A three-phase electromagnetic wiping device and hot-dip coating system for strip-shaped workpieces

Abstract

The invention belongs to the field of hot dipping, and particularly relates to a three-phase electromagnetic wiping device for a strip-shaped workpiece and a hot dipping system. The device comprises an electromagnetic wiping unit, wherein the electromagnetic wiping unit comprises a first magnetic field generator and a second magnetic field generator, wherein a magnetic pole of the first magnetic field generator is opposite to a magnetic pole of the second magnetic field generator; each of the first magnetic field generator and the second magnetic field generator comprises an iron core and at least one group of three-phase coils; each group of three-phase coils comprises an A-phase coil, a B-phase coil and a C-phase coil; and the A-phase coils, the B-phase coils and the C-phase coils are sequentially wound around protruding magnetic poles arranged on the iron cores. Compared with a three-phase electromagnetic wiping device with the main magnetic flux direction in the vertical direction,the main magnetic flux direction of the device is the normal direction perpendicular to the plane where the strip-shaped workpiece is located, so that the gradient change of the magnetic field in thetangential direction parallel to the strip-shaped workpiece is larger, generated tangential electromagnetic force is larger, and the wiping efficiency is improved.

Description

technical field [0001] The invention belongs to the field of hot-dip plating, and more specifically relates to a three-phase electromagnetic wiping device and a hot-dip plating system for strip-shaped workpieces. Background technique [0002] In the hot-dip galvanizing process of strip steel, the strip steel is sent into the zinc pot by the conveying device through the sinking roller and turned around. After a layer of zinc liquid adheres to the surface, it is led out of the zinc pot by the stabilizing roller. At this time, there is a thick and uneven layer of unsolidified zinc liquid layer attached to the surface of the strip steel. It is necessary to use a wiping device to thin the surface zinc liquid layer to the required thickness, and wipe the excess zinc liquid back to the zinc pot. to reduce production costs. The traditional wiping device is a gas wiping device. The principle of this device is that a certain amount of gas is compressed and sent into the air knife, an...

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Problems solved by technology

[0004] Aiming at the defects or improvement needs of the prior art, the present invention provides a three-phase electromagnetic wiping device and a hot-dip coating system for strip-shaped workpieces, which combine the shape characteristics of the strip-shaped workpiece and the requirements for coating wiping, and provide three-phase electromagnetic wiping equipment. The structure of the wiping device and the coil winding method are redesigned, and the relative position setting method between the electromagnetic wiping device and the strip-shaped workpiece is also redesigned, and a corresponding main magnetic flux direction perpendicular to the surface of the strip-shaped workpiece is proposed. The electromagnetic wiping device, the device has a large change in the magnetic field gradient in the tangential direction parallel to the strip-shaped workpiece, and the generated tangential electromagnetic force is relatively high. The technical problem of low wiping efficiency caused by the low axial electromagnetic force of the wiping device

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