JPS6238743A - Water cooling drum device of drum type continuous casting machine for thin sheet - Google Patents

Abstract

PURPOSE:To make the sheet thickness uniform in a transverse direction by providing divided water cooling chambers in a water cooling drum and alternately feeding and discharging cooling water to and from the respective divided water cooling chambers from a driving side and driven side. CONSTITUTION:The space between the inside peripheral surface of the drum 1 and the outside peripheral surface of an inside cylinder 12 is formed to the plural divided cooling chambers 10 by partition plates 11. Water feed paths 17 and drain paths 18 are alternately bored to both ends of the cylinder 12 in the peripheral direction. The cooling water is fed from a water feed port 5 through a water feed pipe 13 and the water feed path 17 to the divided water cooling chambers 10. The cooling water cools the drum 1 heated by a molten steel land is heated up by the drum. The cooling water is then drained through the respective drain paths 18 and a manifold 4 from a drain port 6. The driving side D and driven side W of the drum 1 are alternately distributed with high-temp. parts and low-temp. parts and the average temp. and expansion size on both sides are made the same. The difference in the sheet thickness size in the transverse direction is decreased and the sheet thickness is made uniform by the above-mentioned method.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water-cooled drum in a drum-type continuous sheet casting machine.

[Conventional technology]

A water-cooled drum device in a conventional drum-type thin plate continuous casting machine will be explained based on FIGS. 3 and 4. FIG. 3 is a cutaway plane view of the same device), and FIG. 4 is a cutaway front view taken along line NN in FIG. 3. The conventional water-cooled drum device
As shown in Fig. 4, the molten steel is poured into the mold part consisting of a pair of drums 1 and side dams 7 rotating in the direction of the arrow 1 □
In order to cool the drum 1' which is heated by the high-temperature molten steel 8 during the continuous casting of the thin plate 9, a hollow shaft 2 supported by a bearing 3 is installed as shown by the arrow. from the water supply pipe 5 inserted into the water cooling chamber 10
Cooling water is sent to. Then, the drum 1 fitted on the hollow shaft 2 is cooled, and the water is discharged from the drain port 6 through the space formed by the outer surface of the supply pipe 5, the hollow shaft 2, and the inner surface of the fixed outer pipe 4. do. Above drum 1 and hollow shaft 2
The outer pipe 4, the water supply pipe 5, and the drain port 6 constitute a water-cooled drum.

In the conventional device described above, the cooling water absorbs the high heat of the drum 1 while passing through the water cooling chamber 10, raises its temperature, and is discharged. It has the disadvantage that the degree of cooling is lower than that of the drive side, resulting in a considerable temperature difference, that is, a size difference in expansion.

Furthermore, since the outer diameter of the driven side W of the drum 1 is larger than that of the driving side, the clearance formed by the pair of drums 1 is narrower on the driven side W, and the gap in the width direction of the thin plate 9 to be cast is narrower. There was a problem that caused a difference in plate thickness. Even if you try to adjust the thickness of the thin plate 9 to be cast by widening the gap on the left side before operation in anticipation of the difference in thermal expansion of the drum 1 due to the operation of this conventional device, it is difficult to adjust the thickness of the thin plate 9 to be cast. It is difficult to respond to changes in thermal expansion, and in order to mechanically adjust the gap between the drums 1 by sensing the dimensions of both ends of the thin plate 9 immediately after casting during operation, the equipment would be expensive. Become.

[Problem that the invention seeks to solve]

The present invention was proposed in order to solve the above-mentioned problems, and has a simple and inexpensive structure, and is a continuous casting system equipped with a water-cooled drum that enables casting of thin plates with extremely small dimensional differences in the width direction. The aim is to provide an opportunity.

[Means for Solving the Problems] As a means for achieving the above object, the present invention provides a divided water cooling chamber in which the water cooling chambers in both water cooling drums are divided into a plurality of strips in the circumferential direction, and a divided water cooling chamber in each of the same divided water cooling drums. It is characterized by providing a water supply channel and a drainage channel for alternately supplying and discharging cooling water to the chamber from the drive side and the driven side. To explain this effect, cooling water is supplied from the drive side water supply channel, passes through the divided water cooling chamber, and is drained from the driven side drainage channel, and water is supplied to the adjacent divided water cooling chamber from the driven side water supply channel. Discharge from the drain on the drive side. In this way, the cooling water is passed alternately in different directions in the adjacent divided water cooling chambers to equalize the temperature distribution in the axial direction of the water cooling drum.

That is, the present invention provides a water-cooled drum device for a drum-type continuous thin plate casting machine that continuously supplies molten steel between a pair of parallel water-cooled drums, solidifies it into a plate shape, and continuously casts a thin plate. It is characterized by comprising a divided water cooling chamber that divides the water cooling chamber into multiple strips in the circumferential direction, and a water supply channel and a drainage channel that alternately supply and drain cooling water from the driving side and the driven side to each of the divided water cooling chambers. 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 based on FIGS. 1 and 2. FIG. 1 is a plan view of a cooling device for a water-cooled drum according to an embodiment of the present invention, and FIG.
It is a front broken section view immersed in a line. 1 and 2, reference numeral 1 denotes a drum to which an inner cylinder 12 is fixed, a drive shaft 2a is fitted at the end on the driving side, and a driven shaft 2b is fitted at the end on the driven side W. In FIG. On the driven side W of the inner surface of the inner cylinder 12, there is a partition wall 14 with a water supply hole bored in the center, and on the drive side there is a partition wall 14.
6 are respectively attached, and each partition wall 14, 16 is connected by nine drain pipes 15. Further, the water supply hole of the partition wall 14 and the water supply hole of the driven shaft 2b are 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, thereby forming a divided water cooling chamber 10. Additionally, water supply channels 17 are provided at both ends of the inner cylinder 12.
and drainage channels 18 are perforated through the inner cylinder 12 at alternate locations in the circumferential direction, so that water can flow between each divided water cooling chamber 10 and the inside of the inner cylinder 12. Each member constitutes a water-cooled drum A.

A pair of water-cooled drums A are supported by bearings 3, and a mold part is formed by a gap between the respective water-cooled drums and a side dam 7 slidably installed on both sides thereof. A fixed water supply port 5 is inserted into a water supply hole of the driven shaft 2b. Reference numeral 4 denotes a fixed pipe header, which has a groove provided in the circumferential direction on its inner surface, a drain hole drilled therein, and a drain port 6 fixedly provided. A drive shaft 2a is inserted inside it. As shown by the arrows, the pair of water-cooled drums rotate in opposite directions and continuously supply molten steel 8 to the mold section formed by the gap between them and the side dam 7, thereby continuously casting a thin plate 9.

On the other hand, cooling water is supplied from the water supply port 5 to the driven shaft 2 as shown by the arrow.
Each divided water cooling chamber 1 is connected to each divided water cooling chamber 1 via the water supply hole b, the water supply pipe 13, and the respective water supply channels 17 on the driven side W and the drive side.
Supply water to 0. Then, the drum 1 heated by the molten steel 8 is cooled and raised in temperature, and from the drain passage 18 on the driven side W goes via a drain pipe, and from the drainage passage 18 on the driving side directly passes through the inside of the drive shaft 2a. , drains water from the drain port 6 via the header 4.

At this time, the cooling water passes through each divided water cooling chamber 10 in the opposite direction one by one, and high temperature areas and low temperature areas are alternately distributed in the circumferential direction of the driving side and driven side W of the drum 1, and The average temperature will be the same and the expansion dimensions will be the same.

[Effects of the present invention]

As described in detail above, the present invention provides cooling water that alternately flows in different directions through the divided water cooling chamber divided into a plurality of strips in the circumferential direction. The effect is that the temperature gradient in the direction is reversed at each location, and the temperature gradient in the circumferential direction is made uniform. As a result, the outer diameter dimensions of the driving side and driven side of the water-cooled drum are also the same.
As a result, the gap size between the driving side and the driven side formed by the pair of water-cooled drums is also the same, making it possible to continuously cast high-quality thin plates with extremely small differences in plate thickness in the width direction. It is something.

[Brief explanation of drawings]

FIG. 1 is a cutaway plan view of a water-cooled drum device according to an embodiment of the present invention, and FIG. 2 is a cutaway front view taken along the line ■-■ in FIG. FIG. 3 is a cutaway plan view of a conventional water-cooled drum device, and FIG. 4 is a cutaway front view taken along the line N-NflAK in FIG. Sub-agents 1) Clearance agent Ryo Hagiwara - Sub-agent Atsuo Anzai Figure 2 Figure 3 Procedural amendment (method) % formula % 1. Indication of the case 1985 Patent Application No. 175791 2・Title of the invention: Water-cooled drum device 3 in a drum-type thin plate continuous casting machine, Relationship with the amended case Patent applicant: 11 Address: 2-5-1-4 Marunouchi, Chiyoda-ku, Tokyo
Voice PJ! Person 11 Location Toranomon-chome, Minato-ku, Tokyo 16-2 No. 2 Drawing subject to amendment Contents of amendment A The drawing will be corrected as shown in the attached sheet.

Claims (1)

[Claims] In the water-cooled drum device of a drum-type thin plate continuous casting machine, which continuously supplies molten steel between a pair of water-cooled drums parallel to each other and solidifies it into a plate shape to continuously cast thin plates, the water-cooled chamber in the drum is Drum-type thin plate continuous casting characterized by comprising divided water-cooling chambers separated into multiple strips in the direction, and a water supply channel and a drainage channel for alternately supplying and draining cooling water from the driving side and the driven side to each of the divided water-cooling chambers. Water-cooled drum device in the machine.