposed to the outside air during the subsequent packaging process. This prevents quality deterioration due to moisture absorption, oxidation, or light exposure, thus ensuring the overall quality stability of the medicine.

[0027] Because the elasticity of the bag opening of the packaging bag 10 will generate a reverse torsional force after the bag opening is tightened, which can easily cause the bag opening to loosen and open, a limiting component is also installed on the second bracket 9 to prevent the packaging bag 10 from loosening and opening after twisting. The limiting component includes two limiting plates 17 that are horizontally slidably installed on the second bracket 9 and symmetrically arranged, with the inner sides of the two limiting plates 17 being arc-shaped. Two U-shaped rods 18 are horizontally slidably arranged on the second bracket 9, and the opposite ends of the two U-shaped rods 18 are fixedly connected to the corresponding limiting plates 17. Rubber sleeves are fixedly installed at the points where the second bracket 9 and the U-shaped rods 18 pass through, increasing the friction between the U-shaped rods 18 and the second bracket 9 and preventing the U-shaped rods 18 from moving unexpectedly when no external force is applied. A transmission component is also installed on the second bracket 9. The transmission component is used to drive the two limiting plates 17 to move towards each other to clamp and limit the fixing block 16, thereby preventing the bag opening from loosening and opening due to the reverse rotation of the fixing block 16 after the packaging bag 10 is tightened and sealed.

[0028] The transmission assembly includes two sliding rods 19 horizontally slidably mounted on the inner side of the second bracket 9 and symmetrically arranged. Two slide rails 20 are fixedly mounted symmetrically on the inner side of the second bracket 9, and the slide rails 20 are slidably connected to the corresponding sliding rods 19. A pressing rod 21, which is a right-angle structure, is fixedly mounted on the opposite end of each of the two sliding rods 19. The bottom of the limiting plate 17 has an integrally formed movable plate 22, on which a slanted groove 23 is formed, slidingly engaging with the bottom of the pressing rod 21. A drive assembly is mounted on the frame 1, which can drive the pressing rod 21 to move downwards in the vertical direction, thereby driving the two limiting plates 17 to move towards each other through the sliding engagement of the slanted groove 23 and the pressing rod 21.

[0029] The drive assembly includes a base 24 fixedly mounted on the conveyor belt and a lead screw 25 fixedly mounted on the top of the base 24. The lead screw is coaxially rotatably sleeved on the outer periphery of the telescopic end of the telescopic member 13. A disc 26 is threadedly connected to the outer periphery of the lead screw 25, and the disc 26 abuts against the pressing rod 21. The disc 26 has multiple through holes 27 arranged in a circumferential array. Multiple insert rods 28 are fixedly mounted in a circumferential array on the bottom of the connecting block 14. The multiple insert rods 28 correspond one-to-one with the multiple through holes 27, and the insert rods 28 are inserted into the corresponding through holes 27.

[0030] When the telescopic component 13 moves the connecting block 14 downward, the connecting block 14 simultaneously moves the insertion rod 28 downward, so that the insertion rod 28 is inserted into the through hole 27 of the disc 26. When the fixed block 16 is between the two limiting plates 17, the motor 12 is started, and the motor 12 drives the telescopic component 13 to rotate. The telescopic component 13 drives the connecting block 14 to rotate synchronously, and the connecting block 14 drives the disc 26 to rotate around the lead screw 25 through the insertion rod 28. During the rotation of the disc 26, it descends synchronously along the axial direction of the lead screw 25, thereby driving the pressing rod 21 to move downward in the vertical direction. When the bottom of the pressing rod 21 slides along the inclined groove 23 of the moving plate 22, the two limiting plates 17 are driven to move towards each other in the direction close to the fixed block 16 through the guiding action of the inclined groove 23, so that while the fixed block 16 drives the packaging bag 10 to twist and seal, the two limiting plates 17 just form a clamping and limiting position on the fixed block 16.

[0031] The friction between the two limiting plates 17 and the fixing block 16 prevents the fixing block 16 from rotating in the opposite direction, ensuring a stable and tight seal at the opening of the packaging bag 10. This prevents the bag opening from becoming loose and open after the packaging bag 10 is tightly sealed due to the reverse rotation of the fixing block 16, thus preventing the quality of the medicine from being affected by the external environment. Subsequently, the telescopic component 13 continues to move downward, causing the magnet 15 on the connecting block 14 to disengage from the mating groove of the fixing block 16. After the sealing action is completed, the packaging bag 10 moves synchronously with the conveyor belt and enters the subsequent packaging process.

[0032] The inner side of the limiting plate 17 is provided with a plurality of mounting grooves 29 evenly distributed along its circumference, and the limiting post 30 is slidably mounted in the mounting groove 29. The end face of the limiting post 30 extending out of the mounting groove 29 is provided with protrusions evenly distributed (not shown in the figure), and a push spring 31 is fixedly mounted between the limiting post 30 and the groove wall of the mounting groove 29. When the limiting plate 17 moves the limiting post 30 toward the fixing block 16, the limiting post 30 retracts into the mounting groove 29 after contacting the fixing block 16, thereby compressing the push spring 31. At this time, the restoring force of the push spring 31 can apply a continuous elastic push force toward the fixing block 16 to the limiting post 30. The protrusions on the end face of the limiting post 30 can increase the friction between it and the fixing block 16, thereby further preventing the fixing block 16 from rotating in the opposite direction and ensuring the stability of the twisted sealing of the bag opening of the packaging bag 10.

[0033] The outer periphery of the fixing block 16 is provided with a limiting groove 32 that matches the limiting post 30. When the two limiting plates 17 clamp the fixing block 16, the limiting post 30 on the limiting plate 17 may not be able to be directly and precisely aligned with the limiting groove 32. In this case, if the fixing block 16 has a tendency to rotate in the opposite direction due to insufficient friction and experiences a slight reversal, the fixing block 16 will synchronously drive the limiting groove 32 to rotate. When the limiting groove 32 rotates to a position aligned with the next limiting post 30, the limiting post 30 is quickly inserted into the limiting groove 32 under the elastic force of the push spring 31, thereby limiting the fixing block 16 from continuing to rotate in the opposite direction. This structure, by converting frictional limiting into mechanical insertion limiting, is equivalent to adding a safety mechanism to prevent the fixing block 16 from rotating in the opposite direction, further improving the stability of the packaging bag 10 after the bag opening is tightened and sealed.

[0034] Two symmetrically arranged reset rods 33 are slidably mounted on the base 24, with the reset rods 33 arranged vertically. A mounting plate 34 is fixedly mounted on the bottom of each reset rod 33, and a reset spring 35 is fixedly mounted between the mounting plate 34 and the base 24, sleeved on the outer circumference of the reset rod 33. The top of the reset rod 33 is slidably connected to the disc 26. A guide groove 36 is formed along the circumference of the bottom surface of the disc 26, and a guide block 37 is integrally formed on the top of the reset rod 33, slidingly engaging with the guide groove 36. The lead screw 25 adopts a ball screw structure to reduce frictional resistance during the upward movement of the disc 26.

[0035] When the disc 26 moves vertically downwards, it drives the mounting plate 34 to move downwards synchronously via the guide block 37 and the reset rod 33, thereby stretching the reset spring 35. When the telescopic component 13 drives the connecting block 14 to move upwards, causing the connecting block 14 to drive the insertion rod 28 to move upwards and disengage from the through hole 27 on the disc 26, the reset spring 35 drives the mounting plate 34 to move upwards under its own reset force. The mounting plate 34 drives the disc 26 to move upwards synchronously via the reset rod 33. At this time, the guide block 37 slides along the guide groove 36 and drives the disc 26 to rotate and rise axially around the lead screw 25, thereby realizing the automatic reset of the disc 26, so that the position of the through hole 27 on the disc 26 corresponds with that of the insertion rod 28, ensuring that the insertion rod 28 is inserted into the through hole 27 on the disc 26 next time.

[0036] Working principle: The medicine to be weighed is placed in the weighing pan 6, and the cover plate 7 is flipped over to cover the weighing pan 6 inside. Then, the weight of the medicine is measured by four weight sensors 5, and the detected weight signal is converted into an electrical signal and transmitted to the control panel. The control panel processes the weight data and displays the reading for the operator to read intuitively.

[0037] After the medicine is weighed, the telescopic component 13 can drive the container bag 10 to move downwards via the connecting block 14 and the fixing block 16, so that the container bag 10 no longer blocks the through hole 8. At this time, the medicine falls into the container bag 10 through the through hole 8 under its own weight. Since the container bag 10 is in a relaxed state in this state, the falling medicine will cause the container bag 10 to undergo adaptive deformation, thereby preventing the medicine from slipping out of the container bag 10. As the telescopic component 13 continues to retract, the container bag 10 will be concave downwards, so that the medicine is concentrated in the concave area in the middle of the container bag 10 for centralized collection.

[0038] As the telescopic component 13 moves the connecting block 14 downward, the connecting block 14 simultaneously moves the insertion rod 28 downward, so that the insertion rod 28 is inserted into the perforation 27 of the disc 26. When the fixing block 16 is between the two limiting plates 17, the motor 12 is started. The motor 12 drives the telescopic component 13 to rotate. The telescopic component 13 drives the packaging bag 10 to rotate through the connecting block 14 and the fixing block 16, so as to tighten and seal the opening of the packaging bag 10, thereby forming a sealed package for the medicine after weighing, and isolating the medicine from the external environment.

[0039] As the telescopic component 13 drives the connecting block 14 to rotate, the connecting block 14 drives the disc 26 to rotate around the lead screw 25 via the insert rod 28. During rotation, the disc 26 descends synchronously along the axial direction of the lead screw 25, thereby driving the pressing rod 21 to move downwards vertically. When the bottom of the pressing rod 21 slides along the inclined groove 23 of the moving plate 22, the inclined groove 23 guides the two limiting plates 17 to move towards each other closer to the fixed block 16. This ensures that while the fixed block 16 is twisting and sealing the packaging bag 10, the two limiting plates 17 precisely clamp and limit the fixed block 16. The friction between the two limiting plates 17 and the fixed block 16 prevents the fixed block 16 from rotating in the opposite direction, ensuring a stable and tight seal at the opening of the packaging bag 10. This prevents the bag opening from becoming loose and open after the packaging bag 10 is tightly sealed due to the reverse rotation of the fixed block 16, thus preventing the quality of the medicine from being affected by the external environment. Subsequently, the telescopic component 13 continues to move downward, causing the magnet 15 on the connecting block 14 to disengage from the docking groove of the fixing block 16. After the sealing action is completed, the packaging bag 10 moves synchronously with the conveyor belt and enters the subsequent packaging process.

[0040] 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 weight detection device for pharmaceutical production, comprising a conveyor belt, characterized in that, The top of the conveyor belt is fixedly provided with a first support (4), the top of the first support (4) is fixedly provided with a weight sensor (5), the top of the weight sensor (5) is fixedly provided with a weighing pan (6), the top of the weighing pan (6) is provided with a conical groove, and the center of the conical groove is provided with a through hole (8). The top of the conveyor belt is provided with a second support (9) that moves with it, and the top of the second support (9) is detachably provided with a container bag (10). A motor (12) is fixedly installed on the conveyor belt, and a telescopic component (13) is fixedly installed at the output end of the motor (12). The telescopic end of the telescopic component (13) is detachably connected to the bottom of the container bag (10). The telescopic component (13) can drive the container bag (10) to move upward, so that the container bag (10) is inserted into the through hole (8) of the weighing pan (6) and the through hole (8) is blocked; and the telescopic component (13) can drive the container bag (10) to move downward, so that the medicine falls into the container bag (10) through the through hole (8) for collection. The motor (12) can drive the container bag (10) to rotate through the telescopic component (13) to achieve the tightening and sealing of the bag opening of the container bag (10); The second support (9) is also equipped with a limiting component to prevent the container (10) from loosening and opening after twisting.

2. The weight detection device for pharmaceutical production according to claim 1, characterized in that, The telescopic end of the telescopic component (13) is fixedly provided with a connecting block (14), the top of the connecting block (14) is fixedly provided with a magnet (15), and the bottom of the container bag (10) is fixedly provided with a fixing block (16). The fixing block (16) is made of magnetic material and can form a magnetic adsorption fit with the magnet (15).

3. The weight detection device for pharmaceutical production according to claim 2, characterized in that, The bottom surface of the fixing block (16) is provided with multiple docking slots, and there are multiple magnets (15) arranged on the top surface of the connecting block (14). The multiple magnets (15) correspond one-to-one with the multiple docking slots, and the magnets (15) can be inserted into the corresponding docking slots.

4. The weight detection device for pharmaceutical production according to claim 3, characterized in that, The limiting component includes two limiting plates (17) that are horizontally slidably disposed on the second bracket (9) and symmetrically arranged. The second bracket (9) is also provided with a transmission component, which is used to drive the two limiting plates (17) to move towards each other to form a clamping limit on the fixed block (16).

5. The weight detection device for pharmaceutical production according to claim 4, characterized in that, The transmission assembly includes two sliding rods (19) that are horizontally slidably arranged on the second bracket (9) and symmetrically arranged. Each of the two sliding rods (19) has a pressing rod (21) fixedly arranged at one end opposite to the other. The limiting plate (17) is integrally formed with a movable plate (22). The movable plate (22) has a groove (23) opened on it. The groove (23) slides with the pressing rod (21). The conveyor belt is provided with a driving assembly. The driving assembly can drive the pressing rod (21) to move downward in the vertical direction, and then drive the two limiting plates (17) to move towards each other through the sliding cooperation between the groove (23) and the pressing rod (21).

6. The weight detection device for pharmaceutical production according to claim 5, characterized in that, The drive assembly includes a base (24) fixedly mounted on the conveyor belt and a lead screw (25) fixedly mounted on the top of the base (24). The lead screw is coaxially rotated and sleeved on the outer periphery of the telescopic end of the telescopic component (13). A disc (26) is threadedly connected to the outer periphery of the lead screw (25). The disc (26) abuts against the lower pressure rod (21). A through hole (27) is provided on the disc (26). A plug rod (28) is fixedly mounted on the bottom of the connecting block (14). The plug rod (28) is inserted into the through hole (27).

7. The weight detection device for pharmaceutical production according to claim 6, characterized in that, Two symmetrically arranged reset rods (33) are slidably arranged on the base (24). A mounting plate (34) is fixedly arranged at the bottom of the reset rod (33). A reset spring (35) is fixedly arranged between the mounting plate (34) and the base (24). The top of the reset rod (33) is slidably connected to the disc (26).

8. The weight detection device for pharmaceutical production according to claim 4, characterized in that, The inner side of the limiting plate (17) is arc-shaped. The inner side of the limiting plate (17) is evenly provided with an installation groove (29) along its circumference. A limiting post (30) is slidably provided in the installation groove (29). The end face of the limiting post (30) extending out of the installation groove (29) is evenly provided with protrusions. A push spring (31) is fixedly provided between the limiting post (30) and the installation groove (29).

9. The weight detection device for pharmaceutical production according to claim 8, characterized in that, The outer periphery of the fixing block (16) is provided with a limiting groove (32) that is adapted to the limiting post (30).

10. The weight detection device for pharmaceutical production according to claim 1, characterized in that, The top of the first bracket (4) is hinged with a cover plate (7), which can cover the weighing pan (6) inside.

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