| 摘要 |
A tube plugging tool positioner includes a body and a locating member mounted on the body. The body is attached to the end of a tube plugging tool for movement therewith through a heat exchanger tube. The locating member is retracted relative to the body during movement of the positioner through a tube, and is extended as the body passes out of the remote end of the tube. The tube plugging tool is then positioned relative to the tube by withdrawing the positioner to the extent permitted by the locating member. The positioner may be either spring or gravity actuated, and is constructed for movement through a heat exchanger tube even though the tube has foreign matter in it or has holes through it.
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