Tobacco leaf impurity removing and winnowing device

Abstract

The invention relates to the field of tobacco processing equipment.The tobacco leaf impurity removing and winnowing device comprises a winnowing box body, a monitoring mechanism and a winnowing mechanism, a feeding mechanism is installed on the winnowing box body, the monitoring mechanism is installed on the feeding mechanism and used for monitoring impurities in tobacco leaves, the winnowing mechanism is installed in the box body, and the winnowing mechanism is installed on the box body. A material receiving mechanism is installed in the winnowing box body, the winnowing mechanism comprises a draught fan and a plurality of spray heads, the draught fan is installed between the discharging end of the feeding mechanism and the material receiving mechanism, the spray heads are installed at an air outlet of the draught fan, a central control mechanism is installed on the box body, and the central control mechanism is installed on the box body. And the fan, the spray head and the monitoring mechanism are electrically connected with the central control mechanism. The device has the effect that the blowing-off effect on small impurities is further improved.

Description

Technical Field

[0001] The present application relates to the field of tobacco processing equipment, and in particular to a tobacco leaf impurity removal and air separation device. Background Art

[0002] The tobacco leaf impurity removal air separation device is a device used to separate tobacco leaves from impurities (such as stems, debris, dust and other non-tobacco substances) mixed in the tobacco leaves during tobacco processing. This device uses wind power to separate tobacco leaves and impurities because they have different suspension speeds in the airflow.

[0003] Usually, some impurities with smaller mass and tobacco leaves with larger mass are mixed together. When the tobacco leaves are cleaned, the impurities with smaller mass are blown out by wind force, thereby achieving separation of impurities and tobacco leaves.

[0004] Existing tobacco leaf impurity removal and air selection devices usually use a fan to blow air on the tobacco leaves. However, since the impurities are usually small, when the fan is used to blow off the impurities, the wind blown by the fan is relatively scattered, resulting in poor effect in blowing off impurities located in a certain part of the tobacco leaves. Summary of the invention

[0005] In order to further improve the effect of blowing off smaller impurities, the present application provides a tobacco leaf impurity removal and air selection device.

[0006] The tobacco leaf impurity removal and air separation device provided in this application adopts the following technical solution: A tobacco leaf impurity removal and air selection device comprises an air selection box, a monitoring mechanism and an air selection mechanism, wherein a feeding mechanism is installed on the air selection box, and the monitoring mechanism is installed on the feeding mechanism. The monitoring mechanism is used to monitor impurities in tobacco leaves, and the air selection mechanism is installed in the box body, and a material receiving mechanism is installed in the air selection box body. The air selection mechanism comprises a fan and a nozzle, and the fan is installed between one end of the feeding mechanism discharging and the material receiving mechanism. A plurality of nozzles are provided, and a plurality of the nozzles are installed at the air outlet of the fan. A central control mechanism is installed on the box body, and the fan, the nozzle and the monitoring mechanism are all electrically connected to the central control mechanism.

[0007] By adopting the above technical solutions, the monitoring mechanism can monitor the impurities inside the tobacco leaves in real time before they enter the air separation box, ensuring that the position and impurity distribution of each tobacco leaf can be accurately identified; the design of the fan and multiple nozzles allows the airflow to act on different positions on the surface of the tobacco leaves in a concentrated and uniform manner, avoiding the problem of poor blowing effect in some areas caused by the dispersion of airflow in traditional fans; the introduction of the central control mechanism realizes the coordinated control of the fan, nozzles and monitoring mechanism, making the entire air separation process more intelligent and automated, and improving the processing speed and reliability; the low feed design of the receiving mechanism helps to reduce the impact when the tobacco leaves fall, protect the integrity of the tobacco leaves, and facilitate the collection of tobacco leaves from which impurities have been removed.

[0008] In a specific possible implementation scheme, the monitoring mechanism includes a bracket, a monitoring camera and a light source, the bracket is mounted on the feeding mechanism, the monitoring camera is mounted on the bracket, the monitoring camera is facing the feeding mechanism, the light source is mounted on the bracket, and the detection camera is electrically connected to the central control mechanism.

[0009] By adopting the above technical solutions, the installation of the bracket ensures the position stability and accuracy of the monitoring camera and light source; the monitoring camera can capture the image of tobacco leaves on the feeding mechanism in real time and effectively identify impurities therein; the use of light source enhances the imaging effect and improves the monitoring accuracy; the electrical connection between the detection camera and the central control mechanism realizes the automation of data transmission and processing, making the entire system more intelligent and efficient.

[0010] In a specific feasible implementation scheme, a partition is installed at the outlet of the fan, and the nozzle is installed on the partition through a telescopic adjustment device. The telescopic adjustment device includes a solenoid valve, a mounting seat and a telescopic tube. The mounting seat is installed on the partition, and a slide groove is provided on the mounting seat. The slide groove penetrates the mounting seat, and a through hole is provided on the partition corresponding to the slide groove. The telescopic tube is slidably connected in the slide groove, and a stop valve is installed at the lower end of the telescopic tube.

[0011] By adopting the above technical solution, the nozzle can be telescopically adjusted at the air outlet of the fan, so as to adjust the spray distance according to the tobacco leaves and impurities in different positions. Specifically, the telescopic tube can move freely in the slide slot, and its extension or retraction position is controlled by the solenoid valve to ensure that each nozzle can be accurately aimed at the area to be treated. At the same time, the design of the stop valve can effectively prevent gas leakage when not in use, ensure the concentration and stability of the airflow, and improve the efficiency and accuracy of air selection. In addition, the design is also easy to maintain and clean, which improves the overall reliability and service life of the device. In a specific feasible implementation scheme, the stop valve includes a support frame, a limit spring and a wind shield, the support frame is installed on the inner wall of the telescopic tube air outlet, the wind shield is hinged on the inner wall of the telescopic rod at the upper end of the support frame, one end of the limit spring is fixedly connected to the support frame, and the other end of the limit spring is fixedly connected to the lower plate surface of the wind shield.

[0012] By adopting the above technical scheme, the setting of the support frame enables the wind shield to be stably installed on the inner wall of the telescopic tube air outlet, ensuring the stability and reliability of the structure; the wind shield is hinged on the inner wall of the telescopic rod at the upper end of the support frame, and the angle can be adjusted as needed to flexibly respond to different wind force requirements; one end of the limit spring is fixedly connected to the support frame, and the other end is fixedly connected to the lower plate surface of the wind shield, which can automatically open the wind shield when the fan starts and quickly close when the fan stops working. On the one hand, it can ensure that the telescopic tube can slide out of the mounting seat normally, and on the other hand, it can prevent external dust from entering the system, thereby improving the cleanliness of the system.

[0013] In a specific feasible implementation scheme, a plurality of support frames, limit springs and wind shields are provided, and the plurality of limit frames are evenly installed on the circumferential portion of the inner wall of the telescopic tube. The limit springs and wind shields are provided correspondingly, and the plurality of wind shields can be spliced ​​together to form a complete circular plate to seal the telescopic tube.

[0014] By adopting the above technical solution, the arrangement of multiple support frames, limit springs and windshields makes the internal structure of the telescopic tube more stable and can effectively prevent airflow leakage. At the same time, the complete circular plate formed by splicing several windshields can completely block the telescopic tube when needed, ensuring the concentration of airflow during the air selection process and improving the effect of blowing off impurities in the tobacco leaves. In addition, the evenly distributed limit frames and corresponding limit spring designs make the actions of each windshield coordinated and consistent, further improving the working reliability and efficiency of the device.

[0015] In a specific feasible implementation scheme, a slider is provided on the outer side wall of the telescopic tube, a limiting groove is provided on the inner side wall of the mounting seat slide groove, a limiting rod is provided in the limiting groove along the length direction of the slide groove, the slider is slidably connected to the limiting rod, a return spring is sleeved on the limiting rod, and one end of the return spring is fixedly connected to the limiting rod, and the other end of the return spring is fixedly connected to the slider.

[0016] By adopting the above technical solution, the slider arranged on the outer wall of the telescopic tube can slide on the limit rod in the limit groove, ensuring that the telescopic tube remains stable during the telescopic process, avoiding the influence of the winnowing effect due to deviation or shaking. At the same time, the design of the reset spring enables the telescopic tube to automatically reset when it is retracted, improving the overall reliability and operational convenience of the device.

[0017] In a specific implementation scheme, there are two limit grooves, which are symmetrically arranged on both sides of the inner wall of the slide groove, and two sliding blocks installed on the telescopic tube are correspondingly arranged, and a limit rod and a return spring are arranged in each of the slide grooves.

[0018] By adopting the above technical solution, the stability of the telescopic tube in the slide is improved, ensuring the accuracy and reliability of the nozzle when adjusting the position. At the same time, the two symmetrically arranged limit slots and the corresponding slider design effectively prevent the telescopic tube from deflecting during movement, enhancing the structural strength of the entire device. The design of the reset spring enables the telescopic tube to quickly return to its original position after being acted upon by external forces, ensuring the consistency and continuity of the air selection process.

[0019] In a specific possible implementation scheme, it also includes a feed bin, the feeding mechanism is configured as a conveyor belt, one end of the conveyor belt is connected to the air separation box, the monitoring mechanism is located above one end of the conveyor belt adjacent to the air separation box, and the feed bin is installed at the end of the conveyor belt facing away from the air separation box.

[0020] By adopting the above technical scheme, the setting of the feed bin allows the tobacco leaves to be processed to be stored in a centralized manner, which is convenient for continuous supply to the conveyor belt, thereby improving the degree of production automation; the design of the conveyor belt not only facilitates the transportation of tobacco leaves, but also can maintain the stable state of the tobacco leaves during the transmission process, ensuring that the monitoring mechanism can accurately detect impurities in the tobacco leaves; the monitoring mechanism is located above one end of the conveyor belt adjacent to the air separation box, and can timely monitor the tobacco leaves that are about to enter the air separation process in real time, ensuring the accuracy and effectiveness of subsequent air separation operations; the entire system has a compact and reasonable structure, and the various components work together, which significantly improves the overall efficiency and reliability of tobacco leaf impurity removal.

[0021] In a specific possible implementation scheme, the material receiving mechanism includes a material receiving slide, and the material receiving slide is installed in the air separation box. The feeding end of the material receiving slide is arranged lower than the discharge end of the feeding mechanism.

[0022] By adopting the above technical solution, the feeding end of the receiving slide is set lower than the discharge end of the feeding mechanism, which can effectively reduce the impact force when the tobacco leaves fall, and avoid the tobacco leaves being damaged or generating new impurities due to impact. At the same time, the lower feeding end helps to smoothly guide the tobacco leaves into the receiving slide, ensuring that the tobacco leaves are smoothly collected into the receiving bin, and improving the working efficiency and reliability of the entire device.

[0023] In a specific possible implementation scheme, it also includes a material receiving bin, which is installed at the lower part of the air separation box between the material outlet of the feeding mechanism and the material inlet of the material receiving slide.

[0024] By adopting the above technical solution, the setting of the receiving bin allows tobacco leaves to fall directly into the receiving bin after the air selection process, avoiding tobacco leaf loss or secondary contamination caused by improper falling position. At the same time, the location of the receiving bin is reasonably designed, ensuring that tobacco leaves can smoothly transition from the discharge port of the feeding mechanism to the feeding port of the receiving slide, improving the operating efficiency and reliability of the entire system.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The monitoring agency monitors the impurities in the tobacco leaves in real time through monitoring cameras, ensuring that the fan and nozzle can accurately locate and concentrate on blowing away impurities at specific locations, thereby improving the impurity removal effect; 2. The fan is used in combination with multiple nozzles to make the airflow more concentrated and stable, effectively solving the problem of airflow dispersion of the fan in the prior art and enhancing the ability to remove small impurities; 3. The central control mechanism uniformly controls the working status of the fan, nozzle and monitoring mechanism, realizes intelligent operation, and improves the operating efficiency and reliability of the overall equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view of an embodiment of the present application.

[0028] Figure 3 It is a structural schematic diagram that reflects the connection relationship between the telescopic adjustment device and the air selection mechanism.

[0029] Figure 4 for Figure 2 Enlarged view of part A.

[0030] Figure 5 It is an enlarged view of the monitoring mechanism in the embodiment of the present application.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. air separation box; 2. monitoring mechanism; 21. bracket; 22. monitoring camera; 23. light source; 3. air separation mechanism; 31. fan; 32. nozzle; 33. partition; 331. through hole; 4. feeding mechanism; 5. material receiving slide; 6. feeding bin; 7. central control mechanism; 8. telescopic adjustment device; 81. solenoid valve; 82. mounting seat; 821. slide groove; 822. limit groove; 823. limit rod; 824. reset spring; 83. telescopic tube; 831. slider; 84. stop valve; 841. support frame; 842. limit spring; 843. wind shield. DETAILED DESCRIPTION

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] The embodiment of the present application discloses a tobacco leaf impurity removal and air selection device.

[0034] like Figure 1 and Figure 2 As shown, the tobacco impurity removal and air separation device includes an air separation box 1, a monitoring mechanism 2 and an air separation mechanism 3, wherein a feeding mechanism 4 is installed on the air separation box 1, and the monitoring mechanism 2 is installed on the feeding mechanism 4. The monitoring mechanism 2 is used to monitor impurities in the tobacco leaves. The air separation mechanism 3 is installed in the box, and a material receiving mechanism is installed in the air separation box 1. The air separation mechanism 3 includes a fan 31 and a nozzle 32. The fan 31 is installed between the discharge end of the feeding mechanism 4 and the material receiving mechanism. A plurality of nozzles 32 are provided, and a plurality of nozzles 32 are installed at the air outlet of the fan 31. A central control mechanism 7 is installed on the box, and the fan 31, the nozzle 32 and the monitoring mechanism 2 are all electrically connected to the central control mechanism 7. A discharge port is provided on the air separation box 1 below the air separation mechanism 3.

[0035] The air separation box 1 is a closed rectangular structure made of metal sheet with good corrosion resistance and strength. The internal space of the air separation box 1 is large enough to accommodate the equipment and material flow path required for the entire impurity removal process. A door panel is provided on one side of the air separation box 1 to facilitate maintenance and cleaning of internal components.

[0036] The monitoring mechanism 2 includes a bracket 21, a monitoring camera 22 and a light source 23. The bracket 21 is mounted on the feeding mechanism 4, and the monitoring camera 22 is mounted on the bracket 21. The monitoring camera 22 faces the tobacco leaves on the feeding mechanism 4. The light source 23 is also mounted on the bracket 21, and the detection camera is electrically connected to the central control mechanism 7. The monitoring camera 22 can use a high-definition CCD camera to clearly capture the details of the tobacco leaf surface, and the light source 23 uses an LED light bar to provide sufficient lighting brightness to ensure that the camera obtains high-quality image information. The coordinated use of the monitoring camera 22 and the light source 23 enables the monitoring mechanism 2 to accurately identify impurities in tobacco leaves under various lighting conditions.

[0037] like Figure 3As shown, the air selection mechanism 3 includes a fan 31 and a nozzle 32. The fan 31 is installed between the discharging end of the feeding mechanism 4 and the receiving mechanism. A plurality of nozzles 32 are provided, and a plurality of nozzles 32 are installed at the air outlet of the fan 31. The fan 31 can select a high-pressure centrifugal fan 31, which has a large air volume and high air pressure and is suitable for long-term continuous operation. The nozzle 32 can adopt a slender nozzle with an adjustable spray angle, which can accurately aim at the impurities to be removed. The number of nozzles 32 can be adjusted according to actual needs. Generally, a plurality of nozzles 32 can be evenly arranged around the air outlet of the fan 31 to ensure that the airflow covers the entire working area.

[0038] The material receiving mechanism includes a material receiving slide 5, which is installed in the air separation box 1, and the feeding end of the material receiving slide 5 is set lower than the discharge end of the feeding mechanism 4. The material receiving slide 5 adopts an inclined design, so that the tobacco leaves slide naturally into the material receiving bin, reducing friction and improving transmission efficiency. The material receiving slide 5 can also be provided with an anti-slip texture to prevent tobacco leaves from piling up or getting stuck.

[0039] The receiving slide 5 is made of stainless steel, with a smooth surface that is not easy to adhere to dust and residue. The inclination angle of the receiving slide 5 can be adjusted according to actual needs to facilitate the smooth sliding of tobacco leaves into the receiving bin. The width of the receiving slide 5 is slightly larger than the width of the conveyor belt to ensure that all tobacco leaves can be effectively captured.

[0040] The receiving bin is also made of stainless steel and has a filter inside to intercept larger impurity particles. There is a discharge port at the bottom of the receiving bin, which is connected to the subsequent processing equipment to ensure that the tobacco leaves can be quickly transferred to the next process.

[0041] In addition, it also includes a feed bin 6, the feed mechanism 4 is set as a conveyor belt, one end of the conveyor belt is connected to the air separation box 1, the monitoring mechanism 2 is located above the end of the conveyor belt close to the air separation box 1, and the feed bin 6 is installed at the end of the conveyor away from the air separation box 1. The design capacity of the feed bin 6 is large, and a large amount of tobacco leaves to be processed can be loaded at one time, ensuring the continuity of production. A baffle can be set on the conveyor belt to prevent tobacco leaves from falling during transportation.

[0042] The feed bin 6 has a wide opening to facilitate workers to pour piles of tobacco leaves. A stirrer is provided inside the feed bin 6, which is driven by a motor to evenly disperse the tobacco leaves through rotating blades to prevent the occurrence of agglomeration. A funnel-shaped discharge port is provided at the bottom of the feed bin 6, which is connected to a conveyor belt to ensure that the tobacco leaves flow smoothly into the air separation box 1.

[0043] The feeding mechanism 4 is configured as a conveyor belt mechanism. The conveyor belt is made of wear-resistant rubber material with raised patterns on the surface to increase friction and prevent tobacco leaves from slipping during transportation. Guardrails are provided on both sides of the conveyor belt to prevent tobacco leaves from falling from the sides. The speed of the conveyor belt can be adjusted by a variable speed motor to adapt to different types and quantities of tobacco leaves.

[0044] like Figure 4 As shown, a partition 33 is installed at the outlet of the fan 31, and the nozzle 32 is installed on the partition 33 through a telescopic adjustment device 8. The telescopic adjustment device 8 includes a solenoid valve 81, a mounting seat 82 and a telescopic tube 83. The mounting seat 82 is installed on the partition 33. A slide groove 821 is provided on the mounting seat 82. The slide groove 821 penetrates the mounting seat 82. A through hole 331 is provided on the partition 33 corresponding to the slide groove 821. The telescopic tube 83 is slidably connected in the slide groove 821, and a stop valve 84 is installed at the lower end of the telescopic tube 83.

[0045] Specifically, the partition 33 is a flat metal plate, which is installed at the air outlet of the fan 31 and plays the role of separating the airflow. There are multiple through holes 331 on the partition 33, and the through holes 331 are connected to the slide groove 821 of the mounting seat 82. The telescopic tube 83 is made of high-strength stainless steel material, and the outer surface is smooth and easy to slide. The stop valve 84 includes a support frame 841, a limit spring 842 and a windshield 843. There are two support frames 841, which are installed on the inner side walls on both sides of the air outlet of the telescopic tube 83. There are two corresponding windshields 843, which are respectively hinged on the inner side walls on both sides of the telescopic rod at the upper end of the support frame 841. There are two corresponding limit springs 842, one end of the limit spring 842 is fixedly connected to the support frame 841, and the other end of the limit spring 842 is fixedly connected to the lower plate surface of the windshield 843.

[0046] The elastic coefficient of the limit spring 842 is moderate, and it can maintain a stable elastic force within a certain range, ensuring that the windshield 843 can be flexibly opened and closed. The windshield 843 is made of lightweight aluminum alloy material, which is light in weight and high in strength, and can quickly respond to changes in airflow. When the fan 31 is started, the airflow enters the telescopic tube 83, pushing the windshield 843 to open, and the airflow is ejected through the nozzle 32; when the fan 31 stops, the limit spring 842 pulls the windshield 843 back to the closed state to prevent the backflow of external air.

[0047] In order to further improve the flexibility and adaptability of the system, a slider 831 is provided on the outer wall of the telescopic tube 83, a limiting groove 822 is provided on the inner wall of the slide groove 821 of the mounting seat 82, a limiting rod 823 is provided in the limiting groove 822 along the length direction of the slide groove 821, the slider 831 is slidably connected to the limiting rod 823, and a return spring 824 is sleeved on the limiting rod 823, one end of which is fixedly connected to the limiting rod 823, and the other end is fixedly connected to the slider 831. In this way, the telescopic tube 83 can move freely in the slide groove 821 through the slider 831, so as to realize the dynamic adjustment of the position of the nozzle 32. The function of the return spring 824 is to restore the slider 831 to the initial position when the airflow weakens or disappears, so as to ensure the stability of the system.

[0048] like Figure 5 As shown, the central control mechanism 7 is integrated in a control cabinet, including components such as a processor, a power module, and a communication interface. The central control mechanism 7 receives data collected by the monitoring camera 22, analyzes the location and quantity of impurities in the tobacco leaves in real time, and controls the working state of the fan 31 and the nozzle 32 to realize an automated wind selection process. The central control mechanism 7 also has fault diagnosis and alarm functions. When the equipment is abnormal, it can issue an alarm in time to remind the operator to check and repair.

[0049] The implementation principle of a tobacco impurity removal and air selection device in the embodiment of the present application is as follows: through the real-time monitoring of the monitoring mechanism 2, the central control mechanism 7 can accurately identify the position and type of impurities in the tobacco leaves, and then adjust the working parameters of the fan 31 and the nozzle 32 according to the actual situation, such as wind speed, wind direction and spray angle, so as to achieve effective blowing off of impurities in specific positions. At the same time, the design of the material receiving mechanism ensures that the processed tobacco leaves can be collected smoothly and avoids secondary pollution. The overall system achieves the goals of automation and high efficiency, significantly improves the quality and efficiency of tobacco impurity removal, reduces labor costs, and improves production efficiency. By introducing the telescopic adjustment device 8, the position of the nozzle 32 can be made more flexible and changeable, and the angle and distance of the nozzle 32 can be adjusted according to actual needs, so as to more effectively deal with different types of impurities. In particular, for those impurities distributed at the edges or corners of tobacco leaves, a more accurate blowing off effect can be achieved by dynamically adjusting the position of the nozzle 32. This design not only improves the impurity removal accuracy, but also enhances the robustness of the system, so that it can better adapt to complex working conditions. The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tobacco leaf impurity removal and air selection device, characterized in that: The invention comprises an air separation box (1), a monitoring mechanism (2) and an air separation mechanism (3); a feeding mechanism (4) is installed on the air separation box (1); the monitoring mechanism (2) is installed on the feeding mechanism (4); the monitoring mechanism (2) is used to monitor impurities in tobacco leaves; the air separation mechanism (3) is installed in the box; a material receiving mechanism is installed in the air separation box (1); the air separation mechanism (3) comprises a fan (31) and a nozzle (32); the fan (31) is installed between one end of the feeding mechanism (4) discharging material and the material receiving mechanism; a plurality of nozzles (32) are provided; and a plurality of nozzles (32) are installed at the air outlet of the fan (31); a central control mechanism (7) is installed on the box; the fan (31), the nozzle (32) and the monitoring mechanism (2) are all electrically connected to the central control mechanism (7).

2. The tobacco leaf impurity removal and air selection device according to claim 1 is characterized in that: The monitoring mechanism (2) comprises a bracket (21), a monitoring camera (22) and a light source (23); the bracket (21) is mounted on the feeding mechanism (4); the monitoring camera (22) is mounted on the bracket (21); the monitoring camera (22) faces the feeding mechanism (4); the light source (23) is mounted on the bracket (21); and the detection camera is electrically connected to the central control mechanism (7).

3. The tobacco leaf impurity removal and air selection device according to claim 1 is characterized in that: A partition (33) is installed at the outlet of the fan (31), and the nozzle (32) is installed on the partition (33) through a telescopic adjustment device (8). The telescopic adjustment device includes a solenoid valve (81), a mounting seat (82) and a telescopic tube (83). The mounting seat (82) is installed on the partition (33). A slide groove (821) is provided on the mounting seat (82). The slide groove (821) penetrates the mounting seat (82). A through hole (331) is provided on the partition (33) corresponding to the slide groove (821). The telescopic tube (83) is slidably connected in the slide groove (821). A stop valve (84) is installed at the lower end of the telescopic tube (83).

4. The tobacco leaf impurity removal and air selection device according to claim 3 is characterized in that: The stop valve (84) comprises a support frame (841), a limit spring (842) and a wind shield (843); the support frame (841) is mounted on the inner wall of the air outlet of the telescopic tube (83); the wind shield (843) is hinged on the inner wall of the telescopic tube (83) at the upper end of the support frame (841); one end of the limit spring (842) is fixedly connected to the support frame (841); and the other end of the limit spring (842) is fixedly connected to the lower plate surface of the wind shield (843).

5. The tobacco leaf impurity removal and air selection device according to claim 4, characterized in that: A plurality of the support frames (841), the limit springs (842) and the wind shields (843) are provided. The plurality of the limit frames are evenly installed on the circumferential portion of the inner wall of the telescopic tube (83). The limit springs (842) and the wind shields (843) are provided correspondingly. The plurality of the wind shields (843) can be spliced ​​together to form a complete circular plate to seal the telescopic tube (83).

6. The tobacco leaf impurity removal and air selection device according to claim 3, characterized in that: A slider (831) is arranged on the outer wall of the telescopic tube (83), a limiting groove (822) is arranged on the inner wall of the slide groove (821) of the mounting seat (82), a limiting rod (823) is arranged in the limiting groove (822) along the length direction of the slide groove (821), the slider (831) is slidably connected to the limiting rod (823), a return spring (824) is sleeved on the limiting rod (823), one end of which is fixedly connected to the limiting rod (823), and the other end of the return spring (824) is fixedly connected to the slider (831).

7. The tobacco leaf impurity removal and air selection device according to claim 6, characterized in that: There are two limit grooves (822), which are symmetrically arranged on both sides of the inner wall of the slide groove (821). Two sliding blocks (831) installed on the telescopic tube (83) are correspondingly arranged. A limit rod (823) and a return spring (824) are arranged in each of the slide grooves (821).

8. The tobacco leaf impurity removal and air selection device according to claim 1, characterized in that: It also includes a feed bin (6), the feed mechanism (4) is configured as a conveyor belt, one end of the conveyor belt is connected to the air separation box (1), the monitoring mechanism (2) is located above one end of the conveyor belt adjacent to the air separation box (1), and the feed bin (6) is installed at the end of the conveyor belt facing away from the air separation box (1).

9. The tobacco leaf impurity removal and air selection device according to claim 1, characterized in that: The material receiving mechanism comprises a material receiving slide (5), the material receiving slide (5) is installed in the air separation box (1), and the feeding end of the material receiving slide (5) is arranged lower than the discharge end of the feeding mechanism (4).

10. The tobacco leaf impurity removal and air selection device according to claim 9, characterized in that: It also includes a material receiving bin, which is installed at a position below the air separation box (1) between the material outlet of the feeding mechanism (4) and the material inlet of the material receiving slide (5).

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