| 摘要 |
<p>A plasma torch for cutting, wherein a nozzle (2) is protected against dross produced by piercing at the start of cutting and double arcs are prevented from occurring to improve the service life of the nozzle (2). To ensure such functions, a nozzle protecting cap (5) forming an annular secondary gas path (8) is fitted over a nozzle cap (4) in a manner of being electrically insulated from an electrode (1) and the nozzle (2), and insulators (14) made of an electrically insulating material are mounted in said secondary gas path (8), by which secondary gas is baffled and swirled.</p> |
