Hot rolling laminar cooling device with inner driving plunger and inner driving method thereof

Abstract

The invention discloses a hot rolling laminar cooling device with an inner driving plunger and an inner driving method thereof. The hot rolling laminar cooling device comprises a cavity shell and a piston rod. One end of the piston rod is a fixed end, and the other end of the piston rod is a piston end. The outer wall of the fixed end is provided with a piston rod oil inlet. The piston end is arranged in a cavity of the cavity shell in a matched mode, and the cavity is divided into a front cavity and a rear cavity. The piston rod is internally provided with a piston rod oil cavity. One end ofthe piston rod oil cavity end communicates with the piston rod oil inlet, and the other end of the piston rod oil cavity is led to the piston end and communicates with the rear cavity. The rear end ofthe cavity shell is provided with a back cover. The front end of the cavity shell is provided with a combined sealing ring. The outer wall of the front end of the cavity shell is provided with a cavity oil inlet communicating with the front cavity. The invention further discloses an inner driving method. The cavity shell is driven in a hydraulic inner driving mode to move, then the laminar cooling width is controlled, and thus the defects such as resource waste, environment influence, high failure rate, mechanism jamming and low precision caused by traditional outer driving mechanisms are effectively overcome.

Description

technical field [0001] The present invention relates to laminar flow cooling equipment, and more particularly to an inner driving plunger for a hot rolling laminar cooling device and an inner driving method thereof. Background technique [0002] The production lines of hot rolling mills of domestic and foreign iron and steel enterprises all use laminar cooling devices. . [0003] Take a domestic 2050 hot-rolling mill as an example. With the continuous development, the production varieties and specifications have gradually expanded. The current product structure is completely different from the start-up time. At the beginning of the start-up, ordinary carbon steel is the main product. At present, it mainly produces micro-alloyed steel and carbon steel. Manganese steel. The existing laminar cooling system, with the continuous expansion of the rolling specifications of the rolling line and the continuous improvement of the user's product quality requirements, can no longer me...

AI Technical Summary

Problems solved by technology

[0009] Low precision: The shading plate of the linkage mechanism is easily deformed, which often causes the shading accuracy on both sides to fail to meet the requirements;

[0010] Stacked steel is vulnerable: when the laminar flow cooling section has a stacked steel failure, the connecting rod mechanism and the shielding plate are easily deformed or damaged;

[0011] No down-spray shielding: the linkage mechanism cannot be used for down-spray laminar flow cooling, without a down-spray laminar flow shielding device, the cooling of the upper and lower surfaces of the strip is uneven, which will also lead to a certain wave shape of the strip edge

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