A wind force wire feeding system

Abstract

The utility model discloses a kind of wind force wire feeding systems, it is related to cigarette manufacturing technical field.The wind force wire feeding system includes main return air pipe, multiple branch return air pipes, air supplement pipe and damping air supplement assembly.One end of main return air pipe is connected with fan;Multiple branch return air pipes are connected with main return air pipe by wind force balancer;Wind force balancer can balance and stabilize wind pressure in multiple branch return air pipes;The end of branch return air pipe, which is away from main return air pipe, is connected with wire feeding device;Branch return air pipe is equipped with air supplement port;Air supplement pipe one end is communicated with air supplement port, and the other end is connected with damping air supplement assembly;Damping air supplement assembly can reduce the speed of airflow entering branch return air pipe through air supplement port;Damping air supplement assembly includes: shell and the damping member arranged in the inside of shell;Damping member can block the flow of airflow.The wind force wire feeding system is used to avoid branch return air pipe pressure loss when unit starts and stops, improve the stability of system operation.

Description

Technical Field

[0001] This utility model relates to the field of cigarette manufacturing technology, and in particular to a pneumatic cigarette feeding system. Background Technology

[0002] In wind-powered tobacco feeding systems, a supplementary air device is usually added to compensate for pipeline pressure fluctuations caused by unit start-up and shutdown, thereby improving the quality and efficiency of tobacco delivery.

[0003] However, most of the supplementary air devices in existing pneumatic cigarette feeding systems cannot buffer the instantaneous pressure shock caused by the start and stop of the cigarette machine. This will increase the probability of fan surge, lead to increased resonance noise in the cigarette feeding duct, and may also cause instantaneous pressure loss in other branch and return air ducts.

[0004] Therefore, there is an urgent need for a wind-powered yarn feeding system to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a pneumatic wire feeding system to prevent pressure loss in the branch and return air ducts during unit start-up and shutdown, thereby improving the stability of system operation.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a wind-powered yarn feeding system, which includes: a main return air duct, one end of which is connected to a fan; multiple branch return air ducts, which are connected to the main return air duct via a wind balancer; the wind balancer can balance and stabilize the wind pressure in the multiple branch return air ducts; one end of each branch return air duct away from the main return air duct is connected to a yarn feeding device; each branch return air duct is provided with a makeup air inlet; a makeup air duct, one end of which is connected to the makeup air inlet, and the other end of which is connected to a damping makeup air assembly; the damping makeup air assembly can reduce the velocity of the airflow entering the branch return air duct through the makeup air inlet; the damping makeup air assembly includes: a housing and a damping element disposed inside the housing; the damping element can block the flow of the airflow.

[0008] In some embodiments, the damping member has a plurality of airflow holes along a first direction; the first direction is the flow direction of the airflow entering the branch and return air ducts through the air supply port; on the damping member, the portion outside the airflow holes is a blocking portion, which can block the flow of the airflow.

[0009] In some embodiments, the number of damping elements is multiple; the multiple damping elements are arranged at intervals along the first direction inside the housing.

[0010] In some embodiments, the air passages on two adjacent blocking members are staggered in the second direction and the third direction; the first direction, the second direction, and the third direction are arranged at an angle to each other.

[0011] In some embodiments, a sound-absorbing layer is provided on the inner wall of the housing; and / or, a sound-absorbing layer is provided on the inner wall of the air passage.

[0012] In some embodiments, the housing includes a first housing and a second housing; one end of the first housing is connected to the air supply pipe, and the other end is connected to the second housing; an air inlet is provided at the end of the second housing away from the first housing; in a third direction, the size of the first housing is smaller than the size of the second housing; the damping element is disposed on the second housing; the third direction is set at an angle to a first direction, the first direction being the flow direction of the airflow entering the branch return air pipe through the air supply inlet.

[0013] In some embodiments, the second housing includes a connecting portion and a damping portion arranged along the first direction; the damping portion is connected to the first housing through the connecting portion; the damping element is disposed on the damping portion; the connecting portion includes a first end and a second end, the first end being connected to the first housing and the second end being connected to the damping portion; in the third direction, the size of the first end is smaller than the size of the second end.

[0014] In some embodiments, a tobacco collecting device is further provided on the branch and return air ducts; the tobacco collecting device is disposed between the wind balancer and the tobacco feeding device, and is used to collect tobacco from the tobacco feeding device; the wind-powered tobacco feeding system further includes a tobacco speed measuring component and a first control valve; the tobacco speed measuring component is disposed between the tobacco collecting device and the tobacco feeding device, and the first control valve is disposed between the wind balancer and the tobacco collecting device; the tobacco speed measuring component is coupled to the first control valve; the tobacco speed measuring component can detect the speed of the tobacco between the tobacco feeding device and the tobacco collecting device; the first control valve can control its opening and closing degree according to the speed of the tobacco detected by the tobacco speed measuring component.

[0015] In some embodiments, the pneumatic yarn feeding system further includes an air leakage detection device disposed in the branch and return air ducts; the air leakage detection device is capable of detecting the air leakage rate of the branch and return air ducts.

[0016] In some embodiments, a tobacco collecting device is further provided on the branch and return air ducts; the tobacco collecting device is disposed between the wind balancer and the tobacco feeding device, and is used to collect tobacco from the tobacco feeding device; the air leakage detection device includes a first wind speed detection component and a second wind speed detection component disposed on the branch and return air ducts; the first wind speed detection component is disposed between the wind balancer and the tobacco collecting device, and the second wind speed detection component is disposed between the tobacco collecting device and the tobacco feeding device; the first wind speed detection component can detect the speed of the airflow flowing through the tobacco collecting device and the wind balancer, and the second wind speed detection component can detect the speed of the airflow flowing through the tobacco feeding device and the tobacco collecting device.

[0017] The beneficial effects of this utility model are:

[0018] This utility model provides a wind-powered wire feeding system. It includes a main return air duct connected to a fan and multiple branch return air ducts connected to the main return air duct via a wind balancer. The wind balancer balances and stabilizes the air pressure within the branch return air ducts, thus stabilizing the overall system pressure. Additionally, a makeup air inlet is provided on each branch return air duct, with one end connected to the makeup air inlet and the other end connected to a damping makeup air assembly. This makeup air duct can supplement airflow into the branch return air ducts during unit start-up and shutdown to balance system pressure. The damping makeup air assembly includes a housing and a damping element disposed inside the housing. This damping element can block the airflow entering the branch return air ducts from the makeup air inlet. This ensures that when the unit starts or stops and replenishes airflow into the branch and return air ducts through the make-up air duct, the replenished airflow (i.e., the airflow that wants to enter the branch and return air ducts from the make-up air inlet) will flow through the damping make-up air assembly. Part of the airflow will be blocked by the damping element in the damping make-up air assembly, thus allowing the replenished airflow to enter the branch and return air ducts at a relatively slow speed. This prevents the replenished airflow from instantly entering the branch and return air ducts and causing the remaining branch and return air ducts to lose pressure instantly, thereby reducing the probability of fan surge and improving the stability of system operation. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a wind-powered wire feeding system provided in a specific embodiment of this utility model;

[0020] Figure 2 This is a structural diagram of a damping air supply component provided in a specific embodiment of this utility model;

[0021] Figure 3 This is a structural diagram of a first damping element provided in a specific embodiment of this utility model;

[0022] Figure 4 This is a structural diagram of a second damping element provided in a specific embodiment of this utility model;

[0023] Figure 5 This is a structural diagram of a third damping component provided in a specific embodiment of this utility model.

[0024] In the picture:

[0025] 1. Main return air duct; 2. Branch return air duct; 21. Makeup air inlet; 3. Wind power balancer; 4. Tobacco feeding device; 5. Makeup air duct; 6. Damping makeup air assembly; 61. Housing; 611. First housing; 612. Second housing; 6121. Air inlet; 6122. Connecting part; 61221. First end; 61222. Second end; 6123. Damping part; 62. Damping element; 621. First damping element; 622. Second damping element; 623. Third damping element; 624. Airflow hole; 625. Blocking part; 7. Sound absorption layer; 8. Tobacco collecting device; 9. Tobacco speed measuring assembly; 10. First control valve; 101. Second control valve; 20. Leakage detection device; 201. First wind speed detection assembly; 202. Second wind speed detection assembly;

[0026] X1, first direction; X2, second direction; X3, third direction. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] like Figure 1 As shown, this embodiment provides a wind-powered yarn feeding system, which includes a main return air duct 1, multiple branch return air ducts 2, a makeup air duct 5, and a damping makeup air assembly 6.

[0032] One end of the aforementioned main return air duct 1 is connected to a fan. After the fan starts running, it extracts the air from inside the main return air duct 1, making the air pressure inside the main return air duct 1 lower than the external atmospheric pressure, thus creating a negative pressure. This negative pressure inside the main return air duct 1 enables the conveying of tobacco. The cross-sectional shape of the main return air duct 1 can be circular or rectangular; that is, the main return air duct 1 can be a round pipe or a square pipe. Those skilled in the art can flexibly choose and set it according to actual usage requirements.

[0033] The aforementioned multiple branch return air ducts 2 are connected to the main return air duct 1 via a wind balancer 3. The wind balancer 3 balances and stabilizes the air pressure within the multiple branch return air ducts 2. The wind balancer 3 is, for example, a bundle box with a tapered tubular structure. The small end of the bundle box is connected to the main return air duct 1, and the large end is connected to the multiple branch return air ducts 2. The end of each branch return air duct 2 facing away from the main return air duct 1 is connected to the tobacco feeding device 4. When the fan starts operating, a negative pressure is created in the main return air duct 1, which in turn creates a negative pressure within the multiple branch return air ducts 2 connected to the main return air duct 1. This negative pressure allows the tobacco from the tobacco feeding device 4 to be transported. Each branch return air duct 2 is equipped with a makeup air inlet 21.

[0034] One end of the aforementioned make-up air duct 5 is connected to the make-up air inlet 21 on the branch return air duct 2, and the other end of the make-up air duct 5 is connected to the damping make-up air assembly 6. This make-up air duct 5 is used to supplement airflow into the branch return air duct 2 during unit start-up and shutdown to balance system pressure. The damping make-up air assembly 6 can reduce the velocity of the airflow entering the branch return air duct 2 through the make-up air inlet 21. Specifically, as... Figure 2 As shown, the damping air supply assembly 6 includes a housing 61 and a damping element 62 disposed inside the housing 61. The damping element 62 can block the airflow entering the branch return air duct 2 from the air supply port 21.

[0035] Therefore, the wind-powered wire feeding system provided in this embodiment, by setting a main return air duct 1 connected to the fan, and setting multiple branch return air ducts 2 connected to the main return air duct 1 through a wind balancer 3, uses the wind balancer 3 to balance and stabilize the wind pressure in the multiple branch return air ducts 2, so that the pressure in the entire system is stable; in addition, a makeup air port 21 is opened on the branch return air duct 2, and a makeup air pipe 5 with one end connected to the makeup air port 21 and the other end connected to the damping makeup air assembly 6 is set. The makeup air pipe 5 can supplement the airflow into the branch return air duct 2 when the unit starts and stops, so as to balance the system pressure. The damping makeup air assembly 6 includes a housing 61 and a damping element 62 disposed inside the housing 61. The damping element 62 can block the airflow entering the branch return air duct 2 from the makeup air port 21. This ensures that when the unit starts or stops and replenishes airflow into the branch and return air ducts 2 through the replenishment air duct 5, the replenished airflow (i.e., the airflow that wants to enter the branch and return air ducts 2 from the replenishment air inlet 21) will flow through the damping replenishment air assembly 6. Part of the airflow will be blocked by the damping element 62 in the damping replenishment air assembly 6, thereby allowing the replenished airflow to enter the branch and return air ducts 2 at a relatively slow speed. This prevents the replenished airflow from instantly entering the branch and return air ducts 2 and causing the remaining branch and return air ducts 2 to lose pressure instantly, thereby reducing the probability of fan surge and improving the stability of system operation.

[0036] In some embodiments, combined with Figures 2 to 5 As shown, the damping element 62 has multiple airflow holes 621 along the first direction X1, where the first direction X1 is the flow direction of the airflow entering the branch and return air ducts 2 through the air intake 21. Specifically, these airflow holes 621 are arranged regularly to form a honeycomb structure, which can effectively reduce the flow velocity while ensuring airflow passage. It is easy to understand that the damping element 62 is adapted to the interior of the branch and return air ducts 2. That is, when the branch and return air ducts 2 have a circular tube structure, the damping element 62 has a circular plate structure, and the outer diameter of the damping element 62 is adapted to the inner diameter of the branch and return air ducts 2 to ensure the sealing and airflow guiding effect after installation.

[0037] On the damping member 62, the portion outside the airflow hole 621 is a blocking part 622, which blocks the airflow. In other words, airflow can only flow into the air supply port 21 and then into the branch and return air ducts 2 through the airflow hole 621 on the damping member 62. This arrangement, along with the blocking part 622 on the damping member 62, prevents the replenished airflow from instantly entering the branch and return air ducts 2. This design effectively slows down the airflow velocity, smooths system pressure changes, thereby reducing the risk of fan surge and improving system stability. Furthermore, the structure is simple, easy to manufacture and maintain, and possesses good practicality and economy.

[0038] In some embodiments, combined with Figures 2 to 5As shown, there are multiple damping elements 62, which are arranged at intervals inside the housing 61 along the first direction X1 (i.e., the airflow direction). Figure 2 Taking the shown perspective as an example, from left to right, the components are the first damping element 621, the second damping element 622, and the third damping element 623, forming a three-stage damping structure. This multi-stage damping design can effectively improve the control capability of the supplementary airflow.

[0039] Each damping element 62 adopts a circular plate-like structure design, which is adapted to the circular tube structure of the branch and return air ducts 2 to ensure smooth airflow. The outer diameter of the damping element 62 matches the inner diameter of the branch and return air ducts 2, ensuring good sealing and airflow guidance. Multiple airflow holes 621 are regularly arranged on the damping element 62. The diameter of these airflow holes 621 can be precisely set according to actual usage requirements, ensuring both the necessary airflow and appropriate resistance.

[0040] Through this multi-stage damping design, when the unit starts and stops, the supplementary airflow needs to pass through three damping elements 62 sequentially. Each damping element 62 exerts a certain damping effect on the airflow, creating a gradual deceleration effect. This progressive airflow control method can effectively prevent airflow from instantaneously entering the branch and return air ducts 2, thereby preventing sudden changes in system pressure. Especially at the moment of fan start-up or shutdown, this multi-stage damping design can significantly reduce the amplitude of system pressure fluctuations, effectively reducing the possibility of fan surge, thereby improving the operational stability of the entire wind-powered fiber feeding system.

[0041] Furthermore, the spaced arrangement of multiple damping elements 62 creates multiple buffer zones within the airflow channel, further optimizing the airflow pattern. This design not only improves system stability but also optimizes the uniformity of airflow distribution, providing a strong guarantee for the smooth operation of the entire pneumatic yarn feeding system.

[0042] In some embodiments, combined with Figures 2 to 5 As shown, in the second direction X2 and the third direction X3, the air passages 621 on two adjacent blocking members are staggered. In other words, with Figure 2Taking the shown perspective as an example, the three damping elements 62, from left to right, are the first damping element 621, the second damping element 622, and the third damping element 623. The orthographic projection of the airflow hole 621 on the first damping element 62 onto the second damping element 62 is located outside the airflow hole 621 on the second damping element 62 (i.e., on the blocking portion 622 of the second damping element 62). Similarly, the orthographic projection of the airflow hole 621 on the second damping element 62 onto the third damping element 62 is also located outside the airflow hole 621 on the third damping element 62 (i.e., on the blocking portion 622 of the third damping element 62). The first direction X1, the second direction X2, and the third direction X3 are arranged at an angle to each other, for example, 90°. By setting it up in this way, the supplementary airflow will be blocked by the blocking part 622 on the next damping element 62 after passing through the airflow hole 621 on one damping element 62. In this way, the blocking effect on the supplementary airflow is further improved through the cooperation of multiple damping elements 62, and the system operation is more stable during the start-up and shutdown of the unit.

[0043] In some embodiments, such as Figure 2 As shown, a sound-absorbing layer 7 is provided on the inner wall of the aforementioned housing 61, and / or, a sound-absorbing layer 7 is provided on the inner wall of the airflow hole 621 of the aforementioned damping member 62. This sound-absorbing layer 7 is, for example, sound-absorbing cotton or a composite material layer (e.g., glass wool + aluminum foil facing, or rock wool + polyester fiber covering). This arrangement reduces wind noise when the supplementary airflow passes through the damping air supply assembly 6, and also slows down the airflow to some extent (providing a sound-absorbing layer on the inner wall of the housing 61 increases the surface roughness of the inner wall of the housing 61).

[0044] In some embodiments, such as Figure 2As shown, a sound-absorbing layer 7 is provided on the inner wall of the aforementioned housing 61, and / or, a sound-absorbing layer 7 is provided on the inner wall of the air passage 621 of the aforementioned damping member 62. The sound-absorbing layer 7 can be made of various materials, such as: sound-absorbing cotton, which has good sound absorption performance and lightweight characteristics; or a composite material layer, such as a combination of glass wool and aluminum foil facing, which not only has excellent sound insulation effect but also certain fire resistance; or a combination of rock wool and polyester fiber covering, which not only has superior sound insulation performance but also good durability and environmental protection characteristics. This design achieves multiple noise reduction effects: First, the sound-absorbing layer 7 effectively absorbs high-frequency noise generated when airflow passes through the damping air supply component 6, reducing the impact of wind noise on the surrounding environment. Second, the surface of the sound-absorbing layer 7 has a certain degree of roughness; when airflow passes through it, the microstructures on its surface create turbulence, thus slowing down the airflow. Furthermore, applying the sound-absorbing layer 7 to the inner wall of the housing 61 increases the surface roughness of the inner wall, further optimizing the airflow and making the airflow smoother and more stable when passing through the damping air supply component 6. This design not only improves the system's operational stability but also effectively reduces wind noise during operation.

[0045] In some embodiments, such as Figure 2 As shown, the aforementioned housing 61 includes a first housing 611 and a second housing 612. One end of the first housing 611 is connected to the make-up air duct 5, and the other end is connected to the second housing 612. Furthermore, the second housing 612 has an air inlet 6121 at its right end, opposite to the first housing 611. At the moment of unit start-up and shutdown, outside air can flow through the air inlet 6121, through the damping make-up air assembly 6, and then into the branch return air duct 2 from the make-up air inlet 21. In the third direction X3, the size of the first housing 611 is smaller than the size of the second housing 612. The aforementioned damping assembly 62 is disposed on the second housing 612. Here, the third direction X3 is set at an angle to the first direction X1, where the first direction X1 is the flow direction of the airflow entering the branch return air duct 2 through the make-up air inlet 21. The above arrangement makes the size of the second housing 612 larger than that of the first housing 611. This allows the size of the damping member 62 located inside the second housing 612 to be larger, and the area of ​​the blocking portion 622 on the damping member 62 that can block the airflow is also larger, thereby further improving the blocking effect on the supplementary airflow.

[0046] In some embodiments, such as Figure 2As shown, the second housing 612 features an optimized streamlined layout. The second housing 612 includes a connecting portion 6122 and a damping portion 6123 arranged along the first direction X1. The damping portion 6123 communicates with the first housing 611 via the connecting portion 6122, and a damping element 62 is disposed on the damping portion 6123, forming a multi-stage airflow damping structure. The connecting portion 6122 includes a first end 61221 and a second end 61222, wherein the first end 61221 communicates with the first housing 611, and the second end 61222 communicates with the damping portion 6123. In the third direction X3, the dimension of the first end 61221 is smaller than the dimension of the second end 61222. In other words, the dimension of the left end of the damping portion 6123 is smaller than the dimension of the right end, and the damping portion 6123 has a tapered structure. By setting it up in this way, the geometry of the airflow channel is optimized, which allows the connection between the first housing 611 and the second housing 612 to transition smoothly. When the airflow enters the first housing 612 from the second housing 611, the airflow can transition smoothly, which helps to reduce sudden changes in airflow speed and avoid the supplementary airflow from generating eddies or turbulence at the connection point, thereby indirectly improving the stability of the above-mentioned pneumatic wire feeding system.

[0047] In some embodiments, such as Figure 1 As shown, a tobacco collecting device 8 is also installed on the aforementioned branch return air duct 2. The tobacco collecting device 8 is located between the wind balancer 3 and the tobacco feeding device 4, and is used to collect tobacco from the tobacco feeding device 4.

[0048] The aforementioned wind-powered tobacco feeding system also includes a tobacco speed measuring component 9 and a first control valve 10. Specifically, the tobacco speed measuring component 9 is disposed between the tobacco collecting device 8 and the tobacco feeding device 4, and the first control valve 10 is disposed between the wind balancer 3 and the tobacco collecting device 8. Furthermore, the tobacco speed measuring component 9 and the first control valve 10 are coupled. The tobacco speed measuring component 9 can detect the speed of the tobacco between the tobacco feeding device 4 and the tobacco collecting device 8, and the first control valve 10 can control its opening and closing degree according to the speed of the tobacco detected by the tobacco speed measuring component 9. For example, the tobacco speed measuring component 9 includes a sensor unit and a signal processing unit. The sensor unit can acquire data such as the flow rate, flow rate, and density of the tobacco in the branch and return air ducts 2 in real time. This sensor unit is, for example, a microwave transmitter / receiver, a photoelectric sensor, a thermal anemometer, etc. The signal processing unit can convert analog signals into digital signals, eliminate noise interference, and generate control commands. This signal processing unit is, for example, a differential pressure transmitter, a Kalman filter module, an A / D converter, a PLC logic controller, etc. The aforementioned first control valve 10 is, for example, an electrically adjustable butterfly valve, an electrically proportional ball valve, or an electrically operated slide gate valve.

[0049] Through the above settings, the first control valve 10 can adaptively control its opening and closing degree based on the speed of the tobacco between the feeding device 4 and the collecting device 8, as measured by the tobacco speed measuring component 9, thereby controlling the speed of the tobacco between the feeding device 4 and the collecting device 8. That is, when the tobacco speed is too high, the opening and closing degree of the first control valve 10 decreases; when the tobacco speed is too high, the opening and closing degree of the first control valve 10 increases. This avoids an increase in tobacco breakage rate due to excessive tobacco speed, or an increase in tobacco stratification, accumulation, and friction damage due to insufficient tobacco speed, ensuring the quality of the tobacco during the conveying process.

[0050] In some embodiments, such as Figure 1 As shown, the aforementioned pneumatic tobacco feeding system also includes a leakage detection device 20. This leakage detection device 20 is installed in the aforementioned branch and return air ducts 2. The leakage detection device 20 can detect the leakage rate of the aforementioned branch and return air ducts 2. By installing the leakage detection device 20, the leakage rate in the pneumatic tobacco feeding system can be obtained in a timely manner, providing a reliable basis for daily inspection and maintenance. By promptly detecting and repairing potential leakage problems, not only can quality fluctuations caused by unstable airflow during tobacco feeding be avoided, but energy consumption can also be effectively reduced and the service life of the equipment extended. More importantly, the introduction of this device significantly improves the operational reliability of the pneumatic tobacco feeding system, providing a strong guarantee for the stability of the entire cigarette production process.

[0051] For example, such as Figure 1 As shown, a tobacco collecting device 8 is also installed on the aforementioned branch return air duct 2. The tobacco collecting device 8 is located between the wind balancer 3 and the tobacco feeding device 4, and is used to collect tobacco from the tobacco feeding device 4.

[0052] The aforementioned air leakage detection device 20 includes a first wind speed detection component 201 and a second wind speed detection component 202 disposed on the branch and return air ducts 2. The first wind speed detection component 201 is disposed between the wind balancer 3 and the yarn collecting device 8, and the second wind speed detection component 202 is disposed between the yarn collecting device 8 and the yarn feeding device 4. The first wind speed detection component 201 can detect the velocity of the airflow passing through the yarn collecting device 8 and the wind balancer 3, and the second wind speed detection component 202 can detect the velocity of the airflow passing through the yarn feeding device 4 and the yarn collecting device 8. The first wind speed detection component 201 is, for example, a thermal wind speed sensor or a mechanical cup sensor. The structure of the second wind speed detection component 202 is, for example, the same as that of the first wind speed detection component 201. By cooperating with the first wind speed detection component 201 and the second wind speed detection component 202, the air leakage rate of the aforementioned wind-powered yarn feeding system can be calculated. Specifically, the velocity of the airflow passing between the yarn collecting device 8 and the wind balancer 3, detected by the first wind speed detection component 201, is S1. The velocity of the airflow passing between the yarn feeding device 4 and the yarn collecting device 8, detected by the second wind speed detection component 202, is S2. The wind speed difference is obtained by subtracting S2 from S1. Then, the leakage rate of the wind-powered yarn feeding system is obtained by dividing the wind speed difference by S2. This configuration enables the detection of the leakage rate of the wind-powered yarn feeding system. It has a simple structure, is easy to install and maintain, and is convenient to use, indirectly improving the operational stability of the wind-powered yarn feeding system.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A wind-powered yarn feeding system, characterized in that, include: Main return air duct (1), one end of which is connected to the fan; Multiple branch return air ducts (2) are connected to the main return air duct (1) via a wind balancer (3); the wind balancer (3) can balance and stabilize the wind pressure in the multiple branch return air ducts (2); one end of the branch return air duct (2) away from the main return air duct (1) is connected to the wire feeding device (4); the branch return air duct (2) is provided with a makeup air port (21); The air supply duct (5) is connected at one end to the air supply port (21) and at the other end to the damping air supply assembly (6); the damping air supply assembly (6) can reduce the speed of the airflow entering the branch return air duct (2) through the air supply port (21); The damping air supply assembly (6) includes: a housing (61) and a damping element (62) disposed inside the housing (61); The damping element (62) can block the airflow.

2. The pneumatic yarn feeding system according to claim 1, characterized in that, The damping member (62) has a plurality of airflow holes (621) along a first direction (X1); the first direction (X1) is the flow direction of the airflow entering the branch return air duct (2) through the air supply port (21); on the damping member (62), the part outside the airflow holes (621) is a blocking part (622), and the blocking part (622) can block the flow of the airflow.

3. The pneumatic yarn feeding system according to claim 2, characterized in that, The number of damping elements (62) is multiple; the multiple damping elements (62) are arranged at intervals along the first direction (X1) inside the housing (61).

4. The pneumatic yarn feeding system according to claim 3, characterized in that, In the second direction (X2) and the third direction (X3), the air passages (621) on two adjacent blocking members are staggered; the first direction (X1), the second direction (X2) and the third direction (X3) are arranged at an angle to each other.

5. The pneumatic yarn feeding system according to claim 2, characterized in that, A sound-absorbing layer (7) is provided on the inner wall of the housing (61); and / or, a sound-absorbing layer (7) is provided on the inner wall of the air passage (621).

6. The pneumatic yarn feeding system according to claim 1, characterized in that, The housing (61) includes a first housing (611) and a second housing (612); One end of the first housing (611) is connected to the air supply pipe (5), and the other end is connected to the second housing (612); The second housing (612) has an air inlet (6121) at one end away from the first housing (611); in the third direction (X3), the size of the first housing (611) is smaller than the size of the second housing (612); the damping element (62) is disposed on the second housing (612); the third direction (X3) is set at an angle to the first direction (X1), and the first direction (X1) is the flow direction of the airflow entering the branch return air duct (2) through the air supply port (21).

7. The pneumatic yarn feeding system according to claim 6, characterized in that, The second housing (612) includes a connecting portion (6122) and a damping portion (6123) arranged along the first direction (X1); the damping portion (6123) communicates with the first housing (611) through the connecting portion (6122); the damping member (62) is disposed on the damping portion (6123); The connecting part (6122) includes a first end (61221) and a second end (61222). The first end (61221) is connected to the first housing (611), and the second end (61222) is connected to the damping part (6123). In the third direction (X3), the size of the first end (61221) is smaller than the size of the second end (61222).

8. The pneumatic yarn feeding system according to any one of claims 1 to 7, characterized in that, The branch return air duct (2) is also provided with a tobacco collecting device (8); the tobacco collecting device (8) is located between the wind balancer (3) and the tobacco feeding device (4) and is used to collect tobacco from the tobacco feeding device (4); The wind-powered tobacco feeding system also includes a tobacco speed measuring component (9) and a first control valve (10); the tobacco speed measuring component (9) is disposed between the tobacco collecting device (8) and the tobacco feeding device (4), and the first control valve (10) is disposed between the wind balancer (3) and the tobacco collecting device (8); The tobacco speed measuring component (9) is coupled to the first control valve (10); the tobacco speed measuring component (9) can detect the speed of the tobacco between the tobacco feeding device (4) and the tobacco collecting device (8); the first control valve (10) can control its opening and closing degree according to the speed of the tobacco detected by the tobacco speed measuring component (9).

9. The pneumatic yarn feeding system according to any one of claims 1 to 7, characterized in that, It also includes a leak detection device (20) installed in the branch return air duct (2); the leak detection device (20) can detect the leak rate of the branch return air duct (2).

10. The pneumatic yarn feeding system according to claim 9, characterized in that, The branch return air duct (2) is also provided with a tobacco collecting device (8); the tobacco collecting device (8) is located between the wind balancer (3) and the tobacco feeding device (4) and is used to collect tobacco from the tobacco feeding device (4); The air leakage detection device (20) includes a first wind speed detection component (201) and a second wind speed detection component (202) disposed on the branch return air duct (2); the first wind speed detection component (201) is disposed between the wind balancer (3) and the yarn collecting device (8), and the second wind speed detection component (202) is disposed between the yarn collecting device (8) and the yarn feeding device (4); the first wind speed detection component (201) can detect the speed of the airflow flowing between the yarn collecting device (8) and the wind balancer (3), and the second wind speed detection component (202) can detect the speed of the airflow flowing between the yarn feeding device (4) and the yarn collecting device (8).

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