CN113350929A - High-pressure air-assisted sprayer air duct - Google Patents
High-pressure air-assisted sprayer air duct Download PDFInfo
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- CN113350929A CN113350929A CN202110486031.2A CN202110486031A CN113350929A CN 113350929 A CN113350929 A CN 113350929A CN 202110486031 A CN202110486031 A CN 202110486031A CN 113350929 A CN113350929 A CN 113350929A
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- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 description 12
- 238000000889 atomisation Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/2489—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
- B05B7/2491—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a high-pressure air-assisted sprayer air duct which comprises an axial flow fan and a conical air duct arranged at an air outlet of the axial flow fan, wherein a jet flow inlet is formed in the periphery of the conical air duct, the high-pressure air-assisted sprayer air duct also comprises a supercharging device, the supercharging device comprises a supercharging fan and a supercharging pipeline, the supercharging pipeline is arranged around the conical air duct, one side of the supercharging pipeline is communicated with the jet flow inlet, and the other side of the supercharging pipeline is communicated with the air outlet of the supercharging fan. The invention aims to solve the technical problem that the air duct of the air-assisted sprayer in the prior art cannot effectively improve the range of the sprayer.
Description
Technical Field
The invention belongs to the technical field of spraying devices, and particularly relates to a high-pressure air-assisted sprayer air duct.
Background
The air-assisted sprayer mainly comprises an air duct, a spray ring, a booster pump, a controller, a rack and the like, wherein the spray ring provided with a nozzle is positioned at an air outlet at the front end of the air duct, the atomization process of the sprayer is divided into two processes of primary hydraulic atomization and secondary atomization of high-speed airflow, and the two processes have larger difference in atomization form and mechanism. The primary atomization is a pressure atomization process of liquid flowing out of a nozzle under the action of pressure; the secondary atomization is a phenomenon that liquid drops are dispersed in a space and are crushed and atomized under the extrusion action of high-speed airflow. The fog drop transmission of the air-assisted sprayer mainly goes through the following three processes:
(1) the high-speed airflow near the air outlet breaks the fog drops, so that the particle size of the fog drops is reduced.
(2) Under the action of medium-speed airflow, the collision among the fog drops leads the fog drops to be polymerized and the particle size to be enlarged.
(3) The low-speed airflow diffuses and evaporates the fog drops to reduce the particle size of the fog drops. The speed of the air flow has obvious influence on secondary atomization, and the flow speed and the flow of the air flow have obvious influence on the diffusion and the sedimentation of fog drops in the wind field, so that the range and the dust falling effect of the sprayer are influenced.
In the prior art, an air duct of an air-assisted sprayer generally comprises an axial flow fan and a conical air duct, wherein the axial flow fan and the conical air duct are of a split structure or an integrated structure. The air outlet end of the conical air duct is smaller than the air inlet end. The axial flow fan generates axial airflow, the flow velocity and the air pressure are correspondingly increased after the axial flow fan is guided by the conical air duct, and the airflow sends the tiny fog drops at the front end of the air duct to a certain distance to realize dust control within a certain range. Therefore, the flow rate and the flow rate of the air flow play a decisive role in the range of the spraying machine, and the generation of the air flow depends on the inherent characteristics of the axial flow fan. Generally speaking, compared with a booster fan, an axial flow fan has a small air pressure coefficient and a large flow coefficient, namely, the air pressure of the axial flow fan is small and the flow is large when the axial flow fan and the booster fan have the same power.
In the prior art, the air-assisted sprayer has a large range within 200 meters and a limited range, and the specific reasons are as follows: the larger the range is, the larger the power and volume of the axial flow fan are. Because of the motor of axial fan inside the fan, and be subject to some structural inherent characteristics such as fan blade, the partial sectional area that overflows increases faster along with power increase, causes power increase and fan flow and velocity of flow can not the increase of same proportion, and then can't effectively promote the range of sprayer.
Therefore, the air duct of the air-assisted sprayer in the prior art has the defect that the range of the sprayer cannot be effectively improved, so that the long-range sprayer is a technical difficulty which needs to be solved urgently.
Disclosure of Invention
Technical problem to be solved
Based on the technical scheme, the invention provides a high-pressure air-assisted sprayer air duct, which aims to solve the technical problem that the air duct of an air-assisted sprayer in the prior art cannot effectively improve the range of the sprayer.
(II) technical scheme
In order to solve the technical problem, the invention provides a high-pressure air-assisted sprayer air duct which comprises an axial flow fan and a cone air duct arranged at an air outlet of the axial flow fan, wherein a jet flow inlet is formed in the peripheral part of the cone air duct, the high-pressure air-assisted sprayer air duct further comprises a supercharging device, the supercharging device comprises a supercharging fan and a supercharging pipeline, the supercharging pipeline is arranged around the cone air duct, one side of the supercharging pipeline is communicated with the jet flow inlet, and the other side of the supercharging pipeline is communicated with the air outlet of the supercharging fan.
Preferably, the pressurizing pipeline is provided with a communicating cavity, a pressurizing cavity and a jet cavity which are formed in the pressurizing pipeline and are communicated in sequence, the communicating cavity, the pressurizing cavity and the jet cavity are annular, the communicating cavity is communicated with an air outlet of the pressurizing fan, and the jet cavity is communicated with the jet inlet.
Preferably, the distance between the outer wall of the pressurizing cavity and the inner wall of the pressurizing cavity is set as a pressurizing gap, the pressurizing gap is gradually reduced along the direction of the air flow in the pressurizing pipeline, and the outer wall of the pressurizing cavity is a smooth cambered surface.
Preferably, the distance between the outer wall of the jet cavity and the inner wall of the jet cavity is set as a jet gap, the jet gaps at all positions of the jet cavity are equal along the direction of the air flow in the pressurizing pipeline, and the jet gap is equal to the minimum value of the pressurizing gap.
Preferably, the jet gap is 4-10 mm.
Preferably, the extending direction of the jet flow cavity and the axial included angle of the conical air duct are less than or equal to 5 degrees.
Preferably, the supercharging pipeline is defined by the outer wall of the conical air duct and the pipeline outer cover together.
Preferably, one end of the conical air duct, which is far away from the axial flow fan, is an air duct air outlet, one end of the conical air duct, which is close to the axial flow fan, is an air duct air inlet, and the distance from the jet inlet to the air duct air outlet is smaller than the distance from the jet inlet to the air duct air inlet.
Preferably, the number of the booster fans is 1 or more, and when the number of the booster fans is more than one, the booster fans are uniformly distributed along the circumferential direction of the conical air cylinder.
Preferably, the booster fan is a centrifugal fan, and is mounted on the outer wall of the conical air cylinder through a threaded connecting piece.
(III) advantageous effects
Compared with the prior art, the high-pressure air-assisted sprayer air duct has the beneficial effects that:
compared with the prior art, the high-pressure air-assisted sprayer air duct can provide high-flow-rate and large-flow air flow, can deliver micro fog drops generated by the spray ring at the front end of the air duct to a farther place, realizes long-range spraying, and can effectively improve the spraying range of a sprayer.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
FIG. 1 is a perspective view of the whole structure of the wind barrel of the high-pressure air-assisted sprayer according to the embodiment of the invention;
FIG. 2 is a front view of the whole structure of the wind barrel of the high-pressure air-assisted sprayer according to the embodiment of the invention;
FIG. 3 is a partial structural schematic view of a wind barrel of the high-pressure air-assisted sprayer according to the embodiment of the invention;
fig. 4 is a sectional view of a supercharging device in a wind barrel of the high-pressure air-assisted sprayer according to the embodiment of the invention.
Description of reference numerals:
11. the air conditioner comprises a supercharging device, 12 axial flow fans, 13 conical air cylinders, 14 current collectors, 111 supercharging fans, 112 communicating cavities, 113 supercharging cavities, 114 jet flow cavities, 131 jet flow inlets, 132 air cylinder air outlets, 133 air cylinder air inlets, 000 supercharging pipelines, 001 pipeline outer covers, 01 high-pressure areas and 02 low-pressure areas.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; the two elements may be mechanically or electrically connected, directly or indirectly connected through an intermediate medium, or connected through the inside of the two elements, or "in transmission connection", that is, connected in a power manner through various suitable manners such as belt transmission, gear transmission, or sprocket transmission. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, a high pressure air-assisted sprayer dryer includes an axial flow fan 12 and a cone dryer 3 installed at an air outlet of the axial flow fan 12, wherein a jet inlet 131 is formed at a peripheral portion of the cone dryer 3, the high pressure air-assisted sprayer dryer further includes a pressure boosting device 11, the pressure boosting device 11 includes a pressure boosting fan 111 and a pressure boosting pipeline 000, the pressure boosting pipeline 000 is disposed around the cone dryer 3, one side of the pressure boosting pipeline 000 is communicated with the jet inlet 131, and the other side of the pressure boosting pipeline 000 is communicated with an air outlet of the pressure boosting fan 111.
In the present embodiment, the high-pressure air-assisted sprayer air duct of the present invention is applied to an air-assisted sprayer, and the spray ring is disposed at the air outlet end of the conical air duct 3. The collector 14 is located at the air inlet end of the axial flow fan 12. The jet inlet 131 is an annular notch arranged on the conical air duct. The airflow generated by the booster fan 111 passes through the booster duct 000 to generate a high-speed airflow, which is injected into the cone air duct 31 through the jet inlet 131 and is merged with the airflow generated by the axial flow fan 12 to form a high-flow-rate and high-flow airflow. The high-flow-rate and large-flow airflow can convey the tiny droplets generated by the spray ring at the front end of the air duct to a farther place, so that long-range spraying is realized. In addition, according to the principle of secondary atomization, if the booster fan 111 of the booster device 11 adopts a variable control mode, the air speed and the flow of the air outlet 132 of the air duct can be finely adjusted, so that the range of the air duct of the high-pressure air-assisted sprayer is adjustable, and the spraying effect is controllable.
According to the specific embodiment of the present invention, the pressurization pipeline 000 has a communication cavity 112, a pressurization cavity 113 and a jet cavity 114 formed therein and sequentially communicated, the communication cavity 112, the pressurization cavity 113 and the jet cavity 114 are all annular, the communication cavity 112 is communicated with the air outlet of the pressurization fan 111, and the jet cavity 114 is communicated with the jet inlet 131. In this embodiment, the cavity structure in the boost pipe 000 is designed reasonably, so that the air flow control effect can be further improved. The method specifically comprises the following steps: the communication cavity 112 is large and is favorable for being communicated with the air outlet of the booster fan 111. The pressurizing cavity 113 is used for connecting the communicating cavity 112 and the jet flow cavity 114, the pressurizing cavity 113 is used for pressurizing, and the jet flow cavity 114 is small, so that high-speed airflow is formed.
After the communicating cavity 112 is filled with the airflow generated by the booster fan 111, the airflow is boosted by the booster cavity 113 to generate a high-pressure airflow, and the high-speed airflow is generated by the jet cavity 114, and is injected into the cone air duct 31 and is converged with the airflow generated by the axial flow fan 12 to form a high-flow-rate and high-flow airflow.
According to the specific embodiment of the present invention, the distance between the outer wall of the pressure increasing cavity 113 and the inner wall of the pressure increasing cavity 113 is set as a pressure increasing gap, the pressure increasing gap gradually decreases along the direction of the air flow in the pressure increasing pipeline 000, and the outer wall of the pressure increasing cavity 113 is a smooth arc surface. In this embodiment, the pressurizing cavity 113 is a tapered structure with an arc transition, and before the tapering, it is a low-pressure region 02 connected with the communicating cavity 112, and after the tapering, it is a high-pressure region 01 connected with the jet cavity 114. This structure does benefit to pressurization chamber 113 smooth connection intercommunication chamber 112 and efflux chamber 114, does benefit to the air current smoothly to pass through, and adopts this structure, can effectively guarantee the pressure boost effect of pressurization chamber 113, does benefit to and improves jet pressure.
According to the embodiment of the present invention, the distance between the outer wall of the jet chamber 114 and the inner wall of the jet chamber 114 is set as the jet gap, the jet gaps are all equal at all positions of the jet chamber 114 along the direction of the air flow in the pressurization pipeline 000, and the jet gap is equal to the minimum value of the pressurization gap. In this embodiment, the jet cavity 114 is a smooth straight-through gap, one end of which is connected to the pressure increasing cavity 113, and the other end of which is led into the conical wind barrel 3. By adopting the structure, the gas pressure in the jet flow cavity 114 is favorably stabilized, and the stability of the gas flow pressure in the cone air duct 3 is ensured.
According to a particular embodiment of the invention, the jet gap is 4-10 mm. The structure is beneficial to ensuring enough jet flow speed, and the smaller the jet flow gap is, the larger the jet flow speed is.
According to the specific embodiment of the present invention, the extending direction of the jet flow cavity 114 and the axial direction of the cone air duct 3 form an included angle of less than or equal to 5 °. In this embodiment, the air velocity in the jet flow chamber 114 is set to be the jet flow velocity, and the jet flow velocity is 2 to 5 times of the air velocity in the cone air duct 3. The jet direction of the jet cavity 114 is consistent with the air flow direction in the cone air duct 3 or forms a small included angle, and the included angle is controlled within 5 degrees. By adopting the structure, the air flow generated by the booster fan 111 is favorably ensured to be sprayed to the conical air duct 31, the included angle between the air flow direction and the air flow direction generated by the axial flow fan 12 is smaller, and the improvement of the flow speed and the flow of the total air flow after the two air flows are converged is favorably realized. The range is further improved.
According to the embodiment of the invention, the supercharging pipeline 000 is enclosed by the outer wall of the cone air duct 3 and the pipeline outer cover 001. In the present embodiment, the outer wall of the cone air duct 3 is used as the inner wall of the boost duct 000, and the inner wall and the duct cover 001 enclose the boost duct 000. The structure is favorable for reducing the overall mass of the high-pressure air-assisted sprayer air duct and improving the compactness of the structure.
According to the specific embodiment of the present invention, the end of the cone air duct 3 away from the axial flow fan 12 is an air duct air outlet 132, the end of the cone air duct 3 close to the axial flow fan 12 is an air duct air inlet 133, and the distance from the jet inlet 131 to the air duct air outlet 132 is smaller than the distance from the jet inlet 131 to the air duct air inlet 133. In this embodiment, the jet inlet 131 is disposed at a position close to the air duct air outlet 132, and by adopting this structure, the speed of the air flow close to the air duct air outlet 132 can be increased, which is beneficial to breaking the mist droplets by the high-speed air flow close to the air duct air outlet 132 and reducing the particle size of the mist droplets.
According to the embodiment of the present invention, the number of the booster fans 111 is 1 or more, and when the number of the booster fans 111 is plural, the plurality of booster fans 111 are uniformly distributed along the circumferential direction of the conical air duct 3.
Referring to fig. 1, in the present embodiment, the number of the booster fans 111 is two, and the two booster fans 111 are symmetrically disposed on the left and right sides of the conical air duct 3.
According to the embodiment of the present invention, the booster fan 111 is a centrifugal fan, and the booster fan 111 is mounted on the outer wall of the cone wind barrel 3 through a threaded connection. By adopting the structure, the disassembly, assembly and maintenance of the booster fan 111 are facilitated.
Compared with the prior art, the high-pressure air-assisted sprayer air duct can provide high-flow-rate and large-flow air flow, can deliver micro fog drops generated by the spray ring at the front end of the air duct to a farther place, realizes long-range spraying, and can effectively improve the spraying range of a sprayer. Compared with other spraying machines with the same power, the air duct of the high-pressure air-assisted spraying machine has a longer range due to the fact that the air duct is provided with the supercharging device. Compared with other spraying machines with the same range, the air duct of the high-pressure air-assisted spraying machine has the advantages of more compact structure, small volume and lower energy consumption because the air duct is provided with the supercharging device. In the high-pressure air-assisted sprayer air duct, the supercharging device and the axial flow fan can be respectively and independently controlled, and an intelligent sprayer can be developed under the condition that the structure is not changed, so that the intelligent control is facilitated.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. The high-pressure air-assisted sprayer air duct comprises an axial flow fan and a cone air duct arranged at an air outlet of the axial flow fan, and is characterized in that a jet inlet is formed in the peripheral portion of the cone air duct, the high-pressure air-assisted sprayer air duct further comprises a supercharging device, the supercharging device comprises a supercharging fan and a supercharging pipeline, the supercharging pipeline surrounds the cone air duct, one side of the supercharging pipeline is communicated with the jet inlet, and the other side of the supercharging pipeline is communicated with the air outlet of the supercharging fan.
2. The air duct of the high-pressure air-assisted sprayer according to claim 1, wherein the pressurizing pipeline has a communicating cavity, a pressurizing cavity and a jet cavity which are formed therein and sequentially communicated, the communicating cavity, the pressurizing cavity and the jet cavity are all annular, the communicating cavity is communicated with an air outlet of the pressurizing fan, and the jet cavity is communicated with the jet inlet.
3. The air duct of the high-pressure air-assisted sprayer according to claim 2, wherein the distance between the outer wall of the pressurizing cavity and the inner wall of the pressurizing cavity is set as a pressurizing gap, the pressurizing gap is gradually reduced along the direction of the air flow in the pressurizing pipeline, and the outer wall of the pressurizing cavity is a smooth cambered surface.
4. The air duct of the high-pressure air-assisted sprayer according to claim 3, wherein the distance between the outer wall of the jet cavity and the inner wall of the jet cavity is set as a jet gap, the jet gaps are equal at all positions of the jet cavity along the direction of the air flow in the pressurization pipeline, and the jet gap is equal to the minimum value of the pressurization gap.
5. The air duct of the high-pressure air-assisted sprayer according to claim 4, characterized in that the jet gap is 4-10 mm.
6. The air duct of the high-pressure air-assisted sprayer according to claim 5, wherein an included angle between the extending direction of the jet cavity and the axial direction of the conical air duct is less than or equal to 5 degrees.
7. The air duct of the high-pressure air-assisted sprayer according to any one of claims 1 to 6, characterized in that the pressure boosting pipeline is enclosed by the outer wall of the cone air duct and a pipeline outer cover.
8. The air duct of the high-pressure air-assisted sprayer according to claim 1, wherein one end of the conical air duct, which is far away from the axial flow fan, is an air duct air outlet, one end of the conical air duct, which is close to the axial flow fan, is an air duct air inlet, and the distance from the jet inlet to the air duct air outlet is smaller than the distance from the jet inlet to the air duct air inlet.
9. The air duct of the high-pressure air-assisted sprayer according to claim 1, wherein the number of the booster fans is 1 or more, and when the number of the booster fans is more, the booster fans are uniformly distributed along the circumferential direction of the conical air duct.
10. The air duct of the high-pressure air-assisted sprayer according to claim 1, wherein the booster fan is a centrifugal fan, and the booster fan is mounted on the outer wall of the cone air duct through a threaded connection piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110486031.2A CN113350929A (en) | 2021-04-30 | 2021-04-30 | High-pressure air-assisted sprayer air duct |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110486031.2A CN113350929A (en) | 2021-04-30 | 2021-04-30 | High-pressure air-assisted sprayer air duct |
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| CN113350929A true CN113350929A (en) | 2021-09-07 |
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| CN202110486031.2A Pending CN113350929A (en) | 2021-04-30 | 2021-04-30 | High-pressure air-assisted sprayer air duct |
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2021
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