Method of inserting a sleeve within a heat exchanger tube

Details Method of inserting a sleeve within a heat exchanger tube Method of inserting a sleeve within a heat exchanger tube

1984-02-10

1987-08-11

Crane, Daniel C.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291573R, 29727, 72160, B21D 5306

Patent

active

046851860

ABSTRACT:
The simultaneous straightening and insertion of tubular sleeves into damaged heat exchanger tubes is accomplished by passing a pre-bent tubular sleeve through a bending apparatus utilizing three forming rolls. One of the forming rolls can selectively be moved toward the other two to compensate for varying radii of curvature. The apparatus is equipped with a pneumatic or hydraulic cylinder capable of pulling the tubular sleeve through the bending apparatus in incremental steps. By simultaneously straightening and inserting pre-bent tubular sleeves into damaged heat exchanger tubes, the tubular sleeves can be inserted into damaged tubes which are in positions which would otherwise be impossible to be repaired by this method. This method effectively circumvents the proscription of straight tube insertions into damaged heat exchanger tubes from the quarter spherical chamber of the heat exchanger.

REFERENCES:
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patent: 962831 (1910-06-01), Haga
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patent: 4104790 (1978-08-01), Hindrichs
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patent: 4313793 (1982-02-01), Klumb et al.
patent: 4329769 (1982-05-01), Glatthorn
patent: 4334418 (1982-06-01), Grandell

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