Lower spraying laminar flow cooling device

Abstract

The invention discloses a lower spraying laminar flow cooling device. The device comprises a plurality of groups of lower spraying devices, wherein each group of lower spraying device comprises a collecting pipe, two plunger pipes, two plungers and two U-shaped covers; the collecting pipe is fixedly arranged along a direction vertical to the operation direction of strip steel; a plurality of goose neck spray pipes are uniformly distributed on the collecting pipe along the axial direction; the two plunger pipes are fixedly arranged above the two ends of the collecting pipe respectively, pass through the plurality of goose neck spray pipes which are uniformly distributed at the two ends of the collecting pipe respectively, divide the goose neck spray pipes into upper nozzles and lower spraypipes, and are communicated with the upper nozzles and the lower spray pipes of the goose neck spray pipes through a plurality of through holes; the two plungers are arranged in the two plunger pipesrespectively; the two U-shaped covers are covered outside the two plungers in a mode that openings are downward; and the plungers are connected with driving devices through the U-shaped covers, so that movement in the axial direction is realized, the through holes are blocked, and cooling water quantity is adjusted.

Description

technical field [0001] The invention relates to a laminar flow cooling device, in particular to a width-adjustable downward spray laminar flow cooling device used in hot rolling laminar flow cooling. 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 Baosteel 2050 hot rolling plant as an example, its laminar flow cooling device has a total of 76 sets of cooling headers (corresponding to the upper and lower sets). 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...

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Problems solved by technology

[0021] The object of the present invention is to provide a down-spray laminar flow cooling device, which can solve the problem of high water consumption in the existing device, and at the same time enable the cooling width of the laminar cooling water to be adjusted according to the strip width; According to the cooling process requirements of different widths of steel, the gap laminar flow corresponding to the lower surface of the strip channel width should be established to realize the corresponding change in the width of the laminar flow cooling area, so as to adjust the area of ​​cooling water in the direction of channel width and overcome the existing The laminar flow cooling system in the technology has uneven cooling distribution in the width direction of the strip, which reduces the temperature drop at the edge of the strip and ensures the uniformity of the strip shape, mechanical properties, temperature and phase transformation in the width direction

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