Wind speed balancing device for wind wire feeding system coiling unit

Abstract

The wind speed balancing device of the rolling and connecting unit of the wind-powered wire feeding system belongs to the field of cigarette making technology. It includes a dust removal pipe wind speed detection unit and a wind speed adjustment control unit, a tobacco pipe wind speed detection unit and a PLC control system. The dust removal pipe wind speed detection unit and the wind speed adjustment control unit are arranged in the dust removal pipeline between the wind power unit and the cigarette machine wire collection box, and the tobacco pipe wind speed detection unit is arranged in the tobacco pipe between the wire feeding machine and the cigarette machine wire collection box. The dust removal pipe wind speed detection unit and the wind speed adjustment control unit, and the tobacco pipe wind speed detection unit transmit the collected data to the PLC control system, and the PLC control system adjusts the parameters of the dust removal pipe wind speed detection unit and the wind speed adjustment control unit, and the tobacco pipe wind speed detection unit. The stability of the wire feeding wind speed of the rolling and connecting unit is achieved, and the possibility of tobacco pipe blockage is eliminated under the premise of reasonably reducing the wire feeding wind speed. Therefore, the unit wind speed balancing device can keep the wire feeding wind speed of the cigarette unit stable and tobacco is supplied normally.

Description

Technical Field

[0001] The invention relates to a wind speed balancing device for a wind-driven wire feeding system rolling and splicing unit, belonging to the technical field of cigarette making. Background Art

[0002] The wind-driven wire feeding system is a complete system that uses negative pressure air suction to distribute finished tobacco from the wire storage cabinet to each cigarette making machine. It is mainly composed of a wire feeder, a tobacco delivery pipeline, a wind-driven wire feeding dust removal pipeline, a dust collector, a fan, a wind-driven wire feeding system control station and other equipment. The wind-driven wire feeding system can achieve the process goals of loosening, impurity removal, dehydration, cooling, and dust removal during the tobacco delivery process. At the same time, due to the use of an air suction device, the tobacco runs in a closed pipeline, and tobacco dust will not be emitted to the workshop, destroying the labor production environment of the workshop.

[0003] However, if the entire wind-driven wire feeding system is improperly designed and used, such as when the conveying wind speed is high, some materials, especially fibrous and leaf-shaped materials, may be broken. The performance of the wind-driven wire feeding system is directly related to the process performance of the tobacco after conveying, that is, the breaking rate of the tobacco after wind-driven conveying, the moisture loss of the tobacco, the temperature and the looseness, among which the breaking rate is the most important. When the diameter and length of the tobacco conveying pipeline and the moisture content of the tobacco are constant, the breaking rate of the tobacco after wind-driven conveying (that is, the breaking rate of the tobacco by the system) is mainly determined by the conveying air speed.

[0004] At present, in the production process, the pipeline of each rolling unit is connected to the main air conveying and dust removal pipe in parallel. However, the tobacco demand of the rolling unit is intermittent during production, and the wind wire feeding system randomly delivers tobacco to each rolling unit during the production process. As a result, the wind speed of different rolling units varies during the wind wire feeding process, and the wind speed of some units is too high due to the unstable wind speed, which leads to increased tobacco breakage, directly affecting the amount of tobacco dropped at the end of the cigarette and quality indicators such as hard and soft points, increasing the number of defective products such as empty ends, and increasing production costs. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and to provide a wind speed balancing device for a rolling unit of a wind-powered wire feeding system, which can realize flexible tobacco transportation by controlling and stabilizing the wire suction wind speed of each rolling unit or by controlling the tobacco feeding speed and the wire suction wind speed, thereby reducing the tobacco breakage rate and improving the cigarette output and quality.

[0006] The technical solution of the present invention is as follows:

[0007] The wind speed balancing device of the tobacco pipe rolling unit of the wind-powered wire feeding system is characterized in that it comprises a dust removal pipe wind speed detection unit and a wind speed adjustment control unit, a tobacco pipe wind speed detection unit and a PLC control system, wherein the dust removal pipe wind speed detection unit and the wind speed adjustment control unit are arranged in the dust removal pipeline between the wind power unit (composed of a fan, a dust collector and other equipment) and the tobacco pipe collecting box of the cigarette making machine, and the tobacco pipe wind speed detection unit is arranged in the tobacco pipe between the wire feeding machine and the tobacco pipe collecting box of the cigarette making machine, and the dust removal pipe wind speed detection unit and the wind speed adjustment control unit and the tobacco pipe wind speed detection unit transmit the collected data to the PLC control system, and the PLC control system adjusts the parameters of the dust removal pipe wind speed detection unit and the wind speed adjustment control unit and the tobacco pipe wind speed detection unit.

[0008] Furthermore, the tobacco pipe wind speed detection unit includes a venturi tube flowmeter arranged in the tobacco pipe between the tobacco feeder and the tobacco collecting box of the cigarette making machine.

[0009] Furthermore, the Venturi tube flowmeter includes a Venturi tube, three pressure ports, a differential pressure transmitter, and a pressure transmitter. The three pressure ports are arranged along the length of the Venturi tube. The differential pressure transmitter cooperates with the two pressure ports near the inlet end of the Venturi tube to detect the wind speed in the Venturi tube, and the pressure transmitter cooperates with the pressure port near the outlet end of the Venturi tube to detect the pressure in the Venturi tube.

[0010] Furthermore, both ends of the venturi tube flowmeter are connected to the tobacco pipeline through transparent observation tubes.

[0011] Furthermore, the Venturi tube is composed of an inlet expansion section, an inlet equal diameter section, an intermediate contraction section, a secondary expansion section, an outlet equal diameter section, and an outlet contraction section connected in sequence; the minimum tube diameter of the inlet expansion section is equal to the diameter of the tobacco pipeline, the minimum tube diameter of the intermediate contraction section is equal to the diameter of the tobacco pipeline, and the minimum tube diameter of the outlet contraction section is equal to the diameter of the tobacco pipeline. The multi-section variable diameter structure can eliminate the risk of throat section blockage caused by a single reduced diameter in the Venturi tube flowmeter.

[0012] Further, the dust removal pipe wind speed detection unit and wind speed adjustment control unit include a wind speed detection unit and a wind speed adjustment control unit;

[0013] The wind speed detection unit is arranged on one side close to the cigarette machine's wire collection box, and includes a dust removal pipe, an upstream pressure port, a downstream pressure port, a throttle orifice plate, and a differential pressure transmitter. The throttle orifice plate is installed in the dust removal pipe, and the upstream pressure port and the downstream pressure port are respectively arranged in the dust removal pipe on both sides of the throttle orifice plate. The differential pressure transmitter cooperates with the upstream pressure port and the downstream pressure port to detect the wind speed in the dust removal pipe section;

[0014] The wind speed adjustment control unit is arranged on the side close to the wind power unit, and includes a converging pants pipe, a pneumatic switching butterfly valve, and a regulating butterfly valve. The two pipe openings of the converging pants pipe are connected to the dust removal pipe through the diverting pants pipe respectively, and the pneumatic switching butterfly valve and the regulating butterfly valve are respectively arranged on the two diverting pants pipes.

[0015] Furthermore, the diameter of the diverter pipe where the regulating butterfly valve is located is greater than or equal to the diameter of the dust removal pipe. The diameter of the diverter pipe where the pneumatic switch butterfly valve is located is less than or equal to the diameter of the diverter pipe where the regulating butterfly valve is located.

[0016] Furthermore, an air supply bypass is externally connected between the dust removal pipe wind speed detection unit and the wind speed adjustment control unit and the wind power unit.

[0017] Furthermore, the outside of the venturi tube flowmeter is integrated with a sealing cover for protection, and the dust removal pipe wind speed detection unit and wind speed adjustment control unit are integrated with a sealing cover for protection.

[0018] Furthermore, the device is also connected to a human-machine interface, and the regulating butterfly valve, the pneumatic switch butterfly valve, the differential pressure transmitter at the dust removal pipe, the differential pressure transmitter at the tobacco pipeline and the pressure transmitter respectively transmit data in real time to the PLC control system, and the PLC control system uploads the data to the human-machine interface for real-time monitoring and display;

[0019] For the dust removal pipe wind speed detection unit and the wind speed adjustment control unit, the PLC control system adaptively adjusts the regulating butterfly valve according to the data collected by the differential pressure transmitter;

[0020] For the tobacco pipe wind speed detection unit, the PLC control system adaptively adjusts the real-time wind speed of tobacco suction and the regulating butterfly valve according to the data collected by the differential pressure transmitter; for the data collected by the pressure transmitter, if it exceeds its alarm value, there is a risk of blockage in the tobacco pipeline, and the pneumatic switch butterfly valve is opened through the PLC control system to increase the instantaneous wind speed of tobacco suction in the tobacco pipeline.

[0021] By setting a corresponding wind speed balancing device for the rolling and splicing unit of the wind-powered wire feeding system in each group of cigarette machine wire collection boxes, the wire feeding wind speed of the rolling and splicing unit is stabilized. The wind speed is adjusted according to the real-time wind speed checked. If it is detected that the negative pressure fluctuation of the tobacco pipe is greater than its alarm value, the pneumatic switch butterfly valve is opened to increase the instantaneous wire suction wind speed to prevent the possibility of blockage in the tobacco pipe. Therefore, the use of the unit wind speed balancing device can keep the wire feeding wind speed of the cigarette unit stable and the tobacco is normally supplied under the premise of reasonably reducing the wire feeding wind speed. The present invention can stabilize the tobacco conveying speed of a single rolling and splicing unit, control the tobacco crushing and water loss after conveying, effectively improve the quality of cigarettes, and provide a powerful guarantee measure for the development of tobacco technology in the cigarette industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the device of the present invention;

[0023] Figure 2 It is a schematic diagram of the wind speed detection unit and the wind speed adjustment control unit of the dust removal pipe of the present invention;

[0024] Figure 3 Schematic diagram of a tobacco pipe wind speed detection unit of the present invention;

[0025] In the figure: 1 dust removal pipe wind speed detection unit and wind speed adjustment control unit, 2 cigarette machine collection box, 3 tobacco pipe wind speed detection unit, 4 human-machine interface, 5 converging pants pipe, 6 pneumatic switch butterfly valve, 7 diverting pants pipe, 8 regulating butterfly valve, 9 PLC control system, 10 sealing cover, 11 upstream pressure port, 12 dust removal pipeline, 13 upstream pressure pipe, 14 hose, 15 differential pressure transmitter, 16 throttling orifice, 17 hose, 18 downstream pressure port, 19 tobacco pipeline connected to tobacco feeder, 20 transparent observation tube, 21 venturi tube flowmeter, 22 differential pressure transmitter, 23 pressure port, 24 sealing cover, 25 pressure transmitter, 26 transparent observation tube, 27 tobacco pipeline entering tobacco collecting box of cigarette making machine, 28 hose, 29 hose, 30 air supply bypass, 31 venturi tube inlet expansion section, 32 venturi tube inlet equal diameter section, 33 venturi tube intermediate contraction section, 34 venturi tube secondary expansion section, 35 venturi tube outlet equal diameter section, 36 venturi tube outlet contraction section. DETAILED DESCRIPTION

[0026] like Figure 1 As shown, the wind speed balancing device of the rolling unit of the wind-powered wire feeding system includes a dust removal pipe wind speed detection unit and a wind speed adjustment control unit 1, a tobacco pipe wind speed detection unit 3, a human-machine interface 4 and a PLC control system 9; the dust removal pipe wind speed detection unit and the wind speed adjustment control unit are arranged in the dust removal pipeline between the wind power unit and the cigarette machine wire collection box, and the tobacco pipe wind speed detection unit is arranged in the tobacco pipeline between the wire feeding machine and the cigarette machine wire collection box. An air supply bypass 30 is externally connected between the dust removal pipe wind speed detection unit and the wind speed adjustment control unit and the wind power unit. Since the cigarette machine's wire collection box adopts intermittent wire suction, a pneumatic switch butterfly valve and a matching silencer are arranged on the dust removal branch pipe to form an air supply bypass that is interlocked with the cigarette machine's wire collection box wire suction switch valve. When the cigarette machine's wire collection box is sucking wire, the air supply bypass is closed, and when the cigarette machine's wire collection box is not sucking wire, the air supply bypass is opened, simulating the compensation of the wire suction air volume to ensure that the air volume allocated to each cigarette machine in the system is constant, creating conditions for the wind speed balancing device of the wind power wire feeding system's rolling unit.

[0027] The dust removal pipe wind speed detection unit is composed of an upstream pressure port 11, an upstream pressure pipe 13, a hose 14, a differential pressure transmitter 15, a throttling orifice plate 16, a hose 17, and a downstream pressure port 18 to form a split orifice flowmeter to detect the dust removal pipe wind speed Vc.

[0028] The wind speed control unit is composed of a converging trousers pipe 5, a pneumatic switch butterfly valve 6, a diverting trousers pipe 7, and a regulating butterfly valve 8. The pneumatic switch butterfly valve is equipped with a position detection switch to detect the valve switch state. The regulating butterfly valve can be a pneumatic regulating butterfly valve controlled by an electric positioner and a cylinder, an electric regulating butterfly valve controlled by an integrated servo electric actuator, or an electric regulating butterfly valve driven by a servo motor and a synchronous belt. The regulating butterfly valve uses a 4-20mA analog signal or a servo pulse electric signal to control and feedback the valve opening.

[0029] The PLC control system is integrated in the sealing cover 10 of the dust removal pipe wind speed detection unit and the wind speed adjustment control unit 1.

[0030] The tobacco pipe wind speed detection unit adopts a sealing cover 24 for integrated protection. A transparent observation tube 20 can be installed at the inlet end of the tobacco pipe wind speed detection unit, and a transparent observation tube 26 can be installed at the outlet end to observe the real-time running status of the tobacco. The venturi tube flowmeter 21 (which can also be a wedge-shaped flowmeter) includes a differential pressure transmitter 22, three pressure ports 23, a pressure transmitter 25, a hose 28, and a hose 29. The two ends of the venturi tube flowmeter are respectively connected to the tobacco pipe 19 connected to the feeder and the tobacco pipe 27 entering the cigarette machine collection box to detect the tobacco pipe wind speed Vs. In order to prevent the tobacco blockage phenomenon that may be caused by the reduction of the cross-sectional area of ​​the pipe by the Venturi tube flowmeter (wedge-shaped flowmeter), the pipe section of the tobacco tube wind speed detection unit is designed to enlarge the inlet and outlet diameters and then reduce them to the conventional diameter, that is, the Venturi tube is composed of an inlet expansion section 31, an inlet equal diameter section 32, an intermediate contraction section 33, a secondary expansion section 34, an outlet equal diameter section 35, and an outlet contraction section 36 connected in sequence.

[0031] The material-gas ratio in the pneumatic conveying of tobacco is the mass concentration, which refers to the ratio of the mass of tobacco that passes through the effective cross-section of the conveying pipe per unit time to the mass of gas. If μ is used to represent the material-gas mixing ratio (concentration) and G represents the mass (kg / h), then μ=G material / G gas. The diameter of the normal tobacco conveying pipeline generally ensures that the material-gas ratio of normal tobacco conveying (tobacco is not blocked and the wind unit energy consumed is small) is within the safety factor range of 0.8-1.2. The tobacco is suspended in the pipeline and will not cause tobacco blockage. The generally designed Venturi tube flowmeter includes three parts: "contraction section", "throat section" and "diffusion section". The throat is locally reduced by more than half of the cross-sectional area of ​​the conveying pipeline, resulting in an ultra-high material-gas ratio (mass concentration) that can easily cause throat tobacco blockage. After the improved Venturi tube flowmeter with a multi-stage variable diameter structure is adopted in the present invention, the material-gas ratio of tobacco in the throat section of the improved Venturi tube flowmeter is guaranteed to be within the safety factor range and will not cause tobacco blockage.

[0032] The device of the present invention has the following functions:

[0033] 1. Air leakage alarm of the wire collection box of the coiling machine

[0034] Under the premise of wind speed adjustment or opening adjustment, by detecting the dust removal pipe wind speed Vc and the tobacco pipe wind speed Vs, if the wind speed difference is greater than a set value, an air leakage alarm signal will be issued and the leakage rate at that time will be displayed in a pop-up window on the touch screen.

[0035] Air leakage rate = (Vc-Vs) / Vs *100%

[0036] Vs is the wind speed in the tobacco pipe, and Vc is the wind speed in the dust removal pipe.

[0037] 2. Tobacco tube blockage control

[0038] In the wire feeding state of wind speed control, when the pressure value of the tobacco pipe pressure transmitter is detected to be greater than the set value, the unit wind speed balance device will think that the tobacco pipe may have a material blocking fault. When a material blocking fault occurs, the pneumatic switch butterfly valve of the wind speed adjustment control unit performs a full-open and full-close action to increase the instantaneous wind speed of the tobacco pipe. The interval is two seconds. After three times, it returns to the wire feeding state control of wind speed control. If the pressure drops, it means that the wire blocking fault has been eliminated. If the pressure does not drop, repeat it again. If it still does not drop, a material blocking alarm signal will be issued.

[0039] 3. Wire shortage alarm

[0040] When the system is working, the wire collection boxes of each tobacco-rolling unit are intermittent. When the wire collection box is empty and the wire suction hopper is full, it stops sucking. If the duration of the empty wire signal is longer than the lack of material judgment time, the system considers that it is in the lack of material operation state at this time, and sends out a lack of material alarm signal to remind you to solve the tobacco supply problem.

[0041] 4. Adjust the tobacco delivery speed

[0042] The wind speed balance device of the wind-driven wire feeding system has functions such as the wind leakage alarm of the wire collection box of the wind-driven wire feeding system and the control of the blockage of the tobacco tube, which provide a guarantee for reducing the tobacco conveying speed to (9-13) ± 1m / s. At this speed, the tobacco is wrapped together and transported in a suspended state in the form of sand dunes, which reduces the friction between the tobacco and the tobacco tube, thereby greatly reducing the crushing of the tobacco by the wind-driven wire feeding system, reducing tobacco consumption, and improving the quality and economic benefits of cigarette products.

[0043] The wind speed balance device of the roto-rolling unit is a control device that integrates wind speed measurement, display, control and adjustment, tobacco box air leakage alarm, tobacco blockage alarm, and tobacco shortage alarm. The control system receives analog input, and the touch screen is installed on the panel of the roto-rolling unit operation table. The wind speed balance device consists of a dust removal pipe wind speed detection unit, a tobacco pipe wind speed detection unit, and a wind speed adjustment control unit. By adjusting the opening of the butterfly valve, the wind speed in the pipeline can be controlled.

[0044] After the tobacco collecting box of the rolling and splicing unit is full of tobacco, the wind speed regulation and control unit is in standby mode. When the unit wind speed balancing device receives a signal that tobacco is needed, the wind speed control system is started. When the rolling and splicing unit is in the process of sucking tobacco, as the tobacco suction hopper accumulates, the pipe resistance of this branch increases and the wind speed fluctuates accordingly. The control system compares the wind speed measured by the tobacco tube wind speed detection unit with the set value, controls the opening of the butterfly valve of the wind speed regulation and control unit, and realizes the function of automatic control of the wind speed of wind-powered wire feeding.

[0045] According to production needs, it can be switched to manual adjustment, i.e. opening adjustment mode. The opening adjustment can be achieved by pressing the start button on the touch screen menu and setting the butterfly valve opening. An opening of 0 represents full close, and an opening of 100% represents full open. Adjust the device to opening control on the touch screen, input the corresponding opening value from the touch screen, and the control system multiplies the opening value by the proportional coefficient to make the regulating butterfly valve turn to the corresponding opening, and display the corresponding opening value on the touch screen.

[0046] The control mode of this device:

[0047] 1. Opening control

[0048] Under the opening mode control, the wind speed control unit adjusts the butterfly valve and only accepts the angle setting from the touch screen (human-machine interface), opens the fixed angle, and the angle does not change during the production process. The values ​​of the dust removal pipe wind speed detection unit and the tobacco pipe wind speed detection unit are only displayed, and cannot participate in the control and automatically troubleshoot. The quality of the product cannot be well guaranteed during the production process in this mode. It is not advisable to maintain this mode for a long time.

[0049] 2. Wind speed control

[0050] Under wind speed mode control, the wind speed control unit adjusts the butterfly valve to continuously perform PID adjustment according to the wind speed value of the tobacco pipe wind speed detection unit, so that the wind speed value of the tobacco pipe wind speed detection unit is stabilized at an ideal set value. It ensures that the tobacco in the tobacco pipe moves at a uniform speed to avoid unstable wind speed and increase the crushing of tobacco.

[0051] 3. Automatic elimination of material blocking faults

[0052] During normal production, the wind speed value difference between the wind speed detection unit of the dust removal pipe and the wind speed detection unit of the tobacco pipe is not large and is within a normal range. When the difference between the two is too large due to air leakage in the cigarette machine's silk collection box, there are clumps of tobacco in the silk pipe, and the pressure sensor of the wind speed detection unit of the tobacco pipe is greater than the set value, which affects the uniform movement of the tobacco in the silk pipe and there is a risk of tobacco pipe blockage. At this time, the wind speed adjustment control unit suspends PID adjustment and maintains the current angle state. The pneumatic switch butterfly valve of the wind speed adjustment control unit changes the wind speed state in the silk pipe in the form of a pulse switch to break up the clumps of tobacco, so that the wind speed value difference between the wind speed detection unit of the dust removal pipe and the wind speed detection unit of the tobacco pipe is restored to a normal state, and the pressure sensor of the wind speed detection unit of the tobacco pipe is less than the set value. Troubleshooting. Close the pneumatic switch butterfly valve of the wind speed adjustment control unit, automatically restore the wind speed adjustment control unit to perform PID adjustment, and automatically produce. If the pressure of the pressure sensor of the wind speed detection unit of the tobacco pipe is greater than the set value and has not dropped, repeat the above operation again, and the blocking alarm signal is issued before it drops.

Claims

1. The wind speed balancing device of the wind-driven wire feeding system coiling unit is characterized by: It includes a dust removal pipe wind speed detection unit and a wind speed adjustment control unit, a tobacco pipe wind speed detection unit and a PLC control system. The dust removal pipe wind speed detection unit and the wind speed adjustment control unit are arranged in the dust removal pipeline between the wind power unit and the tobacco collection box of the cigarette making machine, and the tobacco pipe wind speed detection unit is arranged in the tobacco pipe between the tobacco feeder and the tobacco collection box of the cigarette making machine. The dust removal pipe wind speed detection unit and the wind speed adjustment control unit and the tobacco pipe wind speed detection unit transmit the collected data to the PLC control system, and the PLC control system adjusts the parameters of the dust removal pipe wind speed detection unit and the wind speed adjustment control unit and the tobacco pipe wind speed detection unit; the tobacco pipe wind speed detection unit includes a venturi tube flowmeter arranged in the tobacco pipe between the tobacco feeder and the tobacco collection box of the cigarette making machine; The venturi tube flowmeter comprises a venturi tube, three pressure ports, a differential pressure transmitter, and a pressure transmitter. The three pressure ports are arranged along the length direction of the venturi tube. The differential pressure transmitter cooperates with the two pressure ports near the inlet end of the venturi tube to detect the wind speed in the venturi tube. The pressure transmitter cooperates with the pressure port near the outlet end of the venturi tube to detect the pressure in the venturi tube. The dust removal pipe wind speed detection unit and wind speed adjustment control unit include a wind speed detection unit and a wind speed adjustment control unit; The wind speed detection unit is arranged on one side close to the cigarette machine's wire collection box, and includes a dust removal pipe, an upstream pressure port, a downstream pressure port, a throttle orifice plate, and a differential pressure transmitter. The throttle orifice plate is installed in the dust removal pipe, and the upstream pressure port and the downstream pressure port are respectively arranged in the dust removal pipe on both sides of the throttle orifice plate. The differential pressure transmitter cooperates with the upstream pressure port and the downstream pressure port to detect the wind speed in the dust removal pipe section; The wind speed adjustment control unit is arranged on the side close to the wind power unit, and includes a converging pants pipe, a pneumatic switching butterfly valve, and a regulating butterfly valve. The two pipe openings of the converging pants pipe are connected to the dust removal pipe through the diverting pants pipe respectively, and the pneumatic switching butterfly valve and the regulating butterfly valve are respectively arranged on the two diverting pants pipes.

2. The wind speed balancing device for the wind-driven wire feeding system winding unit according to claim 1 is characterized in that: Both ends of the venturi tube flowmeter are connected to the tobacco pipeline through transparent observation tubes.

3. The wind speed balancing device for the wind-driven wire feeding system winding unit according to claim 1 is characterized in that: The Venturi tube is composed of an inlet expansion section, an inlet equal diameter section, an intermediate contraction section, a secondary expansion section, an outlet equal diameter section, and an outlet contraction section connected in sequence; the minimum tube diameter of the inlet expansion section is equal to the diameter of the tobacco pipeline, the minimum tube diameter of the intermediate contraction section is equal to the diameter of the tobacco pipeline, and the minimum tube diameter of the outlet contraction section is equal to the diameter of the tobacco pipeline.

4. The wind speed balancing device for the wind-driven wire feeding system winding unit according to claim 1 is characterized in that: The diameter of the diversion pipe where the regulating butterfly valve is located is greater than or equal to the diameter of the dust removal pipe, and the diameter of the diversion pipe where the pneumatic switch butterfly valve is located is less than or equal to the diameter of the diversion pipe where the regulating butterfly valve is located.

5. The wind speed balancing device for the wind-driven wire feeding system winding unit according to claim 4 is characterized in that: An air supply bypass is externally connected between the dust removal pipe wind speed detection unit, the wind speed adjustment control unit and the wind power unit.

6. The wind speed balancing device for the wind-driven wire feeding system winding unit according to claim 4 is characterized in that: The outside of the venturi tube flowmeter is integratedly protected by a sealing cover, and the dust removal pipe wind speed detection unit and the wind speed adjustment control unit are integratedly protected by a sealing cover.

7. The wind speed balancing device for the wind-driven wire feeding system winding unit according to claim 5 is characterized in that: The device is also connected to a human-machine interface, and the regulating butterfly valve, pneumatic switch butterfly valve, differential pressure transmitter at the dust removal pipe, differential pressure transmitter at the tobacco pipeline and pressure transmitter respectively transmit data in real time to the PLC control system, and the PLC control system uploads the data to the human-machine interface for real-time monitoring and display; For the dust removal pipe wind speed detection unit and the wind speed adjustment control unit, the PLC control system adaptively adjusts the regulating butterfly valve according to the data collected by the differential pressure transmitter; For the tobacco pipe wind speed detection unit, the PLC control system adaptively adjusts the real-time wind speed of tobacco suction and the regulating butterfly valve according to the data collected by the differential pressure transmitter; for the data collected by the pressure transmitter, if it exceeds its alarm value, there is a risk of blockage in the tobacco pipeline, and the pneumatic switch butterfly valve is opened through the PLC control system to increase the instantaneous wind speed of tobacco suction in the tobacco pipeline.

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