CN217392344U - Device for preparing magnetic nanofluid through ultrasonic spraying - Google Patents

Abstract

The utility model discloses a device of supersound spraying preparation magnetism nanofluid, including stoste container, motor stirring module, supersound spraying module, circuit control module, temperature control module, reaction tank, screening collection module, pneumatic stirring module and exhaust emission module. The advantages are that: the utility model can quickly and efficiently obtain relatively stable nano-particle dispersion liquid by the methods of mechanical stirring assistance, ultrasonic spraying and repeated folding and unfolding of the air pump; after the operation parameters are set by a user, the single chip microcomputer is used for automatically stirring, heating and ultrasonically spraying, hands of experimenters are liberated, and time cost is saved; the reaction tank is provided with a plurality of ultrasonic dispersion injection ports and is suitable for composite preparation of various materials; the mode of a blowing-pumping type gas stirring aerosol system is more energy-saving and environment-friendly; the magnetic force of the permanent magnets on the particles is placed so that the finished particles counteract the gravitational effect, thereby depositing impurities.

Description

Device for preparing magnetic nanofluid through ultrasonic spraying

Technical Field

The utility model relates to a device for preparing magnetic nano fluid by ultrasonic spraying.

Background

The exploration of functional nanoparticles becomes the focus of current research, and ultrafine particles show obvious quantum effect and small size effect due to the nanometer level of particle size and have unique physicochemical properties. The application of nano fluid in the fields of industry, medicine and daily chemicals is increasing continuously, and the nano fluid is a novel material with important value.

The nanometer fluid is prepared by uniformly dispersing nanometer particles in a solvent, has the special properties of the nanometer particles and liquid fluidity, can improve the heat transfer efficiency by the heat transfer coupling of the fluid and the nanometer solid particle interface, and is an excellent heat transfer working medium. The preparation of the nanofluid mainly comprises a one-step method and a two-step method. The one-step method is as follows: the dispersion of the particles is completed while the nanoparticles are prepared, but the steps of impurity removal, particle wrapping and dispersion in a specific experiment are complicated. The two-step method comprises the following steps: firstly, pure nano particles are prepared, then the nano particles and a dispersing agent are added into a solvent according to a certain proportion, stirring, curing and ultrasonic dispersion are carried out, the preparation time is long, the steps are complicated, the control is not easy, the particles are easy to agglomerate, and the stability is poor.

Because of the large specific surface area of the nano-particles, a large number of unsaturated bonds and dangling bonds exist, and the nano-particles have active chemical properties. These nanoparticles readily adsorb and agglomerate each other. The general treatment methods include:

the mechanical ball milling method is characterized in that the dispersing agent fully wraps the nano particles by impacting, extruding, shearing and rubbing the aggregate through a high-speed rotating steel ball, and the particles are prevented from being aggregated again. The advantages of mechanical ball milling are high yield, simple process, easy control, expensive equipment and high energy consumption.

The surface modification method uses surfactant to change the gas-liquid, solid-liquid surface tension in the powder dispersion system, and forms a coating layer on the particle surface to reduce the surface energy and disperse the separated particles.

The ultrasonic dispersion method utilizes the crushing effect of shock waves and micro-jet generated by ultrasonic cavitation to realize the dispersion of agglomerated particles, but the collision of the particles is accelerated due to the overhigh ultrasonic dispersion temperature, and the particles are further agglomerated.

The vapor deposition method includes two types, i.e., a vapor chemical deposition method and an atomized droplet deposition method. The vapor phase chemical deposition method is that chemical reaction is carried out in vapor phase to generate modified impurity molecules, and the modified impurity molecules are deposited on the surface of particles and chemically bonded with surface molecules. Forming a modified inclusion; the atomized liquid drop deposition method is to atomize and disperse the modifier on the particle surface directly, and to deposit the modifier on the particle surface through heating, dehydration and solidification to form surface coating. High-temperature heating equipment is required, and exhaust gas purification treatment is required.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device for preparing magnetic nanometer fluid by ultrasonic spraying, which solves the technical problem of preparing the magnetic nanometer fluid and solves the problem that the traditional nanometer fluid dispersion technology can only prolong the grinding time according to experience on the control of particle size or accelerate the reaction rate to inhibit the crystal growth; the dispersion process is extremely complicated and long, long-time mechanical stirring and strict temperature control curing are needed, the final ultrasonic dispersion often cannot break agglomerated particles, and precipitation and agglomeration are easy to occur in a short time.

The device for preparing the magnetic nanofluid by ultrasonic spraying comprises a stock solution container, a motor stirring module, an ultrasonic spraying module, a circuit control module, a temperature control module, a reaction tank, a screening and collecting module, a pneumatic stirring module and a waste gas discharging module;

the reaction tank is arranged on the ground, the stock solution container is clamped at the upper part of the reaction tank, the lower part of the stock solution container extends into the reaction tank, the stock solution container is divided into an upper part and a lower part which are mutually embedded, namely a stock solution container upper cover and a stock solution container body, the motor stirring module is arranged on the stock solution container upper cover, and the motor stirring module extends into the stock solution container body; the ultrasonic spraying module is partially arranged on the upper cover of the stock solution container, the other part of the ultrasonic spraying module is arranged on the body of the stock solution container, the temperature control module is arranged on the upper cover of the stock solution container, and the temperature control module partially extends into the stock solution container; a dispersant atomization injection port, a pneumatic stirring port and a functional modification material atomization injection port are formed in the side wall of the reaction tank; the screening and collecting module is arranged on the ground and is communicated with the reaction tank through a pipeline; the pneumatic stirring module is connected with a pneumatic stirring port of the reaction tank through a pipeline; the waste gas discharging module consists of a gas check safety valve arranged at the bottom of the original liquid container body and an exhaust valve arranged on the upper cover of the original liquid container; the circuit control module is arranged on the upper cover of the stock solution container and is electrically connected with the motor stirring module, the ultrasonic spraying module, the temperature control module and the pneumatic stirring module.

The utility model discloses technical scheme, preparation and dispersion devices of ultrasonic spray nano-particle use the dispersed method of ultrasonic spray, with the granule, dispersant and solvent are from different filling openings atomizing injection reaction tank, wherein nanoparticle and base liquid intensive mixing under the circumstances that agitator auxiliary stirring and argon gas were blown in, atomize into vaporific liquid drop through ultrasonic spray module, at the coupling through dispersant parcel and other functional material (like carbon nanotube), drum well intensive dispersion repeatedly at argon gas, form the aerosol system, in screening pond, be rich in magnetic particle system because can not the deposit keep the aerosol state by the magnetic field force, unnecessary material only receives gravity deposit to retrieve. The ultrasonic instant high temperature and high pressure breaks agglomerated particles into a large number of suspended tiny particles, and suspended dispersant liquid drops can be uniformly attached to the surfaces of the particles, so that the drum-pumping gas stirring method saves raw materials more, avoids the generation of a large amount of waste gas, is energy-saving and environment-friendly, and compared with other methods, has the advantages of high speed, particle agglomeration elimination, uniform particle size, small device size, simplicity in manufacturing, capability of screening finished products by using a magnetic field, low cost, low energy consumption, convenience in cleaning and the like.

The utility model discloses technical scheme through circuit control module, can adjust stirring speed, controls the oscillation frequency of ultrasonic spray, and the temperature of control mixture realizes the atomization effect to the different base members of water, oil, mellow wine to and research stirring speed, ultrasonic vibration frequency, temperature influence the particle diameter of granule.

To the utility model discloses technical scheme's preferred, the stoste container upper cover is the upper cover container body that upper end opening lower extreme is sealed, sets up the upper plate of sealed usefulness at the upper end opening part of the upper cover container body. The stock solution container adopts a split structure, and the stock solution container upper cover and the stock solution container body are convenient to feed and clean due to the split structure.

It is right to the utility model discloses technical scheme's preferred, circuit control module includes control circuit board and switch, and control circuit board adorns on the upper plate of stoste container upper cover, and switch adorns on the outer wall of the upper cover container body.

It is right to the utility model discloses technical scheme's preferred, motor stirring module includes motor and stirring rake, and the motor dress is on the bottom plate of the upper cover container body, and the motor shaft of motor runs through the bottom plate of the container body and stretches out, and the stirring rake passes through the shaft coupling dress on the motor shaft of motor, and the stirring rake stretches into in the stoste container body, stirs the internal particulate matter and the base fluid that hold of stoste container, and motor electricity connection control circuit board.

For the optimization of the technical scheme of the utility model, the ultrasonic spray module comprises an ultrasonic spray drive plate, a spring thimble and a plurality of ultrasonic spray vibrating reeds, the ultrasonic spray drive plate is electrically connected with the control circuit board, the ultrasonic spray drive plate is arranged on the upper plate, the spring thimble is of a pull-plug type structure, the wire of the ultrasonic spray drive plate is connected with one part of the spring thimble, and one part of the spring thimble is arranged in the upper cover container body; the ultrasonic spraying vibrating reeds are arranged on through holes formed in the container wall at the lower part of the stock solution container, vibrating wires of the ultrasonic spraying vibrating reeds penetrate into a wire protective sleeve arranged on the stock solution container body and are welded with the other part of the spring ejector pins, the wire protective sleeve is arranged on the outer side wall of the stock solution container body, and the other part of the spring ejector pins is arranged on the outer side wall of the stock solution container body and is positioned at the opening end of the stock solution container body.

It is right to the utility model discloses technical scheme's preferred, temperature control module includes unipolar heating rod and temperature probe, and unipolar heating rod hangs in the container bottom and the electric connection control circuit board of stoste container upper cover, and it is internal that unipolar heating rod stretches into the stoste container, and temperature probe hangs in the container bottom and the electric connection control circuit board of stoste container upper cover, and temperature probe stretches into the stoste container internally.

Preferably, the screening and collecting module comprises a screening and collecting tank and a magnetic block, the magnetic block is arranged in the screening and collecting tank, and the screening and collecting tank is communicated with the reaction tank through a pipeline; the wall of the screening and collecting tank is provided with a magnetic material collecting port and a residual material collecting port.

It is right to the utility model discloses technical scheme's preferred, pneumatic stirring module includes that argon gas jar, check valve, piston pump, gas pitcher, throttle check valve and pneumatic stirring connect, and pneumatic stirring connects the dress on the pneumatic stirring mouth of reaction tank, and gas piping connection between argon gas jar, piston pump, gas pitcher and the pneumatic stirring connects, and the check valve dress is on the gas piping between argon gas jar and piston pump, and the throttle check valve dress is on the gas piping between gas pitcher and the pneumatic stirring connects, and piston pump electricity connection control circuit board.

The ultrasonic spray driving plate and the ultrasonic spray vibrating plate mentioned in the technical scheme of the utility model are commercially available parts and are directly purchased; the spring thimble is a commercially available part and is directly purchased; the uniaxial heating rod and temperature probe were commercially available parts and were obtained directly.

Compared with the prior art, the utility model, its beneficial effect is:

the device of the utility model can rapidly and efficiently obtain relatively stable nano-particle dispersion liquid by mechanical stirring assistance, ultrasonic spraying and repeated folding and unfolding of the air pump; after the operation parameters are set by a user, the single chip microcomputer is used for automatically stirring, heating and ultrasonically spraying, hands of experimenters are liberated, and time cost is saved; the reaction tank is provided with a plurality of ultrasonic dispersion injection ports and is suitable for composite preparation of various materials; the mode of a blowing-pumping type gas stirring aerosol system is more energy-saving and environment-friendly; the magnetic force of the permanent magnet on the particles is placed to counteract the gravitational effect of the finished particles, thereby depositing impurities.

The utility model discloses the device, circuit control module can adjust stirring speed, controls ultrasonic nebulizer's oscillation frequency, controls the temperature of the mixture, realizes the atomization effect to different bases of water, oil, mellow wine to and research stirring speed, ultrasonic vibration frequency, temperature to the particle diameter influence of granule; the method is suitable for the fields of school teaching, experiments, nanofluid preparation and the like.

The utility model discloses a device, from experimenter's experience to carry out utility model design, have higher user experience, measure from the interpolation of raw materials to final equipment cleaning with safe convenient as the design theory, the utility model discloses a circuit board design has the burn record interface, and experimenters can write the operation procedure according to self demand; the method can be suitable for different scenes of laboratories, factories and the like.

Drawings

Fig. 1 is an outline view of an apparatus for preparing a magnetic nanofluid by ultrasonic spraying of example 1.

Fig. 2 is a circuit diagram of the control circuit board.

Fig. 3 is a front view of the upper plate.

Fig. 4 is a back view of the upper plate.

Fig. 5 is a perspective view schematically illustrating an upper-lid container body.

Fig. 6 is a perspective view of the bottom panel of the upper lid container body.

Fig. 7 is a perspective view of the raw liquid container body (in the figure, an ultrasonic spray vibration sheet is attached).

Fig. 8 is a plan view of a structure of an ultrasonic spray vibration piece.

FIG. 9 is a block diagram of a pneumatic stirring module.

Detailed Description

The technical solution of the present invention is explained in detail below, but the scope of protection of the present invention is not limited to the embodiments.

In order to make the disclosure of the present invention more comprehensible, the following description is further made in conjunction with the accompanying drawings 1 to 9 and the detailed description.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1:

as shown in fig. 1, an apparatus for preparing magnetic nanofluid by ultrasonic spraying includes a stock solution container, a motor stirring module, an ultrasonic spraying module, a circuit control module, a temperature control module, a reaction tank 17, a sieving and collecting module, a pneumatic stirring module, and an exhaust emission module.

As shown in fig. 1, the reaction tank 17 is placed on the ground, the raw liquid container is clamped on the upper part of the reaction tank 17, the lower part of the raw liquid container extends into the reaction tank 17, the raw liquid container is divided into an upper part and a lower part which are mutually embedded, namely a raw liquid container upper cover 1 and a raw liquid container body 11, the motor stirring module is arranged on the raw liquid container upper cover 1, and the motor stirring module part extends into the raw liquid container body 11; the ultrasonic spraying module is partially arranged on the upper cover 1 of the stock solution container, the other part of the ultrasonic spraying module is arranged on the body 11 of the stock solution container, the temperature control module is arranged on the upper cover 1 of the stock solution container, and the temperature control module partially extends into the body 11 of the stock solution container; the side wall of the reaction tank 17 is provided with a dispersant atomization injection port 18, a pneumatic stirring port 20 and a functional modification material atomization injection port 19; the screening and collecting module is arranged on the ground and is communicated with the reaction tank 17 through a pipeline; the pneumatic stirring module is connected with a pneumatic stirring port 20 of the reaction tank 17 through a pipeline; the waste gas discharging module consists of a gas check safety valve 14 arranged at the bottom of the original liquid container body 11 and an exhaust valve 6 arranged on the upper cover 1 of the original liquid container; the circuit control module is arranged on the upper cover 1 of the stock solution container and is electrically connected with the motor stirring module, the ultrasonic spraying module, the temperature control module and the pneumatic stirring module.

The circuit control module comprises a control circuit board 2 and a power switch 4, wherein the control circuit board 2 is arranged on the upper plate of the upper cover 1 of the stock solution container, and the power switch 4 is arranged on the outer wall surface of the container body of the upper cover. The circuit control module uses ATMege32 control chip, 1602 LCD, L298N motor driving chip, and can realize automatic control of heating temperature, ultrasonic frequency and device operation time through programming.

As shown in fig. 2, the control circuit board 2 of the present embodiment is controlled by an AT mega single chip, and mainly includes a voltage converter converting 220V to 12V, a voltage regulator chip converting 12V to 5VMC7805CT for supplying power to the control chip ATmega32, a liquid crystal display 1602 for displaying the operation status of the device, a relay for supplying power to a heating rod, and four input buttons for a user: set, Ok, +, -facilitate user operation. The L298N motor driving chip accurately controls the motor speed, an ISP-8 program burning interface, and a user can customize an equipment operation program.

The circuit control module of this embodiment adjusts stirring rate, controls ultrasonic nebulizer's oscillation frequency, and the temperature of control mixture realizes the atomization effect to the different bases of water, oil, alcohol to and research stirring rate, ultrasonic vibration frequency, temperature are to the particle size influence of granule.

This embodiment device is applicable to fields such as school's teaching, experiment and nanometer fluid preparation.

As shown in fig. 1, in the embodiment, the raw liquid container adopts a split structure, and the upper cover and the body of the raw liquid container are convenient for charging and cleaning. The upper cover 1 of the stock solution container is a container body with an opening at the upper end and a sealed lower end, and an upper plate for sealing is arranged at the opening at the upper end of the container body. The space in the container body can be provided with the parts required by the device.

Further, in this embodiment, stoste container adopts split type structure, and the convenience is convenient for observe and show when the experiment of school teaches, helps the experiment teaching.

As shown in FIGS. 3 and 4, in this embodiment, the upper lid 1 of the raw liquid container is an upper lid container body 1-11 having an open upper end and a sealed lower end, and an upper plate 1-1 for sealing is provided at the open upper end of the upper lid container body 1-11.

As shown in figures 4 and 6, the upper plate 1-1 and the upper cover container body 1-11 are made of ABS engineering plastics, and the upper cover container body 1-11 is connected with the screw hole 1-4 on the upper plate 1-1 through a stud 1-19 to seal the upper cover 1 of the stock solution container.

As shown in FIGS. 3 and 4, the upper plate 1-1 has a circular shape, and in the present embodiment, it is preferable that the upper plate 1-1 has a diameter of 13.5cm and a thickness of 1.5 mm. The upper plate 1-1 is provided with a liquid crystal display window 1-2 and three button holes 1-3, and the back of the upper plate 1-1 is provided with circuit control board fixing studs 1-17 and fixing clips 1-18 of an ultrasonic spray drive board 3.

As shown in fig. 5 and 6, the upper lid container body 1-11 is a hollow cylinder with an upper end opened, and the upper lid container body 1-11 designed in this embodiment is preferably sized to have a height of 15cm, an inner diameter of 13.6cm, and a thickness of 1.5 mm. The outer diameter of the 1.8cm position of the bottom of the upper cover container body 1-11 is contracted to 12cm and sleeved with a rubber ring 1-9, the contracted part of the bottom of the upper cover container body 1-11 is provided with a bayonet 1-8, and the bayonet 1-8 is locked and sealed with a tooth buckle at the upper end edge opening of the raw liquid container body 11 of the device to prevent gas leakage. As shown in fig. 1.

As shown in fig. 5 and 6, the opening of the bottom of the upper-lid container body 1-11 comprises: the central stirring paddle is provided with an opening 1-10, the heating rod is provided with an opening 1-16, the temperature measuring probe is provided with an opening 1-13 and the exhaust pipe is provided with an opening 1-15, the bottom of the upper cover container body 1-11 is provided with an opening 1-14 of a conductive elastic sheet, the side surface of the upper cover container body 1-11 is provided with an opening 1-12 of an exhaust valve, an output section 1-5 of a DIN6 needle female head, an opening 1-7 of a power line and an opening 1-6 of a power switch.

As shown in FIG. 5, the power cord enters the upper plate 1-1 from the power cord opening 1-7 and is connected with the power switch 4 through the conducting wire, the power switch 4 is fixed in the power switch opening 1-6, and the opening size of the power switch opening 1-6 in the embodiment is 30.5mm long and 25.5mm wide.

As shown in fig. 5, the single-axis heating rod 10 in the temperature control module of this embodiment is a single-end heating tube with a length of 15cm, a diameter of 8mm, and a heating portion with a length of 3cm, and the single-axis heating rod 10 is sealed in the openings 1-16 of the heating rod by using a high temperature resistant glue. The temperature probe 9 is an 18B20 temperature sensor, a thermal resistance temperature control probe, the length of the thermal resistance temperature control probe is 15cm, the diameter of a thread is M12 x 1, the inner side of the opening 1-13 of the temperature measurement probe is fixed by a rubber ring, and the outer side of the opening is fixed by a gasket and a nut. The wires of the uniaxial heating rod 10 and the temperature probe 9 are connected to the control circuit board 2 in the circuit control module. As shown in fig. 2.

As shown in fig. 4, the ultrasonic spray drive plate 3 in the ultrasonic spray module of this embodiment is fixed on the spray drive plate fixing clips 1 to 18 of the upper plate 1 to 1, the ultrasonic spray drive plate 3 is connected to the spring thimble 7 through a single line, and the spring thimble 7 is fixed at the positions of the openings 1 to 14 of the conductive elastic sheet by a sealant.

As shown in FIG. 5, the exhaust pipe openings 1-15 and the exhaust valve openings 1-12 of the upper lid container bodies 1-11 are opened by using a PPR right-angled internally threaded elbow pipe, and the seams are sealed.

As shown in FIG. 7, the raw liquid container body 11 is made of PC material, and in this embodiment, the raw liquid container body 11 is preferably a cylindrical body with an inner diameter of 12.2cm and a height of 17cm at the upper part of the raw liquid container body 11; the lower part is hemispherical, and the bottom of the sphere is provided with 3 round holes with the diameter of 2cm for mounting the ultrasonic spray vibrating sheet 16.

As shown in figures 1 and 7, a mounting gas check safety valve 14 is arranged on the bottom of the ball, the gas check safety valve 14 is provided with a pressure relief pipe and an external part, one side of the pressure relief pipe, which is provided with a cap, is provided with an exhaust hole 11-4 which is sealed by using a glass bead 11-5, when the air pressure of the lower part is higher than the pressure of the bottom of the raw liquid container body 11, the glass bead 11-5 is lifted to lift gas from the pressure relief pipe to flow into the raw liquid container body 11, and finally, the gas is exhausted by an air inlet and outlet valve 6.

As shown in figure 7, the upper end opening of the raw liquid container body 11 is provided with a latch 11-2, and the latch 11-2 and the contraction part at the bottom of the upper cover container body 1-11 are screwed up by a bayonet 1-8; at this time, the spring needle tube 7 of the original liquid container body 11 contacts with the spring thimble 7 of the upper cover container body 1-11.

The pogo pin 7 in this embodiment is a commercially available component. The spring thimble 7 is a structure capable of being inserted and pulled out. One part of the spring thimble 7 is mounted with the raw liquid container upper cover 1, and the other part of the spring thimble 7 is mounted with the raw liquid container 11.

As shown in FIG. 7, in the container body 11 of the raw liquid in this embodiment, a wire protecting cover 12 is provided under the spring needle tube 7, and the wire inside the wire protecting cover 12 is connected to the spring needle tube 7 and 3 ultrasonic spray vibrating pieces 16 attached to the bottom opening.

A flange 11-3 which is 1cm longer than the connecting part of the upper cylinder and the lower sphere of the raw liquid container body 11 is connected with a reaction tank 17 through the flange 11-3; the outer side of the raw liquid container body 11 is printed with scale lines 11-10 for measurement.

As shown in FIG. 1, the motor agitation module includes a motor 5 and an agitation paddle 13, the motor 5 is mounted on the bottom plate of the upper lid container body 1-11, the motor 5 is fixed on the bottom plate of the upper lid container body 1-11 by screws, and the screws pass through circular holes on the motor housing and are screwed to the bottom plate of the upper lid container body 1-11.

As shown in fig. 1, a motor shaft of the motor 5 penetrates through the bottom plate of the container body and extends out, and a sealing ring is arranged between the motor shaft of the motor 5 and the bottom plate of the upper cover container body for sealing. Stirring rake 13 passes through the motor shaft of 8 dress at motor 5, and stirring rake 13 stretches into in the stoste container body 11, stirs the granular material and the base fluid that hold in the stoste container body 11, and 5 electric connection control circuit boards 2 of motor.

In this embodiment, the lead interface of the motor 5 is connected to the control circuit board according to the circuit diagram of fig. 2, and the rotation speed of the motor 5 is controlled by user setting through the ATmega32 chip on the control circuit board, and is stopped for timing or abnormal protection. The motor 5 in this embodiment is preferably a speed-regulated permanent magnet dc motor.

As shown in fig. 1 and 7, the ultrasonic spray module includes an ultrasonic spray drive plate 3, a spring thimble 7 and a plurality of ultrasonic spray vibration plates 16, the ultrasonic spray drive plate 3 is electrically connected to the control circuit board 2, the ultrasonic spray drive plate 3 is disposed on the upper plate, the spring thimble 7 is of a plug-in structure, a lead of the ultrasonic spray drive plate 3 is connected to a part of the spring thimble 7, and a part of the spring thimble 7 is disposed in the upper cover container body; the ultrasonic spraying vibrating reeds 16 are arranged on through holes formed in the wall of the container at the lower part of the stock solution container, a vibrating wire 15 of each ultrasonic spraying vibrating reed 16 penetrates into a wire protecting sleeve 12 arranged on the stock solution container body 11 and is welded with the other part of the spring thimble 7, the wire protecting sleeve 12 is arranged on the outer side wall of the stock solution container body 11, and the other part of the spring thimble 7 is arranged on the outer side wall of the stock solution container body 11 and is positioned at the opening end of the stock solution container body 11.

The ultrasonic spraying module of this embodiment, the PWM square wave of ultrasonic spraying drive plate 3 output uses the ultrasonic frequency of PWM ripples drive ultrasonic spraying drive plate, and the user can set up ultrasonic frequency according to the material type in advance when beginning the experiment, guarantees the dispersion effect. The oscillation frequency of the external crystal is 4MHz, so that most experimental requirements are met, and the start-stop time of ultrasonic spraying time can be controlled. The method specifically comprises the following steps: as shown in figures 7 and 8, the lead and the lead protective sleeve 12 on the outer side of the cup wall of the raw liquid container body 11 can prevent the damage of a circuit in the washing process, the lead is connected to a terminal 11-11 of an ultrasonic spray vibrating plate, the shape of the piezoelectric ceramic 11-13 starts to periodically change in a telescopic way under the drive of voltage, a metal substrate 11-12 at the bottom is driven to vibrate, solid liquid in the microporous region 11-14 of the ultrasonic spray vibrating plate metal substrate is vibrated to be crushed and sprayed into a reaction tank 17, and the atomized liquid drop reaction tank is mixed with other components to form an aerosol system.

As shown in fig. 1, the temperature control module includes a single-axis heating rod 10 and a temperature probe 9, the single-axis heating rod 10 is suspended at the bottom of the raw liquid container upper cover 1 and electrically connected to the control circuit board 2, the single-axis heating rod 10 extends into the raw liquid container body 11, the temperature probe 9 is suspended at the bottom of the raw liquid container upper cover 1 and electrically connected to the control circuit board 2, and the temperature probe 9 extends into the raw liquid container body 11.

The temperature control module of this embodiment, unipolar heating rod 10 preferentially adopt 220V interchange unipolar heating rod, connect the relay through control circuit board 2 and carry out opening and shutting of circuit, and temperature probe 9 preferentially adopts 18B20 temperature sensor to be connected with control circuit board 2, and the temperature passes through 1603 LCD and shows. When presetting the temperature and being less than the detection temperature, control circuit board 2 sends high potential signal, switches on the relay switch, and unipolar heating rod 10 begins work, and on the contrary the relay switch disconnection, unipolar heating rod 10 stop work, because unipolar heating rod 10 power is too high, insurance on the voltage converter wiring can automatic fusing protection user safety when transshipping.

The screening and collecting module comprises a screening and collecting tank 21 and magnetic blocks 22, the magnetic blocks 22 are arranged in the screening and collecting tank 21, and the screening and collecting tank 21 is communicated with the reaction tank 17 through a pipeline; the wall of the screening and collecting tank 21 is provided with a magnetic material collecting port 23 and a residue collecting port 24.

As shown in fig. 1, the reaction chamber 17 is a cylinder made of glass, and the preferred dimensions of the reaction chamber 17 in this embodiment are: the height is 17cm, the outer diameter is 12.1cm, the outer side of the cup mouth is provided with a 1cm thread structure, and a flange 11-3 which is connected with the connecting part of the column body of the original liquid container body 11 and the ball body by extending 1cm is additionally arranged. The side wall of the reaction tank 17 is provided with a dispersant atomization injection port 18, a functional modification material atomization injection port 19 and a pneumatic stirring port 20.

As shown in fig. 1, the magnetic field screening pool 21 is made of a glass cuboid material with a thickness of 0.3cm, and the preferred dimensions of the magnetic field screening pool 21 in this embodiment are as follows: 10cm × 10cm × 5 cm. A magnet 22 with the specification of 10cm multiplied by 1cm is attached to a cover plate above the screening and collecting tank 21. The magnetic field screening tank 21 is communicated with the reaction tank 17 by a conduit, and the magnetic field screening tank 21 is provided with a magnetic material collecting port 23 and a residue collecting port 24.

The reaction tank 17 is an aerosol mixed reaction place where various reagent medicines form particles through an ultrasonic spray vibration sheet and is communicated with the magnetic field screening tank 21, the aerosol is in full contact reaction through a pneumatic stirring material, when the reaction time is up, the aerosol enters the magnetic field screening tank 21, the magnetic field in the magnetic field screening tank 21 enables magnetic components to keep suspended and collected from the magnetic material collecting port 23 at the upper end, and nonmagnetic components sink and are recovered from the residual material collecting port 24.

As shown in fig. 9, the pneumatic stirring module includes an argon gas tank 25, a check valve 26, a piston pump 27, a gas tank 28, a throttle check valve 29, and a pneumatic stirring joint 30, the pneumatic stirring joint 30 is mounted on the pneumatic stirring port 20 of the reaction tank 17, the argon gas tank 25, the piston pump 27, the gas tank 28, and the pneumatic stirring joint 30 are connected by gas pipes, the check valve 26 is mounted on the gas pipe between the argon gas tank 25 and the piston pump 27, the throttle check valve 29 is mounted on the gas pipe between the gas tank 28 and the pneumatic stirring joint 30, and the piston pump 27 is electrically connected to the control circuit board 2.

As shown in fig. 5, the DIN6 pin female output terminal 1-5 is used as the circuit output of the piston pump 27, the ultrasonic spray vibrating piece on the dispersant atomizing inlet 18, and the ultrasonic spray vibrating piece on the functional finishing material atomizing inlet 19 in the circuit board 2, and the wire parts of the DIN6 pin male terminal are respectively and electrically connected with the piston pump 27, the ultrasonic spray vibrating piece on the dispersant atomizing inlet 18, and the ultrasonic spray vibrating piece on the functional finishing material atomizing inlet 19.

And the pneumatic stirring module starts a pneumatic stirring mode when the throttling check valve is opened, and performs a one-way inflation mode when the throttling check valve is closed.

The waste gas discharge module is composed of a gas check safety valve 14 arranged at the bottom of the original liquid container body 11 and an exhaust valve 6 arranged on the upper cover 1 of the original liquid container, and waste discharge is communicated with the outside through the gas check safety valve 14 and the exhaust valve 6 when the gas is inflated in a one-way mode and heated to expand.

Example 1-preparation of ethanol-based magnetofluid:

raw materials: 50-20nmFe ₃ O ₄ Particles, absolute ethyl alcohol, oleic acid and deionized water;

the experimental steps are as follows:

taking 5.00gFe ₃ O ₄ Washing the particles in a beaker by using 25ml of absolute ethyl alcohol, adsorbing the particles at the bottom of the beaker by using a magnet, pouring the absolute ethyl alcohol, adding 20ml of absolute ethyl alcohol again, mixing, pouring the mixture into a stock solution container body 11, covering an upper cover 1 of the stock solution container and sealing, checking whether a screw buckle of a reaction tank 17 is screwed tightly and sealed, connecting an exhaust pipe into an exhaust valve 6 because the exhaust gas contains dust, fixing an outlet of the exhaust valve 6 in an outdoor or running ventilation kitchen, and closing a valve 21 of a magnetic field sieving tank and a pneumatic stirring valve; connecting the oleic acid dispersant into a dispersant injection port 18 by using a peristaltic pump (if the dispersant is solid and is dissolved in advance), closing a functional modification material atomization injection port 19, plugging a power plug, opening a power switch, and enabling the equipment to enter a setting interface to setThe temperature is 65 ℃, the pre-stirring time is 20min, the stirring speed is 1000r/min, the stirring speed is not lower than 500r/min according to the setting of entering the ultrasonic spraying stirring, and in order to prevent the ultrasonic spraying vibrating piece from being blocked, the user inputs the ultrasonic frequency of 1kHz, the ultrasonic temperature of 50 ℃, the stirring speed of 1000r/min and the time of 1 h. The equipment automatically operates according to parameters, after the pre-stirring time is 20min, oleic acid in a peristaltic pump is pumped into a dispersing agent injection port 18 at the speed of 5ml/min and is sprayed into a reaction tank by an ultrasonic spray vibrating sheet, the sprayed nano particles and oleic acid nano liquid drops form aerosol in the reaction tank, a pneumatic stirring valve is opened, an air pump is started to repeatedly pump and blow air to fully mix different components, so that the oleic acid liquid drops are uniformly attached to Fe ₃ O ₄ And (3) opening a valve of the magnetic field screening pool 21 after 2min on the particle surface, enabling the aerosol to continuously enter the magnetic field screening pool 21, enabling the magnetic particles in the aerosol to continuously keep a suspension state under a magnetic field, collecting and depositing the magnetic particles from the upper part of the magnetic material collecting port 23 to form ethanol-based magnetic fluid, and enabling the redundant material to be deposited under the action of gravity and be recovered from the residual material collecting port 24. After 30min, when the raw material in the raw material liquid pool is used up, the current of the ultrasonic spraying sheet and the outer metal shell of the temperature sensor is cut off, the equipment enters a self-protection state, and stops running, so that the ultrasonic spraying vibration sheet is prevented from being burnt out due to heating. And after the experiment is finished, the power supply is cut off, the reaction tank is unscrewed to collect the dispersion liquid, and the equipment is cleaned and aired. Through the utility model discloses optimized process condition, ethanol base magnetofluid particle distribution is even, and difficult reunion has possessed better stability.

EXAMPLE 2 preparation of Fe ₃ O ₄ CNT fluid:

experiment raw materials: 20-50nmFe ₃ O ₄ Particles, multi-walled carbon nanotubes with the diameter of 10-30 nm and the length of 1-2 mu m, concentrated nitric acid, concentrated sulfuric acid, deionized water, ammonia water and oleic acid;

the experimental steps are as follows:

grinding multi-wall carbon nano-tube, adding 100ml mixed acid of concentrated sulfuric acid and concentrated nitric acid (volume ratio is 3:1), ultrasonically washing at 50 ℃ for 60min, then diluting and washing with pure water to neutrality, and drying.

Mixing 5gFe ₃ O ₄ The particles are mixed with water and added into a raw liquid container body 11 of the device, 2ml of oleic acid is taken out through peristalsisThe pump is connected into a dispersing agent injection port 18, ammonia water and the multi-wall carbon nano tube are mixed and connected into a functional modification material atomization injection port 19 through a peristaltic pump, and an exhaust interface 6 of an exhaust valve 6 is connected to the outside.

Set for starting with reference to example 1 the utility model discloses the device, start the ultrasonic spray process after waiting to stir 15min in advance, oleic acid spouts into the reaction tank with 0.1 ml/min's speed, and aqueous ammonia and multi-walled carbon nanotube mixture spout into the reaction tank with 0.05 ml/min's speed, open the argon gas pump simultaneously and stir through going. In the process, ammonia and oleic acid meet to form an active agent to link Fe3O4 particles with the multi-walled carbon nanotubes and have hydrophilicity. After the reaction lasts for 5min, the finished product and the residual materials are separated and collected. Finally, the device is closed and cleaned. The utility model discloses the Fe3O4@ CNT fluid of preparation can keep the size of compound even, fluidic advantage that stability is lasting when giving fluid carbon nanotube high thermal conductivity ability.

The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.

As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. The device for preparing the magnetic nanofluid by ultrasonic spraying is characterized by comprising a stock solution container, a motor stirring module, an ultrasonic spraying module, a circuit control module, a temperature control module, a reaction tank (17), a screening and collecting module, a pneumatic stirring module and a waste gas discharging module;

the reaction tank (17) is arranged on the ground, the stock solution container is clamped at the upper part of the reaction tank (17), the lower part of the stock solution container extends into the reaction tank (17), the stock solution container is divided into an upper part and a lower part which are mutually embedded and respectively provided with a stock solution container upper cover (1) and a stock solution container body (11), the motor stirring module is arranged on the stock solution container upper cover (1), and the motor stirring module part extends into the stock solution container body (11);

the ultrasonic spraying module is partially arranged on the upper cover (1) of the stock solution container, the other part is arranged on the stock solution container body (11),

the temperature control module is arranged on the upper cover (1) of the stock solution container, and part of the temperature control module extends into the stock solution container body (11);

a dispersant atomization injection port (18), a pneumatic stirring port (20) and a functional modification material atomization injection port (19) are formed in the side wall of the reaction tank (17);

the screening and collecting module is arranged on the ground and is communicated with the reaction tank (17) through a pipeline;

the pneumatic stirring module is connected with a pneumatic stirring port (20) of the reaction tank (17) through a pipeline;

the waste gas discharging module consists of a gas non-return safety valve (14) arranged at the bottom of the original liquid container body (11) and an exhaust valve (6) arranged on the upper cover (1) of the original liquid container;

the circuit control module is arranged on the upper cover (1) of the stock solution container and is electrically connected with the motor stirring module, the ultrasonic spraying module, the temperature control module and the pneumatic stirring module.

2. The apparatus for preparing magnetic nanofluid according to claim 1, wherein the upper lid (1) of the raw liquid container is an upper lid container body with an upper end open and a lower end sealed, and an upper plate for sealing is provided at the upper end open of the upper lid container body.

3. The apparatus for preparing magnetic nano fluid by ultrasonic spray according to claim 2, wherein the circuit control module comprises a control circuit board (2) and a power switch (4), the control circuit board (2) is mounted on the upper plate of the upper cover (1) of the stock solution container, and the power switch (4) is mounted on the outer wall surface of the container body of the upper cover.

4. The apparatus for preparing magnetic nano fluid by ultrasonic spray according to claim 3, wherein the motor stirring module comprises a motor (5) and a stirring paddle (13), the motor (5) is mounted on the bottom plate of the upper cover container body, the motor shaft of the motor (5) penetrates through the bottom plate of the container body and extends out, the stirring paddle (13) is mounted on the motor shaft of the motor (5) through a coupling (8), the stirring paddle (13) extends into the raw liquid container body (11) to stir the granular materials and the base liquid contained in the raw liquid container body (11), and the motor (5) is electrically connected with the control circuit board (2).

5. The apparatus for preparing magnetic nanofluid by ultrasonic spraying according to claim 3, wherein the ultrasonic spraying module comprises an ultrasonic spraying driving board (3), a spring thimble (7) and a plurality of ultrasonic spraying vibration plates (16), the ultrasonic spraying driving board (3) is electrically connected with the control circuit board (2), the ultrasonic spraying driving board (3) is arranged on the upper board, the spring thimble (7) is of a plug-in structure, the wire of the ultrasonic spraying driving board (3) is connected with a part of the spring thimble (7), and a part of the spring thimble (7) is arranged on the upper cover container body; the ultrasonic spraying vibrating reeds (16) are arranged on a through hole formed in the wall of the container at the lower part of the original liquid container, a vibration lead (15) of each ultrasonic spraying vibrating reed (16) penetrates into a lead protecting sleeve (12) arranged on the original liquid container body (11) and is welded with the other part of the spring thimble (7), the lead protecting sleeve (12) is arranged on the outer side wall of the original liquid container body (11), and the other part of the spring thimble (7) is arranged on the outer side wall of the original liquid container body (11) and is positioned at the opening end of the original liquid container body (11).

6. The apparatus for preparing magnetic nanofluid by ultrasonic spraying according to claim 3, wherein the temperature control module comprises a uniaxial heating rod (10) and a temperature probe (9), the uniaxial heating rod (10) is suspended at the bottom of the crude liquid container upper cover (1) and electrically connected to the control circuit board (2), the uniaxial heating rod (10) extends into the crude liquid container body (11), the temperature probe (9) is suspended at the bottom of the crude liquid container upper cover (1) and electrically connected to the control circuit board (2), and the temperature probe (9) extends into the crude liquid container body (11).

7. The device for preparing the magnetic nanofluid through ultrasonic spraying according to claim 3, wherein the screening and collecting module comprises a screening and collecting tank (21) and a magnetic block (22), the magnetic block (22) is arranged in the screening and collecting tank (21), and the screening and collecting tank (21) is communicated with the reaction tank (17) through a pipeline; the wall of the screening and collecting tank (21) is provided with a magnetic material collecting port (23) and a residue collecting port (24).

8. The apparatus for preparing magnetic nanofluid by ultrasonic spraying according to claim 3, wherein the pneumatic stirring module comprises an argon tank (25), a check valve (26), a piston pump (27), a gas tank (28), a throttling check valve (29) and a pneumatic stirring joint (30), the pneumatic stirring joint (30) is installed on the pneumatic stirring port (20) of the reaction tank (17), the argon tank (25), the piston pump (27), the gas pipe connection between the gas tank (28) and the pneumatic stirring joint (30), the check valve (26) is installed on the gas pipe between the argon tank (25) and the piston pump (27), the throttling check valve (29) is installed on the gas pipe between the gas tank (28) and the pneumatic stirring joint (30), and the piston pump (27) is electrically connected with the control circuit board (2).

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