Flue-cured tobacco grading workbench convenient for collecting sundries
By introducing a debris collection box, grid plate, sieve plate and vibrator into the flue-cured tobacco grading workbench, the problems of cumbersome debris handling and large tobacco leaf recycling have been solved, realizing the automated separation and resource utilization of debris, and improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN TOBACCO CO YONGZHOU
- Filing Date
- 2025-04-10
- Publication Date
- 2026-05-15
AI Technical Summary
The existing flue-cured tobacco grading workbench lacks the functions of collecting debris and recycling large tobacco leaves, resulting in cumbersome debris handling, equipment pollution, decreased air quality, and low production efficiency.
A flue-cured tobacco grading workbench was designed, comprising a debris collection box, a grating plate, a hopper, a screen plate, and a bin wall vibrator. The grating plate filters impurities, the screen plate intercepts large tobacco leaves, the hopper collects solid impurities, and the vibrator ensures continuous operation, thereby achieving automated separation and recycling of debris.
It enables efficient collection of debris and recycling of large tobacco leaves, reduces raw material waste, ensures product quality and production efficiency, and improves the working environment.
Smart Images
Figure CN224234724U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tobacco leaf grading technology, and in particular to a flue-cured tobacco grading workbench that facilitates the collection of debris. Background Technology
[0002] Tobacco grading is a crucial step in tobacco processing. Its purpose is to classify tobacco leaves based on indicators such as maturity, color, size, and integrity after curing, directly impacting the quality and economic value of the leaves. Traditional tobacco grading workbenches are typically operated manually. During the sorting process, workers generate a large amount of broken tobacco leaves, stems, dust, sand, and other impurities. If these debris are not cleaned promptly, they not only contaminate the grading table, leading to secondary mixing of tobacco leaves, but also potentially affect workshop air quality due to dust dispersion, threatening worker health. Furthermore, accumulated debris can clog equipment gaps, increasing equipment failure rates and reducing grading efficiency.
[0003] Existing flue-cured tobacco grading workbenches typically lack debris collection capabilities, so debris is primarily handled through manual, periodic cleaning. This method increases the workload and reduces production efficiency. Furthermore, workers generate some larger tobacco leaves during sorting, which are usually mixed in with debris and require manual removal and recycling later—a tedious, time-consuming, and labor-intensive process.
[0004] In view of this, the present invention provides a new solution to the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a flue-cured tobacco grading workbench that facilitates the collection of debris, which solves the problem that existing flue-cured tobacco grading workbenches do not have debris collection and large tobacco leaf recycling functions.
[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:
[0007] A tobacco grading workbench that facilitates the collection of debris includes:
[0008] Miscellaneous item collection box;
[0009] A grating panel, which is detachably installed on the top of the debris collection box;
[0010] The hopper is located below the debris collection box;
[0011] The first discharge pipe is located at the bottom of the hopper;
[0012] A sieve plate is located below the grid plate and is inclinedly disposed inside the debris collection box. The sieve plate is used to intercept large tobacco leaves in flue-cured tobacco impurities.
[0013] The second discharge pipe is located outside the debris collection box and near the lower side of the sieve plate, and is connected to the debris collection box.
[0014] A bin vibrator is installed on the outside of the hopper or the debris collection box.
[0015] A further preferred embodiment is that the sieve plate comprises an upper soft layer and a lower hard layer, wherein the soft layer and the hard layer are fixedly connected.
[0016] A further preferred embodiment is that the upper surface of the soft layer is provided with a plurality of soft protrusions, or the upper surface of the soft layer is provided with a textured surface.
[0017] A further preferred embodiment is that: a positioning hole is provided on the top of the debris collection box, and a positioning post adapted to the positioning hole is fixed on the grid plate, the positioning post being inserted into the positioning hole.
[0018] A further preferred embodiment is that the first discharge pipe is equipped with a switch mechanism for controlling the discharge of material from the hopper.
[0019] A further preferred embodiment is that the switching mechanism includes a partition, the inner wall of the first discharge pipe has a groove for accommodating the edge of the partition, and one side of the first discharge pipe has a socket for inserting the partition, the socket being in communication with the groove.
[0020] A further preferred embodiment is that the switching mechanism further includes a lug, which is located outside the first discharge pipe and fixed to one side of the partition.
[0021] A further preferred embodiment is that the switching mechanism further includes a limiting block, which is used to contact the outer surface of the first discharge pipe, and the limiting block and the support lug are both fixed on the same side of the partition.
[0022] A further preferred embodiment is that the sieve plate is detachably disposed inside the debris collection box, and a support leg is provided below the debris collection box.
[0023] A further preferred embodiment is that a support platform is fixed to the inner wall of the debris collection box, the support platform is supported at the bottom of the sieve plate, and the sieve plate is connected to the support platform by screws or bolts.
[0024] In summary, this utility model has the following beneficial effects:
[0025] This utility model discloses a flue-cured tobacco grading workbench, comprising a debris collection box, a grid plate, a hopper, a first discharge pipe, a sieve plate, a second discharge pipe, and a bin vibrator. The grid plate is detachably installed on the top of the debris collection box. The hopper is located below the debris collection box. The first discharge pipe is located at the bottom of the hopper. The sieve plate is located below the grid plate and is inclined inside the debris collection box. The sieve plate is used to intercept large tobacco leaves in the flue-cured tobacco impurities. The second discharge pipe is located outside the debris collection box and close to the lower side of the sieve plate. The second discharge pipe is connected to the debris collection box. The bin vibrator is installed outside the hopper or the debris collection box.
[0026] During manual grading, many large tobacco leaf fragments (length ≥ 3 cm, width ≥ 1.5 cm) fall into the debris collection box along with dust, mud, and tobacco stems. These large tobacco leaves can be re-screened and used in lower-grade tobacco bales or reconstituted tobacco. Therefore, this invention incorporates a sieve plate inside the debris collection box to intercept large tobacco leaves from the flue-cured tobacco impurities. This achieves efficient recycling and resource utilization, reducing raw material waste and ensuring product quality. The hopper collects solid impurities such as mud, dust, and tobacco leaf fragments after filtration by the grating and sieve plates, while the first discharge pipe discharges these solid impurities. This solves the problem of existing flue-cured tobacco grading workbenches lacking debris collection and large tobacco leaf recycling functions. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of the flue-cured tobacco grading workbench in Embodiment 1 of this utility model;
[0028] Figure 2 This is a cross-sectional view of the tobacco grading workbench in Embodiment 1 of this utility model;
[0029] Figure 3 This is a schematic diagram of the positioning hole structure in Embodiment 1 of this utility model;
[0030] Figure 4 This is a schematic diagram of the switching mechanism structure of Embodiment 1 of this utility model;
[0031] Figure 5 This is a cross-sectional view of the first discharge pipe in Embodiment 1 of this utility model;
[0032] Figure 6 This is a partial structural diagram of the sieve plate in Embodiment 1 of this utility model;
[0033] Figure 7 This is a partial structural diagram of the sieve plate in Embodiment 2 of this utility model.
[0034] In the diagram, 1. Miscellaneous collection box; 2. Grating plate; 3. Support leg; 4. Hopper; 5. Bin wall vibrator; 6. First discharge pipe; 7. Second discharge pipe; 8. Switching mechanism; 81. Partition plate; 82. Support lug; 83. Limiting block; 9. Screen plate; 10. Support platform; 11. Positioning hole; 12. Groove; 13. Insertion port; 14. Soft protrusion. Detailed Implementation
[0035] The present invention will be further described in detail below with reference to the accompanying drawings.
[0036] Example 1: A tobacco grading workbench that facilitates the collection of debris, such as... Figure 1-6 As shown, the system includes a debris collection box 1, a grating plate 2, a hopper 4, a first discharge pipe 6, a sieve plate 9, a second discharge pipe 7, a bin vibrator 5, and support legs 3. The debris collection box 1 has a rectangular frame structure with openings at the top and bottom. Four support legs 3 are rectangularly distributed below the debris collection box 1, with their upper ends fixed to the bottom of the box or the outer wall of the hopper 4. The hopper 4 is fixed to the bottom of the debris collection box 1 and is used to collect broken tobacco leaves, stems, dust, and silt generated during the tobacco grading process. The grating plate 2 is detachably installed on the top of the debris collection box 1. During the tobacco grading process, the tobacco is placed on the grating plate 2. The grating plate 2 is mainly used to filter out broken tobacco leaves (leaves with a damaged area <10%), stems, dust, and silt from the tobacco. Specifically, the holes on the grating plate 2 are rectangular and 3-5 cm wide.
[0037] The general procedure for grading flue-cured tobacco on the grading workbench is as follows:
[0038] I. Preliminary screening and classification: The tobacco leaves are roughly classified according to their parts (bottom leaves, lower second leaves, middle leaves, etc.) to avoid mixing different parts.
[0039] Second, preliminary classification is carried out based on color (lemon yellow, orange yellow, reddish brown) and maturity (field maturity, graded maturity).
[0040] III. Sensory Inspection and Grading: Visual Inspection: Check leaf structure (loose / dense), oil content (sufficient / medium / low), color (strong / weak) and damaged area; Touch Inspection: Perceive leaf texture (soft / rough) and quality (moderate / thick / thin); Smell Inspection: Identify the aroma characteristics of tobacco leaves and eliminate interference from grassy or other off-odors.
[0041] During the grading process, non-tobacco materials must be controlled. Waste such as cut binding tape must be disposed of in designated recycling bins and must not be mixed with tobacco leaves. Additionally, tobacco leaves contain solid impurities such as dust and sand. During manual grading, fragments such as broken tobacco leaves and stems are also generated. If these solid impurities, fragments, and debris are not removed, they will affect the purity and grade of the tobacco leaves. Therefore, this invention includes a debris collection box 1 and a grid plate 2. When the tobacco leaves are graded on the grid plate 2, dust, sand, broken tobacco leaves, stems, and other substances in the tobacco leaves will fall into the debris collection box 1 through the grid plate 2, thus achieving precise and standardized grading management of the tobacco leaves.
[0042] Preferably, the grating plate 2 is made of plastic and has a certain degree of elasticity.
[0043] Plastic grating 2 is inexpensive and has a certain degree of elasticity, making it easy to shake off solid impurities such as dust, broken leaves, and mud.
[0044] Preferably, the top of the debris collection box 1 has four positioning holes 11, which are distributed in pairs on both sides of the length direction of the debris collection box 1. The grid plate 2 is fixed with four positioning posts that are adapted to the four positioning holes 11. The four positioning holes 11 correspond one-to-one with the four positioning posts, and the positioning posts are used to be inserted into the positioning holes 11.
[0045] One purpose of the detachable design of the grating panel 2 is to facilitate cleaning or replacement. Grating panel 2 is prone to blockage or damage after prolonged use, hence the detachable design. Another purpose is to allow for easy removal of the grating panel 2 to inspect the interior of the debris collection bin 1, offering greater flexibility. Removal is simple; just lift the grating panel 2 upwards.
[0046] During manual grading, many larger tobacco leaf fragments (length ≥ 3 cm, width ≥ 1.5 cm) fall into the debris collection bin 1 along with dust, mud, and tobacco stems. These large tobacco leaves can be re-screened and used in lower-grade tobacco packs or reconstituted tobacco, thus achieving efficient recycling and resource utilization, reducing raw material waste, and ensuring product quality. Therefore, this invention includes a sieve plate 9 inside the debris collection bin 1 to intercept large tobacco leaves among the flue-cured tobacco impurities.
[0047] Preferably, the sieve holes on the sieve plate 9 are round holes with a diameter of 3cm, or the sieve holes on the sieve plate 9 are rectangular holes with a diameter of 3cm × 1.5cm. A plurality of sieve holes are provided, and the plurality of sieve holes are evenly distributed on the sieve plate 9.
[0048] In the above solution, by adding a sieve plate 9 inside the debris collection box 1, the effective interception and recycling of large-sized tobacco leaf fragments is achieved. The sieve plate 9 with a pore size of 3cm accurately intercepts usable tobacco leaf fragments with a length ≥3cm and a width ≥3cm or a length ≥3cm and a width ≥1.5cm, while allowing smaller impurities such as dust and sand to pass through.
[0049] Preferably, the sieve plate 9 is located below the grid plate 2 and is inclined inside the debris collection box 1, with an inclination angle preferably of 5-15°. The second discharge pipe 7 is located outside the debris collection box 1 and close to the lower side of the sieve plate 9, and the second discharge pipe 7 is connected to the debris collection box 1.
[0050] In the above scheme, the inclined installation structure of the sieve plate 9 can promote the automatic sliding of impurities and improve the separation efficiency. The separated large tobacco leaf fragments will be discharged outward through the second discharge pipe 7.
[0051] To improve separation and discharge efficiency and prevent blockage of the grating plate 2, screen plate 9, first discharge pipe 6 and second discharge pipe 7, this utility model has a bin wall vibrator 5 installed on the outside of the hopper 4 or debris collection box 1 to ensure continuous operation stability.
[0052] More preferably, the sieve plate 9 includes an upper soft layer and a lower hard layer, with the soft layer adhered to the upper surface of the hard layer and reinforced by screws or other means.
[0053] Specifically, the soft layer is made of silicone or rubber with a smooth, flat surface. The hard layer is made of stainless steel, hard alloy, or engineering plastic.
[0054] In the above technical solution, large tobacco leaf fragments will rub or collide with the screen plate 9 during the feeding process. To reduce the breakage of large tobacco leaf fragments, the screen plate 9 of this utility model adopts a composite structure of "soft layer + hard layer". The silicone / rubber layer (soft layer) absorbs the impact force when tobacco leaf fragments come into contact with the screen plate 9 through elastic deformation, reducing leaf breakage or tissue damage caused by rigid collision, and maintaining the integrity of tobacco leaves to meet recycling standards. Hard materials such as stainless steel provide rigid support to ensure that the screen plate 9 maintains a stable shape during vibrating screening, preventing the soft layer from deforming due to uneven force, which would affect the accuracy of the screen hole size. The soft layer is fixed to the hard layer by bonding to form a continuous screen surface, which can intercept large tobacco leaves while allowing fine impurities (such as mud, sand, and broken stems) to pass through the screen holes, achieving layered filtration. The surface of the soft layer adopts a smooth planar design, which can reduce the clogging of the screen plate 9 and facilitate the smooth sliding of impurities.
[0055] Preferably, the sieve plate 9 is detachably installed inside the debris collection box 1.
[0056] In a further preferred embodiment, a support platform 10 is fixed to the inner wall of the debris collection box 1. The support platform 10 is supported on the bottom of the higher and lower sides of the sieve plate 9, and the sieve plate 9 is connected to the support platform 10 by screws or bolts.
[0057] The sieve plate 9 is removable, making it easy to clean clogging materials (such as stuck tobacco fibers) or replace the sieve plate 9. To check the inside of the debris collection box 1, the grid plate 2 can be removed to inspect the sieve plate 9.
[0058] Reference Figure 1-6 The hopper 4 is located below the debris collection box 1. The hopper 4 is used to collect solid impurities such as mud, dust, and tobacco leaf debris after being filtered by the grid plate 2 and the screen plate 9. The first discharge pipe 6 is located at the bottom of the hopper 4 and is used to discharge these solid impurities outward.
[0059] Preferably, a switch mechanism 8 is provided on the first discharge pipe 6 to control the discharge of material in the hopper 4.
[0060] More preferably, the switching mechanism 8 includes a partition 81, a support lug 82, and a limiting block 83. The first discharge pipe 6 is a rectangular or square pipe. A groove 12 for accommodating the edge of the partition 81 is formed on the inner wall of the first discharge pipe 6. A socket 13 for inserting the partition 81 is formed on one side of the first discharge pipe 6. The socket 13 communicates with the groove 12 on the inner wall of one side of the first discharge pipe 6, so that the partition 81 is automatically inserted into the groove 12 through the socket 13. The support lug 82 is located outside the first discharge pipe 6 and fixed to one side of the partition 81. The limiting block 83 is used to contact the outer surface of the first discharge pipe 6. Both the limiting block 83 and the support lug 82 are fixed to the same side of the partition 81. Two limiting blocks 83 are provided, symmetrically arranged on both sides of the support lug 82. When the limiting block 83 contacts the outer surface of the first discharge pipe 6, the partition 81 is inserted into the groove 12.
[0061] In the above technical solution, the partition 81 forms a physical barrier by embedding itself into the groove 12 through the socket 13, effectively blocking the channel of the first discharge pipe 6 and preventing impurities from being accidentally discharged when not discharging. The rectangular / square pipe cross-section design increases the contact area between the partition 81 and the pipe wall, reducing the risk of seal failure due to material impact. The lugs 82 are mainly designed to facilitate pushing the partition 81. Holding the lugs 82 allows the partition 81 to be pushed inward or outward, thereby closing or opening the first discharge pipe 6. The limiting block 83 allows the partition 81 to automatically align with the pipe wall when inserted, simplifying manual adjustment steps and making it simple and convenient to use.
[0062] Example 2: A tobacco grading workbench that facilitates the collection of debris, such as... Figure 7 As shown, the difference from Embodiment 1 is that the upper surface of the soft layer is provided with a plurality of soft protrusions 14, or the upper surface of the soft layer is provided with a textured surface.
[0063] Preferably, the soft protrusion 14 is made of the same material as the soft layer, and the soft protrusion 14 is disposed between adjacent sieve holes.
[0064] The soft protrusions 14 and the textured surface increase the contact area, slowing down the downward movement of the tobacco leaves and improving screening time and separation accuracy. In addition, the soft protrusions 14 also enhance buffering and shock absorption, improving the protection of the tobacco leaves.
[0065] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. A tobacco grading workbench that facilitates the collection of debris, characterized in that: include: Miscellaneous item collection box (1); A grating plate (2) is detachably installed on the top of the debris collection box (1); Hopper (4), the hopper (4) is located below the debris collection box (1); The first discharge pipe (6) is located at the bottom of the hopper (4); A sieve plate (9) is located below the grid plate (2) and is inclined inside the debris collection box (1). The sieve plate (9) is used to intercept large tobacco leaves in the flue-cured tobacco impurities. The second discharge pipe (7) is located outside the debris collection box (1) and close to the lower side of the sieve plate (9). The second discharge pipe (7) is connected to the debris collection box (1). A bin wall vibrator (5) is installed on the outside of the hopper (4) or the debris collection box (1).
2. The tobacco grading workbench for easy collection of debris as described in claim 1, characterized in that: The sieve plate (9) includes an upper soft layer and a lower hard layer, and the soft layer and the hard layer are fixedly connected.
3. The tobacco grading workbench for easy collection of debris as described in claim 2, characterized in that: The upper surface of the soft layer is provided with a plurality of soft protrusions (14), or the upper surface of the soft layer is provided with a textured surface.
4. The tobacco grading workbench for easy collection of debris as described in claim 1, characterized in that: The top of the debris collection box (1) is provided with a positioning hole (11), and a positioning post that is adapted to the positioning hole (11) is fixed on the grid plate (2). The positioning post is used to be inserted into the positioning hole (11).
5. The tobacco grading workbench for easy collection of debris as described in claim 1, characterized in that: The first discharge pipe (6) is equipped with a switch mechanism (8) for controlling the discharge of materials in the hopper (4).
6. The tobacco grading workbench for easy collection of debris as described in claim 5, characterized in that: The switching mechanism (8) includes a partition (81), and the inner wall of the first discharge pipe (6) is provided with a groove (12) for accommodating the edge of the partition (81). A socket (13) for inserting the partition (81) is provided on one side of the first discharge pipe (6), and the socket (13) communicates with the groove (12).
7. A tobacco grading workbench for easy collection of debris as described in claim 6, characterized in that: The switching mechanism (8) also includes a lug (82), which is located outside the first discharge pipe (6) and fixed to one side of the partition (81).
8. A tobacco grading workbench for easy collection of debris as described in claim 7, characterized in that: The switching mechanism (8) also includes a limiting block (83), which is used to contact the outer surface of the first discharge pipe (6). The limiting block (83) and the support lug (82) are both fixed on the same side of the partition (81).
9. A tobacco grading workbench for easy collection of debris as described in claim 1, characterized in that: The sieve plate (9) is detachably installed inside the debris collection box (1), and a support leg (3) is provided below the debris collection box (1).
10. A tobacco grading workbench for easy collection of debris as described in claim 9, characterized in that: The inner wall of the debris collection box (1) is fixed with a support platform (10), which is supported at the bottom of the sieve plate (9). The sieve plate (9) is connected to the support platform (10) by screws or bolts.