Roller screen and a purification screen for pre-treatment of waste cigarette before disposal

Abstract

This invention proposes a roller screen, comprising a first screen with a larger diameter and a second screen with a smaller diameter, forming a structure where the outer edge of the first screen extends beyond the second screen and is close to the outer periphery of an adjacent roller or adjacent roller. Multiple second screens are arranged in an array between the first screens. Longitudinal screen holes, co-directional with the roller axis, are formed between adjacent first screens on the same roller and between the outer edge of the second roller and adjacent rollers. Transverse screen holes, matching the diameter of strip-shaped materials, are formed between adjacent screens on the same roller. This invention employs a method of alternating longitudinal and transverse screen holes, significantly improving screening efficiency. Furthermore, the screening dimensions of the formed longitudinal and transverse screen holes remain unchanged during roller movement. The dimensions of the longitudinal and transverse screen holes can be effectively and conveniently controlled and adjusted by setting the screen plate gap and the screen plate diameter.

Description

Technical Field

[0001] This invention relates to roller screen structures, and more particularly to a roller screen and a purification screen for waste cigarette treatment. Background Technology

[0002] The main method for turning waste cigarettes into valuable resources is to use a waste cigarette processing machine to remove the tobacco from the waste cigarettes. Currently, there are roughly three types of waste cigarette processing methods both domestically and internationally: one is steam wetting and pulverizing, the second is compressed air blowing after cigarette processing, and the third is directional full and half cutting of cigarettes.

[0003] Regardless of the processing method, the problem of purifying waste cigarettes remains. This is because waste cigarettes are mainly generated due to malfunctions in the cigarette rolling and packaging equipment, and there are many reasons for these malfunctions. Waste paper, waste sticks, waste tape, cigarette wrapping paper, connected cigarettes, broken cigarettes, bent cigarettes, bullet-shaped cigarettes, and cigarettes that have run away from their packs coexist with standard cigarettes.

[0004] Currently, the methods for removing impurities from waste cigarettes are as follows: large foreign objects are manually removed, and small foreign objects are screened by pouring waste cigarettes into a tank with sieve holes. After the smoke is screened out, the cigarettes enter the waste cigarette processing machine. Some companies also use large-scale air separation to remove impurities before the cigarettes enter the waste cigarette processing machine. However, air separation is noisy, the equipment occupies a large area, and it is costly, so the effect is not ideal.

[0005] Roller screens, also known as multi-stage linkage roller screens, equal thickness screens, mud-stone separators, and butterfly screens, are suitable for separating various stone materials. They can classify materials according to different proportions, sizes, and shapes, thereby reducing the load on subsequent sorting equipment. In 2012, our company pioneered the application of roller screens to tobacco sheet and shredded tobacco screening. Due to the unparalleled advantages of roller screens compared to ordinary vibrating screens, they achieved significant success in the tobacco screening field. Cigarettes vary in thickness, length, and shape, and are often mixed with waste paper, trim paper, and waste sticks. Screening them using roller screens presents a challenge, and there is currently no relevant research. Waste cigarette processing requires a pre-treatment purification process, especially for blown tobacco and slicing waste cigarette processing equipment. Pre-treatment purification methods are urgently needed to ensure the quantity and quality of waste cigarette processing. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide a roller screen that solves the problem of ineffective screening or low screening efficiency of traditional screening processes and tools in the field of waste cigarette screening.

[0007] The technical solution includes a frame and a screen frame for mounting rollers, a power source and transmission mechanism for driving the rotation of each roller, and multiple disc-shaped screens mounted on each roller array. The screens are characterized by including a first screen with a larger diameter and a second screen with a smaller diameter, forming a structure where the outer edge of the first screen extends beyond the second screen and is close to the outer periphery of an adjacent roller or adjacent roller, with multiple arrayed second screens arranged between each first screen. Longitudinal screen holes in the same direction as the roller axis are formed between adjacent first screens on the same roller and between the outer edge of the second roller and adjacent rollers. Transverse screen holes matching the diameter of strip-shaped materials are formed between adjacent screens on the same roller. The dimensions of the transverse and longitudinal screen holes do not change when the rollers rotate.

[0008] In the above or some embodiments, the longitudinal screen holes on the same roller are located on the same straight line or on different straight lines.

[0009] In the above or some embodiments, a third screen disk is also included, the diameter of which is smaller than that of the second screen disk. The outer edge of the array formed by the second screen disk on one roller shaft corresponds to the outer edge of the third screen disk at the adjacent roller shaft, forming the edge of the longitudinal screen hole, thus constituting a structure in which the longitudinal screen holes on the same roller shaft are located on different straight lines.

[0010] In view of the problems existing in the screening of waste cigarettes, the purpose of this invention is to propose a purification sieve for waste cigarette processing, so as to solve the problem that traditional screening processes and tools cannot effectively screen or have low screening efficiency in the field of waste cigarette screening.

[0011] The technical solution is a purification screen before waste cigarette treatment, including a roller screen and a linear screen located below the roller screen;

[0012] The roller screen includes a frame and a screen frame for mounting the rollers, as well as a power source and transmission mechanism for driving the rollers to rotate. Each roller array is equipped with multiple disc-shaped screen discs. The screen discs are characterized in that they include a first screen disc with a larger diameter and a second screen disc with a smaller diameter than the first screen disc, forming a structure in which the outer edge of the first screen disc extends beyond the second screen disc and is close to the outer periphery of the adjacent roller or adjacent roller, and a component is installed thereon. Multiple arrayed second screen discs are arranged between each first screen disc. Longitudinal screen holes in the same direction as the roller axis are formed between adjacent first screen discs on the same roller and between the outer edge of the second roller and the adjacent roller. Transverse screen holes matching the diameter of the strip-shaped material are formed between adjacent screen discs on the same roller. The dimensions of the transverse and longitudinal screen holes do not change when the roller rotates.

[0013] The linear screen includes a screen plate located inside the screen box. The screen plate has a plate-like structure. The screen mesh includes multiple arrayed comb teeth. One end of each comb tooth is connected to the screen plate, and the other end of each comb tooth is raised and faces the material flow direction. A strip-shaped interval for screening materials is formed between each comb tooth. The gap between the lower edge of the raised end of each comb tooth and the screen plate is less than or equal to the size of the strip-shaped interval.

[0014] In the above or some embodiments, the longitudinal screen holes on the same roller are located on the same straight line or on different straight lines.

[0015] In the above or some embodiments, a third screen disk is also included, the diameter of which is smaller than that of the second screen disk. The outer edge of the array formed by the second screen disk on one roller shaft corresponds to the outer edge of the third screen disk at the adjacent roller shaft, forming the edge of the longitudinal screen hole, thus constituting a structure in which the longitudinal screen holes on the same roller shaft are located on different straight lines.

[0016] In the above or some embodiments, the comb teeth are formed by multiple comb tooth units, each comb tooth unit is composed of multiple adjacent comb teeth arranged together, and a gap formed by a sieve plate is left between each comb tooth unit.

[0017] In the above or some embodiments, the linear screen is a multi-layer linear screen, and the adjacent screen boxes are connected by an elastic vibration support in the shape of ">". The elastic vibration support includes an upper elastic joint, a lower elastic joint, and an intermediate elastic joint. The upper and lower elastic structures are connected to the corresponding screen boxes, and the intermediate elastic structure is connected to the frame located between the upper and lower screen boxes.

[0018] In the above or some embodiments, the screen frame includes side plates located at both ends of the roller shaft and an end panel located at the feed position of the roller screen. The end panel and the side plates form the mounting structure of the roller shaft, and a discharge plate is provided at the other end of the screen frame, which is inclinedly arranged below the roller shaft.

[0019] In the above or some embodiments, a longitudinal beam is fixedly connected to the outer periphery of the screen frame. The upper end face of the longitudinal beam is installed on the bearing seat that rotates with each of the rollers. The roller chain transmission mechanism forms a transmission in the same direction. The frame also includes a column fixedly connected to the longitudinal beam. The middle part of the column is fixedly connected to the frame through a connecting arm. The frame also includes a crossbeam located between the columns.

[0020] The roller screen used in this invention overcomes the problem of uniform screen hole orientation in traditional roller screens by employing a method of alternating longitudinal and transverse screen holes. This significantly improves screening efficiency, and the screening size of the longitudinal and transverse screen holes remains unchanged during roller movement. Furthermore, the size of the longitudinal and transverse screen holes can be effectively and conveniently controlled by adjusting the screen plate gap and screen plate diameter, adapting to variations in cigarette thickness and length. Even bent cigarettes in the waste can still be screened through the screen holes. The lower linear screen, with its comb-shaped teeth, transforms planar holes into three-dimensional screen holes, allowing waste cigarettes to pass through smoothly as they flow uphill on the screen surface. When foreign objects smaller than waste cigarettes enter the screen holes, the material cannot adhere to the screen plate due to the breakage and upward tilt of one end of the screen hole partition. The original vibration force of the linear screen causes the comb teeth that make up the screen holes to break the material and resonate with the screen plate, resulting in high screening efficiency, self-cleaning, and no clogging. On the other hand, the elastic vibration support is ">" shaped, with the upper and lower elastic structures connected to the corresponding screen boxes, and the middle elastic structure connected to the frame located between the upper and lower screen boxes. This forms a structure where only one screen box needs to be driven to vibrate, which can drive the other screen box through the elastic vibration support, avoiding the structure of traditional elastic vibration support that requires two vibration sources for driving. Attached Figure Description

[0021] Figure 1 This is a front view of the roller screen in this invention.

[0022] Figure 2 for Figure 1 Top view.

[0023] Figure 3 This is a three-dimensional schematic diagram of the purification screen before waste cigarette treatment according to the present invention.

[0024] Figure 4 for Figure 1 Front view of the purification screen before the treatment of waste cigarettes.

[0025] Figure 5 for Figure 4 Top view.

[0026] Figure 6 This is a three-dimensional schematic diagram of the sieve plate in this invention. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] The roller screen includes a frame 300 for mounting rollers 101, a screen frame 102, a power source and transmission mechanism for driving each roller 101 to rotate, and multiple disc-shaped screen discs are mounted on each roller 101 array. The outer periphery of the screen discs is provided with tooth-like structures for moving materials.

[0030] The screen frame 102 includes side plates 301 located at both ends of the roller shaft 101 and an end panel 302 located at the feed position of the roller screen. The end panel 302 and the side plates 301 form the mounting structure of the roller shaft 101. The main body of each roller shaft 101 is located between the two side plates 301. Multiple screen discs are fixedly or detachably fixedly connected at each roller shaft 101. The other end of the screen frame 102 is provided with a discharge plate 303 that is inclinedly arranged below the roller shaft 101.

[0031] In the above or some embodiments, a longitudinal beam 304 made of, but not limited to, channel steel is fixedly connected to the outer periphery of the screen frame 102. The upper end face of the longitudinal beam 304 is mounted on the bearing seat 305 that is rotatably engaged with each of the roller shafts 101. The roller shafts 101 are driven by a chain drive mechanism in the same direction. The roller shafts 101 exposed outside the side plate 301 are rotatably connected to the bearing seat 305. At the same time, each shaft end is connected to a sprocket. Each sprocket is driven by a chain. One of the sprockets at the end is connected to the roller shaft 101 drive motor through a chain or belt drive. The roller shaft 101 drive motor is fixedly installed at the mounting bracket at the extension of the right longitudinal beam 304.

[0032] To control the dimensions of the crisscrossing longitudinal and transverse screen holes formed by the screen discs, adjustable screen hole orientation and size are achieved through different screen disc diameters and gaps between adjacent screen discs. For an adjustable screen disc structure, the screen disc is a disc or near-disc-shaped structure, including a central hole for fitting onto the roller shaft. The screen disc can be connected to the roller shaft via a key or a press-fit structure using a sleeve and a clamping nut. Therefore, in the above or some embodiments, the screen disc includes a first screen disc 103 with a larger diameter and a second screen disc 104 with a smaller diameter than the first screen disc 103, forming a structure in which the outer edge of the first screen disc 103 extends beyond the second screen disc 104 and is close to the outer periphery of the adjacent roller 101 or the adjacent roller 101 to install components. Multiple arrayed second screen discs 104 are arranged between each of the first screen discs 103. Between adjacent first screen discs 103 on the same roller 101 and between the outer edge of the second roller 101 and the adjacent roller 101, longitudinal screen holes 105 are formed in the same direction as the axial direction of the roller 101. Transverse screen holes 106 matching the diameter of the strip-shaped material are formed between adjacent screen discs on the same roller 101. The dimensions of the transverse screen holes 106 and the longitudinal screen holes 105 do not change when the roller 101 rotates.

[0033] In the above or some embodiments, the longitudinal screen holes 105 on the same roller 101 can be located on the same straight line or on different straight lines. When they are not on the same straight line, a third screen disk is also included. The diameter of the third screen disk is smaller than that of the second screen disk 104. The outer edge of the array formed by the second screen disk 104 on one roller 101 corresponds to the outer edge of the third screen disk at the adjacent roller 101, forming the edge of the longitudinal screen hole 105, thus constituting a structure in which the longitudinal screen holes 105 on the same roller 101 are located on different straight lines. In practice, due to the influence of machine layout and installation, the material vibration screening may have different distributions or stacking states in different areas. Controlling the position of the longitudinal screen holes can adjust the distribution of different longitudinal screen holes in different areas according to the screening situation, thereby obtaining a better screening effect.

[0034] To facilitate the movement of the roller 101, the screen can adjust the orientation of the cigarettes. The size of the screen teeth at each screen can be selected. The length between the screen teeth at the first screen 103 is approximately the length of two standard cigarettes. The length between the screen teeth at the second screen 104 is the length of one standard cigarette. The length of the screen teeth at the third screen is the diameter of one thin cigarette (4mm), and the length between the screen teeth is half the length of a thin cigarette.

[0035] A purification screen for waste cigarette processing includes a roller screen 100 and a linear screen 200 located below the roller screen. The linear screen 200 includes a screen plate 202 located in a screen box 201. The screen plate 202 has a plate-like structure. The screen mesh includes a plurality of arrayed comb teeth 203. One end of each comb tooth 203 is connected to the screen plate 202, and the other end of each comb tooth 203 is raised and faces the material flow direction. The size between each comb tooth 203 is smaller than the diameter of the cigarette. The lower edge of the raised end of each comb tooth 203 forms a gap with the screen plate 202 that is smaller than the diameter of the cigarette, forming a structure in which waste materials such as paper scraps, tobacco shreds, and broken cigarette mouthpieces all leak to the lower layer.

[0036] The sieve plate 202 transforms the planar holes into three-dimensional sieve holes through the comb-like structure 203, that is, transforming two-dimensional into three-dimensional. The raised end of the comb 203 is about 3mm higher than the sieve surface. As the waste cigarettes flow uphill along the sieve surface, foreign objects smaller than the waste cigarettes enter the sieve holes. The original vibration force of the vibrating linear sieve 200 causes the comb 203 that makes up the sieve holes to vibrate. When the comb vibrates, it can achieve vibration and bounce on the contacting cigarettes, so that the material cannot stick to or adhere to the sieve plate 202, thus obtaining a looser material. At this time, the fine material has a more spacious leakage gap. Not only is the screening efficiency high, but the vibration of the comb 203 can also achieve a certain degree of self-cleaning by linearly vibrating and hitting the adhered fragments. Compared with traditional static sieve holes, it is not easy to clog the holes.

[0037] In the above or some embodiments, the comb teeth 203 are formed by multiple comb tooth 203 units, each comb tooth 203 unit is composed of multiple adjacent comb teeth 203 arranged together, and there is a gap formed by the screen plate 202 between each comb tooth 203 unit. Each comb tooth 203 unit has a corresponding screen hole below it. In the above or some embodiments, the screen hole distribution is 4mm x 40mm as one long screen hole. According to the natural frequency of the stainless steel plate and the natural frequency of the linear vibrating screen, the width of the spacer plate between the longitudinally arranged screen holes is 3mm x 40mm as one row, and the distance between one row and another row is about 5mm.

[0038] In the above or some embodiments, the linear screen 200 is a multi-layer linear screen 200. Adjacent screen boxes 201 are connected by ">" shaped elastic vibration supports 204. The elastic vibration support 204 includes an upper elastic joint 205, a lower elastic joint 206, and a middle elastic joint 207. The upper and lower elastic structures are connected to the corresponding screen boxes 201, and the middle elastic structure is connected to the frame 300 located between the upper and lower screen boxes 201. Each elastic joint consists of a square space made of metal and a square rotating shaft. The rotating shaft and the square space form a right-angle space, which is filled with a cylindrical rubber body. The above structure is the same as that of a general elastic support. In this solution, the main structure of the elastic support is ">", with elastic joints formed at its upper, middle, and lower ends. The two ends of the main structure are connected to the upper and lower corresponding screen boxes 201, and the middle position is connected to the frame 300.

[0039] In the above or some embodiments, the system also includes a column 306 fixedly connected to the longitudinal beam 304. The middle part of the column 306 is fixedly connected to the frame 300 through a connecting arm. The system also includes a crossbeam 307 located between the columns 306. A vibration motor is provided at the lower column 306. The vibration motor is used to drive the linear screen 200.

[0040] The roller screen used in this invention overcomes the problem of uniform screen hole orientation in traditional roller screens by employing a method of alternating longitudinal and transverse screen holes. This significantly improves screening efficiency, and the screening size of the longitudinal and transverse screen holes remains unchanged during roller movement. Furthermore, the size of the longitudinal and transverse screen holes can be effectively and conveniently controlled by adjusting the screen plate gap and screen plate diameter, adapting to variations in cigarette thickness and length. Even bent cigarettes in the waste can still be screened through the screen holes. The lower linear screen, with its comb-shaped teeth, transforms planar holes into three-dimensional screen holes, allowing waste cigarettes to pass through smoothly as they flow uphill on the screen surface. When foreign objects smaller than waste cigarettes enter the screen holes, the material cannot adhere to the screen plate due to the breakage and upward tilt of one end of the screen hole partition. The original vibration force of the linear screen causes the comb teeth that make up the screen holes to break the material and resonate with the screen plate, resulting in high screening efficiency, self-cleaning, and no clogging. On the other hand, the elastic vibration support is ">" shaped, with the upper and lower elastic structures connected to the corresponding screen boxes, and the middle elastic structure connected to the frame located between the upper and lower screen boxes. This forms a structure where only one screen box needs to be driven to vibrate, which can drive the other screen box through the elastic vibration support, avoiding the structure of traditional elastic vibration support that requires two vibration sources for driving.

Claims

1. A roller screen, comprising a screen frame (102) for mounting rollers (101), and further comprising a power source and transmission mechanism for driving the rotation of each roller (101), wherein each roller (101) is arranged in an array to mount a plurality of disc-shaped screen discs, characterized in that, The screen includes a first screen (103) with a larger diameter and a second screen (104) with a smaller diameter than the first screen (103). The first screen (103) extends beyond the second screen (104) and is close to the outer periphery of the adjacent roller (101) or the adjacent roller (101) to install components. Multiple arrays of second screens (104) are arranged between each first screen (103). Between adjacent first screens (103) on the same shaft (101) and between the outer edge of the second screen (104) and the outer edge of the second screen (104) on the adjacent roller (101), longitudinal screen holes (105) are formed in the same direction as the axial direction of the roller (101). Transverse screen holes (106) matching the diameter of strip-shaped materials are formed between adjacent screens on the same roller (101). The dimensions of the transverse screen holes (106) and the longitudinal screen holes (105) do not change when the roller (101) rotates.

2. The roller screen according to claim 1, characterized in that, The longitudinal sieve holes (105) on the same roller shaft (101) are located on the same straight line or on different straight lines.

3. The roller screen according to claim 2, characterized in that, It also includes a third screen plate, the diameter of which is smaller than that of the second screen plate (104). The outer edge of the array formed by the second screen plate (104) on a shaft (101) corresponds to the outer edge of the third screen plate at the adjacent roller shaft (101), forming the edge of the longitudinal screen hole (105), thus constituting a structure in which the longitudinal screen holes (105) on the same roller shaft (101) are located on different straight lines.

4. A purification screen for waste cigarettes before treatment, comprising a roller screen as described in any one of claims 1-3, wherein a linear screen (200) is further provided below the roller screen, and the linear screen (200) comprises a screen plate (202) located within a screen box (201), characterized in that, The sieve plate (202) is a plate-shaped structure. The sieve plate (202) includes a plurality of comb teeth (203) arranged in an array and easily driven to vibrate by a vibration source. One end of the comb teeth (203) is connected to the sieve plate (202), and the other end of the comb teeth (203) is raised and faces the material flow direction. The gap between each comb tooth (203) is smaller than the diameter of the cigarette. The lower edge of the raised end of each comb tooth (203) forms a gap with the sieve plate (202) that is smaller than the diameter of the cigarette.

5. The purification screen for waste cigarette treatment according to claim 4, characterized in that, The comb teeth (203) are formed by multiple comb tooth (203) units, each comb tooth (203) unit is composed of multiple adjacent comb teeth (203) arranged together, and there is a gap formed by a sieve plate (202) between each comb tooth (203) unit.

6. The purification sieve for treating waste cigarettes according to claim 4 or 5, characterized in that, The linear screen (200) is a multi-layer linear screen (200). The adjacent screen boxes (201) are connected by an elastic vibration support (204) in the shape of a "">". The elastic vibration support (204) includes an upper elastic joint (205), a lower elastic joint (206), and an intermediate elastic joint (207). The upper and lower elastic structures are connected to the corresponding screen boxes (201), and the intermediate elastic structure is connected to the frame (300) located between the upper and lower screen boxes (201).

7. The purification screen for waste cigarette treatment according to claim 6, characterized in that, The screen frame (102) includes side plates (301) located at both ends of the roller shaft (101) and an end panel (302) located at the feed position of the roller screen. The end panel (302) and the side plates (301) form the mounting structure of the roller shaft (101). The other end of the screen frame (102) is provided with a discharge plate (303) that is inclined below the roller shaft (101).

8. The purification screen for waste cigarette treatment according to claim 6, characterized in that, A longitudinal beam (304) is fixedly connected to the outer periphery of the screen frame (102). The upper end face of the longitudinal beam (304) is mounted on a bearing seat (305) that rotates with each roller shaft (101). The roller shaft (101) and the chain drive mechanism form a transmission in the same direction. The screen frame (102) also includes a column (306) fixedly connected to the longitudinal beam (304). The middle part of the column (306) is fixedly connected to the frame (300) through a connecting arm. The screen frame (102) also includes a crossbeam (307) located between the columns (306).

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