Patent ID: 9657994
Date: 2017-05-23
CPC Classifications: F27B,F27D

Claim:
1. An arc furnace comprising: a furnace vessel for melting steel, a cover for closing the furnace vessel, the cover including a connection element, a swivel unit by means of which the cover is moved away from the furnace vessel, the swivel unit including a holder, a cradle configured to move in the vertical direction below and above an engagement position to selectively fix and release the cover from the swivel unit, struts arranged on the cradle to move vertically with the cradle, the struts supporting the cover when the cover is operated to close the furnace vessel and disengage from the cover after the cover is releasably fixed to the swivel unit wherein: a) the furnace vessel is mounted to be movable in a vertical direction relative to the swivel unit, and b) the holder and the connection element engage to fix the cover to the swivel unit when the cradle is moved in a vertical direction below the engagement position, and the holder and the connection element disengage to release the cover from the swivel unit when the cradle is moved in the vertical direction above the engagement position, wherein the furnace vessel is mounted in the cradle.