TORCH FOR GAS-SHIELDED ELECTRIC ARC WELDING Russian patent published in 1998 - IPC

FIELD: mechanical engineering; welding facilities. SUBSTANCE: inner and outer circular channels are designed to deliver shielding gases to electrode and welding pool. Inner circular channel is located directly around electrode. Outer circular channel is made in form of truncated cone with its larger base pointed downwards. Thickness of outer circular channel decreases from top to bottom. Circular channel is connected at the top with swirling ring chamber provided with multiple-start screw channels made in form of outer square or trapezoidal thread on thick walled branch pipe with outer branch pipe tightly fitted on from outside. Swirling ring chamber is provided at the top with inlet ring chamber with branch pipe connected with superheated steam generator. EFFECT: consumption of shielding gas with enhanced stability of local protection against disturbances of ambient medium, improved quality of weld joints. 5 dwg