Abb Reaktor Gmbh

Wolfgang Kalthoff

Jakob Russ

Closure plugs have heretofore been required in an apparatus for stabilizing an unstable tube of a heat exchanger with a weakened wall region, in addition to providing a stabilizer. Furthermore, differing inside diameters can often not be bridged with the spreading range of the stabilizer. A rod which is fitted with two axially spaced-apart cam discs is provided in order to achieve not only a vibration-free stabilization but a simple sealing as well. Each cam disc has a spreading sleeve which engages over it. Once the spreading sleeve has been pressed against the inner wall of the tube by a relative rotation of the rod, the sleeve-shaped end of the rod is expanded by rolling or is welded in the tube sheet.

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Laudenbach, Germany

Wolfgang Kalthoff