Device for cooling metal strips or sheets

A device for cooling metal strips or sheets conveyed on a conveyor line comprising:

• cooling beams arranged opposite from each other on a respective upper and lower side of a metal strip or sheet that is to be cooled, and extending across a width of the conveyor line, wherein the cooling beams respectively have, on a front face, a connection point to which a supply tube for cooling liquid is connected;
• a plurality of pyrometers is configured to measure temperatures of the metal strip or sheet at a plurality of locations;
• and
• a plurality of discharge openings provided along a longitudinal axis of the cooling beam, wherein the cooling liquid is discharged through the discharge openings in a direction of the metal strip or sheet that is to be cooled, individual discharge openings of the plurality of discharge openings are respectively formed as tubes arranged on an enclosure of the cooling beam, a specific amount of the cooling liquid discharged through the plurality of discharge openings of the cooling beam arranged on the upper side of the metal strip or sheet that is to be cooled onto the upper side of the metal strip or sheet is between 100 and 200 m3/(m2*h), a specific amount of the cooling liquid discharged through the discharge openings of the cooling beam arranged on the lower side of the metal strip or sheet that is to be cooled onto the lower side of the metal strip or the metal sheet is between 100 and 200 m3/(m2*h);
• and
• the individual discharge openings have a respective adjusted flow area associated with them, and with it a respective aperture, arranged in an inlet region of associated discharge openings, a flow area of a discharge opening and the associated aperture adjacent to a front face of the cooling beam positioned distal from the connection point is smaller than a flow area of a discharge opening and the associated aperture positioned proximate to the connection point, and the flow areas of the associated apertures are selected such that a distribution of the cooling liquid across the width of the conveyor line is parabolic.