Cut tobacco stem winnowing machine and winnowing method

Abstract

The invention discloses a tobacco stem winnowing machine and a tobacco stem winnowing method, and belongs to the field of tobacco processing. The cut tobacco stem winnowing machine comprises a winnowing machine, a winnowing air supply device, a caked cut tobacco loosening device, a cut tobacco output mechanism, a stem discharging device and the like. According to the tobacco stem winnowing machine, more than two layers of air separation can be carried out in one sorting box, stems in tobacco shreds can be finely separated, and therefore the content of the stems in the tobacco shreds is reduced. Due to the fact that only one winnowing box is used for processing, the loss of water in the tobacco shreds is relatively small, and the generated tobacco shred breakage is small. The tobacco stem winnowing machine is specially designed and manufactured for separating stems in tobacco shreds, and is simple and reliable in equipment structure, convenient to operate and use and good in winnowing effect.

Description

Technical Field

[0001] The invention relates to a tobacco shred processing device, belonging to the field of tobacco processing, and specifically to a device for separating tobacco shreds from stems and a method for air separation of tobacco shreds and stems. Background Art

[0002] In the process of processing tobacco leaves into shredded tobacco, some stems are inevitably mixed in the shredded tobacco, and the amount of stems directly affects the quality of tobacco products. In recent years, the best-selling slim cigarettes have higher requirements for the quality of shredded tobacco. In the production process of slim cigarettes, due to the large amount of stems in the shredded tobacco, a large number of punctured cigarettes, empty cigarettes and other defective and waste products are caused. Therefore, improving the quality of shredded tobacco of slim cigarettes and improving its purity is an effective way to solve the current problems of high defective and waste rates of slim cigarettes, and separating the stems from the shredded tobacco is an important part.

[0003] At present, there is no equipment specifically for separating stems from tobacco. The better tobacco impurity removal equipment uses a two-stage air separation method to remove impurities from tobacco, and can also remove some stems. Although this method can separate some stems from tobacco to a certain extent, some stems from clumped tobacco and some lighter and shorter stems cannot be separated due to their light weight. More importantly, due to repeated air separation, the moisture content of tobacco is greatly reduced, resulting in greater tobacco loss.

[0004] In addition, there are also some ways and methods to deal with clumped tobacco and separate stems. For example, the length of thin cigarette tobacco is controlled and stems are removed through a material-averaging vibrating conveyor, sorting and breaking or roller shearing, and multiple screening by a vibrating screening machine. This method can also remove stems from tobacco, but it uses more mechanical equipment, and the material is easily damaged after being acted upon by these equipment, which increases production costs.

[0005] In order to solve the above problems, the present invention is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a tobacco stem pneumatic separator, which can effectively solve the problems existing in the current tobacco stem removal production. The tobacco stem pneumatic separator of the present invention includes a pneumatic separator, a pneumatic air supply device, a device for loosening agglomerated tobacco, a tobacco output mechanism, a device for discharging stems, etc. The tobacco stem pneumatic separator of the present invention utilizes the principles of aerodynamics and regulates the difference in air volume and wind speed between the two high and low pneumatic separation areas in the pneumatic separator to perform two wind separations on the tobacco fed into the pneumatic separator, and separate the stems mixed therein, thereby effectively reducing the stem content in the tobacco, and also improving the automation level and efficiency of tobacco processing. The equipment realizes the effective separation of tobacco and stems of different sizes and densities by precisely distributing and controlling the airflow, thereby improving the quality of tobacco products.

[0007] A technical solution for achieving the purpose of efficient tobacco processing, the present invention provides a tobacco stem air separator in the first aspect, which includes an air separator body 1, an air separation air supply device 2, a device for loosening agglomerated tobacco 3, a tobacco output mechanism 4, a stem discharge device 5 and a material input device 6;

[0008] The material input device 6 is connected to the air separator body 1 to convey the mixture of shredded tobacco and stems to be air-separated into the air separator body 1;

[0009] The air separation air supply device 2 is connected to the air separation machine body 1 to provide positive pressure air into the air separation machine body 1;

[0010] The agglomerated tobacco loosening device 3 is located in the air separator body 1;

[0011] The tobacco shred output mechanism 4 is connected to the air separator body 1 to output the tobacco shreds obtained after air separation in the air separator body 1 to the air separator body 1;

[0012] The stem sticks discharge device 5 is connected to the air separator body 1 to output the stem sticks obtained after air separation in the air separator body 1 to the air separator body 1;

[0013] The stem discharge device 5 is located below the agglomerated tobacco loosening device 3 , and the air selection and air supply device 2 is located below the material input device 6 .

[0014] In the present invention, up and down refer to up and down in the direction of gravity.

[0015] Preferably, the air separator body 1 comprises a feed inlet 1-1, an upper air inlet 1-2, a lower air inlet 1-3, a tobacco outlet 1-4, a stem outlet 1-5, an observation window 1-6 and an air outlet 1-7;

[0016] The shredded tobacco outlets 1-4 and the stem outlets 1-5 are located at the bottom of the air separator body 1, and the air outlets 1-7 are located at the top of the air separator body 1;

[0017] The upper air inlet 1-2 is located below the feed port 1-1, and the upper air inlet 1-2 is located above the agglomerated tobacco loosening device 3;

[0018] The lower air inlet 1-3 is located below the agglomerated tobacco loosening device 3, and the lower air inlet 1-3 is located above the stem outlet 1-5;

[0019] The observation windows 1 - 6 are located on both sides of the air separator body 1 .

[0020] The main body of the winnowing machine is provided with two upper and lower winnowing air inlets below its tobacco feed port.

[0021] Preferably, the air selection and air supply device 2 includes an air selection fan 2-1, an air volume distribution valve 2-2, an upper air duct 2-3, a lower air duct 2-4, a pressure regulating fan 2-5, a return air duct 2-6 and a filter screen cylinder 2-7;

[0022] The upper air duct 2-3 is connected to the upper air inlet 1-2;

[0023] The lower air duct 2-4 is connected to the lower air inlet 1-3;

[0024] The air volume distribution valve 2-2 is provided at the bifurcation of the upper air duct 2-3 and the lower air duct 2-4;

[0025] The air selection fan 2-1 is respectively connected to the upper air duct 2-3 and the lower air duct 2-4 to provide positive pressure wind;

[0026] The pressure regulating fans 2-5 are located on the top of the air separator body 1;

[0027] The filter screen cylinder 2-7 is located at the air outlet 1-7 at the top of the air separator body 1, and the two ends of the return air duct 2-6 are respectively connected to the air outlet 1-7 and the air separator fan 2-1. The positive pressure wind in the air separator body 1 is filtered by the filter screen cylinder 2-7 and then flows back to the air separator fan 2-1 through the return air duct 2-6.

[0028] Preferably, the agglomerated tobacco loosening device 3 comprises a screen roller assembly 3-3;

[0029] The screen roller assembly 3-3 includes a plurality of screen rollers 3-2, and each screen roller 3-2 includes a plurality of roller screen sheets 3-1; there is a gap between adjacent roller screen sheets 3-1. The agglomerated tobacco loosening device is designed in the form of a roller screen structure.

[0030] Preferably, the tobacco output mechanism 4 comprises a tobacco collecting belt 4 - 1 and a tobacco output air lock 4 - 2 , and the tobacco collecting belt 4 - 1 is located at the bottom of the air separator body 1 .

[0031] Preferably, the main body of the stem-skewer discharge device 5 is a funnel-shaped discharge port, which is wide at the top and narrow at the bottom. An air supply window 5-4 is provided on the side of the stem-skewer discharge device 5, and a movable air regulating door 5-2 that can adjust the size of the air supply window up and down is installed on the air supply window 5-4. A locking handle 5-3 that can lock the air regulating door 5-2 is also provided on the air regulating door 5-2.

[0032] Preferably, the material input device 6 comprises a material conveying belt 6 - 1 , and the material conveyed by the material conveying belt 6 - 1 enters into the air separator body 1 through the feed port 1 - 1 .

[0033] Preferably, the wind speed of the wind blown out of the upper air duct 2-3 is 2 to 5 m / s;

[0034] The wind speed of the wind blown out of the lower air duct 2-4 is 3-6m / s;

[0035] The wind speed of the wind blown out of the air supply window 5-4 is 3.5-7m / s;

[0036] The gap between adjacent roller screen plates 3 - 1 is 5 to 10 mm.

[0037] The second aspect of the present invention provides a method for air separation of cut tobacco stems, using the cut tobacco stems air separation machine described in the first aspect of the present invention, comprising: the material input device 6 conveys a mixture of cut tobacco and stems to be air separated into the air separation machine body 1; the air separation air supply device 2 provides positive pressure air into the air separation machine body 1, thereby separating the first part of the cut tobacco from the mixture of cut tobacco and stems; after the remaining part of the mixture of cut tobacco and stems is loosened by the agglomerated tobacco loosening device 3, the cut tobacco from the remaining part of the mixture of cut tobacco and stems is separated under the action of positive pressure air; the cut tobacco obtained after air separation is output from the air separation machine body 1; the stems obtained after air separation are output from the air separation machine body 1, thereby achieving the separation of cut tobacco and stems.

[0038] Preferably, the stem discharge device 5 also provides supplementary air to further separate the shredded tobacco mixed in the stems.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The main body of the air separator of the present invention is provided with two upper and lower air separation air inlets below the tobacco feed port. The tobacco stem air separator of the present invention can separate the stems from the tobacco in a finer manner through more than two levels of air separation and air separation in one separation box, thereby reducing the stem content in the tobacco. Since the tobacco is processed through only one air separation box, the moisture loss in the tobacco is relatively small, and the tobacco fragments produced are also small.

[0041] 2. The device for loosening clumped tobacco shreds 3 of the present invention comprises a screen roller assembly 3-3; the screen roller assembly 3-3 comprises a plurality of the screen rollers 3-2, and each of the screen rollers 3-2 comprises a plurality of roller screen sheets 3-1. The clumped tobacco shreds roll forward on the device for loosening clumped tobacco shreds 3 as the screen roller assembly 3-3 rotates, and the stems and loosened tobacco shreds therein fall evenly from the gaps of the screen roller assembly 3-3. The remaining clumped tobacco shreds are also gradually loosened by the roller screen sheets 3-1 on the rotating screen rollers 3-2, and fall evenly from the gaps of the screen roller assembly 3-3, thereby achieving the loosening of the clumped tobacco shreds and stems, and providing a basis for separating the two.

[0042] 3. The main body of the stem-pick external discharge device 5 is a funnel-shaped discharge port, which is wide at the top and narrow at the bottom. A wind replenishment window 5-4 is provided on the side of the stem-pick external discharge device 5. On the basis of the two-stage wind selection in the main body of the wind selector, the stem-pick external discharge device 5 of the present invention replenishes wind for three-stage wind selection, further separating the shredded tobacco mixed in the stem-pick. The present invention realizes the effective removal of stem-pick from shredded tobacco, and improves the quality of shredded tobacco.

[0043] 4. This tobacco stem pneumatic separator is specially designed and manufactured for separating tobacco stems. It has a simple and reliable structure, is easy to operate, and has a good pneumatic separation effect.

[0044] 5. The tobacco stem picker of the present invention occupies less space and consumes less energy. The equipment is simple and reliable and easy to operate and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of the tobacco stem air separator of the present invention;

[0046] Figure 2 It is a structural schematic diagram of the main body of the winnowing machine in the tobacco stem winnowing machine of the present invention;

[0047] Figure 3 It is a structural schematic diagram of the air selection and air supply device in the tobacco stem and stick air selection machine of the present invention;

[0048] Figure 4 Schematic diagram of the structure of the agglomerated tobacco loosening device in the tobacco stem air separator of the present invention (wherein the upper left figure is a front view of the agglomerated tobacco loosening device, the upper right figure is a left view of the agglomerated tobacco loosening device, and the lower left figure is a top view of the agglomerated tobacco loosening device);

[0049] Figure 5 It is a schematic diagram of the structure of the tobacco output mechanism in the tobacco stem air separator of the present invention;

[0050] Figure 6 It is a schematic structural diagram of the tobacco stem discharge device in the tobacco stem winnowing machine of the present invention.

[0051] The names of the reference numerals in the description of the drawings: air separator body 1, air separation air supply device 2, agglomerated tobacco loosening device 3, tobacco output mechanism 4, stem discharge device 5, material input device 6;

[0052] Feed inlet 1-1, upper air inlet 1-2, lower air inlet 1-3, tobacco outlet 1-4, stem outlet 1-5, observation window 1-6, air outlet 1-7;

[0053] Air selection fan 2-1, air volume distribution valve 2-2, upper air duct 2-3, lower air duct 2-4, pressure regulating fan 2-5, return air duct 2-6, filter cylinder 2-7;

[0054] Roller screen sheet 3-1, screen roller 3-2, screen roller assembly 3-3;

[0055] Tobacco collecting belt 4-1, tobacco output air lock 4-2;

[0056] Stem outlet 5-1, air adjustment door 5-2, locking handle 5-3, air supply window 5-4;

[0057] Material conveying belt conveyor 6-1. DETAILED DESCRIPTION

[0058] The present invention is further described in detail below in conjunction with embodiments.

[0059] Those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product specifications are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0060] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used herein may include wireless connections.

[0061] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0062] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0063] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0064] Example

[0065] like Figure 1 As shown, the tobacco stem air separator of this embodiment includes an air separator body 1, an air supply device 2, a device for loosening agglomerated tobacco 3, a tobacco output mechanism 4, a stem discharge device 5 and a material input device 6;

[0066] The material input device 6 is connected to the air separator body 1 to convey the mixture of shredded tobacco and stems to be air-separated into the air separator body 1;

[0067] The air separation air supply device 2 is connected to the air separation machine body 1 to provide positive pressure air into the air separation machine body 1;

[0068] The agglomerated tobacco loosening device 3 is located in the air separator body 1;

[0069] The tobacco shred output mechanism 4 is connected to the air separator body 1 to output the tobacco shreds obtained after air separation in the air separator body 1 to the air separator body 1;

[0070] The stem sticks discharge device 5 is connected to the air separator body 1 to output the stem sticks obtained after air separation in the air separator body 1 to the air separator body 1;

[0071] The stem discharge device 5 is located below the agglomerated tobacco loosening device 3 , and the air selection and air supply device 2 is located below the material input device 6 .

[0072] like Figure 2 As shown, the air separator body 1 includes a feed inlet 1-1, an upper air inlet 1-2, a lower air inlet 1-3, a tobacco outlet 1-4, a stem outlet 1-5, an observation window 1-6 and an air outlet 1-7;

[0073] The shredded tobacco outlets 1-4 and the stem outlets 1-5 are located at the bottom of the air separator body 1, and the air outlets 1-7 are located at the top of the air separator body 1;

[0074] The upper air inlet 1-2 is located below the feed port 1-1, and the upper air inlet 1-2 is located above the agglomerated tobacco loosening device 3;

[0075] The lower air inlet 1-3 is located below the agglomerated tobacco loosening device 3, and the lower air inlet 1-3 is located above the stem outlet 1-5;

[0076] The observation windows 1 - 6 are located on both sides of the air separator body 1 .

[0077] The main body of the winnowing machine is provided with two upper and lower winnowing air inlets below its tobacco feed port.

[0078] like Figure 3 As shown, the air separation and air supply device 2 includes an air separation fan 2-1, an air volume distribution valve 2-2, an upper air duct 2-3, a lower air duct 2-4, a pressure regulating fan 2-5, a return air duct 2-6 and a filter screen cylinder 2-7;

[0079] The upper air duct 2-3 is connected to the upper air inlet 1-2;

[0080] The lower air duct 2-4 is connected to the lower air inlet 1-3;

[0081] The air volume distribution valve 2-2 is provided at the bifurcation of the upper air duct 2-3 and the lower air duct 2-4;

[0082] The air selection fan 2-1 is respectively connected to the upper air duct 2-3 and the lower air duct 2-4 to provide positive pressure wind;

[0083] The pressure regulating fans 2-5 are located on the top of the air separator body 1;

[0084] The filter screen cylinder 2-7 is located at the air outlet 1-7 at the top of the air separator body 1, and the two ends of the return air duct 2-6 are respectively connected to the air outlet 1-7 and the air separator fan 2-1. The positive pressure wind in the air separator body 1 is filtered by the filter screen cylinder 2-7 and then flows back to the air separator fan 2-1 through the return air duct 2-6.

[0085] like Figure 4 As shown, the agglomerated tobacco loosening device 3 comprises a screen roller assembly 3-3;

[0086] The screen roller assembly 3-3 includes a plurality of screen rollers 3-2, and each screen roller 3-2 includes a plurality of roller screen sheets 3-1; there is a gap between adjacent roller screen sheets 3-1. The agglomerated tobacco loosening device is designed in the form of a roller screen structure.

[0087] like Figure 5 As shown, the tobacco output mechanism 4 includes a tobacco collecting belt 4 - 1 and a tobacco output air lock 4 - 2 , and the tobacco collecting belt 4 - 1 is located at the bottom of the air separator body 1 .

[0088] like Figure 6As shown, the main body of the stem-skewer discharge device 5 is a funnel-shaped discharge port, which is wide at the top and narrow at the bottom. An air supply window 5-4 is provided on the side of the stem-skewer discharge device 5, and a movable air regulating door 5-2 for adjusting the size of the air supply window up and down is installed on the air supply window 5-4. A locking handle 5-3 for locking the air regulating door 5-2 is also provided on the air regulating door 5-2.

[0089] The material input device 6 includes a material conveying belt 6 - 1 , and the material conveyed by the material conveying belt 6 - 1 enters the air separator body 1 through the feed port 1 - 1 .

[0090] The wind speed of the wind blown out of the upper air duct 2-3 is 2 to 5 m / s;

[0091] The wind speed of the wind blown out of the lower air duct 2-4 is 3-6m / s;

[0092] The wind speed of the wind blown out of the air supply window 5-4 is 3.5-7m / s;

[0093] The gap between adjacent roller screen plates 3 - 1 is 5 to 10 mm.

[0094] The tobacco stem and stick air separation method of the tobacco stem and stick air separation machine of the present embodiment comprises: the material input device 6 conveys the tobacco and stick mixture to be air separated into the air separation machine body 1; the air separation air supply device 2 provides positive pressure air into the air separation machine body 1, thereby separating the first part of the tobacco from the tobacco and stick mixture; after the remaining part of the tobacco and stick mixture is loosened by the agglomerated tobacco loosening device 3, the tobacco from the remaining part of the tobacco and stick mixture is separated under the action of positive pressure air; the tobacco obtained after air separation is output from the air separation machine body 1; the stems obtained after air separation are output from the air separation machine body 1; thereby, the tobacco and stems are separated.

[0095] The stem discharge device 5 also provides supplementary air to further separate the shredded tobacco mixed in the stems.

[0096] Specifically, the process of winnowing tobacco stems is as follows:

[0097] 1. The tobacco to be processed is conveyed by the auxiliary matching belt conveyor to the tobacco stem air separator at a certain speed after being processed by the belt conveyor;

[0098] 2. After the processed tobacco enters the tobacco stem air separator, the wind blown out from the upper air duct 2-3 will first blow the incoming tobacco away. At a wind speed of 2 to 5 m / s, more than half of the lighter tobacco is blown to a farther place of the air separator box by the wind and falls onto the tobacco collecting belt 4-1. After being sent to the tobacco output air lock 4-2 by the tobacco collecting belt 4-1, it is discharged from the tobacco output air lock 4-2 and enters the next process.

[0099] The wind blown out of the upper air duct 2-3 can be adjusted through the variable frequency speed regulation of the air separation fan 2-1 and the air volume distribution valve 2-2, so as to achieve precise control of the air separation wind speed to obtain an ideal air separation effect.

[0100] 3. The remaining tobacco containing stems and some agglomerated tobacco that has not been blown away are scattered downward near the upper air inlet 1-2 onto the agglomerated tobacco loosening device 3. These tobacco materials roll forward on the agglomerated tobacco loosening device 3 as its screen roller assembly 3-3 rotates. The stems and loosened tobacco fall evenly from the gaps of the screen roller assembly 3-3, and the remaining agglomerated tobacco is gradually loosened by the roller screen 3-1 on the rotating screen roller 3-2 and falls evenly from the gaps of the screen roller assembly 3-3.

[0101] The gap of the screen roller assembly 3-3 of the agglomerated tobacco loosening device 3, that is, the gap between the roller screen plates 3-1, is determined to be controlled between 5 and 10 mm through continuous testing. The best loosening effect can be achieved by adjusting the rotation speed of the screen roller 3-2 by frequency conversion.

[0102] 4. After being loosened by the above-mentioned agglomerated tobacco loosening device 3, the tobacco and stems falling evenly from the bottom are blown away by the wind blown out of the lower air duct 2-4. At a wind speed of 3-6 m / s, more than 70% of the lighter tobacco is blown to a farther place of the air separation box by the wind, and still falls on the tobacco collecting belt 4-1, merges with the tobacco on the tobacco collecting belt 4-1, and is sent to the tobacco output air lock 4-2 by the tobacco collecting belt 4-1, and then discharged from the tobacco output air lock 4-2 to enter the next process.

[0103] The wind blown out of the lower air duct 2-4 can be adjusted through the variable frequency speed regulation of the air separation fan 2-1 and the air volume distribution valve 2-2, so as to achieve precise control of the air separation wind speed to obtain an ideal air separation effect.

[0104] 5. After the second wind selection by the wind blown out of the lower air duct 2-4, the tobacco shreds and stems that are not blown away by the wind of the lower air duct 2-4 and continue to fall enter the stem discharge device 5. Since the stem discharge device 5 is a funnel shape with a large top and a small bottom, and there is supplementary air from bottom to top at its outlet (small mouth end) with a wind speed of 3.5 to 7 m / s. Therefore, the remaining small amount of tobacco shreds and stems that finally enter the stem discharge device 5 need to be selected by wind again. By adjusting the exhaust air volume of the pressure regulating fan 2-5 and adjusting the air regulating door 5-2 on the stem discharge device 5, the wind speed of the supplementary air from bottom to top can be accurately controlled, so as to separate the remaining small amount of tobacco shreds and stems. The tobacco shreds are brought to the tobacco shreds collection belt 4-1 by the wind from bottom to top, and the stems fall from the outlet of the stem discharge device 5 and are discharged.

[0105] 6. After the wind from the upper air duct 2-3 and the lower air duct 2-4 blows the tobacco to a far distance, the tobacco falls onto the tobacco collection belt 4-1, and the wind passes through the filter screen cylinder 2-7 and the return air duct 2-6 to return to the wind selection fan 2-1 for recycling. The filter screen cylinder 2-7 can intercept a small amount of extremely small broken shreds that float up with the wind, and the screen cylinder cleaning roller sweeps them down and returns them to the tobacco collection belt 4-1.

Claims

1. A tobacco stem winnowing machine, characterized in that: The invention comprises a wind separator main body (1), a wind separation air supply device (2), a device for loosening agglomerated tobacco shreds (3), a tobacco shred output mechanism (4), a stem discharge device (5) and a material input device (6); The material input device (6) is connected to the air separator body (1) to convey the mixture of shredded tobacco and stems to be air-separated into the air separator body (1); The air separation air supply device (2) is connected to the air separation machine body (1) to provide positive pressure air into the air separation machine body (1); The agglomerated tobacco loosening device (3) is located inside the air separator body (1); The tobacco shred output mechanism (4) is connected to the air classifier body (1) to output the tobacco shreds obtained after air selection in the air classifier body (1) to the air classifier body (1); The stem-picking external discharge device (5) is connected to the air separator main body (1) so as to output the stem-picking obtained after air separation in the air separator main body (1) to the air separator main body (1); The stem discharge device (5) is located below the agglomerated tobacco loosening device (3), and the air selection and air supply device (2) is located below the material input device (6).

2. The tobacco stem winnowing machine according to claim 1, characterized in that: The air separator body (1) comprises a feed inlet (1-1), an upper air inlet (1-2), a lower air inlet (1-3), a tobacco shred outlet (1-4), a stem outlet (1-5), an observation window (1-6) and an air outlet (1-7); The shredded tobacco outlet (1-4) and the stem outlet (1-5) are located at the bottom of the air separator body (1), and the air outlet (1-7) is located at the top of the air separator body (1); The upper air inlet (1-2) is located below the feed port (1-1), and the upper air inlet (1-2) is located above the agglomerated tobacco loosening device (3); The lower air inlet (1-3) is located below the agglomerated tobacco loosening device (3), and the lower air inlet (1-3) is located above the stem outlet (1-5); The observation windows (1-6) are located on both sides of the air separator body (1).

3. The tobacco stem winnowing machine according to claim 2, characterized in that: The air separation and air supply device (2) comprises an air separation fan (2-1), an air volume distribution valve (2-2), an upper air duct (2-3), a lower air duct (2-4), a pressure regulating fan (2-5), an air return duct (2-6) and a filter screen cylinder (2-7); The upper air duct (2-3) is in communication with the upper air inlet (1-2); The lower air duct (2-4) is in communication with the lower air inlet (1-3); The air volume distribution valve (2-2) is provided at the bifurcation of the upper air duct (2-3) and the lower air duct (2-4); The air selection fan (2-1) is respectively connected to the upper air duct (2-3) and the lower air duct (2-4) to provide positive pressure wind; The pressure regulating fan (2-5) is located on the top of the air separator body (1); The filter cylinder (2-7) is located at the air outlet (1-7) at the top of the air separator body (1), and the two ends of the return air duct (2-6) are respectively connected to the air outlet (1-7) and the air separator fan (2-1). The positive pressure air in the air separator body (1) is filtered by the filter cylinder (2-7) and then flows back to the air separator fan (2-1) through the return air duct (2-6).

4. The tobacco stem winnowing machine according to claim 3, characterized in that: The agglomerated tobacco loosening device (3) comprises a screen roller assembly (3-3); The screen roller assembly (3-3) comprises a plurality of screen rollers (3-2), and each screen roller (3-2) comprises a plurality of roller screen sheets (3-1); and there is a gap between adjacent roller screen sheets (3-1).

5. The tobacco stem winnowing machine according to claim 4, characterized in that: The tobacco shred output mechanism (4) comprises a tobacco shred collection belt (4-1) and a tobacco shred output air lock (4-2), and the tobacco shred collection belt (4-1) is located at the bottom of the air separator body (1).

6. The tobacco stem winnowing machine according to claim 5, characterized in that: The main body of the stalk discharge device (5) is a funnel-shaped discharge port, which is wide at the top and narrow at the bottom. An air supply window (5-4) is provided on the side of the stalk discharge device 5. A movable air regulating door (5-2) capable of adjusting the size of the air supply window up and down is installed on the air supply window (5-4). A locking handle (5-3) capable of locking the air regulating door (5-2) is also provided on the air regulating door (5-2).

7. The tobacco stem winnowing machine according to claim 6, characterized in that: The material input device (6) comprises a material conveying belt conveyor (6-1), and the material conveyed by the material conveying belt conveyor (6-1) enters the air separator body (1) through the material feed port (1-1).

8. The tobacco stem winnowing machine according to claim 7, characterized in that: The wind speed of the wind blown out of the upper wind duct (2-3) is 2 to 5 m / s; The wind speed of the wind blown out of the lower wind duct (2-4) is 3 to 6 m / s; The wind speed of the wind blown out of the air supply window (5-4) is 3.5-7m / s; The gap between adjacent roller screen plates (3-1) is 5 to 10 mm.

9. A method for winnowing tobacco stems, characterized in that: The tobacco shredded tobacco and stem stick air separator according to any one of claims 1 to 8 comprises: the material input device (6) conveys the tobacco shredded tobacco and stem stick mixture to be air-separated into the air separator body (1); the air separation air supply device (2) provides positive pressure air into the air separator body (1), thereby separating the first part of the tobacco shredded tobacco and stem stick mixture; after the remaining part of the tobacco shredded tobacco and stem stick mixture is loosened by the agglomerated tobacco shred loosening device (3), the tobacco shredded tobacco and stem stick mixture is separated under the action of positive pressure air; the tobacco shredded tobacco obtained after air separation is output from the air separator body (1); the stem sticks obtained after air separation are output from the air separator body (1); thereby achieving the separation of tobacco shredded tobacco and stem sticks.

10. The method for winnowing tobacco stems according to claim 9, characterized in that: The stem discharge device (5) also provides supplementary air to further separate the shredded tobacco mixed in the stems.

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