CN113862800B - Electrospinning structure with multiple nozzles - Google Patents
Electrospinning structure with multiple nozzles Download PDFInfo
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- CN113862800B CN113862800B CN202111296438.5A CN202111296438A CN113862800B CN 113862800 B CN113862800 B CN 113862800B CN 202111296438 A CN202111296438 A CN 202111296438A CN 113862800 B CN113862800 B CN 113862800B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
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- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
本发明提供了一种具有多喷头的静电纺丝结构，包括：框架；设置于框架上、且按基材传送方向依次排布的放卷组件、纺丝机组组件和收卷组件；连接纺丝机组件的上下液组件，以及电控组件；纺丝机组组件包括：固定于框架上的第一承载子架和第二承载子架，设置于第一承载子架上的绝缘模组和喷头模组，相对喷头模组设置、且设置于第二承载子架上的接地板；喷头模组包括于绝缘模组同侧设置的多个喷头，且多个喷头均设置于接地板和绝缘模组之间；基材传送经过接地板过程中，基材位于喷头和接地板之间，且基材贴合接地板传送；本发明的静电纺丝结构，控制精度高，可满足对不同产品工艺和质量的要求。
The present invention provides an electrostatic spinning structure with multiple nozzles, comprising: a frame; a unwinding assembly, a spinning machine assembly and a winding assembly which are arranged on the frame and in sequence according to the direction in which the substrate is conveyed; an upper and lower liquid assembly connected to the spinning machine assembly, and an electronic control assembly; the spinning machine assembly comprises: a first bearing sub-frame and a second bearing sub-frame fixed to the frame, an insulating module and a nozzle module arranged on the first bearing sub-frame, and a grounding plate arranged opposite to the nozzle module and on the second bearing sub-frame; the nozzle module comprises a plurality of nozzles arranged on the same side of the insulating module, and the plurality of nozzles are all arranged between the grounding plate and the insulating module; during the process of conveying the substrate through the grounding plate, the substrate is located between the nozzle and the grounding plate, and the substrate is conveyed in contact with the grounding plate; the electrostatic spinning structure of the present invention has high control accuracy and can meet the requirements for different product processes and quality.
Description
Technical Field
The invention relates to the field of electrostatic spinning film manufacturing, in particular to an electrostatic spinning structure with multiple spray heads.
Background
The electrostatic spinning technology adopts high-voltage electrostatic force to accelerate the spraying of the solution, the solution is pulled by electrostatic force in the extrusion process, the actions of gravity, surface tension and the like are overcome to be drawn into nano or micron silk threads, finally the silk threads fly to the surface of a low-potential substrate to form a layer of film, and in the spinning process, when coulomb force applied to the solution is enough to overcome the gravity, the surface tension and the like, the jet flow obtains upward resultant force to form jet trickles, and the silk threads are formed by electric pulling.
In the prior art, the fiber silk ribbon is provided with high-voltage electricity, and homopolar charges repel each other in the spraying process, so that the thickness distribution of a film on the receiving cloth is uneven, in general, when a single spray nozzle is adopted, the thickness of a material layer is thinner than the center of a nozzle excitation point projected onto the receiving cloth, the annular thickness is increased, the annular shape extends outwards and becomes thinner gradually, when a multi-spray nozzle is adopted, the film layer is provided with a single needle characteristic, the film area formed on the receiving cloth is in a cattle tongue shape, the outline between cattle tongue plaques is clear, and repulsive force is generated by the homodirectional charges when a charged solution is sprayed to the receiving cloth. Thus, it brings difficulty to industrial production of electrostatic spinning.
In order to solve the above-mentioned problems, there are currently 2 solutions, wire excitation and rotation excitation. The solution is smeared on a high-voltage metal wire by wire electric excitation, and the rotary excitation adopts a rotary liquid dipping device to form continuous spinning. But the problems of high machining and assembling requirements, uneven dipping liquid and uncontrollable spinning flow exist in both wire electric excitation and rotary excitation. And needle spinning has great advantages in maintaining stable spinning quality and controlling spinning flow and yield. Therefore, the method is an important subject with research significance for optimizing and improving the multi-needle spinning technology, and making the best use of the multi-needle spinning technology.
Disclosure of Invention
The invention aims to provide an electrostatic spinning structure with multiple spray heads.
In order to achieve the above object, the present invention provides an electrospinning structure having a plurality of spray heads for spraying a solution in an electric field to a substrate transferred to the electrospinning structure through a plurality of spray heads provided thereon to perform electrospinning;
The unreeling component, the spinning unit component and the reeling component are arranged on the frame in sequence according to the conveying direction of the base material;
An upper liquid-lower liquid component which is connected with the spinning machine component and provides a solution sprayed to the base material for a spray head module in the spinning machine component;
The electric control assembly is used for controlling the operation of the electrostatic spinning structure;
The spinning machine set assembly comprises a first bearing sub-frame, a second bearing sub-frame, an insulation module and a spray head module, wherein the second bearing sub-frame is fixed on the frame, the insulation module and the spray head module are arranged on the first bearing sub-frame, and the grounding plate is arranged opposite to the spray head module and is arranged on the second bearing sub-frame;
The spray head module comprises a plurality of spray heads arranged on the same side of the insulation module, the direction of spraying solution by the spray heads is perpendicular to the conveying direction of the base material, and the spray heads are arranged between the grounding plate and the insulation module;
And in the process of conveying the base material through the grounding plate, the base material is positioned between the spray head and the grounding plate, and the base material is jointed with the grounding plate for conveying.
As a further improvement of the invention, the grounding plate is a corrugated plate structure and comprises a planar substrate and a protrusion formed on the same wall surface side of the planar substrate;
And in the process of conveying the base material through the grounding plate, the base material is positioned on the convex side, and the base material is at least attached to the convex for conveying.
As a further improvement of the invention, the insulation module comprises a plurality of insulation plates which are sequentially overlapped and fixed in the direction vertical to the conveying direction of the base material;
At least part of the side wall edges of at least one adjacent group of the plurality of insulating plates have a difference in distance in the substrate conveying direction.
As a further improvement of the present invention, the spray head is a first spray head, the first spray head including:
A first body portion having a first body end portion provided toward the base material, an outer wall surface of the first body end portion being circular arc-shaped;
a first transfer passage penetrating the first body portion for transferring a liquid flow, an outlet of the first transfer passage being located at an end of the first body portion;
An annular first boss extending radially outwardly from the outer wall surface of the first body portion, the first boss being disposed adjacent to the first body end and having a first end surface disposed toward the first body end;
and a first groove recessed from the first end face in a direction away from the first end face.
As a further improvement of the invention, the cross section of the first groove is annular in the radial direction of the first main body part, and the opening of the first groove positioned on the first end surface is communicated with the outer wall surface of the first boss;
the cross section of the first groove becomes gradually smaller in the axial direction of the first main body portion from the first end face toward a direction away from the first end face.
As a further improvement of the present invention, the spray head is a second spray head, the second spray head including:
A second body portion having a second body end portion provided toward the base material, and an end surface of the second body end portion toward the base material being a second body end surface;
a second groove recessed from the second body end face away from the second body end face;
and a second transmission channel penetrating the second main body part and used for conveying liquid circulation, wherein an outlet of the second transmission channel is positioned on the bottom wall surface of the second groove.
As a further improvement of the invention, the cross section of the second groove is circular in the radial direction of the second main body part, and an opening of the second groove positioned on the end surface of the second main body is communicated with the outer wall surface of the second main body part;
the cross section of the second groove gradually becomes smaller in the axial direction of the second main body part from the second main body end face to the direction far away from the second main body end face.
As a further improvement of the invention, the electrostatic spinning structure also comprises a needle sealing component selectively combined with the nozzle module;
the seal needle assembly comprises a seal needle main body, a seal needle hole, a seal block and a seal sleeve, wherein the seal needle main body is arranged corresponding to the spray head and is arranged on the seal needle main body;
when the seal needle component is selectively combined with the spray head module, the seal needle main body is fixed on the spray head module through a pipe clamp, each spray head is correspondingly sleeved in the corresponding seal needle hole, and at least the outlet of each spray head is embedded in the corresponding seal block.
The spinning machine assembly further comprises a moving unit arranged below the first bearing sub-frame, wherein the moving unit comprises a lifting platform frame, a lifting assembly and a sliding assembly, wherein the lifting assembly is arranged on the lifting platform frame, and the sliding assembly is arranged on a moving wheel below the lifting platform frame;
the lifting assembly is used for driving the insulating module and the spray head module to reciprocate in the vertical direction, and the sliding assembly is used for driving the insulating module and the spray head module to reciprocate in the horizontal direction.
The upper and lower liquid component comprises an upper and lower liquid sliding table arranged on the frame, a liquid storage tank matched with the upper and lower liquid sliding table and reciprocating along the upper and lower liquid sliding table, a liquid adding tank connected with the liquid storage tank through a pipeline, a positive pressure tank, a negative pressure tank, a quantitative pump and an electromagnetic valve arranged on the pipeline;
the liquid storage tank is provided with a liquid inlet connected with the liquid adding tank through a pipeline, a liquid outlet connected with the spray head module through a pipeline, an air inlet connected with the positive pressure tank through a pipeline, and an air outlet connected with the negative pressure tank through a pipeline;
when the electrostatic spinning structure works, the liquid level in the liquid storage tank is higher than the outlet of the spray head on the vertical space height.
The invention has the beneficial effects that the electrostatic spinning structure with multiple spray heads is provided with the electric control assembly to control the electrostatic spinning structure uniformly, the integral linkage force of the electrostatic spinning structure is enhanced, the labor cost is saved, the control precision is high, the requirements on different product processes and quality can be met, the splicing is convenient, and the system compatibility is good.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an electrostatic spinning structure with multiple spray heads provided by the invention;
FIG. 2 is a schematic view of a grounding plate according to an embodiment of the present invention;
FIGS. 3A and 3B are schematic cross-sectional views of a grounding plate according to various embodiments of the present invention;
FIG. 4 is a schematic structural diagram of an insulation module according to an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of the portion shown in circle A of FIG. 4;
FIGS. 6 and 7 are schematic cross-sectional views of spray heads according to various embodiments of the present invention;
FIG. 8 is a schematic view of the part of FIG. 1, partially shown from an angular configuration;
FIG. 9 is a schematic diagram of an explosion structure of a seal pin assembly and a nozzle module according to an embodiment of the present invention;
Fig. 10 is a schematic structural diagram of a seal pin assembly and a nozzle module according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. The embodiment is not intended to limit the present invention, and structural, methodological, or functional modifications of the invention according to the embodiment are included in the scope of the invention.
Referring to fig. 1, the present invention provides an electrostatic spinning structure having a plurality of spray heads for spraying a solution in an electric field to a substrate transferred to the electrostatic spinning structure through the plurality of spray heads provided thereon to perform electrostatic spinning.
The electrostatic spinning structure comprises a frame 10, an unreeling component 30, a spinning machine set component 40 and a reeling component 50 which are arranged on the frame 10 in sequence according to the conveying direction of a base material 20, an upper liquid component 60 and a lower liquid component which are connected with the spinning machine component 40 and provide a spray head module in the spinning machine set component 40 with a solution sprayed to the base material 20, and an electric control component 70 for controlling the operation of the electrostatic spinning structure;
Preferably, in practical application, in order to improve equipment stability and product quality, the electrostatic spinning structure with multiple spray heads is preferably placed in a closed room for working, and more preferably, a constant temperature and humidity system can be added in the closed room to adjust the environmental temperature.
The unreeling assembly 30 comprises an unreeling frame 31, an unreeling air expansion shaft 33 arranged on the unreeling frame 31, an unreeling reel 35 which is arranged by taking the unreeling air expansion shaft 33 as a pivot shaft, an unreeling driving motor which is arranged on the unreeling frame 31 and is used for driving the unreeling air expansion shaft 33 to rotate, an unreeling tension testing unit 37 and a shaft roller 39 which are arranged on the unreeling frame 31 and are sequentially arranged behind the unreeling reel 35 in the conveying direction of the base material 20, wherein the shaft roller 39 is used for guiding the base material 20 to run, and the driving motor is usually formed by matching a servo motor with a speed reducer.
Accordingly, the take-up assembly 50 is generally symmetrical with the unwind assembly 30 on both sides of the spin pack assembly 40. In one embodiment of the present invention, the winding assembly 50 includes a winding frame 51, a winding shaft 55 disposed on the winding frame 51 and having a winding shaft as a pivot, a winding driving motor disposed on the winding frame 51 and used for driving the winding shaft to rotate, a winding tension testing unit disposed on the winding frame 51 and sequentially disposed in front of the winding shaft 55 in the conveying direction of the substrate 20, and a shaft roller for guiding the substrate 20 to run.
The substrate 20 is typically a woven receiving fabric.
The spinning machine assembly 40 comprises a first bearing sub-frame 41, a second bearing sub-frame 42 fixed on the frame 10, an insulation module 43 and a spray head module 44 which are arranged on the first bearing sub-frame 41, and a grounding plate 45 which is arranged opposite to the spray head module 44 and is arranged on the second bearing sub-frame 42;
the spray head module 44 includes a plurality of spray heads 441 disposed on the same side of the insulation module 43, the direction of spraying the solution by the spray heads 441 is perpendicular to the conveying direction of the substrate 20, and the plurality of spray heads 441 are disposed between the ground plate 45 and the insulation module 43;
During the process of conveying the substrate 20 through the grounding plate 45, the substrate 20 is located between the nozzle 441 and the grounding plate 45, and the substrate 20 is conveyed by being attached to the grounding plate 45 under the action of electrostatic attraction force of the grounding plate 45.
The first carrier 41 may be integrally formed with the frame 10, or may be provided as a separate component. The lower part of the first carrying sub-frame 41 is provided with a moving wheel which can be transferred from the lower part of the second carrying sub-frame 42, so that the cleaning and maintenance treatment of the spinning machine assembly 40 are facilitated, and the following description will be continued.
Preferably, as shown in fig. 2, 3A and 3B, the grounding plate 45 is a corrugated board structure, and includes a planar substrate 451 and a protrusion 453 formed on the same wall side of the planar substrate 451;
during the transfer of the substrate 20 through the ground plate 45, the substrate 20 is located at the side of the protrusion 453, and the substrate 20 is transferred at least in contact with the protrusion 453.
The number and shape of the protrusions 453 formed on the plane 451 may be set as desired, but in the present invention, the number of the protrusions 453 is not limited thereto, and the shape, size, and number of the spaces between adjacent protrusions 453 may be set as desired, or of course, the shape of the protrusions 453 may be the same or different when the number of the protrusions 453 is plural.
In the process of conveying the substrate 20 and passing through the nozzle 441 and the grounding plate 45, the liquid jet with high-voltage charge continuously emits from the nozzle 441, flies on the substrate 20 from bottom to top and collects the substrate into a film, and the substrate 20 and the grounding plate 45 have potential difference due to poor conductivity of the substrate 20, in addition, the substrate 20 continuously conveys, the substrate 20 and the grounding plate 45 rub to generate electrostatic charge, and the substrate 20 and the grounding plate 45 are mutually attached and adsorbed under the action of electrostatic force. Accordingly, in the process of conveying the base material 20, the base material 20 is in large-area contact with the grounding plate 45, the electrostatic force increases the attaching force between the base material 20 and the grounding plate 45, the friction force during movement is increased, particularly, the static friction force is large when the electrostatic spinning structure is started and stopped, so that in the process of conveying the base material 20, the base material 20 is in a risk of being broken under the condition that a tension threshold value is not set, and the problems of overall equipment maintenance, production stagnation, nozzle blockage, raw material waste and the like are caused. The invention changes the contact between the substrate 20 and the grounding plate 45 from surface contact to multi-line contact by arranging the grounding plate 45 as a corrugated plate structure, thus reducing the adhesion of the grounding plate 45 and the substrate 20 under the action of electrostatic force and reducing the friction force of relative movement.
As shown in fig. 3A, in a specific example of the present invention, the protrusions 453 are shaped as arc strips, and the cross section of each protrusion 453 after being connected to the space therebetween is shaped as waves;
In another specific example of the present invention, as shown in fig. 3B, the protrusion 453 is shaped like a nipple.
Preferably, the second carrier frame 42 is further provided with a guiding roller shaft 421 for at least one group of parallel arrangement, the substrate 20 is conveyed to the winding assembly 50 through the guiding roller shaft 421 after being conveyed through the unwinding assembly 30, and the substrate 20 is conveyed at least in contact with the protrusions 453 through the guiding roller shaft 421 when passing through the grounding plate 45.
Preferably, the insulating module 43 comprises a plurality of insulating plates which are sequentially overlapped and fixed in a direction perpendicular to the conveying direction of the base material 20, wherein at least part of side wall edges of at least one adjacent insulating plate group among the plurality of insulating plates have a distance difference in the conveying direction of the base material.
The insulating plates of different sizes can be sequentially overlapped and fixed to form the base material 20.
Correspondingly, the number of the insulating plates can be specifically set according to the needs, and the insulating module 43 arranged above can ensure that a plurality of S-shaped curves run when the high-voltage electricity climbs on the surface of the insulating module 43, so that the creepage distance from the high-voltage electricity to the grounding end of the electrostatic spinning structure is increased.
The creepage distance is the shortest distance between two conductive parts with potential difference along the surface of the insulating material, the creepage distance = creepage ratio distance is used for supplying the highest voltage, in addition, the creepage distance is also influenced by factors such as the size of a pollution area, the air humidity, the voltage and the like, the creepage distance is 1600mm under the assumption that the pollution grade is grade I, the voltage is 100kV, and the creepage ratio distance is 1.6 cm/kV.
Here, to spraying module 44, only the shower nozzle module 44 that leads to high pressure when the during operation set up in insulating module 43 'S top, insulating module 43' S below still is provided with electron spare parts such as slip table, driving motor, and the electric charge is curved and crawls between the gap of each insulation board of insulating module 43, and the preferential journey S-shaped crawls, so, only need guarantee that the distance that the electric charge crawled is greater than the creepage distance that corresponds spinning voltage and than the calculation and obtain, then electron spare part below insulating module 43 can safe operation, and then protection electric components in the electrostatic spinning structure.
Preferably, the adjacent insulating plates are respectively provided with positioning holes and positioning pins for positioning the adjacent insulating plates and are glued or fixed through insulating screws.
Referring to fig. 4 and 5, in a specific example of the present invention, the insulation module 43 is formed by fixing 7 layers of insulation boards in a vertical direction in a mutually overlapping manner, wherein the 7 layers of insulation boards include a first insulation board 431 having a first size and a second insulation board 433 having a second size, and the first insulation board 431 and the second insulation board 433 are mutually fixed in a mutually overlapping manner at intervals;
Preferably, the first dimension is larger than the second dimension, axes of the first insulating plate 431 and the second insulating plate 433 are in the same line in the vertical direction, the 1 st insulating plate and the 7 th insulating plate are both the first insulating plate 431, and a height difference exists between faces, close to the end, of two adjacent first insulating plates 431 in the vertical direction.
Of course, the sizes of the seven layers of insulating plates can be the same, and the design requirement can be met only by staggering, overlapping and fixing the seven layers of insulating plates in the vertical direction.
As shown in fig. 6, the first embodiment of the present invention provides a first nozzle 441a, where the first nozzle 441a includes a first body 4411a, the first body 4411a has a first body end 4413a disposed toward the substrate 20, and an outer wall surface of the first body end 4413a is arc-shaped;
The first nozzle 441a further includes a first transfer passage 4415a penetrating the first main body 4411a and for transferring a liquid flow, an outlet 44151a of the first transfer passage 4415a being located at the first main body end 4413a, an annular first boss 4417a extending radially outwardly from the first main body 4411a from an outer wall surface of the first main body 4411a, the first boss 4417a being provided near the first main body end 4411a and having a first end surface provided toward the first main body end 4411a, and a first groove 44171a recessed from the first end surface in a direction away from the first end surface.
Preferably, the cross section of the first groove 44171a is annular in the radial direction of the first main body 4411a, and the opening of the first groove 44171a at the first end surface is communicated with the outer wall surface of the first boss 4417 a;
the cross section of the first groove 44171a becomes smaller gradually in the axial direction of the first main body portion 4413a from the first end face to the direction away from the first end face.
According to the first nozzle 441a with the structure, under the high-pressure effect, the conveyed liquid flows to the first groove 44171a along the outer wall surface of the circular arc-shaped first main body end 4413a after flowing out from the outlet 44151a through the first conveying channel 4415a, the opening of the first groove 44171a positioned on the first end surface is communicated with the outer wall surface of the first boss 4417a, so that the side walls of the first groove 44171a share the side walls of the first boss 4417a to form an annular blade, under the high-pressure electrostatic effect, when the first groove 44171a is filled with the liquid, the liquid discharges at the outlet 44151a of the first conveying channel 4415a and the annular blade, the charged jet is sprayed upwards by the outlet 44151a of the first conveying channel 4415a and the annular blade, the design of the first groove 44171a increases the liquid output area, and the design of the annular blade accelerates the liquid conveying, so that the yield is effectively improved.
As shown in fig. 7, the nozzle 441 according to the second embodiment of the present invention is a second nozzle 441b, where the second nozzle 441b includes a second body 4411b, the second body 4411b has a second body end 4413b disposed toward the substrate 20, and an end surface of the second body end 4413b facing the substrate 20 is a second body end surface;
A second recess 44131b recessed from the second body end face away from the second body end face;
A second transfer channel 4415b penetrating the second body 4411b and for transferring the liquid, wherein an outlet 44151b of the second transfer channel 4415b is positioned on the bottom wall surface of the second groove 44131 b.
Preferably, the cross section of the second groove 44131b is circular in the radial direction of the second main body 4413b, and the opening of the second groove 44131b at the end face of the second main body is communicated with the outer wall surface of the second main body 4411 b;
The cross section of the second groove becomes gradually smaller in the axial direction of the second body portion 4411b from the second body end face to the direction away from the second body end face.
The second nozzle 441b with the structure is filled into the inverted cone-shaped second groove 44131b after the liquid is conveyed through the second conveying channel 4415b and flows out from the outlet 44151b under the action of high pressure, when the second groove 44131b is filled up under the action of high pressure, the top liquid surface of the second groove 44131b is arched upwards Cheng Huxing, the surface tension of the liquid is gradually reduced, under the action of high pressure static electricity, the arched arc liquid surface forms a Taylor cone, charged jet is sprayed upwards, and the electrostatic coulomb force required by jet spraying is reduced due to the fact that the outward spraying of the jet overcomes the surface tension, so that the surface tension is reduced, the Taylor cone is formed on the surface of liquid drops more easily, and the yield of electrostatic spinning equipment is increased.
Preferably, as shown in fig. 8, the spinning machine assembly 40 further comprises a moving unit disposed below the first carrying sub-frame 41, wherein the moving unit comprises a lifting platform frame 411, a lifting assembly 413 disposed on the lifting platform frame 411, a sliding assembly 415, and a moving wheel 417 disposed below the lifting platform frame 411.
The lifting assembly 413 can drive the insulation module 43 and the spray head module 44 to reciprocate in the vertical direction under the action of a driving motor to adjust the distance between the spinning machine set assembly 40 and the base material 20 so as to meet the process requirements, the sliding assembly 415 can drive the insulation module 43 and the spray head module 44 to reciprocate in the horizontal direction under the action of the driving motor so as to ensure the uniformity of spinning, and the movable wheel 417 can be arranged to remove the whole spinning machine set assembly 40 so as to facilitate the operations of installation, maintenance, cleaning and the like.
In addition, the above-mentioned electric control components related to the motor are all controlled by the electric control assembly 70, and parameters such as swing speed, amplitude, voltage can be adjusted as required, which will not be further described herein.
With continued reference to fig. 1, the up-down liquid assembly 60 includes an up-down liquid sliding table 61 provided on the frame 10, a liquid storage tank 63 cooperatively provided on the up-down liquid sliding table 61 and reciprocally moving along the up-down liquid sliding table 61 in a vertical direction, a liquid adding tank 65, a positive pressure tank 67 and a negative pressure tank 69 connected to the liquid storage tank 63 through pipes, and a dosing pump 62 and an electromagnetic valve provided on the pipes, respectively, wherein the liquid storage tank 63 has a liquid inlet connected to the liquid adding tank through the pipes, a liquid outlet connected to the spray head module 44 through the pipes, an air inlet connected to the positive pressure tank through the pipes, and an air outlet connected to the negative pressure tank through the pipes.
The liquid storage tank 63 is a closed container, the positive pressure tank 67 and the quantitative pump 62 cooperate to convey the liquid in the liquid adding tank 65 into the liquid storage tank 63 in the running process of the device, meanwhile, the positive pressure tank 67 applies pressure to the interior of the liquid storage tank 65 through the air inlet to press the liquid into the spray head module 44 from the liquid outlet, when the device is stopped or the device needs to be maintained, the negative pressure tank 69 pumps out air from the air outlet of the liquid storage tank 63 to provide negative pressure in the cavity of the liquid storage tank 63, so that the liquid in the spray head module 44 is pumped back to the liquid storage tank 63 from the liquid outlet, and further redundant liquid in the liquid storage tank 63 is pumped back to the liquid adding tank 65.
Preferably, during operation of the electrostatic spinning structure, on the vertical space height, the liquid level in the liquid storage tank 63 is ensured to be higher than the outlet of the nozzle 441, so that when enough pressure is provided, the solution is easily extruded from the nozzle 441, the liquid levels at the outlets of the nozzles 441 are balanced in pressure, and the condition of non-uniform liquid spraying amount among the needles can not occur.
In the implementation mode of the invention, the relative distance between the liquid level in the liquid storage tank 63 and the outlet of the spray head 441 can be changed by pumping liquid through the quantitative pump 62 in combination with the positive pressure tank 67 and the negative pressure tank 69 or pumping liquid, or the relative distance between the liquid level in the liquid storage tank 63 and the outlet of the spray head 441 can be changed by controlling the liquid storage tank 63 to reciprocate on the upper liquid sliding table 61 and the lower liquid sliding table 61.
Correspondingly, the liquid outlet flow rate of the nozzle 441 is controlled by the liquid level in the liquid storage tank 63, and the larger the relative distance between the liquid level and the outlet of the nozzle 441 is, the higher the liquid outlet amount is, and conversely, the smaller the liquid outlet amount is.
Preferably, a weighing device can be arranged under the liquid storage tank 69 in a matching way for measuring and calculating the height of the liquid level in the liquid storage tank 69, or the liquid storage tank 69 is transparent, or a sensor for measuring the liquid level height is arranged on the liquid storage tank 69, and the like, which is not repeated herein.
When the weighing equipment is arranged under the liquid storage tank 69 in a matched mode, a drag chain can be arranged on the liquid storage tank 69 in a matched mode, so that measurement of the weighing equipment is not affected when the liquid storage tank 69 moves back and forth along the upper liquid sliding table 61 and the lower liquid sliding table 61.
Preferably, the electric control assembly 70 may include a power source, a high voltage electrostatic generator, a main control unit, etc., where the power source provides power for the whole electrostatic spinning structure, the high voltage electrostatic generator is electrically connected to the spinning unit assembly 40 and is used for providing high voltage static electricity for the spinning unit assembly 40, and the main control unit is connected to each executing terminal, for example, various motors, the liquid feeding and discharging assembly 60, the network communication assembly, etc., so as to control the overall operation condition of the device.
Preferably, as shown in fig. 9 and 10, the electrostatic spinning structure further comprises a needle sealing assembly 80 selectively combined with the nozzle module 44;
The seal needle assembly 80 comprises a seal needle main body 81, a seal needle hole 83 arranged corresponding to the nozzle 441 and arranged on the seal needle main body 81, and a seal block 83 arranged in the seal needle hole 83;
When the seal pin assembly 80 is selectively combined with the nozzle module 44, the seal pin body 81 is fixed on the nozzle module 44 by the pipe clamp 87, each nozzle 441 is correspondingly sleeved in the corresponding seal pin hole 83, and at least the outlet of each nozzle 441 is embedded in the corresponding seal block 85. Therefore, by arranging the needle sealing assembly selectively combined with the spray head module, the residual liquid in the spray head 441 can be isolated from the outside air in a stop state, the reaction of volatilization and oxidation of materials can not occur any more, and the blockage of a needle head is avoided.
It can be understood that the seal needle main body 81 may be integrally set corresponding to the nozzle module 44, or may be split multiple groups, in an embodiment of the present invention, a set of seal needle main bodies 81 is respectively set corresponding to each row of nozzles in the nozzle module 44, and the outer contour shape of the seal needle main body 81 is not limited, for example, cylindrical, square, hexagonal, etc., the seal needle hole 83 may be a counter bore, that is, the size of the opening of the seal needle hole 83 is slightly larger than that of the nozzle 441, so that the nozzle 441 is easy to enter the seal needle hole 83, and the material of the seal block 85 may be made of rubber or silica gel, so as to more easily seal the opening of the nozzle 441.
The seal needle assembly 80 arranged as above can be selectively combined with the spray head module 44 according to the requirement, when the electrostatic spinning structure operates, the seal needle assembly 80 is separated from the spray head module 44, and the spray head 441 can directly start working without any cleaning work, so that the production efficiency is greatly improved.
The multi-nozzle electrostatic spinning structure has the advantages that an electric control assembly is arranged to uniformly control the electrostatic spinning structure, the swinging speed and the amplitude of a nozzle module, the spinning interval, the spinning flow, the high-voltage electrostatic voltage, the substrate speed and the winding tension are adjusted by combining the characteristics of a solution and a process algorithm, the integral linkage force of the electrostatic spinning structure is enhanced, the labor cost is saved, the friction force between the grounding plate and the substrate is reduced by arranging the grounding plate of the corrugated plate structure, the risk of the substrate being broken is reduced, the electric components in the electrostatic spinning structure are protected by arranging an insulating module formed by superposing a plurality of insulating plates, the yield of the electrostatic spinning structure is improved by arranging the nozzle with a special structure, the pollution of raw materials to the environment and the waste of materials are prevented by arranging the needle sealing assembly, the nozzle is protected, the control precision of the multi-nozzle electrostatic spinning structure is high, the requirements on different product processes and quality can be met, the splicing is convenient, and the system compatibility is good.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
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