CN109989120B - Electrostatic spinning double-channel injector and using method thereof - Google Patents
Electrostatic spinning double-channel injector and using method thereof Download PDFInfo
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- CN109989120B CN109989120B CN201910203809.7A CN201910203809A CN109989120B CN 109989120 B CN109989120 B CN 109989120B CN 201910203809 A CN201910203809 A CN 201910203809A CN 109989120 B CN109989120 B CN 109989120B
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- steering engine
- spinning solution
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
Abstract
The invention discloses an electrostatic spinning double-channel injector which comprises a shell, a spinning solution input pipe, a cleaning solution input pipe, a solution output pipe, a pressure sensor, a steering engine switching valve and a control system, wherein the spinning solution input pipe and the cleaning solution input pipe are arranged at the top of the shell, and the solution output pipe is arranged at the bottom of the shell; the pressure sensor and the steering engine switching valve are arranged in the shell; the invention can reduce the damage caused by replacing the needle head manually, and the needle tube can be cleaned automatically in real time, so that the needle head can be cleaned and maintained well while the manpower is reduced.
Description
Technical Field
The invention relates to the technical field of electrostatic spinning, in particular to an electrostatic spinning double-channel injector and a using method thereof.
Background
In the prior art, the injection pump can accurately control the outflow rate of the spinning solution, so the injection pump is an indispensable unit in the electrostatic spinning technology. However, the problem that the spinning solution is easy to solidify and block the needle head exists, so that the effect of long-time continuous spinning is difficult to achieve, and the injection needle head needs to be manually cleaned within a certain time; one of the existing schemes is to coat a cleaning agent on the surface of a needle head to form an isolation layer to prevent the solution from solidifying and adhering to the inner wall of the needle tube; another proposal is to adopt a mode that the double needle cylinders simultaneously input the spinning solution and the cleaning solution to be mixed to prevent the solution from being blocked.
The first solution is to apply a cleaning agent on the surface of the needle to form an isolation layer to prevent the solution from solidifying and adhering to the inner wall of the needle tube, but this method is not ideal and has the following two problems: firstly, the uniformity of the isolation layer cannot be ensured, so that the contact surface area of the solution and the isolation layer is greatly reduced, and the isolation effect is not obvious; secondly, the corrosion resistance of the isolation layer is weak, so that the needle head needs to be frequently soaked in the spinning process, and the isolation layer is formed on the surface;
the other scheme is to adopt a mode of simultaneously inputting the spinning solution and the cleaning solution into a double-needle cylinder to mix so as to prevent the solution from blocking, but the mixture ratio is difficult to control when the solution is mixed, so that the thickness of the spun nano-fiber filament is not uniform.
In the prior art, the tube wall is cleaned by adopting a high-pressure pulse water mode, but the mode easily causes damage to the inside of the injector and insufficient cleaning.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an electrostatic spinning double-channel injector, which can reduce the damage phenomenon caused by manual needle replacement, automatically clean a needle tube, reduce manpower and simultaneously well clean and maintain the needle.
The invention also aims to provide a using method of the electrostatic spinning double-channel injector.
The purpose of the invention is realized by the following technical scheme:
an electrostatic spinning double-channel injector comprises a shell, a spinning solution input pipe, a cleaning solution input pipe, a solution output pipe, a pressure sensor, a steering engine switching valve and a control system, wherein the spinning solution input pipe and the cleaning solution input pipe are arranged at the top of the shell, and the solution output pipe is arranged at the bottom of the shell; the pressure sensor and the steering engine switching valve are arranged in the shell;
a spinning solution channel and a cleaning solution channel are arranged in the shell, the spinning solution input pipe is connected with the spinning solution channel, and the cleaning solution input pipe is connected with the cleaning solution channel; the two pressure sensors are respectively connected with the spinning solution channel and the cleaning solution channel; the steering engine switching valve is arranged at the bottoms of the spinning solution channel and the cleaning solution channel and can control the on-off state of the spinning solution channel and the cleaning solution channel; a solution bin is arranged below the spinning solution channel and the cleaning solution channel, and the solution output pipe is connected with the solution bin;
the steering engine switching valve comprises a steering engine and a separation plate, the separation plate is connected with the steering engine, and the separation plate can be switched back and forth at the bottoms of the spinning solution channel and the cleaning solution channel so as to plug the spinning solution channel or the cleaning solution channel;
the pressure sensor and the steering engine are respectively connected with the control system.
Preferably, the pressure sensor is a two-dimensional force sensor that can measure pressure and torque simultaneously.
Preferably, the control system comprises a single chip microcomputer and a control circuit.
The use method of the electrostatic spinning double-channel injector comprises the following steps:
(1) in the working process, when the injector normally supplies spinning solution, the resistance value of the pressure sensor connected with the spinning solution channel changes along with the transmission rate of the spinning solution;
(2) when the spinning solution channel is blocked, the transmission rate of the spinning solution is reduced, the surface pressure value of a pressure sensor connected with the spinning solution channel is increased, and a control system determines whether to start a steering engine through the pressure sensor so as to switch a partition plate; the control system controls a steering engine switching valve to work, a steering engine in the steering engine switching valve drives a partition plate to change direction according to a angle set by a program, at the moment, a spinning solution channel stops supplying liquid, a cleaning agent is injected into a cleaning solution channel through a cleaning solution input pipe and normally supplies liquid, the cleaning agent washes and cleans a needle tube after flowing out of a solution output pipe, and meanwhile, the conduction condition of an injector during cleaning is fed back to the control system in real time through a pressure sensor connected with the cleaning solution channel, so that the conveying speed of external cleaning agent is controlled;
(3) when the control system judges that the injector is not blocked, the steering engine switching valve is controlled to work, the steering engine is further started, the partition plate is switched to change the direction, the cleaning solution channel stops supplying liquid, the spinning solution channel normally supplies liquid, and the injector normally works.
The working principle of the invention is as follows:
in the working process, when the injector normally supplies spinning solution, the resistance value of the pressure sensor connected with the spinning solution channel changes along with the transmission rate of the spinning solution; when the spinning solution channel is blocked, the transmission rate of the spinning solution is reduced, the surface pressure value of a pressure sensor connected with the spinning solution channel is increased, and the resistance strain effect (R ═ rho ═ is generated
L/s), if the resistance value is reduced, the current is increased under the condition of constant voltage, and the control system determines whether to start the steering engine by detecting the amplitude of the increase of the current so as to switch the isolation plate; when the current value is larger than a set value, the control system controls the steering engine switching valve to work, the steering engine in the steering engine switching valve drives the isolation plate to change direction according to an angle set by a program, at the moment, the spinning solution channel stops supplying liquid, the cleaning agent is injected into the cleaning solution channel through the cleaning solution input pipe and normally supplies liquid, the cleaning agent washes and cleans a needle tube after flowing out of the solution output pipe, meanwhile, the conduction condition of an injector during cleaning is fed back to the control system in real time through a pressure sensor connected with the cleaning solution channel, so that the conveying speed of the external cleaning agent is controlled, when the control system judges that the injector is not blocked, the steering engine switching valve is controlled to work, the steering engine is started, the isolation plate is switched to change direction, the cleaning solution channel stops supplying liquid, at the moment, the spinning solution channel normally supplies liquid, and the injector normally works.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention can reduce the damage caused by replacing the needle head manually, and the needle tube can be cleaned automatically in real time, thereby reducing the manpower and simultaneously ensuring that the needle head can be well cleaned and maintained;
(2) according to the invention, the mode of inputting the solution by a single device and two channels in sequence is adopted, so that the problem of uneven thickness of the spun nanofiber due to difficulty in control of the ratio during mixing of the solution can be avoided;
(3) the pressure feedback system and the steering engine switching valve are matched with each other, so that the operation is convenient, the process flow is short, and the spun composite nanofiber has structural diversity by setting different pressure thresholds.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a steering engine switching valve of the present invention;
FIG. 3 is a schematic external view of the present invention;
FIG. 4 is a flow chart of the present invention.
The reference numbers in the figures are: 1. a housing; 2. a steering engine switching valve; 3. a spinning solution channel; 4. a pressure sensor; 5. a spinning solution input pipe; 6. a cleaning solution input pipe; 7. a pressure sensor; 8. a cleaning solution channel; 9. a solution bin; 10. a solution output pipe; 11. a steering engine; 12. and (4) a partition board.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
As shown in fig. 1 to 4, an electrostatic spinning dual-channel injector comprises a housing 1, a spinning solution input pipe 5, a cleaning solution input pipe 6, a solution output pipe 10, a pressure sensor, a steering engine switching valve 2 and a control system, wherein the spinning solution input pipe 5 and the cleaning solution input pipe 6 are arranged at the top of the housing 1, and the solution output pipe 10 is arranged at the bottom of the housing 1; the pressure sensor and the steering engine switching valve 2 are arranged in the shell 1; the pressure sensor adopts a two-dimensional force sensor which can simultaneously measure pressure and torsion.
A spinning solution channel 3 and a cleaning solution channel 8 are arranged in the shell 1, the spinning solution input pipe 5 is connected with the spinning solution channel 3, and the cleaning solution input pipe 6 is connected with the cleaning solution channel 8; the number of the pressure sensors is two, and the two pressure sensors are respectively connected with the spinning solution channel 3 and the cleaning solution channel 8; the steering engine switching valve 2 is arranged at the bottom of the spinning solution channel 3 and the cleaning solution channel 8, and the steering engine switching valve 2 can control the on-off state of the spinning solution channel 3 and the cleaning solution channel 8; a solution bin 9 is arranged below the spinning solution channel 3 and the cleaning solution channel 8, and the solution output pipe 10 is connected with the solution bin 9.
The steering engine switching valve 2 comprises a steering engine 11 and a partition plate 12, the partition plate 12 is connected with the steering engine 11, and the partition plate 12 can be switched back and forth at the bottoms of the spinning solution channel 3 and the cleaning solution channel 8 to plug the spinning solution channel 3 or the cleaning solution channel 8.
The pressure sensor and the steering engine 11 are respectively connected with the control system; the control system comprises a single chip microcomputer and a control circuit.
As shown in fig. 4, in operation, when the injector normally supplies the spinning solution, the resistance value of the pressure sensor 4 connected to the spinning solution passage 3 is changed according to the transfer rate of the spinning solution; when the spinning solution channel 3 is clogged, the transport rate of the spinning solution is decreased, the surface pressure value of the pressure sensor 4 connected to the spinning solution channel 3 is increased, and the resistance strain effect (R ═ ρ × l/s, where ρ is the resistivity Ω · cm of the metal conductor) is increased2M, s is the cross-sectional area cm of the conductor2L is the length m) of the conductor, the resistance value of the sensor decreases, and the input sensor current increases as the resistance value of the sensor decreases under the condition that the given voltage is constant; setting a current threshold value according to requirements, and determining whether the steering engine 11 is started or not by the control system by detecting whether the value of the increased current is larger than the current threshold value or not so as to switch the isolation plate 12; when the current value is larger than a set value, the control system controls the steering engine switching valve 2 to work, the steering engine 11 in the steering engine switching valve 2 drives the partition plate 12 to change direction according to a program set angle, at the moment, the spinning solution channel 3 stops supplying liquid, the cleaning agent is injected into the cleaning solution channel 8 through the cleaning solution input pipe 6 and is supplied with liquid normally, the cleaning agent washes and cleans the needle tube after flowing out of the solution output pipe 10, and meanwhile, the cleaning agent is connected with the cleaning solution channel 8The pressure sensor 7 feeds back the conduction condition of the injector during cleaning to the control system in real time, so that the conveying speed of external cleaning agent is controlled, when the control system judges that the injector is not blocked, the steering engine switching valve 2 is controlled to work, the steering engine 11 is started, the switching isolation plate 12 is switched to change direction, the cleaning solution channel 8 stops supplying liquid, at the moment, the spinning solution channel 3 normally supplies liquid, and the injector normally works.
According to the invention, after a certain amount of spinning solution is conveyed, if the pressure sensor detects a corresponding blocking signal, the control end automatically switches the reversing valve, so that a cleaning agent enters the needle tube to be washed and cleaned, and meanwhile, the conduction condition of the channel during cleaning is fed back to the control end through the pressure sensor, so that the conveying speed is controlled.
The invention can reduce the damage caused by replacing the needle head manually, and the needle tube can be cleaned automatically in real time, thereby reducing the manpower and simultaneously ensuring that the needle head can be well cleaned and maintained; due to the adoption of a single device and a mode of inputting the solution in sequence through two channels, the problem of uneven thickness of the spun nanofiber yarn caused by difficulty in control of the ratio during mixing of the solution can be avoided; the pressure feedback system and the steering engine switching valve are matched with each other, so that the operation is convenient, the process flow is short, and the spun composite nanofiber has structural diversity by setting different pressure thresholds.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (4)
1. An electrostatic spinning double-channel injector is characterized by comprising a shell, a spinning solution input pipe, a cleaning solution input pipe, a solution output pipe, a pressure sensor, a steering engine switching valve and a control system, wherein the spinning solution input pipe and the cleaning solution input pipe are arranged at the top of the shell, and the solution output pipe is arranged at the bottom of the shell; the pressure sensor and the steering engine switching valve are arranged in the shell;
a spinning solution channel and a cleaning solution channel are arranged in the shell, the spinning solution input pipe is connected with the spinning solution channel, and the cleaning solution input pipe is connected with the cleaning solution channel; the two pressure sensors are respectively connected with the spinning solution channel and the cleaning solution channel; the steering engine switching valve is arranged at the bottoms of the spinning solution channel and the cleaning solution channel and can control the on-off state of the spinning solution channel and the cleaning solution channel; a solution bin is arranged below the spinning solution channel and the cleaning solution channel, and the solution output pipe is connected with the solution bin;
the steering engine switching valve comprises a steering engine and a separation plate, the separation plate is connected with the steering engine, and the separation plate can be switched back and forth at the bottoms of the spinning solution channel and the cleaning solution channel so as to plug the spinning solution channel or the cleaning solution channel;
the pressure sensor and the steering engine are respectively connected with the control system.
2. The electrospinning dual channel syringe of claim 1, wherein the pressure sensor is a two-dimensional force sensor that can measure pressure and torque simultaneously.
3. The electrospinning dual channel injector of claim 1, wherein the control system comprises a single chip microcomputer and a control circuit.
4. The use method of the electrostatic spinning double-channel injector as claimed in any one of claims 1-3, is characterized by comprising the following steps:
(1) in the working process, when the injector normally supplies spinning solution, the resistance value of the pressure sensor connected with the spinning solution channel changes along with the transmission rate of the spinning solution;
(2) when the spinning solution channel is blocked, the transmission rate of the spinning solution is reduced, the surface pressure value of a pressure sensor connected with the spinning solution channel is increased, and a control system determines whether to start a steering engine through the pressure sensor so as to switch a partition plate; the control system controls a steering engine switching valve to work, a steering engine in the steering engine switching valve drives a partition plate to change direction according to a angle set by a program, at the moment, a spinning solution channel stops supplying liquid, a cleaning agent is injected into a cleaning solution channel through a cleaning solution input pipe and normally supplies liquid, the cleaning agent washes and cleans a needle tube after flowing out of a solution output pipe, and meanwhile, the conduction condition of an injector during cleaning is fed back to the control system in real time through a pressure sensor connected with the cleaning solution channel, so that the conveying speed of external cleaning agent is controlled;
(3) when the control system judges that the injector is not blocked, the steering engine switching valve is controlled to work, the steering engine is further started, the partition plate is switched to change the direction, the cleaning solution channel stops supplying liquid, the spinning solution channel normally supplies liquid, and the injector normally works.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910203809.7A CN109989120B (en) | 2019-03-18 | 2019-03-18 | Electrostatic spinning double-channel injector and using method thereof |
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| CN201910203809.7A CN109989120B (en) | 2019-03-18 | 2019-03-18 | Electrostatic spinning double-channel injector and using method thereof |
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| CN109989120B true CN109989120B (en) | 2021-09-07 |
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Citations (7)
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| WO2006123858A1 (en) * | 2005-05-18 | 2006-11-23 | Industrial Cooperation Foundation Chonbuk National University | Method of manufacturing mats consisting of nanofibers by electrospinning and mats manufactured thereby |
| WO2010072665A1 (en) * | 2008-12-23 | 2010-07-01 | Basf Se | Modification of nano- or mesofibers or textile fabrics manufactured by way of electrospinning using amphiphilic proteins |
| CN101805932A (en) * | 2010-04-16 | 2010-08-18 | 东华大学 | Electrospinning parallel spinning head device and method thereof |
| CN101967687A (en) * | 2010-09-20 | 2011-02-09 | 北京化工大学 | Multi-row electrostatic spinning spray head |
| CN204509520U (en) * | 2015-02-08 | 2015-07-29 | 福建师范大学 | A kind of Multifunction electrostatic spinning device |
| CN107151824A (en) * | 2017-06-30 | 2017-09-12 | 天津工业大学 | A kind of electrostatic spinneret system based on solid needle spinning appts |
| CN208328184U (en) * | 2018-06-19 | 2019-01-04 | 浙江工业大学之江学院 | A kind of self-cleaning electrostatic spinning nozzle |
-
2019
- 2019-03-18 CN CN201910203809.7A patent/CN109989120B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006123858A1 (en) * | 2005-05-18 | 2006-11-23 | Industrial Cooperation Foundation Chonbuk National University | Method of manufacturing mats consisting of nanofibers by electrospinning and mats manufactured thereby |
| WO2010072665A1 (en) * | 2008-12-23 | 2010-07-01 | Basf Se | Modification of nano- or mesofibers or textile fabrics manufactured by way of electrospinning using amphiphilic proteins |
| CN101805932A (en) * | 2010-04-16 | 2010-08-18 | 东华大学 | Electrospinning parallel spinning head device and method thereof |
| CN101967687A (en) * | 2010-09-20 | 2011-02-09 | 北京化工大学 | Multi-row electrostatic spinning spray head |
| CN204509520U (en) * | 2015-02-08 | 2015-07-29 | 福建师范大学 | A kind of Multifunction electrostatic spinning device |
| CN107151824A (en) * | 2017-06-30 | 2017-09-12 | 天津工业大学 | A kind of electrostatic spinneret system based on solid needle spinning appts |
| CN208328184U (en) * | 2018-06-19 | 2019-01-04 | 浙江工业大学之江学院 | A kind of self-cleaning electrostatic spinning nozzle |
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| CN109989120A (en) | 2019-07-09 |
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