Shot blasting spray gun

Abstract

The invention provides a shot blasting spray gun, comprising a main body, a mixing chamber arranged in the main body, an air inlet pipe communicated with an opening at the front end of the mixing chamber, a nozzle communicated with the opening at the rear end of the mixing chamber and a shot inlet pipe communicated with the opening on a side wall of the mixing chamber, wherein the mixing chamber is provided with the front end, the rear end and the side wall arranged between the front end and the rear end, the front end, the rear end and the side wall are all provided with openings; and the air inlet pipe is provided with an extension part arranged in the main body, and the extension part of the air inlet pipe extends to a position almost parallel to the initial point of the nozzle in the main body. The extension part of the air inlet pipe in the mixing chamber is almost parallel to the initial point of the nozzle, thus the air inlet pipe is far away from a shot blasting opening and the air inlet pipe can be avoided from being damaged rapidly; and meanwhile, air current can enter into the nozzle in an almost zero-loss way, and the effective blasting dynamic can be improved.

Description

technical field [0001] The invention relates to a shot blasting spray gun device, in particular to a shot blasting spray gun device used for strengthening traction gears of heavy-duty locomotives. Background technique [0002] At present, heavy-duty railway freight has become an important trend in the development of my country's railway transportation. Therefore, quite high requirements are put forward for the anti-wear, anti-glue and anti-fatigue capabilities of heavy-duty locomotive traction gears. As an effective surface treatment process, shot peening can significantly improve the fatigue strength and fatigue life, surface strength and hardness, pressure corrosion resistance and high temperature oxidation resistance of materials by introducing residual compressive stress. The shot peening gun is an important component of the shot peening equipment, and the structure of the shot peening gun has a great influence on the shot peening effect. Traditional spray gun structur...

AI Technical Summary

Problems solved by technology

This structure has the following disadvantages: the length of the air inlet pipe 1 extending into the mixing chamber 3 is short, and the vicinity of the nozzle is easy to wear, and the pipe will affect the strength of the air injection after being bent by the projectile.

The nozzle 5 is only composed of a constriction section and a diffusion section, and the two sections are easy to wear, and there is no smooth transition zone between the two sections, which is not convenient for pellet acceleration

The air inlet pipe 1 and the projectile inlet pipe 2 are equal to the sawtooth height of the wear-resistant rubber connecting sawtooth section, and the slope of the sawtooth is relatively slow, which is not conducive to the connection of the rubber pipe, or the rubber pipe is easy to fall off after being connected

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