Oscillating granulator for medicine production
The oscillating granulator, with its dual-drum counter-oscillating and staggered blade design, solves the problem of uneven drug movement within a single drum, achieving efficient drug dispersion and granulation while protecting the activity of heat-sensitive materials.
Patent Information
- Application Number
- CN202511456744.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-13
- Publication Date
- 2025-11-11
AI Technical Summary
The single-drum design of existing oscillating granulators results in uneven movement of the drug within the drum. The material near the drum wall experiences greater force, while the material in the center of the drum moves less, leading to localized agglomeration and affecting the dispersing effect.
The device employs a dual-roller design, with the inner and outer rollers oscillating in opposite directions to create a bidirectional shearing field. Combined with the protrusions on the surface of the inner roller and the staggered blades, it breaks down drug agglomerates and improves dispersion efficiency through multi-directional extrusion, stretching, cutting, and airflow shearing.
It effectively breaks down drug agglomerates, improves the overall dispersion efficiency and subsequent granulation efficiency of the drug, protects the activity of heat-sensitive materials, and ensures drug quality.
Smart Images
Figure CN120919902A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of pellet mill technology, and more specifically, to a swing-type pellet mill for drug production. Background Technology
[0002] A gyratory granulator is a device that uses the gyratory action of a rotating drum to compress solid materials into granules using a screen. It is widely used in the pharmaceutical, food, and chemical industries. It is mainly used to mix powdered raw materials with binders and then mechanically extrude and cut them into uniform granules. Its core feature is the "gyratory" drum design, which extrudes wet materials into strips through reciprocating oscillation, and then cuts them into granules through a screen. Due to its simple structure, flexible operation, and ease of cleaning, this equipment has become one of the classic wet granulation devices in the pharmaceutical industry.
[0003] In existing technologies, commercially available oscillating granulators typically use only a single roller assembly to disperse and mix drugs. However, the single-roller structure results in relatively simple drug movement within the roller, relying primarily on the roller's rotation. Within a single roller, material flow exhibits some unevenness; materials near the roller wall and scraper experience greater forces, while materials in the center or corners of the roller experience less tumbling and shearing. This leads to some materials failing to be fully dispersed, resulting in localized agglomeration and affecting the overall dispersion effect. Therefore, inventing an oscillating granulator for drug production to address these issues has become a pressing problem for those skilled in the art. Summary of the Invention
[0004] To overcome the above shortcomings, this invention provides a gyratory granulator for drug production, which aims to solve the problem that the single-drum gyratory granulator commonly found on the market has a poor drug dispersion effect.
[0005] This invention is implemented as follows: This invention provides a swing-type granulator for drug production, including a control box and a feeding frame disposed on the side wall of the control box. The control box is equipped with a motor and a reducer. A drive groove is provided inside the control box near the reducer. A rotating plate and a connecting rod are installed on the inner wall of the drive groove. The side wall of the feeding frame is fixedly connected to the side wall of the control box. A feeding pipe is installed on the lower inner wall of the feeding frame. A screen is installed on the inner wall of the feeding frame. A roller assembly is installed inside the feeding frame. The roller assembly includes a side plate, a pressure rod, and an internal toothed ring. An inner roller is installed on the inner wall of the roller assembly, and the surface of the inner roller is provided with several protrusions.
[0006] Preferably, the output end of the motor and the input end of the reducer are fixedly connected, and a drive shaft and a limiting shaft are symmetrically fixedly connected to both sides of the rotating plate, respectively. The outer wall of the drive shaft and the inner wall of the drive groove are rotatably connected, the output end of the reducer and one end of the drive shaft are fixedly connected, and the inner wall of one end of the connecting rod and the outer wall of the limiting shaft are rotatably connected.
[0007] Preferably, the screen is installed on the inner wall of the feeding frame by insertion, the outer wall of the side plate is rotatably connected to the inner wall of the feeding frame, a plurality of pressure rods are fixedly connected between the two side plates, a fixing rod is fixedly connected to the side wall of one of the side plates, and an eccentric shaft is fixedly connected to the outer wall of one side of the fixing rod and rotatably connected to the inner wall of one end of the connecting rod.
[0008] Preferably, one end of the other side plate is fixedly connected to an internal gear ring that meshes with the driving gear, one end of the inner roller is fixedly connected to a rotating shaft that rotatably connects to the inner wall of the side plate, the outer wall of the rotating shaft is fixedly connected to a driven gear that meshes with the driving gear, and the protrusion is hollow.
[0009] By adopting the above technical solution, the inner roller set inside the roller assembly swings in opposite directions, forming a bidirectional shear field between them. The drug located between the outer wall of the inner roller and the pressure bar is subjected to multi-directional compression and stretching, thereby enhancing the breaking of drug agglomerates and improving the efficiency of breaking drug agglomerates. At the same time, several protrusions set on the surface of the inner roller contact and compress the drug with their edges during the swinging process, thereby breaking the agglomerate state of the surrounding drug and dispersing the clumps between drugs, thus improving the overall dispersion efficiency of the drug and further improving the efficiency of subsequent granulation. In addition, the paraffin filling inside the protrusions maintains the temperature of the protrusions and the surrounding drug while dispersing the drug, avoiding excessive heat in the drug that would reduce the activity of the heat-sensitive materials, thereby ensuring the overall quality of the drug.
[0010] Preferably, the surface of the inner roller is provided with a plurality of telescopic grooves, and six telescopic grooves are arranged symmetrically as a group. A blade is slidably connected to the inner wall of the telescopic groove, and a positioning block is fixedly connected to one end of the blade near the inside of the inner roller.
[0011] Preferably, a fixed shaft extending into the inner roller is fixedly connected to one side of the side plate. A plurality of equally spaced extrusion blocks are fixedly connected to the outer wall of the fixed shaft. Each extrusion block is made of three protruding arc-shaped blocks. A groove is provided on the side wall of the extrusion block. A rotating ring is rotatably connected to the inner wall of the groove. Six symmetrically arranged springs are installed on the side wall of the rotating ring. The two end side walls of each spring are fixedly connected to the side walls of the rotating ring and the positioning block, respectively.
[0012] Preferably, symmetrical mounting grooves are provided on both sides of the telescopic groove, an airbag is installed on the inner wall of the mounting groove, an air passage is provided inside the blade, and the air inlet of the airbag is fixedly connected to the outer wall of the blade near the air passage.
[0013] Preferably, the blade has a cavity communicating with an air passage inside, and the inner walls of the blade near the cavity have penetrating air blowing holes.
[0014] By adopting the above technical solution, several blades with staggered protrusions on the roller surface apply a linear cutting force to the drug through their sharp cutting edges during the inner roller's oscillation. This can directly cut the agglomerates of highly viscous drugs, ensuring the drug's dispersing effect. In addition, the telescopic structure on one side of the blades causes adjacent blades to cross-extend during the inner roller's oscillation, forming an intermittent high-shear zone. This cross-force can further improve the efficiency of drug dispersing, thereby further improving the efficiency of subsequent drug granulation.
[0015] The beneficial effects of this invention are: The inner roller inside the roller assembly achieves bidirectional rolling mixing by swinging in opposite directions. The drug located between the outer wall of the inner roller and the pressure bar is subjected to multi-directional compression and stretching, thereby enhancing the breaking effect on drug agglomerates and improving the efficiency of breaking drug agglomerates. At the same time, several protrusions on the surface of the inner roller contact and compress the drug during the swinging process, thereby breaking the agglomerate state of the surrounding drug and dispersing the clumps between drugs, thus improving the overall dispersion efficiency of the drug and further improving the efficiency of subsequent granulation. In addition, the paraffin filling inside the protrusions maintains the temperature of the protrusions and the surrounding drug while dispersing the drug, avoiding excessive heat in the drug that would reduce the activity of the heat-sensitive materials, thereby ensuring the overall quality of the drug. Several blades with staggered protrusions on the roller surface apply a linear cutting force to the drug through their sharp edges during the inner roller's oscillation. This can directly cut off agglomerates of highly viscous drugs, ensuring the drug's dispersing effect. Additionally, the telescopic structure on one side of the blades causes adjacent blades to cross-extend during the inner roller's oscillation, forming an intermittent high-shear zone. This cross-force can further improve the efficiency of drug dispersing, thereby further improving the efficiency of subsequent drug granulation. The blade has several air vents on both sides, which work in conjunction with the airbags installed on both sides. As the blade extends out of the inner roller, the airbags are compressed, and the air inside the airbags is ejected from both sides of the blade through the air vents. The airflow and the blade cutting together form a compound shear force, which penetrates the drug agglomerates and further disperses the drug, improving the dispersion efficiency. At the same time, the airflow can carry away the heat generated by friction during the cutting process, reduce the heat of the surrounding drug, protect the activity of the heat-sensitive components in the drug, and ensure that the quality of the drug is not affected. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of a swing-type granulator for drug production provided by an embodiment of the present invention; Figure 2 This is a front sectional view of a pharmaceutical production swing-type granulator structure provided by an embodiment of the present invention; Figure 3 This is a side sectional view of a pharmaceutical production swing-type granulator structure provided by an embodiment of the present invention; Figure 4 This is a half-sectional view of a pharmaceutical production swing-type granulator provided by an embodiment of the present invention; Figure 5 This invention provides a pharmaceutical production swing-type granulator. Figure 4 Enlarged view of the structure of region A in the middle; Figure 6 This invention provides a pharmaceutical production swing-type granulator. Figure 4 Enlarged view of the structure of region B in the middle; Figure 7 This is a schematic diagram of the roller assembly structure in a gyratory granulator for drug production provided by an embodiment of the present invention; Figure 8 This is a cross-sectional view of the roller assembly in a gyratory granulator for drug production provided by an embodiment of the present invention; Figure 9 This is an exploded schematic diagram of the roller assembly and inner roller of a gyratory granulator for drug production provided by an embodiment of the present invention; Figure 10 This is a schematic diagram of the inner drum structure in a gyratory granulator for drug production provided by an embodiment of the present invention; Figure 11This is a cross-sectional view of the inner drum structure in a gyratory granulator for drug production provided by an embodiment of the present invention; Figure 12 This invention provides a pharmaceutical production swing-type granulator. Figure 11 Enlarged view of the structure of region C in the middle; Figure 13 This is a sectional view of the inner drum side structure of a gyratory granulator for drug production provided by an embodiment of the present invention; Figure 14 This invention provides a pharmaceutical production swing-type granulator. Figure 13 Enlarged view of the structure of region D in the middle; Figure 15 This is a cross-sectional view of the overall structure of the roller assembly and inner roller of a gyratory granulator for drug production provided by an embodiment of the present invention.
[0018] In the diagram: 1. Control box; 11. Motor; 12. Reducer; 13. Drive slot; 14. Rotating plate; 141. Drive shaft; 142. Limiting shaft; 15. Connecting rod; 2. Feeding frame; 21. Feeding pipe; 22. Screen; 23. Drive gear; 3. Roller assembly; 31. Side plate; 311. Fixed rod; 312. Eccentric shaft; 32. Pressure rod; 33. Internal gear ring; 4. Inner roller; 41. Protrusion; 42. Rotating shaft; 421. Driven gear; 43. Telescopic slot; 431. Mounting slot; 44. Blade; 441. Air passage; 442. Cavity; 443. Air blowing hole; 444. Positioning block; 45. Airbag; 5. Fixed shaft; 51. Extrusion block; 511. Groove; 52. Rotating ring; 521. Spring. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.
[0020] Example, refer to Figures 1-15 A drug production swing granulator includes a control box 1 and a feeding frame 2 set on the side wall of the control box 1. The control box 1 is equipped with a motor 11 and a reducer 12. The control box 1 is provided with a drive groove 13 near the reducer 12. The inner wall of the drive groove 13 is equipped with a rotating plate 14 and a connecting rod 15. The side wall of the feeding frame 2 is fixedly connected to the side wall of the control box 1. A feeding pipe 21 is installed on the lower inner wall of the feeding frame 2. A screen 22 is installed on the inner wall of the feeding frame 2. A roller assembly 3 is installed inside the feeding frame 2. The roller assembly 3 includes a side plate 31, a pressure rod 32, and an internal toothed ring 33. An inner roller 4 is installed on the inner wall of the roller assembly 3, and the surface of the inner roller 4 is provided with a number of protrusions 41.
[0021] Furthermore; the output end of motor 11 and the input end of reducer 12 are fixedly connected; drive shaft 141 and limit shaft 142 are symmetrically fixedly connected to both sides of rotating plate 14; the outer wall of drive shaft 141 and the inner wall of drive groove 13 are rotatably connected; the output end of reducer 12 and one end of drive shaft 141 are fixedly connected; the inner wall of one end of connecting rod 15 and the outer wall of limit shaft 142 are rotatably connected; screen 22 is installed on the inner wall of feeding frame 2 by insertion; the outer wall of side plate 31 and the inner wall of feeding frame 2 are rotatably connected; and the two side plates 31 are connected together. Multiple pressure rods 32 are fixedly connected. A fixing rod 311 is fixedly connected to the side wall of one side plate 31. An eccentric shaft 312 that is rotatably connected to the inner wall of one end of the connecting rod 15 is fixedly connected to the outer wall of one side of the fixing rod 311. An internal gear ring 33 that meshes with the driving gear 23 is fixedly connected to one end of the other side plate 31. A rotating shaft 42 that rotatably connects to the inner wall of the side plate 31 is fixedly connected to one end of the inner roller 4. A driven gear 421 that meshes with the driving gear 23 is fixedly connected to the outer wall of the rotating shaft 42. The protrusion 41 is hollow. It should be noted that during operation, the starting motor 11 drives the drive shaft 141 on one side to rotate the rotating plate 14. The limiting shaft 142 on one side of the rotating plate 14 rotates at the same time. The connecting rod 15 on the outside of the limiting shaft 142, together with the eccentric shaft 312, drives the side plate 31 on one side to rotate the entire roller assembly 3, thereby realizing the reciprocating swing of the entire roller assembly 3. The medicine is put into the feeding frame 2. At this time, the medicine in the feeding frame 2 is broken apart by the rotation between multiple pressure rods 32. At the same time, the material on the inner wall of the feeding frame 2 is crushed and broken apart by the pressure rods 32. The broken material falls above the screen 22 by gravity. At this time, the pressure rods 32 around the rotating roller assembly 3 will roll back and forth on the medicine on the screen 22 during the swing, so that the medicine is squeezed down through the holes of the screen 22 and separated into granules. Then the granular medicine is collected through the feeding pipe 21. During the reciprocating oscillation of the roller assembly 3 to disperse the medicine, the internal gear ring 33 on one side of the side plate 31 rotates simultaneously with the side plate 31. During this rotation, it meshes with the driving gear 23 on one side and rotates in the same direction. Simultaneously, the driving gear 23 meshes with the driven gear 421 on one side and rotates. Consequently, the shaft 42 on the inner wall of the driven gear 421 rotates, thereby driving the inner roller 4 to rotate. This achieves the oscillation of the roller assembly 3 and the inner roller 4 in opposite directions. During the oscillation of the two in opposite directions, a unique bidirectional shear field is formed in the area between them. In this shear field, the drug located between the outer wall of the inner roller 4 and the pressure bar 32 is subjected to multi-directional compression and stretching. On the one hand, the pressure bar 32 on the roller assembly 3 applies pressure to the drug, and on the other hand, the outer wall of the inner roller 4 generates reverse pressure on the drug. This multi-directional compression can effectively break the structure of drug agglomerates, increase the distance between drug particles, and thus improve the drug dispersion effect. At the same time, the drug is also subjected to stretching. During the relative movement of the roller assembly 3 and the inner roller 4, the drug is stretched and deformed, further destroying the internal structure of the drug agglomerates. Through the synergistic effect of multi-directional compression and stretching, the efficiency of breaking drug agglomerates is greatly improved. Meanwhile, the protrusions 41 on the outer side of the inner roller 4 continuously throw and grab the material during the swinging process. When the protrusions 41 approach the drug, they will throw some of the drug out, making the drug more evenly distributed in the processing area. At the same time, when the protrusions 41 move away, they will form a certain negative pressure area to grab the surrounding drug. During this process, the edge of the protrusions 41 will come into contact with the drug and exert a squeezing effect on the drug, which can directly break up the agglomerates of the surrounding drug and disperse the clumping phenomenon between the drugs, thereby improving the overall dispersion efficiency of the drug and further improving the efficiency of subsequent granulation. The inside of the protrusions 41 is filled with paraffin. During the process of the protrusions 41 contacting the drug and dispersing it, when the heat generated by friction is too high, the solid paraffin absorbs the heat on the surface of the protrusions 41 and melts it, thereby maintaining the temperature of the protrusions 41 and the surrounding drug, avoiding the reduction of the activity of the heat-sensitive material in the drug due to excessive heat, thus ensuring the overall quality of the drug.
[0022] Furthermore, the surface of the inner roller 4 is provided with several telescopic grooves 43, and six telescopic grooves 43 are arranged symmetrically as a group. A blade 44 is slidably connected to the inner wall of the telescopic groove 43. A positioning block 444 is fixedly connected to one end of the blade 44 near the interior of the inner roller 4. A fixed shaft 5 extending into the interior of the inner roller 4 is fixedly connected to one side of the side plate 31. Multiple equidistantly distributed extrusion blocks 51 are fixedly connected to the outer wall of the fixed shaft 5. Each extrusion block 51 is made of three protruding arc-shaped blocks fixedly connected. A groove 511 is provided on the side wall of the extrusion block 51. A rotating ring 52 is rotatably connected to the inner wall of the groove 511. Six symmetrically arranged springs 521 are installed on the side wall of the ring 52. The two end side walls of each spring 521 are fixedly connected to the side walls of the rotating ring 52 and the positioning block 444, respectively. Symmetrical mounting grooves 431 are opened on both sides of the telescopic groove 43. An air bag 45 is installed on the inner wall of the mounting groove 431. An air passage 441 is opened inside the blade 44. The air port of the air bag 45 is fixedly connected to the outer wall of the blade 44 near the air passage 441. A cavity 442 communicating with the air passage 441 is opened inside the blade 44. Penetrating air holes 443 are opened on the inner walls of both sides of the blade 44 near the cavity 442.
[0023] It should be noted that: the outer wall of the inner roller 4 is provided with several blades 44 arranged in a staggered manner with the protrusions 41, and they rotate simultaneously with the inner roller 4. A linear cutting force is applied to the drug through the sharp blades. When the drug agglomerates come into contact with the blades 44, the blades will quickly cut into the interior of the agglomerates and cut them directly. This cutting action can destroy the structure of the drug agglomerates, making them into smaller particles or a loose state, thereby ensuring the drug dispersion effect. Meanwhile, during the rapid cutting process, the blade 44 requires less force to cut the drug due to the wind force of the blade 44, thus reducing the friction and heat generated during friction. Combined with the oscillation of the roller assembly 3, the surrounding air forms an airflow, which carries away some heat, thereby reducing the temperature of the blade 44 and the surrounding drug to a certain extent. This protects the activity of the heat-sensitive components in the drug and ensures that the quality of the drug is not affected. At the same time, the surface of the blade 44 is provided with an anti-stick Teflon coating, which effectively prevents the drug from adhering to the blade 44 during the cutting process, thus preventing the drug adhering to the blade 44 from affecting subsequent cutting and ensuring the effect of subsequent drug dispersion. While the roller assembly 3 swings, its internal fixed shaft 5 drives multiple outer extrusion blocks 51 and the inner roller 4 to swing in opposite directions. During the swing, the protrusions of the extrusion blocks 51 slowly contact the positioning block 444 at one end of the blade 44. In this process, the blade 44 stretches the spring 521 and slides outward toward the telescopic groove 43. When the positioning block 444 disengages from the extrusion block 51, the spring 521 rebounds, causing the blade 44 to retract into the telescopic groove 43 to prepare for the next extension. In this way, the blade 44 retracts back and forth during the swing, thus performing intermittent cutting. When the blade 44 extends outward, it will cut the roller. The agglomerates are cut, and when the blade 44 retracts, it applies an impact force to the agglomerates. This combined cutting and impact force can more effectively destroy the structure of drug agglomerates and improve the drug fragmentation effect. At the same time, since the sidewall of the extrusion block 51 is only provided with three arc-shaped protrusions, the adjacent blades 44 will cross and extend during the swinging process, forming an intermittent high-shear zone. In this zone, the local pressure peak will be increased. When the agglomerates pass through this zone, they will be subjected to strong shear force, which can directly cut the fibrous clumps and soft agglomerates in the drug, making the drug easier to disperse, thereby further improving the efficiency of subsequent drug granulation. During the reciprocating cutting process of the blade 44, the positioning block 444 at the end of the blade 44 will squeeze the airbags 45 on both sides as the blade 44 extends. During the squeezing process, the airbags 45 will contract into the mounting groove 431. At the same time, the air inside the airbags 45 will enter the cavity 442 inside the blade 44 through the air passage 441. When the air enters the cavity 442, the air pressure in the cavity 442 will gradually increase. Under the action of pressure, the air will be ejected outward from the blow holes 443 on both sides of the blade 44. The blown airflow and the cutting of the blade 44 form a compound shear force, thereby penetrating the drug agglomerates and further dispersing the drug, improving the dispersion efficiency. At the same time, the blown airflow can carry away the heat generated by friction during the cutting process, which can accelerate the heat transfer and dissipation, thereby reducing the temperature of the blade 44 and the surrounding drug, thus protecting the activity of the heat-sensitive components in the drug and ensuring that the quality of the drug is not affected.
[0024] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.
[0025] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.
Claims
1. A pharmaceutical granulator with a gyratory action, comprising a control box (1) and a feeding frame (2) disposed on the side wall of the control box (1), characterized in that, The control box (1) is equipped with a motor (11) and a reducer (12). A drive slot (13) is provided inside the control box (1) near the reducer (12). A rotating plate (14) and a connecting rod (15) are installed on the inner wall of the drive slot (13). The side wall of the feeding frame (2) is fixedly connected to the side wall of the control box (1). A feeding pipe (21) is installed on the lower inner wall of the feeding frame (2). A screen (22) is installed on the inner wall of the feeding frame (2). A roller assembly (3) is installed inside the feeding frame (2). The roller assembly (3) includes a side plate (31), a pressure rod (32), and an internal toothed ring (33). An inner roller (4) is installed on the inner wall of the roller assembly (3), and the surface of the inner roller (4) is provided with a plurality of protrusions (41).
2. The pharmaceutical production swing-type granulator according to claim 1, characterized in that, The output end of the motor (11) and the input end of the reducer (12) are fixedly connected. The two sides of the rotating plate (14) are respectively symmetrically fixedly connected with a drive shaft (141) and a limiting shaft (142). The outer wall of the drive shaft (141) and the inner wall of the drive groove (13) are rotatably connected. The output end of the reducer (12) and one end of the drive shaft (141) are fixedly connected. The inner wall of one end of the connecting rod (15) and the outer wall of the limiting shaft (142) are rotatably connected.
3. A pharmaceutical granulator with a gyratory action as described in claim 2, characterized in that, The screen (22) is installed on the inner wall of the feeding frame (2) by insertion. The outer wall of the side plate (31) is rotatably connected to the inner wall of the feeding frame (2). Multiple pressure rods (32) are fixedly connected between the two side plates (31). A fixing rod (311) is fixedly connected to the side wall of one of the side plates (31). An eccentric shaft (312) is fixedly connected to the outer wall of one side of the fixing rod (311) and rotatably connected to the inner wall of one end of the connecting rod (15).
4. A pharmaceutical granulator with a gyratory action as described in claim 3, characterized in that, One end of the other side plate (31) is fixedly connected to an internal gear ring (33) that meshes with the drive gear (23), one end of the inner roller (4) is fixedly connected to a rotating shaft (42) that rotatably connects to the inner wall of the side plate (31), and the outer wall of the rotating shaft (42) is fixedly connected to a driven gear (421) that meshes with the drive gear (23). The protrusion (41) is hollow.
5. A pharmaceutical granulator with a gyratory action as described in claim 1, characterized in that, The inner roller (4) has several telescopic grooves (43) on its surface. Six telescopic grooves (43) are arranged symmetrically as a group. A blade (44) is slidably connected to the inner wall of the telescopic groove (43). A positioning block (444) is fixedly connected to one end of the blade (44) near the inside of the inner roller (4).
6. A pharmaceutical granulator with a gyratory action as described in claim 5, characterized in that, One side of the side plate (31) is fixedly connected to a fixed shaft (5) that extends into the inner roller (4). The outer wall of the fixed shaft (5) is fixedly connected to a plurality of equally spaced extrusion blocks (51). The extrusion blocks (51) are made of three extended arc-shaped blocks fixedly connected together. The side wall of the extrusion block (51) is provided with a groove (511). The inner wall of the groove (511) is rotatably connected to a rotating ring (52). The side wall of the rotating ring (52) is equipped with six axially symmetrically arranged springs (521). The two ends of each spring (521) are fixedly connected to the side walls of the rotating ring (52) and the positioning block (444), respectively.
7. A pharmaceutical granulator with a gyratory action as described in claim 6, characterized in that, The telescopic groove (43) has symmetrical mounting grooves (431) on both sides. An airbag (45) is installed on the inner wall of the mounting groove (431). An air passage (441) is opened inside the blade (44). The air inlet of the airbag (45) and the outer wall of the blade (44) near the air passage (441) are fixedly connected.
8. A pharmaceutical granulator with a gyratory action as described in claim 7, characterized in that, The blade (44) has a cavity (442) that communicates with the air passage (441) inside, and the blade (44) has penetrating air holes (443) on the inner walls of both sides near the cavity (442).