TOP CAP LIFTING AND GUIDING DEVICE FOR VACUUM LADLE REFINING FURNACE

摘要

PURPOSE:To prevent the airtight leakage by the defective contact between the bottom end line of an upper cap which rises in a cap closing position and a sealing member of a tank body by constituting the upper cap liable to receive uneven load in such a manner that the cap can be lifted without rolling with the tank body. CONSTITUTION:Rods 19, 19' extend when hydraulic cylinders 18, 18' are synchronously operated in the cap closing position. The upper cap 2 is then lowered in a horizontal state by means of chains 10, 10', 11, 11'. The bottom edge of the cap contacts the O-ring G of the tank body 1 in the lower position, thus attaining the cap closing position. On the other hand, the hydraulic cylinders 18, 18' are simultaneously operated in the reverse direction to retract the rods 19, 19' in the cap opening position. The rods 19, 19' are then retracted and the upper cap 2 is raised by the chains 10, 10', 11, 11' in the horizontal state to attain the cap opening position again. Guide pipes 40, 40' of the upper cap 2 are guided by guide cylinders 48, 48' provided to hanging stands 13, 13' and therefore, the rolling of the cap 2 with the tank body 1 is obviated.