| 摘要 |
A device for installing a screw-driven, expandable camlock mechanism in a steam generator host tube to effectuate inspections of or repairs to a steam generator tube or tube sheet is disclosed herein. The device comprises a double gimbal camlock installation assembly capable of vertically aligning the camlock mechanism, which has a deformable sleeve disposed thereon, with a steam generator host tube and capable of installing the camlock mechaism in the steam generator host tube. The installation assembly includes a double gimbal having a pivotal first ring disposed in and connected to a pivotal second ring which is disposed between and connected to the tines of a U-shaped fork. Attached to the first ring is a housing having a rotation device disposed therein, which rotation device engages a threaded rod that is connected to the camlock mechanism. When the rotation device is actuated, the rod is rotated such that the camlock mechanism causes the deformable sleeve to elastically deform and engage the inside surface of the steam generator host tube. Repair tools are attached to the installation assembly for repairing the steam generator tube and tube sheet. Following the repair, the repair tools are removed from the installation assembly and the rotation device is reactuated so that the sleeve is disengaged from the inside surface of the steam generator host tube. The camlock mechanism is then removed from the steam generator host tube.
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