Non-contact magnetic force balance-type clamping stabilizing device of strip steel

Abstract

The invention discloses a non-contact magnetic force balance-type clamping stabilizing device of strip steel. The device comprises supporting guide rails arranged on both sides of the strip steel, wherein the supporting guide rails are provided with a crossbeam; the crossbeam is provided with a strip steel notch; at least one first permanent magnet magnetic force adjuster is arranged beside the strip steel notch; the crossbeam is provided with at least one horizontally movable type second permanent magnet magnetic force adjuster, which is arranged inside the strip steel notch of the crossbeam in an operation state; and the first and second permanent magnet magnetic force adjusters are connected with vertical motion mechanisms. The non-contact magnetic force balance-type clamping stabilizing device has the advantages that: the device can be used in a continuous hot galvanizing production line to stabilize galvanized strip steel and has small volume and low energy consumption; moreover, the device can move freely left and right, back and forth and up and down, and is in an optimal operating position in the operation state; and the device does not influence the efficiency of the hot galvanizing production line.

Description

technical field [0001] The invention belongs to a strip steel stabilizing device on a strip steel continuous production line, in particular to a non-contact strip steel clamping and stabilizing device. Background technique [0002] In the continuous hot-dip galvanizing production line, the high-speed and high-pressure airflow generated by the air knife is used to blow the two surfaces of the galvanized strip to control the thickness of the galvanized layer. Steel distance achieved. Because the galvanized steel strip is affected by the strong air flow of the air knife and cooling fan, and due to the need for cooling the galvanized strip, the strip tens of meters above the air knife has no support, and the strip will vibrate at the air knife, while the air The irregular change of the distance between the knife and the steel strip seriously affects the quality of the galvanized steel strip coating. [0003] Since conventional contact stabilizers cannot be used for galvanized ...

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Problems solved by technology

However, due to the large power of the electromagnet and the need to adopt forced heat dissipation measures, the volume of the whole device is very large, resulting in a long distance between the stable point of the strip steel and the air knife, and the stable effect is not good.

[0008] Third, when the magnetic force of the magnet acts on the surface of the strip steel, in addition to being affected by the magnetic field strength of the magnet, the width of the strip steel, the thickness of the strip steel, and the distance between the strip steel and the magnet will all affect the magnetic force of the strip steel. The size of the magnetic force, especially the latter two, its small change can lead to a large change in the force of the strip, it is difficult to measure the stress of the strip simply by the output magnetic force

[0009] When the control system measures the effect of the stabilizing device, if the vibration of the strip steel is used as the standard and used as feedback to adjust the magnetic force, this method is effective under normal circumstances, but if there is a problem caused by the mechanical system or the shape of the strip steel plate When there is vibration that cannot be suppressed by the stabilizer, the magnetic force will output the maximum value and reach saturation. If the strip tension on the operation line is relatively small at this time, excessive magnetic force will have an adverse effect on the transmission system of the operation line.

[0010] Fourth, the air knife of the continuous hot-dip galvanizing production line and the zinc pot system under the air knife have complex structures, large volume and weight, and require regular maintenance and replacement

Since the strip stabilizing device is installed directly above the air knife, the strip stabilizing device must be completely or partially dismantled when maintaining and replacing the above equipment. Since the strip stabilizing device itself is relatively large in size and weight, when installed on the operation line After the strip stabilizer is installed, it will affect the working efficiency of the hot-dip galvanizing line

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