Tobacco shred and tobacco stem separating device

Abstract

The utility model relates to the technical field of cut tobacco stem removal, in particular to a cut tobacco and tobacco stem separating device which comprises a device body, a centrifugal rotating disc is arranged in an inner cavity of the device body, the section cutting plane of the centrifugal rotating disc is in a U shape, and a first cut tobacco discharging port is formed in the bottom of the centrifugal rotating disc. A tobacco shred feeding port is formed above the lower area of the centrifugal rotating disc and deviates from the first tobacco shred discharging port, so that tobacco shreds are prevented from directly falling into the first tobacco shred discharging port from the tobacco shred feeding port and the tobacco shred discharging port, and the tobacco shreds are promoted to fall onto the inner wall of the lower portion of the centrifugal rotating disc. Air blowing openings are formed in the upper portion of the upper portion area of the centrifugal rotating disc and arranged in a circle, and tobacco shreds thrown above the upper portion of the centrifugal rotating disc are subjected to wind resistance blowing through the air blowing openings, so that tobacco stems and the tobacco shreds are separated in a coordinated mode. The tobacco shred and tobacco stem separating device has the advantages of good tobacco shred and tobacco stem separating effect, high efficiency and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco shreds and stem removal, in particular to a tobacco shreds and stems separation device. Background Art

[0002] The weight of tobacco stems in tobacco leaves accounts for about 25% of the weight of tobacco leaves. In cigarette production, tobacco stems need to be separated and removed, otherwise it will affect the operation of subsequent cigarette making processes and ultimately affect the quality of cigarettes. At present, in terms of the technology of removing tobacco stems from shredded tobacco, vibration screening is a commonly used physical separation method. Vibration screening uses the vibration of the vibrating screen to make the tobacco shreds and tobacco stems produce different movement trajectories on the screen surface, thereby achieving separation. However, the use of vibrating screens is prone to blockage, which affects production efficiency during unblocking and maintenance operations and reduces production sustainability. At the same time, the separated tobacco stem waste will contain a certain proportion of shredded tobacco, which cannot be recycled and mixed into the raw materials in production, which also causes certain waste. Utility Model Content

[0003] In view of the above shortcomings, the utility model provides a tobacco shred and tobacco stem separation device with good tobacco stem separation effect. To achieve the above purpose, the utility model adopts the following technical solutions:

[0004] A tobacco shred and tobacco stem separation device comprises a device body, the inner cavity of the device body is provided with a centrifugal turntable, the cross-section of the centrifugal turntable is U-shaped, and the bottom of the centrifugal turntable is provided with a first tobacco shred discharge port; a tobacco shred feed port is provided above the lower area of ​​the centrifugal turntable, and the tobacco shred feed port is arranged offset from the first tobacco shred discharge port to prevent the tobacco to be screened from directly falling into the first tobacco shred discharge port from the tobacco shred feed port and the tobacco to be screened is prompted to fall onto the lower inner wall of the centrifugal turntable; an air blowing port is provided above the upper area of ​​the centrifugal turntable, and the air blowing port is arranged in a circle, so that the tobacco to be screened that is thrown above the upper part of the centrifugal turntable is blown by wind resistance, thereby coordinating the separation of tobacco stems and shreds.

[0005] Optionally, the blowing port is configured in a micro-trumpet shape, so as to disperse the airflow blown out from the blowing port. Optionally, a convex ring is provided on the inner wall of the upper portion of the centrifugal turntable, and the area above the convex ring and the area below the blowing port constitute a W zone, and the shredded tobacco to be screened is thrown toward the periphery by centrifugation and the action of the convex ring, and is acted on by the reverse airflow blown out from the blowing port in the W zone, so that the shredded tobacco and stems are further separated.

[0006] Optionally, an air vent is provided on the upper side of the convex ring.

[0007] Optionally, a second centrifugal turntable is further arranged on the top of the centrifugal turntable. The second centrifugal turntable is annular in top view, and the lower part of the second centrifugal turntable is connected to the top of the centrifugal turntable through a connecting arm.

[0008] Optionally, the inclination of the second centrifugal turntable is greater than the inclination of the first centrifugal turntable.

[0009] Optionally, a feed hopper is disposed above the centrifugal turntable, the tobacco feed port is disposed below the feed hopper, and the tobacco feed port is disposed toward the right side of the centrifugal turntable.

[0010] Optionally, an inner retaining ring and an outer retaining ring are arranged below the feed funnel, the inner retaining ring is arranged directly below the centrifugal turntable; the outer retaining ring is arranged directly below the second centrifugal turntable; the inner retaining ring is also provided with an exhaust pipe, and the exhaust pipe is provided with a plurality of exhaust ports; a discharge funnel is arranged below the inner retaining ring and the outer retaining ring.

[0011] Optionally, a discharge chute is provided between the inner side of the shell of the device body and the outer side of the outer retaining ring. The discharge chute is annular in top view and is arranged according to two front and rear arc-shaped slides with the left end higher and the right end lower, so as to facilitate the tobacco stems to slide from the left end to the right end; a tobacco stem discharge port is provided at the right end of the discharge chute.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model adopts a centrifugal method to swing the shredded tobacco to be screened, and then sets a W zone on the upper part of the centrifugal turntable to form a reverse airflow, which further blocks the shredded tobacco while the thinner and heavier stems are continued to be thrown upward, thereby achieving separation, and then the shredded tobacco and the stems are secondary separated by a second centrifugal turntable, thereby achieving a more thorough separation of the shredded tobacco and the stems, with a good effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a top view of the discharge chute of the utility model. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "inside", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figures 1-2 As shown, the tobacco shreds and tobacco stems separation device comprises a device body 1, the inner cavity of the device body is provided with a centrifugal turntable 10, the cross-sectional surface of the centrifugal turntable 10 is U-shaped, and the bottom of the centrifugal turntable 10 is provided with a first tobacco discharge port 17; a tobacco feed port 11 is provided above the lower area of ​​the centrifugal turntable 10, and the tobacco feed port 11 is arranged offset from the first tobacco discharge port 17 to prevent the tobacco to be screened from falling directly into the first tobacco discharge port 17 from the tobacco feed port and discharge port and to promote the tobacco to be screened to fall onto the lower inner wall of the centrifugal turntable 10 so as to be thrown upward by centrifugation. In this embodiment, a feed funnel 6 is provided above the centrifugal turntable 10, and the tobacco feed port 11 is provided at the lower part of the feed funnel 6, and the tobacco feed port 11 is arranged offset to the right side of the centrifugal turntable. The functions of the feed funnel 6 are: (1) to hold the tobacco to be screened; (2) to form a concave centrifugal area below the feed funnel 6 and above the centrifugal turntable 10, which is conducive to cooperating with the blowing port 29 to form an effective screening airflow, that is, to play the function of the W zone. In some embodiments, the inner wall of the centrifugal turntable 10 can be evenly provided with small convex strips or a friction surface to increase the swinging effect of the tobacco to be screened; an annular air supply duct 7 is provided above the upper area of ​​the centrifugal turntable 10, and the lower side of the air supply duct 7 is evenly provided with blowing ports 29, that is, the blowing ports 29 are arranged in a circle, and the tobacco to be screened that is thrown above the upper part of the centrifugal turntable 10 is blown by the blowing ports 29 to assist in the separation of tobacco stems and tobacco. In this embodiment, the blowing port 29 is arranged in a micro-trumpet shape, which promotes the dispersed airflow blown out from the blowing port (such as Figure 1 left arrow in the middle).

[0021] Optionally, the inner wall of the upper portion of the centrifugal turntable 10 is provided with a circle of convex rings 9, and the area above the convex ring 9 and the area below the blowing port 29 constitute a W zone (such as Figure 1 The black dot area on the right side of the middle, namely the W area, is an annular area, and only the airflow arrow is marked on the left side. The shredded tobacco to be screened is thrown outward by centrifugation and the action of the convex ring 9, and is further separated from the shredded tobacco stems by the reverse airflow blown from the blowing port 29 in the W area. The purpose of this design is to increase the air resistance, so that relatively soft and long shredded tobacco is intercepted, while harder and heavier stems are thrown out, thereby reducing the proportion of shredded tobacco in the thrown out mixture.

[0022] Optionally, an air vent 8 is provided on the upper side of the convex ring 9. The purpose of this design is to take into account the air circulation in the turntable system and reduce the air resistance effect at the lower part of the centrifugal turntable 10 (because in this embodiment, a concave centrifugal channel area is formed below the feed funnel 6 and above the centrifugal turntable 10).

[0023] Optionally, a second centrifugal turntable 3 is also provided on the top of the centrifugal turntable 10. The second centrifugal turntable 3 is annular in top view, and its lower part is connected to the top of the centrifugal turntable 10 through a plurality of connecting arms 27. Its function is to rotate with the centrifugal turntable 10 and perform secondary centrifugal screening on the mixture thrown out by the centrifugal turntable 10. Part of the tobacco shreds in the mixture slide down from the lower part of the second centrifugal turntable 3, while most of the tobacco stems are thrown out from the top of the second centrifugal turntable 3.

[0024] Optionally, in some embodiments, the inclination of the second centrifugal turntable 3 is greater than the inclination of the centrifugal turntable 10 .

[0025] Optionally, in the present embodiment, an inner retaining ring 14 and an outer retaining ring 13 are provided below the feed funnel 6, and the inner retaining ring 14 is provided directly below the centrifugal turntable 10; in the present embodiment, considering the reflux and controllability of the airflow, an exhaust pipe 25 is also provided on the inner side of the inner retaining ring 14, and a plurality of exhaust ports are provided on the exhaust pipe 25. The purpose of such a setting is that the air outlet 29 is connected to the remaining air source through the air inlet pipe 4, and the exhaust pipe 25 crosses the outside of the device body 1 through a return air pipe (not shown) to realize the circulation of the airflow. The beneficial effect of this is that when the equipment is running, the reverse airflow velocity in the W zone can be controlled by adjusting the air pressure flow rate of the air inlet pipe 4 and / or the reflux flow rate of the exhaust pipe 25, thereby controlling the air resistance, and the controllable adjustment is carried out by checking the screening effect of the tobacco discharge on the tobacco stems, thereby improving the screening quality. At the same time, in actual operation, it is also necessary to consider the motor transmission. In this embodiment, the lower part of the centrifugal turntable 10 is supported by a bracket 20 and connected and fixed by a rolling bearing 15. In some embodiments, the rotation of the centrifugal turntable 10 can be driven by a motor directly, or as in this embodiment, the motor 24 adopts an external solution, and then a belt is used to drive the pulley 15 at the lower part of the centrifugal turntable 10, and a belt cover 28 can also be added. In this embodiment, the motor 24 is preferably a variable frequency motor. When in use, the centrifugal force is controlled by adjusting the speed (the production parameters are adjusted by checking the screening effect). For example, the motor rotates according to a determined speed parameter, and after the motor 24 rotates, the shredded tobacco to be screened is added to the feed hopper 6, such as 30kg of feed screening in this batch; the feeding method is because in this embodiment, the upper part of the feed hopper 6 is open, so it can be directly fed with a feeder or some shredded tobacco to be screened that is seriously agglomerated can be first broken up. The machine breaks up the tobacco and conveys it through the air flow conveying pipe 5; at the same time, before feeding, the air pressure flow rate of the air inlet pipe 4 and the reflux flow rate of the exhaust pipe 25 are operated according to the settings, and the shredded tobacco to be screened falls from the shredded tobacco feeding port 11 to the lower part of the rotating centrifugal turntable 10 for centrifugal swinging; when a certain time T is reached (the time T is also determined by preliminary tests, that is, checking the shredded tobacco screening effect), the motor 24 gradually changes to a low speed or even 0, prompting the shredded tobacco trapped on the centrifugal turntable 10 to fall back and fall from the first shredded tobacco discharge port 17. When it is basically dropped, the screening and separation of the second batch of shredded tobacco is started again, and the above steps are repeated.

[0026] The outer retaining ring 13 is arranged directly below the second centrifugal turntable 3, and its function is to collect the tobacco shreds dropped from the lower part of the second centrifugal turntable 3; the inner retaining ring 14 and the lower part of the outer retaining ring 13 are provided with a discharge funnel 21. In this embodiment, the inner retaining ring 14 is connected to the outer retaining ring 13 through a support arm 22, and then the lower part of the outer retaining ring 13 is placed on the discharge funnel 21, and the discharge funnel 21 is placed on the support frame 19 of the device body. The discharge funnel 21 is used to collect the tobacco shreds dropped from the first tobacco discharge port 17 and the tobacco shreds dropped from the lower part of the second centrifugal turntable 3; and discharge from the total discharge port 18 at the lower part of the discharge funnel 21.

[0027] Optionally, a discharge trough 26 is provided between the inner side of the housing 2 of the device body and the outer side of the outer retaining ring 3, and the discharge trough 26 is used to collect the tobacco stems thrown out from the second centrifugal turntable 3. Figure 2 As shown, the top view of the discharge chute 26 is annular, and is arranged according to two front and rear arc-shaped slides with the left end higher and the right end lower, so that the tobacco stems can slide from the left end to the right end; a tobacco stem discharge port 12 is provided at the right end of the discharge chute 26 to facilitate the collection of the tobacco stems.

[0028] A method for separating shredded tobacco from stems is provided, and separation is performed using the shredded tobacco and stem separation device as described above, comprising: firstly centrifuging the shredded tobacco to be screened, and then using a reverse airflow in the opposite direction of the movement direction of the shredded tobacco to be screened on the upper part of the centrifugal turntable to separate the swung shredded tobacco from the wind resistance, and by adjusting the centrifugal speed and the airflow velocity, i.e., the air resistance, the shredded tobacco is retained on the centrifugal turntable while the stems continue to be thrown out; and a second centrifugal turntable is provided to continue to separate the shredded tobacco and the stems.

Claims

1. A tobacco shred and tobacco stem separation device, characterized in that: The device comprises a device body, the inner cavity of which is provided with a centrifugal turntable, the cross-sectional surface of which is U-shaped, and the bottom of which is provided with a first tobacco discharge port; a tobacco feed port is provided above the lower area of ​​the centrifugal turntable, and the tobacco feed port is provided away from the first tobacco discharge port to prevent tobacco from directly falling from the tobacco feed port and discharge port into the first tobacco discharge port and to promote tobacco to fall onto the lower inner wall of the centrifugal turntable; an air blowing port is provided above the upper area of ​​the centrifugal turntable, and the air blowing port is provided in a circle, so that tobacco thrown to the upper part of the centrifugal turntable is blown away by wind resistance through the air blowing port, so as to cooperate in the separation of tobacco stems and tobacco.

2. The tobacco shreds and tobacco stems separation device according to claim 1, characterized in that: The air blowing port is configured in a micro-trumpet shape, so as to disperse the air flow blown out from the air blowing port.

3. The tobacco shreds and tobacco stems separation device according to claim 1, characterized in that: The inner wall of the upper part of the centrifugal turntable is provided with a circle of convex rings, and the area above the convex rings and the area below the blowing port constitute a W zone. The tobacco shreds are thrown toward the periphery by centrifugation and the action of the convex rings, and are affected by the reverse airflow blown out from the blowing port in the W zone, so that the tobacco shreds and stems are further separated.

4. The tobacco shreds and tobacco stems separation device according to claim 3, characterized in that: An air release port is arranged on the upper side of the convex ring.

5. The tobacco shreds and stems separation device according to claim 1, characterized in that: A second centrifugal turntable is also arranged on the top of the centrifugal turntable. The second centrifugal turntable is annular in top view, and the lower part of the second centrifugal turntable is connected to the top of the centrifugal turntable through a connecting arm.

6. The tobacco shreds and tobacco stems separation device according to claim 5, characterized in that: The inclination of the second centrifugal turntable is greater than the inclination of the first centrifugal turntable.

7. The tobacco shreds and tobacco stems separation device according to claim 5, characterized in that: A feed hopper is arranged above the centrifugal turntable, and a tobacco feed port is arranged below the feed hopper. The tobacco feed port is arranged toward the right side of the centrifugal turntable.

8. The tobacco shreds and tobacco stems separation device according to claim 7, characterized in that: An inner retaining ring and an outer retaining ring are arranged below the feed funnel, the inner retaining ring is arranged directly below the centrifugal turntable; the outer retaining ring is arranged directly below the second centrifugal turntable; an exhaust pipe is also arranged on the inner retaining ring, and a plurality of exhaust ports are arranged on the exhaust pipe; a discharge funnel is arranged at the lower part of the inner retaining ring and the outer retaining ring.

9. The tobacco shreds and tobacco stems separation device according to claim 8, characterized in that: A discharge trough is provided between the inner side of the shell of the device body and the outer side of the outer retaining ring. The discharge trough is annular in top view and is arranged according to two front and rear arc-shaped slides with the left end higher and the right end lower, so as to facilitate the tobacco stems to slide from the left end to the right end; a tobacco stem discharge port is provided at the right end of the discharge trough.

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