CN214289013U - Double-circuit powder feeding ultrasonic quick cold spraying device - Google Patents
Double-circuit powder feeding ultrasonic quick cold spraying device Download PDFInfo
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- CN214289013U CN214289013U CN202022223006.9U CN202022223006U CN214289013U CN 214289013 U CN214289013 U CN 214289013U CN 202022223006 U CN202022223006 U CN 202022223006U CN 214289013 U CN214289013 U CN 214289013U
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- 239000000843 powder Substances 0.000 title claims abstract description 132
- 238000010288 cold spraying Methods 0.000 title claims abstract description 28
- 239000007921 spray Substances 0.000 claims abstract description 48
- 238000005507 spraying Methods 0.000 claims description 18
- 239000000428 dust Substances 0.000 claims description 16
- 238000009792 diffusion process Methods 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 5
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- 238000000576 coating method Methods 0.000 abstract description 19
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Abstract
The utility model relates to a double-path powder feeding ultrasonic quick cold spraying device, which comprises a compressor, an air storage tank, a gas heater and a spray gun, wherein the cold spraying device also comprises a first powder feeder and a second powder feeder; the front end of the spray gun is provided with a first powder inlet, a second powder inlet and an air inlet, and the axis of the air inlet is parallel to the axis of the spray gun; and one end of the gas heater, one end of the first powder feeder and one end of the second powder feeder are respectively connected with the gas storage tank, and the other end of the gas heater, one end of the first powder feeder and one end of the second powder feeder are respectively connected with the first powder inlet, the second powder inlet and the gas inlet. The utility model discloses realize cold spraying combined material, and effectively avoid the powder layering, guarantee powder evenly distributed in the coating to show improvement coating quality.
Description
Technical Field
The utility model belongs to the technical field of cold spraying, concretely relates to powder ultrasonic quick cold spraying device is sent to double-circuit.
Background
Cold spraying is a surface spraying process in which the metal particles are not melted throughout the process. Namely, the process of accelerating metal particles to critical speed (supersonic speed) by using compressed air or other gases at lower temperature (< 1000 ℃) so as to enable the metal particles to impact a substrate at high speed (300-1200m/s) in a complete solid state, and realizing material deposition by violent deformation at the interface of the particles and the substrate. The lower gas temperature avoids thermal effects of the powder such as oxidation, phase changes, grain growth, etc. in conventional thermal spray processes. At the same time, the higher particle velocity contributes to sufficient plastic deformation of the particles during deposition to obtain a tissue-dense deposit. These characteristics generally provide cold spray coatings with excellent properties of high electrical conductivity, high thermal conductivity, high corrosion resistance, high wear resistance, and the like. In addition, the low deposition temperature makes the cold spraying an effective method for preparing heat-sensitive materials such as nanocrystalline metal materials, nano composite materials, metal glass and the like, and oxidation-sensitive materials such as T i, Cu and alloys thereof and the like, and can avoid defects caused by other processes.
When the composite material is sprayed in a cold mode, multiple materials need to be mixed in advance and then conveyed to a spray gun for spraying. In the powder feeding process, powder is easy to delaminate, so that the powder in the coating is unevenly distributed, and the coating quality is seriously affected.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem who exists among the prior art, provide a double-circuit send whitewashed supersonic speed cold spraying device, effectively solve current cold spraying device and at the powder in-process of sending, the powder is layering easily to cause the powder to distribute inhomogeneously in the coating, seriously influence the problem of coating quality.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a double-path powder feeding ultrasonic rapid cold spraying device comprises a compressor, a gas storage tank, a gas heater and a spray gun, and further comprises a first powder feeder and a second powder feeder; the front end of the spray gun is provided with a first powder inlet, a second powder inlet and an air inlet, and the axis of the air inlet is parallel to the axis of the spray gun; and one end of the gas heater, one end of the first powder feeder and one end of the second powder feeder are respectively connected with the gas storage tank, and the other end of the gas heater, one end of the first powder feeder and one end of the second powder feeder are respectively connected with the first powder inlet, the second powder inlet and the gas inlet.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the axes of the first powder inlet and the second powder inlet are parallel to the axis of the spray gun.
Furthermore, the axes of the first powder inlet and the second powder inlet are vertical to the axis of the spray gun.
Furthermore, a plurality of flanges distributed in a circumferential array are obliquely arranged on the circumferential direction of the inner wall of the front end of the spray gun and used for generating vortex wind.
Furthermore, the included angle between the axis of the spray gun and the flange is 10-30 degrees.
Further, the spray gun comprises a mixing chamber, a throat pipe and a diffusion chamber which are sequentially communicated along the flow direction; the cross-sectional area of the throat is smaller than the cross-sectional areas of the mixing chamber and the diffusion chamber.
Furthermore, the axes of the air inlet, the throat pipe and the diffusion chamber are positioned on the same straight line.
Further, a spraying chamber for preventing dust from being diffused is arranged outside the spray gun.
Further, the spraying chamber is connected with a dust collector for collecting dust in the spraying chamber.
Furthermore, flow regulating valves are arranged on the first powder feeder and the second powder feeder.
The utility model has the advantages that: the utility model discloses realize cold spraying combined material, and effectively avoid the powder layering, guarantee powder evenly distributed in the coating to show improvement coating quality.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a spray gun according to an embodiment of the present invention;
FIG. 3 is a schematic view of a spray gun according to another embodiment of the present invention;
fig. 4 is a schematic view of the installation of the flange and the spray gun of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a compressor, 2, a gas storage tank, 3, a gas heater, 4, a first powder feeder, 5, a second powder feeder, 6, a spray gun, 61, a first powder inlet, 62, a second powder inlet, 63, a gas inlet, 64, a flange, 65, a mixing chamber, 66, a throat pipe, 67, a diffusion chamber, 7, a spraying chamber, 8, a dust collector, 9 and a flow regulating valve.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
It should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are intended to be construed broadly, as if they were connected either fixedly or removably, or as integrally formed structures. To those of ordinary skill in the art, the specific meaning of such terms in this patent may be understood as appropriate.
As shown in fig. 1-4, the utility model relates to a two-way powder feeding ultrasonic rapid cold spraying device, which comprises a compressor 1, a gas storage tank 2, a gas heater 3 and a spray gun 6, wherein the cold spraying device further comprises a first powder feeder 4 and a second powder feeder 5; the front end of the spray gun 6 is provided with a first powder inlet 61, a second powder inlet 62 and an air inlet 63, and the axis of the air inlet 63 is parallel to the axis of the spray gun 6; one end of the gas heater 3, one end of the first powder feeder 4 and one end of the second powder feeder 5 are respectively connected with the gas storage tank 2, and the other end of the gas heater is respectively connected with the first powder inlet 61, the second powder inlet 62 and the gas inlet 63.
The compressor 1 is connected with the gas storage tank 2, and the gas is compressed by the compressor 1 to form compressed gas which is stored in the gas storage tank 2. Because the gas holder 2 has a certain capacity, it can be ensured that the pressure of the compressed gas flowing out of the gas holder 2 is relatively stable. The gas flowing out of the gas container 2 is divided into three paths and is supplied to the gas heater 3, the first powder feeder 4 and the second powder feeder 5. Wherein the gas supplied to the gas heater 3 is heated in the gas heater 3 to form hot gas, and enters the torch 6 from the gas inlet 63. The gas supplied to the first powder feeder 4 and the second powder feeder 5 mainly functions to drive the flow of the powder in the first powder feeder 4 and the second powder feeder 5, thereby conveying the powder in the first powder feeder 4 and the second powder feeder 5 into the spray gun 6. The hot gas and the two paths of powder are mixed in the spray gun 6 to form supersonic mixed flow, so that the cold spraying composite material is realized, powder layering is effectively avoided, and the uniform distribution of the powder in the coating is ensured, thereby obviously improving the coating quality.
Preferably, a pressure relief valve is installed on the air storage tank 2. When the pressure of the gas in the gas storage tank 2 is greater than the setting pressure of the pressure release valve, the pressure release valve can automatically release the pressure, so that the overlarge pressure is effectively prevented, and the operation safety of the cold spraying device is improved.
Preferably, the outlet end of the gas heater 3 is provided with a temperature sensor for detecting the temperature of the heated gas.
Example 1
As shown in fig. 2, the axes of the first powder inlet 61 and the second powder inlet 62 are parallel to the axis of the spray gun 6. The hot gas and the two paths of powder are mixed in the spray gun 6 to form supersonic mixed flow, so that powder layering is effectively avoided, the powder in the coating is uniformly distributed, and the coating quality is improved.
Example 2
As shown in fig. 1 and 3, the axes of the first powder inlet 61 and the second powder inlet 62 are perpendicular to the axis of the spray gun 6. The hot gas and the two paths of powder are mixed in the spray gun 6 to form supersonic mixed flow, so that powder layering is effectively avoided, the powder in the coating is uniformly distributed, and the coating quality is improved.
As shown in fig. 2 to 4, a plurality of flanges 64 are circumferentially and obliquely arranged on the inner wall of the front end of the lance 6 in a circumferential array for generating vortex wind. The flange 64 is preferably of a rectangular structure or a trapezoidal structure, so that the wind direction is changed when the flange 64 passes through, a vortex is formed at the front end of the spray gun 6, the powder entering from the first powder inlet 61 and the second powder inlet 62 is scattered, the mixing effect between two paths of powder and between hot gas and powder is improved, the powder layering is effectively avoided while the cold spraying of the composite material is realized, the uniform distribution of the powder in the coating is further ensured, and the coating quality is improved.
Preferably, the number of the flanges 64 on the lance 6 is at least five in order to increase the intensity of the swirling wind.
As shown in fig. 4, the inclination angle of the flange 64, i.e., the angle between the axis of the lance 6 and the flange 64 is set to a, and a is an acute angle.
When a is 10 degrees, 20 degrees, 30 degrees or 45 degrees, vortex air can be formed at the front end of the spray gun 6, and the mixing effect between two paths of powder and hot gas realizes the cold spraying of the composite material and effectively avoids powder layering. However, when a is 45 °, the flow speed of the powder and the gas in the axial direction of the spray gun 6 is slow; when a is 10 °, 20 ° or 30 °, the flow speed of the powder and the gas along the axial direction of the spray gun 6 is high. Therefore, considering comprehensively, the included angle a between the axis of the spray gun 6 and the flange 64 is preferably 10 ° to 30 ° to ensure that the front end of the spray gun 6 can form a vortex air, so that the two paths of powder and hot gas are mixed more uniformly and thoroughly, and the flow speed of the powder and gas along the axial direction of the spray gun 6 is increased.
As shown in fig. 2 and 3, the lance 6 includes a mixing chamber 65, a throat 66 and a diffusion chamber 67 which are communicated in sequence in the flow direction; the throat 66 has a cross-sectional area that is less than the cross-sectional areas of the mixing chamber 65 and the diffusion chamber 67. In the mixing chamber 65, the two paths of powder and hot gas are fully mixed to form a gas-powder mixed flow. The mixed gas-powder flow enters the diffusion chamber 67 after passing through the throat 66, thereby reducing the pressure in the mixing chamber 65 and creating a vacuum or negative pressure zone, thereby further increasing the mixing effect and flow rate.
As shown in fig. 2 and 3, the axes of the gas inlet 63, the throat 66 and the diffusion chamber 67 are preferably aligned to reduce the loss of kinetic energy of the powder and the gas and further increase the flow velocity of the powder and the gas.
As shown in fig. 1, a spraying chamber 7 for preventing dust from diffusing is arranged outside the spray gun 6, so that the dust is effectively prevented from polluting the environment and causing adverse effects on the health of operators. The spraying chamber 7 is connected with a dust collector 8 for collecting dust in the spraying chamber 7, so that the dust in the spraying chamber 7 is collected and recycled.
The dust collector 8 includes an induced draft fan and a filter. The induced draft fan sucks the gas in the spraying chamber 7 into the filter for filtering to remove dust in the gas, and the filtered gas is discharged into the atmosphere.
As shown in fig. 1, the first powder feeder 4 and the second powder feeder 5 are both provided with a flow regulating valve 9 for regulating the flow of the powder, so as to further improve the control precision of the ratio of the two paths of powder in the coating, thereby improving the coating quality.
The working process of the cold spraying device is as follows:
1) placing a workpiece to be sprayed in a spraying chamber 7;
2) under the action of gas provided by the gas storage tank 2, powder in the first powder feeder 4 and the second powder feeder 5 respectively enters the spray gun 6 from the first powder inlet 61 and the second powder inlet 62; meanwhile, the gas supplied to the gas heater 3 from the gas storage tank 2 is heated in the gas heater 3 to form hot gas, and the hot gas enters the spray gun 6 from the gas inlet 63;
3) the flange 64 at the front end of the spray gun 6 changes the wind direction when passing through the flange 64, forms a vortex at the front end of the spray gun 6, and fully mixes the two paths of powder and hot gas, so that the two paths of powder and hot gas in the mixing chamber 65 are fully mixed to form a gas-powder mixed flow; the gas-powder mixed flow enters a diffusion chamber 67 after flowing through a throat 66 and forms a supersonic mixed flow;
4) the accelerated powder impacts the substrate at high speed in a completely solid state, and generates larger plastic deformation to deposit on the surface of the substrate to form a coating;
5) during the spraying process, dust in the spraying chamber 7 is collected by the dust collector 8.
The mechanisms, assemblies and components of the present invention that are not described with respect to specific structures are conventional structures that exist in the prior art. Can be purchased directly from the market.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. A double-path powder feeding ultrasonic quick cold spraying device comprises a compressor (1), a gas storage tank (2), a gas heater (3) and a spray gun (6), and is characterized by further comprising a first powder feeder (4) and a second powder feeder (5); the front end of the spray gun (6) is provided with a first powder inlet (61), a second powder inlet (62) and an air inlet (63), and the axis of the air inlet (63) is parallel to the axis of the spray gun (6); one end of the gas heater (3), one end of the first powder feeder (4) and one end of the second powder feeder (5) are respectively connected with the gas storage tank (2), and the other end of the gas heater is respectively connected with the first powder inlet (61), the second powder inlet (62) and the gas inlet (63);
at least five flanges (64) distributed in a circumferential array are circumferentially and obliquely arranged on the inner wall of the front end of the spray gun (6) and used for generating vortex wind, and the included angle between the axis of the spray gun (6) and the flange (64) is 10-30 degrees.
2. The double-way powder feeding ultrasonic rapid cold spraying device according to claim 1, wherein the axes of the first powder inlet (61) and the second powder inlet (62) are parallel to the axis of the spray gun (6).
3. The double-way powder feeding ultrasonic rapid cold spraying device according to claim 1, wherein the axes of the first powder inlet (61) and the second powder inlet (62) are perpendicular to the axis of the spray gun (6).
4. The two-way powder feeding supersonic speed cold spraying device according to claim 1, characterized in that the spray gun (6) comprises a mixing chamber (65), a throat (66) and a diffusion chamber (67) which are communicated in sequence along the flow direction; the cross-sectional area of the throat (66) is smaller than the cross-sectional areas of the mixing chamber (65) and the diffusion chamber (67).
5. The two-way powder feeding ultrasonic rapid cold spraying device according to claim 4, wherein the axes of the air inlet (63), the throat (66) and the diffusion chamber (67) are located on the same straight line.
6. A two-way powder feeding supersonic cold spraying device according to claim 1, characterized in that the outside of the spray gun (6) is provided with a spraying chamber (7) for preventing dust from spreading.
7. A two-way powder feeding ultrasonic rapid cold spraying device according to claim 6, characterized in that the spraying chamber (7) is connected with a dust collector (8) for collecting dust in the spraying chamber (7).
8. The two-way powder feeding ultrasonic rapid cold spraying device according to claim 1, wherein the first powder feeder (4) and the second powder feeder (5) are both provided with a flow regulating valve (9).
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CN202022223006.9U CN214289013U (en) | 2020-10-06 | 2020-10-06 | Double-circuit powder feeding ultrasonic quick cold spraying device |
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CN202022223006.9U CN214289013U (en) | 2020-10-06 | 2020-10-06 | Double-circuit powder feeding ultrasonic quick cold spraying device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114395760A (en) * | 2022-03-24 | 2022-04-26 | 季华实验室 | Cold spray powder feeding system |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN114395760A (en) * | 2022-03-24 | 2022-04-26 | 季华实验室 | Cold spray powder feeding system |
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