Gas circulation jet cooling device

Abstract

The invention discloses a gas circulation jet cooling device which comprises a cooling box, a circulating fan and an air duct, strip steel can pass through the cooling box in a closed manner, an upperspray box and a lower spray box are arranged at the upper side and the lower side of the passing position of the strip steel in the cooling box respectively, gas spray holes are evenly distributed inthe sides, facing the strip steel, of the upper spray box and the lower spray box, and a gas collecting box is mounted at the top of the cooling box in a communication manner. A heat exchanger is arranged at an inlet of the gas collecting box, an outlet of the gas collecting box is communicated with an inlet of the circulating fan, an outlet of the circulating fan is communicated with an inlet ofthe air duct, an outlet of the air duct is divided into two branches, and the two branches extend into the cooling box in a closed manner and are communicated with the upper spray box and the lower spray box respectively. The two branches are each divided into multiple small branches, the communicating positions of the tail ends of the small branches on the same branch are distributed in the width direction of the strip steel, and flow adjusting valves are arranged on the parts, located outside the cooling box, of all the small branches. The device is good in cooling effect, and the cooling uniformity of the strip steel in the width direction is improved.

Description

technical field [0001] The invention relates to a cooling device for continuous heat treatment strip steel, in particular to a gas circulation injection cooling device. Background technique [0002] After hot-rolling or cold-rolling, the strip steel needs to be heat treated. During the heat treatment, the strip steel is generally heated to 300°C-1000°C, kept warm and then cooled. At present, the gas circulation jet cooling device is generally used to cool the strip steel through protective gas, but the existing gas circulation jet cooling device has complex structure, narrow adjustment range of cooling capacity, poor cooling uniformity in the width direction of the strip steel, equipment installation, etc. complex and difficult to operate and maintain. Contents of the invention [0003] The object of the present invention is to provide a gas circulation jet cooling device, which cools the steel strip through the circulating gas of strong convective heat exchange, has a go...

AI Technical Summary

Problems solved by technology

At present, the gas circulation jet cooling device is generally used to cool the strip steel through protective gas, but the existing gas circulation jet cooling device has complex structure, narrow adjustment range of cooling capacity, poor cooling uniformity in the width direction of the strip steel, equipment installation, etc. Complicated, difficult to operate and maintain

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