An electrospinning device for preparing nanofiber yarns and blended yarns

Abstract

The application discloses an electrostatic spinning device for preparing nanofiber yarn and blended yarn, and relates to the technical field of blended yarn, which comprises a liquid supply assembly, a wire guide assembly, a high-voltage generator, a spinning head assembly, a ring-shaped guide rail, a collection assembly, a control system and a yarn drum, wherein the liquid supply assembly is used for storing and ensuring continuous and stable supply of the spinning liquid to the spinning head assembly during the spinning process, and the liquid supply assembly adopts a dynamic liquid supply mode and rotates together with the spinning head assembly. Through the arrangement of the collector, the collection rod and the short rod, the collection rod can be composed into various specific shapes, the electric field distribution formed by the spinning head at the high-voltage end can be adjusted and changed after the collector is grounded, the function of adjusting the electrostatic spinning electric field distribution is realized, the form and structure of the fiber can be accurately controlled, the fiber is more uniform and delicate, and has better performance, and the effect of the electrostatic spinning device for preparing nanofiber yarn and blended yarn is improved.

Description

Technical Field

[0001] This invention relates to the field of blended yarn technology, specifically to an electrospinning device for preparing nanofiber yarns and blended yarns. Background Technology

[0002] The most prominent characteristic of nanofibers is their large specific surface area, resulting in small size effects, surface effects, quantum size effects, and macroscopic quantum tunneling effects. These properties lead to unique chemical and physical characteristics (thermal, optical, electromagnetic, etc.). The unique properties of nanofibers give them enormous market potential in membrane materials, filter media, catalysts, electronic products, biopharmaceuticals, and composite reinforcement materials. In recent years, electrospinning technology has become an effective method for preparing nanofibers. Its principle involves first forming Taylor cones from charged polymer droplets under the influence of an electric field, then accelerating and stretching them to overcome surface tension and form jet streams. During the jetting process, the solvent evaporates or solidifies, forming nanofibers. Electrospun nanofibers, due to their small size, large specific surface area, and high porosity, are widely used in filter materials, battery membranes, tissue engineering, protective clothing, missiles, rockets, aircraft, and other military and civilian fields. With current technology, electrospinning is an emerging spinning technology suitable for the large-scale production of nanofibers and the preparation of various polymer nanofibers, possessing characteristics unmatched by other nanofiber preparation methods.

[0003] In practical applications, nanofibers need to be processed into materials of a certain macroscopic scale to facilitate further shaping and application. For example, when used in air filtration, water filtration, battery membranes, etc., nanofibers need to be prepared into membrane materials. However, when used in smart wearables, medical devices, functional textiles, etc., nanofibers often need to be prepared into macroscopic fibers. Therefore, how to make nanofibers into fibers or yarns that can be used in conventional textile manufacturing is a hot issue in nanofiber shaping and processing.

[0004] Currently, there are two main types of equipment for electrospinning yarn production. One type directly spins nanofibers prepared by electrospinning into yarn (pure nanofiber spinning). For example, Chinese patent CN201310101602.1 (Electrospinning Nanofiber Air-Jet Spinning Machine and Usage Method) combines electrospinning technology with air-jet spinning. The nanofiber web ejected from the spinning unit is oriented, aggregated, and twisted to finally form nanofiber yarn. CN201910434718.4 (Continuous Oriented Nanofiber Yarn Electrospinning Device and Usage Method) uses a spinning nozzle to drive a rotating fiber collecting and twisting device to wind up the spinning solution and obtain continuously oriented nanofiber yarn. This type of method can aggregate and twist the electrospinned nanofibers to form nanofiber yarn. However, the structure of the spinning nozzle is relatively simple, making it difficult to adjust the spinning nozzle according to the characteristics of the spinning solution. Secondly, the basic morphology of the receiving device is fixed, making it difficult to change the electric field distribution through the morphology of the receiving device.

[0005] Another type involves combining conventional textile fibers or yarns with electrospun nanofibers to prepare blended yarns (nanofiber blended yarns). For example, Chinese patent CN201310586642.X (a method for preparing nanofiber blended composite yarns) combines electrospun nanofibers with the cotton web that is about to be formed into slivers during the carding process to obtain nanofiber blended composite yarns. Chinese patent CN201810429569.8 (processing device and yarn preparation method for multi-strand nanofiber composite yarns) uses the setting of electrospinning nozzles and nanofiber receiving baths to allow several yarns to pass through the surface of the receiving bath. Under the action of the twister, a layer of nanofiber film is rolled onto the surface of the yarn. These devices usually set the electrospinning nozzles on one side of the conventional yarn or cotton web, which often results in an off-center structure in the blended yarn, which is not conducive to the subsequent processing and application of the blended yarn.

[0006] Therefore, it is necessary to design a dedicated electrospinning device that meets the needs of large-scale production, and simultaneously realize the pure spinning of nanofibers into yarn and the blending of nanofibers into yarn. Secondly, in order to meet the diverse requirements of nanofiber preparation for materials, fiber structure and fiber distribution, the electrospinning device should have the function of adjusting the distribution of the electrospinning electric field. Summary of the Invention

[0007] The purpose of this invention is to provide an electrospinning device for preparing nanofiber yarns and blended yarns, so as to solve the technical problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an electrospinning device for preparing nanofiber yarns and blended yarns, comprising a liquid supply assembly, a wire assembly, a high-voltage generator and a spinning head assembly, an annular guide rail, a collection assembly, a control system and a yarn bobbin. The liquid supply assembly is used to store and ensure a continuous and stable supply of spinning solution to the spinning head assembly during the spinning process. The liquid supply assembly adopts a dynamic liquid supply method and is used to rotate together with the spinning head assembly. The wire assembly is used to guide and transmit electric field force. The spinning head assembly is guided and transmitted by the electric field force during the process of converting the spinning solution into fibers, forming nanofibers. The high-voltage generator is used to generate the required high-voltage electric field. The annular guide rail provides a fixed track. The collection assembly is used to collect and organize the nanofibers ejected from the spinning head assembly. The control system is used to control various parameters during the electrospinning process.

[0009] The wire assembly includes a wire disc, a bearing is installed on the outer wall of the wire disc, a collector is installed at the bottom of the outer wall of the bearing, and the collector is grounded. When the wire assembly is working, the wire disc is stationary, and the collector moves at a certain speed. The wire disc is made of non-conductive material, and several wire holes are opened on the top of the wire disc. The wire disc is used to guide the blended yarn or fiber through the wire holes to the bottom and to combine it with the electrospun nanofiber.

[0010] The collector is made of conductive material and, when rotated, forms a trumpet or cone shape that is narrower at the top and wider at the bottom. The collector includes 6 evenly distributed collecting rods, each of which consists of 7 freely rotating short rods. The shape of the collecting rods can be adjusted in three-dimensional space by adjusting the three-dimensional angle between the short rods. At the same time, the shape of each collecting rod must be consistent to ensure stability during high-speed rotation.

[0011] Preferably, the liquid supply assembly includes a liquid supply tank, an inlet pipe is installed on one side of the top of the liquid supply tank, an outlet pipe is installed at the bottom of the outer wall of the liquid supply tank, a flow control valve is installed on the outer wall of the outlet pipe, and the other end of the outlet pipe is connected to the outer wall of the spinning head assembly.

[0012] Preferably, the spinning head assembly includes a circular base, with a plurality of spinnerets mounted on the top of the circular base. A pressure regulating mechanism is mounted on the outer wall of the spinnerets, which is used to change the pressure inside the channel of the spinnerets. A plurality of symmetrical metal curves are welded to the outer wall of the spinnerets via a fixing plate. A first transmission wheel is mounted in the middle of the bottom of the circular base. A transmission belt is movably connected to the outer wall of the first transmission wheel. A second transmission wheel is mounted at the other end of the inner wall of the transmission belt. A drive motor is mounted on the top of the second transmission wheel, and a first electric telescopic cylinder is mounted on the top of the drive motor.

[0013] Preferably, the high-voltage end of the high-voltage generator is electrically connected to the spinning head assembly to supply high voltage. The annular guide rail includes a guide groove, and the inner wall of the guide groove is provided with a plurality of sliding grooves. A slider is installed on the inner wall of the sliding groove. A second bearing is installed at one end of the slider, and the inner ring of the second bearing is installed on the outer wall of the circular base. A second electric telescopic cylinder is installed at the bottom of the second bearing, and the second electric telescopic cylinder is installed on the outer side of the bottom of the annular guide rail.

[0014] Preferably, the collecting assembly includes a yarn-drawing head, a twister, a roller, and a collecting roller. The yarn-drawing head is used to draw the nanofiber conical aggregates to a designated position. The twister is a device for twisting the yarn. The roller is used for feeding, drawing, and outputting, helping the yarn to be smoothly transported in the machine. The collecting roller is used to collect the processed yarn.

[0015] Preferably, the control system includes a controller for adjusting the collector to rotate around the center line of the annular guide rail at a speed of 100 rpm to 5000 rpm, and the controller for driving the drive motor to rotate the spinning head assembly axially along the annular guide rail at a speed of 10 rpm to 200 rpm.

[0016] Preferably, the yarn-drawing head is composed of a non-conductive polytetrafluoroethylene handheld end and a conductive metal tip.

[0017] Preferably, the electrospinning device for preparing nanofiber yarns and blended yarns is used in a needleless electrospinning method to simultaneously achieve pure nanofiber spinning and nanofiber blended spinning.

[0018] Preferably, the electrospinning process for preparing nanofiber yarns and blended yarns using this electrospinning device to achieve pure spinning of nanofiber yarns is as follows:

[0019] S1. Place the spinning solution into the supply tank, drive the collector to rotate around the center line of the annular guide rail using the controller, with a speed of 100rpm-5000rpm, then turn on the drive motor to make the spinning head assembly rotate axially along the annular guide rail, with a speed of 10rpm-200rpm, and the rotation direction of the collector is opposite to the rotation direction of the spinning head assembly.

[0020] S2. Start the high voltage generator. The high voltage end is connected to the spinning head assembly through a conductive connection. The drive motor can drive the spinning head assembly to rotate. At the same time, the controller can adjust the movement of the first electric telescopic cylinder and the second electric telescopic cylinder, thereby driving the spinning head assembly and the drive motor to move downward. When it reaches the bottom of the annular guide rail, the spinneret will carry a small amount of spinning liquid. As the spinneret continues to rotate, the spinning liquid is subjected to the electric field between the spinneret and the collector, forming multiple fine streams of spinning liquid.

[0021] S3. The spinning solution stream further forms visible nanofiber cone-shaped aggregates under the action of the collector rotation. The metal end of the yarn drawing head is placed at the center line of the annular guide rail, slightly higher than the plane of the annular guide rail. After the nanofibers are aggregated at the metal end, the yarn drawing head is drawn downwards and, through the twister, the formed nanofiber bundle is collected into a roll on the collecting roller by the orientation and drawing effect of the roller.

[0022] S4. Finally, pure nanofiber yarn is obtained by directly twisting electrospun nanofibers.

[0023] Preferably, the electrospinning device for preparing nanofiber yarns and blended yarns follows these steps for achieving nanofiber blending into yarn:

[0024] S1. Place the spinning solution into the supply tank, drive the collector to rotate around the center line of the annular guide rail using the controller, with a speed of 100rpm-5000rpm, then turn on the drive motor to make the spinning head assembly rotate axially along the annular guide rail, with a speed of 10rpm-200rpm, and the rotation direction of the collector is opposite to the rotation direction of the spinning head assembly.

[0025] S2. The fibers are introduced from the yarn bobbin and guided to the yarn collection hole below through the guide wire hole on the guide wire disc. The yarn collection hole is located below the guide wire disc. The combined yarn is collected on the collecting roller by the orientation and stretching effect of the twister and the roller.

[0026] S3. Start the high-voltage generator. The high-voltage end is connected to the spinning head assembly via a conductive connection, enabling the drive motor to rotate the spinning head assembly. At the same time, the controller can adjust the movement of the first and second electric telescopic cylinders, thereby moving the spinning head assembly and the drive motor downwards. When it reaches the bottom of the annular guide rail, the spinneret will carry a small amount of spinning solution. As the spinneret continues to rotate, the spinning solution is subjected to the electric field between the spinneret and the collector, forming multiple fine streams of spinning solution:

[0027] S4. The spinning solution stream further forms visible nanofiber cone-shaped aggregates under the action of the collector rotation, and adheres to the outer wall of the above-mentioned combined yarn. It is further passed through the twister, so that the formed composite yarn is collected and rolled on the collecting roller by the orientation stretching effect of the roller, and finally obtains the nanofiber blended yarn formed by combining conventional textile fibers or yarns with electrospun nanofibers.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. This invention, through the arrangement of a collector, a collecting rod, and a short rod, enables the collecting rod to be arranged into various specific shapes, forming a cone or trumpet shape that is narrow at the top and wide at the bottom when rotated. This allows for adjustment and variation of the electric field distribution formed between the collector and the spinneret at the high-voltage end after the collector is grounded. This achieves the function of adjusting the electric field distribution of electrospinning, thereby enabling precise control of the fiber morphology and structure, resulting in more uniform and delicate fibers with better performance. This is beneficial for improving the effect of electrospinning in preparing nanofiber yarns and blended yarns.

[0030] 2. This invention adjusts the pressure regulating mechanism through the control system, which can change the pressure inside the spinneret channel and thus regulate the spinneret. By using curves with multiple symmetrical directions, it can guide the fiber flow and ensure that the fiber remains uniform and stable during the spraying process.

[0031] 3. By employing needleless electrospinning, this invention can simultaneously achieve both pure nanofiber spinning and blended nanofiber spinning to meet the needs of large-scale production, thereby improving the practicality of this electrospinner.

[0032] 4. This invention activates a high-voltage generator, which connects the high-voltage end to the spinning head assembly via a conductive connection. The drive motor, through the arrangement of the second transmission wheel, transmission belt, and first transmission wheel, drives the spinning head assembly to rotate. When the spinning head assembly moves to the bottom of the annular guide rail, the spinneret carries a small amount of spinning solution. As the spinneret continues to rotate, the spinning solution is subjected to the electric field between the spinneret and the collector, forming multiple fine streams of spinning solution. Therefore, by setting the position of the spinning head assembly, an off-center structure can be avoided, which is beneficial to improving the subsequent processing and application of blended yarns. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the funnel-shaped and cone-shaped structure of the collector of the present invention, which is narrow at the top and wide at the bottom.

[0035] Figure 3 This is a schematic diagram of the spinneret structure of the present invention;

[0036] Figure 4 This is a schematic diagram of the annular guide rail structure of the present invention;

[0037] Figure 5 This is a schematic diagram of the control system structure of the present invention;

[0038] Figure 6 This is a schematic diagram of the pure spinning process of nanofibers in this invention.

[0039] Figure 7 This is a schematic diagram of the working steps of the nanofiber blending yarn production of the present invention.

[0040] In the diagram: 1. Wire guide reel; 2. Collector; 3. Wire guide hole; 4. Collecting rod; 5. Short rod; 6. Liquid supply tank; 7. Inlet pipe; 8. Outlet pipe; 9. Flow control valve; 10. Circular base; 11. Spinneret; 12. First drive wheel; 13. Bearing; 14. Drive belt; 15. Second drive wheel; 16. Drive motor; 18. Twisting device; 19. Roller; 20. Collecting roller; 21. Controller; 22. High-pressure generator; 23. First electric telescopic cylinder; 24. Guide groove; 25. Slide groove; 26. Slider; 27. Second bearing; 28. Second electric telescopic cylinder. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, 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 invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Example 1: Please refer to Figure 1 and Figure 2 An embodiment of the present invention includes a liquid supply assembly, a wire assembly, a high-voltage generator 22, a spinning head assembly, an annular guide rail, a collection assembly, a control system, and a yarn bobbin. The liquid supply assembly stores and ensures a continuous and stable supply of spinning solution to the spinning head assembly during the spinning process. The liquid supply assembly adopts a dynamic liquid supply method and rotates together with the spinning head assembly. The wire assembly guides and transmits electric field force. The spinning head assembly is guided and transmitted by the electric field force during the process of converting the spinning solution into fibers, forming nanofibers. The high-voltage generator 22 generates the required high-voltage electric field. The annular guide rail provides a fixed track. The collection assembly collects and organizes the nanofibers ejected from the spinning head assembly. The control system controls various parameters during the electrospinning process.

[0045] The wire assembly includes a wire disk 1, a first bearing 13 is installed on the outer wall of the wire disk 1, a collector 2 is installed at the bottom of the outer wall of the first bearing 13 and the collector 2 is grounded. When the wire assembly is working, the wire disk 1 is stationary and the collector 2 moves at a certain speed. The wire disk 1 is made of non-conductive material. Several wire holes 3 are opened on the top of the wire disk 1. The wire disk 1 is used to guide the blended yarn or fiber through the wire holes 3 to the bottom and to combine it with the electrospun nanofiber.

[0046] Collector 2 is made of conductive material and forms a trumpet or cone shape that is narrow at the top and wide at the bottom when rotating. Collector 2 includes 6 evenly distributed collecting rods 4. Each collecting rod 4 is composed of 7 freely rotating short rods 5. The shape of the collecting rod 4 can be adjusted in three-dimensional space by adjusting the three-dimensional angle between the short rods 5. At the same time, the shape of each collecting rod 4 must be consistent to ensure stability during high-speed rotation.

[0047] Furthermore, by setting up the collector 2, the collecting rod 4 and the short rod 5, the collecting rod 4 can be arranged into various specific shapes, thereby adjusting the electric field distribution formed with the high-voltage end spinneret 11 after the collector 2 is grounded, thus realizing the function of adjusting the electric field distribution of electrospinning.

[0048] Example 2: Please refer to Figure 3 An embodiment of the present invention provides: the liquid supply assembly includes a liquid supply tank 6, an inlet pipe 7 is installed on one side of the top of the liquid supply tank 6, an outlet pipe 8 is installed at the bottom of the outer wall of the liquid supply tank 6, and a flow control valve 9 is installed on the outer wall of the outlet pipe 8.

[0049] The spinning head assembly includes a circular base 10, a plurality of spinnerets 11 are mounted on the top of the circular base 10, a pressure regulating mechanism is mounted on the outer wall of the spinneret 11, the pressure regulating mechanism is used to change the pressure in the internal channel of the spinneret 11, a plurality of symmetrical metal curves are welded on the outer wall of the spinneret 11 through a fixing plate, a first transmission wheel 12 is mounted in the middle of the bottom of the circular base 10, a transmission belt 14 is movably connected to the outer wall of the first transmission wheel 12, a second transmission wheel 15 is mounted on the other end of the inner wall of the transmission belt 14, a drive motor 16 is mounted on the top of the second transmission wheel 15, and a first electric telescopic cylinder 23 is mounted on the top of the drive motor 16.

[0050] The high voltage end of the high voltage generator 22 is electrically connected to the spinning head assembly to connect to high voltage. The annular guide rail includes a guide groove 24. The inner wall of the guide groove 24 is provided with a number of sliding grooves 25. A slider 26 is installed on the inner wall of the sliding groove 25. A second bearing 27 is installed at one end of the slider 26. The inner ring of the second bearing 27 is installed on the outer wall of the circular base 10. A second electric telescopic cylinder 28 is installed at the bottom of the second bearing 27. The second electric telescopic cylinder 28 is installed on the outer side of the bottom of the annular guide rail.

[0051] Furthermore, by adjusting the pressure regulating mechanism through the control system, the pressure inside the spinneret 11 can be changed, thereby regulating the spinneret 11. By using curves with multiple symmetrical directions, the flow of fibers can be guided, ensuring that the fibers remain uniform and stable during the spraying process.

[0052] Example 3: Please refer to Figure 1 , Figure 2 and Figure 4 An embodiment of the present invention provides: the liquid supply assembly includes a liquid supply tank 6, an inlet pipe 7 is installed on one side of the top of the liquid supply tank 6, an outlet pipe 8 is installed at the bottom of the outer wall of the liquid supply tank 6, and a flow control valve 9 is installed on the outer wall of the outlet pipe 8.

[0053] The spinning head assembly includes a circular base 10, with several spinnerets 11 mounted on the top of the circular base 10. A pressure regulating mechanism is mounted on the outer wall of each spinneret 11 to change the pressure inside the channel of the spinneret 11. Several symmetrical metal curves are welded to the outer wall of the spinneret 11 via a fixing plate. A first drive wheel 12 is mounted in the middle of the bottom of the circular base 10. A through hole 13 is opened on the top of the first drive wheel 12. A drive belt 14 is movably connected to the outer wall of the first drive wheel 12. A second drive wheel 15 is mounted on the other end of the inner wall of the drive belt 14. A drive motor 16 is mounted on the top of the second drive wheel 15.

[0054] The high voltage terminal of the high voltage generator 22 connects the spinning head assembly to a high voltage via a conductive connection.

[0055] Furthermore, by activating the high-voltage generator 22, the high-voltage end is connected to the spinning head assembly via a conductive connection, and the drive motor 16, through the arrangement of the second transmission wheel 15, the transmission belt 14 and the first transmission wheel 12, can drive the spinning head assembly to rotate. When the spinning head assembly moves to the bottom of the annular guide rail, the spinneret 11 will carry a small amount of spinning liquid. As the spinneret 11 continues to rotate, the spinning liquid is subjected to the electric field between the spinneret 11 and the collector 2, forming multiple fine streams of spinning liquid. Therefore, by setting the position of the spinning head assembly, the off-center structure can be avoided, which is beneficial to improving the subsequent processing and application of the blended yarn.

[0056] Example 4: Please refer to Figure 1 , Figure 2 and Figure 5 An embodiment of the present invention provides: the collecting component includes a yarn drawing head, a twister 18, a roller 19 and a collecting roller 20. The yarn drawing head is used to draw the nanofiber conical aggregate to a designated position. The twister 18 is a device for twisting the yarn. The roller 19 is used to feed, draw and output the yarn to help it be smoothly transported in the machine. The collecting roller 20 is used to collect the processed yarn.

[0057] The control system includes a controller 21, which is used to adjust the collector 2 to rotate around the center line of the annular guide rail at a speed of 100 rpm to 5000 rpm. The controller 21 is also used to drive the drive motor 16 to rotate the spinning head assembly along the axial direction of the annular guide rail at a speed of 10 rpm to 200 rpm.

[0058] The yarn-drawing head is composed of a non-conductive polytetrafluoroethylene hand-held end and a conductive metal tip.

[0059] Furthermore, by employing a control system to precisely regulate the rotational speed of the controller 21 and the spinning head assembly, and by using the yarn drawing head, twister 18, roller 19 and collecting roller 20, the efficiency of the blended yarn can be improved.

[0060] Example 5: Please refer to Figure 6 and Figure 7 One embodiment of the present invention is that the electrospinning device for preparing nanofiber yarns and blended yarns is used by needleless electrospinning, which is used to simultaneously achieve pure nanofiber spinning into yarn and nanofiber blended yarn.

[0061] The electrospinning process for preparing nanofiber yarns and blended yarns using this method involves the following steps to achieve pure nanofiber spinning:

[0062] S1. Place the spinning solution into the supply tank 6. Drive the collector 2 to rotate around the center line of the annular guide rail using the controller 21. The rotation speed is 100rpm-5000rpm. Then turn on the drive motor 16 to make the spinning head assembly rotate axially along the annular guide rail. The rotation speed is 10rpm-200rpm. The rotation direction of the collector 2 is opposite to the rotation direction of the spinning head assembly.

[0063] S2. Start the high voltage generator 22. The high voltage end is connected to the spinning head assembly through a conductive connection. The drive motor 16 can drive the spinning head assembly to rotate. At the same time, the controller 21 can adjust the movement of the first electric telescopic cylinder 23 and the second electric telescopic cylinder 28, thereby driving the spinning head assembly and the drive motor 16 to move downward. When it reaches the bottom of the annular guide rail, the spinneret 11 will carry a small amount of spinning liquid. As the spinneret 11 continues to rotate, the spinning liquid is subjected to the electric field between the spinneret 11 and the collector 2, forming multiple fine streams of spinning liquid.

[0064] S3. The spinning solution stream further forms visible nanofiber cone-shaped aggregates under the action of collector 2 rotation. The metal end of the yarn drawing head is placed at the center line of the annular guide rail and slightly higher than the plane of the annular guide rail. After the nanofibers are aggregated at the metal end, the yarn drawing head is drawn downwards and through twister 18, the formed nanofiber bundle is collected into a roll on collecting roller 20 by the orientation drawing effect of roller 19.

[0065] S4. Finally, pure nanofiber yarn is obtained by directly twisting electrospun nanofibers.

[0066] The electrospinning device for preparing nanofiber yarns and blended yarns follows these steps for achieving nanofiber blending into yarn:

[0067] S1. Place the spinning solution into the supply tank 6. Drive the collector 2 to rotate around the center line of the annular guide rail using the controller 21. The rotation speed is 100rpm-5000rpm. Then turn on the drive motor 16 to make the spinning head assembly rotate axially along the annular guide rail. The rotation speed is 10rpm-200rpm. The rotation direction of the collector 2 is opposite to the rotation direction of the spinning head assembly.

[0068] S2. The fibers are introduced from the yarn bobbin and guided to the yarn collecting hole below through the guide hole 3 on the guide plate 1. The yarn collecting hole is located below the guide plate 1. The combined yarn is collected on the collecting roller 20 by the orientation and stretching effect of the twister 18 and the roller 19.

[0069] S3. Start the high-voltage generator 22. The high-voltage end is connected to the spinning head assembly through a conductive connection, and the drive motor 16 can drive the spinning head assembly to rotate. At the same time, the controller 21 can adjust the movement of the first electric telescopic cylinder 23 and the second electric telescopic cylinder 28, thereby driving the spinning head assembly and the drive motor 16 to move downward. When it reaches the bottom of the annular guide rail, the spinneret 11 will carry a small amount of spinning solution. As the spinneret 11 continues to rotate, the spinning solution is subjected to the electric field between the spinneret 11 and the collector 2, forming multiple fine streams of spinning solution:

[0070] S4. The spinning solution stream further forms visible nanofiber cone-shaped aggregates under the action of collector 2 rotation, and adheres to the outer wall of the above-mentioned combined yarn. It is further passed through twister 18, so that the formed composite yarn is subjected to the orientation stretching effect of roller 19 and collected into a roll on collecting roller 20, finally obtaining nanofiber blended yarn formed by combining conventional textile fibers or yarns with electrospun nanofibers.

[0071] Furthermore, by adopting needle-free electrospinning, it is possible to simultaneously achieve pure nanofiber spinning and nanofiber blending while meeting the needs of large-scale production, which is beneficial to improving the practicality of this electrospinner.

[0072] The working principle is as follows: By arranging the collector 2, collecting rod 4, and short rod 5, the collecting rod 4 can be configured into various specific shapes. This allows for adjustment of the electric field distribution formed between the collector 2 (grounded) and the high-voltage spinneret 11, thus achieving the function of regulating the electrostatic spinning electric field distribution. The control system adjusts the pressure regulating mechanism, changing the pressure within the internal channel of the spinneret 11, thereby regulating the spinneret 11. Using curves with multiple symmetrical directions guides fiber flow, ensuring uniformity and stability during the spinning process. Activating the high-voltage generator 22 connects the high-voltage end to the spinning head assembly via a conductive connection. The drive motor 16, through the arrangement of the second transmission wheel 15, transmission belt 14, and first transmission wheel 12, drives the spinning head assembly. As the spinning head assembly rotates, when it moves to the bottom of the annular guide rail, the spinneret 11 carries a small amount of spinning solution. As the spinneret 11 continues to rotate, the spinning solution is subjected to the electric field between the spinneret 11 and the collector 2, forming multiple fine streams of spinning solution. Therefore, by setting the position of the spinning head assembly, an off-center structure can be avoided, which is beneficial to improving the subsequent processing and application of the blended yarn. By using a control system to precisely regulate the speed of the controller 21 and the spinning head assembly, and by using the yarn drawing head, twister 18, roller 19 and collecting roller 20, the efficiency of the blended yarn can be improved. By adopting needle-free electrospinning, it is possible to meet the needs of large-scale production while simultaneously achieving pure nanofiber spinning and nanofiber blending, which is beneficial to improving the practicality of this electrospinner.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An electrospinning device for preparing nanofiber yarns and blended yarns, comprising a liquid supply assembly, a wire assembly, a high-voltage generator (22), a spinning head assembly, an annular guide rail, a collection assembly, a control system, and a yarn bobbin, characterized in that: The liquid supply component is used to store and ensure that the spinning solution is continuously and stably supplied to the spinning head component during the spinning process. The liquid supply component adopts a dynamic liquid supply method and is used to rotate together with the spinning head component. The wire component is used to guide and transmit electric field force. The spinning head component forms nanofibers under the guidance and transmission of electric field force by the wire component during the process of converting the spinning solution into fibers. The high voltage generator (22) is used to generate the required high voltage electric field. The annular guide rail is used to provide a fixed track. The collection component is used to collect and sort the nanofibers sprayed out by the spinning head component. The control system is used to control various parameters in the electrospinning process. The wire assembly includes a wire disk (1), a first bearing (13) is installed on the outer wall of the wire disk (1), a collector (2) is installed at the bottom of the outer wall of the first bearing (13), and the collector (2) is grounded. When the wire assembly is working, the wire disk (1) is stationary, and the collector (2) moves at a certain speed. The wire disk (1) is made of non-conductive material. Several wire holes (3) are opened on the top of the wire disk (1). The wire disk (1) is used to guide the blended yarn or fiber through the wire holes (3) to the bottom and combine it with the electrospun nanofiber. The collector (2) is made of conductive material and forms a trumpet or cone shape that is narrow at the top and wide at the bottom when rotated. The collector (2) includes 6 evenly distributed collecting rods (4). The collecting rods (4) are composed of 7 freely rotating short rods (5). The shape of the collecting rods (4) can be adjusted in three-dimensional space by adjusting the three-dimensional angle between the short rods (5). At the same time, the shape of each collecting rod (4) must be consistent to ensure stability during high-speed rotation.

2. The electrospinning device for preparing nanofiber yarns and blended yarns according to claim 1, characterized in that: The liquid supply assembly includes a liquid supply tank (6), an inlet pipe (7) is installed on one side of the top of the liquid supply tank (6), an outlet pipe (8) is installed at the bottom of the outer wall of the liquid supply tank (6), a flow control valve (9) is installed on the outer wall of the outlet pipe (8), and the other end of the outlet pipe (8) is connected to the outer wall of the spinning head assembly.

3. The electrospinning apparatus for preparing nanofiber yarns and blended yarns according to claim 2, characterized in that: The spinning head assembly includes a circular base (10), a plurality of spinnerets (11) are mounted on the top of the circular base (10), a pressure regulating mechanism is mounted on the outer wall of the spinneret (11), the pressure regulating mechanism is used to change the pressure in the internal channel of the spinneret (11), a plurality of symmetrical metal curves are welded on the outer wall of the spinneret (11) through a fixing plate, a first transmission wheel (12) is mounted in the middle of the bottom of the circular base (10), a transmission belt (14) is movably connected to the outer wall of the first transmission wheel (12), a second transmission wheel (15) is mounted on the other end of the inner wall of the transmission belt (14), a drive motor (16) is mounted on the top of the second transmission wheel (15), and a first electric telescopic cylinder (23) is mounted on the top of the drive motor (16).

4. The electrospinning apparatus for preparing nanofiber yarns and blended yarns according to claim 3, characterized in that: The high voltage end of the high voltage generator (22) is connected to the spinning head assembly through a conductive connection. The annular guide rail includes a guide groove (24). The inner wall of the guide groove (24) is provided with several sliding grooves (25). A slider (26) is installed on the inner wall of the sliding groove (25). A second bearing (27) is installed at one end of the slider (26). The inner ring of the second bearing (27) is installed on the outer wall of the circular base (10). A second electric telescopic cylinder (28) is installed at the bottom of the second bearing (27). The second electric telescopic cylinder (28) is installed on the outer side of the bottom of the annular guide rail.

5. The electrospinning apparatus for preparing nanofiber yarns and blended yarns according to claim 4, characterized in that: The collection assembly includes a yarn-drawing head, a twister (18), a roller (19), and a collection roller (20). The yarn-drawing head is used to draw the nanofiber conical aggregates to a designated position. The twister (18) is a device for twisting the yarn. The roller (19) is used for feeding, drawing, and outputting, helping the yarn to be smoothly transported in the machine. The collection roller (20) is used to collect the processed yarn.

6. The electrospinning apparatus for preparing nanofiber yarns and blended yarns according to claim 5, characterized in that: The control system includes a controller (21), which is used to adjust the collector (2) to rotate around the center line of the annular guide rail at a speed of 100 rpm to 5000 rpm. The controller (21) is also used to drive the drive motor (16) to rotate the spinning head assembly along the axial direction of the annular guide rail at a speed of 10 rpm to 200 rpm.

7. The electrospinning apparatus for preparing nanofiber yarns and blended yarns according to claim 5, characterized in that: The yarn-drawing head is composed of a non-conductive polytetrafluoroethylene handheld end and a conductive metal tip.

8. The method of using the electrospinning device for preparing nanofiber yarns and blended yarns according to claim 6, characterized in that, The electrospinning device for preparing nanofiber yarns and blended yarns uses a needleless electrospinning method to simultaneously achieve pure nanofiber spinning and nanofiber blending into yarn.

9. The method of using the electrospinning device for preparing nanofiber yarns and blended yarns according to claim 8, characterized in that, The electrospinning process for preparing nanofiber yarns and blended yarns using this method involves the following steps to achieve pure nanofiber spinning: S1. Place the spinning solution into the supply tank (6), drive the collector (2) to rotate around the center line of the annular guide rail by the controller (21) at a speed of 100rpm-5000rpm, and then turn on the drive motor (16) to make the spinning head assembly rotate axially along the annular guide rail at a speed of 10rpm-200rpm, and the rotation direction of the collector (2) is opposite to the rotation direction of the spinning head assembly. S2. Start the high voltage generator (22). The high voltage end is connected to the spinning head assembly through the conductive connection. The drive motor (16) can drive the spinning head assembly to rotate. At the same time, the controller (21) can adjust the movement of the first electric telescopic cylinder (23) and the second electric telescopic cylinder (28), thereby driving the spinning head assembly and the drive motor (16) to move downward. When it reaches the bottom of the annular guide rail, the spinneret (11) will carry a small amount of spinning liquid. As the spinneret (11) continues to rotate, the spinning liquid is subjected to the electric field between the spinneret (11) and the collector (2), forming multiple fine streams of spinning liquid. S3. The spinning solution further forms visible nanofiber cone aggregates under the action of the collector (2) rotation. The metal end of the yarn drawing head is placed at the center line of the annular guide rail and slightly higher than the plane of the annular guide rail. After the nanofibers are aggregated at the metal end, the yarn drawing head is drawn downwards and through the twister (18), the formed nanofiber bundle is collected into a roll on the collecting roller (20) through the orientation and stretching effect of the roller (19). S4. Finally, pure nanofiber yarn is obtained by directly twisting electrospun nanofibers.

10. The method of using the electrospinning device for preparing nanofiber yarns and blended yarns according to claim 8, characterized in that, The electrospinning device for preparing nanofiber yarns and blended yarns follows these steps for achieving nanofiber blending into yarn: S1. Place the spinning solution into the supply tank (6), drive the collector (2) through the controller (21) to rotate around the center line of the annular guide rail at a speed of 100 rpm to 5000 rpm, and then turn on the drive motor (16) to make the spinning head assembly rotate along the axial direction of the annular guide rail at a speed of 10 rpm to 200 rpm, and the rotation direction of the collector (2) is opposite to the rotation direction of the spinning head assembly. S2. The fiber is introduced from the yarn tube and guided to the lower yarn collection hole through the guide hole (3) on the guide plate (1). The yarn collection hole is located below the guide plate (1). The combined yarn is collected on the collecting roller (20) by the orientation stretching effect of the twister (18) and the roller (19). S3. Start the high voltage generator (22). The high voltage end is connected to the spinning head assembly through a conductive connection. The drive motor (16) can drive the spinning head assembly to rotate. At the same time, the controller (21) can adjust the movement of the first electric telescopic cylinder (23) and the second electric telescopic cylinder (28), thereby driving the spinning head assembly and the drive motor (16) to move downward. When it reaches the bottom of the annular guide rail, the spinneret (11) will carry a small amount of spinning liquid. As the spinneret (11) continues to rotate, the spinning liquid is subjected to the electric field between the spinneret (11) and the collector (2), forming multiple fine streams of spinning liquid: S4. The spinning solution further forms visible nanofiber cone aggregates under the action of the collector (2) rotation, and attaches to the outer wall of the merged yarn. Then, through the twister (18), the formed composite yarn is subjected to the orientation stretching effect of the roller (19) and collected into a roll on the collecting roller (20), finally obtaining the nanofiber blended yarn formed by combining conventional textile fibers or yarns with electrospun nanofibers.

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