High-pressure-water descaling box

Abstract

The invention discloses a high-pressure-water descaling box. The high-pressure-water descaling box comprises a descaling box body, wherein a conveying roller and a sealing roller are arranged in the descaling box body; an upper jet nozzle assembly and a lower jet nozzle assembly are arranged in the descaling box body and are correspondingly positioned at two sides of a rolling line; the upper jetnozzle assembly comprises a jet nozzle set A, a jet nozzle set B and a jet nozzle set C which are distributed from top to bottom in the height direction of a steel frame; the steel frame is obliquelyfixed to a framework in the descaling box body, and the steel frame in the length direction is vertical to the rolling line; the jet nozzle set A, the jet nozzle set B and the jet nozzle set C comprise a plurality of jet nozzles which are mounted at intervals on the same straight line in the steel frame length direction. The high-pressure-water descaling box has the beneficial effects that the three jet nozzle sets with different jetting distance are arranged; the jet nozzle with the proper jetting distance and the high-pressure-water jetting pressure are selected based on a steel strip with different thickness, thus the effect of impacting oxide scales can be obviously improved, and as a result, the oxide scales removing rate can be increased, and the quality of the surfaces of subsequenthot-rolled boards can be ensured.

Description

technical field [0001] The invention relates to the technical equipment field of steel strip descaling, in particular to a high-pressure water dephosphorization box. Background technique [0002] Before the hot-rolled plate is sent to the finishing mill, high-pressure water descaling is required to prevent scale from being pressed into the steel strip. Usually, the high-pressure water descaling adopts a fixed nozzle steel belt distance and a fixed injection pressure. In the case of a single variety, there is no problem. However, with the diversification of hot-rolled products, the variation range of steel strip thickness increases significantly, and the same pressure is used for spraying steel strips of different thicknesses. When the thickness of the entrance steel strip becomes thinner, the spraying distance increases, resulting in shock The descaling effect is reduced. At present, there are also studies on hydraulically driven adjustable nozzles, such as patent Z2014106...

AI Technical Summary

Problems solved by technology

Using a hydraulic drive to drive the nozzle up and down is an optional solution, but the nozzle drive is easily damaged, because the inside of the descaling box is a harsh environment with high temperature and high humidity, and the service life of any mechanical parts inside it will be significantly reduced. In view of The hot rolling production line is a continuous and uninterrupted production line, and it is not advisable to use mechanical lifting drive mode

Before the steel strip enters the finishing mill, the oxide scale on the surface of the steel strip needs to be removed. For this reason, the surface of the steel strip needs to be washed with high-pressure water. The equipment used is a high-pressure water descaling box. Usually, the high-pressure nozzle of the descaling box and the steel strip The distance between them is constant, and the injection pressure is also fixed, but when the thickness of the steel strip changes greatly, the descaling effect cannot be guaranteed. Therefore, the distance between the high-pressure nozzle and the steel strip must be adjustable and driven by a hydraulic drive device. Moving the nozzle up and down is an optional solution, but the nozzle driving device is easily damaged, because the interior of the descaling box is a harsh environment with high temperature and high humidity, and the service life of any mechanical parts inside it will be significantly reduced. In view of the fact that the hot rolling line is For a continuous and uninterrupted production line, it is not advisable to use mechanical lifting drive mode

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