CN106238468A - A kind of territory, hot-strip ultrafast cold-zone head not cooling control method - Google Patents
A kind of territory, hot-strip ultrafast cold-zone head not cooling control method Download PDFInfo
- Publication number
- CN106238468A CN106238468A CN201610900220.9A CN201610900220A CN106238468A CN 106238468 A CN106238468 A CN 106238468A CN 201610900220 A CN201610900220 A CN 201610900220A CN 106238468 A CN106238468 A CN 106238468A
- Authority
- CN
- China
- Prior art keywords
- pressure
- ultrafast cold
- head
- ultrafast
- cold
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/18—Automatic gauge control
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
A kind of territory, hot-strip ultrafast cold-zone head not cooling control method, is characterized in that ultrafast cold collector is arranged on mm finishing mill unit outlet, and the other total supply channel of ultrafast cold configures pressure-regulating valve group；Every ultrafast cold nozzle configuration control valve group；When strip steel head arrives finishing mill entrance ad-hoc location, pumping plant opened loop control pressure of supply water and total flow coarse adjustment；When finishing mill the 4th frame F4When stinging steel, regulate the pressure-regulating valve group on the other supply channel of ultrafast cold, with PDesired value+ Δ P is goal pressure, closed loop control supply channel pressure；When the coldest section of strip steel head is by ultrafast territory, cold-zone, according to strip steel position, open ultrafast cold collector successively；The coldest section of head of compensation is by behind territory, ultrafast cold-zone, and ultrafast cold collector opens the supply channel pressure loss caused of moment, makes ultrafast cooling system loine pressure and the fast quick-recovery of nozzle flow with PDesired valueAs the goal pressure of closed-loop control system, reduce the transition section length after the coldest section of head, it is achieved the high accuracy of the coldest segment length of head controls.
Description
Technical field
The invention belongs to Hot Rolling Strip technical field, particularly relate to the strip steel head under a kind of ultrafast cool condition not
The high-accuracy control method of cold section.
Background technology
In recent years, Ultra Fast Cooling application in hot rolling produces gets most of the attention.Ultra Fast Cooling has cold
But efficiency is high, the features such as cooling uniformity is good, is producing low cost, high-quality strip steel, particularly in the production of heavy gauge steel strip
During play an important role.In heavy gauge steel strip production process, the mode (being commonly called as dry head) that head need to be used the coldest improves
Strip steel head temperature, it is ensured that coil wrapper roll nipping smoothly to strip steel head.Strip steel head is the coldest partially due to use sky
Cold mode, performance cannot meet use demand, and therefore the control accuracy of the coldest segment length of head has material impact to lumber recovery.
Ultrafast cooling system is big due to pressure of supply water, and collector flow is big, and it is big, for hydraulic pressure that cooling manifold opens instantaneous pressure loss
Power and collector flow reach stably to need the regular hour, therefore in production process, before strip steel enters cooling zone, and ultrafast cold collection
Pipe typically need to be opened in advance, to guarantee that strip steel just enters territory, ultrafast cold-zone after pressure of supply water and collector stability of flow, thus super
Rapid cooling region is difficult to the coldest function of head.When producing strip steel head of being taken at present by cooling cold-zone, usual ultrafast cold collection
Managing normally-open, section cooling collector is closed, and utilizes " the returning red " of ultrafast cold strip steel afterwards to ensure the stable roll of strip steel head
Take.But for some think gauge high-strength steel products, it is thus only necessary to " the returning red " of strip steel cannot guarantee the stable roll of strip steel head
Take.
Have at present based on cold hot-strip head the coldest length control method (patent publication No.: the CN but of layer
104815852 A), wherein section cooling uses high-level tank water, by elevated tank Liquid level hydraulic pressure, owing to laminar flow is cold
But collector opens moment, and elevated tank level fluctuation is not enough to produce excessive water pressure fluctuations, the therefore the coldest control of section cooling head
Process water pressure fluctuations processed can be ignored.Separately there is research (patent publication No.: the CN of hot-rolling line ultrafast cooling system water-supply control
103605390 A), but it mainly considers that steel rolling gap is energy-saving and cost-reducing and reduces pipe-line system impact, is not directed to territory, ultrafast cold-zone
The control method that interior strip steel head is the coldest.
Summary of the invention
It is an object of the invention to provide a kind of territory, hot-strip ultrafast cold-zone head not cooling control method, it is possible to reduce ultrafast
Cold collector opens the supply channel pressure oscillation of moment, makes supply channel pressure and collector flow be rapidly achieved the target of setting
Value, reduces the transition section length after the coldest section of head, thus solves territory, ultrafast cold-zone and cannot realize the skill of the coldest function of head
An art difficult problem.
Territory, the hot-strip ultrafast cold-zone head not cooling control method of the present invention, it is characterised in that use hydraulic pressure precompensation control
System strategy, is tracked strip steel head location on a production line by control system, adjusts control flow and control
Sequential, the coldest section of head of compensation is by behind territory, ultrafast cold-zone, and ultrafast cold collector is opened the supply channel pressure caused of moment and damaged
Lose, make ultrafast cooling system loine pressure and nozzle flow be rapidly achieved stationary value, reduce the transition segment length after the coldest section of head
Degree, it is achieved the high accuracy of the coldest segment length of head controls.
Accompanying drawing explanation
Fig. 1 is the layout drawing of roller repairing equipment used by the inventive method；
Fig. 2 is the ultrafast cold pressure measured curve of method of carrying out an invention；
Fig. 3 a 3b be that conventional method compares figure with the belt steel temperature measured curve of the inventive method.
Detailed description of the invention
Fig. 1: ultrafast cold collection is shown in the equipment configuration implementing territory, hot-strip of the present invention ultrafast cold-zone head not cooling control method
Pipe is arranged on mm finishing mill unit outlet and entry position, section cooling district, and ultrafast cold collector is directly supplied water by pumping plant, and pumping plant uses and becomes
Frequently pump or fluid-flywheel clutch, the other total supply channel of ultrafast cold configures multiple pressure-regulating valve group；Every ultrafast cold nozzle is joined
Put a set of control valve group, including Pneumatic opening & closing valve, flow control valve and effusion meter.
The control method of territory, the hot-strip ultrafast cold-zone the coldest segment length of head specifically includes following steps:
Step 1: strip steel head location on a production line is tracked by control system, when the strip steel of technological requirement
When the coldest segment length of head is more than 0m, put into head the coldest control function.
Step 2: when strip steel head arrives finishing mill entrance ad-hoc location or finishing mill the first frame F1When stinging steel, ultrafast cold
Control system sends pressure of supply water and flow signal to water supply pumping plant, and pumping plant uses open-loop control method pressure of supply water and total flow
Carrying out coarse adjustment, the most ultrafast cold control system adjusts the pressure-regulating valve group on the other supply channel of ultrafast cold to initial state, tune
Joint valve initial openings degree preferably 35%～40%；
Step 3: after ultrafast cold water supply pumping plant receives signal, starts raising frequency, uses open-loop control method, makes pressure of supply water connect
Nearly 0.2～0.9MPa interval setting value, makes water supply flow close to 3000～12000m simultaneously3The desired value that/h is interval；
Step 4: when finishing mill the second frame F2When stinging steel, all ultrafast cold collector Pneumatic opening & closing valves are placed in cut out shape
State, flow control valve is according to setting flow (45～350m3/ hr) regulation extremely required opening degree；
Step 5: when finishing mill the 4th frame F4When stinging steel, setting pressure PDesired valueOn the basis of, increase pressure supplement
Preferred 0.05MPa～0.25MPa of span of Δ P, Δ P, puts into pressure closed-loop control system, regulates the other feed pipe of fast cold
Pressure-regulating valve group on road makes pressure of supply water reach PDesired value+ΔP；
Step 6: the coldest section of strip steel head enters territory, ultrafast cold-zone, and the coldest section of strip steel head is tracked by control system,
After the coldest section of head is by ultrafast cold collector, open ultrafast cold collector successively by the configuration set.
Step 7: the coldest section of strip steel head is by, behind territory, ultrafast cold-zone, removing pressure supplement Δ P, by regulating fast cold
Pressure-regulating valve group on other supply channel, carries out pressure closed loop control, makes supply channel pressure stability at PDesired value；
Step 8: put into ultrafast cold collector flow closed-loop control system, make ultrafast cold collector flow be rapidly achieved the mesh of setting
Scale value, control system dynamically regulates ultrafast cold collector opening according to product cooling technological requirement.Embodiment:
Steel grade: pipe line steel X70；Belt steel thickness: 16.87mm；Strip width: 1650.0mm；Finish rolling outlet target temperature
FDT:810 DEG C；Ultrafast cold outlet target temperature UFCT:600 DEG C；Head the coldest segment length setting value: 3m；The ultrafast total water of cold setting
Amount: 8000m3/hr；Ultrafast cold pressure desired value PDesired value: 0.85MPa；Ultrafast cold single collector sets water yield 120m3/hr；Head
Not cold pressure offset Δ P:0.15MPa.
Control flow and control sequential:
1) strip steel head location on a production line is tracked by control system, and the strip steel head of technological requirement is not
Cold segment length is 3m, puts into head the coldest control function.
2) as milling train F1When stinging steel, ultrafast cold control system sends pressure of supply water and total flow letter to ultrafast cold water supply pumping plant
Number, pumping plant uses open-loop control method pressure of supply water and total flow to carry out coarse adjustment, and wherein pressure of supply water is 0.85MPa, total Water
For 8000m3/hr；The most ultrafast cold control system adjusts the pressure-regulating valve group opening degree on the other supply channel of ultrafast cold extremely
Initial precalculated position；Regulation valve opening degree is made to be maintained at 35%～40%；
3), after pumping plant receives signal, use open-cycle controller, by three variable frequency pumps raising frequency simultaneously to and goal pressure
0.85MPa and total Water 8000m3The 48Hz that/hr is corresponding；
4) finishing mill the second frame F2When stinging steel, ultrafast cold basic automatization (L1Level) receive from Process Control System
(L2Level) ultrafast cold single cooling manifold set the water yield as 120m3/ hr, closes ultrafast cold collector Pneumatic opening & closing valve, and according to list
Root collector sets the water yield, cooling manifold regulates valve opening adjustment to correspondence position；
5) finishing mill the 4th frame F4When stinging steel, ultrafast cold pressure closed loop controller puts into, by PDesired value+ Δ P i.e. 1.0MPa
As supply channel pressure target value, make pipeline for hydraulic pressure by regulating the pressure-regulating valve group on the other supply channel of ultrafast cold
Power reaches desired value；
6) the coldest section of strip steel head enter ultrafast cold after, ultrafast cold control system according to strip steel head is carried out real-time with
Track, after the coldest section of strip steel head is by ultrafast cold collector, according to setting configuration, opens ultrafast cold collector successively；
7) the coldest section of strip steel head is by, behind territory, ultrafast cold-zone, removing pressure supplement Δ P, ultrafast cold pressure closed loop control
Device pressure target value is reverted to 0.85MPa by 1.0MPa, by regulating the pressure-regulating valve group on the other supply channel of fast cold, enters
Row pressure closed loop controls, and makes supply channel pressure stability at 0.85MPa；
8) ultrafast cold collector flow closed loop controller puts into, with 120m3/ hr, as setting value, is controlled by regulation collector
The flow control valve of valve group, the ultrafast cold single collector flow of closed loop control；Control system is dynamic according to product cooling technological requirement
Regulate ultrafast cold collector opening.
Fig. 2 is ultrafast cold supply channel pressure Actual Control Effect of Strong curve, therefrom it can be seen that control effect: pumping plant raising speed
Point starts, and ultrafast cold water presses liter；After pressure closed loop puts into, ultrafast cold water pressure reaches the goal pressure after pressure compensation；Ultrafast
After cold nozzle is opened, hydraulic pressure is rapidly achieved the goal pressure of process requirements, it is to avoid the pressure significantly shake near setting value
Swing, shorten the time of changeover portion.
Fig. 3 a is conventional method strip steel head the coldest control result, the coldest a length of 3.24m of strip steel head, transition section length
For 4.35m；Fig. 3 b is to use the inventive method head the coldest control effect after improving, the coldest physical length of strip steel head
3.42m, exists without obvious changeover portion, and after strip steel head is the coldest, ultrafast cold outlet temperature tends to rapidly desired value 600 DEG C, not
The strip steel head temperature fluctuation caused because of the enforcement of the coldest technique of head, simultaneously strip steel logical volume stable temperature control occur, it is possible to
Meet high-quality strip steel and produce needs.
Claims (3)
1. territory, hot-strip ultrafast cold-zone head not cooling control method, it is characterised in that use hydraulic pressure Compensatory Control plan
Slightly, by control system, strip steel head location on a production line is tracked, adjusts control flow and control sequential,
The coldest section of head of compensation is by behind territory, ultrafast cold-zone, and ultrafast cold collector opens the supply channel pressure loss caused of moment, makes
Ultrafast cooling system loine pressure and nozzle flow are rapidly achieved stationary value, reduce the transition section length after the coldest section of head, real
The high accuracy of the existing the coldest segment length of head controls.
Territory, hot-strip the most according to claim 1 ultrafast cold-zone head not cooling control method, it is characterised in that control stream
Journey and control sequential: strip steel head location on a production line is tracked by control system, when the strip steel of technological requirement
When the coldest segment length of head is more than 0m, put into head the coldest control function: when strip steel head arrives finishing mill entrance ad-hoc location
Or finishing mill the first frame F1When stinging steel, ultrafast cold control system sends pressure of supply water and total flow signal, pump to water supply pumping plant
Standing and use open-loop control method pressure of supply water and total flow to carry out coarse adjustment, the most ultrafast cold control system adjusts the other confession of ultrafast cold
Pressure-regulating valve group opening degree in water lines is to initial precalculated position；When finishing mill the second frame F2When stinging steel, control system
Set the water yield according to collector and adjust collector regulation valve opening degree, ultrafast cold basic automatization (L1Level) receive from process control
System (L2Level) ultrafast cold single cooling manifold set the water yield as 120m3/ hr, closes ultrafast cold collector Pneumatic opening & closing valve, and root
The water yield is set according to single collector；When finishing mill the 4th frame F4When stinging steel, by regulating the pressure on the other supply channel of ultrafast cold
Force regulating valve group, with PDesired value+ Δ P is goal pressure, carries out supply channel pressure closed loop control；The coldest section of strip steel head is by super
During rapid cooling region, according to strip steel position, open ultrafast cold collector successively；The coldest section of strip steel head is by, behind territory, ultrafast cold-zone, going
Fall pressure supplement Δ P, by regulating the pressure-regulating valve group on the other supply channel of fast cold, carry out pressure closed loop control, with
Recover PDesired valueGoal pressure for closed loop control；Ultrafast cold collector flow closed loop controller puts into, with 120m3/ hr is as setting
Value, by regulating the flow control valve of collector control valve group, the ultrafast cold single collector flow of closed loop control；Control system is according to product
Product cooling technological requirement dynamically regulates ultrafast cold collector opening.
Territory, hot-strip the most according to claim 2 ultrafast cold-zone head not cooling control method, it is characterised in that ultrafast cold
The concrete grammar of the control of the coldest segment length of region head is as follows:
Step 1: strip steel head location on a production line is tracked by control system, when the strip steel head of technological requirement
When the coldest segment length is more than 0m, put into head the coldest control function.
Step 2: when strip steel head arrives finishing mill entrance ad-hoc location or finishing mill the first frame F1When stinging steel, ultrafast cold control
System sends pressure of supply water and flow signal to water supply pumping plant, and pumping plant uses open-loop control method pressure of supply water and total flow to carry out
Coarse adjustment, the most ultrafast cold control system adjusts the pressure-regulating valve group on the other supply channel of ultrafast cold to initial state, regulation valve
Initial openings degree preferably 35%～40%；
Step 3: after ultrafast cold water supply pumping plant receives signal, starts raising frequency, uses open-loop control method, makes pressure of supply water close
0.2～0.9MPa interval setting value, makes water supply flow close to 3000～12000m simultaneously3The desired value that/h is interval；
Step 4: when finishing mill the second frame F2When stinging steel, all ultrafast cold collector Pneumatic opening & closing valves are placed in off, flow
Regulation valve is according to setting flow (45～350m3/ hr) regulation extremely required opening degree；
Step 5: when finishing mill the 4th frame F4When stinging steel, setting pressure PDesired valueOn the basis of, increase pressure supplement Δ P, Δ
Preferred 0.05MPa～0.25MPa of span of P, puts into pressure closed-loop control system, regulates on the other supply channel of fast cold
Pressure-regulating valve group makes pressure of supply water reach PDesired value+ΔP；
Step 6: the coldest section of strip steel head enters territory, ultrafast cold-zone, and the coldest section of strip steel head is tracked, right overhead by control system
Ultrafast cold collector, by after ultrafast cold collector, is opened successively by the configuration set by the coldest section of portion.
Step 7: the coldest section of strip steel head is by, behind territory, ultrafast cold-zone, removing pressure supplement Δ P, and fast cold is other to be supplied by regulating
Pressure-regulating valve group in water lines, carries out pressure closed loop control, makes supply channel pressure stability at PDesired value；
Step 8: put into ultrafast cold collector flow closed-loop control system, make ultrafast cold collector flow be rapidly achieved the target of setting
Value, control system dynamically regulates ultrafast cold collector opening according to product cooling technological requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610900220.9A CN106238468A (en) | 2016-10-14 | 2016-10-14 | A kind of territory, hot-strip ultrafast cold-zone head not cooling control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610900220.9A CN106238468A (en) | 2016-10-14 | 2016-10-14 | A kind of territory, hot-strip ultrafast cold-zone head not cooling control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106238468A true CN106238468A (en) | 2016-12-21 |
Family
ID=57611514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610900220.9A Withdrawn CN106238468A (en) | 2016-10-14 | 2016-10-14 | A kind of territory, hot-strip ultrafast cold-zone head not cooling control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106238468A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107442585A (en) * | 2017-07-27 | 2017-12-08 | 江苏省沙钢钢铁研究院有限公司 | A kind of control method for realizing the special cooling of hot-strip initiating terminal |
-
2016
- 2016-10-14 CN CN201610900220.9A patent/CN106238468A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107442585A (en) * | 2017-07-27 | 2017-12-08 | 江苏省沙钢钢铁研究院有限公司 | A kind of control method for realizing the special cooling of hot-strip initiating terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110624960B (en) | Strip steel cooling control method combining ultra-fast cooling and conventional laminar cooling | |
| CN101983800B (en) | Secondary cooling water distribution advanced control method for billet continuous casting machine | |
| CN104525885B (en) | A kind of strong cold water spray system of cast steel and strong refrigerating technology | |
| CN103611734B (en) | A kind of section cooling temperature-controlled process and system | |
| CN107442585B (en) | Control method for realizing special cooling of starting end of hot-rolled strip steel | |
| CN105618491B (en) | A kind of Plate Production method, apparatus and control system for steel plate on-line solution | |
| CN103331303B (en) | A kind of pickling milling method of cold rolling parking spot | |
| CN103071774A (en) | Method for controlling surface temperature of casting blank at straightening point of continuous casting machine | |
| CN106391727A (en) | Head no-cooling control method for hot rolled strip steel in ultra-rapid cooling area | |
| CN101665946B (en) | Device and method for controlling cold-rolling steel strip pickling turbulence | |
| CN110883103B (en) | Method for controlling uniformity of cooling temperature of rolled medium plate for ultra-fast cooling system | |
| CN102859009A (en) | Process for hot rolling steel strips and hot rolling train | |
| CN103170506A (en) | Hot rolling and finish rolling multi-level threading speed control method | |
| CN103459065A (en) | Method and device for the controlled secondary cooling of a continuous casting installation | |
| CN203346463U (en) | Aluminum profile quenching device | |
| CN109174981A (en) | A kind of hot continuous rolling intermediate blank cooling device and its application method | |
| CN106238468A (en) | A kind of territory, hot-strip ultrafast cold-zone head not cooling control method | |
| CN109604355A (en) | The constant pressure water supply control method of hot-strip ultra-rapid cooling pumping plant | |
| CN102755999B (en) | Interstand cooling device for hot-rolled H-shaped steel | |
| CN102581043B (en) | Water mist cooling system and water mist cooling method for steel strip hot-rolling process | |
| CN204035206U (en) | The pre-cooled device of single chassis reversable mill spray system | |
| CN103286147B (en) | Hot-rolled board strip production line laminar cooling method | |
| CN109014102B (en) | Secondary cooling method for high-drawing-speed medium-thin slab continuous casting machine | |
| CN206643135U (en) | DEVICE FOR BAR AND WIRE HOT ROLLING water cooling plant control system | |
| CN104070074A (en) | A method for controlling the temperature of steel plates of high-temperature rolling of a rolling mill with a single rack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20161221 |