| 摘要 |
<p>1498736 Making electrode screw joints LECTROMELT CORP and AVRR 22 Sept 1975 [23 Sept 1974] 38799/75 Heading B3N [Also in Division H5] A device for screwing a new electrode section 41 on to an electrode section (21, Fig. 1, not shown) in an arc furnace (10) comprises a continuous flexible band 66, openable and closable at a pin (67) to encircle the electrode section 41, driven by an air, hydraulic or electric motor (74) via a speed reducer (72) and sprocket 71, guided by idler wheels 69, 70, 83, and tensioned by means acting on one, 83, of the idler wheels. The device includes a base plate 65 on an arm 57 longitudinally movable by rack and pinion 60, 61 and rotationally movable via a pedestal (53) in a socket (52). Rollers 85, 86 rest on the electrode section to resist lateral movement due to the pull of the device. From one socket the device may couple sections to all three electrodes 20-22 of the furnace. The device may be lifted as a whole for use in corresponding sockets adjacent other furnaces in the plant. To add the new electrode section, arm assembly (25) holding the old electrode section (21) is lowered until the section rests on the melt or flow of the furnace. Clamping shoe (34) is slackened to permit the arm assembly to be raised to near the top of the old section (21) when it is re-tightened to prevent rotation of the section. The new section 41 is brought with its connector (e.g. metal or carbon ripple or an extension of the electrode section into alignment with the old section. The band is unpinned, passed around the new section, repinned and the position of the coupling device adjusted so that the new section rests against rollers 85, 86 in alignment with the old section. Motor 74 drives the band to screw in the new section until the motor stalls or the band slips. The furnace is emptied via spout (13) by rocking on rockers (19) that run in a toothed rack.</p> |
