Oscillating granulator

Abstract

The utility model relates to the technical field of pharmaceutical and chemical equipment, in particular to an oscillating granulator, firstly, according to the oscillating granulator, a driving motor drives a rolling cage to rotate to realize granulation through worm and gear transmission, the output torque can be increased through the worm and gear transmission, and the problem that the rolling cage is stuck or the driving motor is overloaded is effectively solved; the driving motor and the rolling cage can be arranged in a criss-cross manner, so that the axial size of the whole machine is reduced; and secondly, the rolling cage comprises a plurality of rolling strips which are evenly distributed in the circumferential direction at intervals, the sections of the rolling strips are fan-shaped, the circle center parts of the rolling strips are arranged outwards, the problem that materials adhere to the surfaces of the rolling strips and are accumulated in the rolling cage is effectively solved, and the risk that the rolling cage is stuck is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical and chemical equipment technology, and in particular to a gyratory pellet mill. Background Technology

[0002] A gyratory pellet mill is a type of equipment commonly used in the pharmaceutical, chemical, and food industries to manufacture granular products such as tablets and granular fertilizers. Its working principle involves the gyratory pellet mill using a continuously rotating rocker arm to cause the internal material to oscillate, contacting a screen on a fixed shaft to form pellets. This screening and granulation process subjectes the raw material to continuous force, ultimately forming the desired granular product.

[0003] The applicant discovered that existing technologies, such as the oscillating pellet mill disclosed in patent number CN118718872A, have the following problems:

[0004] The drive motor is directly connected to one end of the central shaft via a coupling, which results in an excessively long axial dimension of the oscillating pellet mill. Furthermore, a high-power motor is required when producing wet or highly viscous materials. This design also leads to problems such as high energy consumption and a large design size for the oscillating pellet mill.

[0005] The swing component is designed as a plate, and its surface is mostly flat. Materials can easily adhere to the swing component, leading to problems such as overload of the drive motor or even jamming of the swing component. Utility Model Content

[0006] To achieve the above objectives, this utility model provides a gyratory pellet mill, comprising:

[0007] Mobile base;

[0008] A chassis is fixedly installed on the mobile base. A drive motor and a drive gear shaft are installed inside the chassis. The output end of the drive motor is connected to a worm gear, and one end of the drive gear shaft is connected to a worm wheel. The worm gear and the worm wheel mesh and transmit power.

[0009] A pelleting bin is located on one side of the machine housing. A hopper is connected to the upper end of the pelleting bin, and a discharge port is provided at the lower end. A screen is provided at the upper end of the discharge port. The other end of the drive gear shaft extends into the pelleting bin and drives a roller cage. The roller cage includes several rollers that are evenly distributed circumferentially. The cross-section of the rollers is fan-shaped and their center faces outward.

[0010] In some possible embodiments, the worm gear is connected to a worm shaft, one end of which is mounted with a balance wheel. A rack is eccentrically hinged to the balance wheel, one end of which is attached to the drive gear shaft. The worm gear drives the balance wheel to rotate and, through the rack, drives the drive gear shaft to oscillate back and forth.

[0011] In some possible embodiments, a mounting plate is provided at the bottom of the chassis, one end of the mounting plate is hinged to the chassis, and the other end is connected to a shock absorber. The drive motor is fixed on the mounting plate, and a pulley is provided at one end of the worm gear.

[0012] In some possible embodiments, the roller cage includes two mirror-arranged side plates, one of which is fixedly connected to the drive gear shaft, and the two ends of the roller are respectively fixedly connected to the two side plates.

[0013] In some possible embodiments, the side plate has a regular polygonal cross-section, and the edges of the side plate are ground flat to form a mounting surface for welding and fixing the roller.

[0014] In some possible embodiments, the edges at the central corner of the roller are rounded.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: First, the oscillating pellet mill of this utility model uses a drive motor to drive the roller to rotate through a worm gear transmission to achieve pelletizing. The worm gear transmission can not only increase the output torque and effectively avoid the problems of roller jamming or drive motor overload, but also the drive motor can be arranged crisscrossingly with the roller, reducing the axial dimension of the whole machine. Second, the roller includes several rollers that are evenly distributed circumferentially. The cross-section of the roller is fan-shaped and its center is set outward, which effectively reduces the problem of material adhering to the surface of the roller and accumulating in the roller, reducing the risk of roller jamming. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 Schematic diagram of the internal structure of the oscillating pellet mill provided in the embodiment of this utility model Figure 1 ;

[0018] Figure 2 A three-dimensional structural diagram of the oscillating pellet mill provided in an embodiment of this utility model;

[0019] Figure 3 A three-dimensional structural and cross-sectional schematic diagram of the roller cage provided in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram illustrating the operation of the balance wheel driving the drive gear shaft to swing, as provided in an embodiment of this utility model.

[0021] Figure label:

[0022] Mobile base 10, mounting plate 11, shock absorber 12;

[0023] 20. Chassis; 21. Drive motor; 22. Drive gear shaft; 23. Worm gear; 24. Worm wheel; 25. Worm shaft; 26. Balance wheel; 27. Rack.

[0024] 30. Granulation bin, 31. Hopper, 32. Discharge port, 33. Screen, 34. Roller, 35. Side plate, 36. Roller bar. Detailed Implementation

[0025] 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 scope of protection of the present utility model. Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0026] Reference Figures 1 to 3The illustrated oscillating pellet mill includes a movable base 10, a casing 20, and a pelletizing chamber 30. Both the casing 20 and the pelletizing chamber 30 are fixedly mounted on the movable base 10, with the pelletizing chamber 30 located on one side of the casing 20. A drive motor 21 and a drive gear shaft 22 are housed within the casing 20. The output end of the drive motor 21 is directly or indirectly connected to a worm gear 23, and one end of the drive gear shaft 22 is also directly or indirectly connected to a worm wheel 24. The worm gear 23 meshes with the worm wheel 24 for power transmission. The drive motor 21 drives the drive gear to rotate through the worm gear 24 and worm 23 structure. A hopper 31 is connected to the upper end of the granulation chamber 30. The material to be granulated is fed into the granulation chamber 30 from the hopper 31. A discharge port 32 is provided at the lower end of the granulation chamber 30, from which the granulated particles are discharged. One end of the drive gear shaft 22 extends horizontally into the granulation chamber 30, and a roller 34 is connected to this extended end. The granulation chamber 30 is located between the lower end of the roller 34 and the discharge port. A screen 33 is installed at the upper end of 32. The drive gear shaft 22 drives the roller 34 to rotate, squeezing the material through the mesh of the screen 33 to form granules. The roller 34 includes several circumferentially spaced rollers 36. The material can fall from the gap between the rollers 36 and the inner wall of the granulation chamber 30 or between two adjacent rollers 36 onto the upper end of the screen 33. The cross-section of the rollers 36 is fan-shaped with the center facing outwards, that is, the circular part of all rollers 36 Located on the outer ring of the roller 34 to cooperate with the screen 33 to compress and granulate the material, its fan-shaped part is located on the inner ring of the roller 34. When the material falls from top to bottom into the roller 34 and is supported by the fan shape of the roller 36, the arc shape of the fan-shaped part can reduce the static friction force of the material on it. Therefore, when the roller 36 swings with the drive gear shaft 22, it is easy to throw out the material adhering to its fan-shaped surface, avoiding the problem of excessive material adhesion causing motor overload or even roller 34 jamming.

[0027] It should be noted that the oscillating pellet mill uses the forward and reverse oscillation of the roller 34 in conjunction with the screen 33 at its lower end to make the material into granules. Therefore, it is understandable that in some cases, the drive motor 21 adopts a conventional structure and model that can achieve forward and reverse rotation.

[0028] In some possible embodiments, refer to Figure 1 and Figure 4As shown, the drive gear shaft 22 and the worm gear 24 are indirectly connected. Specifically, the worm gear 24 is fixedly installed at one end of the worm shaft 25, and a balance wheel 26 is fixedly installed at the other end of the worm shaft 25. A rack 27 is eccentrically hinged to the balance wheel 26. The rack 27 is inclined and overlaps the drive gear shaft 22. When the balance wheel 26 rotates, it drives the rack 27 to move. The movement of the rack 27 relative to the drive gear shaft 22 can be divided into two parts: first, the rack 27 moves back and forth along its axial direction to drive the drive gear shaft 22 to swing; second, the rack 27 swings back and forth around the contact point on the outer periphery of its contact with the drive gear shaft 22. One end of rack 27 is movably hinged to balance wheel 26, and the other end is free. Therefore, the movement is manifested as several adjacent teeth on rack 27 meshing with drive gear shaft 22 in sequence or reciprocally. However, it can be clearly understood that there is no load on this movement. Therefore, the structure can smoothly and stably realize the reciprocating swing of drive gear shaft 22. It should be understood that rack 27 is always meshed with drive gear shaft 22 during operation. Therefore, rack 27 should always be tilted and overlapped on drive gear shaft 22. That is, rack 27 overlaps on drive gear shaft 22 by its own weight, ensuring that it is always in contact with drive gear shaft 22. In this embodiment, the drive motor 21 only needs to rotate forward or reverse to drive the drive gear shaft 22 to swing, thereby improving the efficiency of granulation production. Moreover, the movement between the rack 27 and the drive gear shaft 22 is a meshing transmission, and the rack 27 swings back and forth around the contact point on the outer periphery of the rack 27 and the drive gear shaft 22. There is no slippage between the two, so the wear and heat generation between the rack 27 and the drive gear shaft 22 can be reduced, thereby improving the service life of the equipment.

[0029] In some possible embodiments, refer to Figure 1 As shown, a mounting plate 11 is provided at the bottom of the chassis 20. One end of the mounting plate 11 is hinged to the chassis 20, and the other end of the mounting plate 11 is hinged to the bottom of the chassis 20 via a shock absorber 12. That is, one end of the shock absorber 12 is hinged to the bottom of the chassis 20, and the other end is fixedly installed on the mounting plate 11. The drive motor 21 is fixedly mounted on the mounting plate 11. When the drive motor 21 starts, the vibration generated by it is absorbed by the shock absorber 12, thereby reducing the vibration of the equipment and improving the stability of equipment production. In this embodiment, the drive motor 21 is installed at the bottom of the chassis 20. The output end of the drive motor 21 can drive the worm gear 23 to rotate through a transmission belt. Specifically, a pulley is provided at one end of the worm gear 23, and the transmission belt is sleeved on the pulley and the output end of the drive motor 21. Therefore, when the drive motor 21 is turned on, it can drive the worm gear 23 to rotate through the transmission belt.

[0030] In some possible embodiments, refer to Figure 3As shown, the roller 34 includes two mirror-arranged side plates 35. One side plate 35 is driven to one end of the drive gear shaft 22, and the other side plate 35 is mounted on the side wall of the granulation chamber 30 via bearings. The two side plates 35 are fixedly connected by rollers 36, that is, the two ends of the rollers 36 are welded and fixed to the two side plates 35 respectively. Furthermore, the cross-section of the side plate 35 is a regular polygon, and the edges of the side plate 35 are ground flat to form an installation plane. The two ends of the rollers 36 are also provided with overlapping planes for welding. After welding, the center part of the rollers 36 protrudes from the surface of the side plate 35 to ensure that the rollers 36 and the screen 33 cooperate to achieve granulation. Furthermore, the edges at the central corners of the rollers 36 are rounded to avoid burrs from being generated at this point and damaging the screen 33 or burrs falling into the granules.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A vibrating pellet mill, characterized in that, include: Mobile base (10); A chassis (20) is fixedly installed on the mobile base (10). A drive motor (21) and a drive gear shaft (22) are provided inside the chassis (20). The output end of the drive motor (21) is connected to a worm (23), and one end of the drive gear shaft (22) is connected to a worm wheel (24). The worm (23) and the worm wheel (24) mesh and transmit power. A pelletizing bin (30) is located on one side of the casing (20). The upper end of the pelletizing bin (30) is connected to a hopper (31), and the lower end is provided with a discharge port (32). A screen (33) is provided at the upper end of the discharge port (32). The other end of the drive gear shaft (22) extends into the pelletizing bin (30) and drives a roller cage (34). The roller cage (34) includes several rollers (36) evenly distributed along the circumference. The cross section of the rollers (36) is fan-shaped and its center faces outward.

2. The oscillating pellet mill according to claim 1, characterized in that, The worm gear (24) is connected to a worm shaft (25). A balance wheel (26) is installed at one end of the worm shaft (25). A rack (27) is eccentrically hinged to the balance wheel (26). One end of the rack (27) is attached to the drive gear shaft (22). The worm gear (24) drives the balance wheel (26) to rotate and drives the drive gear shaft (22) to swing back and forth through the rack (27).

3. A gyratory pellet mill according to claim 1, characterized in that, The bottom of the chassis (20) is provided with a mounting plate (11), one end of the mounting plate (11) is hinged to the chassis (20), and the other end is connected to a shock absorber (12). The drive motor (21) is fixed on the mounting plate (11).

4. A gyratory pellet mill according to claim 1, characterized in that, The roller cage (34) includes two side plates (35) arranged in a mirror image, one of which is fixedly connected to the drive gear shaft (22), and the two ends of the roller (36) are fixedly connected to the two side plates (35) respectively.

5. A gyratory pellet mill according to claim 4, characterized in that, The side plate (35) has a regular polygonal cross section, and the edges of the side plate (35) are ground flat to form an mounting surface for welding and fixing the roller (36).

6. A gyratory pellet mill according to claim 1, characterized in that, The edges of the roller (36) at the central corner are rounded.

Images