| 摘要 |
A system for coiling tubes for use in coiled-tube heat exchangers and especially regenerators, in which the tube is fed through a roller arrangement adapted to bend the tube into the desired radius of curvature prior to the passage of the tube onto a coiling mandrel. The roller arrangement consists of a pair of rollers spaced apart in the direction of movement of the tube and held by a steel cable onto a carriage or traveler movable along a rail parallel to the axis of the tube, and a pair of rollers, between the first two rollers, embracing the major part of the periphery of the tube and formfitting therearound such that the rollers contact the tube at three points defining the curvature. The tube is thus bent into substantially its final curvature prior to its deposition upon the mandrel.
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