CN108034995B - A solid needle electrospinning equipment - Google Patents

Abstract

The invention discloses a solid needle electrospinning equipment, which includes a spinneret system, a fiber receiving system, a liquid supply system, a power supply system and a control system; the spinneret system includes multiple spinnerets for fixing multiple spinnerets. The liquid-conducting fixed tube of the spinneret and the insulating cover provided on each spinneret for electrostatic isolation of the spinneret; wherein, the spinneret includes a spinneret body and a spinneret located at one end of the spinneret body. The connecting seat and a plurality of solid needles located at the other end of the main body of the spinneret. The main body of the spinneret is provided with a liquid supply chamber. The connecting seat is provided with a liquid inlet pipe connected to the liquid supply chamber. The solid needles One end of the needle extends into the liquid supply chamber, and the other end extends out of the main body of the spinneret. There is a gap between each solid needle and the main body of the spinneret; a liquid storage chamber is provided in the liquid guide fixed tube. This equipment can not only avoid electrostatic repulsion of spinning needles, but also allow spinning needles to be arranged at smaller intervals to obtain better electrospinning products.

Description

A solid needle electrospinning equipment

Technical field

The invention relates to an electrospinning equipment, in particular to a solid needle electrospinning equipment.

Background technique

Nanofibers refer to ultrafine fibers with fiber diameters ranging from tens of nanometers to hundreds of nanometers. Compared with ordinary fibers, they have characteristics such as high specific surface area and high porosity. They are three-dimensionally porous and formed by stacking nanofibers. The structured nanofiber membrane material has the advantages of small pore size, high porosity, good connectivity, and controllable packing density, so it can be used as the basic building block of nanoscience and technology; and the production process of nanofibers is carried out through electrospinning method Not only can fiber diameter, fiber morphology, and fiber structure be controlled, but also functional nanofibers with different functions can be easily obtained by using functionalized polymers or adding functional chemicals. Fibers have many excellent properties and have been successfully used in fields such as filtration, catalyst or enzyme carriers, tissue engineering, drug release, sensors, energy storage, textiles and clothing, etc.

In existing electrospinning devices, in order to improve production efficiency, multiple needle spinnerets are usually provided. During operation, multiple needle spinnerets perform electrospinning tasks at the same time. Since each needle spinneret is charged, each spinneret is charged. Dotted needle spinnerets will generate electrostatic fields, so the multiple electrostatic fields generated by multiple needle spinnerets will interfere with each other, causing the nanofibers ejected from the needle spinnerets to bend and arrange irregularly, resulting in spinning If it is uneven, the quality of spinning will be greatly reduced; moreover, the nanofibers will deflect outward during spraying, making it impossible to be attached to the receiving base fabric.

In order to overcome the above problems, the patent application document with publication number CN 106119995 A discloses a solid needle spinneret electrospinning device. The device includes a liquid supply system, a solid needle spinneret spinning system, a lifting system, and a power supply. System, receiving system and control system, wherein the solid needle spinneret spinning system consists of a solid needle spinneret, metal wire wires, insulating liquid guide rods, support plates, and a spinneret liquid storage box, so There is a central hole at the axis of the insulating liquid-conducting rod, and the hole diameter is equal to the diameter of the needle body of the solid needle spinneret. The solid needle spinneret is inserted into the center hole of the insulating liquid-conducting rod; the middle position of the support plate is provided with equal intervals. The N rows of through holes are arranged, and the aperture diameter is equal to the diameter of the middle cylinder of the insulating liquid conduction rod. The insulating liquid conduction rod is arranged in the through hole on the support plate; the bottom of the spinneret liquid storage box has equal openings. There are N rows of conical countersunk spinneret holes arranged at intervals. The hole diameter is equal to the diameter of the middle cylinder of the insulating liquid guide rod. The top is slotted. The outer dimensions of the slot are equal to the outer dimensions of the support plate. The support plate is placed in the spinneret storage box. In the slotting of the liquid box, the support plate is connected to the lifting system, and the bottom cone of the insulating liquid-conducting rod passes through the bottom cone of the spinneret liquid storage box and sinks into the spinneret through hole, and is in close contact. When working, the lifting system drives the support plate to move upward, which increases the gap between the insulating liquid-conducting rod and the conical sinking spinneret part, so that the droplets flow out along the cone at the bottom of the insulating liquid-conducting rod. The droplets are excited by the electric field Taylor cones are produced and nanofibers are formed. Since each solid needle spinneret in this device is arranged in an insulating guide rod, the interference of electrostatic repulsion can be significantly reduced, making the spinning more uniform and the spinning effect better.

However, this device has the following problems in actual production: Since the solid needle spinneret is placed inside the insulated liquid guide rod, the diameter of the insulated liquid guide rod is much larger than that of the solid needle spinneret, which results in the discharge of the solid needle spinneret. The spacing between cloths is large, and when certain production processes require solid needle spinnerets to be arranged at smaller spacings, the existing above-mentioned devices cannot achieve this.

Contents of the invention

The object of the present invention is to overcome the shortcomings of the existing technology and provide a solid needle electrospinning equipment that can avoid electrostatic repulsion of the spinning needles and allow the spinning needles to be arranged at smaller intervals to obtain better results. electrospinning products.

The technical solution of the present invention to solve the above technical problems is:

A solid needle electrospinning equipment, including a spinning system, a fiber receiving system, a liquid supply system, a power supply system and a control system;

The spinneret system includes a plurality of spinnerets, a liquid guide fixed tube for fixing the plurality of spinnerets, and an insulating cover provided on each spinneret for electrostatic isolation of the spinnerets; wherein, The spinneret includes a spinneret body, a connecting seat located at one end of the spinneret body for connecting to a liquid guide fixed pipe, and a plurality of solid cores extending from the spinneret body at the other end of the spinneret body. Needle, wherein the insulating cover surrounds the solid needle, the main body of the spinneret is provided with a liquid supply chamber, the connecting seat is provided with a liquid inlet pipe communicating with the liquid supply chamber, and one end of the solid needle Stretch into the liquid supply chamber, and the other end extends out of the main body of the spinneret. There is a gap between each solid needle and the main body of the spinneret; a liquid storage cavity is provided in the liquid guide fixed tube, and the cavity wall of the liquid storage cavity is It is provided with a liquid inlet and multiple liquid outlets that are connected to the liquid inlet pipe of each spinneret one by one;

The fiber receiving system includes a receiving base fabric, a unwinding roller and a rewinding roller located at both ends of the receiving base fabric, a rewinding roller driving mechanism for driving the rewinding roller movement, and a lifting drive mechanism for driving the receiving base fabric to move up and down. ;

The liquid supply system includes a high-pressure bottle and a liquid storage box, wherein the high-pressure bottle and the liquid storage box are connected through a gas pipe, and the liquid storage box is connected through the liquid inlet of the transfusion pipe and the liquid catheter fixed pipe;

The power supply system includes a high-voltage DC power supply, the positive electrode of the high-voltage DC power supply is connected to the solid needle in each spinneret through a wire, and the receiving base fabric is grounded; the control system, the winding roller driving mechanism and the lifting driving mechanism of the console connection.

In a preferred embodiment of the present invention, the liquid supply chamber is provided with a floating plate sealing ring for driving the solid needle to move up and down, and a plurality of solid needles are fixed on the floating plate sealing ring. When the polymer in the liquid supply chamber When the spinning liquid is not full, the floating plate sealing ring is in contact with the cavity wall of the liquid supply chamber; when the liquid supply cavity is filled with polymer spinning liquid, the floating plate sealing ring is out of contact with the cavity wall of the liquid supply cavity. The above structure is suitable for situations where the spinneret spins downward. The advantage is that when the entire electrostatic equipment is in working condition, the liquid supply chamber is filled with polymer spinning liquid, and the floating plate sealing ring is under the action of buoyancy (at this time The buoyancy of the floating plate sealing ring is greater than the gravity of the floating plate sealing ring and the solid needle) and the cavity wall of the liquid supply chamber is out of contact, opening the gap between the solid needle and the main body of the spinneret, so that the polymer spinning liquid can pass through the The gap flows out and the normal spinning operation is carried out; when the entire electrostatic equipment is in a non-working state, the polymer spinning liquid in the liquid supply chamber lacks replenishment, so the floating plate seal ring is under the action of gravity (at this time the floating plate The buoyancy of the plate sealing ring is less than the gravity of the floating plate sealing ring and the solid needle) and comes into contact with the wall of the liquid supply chamber to seal and close the gap between the solid needle and the main body of the spinneret, thereby preventing the polymer spinning liquid from flowing out of the liquid supply chamber. The flow out of the cavity causes pollution and waste.

In a preferred embodiment of the present invention, the connecting seat of the spinneret is a screw, and the liquid-conducting fixed tube is provided with a screw hole that matches the screw. The spinneret is connected to the spinneret fixing part through the cooperation between the screw rod and the screw hole, so that the spinneret has the advantages of easy installation and replacement and good sealing performance.

Preferably, the winding roller driving mechanism includes a motor, a driving pulley arranged coaxially with the winding roller, and a driven pulley arranged coaxially with the unwinding roller, wherein the output shaft of the motor passes through a coupling. Or the conveyor belt is connected to the driving pulley, and the driven pulley and the driving pulley are connected through the conveyor belt. When working, the output shaft of the motor rotates to drive the driving pulley to rotate, which on the one hand drives the winding roller coaxial with the driving pulley to rotate, and on the other hand drives the driven pulley connected to the driving pulley through the conveyor belt to rotate, thus It drives the unwinding roller to rotate to realize the retracting and unwinding task of receiving the cloth base.

Preferably, the gas pipeline is provided with a gas flow regulating valve and a pressure gauge. During operation, the gas flow regulating valve can be used to control the pressure in the liquid storage tank. When the pressure is large, the flow rate of the polymer spinning liquid is large, and the liquid supply amount per unit time is large. When the pressure is small, the polymer spinning liquid is The flow rate of the spinning solution is small and the amount of liquid supplied per unit time is small, so it can be adjusted according to actual needs.

Preferably, the liquid-conducting fixed tube is a cylindrical hollow sealed tube, the inner cavity of the hollow sealed tube constitutes the liquid storage chamber, the liquid inlet is provided on one end face of the hollow sealed tube, and the liquid outlet The opening is arranged on the cylindrical surface of the hollow sealed tube. Since the inner cavity surface of the hollow sealed tube is a cylindrical surface, it can converge the polymer spinning liquid. In this way, the polymer spinning liquid is gathered to the bottom and then flows out from the liquid outlet provided on the cylindrical surface. This allows the liquid to flow into the spinneret more smoothly; and the cylindrical hollow sealing tube also facilitates cleaning of its inner cavity.

Preferably, the liquid-conducting fixed tube is a rectangular box, and the inner cavity of the rectangular box constitutes the liquid storage chamber. The purpose of this arrangement is that the surface of the rectangular box has a planar structure, and the spinnerets can be set both transversely and longitudinally, so that the number and arrangement of the spinnerets can be reasonably arranged according to actual needs.

Preferably, the main body of the spinneret is a cylinder, and the solid needles are arranged in the circumferential direction on the main body of the spinneret and divided into multiple groups along the radial direction.

Preferably, the insulation cover is a hollow cylindrical structure, and the end of the insulation cover is connected to the spinneret body through a threaded connection structure.

Preferably, the spinneret body is a cylinder, and the solid needles are arranged in an array on the spinneret body.

The working principle of the present invention is:

When working, the high-pressure bottle supplies air to the liquid storage box, so that the liquid storage box is in a high-pressure state. Under this high pressure, the polymer spinning liquid in the liquid storage box can automatically flow from the liquid storage box through the infusion tube to the liquid guide and fix it. In the liquid storage chamber of the tube, it flows through the liquid outlet of the liquid storage chamber to the liquid supply chamber of the spinneret to provide the spinneret with polymer spinning liquid during the spinning process.

In each spinneret, since there is a gap between each solid needle and the main component of the spinneret, the polymer spinning liquid located in the liquid supply chamber of the spinneret can reach the tip of the solid needle through the gap, forming Polymer droplets, when the voltage is adjusted to reach the critical spinning voltage, a Taylor cone appears at the tip of each solid needle, and is further stretched into a spinning jet to form nanofibers, which are sprayed onto the receiving base fabric, and then passed through the unwinding roller and The winding roller winds up the receiving base fabric after spinning.

Among them, since each spinneret is equipped with an insulating cover, the electrostatic interference between the spinnerets is greatly weakened, so each spinneret constitutes an independent spinning unit during the spinning process; and for each spinneret Inside the unit, since each spinneret is equipped with multiple solid needles, although there will be electrostatic interference between the needles, the number of solid needles in each spinneret is relative to the number of solid needles in the entire electrospinning equipment. The number of solid needles is much smaller, so the electrostatic repulsion effect between the solid needles in each spinneret is limited, so that the spinning fibers ejected from each spinneret are less affected by electrostatic interference. Depending on the number of spinnerets and the arrangement position of the spinnerets, the spinning fibers ejected from multiple spinnerets are collected on the receiving base fabric, and higher quality electrospinning products can be obtained. At the same time, since the inner solid needle in each spinneret is a needle of ordinary diameter, the arrangement spacing between needles can be set smaller, and the arrangement shape can also be set flexibly, thus meeting the requirements for small spacing arrangements. requirements to meet specific production process requirements, such as higher production efficiency, greater spinning distribution density, etc.

Compared with the prior art, the present invention has the following beneficial effects:

1. Each spinneret on the solid needle electrospinning equipment of the present invention is provided with an insulating cover, so there will be no problem of electrostatic interference between the spinnerets; and for each spinneret, although There is an electrostatic interference problem between the multiple solid needles inside it. However, since the number of solid needles in each spinneret is much smaller than the number of solid needles in the entire electrospinning equipment, the solid needles in each spinneret The electrostatic repulsion effect between needles is limited, so that the spinning fiber ejected from each spinneret is less affected by electrostatic interference. By reasonably setting the number of spinnerets and the arrangement position of the spinnerets, multiple spinnerets can be used. When the spinning fibers ejected from the spinneret are collected on the receiving base fabric, higher quality electrospinning products can be obtained. At the same time, since the inner solid needle in each spinneret is a needle of ordinary diameter, the arrangement spacing between needles can be set smaller, and the arrangement shape can also be set flexibly, thus meeting the requirements for small spacing arrangements. requirements to meet specific production process requirements, such as higher production efficiency, greater spinning distribution density, etc.

2. The solid needle electrospinning equipment of the present invention can not only avoid the electrostatic repulsion problem caused by the close arrangement of silk needles in the prior art, but also avoid the excessive spacing caused by each spinning needle being provided with an insulator in the prior art. Big problem, it simultaneously solves the problem of electrostatic interference and the problem of spinning needle arrangement density, achieving dual effects.

3. The solid needle electrospinning equipment of the present invention is provided with multiple spinnerets, and multiple solid needles are provided in the spinnerets. During operation, multiple solid needles in the multiple spinnerets can spray at the same time. Therefore, the spinning output can be greatly improved.

4. The solid needle electrospinning equipment of the present invention uses air pressure liquid supply to provide constant air pressure, the number of needles is not limited, the spinning liquid is evenly distributed, and the spinning process is stable.

Description of the drawings

Figure 1 is a schematic structural diagram of a solid needle 5-1 electrospinning equipment of the present invention.

Figure 2 is a schematic structural diagram of the solid needle 5-1 electrospinning equipment shown in Figure 1 when the liquid guiding fixed tube is a cylindrical hollow sealed tube.

Figure 3 is a schematic structural diagram of the nozzle in Figure 1.

Figure 4 is an internal structural diagram of the nozzle of Figure 1.

Figure 5 is a schematic structural view of Figure 1 when the main body of the spinneret is a cylinder and the solid needles are arranged in the circumferential direction on the main body of the spinneret.

Figure 6 is an internal structural diagram of the nozzle corresponding to Embodiment 2.

Figure 7 is a schematic structural diagram of the liquid-conducting fixed tube corresponding to Embodiment 3.

Figure 8 is a schematic structural diagram of the solid needle spinneret body corresponding to Example 4 when it is arranged in an array.

Detailed ways

The present invention will be described in further detail below with reference to the examples and drawings, but the implementation of the present invention is not limited thereto.

Example 1

Referring to Figure 1, a solid needle 5-1 electrospinning equipment of the present invention includes a spinning system, a fiber receiving system, a liquid supply system, a power supply system and a control system;

Referring to Figures 1 to 4, the spinneret system includes a plurality of spinnerets 5, a liquid guide fixing tube 4 for fixing the multiple spinnerets 5, and a tube disposed on each spinneret 5 for counter-spraying. The insulating cover 12 for electrostatic isolation of the spinneret 5 is a hollow cylindrical structure, and the end of the insulating cover 12 is connected to the spinneret main body 5-2 through a threaded connection structure; the spinneret 5 It includes a main body of the spinneret 5-2, a connecting seat 5-3 located at one end of the main body of the spinneret 5-2 for connecting to the liquid guide fixed pipe 4, and a slave spinneret located at the other end of the main body of the spinneret 5-2. A plurality of solid needles 5-1 extending from the main body 5-2, wherein the insulating cover 12 surrounds the solid needles 5-1, and a liquid supply chamber 5-21 is provided in the main body 5-2 of the spinneret. , the connecting seat 5-3 is provided with a liquid inlet pipe 5-5 connected with the liquid supply chamber 5-21, one end of the solid needle 5-1 extends into the liquid supply chamber 5-21, and the other end extends out The main body of the spinneret 5-2 is provided with a gap 5-22 between each solid needle 5-1 and the main body of the spinneret 5-2; a liquid storage cavity is provided in the liquid guide fixed tube 4, and the liquid storage cavity is The cavity wall is provided with a liquid inlet and multiple liquid outlets that are connected to the liquid inlet pipe 5-5 of each spinneret 5; wherein, the connecting seat 5-3 of the spinneret 5 is a screw, The screw is provided with threads 5-4, and the liquid-conducting fixed tube 4 is provided with a screw hole that matches the screw; the spinneret 5 realizes the connection with the liquid-conducting fixed tube 4 through the cooperation of the screw and the screw hole. connection, so that the spinneret 5 has the advantages of easy installation and replacement and good sealing performance.

Referring to Figure 2, the liquid-conducting fixed tube 4 is a cylindrical hollow sealed tube. The inner cavity of the hollow sealed tube constitutes the liquid storage chamber. The liquid inlet is provided on one end face of the hollow sealed tube. The liquid outlet is arranged on the cylindrical surface of the hollow sealing tube. Since the inner cavity surface of the hollow sealed tube is a cylindrical surface, it can converge the polymer spinning liquid. In this way, the polymer spinning liquid is gathered to the bottom and then flows out from the liquid outlet provided on the cylindrical surface. This allows the liquid to flow into the spinneret 5 more smoothly; and the cylindrical hollow sealed tube also facilitates cleaning of its inner cavity.

Referring to Figures 3 and 5, the spinneret body 5-2 is a cylinder, and the solid needles 5-1 are arranged in the circumferential direction on the spinneret body 5-2 and divided into multiple groups along the radial direction.

Referring to Figure 1, the fiber receiving system includes a receiving base cloth 7, transmission rollers 6 located at both ends of the receiving base cloth 7, a winding roller driving mechanism that drives the transmission rollers 6 to rotate, and a lifting drive mechanism that drives the receiving base cloth 7 to move up and down. The transmission roller includes an unwinding roller and a rewinding roller. The lifting drive mechanism is composed of a first motor 14 and a support rod 13. One end of the support rod 13 is connected to the receiving base cloth, and the other end is connected to the first motor. 14 connection; the winding roller driving mechanism includes a second motor, a driving pulley arranged coaxially with the winding roller, and a driven pulley arranged coaxially with the unwinding roller, wherein the output shaft of the second motor It is connected to the driving pulley through a coupling or a conveyor belt, and the driven pulley and the driving pulley are connected through a conveyor belt. When working, the output shaft of the second motor rotates to drive the driving pulley to rotate, which on the one hand drives the winding roller coaxial with the driving pulley to rotate, and on the other hand drives the driven pulley connected to the driving pulley through the conveyor belt to rotate. , thereby driving the unwinding roller to rotate to realize the retracting and unwinding task of receiving the base fabric 7 .

Referring to Figure 1, the liquid supply system includes a high-pressure bottle 11 and a liquid storage box 8. The high-pressure bottle 11 and the liquid storage box 8 are connected through a gas pipeline, and the liquid storage box 8 is connected through an infusion tube and a liquid catheter. The liquid inlet of the fixed pipe 4 is connected; the gas flow pipe is also provided with a gas flow regulating valve 10 and a pressure gauge 9. During operation, the gas flow regulating valve 10 can be used to control the pressure in the liquid storage box 8. When the pressure is large, the flow rate of the polymer spinning liquid is large, and the liquid supply amount per unit time is large. When the pressure is small, The flow rate of the polymer spinning solution is small and the amount of liquid supplied per unit time is small, so it can be adjusted according to actual needs.

Referring to Figure 1, the power supply system includes a high-voltage DC power supply. The positive electrode 1 of the high-voltage DC power supply is connected to the solid needle 5-1 in each spinneret 5 through a wire 3. The receiving base cloth 7 is connected to the ground electrode 2. ; The control system is connected to the control end of the winding roller driving mechanism and the lifting driving mechanism.

The working principle of the present invention is:

When working, the high-pressure bottle 11 supplies air to the liquid storage box 8, so that the liquid storage box 8 is in a high-pressure state. Under this high pressure, the polymer spinning liquid in the liquid storage box 8 can automatically pass through the infusion from the liquid storage box 8. The tube flows into the liquid storage chamber of the liquid guide fixed tube 4, and then flows through the liquid outlet of the liquid storage chamber to the liquid supply chamber 5-21 of the spinneret 5 to provide the spinneret 5 with polymer spinning during the spinning process. liquid.

In each spinneret 5, since each solid needle 5-1 and the spinneret body 5-2 are provided with a gap 5-22, the polymer spinner located in the liquid supply chamber 5-21 of the spinneret 5 The silk liquid can pass through the gap 5-22 and reach the tip of the solid needle 5-1 to form polymer droplets. When the adjusted voltage reaches the critical spinning voltage, a Taylor cone appears at the tip of each solid needle 5-1 and is further pulled. It is stretched into a spinning jet to form nanofibers, which are sprayed onto the receiving base cloth 7, and then the spun receiving base cloth 7 is rolled up through the unwinding roller and the winding roller.

Among them, since each spinneret 5 is provided with an insulating cover 12, the electrostatic interference between the spinnerets 5 is greatly weakened, so each spinneret 5 constitutes an independent spinning unit during the spinning process; and for As for the inside of each spinneret unit, since each spinneret 5 is provided with multiple solid needles 5-1, although there will be electrostatic interference between the needles, due to the solid needles 5-1 in each spinneret 5 The number of 1 is much less than the number of solid needles 5-1 in the entire electrospinning equipment, so the electrostatic repulsion effect between the solid needles 5-1 in each spinneret 5 is limited, making each spinneret The spinning fibers ejected from the spinnerets 5 are less affected by electrostatic interference. By reasonably setting the number of spinnerets 5 and the arrangement position of the spinnerets 5, the spinning fibers ejected from multiple spinnerets 5 are collected at the receiving base. On cloth 7, higher quality electrospinning products can be obtained. At the same time, since the inner solid needle 5-1 in each spinneret 5 is a needle of ordinary diameter, the arrangement spacing between the needles can be set smaller, and the arrangement shape can also be set flexibly to meet the requirements. Small spacing arrangement requirements meet specific production process requirements, for example, higher production efficiency, greater spinning distribution density, etc.

Example 2

Referring to 6, the difference between this embodiment and Embodiment 1 is that the liquid supply chamber 5-21 is provided with a floating plate sealing ring 5-23 for driving the solid needle 5-1 to move up and down, and a plurality of solid needles 5 -1 is fixed on the floating plate sealing ring 5-23. When the polymer spinning solution in the liquid supply chamber 5-21 is not full, the floating plate sealing ring 5-23 is in contact with the wall of the liquid supply chamber 5-21. ; When the liquid supply chamber 5-21 is filled with polymer spinning liquid, the floating plate sealing ring 5-23 is out of contact with the cavity wall of the liquid supply chamber 5-21. The above structure is suitable for situations where the spinneret 5 is spinning downward. Its advantage is that when the entire electrostatic equipment is in working condition, the liquid supply chamber 5-21 is filled with polymer spinning liquid, and the floating plate sealing ring 5-23 is in Under the action of buoyancy (at this time, the buoyancy of the floating plate sealing ring 5-23 is greater than the gravity of the floating plate sealing ring 5-23 and the solid needle 5-1), it breaks away from the wall of the liquid supply chamber 5-21, and the solid needle 5 The gap 5-22 between -1 and the main body of the spinneret 5-2 is opened, so that the polymer spinning liquid can flow out through the gap 5-22 to perform normal spinning operations; when the entire electrostatic equipment is in a non-working state At this time, the polymer spinning liquid in the liquid supply chamber 5-21 lacks replenishment, so the floating plate sealing ring 5-23 is under the action of gravity (at this time, the buoyancy of the floating plate sealing ring 5-23 is smaller than that of the floating plate sealing ring). 5-23 and the gravity of the solid needle 5-1) contact the wall of the liquid supply chamber 5-21, sealing the gap 5-22 between the solid needle 5-1 and the spinneret body 5-2, thereby preventing The polymer spinning liquid flows out from the liquid supply chamber 5-21, causing pollution and waste. The necessity of such an arrangement lies in the fact that in Example 1, the spinning direction is upward, and there is no leakage of polymer spinning liquid, while in this embodiment, the spinning direction is downward. Specifically, the liquid-conducting fixed tube is arranged at Above, the receiving base fabric is set below, and the spinneret is set at the bottom of the liquid-guiding fixed tube. The spinning direction of the spinneret is downward, so even in the non-working state, it is located in the liquid storage chamber of the liquid-guiding fixed tube. The liquid inside will still flow out through the gap 5-22 provided between the solid needle 5-1 and the spinneret body 5-2.

For other implementations other than the above-mentioned implementations of this embodiment, please refer to Embodiment 1.

Example 3

Referring to Figure 7, the difference between this embodiment and Embodiment 1 is that the liquid-conducting fixed tube 4 is a rectangular box, and the inner cavity of the rectangular box constitutes the liquid storage chamber. The purpose of this arrangement is that the surface of the rectangular box has a planar structure, and the spinnerets 5 can be set both transversely and longitudinally, so that the number and number of the spinnerets 5 can be reasonably arranged according to actual needs. Arrangement.

For other implementations other than the above-mentioned implementations of this embodiment, please refer to Embodiment 1.

Example 4

Referring to Figure 8, the difference between this embodiment and Embodiment 1 is that the solid needles 5-1 are arranged in an array on the spinneret body 5-2.

For other implementations other than the above-mentioned implementations of this embodiment, please refer to Embodiment 1.

The above are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention are all without limitation. All substitutions that should be equivalent are included in the protection scope of the present invention.

Claims (9)

1. A solid needle electrospinning equipment, characterized in that it includes a spinning system, a fiber receiving system, a liquid supply system, a power supply system and a control system; The spinneret system includes a plurality of spinnerets, a liquid guide fixed tube for fixing the plurality of spinnerets, and an insulating cover provided on each spinneret for electrostatic isolation of the spinnerets; wherein, The spinneret includes a spinneret body, a connecting seat located at one end of the spinneret body for connecting to a liquid guide fixed pipe, and a plurality of solid cores extending from the spinneret body at the other end of the spinneret body. Needle, wherein the insulating cover surrounds the solid needle, the main body of the spinneret is provided with a liquid supply chamber, the connecting seat is provided with a liquid inlet pipe communicating with the liquid supply chamber, and one end of the solid needle Stretch into the liquid supply chamber, and the other end extends out of the main body of the spinneret. There is a gap between each solid needle and the main body of the spinneret; a liquid storage cavity is provided in the liquid guide fixed tube, and the cavity wall of the liquid storage cavity is It is provided with a liquid inlet and multiple liquid outlets that are connected to the liquid inlet pipe of each spinneret one by one; The fiber receiving system includes a receiving base fabric, a unwinding roller and a rewinding roller located at both ends of the receiving base fabric, a rewinding roller driving mechanism for driving the rewinding roller movement, and a lifting drive mechanism for driving the receiving base fabric to move up and down. ; The liquid supply system includes a high-pressure bottle and a liquid storage box, wherein the high-pressure bottle and the liquid storage box are connected through a gas pipe, and the liquid storage box is connected through the liquid inlet of the transfusion pipe and the liquid catheter fixed pipe; The power supply system includes a high-voltage DC power supply, the positive electrode of the high-voltage DC power supply is connected to the solid needle on each spinneret through a wire, and the receiving base fabric is grounded; the control system, the winding roller driving mechanism and the lifting driving mechanism The control terminal connection; The liquid supply chamber is provided with a floating plate sealing ring for driving the solid needle head to move up and down. A plurality of solid needles are fixed on the floating plate sealing ring. When the polymer spinning liquid in the liquid supply chamber is not full, the floating plate The sealing ring is in contact with the cavity wall of the liquid supply chamber; when the liquid supply cavity is filled with polymer spinning liquid, the floating plate sealing ring is out of contact with the cavity wall of the liquid supply cavity. 2. The solid needle electrospinning equipment according to claim 1, characterized in that the connecting seat of the spinneret is a screw, and the liquid conduction fixed tube is provided with a screw hole that matches the screw. 3. The solid needle electrospinning equipment according to any one of claims 1-2, characterized in that the gas delivery pipe is provided with a gas flow regulating valve and a pressure gauge. 4. The solid needle electrospinning equipment according to any one of claims 1-2, characterized in that the winding roller driving mechanism includes a motor, a driving pulley arranged coaxially with the winding roller and an unwinding roller. A driven pulley with rollers arranged coaxially, wherein the output shaft of the motor is connected to the driving pulley through a coupling or a conveyor belt, and the driven pulley and the driving pulley are connected through a conveyor belt. 5. The solid needle electrospinning equipment according to claim 4, wherein the liquid-conducting fixed tube is a cylindrical hollow sealed tube, and the inner cavity of the hollow sealed tube constitutes the liquid storage chamber, and the liquid-conducting fixed tube is a cylindrical hollow sealed tube. The liquid inlet is provided on one end surface of the hollow sealing tube, and the liquid outlet is provided on the cylindrical surface of the hollow sealing tube. 6. The solid needle electrospinning equipment according to claim 1, wherein the insulating cover is a hollow cylindrical structure, and the end of the insulating cover is connected to the main body of the spinneret through a threaded connection structure. 7. The solid needle electrospinning equipment according to claim 4, wherein the liquid-conducting fixed tube is a rectangular box, and the inner cavity of the rectangular box constitutes the liquid storage chamber. 8. The solid needle electrospinning equipment according to claim 1, characterized in that the main body of the spinneret is a cylinder, the solid needles are arranged in the circumferential direction on the main body of the spinneret and are divided into radial parts. a. 9. The solid needle electrospinning equipment according to claim 1, wherein the spinneret body is a cylinder, and the solid needles are arranged in an array on the spinneret body.