Online cooling device and control method for moderate-thickness plate
A technology of a cooling device and a control method, which is applied in the field of hot-rolled medium-thick plate cooling, can solve the problems of insufficient cooling control accuracy and backward technology, and achieve the effect of fast and high-precision coupling control and meet the control requirements
Active Publication Date: 2014-06-18
NORTHEASTERN UNIV
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Problems solved by technology
[0004] Due to the relatively backward technology of the existing cold ultra-fast cooling equipment, there is no combination of more accurate control elements and detection elements, and the cooling control accuracy cannot meet the requirements. This patent adopts advanced elements for design, which meets the requirements of the existing steel mills
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[0035] figure 1 Shown is the structure of the medium and thick plate on-line cooling device of the present invention, which includes a high-pressure variable-frequency water supply pump 1, a diversion collector 2, a bypass valve 4, a thermometer 6, a water pressure gauge 7, a plurality of water spray headers 8 and control Unit 9. The output end of the water supply pump 1 is connected to the water inlet of the diversion water collection pipe 2, and the diversion water collection pipe 2 is connected to a plurality of water spray headers 8 through a plurality of connection pipelines 10, and a flow rate is installed on the plurality of connection pipelines 10. The pneumatic regulating valve 3 and the flowmeter 5 are also connected with a bypass pipeline 11 on the diversion water collection pipe 2, and a bypass valve 4 is also installed in the bypass pipeline 11. And, the branch water collection pipe 2 is connected with a thermometer 6 and a water pressure gauge 7, and the signal ...
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The invention discloses an online cooling device and control method for a moderate-thickness plate. The method comprises the steps of collecting and drawing the curve between the flow of a collecting pipe and the opening degree of a valve, collecting and drawing the relation between the frequency of a water supply pump and the total water of a cooling device terminal, according to the set water supply pressure P0, the set collecting pipe flow Fo and the pre-collected relation curve between the flow of the collecting pipe and the opening degree of the valve, conducting linear interpolation calculation, rapidly setting the valve opening degree U0, according to the set water supply pressure P0, the set total flow F and the pre-collected relation curve between the water supply amount and the frequency of the water supply pump, conducting linear interpolation calculation, rapidly setting the frequency V0 of the water supply pump, when the opening degree of the valve of the collecting pipe and the frequency of the water supply pump reach the set value, enabling a collecting pipe flow and water supply pressure coupling closed-loop control module of a control unit to be put into operation, achieving the rapid and high-precision coupling control over the collecting pipe flow and the water supply pressure, and meeting the control requirements of a water supply system for the pressure precision.
Description
technical field [0001] The invention relates to the technical field of hot-rolled plate cooling, in particular to an on-line cooling device and control method for medium plate. Background technique [0002] In recent years, more and more attention has been paid to the controlled cooling technology after plate rolling. In order to produce high-performance products, iron and steel enterprises have put forward higher cooling speed and cooling uniformity requirements. Traditional laminar flow cooling devices can no longer meet the increasing cooling performance requirements of iron and steel enterprises. [0003] The TMCP process (Thermo Mechanical Control Process) has a very important influence on the metallographic structure and mechanical properties of the rolled steel plate. The high-precision control of process parameters such as final cooling temperature and cooling speed is the basic guarantee for the strict implementation of the ultra-rapid cooling process for medium an...
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Login to View More IPC IPC(8): B21B45/02B21B37/74
CPCY02P70/10
Inventor 王丙兴胡啸王昭东王国栋李勇韩毅田勇
Owner NORTHEASTERN UNIV