CN-118080342-B - Stem and stick separation and tobacco shred recycling device and method for tobacco shred fragments in cigarette working procedure

CN118080342BCN 118080342 BCN118080342 BCN 118080342BCN-118080342-B

Abstract

The invention provides a stem and stick separation and cut tobacco recovery device and method of cut tobacco scraps in a cigarette procedure, the cut tobacco scraps are input into a first-stage vibrating screen by a lifting machine, the rigid puncture type stem sticks are captured by an orthogonal curved surface sieve plate and a lattice alternating cylindrical sieve hole, and the separation of tobacco powder and stem sticks with the diameter smaller than d1 is completed. The residual materials are input into a secondary vibrating screen, hard stems with the length dimension d2 and poor plasticity are controlled and separated by a curve guide bar, a size control screen plate, a screening hole, a separation curved surface and the like, and the cut tobacco with good flexibility sequentially passes through the screening hole, the separation curved surface and the like and is finally input into a cut tobacco collecting box. The invention has high loosening force, screening efficiency and low breakage rate for the tobacco shred fragments, has more accurate separation capability for stems in the tobacco shred fragments, and improves the recovery rate and quality of the tobacco shred.

Inventors

LI CUNHUA
YU CHENGDAN
HE LINTAO
SHI XUDONG
GUO YONG
CHEN LIYUAN
LUO KAICAI
HU MINGHUI
LIU DONGCAI
QI YUEDONG
YANG SEN
MA CHANGLEI
JIN JIAN
YANG YANPING

Assignees

红塔烟草(集团)有限责任公司

Dates

Publication Date: 20260505
Application Date: 20240304

Claims (10)

1. The stem and cut tobacco separating and recycling device for cut tobacco scraps in the cigarette procedure is characterized by comprising a primary vibrating screen (3) and a secondary vibrating screen (6), wherein a curved screen plate (4) is arranged in the primary vibrating screen (3), and a size control screen plate (8) is arranged in the secondary vibrating screen (6); The upper surface of the curved surface sieve plate (4) is a space curved surface constructed by orthogonal sine basis functions, the length L direction of directional movement of materials is set as an x axis, the width B direction vertical to the x axis is set as a z axis, the direction vertical to an xz plane is set as a y axis, and the space curved surface is set as Then, in the x-axis section at the origin position of the coordinate system, the space curved surface The upper curve equation is: And space curved surface Coordinates of any point on the table conform to: And Then The standard space surface equation is A plurality of first screening holes (4-1) are formed on the curved screen plate (4), and the first screening holes (4-1) are curved in space perpendicular to the xz plane A cylindrical hole processed on the upper part, the intersection line of the hole and the space curved surface is a continuous three-dimensional space curve C, and the first screening hole (4-1) is positioned on the space curved surface The distribution method is that the light is distributed at equal intervals on each wavelength lambda; The size-control screen plate (8) is characterized in that a plurality of second screening holes (8-1) are formed in the upper surface of the size-control screen plate (8), separation holes (8-7) with the same aperture are connected under the second screening holes (8-1), a plurality of blanking grooves (8-9) which are arranged in parallel and at equal intervals are formed in the lower surface of the size-control screen plate (8), a separation space communicated with the separation holes (8-7) is formed under the separation holes, one side of the separation space is sealed by a separation curved surface (8-8), the other side of the separation space is open and communicated with the blanking grooves (8-9) adjacent to the separation curved surface, the length L1 direction of the size-control screen plate (8) is the directional movement direction of materials, the width B1 direction is perpendicular to the length L1 direction, the second screening holes (8-1) are distributed along a sinusoidal function on the length L1, a plurality of curve guide strips (7) which extend along the L1 direction are mounted on the upper surface of the size-control screen plate (8), and the curve guide strips (7) are located between the two second screening holes (8-1) adjacent to the width B1 direction.
2. A stem and cut tobacco separating and recovering device for cut tobacco scraps in a cigarette procedure according to claim 1, wherein the diameter of the separating hole (8-7) is d2, and an arc with a radius equal to d2 is formed on the separating curved surface (8-8) by taking any point on the circumferential line of the separating hole (8-7) as a circle center, and the separating curved surface (8-8) is a rotating curved surface.
3. A stem and cut tobacco separating and recovering device for cut tobacco scraps in a cigarette procedure according to claim 2, wherein the second screening holes (8-1) are distributed along the length L1 according to a sinusoidal function, and each second screening hole (8-1) is centered on the sinusoidal curve, and the equation is: The second screening holes (8-1) on a sinusoidal curve in the direction of width B1 are sequentially shifted with a wavelength of λ=2pi.
4. A stem and cut tobacco recycling apparatus for cut tobacco scraps in a cigarette procedure according to claim 3, wherein the curved guide bar (7) is designed in a sinusoidal manner, and the equation is: The wavelength is λ=2pi.
5. A stem and cut tobacco recycling apparatus for cut tobacco scraps in a cigarette procedure according to claim 4, wherein the diameter of the first screening hole (4-1) is d1, d1 is smaller than d2, the height h of the first screening hole (4-1) is not smaller than 3mm, and the minimum h value is present in the trough.
6. A stem and cut tobacco separating and recovering device for cut tobacco scraps in a cigarette procedure according to claim 5, wherein the blanking groove (8-9) is an open through groove passing through the circumference of the separating hole (8-7) and tangential to the separating curved surface (8-8), the minimum distance from the tangential plane of the blanking groove (8-9) and the separating curved surface (8-8) to the center of the separating hole (8-7) is x, and the x range is: 。
7. A stem and cut tobacco separating and recovering device for cut tobacco scraps in a cigarette procedure according to claim 6, wherein the length L1 of the size control screen plate (8) is designed according to integer multiples of the wavelength λ, and the design length L1 of the size control screen plate (8) is within 25 wavelengths λ.
8. A stem and cut tobacco recycling apparatus for cut tobacco scraps in a cigarette procedure according to claim 7, wherein, at the opening of the three-dimensional space curve C of the first screening hole (4-1) on the curved surface of the curved surface screen plate (4) and at the edge of the outlet of the blanking slot (8-9) on the size control screen plate (8), manual cut hair barb or chamfering treatment is performed to prevent cut tobacco from being broken or jammed.
9. The stem and tobacco shred recycling device for tobacco shred scraps in the cigarette procedure according to claim 8, further comprising a lifting machine (2), a conveying plate (5), a stem label collecting box (9), a stem label discharging groove (10), a tobacco shred discharging groove (11), a tobacco shred collecting box (12), a tobacco shred stem label collecting cylinder (13) and a tobacco shred discharging groove (14), wherein the lifting machine (2) is connected with the front end of the primary vibrating screen (3), the tail end of the primary vibrating screen (3) is connected with the front end of the secondary vibrating screen (6) through the conveying plate (5), the tobacco shred discharging groove (14) is arranged below the curved surface screen plate (4), the tobacco shred stem label collecting cylinder (13) is arranged below an outlet of the tobacco shred discharging groove (14), the tobacco shred discharging groove (11) is arranged below the size-controlled (8), the collecting box (12) is arranged below the outlet of the tobacco shred discharging groove (11), the tail end of the secondary vibrating screen (3) is connected with the tobacco shred label collecting groove (10) below the curved surface screen plate (4).
10. A method for separating cut tobacco and recovering cut tobacco in a cigarette procedure is characterized in that the device for separating cut tobacco and recovering cut tobacco in the cigarette procedure is adopted, The tobacco shred scraps are input into a primary vibrating screen (3) through a lifting machine (2), hard sticks with the length dimension larger than d2 are screened out through a curved screen plate (4) and a cylindrical first screening hole (4-1), the sticks with the diameter dimension smaller than d1 are screened out through a three-dimensional curve hole C on a curved surface, the sticks with the diameter dimension smaller than d1 are input into a tobacco stick collecting cylinder (13) through a tobacco stick discharging groove (14), the residual materials are input into a secondary vibrating screen (6) through screening conveying, the hard sticks with the length dimension smaller than the diameter dimension are screened out through a curve guide bar (7), a size control screen plate (8), a second screening hole (8-1), a separating hole (8-7), a separating curved surface (8-8) and a blanking groove (8-9), and the plastic and flexible tobacco shreds are sequentially input into a tobacco shred collecting box (9) through the second screening hole (8-1), the separating hole (8-7), the separating curved surface (8-9) and the blanking groove (11).

Description

Stem and stick separation and tobacco shred recycling device and method for tobacco shred fragments in cigarette working procedure Technical Field The invention relates to the technical field of cigarette production, is applied to stem and stick separation and tobacco shred recovery in tobacco shred fragments, and in particular relates to a stem and stick separation and tobacco shred recovery device and method for tobacco shred fragments in a cigarette procedure. Background In the tobacco processing industry, "stem sticks" are a very important term, and their research has been accompanied by the development of cigarette technology. In general, the stem label refers to a stem similar to a toothpick in the tobacco shred, and the unexpanded or expanded effect does not meet the requirements of the cigarette working procedure, or the poor physical characteristics such as size, hardness or shape of the stem label have negative effects on the cigarette working procedure or the quality of the cigarette, for example, the uneven burning, uneven burning end surface, flowering and bursting and the like of the tobacco shred can be caused by too high content of the stem label in the tobacco shred or poor characteristics of the stem label in the tobacco shred, or the hard stem label in the cigarette rolling working procedure can puncture and crack the cigarette paper and the like, so that the quality of the cigarette such as sensory suction and the like can be directly influenced. The stem label is derived from the fact that tobacco leaves cannot remove tobacco stems completely in threshing and redrying, namely the tobacco leaves contain stems, so that the tobacco leaves inevitably generate the stem label in tobacco shred production, and the stem label is formed by blending the stem shreds which do not meet the technical requirements into finished tobacco shreds in the process of producing the stem shreds by utilizing the tobacco stems, so that the stem label separation purpose is to qualitatively separate the stem shreds which have negative influence on the quality of cigarettes. Therefore, from the viewpoint of describing the "stem" attribute, the "stem" separation is a difficult problem. Currently, a stem and stick separation procedure is set in the pre-procedure of the cigarette making machine for making cigarettes, and the basic principle is that harmful stem and stick impurities are separated out through a winnowing technology, and the stem and stick impurities selected by wind are collectively called as cut tobacco scraps. The large cigarette enterprises generate about 4-5 t of tobacco shred fragments containing the stem sticks every day, and the weight difference and the suspension speed difference between partial tobacco shreds and the stem sticks are not obvious, so the tobacco shred fragments contain not only the stem sticks but also a large amount of tobacco shreds. The ratio of the cut tobacco in the cut tobacco scraps is difficult to have accurate parameters, but is more than five to six, so that the cut tobacco is very necessary to be recovered. In view of the above problems, the present inventors have finally achieved the present invention through long-time studies and practices. Disclosure of Invention In order to solve the technical problems, the invention provides the stem and stick separation and tobacco shred recycling device and method for the tobacco shred fragments in the cigarette procedure, which can improve the stem and stick separation accuracy, tobacco shred quality and recycling rate in the tobacco shred fragments, save expensive tobacco shred cost and improve the production quality of cigarettes. The invention adopts the technical scheme that: on one hand, the stem and stick separation and cut tobacco recovery device for cut tobacco scraps in the cigarette procedure comprises a primary vibrating screen and a secondary vibrating screen, wherein a curved surface screen plate is arranged in the primary vibrating screen, and a size control screen plate is arranged in the secondary vibrating screen; The upper surface of the curved surface sieve plate is a space curved surface constructed by an orthogonal sine basis function, the length L direction of directional movement of a material is set to be an x axis, the width B direction vertical to the x axis is set to be a z axis, the direction vertical to an xz plane is set to be a y axis, the space curved surface is set to be y=f (x, z), then in the x axis section at the origin position of a coordinate system, a curve equation on the space curved surface y=f (x, z) is set to be y=cos (x), and the coordinates of any point on the space curved surface y=f (x, z) accord with x=sin (z) and y=cos (x), then the standard space curved surface equation of y=f (x, z) =cos (x-sin (z)); The upper surface of the size-control sieve plate is provided with a plurality of second sieving holes, separating holes with the same aperture are connected under the second siev