Threshing line with pre-threshing tobacco crushing pipeline and tobacco crushing process

Abstract

The present application belongs to the tobacco industry in the threshing and redrying technical field, and particularly relates to a threshing line provided with a tobacco shred processing flow line before threshing and a tobacco shred processing technology. The threshing line provided with the tobacco shred processing flow line before threshing comprises a tobacco laying and arranging device, a first moistening device, eight parallel air separation and impurity removing devices, a second moistening device and a threshing air separation device connected in sequence through a conveying belt. The threshing air separation device comprises a first threshing device, a second threshing device, a third threshing device and a fourth threshing device. A tobacco shred collecting device is arranged at the sieve net outlet of the conveying belt between the tobacco laying and arranging device and the first moistening device and at the impurity outlet of the air separation and impurity removing device. A tobacco shred adding device is arranged between the first threshing device and the second threshing device. Advantageous effects: compared with the prior art, the threshing line provided with the tobacco shred processing flow line before threshing can realize the centralized and all-around precise impurity removal of tobacco shreds on line, reduces the manual labor amount, improves the work efficiency and product quality, and meets the needs of modern production.

Description

Technical Field

[0001] This invention belongs to the field of tobacco leaf threshing and re-drying technology in the tobacco industry, specifically relating to a threshing line equipped with a pre-threshing tobacco shredding processing line and its tobacco shredding processing technology. Background Technology

[0002] Currently, the tobacco leaf threshing and re-drying process is conducted on a continuous production line. During the transfer of tobacco leaves, a significant amount of broken tobacco is generated, and this is even more pronounced during the leaf laying and bundling stage. This broken tobacco easily clogs the equipment when it enters the primary rinsing process, affecting its operation. Furthermore, the air separation and impurity removal equipment, used to remove light impurities, also produces broken tobacco along with it. This broken tobacco, after manual removal, re-enters the secondary rinsing unit, which is prone to clogging. Moreover, the manual removal method is no longer suitable for the continuous production line operation. To ensure stable equipment operation and enable the continuous production line to accurately classify and thoroughly purify broken tobacco before it re-enters the threshing and re-drying process, a pre-threshing broken tobacco treatment process needs to be implemented in the threshing and re-drying production line to further improve the utilization value of the tobacco raw materials. Summary of the Invention

[0003] The technical problem to be solved by this invention is: how to design a tobacco shredding line and its tobacco shredding process for a pre-shredding tobacco processing line, which is adapted to the operation mode of a production line.

[0004] The specific plan is as follows:

[0005] A leaf-threshing line equipped with a pre-threshing tobacco shredding centralized processing line includes a leaf-laying and stacking device, a primary moistening device, eight parallel air-separating and impurity-removing devices, a secondary moistening device, and a leaf-threshing air-separating device connected in series via a conveyor belt. The leaf-threshing air-separating device includes a first-threshing device, a second-threshing device, a third-threshing device, and a fourth-threshing device. Shredded tobacco collection devices are installed at the screen outlet on the conveyor belt between the leaf-laying and stacking device and the primary moistening device, and at the impurity outlet of the air-separating and impurity-removing device. A shredded tobacco inlet device is located between the first-threshing device and the second-threshing device. Pre-threshing tobacco shredding is located between the shredded tobacco collection device and the shredded tobacco inlet device. The centralized processing line for shredded tobacco includes a quantitative feeding device, a drum drying device, a vibrating screen, a three-dimensional rotary vibrating screen, a metal removal device, and an intelligent removal device, all connected in series via conveyor belts. Specifically: the feeding device is connected to the upstream shredded tobacco collection device; the intelligent removal device is connected to the downstream secondary shredding equipment; the upper outlet of the vibrating screen is connected to the metal removal device, and its lower outlet is connected to the three-dimensional rotary vibrating screen; the upper outlet of the three-dimensional rotary vibrating screen is connected to the debris collection device, its middle outlet is connected to the metal removal device, and its lower outlet is connected to the dust collection device.

[0006] At least three ternary rotary vibrating screens are provided, connected in parallel between the vibrating screening device and the metal removal device.

[0007] Eight air separation and impurity removal devices are connected in parallel between the primary and secondary humidification units.

[0008] The intelligent rejection device includes:

[0009] Bottom belt conveyor, used for conveying tobacco leaf materials;

[0010] A photographic recognition device is used to photograph tobacco leaf materials in order to identify impurities in the tobacco leaf materials;

[0011] A debris removal device, used to remove debris from tobacco leaf materials;

[0012] The control device, the bottom belt conveyor, the photo recognition device, and the debris removal device are all connected to the control device. The photo recognition device and the debris removal device are arranged sequentially above the bottom belt conveyor.

[0013] The photo recognition device includes a first mounting bracket, a camera, and a light source. The camera and the light source are both mounted on the first mounting bracket and are both connected to a control device.

[0014] The first mounting bracket is made of aluminum profiles;

[0015] The light source consists of multiple LED beads arranged in a matrix;

[0016] The camera is mounted on top of the first mounting bracket and takes pictures from top to bottom;

[0017] The debris removal device includes a second mounting bracket, a debris collection box located at the lower part of the second mounting bracket, a linear manipulator that moves spatially along the second mounting bracket, and a debris suction port located at the bottom of the linear manipulator. The debris suction port and the debris collection box are connected by a hose, and the linear manipulator is connected to a control device.

[0018] The second mounting bracket is made of multiple rectangular tubes welded together, and several horizontal and diagonal braces are welded onto the second mounting bracket.

[0019] The debris suction port is a vacuum generator;

[0020] The bottom belt conveyor includes a conveyor belt, a drive mechanism for driving the conveyor belt to transmit data, and a frame. The conveyor belt and the drive mechanism are both mounted on the frame. The drive mechanism is connected to the conveyor belt, and the drive device is connected to the control device.

[0021] The bottom belt conveyor also includes an encoder assembly, which includes a synchronous pulley, an encoder connected to the synchronous pulley, and a mounting bracket for mounting the encoder. The synchronous pulley is in direct contact with the conveyor belt, and the mounting bracket is mounted on the frame. The encoder is connected to a control device to transmit the number of rotations of the synchronous pulley to the control device.

[0022] A tobacco shredding process, using the aforementioned tobacco shredding line equipped with a pre-shredding centralized processing line, includes the following steps:

[0023] S1. The mixture of broken smoke and impurities separated from the screen outlet on the conveyor belt between the leaf-spreading device and the first-lubrication device, and the light impurity outlet of the air separation and impurity removal device is collected and then enters the quantitative feeding device.

[0024] S2. The mixture of broken smoke and impurities is dried by a drum dryer after being fed evenly and intermittently by a quantitative feeding device.

[0025] S3. The mixture of dried tobacco fragments and impurities enters the vibrating screen. The screen holes of the vibrating screen are large enough. Large fragments, tobacco leaves with stems, and impurities that are too large to pass through the screen enter the metal removal device. Small fragments, dust, and impurities that are too small to pass through the screen enter the three-dimensional vibrating screen.

[0026] Among them: large fragments are leaf fragments >12.7mm×12.7mm;

[0027] Small fragments are leaf fragments ranging from 2.36mm × 2.36mm to 12.7mm × 12.7mm;

[0028] The fragments are leaf fragments <2.36mm × 2.36mm;

[0029] S4. Small fragments, dust, and other small debris that can pass through the screen enter the three-element vibrating screen. Hemp fibers and hemp clumps are clumped together by the vibrating screen and then screened out in the upper layer, entering the debris collection device. Small fragments and other small debris enter the metal removal device, while dust and dirt enter the dust collection device.

[0030] Among them, small debris that can pass through the sieve includes hemp fibers, hemp clumps, and dust;

[0031] S5. Large fragments, small fragments, and debris such as sesame shreds, dust, etc. pass through the metal removal device, where the metal debris is removed by magnetic attraction. Then, the large fragments, small fragments, and remaining debris enter the intelligent removal device.

[0032] S6. Large fragments, small fragments, and remaining debris pass through an intelligent debris removal device. Relying on machine vision technology, the remaining debris is removed from the tobacco material based on color and shape. The removed large and small fragments then re-enter the second-stage processing equipment via a broken tobacco addition device.

[0033] Beneficial effects: Compared with the prior art, the present invention has a tobacco shredding line with a pre-shredding tobacco shredding processing line, which can realize centralized, all-round and precise impurity removal of shredded tobacco online, reduce manual labor, improve efficiency and product quality, and meet the needs of modern production. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the present invention.

[0035] Figure 2 This is a schematic diagram of the intelligent impurity removal and sorting machine provided by the present invention.

[0036] Figure 3 for Figure 2 Top view.

[0037] Figure 4 for Figure 2 The main view.

[0038] Figure 5 This is a schematic diagram of the debris removal device.

[0039] Figure 6 for Figure 5 The main view.

[0040] Figure 7 This is a schematic diagram of the photo recognition device.

[0041] Figure 8 for Figure 7 The main view.

[0042] Figure 9 This is a schematic diagram of the bottom belt conveyor device.

[0043] Figure 10 for Figure 9 The main view. Detailed Implementation

[0044] The technical solutions in the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings.

[0045] like Figure 1 A leaf-beating line equipped with a pre-shredded tobacco centralized processing line includes a leaf-laying and swaying device, a first-level moistening device, an air-separating and impurity-removing device, a second-level moistening device, and a leaf-beating air-separating device connected in series by a conveyor belt, wherein the leaf-beating air-separating device includes a first-beating device, a second-beating device, a third-beating device, and a fourth-beating device.

[0046] Broken tobacco collection devices are installed at the screen outlet of the conveyor belt between the leaf-laying device and the first-stage moistening device, and at the debris outlet of the air separation and impurity removal device. Broken tobacco inlet device is installed between the second-stage and third-stage beating devices. A centralized processing line for broken tobacco before leaf beating is installed between the broken tobacco collection device and the broken tobacco inlet device.

[0047] The pre-threshing tobacco centralized processing line includes a quantitative feeding device, a drum dryer, a vibrating screen, a three-dimensional rotary vibrating screen, a metal removal device, and an intelligent removal device, all connected in series via conveyor belts.

[0048] The feeding device is connected to the upstream flue gas collection device, and the intelligent waste removal device is connected to the downstream secondary processing equipment.

[0049] The upper outlet of the vibrating screening device is connected to a metal removal device and an intelligent removal device, while its lower outlet is connected to a three-dimensional rotary vibrating screen in parallel.

[0050] The upper outlet of the three-dimensional vibrating screen is connected to a debris collection device, the middle outlet is connected to a metal removal device, and the lower outlet is connected to a dust collection device.

[0051] To avoid the three-dimensional rotary vibrating screen becoming a bottleneck, at least three three-dimensional rotary vibrating screens are installed, connected in parallel between the vibrating screening device and the metal removal device.

[0052] To ensure thorough impurity removal in the initial stages, eight air-based impurity removal devices are connected in parallel between the primary and secondary humidification units. This does not affect processing efficiency.

[0053] The intelligent rejection device includes:

[0054] Bottom belt conveyor 1, which is used to convey tobacco leaf materials;

[0055] The photo recognition device 2 is used to take pictures of tobacco leaf materials to identify impurities in the tobacco leaf materials;

[0056] The impurity removal device 3 is used to remove impurities from tobacco leaf materials;

[0057] The control device, the bottom belt conveyor 1, the photo recognition device 2 and the debris removal device 3 are all connected to the control device. The photo recognition device 2 and the debris removal device 3 are arranged sequentially above the bottom belt conveyor 1.

[0058] It should be noted that all the impurity sorting processes of tobacco leaf materials are completed on the bottom belt conveyor 1. The photo recognition device 2 is used to detect impurities on the bottom belt conveyor 1, and the impurity removal device 3 is used to remove the detected impurities. The photo recognition device 2 and the impurity removal device 3 are two independent devices. These two devices work together to complete the impurity removal operation, thereby realizing automated and intelligent impurity removal and sorting, improving the efficiency of impurity removal operations, and reducing labor costs and labor intensity.

[0059] In practical applications, the shape, structure, size, material, and position of the bottom belt conveyor 1, the photo recognition device 2, and the debris removal device 3 can be determined according to the actual situation and needs.

[0060] When using the intelligent impurity removal device provided by this invention, tobacco leaf material can be conveyed through the bottom conveyor 1. During the conveying process, when the tobacco leaf material passes under the photo recognition device 2, it can be photographed and recorded by the photo recognition device 2 to identify whether the tobacco leaf material contains impurities, and a signal is transmitted to the control device. When the control device receives the signal that there are impurities, it can drive the impurity removal device 3 to operate, so as to remove the impurities from the tobacco leaf material, thereby completing the entire impurity removal process. That is, this device can automatically remove impurities from tobacco leaf material, thereby effectively improving the impurity removal efficiency of tobacco material. Furthermore, this device has a simple structure, is easy to use, and is convenient for widespread application.

[0061] Intelligent impurity removal devices can automatically remove impurities from tobacco materials, effectively improving the efficiency of impurity removal from tobacco materials.

[0062] The photo recognition device 2 includes a first mounting bracket 21, a camera 22, and a light source 23. Both the camera 22 and the light source 23 are mounted on the first mounting bracket 21, and both are connected to a control device. By controlling the operation of the light source 23, light can be shone onto the tobacco material, providing a brighter environment for the camera 22 to capture images clearly, thus facilitating the detection of impurities mixed in with the tobacco material.

[0063] The first mounting bracket 21 is spliced ​​from aluminum profiles to improve the structural stability of the first mounting bracket 21 and ensure that the first mounting bracket 21 can be processed and manufactured into various required shapes.

[0064] The light source 23 includes multiple LED beads arranged in a matrix.

[0065] It should be noted that the camera 22 can be mounted on top of the first mounting bracket 21 for top-down imaging. The light source 23 is mounted on a crossbeam of the first mounting bracket 21. The light source 23 is an LED bead combination with high luminous efficiency and constant color temperature. For example, a linear LED ultra-high brightness light source 23 (bead) module can be used, with three beads arranged in a staggered pattern. This arrangement of the light source 23 provides better luminous uniformity and linearity, ensuring consistent color temperature and light intensity after screening. The light source 23 directly illuminates the bottom conveyor belt 1 to allow the camera 22 to clearly capture the tobacco material.

[0066] In one embodiment, the debris removal device 3 includes a second mounting bracket 31, a debris collection box 32 located at the lower part of the second mounting bracket 31, a linear manipulator 33 that moves spatially along the second mounting bracket 31, and a debris suction port 34 located at the bottom of the linear manipulator 33. The debris suction port 34 and the debris collection box 32 are connected by a hose 35, and the linear manipulator 33 is connected to a control device.

[0067] It should be noted that tobacco material with impurities can enter this equipment from the front section. The tobacco material with impurities is photographed and identified at the front section of the bottom belt conveyor, and the impurities are sucked out through the impurity suction port 34 at the rear section of the bottom belt conveyor, thus completing the entire operation.

[0068] The second mounting bracket 31 is welded from multiple rectangular tubes, and several horizontal and diagonal braces are welded onto the second mounting bracket 31. For example, the main body of the second mounting bracket 31 can be welded from eight rectangular tubes, and several horizontal and diagonal braces can be welded onto the main body to reinforce the entire second mounting bracket 31.

[0069] It should also be noted that the second mounting bracket 31 can extend beyond the side plate of the bottom belt conveyor. The linear manipulator 33 can be mounted on one of the cross braces of the second mounting bracket 31. This linear manipulator 33 can perform Y-axis and Z-axis movements. The main structural components of the linear manipulator 33 include linear guides, ball screws, aluminum alloy profiles, ball screw support seats, diaphragm couplings, photoelectric switches, and servo motors. The linear guide, also known as a slide rail, linear guide, or linear slide rail, is used in linear reciprocating motion applications. It has a higher rated load than linear bearings and can withstand a certain amount of torque, enabling high-precision linear motion under high load conditions.

[0070] Ball screws convert rotary motion into linear motion. Composed of a screw, nut, and balls, they achieve high-precision linear motion under high loads. Aluminum alloy profile slides are aesthetically pleasing, rationally designed, rigid, and reliable, making them ideal foundational power components for combination machine tools and automated lines, exhibiting excellent dynamic performance. The ball screw support features high-rigidity, high-precision, ultra-miniature angular contact ball bearings, ensuring stable rotary performance. Diaphragm couplings effectively transmit force between the motor and the screw during high-speed operation, while compensating for radial, angular, and axial misalignments.

[0071] The Y-axis and Z-axis movements of the linear robot 33 are typically achieved by controlling the servo controllers (i.e., servo modules 36) of the two axes. Based on process requirements, the system sends commands to the servo controllers of the Y-axis and Z-axis via a control device to control the rotation of the motors. The encoders provide feedback on the actual position and speed of the motors, thus enabling the linkage between the two axes. This linkage is achieved through closed-loop control of the servo controllers, allowing precise control of the movement speed and position of the two axes, thereby achieving precise control of the spatial movement of the linear robot 33.

[0072] The debris suction port 34 is a vacuum generator.

[0073] It should be noted that the debris suction port 34 can be installed on the servo module 36. The debris suction port 34 is a vacuum generator, which is driven only by compressed air. It is safe to use, has no fire hazard, and is powered by compressed air, requiring no electricity. The working principle of the vacuum generator is as follows: after the compressed air flows into the annular high-pressure chamber through the air inlet, it flows through the nozzle at high speed. This high-speed airflow creates a low-pressure zone at the inlet, causing the material at the inlet to be sucked in by the high-pressure airflow. The outlet is connected to the flexible connector. Debris enters from the inlet of the debris suction port 34, passes through the hose 35, and enters the debris collection box 32.

[0074] The bottom belt conveyor 1 includes a conveyor belt 11, a drive mechanism 12 for driving the conveyor belt 11, and a frame 13. Both the conveyor belt 11 and the drive mechanism 12 are mounted on the frame 13. The drive mechanism 12 is connected to the conveyor belt 11, and the drive mechanism is connected to a control device. The frame 13 supports the conveyor belt 11, and the drive mechanism 12 provides power to the conveyor belt 11. For example, the drive mechanism 12 can be configured similarly to a synchronous belt drive to tighten the conveyor belt 11 and cause it to reciprocate in a circumferential rotation, thereby continuously conveying tobacco material using the conveyor belt 11.

[0075] The bottom belt conveyor 1 also includes an encoder assembly 14, which includes a synchronous pulley, an encoder connected to the synchronous pulley, and a mounting bracket for mounting the encoder. The synchronous pulley is in direct contact with the conveyor belt 11 and is mounted on the frame 13. The encoder is connected to a control device to transmit the number of rotations of the synchronous pulley to the control device.

[0076] It should be noted that the synchronous pulley is in direct contact with the conveyor belt 11, and rotates along with the conveyor belt 11. An encoder is connected to the synchronous pulley; as the pulley rotates, the encoder receives infrared light or laser light reflected back from the pulley, thus recording the number of rotations. Furthermore, because the synchronous pulley is in direct contact with the conveyor belt 11, its rotational speed is the same as that of the conveyor belt 11. By measuring the number of rotations of the synchronous pulley, the conveying speed of the conveyor belt 11 can be obtained. The encoder is connected to a control device to transmit the measured conveyor belt 11 speed data to the control device for processing and display.

[0077] It should be noted that the first mounting bracket 21 and the second mounting bracket 31 mentioned in this invention are only distinguished by their different positions and do not have any order of precedence.

[0078] Its working principle is as follows:

[0079] Its shredded smoke processing technology includes the following steps:

[0080] S1. The mixture of broken smoke and impurities separated from the screen outlet on the conveyor belt between the leaf-spreading device and the first-lubrication device, and the light impurity outlet of the air separation and impurity removal device is collected and then enters the quantitative feeding device.

[0081] S2. After being fed evenly and intermittently by a quantitative feeding device, the mixture of shredded tobacco and impurities is dried by a drum drying device. In this step, the shredded tobacco containing moisture after passing through the leaf spreading device and the first moistening device is made sticky, which is not conducive to subsequent impurity removal, so drying is required.

[0082] S3. The dried tobacco fragments and impurities mixture enters the vibrating screen. The screen openings of the vibrating screen are large enough. Large fragments (>12.7mm×12.7mm), tobacco leaves with stems, and impurities that are too large to pass through the screen enter the metal removal device. Small fragments (2.36mm×2.36mm -12.7mm×12.7mm), dust (<2.36mm×2.36mm, where the size of the dust can be adjusted according to the needs of cigarette industry customers, the most common being 2.36mm×2.36mm and 1mm×1mm) and impurities that are small enough to pass through the screen enter the three-dimensional vibrating screen. The vibrating screen is a screening device on the production line. Although it is relatively convenient to set up, larger tobacco fragments are also prone to being mixed with smaller tobacco fragments, causing screening failure. On the other hand, hemp fibers and clumps are not easy to screen out. Therefore, the screen openings of this vibrating screen device need to be large enough to allow smaller pieces of smoke and hemp fibers to come out of the fine material outlet of the vibrating screen device. However, there is also a drawback: small fragments also come out of the fine material outlet. Since these small fragments can also be recycled, this solution is to configure a three-dimensional rotary vibrating screen device downstream of the vibrating screen device to continue screening and recycle the small fragments.

[0083] S4. Small fragments, dust, and other small debris that can pass through the screen enter the three-element vibrating screen. Hemp fibers and hemp clumps are vibrated and then screened out on the upper layer and enter the debris collection device. Small fragments and other small debris enter the metal removal device. Dust and dirt enter the dust collection device and are subsequently scrapped or processed and utilized by tobacco sheet enterprises.

[0084] Smaller debris that can pass through the sieve includes hemp fibers, hemp clumps, and dust;

[0085] S5. Large fragments, small fragments, and debris such as sesame shreds, dust, etc. pass through the metal removal device, where the metal debris is removed by magnetic attraction. Then, the large fragments, small fragments, and remaining debris enter the intelligent removal device.

[0086] S6. Large fragments, small fragments, and remaining debris pass through an intelligent debris removal device. Relying on machine vision technology, the device removes the remaining debris from the tobacco material based on color and shape using an intelligent robotic arm. The removed large and small fragments then re-enter the second-stage processing equipment via a broken tobacco addition device.

[0087] In this way, the usable tobacco fragments can be returned to the mainstream of tobacco re-drying.

[0088] Features of this application:

[0089] S1. In order to improve screening efficiency and effect and prevent uneven feeding at the input port, this application is equipped with a quantitative feeding device to provide uniform intermittent supply.

[0090] S2. Stubble and light debris can easily clog equipment. This process can separate and centrally process the stubble generated in each stage before leaf threshing, which helps to improve the operating status of the equipment and ensure production stability.

[0091] S3. By removing large and medium-sized broken tobacco leaves, they directly enter the second beating process of the leaf beating line, avoiding the high-intensity beating of the first beating, which can reduce breakage and improve the economic efficiency of enterprises.

[0092] S4. The three-dimensional vibrating screen has at least three components to distribute the flow rate and improve the screening effect.

[0093] S5. Equipped with a drum dryer, the moisture content of the broken smoke is controlled within a certain range, which is beneficial for separating lightweight impurities such as hemp fibers, hemp clumps, and feathers from the fragments.

[0094] S6 integrates multiple impurity removal processes to achieve all-round impurity removal and ensure product quality.

[0095] S7. The system enables precise classification of cigarette waste, allowing usable fragments to be reintroduced into the production line as needed, thereby improving the company's economic efficiency.

[0096] Other details are available in existing technologies and will not be elaborated further.

[0097] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A leaf-beating line equipped with a centralized processing line for pre-beating tobacco, comprising a leaf-laying and stacking device, a primary moistening device, eight parallel air-dividing and impurity-removing devices, a secondary moistening device, and a leaf-beating air-dividing device connected in series via a conveyor belt, wherein the leaf-beating air-dividing device includes a first-beating device, a second-beating device, a third-beating device, and a fourth-beating device, characterized in that: A shredded tobacco collection device is installed at the screen outlet on the conveyor belt between the leaf-laying device and the first-running device, and at the debris outlet of the air separation and impurity removal device. A shredded tobacco inlet device is installed between the first-running device and the second-running device. A shredded tobacco centralized processing line is installed between the shredded tobacco collection device and the shredded tobacco inlet device. The pre-threshing tobacco centralized processing line includes a quantitative feeding device, a drum dryer, a vibrating screen, a three-dimensional rotary vibrating screen, a metal removal device, and an intelligent removal device, all connected in series via conveyor belts. The feeding device is connected to the upstream flue gas collection device, and the intelligent impurity removal device is connected to the downstream secondary processing equipment; The upper outlet of the vibrating screen is connected to a metal removal device, and its lower outlet is connected to a three-dimensional rotary vibrating screen. The upper outlet of the three-dimensional vibrating screen device is connected to a debris collection device, the middle outlet is connected to a metal removal device, and the lower outlet is connected to a dust collection device.

2. The tobacco threshing line as described in claim 1, characterized in that: The three-element rotary vibrating screen device is provided with at least three units, which are connected in parallel between the vibrating screening device and the metal removal device.

3. The tobacco threshing line as described in claim 2, characterized in that: The intelligent rejection device includes: Bottom belt conveyor (1), which is used to convey tobacco leaf materials; Photo recognition device (2), which is used to take pictures of tobacco materials to identify impurities in the tobacco materials; The impurity removal device (3) is used to remove impurities from tobacco leaf materials; The control device, the bottom belt conveyor (1), the photo recognition device (2) and the debris removal device (3) are all connected to the control device. The photo recognition device (2) and the debris removal device (3) are arranged above the bottom belt conveyor (1) in sequence. The photo recognition device (2) includes a first mounting bracket (21), a camera (22) and a light source (23). The camera (22) and the light source (23) are both mounted on the first mounting bracket (21), and the camera (22) and the light source (23) are both connected to the control device. The first mounting bracket (21) is made of aluminum profile splicing; The light source (23) includes multiple LED beads arranged in a matrix; The camera (22) is mounted on top of the first mounting bracket (21) and takes pictures from top to bottom; The debris removal device (3) includes a second mounting bracket (31), a debris collection box (32) located at the lower part of the second mounting bracket (31), a linear manipulator (33) that moves along the second mounting bracket (31) in space, and a debris suction port (34) located at the bottom of the linear manipulator (33). The debris suction port (34) and the debris collection box (32) are connected by a hose (35), and the linear manipulator (33) is connected to a control device. The second mounting bracket (31) is welded from multiple rectangular tubes, and several horizontal and diagonal braces are welded on the second mounting bracket (31); The debris suction port (34) is a vacuum generator; The bottom belt conveyor (1) includes a conveyor belt (11), a drive mechanism (12) for driving the conveyor belt (11) to transmit, and a frame (13). The conveyor belt (11) and the drive mechanism (12) are both mounted on the frame (13). The drive mechanism (12) is connected to the conveyor belt (11), and the drive device is connected to the control device. The bottom belt conveyor (1) also includes an encoder assembly (14), which includes a synchronous pulley, an encoder connected to the synchronous pulley, and a mounting bracket for mounting the encoder. The synchronous pulley is in direct contact with the conveyor belt (11) and is mounted on the frame (13). The encoder is connected to the control device to transmit the number of rotations of the synchronous pulley to the control device.

4. A process for processing shredded tobacco, characterized in that: Using the tobacco threshing line as described in claim 3, which includes a pre-threshing tobacco shredding centralized processing line, the following steps are included: S1. The mixture of broken smoke and impurities separated from the screen outlet on the conveyor belt between the leaf-spreading device and the first-lubrication device, and the light impurity outlet of the air separation and impurity removal device is collected and then enters the quantitative feeding device. S2. The mixture of broken smoke and impurities is dried by a drum dryer after being fed evenly and intermittently by a quantitative feeding device. S3. The dried tobacco and debris mixture enters the vibrating screen device. The screen holes of the vibrating screen device are large enough. Large fragments, tobacco leaves with stems, and debris that cannot pass through the screen enter the metal removal device. Small fragments, dust, and debris that can pass through the screen enter the three-dimensional rotary vibrating screen device. Among them: large fragments are leaf fragments >12.7mm×12.7mm; Small fragments are leaf fragments ranging from 2.36mm × 2.36mm to 12.7mm × 12.7mm; The fragments are leaf fragments <2.36mm × 2.36mm; S4. Small fragments, dust, and other small debris that can pass through the screen enter the three-element vibrating screen device. Hemp fibers and hemp clumps are vibrated into clumps and then screened out in the upper layer and enter the debris collection device. Dust and dust enter the dust collection device. Small fragments and other small debris enter the metal removal device. Among them, small debris that can pass through the sieve includes hemp fibers, hemp clumps, and dust; S5. Large fragments, small fragments, and debris such as sesame shreds, dust, etc. pass through the metal removal device, where the metal debris is removed by magnetic attraction. Then, the large fragments, small fragments, and remaining debris enter the intelligent removal device. S6. Large fragments, small fragments, and remaining debris pass through an intelligent debris removal device. Relying on machine vision technology, the remaining debris is removed from the tobacco material based on color and shape. The removed large and small fragments then re-enter the second-stage processing equipment via a broken tobacco addition device.

Images