Device for inserting a lance into a pressurized container, in pa

Details Device for inserting a lance into a pressurized container, in pa Device for inserting a lance into a pressurized container, in pa

1994-05-26

1996-01-30

Andrews, Melvyn

Metallurgical apparatus

Means sealing or opening aperture in vessel

266225, 266 47, C21C 548

Patent

active

054875323

ABSTRACT:
A device is presented which equips an opening made in a pressurized container, in particular a blast furnace, for the axial insertion of a lance. This device comprises an axial sealing member, a casing, a first fixed seat, a second axially movable seat and a closure element. The closure element is fitted with a separation spring which produces an axial clearance with respect to the first seat. Closure springs apply the second seat onto the closure element and the closure element onto the first seat. Active opening members, for examples jacks, act against the closure springs. In a preferred embodiment, the device further comprises a spacer element which is identical to the closure element except that it is provided with a through opening for the lance.

REFERENCES:
patent: 3643508 (1972-02-01), Schneider
patent: 4471664 (1984-09-01), Mailliet et al.
patent: 4997475 (1991-03-01), Feuillerat et al.

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