DEVICE FOR WELDING NONTURNABLE BUTT JOINTS OF PIPES Russian patent published in 2005 - IPC

FIELD: mechanical engineering; welding.

SUBSTANCE: invention relates to welding facilities designed for welding nonturnable butt joints of small diameter pipes. Proposed device has split housing, chuck plate 3 with outer gear rim carrying welding torch 5 with electrode 7 and nozzle to feed shielding gas 6, and worm drive 8. Split housing consists of two parts, movable part 2 and fixed part 1. Movable part is loaded by spring 12 and is installed for turning around axle 15 relative to fixed one. Split of housing coincides in plane with split of chuck plate, and worm drive is coupled with gear rim 4 of chuck plate by means of intermediate gear wheel 10 installed on axle in fixed part of housing. Jet 11 is installed at side of chuck plate opposite to welding torch on one axis with check plate. Thanks to it quality of weld is improved owing to creating closed working zone at welding, provision of gauge pressure of shielding gas and directed movement of shielding gas from nozzle to jet.

EFFECT: reduced mounting space required for fitting device on pipes to be welded.

3 cl, 3 dwg