CN211713267U

CN211713267U - Constant-pressure liquid supply multi-needle electrostatic spinning device

Info

Publication number: CN211713267U
Application number: CN201922473842.XU
Authority: CN
Inventors: 张凌霄; 徐德钱
Original assignee: Defan New Material Technology Hangzhou Co ltd
Current assignee: Defan New Material Technology Hangzhou Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-20
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a nanofiber membrane apparatus for producing technical field especially relates to a constant voltage supplies liquid many syringe needles electrostatic spinning device, including reciprocal transmission system, install the spinning system on reciprocal transmission system to and the constant voltage who is connected with spinning system supplies liquid control system, spinning system includes at least one electrode, and the one end of electrode is provided with the high voltage power supply terminal, and fixed mounting has a plurality of syringe needles on the electrode, is provided with the inlet on the electrode, and the inlet is linked together through inlet channel and every syringe needle, still installs in the position that the syringe needle corresponds on the electrode and prevents electrostatic interference mechanism. The utility model discloses a constant voltage supplies liquid many syringe needles electrostatic spinning device through the static interference cover of preventing that sets up, all sets up each syringe needle in solitary space, can effectively weaken the interact between the electrostatic field to the quality of spinning and the life of syringe needle have been guaranteed to a certain extent.

Description

Constant-pressure liquid supply multi-needle electrostatic spinning device

Technical Field

The utility model relates to a nanofiber membrane apparatus for producing technical field especially relates to a constant voltage supplies liquid many syringe needles electrostatic spinning device.

Background

The electrostatic spinning is a technology for effectively preparing the nano-fiber, and the prepared nano-fiber has the characteristics of large specific surface area, large length-diameter ratio, low relative density and the like, and is particularly suitable for the application of filter materials. The electrostatic spinning nanofiber membrane has a three-dimensional spatial structure, not only has the advantages of nanoscale size, high specific surface area and the like, but also has the characteristics of good mechanical stability, small pore diameter among fibers, high porosity, good fiber continuity and the like. The research of the application of the nanofiber material to the filtration industry is focused on by our company, although the electrostatic spinning technology is rapidly developed from the application aspect and the theoretical aspect, the theoretical development always lags behind the application, which leads to the successful research and development of the application result in a laboratory, and the industrialization cannot be realized due to the fact that the mass production cannot be realized in practice.

Although many scholars have studied the electrostatic spinning process and theory extensively, the electrostatic spinning process and theory, especially the large-scale production, are still imperfect, and there are many problems to be solved in the spinning process, such as uneven fiber structure, uneven nanofiber membrane structure, unstable jet flow, poor mechanical properties of the electrospun membrane, etc. There are two main problems with the multi-needle electrospinning technique:

(1) the jet flow is unstable, the jet flow has unstable swing characteristics, so that influence can be generated among the jet flows, each jet flow is mutually staggered, the phenomenon that multiple strands of fibers are doubled in the multi-nozzle spinning process is caused, the collected fiber distribution has arbitrariness, and the adverse consequences of uneven fiber forming structure and the like are caused.

(2) Mutual interference of electrostatic fields

The distribution of the multi-nozzle electrostatic spinning electric field is uneven, and the electric field of the nozzle at the central position can be seriously weakened. In large-scale production, the electric fields at the two ends are larger than the electric field in the middle, and the electrospun fibers are dispersed towards the two ends, so that the adverse effects of uneven electrospinning collection, high fiber diameter unevenness and the like occur.

During the entire electrospinning process, three stages are required from the polymer solution to the nanofibers: the Taylor cone, the transient linear motion and the unstable whiplash motion are formed, wherein the unstable whiplash process is a key stage for influencing the distribution or controllable appearance of the nano fibers on the collecting device according to the expected requirement. It is known that the polymer solution forms a taylor cone under the action of a strong electric field, thereby forming a jet, and the diameter of the jet gradually decreases along with the acceleration of the jet. In essence, electrostatic force applied to the polymer solution is the only driving force in the whole electrostatic spinning process, which is the key to the realization of electrostatic spinning technology.

The utility model discloses multi-needle spinning electrostatic field interferes mutually when mainly solving large-scale production and leads to the electric field intensity difference to lead to the spinning syringe needle to block up and the not good problem of spinning appearance.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a constant voltage supplies liquid many syringe needles electrostatic spinning device through the cover of preventing that static interferes that sets up, all sets up each syringe needle in solitary space, can effectively weaken the interact between the electrostatic field to the quality of spinning and the life of syringe needle have been guaranteed to a certain extent.

The utility model discloses an above-mentioned technical problem is solved to following technical means:

a constant-pressure liquid supply multi-needle electrostatic spinning device comprises a reciprocating transmission system and a spinning system arranged on the reciprocating transmission system, and a constant pressure liquid supply control system connected with the spinning system, the spinning system comprises at least one electrode, one end of the electrode is provided with a high-voltage power supply wiring terminal, a plurality of needle heads are fixedly arranged on the electrode, the electrode is provided with a liquid inlet which is communicated with each needle head through a liquid inlet channel, the electrode is also provided with an anti-static interference mechanism at the position corresponding to the needle head, the anti-static interference mechanism comprises an anti-static interference plate and an anti-static interference cover which are fixedly connected, prevent being provided with on the static interference cover and prevent electric field interference hole, prevent position, the quantity in electric field interference hole and the position, the quantity phase-match of syringe needle, the needle point of syringe needle passes prevents static interference board and arranges in and prevents electric field interference downthehole.

Furthermore, the needles are arranged on the electrode in a matrix, the distance between two adjacent rows of needles is 30-50mm, and the distance between two adjacent needles in the same row is 15-20 mm. Through simulation calculations by the inventors, the interaction between the needles is relatively smaller over this distance range.

Further, still evenly be provided with a plurality of relief valves on the electrode, relief valve and inlet channel are linked together. The design of relief valve can prevent that pressure is too big, leads to syringe needle dropping liquid or flow too big, influences spinning effect.

Furthermore, the length of the needle head arranged in the anti-static interference cover is 1-5 mm.

Further, the needle head is a hidden needle head. According to inventor's research, the utility model discloses apply to the formula syringe needle of hiding for the first time among the electrostatic spinning device, because the formula syringe needle point of hiding is shorter than current spinning syringe needle relatively, more be difficult to take place to block up at the in-process of in-service use, it is more even to go out the liquid.

Further, the constant voltage supplies liquid control system to include constant voltage confession liquid controller, liquid feed tank, air supply generator and a plurality of non-contact pressure transmitter, and is a plurality of non-contact pressure transmitter installs respectively in each inlet channel's terminal position, non-contact pressure transmitter and constant voltage supply controller signal connection, the signal output part of constant voltage liquid supply controller and the signal input part of air supply generator are connected, the air supply generator is linked together through pipeline and liquid feed tank, and the liquid feed tank is linked together through pipeline and inlet.

In the using process, the non-contact pressure transmitter detects the liquid supply pressure, once the liquid supply pressure is detected to be not up to a set value, the non-contact pressure transmitter transmits a signal feedback to the constant-pressure liquid supply controller, the constant-pressure liquid supply controller accurately outputs pulse quantity needing given air pressure and air source output through PID control, the air source generator is started, the pulse type one-way air inlet electronic regulating valve is opened, and constant-pressure liquid supply is carried out.

Furthermore, a one-way air inlet electronic regulating valve is also arranged on a pipeline between the air source generator and the liquid supply tank.

Further, the reciprocating transmission system comprises a driving part and a spinning part which are in transmission connection, the driving part comprises a driving motor and a transmission screw rod, and the transmission screw rod is fixedly installed on an output shaft of the driving motor.

Further, the spinning part comprises an insulating mounting seat and an electrode mounting frame fixedly mounted on the insulating mounting seat, and the spinning system is fixedly mounted on the electrode mounting frame.

The utility model has the advantages that:

1. the utility model discloses a constant voltage supplies liquid many syringe needles electrostatic spinning device through the static interference cover of preventing that sets up, all sets up each syringe needle in solitary space, can effectively weaken the interact between the electrostatic field to the quality of spinning and the life of syringe needle have been guaranteed to a certain extent.

2. The utility model discloses a constant voltage supplies liquid many syringe needles electrostatic spinning device, will be provided formula syringe needle for the first time and apply to electrostatic spinning device with the spinning syringe needle that has most uses now and compare, the formula syringe needle is provided formula syringe needle more to be difficult to take place to block up at the in-process of in-service use, and goes out the liquid more even.

3. The utility model discloses a constant voltage supplies liquid many syringe needles electrostatic spinning device, through the constant voltage liquid supply control system who sets up, can carry out real-time supervision to spinning system's supply liquid pressure, can give each spinning syringe needle and provide quantitative spinning liquid, ensure spinning fiber diameter, can avoid the syringe needle to cause the syringe needle to block up because of the electric field variation simultaneously to a certain extent.

Drawings

FIG. 1 is a schematic structural view of a constant-pressure liquid-supply multi-needle electrostatic spinning device of the present invention;

FIG. 2 is a schematic view of a cross-sectional structure of a spinning system of the multi-needle electrostatic spinning apparatus with constant pressure liquid supply of the present invention;

FIG. 3 is a block diagram of a constant pressure liquid supply control system according to the present invention;

FIG. 4 is a schematic structural view of the anti-static interference plate of the present invention;

FIG. 5 is a schematic structural view of the anti-electrostatic interference cover of the present invention;

the device comprises an electrode 1, a high-voltage power supply binding post 101, a liquid inlet 102, a liquid inlet channel 103, a pressure transmitter interface 104, a needle 2, a pressure release valve 3, an anti-static interference mechanism 4, an anti-static interference plate 41, a threaded hole 411, an anti-static interference cover 42, an anti-electric field interference hole 421, a constant-pressure liquid supply controller 5, a liquid supply tank 6, a gas source generator 7, a non-contact pressure transmitter 8, a one-way air inlet electronic regulating valve 9, a driving motor 10, an insulating mounting seat 11 and an electrode mounting frame 12.

Detailed Description

The invention will be described in detail with reference to the following drawings and specific embodiments:

as shown in fig. 1-5, the utility model discloses a constant pressure supplies liquid many syringe needles electrostatic spinning device, including reciprocal transmission system and install the spinning system on reciprocal transmission system to and the constant pressure supplies liquid control system with the spinning system intercommunication.

The spinning system comprises at least one electrode 1, in the embodiment, two electrodes 1 are selected for illustration, one end of each electrode 1 is provided with a high-voltage power supply terminal 101, and when in use, a high-voltage power supply is connected to the high-voltage power supply terminal 101 to form an electrostatic field. A plurality of needles 2 are fixedly arranged on the electrode 1, the needle 2 of the utility model is a armed needle, the needle point of the armed needle is shorter than that of the existing common spinning needle, the blockage is less likely to occur in the actual use process, and the liquid outlet is more uniform; the needles 2 are arranged on the electrode 1 in a matrix, in this embodiment, 20 needles 2 are selected to be arranged on the electrode 1, each 10 needles 2 are arranged in two rows, the distance between every two adjacent rows of needles 2 is 30-50mm, and the distance between every two adjacent needles 2 in the same row is 15-20mm, and simulation calculation and practice prove that when the distance between the needles 2 is within the numerical range, the electric field interference between every two adjacent needles 2 is relatively small; a liquid inlet 102 is fixedly installed on the electrode 1, a liquid inlet channel 103 is arranged inside the electrode 1, the liquid inlet 102 is communicated with each needle head 2 through the liquid inlet channel 103, specifically, the liquid inlet 102 of the embodiment is arranged at the center of one side of the electrode 1 opposite to the needle heads 2, and each row of needle heads 2 are communicated in series through the same liquid inlet channel 103, so that the spinning solution entering from the liquid inlet 102 can uniformly flow to the position of each needle head 2 as far as possible, in addition, a plurality of pressure relief valves 3 are uniformly arranged on the electrode 1, the pressure relief valves 3 are communicated with the liquid inlet channel 103, in the embodiment, a pressure relief valve 3 is arranged between every five needle heads 2, namely, one pressure relief valve 3 is arranged at the middle position of each row of needle heads 2, the pressure relief valve 3 is a non-metal passive pressure valve, the pressure value is adjustable at 0-100000Pa, and, meanwhile, the phenomenon that the spinning effect is influenced due to the fact that the dropping liquid or the flow of the needle head 2 is too large due to overlarge pressure can be prevented.

The electrode 1 is provided with an anti-static interference mechanism 4 at the position corresponding to the needle head 2, and the anti-static interference mechanism 4 is detachably arranged on the electrode 1 by adopting conventional methods such as screw connection, clamping connection and the like. The size of the anti-static interference mechanism 4 is matched with the size of the electrode 1, the anti-static interference mechanism 4 comprises an anti-static interference plate 41 and an anti-static interference cover 42 which are fixedly connected, threaded holes 411 are correspondingly formed in four corners of the anti-static interference plate 41 and the anti-static interference cover 42, the anti-static interference plate 41 and the anti-static interference cover 42 are fixedly connected through penetrating screws in the threaded holes 411, an anti-electric field interference hole 421 is formed in the anti-static interference cover 42, the position and the number of the anti-electric field interference hole 421 are matched with the position and the number of the needle 2, the needle point of the needle 2 penetrates through the anti-static interference plate 41 and is arranged in the anti-electric field interference hole 421, and the length of the needle 2 arranged in the anti-static interference cover 42 is 1-5 mm.

The constant-pressure liquid supply control system comprises a constant-pressure liquid supply controller 5, a closed liquid supply tank 6, an air source generator 7 and a plurality of non-contact pressure transmitters 8, wherein the plurality of non-contact pressure transmitters 8 are respectively arranged at the tail end positions of the liquid inlet channels 103, a pressure transmitter interface 104 is fixedly arranged at the tail end position of the liquid inlet channel 103 on the electrode 1, the non-contact pressure transmitter 8 is connected with the pressure transmitter interface 104, the liquid supply pressure is monitored in real time, the non-contact pressure transmitter 8 is in signal connection with the constant-pressure liquid supply controller 5, the signal output end of the constant-pressure liquid supply controller 5 is connected with the signal input end of the air source generator 7, the air source generator 7 is communicated with the liquid supply tank 6 through a pipeline, the liquid supply tank 6 is communicated with the liquid inlet 102 through a pipeline, and the pipeline between the air source generator 7 and the liquid supply tank 6 is further provided with the one-way air inlet electronic regulating valve 9. Constant voltage supplies liquid control system is a closed loop control system, and in the in-process that uses, non-contact pressure transmitter 8 detects the confession liquid pressure, in case detect the confession liquid pressure and can not reach the setting value, non-contact pressure transmitter 8 transmits signal feedback to constant voltage confession liquid controller 5, and constant voltage confession liquid controller 5 needs the pulse volume of given atmospheric pressure and air supply output through the accurate output of PID control, and air supply generator 7 starts, opens the one-way air inlet electronic control valve 9 of pulsed, carries out the constant voltage and supplies liquid, the utility model discloses at the in-process that carries out the pressure regulation, adopt the pulsed to adjust, can avoid pressure to rise suddenly to a certain extent, and syringe needle 2 reacts untimely, leads to syringe needle 2 to take place the.

The reciprocating transmission system comprises a driving part and a spinning part which are in transmission connection, the driving part comprises a driving motor 10 and a transmission screw rod (not shown in the figure), the transmission screw rod is fixedly installed on an output shaft of the driving motor 10, the spinning part comprises an insulation installation seat 11 and an electrode installation seat 12 fixedly installed on the insulation installation seat 11, two electrodes 1 of the embodiment are fixedly installed on the electrode installation seat 12, and the two electrodes 1 are located on the same vertical plane and are parallel to each other. When the spinning device is used, the reciprocating distance is adjusted and set, the driving motor 10 is started, the driving motor 10 rotates to drive the transmission screw rod, so that the spinning part and the spinning system are driven to reciprocate until the whole spinning process is completed, in the actual production process, the reciprocating speed of the driving motor 10 can be adjusted according to the movement speed of the receiving device, and the receiving device are matched to produce the uniform nanofiber membrane.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are all known technology.

Claims

1. A constant-pressure liquid supply multi-needle electrostatic spinning device is characterized by comprising a reciprocating transmission system and a spinning system arranged on the reciprocating transmission system, and a constant pressure liquid supply control system connected with the spinning system, the spinning system comprises at least one electrode, one end of the electrode is provided with a high-voltage power supply wiring terminal, a plurality of needle heads are fixedly arranged on the electrode, the electrode is provided with a liquid inlet which is communicated with each needle head through a liquid inlet channel, the electrode is also provided with an anti-static interference mechanism at the position corresponding to the needle head, the anti-static interference mechanism comprises an anti-static interference plate and an anti-static interference cover which are fixedly connected, prevent being provided with on the static interference cover and prevent electric field interference hole, prevent position, the quantity in electric field interference hole and the position, the quantity phase-match of syringe needle, the needle point of syringe needle passes prevents static interference board and arranges in and prevents electric field interference downthehole.

2. The electrostatic spinning device of claim 1, wherein said needles are arranged in a matrix on said electrode, the distance between two adjacent rows of needles is 30-50mm, and the distance between two adjacent needles in the same row is 15-20 mm.

3. The electrostatic spinning device with multiple needles and liquid feeding at constant pressure as claimed in claim 2, wherein a plurality of pressure relief valves are uniformly arranged on the electrodes, and the pressure relief valves are communicated with the liquid feeding channel.

4. The electrostatic spinning device with multiple needles and constant pressure liquid supply of claim 1, wherein the length of the needles placed in the electrostatic interference prevention cover is 1-5 mm.

5. The constant pressure liquid supply multiple needle electrospinning device of claim 4, wherein the needle is a martial arts needle.

6. The electrostatic spinning device with multiple needles for supplying liquid at constant pressure as claimed in any one of claims 1 to 5, wherein the constant pressure liquid supply control system comprises a constant pressure liquid supply controller, a liquid supply tank, a gas source generator and a plurality of non-contact pressure transducers, the plurality of non-contact pressure transducers are respectively mounted at the end positions of the liquid inlet channels, the non-contact pressure transducers are in signal connection with the constant pressure liquid supply controller, the signal output end of the constant pressure liquid supply controller is connected with the signal input end of the gas source generator, the gas source generator is communicated with the liquid supply tank through a pipeline, and the liquid supply tank is communicated with the liquid inlet through a pipeline.

7. The electrostatic spinning device with multiple needles and liquid feeding at constant pressure as claimed in claim 6, wherein a one-way air inlet electronic regulating valve is further installed on the pipeline between the air source generator and the liquid feeding tank.

8. The electrostatic spinning device of claim 7, wherein said reciprocating transmission system comprises a driving member and a spinning member which are in transmission connection, said driving member comprises a driving motor and a transmission screw, and said transmission screw is fixedly installed on an output shaft of the driving motor.

9. The apparatus of claim 8, wherein the spinning assembly comprises an insulative mounting base and an electrode mounting base fixedly mounted on the insulative mounting base, and the spinning system is fixedly mounted on the electrode mounting base.