A multi-layered composite chip classifying screen

Abstract

This utility model relates to the technical field of chipping and screening equipment, and discloses a multi-layer composite chipping and grading screen, including a grading screen shell, an outer screen rotatably connected to the inner wall of the grading screen shell, a fine screen opening on the outer surface of the outer screen, a first thickness screening module set on the outer surface of the outer screen outside the fine screen opening, a second discharge port on the left end of the outer screen, a guide cylinder fixedly connected to the left end of the outer screen through a mounting plate, a first discharge port on the right end of the guide cylinder, an inner screen fixedly connected to the inner wall of the guide cylinder, a coarse screen opening on the outer surface of the inner screen, and a second thickness screening module set on the outer surface of the inner screen outside the coarse screen opening. This device achieves three-level size synchronous screening through the rotational transmission of the frustum-shaped screen, and combined with a screw-driven thickness adjustment module, forms a composite screening system of "size grading + thickness control".

Description

Technical Field

[0001] This utility model relates to the technical field of chipping and screening equipment, and more specifically, to a multi-layer composite chipping and grading screen. Background Technology

[0002] Multi-layer composite chipping and grading screens are key equipment used for material grading in industries such as wood processing and biomass energy. Through the combination design of multiple screens of different specifications, they can perform multi-stage grading of chipped materials according to parameters such as size and thickness, achieving separation of multiple specifications in one go, greatly improving grading efficiency. They are widely used in quality grading and material screening after chipping production, providing a precise material basis for subsequent processing.

[0003] However, traditional chipper grading screens have significant shortcomings. Most of these devices employ a single-stage sieving mode, with each sieving operation corresponding to only one screen size. When different sizes of chippers need to be sieved, multiple operations are required, a cumbersome process that severely impacts production efficiency. Furthermore, traditional equipment struggles to adapt to different chip thicknesses through adjustment, often necessitating the replacement of screens with the corresponding specifications. This necessitates the stockpiling of multiple screens, increasing equipment costs and failing to meet the demands of efficient and flexible production. Therefore, a multi-layer composite chipper grading screen is urgently needed to address these issues. Utility Model Content

[0004] (a) Technical problems to be solved In view of the above situation and to overcome the defects of the prior art, this utility model provides a multi-layer composite chipping and grading sieve, which aims to solve the problems in the background art.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a multi-layer composite chipping and grading sieve, comprising a grading sieve shell, a medium-sized discharge funnel fixedly connected to the left side of the grading sieve shell, a feed funnel fixedly connected to the upper surface of the medium-sized discharge funnel via a connecting rod, a small-sized discharge funnel disposed on the lower side of the grading sieve shell, a large-sized discharge funnel fixedly connected to the right side of the grading sieve shell via a connecting rod, and a motor disposed on the right side of the grading sieve shell below the large-sized discharge funnel, the output end of the motor being fixedly connected to a transmission... The outer wall of the grading screen is rotatably connected to an outer screen. The outer surface of the outer screen has fine screen holes. A first thickness screening module is set on the outer surface of the outer screen outside the fine screen holes. A second discharge port is set on the left end of the outer screen. A guide cylinder is fixedly connected to the left end of the outer screen through a mounting plate. A first discharge port is set on the right end of the guide cylinder. An inner screen is fixedly connected to the inner wall of the guide cylinder. The outer surface of the inner screen has coarse screen holes. A second thickness screening module is set on the outer surface of the inner screen outside the coarse screen holes.

[0006] The present invention is further configured such that the first thickness screening module includes an adjustment module housing, a fine-tuning movable plate is slidably connected to the inner side wall of the adjustment module housing, a screw is threadedly connected to the inner side wall of the adjustment module housing, a hexagonal locking block is provided at the upper end of the screw, a guide post is inserted into the inner side wall of the adjustment module housing, and a connecting post is fixedly connected to the upper end of the guide post.

[0007] The present invention is further configured such that the middle part of the screw is rotatably connected to the inner wall of the connecting post, the guide posts are provided in a plurality of rows evenly distributed in a ring array, the screw and the hexagonal locking block are provided in the middle of the plurality of guide posts, and the lower end of the screw is rotatably connected to the inner wall of the fine-tuning movable plate.

[0008] The present invention is further configured such that the lower end of the feeding funnel is located inside the left end of the inner screen, the right end of the medium-sized discharge funnel is adapted to the outer side of the left end of the outer screen, and the left end of the large-sized discharge funnel is adapted to the right end of the inner screen.

[0009] The present invention is further configured such that the transmission wheel is disposed inside the outer shell of the grading screen, and there are five transmission wheels arranged symmetrically. The transmission wheel in the middle of the right side is fixedly connected to the output shaft of the motor, and the outer surface of the transmission wheel is connected to the outer surfaces of both ends of the outer screen.

[0010] The present invention is further configured such that the second thickness screening module has the same structure as the first thickness screening module, and the size of the second thickness screening module is larger than that of the first thickness screening module.

[0011] The present invention is further configured such that the outer screen, the guide cylinder and the inner screen are all through-type frustum structures with different dimensions at both ends.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a multi-layer composite chipping and grading sieve, which has the following beneficial effects: 1. This multi-layer composite chipping and grading screen, through the arrangement of an outer screen, a guide cylinder, and an inner screen, enables the multi-layer composite chipping and grading screen to facilitate the improvement of chipping screening efficiency. Through the coordinated arrangement of the motor, transmission wheel, and outer screen, the outer screen, guide cylinder, and inner screen can be driven to rotate during use. Thus, after the chipping enters the device, it can be directly screened twice to be separated into three grades, thereby greatly improving the chipping screening efficiency.

[0013] 2. This multi-layer composite chipping and grading screen, through the setting of a first thickness screening module and a second thickness screening module, enables precise control of the thickness of chippers of corresponding grades. Through the coordinated arrangement of the adjustment module housing, fine-tuning movable plate, screw, hexagonal locking block, guide column, and connecting column, during use, the screw can be rotated by the hexagonal locking block, causing the fine-tuning movable plate to slide inside the adjustment module housing. This adjusts the opening thickness on the outer side of the adjustment module housing, ensuring that the passing chippers meet the set thickness grade. No additional screen is required; only the position of the fine-tuning movable plate within the adjustment module housing needs to be adjusted to screen chippers of different thickness grades, saving equipment costs and reducing the space occupied by additional equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the front cross-section of the present invention; Figure 4 This is a schematic diagram of the three-dimensional cross-section of the outer shell of the grading screen of this utility model; Figure 5 This is a three-dimensional structural diagram of the outer screen of this utility model; Figure 6 This is a schematic diagram of the second three-dimensional structure of the outer screen of this utility model; Figure 7 This is a three-dimensional structural diagram of the guide cylinder of this utility model; Figure 8 This is a three-dimensional structural diagram of the inner screen of this utility model; Figure 9 This utility model Figure 6A schematic diagram of the structure at point A in the middle.

[0015] In the diagram: 1. Grading screen outer shell; 2. Medium-sized discharge hopper; 3. Feed hopper; 4. Small-sized discharge hopper; 5. Large-sized discharge hopper; 6. Motor; 7. Drive wheel; 8. Outer screen; 9. Fine screen mesh; 10. Adjustment module outer shell; 11. Fine-tuning movable plate; 12. Screw; 13. Hexagonal locking block; 14. Guide column; 15. Connecting column; 16. Second discharge port; 17. Guide cylinder; 18. Mounting plate; 19. First discharge port; 20. Inner screen; 21. Coarse screen mesh; 22. Second thickness screening module. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0019] Please see Figures 1-9A multi-layer composite chipping and grading sieve includes a grading sieve shell 1. A medium-sized discharge funnel 2 is fixedly connected to the left side of the grading sieve shell 1. A feed funnel 3 is fixedly connected to the upper surface of the medium-sized discharge funnel 2 via a connecting rod. The lower end of the feed funnel 3 is located inside the left end of the inner screen 20. The right end of the medium-sized discharge funnel 2 is adapted to the outer side of the left end of the outer screen 8. The left end of the large-sized discharge funnel 5 is adapted to the right end of the inner screen 20. A small-sized discharge funnel 4 is located on the lower side of the grading sieve shell 1. A large-sized discharge funnel 5 is fixedly connected to the right side of the grading sieve shell 1 via a connecting rod. A motor 6 is located on the right side of the grading sieve shell 1 below the large-sized discharge funnel 5. A transmission wheel 7 is fixedly connected to the output end of the motor 6. The transmission wheel 7 is located on... Inside the outer shell 1 of the grading screen, five drive wheels 7 are arranged symmetrically. The drive wheel 7 in the middle of the right side is fixedly connected to the output shaft of the motor 6. The outer surface of the drive wheel 7 is connected to the outer surfaces of both ends of the outer screen 8. The outer screen 8 is rotatably connected to the inner wall of the outer shell 1. The outer surface of the outer screen 8 has fine screen holes 9. The left end of the outer screen 8 has a second discharge port 16. The left end of the outer screen 8 is fixedly connected to the guide cylinder 17 through the mounting plate 18. The right end of the guide cylinder 17 has a first discharge port 19. The inner wall of the guide cylinder 17 is fixedly connected to the inner screen 20. The outer surface of the inner screen 20 has coarse screen holes 21. The outer screen 8, the guide cylinder 17 and the inner screen 20 are all through-type frustum structures with different sizes at both ends.

[0020] Specifically, the outer screen 8, guide cylinder 17, and inner screen 20 inside the grading screen shell 1 are all through-type frustum structures with different sizes at both ends. The inner screen 20 has coarse screen holes 21 on its surface, and the outer screen 8 has fine screen holes 9 on its surface. The motor 6 drives the outer screen 8 to rotate through the transmission wheel 7, which in turn drives the guide cylinder 17 and the inner screen 20 to rotate synchronously. The lower end of the feed funnel 3 is connected to the left end of the inner screen 20, the large-sized discharge funnel 5 is connected to the right end of the inner screen 20, the medium-sized discharge funnel 2 is adapted to the left end of the outer screen 8, and the small-sized discharge funnel 4 is located below the outer screen 8. The chipped material enters from the feed funnel 3. The inner screen 20 is rotated and moves towards the larger end as the truncated cone structure rotates: chippers larger than the coarse screen mesh 21 are discharged from the right end of the inner screen 20 and collected and discharged through the large-sized discharge funnel 5; chippers smaller than the coarse screen mesh 21 fall into the guide cylinder 17 and move with the guide cylinder 17 to the outer screen 8. When the outer screen 8 rotates, chippers smaller than the fine screen mesh 9 pass through the mesh and fall into the small-sized discharge funnel 4; the remaining chippers are discharged from the second discharge port 16 at the left end of the outer screen 8 and collected through the medium-sized discharge funnel 2. The three-stage screening is completed simultaneously, with high processing efficiency, which is an effective improvement over the traditional single-stage screening.

[0021] Please see Figures 1-9An outer screen 8 is rotatably connected to the inner wall of the grading screen housing 1. Fine screen holes 9 are opened on the outer surface of the outer screen 8. A first thickness screening module is arranged on the outer surface of the outer screen 8 outside the fine screen holes 9. The first thickness screening module includes an adjustment module housing 10. A fine-tuning movable plate 11 is slidably connected to the inner wall of the adjustment module housing 10. A screw 12 is threadedly connected to the inner wall of the adjustment module housing 10. A hexagonal locking block 13 is provided at the upper end of the screw 12. A guide post 14 is inserted into the inner wall of the adjustment module housing 10. A connecting post 15 is fixedly connected to the upper end of the guide post 14. The middle part of the screw 12 is connected to the connecting post 15. The inner wall is rotatably connected, and several guide columns 14 are evenly distributed in a ring array in multiple rows. The screw 12 and hexagonal locking block 13 are located in the middle of several guide columns 14. The lower end of the screw 12 is rotatably connected to the inner wall of the fine-tuning movable plate 11. The inner wall of the guide cylinder 17 is fixedly connected to an inner screen 20. The outer surface of the inner screen 20 is provided with a coarse screen hole 21. The outer surface of the inner screen 20 is located outside the coarse screen hole 21 and a second thickness screening module 22 is provided. The second thickness screening module 22 has the same structure as the first thickness screening module, but the size of the second thickness screening module 22 is larger than that of the first thickness screening module.

[0022] Specifically, the first thickness screening module and the second thickness screening module 22 have the same structure, both consisting of an adjustment module housing 10, a fine-tuning movable plate 11, a screw 12, and a guide column 14. The hexagonal locking block 13 at the upper end of the screw 12 can drive the fine-tuning movable plate 11 to slide along the guide column 14, adjusting the gap with the screen surface. The second thickness screening module 22 is larger than the first module. Rotating the hexagonal locking block 13 causes the screw 12 to rotate, and the fine-tuning movable plate 11 slides up and down along the guide column 14, changing the gap width with the screen surface. The second thickness screening module 22 adjusts the thickness threshold at the outlet of the inner screen 20, and the first thickness screening module adjusts the thickness threshold at the outlet of the outer screen 8. When the chip passes through the gap, those exceeding the thickness threshold are intercepted, while those meeting the requirements are discharged with the rotation of the screen. This structure eliminates the need to replace the screen, and thickness control is achieved through fine-tuning of the screw 12, adapting to the grading requirements of different material chips and reducing equipment costs.

[0023] In summary, when using the entire equipment: after powering on the device, the chips to be screened are poured into the inside of the feed hopper 3, entering the inner screen 20 from one end of the feed hopper 3. The motor 6 drives the transmission wheel 7 to rotate, which in turn drives the outer screen 8 to rotate. This causes the internal structure of the grading screen shell 1 to rotate along with the outer screen 8. Since the outer screen 8, guide cylinder 17, and inner screen 20 are all through-type frustum structures with different sizes at both ends, when the chips enter their interiors, they will move towards the end with the larger inner diameter. During this movement, chips smaller than the size of the coarse screen mesh 21 are discharged from the coarse screen mesh 21, while larger chips are discharged from the right end of the inner screen 20. After being guided by the large-size discharge hopper 5, they fall down for the first screening. The chips after the first screening fall into the guide cylinder 17, move to the right, and fall from the first discharge port 19. Similarly, at the right end inside the outer screen 8, the chippers will be screened again through the fine screen holes 9 on the outer screen 8. The smaller chippers will pass through the fine screen holes 9 and be discharged through the small discharge funnel 4. The other chippers will be discharged through the second discharge port 16 at the left end of the outer screen 8 and through the medium-sized discharge funnel 2. During both screenings, the corresponding hexagonal blocks 13 can be locked with bolts, and the screw 12 can be rotated. At this time, the screw 12 and the connecting column 15 rotate relative to each other. The lower end of the screw 12 is connected to the inner wall of the adjustment module housing 10, thereby driving the fine adjustment movable plate 11 to move up and down inside the adjustment module housing 10. This allows for the adjustment of the gap between the fine adjustment movable plate 11 and the outer surface of the outer screen 8, as well as between the fine adjustment movable plate 11 and the outer surface of the inner screen 20, thus achieving the effect of screening chippers of different thicknesses.

[0024] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-deck combined chip classifying screen comprising a classifying screen housing (1), characterized in that: A medium-sized discharge funnel (2) is fixedly connected to the left side of the grading screen shell (1). A feed funnel (3) is fixedly connected to the upper surface of the medium-sized discharge funnel (2) via a connecting rod. A small-sized discharge funnel (4) is provided on the lower side of the grading screen shell (1). A large-sized discharge funnel (5) is fixedly connected to the right side of the grading screen shell (1) via a connecting rod. A motor (6) is provided on the right side of the grading screen shell (1) below the large-sized discharge funnel (5). A transmission wheel (7) is fixedly connected to the output end of the motor (6). An outer screen (8) is rotatably connected to the inner wall of the grading screen shell (1). The outer surface of the outer screen (8) The outer screen (8) has fine screen holes (9). A first thickness screening module is provided on the outer surface of the outer screen (8) outside the fine screen holes (9). A second discharge port (16) is provided on the left end of the outer screen (8). A guide cylinder (17) is fixedly connected to the left end of the outer screen (8) through a mounting plate (18). A first discharge port (19) is provided on the right end of the guide cylinder (17). An inner screen (20) is fixedly connected to the inner side wall of the guide cylinder (17). A coarse screen hole (21) is provided on the outer surface of the inner screen (20). A second thickness screening module (22) is provided on the outer surface of the inner screen (20) outside the coarse screen hole (21).

2. A multi-deck combined chip sorter according to claim 1, characterized in that: The first thickness screening module includes an adjustment module housing (10), a fine-tuning movable plate (11) is slidably connected to the inner side wall of the adjustment module housing (10), a screw (12) is threadedly connected to the inner side wall of the adjustment module housing (10), a hexagonal locking block (13) is provided at the upper end of the screw (12), a guide post (14) is inserted into the inner side wall of the adjustment module housing (10), and a connecting post (15) is fixedly connected to the upper end of the guide post (14).

3. A multi-deck combined chip sorter according to claim 2, wherein: The middle part of the screw (12) is rotatably connected to the inner wall of the connecting post (15). Several guide posts (14) are provided and evenly distributed in a ring array in multiple rows. The screw (12) and the hexagonal locking block (13) are located in the middle of several guide posts (14). The lower end of the screw (12) is rotatably connected to the inner wall of the fine-tuning movable plate (11).

4. A multi-deck composite chip sorter according to claim 1 wherein: The lower end of the feed hopper (3) is located inside the left end of the inner screen (20), the right end of the medium-sized discharge hopper (2) is adapted to the outer side of the left end of the outer screen (8), and the left end of the large-sized discharge hopper (5) is adapted to the right end of the inner screen (20).

5. A multi-deck composite chip sorter according to claim 1 wherein: The transmission wheel (7) is located inside the outer shell (1) of the grading screen. There are five transmission wheels (7) arranged symmetrically. The transmission wheel (7) in the middle of the right side is fixedly connected to the output shaft of the motor (6). The outer surface of the transmission wheel (7) is connected to the outer surfaces of both ends of the outer screen (8).

6. A multi-deck composite chip sorter according to claim 1 or 2, wherein: The second thickness screening module (22) has the same structure as the first thickness screening module, but the size of the second thickness screening module (22) is larger than that of the first thickness screening module.

7. A multi-deck composite chip sorter according to claim 1 wherein: The outer screen (8), the guide cylinder (17) and the inner screen (20) are all through circular cone structures with different sizes at two ends.

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