Method and device for detecting and clearing sink roll slagging

Abstract

The present invention relates to a method for detecting and removing slagging of a sink roll in a cold rolling hot galvanizing device and a device therefor. The method for detecting and removing slagging is characterized in: the connecting end of a scraper rod and piston rod is equipped with a displacement sensor, and a top roll for transmitting strip belts is equipped with a revolution transmitter; the revolution transmitter measures the on-line speed of strip belts and transmits to a controller, the controller outputs the control speed of the scraper rod moving along the generatrix of the sink roll after calculation; the displacement sensor measures the vibration quantity and transmits to a controller, the vibration quantity is proportional to the thickness of the sink roll slagging, the controller outputs the control pressure of a scraper on the scraper rod to the sink roll, thus to removing the slagging on the sink roll. According to the invention, sensors are used for measuring the speed of the strip steel and the slagging speed of the sink roll, control the horizontal moving speed of the scraper and the pressure of the scraper to the sink roll, so that sink roll slagging is removed, and the abrasion of the sink roll and the scraper is reduced.

Description

(1) Technical field [0001] The invention relates to a sinking roll in cold-rolling hot-dip galvanizing equipment, in particular to a method and device for detecting and removing slagging on the sinking roll. (2) Background technology [0002] The sinking roll equipment is used in the zinc pot of the hot-dip galvanizing unit. The sinking roll is below the zinc liquid level, and the strip steel comes out of the zinc pot and reaches the top roll before output. The temperature of the zinc liquid in the zinc pot is about 460-600 ° C. The equipment immersed in the zinc liquid and the iron elements brought in by the strip steel form various alloy elements, and the alloy elements and zinc form various intermetallic compounds, thus forming Different zinc dross. Zinc slag is easy to slag on the sinking roll, and the slagging on the roll surface seriously affects the quality of the strip surface. Therefore, it is very necessary to clean the slagging on the roller surface in time and ...

AI Technical Summary

Problems solved by technology

[0005] (1) It is impossible to monitor the slagging on the roll surface. Whether the sinking roll is slagging can only be found by visually observing the roll marks on the strip steel. At this time, the quality defect of the strip steel has been caused, and once the slagging on the roll surface is difficult to remove;

[0006] (2) When carrying out alternate production of narrow material and wide material of strip steel, the slagging at both ends of the sinking roller is not easy to find, and once it is found, it is difficult to remove the slagging on the roller surface;

[0007] (3) The scraper adopts a high-pressure input operation mode. Since it is impossible to predict whether the roller surface will be slagged, the purposeless high-pressure input of the scraper will cause serious wear on the roller surface and the scraper;

[0008] (4) The moving speed of the scraper along the busbar of the sinking roller (that is, the level) cannot change with the change of the strip speed, which affects the use efficiency of the scraper, and the pressure of the scraper is artificially set temporarily

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