JPH0336615B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a belt cooling device for a belt-type continuous casting machine.

[Conventional belt cooling device]

FIG. 1 shows a belt cooling device for a typical conventional belt-type continuous casting machine, and this is an open type cooling device whose main components include a water supply header 4, a scoop 5, and a drainage header 6. The static pressure of the molten steel 9 acting on the belt is supported by the knife edge support disk 3, and the cooling water that promotes the solidification of the molten metal is jetted out from the water supply header 4 to cool the belt 2 (indirectly melt the molten metal). cool the metal) and scoop 5
The water is scooped up by the drain header 6 and discharged outside the machine. In addition, in FIG. 1, 1 is a slab, 7 is a tundish, and 8 is a pulley.

[Disadvantages of the above conventional devices]

By the way, when increasing the size of the equipment or increasing the height of the machine, the static pressure of molten metal acting on the belt 2 increases in proportion to the increase in size. In a conventional continuous casting machine with an open cooling water system as shown in FIG. 1, the cooling water pressure acting on the belt 2, that is, the supporting force of the belt 2 is small. Therefore, the belt 2 has the drawback that it swells greatly toward the cooling water side due to metal static pressure, and the slab 1 also swells accordingly. In order to secure the required cooling capacity of the cooling water jetted from the water supply header 4, it is necessary to form an appropriate cooling water flow rate and water layer thickness, but since there is no mechanism to compensate for these, a large amount It has disadvantages such as the need for cooling water. In other words, the molten metal static pressure belt support means and cooling means of the conventional belt-type continuous casting machine do not pose any problem in use when the equipment is horizontal or has a small inclination angle, or when the production capacity of the equipment is small. The above-mentioned drawbacks occur when it becomes necessary to increase the height of the machine and also to increase the production capacity of the equipment.

[Object of the present invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a belt cooling device for a belt-type continuous casting machine that eliminates the drawbacks of the conventional devices described above.

[Configuration of the present invention]

The present invention, as a means for achieving the above object, consists in providing a belt cooling device with a plurality of sealed compartments so that the cooling water pressure can be adjusted for each compartment. In other words, in a vertical continuous casting machine with a belt cooling device installed on the back of a pair of mold belts, the casting belt is cooled by the side walls at both ends of the cooler body lid and the cooling zone partition plate that is in contact with the belt and slopes upward. The container is separated into upper and lower parts, and a plurality of coolers are installed along the casting belt, and each cooler has a cooler that extends to the side walls on both sides and maintains a constant distance from the belt to ensure a cooling water flow path. The cooling water flow path partition plate is fixed with a fixture at a distance from the cooler main body lid, and the fixtures are extended to both side walls to create a lower water supply level between the cooling water flow path partition plate and the cooler main body lid. Separated into a pressure chamber and an upper drainage equalization chamber,
This continuous casting machine is characterized in that a water supply pipe and a drain pipe equipped with a pressure regulating valve are connected to the water supply pressure equalization chamber and the drainage pressure equalization chamber.

The present invention is a so-called closed multiple cooling device, in which the static pressure of molten metal acting on a belt is supported by the pressure of cooling water, and the cooling device is divided into several parts in the casting direction (longitudinal), and the static pressure acting on the belt is The water pressure inside the cooling device can be adjusted to an appropriate value in accordance with the pressure distribution, and the required cooling effect can be obtained with a small amount of cooling water.

Hereinafter, the present invention will be explained in detail based on FIGS. 2 and 3. FIG. 2 is a sectional view of a belt cooling device in a belt-type continuous casting machine according to an embodiment of the present invention, and FIG. 3 is a view taken along the line A--A in FIG. This belt cooling device is a closed multiple type cooler, which includes a water supply header 13, a water supply branch pipe 14, a cooler main body lid 15, a wall side 16, a belt 12, a cooling water flow path partition plate 17, and a cooling zone partition plate. 18, a drainage branch pipe 19, a drainage header 20, and a cooling water pressure regulating valve 21 constitute one section, and two or more of these divisions are connected in the casting direction. The cooling water supplied to this cooler consists of a belt 12 that moves in synchronization with the slab 11, a side wall 16, a cooling zone partition plate 18, and a cooler main body lid 15.
It is separated from the atmosphere by Belt cooling water flow path 23
The cooling water pressure, that is, the belt supporting force, is controlled by the pressure regulating valve 21 in response to changes in the static pressure of the molten metal.
It can be arbitrarily adjusted for each section.

Further, the distance between the cooling water flow path partition plate 17 and the belt 12 is appropriately determined in order to obtain an appropriate cooling water flow rate and water layer thickness for cooling the belt 12.

To explain the operation of the cooler with the above configuration,
When the cooling water supplied from the water supply header 13 to each section passes through the water supply branch pipe 14 through the water supply pressure equalization chamber 22 and flows through the belt cooling water flow path 23, the water pressure supports the molten metal static pressure applied to the belt while supporting the belt. 12
The water is cooled and discharged outside the vessel through the drainage pressure equalization chamber 24, drainage branch pipe 19, drainage header 20, and pressure regulating valve 21. Since the coolers are arranged in multiple units, the belt cooling water pressure, that is, the belt support pressure, can be adjusted to an appropriate value by adjusting the opening degree of the pressure control valve 21 for each section in response to changes in the static pressure of the molten metal. can do.

In addition, the distance between the cooling water flow path partition plate 17 and the belt 12 is set to an appropriate value using a cooling box in which the partition plate 17 is used as a fixture or a cooling box in which the partition plate 17 is made variable (not shown). By this,
A cooling water flow rate and water layer thickness effective for belt cooling can be obtained with a relatively small amount of cooling water.

[Effects of the present invention]

As described in detail above, the present invention employs a closed multiple cooler for the belt cooling mechanism, so that the belt cooling water pressure is adjusted in each section in response to changes in the molten metal static pressure applied to the belt. (Belt support pressure) can be adjusted to an appropriate value, and thereby the bulge of the belt and the cast piece toward the cooling water side can be suppressed. In addition, by providing a partition plate that forms a cooling water flow path, the distance (channel) between the partition plate and the belt can be determined appropriately, and a relatively small amount of cooling water can achieve the cooling required for belt cooling. You can obtain the water flow velocity and water layer thickness, and also
This has the effect of preventing excessive overheating of the belt. Furthermore, in belt-type continuous casting machines, cooling in the mold (primary cooling) is important, but in the present invention, in particular, cooling intensity is increased,
Moreover, the effect of uniform cooling is also produced.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a belt cooling device of a typical conventional belt type continuous casting machine. FIG. 2 is a sectional view of a belt cooling device in a belt-type continuous casting machine that is an embodiment of the present invention, and FIG.
It is a view taken along the line A. 1, 11... Slab, 2, 12... Belt, 3...
...Knife Edge Support Disk, 4,13...
Water supply head, 5...Scoop, 6, 20...Drainage head, 7...Tandesh, 8...Pulley, 9
... Molten steel, 14 ... Water supply branch pipe, 15 ... Cooler main body lid, 16 ... Side wall, 17, 18 ... Partition plate, 1
9...Drain branch pipe, 21...Pressure control valve, 22...
Water supply equalization chamber, 23... Belt cooling water flow path, 24...
…Drain pressure equalization chamber.

Claims (1)

[Claims] 1. In a vertical continuous casting machine equipped with a belt cooling device on the back of a pair of mold belts, the cooling device is connected to the side walls at both ends of the casting belt cooler body lid and cooling zone partition plates that are in contact with the belts and slope upward. are separated into upper and lower parts, and a plurality of coolers are provided along the casting belt, and each cooler has a cooling tube that extends to the side walls on both sides and maintains a constant distance from the belt to ensure a cooling water flow path. The water flow path partition plate is fixed with a fixture at a distance from the cooler body lid, and the fixtures are extended to both side walls to equalize the downward water supply pressure between the cooling water flow path partition plate and the cooler body lid. 1. A continuous casting machine, which is separated into a chamber and an upper drainage pressure equalization chamber, and the water supply pressure equalization chamber and the drainage pressure equalization chamber are connected to a water supply pipe and a water supply pipe equipped with a pressure regulating valve.