Needleless electrostatic spinning solution box

Abstract

According to the needleless electrostatic spinning solution box, a solution storage tank (03) is arranged in a solution box body, when an electrostatic spinning electrode (04) rotates along with a rotating shaft of the electrostatic spinning electrode (04), the head of the electrode can enter the lower portion of the liquid level from the upper portion of the liquid level of the solution storage tank (03) or rotate to the upper portion of the liquid level from the lower portion of the liquid level; the bottom of the liquid storage tank (03) is provided with a liquid homogenizing tank (01) which is in one-way communication with the liquid storage tank, and a spinning solution in the liquid homogenizing tank (01) comes from a liquid supply pipe (07) connected with the liquid homogenizing tank (01); a scraping plate (05) capable of scraping a residual solution on the electrode head of the rotating electrostatic spinning electrode (04) is arranged at the bottom or the wall of the liquid storage tank (03); residual solution scraped by the scraping plate (05) is collected in a liquid discharging groove (09), and the liquid discharging groove (09) is connected with a liquid pumping pipe (08) capable of discharging the collected solution.

Description

Technical Field

[0001] The utility model relates to a needleless electrospinning solution box. Background Art

[0002] At present, due to its extremely high production efficiency and high-quality uniformity, needleless electrospinning is gradually replacing needle electrospinning equipment and becoming the mainstream equipment for electrospinning industrialization at home and abroad.

[0003] In the prior art, most needleless spinning equipment needs to continuously supply liquid to solve the problem of solvent volatilization in the polymer due to the solution box sealing problem. The traditional method is to circulate the solution by feeding liquid at one end and pumping liquid at the other end. However, since the electrode structure is composed of steel wires, it cannot push the solution to circulate when rotating, and it is impossible to ensure the mixing of new and old solutions. This causes the solution in the solution box to have different viscosities at different positions, ultimately resulting in a big problem with the uniformity of the product.

[0004] In addition, continuous electrospinning will cause the solvent to volatilize, forming a film on the surface of the electrode, which will affect the conductivity of the electrode and the quality of the nanofibers. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the above deficiencies of the prior art and provide a needleless electrospinning solution box that can effectively improve the uniformity of the product and the quality of the nanofibers.

[0006] The technical problem to be solved can be implemented by the following technical solutions.

[0007] A needleless electrospinning solution box, characterized in that a liquid storage tank (03) is provided inside the box body of the solution box. When the electrospinning electrode (04) rotates along its rotating shaft, the head of the electrode can enter from above the liquid level of the liquid storage tank (03) into below the liquid level, or transfer from below the liquid level to above the liquid level; a liquid equalizing tank (01) that is unidirectionally communicated with the liquid storage tank is provided at the bottom of the liquid storage tank (03), and the spinning solution in the liquid equalizing tank (01) comes from a liquid supply pipe (07) connected thereto; a scraper (05) for scraping the residual solution on the head of the rotating electrospinning electrode (04) is provided at the bottom or the tank wall of the liquid storage tank (03); the residual solution scraped by the scraper (05) is collected in a drainage tank (09), and the drainage tank (09) is connected with a liquid extraction pipe (08) that can discharge the collected solution outside.

[0008] Further, the solution in the liquid equalizing tank (01) is unidirectionally transported to the liquid storage tank (03) through a nozzle.

[0009] Further, the nozzle is positioned on a liquid equalizing plate (02), and the liquid equalizing plate (02) forms a partition separating the liquid storage tank (03) from the liquid equalizing tank (01).

[0010] Preferably, the liquid storage tank (03) has a cuboid structure or a semi-cylindrical structure.

[0011] Furthermore, the residual solution scraped by the scraper (05) is guided along the deflector plate arranged obliquely on the scraper to the drain tank (09).

[0012] Preferably, the scraper (05) is a soft silicon scraper.

[0013] Furthermore, a cover plate (06) is provided on the top of the liquid storage tank (03), and an avoidance hole (10) is provided on the cover plate to facilitate the electrostatic spinning electrode to enter or leave the liquid storage tank when rotating along its rotating shaft.

[0014] The needleless electrostatic spinning solution box adopting the above technical solution has the following characteristics and beneficial effects:

[0015] 1. By covering the plate, the area where the solution contacts the air can be isolated by more than 85%, thereby reducing the volatilization of the solvent in the polymer, reducing the change of the polymer viscosity, and improving the product quality.

[0016] 2. It can supply liquid evenly, ensure the consistency of the solution viscosity near the electrode of the specified length, and thus ensure the uniformity of the electrospun nanofibers.

[0017] 3. It can timely clean the residual liquid generated on the surface of the electrode after spinning, improve the spinning quality, and enable it to spin for a long time with high quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a needleless electrostatic spinning solution box with uniform liquid supply provided by the present invention;

[0019] Figure 2 It is a sectional view of the needleless electrostatic spinning solution box of the present invention;

[0020] In the figure:

[0021] 01 - liquid equalizing tank; 02 - liquid equalizing plate; 03 - liquid storage tank; 04 - electrostatic spinning electrode; 05 - scraper; 06 - cover plate; 07 - liquid supply pipe; 08 - liquid extraction pipe; 09 - drain tank; 10 - avoidance hole; 11 - box body. DETAILED DESCRIPTION OF THE INVENTION

[0022] The following further details the specific embodiments of the present invention with reference to the drawings.

[0023] Referring to Figure 1 and Figure 2 as shown, the present invention provides a needleless electrostatic spinning solution box, and a cover plate 06 is added to the solution box (see Figure 1In the right part of the middle, by designing a reasonable internal liquid supply pipeline and liquid extraction pipeline, the solution enters the liquid equalizing tank 01 at the bottom of the electrospinning electrode 04, and then evenly flows into the liquid storage tank 03 through the liquid equalizing plate 02 on the liquid equalizing tank 01. After being stirred by the rotation of the electrospinning electrode 04, the residual liquid on the surface of the electrospinning electrode 04 is cleaned by the scraper 05 after spinning. The cleaned residual liquid converges to the drain tank 09 through the ramp flow channel and is then centrally extracted by the liquid extraction pipe 08.

[0024] The specific structure is as follows:

[0025] A liquid storage tank 03 is provided inside the box body 11 of the solution box. When the electrospinning electrode 04 rotates along with its rotating shaft, the electrode head can enter from above the liquid surface of the liquid storage tank 03 into the lower part of the liquid surface, or transfer from the lower part of the liquid surface to above the liquid surface; a cover plate 06 is provided on the top of the liquid storage tank 03, and there are openings on the cover plate according to the shape of the electrospinning electrode head (that is, avoidance holes 10 are provided on the cover plate to facilitate the electrospinning electrode 04 to enter or leave the liquid storage tank 03 when rotating along with its rotating shaft). The liquid storage tank 03 is of a cuboid structure or a semi-cylindrical structure; a liquid equalizing tank 01 communicated with it is provided at the bottom of the liquid storage tank 03, and the spinning solution in the uniform groove 01 comes from the liquid supply pipe 07 connected to it. The liquid supply pipe 07 is a rubber pipe, one end is connected to a liquid supply device with a power device, and the other end is connected to the liquid equalizing tank 01 inside the solution box, and liquid is transported to the liquid equalizing tank through power. The liquid equalizing tank 01 is a hard or soft pipeline, which can store a part of the solution, and can supply liquid to the liquid storage tank 03 through a group of liquid supply nozzles (spray heads) with different apertures on the side towards the liquid storage tank. Referring to the attached drawings, these spray heads are arranged on the liquid equalizing plate 02 that separates or connects the liquid storage tank and the liquid equalizing tank. That is, the solution in the liquid storage tank 03 enters the liquid storage tank 03 evenly from the liquid equalizing tank 01 through the liquid supply nozzles (spray heads) on the liquid equalizing plate 02. The nozzles of the liquid supply nozzles face the liquid equalizing tank 01, and the nozzles can be circular, square, polygonal or strip-shaped. The distance between the nozzles is from 0.5 mm to 500 mm, and the diameter of the nozzles is from 0.05 mm to 50 mm. The nozzles can be equidistant or non-equidistant.

[0026] A scraper 05 for cleaning is designed at the bottom or side wall of the liquid storage tank 03 according to the shape of the electrospinning electrode 04. When the electrospinning electrode 04 rotates during operation, the electrode head is frictionally cleaned with the cleaning scraper 05, so that the residual liquid on the electrospinning electrode 04 after spinning is cleaned, and then it is dipped in a new solution for spinning. On the other hand, the residual liquid scraped by the scraper 05 is guided to the drain tank 09 along the guide plate on its inclined surface. That is, the scraper 05 scrapes the excess solution on the surface of the electrospinning electrode sheet after spinning towards the drain tank.

[0027] The squeegee 05 can be a row of flexible silicon squeegees. The protruding part of the flexible squeegee 05 rubs against the electrospinning electrode 04. The distance between the protruding part and the electrospinning electrode 04 (equivalent to the length of the overlapping part of the two) is from 0 to 10 mm, and the shape can be flat, arc-shaped or other shapes according to the shape of the electrospinning electrode 04. The flexible squeegee 05 can be a row or multiple rows.

[0028] The bottom of the liquid drainage tank slopes from both sides to the middle. The excess solution flows from the slope to the middle of the liquid drainage tank and is then discharged through the liquid suction pipe 08. The bottom of the liquid drainage tank 09 between two adjacent electrospinning wire electrodes 04 in the box body 11 is a slope, which can slope unidirectionally to one direction, or slope from both ends to the middle or from the middle to both ends. The liquid suction port of the liquid suction pipe 08 is placed at the lowest point of the slope. The liquid suction pipe 08 can also be placed on the cover plate of the solution box, and the position of the liquid suction port ranges from the top to the bottom of the cover plate, with the direction facing down or lying flat. As shown in the figure, the liquid drainage tank 09 has an inverted trapezoidal structure, and the two side surfaces at the ends of the inverted trapezoid form a diversion surface (inclined surface) for the squeegees corresponding to different spinning electrodes in two adjacent liquid storage tanks 03.

[0029] The number of liquid storage tanks 03 in the solution box can be set to multiple.

[0030] The liquid supply pipe 07 can be a single pipe or a trough with a lid.

Claims

1. A needle-free electrospinning solution box, characterized in that: A liquid storage tank (03) is provided in the solution box body, and when the electrostatic spinning electrode (04) rotates with its rotating shaft, the electrode head can enter the lower part of the liquid surface of the liquid storage tank (03) from the upper part of the liquid surface, or rotate from the lower part of the liquid surface to the upper part of the liquid surface; a liquid equalizing tank (01) which is unidirectionally connected to the liquid storage tank is provided at the bottom of the liquid storage tank (03), and the spinning solution in the liquid equalizing tank (01) comes from a liquid supply pipe (07) connected to it; a scraper (05) which can scrape the residual solution of the electrode head of the rotating electrostatic spinning electrode (04) is provided at the bottom or the tank wall of the liquid storage tank (03); the residual solution scraped by the scraper (05) is collected in a liquid drainage tank (09), and the liquid drainage tank (09) is connected to a liquid extraction pipe (08) which can discharge the collected solution.

2. The needle-free electrospinning solution box according to claim 1, characterized in that: The solution in the liquid equalizing tank (01) is transported to the liquid storage tank (03) in one direction through a nozzle.

3. The needle-free electrospinning solution box according to claim 2, characterized in that: The nozzle is positioned on a liquid balancing plate (02), and the liquid balancing plate (02) forms a partition separating the liquid storage tank (03) and the liquid balancing tank (01).

4. The needle-free electrospinning solution box according to claim 3, characterized in that: The liquid storage tank (03) is in a rectangular parallelepiped structure or a semi-cylindrical structure.

5. The needle-free electrospinning solution box according to claim 1, characterized in that: The residual solution scraped by the scraper (05) is guided to the drainage trough (09) along the guide plate arranged in an inclined surface.

6. The needle-free electrospinning solution box according to claim 5, characterized in that: The scraper (05) is a soft silicon scraper.

7. The needle-free electrospinning solution box according to claim 1, characterized in that: A cover plate (06) is provided on the top of the liquid storage tank (03), and an escape hole (10) is provided on the cover plate for facilitating the electrostatic spinning electrode to enter or leave the liquid storage tank when the electrostatic spinning electrode rotates with its rotating shaft.

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