Patent GB-887792-A (GB)
Title: Improvements in or relating to conveyors for very heavy loads
Inventor: BOND HARRY LAURENCE FRED
IPC: B61J1/10
Filed: 1958-02-06
Abstract: 887,792. Transferring loads to and from vehicles by jacks. DAVY & UNITED ENGINEERING CO. Ltd. Feb. 5, 1959 [Feb. 6, 1958], No. 3968/58. Class 78 (4). [Also in Group XXXII] Relates to apparatus for conveying on rails 20, 26, a working vessel 1, Fig. 2, of a tilting rotating furnace or converter as described in Specification 887,791, either to a location where slag may be discharged or to a stand 30 where the vessel is relined. As shown, the apparatus includes two intersecting railway tracks 20, 26, each comprised of four rails, a wheeled carriage 21 on the track 20, a wheeled carriage 28 on the track 26 and a platform 23 provided with hydraulic lifting jacks and which is alternately carried on the carriages 21, 28. The arrangement is such that the vessel is lifted from between the side plates 6 of the converter and carried by the platform on the carriage 21 to the rail junction, whereafter the platform is supported on pillars 27 and the carriage 21 removed. The carriage 28 is then positioned under the platform which is lowered on to the carriage, the latter being thereafter moved to the supports 31, of the stand 30 on to which the vessel 1 is finally lowered. The carriage 28 together with the platform 23 thereon may then be driven back along the rails 26, beyond the rails 20 to a second relining stand (not shown) in which a further vessel 1, that has already been relined, is mounted. This further vessel is then carried to the junction, transferred to the carriage 21 and finally replaced between the converter side plates 6. Referring to Figs. 2 and 4 the underside of the square platform is provided at each corner with a jack 24 whilst the upper side is provided centrally on each side with a jack 25. In order to remove the vessel 1 from the converter, Fig. 3, a circular frame 11 is lowered over the conical mouth 10 and clamped thereto. The vessel and converter are then inserted as shown and the carriage 21 with the platform 23 are positioned thereunder. The jacks 25 are raised to engage the underside of the frame 11 and take the weight of the vessel 1. A box structure 9 of the converter is then removed by lifting and the carriage 21, platform and the vessel moved along the track 20. On reaching the track junction the jacks 24 are positioned over pillars 27 and are lowered to engage the latter whereby the platform is raised from the carriage which is moved out of the way. The carriage 28 is then positioned under the platform and the latter lowered thereonto. On reaching the supports 31 a peripheral track 2 on the vessel is spaced thereabove and by lowering the jacks 25 the weight of the vessel is taken on the tops of the supports 31, as shown in Fig. 6. The platform 23, Fig. 4, includes a pump 38, driven by a motor 39, and a sump 40 from which liquid is delivered under the control of valves 32, 34 through pipe networks to the jacks 24 or 25. In a modification the hydraulic jacks 24 are omitted from the platform 23 and stationary hydraulic jacks then replace the pillars 27. However, the platform may be provided with screw jacks in lieu of hydraulic jacks. Specification 887,793 also is referred to.