JPH10216924A - Molding frame for executing lining refractory of ladle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the dimension of a molding frame to contract at the time of removing the molding frame and expand and shrink at the time of fitting the molding frame. SOLUTION: In this molding frame for lining a ladle, bearing pieces 3, 4, 5 dividing the inner periphery into almost three parts are fixed to an outer plate 2 having round shape in the plane view and forming the molding frame 1, and a fitting tool 12 near the center of the outer plate 2 and the bearing pieces 3, 4, are connected to each other with rods 7, 9, and the fitting tool 12 and the bearing piece 5 are connected to each other with a turn buckle 11. Then, a part of the outer plate 2 between the bearing pieces 3, 4 is cut-off and a bearing piece 16 is fixed at the end part of the cut-off outer plate 2 at the bearing piece 4 side. A flapper 17 covering the cut-off part is attached pivotally to this bearing piece 16 so as to be swingable in the horizontal plane and the flapper 17 is connected with the bearing piece 3 through the turn buckle 19 and with fitting tool 12 through a cylinder 21, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladle lining refractory construction form used for pouring a ladle lining irregular-shaped refractory in a steel mill or the like.

[0002]

2. Description of the Related Art Conventionally, ladles used in steelworks, etc., require periodic repair of the inner wall in order to insert high-temperature and high-heat molten steel, and the lining is constructed with an irregular-shaped refractory for the repair. Like that. In this case, as shown in FIG. 6, the laying portion b of the ladle a is preliminarily constructed, the mold c is placed thereon, and the upper portion f is formed in the gap e formed between the mold c and the steel shell d. A castable material shown by hatching is poured into the mold, and after the construction is completed, the mold c is removed when the material is hardened.

[0003] However, when the above-mentioned mold is removed, since the irregular-shaped refractory and the mold are attached, the mold cannot be removed unless the diameter of the mold is reduced. For this reason, in the related art, as shown in a plan sectional view of FIG. 7, a part of the circumference of the mold c was cut off when an irregular-shaped refractory was poured between the steel shell d and the mold c for construction. An expanding plate i whose center is supported in the mold c is provided so as to extend the portion g to the left and right via the left and right guide plates h, and when the construction is completed and the amorphous refractory hardens, the expanding plate is provided. a method of reducing the form c except for i
As shown in FIG. 8, a part of the mold c is detached from the outer peripheral wall j of the form by attaching an intervening piece m to the notched portion k in the same manner as in FIG. At the time, a method is provided in which the outer peripheral wall j of the form is reduced by extending the intervening piece m inward by an advancing / retreating device n such as a cylinder when the construction is completed. 2525271) and the like have been proposed.

[0004]

Under such circumstances, the thickness of the refractory lining used in the ladle is usually the size of the ladle, the material of the refractory and the use of the refractory as shown in FIG. Although it is determined in consideration of various conditions such as the number of times, when actually used, the operating conditions and the conditions such as the material of the refractory are changed, and it is necessary to change the thickness of the refractory. Conventional formwork can be reduced as described above before demolding, but when pouring in accordance with the thickness of refractory, the formwork dimensions must be changed accordingly. However, there is a disadvantage that the one having the specified size cannot be used. Therefore, when the thickness of the refractory changes each time, a formwork corresponding to it is necessary,
It was a big expense.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems by making it possible to reduce the size of the formwork when removing the formwork, and also to easily expand and contract the formwork when mounting the formwork. The present invention has been made to solve the problem, and an object of the present invention is to make it possible to enlarge or reduce the form in the XX direction and the YY direction in plan view by a telescopic mechanism. That is, in an irregular-shaped refractory construction formwork lined with a ladle, first, second, and third bearing pieces that divide the inner periphery into approximately three parts are formed on the inner surface of a circular outer plate that forms the formwork. The first and second bearing pieces are fixedly provided, and are provided near the center of the outer plate, and the first and second bearing pieces are connected by rods.
And a part of an outer plate between the first and second bearing pieces is cut out, and one end of the cut-out outer plate on one bearing piece side is connected to the bearing piece. A fourth bearing piece is fixed to the inner surface of the portion, and a flapper that covers a cutout outer plate portion is pivotally connected to the bearing piece so as to be rotatable in a horizontal plane. Thus, the attachment is connected to the attachment by an expansion device. Thereby, the Y-Y direction can be adjusted by operating the first telescopic mechanism provided inside the formwork, and the XX direction can be adjusted by operating the second telescopic mechanism.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 shows a formwork 1 for refractory lining of a ladle according to the present invention, in which an outer plate 2 has a circular shape in plan view and side surfaces are shown in FIGS. 2 and 3 in cross section. It has a substantially cylindrical shape in which the lower part is smaller in diameter than the upper part.

On the inner surface of the outer plate 2, there are first and
Second and third yoke-shaped bearing pieces 3, 4, and 5 are fixedly provided, respectively. One end of a rod 7 is connected to the first bearing piece 3 by a pin 6, and the second bearing piece 4 is provided. Has a rod 9
Are connected by pins 8. One end is connected to the third bearing piece 5 by a pin 10 and
A first turnbuckle 11 as an expansion and contraction mechanism is provided via rods on both sides, and the other ends of the rods 7 and 9 and the other end of the first turnbuckle 11 are provided near the center of the outer plate 2 and have a substantially isosceles triangular shape in plan view. The upper and lower parts are connected to the apex positions of the yoke-shaped fixture 12 by pins 13, 14, and 15, respectively, so that the shape formed by the rods 7, 9 and the first turnbuckle 11 is substantially Y-shaped. Mounted on

A part of the outer plate 2 between the first and second bearing pieces 3 and 4 is cut in a strip shape from the upper end to the lower end, and the cut out outer plate 2 on the second bearing piece 4 side is formed. A flat plate-shaped fourth bearing piece 16 is fixedly mounted on the inner surface of the end of the bearing piece.
6 is a flapper 1 that covers the cutout portion of the outer plate 2.
One end of the yoke-shaped bearing piece 17a fixed to the
8 and can be pivoted about a pin 18 in a horizontal plane.

At the other end of the bearing piece 17a of the flapper 17, a second turnbuckle 19 as a second telescopic mechanism is provided.
One end of a rod on the side is connected by a pin 20 and one end of a hydraulic cylinder 21 serving as a telescopic device using the pin 20 in common, and the other end of the hydraulic cylinder 21 is The pin 22 is connected via a joint at a position intermediate between the pins 13 and 14. The other end of the rod on the second turnbuckle 19 side is connected to the first bearing piece 3 by sharing the pin 6.

FIG. 1 shows a state in which a ladle (not shown) and the outer plate 2 of the mold 1 are installed so as to have an appropriate space.

The above structure, however, is shown in FIG.
1 is shown in FIG. 1 and FIG. 3 is a sectional view taken along the line BC in FIG. 1, but the first turnbuckle is reduced by the amount that the lower part of the outer plate 2 is reduced in diameter from the upper part. If the adjustment is made by adjusting the eleventh and second turnbuckles 19 to the reduction side, the upper and lower parts can be constituted by the same parts.

The power source for expanding and contracting the hydraulic cylinder 21 is as follows.
Although not shown, a hydraulic unit may be provided inside or outside the outer plate 2 and connected by piping such as a hose.

When the mold 1 is set on the ladle, the cylinder 21 is extended to bring the outer plate 2 and the flapper 17 into close contact with each other, and as shown in FIG. Therefore, it is desirable to make the tip 2a of the outer plate 2 thin like a blade to reduce the step. In this way, it is possible to pour in a state where the seams are smoothly connected.

Next, the procedure for removing the frame and the procedure for changing the thickness of the refractory lining will be described.

First, the mold 1 after casting is in the state shown in FIG. 1. When the form is removed from the state shown in FIG. 1, the hydraulic cylinder 21 is reduced as shown in FIG. When the flapper 17 is pulled inward, the outer panel 2 can be separated from the hardened lining refractory with a reduced diameter. Next, when changing the thickness t of the lining refractory (see FIG. 6), the thickness t of the refractory is reduced by extending the first turnbuckle 11 and the second turnbuckle 19, and is increased by reducing the thickness. The desired thickness can be set by changing the outer diameter of the outer plate 2.

That is, when the first turnbuckle 11 is expanded and contracted, the outer plate 2 expands and contracts in the YY direction in FIG.
When the turnbuckle 19 expands and contracts, the XX direction of the outer plate 2 expands and contracts, so that the shape of the mold 1 can be arbitrarily deformed into a substantially true circular shape or a certain elliptical shape by operating the two turnbuckles.

The telescopic mechanism and telescopic device shown in FIG. 1 are provided above and below the inside of the outer plate 2 as shown in FIGS. It can also be provided in the lower three stages.

In the above description, since the frequency of the change of the thickness of the refractory lining is less than the frequency of the removal of the frame, the two turnbuckles 11 and 19 are manually expanded and contracted. Needless to say, it may be performed in a cylinder.

FIG. 1 shows a hydraulic cylinder 21 as an example of the telescopic device, but it may be a pneumatic cylinder or an electric cylinder.

[0021]

According to the present invention having the above-described structure, the following effects can be obtained.

1) When removing the formwork, the formwork can be easily separated from the refractory lining by contracting the expansion and contraction device.

2) When setting the form, the outer plate and the flapper can be brought into close contact with each other by extending the expansion and contraction device, so that the outer plate can be easily poured outside.

3) When it is desired to reduce the thickness of the refractory lining, the diameter of the formwork may be increased by extending both expansion and contraction mechanisms. This can be done by extending the telescopic mechanism.

4) When it is desired to increase the thickness of the refractory lining, it is only necessary to reduce the diameter of the form by contracting both expansion and contraction mechanisms, and to increase the thickness in either the X direction or the Y direction. By contracting the telescopic mechanism.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a formwork for refractory lining of a ladle according to the present invention.

FIG. 2 is a cross-sectional view taken along line AC of FIG.

FIG. 3 is a sectional view taken along line BC of FIG. 1;

FIG. 4 is an enlarged view showing details of a flapper portion in FIG. 1;

FIG. 5 is an operation diagram when the frame is removed from FIG. 1;

FIG. 6 is a sectional view showing a current ladle;

FIG. 7 is a plan view showing an example of a conventional structure for removing a ladle mold.

FIG. 8 is a plan view showing another example of the conventional structure for removing a ladle frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Formwork 2 Outer plate 3 1st bearing piece 4 2nd bearing piece 5 3rd bearing piece 7, 9 rod 11 1st turnbuckle (1st expansion-contraction mechanism) 12 Fixture 16 4th bearing piece 17 Flapper 17a Bearing piece 19 Second turnbuckle (second telescopic mechanism) 21 Hydraulic cylinder (telescopic device)

Claims (1)

[Claims] 1. An irregular-shaped refractory construction formwork lined with a ladle, wherein the inner periphery of the outer surface of the circular outer plate forming the form form is substantially divided into three parts. And the first and second bearing pieces are connected by a rod, and the fitting and the third bearing piece form a first telescopic mechanism. And a part of an outer plate between the first and second bearing pieces is cut out, and a fourth bearing piece is fixed to an inner surface of one end of the cut out outer plate on one bearing side. Then, a flapper covering the cutout outer plate portion of the bearing piece is pivotably pivoted in a horizontal plane, and the flapper is connected to one of the bearing pieces by a second expansion / contraction mechanism, and the mounting tool is connected to the attachment by an expansion / contraction device. A ladle lining refractory construction formwork that is connected to each other.