Rotary granulator for preparing medicines

Abstract

The invention provides a rotary granulator for preparing medicines, which comprises a granulating barrel, and further comprises a plurality of annular screens with different pore diameters, a plurality of rotary blades, a plurality of rotary blades, a plurality of rotary blades, a plurality of rotary blades and a plurality of rotary blades, the hopper is fixedly mounted at a barrel opening of the granulating barrel through a fixing arm, and the material barrel is telescopically arranged on a discharging section at the bottom of the hopper in a sleeving manner; the multiple pre-extrusion barrels are fixedly communicated to the bottom of the charging barrel in the circumferential direction, the tail ends of the pre-extrusion barrels are fixedly provided with extrusion ends, the interiors of the pre-extrusion barrels are rotationally connected with spiral extrusion augers, the extrusion ends abut against the inner wall of the annular screen, and after raw materials are pre-extruded through the spiral extrusion augers, particles are extruded through the annular screen; the lifting base is mounted at the bottom of the granulating barrel, and a driving mechanism is mounted at the bottom. According to the granulator, a pre-extrusion mode is adopted, so that materials extruded out of the screen mesh are more compact and uniform, the extruded particles are uniform and compact in size, and rapid adjustment can be realized according to the particle size.

Description

Technical Field

[0001] The present invention relates to the technical field of granulating devices, and particularly to a rotary granulator for preparing pharmaceuticals. Background Art

[0002] A pharmaceutical rotary granulator is a device that forms uniform granules by forcing wet powder raw materials through a stainless steel screen or sieve tube by a set of relatively rotating milling cutters and pressing leaves. Its core principle is to use a gear speed change system to drive the milling cutters and pressing leaves to make relative rotational movements. The pressing leaves press down the material through the inclined leaf surface, and the milling cutters push the material towards the outer wall of the sieve tube by centrifugal force and extrude it through the sieve holes to form granules of the required particle size.

[0003] However, when the milling cutters of the existing rotary granulator extrude the material, it is not easy to control the extrusion amount, and the extrusion amount is uneven, resulting in uneven particle sizes of the extruded granules, insufficiently compact particle density, easy dispersion, and it is more troublesome to replace the sieve according to different requirements of particle sizes. Summary of the Invention

[0004] In view of the above problems, the present invention provides a rotary granulator for preparing pharmaceuticals. This granulator adopts a pre-extrusion method to make the material extruded through the sieve more compact and uniform, the extruded granules have uniform sizes and are compact, and it can also be quickly adjusted according to the particle size.

[0005] To solve the above problems, the technical solution adopted by the present invention is: A rotary granulator for preparing pharmaceuticals, including a granulating barrel, and further including: Multiple annular sieves with different pore sizes, connected in series on the granulating barrel, for extruding pharmaceutical granules with different particle sizes; A hopper and a barrel. The hopper is fixedly installed at the mouth of the granulating barrel through a fixed arm, and the barrel is telescopically sleeved on the discharging section at the bottom of the hopper; Multiple pre-extrusion barrels, circumferentially and fixedly connected to the bottom of the barrel, with an extrusion end fixed at the end, internally rotatably connected with a spiral extrusion auger. The extrusion end abuts against the inner wall of the annular sieve, and after the raw material is pre-extruded by the spiral extrusion auger, it is then extruded through the annular sieve to form granules; A lifting base, installed at the bottom of the granulating barrel, and a driving mechanism is installed at the bottom for driving the multiple pre-extrusion barrels to rotate circumferentially and driving the multiple spiral extrusion augers to rotate synchronously.

[0006] Preferably, two sides at the bottom of the granulating barrel are fixedly installed with legs, and vertical hydraulic cylinders are installed on the legs. The telescopic end of the hydraulic cylinder is fixedly connected to the lifting base, and the size of the lifting base is adapted to the size of the granulating barrel.

[0007] Preferably, the driving mechanism includes a first driving component for driving the barrel to rotate, and also includes a second driving component for driving a plurality of spiral extrusion augers to rotate synchronously.

[0008] Preferably, the first driving assembly includes a bracket fixedly mounted on the bottom of the lifting base, a first motor is mounted on the bracket, an output end of the first motor is fixedly connected to a driving shaft, a rotating drum is fixedly connected to the bottom of the barrel, the rotating drum passes through the lifting base and is rotatably connected thereto, and the driving shaft and the rotating drum are transmission-connected via a first gear set.

[0009] Preferably, the second driving assembly includes a conical seat fixedly mounted on the bottom of the barrel, a transmission assembly is arranged in the conical seat, the transmission assembly is connected with a transmission shaft, the transmission shaft passes through the rotating drum, and the through section of the transmission shaft is connected to the driving shaft through a second gear set.

[0010] Preferably, the transmission assembly includes a transmission cavity arranged in the top of the conical seat, the upper end of the transmission shaft extends into the transmission cavity, and the shaft ends of the plurality of spiral extrusion augers extend into the transmission cavity and are connected to the transmission shaft through a bevel gear set.

[0011] Preferably, an annular material dropping channel is provided at the inner bottom of the lifting base, and a plurality of material dropping openings are provided at the circumference of the bottom of the annular material dropping channel.

[0012] Preferably, vertical particle blowing air ducts are fixed on both sides of the extrusion end, a fan is installed on the bracket, the air outlet end of the fan is connected to the air outlet pipe, the transmission shaft is hollow, the lower end of the transmission shaft is connected to the air outlet pipe through a rotating joint, the bottom of the conical seat has an air cavity for the transmission shaft to pass through, and the side wall of the transmission shaft located in the air cavity is provided with multiple air outlets, and the multiple particle blowing air ducts are connected to the air cavity through multiple connecting pipes.

[0013] Preferably, the bottom side wall of the granulating barrel is provided with an annular discharge tray, the side wall of the support leg is fixedly mounted with a second motor, a gear is fixed to the output end of the second motor, and a gear ring meshing with the gear is fixed to the bottom of the annular discharge tray.

[0014] Preferably, a heating plate distributed in a ring shape is installed in the annular discharge tray, a conductive ring is fixed on the inner side of the annular discharge tray, the conductive ring is rotatably connected to the bottom side wall of the granulation barrel, and a conductive head in contact with the conductive ring is embedded in the bottom side wall of the granulation barrel.

[0015] The beneficial effects of the present invention are: 1. By installing a granulation barrel, a ring-shaped screen, a hopper, a barrel, a pre-extrusion barrel and a driving mechanism, the material is poured into the hopper, falls into the barrel, and then enters multiple pre-extrusion barrels through a conical seat respectively. Start the first motor, drive the transmission shaft to rotate through the second gear set, and then drive multiple spiral extrusion augers to rotate through the bevel gear set. The material is conveyed from the thick section to the thin section of the pre-extrusion barrel, compacting the material so that the material enters the extrusion end tightly, and then acts on the abutted ring-shaped screen, squeezing through the mesh holes. The drive shaft drives the rotating cylinder to rotate through the first gear set, then drives the barrel to rotate, and finally drives multiple pre-extrusion barrels to rotate circumferentially, cutting off the extruded material to form medicine particles. Through circumferential rotation, the process of circumferential granulation is realized, and the particle size is uniform, more compact and not easy to disperse.

[0016] 2. By installing a lifting base and multiple serially connected ring-shaped screens with different pore diameters, different ring-shaped screens can be selected according to the particle size. Just start a pair of hydraulic cylinders to drive the lifting base to rise and fall, and multiple pre-extrusion barrels can be driven to rise and fall to the height corresponding to the ring-shaped screen, realizing the switching of particle diameters, which is convenient to use.

[0017] 3. By installing a vertical particle blowing air duct, during the rotary granulation process, start the fan. The air enters the rotating transmission shaft through the air outlet pipe, then enters the air cavity through the air outlet, and finally is blown into the particle blowing air duct through the connecting pipe, and is blown from the vertical air outlet of the particle blowing air duct to the ring-shaped screen, blowing out the particles blocked in the mesh holes, improving the granulation efficiency, and at the same time avoiding secondary extrusion and causing uneven particles.

[0018] 4. By installing a ring-shaped blanking plate, the extruded particles fall on the ring-shaped blanking plate. Start the second motor, drive the gear ring to rotate through the gear, and then drive the ring-shaped blanking plate to rotate, making the particles on its surface roll, shaping the particles, and finally being thrown out under the centrifugal force to complete the blanking process. At the same time, the conducting head supplies power to the conducting ring, realizing the power supply process of the heating plate in the rotating state, making the ring-shaped blanking plate in a heated state, and further improving the shaping and curing effect during the shaping and blanking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional view of the present invention; Figure 2 is a top three-dimensional view of the present invention; Figure 3 is a three-dimensional schematic diagram of the barrel and multiple pre-extrusion barrels proposed by the present invention; Figure 4 is a cross-sectional view of the present invention; Figure 5 is a structural schematic diagram of the driving mechanism proposed by the present invention; Figure 6 is Figure 4 an enlarged schematic diagram of the structure at A in

[0020] In the figure: 1 granulation barrel, 2 fixed arm, 3 hopper, 4 barrel, 5 annular screen, 6 pre-extrusion barrel, 7 extrusion auger, 8 lifting base, 9 hydraulic cylinder, 10 blanking port, 11 support, 12 fan, 13 rotating cylinder, 14 first motor, 15 second motor, 16 slip ring, 17 annular blanking plate, 18 heating plate, 19 gear ring, 20 gear, 21 first gear set, 22 second gear set, 23 air outlet pipe, 24 transmission shaft, 25 drive shaft, 26 particle blowing air duct, 27 support leg, 28 extrusion end, 29 transmission cavity, 30 bevel gear set, 31 air outlet, 32 air cavity, 33 connecting pipe, 34 conical seat. Specific embodiments

[0021] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0022] Embodiment 1 Refer to Figures 1-6 , a rotary granulator for preparing medicines, including a granulation barrel 1, and further including: a plurality of annular screens 5 with different pore diameters, connected in series on the granulation barrel 1; a hopper 3 and a barrel 4, the hopper 3 is fixedly installed at the barrel mouth of the granulation barrel 1 through a fixed arm 2, and the barrel 4 is telescopically sleeved on the discharge section at the bottom of the hopper 3; a plurality of pre-extrusion barrels 6, circumferentially and fixedly connected to the bottom of the barrel 4, with an extrusion end 28 fixed at the end, and a spiral extrusion auger 7 rotatably connected inside, the extrusion end 28 abuts against the inner wall of the annular screen 5, and after the raw material is pre-extruded by the spiral extrusion auger 7, it is extruded into particles through the annular screen 5.

[0023] A lifting base 8 is installed at the bottom of the granulation barrel 1, and a driving mechanism for driving the circumferential rotation of a plurality of pre-extrusion barrels 6 and driving the synchronous rotation of a plurality of spiral extrusion augers 7 is installed at the bottom. The driving mechanism includes a first driving component for driving the barrel 4 to rotate, and further includes a second driving component for driving the synchronous rotation of a plurality of spiral extrusion augers 7.

[0024] Specifically, the first driving assembly includes a bracket 11 fixedly mounted on the bottom of the lifting base 8, a first motor 14 is mounted on the bracket 11, a driving shaft 25 is fixedly connected to the output end of the first motor 14, a rotating drum 13 is fixedly connected to the bottom of the barrel 4, the rotating drum 13 passes through the lifting base 8 and is rotatably connected thereto, the driving shaft 25 and the rotating drum 13 are connected via a first gear set 21, the driving shaft 25 drives the rotating drum 13 to rotate via the first gear set 21, and then drives the barrel 4 to rotate, and finally drives multiple pre-extrusion barrels 6 to rotate circumferentially, scrapes off the extruded material, forms pharmaceutical particles, and rotates circumferentially to realize the circumferential granulation process.

[0025] Specifically, the second driving assembly includes a conical seat 34 fixedly mounted on the bottom of the barrel 4, a transmission assembly is provided in the conical seat 34, the transmission assembly is connected to a transmission shaft 24, the transmission shaft 24 passes through the rotating drum 13, and the through section of the transmission shaft 24 is connected to the driving shaft 25 through the second gear set 22. The transmission assembly includes a transmission cavity 29 arranged in the top of the conical seat 34, the upper end of the transmission shaft 24 extends into the transmission cavity 29, the shaft ends of the plurality of spiral extrusion augers 7 extend into the transmission cavity 29 and are connected to the transmission shaft 24 through the bevel gear set 30. The first motor 14 is started, the transmission shaft 24 is driven to rotate through the second gear set 22, and then the plurality of spiral extrusion augers 7 are driven to rotate through the bevel gear set 30. The material is transported from the coarse section of the pre-extrusion barrel 6 to the thin section, the material is compacted, and the material is tightly entered into the extrusion end 28, and then acts on the resisting annular screen 5 to squeeze through the mesh.

[0026] Furthermore, legs 27 are fixedly installed on both sides of the bottom of the granulation barrel 1, and vertical hydraulic cylinders 9 are installed on the legs 27. The telescopic ends of the hydraulic cylinders 9 are fixedly connected to the lifting base 8. The size of the lifting base 8 is adapted to the size of the granulation barrel 1. Different annular screens 5 can be selected according to the size of the particles. Only a pair of hydraulic cylinders 9 need to be started to drive the lifting base 8 to rise and fall, and multiple pre-extrusion barrels 6 can be driven to rise and fall to the height of the corresponding annular screen 5, thereby realizing the switching of particle sizes, which is convenient to use.

[0027] In addition, an annular material dropping channel is provided at the inner bottom of the lifting base 8, and a plurality of material dropping openings 10 are provided circumferentially at the bottom of the annular material dropping channel. Excess material generated by cutting and scraping is discharged through the material dropping openings 10, and can be collected again and poured into the hopper 3 again.

[0028] The material is poured into the hopper 3, falls into the barrel 4, and then enters the multiple pre-extrusion barrels 6 through the conical seat 34. The first motor 14 is started, and the transmission shaft 24 is driven to rotate through the second gear set 22, and then the multiple spiral extrusion augers 7 are driven to rotate through the bevel gear set 30. The material is transported from the thick section to the thin section of the pre-extrusion barrel 6, and the material is compacted so that the material enters the extrusion end 28 tightly, and then acts on the resisting annular screen 5 to squeeze through the mesh. The drive shaft 25 drives the rotating drum 13 to rotate through the first gear set 21, and then drives the barrel 4 to rotate, and finally drives the multiple pre-extrusion barrels 6 to rotate circumferentially, scrapes off the extruded material, forms pharmaceutical particles, and rotates circumferentially to realize the circumferential granulation process. The particles are uniform in size, more compact, and not easy to disperse.

[0029] The apertures of the multiple serially connected annular screens 5 are different. Different annular screens 5 can be selected according to the particle size. Just start a pair of hydraulic cylinders 9 to drive the lifting base 8 to move up and down, and then drive multiple pre-extrusion barrels 6 to move up and down to the height of the corresponding annular screen 5, so as to realize the switching of particle size, which is convenient to use.

[0030] Embodiment 2 Reference Figures 1-4 , Figure 6 Vertical particle blowing air ducts 26 are fixed on both sides of the extrusion end 28, a fan 12 is installed on the bracket 11, and the air outlet end of the fan 12 is connected to the air outlet pipe 23, the transmission shaft 24 is hollow, and the lower end of the transmission shaft 24 is connected to the air outlet pipe 23 through a rotating joint, and an air cavity 32 for the transmission shaft 24 to pass through is provided in the bottom of the conical seat 34, and the side wall of the transmission shaft 24 located in the air cavity 32 is provided with a plurality of air ports 31, and the plurality of particle blowing air ducts 26 are connected to the air cavity 32 through a plurality of connecting pipes 33.

[0031] During the rotary granulation process, the fan 12 is started, and the wind enters the rotating transmission shaft 24 through the air outlet pipe 23, and then enters the air cavity 32 through the air port 31, and finally blows into the particle blowing air duct 26 through the connecting pipe 33, and is blown toward the annular screen 5 from the vertical air outlet of the particle blowing air duct 26, so as to blow out the particles blocked in the mesh, thereby improving the granulation efficiency and avoiding secondary extrusion that causes uneven particles.

[0032] Embodiment 3 Reference Figures 1-2 , Figure 4 The bottom side wall of the granulation barrel 1 is sleeved with an annular discharge tray 17, the side wall of the support leg 27 is fixedly mounted with a second motor 15, the output end of the second motor 15 is fixed with a gear 20, the bottom of the annular discharge tray 17 is fixed with a gear ring 19 meshing with the gear 20, a heating plate 18 distributed in an annular shape is installed in the annular discharge tray 17, a conductive ring 16 is fixed on the inner side of the annular discharge tray 17, the conductive ring 16 is rotatably connected to the bottom side wall of the granulation barrel 1, and a conductive head in contact with the conductive ring 16 is embedded in the bottom side wall of the granulation barrel 1.

[0033] The extruded particles fall on the annular blanking plate 17. The second motor 15 is started, and the gear ring 19 is driven to rotate by the gear 20, and then the annular blanking plate 17 is driven to rotate, causing the particles on its surface to roll, shaping the particles, and finally being thrown out under the action of centrifugal force to complete the blanking process. At the same time, the conductive head supplies power to the conductive ring 16 to realize the power supply process of the heating plate 18 in the rotating state, so that the annular blanking plate 17 is in a heated state, and the shaping and curing effect is further improved during the shaping and blanking process.

[0034] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotary granulator for preparing pharmaceuticals, comprising a granulating barrel (1), characterized in that, Also includes: A plurality of annular screens (5) with different apertures are connected in series to the granulation barrel (1) and are used to extrude granules of different particle sizes; A hopper (3) and a barrel (4), wherein the hopper (3) is fixedly mounted at the barrel opening of the granulating barrel (1) via a fixed arm (2), and the barrel (4) is telescopically sleeved on the discharge section at the bottom of the hopper (3); A plurality of pre-extrusion barrels (6) are fixedly connected to the bottom of the barrel (4) in a circumferential direction, an extrusion end head (28) is fixed at the end, and a spiral extrusion auger (7) is rotatably connected inside, the extrusion end head (28) abuts against the inner wall of the annular screen (5), and the raw material is pre-extruded by the spiral extrusion auger (7) and then extruded into particles through the annular screen (5); The lifting base (8) is installed at the bottom of the granulating barrel (1), and a driving mechanism is installed at the bottom that can drive multiple pre-extrusion barrels (6) to rotate circumferentially and drive multiple spiral extrusion augers (7) to rotate synchronously.

2. The rotary granulator for preparing medicines according to claim 1, characterized in that, Support legs (27) are fixedly mounted on both sides of the bottom of the granulating barrel (1), and a vertical hydraulic cylinder (9) is mounted on the support legs (27). The telescopic end of the hydraulic cylinder (9) is fixedly connected to a lifting base (8), and the size of the lifting base (8) is adapted to the size of the granulating barrel (1).

3. The rotary granulator for preparing drugs according to claim 1, wherein, The driving mechanism comprises a first driving component for driving the barrel (4) to rotate, and also comprises a second driving component for driving a plurality of spiral extrusion augers (7) to rotate synchronously.

4. A rotary granulator for preparing pharmaceuticals according to claim 3, characterized in that, The first driving assembly comprises a bracket (11) fixedly mounted on the bottom of the lifting base (8), a first motor (14) being mounted on the bracket (11), an output end of the first motor (14) being fixedly connected to a driving shaft (25), a rotating drum (13) being fixedly connected to the bottom of the barrel (4), the rotating drum (13) passing through the lifting base (8) and being rotatably connected thereto, and a transmission connection between the driving shaft (25) and the rotating drum (13) being provided via a first gear set (21).

5. A rotary granulator for preparing pharmaceuticals according to claim 4, characterized in that, The second driving assembly comprises a conical seat (34) fixedly mounted on the bottom of the barrel (4), a transmission assembly being arranged in the conical seat (34), the transmission assembly being connected to a transmission shaft (24), the transmission shaft (24) passing through the rotating barrel (13), and a through section of the transmission shaft (24) being transmission-connected to the driving shaft (25) via a second gear set (22).

6. A rotary granulator for preparing pharmaceuticals according to claim 5, characterized in that, The transmission assembly comprises a transmission cavity (29) disposed in the top of the conical seat (34), the upper end of the transmission shaft (24) extending into the transmission cavity (29), and the shaft ends of the plurality of spiral extrusion augers (7) extending into the transmission cavity (29) and being transmission-connected to the transmission shaft (24) via a bevel gear set (30).

7. A rotary granulator for preparing pharmaceuticals according to claim 1, characterized in that, An annular material dropping channel is provided at the inner bottom of the lifting base (8), and a plurality of material dropping openings (10) are provided in the circumferential direction of the bottom of the annular material dropping channel.

8. A rotary granulator for preparing pharmaceuticals according to claim 5, characterized in that, On both sides of the extrusion end (28), there are vertically fixed pellet blowing air ducts (26). A fan (12) is installed on the bracket (11). The air outlet end of the fan (12) is connected to an air outlet pipe (23). The transmission shaft (24) is hollow. The lower end of the transmission shaft (24) is docked with the air outlet pipe (23) through a rotary joint. There is an air cavity (32) at the bottom inside the conical seat (34) for the transmission shaft (24) to pass through. The side wall of the transmission shaft (24) located in the air cavity (32) is provided with a plurality of air outlets (31). The plurality of pellet blowing air ducts (26) are connected to the air cavity (32) through a plurality of connecting pipes (33).

9. A rotary granulator for preparing pharmaceuticals according to claim 2, characterized in that, An annular blanking disc (17) is sleeved on the bottom side wall of the granulating barrel (1). A second motor (15) is fixedly installed on the side wall of the support leg (27). The output end of the second motor (15) is fixed with a gear (20). A gear ring (19) meshing with the gear (20) is fixed at the bottom of the annular blanking disc (17).

10. A rotary granulator for preparing pharmaceuticals according to claim 9, characterized in that, An annularly distributed heating plate (18) is installed in the annular blanking disc (17). A conductive ring (16) is fixed on the inner side of the annular blanking disc (17). The conductive ring (16) is rotatably connected to the bottom side wall of the granulating barrel (1). A conductive head in contact with the conductive ring (16) is embedded in the bottom side wall of the granulating barrel (1).

Images