Apparatus for aerohydrodynamic abrasive cleaning of surfaces, sprayer for the same, and method for aerohydrodynamic abrasive cleaning of surfaces

Abstract

An apparatus for mechanical spray treatment of materials has a container for preparing an abrasive suspension, the container having a stirring mechanism including a stirrer provided with at least one blade, and a sprayer for spraying the abrasive suspension connected to the container and a compressed gas supply device. The stirrer of the stirring mechanism has a comminuting cutter provided thereon in the bottom part of the container. The method for aerohydrodynamic abrasive cleaning of surfaces includes entraining the abrasive suspension flow in compressed gas to produce aerosol particles and directing the stream of aerosol particles from the sprayer nozzle to a surface. Moreover, after aerosol particles have been formed they are accelerated owing to the sprayer design within the sprayer before they are ejected from the nozzle. The method and device help improve the output, efficiency, and quality of cleaning by improving the uniformity of abrasive material grains used and imparting a high velocity to the suspension spray, expanding the area of effective cleaning, and distributing the aerosol particles therein in an optimal proportion.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]Applicant claims priority under 35 U.S.C. §119 of Russian Application No. 2010110986 filed Mar. 23, 2010, the disclosure of which is incorporated by reference.BACKGROUND OF THE INVENTION[0002]The group of inventions relates to mechanical spray treatment of materials and can be used in various fields for cleaning any surfaces from organic and inorganic dirt, removing coatings, including coating removal layer by layer; for imparting new adhesive properties to the surface cleaned; combining surface cleaning and passivating; and cleaning many types of items meeting specific requirements to fatigue strength and uncontrollable chemical processes in operation.[0003]The invention can be used in the heavy and metal industries, for example, on the shop floor of metal making plants for removing scale from the surface of semi-manufactured products made of ferrous and nonferrous metals; in blank production shops of mechanical engineering plants for re...

AI Technical Summary

Benefits of technology

[0011]The technical result of the claimed group of inventions consists in increasing output, efficiency, and quality of cleaning by improving the uniformity of abrasive material grains and imparting a high velocity to the suspension spray, enlarging the effective cleaning area, and achieving optimal distribution of abrasive particles and water therein.

[0017]The grain non-uniformity problem has been resolved by providing the apparatus with a comminuting cutter, a structural element that makes the mass uniform and suitable for producing an AHD mixture and helps grind larger grains to a particle size of 100 μm to 300 μm that are more effective in cleaning a larger area in square meters per hour.

Problems solved by technology

The prior art apparatus is disadvantageous because of the low quality of cleaning by mixtures containing relatively coarse and / or nonuniform grains.

The prior art sprayer is disadvantageous because of its low cleaning efficiency due to improper matching of the suspension spray velocity, concentration of abrasive particles in the suspension, and the shape and effective area of the cleaning flare.

The prior art method is disadvantageous because of its low cleaning efficiency due to improper matching of the suspension spray velocity, concentration of abrasive particles in the suspension, and the shape and effective area of the cleaning flare.

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