Pulverizer for pharmaceutical production

Abstract

The utility model relates to the technical field of medicine production, and discloses a powder mill for medicine production, which comprises a drying box, a stirring and drying component arranged in the drying box, a treatment box connected to the bottom of the drying box, a switch component arranged at the lower end of the treatment box, and grinding rollers symmetrically arranged in the treatment box in a rotating manner, a first motor is connected to the shaft end of one side of the grinding roller outside the treatment box, a sieve plate is arranged below the grinding roller, a material returning mechanism is arranged on one side of the treatment box, and a collecting box is slidably installed on one side of the lower portion of the treatment box; the material returning mechanism comprises a material conveying shell, a material conveying auger is rotationally installed in the material conveying shell, a transmission cavity is formed in the lower end of the material conveying shell, a material returning opening and a discharging opening which communicate with the material conveying shell are formed in the upper portion and the lower portion of one side of the treatment box correspondingly, and the discharging opening is located above the transmission cavity; the second motor drives the sieve plate to shake and screen and the conveying auger to conduct secondary grinding on large-particle returned medicine, the telescopic rod is combined to drive the arc-shaped plate to control discharging, efficiency is improved, and automatic operation is achieved.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical production technology, and in particular to a grinding mill for pharmaceutical production. Background Technology

[0002] In the pharmaceutical manufacturing process, drugs need to be ground into powder or capsules to improve the absorption rate and speed by the human body. Grinding mills are commonly used equipment in pharmaceutical plants for batch drug grinding operations.

[0003] Referring to the patent with announcement number CN217663530U, a high-efficiency grinding mill for pharmaceutical production is described. The equipment features an innovative layered structure, with the housing divided into a drying chamber, a grinding chamber, and a collection chamber from top to bottom. The drying chamber combines a circular cross-section with a hollow rotating drum. Hot air is blown out from inside the rotating drum through air holes, and in conjunction with the rotation of the drum, the material is dried efficiently from all directions. The arc-shaped partition plate can be flexibly disassembled, facilitating maintenance and process adjustment.

[0004] However, in the aforementioned pharmaceutical grinding mills, the sieve plate, as the core component for screening qualified powder, often gets clogged due to the accumulation of large particles, which hinders subsequent material screening and severely reduces grinding efficiency. If secondary grinding of large particles is required, operators must manually remove the sieve plate, take out the material, and put it back into the grinding chamber. This cumbersome manual intervention process not only increases labor intensity but also easily introduces the risk of contamination, further restricting production efficiency and the stability of drug quality. Utility Model Content

[0005] In view of the problems of existing pharmaceutical grinding mills, such as the screen plate being easily blocked by large particles and the need for manual intervention in secondary grinding, which leads to low efficiency and increased risk of pollution, this utility model is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a grinding mill for pharmaceutical production, including a drying box, a stirring and drying assembly inside the drying box, a processing box connected to the bottom of the drying box, a switch assembly at the lower end of the processing box, symmetrically arranged grinding rollers rotatably installed inside the processing box, a motor connected to the shaft end of one side of the grinding roller outside the processing box, a sieve plate below the grinding roller, a material return mechanism on one side of the processing box, and a collection box slidably installed on the lower side of the processing box;

[0007] The material return mechanism includes a material conveying shell, in which a material conveying auger is rotatably installed. A transmission cavity is opened inside the lower end of the material conveying shell. A material return port and a material discharge port, which are connected to the material conveying shell, are respectively distributed on one side of the processing box, with the material discharge port located above the transmission cavity.

[0008] As a preferred embodiment, the return mechanism further includes a rotating shaft, which is rotatably mounted below the screen plate inside the processing box. One end of the rotating shaft passes through the conveying shell and is connected to a second motor. A first bevel gear is sleeved on the outer wall of the rotating shaft in the transmission cavity. A second bevel gear meshes with the upper side of the first bevel gear, and the second bevel gear is fixedly connected to the shaft end of the lower end of the conveying auger. A drive assembly for driving the screen plate to move up and down is provided on the outer side of the rotating shaft inside the processing box.

[0009] As a preferred embodiment, the drive assembly includes a protective shell, which is rotatably sleeved on the outside of the rotating shaft. Drive wheels are symmetrically sleeved on the outer wall of the rotating shaft inside the protective shell. A push rod is provided between the two drive wheels. Drive columns are symmetrically provided at the lower end of the push rod. Drive grooves adapted to the drive columns are symmetrically opened on the inner wall of the drive wheels. The upper end of the push rod is fixedly connected to the bottom of the screen plate.

[0010] As a preferred embodiment, the drive wheel has an elliptical structure, the screen plate is inclined towards the side of the conveying shell, and the top surface of the screen plate is on the same plane as the ground inside the discharge port.

[0011] As a preferred embodiment, the processing box is symmetrically provided with guide plates, which are located above the grinding rollers, and the top of the screen plate is symmetrically provided with guide blocks on the side near the material conveying shell.

[0012] As a preferred embodiment, the processing box has support blocks arranged in a rectangular pattern below the sieve plate, and a guide rod is provided below the support block. The guide rod is slidably connected to the support block, and the upper end of the guide rod is fixedly connected to the sieve plate.

[0013] As a preferred embodiment, the switch assembly includes an arc-shaped plate, a storage cavity is provided on the lower side wall of the drying chamber, the arc-shaped plate is slidably installed in the storage cavity, a discharge port is provided at the bottom of the drying chamber penetrating the bottom wall of the drying chamber and communicating with the storage cavity, a connecting rod is rotatably installed at the middle position of one end of the drying chamber, the lower end of the connecting rod is fixedly connected to one end of the arc-shaped plate, a rail groove adapted to the connecting rod is provided at one end of the drying chamber and the rail groove communicates with the storage cavity, and a telescopic rod is rotatably installed at one end of the drying chamber, and the telescopic end of the telescopic rod is hinged to one side of the connecting rod.

[0014] As a preferred embodiment, the arc-shaped plate is concentric with the drying oven, and the width of the arc-shaped plate is greater than the width of the discharge port.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] 1. This utility model uses a motor to drive the push rod, which in turn drives the screen plate to move up and down, thereby screening medicines and preventing large particles from accumulating and clogging the screen plate, thus affecting the screening effect. At the same time, it can guide the screened large particles of medicine into the conveying shell, and use the conveying auger to transport them to the return port, and then guide them back to the grinding roller for secondary grinding, which improves the working efficiency and makes it more practical.

[0017] 2. This utility model uses a switch assembly to operate a telescopic rod, which drives the arc-shaped plate to move, thereby realizing the opening and closing operation of the loading and unloading ports of the drying box.

[0018] 3. This utility model uses support blocks and guide rods to support and guide the sieve plate, making its movement more stable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a partial side sectional view of the present invention;

[0021] Figure 3 This is a front sectional view of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure between the push rod and the rotating shaft of this utility model;

[0023] Figure 5 For the present utility model Figure 1 A magnified structural diagram of A in the middle;

[0024] Figure 6 For the present utility model Figure 3 A magnified structural diagram of B in the diagram.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Drying box; 2. Processing box; 3. Collection box; 4. Grinding roller; 5. Motor 1; 6. Guide plate; 7. Screen plate; 8. Conveying shell; 9. Motor 2; 10. Rotating shaft; 11. Bevel gear 1; 12. Bevel gear 2; 13. Conveying auger; 14. Drive wheel; 15. Top rod; 16. Drive column; 17. Discharge port; 18. Return port; 19. Support block; 20. Guide rod; 21. Protective shell; 22. Storage cavity; 23. Arc plate; 24. Connecting rod; 25. Telescopic rod; 26. Track groove; 27. Guide block. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Reference Figures 1-4 and Figure 6 As shown, a pharmaceutical grinding mill is provided, including a drying chamber 1. The drying chamber 1 is equipped with a stirring and drying assembly. In this example, the stirring and drying assembly consists of a drive motor, a rotating drum, a push plate, a drying fan, and an air duct. It can blow hot air onto the drug while stirring it to dry it. For specific structure and principle, please refer to the corresponding functional section of the above reference document. A processing box 2 is connected to the bottom of the drying chamber 1. A switch assembly is provided at the lower end of the processing box 2. Grinding rollers 4 are symmetrically arranged and rotated inside the processing box 2. A motor 5 is connected to the shaft end of one side of the grinding roller 4 outside the processing box 2. A sieve plate 7 is provided below the grinding roller 4. A material return mechanism is provided on one side of the processing box 2. A collection box 3 is slidably installed on the lower side of the processing box 2.

[0029] The return mechanism includes a conveying shell 8, in which a conveying auger 13 is rotatably installed. A transmission cavity is opened inside the lower end of the conveying shell 8. A return port 18 and a discharge port 17, which are connected to the conveying shell 8, are respectively distributed on one side of the processing box 2, with the discharge port 17 located above the transmission cavity.

[0030] In this example, the return mechanism also includes a rotating shaft 10, which is rotatably mounted below the screen plate 7 inside the processing box 2. One end of the rotating shaft 10 passes through the conveying shell 8 and is connected to a second motor 9. A bevel gear 11 is sleeved on the outer wall of the rotating shaft 10 in the transmission cavity. A bevel gear 12 meshes with the upper side of the bevel gear 11, and the bevel gear 12 is fixedly connected to the shaft end of the lower end of the conveying auger 13. A drive assembly for driving the screen plate 7 to swing up and down is provided on the outside of the rotating shaft 10 inside the processing box 2. By driving the screen plate 7 to swing and the conveying auger 13 to operate simultaneously through the same second motor 9, power integration is achieved, simplifying the structure and reducing energy consumption.

[0031] In this example, the drive assembly includes a protective shell 21, which is rotatably sleeved on the outside of the rotating shaft 10. Drive wheels 14 are symmetrically sleeved on the outer wall of the rotating shaft 10 inside the protective shell 21. A push rod 15 is provided between the two drive wheels 14. Drive columns 16 are symmetrically provided at the lower end of the push rod 15. Drive grooves adapted to the drive columns 16 are symmetrically opened on the inner wall of the drive wheels 14. The upper end of the push rod 15 is fixedly connected to the bottom of the screen plate 7. Through the cooperation of the drive wheels 14 and the drive columns 16, the rotational motion of the rotating shaft 10 is converted into the up-and-down reciprocating motion of the screen plate 7. The structure is compact and the transmission is stable.

[0032] In this example, the drive wheel 14 has an elliptical structure, the screen plate 7 is inclined toward the side of the conveying shell 8, and the top surface of the screen plate 7 is on the same plane as the ground inside the discharge port 17; the elliptical drive wheel 14 can provide a more uniform sway amplitude, and the inclined screen plate 7, together with the discharge port 17, facilitates the flow of materials toward the conveying shell 8, thereby improving screening and guiding efficiency.

[0033] In this example, guide plates 6 are symmetrically arranged inside the processing box 2, and the guide plates 6 are located above the grinding rollers 4. Guide blocks 27 are symmetrically arranged on the top of the screen plate 7 near the side of the conveying shell 8. The guide plates 6 guide the material to fall evenly into the gap of the grinding rollers 4, and the guide blocks 27 guide the large particles on the screen plate 7 to flow precisely to the conveying shell 8, reducing material retention and improving process continuity.

[0034] In this example, support blocks 19 are arranged in a rectangular pattern below the sieve plate 7 inside the processing box 2. A guide rod 20 is provided below the support block 19, and the guide rod 20 is slidably connected to the support block 19. The upper end of the guide rod 20 is fixedly connected to the sieve plate 7. The support block 19 and the guide rod 20 form a stable support structure, which limits the lateral displacement of the sieve plate 7 when it shakes, and ensures that the screening process is stable and reliable.

[0035] Reference Figures 1-2 and Figure 5 As shown in this example, the switch assembly includes an arc-shaped plate 23. A storage cavity 22 is provided on the lower side wall of the drying chamber 1. The arc-shaped plate 23 is slidably installed in the storage cavity 22. A discharge port is provided at the bottom of the drying chamber 1, penetrating the bottom wall of the drying chamber 1 and communicating with the storage cavity 22. A connecting rod 24 is rotatably installed at the middle position of one end of the drying chamber 1. The lower end of the connecting rod 24 is fixedly connected to one end of the arc-shaped plate 23. A rail groove 26 adapted to the connecting rod 24 is provided at one end of the drying chamber 1, and the rail groove 26 communicates with the storage cavity 22. A telescopic rod 25 is rotatably installed at one end of the drying chamber 1, and the telescopic end of the telescopic rod 25 is hinged to one side of the connecting rod 24. The arc-shaped plate 23 is driven to slide along the rail groove 26 by the telescopic rod 25 to realize the switching control of the discharge port. The structure is simple and easy to operate, and the material discharge rhythm can be accurately controlled.

[0036] In this example, the arc plate 23 is concentric with the drying chamber 1, and the width of the arc plate 23 is greater than the width of the discharge port. The concentric design ensures that the arc plate 23 fits tightly against the inner wall of the storage cavity 22 when it slides, preventing material leakage. The width being greater than the discharge port can completely cover the opening, improving the sealing reliability.

[0037] During use, the material is first dried in the drying chamber 1 by the mixing and drying components in conjunction with hot air. After drying, the telescopic rod 25 drives the connecting rod 24 to move the arc plate 23 to open the discharge port. The material falls through the guide plate 6 into the processing chamber 2 between the two grinding rollers 4. The grinding rollers 4 are ground by the motor 5. After grinding, the material falls onto the inclined screen plate 7. The motor 9 drives the rotating shaft 10 to rotate the elliptical drive wheel 14. Through the drive groove and drive column 16, the top rod 15 drives the screen plate 7 to shake and screen. The fine powder falls into the collection box 3. Large particles are guided by the guide block 27 to the discharge port 17 and then enter the conveying shell 8. At the same time, the operation of the second motor 9 is driven by the first bevel gear 11 and the second bevel gear 12, thereby driving the conveying auger 13 to rotate. The conveying auger 13 sends the large particles of medicine back to the grinding roller 4 for secondary grinding through the return port 18. During the process, the support block 19 and the guide rod 20 support the screen plate 7 to ensure stability. The concentric design of the arc plate 23 ensures the sealing of the discharge port. The whole system achieves efficient grinding through power integration and automation structure.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model 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 solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A grinding mill for pharmaceutical production, comprising a drying chamber (1), characterized in that: The drying box (1) is equipped with a stirring and drying component. The bottom of the drying box (1) is connected to a processing box (2). The lower end of the processing box (2) is equipped with a switch component. The processing box (2) is rotatably installed with symmetrically arranged grinding rollers (4). One side of the grinding roller (4) is connected to a motor (5) outside the processing box (2). The grinding roller (4) is equipped with a sieve plate (7) below it. The processing box (2) is equipped with a material return mechanism on one side. The processing box (2) is slidably installed with a collection box (3) on one side of its lower part. The return mechanism includes a material conveying shell (8), in which a material conveying auger (13) is rotatably installed. A transmission cavity is opened inside the lower end of the material conveying shell (8). The processing box (2) has a return port (18) and a discharge port (17) that are connected to the material conveying shell (8) respectively, and the discharge port (17) is located above the transmission cavity.

2. The grinding mill for pharmaceutical production according to claim 1, characterized in that: The return mechanism also includes a rotating shaft (10), which is rotatably installed below the screen plate (7) inside the processing box (2). One end of the rotating shaft (10) passes through the conveying shell (8) and is connected to a motor (9). A bevel gear (11) is sleeved on the outer wall of the rotating shaft (10) in the transmission cavity. A bevel gear (12) meshes on the upper side of the bevel gear (11), and the bevel gear (12) is fixedly connected to the shaft end of the lower end of the conveying auger (13). A drive assembly for driving the screen plate (7) to swing up and down is provided on the outer side of the rotating shaft (10) inside the processing box (2).

3. A grinding mill for pharmaceutical production according to claim 2, characterized in that: The drive assembly includes a protective shell (21), which is rotatably sleeved on the outside of the rotating shaft (10). The outer wall of the rotating shaft (10) is symmetrically sleeved with drive wheels (14) inside the protective shell (21). A top rod (15) is provided between the two drive wheels (14). A drive column (16) is symmetrically provided at the lower end of the top rod (15). The drive wheel (14) is symmetrically provided with drive grooves that are adapted to the drive column (16) on its inner wall. The upper end of the top rod (15) is fixedly connected to the bottom of the sieve plate (7).

4. A grinding mill for pharmaceutical production according to claim 3, characterized in that: The drive wheel (14) has an elliptical structure, the screen plate (7) is inclined to one side of the conveying shell (8), and the top surface of the screen plate (7) is on the same plane as the ground inside the discharge port (17).

5. A grinding mill for pharmaceutical production according to claim 4, characterized in that: The processing box (2) is symmetrically provided with guide plates (6), and the guide plates (6) are located above the grinding roller (4). The top of the sieve plate (7) is symmetrically provided with guide blocks (27) on the side near the material conveying shell (8).

6. A grinding mill for pharmaceutical production according to claim 4, characterized in that: Inside the processing box (2), there are support blocks (19) arranged in a rectangular pattern below the sieve plate (7). Below the support blocks (19) are guide rods (20) of the support blocks (19), and the guide rods (20) are slidably connected to the support blocks (19). The upper end of the guide rods (20) is fixedly connected to the sieve plate (7).

7. A grinding mill for pharmaceutical production according to claim 2, characterized in that: The switch assembly includes an arc plate (23). The lower side wall of the drying box (1) is provided with a storage cavity (22). The arc plate (23) is slidably installed in the storage cavity (22). The bottom of the drying box (1) is provided with a discharge port that penetrates the bottom wall of the drying box (1) and the discharge port is connected to the storage cavity (22). A connecting rod (24) is rotatably installed at the middle position of one end of the drying box (1). The lower end of the connecting rod (24) is fixedly connected to one end of the arc plate (23). One end of the drying box (1) is provided with a rail groove (26) that is adapted to the connecting rod (24) and the rail groove (26) is connected to the storage cavity (22). A telescopic rod (25) is rotatably installed at one end of the drying box (1) and the telescopic end of the telescopic rod (25) is hinged to one side of the connecting rod (24).

8. A grinding mill for pharmaceutical production according to claim 7, characterized in that: The arc plate (23) is concentric with the drying box (1), and the width of the arc plate (23) is greater than the width of the discharge port.

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