JPH049616B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a continuous thin plate casting machine, and particularly to a continuous thin plate casting machine suitable for replacing a circulating body.

[Background of the invention]

As a conventional thin plate continuous casting machine, JP-A-58-
38640, Japanese Patent Application Laid-Open No. 58-216360, etc., which include a pair of endless circulating bodies arranged opposite to each other, and fixed side plates in a tapered shape arranged along both side edges of the circulating bodies. A casting space is formed, into which molten metal is supplied and solidified thin plates are carried out from below. In this type of continuous casting machine,
Conventionally, there has been a problem with the lifespan of the circulatory body. In other words, the circulation body is usually made of an endless welded mild steel plate with a thickness of about 0.5 to 3 mm, and the surface is in contact with high-temperature molten metal near the casting hole, and the back side is in contact with low-temperature coolant. Because they are used under severe conditions, such as coming into contact with the environment, they are subject to a decrease in strength due to thermal stress fatigue, and are also repeatedly bent during circulation by guide rollers, reducing their strength. As a result, they are highly consumable and require periodic replacement. Conventional circulating body replacement work involved removing the circulating body, threading a new mild steel plate, and welding its ends online, which was inefficient in terms of labor and time. Another problem was that the reliability of the welding process used to make the body into an endless shape was low.

In addition, in order to reduce slab cracking, it is necessary to reduce the gap between the stationary side plate and the circulating body (0.2 mm or less), but the fact that the distance between the side plate and the circulating body is very narrow also makes it necessary to replace the circulating body. This was one of the causes of poor workability.

[Purpose of the invention]

The present invention has been made in view of the problems of the prior art, and its object is to provide a thin plate continuous casting machine in which the circulating body can be easily replaced.

[Summary of the invention]

In the thin plate continuous casting machine according to the present invention, a casting space is formed by a pair of circulating bodies disposed opposite to each other and fixed side plates having a tapered shape disposed along both side edges of the circulating bodies. The body includes two or more guide rollers supported on an integrated frame supported on a support frame fixed to a continuous casting equipment line, and a movable frame fixed within the line but movable outside the line. In the thin plate continuous casting machine, the circulating body is wound around a supported tension applying roller, and the circulating body is removed from the tension roller in an endless state and is carried out of the continuous casting equipment line together with the integrated frame. It is characterized by being able to be carried out, so that a circulating body formed in an endless shape is prepared in advance and attached to a new movable frame.
Since the entire movable frame can be replaced, the circulating body can be quickly replaced.

[Embodiments of the invention]

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a plan view of a continuous thin plate casting machine according to the present invention, FIG. 2 is a vertical front view thereof, and FIG. 3 is a cross-sectional side view thereof.

In these figures, the thin plate continuous casting machine is formed by a pair of circulating bodies 1, 1 arranged opposite to each other, and a pair of side plates 9, 9 arranged along the vicinity of both side edges of both circulating bodies 1. It mainly consists of a casting section and a delivery section extending downward from the casting section.

The circulating body 1 is formed into an endless shape by welding the ends of a mild steel plate, and includes guide rollers 2 and 3 supported by an integrated frame 10 and a tension applying roller 4 supported by a moving frame 18. The guide roller 3 is driven to circulate in the direction of arrow A. Circulating body guides 5 and 6 are arranged between the guide rollers 2 and 3, which are fixed to the integrated frame 10 and are used to guide the circulating body 1 and to determine the linear shape of the slab in the casting section. The insides of the circulating body guides 5 and 6 are formed hollow, and the guide surfaces are provided with cooling water spout holes 7 and cooling water recovery holes (not shown), so as to cool the back surface of the circulating body 1. It's summery. A side plate 9 disposed between the circulating body guides 5 and 6 is arranged with a slight passage interval between the circulating body guides 5 and 6 to allow the circulating body 1 to pass through. 1 is sandwiched between circulating body guides 5 or 6, respectively. The circulating body guide 5 is fixed to the integrated frame 10 and its position is immovable, but the circulating body guide 6 can be moved by a moving device 11 in the direction of increasing the distance between the guides 5 and 6. ing.

The integrated frame 10 is configured in a U-shape in plan with an opening on the operation side, and a circulating body 1 is installed in this opening.
are placed facing each other. A flange portion 10A is protruded from the integrated frame 10, and this flange portion 10A is fixed by a fixing portion 13 to a support frame 12 extending on the continuous casting equipment line, so that the lower part of the casting A conveyance section constituted by a group of cast slab conveyance rollers 14 and an equipment core are arranged to coincide with each other. The guide roller 3 is connected to a transmission 16 and an electric motor 15 fixed to the support frame 12 via a universal joint 17, and can be separated from the drive side at the universal joint.

On the other hand, the tension applying roller 4 is supported by a moving frame 18.
is guided by the overall frame 19 and moves the actuator 20 in the width direction of the circulating body 1 (in the direction of arrow B in FIG. 1).
The stroke is made possible by the operation of the . The overall frame 19 has a U-shaped part in which an opening 19A larger than the width of the circulating body 1 is formed as shown in FIG. state) has this opening 19
A is opened, and the circulating body 1 can be attached to and detached from the tension applying roller 4 through this opening 19A. Further, when the actuator 20 moves forward (the state shown in FIG. 1), the tip end 18A of the moving frame 18 fits into the stopper 21 formed in the U-shape, thereby supporting the tensioning roller 4. It is designed to increase the rigidity of the part. The overall frame 19 is installed on the support frame 12, and is attached to a guide base 22 so that it can be moved in the direction of arrow C in FIG. 1 tension can be adjusted.

Casting work using the thin plate continuous casting machine configured as described above is performed by applying tension to the circulating body 1 with the tension applying roller 4.
is driven to circulate, and pressurized water is injected from the cooling water spout holes 7 of the circulating body guides 5 and 6 to enable cooling and floating of the back surface of the circulating body 1. In this state, molten metal is transferred between the circulating body 1 and the side plate. 9 and into the casting space formed by. As the circulating body 1 moves, the molten metal solidifies into slabs 24 and passes through the roller group 1.
It is carried out from the carrying-out part formed by 4. During this casting work, each roller 2,
3 and 4, tension and repeated bending force are applied, and thermal stress is also generated due to the temperature difference between the front and back surfaces of the circulating body, and the life span is as short as about 40 to 60 hours. After the predetermined usage time has elapsed, it is necessary to replace the circulating body 1, and the procedure for replacing the circulating body 1 will be described below.

When replacing the circulating body 1, first disconnect the universal joint 17 of the driving force transmission part of the guide roller 3, simultaneously release the fixing means by the fixing part 13, and then drain the cooling water into the circulating body guides 5 and 6. The connections of the water supply and drainage pipes are disconnected, and the integrated frame 10 is separated from the continuous casting equipment line side. Simultaneously with the separation work of the integrated frame 10, or prior to this separation work, the mounting state of the circulating body 1 is made to be bent. That is, as shown in FIG. 4, first actuate the actuator 23 to move the overall frame 19 to the
The tension applying roller 4 is moved from the position shown by the two-dot chain line in the figure to the position shown in the solid line in FIG. Move the opening 19A as shown in FIG.
to the open state. In this state, there is sufficient slack in the circulating body 1, so that it is easy to remove the circulating body 1 from the tension applying roller 4.

After the separation work of the integrated frame 10 from the continuous casting equipment line and the removal work of the circulating body 1 from the tensioning roller 4 as shown in FIG. 4 are completed, as shown in FIGS. 5A and 5B, Next, the integrated frame 10 is lifted up by a crane (not shown) and carried out of the continuous casting equipment line.

Outside the line, another unit with the same structure as the integrated frame peripheral mechanism that was carried out is prepared.
By assembling and fixing this new separate unit to the continuous casting equipment line, the circulating body 1 can be replaced with an extremely simple operation. That is,
As long as the area to be removed all at once is prepared in advance as a separate unit, the time required for replacement and restoration can be extremely short.

When pulling out the circulating body 1 from the integrated frame unit that has been removed from the line all at once, the moving device 11 is first used to move the circulating body guide 6 to widen the distance between the guides 5 and 6. Integrated frame 10
Since it is open on the operation side, the circulating body 1 can be pulled out without difficulty as shown in FIG. Furthermore, by removing the side plate 9 from the integrated frame 10, sufficient space for replacing the circulating body 1 can be secured without moving the circulating body guide 6 using the moving device 11. In order to set the passage interval when installed, or to perform maintenance and inspection work on the cooling water spout holes 7 of the circulating body guides 5 and 6, the cooling water recovery holes, the guide surface condition, etc., the moving device 1 is used.
1, it is essential to widen the distance between the circulating body guides 5 and 6.

As described above, according to this embodiment, the guide rollers 2 and 3, the circulating body guides 5 and 6, the side plate 9, and the circulating body 1
Since the unit is assembled into the integrated frame 10 and can be replaced as a single unit, the following effects can be obtained.

By replacing the old and new units, it is possible to minimize the time required to replace the circulating body, thereby significantly improving the equipment operating rate.

Since other consumables including the circulating body can be replaced off-line, time constraints are freed and sufficient time can be spent on maintenance and maintenance. In particular, for circulating bodies, the conventional welding process for endless welding can now be performed off-line and as a single item, improving the reliability of welding work and extending the life of the circulating body. You can expect it.

Since the tension applying device, which has a complicated structure and a large device weight, is made into a part other than the unit that can be removed all at once, the total weight and space of the unit can be greatly reduced, and handling workability can be expected to improve accordingly.

Further, in this embodiment, one side of the integrated frame 10, for example, the operating side, is made open, and the circulating body guide 6 is movable, so that the interval between the guides 5 and 6 can be expanded. , 6 can be secured with sufficient maintenance space.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the circulating body can be replaced within a short period of time, so it is possible to significantly improve the equipment operating rate.

The production capacity of continuous thin plate casting machines is
Most of them are in the 100 to 150 ton/t class, and it can be predicted that the economic ripple effect will be very large as the operating rate improves.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line shown in FIG. 1, FIG. 3 is a cross-sectional view taken along the line shown in FIG. 1, and FIG. FIG. 5a is a plan view showing the structure around the tensioning roller support part, FIG. FIG. 6 is a plan view when the circulating body is removed from the integrated frame. DESCRIPTION OF SYMBOLS 1... Circulating body, 2, 3... Guide roller, 4... Tension imparting roller, 5, 6... Circulating body guide, 9... Fixed side plate, 10... Integrated frame, 11... Moving device, 18... Moving frame, 19... Overall flame,
20...actuator, 22...guide base, 2
3... Actuator, 24... Slab.

Claims (1)

[Scope of Claims] 1. A casting space is formed by a pair of endless circulating bodies arranged opposite to each other and tapered fixed side plates arranged along both side edges of the circulating bodies, consists of two or more guide rollers supported on an integrated frame supported by a support frame fixed to the continuous casting equipment line, and a movable frame that is fixed within the continuous casting equipment line but can be moved outside the line. A thin plate continuous casting machine, which is wound around a tension applying roller supported by a thin plate continuous casting machine, wherein the circulating body is removed from the tension roller in an endless state and is removed from the continuous casting equipment line integrally with the integrated frame. A thin plate continuous casting machine characterized in that the thin plate continuous casting machine is adapted to be carried out to a machine. 2. The continuous thin plate according to claim 1, wherein the movable frame has an opening for attaching and detaching the circulating body on either the operating side or the driving side of the continuous casting equipment line. Casting machine. 3. The thin plate continuous casting machine according to claim 1, wherein the movable frame is provided with a circulating body guide having a function of cooling the back side of the circulating body in contact with the molten metal. 4. The thin plate continuous casting machine according to claim 1, wherein at least one of the guide rollers on which the circulating body is wound is provided with a meandering correction function of the circulating body.