PLASMA TORCH WITH IMPROVED COOLING SYSTEM AND CORRESPONDING COOLING METHOD

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).

主权项

1. A plasma torch (1; 101; 201) 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 adapted to be positioned with respect to said first element (20) in such a manner as to define a striking area, said hollow electrode (19) comprising an inner cavity (25) that extends at least partially along said main axis (X); a first conveyance way (51, 52, 53) adapted to convey a carrier gas towards said striking area; a second conveyance way (56, 56a, 56b) adapted to convey a portion of said carrier gas from said first conveyance way towards said inner cavity (25) of said hollow electrode (19), said portion of said carrier gas being adapted to cool said hollow electrode (19), wherein the plasma torch further comprises a conveyance device (59, 60a, 60b) adapted to convey an entirety of said portion of said carrier gas from said inner cavity (25) of said hollow electrode (19) towards a way so as not to affect said striking area.