Medium plate laminar cooling chain edge part shading device control method

Abstract

A control method for a middle thickness plate laminar cooling chain edge masking device is disclosed, belonging to the field of rolling automatic control technology and comprising the following steps of: (1) determining a basic value MB of the amount of middle thickness plate laminar cooling chain edge masking; (2) correcting the masking amount with MB' being equal to MB.f(3); calculating the masking amount Mi of each group of opening manifolds; (4) implementing the masking amount of the single manifold; and considering that a masking baffle plate moves to a set masking location when a moving pulse Iact of the i group of manifold is equal to a target setting pulse Ind of the i group of manifold, in order to realize accurate positioning for the masking device of single group of manifold. The invention can achieve accurate control for the location of the edge masking baffle plate of the single group of manifold; a masking policy model takes parameters like thickness of steel plate, width of steel plate and cooling water amount into consideration, and has high model setting accuracy; the method can compensate and correct the system effectively and improve uniformity of controlling width temperature of the steel plate. The invention is suitable for hot-rolling middle thickness plate and laminar cooling device after rolling.

Description

technical field [0001] The invention belongs to the technical field of steel rolling automatic control, and relates to a method for controlling temperature uniformity in the width direction of a steel plate during the laminar flow cooling process of a medium-thick plate. Background technique [0002] Cooling uniformity control is an important issue in the controlled cooling process of medium and thick plates. In the width direction of the steel plate, in addition to the convective heat exchange between the cooling water of the upper header directly sprayed from the nozzle and the hot steel plate, there is also secondary cooling of the cooling water that flows laterally from the stagnant water on the upper surface of the steel plate, resulting in the water flow velocity at the lateral end of the steel plate The sharp increase produces a cooling effect that cannot be ignored. In addition, the lower cooling water falls back to both sides of the steel plate, aggravating the une...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of large temperature difference in the width direction of the steel plate in the cooling process after rolling, the present invention provides a control method for the chain-type edge shielding device of the medium-thick plate laminar flow cooling, and establishes a control method for the chain-type edge shielding device of the medium-thick plate , use the shadowing calculation model and self-learning model to realize the control of the edge shielding device to optimize the shielding width of the cooling steel plate and compensate the temperature difference between the edge and the middle, so as to realize the temperature uniformity control in the steel plate width direction during the medium and thick plate cooling process

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