Pipe welding backup apparatus

Details Pipe welding backup apparatus Pipe welding backup apparatus

B - Operations, Transporting

23

K

327/38, 269/4

B23K 5/22 (2006.01) B23K 9/035 (2006.01) B23K 37/053 (2006.01)

Patent

CA 1244527

ABSTRACT OF THE DISCLOSURE A welding backup shoe apparatus. The apparatus comprises a double-acting fluid cylinder having a piston rod extending from it. A first retainer shoe is attachable to the piston rod and a second retainer shoe is opposed to the first retainer shoe. A first backup shoe to be received by the first retainer shoe and at least two other backup shoes are received by the first retainer shoe and by the second retainer shoe. The backup shoe is arcuate externally to be a close fit within a pipe. A guide is attached to the first retainer shoe, slidably engaging the second retainer shoe to guide the movement of the retainer shoes relative to each other. A release device is attached to the cylinder to abut the first backup shoe; and cables attach the two other backup shoes to the cylinder. -19-

502712

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