CN100363122C - Cold-rolled strip steel cooling liquid flow control method - Google Patents
Cold-rolled strip steel cooling liquid flow control method Download PDFInfo
- Publication number
- CN100363122C CN100363122C CNB200510046490XA CN200510046490A CN100363122C CN 100363122 C CN100363122 C CN 100363122C CN B200510046490X A CNB200510046490X A CN B200510046490XA CN 200510046490 A CN200510046490 A CN 200510046490A CN 100363122 C CN100363122 C CN 100363122C
- Authority
- CN
- China
- Prior art keywords
- control
- cooling liquid
- strip steel
- flow
- degree
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 239000000110 cooling liquid Substances 0.000 title claims abstract description 16
- 238000005097 cold rolling Methods 0.000 claims abstract description 16
- 239000002826 coolant Substances 0.000 claims description 17
- 238000003801 milling Methods 0.000 claims description 4
- 238000013178 mathematical model Methods 0.000 abstract 2
- 238000005096 rolling process Methods 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides a cold-rolled strip steel cooling liquid flow control method, which mainly comprises the following steps: calculating the flow rate of the cooling liquid at the rated speed by a process computer according to friction and conduction heating in cold rolling; when the strip steel reaches the rolling mill, the process computer sends out the flow of the cooling liquid at the rated speed; the PLC carries out matching according to the flow of the cooling liquid at a rated speed issued by the process computer and the rolling speed, and the matched application flow is used as a control given value of the control valve; and calculating the control degree of the control valve, and converting the control degree of the control valve into an electric signal to control the opening of the valve by the PLC, wherein the control degree of the control valve is calculated by a mathematical model. The invention compensates the influence caused by the factors such as pipelines, nozzles and the like through the mathematical model, ensures that the actual flow value is basically equal to the applied flow, reduces the strip steel thickness fluctuation caused by flow deviation and improves the strip steel thickness control precision.
Description
Technical field
The present invention relates to a kind of fluid flow control method, especially a kind of control method of cooling liquid for cold rolling strip steel.
Background technology
Existing cold-strip steel cooling fluid (being emulsion) flow control methods mainly comprises: calculate coolant rate under the normal speed by process computer according to friction in the cold rolling and conduction caloric value; When the band steel arrived milling train, process computer issued the coolant rate under the normal speed; Coolant rate under the normal speed that PLC issues according to process computer mates by mill speed, and matching process is:
F＝F
bas+(V-V
min)÷(V
set-V
min)×F
set
The F application traffic;
F
BasMinimum flow;
F
SetCoolant rate under the normal speed;
The current mill speed of V;
V
SetMaximum mill speed;
V
MinMinimum mill speed.
Application traffic after the calculating is as the control set-point of control valve; And then calculate the degree of control of control valve, convert signal of telecommunication by-pass valve control opening to by PLC at last.Because being the ratio according to the control set-point of control valve and its maximum stream flow, calculates the degree of control of control valve, yet we find in debugging, owing to be subjected to the influence of factors such as pipeline, nozzle, cooling control valve degree of control not with the proportional relation of flow measurements, the deviation of flow can cause oil film and the cooling after mill speed changes deviation to occur, thereby produced the belt steel thickness fluctuation, influenced the belt steel thickness control accuracy.
Summary of the invention
The object of the present invention is to provide a kind of influence that can eliminate factors such as pipeline, nozzle, make the degree of control and the linear control method of cooling liquid for cold rolling strip steel of coolant rate of valve, so that under different mill speeds, can both reach control accuracy preferably, reduce the belt steel thickness fluctuation.
The object of the present invention is achieved like this, and a kind of control method of cooling liquid for cold rolling strip steel mainly comprises: calculate coolant rate under the normal speed by process computer according to friction in the cold rolling and conduction caloric value; When the band steel arrived milling train, process computer issued the coolant rate under the normal speed; Coolant rate under the normal speed that PLC issues according to process computer mates by mill speed, and matching process is:
F＝F
bas+(V-V
min)÷(V
set-V
min)×F
set
The F application traffic;
F
BasMinimum flow;
F
SetCoolant rate under the normal speed;
The current mill speed of V;
V
SetMaximum mill speed;
V
MinMinimum mill speed.
Application traffic after the calculating is as the control set-point of control valve; And then calculate the degree of control of control valve, and convert signal of telecommunication by-pass valve control opening to by PLC at last, it is characterized in that: the degree of control of control valve is according to Mathematical Modeling: Y=aX
2-bX+c (50/k≤X≤100); Y=kX (0＜X＜50/k) calculate, wherein:
Y: valve degree of control (0＜Y≤100, wherein: 100 are equivalent to 100% degree of control);
X: application traffic/maximum stream flow * 100;
A, b, c, k are constant term, and span is respectively:
a＝0.2225～0.277、b＝37.83～47.98、c＝1658～2128、k＝0.577～0.588。
Because the degree of control of control valve is to calculate according to the Mathematical Modeling of piecewise function among the present invention, compensated the influence that causes because of factors such as pipeline, nozzles, the flow actual value is equated with application traffic basically, the belt steel thickness that has reduced to cause because of flow deviation fluctuates, and has improved the belt steel thickness control accuracy.
The specific embodiment
Control method of cooling liquid for cold rolling strip steel of the present invention mainly comprises: calculate coolant rate under the normal speed by process computer according to friction in the cold rolling and conduction caloric value; When the band steel arrived milling train, process computer issued the coolant rate under the normal speed; Coolant rate under the normal speed that PLC issues according to process computer mates by mill speed, and matching process is:
F＝F
bas+(V-V
min)÷(V
set-V
min)×F
set
The F application traffic;
F
BasMinimum flow;
F
SetCoolant rate under the normal speed;
The current mill speed of V;
V
SetMaximum mill speed;
V
MinMinimum mill speed.
Application traffic after the calculating is as the control set-point of control valve; And then calculate the degree of control of control valve, and convert signal of telecommunication by-pass valve control opening to by PLC at last, it is characterized in that: the degree of control of control valve is according to Mathematical Modeling: Y=aX
2-bX+c (50/k≤X≤100); Y=kX (0＜X＜50/k) calculate, wherein:
Y: valve degree of control (0＜Y≤100, wherein: 100 are equivalent to 100% degree of control);
X: application traffic/maximum stream flow * 100;
A, b, c, k are constant term.
The constant term span is respectively in the Mathematical Modeling of control method of cooling liquid for cold rolling strip steel of the present invention:
a＝0.2225～0.277、b＝37.83～47.98、c＝1658～2128、k＝0.577～0.588。
Mathematical Modeling in the control method of cooling liquid for cold rolling strip steel of the present invention, can adopt following several according to the actual needs of producing at least:
Embodiment one:
Y＝0.2225X
2-37.83X+1658(50/k≤X≤100)；Y＝0.588X(0＜X＜50/k)。
Embodiment two:
Y＝0.238X
2-40.7X+1790(50/k≤X≤100)；Y＝0.585X(0＜X＜50/k)。
Embodiment three:
Y＝0.277X
2-47.98X+2128(50/k≤X≤100)；Y＝0.577X(0＜X＜50/k)。
Claims (4)
1. control method of cooling liquid for cold rolling strip steel mainly comprises: calculate coolant rate under the normal speed by process computer according to the friction in the cold rolling and conduction caloric value; When the band steel arrives milling train, send the coolant rate under the normal speed under the process computer; Coolant rate under the normal speed that PLC issues according to process computer mates by mill speed, and matching process is:
F＝F
bas+(V-V
min)÷(V
set-V
min)×F
set
The F application traffic;
F
BasMinimum flow;
F
SetCoolant rate under the normal speed;
The current mill speed of V;
V
SetMaximum mill speed;
V
MinMinimum mill speed;
Application traffic after the calculating is as the control set-point of control valve; Calculate the degree of control of control valve, convert signal of telecommunication by-pass valve control opening to by PLC again, it is characterized in that: the degree of control of control valve is by Mathematical Modeling: Y=aX
2-bX+c (50/k≤X≤100); Y=kX (0＜X＜50/k) calculate, wherein:
Y: valve degree of control (0＜Y≤100, wherein: 100 are equivalent to 100% degree of control);
X: application traffic/maximum stream flow * 100;
A, b, c, k are constant term, and value is respectively:
a＝0.2225～0.277、b＝37.83～47.98、c＝1658～2128、k＝0.577～0.588。
2. a kind of control method of cooling liquid for cold rolling strip steel according to claim 1 is characterized in that: the value of constant term is respectively in the Mathematical Modeling: a=0.2225, b=37.83, c=1658, k=0.588.
3. a kind of control method of cooling liquid for cold rolling strip steel according to claim 1 is characterized in that: the value of constant term is respectively in the Mathematical Modeling: a=0.277, b=47.98, c=2128, k=0.577.
4. a kind of control method of cooling liquid for cold rolling strip steel according to claim 1 is characterized in that: the value of constant term is respectively in the Mathematical Modeling: a=0.238, b=40.7, c=1790, k=0.585.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510046490XA CN100363122C (en) | 2005-05-20 | 2005-05-20 | Cold-rolled strip steel cooling liquid flow control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510046490XA CN100363122C (en) | 2005-05-20 | 2005-05-20 | Cold-rolled strip steel cooling liquid flow control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1857810A CN1857810A (en) | 2006-11-08 |
| CN100363122C true CN100363122C (en) | 2008-01-23 |
Family
ID=37296795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510046490XA Expired - Fee Related CN100363122C (en) | 2005-05-20 | 2005-05-20 | Cold-rolled strip steel cooling liquid flow control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100363122C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103861875A (en) * | 2014-03-05 | 2014-06-18 | 辽宁科技大学 | Optimal control method of cold-rolling mill process cooling system |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5054369B2 (en) * | 2006-12-19 | 2012-10-24 | 株式会社日立製作所 | Winding temperature control device and control method |
| CN102012686B (en) * | 2010-07-15 | 2012-11-21 | 秦皇岛首秦金属材料有限公司 | Method for accurately controlling low-pressure section of hardening machine to perform weak water cooling |
| CN104289525B (en) * | 2013-07-18 | 2016-11-23 | 上海宝钢钢材贸易有限公司 | The cold rolling middle emulsion total flow set method of Stand Mill six-high cluster mill |
| CN104043660B (en) * | 2013-09-26 | 2015-09-30 | 北大方正集团有限公司 | A kind of production technology of non-hardened and tempered steel |
| CN104858241B (en) * | 2014-02-20 | 2017-01-04 | 宝山钢铁股份有限公司 | A kind of emulsion flow comprehensive optimization method of tandem mills paper-thin strip rolling |
| CN106363023B (en) * | 2015-07-22 | 2017-10-31 | 宝山钢铁股份有限公司 | A kind of tandem mills emulsion differentiation flow establishing method |
| CN111183002B (en) * | 2017-10-13 | 2022-04-05 | 住友重机械精科技株式会社 | Coolant treatment device |
| CN111036691A (en) * | 2018-10-14 | 2020-04-21 | 何定武 | Intelligent liquid supply control system for rolling mill |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0596314A (en) * | 1991-10-02 | 1993-04-20 | Sumitomo Metal Ind Ltd | Method for controlling flange cooling of rolled shape steel |
| JPH0970607A (en) * | 1995-09-06 | 1997-03-18 | Kobe Steel Ltd | Method for learning control in process line |
| JPH10263630A (en) * | 1997-03-25 | 1998-10-06 | Kawasaki Steel Corp | Rolling method |
| CN1224641A (en) * | 1999-02-25 | 1999-08-04 | 宝山钢铁(集团)公司 | Digital and analog control method of stabilizing the state of emulsified liquid in steel band cold-rolling |
-
2005
- 2005-05-20 CN CNB200510046490XA patent/CN100363122C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0596314A (en) * | 1991-10-02 | 1993-04-20 | Sumitomo Metal Ind Ltd | Method for controlling flange cooling of rolled shape steel |
| JPH0970607A (en) * | 1995-09-06 | 1997-03-18 | Kobe Steel Ltd | Method for learning control in process line |
| JPH10263630A (en) * | 1997-03-25 | 1998-10-06 | Kawasaki Steel Corp | Rolling method |
| CN1224641A (en) * | 1999-02-25 | 1999-08-04 | 宝山钢铁(集团)公司 | Digital and analog control method of stabilizing the state of emulsified liquid in steel band cold-rolling |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103861875A (en) * | 2014-03-05 | 2014-06-18 | 辽宁科技大学 | Optimal control method of cold-rolling mill process cooling system |
| CN103861875B (en) * | 2014-03-05 | 2016-01-20 | 辽宁科技大学 | The optimal control method of cold-rolling mill technical cooling system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1857810A (en) | 2006-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100363122C (en) | Cold-rolled strip steel cooling liquid flow control method | |
| CN101797588B (en) | Secondary control rolling force forecasting method of hot mill | |
| KR20140077193A (en) | Feedforward thickness control method for performance of cold rolling mill | |
| CN204007304U (en) | Plate type heat exchanger monitoring early-warning system | |
| CN105195524A (en) | Plate and strip thickness compensation control method in speeding up or down rolling process during cold rolling | |
| WO2013125671A1 (en) | Proportional mixing system | |
| CN103920719A (en) | Method for controlling convexity of hot rolled plate shape | |
| CN103861875B (en) | The optimal control method of cold-rolling mill technical cooling system | |
| Kim | An analytical solution to heat conduction with a moving heat source | |
| CN103331538A (en) | Copper tube nitrogen charging and welding method and nitrogen charging and welding control device | |
| CN104678856A (en) | GIS (Geographic Information System)-based operational control method and system for pipeline cleaner or detector | |
| JP6867972B2 (en) | Wear detection method for electric valve drive device | |
| CN101858810B (en) | On-line measurement method for pressure drop ratio of adjusting valve | |
| CN102691875B (en) | Method for adjusting lubricating oil temperature of oil film bearing | |
| CN105654193A (en) | Iron and steel enterprise oxygen scheduling optimization system and iron and steel enterprise oxygen scheduling optimization method | |
| CN205560240U (en) | Hydraulic pressure oil feeding system oil temperature control device | |
| DE2744625B2 (en) | Method and device for the automatic control of an air separation plant | |
| CN203384630U (en) | Oil gas cooling lubrication device based on vortex tube | |
| CN106282826A (en) | A kind of preparation method of the seamless pipe for high-pressure pipe connector | |
| CN204922033U (en) | Fixing device of angle stroke control dish valve | |
| EP2423336B1 (en) | Method for controlling the temperature of the metal bath during the blowing process in a converter | |
| CN104991047A (en) | Molten iron component confirmation method | |
| CN101713980B (en) | Method for on-line fitting work hardening curve | |
| CN205200513U (en) | High accuracy cooling system | |
| CN208779144U (en) | Gas station field device automatic sewage discharging device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080123 Termination date: 20200520 |