| 摘要 |
<p>An apparatus (1) for the axial movement of piping (2) comprises a support frame (5), and a pair of hoisting elements (11,13) one thereof fixed to the frame (5) and one thereof movable, sliding on guides (12); the apparatus further comprises actuation means for the movement of a hoisting element, giving thereto a cyclic reciprocating motion along the guides (12) between a bottom dead center (BDC) and a top dead center (TDC); such a motion, in conjunction with the action of tightening means prearranged therefor, allow the axial movement of the piping.</p> |
