CN210065992U

CN210065992U - Helical blade nanofiber generator

Info

Publication number: CN210065992U
Application number: CN201920563008.7U
Authority: CN
Inventors: 林童; 牛海涛; 李俊超
Original assignee: Shanghai Yuntong Nano Materials Technology Co Ltd
Current assignee: Shanghai Yuntong New Material Technology Co ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-02-14
Anticipated expiration: 2029-04-23

Abstract

The utility model provides a helical blade nanofiber generator through having certain contained angle and the sequencing of independent assortment with helical blade and axial to and the direction of rotation that adopts helical blade arranges for forward and reverse just crossing honeycomb formula, has realized that this novel compound helical blade nanofiber generator can improve spinning output, optimize solution jet flow distribution, eliminate the inhomogeneous distribution of nanofiber on the collector, improves the homogeneity of product.

Description

Helical blade nanofiber generator

Technical Field

The utility model belongs to the technical field of electrostatic spinning, concretely relates to novel helical blade nanofiber generator.

Background

The electrostatic spinning is a commonly used technology for preparing polymer nano fibers, and has the characteristics of wide application range, simple operation, controllable process and the like. The traditional electrostatic spinning (namely needle electrostatic spinning) technology has limited spinning production capacity, each spinning needle can only generate one polymer spinning, and the quantity of fibers produced by each needle per hour is less than 300 mg, so that the market demand of increasing nanofibers cannot be met. Faced with this problem, the conventional method for increasing the yield of electrospun nanofibers is to arrange a large number of needles. However, there is electric field interference between the different needles, limiting their minimum separation, increasing the cost of equipment space. Meanwhile, the needle is easily clogged by the sediment or impurities in the viscous solution, so that the needle needs to be frequently interrupted and cleaned during the spinning process, and the quality and yield of the nanofiber product are affected.

Therefore, the needle-free electrostatic spinning nozzle is invented, the yield of the nano-fibers is greatly improved, and the quality of the nano-fibers is ensured. For example, chinese utility model patent CN 202107802U provides an electrostatic spinning apparatus including a helical blade nanofiber generator. The rotation of the helical blade generator causes the polymer solution to be uniformly distributed on the whole helical blade, and when the polymer solution is positioned in the electric field of the helical blade and the fiber collector and the electric field intensity is higher than the critical electric field intensity capable of generating the Taylor cone, the helical blade nanofiber generator can generate nanofibers. In this spinning system, as the helical blade generator rotates, it is closest to the collection device at the point of the blade tip where the electric field strength is greatest, the most fiber is produced per unit time, and less fiber is produced elsewhere. This makes the collected fiber film surface susceptible to streaking of the screw pitch width, which affects the uniformity of the product.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art's the aforesaid not enough, provide a helical blade nanofiber generator that can effectively improve nanofiber membrane homogeneity.

The technical problem to be solved can be implemented by the following technical scheme.

The utility model provides a helical blade nanofiber generator, includes a pivot and set up in the pivot outside is helical blade who arranges, its characterized in that does, helical blade has different spiral rotation angle's helical blade including being at least two kinds that the net formula is alternately arranged.

As a further improvement of the present invention, the helical blade is composed of two helical blades, i.e., a first helical blade that rotates in a forward direction with respect to the rotation shaft and a second helical blade that rotates in a reverse direction with respect to the rotation shaft.

As a further improvement of the technical scheme, the number of the blades of the two helical blades is equal or unequal.

As a preferred embodiment of the present invention, the number of the two kinds of helical blades is equal, and the number of each kind of helical blade is 4 or 6.

As a further improvement of the technical scheme, the pitch of the spiral blade is 30-50 mm.

As a further improvement of the technical scheme, the angle between the plane of the helical blade and the rotating shaft is 45-90 degrees.

As another preferred embodiment of the present invention, the main structure of the rotating shaft is a hollow sealing cylinder.

As another preferred embodiment of the present invention, the diameters of the helical blades near the ends of the two sides of the rotating shaft are smaller than the diameter of the middle part of the helical blades.

Also as a further improvement of the technical scheme, the pitch of the helical blade is 5-2000mm, the thickness is 0.5-10mm, the length is 2-5000mm, and the height is 1-200 mm; the diameter of the rotating shaft is 5-1000 mm.

Preferably, the thickness of the helical blade is 1-5mm, the length is 200-2000mm, and the height is 10-40 mm; the diameter of the rotating shaft is 10-40 mm.

The helical blade nanofiber generator adopting the technical scheme has the following beneficial effects:

1. the uniformity of nanofiber spinning can be enhanced through the honeycomb type helical blade nanofiber generator.

2. Through the honeycomb type helical blade nanofiber generator, the nanofiber spinning efficiency can be enhanced.

Drawings

Fig. 1 is a schematic structural diagram of a honeycomb rotary vane nanofiber generator according to the present invention.

Fig. 2 is a partially enlarged schematic view at the left end of fig. 1.

Fig. 3 is a side view of a honeycomb rotary vane nanofiber generator of the present invention.

Fig. 4 is an axial schematic view of fig. 1.

Detailed Description

The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1-4, it is a new type of honeycomb rotary vane nanofiber generator. The core of the device is a rotating shaft, blades, an arrangement mode of the blades on the rotating shaft at different angles, a forward and reverse intersection mode and an intersection angle.

The rotary blade nanofiber generator prepares viscous liquid into nanofibers by using the electrostatic spinning principle. The rotary blade nanofiber generator comprises a rotary blade and a rotating shaft 200, wherein the rotary blade is connected with the rotating shaft 200. The rotating shaft 200 is a sealed cylindrical structure, which not only ensures certain strength and rigidity, but also has the characteristic of portability.

The helical blades include a forward helical blade 110 and a reverse helical blade 120, which are arranged in a cross to form a honeycomb-type grid. The spiral blade can be a group of spiral blades or a plurality of groups of spiral blades, and the number of the forward spiral blades and the number of the reverse spiral blades can be different. The number of blades is preferably 4 and 6.

The pitch of the helical blades is 5mm to 2000mm, preferably 30mm to 50 mm. The cross-sectional shape of each helical blade may be semi-circular, rectangular, square, triangular, oval or other shape. The plane of each helical blade is at an angle of 0 to 360 degrees, preferably 45 to 90 degrees, to the axial direction. The thickness of each helical blade is 0.5mm to 10mm, preferably 1mm to 5 mm; a length of 2mm to 5000mm, preferably 200mm to 2000 mm; the height is 1mm to 200mm, preferably 10mm to 40 mm. The diameter of the rotating shaft 200 is 5mm to 1000mm, preferably 10mm to 40 mm.

When the device is implemented, the nano generator is arranged in the solution tank, the high-voltage power supply is connected to the rotating shaft, the rotating shaft is connected with the forward spiral and the reverse spiral, and then high-voltage current is conducted to the forward spiral and the reverse spiral. The forward and directional helical blades are mainly used for concentrating the electrostatic field at the edges of the blades, and the influence of the shape and size of the blades on the electrostatic field can be greatly reduced. When multiple sets of forward and reverse helical blades are used and intersect, the avoidance of electric field interference from adjacent blades can be reduced or accomplished by optimizing the distance between the blades. The forward and directional blades may be of any material, either conductive or insulating. The material requirement for the helical blades is that they do not dissolve and degrade in the spinning solution. The blades in the same direction are spaced at intervals to reduce the mutual influence among the blades, and the distance between the blades in the axial direction, the thickness, the diameter and the structure of the blades can be adjusted. When the same blades are used, the electric field intensity of the blades at the two ends of the spiral blade of the spinning head is higher than that of the blades in the middle, so that the blades at the two ends are preferably designed to be gradually reduced in diameter. Wherein, the forward helical blade and the reverse helical blade can ensure the uniformity and consistency of spinning.

In the spinning process, the solution is spun along with the rotation of the rotating shaft. The spinning is more uniform and consistent. The spinning efficiency is more efficient. More uniform and efficient processing of viscous liquids (e.g., polymer solutions, sol-gels, particle suspensions or melts) into nanofibers or nanofiber networks can be achieved.

The utility model discloses a novel honeycomb formula helical blade nanofiber generator. Through having certain contained angle and can the independent assortment sequencing with helical blade and axial to and the direction of rotation that adopts helical blade is forward and reverse and crossing setting, realized this novel compound helical blade nanofiber generator can improve spinning output, optimize solution jet flow distribution, eliminate the inhomogeneous distribution of nanofiber on the collector, improve the homogeneity of product.

Claims

1. The utility model provides a helical blade nanofiber generator, includes a pivot and set up in the pivot outside is helical blade who arranges, its characterized in that, helical blade is including the helical blade that is two at least types that the net formula is crisscross to be arranged and has different spiral rotation angle.

2. The spiral-bladed nanofiber generator of claim 1 wherein the spiral blade is comprised of both a first spiral blade that rotates in a forward direction relative to the axis of rotation and a second spiral blade that rotates in a reverse direction relative to the axis of rotation.

3. The spiral-bladed nanofiber generator of claim 2, wherein the number of blades of the two spiral blades is equal or unequal.

4. The spiral-bladed nanofiber generator of claim 3 wherein the two types of spiral blades are equal in number of blades, with each spiral blade being 4 or 6.

5. The spiral-bladed nanofiber generator of claim 1, wherein the pitch of the spiral blades is 30-50 mm.

6. The spiral-bladed nanofiber generator of claim 1, wherein the plane of the spiral blade is at an angle of 45-90 ° to the axis of rotation.

7. The spiral-bladed nanofiber generator of claim 1, wherein the main structure of the rotating shaft is a hollow sealed cylinder.

8. The spiral-bladed nanofiber generator of claim 1 wherein the diameter of the spiral blade near the ends of the rotating shaft on both sides is tapered relative to the diameter of the mid-section portion of the spiral blade.

9. The spiral-bladed nanofiber generator of claim 1, wherein the spiral blades have a pitch of 5-2000mm, a thickness of 0.5-10mm, a length of 2-5000mm, and a height of 1-200 mm; the diameter of the rotating shaft is 5-1000 mm.

10. The spiral blade nanofiber generator as claimed in claim 9, wherein the spiral blade has a thickness of 1-5mm, a length of 200-2000mm and a height of 10-40 mm; the diameter of the rotating shaft is 10-40 mm.