A method for processing cut tobacco with adjustable size

Abstract

The present invention provides a method for processing cut tobacco with adjustable size, which is characterized by including the following technological steps: 1) primary and secondary preliminary screening, 2) primary and secondary medium screening, 3) primary first cutting, 4) primary and secondary fine screening, 5) primary second cutting, 6) secondary preliminary screening and cutting, 7) secondary medium screening and cutting, 8) secondary fine screening and cutting. The super-large pieces and some large pieces of cut tobacco are effectively controlled, meeting the requirements of reducing the ratio of super-large pieces, controlling the ratio of large pieces, and increasing the ratio of medium pieces. The present invention is efficient, controllable, and can operate online, and can flexibly adjust parameters according to actual needs, so as to efficiently and controllably conduct effective screening on super-large pieces and large pieces of tobacco leaves, improve the size uniformity of cut tobacco, and provide reliable technical support for further improving the quality of cut tobacco.

Description

Technical Field

[0001] The present invention belongs to the technical field of tobacco processing and relates to a method for processing cut tobacco with adjustable size. Background Art

[0002] At present, for the finished cut tobacco produced by domestic threshing and redrying processing enterprises, the size ratio is usually as follows: there are many large pieces and few medium pieces, especially the ratio of extra-large pieces can reach more than 20%. With the launch of slender cigarette sticks and medium-slender cigarette sticks, they have been well received by people, which has promoted the rapid development of slender cigarette sticks and medium-slender cigarette sticks, and has prompted threshing and redrying enterprises to reduce the ratio of extra-large pieces as much as possible, control the ratio of large pieces, and increase the ratio of medium pieces to meet the requirements of cigarette enterprises for the size of cut tobacco after threshing.

[0003] To achieve the above goals, some threshing and redrying enterprises attempt to adjust the size of the cut tobacco leaves after threshing through the following methods: 1) Optimize process parameters such as the rotation speed of the beating roller and the air separation wind speed of the tobacco leaf cracking machine in the threshing process; 2) After threshing, screen out extra-large pieces and some large pieces through a vibrating screen, and then send them back to the threshing machine for threshing. The first method reduces the effective operation rate of the threshing machine, affects the leaf output rate and the medium piece rate, and also increases the fragmentation rate; the second method not only increases the processing capacity of the threshing machine and burdens the entire production line, but also in the screening process, due to the large flow of cut tobacco, it is easy to stack when entering the screening machine, affecting the screening effect. Therefore, it is necessary to improve the existing technology. Summary of the Invention

[0004] The present invention aims to provide a method for processing cut tobacco with adjustable size to meet the requirements of cigarette production for reducing the ratio of extra-large pieces, controlling the ratio of large pieces, and increasing the ratio of medium pieces of cut tobacco.

[0005] The present invention is completed through the following technical solutions: A method for processing cut tobacco with adjustable size, characterized by including the following technological steps:

[0006] 1) Primary and secondary preliminary screening: Feed a large flow of cut tobacco onto the primary preliminary screening roller, control the gap of the primary preliminary screening roller to be 25×40 mm - 25×50 mm, and the rotation speed to be 200 - 300 r / min, perform primary preliminary screening and uniform cloth feeding to obtain the cut tobacco on the screen of the primary preliminary screening and the cut tobacco under the screen of the primary preliminary screening; Feed the cut tobacco under the screen of the primary preliminary screening onto the secondary preliminary screening roller, control the gap of the secondary preliminary screening roller to be 24×28 mm - 24×35 mm, and the rotation speed to be 150 - 250 r / min, perform secondary preliminary screening to obtain the cut tobacco on the screen of the secondary preliminary screening and the cut tobacco under the screen of the secondary preliminary screening; The cut tobacco under the screen of the secondary preliminary screening is qualified cut tobacco and is directly discharged;

[0007] 2) Primary and secondary intermediate screening: The on-screen cut tobacco from the primary preliminary screening in step 1) is fed onto the primary intermediate screening roller. Control the gap of the primary intermediate screening roller to be 25×40 mm - 25×50 mm and the rotation speed to be 200 - 300 r / min for primary intermediate screening to obtain on-screen cut tobacco and off-screen cut tobacco from the primary intermediate screening; The off-screen cut tobacco from the primary intermediate screening is fed onto the secondary intermediate screening roller. Control the gap of the secondary intermediate screening roller to be 24×28 mm - 24×35 mm and the rotation speed to be 150 - 250 r / min for secondary intermediate screening to obtain on-screen cut tobacco and off-screen cut tobacco from the secondary intermediate screening; The off-screen cut tobacco from the secondary intermediate screening is qualified cut tobacco and is directly discharged;

[0008] 3) Primary first cutting: The on-screen cut tobacco from the primary intermediate screening in step 2) is fed onto the first cutting knife roller. Control the rotation speed of the first cutting knife roller to be 250 - 450 r / min to perform primary cutting on the on-screen cut tobacco from the primary intermediate screening to obtain cut tobacco after the first cutting and uncut cut tobacco;

[0009] 4) Primary and secondary fine screening: The uncut cut tobacco in step 3) is fed onto the primary fine screening roller. Control the gap of the primary fine screening roller to be 24×28 mm - 24×35 mm and the rotation speed to be 200 - 350 r / min for primary fine screening to obtain on-screen cut tobacco and off-screen cut tobacco from the primary fine screening; The off-screen cut tobacco from the primary fine screening and the cut tobacco after the first cutting in step 3) are both fed onto the secondary fine screening roller. Control the gap of the secondary fine screening roller to be 24×28 mm - 24×35 mm and the rotation speed to be 150 - 250 r / min for secondary fine screening to obtain on-screen cut tobacco and off-screen cut tobacco from the secondary fine screening; The off-screen cut tobacco from the secondary fine screening is qualified cut tobacco and is directly discharged;

[0010] 5) Primary second cutting: The on-screen cut tobacco from the primary fine screening in step 4) is fed onto the second cutting knife roller. Control the rotation speed of the second cutting knife roller to be 250 - 450 r / min to perform secondary cutting on the on-screen cut tobacco from the primary fine screening to obtain qualified cut tobacco and directly discharge it;

[0011] 6) Secondary preliminary screening and cutting: The on-screen cut tobacco from the secondary preliminary screening in step 1) is fed onto the third cutting knife roller. Control the rotation speed of the third cutting knife roller to be 170 - 300 r / min to perform cutting on the on-screen cut tobacco from the secondary preliminary screening to obtain qualified cut tobacco and directly discharge it;

[0012] 7) Secondary intermediate screening and cutting: The on-screen cut tobacco from the secondary intermediate screening in step 2) is fed onto the fourth cutting knife roller. Control the rotation speed of the fourth cutting knife roller to be 170 - 300 r / min to perform cutting on the on-screen cut tobacco from the secondary intermediate screening to obtain qualified cut tobacco and directly discharge it;

[0013] 8) Secondary fine screening and cutting: The oversize cut tobacco from the secondary fine screening in step 4) is fed onto the fifth cutting knife roller. The rotation speed of the fifth cutting knife roller is controlled at 170 - 300 r / min to cut the oversize cut tobacco from the secondary fine screening, obtaining qualified cut tobacco, which is directly discharged.

[0014] The inlet flow rate of the large - flow cut tobacco in step 1) is 10000 - 15000 kg / h. After primary rough screening, primary medium screening, primary fine screening, secondary rough screening, secondary medium screening, and secondary fine screening, 50% of the undersize cut tobacco is qualified cut tobacco and is directly discharged. The remaining 50% of the over - large and large cut tobacco becomes qualified cut tobacco after being cut once, twice, three times, four times, and five times in sequence and is directly discharged.

[0015] The primary rough screening roller, primary medium screening roller, primary fine screening roller, secondary rough screening roller, secondary medium screening roller, and secondary fine screening roller are all composed of multiple juxtaposed and spaced screening rollers and their driving mechanisms. Among them: Each roller includes a roller shaft, and a number of roller teeth sequentially and spacedly sleeved on the roller shaft. The two ends of the roller shaft are rotationally connected with pedestal bearings arranged on the shell. The driving mechanism includes a power machine, a driving pulley sleeved on the main shaft of the power machine, and the driving pulley is connected with a driven pulley arranged on the roller shaft through a transmission belt, so as to drive each roller to rotate through the driving mechanism and convey and screen the cut tobacco through multiple rollers.

[0016] The roller teeth are set as polygonal pieces and multi - angular pieces. A roller shaft hole for connecting with the roller shaft is provided at the center of each roller tooth. The two roller teeth are separated by a shaft sleeve. Among two adjacent screening rollers: The roller teeth of one are polygonal pieces, and the roller teeth of the other are multi - angular pieces. Alternately setting like this constitutes the primary screening roller. Obviously, the roller tooth shapes on all screening rollers can be polygonal pieces or can all be multi - angular pieces to control the screening of the cut tobacco size.

[0017] The roller tooth diameters of the primary rough screening roller, primary medium screening roller, and primary fine screening roller are larger than those of the secondary rough screening roller, secondary medium screening roller, and secondary fine screening roller.

[0018] The first and second cutting knife rollers both include a rotating cutting roller, a number of moving cutter disks spacedly arranged on the rotating cutting roller, and a number of fixed cutter blades arranged on one side of the rotating cutting roller and mating with the moving cutter disks. Among them:

[0019] The rotary cutting roller includes a roller shaft, a number of moving cutter discs spaced on the roller shaft. Both ends of the roller shaft are rotationally and matingly connected to pedestal bearings provided on the housing. One end of the roller shaft is sleeved with a driven pulley, and the driven pulley is matingly connected to a driving pulley provided on the main shaft of a power machine through a transmission belt. Sleeve bushes are provided between every two moving cutter discs, and several sleeve bushes with different lengths are provided according to needs, so as to replace the corresponding sleeve bushes according to needs and adjust the spacing between every two moving cutter discs. The center of the moving cutter disc is provided with a shaft hole sleeved on the roller shaft, and the outer edge is provided with a plurality of strip-shaped blades evenly arranged in a circle around the shaft hole and having cutting edges on their working sides. The inner ends of the plurality of strip-shaped blades are integrally connected to the outer edge of the shaft hole, and the outer ends extend outwards. Limiting grooves and limiting protrusions are mutually provided on the shaft hole and the roller shaft to facilitate fixing the moving cutter disc on the roller shaft.

[0020] The fixed cutter blades are all set as horizontal strip-shaped blades. One end of each fixed cutter blade is connected to a tool rest provided on the housing, and the other end is suspended. A cutting edge is provided on the working side of the suspended end, and this cutting edge cooperates with the cutting edge of the strip-shaped blade on the moving cutter disc to form a shearing cutting edge. The tool rest includes a horizontal sliding rod provided on the housing and arranged parallel to the rotary cutting roller. Fixed rods parallel to it are respectively provided on the upper and lower sides of the horizontal sliding rod. Baffles are connected to the front and rear ends of the fixed rods and the horizontal sliding rod. One end of the horizontal strip-shaped blade is sleeved on the sliding rod through a sliding hole on it, and the other end is suspended and matingly connected to the rotary cutter disc. Adjusting blocks are provided between every two horizontal strip-shaped blades, and several adjusting blocks with different widths are provided according to needs, so as to cut the tobacco slices through the cooperation of the fixed cutter blades and the moving cutter discs, and then adjust the spacing between every two horizontal strip-shaped blades according to needs.

[0021] A semi-circular screen is provided below the second cutting roller.

[0022] The diameter of the moving cutter disc in the first cutting roller is smaller than that of the moving cutter disc in the second cutting roller, so as to reduce breakage and at the same time fully cut the over-large tobacco slices into large slices and qualified tobacco slices.

[0023] The third, fourth, and fifth cutting rollers each include an upper rotary cutting roller and a lower rotary cutting roller respectively provided with a number of moving cutter discs, and the a number of moving cutter discs on the upper and lower rotary cutting rollers are mutually staggeredly matingly connected; and the structures of the upper rotary cutting roller, the lower rotary cutting roller and the moving cutter discs on them are the same as those of the rotary cutting rollers and the moving cutter discs on the first and second cutting rollers.

[0024] The diameter of the moving cutter discs of the third, fourth, and fifth cutting rollers is larger than that of the moving cutter discs in the first cutting roller and smaller than that of the moving cutter discs in the second cutting roller.

[0025] After a large flow of cut tobacco enters, through the primary screening roller, the intermediate screening roller, and the fine screening roller of the first stage of screening, while the cut tobacco is being screened, it is conveyed forward in a rolling manner. Some large pieces and qualified cut tobacco pieces fall onto the corresponding secondary screening rollers, continuously thinning the thickness of the cut tobacco on the first-stage screening rollers. Right below the primary screening roller of the first stage is the secondary primary screening roller, right below the intermediate screening roller of the first stage is the secondary intermediate screening roller, and right below the fine screening roller of the first stage is the secondary fine screening roller. Such a process layout makes the cut tobacco falling onto the corresponding secondary screening rollers more evenly distributed. During the process of simultaneous screening and cutting, the super-large pieces and some large pieces of cut tobacco are effectively controlled, meeting the requirements of reducing the ratio of super-large pieces, controlling the ratio of large pieces, and increasing the ratio of medium pieces.

[0026] The present invention has the following advantages and effects:

[0027] 1. The method for processing the cut tobacco structure with simultaneous double-layer screening and cutting provided by the present invention has a large screening flow rate, can achieve zero blockage, can better meet the actual flow production requirements of the threshing line, can jointly operate with the equipment on the current threshing and redrying line, and realize the automated and continuous production of threshing and redrying, thereby improving production efficiency;

[0028] 2. The hierarchical and segmented star roller screening method provided by the present invention can achieve the sorting requirements of cut tobacco pieces of different sizes by adjusting the size, rotation speed, and spacing of the star rollers, and has the advantages of high screening efficiency and wide adaptability, and can better achieve the predetermined goal of finely adjusting the size structure of tobacco leaves;

[0029] 3. The method of adding a cutting process between the segments of the star roller screen provided by the present invention can control the tearing strength of cut tobacco pieces of different sizes by adjusting the size, rotation speed, and the spacing between the moving knife and the fixed knife of the cutting knife, effectively decomposing super-large pieces and large pieces of tobacco leaves into qualified cut tobacco pieces, and improving the size uniformity of cut tobacco;

[0030] Generally speaking, the present invention has the characteristics of high efficiency, controllability, and online operation. The equipment used has a simple structure, convenient operation, stable operation, and easy maintenance, and can flexibly adjust parameters according to actual needs, thereby efficiently and controllably screening and decomposing super-large pieces and large pieces of tobacco leaves, improving the size uniformity of cut tobacco, and providing reliable technical support for further improving the quality of cut tobacco. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the equipment used in the present invention;

[0032] Figure 2 It is a schematic structural diagram of the screening roller;

[0033] Figure 3 It is a schematic structural diagram of the first and second cutting knife rollers;

[0034] Figure 4 ForFigure 3 Right view of

[0035] Figure 5 Structural schematic diagrams of the third, fourth, and fifth cutting rollers;

[0036] Figure 6 is Figure 5 right view of Specific implementation manner

[0037] The present invention will be further described below in conjunction with embodiments.

[0038] Embodiment 1

[0039] The size-adjustable cut tobacco processing method provided in this Embodiment 1 is completed on the upper and lower layers of screening rollers, where:

[0040] The upper-layer screening rollers include: a primary rough screening roller 1, a primary medium screening roller 2, a first cutting roller 3, a primary fine screening roller 4, and a second cutting roller 5, which are sequentially arranged from the feed inlet;

[0041] The lower-layer screening rollers include a secondary rough screening roller 12, a third cutting roller 11, a secondary medium screening roller 10, a fourth cutting roller 9, a secondary fine screening roller 8, and a fifth cutting roller 7 corresponding to the upper-layer screening rollers;

[0042] Both the upper and lower-layer screening rollers are installed in a housing 14 with a feed inlet and a discharge outlet thereon;

[0043] The size-adjustable cut tobacco processing method includes the following process steps:

[0044] 1) Feed large-flow cut tobacco with a flow rate of 12000 kg / h onto the primary rough screening roller 1, control the gap of the primary rough screening roller 1 to be 25×40 mm and the rotation speed to be 200 r / min, perform primary rough screening and uniform cloth feeding to obtain primary rough screening oversize cut tobacco (flow rate of 9000 kg / h) and primary rough screening undersize cut tobacco (flow rate of 3000 kg / h); Feed the primary rough screening undersize cut tobacco onto the secondary rough screening roller 12, control the gap of the secondary rough screening roller 12 to be 24×28 mm and the rotation speed to be 150 r / min, perform secondary rough screening to obtain secondary rough screening oversize cut tobacco (flow rate of 1000 kg / h) and secondary rough screening undersize cut tobacco (flow rate of 2000 kg / h); The secondary rough screening undersize cut tobacco is qualified cut tobacco and is directly discharged;

[0045] 2) The oversize cut tobacco from the first-stage primary screening in step 1) is fed onto the first-stage intermediate screening roller 2. The gap of the first-stage intermediate screening roller 2 is controlled to be 25×40 mm and the rotation speed is 200 r / min for the first-stage intermediate screening. Oversize cut tobacco from the first-stage intermediate screening (flow rate: 6000 kg / h) and undersize cut tobacco from the first-stage intermediate screening (flow rate: 3000 kg / h) are obtained. The oversize cut tobacco from the first-stage primary screening and the first-stage intermediate screening mainly consists of extra-large cut tobacco and some large cut tobacco, and remains on the upper screening roller for further screening. The undersize cut tobacco from the first-stage intermediate screening is fed onto the second-stage intermediate screening roller 10. The gap of the second-stage intermediate screening roller 10 is controlled to be 24×28 mm and the rotation speed is 150 r / min for the second-stage intermediate screening. Oversize cut tobacco from the second-stage intermediate screening (flow rate: 1000 kg / h) and undersize cut tobacco from the second-stage intermediate screening (flow rate: 2000 kg / h) are obtained. The undersize cut tobacco from the second-stage intermediate screening is qualified cut tobacco and is directly discharged.

[0046] 3) The oversize cut tobacco from the first-stage intermediate screening in step 2) (flow rate: 6000 kg / h) is fed onto the first cutting knife roller 3. The rotation speed of the first cutting knife roller 3 is controlled to be 250 r / min for the first cutting of the oversize cut tobacco from the first-stage intermediate screening. Cut tobacco after the first cutting (flow rate: 1000 kg / h) and uncut cut tobacco (flow rate: 5000 kg / h) are obtained. The uncut cut tobacco is extra-large cut tobacco and some large cut tobacco, and remains on the upper screening roller for further screening.

[0047] 4) The uncut cut tobacco in step 3) (flow rate: 5000 kg / h) is fed onto the first-stage fine screening roller 4. The gap of the first-stage fine screening roller 4 is controlled to be 24×28 mm and the rotation speed is 200 r / min for the first-stage fine screening. Oversize cut tobacco from the first-stage fine screening (flow rate: 2000 kg / h) and undersize cut tobacco from the first-stage fine screening (flow rate: 3000 kg / h) are obtained. The undersize cut tobacco from the first-stage fine screening and the cut tobacco after the first cutting in step 3) (flow rate: 1000 kg / h) are both fed onto the second-stage fine screening roller 8. The gap of the second-stage fine screening roller 8 is controlled to be 24×28 mm and the rotation speed is 150 r / min for the second-stage fine screening. Oversize cut tobacco from the second-stage fine screening (flow rate: 1000 kg / h) and undersize cut tobacco from the second-stage fine screening (flow rate: 3000 kg / h) are obtained. The undersize cut tobacco from the second-stage fine screening is qualified cut tobacco and is directly discharged.

[0048] 5) The oversize cut tobacco from the first-stage fine screening in step 4) (flow rate: 2000 kg / h) is fed onto the second cutting knife roller 5. The rotation speed of the second cutting knife roller 5 is controlled to be 250 r / min for the second cutting of the oversize cut tobacco from the first-stage fine screening. Qualified cut tobacco is obtained and directly discharged.

[0049] 6) The oversize cut tobacco from the second-stage primary screening in step 1) (flow rate: 1000 kg / h) is fed onto the third cutting knife roller 11. The rotation speed of the third cutting knife roller 11 is controlled to be 170 r / min for cutting the oversize cut tobacco from the second-stage primary screening. Qualified cut tobacco is obtained and directly discharged.

[0050] 7) The oversize cut tobacco from the secondary medium screening in step 2) (flow rate: 1000 kg / h) is fed onto the fourth cutting roller 9. The rotation speed of the fourth cutting roller 9 is controlled at 170 r / min to cut the oversize cut tobacco from the secondary medium screening, and the qualified cut tobacco is directly discharged.

[0051] 8) The oversize cut tobacco from the secondary fine screening in step 4) (flow rate: 1000 kg / h) is fed onto the fifth cutting roller 7. The rotation speed of the fifth cutting roller 7 is controlled at 170 r / min to cut the oversize cut tobacco from the secondary fine screening, and the qualified cut tobacco is directly discharged.

[0052] In this embodiment 1, the requirements of reducing the ratio of extra-large pieces, controlling the ratio of large pieces, and increasing the ratio of medium pieces are fully met, with the proportion of extra-large cut tobacco being 0, the ratio of large pieces being 30%, and the ratio of medium pieces being 70%.

[0053] The first-stage primary screening roller 1, the first-stage medium screening roller 2, the first-stage fine screening roller 4, the second-stage primary screening roller 12, the second-stage medium screening roller 10, and the second-stage fine screening roller 8 are each composed of multiple parallel and spaced screening rollers and their drive mechanisms. Among them: each roller includes a roller shaft 15, and a number of roller teeth sequentially and spacedly sleeved on the roller shaft 15. Both ends of the roller shaft 15 are rotationally mated with pedestal bearings provided on the housing 14. The drive mechanism includes a power machine, a driving belt pulley sleeved on the main shaft of the power machine, and the driving belt pulley is mated with a driven belt pulley provided on the roller shaft 15 through a transmission belt, so as to drive each roller to rotate through the drive mechanism and convey and screen the cut tobacco through multiple rollers.

[0054] The roller teeth are set as polygonal pieces 16 and multi-angular pieces 17. A roller shaft hole for mating with the roller shaft is provided at the center of each roller tooth, and two adjacent roller teeth are separated by a shaft sleeve. Among two adjacent screening rollers: the roller teeth of one roller are polygonal pieces 16, and the roller teeth of the other roller are multi-angular pieces 17. Alternately setting like this forms the first-stage screening roller. Obviously, the roller teeth shapes on all screening rollers can be polygonal pieces 16 or can all be multi-angular pieces 17 to control the screening of the cut tobacco size.

[0055] The roller teeth diameters of the first-stage primary screening roller 1, the first-stage medium screening roller 2, and the first-stage fine screening roller 4 are larger than those of the second-stage primary screening roller 12, the second-stage medium screening roller 10, and the second-stage fine screening roller 8.

[0056] The first and second cutting rollers 3 and 5 each include a rotating cutting roller, a number of moving cutter discs 30 spacedly provided on the rotating cutting roller, and a number of fixed cutter blades provided on one side of the rotating cutting roller and mating with the moving cutter discs. Among them:

[0057] The rotary cutting roller includes a roller shaft 31, several moving cutter disks 30 spaced on the roller shaft 31. Both ends of the roller shaft 31 are rotationally and matingly connected to pedestal bearings provided on the housing 14. A driven pulley 22 is sleeved on one end of the roller shaft 31, and the driven pulley 22 is matingly connected to a driving pulley provided on the main shaft of the power machine through a transmission belt. A sleeve 24 is provided between every two moving cutter disks 30, and several sleeves 24 with different lengths are provided according to needs, so as to adjust the distance between every two moving cutter disks 30 by replacing the sleeve 24 with the corresponding length as required. A shaft hole 34 sleeving the roller shaft 31 is provided in the center of the moving cutter disk 30, and a plurality of strip-shaped blades 32 with cutting edges 33 provided on their working sides are evenly arranged around the shaft hole 34 on the outer edge. The inner ends of the plurality of strip-shaped blades 32 are integrally connected to the outer edge of the shaft hole 34, and the outer ends extend outwards. Limiting grooves 36 and limiting protrusions 35 are respectively provided on the shaft hole 34 and the roller shaft 31 to facilitate fixing the moving cutter disk 30 on the roller shaft 31.

[0058] The fixed blades are all set as horizontal strip-shaped blades 28. One end of the horizontal strip-shaped blade 28 is connected to a tool rest 27 provided on the housing 14, and the other end is suspended. A cutting edge 37 is provided on the working side of the suspended end, and the cutting edge 37 cooperates with the cutting edge 33 of the strip-shaped blade 32 on the moving cutter disk 30 to form a shearing cutting edge. The tool rest 27 includes a horizontal slide bar 29 provided on the housing 14 and arranged parallel to the rotary cutting roller. Fixed bars 39 parallel to the horizontal slide bar 29 are respectively provided on the upper and lower sides of the horizontal slide bar 29. Baffles 25 are connected to the front and rear ends of the fixed bars 39 and the horizontal slide bar 29. One end of the horizontal strip-shaped blade 28 is sleeved on the slide bar 29 through a slide hole 38 on it, and the other end is suspended and matingly connected to the rotary cutter disk 30. Adjusting blocks 26 are provided between every two horizontal strip-shaped blades 28, and several adjusting blocks 26 with different widths are provided according to needs, so as to cut the tobacco leaves by the cooperation of the fixed blades and the moving cutter disk 30, and then adjust the distance between every two horizontal strip-shaped blades 28 by replacing the adjusting block 26 with the corresponding width as required.

[0059] A semi-circular screen 6 is provided below the second cutting roller 5.

[0060] The diameter of the moving cutter disk in the first cutting roller 3 is smaller than that of the moving cutter disk in the second cutting roller 5, so as to reduce breakage and at the same time fully cut the oversized tobacco leaves into qualified tobacco slices.

[0061] The third, fourth, and fifth cutting rollers 11, 9, and 7 all include an upper rotary cutting roller 18 and a lower rotary cutting roller 19 respectively provided with several moving cutter disks 30, and the several moving cutter disks on the upper and lower rotary cutting rollers 18 and 19 are matingly connected in a staggered manner; and the structures of the upper rotary cutting roller 18, the lower rotary cutting roller 19 and the moving cutter disks on them are the same as those of the rotary cutting rollers and the moving cutter disks 30 on the first and second cutting rollers 3 and 5.

[0062] The moving cutter discs of the third, fourth, and fifth cutting rollers have a diameter greater than that of the moving cutter discs in the first cutting roller and less than that of the moving cutter discs in the second cutting roller.

[0063] Embodiment 2

[0064] The size-adjustable cut tobacco processing method provided in this Embodiment 2 uses the same equipment as in Embodiment 1 and includes the following steps:

[0065] 1) Feed large-flow cut tobacco with a flow rate of 12,000 kg / h onto the first-stage primary screening roller 1, control the gap of the first-stage primary screening roller 1 to be 25×50 mm and the rotation speed to be 300 r / min, perform first-stage primary screening and uniform cloth feeding to obtain first-stage primary screening oversize cut tobacco and first-stage primary screening undersize cut tobacco; the first-stage primary screening undersize cut tobacco is sent onto the second-stage primary screening roller 12, control the gap of the second-stage primary screening roller 12 to be 24×35 mm and the rotation speed to be 250 r / min, perform second-stage primary screening to obtain second-stage primary screening oversize cut tobacco and second-stage primary screening undersize cut tobacco; the second-stage primary screening undersize cut tobacco is qualified cut tobacco and is directly discharged;

[0066] 2) The first-stage primary screening oversize cut tobacco in step 1) is sent onto the first-stage intermediate screening roller 2, control the gap of the first-stage intermediate screening roller 2 to be 25×50 mm and the rotation speed to be 300 r / min, perform first-stage intermediate screening to obtain first-stage intermediate screening oversize cut tobacco and first-stage intermediate screening undersize cut tobacco; the first-stage primary screening and first-stage intermediate screening oversize cut tobacco are mainly 15% of extra-large cut tobacco and some large cut tobacco, and remain on the upper screening roller for continuous screening. The first-stage intermediate screening undersize cut tobacco is sent onto the second-stage intermediate screening roller 10, control the gap of the second-stage intermediate screening roller 10 to be 24×35 mm and the rotation speed to be 250 r / min, perform second-stage intermediate screening to obtain second-stage intermediate screening oversize cut tobacco and second-stage intermediate screening undersize cut tobacco; the second-stage intermediate screening undersize cut tobacco is qualified cut tobacco and is directly discharged;

[0067] 3) The first-stage intermediate screening oversize cut tobacco in step 2) is sent onto the first cutting roller 3, control the rotation speed of the first cutting roller 3 to be 450 r / min, perform primary cutting on the first-stage intermediate screening oversize cut tobacco to obtain cut tobacco after primary cutting and uncut cut tobacco; the uncut cut tobacco is 10% of extra-large cut tobacco and some large cut tobacco, and remains on the upper screening roller for continuous screening;

[0068] 4) The uncut cut tobacco in step 3) is sent onto the first-stage fine screening roller 4, control the gap of the first-stage fine screening roller 4 to be 24×35 mm and the rotation speed to be 350 r / min, perform first-stage fine screening to obtain first-stage fine screening oversize cut tobacco and first-stage fine screening undersize cut tobacco; the first-stage fine screening undersize cut tobacco and the cut tobacco after primary cutting in step 3) are both sent onto the second-stage fine screening roller 8, control the gap of the second-stage fine screening roller 8 to be 24×28 mm - 24×35 mm and the rotation speed to be 250 r / min, perform second-stage fine screening to obtain second-stage fine screening oversize cut tobacco and second-stage fine screening undersize cut tobacco; the second-stage fine screening undersize cut tobacco is qualified cut tobacco and is directly discharged;

[0069] 5) The oversize cut tobacco from the first-stage fine screening in step 4) is fed onto the second cutting and chopping roller 5. The rotation speed of the second cutting and chopping roller 5 is controlled at 450 r / min to perform secondary cutting and chopping on the oversize cut tobacco from the first-stage fine screening, obtaining qualified cut tobacco, which is directly discharged.

[0070] 6) The oversize cut tobacco from the second-stage preliminary screening in step 1) is fed onto the third cutting and chopping roller 11. The rotation speed of the third cutting and chopping roller 11 is controlled at 300 r / min to perform cutting and chopping on the oversize cut tobacco from the second-stage preliminary screening, obtaining qualified cut tobacco, which is directly discharged.

[0071] 7) The oversize cut tobacco from the second-stage medium screening in step 2) is fed onto the fourth cutting and chopping roller 9. The rotation speed of the fourth cutting and chopping roller 9 is controlled at 300 r / min to perform cutting and chopping on the oversize cut tobacco from the second-stage medium screening, obtaining qualified cut tobacco, which is directly discharged.

[0072] 8) The oversize cut tobacco from the second-stage fine screening in step 4) is fed onto the fifth cutting and chopping roller 7. The rotation speed of the fifth cutting and chopping roller 7 is controlled at 300 r / min to perform cutting and chopping on the oversize cut tobacco from the second-stage fine screening, obtaining qualified cut tobacco, which is directly discharged.

[0073] This embodiment 2 fully meets the requirements of reducing the ratio of extra-large pieces, controlling the ratio of large pieces, and increasing the ratio of medium pieces, with the proportion of extra-large cut tobacco being 0, the ratio of large pieces being 35%, and the ratio of medium pieces being 65%.

[0074] Embodiment 3

[0075] The size-adjustable cut tobacco processing method provided in this embodiment 3 uses the same equipment as in Embodiment 1 and includes the following steps:

[0076] 1) Feed large-flow cut tobacco with a flow rate of 12000 kg / h onto the first-stage preliminary screening roller 1. Control the gap of the first-stage preliminary screening roller 1 at 25×45 mm and the rotation speed at 250 r / min to perform first-stage preliminary screening and uniform cloth feeding, obtaining oversize cut tobacco from the first-stage preliminary screening and undersize cut tobacco from the first-stage preliminary screening; the undersize cut tobacco from the first-stage preliminary screening is fed onto the second-stage preliminary screening roller 12. Control the gap of the second-stage preliminary screening roller 12 at 24×30 mm and the rotation speed at 200 r / min to perform second-stage preliminary screening, obtaining oversize cut tobacco from the second-stage preliminary screening and undersize cut tobacco from the second-stage preliminary screening; the undersize cut tobacco from the second-stage preliminary screening is qualified cut tobacco, which is directly discharged.

[0077] 2) The oversize cut tobacco from the first-stage primary screening in step 1) is fed onto the first-stage intermediate screening roller 2. The gap of the first-stage intermediate screening roller 2 is controlled to be 25×45 mm and the rotation speed is 250 r / min for the first-stage intermediate screening, obtaining the oversize cut tobacco from the first-stage intermediate screening and the undersize cut tobacco from the first-stage intermediate screening. The oversize cut tobacco from the first-stage primary screening and the first-stage intermediate screening mainly consists of 12% extra-large cut tobacco and some large cut tobacco, and remains on the upper screening roller for continuous screening. The undersize cut tobacco from the first-stage intermediate screening is fed onto the second-stage intermediate screening roller 10. The gap of the second-stage intermediate screening roller 10 is controlled to be 24×30 mm and the rotation speed is 200 r / min for the second-stage intermediate screening, obtaining the oversize cut tobacco from the second-stage intermediate screening and the undersize cut tobacco from the second-stage intermediate screening. The undersize cut tobacco from the second-stage intermediate screening is qualified cut tobacco and is directly discharged.

[0078] 3) The oversize cut tobacco from the first-stage intermediate screening in step 2) is fed onto the first cutting knife roller 3. The rotation speed of the first cutting knife roller 3 is controlled to be 350 r / min to perform primary cutting on the oversize cut tobacco from the first-stage intermediate screening, obtaining the cut tobacco after primary cutting and the uncut cut tobacco. The uncut cut tobacco is 12% extra-large cut tobacco and some large cut tobacco, and remains on the upper screening roller for continuous screening.

[0079] 4) The uncut cut tobacco in step 3) is fed onto the first-stage fine screening roller 4. The gap of the first-stage fine screening roller 4 is controlled to be 24×30 mm and the rotation speed is 300 r / min for the first-stage fine screening, obtaining the oversize cut tobacco from the first-stage fine screening and the undersize cut tobacco from the first-stage fine screening. The undersize cut tobacco from the first-stage fine screening and the cut tobacco after primary cutting in step 3) are both fed onto the second-stage fine screening roller 8. The gap of the second-stage fine screening roller 8 is controlled to be 24×30 mm and the rotation speed is 200 r / min for the second-stage fine screening, obtaining the oversize cut tobacco from the second-stage fine screening and the undersize cut tobacco from the second-stage fine screening. The undersize cut tobacco from the second-stage fine screening is qualified cut tobacco and is directly discharged.

[0080] 5) The oversize cut tobacco from the first-stage fine screening in step 4) is fed onto the second cutting knife roller 5. The rotation speed of the second cutting knife roller 5 is controlled to be 350 r / min to perform secondary cutting on the oversize cut tobacco from the first-stage fine screening, obtaining qualified cut tobacco which is directly discharged.

[0081] 6) The oversize cut tobacco from the second-stage primary screening in step 1) is fed onto the third cutting knife roller 11. The rotation speed of the third cutting knife roller 11 is controlled to be 250 r / min to perform cutting on the oversize cut tobacco from the second-stage primary screening, obtaining qualified cut tobacco which is directly discharged.

[0082] 7) The oversize cut tobacco from the second-stage intermediate screening in step 2) is fed onto the fourth cutting knife roller 9. The rotation speed of the fourth cutting knife roller 9 is controlled to be 250 r / min to perform cutting on the oversize cut tobacco from the second-stage intermediate screening, obtaining qualified cut tobacco which is directly discharged.

[0083] 8) The oversize cut tobacco from the second-stage fine screening in step 4) is fed onto the fifth cutting knife roller 7. The rotation speed of the fifth cutting knife roller 7 is controlled to be 250 r / min to perform cutting on the oversize cut tobacco from the second-stage fine screening, obtaining qualified cut tobacco which is directly discharged.

[0084] This Example 3 fully meets the requirements of reducing the ratio of extra-large slices, controlling the ratio of large slices, and increasing the ratio of medium slices, resulting in a proportion of extra-large sliced tobacco of 0, a ratio of large slices of 32%, and a ratio of medium slices of 68%.

Claims

1. A method for processing cut tobacco with adjustable size, characterized in that It includes the following technological steps: 1) Primary and secondary preliminary screening: Feed large-flow cut tobacco sheets onto the primary preliminary screening roller, control the gap of the primary preliminary screening roller to be 25×40 mm - 25×50 mm, and the rotational speed to be 200 - 300 r / min, conduct primary preliminary screening and uniform cloth feeding to obtain the oversize cut tobacco sheets and undersize cut tobacco sheets from the primary preliminary screening; Feed the undersize cut tobacco sheets from the primary preliminary screening onto the secondary preliminary screening roller, control the gap of the secondary preliminary screening roller to be 24×28 mm - 24×35 mm, and the rotational speed to be 150 - 250 r / min, conduct secondary preliminary screening to obtain the oversize cut tobacco sheets and undersize cut tobacco sheets from the secondary preliminary screening; The undersize cut tobacco sheets from the secondary preliminary screening are qualified cut tobacco sheets and are directly discharged; 2) Primary and secondary medium screening: Feed the oversize cut tobacco sheets from the primary preliminary screening in step 1) onto the primary medium screening roller, control the gap of the primary medium screening roller to be 25×40 mm - 25×50 mm, and the rotational speed to be 200 - 300 r / min, conduct primary medium screening to obtain the oversize cut tobacco sheets and undersize cut tobacco sheets from the primary medium screening; Feed the undersize cut tobacco sheets from the primary medium screening onto the secondary medium screening roller, control the gap of the secondary medium screening roller to be 24×28 mm - 24×35 mm, and the rotational speed to be 150 - 250 r / min, conduct secondary medium screening to obtain the oversize cut tobacco sheets and undersize cut tobacco sheets from the secondary medium screening; The undersize cut tobacco sheets from the secondary medium screening are qualified cut tobacco sheets and are directly discharged; 3) Primary first cutting: Feed the oversize cut tobacco sheets from the primary medium screening in step 2) onto the first cutting knife roller, control the rotational speed of the first cutting knife roller to be 250 - 450 r / min, conduct first cutting on the oversize cut tobacco sheets from the primary medium screening to obtain the cut tobacco sheets after the first cutting and the uncut cut tobacco sheets; 4) Primary and secondary fine screening: Feed the uncut cut tobacco sheets in step 3) onto the primary fine screening roller, control the gap of the primary fine screening roller to be 24×28 mm - 24×35 mm, and the rotational speed to be 200 - 350 r / min, conduct primary fine screening to obtain the oversize cut tobacco sheets and undersize cut tobacco sheets from the primary fine screening; Feed the undersize cut tobacco sheets from the primary fine screening and the cut tobacco sheets after the first cutting in step 3) onto the secondary fine screening roller, control the gap of the secondary fine screening roller to be 24×28 mm - 24×35 mm, and the rotational speed to be 150 - 250 r / min, conduct secondary fine screening to obtain the oversize cut tobacco sheets and undersize cut tobacco sheets from the secondary fine screening; The undersize cut tobacco sheets from the secondary fine screening are qualified cut tobacco sheets and are directly discharged; 5) Primary second cutting: Feed the oversize cut tobacco sheets from the primary fine screening in step 4) onto the second cutting knife roller, control the rotational speed of the second cutting knife roller to be 250 - 450 r / min, conduct second cutting on the oversize cut tobacco sheets from the primary fine screening to obtain qualified cut tobacco sheets and directly discharge them; 6) Secondary preliminary screening cutting: Feed the oversize cut tobacco sheets from the secondary preliminary screening in step 1) onto the third cutting knife roller, control the rotational speed of the third cutting knife roller to be 170 - 300 r / min, conduct cutting on the oversize cut tobacco sheets from the secondary preliminary screening to obtain qualified cut tobacco sheets and directly discharge them; 7) Secondary medium screening cutting: Feed the oversize cut tobacco sheets from the secondary medium screening in step 2) onto the fourth cutting knife roller, control the rotational speed of the fourth cutting knife roller to be 170 - 300 r / min, conduct cutting on the oversize cut tobacco sheets from the secondary medium screening to obtain qualified cut tobacco sheets and directly discharge them; 8) Secondary fine screening and cutting: The oversize cut tobacco from the secondary fine screening in step 4) is fed onto the fifth cutting roller. Control the rotational speed of the fifth cutting roller at 170 - 300 r / min to cut the oversize cut tobacco from the secondary fine screening, obtaining qualified cut tobacco, which is directly discharged.

2. The method for processing sliced tobacco with adjustable size according to claim 1, characterized in that The inlet flow rate of the large-flow cut tobacco in step 1) is 10,000 - 15,000 kg / h.

3. The size-adjustable cut tobacco processing method according to claim 1, characterized in that The primary coarse screening roller, primary medium screening roller, primary fine screening roller, secondary coarse screening roller, secondary medium screening roller, and secondary fine screening roller are all composed of multiple juxtaposed and spaced screening rollers and their driving mechanisms. Among them: Each roller includes a roller shaft, and several roller teeth sequentially and spacedly sleeved on the roller shaft. The two ends of the roller shaft are rotationally and matingly connected to the pedestal bearings provided on the housing. The driving mechanism includes a prime mover, a driving pulley sleeved on the main shaft of the prime mover, and the driving pulley is matingly connected to a driven pulley provided on the roller shaft through a transmission belt.

4. The size-adjustable cut tobacco processing method according to claim 3, characterized in that The roller teeth diameters of the primary coarse screening roller, primary medium screening roller, and primary fine screening roller are larger than those of the secondary coarse screening roller, secondary medium screening roller, and secondary fine screening roller.

5. The size-adjustable cut tobacco processing method according to claim 1, characterized in that Both the first and second cutting rollers include a rotating cutting roller, several moving cutter disks spacedly provided on the rotating cutting roller, and several fixed cutter blades provided on one side of the rotating cutting roller and mating with the moving cutter disks; among them: The rotating cutting roller includes a roller shaft, several moving cutter disks spacedly provided on the roller shaft. The two ends of the roller shaft are rotationally and matingly connected to the pedestal bearings provided on the housing. A driven pulley is sleeved on one end of the roller shaft, and the driven pulley is matingly connected to a driving pulley provided on the main shaft of the prime mover through a transmission belt; there are shaft sleeves provided between two adjacent moving cutter disks, and several shaft sleeves with different lengths are provided as required; The fixed cutter blades are all set as horizontal strip-shaped blades. One end of each fixed cutter blade is connected to a tool rest provided on the housing, and the other end is suspended. An edge is provided on the working side of the suspended end, and this edge cooperates with the edge of the strip-shaped blade on the moving cutter disk to form a shearing edge; the tool rest includes a horizontal slide bar provided on the housing and arranged parallel to the rotating cutting roller. Fixed bars parallel to it are respectively provided on the upper and lower sides of the horizontal slide bar. Baffles are connected to the front and rear ends of the fixed bars and the horizontal slide bar. One end of the horizontal strip-shaped blade is sleeved onto the slide bar through the sliding hole on it, and the other end is suspended and matingly connected to the rotating cutter disk. Adjusting blocks are provided between two adjacent horizontal strip-shaped blades, and several adjusting blocks with different widths are provided as required.

6. The size-adjustable cut tobacco processing method according to claim 1, characterized in that A semi-circular screen is provided below the second cutting roller.

7. The size-adjustable cut tobacco processing method according to claim 1, characterized in that The diameter of the moving cutter disks in the first cutting roller is smaller than that of the moving cutter disks in the second cutting roller.

8. The size-adjustable cut tobacco processing method according to claim 1, characterized in that The third, fourth, and fifth cutting rollers all include an upper rotating cutting roller and a lower rotating cutting roller respectively provided with several moving cutter disks, and the several moving cutter disks on the upper and lower rotating cutting rollers are matingly connected in an alternating manner.

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