Three-phase electromagnetic wiping device suitable for rod-shaped workpiece

Abstract

The invention discloses a three-phase electromagnetic wiping device suitable for a rod-shaped workpiece. The three-phase electromagnetic wiping device comprises a coil former and at least one group ofthree-phase coils, wherein a through hole is formed in the center of the coil former, the through hole can allow the rod-shaped workpiece to move upwards and penetrate therethrough, a liquid coatingis adhered to the surface of the rod-shaped workpiece, at least one group of three-phase coils are sequentially wound around the outer side of the coil former in the axial direction, when at least onegroup of three-phase coils are electrified, each phase coil generates an alternating magnetic field, at least one group of three-phase coils form a traveling wave magnetic field at the center of thecoil former, when the rod-shaped workpiece moves upwards in the through hole, under the action of the alternating magnetic field generated by each phase coil, a first electromagnetic force which is obliquely downwards is generated in an induction mode, a second electromagnetic force which is opposite to the movement direction of the rod-shaped workpiece is generated in an induction mode under theaction of the traveling wave magnetic field, the first electromagnetic force and the second electromagnetic force prevent the liquid coating from moving upwards, the adhesion force in the coating is overcome, the coating is compressed, and the surplus coating is wiped, so that the thickness of the coating of the rod-shaped workpiece is controlled. The device has a good wiping effect.

Description

technical field [0001] The invention relates to the technical field of hot-dip galvanizing, and more specifically relates to a three-phase electromagnetic wiping device suitable for rod-shaped workpieces. Background technique [0002] In the hot-dip galvanizing process of steel, the bar-shaped workpiece is sent into the zinc pot by the conveyor through the sinking roller, and a layer of zinc liquid adheres to the surface before being led out of the zinc pot. At this time, the galvanized layer on the surface of the rod-shaped workpiece is often too thick and uneven, and a wiping device is required to thin the zinc liquid coating on the surface of the rod-shaped workpiece to the required thickness, while ensuring that the coating is smooth and even, and wipe the excess zinc liquid back to the surface. zinc pot. The best effect in the traditional wiping process is the gas wiping method. The gas wiping method is to send a certain amount of gas into the air knife after compress...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to solve the technical problems of the existing electromagnetic wiping technology that the radial electromagnetic force is too large, the axial electromagnetic force is too small, and the efficiency of the single-phase electromagnetic wiping technology is low

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