Tobacco shred stem separating device

Abstract

The utility model discloses a cut tobacco stem separating device which comprises a pressure equalizing chamber, an impurity discharging spiral conveyor, a star-shaped material throwing roller, an airflow material throwing mechanism, a winnowing box, a feeding hopper and a gathering cover. An air outlet is formed in the top of the pressure equalizing chamber; the winnowing box is positioned above the pressure equalizing chamber; the star-shaped material throwing roller is positioned at the air outlet; the airflow throwing mechanism and the feeding hopper are both communicated with a feeding port in the side face of the winnowing box. According to the tobacco shred and stem separating device, airflow is adopted for throwing materials, and light materials (such as tobacco shreds) and heavy materials (such as stem sticks) are thrown into the winnowing box at different throwing speeds and angles. Meanwhile, when the materials are thrown by the air flow, the material throwing direction is upward inclined material throwing, the horizontal moving speed of the materials in the cavity of the winnowing box is low, the horizontal moving distance of the materials in unit time is short, the utilization rate of the winnowing box can be effectively increased, the length of the box can be effectively reduced, and the occupied area of equipment can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tobacco stem and leaf separator, in particular to a device for separating tobacco stems and leaves. BACKGROUND

[0002] The existing method for removing stems and leaves before rolling cigarettes in a tobacco production line is to use air separation to remove stems and leaves in tobacco. The principle is to use a certain air flow to separate stems and leaves according to the physical differences between them. For example, Figure 1 As shown in a tobacco air separator, the main structure is composed of a cross door N1, an outfeed belt conveyor N2, a tobacco combing roller N3, a high-speed throwing belt conveyor N4, a tobacco air separator box N5, and a screen drum N6. The working process is as follows: tobacco is fed into the inlet by a vibrating conveyor and falls onto the conveying belt of the high-speed throwing belt conveyor N4. Due to the high-speed movement of the conveying belt, the tobacco is dispersed, the material layer is thinned, and a tobacco flow is formed. Under the action of inertial force, the tobacco is thrown and dispersed into the tobacco air separator box N5. The screen drum is installed at the upper part of the tobacco air separator box N5 and is connected to a negative pressure suction pipe. Under the action of negative pressure suction, part of the air enters through the inlet and the outlet of the air separator box, forming an upward air flow that makes the qualified tobacco float up. Under the action of the upward floating air flow and its own inertial force, the qualified tobacco drifts towards the front end of the tobacco air separator box N5 (the direction of the outlet). As the distance between the front end of the tobacco air separator box N5 and the inlet and outlet of the air separator box increases, the air flow speed of the upward floating air flow that enters through the inlet and outlet of the air separator box also gradually decreases. When the air separation air flow speed is less than the tobacco floating speed, the tobacco falls down onto the conveying belt of the outfeed belt conveyor N2. The qualified tobacco is conveyed by the outfeed belt conveyor N2 to the cross door and discharged from the outlet. At the same time, the materials with higher floating speed (such as cohesive tobacco, tobacco strands, stems, stem blocks, and heavy impurities) fall onto the tobacco combing roller N3, which is rotating. The tobacco combing roller N3 has staggered nails on its surface, and the materials falling onto the tobacco combing roller N3 are torn by the nails. In this process, the cohesive tobacco and tobacco strands with larger volume are loosened, and part of the tobacco is dispersed into free tobacco. The above-mentioned free tobacco and loosened tobacco strands float upwards into the air separator box under the action of the upward air flow from the inlet and outlet. At the same time, the stems, stem blocks, and heavy impurities with smaller particle size fall through the gaps between the nails on the tobacco combing roller N3 and are discharged from the inlet and outlet, achieving stem separation.

[0003] In summary, the separation of tobacco and stem is completed under the action of upward floating air flow and inertia force of the object itself. Therefore, the regulation and control of material throwing and air separation speed are important. The existing tobacco air separator mostly uses mechanical throwing (such as throwing roller and high-speed throwing belt). When the mechanical throwing is used, the throwing speed of light material (such as tobacco) and heavy material (such as tobacco stem) is basically the same, and even the inertia of heavy material (such as tobacco stem) is greater than that of light material (such as tobacco). In order to fully separate the materials, the air separation box of the tobacco air separator using mechanical throwing generally requires a larger cross-sectional area (length). This makes the existing tobacco air separator have a large floor area and a low material-air ratio (low working efficiency).

[0004] In order to solve the above problems, the utility model provides a kind of tobacco stem separation device. Utility model content

[0005] The utility model aims at solving the problems in the prior art, and provides a tobacco stem separation device, to reduce the floor area of equipment and improve the working efficiency of equipment.

[0006] In order to realize the above invention purposes, the technical scheme of the utility model is as follows:

[0007] The utility model provides a kind of tobacco stem separation device, which comprises a pressure equalizing chamber 1, a foreign matter outlet screw conveyor 2, a star-shaped throwing roller 3, an air flow throwing mechanism 4, an air separation box 5, a feed hopper 6 and a converging cover 7.

[0008] The lower side of the pressure equalizing chamber 1 has a pressure equalizing chamber air inlet 11, and the top of the pressure equalizing chamber 1 has a pressure equalizing chamber air outlet 12.

[0009] The air separation box 5 is located above the pressure equalizing chamber 1, and the bottom of the air separation box 5 is communicated with the pressure equalizing chamber air outlet 12 at the top of the pressure equalizing chamber 1. The positive pressure air in the pressure equalizing chamber 1 enters the air separation box 5 through the pressure equalizing chamber air outlet 12 at the top.

[0010] The star-shaped throwing roller 3 is located at the pressure equalizing chamber air outlet 12 at the top of the pressure equalizing chamber 1.

[0011] The foreign matter outlet screw conveyor 2 is located below the star-shaped throwing roller 3.

[0012] The air separation box 5 has a feed inlet 51 on the side, and the air flow throwing mechanism 4 and the feed hopper 6 are communicated with the feed inlet 51, and the feed hopper 6 is located above the air flow throwing mechanism 4.

[0013] The converging cover 7 is located above the air separation box 5. In the utility model, up and down refer to up and down in the direction of gravity.

[0014] Preferably, the air flow material throwing mechanism 4 is obliquely upwardly installed in the middle of the side of the winnowing box 5, and the air flow material throwing mechanism 4 has an obliquely upwardly installed material throwing plate 41, and the angle between the material throwing plate 41 and the side of the winnowing box 5 is 30-60°. High-speed air flow is used in the air flow material throwing mechanism 4 to throw the material entering from the feeding hopper 6.

[0015] Preferably, a plurality of strip-shaped air outlets are formed in the material throwing plate 41.

[0016] Preferably, the feeding hopper 6 is obliquely downwardly installed in the middle of the side of the winnowing box 5, and the angle between the feeding hopper 6 and the side of the winnowing box 5 is 30-60°.

[0017] Preferably, the winnowing box 5 is a winnowing cavity with a width increasing from top to bottom, and the air flow material throwing mechanism 4 is a boundary surface.

[0018] Preferably, the winnowing box 5 is provided with an adjustable air cavity adjusting plate 52 at the lower part. The winnowing box 5 is provided with the air cavity adjusting plate 52 which can adjust the cross-sectional area (length) of the lower part of the winnowing box 5, so that the cross-sectional area (length) of the lower part of the winnowing box 5 can be adjusted according to the requirement, thereby adjusting the air volume of the positive pressure air from the pressure equalizing chamber.

[0019] Preferably, the pressure equalizing chamber 1 is provided with a first adjusting air door 13, a second adjusting air door 14, a flow guide plate 15 and a micro-porous pressure equalizing plate 16. The entering positive pressure air can be adjusted to ensure the stability of the air flow in the winnowing box and the uniformity of the air speed at each position of the cross section of the winnowing box. The adjusting air door has the first adjusting air door 13 and the second adjusting air door 14, and the specific functions are as follows: the upper and lower deflection angles of the first adjusting air door 13 are adjusted to adjust the air volume of the material throwing plate, thereby controlling the angle and speed of the material entering the winnowing box 5 and improving the separation effect of the light material and the heavy material; the upper and lower deflection angles of the second adjusting air door 14 are adjusted to adjust the air volume of the front and rear micro-porous pressure equalizing plates. The flow guide plate 15 reduces the air field resistance. The micro-porous pressure equalizing plate 16 makes the pressure on the cross section of the pressure equalizing chamber 1 consistent through the damping effect of the micro-pores, thereby ensuring the uniformity and stability of the positive pressure air speed entering the winnowing box 5.

[0020] Preferably, the star-shaped material throwing roller 3 is composed of stacked star-shaped material throwing plates 31 which are spaced apart from each other, and the star-shaped material throwing plates 31 on the two adjacent star-shaped material throwing rollers 3 are arranged in a staggered manner.

[0021] The second aspect of the present application provides a method for separating tobacco shreds and stems, and the method comprises the following steps of using the tobacco shreds and stems separating device of the first aspect of the present application.

[0022] S1, the tobacco stem and leaf material is sent into the feeding hopper 6 by a vibrating conveyor and slides into the air flow throwing mechanism 4, under the action of air flow blowing of the air flow throwing mechanism 4, the tobacco in the tobacco stem and leaf material is scattered into the winnower 5, and the adhered tobacco, strands, stems, stem blocks and heavy impurities slide into the winnower 5;

[0023] S2, the air flow in the winnower 5 is provided by the equalizing chamber 1, under the action of the air flow, the free pure tobacco and light impurities can float upwards, and the adhered tobacco, strands, stems, stem blocks and heavy impurities fall onto the rotating star-shaped throwing roller 3;

[0024] S3, the material falling on the star-shaped throwing roller 3 is hit, shaken and torn by the star-shaped throwing plate, the adhered tobacco and strands are loosened, part of the tobacco is scattered into free tobacco, and the free tobacco floats upwards under the action of the rising air flow;

[0025] S4, the qualified tobacco floating in the cavity of the winnower 5 is collected by negative pressure suction of the converging cover 7 and is conveyed to a material-air separator by a negative pressure suction pipeline, at the same time, the stems, stem blocks and heavy impurities fall through the gaps between the star-shaped throwing plates on the star-shaped throwing roller 3 and are output by the heavy impurity outputting screw conveyor 2, so that the separation of the tobacco and the stems is completed.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] 1, the tobacco stem and leaf separating device adopts air flow throwing, realizes that light material (such as tobacco) and heavy material (such as stem) are scattered into the winnower at different throwing speeds and angles.

[0028] 2, in the tobacco stem and leaf separating device, the lower end of the winnower is connected with the upper end air outlet of the equalizing chamber.

[0029] 3, in the tobacco stem and leaf separating device, the air inlet of the equalizing chamber is connected with the positive pressure air pipe.

[0030] 4. The utility model discloses a tobacco stem and leaf separation device, wherein a star-shaped material throwing roller is installed at the air outlet at the upper end of the pressure equalizing chamber. The star-shaped material throwing roller rotates to loosen the large-volume and adhered tobacco leaves and strands, and the adhered tobacco leaves are dispersed into free tobacco leaves. The free tobacco leaves and the loosened strands float upwards into the winnowing box under the action of the upward airflow at the air outlet. Meanwhile, the small-sized stems, stem blocks and heavy impurities fall through the gaps between the star-shaped material throwing rollers and are discharged by the impurity discharging spiral conveyor, thereby realizing the separation of stems and leaves.

[0031] 5. The utility model discloses a tobacco stem and leaf separation device, wherein the winnowing box 5 is a winnowing cavity with a wide upper part and a narrow lower part. Therefore, as the material gradually floats upwards in the winnowing cavity, the airflow speed at the cross section where the material is located gradually decreases. When the airflow speed decreases to a certain value, only the free tobacco leaves with a low floating speed continue to float upwards, while the strands and the adhered tobacco leaves that have not been separated fall downwards again onto the rotating star-shaped material throwing roller. The strands and the adhered tobacco leaves repeatedly go through the above-mentioned tearing-floating-falling process until the strands and the adhered tobacco leaves are completely dispersed into free tobacco leaves, thereby realizing the deep separation of tobacco leaves and stems. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a schematic diagram of the principle of the prior art tobacco air separator.

[0033] Figure 2 It is a structural schematic diagram of the utility model discloses a tobacco stem and leaf separation device.

[0034] Figure 3 It is a structural schematic diagram of the airflow material throwing mechanism of the utility model discloses a tobacco stem and leaf separation device.

[0035] Figure 4 It is a structural schematic diagram of the star-shaped material throwing roller of the utility model discloses a tobacco stem and leaf separation device (the upper drawing is a structural schematic diagram of a star-shaped material throwing roller, and the lower drawing is a structural schematic diagram of three star-shaped material throwing rollers).

[0036] Figure 5 It is a structural schematic diagram of the star-shaped material throwing plate in the star-shaped material throwing roller of the utility model discloses a tobacco stem and leaf separation device.

[0037] Names of reference signs in the brief description of drawings: N1-cross door, N2-discharging belt conveyor, N3-strand combing roller, N4-high-speed material throwing belt conveyor, N5-tobacco winnowing box, N6-sieve screen cylinder.

[0038] 1 - equalizing chamber, 2 - impurity removal screw conveyor, 3 - star-shaped throwing roller, 4 - air flow throwing mechanism, 5 - winnowing box, 6 - feeding hopper, 7 - converging cover, 11 - equalizing chamber air inlet, 12 - equalizing chamber air outlet, 13 - first regulating damper, 14 - second regulating damper, 15 - guide plate, 16 - microporous equalizing plate, 31 - star-shaped throwing plate, 41 - throwing plate, 42 - air duct, 51 - feeding port, 52 - air cavity regulating plate. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0041] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0042] In the description of the present application, it should be noted that the terms "upper", "lower", "top", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the utility model, still need explaining, unless another explicit provision and limitation, term '' set '', '' install '', '' connect '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can through intermediate medium indirectly connect, can be two element internal intercommunication. For ordinary skilled person in the art, can understand the specific meaning of above-mentioned term in the utility model with specific situation.

[0044] Embodiment

[0045] As Figure 2 shown, the present embodiment provides a tobacco stem and leaf separator, the core of which is an air flow material throwing mechanism. The system is used to throw different materials into the winnowing box at different angles and speeds according to the different characteristics of the materials (such as the difference in floating speed of tobacco and stem).

[0046] Figure 2 As shown in a tobacco stem and leaf separator, which mainly completes the separation of tobacco and impurities (stem blocks, stems, sundries, etc.) in tobacco through the coordinated work of components (system) such as 1. pressure equalization chamber, 2. impurity outlet screw conveyor, 3. star-shaped material throwing roller, 4. air flow material throwing mechanism, 5. winnowing box, 6. feed hopper, 7. converging cover.

[0047] Specifically, the tobacco stem and leaf separator comprises a pressure equalization chamber 1, an impurity outlet screw conveyor 2, a star-shaped material throwing roller 3, an air flow material throwing mechanism 4, a winnowing box 5, a feed hopper 6, and a converging cover 7.

[0048] The pressure equalization chamber 1 has a pressure equalization chamber air inlet 11 on the lower side, and the pressure equalization chamber 1 has a pressure equalization chamber air outlet 12 on the top, and the pressure equalization chamber air inlet 11 is connected with the positive pressure air inlet pipeline;

[0049] The winnowing box 5 is located above the pressure equalization chamber 1, and the bottom of the winnowing box 5 is in communication with the pressure equalization chamber air outlet 12 on the top of the pressure equalization chamber 1, and the positive pressure air in the pressure equalization chamber 1 enters the winnowing box 5 from the pressure equalization chamber air outlet 12 on the top;

[0050] The star-shaped material throwing roller 3 is located at the pressure equalization chamber air outlet 12 on the top of the pressure equalization chamber 1;

[0051] The impurity outlet screw conveyor 2 is located below the star-shaped material throwing roller 3;

[0052] The winnowing box 5 has a feed inlet 51 on the side, the air flow material throwing mechanism 4 and the feed hopper 6 are in communication with the feed inlet 51, and the feed hopper 6 is located above the air flow material throwing mechanism 4;

[0053] The converging cover 7 is located above the winnowing box 5.

[0054] The air flow throwing mechanism 4 is obliquely upwardly installed in the middle of the side of the winnowing box 5, and has an obliquely upwardly installed throwing plate 41, which is 45° with the side of the winnowing box 5. High-speed air flow is used in the air flow throwing mechanism 4 to throw the material entering from the feeding hopper 6.

[0055] The throwing plate 41 is provided with a strip-shaped air outlet.

[0056] The feeding hopper 6 is obliquely downwardly installed in the middle of the side of the winnowing box 5, and is 45° with the side of the winnowing box 5.

[0057] The winnowing box 5 is a winnowing cavity with a width increasing from top to bottom, and the air flow throwing mechanism 4 is a boundary surface.

[0058] The winnowing box 5 is provided with an adjustable air cavity adjusting plate 52 at the lower part. The winnowing box 5 is provided with the air cavity adjusting plate 52, which can adjust the size of the cross section (length) of the lower part of the winnowing box 5, so that the size of the positive pressure air from the pressure equalizing chamber can be adjusted.

[0059] The pressure equalizing chamber 1 is provided with a first adjusting damper 13, a second adjusting damper 14, a flow guide plate 15 and a micro-porous pressure equalizing plate 16. The entering positive pressure air can be adjusted to ensure the stability of the air flow in the winnowing box and the uniformity of the air speed at each part of the cross section of the winnowing box. The adjusting damper has two dampers, i.e. the first adjusting damper 13 and the second adjusting damper 14, which have the following specific functions: the upper and lower deflection angles of the first adjusting damper 13 are adjusted to adjust the throwing air volume at the throwing plate, so as to control the angle and speed of the material entering the winnowing box 5 and improve the separation effect of the light material and the heavy material; the upper and lower deflection angles of the second adjusting damper 14 are adjusted to adjust the air volume of the front and rear micro-porous pressure equalizing plates. The flow guide plate 15 reduces the air field resistance. The micro-porous pressure equalizing plate 16 makes the pressure on the cross section of the pressure equalizing chamber 1 consistent through the damping effect of the micro-pores, so as to ensure the uniformity and stability of the positive pressure air entering the winnowing box 5.

[0060] The star-shaped throwing roller 3 is composed of stacked star-shaped throwing plates 31 which are spaced apart from each other, and the star-shaped throwing plates 31 on the two adjacent star-shaped throwing rollers 3 are arranged alternately.

[0061] The tobacco shred and stem plug separation method uses the tobacco shred and stem plug separation device, which comprises the following steps:

[0062] S1, the tobacco stem and leaf material is sent into the feeding hopper 6 by a vibrating conveyor and slides down into the air flow throwing mechanism 4. Under the action of air flow blowing in the air flow throwing mechanism 4, the tobacco in the tobacco stem and leaf material is scattered into the winnowing box 5, and the adhered tobacco, strands, stems, stem blocks and heavy impurities slide down into the winnowing box 5;

[0063] S2, the air flow in the winnowing box 5 is provided by the pressure equalizing chamber 1. Under the action of the air flow, the free pure tobacco and light impurities can float upwards, and the adhered tobacco, strands, stems, stem blocks and heavy impurities fall onto the rotating star-shaped throwing roller 3;

[0064] S3, the material falling on the star-shaped throwing roller 3 is hit, shaken and torn by the star-shaped throwing plate, the adhered tobacco and strands are loosened, and part of the tobacco is scattered into free tobacco, which floats upwards under the action of the rising air flow,

[0065] S4, the qualified tobacco floating in the cavity of the winnowing box 5 is collected by negative pressure suction of the converging cover 7 and is transported to the material-air separator by the negative pressure suction pipeline, at the same time, the stems, stem blocks and heavy impurities fall through the gaps between the star-shaped throwing plates on the star-shaped throwing roller 3 and are output by the heavy impurity output screw conveyor 2, so that the separation of tobacco and stems is completed.

[0066] In the specific operation process, in this example, the tobacco is sent into the feeding hopper 6 by a vibrating conveyor and slides down onto the throwing plate 41 installed obliquely in the air flow throwing mechanism 4. The throwing plate 41 is provided with a narrow strip-shaped air outlet, the air duct 42 has positive pressure air, the high-speed air flow is blown out from the narrow strip-shaped air outlet and makes the tobacco disperse, and the material layer is thinned to form a tobacco flow. Under the action of high-speed air flow blowing, the free pure tobacco is scattered into the winnowing box 5 at a high speed and an upward angle; the stems, stem blocks and heavy impurities slide down into the winnowing box 5. In this process, due to the differences in characteristics of different materials (such as the floating speed difference between tobacco and stems), the materials are scattered into the winnowing box at different angles and speeds, which is beneficial to the separation of stems and tobacco in the winnowing box and improves the winnowing efficiency of the tobacco stem and leaf separation device. At the same time, during the air flow throwing, the throwing direction is upwardly inclined throwing, the horizontal movement speed of the material in the cavity of the winnowing box 5 is low, and the horizontal movement distance of the material per unit time is short. The utilization rate of the winnowing box body can be effectively improved, the length of the box body is reduced, and the equipment floor area is reduced.

[0067] The material is thrown into the air classification box at different angles and speeds. The air classification flow in the air classification box is provided by the pressure equalizing chamber 1, and the air speed can be adjusted. According to the floating speed difference between the materials, when the air classification flow speed reaches a certain value, the materials with low floating speed (such as free pure tobacco and light impurities) can float upwards. At the same time, the materials with high floating speed (such as cohesive tobacco, strands, stems, stem blocks and heavy impurities) fall onto the rotating star-shaped throwing roller 3. The star-shaped throwing roller 3 is composed of stacked star-shaped throwing plates at a certain distance from each other. The star-shaped throwing plates on the two adjacent star-shaped throwing rollers are staggered. The materials falling on the star-shaped throwing roller 3 are hit, shaken and torn by the star-shaped throwing plates. In this process, the cohesive tobacco and strands with large volume are loosened, and part of the tobacco is dispersed into free tobacco, and the entrained stems are removed. The above free tobacco, loosened strands and cohesive tobacco that have not been separated float upwards under the action of the upward airflow with high speed between the star-shaped throwing plates on the throwing roller. Since the air classification cavity of the air classification box 5 is wide at the top and narrow at the bottom, as the material floats upwards in the air classification cavity, the airflow speed at the cross section where the material is located also gradually decreases, and when it decreases to a certain value, only the free tobacco with low floating speed continues to float upwards, while the strands and cohesive tobacco that have not been separated will fall onto the rotating star-shaped throwing roller again. The strands and cohesive tobacco falling onto the star-shaped throwing roller repeatedly undergo the above tearing-floating-falling process until the strands and cohesive tobacco are completely dispersed into free tobacco. The qualified tobacco floating in the cavity of the air classification box 5 is collected by the negative pressure suction of the converging cover 7 and is transported to the material-air separator by the negative pressure suction pipeline. At the same time, the stems, stem blocks and heavy impurities with high floating speed fall through the gaps between the star-shaped throwing plates on the star-shaped throwing roller 3 and are output by the impurity output screw conveyor 2, completing the stem separation.

Claims

1. A cut tobacco and stem band separation apparatus characterised in that, It includes equalizing chamber (1), out miscellaneous screw conveyor (2), star-shaped throwing material roller (3), air flow throwing material mechanism (4), winnowing box (5), feed hopper (6), convergence cover (7); The lower side of the equalizing chamber (1) has an equalizing chamber air inlet (11), and the top of the equalizing chamber (1) has an equalizing chamber air outlet (12), and the equalizing chamber air inlet (11) is connected with the positive pressure air inlet pipeline. The winnowing box (5) is located above the equalizing chamber (1), and the bottom of the winnowing box (5) is communicated with the equalizing chamber air outlet (12) at the top of the equalizing chamber (1), and the positive pressure air in the equalizing chamber (1) enters the winnowing box (5) through the equalizing chamber air outlet (12) at the top. The star-shaped throwing material roller (3) is located at the equalizing chamber air outlet (12) at the top of the equalizing chamber (1). The out miscellaneous screw conveyor (2) is located below the star-shaped throwing material roller (3). The winnowing box (5) has a feed inlet (51) on the side, and the air flow throwing material mechanism (4) and the feed hopper (6) are communicated with the feed inlet (51), and the feed hopper (6) is located above the air flow throwing material mechanism (4). The convergence cover (7) is located above the winnowing box (5).

2. A tobacco leaf stem baffle separation apparatus according to claim 1, characterised in that, The air flow throwing material mechanism (4) is inclined and upwardly installed in the middle of the side of the winnowing box (5), and the air flow throwing material mechanism (4) has an inclined and upwardly installed throwing material plate (41), and the included angle between the throwing material plate (41) and the side of the winnowing box (5) is 30°-60°.

3. A tobacco-piugi-bit separator apparatus according to claim 2, characterised in that, Narrow strip-shaped air outlets are formed in the throwing material plate (41).

4. The tobacco strand and stem separation apparatus of claim 1 wherein, The feed hopper (6) is inclined and downwardly installed in the middle of the side of the winnowing box (5), and the included angle between the feed hopper (6) and the side of the winnowing box (5) is 30°-60°.

5. The tobacco strand and stem separation apparatus of claim 1 wherein, With the air flow throwing material mechanism (4) as a dividing surface, the winnowing box (5) is a winnowing cavity with a wide upper part and a narrow lower part.

6. The tobacco strand and stem separation apparatus of claim 1 wherein, An adjustable air cavity adjusting plate (52) is installed at the lower part of the winnowing box (5).

7. The tobacco strand and stem separation apparatus of claim 1 wherein, The equalizing chamber (1) is provided with a first adjusting damper (13), a second adjusting damper (14), a flow guide plate (15) and a microporous equalizing plate (16).

8. The tobacco strand and stem separation apparatus of claim 1 wherein, The star-shaped throwing material roller (3) is composed of stacked star-shaped throwing material plates (31) spaced at a certain distance, and the star-shaped throwing material plates (31) on the two adjacent star-shaped throwing material rollers (3) are staggered.

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