PACKAGE OF PLATES FOR TUBE-PLATE HEAT EXCHANGER WITH DIFFUSER-CONFUSER CHANNELS AND A ROTOR DIE FOR MAKING THE PLATES OF SAID PACKAGE.

摘要

PCT No. PCT/SU90/00047 Sec. 371 Date Dec. 13, 1991 Sec. 102(e) Date Dec. 13, 1991 PCT Filed Feb. 20, 1990 PCT Pub. No. WO91/13309 PCT Pub. Date Sep. 5, 1991.A stack comprises plates (1,2,3,4) having a zig-zag profile and defining diverging-converging passages in the flow direction (L) of the first heat-exchange medium. Each plate (1,2,3,4) has in the direction (M) perpendicular to the flow direction (M) of the first medium several rows (10) of equally spaced openings (11) accommodating tubes (11a) for a flow of the second heat-exchange medium. Each plate (1,2,3,4) has an odd number of portions (12,13) whose zig-zag profile is offset with respect to the zig-zag profile of the adjoining portion by one half of the pitch (t) of the zig-zag pattern of the profile. The rotary die set for producing the plates of this stack comprises two die rolls (19,20). The length of the evolution of the shaping surface (21,22) of each roll (19,20) is divided into an even number of portions of the same length. The zig-zag profile of each portion is offset with respect to the zig-zag profiles of the adjoining portions through one half of the pitch of the zig-zag pattern of the profile.