METHOD FOR PREVENTING OPENING OF TROUGH IRON SHELL AND OPENING-PREVENTIVE TOOL THEREFOR

摘要

PROBLEM TO BE SOLVED: To prevent the crack on the end surface of a standing-up part of a large trough or the crack on the end surface of the tip part of a trough for molten iron with a simple method without renewing an iron shell.;SOLUTION: In the standing-up part of the large trough or the tip part of the tough for molten iron, the upper part of the iron shell 2 is fixed with a bar 8 so as to bridge at the right angle to the flowing direction of the molten iron. Therefor, an opening-preventive tool 1 for trough iron shell, composed of; a hinge part 7 arranged at the upper part of the iron shell 2; the bar 8 arranged so as to be rotatable at a base end part in the hinge part 7; and a receiving part 9 for fixing the tip end part of the bar 8 so as to be freely fitted/removed, is used. Further, penetrating holes are arranged at the tip end part of the bar 8 and the receiving part 9 and the penetrating hole arranged at the tip end part of the bar 8 is the same as or shorter in the length along the longitudinal direction of the bar 8 than the penetrating hole arranged at the receiving part 9, and under state of positioning the tip end part of the bar 8 to the receiving part 9, the inside end part of the penetrating hole arranged at the tip end part of the bar 8 is made to position to the base end part side of the bar 8 from the inside end part of the penetrating hole of the bar arranged at the receiving part 9. Then, the tip end part of the bar 8 is made to be freely fitted/removed to the receiving part 9 by fitting/removing cotters 14 in these penetrating holes.;COPYRIGHT: (C)2006,JPO&NCIPI