A redrying tobacco leaf shearing production line

Abstract

The application relates to the technical field of tobacco processing equipment, and discloses a redried tobacco shearing production line for shearing tobacco on a main conveying belt, which comprises a first conveying belt, the first conveying belt is used for being installed on the main conveying belt, and the main conveying belt is divided into an upstream conveying belt and a downstream conveying belt; a feeding port of the first conveying belt is used for being connected with a discharging port of the upstream conveying belt, the first conveying belt is provided with a first discharging port and a second discharging port, and the first discharging port is connected with the downstream conveying belt; a second conveying belt, the second discharging port is communicated with a feeding port of the second conveying belt; a third conveying belt, a feeding port of the third conveying belt is connected with a discharging port of the second conveying belt; a shearing mechanism, the shearing mechanism is fixedly installed on the third conveying belt; a first screening device, a feeding end of the first screening device is communicated with a discharging end of the third conveying belt; and a discharging end of the first screening device is connected with the downstream conveying belt. Large pieces of tobacco can be flexibly sheared or not sheared to meet production requirements.

Description

Technical Field

[0001] This application relates to the field of tobacco processing equipment technology, and specifically to a re-drying tobacco leaf shearing production line. Background Technology

[0002] During the tobacco re-drying process, the tobacco leaves are conveyed to the drying machine via a conveyor belt. The tobacco leaves on the conveyor belt are of varying sizes. Due to production needs, the large tobacco leaves need to be cut to reduce their size to meet production requirements, i.e., the "reduction of large size and increase of medium size" requirement, in order to facilitate the production of medium and slim cigarettes.

[0003] In existing technologies, the shearing of large tobacco leaves involves directly installing a shearing machine on a conveyor belt to cut the tobacco leaves. All tobacco leaves must pass through the shearing machine before entering the re-drying machine for re-drying.

[0004] Production demands are constantly changing. Producing medium-length cigarettes requires large tobacco leaves, while producing slim cigarettes requires small tobacco leaves. However, existing equipment lacks diversion and bypass mechanisms, which makes it impossible to meet the production requirements of medium-length cigarettes, severely restricting production flexibility and failing to meet production demands. Summary of the Invention

[0005] This application provides a re-drying tobacco leaf shearing production line, which aims to flexibly choose whether to shear or not large tobacco leaves to meet production needs.

[0006] In one embodiment, a re-drying tobacco leaf shearing production line is provided for shearing tobacco leaves on a main conveyor belt, including: A first conveyor belt is installed on the main conveyor belt to divide the main conveyor belt into an upstream conveyor belt and a downstream conveyor belt; the inlet of the first conveyor belt is connected to the outlet of the upstream conveyor belt, and the first conveyor belt has a first outlet and a second outlet, the first outlet being connected to the downstream conveyor belt. The second conveyor belt, the second discharge port is connected to the feed port of the second conveyor belt; A third conveyor belt, the inlet of which is connected to the outlet of the second conveyor belt; A shearing mechanism, which is fixedly installed on the third conveyor belt; A first screening device, wherein the feed end of the first screening device is connected to the discharge end of the third conveyor belt; the discharge end of the first screening device is connected to the downstream conveyor belt.

[0007] The feed inlet of the first conveyor belt is located in the middle of the first conveyor belt, and the two ends are located at the two ends of the first conveyor belt.

[0008] In one embodiment, a second screening device is provided on the downstream conveyor belt, the inlet of the second screening device is connected to the second outlet, and the second screening device has a first outlet and a second outlet; the first outlet is connected to the inlet of the second conveyor belt; and the second outlet is connected to the downstream conveyor belt.

[0009] In one embodiment, the second screening device includes a frame and a plurality of first screening rollers; the frame has two spaced-apart support plates, the plurality of first screening rollers are laid out in a horizontal direction at intervals, each of the first screening rollers is rotatably connected to the support plate, a first drive motor is fixedly mounted on the frame, the first drive motor is drivenly connected to the first screening rollers, and two adjacent first screening rollers are connected by belt drive.

[0010] Specifically, the outlet in the conveying direction of the first screening roller is the first outlet, and the gap between two adjacent first screening rollers is the second outlet.

[0011] In one embodiment, the first screening roller includes a connecting rod and a screening ring; multiple rods are fixedly connected around the screening ring, and the number of screening rings is multiple; the multiple screening rings are sleeved and fixed on the connecting rod, and the projections of each rod on each screening ring on the axial direction of the connecting rod are completely overlapping.

[0012] Specifically, a second screening roller is spaced apart below the first screening roller, and multiple steel wire bundles are evenly distributed on the second screening roller. These steel wire bundles are fixedly connected to the second screening roller. There are multiple second screening rollers, arranged sequentially and at intervals along a horizontal direction. The distance between two adjacent second screening rollers is smaller than the distance between two adjacent first screening rollers.

[0013] In one embodiment, the shearing mechanism is installed at the discharge end of the third conveyor belt. The shearing mechanism includes: a housing with a shearing channel, a first shearing roller, a second shearing roller, a third shearing roller, a fixed blade, and a second drive motor. The first shearing roller, the second shearing roller, and the third shearing roller are all rotatably connected within the shearing channel. The first shearing roller and the second shearing roller abut against each other to form a first shearing area. The first shearing roller is drively connected to the output end of the second drive motor. The third shearing roller and the fixed blade are both located below the second shearing roller. The fixed blade is fixedly connected within the shearing channel. The third shearing roller and the fixed blade form a second shearing area for shearing tobacco leaves.

[0014] In one embodiment, the first shearing roller, the second shearing roller, and the third shearing roller each include a rotating rod, a connecting block, and an adjusting block; there are multiple connecting blocks, and each connecting block is fixedly connected to a cutter; the connecting block is movably sleeved on the rotating rod, and the cutter on the first shearing roller abuts against the connecting block of the second shearing roller; the adjusting block is slidably sleeved on the rotating rod, and the adjusting block is used to be distributed between two adjacent connecting blocks.

[0015] Specifically, there are multiple adjusting blocks, each with a hole through which the rotating rod passes. Each adjusting block has a different size, meaning the distance between them along the extension direction of the hole is different. The adjusting block of the corresponding size is selected and placed in the middle to adjust the distance between two adjacent connecting blocks as needed.

[0016] The connecting block can slide along the extension direction of the rotating rod. The rotating rod has a limiting strip that extends along the extension direction of the rotating rod. The connecting block has a through hole through which the rotating rod passes, and the inner wall of the through hole has a groove for the limiting strip to engage. The rotating rod is threaded with two spaced sleeves, and the connecting block is located between the two sleeves, allowing the connecting block to abut against the sleeves.

[0017] In one embodiment, two stretching rollers are rotatably arranged within the shearing channel; the two stretching rollers are spaced apart; the two stretching rollers are located between the discharge end of the third conveyor belt and the first shearing area; the interior of the two stretching rollers has a cavity; multiple stretching tubes are fixedly connected to the stretching rollers, and each stretching tube communicates with the cavity; the cavity is connected to an external compressed air source; and the stretching rollers are drive-connected to the second drive motor.

[0018] In one embodiment, the lower part of the first screening device has a smoke outlet, and a collection pipe is located directly below the smoke outlet.

[0019] In one embodiment, the third conveyor belt is equipped with a leveling mechanism for spreading tobacco leaves.

[0020] In one embodiment, the leveling mechanism includes: a frame, a third drive motor, a rack, a limiting block, a fixing rod, and a scraper; the frame is fixedly connected to the third conveyor belt; the third drive motor is fixedly connected to the frame, and the output end of the third drive motor meshes with the rack for transmission; the rack has a limiting groove for the limiting block to slide and engage, and the limiting block is fixedly connected to the frame; one end of the fixing rod is fixedly connected to the rack, and the other end is fixedly connected to the scraper; the scraper is located above the conveying surface of the third conveyor belt.

[0021] The beneficial effects of this application are: When production requires small to medium-sized tobacco leaves, the tobacco leaves conveyed by the upstream conveyor belt enter the first conveyor belt. The conveying direction of the first conveyor belt is towards the second discharge port, that is, the second discharge port discharges the tobacco leaves. After passing through the second discharge port, the tobacco leaves enter the second conveyor belt, the third conveyor belt, the shearing mechanism, and the first screening device. Finally, the sheared tobacco leaves enter the downstream conveyor belt, thus realizing the shearing of the tobacco leaves.

[0022] When production requires large quantities of tobacco leaves, the tobacco leaves conveyed by the upstream conveyor belt enter the first conveyor belt, which is positioned so that the leaves exit directly through the first discharge port. This allows the tobacco leaves to flow directly into the downstream conveyor belt without needing to be sheared by a shearing mechanism, thus meeting production demands.

[0023] By controlling the conveying direction of the first conveyor belt, production needs can be flexibly met. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view schematic diagram of a re-drying tobacco leaf shearing production line according to an embodiment of this application; Figure 2 yes Figure 1 Enlarged view of point A in the image; Figure 3 This is a top view schematic diagram of a re-drying tobacco leaf shearing production line according to an embodiment of this application; Figure 4 This is a schematic diagram of the main structure of the third conveyor belt according to an embodiment of this application; Figure 5 This is a schematic diagram of a shearing mechanism according to an embodiment of this application; Figure 6 This is a top view schematic diagram of the first and second shearing rollers according to an embodiment of this application; Figure 7 This is a top view schematic diagram of the third shearing roller structure according to an embodiment of this application; Figure 8 This is a schematic diagram of the stretching roller structure according to an embodiment of this application; Figure 9 This is a top view of a flattening mechanism according to an embodiment of this application; Figure 10 This is a schematic diagram of the main structure of the first screening device according to an embodiment of this application; Labels for each item in the figure: 1. Main conveyor belt; 11. Upstream conveyor belt; 12. Downstream conveyor belt; 2. First conveyor belt; 21. First discharge port; 22. Second discharge port; 3. Second conveyor belt; 4. Third conveyor belt; 5. Shearing mechanism; 51. Housing; 52. First shearing roller; 521. Rotating rod; 522. Connecting block; 523. Adjusting block; 524. Cutter; 525. Sleeve; 53. Second shearing roller; 54. Third shearing roller; 55. Fixed blade; 56. Second drive motor; 57. 58. Spreading roller; 59. Spreading tube; 6. Joint; 70. First screening device; 61. Tobacco dust outlet; 62. Collection pipe; 71. Second screening device; 72. Frame; 73. First screening roller; 74. Connecting rod; 75. Screening ring; 76. Rod body; 77. Support plate; 78. First drive motor; 79. Second screening roller; 80. Leveling mechanism; 81. Frame body; 82. Third drive motor; 83. Rack; 84. Limiting block; 85. Fixing rod; 86. Scraper. Detailed Implementation

[0026] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application. Similarly, the following examples are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this invention, 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," "axial," "radial," and "circumferential" 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 invention and simplifying the description, and are not intended to 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 invention.

[0028] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this invention, unless otherwise explicitly 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 part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] This application proposes improvements and innovations, and presents the following embodiments.

[0033] In some implementations, please refer to Figures 1 to 10 A re-drying tobacco leaf shearing production line is provided for shearing tobacco leaves on the main conveyor belt 1, comprising: The first conveyor belt 2 is installed on the main conveyor belt 1 to divide the main conveyor belt 1 into an upstream conveyor belt 11 and a downstream conveyor belt 12. The inlet of the first conveyor belt 2 is connected to the outlet of the upstream conveyor belt 11. The first conveyor belt 2 has a first outlet 21 and a second outlet 22. The first outlet 21 is connected to the downstream conveyor belt 12. The second conveyor belt 3 has a second discharge port 22 connected to the feed port of the second conveyor belt 3; The third conveyor belt 4 has its inlet connected to the outlet of the second conveyor belt 3. Shearing mechanism 5 is fixedly installed on the third conveyor belt 4; The first screening device 6 has its feed end connected to the discharge end of the third conveyor belt 4; the discharge end of the first screening device 6 is connected to the downstream conveyor belt 12.

[0034] The feed inlet of the first conveyor belt 2 is located in the middle of the first conveyor belt 2, and the two ends are located at the two ends of the first conveyor belt 2 respectively.

[0035] When production requires small to medium-sized tobacco leaves, the tobacco leaves conveyed by the upstream conveyor belt 11 enter the first conveyor belt 2. The conveying direction of the first conveyor belt 2 is towards the second discharge port 22, that is, the second discharge port 22 discharges the tobacco leaves. After passing through the second discharge port 22, the tobacco leaves enter the second conveyor belt 3, the third conveyor belt 4, the shearing mechanism 5, and the first screening device 6. Finally, the sheared tobacco leaves enter the downstream conveyor belt 12, thus realizing the shearing of the tobacco leaves.

[0036] When production requires large quantities of tobacco leaves, the tobacco leaves conveyed by the upstream conveyor belt 11 enter the first conveyor belt 2. The conveying direction of the first conveyor belt 2 is towards the first discharge port 21, meaning the tobacco leaves exit through the first discharge port 21 and directly enter the downstream conveyor belt 12 without needing to be sheared by the shearing mechanism 5. This meets production requirements.

[0037] By controlling the conveying direction of the first conveyor belt 2, production needs can be met flexibly.

[0038] In one embodiment, a second screening device 7 is installed on the downstream conveyor belt 12. The inlet of the second screening device 7 is connected to the second outlet 22. The second screening device 7 has a first outlet and a second outlet. The first outlet is connected to the inlet of the second conveyor belt 3, and the second outlet is connected to the downstream conveyor belt 12. The second screening device 7 can screen out large and small tobacco leaves from the main conveyor belt 1. Large leaves enter the second conveyor belt 3 from the first outlet, while small and medium-sized tobacco leaves enter the downstream conveyor belt 12 from the second outlet. They are not sheared, which reduces the workload of the shearing mechanism 5 and prevents small tobacco leaves from being shredded, thus affecting the subsequent re-drying requirements.

[0039] In one embodiment, the second screening device 7 includes a frame 71 and multiple first screening rollers 72. The frame 71 has two spaced-apart support plates 73. The multiple first screening rollers 72 are laid out horizontally at intervals, and each first screening roller 72 is rotatably connected to the support plate 73. A first drive motor 74 is fixedly mounted on the frame 71, and the first drive motor 74 is driven by the first screening rollers 72. Two adjacent first screening rollers 72 are connected by belt drive. The rotation of the first screening rollers 72 causes small and medium-sized tobacco leaves to fall through the gap between two adjacent first screening rollers 72 into the downstream conveyor belt 12, while large tobacco leaves are conveyed to the second conveyor belt 3 through the conveying direction formed by the synchronous rotation of the multiple first screening rollers 72. The second screening device 7 has a simple structure and reasonable design.

[0040] Specifically, the outlet in the conveying direction of the first screening roller 72 is the first outlet, and the gap between two adjacent first screening rollers 72 is the second outlet.

[0041] In one embodiment, the first screening roller 72 includes a connecting rod 721 and a screening ring 722; multiple rods 723 are fixedly connected around the screening ring 722, and the number of screening rings 722 is multiple; the multiple screening rings 722 are sleeved and fixed on the connecting rod 721, and the projections of each rod 723 on each screening ring 722 on the axial direction of the connecting rod 721 completely overlap. The first screening roller 72 has a simple structure and a reasonable design.

[0042] Specifically, a second screening roller 75 is spaced apart below the first screening roller 72. Multiple steel wire bundles are evenly distributed on the second screening roller 75 and are fixedly connected to it. There are multiple second screening rollers 75, arranged sequentially and spaced apart in a horizontal direction. The second screening rollers 75 are connected by belt drives, as are the first screening roller 72 and the second screening roller 75. The distance between two adjacent second screening rollers 75 is smaller than the distance between two adjacent first screening rollers 72. The second screening rollers 75 are used to adsorb and separate impurities such as lint and feathers from the tobacco leaves.

[0043] In one embodiment, the shearing mechanism 5 is installed on the discharge end of the third conveyor belt 4. The shearing mechanism 5 includes: a housing 51 with a shearing channel, a first shearing roller 52, a second shearing roller 53, a third shearing roller 54, a fixed blade 55, and a second drive motor 56. The first shearing roller 52, the second shearing roller 53, and the third shearing roller 54 are all rotatably connected within the shearing channel. The first shearing roller 52 and the second shearing roller 53 abut against each other to form the first shearing area. The first shearing roller 52 is connected to the output end of the second drive motor 56. The third shearing roller 54 and the fixed blade 55 are both located below the second shearing roller 53. The fixed blade 55 is fixedly connected within the shearing channel. The third shearing roller 54 and the fixed blade 55 form the second shearing area for shearing tobacco leaves. Large tobacco leaves are sheared by the first shearing roller 52 and the second shearing roller 53, and then sheared again by the third shearing roller 54 in conjunction with the fixed blade 55. This two-stage shearing process first breaks the large tobacco leaves in the first shearing area (large-size tobacco leaf shearing), and then enters the second shearing area for fine shearing. This effectively avoids the clogging problem caused by excessive load in a single shearing operation. Graded shearing can make the size of the tobacco leaves more uniform, reduce the phenomenon of over-crushing or under-cutting, and improve the shearing quality.

[0044] In one embodiment, the first shearing roller 52, the second shearing roller 53, and the third shearing roller 54 each include a rotating rod 521, a connecting block 522, and an adjusting block 523. Multiple connecting blocks 522 are present, and each connecting block 522 is fixedly connected to a cutter 524. The connecting blocks 522 are movably sleeved on the rotating rod 521, and the cutters 524 on the first shearing roller 52 abut against the connecting blocks 522 of the second shearing roller 53. The adjusting blocks 523 are slidably sleeved on the rotating rod 521 and are distributed between two adjacent connecting blocks 522. By adding adjusting blocks 523 between two connecting blocks 522, the distance between two adjacent cutters 524 can be increased, thereby improving the ability to meet the dimensional load requirements of the sheared tobacco sheets.

[0045] Specifically, the cutter 524 of the third shearing roller 54 is rod-shaped, while the cutters 524 of the first shearing roller 52 and the second shearing roller 53 are annular. The rod-shaped cutter 524 of the third shearing roller 54 can grip the tobacco leaves and move them towards the fixed blade 55 when the rotating rod 521 rotates, thus cutting the tobacco leaves more effectively. The annular cutters 524 of the first shearing roller 52 and the second shearing roller 53 are used because the tobacco leaves fed in by the conveyor belt are continuously laid out in a strip shape, and the annular cutter 524 can cut them more effectively.

[0046] Specifically, there are multiple adjusting blocks 523, each with a hole through which the rotating rod 521 passes. Each adjusting block 523 has a different size, meaning the distance between them along the extension direction of the hole is different. The adjusting block 523 of the corresponding size is selected in the middle to adjust the distance between two adjacent connecting blocks 522 as needed. The different sizes of each adjusting block 523 ensure that the cut tobacco sheet size meets production requirements.

[0047] The connecting block 522 can slide along the extension direction of the rotating rod 521. The rotating rod 521 has a limiting strip that extends along the extension direction of the rotating rod 521. The connecting block 522 has a through hole through which the rotating rod 521 passes, and the inner wall of the through hole has a groove for the limiting strip to engage. Two spaced sleeves 525 are threadedly connected to the rotating rod 521, and the connecting block 522 is located between the two sleeves 525, and the connecting block 522 can abut against the sleeves 525. The limiting strip ensures the synchronous rotation of the connecting block 522 and the rotating rod 521.

[0048] In one embodiment, two stretching rollers 57 are rotatably arranged within the shearing channel; the two stretching rollers 57 are spaced apart; the two stretching rollers 57 are located between the discharge end of the third conveyor belt and the first shearing area; the interior of the two stretching rollers 57 has a cavity; multiple stretching tubes 58 are fixedly connected to the stretching rollers 57, and each stretching tube 58 is connected to the cavity; the cavity is connected to an external compressed air source; the stretching rollers are connected to a second drive motor.

[0049] Before the tobacco leaves enter the shearing process, the mechanical action of the spreading roller 57 and the blowing of compressed air can break up and flatten the tangled and overlapping tobacco leaves, making them evenly spread out. Evenly spread tobacco leaves can be processed more consistently by the shearing mechanism 5, thus ensuring the uniformity of the size of the sheared tobacco leaves and improving product quality. The pre-treated tobacco leaves are looser and have better flowability, effectively reducing the probability of clogging in the shearing area.

[0050] Specifically, the cavity of the stretching roller is connected to a compressed air source via connector 59, which is rotatably connected to one end of the stretching roller via a bearing. By rotating connector 59, a fixed compressed air source pipeline can be connected to the continuously rotating stretching roller, so that while the stretching roller is performing its mechanical stretching function at high speed, it can continuously and evenly eject compressed air from its internal cavity through the stretching pipe.

[0051] The rotary joint 59 is a mature standard part that effectively solves the sealing problem at the dynamic and static interfaces, prevents compressed air leakage, and ensures stable air pressure, thereby guaranteeing the continuity and stability of the jet propulsion effect. Without this design, reliable air supply during rotation would be impossible.

[0052] Specifically, there are multiple second drive motors 56, and each of the multiple second drive motors 56 is connected to the first shearing roller 52, the second shearing roller 53, the third shearing roller 54, and the two stretching rollers 57 respectively.

[0053] Each key actuator (three shearing rollers and two stretching rollers 57) is driven by an independent motor, which means that the rotational speed of each roller can be precisely and independently controlled.

[0054] The speed relationship between each roller can be finely adjusted according to process requirements. For example, a certain speed difference can be set between the two stretching rollers 57 to generate stronger tearing and stretching force; the feeding speed and shearing speed of the first shearing zone and the second shearing zone can be precisely matched, as well as the speed transmission between the first-stage shearing and the second-stage shearing, thereby achieving the smoothest material flow and the highest shearing quality.

[0055] This configuration provides ample room for future adjustment and optimization of process parameters, and can adapt to tobacco raw materials with different characteristics (such as different humidity and toughness).

[0056] If a component jams or is overloaded, it will usually only affect the corresponding single motor, making it easy to quickly locate the problem and preventing the entire shearing system from shutting down.

[0057] Specifically, the first shearing roller 52, the second shearing roller 53, the third shearing roller 54, and the two stretching rollers 57 can also be connected to a second drive motor 56 via their respective reducers.

[0058] All moving parts (three shearing rollers and two stretching rollers) are driven by the same motor and connected via mechanical transmission (such as belts, gears) and reducers, ensuring a strict and fixed speed ratio between them. This rigid mechanical connection ensures absolute synchronization of the movement of each roller, avoiding slight asynchrony problems that may be caused by differences in the response characteristics of multiple motors.

[0059] Using a single large motor and multiple reducers is generally cheaper than purchasing multiple independent servo / drive motors, which helps reduce the overall manufacturing cost of the equipment.

[0060] In terms of electrical control, only one main motor needs to be controlled and its speed adjusted. The control system is simpler than the multi-motor solution, reducing the number of electrical components such as frequency converters or servo drives, and there are fewer potential failure points.

[0061] In one embodiment, the lower part of the first screening device 6 has a smoke outlet 61, and a collection pipe 62 is located directly below the smoke outlet 61. Collecting the smoke through the collection pipe 62 can prevent the accumulation of smoke.

[0062] In one embodiment, a leveling mechanism 8 for spreading tobacco leaves is installed on the third conveyor belt 4. The leveling mechanism 8 is used to spread the tobacco leaves evenly, improving the uniformity of the shearing process, reducing the workload of the shearing mechanism 5, and minimizing the possibility of blockage in the shearing mechanism 5.

[0063] In one embodiment, the leveling mechanism 8 includes: a frame 81, a third drive motor 82, a rack 83, a limiting block 84, a fixing rod 85, and a scraper 86. The frame 81 is fixedly connected to the third conveyor belt 4. The third drive motor 82 is fixedly connected to the frame 81, and its output end meshes with the rack 83 for transmission. The rack 83 has a limiting groove for the limiting block 84 to slide and engage, and the limiting block 84 is fixedly connected to the frame 81. One end of the fixing rod 85 is fixedly connected to the rack 83, and the other end is fixedly connected to the scraper 86. The scraper 86 is located above the conveying surface of the third conveyor belt 4. The leveling mechanism 8 has a simple structure and a reasonable design.

[0064] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A re-drying tobacco leaf shearing production line, used for shearing tobacco leaves on a main conveyor belt, characterized in that, include: A first conveyor belt is installed on the main conveyor belt to divide the main conveyor belt into an upstream conveyor belt and a downstream conveyor belt; The feed inlet of the first conveyor belt is used to connect with the discharge outlet of the upstream conveyor belt. The first conveyor belt has a first discharge outlet and a second discharge outlet, and the first discharge outlet is connected to the downstream conveyor belt. The second conveyor belt, the second discharge port is connected to the feed port of the second conveyor belt; A third conveyor belt, the inlet of which is connected to the outlet of the second conveyor belt; A shearing mechanism, which is fixedly installed on the third conveyor belt; A first screening device, wherein the feed end of the first screening device is connected to the discharge end of the third conveyor belt; the discharge end of the first screening device is connected to the downstream conveyor belt.

2. The production line according to claim 1, characterized in that, A second screening device is provided on the downstream conveyor belt. The feed end of the second screening device is connected to the second discharge port. The second screening device has a first outlet and a second outlet. The first outlet is connected to the feed port of the second conveyor belt. The second outlet is connected to the downstream conveyor belt.

3. The production line according to claim 2, characterized in that, The second screening device includes a frame and a plurality of first screening rollers; the frame has two spaced-apart support plates, the plurality of first screening rollers are laid out in a horizontal direction at intervals, each of the first screening rollers is rotatably connected to the support plate, a first drive motor is fixedly installed on the frame, the first drive motor is drivenly connected to the first screening rollers, and two adjacent first screening rollers are connected by belt drive.

4. The production line according to claim 3, characterized in that, The first screening roller includes a connecting rod and a screening ring; multiple rods are fixedly connected around the screening ring, and the number of screening rings is multiple; the multiple screening rings are sleeved and fixed on the connecting rod, and the projections of each rod on each screening ring on the axial direction of the connecting rod are completely coincident.

5. The production line according to claim 1, characterized in that, The shearing mechanism is installed on the discharge end of the third conveyor belt. The shearing mechanism includes: a housing with a shearing channel, a first shearing roller, a second shearing roller, a third shearing roller, a fixed blade, and a second drive motor. The first shearing roller, the second shearing roller, and the third shearing roller are all rotatably connected within the shearing channel. The first shearing roller and the second shearing roller abut against each other to form a first shearing area. The first shearing roller is drive-connected to the output end of the second drive motor. The third shearing roller and the fixed blade are both located below the second shearing roller. The fixed blade is fixedly connected within the shearing channel. The third shearing roller and the fixed blade form a second shearing area for shearing tobacco leaves.

6. The production line according to claim 5, characterized in that, The first shearing roller, the second shearing roller, and the third shearing roller each include a rotating rod, a connecting block, and an adjusting block; there are multiple connecting blocks, and each connecting block is fixedly connected to a cutter; the connecting block is movably sleeved on the rotating rod, and the cutter on the first shearing roller abuts against the connecting block of the second shearing roller; the adjusting block is slidably sleeved on the rotating rod, and the adjusting block is used to be distributed between two adjacent connecting blocks.

7. The production line according to claim 6, characterized in that, Two stretching rollers are also rotatably arranged within the shearing channel; the two stretching rollers are spaced apart; the two stretching rollers are located between the discharge end of the third conveyor belt and the first shearing area; the two stretching rollers have cavities inside; multiple stretching tubes are fixedly connected to the stretching rollers, and each stretching tube communicates with the cavity; the cavity is connected to an external compressed air source; the stretching rollers are drive-connected to the second drive motor.

8. The production line according to claim 1, characterized in that, The lower part of the first screening device has a smoke outlet, and a collection pipe is located directly below the smoke outlet.

9. The production line according to any one of claims 1-8, characterized in that, The third conveyor belt is equipped with a leveling mechanism for spreading tobacco leaves.

10. The production line according to claim 9, characterized in that, The leveling mechanism includes: a frame, a third drive motor, a rack, a limiting block, a fixing rod, and a scraper; the frame is fixedly connected to the third conveyor belt; the third drive motor is fixedly connected to the frame, and the output end of the third drive motor meshes with the rack for transmission; the rack has a limiting groove for the limiting block to slide and engage, and the limiting block is fixedly connected to the frame; one end of the fixing rod is fixedly connected to the rack, and the other end is fixedly connected to the scraper; the scraper is located above the conveying surface of the third conveyor belt.

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