A quick emptying device for a wind force wire feeder

Abstract

The utility model relates to a tobacco conveying equipment technical field, concretely relates to a kind of quick emptying device for wind force silk sending machine.The device includes buffer cavity, discharge port, flap door, emptying pipeline, airflow control system and controller, and buffer cavity top is communicated with feeding end and negative pressure conveying channel, and its side wall is equipped with discharge port, discharge port outside connects emptying pipeline.Flap door is hinged and installed in discharge port, for opening and forming flow guide slope when emptying.Airflow control system includes electromagnetic three-way valve and positive pressure, negative pressure gas source, electromagnetic three-way valve is connected with airflow conveying pipeline, and its positive and negative pressure passage is switched over by controller.In emptying process, controller first cuts off feeding, then controls flap door to open, and is disturbed by the alternation of positive pressure and negative pressure airflow, so that tobacco thread and residual tobacco are completely removed in non-contact state.The device has the advantages of simple structure, high cleaning efficiency, strong operation reliability and the like.

Description

Technical Field

[0001] This utility model relates to the technical field of tobacco conveying equipment, specifically to a rapid venting device for a pneumatic tobacco conveyor. Background Technology

[0002] The pneumatic tobacco feeder is a key piece of equipment in a cigarette production line, responsible for the stable and continuous transport of tobacco from the upstream feed belt to the downstream weighing, cutting, and cigarette processing stages. Its working principle relies on a fan generating a continuous negative pressure airflow inside the guide pipe. This airflow pulls the tobacco from upstream and transports it along the guide pipe to the subsequent processing unit.

[0003] Specifically, the tobacco first enters a feeding buffer chamber located inside the pneumatic tobacco feeder. The top of this chamber has a tobacco inlet for connecting to the discharge end of the upstream feeding belt. The lower part of the chamber is connected to a downstream guide pipe via a sealed structure, forming a closed negative pressure conveying system. Under the continuous operation of the fan, a stable negative pressure environment is maintained inside the buffer chamber, facilitating the smooth intake of the tobacco and its transport through the guide pipe, ensuring the continuity of the entire conveying process, airflow stability, and system airtightness.

[0004] However, in existing wind-powered tobacco feeding systems, the conveying path is usually long and inevitably includes multiple bends, connection interfaces and other structural areas. At these locations, the airflow often becomes turbulent, slows down or even stops, causing tobacco to easily get stuck, deposited or adhered, forming the so-called "twig hanging zone" or "residue zone".

[0005] As production time extends, the tobacco shreds in these "tobacco hanging areas" gradually accumulate, forming stubborn residue buildup. During batch changes, this residue can easily mix into the new batch, leading to increased contamination, reduced tobacco purity, and batch-to-batch inconsistencies, directly impacting cigarette quality stability and consumer experience. Furthermore, the accumulation of residue can clog conveyor channels, disrupting production line operations and increasing equipment failure risks and maintenance costs.

[0006] In the existing process, although tobacco purging is performed every time production batches change, the purging method mainly relies on continuous blowing airflow to remove residual tobacco after the feed belt stops. Because the conveyor airflow path is fixed, the problem of residual tobacco in multiple tobacco-hanging areas has not been completely resolved. Furthermore, the existing purging process requires the feed belt to stop first, but even after the feed belt stops, residual tobacco remains upstream of the buffer chamber. The existing purging method cannot remove this residue, requiring manual cleaning, which increases maintenance workload and production risks.

[0007] This application is submitted to address the aforementioned issues. Utility Model Content

[0008] To address the problems of incomplete cleaning of tobacco residue, difficulty in cleaning the tobacco hanging area, and the need for manual cleaning of residual material upstream of the buffer chamber after evacuation in the aforementioned background technology, the purpose of this utility model is to provide a rapid evacuation device for a pneumatic tobacco feeder. This device, through a flip-door structure that can be opened or closed by a motor, and in conjunction with the switching between positive and negative pressure airflow, achieves efficient discharge of residual tobacco and cleaning of the airflow in the tobacco hanging area, thereby reducing manual intervention and improving evacuation efficiency and equipment operational stability.

[0009] The technical solution of this application is as follows:

[0010] A rapid venting device for a wind-powered tobacco feeder is provided, comprising a buffer chamber 1, an airflow conveying pipe 11 connected to the top of the buffer chamber 1, a conveyor belt connected to the top of the buffer chamber 1, and an airflow source connected to the airflow conveying pipe. The top side of the buffer chamber 1 is provided with a discharge port 12, and a tobacco venting pipe 2 is connected to the outside of the discharge port.

[0011] A flip-up door 3 is hinged at the discharge port 12. The flip-up door 3 is hinged and installed through a pivot 31 that passes through the side wall of the buffer cavity 1.

[0012] The rotating shaft 31 is connected to a drive motor located on the outside of the cavity. The drive motor is used to drive the flip door 3 to open or close.

[0013] When the flap door 3 is opened, its free end 32 abuts against the limiting block 13 on the inner wall of the buffer cavity, forming a guide slope from the buffer cavity to the drain pipe.

[0014] When the flap door 3 is closed, its outer edge presses against the outer edge of the discharge port 12 to achieve airtight sealing.

[0015] Preferably, the outer periphery of the flip door 3 is provided with a sealing assembly, the sealing assembly including the flip door body 31 located in the middle layer, a hollow silicone strip covering the edge of the flip door body, and a magnetic strip embedded inside the hollow silicone strip.

[0016] Preferably, the limiting block 13 is disposed along the inner wall of the buffer cavity 1 and is a support structure disposed relative to the discharge port 12; the limiting block 13 is used to limit the rotation angle of the flap door when it is opened and to provide a stable guide slope.

[0017] Preferably, the guide ramp is inclined at 60±3° relative to the horizontal plane, and its guide surface is made of antistatic material or has an anti-adhesion coating to prevent tobacco from adhering to the inner wall.

[0018] Preferably, the tobacco venting pipe 2 is a tubular component with openings at both ends, and the opening size of the end connected to the discharge port 12 is larger than the discharge port size, so as to achieve a wrap-around connection and sealing fit of the discharge port.

[0019] Preferably, one end of the rotating shaft 31 protrudes from the side wall of the buffer cavity 1 and is connected to the drive end of the drive motor via a coupling. The drive motor is located outside the buffer cavity 1. The rotating shaft is supported by bearings to ensure the stability of the rotating shaft and realize the automatic opening and closing of the flip door.

[0020] Preferably, the tobacco venting pipe 2 includes: a front section that is a closed tubular structure with open ends, configured to prevent airflow leakage and ensure stable airflow to guide the tobacco shreds out smoothly; and a rear section that is an inclined open slope structure extending from the front tubular structure. This structure facilitates manual observation of the internal condition of the venting pipe and cleaning and maintenance, avoiding the difficulties in observation and cleaning caused by a completely closed structure.

[0021] Preferably, the device further includes an airflow source, a positive pressure branch pipe, a negative pressure branch pipe, an airflow delivery pipeline, and an electromagnetic three-way valve disposed between the positive pressure branch pipe, the negative pressure branch pipe, and the airflow delivery pipeline;

[0022] The device also includes a controller, which is electrically connected to the drive motor and the solenoid three-way valve. The controller is configured to: control the solenoid three-way valve to connect the positive pressure branch pipe and the airflow delivery pipe when the flap door 3 is open, and output positive pressure airflow; and control the solenoid three-way valve to connect the negative pressure branch pipe and the airflow delivery pipe after the flap door 3 is closed, and output negative pressure airflow.

[0023] Preferably, the edge of the discharge port 12 is provided with a magnetic adsorption element corresponding to the magnetic strip embedded in the outer periphery of the flap door 3. The magnetic adsorption element is an iron strip or other metal part 14 that can form an adsorption with the magnetic strip.

[0024] Because the flap door is hinged via a pivot that penetrates the side wall of the buffer cavity, a small gap inevitably exists between the pivot and the side wall of the cavity. This gap poses a certain risk of air leakage when the flap door is closed. To mitigate the impact of this structural gap on the overall sealing performance, this invention employs multiple sealing optimization measures:

[0025] First, the outer periphery of the flap door is equipped with a sealing assembly covered with hollow silicone strips and embedded with magnetic strips. When closed, it can form a flexible fit with the edge of the discharge port, and achieve magnetic attraction through magnetic adsorption components (such as iron strips) set on the edge of the discharge port, thereby ensuring a reliable seal on three sides except for the shaft side. Second, at the part where the shaft passes through the buffer cavity, an elastic sealing ring is preferably set to reduce the leakage channel caused by the structural gaps caused by the rotation of the shaft. In addition, in terms of structural design, this device uses reasonable arrangement of limit blocks to make the guide slope formed by the opening of the flap door avoid the side where the shaft is located, effectively guiding the tobacco and airflow to be discharged in the non-rotation direction, avoiding the direct impact of high-pressure airflow on the shaft gap, thereby further weakening the impact of leakage at this point.

[0026] It should be noted that when the flap door is closed, its free end disengages from the limiting block, and the discharge port is tightly sealed by the flap door. At this time, the system switches back to the conventional pneumatic feeding mode, and the tobacco is guided into the guide pipe from the bottom of the buffer chamber under negative pressure. Because the discharge port is sealed on three sides, and the magnetic structure further compensates for mechanical closure deviations, a stable airtight closure state can be formed, thereby effectively maintaining the negative pressure inside the system, preventing leakage or disturbance of the conveying airflow, and ensuring the continuity and stability of the tobacco conveying process.

[0027] To further optimize the sealing effect, this invention also preferably positions the hinge of the flap door as close as possible to the side wall of the buffer cavity near the discharge port. This design effectively shortens the possible leakage path of the airflow, reducing the chance of the airflow flowing around the side wall of the hinge to the discharge port. It also helps to concentrate the sealing area of ​​the flap door in the closed state on three sides of the discharge port edge, thus creating a more stable airtight closure structure. Furthermore, the proximity of the hinge to the discharge port improves the control accuracy of the flap door's opening and closing angle. Combined with the structural support function of the limiting block, this further enhances the consistency of the angle when opening and guiding the flow, and the sealing fit when closing. Simultaneously, this arrangement also allows for a smooth transition between the guide slope and the tobacco discharge pipe, guiding the tobacco to naturally slide into the discharge path during the discharge process, avoiding tobacco accumulation or poor discharge due to structural misalignment or discontinuous guide slope.

[0028] The advantages of this utility model over the prior art are as follows:

[0029] This utility model achieves effective opening and closing control of the venting pipe by opening a discharge port on the top side wall of the buffer cavity of the original wind-powered wire feeder and setting a flip-up flap door and its driving mechanism. The structure is reasonable and easy to install, which facilitates the transformation and upgrading of existing equipment without the need for large-scale modifications to the buffer cavity.

[0030] The device employs a sealing assembly consisting of a hollow silicone strip covering the outer periphery of the flap door and an embedded magnetic strip. This assembly, along with a motor-controlled flap door, tightly presses against the edge of the discharge port. A limiting block ensures precise positioning of the flap door when closed. Simultaneously, the edge of the discharge port is equipped with a magnetic adsorption component (such as an iron strip) corresponding to the magnetic strip of the flap door. This magnetic adsorption structure effectively compensates for closing errors caused by mechanical clearances in the drive mechanism, ensuring a tight seal between the flap door and the discharge port when closed. This forms a stable, airtight seal, effectively preventing airflow leakage, maintaining the stability of the internal negative pressure of the system, and ensuring the continuity and stability of tobacco delivery.

[0031] At the same time, the opening of the flap door forms a guiding slope, optimizing the tobacco discharge path and solving the problems of tobacco retention and incomplete emptying caused by the original method of relying solely on a fixed conveying path for emptying, thus improving emptying efficiency and equipment operation stability.

[0032] In addition, the drain pipe adopts a design that combines a closed tubular structure at the front with an open inclined slope at the rear, which facilitates manual observation of the internal condition of the drain pipe and cleaning and maintenance, effectively alleviating the problems of difficult observation and cleaning of traditional fully enclosed structures.

[0033] This utility model has a compact overall structure and reliable operation. It can effectively solve the technical problems of incomplete evacuation and difficulty in cleaning up the filament in the prior art, improve the operating efficiency of the pneumatic filament feeder and the stability of the production line, and has good practical and promotional value. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a side view of a rapid air venting device for a pneumatic wire feeder according to the present invention;

[0036] Figure 2 This is a right view of the buffer cavity of this utility model;

[0037] Figure 3 for Figure 2 Schematic diagram of AA section;

[0038] Reference numerals: 1. Buffer cavity; 11. Airflow conveying pipe; 12. Discharge port; 13. Limiting block; 14. Metal part; 2. Tobacco shred exhaust pipe; 3. Flip door; 31. Rotating shaft; 32. Free end; 33. Magnetic strip; Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0040] This utility model provides a rapid venting device for a pneumatic tobacco feeding machine, suitable for upgrading the functionality of existing pneumatic tobacco feeding equipment. It features a compact structure, is easy to install and add, and requires no large-scale modification of the main unit structure, exhibiting strong engineering adaptability and promotional value. The device mainly includes a buffer chamber 1, a discharge port 12, a flap door 3, a tobacco venting pipe 2, a rotating shaft 31, a drive motor, a limit block 13, as well as air path control components and an electrical control unit.

[0041] The buffer chamber 1 serves as an intermediate storage unit in the pneumatic tobacco feeder. Its top is connected to the upstream feeding system via a feeding belt, and it is also connected to the downstream pneumatic conveying system via the tobacco conveying channel 11, forming a stable negative pressure suction and conveying circuit. This invention features a discharge port 12 on the top side wall of the buffer chamber 1. The discharge port is preferably located away from the original feeding channel and airflow inlet area to ensure that the normal tobacco feeding process is not disturbed, and it can also serve as an auxiliary discharge path during emptying.

[0042] A tobacco venting pipe 2 is sealed to the outside of the discharge port 12. This pipe is arranged horizontally downwards and includes a closed tubular structure at the front and an open guide structure at the rear. The angle between the pipe and the horizontal plane is preferably 60±3° to ensure that the tobacco can be discharged smoothly under gravity. The front section is a cylindrical structure with open ends. The diameter of the opening near the discharge port is slightly larger than the discharge port diameter. It is fixed to the outer wall of the cavity using a wrap-around insertion method to achieve a sealed connection and prevent airflow leakage during positive pressure venting. The rear section extends continuously downwards from the end of the front section to form an inclined guide slope with an upward opening. Its open design not only facilitates the sliding discharge of tobacco but also allows operators to observe the venting status and clean the residue inside the pipe, reducing the risk of dust accumulation and tobacco snagging, and improving the stability of equipment operation.

[0043] The flap door 3 is a rotatable structural component located at the discharge port 12. It is hinged to the side wall of the buffer cavity 1 via a rotating shaft 31 and its rotation and opening / closing are controlled by a drive motor. The rotating shaft 31 passes through the side wall of the buffer cavity 1 and extends to the outside of the cavity. Its end is connected to the motor via a coupling. The motor is mounted on the outer wall of the cavity and can stably drive the flap door 3 to achieve the opening and closing action. The flap door 3 has a sheet-like structure, and a sealing component is provided on the outer peripheral edge, including a hollow silicone strip covering the edge and a magnetic strip embedded inside. The corresponding edge of the discharge port 12 is provided with a magnetic adsorption component, such as a metal strip or iron piece, which forms an adsorption engagement with the magnetic strip. When the flap door is closed, this magnetic structure can automatically compensate for the transmission gap of the motor and rotating shaft, achieving efficient airtight closure, preventing airflow leakage from the system, and maintaining the stability of the negative pressure inside the cavity.

[0044] To ensure the flow guidance effect after the flap door is opened, a limit block 13 is set on the inner wall of the cavity relative to the discharge port. After the flap door is opened and rotated to a certain angle, its inner free end abuts against the surface of the limit block, forming an inclined flow guiding slope, which facilitates the residual tobacco to slide into the discharge pipe, thereby improving the discharge efficiency and reducing the phenomenon of tobacco hanging.

[0045] This device also includes an airflow control system to coordinate the air pressure switching during the evacuation process. This system includes a positive pressure branch pipe, a negative pressure branch pipe, a solenoid three-way valve, and an airflow delivery pipe connecting to the lower part of the buffer chamber. One end of the solenoid three-way valve is connected to both the positive and negative pressure air sources, and the other end is connected to the airflow delivery pipe. The controller dynamically controls the solenoid three-way valve to alternate between the positive and negative pressure paths according to the specific evacuation and cleaning conditions. During the evacuation process, the controller periodically switches the solenoid valve according to a preset program, effectively removing residual tobacco through the alternating disturbance of positive and negative pressure airflow. When the evacuation is complete, the controller closes the flap door and switches the solenoid three-way valve back to the negative pressure path, restoring the equipment to normal suction and delivery, ensuring continuous and stable tobacco delivery.

[0046] This device features a rational structural design and high functional integration. While ensuring sealing, venting efficiency, and operational safety, it also fully considers compatibility with existing systems and suitability for retrofitting. The overall installation is simple and the control is flexible, making it particularly suitable for upgrading existing pneumatic yarn feeders, helping to improve the cleanliness and operational stability of the yarn feeding system.

[0047] The rapid purging process of this device is uniformly scheduled by the controller and executed in stages according to a preset program. The specific steps are as follows:

[0048] Step (1): After the controller starts the evacuation program, it first controls the shut-off of the feeding mechanism upstream of the buffer chamber, cutting off the input path of the tobacco material and preventing new tobacco from entering the buffer chamber. At the same time, the feeding belt continues to operate to transport the tobacco residue on the belt, allowing it to enter the buffer chamber and be discharged through the discharge port. During this stage, the flap gate is already open, and its free end abuts against the limit block to form an inclined guide slope, providing a smooth discharge channel for the tobacco and avoiding blockage or backflow during the discharge process.

[0049] Step (2): After the tobacco shreds on the feeding belt have been completely conveyed and basically emptied, the feeding belt stops running. The controller controls the electromagnetic three-way valve to start the periodic alternation process of positive and negative pressure airflow according to the set program. Initially, short-term positive and negative pressure alternation (including continuous airflow or pulsed airflow) is used to effectively remove the hanging and residual tobacco shreds attached to the inner wall of the emptying pipe and the buffer cavity through airflow disturbance. Then, a long-term airflow switching stage is entered. The loose tobacco shreds are blown out from the discharge port or the original airflow channel by positive pressure, and the residual tobacco shreds are sucked away by negative pressure suction, thereby achieving a comprehensive cleaning of the buffer cavity and the emptying channel.

[0050] Step (3): After completing all evacuation and cleaning procedures, the controller controls the flap door to close. The magnetic sealing assembly ensures a reliable adsorption seal between the edge of the flap door and the edge of the discharge port, effectively eliminating motor drive clearance and maintaining airtightness at the discharge port. Subsequently, the controller switches the electromagnetic three-way valve to the negative pressure air source passage, restoring the entire system to negative pressure suction and conveying state. Finally, the feeding belt is restarted, and the wire feeding system resumes normal operation.

[0051] Working principle:

[0052] The rapid evacuation device for a pneumatic tobacco feeder provided by this utility model introduces a flap door structure, an evacuation channel, and a switchable airflow control system on the basis of the original system. With the programmed scheduling of the electronic control unit, it can achieve efficient evacuation and cleaning of residual tobacco in the buffer cavity, effectively improving the cleanliness and operational stability of the tobacco feeding system.

[0053] Under normal operating conditions, the buffer chamber, serving as an intermediate storage unit in the pneumatic tobacco feeding system, receives tobacco shreds from upstream via negative pressure airflow and outputs them stably to the downstream system through the tobacco conveying channel at the bottom of the chamber. In this state, the flap door at the discharge port is closed, and its magnetic sealing components are tightly fitted to the chamber structure, ensuring isolation between the discharge port and the external environment, thereby maintaining good airtightness and a negative pressure conveying environment within the chamber.

[0054] When the purging and cleaning procedure needs to be performed, the controller activates the purging mode. First, it closes the upstream feeding path to prevent new tobacco from entering the cavity. At the same time, the feeding belt continues to run, transporting the remaining tobacco on the belt into the cavity and discharging it through the opened discharge port. At this point, the flap door opens to a preset angle, and the free end of the door abuts against the limit block to form an inclined guide ramp, guiding the tobacco smoothly into the purging pipe, achieving the initial discharge process relying on gravity.

[0055] After the tobacco is discharged by gravity, the controller activates the airflow control system, which alternately switches the airflow direction between positive and negative pressure sources via a solenoid three-way valve, performing multiple rounds of periodic airflow disturbance cleaning. The airflow can use short-duration, high-frequency switching to disperse any tobacco adhering to the inner walls of the cavity or pipe, followed by a long-duration, stable airflow to completely remove loose, residual tobacco from the venting channel or the original conveying path. During this process, the flap door remains open or operates intermittently according to the programmed sequence to adapt to different cleaning intensities.

[0056] By alternating positive and negative pressure airflows, a violently and rapidly changing airflow field is formed inside the cavity, subjecting the system to repeated shearing forces, peeling forces, and pulsating pressure differences. This unsteady airflow vibrates and impacts the tobacco shreds adhering to the inner wall of the cavity and at pipe joints, causing them to become locally unstable and loosened, and ultimately "torn off" and carried away by the disturbed airflow, thus achieving non-contact and highly efficient cleaning. This cleaning method is particularly suitable for common tobacco shredding areas such as pipe corners and structural joints, with significant removal effects.

[0057] After the evacuation and cleaning are completed, the controller automatically closes the flap gate, and the magnetic sealing structure ensures that the discharge port is restored to a highly airtight state; the electromagnetic three-way valve returns to the negative pressure path, and normal suction and delivery airflow is re-established. Subsequently, the feed belt restarts, and the system returns to standard operating mode.

[0058] This device achieves automated and rapid evacuation while effectively solving the pain points of traditional wind-powered wire feeding systems, such as difficulty in cleaning wire entanglement, easy pipe blockage, and frequent maintenance. It has good engineering adaptability and value for modification and promotion.

[0059] Of course, the above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, alterations, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A rapid venting device for a pneumatic wire feeder, comprising a buffer chamber (1), an airflow conveying pipe connected to the top of the buffer chamber (1), a conveyor belt connected to the top of the buffer chamber (1), and an airflow source connected to the airflow conveying pipe, characterized in that, The buffer cavity (1) has a discharge port (12) on the top side, and a tobacco shred discharge pipe (2) is connected to the outside of the discharge port; A flip-up door (3) is hinged at the discharge port (12), and the flip-up door (3) is hinged and installed through a pivot (31) that passes through the side wall of the buffer cavity (1). The rotating shaft (31) is connected to a drive motor located on the outside of the cavity. The drive motor is used to drive the flap door (3) to open or close. When the flap door (3) is opened, its free end (32) abuts against the limiting block (13) on the inner wall of the buffer cavity, forming a guide slope from the buffer cavity to the drain pipe (2). When the flap door (3) is closed, its outer edge presses against the outer edge of the discharge port (12) to achieve airtight sealing.

2. The rapid evacuation device for a pneumatic wire feeder according to claim 1, characterized in that, The outer periphery of the flip door (3) is provided with a sealing component, which includes the flip door body located in the middle layer, a hollow silicone strip covering the edge of the flip door body, and a magnetic strip embedded inside the hollow silicone strip.

3. A rapid venting device for a pneumatic wire feeder according to claim 1, characterized in that, The limiting block (13) is disposed along the inner wall of the buffer cavity (1) and is a support structure disposed relative to the discharge port (12); The limiting block (13) is used to limit the rotation angle of the flap door when it is opened, and to provide a stable guide slope.

4. The rapid venting device for a pneumatic wire feeder according to claim 1, characterized in that, The guide ramp is inclined at 60±3° relative to the horizontal plane.

5. The rapid venting device for a pneumatic wire feeder according to claim 1, characterized in that, The tobacco shred discharge pipe (2) is a tubular component with openings at both ends. The opening size of the end connected to the discharge port (12) is larger than the size of the discharge port, so as to achieve a wrap-around connection and sealing fit of the discharge port.

6. The apparatus according to claim 1, characterized in that, The rotating shaft (31) extends through one end of the side wall of the buffer cavity (1) and is connected to the drive end of the drive motor through a coupling. The drive motor is located outside the buffer cavity (1). The rotating shaft is supported by bearings to ensure the stability of the rotating shaft and realize the automatic opening and closing of the flip door.

7. The rapid venting device for a pneumatic wire feeder according to claim 1, characterized in that, The tobacco venting pipe (2) is a tubular structure with open ends at the front and an inclined open slope structure extending from the tubular structure at the rear.

8. A rapid venting device for a pneumatic wire feeder according to claim 1, characterized in that, The device also includes an airflow source, a positive pressure branch pipe, a negative pressure branch pipe, an airflow delivery pipeline, and an electromagnetic three-way valve installed between the positive pressure branch pipe, the negative pressure branch pipe, and the airflow delivery pipeline. The device also includes a controller, which is electrically connected to the drive motor and the electromagnetic three-way valve (93); The controller (8) is configured to: control the electromagnetic three-way valve to connect the positive pressure branch pipe and the airflow delivery pipe when the flap door (3) is open, and output positive pressure airflow; and control the electromagnetic three-way valve to connect the negative pressure branch pipe and the airflow delivery pipe after the flap door (3) is closed, and output negative pressure airflow.

9. A rapid venting device for a pneumatic wire feeder according to claim 2, characterized in that, The discharge port (12) is provided with a magnetic adsorption element corresponding to the magnetic strip (33) embedded in the outer periphery of the flap door (3). The magnetic adsorption element is an iron strip or other metal part (14) that can be adsorbed with the magnetic strip.

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