Needle fixing and voltage loading device for multi-needle electrospinning nanofiber yarn

Abstract

The utility model discloses a kind of needle head fixing and voltage loading device for multi-needle electrostatic spinning nanofiber yarn, including cantilever platform, longitudinal lifting device, needle head fixing device and voltage loading device;Wherein needle head fixing device includes sequentially superimposed fixed insulating porous inner recessed plate, metal porous plate and insulating press plate;Metal porous plate is fixed in the porous recess on insulating porous inner recessed plate, and multiple groups of metal needle head are longitudinally inserted in the through hole on metal porous plate and porous recess;Voltage loading device includes main metal electrode column that is electrically connected with metal porous plate, auxiliary electrode insulating support frame that is suspendedly arranged below insulating porous inner recessed plate, annular flaky auxiliary metal electrode that is arranged on auxiliary electrode insulating support frame, and auxiliary metal electrode column that is electrically connected with annular flaky auxiliary metal electrode;Its advantage lies in that installation process is simple and convenient, spinning distance can be accurately adjusted, spinning needle head quantity can flexibly adapt demand, reduce operation complexity.

Description

Technical Field

[0001] This utility model belongs to the field of electrospinning technology, and in particular relates to a needle fixing and voltage loading device for multi-needle electrospinning nanofiber yarn. Background Technology

[0002] In recent years, nanofiber materials have shown broad application prospects in many fields due to their unique structure and excellent properties, and electrospinning technology has become one of the core methods for preparing nanofibers. Among them, needleless electrospinning technology is becoming increasingly mature in the field of large-scale preparation of nanofibers, but it is still difficult to match the needled electrospinning method in terms of the controllability of nanofibers and their aggregate structure. Therefore, the preparation of nanofiber yarns is mostly based on needled electrospinning equipment.

[0003] To increase the yield of nanofiber yarn produced by needle electrospinning, increasing the number of needles is the most common technical approach in the industry. However, when multiple needles are densely arranged in a limited space, the problem of electric field interference between the needles is significantly aggravated, making it difficult to achieve stable and continuous preparation of nanofiber yarn. This problem has become a key bottleneck restricting the development of multi-needle electrospinning technology.

[0004] Currently, reducing electric field interference between needles by adding auxiliary electrodes has become a research focus in this field. Related studies have produced multi-needle water bath electrospinning devices with auxiliary electrodes, which can achieve efficient aggregation of nanofibers, but still have significant shortcomings: the needle installation process is cumbersome, precise control of spinning distance and voltage loading is difficult, the overall operation is complex, and the device's aesthetics are poor; furthermore, these devices rely on solution dispensers for liquid supply, which cannot meet the requirements for the online preparation of polymer nanofiber composite yarns. Utility Model Content

[0005] The purpose of this invention is to provide a needle fixing and voltage loading device for multi-needle electrospinning of nanofiber yarn. The needle installation and fixing process is simple and convenient, the spinning distance can be precisely adjusted by the longitudinal lifting device, and the number of spinning needles can be flexibly adapted to the needs, which greatly reduces the operational complexity of multi-needle electrospinning.

[0006] The technical solution of this utility model is: a needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn, including a cantilever platform, a longitudinal lifting device for driving the cantilever platform to rise and fall vertically, a needle fixing device fixed to the outer end of the cantilever platform, and a voltage loading device disposed on the needle fixing device. The needle fixing device includes an insulating porous concave plate, a metal porous plate, and an insulating pressure plate stacked and fixed from bottom to top. The metal porous plate is fixed in the porous groove of the insulating porous concave plate, and multiple sets of metal needles are longitudinally inserted in the through holes on the metal porous plate and the porous groove. All sets of metal needles are electrically connected to the metal porous plate. The voltage loading device includes a main metal electrode column fixed to the top of the insulating porous concave plate and electrically connected to the metal porous plate, an auxiliary electrode insulating support frame suspended below the insulating porous concave plate, an annular sheet-shaped auxiliary metal electrode set on the auxiliary electrode insulating support frame and located on the lower periphery of the metal needle, and an auxiliary metal electrode column fixed to the top of the insulating porous concave plate and electrically connected to the annular sheet-shaped auxiliary metal electrode.

[0007] As a preferred technical solution, the auxiliary electrode insulating support frame includes a suspension frame disposed at the outer end of the insulating porous concave plate, a rotating nut disposed at the inner end of the insulating porous concave plate, and an annular auxiliary electrode bracket whose two ends are respectively fixedly connected to the suspension frame and the rotating nut and inlaid with the annular sheet-shaped auxiliary metal electrode. A metal sheet one is disposed inside the outer end of the annular auxiliary electrode bracket, and a metal sheet two is disposed inside the suspension frame. The annular sheet-shaped auxiliary metal electrode is conductively connected to the auxiliary metal electrode post in sequence through the metal sheet one and the metal sheet two.

[0008] As a preferred technical solution, a metal connecting strip integrally formed with the metal porous plate and used for conductive connection of the main metal electrode post is provided on one side of the metal porous plate, and the porous groove is a T-shaped porous groove that matches the shape of the metal connecting strip and the metal porous plate.

[0009] As a preferred technical solution, the tail end of each metal needle is equipped with a needle hose connector. A plurality of mounting holes arranged in a rectangular array are provided on the insulating pressure plate for fixing each needle hose connector. The mounting holes in the same column are interconnected and form an opening at one end of the insulating pressure plate. A locking strip is provided on the insulating pressure plate above the opening. At the same time, each needle hose connector is connected to a spinning solution supply pipeline with independent liquid supply.

[0010] As a preferred technical solution, the longitudinal lifting device includes a lifting column, a longitudinal threaded guide rail disposed inside the lifting column, a drive slider fitted on the longitudinal threaded guide rail, and a rotary disk disposed on the top of the lifting column for driving the longitudinal threaded guide rail to rotate; the inner end of the cantilever platform is fixedly connected to the drive slider.

[0011] As a preferred technical solution, a vertically set scale is provided on the outer wall of the lifting column, and its zero scale line is flush with the upper surface of the nanofiber receiving platform.

[0012] As a preferred technical solution, a limiting groove adapted to the outer walls on both sides of the lifting column is provided on the inner end of the cantilever platform. At the same time, two longitudinally arranged guide bars are provided on the inner side of the lifting column, and two guide grooves corresponding to the guide bars are provided on the drive slider.

[0013] As a preferred technical solution, the insulating porous concave plate, the metal porous plate, the insulating pressure plate, and the locking strip are connected by a number of fixing nuts.

[0014] As a preferred technical solution, the voltage loading device further includes a main high-voltage power supply connected to the main metal electrode post, and an auxiliary high-voltage power supply connected to the auxiliary metal electrode post.

[0015] As a preferred technical solution, the metal needles are arranged linearly, in a matrix, or in a ring, and the inner diameter of the ring-shaped auxiliary metal electrode is larger than the maximum outer diameter of the metal needle arrangement area.

[0016] The advantages of this utility model are: 1. The needle fixing and voltage loading device for multi-needle electrospinning nanofiber yarn of this utility model has a simple and convenient needle installation and fixing process, the spinning distance can be precisely adjusted by the longitudinal lifting device, and the number of spinning needles can be flexibly adapted to the needs, which greatly reduces the operation complexity of multi-needle electrospinning. 2. The needle fixing and voltage loading device for multi-needle electrospinning nanofiber yarn of this utility model allows each metal needle to be connected to an independent liquid supply pipeline, supporting the simultaneous use of different types of spinning solutions, meeting the online preparation requirements of multi-polymer nanofiber composite yarn, enriching the diversity of nanofiber aggregates, and having strong functional adaptability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram showing the combined state of the needle fixing device and the voltage loading device of this utility model; Figure 4 This is an internal schematic diagram of the longitudinal lifting device of this utility model; Figure 5 This is a schematic diagram of the structure of the insulating pressure plate of this utility model; Figure 6 This is a schematic diagram of the structure of the perforated metal plate of this utility model; Figure 7 This is a schematic diagram of the structure of the insulating porous concave plate of this utility model; The components include: 1. Cantilever platform, 2. Insulating porous concave plate, 3. Metal porous plate, 4. Insulating pressure plate, 5. Porous groove, 6. Through hole, 7. Metal needle, 8. Main metal electrode post, 9. Annular sheet-shaped auxiliary metal electrode, 10. Auxiliary metal electrode post, 11. Suspension bracket, 12. Rotary nut, 13. Annular auxiliary electrode bracket, 14. Metal connecting strip, 15. Needle hose connector, 16. Mounting hole, 17. Opening, 18. Locking pressure strip, 19. Lifting column, 20. Longitudinal threaded guide rail, 21. Drive slider, 22. Rotary disk, 23. Scale, 24. Limiting slot, 25. Guide bar, 26. Guide groove, 27. Fixing nut. Detailed Implementation

[0019] The above solution will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrating the present invention and are not intended to limit the scope of the present invention. The implementation conditions used in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0020] Example: Refer to Figures 1 to 3 , Figures 5 to 7As shown, a needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn includes a cantilever platform 1, a longitudinal lifting device for driving the cantilever platform 1 to rise and fall vertically, a needle fixing device fixed to the outer end of the cantilever platform 1, and a voltage loading device disposed on the needle fixing device. The needle fixing device includes an insulating porous concave plate 2, a metal porous plate 3, and an insulating pressure plate 4, which are stacked and fixed from bottom to top. The metal porous plate 3 is fixed within a porous groove 5 on the insulating porous concave plate 2, and multiple sets of metal needles 7 are longitudinally inserted into through holes 6 on the metal porous plate 3 and the porous groove 5. All sets of metal needles 7 are electrically connected to the metal porous plate 2. This novel needle fixing device uses a three-layer stacked structure (insulating porous concave plate 2, metal porous plate 3, and insulating pressure plate 4) for fixing. The installation process is simple, and the metal needles 7 can be fixed without complex debugging. Furthermore, it uses matching commercial metal needles, which are low in cost and easy to clean and reuse, ensuring the practical stability of the device while controlling production costs.

[0021] In this embodiment, the metal needles 7 can be arranged linearly, in a matrix, or in a ring to adapt to different nanofiber aggregate structure requirements, as shown in the reference. Figure 4 As shown, in this embodiment, the metal needles 7 are arranged in a 3*6 matrix, and the inner diameter of the annular sheet-shaped auxiliary metal electrode 9 is larger than the maximum outer diameter of the area where the metal needles 7 are arranged; this ensures that the electric field uniformly covers all the metal needles 7 and reduces interference.

[0022] Reference Figure 3 , Figure 6 , Figure 7 As shown, in this embodiment, a metal connecting strip 14 is integrally formed with the metal porous plate 3 and is used for conductive connection to the main metal electrode post 8. Meanwhile, the porous groove 5 is a T-shaped porous groove that matches the shape of the metal connecting strip 14 and the metal porous plate 3, which facilitates rapid assembly.

[0023] Reference Figure 3 , Figure 5 As shown, in this embodiment, each metal needle 7 is equipped with a needle hose connector 15 at its tail end. The insulating pressure plate 4 has mounting holes 16 arranged in a 3*6 rectangular array to fix each needle hose connector 15. The mounting holes 16 in the same column are interconnected and form an opening 17 at one end of the insulating pressure plate 4. A locking strip 18 is provided on the insulating pressure plate 4 above the opening 17. Each needle hose connector 15 is connected to an independently supplied spinning solution pipeline. Each metal needle 7 is connected to an independently supplied spinning solution pipeline via the needle hose connector 15, supporting the simultaneous use of different types of spinning solutions. This allows for free switching between different needle solution types and meets the online preparation requirements of multi-polymer nanofiber composite yarns, enriching the diversity of nanofiber aggregates.

[0024] Reference Figure 1 and Figure 3 As shown, in this embodiment, the voltage loading device includes a main metal electrode post 8 fixed to the top of the insulating porous concave plate 2 and electrically connected to the metal porous plate 3; an auxiliary electrode insulating support frame suspended below the insulating porous concave plate 2; an annular sheet-shaped auxiliary metal electrode 9 disposed on the auxiliary electrode insulating support frame and located on the lower periphery of the metal needle 7; and an auxiliary metal electrode post 10 fixed to the top of the insulating porous concave plate 2 and electrically connected to the annular sheet-shaped auxiliary metal electrode 9. The voltage loading device also includes a main high-voltage power supply connected to the main metal electrode post 8 and an auxiliary high-voltage power supply connected to the auxiliary metal electrode post 10. The main metal electrode post 8 and the auxiliary metal electrode post 10 are independently electrically connected, achieving precise voltage loading, reducing electric field interference between the metal needles 7, and improving the stability of the prepared nanofiber yarn.

[0025] Reference Figure 3 As shown, in this embodiment, the auxiliary electrode insulating support frame includes a suspension frame 11 disposed on the outer end of the insulating porous concave plate 2, a rotating nut 12 disposed on the inner end of the insulating porous concave plate 2, and an annular auxiliary electrode bracket 13 with its two ends fixedly connected to the suspension frame 11 and the rotating nut 12 respectively and having an annular sheet-shaped auxiliary metal electrode 9 embedded therein. A metal sheet one is disposed inside the outer end of the annular auxiliary electrode bracket 13, and a metal sheet two is disposed inside the suspension frame 11. The annular sheet-shaped auxiliary metal electrode 9 is electrically connected to the auxiliary metal electrode post 10 in sequence through the metal sheet one and the metal sheet two. The auxiliary electrode insulating support frame cooperates with the annular auxiliary electrode bracket 13 through the suspension frame 11, the rotating nut 12, and the suspension frame 11, allowing for flexible adjustment of the height of the annular sheet-shaped auxiliary metal electrode 9.

[0026] Reference Figure 1 , Figure 2 , Figure 4 As shown, in this embodiment, the longitudinal lifting device includes a lifting column 19, a longitudinal threaded guide rail 20 disposed inside the lifting column 19, a drive slider 21 fitted on the longitudinal threaded guide rail 20, and a rotary disk 22 disposed on the top of the lifting column 19 and used to drive the longitudinal threaded guide rail 20 to rotate; the inner end of the cantilever platform 1 is fixedly connected to the drive slider 21; a limiting slot 24 adapted to the outer walls on both sides of the lifting column 1 is provided on the inner end of the cantilever platform 1, and two longitudinally arranged guide bars 25 are provided on the inner side of the lifting column 1, and two guide grooves 26 corresponding to the guide bars 25 are provided on the drive slider 21; the longitudinal threaded guide rail 20 is driven to rotate by the rotary disk 22 to achieve stable height adjustment of the cantilever platform 1 and further precise control of the spinning distance; at the same time, the cooperative design of the limiting slot 24 with the guide bars 25 and guide grooves 26 ensures that the cantilever platform 1 does not deviate left or right during the lifting process, thus improving the spinning control accuracy.

[0027] Reference Figure 2 As shown, in this embodiment, a vertically set scale 23 is provided on the outer wall of the lifting column 19, and its zero scale line is flush with the upper surface of the nanofiber receiving platform; the scale accuracy of the scale 23 is not less than 1mm, and the zero scale line is flush with the receiving platform, so as to realize the visual and precise adjustment of the spinning distance.

[0028] Reference Figure 3 As shown, in this embodiment, the insulating porous concave plate 2, the metal porous plate 3, the insulating pressure plate 4, and the locking strip 18 are connected by four fixing nuts 27. Two fixing nuts 27 are used to fix the insulating porous concave plate 2, the metal porous plate 3, and the insulating pressure plate 4, and the other two fixing nuts 27 are used to fix the insulating porous concave plate 2, the metal porous plate 3, the insulating pressure plate 4, and the locking strip 18. The fixing nuts 27 can quickly assemble the three-layer stacked structure of the insulating porous concave plate 2, the metal porous plate 3, and the insulating pressure plate 4, and can also quickly fix the needle hose connector 15 with the cooperation of the locking strip 18. At the same time, it is easy to disassemble and facilitates later cleaning and maintenance.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn, characterized in that, It includes a cantilever platform, a longitudinal lifting device for driving the cantilever platform to rise and fall vertically, a needle fixing device fixed to the outer end of the cantilever platform, and a voltage loading device disposed on the needle fixing device. The needle fixing device includes an insulating porous concave plate, a metal porous plate, and an insulating pressure plate stacked and fixed from bottom to top. The metal porous plate is fixed in the porous groove of the insulating porous concave plate, and multiple sets of metal needles are longitudinally inserted in the through holes on the metal porous plate and the porous groove. All sets of metal needles are electrically connected to the metal porous plate. The voltage loading device includes a main metal electrode column fixed to the top of the insulating porous concave plate and electrically connected to the metal porous plate, an auxiliary electrode insulating support frame suspended below the insulating porous concave plate, an annular sheet-shaped auxiliary metal electrode set on the auxiliary electrode insulating support frame and located on the lower periphery of the metal needle, and an auxiliary metal electrode column fixed to the top of the insulating porous concave plate and electrically connected to the annular sheet-shaped auxiliary metal electrode.

2. The needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn according to claim 1, characterized in that, The auxiliary electrode insulating support frame includes a suspension frame disposed at the outer end of the insulating porous concave plate, a rotating nut disposed at the inner end of the insulating porous concave plate, and an annular auxiliary electrode bracket whose two ends are respectively fixedly connected to the suspension frame and the rotating nut and in which the annular sheet-shaped auxiliary metal electrode is embedded. A metal sheet one is disposed inside the outer end of the annular auxiliary electrode bracket, and a metal sheet two is disposed inside the suspension frame. The annular sheet-shaped auxiliary metal electrode is electrically connected to the auxiliary metal electrode post in sequence through the metal sheet one and the metal sheet two.

3. The needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn according to claim 1, characterized in that, A metal connecting strip, integrally formed with the metal porous plate and used for conductive connection to the main metal electrode post, is provided on one side of the metal porous plate. Meanwhile, the porous groove is a T-shaped porous groove that matches the shape of the metal connecting strip and the metal porous plate.

4. The needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn according to claim 1, characterized in that, The tail end of each metal needle is equipped with a needle hose connector. Several mounting holes arranged in a rectangular array are provided on the insulating pressure plate for fixing each needle hose connector. The mounting holes in the same column are interconnected and form an opening at one end of the insulating pressure plate. A locking strip is provided on the insulating pressure plate above the opening. At the same time, each needle hose connector is connected to a spinning solution supply pipeline with independent liquid supply.

5. The needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn according to claim 1, characterized in that, The longitudinal lifting device includes a lifting column, a longitudinal threaded guide rail disposed inside the lifting column, a drive slider fitted on the longitudinal threaded guide rail, and a rotary disk disposed on the top of the lifting column for driving the longitudinal threaded guide rail to rotate; the inner end of the cantilever platform is fixedly connected to the drive slider.

6. The needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn according to claim 5, characterized in that, A vertically set scale is provided on the outer wall of the lifting column, and its zero mark is flush with the upper surface of the nanofiber receiving platform.

7. The needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn according to claim 5, characterized in that, The inner end of the cantilever platform is provided with a limiting slot that is adapted to the outer walls on both sides of the lifting column. At the same time, two longitudinally arranged guide bars are provided on the inner side of the lifting column, and two guide grooves corresponding to the guide bars are provided on the drive slider.

8. The needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn according to claim 4, characterized in that, The insulating porous concave plate, the metal porous plate, the insulating pressure plate, and the locking strip are connected by a number of fixing nuts.

9. The needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn according to claim 1, characterized in that, The voltage loading device also includes a main high-voltage power supply connected to the main metal electrode post, and an auxiliary high-voltage power supply connected to the auxiliary metal electrode post.

10. The needle fixing and voltage loading device for multi-needle electrospun nanofiber yarn according to claim 1, characterized in that, The metal needles are arranged linearly, in a matrix, or in a ring, and the inner diameter of the ring-shaped auxiliary metal electrode is larger than the maximum outer diameter of the area where the metal needles are arranged.

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