CN210237746U - Spraying device for ultra-high performance tungsten carbide - Google Patents
Spraying device for ultra-high performance tungsten carbide Download PDFInfo
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- CN210237746U CN210237746U CN201920412393.5U CN201920412393U CN210237746U CN 210237746 U CN210237746 U CN 210237746U CN 201920412393 U CN201920412393 U CN 201920412393U CN 210237746 U CN210237746 U CN 210237746U
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Abstract
The utility model discloses a spraying device for ultra-high performance tungsten carbide, which comprises a body, wherein a storage tank is arranged below the body, a nozzle is arranged at the end part of the body, a powder feeding nozzle communicated with the storage tank is arranged in the nozzle, the powder feeding nozzle comprises a powder feeding nozzle inner core and a hollow external thread sleeve joint, the powder feeding nozzle inner core is of a horizontal middle character structure, and the outer walls of two ends are of smooth structures; the inner wall of the hollow external thread sleeve joint is of a smooth structure, the outer wall of the hollow external thread sleeve joint is of an external thread structure, and the inner diameter size of the hollow external thread sleeve joint is matched with the outer diameter sizes of two ends of the inner core of the powder feeding nozzle; one end of the hollow external thread sleeve joint is provided with a sealing ring, and the sealing ring and the hollow external thread sleeve joint are of an integrated structure. Simple structure, the equipment is convenient, can realize quick replacement to the cost of manufacture reduces by a wide margin.
Description
Technical Field
The utility model relates to a spraying device especially relates to the improvement to tungsten carbide spraying device.
Background
The supersonic flame spraying is to burn liquid fuel such as hydrocarbon fuel gas such as propane, propylene and the like and high-pressure oxygen in a combustion chamber or a special nozzle to generate high-temperature and high-pressure flame flow, wherein the temperature is 3200 ℃, and the flame speed is more than 1500-2000 m/s. The powder is fed axially or radially into the flame to produce molten or semi-molten particles which impinge at high velocity on the substrate surface for deposition, thereby achieving a higher bond strength, denser, high quality coating.
When the existing supersonic spraying equipment is used for spraying carbide coatings such as tungsten carbide and the like, because the decarburization phenomenon is easy to generate, a nozzle is easy to block, and air impurities brought into the coatings by air disturbance at the outlet of a spray gun are relatively more, so that the compactness of the coatings is poor and the overall hardness is influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a spraying device for ultra-high performance tungsten carbide, which eliminates the blocking phenomenon in the spraying process, and the void ratio and the microhardness of the tungsten carbide coating are improved and improved.
The utility model discloses a following technical scheme realizes: a spraying device for ultra-high performance tungsten carbide comprises a supersonic spraying device, wherein the supersonic spraying device comprises a powder feeder, a combustion chamber and a nozzle, and the nozzle comprises a contraction section, a throat part and a diffusion section; the diffusion section comprises an expansion section and a wave elimination section; the length of the throat part is 20-35 mm; the length of the extinction band is 20-30 mm.
The utility model increases the length of the throat part, so that the airflow is sprayed out after high-pressure contraction, the impulsive force of the airflow is increased, and the blockage is reduced; meanwhile, the wave absorption section length of the diffusion section is further prolonged, air disturbance is reduced, blockage is eliminated, and the uniformity of air flow at the outlet of the nozzle is guaranteed.
According to another embodiment of the present invention, the powder feeder comprises compressed air and propane in liquid state, thereby reducing the cost. The ratio of propane to compressed air is approximately 1: 1; specifically, it may be 84: 88, etc.
According to the utility model discloses another embodiment, the spraying equipment is equipped with the storage tank, and the storage tank is connected with the powder feeder. The powder feeding gas (propane and compressed air) is conveyed through the storage tank, so that the using amount of the powder feeding gas is met.
According to another embodiment of the present invention, the spray device further comprises a moving device for driving the supersonic spray equipment to move; the supersonic spraying equipment is automatically driven to move and spray, so that the automation degree is improved, and the spraying quality and the spraying efficiency are improved.
The moving device comprises 2 upright posts and a cross bar; the cross bar is positioned between the 2 cross bars and is H-shaped; the cross bar is connected with the 2 upright posts in a sliding manner;
the cross bar is provided with a slide rail and a slide block base; the supersonic spraying equipment is fixed on the slide block base.
According to the utility model discloses another embodiment, the supersonic speed spraying equipment is detachable fixed with the slider base.
According to the utility model discloses another embodiment, mobile device still includes the fixed plate, and affiliated fixed plate is fixed in the stand top.
According to the utility model discloses another embodiment, the storage tank sets up on the fixed plate, through the conveying from top to bottom, further makes the air current even.
Drawings
FIG. 1 is a schematic structural view of a supersonic spraying apparatus according to embodiment 1;
fig. 2 is a schematic structural diagram of the mobile device according to embodiment 1.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
A spray coating device for ultra-high performance tungsten carbide comprises a supersonic spray coating device 4, wherein the supersonic spray coating device 4 comprises a powder feeder 1, a combustion chamber 2 and a nozzle, and the nozzle comprises a contraction section 31, a throat 32 and a diffusion section 33; the diffuser section 33 includes an expansion section 331 and a clip section 332; the length of the throat part 32 is 20-35 mm; the length of the extinction band 332 is 20-30 mm. In the embodiment, the length of the throat part 32 is increased, so that the airflow is sprayed out after being contracted under high pressure, the impulsive force of the airflow is increased, and the blockage is reduced; meanwhile, the length of the wave absorption section 332 of the diffusion section 33 is further prolonged, air disturbance is reduced, blockage is eliminated, and the uniformity of air flow at the outlet of the nozzle is guaranteed.
Specifically, the powder feeder 1 contains liquid compressed air and propane, so that the cost is reduced. The ratio of propane to compressed air is approximately 1: 1; specifically, it may be 84: 88, etc.
The spraying equipment 4 is provided with a storage tank 8, and the storage tank 8 is connected with the powder feeder 1. The powder feeding gas (propane and compressed air) is conveyed through the material storage tank 8, so that the using amount of the powder feeding gas is met.
The spraying device also comprises a moving device for driving the supersonic spraying equipment 4 to move; the supersonic spraying equipment 4 is automatically driven to move and spray, so that the automation degree is improved, and the spraying quality is improved. The moving device comprises 2 upright posts 5 and a cross bar 6; the cross bar 6 is positioned in the middle of the 2 cross bars 6 and is H-shaped; the cross bar 6 is connected with the 2 upright posts 5 in a sliding manner; in this embodiment, 2 columns 5 are fixed on the base 51; the cross rod 6 is provided with a slide rail and a slide block base; the supersonic spraying equipment 4 is fixed on the slide block base. Meanwhile, a driving motor for driving the cross rod 6 and the sliding block base to slide is further arranged. It can also include 4 or 6 columns 5, etc.; 4 or 6 stand columns 5 are oppositely arranged, correspondingly, the cross rod 6 is arranged between the 4 or 6 stand columns 5 which are oppositely arranged and is arranged in a sliding way. So that the supersonic spraying apparatus 4 can be moved in the up-down and left-right directions.
The supersonic spraying equipment 4 is detachably fixed with the slide block base. For example. And is fixed by means of matching screw threads of the connecting rod 41. The moving device further comprises a fixed plate 7, and the fixed plate 7 is fixed above the upright post 5. The material storage tank 8 is arranged on the fixing plate 7, and the air flow is further uniform through the conveying from top to bottom.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (7)
1. A spraying device for ultra-high performance tungsten carbide comprises a supersonic spraying device, wherein the supersonic spraying device comprises a powder feeder, a combustion chamber and a nozzle, and the nozzle comprises a contraction section, a throat part and a diffusion section; the diffusion section comprises an expansion section and a wave elimination section; it is characterized in that the length of the throat part is 20-35 mm; the length of the extinction band is 20-30 mm.
2. A spray assembly according to claim 1 wherein: the powder feeder comprises liquid compressed air and propane.
3. A spray assembly according to claim 1 wherein: the spraying equipment is provided with a storage tank, and the storage tank is connected with the powder feeder.
4. A spray assembly according to claim 3 wherein: the spraying device also comprises a moving device for driving the supersonic spraying equipment to move;
the moving device comprises 2 upright posts and a cross bar; the cross bar is positioned in the middle of the 2 cross bars and is H-shaped; the cross bar is connected with 2 upright posts in a sliding manner;
the cross rod is provided with a slide rail and a slide block base; the supersonic spraying equipment is fixed on the sliding block base.
5. A spray assembly according to claim 4 wherein: the supersonic spraying equipment is detachably fixed with the slide block base.
6. A spray assembly according to claim 4 wherein: the moving device further comprises a fixing plate, and the fixing plate is fixed above the upright post.
7. A spray assembly according to claim 6 wherein: the storage tank is arranged on the fixing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920412393.5U CN210237746U (en) | 2019-03-28 | 2019-03-28 | Spraying device for ultra-high performance tungsten carbide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920412393.5U CN210237746U (en) | 2019-03-28 | 2019-03-28 | Spraying device for ultra-high performance tungsten carbide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210237746U true CN210237746U (en) | 2020-04-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920412393.5U Active CN210237746U (en) | 2019-03-28 | 2019-03-28 | Spraying device for ultra-high performance tungsten carbide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210237746U (en) |
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2019
- 2019-03-28 CN CN201920412393.5U patent/CN210237746U/en active Active
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