A metal plate and strip roller quenching flow partition control device

Abstract

The invention belongs to the technical field of heat treatment equipment for metal plates and strips, and discloses a roll-type quenching flow zone control device for metal plates and strips. The device includes the middle part water ring cover and the side part water ring cover; the middle part water ring cover is installed in the middle processing groove of the spiral roller behind the gap nozzle in the high-pressure cooling section of the roller quenching machine and the spiral roller behind the high-density nozzle; the side part water ring cover It is installed at the processing grooves at the 1 / 4 and 3 / 4 positions of the spiral roll width behind the gap nozzle in the high-pressure cooling section of the roll quenching machine. The device can effectively realize the uniform distribution of cooling water on the surface of the plate and strip, reduce the local uneven cooling caused by the deposition of cooling water, realize the orderly heat exchange on the surface of the plate and strip during the quenching process, and meet the high flatness of the metal plate and strip. High uniformity quenching production needs.

Description

technical field [0001] The invention belongs to the technical field of heat treatment equipment for metal plates and strips, and relates to a roll-type quenching flow zone control device for metal plates and strips. Background technique [0002] Metal sheet and strip heat treatment involves normalizing, quenching, tempering, controlled cooling, solid solution and other processes, among which quenching, controlled cooling, solid solution and other processes need to heat the metal sheet and strip to a certain temperature (generally ≥ 800 ℃) , using water cooling method to reduce the final cooling temperature of the process at a certain cooling rate, so as to achieve the purpose of improving the internal structure and structure of the metal and improving the performance. [0003] The heat treatment of metal plate and strip usually adopts roller hearth heat treatment furnace to complete the heating process, and adopts roller quenching machine to complete quenching, controlled co...

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Problems solved by technology

[0005] The existing spiral roller system in the high-pressure cooling section of the roller quenching machine has the following problems: 1) In order to realize the rapid discharge of the residual cooling water on the surface of the metal plate and strip to the edge, the spiral rollers spiral in opposite directions on both sides of the center line, and there is a hole in the center of the spiral roller. Processing tank, where the longitudinal water flow of the metal plate and strip is concentrated, which affects the uniformity of the water flow on the entire plate; 2) In order to improve the drainage efficiency of the water from the gap nozzle in the high-pressure cooling section of the roller quenching machine, the width of the spiral roll after the gap nozzle is 1 / 4 Drainage grooves are designed at the and 3 / 4 places, which affect the uniformity of flow in the width direction of the strips and cause problems in the shape of the strips after quenching

The above problems affect the uniformity of flow in the length, width and thickness direction of the metal sheet and strip roller quenching process, which in turn affects heat transfer and temperature drop, and ultimately affects the shape and performance uniformity of the sheet and strip quenching

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