Electrostatic plexor

Abstract

The utility model relates to spinning equipment technical field discloses a static electrostatic spinning device, including base, platform, elevating table and collection device. The inside of base is equipped with slide rail no. 1 and electric push rod no. 1, is used for driving platform horizontal sliding to adjust spinning receiving distance, and the top of platform is equipped with slide rail no. 2 and electric push rod no. 2, is used for driving elevating table vertical motion, and the top of platform is fixed with ultrasonic cleaning tank. The elevating table is rotatably connected with clamp through fixed plate. The utility model discloses through flow velocity appearance monitoring blockage, cooperates and realizes the automatic overturning of spray head to dip and clean with rotary lifting mechanism, has solved the problem that the spray head exists and is difficult to maintain of blockage, and has realized synchronous electrostatic, has improved production continuity and product quality significantly.

Description

Technical Field

[0001] This utility model relates to the field of spinning equipment technology, and in particular to an electrostatic electret spinning device. Background Technology

[0002] Electrospinning is an effective method for preparing continuous long fibers. The nanofiber membranes prepared have excellent properties such as large specific surface area, high porosity, and small fiber diameter, and are widely used in air filtration, water treatment, and biomedical materials. In order to further improve the adsorption and filtration efficiency of fiber membranes for fine particulate matter, it is necessary to electret treat the fibers either during the spinning process or after the spinning process to make them electrostatically charged. However, the electrospinning process involves high-pressure jetting of polymer solutions, which makes the spinning nozzle the most critical but also the most prone to failure component in the entire system.

[0003] Because the spinning solution has high viscosity and volatility, the rapid evaporation of the solvent during the actual electrospinning process can cause the polymer to precipitate and solidify at the nozzle tip. As the spinning time progresses, these solidified substances will gradually accumulate, thereby changing the formation state of the Taylor cone, resulting in jet instability. In severe cases, it can directly block the nozzle and cause spinning interruption.

[0004] Existing electrospinning equipment has a relatively fixed structural design, with nozzles mostly using static installation methods and lacking flexible displacement and angle adjustment mechanisms. When nozzle blockage occurs, existing equipment often cannot automatically detect and respond. Operators must first cut off the high-voltage power supply, stop the entire production line, and then manually disassemble the nozzle for cleaning and replacement. This method is not only time-consuming and labor-intensive, severely reducing production efficiency and continuity, but also poses certain safety hazards due to manual contact with parts containing residual high-voltage static electricity and chemical solvents. Currently, there is a lack of electrostatic electret spinning equipment on the market that integrates flow rate monitoring functions and can automatically change the nozzle posture and send it to the cleaning station for online maintenance after detecting blockage.

[0005] Therefore, this invention proposes an electrostatic electret spinning device to address the shortcomings of existing technologies. Utility Model Content

[0006] In existing electrospinning devices, the nozzle position is fixed and the adjustment range is limited, making it impossible to flexibly and accurately adjust the spinning receiving distance according to the characteristics of the spinning solution, resulting in poor process adaptability. Furthermore, the nozzles can become clogged during long-term spinning processes, and existing equipment lacks real-time flow rate monitoring and automated online cleaning mechanisms. Clogs often require manual shutdown and disassembly for maintenance, severely impacting production efficiency. In addition, traditional devices do not integrate an electret treatment structure, resulting in fiber membranes with low charge retention and poor filtration performance. This invention aims to provide an electrostatic electret spinning device with an improved structure that effectively solves the above problems.

[0007] This utility model provides an electrostatic electret spinning device, including: a base, a first slide rail, a first electric push rod, a platform, a second slide rail, a second electric push rod, a lifting platform; as well as a first fixing plate, a clamp, a connecting plate, a first motor, a pipe, a nozzle, a flow meter, a cleaning tank, a second fixing plate, a transmission rod, a collecting device, a second motor, a bracket, a fixing rod, and an electret rod.

[0008] The assembly consisting of the lifting platform, clamp, and motor has a rotating structure that enables the nozzle to flexibly switch between the horizontal spinning station and the vertical cleaning station. Combined with the mobility of the platform and the lifting platform, it realizes the three-dimensional spatial positioning and attitude adjustment of the nozzle.

[0009] Furthermore, the base has a horizontal sliding fit with the platform via a slide rail and an electric actuator to adjust the spinning distance; the top of the platform has a vertical sliding fit with the lifting platform via a slide rail and an electric actuator to control the lifting and lowering of the nozzle into the cleaning tank; the top of the lifting platform has a rotatable connection with the clamp via a fixing plate and a motor to drive the clamp to rotate via a connecting plate and a connecting rod; the nozzle and the flow meter are respectively connected to the two ends of the pipe and move synchronously with the clamp; the cleaning tank is fixedly installed on the top of the platform and located in the projection area below the nozzle, so that it can be immersed after the nozzle rotates downward; the collecting device is rotatably mounted on the base via a fixing plate and a transmission rod, and is powered by the motor and a bracket; the electret rod is mounted on the base via a fixing rod and is located between the nozzle and the collecting device for synchronous electreting of the jet.

[0010] Preferably, the slide rail is configured as two sets, which are fixedly installed on the left and right sides inside the base respectively. The platform is provided with a corresponding slider that cooperates with the two sets of slide rails. The electric push rod is arranged between the two sets of slide rails to provide a stable horizontal driving force and prevent the platform from jamming.

[0011] Preferably, the lifting platform has a clearance notch on the left side of the middle section for the clamp and nozzle to rotate. The fixing plate is installed close to the edge of the clearance notch, and the electric push rod is installed vertically on the side of the lifting platform to achieve lifting drive and tilting clearance in a compact space.

[0012] Preferably, the first set of fixing plates is configured as two sets, front and rear. The clamp is rotatably supported between the two sets of fixing plates by bearings. The connecting rod passes through one set of fixing plates to transmit power from the motor to the clamp, ensuring the rotational stability of the clamping structure.

[0013] Preferably, the pipe runs horizontally through the solid center of the clamp, the nozzle is connected to the pipe protrusion end by a threaded seal, and the flow meter is installed in series at the liquid inlet end of the pipe to monitor the spinning solution flow rate in real time and provide feedback on blockage signals.

[0014] Preferably, the cleaning tank is designed as a wide-mouth container, and an ultrasonic generator is installed inside to generate high-frequency vibration waves, which utilize the cavitation effect to efficiently remove solidified material inside and outside the nozzle when the nozzle is immersed in the cleaning fluid.

[0015] Preferably, the second set of fixing plates is configured as two sets, the transmission rod spans across the top of the two sets of fixing plates, and the collecting device is designed as a cylindrical roller structure located between the two sets of fixing plates for continuously winding and receiving nanofiber membranes.

[0016] Preferably, the bracket consists of an upper tabletop and a lower support leg. The upper tabletop is fixedly connected to the housing of the second motor, and the lower support leg is fixedly connected to the ground, providing stable support for the collection drive mechanism.

[0017] Preferably, the fixing rod is configured as two sets, with the electret rod horizontally connected to its top end, and the height of the electret rod is set to be higher than the height of the central axis when the nozzle is in a horizontal working state, so as to ensure that the ejected fiber jet can fully pass through the superposition area of ​​the high voltage electrostatic field and the electret electric field, thereby improving the electret effect.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model solves the problem of difficult automatic detection of nozzle blockage in existing electrostatic spinning devices and the need for manual disassembly and cleaning, which leads to production interruption, by integrating a flow meter on the clamping pipe and combining it with a motor-driven rotating mechanism and an electric push rod-driven lifting mechanism in conjunction with the cleaning tank. It achieves the effect of real-time monitoring of nozzle status, automatic alarm for blockage, and online flip-immersion ultrasonic cleaning, thereby ensuring production continuity and stability.

[0020] 2. This utility model solves the problem of weak electrostatic adsorption performance and low filtration efficiency of fiber membranes prepared by traditional single spinning devices by setting electret rods on the path between the nozzle and the collection device. It achieves the effect of applying electret charge synchronously during the flight of fiber formation, which significantly improves the filtration efficiency and charge retention rate of the final fiber membrane product.

[0021] 3. This utility model solves the problem that traditional fixed nozzles cannot accurately adjust the spinning receiving distance according to different spinning solution characteristics by forming a two-dimensional adjustment system consisting of a horizontal sliding component in the base and a vertical lifting component on the platform. It achieves the effect of flexibly controlling process parameters to optimize Taylor cone formation and fiber deposition morphology, while meeting the requirements for seamless switching between working and cleaning stations. Attached Figure Description

[0022] Figure 1 This is a perspective view of an electrostatic electret spinning device proposed in this utility model;

[0023] Figure 2 This is a perspective view of an electrostatic electret spinning device proposed in this utility model;

[0024] Figure 3 This is a schematic diagram of the fixture in an electrostatic electret spinning device proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the lifting platform in an electrostatic electret spinning device proposed in this utility model.

[0026] Legend:

[0027] 1. Base; 2. Electric actuator 1; 3. Slide rail 1; 4. Platform; 5. Slide rail 2; 6. Cleaning tank; 7. Electric actuator 2; 8. Flow meter; 9. Pipe; 10. Nozzle; 11. Fixing plate 1; 12. Lifting platform; 13. Clamp; 14. Motor 1; 15. Fixing rod; 16. Electret rod; 17. Motor 2; 18. Fixing plate 2; 19. Collection device; 20. Transmission rod; 21. Bracket; 22. Connecting plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Example:

[0030] Please refer to Figures 1 to 4 This utility model provides an electrostatic electret spinning device, which aims to solve the problems of limited nozzle position adjustment, clogging after long-term operation, lack of automatic cleaning function, and poor production efficiency and product quality caused by the lack of integrated electret treatment structure in existing electrostatic spinning devices.

[0031] like Figure 1 and Figure 2 As shown, an electrostatic electret spinning device includes a base 1 and a platform 4 slidably disposed on the base 1. The base 1 serves as the mounting base for the entire device and has a hollow internal structure to accommodate the driving components. The platform 4 serves as an intermediate load-bearing component for horizontal displacement adjustment. Specifically, a slide rail 3 and an electric push rod 2 are fixedly connected inside the base 1. To ensure smooth movement, two sets of slide rails 3 are provided and fixedly connected to the left and right inner walls of the base 1, respectively. Slider blocks are provided at both ends of the platform 4, and the sliders slide in cooperation with the slide rails 3. The electric push rod 2 is located between the two sets of slide rails 3. The fixed end of the electric push rod 2 is fixedly connected to the inner wall of the base 1, and the telescopic end of the electric push rod 2 is fixedly connected to the platform 4. By controlling the telescopic length of the electric push rod 2, the platform 4 can be pushed to move horizontally back and forth above the base 1 along the guide direction of the slide rails 3, thereby precisely adjusting the spray starting position and sending the nozzle 10 to a specific working area.

[0032] Reference Figure 1 and Figure 4 The top of platform 4 not only supports the cleaning components but also integrates a vertical lifting mechanism. A second slide rail 5 and an electric actuator 7 are fixedly connected to the top of platform 4. The second slide rail 5 is arranged vertically, and a lifting platform 12 is slidably connected to it. The electric actuator 7 is vertically fixed between the bottom right side of the lifting platform 12 and platform 4. The telescopic end of the electric actuator 7 is fixedly connected to the lifting platform 12. The telescopic movement of the electric actuator 7 drives the lifting platform 12 to move vertically up and down along the slide rail 5. A clearance notch is provided on the left side of the middle of the lifting platform 12 for the subsequent installation of the clamp 13 and spray nozzle. The head 10 provides space for rotation and flipping to prevent mechanical interference. Meanwhile, a cleaning tank 6 is fixedly connected to the top of the platform 4 and located in the projection area below the left side of the lifting platform 12. The cleaning tank 6 moves horizontally synchronously with the platform 4 and always remains below the left side of the lifting platform 12. The cleaning tank 6 is a hollow cavity structure with an open top. The inner side wall is equipped with an ultrasonic generator for generating high-frequency vibration. When the nozzle 10 needs to be cleaned, the nozzle 10 is sent into the cleaning tank 6 by the lowering of the lifting platform 12. The cavitation effect generated by the ultrasonic generator is used to peel off the solidified material on the surface of the nozzle 10.

[0033] A rotatable spray monitoring system was constructed on the lifting platform 12. Please refer to the following for details. Figure 3 and Figure 4 The top of the lifting platform 12 is fixedly connected to two sets of fixed plates 11. The two sets of fixed plates 11 are arranged side by side to form a stable support fulcrum. The two sets of fixed plates 11 are rotatably connected to a clamp 13 through a bearing. The clamp 13 serves as a carrier for the core spraying element and can rotate around the horizontal axis under the support of the fixed plates 11. A connecting plate 22 is fixedly connected to one side of the outer wall of the clamp 13. The side of the connecting plate 22 facing away from the clamp 13 is fixedly connected to the output shaft of the motor 14 through a rigid connecting rod. The connecting rod passes through the through hole on the set of fixed plates 11 located on the rear side. The motor 14 serves as a rotation drive source and drives the clamp 13 to adjust the angle through the connecting plate 22, so that the nozzle 10 on the clamp 13 can freely switch between the horizontal spinning state and the vertical cleaning state.

[0034] Meanwhile, a pipe 9 is fixedly installed at the center of the fixture 13. The pipe 9 runs horizontally through the body of the fixture 13. A nozzle 10 is fixedly connected to the extended end of the pipe 9 on the left side of the fixture 13. The nozzle 10 is made of conductive metal and is electrically connected to an external high-voltage power supply. It is used to atomize the spinning solution and spray it out to form a jet under the action of a high-voltage electric field. A flow meter 8 is fixedly connected to the extended end of the pipe 9 on the right side of the fixture 13. The flow meter 8 is connected in series on the liquid inlet pipe to monitor the flow rate data of the spinning solution in real time and use the data as a basis for judging whether the nozzle 10 is blocked. When the flow meter 8 detects an abnormal decrease in flow rate, the control system controls the motor 14 to rotate so that the nozzle 10 faces downward and is aligned with the cleaning tank 6. The cleaning process is completed in conjunction with the retraction action of the electric push rod 7.

[0035] To ensure that the platform 4 moves smoothly and can bear a large load, the slide rail 3 is set in two sets and is fixedly connected to the inner wall of the left and right ends of the base 1 respectively. The bottom of the platform 4 is provided with sliders that are adapted to the slide rail 3 at both ends. The sliders and the slide rail 3 form a sliding fit. The electric push rod 2 is located on the central axis between the two sets of slide rail 3. The layout ensures that the thrust is evenly distributed and prevents the platform 4 from deflecting during the movement.

[0036] In order to coordinate with the rotation of the clamp 13 and optimize the spatial layout, and to prevent interference with the mechanical structure, a clearance notch is provided on the left side of the middle of the lifting platform 12 to allow the clamp 13 to rotate. The fixing plate 11 is fixedly installed on the left edge of the middle of the lifting platform 12, close to the clearance notch. The electric push rod 7 is vertically fixed between the bottom right side of the lifting platform 12 and the platform 4. The structure makes the lifting platform 12 balanced by force and provides sufficient space for rotation.

[0037] To ensure stable clamping of the nozzle 10 and connection of the pipeline, two sets of fixing plates 11 are provided. The two ends of the clamp 13 are respectively mounted between the two sets of fixing plates 11 via bearings. The connecting rod passes through one set of fixing plates 11 and is connected to the connecting plate 22. The clamp 13 is a block structure. The pipe 9 runs horizontally through the central axis of the clamp 13. The nozzle 10 is connected to the end of the pipe 9 extending out of the left side of the clamp 13 via a threaded seal. The flow meter 8 is sleeved on the pipe wall on the right side of the pipe 9 extending out of the clamp 13. The design facilitates the disassembly and maintenance of the nozzle 10 and the flow meter 8.

[0038] To ensure cleaning effectiveness and prevent collisions, the cleaning tank 6 is a hollow cavity structure with an open top. The inner diameter of the cleaning tank 6 is designed to be larger than the outer diameter of the nozzle 10. The inner sidewall of the cleaning tank 6 is equipped with an ultrasonic generator for vibrating and cleaning the nozzle 10. The ultrasonic generator can generate high-frequency vibration waves to peel off the adhering substances on the surface of the nozzle 10.

[0039] To construct a stable receiving end and support the drive mechanism, two sets of fixed plates 18 are configured. The transmission rod 20 is horizontally mounted between the tops of the two sets of fixed plates 18. The collecting device 19 is located in the space between the two sets of fixed plates 18 and is designed as a cylindrical roller structure to facilitate the winding of the fiber membrane. The support 21 consists of an upper table and a lower leg. The upper table of the support 21 is fixedly connected to the housing of the motor 17, and the lower leg of the support 21 is fixedly connected to the ground. This support method effectively reduces the impact of motor vibration on the collection quality.

[0040] In order to achieve synchronous electret treatment to improve the filtration efficiency of the fiber membrane, the fixing rods 15 are set in two groups, and the electret rods 16 are horizontally connected to the top of the two groups of fixing rods 15. The height of the electret rods 16 is higher than the height of the central axis when the nozzle 10 is in the horizontal spinning state. The position setting ensures that the spinning jet can fully pass through the electric field area generated by the electret rods 16.

[0041] Working principle: At the start of operation, the spinning solution enters from the right side of pipe 9. The flow meter 8 measures the velocity of the flowing spinning solution in real time. At this time, the high-voltage power supply is turned on, putting the nozzle 10 at a high potential. The collection device 19 is grounded, forming a strong electric field between the two. The spinning solution is transported to the nozzle 10 through pipe 9. Under the action of the high-voltage electrostatic field, the spinning solution at the tip of the nozzle 10 gathers to form a Taylor cone. When the electric field force exceeds the surface tension of the spinning solution, the spinning solution is ejected from the tip of the Taylor cone to form an ultrafine fiber jet. During the jet's flight, the solvent evaporates, and at the same time, the electret located at the top of the fixed rod 15... Rod 16 performs synchronous electret treatment on the jet, charging it to improve filtration efficiency. Finally, the fiber is deposited on the collection device 19 to form a fiber membrane. Motor 17, fixed on the bracket 21, starts and drives the transmission rod 20, which is mounted on the fixed plate 18, to rotate. The transmission rod 20 drives the collection device 19 to rotate continuously, so that the fiber membrane is evenly wound and received. During this process, the electric push rod 2 inside the base 1 can be extended and retracted to push the platform 4 to slide on the slide rail 3, thereby adjusting the spinning receiving distance between the nozzle 10 and the collection device 19 to adapt to different process parameter requirements.

[0042] After the nozzle 10 has been working for a period of time, if the flow meter 8 detects an abnormal decrease in the flow rate in the pipe 9, the system determines that the nozzle 10 is blocked. At this time, the system automatically cuts off the high-voltage power supply to stop spinning to ensure safety. Then, the motor 14 is started to rotate, and the clamp 13 and nozzle 10 mounted between the fixed plates 11 are rotated through the connecting plate 22, so that the nozzle 10 changes from a horizontal state to a downward state and is accurately aligned with the cleaning tank 6. Then, the electric push rod 7 is controlled to retract, pulling the lifting platform 12 down along the slide rail 25, causing the nozzle 10 to be immersed in the cleaning liquid inside the cleaning tank 6. The ultrasonic generator inside the cleaning tank 6 is started, generating high-frequency oscillation waves to clean the nozzle 10, effectively removing the solidified blockage inside and on the surface of the nozzle 10.

[0043] After cleaning, the electric actuator 7 extends and lifts the platform 12 to reset, causing the nozzle 10 to detach from the cleaning tank 6. After the solvent on the surface of the nozzle 10 evaporates and dries, the motor 14 rotates in the opposite direction and drives the clamp 13 to reset, so that the nozzle 10 is re-aligned horizontally with the collection device 19. Finally, the high-voltage power supply is turned on again, and the device resumes normal electrostatic spinning operation. The process realizes automatic monitoring and online maintenance of nozzle 10 blockage, which greatly improves production efficiency.

Claims

1. An electrostatic electret spinning apparatus, comprising: The base (1) has a slide rail (3) and an electric push rod (2) fixedly connected inside. The slide rail (3) is slidably connected to a platform (4). The telescopic end of the electric push rod (2) is fixedly connected to the platform (4). The top of the platform (4) is fixedly connected to a slide rail (5) and an electric push rod (7). The slide rail (5) is slidably connected to a lifting platform (12). The telescopic end of the electric push rod (7) is fixedly connected to the lifting platform (12). The feature is that a fixed plate (11) is fixedly connected to the top of the lifting platform (12), and a clamp (13) is rotatably connected to the fixed plate (11). A connecting plate (22) is fixedly connected to one side of the clamp (13), and the connecting plate (22) is fixedly connected to the output shaft of the motor (14) through a connecting rod. A pipe (9) is fixedly connected inside the clamp (13). One end of the pipe (9) is connected to a nozzle (10), and the other end of the pipe (9) is connected to a flow meter (8). The position of the top of the platform (4) and the projection area below the nozzle (10) is fixed. A cleaning tank (6) is connected to the base (1). A fixing plate (18) is fixedly connected to one side of the top of the base (1). A transmission rod (20) is rotatably connected to the fixing plate (18). A collection device (19) is fixedly connected to the middle of the transmission rod (20). A motor (17) that drives the transmission rod (20) to rotate is connected to the end of the transmission rod (20). A bracket (21) is fixedly connected to the bottom of the motor (17). The bracket (21) is fixedly connected to the ground. A fixing rod (15) is fixedly connected to the top of the base (1) and between the collection device (19) and the nozzle (10). An electret rod (16) is fixedly connected to the top of the fixing rod (15).

2. The electrostatic electret spinning apparatus according to claim 1, characterized in that, The slide rail (3) is set in two sets and is fixedly connected to the left and right ends of the base (1) respectively. The platform (4) has corresponding sliders inside both ends. The sliders slide in cooperation with the slide rail (3). The electric push rod (2) is located between the two sets of slide rails (3).

3. The electrostatic electret spinning apparatus according to claim 1, characterized in that, The lifting platform (12) has a clearance opening on the left side of the middle part for the clamp (13) to rotate. The fixing plate (11) is fixedly installed on the left edge of the middle part of the lifting platform (12). The electric push rod (7) is vertically fixedly connected between the bottom right side of the lifting platform (12) and the platform (4).

4. The electrostatic electret spinning apparatus according to claim 1, characterized in that, The fixing plate (11) is set in two sets. The two ends of the clamp (13) are respectively mounted between the two sets of fixing plates (11) through bearings. The connecting rod passes through one set of fixing plates (11) and is connected to the connecting plate (22).

5. The electrostatic electret spinning apparatus according to claim 1, characterized in that, The clamp (13) has a block structure. The pipe (9) runs horizontally through the central axis of the clamp (13). The nozzle (10) is threaded to the end of the pipe (9) that extends out of the clamp (13) on the left side. The flow meter (8) is sleeved on the pipe wall of the pipe (9) that extends out of the clamp (13) on the right side.

6. The electrostatic electret spinning apparatus according to claim 1, characterized in that, The cleaning tank (6) is a hollow cavity structure with an open top. The inner diameter of the cleaning tank (6) is larger than the outer diameter of the nozzle (10), and the inner sidewall of the cleaning tank (6) is provided with an ultrasonic generator for vibrating and cleaning the nozzle (10).

7. The electrostatic electret spinning apparatus according to claim 1, characterized in that, The two fixed plates (18) are set in two groups. The transmission rod (20) is horizontally mounted between the tops of the two fixed plates (18). The collecting device (19) is located in the space between the two fixed plates (18). The collecting device (19) is a cylindrical roller structure.

8. The electrostatic electret spinning apparatus according to claim 1, characterized in that, The bracket (21) consists of an upper tabletop and a lower support leg. The upper tabletop of the bracket (21) is fixedly connected to the outer shell of the second motor (17), and the lower support leg of the bracket (21) is fixedly connected to the ground.

9. The electrostatic electret spinning apparatus according to claim 1, characterized in that, The fixing rod (15) is set in two sets, and the electret rod (16) is horizontally connected to the top of the two sets of fixing rods (15). The height of the electret rod (16) is higher than the height of the central axis of the nozzle (10) when it is in the horizontal spinning state.

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