Vapor cooling system for use in offline heat treatment of thin medium and thick plates

Abstract

The invention discloses a vapor cooling system for use in offline heat treatment of thin medium and thick plates, which comprises a water supply system, an air supply system, vapor spray nozzles and a control system, and is characterized in that: the vapor spray nozzles are symmetrically arranged above and below a rollway gap along the conveying rollway, the upper spray nozzle and an upper rollway are fixed on a movable upper frame, and the lower spray nozzle is fixed on a fixed frame; the water and air supply systems are led into the vapor spray nozzles by a shunt water collecting header anda shunt air collecting header respectively; a water supply pipe is provided with a valve, a flow meter and a regulating valve and is used for providing stable and reliable cooling water into an innerwater storage cavity in the spray nozzle from the side of the spray nozzle; and the control system consists of an experience management system and a PLC system, the experience management system makesa vapor cooling policy and cooling procedure and sends the cooling procedure to the PLC system to execute the cooling procedure, and the PLC system realizes the regulation of the intensity of coolingof the spray nozzle and the regulation of the state of water spraying. The vapor cooling system can solve the nonuniform cooling problem aroused by the high-pressure water jet cooling in the conventional thin medium and thick plate offline quenching.

Description

technical field [0001] The invention belongs to the technical field of heat treatment equipment and technology, and relates to a steam-mist cooling system for off-line heat treatment of thin-sized medium-thick plates. Background technique [0002] At present, the off-line quenching (solid solution) of thin and medium-thick plates (4mm~8mm) mainly adopts water quenching, and high-pressure water jets are used to impact the surface of the steel plate to produce enhanced heat transfer effects. This cooling method has great instantaneous cooling intensity for thin-gauge steel plates, which is prone to uneven cooling and plate shape problems, which reduces the qualified rate of finished products and increases the difficulty of production process control. At the same time, vapor-mist cooling has been widely used in various fields of the metallurgical industry. Mist cooling is mostly used in the cooling of the secondary cooling section of the slab continuous casting machine and the...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a steam-mist cooling system for off-line heat treatment of thin and medium-thick plates, which has good atomization effect, good cooling uniformity, wide adjustment range of cooling intensity, precise control of cooling parameters, and can provide cooling strategies, which can solve the problem of current thin and thick plates. Non-uniform cooling and plate shape problems caused by high-pressure water jet cooling for off-line quenching (solid solution) of medium and thick plates

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