DIPPING TYPE LEVEL GAUGE FOR HIGH TEMPERATURE MOLTEN METAL, DIPPING TYPE TEMPERATURE MEASURING APPARATUS WITH LEVEL MEASURING FUNCTION FOR HIGH TEMPERATURE MOLTEN METAL AND SURVEILLANCE PROBE WITH LEVEL MEASURING FUNCTION

摘要

PURPOSE:To directly measure the level of a high temperature molten metal at real time by applying an alternating current voltage to a primary coil, and measuring the level based on the induced electromotive force generated in a secondary coil. CONSTITUTION:An induction-type level gauge 27 is constituted of a primary coil 29 to which an alternating current voltage is applied by an oscillator 31 via a conductor 32, and a secondary coil 30 which generates an induced electromotive force E through the electromagnetic coupling in the periphery thereof in accordance with the excitation of the primary coil 29 when dipped in a molten steel 2. The induced electromotive force E of the secondary coil 30 is guided to a voltmeter 33 via a conductor 34 and measured as the level of the molten steel 2 by the voltmeter 33. The dipping depth of a holder can be directly known by the induction-type level gauge 27, not by eyes or estimation, etc. Sampling for measuring the temperature of the molten steel 2 in a pot 1 which accompanies the change of the level is always performed as the sensor holder 22 is dipped in a predetermined depth. Therefore, the representative temperature and component can be secured and the safe measurement is ensured.