| 摘要 |
<p>PCT No. PCT/FR84/00095 Sec. 371 Date Dec. 7, 1984 Sec. 102(e) Date Dec. 7, 1984 PCT Filed Apr. 6, 1984 PCT Pub. No. WO84/04017 PCT Pub. Date Oct. 11, 1984.The present invention relates to a machine for replacing the electrodes of electric arc furnaces. Machine characterized in that the sheath (3) is provided, between its gripping chucks, with a centering chuck (7), in that the upper chuck (4) is provided with an expansible support (8) limiting its opening, and with pinions (9) for driving the gripping spiral of the retractable jaws (10), and in that the device (6) for driving in rotation the sheath (3), is constituted by a screw (11)-nut (12) assembly for the translatory movement of the sheath (3), by motors (13) for final screwing of the electrode, and by a device (14) for driving in rotation and braking the sheath (3), the assembly of the control elements being actuated pneumatically.</p> |
