Novel fresh leaf color sorter

Abstract

The invention belongs to the technical field of tea color sorting, and particularly relates to a novel fresh leaf color sorter which comprises a workbench, a lower sorting box and an upper sorting box, a conveying belt is arranged at the top of the workbench and driven by a conveying motor, the lower sorting box is fixed to the workbench and located under the output tail end of the conveying belt, and the upper sorting box is fixed to the workbench and located under the lower sorting box. A light changing background lamp is arranged in the lower sorting box, an obliquely-arranged background plate is fixed to the top of the lower sorting box, the upper sorting box is fixed to the workbench and located above the output tail end of the conveying belt, a camera and two light supplementing lamps are arranged in the upper sorting box, and the camera is fixed to the center of the lower surface of a top plate of the upper sorting box. According to the tea leaf sorting device, the carding assembly is arranged, fresh leaves are carded through the carding rollers when being conveyed on the conveying belt, through physical carding of comb teeth, tea leaves which are adhered can be separated, the caking phenomenon is reduced, single-layer distribution of the tea leaves is more uniform in the subsequent color sorting process, and the color sorting precision is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tea color sorting, and in particular relates to a new fresh leaf color sorter. Background Art

[0002] Tea color sorting is a process of automatically sorting tea using optical recognition technology, mainly used to improve the quality of tea, remove impurities, and achieve grade classification. The color sorter collects the color, shape, and texture information of the tea surface through a high-resolution camera or spectral sensor, and combines with an AI algorithm to identify qualified products and defective products (such as yellow leaves, stems, impurities, etc.). After identifying unqualified products, the system triggers a high-speed air nozzle to accurately remove the defective parts and retain high-quality tea.

[0003] After retrieval, Chinese Patent Publication No. CN111408553B discloses a new type of tea color sorter, including a machine frame and a vibrating sieve hopper, a front upper sorting box, a front lower sorting box, a rear sorting box, and two rear discharge hoppers arranged on the machine frame. Through a clever design, the finished products mixed with waste and the waste mixed with a small amount of finished products are screened on one color sorter.

[0004] The existing device still has the following deficiencies:

[0005] 1. Fresh leaves are light and easy to break. After the fresh leaf cells are broken, pectin combines with tea polyphenols to form a gel-like substance, enhancing the viscosity of the leaves. Therefore, when sorting fresh leaves, the fresh leaves often form clusters, affecting the color sorting accuracy.

[0006] 2. Due to the easy clustering of fresh leaves, the discharge hopper is blocked during the feeding process of fresh leaves, affecting the efficiency of fresh leaf color sorting. Summary of the Invention

[0007] The purpose of the present invention is to provide a new fresh leaf color sorter for the problems proposed in the above background art.

[0008] To achieve the above purpose, the present invention adopts the following technical solutions: A new fresh leaf color sorter, including:

[0009] A workbench, on the top of which there is a conveyor belt driven by a conveyor motor;

[0010] A lower sorting box, which is fixed on the workbench and is directly below the output end of the conveyor belt. There is a variable light background lamp in the lower sorting box, and an inclined background plate is fixed on the top of the lower sorting box;

[0011] Upper sorting box, the upper sorting box is fixed on the workbench and located above the output end of the conveyor belt. There is a camera and two supplementary lights in the upper sorting box. The camera is fixed at the center of the lower surface of the top plate of the upper sorting box, and the two supplementary lights are respectively fixed on the two side walls of the upper sorting box. There is a spray valve at the bottom of the upper sorting box, and a control panel is provided on the side wall of the upper sorting box away from the conveyor belt.

[0012] Furthermore, the background board is a light-transmitting background board. The side wall of the upper sorting box close to the conveyor belt is arranged parallel to the background board, and the side wall of the upper sorting box close to the conveyor belt is made of tempered glass. The central axis of the camera is perpendicular to the plane where the background board is located.

[0013] Furthermore, a receiving hopper is fixed on the workbench. The receiving hopper is located below the upper sorting box. After the fresh leaves break away from the end of the conveyor belt, they are thrown out in a parabola and fall into the receiving hopper. There are a finished product outlet and an impurity outlet at the bottom of the receiving hopper.

[0014] Furthermore, a combing assembly is provided above the conveyor belt. The combing assembly includes two symmetrically arranged baffle plates fixed above the conveyor belt. Arc-shaped grooves are provided on both baffle plates. Two arc-shaped slide rails are fixed on both sides of the arc-shaped grooves. Sliders are detachably fixed on the two arc-shaped slide rails through fastening screws. A rotating shaft is rotatably connected between the two sliders. A combing roller is provided on the rotating shaft, and a driving motor for driving the combing roller to rotate is provided on the baffle plate.

[0015] Furthermore, a support plate is fixed above the baffle plate, and both the conveyor motor and the driving motor are fixed on the support plate.

[0016] Furthermore, a feeding hopper is fixed on the baffle plate, and the outlet of the feeding hopper is located above the input end of the conveyor belt.

[0017] Furthermore, an arc-shaped protrusion is provided on the side wall of the feeding hopper. A regulating shaft is rotatably connected inside the arc-shaped protrusion. One end of the regulating shaft penetrates through the side wall of the feeding hopper and extends to the outside of the feeding hopper. A regulating handle is fixed at the end of the regulating shaft outside the feeding hopper, and a regulating plate for regulating the size of the outlet of the feeding hopper is fixed on the regulating shaft.

[0018] Furthermore, a plurality of threaded holes are provided on the arc-shaped slide rail, and the plurality of threaded holes are arrayed around the central axis of the driving motor.

[0019] Compared with the existing technology, the advantages of the present invention are:

[0020] 1. The present invention sets up a combing component. When the fresh leaves are transported on the conveyor belt, the fresh leaves are combed by the combing roller. Through the physical combing of the comb teeth, the tea leaves that are adhered can be separated, the caking phenomenon can be reduced, so that the tea leaves are more evenly distributed in a single layer during subsequent color sorting, and the color sorting accuracy is improved.

[0021] 2. The present invention sets up an arc-shaped groove and an arc-shaped slide rail. There are a plurality of threaded holes on the arc-shaped slide rail. By installing the slider at different threaded holes, the height of the combing roller can be adjusted to be suitable for color sorting of different types of tea leaves. For example, when color sorting loose Pu'er tea, the combing roller is raised to retain its fluffiness, and when color sorting Biluochun tea, the combing roller is lowered to maintain its curly shape.

[0022] 3. The present invention sets up an adjusting plate. By changing the inclination angle of the adjusting plate, the size of the discharge port of the feeding hopper can be changed, thereby changing the flow rate of the discharge port, avoiding the stacking of fresh leaves on the conveyor belt due to excessive flow rate at the discharge port, and enabling the fresh leaves to be laid flat on the conveyor belt in a single layer, further improving the color sorting accuracy.

[0023] 4. When the feeding hopper is blocked, the discharge port of the feeding hopper can be appropriately enlarged by rotating the adjusting handle to make the agglomerated fresh leaves fall, and then the adjusting handle is turned back. In case of serious blockage, the adjusting handle can be rotated back and forth to make the adjusting plate swing back and forth to preliminarily break up the agglomerated fresh leaves so that they can fall normally, thereby solving the problem of blockage of the feeding hopper. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall structural schematic diagram of a novel fresh leaf color sorter provided by the present invention Figure 1 ;

[0025] Figure 2 is the overall top view structural schematic diagram of a novel fresh leaf color sorter provided by the present invention;

[0026] Figure 3 is the overall structural schematic diagram of a novel fresh leaf color sorter provided by the present invention Figure 2 ;

[0027] Figure 4 is Figure 3 the enlarged view at position A in

[0028] Figure 5 is Figure 3 the enlarged view at position B in

[0029] Figure 6 is Figure 2 the cross-sectional view in the A-A direction in

[0030] In the figure, 1 is the workbench, 11 is the conveyor belt, and 12 is the conveyor motor;

[0031] Lower sorting box 3, variable-light background lamp 31, background board 32;

[0032] Upper sorting box 2, control panel 20, camera 21, supplementary light 22, spraying valve 23;

[0033] Feeding hopper 4, finished product material outlet 41, impurity material outlet 42;

[0034] Baffle 51, arc groove 52, arc slide rail 53, slider 54, rotating shaft 55, carding roller 551, driving motor 56, support plate 511, fastening screw 531, threaded hole 532;

[0035] Discharge hopper 61, arc protrusion 62, adjusting shaft 63, adjusting plate 64, adjusting handle 631. Specific embodiments

[0036] The following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0037] As Figures 1-6 shown, a new type of fresh leaf color sorter includes a workbench 1, a lower sorting box 3 and an upper sorting box 2. A conveyor belt 11 is provided on the top of the workbench 1, and the conveyor belt 11 is driven by a conveyor motor 12. Specifically, the output shaft of the conveyor motor 12 and the drive shaft of the conveyor belt 11 are connected by a pulley and a belt. A protective shell is provided outside the pulley and the belt;

[0038] The lower sorting box 3 is fixed on the workbench 1 and is located directly below the output end of the conveyor belt 11. A variable-light background lamp 31 is provided inside the lower sorting box 3. An inclined background board 32 is fixed on the top of the lower sorting box 3. The background board 32 is a light-transmitting background board. The side wall of the upper sorting box 2 close to the conveyor belt 11 is arranged parallel to the background board 32, and the side wall of the upper sorting box 2 close to the conveyor belt 11 is made of tempered glass. The central axis of the camera 21 is perpendicular to the plane where the background board 32 is located. During specific operation, the color of the variable-light background lamp 31 can be adjusted according to different selected materials, so that the background board 32 uses a more suitable color as the background, making the materials and impurities present two or even multiple completely different images, so as to improve the color sorting accuracy;

[0039] The upper sorting box 2 is fixed on the workbench 1 and is located above the output end of the conveyor belt 11. A camera 21 and two supplementary lights 22 are provided inside the upper sorting box 2. The camera 21 is fixed at the center of the lower surface of the top plate of the upper sorting box 2. The two supplementary lights 22 are respectively fixed on the two side walls of the upper sorting box 2. A spraying valve 23 is provided at the bottom of the upper sorting box 2. A control panel 20 is provided on the side wall of the upper sorting box 2 away from the conveyor belt 11. During specific operation, the brightness of the color sorting environment is improved by the supplementary lights 22, the clarity of the camera imaging is improved, and the color sorting effect is improved;

[0040] A receiving hopper 4 is fixed on the workbench 1. The receiving hopper 4 is located below the upper sorting box 2. After the fresh leaves are separated from the end of the conveyor belt 11, they are thrown in a parabola and fall into the receiving hopper 4. The bottom of the receiving hopper 4 is provided with a finished product outlet 41 and an impurity outlet 42. During specific operation, when the camera captures the position of an abnormal color, the corresponding spray holes on the spray valve 23 are controlled by the PLC controller to spray the abnormal object into the impurity outlet 42, and the remaining normal tea leaves fall into the finished product outlet 41 along the parabola;

[0041] Above the conveyor belt 11, there is a combing assembly. The combing assembly includes two symmetrically arranged baffle plates 51 fixed above the conveyor belt 11. The baffle plates 51 can prevent the fresh leaves from slipping off the side of the conveyor belt 11, reducing tea leaf waste. Above the baffle plates 51, there is a support plate 511 fixed. The conveyor motor 12 and the driving motor 56 are both fixed on the support plate 511. Both baffle plates 51 are provided with arc-shaped grooves 52. On both sides of the arc-shaped grooves 52, there are two arc-shaped slide rails 53. There are multiple threaded holes 532 on the arc-shaped slide rails 53. The multiple threaded holes 532 are arranged in an array with the central axis of the driving motor 56 as the center of the circle. Two sliders 54 are detachably fixed on the two arc-shaped slide rails 53 through fastening screws 531. A rotating shaft 55 is rotatably connected between the two sliders 54. A combing roller 551 is provided on the rotating shaft 55. By installing the slider 54 in different threaded holes 532, the height of the combing roller 551 can be adjusted to make the device suitable for the color sorting of different types of tea leaves. For example, when color sorting loose Pu-erh tea, the combing roller is raised to retain its fluffiness, and when color sorting Biluochun, the combing roller is lowered to maintain its curly shape. A driving motor 56 for driving the combing roller 551 to rotate is provided on the baffle plate 51. Specifically, the output shaft of the driving motor 56 and the rotating shaft 55 are connected by a belt pulley and a belt, and a protective shell is provided outside the belt pulley and the belt;

[0042] A blanking hopper 61 is fixed on the baffle plate 51. The outlet of the blanking hopper 61 is located above the input end of the conveyor belt 11. An arc-shaped protrusion 62 is provided on the side wall of the blanking hopper 61. An adjusting shaft 63 is rotatably connected inside the arc-shaped protrusion 62. One end of the adjusting shaft 63 outside the blanking hopper 61 is fixed with an adjusting handle 631. One end of the adjusting shaft 63 penetrates through the side wall of the blanking hopper 61 and extends outside the blanking hopper 61. An adjusting plate 64 for adjusting the size of the outlet of the blanking hopper 61 is fixed on the adjusting shaft 63. During specific operation, the inclination angle of the adjusting plate 64 is adjusted according to the shape and size of the fresh leaves, so as to change the size of the outlet of the blanking hopper 61, enabling the fresh leaves to be laid flat in a single layer on the conveyor belt 11, avoiding stacking of fresh leaves on the conveyor belt 11, and improving the color sorting accuracy.

[0043] The working principle of the present invention is as follows:

[0044] During operation, the operator adjusts the height of the combing roller 551 according to the type of fresh leaves to be color-sorted. When adjusting, first remove the protective shell to expose the fastening screw 531, then remove the fastening screw 531, push the slider 54 along the arc-shaped slide rail 53, and when the combing roller 551 is at an appropriate height, screw the fastening screw 531 into the corresponding threaded hole 532, and then install and fix the protective shell to complete the adjustment of the height of the combing roller 551;

[0045] After the height adjustment of the combing roller 551 is completed, the operator adjusts the size of the discharge port of the feeding hopper 61 according to the shape and size of the tea leaves to be selected. Rotate the adjustment handle 631 to drive the adjustment shaft 63 to rotate, thereby driving the adjustment plate 64 to rotate to change the inclination angle of the adjustment plate 64, realizing the adjustment of the size of the discharge port of the feeding hopper 61, and adjusting the size of the discharge port of the feeding hopper 61 so that the fresh leaves are evenly spread in a single layer on the surface of the conveyor belt 11 after falling onto the conveyor belt 11;

[0046] After the adjustment work is completed, the operator first turns on the variable-light background lamp 31 through the control panel 20 and adjusts the light color of the variable-light background lamp 31 according to the color of the fresh leaves, and then turns on the conveyor motor 12, the drive motor 56, and the supplementary light 22. The conveyor motor 12 drives the conveyor belt 11 to operate, the drive motor 56 drives the combing roller 551 to operate, and then pours the fresh leaves to be selected into the feeding hopper 61;

[0047] After the fresh leaves enter the feeding hopper 61, they evenly fall from the discharge port of the feeding hopper 61 onto the conveyor belt 11. The conveyor belt 11 conveys the fresh leaves. When passing under the combing roller 551, the combing roller 551 combs the fresh leaves, separates the adhered fresh leaves, makes the fresh leaves more evenly distributed in a single layer during subsequent color sorting of fresh leaves, and improves the color sorting accuracy;

[0048] After the fresh leaves are conveyed to the end of the conveyor belt 11, they fall in a parabola from the end of the conveyor belt 11. The camera 21 takes pictures of the falling fresh leaves and extracts the color model. The tea leaves with normal color fall into the finished product hopper 41 along the parabola. When the camera 21 captures an abnormal color, it transmits the position information of the abnormal color to the PLC controller. The PLC controller controls the spray holes corresponding to the abnormal color position on the spray valve 23 to open, and blows the objects with abnormal color into the impurity hopper 42;

[0049] When the feeding hopper 61 is blocked, the operator can appropriately enlarge the discharge port of the feeding hopper 61 by rotating the adjustment handle 631 to make the agglomerated fresh leaves fall, and then turn the adjustment handle 631 back. In case of serious blockage, the adjustment handle 631 can be rotated back and forth to make the adjustment plate 64 swing back and forth, preliminarily disperse the agglomerated fresh leaves, and make them fall normally, thus solving the problem of blockage of the feeding hopper 61.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A new type of fresh leaf color sorter, characterized in that: include: A workbench (1), wherein a conveyor belt (11) is provided on the top of the workbench (1), and the conveyor belt (11) is driven by a conveying motor (12); A lower sorting box (3), the lower sorting box (3) is fixed on the workbench (1) and is located directly below the output end of the conveyor belt (11), a dimming background light (31) is provided inside the lower sorting box (3), and an inclined background plate (32) is fixed on the top of the lower sorting box (3); An upper sorting box (2) is fixed on a workbench (1) and is located above the output end of a conveyor belt (11). A camera (21) and two fill-in lights (22) are provided inside the upper sorting box (2). The camera (21) is fixed at the center of the lower surface of a top plate of the upper sorting box (2). The two fill-in lights (22) are respectively fixed on two side walls of the upper sorting box (2). A spray valve (23) is provided at the bottom of the upper sorting box (2). A control panel (20) is provided on the side wall of the upper sorting box (2) away from the conveyor belt (11).

2. A new fresh leaf color sorter according to claim 1, characterized in that: The background plate (32) is a light-transmitting background plate, the side wall of the upper sorting box (2) close to the conveyor belt (11) is arranged parallel to the background plate (32), and the side wall of the upper sorting box (2) close to the conveyor belt (11) is made of tempered glass, and the central axis of the camera (21) is perpendicular to the plane where the background plate (32) is located.

3. A new fresh leaf color sorter according to claim 1, characterized in that: A receiving hopper (4) is fixed on the workbench (1), and the receiving hopper (4) is located below the upper sorting box (2). After the fresh leaves are separated from the end of the conveyor belt (11), they are thrown out in a parabolic trajectory and fall into the receiving hopper (4). The bottom of the receiving hopper (4) is provided with a finished product material port (41) and an impurity material port (42).

4. A new fresh leaf color sorter according to claim 2, characterized in that: A combing assembly is provided above the conveyor belt (11), and the combing assembly comprises two symmetrically arranged material baffle plates (51) fixed above the conveyor belt (11), the two material baffle plates (51) are both provided with an arc groove (52), two arc slide rails (53) are fixed on both sides of the arc groove (52), sliders (54) are detachably fixed on the two arc slide rails (53) by means of fastening screws 531, a rotating shaft (55) is rotatably connected between the two sliders (54), a combing roller (551) is provided on the rotating shaft (55), a driving motor (56) for driving the combing roller (551) to rotate is provided on the material baffle plate (51), and the center of the arc slide rail (53) is located on the central axis of the driving motor (56).

5. A new fresh leaf color sorter according to claim 4, characterized in that: A support plate (511) is fixed above the material blocking plate (51), and the conveying motor (12) and the driving motor (56) are both fixed on the support plate (511).

6. A new fresh leaf color sorter according to claim 4, characterized in that: A lower hopper (61) is fixed on the baffle plate (51), and a discharge port of the lower hopper (61) is located above the input end of the conveyor belt (11).

7. A new fresh leaf color sorter according to claim 6, characterized in that: An arc-shaped protrusion (62) is provided on the side wall of the lower hopper (61), an adjusting shaft (63) is rotatably connected inside the arc-shaped protrusion (62), one end of the adjusting shaft (63) passes through the side wall of the lower hopper (61) and extends to the outside of the lower hopper (61), an adjusting handle (631) is fixed to the end of the adjusting shaft (63) outside the lower hopper (61), and an adjusting plate (64) for adjusting the size of the discharge port of the lower hopper (61) is fixed on the adjusting shaft (63).

8. A new fresh leaf color sorter according to claim 4, characterized in that: The arc-shaped slide rail (53) is provided with a plurality of threaded holes (532), and the plurality of threaded holes (532) are distributed in an array with the central axis of the driving motor (56) as the center.

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