| 摘要 |
<p>PURPOSE:To repair a damaged tube easily and quickly by a method wherein a tapered sleeve is inserted into a damaged part in the locally damaged tube and both ends thereof are expanded to adhere the outer peripheral surfaces of both ends of the sleeve to the wall of the damaged tube with a pressure. CONSTITUTION:Upon repairing the damaged heat transmitting tube 11 of a heat exchanger, an expanding member 15 is inserted beforehand into the thinner part of the sleeve 13, the tip end screw part of a tension bar 17 is screwed into the center hole of the expanding member 15 and said tension bar 17 is pulled from the outside of the tube toward the thicker side of the sleeve 13 by a proper driving means such as a jack or the like, for example, to pull the expander 15 out of the sleeve 13. In this case, the tapered surface of the inner peripheral surface of the sleeve 13 is expanded forcibly by the tapered surface of the expanding member 15 and, whereby, the sealing between the outer peripheral surface of the sleeve 13 and the inner peripheral surface of the damaged tube 11 may be secured. On the other hand, lubricating oil in a groove 16 for the lubrication of the outer peripheral surface of the expanding member 15 serves to reduce a friction between the outer peripheral surface of the expanding member 15 and the inner peripheral surface of the sleeve 13.</p> |
