Dry-method granulator
By introducing multi-directional spiral blades and guide plates into the dry granulator, the problems of short material granulation time and non-adjustable reflux ratio are solved, realizing the improvement and flexible adjustment of particulate matter to meet production needs.
Patent Information
- Application Number
- CN202512015529.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-02-10
AI Technical Summary
Existing dry granulation machines suffer from problems such as short material granulation time, insufficient granulation strength, and inability to flexibly adjust the reflux ratio, resulting in poor granulation effect and failure to meet production needs.
The system combines a screw conveyor with a rotary drum, and extends the material granulation time by setting multi-directional screw blades and a material digging component. The return ratio is adjusted by a guide plate to control the particle size, thus achieving flexible adjustment.
It extends the material granulation time, improves the quality of the particles, and allows for adjustment of particle size as needed to meet user requirements.
Smart Images
Figure CN121490656A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of granulator equipment, and particularly relates to a dry granulator. BACKGROUND
[0002] The dry granulation technology is used for processing loose powdery materials into particles with certain strength and granularity, so as to facilitate subsequent storage, transportation, metering and processing use, and is widely applied in many fields such as medicine, food, chemical industry, building materials and the like. However, the current dry granulator has many problems in actual application: first, since the time of the material in the granulator is short, the material cannot be effectively agglomerated into particles, the granulation strength is insufficient, the effect is poor, and it does not meet the subsequent processing requirements. Second, since the position where the positive and negative blades intersect in the screw conveyor is fixed, the backflow ratio of the material cannot be adjusted, so that the workers cannot flexibly adjust the size of the granulation according to the production needs, and the particle discharge speed is slow, which cannot meet the needs of production. SUMMARY
[0003] In view of the above problems that the current dry granulator has a short material granulation time and cannot adjust the backflow ratio according to needs, the present application provides a dry granulator.
[0004] In order to solve the above technical problems, the present application adopts the following technical scheme: A dry granulator includes a screw conveying mechanism and a rotating drum, the screw conveying mechanism includes a sleeve and a shaft tube, the shaft tube is arranged in the sleeve and is rotationally connected with the sleeve. A plurality of helical blade segments are arranged on the shaft tube, and the rotation directions of adjacent helical blade segments are opposite. A feeding port is formed on one side of the sleeve, and a discharging port is formed on the other side of the sleeve, and a first backflow port and a second backflow port are also formed on the sleeve; the rotating drum is sleeved on the sleeve and is rotationally connected with the sleeve, a material digging assembly is arranged in the rotating drum, the material digging assembly is close to the second backflow port, and a guide plate is arranged in the second backflow port.
[0005] Further, a first support, a second support and a driving assembly are further included, the sleeve is fixedly connected with the first support and the second support. The rotating drum is arranged in an inclined manner between the first support and the second support and is rotationally connected with the first support and the second support through bearings. The driving mechanism includes a first motor and a second motor, the first motor is transmissionally connected with the rotating drum, and the second motor is transmissionally connected with the shaft tube.
[0006] Furthermore, the first reflux port is located near the feed port and at the bottom of the sleeve, while the second reflux port is located near the discharge port and at the top of the sleeve. Both the first and second reflux ports are located inside the rotating drum, and both are located near the junction between the spiral blade segments.
[0007] Furthermore, the helical blade segment includes a first forward helical blade segment, a second forward helical blade segment, a first reverse helical blade segment, and a second reverse helical blade segment. The first reverse helical blade segment is located between the first forward helical blade segment and the second forward helical blade segment. The second reverse helical blade segment is located at the rear of the sleeve and intersects with the second forward helical blade segment. The discharge port is located near the intersection of the second forward helical blade segment and the second reverse helical blade segment.
[0008] Furthermore, the top of the sleeve is connected to an L-shaped scraper via several support rods.
[0009] Furthermore, the rotating drum is provided with an annular partition, and the partition has several flow ports near the edge of the rotating drum.
[0010] Furthermore, the material-digging assembly includes a first side plate, a second side plate, and several arc-shaped plates. The first side plate and the second side plate are both annular and are fitted onto the sleeve. Each of the arc-shaped plates is disposed between the first side plate and the second side plate and arranged along the rotation direction of the rotating drum.
[0011] Furthermore, the bottom end of the guide plate is rotatably connected to the inner wall of the second return port via a rotating shaft, and a plurality of arc-shaped limiting holes are provided on the inner wall of the second return port. A limiting pin is detachably installed in the limiting hole, and the limiting pin is used to adjust the tilt angle of the guide plate.
[0012] Furthermore, a discharge box is fitted onto the sleeve, and a screening tube is installed inside the discharge box. The screening tube is fitted onto the sleeve and rotates relative to the sleeve, with the discharge port located in the screening tube. The bottom of the discharge box is provided with a first discharge port and a second discharge port, both of which are funnel-shaped.
[0013] Furthermore, the screening pipe is a reducing pipe with an opening at the rear end. Several screen holes are formed on the side wall of the screening pipe, and several connecting rods are fixed to the side wall. The first discharge port is located below the side wall of the screening pipe, and the second discharge port is located below the opening.
[0014] The beneficial effects of this invention are: this invention uses several spiral blades with different rotation directions to cooperate with the material digging component to realize the return of materials, extend the granulation time of materials, improve the quality of particles, and utilize the guide plate located at the second return port to flexibly adjust the return ratio as needed, thereby adjusting the particle size to meet the user's needs. Attached Figure Description
[0015] Figure 1 The diagram shown is a schematic representation of the structural principle of one embodiment of the present invention.
[0016] Figure 2 As shown Figure 1 Top view.
[0017] Figure 3 As shown Figure 2 Sectional view at point A in the middle.
[0018] Figure 4 As shown Figure 3 A side view.
[0019] Figure 5 As shown Figure 4 Enlarged view of the local structure at point B.
[0020] Figure 6 for Figure 4 The partial structural diagram shows the structure of the excavation assembly.
[0021] Figure 7 for Figure 4 The partial diagram shows the structure of the screening tube.
[0022] Figure 8 As shown Figure 7 A side view.
[0023] Explanation of reference numerals in the attached drawings: 1. Sleeve; 2. Inlet; 3. Outlet; 4. Second reflux port; 5. First reflux port; 6. Shaft tube; 7. First forward spiral blade segment; 8. First reverse spiral blade segment; 9. Second forward spiral blade segment; 10. Rotary drum; 11. Scraper; 12. Baffle plate; 13. Material digging assembly; 1301. First side plate; 1302. Second side plate; 1303. Arc plate; 14. Discharge box; 15. Screening pipe; 1501. Connecting rod; 16. First discharge port; 17. Second discharge port; 18. Guide plate; 19. Limiting hole; 20. Second reverse spiral blade segment. Detailed Implementation
[0024] This invention discloses a dry granulation machine. The following describes one embodiment of the invention in detail with reference to the accompanying drawings.
[0025] like Figure 1As shown, a dry granulator includes a first support, a second support, a drive mechanism, a screw conveyor mechanism, and a rotating drum 10. The screw conveyor mechanism includes a sleeve 1 and a shaft tube 6. One end of the sleeve 1 is fixedly connected to the first support, and the other end is fixedly connected to the second support. The shaft tube 6 is disposed inside the sleeve 1 and is rotatably connected to the sleeve 1. The shaft tube 6 is provided with a first positive spiral blade segment 7, a second positive spiral blade segment 9, a first negative spiral blade segment 8, and a second negative spiral blade segment 20. The first negative spiral blade segment 8 is located between the first positive spiral blade segment 7 and the second positive spiral blade segment 9. The second negative spiral blade segment 20 is located at the rear of the sleeve and connects with the second positive spiral blade segment 9. The first positive spiral blade segment 7, the second positive spiral blade segment 9, and the second negative spiral blade segment 8 cooperate to achieve material reflux, and the second negative spiral blade segment 20 is used to achieve smooth material discharge. A feed pipe is connected to the top front side of the sleeve 1, and a feed inlet 2 is opened at the feed pipe. A discharge outlet 3 is opened at the bottom rear side of the sleeve 1. On the sleeve 1 located between the feed inlet 2 and the discharge outlet 3, a first reflux port 5 and a second reflux port 4 are also provided. The first reflux port 5 is close to the feed inlet 2, located at the bottom of the sleeve 1, and is near the intersection of the first positive spiral blade segment 7 and the first negative spiral blade segment 8. The second reflux port 4 is close to the discharge outlet 3, located at the top of the sleeve 1, and is near the intersection of the second positive spiral blade segment 9 and the first negative spiral blade segment 8. The discharge outlet 3 is near the intersection of the second positive spiral blade segment 9 and the second negative spiral blade segment 20, which is used to prevent material accumulation and ensure smooth material discharge.
[0026] The rotating drum 10 is inclinedly positioned between the first and second supports and is rotatably connected to them via bearings. The rotating drum 10 is fitted onto the sleeve 1 and rotatably connected to it. The inlet 2 and outlet 3 are located outside the rotating drum 10, while the first return port 5 and second return port 4 are located inside. A baffle 12 and a material-digging assembly 13 are installed inside the rotating drum 10. The baffle 12 is located in the middle of the rotating drum 10. The baffle 12 is annular, fitted onto the sleeve, and fixedly connected to the inner wall of the rotating drum 10, reinforcing the structure of the rotating drum 10 and preventing structural deformation due to excessive length. Several arc-shaped flow ports are provided on the baffle 12 near the edge of the rotating drum 10. The top of the sleeve 1 is connected to a scraper 11 via several support rods. The scraper 11 is divided into a first scraper and a second scraper, both of which are L-shaped and used to scrape off the material adhering to the inner wall of the rotating drum 10. There is a gap between the first scraper and the second scraper that is adapted to the partition 12, so that the partition 12 can pass through the gap between the first scraper and the second scraper as the rotating drum 10 rotates. The material digging assembly 13 is fixedly connected to the rear of the rotating drum 10. The material digging assembly 13 includes a first side plate 1301, a second side plate 1302, and several arc-shaped plates 1303. The first side plate 1301 and the second side plate 1302 are both annular and are fitted onto the sleeve 1 at the location of the second return port 4. Each arc-shaped plate 1303 is fixedly connected between the first side plate 1301 and the second side plate 1302 and is arranged along the rotation direction of the rotating drum 10 to facilitate digging out the material and sending it into the second return port 4.
[0027] A guide plate 18 is rotatably connected to the second return port 4, and the arrangement direction of the guide plate 18 is perpendicular to the axis of the material digging assembly 13. The bottom of the guide plate 18 is rotatably connected to the inner wall of the second return port 4 via a rotating shaft, and a plurality of arc-shaped limiting holes 19 are provided on the inner wall of the second return port 4. Limiting pins are detachably connected to the limiting holes 19. By connecting the limiting pins to different limiting holes 19, the tilt angle of the guide plate 18 can be adjusted, thereby adjusting the material return ratio.
[0028] The drive mechanism includes a first motor and a second motor. A first gear is connected to the drive shaft of the first motor, and a second gear is fixedly connected to the outer wall of the rotating drum 10. The first gear and the second gear mesh and drive each other. The first motor is used to drive the rotating drum 10 to rotate relative to the sleeve 1. A first sprocket is connected to the drive shaft of the second motor, and a second sprocket is connected to the front end of the shaft tube 6. The first sprocket and the second sprocket are connected by a chain drive. The second motor is used to drive the shaft tube 6 to rotate relative to the sleeve 1.
[0029] A discharge box 14 is fitted onto the rear of the sleeve 1, and the discharge box 14 is fixedly connected to the second support. A screening pipe 15 is installed inside the discharge box 14, fitted onto the sleeve 1, and fixedly connected to the rotating drum 10, allowing the screening pipe 15 to rotate relative to the discharge box 14 and the sleeve 1 under the influence of the rotating drum 10. The screening pipe 15 is a reducing pipe, with the diameter of the front side smaller than the diameter of the rear side, facilitating the backward movement of the formed material under gravity. The rear end of the screening pipe 15 has an opening, and several screen holes are formed on its side wall. Several connecting rods 1501 are fixedly connected to the inner wall of the screening pipe 15 along the front-to-back direction. The bottom of the discharge box 14 is provided with a first discharge port 16 and a second discharge port 17. Both the first discharge port 16 and the second discharge port 17 are funnel-shaped. The first discharge port 16 is located below the side wall of the screening tube 15, and the second discharge port 17 is located below the opening.
[0030] In operation, the operator feeds the powdered material into the sleeve 1 through the feed inlet 2. The shaft tube 6 uses a positive spiral blade segment to convey the powdered material backward, and then it enters the rotating drum 10 through the first return port 5. As the rotating drum 10 rotates continuously, the powdered material is aggregated into granules by intermolecular forces. The granules and powdered material are conveyed backward along the inclined rotating drum 10 under the action of gravity, and then scooped up by the digging component 13, which rotates synchronously with the rotating drum 10, using the arc plate 1303. When the arc plate 1303 rotates above the second return port 4, the granules and powdered material are simultaneously fed into the second return port 4. A guide plate 18 is provided at the second return port 4. The operator can adjust the position of the limiting pin to adjust the tilt angle of the guide plate 18, thereby adjusting the return ratio. When the guide plate 18 is tilted towards the first reverse spiral blade segment 8, it diverts the material entering the second return port 4, causing most of the material to enter the second positive spiral blade segment 9, be conveyed backward, and exit the sleeve 1 from the discharge port 3; while a small portion of the material enters the first reverse spiral blade segment 8, is conveyed forward, and re-enters the rotating drum 10 from the first return port 5 for polymerization.
[0031] Granular and powdery materials enter the screening tube 15 through the discharge port 3. The screening tube 15 is connected to the rotating drum 10 and rotates synchronously. The screening tube 15 uses the sieve holes on its side wall to separate the powdery materials, which are then discharged through the first discharge port 16. Several connecting rods 1501 are provided on the inner wall of the screening tube 15. The connecting rods 1501 are used to collide with the granular materials during their rolling process, shaking off the powdery materials adhering to the granular materials and ensuring the cleanliness of the granular materials. The screening tube 15 is a reducing tube, which makes the inner wall inclined backward, facilitating the backward movement of the granular materials and their discharge through the second discharge port 17.
[0032] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. A dry granulation machine, characterized in that: The device includes a screw conveyor mechanism and a rotating drum (10). The screw conveyor mechanism includes a sleeve (1) and a shaft tube (6). The shaft tube (6) is disposed inside the sleeve (1) and is rotatably connected to the sleeve (1). The shaft tube (6) is provided with a plurality of helical blade segments, and the rotation directions of adjacent helical blade segments are opposite. The sleeve (1) has a feed inlet (2) on one side and a discharge outlet (3) on the other side. The sleeve (1) is also provided with a first return port (5) and a second return port (4). The rotating drum (10) is sleeved on the sleeve (1) and is rotatably connected to the sleeve (1). The rotating drum (10) is provided with a digging component (13). The digging component (13) is close to the second return port (4). The second return port (4) is provided with a guide plate (18).
2. The dry granulator according to claim 1, characterized in that: It also includes a first bracket, a second bracket, and a drive assembly, wherein the sleeve (1) is fixedly connected to the first bracket and the second bracket; The rotating drum (10) is inclined between the first support and the second support, and is rotatably connected to the first support and the second support through bearings; The drive mechanism includes a first motor and a second motor. The first motor is connected to the rotating drum (10) and the second motor is connected to the shaft tube (6).
3. A dry granulator according to claim 1, characterized in that: The first reflux port (5) is close to the feed port (2) and located at the bottom of the sleeve (1), and the second reflux port (4) is close to the discharge port (3) and located at the top of the sleeve (1); The first reflux port (5) and the second reflux port (4) are both located inside the rotating drum (10), and the first reflux port (5) and the second reflux port (4) are both located near the junction between the spiral blade segments.
4. A dry granulator according to claim 1, characterized in that: The spiral blade segment includes a first positive spiral blade segment (7), a second positive spiral blade segment (9), a first negative spiral blade segment (8), and a second negative spiral blade segment (20). The first negative spiral blade segment (8) is located between the first positive spiral blade segment (7) and the second positive spiral blade segment (9). The second negative spiral blade segment (20) is located at the rear of the sleeve and intersects with the second positive spiral blade segment (9). The discharge port (3) is located near the junction between the second positive spiral blade segment (9) and the second negative spiral blade segment (20).
5. A dry granulator according to claim 1, characterized in that: The top of the sleeve (1) is connected to an L-shaped scraper (11) by several support rods.
6. A dry granulator according to claim 1, characterized in that: The rotating drum (10) is provided with an annular partition (12), and several flow ports are provided on the partition (12) near the edge of the rotating drum (10).
7. A dry granulator according to claim 1, characterized in that: The material excavation assembly (13) includes a first side plate (1301), a second side plate (1302), and several arc-shaped plates (1303). The first side plate (1301) and the second side plate (1302) are both annular and are fitted onto a sleeve. Each of the arc-shaped plates (1303) is disposed between the first side plate (1301) and the second side plate (1302) and is arranged along the rotation direction of the rotating cylinder (10).
8. A dry granulator according to claim 1, characterized in that: The bottom end of the guide plate (18) is rotatably connected to the inner wall of the second return port (4) via a rotating shaft, and a plurality of arc-shaped limiting holes (19) are provided on the inner wall of the second return port (4). A limiting pin is detachably provided in the limiting hole (19), and the limiting pin is used to adjust the tilt angle of the guide plate (18).
9. A dry granulator according to claim 1, characterized in that: The sleeve (1) is fitted with a discharge box (14), and a screening tube (15) is provided inside the discharge box (14). The screening tube (15) is fitted on the sleeve (1) and rotates relative to the sleeve (1). The discharge port (3) is located in the screening tube (15). The bottom of the discharge box (14) is provided with a first discharge port (16) and a second discharge port (17), both of which are funnel-shaped.
10. A dry granulator according to claim 9, characterized in that: The sieve tube (15) is a reducing tube with an opening at the rear end. Several sieve holes are opened on the side wall of the sieve tube (15), and several connecting rods (1501) are fixed on the side wall. The first discharge port (16) is located below the side wall of the screening tube (15), and the second discharge port (17) is located below the opening.