Static negative-pressure impurity removal device for tobacco leaves

Abstract

The utility model discloses an electrostatic negative-pressure impurity removal device for tobacco leaves, and belongs to impurity removal devices. The tobacco leaf impurity removing device is simple in structure and good in impurity removing effect. The device comprises an electrostatic adsorption device which is fixed above a vibration conveying groove through a portal frame; the electrostatic adsorption device is composed of an installation frame (6) which is fixed to the portal frame (1) and is of a rectangular box structure, a plurality of adsorption rollers (5) arranged in the installation frame in the conveying direction, a motor (11) driving all the adsorption rollers (5) to rotate through a transmission device (2) and an electrostatic generator (14) electrically connected with all the adsorption rollers (5). A ventilation window communicated with the air suction pipe (12) is formed in the top of the mounting frame (6), and the surface of each adsorption roller (5) is coated with an insulating layer. The device not only can prevent light and fine fibers from being wound and blocking gaps between the adsorption rollers and improve the impurity removal effect, but also has a dust removal effect.

Description

Technical Field

[0001] The utility model relates to a device for removing impurities from tobacco leaves, in particular to a device for removing light and fine fiber impurities mixed in tobacco leaves by utilizing static electricity and negative pressure. Background Art

[0002] During the storage and transportation of tobacco leaves, they are generally packaged in sacks. It is inevitable that hemp, chemical fiber, hair and other light and fine debris will be mixed into tobacco leaves or tobacco slices, which directly affects the quality of cigarette products. At present, in the process of leaf threshing and re-roasting, mechanical devices, photoelectric foreign matter removal devices, wind selection devices and other equipment are usually used to remove hemp and other impurities mixed into tobacco leaves, such as "a hemp removal machine for tobacco material transportation (CN220611330U)", "a tobacco thinning and electrostatic impurity removal device (CN207370071U)". However, although these devices can absorb hemp and chemical fiber, it is difficult to discharge them quickly, so it is easy to cause hemp and chemical fiber to be entangled and blocked, which ultimately affects the impurity removal effect. It can be seen that how to effectively remove light and fine debris mixed in tobacco leaves or tobacco slices is a technical problem that needs to be solved urgently in the tobacco industry. Utility Model Content

[0003] In view of the above-mentioned defects existing in the prior art, the utility model aims to provide a tobacco leaf electrostatic negative pressure impurity removal device with simple structure and good impurity removal effect.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it includes an electrostatic adsorption device fixed on the top of the vibrating conveying trough through a gantry; the electrostatic adsorption device is composed of a mounting frame fixed on the gantry and having a rectangular box-shaped structure, a plurality of adsorption rollers arranged in the mounting frame along the conveying direction, a motor that drives each adsorption roller to rotate through a transmission device, and an electrostatic generator electrically connected to each adsorption roller; a ventilation window connected to a suction pipe is provided on the top of the mounting frame, and the surface of each adsorption roller is covered with an insulating layer.

[0005] A scraper in contact with the insulating layer of the adsorption roller is fixed in the mounting frame.

[0006] The ventilation window is communicated with the air suction pipe through a trumpet-shaped air guide cover.

[0007] A plowshare-shaped material-distributing plate extending downward into the vibrating conveying trough and arranged in the opposite direction to the conveying direction is fixed on the gantry.

[0008] The mounting frame is fixed on the gantry through a first adjusting device, which is composed of two inverted concave-shaped hangers fixed on the mounting frame, two first adjusting screws fixed on each hanger and passing upward through the gantry, and a first locking nut fixed on each first adjusting screw.

[0009] The material balancing plate is fixed on the gantry through a second adjusting device, which is composed of two second adjusting screws fixed on the material balancing plate and passing upward through the gantry, and a second locking nut fixed on each second adjusting screw.

[0010] Compared with the prior art, the utility model has the following advantages due to the adoption of the above technical solution:

[0011] 1) Since an electrostatic field is applied between the adsorption roller and the vibrating conveyor trough, when the tobacco leaves are shaken by the vibrating conveyor trough, the light and fine fibers such as hemp and hair mixed in the tobacco leaves can be lifted up and adsorbed on the adsorption roller. At the same time, since the mounting frame is connected to the suction pipe, the light and fine fibers such as hemp and hair on the adsorption roller can be discharged through the suction pipe under the action of negative pressure, which can not only prevent the light and fine fibers from entangled and blocking the gap between the adsorption rollers, improve the impurity removal effect, but also have a dust removal effect.

[0012] 2) Due to the provision of a scraper, the light and fine fibers adhering to the adsorption roller are "scooped up", which is conducive to the negative pressure to quickly discharge them.

[0013] 3) Since the first adjustment device is provided between the gantry and the mounting frame, the distance between the electrostatic adsorption device and the vibrating conveying trough can be adjusted according to the dryness of different batches of tobacco leaves, thereby controlling the magnitude of the electrostatic adsorption force and the negative pressure adsorption force.

[0014] 4) Since a material distribution plate is installed on the gantry, the tobacco leaves can be spread thinly to avoid accumulation of tobacco leaves in the vibrating conveyor trough, and the impurity and dust removal effects are better. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 yes Figure 1 A-A section view in.

[0017] In the figure: gantry 1, transmission device 2, scraper 3, vibrating conveyor trough 4, adsorption roller 5, mounting frame 6, material distribution plate 7, second adjusting screw 8, hanger 9, air guide cover 10, motor 11, suction pipe 12, first adjusting screw 13, electrostatic generator 14. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figures 1-2As shown: the electrostatic adsorption device is fixed on the top of the vibrating conveying trough 4 through the gantry 1. The electrostatic adsorption device is composed of a mounting frame 6 fixed on the gantry 1 in a rectangular box-shaped structure, a plurality of adsorption rollers 5 arranged in the mounting frame along the conveying direction, a synchronous belt connecting each adjacent adsorption roller 5 (not shown in the figure), a motor 11 fixed on the mounting frame 6, a chain transmission device 2 connected between the motor and any adsorption roller 5, and an electrostatic generator 14 fixed on the mounting frame 6. The output ends of the electrostatic generator 14 are electrically connected to the corresponding adsorption roller 5 through wires (not shown in the figure), and the grounding end of the electrostatic generator is connected to the earth through the vibrating conveying trough 4. The bottom of the mounting frame 6 is an open structure, and a ventilation window (not shown in the figure) connected to the suction pipe 12 is opened on the top of the mounting frame. In order to prevent the static electricity on the adsorption roller 5 from disappearing, the surface of each adsorption roller 5 is covered with an insulating layer (not shown in the figure).

[0020] In order to prevent the hemp fibers from being entangled on the adsorption rollers 5 , a scraper 3 is fixed in the mounting frame 6 so as to contact the insulating layer of each adsorption roller 5 .

[0021] In order to ensure that the negative pressure is evenly distributed at various locations in the mounting frame 6 , the ventilation window is connected to the air suction pipe 12 via a trumpet-shaped air guide cover 10 .

[0022] In order to prevent the tobacco leaves from piling up in the vibrating conveying trough 4, a plowshare-shaped material leveling plate 7 extending downward into the vibrating conveying trough 4 and arranged in the opposite direction of the conveying direction is fixed on the gantry 1. The tobacco leaves in the vibrating conveying trough 4 can be dispersed and thinned by the material leveling plate.

[0023] Since the drying degree of each batch of tobacco leaves is not exactly the same, the electrostatic adsorption force of the adsorption roller 5 on the hemp shreds is also different. In order to adjust and control the electrostatic adsorption force and the negative pressure adsorption force, the mounting frame 6 is fixed to the gantry 1 through a first adjustment device. The first adjustment device is composed of two inverted concave-shaped hangers 9 fixed to the mounting frame 6, two first adjustment screws 13 fixed to each hanger 9 and passing upward through the gantry 1, and first locking nuts (not shown in the figure) fixed to each first adjustment screw 13.

[0024] Similarly, in order to adapt to tobacco leaves of different drying degrees and ensure that the tobacco leaves are evenly dispersed, the material distribution plate 7 is fixed to the gantry 1 through a second adjustment device. The second adjustment device is composed of two second adjustment screws 8 fixed to the material distribution plate 7 and passing upward through the gantry 1, and a second locking nut (not shown in the figure) fixed to each second adjustment screw 8.

Claims

1. A tobacco leaf electrostatic negative pressure impurity removal device, comprising an electrostatic adsorption device fixed above a vibrating conveying trough through a gantry; characterized in that: The electrostatic adsorption device comprises a mounting frame (6) fixed on a gantry (1) and having a rectangular box-shaped structure, a plurality of adsorption rollers (5) arranged in the mounting frame along the conveying direction, a motor (11) driving each adsorption roller (5) to rotate via a transmission device (2), and an electrostatic generator (14) electrically connected to each adsorption roller (5); a ventilation window connected to a suction pipe (12) is provided on the top of the mounting frame (6), and the surface of each adsorption roller (5) is coated with an insulating layer.

2. The tobacco leaf electrostatic negative pressure impurity removal device according to claim 1, characterized in that: A scraper (3) in contact with the insulating layer of the adsorption roller (5) is fixed in the mounting frame (6).

3. The tobacco leaf electrostatic negative pressure impurity removal device according to claim 1, characterized in that: The ventilation window is connected to the air suction pipe (12) via a trumpet-shaped air guide cover (10).

4. The tobacco leaf electrostatic negative pressure impurity removal device according to claim 1, characterized in that: A ploughshare-shaped material leveling plate (7) is fixed on the gantry (1) and extends downward into the vibrating conveying trough (4) and is arranged in the opposite direction to the conveying direction.

5. The tobacco leaf electrostatic negative pressure impurity removal device according to any one of claims 1 to 4, characterized in that: The mounting frame (6) is fixed to the gantry (1) via a first adjusting device, the first adjusting device comprising two inverted concave-shaped hangers (9) fixed to the mounting frame (6), two first adjusting screws (13) fixed to each hanger (9) and passing upward through the gantry (1), and a first locking nut fixed to each first adjusting screw (13).

6. The tobacco leaf electrostatic negative pressure impurity removal device according to claim 5, characterized in that: The material balancing plate (7) is fixed to the gantry (1) via a second adjusting device, wherein the second adjusting device is composed of two second adjusting screws (8) fixed to the material balancing plate (7) and passing upward through the gantry (1), and second locking nuts fixed to the second adjusting screws (8).

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