A stem shred guide device for separating light and thin flakes

Abstract

The present invention discloses a shredded stem flow guide device for separating light and thin slices. The shredded stem flow guide device (1) comprises a flow guide plate (11) and a throwing roller (12). The flow guide plate (11) is in the shape of a triangular prism. One rectangular surface of the flow guide plate (11) is attached to the surface of the throwing roller (12), and the other rectangular surface is a flow guide surface (112). The shredded stem flow guide device of the present invention can ensure that the negative pressure wind at the bottom of the flow guide plate (11) is isolated to make the shredded stem material rise, and all the shredded stems enter the concave arc surface of the shredded stem distribution plate, and the shredded stems are not blocked or accumulated at the feed inlet.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco processing, and in particular relates to a cut stem guide device for separating light and thin slices. Background Art

[0002] Cut stems are the main component of tobacco formula. Due to their high filling value, low cost, high combustibility, etc., they are widely used in various cigarette processing companies. The current usage ratio range is 5.0-20.0wt%. By using cut stems, the cost of cigarette formula can be effectively reduced and the quality of cigarettes can be adjusted.

[0003] In recent years, with the in-depth research on stem shred processing technologies such as thin pressing and thin cutting, hot pressing and cold cutting, the appearance of stem shreds has been significantly improved, mainly reflected in the improvement of the uniformity of the blending of stem shreds and leaf shreds, and the significant improvement in the stability of the physical quality of cigarettes. Due to the use of thin pressing and thin cutting technology, the degree of unevenness in cutting stems has increased. After expansion and drying, stem shreds with too small thickness become thin and flaky stem shreds. After drying, thin and flaky stem shreds are mostly whitish and translucent, with low density and many flakes. In the subsequent processing, thin and flaky stem shreds are easy to break and have low processing resistance, especially in the blending link with leaf shreds, the uniformity of stem shreds blending decreases. Due to the low density of thin and light stem shreds, the thin and light stem shreds are mostly distributed on both sides of the mixing belt after blending, resulting in large fluctuations in the physical quality of the finished tobacco shreds; at the same time, the air conveying rolling process has problems such as large breakage, low processing resistance, and fluctuations in tobacco moisture, which are difficult to control.

[0004] In the actual production process, after statistical calculation of 10 batches, the thin stems account for 15-25wt% of the normal stems. In the subsequent processing steps, most of the thin stems are converted into ash and dusted, which increases the dust removal load of the cigarette making machine and affects the quality of the finished cigarettes. Therefore, the thin stems must be removed.

[0005] In order to solve the above problems, the present invention designs a device for separating thin and light flaky stem shreds using a throwing roller and a method for separating thin and light flaky stem shreds using the device. Summary of the invention

[0006] The present invention provides an online device for separating thin and light flaky stem shreds using a throwing roller, and the device is designed for the first time. After the thin and light flaky stem shreds are separated by the device, the obtained finished stem shreds have the advantages of high stem shred wholeness rate, high filling value, strong processing resistance, the color of the stem shreds is closer to that of the leaf shreds, and good blending effect.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A device for separating thin and light flaky stem shreds using a throwing roller, comprising: a vertically placed separation bin T) and a stem shred guide device 1 and a stem shred distribution plate 2 arranged inside the separation bin T;

[0009] The shredded stem guide device 1 comprises a guide plate 11 and a throwing roller 12, wherein the guide plate 11 is in the shape of a triangular prism, one rectangular surface of the guide plate 11 is attached to the surface of the throwing roller 12, and the other rectangular surface is a guide surface 112; the shredded stem distribution plate 2 is in the shape of an arc surface and has a plurality of pores 21 evenly distributed thereon;

[0010] The upper part of the shredded stem flow guide device 1 is a shredded stem feed port T1, and the flow guide plate 11 is arranged at the upper part of the side of the throwing roller 12 so that the flow guide surface 112 guides the shredded stems coming from the feed port T1 to the surface of the throwing roller 12; the upper part of the shredded stem distribution plate 2 is an air suction port T2, and the air suction port T2 is externally connected to an exhaust fan T22; the shredded stem distribution plate 2 is arranged at the lower part of the side of the shredded stem flow guide device 1 and the concave arc surface faces the shredded stem flow guide device 1.

[0011] Preferably, the surface of the guide plate 11 that fits the surface of the throwing roller 12 is an inner concave arc surface 111, and the inner concave arc surface 111 is adapted to the surface of the throwing roller 12; the upper end of the guide surface 112 is arranged at the lower part of the feed port T1, and the lower end is arranged on the surface of the throwing roller 12. The other rectangular surface of the guide plate 11 is the guide surface 112. The area of ​​the remaining rectangular surface of the guide plate 11 can be the same as or different from the area of ​​the guide surface 112.

[0012] Preferably, the surface of the throwing roller 12 is provided with a plurality of material-distributing stoppers 121, which are axially parallel and evenly arranged on the surface of the throwing roller 12, and each material-distributing stopper 121 is bent at the midpoint to form a swallow-wing shape with the tip 1211 facing forward on the surface of the throwing roller 12. Here, "forward" refers to the rotation direction of the throwing roller.

[0013] Preferably, the opening rate of the shredded stem distribution plate 2 is 5.0%-20.0%.

[0014] Preferably, a guide plate 3 is provided at the bottom of the separation bin T, and a discharge port T3 is provided at the bottom of the guide plate 3 ; the discharge port T3 is located at the lower part of the shredded stem distribution plate 2 .

[0015] Preferably, the angle of the guide surface 112 relative to the horizontal plane is adjustable, and the rotation speed of the throwing roller 12 is adjustable.

[0016] Preferably, the angle of the section of the convex arc surface of the shredded stem distribution plate 2 relative to the horizontal plane is adjustable.

[0017] Preferably, the exhaust speed of the exhaust fan T22 is adjustable.

[0018] Preferably, the separation chamber T is in the shape of a cuboid.

[0019] The second aspect of the present invention discloses a method for separating thin and light flaky stem shreds using the above-mentioned device, comprising the following steps: turning on the exhaust fan T22 to adjust the wind speed, the stem shreds coming in from the feed port T1 slide through the guide surface 112 to the uniform material guard 121 on the throwing roller 12, the throwing roller 12 rotates toward the tip 1211, and the stem shreds in the uniform material guard 121 are dispersed axially and thrown toward the concave arc surface of the stem shred distribution plate 2; due to the action of the exhaust fan T22, negative pressure is formed in the separation chamber T, and wind flows from the lower part of the stem shred distribution plate 2 through the uniform air holes 21 to the concave arc surface of the stem shred distribution plate 2, forming a fluidized separation space on the upper part of the concave arc surface of the distribution plate 2, and forming a single-layer, discrete and uniform stem shreds in this fluidized space; at this time, the thin and light flaky stem shreds are sucked into the air suction port T2, and the remaining finished stem shreds fall into the guide plate 3 by gravity, and then are discharged from the discharge port T3.

[0020] By adjusting the angle of the guide surface 112 relative to the horizontal plane, the rotation speed of the throwing roller 12, the angle of the section of the convex arc surface of the shredded stem distribution plate 2 relative to the horizontal plane, and the exhaust speed of the exhaust fan T22, any proportion of finished shredded stems can be separated.

[0021] Beneficial effects of the present invention

[0022] 1. The device for separating thin and light flaky shredded stems using a throwing roller can utilize the negative pressure wind of the shredded stem dust removal pipeline to fully separate the finished shredded stems from the thin and light flaky shredded stems. The device of the present invention is designed for the first time and can be directly connected to the shredded stem air delivery and blanking section on the production line. The device occupies a small area and is conducive to industrial production.

[0023] 2. The concave arc surface 111 of the guide plate 11 of the guide device 1 of the device of the present invention is in contact with the surface of the throwing roller 12, and the concave arc surface 111 is adapted to the surface of the throwing roller 12; the upper end of the guide surface 112 is arranged at the lower part of the feed port T1, and the lower end is arranged on the surface of the throwing roller 12; and the angle of the guide surface 112 relative to the horizontal plane is adjustable, and the rotation speed of the throwing roller 12 is adjustable. In this way, it can be ensured that the negative pressure wind at the bottom of the guide plate 11 is isolated to make the stem shreds rise, and all the stem shreds enter the concave arc surface of the stem shred distribution plate, and the stem shreds do not block or accumulate at the feed port. The area of ​​the remaining rectangular surface of the guide plate 11 can be the same as or different from the area of ​​the guide surface 112, and can be designed as needed; at the same time, the angle between the two surfaces can be designed as needed.

[0024] 3. The material-distributing stoppers on the surface of the throwing roller of the device of the present invention are arranged parallel to the axis and evenly, and each material-distributing stopper 121 is bent at the midpoint to form a swallow-wing shape with the tip 1211 facing forward on the surface of the throwing roller 12. The direction of rotation is that the throwing roller 12 rotates toward the tip 1211, so that the shredded stems in the material-distributing stoppers 121 can be evenly dispersed along the axis and thrown toward the concave arc surface of the shredded stem distribution plate 2. The material-distributing stoppers on the surface of the throwing roller of the present invention are cleverly designed.

[0025] 4. The shredded stem distribution plate of the device of the present invention is cleverly designed, and the uniform opening rate thereon is 5.0-20.0%. The shredded stem distribution plate is a concave arc-surfaced flow guide device, and the wind flows from the lower part thereof through the uniform air holes to the concave arc surface of the shredded stem distribution plate, forming a uniformly distributed wind pressure on the concave arc surface, and at the same time, the wind forms a positive pressure on the concave arc surface, so that the shredded stems thrown by the throwing roller are in flexible contact with the concave arc surface, so that the thin and light shredded stems are turned over and run upward, and the shredded stems are not easy to be broken.

[0026] 5. The discharge port of the device of the present invention is arranged at the lower part of the shredded stem distribution plate. Since the discharge port is the only air inlet of the closed separation chamber, the wind entering from the discharge port passes through the shredded stem distribution plate and flows evenly through the air holes to the concave arc surface of the shredded stem distribution plate, thereby forming evenly distributed wind pressure on the concave arc surface, further making the shredded stems thrown by the throwing roller in flexible contact with the concave arc surface, so that the shredded stems are no longer easily broken.

[0027] 6. The device of the present invention is used to separate the shredded stems, which has no effect on the smoothness of the material conveying on the production line, and the moisture of the shredded stems is not lost during the processing; the finished shredded stems after separation and removal of the light and thin flakes have a higher wholeness rate, a higher density, improved processing resistance, and an increased filling value. The color of the finished shredded stems is closer to that of the leaf shreds, and the blending effect of the finished shredded stems and the leaf shreds is more uniform. The use value of the shredded stems is significantly improved.

[0028] 7. The device of the present invention can be used to separate the thin and light stems in the stems. By adjusting the opening rate of the stem distribution plate, the exhaust speed of the exhaust fan T22, the speed of the throwing roller, etc., it can also remove the high-density components in the stems, such as stem sticks in the stems, wet stems and other debris. Therefore, the device of the present invention can have multiple functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a device for separating thin and light flaky shredded stems using a throwing roller according to the present invention.

[0030] Figure 2 Schematic diagram of the guide plate of the present invention.

[0031] Figure 3 It is a schematic diagram of the combination of the guide plate and the throwing roller of the present invention; the direction of the arrow is the rotation direction of the throwing roller.

[0032] Figure 4 It is a schematic diagram of the distribution plate of the present invention.

[0033] Figure 5 The photographs are of the light and thin flaky stems (right) and the finished stems (left) separated by the device of the present invention in the example.

[0034] The accompanying drawings are marked as follows: 1. guide device; 11. guide plate; 111. concave arc surface; 112. guide surface; 12. throwing roller; 121. material leveling stop; 1211. tip; 2. distribution plate; 21. air hole; 3. guide plate; T. separation bin; T1. feed port; T2. air suction port; T22. exhaust fan; T3. discharge port. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and beneficial results of the present invention clearer, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. However, the accompanying drawings and embodiments are not limitations of the technical solution of the present invention, and any changes or improvements made based on the teachings of the present invention belong to the protection scope of the present invention.

[0036] like Figure 1 As shown, a device for separating thin and light flaky stem shreds using a throwing roller comprises: a vertically placed rectangular separation bin T and a stem shred guide device 1 and a stem shred distribution plate 2 arranged inside the separation bin T; the stem shred guide device 1 comprises a guide plate 11 and a throwing roller 12, and a plurality of material-distributing stoppers 121 are arranged on the surface of the throwing roller 12; the stem shred distribution plate 2 is in an arc shape and has a plurality of air holes 21 evenly distributed thereon; the upper portion of the stem shred guide device 1 is a stem shred feed port T1, and the guide plate 11 is arranged on the upper portion of the throwing roller 12 for The shredded stems from the feed port T1 are directed to the surface of the throwing roller 12; the upper part of the shredded stem distribution plate 2 is an air suction port T2, and the air suction port T2 is externally connected to an exhaust fan T22; the shredded stem distribution plate 2 is arranged at the lower side of the shredded stem guide device 1 and the concave arc surface faces the shredded stem guide device 1; the bottom of the separation bin T is provided with a guide plate 3, the bottom of the guide plate 3 is a discharge port T3, and the discharge port T3 is located directly below the shredded stem distribution plate 2; the exhaust speed of the exhaust fan T22 of the air suction port T2 is adjustable.

[0037] like Figure 2As shown, the guide plate 11 is a triangular prism with a rectangular surface as an inner concave arc surface 111, and the other rectangular surface of the guide plate 11 is a guide surface 112. The upper end of the guide surface 111 is arranged at the lower part of the feed port T1, and the lower end of the guide surface 111 is arranged on the surface of the throwing roller 12. The inner concave arc surface 111 of the guide plate 11 is adapted to the surface of the throwing roller 12. The angle of the guide surface 112 relative to the horizontal plane is adjustable, and the speed of the throwing roller 12 is adjustable, so as to prevent the stems from being blocked or accumulated on the guide plate or the throwing roller surface. The guide plate 11 is welded by two rectangular straight plates of unequal areas and a concave arc plate, and its material can be 307 stainless steel. Its inner concave arc surface 111 is dynamically and tightly fitted with the material balancing stop 121 of the throwing roller 12, isolating the negative pressure wind at the bottom of the guide plate 11 from causing the stems to rise; the guide plate 11 can be pneumatically controlled.

[0038] like Figure 3 As shown, the material distribution barrier 121 is axially parallel and evenly arranged on the surface of the throwing roller 12, and each material distribution barrier 121 is bent at the midpoint to form a swallow-wing shape with the tip 1211 facing forward on the surface of the throwing roller 12, and the throwing roller 12 rotates in the direction forward of the tip 1211. The material of the throwing roller 12 can be made of a steel shaft + a stainless steel cylinder; the material distribution barrier 121 can be made of silicone or PE, and its height can be 2.5mm-50mm according to requirements. This height can achieve uniform distribution of the stem shreds in the material distribution barrier on the surface of the throwing roller, and evenly and quickly throw them to the fluidized separation space on the upper part of the concave arc surface of the stem shred distribution plate 2, so as to achieve the monolayer, discretization and uniformity of the stem shreds.

[0039] like Figure 4 As shown, the opening rate of the uniform opening of the shredded stem distribution plate 2 is 5.0-20.0%, which can ensure that the wind flows from the lower part through the uniform air holes 21 to the concave arc surface of the shredded stem distribution plate to form a uniformly distributed wind pressure. At the same time, the wind forms a positive pressure on the concave arc surface, so that the shredded stems thrown by the throwing roller 12 are in flexible contact with the concave arc surface of the shredded stem distribution plate 2, resulting in flipping and upward movement, and the shredded stems are no longer easy to break. The angle of the section of the convex arc surface of the shredded stem distribution plate 2 relative to the horizontal plane can be adjusted. The shredded stem distribution plate 2 can be made of 307 stainless steel.

[0040] A plurality of inspection doors may be provided on the wall of the separation bin T, through which the flow and discrete state of the stems can be monitored, the transmission pneumatic conveying device can be inspected, and routine maintenance of components can be performed.

[0041] The method for separating thin and light flaky stem shreds using the above-mentioned device comprises the following steps: turning on the exhaust fan T22 to adjust the wind speed, adjusting the angle of the guide surface 111 relative to the horizontal plane to 60°, adjusting the angle of the convex arc surface of the cut stem distribution plate 2 relative to the horizontal plane to 60°, setting the rotation speed of the throwing roller to 80 rpm, and setting the fan opening of the exhaust fan T22 to 25%; the stem shreds coming from the feed inlet T1 slide along the guide surface 112 to the material distribution layer 121 of the throwing roller 12 under the action of gravity and negative pressure, so that the stem shreds are evenly distributed in the axial direction of the throwing roller, and the rotating throwing roller 12 rotates in the direction forward of the tip 1211 to distribute the material distribution layer 121 to the material distribution layer 121. The shredded stems in 121 are dispersed along the axial direction and thrown into the concave arc surface of the shredded stem distribution plate 2; due to the action of the exhaust fan T22, negative pressure is formed in the separation chamber T, and the wind passes through the uniform air holes 21 from the lower part of the shredded stem distribution plate 2 to the concave arc surface of the shredded stem distribution plate 2, and a fluidized separation space is formed on the upper part of the concave arc surface of the distribution plate 2, and the shredded stems are monolayered, discrete and uniform in this fluidized space; at this time, the thin and light flaky shredded stems are sucked into the suction port T2 by the negative pressure wind, and the remaining finished shredded stems fall into the guide plate 3 by gravity due to their high density, and then are discharged from the discharge port T3; the discharge port T3 can be connected to the equipment on the original production line. The discharge port of the device is arranged at the lower part of the shredded stem distribution plate. Since the discharge port is the only air inlet of the closed separation chamber, the wind entering from the discharge port passes through the uniform air holes from the lower part of the shredded stem distribution plate 2 and flows to the concave arc surface of the shredded stem distribution plate to form a uniformly distributed wind pressure, which further makes the shredded stems thrown by the throwing roller contact with the concave arc surface flexibly, and the shredded stems are no longer easy to be broken.

[0042] The result of using the device of the present invention to separate thin and light flaky stems is as follows: the amount of thin and light flaky stems separated is 177.8 kg / batch, the weight of the finished stems obtained is 1543.4 kg / batch, and the selection rate of thin and light flaky stems is the ratio of the weight of the thin and light flaky stems to the weight of the incoming stems is 177.8 / (177.8+1543.4)=10.33%. The separation effect is shown in Figure 5 Photos shown.

[0043] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for separating thin and light flaky shredded stems using a device for separating thin and light flaky shredded stems using a throwing roller, characterized in that: The device comprises: a vertically placed separation bin and a shredded stem guide device and a shredded stem distribution plate arranged inside the separation bin; The cut stem guide device comprises a guide plate and a throwing roller. The guide plate is in the shape of a triangular prism, one rectangular surface of the guide plate is attached to the surface of the throwing roller, and the other rectangular surface is a guide surface; the cut stem distribution plate is in the shape of an arc surface and has a plurality of pores evenly distributed thereon; The upper part of the cut stem guide device is the cut stem feed port, and the guide plate is arranged on the upper part of the throwing roller so that the guide surface guides the cut stems coming from the feed port to the surface of the throwing roller; the upper part of the cut stem distribution plate is the air suction port, and the air suction port is externally connected to an exhaust fan; the cut stem distribution plate is arranged on the lower part of the cut stem guide device, and the concave arc surface faces the cut stem guide device; the opening rate of the cut stem distribution plate is 5.0%-20.0%; The surface of the guide plate that fits the surface of the throwing roller is an inner concave arc surface, and the inner concave arc surface is adapted to the surface of the throwing roller; the upper end of the guide surface is arranged at the lower part of the feed inlet, and the lower end is arranged on the surface of the throwing roller; the other rectangular surface of the guide plate is the guide surface; The surface of the throwing roller is provided with a plurality of material-distributing guard skins, which are axially parallel and evenly arranged on the surface of the throwing roller, and each material-distributing guard skin is bent at the midpoint to form a swallow-wing shape with the tip forward on the surface of the throwing roller; There is a material guide plate at the bottom of the separation bin, and the bottom of the material guide plate is a discharge port; the discharge port is located at the lower part of the stem shred distribution plate; The angle of the guide surface relative to the horizontal plane is 60°, and the speed of the throwing roller is 80rpm; The angle of the section of the convex arc surface of the stem distribution plate relative to the horizontal plane is 60°; The fan opening of the exhaust fan's exhaust speed is 25%; The specific steps are as follows: turn on the exhaust fan and adjust the wind speed. The stem shreds coming in from the feed port slide through the guide surface to the uniform material barrier on the throwing roller. The throwing roller rotates toward the tip end, and the stem shreds in the uniform material barrier are dispersed axially and thrown to the concave arc surface of the stem shred distribution plate. Due to the action of the exhaust fan, negative pressure is formed in the separation chamber, and wind flows from the lower part of the stem shred distribution plate through uniform air holes to the concave arc surface of the stem shred distribution plate, forming a fluidized separation space on the upper part of the concave arc surface of the distribution plate, and single-layered, discrete and uniform stem shreds are formed in this fluidized space. At this time, light and thin flaky stem shreds are sucked into the air suction port, and the remaining finished stem shreds fall into the guide plate by gravity, and then are discharged from the discharge port.

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