JPS5942205Y2 - Sliding plate for molten metal flow rate control device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sliding plate for a molten metal flow rate control device, and particularly relates to a sliding plate having a frame provided in a cassette type on its outer periphery.

Conventionally, the sliding plate of a molten metal flow rate control device, such as a sliding nozzle device, is made of a refractory material, and an iron frame is placed around the outer periphery of the sliding plate body with refractory mortar interposed therebetween to increase the strength of the sliding plate body. are improving.

However, the sliding plate having such a structure has a disadvantage that, if the sliding plate main body is damaged by melting, a great deal of labor and time is required to replace the main body.

For this reason, a cassette-type sliding plate as shown in FIG. 1 has recently been adopted.

That is, in FIG. 1, 1 is a refractory sliding body having a discharge hole 2, and an iron frame 3 is arranged around the outer periphery of this sliding plate body 1.

Then, the entire side wall 4 of the main body 1, which is substantially orthogonal to the direction of the sliding force shown by the arrow, is coated with a dent 5'J? The main body 1 and the frame 3 are fixed by pressing a fixing metal fitting 7 pressed by a push metal fitting 6.

However, in a sliding plate having such a structure, when fixing the sliding plate main body 1 and the frame 3, if the fixing metal fitting 7 is brought into contact with the center of the side wall 4 that is substantially orthogonal to the sliding direction, the problem occurs. Pressure is applied to the axis of the main body 1 in the sliding direction, including the discharge hole 2, and stress is concentrated on the discharge hole 2. Therefore, during use, the molten metal contact surface 8 of the sliding plate body 1 located on the axis The thermal shock of the molten metal causes cracks, and as a result, the molten metal enters into the cracks, potentially damaging the slide plate body or causing steel leakage.

The present invention was developed to solve the above-mentioned drawbacks, and by improving the fixing structure between the sliding plate body and the frame body, it prevents cracks from forming on the molten metal contact surface of the body and extends the service life. An object of the present invention is to provide a significantly improved sliding plate for a molten metal flow rate control device.

An embodiment of the present invention will be described below with reference to FIG.

In the figure, reference numeral 1 denotes a refractory slide plate body having a discharge hole 2, and an iron frame 3 is disposed around the outer periphery of the slide plate body 1.

The frame 3, which comes into contact with one side wall 4a of the main body 1 which is substantially orthogonal to the sliding direction shown by the arrow, has a recess 9 in the center of the inner wall.
is formed.

Also, a side wall 4 opposite to one side wall 4a of the sliding plate main body 1 is provided.
A fixing fitting 10 having a U-shaped cross section is pressed by a pusher 5 and a pusher 6 to the side wall 4b.Fixing fittings 10 are pressed to both ends of the side wall 4b to connect the sliding plate main body 1 and the frame. Body 3 is fixed.

According to such a configuration, when the sliding plate main body 1 and the frame body 3 are fixed, the one side wall 4a of the main body 1 does not come into contact with the entire inner wall of the frame body 3, but the side wall 4a formed on the inner wall Both ends of the side wall 4a are brought into contact with the inner wall of the frame 3 by the recess 9, and the fixing fittings 10 are pressed against both ends of the side wall 4b of the slide plate main body 1 that faces the other side wall 4a. .

Since the main body 1 and the frame 3 are fixed so that no pressure is applied on the axis of the sliding direction including the dimension of the discharge hole 2 of the main body 1, the heat generated by the molten metal during use is Even if subjected to impact, the molten metal contact surface 8 of the sliding plate main body 1 located on the axis can be prevented from cracking, and as a result, damage to the sliding plate main body 1, and steel leakage from the main body 1 can be prevented. can be prevented.

In addition, by pressing both ends of the side surface 4b of the sliding plate main body 1 with the fixing metal fittings 10 having a Y-shaped cross section, the side surface 4b of the main body 1 can be pressed.
Since both ends of b can be pressed with the same force, the sliding plate main body 1 can be fixed to the frame body 3 without applying biased force to the main body 1, and as a result, pressure is applied to the axis of the discharge hole 2 of the main body 1. By creating a structure that avoids the application of stress, it is possible to prevent uneven stress from occurring and prevent cracks from occurring due to thermal shock.

As detailed above, the present invention prevents the molten metal contact surface of the slide plate body from cracking in a short period of time during use, and prevents damage to the slide plate body and steel leakage from the body. This has remarkable effects such as being able to significantly extend the service life by preventing damage to the sliding plate body, and allowing the frame body to be replaced extremely easily if the sliding plate body is damaged.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing a conventional sliding plate for a molten metal flow rate control device, and FIG. 2 is a partial sectional view of a sliding plate for a molten metal flow rate control device showing an embodiment of the present invention. 1... Sliding plate body, 2... Discharge hole, 3
...Frame body, 4a...One side wall of the sliding board main body, 4b...Other side wall of the sliding board main body, 8...
... Molten metal contact surface, 9... Concavity, 10...
···securing bracket.

Claims (1)

[Scope of utility model registration request] A slide plate body having a discharge hole and a frame placed around the outer periphery of the slide plate body are attached to a slide plate fixed with fixing metal fittings, and the slide plate body is arranged substantially perpendicular to the sliding direction. Fixing metal fittings having a U-shaped cross section are press-fitted to both ends of one side wall, and a recess is formed in the center of the inner wall that abuts the other side wall of the sliding plate body, which is substantially orthogonal to the sliding direction of the sliding plate body. A sliding plate for a molten metal flow rate control device, characterized in that the sliding plate is fixed to a frame body having a molten metal flow rate control device.