Guide roller water-cooling circulating device for continuous cast rolling

Abstract

The invention discloses a guide roller water-cooling circulating device for continuous cast rolling. The guide roller water-cooling circulating device comprises a hollow roller, the two ends of the hollow roller are provided with a right end shaft head and a left end shaft head correspondingly, a water inlet pipeline and a water return pipeline are arranged in the right end shaft head, and the right end of the right end shaft head is connected with a two-way rotating joint; and a water inlet and a water return port are formed in the two-way rotating joint, the water inlet is connected with aninlet of the water inlet pipeline, the water return port is connected with an outlet of the water return pipeline, an outlet of the water inlet pipeline is connected with a water inlet shaft core, andthe water inlet shaft core extends into the hollow roller. According to the guide roller water-cooling circulating device, the structure of a water-cooling guide roller is simplified, the water-cooling guide roller is formed by modifying a scrapped cold roller, the roller surface made of materials is high in hardness and resistant to abrasion, chromium electroplating is not needed, the use cost is greatly reduced, the temperature of the improved roller surface is reduced to 40-50 DEG C from original 90-120 DEG C, the cooling speed of a cast-rolled plate is greatly increased, and the plate surface temperature is reduced to 75-85 DEG C from original 130-140 DEG C.

Description

technical field [0001] The invention relates to a water cooling circulation device for a guide roll for continuous casting and rolling. Background technique [0002] The existing water-cooled guide rolls of casting and rolling mills are generally made of 45# steel, and the surface is chrome-plated to obtain a high-quality wear-resistant surface. There is a color difference mark on the surface of the cast-rolled plate, which needs to be machined and sent out for chrome plating. At the same time, the water-cooled guide roll of this material is located at the core of the roll, and the cooling water stays in the guide roll for a long time due to the small water pressure difference, making the roll The surface temperature reaches 100-120°C, while the temperature of the cast-rolled plate to this place is 190-220°C. Because the temperature difference between the guide roll and the cast-rolled plate is too small, the heat conduction effect is poor, so that the temperature of the cas...

AI Technical Summary

Problems solved by technology

[0002] The existing water-cooled guide rollers of casting and rolling mills are generally made of 45# steel, and the surface is chrome-plated to obtain a high-quality wear-resistant surface. There is a color difference mark on the surface of the cast-rolled plate, which needs to be machined and sent out for chrome plating. At the same time, the water-cooled guide roll of this material is located at the core of the roll, and the cooling water stays in the guide roll for a long time due to the small water pressure difference, making the roll The surface temperature reaches 100-120°C, while the temperature of the cast-rolled plate to this place is 190-220°C. Because the temperature difference between the guide roll and the cast-rolled plate is too small, the heat conduction effect is poor, so that the temperature of the cast-rolled plate after passing through the water-cooled guide roll still reaches 130-150°C, resulting in uncoiling adhesion of cast-rolled coils, which seriously affects the quality of cast-rolled sheets and the production efficiency of cast-rolled coils

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