Water cooling system for steel plate quenching apparatus

Abstract

The invention provides a water cooling system for a steel plate quenching apparatus. The water cooling system is composed of a first water spraying device, a second water spraying device and a third water spraying device all arranged in a quenching tank, wherein the first water spraying device is arranged above the top of the upper surface of a steel plate at an inclined quenching position and composed of a plurality of first nozzles arranged at intervals along the edge of the top of the steel plate upper surface, the second water spraying device is arranged above the bottom of the upper surface of the steel plate at the inclined quenching position and composed of a plurality of second nozzles arranged at intervals along the edge of the bottom of the steel plate upper surface, and the third water spraying device is arranged below the lower surface of the steel plate at the inclined quenching position and composed of a plurality of third nozzles horizontally or vertically arranged at intervals along the steel plate lower surface. The water cooling system can take away considerable bubbles generated on the surface of the steel plate through washing in a short time, so quenching of the steel plate is more uniform, and quality defects of the quenched steel plate caused by different local cooling rates are avoided.

Description

technical field [0001] The invention relates to metallurgical machinery and equipment, in particular to a water cooling system for a steel plate quenching device used for heat treatment and quenching of extra-wide and extra-thick steel plates. Background technique [0002] After entering the 21st century, especially in recent years, with the rapid development of my country's nuclear energy, military industry, shipbuilding industry, thermal power generation, bridge construction, oil and gas development and transportation, automobiles and construction machinery and other industries, various specifications and high The demand for high-performance medium-thick plates and extra-thick plates is increasingly strong; especially the demand for extra-wide and extra-thick quenched plates is increasing. Based on the huge demand for special heat-treated plates in the current market, it is imminent to develop a fully automatic and efficient steel plate quenching device. In recent years, m...

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Problems solved by technology

[0005] The other is the swing bench structure. The crane places the heated steel plate on the horizontal swing bench above the quenching tank, and the swing bench rotates around one end, so that the swing bench drives the steel plate to swing downward in the quenching tank. Stop at about 45°, at this time the steel plate is completely submerged in the water tank, thus completing the quenching heat treatment process of the steel plate entering and exiting the water; the device can realize automatic production and fully meet the quenching heat treatment requirements of medium and heavy plates and special thick plates; however, With this quenching method, when the swinging table drives the steel plate to immerse in the quenching tank, a large number of air bubbles will be generated on the upper and lower surfaces of the steel plate, and these air bubbles are difficult to separate from the steel plate by buoyancy. It prevents the contact between the partial surface of the steel plate and the cooling water, making the cooling rate of these local surfaces different from other surfaces without air bubbles, which will affect the overall quality of the quenched steel plate

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