CN211303463U - Bubble type atomizing spray gun nozzle - Google Patents
Bubble type atomizing spray gun nozzle Download PDFInfo
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- CN211303463U CN211303463U CN201920958646.9U CN201920958646U CN211303463U CN 211303463 U CN211303463 U CN 211303463U CN 201920958646 U CN201920958646 U CN 201920958646U CN 211303463 U CN211303463 U CN 211303463U
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Abstract
The utility model discloses a bubble type atomizing spray gun nozzle, an use bubble atomization means to carry out atomizing interior formula spray gun for armoured vehicle application operation can reduce the use of coating and reduce the environmental protection pressure. The spray gun nozzle is a two-phase flow nozzle for mixing gas phase and liquid phase in a spray gun, and comprises a gas phase pipe, a coating pipe, two-phase mixing holes, a mixer, a convergence chamber and a nozzle; gas-liquid two phases enter the spray gun from different inlets and are mixed in a mixing type to form gas-liquid two-phase fluid; therefore, the speed of the outlet flow can be greatly reduced, the rebound tendency after the liquid drops contact the workpiece is greatly reduced, and the paint transfer efficiency and the atomization effect are both considered.
Description
Technical Field
The utility model belongs to the technical field of the spray gun, a use bubble atomizing means to carry out atomizing interior formula spray gun that mixes is related to for armoured vehicle application operation.
Background
At present, an external mixing type spray gun is mainly used in the spraying industry, but as the external mixing type spray gun atomizes liquid flow through the friction force between air flow and liquid flow, atomized particles have high speed and tend to rebound directly on the surface of a workpiece, so that the paint transfer efficiency and the atomization effect are incompatible; therefore, a large amount of coating is wasted due to the failure to adhere to the surface of the workpiece, and causes a serious environmental stress. The traditional internal mixing type spray gun only partially transfers the process of friction atomization between gas flow and liquid flow to the inner part of the nozzle, and does not change the essence of the friction atomization. In addition, most of the existing devices for improving the paint delivery efficiency, such as high-flow low-pressure atomization spraying (HVLP), high-pressure airless spraying and electrostatic spraying, have different defects, the high-pressure airless spraying has continuous threat to the personal safety of operators due to high-pressure limitation, and the low-pressure high-flow spraying is only suitable for coating with the viscosity of less than 18s (coating-4 cups). Electrostatic spraying can affect the electromagnetic stealth performance of weaponry.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The paint transmission efficiency and the atomizing effect of overcoming current nozzle can not compatible or to the more shortcoming of place personnel and equipment requirement, the utility model provides a bubble type atomizing spray gun nozzle, an interior mixed type spray gun that utilizes the bubble atomizing principle to atomize promptly, this spray gun not only is applicable to various spraying operating modes, and does not have special requirement to site environment and personnel, especially is adapted to the higher coating of viscosity.
(II) technical scheme
The technical scheme of the utility model is that: a bubble type atomizing spray gun nozzle is characterized by comprising a gas phase pipe, a coating pipe, two-phase mixing holes, a mixer, a convergence chamber and a nozzle; the gas phase pipe is communicated with the compressed air pipeline, and the coating pipe is communicated with the coating pipeline; the mixer and the convergence chamber form an integral space, and the convergence chamber is arranged between the mixer and the nozzle; the cross section area of the convergence chamber close to the mixer is larger than that of the convergence chamber adjacent to the nozzle; the mixer is communicated with the gas phase pipe; the gas phase pipe is communicated with the coating pipe through a hole which is called a two-phase mixing hole; the section of the gas phase pipe is in a fan-shaped ring shape, and the coating pipe is positioned in the hollow part of the gas phase pipe; the pipe wall of the gas phase pipe adjacent to the coating pipe is provided with a plurality of two-phase mixing holes.
Further, the shape of the convergence chamber is conical; the mixer is cylindrical; the maximum diameter of the converging chamber cone is adjacent to the mixer.
Further, the maximum diameter of the converging chamber cone is the same as the mixer diameter.
The principle of the utility model is that:
a two-phase flow nozzle for mixing gas and liquid in a spray gun is designed by adopting a bubble atomization principle. Gas-liquid two phases enter the spray gun from different inlets and are mixed in the mixing chamber to form gas-liquid two-phase flow; namely, high-pressure micro bubbles exist in liquid flow, when gas-liquid two-phase flow is sprayed out of the nozzle, the high-pressure micro bubbles in the coating undergo acceleration, deformation, expansion and blasting processes before and after flowing out of the nozzle due to the action of pressure difference inside and outside the nozzle, and then the liquid flow is broken through shock waves emitted during bubble blasting, so that the breaking and atomization of liquid jet flow are accelerated; the atomization process has no relation with the friction force generated by the velocity difference of gas and liquid flow, so that the velocity of the liquid flow at the outlet can be greatly reduced, the rebound tendency of liquid drops contacting with a workpiece is greatly reduced, and the paint transfer efficiency and the atomization effect are both considered.
(III) advantageous effects
By using the internal mixing type spray gun, the paint transfer efficiency and the atomization effect can be considered at the same time, and the paint utilization rate is improved from 15% to 35%; reducing the air pressure requirement, and controlling the air pressure of all coatings to be 0.25 MPa; the uniformity of a paint film is improved, and the thickness difference of the paint film at the plane position and the dead angle position of a workpiece is kept at 10-15 mu m; the utility model discloses this mixed paint spraying in type not only practices thrift coating, reduces the environmental protection pressure simultaneously.
The coating is used for coating operation of armored vehicles, can reduce the use of coatings and reduce the environmental protection pressure.
Drawings
Fig. 1 is a sectional view of a nozzle of a bubble type atomizing spray gun of the present invention.
In the figure, 1 gas phase tube, 2 coating tube, 3 two-phase mixing hole, 4 mixer, 5 convergence chamber and 6 nozzle
Detailed Description
The present invention will be further described with reference to the cross-sectional view of the nozzle portion.
The utility model relates to a bubble type atomizing spray gun nozzle, namely an internal mixing spray gun which atomizes by using the bubble atomizing principle, comprising a gas phase pipe 1, a coating pipe 2, a two-phase mixing hole 3, a mixer 4, a convergence chamber 5 and a nozzle 6; the gas phase pipe 1 is communicated with a compressed air pipeline, and the coating pipe 2 is communicated with a coating pipeline;
the mixer 4 and the convergence chamber 5 form an integral space, and the convergence chamber 5 is arranged between the mixer 4 and the nozzle; the cross-sectional area of the convergent chamber 5 close to the mixer 4 is greater than that of its vicinity of the nozzle;
the mixer 4 is communicated with the gas phase pipe 1; the gas phase pipe 1 is communicated with the coating material pipe 2 through a hole which is called a two-phase mixing hole 3; the section of the gas phase pipe 1 is in a sector annular shape and has certain radial thickness, the middle part of the gas phase pipe is hollow, and the coating pipe 2 is positioned in the center of the sector annular shape of the gas phase pipe 1. The pipe wall of the gas phase pipe 1 adjacent to the coating pipe 2 is provided with a plurality of two-phase mixing holes.
Further, the converging chamber 5 is conical in shape; the mixer 4 is cylindrical. The converging chamber 5 is adjacent to the mixer 4 at the maximum diameter of the conical shape.
Further, the nozzle is located at the front end of the converging chamber 5; the mixer 4 is located at the rear end of the converging chamber 5;
further, the gas phase pipe 1 and the dope pipe 2 are both located at the rear end of the mixer 4.
Further, the two-phase mixing holes 3 are arranged in parallel to the axial direction of the gas phase pipe 1;
further, the two-phase mixing holes 3 are arranged along a plurality of straight lines parallel to the axial direction of the gas phase pipe 1;
further, the two-phase mixing holes are arranged along a plurality of straight lines on the pipe wall parallel to the axial direction of the gas phase pipe 1, and the straight lines are uniformly distributed along the circumference of the pipe wall.
Further, the fan-ring surface of the front end of the gas phase pipe 1 is spaced from the mixer 4 by a cross for supporting the gas phase pipe 1, and the center of the cross is the end of the coating material pipe 2 for sealing the end of the coating material pipe 2 (spaced from the mixer).
Further, the mixer 4 communicates with the gas phase pipe 1 through a scallop gap.
The utility model discloses a working process is:
compressed air is introduced into a gas phase pipe 1 in a graph 1, coating is introduced into a coating pipe 2, the coating in the coating pipe 2 is sprayed out from a two-phase mixing hole 3 and enters a mixer 4 along with a gas phase to be mixed to form a gas-liquid two-phase flow, high-pressure micro-bubbles exist in the gas-liquid two-phase flow, the gas-liquid two-phase flow flows through a convergence chamber 5 to be further mixed and then is sprayed out from a nozzle 6, after the gas-liquid two-phase flow is sprayed out from a nozzle, the pressure in the micro-bubbles mixed in a liquid flow is higher than the external atmospheric pressure, so that the micro-bubbles start to expand and finally explode, and shock waves and local high temperature generated. The flying speed of the liquid drops in the air is far lower than that of the traditional spray gun, so that the kinetic energy of the liquid drops is far lower than that of the traditional spray gun, the probability of the liquid drops rebounding on the surface of a workpiece is greatly reduced, the coating efficiency is improved, the coating consumption is reduced, and the environmental protection pressure is greatly reduced.
Claims (9)
1. A bubble type atomizing spray gun nozzle is characterized by comprising a gas phase pipe (1), a coating pipe (2), two-phase mixing holes (3), a mixer (4), a convergence chamber (5) and a nozzle (6); the gas phase pipe (1) is communicated with a compressed air pipeline, and the coating pipe (2) is communicated with a coating pipeline;
the mixer (4) and the convergence chamber (5) form an integral space, and the convergence chamber (5) is arranged between the mixer (4) and the nozzle; the cross section area of the convergence chamber (5) close to the mixer (4) is larger than that of the convergence chamber adjacent to the nozzle;
the mixer (4) is communicated with the gas phase pipe (1); the gas phase pipe (1) is communicated with the coating pipe (2) through a hole which is called a two-phase mixing hole (3); the section of the gas phase pipe (1) is in a fan ring shape, and the coating pipe (2) is positioned in the hollow part of the gas phase pipe (1); the pipe wall of the gas phase pipe (1) adjacent to the coating pipe (2) is provided with a plurality of two-phase mixing holes; the two-phase mixing holes are arranged along the tube wall parallel to the axial direction of the gas phase tube (1).
2. A bubble atomizing lance nozzle as claimed in claim 1, characterized in that the convergent chamber (5) is conical in shape; the mixer (4) is cylindrical; the maximum diameter of the cone of the converging chamber (5) is adjacent to the mixer (4).
3. A bubble atomizing lance nozzle as claimed in claim 1, characterized in that the maximum diameter of the conical shape of the converging chamber (5) is the same as the diameter of the mixer (4).
4. A bubble atomizing lance nozzle as set forth in claim 1, characterized in that the nozzle is located at the forward end of the converging chamber (5); the mixer (4) is located at the rear end of the converging chamber (5).
5. A bubble atomizing lance nozzle according to claim 1, characterized in that the two-phase mixing holes are arranged along a plurality of straight lines on the tube wall parallel to the axial direction of the gas phase tube (1).
6. A bubble atomizing lance nozzle as set forth in claim 1, characterized in that the two-phase mixing holes are arranged along a plurality of straight lines on the tube wall parallel to the axial direction of the gas phase tube (1), and each straight line is uniformly distributed along the circumference of the tube wall.
7. A bubble atomizing spray gun nozzle according to claim 1, characterized in that the sector surface of the front end of the gas phase pipe (1) is separated from the mixer (4) by a cross; the center of the cross is the end part of the coating tube (2), and the end part of the coating tube (2) is sealed.
8. A bubble atomizing spray gun nozzle according to claim 1, characterized in that the mixer (4) communicates with the gas phase tube (1) through a scallop.
9. A bubble atomizing spray gun nozzle according to claim 1, characterized in that the gas phase pipe (1) and the dope pipe (2) are located at the rear end of the mixer (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920958646.9U CN211303463U (en) | 2019-06-25 | 2019-06-25 | Bubble type atomizing spray gun nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920958646.9U CN211303463U (en) | 2019-06-25 | 2019-06-25 | Bubble type atomizing spray gun nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN211303463U true CN211303463U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920958646.9U Active CN211303463U (en) | 2019-06-25 | 2019-06-25 | Bubble type atomizing spray gun nozzle |
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| CN (1) | CN211303463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114789097A (en) * | 2022-05-07 | 2022-07-26 | 中铝郑州有色金属研究院有限公司 | Double-medium gas-liquid two-phase flow mixing device |
-
2019
- 2019-06-25 CN CN201920958646.9U patent/CN211303463U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114789097A (en) * | 2022-05-07 | 2022-07-26 | 中铝郑州有色金属研究院有限公司 | Double-medium gas-liquid two-phase flow mixing device |
| CN114789097B (en) * | 2022-05-07 | 2024-05-31 | 中铝郑州有色金属研究院有限公司 | Double-medium gas-liquid two-phase flow mixing device |
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