Safety device for detecting electrode breakage

H - Electricity – 05 – B

Patent

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Details

H05B 7/12 (2006.01) H05B 7/10 (2006.01)

Patent

CA 2590809

The invention relates to a safety device (1) for detecting electrode breakage in an electric arc furnace, in which the electrode (6) is fixed to an electrode support arm (4). If electrode breakage occurs, the pressure in a conduit, which is filled with a medium at a constant pressure, drops and said drop is registered as an alarm signal. The conduit (7a-d, 3) is integrated into a protective component (2, 3), which is mounted on the underside of the electrode support arm (4). If electrode breakage occurs, the conduit (7a-d, 3) is damaged by the resultant arc, producing a drop in pressure.

L'invention concerne un dispositif de sécurité (1) servant à détecter une rupture d'électrode dans un four à arc électrique dans lequel une électrode (6) est fixée sur un bras de support d'électrode (4). En cas de rupture d'électrode, une chute de pression se produit dans une conduite remplie d'une substance soumise à une pression constante, et cette chute de pression est détectée en tant que signal d'avertissement. La conduite (7a-d, 3) est intégrée dans un composant de protection (2, 3) qui est monté sur la face inférieure du bras de support d'électrode (4). En cas de rupture d'électrode par l'arc électrique généré, la conduite (7a-d, 3) est endommagée, ce qui entraîne une chute de pression.

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