CN204738069U - Rotating ring type electrostatic spinning nanofiber yarn preparation device - Google Patents

Abstract

The application relates to a swivel type electrostatic spinning nanofiber yarn preparation device, specifically includes: the negative pole and the positive pole of a high-voltage power supply (1) are respectively connected with a negative pole spinning head (3) of a negative pole solution tank (2) and a positive pole spinning head (5) of a positive pole solution tank (4), and a collector transmission device (7), a circular ring collector (6), a winding transmission device (9) and a winding device (8) are arranged on the collector. The negative pole solution tank (2) and the positive pole solution tank (4) respectively provide spinning solutions for the negative pole spinning head (3) and the positive pole spinning head (5), the spinning solutions are converted into nano fibers by the fiber generator under the action of high voltage, and an upward fiber cone is formed above the circular ring collector (6). The nanofiber yarn is pulled out from the vertex of the fiber cone, twisted by the rotation of the circular ring collector (6), and finally collected into continuous nanofiber yarn by the winding device (8). The nanofiber yarn has strong mechanical strength and can be widely used for producing various nanofiber textiles.

Description

Rotary ring electrospinning nanofiber yarn preparation device

technical field

The utility model relates to an electrostatic spinning nanofiber yarn forming device, in particular to a device capable of continuously preparing and twisting electrostatic spinning nanofiber yarns, and belongs to the field of electrostatic spinning devices.

Background technique

Nanofibers have gained enormous popularity in the last decade. They can be prepared by several techniques such as stretching, template synthesis, centrifugal spinning, self-assembly, and phase separation and electrospinning. Electrospinning to prepare nanofibers has attracted special attention because of its diversity, flexibility, and ease of forming uniform webs. Electrostatic nanofibers have enormous potential in various fields including filtration, biomedicine, controlled drug release, catalysis, sensors, protective clothing, energy storage and generation, and more.

Electrostatic nanofibers are usually collected in the form of fibrous nonwovens with low strength. Recently, electrospun nanofibers have been fabricated into twisted continuous fiber bundles, i.e., nanofiber yarns, with the aim of preparing three-dimensional (3D) nanofibrous structures and improving mechanical properties. (3D) Nanofibrous structures will have the potential to impart new functions. In some cases, nanofiber bundles or nanofiber strips can be twisted. Or continuously produce nanofiber yarns by directly using liquid tanks, solid surfaces and funnels or tubes as collectors.

A solution tank was initially reported to collect untwisted nanofiber bundles. The nanofibers deposited on the liquid surface are directly coiled to obtain non-twisted fiber bundles. When a vortex is generated at the bottom of the liquid bath, twisted nanofiber yarns can be obtained. Liquid collection helps to remove charges from the fibers. However, fiber morphology, composition and orientation can be affected by the liquid bath, and only polymers that are not dissolved in the liquid can be processed. It is also difficult to control yarn evenness and control twist using eddy current.

The direct collection of electrospun nanofibers into continuous twisted yarns without using a solution tank collector is highly promising. Several methods have been recently reported using solid surfaces to collect nanofiber yarns, and nanofiber yarns have been shown to enhance strong mechanical properties.

Chinese invention patent application "A device and method for continuous preparation of oriented electrospinning nanofiber yarn" (application number 201310058070.8, publication number CN103088478A), discloses a continuous preparation device and method for oriented electrospinning nanofiber yarn.

As well as other prior art, it is summarized as the situation in Fig. 1 . The core components of the nanofiber yarn continuous preparation device include: a spinning head, a collector 60 , a collector transmission 70 , a winding device 8 , and a winding transmission 9 .

As shown in FIG. 1 , the spinning head includes: a negative electrode spinning head 3 and a positive electrode spinning head 5 . Negative electrode spinning head 3 and positive electrode spinning head 5 eject jet flow I18 and jet flow II19 respectively.

The collector 60 and the yarn guide rod 21, the collector 60 is a metal circular target center or conical shape, the metal circular target center is connected with one end of the insulating rod, the insulating rod is driven to rotate by the motor I, the metal tip of the front part of the yarn guide rod 21 Align the center of the metal circular target, the yarn guide rod 21 and the yarn reel are arranged perpendicular to each other, the yarn reel is driven to rotate by the motor II, and the center of the metal circular target, the insulating rod, the motor I, and the yarn guide rod 21 are arranged on the same center line .

The negative electrode spinning head 3 and the positive electrode spinning head 5 are arranged on the left and right sides of the collector 60 and the yarn guide rod 21 which are symmetrical to each other. The negative spinning head 3 is connected to the high voltage electrostatic positive terminal 101 , and the positive spinning head 5 is connected to the high voltage negative negative terminal 102 .

During the electrospinning of the yarn, the nanofibers are induced to form conical nanofiber bundles 23 at the circumference of the funnel collector. As the funnel turns, fibers are pulled from the apex of the fiber cone, twisted to form yarn, which is wound on a rotary roll winder. This device allows control of fiber/yarn diameter and twist. Since nanofiber generation and yarn winding are performed in the same area, the quality of already twisted yarn is easily affected by the nanofibers spun later. The result is mixed structures or bent nanofibers that reduce the quality of the yarn.

Utility model content

The purpose of this utility model is to provide a rotary-type electrospinning nanofiber yarn preparation device to overcome the above-mentioned shortcomings and deficiencies in the prior art. In order to improve spinning efficiency, needle-free electrospinning nanofiber production technology has recently begun to emerge. Its output is dozens to hundreds of times of the efficiency of needle spinning equipment, and its spinning quality has also been greatly improved. Nevertheless, its production efficiency still has a certain gap compared with the current melt-blown technology for producing micron fibers, and there is still room for further improvement of efficiency and cost reduction. Therefore, in order to solve the above problems, the utility model makes the production process more efficient, environmentally friendly and safe.

The technical problem to be solved by the utility model can be realized through the following technical solutions:

The swivel-type electrospinning nanofiber yarn preparation device is characterized in that it includes: a high-voltage power supply, a negative electrode solution tank, a negative electrode spinning head, a positive electrode solution tank, a positive electrode spinning head, a ring collector, and a ring collector transmission device , Winding device;

The negative and positive stages of the high-voltage power supply are respectively connected to the negative spinning head and the positive spinning head;

The negative electrode solution tank and the positive electrode solution tank supply liquid to the negative electrode spinning head and the positive electrode spinning head respectively;

The collector transmission device is connected with the ring collector and arranged above the positive electrode solution tank and the positive electrode spinning head;

The winding device is connected with the winding transmission device and arranged above the ring collector.

Wherein, the negative electrode spinning head and the positive electrode spinning head are arranged in a circular structure, which is composed of a disc and a rod in the middle of the disc, and the rod drives the disc to rotate; the diameter of the disc is 5 mm to 300 mm, and the disc The thickness of the edge is between 0.2 mm and 20 mm.

Wherein, the negative electrode spinning head and the positive electrode spinning head are arranged as a spring structure, which is composed of a spring wound by a metal wire and connected with a rod in the middle, and the rod drives the spring to rotate; the diameter of the metal wire of the spring is 0.2 mm to 20 mm, the diameter of the spring is 20 mm to 200 mm, and the distance between the spring wires is 10 mm to 200 mm.

Wherein, the negative electrode spinning head and the positive electrode spinning head are arranged as a screw structure, and the screw structure is composed of a helical blade connected with a rod in the middle, and the rod drives the helical blade to rotate; the edge diameter of the helical blade is 0.2 mm ~20 mm, the diameter of the helical blades is 20 mm-200 mm, and the distance between the helical blades is 10 mm-200 mm.

Wherein, the negative electrode spinning head and the positive electrode spinning head are arranged as a hollow needle structure, the hollow needle structure is composed of a hollow needle and a liquid propeller, and the inner diameter of the hollow needle is 0.05 mm to 30 mm.

Wherein, the negative electrode spinning head and the positive electrode spinning head are loaded with high voltage and have the function of emitting solution.

Wherein, the negative electrode solution tank and the positive electrode solution tank are used to store the solution and supply liquid to the negative electrode spinning head and the positive electrode spinning head, and are open or closed tank structures.

Wherein, the ring collector is composed of a hollow ring in the middle, which is driven and rotated by the transmission device of the ring collector; the ring collector divides the entire working area into the spinning area below and the collecting area above. area.

Wherein, the circular collector has a width of 1 mm to 200 mm, an outer diameter of 30 mm to 300 mm, and an inner diameter of 28 mm to 290 mm; the circular collector is installed horizontally between the spinning area and the collecting area.

Further, the circular collector is driven to rotate by the collector transmission device, and the rotation speed is 400 to 2000 revolutions per minute.

Furthermore, the collector transmission device is composed of a power unit and transmission mechanisms such as belts, chains, and gears, and is connected to the circular collector.

Wherein, the winding device is a rotating roller, and the rotating roller is provided with a yarn guide groove that is convenient for neatly collecting the yarn; the winding device is located in the middle of the top of the ring collector, and the linear distance from the center of the ring collector is 5 mm to 800 mm.

Further, the winding transmission device is composed of a power mechanism, a belt, a chain, and a gear transmission mechanism, and is connected with the winding device.

Wherein, the negative electrode solution tank and the negative electrode spinning head and the positive electrode solution tank and the positive electrode spinning head are arranged together in the spinning area below the ring collector, and they are symmetrically arranged left and right with the ring collector, and arranged asymmetrically up and down;

The negative spinning head and the positive spinning head are placed in the spinning area below the ring collector at the same time, the linear distance between the negative spinning head and the ring collector is 20 mm to 200 mm, and the distance between the positive spinning head The straight-line distance of the ring collector is 30 mm to 300 mm; the negative spinning head and the positive spinning head are loaded with high voltage and have the function of emitting solution.

Wherein, the negative electrode spinning head is in the collection area above the ring collector, the negative electrode spinning head is a hollow needle-shaped structure, and the linear distance from the ring collector is 30 mm to 200 mm; the positive electrode spinning head The head is in the spinning area below the ring collector, and the anode spinning head has a disc structure, and the straight-line distance from the ring collector is 50 mm to 300 mm.

Wherein, the negative electrode solution tank in the collection area provides liquid or gas, and negatively charged droplets or negative ion gas are produced through the negative electrode spinning head.

A method for preparing a swivel-type electrospinning nanofiber yarn preparation device, characterized in that it comprises the following steps:

(1), supply liquid to the negative electrode spinning head and the positive electrode spinning head respectively by the negative electrode solution tank and the positive electrode solution tank;

(2), the negative electrode solution tank, the negative electrode spinning head, the positive electrode solution tank, the positive electrode spinning head are respectively connected to the negative electrode and the positive electrode of the high-voltage power supply, and high-voltage static electricity is introduced;

(3) The transmission device of the ring collector drives the rotation of the ring collector;

(4) The solution jets ejected from the positive and negative spinning heads respectively form fibers, and an upward fiber cone is formed on the ring collector;

(5), the fiber cone relies on the rotation of the ring collector to achieve twisting;

(6) The winding transmission device drives the winding device to rotate;

(7) The twisted nanofiber bundle is collected by a winding device.

A method for preparing electrospinning nanofiber yarns with a swivel-type electrospinning nanofiber yarn preparation device, characterized in that it comprises the following steps:

a, dissolving polyvinylidene fluoride-hexafluoropropylene (PVDF) into a mixed solvent of dimethylformamide (DMF) and acetone to prepare a PVDF solution; the formulation of a mixed solvent of dimethylformamide (DMF) and acetone The ratio is 1:1 volume/volume;

b. Pour the PVDF solution into the positive electrode solution tank and the negative electrode solution tank respectively, and the positive electrode spinning head and the negative electrode spinning head are respectively connected to the positive and negative poles of a high voltage power supply;

c. The positive electrode solution tank and the negative electrode solution tank supply liquid to the positive electrode spinning head and the negative electrode spinning head respectively, turn the ring collector, and turn on the high voltage power supply;

d. Freshly spun nanofibers are deposited onto the torus collector ring to form a flat fiber web;

Using a plastic rod to stretch the web, an inverted cone-shaped web is formed. The vertices of the pyramidal fiber web are stretched continuously to form nanofiber yarns;

e. The generated nanofiber yarn is wound by a roller winding device.

Wherein, the voltage of the positive and negative poles of the high-voltage power supply described in step b is 0 to 100 kilovolts;

The positive spinning head adopts a hollow needle structure, and the negative spinning head adopts a hollow needle structure.

The beneficial effects of the utility model:

Differences from prior art electrospinning yarn equipment

1. Collector

The same point: they are all driven by the transmission to rotate in the horizontal direction

The difference: it used to be a conical shape, the bottom is a bell mouth and the top is closed; now it is a ring with a hollow in the middle.

2. Collection method

The same point: the two spinning heads are symmetrically sprayed from the bottom of the collector to the collector respectively

difference:

1. In the past, the two spinning heads sprayed from the horizontal position below the collector to the collector. Now the negative spinning head is closer to the collector, and the positive spinning head is farther away from the collector;

2. The previously ejected nanofibers form fiber webs, twist, and yarn under the conical collector and are collected by the winding device below. Now the ejected nanofibers are above the circular collector The web is formed, twisted, yarn-formed and collected by the upper winder.

3. Spinning head form

difference:

Previously, the two spinning heads were in the form of hollow needles.

Now the two spinning heads can both be in the form of hollow needles, or in the form of springs, screws, discs, etc., and the above forms can be used in combination with the two spinning heads.

The device of the utility model includes two electrospinning heads respectively connected to the positive pole and the negative pole of the DC high-voltage power supply, and the circular collector is driven to rotate by the collector transmission device. The yarn winding device is above the circular collector, and the circular collector The separator separates the spinning area and the collector area into two distinct areas. In the preparation process of nanofiber yarn, the solution jet ejected from the spinning head forms fibers, and an upward fiber cone is formed above the ring collector, and the yarn is pulled out from the apex of the fiber cone, and the uniform twisting is achieved by The rotation of the ring is achieved. The nanofiber yarn is finally collected using a roll winder.

This kind of nanofiber yarn not only expands the application field of the original electrospun nanofiber, but also has its increased mechanical strength and the use of non-knitting technology to meet the needs of industrialized mass production, bringing immeasurable benefits to the development of the entire industry. economic benefits.

Description of drawings

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is a structural schematic diagram of the utility model.

Fig. 3 is a structural schematic diagram of the utility model.

Fig. 4 is a structural schematic diagram of the utility model.

FIG. 5A is a schematic diagram of a partial structure of the ring collector 6 of the present invention.

FIG. 5B is a schematic diagram of a partial structure of the ring collector 6 of the present invention.

Fig. 6A is a top view of the circular collector transmission device 7 of the present invention.

Fig. 6B is a front view of the circular collector transmission device 7 of the present invention.

Fig. 7A is a top view of the circular collector transmission device 7 of the present invention.

Fig. 7B is a front view of the circular collector transmission device 7 of the present invention.

Fig. 8A is a top view of the circular collector transmission device 7 of the present invention.

Fig. 8B is a front view of 7 parts of the circular collector transmission device of the present invention.

Fig. 9 is a top view of the winding transmission device of the present invention.

Fig. 10 is a top view of the winding transmission device of the present invention.

Fig. 11 is a top view of the winding transmission device of the present invention.

Fig. 12A is a partially enlarged view of the spinning head of the present invention.

Fig. 12B is a partially enlarged view of the spinning head of the present invention.

Fig. 12C is a partially enlarged view of the spinning head of the present invention.

Fig. 12D is a partially enlarged view of the spinning head of the present invention.

FIG. 13A is a schematic diagram of the high-voltage power supply of the present invention.

Fig. 13B is a schematic diagram of the high-voltage power supply of the present invention.

Fig. 13C is a schematic diagram of the high voltage power supply of the present invention.

Reference signs:

High-voltage power supply 1, high-voltage static positive terminal 101, high-voltage static negative terminal 102, negative solution tank 2, negative spinning head 3, positive solution tank 4, positive spinning head 5, collector 60, ring collector 6, Collector transmission device 70, ring collector transmission device 7, winding device 8, winding transmission device 9, disc 10, spring structure 11, screw structure 12, hollow needle structure 13, positive pressure power supply 15, negative pressure Power supply 16, positive and negative pressure power supply 17, jet flow I18, jet flow II19, jet flow III20, yarn guiding rod 21, yarn guiding ring 22, tapered nanofiber bundle 23.

Ring collector transmission motor 71, belt pulley 72, belt 73, sprocket wheel 74, chain 75, driving gear 76, driven gear 77.

Winding gear motor 91, driving pulley 92, belt 93, driven pulley 94, driving sprocket 95, chain belt 96, driven sprocket 97.

Collection area 100, spinning area 200.

Detailed ways

Below in conjunction with specific embodiment, the utility model is described further. It should be understood that the following examples are only used to illustrate the utility model but not to limit the scope of the utility model.

Example 1

As shown in Figure 2-4, the swivel type electrospinning nanofiber yarn preparation device includes: high voltage power supply 1, negative electrode solution tank 2, negative electrode spinning head 3, positive electrode solution tank 4, positive electrode spinning head 5, ring Collector 6, ring collector transmission device 7, winding device 8.

The negative and positive stages of the high voltage power supply 1 are respectively connected to the negative spinning head 3 and the positive spinning head 5; the negative solution tank 2 and the positive solution tank 4 supply liquid to the negative spinning head 3 and the positive spinning head 5 respectively.

As shown in FIGS. 2-4 , the collector transmission device 7 is connected to the circular collector 6 and arranged above the positive electrode solution tank 4 and the positive electrode spinning head 5 .

As shown in FIGS. 2-4 , the winding device 8 is connected with the winding transmission device 9 and arranged above the ring collector 6 .

As shown in Figure 12A, the negative electrode spinning head 3 and the positive electrode spinning head 5 are arranged in a circular structure, which is composed of a disc 10 connected with a rod in the middle of the disc 10, and the rod drives the disc 10 to rotate; the diameter of the disc 10 is 5 mm to 300 mm, and the edge thickness of the disc 10 is 0.2 mm to 20 mm. The disk 10 can be made of metal material or non-metal material.

As shown in Figure 12B, the negative electrode spinning head 3 and the positive electrode spinning head 5 are configured as a spring 11 structure, which is composed of a spring 11 wound by a metal wire and connected with a rod in the middle, and the rod drives the spring 11 to rotate; the wire diameter of the spring 11 0.2 mm to 20 mm, the diameter of the spring 11 is 20 mm to 200 mm, and the distance between the wires of the spring 11 is 10 mm to 200 mm.

As shown in Figure 12C, the negative electrode spinning head 3 and the positive electrode spinning head 5 are set to a screw 12 structure, and the screw 12 structure is composed of a helical blade connected with a rod in the middle, and the rod drives the helical blade to rotate; the edge diameter of the helical blade is 0.2 mm to 20 mm, the diameter of the helical blades is 20 mm to 200 mm, and the distance between the helical blades is 10 mm to 200 mm.

As shown in Figure 12D, the negative electrode spinning head 3 and the positive electrode spinning head 5 are arranged in a hollow needle 13-like structure, the hollow needle 13-like structure is composed of a hollow needle and a liquid propeller, and the diameter of the hollow needle 13 is between 0.05 mm and 30mm.

The negative electrode solution tank 2 and the positive electrode solution tank 4 are used for storing solutions and supplying liquid to the negative electrode spinning head 3 and the positive electrode spinning head 5, and are open or closed tank structures. The negative electrode spinning head 3 and the positive electrode spinning head 5 are loaded with high voltage, and have the function of emitting solution.

As shown in Figure 13A, the high-voltage power supply 15 has one output of positive voltage and one output of 0 volts; the high-voltage power supply 16, as shown in Figure 13B, has one output of positive voltage and one output of negative voltage; the high-voltage power supply 17 is shown in Figure 13C , are two power supplies, one output is positive voltage, and the other output is negative voltage.

As shown in Figure 5A and Figure 5B, the ring collector 6 is composed of a hollow circular ring in the middle, which is driven to rotate by the ring collector transmission device 7; the ring collector 6 divides the entire working area into the following The spinning zone 200 and the collecting zone 100 above.

The circular collector 6 has a width of 1 mm to 200 mm, an outer diameter of 30 mm to 300 mm, and an inner diameter of 28 mm to 290 mm; the circular collector 6 is installed horizontally between the spinning area and the collecting area.

The circular collector 6 is driven to rotate by the collector transmission device 7, and the rotation speed is 400 to 2000 revolutions per minute.

Collector transmission device 7 is made up of power unit and belt, chain, gear transmission mechanism and is connected with circular collector 6. And there can be various variations.

Fig. 6A is a top view of the circular collector transmission device 7 of the present invention. Fig. 6B is a front view of the circular collector transmission device 7 of the present invention. In one embodiment, the belt transmission mode of the circular collector transmission 7 is composed of a circular collector transmission motor 71 , a pulley 72 and a belt 73 as shown in FIGS. 6A and 6B .

Fig. 7A is a top view of the circular collector transmission device 7 of the present invention. Fig. 7B is a front view of the circular collector transmission device 7 of the present invention. In a kind of embodiment, the chain drive mode of ring collector transmission 7, as shown in Figure 7A and Figure 7B, is made up of ring collector transmission motor 71, sprocket wheel 74, chain 75.

Fig. 8A is a top view of the circular collector transmission device 7 of the present invention. Fig. 8B is a front view of 7 parts of the circular collector transmission device of the present invention. In one embodiment, the gear transmission is shown in FIG. 8A and FIG. 8B , which consists of a ring collector transmission motor 71 , a driving gear 76 and a driven gear 77 .

Fig. 9 is a top view of the winding transmission device of the present invention. In one embodiment, the belt transmission mode of the winding transmission device 9 , as shown in FIG. 9 , consists of a winding transmission device motor 91 , a driving pulley 92 , a belt 93 and a driven pulley 94 .

Fig. 10 is a top view of the winding transmission device of the present invention. In one embodiment, the chain transmission mode of the winding transmission device 9, as shown in FIG.

Fig. 11 is a top view of the winding transmission device of the present invention. In one embodiment, the gear transmission mode of the winding transmission device 9 , as shown in FIG. 11 , consists of a winding transmission device motor 91 , a driving sprocket 95 and a driven sprocket 97 . The lack of chain strap 96 is omitted.

The winding device 8 is a rotating roller, and the rotating roller is provided with a yarn guide groove that is convenient for neatly collecting the yarn; the winding device is located in the middle of the top of the ring collector 6, and the linear distance from the center of the ring collector 6 is 5 mm ~ 800 mm.

Winding transmission device 9 is made up of power mechanism and belt, chain, gear transmission mechanism and is connected with winding device 8.

Negative electrode solution tank 2 and negative electrode spinning head 3 and positive electrode solution tank 4 and positive electrode spinning head 5 are set together in the spinning area below the ring collector 6, and they are arranged symmetrically with the ring collector 6 left and right, and arranged asymmetrically up and down ;

The negative spinning head 3 and the positive spinning head 5 are placed in the spinning area below the ring collector 6 at the same time. The linear distance between the negative spinning head 3 and the ring collector 6 is 20 mm to 200 mm, and the positive spinning head The linear distance between 5 and ring collector 6 is 30 mm to 300 mm.

The collection area of the negative electrode spinning head 3 above the ring collector 6, the negative electrode spinning head 3 is a hollow needle 13-like structure, and the straight-line distance from the ring collector 6 is 30 mm to 200 mm; the positive electrode spinning head 5 In the spinning area below the ring collector 6 , the anode spinning head has a disc 10 structure, and the linear distance from the ring collector 6 is 50 mm to 300 mm.

Provide liquid or gas to the negative electrode solution tank 2 in the collection area, and produce negatively charged droplets or negative ion gas through the negative electrode spinning head 3 .

A method for preparing a swivel-type electrospinning nanofiber yarn preparation device, comprising the following steps:

1. Supply liquid to the negative electrode spinning head 3 and the positive electrode spinning head 5 through the negative electrode solution tank 2 and the positive electrode solution tank 4 respectively;

2. Connect the negative electrode solution tank 2, the negative electrode spinning head 3, the positive electrode solution tank 4, and the positive electrode spinning head 5 to the negative and positive electrodes of the high-voltage power supply 1 respectively, and introduce high-voltage static electricity;

3. The ring collector transmission device 7 drives the ring collector 6 to rotate;

4. The solution jets ejected from the positive spinning head 5 and the negative spinning head 3 respectively form fibers, and form an upward fiber cone on the ring collector 6;

5. The fiber cone relies on the rotation of the ring collector 6 to achieve twisting;

6. The winding transmission device 9 drives the winding device 8 to rotate;

7. The twisted nanofiber bundle is collected by the winding device 8 .

A method for preparing electrospinning nanofiber yarns of a swivel-type electrospinning nanofiber yarn preparation device, comprising the following steps:

A, dissolving polyvinylidene fluoride PVDF in the mixed solvent of dimethylformamide DMF and acetone, the proportioning of mixed solvent is (1:1 volume/volume) to prepare PVDF solution;

b. The PVDF solution is injected into the positive electrode solution tank 4 and the negative electrode solution tank 2 respectively, and the positive electrode spinning head 5 and the negative electrode spinning head 3 are respectively connected to the positive and negative poles of a high voltage power supply 1;

c. The positive electrode solution tank 4 and the negative electrode solution tank 2 supply liquid to the positive electrode spinning head 5 and the negative electrode spinning head 3 respectively, turn the ring collector 6, and turn on the high voltage power supply 1;

d, newly spun nanofibers are deposited into the 6 rings of the ring collector to form a flat fiber web;

Using a plastic rod to stretch the web, an inverted cone-shaped web is formed. The vertices of the pyramidal fiber web are stretched continuously to form nanofiber yarns;

e. The generated nanofiber yarn is wound by a rotary roller winding device 8 .

In step b, the positive and negative poles of the high-voltage power supply 1 are loaded with a high voltage of 0-100 kV;

The positive pole spinning head 5 adopts a hollow needle 13-like structure, and the negative pole spinning head 3 adopts a hollow needle 13-like structure.

Features of the utility model:

1. Electrospinning principle to prepare nanofibers;

2. The nanofiber is collected by the ring collector 6 and converted into yarn under the action of the winding device 8;

3. Adjustable yarn twist;

4. The spinneret comprises at least one positive pole spinneret 5 and one negative pole spinneret 3;

5. The positive spinning head 5 and the negative spinning head 3 are on one side of the ring collector 6;

6. The positive spinning head 5, the negative spinning head 3 and the winding device 8 are respectively located on the upper and lower sides of the ring collector 6;

7. The positive spinning head 5 and the negative spinning head 3 can be driven by the same high-voltage power supply 1, or can be driven separately by their own high-voltage power supply 1;

8. Nanofibers are deposited on the ring collector 6 from one side of the negative pole spinning head 3 and the positive pole spinning head 5, and form a cone at the opposite end, so as to avoid the damage caused by the direct deposition of the nanofibers on the yarn. The resulting hairiness problem.

9. The negative spinning head 3 and the positive spinning head 5 can spin the same fiber or different fiber materials;

10. The fineness of the fiber can be adjusted according to the concentration of the polymer.

The specific implementation of the utility model has been described above, but the utility model is not limited thereto, as long as it does not deviate from the purpose of the utility model, the utility model can also have various changes.

Claims (16)

1. A swivel-type electrospinning nanofiber yarn preparation device, characterized in that it includes: a high-voltage power supply (1), a negative electrode solution tank (2), a negative electrode spinning head (3), a positive electrode solution tank (4), a positive electrode spinning Wire head (5), ring collector (6), ring collector transmission device (7), winding device (8); The negative and positive stages of the high-voltage power supply (1) are respectively connected to the negative spinning head (3) and the positive spinning head (5); The negative electrode solution tank (2) and the positive electrode solution tank (4) supply liquid to the negative electrode spinning head (3) and the positive electrode spinning head (5) respectively; The collector transmission (7) is connected to the ring collector (6), and is arranged above the positive electrode solution tank (4) and the positive electrode spinning head (5); The winding device (8) is connected with the winding transmission device (9) and arranged above the ring collector (6). 2. The swivel-type electrospinning nanofiber yarn preparation device according to claim 1, characterized in that: the negative spinning head (3) and the positive spinning head (5) are arranged in a circular structure, formed by a circle The disc (10) is connected with the rod in the middle of the disc (10), and the rod drives the disc (10) to rotate; the diameter of the disc (10) is 5 mm to 300 mm, and the thickness of the edge of the disc (10) is 0.2 mm ~20 mm. 3. The swivel type electrospinning nanofiber yarn preparation device according to claim 1, characterized in that: the negative spinning head (3) and the positive spinning head (5) are arranged as spring (11) structures, The spring (11) wound by metal wire is connected with the rod in the middle, and the rod drives the spring (11) to rotate; the wire diameter of the spring (11) is 0.2 mm to 20 mm, and the spring (11) The diameter is 20 millimeters to 200 millimeters, and the spacing between the spring (11) wires is 10 millimeters to 200 millimeters. 4. The swivel type electrospinning nanofiber yarn preparation device according to claim 1, characterized in that: the negative electrode spinning head (3) and the positive electrode spinning head (5) are set to a screw (12) structure, The structure of the screw (12) is composed of a helical blade connected with a rod in the middle, and the rod drives the helical blade to rotate; the edge diameter of the helical blade is 0.2 mm to 20 mm, and the diameter of the helical blade is 20 mm to 200 mm. mm, and the distance between the helical blades is 10 mm to 200 mm. 5. The swivel-type electrospinning nanofiber yarn preparation device according to claim 1, characterized in that: the negative electrode spinning head (3) and the positive electrode spinning head (5) are arranged as hollow needles (13) structure, the hollow needle (13)-like structure is composed of a hollow needle head and a liquid propeller, and the diameter inside the head of the hollow needle (13) is 0.05 mm to 30 mm. 6. The swivel-type electrospinning nanofiber yarn preparation device according to claim 1, characterized in that: the negative spinneret (3) and the positive spinneret (5) are loaded with high voltage, and have the ability to convert the solution into nanofibers. 7. The swivel type electrospinning nanofiber yarn preparation device according to claim 1, characterized in that: the negative electrode solution tank (2) and the positive electrode solution tank (4) are used to store the solution and supply the negative electrode spinning head (3) and the cathode spinning head (5) are supplied with liquid, and have an open or closed tank structure. 8. The swivel-type electrospinning nanofiber yarn preparation device according to claim 1, characterized in that: the ring collector (6) is composed of a hollow circular ring in the middle, and the circular ring The collector transmission (7) is driven to rotate; the ring collector (6) divides the entire working area into the spinning area (200) below and the collecting area (100) above. 9. The swivel type electrospinning nanofiber yarn preparation device according to claim 8, characterized in that: the circular collector (6) has a width of 1 mm to 200 mm and an outer diameter of 30 mm to 300 mm , the internal diameter is 28 mm to 290 mm; the circular collector (6) is horizontally installed in the middle of the spinning area and the collecting area. 10. The swivel type electrospinning nanofiber yarn preparation device according to claim 8, characterized in that: the circular collector (6) is driven to rotate by the collector transmission (7), and the rotation speed is 400 to 2000 rpm. 11. The swivel-type electrospinning nanofiber yarn preparation device according to claim 10, characterized in that: the collector transmission (7) is composed of a power unit, belts, chains, gears and other transmission mechanisms and is connected with a circle Shape collector (6) is connected. 12. The swivel-type electrospinning nanofiber yarn preparation device according to claim 1, characterized in that: the winding device (8) is a rotating roller, and the rotating roller is provided with guides to facilitate the neat collection of yarns. Yarn trough; the winding device is located in the middle of the top of the ring collector (6), and the linear distance from the center of the ring collector (6) is 5 millimeters to 800 millimeters. 13. The swivel type electrospinning nanofiber yarn preparation device according to claim 12, characterized in that: the winding transmission device (9) is composed of a power unit and transmission mechanisms such as belts, chains, and gears and is connected with the coil Connect around device (8). 14. The swivel type electrospinning nanofiber yarn preparation device according to claim 1, characterized in that: the negative electrode solution tank (2) and the negative electrode spinning head (3) and the positive electrode solution tank (4) positive electrode spinning The yarn heads (5) are arranged together in the spinning area below the ring collector (6), and they are symmetrically arranged left and right with the ring collector (6), and asymmetrically arranged up and down; The negative electrode spinning head (3) and the positive electrode spinning head (5) are placed on the spinning area below the ring collector (6) at the same time, and the negative electrode spinning head (3) is separated from the straight line of the ring collector (6). The distance is between 20 mm and 200 mm, and the linear distance between the positive spinning head (5) and the ring collector (6) is between 30 mm and 300 mm. 15. The swivel type electrospinning nanofiber yarn preparation device according to claim 5, characterized in that: the collection area of the negative electrode spinning head (3) above the circular collector (6), the negative electrode The spinning head (3) is a hollow needle (13)-like structure, and the linear distance from the ring collector (6) is 30 mm to 200 mm; In the spinning area below, the anode spinning head is a disc (10) structure, and the linear distance from the ring collector (6) is 50 mm to 300 mm. 16. The swivel-type electrospinning nanofiber yarn preparation device according to any one of claims 1, 14, 15, characterized in that: the negative electrode solution tank (2) in the collection area provides liquid or gas, through which The negative electrode spinning head (3) produces negatively charged droplets or negative ion gas.