Conveying equipment and automatic production device for paper straws

Abstract

The invention relates to conveying equipment and an automatic paper straw production device, the conveying equipment is used for conveying paper straws between cutting equipment and packaging equipment, and the conveying equipment comprises a conveying pipe fitting and an airflow generator. The inner diameter of the conveying pipe is larger than the outer diameter of the paper suction pipe. An air outlet of the airflow generator communicates with the cavity of the conveying pipe fitting, and the airflow generator is used for inputting hot airflow into the conveying pipe fitting so as to drive the paper suction pipe in the conveying pipe fitting to move in the extending direction of the conveying pipe fitting. The paper suction pipe is located in the conveying pipe fitting and moves in the extending direction of the conveying pipe fitting under the driving of the hot air flow, and therefore the conveying purpose is achieved. In addition, the hot air flow can take away moisture of the paper straw, and therefore the purpose of drying the paper straw is achieved. According to the conveying equipment, the conveying function and the drying function are integrated, the paper straws are dried while being conveyed, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of automated equipment, and in particular to a conveying device and an automated paper straw production device. Background Art

[0002] Paper straws are manufactured by winding and fixing a paper tape in an inclined direction multiple times. The paper strips are fixed in shape by adhesive bonding, so paper straws must go through a drying process during manufacturing.

[0003] In existing automated paper straw production devices, a cutting device cuts a tubular part into paper straws, a conveyor transports the paper straws to a drying device, and after the paper straws are dried, the conveyor transports the paper straws to a packaging device, where the packaging device packages the paper straws.

[0004] Currently, the production efficiency of automated paper straw production devices is low. Summary of the Invention

[0005] To solve the above technical problems, this application provides a conveying device and an automated paper straw production device to improve production efficiency.

[0006] On the one hand, this application provides a conveying device for transporting paper straws between a cutting device and a packaging device. The conveying device includes a conveying pipe fitting and an air flow generator. The inner diameter of the conveying pipe fitting is larger than the outer diameter of the paper straw. The air outlet of the air flow generator is communicated with the cavity of the conveying pipe fitting, and the air flow generator is used to input hot air into the conveying pipe fitting, thereby driving the paper straws in the conveying pipe fitting to move along the extending direction of the conveying pipe fitting.

[0007] In an embodiment of this application, the conveying pipe fitting has an air inlet hole that communicates its cavity with the outside. The air outlet of the air flow generator is communicated with the air inlet hole, and hot air is input into the conveying pipe fitting through the air inlet hole. The axis of the air inlet hole is inclined relative to the extending direction so that the flow direction of the hot air flowing in through the air inlet hole forms an acute angle with the extending direction.

[0008] In an embodiment of this application, the number of air inlet holes is multiple, and the air outlets of the air flow generator are respectively communicated with each air inlet hole; the multiple air inlet holes are spaced circumferentially on the conveying pipe fitting, and / or, the multiple air inlet holes are spaced along the extending direction.

[0009] In an embodiment of this application, the conveying device further includes a valve, and the valve is arranged on the conveying pipe fitting for adjusting the cross-sectional size of the air inlet hole.

[0010] In one embodiment of the present application, the number of conveying pipe fittings is at least two. The at least two conveying pipe fittings include a first conveying pipe fitting and a second conveying pipe fitting. The first conveying pipe fitting extends in a first direction, and the second conveying pipe fitting extends in a second direction. The conveying device further includes a commutation assembly, which is used to receive the paper straws conveyed by the first conveying pipe fitting and adjust the posture of the paper straws for the second conveying pipe fitting to continue conveying.

[0011] In one embodiment of the present application, the commutation assembly includes a turntable, a driver, and an ejector. The turntable is rotatably arranged. The turntable has a bearing hole, the aperture of the bearing hole is larger than the outer diameter of the paper straw, the bearing hole extends in the radial direction of the turntable, and an opening is formed at the outer side in the radial direction. The driver is used to drive the turntable to rotate so that the bearing hole is selectively in a first posture and a second posture. When in the first posture, the first conveying pipe fitting is coaxially arranged with the bearing hole. When in the second posture, the second conveying pipe fitting is coaxially arranged with the bearing hole. The ejector is used to drive the paper straw to disengage from the bearing hole in the second direction when the bearing hole is in the second posture.

[0012] In one embodiment of the present application, the commutation assembly further includes a blocking member, which is arranged around the outer side of the turntable in the radial direction. During the switching process of the bearing hole between the first posture and the second posture, the blocking member blocks the opening. Among them, the ejector can elastically deform in the radial direction of the turntable. The ejector is used to abut against the paper straw in the radial direction of the turntable and apply an elastic force radially outward to the paper straw.

[0013] In one embodiment of the present application, the ejector includes a movable member and an elastic member. The movable member is slidably fitted to the turntable in the radial direction and is used to abut against the paper straw in the radial direction. The elastic member elastically abuts between the movable member and the turntable in the radial direction.

[0014] In one embodiment of the present application, the number of bearing holes is multiple, and the multiple bearing holes are arranged at intervals in the circumferential direction of the turntable. Among them, the driver is used to drive the turntable to rotate along a predetermined circumferential direction. Among two adjacent bearing holes along the predetermined circumferential direction, the one located on the upstream side is the first bearing hole, and the one located on the downstream side is the second bearing hole. When the first bearing hole is in the first posture, the second bearing hole is in the second posture.

[0015] On the other hand, the present application further provides a paper straw automatic production device, which includes a winding device, a cutting device, a conveying device, and a packaging device. The winding device is used to wind the paper into a continuous tubular part. The cutting device is used to cut the tubular part to form paper straws. The conveying device is used to convey the paper straws from the cutting device to the packaging device, and the conveying device is the above-mentioned conveying device. The packaging device is used to pack the paper straws into packaging bags.

[0016] The above technical solutions of the present application have the following advantages compared with the prior art: The paper straw is located inside the conveying pipe fitting and moves along the extending direction of the conveying pipe fitting under the drive of the hot air flow, thereby achieving the purpose of conveying. In addition, the hot air flow can take away the moisture of the paper straw, thereby achieving the purpose of drying the paper straw. The conveying device of the present application integrates the conveying function and the drying function, and dries the paper straw while conveying, improving the production efficiency. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0018] Figure 1 is a schematic diagram of an automatic production device for paper straws according to an embodiment of the present application; Figure 2 is a schematic structural diagram of a conveying device according to an embodiment of the present application; Figure 3 is Figure 2 an enlarged view of the partial view A in Figure 4 is Figure 2 a sectional view taken along E1-E1 in Figure 5 is a schematic structural diagram of a conveying device according to another embodiment of the present application; Figure 6 is Figure 5 an enlarged view of the partial view in

[0019] Explanation of the reference numerals in the drawings of the specification: 1 - winding device; 2 - cutting device; 3 - conveying device; 4 - packaging device; 10 - conveying pipe fitting; 10A - first conveying pipe fitting; 10B - second conveying pipe fitting; 110 - air inlet hole; 120 - cavity; 20 - air flow generator; 210 - air outlet; 30 - valve; 40 - paper straw; 50 - commutation assembly; 510 - turntable; 511 - bearing hole; 512 - open end; 520 - ejector; 521 - elastic member; 522 - movable member; 530 - blocking member; D0 - flow direction; D1 - first direction; D2 - second direction; D3 - third direction; L - axis. Detailed Embodiments

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, rather than all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0021] Please refer to Figure 1 , Figure 1 which is a schematic diagram of an automatic production device for paper straws 40 according to an embodiment of this application.

[0022] The automatic production device for paper straws 40 includes a winding device 1, a cutting device 2, a conveying device 3, and a packaging device 4. The winding device 1 is used to wind paper into a continuous tubular part. The cutting device 2 is used to cut the tubular part to form paper straws 40. The conveying device 3 is used to convey the paper straws 40 from the cutting device 2 to the packaging device 4. The packaging device 4 is used to package the paper straws 40 into packaging bags.

[0023] The core function of the winding device 1 is to accurately wind paper into a continuous tubular part. In some embodiments, the winding device 1 includes an unwinding mechanism, a gluing mechanism, and a winding and forming mechanism. The unwinding mechanism uses an adjustable paper roll mounting shaft, which can adapt to paper rolls of different specifications, realizes a smooth unwinding action through motor drive, and is equipped with an automatic deviation correction system to monitor the edge position of the paper in real time. When deviation occurs, it is quickly adjusted by a cylinder or a servo motor to ensure that the paper remains centered during the unwinding process and provides a stable raw material input for subsequent processes. The gluing mechanism uses a high-precision metering pump, which can accurately control the amount of glue applied according to the paper thickness and material. The common gluing method is roll coating, and the glue is evenly coated on one side of the paper through a gluing roller. The surface of the gluing roller has been specially treated, with good glue affinity and wear resistance, which can ensure uniform glue application and no glue leakage. The winding and forming mechanism makes the paper helically wind around a rotating metal mandrel at a certain angle (usually 15° - 30°), and the adjacent edges overlap and bond.

[0024] The cutting device 2 is responsible for cutting the continuous tubular parts into independent paper straws 40 according to the specified length. In some embodiments, the cutting device 2 comprises a feeding mechanism, a cutting mechanism, a length detection device and a waste collection device. The feeding mechanism uses a conveyor belt driven by a servo motor, and the surface of the conveyor belt is provided with anti-slip patterns, which can stably convey the tubular parts. The feeding speed can be adjusted according to production requirements, and a positioning sensor is equipped to ensure the accurate position of the tubular parts during each conveyance. In the cutting mechanism, common cutting methods include blade cutting and laser cutting. Blade cutting uses a high-speed rotating circular blade, and the blade is driven up and down by a cylinder or a servo motor to quickly cut the tubular parts. Laser cutting uses a laser beam with a high energy density to instantaneously melt or vaporize the material of the tubular parts. The length detection device uses a photoelectric sensor or a laser rangefinder to detect the length of the cut paper straw 40 in real time. When it is detected that the length of the paper straw 40 does not meet the set requirements, the control system will immediately issue an alarm and automatically adjust the position of the cutting mechanism or the speed of the feeding mechanism to ensure that the lengths of the subsequent cut paper straws 40 are consistent. The waste collection device is arranged below the cutting mechanism, and the waste generated during the cutting process is collected by means of negative pressure suction or conveyor belt conveyance for centralized treatment.

[0025] The conveying device 3 smoothly and efficiently conveys the cut paper straws 40 from the cutting device 2 to the packaging device 4. The conveying device 3 is an improvement point of this application and will be described in detail below.

[0026] The main function of the packaging device 4 is to package the conveyed paper straws 40 into packaging bags for easy storage and transportation. In some embodiments, the packaging device 4 includes a paper straw sorting mechanism, a metering device, a bag-making mechanism, a sealing mechanism, and a labeling mechanism. The paper straw sorting mechanism sorts and arranges the paper straws 40 through devices such as a vibrating disk, a conveyor belt, and a lever, and conveys them neatly to the packaging station in a specified direction and order. The metering device precisely controls the number of paper straws 40 entering the packaging bag by means of photoelectric counting or weighing. Photoelectric counting counts the passing paper straws 40 through a photoelectric sensor. When the set number is reached, the metering device sends a signal to stop the conveyance of the paper straws 40. Weighing measures the weight of the paper straws 40 in the packaging bag through a weight sensor. When the weight reaches the set value, the filling of the paper straws 40 is stopped to ensure that the number or weight of the paper straws 40 in each packaging bag meets the requirements. The bag-making mechanism manufactures the required packaging bags according to the specifications and styles of the packaging bags. Common bag-making methods include three-side sealing, four-side sealing, and stand-up bag making. The bag-making mechanism forms and seals the packaging material through processes such as heating, pressurizing, and cutting to produce a complete packaging bag. The sealing mechanism seals the packaging bag containing the paper straws 40. Common sealing methods include heat sealing, cold sealing, and ultrasonic sealing. Heat sealing heats the sealing area of the packaging bag through a heating strip to melt and bond the packaging materials together. Cold sealing uses glue or an adhesive to bond the sealing area of the packaging bag. Ultrasonic sealing uses the high-frequency vibration of ultrasonic waves to cause the molecules of the packaging material to rub against each other to generate heat, thereby achieving sealing.

[0027] The specific implementation manners of the winding device 1, the cutting device 2, and the packaging device 4 are not limited to the above examples, and other reasonable structures can also be adopted.

[0028] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of the conveying device 3 according to an embodiment of the present application.

[0029] The conveying device 3 is used to convey the paper straws 40 between the cutting device 2 and the packaging device 4. The conveying device 3 includes a conveying pipe fitting 10 and an air flow generator 20. The inner diameter of the conveying pipe fitting 10 is larger than the outer diameter of the paper straws 40. The air outlet 210 of the air flow generator 20 is communicated with the cavity 120 of the conveying pipe fitting 10. The air flow generator 20 is used to input hot air into the conveying pipe fitting 10, thereby driving the paper straws 40 in the conveying pipe fitting 10 to move along the extending direction of the conveying pipe fitting 10.

[0030] Both ends of the conveying pipe fitting 10 are open to allow the paper straw 40 to enter and exit. The cross-sectional shape of the conveying pipe fitting 10 matches the cross-sectional shape of the paper straw 40, so that the gap formed between the outer wall surface of the paper straw 40 and the inner wall surface of the conveying pipe fitting 10 is uniform in the circumferential direction of the paper straw 40. Generally, the paper straw 40 is cylindrical, and correspondingly, the conveying pipe fitting 10 is cylindrical.

[0031] As the channel for the transmission of the paper straw 40, the structural design of the conveying pipe fitting 10 directly affects the transmission stability and efficiency. In some embodiments, the conveying pipe fitting 10 is made of high-strength, wear-resistant food-grade plastic or stainless steel, which not only ensures the material safety but also extends the service life of the equipment. To further reduce the risk of jamming of the paper straw 40, the inner wall of the conveying pipe fitting 10 is finely polished, and the roughness Ra value is controlled below 0.8μm to form an ultra-smooth surface, greatly reducing the friction force between the paper straw 40 and the pipe wall.

[0032] The conveying pipe fitting 10 extends along a predetermined path. This predetermined path is usually a straight path to avoid jamming of the paper straw 40. In some cases, this predetermined path can also be an arc path. When the radius of this arc path is large enough, it can also reduce the probability of jamming of the paper straw 40. In addition to the straight path and the large-radius arc path, some complex production lines will adopt a combined path. For example, in a space-constrained area, a "Z" - shaped or "U" - shaped path design is adopted, and by adding steering buffer devices such as flexible guide plates and adaptive steering wheel groups, it is ensured that the paper straw 40 can also make a smooth transition when turning. The surface of the guide plate is covered with an elastic silica gel layer, which can effectively prevent the paper straw 40 from being deformed or damaged due to collision. The adaptive steering wheel group can automatically adjust the angle according to the conveying speed and direction of the paper straw 40 to ensure the smooth turning of the paper straw 40.

[0033] Observation windows are arranged at certain intervals in the middle of the conveying pipe fitting 10 and are made of high-temperature resistant transparent materials, which is convenient for operators to observe the conveying state of the paper straw 40 in real time and discover abnormal situations in time.

[0034] In some embodiments, the air flow generator 20 includes a blower and a heating element. The air blown out by the blower flows through the heating element, so that the air is heated into a hot air flow.

[0035] In some embodiments, the blower is also equipped with an intelligent speed regulation system, which can automatically adjust the blower speed by using sensors to monitor the air pressure in the conveying pipe fitting 10 and the conveying state of the paper straw 40 in real time, so as to achieve energy-saving operation.

[0036] In some embodiments, the heating element uses a high-precision spiral resistance wire, and the surface of the resistance wire is coated with a high-temperature resistant insulating coating to prevent electric leakage. To improve the heating efficiency and the uniformity of the hot air flow, the heating element is arranged in a tapered heating cavity at the air outlet of the fan. When the air passes through the heating cavity, it comes into full contact with the resistance wire and quickly heats up. The inner wall of the heating cavity is provided with a flow guide plate to evenly disperse the hot air flow and avoid local overheating or uneven temperature.

[0037] To ensure the safe operation of the equipment, the air flow generator 20 is provided with multiple safety protection mechanisms. The temperature sensor monitors the temperature of the hot air flow in real time. When the temperature exceeds the set threshold, the power supply of the resistance wire is immediately cut off, and the fan is started for forced cooling to prevent fires or carbonization of the paper straw 40 caused by excessive temperature. The overpressure protection device monitors the air pressure inside the fan in real time. When the air pressure rises abnormally, the pressure relief valve is automatically opened to protect the fan and the conveying pipe fitting 10 from damage.

[0038] The paper straw 40 is located inside the conveying pipe fitting 10 and moves along the extending direction of the conveying pipe fitting 10 under the drive of the hot air flow, thus achieving the purpose of conveying. In addition, the hot air flow can take away the moisture of the paper straw 40, thus achieving the purpose of drying the paper straw 40. The conveying device 3 of the present application integrates the conveying function and the drying function, and performs the drying operation on the paper straw 40 while conveying, improving the production efficiency.

[0039] In the traditional production process of the paper straw 40, the conveying and drying need to be completed step by step on different equipment, while the conveying device 3 integrates the conveying and drying functions, eliminating the intermediate handling and waiting links. Taking a production line that produces 200 paper straws 40 per minute as an example, in the traditional method, the drying link needs to occupy an additional 3 - 5 minutes. After using this equipment, the drying is synchronously completed during the conveying process, saving about 2 - 3 hours of production time per day, and increasing the annual output by 15% - 20%.

[0040] The hot air flow driving method has higher conveying speed and flexibility compared with the traditional conveyor belt conveying. The conveying speed of the conveyor belt is generally 0.5 - 1 m / s, while the conveying speed of the hot air flow can reach 5 - 20 m / s. At the same time, the air flow generator 20 can quickly adjust the wind speed according to the production requirements to achieve the rapid conveying and precise control of the paper straw 40, further improving the production efficiency.

[0041] During the traditional conveyor belt conveying process, the paper straw 40 is easily scratched, deformed and other damaged due to the friction and extrusion with components such as the conveyor belt and the guide roller. While this equipment uses non-contact hot air flow conveying, the paper straw 40 is suspended inside the conveying pipe fitting 10, avoiding direct contact with other components and effectively reducing the product defect rate. After actual testing, after using this equipment, the damage rate of the paper straw 40 caused by conveying is reduced from the original 3% - 5% to less than 0.5%.

[0042] The hot air flow is evenly distributed within the conveying pipe fitting 10, capable of comprehensively and evenly carrying away the moisture on the surface and inside of the paper straw 40, avoiding problems such as deformation and cracking of the paper straw 40 caused by uneven local heating in the traditional drying method. Meanwhile, precise temperature control ensures the stability of the drying process, ensuring that the drying degree of each paper straw 40 is consistent and improving the consistency of product quality. Additionally, the hot air flow can also separate the powder generated during cutting from the paper straw 40.

[0043] Please refer to Figure 3 , Figure 3 is Figure 2 an enlarged view of the partial view A in

[0044] In some embodiments, the conveying pipe fitting 10 has an air inlet hole 110 that communicates its cavity 120 with the outside. The air outlet 210 of the air flow generator 20 is in communication with the air inlet hole 110, and hot air flow is input into the conveying pipe fitting 10 through the air inlet hole 110. The axis L of the air inlet hole 110 is inclined relative to the extending direction, so that the flow direction D0 of the hot air flow flowing in through the air inlet hole 110 forms an acute angle with the extending direction.

[0045] Specifically, the number of the air inlet holes 110 is multiple, and the air outlet 210 of the air flow generator 20 is respectively in communication with each air inlet hole 110. Figure 2 The pipeline realizing the communication between the air outlet 210 and the air inlet hole 110 is represented by a dotted line in Figure 2 Only a part of the pipeline is schematically shown in this figure. In this embodiment, a plurality of air inlet holes 110 are provided on the side wall of the conveying pipe fitting 10, and the axis L of each air inlet hole 110 has an included angle θ (usually 15° - 45°) with the extending direction (the first direction D1) of the conveying pipe fitting 10.

[0046] Specifically, the multiple air inlet holes 110 are arranged at intervals in the circumferential direction of the conveying pipe fitting 10, and / or the multiple air inlet holes 110 are arranged at intervals along the extending direction. Here, "and / or" includes three cases. Case one: The multiple air inlet holes 110 are arranged at intervals in the circumferential direction of the conveying pipe fitting 10; Case two: The multiple air inlet holes 110 are arranged at intervals along the extending direction; Case three: The multiple air inlet holes 110 are arranged at intervals in the circumferential direction of the conveying pipe fitting 10, and the multiple air inlet holes 110 are arranged at intervals along the extending direction.

[0047] In Case 1, multiple air inlet holes 110 blow out multiple hot air streams. The multiple hot air streams are arranged circumferentially around the paper straw 40, making it easier for the paper straw 40 to be suspended. In Case 2, multiple air inlet holes 110 blow out multiple hot air streams. The multiple hot air streams are arranged along the extension direction of the conveying pipe fitting 10, so that the driving force continuously acts on the paper straw 40, and then the paper straw 40 can continuously and stably move along the extension direction of the conveying pipe fitting 10. Case 3 combines the advantages of Case 1 and Case 2.

[0048] Specifically, in Case 3, there are two distribution methods for the air inlet holes 110: spiral distribution and segmented distribution.

[0049] The spiral distribution means that all the air inlet holes 110 are arranged in a spiral on the outer surface of the conveying pipe fitting 10. This distribution method makes the hot air flow form a spiral flow path in the conveying pipe fitting 10, enhancing the rotational driving force on the paper straw 40 and preventing the paper straw 40 from deviating during the conveying process.

[0050] Please refer to Figure 4 , Figure 4 which is Figure 2 the cross-sectional view E1-E1 in

[0051] The segmented distribution (such as the embodiment shown in Figure 2 ) divides the conveying pipe fitting 10 into several segments along the axial direction. The air inlet holes 110 in each segment are evenly distributed in a ring. This distribution method is suitable for long-distance conveying and can form independent air flow control units in different sections.

[0052] In some embodiments, to achieve precise control of the flow rate, the conveying device 3 further includes a valve 30. The valve 30 is arranged on the conveying pipe fitting 10 and is used to adjust the cross-sectional size of the air inlet holes 110. The air outlet 210 of the air flow generator 20 is connected to the valve 30 and communicates with the air inlet through the valve 30. Specifically, in the embodiment shown in Figure 2 , the number of valves 30 is multiple, and the valves 30 correspond to the air inlet holes 110 one by one. Each valve 30 is used to adjust the cross-sectional size of the corresponding air inlet hole 110. In an application scenario, by adjusting the opening degrees of the valves 30 at different positions in the circumferential direction, the acting forces of the hot air flowing into the air inlet holes 110 at different positions in the circumferential direction on the paper straw 40 are different, and then the paper straw 40 is suspended more stably.

[0053] In some embodiments, to achieve precise control of the air inlet angle, adjustable guide vanes are arranged at the air inlet holes 110. The guide vanes are made of high-temperature resistant plastic or metal materials and are driven to rotate by a servo motor to adjust the air inlet angle.

[0054] Please refer to Figure 3, the force F exerted by the hot air flow on the paper straw 40 can be decomposed into a first component force F1 along the conveying direction and a second component force F2 perpendicular to the conveying direction. By establishing a hydrodynamic model, the following relational expressions can be derived: F = ρQv; F1 = F⋅cosθ = ρQv⋅cosθ; F2 = F⋅sinθ = ρQv⋅sinθ; Where ρ is the density of the hot air flow, Q is the intake air flow rate, v is the velocity of the hot air flow, and θ is the angle between the first direction D1 and the flow direction D0 of the hot air flow flowing in through the intake hole 110.

[0055] When θ = 30°, F1 / F2 ≈ 1.73. At this time, sufficient propulsion force can be provided, and an appropriate suspension gap can be maintained between the paper straw 40 and the pipe wall. Through CFD (Computational Fluid Dynamics) simulation analysis, when θ is between 25° - 40° and the hot air flow velocity is between 8 - 15 m / s, the suspension stability of the paper straw 40 is the best, and the wall friction coefficient can be reduced to less than 0.05.

[0056] In practical applications, the intake air parameters can be optimized according to the diameter and weight of the paper straw 40. For a conventional paper straw 40 with a diameter of 6 - 8 mm, θ is recommended to be 30° - 35°, and the hot air flow velocity is 10 - 12 m / s; for a thick-diameter paper straw 40 with a diameter of 10 - 12 mm, θ is recommended to be 35° - 40°, and the hot air flow velocity is 12 - 15 m / s. Through this refined parameter matching, efficient suspension transportation can be ensured for paper straws 40 of different specifications.

[0057] In this embodiment, the hot air flow not only drives the paper straw 40 to move along the extension direction of the conveying pipe fitting 10, but also can reduce the probability of contact between the paper straw 40 and the inner wall surface of the conveying pipe fitting 10 during the movement process, improving the transportation efficiency of the paper straw 40 and reducing the probability of wear of the paper straw 40.

[0058] When the conveying path of the conveying pipe fitting 10 is a straight path, compared with a curved path, the probability of jamming of the paper straw 40 can be reduced, and the paper straw 40 can be conveyed more smoothly. To reduce the space occupied by the conveying device 3, the following improvements are also made.

[0059] Please refer to Figure 5 . Figure 5 It is a schematic structural diagram of the conveying device 3 according to another embodiment of the present application.

[0060] In some embodiments, the number of the conveying pipe fittings 10 is at least two. The at least two conveying pipe fittings 10 include a first conveying pipe fitting 10A and a second conveying pipe fitting 10B. The first conveying pipe fitting 10A extends along a first direction D1, and the second conveying pipe fitting 10B extends along a second direction D2. The conveying device 3 further includes a commutation assembly 50. The commutation assembly 50 is configured to receive the paper straws 40 conveyed by the first conveying pipe fitting 10A and adjust the postures of the paper straws 40 for the second conveying pipe fitting 10B to continue the conveyance.

[0061] The first direction D1 and the second direction D2 are different directions. In the illustrated embodiment, the included angle between the first direction D1 and the second direction D2 is an obtuse angle. In some other embodiments, the included angle between the first direction D1 and the second direction D2 may be an acute angle or a right angle. In some other embodiments, the first direction D1 and the second direction D2 are opposite to each other.

[0062] As an elongated tubular object, the paper straw 40 needs to avoid deformation or damage caused by bending and twisting during the conveyance process. When the first conveying pipe fitting 10A and the second conveying pipe fitting 10B extend along different directions respectively, if there is no commutation assembly 50, the paper straw 40 will inevitably experience complex curvilinear motion or even jamming when being transferred from one pipe fitting to another. The commutation assembly 50 gradually adjusts the motion direction of the paper straw 40 to be consistent with the extending direction of the second conveying pipe fitting 10B, thereby avoiding the adverse effects caused by the sudden change of the motion path and ensuring the smoothness of the conveyance of the paper straw 40.

[0063] The first conveying pipe fitting 10A and the second conveying pipe fitting 10B are arranged in different directions, which can be flexibly arranged according to the actual site shape, equipment installation position and production process requirements. When the included angle between the first direction D1 and the second direction D2 is an obtuse angle, this layout method can effectively utilize the corner space of the site and skillfully plan the conveying path in the irregular area; if the included angle is an acute angle, a compact U-shaped or Z-shaped conveying path design can be realized to complete a long-distance conveyance in a limited space; when the included angle is a right angle, it is convenient to be vertically or horizontally arranged with other equipment, production lines or channels in the production workshop, improving the space utilization rate; even if the first direction D1 and the second direction D2 are opposite to each other, a reciprocating conveyance can be realized, and the conveying distance can be extended without increasing the lateral space occupation. Through this diversified setting of the pipe fitting directions and in combination with the cooperation of the commutation assembly 50, the conveying device 3 can better adapt to different production environments and process requirements, thereby reducing the overall occupied space and improving the use efficiency of the production site.

[0064] Please continue to refer to Figure 5 and Figure 6 , Figure 6 is Figure 5An enlarged view of the partial view. The specific structure of the commutation assembly 50 will be introduced in detail below.

[0065] In some embodiments, the commutation assembly 50 includes a turntable 510, a driver (not shown in the figure), and an ejector 520. The turntable 510 is rotatably arranged. The turntable 510 has a bearing hole 511, the aperture of the bearing hole 511 is larger than the outer diameter of the paper straw 40, the bearing hole 511 extends radially in the turntable 510, and an opening 512 is formed by opening to the outside in the radial direction. The driver is used to drive the turntable 510 to rotate so that the bearing hole 511 is selectively in a first posture and a second posture. When in the first posture, the first conveying pipe fitting 10A is coaxially arranged with the bearing hole 511. When in the second posture, the second conveying pipe fitting 10B is coaxially arranged with the bearing hole 511. The ejector 520 is used to drive the paper straw 40 to disengage from the bearing hole 511 in the second direction D2 when the bearing hole 511 is in the second posture.

[0066] The turntable 510 is rotatably arranged about its own axis. The driver is, for example, a motor, and the motor drives the turntable 510 to rotate. The aperture of the bearing hole 511 is larger than the outer diameter of the paper straw 40, and the length of the bearing hole 511 is greater than the length of the paper straw 40. The bearing hole 511 is used to accommodate the paper straw 40. The opening 512 is used for the paper straw 40 to enter and exit the bearing hole 511.

[0067] Figure 6 In [the figure], when the bearing hole 511 is at the P1 position, it is in the first posture, and when the bearing hole 511 is at the P2 position, it is in the second posture.

[0068] When in the first posture, the opening 512 of the bearing hole 511 is oppositely arranged with the outlet of the first conveying pipe fitting 10A. Driven by the hot air flow in the first conveying pipe fitting 10A, the paper straw 40 enters the bearing hole 511 through the opening 512.

[0069] When in the second posture, the opening 512 of the bearing hole 511 is oppositely arranged with the inlet of the second conveying pipe fitting 10B. Driven by the ejector 520, the paper straw 40 disengages from the bearing hole 511 and enters the second conveying pipe fitting 10B.

[0070] In some embodiments, the commutation assembly 50 further includes a blocking member 530. The blocking member 530 is disposed around the outer side of the turntable 510 in the radial direction. During the switching process of the bearing hole 511 between the first posture and the second posture, the blocking member 530 blocks the opening 512. Among them, the ejector 520 can elastically deform in the radial direction of the turntable 510. The ejector 520 is used to abut against the paper straw 40 in the radial direction of the turntable 510 and apply an elastic force radially outward to the paper straw 40.

[0071] In the first posture, driven by the hot air flow in the first conveying pipe fitting 10A, the paper straw 40 enters the bearing hole 511 through the open end 512, and under the pushing action of the remaining paper straws 40, the blocking member 530 is squeezed along the first direction D1, so that the blocking member 530 is compressed until the paper straw 40 completely enters the bearing hole 511. Then, the driver drives the turntable 510 to rotate in the third direction D3, so that the bearing hole 511 is switched to the second posture. During the process of the bearing hole 511 being switched from the first posture to the second posture, the blocking member 530 blocks the open end 512, so that the paper straw 40 will not be pushed out of the bearing hole 511 by the elastic force of the blocking member 530. In the second posture, driven by the ejecting member 520, the paper straw 40 disengages from the bearing hole 511 and enters the second conveying pipe fitting 10B.

[0072] In some embodiments, the ejecting member 520 includes a movable member 522 and an elastic member 521. The movable member 522 is slidably fitted to the turntable 510 in the radial direction and is used to abut against the paper straw 40 in the radial direction. The elastic member 521 elastically abuts between the movable member 522 and the turntable 510 in the radial direction. The elastic member 521 is, for example, a spring.

[0073] In some embodiments, the number of the bearing holes 511 of the conveying device 3 is multiple, and the multiple bearing holes 511 are arranged at intervals in the circumferential direction of the turntable 510. Among them, the driver is used to drive the turntable 510 to rotate in the third direction D3. Among the two adjacent bearing holes 511 in the third direction D3, the first bearing hole is located on the upstream side and the second bearing hole is located on the downstream side. When the first bearing hole is in the first posture, the second bearing hole is in the second posture.

[0074] In the case where only one bearing hole 511 is provided, after the bearing hole 511 is switched from the first posture to the second posture and then switched from the second posture to the first posture, the transfer operation of one paper straw 40 can be completed, and the efficiency is relatively low. In this embodiment, multiple bearing holes 511 can continuously transfer the paper straws 40, which can improve the efficiency.

[0075] The commutation assembly 50 can also adopt other structures. In some embodiments, a belt conveyor is arranged between the first conveying pipe fitting 10A and the second conveying pipe fitting 10B, and the attitude of the paper straw 40 flowing out of the first conveying pipe fitting 10A is adjusted through the belt conveyor, and then it is input into the second conveying pipe fitting 10B. Note that the above is only the preferred embodiment of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments only. Without departing from the concept of the present application, it can also include more other equivalent embodiments, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A conveying device for conveying paper straws (40) between a cutting device (2) and a packaging device (4), characterized in that, The conveying device includes: a conveying pipe fitting (10), the inner diameter of the conveying pipe fitting (10) being larger than the outer diameter of the paper straw (40); and an air flow generator (20), an air outlet (210) of the air flow generator (20) communicating with a cavity (120) of the conveying pipe fitting (10), the air flow generator (20) being configured to input hot air into the conveying pipe fitting (10), thereby driving the paper straw (40) in the conveying pipe fitting (10) to move along the extending direction of the conveying pipe fitting (10).

2. The conveying device according to claim 1, characterized in that, The conveying pipe fitting (10) has an air inlet hole (110) that communicates its cavity (120) with the outside, the air outlet (210) of the air flow generator (20) communicating with the air inlet hole (110), and inputting the hot air into the conveying pipe fitting (10) through the air inlet hole (110), an axis (L) of the air inlet hole (110) being inclined relative to the extending direction such that an included angle between a flowing direction (D0) of the hot air flowing in through the air inlet hole (110) and the extending direction is an acute angle.

3. The conveying device according to claim 2, characterized in that, The number of the air inlet holes (110) is multiple, the air outlet (210) of the air flow generator (20) communicating with each of the air inlet holes (110) respectively; the multiple air inlet holes (110) are arranged at intervals in the circumferential direction of the conveying pipe fitting (10), and / or, the multiple air inlet holes (110) are arranged at intervals along the extending direction.

4. The conveying device according to claim 3, characterized in that, It further includes a valve (30), the valve (30) being arranged on the conveying pipe fitting (10) for adjusting a cross-sectional size of the air inlet hole (110).

5. The conveying device according to claim 1, wherein the number of the conveying pipe fittings (10) is at least two, the at least two conveying pipe fittings (10) including a first conveying pipe fitting (10A) and a second conveying pipe fitting (10B), the first conveying pipe fitting (10A) extending along a first direction (D1), the second conveying pipe fitting (10B) extending along a second direction (D2); the conveying device further includes a commutation assembly (50), the commutation assembly (50) being configured to receive the paper straw (40) conveyed by the first conveying pipe fitting (10A) and adjust an attitude of the paper straw (40) for continuous conveyance by the second conveying pipe fitting (10B).

6. The conveying device according to claim 5, characterized in that The commutation assembly (50) includes: a turntable (510), the turntable (510) being rotatably arranged, the turntable (510) having a bearing hole (511), a diameter of the bearing hole (511) being larger than the outer diameter of the paper straw (40), the bearing hole (511) extending in a radial direction of the turntable (510) and being open at an outer side in the radial direction to form an opening (512); A driver for driving the turntable (510) to rotate so that the carrying hole (511) is selectively in a first posture and a second posture. When in the first posture, the first conveying pipe fitting (10A) is coaxially arranged with the carrying hole (511). When in the second posture, the second conveying pipe fitting (10B) is coaxially arranged with the carrying hole (511). An ejector (520) for driving the paper straw (40) to disengage from the carrying hole (511) in the second direction (D2) when the carrying hole (511) is in the second posture.

7. The conveying device according to claim 6, wherein, The commutation assembly (50) further includes a blocking member (530) surrounding the radial outer side of the turntable (510). During the switching process of the carrying hole (511) between the first posture and the second posture, the blocking member (530) blocks the open end (512). Wherein, the ejector (520) can elastically deform in the radial direction of the turntable (510), and the ejector (520) is used to radially abut against the paper straw (40) and apply an elastic force radially outward to the paper straw (40).

8. The conveying device according to claim 7, wherein The ejector (520) includes: A movable member (522) slidably engaged with the turntable (510) in the radial direction for radially abutting against the paper straw (40). An elastic member (521) elastically abutting between the movable member (522) and the turntable (510) in the radial direction.

9. The conveying device according to claim 6, characterized in that, The number of the carrying holes (511) is multiple, and the multiple carrying holes (511) are circumferentially spaced on the turntable (510). Wherein, the driver is used to drive the turntable (510) to rotate in a third direction. Among two adjacent carrying holes (511) along the third direction, the one on the upstream side is the first carrying hole (511), and the one on the downstream side is the second carrying hole (511). When the first carrying hole (511) is in the first posture, the second carrying hole (511) is in the second posture.

10. An automatic production device for paper straws, characterized in that, Including: A winding device (1) for winding paper into a continuous tubular member. A cutting device (2) for cutting the tubular member to form a paper straw (40). A conveying device (3) for conveying the paper straw (40) from the cutting device (2) to the packaging device (4), and the conveying device (3) is the conveying device (3) according to any one of claims 1-9; A packaging device (4) for packaging the paper straw (40) into a packaging bag.

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