JPH0224509Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tundish for a continuous casting apparatus.

[Prior Art] For example, in a continuous track type continuous casting device, molten metal is placed in a tundish, and the molten metal is injected into the casting device main body from a discharge nozzle formed at the bottom of the side wall of the tundish for casting.

In such a continuous casting apparatus using a tundish, if any failure occurs in the casting apparatus body after the nozzle, the injection of molten metal must be stopped immediately and the molten metal must be extracted from the tundish. This is because if molten metal remains in the tundish, it will solidify and damage the tundish.

Conventionally, in preparation for such an abnormal situation, an outlet with a plug for draining the molten metal is simply provided on the bottom wall of the tundish, and in an emergency, the plug is removed to open the hole and drain the molten metal.

[Problems to be solved by the invention] However, in the conventional tundish, even if the outlet is opened and the molten metal is drawn out from there, the discharge nozzle remains open, so there is still no flow from there into the casting equipment body. There was a problem with molten metal flowing in.

The object of the present invention is to provide a tundish with an extremely simple structure that can simultaneously close a molten metal discharge port and open an emergency extraction port.

[Means for Solving the Problems] The present invention solves the above-mentioned problems by providing a molten metal outlet at the bottom of the side wall, and providing a molten metal outlet near the bottom wall in case of an emergency. The present invention is characterized in that an ejection port is provided, and a plug member is fitted in the ejection port to close the ejection port and open the ejection port when pushed upward.

[Function] In the above-mentioned tundish, in an emergency, by pushing up the plug member strongly by some means, the molten metal discharge port is closed by the plug member, and the extraction port is opened. Then, the molten metal in the tandate is
The injection into the main body of the casting equipment is stopped, and it is immediately extracted outside.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

This tundish is capable of storing molten metal P in a space surrounded by a side wall 1 and a bottom wall 2, and a molten metal discharge nozzle 3 is formed at the bottom of the side wall 1. Further, the discharge nozzle 3 of the bottom wall 2
An extraction port 4 is formed near the opening 4 for extracting the molten metal P inside in case of an emergency. A gutter 5 that is continuous with the bottom wall 2 and forms an oblique extraction passage is provided below the extraction port 4, and the molten metal P extracted from the extraction port 4 is directed away from the casting device (not shown). (left side in the figure).

Further, a plug member 6 is fitted in the extraction port 4. This plug member 6 has an inverted L shape consisting of a top portion 6a and a front wall portion 6b along the nozzle side wall surface 5a inside the gutter 5.
It is shaped like a letter, and there is a gap between its front wall 6b and the wall 5b on the opposite side from the nozzle 3 inside the gutter 5,
It is designed to be able to slide diagonally up and down. When descending, the top portion 6a closes the outlet 4, and when ascending, the front wall portion 6b closes the inlet of the discharge nozzle 3, and at the same time, between the top portion 6a and the upper surface of the bottom wall 2, there is a hole opposite to the nozzle 3. The outlet 4 is opened by securing an opening facing the direction, and the molten metal P can be extracted from there into the gutter 5. 7 is
A cylinder for moving the plug member 6 up and down.
It is located outside of the

In this tundish, normally the plug member 6 is lowered to close the extraction port 4 as shown in FIG.
Molten metal P is injected into the casting apparatus main body from the discharge nozzle 3. If any abnormality occurs in the main body of the casting apparatus, the cylinder 7 is operated to push up the plug member 6 to close the discharge nozzle and open the extraction port 4, as shown in FIG. Open up,
The outflow of the molten metal P into the casting apparatus main body is stopped, and the molten metal P in the tundish is extracted to the outside from the extraction port 4.

[Effects of the Invention] From the above explanation, according to the tundish of the present invention, in an emergency, the molten metal discharge port can be closed and the extraction port can be opened at the same time by a single action of pushing up the plug member. Therefore, the conventional problem of molten metal leaking into the casting apparatus main body in an emergency can be reliably solved. Further, since the same plug member performs two roles, only one operating mechanism is required, and the configuration can be simplified. This is extremely advantageous since the plug member can only be moved in emergency situations.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, with FIG. 1 being a side sectional view showing a normal state and FIG. 2 showing an emergency state. 1... Side wall, 2... Bottom wall, 3... Discharge nozzle (discharge port), 4... Extraction port, P... Molten metal.

Claims (1)

[Scope of utility model registration request] A molten metal outlet is provided at the bottom of the side wall, an outlet is provided near the outlet in the bottom wall for extracting the molten metal in an emergency, and the outlet is provided with a molten metal that closes the outlet when the molten metal is pushed upward. A tundish for a continuous casting apparatus, characterized in that a plug member for opening an extraction port is fitted.