Rotary screen for hard capsule processing

Abstract

This utility model provides a rotary screen for processing hard capsules, belonging to the technical field of pharmaceutical processing equipment. The rotary screen has a simple and ingenious structure, resulting in excellent material screening. The screening tank is a hollow disc shape, with a screen plate at the bottom and a feeding nozzle on the top. A drive motor is fixedly mounted on a support base. A shaft is coaxially fixed at the center of the outer bottom surface of the screen plate, and the shaft is driven by the drive shaft of the drive motor. A fine material trough is located below the screen plate, and a discharge port is located at the outer edge of the screening tank. A coarse material trough surrounds the outer edge of the screening tank. When the drive motor operates, it drives the screening tank to rotate and screen. Fine material falls through the screen plate into the fine material trough, while coarse material falls through the discharge port into the coarse material trough. This rotary screen provides excellent screening, saves space, and allows for rapid and non-clogging material discharge.

Description

Technical Field

[0001] This utility model belongs to the technical field of pharmaceutical processing equipment, and in particular relates to a rotary screen for processing hard capsules. Background Technology

[0002] When processing the hard capsules of Shenling Tongluo Capsules, a traditional Chinese medicine, the raw materials need to be decocted, concentrated, dried, and granulated. The resulting medicine is then filled into capsule shells to obtain hard capsule granules.

[0003] To ensure that the medicine can be better absorbed and exert its efficacy, it is necessary to control the particle size of the medicine filling the capsule shell. Oversized particles will affect the timely absorption of the medicine. Therefore, a sieving device that can control the particle size of the medicine is needed to meet the needs of production and processing. Utility Model Content

[0004] To address the problems existing in the background art, this utility model provides a rotary screen for hard capsule processing. The rotary screen has a simple and ingenious structure and good material screening effect.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a rotary screen for hard capsule processing, including a screening tank, a coarse material trough, a support base, a fine material trough, and a drive motor. The screening tank is a hollow disc shape, the bottom plate of the screening tank is a screen plate, and a feeding nozzle is opened at the center of the top plate of the screening tank. The drive motor is fixedly installed on the support base. A shaft is coaxially fixed at the center of the outer bottom surface of the screen plate, and the shaft is driven and connected to the drive shaft of the drive motor. The fine material trough is annularly arranged below the screen plate and is fixedly connected to the support base. Multiple discharge ports that are open inside and outside are opened at the outer edge of the screening tank. The coarse material trough is annularly arranged around the outer edge of the screening tank. The bottom of the coarse material trough is fixedly connected to the support base. When the drive motor runs, it drives the screening tank to rotate and screen the material. The fine material falls through the screen plate into the fine material trough and is concentrated. The coarse material falls through the discharge port into the coarse material trough and is concentrated.

[0006] The screen plate is inclined in a manner that gradually rises radially outward from the center. The inclination of the screen plate is 'a', where 0° < a ≤ 5°. The inclined screen plate increases the resistance to material sliding, which can effectively prevent the material from sliding out of the screening tank quickly due to centrifugal force and not being fully screened.

[0007] The bottom surface of the screen plate is supported by an annular material hopper. The upper opening of the material hopper is fixedly connected to the screen plate and covers all the screen holes of the screen plate. The lower opening of the material hopper is narrowed and inserted into the open opening above the fine material trough.

[0008] The feeding nozzle is shaped like a wide-mouthed trumpet, and a material dispersing cone is fixedly installed on the screen plate directly below the feeding nozzle. The material dispersing cone is conical.

[0009] The bottom of the fine material trough is symmetrically inclined radially downward from the diameter where the center line is located. Two discharge ports are symmetrically opened at the lower edge of the outer wall of the fine material trough. The two discharge ports are located at the two lowest points of the bottom of the fine material trough. The outer bottom surface of the fine material trough is fixed on the support base by multiple support legs.

[0010] The bottom of the coarse material trough is symmetrically inclined radially downward from the diameter of the center line to both sides. The coarse material trough has a discharge port at the two lowest points of the bottom. The downward inclination direction of the bottom plate of the coarse material trough is offset from the downward inclination direction of the bottom plate of the fine material trough. The outer bottom surface of the coarse material trough is fixed on the support base by multiple legs. The multiple legs are arranged to avoid the discharge port and the discharge port.

[0011] Multiple discharge ports are evenly distributed around the axis of the screening tank. A guide plate is fixedly installed on the same side edge of each discharge port. Each guide plate is located on the rear side edge in the rotation direction of the discharge port. Each guide plate is set at the same height as the inner cavity of the screening tank. One end of each guide plate extends into the inner side of the screening tank in the horizontal direction, and the other end extends out to the outer side of the screening tank and is located in the coarse material trough.

[0012] A baffle plate is fixedly installed at the edge of the outer bottom surface of the screening tank. The baffle plate is inclined from top to bottom away from the axis of the screening tank. The lower edge of the baffle plate is inserted into the coarse material trough to seal the gap between the screening tank and the coarse material trough.

[0013] The upper end of the coarse material trough is open and symmetrically hinged with two material-stopping flaps, each of which is semi-circular.

[0014] Multiple diagonal tie rods are fixedly installed on the outer circular surface of the shaft. One end of the diagonal tie rod is fixedly connected to the shaft, and the other end of the diagonal tie rod is fixedly supported on the side wall of the hopper.

[0015] The beneficial effects of this utility model are as follows: This rotary screen changes the original horizontal screening method to a rotary screening method to perform the screening process, effectively saving the space occupied by the equipment; the rotary screen is directly driven by a motor, resulting in low noise; the inclined screen plate effectively controls the screening rate and improves the screening quality; both the coarse and fine material troughs are inclined, facilitating the rapid discharge of materials and avoiding the problem of material accumulation and poor discharge; the guide plate at the discharge port promotes the discharge of coarse materials; and the hinged baffle cover prevents materials from flying out. Attached Figure Description

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 3This is a schematic diagram of the structure of the screening tank of this utility model (partial cut-off of the screening tank);

[0020] Figure 4 This is a cross-sectional view of the overall structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the bottom structure of this utility model (partially cut off the support base);

[0022] In the diagram: 1. Screening tank; 2. Baffle cover; 3. Coarse material trough; 4. Support base; 5. Fine material trough; 6. Drive motor; 11. Feeding nozzle; 12. Screen plate; 13. Dispersing cone; 14. Guide plate; 15. Discharge port; 16. Gathering hopper; 17. Shaft; 18. Diagonal tie rod; 19. Baffle plate; 31. Drop port; 41. Support leg one; 42. Support leg two; 51. Discharge port. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0024] A rotary screen for processing hard capsules includes a screening tank 1, a coarse material trough 3, a support base 4, a fine material trough 5, and a drive motor 6. The screening tank 1 is a hollow disc shape, with a screen plate 12 as its bottom plate and a feeding nozzle 11 at the center of its top plate. The drive motor 6 is fixedly mounted on the support base 4. A shaft 17 is coaxially fixed at the center of the outer bottom surface of the screen plate 12, and the shaft 17 is drivenly connected to the drive shaft of the drive motor 6. The fine material trough 5 is annular and receives material from the coarse material. The screen hopper 1 is set below the screen plate 12 and fixedly connected to the support base 4. Multiple discharge ports 15 are opened on the outer edge of the screen hopper 1, which are connected inside and out. The coarse material trough 3 is arranged in a ring around the outer edge of the screen hopper 1. The coarse material trough 3 is fixedly connected to the support base 4 below. When the drive motor 6 is running, it drives the screen hopper 1 to rotate and screen the material. Fine material falls through the screen plate 12 into the fine material trough 5 and is concentrated. Coarse material falls through the discharge port 15 into the coarse material trough 3 and is concentrated, thereby completing the screening of fine and coarse materials.

[0025] The screen plate 12 is inclined in a manner that gradually rises radially outward from the center. The inclination of the screen plate 12 is a, where 0° < a ≤ 5°. The inclined screen plate 12 increases the resistance to material sliding, which can effectively prevent the material from sliding out of the screening tank 1 quickly due to centrifugal force and not being screened sufficiently. The inclination angle is limited to prevent the coarse material from sliding out smoothly due to an excessively large inclination angle.

[0026] The outer bottom surface of the sieve plate 12 is supported by an annular material hopper 16. The upper opening of the material hopper 16 is fixedly connected to the sieve plate 12 and covers all the sieve holes of the sieve plate 12. The narrow opening at the bottom of the material hopper 16 is inserted into the open opening above the fine material trough 5. The screened fine material falls onto the material hopper 16 and slides into the fine material trough 5.

[0027] The feeding nozzle 11 is shaped like a wide-mouthed trumpet. A material dispersing cone 13 is fixedly installed on the screen plate 12 directly below the feeding nozzle 11. The material dispersing cone 13 is conical. The material to be screened added through the feeding nozzle 11 is first sprayed onto the material dispersing cone 13, which then disperses the material onto the screen plate 12, effectively avoiding the accumulation of material caused by direct addition and affecting the screening efficiency.

[0028] The bottom of the fine material trough 5 is symmetrically inclined radially downward from the diameter where the center line is located, forming a trough bottom that is high in the middle and low on both sides. Two discharge ports 51 are symmetrically opened at the lower edge of the outer wall of the fine material trough 5. The two discharge ports 51 are respectively located at the two lowest points of the bottom of the fine material trough 5. The outer bottom surface of the fine material trough 5 is fixed on the support base 4 by multiple support legs 42. After the screened fine material is concentrated in the fine material trough 5, the fine material slides down the inclined bottom of the trough to the lowest point and is discharged from the fine material trough 5 through the discharge ports 51.

[0029] The bottom of the coarse material trough 3 is symmetrically inclined radially downward from the diameter of the center line to both sides, forming a bottom that is high in the middle and low on both sides. The coarse material trough 3 has a discharge port 31 at the two lowest points of the bottom. The screened coarse material falls into the coarse material trough 3 and slides along the bottom of the trough to the discharge port 31 for discharge. The downward inclination direction of the bottom plate of the coarse material trough 3 is offset from the downward inclination direction of the bottom plate of the fine material trough 5. The outer bottom surface of the coarse material trough 3 is fixed on the support base 4 by multiple support legs 41. The multiple support legs 41 are arranged to avoid the discharge port 51 and the discharge port 31.

[0030] Multiple discharge ports 15 are evenly distributed around the axis of the screening tank 1. A guide plate 14 is fixedly installed on the same side edge of each discharge port 15. Each guide plate 14 is located on the rear side edge in the rotation direction of the discharge port 15. Each guide plate 14 is set at the same height as the inner cavity of the screening tank 1. One end of each guide plate 14 extends into the inner side of the screening tank 1 in the horizontal direction, and the other end extends out to the outer side of the screening tank 1 and is located in the coarse material trough 3.

[0031] When the screening tank 1 rotates to screen materials, the coarse material slides to the discharge port 15 and is intercepted and guided by the guide plate 14 into the coarse material trough 3. The guide plate 14 is set on the rear side of the discharge port 15 in the direction of rotation. That is, when the screening tank 1 rotates to screen, the coarse material slides to the discharge port 15 under the action of centrifugal force. Without the guide plate 14, some coarse material would not be able to slide out smoothly when passing the discharge port 15 and would remain in the screening tank 1. However, the guide plate 14 blocks and intercepts one side edge of the discharge port 15, intercepts and guides the coarse material, and promotes the discharge of the coarse material.

[0032] A baffle plate 19 is fixedly installed at the edge of the outer bottom surface of the screening tank 1. The baffle plate 19 is inclined in a direction that gradually moves away from the axis of the screening tank 1 from top to bottom. The lower edge of the baffle plate 19 is inserted into the coarse material trough 3 to seal the gap between the screening tank 1 and the coarse material trough 3. The baffle plate 19 effectively prevents the material from leaking out along the gap.

[0033] The upper end of the coarse material trough 3 is symmetrically hinged with two baffle flaps 2. Each baffle flap 2 is semi-circular. When both baffle flaps 2 are flipped and placed on the coarse material trough 3, they form a complete ring to completely seal the opening of the coarse material trough 3 and intercept the material sliding out of the screening tank 1 to prevent leakage.

[0034] Multiple inclined tie rods 18 are fixedly installed on the outer circular surface of the shaft 17. One end of the inclined tie rod 18 is fixedly connected to the shaft 17, and the other end of the inclined tie rod 18 is fixedly supported on the side wall of the material hopper 16. The installation of multiple inclined tie rods 18 improves the connection and installation stability of the screening tank 1, thereby improving the rotation stability of the screening tank 1.

[0035] Working principle: When the rotary screen is in operation, the drive motor 6 is started by powering on, which in turn drives the screen material tank 1 to rotate. The material to be screened is added into the screen material tank 1 from the feeding nozzle 11. The rotating screen material tank 1 screens the material. Using external collection boxes and other containers, fine and coarse materials are collected from the discharge port 51 and the drop port 31, respectively. Fine materials with the standard particle size are filled into capsules, while coarse materials with the standard particle size are crushed again and screened repeatedly.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rotary screen for hard capsule processing, characterized by: The system includes a screening tank (1), a coarse material trough (3), a support base (4), a fine material trough (5), and a drive motor (6). The screening tank (1) is a hollow disc shape. The bottom plate of the screening tank (1) is a screen plate (12). A feeding nozzle (11) is opened at the center of the top plate of the screening tank (1). The drive motor (6) is fixedly installed on the support base (4). A shaft (17) is coaxially fixed at the center of the outer bottom surface of the screen plate (12). The shaft (17) is driven and connected to the drive shaft of the drive motor (6). The fine material trough (5) is circular. The ring-shaped support is set below the screen plate (12) and fixedly connected to the support base (4). Multiple discharge ports (15) with internal and external connections are opened at the outer edge of the screen tank (1). The coarse material trough (3) is arranged in a circular ring around the outer edge of the screen tank (1). The coarse material trough (3) is fixedly connected to the support base (4) below. When the drive motor (6) runs, it drives the screen tank (1) to rotate and screen the material. The fine material falls through the screen plate (12) into the fine material trough (5) and the coarse material falls through the discharge port (15) into the coarse material trough (3).

2. A rotary screen for hard capsule processing according to claim 1, characterized in that: The sieve plate (12) is inclined in a manner that gradually rises radially outward from the center, and the inclination of the sieve plate (12) is a, where 0° < a ≤ 5°.

3. A rotary screen for hard capsule processing according to claim 2, characterized in that: The bottom surface of the sieve plate (12) is supported by an annular material hopper (16). The upper opening of the material hopper (16) is fixedly connected to the sieve plate (12) and covers all the sieve holes of the sieve plate (12). The narrowed opening below the material hopper (16) is inserted into the open opening above the fine material trough (5).

4. A rotary screen for processing hard capsules according to claim 3, characterized in that: The feeding nozzle (11) is shaped like a trumpet with a wide opening at the top. A material dispersing cone (13) is fixedly installed on the screen plate (12) directly below the feeding nozzle (11). The material dispersing cone (13) is conical.

5. A rotary screen for hard capsule processing according to claim 4, characterized in that: The bottom of the fine material trough (5) is symmetrically inclined downwards radially from the diameter where the center line is located. Two discharge ports (51) are symmetrically opened at the lower edge of the outer wall of the fine material trough (5). The two discharge ports (51) are located at the two lowest points of the bottom of the fine material trough (5). The outer bottom surface of the fine material trough (5) is fixed on the support base (4) by multiple support legs (42).

6. A rotary screen for hard capsule processing according to claim 5, characterized in that: The bottom of the coarse material trough (3) is symmetrically inclined radially downward from the diameter where the center line is located. The coarse material trough (3) has a discharge port (31) at the two lowest points of the bottom. The downward inclination direction of the bottom plate of the coarse material trough (3) is offset from the downward inclination direction of the bottom plate of the fine material trough (5). The outer bottom surface of the coarse material trough (3) is fixed on the support base (4) by multiple support legs (41). The multiple support legs (41) are arranged to avoid the discharge port (51) and the discharge port (31).

7. A rotary screen for hard capsule processing according to claim 6, characterized in that: Multiple discharge ports (15) are evenly distributed around the axis of the screen tank (1). A guide plate (14) is fixedly installed on the same side edge of each discharge port (15). Each guide plate (14) is located on the rear side edge of the discharge port (15) in the rotation direction. Each guide plate (14) is set at the same height as the inner cavity of the screen tank (1). One end of each guide plate (14) extends into the inner side of the screen tank (1) in the horizontal direction, and the other end extends out to the outside of the screen tank (1) and is located in the coarse material trough (3).

8. A rotary screen for hard capsule processing according to claim 1 or 7, characterized in that: A baffle plate (19) is fixedly installed at the edge of the outer bottom surface of the screening tank (1). The baffle plate (19) is inclined in a direction that gradually moves away from the axis of the screening tank (1) from top to bottom. The lower edge of the baffle plate (19) is inserted into the coarse material trough (3) to seal the gap between the screening tank (1) and the coarse material trough (3).

9. A rotary screen for hard capsule processing according to claim 8, characterized in that: The upper end of the coarse material trough (3) is open and symmetrically hinged with two material-blocking flaps (2), each of which is semi-circular.

10. A rotary screen for hard capsule processing according to claim 3, characterized in that: Multiple inclined tie rods (18) are fixedly installed on the outer circular surface of the shaft (17). One end of the inclined tie rod (18) is fixedly connected to the shaft (17), and the other end of the inclined tie rod (18) is fixedly supported on the side wall of the hopper (16).

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