| 摘要 |
PURPOSE:To reduce the weight of a casting, to eliminate machining or the like of a contact face and to use only a pattern of one-half the size by forming a space between both end surface flanges of the casing into a symmetrical shape on the boundary of a centerline along a direction intercrossing the direction of a flowpath, in the center of a casing and providing collective pipe covers communicating with respective heat transfer pipes on the outer surfaces of both end walls of the casing. CONSTITUTION:On the boundary of a centerline along a direction intercrossing the direction of a flowpath, in the center of a casing 14, a space between both end surface flanges is formed into a line symmetrical shape (l1=l2). At the central portion of the casing, a horse's hoof shaped heat exchange chamber 17 is formed so that the heat exchange chamber 17 surrounds a drain flowpath. An arcuate mounting plate 21 clogging arcuate holes 20 are fastened by bolts to the outer surfaces of both end walls 19 and 19 of the casing 14, and both ends of each heat transfer pipe 18 are inserted into a large number of through holes formed on each mounting plate 21. Collective pipe covers 24 of a semicircular section communicating with respective mounting plates 18 are fastened by bolts to respective mounting plates 21, and the interior of the collective pipe covers 24 are partitioned by partition plates at a suitable interval, collecting covers 24 being communicated with each other by communicating pipes 27 to form a series of zigzag-shaped heat transfer flowpaths.
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