CN210122586U - Supersonic flame spraying gun with double-path powder feeding structure - Google Patents
Supersonic flame spraying gun with double-path powder feeding structure Download PDFInfo
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- CN210122586U CN210122586U CN201920864562.9U CN201920864562U CN210122586U CN 210122586 U CN210122586 U CN 210122586U CN 201920864562 U CN201920864562 U CN 201920864562U CN 210122586 U CN210122586 U CN 210122586U
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Abstract
A supersonic flame spraying gun with a two-way powder feeding structure comprises a barrel arranged horizontally and a gun seat arranged vertically, wherein the gun seat is positioned behind the barrel; the oxygen inlet and the fuel inlet are communicated with the combustion chamber, and the conical nozzle is arranged above the combustion chamber; a first powder feeding port is arranged at the rear part of the gun seat and is horizontally arranged and communicated with the conical nozzle; a bore is arranged in the center of the gun barrel and is communicated with the conical nozzle, and a second powder feeding port which is vertically arranged and is communicated with the bore is arranged in the middle of the gun barrel; the particle size of the powder conveyed by the first powder feeding port is larger than that of the powder conveyed by the second powder feeding port. According to the utility model discloses a supersonic speed flame spraying rifle makes different particle diameter powders can both reach fully to soften to form mutual adhesion at the spraying in-process, thereby show the deposition efficiency who improves the particle.
Description
Technical Field
The utility model relates to a hot spraying coating equipment, concretely relates to supersonic speed flame spraying rifle.
Background
Supersonic flame spraying (High-velocity oxygen-fuel, HVOF for short). The high-temperature and high-speed combustion flame flow is generated by combusting hydrocarbon fuel gas such as propane, propylene and the like, or liquid fuel such as aviation kerosene, alcohol and the like and high-pressure oxygen in a combustion chamber or a special nozzle, the combustion flame flow speed can reach more than five Mach (1500m/s), and the temperature can reach 3200 ℃. By feeding the powder axially into the flame, the sprayed particles can be heated to a molten or semi-molten state and accelerated to a velocity of up to 300-500m/s or even higher, and impact the surface of the substrate to obtain a dense high quality coating with high bonding strength.
The existing supersonic flame spraying equipment has the problems that: the particle deposition efficiency is low, typically below 40%, due to non-uniform melting of the sprayed particles.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a supersonic speed flame spraying rifle with powder structure is sent to double-circuit can improve powder deposition efficiency.
According to the utility model discloses supersonic speed flame spraying rifle with powder structure is sent to double-circuit, including barrel and the vertical stock of arranging that the level was arranged, the stock is located the barrel rear.
The oxygen inlet and the fuel inlet are communicated with the combustion chamber, and the conical nozzle is arranged above the combustion chamber; a first powder feeding port is arranged at the rear part of the gun seat and is horizontally arranged and communicated with the conical nozzle; the center of the gun barrel is provided with a gun chamber which is communicated with the conical nozzle, and the middle part of the gun barrel is provided with a second powder feeding port which is vertically arranged and communicated with the gun chamber.
The particle size of the powder conveyed by the first powder feeding port is larger than that of the powder conveyed by the second powder feeding port.
Preferably, the length of the gun barrel is 20-30cm, and the second powder feeding port is 10-15cm away from the muzzle of the gun barrel.
Preferably, cooling water passages are provided in the barrel and the butt in communication.
Preferably, the barrel and the gun seat are integrally made of red copper, and the conical nozzle is made of ceramic.
According to the utility model discloses a supersonic speed flame spraying rifle, send the powder mouth through setting up two tunnel, separately carry great particle diameter powder and less particle diameter powder, make different particle diameter powder can both reach abundant softening to form mutual adhesion in the spraying process, thereby can show the deposition efficiency who improves the particle.
Drawings
Fig. 1 is a schematic view of the structure and working principle of the supersonic flame spraying gun according to the utility model.
Detailed Description
The present invention will be further explained with reference to the drawings and examples. It should be understood by those skilled in the art that the following described embodiments are only illustrative of the present invention and are not intended to limit the same in any way.
Referring to fig. 1, the supersonic flame spraying gun according to the present invention mainly comprises a horizontally arranged gun barrel 1 and a vertically arranged gun base 2, wherein the gun base 2 is located behind the gun barrel 1.
Wherein, the lower part of the gun seat 2 is provided with an oxygen inlet 21 and a fuel inlet 22, the middle part of the gun seat 2 is provided with a combustion chamber 23, the oxygen inlet 21 and the fuel inlet 22 are communicated with the combustion chamber 23, and a conical nozzle 24 is arranged above the combustion chamber 23; a first powder feeding port 11 is formed in the rear part of the gun seat 2, and the first powder feeding port 11 is horizontally arranged and communicated with a conical nozzle 24; the center of the gun barrel 1 is provided with a gun chamber 10, the gun chamber 10 is communicated with a conical nozzle 24, and the middle part of the gun barrel 1 is provided with a second powder feeding port 12 which is vertically arranged and is communicated with the gun chamber 10.
The gun barrel 1 and the gun seat 2 are integrally made of red copper, so that heat dissipation is fast. The conical nozzle 24 is made of ceramic material, such as tungsten carbide ceramic, and can resist high temperature. Further, the gun barrel 1 and the gun block 2 are provided with cooling water passages communicating with each other, and for example, a cooling water inlet 31 is provided at the right end of the gun barrel 1, and a cooling water outlet 32 is provided at the lower portion of the gun block 2.
Preferably, the entire length of the barrel 1 is 20-30cm, and the second powder feed port 12 is located 10-15cm from the muzzle (right-hand powder outlet) of the barrel.
The utility model discloses a supersonic speed flame spraying rifle is when carrying out the spraying coating, oxygen and fuel (liquid fuel such as hydrocarbon gas or aviation kerosene such as propane, propylene, alcohol) get into combustion chamber 23 from oxygen entry 21 and fuel entry 22 respectively and burn, the high temperature flame of production flows through conical nozzle 24 and gets into bore 10 with higher speed, carry from the first great particle diameter powder that send into of powder mouth 11 and send the less particle diameter powder that powder mouth 12 sent into from the second, spout 40 surfaces of base member from the muzzle, form the coating.
The particle size of the powder to be fed from the first powder feeding port 11 may be 80 μm or more, for example, 80 to 150 μm, and the particle size of the powder to be fed from the second powder feeding port 12 may be 80 μm or less, preferably 30 to 50 μm. The large-particle-size powder conveyed by the first powder feeding port 11 and the small-particle-size powder conveyed by the second powder feeding port 12 are mixed and adhered to each other in high-temperature high-speed flame flow, so that the separation on the surface of the substrate 40 can be reduced, the deposition efficiency is remarkably improved, and the deposition efficiency reaches over 50% in the Co-WC coating spraying process through tests.
The above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the claims of the present invention.
Claims (4)
1. A supersonic flame spraying gun with a two-way powder feeding structure is characterized by comprising a gun barrel and a gun seat, wherein the gun barrel is horizontally arranged, the gun seat is vertically arranged, and the gun seat is positioned behind the gun barrel;
the oxygen inlet and the fuel inlet are communicated with the combustion chamber, and the conical nozzle is arranged above the combustion chamber; a first powder feeding port is arranged at the rear part of the gun seat and is horizontally arranged and communicated with the conical nozzle; a bore is arranged in the center of the gun barrel and is communicated with the conical nozzle, and a second powder feeding port which is vertically arranged and is communicated with the bore is arranged in the middle of the gun barrel;
the particle size of the powder conveyed by the first powder feeding port is larger than that of the powder conveyed by the second powder feeding port.
2. A supersonic flame spray gun according to claim 1, wherein the length of the barrel is 20-30cm and the second powder feed port is 10-15cm from the muzzle of the barrel.
3. A supersonic flame spray gun according to claim 1, wherein the barrel and the butt are provided with communicating cooling water passages therein.
4. The supersonic flame spray gun of claim 1, wherein the barrel and the base are integrally formed of red copper, and wherein the conical nozzle is formed of ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920864562.9U CN210122586U (en) | 2019-06-11 | 2019-06-11 | Supersonic flame spraying gun with double-path powder feeding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920864562.9U CN210122586U (en) | 2019-06-11 | 2019-06-11 | Supersonic flame spraying gun with double-path powder feeding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210122586U true CN210122586U (en) | 2020-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920864562.9U Active CN210122586U (en) | 2019-06-11 | 2019-06-11 | Supersonic flame spraying gun with double-path powder feeding structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN210122586U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112725718A (en) * | 2020-12-28 | 2021-04-30 | 郑州立佳热喷涂机械有限公司 | Spraying powder feeding device with central powder feeding and transverse multistage powder feeding |
| WO2023111539A1 (en) * | 2021-12-16 | 2023-06-22 | The University Of Nottingham | Thermal spray system and coating |
-
2019
- 2019-06-11 CN CN201920864562.9U patent/CN210122586U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112725718A (en) * | 2020-12-28 | 2021-04-30 | 郑州立佳热喷涂机械有限公司 | Spraying powder feeding device with central powder feeding and transverse multistage powder feeding |
| WO2023111539A1 (en) * | 2021-12-16 | 2023-06-22 | The University Of Nottingham | Thermal spray system and coating |
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