Sliding nozzle device

Abstract

The present invention provides a sliding nozzle device having sliding metal frame holding parts provided on both of the long sides of a fixed metal frame so as to be openable and closeable, wherein the sliding metal frame holding parts on both sides can be simultaneously opened / closed with a simple operation. In this sliding nozzle device, shafts 5a, 5b of the sliding metal frame holding parts 4a,4b are rotatably held, respectively, on both of the long sides of a fixed metal frame 2, end sections of the shafts of the sliding metal frame holding parts on both sides are respectively provided with a first link part 7a and a second link part 7b, wherein the first link part and the second link part are connected with a linking means 10 so that opening / closing one of the sliding metal frame holding parts causes the shaft of the other sliding metal frame holding part to rotate in reverse, thereby also opening / closing the other sliding metal frame holding part.

Description

technical field [0001] The present invention relates to a sliding nozzle device used for controlling the flow rate of molten metal, and more particularly to a sliding nozzle device provided with openable and closable sliding metal frame holding parts on both sides of the long side of a fixed metal frame. Background technique [0002] The sliding nozzle device is installed, for example, at the molten steel discharge port of the ladle, and the lower plate is linearly aligned with the upper plate by overlapping two upper and lower refractory plates with nozzle holes and applying surface pressure. Slide to change the opening of the nozzle hole to control the flow of molten steel (molten metal). [0003] Such a sliding nozzle device usually has: a fixed metal frame, which holds the upper plate; a sliding metal frame, which holds the lower plate, and linearly slides the lower plate relative to the upper plate; a sliding metal frame holding part, which slidably holds the sliding no...

AI Technical Summary

Problems solved by technology

[0006] However, when the plate is replaced, when the sliding nozzle device is placed horizontally and the two sliding metal frame holding parts are positioned up and down, when the two sliding metal frame holding parts are opened, it is necessary to open against its own weight (gravity). The sliding metal frame holding part on the upper side becomes a burden on the operator, and even if it is opened, it will rotate due to its own weight and return

In addition, since the lower sliding metal frame holding part rotates due to its own weight, it is dangerous to open at will, and since it needs to be closed against its own weight when closing, it becomes a burden on the operator, and there is also a risk of opening due to its own weight. Problems leading to recovery

Then, there is a problem that in order to avoid the rotation of the sliding metal frame holding part due to its own weight, it must be fixed with a hook or the like, resulting in a problem of increased workload.

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