Cigarette making machine stem sliver and shred content online automatic metering control system

Abstract

The invention relates to the technical field of tobacco machinery, in particular to a cigarette making machine stem sliver and shred content online automatic metering control system. The system comprises a tobacco stem conveying pipeline, a winnowing device, a tobacco stem and tobacco shred weighing assembly, a recycling pipeline and a control system. The core of the method is as follows: a material is switched on and off through a feeding control valve, so that a mixture enters a winnowing device, and tobacco stems and tobacco shreds respectively fall into corresponding weighing funnels for static weighing after gravity settling and winnowing separation; after the weighing is stable, the system automatically reads data and calculates the sliver rejecting amount and the cut tobacco content; and then a recovery pipeline is opened, the tobacco stems are discharged to a dust removal system through negative pressure and blowing, and the tobacco shreds are recovered to a tobacco shred pre-supply system for reutilization. According to the invention, on-line, automatic and real-time metering and data feedback of the sliver rejecting amount and the cut tobacco content are realized, the problems of lagging and inaccuracy of manual adjustment and waste of raw materials are effectively solved, the control precision and the production efficiency are remarkably improved, and the consumption of auxiliary materials is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tobacco machinery, in particular to a stem and cut filler rate online automatic metering control system of a cigarette making machine. BACKGROUND

[0002] In the process of cigarette production, the rejected tobacco stems often contain some qualified cut filler, which is usually referred to as stem and cut filler. At present, the detection and regulation of the stem and cut filler rate of the ZJ119 cigarette making machine mainly rely on manual operation. Specifically, the operator needs to manually take the stem and cut filler sample rejected by the cigarette making machine, and then use a special stem and cut filler sorting device to sort and meter the sample in the laboratory to calculate the amount of stem and cut filler rejection and the stem and cut filler rate. According to the laboratory measurement results, the air door opening and the frequency of the air blower of the cigarette making machine are manually adjusted.

[0003] This manual method has significant limitations. First, manual adjustment is uncertain, and laboratory data cannot be accurately fed back to parameter adjustment in the production process, resulting in control lag. Second, due to the difference in the amount of stems contained in different batches of cut filler raw materials, the air door opening and the frequency of the air blower need to be adjusted frequently, which is difficult for the manual mode to respond in time.

[0004] In actual production, there is a lack of real-time online calculation and feedback mechanism for the amount of stem and cut filler rejection and the stem and cut filler rate. Process personnel must repeatedly perform the cycle of "adjusting parameters, sampling, weighing, air selection, measuring, and adjusting again" to finally make the amount of stem and cut filler rejection meet the process requirements. The process is tedious and inefficient. In addition, the qualified cut filler contained in the rejected tobacco stems cannot be recycled online, directly leading to waste of raw materials.

[0005] To solve the above problems, the industry has tried to add scale lines to the air door opening adjustment rod and preset the frequency parameters of the air blower, aiming to match fixed process parameters for different brands of cut filler production. However, practice shows that even for the production of the same brand of cut filler, the amount of stem and cut filler rejection and the stem and cut filler rate still fluctuate greatly under the same preset parameters, and this method is not ideal. SUMMARY

[0006] Therefore, the present application provides a stem and cut filler rate online automatic metering control system of a cigarette making machine, aiming to solve the problems of large process parameter adjustment error, control lag, and waste of raw materials caused by the inability to recycle effective cut filler in the tobacco stems online due to the lack of real-time and automatic stem and cut filler rejection and rate data in the prior art, thereby improving the automation control level of the stem and cut filler rejection process of the cigarette making machine, the accuracy and timeliness of the process parameter setting, and reducing the consumption of raw and auxiliary materials in the production process.

[0007] To achieve the above purpose, the present application adopts the following technical solutions:

[0008] A stem plug and cut tobacco ratio on-line automatic metering control system, characterized in that it comprises:

[0009] A tobacco stem conveying pipeline, wherein a feeding control valve is arranged on the tobacco stem conveying pipeline to control the conveying and on-off of the tobacco stem and cut tobacco mixture;

[0010] An air separation device, wherein an inlet of the air separation device is connected with the tobacco stem conveying pipeline to receive the mixture; the air separation device comprises a gravity settling chamber and a sorting device, the gravity settling chamber is used for preliminary screening of the mixture, and the sorting device separates cut tobacco from the mixture by using air pressure;

[0011] A tobacco stem weighing assembly, comprising a tobacco stem weighing hopper and a tobacco stem weighing scale, wherein a tobacco stem feeding port is arranged at the top of the tobacco stem weighing hopper, the tobacco stem feeding port is connected with a tobacco stem outlet of the sorting device through a tobacco stem connecting pipeline, and a tobacco stem air outlet is arranged on the side of the tobacco stem weighing hopper;

[0012] A cut tobacco weighing assembly, comprising a cut tobacco weighing hopper and a cut tobacco weighing scale, wherein a cut tobacco feeding port is arranged at the top of the cut tobacco weighing hopper, the cut tobacco feeding port is connected with a cut tobacco outlet of the sorting device through an air release device, and a cut tobacco air outlet is arranged on the side of the cut tobacco weighing hopper;

[0013] A recycling pipeline, comprising a tobacco stem recycling pipeline and a cut tobacco recycling pipeline, wherein the tobacco stem recycling pipeline is connected with the tobacco stem air outlet, and the cut tobacco recycling pipeline is connected with the cut tobacco air outlet; and

[0014] A control system, which is electrically connected with the feeding control valve, the air separation device, the tobacco stem weighing scale, the cut tobacco weighing scale and the recycling pipeline.

[0015] In a specific implementation, a V-shaped structure is arranged above the tobacco stem feeding port of the tobacco stem weighing hopper and above the cut tobacco feeding port of the cut tobacco weighing hopper, and a non-contact cover plate is arranged above the V-shaped structure.

[0016] In a specific implementation, ventilation holes are arranged on the side wall opposite to the side wall provided with the air outlet of the cavity of the tobacco stem weighing hopper and the cut tobacco weighing hopper.

[0017] In a specific implementation, the connection between the tobacco stem recycling pipeline and the tobacco stem air outlet and the connection between the cut tobacco recycling pipeline and the cut tobacco air outlet are both in the shape of a horn mouth, and a predetermined gap is maintained between the horn mouth and the corresponding weighing hopper to form a non-contact connection.

[0018] In one specific implementation, the system further includes a jetting device, the jetting device having a jetting nozzle corresponding to the sidewall of the tobacco stem weighing funnel and the tobacco shred weighing funnel provided with the ventilation hole, for providing positive pressure airflow into the funnel during material recovery.

[0019] In one specific implementation, the sorting device includes a negative pressure generator and a proportional valve for adjusting the air separation pressure.

[0020] In one specific implementation, the venting device is a double-layer pipe structure, with holes in the inner pipe wall.

[0021] In one specific implementation, the system further includes a fixed base plate and a shock-absorbing block disposed below the base plate, wherein the tobacco stem weighing platform and the tobacco shred weighing platform are disposed on the base plate.

[0022] In one specific implementation, the control system is configured to perform the following operations:

[0023] The feed control valve is opened to transport the mixture to the air classifier;

[0024] After the preset feeding time is reached, the feeding control valve is closed to stop feeding;

[0025] After the weighing platform for tobacco stems and the weighing platform for tobacco shreds are stabilized, the weight data of tobacco stems and tobacco shreds are read, and the amount of stems removed and the shred content in the stems are calculated based on the data.

[0026] The tobacco stem recovery pipe and the tobacco shred recovery pipe are opened by controlling the opening of the pipe, and the weighed tobacco stems and shreds are sucked away separately.

[0027] In one specific implementation, the control system is further configured to: transport tobacco shreds through the tobacco shreds recycling pipe to the VE pre-feeding system of the cigarette machine for recycling, and transport tobacco stems through the tobacco stems recycling pipe to a centralized dust removal system for processing.

[0028] Compared with existing technologies, the present invention provides an online automatic metering and control system for cigarette machine stems and tobacco shreds. This system automatically performs air separation, weight measurement, tobacco shred calculation, and material recovery of the stem-shred mixture online. It achieves efficient separation of stems and tobacco shreds through an air separation unit containing a gravity settling chamber and a sorting device. Static precision weighing is performed using separately installed stem and tobacco weighing funnels and corresponding weighing platforms. Automatic and smooth material recovery is achieved through a recovery pipeline designed without contact with the weighing funnels. This system enables real-time, automatic, and online metering and data feedback of the amount of stems removed and the tobacco shred content in the stems, while also achieving automatic recovery and reuse of effective tobacco shreds from the stems. This system effectively improves the accuracy and timeliness of the stem removal process parameters in cigarette machines, significantly reduces raw material waste caused by lag and inaccuracy in manual adjustments, and improves the automation level of the production process. It has the following beneficial effects:

[0029] 1. By controlling the opening and closing of the material conveying pipeline, the weighing process is carried out in a static and undisturbed environment. Combined with the hopper structure design, the accuracy and stability of the weighing data are guaranteed, providing a reliable basis for accurately calculating the efficiency of stem removal and the fiber content.

[0030] By controlling the opening and closing of the valve, the material flow is temporarily cut off during weighing, isolating the weighing platform from the dynamic conveying system, thereby creating a stable static benchmark for weighing and eliminating the influence of continuous airflow and material impact on weighing accuracy.

[0031] 2. By combining gravity settling with an air separation device, and with automatic adjustment of the air separation pressure, the tobacco stems and tobacco shreds can be separated efficiently and thoroughly, improving the sorting effect and creating conditions for subsequent separate metering and tobacco shred recycling.

[0032] The gravity settling chamber first performs preliminary screening of the mixture (removing large tobacco stems), and the sorting device then uses density difference for fine air separation. The "automatic adjustment of air separation pressure" (through a proportional valve) can adapt to different working conditions, ensuring that the effect of "complete separation" or "sufficient separation" can be achieved under different incoming material conditions, which forms the basis for subsequent accurate measurement of the fiber content.

[0033] 3. Through the V-shaped feed inlet, non-contact cover plate, and hopper design with holes on one side and connection on the other, it ensures that the material flows smoothly into the weighing hopper and can be smoothly and completely sucked out under negative pressure, thus achieving a balance between smooth material flow and accurate weighing.

[0034] The "V-shaped structure" and "non-contact cover" correspond to "adding a V-shaped structure above the tobacco weighing funnel and the tobacco stem weighing funnel" and "adding a non-contact cover above," respectively, and their function is to guide the flow and prevent splashing. "One-sided perforation and one-sided connection" clearly corresponds to "ventilation perforation on one side of the tobacco weighing funnel and the tobacco stem weighing funnel, and the other side serving as a blowing port" as well as the connection design between the recycling pipe and the air outlet. The synergistic effect of these designs solves the key problem of materials "getting in, weighing accurately, and getting out smoothly."

[0035] 4. Through the design of a non-contact recycling pipeline with a funnel shape and a gap between it and the weighing funnel, combined with a blower, the rapid, thorough and residue-free recycling of tobacco stems and shredded tobacco after weighing is achieved. The tobacco stems are sent to a centralized dust removal system, and the shredded tobacco is reused in the pre-feeding system, which directly reduces the consumption of auxiliary materials.

[0036] The "trumpet shape" and "maintaining a gap without contact" refer to the fact that "the tobacco stem and tobacco shred recovery pipe is trumpet shaped to ensure that it does not contact the weighing funnel, and a 10mm gap is maintained between them"; "combined with a blowing device" refers to "providing blowing, providing positive pressure air on the other side of the funnel for blowing". These designs ensure that the recovery force does not directly act on the weighing funnel, avoiding weighing interference. At the same time, the combination of positive pressure blowing and negative pressure suction achieves efficient and thorough material emptying.

[0037] 5. The entire system automates the entire process from sampling, sorting, weighing, calculation to recycling, and can provide accurate data for adjusting damper opening and fan frequency in real time, reducing manual intervention and improving production efficiency and control accuracy.

[0038] The system automatically controls the "control valve" to complete sampling, which is then automatically sorted by the "air classifier" and weighed by the "weighing platform". The control system automatically "calculates the amount of stems to be removed and the fiber content in the stems", and finally automatically opens the "recovery control valve and the jet solenoid valve" to complete the material recovery. This series of automated steps makes real-time data feedback and data-based parameter adjustment (damper opening, fan frequency) possible, replacing the original manual operation mode. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0040] Figure 1 This is a flowchart of an online automatic metering and control system for cigarette machine stems and filament content, as described in this invention.

[0041] Figure 2 This is a schematic diagram of the material supply section.

[0042] Figure 3 This is a schematic diagram of the overall structure of the device.

[0043] Figure 4 This is a side view of the air separation device.

[0044] Figure 5 This is a side view of the venting device structure.

[0045] Figure label:

[0046] Figure 2 In the middle, 31. Feed hopper, 32. Pneumatic conveyor, 33. Feed control valve, 34. System operation control valve, 35. Tobacco stem conveying pipeline, 36. Fixed support;

[0047] Figures 3-5 The components are: 1. Air-separating air conveyor; 2. Tobacco conveying pipe; 3. Air separation device; 4. Tobacco stem weighing funnel cover plate; 5. Tobacco stem weighing funnel; 6. Tobacco stem weighing platform; 7. Fixed base plate; 8. Shock-absorbing block; 9. Air venting device; 10. Tobacco stem weighing funnel; 11. Tobacco stem weighing funnel cover plate; 12. Tobacco stem weighing platform; 13. Tobacco stem connecting pipe; 14. Gravity settling chamber; 15. Tobacco stem connecting pipe; 16. Tobacco stem recycling pipe; 17. Tobacco stem recycling air conveyor; 18. Tobacco stem recycling control valve; 19. Tobacco stem recycling pipe; 20. Tobacco stem recycling air conveyor; 21. Tobacco stem recycling control valve. Detailed Implementation

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] like Figure 1 , Figure 2 , Figure 3 As shown, the overall structure of the cigarette machine stem stick and filament content online automatic metering and control system of the present invention can be referred to... Figure 2 and Figure 3 It mainly includes: a feeding unit, an air separation and weighing unit, and a recycling unit, and is uniformly coordinated and controlled by an integrated control system.

[0050] First, please refer to Figure 2The feeding section is shown. This section mainly includes a hopper 31, a pneumatic conveyor 32, a feed control valve 33, a system operation control valve 34, a tobacco stem conveying pipe 35, and a fixed support 36. The feed control valve 33 is a key component of this system, used to precisely control whether the mixture of tobacco stems and shredded tobacco from the cigarette machine enters the subsequent air separation and weighing unit. The pneumatic conveyor 32 is a negative pressure generator, its function being to generate negative pressure to adsorb and circulate the material to the next process step. The system operation control valve 34 is a three-way valve, controlling whether the conveyed tobacco stems directly enter the dust collector (which is suctioned by negative pressure). It serves as a backup solution; if blockage occurs, the pneumatic conveyor 32 and the system operation control valve 34 are opened directly. Under normal circumstances, the pneumatic conveyor 32 and the system operation control valve 34 are controlled synchronously. When the pneumatic conveyor 32 is open, the feed control valve 33 is no longer connected to the atmosphere and is directly open, indicating that material is being supplied. When the pneumatic conveyor 32 is closed, the feed control valve 33 is connected to the atmosphere, indicating that material supply has stopped. The system operation control valve 34 is a spare part. Its function is to connect to the dust removal pipe (the dust removal pipe of the equipment itself) to remove dust if abnormalities such as blockage occur. Under normal circumstances, it is directly open. After connecting to the dust removal pipe, combined with the pneumatic conveyor 32 being open and the feed control valve 33 being directly open, the machine returns to its original function. The subsequent sorting will no longer be effective.

[0051] Please refer to the following: Figure 3 and Figure 4 , Figure 3 The system's core air separation, weighing, and recovery structure is demonstrated. Air separation device 3 is the core separation component of this system; its inlet is connected to... Figure 2 The material supply section is connected. Figure 4 This more clearly demonstrates the internal structure of the air classifier 3, which integrates a gravity settling chamber 14 and a sorting device. After entering through the inlet, the mixture undergoes preliminary screening in the gravity settling chamber 14, relying on gravity to settle the denser tobacco stems. The remaining mixture enters the sorting area, where the sorting device utilizes a negative pressure airflow generated by the air classifier conveyor 1 and precisely regulated by a proportional valve to perform fine separation based on the density difference between tobacco shreds and tobacco stems, drawing away the lighter tobacco shreds and separating them from the heavier tobacco stems. The tobacco stem outlet of the air classifier 3 is connected to the tobacco stem weighing component via a tobacco stem connecting pipe 15, while its tobacco shred outlet is connected to the venting device 9 via a tobacco shred conveying pipe 2, and then leads to the tobacco shred weighing component via a tobacco shred connecting pipe 13.

[0052] For the specific structure of the venting device 9, please refer to [link / reference needed]. Figure 5 It features a double-layered pipe structure, with several holes in the inner wall. This design allows some of the airflow to escape through the holes during tobacco transport, effectively reducing the tobacco's flow velocity and ensuring a smooth descent. This prevents the tobacco from splashing inside the weighing funnel due to airflow impact, thus ensuring the stability of the weighing environment and the accuracy of the data.

[0053] The tobacco stem weighing assembly consists of a tobacco stem weighing funnel 5 and a tobacco stem weighing platform 6. The tobacco shred weighing assembly consists of a tobacco shred weighing funnel 10 and a tobacco shred weighing platform 12. Both weighing funnels have a V-shaped structure above their top inlets, and are equipped with non-contact tobacco stem weighing funnel covers 4 and tobacco shred weighing funnel covers 11, respectively. This structure facilitates material introduction and prevents splashing. Both weighing funnels have air outlets on their sides; the tobacco stem outlet connects to the tobacco stem recycling pipe 16, and the tobacco shred outlet connects to the tobacco shred recycling pipe 19. Ventilation holes are provided on the funnel wall opposite the air outlet connected to the recycling pipe. The tobacco stem recycling pipe 16 is equipped with a tobacco stem recycling control valve 18 and a tobacco stem recycling pneumatic conveyor 17. The tobacco shred recycling pipe 19 is equipped with a tobacco shred recycling control valve 21 and a tobacco shred recycling pneumatic conveyor 20. The recovery pipe is connected to the air outlet of the weighing funnel in a funnel shape, maintaining a gap of approximately 10mm to achieve contactless operation. The system is also equipped with a jet-blowing device (not shown separately in the figure), whose nozzle is aimed at the side wall of the weighing funnel with ventilation holes. The entire air separation and weighing unit is mounted via a fixed base plate 7, with shock-absorbing blocks 8 located below the base plate to improve weighing stability.

[0054] The V-shaped structure is used to ensure that the material can slide down smoothly, with an inclination angle of 45-60 degrees, depending on the material.

[0055] The blowing action occurs after the negative pressure recovery. This can be adjusted by setting parameters, for example, adding 3 seconds of blowing after 3 seconds of negative pressure suction.

[0056] Description of the system's working principle and process.

[0057] The working principle of the system described in this invention is based on a combination of "intermittent static weighing" and "pneumatic conveying, separation, and recovery." Its automated operation process can be referred to... Figure 1 The flowchart is as follows:

[0058] Figure 1 In the flowchart shown, starting the cigarette machine is considered the beginning, and stopping the cigarette machine is considered the end. Figure 1 Data acquisition refers to collecting data, while data integration refers to integrating data from this system and other datasets, and completing data processing, storage, and organization.

[0059] The control system first receives the operating signal from the cigarette rolling machine. Once the cigarette rolling machine starts, the system begins operation.

[0060] Step 1: Material feeding and air separation

[0061] The control system closes the feed control valve 33, causing the tobacco stem weighing platform 6 and the tobacco shred weighing platform 12 to be zeroed. Then, the feed control valve 33 is opened, and the mixture of tobacco stems and shreds from the cigarette machine is conveyed to the air separator 3 through the tobacco stem conveying pipe 35 under negative pressure. Inside the air separator 3, the mixture undergoes preliminary screening in the gravity settling chamber 14, with larger tobacco stems settling down. The remaining mixture enters the sorting area, where the air separation pressure is controlled by adjusting the proportional valve of the sorting device, causing lighter shreds to be drawn away by the airflow, while heavier tobacco stems continue to fall. The separated tobacco stems fall into the tobacco stem weighing funnel 5 through the tobacco stem connecting pipe 15, while the separated tobacco shreds enter the degassing device 9 through the tobacco shred conveying pipe 2. The degassing device 9 has a double-layer perforated structure, which reduces the flow rate of the tobacco shreds and prevents them from flying around erratically. The tobacco shreds then fall smoothly into the tobacco shred weighing funnel 10. After the feeding process continues for a preset time (e.g., 30 seconds), the feed control valve 33 closes, stopping the feeding.

[0062] Step Two: Static Weighing and Calculation

[0063] After feeding stops, the system waits for a brief period of stabilization (e.g., by directly reading for 1-3 seconds without fluctuation) until the readings of the two weighing platforms stabilize. Subsequently, the control system automatically reads and records the weight data from the tobacco stem weighing platform 6 and the tobacco shred weighing platform 12. Based on this data, the system program automatically calculates the real-time stem removal rate (unit: g / min) and the shred content in the stems.

[0064] For example, when the equipment starts up, it begins to divide the time into 30-second intervals; stopping the incoming material marks the end of this interval (control valve 3); the 30-second interval can be set according to parameters.

[0065] The calculation formula includes:

[0066] Stem removal amount (g / min) = weight of tobacco stems accepted in this time period / time (in minutes);

[0067] "Steel content in stems" = weight of tobacco shreds received during the time period / (weight of tobacco shreds received during the time period + weight of tobacco stems received during the time period).

[0068] Step 3: Material Recycling

[0069] After the calculation is completed, the control system simultaneously opens the tobacco stem recovery control valve 18, the tobacco shred recovery control valve 21, and the blowing solenoid valve. The tobacco stem recovery pneumatic conveyor 17 and the tobacco shred recovery pneumatic conveyor 20 start, generating negative pressure in their respective recovery pipes. At the same time, the blowing device blows positive pressure airflow into the ventilation holes of the two weighing funnels. Under the combined action of negative pressure suction and positive pressure blowing, the tobacco stems in the tobacco stem weighing funnel 5 are quickly and thoroughly sucked into the tobacco stem recovery pipe 16 and transported to the factory's centralized dust removal system for processing; at the same time, the tobacco shreds in the tobacco shred weighing funnel 10 are sucked into the tobacco shred recovery pipe 19 and transported back to the VE pre-feeding system of the cigarette machine, realizing recycling and reuse.

[0070] Step 4: Run in a loop

[0071] After completing the weighing and recycling of materials, the system automatically repeats steps one through three, thereby achieving continuous online automatic metering and control.

[0072] Through the above process, this system achieves fully automated, high-frequency online detection of the amount of tobacco stems removed and the tobacco shred content in cigarette making machines. The obtained real-time data is fed back to the control system, which can then use PID control to automatically adjust parameters such as the damper opening and fan frequency of the cigarette making machine (if the amount of tobacco stems removed is too small, the damper is increased). Ultimately, this allows the cigarette making machine to remove as many tobacco stems as possible while minimizing the incorrect removal of qualified tobacco shreds, achieving the dual goals of optimizing the process and reducing consumption.

[0073] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An online automatic metering and control system for cigarette machine stems and filament content, characterized in that, include: A tobacco stem conveying pipeline, wherein a feed control valve is provided on the tobacco stem conveying pipeline for controlling the conveying and switching off of the mixture of tobacco stems and tobacco shreds; An air separation device, the inlet of which is connected to the tobacco stem conveying pipe, is used to receive the mixture; the air separation device includes a gravity settling chamber and a sorting device, the gravity settling chamber is used to perform preliminary screening of the mixture, and the sorting device uses air pressure to separate the tobacco shreds from the mixture; The tobacco stem weighing assembly includes a tobacco stem weighing funnel and a tobacco stem weighing platform. The top of the tobacco stem weighing funnel is provided with a tobacco stem inlet, which is connected to the tobacco stem outlet of the sorting device through a tobacco stem connecting pipe. The side of the tobacco stem weighing funnel is provided with a tobacco stem air outlet. The tobacco weighing assembly includes a tobacco weighing funnel and a tobacco weighing platform. The top of the tobacco weighing funnel is provided with a tobacco inlet, which is connected to the tobacco outlet of the sorting device through a venting device. The side of the tobacco weighing funnel is provided with a tobacco air outlet. The recycling pipeline includes a tobacco stem recycling pipeline and a tobacco shred recycling pipeline, wherein the tobacco stem recycling pipeline is connected to the tobacco stem outlet, and the tobacco shred recycling pipeline is connected to the tobacco shred outlet; and The control system is electrically connected to the feed control valve, the air separation device, the tobacco stem weighing platform, the tobacco shred weighing platform, and the recycling pipeline.

2. The online automatic metering and control system for cigarette machine stems and filament content as described in claim 1, characterized in that, The tobacco stem weighing funnel has a V-shaped structure above the tobacco stem inlet and the tobacco shred weighing funnel has a non-contact cover plate above the V-shaped structure.

3. The online automatic metering and control system for cigarette machine stems and filament content as described in claim 1, characterized in that, The cavities of the tobacco stem weighing funnel and the tobacco shred weighing funnel have ventilation holes on the opposite side wall of the side with the air outlet.

4. The online automatic metering and control system for cigarette machine stems and filament content as described in claim 1, characterized in that, The connection between the tobacco stem recycling pipe and the tobacco stem outlet, and the connection between the tobacco shred recycling pipe and the tobacco shred outlet, are both funnel-shaped, and a predetermined gap is maintained between the funnel and the corresponding weighing funnel to form a non-contact connection.

5. The online automatic metering and control system for cigarette machine stems and filament content as described in claim 1, characterized in that, The system also includes a jetting device, the jetting nozzle of which corresponds to the sidewall of the tobacco stem weighing funnel and the tobacco shred weighing funnel that is provided with the ventilation hole, for providing positive pressure airflow into the funnel when recycling materials.

6. The online automatic metering and control system for cigarette machine stems and filament content as described in claim 1, characterized in that, The sorting device includes a negative pressure generator and a proportional valve for adjusting the air separation pressure.

7. The online automatic metering and control system for cigarette machine stems and filament content as described in claim 1, characterized in that, The venting device has a double-layer pipe structure, with holes in the inner pipe wall.

8. The online automatic metering and control system for cigarette machine stems and filament content as described in claim 1, characterized in that, The system also includes a fixed base plate and a shock-absorbing block disposed below the base plate, and the tobacco stem weighing platform and the tobacco shred weighing platform are disposed on the base plate.

9. The online automatic metering and control system for cigarette machine stems and filament content as described in claim 1, characterized in that, The control system is configured to perform the following operations: The feed control valve is opened to transport the mixture to the air classifier; After the preset feeding time is reached, the feeding control valve is closed to stop feeding; After the weighing platform for tobacco stems and the weighing platform for tobacco shreds are stabilized, the weight data of tobacco stems and the weight data of tobacco shreds are read, and the amount of stems removed and the shred content in the stems are calculated based on the data. The tobacco stem and tobacco shred recovery pipes are opened by controlling the opening of the pipes, and the weighed tobacco stems and tobacco shreds are sucked away separately.

10. The online automatic metering and control system for cigarette machine stems and filament content as described in claim 9, characterized in that, The control system is further configured to: transport tobacco shreds through the tobacco shreds recycling pipe to the VE pre-supply system of the cigarette machine for recycling, and transport tobacco stems through the tobacco stems recycling pipe to the centralized dust removal system for processing.

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