DEVICE FOR INDUSTRIAL ROLLING ON THE INNER SURFACE OF THE CARRYING TUBE OF SCREWED Smoothly-cut protrusions in the bimetallic ribbed pipe

Main characteristics / technical and economic advantages: The device makes it possible to implement the method of flow turbulization using internal protrusions on a supporting pipe with an outer diameter of 25 mm and a wall thickness of 2.0-2.5 mm, while grooves are formed on the outer surface of the pipe, which intensify contact heat transfer … The rolling speed of the protrusions is of the order of 1.5-3.0 m / min, for which rollers are used on three rolls located in a circle with an angle of 120 ° relative to each other. As a result, the heat flow of the apparatus increases by 7-15% with the dimensions and power of the fan unchanged, the reliability of the mechanical connection of the ribbed shell with the supporting pipe increases, which makes it possible to use such pipes at wall heating temperatures up to 350-380 ° C.

Application of the development – obtaining turbulators of an energy carrier moving inside heat-exchange bimetal tubes with spiral aluminum fins, streamlined outside by a forced transverse flow of ambient air.