Sealing assembly for furnace probe bore

An attachment for a bore in a shaft wall of a blast furnace through which an elongate blast furnace probe is operatively received by longitudinal movement of said probe through said attachment and bore into and out of said furnace, said attachment comprising, in combination, stop valve means for effecting a fluid seal when said probe is moved through said attachment, a hose seal comprising a toroidal hose member surrounding said probe and including an inner circumference pressed in direct contact against said probe during movement of said probe inwardly and outwardly of said furnace, said hose seal including fluid pressure means for applying a fluid pressure urging said hose member into sealing contact against said probe and an additional sealing assembly arranged adjacent said hose seal longitudinally of said probe for providing an additional sealing function between the outer surface of said probe and said attachment.

An attachment for a bore in the shaft wall of a blast furnace through which a blast furnace probe is received comprising, stop valve means, a sealing assembly, and a hose seal which bears against said blast furnace probe and which is connected to said sealing assembly wherein said stop valve means includes a stop valve member and an annular piston arranged within said stop valve means on a side of said stop valve member nearest said furnace, with sealing rings being provided on a head of said annular piston between said annular piston and said stop valve member and wherein annular chambers leading to lubricant bores are provided between said sealing rings for said stop valve member.