LIFTING AND TURNING DEVICE FOR FURNACE COVER, FURNACE INSTALLATION AND METHODS FOR LOADING AND MAINTENANCE OF SUCH FURNACE INSTALLATION

摘要

1. A lifting-and-rotating device (1) for a cover (11) of a furnace, in particular an electric arc furnace, comprising a guide body (2) with a base plate (2a), at least one rotatable roller (6, 6 ') sliding and vertical bore (2d), - the lifting trunnion (3), installed with the possibility of lifting and lowering inside the vertical hole (2d) in the guide body (2), - the lifting cylinder (4) for raising and lowering the lifting trunnion (3), which on the one hand is pivotally connected to the lifting pin (3), and on the other side is pivotally and pivotally connected to the base plate (2a), and is a guide frame (5) for supporting the cover (11), which has a support console (5a ), and the upper end of the support console (5a) is made with the possibility of connection with the cover (11) and, in addition, has a lifting protrusion (5b) with a lifting eye (5c), which can be engaged with the opposite lifting cylinder (4) the end of the lifting trunnion (3), wherein the support arm (5a) at its other end has at least one sliding plate (2b, 2b '), and the working surface of at least one roller (6, 6') sliding when lifting and lowering the lifting cylinder ( 4) is able to roll on at least one sliding plate (2b, 2b '). 2. Lifting and slewing device according to claim 1, wherein at least one slide roller (6, 6 ') is associated with an automatic lubricant supply system. The lift-and-rotate device according to claim 1 or 2, and it comprises a length-variable sealing means (7), which is fixed on one side on the guide body (2), and on the other side on the side facing the lifting protrusion�