Food screening device based on visual inspection

Abstract

The invention relates to the field of food detection, in particular to a food screening device based on visual detection, which comprises a screening mechanism and a detection mechanism, the detection mechanism is used for performing visual detection on food; the detection mechanism is mounted on the screening assembly; the screening mechanism comprises a conveying part and a screening part, the detection mechanism is installed on the conveying part, and the screening part is installed at the discharging end of the conveying part; the conveying part is used for correcting the position of the food; and the screening part is used for removing defective products. According to the food screening device, food can stably move along with the conveying rhythm, the situation that the overall screening efficiency is affected due to blocking is avoided, the applicability of the device can be effectively improved, operation links in the next procedure can be reduced, qualified food and unqualified food can be divided and independently collected, the situation that after food visual inspection, confusion occurs can be effectively prevented, and the screening efficiency is improved. And the detection and screening quality can be effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of food testing technology, and specifically relates to a food screening device based on visual inspection. Background Technology

[0002] Food refers to substances that can be consumed or drunk by humans. It typically includes natural ingredients (such as grains, fruits and vegetables, meat, poultry, aquatic products, eggs and dairy products) and various processed products (such as bread, beverages, canned goods, snacks, etc.). Its core function is to provide the human body with energy and nutrients (such as carbohydrates, proteins, fats, vitamins, minerals, etc.) to maintain life activities, growth and development and health needs. It must also meet safety and hygiene standards and does not include tobacco, drugs or substances used only for medical purposes.

[0003] A search revealed that Chinese Patent Publication No. CN213825952U, authorized on July 30, 2021, discloses a food visual inspection and screening production line, belonging to the field of food inspection. This production line includes a conveyor belt, an inspection device, and a screening device. The inspection device is connected to the output end of the conveyor belt, and the screening device is connected to the output end of the inspection device. A feeding and sorting device is connected to the input end of the conveyor belt. A rotating disk is rotatably connected to the top of a power unit, and a material distribution column is rotatably connected to the outer wall of the rotating disk. A pusher box is connected to the material distribution column, and its output end is connected to the input end of the conveyor belt. A pushing assembly is provided inside the pusher box, including a push plate and a push rod. The push rod is fixed to the side wall of the push plate and connected to a sliding block. A sliding groove is provided inside the sliding block, and a rotating assembly is connected to the sliding block. This food visual inspection and screening production line can feed large quantities of food onto the conveyor belt one by one for inspection, ensuring the accuracy of inspection and screening, reducing the labor intensity of workers, and accelerating the feeding efficiency.

[0004] However, the device still has the following drawbacks: it cannot adjust the position of the food during visual inspection, cannot place the food in the optimal inspection position of the visual inspection agency, and cannot be used to inspect different foods. Summary of the Invention

[0005] To address the above problems, the present invention provides a food screening device based on visual inspection, including a screening mechanism and a detection mechanism; The testing facility is used for visual inspection of food. The detection mechanism is installed on the screening assembly; The screening mechanism includes a conveying component and a screening component. The detection mechanism is installed on the conveying component, and the screening component is installed at the discharge end of the conveying component. The conveyor is used to correct the position of the food. The screening component is used to remove defective products.

[0006] Furthermore, the conveying component includes a first conveyor belt and an adjustment assembly disposed on the first conveyor belt; The first conveyor belt is used to transport food. The detection mechanism is fixedly installed on the first conveyor belt; The adjustment assembly includes a guide and a calibrator, the guide being used to adjust the position of the calibrator, and the calibrator being mounted on the guide; The calibration device is used to align the food item. The guide includes a guide rail and a first motor, as well as a lead screw rotatably mounted in the guide rail. The output end of the first motor is connected to the lead screw in a transmission connection. Two sets of sliders are threaded onto the lead screw, and the calibration component is mounted on the sliders. As the lead screw rotates, the two sliders move relative to each other along the guide rail.

[0007] Furthermore, the calibration component includes a calibration plate and a roller. The calibration plate is fixedly mounted on the slider, and a buffer is installed on the side of the calibration plate. The roller is rotatably mounted on the buffer. The surface of the roller is provided with a silicone layer, and the surface of the silicone layer is provided with a knurled pattern.

[0008] Furthermore, the buffer component includes a spring, a movable tube, and a sleeve. The spring is fixedly sleeved on the sleeve, the movable tube is slidably mounted on the sleeve, one end of the spring is fixedly connected to the movable tube, the sleeve is fixedly mounted on the side of the calibration plate, and the roller is rotatably mounted on the end of the movable tube away from the calibration plate.

[0009] Furthermore, a clamping component is provided inside the movable tube. The clamping component includes a fixed tube, which is disposed inside the movable tube. A threaded tube is slidably installed inside the fixed tube, and a clamping bolt is threaded inside the threaded tube. The clamping bolt passes through the calibration plate and the sleeve. The nut of the clamping bolt can abut against the side of the calibration plate. A guide block is provided on the side wall of the threaded tube, and a guide groove is formed on the inner wall of the fixed tube to slide with the guide block.

[0010] Furthermore, the screening component includes a support, a first roller shaft, and a second roller shaft. The first roller shaft is slidably mounted on the support, and the second roller shaft is rotatably mounted on the support. A second motor is fixedly mounted on the support, and the second motor is connected to the first roller shaft and the second roller shaft via a transmission component. One end of the bracket is fixedly installed on the bracket of the first conveyor belt.

[0011] Furthermore, the transmission component includes a driving wheel and a driven wheel. The driving wheel is drivenly connected to the output shaft of the second motor, and the driven wheel is drivenly connected to the first roller shaft and the second roller shaft. The driving wheel is drivenly connected to the driven wheel via a synchronous belt.

[0012] Furthermore, the bracket has a strip groove, a movable block is slidably installed in the strip groove, a threaded hole is opened on the side of the movable block, a locking bolt is threaded in the threaded hole, the locking bolt can lock the movable block in the strip groove, and the first roller shaft is rotatably installed on the side of the movable block.

[0013] Furthermore, the bracket is provided with a diversion mechanism, which includes an electric push rod, an electric slide table, and a guide plate. The electric slide table is fixedly installed on the bracket, the electric push rod is fixedly installed on the sliding block of the electric slide table, the guide plate is fixedly installed on the bracket, and the telescopic end of the electric push rod is provided with a material feeding plate.

[0014] Furthermore, a second conveyor belt is provided on the support, the second conveyor belt is located below the electric push rod, the guide plate is located on the second conveyor belt, a third motor is fixedly installed on the support, the output end of the third motor is provided with a rotating plate, the rotating plate is located at the discharge port of the guide plate, and the third motor is fixedly installed on the support.

[0015] The beneficial effects of this invention are: 1. When food enters between the two calibration plates, the first motor drives the two calibration plates to move relative to each other, adjusting the distance between the rollers and the food. This allows the rollers to guide the food, making it suitable for various food sizes without frequent component replacements. It also forces the calibration of disordered food postures, such as correcting the sideways movement of blocky food and the crossing of strip-shaped food, providing a stable foundation for subsequent testing. At the same time, the spring buffer compensates for slight deviations in the food during the conveying process, ensuring calibration consistency. The close contact between the roller surface and the food reduces slippage, allowing the food to move smoothly with the conveying rhythm and avoiding jamming that affects the overall screening efficiency. This effectively improves the applicability of the device.

[0016] 2. By rotating the tightening bolt to change the spring compression, the force can be matched and calibrated according to the hardness characteristics of the food, such as soft bread and hard nuts. This avoids insufficient force from effectively calibrating the posture or excessive force from damaging the food. The same set of rollers can be adjusted through the tightening bolt to adapt to different elasticity requirements. It can be compatible with multiple types of food without replacing the spring, thus improving the applicability of the device. When the spring becomes fatigued due to long-term use, the preload can be readjusted through the tightening bolt to restore its performance, extend the service life of the components, reduce the frequency of replacement, and facilitate maintenance and adjustment.

[0017] 3. After visual inspection, the food enters the screening unit. The food is conveyed by the first and second rollers. During the conveying process, undersized food and empty food bags fall into the collection box below through the preset gap between the first and second rollers for collection. Food that meets the size requirements is conveyed by the first and second rollers to the next process. Undersized food and empty food bags can be rejected, which can reduce the operation steps in the next process and effectively improve the detection and screening quality.

[0018] 4. After the food is screened, the first and second rollers feed it onto the second conveyor belt. At this time, the electric drive and electric slide move according to the data detected by the detection mechanism, moving the unqualified food to the channel formed by the guide plates. The food enters the channel and is conveyed to the rotating plate. After falling onto the rotating plate, the third motor works, driving the rotating plate to flip and fall into the unqualified product collection box. The qualified products are conveyed to the qualified product collection box by the guide trough at the discharge of the second conveyor belt. This can separate qualified and unqualified food and collect them separately, which can effectively prevent confusion after visual inspection of food and effectively improve the quality of detection and screening.

[0019] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure according to an embodiment of the present invention is shown.

[0022] Figure 2 An embodiment of the present invention is shown. Figure 1 Enlarged schematic diagram of the structure of section A in the middle.

[0023] Figure 3 An isometric schematic diagram of a bracket according to an embodiment of the present invention is shown.

[0024] Figure 4 A schematic cross-sectional view of a buffer element according to an embodiment of the present invention is shown.

[0025] Figure 5 An embodiment of the present invention is shown. Figure 4 Enlarged schematic diagram of section B in the middle.

[0026] Figure 6 An exploded view of the active tube and sleeve according to an embodiment of the present invention is shown.

[0027] Figure 7 An exploded view of the fixed tube and threaded tube according to an embodiment of the present invention is shown.

[0028] In the diagram: 1. Screening mechanism; 2. Detection mechanism; 3. Conveying component; 4. Screening component; 5. First conveyor belt; 6. Guide rail; 7. First motor; 8. Lead screw; 9. Slider; 10. Calibration plate; 11. Roller; 12. Buffer component; 13. Spring; 14. Movable tube; 15. Sleeve; 16. Fixed tube; 17. Threaded tube; 18. Tightening bolt; 19. Guide block; 20. Guide groove; 21. Support; 22. First roller shaft; 23. Second roller shaft; 24. Second motor; 25. Transmission component; 26. Driving wheel; 27. Driven wheel; 28. Strip groove; 29. ​​Movable block; 30. Locking bolt; 31. Synchronous belt; 32. Electric push rod; 33. Electric slide table; 34. Guide plate; 35. Material feeding plate; 36. Second conveyor belt; 37. Third motor; 38. Rotating plate; 39. Shim; 40. Limiting plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This invention provides a food screening device based on visual inspection, see below. Figures 1-3 It includes a screening mechanism 1 and a testing mechanism 2; Testing agency 2 is used for visual inspection of food; The detection mechanism 2 is installed on the screening assembly; The screening mechanism 1 includes a conveying component 3 and a screening component 4. The detection mechanism 2 is installed on the conveying component 3, and the screening component 4 is located at the discharge end of the conveying component 3. Conveyor 3 is used for positional correction of the food. Screening element 4 is used to remove defective products; The conveying component 3 includes a first conveyor belt 5 and an adjusting assembly disposed on the first conveyor belt 5; The first conveyor belt 5 is used to transport food. The testing mechanism 2 is fixedly installed on the first conveyor belt 5; The adjustment assembly includes a guide and a calibrator. The guide is used to adjust the position of the calibrator, and the calibrator is mounted on the guide. The calibration piece is used to align the food items. The guide includes a guide rail 6 and a first motor 7, as well as a lead screw 8 rotatably installed in the guide rail 6. The output end of the first motor 7 is connected to the lead screw 8 for transmission. Two sets of sliders 9 are threaded on the lead screw 8, and the calibration component is installed on the sliders 9. As the lead screw 8 rotates, the two sliders 9 move relative to each other along the guide rail 6.

[0031] Using the above scheme, when visually inspecting different foods, the first conveyor belt 5 feeds the food into the position of the inspection mechanism 2. During this process, the first motor 7 works, driving the lead screw 8 to rotate, causing the two sliders 9 to slide in a straight line within the guide rail 6, thereby driving the calibration component to move relative to each other. This allows the calibration component to adjust the position of various foods of different sizes, so that the foods move in a linear arrangement.

[0032] For example, see Figure 1 The calibration component includes a calibration plate 10 and a roller 11. The calibration plate 10 is fixedly mounted on the slider 9. A buffer 12 is mounted on the side of the calibration plate 10, and the roller 11 is rotatably mounted on the buffer 12. The surface of roller 11 is provided with a silicone layer, and the surface of the silicone layer is provided with knurling.

[0033] It should be noted that the use of the silicone layer allows the roller 11 to make flexible contact with the food, avoiding damage to soft and brittle foods and thus ensuring quality.

[0034] Using the above scheme, when the food enters between the two calibration plates 10, the first motor 7 drives the two calibration plates 10 to move relative to each other, adjusting the distance between the roller 11 and the food. This allows the roller 11 to guide the food, which can adapt to various food sizes without frequent component replacements. It can also force calibration of disordered food postures, such as correcting the sideways movement of blocky food and the crossing of strip-shaped food. This provides a stable foundation for the subsequent testing mechanism 2. At the same time, the spring 13 can buffer and compensate for slight deviations in the food during the conveying process, ensuring calibration consistency. The close contact between the roller 11 surface and the food reduces slippage, allowing the food to move smoothly with the conveying rhythm and avoiding the impact of jamming on the overall screening efficiency. This can effectively improve the applicability of the device.

[0035] For example, see Figures 4-7The buffer 12 includes a spring 13, a movable tube 14 and a sleeve 15. The spring 13 is fixedly sleeved on the sleeve 15, the movable tube 14 is slidably mounted on the sleeve 15, one end of the spring 13 is fixedly connected to the movable tube 14, the sleeve 15 is fixedly mounted on the side of the calibration plate 10, and the roller 11 is rotatably mounted on the end of the movable tube 14 away from the calibration plate 10. The movable tube 14 is equipped with a clamping component, which includes a fixed tube 16. The fixed tube 16 is located inside the movable tube 14. A threaded tube 17 is slidably installed inside the fixed tube 16. A clamping bolt 18 is threadedly installed inside the threaded tube 17. The clamping bolt 18 passes through the calibration plate 10 and the sleeve 15. The nut of the clamping bolt 18 can abut against the side of the calibration plate 10. A guide block 19 is provided on the side wall of the threaded tube 17. A guide groove 20 is opened on the inner wall of the fixed tube 16 to slide with the guide block 19.

[0036] It should be noted that the tightening bolt 18 is threaded and installed at the through-hole of the calibration plate 10; A limit plate 40 is provided at the end of the threaded tube 17 to prevent the threaded tube 17 from separating from the fixed tube 16 during the elastic deformation of the spring.

[0037] By adopting the above solution, the compression of spring 13 can be changed by rotating the tightening bolt 18. The force can be matched and calibrated according to the hardness characteristics of food, such as soft bread and hard nuts. This avoids the situation where the force is too small to effectively calibrate the posture or too large to damage the food. The same set of rollers 11 can be adjusted by the tightening bolt 18 to adapt to different elasticity requirements. It can be compatible with multiple types of food without replacing spring 13, thus improving the applicability of the device. When spring 13 becomes fatigued due to long-term use, its performance can be restored by readjusting the preload through the tightening bolt 18, which can extend the service life of the component, reduce the replacement frequency, and facilitate maintenance and adjustment.

[0038] For example, see Figure 1 and Figure 3 The screening component 4 includes a support 21, a first roller 22 and a second roller 23. The first roller 22 is slidably mounted on the support 21, and the second roller 23 is rotatably mounted on the support 21. A second motor 24 is fixedly mounted on the support 21, and the second motor 24 is connected to the first roller 22 and the second roller 23 through a transmission component 25. One end of the bracket 21 is fixedly installed on the bracket 21 of the first conveyor belt 5; The transmission component 25 includes a driving wheel 26 and a driven wheel 27. The driving wheel 26 is connected to the output shaft of the second motor 24, and the driven wheel 27 is connected to the first roller shaft 22 and the second roller shaft 23. The driving wheel 26 is connected to the driven wheel 27 via a synchronous belt 31.

[0039] Using the above scheme, after the food undergoes visual inspection, it enters the screening unit 4. The food is conveyed by the first roller 22 and the second roller 23. During the food conveying process, undersized food and empty food bags fall through the pre-set gap between the first roller 22 and the second roller 23 into the collection box below for collection. Food that meets the size requirements is conveyed by the first roller 22 and the second roller 23 into the next process. Undersized food and empty food bags can be rejected, reducing the number of operation steps in the next process and effectively improving the quality of detection and screening.

[0040] For details, please refer to Figure 2 The bracket 21 has a strip groove 28, and a movable block 29 is slidably installed in the strip groove 28. The movable block 29 has a threaded hole on its side, and a locking bolt 30 is threaded in the threaded hole. The locking bolt 30 can lock the movable block 29 in the strip groove 28. The first roller shaft 22 is rotatably installed on the side of the movable block 29.

[0041] It should be noted that in this embodiment, a washer 39 is slidably sleeved on the locking bolt 30. When the locking bolt 30 is tightened, the washer is in close contact with the side wall of the bracket 21, which can restrict the sliding of the movable block 29 in the strip groove 28. When the locking bolt 30 is loosened, the washer and the bracket 21 are no longer in close contact, and the movable block 29 can move within the strip groove 28. At this time, the first roller shaft 22 can be pushed, making it convenient for the user to adjust the position of the first roller shaft 22. After the adjustment is completed, the timing belt 31 may be replaced or adjusted as needed.

[0042] Using the above solution, when it is necessary to adjust the gap between the first roller shaft 22 and the second roller shaft 23, the locking bolt 30 is loosened to release the fixation of the movable block 29, and the first roller shaft 22 is pushed, which drives the movable block 29 to move linearly along the strip groove 28. This allows the distance between the first roller shaft 22 and the second roller shaft 23 to be adjusted, enabling the screening of various sizes of food and effectively improving the applicability of the device.

[0043] For example, see Figure 1 and Figure 3 A diversion mechanism is provided on bracket 21; The diversion mechanism includes an electric push rod 32, an electric slide table 33, and a guide plate 34. The electric slide table 33 is fixedly mounted on the bracket 21, the electric push rod 32 is fixedly mounted on the sliding block of the electric slide table 33, the guide plate 34 is fixedly mounted on the bracket 21, and the telescopic end of the electric push rod 32 is provided with a material feeding plate 35. A second conveyor belt 36 is provided on the bracket 21. The second conveyor belt 36 is located below the electric push rod 32. The guide plate 34 is located on the second conveyor belt 36. A third motor 37 is fixedly installed on the bracket 21. A rotating plate 38 is provided at the output end of the third motor 37. The rotating plate 38 is located at the discharge port of the guide plate 34. The third motor 37 is fixedly installed on the bracket 21.

[0044] Using the above scheme, after the food is screened, the first roller 22 and the second roller 23 feed it onto the second conveyor belt 36. At this time, the electric pusher and the electric slide table 33 move according to the data detected by the detection mechanism 2, and move the unqualified food to the channel position formed by the guide plate 34. The food enters the channel and is transported to the position of the rotating plate 38. After falling onto the rotating plate 38, the third motor 37 works, driving the rotating plate 38 to flip and fall into the unqualified product collection box. The qualified products are transported to the qualified product collection box by the guide trough at the discharge of the second conveyor belt 36. The qualified and unqualified foods can be separated and collected separately, which can effectively prevent confusion after visual inspection of food and effectively improve the quality of detection and screening.

[0045] In summary, the working principle of this application is as follows: When visually inspecting different foods, the first conveyor belt 5 feeds the food into the inspection mechanism 2. During this process, the first motor 7 drives the two calibration plates 10 to move relative to each other, adjusting the distance between the rollers 11 and the food. This allows the rollers 11 to guide the food, which can adapt to various food sizes without frequent component replacement. It can also forcefully calibrate disordered food postures, such as correcting the sideways movement of blocky foods and the crossing of strip-shaped foods. This provides a stable foundation for the subsequent inspection mechanism 2. At the same time, the springs 13 can buffer and compensate for slight deviations during the conveying process to ensure calibration consistency. The close contact between the rollers 11 and the food reduces slippage, allowing the food to move smoothly with the conveying rhythm and avoiding the impact of jamming on the overall screening efficiency. This can effectively improve the applicability of the device, allowing the calibration parts to meet the position adjustment of various foods of different sizes, and making the food move in a linear arrangement. When the compression of the spring needs to be adjusted, the compression of the spring 13 can be changed by rotating the clamping bolt 18. The force can be matched and calibrated according to the hardness characteristics of the food, such as soft bread and hard nuts. This avoids the situation where the force is too small to effectively calibrate the posture or too large to damage the food. The same set of rollers 11 can be adjusted by the clamping bolt 18 to adapt to different elasticity requirements. It can be compatible with multiple types of food without replacing the spring 13, thus improving the applicability of the device. When the spring 13 becomes fatigued due to long-term use, the preload can be readjusted by the clamping bolt 18 to restore its performance, extend the service life of the component, reduce the frequency of replacement, and facilitate maintenance and adjustment. After visual inspection, the food enters the screening unit 4. The food is conveyed by the first roller 22 and the second roller 23. During the food conveying process, the food that is too small and the empty food bags fall into the collection box below through the preset gap between the first roller 22 and the second roller 23 for collection. Food that meets the size requirements is conveyed by the first roller 22 and the second roller 23 into the next process. The food that is too small and the empty food bags can be rejected, which can reduce the operation steps in the next process and effectively improve the detection and screening quality. When it is necessary to adjust the gap between the first roller shaft 22 and the second roller shaft 23, the locking bolt 30 is loosened to release the fixation of the movable block 29, push the first roller shaft 22, and drive the movable block 29 to move linearly along the strip groove 28, thereby adjusting the distance between the first roller shaft 22 and the second roller shaft 23. This allows for the screening of various sizes of food and effectively improves the applicability of the device. After the food is screened, the first roller 22 and the second roller 23 feed it onto the second conveyor belt 36. At this time, the electric pusher and the electric slide table 33 move according to the data detected by the detection mechanism 2, and move the unqualified food to the channel formed by the guide plate 34. The food enters the channel and is transported to the position of the rotating plate 38. After falling onto the rotating plate 38, the third motor 37 works, driving the rotating plate 38 to flip and fall into the unqualified product collection box. The qualified products are transported to the qualified product collection box by the guide trough at the discharge of the second conveyor belt 36. The qualified and unqualified foods can be separated and collected separately, which can effectively prevent confusion after visual inspection of food and effectively improve the quality of detection and screening.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A food sorting device based on visual inspection, characterized in that, This includes screening and testing facilities; The testing facility is used for visual inspection of food. The detection mechanism is installed on the screening assembly; The screening mechanism includes a conveying component and a screening component. The detection mechanism is installed on the conveying component, and the screening component is installed at the discharge end of the conveying component. The conveyor is used to correct the position of the food. The screening component is used to remove defective products.

2. The food sorting device based on visual inspection according to claim 1, characterized in that: The conveying component includes a first conveyor belt and an adjustment assembly disposed on the first conveyor belt; The first conveyor belt is used to transport food. The detection mechanism is fixedly installed on the first conveyor belt; The adjustment assembly includes a guide and a calibrator, the guide being used to adjust the position of the calibrator, and the calibrator being mounted on the guide; The calibration device is used to align the food item. The guide includes a guide rail and a first motor, as well as a lead screw rotatably mounted in the guide rail. The output end of the first motor is connected to the lead screw in a transmission connection. Two sets of sliders are threaded onto the lead screw, and the calibration component is mounted on the sliders. As the lead screw rotates, the two sliders move relative to each other along the guide rail.

3. The food sorting device based on visual inspection according to claim 2, characterized in that: The calibration component includes a calibration plate and a roller. The calibration plate is fixedly mounted on the slider, and a buffer is installed on the side of the calibration plate. The roller is rotatably mounted on the buffer. The surface of the roller is provided with a silicone layer, and the surface of the silicone layer is provided with a knurled pattern.

4. The food sorting device based on visual inspection according to claim 3, characterized in that: The buffer component includes a spring, a movable tube, and a sleeve. The spring is fixedly sleeved on the sleeve, the movable tube is slidably mounted on the sleeve, one end of the spring is fixedly connected to the movable tube, the sleeve is fixedly mounted on the side of the calibration plate, and the roller is rotatably mounted on the end of the movable tube away from the calibration plate.

5. A food sorting device based on visual inspection according to claim 4, characterized in that: The movable tube is equipped with a clamping component, which includes a fixed tube disposed inside the movable tube. A threaded tube is slidably installed inside the fixed tube, and a clamping bolt is threadedly installed inside the threaded tube. The clamping bolt passes through the calibration plate and the sleeve, and the nut of the clamping bolt can abut against the side of the calibration plate. A guide block is provided on the side wall of the threaded tube, and a guide groove is formed on the inner wall of the fixed tube to slide with the guide block.

6. A food sorting device based on visual inspection according to claim 2, characterized in that: The screening component includes a support, a first roller shaft, and a second roller shaft. The first roller shaft is slidably mounted on the support, and the second roller shaft is rotatably mounted on the support. A second motor is fixedly mounted on the support, and the second motor is connected to the first roller shaft and the second roller shaft via a transmission component. One end of the bracket is fixedly installed on the bracket of the first conveyor belt.

7. A food sorting device based on visual inspection according to claim 6, characterized in that: The transmission component includes a driving wheel and a driven wheel. The driving wheel is driven to the output shaft of the second motor, and the driven wheel is driven to the first roller shaft and the second roller shaft. The driving wheel is driven to the driven wheel via a synchronous belt.

8. A food sorting device based on visual inspection according to claim 7, characterized in that: The bracket has a strip groove, and a movable block is slidably installed in the strip groove. The movable block has a threaded hole on its side, and a locking bolt is threaded in the threaded hole. The locking bolt can lock the movable block in the strip groove. The first roller shaft is rotatably installed on the side of the movable block.

9. A food sorting device based on visual inspection according to claim 8, characterized in that: The support is equipped with a flow-diverting mechanism, which includes an electric push rod, an electric slide table, and a flow guide plate. The electric slide table is fixedly installed on the support, the electric push rod is fixedly installed on the sliding block of the electric slide table, and the flow guide plate is fixedly installed on the support. The telescopic end of the electric push rod is equipped with a material-pulling plate.

10. A food sorting device based on visual inspection according to claim 9, characterized in that: A second conveyor belt is provided on the support frame, and the second conveyor belt is located below the electric push rod. The guide plate is located on the second conveyor belt. A third motor is fixedly installed on the support frame. A rotating plate is provided at the output end of the third motor. The rotating plate is located at the discharge port of the guide plate. The third motor is fixedly installed on the support frame.

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