A three-layer full-automatic color sorter that is easy for multiple selection and its sorting method

Abstract

The present invention discloses a three-layer full-automatic color sorter that is easy for multi-selection and multi-classification and its sorting method, including: a frame, the lower surface of the frame is connected with legs through threaded parts; a feeding assembly, arranged at one end of the upper surface of the frame; a sorting assembly, arranged at the other end of the upper surface of the frame, and a conveyor belt for conveying materials is arranged between the sorting assembly and the conveyor belt, and the conveyor belt is arranged in three places along the height direction of the frame; wherein, the sorting assembly is evenly distributed in three places along the height direction of the frame; the present invention is provided with a frame, a feeding assembly, a sorting assembly, a transfer assembly A, a transfer assembly B and a transfer assembly C, which is convenient for multi-stage fine selection and multi-classification processing of materials according to actual needs. The camera refraction light path and the internal space layout of the upper and lower sorting boxes in the sorting area minimize the height between each layer. There are multiple outlets, which buffer and slow down the materials, reducing the breakage of materials caused by a large speed.

Description

Technical Field

[0001] The present invention specifically relates to a three - layer full - automatic color sorter that is easy for multi - sorting and multi - selection and its sorting method. Background Art

[0002] The crawler - type color sorter is a device that relies on a fast horizontal conveyor to stably and uniformly throw the sorted materials. The camera captures the images of the materials at the position where the materials are thrown out and separated from the conveyor rollers, and then realizes the removal and separation of the materials, achieving the goal of sorting different varieties of materials by the machine. Currently, only single - layer crawler - type color sorters and double - layer crawler - type color sorters are available in the market, which can achieve one - time removal or two - time re - selection and removal of materials, and divide the raw materials into two categories or three categories.

[0003] To improve the diversity of sorted materials in the existing technology, multiple machines are connected online to achieve multiple sorting of a raw material. The materials are repeatedly connected in series for re - feeding to sort out multiple types of products. Such online connection occupies a large site area for customers, and also requires more lifting and re - selection and re - feeding equipment. The use cost is high, and the economic efficiency is low. Moreover, the multiple re - feeding and turnover times will also cause damage to the surface of the materials, and it is impossible to well meet the requirement of sorting out multiple types of products on a single device. Therefore, we propose a three - layer full - automatic color sorter that is easy for multi - sorting and multi - selection and its sorting method. Summary of the Invention

[0004] The purpose of the present invention is to provide a three - layer full - automatic color sorter that is easy for multi - sorting and multi - selection and its sorting method to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A three - layer full - automatic color sorter that is easy for multi - sorting and multi - selection, including:

[0006] A frame, the lower surface of the frame is connected with legs through threaded parts;

[0007] A feeding component, arranged at one end of the upper surface of the frame;

[0008] A sorting component, arranged at the other end of the upper surface of the frame, and a conveyor belt for conveying materials is arranged between the sorting component and the conveyor belt, and the conveyor belt is arranged in three places along the height direction of the frame;

[0009] Among them, the sorting components are evenly distributed in three places along the height direction of the frame, and every two adjacent sorting components are staggered from each other. Below the three sorting components from high to low, there are respectively connected with corresponding transfer components A, B, and C for separately discharging the finished products and defective products.

[0010] Preferably, the inner side of the sorting component includes an upper-view camera, a reflector, a background plate, a blowing nozzle, a lower-view camera and a lamp body. The upper-view camera is arranged at the upper end inside the sorting component to identify the upper surface of the material. The reflector is arranged side by side with the upper-view camera. The blowing nozzle is arranged in the middle inside the sorting component to blow the material to move during sorting. There is a lamp body between the blowing nozzle and the reflector to illuminate the material. A background plate is arranged above the lamp body. The lower-view camera is arranged at the lower end inside the sorting component to identify the lower surface of the material.

[0011] Preferably, there are four lamp bodies, and every two lamp bodies are respectively arranged on both sides of the blowing nozzle.

[0012] Preferably, the reflector is of an inclined structure, and there are two reflectors to respectively reflect the material into the upper-view camera and the lower-view camera.

[0013] Preferably, at both ends of one side wall of the transfer component A, there are good-product outlets A, and in the middle of one side wall, there is a defective-product outlet A. Inside the transfer component A, there is a partition plate to separate its internal space into a first blanking area and a second blanking area. The good-product outlet A is communicated with the first blanking area, and the defective-product outlet A is communicated with the second blanking area.

[0014] Preferably, on one side wall of the inner surface of the first blanking area, there is a fixed inclined material guiding plate to respectively guide the defective materials into the inner sides of the good-product outlets A at both ends. The cross section of the material guiding plate is trapezoidal. On the other side wall of the inner surface of the first blanking area, there is a rotatably connected flow regulating plate for adjusting the blanking flow rate.

[0015] Preferably, the transfer component B includes a first good-product outlet B, a second good-product outlet B and a defective-product outlet B. The first good-product outlet B is arranged at both ends of one side wall of the transfer component B. The second good-product outlet B is arranged in the middle of one side wall of the transfer component B. The inner sides of the first good-product outlet B and the second good-product outlet B are not communicated with each other. The defective-product outlet B is arranged on the other side wall of the transfer component B, and there are three defective-product outlets B that are evenly distributed along the long side of the transfer component B and their inner sides are not communicated with each other.

[0016] Preferably, the transfer component C includes a first good-product outlet C, a second good-product outlet C, a first defective-product outlet C and a second defective-product outlet C. The first good-product outlet C is arranged at both ends of one side wall of the transfer component C. The second good-product outlet C is arranged side by side with the first good-product outlet C and their inner sides are not communicated with each other. The second defective-product outlet C is arranged at both ends of the other side wall of the transfer component C. The first defective-product outlet C is arranged in the middle of the other side wall of the transfer component C.

[0017] Preferably, the feeding assembly includes a feed hopper, a feed chamber, a first vibrator and a bracket. The bracket is fixed on the upper surface of the frame. A feed hopper for storing materials is arranged on the bracket. A feed chamber is formed in the feed hopper, and a first vibrator is provided inside the feed hopper.

[0018] A sorting method for a three-layer full-automatic color sorter that is easy to perform multiple selections and multi-selections includes the following steps:

[0019] Step A: The feeding assembly vibrates and feeds the materials to flow onto the conveyor belt of the first layer. The conveyor belt of the first layer conveys the materials to the inside of the sorting assembly. The materials are illuminated by the lamp body. The upper-view camera and the lower-view camera identify different surfaces of the materials. After identifying the finished products DE and the defective products FG, the finished products DE and the defective products FG are blown and separated by the blowing nozzle.

[0020] Step B: The finished products DE and the defective products FG separated by the sorting assembly at the highest position fall into the inside of the transfer assembly A. The finished products are respectively guided into the two good product outlets A through the guide plate. The two good product outlets A discharge the finished products DE, and the defective product outlet A discharges the defective products FG. When discharging, loosen the locking bolts of the flow regulating plate, adjust the inclination of the flow regulating plate to adjust the discharge flow rate. After discharging, it flows through the conveyor belt of the second layer to the sorting assembly in the middle layer.

[0021] Step C: The sorting assembly in the middle layer separates the finished product DE into finished product D and defective product E, and separates the defective product FG into finished product F and defective product G, which fall into the inside of the transfer assembly B. The finished product D and the finished product F are discharged through the first good product outlet B and the second good product outlet B respectively, and the defective product outlet B discharges the defective products E and defective products G. It flows through the conveyor belt for the third time to the sorting assembly at the lowest position.

[0022] Step D: The sorting assembly at the lowest position sorts and purifies the defective products E and defective products G and flows into the inside of the transfer assembly C. The good products and defective products flow out through the first good product outlet C, the second good product outlet C, the first defective product outlet C and the second defective product outlet C opened by the transfer assembly C. After flowing out, the defective products return to the inside of the feeding assembly and can be sorted again.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The present invention facilitates multi-level selection and multi-classification processing of materials according to actual needs by providing a machine frame, a feeding component, a sorting component, a transfer component A, a transfer component B, and a transfer component C. The camera refraction light path and the internal space layout of the upper and lower sorting boxes in the sorting area minimize the height between each layer, achieving a compact device structure that is convenient for transportation, installation, and maintenance. The structural design for sorting and removing good and defective products ensures the stability, uniformity, and consistency of the material flow between the upper and lower layers, laying a foundation for the stable to relatively static state of the backend materials on the horizontal conveyor belt. The transfer component A, transfer component B, and transfer component C with multiple outlets buffer and reduce the speed of the materials, reducing material breakage caused by excessive speed and inconsistent paving thickness, thereby reducing inaccurate camera recognition caused by material stacking on the lower conveyor belt and improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a structural schematic diagram of the present invention;

[0026] Figure 2 is a structural schematic diagram of the transfer component A of the present invention;

[0027] Figure 3 is a structural schematic diagram of the sorting component of the present invention;

[0028] Figure 4 is a structural schematic diagram of the good product outlet A of the present invention;

[0029] Figure 5 is a structural schematic diagram of the guide plate of the present invention;

[0030] Figure 6 is a structural schematic diagram of the flow regulating plate of the present invention;

[0031] Figure 7 is a structural schematic diagram of the transfer component B of the present invention;

[0032] Figure 8 is a structural schematic diagram of the defective product outlet B of the present invention;

[0033] Figure 9 is a structural schematic diagram of the transfer component C of the present invention;

[0034] Figure 10 is a structural schematic diagram of the second defective product outlet C of the present invention;

[0035] Figure 11 is a structural schematic diagram of the feed hopper of the present invention;

[0036] Figure 12 is a structural schematic diagram of the feeding trough of the present invention.

[0037] In the figure: 1, frame; 2, feeding component; 21, feeding hopper; 22, feeding chamber; 23, first vibrator; 24, support; 3, conveyor belt; 4, sorting component; 5, transfer component A; 51, good product outlet A; 52, defective product outlet A; 53, partition board; 55, guiding plate; 56, flow regulating plate; 6, support leg; 7, transfer component B; 71, first good product outlet B; 72, second good product outlet B; 73, defective product outlet B; 8, transfer component C; 81, first good product outlet C; 82, second good product outlet C; 83, first defective product outlet C; 84, second defective product outlet C; 9, upper viewing camera; 10, reflector; 11, background board; 12, blowing nozzle; 14, lower viewing camera; 15, lamp body; 161, moving frame; 162, feeding trough; 163, transition board. Detailed implementation mode

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1

[0040] Please refer to Figures 1 - 11 , the present invention provides a technical solution: a three-layer full-automatic color sorter that is easy to perform multiple selections, including:

[0041] Frame 1, the lower surface of the frame 1 is connected with a support leg 6 through a threaded part;

[0042] Feeding component 2, arranged at one end of the upper surface of the frame 1, facilitating the uniform distribution of materials onto the conveyor belt 3 during sorting;

[0043] Sorting component 4, arranged at the other end of the upper surface of the frame 1, and a conveyor belt 3 for conveying materials is arranged between the sorting component 4 and the conveyor belt 3, and the conveyor belt 3 is arranged in three places along the height direction of the frame 1, facilitating the sorting of materials;

[0044] Among them, the sorting components 4 are evenly distributed in three places along the height direction of the frame 1, and every two adjacent sorting components 4 are staggered from each other, facilitating the better passage of materials through multiple sorting components 4 for sorting in sequence. Below the three sorting components 4 from high to low are respectively connected with a transfer component A5, a transfer component B7, and a transfer component C8 corresponding to them for separately discharging the finished product materials and defective product materials, facilitating the separation and discharging of the finished products and defective products during and after sorting.

[0045] Preferably, the inner side of the sorting component 4 includes an upper-view camera 9, a reflector 10, a background plate 11, a blowing nozzle 12, a lower-view camera 14 and a lamp body 15. The upper-view camera 9 is arranged at the upper end inside the sorting component 4 to identify the upper surface of the material. The reflector 10 is arranged side by side with the upper-view camera 9 to facilitate reflecting the material to the upper-view camera 9. By using the reflector 10, the overall height of the equipment can be reduced, the space occupied by the equipment can be minimized, and at the same time, the storey height can be reduced to prevent the material from falling too fast due to a large height difference, resulting in large collision and skin breakage damage. The blowing nozzle 12 is arranged in the middle inside the sorting component 4 to blow the material to move during sorting. There is a lamp body 15 for illuminating the material between the blowing nozzle 12 and the reflector 10. A background plate 11 is arranged above the lamp body 15. The lower-view camera 14 is arranged at the lower end inside the sorting component 4 to identify the lower surface of the material, which is convenient for separately photographing and identifying the upper and lower surfaces of the material, thereby improving the accuracy of sorting.

[0046] Preferably, there are four lamp bodies 15, and every two lamp bodies 15 are respectively arranged on both sides of the blowing nozzle 12 to facilitate a better lighting effect.

[0047] Preferably, the reflector 10 has an inclined structure. There are two reflectors 10 to respectively reflect the material into the upper-view camera 9 and the lower-view camera 14 to facilitate better photographing and identification.

[0048] Preferably, good-product outlets A51 are opened at both ends of one side wall of the transfer component A5, and a defective-product outlet A52 is opened in the middle of one side wall. A partition plate 53 is arranged inside the transfer component A5 to divide its internal space into a first material discharge area and a second material discharge area. The good-product outlet A51 is communicated with the first material discharge area, and the defective-product outlet A52 is communicated with the second material discharge area to facilitate separate material discharge and avoid uneven thickness caused by material stacking.

[0049] Preferably, an inclined guide plate 55 is fixed to one side wall of the inner surface of the first material discharge area to respectively guide the defective materials into the inner sides of the good-product outlets A51 at both ends. The cross section of the guide plate 55 is trapezoidal. A flow regulating plate 56 for adjusting the material discharge flow is rotatably connected to the other side wall of the inner surface of the first material discharge area to facilitate reducing the speed and flow of the material to avoid collision caused by too high material speed and uneven thickness caused by too much material, which may affect later camera identification.

[0050] Preferably, the transfer component B7 includes a first good product outlet B71, a second good product outlet B72 and a defective product outlet B73. The first good product outlet B71 is arranged at both ends of one side wall of the transfer component B7, the second good product outlet B72 is arranged in the middle of one side wall of the transfer component B7, and the inner sides of the first good product outlet B71 and the second good product outlet B72 are not connected to each other. The defective product outlet B73 is arranged on the other side wall of the transfer component B7, and there are three places where the defective product outlets B73 are evenly distributed along the long side of the transfer component B7 and the inner sides are not connected to each other, which is convenient for better discharging different sorted materials.

[0051] Preferably, the transfer component C8 includes a first good product outlet C81, a second good product outlet C82, a first defective product outlet C83 and a second defective product outlet C84. The first good product outlet C81 is arranged at both ends of one side wall of the transfer component C8, the second good product outlet C82 is arranged side by side with the first good product outlet C81 and the inner sides of the two are not connected to each other. The second defective product outlet C84 is arranged at both ends of the other side wall of the transfer component C8, and the first defective product outlet C83 is arranged in the middle of the other side wall of the transfer component C8, which is convenient for making the distribution of good products and defective products uniform and better discharging materials.

[0052] Preferably, the feeding component 2 includes a feeding hopper 21, a feeding chamber 22, a first vibrator 23 and a bracket 24. The bracket 24 is fixed on the upper surface of the frame 1. The feeding hopper 21 for storing materials is arranged on the bracket 24. The feeding chamber 22 is opened on the feeding hopper 21, and the first vibrator 23 is arranged inside the feeding hopper 21, which is convenient for feeding small-volume materials through the feeding hopper 21 with a small opening on the upper surface.

[0053] A sorting method for a three-layer full-automatic color sorter that is easy for multi-sorting and multi-selection includes the following steps:

[0054] Step A: The material is vibrated and fed through the feeding component 2 and flows to the conveyor belt 3 on the first layer. The conveyor belt 3 on the first layer conveys the material to the inside of the sorting component 4. The material is illuminated by the lamp body 15, and the upper vision camera 9 and the lower vision camera 14 identify different surfaces of the material. After identifying the finished products DE and the defective products FG, the finished products DE and the defective products FG are blown and separated by the air nozzle 12;

[0055] Step B: The finished products DE and the defective products FG separated by the sorting component 4 at the highest position fall into the inside of the transfer component A5. The finished product materials are respectively introduced into the two good product outlets A51 through the guide plate 55. The two good product outlets A51 discharge the finished products DE, and the defective product outlet A52 discharges the defective products FG. When discharging, loosen the locking bolts of the flow regulating plate 56, adjust the inclination degree of the flow regulating plate 56 to adjust the discharging flow rate, and after discharging, it flows to the sorting component 4 in the middle layer through the conveyor belt 3 on the second layer;

[0056] Step C: The sorting component 4 in the middle layer sorts the finished products DE into finished product D and defective product E, and sorts the defective products FG into finished product F and defective product G, which fall inside the transfer component B7. The finished product D and the finished product F are discharged through the first qualified product outlet B71 and the second qualified product outlet B72 respectively, and the defective products E and G are discharged through the defective product outlet B73, and flow to the sorting component 4 at the lowest part through the third conveyor belt 3;

[0057] Step D: The sorting component 4 at the lowest part sorts and purifies the defective products E and G and flows them to the inside of the transfer component C8. The qualified products and defective products flow out through the first qualified product outlet C81, the second qualified product outlet C82, the first defective product outlet C83 and the second defective product outlet C84 opened by the transfer component C8. After flowing out, the defective products return to the inside of the feeding component 2 and can be sorted again.

[0058] Embodiment 2

[0059] Please refer to Figures 1 - 12 , a three-layer full-automatic color sorter that is easy for multiple sorting and selection is the same as Embodiment 1, and the difference is that the feeding component 2 is different:

[0060] The feeding component 2 includes a moving frame 161, a feeding trough 162 and a transition plate 163. The moving frame 161 is arranged on one side of the frame 1, and the feeding trough 162 is connected to the moving frame 161 through a spring. The lower surface of the feeding trough 162 has a second vibrator, and one end of the feeding trough 162 is fixed with a transition plate 163 corresponding to the conveyor belt 3.

[0061] The sorting method of a three-layer full-automatic color sorter that is easy for multiple sorting and selection is the same as that in Embodiment 1.

[0062] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-layer fully automatic color sorter that is easy to sort and select, characterized in that: include: A frame (1), wherein the lower surface of the frame (1) is connected to a support leg (6) via a threaded portion; A feeding assembly (2) is arranged at one end of the upper surface of the frame (1); A sorting component (4) is arranged at the other end of the upper surface of the frame (1), and a conveyor belt (3) for conveying materials is arranged between the sorting component (4) and the conveyor belt (3), and the conveyor belt (3) is arranged at three locations along the height direction of the frame (1); The sorting components (4) are evenly distributed at three locations along the height direction of the frame (1), and every two adjacent sorting components (4) are staggered with each other. From high to low, the three sorting components (4) are respectively connected below with a corresponding switching component A (5), a switching component B (7) and a switching component C (8) for respectively discharging finished products and defective materials. The adapter component B (7) comprises a first good product outlet B (71), a second good product outlet B (72) and a defective product outlet B (73), wherein the first good product outlet B (71) is arranged at both ends of a side wall of the adapter component B (7), the second good product outlet B (72) is arranged at a middle portion of a side wall of the adapter component B (7), and the first good product outlet B (71) and the second good product outlet B (72) are not connected to each other on the inner side, and the defective product outlet B (73) is arranged at the other side wall of the adapter component B (7), and the defective product outlet B (73) is evenly distributed at three locations along the long side of the adapter component B (7) that are not connected to each other on the inner side; The adapter component C (8) comprises a first good product outlet C (81), a second good product outlet C (82), a first good product outlet C (83) and a second good product outlet C (84), wherein the first good product outlet C (81) is arranged at two ends of one side wall of the adapter component C (8), the second good product outlet C (82) and the first good product outlet C (81) are arranged side by side and the inner sides of the two are not connected to each other, the second good product outlet C (84) is arranged at two ends of the other side wall of the adapter component C (8), and the first good product outlet C (83) is arranged in the middle of the other side wall of the adapter component C (8); Good product outlets A (51) are provided at both ends of one side wall of the adapter component A (5), and a defective product outlet A (52) is provided in the middle of one side wall. A partition plate (53) is provided inside the adapter component A (5) to separate its internal space so as to form a first material unloading area and a second material unloading area inside the adapter component A (5). The good product outlet A (51) is connected to the first material unloading area, and the defective product outlet A (52) is connected to the second material unloading area.

2. A three-layer fully automatic color sorter that is easy to sort and select according to claim 1, characterized in that: The inner side of the sorting component (4) comprises an upward camera (9), a reflector (10), a background plate (11), a blowing nozzle (12), a downward camera (14) and a lamp body (15); the upward camera (9) is arranged at the upper end of the inner side of the sorting component (4) to identify the upper surface of the material, and the reflecting mirror (10) and the upward camera (9) are arranged side by side; the blowing nozzle (12) is arranged at the middle part of the inner side of the sorting component (4) to blow the material to move during sorting; there is a lamp body (15) between the blowing nozzle (12) and the reflecting mirror (10) to illuminate the material, and a background plate (11) is arranged above the lamp body (15); and the downward camera (14) is arranged at the lower end of the inner side of the sorting component (4) to identify the lower surface of the material.

3. A three-layer fully automatic color sorter that is easy to sort and select according to claim 2, characterized in that: The lamp body (15) is arranged at four locations, and every two of the lamp bodies (15) are arranged on two sides of the mouthpiece (12).

4. The three-layer fully automatic color sorter that is easy to sort and select according to claim 2 is characterized in that: The reflector (10) is of an inclined structure and is provided with two locations to reflect the material into an upward-looking camera (9) and a downward-looking camera (14) respectively.

5. The three-layer fully automatic color sorter that is easy to sort and select according to claim 1 is characterized in that: A slanted material guide plate (55) is fixed to one side wall of the inner surface of the first material discharge area to guide defective materials into the inner side of the good material outlets A (51) at both ends, and the cross section of the material guide plate (55) is stepped. The other side wall of the inner surface of the first material discharge area is rotatably connected to a flow regulating plate (56) for adjusting the discharge flow rate.

6. The three-layer fully automatic color sorter that is easy to sort and select according to claim 1 is characterized in that: The feeding assembly (2) comprises a feeding hopper (21), a feeding cavity (22), a first vibrator (23) and a bracket (24); the bracket (24) is fixed to the upper surface of the frame (1); a feeding hopper (21) for storing materials is arranged on the bracket (24); a feeding cavity (22) is provided on the feeding hopper (21); and a first vibrator (23) is provided inside the feeding hopper (21).

7. The sorting method of a three-layer fully automatic color sorter that is easy to sort and select according to claim 1 is characterized in that: The steps include: Step A: The material is vibrated and discharged to the first-layer conveyor belt (3) by the feeding component (2), and the first-layer conveyor belt (3) conveys the material to the inner side of the sorting component (4), and the material is illuminated by the lamp body (15). The upward camera (9) and the downward camera (14) identify different surfaces of the material. After the finished product DE and the defective product FG are identified, the finished product DE and the defective product FG are separated by blowing through the blowing nozzle (12); Step B: the finished products DE and defective products FG separated by the highest sorting component (4) fall into the inner side of the transfer component A (5), and the finished products are respectively introduced into the inner sides of the two good product outlets A (51) through the guide plate (55). The two good product outlets A (51) discharge the finished products DE, and the defective product outlet A (52) discharges the defective products FG. When discharging, the locking bolts of the flow regulating plate (56) are loosened, and the inclination of the flow regulating plate (56) is adjusted to adjust the discharge flow rate. After discharging, the materials flow to the sorting component (4) in the middle layer through the conveyor belt (3) of the second layer; Step C: The sorting component (4) in the middle layer sorts finished product DE into finished product D and defective product E, and sorts defective product FG into finished product F and defective product G, and the finished products fall to the inner side of the transfer component B (7), and the finished product D and finished product F are respectively discharged through the first good product outlet B (71) and the second good product outlet B (72), and the defective product E and defective product G are discharged through the defective product outlet B (73), and flow to the lowest sorting component (4) through the third conveyor belt (3); Step D: The lowest sorting component (4) sorts and purifies the defective products E and G and flows them to the inner side of the transfer component C (8). The defective products and the good products flow out through the first good product outlet C (81), the second good product outlet C (82), the first good product outlet C (83) and the second good product outlet C (84) opened by the transfer component C (8). After flowing out, the defective products return to the inner side of the feeding component (2) and can be sorted again.

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