Emulsion fine cooling system control method and control device

A technology of cooling system control and cooling control, which is applied in the direction of workpiece cooling device, temperature control, metal rolling, etc., to achieve the effect of improving yield, stable system operation and high control precision

Active Publication Date: 2015-09-02
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the technical problems existing in the prior art, and provides a control method and control device for the emulsion fine cooling system with simple structure and convenient operation. The technical solution solves the problem of composite waves and partial waves of the plate and strip at the exit of the cold rolling mill. The technical solution of the present invention can effectively and quickly reduce the composite waves and local waves and the oblique shear stress of warping on the plate and strip. Elimination of wave shapes not only improves the quality of the strip steel surface, but also effectively improves the yield

Method used

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  • Emulsion fine cooling system control method and control device
  • Emulsion fine cooling system control method and control device

Examples

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Embodiment 1

[0044] see figure 1 — image 3 , a method for controlling an emulsion fine cooling system, the method comprising the following steps: 1) calculating residual defects of the shape according to the contact tension data of the sheet and strip steel measured by the shape roller at the exit of the rack,

[0045] 2) Calculate the number of effective nozzles according to the residual defects of the plate shape and the width of the strip, and N effective = B / 52

[0046] In the formula, B is the strip width (mm), and the distance between each nozzle is 52mm,

[0047] 3) According to the selected ratio, calculate the number of nozzles that should be opened N open, N open = N effective × K1,

[0048] K1 is the selected opening ratio, generally we choose 50%. Of course, you can reset K1 as needed,

[0049] 4) Search for N positions according to the optimal algorithm, and the positions of N nozzles are the N points with the largest residual plate shape defects,

[0050] 5) Use the d...

Embodiment 2

[0063] Example 2: see Figure 4 — Figure 9, an emulsion fine cooling control device, the control device includes a detection unit, a control unit, an execution unit, and a computer control system, and the detection unit includes a plate-shaped roller (11) for detecting tension at the outlet of the rack, and the roller body is set There are 26 sections, and each section is equipped with 4 pressure sensors for detecting tension in the four directions of 0°, 90°, 180° and 270° of the circumference, a total of 104, and it will detect different tensions of different sections values ​​are transmitted to the computer control system,

[0064] The control unit includes a profile control system 15 and a flatness control system 12, which converts and calculates the tension change signal transmitted by the profile rollers. The first wave A 1 x 4 is processed by inclination, and the second wave A 2 x 2 Processed by roll shifting and roll bending, 3 times and 4 times of high-order wave...

Embodiment 3

[0065] Example 3: see Figure 4 — Figure 9 , as an improvement of the present invention, the execution unit includes spray beam 1, liquid inlet pipe 2, air inlet pipe 3, lower work roll 4, upper work roll 5, plate and strip steel 6, tube bundle connection interface 7, nozzle A 8, B nozzle 9, C nozzle 10, pneumatic control system box 13, air source 14, upper surface control air source 16, lower surface control air source 17, emulsion frequency conversion pump 18, emulsion heater 19, piston blind end Cavity 20, built-in compressed air, emulsion medium cavity 21 in the spray beam box, injection valve body 22, injection valve fixing bolt 23, nozzle 24, injection channel 25, cavity 26 connecting the piston and the atmosphere, piston parts, all The spray beam is set as a two-chamber structure, the two-chamber spray beam 1 separates the liquid inlet pipe 2 and the air inlet pipe 3, and the cooling sections correspond to the sections of the plate shape measuring rollers, which are...

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Abstract

The invention relates to an emulsion fine cooling system control method. The emulsion fine cooling system control method is characterized by comprising the following steps that the plate-shaped residual defect is calculated in dependence on steel strip contact tension data detected by a frame outlet plate-shaped roller; 2) the valid nozzle number is calculated in dependence on the plate-shaped residual defect and the steel strip width, N (valid)=B/52, wherein B is the steel strip width (mm), and the distance between any two adjacent nozzles is 52mm; 3) the number N (open) of nozzles which need to be opened is calculated in dependence on a selected proportion, N (open) = N (valid)*K1, K1 is the selected open proportion, and is generally selected to be 50%, and the K1 can be reset as needed; 4) the positions of the N (open) nozzles are searched in dependence on the optimal algorithm, the positions of the N (open) nozzles are N (open) points where the plate-shaped residual defect is maximal; 5) through a direct optimum seeking method, a residual plate-shaped deviation value [epsilon]I is found out, and the number of points which are smaller than or equal to the residual plate-shaped deviation value is just equal to N (open); and 6) the optimum seeking is carried out through the above way until the condition is satisfied.

Description

technical field [0001] The invention relates to a fine cooling system, in particular to a control method and a realization device for an emulsion fine control cooling system of a cold rolling mill, belonging to the field of equipment cooling and lubrication systems. Background technique [0002] With the continuous improvement of product quality requirements in the metallurgical industry, higher requirements are placed on the stability of the rolling piece lubrication system, and the normality of the fine cooling system has the greatest impact on the quality, which is important for the production of high-grade tinplate In order to obtain high-quality products, Meishan Iron and Steel Co., Ltd. adopts a high-precision control fine cooling system to effectively control the thermal expansion of each section of the roll, and obtain the different roll crowns corresponding to each measurement section, and measure the shape at the exit of the 5-stand The 26 measuring sections of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/74B21B45/02
CPCB21B37/74B21B45/0203
Inventor 王金华苗旺
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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