| 摘要 |
The pipe welding apparatus includes a longitudinally movable welding station, a longitudinally movable nest housing a traveller including a pipe aligner and expander and a traction assembly. A pair of pipe sections are butted one to the other and the welding station is displaced into alignment with the joint. The nest is moved to an end of a pipe section remote from the joint and the traveller moves from the nest through the pipe section to the joint. The pipe aligner and expander has a plurality of circumferentially arranged shoes which move radially outwardly to enlarge the butting end portions of the pipe sections and to draw the pipe sections axially toward one another when welding. The welding station includes an induction welder. Upon completion of the welding, the traveller returns to the nest.
|
