| 摘要 |
Tube plugs in several embodiments are provided for plugging and sealing off a defective tube in a heat exchanger to effect a seal at a location within the tube, spaced away from the tube end. The tube plug includes a deformable cylindrical sleeve member which is placed into the tube end, and has a peripheral shoulder thereon which abuts against the tube end to position an interior tapered portion of the sleeve, adjacent to its other open end, at the desired location of the seal to be formed within the tube, and a hard plug member, having a comating tapered portion, which is either hammered into the sleeve or tightened and pulled outwardly depending upon the direction of the engaging tapered surfaces, to deform the sleeve and form the tube seal in the zone of the tapered surfaces.
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