Double-stage granulator set dustproof sealed feeding device

By using alternating feeding from dual feeding hoppers and a closed hopper design, the problem of impurities mixing in caused by open hoppers is solved, achieving continuous feeding and improved product quality.

CN224545259UActive Publication Date: 2026-07-24NANJING HONGJIAYUAN MASCH TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NANJING HONGJIAYUAN MASCH TECH CO LTD
Filing Date
2025-05-09
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The existing two-stage granulator has an open hopper design, which makes it easy for external impurities to mix into the material, affecting the quality of the final product, such as black spots and uneven distribution of impurities during plastic granulation.

Method used

The design employs a dual-feeding box alternating feeding system, combined with a closed hopper, to ensure the continuity and airtightness of the feeding process and prevent impurities from entering the hopper.

Benefits of technology

It effectively prevents impurities from entering, ensuring the purity of subsequent processing steps and improving the quality and consistency of the final product.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to material processing technical field discloses dustproof sealed feeding device of double -step granulator unit, including main part assembly, including double -step granulator, the double -step granulator top is fixed with hopper, the double -step granulator bottom is fixed with base, feeding assembly, set up in double -step granulator, including feeding piece. The utility model has the beneficial effects that: adopt double feeding box from side alternation feeding in the feeding link, when one of feeding box carries out feeding operation, another is in the standby state, orderly switching of two, ensure the continuity of feeding process, and, after waiting for the feeding work all to complete, closed hopper can close immediately to form a relatively independent and sealed space, avoid all kinds of impurities mix into the hopper, guarantee the follow -up processing procedure not to be interfered with by impurity, effectively promote the quality of final product.
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Description

Technical Field

[0001] This utility model relates to the field of materials processing technology, and in particular to a dustproof and sealed feeding device for a two-stage granulation unit. Background Technology

[0002] Two-stage granulators are important granulation equipment widely used in many industries. They adopt twin-screw drives, making the transmission system safe, reliable, and easy to maintain. The extrusion system components are flexibly combined, and the main feeding system ensures uniform and stable material feeding. The top of the two-stage granulator is equipped with a hopper, allowing operators to manually pour various granular materials, such as plastic granules, rubber granules, or chemical raw material granules, into the hopper. This allows the granular materials to enter the two-stage granulator smoothly and orderly, initiating subsequent processing steps such as melting, mixing, and extrusion, laying the foundation for the final high-quality granular product. The hopper is mostly an open design. Because the hopper is open, various impurities from the external environment can easily fall into the hopper along with the material when it is poured in. These impurities will then mix in and enter subsequent processing steps, affecting the quality of the final product. In plastic granulation, this can lead to appearance and performance problems such as black spots and uneven impurity distribution in the granules. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] In view of the problems existing in the above and / or existing dustproof and sealed feeding devices of two-stage granulation units, this utility model is proposed.

[0005] Therefore, the problem that this utility model aims to solve is that most hoppers are designed to be open, and their open state makes it easy for external impurities to mix in when the material is poured in, which will enter the subsequent processing process and affect the quality of the final product. For example, in plastic granulation, it can cause problems such as black spots on the granules and uneven distribution of impurities.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a dustproof and sealed feeding device for a two-stage granulator, which includes a main component, including a two-stage granulator, wherein a hopper is fixed on the top of the two-stage granulator and a base is fixed on the bottom of the two-stage granulator;

[0007] A feeding assembly, mounted on the two-stage granulator, includes a feeding component, which includes a feeding box. The feeding box is mounted on the two-stage granulator. A movable plate is hinged inside the feeding box. A torsion spring is fixed to one side of the movable plate. One end of the torsion spring is fixed to the inner wall of the feeding box. A rotating rod is fixed to one side of the movable plate.

[0008] As a preferred embodiment of the dustproof and sealed feeding device for the two-stage granulator unit of this utility model, the feeding assembly further includes a movable component, the movable component including a sealing door, the sealing door being inserted into the top of the hopper, the sealing door and the hopper being movably connected, a drive rod being hinged to one side of the sealing door, and the drive rod being rotatably connected to one side of the hopper via a rotating shaft.

[0009] As a preferred embodiment of the dustproof and sealed feeding device for the two-stage granulator unit of this utility model, wherein: an extrusion plate is fixed on one side of the hopper, the extrusion plate is disposed on one side of the rotating rod, and a driven rod is fixed on one side of the driving rod.

[0010] As a preferred embodiment of the dustproof and sealed feeding device for the dual-stage granulator unit of this utility model, wherein: an extrusion column is provided on one side of the driven rod, and the extrusion column is fixed to one side of the feeding box.

[0011] As a preferred embodiment of the dustproof and sealed feeding device for the two-stage granulator unit of this utility model, the feeding assembly further includes an alternating component, the alternating component includes a first alternating plate, the first alternating plate is disposed on the top of the feeding box, and a second alternating plate is disposed on one side of the first alternating plate.

[0012] As a preferred embodiment of the dustproof and sealed feeding device for the two-stage granulator unit of this utility model, wherein: a movable plate is fixed at the bottom of the first alternating plate, a pulley is provided at the bottom of the movable plate, the movable plate and the pulley are rotatably connected by a rotating shaft, and a guide plate is provided at the bottom of the pulley.

[0013] As a preferred embodiment of the dustproof and sealed feeding device for the two-stage granulator unit of this utility model, the bottom of the first alternating plate is fixed with a movable column, a sliding plate is movably connected to the outside of the movable column, and a first support frame is provided at the bottom of the sliding plate.

[0014] As a preferred embodiment of the dustproof and sealed feeding device for the two-stage granulator unit of this utility model, a second support frame is provided at the bottom of the second alternating plate, a movable block is provided on one side of the second alternating plate, a threaded rod is inserted into one side of the movable block, and the movable block and the threaded rod are threadedly connected.

[0015] As a preferred embodiment of the dustproof and sealed feeding device for the two-stage granulator unit of this utility model, the feeding assembly further includes a connecting member, the connecting member including a first connecting plate, the first connecting plate being fixed to one side of the sliding plate, and a second connecting plate being fixed to one side of the second alternating plate.

[0016] As a preferred embodiment of the dustproof and sealed feeding device for the two-stage granulator unit of this utility model, the first connecting plate is fixed with a belt at its bottom, the belt is fixed to one side of the second connecting plate, a pulley is provided inside the belt, and the pulley is rotatably connected to one side of the second support frame through a rotating shaft.

[0017] The beneficial effects of this utility model are as follows: In the feeding process, a double feeding box is used to feed materials alternately from the side. When one feeding box is feeding, the other is in standby mode. The two are switched in an orderly manner to ensure the continuity of the feeding process. In addition, after the feeding work is completed, the closed hopper can be closed immediately, thereby forming a relatively independent and sealed space to prevent various impurities from entering the hopper, ensuring that the subsequent processing process is not affected by impurities, and effectively improving the quality of the final product. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is an overall structural diagram of the dustproof and sealed feeding device for a two-stage granulator unit.

[0020] Figure 2 This is a structural diagram of the feeding box of the dustproof and sealed feeding device for a two-stage granulator unit.

[0021] Figure 3 Dustproof and sealed feeding device for two-stage granulation unit Figure 2 Enlarged view of the structure at point A in the middle.

[0022] Figure 4 Dustproof and sealed feeding device for two-stage granulation unit Figure 2 Enlarged view of the structure at point B in the middle.

[0023] Figure 5 This is a structural diagram of the second alternating plate of the dustproof and sealed feeding device for a two-stage granulator.

[0024] Figure 6 Dustproof and sealed feeding device for two-stage granulation unit Figure 5Enlarged view of the structure at point C.

[0025] Figure 7 This is a structural diagram of the guide plate of the dustproof and sealed feeding device for a two-stage granulator.

[0026] Figure 8 This is a structural diagram of the closed door of the dustproof and sealed feeding device for a two-stage granulator unit.

[0027] Figure 9 This is a cross-sectional view of the feeding box of the dustproof and sealed feeding device for a two-stage granulator.

[0028] Figure 10 Dustproof and sealed feeding device for two-stage granulation unit Figure 9 Enlarged view of the structure at point D.

[0029] In the diagram: Main component 100; Feeding component 200; Two-stage granulator 101; Hopper 102; Base 103; Feeding part 201; Feeding box 201a; Moving plate 201b; Torsion spring 201c; Rotating rod 201d; Movable part 202; Closing door 202a; Drive rod 202b; Extrusion plate 202c; Driven rod 202d; Extrusion column 202e; Alternating part 203; First alternating plate 203a; Second alternating plate 203b; Movable plate 203c; Pulley 203d; Guide plate 203e; Movable column 203f; Sliding plate 203g; First support frame 203h; Second support frame 203i; Movable block 203j; Threaded rod 203k; Connector 204; First connecting plate 204a; Second connecting plate 204b; Belt 204c; Pulley 204d. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0033] Example 1

[0034] Reference Figures 1-10 This is the first embodiment of the present invention. This embodiment provides a dustproof and sealed feeding device for a two-stage granulator. The dustproof and sealed feeding device for the two-stage granulator includes a main component 100 and a feeding component 200. The two work together to ensure continuity by alternately feeding materials from the sides of the double feeding boxes during the feeding process. After feeding is completed, the closed hopper is closed to form a sealed space to isolate impurities and ensure subsequent processing and improve product quality.

[0035] The main component 100 includes a two-stage granulator 101, with a hopper 102 fixed to the top of the two-stage granulator 101 and a base 103 fixed to the bottom of the two-stage granulator 101.

[0036] The two-stage granulator 101 is used to process various materials and finally produce granular products. The two-stage granulator 101 is existing technology, so it will not be described in detail. The operator can pour granular materials into the hopper 102 and stably enter the two-stage granulator 101 to ensure a continuous and appropriate flow of material supply. The base 103 supports the weight of the entire two-stage granulator 101 to ensure that the equipment can be placed stably on the ground or a corresponding installation platform.

[0037] The feeding assembly 200 is mounted on the two-stage granulator 101 and includes a feeding component 201. The feeding component 201 includes a feeding box 201a, which is mounted on the two-stage granulator 101. A movable plate 201b is hinged inside the feeding box 201a. A torsion spring 201c is fixed to one side of the movable plate 201b. One end of the torsion spring 201c is fixed to the inner wall of the feeding box 201a. A rotating rod 201d is fixed to one side of the movable plate 201b.

[0038] There are two feeding boxes 201a, both installed on the two-stage granulator 101. Each feeding box 201a has a cover plate on top. When material needs to be added to the feeding box 201a, the cover plate is opened to pour in the material, and then the cover plate is closed. At this time, the material will fall onto the moving plate 201b. After the feeding box 201a is moved into the hopper 102, it will squeeze the rotating rod 201d to make it move. At this time, the movement of the rotating rod 201d can drive the moving plate 201b to tilt. When the moving plate 201b moves, it can apply a torsional force to the torsion spring 201c. After the moving plate 201b tilts, it can guide the material, which will then move into the hopper 102. After the feeding is completed, the feeding box 201a can return to its original position. At this time, the squeezing of the rotating rod 201d is released, and then the force of the rotation of the torsion spring 201c can drive the moving plate 201b to return to its original position for the next use.

[0039] Example 2

[0040] Reference Figures 2 to 10 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0041] Specifically, the feeding assembly 200 also includes a movable component 202, which includes a closing door 202a. The closing door 202a is inserted into the top of the hopper 102 and is movably connected to the hopper 102. A drive rod 202b is hinged to one side of the closing door 202a and is rotatably connected to one side of the hopper 102 through a rotating shaft.

[0042] The hopper 102 can be closed by setting the closing door 202a to prevent foreign objects from entering the hopper 102. Before the feeding box 201a is moved to the hopper 102, the drive rod 202b can be squeezed to make it rotate. At this time, the movement of the drive rod 202b can drive the closing door 202a to move and open.

[0043] A chute is provided on one side of the closed door 202a. A positioning block is fixed on the top of the hopper 102. The positioning block is slidably connected to the chute, and a spring is fixed on the inner wall of the chute. One end of the spring is fixed to the top of the positioning block. When the closed door 202a is opened, it can apply a pulling force to the spring. When the pressure on the drive rod 202b is released, the spring rebound force can drive the closed door 202a back to its original position and close it.

[0044] Specifically, an extrusion plate 202c is fixed on one side of the hopper 102, the extrusion plate 202c is located on one side of the rotating rod 201d, and a driven rod 202d is fixed on one side of the driving rod 202b.

[0045] When the feeding box 201a is moved into the hopper 102, the extrusion plate 202c can be used to extrude the rotating rod 201d to make it rotate, thereby tilting the moving plate 201b. By extruding the driven rod 202d to make it move, the driving rod 202b can be moved.

[0046] Specifically, an extrusion column 202e is provided on one side of the driven rod 202d, and the extrusion column 202e is fixed to one side of the feeding box 201a.

[0047] When the feeding box 201a is moved into the hopper 102, the extrusion column 202e can extrude the driven rod 202d to move it, thereby opening the closing door 202a.

[0048] Specifically, the feeding assembly 200 also includes an alternating component 203, which includes a first alternating plate 203a, which is disposed on the top of the feeding box 201a, and a second alternating plate 203b is disposed on one side of the first alternating plate 203a.

[0049] When it is necessary to alternate feeding materials, the alternating movement of the first alternating plate 203a and the second alternating plate 203b can drive the two feeding boxes 201a to alternately feed materials to the hopper 102.

[0050] Specifically, a movable plate 203c is fixed to the bottom of the first alternating plate 203a, and a pulley 203d is provided at the bottom of the movable plate 203c. The movable plate 203c and the pulley 203d are rotatably connected by a rotating shaft, and a guide plate 203e is provided at the bottom of the pulley 203d.

[0051] When the movable plate 203c moves, it can drive the first alternating plate 203a to move. The movement of the movable plate 203c can drive the pulley 203d to move on the guide plate 203e. The guide plate 203e can be set so that the movable plate 203c can move to the junction of the second alternating plate 203b and descend, so that the first alternating plate 203a can move to the bottom of the second alternating plate 203b. When it moves to the side of the hopper 102, it can raise the first alternating plate 203a, so that the first alternating plate 203a will not conflict with the second alternating plate 203b when it moves.

[0052] Specifically, a movable column 203f is fixed at the bottom of the first alternating plate 203a, and a sliding plate 203g is movably connected to the outside of the movable column 203f. A first support frame 203h is provided at the bottom of the sliding plate 203g.

[0053] When the first alternating plate 203a descends, it can drive the movable column 203f to move. The movement of the movable column 203f can support the first alternating plate 203a and prevent it from shifting. The sliding plate 203g can drive the first alternating plate 203a to move by moving. The sliding plate 203g and the first support frame 203h are slidably connected. The first support frame 203h can support the sliding plate 203g and prevent it from shifting when moving.

[0054] Example 3

[0055] Reference Figures 1-10 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0056] Specifically, a second support frame 203i is provided at the bottom of the second alternating plate 203b, a movable block 203j is provided on one side of the second alternating plate 203b, a threaded rod 203k is inserted into one side of the movable block 203j, and the movable block 203j and the threaded rod 203k are threadedly connected.

[0057] The second support frame 203i supports the second alternating plate 203b, preventing it from shifting. When the second alternating plate 203b needs to move, the threaded rod 203k can rotate. A motor is fixed at one end of the threaded rod 203k, and fixed blocks are set at both ends of the threaded rod 203k. The fixed blocks and the threaded rod 203k are rotatably connected by a rotating shaft. The fixed blocks are fixed to one side of the second support frame 203i. The fixed blocks support the threaded rod 203k. When the threaded rod 203k rotates, it can drive the movable block 203j to move. At this time, the movement of the movable block 203j can drive the second alternating plate 203b to move. When the second alternating plate 203b moves, it can drive the sliding plate 203g to move.

[0058] Specifically, the feeding assembly 200 also includes a connector 204, which includes a first connecting plate 204a, which is fixed to one side of the sliding plate 203g, and a second connecting plate 204b is fixed to one side of the second alternating plate 203b.

[0059] The movement of the first connecting plate 204a can drive the sliding plate 203g to move, and the movement of the second connecting plate 204b can drive the second alternating plate 203b to move.

[0060] Specifically, a belt 204c is fixed to the bottom of the first connecting plate 204a. The belt 204c is fixed to one side of the second connecting plate 204b. A pulley 204d is provided inside the belt 204c. The pulley 204d is rotatably connected to one side of the second support frame 203i through a rotating shaft.

[0061] There are two pulleys 204d, both of which are located inside the belt 204c. When the second alternating plate 203b moves, it can drive the second connecting plate 204b to move. At this time, the movement of the second connecting plate 204b can drive the belt 204c to move. When the belt 204c moves, it can drive the first connecting plate 204a to move. The movement of the first connecting plate 204a can drive the sliding plate 203g to move, thereby enabling the first alternating plate 203a to move. This allows for alternating feeding of materials into the hopper 102. The pulleys 204d can support the belt 204c and prevent it from shifting.

[0062] In use, open the top cover of the feeding box 201a, pour the material to be processed into the feeding box 201a, and then close the cover to prepare for subsequent feeding operations. After starting the motor connected to one end of the threaded rod 203k, the motor drives the threaded rod 203k to rotate. The rotation of the threaded rod 203k drives the movable block 203j to move. The movement of the movable block 203j drives the second alternating plate 203b to move, causing the second alternating plate 203b to change position, preparing for subsequent alternating feeding of the feeding box 201a. The movement of the second alternating plate 203b drives the belt 204c connected to it via the second connecting plate 204b to move. The belt 204c starts to rotate as the second alternating plate 203b moves. The belt 204c moves, causing the first connecting plate 204a connected to it to move. The movement of the first connecting plate 204a causes the sliding plate 203g to move. The movement of the sliding plate 203g causes the first alternating plate 203a to move. When the first alternating plate 203a moves, its bottom movable plate 203c drives the pulley 203d to move on the guide plate 203e. This allows the first alternating plate 203a to descend to the bottom of the second alternating plate 203b when it reaches the junction with the second alternating plate 203b, and to rise again when it moves to the side of the hopper 102, avoiding conflict with the second alternating plate 203b. With the alternating movement of the first alternating plate 203a and the second alternating plate 203b, the belt drives the first alternating plate 203a to move. The corresponding feeding box 201a moves alternately to the hopper 102. During the movement of the feeding box 201a, the extrusion column 202e on one side of it will extrude pressure on the driven rod 202d on one side of the hopper 102. The driven rod 202d moves and drives the drive rod 202b to rotate. The rotation of the drive rod 202b drives the closing door 202a to move and open. When it opens, the slide groove on the closing door 202a slides relative to the positioning block fixed at the top of the hopper 102, and the spring on the inner wall of the slide groove is pulled. At this time, the hopper 102 can be opened, and the feeding box 201a continues to move into the hopper 102. The extrusion plate 202c inside the hopper 102 will extrude pressure on the rotating rod 201d. The rotating rod 201d moves and drives the moving plate 202c to move. When the plate 201b is tilted, a torsional force is applied to the torsion spring 201c. After the plate 201b is tilted, the material is guided into the hopper 102, completing the feeding operation. After feeding is completed, the feeding box 201a is moved out of the hopper 102, releasing the pressure on the rotating rod 201d. The force of the torsion spring 201c rotating drives the moving plate 201b back to its original position. At the same time, the pressure on the drive rod 202b is released, and the force of the spring rebound drives the closing door 202a back to its original position and closes, preventing debris from entering the hopper 102. By alternating feeding from the two feeding boxes 201a, a continuous and stable material supply can be ensured for the two-stage granulator 101, enabling it to operate normally for material processing and ultimately produce granular products.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dustproof and sealed feeding device for a two-stage granulation unit, characterized in that: include, The main component (100) includes a two-stage granulator (101), with a hopper (102) fixed to the top of the two-stage granulator (101) and a base (103) fixed to the bottom of the two-stage granulator (101). A feeding assembly (200) is disposed on the two-stage granulator (101) and includes a feeding component (201). The feeding component (201) includes a feeding box (201a). The feeding box (201a) is disposed on the two-stage granulator (101). A movable plate (201b) is hinged inside the feeding box (201a). A torsion spring (201c) is fixed on one side of the movable plate (201b). One end of the torsion spring (201c) is fixed to the inner wall of the feeding box (201a). A rotating rod (201d) is fixed on one side of the movable plate (201b).

2. The dustproof and sealed feeding device for a two-stage granulator unit as described in claim 1, characterized in that: The feeding assembly (200) also includes a movable component (202), which includes a closing door (202a). The closing door (202a) is inserted into the top of the hopper (102) and is movably connected to the hopper (102). A drive rod (202b) is hinged to one side of the closing door (202a), and the drive rod (202b) is rotatably connected to one side of the hopper (102) through a rotating shaft.

3. The dustproof and sealed feeding device for a two-stage granulator unit as described in claim 2, characterized in that: An extrusion plate (202c) is fixed on one side of the hopper (102), the extrusion plate (202c) is disposed on one side of the rotating rod (201d), and a driven rod (202d) is fixed on one side of the driving rod (202b).

4. The dustproof and sealed feeding device for a two-stage granulator unit as described in claim 3, characterized in that: An extrusion column (202e) is provided on one side of the driven rod (202d), and the extrusion column (202e) is fixed to one side of the feeding box (201a).

5. The dustproof and sealed feeding device for a two-stage granulator unit as described in claim 4, characterized in that: The feeding assembly (200) further includes an alternating component (203), which includes a first alternating plate (203a), the first alternating plate (203a) being disposed on the top of the feeding box (201a), and a second alternating plate (203b) being disposed on one side of the first alternating plate (203a).

6. The dustproof and sealed feeding device for a two-stage granulator unit as described in claim 5, characterized in that: The bottom of the first alternating plate (203a) is fixed with a movable plate (203c), and the bottom of the movable plate (203c) is provided with a pulley (203d). The movable plate (203c) and the pulley (203d) are rotatably connected by a rotating shaft, and the bottom of the pulley (203d) is provided with a guide plate (203e).

7. The dustproof and sealed feeding device for a two-stage granulator unit as described in claim 6, characterized in that: The bottom of the first alternating plate (203a) is fixed with a movable column (203f), and a sliding plate (203g) is movably connected to the outside of the movable column (203f). The bottom of the sliding plate (203g) is provided with a first support frame (203h).

8. The dustproof and sealed feeding device for a two-stage granulator unit as described in claim 7, characterized in that: The second alternating plate (203b) is provided with a second support frame (203i) at its bottom. A movable block (203j) is provided on one side of the second alternating plate (203b). A threaded rod (203k) is inserted into one side of the movable block (203j). The movable block (203j) and the threaded rod (203k) are threadedly connected.

9. The dustproof and sealed feeding device for a two-stage granulator unit as described in claim 8, characterized in that: The feeding assembly (200) further includes a connector (204), which includes a first connecting plate (204a), the first connecting plate (204a) being fixed to one side of the sliding plate (203g), and a second connecting plate (204b) being fixed to one side of the second alternating plate (203b).

10. The dustproof and sealed feeding device for a two-stage granulator unit as described in claim 9, characterized in that: A belt (204c) is fixed to the bottom of the first connecting plate (204a). The belt (204c) is fixed to one side of the second connecting plate (204b). A pulley (204d) is provided inside the belt (204c). The pulley (204d) is rotatably connected to one side of the second support frame (203i) through a rotating shaft.