Device for high speed flame spraying of refractory wire of powde

Details Device for high speed flame spraying of refractory wire of powde Device for high speed flame spraying of refractory wire of powde

1992-11-24

1993-08-10

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

With means fusing solid spray material at discharge means

2391323, B05B 720, C23C 412

Patent

active

052341640

ABSTRACT:
The invention relates to a process for high-speed flame spraying of refractory wire and powder weld filler for the coating of surfaces, using at least two gas mix systems operating independently of each other, with which the wire or powder spray weld filler brought into the primary chamber is melted by primary heating flames arranged concentrically around a charging channel, accelerated with the resulting high-speed flame and conveyed through an expansion nozzle into a downstream secondary combustion chamber; the latter is streamed through while the molten plastic weld filler is carried along by the primary high-speed flame at supersonic speed, which runs into an axially centrally widened, downstream and water cooled secondary expansion nozzle, or into its bore, so that in the area of radially, axially and focusingly arranged secondary fuel gas-oxygen channels running into the secondary combustion chamber a partial vacuum area is produced and a hot gas mixture with low streaming pressures can be added, whereby in the secondary chamber radially, axially around the primary high-speed flame the heating gas mixture ignites, expands and because of a high flame temperature and extreme rates of flame propagation and combustion contributes to melting the remainder of the spray weld filler and to its additional acceleration.

REFERENCES:
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patent: 4358053 (1982-11-01), Ingham et al.
patent: 4666397 (1987-05-01), Wenning et al.
patent: 4865252 (1989-09-01), Rotolico et al.
patent: 4964568 (1990-10-01), Rotolico et al.
patent: 5005764 (1991-04-01), Simm et al.
patent: 5014915 (1991-05-01), Simm et al.

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