Medium plate on-line quenching inclined jet flow cooler

Abstract

The invention relates to cooling technology after the steel rolling production line in the metal processing field, in particular to a medium plate on-line quenching inclined jet flow cooler. The cooler consists of a box body, a damping plate, a cooling panel, nozzles and a water inlet flange; the coolers are arranged in a high-pressure quenching area before a controlled cooling process and between post-rolling conveying roller ways, and the coolers are also up and down symmetrically arranged and vertical to steel plates to be cooled; a plurality of rows of nozzles are obliquely distributed and staggered; and the height between the upper cooler and the steel plates are adjustable. The cooler has the characteristics that: the cooling range is large, the space between roller ways is not required, the width of the box body and the number of rows of nozzles of the cooler can be adjusted according to the space between roller ways and the cooling speed, the phenomenon that the warped steel plates are stuck between the gaps between the coolers and the roller ways is eliminated, and the steel plates are quickly and uniformly cooled so as to achieve the expected cooling effect.

Description

technical field [0001] The invention relates to the cooling technology after a steel rolling production line in the field of metal processing, in particular to an inclined jet flow cooler for on-line quenching of medium and thick plates. Background technique [0002] At present, for hot-rolled plate production lines, different cooling rates are usually required after rolling to obtain different microstructures and properties. For the quenching and cooling process of a type of medium and heavy plate, it is necessary to rapidly cool the rolled medium and heavy plate from 780 ° C to 950 ° C to below 500 ° C, and then use other cooling methods to cool it to the required temperature range. For the current cooling method, laminar flow cooling and roller quenching machine are commonly used. For laminar flow cooling, the water flow with a certain pressure is vertically impacted on the surface of the steel plate through dense nozzles to achieve cooling. The disadvantage of this typ...

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Problems solved by technology

The disadvantage of this kind of cooling is that the cooling water vertically impacting on the steel plate has poor fluidity in a short time, and it is easy to stay on the surface of the steel plate to form a vapor film, resulting in excessive boiling and heat transfer of water, resulting in uneven cooling

For a cooler of a roller quenching machine, the structure determines that the width of the cooler is relatively small, and the water flow will be sprayed onto the roller table when the width is increased. This kind of cooler can only be installed in the occasion where the distance between the rollers is relatively small, otherwise the steel plate will jam. The "jamming" phenomenon between the cooler and the roller table affects the operation of the production line

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