A multi-stage granule screening device for pill production

Abstract

The utility model relates to material screening technical field discloses a kind of granule multistage screening devices for pill production, including screening box, feed mechanism being installed in the top of screening box, multiple screen cloth being movably installed in the inside of screening box, the push mechanism that drive screen cloth shakes is provided below the screen cloth, the side of screening box is connected with resistance mechanism, the resistance mechanism is connected with push mechanism, the side of screening box is also equipped with the drive mechanism of driving resistance mechanism movement;Through the unique modeling design of push plate, and through motor drive push plate continuous rotation, push plate pushes resistance mechanism and push mechanism reciprocating movement at the bottom of screen cloth, and under the cooperation of rotating roller and resistance area, multiple screen cloth can be driven to carry out stable shaking screening continuously, and it is not necessary to stop cleaning screen cloth or sorting material, realize the efficient automatic production of pill screening;Make the two ends of screen cloth produce alternate undulation fluctuation, more soft and effective shock dispersion of adhering pill.

Description

Technical Field

[0001] This utility model relates to the field of material screening technology, specifically to a multi-stage particle screening device for pill production. Background Technology

[0002] In pharmaceutical preparation production, pill sieving specifically refers to a unit operation that uses one or more sieves with specific aperture surfaces to separate, classify, or remove impurities from a group of pill particles of mixed sizes according to their particle size.

[0003] A search revealed that patent application number CN202221356655.9 discloses a granule sieving device for pill production, relating to the field of medical equipment technology. The device includes a sieve frame body with a side opening on one side, extending to the other side of the sieve frame body. A sieve plate is slidably connected inside the side opening. A sliding groove is provided on the front side of the sieve frame body, with guide grooves on both the top and bottom surfaces of the sliding groove. Guide blocks are slidably connected inside both guide grooves. A movable block is fixed between opposite sides of the two guide blocks, with the rear side of the movable block fixed to the front side of the sieve plate. Two guide plates are fixed between the inner walls of both sides of the sieve frame body. By setting push plates inside the sieve frame, unqualified pills above the sieve plate can be cleaned, solving the problem that some sieving devices cannot promptly remove unqualified pills, requiring manual cleaning periodically and causing inconvenience in practical use.

[0004] Traditional pill screening devices use a limited vibration or shaking method, which cannot effectively solve the problems of pill particles sticking together and getting stuck in the screen holes due to static electricity, humidity, etc. Moreover, the blockage of the screen holes affects the screening accuracy and reduces the quality of the pills. Traditional screening devices are mostly single-layer screening devices, which cannot simultaneously screen and classify pills of different particle sizes. Multiple screening devices need to be connected in series and screened multiple times, which makes the process complicated and increases the cost of equipment. Therefore, we need to propose a multi-stage particle screening device for pill production. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage granule screening device for pill production. Through the mechanical linkage of the drive mechanism, the resisting mechanism, and the pushing mechanism, the single rotational power is converted into the driving force for continuous shaking of multiple layers of screens, thereby achieving automated, high-efficiency, and anti-clogging multi-stage pill screening and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage granule screening device for pill production, comprising a screening box, a feeding mechanism installed on the top of the screening box, and multiple screens movably installed inside the screening box. A pushing mechanism for driving the screens to vibrate is provided below the screens. A contact mechanism is connected to one side of the screening box, and the contact mechanism is connected to the pushing mechanism. A driving mechanism for driving the contact mechanism to move is also installed on one side of the screening box.

[0007] The pushing mechanism includes a push rod located below the screen, a rotating roller rotatably mounted on the push rod, and a contact area at the bottom of the screen that contacts the rotating roller. The contact area includes an arc-shaped groove and an arc-shaped block that seamlessly connects to the side of the arc-shaped groove.

[0008] Preferably, the inner wall of the screening box is provided with a slot, the screen is installed inside the slot, the upper surface of the screen is inclined, and both ends of the screening box are provided with discharge ports communicating with the slot.

[0009] Preferably, the top of the screening box is equipped with a cover plate, the feeding mechanism is installed on the cover plate, the feeding mechanism includes a feeding hopper, and a buffer plate is rotatably provided at the lower end of the inner wall of the feeding hopper to slow down the feeding speed of the pills.

[0010] Preferably, the driving mechanism includes two fixed plates connected to the side of the screening box, a rotating shaft is rotatably arranged between the two fixed plates, a motor for driving the rotating shaft is installed on one of the fixed plates, and multiple push plates are sleeved on the outer wall of the rotating shaft.

[0011] Preferably, the abutting mechanism includes a frame movably mounted on the screening box, one end of the frame being connected to a push rod, and the other end of the frame being rotatably equipped with a roller that abuts against the push plate. A spring is connected between the frame and the side of the screening box.

[0012] Preferably, a bottom plate is installed at the bottom of the screening box, and the upper surface of the bottom plate is inclined.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, through the unique shape design of the push plate, and through the continuous rotation of the push plate driven by the motor, pushes the contact mechanism and the pushing mechanism to move back and forth at the bottom of the screen. With the cooperation of the rotating roller and the contact area, it can drive the multi-layer screen to continuously and stably shake and screen without stopping the machine to clean the screen or sort the materials, thus realizing the efficient and automated production of pill screening.

[0015] 2. This utility model uses a rotating roller that rolls back and forth on the contact area (wave-shaped) to create alternating undulations at both ends of the screen, rather than simple linear vibration. This more gently and effectively disperses sticky pills and bounces up pill particles stuck in the screen holes, keeping the screen unobstructed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 This utility model Figure 1 Enlarged view of section A in the middle;

[0019] Figure 4 This is a schematic diagram of the structure of the contact mechanism and the pushing mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the sieve of this utility model;

[0021] Figure 6 This utility model Figure 5 Enlarged view of section B;

[0022] Figure 7 This is a schematic diagram of the structure of the screen and discharge port of this utility model.

[0023] In the diagram: 1. Screening box; 11. Slot; 12. Discharge port; 13. Base plate; 14. Cover plate; 2. Feeding mechanism; 21. Feed hopper; 22. Buffer plate; 3. Drive mechanism; 31. Fixing plate; 32. Motor; 33. Rotating shaft; 34. Push plate; 4. Contact mechanism; 41. Frame; 42. Roller; 43. Spring; 5. Screen; 51. Arc groove; 52. Arc block; 6. Pushing mechanism; 61. Push rod; 62. Rotating roller. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-7This utility model provides a technical solution: a multi-stage sieving device for pill production, including a sieving box 1, a feeding mechanism 2 installed on the top of the sieving box 1, and multiple screens 5 movably installed inside the sieving box 1. In this embodiment, the screens 5 are arranged in three layers, and the aperture of the screen holes on each layer of screens 5 is different. The first layer of screens 5 has the largest aperture and is used to sieve large-particle pills. The second layer of screens 5 has a moderate aperture and is used to sieve medium-particle pills. The third layer of screens 5 has the smallest aperture and is used to sieve small-particle pills.

[0026] Below the screen 5, there is a driving mechanism 6 that drives the screen 5 to shake. The driving mechanism 6 moves back and forth in a straight line below the screen 5. A contact mechanism 4 is connected to one side of the screening box 1. The contact mechanism 4 is connected to the driving mechanism 6. A driving mechanism 3 that drives the contact mechanism 4 to move is also installed on one side of the screening box 1, thereby driving the driving mechanism 6 to move back and forth.

[0027] The pushing mechanism 6 includes a push rod 61 located below the screen 5. Multiple push rods 61 are evenly spaced and are misaligned with the screen holes to avoid obstructing the drop of the pills. Two rotating rollers 62 are rotatably mounted on the push rod 61. The bottom of the screen 5 is provided with two contact areas that contact the rotating rollers 62. The contact areas are generally wavy.

[0028] The contact area includes an arc-shaped groove 51 and an arc-shaped block 52 that is seamlessly connected to the side of the arc-shaped groove 51. When one of the rotating rollers 62 is located in the arc-shaped groove 51 of one contact area, the other rotating roller 62 is located in the arc-shaped block 52 of another contact area, ensuring that the two ends of the screen 5 alternately undulate up and down, thereby achieving effective screening of the pills.

[0029] The inner wall of the screening box 1 is provided with a slot 11. The depth of the slot 11 is greater than the thickness of the screen 5, leaving enough space for the screen 5 to shake. The screen 5 is installed inside the slot 11. The upper surface of the screen 5 is inclined to facilitate the movement of the pills on the screen 5. Both ends of the screening box 1 are provided with discharge ports 12 that communicate with the slot 11. Specifically, the upper surface of the screen 5 is inclined towards the discharge port 12 to facilitate the discharge of the sieved pills that meet the size specifications from the discharge port 12.

[0030] In this embodiment, four discharge ports 12 are provided. The width of the multiple discharge ports 12 is different, and the width of the multiple discharge ports 12 gradually narrows from top to bottom. When the screen 5 is shaken, the gap between the screen 5 and the discharge port 12 is sufficient for the pills to be discharged, so as not to squeeze the pills or even cause the pills to be crushed.

[0031] The top of the screening box 1 is equipped with a cover plate 14, and the cover plate 14 has an installation hole. The feeding mechanism 2 is installed on the cover plate 14. The feeding mechanism 2 includes a feeding hopper 21, which is installed inside the installation hole. The lower end of the inner wall of the feeding hopper 21 is rotatably equipped with a buffer plate 22 to slow down the feeding speed of the pills.

[0032] It is worth noting that the buffer plate 22 includes a rotating column at the lower end of the inner wall of the feed hopper 21, and multiple guide plates are equidistantly arranged in a ring on the outer wall of the rotating column. After the pills enter from the feed hopper 21, they fall onto the guide plates and slide down onto the first layer of screen 5, which buffers the feeding of the pills and prevents the pills from breaking due to vertical falling.

[0033] The driving mechanism 3 includes two fixed plates 31 connected to the side of the screening box 1. A rotating shaft 33 is rotatably arranged between the two fixed plates 31. A motor 32 that drives the rotating shaft 33 to rotate is installed on one of the fixed plates 31. Multiple push plates 34 are sleeved on the outer wall of the rotating shaft 33.

[0034] Motor 32 drives shaft 33 and push plate 34 to rotate. The structure of push plate 34 is as follows: Figure 3 As shown, its surface is shaped like an equilateral triangle with chamfered corners and curved edges on the sides. That is, the push plate 34 includes three arc-shaped protrusions and three recesses, with the protrusions and recesses arranged alternately.

[0035] The contact mechanism 4 includes a frame 41 movably mounted on the screening box 1. One end of the frame 41 is connected to the push rod 61, and the other end of the frame 41 is rotatably provided with a roller 42. The roller 42 abuts against the push plate 34, and a spring 43 is connected between the frame 41 and the side of the screening box 1.

[0036] When the motor 32 is running, it changes from contacting the concave part with the roller 42 to contacting the convex part with the roller 42, pushing the contacting mechanism 4 closer to the screening box 1. Then, under the push of the spring 43, it changes to contacting the concave part with the roller 42. This is one complete screening action. This process is repeated to achieve continuous screening.

[0037] The bottom of the screening box 1 is equipped with a base plate 13, the upper surface of which is inclined. After screening, the fragments and fine powder materials smaller than the size of small pellets fall onto the inclined surface of the base plate 13 and are discharged from the bottom outlet 12.

[0038] In use, the pills are poured into the feed hopper 21 and slide down the inner wall of the feed hopper 21 to the rotating buffer plate 22, and then fall into the screening box 1 and onto the first screen 5. At the same time, the motor 32 is activated, which drives the rotating shaft 33 and the push plate 34 to rotate. The curved surfaces on the push plate 34 abut against and squeeze the roller 42, thereby pushing the frame 41 to move closer to the screening box 1. The spring 43 is compressed, and the frame 41 then drives the push rod 61 to move, so that the rotating roller 62 on the push rod 61 rolls on the contact area (wave-shaped) at the bottom of the screen 5. After the push rod 61 is pushed into place, the push plate 34 rotates exactly 60°, and then resets under the pushing force of the spring 43. This process is repeated, thereby causing the screen 5 to vibrate slightly, which plays a screening role for the pills.

[0039] Large-particle pills remain on the first screen 5, while the remaining pills fall onto the second screen 5. The sieving principle is the same as above. Medium-particle pills remain on the second screen 5, while small-particle pills continue to fall onto the third screen 5. The small-particle pills are intercepted by the third screen 5. The three different sizes of pills are discharged from different outlets 12.

[0040] The remaining debris and fine powder fall onto the bottom plate 13 at the bottom of the screening box 1 and slide out from the inclined surface of the bottom plate 13.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage granule screening device for pill production, characterized in that: Includes a screening box (1), a feeding mechanism (2) installed on the top of the screening box (1), and multiple screens (5) movably installed inside the screening box (1). A pushing mechanism (6) is provided below the screens (5) to drive the screens (5) to shake. A contact mechanism (4) is connected to one side of the screening box (1). The contact mechanism (4) is connected to the pushing mechanism (6). A driving mechanism (3) is also installed on one side of the screening box (1) to drive the contact mechanism (4) to move. The pushing mechanism (6) includes a push rod (61) located below the screen (5), a rotating roller (62) is rotatably mounted on the push rod (61), and a contact area is provided at the bottom of the screen (5) that contacts the rotating roller (62). The contact area includes an arc groove (51) and an arc block (52) that is seamlessly connected to the side of the arc groove (51).

2. The multi-stage granule screening device for pill production according to claim 1, characterized in that: The inner wall of the screening box (1) is provided with a slot (11), the screen (5) is installed inside the slot (11), the upper surface of the screen (5) is inclined, and both ends of the screening box (1) are provided with discharge ports (12) that communicate with the slot (11).

3. The multi-stage granule screening device for pill production according to claim 1, characterized in that: The top of the screening box (1) is equipped with a cover plate (14), and the feeding mechanism (2) is installed on the cover plate (14). The feeding mechanism (2) includes a feeding hopper (21), and a buffer plate (22) is rotatably provided on the lower end of the inner wall of the feeding hopper (21) to slow down the feeding speed of the pills.

4. The multi-stage granule screening device for pill production according to claim 1, characterized in that: The driving mechanism (3) includes two fixed plates (31) connected to the side of the screening box (1), and a rotating shaft (33) is rotatably arranged between the two fixed plates (31). A motor (32) for driving the rotating shaft (33) to rotate is installed on one of the fixed plates (31), and multiple push plates (34) are sleeved on the outer wall of the rotating shaft (33).

5. The multi-stage granule screening device for pill production according to claim 1, characterized in that: The contact mechanism (4) includes a frame (41) movably mounted on the screening box (1). One end of the frame (41) is connected to the push rod (61), and the other end of the frame (41) is rotatably provided with a roller (42). The roller (42) abuts against the push plate (34), and a spring (43) is connected between the frame (41) and the side of the screening box (1).

6. The multi-stage granule screening device for pill production according to claim 1, characterized in that: The bottom of the screening box (1) is equipped with a base plate (13), and the upper surface of the base plate (13) is inclined.

Images