CN218394196U

CN218394196U - Rotary spraying device

Info

Publication number: CN218394196U
Application number: CN202222221795.1U
Authority: CN
Inventors: 伍晖; 李子威
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2023-01-31
Anticipated expiration: 2032-08-23

Abstract

The application provides a rotatory atomizer, rotatory atomizer includes: the gas supply unit comprises a compressed gas supply device, a pipeline and a gas spraying device, wherein the compressed gas supply device is connected to the gas spraying device through the pipeline; the liquid supply unit comprises a rotating shaft, a disc screen and a liquid storage container, the disc screen is connected to the rotating shaft and rotates along with the rotating shaft, the liquid storage container is used for containing liquid, and the liquid storage container is provided with an opening and used for supplying the liquid in the liquid storage container to the disc screen; the air injection device is arranged above the disc screen, and the air injection direction of the air injection device faces the disc screen.

Description

Rotary spraying device

Technical Field

The application relates to the technical field of spraying equipment, and in particular relates to a rotary spraying device.

Background

The spray is artificial fog, and sprays liquid in ultrafine droplets through a fog-making system, and the ultrafine artificial droplets can drift and suspend in the air for a long time to form white fog. The injection and atomization are important bases of mass and heat transfer analysis, and the application fields of the analysis are very wide from gasoline engines, diesel engines, gas turbines, gas fuel engines, airplanes and rocket engines in the fields of power machinery and engineering to boilers, pharmacy, fire fighting, agricultural irrigation and daily life.

The conventional spraying technique is mainly to break up the liquid into very fine liquid drops by heating, pressurizing, centrifuging, ultrasonic vibration and the like. However, the traditional spraying mode is often limited by the poor atomization performance of the spraying device, and the diameter of the generated droplets is large, so that the requirements in some practical production and life are difficult to meet. Therefore, it is necessary to develop a spraying device with high spraying efficiency, stable working performance and fine and uniform droplets.

SUMMERY OF THE UTILITY MODEL

The present application has been made in view of the state of the art described above. The application aims to provide a rotary spraying device which has the advantages of high spraying efficiency, small and uniform fog drops and the like.

Embodiments of the present application provide a rotary atomizer device comprising:

the gas supply unit comprises a compressed gas supply device, a pipeline and a gas spraying device, wherein the compressed gas supply device is connected to the gas spraying device through the pipeline;

the liquid supply unit comprises a rotating shaft, a disc screen and a liquid storage container, the disc screen is connected to the rotating shaft and rotates along with the rotating shaft, the liquid storage container is used for containing liquid, and the liquid storage container is provided with an opening and used for supplying the liquid in the liquid storage container to the disc screen;

the air injection device is arranged above the disc screen, and the air injection direction of the air injection device faces the disc screen.

In at least one possible embodiment, the liquid supply unit further comprises a pressure reducing valve, which is arranged in the conduit for regulating the pressure and/or flow rate of the gas in the conduit.

In at least one possible embodiment, the air injection direction of the air injection device is perpendicular to the disc screen;

the rotating shaft is connected to the center of the disc screen;

the liquid storage container is arranged above the disc screen, the bottom of the liquid storage container is attached to the disc screen,

the opening of the reservoir comprising one or more slits or a plurality of holes for uniformly supplying the liquid in the reservoir to the disc screen,

the air injection device is positioned at the downstream side of the liquid storage container in the rotation direction of the disc screen.

In at least one possible embodiment, the liquid is a solution or molten metal, the target product is powder particles of the respective material,

the rotary atomizer apparatus further comprising:

drying or cooling means for drying or cooling the atomized droplets to obtain the corresponding powder particles; and

a collecting device for collecting the powder particles;

the drying device or the cooling device is located downstream of the gas injection direction of the gas injection device,

and a heating part is arranged in or outside the liquid storage container and is used for enabling the material in the liquid storage container to be in a liquid state.

In at least one possible embodiment, the reservoir comprises a syringe pump or an extruder, and the rate at which the liquid in the reservoir is supplied to the disc screen can be controlled.

In at least one of the possible embodiments,

the surface pressure of the air injection device is 0.01-5 MPa;

the rotating speed of the rotating shaft is 1-1000 rpm;

the distance between the disc screen and the air injection device is 2-10 mm;

the mesh number of the disc screen is 50-3000 meshes.

In at least one possible embodiment, the liquid supply unit further comprises a brush head to which a liquid output of the liquid reservoir is connected, the brush head contacting the disc screen for evenly spreading the liquid to the disc screen.

Drawings

Fig. 1 is a schematic structural view of an air supply unit according to an embodiment of the present application.

FIG. 2 is a schematic structural view of a liquid supply unit according to an embodiment of the present application.

Fig. 3 is a schematic structural view of a rotary atomizer according to an embodiment of the present application.

Fig. 4 is a flow chart of a method of using a rotary atomizer device according to one embodiment of the present application.

Fig. 5 is a graph of the size distribution of atomized droplets made according to the first embodiment of the present application.

Fig. 6 is a graph of the size distribution of atomized droplets made according to the second embodiment of the present application.

Description of the reference numerals

100. Air supply unit

11. Compressed gas supply device

12. Pipeline

13. Pressure reducing valve

14. Air injection device

200. Liquid supply unit

21. Rotating shaft

22. Disc screen

23. Liquid storage container

S100 air supply step

S200 spraying step

Detailed Description

Exemplary embodiments of the present application are described below with reference to the drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. It should be understood that the detailed description is only intended to teach one skilled in the art how to practice the present application, and is not intended to be exhaustive or to limit the scope of the application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

A first aspect of an embodiment of the present application provides a rotary atomizer (hereinafter, sometimes simply referred to as "atomizer").

As shown in fig. 1, 2, and 3, the rotary atomizer may include a gas supply unit 100 and a liquid supply unit 200.

As shown in fig. 1, the gas supply unit 100 may include a compressed gas supply device 11, a pipe 12, a pressure reducing valve 13, and a gas injection device 14. The compressed gas supply 11 can be connected to the gas injection device 14 via a line 12, and the line 12 can be provided with a pressure relief valve 13.

Specifically, the compressed gas supply device 11 and the pressure reducing valve 13 are opened, and the compressed gas in the compressed gas supply device 11 passes through the pressure reducing valve 13 via the pipe 12. The pressure and flow rate of the compressed gas are regulated by the pressure reducing valve 13, and then reach the gas jet device 14 through the pipeline 12, and are ejected from the gas jet device 14 in the form of high-speed gas flow. It is understood that the specific types of the compressed gas supply device 11, the pipeline 12, the pressure reducing valve 13 and the gas injection device 14 can be selected by those skilled in the art according to actual needs, as long as the above functions can be achieved.

Preferably, the compressed gas supply device 11 may be a high-pressure gas cylinder or an air compressor; the pipeline 12 may be a plastic pipe or a metal pipe; the gas injection device 14 may be an air knife or an elongated gas outlet pipe.

Further, when the air injection device 14 is an air knife or an elongated air outlet pipe, a person skilled in the art may select the width of the air knife or the elongated air outlet pipe according to actual needs as long as the above functions can be achieved. Illustratively, the width W of the air knife or elongated air outlet conduit may be from 1 to 20cm.

Specifically, according to some embodiments of the present application, the gauge pressure of the gas injection device 14 may be 0.01 to 5MPa, for example, 0.01MPa, 0.05MPa, 0.1MPa, 0.5MPa, 1MPa, 2MPa, or 5MPa, and the like. The type of the compressed gas can be selected by those skilled in the art according to actual needs, as long as the compressed gas is safe and environmentally friendly and does not react with the liquid in the liquid supply unit 200.

As shown in fig. 2, the liquid supply unit 200 may include a rotating shaft 21, a disk screen 22, and a liquid storage container 23.

Specifically, the rotating shaft 21 is fixedly connected with the disc screen 22, so that the disc screen 22 can rotate along with the rotating shaft 21. The shaft 21 and the disk screen 22 may be connected by a flange. It is to be understood that the connection manner of the rotary shaft 21 and the disk screen 22 is not limited thereto, and for example, the two may be connected by welding, bolting, or the like. The reservoir 23 may be fixed above the disc screen 22 by a reservoir holder or other means (the support means of the reservoir is not shown). The bottom of the reservoir 23 may abut the disk screen 22 or be spaced from the disk screen 22.

Optionally, the bottom of the reservoir 23 may be formed with one or more slits, and the liquid in the reservoir 23 may be applied or dropped through the slits on the bottom onto the disc screen 22.

Optionally, the bottom of the reservoir 23 may be provided with a plurality of holes, and the liquid in the reservoir 23 may be relatively uniformly smeared or dripped onto the disc screen 22 through the plurality of holes on the bottom.

Alternatively, the reservoir 23 may be a syringe pump. It will be appreciated that the type of syringe pump chosen for the reservoir 23 does not exclude large liquid supply devices for industrial applications, such as: an extruder. With this selection of apparatus, the rate at which liquid from the reservoir 23 is supplied to the disc screen 22 can be controlled.

Optionally, the liquid supply unit 200 may further comprise a brush head to which the liquid output end of the liquid reservoir 23 may be connected, the brush head being adapted to evenly spread the liquid raw material onto the disc screen 22.

Preferably, the rotating shaft 21 is located at the center of the disc screen 22.

Further, as shown in fig. 3, the air injection device 14 may be fixedly disposed above the disc screen 22 by a bracket or other means (the fixing device of the air injection device 14 is not shown). The air jet direction of the air jet device 14 is toward the disc screen 22. Preferably, the air injection direction of the air injection device 14 can be perpendicular to the disc screen 22.

Further, the shaft 21 is driven by a motor (not shown), so as to rotate the disc screen 22. After the liquid in the liquid storage container 23 is attached to the disk screen 22, the liquid contained in the liquid storage container 23 is continuously carried to the nozzle of the air injection device 14 along with the rotation motion of the disk screen 22. Under the action of the high-speed air flow sprayed by the air spraying device 14, the liquid adhered to the disc screen 22 is sprayed and atomized.

Preferably, according to some embodiments of the present application, the speed of movement of the disc screen 22 may be in the range of 1-1000 rpm, for example, 10 rpm, 50 rpm, 100 rpm, 500 rpm, 800 rpm, 1000 rpm, or the like. If the rotation speed of the disc screen 22 is too slow, the liquid carried on the disc screen 22 is easy to dry up; if the rotation speed of the disc screen 22 is too high, the liquid carried on the disc screen 22 is too much, and large liquid drops are easily formed in the spraying process, thereby affecting the spraying quality. Therefore, by adopting the rotating speed of the disc screen 22, on one hand, the liquid on the disc screen can be prevented from drying up; on the other hand, the method is beneficial to obtaining high-quality fog drops.

Preferably, according to some embodiments of the present application, the disc screen 22 may be spaced from the nozzle of the air-jet device 14 by 2 to 10mm. For example, it may be 2mm, 4mm, 6mm, 8mm, 10mm, or the like. If the distance between the disc screen 22 and the air jet means 14 is too small, liquid is likely to touch and contaminate the air jet means 14. If the distance between the disc screen 22 and the air jet device 14 is too large, the air flow dissipation is large, and the broken liquid cannot be sufficiently blown to form more uniform atomized liquid droplets. Therefore, the distance between the disc screen 22 and the air injection device 14 is favorable for forming uniform atomized liquid drops, and meanwhile, the air injection device 14 can be prevented from being polluted by liquid.

It will be appreciated that the specific types of shaft 21, disk screen 22, and reservoir 23 may be selected by those skilled in the art according to the actual requirements.

Preferably, the material of the disc screen 22 may include at least one of polyester, nylon, copper, and stainless steel. The material of the liquid storage container 23 may include at least one of metal, ceramic, glass, and plastic, and it is understood that the material of the liquid storage container 23 is mainly determined by the kind of the liquid contained therein, for example, the material of the liquid storage container 23 is required not to be corroded by the liquid contained therein.

Preferably, the mesh number of the disc screen 22 may be 50 to 3000 mesh, for example, 50, 100, 200, 500, 1000, 2000, 3000 mesh, or the like. Within the mesh range of the disc screen 22 provided by the application, the rotary spraying device has high spraying efficiency, and the prepared droplets have small granularity and good uniformity. If the mesh number of the disc screen 22 is too small, the spraying efficiency is low; if the mesh number of the disk screen 22 is too large, the air resistance of the disk screen 22 increases, and the spray quality is affected.

Specifically, the type of liquid in the liquid storage container 23 is not limited, and can be selected by those skilled in the art according to actual needs. For example, the liquid may include a pure solvent, solution, molten metal, and the like. The pure solvent and the solvent in the solution may include at least one of pure water, ethanol, N-propanol, isopropanol, N-butanol, t-butanol, hexafluoroisopropanol, N-methylpyrrolidone, N-dimethylformamide, N-dimethylacetamide, dimethylsulfoxide, acetone, liquid alkane, and liquid alkene. The solute in the solution may include various types of organic and inorganic substances that are soluble in the above-mentioned solution. The molten metal may include at least one of gold, silver, copper, aluminum, lead, tin, zinc.

Further, when the liquid is a solution or a molten metal, and the target product is a powder particle of the corresponding raw material. The spraying device may be added with a drying device or a cooling device and a collecting device (not shown in the figure). A drying device or a cooling device and a collecting device may be provided below the disk screen 22 (downstream of the air-jet direction of the air-jet device 14) to dry or cool the mist droplets, and the powder particles corresponding to the raw material may be collected in the collecting device. The specific type of the collecting device can be selected by the person skilled in the art according to the actual need. It will be appreciated that where the raw material is molten metal, the reservoir 23 may have the function of heating the metal to the molten state.

In a second aspect of the embodiments of the present application, there is provided a method of using the rotary atomizing device (hereinafter, sometimes simply referred to as "method of use").

As shown in fig. 4, the use method includes an air supply step S100 and a spraying step S200.

In the air supply step S100: the compressed gas supply device 11 and the pressure reducing valve 13 are opened to allow the gas supply unit 100 to discharge a high-speed gas flow.

Specifically, the compressed gas supply device 11 and the pressure reducing valve 13 are opened, and the gas in the compressed gas supply device 11 reaches the pressure reducing valve 13 via the pipe 12. The gas is adjusted in pressure and flow rate by the pressure reducing valve 13, then reaches the gas injection device 14 through the pipeline 12, and is injected from the gas injection device 14 to the disc screen 22 in the form of high-speed gas flow.

In the spraying step S200: under the driving of the rotating shaft 21, the liquid supply unit 200 delivers the liquid to the nozzle of the air injection device 14, and the liquid is injected and atomized by the high-speed air flow.

Specifically, the rotating shaft 21 is driven by a motor to rotate, so as to drive the disc screen 22 to rotate. The disc screen 22 adheres and carries the liquid in the liquid storage container 23 to the nozzle of the air injection device 14, and the liquid is injected and atomized under the action of the high-speed air flow sprayed by the air injection device 14.

Further, when the liquid is a solution or a molten metal, and the target product is powder particles of a corresponding raw material, a drying device or a cooling device and a collecting device may be provided below the disk screen 22 (downstream of the air-jet direction of the air-jet device 14) for collecting the corresponding powder particles in the collecting device after drying or cooling the mist droplets.

In a third aspect of embodiments of the present application, there is provided an atomized liquid droplet and a powder particle.

The atomized liquid drops and the powder particles are prepared by the rotary spraying device and the using method thereof. The atomized droplets and powder particles are of small and uniform size.

The following description is illustrative of possible specific embodiments of the present application and is not to be construed as limiting the present application. All of the starting materials employed in the following embodiments are either commercially available or may be synthesized according to methods herein or known, and for reaction conditions not listed, are conventional settings or options in the art, and are readily available to those skilled in the art.

First embodiment

This embodiment employs a rotary atomizer device as shown in fig. 3, in which:

(1) The compressed gas supply device 11 (air compressor) and the pressure reducing valve 13 are opened, and the gas in the compressed gas supply device 11 reaches the pressure reducing valve 13 via the pipe 12. The gas is adjusted in pressure and flow rate by a pressure reducing valve 13, then reaches a gas spraying device 14 (an air knife with the width W of 30 mm) through a pipeline 12, and is sprayed out from the gas spraying device 14 to a disc screen 22 (a stainless steel screen with the mesh number of 2000 and the radius of 10 cm) in the form of high-speed gas flow (the spraying pressure is 0.6 MPa), and the distance between a nozzle of the gas spraying device 14 and the disc screen is 2mm.

(2) The rotating shaft 21 is driven by a motor to rotate, and drives a disc screen 22 (a stainless steel screen with 2000 meshes and a radius of 10 cm) to rotate at a speed of 10 revolutions per minute. The disc screen 22 adheres and carries the liquid (deionized water) in the liquid storage container 23 (made of acrylic material) to the nozzle of the air injection device 14, and the deionized water is sprayed and atomized under the action of the high-speed air flow sprayed by the air injection device 14.

The volume distribution of the atomized droplets produced in this embodiment is shown in the table below and in fig. 5.

Particle size (. Mu.m)	Cumulative%
		1.0	0.36
3.0	1.19
		5.0	1.88
10.0	13.72
		30.0	88.11
32.0	91.69
		40.0	98.84
45.0	99.88
		50.0	100.00
80.0	100.00

The atomized droplets produced in this embodiment had a weight average particle size of 19.24 μm.

Second embodiment

This embodiment employs a rotary atomizer device as shown in fig. 3, in which:

(1) The compressed gas supply 11 (high-pressure gas cylinder) and the pressure reducing valve 13 are opened, and the gas of the compressed gas supply 11 reaches the pressure reducing valve 13 via the line 12. The gas is adjusted in pressure and flow rate by the pressure reducing valve 13, then reaches the gas spraying device 14 (a strip-shaped gas outlet pipeline with the width W of 30 mm) through a pipeline, and is sprayed from the gas spraying device 14 to a disc screen 22 (a brass screen with the mesh number of 1000 and the diameter of 15 cm) in a high-speed gas flow (the spraying pressure is 0.5 MPa), and the distance between a nozzle of the gas spraying device 14 and the disc screen 22 is 2mm.

(2) The rotating shaft 21 is driven by a motor to rotate, and drives a disc screen 22 (a brass screen with the mesh number of 1000 and the diameter of 15 cm) to rotate at the speed of 20 revolutions per minute. The disc screen 22 adheres and carries the liquid (absolute ethyl alcohol) in the liquid storage container 23 (made of acrylic material) to the nozzle of the air injection device 14, and the absolute ethyl alcohol is sprayed and atomized under the action of the high-speed air flow sprayed by the air injection device 14.

The volume distribution of the atomized droplets produced by this embodiment is shown in the table below and in fig. 6.

Particle size (. Mu.m)	Cumulative% of
		1.0	0.37
3.0	1.12
		5.0	1.57
10.0	11.30
		30.0	77.11
32.0	80.83
		40.0	90.83
45.0	94.35
		50.0	96.63
80.0	100.00

The atomized droplets produced in this embodiment had a weight average particle size of 22.55 μm.

Third embodiment

This embodiment employs a rotary atomizer device as shown in fig. 3, in which:

(1) The metallic tin block is added into a titanium tin stock solution container 23 with a heating function, and is heated to 300 ℃ to be molten.

(2) The compressed gas supply device 11 (high-pressure gas cylinder) and the pressure reducing valve 13 are opened, and the gas in the compressed gas supply device 11 reaches the pressure reducing valve 13 via the pipe 12. The gas is adjusted in pressure and flow rate by the pressure reducing valve 13, then reaches the gas spraying device 14 (a strip-shaped gas outlet pipeline with the width W of 30 mm) through the pipeline 12, and is sprayed from the gas spraying device 14 to the disc screen 22 (a stainless steel screen with the mesh number of 100 and the diameter of 10 cm) in a high-speed gas flow (the spraying pressure is 1 MPa), and the distance between the nozzle of the gas spraying device 14 and the disc screen is 2mm.

(3) The rotating shaft 21 is driven by a motor to rotate, and drives a disc screen 22 (a stainless steel screen with the mesh number of 100 and the diameter of 10 cm) to rotate at the speed of 30 revolutions per minute. The disc screen 22 adheres and carries the molten metal (tin) in the liquid storage container to the nozzle of the air injection device 14, and the molten metal (tin) is injected and atomized under the action of the high-speed air flow injected by the air injection device.

(4) The atomized molten metal (tin) may be cooled by a cooling device (not shown) and then solidified to form metal (tin) powder particles, which fall into a collecting device.

It will be appreciated that the above described embodiments and some of their aspects or features may be combined as appropriate.

Some advantageous effects of the above-described embodiments of the present application will be briefly described below.

(i) The rotary spraying device is simple in structure, low in manufacturing cost, high in atomization efficiency, good in working stability and not prone to nozzle blockage and the like.

(ii) The rotary spraying device and the using method thereof are easy to implement, have wide application range, and can be applied to the atomization of various raw materials by changing the selection of relevant equipment and devices.

(iii) The atomized liquid drops and the powder particles generated by the rotary spraying device are small in granularity and even, and the requirements of various life and production application scenes can be met.

It should be understood that, in the present application, when the number of the parts or members is not particularly limited, the number thereof may be one or more, and the plurality herein means two or more. Where the number of parts or elements shown in the drawings and/or described in the specification is a specific number, e.g. two, three, four, etc., this specific number is generally exemplary and not limiting, and it can be understood that it is plural, i.e. two or more, but it is not meant to exclude one from the present application.

It should be understood that the above embodiments are merely exemplary, and are not intended to limit the present application. Various modifications and alterations of the above-described embodiments may be made by those skilled in the art in light of the teachings of this application without departing from the scope thereof.

Claims

1. A rotary atomizer device, comprising:

2. The rotary atomizer device of claim 1, wherein said liquid supply unit further comprises a pressure relief valve disposed in said conduit for regulating the pressure and/or flow rate of gas in said conduit.

3. The rotary atomizer device of claim 1,

the air injection direction of the air injection device is vertical to the disc screen;

the rotating shaft is connected to the center of the disc screen;

4. The rotary atomizer device of any one of claims 1 to 3,

the liquid is solution or molten metal, the target product is powder particles of corresponding materials,

the rotary atomizer apparatus further comprising:

a collecting device for collecting the powder particles;

5. A rotary atomizer device according to any one of claims 1 to 3,

the reservoir comprises a syringe pump or an extruder capable of controlling the rate at which the liquid within the reservoir is supplied to the disc screen.

6. The rotary atomizer device of any one of claims 1 to 3,

the surface pressure of the air injection device is 0.01-5 MPa;

the rotating speed of the rotating shaft is 1-1000 rpm;

the distance between the disc screen and the air injection device is 2-10 mm;

the mesh number of the disc screen is 50-3000 meshes.

7. The rotary atomizer device of any one of claims 1 to 3,

the liquid supply unit further comprises a brush head, a liquid output end of the liquid storage container is connected to the brush head, and the brush head is in contact with the disc screen and used for uniformly smearing the liquid to the disc screen.