Semi-closed nozzle and electrostatic spinning machine

Abstract

The utility model relates to a semi-closed spray head and an electrostatic spinning machine, comprising a base covered with a protective shell, and an accommodating cavity enclosed between the base and the protective shell; the spray head mechanism comprises a spray head body, a spray head cover and a liquid supply pipe, the spray head body is arranged on the base and located in the containing cavity, a first opening is formed in the spray head body, the spray head cover covers the first opening, and a liquid spraying space is defined by the spray head body and the spray head cover; one end of the liquid supply pipe is externally connected to the liquid supply unit, and the other end of the liquid supply pipe penetrates through the protective shell and the nozzle cover and extends into the liquid spraying space; and an electrode wire. Through the arrangement, stable supply and uniform wrapping of a solution are realized. And meanwhile, the semi-closed spray head also solves the problems of large solution waste and too fast solvent evaporation.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrostatic spinning field especially is a kind of semi-closed nozzle and electrostatic spinning machine. BACKGROUND

[0002] In the electrospinning technology field, needleless electrospinning nozzle is concerned due to its unique structure and simple operation. However, in practical application, needleless nozzle often faces problems such as unstable liquid supply, large waste of solution and nozzle blockage caused by too fast solvent evaporation. These problems not only affect the quality of spinning fibers, but also increase production cost, limiting the wide application of electrospinning technology.

[0003] As mentioned in the technical solution of Chinese patent with publication number "CN221166862U" and the name "electrospinning supply device", the solution includes a supply device main body, a supply device side plate, a supply device main body stopper, a supply device side plate stopper and a supply pipe; the supply device side plate is inserted into the supply device main body and fixed with the supply device main body by bolts; the supply device main body stopper is inserted into the supply device main body and fixed with the supply device main body; the supply device side plate stopper is inserted into the supply device side plate and fixed with the supply device side plate; the supply pipe is connected and fixed with the supply device main body above the supply device main body. The invention realizes stable control of liquid amount of filament electrode and uniform supply. The solution has made significant progress in improving the stability of liquid supply. However, its performance in reducing solvent evaporation rate and responding to solution flow interruption incidents still needs to be improved. In addition, the structural design of the device is relatively complex, resulting in high manufacturing cost. Therefore, it is necessary to further innovate and optimize it. UTILITY MODEL CONTENT

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the nozzle of the electrospinning machine in the prior art still needs to be improved in reducing solvent evaporation rate and responding to solution flow interruption incidents, so as to provide a semi-closed nozzle.

[0005] To solve the above technical problems, the utility model provides a semi-closed nozzle, which comprises:

[0006] A base is provided with a protective shell, and a containing cavity is enclosed between the base and the protective shell;

[0007] A nozzle mechanism comprises a nozzle body, a nozzle cover and a liquid supply pipe, the nozzle body is arranged in the base and located in the containing cavity, the nozzle body is provided with a first opening, the nozzle cover is arranged on the first opening, and the nozzle body and the nozzle cover enclose a liquid spraying space, one end of the liquid supply pipe is connected to a liquid supply unit, and the other end extends into the liquid spraying space through the protective shell and the nozzle cover;

[0008] An electrode wire is provided through the outer housing, the nozzle body, and the output end of the liquid supply pipe, which has a first through hole with a size larger than the electrode wire and through which the electrode wire passes.

[0009] In an embodiment of the utility model, the base is provided with a groove adapted to the protective shell, and the protective shell is provided with a second opening on the side close to the groove.

[0010] In an embodiment of the utility model, the size of the protective shell is larger than that of the nozzle body, and an inner space is enclosed between the protective shell and the nozzle body, and the input end of the liquid supply pipe is arranged in the inner space.

[0011] In an embodiment of the utility model, the liquid supply pipe comprises a flat portion and a vertical portion with their ends communicating with each other, one end of the flat portion away from the vertical portion is configured as the input end, and one end of the vertical portion away from the flat portion is configured as the output end, the flat portion is arranged in the inner space, and the vertical portion extends through the cover to the communication space.

[0012] In an embodiment of the utility model, the end of the vertical portion is a sealed end, and the first through hole is arranged on the vertical portion close to the sealed end in the horizontal direction.

[0013] In an embodiment of the utility model, the flat portion is provided with a buckle, and the buckle is detachably connected to the nozzle cover through a screw.

[0014] In an embodiment of the utility model, the inner wall of the protective shell is provided with a clearance groove adapted to the horizontal portion.

[0015] In an embodiment of the utility model, the bottom of the nozzle body is provided with a threaded hole, the base is provided with a second through hole corresponding to the threaded hole, the protective shell is provided with a third through hole for the electrode wire to pass through, the nozzle body is provided with a fourth through hole for the electrode wire to pass through, and the size of the third through hole is larger than the size of the first through hole and the fourth through hole.

[0016] In an embodiment of the utility model, a liquid return pipe is further provided, the liquid return pipe passes through the second through hole and extends to the threaded hole, the end of the liquid return pipe is provided with external threads adapted to the threaded hole, and the liquid return pipe is communicated with the liquid ejection space.

[0017] The utility model further provides an electrospinning machine comprising the above-mentioned semi-closed nozzle.

[0018] Compared with the prior art, the above technical scheme of the utility model has the following advantages:

[0019] The utility model discloses a half -closed shower head, realized linear metal electrode silk liquid -wrapping amount stable even, reduce the evaporation of solvent when using simultaneously. The core feature of the half -closed shower head lies in, through the construction of a half -closed cavity structure, the linear metal electrode is ingeniously placed in, and through the accurate flow channel design, realized the stable supply and even cover of solution. Meanwhile, the half -closed shower head also solved the problem of solution waste and solvent evaporation too fast. Through adopting the half -closed cavity structure, the inside of shower head forms a relatively closed environment, effectively reduces the contact area of solvent and outside air, thereby slow down the evaporation rate of solvent. In the liquid -wrapping amount of linear metal electrode, through the accurate control of the flow of solution, makes the electrode can even adsorb and wrap the solution flowing, forms a continuous liquid film. In addition, the half -closed shower head also shows great convenience in dismounting, cleaning and electrode silk's installation. The shower head shell adopts the modularization design, and the parts are connected through the standardized interface, makes the dismounting and cleaning process more simple and fast. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the drawings, the utility model is further detailed, wherein

[0021] Figure 1 It is the structure schematic diagram of the half -closed shower head of the utility model;

[0022] Figure 2 It is the sectional view of the half -closed shower head of the utility model Figure 1 ;

[0023] Figure 3 It is the sectional view of the half -closed shower head of the utility model Figure 2 ;

[0024] Figure 4 It is the structure schematic diagram of the liquid supply pipe and electrode silk of the utility model.

[0025] Description of the drawings reference sign: 1, protective shell;101, base;102, third through hole;103, recess;104, second through hole;105, avoiding groove;2, shower head body;201, liquid supply pipe;202, liquid return pipe;203, screw;204, buckle;205, fourth through hole;206, first through hole;207, liquid spraying space;208, shower head cover;209, screw hole;3, electrode silk. DETAILED DESCRIPTION

[0026] The utility model is further explained in connection with the drawings and specific embodiment, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0027] Embodiment 1

[0028] With reference to Figures 1-4 As shown in the figure, the utility model relates to a kind of semi-closed shower nozzles, comprising:

[0029] Base 101, it is equipped with protective shell 1, the base 101 and protective shell 1 are enclosed with containing cavity between;

[0030] Shower nozzle mechanism, it includes: shower nozzle body 2, shower nozzle cover 208, liquid supply pipe 201, the shower nozzle body 2 is set to base 101 and is located in containing cavity, the first opening is opened in the shower nozzle body 2, the shower nozzle cover 208 is covered in first opening, the shower nozzle body 2 and shower nozzle cover 208 are enclosed and form with spray liquid space 207, one end of the liquid supply pipe 201 is connected to liquid supply unit and the other end passes through protective shell 1 and shower nozzle cover 208 and extends to spray liquid space 207 inside;

[0031] Electrode wire 3, it is threaded in outer shell, shower nozzle body 2 and the output end of liquid supply pipe 201 and passes through spray liquid space 207, the liquid supply pipe 201 is opened with the first through-hole 206 of size greater than electrode wire 3 and for electrode wire 3 to pass.

[0032] A kind of semi-closed shower nozzle described in the utility model, liquid supply unit transports liquid to spray liquid space 207 inside by liquid supply pipe 201, high voltage is applied on electrode wire 3, in the process of spraying, containing cavity provides stable environment, linear metal electrode is placed in it, and realizes the stable supply and uniformly wraps of solution by flow passage design, solution is entered into output end by its output end from input pipe, and by opening first through-hole 206 in liquid supply pipe 201, first through-hole 206 size is greater than electrode wire 3, so electrode wire 3 does not directly contact with electrode wire 3, and, because of the gap between first through-hole 206 and the surface of electrode wire 3, solution can be evenly wrapped along the surface of electrode wire 3, at the same time, semi-closed shower nozzle also solves the problem of large waste amount of solution and solvent evaporation too fast.

[0033] With reference to Figure 2 As shown in the figure, the base 101 is opened with the recess 104 adapted to protective shell 1, depth is 1mm, the side of protective shell 1 close to recess 104 is equipped with second opening, the close cooperation between recess 104 and protective shell 1 and the sealing design at second opening, effectively improve the sealing property of shower nozzle, prevent the impurities such as dust, moisture of outside from entering containing cavity, cause pollution and damage to the components inside shower nozzle.Outside, also reduce the volatilization and leakage of liquid in the inside of shower nozzle, improve the utilization of liquid and the service life of shower nozzle.

[0034] With reference to Figure 2As shown, the size of the protective shell 1 is greater than the nozzle body 2, and an inner space is enclosed between the protective shell 1 and the nozzle body 2, and the input end of the liquid supply pipe 201 is arranged in the inner space, and the external liquid supply unit supplies liquid to the inside of the nozzle through the liquid supply pipe 201. The input end of the liquid supply pipe 201 is located in the inner space between the protective shell 1 and the nozzle body 2, and the liquid can smoothly enter the liquid supply pipe 201 from the liquid supply unit. Then, the liquid passes through the protective shell 1 and the nozzle cover 208 along the liquid supply pipe 201, and finally enters the liquid spray space 207 enclosed by the nozzle body 2 and the nozzle cover 208, and supplies liquid at the first through hole 206.

[0035] Referring to Figure 4 As shown, the liquid supply pipe 201 includes a flat portion and a vertical portion with their ends connected to each other, thereby forming an L-shaped pipe, and the end of the flat portion away from the vertical portion is configured as an input end, and the end of the vertical portion away from the flat portion is configured as an output end, and the flat portion is arranged in the inner space, and the vertical portion extends through the cover to the communication space, and when the nozzle is working, the external liquid supply unit supplies liquid to the input end of the flat portion of the liquid supply pipe 201. The liquid first enters the flat portion, and after preliminary buffering and guiding in the flat portion, it flows smoothly to the vertical portion. The vertical portion transports the liquid downward, through the cover and into the communication space.

[0036] Referring to Figure 4 As shown, the end of the vertical portion is a sealed end, and the first through hole 206 is arranged in the vertical portion near the sealed end in a horizontal direction, and the liquid then flows into the vertical portion. Since the lower end of the vertical portion is a sealed end, the liquid cannot flow out of the lower end, and rises to the first through hole 206, and at the same time, the electrode wire 3 passes through the first through hole 206, so that the electrode wire 3 can uniformly cover the solution, and due to the presence of surface tension, the solution will adhere to the gap between the electrode wire 3 and the first through hole 206, uniformly coating the electrode wire 3 on the side, and the liquid supply unit supplies liquid, thereby continuously generating fibers.

[0037] Referring to Figures 1-2 As shown, the flat portion is provided with a buckle 204, which is detachably connected to the nozzle cover 208 by a screw 203. During assembly of the nozzle, first place the flat portion of the liquid supply pipe 201 in the appropriate position, then place the buckle 204 on the flat portion, and then preliminarily position the buckle 204 on the corresponding mounting part of the nozzle cover 208. Then, the buckle 204 is tightly connected to the nozzle cover 208 by the screw 203, so that the flat portion of the liquid supply pipe 201 is firmly fixed on the nozzle cover 208.

[0038] Referring to Figure 2As shown, the inner wall of the protective shell 1 is provided with a horizontal part avoiding groove 105, the length of the avoiding groove 105 is 15-20mm, which is convenient for the liquid supply pipe 201 to be placed and avoided, the avoiding groove 105 provides a safe and stable placing environment for the liquid supply pipe 201, ensures the normal supply of liquid and the stable work of the nozzle, optimizes the space occupancy rate, and also plays a positioning role on the liquid supply pipe 201.

[0039] The bottom of the nozzle body 2 is provided with a threaded hole 209, the base 101 is provided with a second through hole 104 corresponding to the threaded hole 209, the diameter of the second through hole 104 is between 5-8mm, the protective shell 1 is provided with a third through hole 102 for the electrode wire 3 to pass through, the diameter of the third through hole 102 is 2mm, the nozzle body 2 is provided with a fourth through hole 205 for the electrode wire 3 to pass through, the diameters of the first through hole 206 and the fourth through hole 205 are 1mm, the size of the third through hole 102 is greater than the size of the first through hole 206 and the fourth through hole 205, and the nozzle body 2 is placed on the base 101, so that the threaded hole 209 at the bottom of the nozzle body 2 is aligned with the second through hole 104 on the base 101, which can provide a downward waste liquid backflow channel.

[0040] Referring to Figure 3 As shown, the liquid return pipe 202 passes through the second through hole 104 and extends to the threaded hole 209, the end of the liquid return pipe 202 is provided with external threads matched with the threaded hole 209, the liquid return pipe 202 is connected to the liquid spraying space 207, part of the liquid in the liquid space will be sprayed in a predetermined manner, and the other part of the liquid that is not sprayed or the excess liquid will flow to the opening of the liquid return pipe 202 under the action of gravity and the pressure in the liquid spraying space 207. Since the liquid return pipe 202 is connected to the liquid spraying space 207, the liquid enters the inside of the liquid return pipe 202 through the opening of the liquid return pipe 202, then flows downward along the liquid return pipe 202, passes through the second through hole 104 on the base 101, and is finally recycled to a designated position through the other end of the liquid return pipe 202, and the liquid return pipe 202 is connected to the threaded hole 209 at the bottom of the nozzle body 2 in a threaded manner, which can also lock the nozzle body 2.

[0041] Embodiment 2

[0042] The embodiment provides an electrostatic spinning machine, which comprises a semi-closed nozzle as described in embodiment 1.

[0043] The electrostatic spinning machine provided by the embodiment includes a semi-closed nozzle, a high-voltage power supply system, a liquid supply system, and a fiber collection device. The semi-closed nozzle provides a stable liquid environment and precise liquid supply and spraying control for electrostatic spinning. The liquid supply system is responsible for providing stable liquid raw material supply for the semi-closed nozzle. It includes a liquid storage container, a liquid delivery pump, and connecting pipelines. The liquid storage container is used to store the liquid raw material required for electrostatic spinning, and the liquid delivery pump delivers the liquid from the storage container to the input end of the liquid supply pipe 201 of the semi-closed nozzle through the connecting pipeline. The liquid delivery pump can accurately control the flow and pressure of the liquid, ensuring that the nozzle can obtain stable and appropriate liquid supply to meet different electrostatic spinning process requirements. The high-voltage power supply system provides high voltage for the electrode wire 3. This system can output stable high voltage and can adjust the voltage according to different liquid raw materials and spinning process requirements. The fiber collection device is used to collect the electrostatic spinning fibers sprayed from the nozzle. Various forms can be used, such as a rotating collector, a flat plate collector, or a drum collector. Different forms of collection devices are suitable for different application scenarios and fiber collection requirements. For example, the rotating collector can make the fibers more evenly distributed during the collection process, suitable for preparing large-area, high-uniformity fiber membranes; the flat plate collector is suitable for collecting fiber structures with specific shapes or patterns.

[0044] Obviously, the above embodiments are only examples for the purpose of clarity, and are not limited to the embodiments. Based on the above description, those skilled in the art can make other different forms of changes or modifications. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. A semi-enclosed showerhead, characterized by, The utility model relates to a semi-closed shower nozzle, comprising: a base covered with a protective shell, a containing cavity being enclosed between the base and the protective shell; a nozzle mechanism comprising a nozzle body, a nozzle cover, and a liquid supply pipe, the nozzle body being arranged on the base and located in the containing cavity, the nozzle body being provided with a first opening, the nozzle cover being arranged on the first opening, the nozzle body and the nozzle cover enclosing a liquid spraying space, one end of the liquid supply pipe being connected to a liquid supply unit and the other end extending through the protective shell and the nozzle cover and into the liquid spraying space; an electrode wire being arranged through the outer shell, the nozzle body, and the output end of the liquid supply pipe and passing through the liquid spraying space, the liquid supply pipe being provided with a first through hole with a size larger than that of the electrode wire and allowing the electrode wire to pass through.

2. A semi-enclosed showerhead according to claim 1, wherein: The base is provided with a groove adapted to the protective shell, and the side of the protective shell close to the groove is provided with a second opening.

3. A semi-enclosed showerhead according to claim 1, wherein: The size of the protective shell is larger than that of the nozzle body, and an internal space is enclosed between the protective shell and the nozzle body, and the input end of the liquid supply pipe is arranged in the internal space.

4. A semi-enclosed showerhead according to claim 3, wherein: The liquid supply pipe comprises a flat portion and a vertical portion with their ends connected to each other, one end of the flat portion away from the vertical portion is configured as the input end, and one end of the vertical portion away from the flat portion is configured as the output end, the flat portion is arranged in the internal space, and the vertical portion extends through the cover to the communicating space.

5. A semi-enclosed showerhead according to claim 4, wherein: The end of the vertical portion is a sealed end, and the first through hole is arranged in the vertical portion close to the sealed end in a horizontal direction.

6. A semi-enclosed showerhead according to claim 4, wherein: The flat portion is provided with a buckle, and the buckle is detachably connected to the nozzle cover by a screw.

7. A semi-enclosed showerhead according to claim 1, wherein: The inner wall of the protective shell is provided with a clearance groove adapted to the horizontal portion.

8. A semi-enclosed showerhead according to claim 1, wherein: The bottom of the nozzle body is provided with a threaded hole, the base is provided with a second through hole corresponding to the threaded hole, the protective shell is provided with a third through hole for the electrode wire to pass through, the nozzle body is provided with a fourth through hole for the electrode wire to pass through, and the size of the third through hole is larger than that of the first through hole and the fourth through hole.

9. A semi-enclosed showerhead according to claim 1, wherein: The utility model further comprises a return pipe, the return pipe extends through the second through hole and into the threaded hole, the end of the return pipe is provided with external threads adapted to the threaded hole, and the return pipe is connected to the liquid spraying space.

10. An electrospinning machine characterized by, The utility model relates to a semi-closed shower nozzle comprising any one of claims 1-9.

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