JPS6245806Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a secondary cooling device in continuous casting equipment.

In the secondary cooling zone of continuous casting equipment, that is, in the area below the mold where the slab is supported and guided by guide rollers, etc., and where spray cooling water is directly injected onto the slab to cool the slab, Guide rollers in close proximity are often indirectly cooled by splashes or splashes of spray water from the slab. Therefore, as the spray cooling water becomes narrower, the amount of splashed water and droplets decreases, resulting in insufficient cooling of the guide rollers.
This may cause the bearing to seize, causing the guide roller to become unable to rotate and lose its function. If the diameter of the guide roller is large enough,
It is also possible to directly cool the mold by running dedicated cooling water inside it, but the upper guide roller near the mold has a narrow spacing between the rollers and cannot be enlarged due to diameter restrictions, so direct cooling is not possible. Since this is not possible and indirect cooling has to be used as described above, the conventional secondary cooling device has the drawback that the guide roller may lose its function as described above.

The present invention eliminates the drawbacks of the conventional device described above, and even if the spray water for cooling the slab is throttled or shut off, the system prevents the temperature of the guide roller from rising and prevents the bearing from seizing. This was proposed for the purpose of providing a secondary cooling device in casting equipment, and it consists of an inner tube equipped with a branch pipe with a spray nozzle at the tip facing each guide roller of the secondary cooling device in continuous casting equipment. Continuous casting characterized in that a spray nozzle facing the gap between adjacent guide rollers is arranged almost concentrically within an outer pipe equipped with a branch pipe at the tip, and the inner and outer pipes are connected to a cooling water source. This relates to the secondary cooling device in the facility.

Hereinafter, according to the embodiment shown in FIGS. 1 and 2,
The present invention will be explained in detail. In those figures,
1 is an outer tube; 2 is a small-diameter inner tube fitted approximately concentrically into the outer tube 1; both tubes 1 and 2 are connected to a cooling water source (not shown). 4 is a branch pipe whose one end is fluid-tightly attached to the outer tube 1 such that one end communicates with the inside of the outer tube 1 and the spray nozzle 5 attached to the other end faces the gap between adjacent guide rollers 8. Cooling water supplied from a cooling water source into the outer pipe 1 is sprayed from spray nozzles 5 of these branch pipes 4 to cool the slab 3 pulled out from the mold (not shown). . 6 has one end communicating with the inner tube 2 and the other end extending fluid-tightly through the outer tube 1 so that a spray nozzle 7 attached to the extending end faces each guide roller 8. In the branch pipes attached to the inner pipe 2, cooling water supplied from a cooling water source to the inner pipe 2 is sprayed from a spray nozzle 7 of each branch pipe 6 to cool each guide roller 8. In addition, each branch pipe 6 of the inner pipe 2
is fixed to the outer tube 1 by welding, and also serves to hold the inner tube 2 substantially concentrically within the outer tube 1. Furthermore, 9 is a frame that supports the guide roller 8.

One embodiment of the device of the present invention is constructed as described above, and even if the spray water to the slab 3 is throttled or shut off, each guide roller 8 is connected to the branch pipe 6.
Since it is constantly cooled with cooling water from the spray nozzle 7, there is no possibility that it will become unable to rotate, unlike conventional devices.

Since the device of the present invention has the above-described structure and function, (1) each guide roller 8 is Since the guide rollers 8 are directly cooled from behind, there is no possibility that each guide roller 8 will seize and lose its function.

(2) The guide roller's cooling hydrogen inner tube 2 is arranged almost concentrically within the slab cooling hydrogen outer tube 1, making it a compact double-tube structure that can be easily installed in a narrow space below the mold. Not only that, but the cost is also low.

The following practical effects can be mentioned.

[Brief explanation of the drawing]

The attached drawings are schematic illustrations of one embodiment of the present invention.
FIG. 1 is a longitudinal sectional view, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1. 1: Outer pipe, 2: Inner pipe, 3: Slab, 4, 6: Branch pipe, 5, 7: Spray nozzle, 8: Guide roller, 9: Support frame.

Claims (1)

[Scope of utility model registration request] The inner tube has a branch pipe with a spray nozzle at its tip facing each guide roller of the continuous casting equipment's secondary cooling device, and the outer tube has a branch tube with a spray nozzle at its tip facing the gap between adjacent guide rollers. A secondary cooling system for continuous casting equipment, characterized in that the inner and outer pipes are arranged almost concentrically in the continuous casting equipment, and the inner and outer pipes are connected to a cooling water source.