| 摘要 |
<p>The plasma torch (1) comprises a torch body (2) traversed by a water supply conduit (13), a unit for creating a vortex of water supplied by the water supply conduit, an upstream nozzle (6), an electrode (4, 5), and a torch head (3) detachably carrying the upstream nozzle and the electrode. The torch body is made of an electrically conductive material having a thermal conductivity of >= 50 W/mK. The water supply conduit is made of an electrically insulating material having an electrical resistivity of 10 1> 1>Ohm.cm. The vortex creating unit comprises a downstream nozzle. The plasma torch (1) comprises a torch body (2) traversed by a water supply conduit (13), a unit for creating a vortex of water supplied by the water supply conduit, an upstream nozzle (6), an electrode (4, 5), and a torch head (3) detachably carrying the upstream nozzle and the electrode. The torch body is made of an electrically conductive material having a thermal conductivity of >= 50 W/mK. The water supply conduit is made of an electrically insulating material having an electrical resistivity of 10 1> 1>Ohm.cm. The vortex creating unit comprises a downstream nozzle arranged downstream of the upstream nozzle, and grooves, openings or conduits arranged tangentially to an outlet of the downstream nozzle. An independent claim is included for a method for cutting a metallic material, by plasma jet, using a plasma torch.</p> |
