| 主权项 |
1. An electric arc torch, comprising:
a torch base; a cooling conduit removably connected to the torch base, the cooling conduit comprising a conduit wall forming a central axial bore for conveying shielding gas through the cooling conduit,
wherein:the cooling conduit includes a plurality of longitudinal cooling channels within the conduit wall and spaced circumferentially around the central axial bore, the longitudinal cooling channels extending longitudinally through the conduit wall from a first end portion of the cooling conduit adjacent the torch base to a second end portion of the cooling conduit distal from the torch base,the longitudinal cooling channels include both a plurality of cooling liquid distribution channels and a plurality of cooling liquid return channels alternately arranged within the conduit wall,the cooling conduit includes a circumferential cooling liquid manifold located at the first end portion of the cooling conduit and in fluid communication with each of the cooling liquid distribution channels,the cooling conduit includes a circumferential return manifold located at the first end portion of the cooling conduit and in fluid communication with each of the cooling liquid return channels, andthe cooling conduit includes a circumferential recirculation manifold located at the second end portion of the cooling conduit and in fluid communication with each of the cooling liquid distribution channels and each of the cooling liquid return channels such that the cooling liquid distribution channels are in fluid communication with the cooling liquid return channels through the circumferential recirculation manifold, and an electrical conductor, located within the central axial bore of the cooling conduit, that conducts welding current through the welding torch. |
