DEVICE FOR CONTROLLED COOLING OF ROLLED PRODUCTS Russian patent published in 2022 - IPC B21B45/02 C21D1/667 

FIELD: rolling production.

SUBSTANCE: invention relates to rolling production, in particular, to the design of lines for water cooling bar and sheet mills. Device for controlled cooling of rolled products contains a section consisting of at least two hollow cooling rollers with radially arranged nozzles for coolant supply. The nozzles are slotted along the generatrix of the roller barrel, the nozzle length is: L=0.8÷0.95L₁, where L is the nozzle length, m; L₁ - roller barrel length; the nozzle width is chosen equal to: A=0.2÷0.4S, where A is the nozzle width, m; S is the wall thickness of the roller barrel. The section of the cooling rollers is equipped with an electric drive, while the lower part of each cooling roller is placed in a flow restrictor, consisting of a section curved in the shape of the cooling roller, which surrounds the roller by no more than 180°, and two straight sections, the height of each of which is determined in such a way, so that the angle α of the inclination of the beam emerging from the center of the axis of rotation of the cooling roller and passing through the extreme upper point of the straight section of the flow restrictor, to the horizontal plane of the roller, was 15-25°. A screen is installed above the section with cooling rollers, the distance from the axis of rotation of the roller to the inner surface of the screen is chosen equal to: H=2÷4D, where H is the distance from the axis of rotation of the roller to the inner surface of the screen; D is the outer diameter of the roller, and the coolant flow rate supplied to each cooling roller is determined from the condition: , where Q is the coolant flow rate, m³/s; A - nozzle width, m; L - nozzle length, m; R - outer radius of the roller, m; k=2.5÷7.5 - correction factor; g - free fall acceleration, m/s².

EFFECT: improving the mechanical properties of finished rolled products by increasing the efficiency of the cooling process of rolled products, as well as reducing surface defects by lifting rolled products through a coolant supplied through nozzles under pressure.

1 cl, 5 dwg, 1 tbl