| 摘要 |
The invention is a plasma torch (1; 101; 201) of the type comprising: a first element (20) provided with a through opening (21) serving as an outlet for a plasma flow; a hollow electrode (19) that is developed longitudinally along a main axis (X) and is suited to be positioned with respect to said first element (20) in such a way as to define a striking area, of the type comprising a hollow cavity (25) that extends at least partially along the main axis (X); a first conveyance way (51, 52, 53) suited to convey a carrier gas towards said striking area; a second conveyance way (56, 56a, 56b) suited to convey a portion of the carrier gas towards the inner cavity (25) of the hollow electrode (19), the portion of the carrier gas being suited to cool the hollow electrode (19). This torch comprises conveyance means (59, 60a, 60b) suited to convey the carrier gas from the inner cavity (25) of the hollow electrode (19) towards a way so as not to affect the striking area. The invention concerns also a method of operation of a plasma torch (1; 101; 201). |
