Crane for extracting horizontally-aligned relatively-long tube bundles

Claim 1

A crane for extracting horizontally-aligned relatively-long tube bundles, comprising a tube sheet with U-shaped tubes connected thereto, from a shell and comprising in combination: a body provided with means for driving and maneuvering the body, a boom mounted on the body and comprising a proximal section near the body as well as an intermediate section and a distal section remote from the body, the intermediate section mounted telescopically within the proximal section and the distal section mounted telescopically within the intermediate section, first boom-length regulating means for moving the intermediate section relative the proximal section and second boom-length regulating means for moving the distal section relative the intermediate section, a winch connectable by means of a horizontal line to the tube sheet for extracting the tube sheet and the tube bundle from the shell, a first boom point mounted on the intermediate section remote from the body and provided with a first hoisting means, a first sling arranged for embracing the tube bundle and attached to the first hoisting means to provide a first support for the tube bundle as it is extracted from the shell, a second boom point mounted on the distal section remote from the body and provided with a second hoisting means, a second sling arranged for embracing the tube bundle and attached to the second hoisting means to provide a second support for the tube bundle as it is extracted further from the shell, the second boom-length regulating means organized to space the first and second boom points apart sufficiently to permit the first and second slings to span a major portion of the length of the tube bundle.