Device for preventing galvanized plate from sticking roller and method thereof

Abstract

The invention relate to a device for preventing a galvanized plate from sticking a roller and a method thereof. The device comprises a front guide plate, an air injection assembly, an upper guide plate and a lower guide plate, wherein the front guide plate is installed in the front of a working roller and supported by a bracket; the air injection assembly is installed at the lower part of the front guide plate; and the upper guide plate and the lower guide plate are installed at the back of the working roller. The device can ensure that the galvanized plate stably passes through the front guide plate to reach the working roller; the galvanized plate is blown by utilizing the air injection assembly so that an air cushion is formed between the galvanized plate and the working roller, therefore, the condition that the galvanized plate is stuck to the working roller, in particular a thin galvanized plate with the thickness of less than 0.7mm is stuck to the roller, can be effectively avoided.

Description

technical field [0001] The invention relates to a device and a method for preventing a galvanized sheet from sticking to a roll. Background technique [0002] When the galvanizing unit continuously galvanizes the steel coil, it first uses the uncoiler to uncoil the steel coil, and then uses the shearing machine to cut the head and tail of the steel coil. It is welded by a welding machine to ensure the continuous operation of the entire production line, and then enters the galvanizing furnace for annealing after the cleaning section, and then transfers it to the zinc pot to form an iron-zinc alloy on the surface. However, after the iron-zinc alloy is formed on the surface of the steel plate, the steel plate is cut by equipment such as skin pass machine and stretch leveler, and then the steel plate is cut through the roller table, the exit is turned to the pinch roller, and then the finished product is coiled by the coiler. Among them, the role of the outlet turning pinch rol...

AI Technical Summary

Problems solved by technology

Since the steel plate will be slightly deformed by the exit turning pinch roller after clamping the steel plate, and polyurethane can produce a certain viscosity in a certain environment, so when the galvanized steel plate below 0.7mm passes the exit turning pinch roller, The phenomenon of "sticking" rolls is very easy to occur, that is, the galvanized steel plate adheres to the roll surface without separation, so that the steel plate head cannot smoothly transition to the lower guide plate, and the steel plate head cannot smoothly enter the reel jaw, resulting in steel jamming failure

Since the galvanizing unit is a continuous production line, any part of the long-term failure shutdown can cause the shutdown of the entire unit, and the occurrence of jammed steel failures will directly lead to the shutdown of the entire unit; at the same time, because the annealing furnace of the unit is in The non-oxidation furnace is designed so that the flame of the burner burns directly, and it is extremely easy to cause the steel plate to be burnt after the shutdown, which leads to the expansion of the fault; The temperature of the steel plate is low, and the strip steel that enters the furnace has not yet reached the annealing temperature, so that the zinc layer of the steel plate soaked in the zinc pot is thickened, and zinc slag and zinc skin are formed on the surface. , correcting roller, and tension roller, the zinc slag and zinc skin will be embedded in the rubber lining layer of the roller, which will cause great damage to the roller

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