Bar support shim and method

Details Bar support shim and method Bar support shim and method

1987-10-19

1989-10-17

Jones, Larry

Heat exchange

Casing or tank enclosed conduit assembly

With support in casing

165 69, 165 82, 165 76, F28D 700

Patent

active

048740411

ABSTRACT:
A nuclear steam generator having anti-vibration bars for limiting the motion of spaced heat exchanging tubes is provided with a shim located between every n.sup.th tube where n is greater than 1. The shims have a thickness equal to n times the dimensional difference (x-y) of the distance x between a pair of tubes and the width y of an anti-vibration bar between the tubes. The shim is of channel-shape and is put in position by cutting and removing the wrap-around bars from the outside of the tube bundle, inserting and expanding a bladder to spread the pair of tubes in the bundle on opposite sides of an anti-vibration bar, moving the anti-vibration bar between the pair of tubes to one side of the opening created by the bladder, inserting a shim of modular links between the anti-vibration bar and one tube of the pair of tubes and repeating the bladder inserting, expanding and anti-vibration bar moving steps to insert shims at intervals n along the bundle. Thereafter, a new wrap-around bar is welded to the ends of the anti-vibration bars on the outside of the tube bundle.

REFERENCES:
patent: 2905742 (1959-09-01), Woods
patent: 3292691 (1966-12-01), Welter et al.
patent: 4216824 (1980-08-01), Braun et al.
patent: 4735260 (1988-09-01), Wohrl et al.

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