Vibration suppression device and suppression method after hot galvanized strip steel gets out of zinc pot

Abstract

The invention discloses a vibration suppression device and suppression method after hot galvanized strip steel gets out of a zinc pot. The vibration suppression device comprises an upper vibration suppression roll, an upper transverse movement mechanism, a lower vibration suppression roll, a lower transverse movement mechanism, an upper laser range finder, a lower laser range finder, an encoder and a PLC control system. The laser range finders are used for feeding back the surface position of the strip steel in real time. The PLC control system is used for carrying out difference calculation on the actual measured distance of the laser range finders and the set distance to determine the actual vibration amplitude of the strip steel. When the vibration amplitude of the strip steel exceeds aset threshold value, the transverse movement mechanisms drive the vibration suppression rolls to get close to the strip steel to suppress the vibration amplitude of the strip steel and limit the vibration amplitude within the set threshold value. The encoder is used for feeding the running speed of the strip steel in real time and controlling the rotating speed of the vibration suppression rollsto ensure that linear speed of the roll surfaces of the vibration suppression rolls is in line with the running speed of the strip steel and protect the surface of the strip steel against scratches. The vibration suppression device remarkably reduces the vibration amplitude of the strip steel, ensures the thickness uniformity of a galvanized layer of the strip steel, protects the surface of the strip steel against scratches and meets the requirements for production of high-quality galvanized strip steel.

Description

technical field [0001] The invention relates to the technical field of strip steel production, in particular to a device and method for suppressing vibration of hot-dip galvanized strip steel after leaving a zinc pot. Background technique [0002] The height of the galvanized steel strip in the hot-dip galvanizing production line from the galvanized pot to the top roller of the cooling tower is about 30 meters to 50 meters. There is no support in the middle, and the strip steel is prone to vibration during the upward process. The vibration peak value of the strip steel in the suspended part can reach 50mm. The vibration of the strip steel after it comes out of the zinc pot directly affects the thickness and uniformity of the galvanized layer, and the strip steel is easy to scratch the surface of the strip steel by the air knife during the vibration process. It has a great influence on the production of high-quality panels. [0003] In order to suppress strip vibration, some...

AI Technical Summary

Problems solved by technology

The vibration suppression effect of the electromagnetic damping device on thick-gauge strip steel is relatively poor, and it is difficult to meet the production needs

Therefore, there is an urgent need to design a vibration suppression device and suppression method after the hot-dip galvanized strip galvanizing pot to solve the uneven thickness of the galvanized layer caused by the vibration of the hot-dip galvanized galvanizing pot and the high cost of existing equipment and operational defects. The problem

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