Raw tobacco selecting and grading method and system for large-flow grouping processing

Abstract

The invention discloses a crude tobacco selecting and grading method and system for large-flow grouping processing, which comprises the following steps of: placing tobacco leaves subjected to impurity removal and grading on a workbench in piles in a static selecting manner, and placing the graded tobacco leaf piles on a main swing handle belt conveyor; a grouping worker takes down the tobacco leaves with grades needing to be sorted in piles and places the tobacco leaves on a secondary grade conveying belt which is below a handle placing belt and is perpendicular to the handle placing belt, and single-grade materials which are graded according to standard samples and selection requirements are formed on the secondary grade conveying belt. And each sub-grade belt is a single-grade material corresponding to the standard sample. The materials of each grade can be subjected to follow-up process treatment such as cutting, framing, warehousing, formulation and direct online according to process requirements, and grouped processing of the materials of the single grade is achieved. Single-grade materials are placed and fed on a line in a stacking mode, large-flow machining production can be achieved, and the requirement of production line production is met. And inspection is set by taking tables and groups as units in the selection process, so that the selection and grading quality is ensured.

Description

Technical Field

[0001] The present invention relates to the field of tobacco processing, and particularly to a method and system for selecting and grading raw tobacco with large-flow grouped processing. Background Art

[0002] In the process of selecting and grading raw tobacco, the currently adopted methods are mainly the traditional floor-type or table-type leaf selection. Such methods have problems such as low work efficiency, large labor consumption, large floor area, poor on-site working environment, and mixing of on-site personnel and logistics, and do not meet the current automated production mode.

[0003] CN115568613A discloses a refined manual special selection process for high-end specialty tobacco leaves. Its main processing process is as follows: "Initial raw material classification, determining the grade of high-end specialty raw materials according to the ecological conditions of different ecological regions, previous rotation crops, and planted cigarettes; refined sheet selection, after determining the grade, the tobacco leaf raw materials are subjected to moisture balance, and then selected leaf by leaf; special selection, the selected tobacco leaves are accurately removed from leaf surface defects through manual identification to complete special selection; material detection, the tobacco leaves are summarized and transported on the conveyor belt given in this patent. The process method is for manual selection of high-end specialty tobacco, which is a manual processing mode of refining and further refining high-end specialties and tobacco leaves. Its processed raw materials and process purposes are different from the processing modes of removing impurities and grading conventional production line materials."

[0004] There have also been attempts to adopt a human-machine combination method for the selection and grading of raw tobacco. For example, CN101301109A discloses a process and device for online slicing and grouping of raw tobacco by removing the tobacco heads, adopting a mode of slicing first and then selecting and grading: "The bundle of tobacco is placed on the bundling table with the tobacco heads in the same direction by the bundling station, and then connected to the tobacco head cutting machine through each bundling table. The tobacco head cutting machine separates the tobacco head from the tobacco leaves", "After cutting, the tobacco leaves are manually scattered by the leaf placing station, and the tobacco leaves are laid flat on the leaf placing table and enter their respective leaf selection conveyor belts. Then, the leaf selectors compare with their respective tobacco leaf templates for manual leaf selection. The tobacco leaves selected according to the tobacco leaf templates are placed into their respective leaf output conveyor belts, and are transported to their respective bins through the respective classified tobacco leaf outlets. The remaining tobacco leaves after selection enter the summary output conveyor belt and are transported to the bin through the classified tobacco leaf outlet". The following problems exist in the actual application of this mode: Adopting the mode of "placing the bundle of tobacco on the bundling table with the tobacco heads in the same direction by the bundling station, and then connecting to the tobacco head cutting machine through each bundling table and adopting the mode of slicing first and then selecting and grading", this way of slicing first and then grading restricts the grouped processing of tobacco leaves according to their own characteristics. The tobacco leaves of different grades after grading have different physical characteristics of tobacco leaves. There are differences in physical dimensions such as the length of the tobacco stem, the length in the middle of the leaf, and the length of the tobacco head. And there are also differences in the subsequent process treatment modes for tobacco leaves of different grades. For example, some grade leaves need to be cut into two knives and three segments, and each segment is output separately. Some grade leaves need to be cut into one knife and two segments in the middle. Some grade leaves need to have the tobacco heads cut, etc. This method cuts the tobacco heads of all the tobacco leaves to be graded according to a unified size, restricting the grouped processing of different grade tobacco leaves according to their own characteristics and not meeting the requirements of maximizing characteristics and fine processing production. This method requires the cut leaves to be manually laid flat, and then an artificial leaf selection and grading method is set up later. There are problems of low efficiency and not meeting the production flow requirements of the production line. Each leaf is manually laid flat and then an artificial leaf selection is set up separately, resulting in a huge amount of manual labor. In addition, when manually selecting and grading the leaves dynamically on the conveyor belt, it is easy to cause visual fatigue and the quality of selection and grading is not high. And the materials processed by the system are all solidified for natural boxing and cannot be flexibly configured. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: in view of the common problems in the current redrying factory's raw tobacco picking and grading, such as low work efficiency, large labor volume, production mode not meeting the current automated production mode, large land occupation, poor working environment, mixed on-site personnel and logistics, the present invention provides a raw tobacco picking and grading method and system for large-flow group processing, which can realize the picking and grading of raw tobacco, and output and / or separate processing of each grade while realizing large-flow processing and production of the production line. It can realize multi-grade grading, and each grade of materials can be output separately. Subsequently, they are grouped and processed according to the characteristics and process requirements of materials of different grades. In the picking process, static manual impurity removal, picking and grading are adopted, and small group table inspection and large group inspection are set up to ensure the picking quality.

[0006] Before selecting the raw tobacco, the present invention prepares standard samples according to the raw tobacco conditions and the subsequent process requirements, and trains the selection and grading personnel according to the standard samples and the selection requirements, so that the personnel can perform the selection and grading according to the standard samples and the selection requirements. Then, the raw tobacco is selected, impurities are removed, and graded. The specific method is as follows:

[0007] A plurality of groups of raw cigarette picking grouping workbenches are set up, and each raw cigarette picking workbench is correspondingly provided with raw cigarette frames to be picked. An auxiliary robotic arm is used and manually operated to transport the sack-packed raw cigarette packages in the raw cigarette frames to the workbench.

[0008] After the cigarette bales are transported to the workbench, they are opened and the packaging sacks are collected.

[0009] The workbench is divided into a manual selection and grading area and an area where tobacco leaves of different grades are placed in piles after sorting. The manual selection and grading area is used to select, remove impurities and grade tobacco leaves after unpacking. A grid-shaped sieve plate is set in the manual selection and grading area of ​​the workbench, so that the debris and fragments mixed between the tobacco leaves during the manual shaking of the tobacco leaves fall into the collection box under the workbench; a hole-shaped debris discarding port is set on both sides of the manual standing station in the selection and grading area, so that the unqualified tobacco leaves, hemp silk and other debris that are selected can be discarded and discharged into the collection box under the workbench. A grid-shaped sieve plate is also set in the area where tobacco leaves of different grades are placed in piles after sorting, so that the debris generated during the placement process can be discharged; a hole-shaped debris discarding port is set to facilitate the discharge of unqualified materials found accidentally. This setting is also convenient for the tobacco leaf placement area after grading to be used as an impurity removal and selection station when there is no grading requirement but only impurity removal requirements for processing leaves.

[0010] In the manual picking and grading area, the unpacked tobacco leaves are manually shaken, picked out and graded. During this process, debris in the tobacco leaves, such as dust and stones, are detached from the tobacco leaves and enter the debris collection box under the workbench. Debris, such as hemp fibers and feathers, and unqualified tobacco leaves such as moldy leaves are manually picked out and fall into the debris collection box, and fragments also fall into the debris collection box at the same time.

[0011] Manually classify the qualified tobacco leaves according to the standard samples, and stack the tobacco leaves of different grades after classification in the stacking area of the workbench. Each stack of tobacco leaves is of the same grade as the control standard sample, and the heads are oriented in the same direction when stacking.

[0012] The stacker worker stacks the selected and classified tobacco leaves on the stacking belt, leaving a relatively obvious gap between the stacks.

[0013] The grouping worker takes down the single-grade materials in piles on the stacking belt from the stacking belt unit by unit and places them on the secondary-grade belt arranged under the stacking belt machine and perpendicular to the stacking belt machine. Each secondary-grade belt places materials of the same grade. The grouping workers on both sides of each secondary-grade belt only take down the corresponding-grade tobacco leaves processed by this secondary-grade belt from the stacking belt machine, and the remaining stacks of tobacco leaves of other grades are retained on the stacking belt. During this process, the stacking belt machine does not stop, and the dynamic grouping method is adopted.

[0014] After all the secondary-grade tobacco leaves are taken down from the stacking belt machine, the remaining materials on the stacking belt are the main-grade materials, and the grouping of tobacco leaves is completed.

[0015] The secondary-grade belt outputs the raw tobacco of different grades separately, and subsequent corresponding process treatments can be carried out according to process requirements. For example, if subsequent cutting treatment is required, the tobacco leaves output by different secondary-grade belts can be cut differently according to process requirements: not cut, cut into two sections with one cut, cut into three sections with two cuts, cut the head, etc. And when the materials on different secondary-grade belts are cut, different cutting length parameters can also be set according to process requirements: for example, when cutting the head, it can be cut to a length of 150 cm or 250 cm, etc.

[0016] Each secondary-grade belt discharges materials to form a single-grade material, and its subsequent treatment is set according to the material grade characteristics and process requirements, and can be cut, boxed, stored in the warehouse, formulated, directly put on the line, etc., truly realizing the refined processing mode of grouping and processing according to materials.

[0017] The quality inspection of the selection and classification is carried out by setting up in-process inspection at the group level and final inspection at the large-group level: every 2 - 4 workbenches form a group, and an in-process inspector is set to monitor the quality of leaf selection. Every 2 - 4 groups form a large group, and a final inspector is set to control the quality of leaf selection.

[0018] Processing in the form of single-grade tobacco leaf stacks can meet the processing requirements of large-flow production lines.

[0019] The system used in this method mainly has the following main parts:

[0020] Raw tobacco rough sorting system: It mainly consists of a leaf selection table, a bundle placing belt conveyor, a 90-degree turning belt, etc. This system conducts the online feeding of raw tobacco bales, selects tobacco leaves, and classifies the raw tobacco leaves according to process requirements. After classification, the raw tobacco leaves are placed on the leaf selection belt in bundles by grade. First, manually place the raw tobacco bale on the leaf selection table, manually open the bale, take out the raw tobacco leaves, and after taking them out, manually shake the raw tobacco leaves to remove sundries such as jute, feathers, plastics, stones, metals, etc. After removing the sundries, the raw tobacco is divided into multiple groups of graded materials according to the grades required by the process. Each group of graded materials is in bundles, and the weight of each bundle is about 2 kg to 2.5 kg. Place the materials on the bundle placing belt conveyor, and the bundle placing belt conveyor conveys the raw tobacco leaves in bundles after manual impurity removal and classification to the subsequent processing section. When the flow rate is large or the number of groups is large, the system can set up a 90° connecting belt conveyor to achieve 90° turning belt conveying for material transportation, facilitating the reasonable use of the site.

[0021] Raw tobacco grouping and processing system: Group and process the tobacco leaf bundles that have been graded by the raw tobacco rough sorting system. Place the tobacco leaf bundles of different grades on different conveyors, that is, the raw tobacco of different grades is divided into different groups for separate conveying and separate processing of each group of tobacco leaves to achieve the grouping and processing of tobacco leaves. The system mainly consists of conveyors with a 90° staggered layout up and down. The upper conveyor conveys all tobacco leaf bundles and main grade materials (large proportion materials), and the lower conveyor collects and conveys secondary grade materials (small proportion materials). All the tobacco leaf bundles that have been graded by the raw tobacco rough sorting system are conveyed by the upper conveyor. When reaching the corresponding position of the lower conveyor, the tobacco leaf bundles of the corresponding grade on the upper layer are taken down according to the grade of the raw tobacco leaves conveyed by the lower layer materials and placed on the lower conveyor to form a single grade of tobacco leaf bundles that meet the process requirements on the lower conveyor. The conveying of a single grade of tobacco leaf bundles corresponding to each grade is finally formed on each lower conveyor. When each single grade of tobacco leaves required by the process is taken down from the upper conveyor and placed on the corresponding lower conveyor, the main grade materials are left on the upper conveyor in the end.

[0022] Selection and grading technology: Select and grade raw tobacco according to process requirements and ensure the corresponding online processing capacity. Adopt an online continuous grading method to meet the process requirements.

[0023] Multi-stage grading technology: Divide raw tobacco into different grades according to process requirements, and each grade needs to be output and processed separately. Set the number of conveyors for secondary grade materials (small proportion materials) according to the maximum number of grades of secondary grade materials (small proportion materials) and the quantity of secondary grade materials (small proportion materials) required by the process.

[0024] The beneficial effects of the present invention include:

[0025] (1) Ensure the quality of tobacco leaf selection and impurity removal, and grading by manual static selection;

[0026] (2) Conduct systematic processing in units of single-grade tobacco leaf piles to meet the production requirements of large-flow production lines;

[0027] (3) Adopt the mode of grading first and then processing (such as cut-off handle lights), so that the graded tobacco leaves can be subsequently processed according to their own characteristics and process requirements, realizing true primary tobacco leaf grouping processing; It can overcome many problems caused by the need for manual laying of cut leaves and subsequent manual leaf selection and grading methods;

[0028] (4) The system can achieve multi-level grading, and one set of system can adapt to multiple grading modes, with flexible use;

[0029] (5) Solve the efficiency problem of the traditional leaf selection mode, solve the production automation problem, solve the production capacity problem, solve the multi-level grading problem, solve the problem of the amount of manual labor and manual labor intensity, solve the problem of large floor area, solve the problem of poor safety due to the mixing of people and logistics, solve the problem of the mixed working environment, etc.;

[0030] (6) The present invention is simple and flexible in composition, adopts highly automated system operation, has high productivity, can meet the large-flow production in terms of production capacity, reduces the labor intensity of workers, and can realize primary tobacco leaf grouping processing. This method can promote the development of the national economy towards the direction of high quality and high reliability, improve the production structure and environment, save manpower, material resources, financial resources and resources, and obtain overall social and economic benefits. Brief Description of the Drawings

[0031] Figure 1 : Flow chart of a method for selecting and grading primary tobacco leaves for large-flow grouping processing.

[0032] Figure 2 : General plan view of a system for selecting and grading primary tobacco leaves for large-flow grouping processing, where: a, b, c, d, e respectively indicate functional areas such as workbench, hopper and collection box, station setting, bunching by pile, and grouping processing.

[0033] Figure 3 : Plan view of the setting of workbench a.

[0034] Figure 4 : Elevation view of the hopper and collection box b set on the workbench.

[0035] Figure 5 : Schematic diagram of station setting c.

[0036] Figure 6 : Schematic diagram of bunching by pile d.

[0037] Figure 7: Schematic diagram of grouped processing e.

[0038] In the figure: 1 - raw tobacco bale frame, 2 - raw tobacco workbench, 3 - handle - placing belt conveyor, 4 - raw tobacco bale handle, 5 - 90° connecting belt, 6 - upper conveyor belt, 7 - lower conveyor belt, 8 - slitter. Specific implementation mode

[0039] See Figure 1 As shown, a method for selecting and grading raw tobacco with large - flow grouped processing of the present invention includes:

[0040] Before selection, make standard samples according to the situation of the raw tobacco to be selected and process requirements; put forward specific requirements for selection based on the raw tobacco and standard samples and conduct professional training for workers. Then, conduct selection, impurity removal and grading on the raw tobacco. The specific process is as follows:

[0041] Deliver the raw tobacco bale frame to the selection station. Workers, with the assistance of machinery, take out the raw tobacco bales from the bale frame and place them on the workbench, and open the bales and recycle the gunny bags on the workbench.

[0042] Selectors conduct manual selection, impurity removal and grading of the tobacco leaves in the opened tobacco bales, and place the graded tobacco leaves of different grades in piles on the grading area of the workbench. Each pile is of the same - grade material.

[0043] Handle - placers place the graded piles of tobacco leaves on the handle - placing belt conveyor, with the head directions consistent during placement, and there are obvious gaps between piles.

[0044] According to the materials processed by the secondary - grade conveyor belt, groupers take down the piles of tobacco leaves placed on the handle - placing belt and place them on the secondary - grade material belt.

[0045] Groupers take down the piles of single - grade materials on the handle - placing belt in piles and place them on the secondary - grade belt. Each secondary - grade belt places materials of the same grade. The groupers on both sides of each secondary - grade belt only take down the corresponding - grade tobacco leaves processed by this secondary - grade belt from the handle - placing belt conveyor, and the remaining piles of tobacco leaves of other grades are retained on the handle - placing belt.

[0046] After all the secondary - grade tobacco leaves are taken down from the handle - placing belt conveyor, the remaining materials on the handle - placing belt are the main - grade materials.

[0047] So far, the selection, impurity removal and grading of the raw tobacco are completed, and each grade of tobacco leaves is output separately. Subsequently, each grade of tobacco leaves can be processed according to process requirements, such as cutting, chemical composition detection, packing, formulation, directly feeding into the production line, etc., to achieve grouped processing of single - grade tobacco leaves according to material characteristics and process requirements.

[0048] See Figure 2As shown, the raw tobacco rough separation system is first processed and produced, including:

[0049] The cigarette packs are packed in the original cigarette frame 1, which is transported to the original cigarette selection table 2. A original cigarette frame 1 is set next to each original cigarette selection table 2. During production, the cigarette packs are manually taken out from the original cigarette frame 1, placed on the original cigarette selection table 2, and the original cigarette packs are opened and the original cigarette leaves are taken out from the original cigarette packs. After taking out, the original cigarette leaves are manually loosened, picked out, and graded on the original cigarette selection table. After grading, the original cigarette leaves are placed on the swing belt conveyor 3 one by one, and the original cigarette handles 4 are formed on the swing belt conveyor 3. The weight of one original cigarette handle is about 2 kg to 2.5 kg. When placed, a relatively obvious gap should be left between the original cigarette handles 4 to facilitate the subsequent group processing personnel to carry out group processing. Figure 1 Taking the classification of raw tobacco leaves into 6 grades as an example, different grades of raw tobacco bundles 4 are indicated by different colors, and each raw tobacco bundle 4 represents a grade of tobacco leaves. The raw tobacco bundles 4 on the swing belt conveyor 3 are transported to the raw tobacco grouping processing system by the 90° belt 5.

[0050] The raw cigarette grouping processing system is mainly composed of an upper conveyor belt 6 and a lower conveyor belt 7 arranged at 90 degrees from top to bottom. The upper conveyor belt 6 is connected to the raw cigarette rough classification system to receive the raw cigarette handles 4 conveyed by the raw cigarette rough classification system. The lower conveyor belt 7 is a collection and collection conveyor belt for secondary grade materials (small proportion materials). After production and processing, the secondary grade materials are placed on different lower conveyor belts 7 for collection and transportation. Finally, all the secondary grade materials (small proportion materials) are selected and placed on the corresponding lower conveyor belts 7. The materials retained on the upper conveyor belt 6 are the main grade materials (large proportion materials).

[0051] After the materials of each grade are sorted and aggregated, each grade of materials can be processed separately according to the process requirements. This schematic diagram takes the slitting process as an example. Each group of graded materials is transported to the slitting machine 8 for slitting. Each group of materials can be set to different slitting modes according to the process requirements, such as 2-knife 3-segment slitting mode, 1-knife 2-segment slitting mode, or direct conveying mode without cutting. Different cutting lengths can be set according to the process requirements.

[0052] After each grade is separately aggregated and transported, each grade of material can be processed in addition to cutting according to the process requirements, such as formulation, packaging, etc., which will not be listed one by one.

[0053] See also Figure 3As shown, the workbench is divided into a manual selection and grading area and a post-sorting tobacco leaf placement area. The manual selection and grading area is used to select, remove impurities, and grade tobacco leaves after unpacking. A grid-shaped sieve plate is set in the manual selection and grading area of ​​the workbench, so that the impurities and fragments mixed between the tobacco leaves during the manual shaking of the tobacco leaves fall into the collection box below the workbench; a hole-shaped debris discarding port is set on both sides of the manual standing station in the selection and grading area, so that the unqualified tobacco leaves, hemp silk and other debris that are selected can be manually discarded and discharged into the collection box below the workbench. A grid-shaped sieve plate is also set in the area where tobacco leaves of different grades are piled after sorting, so that the debris generated during the placement process can be discharged; a hole-shaped debris discarding port is set to facilitate the discharge of unqualified materials found accidentally. This setting also makes it convenient for the tobacco leaf placement area after sorting to be used as an impurity removal and selection station when there is no grading requirement but only impurity removal requirements for processing the leaves.

[0054] See also Figure 4 As shown, a workbench debris and sundries discharge hopper is arranged under the entire workbench surface, and a debris and sundries collection hopper is arranged below.

[0055] See also Figure 5 As shown, each picking station is equipped with at least one raw tobacco frame, and one station is set to operate the auxiliary robot arm to take the raw tobacco packs out of the frame, place them on the workbench, and open the packs, collect sacks, and clean up scattered tobacco leaves. Each workbench is equipped with two stations to select and grade raw tobacco, and place the selected tobacco leaves in piles according to grade. Each workbench is equipped with two stations to place the graded tobacco leaves in piles and put them on the line.

[0056] See also Figure 6 As shown, the tobacco leaf stackers place the tobacco leaves, which have been cleaned and graded, in piles on the handlebar belt. When placing the tobacco leaves, the heads of the leaves are in the same direction, and there are obvious gaps between the piles.

[0057] See also Figure 7 As shown, the raw cigarette bundles 4 conveyed by the raw cigarette rough classification system enter the raw cigarette grouping processing system. Taking the classification of raw cigarettes into 7 grades as an example, different colors are used to indicate the 4 raw cigarette bundles of different grades.

[0058] The raw tobacco leaves 4 are conveyed by the upper conveyor belt 6 to the lower conveyor belt 7 which is staggered at 90 degrees with the upper conveyor belt 6 and distributed up and down. People stand at the intersection of the conveyor belts and manually take the tobacco leaves of the corresponding grade that need to be taken off from the upper conveyor belt 6 and place them on the corresponding lower conveyor belt 7. Figure 3As shown, from top to bottom, the first lower conveyor belt 7 is for grade A materials, the second is for grade B materials, the third is for grade C materials, the fourth is for grade D materials, the fifth is for grade E materials, and the sixth is for grade F materials. When the raw tobacco leaves 4 pass through all the lower conveyor belts 7, all the secondary materials (small proportion materials) are taken off and placed on the corresponding lower conveyor belts 7, and the materials left on the upper conveyor belt 6 are the main grade materials (large proportion materials). At this point, the raw tobacco grouping processing system divides the raw tobacco leaves into 6 secondary grade materials (small proportion materials) and 1 main grade material (large proportion material), a total of 7 material grades.

[0059] The system has flexible configuration, which is reflected in:

[0060] According to the maximum number of sub-grade materials required by process grading, the number of 7 lower conveyor belts can be set to meet the grading of multiple grades of materials;

[0061] When the amount of a certain secondary material is large and one 7-lower-layer conveyor belt cannot meet its processing and production requirements, two 7-lower-layer conveyor belts can be used for production and processing;

[0062] When a batch of cigarettes does not need to be divided into 7 grades but only into 5 grades, the two 7 lower conveyor belts can be left unoccupied or used to produce secondary grade materials that account for a larger proportion.

[0063] The specific implementation is not limited to the above.

Claims

1. A method for selecting and grading raw tobacco for large-volume group processing, characterized in that: The method includes: Place the tobacco leaves that have been cleaned and graded by static selection in piles on the original tobacco selection and grouping workbench; The graded tobacco leaves are piled on the swing belt conveyor, and the group workers take down the tobacco leaves of the grade to be sorted and place them on the secondary grade conveyor belt below the swing belt and perpendicular to the swing belt conveyor; On the secondary conveyor belt, single-grade materials are graded according to the standard sample and selection requirements; each secondary conveyor belt is a single-grade material corresponding to the standard sample, and each grade of material can be processed in the subsequent process according to the process requirements, realizing the group processing of single-grade materials; The swing belt conveyors are provided with several parallel ones, each swing belt conveyor is connected with several upper conveyor belts at the same height, and below each upper conveyor belt are several lower conveyor belts perpendicular to the upper conveyor belt in the horizontal plane, and each lower conveyor belt corresponds to a tobacco leaf grade.

2. The method for selecting and grading raw cigarettes for large-flow group processing according to claim 1 is characterized in that: Before selecting the raw tobacco, standard samples are made according to the raw tobacco conditions and subsequent process requirements, and the selection and grouping personnel are trained according to the standard samples and selection requirements so that they can select and grade according to the standard samples and selection requirements.

3. The method for selecting and grading raw cigarettes for large-volume grouping processing according to claim 1 is characterized in that: The raw cigarette selection and grouping workbenches are provided with a plurality of groups, and each group of raw cigarette selection workbenches is correspondingly configured with raw cigarette frames to be selected.

4. The method for selecting and grading raw cigarettes for large-volume grouping processing according to claim 3 is characterized in that: The cigarette packs are transported to the raw cigarette selection and grouping workbench for unpacking.

5. The method for selecting and grading raw cigarettes for large-volume group processing according to claim 4 is characterized in that: The raw tobacco selection and grouping workbench is divided into a manual selection and grading area and an area where tobacco leaves of different grades are piled after sorting. The manual selection and grading area is used to select, remove impurities and grade tobacco leaves after unpacking. A grid-shaped sieve plate is set in the manual selection and grading area, so that the debris and fragments mixed between the tobacco leaves during the manual shaking process fall into the collection box under the workbench; a hole-shaped debris discarding port is set on both sides of the manual standing station in the manual selection and grading area, which is used to manually discard the unqualified tobacco leaves, hemp silk and other debris and discharge them into the collection box under the workbench; a grid-shaped sieve plate is also set in the area where tobacco leaves of different grades are piled after sorting, which is used to discharge the debris generated during the placement process; The manual selection and grading area is also provided with a porous debris discarding port for discharging unqualified materials discovered accidentally, or when there is no grading requirement but only impurity removal requirement for processing the leaves, the tobacco leaf placement area after grading is used as an impurity removal and selection station. In the manual sorting and grading area, the unpacked tobacco leaves are manually shaken, sorted and graded, and the debris and fragments are separated from the tobacco leaves and put into the debris collection box under the workbench; Manually grade qualified tobacco leaves according to standard samples, and place the graded tobacco leaves in piles in the area where the graded tobacco leaves are placed in piles. Each pile of tobacco leaves is the same grade as the standard sample, and the heads are placed in the same direction; The tobacco leaf pickers pile the selected and graded tobacco leaves on the belt of the tobacco leaf picker, leaving some space between the piles. The group workers take the piles of single-grade materials on the swing belt as a unit and place them on the sub-grade belt which is set below the swing belt and perpendicular to the swing belt. Each sub-grade belt is placed with materials of the same grade. The group workers on both sides of each sub-grade belt only take the tobacco leaves of the corresponding grade processed by the sub-grade belt from the swing belt, and the piles of tobacco leaves of other grades are kept on the swing belt. After all the secondary grade tobacco leaves are taken off the swing belt conveyor, the remaining materials on the swing belt are the primary grade materials, completing the grouping of tobacco leaves; Inspection is carried out through the method of small group table inspection and large group inspection to carry out quality inspection of selection and grading.

6. The method for selecting and grading raw cigarettes for large-volume group processing according to claim 5 is characterized in that: The lower conveyor belt outputs raw cigarettes of different grades separately, and then performs corresponding subsequent process processing according to the process requirements. The subsequent process processing includes cutting, framing, warehousing, formulation or direct online.

7. The method for selecting and grading raw tobacco for large-volume group processing according to claim 6 is characterized in that: The cutting process includes: Tobacco leaves output by different sub-grade belts are cut differently according to process requirements, including no cutting, one knife two sections, two knives three sections and cutting the handle. When different sub-grade belt materials are cut, different cutting length parameters are set according to process requirements.

8. The method for selecting and grading raw tobacco for large-volume group processing according to claim 5 is characterized in that: The methods of small group desk inspection and large group inspection include: Every 2 to 4 workstations form a small group, with small group inspectors to monitor the quality of leaf selection; 2 to 4 small groups form a large group, with a large group inspector to control the quality of leaf selection.

9. A raw tobacco selection and grading system for large-volume group processing, characterized in that: A method for selecting and grading raw cigarettes for realizing the large-flow grouping processing described in any one of claims 1 to 8, the system comprising: A raw cigarette workbench (2) and a raw cigarette frame (1), wherein cigarette packages are placed in the raw cigarette frame (1) and transported from the raw cigarette frame (1) to the raw cigarette workbench (2), and at least one raw cigarette frame (1) is arranged next to each raw cigarette workbench (2). A swinging belt conveyor (3) for placing raw tobacco stems (4) of tobacco leaves of different grades; The upper conveyor belt (6) is connected to the swing belt conveyor (3) through a 90° joint belt (5) and is used to receive the original tobacco stems (4) of different grades of tobacco leaves conveyed by the swing belt conveyor (3) and retain the main grade materials; The lower conveyor belt (7) is located below the upper conveyor belt (6) and is arranged in a 90° staggered manner on the horizontal plane. The lower conveyor belt (7) is provided with a plurality of belts for placing, collecting and gathering secondary materials. After the materials of each grade are sorted and grouped, each group of grade materials can be processed separately according to the process requirements.

10. The raw tobacco selection and grading system for large-volume group processing according to claim 9 is characterized in that: Also includes: Each group of graded materials is separately conveyed to a slitting machine (8) for slitting processing, and each group of materials can be subjected to different slitting settings according to process requirements.

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