Curing system for tobacco

Abstract

The application discloses a flue-cured tobacco grading system, and belongs to the technical field of tobacco production equipment. The main purpose is to solve the core problem that tobacco leaves are difficult to be synchronously separated from tobacco residues and non-tobacco substances in the traditional flue-cured tobacco grading system, to improve the grading operation efficiency, and to guarantee the purity of tobacco leaves to meet the subsequent production requirements. The main technical scheme of the application is that the flue-cured tobacco grading system comprises a first grading table, a second grading table, and a tobacco exchange area and a grading area arranged in sequence along a tobacco processing flow; the first grading table is arranged in the tobacco exchange area and extends along a first direction; the second grading table is arranged in the grading area, is connected with the first grading table, and extends along a horizontal direction perpendicular to the first direction; wherein the tabletops of the first grading table and the second grading table are both of a fence type structure, and the fence type structure is formed with gaps for tobacco residues and non-tobacco substances to pass through.

Description

Technical Field

[0001] This application belongs to the technical field of tobacco production equipment, specifically relating to a flue-cured tobacco grading system. Background Technology

[0002] During the grading process of flue-cured tobacco, non-tobacco substances such as soil, sand, and weeds carried from the field easily adhere to the surface of the tobacco leaves. Furthermore, some leaf debris, such as broken veins and leaf edges, is generated during harvesting and transportation. If these impurities are not effectively separated before grading, they will not only interfere with the graders' judgment of the tobacco leaf grade but will also enter subsequent processes with qualified tobacco leaves, increasing the impurity removal pressure in the threshing and re-drying stage and even affecting the sensory quality of the final cigarette product.

[0003] Traditional flue-cured tobacco grading systems use grading tables with solid steel or wooden surfaces. These tables have a single function: supporting the tobacco leaves. They cannot achieve real-time, synchronous separation of tobacco leaves from debris and non-tobacco substances, directly impacting grading efficiency. Workers must spend extra time manually cleaning accumulated debris and impurities from the tabletop in addition to normal grading operations, frequently interrupting the grading process and reducing efficiency per unit time. Furthermore, the removal of debris and non-tobacco substances from the tobacco leaves relies entirely on manual picking, significantly increasing the workload and further reducing efficiency. Manual picking is particularly ineffective for removing small, lightweight impurities such as dust, ultimately resulting in unsatisfactory overall removal of debris and non-tobacco substances, failing to meet the purity requirements of subsequent production. Utility Model Content

[0004] In view of this, this application provides a flue-cured tobacco grading system, the main purpose of which is to solve the core problem of the difficulty in simultaneously separating tobacco leaves from debris and non-tobacco substances in traditional flue-cured tobacco grading systems, thereby improving the efficiency of grading operations while ensuring the purity of tobacco leaves to meet subsequent production requirements.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions:

[0006] This application provides a flue-cured tobacco grading system, including:

[0007] The tobacco exchange area and grading area are set up sequentially along the tobacco processing flow;

[0008] A first grading table is disposed within the smoking exchange area and extends along a first direction;

[0009] The second grading table is disposed within the grading area and is connected to the first grading table and extends in a horizontal direction perpendicular to the first direction;

[0010] The tabletops of both the first and second grading tables have a fence-like structure, which forms gaps for tobacco leaf debris and non-tobacco substances to pass through.

[0011] Optionally, the fence structure consists of several spaced-apart rods, and each of the rods can rotate about its own axis.

[0012] Optionally, when the rods of the first grading table are rotatable along their own axis, they generate a conveying driving force along the first direction, thereby driving the tobacco leaves placed on the tabletop of the first grading table to move along the feed end of the first grading table toward the direction of the second grading table.

[0013] Optionally, when the rods of the second grading table are rotatable along their own axis, they generate a conveying driving force in a horizontal direction perpendicular to the first direction, so as to drive the tobacco leaves entering the second grading table from the discharge end of the first grading table to move towards both ends of the second grading table along the extension direction of the second grading table.

[0014] Optionally, the spacing between the plurality of rods of the first grading table is greater than the spacing between the plurality of rods of the second grading table.

[0015] Optionally, a collection plate is provided under the tabletop of both the first grading table and the second grading table. The collection plate is used to collect tobacco leaf debris and non-tobacco substances that fall through the gaps in the fence structure.

[0016] Optionally, the edge of the collecting plate extends beyond the horizontal projection range of the fence structure.

[0017] Optionally, the cross-section of the collecting plate gradually narrows from the edge to the center to form a receiving surface in the edge area of ​​the collecting plate for receiving tobacco debris and non-smoking substances falling through the gaps in the fence structure, and a converging opening is formed in the center to cooperate with the receiving surface to guide the tobacco debris and non-smoking substances to slide down from the edge to the converging opening in the center.

[0018] Optionally, a collection box can be detachably installed at the bottom of the collection plate corresponding to the position of the converging port. The top opening of the collection box is sealed and connected to the converging port to receive tobacco leaf debris and non-tobacco substances that slide down from the converging port.

[0019] Optionally, the side wall of the collection box is provided with a transparent observation window for real-time observation of the accumulation of tobacco debris and non-tobacco substances inside the collection box.

[0020] By employing the above technical solution, this application has at least the following beneficial effects:

[0021] The flue-cured tobacco grading system provided in this application, by designing both the first and second grading tables as a fence-like structure, utilizes the gaps between the tables to allow non-tobacco substances such as soil, sand, and weeds adhering to the surface of the tobacco leaves during placement, sorting, and transfer, as well as tobacco leaf debris such as leaf vein fragments and leaf edge fragments generated during harvesting and transportation, to fall off naturally without manual intervention. This allows for simultaneous grading operations and impurity separation. Therefore, it avoids interruptions to the grading process due to manual impurity removal, allowing staff to focus on tobacco leaf grading judgment, reducing ineffective work time, directly increasing the amount of tobacco leaves graded per unit time, and reducing labor costs. Compared to manual sorting, it covers a wider range of impurities, especially solving the problem of small, lightweight impurities that are difficult to remove manually. It improves the purity of tobacco leaves from the grading source, prevents impurities from interfering with the grading personnel's accurate judgment of tobacco leaf grades, effectively improves the removal of debris and non-tobacco substances from tobacco leaves, and ultimately meets the purity requirements of subsequent production. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a flue-cured tobacco grading system according to an optional embodiment of this application;

[0023] Figure 2 This is a structural schematic diagram of a first or second tiered table according to an optional embodiment of this application;

[0024] Figure 3 for Figure 2 Sectional view at point AA.

[0025] The reference numerals in the attached figures are as follows:

[0026] 100. Tobacco Exchange Area; 200. Graded Area; 300. First Graded Table; 400. Second Graded Table;

[0027] 1. Fence-type structure; 11. Rods; 2. Collection plate; 21. Receiving surface; 22. Convergence port; 3. Collection box; 31. Observation window. Detailed Implementation

[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0032] See also Figures 1 to 3 As shown in the embodiments of this application, a flue-cured tobacco grading system is provided, including a first grading table 300, a second grading table 400, and a tobacco exchange area 100 and a grading area 200 arranged sequentially along the tobacco processing flow; the first grading table 300 is disposed in the tobacco exchange area 100 and extends along a first direction; the second grading table 400 is disposed in the grading area 200, and is connected to the first grading table 300 and extends along a horizontal direction perpendicular to the first direction; wherein, the tabletops of the first grading table 300 and the second grading table 400 are both fence-type structures 1, and the fence-type structure 1 forms gaps for tobacco leaf debris and non-tobacco substances to pass through.

[0033] The flue-cured tobacco grading system provided in the embodiments of this application, by setting both the first grading table 300 and the second grading table 400 as a fence-type structure 1, utilizes the gaps between the tabletops to allow non-tobacco substances such as soil, sand, and weeds adhering to the surface of the tobacco leaves during placement, sorting, and transfer, as well as tobacco leaf debris such as leaf vein fragments and leaf edge fragments generated during harvesting and transportation, to fall off naturally without manual intervention. This achieves simultaneous grading operations and impurity separation. Therefore, it avoids interruptions in the grading process due to manual impurity removal, allowing workers to focus on tobacco leaf grading judgment, reducing ineffective work time, directly increasing the amount of tobacco leaves graded per unit time, and reducing labor costs. Compared to manual picking, it covers a wider range of impurities, especially solving the problem of small, lightweight impurities being difficult to remove manually. It improves the purity of tobacco leaves from the grading source, prevents impurities from interfering with the grading personnel's accurate judgment of tobacco leaf grades, effectively improves the removal effect of debris and non-tobacco substances in tobacco leaves, and ultimately meets the requirements for tobacco leaf purity in subsequent production.

[0034] Among them, the tobacco delivery area 100 is the first station for tobacco leaves to enter the flue-cured tobacco grading system. It can receive tobacco leaves to be graded, such as tobacco delivered by growers and tobacco unloaded by transport vehicles. The initial receiving and sorting of tobacco leaves is completed here.

[0035] Specifically, the tobacco exchange area 100 is equipped with a first grading table 300, which extends along a first direction for sorting tobacco leaves during the exchange process. Here, the first direction can be understood as horizontal in a real-world scenario, such as extending from east to west. This allows multiple workers to sort tobacco leaves side-by-side in the tobacco exchange area 100, improving the initial processing efficiency after receiving the tobacco leaves. In this embodiment, the first direction is the direction from the tobacco exchange area 100 towards the grading area 200.

[0036] Among them, the grading area 200 is the tobacco leaf processing area, located after the tobacco delivery area 100. It allows staff to judge and classify the grade of tobacco leaves, such as color, leaf integrity, and maturity.

[0037] Specifically, the grading area 200 is equipped with a second grading table 400, which is connected to the first grading table 300. This means the edges of the second grading table 400 and the first grading table 300 are directly connected or very close. After being sorted at the first grading table 300, tobacco leaves can be directly pushed to the second grading table 400 without the need for baskets, carts, or other transport tools, achieving seamless transfer between tobacco delivery and grading. Here, the second grading table 400 extends horizontally perpendicular to the first direction. It can be understood that if the first direction is horizontal, this direction is vertical, such as extending from south to north. Therefore, in practical applications, the first grading table 300 and the second grading table 400 can form a "T-shaped" tabletop layout, allowing delivery personnel to sort tobacco leaves on the horizontal first grading table 300, while grading personnel determine the grade on the vertical second grading table 400. The operating spaces of the two groups do not overlap or interfere with each other, while shortening the tobacco leaf transfer distance, avoiding frequent personnel movement, and improving work efficiency per unit space.

[0038] Both the first grading table 300 and the second grading table 400 have a fence-like structure 1. When tobacco leaves are sorted on the first grading table 300 in the tobacco exchange area 100 or graded on the second grading table 400 in the grading area 200, non-tobacco substances such as soil, sand, and weeds adhering to the surface of the tobacco leaves, as well as leaf vein fragments and leaf edge fragments generated during harvesting and transportation, will naturally fall off through the gaps in the fence under the action of gravity. Therefore, there is no need for staff to manually clean the tabletops or pick out small impurities from each tobacco leaf, allowing grading operations and impurity separation to proceed simultaneously. This avoids interruptions in the grading process, improves the purity of the tobacco leaves, and reduces the workload of personnel.

[0039] Specifically, the tabletops of the first grading table 300 and the second grading table 400 can be composed of several parallel or intersecting rods 11, with gaps formed between adjacent rods 11. The size of these gaps can be designed according to the dimensions of common tobacco leaf debris and non-tobacco substances to ensure that impurities can pass through while preventing whole tobacco leaves from falling. Here, the rods 11 can be metal rods or plastic rods, etc.

[0040] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, several rods 11 can rotate around their own axes.

[0041] In this embodiment, the design of several rods 11 that can rotate around their own axes can optimize the operation of the flue-cured tobacco grading system from multiple dimensions: On the one hand, when the tobacco leaves move on the table, they will drive the rods 11 to rotate, breaking the adhesion of impurities such as dirt and small debris on the surface of the tobacco leaves through dynamic friction. At the same time, the rotating rods 11 can prevent impurities from getting stuck in the fixed gaps, greatly improving the efficiency of impurities passing through the gaps in the fence and reducing the residual impurity rate on the surface of the tobacco leaves; on the other hand, the rotation of the rods 11 transforms the sliding friction between the tobacco leaves and the table into rolling friction, which not only reduces the operating resistance of the staff pushing the tobacco leaves and alleviates the fatigue of the staff, but also prevents the fixed rods 11 from snagging on the edges of the tobacco leaves, effectively protecting the integrity of the tobacco leaves and ensuring the accuracy of subsequent grading judgments. Ultimately, while enhancing the impurity separation effect, it also takes into account the smoothness of operation and the quality assurance of the tobacco leaves.

[0042] Among them, the rod 11 can be made of a material with a smooth surface, moderate hardness and wear resistance, such as 304 stainless steel rod or high-strength engineering plastic rod. On the one hand, this will prevent the rod 11 from rusting and contaminating the tobacco leaves, and on the other hand, it will reduce the frictional resistance during rotation, while ensuring that it will not deform easily during long-term use.

[0043] Specifically, in practical applications, to enable the rotation of rod 11, a shaft end with a diameter slightly smaller than the rod 11 body is machined at both ends of each rod 11. Simultaneously, miniature deep groove ball bearings or sliding bushings are installed on the side frames of the grading table at the corresponding positions of each shaft end, embedding the shaft end of the rod 11 into the inner ring of the bearing or bushing. Thus, the bearings or bushings transform the rigid contact between the rod 11 and the table frame into rolling contact, significantly reducing the frictional resistance during rotation and ensuring easy rotation under external forces, such as the movement of tobacco leaves. Here, the table frame of the grading table refers to the frame-like support structure that supports the entire grid-like tabletop, i.e., all rotatable rods 11, bears the weight of the tobacco leaves, and provides the mounting base for the rotation of the rods 11. It is the skeleton of the grading table, connecting the tabletop to the ground or operating platform foundation, and providing fixed points for various functional components such as bearings and bushings, ensuring the overall structural stability of the grading table and its required load-bearing capacity.

[0044] In the above embodiments, see Figure 2 As shown, when several rods 11 of the first grading table 300 can rotate along their own axis, they form a conveying driving force in the first direction, so as to drive the tobacco leaves placed on the table of the first grading table 300 to move along the feed end of the first grading table 300 towards the direction close to the second grading table 400.

[0045] Here, several rods 11 of the first grading table 300 rotate only when pushing the tobacco leaves. The staff only needs to apply a starting force to push the tobacco leaves toward the rods 11. The rotating rods 11 will convert sliding friction into rolling friction and at the same time form a continuous conveying driving force along the first direction. This means that the subsequent movement of tobacco leaves does not need to rely on continuous manual force. It is equivalent to the rods 11 assisting in conveying tobacco leaves, which greatly reduces the physical exertion of the staff, alleviates work fatigue, and is suitable for long-term, large-volume tobacco leaf sorting scenarios.

[0046] In the above embodiments, see Figure 2 As shown, when several rods 11 of the second grading table 400 can rotate along their own axis, they form a conveying driving force in a horizontal direction perpendicular to the first direction, so as to drive the tobacco leaves that enter the second grading table 400 from the discharge end of the first grading table 300 to move towards both ends of the second grading table 400 along the extension direction of the second grading table 400.

[0047] Here, because the second grading table 400 extends horizontally perpendicular to the first direction, multiple workers can be arranged along its extension path to carry out grading operations in parallel. When the several rods 11 of the second grading table 400 rotate along their own axis, they generate a conveying driving force that moves along the extension direction towards both ends of the second grading table 400. This driving force can divert the tobacco leaves transferred from the discharge end of the first grading table 300 to the second grading table 400 towards the multi-station directions at both ends of the second grading table 400. This effectively avoids operational congestion caused by the accumulation of tobacco leaves in the middle of the second grading table 400, and ensures that workers at each grading station can quickly and evenly obtain the tobacco leaves to be graded. Ultimately, this significantly improves the parallel operation efficiency of the grading area 200, making it suitable for centralized grading scenarios involving large quantities of tobacco leaves. It should be noted that the several rods 11 of the second grading table 400 only rotate when pushing the tobacco leaves.

[0048] In the above embodiments, see Figure 1 As shown, the spacing between several rods 11 of the first grading table 300 is greater than the spacing between several rods 11 of the second grading table 400.

[0049] Here, the spacing between several rods 11 on the first grading table 300 is greater than that between several rods 11 on the second grading table 400, allowing for precise adaptation to the different operational needs of the tobacco exchange area 100 and the grading area 200: In the tobacco exchange area 100, the larger spacing between the rods 11 on the first grading table 300 can efficiently pass through larger coarse particles such as large clumps of soil and intact weeds attached to the surface of the tobacco leaves, quickly completing the initial coarse impurity removal, while avoiding the obstruction of tobacco leaf sorting operations by too small gaps, ensuring the rapid reception and initial processing efficiency of large batches of tobacco leaves; In the grading area 200, the smaller spacing between the rods 11 on the second grading table 400 can accurately separate small impurities such as fine leaf vein fragments and powdery soil that were not removed in the tobacco exchange area 100, further improving the purity of the tobacco leaves to avoid interfering with the grade judgment, and can also form a denser support surface to prevent intact tobacco leaves from getting stuck in the gaps during the grading operation and causing damage, thus maximizing the integrity of the tobacco leaves. In other words, the differentiated gaps between the first grading table 300 and the second grading table 400 enable the tobacco exchange zone 100 and the grading zone 200 to respectively achieve efficient coarse and fine impurity removal and tobacco leaf protection, thereby synergistically optimizing the overall impurity removal effect, grading accuracy and tobacco leaf loss control, and improving the overall operational performance of the flue-cured tobacco grading system.

[0050] It should be noted that in this embodiment, the first grading table 300 and the second grading table 400 are similar in overall structure, and the differences between them are only reflected in three aspects: first, the spacing between the several rods 11 on the table is different; second, the size and specifications of the grading table itself are different; and third, the placement and extension direction in the flue-cured tobacco grading system is different.

[0051] The basic structural form shared by the first tier table 300 and the second tier table 400 can be referred to in the schematic diagram. Figure 2 To understand.

[0052] Specifically, for the first grading table 300, its first extending direction is the length direction of the grading table itself; for the second grading table 400, its horizontal extending direction, which is perpendicular to the first direction, is the length direction of the grading table itself.

[0053] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 and Figure 3 As shown, a collection plate 2 is provided under the tabletop of the first grading table 300 and the second grading table 400. The collection plate 2 is used to collect tobacco leaf debris and non-tobacco substances falling through the gaps in the fence structure 1.

[0054] In this embodiment, the collection plate 2 can collect tobacco leaf debris and non-tobacco substances that fall naturally from the gaps in the fence-type tabletop, preventing impurities from directly scattering onto the ground and causing a dirty working environment. This reduces the labor costs and time required for subsequent ground cleaning. It also prevents scattered impurities from re-adhering to the tobacco leaf surface due to personnel movement and airflow, ensuring the cleanliness of the grading area 200 and the purity of the tobacco leaves. Furthermore, centralized collection of impurities facilitates the unified processing of debris and non-tobacco substances, avoiding hygiene hazards and resource waste caused by the random accumulation of impurities. This further optimizes the standardization and environmental friendliness of the entire flue-cured tobacco grading system. Combined with the impurity separation function of the fence-type tabletop, it allows for efficient integration of grading operations, impurity separation, and centralized collection, significantly improving overall operational efficiency and on-site management.

[0055] The collection plate 2 is laid out in a manner that perfectly matches the surface of the grading table above. In practical applications, the collection plate 2 under the surface of the first grading table 300 extends along the first direction, covering the entire projection area of ​​the first grading table 300. The collection plate 2 under the surface of the second grading table 400 extends along a horizontal direction perpendicular to the first direction, covering the entire projection area of ​​the second grading table 400, ensuring that no impurities falling from the gaps in the fence are missed and do not scatter to the ground due to insufficient collection area.

[0056] Specifically, in some examples, the collection plate 2 is a flat plate structure; in other examples, the collection plate 2 is a sloped surface to one side or a structure with a guide channel. It should be noted that when the collection plate 2 is a sloped surface to one side or a structure with a guide channel, the collection plate 2 can automatically collect the impurities in a designated direction, such as collecting them into the edge of the collection box or garbage bag, reducing the frequency of manual cleaning of the collection plate 2.

[0057] Furthermore, to prevent tobacco debris and non-tobacco substances collected on the collection plate 2 from slipping off the edge of the collection plate 2 to the ground during collection and temporary storage due to tilting of the collection plate 2, collisions with the grading table by personnel, or disturbances from ambient airflow, thus causing secondary scattering of impurities and increasing cleaning costs, an upward-extending baffle is provided along the edge of the collection plate 2. This baffle forms a boundary protection structure surrounding the area receiving the collection plate 2, effectively intercepting impurities at the edge of the collection plate 2. This ensures that all impurities falling through the gaps in the baffle are always confined inside the collection plate 2, further guaranteeing the centralized collection effect of impurities, maintaining the cleanliness of the working environment, and maximizing the integrity and reliability of impurity collection.

[0058] In the above embodiments, see Figure 2 As shown, the edge of the collecting plate 2 extends beyond the horizontal projection range of the fence structure 1.

[0059] Here, extending the edge of the collection plate 2 beyond the horizontal projection range of the fence structure 1 creates an extended receiving area that exceeds the desktop projection. This comprehensively captures impurities that shift position during tobacco leaf handling and grading operations as they fall through the gaps in the fence, completely preventing impurities from scattering onto the ground due to their falling trajectory exceeding the desktop projection range. This further enhances the cleanliness of the working environment and reduces secondary cleaning costs caused by impurities scattered on the ground. Simultaneously, without affecting the original impurity separation efficiency and tobacco leaf processing flow, it maximizes the impurity receiving coverage of the collection plate 2, ensuring seamless connection and efficient collaboration across the entire process of grading operations, impurity separation, and centralized collection. This provides more reliable support for the standardized on-site management of the flue-cured tobacco grading system.

[0060] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 3 As shown, the cross-section of the collecting plate 2 gradually narrows from the edge to the center, so as to form a receiving surface 21 in the edge area of ​​the collecting plate 2 for receiving tobacco leaf debris and non-smoking materials falling through the gap of the fence structure 1. A converging opening 22 is formed in the center to cooperate with the receiving surface 21 to guide the tobacco leaf debris and non-smoking materials to slide down from the edge to the converging opening 22 in the center.

[0061] In this embodiment, by setting the cross-section of the collection plate 2 to be tapered from the edge to the center, on the one hand, the receiving surface 21 formed by the edge area can fully cover the projection range of the fence-like tabletop and the surrounding area where impurities may fall, ensuring that tobacco fragments and non-tobacco substances falling from the gaps in the tabletop can be stably received, avoiding impurities from scattering on the ground due to deviation in the falling trajectory; on the other hand, with the help of the converging port 22 formed in the center, the impurities on the edge receiving surface 21 can be automatically concentrated in the center and slide off from the converging port 22 through the guiding effect of the tapered structure, eliminating the need for frequent manual cleaning of the collection plate 2. This reduces the cost of manual intervention, improves the efficiency of impurity treatment, and avoids the risk of secondary pollution caused by the accumulation of impurities on the collection plate 2. It further strengthens the synergy of the entire process of grading operation, impurity separation and centralized collection, providing a more reliable guarantee for the on-site clean management and efficient operation of the flue-cured tobacco grading system.

[0062] The cross-section of the collecting plate 2 refers to the cut surface obtained by cutting the collecting plate 2 along the vertical direction.

[0063] The phrase "the cross-section of the collecting plate 2 gradually narrows from the edge to the center" means that the cross-section of the collecting plate 2 is not flat, but gradually narrows and lowers from the left and right edges towards the center, forming a shape similar to the side of a funnel, the slope of a roof, or the bottom of a washbasin in daily life. For example, if the edge height of the collecting plate 2 is 5cm, the height gradually decreases as it moves towards the center, and at the center the height may only be 1cm or it may be open directly, forming a sloping trend with high edges and low center.

[0064] Specifically, in this embodiment, the center of the collecting plate 2 has a direct opening, forming a converging port 22. In practical applications, when tobacco leaves are conveyed and screened on the fence structure 1, unqualified tobacco leaf debris and non-tobacco materials, due to their small size, fall naturally through the gaps in the fence. The falling tobacco leaf debris or non-tobacco materials first fall onto the edge receiving surface 21 of the collecting plate 2. Since the receiving surface 21 is an inclined slope with higher edges and lower center, the tobacco leaf debris or non-tobacco materials slide along the receiving surface 21 towards the center of the collecting plate 2 under the action of gravity. All the tobacco leaf debris or non-tobacco materials that slide from both sides eventually converge at the converging port 22 in the center, and then fall into the collection device below, such as a pipe or box, through the converging port 22 to complete centralized collection.

[0065] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 3 As shown, a collection box 3 is detachably installed at the bottom of the collection plate 2 corresponding to the position of the converging port 22. The top opening of the collection box 3 is sealed and connected to the converging port 22 to receive tobacco leaf debris and non-tobacco substances that slide down from the converging port 22.

[0066] In this embodiment, a collection box 3 with a top opening that is sealed to the collection port 22 is detachably installed at the bottom of the collection plate 2 at the position corresponding to the collection port 22. On the one hand, the sealed connection between the collection box 3 and the collection port 22 can completely prevent leakage and scattering of tobacco leaf debris and non-tobacco substances during the process of sliding down from the collection port 22, ensuring that impurities are in a closed collection path throughout the process, further ensuring the cleanliness of the working environment and preventing secondary contamination of tobacco leaves by impurities. On the other hand, the detachable design allows the collection box 3 to be easily removed for emptying or replacement after it is full of impurities, without interrupting the normal operation of the grading system, greatly improving the flexibility and efficiency of impurity handling, and avoiding grading stagnation caused by manual cleaning of the collection plate 2 or the collection port 22. At the same time, the sealed connection combined with the detachable collection box 3 can also achieve centralized and standardized collection of impurities, which is convenient for the unified treatment of debris and other substances in the future, reducing resource waste and hygiene hazards. Ultimately, on the basis of strengthening the sealing of impurity collection and ensuring the continuity of operation, the efficiency of impurity management and the level of on-site standardization of the flue-cured tobacco grading system are further optimized.

[0067] Specifically, in the connection structure between the collecting plate 2 and the collecting box 3: on the lower surface of the collecting plate 2, an annular sealing ring mounting groove is formed around the outer periphery of the converging port 22. The groove size is adapted to the silicone sealing ring to be embedded, ensuring that the sealing ring can be stably embedded and will not fall off; the silicone sealing ring is embedded into the mounting groove accordingly to reserve the structural foundation for subsequent sealing and bonding; at the same time, multiple L-shaped buckles or press-type buckles are evenly distributed around the outer periphery of the sealing ring mounting groove. The number of buckles is adapted to the diameter of the converging port 22, usually three or four, to ensure balanced force, serving as mechanical connection components between the collecting plate 2 and the collecting box 3. At the edge of the top opening of the collecting box 3, an outwardly extending flange is integrally formed or fixedly connected; and on the upper surface of the outwardly extending flange, corresponding to the position of the L-shaped buckle or press-type buckle on the side of the collecting plate 2, a slot matching the shape and size of the buckle is formed for engaging with the buckle. During assembly, align the outward-facing flange of the top opening of the collection box 3 with the lower surface of the collection plate 2, so that the slot of the outward-facing flange is aligned with the buckle of the collection plate 2. By rotating the collection box 3 (for L-shaped buckles) or pressing the buckle (for push-button buckles), the buckle can be engaged in the slot. At this time, the upper surface of the outward-facing flange of the collection box 3 is tightly fitted with the silicone sealing ring on the lower surface of the collection plate 2, realizing a detachable and sealed connection between the collection plate 2 and the collection box 3.

[0068] In the above embodiments, see Figure 3 As shown, the side wall of the collection box 3 is provided with a transparent observation window 31 for real-time observation of the accumulation of tobacco leaf debris and non-tobacco substances in the collection box 3.

[0069] Here, by setting a transparent observation window 31 on the side wall of the collection box 3, the staff can observe the accumulation of tobacco leaf debris and non-tobacco substances in the box in real time and intuitively without disassembling the collection box 3. On the one hand, it can accurately grasp the overflow threshold of the collection box 3, avoiding the pollution of the working environment and secondary cleaning costs caused by the overflow of impurities due to the inability to detect the accumulation in time. On the other hand, it can reasonably plan the timing of emptying or replacing the collection box 3, preventing the operation redundancy caused by premature cleaning and avoiding the interruption of the normal operation of the grading system due to overfilling. It effectively ensures the continuity and efficiency of the impurity collection link, and further optimizes the on-site management efficiency and operation smoothness of the flue-cured tobacco grading system.

[0070] Among them, the observation window 31 can be made of materials with good light transmission and wear resistance, such as tempered glass or high-transparency plastic. It must ensure that staff can see the inside clearly, and also adapt to the slight collisions and dust adhesion that may occur in the tobacco processing environment, so as to ensure that the observation effect is not affected after long-term use.

[0071] Specifically, the observation window 31 is installed on the side wall of the collection box 3, which allows for a clear determination from the side whether waste is piled up from the bottom to the opening of the box, avoiding the problems of obstruction from the top view and inability to observe from the bottom view.

[0072] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0073] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A flue-cured tobacco grading system, characterized in that, include: The tobacco exchange area and grading area are set up sequentially along the tobacco processing flow; A first grading table is disposed within the smoking exchange area and extends along a first direction; The second grading table is disposed within the grading area and is connected to the first grading table and extends in a horizontal direction perpendicular to the first direction; The tabletops of both the first and second grading tables have a fence-like structure, which forms gaps for tobacco leaf debris and non-tobacco substances to pass through.

2. The flue-cured tobacco grading system of claim 1, wherein, The fence-like structure consists of several spaced-apart rods, and each of the rods can rotate around its own axis.

3. The flue-cured tobacco grading system of claim 2, wherein, When the rods of the first grading table are rotatable along their own axis, they generate a conveying driving force along the first direction, thereby driving the tobacco leaves placed on the tabletop of the first grading table to move along the feed end of the first grading table toward the direction of the second grading table.

4. The flue-cured tobacco grading system according to claim 2, characterized in that, When the rods of the second grading table are rotatable along their own axis, they generate a conveying driving force in a horizontal direction perpendicular to the first direction, so as to drive the tobacco leaves that enter the second grading table from the discharge end of the first grading table to move towards both ends of the second grading table along the extension direction of the second grading table.

5. The flue-cured tobacco grading system according to claim 2, characterized in that, The spacing between the plurality of rods of the first grading table is greater than the spacing between the plurality of rods of the second grading table.

6. The flue-cured tobacco grading system according to claim 1, characterized in that, Both the first and second grading tables have a collection plate underneath their tabletops. The collection plate is used to collect tobacco leaf debris and non-tobacco substances that fall through the gaps in the fence structure.

7. The flue-cured tobacco grading system according to claim 6, characterized in that, The edge of the collecting plate extends beyond the horizontal projection range of the fence structure.

8. The flue-cured tobacco grading system of claim 6, wherein, The cross-section of the collecting plate gradually narrows from the edge to the center, forming a receiving surface in the edge area of ​​the collecting plate for receiving tobacco debris and non-smoking substances falling through the gaps in the fence structure. A converging opening is formed in the center to cooperate with the receiving surface to guide the tobacco debris and non-smoking substances to slide down from the edge to the converging opening in the center.

9. The flue-cured tobacco grading system of claim 8, wherein, A collection box is detachably installed at the bottom of the collection plate corresponding to the position of the converging port. The top opening of the collection box is sealed and connected to the converging port to receive tobacco leaf debris and non-tobacco substances that slide down from the converging port.

10. The flue-cured tobacco grading system according to claim 9, characterized in that, The side wall of the collection box is equipped with a transparent observation window for real-time observation of the accumulation of tobacco debris and non-tobacco substances inside the collection box.

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