Tobacco leaf grading and sorting device

Abstract

A tobacco leaf grading and sorting device comprises a machine body, a recognition unit, a material blocking unit and a caching unit. Multiple groups of high-speed conveying belts are linearly arrayed at the top of the machine body, a blanking gap is formed between every two high-speed conveying belts, and a discharging conveying belt is further arranged at the bottom of the machine body; the identification unit comprises a first visual camera mounted above the high-speed conveying belt; the multiple material blocking units are installed above the high-speed conveying belt and correspond to the multiple material falling gaps in a one-to-one mode. The multiple temporary storage units are installed between the high-speed conveying belt and the discharging conveying belt and correspond to the multiple blanking gaps in a one-to-one mode. The first visual camera grades tobacco leaves on the high-speed conveying belts and then sends signals to control the multiple material blocking units to independently operate to block the corresponding material falling gaps, so that the tobacco leaves of the corresponding grades fall into the corresponding cache units through the material falling gaps when passing through the multiple sets of high-speed conveying belts, and the multiple cache units are opened after being full of the tobacco leaves. And the tobacco leaves of the same level fall onto the discharging conveying belt.

Description

Technical Field

[0001] The utility model belongs to the technical field of tobacco production equipment, in particular to a tobacco grading and sorting device. Background Art

[0002] In the tobacco production process, the bundles of tobacco leaves after baking need to be sorted and identified piece by piece in order to grade the tobacco leaves. After the grading is completed, the tobacco leaves of the same grade are collected uniformly for subsequent processing and production. In this industry, tobacco leaves are usually sorted and collected manually, but different people have different judgment standards, which leads to errors in the actual grading results of tobacco leaves, and the manual collection of tobacco leaves is prone to errors.

[0003] To solve this problem, grading and sorting production lines have appeared on the market. They grade the conveyed tobacco leaves one by one by setting a visual identifier above the conveyor belt, and transfer tobacco leaves of the same grade to the corresponding receiving boxes by setting a robot beside the conveyor belt. The degree of automation is high. However, it was found in actual use that the robot can only transfer one tobacco leaf at a time, the work efficiency is low, and after the receiving box is full, it still needs to be replaced manually, and the convenience of use is poor. Utility Model Content

[0004] Technical issues solved

[0005] The utility model provides a tobacco leaf grading and sorting device, which can collect multiple tobacco leaves of different grades at the same time, thereby improving work efficiency, and does not require manual replacement of a receiving box, thereby improving convenience of use.

[0006] Technical Solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A tobacco leaf grading and sorting device comprises a machine body, an identification unit, a material blocking unit and a buffer unit; the machine body has a plurality of groups of high-speed conveyor belts in a linear array on the top, and there are material drop gaps between the two high-speed conveyor belts, and a material discharge conveyor belt is also provided at the bottom of the machine body; the identification unit comprises a first visual camera, and the first visual camera is installed above the high-speed conveyor belt on the front side of the machine body; there are a plurality of material blocking units, and the plurality of material blocking units are installed above the high-speed conveyor belt, and the plurality of material blocking units correspond to the plurality of material drop gaps one by one; there are a plurality of buffer units, and the plurality of buffer units are installed on the machine body and located between the high-speed conveyor belt and the material discharge conveyor belt, and the plurality of buffer units correspond to the plurality of material drop gaps one by one;

[0009] Among them, after the first visual camera identifies and grades the tobacco leaves on the high-speed conveyor belt, it sends a signal to control the multiple material blocking units to operate independently to block the corresponding material drop gaps, so that when the tobacco leaves of corresponding grades pass through multiple groups of the high-speed conveyor belts, they fall into the corresponding cache units through each material drop gap. After the multiple cache units are full of tobacco leaves, they can be opened to allow tobacco leaves of the same grade to fall onto the discharge conveyor belt in a concentrated manner.

[0010] Preferably, the material blocking unit includes a first fixed frame, a baffle and a first driving unit, the first fixed frame is installed above the high-speed conveyor belt and is located next to the material dropping gap; the first driving unit is installed on the first fixed frame and is connected to the baffle driving to drive the baffle away from or close to the material dropping gap; wherein, the first visual camera is electrically connected to the first driving unit to control the baffle to block or release the tobacco leaves on the high-speed conveyor belt through the first driving unit, and when the tobacco leaves are blocked by the baffle, they fall into the corresponding cache unit through the material dropping gap.

[0011] Preferably, it also includes a flipping unit, which includes a second fixed frame, a shovel plate and a second driving unit; the second fixed frame is installed above the high-speed conveyor belt on the front side of the machine body; the bottom end of the shovel plate is designed to be arc-shaped and gradually deviates from the conveying direction of the high-speed conveyor belt; the second driving unit is installed on the second fixed frame and is connected to the top end of the shovel plate to drive the shovel plate away from or contact the belt body of the high-speed conveyor belt; the first visual camera is located between the material blocking unit and the flipping unit.

[0012] Preferably, an arc angle α is formed between the top end of the shovel plate and the bottom end of the shovel plate, and 5°≤α≤25°.

[0013] Preferably, a cushion strip is installed at the bottom edge of the shovel plate, and the shovel plate can contact the belt body of the high-speed conveyor belt through the cushion strip.

[0014] Preferably, the shovel plate is made of stainless steel, and the cushion strip is made of flexible plastic.

[0015] Preferably, the first driving part includes a bracket, a guide block, a connecting block and a servo motor; the bracket is mounted on the first fixed frame and is vertically provided with a guide rail, and two rotating wheels are rotatably mounted on the bracket, and belts are wound around the rotating wheels; the guide block is mounted on the baffle and is slidably connected to the guide rail, and the connecting block is fixed to the guide block and the baffle; the servo motor is mounted on the bracket and is drivingly connected to any of the rotating wheels to drive the baffle away from or close to the blanking gap; the second driving part has the same structure as the first driving part.

[0016] Preferably, the identification unit also includes a second visual camera, which is installed above the high-speed conveyor belt on the front side of the machine body and located in front of the flipping unit, and the second visual camera is also electrically connected to the second driving unit to control the shovel plate to flip or release the tobacco leaves on the high-speed conveyor belt through the second driving unit.

[0017] Preferably, the identification unit also includes a lamp stand, which is mounted on the machine body, and a lamp body is rotatably mounted on the lamp stand, and the lamp body is damping-coordinated with the lamp stand; the lamp stand is provided with two and is respectively mounted on the sides of the first visual camera and the second visual camera, so that the two lamp bodies can illuminate the tobacco leaves on the high-speed conveyor belt accordingly.

[0018] Preferably, a cover is also installed on the machine body, and the cover encloses the recognition unit, the flip unit and the corresponding high-speed conveyor belt, and the first visual camera and the second visual camera are both installed in the cover.

[0019] Preferably, the cache unit includes a material receiving box, a movable part and a baffle, and the upper and lower ends of the material receiving box are respectively provided with a feed port connected to the material dropping gap and a discharge port facing the discharge conveyor belt; the material receiving box is provided with a slide rail, and the baffle can be slidably mounted on the slide rail to open or close the discharge port; the movable part is mounted on the material receiving box and is drivingly connected to the baffle to drive the baffle to move along the slide rail.

[0020] Preferably, the moving part includes a cylinder, a rack and a gear, the rack is mounted on the baffle and is parallel to the slide rail, the gear is rotatably mounted on the material receiving box and is meshingly connected to the rack, the cylinder is mounted on the material receiving box, and the telescopic end of the cylinder is fixedly connected to the baffle to drive the baffle to move along the slide rail.

[0021] Beneficial Effects

[0022] The utility model provides a tobacco grading and sorting device, which arranges multiple groups of high-speed conveyor belts at intervals on a machine body for conveying tobacco leaves, arranges material blocking units on the high-speed conveyor belts for blocking or releasing tobacco leaves, and arranges a first visual camera for identifying the grade of tobacco leaves and controlling the operating timing of the material blocking units, so that tobacco leaves of the same grade can pass through corresponding material gaps and be accumulated in corresponding buffer units, thereby realizing automatic sorting of tobacco leaves. Since the multiple groups of material blocking units are arranged on the same conveyor line and operate independently, multiple pieces of tobacco leaves of different grades can be collected at the same time, thereby improving work efficiency; and the tobacco leaves accumulated in different buffer units can be discharged onto the discharging conveyor belt after the buffer units are full, so as to be transferred to the next process. The whole process does not require workers to carry and replace, thereby improving convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 The overall structure of the utility model is shown Figure 1 ;

[0025] Figure 2 Shows Figure 1 The enlarged view of point A in the middle;

[0026] Figure 3 Shows Figure 1 Right view of;

[0027] Figure 4 Shows Figure 3 AA section view;

[0028] Figure 5 Shows Figure 4 The enlarged view of point A in the middle;

[0029] Figure 6 Shows Figure 4 The enlarged view of point B in the middle;

[0030] Figure 7 The overall structure of the utility model is shown Figure 2 ;

[0031] Figure 8 Shows Figure 7 Enlarged view of point C in the middle;

[0032] Fig. 9 Shows Figure 7 The enlarged view of point D in the middle;

[0033] Fig.10 The structure diagram of the material blocking unit of the utility model is shown in FIG. Figure 1 ;

[0034] Fig.11 The structure diagram of the material blocking unit of the utility model is shown in FIG. Figure 2 ;

[0035] Fig.12 The structure of the flip unit of the utility model is shown Figure 1 ;

[0036] Fig.13 The structure of the flip unit of the utility model is shown Figure 2 ;

[0037] Fig.14The structure diagram of the shovel plate of the utility model is shown;

[0038] Fig.15 The structure of the cache unit of the utility model is shown Figure 1 ;

[0039] Fig.16 The structure of the cache unit of the utility model is shown Figure 2 .

[0040] In the figure: 1 body, 11 high-speed conveyor belt, 110 drop gap, 12 discharge conveyor belt, 13 cover, 2 identification unit, 21 first visual camera, 22 second visual camera, 23 lamp holder, 230 lamp body, 3 blocking unit, 31 first fixed frame, 32 baffle, 33 first driving unit, 331 bracket, 3311 guide rail, 3312 rotating wheel, 3313 belt, 332 guide block, 333 connecting block, 334 servo motor, 4 cache unit, 41 material receiving box, 411 feed port, 412 discharge port, 41d slide rail, 42 moving part, 421 cylinder, 422 rack, 423 gear, 43 shield, 5 flip unit, 51 second fixed frame, 52 shovel plate, 520 pad, 53 second driving unit. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] See attached Figure 1 -Attached Fig.11 A tobacco leaf grading and sorting device comprises a body 1, an identification unit 2, a material blocking unit 3 and a buffer unit 4; a plurality of groups of high-speed conveyor belts 11 are arranged in a linear array on the top of the body 1, and a material drop gap 110 is provided between each pair of the high-speed conveyor belts 11, and a material discharge conveyor belt 12 is also provided at the bottom of the body 1; the identification unit 2 comprises a first visual camera 21, and the first visual camera 21 is installed above the high-speed conveyor belt 11 on the front side of the body 1; a plurality of material blocking units 3 are provided, and the plurality of material blocking units 3 are all installed above the high-speed conveyor belt 11, and the plurality of material blocking units 3 correspond to the plurality of material drop gaps 110 one by one; a plurality of buffer units 4 are provided, and the plurality of buffer units 4 are all installed on the body 1 and located between the high-speed conveyor belt 11 and the material discharge conveyor belt 12, and the plurality of buffer units 4 correspond to the plurality of material drop gaps 110 one by one; the first visual camera 21 can also send a control signal to the plurality of material blocking units 3 to drive the plurality of material blocking units 3 to block or release the tobacco leaves.

[0043] Specifically, for ease of understanding, the multiple drop gaps 110 on the machine body 1 are sequentially divided into a first drop gap 110, a second drop gap 110, and a third drop gap 110, and each drop gap 110 corresponds to a different grade of tobacco leaves;

[0044] When in use, tobacco leaves are placed one by one on the high-speed conveyor belt 11 located at the front side of the machine body 1. When the tobacco leaves pass through the first visual camera 21, the first visual camera 21 identifies and grades the tobacco leaves, and synchronously sends the grade information of the tobacco leaves to the multiple material blocking units 3;

[0045] Assuming that the first visual camera 21 recognizes that the tobacco leaves belong to the second level, the blocking unit 3 corresponding to the first drop gap 110 is controlled to release them normally. When the tobacco leaves of the second level move close to the second drop gap 110, the blocking unit 3 corresponding to the second drop gap 110 is controlled to block them, so that the tobacco leaves of the second level fall into the corresponding cache unit 4 through the second drop gap 110 for storage; and after the tobacco leaves of the second level enter the cache unit 4, the blocking unit 3 corresponding to the second drop gap 110 is quickly reset to release the tobacco leaves of other levels normally.

[0046] According to the above-mentioned operation mode, the first-level and third-level tobacco leaves can be stacked in the corresponding buffer units 4 respectively. When each buffer unit 4 is full of tobacco leaves, each buffer unit 4 is opened one by one, so that the tobacco leaves of the same level can fall onto the discharge conveyor belt 12 and be transferred to the next process via the discharge conveyor belt 12.

[0047] It should be noted that the material blocking unit 3 runs at high speed and is used in conjunction with the high-speed conveyor belt 11, that is, the process of blocking and releasing the tobacco leaves by the material blocking unit 3 is completed in an instant, which will not affect the normal operation of the high-speed conveyor belt 11.

[0048] In summary, the utility model arranges multiple groups of high-speed conveyor belts 11 at intervals on the body 1 for conveying tobacco leaves, arranges material blocking units 3 on the high-speed conveyor belts 11 for blocking or releasing tobacco leaves, and arranges a first visual camera 21 for identifying the grade of tobacco leaves and controlling the operating timing of the material blocking units 3, so that tobacco leaves of the same grade can pass through the corresponding material drop gaps 110 and accumulate in the corresponding buffer units 4, thereby realizing automatic sorting of tobacco leaves. Since the multiple groups of material blocking units 3 are arranged on the same conveyor line and operate independently, multiple pieces of tobacco leaves of different grades can be collected at the same time, thereby improving work efficiency; and the tobacco leaves accumulated in different buffer units 4 can be discharged onto the discharge conveyor belt 12 after the buffer units 4 are full, so as to be transferred to the next process. The whole process does not require workers to carry and replace, thereby improving convenience of use.

[0049] See attached Figure 2 -Attached Figure 5 and attached Fig. 9 -Attached Fig.11The material blocking unit 3 includes a first fixed frame 31, a baffle 32 and a first driving unit 33. The first fixed frame 31 is installed above the high-speed conveyor belt 11 and is located beside the material gap 110; the first driving unit 33 is installed on the first fixed frame 31 and is drivingly connected to the baffle 32 to drive the baffle 32 away from or close to the material gap 110; the first visual camera 21 is electrically connected to the first driving unit 33.

[0050] Specifically, when in use, the first visual camera 21 identifies and analyzes the grade information of the tobacco leaves, and controls the operating timing of each first driving unit 33 according to the grade information of the tobacco leaves, so as to control the baffle 32 through the first driving unit 33 to block or release the tobacco leaves on the high-speed conveyor belt 11. When the tobacco leaves are blocked by the baffle 32, they fall into the corresponding cache unit 4 through the drop gap 110.

[0051] See attached Figure 4 -Attached Figure 8 and attached Fig.11 -Attached Fig.14 , considering that when workers place tobacco leaves on the high-speed conveyor belt 11, some tobacco leaves may be in a state with the reverse side facing up, which will make the first visual camera 21 unable to accurately identify the data information of the tobacco leaves, resulting in errors in the grading results; to solve this problem, the utility model also includes a flipping unit 5, the flipping unit 5 includes a second fixed frame 51, a shovel plate 52 and a second driving unit 53; the second fixed frame 51 is installed above the high-speed conveyor belt 11 on the front side of the machine body 1; the bottom end of the shovel plate 52 is arc-shaped and gradually deviates from the conveying direction of the high-speed conveyor belt 11; the second driving unit 53 is installed on the second fixed frame 51 and is connected to the top end of the shovel plate 52 to drive the shovel plate 52 away from or contact the belt body of the high-speed conveyor belt 11; the first visual camera 21 is located between the material blocking unit 3 and the flipping unit 5.

[0052] Specifically, when in use, the cured tobacco leaves are placed one by one on the high-speed conveyor belt 11;

[0053] If the user sees that the tobacco leaves are facing up, the second driving unit 53 is not activated, so that the shovel plate 52 remains away from the high-speed conveyor belt 11, ensuring that the tobacco leaves can be smoothly moved to the first visual camera 21 for identification and grading;

[0054] If the user sees that the tobacco leaves are in a state where the back side is facing upward, the second driving unit 53 controls the shovel plate 52 to move down quickly to contact the belt body of the conveyor belt, so that one side of the tobacco leaves moves quickly to the curved surface of the shovel plate 52. At this time, the second driving unit 53 drives the shovel plate 52 to move up quickly, so as to lift one side of the tobacco leaves and drive the tobacco leaves to flip 180°. After flipping, the front side of the tobacco leaves faces upward and falls onto the high-speed conveyor belt 11. The high-speed conveyor belt 11 then continues to transport the tobacco leaves facing upward to the first visual camera 21 for identification and grading.

[0055] Therefore, the above design can flip and correct the tobacco leaves, ensuring that the tobacco leaves on the high-speed conveyor belt 11 always remain facing upward, so that the first visual camera 21 can normally identify and grade them, thereby improving the accuracy; and it should be noted that the second drive unit 53 runs quickly during use, so that the shovel plate 52 can contact and move away from the belt body of the high-speed conveyor belt 11 in an instant, ensuring that the shovel plate 52 will not hinder the normal operation of the high-speed conveyor belt 11.

[0056] See attached Fig.14 An arc angle α is formed between the top end of the shovel plate 52 and the bottom end of the shovel plate 52, 5°≤α≤25°; at this angle, one side of the tobacco leaf can move to the shovel plate 5223 more smoothly.

[0057] See attached Figure 1 -Attached Figure 7 A pad strip 520 is installed at the bottom edge of the shovel plate 52, and the shovel plate 52 can contact the belt body of the high-speed conveyor belt 11 through the pad strip 520.

[0058] Among them, the design of the pad 520 can prevent the shovel plate 52 from rigidly colliding with the belt body of the high-speed conveyor belt 11 and causing damage to it; further, the shovel plate 52 and the pad 520 can be made of a variety of materials, which is not limited in the utility model. For ease of understanding, in this embodiment, the shovel plate 52 is made of stainless steel and the pad 520 is made of flexible plastic.

[0059] See attached Fig.10 -Attached Fig.13 The first driving part 33 is of various types, for example, a mechanism with a stroke such as a screw motor can be used. For the convenience of understanding, in this embodiment, the first driving part 33 includes a bracket 331, a guide block 332, a connecting block 333 and a servo motor 334; the bracket 331 is installed on the first fixed frame 31 and is vertically provided with a guide rail 3311, and two rotating wheels 3312 are rotatably installed on the bracket 331, and a belt 3313 is wound around the rotating wheel 3312; the guide block 332 is installed on the baffle 32 and is slidably connected to the guide rail 3311, and the connecting block 333 is fixed to the guide block 332 and the baffle 32; the servo motor 334 is installed on the bracket 331 and is drivingly connected to any rotating wheel 3312 to drive the baffle 32 away from or close to the blanking gap 110; the second driving part 53 has the same structure as the first driving part 33.

[0060] Specifically, when in use, the servo motor 334 starts and stops according to the signal sent by the first visual camera 21. When the output shaft of the servo motor 334 rotates forward, the connecting block 333 is driven by the rotating wheel 3312 and the belt 3313, thereby driving the baffle 32 to move downward along the length direction of the guide rail 3311 and closer to the belt body of the high-speed conveyor belt 11; similarly, when the output shaft of the servo motor 334 rotates forward, the baffle 32 is driven to move up along the length direction of the guide rail 3311 and away from the belt body of the high-speed conveyor belt 11; the second drive unit 53 has the same result as the first drive unit 33 and the same working principle, which will not be further elaborated here.

[0061] See attached Figure 4 -Attached Figure 7 The identification unit 2 also includes a second visual camera 22, which is installed above the high-speed conveyor belt 11 on the front side of the body 1 and is located in front of the flip unit 5, and the second visual camera 22 is also electrically connected to the second driving unit 53 to control the shovel plate 52 to flip or release the tobacco leaves on the high-speed conveyor belt 11 through the second driving unit 53.

[0062] Specifically, the cured tobacco leaves are placed one by one on the high-speed conveyor belt 11. If the second visual camera 22 recognizes that the tobacco leaves are in a state where the front side is facing upward, the second drive unit 53 will not be started, so that the shovel plate 52 remains away from the high-speed conveyor belt 11, ensuring that this part of the tobacco leaves can be smoothly moved to the first visual camera 21 for identification and grading; if the second visual camera 22 recognizes that the tobacco leaves are in a state where the back side is facing upward, an operation instruction is sent to the second drive unit 53. When the tobacco leaves with the back side facing downward are close to the second visual camera 22, the second drive unit 53 controls the shovel plate 52 to move down quickly and contact the belt body of the conveyor belt, so that one side of the tobacco leaves moves quickly to the curved surface of the shovel plate 52. At this time, the shovel plate 52 is driven to move up quickly by the second drive unit 53, so that one side of the tobacco leaves can be lifted and the tobacco leaves can be driven to flip 180°.

[0063] Therefore, the design of the second visual camera 22 can automatically identify the front and back sides of the tobacco leaves, and thereby control the operation of the second driving unit 53, thereby realizing the automation of tobacco leaf correction and further improving work efficiency.

[0064] See attached Figure 4 -Attached Figure 7 The identification unit 2 also includes a lamp holder 23, which is mounted on the machine body 1, and a lamp body 230 is rotatably mounted on the lamp holder 23, and the lamp body 230 is damped with the bracket 331; the lamp holder 23 is provided with two and respectively mounted beside the first visual camera 21 and the second visual camera 22, so that the two lamp bodies 230 can illuminate the tobacco leaves on the high-speed conveyor belt 11 accordingly.

[0065] Specifically, when in use, the lamp body 230 is started to provide light to the high-speed conveyor belt 11, so that the tobacco leaves on the high-speed conveyor belt 11 can be clearly displayed, ensuring that the first visual camera 21 and the second visual camera 22 can clearly capture and identify the tobacco leaves, so as to determine whether the tobacco leaves are facing up and grade the tobacco leaves; and the connection design between the lamp stand 23 and the lamp body 230 makes it convenient for the user to rotate the lamp body 230 around the lamp stand 23 to adjust the illumination angle of the lamp body 230, so that the light emitted by the lamp body 230 can more accurately illuminate the tobacco leaves, improve the shooting clarity of the first visual camera 21 and the second visual camera, and improve the convenience of operation.

[0066] See attached Figure 1 -Attached Figure 4 A cover 13 is also installed on the body 1, and the cover 13 encloses the recognition unit 2, the flip unit 5 and the corresponding high-speed conveyor belt 11. The first visual camera 21 and the second visual camera 22 are both installed in the cover 13; the design of the cover 13 can protect the flip unit 5 and the recognition unit 2, and prevent the user from accidentally injuring the flip unit 5 by putting his hand into the high-speed conveyor belt 11.

[0067] See attached Figure 1 -Attached Figure 4 and attached Fig.15 -Attached Fig.16 The cache unit 4 includes a material receiving box 41, a moving part 42 and a baffle 43. The upper and lower ends of the material receiving box 41 are respectively provided with a feed port 411 connected to the material drop gap 110 and a discharge port 412 facing the discharge conveyor belt 12; a slide rail 41d is provided on the material receiving box 41, and the baffle 43 can be slidably installed on the slide rail 41d to open or close the discharge port 412; the moving part 42 is installed on the material receiving box 41 and is drivingly connected to the baffle 43 to drive the baffle 43 to move along the slide rail 41d.

[0068] Specifically, after passing through the material dropping gap 110, the tobacco leaves can fall into the receiving box 41 from the feed port 411. After the retained tobacco leaves fill the receiving box 41, the moving part 42 is started to control the baffle 43 to move along the slide rail 41d, so as to open the discharge port 412, so that the tobacco leaves of the same grade inside the receiving box 41 fall to the discharge conveyor belt 12, and then be transported to the next process.

[0069] It should be noted that, in order to avoid confusion, each buffer unit 4 needs to operate independently, that is, when the shutter 43 of one receiving box 41 is opened, the shutters 43 of the other receiving boxes 41 are in a closed state.

[0070] See attached Fig.15 -Attached Fig.16The moving part 42 can be of various types, for example, a mechanism with a stroke such as a screw motor can be used. The moving part 42 includes a cylinder 421, a rack 422 and a gear 423. The rack 422 is mounted on the baffle 43 and is parallel to the slide rail 41d. The gear 423 is rotatably mounted on the material receiving box 41 and meshed with the rack 422. The cylinder 421 is mounted on the material receiving box 41, and the telescopic end of the cylinder 421 is fixedly connected to the baffle 43.

[0071] Specifically, after the tobacco leaves fill the receiving box 41, the telescopic end of the control cylinder 421 is extended, which can drive the baffle 43 to move outward along the length direction of the slide rail 41d to open the discharge port 412; the telescopic end of the control cylinder 421 is contracted, which can drive the baffle 43 to move inward along the length direction of the slide rail 41d to close the discharge port 412; the coordinated use of the rack 422 and the gear 423 can improve the movement stability of the baffle 43.

[0072] It should also be noted that, although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application.

Claims

1. A tobacco leaf grading and sorting device, characterized in that: include: A machine body (1), wherein a plurality of groups of high-speed conveyor belts (11) are arranged in a linear array on the top of the machine body (1), and a material drop gap (110) is provided between each pair of the high-speed conveyor belts (11); and a material discharge conveyor belt (12) is also provided at the bottom of the machine body (1); An identification unit (2), the identification unit (2) comprising a first visual camera (21), the first visual camera (21) being installed above the high-speed conveyor belt (11) on the front side of the machine body (1); A material blocking unit (3), wherein a plurality of the material blocking units (3) are provided, and the plurality of the material blocking units (3) are all installed above the high-speed conveyor belt (11), and the plurality of the material blocking units (3) correspond one-to-one to the plurality of the material dropping gaps (110); A cache unit (4), wherein a plurality of the cache units (4) are provided, and the plurality of cache units (4) are all mounted on the machine body (1) and located between the high-speed conveyor belt (11) and the discharge conveyor belt (12), and the plurality of cache units (4) correspond one-to-one to the plurality of material drop gaps (110); After the first visual camera (21) identifies and grades the tobacco leaves on the high-speed conveyor belt (11), it sends a signal to control the multiple blocking units (3) to operate independently to block the corresponding drop gaps (110), so that when tobacco leaves of corresponding grades pass through multiple groups of the high-speed conveyor belts (11), they fall into the corresponding buffer units (4) through each drop gap (110). After the multiple buffer units (4) are filled with tobacco leaves, they can be opened to allow tobacco leaves of the same grade to fall onto the discharge conveyor belt (12) in a concentrated manner.

2. A tobacco leaf grading and sorting device according to claim 1, characterized in that: The material blocking unit (3) comprises a first fixed frame (31), a baffle plate (32) and a first driving unit (33); the first fixed frame (31) is installed above the high-speed conveyor belt (11) and is located beside the material dropping gap (110); the first driving unit (33) is installed on the first fixed frame (31) and is drivingly connected to the baffle plate (32) to drive the baffle plate (32) away from or close to the material dropping gap (110); The first visual camera (21) is electrically connected to the first driving unit (33) so as to control the baffle (32) to block or release tobacco leaves on the high-speed conveyor belt (11) through the first driving unit (33); when the tobacco leaves are blocked by the baffle (32), they fall into the corresponding buffer unit (4) through the drop gap (110).

3. A tobacco leaf grading and sorting device according to claim 2, characterized in that: The machine also includes a flipping unit (5), wherein the flipping unit (5) includes a second fixed frame (51), a shovel plate (52) and a second driving unit (53); the second fixed frame (51) is installed above the high-speed conveyor belt (11) on the front side of the machine body (1); the bottom end of the shovel plate (52) is designed to be arc-shaped and gradually deviates from the conveying direction of the high-speed conveyor belt (11); the second driving unit (53) is installed on the second fixed frame (51) and is drivingly connected to the top end of the shovel plate (52) to drive the shovel plate (52) away from or in contact with the belt body of the high-speed conveyor belt (11); and the first visual camera (21) is located between the blocking unit (3) and the flipping unit (5).

4. A tobacco leaf grading and sorting device according to claim 3, characterized in that: An arc angle α is formed between the top end of the shovel plate (52) and the bottom end of the shovel plate (52), and 5°≤α≤25°.

5. The tobacco leaf grading and sorting device according to claim 3, characterized in that: A cushion strip (520) is installed at the bottom edge of the shovel plate (52), and the shovel plate (52) can contact the belt body of the high-speed conveyor belt (11) through the cushion strip (520).

6. The tobacco leaf grading and sorting device according to claim 3, characterized in that: The first driving part (33) comprises a bracket (331), a guide block (332), a connecting block (333) and a servo motor (334); the bracket (331) is mounted on the first fixed frame (31) and is vertically provided with a guide rail (3311); two rotating wheels (3312) are also rotatably mounted on the bracket (331), and a belt (3313) is wound around the rotating wheels (3312); the guide block (332) is mounted on the baffle (32) and is slidably connected to the guide rail (3311); the connecting block (333) is fixedly connected to the guide block (332) and the baffle (32); the servo motor (334) is mounted on the bracket (331) and is drivingly connected to any of the rotating wheels (3312) so as to drive the baffle (32) away from or close to the blanking gap (110); the second driving part (53) has the same structure as the first driving part (33).

7. The tobacco leaf grading and sorting device according to claim 3, characterized in that: The identification unit (2) further comprises a second visual camera (22), the second visual camera (22) being mounted above the high-speed conveyor belt (11) on the front side of the machine body (1) and located on the front side of the flipping unit (5), and the second visual camera (22) being electrically connected to the second driving unit (53) so as to control the shovel plate (52) to flip or release the tobacco leaves on the high-speed conveyor belt (11) through the second driving unit (53).

8. The tobacco leaf grading and sorting device according to claim 7, characterized in that: The identification unit (2) further comprises a lamp stand (23), the lamp stand (23) being mounted on the machine body (1), and a lamp body (230) being rotatably mounted on the lamp stand (23), the lamp body (230) being damping-matched with the lamp stand (23); the lamp stand (23) is provided with two lamp bodies and respectively mounted beside the first visual camera (21) and the second visual camera (22), so that the two lamp bodies (230) correspondingly illuminate the tobacco leaves on the high-speed conveyor belt (11).

9. The tobacco leaf grading and sorting device according to claim 1, characterized in that: The buffer unit (4) comprises a material receiving box (41), a moving part (42) and a baffle (43); the material receiving box (41) is provided with a feed port (411) connected to the material drop gap (110) and a discharge port (412) facing the material discharge conveyor belt (12) at the upper and lower ends thereof; a slide rail (41d) is provided on the material receiving box (41); the baffle (43) is slidably mounted on the slide rail (41d) to open or close the discharge port (412); the moving part (42) is mounted on the material receiving box (41) and is drivingly connected to the baffle (43) to drive the baffle (43) to move along the slide rail (41d).

10. A tobacco leaf grading and sorting device according to claim 9, characterized in that: The moving part (42) comprises a cylinder (421), a rack (422) and a gear (423); the rack (422) is mounted on the baffle (43) and is parallel to the slide rail (41d); the gear (423) is rotatably mounted on the material receiving box (41) and is meshingly connected with the rack (422); the cylinder (421) is mounted on the material receiving box (41), and the telescopic end of the cylinder (421) is fixedly connected to the baffle (43) to drive the baffle (43) to move along the slide rail (41d).

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