Static spinning nozzle without needle base and multiple needle heads

Abstract

The invention provides a needle-base-free multi-needle electrostatic spinning nozzle which comprises a liquid conveying base, a liquid storage base, a conductive assembly and multiple spinning needles, the distance between every two adjacent spinning needles is 1-3 mm, the inner diameter of each spinning needle is 0.1-0.3 mm, and the outer diameter of each spinning needle is 0.3-0.5 mm. Compared with the prior art, the multiple spinning needle heads are directly connected with the current-conducting plate, so that the distance between the adjacent needle heads is shortened to 1-3 mm, and short-distance ordered array nanofiber preparation is achieved; a plurality of second through holes are formed in the current-conducting plate, so that the array mode of the spinning needle heads on the current-conducting plate can be flexibly adjusted according to production requirements to meet the preparation requirements of different nanofiber arrays.

Description

Technical Field

[0001] The present application relates to the technical field of electrospinning, and in particular to an electrospinning nozzle with multiple needles and no needle holder. Background Art

[0002] Electrospinning technology uses a high-voltage electric field to stretch polymer solutions into micro-nano fibers, and is widely used in biomedicine, filtration materials and other fields.

[0003] Traditional single-needle electrospinning nozzles are extremely inefficient, while existing multi-needle electrospinning nozzles often use stainless steel dispensing needles with needle holders as spinning needles. These needle arrays lack flexibility, their assembly structures are complex, and they are difficult to clean, making them difficult to meet the demands of rapidly producing closely aligned arrays of nanofibers. Furthermore, integrated multi-needle electrospinning nozzles, due to manufacturing process limitations, have a limited number of needles, and their large diameters hinder the stable production of single, aligned nanofibers. Summary of the Invention

[0004] In view of the above problems, the present application provides an electrospinning nozzle with multiple needles and no needle holder.

[0005] To achieve the above-mentioned purpose, the inventor provides a needle-free multi-needle electrospinning nozzle, comprising an infusion seat, a liquid storage seat, a conductive component and a spinning needle, wherein the infusion seat is provided with a first through hole and an infusion hole, the first through hole is arranged above the infusion hole, and one end of the infusion hole is connected to the first through hole; the liquid storage seat is arranged below the infusion seat, and a liquid storage chamber is formed between the liquid storage seat and the infusion seat, the other end of the infusion hole is connected to the liquid storage chamber, and the liquid storage seat is provided with a third through hole, and the third through hole has Multiple; the conductive component includes a conductive plate and a conductive structure, the conductive plate is arranged on the bottom of the liquid storage chamber, and a plurality of second through holes are provided on the conductive plate, and the plurality of second through holes are all connected to the liquid storage chamber, and the number of the second through holes corresponds to the number of the third through holes one by one, and the second through holes are coaxially arranged with the third through holes; the spinning needle is arranged below the infusion seat, and there are a plurality of spinning needles, and one end of the plurality of spinning needles extends into the third through hole and the second through hole, and is connected to the conductive plate.

[0006] Preferably, the spinning nozzle also includes a guide plate, which is arranged above the conductive plate, and the outer wall of the guide plate is connected to the inner wall of the liquid storage chamber. A plurality of guide holes are provided on the guide plate, and the guide holes are coaxially arranged with the second through hole. A magnetic ring is provided in the guide hole, and the other end of the spinning needle extends into the guide hole and is magnetically connected to the magnetic ring.

[0007] Preferably, the spinning nozzle further comprises a paddle assembly, and the paddle assembly is used to cover the guide hole above the guide hole.

[0008] Preferably, the spinning nozzle further includes a liquid tube adapter, which is disposed on the top of the infusion seat and is threadedly connected to the first through hole.

[0009] Preferably, the spinning nozzle further comprises a sealing gasket, which is arranged between the conductive plate and the bottom of the liquid storage seat and is used to seal the third through hole, and the spinning needle passes through the sealing gasket.

[0010] Preferably, the distance between two adjacent spinning needles is 1 to 3 mm, the inner diameter of the spinning needle is 0.1 to 0.3 mm, and the outer diameter is 0.3 to 0.5 mm.

[0011] Preferably, the spinning needle is welded to the conductive plate.

[0012] Preferably, a plurality of spinning needle arrays are distributed on the conductive plate, and the array of the spinning needles is a circular array, a triangular array, or a linear array.

[0013] Preferably, the spinning nozzle further comprises a locking screw and a locking nut, and the infusion seat and the liquid storage seat are connected via the locking screw and the locking nut.

[0014] Preferably, a fastening screw is also included, a fourth through hole is also provided on the conductive plate, a mounting groove is provided at the bottom of the liquid storage seat, the mounting groove is coaxially arranged with the fourth through hole, the inner wall of the mounting groove is provided with a thread, one end of the fastening screw passes through the fourth through hole, passes through the sealing gasket, and is threadedly connected to the mounting groove.

[0015] Preferably, the conductive structure is a conductive screw, which passes through the bottom of the liquid storage seat and is threadedly connected to the liquid storage seat and the conductive plate respectively.

[0016] Different from the existing technology, the above technical solution has the following beneficial effects: compared with the existing technology, the present invention directly connects multiple spinning needles to the conductive plate, so that the distance between adjacent needles is shortened to 1 to 3 mm, realizing the close-range orderly array preparation of nanofibers; multiple second through holes are arranged on the conductive plate, so that the spinning needles can flexibly adjust the array mode of the spinning needles on the conductive plate according to production requirements to meet different nanofiber array preparation requirements; the infusion seat and the liquid storage seat are threadedly connected, and the conductive plate, the sealing gasket and the liquid storage seat are threadedly connected. This connection method is convenient for disassembly and assembly. When the nozzle needs to be cleaned, maintained or parts are replaced, the infusion seat and the liquid storage seat can be quickly separated. At the same time, when responding to different production needs, the conductive plate and the spinning needles can be quickly disassembled, and the preset conductive plate and spinning needles can be replaced to adapt to new production needs.

[0017] The above-mentioned records related to the content of the invention are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are only used to illustrate the principles, implementation methods, applications, features and effects of the specific embodiments of the present invention and other related contents, and are not to be considered as limiting the present application.

[0019] Figure 1 2 is a top view of the electrospinning nozzle in this embodiment;

[0020] Figure 2 for Figure 1 Cross-sectional view of the middle BB surface;

[0021] Figure 3 for Figure 1 Sectional view of the AA plane;

[0022] Figure 4 Schematic diagram of spinning needles arranged in a circular array on a conductive plate;

[0023] Figure 5 Schematic diagram of the spinning needles arranged in a triangular array on the conductive plate;

[0024] Figure 6 Schematic diagram of the guide plate disposed in the electrospinning nozzle in some embodiments.

[0025] The reference numerals in the above drawings are described as follows:

[0026] 1. Infusion seat; 11. Infusion hole; 2. Liquid reservoir seat; 21. Liquid reservoir chamber; 3. Conductive plate; 4. Spinning needle; 5. Liquid tube adapter; 6. Sealing gasket; 71. Locking screw; 72. Locking nut; 81. Fastening screw; 82. Conductive screw; 9. Guide plate; 91. Magnetic ring; 92. Pick. DETAILED DESCRIPTION

[0027] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0028] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0029] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0030] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0031] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.

[0032] Without further limitations, in this application, the words "include", "comprise", "have" or other similar open-ended expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product that includes the elements, so that the process, method or product that includes a series of elements may include not only those defined elements, but also other elements that are not explicitly listed, or also include elements inherent to such process, method or product.

[0033] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this manner, such as "multiple groups," "multiple times," etc., unless otherwise specifically defined.

[0034] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0035] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a direct connection, or an indirect connection through an intermediate medium; it can be a relationship in which two components are combined together, or an interaction relationship between two components, or a communication between two structures. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] See also Figures 1 to 6, this embodiment provides a needle-free multi-needle electrospinning nozzle, including an infusion seat 1, a liquid storage seat 2, a conductive component and a spinning needle 4, the infusion seat 1 is provided with a first through hole and an infusion hole 11, the first through hole is arranged above the infusion hole 11, and one end of the infusion hole 11 is connected to the first through hole; the liquid storage seat 2 is arranged below the infusion seat 1, and a liquid storage chamber 21 is formed between the liquid storage seat 2 and the infusion seat 1, and the other end of the infusion hole 11 is connected to the liquid storage chamber 21, the liquid storage seat 2 is provided with a third through hole, and there are multiple third through holes; the conductive component includes The conductive plate 3 and the conductive structure are provided. The conductive plate 3 is arranged on the bottom of the liquid storage chamber 21. A plurality of second through holes are provided on the conductive plate 3. The plurality of second through holes are all connected to the liquid storage chamber 21. The number of the second through holes corresponds to the number of the third through holes. The second through holes are coaxially arranged with the third through holes. The spinning needle 4 is arranged below the infusion seat 1. There are multiple spinning needles 4. One end of the multiple spinning needles 4 extends into the third through hole and the second through hole and is connected to the conductive plate 3. The distance between two adjacent spinning needles 4 is 1 to 3 mm.

[0037] The infusion seat 1 is covered on the liquid storage seat 2. The material of the infusion seat 1 is preferably an insulating and chemically resistant polymer material. The first through hole opened on the top of the infusion seat 1 is a cylindrical hole recessed inside the infusion seat 1, which serves as the input interface of the spinning solution. The inner wall of the first through hole is provided with an internal thread. The aperture size of the first through hole is adapted to the liquid tube adapter 5 to ensure smooth inflow of the spinning solution. The infusion hole 11 is a cylindrical channel connecting the first through hole and the liquid storage chamber 21. The flow rate and flow rate of the spinning solution entering the liquid storage chamber 21 are controlled by setting the appropriate aperture. In some embodiments, a protrusion is provided on the top of the infusion seat 1. The protrusion is hollow and connected to the infusion hole 11. The infusion seat 1 is connected to the liquid tube adapter 5 via the protrusion. The liquid reservoir 2 is tightly matched with the infusion reservoir 1. The material of the liquid reservoir 2 is preferably the same material as that of the infusion reservoir 1 or a compatible insulating material. The liquid storage chamber 21 formed after the liquid reservoir 2 and the infusion reservoir 1 are connected is used to temporarily store the spinning solution to ensure an uninterrupted supply of spinning solution during the spinning process and to ensure the continuity of spinning. The third through hole runs through the bottom of the liquid reservoir 2, providing a channel for the spinning needle 4 to extend. The conductive plate 3 is preferably made of a compact material with excellent conductive properties. The shape of the conductive plate 3 fits the bottom of the infusion chamber and has a flat surface. It is used to connect the spinning needle 4 and conduct electric charge. The second through hole set on the conductive plate 3 corresponds to the third through hole one by one and is coaxial. The apertures of the second through hole and the third through hole are equivalent to the maximum outer diameter of the spinning needle 4, ensuring that the spinning needle 4 can smoothly pass through the second through hole and the third through hole. The conductive structure is used to transfer the charge of the external high-voltage power supply to the conductive plate 3. The spinning needle 4 is made of stainless steel and is a hollow, slender tubular structure. The inner diameter of the spinning needle 4 is 0.1 to 0.3 mm, and the outer diameter is 0.3 to 0.5 mm. In this embodiment, a stainless steel capillary without a needle seat is used as the spinning needle 4. One end of the spinning needle 4 passes through the second through hole and the third through hole and extends to the outside. When the number of spinning needles 4 is not more than the number of the second through holes, the number of spinning needles 4 can be flexibly set according to production needs. Specifically, the spinning liquid is injected through the first through hole of the infusion seat 1 through the liquid tube adapter 5. Under the action of gravity or pressure, it flows into the liquid storage chamber 21 along the infusion hole 11. The liquid storage chamber 21 plays a buffering and temporary storage role, so that the spinning liquid can stably pass through the second through hole of the conductive plate 3 and flow into the spinning needle 4. The conductive structure conducts the charge of the high-voltage power supply to the conductive plate 3. Since the spinning needle 4 is connected to the conductive plate 3, the charge is transferred to the spinning needle 4, so that the spinning liquid in the needle is charged. Under the action of the high-voltage electric field, the charged spinning liquid overcomes the surface tension at the tip of the needle to form a Taylor cone. When the electric field force is large enough, the spinning liquid is ejected from the top of the Taylor cone to form a jet. In the process of flying to the receiving device, the solvent evaporates and finally solidifies to form nanofibers.

[0038] The spinning needle 4 is directly connected to the conductive plate 3, eliminating the needle seat design, simplifying the nozzle structure, reducing the problem of clogging and leakage at the connection between the needle seat and the needle, and reducing maintenance frequency and cost. Compared with the traditional single-needle nozzle, the multi-needle nozzle can exponentially increase the production efficiency of nanofibers and meet the needs of industrial large-scale production. Without the restriction of the needle seat, the distance between adjacent needles is reduced from more than 1 cm to 1-3 mm. At the same time, the number and array of spinning needles 4 can be flexibly set according to production needs, realizing the demand for rapid preparation of close-range ordered arrayed nanofibers.

[0039] See also Figure 6 In some embodiments, the spinning nozzle further includes a guide plate 9, which is disposed above the conductive plate 3. The outer wall of the guide plate 9 is connected to the inner wall of the liquid storage chamber 21. The guide plate 9 is provided with a plurality of guide holes, which are coaxially arranged with the second through hole. A magnetic ring 91 is provided in the guide hole. The other end of the spinning needle 4 extends into the guide hole and is magnetically connected to the magnetic ring 91. The guide plate 9 is a plate-shaped component disposed above the conductive plate 3. The material can be an insulating material compatible with the liquid storage seat 2. The outer wall of the guide plate 9 is tightly connected to the inner wall of the liquid storage chamber 21 and can be stably fixed in the liquid storage chamber 21. The guide plate 9 is provided with a plurality of guide holes, which are through holes passing through the guide plate 9. These guide holes correspond one-to-one with the second through holes on the conductive plate 3 and are coaxial, and play the role of guiding the flow direction of the spinning liquid; the magnetic ring 91 is an annular hollow component embedded in the guide hole, which is made of magnetic material and has a strong magnetic force; the spinning needle 4 is made of stainless steel, and the other end of the spinning needle 4 (the end close to the guide hole) extends into the magnetic ring 91, and the outer wall of the spinning needle 4 is magnetically connected to the inner wall of the magnetic ring 91. This connection method makes it possible to change the extended length of the spinning needle 4 from the outside of the electrospinning nozzle, which is convenient for flexible adjustment of the extended length of the spinning needle 4 according to different production conditions. Specifically, the guide plate 9 is installed in the liquid storage chamber 21 and above the conductive plate 3. The guide hole on the guide plate 9 is coaxial with the second through hole. After the spinning liquid flows into the liquid storage chamber 21, it can flow more concentratedly to the spinning needle 4 under the blocking of the guide plate 9 and the guidance of the guide hole, thereby reducing the disordered flow and retention of the spinning liquid in the liquid storage chamber 21; at the same time, the spinning needle 4 is connected to the guide plate 9 through the magnetic ring 91, which is convenient for quickly replacing spinning needles 4 of different specifications according to needs or quickly adjusting the length of the spinning needle 4 extending out of the spinning nozzle to meet production needs.

[0040] See also Figure 6In some embodiments, the spinning nozzle further includes a paddle 92 assembly, which is used to cover the guide hole above the guide hole. The paddle 92 assembly includes a paddle 92, a connecting rod, and a drive motor. The paddle 92 is a plate-shaped structure with multiple through holes. The paddle 92 covers the guide hole of the guide plate 9 to prevent the spinning solution from flowing into the guide hole. The paddle 92 has protrusions on both sides, and the guide plate 9 has grooves at corresponding positions. The protrusions are accommodated in the grooves, and the protrusions on the paddle 92 can move in the grooves. The driving motor is arranged outside the spinning nozzle, one end of the connecting rod is connected to the driving motor, and the other end is inserted into the spinning nozzle and connected to the paddle 92. The driving motor rotates and then drives the paddle 92 to move relative to the guide plate 9 through the connecting rod. By moving the paddle 92, the number of through holes on the paddle 92 and the guide holes on the guide plate 9 that are connected can be adjusted, so as to control a part of the spinning needles 4 to be able to flow out the spinning liquid for spinning work, and the other part of the spinning needles 4 cannot be used for spinning work, so that the operator can flexibly control the number of spinning needles 4 participating in the spinning work according to production needs.

[0041] See also Figure 2 and Figure 3 In this embodiment, the spinning nozzle also includes a liquid tube adapter 5, which is arranged on the top of the infusion seat 1 and is threadedly connected to the first through hole. The liquid tube adapter 5 is a key component for connecting the infusion seat 1 to the external infusion system. It is preferably made of metal material. One end of the liquid tube adapter 5 is provided with an external thread, which is adapted to the first through hole on the top of the infusion seat 1 and is tightly connected by rotating and tightening. The other end is designed as a standard interface, which can adapt to infusion pipes of different specifications, such as silicone tubes, polyvinyl chloride tubes, etc. The internal channel of the liquid tube adapter 5 is a smooth cylindrical shape, which ensures that the resistance of the spinning solution is minimized during the transmission process, and the inner wall is polished and coated to prevent the residue and wall hanging of the spinning solution, thereby ensuring the purity of the spinning solution and the transmission stability. The setting of the liquid tube adapter 5 significantly enhances the adaptability of the nozzle to the external infusion system. According to actual production needs, infusion pipes of different materials and specifications can be flexibly replaced, thereby expanding the application range of the nozzle.

[0042] See also Figure 2 and Figure 3In this embodiment, the spinning nozzle also includes a sealing gasket 6, which is arranged between the conductive plate 3 and the bottom of the liquid reservoir 2 to seal the third through hole. The spinning needle 4 passes through the sealing gasket 6. The sealing gasket 6 is preferably made of chemically stable silicone rubber. The shape of the sealing gasket 6 conforms to the bottom of the liquid reservoir 2. The sealing gasket 6 is placed between the conductive plate 3 and the bottom of the liquid reservoir 2. When the conductive plate 3, the sealing gasket 6, and the liquid reservoir 2 are fixed together by tightening screws 81 or other fastening methods, the sealing gasket 6 is squeezed and elastically deformed. Due to its good elasticity and flexibility, it can fit tightly to the bottom of the liquid reservoir 2 and the lower surface of the conductive plate 3, filling the tiny gap between the two and forming a reliable sealing structure. During the spinning process, the spinning solution in the liquid storage chamber 21 is under pressure and cannot leak from the connection between the third through hole and the spinning needle 4 due to the obstruction of the sealing gasket 6. This ensures that the spinning solution can only be ejected from the tip of the spinning needle 4, maintaining the normal progress of the spinning process.

[0043] In this embodiment, the spinning needle 4 is welded to the conductive plate 3. One end of the spinning needle 4 is inserted into the second through-hole, and the spinning needle 4 and the conductive plate 3 are welded together at the bottom edge of the second through-hole. This allows for efficient charge transfer from the conductive plate 3 to the spinning needle 4, ensuring sufficient charge within the spinning solution 4, ensuring jet stability and fiber formation quality during the spinning process. Furthermore, by adjusting the depth of the spinning needle 4 inserted into the second through-hole to change the position of the welding point on the spinning needle 4, the length of each end of the spinning needle 4 exposed outside the spinning nozzle can be adjusted, thereby adjusting the spatial electric field distribution and improving the uniformity of the spinning structure.

[0044] See also Figure 4 and Figure 5 In this embodiment, a plurality of spinning needles 4 are arranged in an array on the conductive plate 3. The array configuration of the spinning needles 4 can be circular, triangular, or linear. These various array configurations provide a high degree of flexibility and specificity for different spinning applications. A circular array can produce uniform circular or annular fiber structures, meeting the needs of filtration, sensing, and other fields for fiber materials with specific shapes. A triangular array, with its high-density arrangement of needles, is suitable for industrial applications with high fiber yield requirements. A linear array enables the production of fiber materials with specific orientations, expanding the application range of nanofibers in composite materials, biomedicine, and other fields. Specifically, different array configurations can be adopted based on production requirements. Specifically, the spinning needles 4 are first welded to the conductive plate 3 in the desired array and then assembled into the liquid storage chamber 21. If a different array configuration is needed to meet production requirements, the conductive plate 3 and spinning needles 4 within the liquid storage chamber 21 can be replaced. Users can select the appropriate array configuration based on specific product requirements to optimize the spinning process and improve product performance and added value.

[0045] See also Figure 2 and Figure 3 In this embodiment, the spinning nozzle further includes a locking screw 71 and a locking nut 72, and the infusion seat 1 and the liquid storage seat 2 are connected via the locking screw 71 and the locking nut 72. Optionally, there are four locking screws 71 and four locking nuts 72, and through holes matching the locking screws 71 are provided at corresponding positions of the infusion seat 1 and the liquid storage seat 2. The locking screws 71 pass through the through holes of the infusion seat 1 and the liquid storage seat 2 respectively, and are then tightened on the other side of the liquid storage seat 2 via the locking nut 72. The two cooperate to generate a strong axial tightening force, so that the infusion seat 1 and the liquid storage seat 2 fit tightly together, forming a stable liquid storage chamber 21 structure. At the same time, the tightness and sealing of the connection can be controlled by adjusting the tightening torque. The infusion seat 1 and the liquid storage seat 2 are connected by screw threads to form a detachable structure. This connection method is convenient for disassembly and assembly. When the nozzle needs to be cleaned, maintained or parts replaced, the infusion seat 1 and the liquid storage seat 2 can be quickly separated. The operation is simple and convenient, which improves the maintainability and ease of use of the equipment.

[0046] See also Figure 2 and Figure 3In this embodiment, the spinning nozzle further includes a fastening screw 81. The conductive plate 3 is further provided with a fourth through-hole. The bottom of the liquid reservoir 2 is provided with a mounting groove, which is coaxially arranged with the fourth through-hole. The inner wall of the mounting groove is provided with a thread. One end of the fastening screw 81 passes through the fourth through-hole, penetrates the sealing gasket 6, and is threadedly connected to the placement groove. Optionally, there are two fastening screws 81, which are used to fix the conductive plate 3 and the sealing gasket 6. The diameter of the fourth through-hole on the conductive plate 3 is adapted to the outer diameter of the fastening screw 81, ensuring that the fastening screw 81 can pass smoothly while the spinning solution does not flow out of the fourth through-hole. The mounting groove at the bottom of the liquid reservoir 2 is a cylindrical blind hole, the inner wall of which is processed with an internal thread that matches the fastening screw 81, and the depth is adapted to the length of the fastening screw 81. Specifically, the fastening screw 81 passes through the fourth through hole of the conductive plate 3 and the sealing gasket 6 in sequence, and is finally screwed into the mounting groove at the bottom of the liquid storage seat 2. In the process of tightening the fastening screw 81, downward pressure is generated, and the conductive plate 3 is tightly fixed to the bottom of the liquid storage seat 2. At the same time, the sealing gasket 6 is deformed under the action of pressure, further enhancing the sealing between the conductive plate 3 and the liquid storage seat 2, and preventing the spinning solution from leaking from the third through hole. The setting of the fastening screw 81 provides a stable and reliable fixing method for the conductive plate 3, ensuring the positional stability of the conductive plate 3 during the spinning process, avoiding unstable charge conduction caused by loosening of the conductive plate 3, thereby ensuring that the spinning solution is uniformly charged during the spinning process, which is beneficial to improving the molding quality and uniformity of the fiber. The use of the sealing gasket 6 in conjunction with the fastening screw 81 further enhances the sealing of the nozzle, effectively prevents leakage of the spinning solution, reduces the waste of spinning solution and equipment pollution, and reduces maintenance costs. In addition, this fixing method facilitates the installation, disassembly and replacement of the conductive plate 3. When the conductive plate 3 needs to be inspected, cleaned or replaced, the operation is simple and quick, which improves the maintainability of the equipment, helps to extend the service life of the nozzle, and ensures the continuity and stability of production.

[0047] See also Figure 3 and Figure 4In this embodiment, the conductive structure is a conductive screw 82, which passes through the bottom of the liquid storage seat 2 and is threadedly connected to the liquid storage seat 2 and the conductive plate 3 respectively. As a conductive structure, the conductive screw 82 is preferably made of a metal material with excellent conductivity, and has the dual functions of conduction and fastening. A through hole with an aperture size that matches the outer diameter of the conductive screw 82 is provided at the bottom of the liquid storage seat 2, and an internal thread is provided on the inner wall of the through hole, and a threaded hole is provided at the corresponding position on the conductive plate 3. Specifically, after the conductive screw 82 passes through the through hole of the liquid storage seat 2, it is screwed together with the threaded hole of the conductive plate 3 to form a conductive path from the external high-voltage power supply to the conductive plate 3. The threaded connection not only ensures good electrical contact and enables efficient charge conduction, but also ensures that the conductive plate 3 is firmly fixed to the bottom of the liquid storage seat 2 by tightening, ensuring that the conductive structure is stable and reliable during the spinning process, and will not loosen the connection or reduce the conductive performance due to factors such as vibration. The provision of conductive screws 82 as conductive structures achieves an integrated design of conduction and fastening functions, simplifying the nozzle structure and reducing the risk of conductive failures due to poor connections. This ensures efficient and stable charge conduction, allowing each spinning needle 4 to receive a uniform charge, thereby improving the stability of the spinning process and the consistency of fiber quality. Furthermore, the threaded connection facilitates the installation, removal, and replacement of conductive screws 82.

[0048] Compared with the prior art, the present invention directly connects multiple spinning needles 4 to the conductive plate 3, so that the distance between adjacent needles is shortened to 1 to 3 mm, realizing the close-range orderly array preparation of nanofibers; multiple second through holes are provided on the conductive plate 3, so that the spinning needles 4 can flexibly adjust the array mode according to production requirements to meet different nanofiber array preparation requirements; the infusion seat 1 and the liquid storage seat 2 are threadedly connected, and the conductive plate 3, the sealing gasket 6 and the liquid storage seat 2 are threadedly connected. This connection method is convenient for disassembly and assembly. When the nozzle needs to be cleaned, maintained or parts are replaced, the infusion seat 1 and the liquid storage seat 2 can be quickly separated. At the same time, when responding to different production needs, the conductive plate 3 and the spinning needle 4 can be quickly disassembled, and the preset conductive plate 3 and spinning needle 4 can be replaced to adapt to new production needs.

[0049] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A needle-less multi-needle electrospinning nozzle, characterized in that: include: an infusion seat, wherein the infusion seat is provided with a first through hole and an infusion hole, the first through hole is arranged above the infusion hole, and one end of the infusion hole is connected to the first through hole; A liquid storage seat is provided below the infusion seat, a liquid storage chamber is formed between the liquid storage seat and the infusion seat, the other end of the infusion hole is in communication with the liquid storage chamber, and the liquid storage seat is provided with a third through hole, and the third through hole is provided in plurality; a conductive assembly, the conductive assembly comprising a conductive plate and a conductive structure, the conductive plate being disposed on the bottom of the liquid storage chamber, the conductive plate being provided with a plurality of second through holes, the plurality of second through holes being in electrical communication with the liquid storage chamber, the number of the second through holes corresponding to the number of the third through holes, and the second through holes being coaxially disposed with the third through holes; A spinning needle head is arranged below the infusion seat. There are multiple spinning needle heads, and one end of each of the spinning needle heads extends into the third through hole and the second through hole and is connected to the conductive plate.

2. The needle-free multi-needle electrospinning nozzle according to claim 1, characterized in that: It also includes a guide plate, which is arranged above the conductive plate, the outer wall of the guide plate is connected to the inner wall of the liquid storage chamber, a plurality of guide holes are provided on the guide plate, the guide holes are coaxially arranged with the second through hole, a magnetic ring is provided in the guide hole, and the other end of the spinning needle head extends into the guide hole and is magnetically connected to the magnetic ring.

3. The needle-free multi-needle electrospinning nozzle according to claim 2, characterized in that: It also includes a paddle assembly, which is used to cover the guide hole above the guide hole.

4. The needle-free multi-needle electrospinning nozzle according to claim 1, characterized in that: It also includes a liquid tube adapter, which is arranged on the top of the infusion seat and is threadedly connected to the first through hole.

5. The needle-free multi-needle electrospinning nozzle according to claim 1, characterized in that: It also includes a sealing gasket, which is arranged between the conductive plate and the bottom of the liquid storage seat and is used to seal the third through hole. The spinning needle passes through the sealing gasket.

6. The needle-free multi-needle electrospinning nozzle according to claim 1, characterized in that: The distance between two adjacent spinning needles is 1-3 mm, the inner diameter of the spinning needle is 0.1-0.3 mm, and the outer diameter is 0.3-0.5 mm.

7. The needle-free multi-needle electrospinning nozzle according to claim 1, characterized in that: The spinning needle head is welded to the conductive plate.

8. The needle-free multi-needle electrospinning nozzle according to claim 1, characterized in that: A plurality of spinning needle arrays are distributed on the conductive plate, and the array of the spinning needles is a circular array, a triangular array, or a linear array.

9. The needle-free multi-needle electrospinning nozzle according to claim 1, characterized in that: It also includes a locking screw and a locking nut, and the infusion seat and the liquid storage seat are connected through the locking screw and the locking nut.

10. The needle-base-free multi-needle electrospinning nozzle according to claim 1, characterized in that: It also includes a fastening screw, a fourth through hole is provided on the conductive plate, a mounting groove is provided on the bottom of the liquid storage seat, the mounting groove is coaxially arranged with the fourth through hole, the inner wall of the mounting groove is provided with a thread, one end of the fastening screw passes through the fourth through hole, passes through the sealing gasket, and is threadedly connected to the placement groove.

Images