SLIDING NOZZLE DEVICE

摘要

A sliding nozzle device that can reduce any damage such as surface roughness and chipping in a nozzle hole surroundings of a used plate. The sliding nozzle device includes a fixed metal frame, a sliding metal frame, and an opening and closing metal frame that holds the sliding metal frame in a slidable manner, and in the sliding nozzle device in which sliding contact surfaces of the sliding members provided on the sliding metal frame and the opening and closing metal frame come in slidable contact with each other, the sliding contact surfaces of the sliding member of the sliding metal frame are provided away from each other by a predetermined length front and rear in the sliding direction and a part between the front and rear sliding contact surfaces serves as a depressed part, and the sliding contact surfaces of the sliding member of the opening and closing metal frame are provided away from each other by a predetermined length front and rear in the sliding direction and a part between the front and rear sliding contact surfaces serves as a depressed part.

主权项

1. A sliding nozzle device comprising: a fixed metal frame for holding an upper plate that has a nozzle hole; a sliding metal frame for holding a lower plate that has a nozzle hole of identical diameter as the nozzle hole of the upper plate, configured to linearly slide to move the lower plate in a sliding manner with respect to the upper plate; an elastic body for loading surface pressure between the upper plate and the lower plate; an opening and closing metal frame attached to the fixed metal frame, for holding the sliding metal frame in a slidable manner; and a driving device of the sliding metal frame, the sliding metal frame and the opening and closing metal frame each having a sliding member disposed symmetrical about a sliding direction center line of the sliding metal frame and parallel to a sliding direction, and the sliding members coming in contact with each other on their sliding contact surfaces in a sliding manner, wherein the sliding contact surfaces of the sliding member of the opening and closing metal frame is provided front and rear along the sliding direction, away from each other by a length of a nozzle hole diameter or more from a plane serving as a center, the plane passing through a center axis of the nozzle hole of the upper plate and being perpendicular to the sliding direction, and a part between the front and rear sliding contact surfaces serves as a depressed part.