ARRANGEMENT OF HEAT EXCHANGE PIPE WITH INTERNAL FINNING Russian patent published in 2013 - IPC F28D7/10 F28F1/42 

FIELD: heating.

SUBSTANCE: in a heat exchange pipe that includes a tubular workpiece, on the inner surface of which longitudinal slots are made and on the outer surface of which a hollow core with longitudinal slots is made, fins are inserted on one side into slots of the tubular workpiece, and on the other side into the core slots. Tubular workpiece is oriented relative to the core so that their longitudinal slots can be offset relative to each other through the specified angle α. Fins are made in the form of flat parts; each fin consists of two straight-line components, one of which has a longitudinal pointed end section in the interface zone with the second component provided with a mating wedge-shaped part. Low-melting inserts are arranged in slots of the tubular workpiece and the core. Fin component with the mating wedge-shaped part consists of two symmetrical longitudinal parts. Angle of taper of the longitudinal end section of one fin component is less than aperture angle of the wedge-shaped slot of the second fin component.

EFFECT: increasing safety of the device under conditions of increased temperatures or a fire; reducing manufacturing working hours.

4 cl, 2 dwg