CN107597461B - A kind of magnetic agitation mini sprinkler and micro-nano direct write platform - Google Patents
A kind of magnetic agitation mini sprinkler and micro-nano direct write platform Download PDFInfo
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- CN107597461B CN107597461B CN201710914355.5A CN201710914355A CN107597461B CN 107597461 B CN107597461 B CN 107597461B CN 201710914355 A CN201710914355 A CN 201710914355A CN 107597461 B CN107597461 B CN 107597461B
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Abstract
The present invention relates to magnetic agitation mini sprinkler and micro-nano direct write platforms, magnetic stirring apparatus is set in the structure basis of existing mini sprinkler, discharge outlet is realized by the technical effect of magnetic agitation solution, under the premise of solution stirring, the problems such as polymer solution is easy to precipitate, and polymer solvent is not easy to volatilization, is solved in the electrostatic spray course of work.
Description
Technical field
The present invention relates to a kind of mini sprinklers based on near-field electrostatic spray technique, have more particularly, to one kind to electrostatic
The magnetic agitation mini sprinkler of solution magnetic stirring function used in mist and the micro-nano direct write platform for having the mini sprinkler.
Background technique
With the fast development of nanotechnology, electrospray techniques are gradually applied in micro-, nano material preparation, are utilized
This technology can prepare the nanometer material of the various structures such as nano thin-film, nanofiber, nanotube, nano/micron packing, quantum dot
Material is widely used in chemical analysis, filter membrane, biomaterial, sensor, microelectronic component, meets reinforcing material etc..With tradition
Spray head add the electrostatic atomizer of receiving pole preparing micron and nano particle, since device is too simple, be difficult
It is required at preparation.For example, particle size uniformity control, the requirement of spout low-voltage, powder collection pre-treatment etc. are all greatly limited
System.Especially in pharmaceuticals industry, medicine is carried using friendly Polymer Solution, it is dry through electrostatic spray, diversification, controllable can be prepared
Medicine model is carried, so that electrostatic Spraying technique be made greatly to be paid close attention to.And other industry such as automobile, household electrical appliance, measuring instrument etc.
In the spraying industrial production of shell, the preparation of milk powder, food, drug powder particles, and it is many to crops pesticide spraying etc.
Field researches and develops electrostatic Spraying technique extensively as a kind of technology of key.
Electrostatic atomizer is usually by static nozzle, the three parts such as high voltage power supply and reception device composition.Electrostatic spray makes
Use the non-newtonian fluid (such as glass paste solution) with smaller viscosity as injection object, its working principle is that: polymer is molten
When liquid is transported to a capillary tip with high pressure, electrostatic field can be generated between collecting board and spray head, and in electric field force
Under the action of solution at capillary tip be stretched, form taylor cone.If electric field strength is sufficiently large, electrostatic force is more than drop
When surface tension, drop can occur rupture and generate by spraying.The charge of identical polar is had from the micro-nano drop of spraying injection.Drop
Between repulsive force and electrostatic force, promote drop to continue to refine, so as to form spraying cone.By adjusting polymer solution
The factors such as viscosity and Surface Tension of Liquid Drops, can control the pattern of product, form it into spherical particle.Currently, electrostatic spray
The research and development of modeling and simulating and electrostatic atomizer have been achieved with many achievements, this is provided for the design of the experiment of electrostatic spray
Sufficient experiment condition and theoretical foundation, are conducive to electrostatic Spraying technique and develop to good direction.
However, prepared using electrospray techniques it is micro-, nano material technically there are still some problems, for example, (1) is right
The research for controlling the technologies such as shape, distribution, granularity, the performance of particle is also not enough；The collection of nanoparticle, storage be also it is anxious to
It solves the problems, such as.(2) solution used in electrostatic spray is mostly solid-liquid mixing, such as glass paste solution used, electrostatic spray
Process is slower, and liquid inventory very little, the time used is often up to several hours, so being very easy to produce during the work time
Raw deposited phenomenon, to influence the quality of film.(3) distance is shorter between the electrostatic atomizer and collecting board near field, so that
It is complete that solvent in polymer is difficult the volatilization in injection engineering, therefore is difficult the micro nano structure of tens nanometers of acquisition.
Therefore, in electron spray equipment, agitating function is introduced, realizes particle control, wall surface mixing liquid precipitate and raising
Jeting effect, it is very necessary.
Summary of the invention
The present invention is intended to provide a kind of magnetic agitation mini sprinkler, molten to solve polymer in the existing electrostatic spray course of work
The problems such as liquid is easy to precipitate, and polymer solvent is not easy to volatilization.
Concrete scheme is as follows: a kind of magnetic agitation mini sprinkler, including a shell, which is characterized in that the shell is equipped with pump
Liquid system and stirring system: the pump liquid system includes interconnected inlet tube and outlet tube, and including a liquid pump；It should
Inlet tube has an inlet, which is equipped with first check valve unidirectionally flowed into；The outlet tube has a liquid outlet,
The liquid outlet is equipped with a second one-way valve unidirectionally flowed out, and is communicated with a nozzle needle by the second one-way valve；The liquid pump connects
The inlet tube is passed to, for driving inlet feed liquor and liquid outlet to go out liquid；The stirring system includes rotating electric machine, magnet peace
Sabot, movable magnet and magnetic stirring apparatus；The magnetic stirring apparatus is set to the liquid outlet position, which is installed on
On the shell；The movable magnet is set in the magnet mounting disc, and is provided close to the position of magnetic stirring apparatus；The then magnet
The output shaft of mounting disc and the rotating electric machine is sequentially connected, to rotate under the driving of the latter around a rotation axis.
Further, the inlet of the inlet tube is equipped with a feed liquor branch pipe, which is set to the feed liquor branch pipe
On, and then be set on the inlet by the feed liquor branch pipe；The liquid outlet of the outlet tube is equipped with one second outlet tube, this second
Check valve is set on second outlet tube, and the nozzle needle is set to one end that second outlet tube deviates from liquid outlet；The magnetic agitation
Device is sheathed on second outlet tube.
Further, which includes magnetic stir bar and stirrer pedestal；Magnetic stir bar installation
In on the stirrer pedestal, and the stirrer base sheath is set on second outlet tube and is fixed setting.
Further, which is a piston pump, and the piston pump, inlet tube and outlet tube are sequentially communicated；The inlet
Deviate from one end of outlet tube on the inlet tube, which is set on the outlet tube one end for deviating from inlet tube.
Further, which includes the first protective cover and the second protective cover mutually fastened；The stirring system is set to
In the shell, the inlet tube and outlet tube are set in the shell, which passes through the wall surface of the shell to be set to outside the shell.
It further, further include heating sheet, which is set on the outlet tube, to heat to solution.
Further, which is silica gel heating sheet, and the outer wall of the outlet tube is equipped with interlayer, silica gel heating sheet volume
It is placed in the interlayer of outlet tube at cylinder.
Further, which is bar magnet, which has eight, uniformly distributed by axis of rotation axis,
Constitute four groups of pole pairs.
Further, distance of the bar magnet away from the rotation axis is 15cm.
Magnetic stirring apparatus is arranged in magnetic agitation mini sprinkler of the invention in the structure basis of existing mini sprinkler, realizes
Technical effect of the discharge outlet by magnetic agitation solution solves the electrostatic spray course of work under the premise of solution stirring
The problems such as middle polymer solution is easy to precipitate, and polymer solvent is not easy to volatilization.
Meanwhile in further technical solution, magnetic stirring apparatus of the present invention in number of magnetic pole pairs pair of having analyzed and researched
On the basis of mixing effect influences, the stirring system of optimization is proposed, mixing effect is more preferable.
Detailed description of the invention
Fig. 1 shows structural schematic diagram of the embodiment of the present invention；
Front view after removing the second protective cover Fig. 2 shows Fig. 1；
Fig. 3 shows the cross-sectional view of Fig. 1；
Fig. 4 shows pump liquid system front view in Fig. 1；
The variation diagram of torque when Fig. 5 a shows the embodiment of the present invention two to pole pair；
The variation diagram of torque when Figure 5b shows that the embodiment of the present invention three to pole pair；
The variation diagram of torque when Fig. 5 c shows the embodiment of the present invention four to pole pair；
Fig. 6 a shows distribution of static magnetic field figure when pole pitch 25mm of the embodiment of the present invention；
Fig. 6 b shows distribution of static magnetic field figure when pole pitch 20mm of the embodiment of the present invention；
Fig. 6 c shows distribution of static magnetic field figure when pole pitch 15mm of the embodiment of the present invention；
When Fig. 7 shows the embodiment of the present invention for micro- spraying equipment, operation principle schematic diagram.
Specific embodiment
To further illustrate that each embodiment, the present invention are provided with attached drawing.These attached drawings are that the invention discloses one of content
Point, mainly to illustrate embodiment, and the associated description of specification can be cooperated to explain the operation principles of embodiment.Cooperation ginseng
These contents are examined, those of ordinary skill in the art will be understood that other possible embodiments and advantages of the present invention.In figure
Component be not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
Now in conjunction with the drawings and specific embodiments, the present invention is further described.
In conjunction with Fig. 1 to Fig. 4, which provides a kind of magnetic agitation mini sprinkler, which includes a shell, the shell
It is interior to be equipped with pump liquid system and stirring system:
The shell includes the first protective cover 1 and the second protective cover 2 mutually fastened, and the two constitutes a cylindric closing
Cavity；The stirring system is set in the shell, which is set in the shell.
The pump liquid system includes the piston pump 7, inlet tube 16 and outlet tube 3 being sequentially communicated:
One end of the deviated from outlet tube 3 of inlet tube 16 has an inlet, which is equipped with a feed liquor branch pipe 4,
The feed liquor branch pipe 4 is equipped with the first check valve 5, so that solution one unidirectionally flows into the inlet tube 16；The outlet tube 3 deviate from into
One end of liquid pipe 16 has a liquid outlet, which is equipped with one second outlet tube 13, which, which is equipped with, uses
In the second one-way valve that control solution unidirectionally flows out, and second outlet tube 13 is equipped with a nozzle needle 6 away from one end of liquid outlet, should
Nozzle needle 6 is connected to outlet tube 3 by the second one-way valve.
The piston pump 7 is connected to the inlet tube as liquid pump, by draw operation, to realize inlet feed liquor or liquid outlet
Liquid out.
The stirring system includes rotating electric machine 10, magnet mounting disc 9, the movable bar magnet 8 of energy and magnetic agitation dress
It sets, which includes magnetic stir bar 14 and stirrer pedestal 15:
The magnet mounting disc 9 is set on the output shaft of the rotating electric machine 10, which is set to the magnet mounting disc 9
On, and it is provided close to the position of magnetic stir bar 14；The magnetic stir bar 14 is installed on the stirrer pedestal 15, and the stirring
Sub- pedestal 15 is sheathed on second outlet tube 13 and is fixed setting；Then drive of the magnet mounting disc 9 in rotating electric machine 10
Around motor shaft, i.e. rotation axis under dynamic, rotation makes magnetic stir bar 14 generate changes of magnetic field.
In this embodiment, which has eight, uniformly distributed by circumference of rotation axis, constitutes four groups of magnetic poles
Right, the length direction of the bar magnet 8 is tangential to its rotary motion direction；Preferably, the bar magnet 8 is away from the rotation axis
Distance is 15cm.
First protective cover 1 and 2 two parts of the second protective cover composition, the two cooperatively form one for mounting rotary electric machine 10
Carrier aircraft slot 11, the top of two protective covers are connect there are two through-hole with carrier aircraft slot 11 respectively, and rotating electric machine 10 is set to carrier aircraft
In slot 11；There are multiple through-holes in the bottom surface of first protective cover 1, respectively corresponds inlet tube 16, feed liquor branch pipe 4 and the second outlet tube
13；Motor 10 is placed in carrier aircraft slot 11, and 9 center of magnet mounting disc has a circular hole and the shaft of motor 10 to link together,
Bar magnet 8 is fixed in magnet mounting disc 9, and magnetic stir bar 14 is placed on stirrer pedestal 15, and stirrer pedestal 15 is put
It sets in the bottom of outlet tube 3.
There is an interlayer on the outlet tube 3, the silica gel heating sheet 12 as heating sheet is rolled into cylinder and is placed on outlet tube 3
In interlayer.Inlet tube 2 has a hollow cylinder, cooperates with piston pump 7, and 2 front end of inlet tube is analog-U shaped pipeline, and there is screw thread in tail portion,
For the cooperation with outlet tube 3.First protective cover 1 of composition mini sprinkler, carrier aircraft slot 11, motor 10, magnet mounting disc 9 are stirred
Sub- pedestal 15 is mixed, outlet tube 3 and nozzle needle 6 are all coaxial inner conductor；The outlet tube 3 and inlet tube 16 of mini sprinkler should be close by screw thread
Cooperation；The oil resistant check valve of the resistance to ozone specification connecting with inlet and liquid outlet is 4mm, described to place stirring for magnetic stir bar 14
Sub- pedestal 15 is mixed, internal diameter should be slightly bigger than the length of magnetic stir bar 14.
In conjunction with Fig. 5 a to Fig. 5 c:
In mini sprinkler device when the quantity difference of bar shaped magnetic pole 8, the magnetic field strength around magnetic stir bar 14 is variation.
The magnetic field around magnetic stir bar is analyzed by simulation software, the domain of air-shed and solution is first drawn, secondly utilizes
Difference set removal magnet and air-shed intersection in brewer operation.Grid is carried out respectively to rotating part and stationary part to cut open
Point, after completing mesh generation, the direction of magnetization is arranged to each magnet respectively, the intensity of magnetization of magnet is set as 900KA/m.It carries out
Stable state and Transient, the figure that stirrer Moment changes over time when Distribution of Magnetic Field and magnetic pole when obtaining static rotate
Picture.
(1) under quiescent conditions: when number of magnetic pole pairs are three, the magnetic field around magnetic stir bar is most strong, and more uniformly.When
When for two pairs of magnetic poles, the magnetic field strength of magnetic stir bar near zone is lower.When number of magnetic pole pairs are four, due between magnet away from
From closely causing magnetic field mutually to weaken very much, the magnetic field around magnetic stir bar instead than three pairs of magnetic poles when come it is weak.
(2) when magnetic pole rotates, electromagnetism rotating is equal to mechanical separator speed multiplied by number of magnetic pole pairs.When mechanical separator speed remains unchanged,
Due to the increase of number of magnetic pole pairs, the changes of magnetic field speed of stirrer surrounding space increases, therefore in the same time, wave crest occurs
Number be scaling up, field frequency accelerate.The size that number of magnetic pole pairs p=2/3/4 respectively corresponds torque average value is
0.0152,0.0193,0.0188.As can be seen that increasing when torque average value opposing polarities logarithm p=2 when number of magnetic pole pairs p=3
Add it is larger, but the torque average value of number of magnetic pole pairs p=4 relative to number of magnetic pole pairs p=3 value slightly reduce.Number of magnetic pole pairs p=3
When, torque average value is maximum.
It can be seen that magnetostatic field simulation result and Transient the result is that match, torque suffered by magnetic stir bar
Size is neither proportional with number of magnetic pole pairs, also not inversely.So in mini sprinkler device, outside magnetic stir bar
When three pairs of strong magnetic bar magnets are arranged in face, device working efficiency highest.
In conjunction with shown in Fig. 6 a to Fig. 6 c: when bar magnet 8 arrives the distance difference of rotation axis in the mini sprinkler device,
The rotates effe of magnetic stir bar 14 is different.For this purpose, magnetic force when distribution of static magnetic field and magnet movement when to different distance
Torque suffered by stirrer carries out finite element simulation.In view of the limitation of the diameter of internal outlet tube, choose respectively away from
It is emulated from 15mm, 20mm, 25mm.As shown in fig. 6, in the distribution map of magnetostatic field, magnet is from center under three kinds of pole pitch
Axis is closer, and the spatial color near magnetic stir bar is more shallow, and the magnetic field strength near magnetic stir bar is bigger.Under Transient
Corresponding average torque size is 0.0193,0.0164,0.0158 under 15mm, 20mm, 25mm distance, it can be seen that wink
The result of state emulation matches with magnetostatic field simulation result, and in existing distance range, magnet is closer from magnetic stir bar, is produced
Raw average torque is bigger.So it is the most suitable that magnet is set to 15mm with a distance from central axis.
As shown in fig. 7, being using the course of work of the above-mentioned mini sprinkler with stirring and heating function:
When work, mini sprinkler of the present invention is mounted on high speed and precision X-Y two-dimension moving platform, and and high voltage power supply
17 (such as 1kv is adjustable), precise injection pump 18, collecting board 19, pattern generator form micro-nano direct write platform.Complete nozzle needle 6
After the adjustment of initial position, external precision syringe pump 18 is connect with piston 7, and inlet is placed in glass paste solution 20.
The high voltage power supply being connected with nozzle needle 6 is opened, pictcure generator generates graphics command, controls two-dimension moving platform
Motion profile.In work, the anode of high voltage power supply is connected with nozzle needle 6, and cathode connects collecting board.Motor drive is fixed on rotation
Bar magnet 8 on bar rotates, and causes the magnetic field around magnetic stir bar 14 to make cyclically-varying, to make the magnetic force in solution
Stirrer 14 rotates, and realizes agitating function；Silica gel heating sheet 12 is rolled into cylinder and is placed in the interlayer of outlet tube 3, can
Solution is heated.The process and motion platform coordinative role, the collection of achievable micro-nano deposited samples.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
It is white, it is not departing from the spirit and scope of the present invention defined by the appended claims, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (10)
1. a kind of magnetic agitation mini sprinkler, including a shell, which is characterized in that the shell is equipped with pump liquid system and stirring system
System:
The pump liquid system includes interconnected inlet tube and outlet tube, and including a liquid pump；
The inlet tube has an inlet, which is equipped with first check valve unidirectionally flowed into；The outlet tube has one
Liquid outlet, which is equipped with a second one-way valve unidirectionally flowed out, and is communicated with a nozzle needle by the second one-way valve；
The liquid pump is connected to the inlet tube, for driving inlet feed liquor and liquid outlet to go out liquid；
The stirring system includes rotating electric machine, magnet mounting disc, movable magnet and magnetic stirring apparatus；The magnetic stirring apparatus
Set on the liquid outlet position, which is installed on the shell；The movable magnet is set in the magnet mounting disc, and is set to
Close to the position of magnetic stirring apparatus；The output shaft of the then magnet mounting disc and the rotating electric machine is sequentially connected, in the latter
Driving under around a rotation axis rotate.
2. magnetic agitation mini sprinkler according to claim 1, it is characterised in that: the inlet of the inlet tube be equipped with one into
Liquid branch pipe, first check valve are set on the feed liquor branch pipe, and then are set on the inlet by the feed liquor branch pipe；
The liquid outlet of the outlet tube is equipped with one second outlet tube, which is set on second outlet tube, and the spray
Needle is set to one end that second outlet tube deviates from liquid outlet；
The magnetic stirring apparatus is sheathed on second outlet tube.
3. magnetic agitation mini sprinkler according to claim 2, it is characterised in that: the magnetic stirring apparatus includes magnetic agitation
Son and stirrer pedestal；The magnetic stir bar is installed on the stirrer pedestal, and the stirrer base sheath be set to this second
On outlet tube and it is fixed setting.
4. magnetic agitation mini sprinkler according to claim 1, it is characterised in that: the liquid pump be a piston pump, the piston pump,
Inlet tube and outlet tube are sequentially communicated；The inlet is set on the inlet tube one end for deviating from outlet tube, which is set to
Deviate from one end of inlet tube on the outlet tube.
5. magnetic agitation mini sprinkler according to claim 1, it is characterised in that: the shell includes that first mutually fastened protects
Shield and the second protective cover；The stirring system is set in the shell, and the inlet tube and outlet tube are set in the shell, the liquid
The wall surface across the shell is pumped to be set to outside the shell.
6. magnetic agitation mini sprinkler according to claim 1, it is characterised in that: further include heating sheet, which is set to
On the outlet tube, to be heated to solution.
7. magnetic agitation mini sprinkler according to claim 6, it is characterised in that: the heating sheet is silica gel heating sheet, should be gone out
The outer wall of liquid pipe is equipped with interlayer, which is rolled into cylindrical be placed in the interlayer of outlet tube.
8. magnetic agitation mini sprinkler according to claim 1, it is characterised in that: the movable magnet is bar magnet, this
Shape magnet has eight, uniformly distributed by axis of rotation axis, constitutes four groups of pole pairs.
9. magnetic agitation mini sprinkler according to claim 8, it is characterised in that: the bar magnet away from the rotation axis away from
From for 15cm.
10. a kind of micro-nano direct write platform, including X-Y two-dimension moving platform, high voltage power supply, precise injection pump, collecting board and
Pattern generator, which is characterized in that it further include magnetic agitation mini sprinkler described in claim 1-9 any claim, it is accurate
Syringe pump is connected with liquid pump, which is set on the X-Y two-dimension moving platform, the collecting board and nozzle needle point
It is not electrically connected with the two poles of the earth of high voltage power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710914355.5A CN107597461B (en) | 2017-09-30 | 2017-09-30 | A kind of magnetic agitation mini sprinkler and micro-nano direct write platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710914355.5A CN107597461B (en) | 2017-09-30 | 2017-09-30 | A kind of magnetic agitation mini sprinkler and micro-nano direct write platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107597461A CN107597461A (en) | 2018-01-19 |
| CN107597461B true CN107597461B (en) | 2019-05-17 |
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| CN201710914355.5A Expired - Fee Related CN107597461B (en) | 2017-09-30 | 2017-09-30 | A kind of magnetic agitation mini sprinkler and micro-nano direct write platform |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109822882A (en) * | 2019-03-20 | 2019-05-31 | 天津工业大学 | A kind of part modification biochemical molecular layer method for micro sensor devices |
| CN113510015A (en) * | 2021-07-29 | 2021-10-19 | 厦门大学 | Novel micro-nano spray head |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1873064A (en) * | 2006-06-30 | 2006-12-06 | 北京化工大学 | Directional magnetic electrical spinning Nano fibers, preparation method and equipment needed |
| CN101032788A (en) * | 2007-04-28 | 2007-09-12 | 罗键 | Consumable electrode surfacing method of electromagnetic complex field, and the device and extension application thereof |
| CN201921818U (en) * | 2010-12-31 | 2011-08-10 | 创维液晶器件(深圳)有限公司 | Glue dispensing device |
| CN105977020A (en) * | 2016-06-21 | 2016-09-28 | 闽江学院 | Fiber capacitor and preparation method thereof |
| CN205833077U (en) * | 2016-03-29 | 2016-12-28 | 贵州华晨海棉有限公司 | A kind of mixing arrangement for sponge production line |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5792652B2 (en) * | 2012-02-07 | 2015-10-14 | 武蔵エンジニアリング株式会社 | Stirring device, discharge device including the same, and discharge method |
-
2017
- 2017-09-30 CN CN201710914355.5A patent/CN107597461B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1873064A (en) * | 2006-06-30 | 2006-12-06 | 北京化工大学 | Directional magnetic electrical spinning Nano fibers, preparation method and equipment needed |
| CN101032788A (en) * | 2007-04-28 | 2007-09-12 | 罗键 | Consumable electrode surfacing method of electromagnetic complex field, and the device and extension application thereof |
| CN201921818U (en) * | 2010-12-31 | 2011-08-10 | 创维液晶器件(深圳)有限公司 | Glue dispensing device |
| CN205833077U (en) * | 2016-03-29 | 2016-12-28 | 贵州华晨海棉有限公司 | A kind of mixing arrangement for sponge production line |
| CN105977020A (en) * | 2016-06-21 | 2016-09-28 | 闽江学院 | Fiber capacitor and preparation method thereof |
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Granted publication date: 20190517 Termination date: 20200930 |