A high temperature substrate surface gradient spray apparatus

Abstract

The utility model relates to a kind of high-temperature substrate surface gradient spraying equipment, including spray gun main body, the spray gun main body includes launch tube, spray head, mixing pipe and plasma generating mechanism, the spray head is located in the one end of launch tube, the mixing pipe has feed inlet and discharge port, the plasma generating mechanism has output, the discharge port of mixing pipe and the output of plasma generating mechanism are communicated launch tube, mixing pipe is equipped with stirring device between feed inlet and discharge port, the stirring device includes shaft and multiple stirring parts on shaft, the distance between adjacent two stirring parts gradually decreases from feed inlet to discharge port direction, the feed inlet of mixing pipe is equipped with multiple, each feed inlet is equipped with electric regulating valve for adjusting flow, the electric regulating valve is controlled by control system. It realizes real-time mixing real-time spraying, avoids the cost increase and adjustment difficult problem caused by pre-mixing.

Description

Technical Field

[0001] This utility model relates to a gradient spraying device for high-temperature substrate surfaces. Background Technology

[0002] Currently, in applications of high-temperature substrates, such as aerospace, energy and power, and automotive manufacturing, the requirements for substrate surface performance are becoming increasingly stringent. High-temperature substrates need to operate stably for extended periods in harsh environments such as high temperatures, corrosion, and abrasion, and traditional surface treatment methods often fail to meet their comprehensive performance requirements. Gradient spraying technology has emerged to address this need. It can form a coating with gradient changes in composition, structure, and properties on the substrate surface, enabling a good transition and matching between the coating and the substrate, as well as between different layers within the coating, thereby improving the overall performance of the substrate.

[0003] However, existing gradient spraying equipment has some problems in the mixing and spraying process of the spraying material. Many devices use a method of pre-mixing the spraying material before spraying, which not only increases the storage and transportation costs of the material, but also makes it difficult to adjust the composition and ratio of the material in a timely manner according to the actual spraying situation. Especially in some occasions where the coating performance requirements are extremely high and flexible adjustments are required, the pre-mixing method cannot meet the needs of real-time and precise spraying. Utility Model Content

[0004] Therefore, in view of the above problems, this utility model proposes a gradient spraying device for high-temperature substrate surface.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gradient spraying device for a high-temperature substrate surface, comprising a spray gun body, the spray gun body including an emission tube, a nozzle, a mixing tube, and a plasma generating mechanism, the nozzle being disposed at one end of the emission tube, the mixing tube having an inlet and an outlet, the plasma generating mechanism having an output end, the outlet of the mixing tube and the output end of the plasma generating mechanism being connected to the emission tube, a stirring device being provided in the mixing tube between the inlet and the outlet, the stirring device including a rotating shaft and multiple stirring elements disposed on the rotating shaft, the distance between two adjacent stirring elements gradually decreasing from the inlet to the outlet, the mixing tube having multiple inlets, each inlet being provided with an electric regulating valve for adjusting the flow rate, the electric regulating valve being controlled by a control system.

[0006] In a further improvement, the stirring component includes an impeller seat and at least two stirring blades disposed around the impeller seat, wherein the stirring blades form an angle of 30° to 60° with the axis of the impeller seat.

[0007] In a further improvement, in the two adjacent mixing components, the mixing blades of one mixing component are tilted clockwise, and the mixing blades of the other mixing component are tilted counterclockwise.

[0008] Further improvements include staggered agitation blades on two adjacent agitators around the shaft.

[0009] In a further improvement, the nozzle and the emission tube are connected by a thread.

[0010] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This utility model achieves real-time mixing and spraying by setting a mixing pipe on the spray gun body and directly mixing different spraying materials in the mixing pipe before spraying. This avoids the increased costs and adjustment difficulties caused by pre-mixing. By controlling the opening of the electric regulating valve, the flow rate of different spraying materials can be precisely controlled, thereby achieving flexible adjustment of the coating composition and ratio. Furthermore, at the inlet, as soon as the material enters the mixing pipe, the larger distance between the stirring components is conducive to the initial dispersion and flow of the material, avoiding material accumulation and blockage. As the material flows towards the outlet, the distance between the stirring components gradually decreases, the stirring intensity increases, and the material can be more finely stirred, ensuring that various components reach a highly uniform mixing state in a short time. This design allows for more thorough mixing of the spraying material, reducing differences in coating performance caused by uneven material mixing, thereby improving the uniformity and consistency of coating quality. Furthermore, the agitator includes an impeller seat and at least two agitator blades located around the impeller seat, with the agitator blades forming an angle of 30°–60° with the axis of the impeller seat. This structure enhances the axial and radial flow of materials within the mixing pipe, generating a stronger turbulence effect and ensuring thorough contact and mixing between materials. Furthermore, in the two adjacent agitators, one agitator blade is inclined clockwise, and the other is inclined counterclockwise. The nozzle is tilted and offset around the shaft, creating multi-directional fluid movement within the mixing tube during stirring. This further reduces dead zones, improves mixing efficiency, and ensures uniform mixing of the coating material, guaranteeing the formation of a high-quality gradient coating. Furthermore, the nozzle and ejector tube are connected by threads, facilitating nozzle disassembly and replacement. When the nozzle wears out or needs to be replaced with a different size to meet different spraying requirements, operators can easily and quickly disassemble and install it, reducing equipment downtime, lowering maintenance costs, and improving the overall reliability and lifespan of the equipment. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the mixing pipe of this utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the stirring device of this utility model.

[0014] icon:

[0015] 1. Emitting tube; 2. Nozzle; 3. Mixing tube; 31. Feed inlet; 32. Discharge outlet; 33. Electric regulating valve; 34. Solenoid valve; 4. Plasma generating mechanism; 41. Output end; 5. Stirring device; 51. Rotating shaft; 52. Stirring component; 521. Impeller seat; 522. Stirring blade; 523. Motor. Detailed Implementation

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0017] refer to Figure 1-3 This embodiment provides a gradient spraying device for high-temperature substrate surface, including a spray gun body. The spray gun body includes an emission tube 1, a nozzle 2, a mixing tube 3, and a plasma generating mechanism 4. The nozzle 2 is located at one end of the emission tube 1.

[0018] The mixing pipe 3 has an inlet 31 and an outlet 32. The mixing pipe 3 has multiple inlets 31, each of which is equipped with an electric regulating valve 33 for adjusting the flow rate. Each inlet 31 is connected to a material to be mixed. The electric regulating valve 33 is controlled by a control system. By controlling the opening of the electric regulating valve 33, the flow rate of different materials to be mixed into the mixing pipe 3 can be precisely controlled, thereby realizing flexible adjustment of the coating composition and ratio. A solenoid valve 34 is provided between the outlet 32 ​​of the mixing pipe 3 and the launching pipe 1. The solenoid valve 34 is controlled by a control system to ensure that the materials in the mixing pipe 3 are mixed evenly before entering the launching pipe 1.

[0019] The plasma generating mechanism 4 has an output end 41. The discharge port 32 of the mixing tube 3 and the output end 41 of the plasma generating mechanism 4 are connected to the emission tube 1. The function of the plasma generating mechanism 4 is to generate high-temperature plasma. This plasma can improve the bonding force between the sprayed material and the substrate, making the coating more firm. The plasma generating mechanism 4 of this utility model adopts the existing conventional structure, as long as it can stably generate plasma.

[0020] A stirring device 5 is provided inside the mixing pipe 3 between the inlet 31 and the outlet 32. The stirring device 5 includes a rotating shaft 51 and multiple stirring elements 52 disposed on the rotating shaft 51. The rotating shaft 51 is driven to rotate by a motor 523, and the rotation speed of the motor 523 is adjusted according to the mixing materials. There are five stirring elements 52, and the distance between two adjacent stirring elements 52 gradually decreases from the inlet 31 to the outlet 32. Each stirring element 52 includes an impeller seat 521 and a part disposed on the impeller seat 521. At least two stirring blades 522 are present around the perimeter. In this embodiment, each stirring element 52 is provided with three stirring blades 522. The angle between the stirring blades 522 and the axis of the impeller seat 521 is 30° to 60°. In two vertically adjacent stirring elements 52, the stirring blades 522 of one stirring element 52 are inclined in a clockwise direction, and the stirring blades 522 of the other stirring element 52 are inclined in a counterclockwise direction. The stirring blades 522 of two vertically adjacent stirring elements 52 are staggered around the rotating shaft 51 (e.g., Figure 3 (As shown).

[0021] In this embodiment, the nozzle 2 is connected to the emission tube 1 by a thread, and a high-temperature sealing gasket is used at the connection to facilitate the disassembly and replacement of the nozzle 2. When the nozzle 2 is worn or needs to be replaced with a nozzle of a different specification to meet different spraying requirements, the operator can easily and quickly disassemble and install it, reducing equipment downtime, lowering maintenance costs, and improving the overall reliability and service life of the equipment.

[0022] In operation, different materials to be mixed are controlled by an electric regulating valve 33 and enter the mixing pipe 3 through the inlet 31. Upon entering the mixing pipe 3, the relatively large distance between the stirring elements 52 facilitates initial dispersion and flow of the materials, preventing material accumulation and blockage. As the materials flow towards the outlet 32 ​​of the mixing pipe 3, the distance between the stirring elements 52 gradually decreases, increasing the stirring intensity and enabling finer mixing. Simultaneously, the specific angle between the stirring blades 522 and the impeller seat 521 axis, along with the special arrangement of the upper and lower stirring elements 52, enhances the axial and radial flow of the materials within the mixing pipe 3, generating a stronger turbulence effect. This ensures thorough contact and mixing between the materials, creating multi-directional fluid motion within the mixing pipe 3, further reducing dead zones, improving stirring efficiency, and ensuring that all components reach a highly uniform mixing state within a short time. The mixed materials converge with the plasma generated by the plasma generator 4 within the emission tube 1 and are finally ejected from the emission tube 1, spraying onto the surface of a high-temperature substrate. This real-time mixing and spraying design reduces waste caused by the deterioration of pre-mixed materials and lowers energy consumption during storage and transportation, thereby reducing overall costs.

[0023] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A gradient spraying device for high-temperature substrate surface, characterized in that: The device includes a spray gun body, which comprises an emission tube, a nozzle, a mixing tube, and a plasma generating mechanism. The nozzle is located at one end of the emission tube. The mixing tube has an inlet and an outlet. The plasma generating mechanism has an output end. The outlet of the mixing tube and the output end of the plasma generating mechanism are connected to the emission tube. A stirring device is provided inside the mixing tube between the inlet and the outlet. The stirring device includes a rotating shaft and multiple stirring elements mounted on the rotating shaft. The distance between two adjacent stirring elements gradually decreases from the inlet to the outlet.

2. The gradient spraying equipment for high-temperature substrate surface according to claim 1, characterized in that: The stirring component includes an impeller seat and at least two stirring blades disposed around the impeller seat, wherein the stirring blades form an angle of 30° to 60° with the axis of the impeller seat.

3. The gradient spraying equipment for high-temperature substrate surface according to claim 2, characterized in that: In two adjacent mixing components, the mixing blades of one mixing component are tilted clockwise, while the mixing blades of the other mixing component are tilted counterclockwise.

4. The gradient spraying equipment for a high-temperature substrate surface according to claim 2, characterized in that: The agitator blades of two adjacent agitators are offset around the shaft.

5. The gradient spraying equipment for a high-temperature substrate surface according to claim 1, characterized in that: The nozzle and the firing tube are connected by threads.

Images