Sliding nozzle device

摘要

A sliding nozzle device automatically performs a series of operations of loading and unloading pressure between plates and opening and closing a slide frame; maintaining the pressure without additional operations; and operates at full stroke during molten steel flow control. An auxiliary plate-exchanging mechanism includes slide axes moving in the same direction as a hydraulic cylinder operates, and an arm having a proximal end placed around the slide axis. The plate-exchanging mechanism is fixed on an upside frame. A first engagement pin mounted on the proximal end of the arm is inserted in a first engagement groove in a first engagement member engaging with the slide axis, and second engagement pins mounted on bearings are inserted in second engagement grooves in the slide axes. With movement of the slide axes the engagement pins respectively move in the engagement grooves, thereby rotating the slide axes and the arm.

主权项

1. A sliding nozzle device including:
an upside frame holding a fixed plate, the upside frame placed at a bottom of a molten metal container; a slide frame holding a sliding plate, the slide frame being openable relative to the upside frame; a sliding means for sliding the slide frame; and a spring box pressing the slide frame against the upside frame, the spring box rotatably fixed to the upside frame; the device comprising: an auxiliary plate-exchanging means interlocking with the sliding means, wherein the auxiliary plate-exchanging means is configured to unload the pressure on the slide frame by rotating the spring box while the sliding means operates in a first direction, wherein the auxiliary plate-exchanging means is configured to press the slide frame against the upside frame by rotating the spring box while the sliding means operates in a second direction opposite the first direction, wherein the auxiliary plate-exchanging means includes: a slide axle moving in the same direction as the sliding means; an engagement member engaging with the slide axle, the engagement member fixed on the upside frame; and an arm having a proximal end placed around the slide axle and a distal end connected to the spring box; wherein an engagement pin mounted on the proximal end of the arm is inserted into an engagement groove formed in the engagement member; and as the engagement pin moves in the engagement groove according to movement of the slide axle, the arm rotates around the slide axle, and the spring box connected with the arm rotates in an opening or closing direction of the spring box.