US 6,824,453 B1 · Surface treatment nozzle

Abstract

There is described a surface treatment nozzle which generates a surface treatment jet that comprises a suspension of surface treatment material and gas and a surrounding liquid-containing jet for preventing dusting. The surface treatment jet has a high velocity compared with the velocity of solely liquid and is conveyed in an inner tube (13; 31) and the liquid is conveyed in a channel (12) between the inner tube and a tube (11) concentrically surrounding the inner tube. There is included a mixing arrangement (14, 15, 16; 22; 29, 30, 25) for mixing the liquid with gas upstream of the nozzle outlet and to impart to the liquid/gas mixture a velocity in the same order of magnitude as the velocity of the surface treatment jet at said outlet.

Claims14

Dependent claims

A surface treatment nozzle for generating (a) a surface treatment jet that comprises a suspension of surface treatment material and gas and (b) a liquid-containing surrounding jet for preventing dusting, wherein the velocity of the surface treatment jet is great than the velocity of solely liquid, and wherein the surface treatment jet is conveyed in an inner tube (13;

31) and the liquid is conveyed in a channel (12) defined between the inner tube and a tube (11) that surrounds said inner tube concentrically, the nozzle further comprising a mixing arrangement (14, 15, 16;
22;
29, 30, 25) for mixing the liquid with gas upstream of a nozzle outlet and imparting to the liquid/gas mixture a velocity of the same order of magnitude as the velocity of the surface treatment jet at said outlet.

A surface treatment nozzle for generating a surface treatment jet that includes a suspension of surface treatment material in a gas and separates a liquid-containing jet that surrounds the surface treatment jet, the nozzle comprising:

an inner tube conveying the suspension of the surface treatment material in the gas;
an outer tube surrounding said inner tube and defining a channel between said inner and outer tubes, a liquid for the liquid-containing jet being conveyed through the channel, wherein a velocity of the liquid in the channel is less than a velocity of the suspension conveyed through said inner tube;
an outlet for the surface treatment jet and the separate liquid-containing jet that surrounds the surface treatment jet;
and
mixing means for mixing the liquid from the channel with the gas from the inner tube upstream of said outlet and for imparting to the mixture of the liquid and the gas a velocity of the same order of magnitude as the velocity of the surface treatment jet at said outlet.

2 more elements

Dependencies are inferred from the claim text.

Surface treatment nozzle

Life of this patent

Surface treatment nozzle

Life of this patent

Abstract

Claims14