PURPOSE: To accurately and automatically measure the deforming rate of a sliding nozzle(SN) plate arranged for fitting the sliding nozzle device at the bottom part of a ladle charging molten steel.
CONSTITUTION: Legs 7 having the same length are arranged at four corners of a frame 1, and the frame 1 is fitted in parallel with the sliding nozzle plate 3 in the fixed interval by pushing each leg 2 till bumping against the sliding nozzle plate 3 through a cassette guide for fitting the sliding nozzle projected from the sliding nozzle plate 3. In the frame 1, guides 7 controlled in the X and Y directions with a control device so as to be shiftable to the X and Y directions with a rail 5 in the Y direction and a rail 6 in the X direction are arranged, and in the guides 7, an optical sensor 9 is fitted to measure the interval with the sliding nozzle plate. In the frame 1, a heat-proof plate 13 providing measuring holes 14 in each fixed interval and the optical sensor 9 is protected from high temp.
HONDA TSUTOMU
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