A classifying device for a granulator

Abstract

The utility model provides a kind of grading equipment of granulator, including grading frame, and the grading frame is rotatably connected with the grading cylinder that one end is inclined upward in it.The drive motor is installed in the grading frame at the upward end of grading cylinder, and its power output shaft is connected with the end of grading cylinder;the material guiding passage is outwardly arranged at the downward end of grading cylinder, and the lower end thereof is communicated with the lower end of grading cylinder.Several screening holes are opened on the outer wall of grading cylinder, and the inner diameter gradually increases along the length direction, and multiple spiral lifting blades are arranged on the inner wall.A partition plate is arranged between every two screening holes in the grading frame, and the partition plate is rotatably connected with the grading cylinder through the rotating hole, and the grading frame is separated into multiple screening grooves corresponding to each screening hole by the partition plate, and the screening groove is opened on one side and the bottom is inclined downward to the opening end.The equipment can be classified by rotary drum at the discharge port of granulator, without transfer, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of material granulation technology and relates to a grading device for a granulator. Background Technology In many industrial sectors such as pharmaceuticals, food, chemicals, and feed, granulation is a common unit operation. Its purpose is to process powdered or paste-like materials into granules with specific particle size, density, and flowability to meet the requirements of subsequent processing (such as tableting, packaging, drying, etc.) or performance applications. Granulators, as the core equipment for this process, are widely used in various production lines.

[0002] Common types of granulators include high-speed mixing granulators, fluidized bed granulators, extrusion granulators, and rotary granulators. These devices use methods such as mixing, shearing, spraying, extrusion, or rolling to aggregate materials into granules under specific conditions. However, due to factors such as material properties and fluctuations in process parameters, the granules produced during granulation often have uneven particle size distribution, containing excessively large agglomerates or excessively fine powder, making them difficult to use directly as qualified products.

[0003] Therefore, after granulation, the resulting particles usually need to be graded to screen out finished particles that meet the target particle size range, while separating out oversized particles (too large or too small) for reprocessing or treatment. Currently, most granulation systems adopt a step-by-step process of "granulation-transfer-grading," that is, the particles are first prepared in the granulator, and then the wet or dry particles are transferred to independent grading equipment, such as vibrating screens, drum screens, or air classifiers, via conveying devices (such as vacuum feeders, screw conveyors, or manual transfer) for particle size classification.

[0004] This separation of granulation and grading functions, requiring cross-equipment operation, increases intermediate operation steps and equipment interfaces, which not only leads to a longer overall production cycle but also increases the risk of cross-contamination, while occupying more production space and reducing production efficiency and automation. Utility Model Content

[0005] The purpose of this invention is to provide a grading device for a pellet mill, which can perform grading at the discharge port of the pellet mill using a rotating drum, eliminating the need for transfer and effectively improving production efficiency.

[0006] To solve the above technical problems, this utility model provides a grading device for a granulator, including a grading frame, a grading drum with one end inclined upwards is rotatably connected inside the grading frame, a drive motor is installed on the upward end of the grading drum on the grading frame, the power output shaft of the drive motor is connected to the upward end of the grading drum, and a material guide channel is provided outwards on the downward end of the grading drum on the grading frame, the lower end of the material guide channel is connected to the lower end of the grading drum; The outer wall of the grading drum is provided with a number of screening holes, which are divided into multiple levels along the length of the grading drum. The inner diameter of each level of screening hole gradually increases along the length of the grading drum. The inner wall of the grading drum is provided with a number of spiral lifting blades. A partition plate is provided between every two levels of screening holes in the grading frame. Each partition plate is provided with a rotating hole that is rotatably connected to the grading drum. The grading frame is divided into multiple screening slots corresponding to each level of screening hole by the partition plates. Each screening slot has an opening on one side, and the bottom of each screening slot is inclined downward toward its opening end.

[0007] By adopting the above technical solution, when the grading equipment of the granulator needs to be used, first connect the guide channel to the lower end of the granulator outlet. The material enters the grading drum through the guide channel and the feed hole in the middle of the circular support sleeve. Start the drive motor, which drives the grading drum to rotate, and at the same time, the spiral lifting blades inside the grading drum also rotate.

[0008] During the rotation of the classifying drum, the material gradually rises under the action of the spiral lifting blades. Because the screening holes on the outer wall of the classifying drum are divided into multiple stages along its length, and the inner diameter of each stage of the screening holes gradually increases, particles of different sizes will pass through the corresponding stage of screening holes during their ascent. Smaller particles will first fall through the smaller inner diameter screening holes and enter the corresponding screening tank; while larger particles will continue to rise until they pass through screening holes with sufficiently large inner diameters or are discharged from the strip-shaped discharge hole.

[0009] Particles entering the screening tank will slide down the bottom of the screening tank to the open end and be discharged, thus realizing the continuous grading and screening function of particulate materials.

[0010] The present invention is further configured such that the upper end of the material guiding channel is connected to a feeding hopper with an upper opening.

[0011] The present invention is further configured such that the screening hole closest to the drive motor is a strip-shaped material discharge hole.

[0012] The present invention is further configured such that a rotating ring is provided on the outer periphery of the grading rotating drum between every two screening holes, and is rotatably connected to the corresponding rotating hole.

[0013] The present invention is further configured such that a circular support sleeve is provided at the downward-facing end of the grading drum of the grading frame, and the lower end of the grading drum is in contact with and rotatably connected to the inner wall of the circular support sleeve, and a feed hole is provided in the middle of the circular support sleeve, which is connected to and communicates with the lower end of the material guide channel.

[0014] The present invention is further configured such that each of the grading racks has an outward discharge channel at the opening end of each screening tank, and each discharge channel is inclined along the inclination direction of the corresponding screening tank.

[0015] Compared with the prior art, the structural design of this utility model realizes the continuous grading and screening function of particulate materials. By the inclined setting of the grading drum and the cooperation of the spiral lifting blades, the material is screened step by step during the upward conveying process. Particles of different sizes enter the independent screening tank through the screening holes of the corresponding level, and are finally discharged through the discharge channel, which effectively improves the grading efficiency and accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 Used to display the vertical dividers and rotating holes inside the grading rack; Figure 3 This is a schematic diagram of the overall structure of the grading drum.

[0017] The components include: 1. Grading frame; 2. Grading drum; 3. Drive motor; 4. Circular support sleeve; 5. Material guide channel; 6. Feeding hopper; 7. Screening hole; 8. Strip-shaped discharge hole; 9. Spiral lifting blade; 10. Vertical partition plate; 11. Rotating hole; 12. Rotating ring; 13. Screening trough; and 14. Discharge channel. Detailed Implementation

[0018] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the grading device for a granulator according to this utility model. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model. The same or similar reference numerals in the drawings represent the same or similar parts.

[0019] Example, refer to Figure 1-3This paper introduces a grading device for a granulator. The device includes a grading frame 1, within which a grading drum 2, with one end tilted upwards, is rotatably connected. A drive motor 3 is mounted on the upward-facing end of the grading frame 1, and the output shaft of the drive motor 3 is connected to this upward-facing end of the grading drum 2. A circular support sleeve 4 is rotatably connected to the downward-facing end of the grading frame 1, with the lower end of the grading drum 2 contacting and rotatably connected to the inner wall of the circular support sleeve 4. A material guide channel 5 is provided outwards from the downward-facing end of the grading frame 1. A feed hole (not shown) is opened in the middle of the circular support sleeve 4, connecting and communicating with the lower end of the material guide channel 5. A feeding hopper 6 with an open top is connected to the upper end of the material guide channel 5.

[0020] The outer wall of the grading drum 2 has several screening holes 7, which are divided into four levels along the length of the grading drum 2. Along the length of the grading drum 2, the inner diameter of each screening hole 7 gradually increases. The screening hole 7 closest to the drive motor 3 is a strip-shaped discharge hole 8, which facilitates the discharge of large particles. The inner wall of the grading drum 2 is equipped with three spiral lifting blades 9. When the grading drum 2 rotates, it drives the spiral lifting blades 9 to rotate upwards, causing the particles inside to gradually rise and pass through each level of screening holes 7. Smaller particles fall out of the screening holes 7 one by one.

[0021] A vertical partition plate 10 is provided between every two screening holes 7 inside the grading frame 1. Each partition plate has a rotating hole 11 that is rotatably connected to the grading drum 2. A rotating ring 12 is provided around the outer periphery of the grading drum 2 between every two screening holes 7, and is rotatably connected to the corresponding rotating hole 11. The grading frame 1 is divided into four screening tanks 13 corresponding to each screening hole 7 by the partition plates. Each screening tank 13 has an opening on one side, and the bottom of each screening tank 13 is inclined downward towards its opening end. A discharge channel 14 is provided outward at the opening end of each screening tank 13, and each discharge channel 14 is inclined along the inclination direction of the corresponding screening tank 13.

[0022] Working principle: When the grading equipment of the granulator needs to be used, first align the feeding hopper 6 with the lower end of the granulator outlet. The material enters the grading drum 2 through the feeding hole in the middle of the guide channel 5 and the circular support sleeve 4. Start the drive motor 3, which drives the grading drum 2 to rotate. At the same time, the spiral lifting blades 9 inside the grading drum 2 also rotate.

[0023] During the rotation of the grading drum 2, the material gradually rises under the action of the spiral lifting blades 9. Since the screening holes 7 on the outer wall of the grading drum 2 are divided into four levels along the length, and the inner diameter of each level of screening holes 7 gradually increases, particles of different sizes will pass through the corresponding level of screening holes 7 during their ascent. Smaller particles will first fall through the smaller inner diameter screening holes 7 and enter the corresponding screening tank 13; while larger particles will continue to rise until they pass through a sufficiently large inner diameter screening hole 7 or are discharged from the strip-shaped discharge hole 8.

[0024] Particles entering the screening tank 13 slide down the bottom of the screening tank 13 towards the opening end, and are finally discharged from the equipment through the discharge channel 14. In this way, the continuous grading and screening function of particulate materials is realized.

[0025] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0026] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A grading device for a granulator, comprising a grading rack (1), characterized in that, The grading frame (1) is rotatably connected to a grading drum (2) with one end tilted upwards. A drive motor (3) is installed on the grading frame (1) at the upward end of the grading drum (2). The power output shaft of the drive motor (3) is connected to the upward end of the grading drum (2). A guide channel (5) is provided outward at the downward end of the grading frame (1). The lower end of the guide channel (5) is connected to the lower end of the grading drum (2). The outer wall of the grading drum (2) is provided with a number of screening holes (7). The screening holes (7) are divided into multiple levels along the length direction of the grading drum (2). The inner diameter of each level of screening hole (7) gradually increases along the length direction of the grading drum (2). The inner wall of the grading drum (2) is provided with a number of spiral lifting blades (9). A partition plate is provided between every two levels of screening holes (7) in the grading frame (1). Each partition plate is provided with a rotating hole (11) that is rotatably connected to the grading drum (2). The grading frame (1) is divided into multiple screening slots (13) corresponding to each level of screening hole (7) by the partition plate. Each screening slot (13) is open on one side, and the bottom of each screening slot (13) is inclined downward toward its opening end.

2. The grading device for a granulator according to claim 1, characterized in that, The upper end of the material guiding channel (5) is connected to a feeding hopper (6) with an upper opening.

3. The grading device for a granulator according to claim 1, characterized in that, The screening hole (7) closest to the drive motor (3) is a strip-shaped material discharge hole (8).

4. A grading device for a granulator according to claim 1, characterized in that, The outer periphery of the grading drum (2) is provided with a rotating ring (12) that is rotatably connected to the corresponding rotating hole (11) between every two screening holes (7).

5. A grading device for a granulator according to claim 1 or 4, characterized in that, The grading frame (1) is provided with a circular support sleeve (4) rotatably connected to the grading drum (2) at the lower end. The lower end of the grading drum (2) is in contact with and rotatably connected to the inner wall of the circular support sleeve (4). The middle part of the circular support sleeve (4) is provided with a feed hole that is connected to and communicates with the lower end of the guide channel (5).

6. A grading device for a granulator according to claim 1, characterized in that, The grading frame (1) has an outward discharge channel (14) at the opening end of each screening tank (13), and each discharge channel (14) is inclined along the inclination direction of the corresponding screening tank (13).

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