Shaft furnace charging device equipped with a cooling system and annular swivel joint therefore

摘要

Annular swivel joint including an annular fixed part and an annular rotary part and having an annular trough that defines an annular volume, via which the circuits portions communicate,;a stationary forward connection for receiving cooling fluid from the stationary circuit portion; a rotary forward connection for supplying cooling fluid to the rotary circuit portion; a rotary return connection for receiving cooling fluid from the rotary circuit portion; and a stationary return connection for returning cooling fluid to the stationary circuit portion;;a partition dividing the annular volume into an annular external cavity and an annular internal cavity so that the forward connections are coupled via one of the external and internal cavities and the return connections are coupled via the other cavity, so that the internal cavity is at least partially surrounded by the external cavity.

主权项

1. Annular swivel joint for a cooling system of a metallurgical installation, said cooling system comprising a stationary circuit portion and a rotary circuit portion which is rotatable about an axis relative to said stationary circuit portion, said annular swivel joint being arranged coaxially on said axis and connecting said stationary circuit portion with said rotary circuit portion and comprising an annular fixed part which remains stationary with said stationary circuit portion and an annular rotary part which is rotatable together with said rotary circuit portion, said fixed part and said rotary part having mating configurations that allow relative rotation and including an annular trough that defines an annular volume, via which said circuit portions are in fluidal communication;
wherein said annular swivel joint comprises:
a stationary forward pipe for receiving cooling fluid from said stationary circuit portion; a rotary forward pipe for supplying cooling fluid to said rotary circuit portion; a rotary return pipe for receiving cooling fluid from said rotary circuit portion; and a stationary return pipe for returning cooling fluid to said stationary circuit portion;a partition dividing said annular volume into an annular external cavity and an annular internal cavity so that said forward pipes are coupled via one of said external and internal cavities and said return pipes are coupled via the other of said external and internal cavities, so that said internal cavity is at least partially surrounded by said external cavity, and with double leakage-permitting communication between said external and internal cavities through an annular first clearance and through an annular second clearance provided to allow relative rotation between said fixed and rotary parts; andan annular first flow restrictor provided in said first clearance and an annular second flow restrictor provided in said second clearance, said flow restrictors being configured to reduce leakage between said external and internal cavities,wherein said annular first clearance and said annular second clearance are generally mirror-symmetric with respect to a vertical axis and said annular first flow restrictor is a non-contact labyrinth seal arranged radially outward and said annular second flow restrictor is a non-contact labyrinth seal arranged radially inward.