Plasma torch for cutting use with nozzle protection cap having annular secondary GPS passage and insulator disposed in the secondary gas passage
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United States of America Patent
Stats
-
Feb 28, 1995
Grant Date -
N/A
app pub date -
Aug 18, 1993
filing date -
Feb 28, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A plasma torch for cutting use comprises a torch body, a water-cooled electrode arranged in the torch body, a nozzle arranged outside the electrode so as to cover the electrode through a plasma gas passage formed therebetween, a nozzle cap covering the nozzle, a nozzle protection cap having, on its front end side, an opening opposing to an orifice of the nozzle and being disposed outside the nozzle cap through an annular secondary gas passage communicating with the opening, the nozzle protection cap being arranged in the secondary gas passage in an electrically insulated state from the electrode and the nozzle, and an insulator disposed in the secondary gas passage and formed of an electrically insulating material, the insulator having a rectifying passage for rectifying a gas flow passing the secondary gas passage. The nozzle protection cap is composed of a front end portion and a base end portion secured to the torch body and the front end portion and the base end portion are detachably coupled with each other.
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