A three-stage air separation device

Abstract

The application belongs to the technical field of tobacco processing, and discloses a three-stage air separation device, which comprises a first air separation box, a second air separation box, a third air separation box and a main conveying belt. The mixture passes through the first air separation box, the second air separation box and the third air separation box in sequence. A first loosening roller disperses the mixture, and the first loosening roller divides the volume of dry tobacco cut. The dry tobacco cut is sent by the second air separation box to an air pipe. A second conveying belt inputs the dry tobacco cut into a second loosening member. The second loosening member disperses the dry tobacco cut to form dry tobacco. The second conveying belt conveys the dry tobacco to the third air separation box. The third air separation box discharges stems and leaves and sends the dry tobacco to the main conveying belt. The application solves the problem that, in the prior art, after the tobacco cut is subjected to two-stage air separation, some wet tobacco cut is mixed into the main tobacco cut in the processing procedure, thereby reducing the quality of the cigarette.

Description

TECHNICAL FIELD

[0001] The present application relates to the tobacco processing technical field, and particularly relates to a three-stage winnowing device. BACKGROUND

[0002] When processing tobacco, because coarse stem and fine stem, dry tobacco clusters, wet tobacco clusters and scattered dry tobacco are mixed in the tobacco, the tobacco needs to be winnowed, and the dry tobacco clusters and scattered dry tobacco are transported to the next process to form main tobacco, so as to screen out the stems in the tobacco. A two-stage winnowing system is generally used in the industry, which plays an important role in further improving the purity of tobacco. Through two-stage winnowing, the stem rate in the tobacco is further reduced, and the tobacco becomes more pure.

[0003] However, the disadvantages are obvious. Even through two-stage winnowing, the wet tobacco clusters in the dry tobacco cannot be effectively removed. After the finished cigarettes are produced, the wet tobacco clusters have a certain amount of moisture, which will produce a certain amount of yellow spots on the outer skin of the cigarette, reducing the quality of the cigarette. If only one-stage winnowing is used to process the tobacco, large wet clusters can be removed in the one-stage winnowing, but this will result in a high stem rate in the tobacco and also cause the clustered dry tobacco to be unable to enter the next production line, resulting in waste of tobacco. After two-stage winnowing, before the tobacco enters the two-stage winnowing box, a cluster breaking mechanism is needed to loosen the clustered tobacco. After the clustered dry tobacco is broken, more dry tobacco can be collected by the two-stage winnowing. However, under the action of the cluster breaking mechanism, the wet tobacco clusters will also be broken and mixed with the dry tobacco in large quantities. Because the two are intertwined with each other, the dry tobacco cannot be sucked away by the two-stage winnowing box, and the dry tobacco sucked away also contains wet tobacco, so although the removal rate of the stems is improved, the probability of the wet tobacco clusters mixing with the main tobacco and entering the next process is increased, reducing the quality of the cigarette. SUMMARY

[0004] The present application aims to provide a three-stage winnowing device, which solves the problem that after the tobacco is winnowed by two stages, part of the wet tobacco clusters will mix with the main tobacco in the processing process, reducing the quality of the cigarette.

[0005] To achieve the above object, the present application adopts the following technical scheme: the present application provides a three-stage air separation device, which comprises a first air separation box, a second air separation box, a third air separation box and a main conveying belt, a mixture passes through the first air separation box, the second air separation box and the third air separation box in sequence, the mixture comprises dry tobacco shreds, dry tobacco shred groups, wet tobacco shred groups and stems, the first air separation box sucks part of the dry tobacco shreds onto the main conveying belt, a first conveying belt is installed between the first air separation box and the second air separation box, the first conveying belt transports the mixture falling from the first air separation box, the first conveying belt is conveyed into the second air separation box, a first loosening roller is installed at the bottom of the second air separation box, the first loosening roller divides the volume of the dry tobacco shred groups, the dry tobacco shred groups and the dry tobacco shreds are air-sent into an air pipe by the second air separation box, a second conveying belt is installed at the lower side of the air pipe, the second conveying belt inputs the dry tobacco shred groups into a second loosening member, the second loosening member scatters the dry tobacco shred groups to form dry tobacco shreds, a second conveying belt is installed at the lower side of the second loosening member, the second conveying belt conveys the dry tobacco shreds into the third air separation box, the third air separation box air-sends the dry tobacco shreds into the main conveying belt;

[0006] The second loosening member comprises a first combing roller and a second combing roller, tapered nails are distributed on the outer walls of the first combing roller, the second combing roller and the first loosening roller at equal intervals, the density of the tapered nails of the first combing roller and the second combing roller is greater than the density of the tapered nails of the first loosening roller, the first combing roller and the second combing roller rotate in opposite directions and the tapered nails of the first combing roller and the second combing roller are staggered with each other, the suction force of the second air separation box is less than the weight of the wet tobacco shred groups in the second air separation box, and the suction force of the third air separation box is less than the weight of the stems in the third air separation box.

[0007] As preferably, a first vibrating groove is installed at the end of the first conveying belt, the other end of the first vibrating groove is connected with the second air separation box, the first vibrating groove thins the mixture by vibration, a first conveying belt is installed on the first vibrating groove, and the first conveying belt inputs the mixture into the second air separation box.

[0008] As preferably, a first throwing roller is installed at the middle section of the second air separation box, and the first throwing roller throws the mixture into the second air separation box.

[0009] As preferably, a first vibrating screen is installed at the bottom of the second air separation box in an inclined manner, an opening is installed on the side wall of the second air separation box close to the lower side of the first vibrating screen, a recovery box is installed on the opening, the first vibrating screen discharges the stems and the wet tobacco shred groups into the recovery box, and the first loosening roller is installed at the bottom of the second air separation box away from the first throwing roller.

[0010] As preferably, the second conveying belt lower side is provided with a second vibration groove, and the second vibration groove is provided with a second conveying belt, and the second conveying belt conveys the dry cut tobacco into the third air separating box.

[0011] As preferably, the third air separating box middle section side wall is provided with a second throwing roller, and the second throwing roller throws the dry cut tobacco from the second conveying belt into the third air separating box.

[0012] As preferably, the third air separating box bottom is provided with a second vibration sieve, and the third air separating box side wall is provided with an outlet, and the outlet is arranged at the lower side of the second vibration sieve, and the stem is discharged from the outlet.

[0013] As preferably, the air pipe end is provided with a first air lock, and the first air lock recycles the dry cut tobacco and the dry cut tobacco, and the second conveying belt upper side is provided with the first air lock, and the dry cut tobacco, the wet cut tobacco and the dry cut tobacco fall on the second conveying belt.

[0014] As preferably, the third air separating box upper side is communicated with a recycling pipe, and the recycling pipe is provided with a second air lock, and the second air lock recycles the dry cut tobacco, and the second air lock lower side is provided with a recycling opening, and the main conveying belt is arranged at the lower side of the recycling opening.

[0015] Beneficial effects: through the arrangement of the first air separating box, the second air separating box and the third air separating box, first, a large amount of dry cut tobacco is screened through the first air separating box, then, because the density of the conical nails of the first combing roller and the second combing roller is greater than that of the first loose roller, the first loose roller can only divide the dry cut tobacco to make the volume smaller, so as to be absorbed into the third air separating box by the second air separating box, the wet cut tobacco falls directly to the bottom of the second air separating box because of the heavy weight, and the wet cut tobacco cannot enter the third air separating box because the suction force of the air separation in the second air separating box cannot suck the wet cut tobacco in the second air separating box, then, a small amount of stems and small volume dry cut tobacco and dry cut tobacco are scattered again by the second loose member, and become dry cut tobacco, so that the dry cut tobacco is directly sucked and conveyed to the main conveying belt by the third air separating box, so that the screened tobacco is more pure, and the content of stems is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is the second air separating box and the third air separating box of the application;

[0017] Fig. 2 is the first air separating box of the application;

[0018] Fig. 3 is the second loose member of the application;

[0019] Fig. 4 is a partial structure diagram of the second winnowing box of the present application.

[0020] In the figure: 1, first winnowing box; 2, second winnowing box; 3, third winnowing box; 4, main conveying belt; 5, first conveying belt; 6, first loosening roller; 7, air pipe; 8, second conveying belt; 9, second loosening member; 91, first carding roller; 92, second carding roller; 10, conical nail; 11, first vibrating trough; 12, first throwing roller; 13, first vibrating screen; 14, recycling box; 15, second vibrating trough; 16, second throwing roller; 17, second vibrating screen; 18, first air lock; 19, second air lock; 20, arc-shaped groove. DETAILED DESCRIPTION

[0021] The present application will be further described below in conjunction with the accompanying drawings and examples. It should be understood that the specific examples described herein are intended to be merely illustrative of the present application and not in limitation thereof. It should also be noted that, for the purpose of description, only the parts related to the present application are shown in the drawings rather than all the parts.

[0022] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "lower", "lower" and "lower" of the first feature to the second feature include the vertical direction of the first feature below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0024] In the description of the present application, the terms "upper", "lower", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0025] In the current technology, in order to screen out more tobacco shreds and reduce losses, the mixture is broken up. During the breaking up process, the wet tobacco shreds are also broken up, and the wet and dry tobacco shreds enter the next production process at the same time, resulting in a decrease in the quality of the tobacco shreds. At the same time, because the wet tobacco shreds are larger, they press the dry tobacco shreds to the bottom, preventing the secondary air separator from sucking the tobacco shreds upward by air separation, which further causes the loss of tobacco shreds.

[0026] To solve the above problems, such as Figs. 1 to 4 As shown, the present invention provides a three-stage air separation device, including a first air separation box 1, a second air separation box 2, a third air separation box 3, and a main conveyor belt 4. A mixture passes sequentially through the first air separation box 1, the second air separation box 2, and the third air separation box 3. The mixture includes dry tobacco shreds, dry tobacco clumps, wet tobacco clumps, and tobacco stems. The first air separation box 1 conveys a portion of the dry tobacco shreds onto the main conveyor belt 4. A first conveyor belt 5 is installed between the first air separation box 1 and the second air separation box 2. The first conveyor belt 5 transports the mixture that falls from the first air separation box 1. The dry tobacco shreds are fed into the second air separation box 2. A first loosening roller 6 is installed at the bottom of the second air separation box 2. The first loosening roller 6 divides the dry tobacco shreds into clumps. The dry tobacco shreds and tobacco shreds are then conveyed by air from the second air separation box 2 into the air duct 7. A second conveyor belt 8 is installed on the lower side of the air duct 7. The second conveyor belt 8 feeds the dry tobacco shreds into the second loosening component 9. The second loosening component 9 breaks up the dry tobacco shreds into dry tobacco shreds. A second conveyor belt 8 is installed on the lower side of the second loosening component 9. The second conveyor belt 8 transports the dry tobacco shreds into the third air separation box 3. The third air separation box 3 then conveys the dry tobacco shreds into the main conveyor belt 4.

[0027] The second loosening component 9 includes a first combing roller 91 and a second combing roller 92. Conical nails 10 are evenly distributed on the outer walls of the first combing roller 91, the second combing roller 92 and the first loosening roller 6. The density of conical nails 10 in the first combing roller 91 and the second combing roller 92 is greater than the density of conical nails 10 in the first loosening roller 6. The first combing roller 91 and the second combing roller 92 rotate in opposite directions and the conical nails 10 are interlaced. The suction force of the second air classifier 2 is less than the weight of the wet tobacco clump in the second air classifier 2. The suction force of the third air classifier 3 is less than the weight of the stems in the third air classifier 3.

[0028] It should be noted that the stems are divided into coarse stems and fine stems. The coarse and fine stems can be discharged from the second air separation box, while a small number of fine stems can be screened out from the bottom of the third air separation box.

[0029] The second loose component 9 adopted by the present application is a loose component in the prior art. The dry tobacco bunches fall on the first combing roller 91 through the engagement of the first combing roller 91 and the second combing roller 92. The second combing roller 92 rotates at a higher speed to strip the tobacco bunches on the first combing roller 91, and all the tobacco bunches on the first combing roller 91 are separated directly. The density of the conical nails 10 is the lowest, and the tobacco bunches after being scattered still have some tobacco bunches.

[0030] It needs to be particularly pointed out that, since the wet tobacco bunches have a certain amount of moisture, the weight of the wet tobacco per unit volume is much higher than that of the dry tobacco. The wet tobacco bunches fall directly to the bottom after entering the second air separation box 2, and are separated from the dry tobacco bunches. The dry tobacco bunches can fly a long distance under the action of the first throwing roller 12. In addition, the working principle of the air separation box is the prior art. Different weights of target objects are selected by the size of the air force. The objects with a larger air force fall, and the objects with a smaller air force rise. The principle will not be described here.

[0031] Firstly, the mixture will first pass through the first air separation box 1. The structure principle of the first air separation box 1 is similar to the prior art, which will not be described here. The main purpose is to air separate the dry tobacco with the highest content in the mixture, and air send the dry tobacco to the main conveying belt 4. Then the mixture left after that is transported to the direction of the second air separation box 2 by the first conveying belt 5, and is transported into the second air separation box 2. After entering the second air separation box 2, the first loosening roller 6 is installed at the bottom of the second air separation box 2 and is located away from the first throwing roller 12. The wet tobacco bunches and the thick stem and a large number of fine stems will directly fall to the bottom of the second air separation box 2. Then the dry tobacco bunches will fall into the first loosening roller 6. Since the arc-shaped groove 20 is formed in the first loosening roller 6, the dry tobacco bunches are continuously stirred and cut in the arc-shaped groove 20. The density of the conical nails 10 on the first loosening roller 6 is low, so the dry tobacco bunches will be divided into small parts and will not be scattered. Then, since the second air separation box 2 can only absorb the dry tobacco bunches, the wet tobacco bunches with a heavier weight cannot be recycled. In this way, the wet tobacco bunches can be separated from the mixture, so that the wet tobacco bunches in the mixture cannot enter the third air separation box 3, improving the quality of the tobacco after screening. The tobacco is completely scattered into dry tobacco and a small amount of fine stem mixture by the first combing roller 91 and the second combing roller 92. By adjusting the air door of the third air separation box 3, the dry tobacco with a lighter weight can be recycled, and the finer stems are left in the third air separation box 3. Since the proportion of the stems is low, the dry tobacco stems in the third air separation box 3 will not entangle with each other. Through the three-stage air separation, the stems are removed, so that as much dry tobacco as possible can be recycled to the main conveying belt 4.

[0032] The first end of the first conveying belt 5 is provided with a first vibrating groove 11, the other end of the first vibrating groove 11 is communicated with the second winnowing box 2, the first vibrating groove 11 can thin the mixture by vibrating, so that the mixture is prevented from being agglomerated, and the first throwing roller 12 can uniformly throw the mixture into the second winnowing box 2, so that the winnowing efficiency is higher, and the first conveying belt is installed on the first vibrating groove 11, and the first conveying belt can send the mixture into the second winnowing box 2.

[0033] The middle section of the second winnowing box 2 is provided with the first throwing roller 12, the first throwing roller 12 throws the mixture into the second winnowing box 2, the wet tobacco column and the stem are close in flight distance due to the heavy weight, and the dry tobacco column flies far and falls into the arc-shaped groove 20, and the first loosening roller 6 can continuously stir and scatter the mixture into the second winnowing box 2, so that the winnowing efficiency is higher, and the stem, the wet tobacco column and the impurities can quickly fall.

[0034] The bottom of the second winnowing box 2 is provided with the first vibrating screen 13, the side wall of the second winnowing box 2 is provided with an opening near the lower side of the first vibrating screen 13, the opening is provided with the recovery box 14, the first vibrating screen 13 can discharge the stem and the wet tobacco column into the recovery box 14, the dry tobacco and the dry tobacco column in the mixture falling down can be continuously stirred by the second vibrating screen 17, so that the dry tobacco can be sucked into the air pipe 7 by the second winnowing box 2, the wet tobacco column, the thick stem and a large amount of thin stem will slide out of the second vibrating screen 17 into the recovery box 14 due to the heavy weight, and the first loosening roller 6 is installed on the bottom of the second winnowing box 2 away from the first throwing roller 12, so as to receive the dry tobacco column.

[0035] The lower side of the second conveying belt 8 is provided with the second vibrating groove 15, the second vibrating groove 15 is provided with the second conveying belt, and the second conveying belt can convey the dry tobacco into the third winnowing box 3.

[0036] The second conveying belt 8 is provided with the dry tobacco column, the dry tobacco and a small amount of thin stem, the dry tobacco can be thinned by the second vibrating groove 15, so that the agglomeration is avoided, and the winnowing effect is better.

[0037] The middle section of the third winnowing box 3 is provided with the second throwing roller 16, the second throwing roller 16 can throw the dry tobacco and the thin stem from the second conveying belt 8 into the third winnowing box 3, so that the winnowing effect is better, the stem directly falls into the bottom of the third winnowing box 3, and the dry tobacco is winnowed onto the main conveying belt 4.

[0038] The bottom of the third winnowing box 3 is provided with the second vibrating screen 17, the side wall of the third winnowing box 3 is provided with the discharge port, the discharge port is arranged on the lower side of the second vibrating screen 17, and the stem is discharged from the discharge port.

[0039] The small part of stem sign is stirred by the second sieve 17, and the dry tobacco in the stem sign is sent out by the third air selection box 3, so that the dry tobacco can be fully sucked out by the third air selection box 3.

[0040] The first air lock 18 is installed at the end of the air pipe 7, the dry tobacco group, the wet tobacco group and the dry tobacco are recycled by the first air lock 18, the first air lock 18 is installed on the upper side of the second conveying belt 8, the dry tobacco group, the wet tobacco group and the dry tobacco fall on the second conveying belt 8, the third air selection box 3 is communicated with a recycling pipe, the second air lock 19 is arranged on the recycling pipe, the dry tobacco is recycled by the second air lock 19, the recycling pipe is provided with the recycling pipe, the main conveying belt 4 is arranged on the lower side of the recycling pipe.

[0041] The mixture in the air flow can be captured by the first air lock 18 and the second air lock 19, so that the mixture can smoothly enter the next stage air selection box or the main conveying belt 4. In addition, the second conveying belt 8 can be moved, if it is needed to be two-stage air selection, the main conveying belt 4 is arranged on the lower side of the second conveying belt 8, the three-stage air selection device of the application can be flexibly switched, when it is needed to be two-stage air selection device, different tobacco production lines can be used.

[0042] Obviously, the above embodiments of the application are only examples for clearly illustrating the application, and are not intended to limit the implementation modes of the application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the application. Here, all the implementation modes do not need to be exhausted, and it is not necessary and impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement made in the spirit and principle of the application should be included in the protection scope of the claims of the application.

Claims

1. A three-stage air separation device, characterized in that, The system includes a first air separator (1), a second air separator (2), a third air separator (3), and a main conveyor belt (4). The mixture passes sequentially through the first air separator (1), the second air separator (2), and the third air separator (3). The mixture includes dry tobacco shreds, dry tobacco clumps, wet tobacco clumps, and stems. The first air separator (1) blows a portion of the dry tobacco shreds onto the main conveyor belt (4). A first conveyor belt (5) is installed between the first air separator (1) and the second air separator (2). The first conveyor belt (5) transports the mixture that falls from the first air separator (1) to the second air separator (2). A first loosening roller (6) is installed at the bottom of the sorting box (2). The first loosening roller (6) divides the dry tobacco clump. The dry tobacco clump and the dry tobacco are blown into the air duct (7) by the second air sorting box (2). A second conveyor belt (8) is installed on the lower side of the air duct (7). The second conveyor belt (8) feeds the dry tobacco clump into the second loosening component (9). The second loosening component (9) breaks up the dry tobacco clump to form dry tobacco. A second conveyor belt (8) is installed on the lower side of the second loosening component (9). The second conveyor belt (8) transports the dry tobacco to the third air sorting box (3). The third air sorting box (3) sucks the dry tobacco into the main conveyor belt (4). The second loosening component (9) includes a first combing roller (91) and a second combing roller (92). Conical nails (10) are evenly distributed on the outer walls of the first combing roller (91), the second combing roller (92) and the first loosening roller (6). The density of conical nails (10) of the first combing roller (91) and the second combing roller (92) is greater than the density of conical nails (10) of the first loosening roller (6). The first combing roller (91) and the second combing roller (92) rotate in opposite directions and the conical nails (10) are interlaced. The suction force of the second air separator (2) is less than the weight of the wet tobacco clump in the second air separator (2). The suction force of the third air separator (3) is less than the weight of the stem in the third air separator (3). The second air classifier (2) is equipped with a first throwing roller (12) in the middle section. The first throwing roller (12) throws the mixture into the second air classifier (2). The wet tobacco clumps and the stems fall directly to the bottom of the second air classifier (2) due to their heavier weight and shorter flight distance. The dry tobacco clumps fall into the arc-shaped groove (20) after flying a longer distance and are stirred and divided into small parts by the first loosening roller (6) without being broken up.

2. The three-stage air separation device according to claim 1, characterized in that, The first conveyor belt (5) is equipped with a first vibration groove (11) at its end. The other end of the first vibration groove (11) is connected to the second air separator (2). The first vibration groove (11) spreads the mixture thinly by vibration. A first conveyor belt is installed on the first vibration groove (11). The first conveyor belt sends the mixture into the second air separator (2).

3. The three-stage air separation device according to claim 1, characterized in that, The bottom of the second air classifier (2) is inclined to install a first vibrating screen (13). An opening is installed on the side wall of the second air classifier (2) near the lower side of the first vibrating screen (13). A recycling box (14) is installed on the opening. The first vibrating screen (13) discharges the stems and the wet tobacco clumps into the recycling box (14). The first loosening roller (6) is installed at the bottom of the second air classifier (2) on the side away from the first throwing roller (12).

4. The three-stage air separation device according to claim 1, characterized in that, A second vibration groove (15) is installed on the lower side of the second conveyor belt (8), and a second conveyor belt is provided on the second vibration groove (15). The second conveyor belt transports the dry tobacco to the third air separator (3).

5. The three-stage air separation device according to claim 1, characterized in that, A second throwing roller (16) is installed on the middle side wall of the third air separator (3). The second throwing roller (16) throws dry tobacco shreds from the second conveyor belt (8) into the third air separator (3).

6. The three-stage air separation device according to claim 1, characterized in that, The bottom of the third air separator (3) is inclined to install a second vibrating screen (17). The side wall of the third air separator (3) is provided with an outlet. The outlet is located on the lower side of the second vibrating screen (17). The stem is discharged from the outlet.

7. The three-stage air separation device according to claim 1, characterized in that, A first airlock (18) is installed at the end of the air duct (7). The first airlock (18) recovers the dry tobacco clump and the dry tobacco. The first airlock (18) is installed on the upper side of the second conveyor belt (8). The dry tobacco clump and the dry tobacco fall onto the second conveyor belt (8).

8. The three-stage air separation device according to claim 1, characterized in that, The upper side of the third air separator (3) is connected to a recovery pipe, and a second air lock (19) is provided on the recovery pipe. The second air lock (19) recovers the dry tobacco. A recovery port is provided on the lower side of the second air lock (19), and the main conveyor belt (4) is located on the lower side of the recovery port.

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