A visual screening machine

Abstract

The utility model relates to mechanical vision screening technical field discloses a kind of vision screening machines, comprising: light transmission carousel, feeding belt, rotary disc, upper detector and lower detector.Light transmission carousel is provided with at least two and is in up-down multilayer distribution, each light transmission carousel can rotate around its own axis, and each layer light transmission carousel is respectively used to carry the material to be screened.The feeding belt is provided with at least two and corresponds with the number of layers of light transmission carousel, and each feeding belt is located in the side of corresponding layer light transmission carousel, for conveying the material to be screened to light transmission carousel.The rotary disc is rotatably arranged between corresponding layer feeding belt and light transmission carousel.The upper detector and lower detector are respectively arranged on the two sides of each layer light transmission carousel, and the upper detector and lower detector can emit detection light and receive the optical signal of material feedback, for carrying out synchronous optical detection on the front and back of material on corresponding layer light transmission carousel.

Description

Technical Field

[0001] This utility model relates to the field of mechanical vision screening technology, specifically a vision screening machine. Background Technology

[0002] Vision sorting machines use optical inspection technology to identify appearance defects such as scratches, stains, and dimensional deviations on both sides of materials, and sort out qualified materials. They are key equipment for quality control in the production of small parts (such as screws and washers) and electronic components (such as capacitors and resistors), and are widely used in hardware, electronics and other industries.

[0003] Existing screening machines mostly adopt a single-layer light-transmitting turntable structure, with detectors only installed on one side of the turntable. During detection, the material needs to be processed again manually or by an additional flipping mechanism to complete the front and back detection. This not only increases the number of operation steps, but also leads to long detection time and low overall efficiency. If production capacity is to be increased, multiple machines need to be added horizontally side by side, which not only occupies more factory floor space, but also increases the cost of equipment procurement and daily operation and maintenance.

[0004] Therefore, a visual screening machine is urgently needed to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a visual sorting machine to solve the problem of material sorting by visual sorting machines.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A visual sorting machine, comprising:

[0008] The light-transmitting turntable is provided in at least two layers arranged vertically and horizontally. Each light-transmitting turntable can rotate around its own axis, and each layer of light-transmitting turntable is used to carry the material to be screened.

[0009] The feeding belts are provided in at least two and correspond to the number of layers of the light-transmitting turntable. Each feeding belt is located on the side of the light-transmitting turntable of the corresponding layer and is used to transport the material to be screened to the light-transmitting turntable.

[0010] A rotating disk is rotatably disposed between the feed belt and the light-transmitting turntable in the corresponding layer;

[0011] The upper detector and the lower detector are respectively set on both sides of the light-transmitting turntable of each layer. Both the upper detector and the lower detector can emit detection light and receive light signals fed back by the material, which are used to perform synchronous optical detection on the front and back sides of the material on the light-transmitting turntable of the corresponding layer.

[0012] The material is conveyed to the side of the rotating disk by the feeding belt. The rotation of the rotating disk brings the material to the light-transmitting turntable. The light-transmitting turntable rotates itself and drives the material to pass through the upper detector and the lower detector in sequence, so as to continuously screen the front and back of the material.

[0013] As a preferred embodiment of a visual sorting machine, a scraper is provided along the material conveying path of the feeding belt. A gap is formed between the wheel surface of the scraper and the upper surface of the feeding belt, which is adapted to the thickness of the material to be sorted. This gap is used to smooth out the stacked and offset material to be sorted on the feeding belt. Two adjacent feeding belts are connected by a channel. One end of the channel is connected to the discharge side of the upper feeding belt, and the scraper is adjacent to the discharge side of the upper feeding belt. The other end of the channel is connected to the feed side of the lower feeding belt.

[0014] As a preferred embodiment of a visual sorting machine, the scraper is connected to the feed belt via a third slide. The scraper moves up and down along the transport direction of the feed belt via the third slide to adjust the size of the gap to accommodate the thickness of the material.

[0015] As a preferred embodiment of a visual sorting machine, each of the feeding belts is equipped with a guide plate, and there is a gap between the guide plate and the top surface of the feeding belt. The size of the gap is adapted to the thickness of the material to be sorted. The bottom of the guide plate is provided with a groove, and the extension direction of the groove is the same as the material conveying direction of the feeding belt. The groove is open along the direction of material output. A baffle is provided at the open end of the groove, and there is a space between the baffle and the top surface of the feeding belt. The size of the space is adapted to the thickness of the material to be sorted.

[0016] As a preferred embodiment of a visual sorting machine, the guide plate and the feeding belt are connected by a first slide table. The guide plate moves back and forth along the transport direction of the feeding belt via the first slide table to adjust the size of the interval to accommodate the thickness of the material.

[0017] As a preferred embodiment of a visual sorting machine, the baffle is connected to the feeding belt via a second slide. The baffle moves up and down along the transport direction of the feeding belt via the second slide to adjust the size of the space to accommodate the thickness of the material.

[0018] As a preferred embodiment of a visual screening machine, each layer of the light-transmitting turntable has at least one air blowing channel spaced at intervals along its own rotation direction on its side. The air outlet of the air blowing channel faces the radial inner side of the light-transmitting turntable. The air blowing channel can output directional airflow, and the airflow direction is from the edge to the center along the radial direction of the light-transmitting turntable.

[0019] As a preferred embodiment of a visual screening machine, the air outlet is provided with a plurality of outlets, which are respectively arranged along the vertical direction of the air blowing channel. Each air outlet is corresponding to each layer of the light-transmitting turntable, so that the airflow output from the air outlet acts on the material on the corresponding layer of the light-transmitting turntable.

[0020] As a preferred embodiment of a visual sorting machine, each layer of the light-transmitting turntable is equipped with a scraper. The scraper extends from the center of the light-transmitting turntable to the edge, and there is a gap between the bottom of the scraper and the surface of the light-transmitting turntable for material to pass through. When the light-transmitting turntable rotates, the scraper pushes the material flat. The bottom of the lowest layer of the light-transmitting turntable is equipped with a storage bin. The opening of the storage bin corresponds to the direction in which the material is scraped out through the gap. The storage bin is used to collect the material.

[0021] As a preferred embodiment of a visual sorting machine, the storage bin is connected to the uppermost feeding belt via a stepped belt, which circulates the material from the storage bin to the feeding belt.

[0022] The beneficial effects of this utility model are as follows:

[0023] (1) By setting the upper detector and the lower detector respectively above and below each layer of light-transmitting turntable, and the light-transmitting turntable itself rotates to drive the material to continuously pass through the detection area, the front and back sides of the material in the same layer can be optically detected simultaneously without the need for an additional flipping process, thereby avoiding the time-consuming problem of secondary operation required by traditional unidirectional detection and greatly improving the detection efficiency of a single batch of materials.

[0024] (2) By setting up multi-layer feeding belts corresponding to the number of layers of the light-transmitting turntable, and cooperating with the upper and lower distributed light-transmitting turntable structure, the vertical space is fully utilized for layered operation, avoiding the disadvantage of traditional single-layer equipment that needs to be expanded horizontally to increase production capacity. This ensures that multi-layer materials are screened synchronously in a volume similar to that of traditional equipment, saving factory space and improving overall work efficiency by multiple times through parallel processing.

[0025] (3) By setting a rotating disk with an adaptive feed section and discharge section between the feeding belt and the light-transmitting turntable, the material is transported to the side of the rotating disk by the feeding belt. With the help of the centrifugal force generated by the rotation of the rotating disk, it can be splashed onto the light-transmitting turntable evenly and stably. Compared with the traditional direct push material transfer, it is less likely to cause material accumulation or deviation, thus ensuring the continuous and smooth material transfer process and providing a foundation for the stability of subsequent testing. Attached Figure Description

[0026] Figure 1 A schematic diagram of the overall structure of a visual sorting machine provided by this utility model;

[0027] Figure 2A schematic diagram of the overall structure of a visual screening machine with the protective cover removed in the first direction, provided by this utility model;

[0028] Figure 3 A schematic diagram of the overall structure of a visual screening machine with the protective cover removed, provided by this utility model;

[0029] Figure 4 A schematic diagram of the overall structure of a visual screening machine with the protective cover removed, provided by this utility model;

[0030] Figure 5 A schematic diagram of the overall structure of the upper and lower detectors on the light-transmitting turntable in a visual sorting machine provided by this utility model in the first direction;

[0031] Figure 6 A schematic diagram of the overall structure of the first direction of the light-transmitting turntable in the second direction of the upper and lower detectors of the light-transmitting turntable in a visual sorting machine provided by this utility model;

[0032] Figure 7 A schematic diagram of the overall structure for installing a feeding belt in a vision screening machine provided by this utility model;

[0033] Figure 8 This utility model provides an overall structural diagram of a visual sorting machine with a guide plate installed.

[0034] The following are the labeling elements in the figure:

[0035] 1. Transparent turntable; 2. Feeding belt; 3. Rotary disc; 4. Upper detector; 5. Lower detector; 7. Stand; 8. Fourth slide; 9. Fifth slide; 10. Air duct; 11. Air outlet; 12. Slot; 13. Scraper; 14. Storage bin; 15. Stepped belt; 17. Scraper wheel; 18. Third slide; 19. Guide plate; 20. Baffle; 21. First slide; 22. Second slide; 23. Channel; 24. Feed plate; 25. Groove; 26. Through-beam fiber optic sensor. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0041] In one embodiment of this utility model, such as Figure 1-8As shown, a visual sorting machine is provided, including: a light-transmitting turntable 1, a feeding belt 2, a rotating disk 3, an upper detector 4, and a lower detector 5. The light-transmitting turntable 1 is provided in at least two layers, arranged vertically and in multiple layers. Each light-transmitting turntable 1 can rotate around its own axis, and each layer of the light-transmitting turntable 1 is used to carry the material to be sorted. The feeding belt 2 is provided in at least two layers, corresponding to the number of layers of the light-transmitting turntable 1. Each feeding belt 2 is located to the side of the corresponding layer of the light-transmitting turntable 1, and is used to transport the material to be sorted to the light-transmitting turntable 1. The rotating disk 3 is rotatably disposed between the corresponding layer of the feeding belt 2 and the light-transmitting turntable 1. The upper detector 4 and the lower detector 5 are respectively disposed on both sides of each layer of the light-transmitting turntable 1. Both the upper detector 4 and the lower detector 5 can emit detection light and receive light signals from the material, and are used to perform synchronous optical detection of the front and back sides of the material on the corresponding layer of the light-transmitting turntable 1. The material is conveyed to the side of the rotating disk 3 by the feeding belt 2. The rotating disk 3 carries the material to the light-transmitting rotating disk 1. The light-transmitting rotating disk 1 drives the material to pass through the upper detector 4 and the lower detector 5 in sequence, so as to continuously screen the front and back of the material.

[0042] The visual sorting machine provided in this utility model sets the upper detector 4 and the lower detector 5 above and below each layer of light-transmitting turntable 1, respectively. The light-transmitting turntable 1 rotates itself to drive the material to continuously pass through the detection area, so that the front and back sides of the material in the same layer can be optically detected simultaneously without the need for an additional flipping process. This avoids the time-consuming problem of secondary operation required by traditional unidirectional detection and greatly improves the detection efficiency of a single batch of materials.

[0043] By setting up multi-layer feeding belts 2 corresponding to the number of layers of the light-transmitting turntable 1, and cooperating with the vertically distributed light-transmitting turntable 1 structure, the vertical space is fully utilized for layered operation, avoiding the drawback of traditional single-layer equipment that needs to be expanded horizontally to increase production capacity. This ensures that multi-layer materials are screened simultaneously in a volume similar to traditional equipment, saving factory space and improving overall work efficiency several times over through parallel processing.

[0044] By setting a rotating disk 3 with an adapted feeding section and a discharging section between the feeding belt 2 and the light-transmitting turntable 1, the material is conveyed by the feeding belt 2 to the side of the rotating disk 3. With the help of the centrifugal force generated by the rotation of the rotating disk 3, the material can be evenly and stably splashed onto the light-transmitting turntable 1. Compared with the traditional direct push material transfer, it is less likely to cause material accumulation or deviation, thus ensuring the continuous and smooth material transfer process and providing a foundation for the stability of subsequent testing.

[0045] In this embodiment, the light-transmitting turntable 1 can be made of glass to facilitate observation by the upper detector 4 and the lower detector 5.

[0046] like Figure 4 As shown, in this embodiment, a through-beam fiber optic sensor 26 can also be installed around the light-transmitting turntable 1 to detect materials.

[0047] like Figure 4-6 As shown, in this embodiment, the upper detector 4 and the lower detector 5 can be installed by installing the frame 7. To improve the adaptability of the upper detector 4 and the lower detector 5 to each layer of light-transmitting turntable 1, the upper detector 4 and the lower detector 5 can be respectively installed on the frame 7 by installing the fourth slide 8 and the fifth slide 9. This allows the upper detector 4 and the lower detector 5 to be adjusted in height respectively, so that the material on the light-transmitting turntable 1 can be clearly seen, thereby improving the accuracy of screening.

[0048] In this embodiment, at least one air duct 10 is provided at intervals along the rotation direction on the side of each layer of light-transmitting turntable 1 to ensure that the material at each position remains on the light-transmitting turntable 1 without falling off. The air outlet 11 of the air duct 10 faces the radially inner side of the light-transmitting turntable 1, so that the air duct 10 outputs directional airflow, and the airflow direction can be from the edge to the center along the radial direction of the light-transmitting turntable 1, ensuring that the airflow output from the air outlet 11 can effectively act on the material on the corresponding layer of light-transmitting turntable 1, and avoid airflow deviation affecting the regularization or screening effect of the material.

[0049] like Figure 5 As shown, more specifically, there are several air outlets 11, which are arranged at intervals along the vertical direction of the air blowing channel 10. The spacing between adjacent air outlets 11 is adapted to the spacing of each layer of light-transmitting turntable 1, so that the airflow output from the air outlets 11 acts on the material on the corresponding layer of light-transmitting turntable 1.

[0050] like Figure 6 As shown, furthermore, a slot 12 can be made on the air outlet 11 of the air blowing duct 10, facing away from the light-transmitting turntable 1, so that the light-transmitting turntable 1 can be inserted deep into the air outlet 11. This shortens the distance between the air outlet 11 and the material on the surface of the light-transmitting turntable 1, reducing diffusion loss during airflow transmission; at the same time, the slot 12 can guide and constrain the airflow, preventing the airflow from escaping to both sides, ensuring that the airflow can act on the material with a higher concentration, enhancing the directional pushing force on the material, especially suitable for the precise shaping of lightweight or small-sized materials, ensuring that the material is stably placed in the detection area of ​​the light-transmitting turntable 1, and improving the accuracy of screening.

[0051] like Figure 2 and Figure 5 As shown, in this embodiment, each layer of the light-transmitting turntable 1 is provided with a scraper 13. The scraper 13 extends from the center of the light-transmitting turntable 1 to the edge. There is a gap between the bottom of the scraper 13 and the surface of the light-transmitting turntable 1 for material to pass through. When the light-transmitting turntable 1 rotates, the scraper 13 pushes the material flat. The bottom of the lowest layer of the light-transmitting turntable 1 is provided with a storage bin 14. The opening of the storage bin 14 corresponds to the direction in which the material is scraped out through the gap. When the accumulated material is scraped by the gap of the scraper 13, some material will fall down. The storage bin 14 can collect the material.

[0052] like Figure 4 As shown, preferably, the storage bin 14 and the uppermost feeding belt 2 are connected by a stepped belt 15. The stepped belt 15 circulates the material from the storage bin 14 to the feeding belt 2, avoiding material accumulation and improving material detection efficiency.

[0053] The feeding belt 2 and the stepped belt 15 can be equipped with suitable motors to drive them according to actual conditions, and furthermore, their speeds can be varied according to actual conditions.

[0054] like Figure 4 and Figure 8 As shown, further, in order to screen the material on the feeding belt 2, a scraper 17, a guide plate 19 and a baffle 20 can be set on the feeding belt 2.

[0055] like Figure 4 As shown, in this embodiment, a scraper 17 is provided along the material conveying path of the feeding belt 2. A motor can be installed to drive the scraper 17 for orderly screening. A gap adapted to the thickness of the material to be screened is formed between the wheel surface of the scraper 17 and the upper surface of the feeding belt 2. The scraper 17 is used to smooth out the stacked and offset material to be screened on the feeding belt 2. Preferably, the scraper 17 and the feeding belt 2 are connected by a third slide 18. The scraper 17 moves up and down along the conveying direction of the feeding belt 2 via the third slide 18 to adjust the size of the gap to adapt to the thickness of the material.

[0056] As the material is conveyed along the feeding belt 2, it passes through the rotating screen of the scraper 17, making the material more uniform and improving the accuracy of screening. For example... Figure 4 As shown, it is not easy to screen all the piled materials successfully at once, and some materials will fall into the corner. The conveyor belt 2 should be used for conveying, and a channel 23 can be added for this purpose.

[0057] like Figure 4 As shown, the two adjacent feeding belts 2 are further connected by a channel 23. One end of the channel 23 is connected to the discharge side of the upper feeding belt 2, the scraper 17 is adjacent to the discharge side of the upper feeding belt 2, and the other end of the channel 23 is connected to the feed side of the lower feeding belt 2.

[0058] After the material from the upper feeding belt 2 is conveyed to the lower feeding belt 2 through the channel 23, it can pass through the scraper 17 of the lower feeding belt 2 again for secondary rolling screening, forming a "relay screening", which further improves the overall uniformity of the material, reduces the detection error of the subsequent light-transmitting turntable 1 due to insufficient screening in a single time, and further improves the screening accuracy.

[0059] like Figure 4 As shown, furthermore, the material can be guided to the storage bin 14 via the channel 23 corresponding to the last layer of the feeding belt 2, thereby improving the material circulation screening efficiency.

[0060] like Figure 4 and Figure 8 As shown, each feeding belt 2 is equipped with a guide plate 19, and there is a gap between the guide plate 19 and the top surface of the feeding belt 2. The size of the gap is adapted to the thickness of the material to be screened.

[0061] like Figure 8 As shown, the bottom of the guide plate 19 is provided with a groove 25, and the extension direction of the groove 25 is the same as the material conveying direction of the feeding belt 2. The groove 25 is open along the direction of material output, and a baffle 20 is provided at the open end of the groove 25. There is a space between the baffle 20 and the top surface of the feeding belt 2, and the size of the space is adapted to the thickness of the material to be screened.

[0062] In this embodiment, the groove 25 is equivalent to a storage bin. The material flows into the groove 25 through intervals, while the space of the baffle 20 blocks most of the material in the groove 25, so that some of the material passes through evenly, thereby allowing the material to be screened multiple times, and further making the material more uniform.

[0063] like Figure 3 As shown, preferably, the guide plate 19 and the feeding belt 2 are connected by a first slide table 21. The guide plate 19 moves back and forth along the transport direction of the feeding belt 2 via the first slide table 21 to adjust the size of the interval to adapt to the thickness of the material.

[0064] like Figure 4 and Figure 8 As shown, similarly, the baffle 20 is connected to the feeding belt 2 via the second slide 22. The baffle 20 moves up and down along the transport direction of the feeding belt 2 via the second slide 22 to adjust the size of the space to accommodate the thickness of the material. The arrangement of the first slide 21 and the second slide 22 allows the guide plate 19 and the baffle 20 to adapt to the thickness of various materials, thereby screening out materials of a preset thickness and improving the accuracy of screening.

[0065] like Figure 2 and Figure 4 As shown, a guide plate 24 can be installed in the direction of the splashed material on the turntable. The guide plate 24 rotates at a certain angle toward the center of the light-transmitting turntable 1. When the material splashes to the side of the guide plate 24, the guide plate 24 can block the material, so that the material spreads out as the light-transmitting turntable 1 rotates.

[0066] In this embodiment, the material detection steps are as follows: the material to be screened enters the uppermost feeding belt 2 and is conveyed to the scraper 17. The scraper 17 sorts and shifts the stacked material through the matching gap with the feeding belt 2, making it initially flat. The flattened material enters the groove 25 of the guide plate 19. The groove 25 cooperates with the baffle 20 to screen out the material that meets the thickness requirements through the interval and space size. The excess material is temporarily stored in the groove 25. The residual material that is not fully screened by the upper feeding belt 2 falls into the lower feeding belt 2 through the channel 23, and the screening process of the scraper 17 and the guide plate 19 is repeated to form a relay process. The qualified material is conveyed by the feeding belt 2 to On the side of the rotating disk 3, the rotating disk 3 uses centrifugal force to evenly splash the material onto the corresponding layer of the light-transmitting rotating disk 1; the rotating light-transmitting rotating disk 1 rotates and drives the material through the upper and lower detectors 5, which simultaneously emit detection light and receive feedback signals to complete the optical detection of the front and back of the material; during the detection process, the blowing channel 10 pushes the deviated material back to the center of the light-transmitting rotating disk 1 through the directional airflow of the slot 12; after the detection, the scraper 13 pushes the material on the light-transmitting rotating disk 1 to the edge, and the qualified material falls into the bottom storage bin 14 through the gap; the material in the storage bin 14 returns to the upper feeding belt 2 through the stepped belt 15 to realize the secondary detection of the unqualified material and improve the overall screening efficiency.

[0067] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A visual sorting machine, characterized in that, include: The light-transmitting turntable is provided in at least two layers arranged vertically and horizontally. Each light-transmitting turntable can rotate around its own axis, and each layer of light-transmitting turntable is used to carry the material to be screened. The feeding belts are provided in at least two and correspond to the number of layers of the light-transmitting turntable. Each feeding belt is located on the side of the light-transmitting turntable of the corresponding layer and is used to transport the material to be screened to the light-transmitting turntable. A rotating disk is rotatably disposed between the feed belt and the light-transmitting turntable in the corresponding layer; The upper detector and the lower detector are respectively set on both sides of the light-transmitting turntable of each layer. Both the upper detector and the lower detector can emit detection light and receive light signals fed back by the material, which are used to perform synchronous optical detection on the front and back sides of the material on the light-transmitting turntable of the corresponding layer. The material is conveyed to the side of the rotating disk by the feeding belt. The rotation of the rotating disk brings the material to the light-transmitting turntable. The light-transmitting turntable rotates itself and drives the material to pass through the upper detector and the lower detector in sequence, so as to continuously screen the front and back of the material.

2. The visual sorting machine according to claim 1, characterized in that, A scraper is provided along the material conveying path of the feeding belt. A gap is formed between the wheel surface of the scraper and the upper surface of the feeding belt, which is adapted to the thickness of the material to be screened. This gap is used to smooth out the stacked and offset material to be screened on the feeding belt. Two adjacent feeding belts are connected by a channel. One end of the channel is connected to the discharge side of the upper feeding belt, and the scraper is adjacent to the discharge side of the upper feeding belt. The other end of the channel is connected to the feed side of the lower feeding belt.

3. A visual sorting machine according to claim 2, characterized in that, The scraper is connected to the feeding belt via a third slide. The scraper moves up and down along the transport direction of the feeding belt via the third slide to adjust the size of the gap to accommodate the thickness of the material.

4. A visual sorting machine according to any one of claims 1-3, characterized in that, Each of the feeding belts is equipped with a guide plate, and there is a gap between the guide plate and the top surface of the feeding belt. The size of the gap is adapted to the thickness of the material to be screened. The bottom of the guide plate is provided with a groove, and the extension direction of the groove is the same as the material conveying direction of the feeding belt. The groove is open along the direction of material output. A baffle is provided at the open end of the groove. There is a space between the baffle and the top surface of the feeding belt. The size of the space is adapted to the thickness of the material to be screened.

5. A visual sorting machine according to claim 4, characterized in that, The guide plate is connected to the feeding belt via a first slide table. The guide plate moves back and forth along the transport direction of the feeding belt via the first slide table to adjust the size of the interval to accommodate the thickness of the material.

6. A visual sorting machine according to claim 4, characterized in that, The baffle is connected to the feeding belt via a second slide. The baffle moves up and down along the transport direction of the feeding belt via the second slide to adjust the size of the space to accommodate the thickness of the material.

7. A visual sorting machine according to claim 1, 2, 3, 5, or 6, characterized in that, Each layer of the light-transmitting turntable has at least one air blowing channel spaced apart on its side along its own rotation direction. The air outlet of the air blowing channel faces the radial inner side of the light-transmitting turntable. The air blowing channel can output directional airflow, and the airflow direction is from the edge to the center along the radial direction of the light-transmitting turntable.

8. A visual sorting machine according to claim 7, characterized in that, The air outlet is provided in several ways and is arranged vertically along the air blowing channel. Each air outlet is arranged corresponding to each layer of the light-transmitting turntable, so that the airflow output from the air outlet acts on the material on the corresponding layer of the light-transmitting turntable.

9. A visual sorting machine according to claim 1, 2, 3, 5, 6, or 8, characterized in that, Each layer of the light-transmitting turntable is equipped with a scraper. The scraper extends from the center of the light-transmitting turntable to the edge, and there is a gap between the bottom of the scraper and the surface of the light-transmitting turntable for material to pass through. When the light-transmitting turntable rotates, the scraper pushes the material flat. The bottom of the light-transmitting turntable of the lowest layer is equipped with a storage bin. The opening of the storage bin corresponds to the direction in which the material is scraped out by the gap. The storage bin is used to collect the material.

10. A visual sorting machine according to claim 9, characterized in that, The storage bin is connected to the uppermost feeding belt via a stepped belt, which circulates the material from the storage bin to the feeding belt.

Images