Patent ID: 8047838
Filing Date: 2011-11-01
Classification: F27D

Abstract:
1. Roller, used in particular in continuous furnaces for reheating long products, for handling and conveying iron and steel products, particularly slabs, comprising a cooled central shaft on which are mounted a plurality of discs serving to support the products to be conveyed, positioned perpendicularly to the longitudinal geometrical axis of the roller, spaced apart along the axis of the roller and separated by insulating sleeves, wherein the insulating sleeve is retained at each longitudinal end by at least one cold part fixed to the shaft and cooled by the shaft, with an axial clearance between the sleeve and the cold part, wherein the cold part consists of at least two stops locked with respect to rotation and translation on the central shaft, and a radial clearance between the sleeve and the shaft, such that any deflection of the shaft can occur during operation without causing any substantial mechanical stress on the insulating sleeve, and the heat transfer from the sleeve to the shaft, and from the discs to the sleeve, is limited; and wherein the axial clearance and the radial clearance are respectively greater than two millimeters.