Cooling water supply system and its buffer water supply method

Abstract

The invention relates to a cooling water supply system and a buffer water supply method thereof. The system comprises a fast cooling water tank, fast cooling collecting pipes, a fast cooling water supply pump, a speed regulating device and a fast cooling overflow pipe, wherein the fast cooling water tank is communicated with a laminar flow water tank through a laminar flow overflow pipe; the fast cooling collecting pipes are communicated with the fast cooling water tank through a fast cooling water supply pipe; the fast cooling water supply pump is arranged on the fast cooling water supply pipe; the speed regulating device is arranged between the fast cooling water supply pump and a motor and communicated with a hot rolling production line through a logic circuit; one end of the fast cooling overflow pipe is arranged in the fast cooling water tank, and the other end extends into a water return groove. The method comprises steps as follows: the laminar flow water tank and the fast cooling water tank are filled with cooling water; when the hot rolling production line transmits a flying shear loading signal, the speed regulating device performs speed increase regulation; when the head part of band steel on the hot rolling production line is close to the first fast cooling collecting pipe, a spray nozzle of the fast cooling collecting pipe is opened; when the tail part of the band steel leaves the last fast cooling collecting pipe, the speed reducing regulation is performed. The system and the method can meet requirements of the hot rolling production line for water supply amount and water pressure under the ultra-fast cooling process condition.

Description

technical field [0001] The invention relates to the technical field of hot strip steel rolling, in particular to a cooling water supply system and a buffer water supply method thereof. Background technique [0002] The controlled cooling technology of hot-rolled strip steel based on ultra-fast cooling as the core, combined with the original laminar flow cooling system of the rolling line, can adopt more and more effective means to give full play to fine-grain strengthening, precipitation strengthening, phase transformation strengthening, etc. The joint effect of various strengthening mechanisms can realize the high efficiency, reduction, intensification and high-grade products of the hot-rolled strip rolling process. Reflected in the reduction of alloy composition, on the premise of maintaining or improving the plastic toughness and performance of the material, it can save more than 20%-30% of the main alloying elements of steel, saving energy and reducing emissions, and imp...

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Problems solved by technology

[0004] The embodiment of the present application provides a cooling water supply system and its buffer water supply method, which solves or partially solves the technology that the water supply system of the hot rolling production line in the prior art may not be able to meet the requirements for water volume and water pressure under the ultra-fast cooling process conditions The problem is to realize the use of the original laminar flow water supply system and reduce the new water system, so that the smaller water system capacity can meet the requirements of large flow in the rolling process. Water replenishment is completed during the intermittent period of rolling, so as to meet the continuous production of the normal rolling process of the hot rolling production line, and at the same time achieve the effect of energy saving

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