MEASUREMENT DEVICE FOR INSIDE SURFACE PROFILE OF MOLTEN METAL VESSEL

PROBLEM TO BE SOLVED: To provide a device for measuring inside surface profile of a molten metal vessel wherein the inside surface profile of a molten metal vessel is measured easily and accurately. SOLUTION: After a lance 13 mounted on a running car 20 is moved and stood up in X and Y direction, respectively, the lance 13 is raised, and with a profile measurement head 12 attached to a tip end of the lance 13, an inside surface profile of a molten metal vessel 11 assigned above a floor surface 10 is measured. An operation where and axis line of the lance 13 is made agreed with a position for starting measurement, which is required when measurement is started, is easily done by projecting X, Y direction vertical light ray from an X, Y direction laser projection device 22 placed on the floor surface 10 around the molten metal vessel 11 to X, Y direction laser irradiation marks 23, 24, and 24a provided on the outside surfaces of the molten metal vessel 11 and the lance 13, for agreement.