CN110479610B - Screening device based on control of tobacco shred length of fine cigarettes - Google Patents

Abstract

The present invention relates to a screening device based on the control of the length of tobacco shreds of thin cigarettes, comprising a power source, a transmission mechanism, and a plurality of equally spaced movable rollers driven by the power source and the transmission mechanism and rotating synchronously, wherein the movable roller is provided with a picking knife arranged along its axial direction and evenly spaced, each picking knife comprising a plurality of blades for moving tobacco shreds and a fixed disk fixed on the movable roller, the positions of the picking knives on adjacent movable rollers are staggered, the blades of the picking knives on each movable roller extend into the gap formed by two adjacent blades on the adjacent movable roller, forming an interlaced and staggered structure with the blades on the adjacent movable rollers, and the same spacing is set between the two ends of the blades and the adjacent movable rollers. The screening device of the present invention realizes the selective screening of tobacco shreds during the transmission of tobacco shreds, and the filaments in the tobacco shreds are flexibly and selectively screened, so as to prepare for the filaments to be cut short, thereby improving the uniformity of the tobacco shred structure of thin cigarettes, enhancing the applicability of tobacco shreds of thin cigarettes, and improving the overall quality of thin cigarette rolling.

Description

A screening device based on length control of slim cigarette shreds

Technical Field

The invention belongs to the technical field of tobacco processing, and in particular relates to a screening device based on controlling the length of thin cigarette shreds.

Background Art

Slim cigarettes generally refer to cigarettes with a standard design value of (17.0±1.0) mm for the circumference of the cigarette. Compared with conventional cigarettes, the properties of slim cigarettes have changed significantly. In recent years, the production and sales of slim cigarettes in my country have increased significantly year by year, and products with slim cigarettes as the main body have become a new driving force for the development of the tobacco industry. The equipment and process technology of slim cigarettes in the industry are mainly aimed at improving the rolling and packaging equipment. At present, there are common quality problems in the processing of slim cigarettes in the tobacco industry, such as large fluctuations in the weight and draw resistance of cigarettes, uneven distribution of cigarette density, and obvious burning cone head drop. This is mainly because the structure of thin cigarette tobacco is one of the important factors of the physical index of cigarettes - stability. However, during the processing of slim cigarettes, the structure of tobacco is uneven, and super-long filaments and long filaments are entangled, resulting in a high rate of long filaments. At the same time, the uneven structure of thin cigarette tobacco also has a great impact on the comprehensive quality of thin cigarette rolling and the efficiency of equipment operation. Therefore, by adding a reliable tobacco screen length and short cutting equipment after the leaf shreds are dried, the distribution of the tobacco structure of thin cigarettes can be flexibly improved, and the overall quality of thin cigarettes can be improved.

Most of the tobacco transportation equipment is flap transportation or conveyor belt transportation. Flap transportation will cause some tobacco to get stuck in the flap and then fall into the non-transmission area, resulting in reduced tobacco transportation efficiency. Conveyor belt transportation is not suitable for high-angle transportation due to the gravity of the tobacco itself. In addition, the above transportation methods cannot achieve tobacco screening, which is not conducive to improving the tobacco structure.

When the cutting conditions are certain, the wrinkles of the filaments after cutting and the entanglement of the leaf shreds after drying will lead to irregular shapes of the tobacco, which will affect the structure of the tobacco after shredding. Generally speaking, the weight of the filaments in the tobacco of slim cigarettes accounts for about 70%-75% of the total material, and the proportion of filaments in the tobacco is relatively high. On the other hand, the high filament rate and poor structural uniformity have an increasingly obvious impact on the quality indicators of the single weight deviation, hardness, draw resistance, end filament amount of the slim cigarettes, and the operating efficiency of the cigarette making machine equipment.

Screening out the extra-long filaments and long filaments in the slim cigarette shreds and cutting them short can better meet the needs of slim cigarette rolling. At present, there is a lack of ideal equipment for online screening of shredded tobacco in the slim cigarette processing process. The existing screening machines are all based on the screening process of conventional cigarette sheet processing, and there are problems such as poor screening, leakage, and hole blockage.

Summary of the invention

To solve the above problems, the present invention provides a screening device based on length control of thin cigarette tobacco, which can selectively screen the tobacco during transportation, so that the long filaments in the tobacco can be flexibly and selectively cut short, while reducing breakage during transportation.

To achieve the above object, the technical solution of the present invention is as follows:

A screening device based on controlling the length of tobacco shreds for thin cigarettes comprises a power source 1 and a transmission mechanism 2. The output end of the power source 1 is connected to the transmission mechanism 2, and the transmission mechanism 2 is connected to and synchronously drives a plurality of moving rollers 3 with the same spacing. The moving rollers 3 are provided with picking knives 4 arranged along their axial direction and evenly spaced. Each picking knives 4 comprises a plurality of blades 41 for moving tobacco shreds and a fixed disk 42 fixed on the moving roller 3. The blades 41 are evenly distributed on the fixed disk 42. Each picking knives 4 have the same angle when installed. The positions of the picking knives 4 between adjacent moving rollers 3 are staggered. Each blade 41 extends into a gap formed by two adjacent blades 41 on the adjacent moving roller 3, forming an interlaced and staggered structure with the blades 41 on the adjacent moving roller 3. The same spacing is set between the two ends of the blade 41 and the adjacent moving roller 3, and the moving roller 3 drives the picking knives 4 to rotate.

In the present technical solution, further, the shape of the blade 41 on the picking knife 4 is an isosceles trapezoid and the lower base is connected to the fixed plate 42.

Furthermore, the blade 41 and the fixing plate 42 are an integrally formed structure, and a mounting hole 43 is provided in the middle of the fixing plate 42 .

Furthermore, the included angle between the hypotenuse and the top edge of the blade 41 is 105°.

Furthermore, the length of the blade 41 is less than the set length of the screened tobacco, the length of the blade 41 is twice the distance between adjacent blades 41 on adjacent moving rollers 3, and the distance between the two ends of the blade 41 and the adjacent moving rollers 3 is 2-3 mm.

Furthermore, the picking knife 4 includes eight blades 41, the length of the blades 41 is 20-22 mm, and the distance between adjacent picking knives 4 on the same movable roller 3 is 25 mm.

Furthermore, shaft sleeves are provided between adjacent picking knives 4 on the movable roller 3, and the shaft sleeves press and fix the picking knives 4 against each other.

Furthermore, fixed plates 5 parallel to each other are vertically arranged at both ends of the movable roller 3 , and the movable roller 3 is movably connected to the fixed plates 5 .

Furthermore, the power source 1 is installed on the fixing plate 5 , and the power source 1 is a motor 11 .

Furthermore, the transmission mechanism 2 includes a reducer 21 connected to the motor 11 for adjusting the speed, sprockets 22 installed at both ends of the movable roller 3, and a chain 23 connecting the sprockets 22, and the chain 23 is connected to the power output end of the reducer 21.

Beneficial Effects

The present invention provides a screening device based on the length control of thin cigarette tobacco filaments, which can screen the filaments in the processing of thin cigarette tobacco filaments. When in use, the staggered picks on adjacent moving rollers always form a gap of a set size during the rotation process, and the tobacco filaments on the conveying surface formed by the picks can be completely screened according to the set gap size, so as to prevent the target tobacco filaments from falling under the conveying device through the gap. Multiple moving rollers and the picks installed on the moving rollers can realize the screening and transportation functions of tobacco filaments. The axial gap of the picks can be used to screen tobacco filaments with a length less than the distance between two adjacent moving rollers, and fall into the conveying mechanism at the bottom of the moving roller; tobacco filaments with a length greater than the distance between two adjacent moving rollers are moved to the next moving roller as the moving roller rotates, and finally sent to the slitting machine.

The screening device of the present invention is used after the tobacco shreds are dried, and selective screening of the tobacco shreds is achieved during the tobacco shreds transmission process. After the long filaments in the tobacco shreds are flexibly and selectively screened, preparations are made for the long filaments in the tobacco shreds to be cut short, thereby improving the uniformity of the tobacco shreds structure of slim cigarettes, enhancing the applicability of the tobacco shreds of slim cigarettes, and improving the overall quality of slim cigarette rolling.

The present invention only uses a plurality of moving rollers and a picking knife installed on the moving roller to realize the screening and transportation functions of tobacco shreds. The axial gap of the picking knife can be adjusted, so that the length of tobacco shreds can be flexibly and selectively regulated, and finally the filaments are sent to the slitting machine. Compared with the traditional vibration groove screen, through-hole screen and fixed-length shreds, the efficiency of filament screening in tobacco shreds can be improved, and the crushing in the tobacco shreds processing process can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further described below in conjunction with the accompanying drawings and embodiments.

FIG. 1 is a top view of a screening device for controlling the length of shredded tobacco of slim cigarettes according to the present invention.

FIG. 2 is an enlarged view of the top view A of the screening device for controlling the length of slim cigarette tobacco according to the present invention.

FIG. 3 is a side view of the screening device for controlling the length of thin cigarette tobacco according to the present invention.

FIG. 4 is a schematic diagram showing the cooperation of the pick knives on two adjacent movable rollers of the present invention.

FIG. 5 is a schematic diagram of the connection structure of the power source, the transmission mechanism and the movable roller of the present invention.

In the attached figure:

1. Power source 11. Motor 2. Transmission mechanism 21. Reducer

22. Sprocket 23. Chain 3. Moving roller 4. Pick knife

41. Blade 42. Fixing plate 43. Mounting hole 5. Fixing plate

6. Tooth Valley

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

Example:

As shown in Figures 1, 2 and 3, a screening device based on the control of the length of tobacco shreds for thin cigarettes comprises a power source 1 and a transmission mechanism 2. The output end of the power source 1 is connected to the transmission mechanism 2, and the transmission mechanism 2 is connected to and synchronously drives a plurality of movable rollers 3 with the same spacing. The movable rollers 3 are provided with picking knives 4 arranged along their axial direction and evenly spaced. Each picking knives 4 comprises a plurality of blades 41 for moving tobacco shreds and a fixed disk 42 fixed on the movable roller 3. The blades 41 are evenly distributed on the fixed disk 42. Each picking knives 4 have the same angle when installed. The positions of the picking knives 4 between adjacent movable rollers 3 are staggered. Each blade 41 extends into a gap formed by two adjacent blades 41 on the adjacent movable roller 3, forming an interlaced and staggered structure with the blades 41 on the adjacent movable roller 3. The same spacing is set between the two ends of the blade 41 and the adjacent movable rollers 3, and the movable rollers 3 drive the picking knives 4 to rotate.

The blade 41 on the lifting knife 4 is in the shape of an isosceles trapezoid and the lower base is connected to the fixing plate 42 .

The blade 41 and the fixed plate 42 are integrally formed. A mounting hole 43 is provided in the middle of the fixed plate 42. The mounting hole 43 is a circular hole. The movable roller 3 is a shaft-like part. A bearing for reducing friction is provided in the circular hole.

The overall thickness of the picking knife 4 is not easy to be too thick. In this embodiment, 3-4 mm steel is selected to make it. Each picking knife 4 is mounted on the movable roller 3 through the mounting hole 43. Adjacent picking knives 4 can be fixedly arranged by a shaft sleeve or by a tightening nut.

The included angle between the hypotenuse and the top edge of the blade 41 is 105°.

The length of the blade 41 is less than the set length of the screened tobacco, and the length of the blade 41 is twice the distance between adjacent blades 41 on adjacent moving rollers 3. The distance between the two ends of the blade 41 and the adjacent moving rollers 3 is 2-3 mm.

The picking knife 4 includes eight blades 41, the length of the blades 41 is 20-22 mm, and the distance between adjacent picking knives 4 on the same movable roller 3 is 25 mm.

A shaft sleeve is arranged between adjacent picking knives 4 on the movable roller 3, and the shaft sleeve presses and fixes the picking knives 4 against each other.

Two ends of the movable roller 3 are vertically provided with fixed plates 5 parallel to each other, and the movable roller 3 is movably connected to the fixed plates 5 .

The power source 1 is installed on the fixing plate 5 , and the power source 1 is a motor 11 .

As shown in FIG5 , a transmission mechanism 2 for transmitting power is provided on one end of the movable roller 3 extending out of the fixed plate 5. The transmission mechanism 2 includes a reducer 21 connected to the motor 11 for adjusting the speed, sprockets 22 installed at both ends of the movable roller 3, and chains 23 connecting the sprockets 22. The chain 23 is connected to the power output end of the reducer 21, and the sprockets 22 are connected to the chain 23 to ensure that their linear speeds are equal. A protective shell can be provided on the outside of the transmission mechanism 2. Grease needs to be applied to the transmission mechanism 2 for lubrication, and the protective shell can prevent the grease from splashing.

In this embodiment, the transmission method adopts chain transmission. In addition, other mechanical power transmission methods can also be used. In order to realize the transportation of tobacco in this technical solution, the transmission mechanism needs to be a synchronous transmission mechanism, such as a synchronous sprocket, a synchronous belt, or a synchronous gear. The transmission structure can be set on the inner side or the outer side of the fixed plate 5 according to the actual processing situation; the side where the movable roller 3 extends out of the fixed plate 5 is provided with a power source 1 for providing power for the device. The power source 1 is a motor 11. The output end of the motor 11 is connected to the reducer 21. The output end of the reducer 21 is connected to the transmission mechanism 2 to provide power for the device.

As shown in FIG4 , during the transmission process of adjacent pick knives 4, when the tooth valleys 7 formed between adjacent pick knives 4 are opposite to each other, there are still corresponding parts between the blades 41 near the tooth valleys 7, that is, the gap formed between adjacent blades 41 on different moving rollers 3 always exists and remains unchanged, and the gap is used to screen tobacco of a set size.

In this embodiment, 25 mm square tobacco shreds need to be screened out and transported to the shredding place with the picker. The length of the blade 41 on each picker 4 is set to 22 mm, the spacing between the two ends of the blade 41 and the adjacent moving roller 3 is 3 mm, the distance between each parallel adjacent picker is 25 mm, and the overall thickness of the picker 4 is 3 mm. At this time, the gap formed by the staggered blades has a length dimension of 25 mm and a width dimension of 11 mm. When the blades rotate, the gap always remains 25*11 mm, and all 25 mm square tobacco shreds are transported to the shredding place.

The movable roller 3 and the picking knife 4 are used in coordination. When the clumped tobacco just enters the conveying area on the movable roller 3, the picking knife 4 will loosen the clumped tobacco and convey it to the next movable roller 3; the shorter tobacco in the loosened tobacco will fall into the transportation device below through the gap between the picking knives 4, and the longer tobacco will continue to be conveyed to the selection area at the rear through the rotation of the movable roller 3, until it falls into the long-filament cutting device for secondary processing; if the rotation speed of the movable roller 3 is too fast, the edge blade of the picking knife 4 on the movable roller 3 can directly cut the tobacco.

The existence of the gap is used to select tobacco of target length. Tobacco shorter than the target length will fall through the gap onto the lower transport device and directly enter the conveying vibration trough of the production line.

The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (5)

1. Screening device based on thin cigarette pipe tobacco length control, its characterized in that: the device comprises a power source (1) and a transmission mechanism (2), wherein the output end of the power source (1) is connected with the transmission mechanism (2), and the transmission mechanism (2) is connected with and synchronously drives a plurality of movable rollers (3) with the same interval; the movable rollers (3) are provided with picking blades (4) which are axially arranged and uniformly arranged at intervals, each picking blade (4) comprises a plurality of blades (41) for poking cut tobacco and a fixed disc (42) fixed on each movable roller (3), the blades (41) are uniformly distributed on the fixed disc (42), the angle of each picking blade (4) during installation is the same, the positions of the picking blades (4) between adjacent movable rollers (3) are staggered, and each blade (41) extends into a gap formed by two adjacent blades (41) on each adjacent movable roller (3) and forms a staggered structure with the blades (41) on each adjacent movable roller (3); the same interval is arranged between two ends of the blade (41) and the adjacent movable roller (3), and the movable roller (3) drives the picking knife (4) to rotate; the length of the blade (41) is smaller than the length of the set screening tobacco shreds; the distance between two ends of the blade (41) and the adjacent movable roller (3) is 2-3mm, the length of the blade (41) is 20-22mm, and the distance between the adjacent picking blades (4) on the same movable roller (3) is 25mm; the picking knife (4) comprises eight blades (41), and the included angle between the inclined edges and the top edges of the blades (41) is 105 degrees; a shaft sleeve is arranged between adjacent picking blades (4) on the movable roller (3), and the shaft sleeve compresses and fixes the picking blades (4) mutually; the blades (41) on the picking knife (4) are isosceles trapezoid in shape, and the lower bottom of the blades is connected with the fixed disc (42).

2. The screening apparatus of claim 1, wherein: the blade (41) and the fixed disc (42) are of an integrated structure, and a mounting hole (43) is formed in the middle of the fixed disc (42).

3. The screening apparatus of claim 1, wherein: the two ends of the movable roller (3) are vertically provided with fixing plates (5) which are parallel to each other, and the movable roller (3) is movably connected with the fixing plates (5).

4. A screening apparatus according to claim 3, wherein: the power source (1) is arranged on the fixed plate (5), and the power source (1) is a motor (11).

5. The screening apparatus of claim 4, wherein: the transmission mechanism (2) comprises a speed reducer (21) connected with the motor (11) and used for adjusting the speed, chain wheels (22) arranged at two ends of the movable roller (3), and chains (23) connected with the chain wheels, wherein the chains (23) are connected with the power output end of the speed reducer (21).