JP3083734B2 - Surface pressure load device for slide valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide valve for controlling the amount of molten metal flowing out at a spout of a molten metal container such as a molten metal processing facility, and more particularly to a surface pressure for applying a surface pressure to a plate brick. Related to a load device.

[0002]

2. Description of the Related Art A slide valve for adjusting an outflow amount of a molten metal container in equipment such as continuous casting is provided.

As shown in FIG. 8, a slide valve device main body 2 fixed to a bottom 1a of a tundish or a ladle 1 as a molten metal processing facility, as shown schematically in FIG. And a movable plate brick case 4 which overlaps with the plate brick mounting portion 3. Plate bricks 5 and 6 are housed inside these and fixed by bolts 7 and the like. Hydraulic cylinder 8 supported outside device main body 2
By changing the position of the holes 5a, 6a formed in the center of the plate bricks 5, 6 by the operation of the above, the outflow of the molten metal is controlled.

The plate bricks 5 and 6 generally have a device main body 2 and a holding frame 9 for engaging and holding the lower surface of a plate brick case 4 for holding the plate brick 6 as shown in a partial cross section in FIG. Nut 1 with bolt 10 via spring 11
2, the spring 11 is deflected at the end 10a of the bolt 10, and the plate brick 5,
There is a type which applies a surface pressure between 6 and a type which applies a surface pressure by a toggle mechanism as shown in FIG. 10, but as shown in FIG. In general, a hinge 14 is provided to open the case 4. The plate brick case 4 on the holding frame 9 is configured to engage with the engaging portion 8b at the tip of the rod 8a of the hydraulic cylinder 8 and slide on the holding frame 9 when the surface pressure is applied.

The above-mentioned slide valve plate brick 5,
No. 6, since it is continuously used while hot, there is abrasion damage due to molten metal, etc., and usually requires replacement after processing several ladles.

In addition, as disclosed in Japanese Patent Application Laid-Open No. 5-169213, the surface pressure load member is caused to swing by the expansion and contraction of the cylinder in the horizontal direction, and the locking portion of the surface pressure load member is made of a plate brick. There is a type in which a predetermined surface pressure is applied by causing the holding frame to enter (or retreat) along the lower surface from the side and pressing one end of the locking portion by a spring provided in the surface pressure load member. .

[0007]

However, in the above-mentioned surface pressure load structure using the conventional bolt or toggle mechanism, when the plate brick is replaced after use, the bolt 10, the nut 12 and the toggle mechanism 13 are opened to release the plate brick. After releasing the surface pressures of 5 and 6, it is necessary to open the plate brick case 4 and the holding frame 9 to take out the plate brick and load and fix a new plate brick. Although all of these operations are performed manually, it is not easy because of the hot work. Further, even if this operation is to be automated by a robot or the like, it is structurally necessary to automatically open the plate brick case 4 and the holding frame 9 after removing the bolts 10 and the nuts 12 or releasing the toggle mechanism 13. Complex and extremely difficult, plate bricks 5,6
Could not be automated.

Further, in the apparatus described in the above publication of the plate-brick inter-assembly exchange system (assembly of the plate bricks 5, 6 and the lower nozzle is referred to as a plate-brick assembly) on the premise of automation, the surface pressure load member is provided. Therefore, it is necessary to provide a stopper for preventing the surface pressure load member from moving in the surface pressure releasing direction (outward) by a spring force after a predetermined surface pressure load is performed, and the structure becomes complicated. In addition, in order to open the surface pressure load member to a predetermined position, there is a problem that the expansion and contraction stroke of the expansion and contraction member must be increased.

In view of the foregoing, the present invention provides a stopper for releasing a surface pressure and opening a clamp portion at the same time, increasing the opening angle thereof, and for restraining the clamp portion when a surface pressure is applied. An object of the present invention is to provide a surface pressure load device for a slide valve, which does not require any kind and can simplify the structure.

[0010]

As a means for solving the problems of the prior art, the present invention provides a slide valve for controlling the amount of molten metal flowing out of a molten metal container. A clamper for pressing and holding the plate brick assembly installed at the outlet with a predetermined pressing force, and a spring or the like that supports the clamper so that it can swing and swing and loads in the plate brick pressing direction via the clamper. An elastic holder having an elastic body, a large arm having one end pivotally supported by a bearing on the fixed portion side, and a small arm having one end pivotally supported by the tip of the large arm and the other end pivotally supported at an intermediate position of the clamper. A link mechanism consisting of an arm and a pair of left and right arms, wherein when the large arm is swung and swung, the plate brick assembly is held at the tip of the clamper via the small arm and the elastic holder Pressed with a predetermined urging force by the elastic member and at the turning retreat angle of the clamper with respect to the turning angle of the large arm was made to be large at the time of opening.

The swinging and swinging of the large arm may be manually performed. Preferably, the left and right large arms are connected by a telescopic operating member such as an actuator, and the telescopic operation of the telescopic operating member causes the plate brick by the clamper to be moved. It is preferable to perform the surface pressure load operation and the swinging and retreating operation for holding and releasing. In order to bring the tip of the clamper into surface contact with the plate brick assembly side, it is desirable to provide a clamp member at the tip of the clamper so as to be swingable.

Therefore, by turning the large arm outward by the actuator or other appropriate means, the elastic body of the armature holder is shortened to release the surface pressure load state, and the small arm is turned to rotate the clamper. Then, the clamp portion largely retreats to the lower outside of the plate brick assembly to release the holding, and the plate brick assembly can be taken out.

When setting the plate brick assembly,
By pivoting the large arm inward, the clamper pivots and pivots in the opposite direction, and the clamp portion of the clamp strikes the lower surface of the plate brick assembly directly or through the holding frame, and the elasticity of the elastic holder is reduced. The plate brick assembly can be pressed with a predetermined pressing force by the urging force of the body, and can be supported by applying a predetermined surface pressure to the plate brick.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings and the same reference numerals as those in FIGS.

FIG. 1 is a bottom view of one embodiment of the surface pressure load device according to the present invention. FIG. 2 is a view taken in the direction of arrow A in FIG.
An arrow is shown.

In the above figures, reference numeral 20 denotes an apparatus main body fixed to the bottom of a molten metal container (eg, ladle 1).
A pair of left and right clampers 21 and 21 for pressing and holding the plate brick assembly with a predetermined pressing force are provided on both sides in the longitudinal direction of the apparatus main body 20 in a swingable manner.

The clampers 21, 21 are mounted on bearing members 25, 25 below the elastic holders 24, 24 provided on the guide members 22, 22 of the apparatus main body 20 by keys 23, 23 so as to be slidable up and down. The elasticity of the coil springs 27, 27... As elastic bodies, which are pivotally supported by the shafts 26, 26 and are accommodated in the elastic holders 24, 24,
24 is constantly biased downward in FIG.

A clamp member 28 is attached to the distal ends of the clampers 21 and 21 so as to swing freely so as to make surface contact with the lower surface of the plate brick assembly. For example, as shown in FIG. 7A, the clamp member 28 is attached by forming an arc-shaped concave portion 29 at the distal end of the clamper 21 and forming the concave portion 29 on the surface opposite to the clamp surface 28a of the clamp member 28. The bolt 30 which fits the arc-shaped convex portion 28b and passes through the long hole 29a formed in the concave portion 29 is attached to the clamp member 28.
To the clamp member 2 along the long hole 29a.
As shown in FIG. 7 (B), the clamp member 28 is formed of a columnar member, and a part of its peripheral surface is cut off to form a clamp surface 28a. 7 is rotatably attached to a bearing portion 31 at the tip of the clamper 21 by a shaft 32. Further, as shown in FIG. 7C, the clamp member 28 of FIG. Any form can be adopted, such as a case in which it is unremovably stored in a bearing box 33 provided in the box 33 and is rotated in the box 33.

The clampers 21 and 21 include a link mechanism 3
4 and 34, so as to swing. This link mechanism has a large arm 36 whose one end is pivotally supported by the apparatus main body 20 by a shaft 35, one end connected to the tip of the large arm 36 by a shaft 37, and the other end provided by a shaft 38 at an intermediate position of the clamper 21. A small arm 39 connected to the
As shown in FIG. 5, the swing swing angle β of the clamper 21 is larger than the swing swing angle α of the large arm 36.

A telescopic operating member 40 is connected between the distal ends of the large arms 36, 36 so that the left and right large arms 36, 36 are swung by the telescopic operation.
At the time of the maximum swing rotation, the stoppers 41, 41 of the apparatus body 20 are used.
And the stop position is determined. As the telescopic operation member 40, a nut 42 is rotated by a hydraulically or pneumatically double-headed actuator or an electric motor or the like (not shown) as shown in FIG.
For example, a piston rod 40a is connected to the large arms 36, 36 in the case of an actuator, and the piston rod 40a is connected to the large arms 36, 36 in the case of the screw shafts 43.

The large arm 36 is connected to the stopper 4
1, a position where the axis 38 of the connection point between the small arm 39 and the clamper 21 slightly exceeds a line passing through the centers of the axes 35 and 37 of the large arm 36 (outside the line passing through the centers of the axes 35 and 37). ), And the shaft 38 serves as a fulcrum at this time, and the springs 27 and 2 of the
Are applied to the crumb member 28 to apply a predetermined load to the plate brick assembly and hold it.

Therefore, when the large arms 36, 36 are pivoted outward from the holding state on the left side in FIGS. 3 and 4, while the shaft 38 of the small arm 39 enters the inside of the large arm 36 at the initial stage of pivoting, the machine holder 24 is a spring 27 inside it,
27. The shaft 38 rises while bending the...
6 passes through a line passing through the center of the shafts 35, 37, and the surface pressure load by the springs 27, 27... To the plate brick assembly is released.
, The clamper 21 swings and retreats downward. At this time, the clamper 21 pivots more than the large arm 36 by the action of the small arm 39, and is opened to an opening angle necessary for removing the plate brick assembly using a mechanical means such as a robot.

When a new plate brick assembly is mounted, the large arms 36, 36 are turned inward after the plate brick assembly is held at a predetermined position by mechanical means such as a robot. The clampers 21 and 21 swing and swing in the closing direction via the contact, and after the clamp surface 28a of the clamp member 28 comes into surface contact with the plate brick assembly, the large arms 36 and 36 are stopped by the stoppers 41 and 41.
The shaft 38 of the small arm 39 crosses a line passing through the centers of the shafts 35 and 37 of the large arm 36 before contact with the armature. Thereafter, the shaft 38 serves as a fulcrum and the load of the springs 27, 27. It acts on the clamper 21 via the holder 24 and presses and holds the plate brick assembly with which the clamp member 28 is in contact with a predetermined surface pressure (see FIGS. 3 and 5).

[0024]

As described above, according to the present invention, the load on the elastic body for maintaining the surface pressure of the plate brick assembly of the slide valve is released to release the surface pressure, and the plate brick assembly is held. Since the opening and closing can be performed fully automatically, the plate brick can be replaced by a mechanical means such as a robot, for example. In particular, a plate brick assembly type slide valve in which the plate brick is made into a cartridge is provided. Application to is effective. In addition, when an actuator is provided, remote operation becomes possible, and human work during hot work is completely abolished, so that labor can be remarkably reduced, and this is extremely effective in terms of safety. In particular, according to the configuration of the present invention, the clamper can be swung largely by the small swing swing of the large arm by the telescopic operating member or the like, and therefore, the stroke of the telescopic operating member can be short, and these can make the device compact. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a bottom view of a main part showing an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is a view taken in the direction of arrow B in FIG. 1;

FIG. 4 is a cross-sectional view taken along the line CC of FIG. 1, in which the left half is in a clamped state and the right half is in an open state.

FIG. 5 is a detailed view at the time of clamping.

FIG. 6 is a view corresponding to FIG. 3, showing a modification of the telescopic operating member.

FIGS. 7A to 7C are cross-sectional views showing examples of mounting a clamp member.

FIG. 8 is a vertical sectional front view showing a configuration example of a conventional type slide valve.

FIG. 9 is a vertical sectional side view of a portion showing a conventional plate brick setting state.

FIG. 10 is a longitudinal sectional view showing a plate brick setting state of the conventional slide valve.

FIG. 11 is a longitudinal sectional view showing the open state.

[Explanation of symbols]

 Reference Signs List 1 molten metal container (ladle) 2 slide valve device main body 3 fixed plate brick mounting portion 4 movable plate brick case 5, 6 plate brick 8 hydraulic cylinder 9 holding frame 13 toggle mechanism 20 device main body 21 clamper 22 guide member 24 bullet holder 27 spring (coil spring) 28 clamp member 29 recess 33 bearing box 34 link mechanism 36 large arm 39 small arm 40 telescopic operating member 41 stopper 43 screw shaft

Continuation of the front page (56) References JP-A-61-195777 (JP, A) JP-A-5-169213 (JP, A) JP-A-61-189868 (JP, A) JP-A-7-26049 (JP, A) , U) Japanese Utility Model Showa 52-59724 (JP, U) Japanese Utility Model Showa 50-95411 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22D 41/40 B22D 41/34 520 B22D 11/10 340

Claims (3)

(57) [Claims] 1. A slide valve for controlling the amount of molten metal flowing out of a molten metal container, comprising: a clamper for pressing and holding a plate brick assembly installed at an outlet of the molten metal container with a predetermined pressing force. A machine holder having an elastic body such as a spring that supports the clamper so as to be swingably pivotable and applies a load in the plate brick pressing direction via the clamper;
A pair of left and right link mechanisms including a large arm having one end pivotally supported by a bearing on the fixed portion side and a small arm having one end pivotally supported at the tip of the large arm and the other end pivotally supported at an intermediate position of the clamper. When the large arm is swung and pivoted, the plate brick assembly is held at the tip of the clamper via the small arm, and is pressed against the elastic body of the elastic holder with a predetermined pressing force. A surface pressure load device for a slide valve, wherein a swing retreat angle of a clamper is larger than a swing angle of an arm. 2. A clamp member for contacting the plate brick assembly is provided at a tip end of the clamper, and the clamp member is swingably mounted so that a clamp surface thereof comes into surface contact with the assembly side. The surface pressure load device for a slide valve according to claim 1. 3. The left and right large arms are connected by an expansion / contraction member such as an actuator, and the expansion / contraction operation of the expansion / contraction member allows the clamper to perform a surface pressure load operation on the plate brick and to swing and retreat for holding and releasing. 3. The surface pressure load device for a slide valve according to claim 1, wherein the operation is performed.