CARBON ELECTRODE LENGTH MEASURING DEVICE AND MEASURING METHOD FOR ELECTRICAL RESISTANCE TYPE MELTING FURNACE, TAPER UNION EMPLOYED IN SAID MEASURING DEVICE, AND METHOD FOR CONNECTING TAPER UNION AND METAL PIPE

WIPO Patent Application WO/2023/223683

A1

The objective of the present invention is to accurately measure the length of a carbon electrode by eliminating measuring errors resulting from an external shape of a union that has melted off together with a metal pipe. This carbon electrode length measuring device comprises one metal pipe group which is inserted through at least one carbon electrode and which is configured to reach a lower end of the carbon electrode by joining together a plurality of metal pipes using a taper union having an outer shape in which two tapered surfaces are formed extending continuously from two ends of a central part having a maximum diameter, and a microwave transmitting and receiving device mounted on an upper end of the metal pipe group, wherein: microwaves are transmitted from the transmitting and receiving device; the microwaves propagate through a propagation pathway comprising a cavity and the metal pipe group other than the cavity, the cavity being formed in a lower end portion of the carbon electrode as a result of melting off of the metal pipe or the taper union, or both the metal pipe and the taper union; and microwaves reflected by a molten liquid surface of a material that is being melted are received to obtain the length of the carbon electrode.

KAYANO HAYAE (JP)
MATSUMOTO KOICHI (JP)

PCT/JP2023/013032

November 23, 2023

March 29, 2023

Click for automatic bibliography generation  

WADECO CO LTD (JP)

F27B3/28; F27B3/08; F27D21/00; G01N22/00

WO2014002192A1

2014-01-03

JP2013535003A	2013-09-09
JPH0894060A	1996-04-12

EIKOH, P.C. (JP)

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