| 摘要 |
This disclosure teaches a hydraulic crane for removing a horizontally-aligned relatively-long tube bundle, along with its tube sheet, from its shell. A winch, connectable to the tube sheet by means of a horizontal line, extracts the tube bundle. The crane has a boom comprising a proximal, an intermediate and a distal section mounted successively in inwardly telescoping relationship. A first boom point with a first hoisting sling depends from the intermediate section of the boom to support the tube bundle as it is being extracted from the shell. A second boom point with a second hoisting sling depends from the distal section of the boom also to engage the tube bundle as it is extracted further from the shell. The boom points are spaced apart sufficiently so that the first and second slings span a major portion of the length of the tube bundle whereby the tube bundle can be suspended and balanced safely.
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