device for mechanical descaling of hot rolled metal strip

摘要

PURPOSE:To provide optimum scaling depending on width and material of a strip by positioning a rotational center of an injection device on an extention line which is perpendicular to the strip and passes a point where fluid hits the strip. CONSTITUTION:A rotational center of an injection device is positioned on an extention line which is perpendicular to a strip S and passes a point where a fluid hits the strip. In order to adjust injection angles beta a screw shaft 28 being driven by an electric motor is displaced back and forth, rotating links 14 and 15 around their centers 12 and 13; these two links are components of a parallelogram link which consists of links 14, 15, 20, and 21. The crossing point of both an axial line l6 of a nozzle element 35 and the surface of the strip S does not change, thus optimum scaling is obtained. Change in injection distances is provided through rotation of a screw shaft which shifts a block 34. When width of the strip S is relatively narrow, a supporter elements 5 is swung with its center at X in order to erect the nozzle equipment against the strip S.