METHOD OF PRODUCTION OF HEAT-EXCHANGING PIPES Russian patent published in 2005 - IPC

FIELD: heat engineering; production of methods and the equipment for production of finned pipes of cooling apparatuses or containers.

SUBSTANCE: the invention is intended for application in heat engineering, in particular, at production of finned pipes of cooling apparatuses or containers used for storage of spent fuel of nuclear reactors, and also other materials or objects being the powerful heat sources. The method of production of a heat-exchanging pipe provides for introduction of a core and ribs inside a tubular billet. At that on the internal surface of the tubular billet and on the external surface of the core there are preliminary made hollow longitudinal grooves. The ribs produced separately from the core are made in the form of a strip consisting of two layers, joint among themselves on edges in longitudinal direction or in the form of hollow pipes of oval cross-section, which before installation in the grooves are deformed creating inside excessive pressure, then insert them in the grooves and relieve the pressure. At that the pressure is chosen so, that the relative change of the maximal overall dimension of each rib in transversal direction is equal to: δ≥δ_min,

where δ is the value of the relative change of maximum overall dimensions of a rib in the transversal direction, δ_min - minimum value of a relative change of the maximum overall dimensions of the rib in the transversal direction, at which assembly of a pipe and creation of elastic deformations in the ribs are ensured. The invention ensures efficient heat sink cooling in large-sized pipes with their internal ribbing and simultaneous simplification of production.

EFFECT: the invention ensures efficient heat sink cooling in large-sized pipes with their internal ribbing and simultaneous simplification of production.

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