JPH0615097B2 - Water-cooled drum device in drum type continuous casting machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water cooling drum in a drum type thin plate continuous casting machine.

[Conventional technology]

A water cooling drum device in a conventional drum type continuous thin plate casting machine will be described with reference to FIGS. 3 and 4. FIG. 3 is a cutaway plan view of the apparatus, and FIG. 4 is a cutaway front view taken along line IV-IV in FIG. The conventional water-cooled drum device is the third
As shown in FIG. 4 and FIG. 4, when the molten steel 8 is continuously supplied to the casting mold formed by the pair of drums 1 rotating in the direction of the arrow and the side dam 7 and the thin plate 9 is continuously cast,
In order to cool the drum 1 heated by the cooling water, cooling water is fed into the water cooling chamber 10 from the water supply pipe 5 inserted into the hollow shaft 2 supported by the bearing 3 as shown by the arrow. Then, the drum 1 fitted in the hollow shaft 2 is cooled, and the water supply pipe 5
The water is discharged from the drain port 6 through a space formed by the outer surface of the hollow shaft 2 and the inner surface of the fixed outer tube 4. A water cooling drum A is constituted by the drum 1, the hollow shaft 2, the outer pipe 4, the water supply pipe 5, and the drainage port 6.

In the above-described conventional device, the cooling water absorbs the high heat of the drum 1 while passing through the water cooling chamber 10, is heated, and is discharged, so that the outlet side of the water cooling chamber 10, that is, the driven side W of the drum 1.
Has a drawback in that it has a lower degree of cooling than the drive side D and causes a considerable temperature difference, that is, a difference in expansion dimension. Further, since the driven side W of the drum 1 has a larger outer diameter dimension than the driving side D, the gap formed by the pair of drums 1 becomes narrower on the driven side W, and the plate is formed in the width direction of the thin plate 9 to be cast. There was a problem that caused a difference in thickness. Drum 1 driven by this conventional device
In consideration of the difference in thermal expansion between the two, even if the gap on the left side is widened in advance before the operation and the plate thickness of the thin plate 9 to be cast is adjusted, it is necessary to cope with the change in the thermal expansion under various operating conditions. In addition, the apparatus is expensive to adjust the gap of the drum 1 mechanically by knowing the dimensions of both ends of the thin plate 9 immediately after casting during operation.

[Problems to be solved by the invention]

The present invention has been proposed in order to solve the above-mentioned problems, and has a simple and inexpensive structure, and continuous casting with a water-cooling drum that enables casting of thin plates with a very small dimensional difference in the width direction. Is to provide a machine.

[Means for solving problems]

As a means for achieving the above object, the present invention provides divided water cooling chambers in which the water cooling chambers in both water cooling drums are circumferentially separated into a plurality of rows, and cooling water is supplied to each of the divided water cooling chambers on the driving side and the driven side. It is characterized by the provision of a water supply channel and a drainage channel for alternately supplying and draining water. To explain this action, the cooling water that has been supplied from the water supply channel on the drive side and passed through the split water cooling chamber is drained from the drainage channel on the driven side, and the adjacent split water cooling chambers are supplied from the water channel on the driven side. Drain from the drive-side drain. In this way, the cooling water is allowed to flow in different directions alternately in the adjacent divided water cooling chambers to make the temperature distribution in the axial direction of the water cooling drum uniform.

That is, the present invention is a water-cooled drum device of a drum-type thin plate continuous casting machine, wherein molten steel is continuously supplied between a pair of parallel water-cooled drums, and solidified into a plate shape to continuously cast thin plates. The inside is divided into a plurality of water cooling chambers by partition walls that extend in the axial direction, and a water supply channel and a drainage channel are connected to both ends of the divided water cooling chambers so that the axial flow of the cooling water in the adjacent water cooling chambers is reversed. This is a water-cooled drum device for a drum type continuous thin plate casting machine.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a plan sectional view of a cooling device for a water cooling drum which is an embodiment of the present invention, and FIG. 2 is a front sectional view taken along the line II-II in FIG. In FIGS. 1 and 2, reference numeral 1 denotes a drum, to which an inner cylinder 12 is fixed, a drive shaft 2a is fitted to an end portion on a drive side D, and a driven shaft 2b is fitted to an end portion on a driven side W. On the driven side W of the inner surface of the inner cylinder 12, a partition wall 14 having a water supply hole at the center is formed, and on the drive side D, a partition wall 16 is formed.
Are attached, and the respective partition walls 14 and 16 are connected by nine drain pipes 15. Further, the partition wall 14 has its water supply hole and the water supply hole of the driven shaft 2b connected by a water supply pipe 13.

The space between the inner peripheral surface of the drum 1 and the outer peripheral surface of the inner cylinder 12 is divided into 18 equal parts in the circumferential direction by a partition plate 11, and a divided water cooling chamber 10 is formed. In addition, the water supply passage 17 is provided at both ends of the inner cylinder 12.
And drainage channels 18 are alternately perforated in the circumferential direction so as to penetrate through the inner cylinder 12 so that water is communicated between each of the divided water cooling chambers 10 and the inside of the inner cylinder 12. Each member constitutes a water cooling drum A.

The pair of water-cooling drums A are supported by bearings 3, and a mold part is formed by the gaps between the water-cooling drums A and side dams 7 slidably mounted on both side surfaces thereof. A fixed water supply port 5 is inserted into the water supply hole of the driven shaft 2b. Reference numeral 4 is a fixed pipe header, in which a groove is provided in the inner surface in the circumferential direction, a drain hole is bored, and a drain port 6 is fixed. And the drive shaft 2a is inserted in the inside.
As shown by the arrows, the pair of water cooling drums A continuously feed the molten steel 8 to the mold portion formed by the gap and the side dam 7 while rotating in mutually opposite directions to continuously cast the thin plate 9. On the other hand, as shown by the arrow, the cooling water is supplied from the water supply port 5 through the water supply hole of the driven shaft 2b, the water supply pipe 13, and the water supply passages 17 of the driven side W and the driving side D, respectively. Water to 10. And the drum 1 heated by the molten steel 8
The temperature of the driven side W through the drain pipe, and from the drain side 18 on the drive side D directly through the inside of the drive shaft 2a, and the drainage port via the header 4. Drain from 6.

At this time, the cooling water passes through each of the divided water cooling chambers 10 in the opposite direction, and the high temperature portion and the low temperature portion are alternately distributed in the circumferential direction of the driving side D and the driven side W of the drum 1. The average temperature is the same and the expansion dimension is the same.

[Effect of the present invention]

INDUSTRIAL APPLICABILITY As described in detail above, the present invention allows the cooling water to flow in different directions alternately in the divided water cooling chambers divided into a plurality of sections in the circumferential direction, so that the axial direction generated in the drum wall outside the same divided water cooling chambers. The temperature gradient of is reversed in each place, and the temperature gradient in the circumferential direction becomes uniform. As a result, the outer diameters of the driving side and the driven side of the water cooling drum become the same, so that the clearance between the driving side and the driven side formed by the pair of water cooling drums becomes the same, and the plate thickness in the width direction becomes The effect is that it is possible to continuously cast a high-quality thin plate having a very small dimensional difference.

[Brief description of drawings]

FIG. 1 is a plan sectional view of a water cooling drum device which is an embodiment of the present invention, and FIG. 2 is a front sectional view taken along the line II-II in FIG. FIG. 3 is a broken plan view of a conventional water-cooled drum device, and FIG. 4 is a broken front view taken along line IV-IV in FIG.

Claims (1)

[Claims] 1. A water-cooled drum device of a drum-type thin plate continuous casting machine, wherein molten steel is continuously supplied between a pair of parallel water-cooled drums and solidified into a plate shape to continuously cast thin plates. Is divided into a plurality of water-cooling chambers by a partition wall extending in the axial direction, and a water supply channel and a drainage channel are connected to both ends of the water-cooling chambers so that the axial flow of cooling water in the adjacent water-cooling chambers is reversed. A water-cooled drum device for a drum-type continuous thin plate casting machine.