Plasma arc torch with vented flow nozzle retainer

Details Plasma arc torch with vented flow nozzle retainer Plasma arc torch with vented flow nozzle retainer

1997-08-01

2000-07-04

Paschall, Mark

Electric heating

Metal heating

By arc

219 75, 2191215, 21912151, B23K 1000

Patent

active

060841990

ABSTRACT:
A flow of ionizable gas is provided to a shielded plasma arc torch which includes an electrode, a translatable nozzle, a nozzle retainer, and a shield. After passing through a heat exchanger to cool the electrode, the gas flow enters an annular chamber where the flow is divided into three subflows. A first subflow enters a plasma chamber formed by the electrode, the nozzle, and a swirl ring to pressurize the plasma chamber and support a plasma arc. The second subflow passes serially through apertures in the nozzle retainer and the shield to shield the plasma arc. The remaining flow is vented to ambient. Accordingly, a single gas flow may be employed to independently support multiple torch operating requirements.

REFERENCES:
patent: 4748312 (1988-05-01), Hatch et al.
patent: 4861962 (1989-08-01), Sanders et al.
patent: 4902871 (1990-02-01), Sanders et al.
patent: 5396043 (1995-03-01), Couch, Jr. et al.
"Powermax 800"; cover sheet, 7 pgs.;(1995).

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