DIPPED NOZZLE SUPPORTING-REPLACING MECHANISM, AND LOWER-NOZZLE/DIPPED-NOZZLE SEALING METHOD

摘要

Disclosed are a dipped nozzle supporting-replacing mechanism and a lower-nozzle/dipped-nozzle sealing method, for relaxing a bending stress to be applied to a lower nozzle, by joining the ring-shaped taper portion of the lower nozzle to the receiving taper portion of a receiving member, thereby to prevent the occurrence of a vertical cracking, and for improving the sealing properties of the lower nozzle and a dipped nozzle with a seal member. The dipped nozzle supporting-replacing mechanism and the lower-nozzle/dipped-nozzle sealing method are constituted to suppress the vertical cracking by joining the receiving taper portion (3A) of the receiving member (3) to the ring-shaped taper portion (4A) of the lower nozzle (4), when the upper face of the dipped nozzle (6) is joined by a clamper (5) to the lower face of the lower nozzle (4) supported by the receiving member (3) of the lower frame (2) of a slide valve device (1).