| 摘要 |
PURPOSE:To decrease thermal stress produced in a tube-plate supporting member to be accompanied with the change in temperature of fluid flowing in a heat transfer tube, keeping air-tightness properties between the primary and the secondary fluids, by dividing a tube plate and the tube-plate supporting member into two parts to make a two-bodied structure in order to allow each body relative displacement. CONSTITUTION:An inner structure provided with an upper tube plate 1, having a rim in the shape of a truncated cone on its outer periphery, is inserted into a supporting skirt 5 having a receiver in the shape of a truncated cone, and the primary and the secondary fluids are completely separated from each other, allowing the tube plate and its supporting member relative displacement by providing bellows 6 between them. Thermal stress produced in the tube-plate supporting member is decreased by separating these two parts from each other and by allowing them to perform relative displacement. Leakage of the primary and the secondary fluids is prevented by providing the bellows 6 between the supporting skirt and the outer periphery outside the tube train. An eccentric movement of the inner structure from an outer shell is prevented by conically forming the contacting surface of the supporting skirt 5 with the tube plate 1. |
