Loose tobacco screening device

Abstract

This application relates to the technical field of tobacco processing equipment, specifically to a loose tobacco shred screening device, including a frame, a first screen, a swing arm, a screening trough, and a second screen. The first screen is fixed to the frame, and the swing arm is rotatably mounted on the first screen and connected to the screening trough. The swing arm swings, driving the screening trough to reciprocate and screen the material, thus moving the material. The bottom wall of the screening trough has screening holes, and the material screened out by the screening trough enters the first screen for further screening. This device has a three-layer screening structure, allowing for multi-stage screening of the material. Different sizes of clumps of tobacco shreds and qualified tobacco shreds are screened out at different levels, solving the problem of poor effectiveness in eliminating clumps of tobacco shreds using traditional methods. The swing arm drives the screening trough and the second screen to reciprocate, which can more effectively break up tangled clumps and improve the purity and quality of the tobacco shreds. Moreover, this device uses mechanical screening, avoiding the problems of moisture loss and fragmentation of tobacco shreds caused by traditional multi-stage air separation, thus better preserving the physical properties of the tobacco shreds.

Description

Technical Field

[0001] This application relates to the field of tobacco processing equipment technology, and more specifically, to a device for loosening and screening tobacco shreds. Background Technology

[0002] In tobacco processing, the primary method for improving tobacco purity is currently through the removal of stems and stalks using flexible air separators. These separators utilize the difference in suspension velocity between tobacco and stems in the airflow. Tobacco has a lower suspension velocity than stems, and they can be separated by adjusting the airflow speed within the separator. However, during tobacco production and processing, the tangling of tobacco and the pressure exerted by the equipment can cause clumping. This is especially true after drying and cooling, when tobacco tends to curl and even twist into clumps, increasing its suspension velocity. This makes it more difficult to remove stems and stalks from the separator, leading to mis-removal. Excessive clumping can even cause blockages in the separator.

[0003] Currently, the treatment of clumped tobacco mostly involves setting rakes at the outlet of the storage tank and using vibration conveyors to generate vibration, but the elimination effect is not ideal. Removing stems and twigs mainly utilizes multi-stage air separation, but multi-stage air separation can lead to excessive moisture loss and large fragmentation. Utility Model Content

[0004] The purpose of this application is to provide a loose tobacco shred screening device that has good screening effect and de-agglomeration effect, and does not cause excessive moisture loss of the material.

[0005] To achieve the above objectives, the present invention provides a loose tobacco shredding screening device, comprising: A rack, which provides a mounting base; The first screen is fixedly mounted on the frame. A swing arm, which is rotatably mounted on the first screen. The screening trough has screening holes on its bottom wall. The material that is screened out by the screening trough enters the first screen for further screening. The screening trough is connected to the swing arm. The swing arm swings to drive the screening trough to move back and forth, so that the screening trough screens the material while driving the material to move on the screening trough. The second screen is fixedly installed in the screening trough. The material screened out by the second screen enters the screening trough for further screening. The gap width of the screen holes on the second screen is greater than the gap width of the screening holes, and the gap width of the screening holes is greater than the gap width of the screen holes on the first screen.

[0006] In an optional implementation, the number of swing arms is at least two.

[0007] In an optional embodiment, a separator is further included, which is vertically fixedly connected to the second screen for pre-dispersing the material.

[0008] In an optional embodiment, the number of the separators is at least two, and the at least two separators are spaced apart.

[0009] In an optional embodiment, the mesh width of the first screen is 1 mm.

[0010] In an optional embodiment, the mesh width of the second screen is 3 mm.

[0011] In an optional embodiment, the gap width of the sieve holes is 2.5 mm.

[0012] In an optional embodiment, the swing arm has two ends, the middle part of the swing arm is rotatably mounted on the first screen, and one end of the swing arm is hinged to the screening trough. The loose tobacco shred screening device also includes a collector, which is hinged to the other end of the swing arm. The swing arm swings to drive the screening trough and the collector to move back and forth, and the material screened out from the first screen falls into the collector.

[0013] In an optional embodiment, a first conveying assembly is also included, disposed at the end of the collector for conveying material discharged from the collector.

[0014] In an optional embodiment, a second conveying assembly is further included, which is disposed at the end of the first screen for conveying material discharged from the first screen.

[0015] This application employs a three-layer screening structure consisting of a second screen, a screening trough, and a first screen, allowing materials to undergo multi-stage screening. Clumps of tobacco of different sizes and qualified tobacco are screened out at different levels: large clumps are initially screened on the second screen, with reciprocating movement helping to loosen them; unscreened material moves to the screening trough, while smaller clumps fall onto the first screen; finally, fine screening occurs on the first screen, solving the problem of poor effectiveness in eliminating clumps of tobacco using traditional methods. A swing arm drives the screening trough and the second screen to reciprocate, causing the material to tumble, collide, and rub, more effectively breaking up tangled clumps and improving the purity and quality of the tobacco. Traditional multi-stage air separation for removing stems and twigs can cause moisture loss and breakage of the tobacco; this device uses mechanical screening to avoid these problems and better preserve the physical properties of the tobacco. Furthermore, this device can operate continuously, meeting the needs of large-scale production, improving efficiency, reducing the accumulation of clumps of tobacco, lowering the risk of air separation box blockage, and improving production stability and reliability.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure from one perspective of one embodiment of the tobacco loosening and screening device provided in this application.

[0019] icon: 100-rack; 210 - First screen; 220 - Second screen; 230 - Screening trough; 240 - Separator; 300-Swing Arm; 400-Collector. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for 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. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] like Figure 1As shown, embodiments of this application provide a loose tobacco sieving device, including a frame 100, a first screen 210, a swing arm 300, a sieving trough 230, and a second screen 220.

[0024] The rack 100 is used to provide a mounting base. For example, the rack 100 is fixedly mounted on the ground or other fixed platform.

[0025] The first screen 210 is fixedly mounted on the frame 100, and the fixing method is, for example, welding, snap-fitting or bolt connection.

[0026] The swing arm 300 is rotatably mounted on the first screen 210; the swing arm 300 is capable of swinging relative to the first screen 210. Exemplarily, the swing arm 300 is hinged to the telescopic end of a telescopic rod, and the telescopic rod's extension and retraction causes the swing arm 300 to swing. In another embodiment, the swing arm 300 is driven by a motor, and the reciprocating rotation of the motor causes the swing arm 300 to swing.

[0027] The bottom wall of the screening tank 230 is provided with screening holes for screening materials, such as shredded tobacco leaves containing tobacco shreds and stems. The screening tank 230 and the first screen 210 are distributed sequentially along the direction of gravity. The material screened out by the screening tank 230 enters the first screen 210 for further screening.

[0028] The screening trough 230 is hinged to the swing arm 300. The swing arm 300 swings to drive the screening trough 230 to move back and forth, so that the screening trough 230 screens the material while driving the material to move on the screening trough 230. The material that is screened off falls onto the first screen 210, and the material that is not screened off gradually moves and is discharged from the screening trough 230.

[0029] The second screen 220 is fixedly installed in the screening trough 230 and has a gap between it and the bottom wall of the screening trough 230. The reciprocating movement of the screening trough 230 drives the second screen 220 to reciprocate.

[0030] The bottom walls of the second screen 220 and the screening trough 230 are distributed sequentially along the direction of gravity. The material screened out by the second screen 220 enters the screening trough 230 for further screening. The gap width of the screen holes on the second screen 220 is greater than the gap width of the screening holes, and the gap width of the screening holes is greater than the gap width of the screen holes on the first screen 210.

[0031] Initially, the material is placed on the second screen 220. The swing arm 300 swings, causing the screening trough 230 and the second screen 220 to move back and forth. This allows the material to move while being screened on the second screen 220. Material that is screened out by the second screen 220 falls onto the screening trough 230, while material that is not screened out gradually moves and is discharged from the second screen 220. The material on the screening trough 230 continues to be screened and moves. Material that is screened out by the screening trough 230 falls onto the first screen 210, while material that is not screened out gradually moves and is discharged from the screening trough 230.

[0032] In this application, a three-layer screening structure is set up, consisting of a second screen 220, a screening trough 230, and a first screen 210. This allows the material to undergo a multi-stage screening process within the device, enabling the separation of clumps of tobacco of different sizes from qualified tobacco at different levels. Larger clumps of tobacco are initially screened on the second screen 220. As the swing arm 300 drives the screening trough 230 and the second screen 220 to move back and forth, the material continuously tumbles and moves on the second screen 220, helping to break up some of the clumps. Material not screened by the second screen 220 enters the screening trough 230, where the reciprocating movement further promotes the dispersion of the material. Smaller clumps of tobacco fall through the screening holes into the first screen 210. Finally, fine screening is performed on the first screen 210 to ensure that the tobacco is fully loosened, effectively solving the problem that traditional methods (such as setting rakes at the outlet of the storage tank or using vibration troughs to generate vibration) are not ideal in eliminating clumps of tobacco.

[0033] The swing arm 300 drives the screening trough 230 and the second screen 220 to move back and forth. This movement causes the material to continuously change position and state on the screen. During the reciprocating movement, the material collides and rubs against each other, and frequently contacts the screen, which can more effectively break up the entanglement and clumping between the tobacco shreds, making the tobacco shreds looser and improving the purity and quality of the tobacco shreds.

[0034] Traditional methods for removing stems and twigs mainly utilize multi-stage air separation, but this can lead to excessive moisture loss in the tobacco and cause it to break up. The tobacco loosening and screening device of this application employs mechanical screening, which does not rely on airflow for separation. This avoids moisture loss and tobacco breakage caused by airflow, better preserving the physical properties of the tobacco and improving its quality.

[0035] The loose tobacco shred screening device provided in this application enables continuous screening operations. Starting from the initial placement of material on the second screen 220, the material undergoes multi-stage screening. Unscreened material gradually moves and is discharged from each screen layer. The entire process is smooth and continuous, meeting the needs of large-scale tobacco processing and improving production efficiency. Through multi-stage screening and reciprocating movement, the device effectively reduces the accumulation of clumps of tobacco shreds, lowering the risk of air classifier blockage (in traditional methods, excessive clumps of tobacco shreds can cause blockage). The device operates stably, reducing production interruptions due to equipment failure and improving production stability and reliability.

[0036] like Figure 1 As shown, in one embodiment, the number of swing arms 300 is at least two.

[0037] For example, two swing arms 300 are provided, located on both sides of the first screen 210. In another embodiment, four swing arms 300 are provided, with two swing arms 300 located on one side of the first screen 210 and the other two swing arms 300 located on the other side of the first screen 210. Of course, other numbers of swing arms 300 can also be provided, such as five, six, or eight.

[0038] like Figure 1 As shown, in one embodiment, the loose tobacco shred screening device further includes a separator 240, which is vertically fixed to the second screen 220 for pre-dispersing the material. The reciprocating movement of the second screen 220 drives the separator 240 to reciprocate. Initially, the material is placed on the separator 240, and the reciprocating movement of the second screen 220 drives the separator 240 to reciprocate, thus separating and dispersing the clumps of material, thereby pre-dispersing the material.

[0039] The separator 240 is, for example, a plate structure. In other embodiments, the separator 240 is configured as rods arranged sequentially along a straight line.

[0040] Initially, the material may exhibit significant clumping. The separator 240, moving reciprocally with the second screen 220, directly cuts and separates the clumped material placed upon it. Whether it's the plate-structured separator 240 or the rod-shaped separators arranged in a straight line, during reciprocating motion, they can utilize their edges or the gaps between the rods to divide large clumps of material into smaller pieces, breaking up the tight entanglement and aggregation between materials. This lays a good foundation for subsequent, more detailed screening, greatly improving the looseness of the material.

[0041] The pre-dispersion of materials by the separator 240 ensures that the materials entering subsequent screening stages (such as screening tank 230 and first screen 210) have a certain degree of looseness, reducing the risk of clogging of subsequent screens by larger agglomerates. Subsequent screens no longer need to spend a lot of time and energy processing large agglomerates, allowing them to focus more on the precise screening of smaller particles, thereby improving the efficiency of the entire screening process, shortening screening time, and reducing equipment energy consumption.

[0042] The pre-dispersed material has a more uniform particle size and a more reasonable distribution. This allows subsequent screening to more accurately separate qualified tobacco from impurities and substandard particles, improving the precision and accuracy of screening. This better meets the high requirements of tobacco processing for the purity and quality of tobacco, producing tobacco products that better meet standards.

[0043] The separator 240 helps maintain a uniform distribution of material on the second screen 220, avoiding problems such as increased equipment vibration and unstable operation caused by localized material accumulation. Stable material distribution and good screening conditions can reduce the frequency of equipment failures, extend the service life of the equipment, reduce maintenance costs, and ensure the long-term and stable operation of the loose tobacco screening device, providing a reliable guarantee for tobacco processing and production.

[0044] like Figure 1 As shown, in one embodiment, the number of spacers 240 is at least two, and at least two spacers 240 are spaced apart.

[0045] For example, the separator 240 is configured as a plate structure, and the separators of the plate structure are arranged at intervals, such as two, three or four.

[0046] In another embodiment, the separator 240 is configured as a rod structure, each separator 240 including a plurality of rods distributed sequentially along a straight line, and the separator 240 is configured in two, three or four, etc., with the rods of different separators 240 distributed along different straight lines and the different straight lines being arranged in parallel.

[0047] In one embodiment, the mesh width of the first screen 210 is 1 mm.

[0048] In one embodiment, the mesh width of the second screen 220 is 3 mm.

[0049] In one embodiment, the width of the sieve opening is 2.5 mm.

[0050] like Figure 1 As shown, in one embodiment, the swing arm 300 has two ends, the middle part of the swing arm 300 is rotatably mounted on the first screen 210, and one end of the swing arm 300 is hinged to the screening groove 230.

[0051] The loose tobacco shred screening device also includes a collector 400, which is hinged to the other end of the swing arm 300. The swing arm 300 swings to drive the screening trough 230 and the collector 400 to move back and forth, and the material screened out from the first screen 210 falls into the collector 400.

[0052] For example, the collector 400 includes a frame and a collection plate. The frame is hinged to the other end of the swing arm 300, and the collection plate is fixedly mounted on the frame. Material screened out from the first screen 210 falls onto the collection plate. The swing arm 300 swings to drive the frame and the collection plate to move back and forth, so that the material on the collection plate gradually moves and is discharged from the collection plate.

[0053] The collector 400 is designed to collect materials screened off the first screen 210. These materials are often small in size, such as tobacco residue, and are difficult to collect after they are scattered. Therefore, the collector 400 can prevent materials from scattering and being wasted.

[0054] In one embodiment, the loose tobacco shred screening device further includes a first conveying component disposed at the end of the collector 400 for conveying the material discharged from the collector 400. The first conveying component conveys the material discharged from the collector 400 to a storage device, such as a shredded tobacco collection box.

[0055] For example, the first conveying component includes, but is not limited to, a conveyor belt or a conveyor chain bucket.

[0056] In one embodiment, the loose tobacco shredding device further includes a second conveying component disposed at the end of the first screen 210 for conveying the material discharged from the first screen 210. The second conveying component conveys the material discharged from the first screen 210 to the next process equipment, such as to an air classifier.

[0057] For example, the second conveying component includes, but is not limited to, a conveyor belt or a conveyor chain bucket.

[0058] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0059] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. 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.

Claims

1. A tobacco shred loose screening device characterised in that, include: A rack (100) is provided to provide a mounting base; The first screen (210) is fixedly mounted on the frame (100); A swing arm (300) is rotatably mounted on the first screen (210); The screening trough (230) has screening holes on its bottom wall. The material that is screened out by the screening trough (230) enters the first screen (210) for further screening. The screening trough (230) is connected to the swing arm (300). The swing arm (300) swings and drives the screening trough (230) to move back and forth, so that the screening trough (230) drives the material to move on the screening trough (230) while screening the material. The second screen (220) is fixedly installed in the screening trough (230). The material screened out by the second screen (220) enters the screening trough (230) for further screening. The gap width of the screen holes on the second screen (220) is greater than the gap width of the screening holes, and the gap width of the screening holes is greater than the gap width of the screen holes on the first screen (210).

2. A tobacco loose screening device according to claim 1, characterised in that, The number of swing arms (300) is at least two.

3. A tobacco loose screening device according to claim 1, characterised in that, It also includes a separator (240), which is vertically fixed to the second screen (220) for pre-dispersing materials.

4. A tobacco loose screening device according to claim 3, characterised in that, The number of the separators (240) is at least two, and the at least two separators (240) are spaced apart.

5. A tobacco loosening and sizing apparatus according to claim 1, wherein The mesh gap width of the first screen (210) is 1 mm.

6. A tobacco loosening and sizing apparatus according to claim 1, characterised in that, The mesh width of the second screen (220) is 3mm.

7. A tobacco loosening and sizing apparatus according to claim 1, wherein The gap width of the sieve holes is 2.5 mm.

8. A tobacco loose screening device according to claim 1, characterised in that, The swing arm (300) has two ends, the middle part of the swing arm (300) is rotatably mounted on the first screen (210), and one end of the swing arm (300) is hinged to the screening trough (230). The loose tobacco shred screening device also includes a collector (400), which is hinged to the other end of the swing arm (300). The swing arm (300) swings to drive the screening trough (230) and the collector (400) to move back and forth, and the material screened off from the first screen (210) falls into the collector (400).

9. A tobacco loose screening device according to claim 8, characterised in that, It also includes a first conveying assembly disposed at the end of the collector (400) for conveying material discharged from the collector (400).

10. A tobacco loose screening device according to claim 1 characterised in that, It also includes a second conveying assembly disposed at the end of the first screen (210) for conveying material discharged from the first screen (210).

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