Electrostatic spinning needle assembly and electrostatic spinning equipment comprising same

Abstract

The utility model discloses an electrostatic spinning needle assembly, and belongs to the technical field of spinning. The needle head assembly comprises a base support, a liquid guide groove, a high-voltage power supply wire holder and a needle head. The liquid guide groove is positioned on the base bracket; the high-voltage power connector is located in the middle of the base support. The needle heads are uniformly and fixedly mounted on the liquid guide groove; the base bracket is made of an insulating material; and the liquid guide groove is made of a conductive material. The high-voltage power supply wire holder is arranged in the middle of the base support, high-voltage current is conveyed from the middle of the liquid guide groove to the two ends, electric field intensity change at the edge is reduced, and spinning efficiency and yield are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spinning, in particular to an electrostatic spinning needle assembly and an electrostatic spinning device comprising the assembly. Background Art

[0002] Electrospinning technology is the fastest and simplest method for producing nanofibers and has been widely used in filtration, adsorption, tissue engineering, flexible sensors, and other related fields. Currently, electrospinning devices primarily utilize single-needle spinning, multi-needle spinning, and needleless spinning. Multi-needle spinning, in which multiple needles are arranged in a specific pattern on a liquid-guiding trough before spinning, effectively addresses the issues of low efficiency and slow spinning speeds associated with electrospinning equipment, allowing for rapid adaptation to market demands.

[0003] In addition to factors such as the inner diameter of the spinning needle outlet, the distance between the spinning needle and the receiving plate, the spinning voltage, and the type and concentration of the solution, multi-needle spinning equipment also needs to consider the influence of the electric field distribution. The existing power connection method is to connect a high-voltage power supply to one end of the multi-needle spinning assembly's liquid guide groove, where the electric field strength is the highest. The other end of the liquid guide groove is affected by the edge effect, and the electric field strength differs significantly from that at the connection end. This causes parameters such as the diameter, morphology, and distribution of the spun fiber to be uneven within the spinning area, significantly reducing the output and quality of the electrospinning device. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the utility model provides an electrospinning needle assembly. By setting a high-voltage power supply terminal block in the middle of the base bracket, high-voltage current is transmitted from the middle of the liquid guide groove to both ends, reducing the change of electric field strength at the edge and improving spinning efficiency and output.

[0005] The specific contents are as follows:

[0006] An electrospinning needle assembly, comprising a base support, a liquid guide groove, a high-voltage power supply terminal block and a needle;

[0007] The liquid guide groove is located on the base bracket;

[0008] The high-voltage power supply terminal block is located in the middle of the base bracket;

[0009] The needles are evenly and fixedly mounted on the liquid guide groove;

[0010] The base bracket is made of insulating material;

[0011] The liquid guiding groove is made of conductive material.

[0012] Furthermore, the cross-section of the liquid-conducting groove is rectangular.

[0013] Furthermore, the base bracket is provided with a groove matching the shape of the liquid guide groove.

[0014] Furthermore, the electrospinning needle assembly also includes a pressure reducing valve, and the inlet of the liquid guiding groove is connected to the pressure reducing valve.

[0015] Furthermore, a spring is provided in the high-voltage power supply terminal block. When a banana plug is inserted into the high-voltage power supply terminal block, one end of the spring contacts the banana plug and the other end abuts against the liquid guide groove.

[0016] Furthermore, the base bracket is provided with a plurality of fixing and mounting devices.

[0017] The utility model also provides an electrostatic spinning device comprising the electrostatic spinning needle assembly.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. This device sets a high-voltage power supply terminal block in the middle of the base bracket to transmit high-voltage current from the middle of the liquid guide groove to both ends, reducing the change of electric field intensity at the edges of both ends of the liquid guide groove and improving spinning efficiency and output.

[0020] 2. The cross-section of the liquid guide groove in this device is a rectangular cross-section. Compared with the circular cross-section, the rectangular cross-section is more resistant to external disturbances and maintains the stability of the spinning jet. On the other hand, the rectangular cross-section liquid guide groove is easier to accurately dock and fix with other spinning equipment components such as the base bracket and needle head, ensuring the stability and reliability of the entire spinning assembly.

[0021] 3. This device uses a pressure reducing valve to regulate the flow and pressure of the spinning solution. This effectively prevents excessive pressure on the needles during the spinning process, especially in the initial stages of spinning, which can cause unexpected dripping or spraying of the spinning solution at the front needle and delayed supply of spinning solution at the rear needle. This ensures uniformity and continuity of the spun fibers and conserves spinning solution. Furthermore, during the electrospinning process, excessive pressure can damage the equipment. The pressure reducing valve effectively protects key equipment and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 Schematic diagram of the structure of the electrospinning needle assembly in the embodiment.

[0024] Figure 2It is a left view of the electrospinning needle assembly in the embodiment.

[0025] Figure 3 2 is a cross-sectional view of the electrospinning needle assembly in the embodiment.

[0026] The reference numerals in the figures represent respectively:

[0027] 1-base bracket; 2-liquid guide groove; 3-high-voltage power supply terminal block; 4-needle; 5-pressure reducing valve; 6-spring; 7-fixing device; 8-liquid inlet conduit. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] Figure 1 This is a schematic diagram of the structure of the electrospinning needle assembly provided in the embodiment of the present application. Figure 1 The needle assembly includes: a base bracket 1, a liquid guide groove 2, a high-voltage power supply terminal block 3 and a needle 4.

[0030] The liquid guiding groove 2 is located on the base support 1 and is used to accommodate and guide the electrospinning liquid to ensure that the electrospinning liquid does not leak during the spinning process.

[0031] The high-voltage power supply terminal block 3 is located in the middle of the base support 1 .

[0032] A plurality of needles 4 are evenly and fixedly mounted on the liquid guiding groove 2 .

[0033] The base bracket 1 is made of insulating material, which effectively avoids safety problems such as short circuit and electric shock caused by the base bracket 1 conducting current, thereby damaging the electrospinning equipment.

[0034] The liquid-conducting groove 2 is made of conductive material and is used to effectively transmit high-voltage current.

[0035] In some embodiments, as Figure 2 As shown, the cross section of the liquid guiding groove 2 is rectangular. Compared with the circular cross section, the rectangular cross section is more resistant to external disturbances and maintains the stability of the spinning jet.

[0036] The base bracket 1 is provided with a groove that matches the shape of the liquid guide groove 2, which can effectively ensure the precise docking and fixation of the base bracket 1 and the liquid guide groove 2.

[0037] The electrospinning needle assembly is also equipped with a pressure-reducing valve 5, which is connected to the inlet of the liquid-conducting trough 2. The spinning solution flows from the liquid inlet conduit 8 through the pressure-reducing valve 5 into the liquid-conducting trough 2. By regulating the flow rate and pressure of the spinning solution, the pressure-reducing valve 5 effectively prevents excessive pressure in the needle 4 during the spinning process, which can cause unexpected dripping or spraying of the spinning solution at the front needle 4 and delayed supply of the spinning solution at the rear needle 4. This ensures the uniformity and continuity of the spun fibers and conserves spinning solution.

[0038] In some embodiments, as Figure 3 As shown, a spring 6 is provided in the high-voltage power supply terminal block 3. When a banana plug is inserted into the high-voltage power supply terminal block 3, one end of the spring 6 contacts the banana plug and the other end rests on the liquid guide groove 2, thereby realizing the transmission of high-voltage current.

[0039] To avoid the influence of electromagnetic interference, the insulation layer on the surface of the banana plug's wire is made of a material with anti-electromagnetic interference properties, aiming to improve the electromagnetic shielding performance of the wire and ensure the stability and safety of power transmission.

[0040] The base support 1 is provided with a plurality of fixing and mounting devices 7 to ensure the stability and safety of the base support 1 during the electrospinning process.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electrospinning needle assembly, characterized in that: It includes a base bracket (1), a liquid guide groove (2), a high-voltage power supply terminal block (3) and a needle (4); The liquid guide groove (2) is located on the base support (1); The high-voltage power supply terminal block (3) is located in the middle of the base support (1); The needles (4) are evenly and fixedly mounted on the liquid guiding groove (2); The base bracket (1) is made of insulating material; The liquid guiding groove (2) is made of conductive material.

2. The electrospinning needle assembly according to claim 1, characterized in that: The cross section of the liquid-conducting groove (2) is rectangular.

3. The electrospinning needle assembly according to claim 1, characterized in that The base bracket (1) is provided with a groove that matches the shape of the liquid guide groove (2).

4. The electrospinning needle assembly according to claim 1, characterized in that The electrospinning needle assembly further comprises a pressure reducing valve (5), and the inlet of the liquid guiding groove (2) is connected to the pressure reducing valve (5).

5. The electrospinning needle assembly according to claim 1, characterized in that: A spring (6) is provided in the high-voltage power supply terminal block (3). When a banana plug is inserted into the high-voltage power supply terminal block (3), one end of the spring (6) contacts the banana plug, and the other end abuts against the liquid guide groove (2).

6. The electrospinning needle assembly according to claim 1, characterized in that The base bracket (1) is provided with a plurality of fixing and mounting devices (7).

7. Electrospinning equipment, characterized in that The electrospinning device comprises the electrospinning needle assembly according to claims 1-6.

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