A safe automatic steel loading positioning device and method for heating furnace

Abstract

The invention discloses a safe automatic steel-loading positioning device and a method for a heating furnace. The device comprises a laser range finder, a furnace-in roller way and a charging cantilever roller way. The method comprises the following steps: installing the laser range finder; feeding steel through the furnace-in roller way to the heating furnace at a speed of 1.2-1.5m / s and meanwhile enabling the a charging cantilever roller way in the furnace to run at a speed of 1.2-1.5m / s; starting the laser range finder to carry out positioning operation when the laser range finder senses that the head of a billet head passes through 2 / 3 of the length of the billet; determining the delayed time when most of the billet passes through the laser range finder according to the positioning distance and speed when the head of the billet head passes through 2 / 3 of the length of the billet, and judging whether almost billet passes through the laser range finder or not so as to reduce the speed of the furnace-in roller way and the charging cantilever roller way to 0.4m / s; and stopping the roller ways within a period of time delayed after the laser range finder senses that the tail of the billet departs, and finishing positioning. The device disclosed by the invention solves the problem that existing strokehold cold and hot metal detector which can be spuriously triggered by black smoke, mobile objects and the like easily cannot judge whether failures exist or not and cannot reliably ensure that the billet completely enters the furnace, and meanwhile, the positioning speedability and the safe reliability are improved.

Description

Technical field [0001] The invention relates to the technical field of steel rolling, in particular to a safe positioning device and method for automatic steel loading of a heating furnace. Background technique [0002] The heating furnace is the leader of the steel rolling production line. Whether the heating furnace can ensure safe and normal operation, whether it can achieve full automation, can heat up qualified billets, and whether the entire rolling line can be produced safely, continuously and smoothly. Has a crucial decisive role. [0003] In order to improve the automation level in the heating furnace, the prior art generally uses a cold metal detector in front of the furnace and an encoder fixed on the second cantilever roller table motor in the heating furnace to realize the positioning of the billet. When the tail of the billet passes in front of the heating furnace During cold inspection, the roller table is reduced from high speed to medium speed. At this time, the e...

AI Technical Summary

Problems solved by technology

Since the signal of the metal detector is a switch signal, when people walk, black smoke, or blowing objects when the wind blows, or there is no signal due to the line fusing and short circuit caused by the overheating of the heating furnace, it will cause certain safety hazards.

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