Hot rolling strip steel double-ring control laminar flow cooling system

A double-loop control and laminar cooling technology, applied in the direction of temperature control, can solve the problems of inability to effectively control the cooling time history and inability to effectively control the cooling rate

Inactive Publication Date: 2008-02-20
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned hot-rolled strip single-loop control laminar flow cooling system cannot effectively control the cooling time history, that is, the cooling rate cannot be effectively controlled

Method used

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  • Hot rolling strip steel double-ring control laminar flow cooling system
  • Hot rolling strip steel double-ring control laminar flow cooling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The hot-rolled strip double-loop control laminar flow cooling system includes: water spray groups arranged above and below the steel strip 1 along the output roller table (the 1st to 15th water spray groups are arranged in sequence along the running direction of the steel belt on the output roller table), It is used to control the controller of each water spray group, the front-end thermometer and the rear-end thermometer respectively arranged at the front and rear ends of the water spray group, and the system also includes an intermediate thermometer arranged between the front and rear-end thermometers; The thermometer is a thermometer for testing the temperature of the steel strip, and the output end of the thermometer is connected to the controller; the middle thermometer is set between the 9th water spraying group and the 10th water spraying group.

[0025] The control loop of the system is divided into the first single closed-loop loop and the second single closed-l...

Embodiment 2

[0030] This system is basically the same as Embodiment 1 of the present invention, except that the water spray groups in the first single closed-loop circuit are all the first single closed-loop circuit feedforward section water spray groups; The controller of the water spraying group in the feedforward section of the single closed-loop loop. At the same time, the controller is also used to control the water spraying group in the feedforward section of the second single closed-loop loop according to the data measured by the intermediate thermometer, and to control the water spraying group according to the data measured by the back-end thermometer. The controller of the water spraying group in the feedback section of the second single closed-loop loop.

[0031] Embodiments 1 and 2 of the present invention, the cooling control of the system needs to realize two target temperatures (intermediate target temperature and coiling target temperature), the cooling before the intermediat...

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Abstract

The invention relates to a laminar flow cooling system of a hot milling band steel double ring controlling layer flow. The cooling system comprises a water spraying group aligned along an output roller passage, a controller used for controlling the water spraying groups, a front end temperature measuring instrument, a back end temperature measuring instrument, an intermediate temperature measuring instrument; wherein, the output terminals of the temperature measuring instruments are connected with the controller. The control loop of the system is divided into a first single closed ring loop and a second single closed ring loop with the intermediate temperature measuring instrument as the boundary. The front end temperature measuring instrument is the feedforward temperature measuring instrument of the first single closed ring loop, and the back end temperature measuring instrument is feedback temperature measuring instrument of the second single closed ring loop. In addition, the intermediate temperature measuring instrument is the feedback temperature measuring instrument of the first single closed ring loop and the feedforward temperature measuring instrument of the second single closed ring loop. The laminar flow cooling system of the invention adopts two closed ring controlling loops, the boundaries of which are the boundary between the front end temperature measuring instrument and the intermediate temperature measuring instrument, and the boundary between the intermediate temperature measuring instrument and the back end temperature measuring instrument. The invention reasonably adopts the actual measured temperature value and the module predicted temperature value of the temperature measuring instruments to effectively control the cooling process and the cooling time as well as the cooling speed.

Description

technical field [0001] The invention relates to the equipment on the output roller table of hot-rolled steel strip, especially the laminar flow cooling system of hot-rolled steel strip. Background technique [0002] Many new high-strength grade steel plates need to have high strength and good cold formability at the same time, so the mixed microstructure of duplex or multiphase plastic ferrite and bainite, martensite and retained austenite has become the goal that is pursued. How to design the laminar flow cooling system for hot-rolled strip steel, that is, to control the cooling rate of the steel strip on the output roller table after rolling, so as to control the evolution of the microstructure, is an important link in the production of this type of steel. [0003] Satisfying the intermediate target temperature of the laminar cooling system is the most direct embodiment of the cooling rate control. How to use the intermediate thermometer to meet the requirements of the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/76
Inventor 韩斌苏毅孟传胜王越平程立宋平许瑞璋
Owner 武钢集团有限公司
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