JP2554124Y2 - Forced lowering mechanism of immersion nozzle of slide valve device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a slide valve (hereinafter referred to as S)
V) of the apparatus.

[0002]

2. Description of the Related Art In a conventional SV apparatus, there is a mechanism for fitting an immersion nozzle into an immersion nozzle case and pressing the immersion nozzle against the lower surface of the lower nozzle. However, the immersion nozzle is detached (removed) from the lower nozzle for replacement or the like. There is no special mechanism for this, and it is removed by its own weight.

[0003]

The joint between the lower nozzle and the immersion nozzle is infiltrated by molten steel (metal ingot), and both are fixed by the sintering of the used packing. Is released and the immersion nozzle case descends, the immersion nozzle does not fall under its own weight, and is
At present, it is known that the work is performed in a narrow and high-temperature environment, which involves a danger, and also hinders automation of immersion nozzle setting.

[0004]

Means for Solving the Problems The present inventors have developed a forced immersion nozzle forcing mechanism of the present invention as a result of various studies and experiments in order to solve various drawbacks of the conventional method.
The technical configuration of the present invention is as follows. In the immersion nozzle support mechanism of the SV device, a projection is provided on the outer periphery of the immersion nozzle case, and the immersion nozzle support arm is provided with an immersion nozzle pushing-down locking portion that engages with the projection. Provided above the immersion nozzle support arm,
The submerged nozzle case is provided with a submerged nozzle fixing fitting insertion hole, and the submerged nozzle forcible pressing mechanism of the SV apparatus is provided.

A specific example of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 to 3 are a front view, a side view and a bottom view schematically showing an example of the present invention. (1) is an immersion nozzle case, which supports the immersion nozzle (10) as shown, and has at least two projections (2) on its outer periphery. (3) is an immersion nozzle support arm, which is a mechanism for raising and lowering the support arm (3) by operating an air cylinder provided in the slide case (11). Immersion nozzle (1
The immersion nozzle case (1) set with (0) is moved in the direction of arrow A from the position shown in FIG. 2, and the protrusion (2) is fitted into the groove (3 ') provided on the upper surface of the support arm (3). And the position is determined.

An immersion nozzle depressing locking portion (4) is provided outside the support arm (3) and in the groove (3 '), so that when the support arm (3) descends. Is a mechanism in which the locking portion (4) comes into contact with the projection (2), and therefore pushes down the immersion nozzle case (1).

Further, the immersion nozzle (1) used in the mechanism of the present invention.
0) is a structure to be described later, wherein the immersion nozzle case (1) is provided with at least one round or square fitting hole (5) for a immersion nozzle fixing bracket (6). The fitting (6) is fitted into the hole (5) and fitted into the upper open cutout (16 ') provided in the flange of the immersion nozzle, and when the immersion nozzle case (1) is lowered, The immersion nozzle fixture (6) inserted into the immersion nozzle case (1) presses the immersion nozzle (10), and the mechanism is capable of integrally lowering the nozzle case (1) and the immersion nozzle (10). .

The notch provided in the flange of the immersion nozzle is not an open top as described above but a straight groove or a groove with a bottom surface R. The immersion nozzle fixing bracket (6) is not square in cross section as shown in the figure. It may be round.

Further, in the immersion nozzle case (1), the fitting hole (5) can be easily machined by forming the fitting hole (5) into two parts vertically.

As shown in the bottom view of FIG. 3, an immersion nozzle support arm () connected to an air cylinder (12) attached to a slide case (two-layer type) or a seal case (three-layer type) of the SV device. 3) is rotated by 90 °, the immersion nozzle case (1) in which the immersion nozzle (10) is set is placed on the support arm (3), and is moved in the direction of arrow A so that the protrusion (2) Is positioned in the groove (3 ') on the upper surface of the arm (3), and thereafter, the arm (3) is rotated by 90 degrees about the air cylinder (12) as an arrow B, and the air cylinder (12) is rotated. Immersion nozzle (1
The upper end surface of 0) is tightly fixed to the lower end surface of the lower nozzle (15), and the pouring operation is started.

When replacing the immersion nozzle, the operation reverse to that of the above-mentioned setting is performed. However, even if the immersion nozzle is fixed to the lower nozzle by seizure or the like, the air cylinder (12) operates. The locking part (4) for lowering the immersion nozzle provided on the support arm (3) comes into contact with the protrusion (2) provided on the outer periphery of the immersion nozzle case (1), and the immersion nozzle case (1) is forcibly moved. Press down, immersion nozzle (1
Since No. 0) is locked to the immersion nozzle case (1) by the immersion nozzle fixing bracket (6) as described above, the fixing portion on the upper surface of the immersion nozzle is peeled off and detached from the lower surface of the lower nozzle.

FIG. 4 is a side view showing another embodiment of the present invention. This example was filed earlier by the present applicant (Japanese Patent Application No.
No. 143,173) The mechanism of the present invention is applied to a "submersible nozzle mounting mechanism of a slide valve device". In this application, a ring-shaped turntable (30) is rotatably mounted on an SV device slide case or seal case on the bottom surface of a molten metal container, and the turntable is provided with a flat portion and a projecting inclined portion on the lower surface thereof. An immersion nozzle support arm (23) having a ball receiving groove extending over the flat portion and the projecting inclined portion, and having a mechanism rotatable and vertically slidable on a pair of brackets (31) provided on the slide case or the seal case. ),
The support arm is provided with a spherical projection or a rotatable ball (32) which engages with the ball receiving groove at an upper end thereof, and a dipping nozzle holding hook (33) at a lower end thereof. The immersion nozzle support arm (23) is provided with an immersion nozzle press-down locking portion (24) above the hook (33), and the nozzle case of the immersion nozzle (10) is provided. The fixing means to (1) is the same as in the above-described example, and the same reference numerals indicate the same members.

5 and 6 are longitudinal sectional views of the immersion nozzle used in the mechanism of the present invention. FIG. 5 shows an example in which a notch groove (16) for fitting the immersion nozzle fixing bracket (6) is provided. The cross-sectional shape of the notch groove (16) is preferably substantially similar to the cross-sectional shape of the fixing bracket (6).

FIG. 6 shows an example in which the cutout portion for mounting the immersion nozzle fixing bracket (6) is a cutout portion (16 ') with an open top, which is not L-shaped in cross section but R-shaped at a corner. It may be.

The cutting direction of these notches is a two-layer type S
In the V apparatus, it is cut and arranged in the direction perpendicular to the discharge port axis of the molten steel discharge port (17) of the immersion nozzle, and in the three-layer SV apparatus, it is cut and disposed on the discharge port axis of the molten steel discharge port (17) of the immersion nozzle. Although the workability of setting the immersion nozzle fixing bracket (6) is better, the arrangement in the opposite direction to the above does not cause any mechanical problem.

[0017]

(1) Conventionally, the dipping nozzle fixed to the lower nozzle of the SV device is manually separated by a stick or the like to perform dangerous work under high temperature. The immersion nozzle can be separated by the operation, so that the safety of the operation is greatly improved and the operation time can be reduced.

(2) Since the mounting of the immersion nozzle has been mechanized, it has become possible to fully automate the mounting and dismounting of the nozzle as well as the mounting accuracy.

(3) The mechanism of the present invention can be applied to a conventional SV device by slightly improving members.

[Brief description of the drawings]

FIG. 1 is a front view schematically illustrating an example of an immersion nozzle forcible press-down mechanism of the present invention.

FIG. 2 is a side view schematically showing an example of the immersion nozzle forcible pressing mechanism of the present invention.

FIG. 3 is a bottom view schematically showing an example of the immersion nozzle forcible press-down mechanism of the present invention.

FIG. 4 is a front view showing another example of the mechanism of the present invention.

FIG. 5 is a vertical sectional view showing an example of an immersion nozzle used in the mechanism of the present invention.

FIG. 6 is a longitudinal sectional view showing another example of an immersion nozzle used in the mechanism of the present invention.

FIG. 7 is a top view of FIG. 5;

FIG. 8 is a top view of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Immersion nozzle case 2 Projection part 3 and 23 Immersion nozzle support arm 4 and 24 Locking part for pushing down 5 Fixture fitting insertion hole 6 Immersion nozzle fixture 10 Immersion nozzle 10 'Immersion nozzle flange 11 Slide case 12 Air cylinder 14 Nozzle hole 15 Lower nozzle 16 Notch groove 16 'Upper open notch 17 Molten steel discharge port 31 Bracket 32 Ball 33 Hook for holding immersion nozzle

Claims (2)

(57) [Scope of request for utility model registration] 1. An immersion nozzle support mechanism of an SV apparatus, wherein a projection (2) is provided on the outer periphery of an immersion nozzle case (1), and an immersion nozzle engaging arm (3) engages with the projection (2). A locking part (4) for nozzle depression is provided above the immersion nozzle support arm (3), and a fitting insertion hole (5) for the immersion nozzle fixing bracket (6) is provided in the immersion nozzle case (1). Characterized by a submersible nozzle forcing down mechanism of the SV device. 2. A mechanism for forcibly pressing down an immersion nozzle of an SV device according to claim 1, wherein said immersion nozzle case (1) is of a two-part type in a horizontal direction through a fitting insertion hole (5) for an immersion nozzle fixing bracket.