Flame burner and method for flame burning a metallic surface
OwnerEgon Evertz, Ralf Evertz +1inventors
InventorsEgon Evertz, Ralf Evertz, Stefan Evertz
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Abstract
The invention relates to a flame burner having a nozzle (10) disposed in a head, wherein in addition to annularly disposed gas supply channels (11) the nozzle has a central gas supply opening (12), which has a laval nozzle-like region and a stabilizing region having a consistent diameter connected thereto in the flow direction. In order to flame burn a metallic surface the oxygen gas guided through a central nozzle of a flame burner is incited to oscillate in such a manner, such that a pulsating oxygen flow exiting the nozzle mouth is formed at the speed of sound, or at supersonic speed.
Claims11
A flame burner having a nozzle disposed in a head, wherein in addition to annularly disposed gas-supply passages the nozzle has a central gas-supply duct wherein the central gas-supply duct has directly succeeding regions in the flow direction, namely
- a first region tapering in to a minimal inner diameter,
- a second region whose inner surface flares to a larger diameter than the minimal diameter, and
- a third region extending up to the nozzle outlet mouth and having a uniform cross-sectional profile, preferably a uniform cylindrical inner diameter.
A method for flame burning a metallic surface, the method comprising the steps of:
- feeding gaseous oxygen guided through a central nozzle of a flame burner;
- and
- controlling flow of the gaseous oxygen in the burner such that the gaseous oxygen is made to oscillate such that and a pulsating oxygen flow exiting the nozzle outlet mouth is formed at the speed of sound or at supersonic speed.
Dependencies are inferred from the claim text.