An annular jet cooling device for controlled cooling of hot-rolled seamless steel pipes

Abstract

An annular jet cooling device for controlled cooling of hot-rolled seamless steel pipes, including an upper half water spray ring and a lower half water spray ring, both of which have the same structure and are arranged symmetrically, and are respectively connected with the shunt water collection pipe, and the water spray ring is connected with the shunt. A regulating valve group is connected between the water collecting pipes to control the water spray flow and water pressure; a water inlet is provided on the outer surface of the water spray ring, and cooling nozzles are provided on the inner surface of the water spray ring. The number of cooling nozzles is several and orderly distributed; on the upper and lower A cooling compensation nozzle is installed at the side end of the middle fitting surface of the lower half of the water spray ring; the jet direction of the cooling nozzle has an angle with the running direction of the steel pipe, and the jet direction is toward the forward or reverse direction of the running direction of the steel pipe. The present invention can be implemented on conventional hot-rolled seamless steel pipes of any diameter by independently setting the water spray flow rate of the upper and lower half water spray rings, and by setting parameters such as the number of openings of the water spray ring, water pressure, etc. Controlled cooling, the final cooling temperature can be precisely controlled, with stronger applicability and significantly improved cooling uniformity.

Description

technical field [0001] The invention belongs to the technical field of production of hot-rolled seamless steel pipes, in particular to an annular jet cooling device for controlled cooling of hot-rolled seamless steel pipes. Background technique [0002] For a long time, due to the particularity of the production process and the complexity of the annular section, compared with hot-rolled plates, profiles, rods and wires, hot-rolled seamless steel pipes lack controlled rolling and cooling technology in the rolling production process, and thus Effective organizational performance regulation cannot be achieved. In order to improve the microstructure and mechanical properties of hot-rolled seamless steel pipes, currently we can only rely on the addition of alloying elements or the subsequent off-line heat treatment process, resulting in a significant increase in production costs and a decrease in production efficiency. If the on-line controlled cooling after hot-rolling of the p...

AI Technical Summary

Problems solved by technology

[0011] However, it is difficult to accurately control the final cooling temperature due to the poor controllability of the swirling water in the cooling process when the steel pipe is cooled by the scouring action of the swirling water flow.

Images