| 摘要 |
In shell and tube heat exchangers it is appropriate to fit a large number of heat exchanger tubes (6), e.g. glass tubes, between endplates (2), whereby these plates have to display a large number of holes (4) which each has an intermediate seat recess (18) for a sealing ring to abut the outer wall of the respective tube ends. The manufacture of these numerous seat recesses may present difficulties, but according to the invention they are formed in a simple manner by making each end plate a sandwich of three plates (8, 10, 12) which are readymade with ordinary holes, the holes (14) in the intermediate and thickest plate (8) are slightly larger than the holes (16) in the outer plates. When the plates are connected with the holes coaxially, the seat recesses (18) will be formed automatically. The sealing rings may be easily fitted by inserting them into the holes (14) of the intermediate plate before the last outer plate (12) is fitted to the intermediate plate (8). |
