A tobacco leaf intelligent grading system

Abstract

The present invention discloses an intelligent tobacco grading system, including a tobacco loosening system, a tobacco grading system, and a bin-splitting and stem-leveling system. The tobacco loosening system includes a manual unwinding channel, a vibration channel, a vibration screening device, and a vibration air selection device, the purpose of which is to gradually separate the tobacco leaves from large to small, from thick to thin, into single pieces through a mixed action of manual and mechanical means, in preparation for tobacco grading; the tobacco grading device includes an air selection chamber single piece part and an air duct grading system, the main function of which is to separate the tobacco leaves into single pieces by air selection, visually identify and grade them, and output them in different channels. The bin-splitting and stem-leveling system mainly includes a first belt, a second belt, and an output belt. This system can realize machine-automated grading of tobacco grading, replacing the existing status of manual grading, saving a lot of labor, and improving the intelligence of tobacco grading.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco machinery, and in particular relates to an intelligent tobacco leaf grading system. Background Art

[0002] At present, the tobacco leaf sorting tasks of leaf threshing and redrying enterprises are completed by graders according to national standards and relying on human sensory judgment. Human senses can distinguish quality factors such as tobacco leaf maturity, leaf structure, identity, oil content, color and length. Whether it is a stall-style or dynamic selection, it requires a lot of manpower and material resources. The selection personnel are often low-educated and have uneven mastery of tobacco leaf sorting ability after skill training. In addition, factors such as normal physiological fatigue and labor shortage in labor-intensive enterprises during the busy farming season directly restrict the efficiency and final quality of tobacco leaf sorting. The ability to re-select tobacco leaves has become a standard for determining the processing capacity of a redrying enterprise. Improving the ability to re-select tobacco leaves has become a top priority for the development of redrying enterprises. With the development of modern tobacco production and the continuous improvement of cigarette product quality, more professional and accurate tobacco leaf automatic grading systems are increasingly needed to solve the above-mentioned shortcomings of manual grading. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an intelligent tobacco grading system, which can quickly and accurately realize automatic loosening, grading and binning of tobacco leaves, ensure the consistency of tobacco grading, and effectively solve the current problems of large labor workload and low efficiency of manual grading.

[0004] The first aspect of the present invention provides a tobacco leaf intelligent grading system, which includes a tobacco leaf grading device, wherein the tobacco leaf grading device includes an air selection chamber monolithic system 5 and an air duct grading system 6 which are interconnected;

[0005] The wind selection chamber singulation system 5 comprises a vertical wind selection chamber 5-1, which is used to wind-select and singulate the loosened tobacco leaves into pieces, in preparation for visual identification and grading of the tobacco leaves;

[0006] The air duct classification system 6 comprises: an air duct 6-1, a first image acquisition module 6-2 arranged on the upper and lower sides outside the air duct 6-1, a plurality of vertical classification channels 6-3 arranged below the air duct 6-1 and connected to the air duct 6-1, and an air supply device;

[0007] The first image acquisition module 6-2 is used for acquiring images and locating tobacco leaf grades based on the images; the air supply device is used for blowing tobacco leaves of corresponding grades from top to bottom through the vertical grading channel 6-3.

[0008] Preferably, the tobacco leaf intelligent grading system further comprises: a bin-dividing and stem-leveling system 7 arranged downstream of the tobacco leaf grading device;

[0009] The bin-splitting and aligning system 7 includes a first belt 7-1, a second belt 7-2 and a plurality of output belts 7-3, a second image acquisition module arranged on the upper and lower sides of the first belt 7-1, and an air supply device;

[0010] The first belt 7-1 is located below the vertical grading channel 6-3, the first belt 7-1 and the second belt 7-2 are arranged in parallel, and a plurality of output belts 7-3 are vertically arranged at the tail ends of the first belt 7-1 and the second belt 7-2 respectively;

[0011] The first belt 7-1 is used to receive tobacco leaves discharged from the vertical grading channel 6-3, and the second image acquisition module is used to implement upper and lower double-sided visual secondary inspection to further grade the tobacco leaves during the operation of the first belt 7-1;

[0012] The air supply device is used to transport the tobacco leaves on the first belt 7-1 horizontally to the second belt 7-2 when the second image acquisition module finds that the tobacco leaves are not tobacco leaves of the corresponding grade of the current channel through the secondary detection;

[0013] The plurality of output belts 7-3 are used to output tobacco leaves of corresponding grades and to achieve the effect of evenly stalking the tobacco leaves.

[0014] Preferably, the tobacco leaf intelligent grading system further comprises: a tobacco leaf loosening system arranged upstream of the tobacco leaf grading device;

[0015] The tobacco loosening system includes a vibrating screening device 3 and a vibrating air selection device 4 arranged from upstream to downstream;

[0016] The vibration screening device 3 is a multi-layer design; the first level of each layer is a screen mechanism 3-1, and the second level is a vibration roller 3-2. The vibration screening device 3 also includes: a dust absorber arranged at the top;

[0017] The vibrating air separation device 4 comprises: an air separation vibrating roller table 4-1 arranged at the upper part, and a fan 4-2 arranged at the lower part.

[0018] Preferably, the tobacco leaf intelligent grading system further comprises: the tobacco leaf loosening system further comprises a vibration channel system 2 arranged upstream of the vibration screening device 3;

[0019] The vibration channel system 2 comprises an upper belt 2-1 and a lower belt 2-2 which are arranged obliquely, wherein the upper belt 2-1 and the lower belt 2-2 form a first clamping section 2-3 located upstream and a second clamping section 2-4 located downstream, wherein the first clamping section 2-3 and the second clamping section 2-4 are arranged in a staggered manner perpendicular to the conveying direction of the tobacco leaves, so that the first clamping section 2-3 and the second clamping section 2-4 can clamp different parts of the tobacco leaves, wherein the first clamping section 2-3 is used to clamp the ends of the tobacco stems and shake them to separate the tobacco leaves, and the second clamping section 2-4 is used to clamp the ends of the tobacco leaves and shake them to separate the tobacco leaves;

[0020] The vibration channel system 2 also includes a conveyor belt 2-6 which is arranged obliquely and is located below the lower belt 2-2. The conveyor belt 2-6 is used to collect the tobacco leaves shaken off by the first clamping section 2-3 and the second clamping section 2-4 and convey them forward.

[0021] Preferably, the tobacco leaf intelligent grading system further comprises: the tobacco leaf loosening system further comprises a manual unbundling channel 1 arranged at the most upstream, which is used to provide a channel for feeding materials after the tobacco leaves are manually unbundled.

[0022] Preferably, the air duct 6 - 1 has an air duct bending section, and the first image acquisition module 6 - 2 is arranged on the upper and lower sides of the air duct bending section to take pictures of tobacco leaves for tobacco leaf level positioning.

[0023] Preferably, the vibration channel system 2 further comprises a dust cover 2-5, and the dust cover 2-5 is obliquely arranged on the outer sides of the first clamping section 2-3 and the second clamping section 2-4 to protect the first clamping section 2-3 and the second clamping section 2-4 from dust.

[0024] Preferably, the vibrating roller 3 - 2 is an eccentric vibrating roller, and the air separation vibrating roller 4 - 1 is an eccentric vibrating roller.

[0025] Preferably, the air separation vibration roller 4-1 is horizontally arranged, and a pneumatic loosening channel 4-3 is vertically arranged at the front end of the air separation vibration roller 4-1.

[0026] Preferably, the tobacco leaf loosening system comprises at least two vibrating air separation devices 4 arranged in series.

[0027] In the present invention, the conveying direction of tobacco leaves is described as from upstream to downstream.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. In the present invention, the first image acquisition module 6-2 is used in the air duct 6-1 to realize the initial classification of tobacco leaves. The air duct 6-1 has a large processing volume of tobacco leaves and a fast movement speed of tobacco leaves. Therefore, the processing speed of tobacco leaf classification is fast and the device has high production capacity. However, the existing classification work is mostly done manually. In the technical attempt to classify tobacco leaves by combining mechanical automation and visual technology, the existing methods mostly use the combination of conveyor belts and visual imaging technology to realize tobacco leaf classification on the belt channel. Therefore, the processing speed of tobacco leaf classification is slow and the production capacity is low, which is far from meeting the actual production needs.

[0030] However, the existing technologies mostly implement tobacco leaf grading on belts, so the processing speed of tobacco leaf grading is slow and the production capacity is low.

[0031] 2. The present invention is also provided with a binning and stem leveling system 7 after the initial classification of tobacco leaves, and the tobacco leaves discharged from the vertical classification channel 6-3 are subjected to secondary detection by the second image acquisition module for further classification. When the secondary detection of the second image acquisition module finds that the tobacco leaves are not of the grade corresponding to this channel, the tobacco leaves on the first belt 7-1 will be blown horizontally to the second belt 7-2 for separate output.

[0032] 3. In particular, in the present invention, a duct bending section is provided in the duct 6-1, and the first image acquisition module 6-2 is provided on the upper and lower sides of the duct bending section to take a front picture of the tobacco leaves for tobacco leaf level positioning.

[0033] Since the tobacco leaves are basically perpendicular to the air duct in the air duct, the shooting adjustment angle of the first image acquisition module 6-2 (camera of the present invention) can be more easily adjusted to shoot the front side (or closer to the front side) of the tobacco leaves. The shooting area is large and the picture can more fully present the characteristics of the tobacco leaves. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of channel 1 for manual interpretation.

[0035] Figure 2 It is a schematic diagram of the structure of the vibration channel system 2.

[0036] Figure 3 It is a schematic diagram of the structure of the vibration screening device 3.

[0037] Figure 4 It is a structural schematic diagram of the vibration air selection device 4.

[0038] Figure 5 It is a schematic diagram of the structure of the air selection chamber 5.

[0039] Figure 6 It is a partial structural diagram of the air duct classification system 6, and only a part of the air duct bending section is cut out to illustrate the coordination relationship between the air duct bending pipe and the first image acquisition module.

[0040] Figure 7 It is a structural diagram of the warehouse and stem system 7.

[0041] Figure 8 This is the layout diagram of the entire tobacco leaf intelligent grading system.

[0042] List of reference numerals:

[0043] 1. Manual unwinding channel, 2. Vibrating channel system, 2-1. Upper belt, 2-2. Lower belt, 2-3. First clamping section, 2-4. Second clamping section, 2-5. Dust cover, 2-6. Conveyor belt, 3. Vibrating screening device, 3-1. Screen mechanism, 3-2. Vibrating roller, 4. Vibrating air selection device, 4-1. Air selection vibration roller, 4-2. Fan, 4-3. Pneumatic loosening channel, 5. Air selection chamber monolithic system, 5-1. Vertical air selection chamber, 5-2. Side air duct, 6. Air duct grading system, 6-1. Air duct, 6-2. First image acquisition module, 6-3. Vertical grading channel, 6-4. Rejection channel, 7. Binning and stem alignment system, 7-1. First belt, 7-2. Second belt, 7-3. Output belt, 7-4. Conversion channel, 8. Cigarette packs, 9. Cigarette handles. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with embodiments.

[0045] Those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product specifications are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0046] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used herein may include wireless connections.

[0047] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0049] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0050] The tobacco intelligent grading system provided by the present invention records the tobacco conveying direction as from upstream to downstream, and the tobacco intelligent grading system includes a tobacco loosening system, a tobacco grading system, and a bin-by-bin stem leveling system 7 which are arranged from upstream to downstream and are interconnected.

[0051] The tobacco loosening system includes a manual unwinding channel 1, a vibration channel system 2, a vibration screening device 3 and a vibration air selection device 4 arranged from upstream to downstream. The purpose is to gradually separate the tobacco leaves from large to small and from thick to thin through a combination of manual and mechanical actions to achieve single-piece formation, thereby preparing for tobacco grading.

[0052] The manual unbundling channel 1 manually unbundles the whole package of tobacco leaves into small bundles. The tobacco package 8 is manually placed on the operating table, and the tobacco bundles 9 are manually unbundled for feeding. The drying and crushing during the unbundling process are controlled, and preliminary loosening is performed. Considering the crushing problem, the unbundling is currently performed manually, and the mechanical unbundling method will be explored later. The manual unbundling channel 1 is specifically as follows Figure 1 shown.

[0053] The vibration channel system 2 includes two upper belts 2-1 and two lower belts 2-2 which are arranged obliquely, and one upper belt 2-1 and one lower belt 2-2 form a first clamping section 2-3 located upstream. Another upper belt 2-1 and another lower belt 2-2 form a second clamping section 2-4 located downstream. The first clamping section 2-3 and the second clamping section 2-4 are staggered in a direction perpendicular to the conveying direction of the tobacco leaves, so that the first clamping section 2-3 and the second clamping section 2-4 can clamp different parts of the tobacco leaves. Specifically: the first clamping section 2-3 clamps the end of the tobacco stem and shakes it to separate the tobacco leaves, and then conveys it to the second clamping section 2-4, and the second clamping section 2-4 clamps the end of the tobacco leaves and shakes it to separate the tobacco leaves.

[0054] The vibration channel system 2 also includes a conveyor belt 2-6 which is arranged obliquely and is located below the lower belt 2-2. The conveyor belt 2-6 is used to collect the tobacco leaves shaken off by the first clamping section 2-3 and the second clamping section 2-4 and convey them forward.

[0055] The conveyor belt 2-6 can also destroy the connection state of the adhesive joints of the tobacco leaves when it is transported and shaken upward, so that the connections between the tobacco leaves are separated. The vibration channel system 2 also includes a dust cover 2-5, which is tiltedly arranged on the outside of the first clamping section 2-3 and the second clamping section 2-4 to prevent dust from the first clamping section 2-3 and the second clamping section 2-4.

[0056] At the first clamping section 2-3, the lower belt 2-2 protrudes relative to the upper belt 2-1 and connects to the manual unwinding channel 1 to achieve the feeding of tobacco leaves. The conveyor belt 2-6 outputs the loose tobacco leaves to the vibrating screening device 3. The vibrating channel system 2 is specifically as follows Figure 2 shown.

[0057] The vibration screening device 3 includes a multi-layer screen mechanism 3-1 and a vibration roller 3-2. The screen mechanism 3-1 of the first layer is located below the entrance of the vibration screening device 3, and is used to receive tobacco leaves transported from upstream. The first level of each layer is a screen mechanism 3-1, which initially shakes out the tobacco leaves by vibration, and preliminarily removes the impurities of stones in the tobacco leaves through the sieve. The second level of each layer is a vibration roller 3-2, which is composed of an eccentric roller. The tobacco leaves enter a vibration roller 3-2, and are further loosened under the rotation and tumbling of the eccentric roller, i.e., the irregular roller, and then fall into the loosening mechanism composed of the next layer of screen mechanism 3-1 and vibration roller 3-2 at the lower end. This is repeated until the tobacco leaves are fully shaken out. The vibration roller 3-2 is a closed structure, and there is wind from bottom to top between the vibration rollers 3-2 to help shake out the tobacco leaves. A multi-stage dust absorber is arranged in the uppermost air duct in the vibration screening device 3 to reduce dust. At the same time, the gap between the eccentric rollers settles the impurities and particles between the tobacco leaves. The specific structure of the vibration screening device 3 is as follows: Figure 3 shown.

[0058] Vibration air separation device 4 Figure 4 As shown, the upper part is still the air selection vibration roller 4-1 formed by the eccentric roller group structure, and the lower part is provided with a fan 4-2. After the tobacco leaves enter the lower part of the vibration air selection device 4, under the upward action of the wind force, the tobacco leaves float upward through the wind-driven loosening channel 4-3 vertically arranged at the front end, where the tobacco leaves are further loosened. The loosened tobacco leaves move to the air selection vibration roller 4-1 for further vibration loosening. Through the vibration air selection action twice, the tobacco leaves are fully loosened. In this embodiment, two vibration air selection devices 4 are arranged in series to fully disperse the tobacco leaves.

[0059] The tobacco leaf grading device comprises an air selection chamber singulation system 5 and an air duct grading system 6, and its main functions are to singulate the tobacco leaves by air selection, grade them by visual identification, and output them by channels.

[0060] The air selection chamber singulation system 5 is used to singulate the loosened tobacco leaves into pieces, in preparation for visual identification and grading of tobacco leaves. The air selection chamber singulation system 5 includes a vertical air selection chamber 5-1. The vertical air selection chamber 5-1 is supplied with air by positive pressure from the bottom, and the tobacco leaves are sent to the bottom of the vertical air selection chamber 5-1. The vertical air selection chamber 5-1 uses buoyancy to blow the tobacco leaves from bottom to top. Under the spiral wind field generated by the side air duct, the singulated tobacco leaves are blown out from the top of the vertical air selection chamber 5-1 while further tearing and loosening them. Multiple pieces of bonded tobacco leaves fall back to the bottom for circulating air delivery and loosening. The singulated tobacco leaves sent out by the wind enter the air duct grading system 6 for visual grading. Figure 5 It is a structural schematic diagram of the air selection chamber monolithic system 5. Figure 5 The arrow in the figure indicates the direction of wind movement.

[0061] The air duct grading system 6 includes: an air duct 6-1, a first image acquisition module 6-2 arranged on the upper and lower sides of the air duct 6-1, three vertical grading channels 6-3 arranged below the air duct 6-1 and connected to the air duct 6-1, and an air supply device. After a single tobacco leaf enters the air duct 6-1, the first image acquisition module 6-2 is used to acquire images from the upper and lower sides of the air duct 6-1, and the tobacco leaf grade is located according to the image, and then the positive pressure gas provided by the air supply device is used to blow and discharge the tobacco leaves of the corresponding grade from top to bottom. The three vertical grading channels 6-3 arranged below the air duct 6-1 are the channels for the tobacco leaves of the corresponding grade to fall. In this embodiment, the first image acquisition module 6-2 includes a camera and a light source coordinated with the camera. The air supply device can be a fan, etc. Figure 6 The diagram is a partial structural diagram of the air duct classification system 6, with only a portion of the air duct bending section cut out for illustration. The air duct bending section is a smooth bending section. A rejection channel 6-4 is also connected below the air duct 6-1.

[0062] The bin alignment system 7 includes four first belts 7-1, four second belts 7-2 and a plurality of output belts 7-3, a second image acquisition module arranged on the upper and lower sides of the first belt 7-1, and an air supply device. The four first belts 7-1 are respectively located below the three vertical grading channels 6-3 and the rejection channel 6-4, the first belt 7-1 and the second belt 7-2 are arranged in parallel, and a plurality of output belts 7-3 are respectively arranged vertically at the tail ends of the first belt 7-1 and the second belt 7-2 to achieve an alignment effect. In this embodiment, the second image acquisition module includes a camera and a light source coordinated with the camera. The air supply device can be a fan or the like. The tobacco leaves discharged from the vertical grading channel 6-3 or the rejection channel 6-4 after the initial inspection in the air duct 6-1 fall from the vertical grading channel 6-3 or the rejection channel 6-4 to the first belt 7-1 below. The operation speed of the first belt 7-1 and the falling speed of the tobacco leaves are coordinated to control the posture of the tobacco leaves so that the length direction of the first belt 7-1 is parallel to the operation direction of the first belt 7-1, and the upper and lower double-sided visual secondary inspection is realized during the operation of the first belt 7-1 to increase the accuracy of classification. If the secondary inspection on the first belt 7-1 finds that the tobacco leaves are not tobacco leaves of the corresponding grade of this channel, the air supply device blows the tobacco leaves on the first belt 7-1 horizontally to the second belt 7-2, and the second belt 7-2 blows them to the corresponding output belt 7-3 for output. Figure 7 The transmission part of the second belt 7-2 and the output belt 7-3 is a schematic diagram of the structure of the bin-to-bin system 7. Figure 7 Not shown, this is a conventional design.

[0063] Figure 8 This is the layout diagram of the entire tobacco leaf intelligent grading system. Figure 8Another situation of the air duct classification system 6 is illustrated: the air duct 6-1 is straight, and the first image acquisition module 6-2 is obliquely arranged on the upper and lower sides outside the air duct 6-1. This design can also meet the requirements.

Claims

1. A tobacco leaf intelligent grading system, characterized in that: It comprises a tobacco leaf grading device, wherein the tobacco leaf grading device comprises an air selection chamber monolithic system (5) and an air duct grading system (6) which are interconnected; The wind selection chamber singulation system (5) comprises a vertical wind selection chamber (5-1), which is used to wind-select and singulate the loosened tobacco leaves into pieces, in preparation for visual identification and grading of the tobacco leaves; The air duct classification system (6) comprises: an air duct (6-1), a first image acquisition module (6-2) arranged on the upper and lower sides outside the air duct (6-1), a plurality of vertical classification channels (6-3) arranged below the air duct (6-1) and connected to the air duct (6-1), and an air supply device; The first image acquisition module (6-2) is used to acquire images of tobacco leaves and to locate the grade of tobacco leaves according to the tobacco leaf images; the air supply device is used to blow tobacco leaves of corresponding grades from top to bottom through the vertical grading channel (6-3); The tobacco leaf intelligent grading system further comprises: a bin separation and stem leveling system (7) arranged downstream of the tobacco leaf grading device; The bin-dividing and aligning system (7) comprises a first belt (7-1), a second belt (7-2) and a plurality of output belts (7-3), a second image acquisition module arranged on the upper and lower sides of the first belt (7-1), and an air supply device; The first belt (7-1) is located below the vertical grading channel (6-3), the first belt (7-1) and the second belt (7-2) are arranged in parallel, and a plurality of output belts (7-3) are respectively arranged vertically downstream of the first belt (7-1) and the second belt (7-2); The first belt (7-1) is used to receive tobacco leaves discharged from the vertical grading channel (6-3), and the second image acquisition module is used to implement upper and lower double-sided visual secondary inspection to further grade the tobacco leaves during the operation of the first belt (7-1); The air supply device is used to transport the tobacco leaves on the first belt (7-1) horizontally to the second belt (7-2) when the second image acquisition module finds through secondary detection that the tobacco leaves are not tobacco leaves of the corresponding grade in the current channel; The plurality of output belts (7-3) are used to output tobacco leaves of corresponding grades and achieve the effect of evenly distributing the stems; The tobacco leaf intelligent grading system further comprises: a tobacco leaf loosening system arranged upstream of the tobacco leaf grading device; The tobacco leaf loosening system comprises a vibrating screening device (3) and a vibrating air selection device (4) arranged from upstream to downstream; The vibrating screening device (3) is a multi-layer design; the first level of each layer is a screen mechanism (3-1), and the second level is a vibrating roller (3-2); the vibrating screening device (3) further comprises: a dust absorber arranged at the top; The vibrating air separation device (4) comprises: an air separation vibrating roller (4-1) arranged at the upper part, and a fan (4-2) arranged at the lower part; The tobacco leaf intelligent grading system further comprises: the tobacco leaf loosening system further comprises a vibration channel system (2) arranged upstream of the vibration screening device (3); The vibration channel system (2) comprises an upper belt (2-1) and a lower belt (2-2) which are arranged obliquely, wherein the upper belt (2-1) and the lower belt (2-2) form a first clamping section (2-3) located upstream and a second clamping section (2-4) located downstream, wherein the first clamping section (2-3) and the second clamping section (2-4) are arranged in a staggered manner perpendicular to the conveying direction of the tobacco leaves, so that the first clamping section (2-3) and the second clamping section (2-4) can clamp different parts of the tobacco leaves, wherein the first clamping section (2-3) is used to clamp the ends of the tobacco stems and shake them so as to separate the tobacco leaves, and the second clamping section (2-4) is used to clamp the ends of the tobacco leaves and shake them so as to separate the tobacco leaves; The vibrating channel system (2) further comprises a conveyor belt (2-6) which is arranged obliquely and is located below the lower belt (2-2); the conveyor belt (2-6) is used to collect tobacco leaves shaken off by the first clamping section (2-3) and the second clamping section (2-4) and convey them forward.

2. The tobacco leaf intelligent grading system according to claim 1, characterized in that: The tobacco leaf loosening system further comprises a manual unbundling channel (1) arranged at the most upstream, which is used to provide a channel for feeding materials after the tobacco leaves are manually unbundled.

3. The tobacco leaf intelligent grading system according to claim 1, characterized in that: The air duct (6-1) has an air duct bending section, and the first image acquisition module (6-2) is arranged on the upper and lower sides of the air duct bending section to take pictures of tobacco leaves for tobacco leaf grade positioning.

4. The tobacco leaf intelligent grading system according to claim 1, characterized in that: The vibration channel system (2) further comprises a dust cover (2-5), wherein the dust cover (2-5) is arranged obliquely on the outside of the first clamping section (2-3) and the second clamping section (2-4) and is used to protect the first clamping section (2-3) and the second clamping section (2-4) from dust.

5. The tobacco leaf intelligent grading system according to claim 1, characterized in that: The vibrating roller (3-2) is an eccentric vibrating roller, and the air selection vibrating roller (4-1) is an eccentric vibrating roller.

6. The tobacco leaf intelligent grading system according to claim 1, characterized in that: The wind selection vibration roller (4-1) is arranged horizontally, and a pneumatic loosening channel (4-3) is arranged vertically at the front end of the wind selection vibration roller (4-1).

7. The tobacco leaf intelligent grading system according to claim 1, characterized in that: The tobacco leaf loosening system comprises at least two vibrating air selection devices (4) arranged in series.

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