Supersonic-speed electric arc spraying gun

Abstract

The invention provides a light and zero-pollution supersonic-speed electric arc spraying gun for opening up the technical field of micro-spraying thermal spraying. The supersonic-speed electric arc spraying gun comprises a compressed air delivering pipe, a positive pole wire feeding pipe, a negative pole wire feeding pipe and an insulating plate, wherein the positive pole wire feeding pipe and the negative pole wire feeding pipe are insulated mutually and carry current, the tail end of the compressed air delivering pipe is connected with a powder-gathering accelerating pipe, the tail ends of the positive pole wire feeding pipe and the negative pole wire feeding pipe are connected with conducting nozzles, the compressed air delivering pipe, the positive pole wire feeding pipe and the negative pole wire feeding pipe penetrate the insulating plate, and the positive pole wire feeding pipe and the negative pole wire feeding pipe are arranged on one side of an air delivering pipe and are arranged in the compressed air delivering pipe at an included angle of 45-75 degrees. The supersonic-speed electric arc spraying gun opens up the technical field of micro-spraying thermal spraying, is light and zero-pollution and improves the thermal spraying quality.

Description

technical field [0001] The invention relates to the technical field of thermal spraying of surface engineering, in particular to a supersonic arc spray gun in the field of electric arc micro-spraying. Background technique [0002] The damage caused by corrosion in modern industry, especially in oil development and processing industry, is one of the important damage factors. It will not only cause early failure of equipment, but also often cause sudden and vicious accidents, resulting in huge economic losses and personal casualties, as well as serious social consequences. Every year in the world, 1 ton of steel corrodes into rust in every 90 tons of steel, while refining The energy required by 1 ton of steel can be used by a family for 3 months. The World Corrosion Survey Report shows that the national economy has paid a huge price for corrosion, and its value can account for 1%-5% of the GNP of each country. The economic loss is about $700 billion. An investigation agency ...

AI Technical Summary

Problems solved by technology

[0005] 1. The equipment is bulky and inconvenient to operate, which cannot solve the high-altitude maintenance;

[0006] 2. Unable to solve the long-term anti-corrosion problem of inner holes below 100mm;

[0007] 3. The spray deposition rate is only 60%, and 40% of the material splashes into the air, which pollutes the environment and wastes materials;

[0008] 4. The large scattered arc of spraying will seriously pollute the environment. People cannot stand within 20 meters around without protection, which will cause damage to human body and plants;

[0009] 5. Due to the degree of technical mastery of the operator, such as poor grasp of the spraying distance, it is easy to cause problems such as uneven coating thickness and unstable quality

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