Granularity screening device for Chinese patent medicine children's digestion-promoting granules
By installing an exhaust fan and an air supply pipe in the screening device, negative and positive pressure airflows are formed, which solves the problems of dust diffusion and screen plate clogging, and achieves efficient particle size screening and extended equipment maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-09
- Publication Date
- 2026-04-03
AI Technical Summary
Existing screening devices for pediatric digestive granules are prone to dust dispersion during the screening process, which affects the service life of the equipment, and the sieve plate is easily clogged.
A screen box with a swaying mechanism is designed, which includes a first screen plate and a second screen plate. A negative pressure and a positive pressure airflow are formed by using an exhaust fan and an air supply pipe. Dust is removed in advance through the exhaust pipe, and the airflow helps the particles pass through the screen holes to avoid clogging.
It effectively reduces dust diffusion, prevents screen plate clogging, improves screening efficiency, and extends equipment service life.
Smart Images
Figure CN121776103A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of screening device technology, specifically to a particle size screening device for pediatric digestive granules. Background Technology
[0002] In the industrial production process of pediatric digestive granules, particle size screening is a crucial step in ensuring drug quality. The material composition of pediatric digestive granules is quite unique, with its main components including extracts of traditional Chinese medicines such as hawthorn, malt, and Shenqu (a type of medicinal fermentation). After granulation and drying, these components are prone to forming unevenly sized granule clumps due to residual sticky substances (such as polysaccharides and organic acids) and electrostatic effects. Furthermore, fine powder easily forms on the granule surface. This characteristic presents an inherent challenge to subsequent screening processes. Existing particle size screening devices mostly employ a structure design with fixed sieve plates and vibration drive. In practical applications, after the drying process, fine powder adheres to the surface of the pediatric digestive granules. This fine powder easily detaches from the granule body during the vibration process of traditional screening devices, forming suspended dust. Since existing screening boxes are mostly semi-open or simply sealed structures, they lack targeted dust control design: dust spreads everywhere due to airflow disturbances within the box, and some dust adheres to the inner wall of the screening box, the surface of the vibration motor and transmission components. Long-term accumulation leads to decreased motor heat dissipation efficiency, accelerated wear of transmission components, shortened equipment lifespan, increased equipment maintenance costs, and increased downtime for repairs. Furthermore, the herbal extracts in pediatric digestive granules have a certain degree of viscosity, while existing screening mechanisms generally use a multi-layer sieve plate design. During the screening process, the dried granule clumps are easily squeezed by vibration, causing some semi-viscous fine powder to get stuck in the sieve holes of the first layer, affecting screening efficiency. Summary of the Invention
[0003] The purpose of this invention is to provide a particle size screening device for traditional Chinese medicine granules for children's digestion, which solves the following technical problems: dust is easily dispersed during the screening process of existing screening devices, which affects the service life of the equipment, and the sieve plate is easily blocked.
[0004] The objective of this invention can be achieved through the following technical solutions: A particle size screening device for pediatric digestive granules, a traditional Chinese medicine, includes a frame-shaped base, on which a swayable screening box is mounted. A feeding hose is connected to the top wall of the screening box, and one end of the feeding hose is connected to an external feeding mechanism. A first sieve plate and a second sieve plate are mounted inside the screening box. The second sieve plate is fixed inside the screening box, and multiple telescopic rods are fixed to the upper surface of the second sieve plate. The top ends of the multiple telescopic rods are all fixed to the first sieve plate. Both sides of the screening box are connected to an exhaust pipe and an air supply pipe, which are located between the first screen plate and the second screen plate. An exhaust fan is installed inside the exhaust pipe, and a filter box is installed on the exhaust pipe. A branch pipe is also connected to the exhaust pipe, one end of which is connected to the screening box, and the connection point is located above the first screen plate. Both sides of the lower surface of the first screen plate are connected to baffles by connecting rods.
[0005] As a further aspect of the present invention: the bottom of the screening box is a conical structure, a discharge pipe is provided at the bottom of the screening box, and a door is hinged to the side wall of the screening box.
[0006] As a further aspect of the present invention: the telescopic rod includes a sleeve, the bottom end of the sleeve is fixedly connected to the second sieve plate, a first spring is connected inside the sleeve, one end of the first spring is connected to a movable rod, and one end of the movable rod is fixedly connected to the first sieve plate.
[0007] As a further aspect of the present invention: a notch is provided on the side wall of the frame-shaped base, and a collection box is movably disposed within the notch, the collection box being located directly below the discharge pipe.
[0008] As a further aspect of the present invention, cover plates are provided on both sides of the discharge pipe.
[0009] As a further aspect of the present invention: a plurality of sliders are slidably connected to the frame-shaped base, and the sliders are fixedly connected to the side wall of the screening box. A motor is installed on one inner wall of the frame-shaped base, and the output shaft of the motor is connected to a cam, and the cam is in contact with the side wall of the screening box. A second spring is connected between the other inner wall of the frame-shaped base and the screening box.
[0010] As a further aspect of the present invention: a filter screen is provided inside the air supply pipe, and the air supply pipe is located below the air extraction pipe.
[0011] The beneficial effects of this invention are: (1) By setting a first sieve plate, the first sieve plate is relatively high in the initial state. When the pediatric digestive granules fall from the feeding hose, dust splashing caused by excessive falling distance can be avoided. At the same time, with the basic air extraction of the branch pipe, a small amount of dust generated during the feeding process can be sucked into the filter box in advance, reducing dust diffusion from the source. (2) When the first sieve plate of the present invention floats up and down with the weight of the particles, after the particles are fed, the first sieve plate sinks and the baffle is removed from the air extraction pipe. The negative pressure enhances the air extraction, and the dispersed fine powder is promptly removed to prevent dust from circulating and accumulating in the box. At the same time, the downward airflow and the gravity of the particles form a dual force, which provides a precise "boost" to the qualified "semi-suspended" particles stuck at the edge of the sieve hole, making it easier for them to overcome the resistance of the sieve hole and pass through the sieve plate. This is especially useful for particles in children's digestive granules that are difficult to pass through due to slight adhesion of sticky components (such as hawthorn extract), thus preventing the first sieve plate from being blocked. (3) The present invention sets the screen to float as the screening proceeds, increasing the space between the first and second screen plates. Clean air from the outside flows in through the air supply pipe, forming an upward airflow that can "lift" the particles accumulated on the screen surface, preventing the particles from clumping due to excessive negative pressure. At the same time, the airflow impact can effectively break up the sticky clumps commonly found in children's digestive granules, fundamentally reducing the probability of clumps clogging the screen holes. Attached Figure Description
[0012] The invention will now be further described with reference to the accompanying drawings.
[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the screening box of the present invention; Figure 3 This is a schematic diagram of the internal structure of the screening box of the present invention; Figure 4 yes Figure 2 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the structure of the first sieve plate and the second sieve plate of the present invention in a disassembled state; Figure 6 This is a schematic diagram of the structure of the first sieve plate and the baffle of the present invention; Figure 7 This is a schematic diagram of the telescopic rod of the present invention; Figure 8 This is a schematic diagram of the frame-shaped base of the present invention.
[0014] In the diagram: 1. Frame-shaped base; 2. Screening box; 3. Feed hose; 4. Box door; 5. Discharge pipe; 6. Cover plate; 7. First screen plate; 8. Second screen plate; 9. Telescopic rod; 10. Exhaust pipe; 11. Filter box; 12. Exhaust fan; 13. Branch pipe; 14. Air supply pipe; 15. Connecting rod; 16. Baffle; 17. Slider; 18. Motor; 19. Cam; 20. Second spring; 22. Collection box; 901. Sleeve; 902. First spring; 903. Movable rod.
[0015] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the invention. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual size and shape of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation
[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0017] Please see Figures 1 to 6As shown, this invention is a particle size screening device for pediatric digestive granules, including a frame-shaped base 1. A swayable screening box 2 is mounted on the frame-shaped base 1. A feeding hose 3 is connected to the top wall of the screening box 2, and one end of the feeding hose 3 is connected to an external feeding mechanism. A first sieve plate 7 and a second sieve plate 8 are arranged inside the screening box 2. The second sieve plate 8 is fixed inside the screening box 2, and multiple telescopic rods 9 are fixed to the upper surface of the second sieve plate 8. The top ends of the multiple telescopic rods 9 are all fixed to the first sieve plate 7. An exhaust pipe 10 and a supplementary air pipe 14 are connected to both side walls of the screening box 2. The exhaust pipe 10 and the supplementary air pipe 14 are located between the first sieve plate 7 and the second sieve plate 8. An exhaust fan 12 is installed inside the exhaust pipe 10. A filter box 11 is installed, and a branch pipe 13 is connected to the exhaust pipe 10. One end of the branch pipe 13 is connected to the screening box 2, and the connection point is located above the first screen plate 7. Both sides of the lower surface of the first screen plate 7 are connected to baffles 16 through connecting rods 15. A filter screen is installed inside the air supply pipe 14, and the air supply pipe 14 is located below the exhaust pipe 10. In the initial state, under the action of the telescopic rod 9, the first screen plate 7 is at its highest point, and the baffles 16 block the exhaust pipe 10. First, the external feeding mechanism and the feeding hose 3 are used to quantitatively feed particles into the screening box 2 and start the exhaust fan 12. The branch pipe 13 can suck a small amount of dust generated during the feeding process into the filter box 11 in advance. The particles fall on the first screen plate 7 and are then subjected to gravity. As the first sieve plate 7 descends a certain distance, it causes the baffle plate 16 to descend as well. At this time, the exhaust pipe 10 operates normally, and the space between the first sieve plate 7 and the second sieve plate 8 decreases. The airflow then flows downward and is discharged through the exhaust pipe 10. This process removes the dust generated during screening and, under the combined effect of gravity and airflow pressure, the particles pass through the sieve holes more easily. This is especially beneficial for "semi-suspended" qualified particles (those stuck at the edges of the sieve holes), creating a "boosting" effect. Larger particles are intercepted by the first sieve plate 7 and fall onto the second sieve plate 8. Qualified particles are intercepted by the second sieve plate 8, while smaller particles fall below the screening box 2 through the second sieve plate 8. As the screening continues, the particles on the first sieve plate 7... The particle mass is greatly reduced. Under the action of the telescopic rod 9, the first screen plate 7 moves upward. At this time, the baffle 16 will gradually block the air extraction pipe 10, the space between the first screen plate 7 and the second screen plate 8 will increase, the air extraction intensity will decrease, and clean air from the outside will rush in quickly through the air supply pipe 14 to form an upward airflow, which will "lift" the particles accumulated on the first screen plate 7 and prevent the particles from being excessively compacted due to negative pressure. At the same time, the airflow impact will break up the small clumps adhering to the surface (such as the sticky clumps formed by hawthorn extract). After the first batch of particles is screened, the particles are transported again by the external feeding mechanism for the next screening. It is worth noting that the external feeding mechanism is existing technology and automatically performs quantitative feeding. The specific structure will not be described in detail here.
[0018] See Figure 2The bottom of the screening box 2 is conical, and a discharge pipe 5 is provided at the bottom of the screening box 2. A door 4 is hinged to the side wall of the screening box 2. A notch is provided on the side wall of the frame base 1, and a collection box 22 is movably installed in the notch. The collection box 22 is located directly below the discharge pipe 5. Cover plates 6 are provided on both sides of the discharge pipe 5. Smaller particles enter the collection box 22 through the discharge pipe 5. The cover plates 6 can prevent small particles from spreading to the outside after falling. The particles on the first screen plate 7 and the second screen plate 8 can be collected by periodically opening the door 4.
[0019] See Figure 3 , Figure 6 and Figure 7 The telescopic rod 9 includes a sleeve 901, the bottom end of which is fixedly connected to the second sieve plate 8. A first spring 902 is connected inside the sleeve 901. One end of the first spring 902 is connected to a movable rod 903, and one end of the movable rod 903 is fixedly connected to the first sieve plate 7. The first sieve plate 7 is supported by the elastic force of the first spring 902. After the particles fall onto the first sieve plate 7, the first spring 902 is compressed, and the first sieve plate 7 descends.
[0020] See Figure 1 and Figure 8 Multiple sliders 17 are slidably connected to the frame-shaped base 1, and the sliders 17 are fixedly connected to the side wall of the screening box 2. A motor 18 is installed on one inner wall of the frame-shaped base 1, and the output shaft of the motor 18 is connected to a cam 19, which is in contact with the side wall of the screening box 2. A second spring 20 is connected between the other inner wall of the frame-shaped base 1 and the screening box 2. When the motor 18 is started, it drives the cam 19 to rotate, which, in conjunction with the second spring 20, pushes the screening box 2 to shake back and forth, thereby improving the screening efficiency.
[0021] The working principle of this invention: In the initial state, the telescopic rod 9 supports the first sieve plate 7, so that the first sieve plate 7 is at the highest point. At this time, the baffle 16 blocks the exhaust pipe 10. During operation, the pediatric digestive granules are first quantitatively fed into the screening box 2 through the external feeding mechanism (not shown) in conjunction with the feeding hose 3, and the exhaust fan 12 in the exhaust pipe 10 is started. The branch pipe 13 on the exhaust pipe 10 will suck a small amount of dust generated during the feeding process into its own filter box 11 in advance. The feeding hose 3 is equipped with a valve. After the quantitative feeding is completed, the valve is closed. After the particles fall onto the first sieve plate 7, under the action of gravity, the first spring 902 inside the telescopic rod 9 is compressed, and the movable rod 903 moves down along the sleeve 901, causing the first sieve plate 7 to descend synchronously. This, in turn, causes the baffle 16 to descend, allowing the exhaust pipe 10 to be unblocked and operate normally. At this time, the space between the first sieve plate 7 and the second sieve plate 8 fixed in the screening box 2 decreases, and the airflow moves downward and is discharged through the exhaust pipe 10. This airflow, on the one hand, extracts the dust generated during the screening process, and on the other hand, makes it easier for the particles to pass through the sieve holes of the first sieve plate 7 under the combined action of their own gravity and airflow pressure, thus improving the performance of the "semi-suspended" particles. The "floating" qualified particles create a "boosting" effect. Larger particles are intercepted by the first screen plate 7. After being screened by the first screen plate 7, the particles fall onto the second screen plate 8. Qualified particles are intercepted by the second screen plate 8, while smaller particles fall through the second screen plate 8 into the conical bottom of the screening box 2 and enter the collection box 22 through the discharge pipe 5 at the bottom. At the same time, the motor 18 is started, and the cam 19 connected to the output shaft of the motor 18 rotates. In conjunction with the second spring 20 and multiple sliders 17 that are slidably connected to the frame base 1 and fixed to the side wall of the screening box 2, the screening box 2 is pushed to shake back and forth to improve the screening efficiency. As screening proceeds, the particle mass on the first screen plate 7 decreases, the first spring 902 inside the telescopic rod 9 resets, and drives the movable rod 903 and the first screen plate 7 to move upward. At this time, the baffle 16 will gradually re-seal the exhaust pipe 10, the space between the first screen plate 7 and the second screen plate 8 increases, the exhaust intensity decreases, and clean air from the outside rushes into the screening box 2 through the air supply pipe 14 with a filter screen below the exhaust pipe 10, forming an upward airflow. This airflow "lifts" the particles accumulated on the first screen plate 7 to prevent the particles from being excessively compacted due to negative pressure, and at the same time impacts and breaks up the small clumps adhering to the surface. After the first batch of particles is screened, particles are fed into the screening box 2 again through the external feeding mechanism, and the above process is repeated for the next screening. The hinged door 4 on the side wall of the screening box 2 is opened periodically to collect the particles on the first screen plate 7 and the second screen plate 8, and the filter box 11 and the collection box 22 are cleaned periodically.
[0022] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.
Claims
1. A particle size screening device for pediatric digestive granules, comprising a frame-shaped base (1), wherein a swayable screening box (2) is provided on the frame-shaped base (1), characterized in that, The top wall of the screening box (2) is connected to a feeding hose (3), one end of which is connected to an external feeding mechanism. The screening box (2) is provided with a first screen plate (7) and a second screen plate (8). The second screen plate (8) is fixed inside the screening box (2). Multiple telescopic rods (9) are fixed on the upper surface of the second screen plate (8). The top ends of the multiple telescopic rods (9) are all fixed to the first screen plate (7). The screening box (2) is connected to both sides of the air extraction pipe (10) and the air replenishment pipe (14). The air extraction pipe (10) and the air replenishment pipe (14) are located between the first screen plate (7) and the second screen plate (8). An air extraction fan (12) is installed inside the air extraction pipe (10). A filter box (11) is installed on the air extraction pipe (10). A branch pipe (13) is also connected to the air extraction pipe (10). One end of the branch pipe (13) is connected to the screening box (2), and the connection point is located above the first screen plate (7). Both sides of the lower surface of the first screen plate (7) are connected to baffles (16) by connecting rods (15).
2. The particle size screening device for pediatric digestive granules according to claim 1, characterized in that, The bottom of the screening box (2) is a conical structure, and the bottom of the screening box (2) is provided with a discharge pipe (5). The side wall of the screening box (2) is hinged with a box door (4).
3. The particle size screening device for pediatric digestive granules according to claim 1, characterized in that, The telescopic rod (9) includes a sleeve (901), the bottom end of which is fixedly connected to the second sieve plate (8), and a first spring (902) is connected inside the sleeve (901). One end of the first spring (902) is connected to a movable rod (903), and one end of the movable rod (903) is fixedly connected to the first sieve plate (7).
4. The particle size screening device for pediatric digestive granules according to claim 2, characterized in that, The side wall of the frame base (1) is provided with a notch, and a collection box (22) is movably installed in the notch. The collection box (22) is located directly below the discharge pipe (5).
5. The particle size screening device for pediatric digestive granules according to claim 4, characterized in that, Cover plates (6) are provided on both sides of the discharge pipe (5).
6. The particle size screening device for pediatric digestive granules according to claim 1, characterized in that, Multiple sliders (17) are slidably connected to the frame base (1), and the sliders (17) are fixedly connected to the side wall of the screening box (2). A motor (18) is installed on one inner wall of the frame base (1), and the output shaft of the motor (18) is connected to a cam (19), and the cam (19) is in contact with the side wall of the screening box (2). A second spring (20) is connected between the other inner wall of the frame base (1) and the screening box (2).
7. The particle size screening device for pediatric digestive granules according to claim 1, characterized in that, The air supply pipe (14) is equipped with a filter screen, and the air supply pipe (14) is located below the air extraction pipe (10).