B - Operations – Transporting – 23 – Q
Patent
B - Operations, Transporting
23
Q
269/4, 78/64
B23Q 3/00 (2006.01) B23K 37/053 (2006.01)
Patent
CA 1172276
ABSTRACT OF THE DISCLOSURE A fixture for clamping two abutting pipe sections together while they are being welded, including an expandable section com- prising a plurality of longitudinal segments arranged to nest together and form a central bore, a spring member encircling the nest of segments to retain the segments yieldingly in their nest- ing relation to each other, a first body having an internal bore aligned with that of the nested segments and providing a conical wedge surface inclined in the direction of the nest, and a second body having an internally threaded bore aligned with the bore of the nested segments and providing a conical wedge surface inclined in the direction of the nest, whereby the movement of the first and second bodies toward the nest engages the nest with their conical wedge surfaces to overcome the spring force to radially move the segments from their bore. A threaded rod extends through the axially aligned bores of the first body and the bore of the nest to bring a shoulder on the threaded rod against the first body and into threaded engagement with the second body. Means is provided for preventing rotation of the second body. Means is provided for rot- ating the threaded rod in its engagement with the second body threads whereby rotation of the threaded rod in its engagement with the threads of the second body moves the first and second bodies toward and away from each other to alternately expand and contract the expandable section. A sleeve member with a bore sized to journal the sleeve freely over the threaded rod comprises means for axially spacing the sleeve member from the expandable section, and a shoulder formed on the sleeve member is sized to engage the non- abutting end of one of the pipes. Means is provided for fixing the axial position of the sleeve member along the threaded rod to engage the pipe and sleeve shoulder to bring the other end of the pipe to its junction with the end of the second pipe, and passage- ways are formed through the sleeve member to establish a flow of inert gas through the pipes.
401267
Abb Alstom Power Inc.
Smart & Biggar
LandOfFree
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