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For reinforcing the connection between the tubes of a heat exchanger and the tube end plate in which they are engaged, the tube end plate is formed by punching for delimiting collars having a bevelled end and forming bulged bottoms between the collars, then a small plane plate is applied on the bulg

For reinforcing the connection between the tubes of a heat exchanger and the tube end plate in which they are engaged, the tube end plate is formed by punching for delimiting collars having a bevelled end and forming bulged bottoms between the collars, then a small plane plate is applied on the bulged bottoms, the small plane plate being brazed in the same time as the tubes and the tube end plate.

대표청구항 ▼

A method for reinforcing by means of small plates at least end rows of tubes engaged into tube end plates for constituting a heat exchanger, characterized by the steps of: forming the tube end plate by punching in order (1) to delimit collars in the tube end plate with said collars having an irregul

A method for reinforcing by means of small plates at least end rows of tubes engaged into tube end plates for constituting a heat exchanger, characterized by the steps of: forming the tube end plate by punching in order (1) to delimit collars in the tube end plate with said collars having an irregular bevelled end, and (2) to bulge bottom of the parts separating two successive tube passages in the tube end plate so as to form bulged parts, applying an apertured small planar plate on said bulged parts, said small planar plate having apertures corresponding to the tubes, said applied plate and said bulged parts thereby forming a unit; fluxing the formed unit with a flux; and brazing the fluxed unit with a brazing alloy, intervals between the bulged parts of the tube end plate and planar parts of the small planar plate forming capillary flowing circuits for the brazing alloy, thereby washing off the flux from said intervals.