Laminar flow width-adjusting cooling device and control method thereof

Abstract

The invention relates to a laminar flow width-adjusting cooling device and a control method thereof. The laminar flow width-adjusting cooling device comprises a plurality of groups of spray pipe devices, and each group of spray pipe device comprises a collecting pipe, a screw rod and two pistons, wherein the middle part of the collecting pipe is provided with a water inlet pipe, and the collecting pipe is provided with a plurality of spray pipes which are evenly distributed; the screw rod is arranged in the center of the collecting pipe along the axial direction; and the two pistons are respectively arranged on the screw rod and can move in the collecting pipe along the length direction of the screw rod, and the external diameters of the pistons are matched with the internal diameter of the collecting pipe. According to the requirements of the cooling technique of the strip steel with different widths, the invention can be used for adjusting the area of cooling water along the width direction of a channel, thus reducing the temperature reduction of the side of the strip steel, and ensuring the uniformity of the profile shape, the mechanical performance, the temperature and the phase change of the strip steel along the width direction.

Description

technical field [0001] The invention relates to a cooling device, in particular to a cooling device with adjustable laminar flow width suitable for a metallurgical steel rolling production line. Background technique [0002] The laminar flow cooling device is used in the hot rolling and continuous rolling mill production lines of iron and steel enterprises. Its main function is to quickly cool the strip steel exported from finish rolling according to the target temperature set by coiling to ensure the product performance of the strip steel. [0003] Taking the hot rolling mill as an example, its laminar flow cooling device has a total of 76 sets of cooling headers (corresponding to one set of upper and lower). Among them, the first 68 groups are the main cooling section, and the last 8 groups are the refined cooling section. It is generally divided into several cooling zones, and each cooling zone has its own main cooling section and the cooling section of the fine cooling ...

AI Technical Summary

Problems solved by technology

This method adopts the method for shielding the edge of the laminar flow cooling header, and provides a solution to the problem that the temperature of the edge of the strip is greatly reduced, but there are also shortcomings in this method. Obviously, the shortcoming of this prior art is that : When producing narrow strip steel, a large amount of cooling water is wasted in vain, which is not conducive to the saving of production resources

[0010] The inventor envisages developing a laminar flow cooling device and cooling method, which can establish a gap laminar flow corresponding to the width of the strip channel according to the cooling process requirements of different widths of the strip, and realize the corresponding change in the width of the laminar flow cooling area. Thereby adjusting the area of ​​cooling water in the width direction of the channel, reducing the temperature drop at the edge of the strip, and ensuring the uniformity of the shape, mechanical properties, temperature and phase transition of the strip in the width direction; and the existing edge shielding technology Different, while achieving the same effect, it can also avoid the waste of cooling water resources. After online search, no identical or similar patented technology has been found so far.

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