A tobacco stem and tobacco grading and screening device

Abstract

The present invention provides a tobacco stem and tobacco grading and screening device, comprising a plurality of screening cylinders and a plurality of ash discharge valves, the ash discharge valves including an ash discharge bin, wherein a discharge blade is installed in the ash discharge bin, the upper end of the screening cylinder is connected to a first negative pressure fan, the lower end of the screening cylinder is connected to the ash discharge bin, and two adjacent screening cylinders are connected via a feed pipe, the first screening cylinder is also connected to the feed pipe, and the last screening cylinder is also connected to the discharge pipe. By adopting the technical solution of the present invention, the mixed raw materials enter each screening cylinder under the suction of the first negative pressure fan, and as the discharge blades continuously rotate, the heavier tobacco stems fall out of the bottom of the ash discharge bin, while the lighter tobacco is sent out through the discharge pipe, thereby obtaining tobacco stem and tobacco mixtures of different grades, so as to facilitate the production of cigarettes of different grades. Moreover, after multiple screenings, the mixed raw materials are obtained at the end of the discharge pipe with purer tobacco, thereby improving the utilization efficiency of the mixed raw materials and reducing the waste of raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette making equipment, and in particular to a tobacco stem and shredded tobacco grading and screening device. Background Art

[0002] At present, in tobacco manufacturing enterprises, a large number of automated production equipment are used in the production process of cigarettes, which greatly improves the production output of cigarettes and the economic benefits of enterprises. In the cigarette manufacturing process, various production equipment will produce and remove a large amount of tobacco stems every day. These tobacco stems contain a certain amount of tobacco, which can still be used as raw materials for cigarette production. However, if the stem mixture collected by tobacco enterprises is to be reused, it is necessary to first screen out the tobacco. In the prior art, various screening device structures are varied. For example, the patent document with publication number "CN206701736U" discloses a tobacco stem separation and air sorting device. The tobacco stem separation and air selection equipment includes a negative pressure exhaust impurity removal device, a secondary vibration screening device and a stem crushing air selection device. The negative pressure exhaust impurity removal device includes a tobacco stem impurity removal pipe, an impurity removal exhaust pipe and an impurity removal fan. The discharge port of the tobacco stem impurity removal pipe is connected to the feed port of the secondary vibration screening device, and the impurity removal fan is connected to the tobacco stem impurity removal pipe through the impurity removal exhaust pipe; the secondary vibration screening device is provided with an upper bend screen with distributed linear mesh holes and a lower large stem screen with distributed tobacco stem holes; the stem crushing air selection device includes a stem crushing air selection pipe, a negative pressure exhaust pipe and a stem crushing air selection fan. The feed port of the stem crushing air selection pipe is connected to the discharge port at the lower part of the secondary vibration screening device, and the stem crushing air selection fan is connected to the stem crushing air selection pipe through the negative pressure exhaust pipe. However, the patent document only focuses on the screening of tobacco stems, without noticing that some directly reusable tobacco is still mixed in the stem mixture, nor is the tar in the mixture screened out, which affects the recycling efficiency of the material. In addition, the air separation equipment recorded in the patent document has a relatively complex structure and a high manufacturing cost, making it difficult to promote and apply in tobacco companies. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a tobacco stem and shredded tobacco grading and screening device.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a tobacco stem and shredded tobacco grading and screening device, comprising a plurality of screening cylinders and a plurality of ash discharge valves, wherein the ash discharge valves include an ash discharge bin, in which discharge blades are installed, the upper end of the screening cylinder is connected to a first negative pressure fan, the lower end of the screening cylinder is connected to the ash discharge bin, two adjacent screening cylinders are connected via a feeding pipe, the first screening cylinder is also connected to the feeding pipe, and the last screening cylinder is also connected to the discharge pipe.

[0006] The tobacco stem and shredded tobacco grading and screening equipment also includes a feeding device and multiple collection boxes. The feeding device includes a vibrating plate, one side of the vibrating plate serves as an input end, and the other side of the vibrating plate serves as an output end. The output end is connected to the feed pipe, and the collection box is placed under the ash unloading bin. The upper end of each collection box is also connected to the second negative pressure fan, and each collection box is also connected to one end of the return pipe, and the other end of the return pipe is connected to the input end.

[0007] The feeding device also includes a driving motor, a driving wheel, a support rod and a slider. The vibrating plate is fixedly connected to the slider. One end of the support rod is hinged to the slider. The other end of the support rod is hinged to the driving wheel through an axle pin. The driving wheel is also coaxially fixed to the output shaft of the driving motor, and the axial spacing between the axle pin and the output shaft of the driving motor is greater than zero.

[0008] The surface of the vibrating plate is also provided with a plurality of screening grooves running through the left and right sides thereof.

[0009] The feeding device further comprises a coarse screen, one end of which is fixedly connected to the input end, and the other end of which extends outward.

[0010] The feeding device further comprises a feed hopper, the lower end of which is aligned with the coarse screen.

[0011] The feed pipe is also fixedly connected to the primary screening bin, primary screening blades are installed in the primary screening bin, and the output end also extends into the primary screening bin.

[0012] The height difference between the output end and the input end is greater than zero.

[0013] The discharge pipe is also connected to a dust collector.

[0014] The number of the screening cylinders is 3.

[0015] The beneficial effect of the present invention is that: when the technical solution of the present invention is adopted, when the mixed raw material of tobacco stems and tobacco shreds is fed into the feed pipe, the mixed raw material enters each screening cylinder in turn along the feed pipe under the suction of the first negative pressure fan, and the unloading blades rotate continuously, so that the heavier tobacco stems fall out from the bottom of the ash unloading bin, and the lighter tobacco shreds are sent out through the discharge pipe, so that tobacco stem and tobacco shreds of different grades are obtained below the ash unloading valve, so that tobacco stem and tobacco shreds of different grades can be used to produce cigarettes of different grades, and the mixed raw materials are screened by multiple screening cylinders to obtain purer tobacco shreds at the end of the discharge pipe, thereby improving the utilization efficiency of the mixed raw materials and reducing raw material waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a right side isometric view of the present invention;

[0017] Figure 2It is a left-side isometric view of the present invention;

[0018] Figure 3 It is a back-facing isometric view of the present invention;

[0019] Figure 4 It is a front view of the present invention;

[0020] Figure 5 is a top view of the present invention;

[0021] Figure 6 It is a right side view of the present invention;

[0022] Figure 7 It is a front view of the feeding device of the present invention.

[0023] In the figure: 1-screening cylinder, 2-ash unloading valve, 3-first negative pressure fan, 4-feeding pipe, 5-feeding pipe, 6-discharging pipe, 7-feeding device, 8-second negative pressure fan, 9-return pipe, 10-primary screening bin, 11-primary screening blades, 12-dust collector, 21-ash unloading bin, 71-vibrating plate, 72-driving motor, 73-driving wheel, 74-support rod, 75-slider, 76-coarse screen, 77-feed hopper. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0025] like Figures 1 to 7 As shown, the present invention provides a tobacco stem and shredded tobacco grading and screening device, including multiple screening cylinders 1 and multiple ash discharge valves 2. The ash discharge valve 2 includes an ash discharge bin 21, and the ash discharge bin 21 is installed with discharge blades. The upper end of the screening cylinder 1 is connected to the first negative pressure fan 3, and the lower end of the screening cylinder 1 is connected to the ash discharge bin 21. Two adjacent screening cylinders 1 are connected by a feeding pipe 4. The first screening cylinder 1 is also connected to the feeding pipe 5, and the last screening cylinder 1 is also connected to the discharge pipe 6.

[0026] By adopting the technical solution of the present invention, when a mixture of tobacco stems and shredded tobacco is fed into the feed pipe, the mixture enters each screening cylinder in turn along the feed pipe under the suction of the first negative pressure fan, and the discharge blades rotate continuously, causing the heavier tobacco stems to fall out from the bottom of the ash discharge bin, while the lighter shredded tobacco is sent out through the discharge pipe, thereby obtaining tobacco stem and shredded tobacco mixtures of different grades below the ash discharge valve, so that tobacco stem and shredded tobacco mixtures of different grades can be used to produce cigarettes of different grades, and the mixed raw materials are screened by multiple screening cylinders to obtain purer shredded tobacco at the end of the discharge pipe, thereby improving the utilization efficiency of the mixed raw materials and reducing raw material waste.

[0027] Specifically, the tobacco stem and tobacco grading and screening equipment also includes a feeding device 7 and a plurality of collecting boxes. The feeding device 7 includes a vibrating plate 71, with one side of the vibrating plate 71 as the input end and the other side of the vibrating plate 71 as the output end. The output end is connected to the feed pipe 5. The collecting box is placed below the ash unloading bin 21. The upper end of each collecting box is also connected to the second negative pressure fan 8. Each collecting box is also connected to one end of the return pipe 9, and the other end of the return pipe 9 is connected to the input end. By adopting the technical solution of the present invention, tobacco stem and tobacco mixtures of corresponding different grades can be collected respectively through each collecting box, so that tobacco stem and tobacco mixtures of different grades can be used to produce cigarettes of different grades. If the grade of the collected tobacco stem and tobacco mixture is not satisfactory, the tobacco stem and tobacco mixture of the corresponding grade can be sent back to the feeding device 7 through the return pipe 9 to screen the tobacco stem and tobacco mixture again, change the proportion of tobacco stems in the tobacco stem and tobacco mixture, and obtain a tobacco stem and tobacco mixture that meets the required grade.

[0028] Furthermore, the feeding device 7 also includes a driving motor 72, a driving wheel 73, a support rod 74 and a slider 75. The vibration plate 71 is fixedly connected to the slider 75. One end of the support rod 74 is hinged to the slider 75. The other end of the support rod 74 is hinged to the driving wheel 73 through an axle pin. The driving wheel 73 is also coaxially fixed to the output shaft of the driving motor 72, and the axial distance between the axle pin and the output shaft of the driving motor 72 is greater than zero. The surface of the vibration plate 71 is also provided with a plurality of screening grooves running through its left and right sides. By adopting the technical solution of the present invention, when the mixed raw materials are conveyed by the vibration plate 71, the coarse tobacco stems in the mixed raw materials will overflow from the screening grooves through the vibration of the vibration plate 71, and fall back to the input end of the feeding device 7 in the direction opposite to the conveying direction, thereby completing the preliminary screening of the mixed raw materials.

[0029] Specifically, feeding device 7 also includes a coarse screen 76, one end of which is fixedly connected to the input end, and the other end of which extends outward. Feeding device 7 also includes a feed hopper 77, the lower end of which is aligned with coarse screen 76. Using the technical solution of the present invention, when mixed raw materials are fed into vibrating plate 71, coarse screen 76 first performs a preliminary screening of the mixed raw materials, filtering out fine dust and impurities.

[0030] Furthermore, the feed pipe 5 is also fixedly connected to the primary screening bin 10, and a primary screening blade 11 is installed in the primary screening bin 10, and the output end also extends into the primary screening bin 10. The height difference between the output end and the input end is greater than zero. Using the technical solution of the present invention, when the mixed raw material is fed into the primary screening bin 10 through the vibrating plate 71, on the one hand, the rotation of the primary screening blade 11 causes the mixed raw material to continuously roll, and on the other hand, the heavier tobacco stems in the mixed raw material fall out from the lower end of the primary screening bin 10, while the lighter tobacco shreds and part of the tobacco stems in the mixed raw material are fed into the screening cylinder 1 along the feed pipe 5 for further screening. Therefore, the primary screening bin 10 and the primary screening blades 11 can complete the preliminary screening of the mixed raw material.

[0031] In addition, the discharge pipe 6 is also connected to the dust collector 12. In order to remove the dust or tar and other impurities remaining in the tobacco and obtain purer tobacco, the number of the screening cylinders 1 is preferably three.

Claims

1. A tobacco stem and shredded tobacco grading and screening device, characterized by: The invention comprises a plurality of screening cylinders (1) and a plurality of ash discharge valves (2), wherein the ash discharge valves (2) include an ash discharge bin (21), wherein a discharge blade is installed in the ash discharge bin (21), wherein the upper end of the screening cylinder (1) is connected to a first negative pressure fan (3), and the lower end of the screening cylinder (1) is connected to the ash discharge bin (21), and two adjacent screening cylinders (1) are connected via a feed pipe (4), wherein the first screening cylinder (1) is also connected to a feed pipe (5), and the last screening cylinder (1) is also connected to a discharge pipe (6); The tobacco stem and shredded tobacco grading and screening equipment also includes a feeding device (7) and a plurality of collecting boxes. The feeding device (7) includes a vibrating plate (71), one side of the vibrating plate (71) is used as an input end, and the other side of the vibrating plate (71) is used as an output end. The output end is connected to the feeding pipe (5). The collecting box is placed below the ash unloading bin (21). The upper end of each collecting box is also connected to the second negative pressure fan (8). Each collecting box is also connected to one end of the return pipe (9). The other end of the return pipe (9) is connected to the input end. The surface of the vibrating plate (71) is also provided with a plurality of screening grooves running through its left and right sides. The feeding pipe (5) is also fixedly connected to the primary screening bin (10). The primary screening blades (11) are installed in the primary screening bin (10). The output end also extends into the primary screening bin (10).

2. The tobacco stem and shredded tobacco grading and screening device according to claim 1, characterized in that: The feeding device (7) further comprises a driving motor (72), a driving wheel (73), a support rod (74) and a slider (75); the vibrating plate (71) is fixedly connected to the slider (75); one end of the support rod (74) is hinged to the slider (75); the other end of the support rod (74) is hinged to the driving wheel (73) via an axle pin; the driving wheel (73) is also coaxially fixedly connected to the output shaft of the driving motor (72); and the axial spacing between the axle pin and the output shaft of the driving motor (72) is greater than zero.

3. The tobacco stem and shredded tobacco grading and screening device according to claim 1, characterized in that: The feeding device (7) further comprises a coarse screen (76), one end of the coarse screen (76) is fixedly connected to the input end, and the other end of the coarse screen (76) extends outward.

4. The tobacco stem and shredded tobacco grading and screening device according to claim 3, characterized in that: The feeding device (7) further comprises a feed hopper (77), the lower end of which is aligned with the coarse screen (76).

5. The tobacco stem and shredded tobacco grading and screening device according to claim 1, characterized in that: The height difference between the output end and the input end is greater than zero.

6. The tobacco stem and shredded tobacco grading and screening device according to claim 1, characterized in that: The discharge pipe (6) is also connected to a dust collector (12).

7. The tobacco stem and shredded tobacco grading and screening device according to claim 1, characterized in that: The number of the screening cylinders (1) is 3.

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