CN101041176A - Method and device for cleaning twin-roll thin strip concasting roller surface - Google Patents
Method and device for cleaning twin-roll thin strip concasting roller surface Download PDFInfo
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- CN101041176A CN101041176A CN 200610025066 CN200610025066A CN101041176A CN 101041176 A CN101041176 A CN 101041176A CN 200610025066 CN200610025066 CN 200610025066 CN 200610025066 A CN200610025066 A CN 200610025066A CN 101041176 A CN101041176 A CN 101041176A
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Abstract
The invention relates to a cleaning method for roller face of continuous caster roller and the device for solving the technology problem that controllability of prior cleaning method is weaker. The cleaning method is that in casting initial stage, the surface of continuous caster roller is pressed by a brush roller device and the initial value of displacement sensor is x0; if the system sends deviation signal changing displacement to the sensor, it can drive the hydraulic cylinder move to the new displacement value x=x0+ Delta x; the system scans the temperature on the surface of continuous caster roller and the scanned curve is compared with the setting object curve; if the tendency is the same, the prior brush roller device continue to clean; if the tendency is different, it is verified if the cooling water to continuous caster roller appears different; if it is different, the controller calculates displacement deviation value needed by the brush roller according to formula and can send it to the displacement sensor so as to drive the hydraulic cylinder move and control the program to cycle continuously; if there is no difference, the data of temperature scanning curve to roller surface is processed in filter; according to filtered data the controller calculates the displacement deviation value of hydraulic cylinder needed by the cleaning device and drives the hydraulic cylinder move accordingly. The invention is suitable for twin-roll thin belt caster.
Description
Technical field: the present invention relates to a kind of continuous casting roller roll surface method for cleaning and device thereof, particularly a kind of cleaning twin-roll thin strip concasting roller surface method and device that detects that continuous casting roller roll surface temperature changes and roll surface is cleared up automatically that utilize.
Background technology: the twin-roll thin strip continuous casting technical development has had the history in more than 100 year, belong to the inferior continuous casting process of cooling fast category, different with traditional continuous casing, this method need not passed through the multiple tracks hot-rolled process, can simplify the strip production technology greatly and reduce equipment investment.In addition, because the setting time of metal is shorter in the whole production process, so the intensity of the refinement of thin strap continuous casting product grains, material, toughness percentage elongation increase, setting rate also helps suppressing elements segregation soon simultaneously.The subject matter that present this technology exists: because thin strap continuous casting band steel setting rate is than very fast, domestic and international research mechanism utilizes the research of analogue simulation binding entity experimental provision to solve the problem that becomes band basically at present, but most product is not to exist some quality part not fully up to expectations, is exactly that more single steel grade of product and specification are restricted.In addition, because the molten steel of its melting is very fast in the cooling velocity of continuous casting roller roll surface,, can influences the heat conduction intensity of continuous casting roller, and then have influence on casting strip quality so have a lot of metal oxides or other impurity can separate out very soon and cohere on continuous casting roller roll surface.Because their distribution is random, so to a certain degree influence is evenly also arranged for the heat transfer of roll surface.So must clean out these impurity particles fast and accurately simultaneously in casting, can guarantee the key of thin strap continuous casting Cast Strip quality.A kind of roll surface cleaning plant of mentioning among existing technology such as the Chinese patent 200420107544.x, use be that metallic spatula is adjacent to roll surface scraping roll surface residue, utilize the spring at scraper rear portion that pressure is provided.This method is violent to continuous casting roller roll surface wear, and is subjected to structural limitations and can not clears up the small metal oxide of roll surface.All use the metal brush roll to carry out the roll surface cleaning on most of external thin strip continuous casting devices.The form of brush roll is varied, and the method that acts on continuous casting roller roll surface is also different, but purpose all is to utilize brush roll can clear up less foreign material particle.Purpose is in order to improve or change the heat transfer coefficient of roll surface.Because the metal bristle is difficult for wearing and tearing, resistance to oxidation, long service life is so application is more extensive.The method of mentioning among the Japan Patent JP2000280049 is by temperature scanning is carried out in the Cast Strip, it is big to analyze which part Cast Strip temperature and mean temperature deviation, then use on the roll surface cleaning hairbrush pair of rollers corresponding site to clear up, guarantee the heat transfer coefficient unanimity of roll surface, the final uniform quality that guarantees the surface, Cast Strip, but the temperature on surface, Cast Strip can not embody the concrete condition of roll surface conscientiously, thus controllability relatively a little less than.
Summary of the invention: the purpose of this invention is to provide a kind of cleaning twin-roll thin strip concasting roller surface method and device, solve the existing more weak technical problem of method for cleaning controllability.Thinking of the present invention is: in the thin strap continuous casting production process, because the continuous casting roller directly contacts with molten steel, raise gradually until reaching stable process so the temperature of continuous casting roller roll surface should be one, this temperature curve is relevant with liquid level H in continuous casting roller material h, continuous casting roller speed V, continuous casting roller cooling water flow Q, casting steel grade and the molten bath.It is as follows to be reduced to a formula:
T＝f( h，V，Q，H)
In the thin strap continuous casting casting cycle, the roll surface cleaning plant that uses a cover to have the active rotation brush roll is cleared up the continuous casting roller, clean-up intensity changes according to continuous casting roller roll surface temperature to be decided, remove metal and oxide that roll surface is stained with, improve roll surface heat conduction intensity, make the roll surface thermal conductivity factor even, and then boost productivity, improve casting strip quality.
Technical scheme of the present invention is: a kind of cleaning twin-roll thin strip concasting roller surface method may further comprise the steps:
A, at the casting initial stage, the brush roll device is pressed in continuous casting roller surface, displacement transducer initialize x
0
If the b system issues the deviation signal that sensor changes displacement, it can make the driving servo valve make the hydraulic cylinder action by driver element, until reaching new shift value x=x
0+ Δ x;
What c, system kept scans continuous casting roller roll surface temperature, aim curve with scanning curve and setting compares then, if trend unanimity, then under existing brush roll device thrust condition, continue cleaning, in case the trend anomaly of the aim curve of scanning curve and setting then enters into next link.
D, verify that whether the cooling water temperature of continuous casting roller also occurs unusually.
If the e cooling water temperature occurs unusual, controller can calculate the offset deviation amount of brush roll needs and issue displacement transducer according to formula, and it drives the hydraulic cylinder action, and control program continues circulation.
If the f cooling water temperature is not unusual, need that the data of roll surface temperature scanning curve are carried out filtering and handle, the hydraulic cylinder displacement change departure that controller is required according to filtered data computation cleaning plant is ordered about hydraulic cylinder then and is carried out corresponding action.
The cleaning twin-roll thin strip concasting roller surface device, comprise two identical roll surface cleaning mechanism of cover and control modules, two cover roll surface cleaning mechanisms are separately positioned on the both sides of two continuous casting rollers, two cover roll surface cleaning mechanisms link to each other by control module, the roll surface cleaning mechanism is by brush roll, motor, the brush roll support, hydraulic cylinder, the dust collection case, bearing, dust collection, roll surface purges cooling device, the temperature scanning instrument, continuous casting roller water temperature detecting sensor constitutes, brush roll is fixed on brush roll support front end and is fixed on the brush roll carriage motor passes through belt transmission, the brush roll support is fixed on the bearing of dust collection case face, brush roll support tail end connects with hydraulic cylinder is rotatable, the other end of hydraulic cylinder is fixed on dust collection box body side, dust collection is installed in the dust collection case, its dust collection mouth is arranged on the brush roll below, below the continuous casting roller, be provided with roll surface and purge cooling device, the temperature scanning instrument that is fixed on the conticaster is arranged near continuous casting roller position, continuous casting roller coolant outlet place is provided with the water temperature detecting sensor, hydraulic cylinder is connected with control module by servo valve, the hydraulic cylinder rear portion has displacement transducer, temperature scanning instrument and continuous casting roller water temperature detecting sensor pass to detected roll surface temperature signal and cooling water temperature signal respectively the 1# comparator and the 2# comparator of control module, import master controller PLC relatively respectively, the roll surface temperature change curve that obtains and water temperature change curve and given experience curve are compared, the output signal of master controller PLC passes to servo valve by driver, the displacement action of control hydraulic cylinder, the drafts of roll surface cleaning plant is increased or reduce, thereby change the intensity of roll surface cleaning.
The invention has the beneficial effects as follows: directly according to the intensity of the timely online change roll surface cleaning of roll surface temperature situation of change, roll surface cleaning situation is intuitively controlled, improves the property monitored of roll surface situation; The roll surface temperature curve is decided applied range, precision height according to difference casting parameter.Continuous casting roller water temperature deviation is as being incorporated in the control system calibrating signal, and the inaccurate situation of the roll surface temperature curve detection that occurs in the time of can avoiding abnormal conditions occurring in the casting machine casting cycle takes place, and improves control system precision and reliability greatly.Utilize roll surface purging cooling device prepurge oxide and adhesive to help the roll surface cleaning, improve the service efficiency of brush roll, can improve cleaning quality simultaneously, be beneficial to adhesive and come off from continuous casting roller and brush roll, reduce the wear extent of brush roll bristle, prolong the brush roll life-span.The dust that subsidiary dust arrester cleaning is peeled off is avoided contaminated environment.
Description of drawings:
Fig. 1 is a cleaning twin-roll thin strip concasting roller surface apparatus structure schematic diagram of the present invention
Fig. 2 is the programme-control block diagram of roll surface method for cleaning of the present invention
Among the figure: 1-hydraulic cylinder, 2-brush roll support, 3-motor, 4-brush roll 5-continuous casting roller 6-continuous casting roller water temperature detecting sensor, the 7-roll surface purges cooling device, 8-1-dust collection case, the 8-2-dust collection, 9-temperature scanning instrument, 10-1-1# comparator, the 10-2-2# comparator, 11-master controller PLC, 12-servo valve driver, the 13-servo valve, the 14-displacement transducer, 15-frame, 16-control module.
Fig. 3 is the typical temperature profile of thin strap continuous casting
The specific embodiment: with reference to Fig. 1,2, the cleaning twin-roll thin strip concasting roller surface device, comprise two identical roll surface cleaning mechanism of cover and control modules 16, two cover roll surface cleaning mechanisms are separately positioned on the both sides of two continuous casting rollers 5, two cover roll surface cleaning mechanisms link to each other by control module 16, the roll surface cleaning mechanism is by brush roll 4, motor 3, brush roll support 2, hydraulic cylinder 1, dust collection case 8-1, bearing 15, dust collection 8-2, roll surface purges cooling device 7, temperature scanning instrument 9, continuous casting roller water temperature detecting sensor 6 constitutes, brush roll 4 is fixed on brush roll support 2 front ends and is fixed on that motor 3 passes through belt transmission on the brush roll support, brush roll support 2 is fixed on the frame 15, brush roll support tail end and 1 rotatable connection of hydraulic cylinder, the other end of hydraulic cylinder is fixed on dust collection box body side, dust collection 8-2 is installed in the dust collection case, its dust collection mouth is arranged on brush roll 4 belows, below the continuous casting roller, be provided with roll surface and purge cooling device 7, the temperature scanning instrument 9 that is fixed on the conticaster is arranged near continuous casting roller position, temperature scanning instrument 9 is an infrared scanner, continuous casting roller coolant outlet place is provided with continuous casting roller water temperature detecting sensor 6, hydraulic cylinder 1 is connected with control module 16 by servo valve 13, the hydraulic cylinder rear portion has displacement transducer 14, temperature scanning instrument 9 and continuous casting roller water temperature detecting sensor 6 pass to detected roll surface temperature signal and coolant water temperature signal respectively the 1# comparator 10-1 and the 2# comparator 10-2 of control module, import master controller PLC 11 relatively respectively, the temperature variation curve that obtains and water temperature change curve and given experience roll surface temperature experience curve are compared, the output signal of master controller PLC passes to servo valve 13 by servo valve driver 12, thereby displacement action by servo valve control hydraulic cylinder 1, the drafts of roll surface cleaning plant is increased or reduce, thereby change the intensity of roll surface cleaning.
The present invention is applicable to the metal Cast Strip with double-roll type strip caster cast thickness 1.5-5mm, method for cleaning is: brush roll 4 is by motor 3 transmissions, rotation direction is with continuous casting roller unanimity, roll surface purges 7 pairs of continuous casting roller 5 surfaces of cooling device and carries out prepurge to reduce the temperature of impurity adhesive, reduce the adhesive force of adhesive, temperature scanning instrument 9 is along continuous casting roller 5 axially real-time measuring roll surface temperatures, obtain the time dependent curve of actual roll surface temperature, compare with given experience roll surface temperature experience curve among the comparator 10-1 in control module, obtain the temperature variation deviation in the certain hour, by the calculating of master controller PLC 11, the feedback signal-current displacement x of while reference bit displacement sensor 14
1, x
2Made hydraulic cylinder 1 make corresponding change in displacement Δ x by servo valve driver 12, the drafts of roll surface cleaning plant is increased or reduce, thereby changed the intensity of roll surface cleaning, the experience curve that the variable quantity convergence of roll surface temperature rising curve is presetted, stable to guarantee casting.Dust collection 8-2 reclaims scraping the oxide powder that chips away, and prevents contaminated environment.For fear of abnormal conditions such as unexpected signal interference or short time level fluctuations the roll surface temperature curve is caused interference, the detection signal of continuous casting roller cooling-water temperature sensor 6 imports among the master controller PLC 11 as a compensating signal, if fluctuating temperature is synchronous with the roll surface fluctuation, it is normal to illustrate that then roll surface detects, if it is asynchronous, then explanation has abnormal conditions to occur, and Nei roll surface temperature need carry out participating in control again after the filtering processing during this period of time.Concrete control step is as follows:
(1) utilize the temperature scanning instrument 9 real-time detected continuous casting roller roll surface temperature data be installed on the casting machine and temperature rise trend and target value set to compare, after detecting temperature deviation, directly regulate the thrust of brush roll 4 by hydraulic cylinder 1, the clean-up intensity of online adjusting roll surface cleaning plant, make roll surface actual temperature convergence target temperature value, reach the purpose of stable casting.
(2) the roll surface cleaning tool is a metal brush roll 4, adopt motor 3 transmissions, the distance of hydraulic cylinder 1 online adjusting brush roll and continuous casting roller roll surface, the stroke of hydraulic cylinder 1 is measured and is transferred to master controller PLC 11 by the displacement transducer 14 of cylinder back and handles, and change pressure between brush roll 4 and the continuous casting roller 5 with this, the ground effect of the big then bristle of pressure is good, and roll surface heat conduction intensity improves, on the contrary difference.
Brush roll 4 adopts the copper wire of 0.15-0.2mm or wire clip to twine in steel tank and is welded on the mandrel, or with the copper wire of 0.15-0.2mm or wire clip in steel tank, be made into disk and pursue and be pressed on the brush roll mandrel.
(3) adopt roll surface to purge 7 pairs of continuous casting rollers of cooling device surface and carry out prepurge to reduce the temperature of adhesive, reduce adhesive force, be beneficial to cleaning, cooling medium is an inert gas, as argon Ar or nitrogen N
2
(4) in the casting cycle, continuous casting roller water temperature deviation signal as a comparison seals in the control system, and purpose is that the roll surface temperature of avoiding abnormal conditions to cause detects the affected situation generation of trend, improves the precision and the reliability of control system.
(5) adopt temperature scanning instrument 9 to detect continuous casting roller roll surface temperature, every 50s gathers one group of data.
(6) the roll surface powder that cleans is cleared up by near dust collection case 8-1, the dust collection 8-2 that is installed in the brush roll, avoids environmental pollution.
(7) the temperature variation curve desired value binding isotherm calculated value of continuous casting roller roll surface is set mutually with the in-site measurement value, and liquid level H etc. has related parameter in corresponding different continuous casting roller material h, continuous casting roller speed V, continuous casting roller cooling water flow Q, casting steel grade and the molten bath.Temperature curve can be by corresponding business software ANSYS analog computation, still owing to the molten bath inner boundary coefficient of heat transfer in the thin strap continuous casting is difficult to accurately obtain, so theoretical curve is merely able to provide the temperature rise trend and the Temperature Distribution scope of macroscopic view at present; Though the experimental data that records in the casting process is accurate, but the influence that can be subjected to extraneous condition of uncertainty is fluctuateed, so, need on the basis of theoretical calculated curve to obtain in all previous experimentation data carry out modified quasi and, and then obtain revised experience curve.T=f (h, V, Q, H); Typical temperature curve as shown in Figure 3, as can be seen from the figure, theoretical temperatures curve and experimental temperature curve all can not directly utilize as the empirical temperature curve, must carry out correcting process.
Claims (4)
1, a kind of cleaning twin-roll thin strip concasting roller surface method may further comprise the steps:
A, at the casting initial stage, the brush roll device is pressed in continuous casting roller surface, it is x that displacement transducer is composed initial value
0,
If the b system issues the deviation signal that sensor changes displacement, it will make the driving servo valve make the hydraulic cylinder action by driver element, until reaching new shift value x=x
0+ Δ x,
What c, system kept scans continuous casting roller roll surface temperature, aim curve with scanning curve and setting compares then, if trend unanimity, then under existing brush roll device thrust condition, continue cleaning, in case the trend anomaly of the aim curve of scanning curve and setting, then enter into next link
D, verify that whether the cooling water temperature of continuous casting roller also occurs unusually,
If the e cooling water temperature occurs unusual, controller can calculate the offset deviation amount of brush roll needs and issue displacement transducer according to formula, and it drives the hydraulic cylinder action, and control program continues circulation,
If the f cooling water temperature is not unusual, need that the data of roll surface temperature scanning curve are carried out filtering and handle, the hydraulic cylinder displacement change departure that controller is required according to filtered data computation cleaning plant is ordered about hydraulic cylinder then and is carried out corresponding action.
2, the device that the described method for cleaning of claim 1 adopts, it is characterized in that, comprise two identical roll surface cleaning mechanism of cover and control modules, two cover roll surface cleaning mechanisms are separately positioned on the both sides of two continuous casting rollers, two cover roll surface cleaning mechanisms link to each other by control module, the roll surface cleaning mechanism is by brush roll, motor, the brush roll support, hydraulic cylinder, the dust collection case, dust collection, the temperature scanning instrument, continuous casting roller water temperature detecting sensor constitutes, brush roll is fixed on brush roll support front end and is fixed on the brush roll carriage motor passes through belt transmission, the brush roll support is fixed on the bearing of dust collection case face, brush roll support tail end connects with hydraulic cylinder is rotatable, the other end of hydraulic cylinder is fixed on dust collection box body side, dust collection is installed in the dust collection case, its dust collection mouth is arranged on the brush roll below, the temperature scanning instrument that is fixed on the conticaster is arranged near continuous casting roller position, continuous casting roller coolant outlet place is provided with continuous casting roller water temperature detecting sensor, hydraulic cylinder is connected with control module by servo valve, and the hydraulic cylinder rear portion has displacement transducer.
3, cleaning plant according to claim 2 is characterized in that, the roll surface cleaning mechanism comprises that also roll surface purges cooling device, and roll surface purges cooling device and is arranged on continuous casting roller below.
4, cleaning plant according to claim 2, it is characterized in that, temperature scanning instrument and continuous casting roller water temperature detecting sensor pass to detected roll surface temperature signal and coolant water temperature signal respectively the 1# comparator and the 2# comparator of control module, import master controller PLC relatively respectively, the temperature variation curve that obtains and water temperature change curve and given experience roll surface temperature experience curve are compared, the output signal of master controller PLC passes to servo valve by the servo valve driver, thereby displacement action by servo valve control hydraulic cylinder, the drafts of roll surface cleaning plant is increased or reduce, thereby change the intensity of roll surface cleaning.
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|---|---|---|---|
| CNB2006100250661A CN100493775C (en) | 2006-03-24 | 2006-03-24 | Method and device for cleaning twin-roll thin strip continuous casting roller surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100250661A CN100493775C (en) | 2006-03-24 | 2006-03-24 | Method and device for cleaning twin-roll thin strip continuous casting roller surface |
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| Publication Number | Publication Date |
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| CN101041176A true CN101041176A (en) | 2007-09-26 |
| CN100493775C CN100493775C (en) | 2009-06-03 |
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| CNB2006100250661A Active CN100493775C (en) | 2006-03-24 | 2006-03-24 | Method and device for cleaning twin-roll thin strip continuous casting roller surface |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463328A (en) * | 2010-11-08 | 2012-05-23 | 上海宝信软件股份有限公司 | Method and device for monitoring state of crystallized rollers |
| CN102950276A (en) * | 2011-08-30 | 2013-03-06 | 宝山钢铁股份有限公司 | Method and device for cleaning surface of dual-roller thin-strip casting roll |
| WO2018119551A1 (en) * | 2016-12-26 | 2018-07-05 | 宝山钢铁股份有限公司 | Casting roller surface cleaning device and method |
| CN109656191A (en) * | 2018-11-03 | 2019-04-19 | 潍坊弗莱瑞电子科技有限公司 | It is a kind of for extending the control system of the soft roller roll surface service life of roller class pressure area |
| CN111649597A (en) * | 2020-06-10 | 2020-09-11 | 武汉钢铁有限公司 | Furnace roller cleaning method and device of CSP production line |
| CN112157229A (en) * | 2020-09-07 | 2021-01-01 | 东北大学 | Roll surface cleaning device for thin strip continuous casting and control method and control device thereof |
-
2006
- 2006-03-24 CN CNB2006100250661A patent/CN100493775C/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463328A (en) * | 2010-11-08 | 2012-05-23 | 上海宝信软件股份有限公司 | Method and device for monitoring state of crystallized rollers |
| CN102463328B (en) * | 2010-11-08 | 2015-04-29 | 上海宝信软件股份有限公司 | Device for monitoring state of crystallized rollers |
| CN102950276A (en) * | 2011-08-30 | 2013-03-06 | 宝山钢铁股份有限公司 | Method and device for cleaning surface of dual-roller thin-strip casting roll |
| CN102950276B (en) * | 2011-08-30 | 2014-10-01 | 宝山钢铁股份有限公司 | Method and device for cleaning surface of dual-roller thin-strip casting roll |
| WO2018119551A1 (en) * | 2016-12-26 | 2018-07-05 | 宝山钢铁股份有限公司 | Casting roller surface cleaning device and method |
| CN109656191A (en) * | 2018-11-03 | 2019-04-19 | 潍坊弗莱瑞电子科技有限公司 | It is a kind of for extending the control system of the soft roller roll surface service life of roller class pressure area |
| CN111649597A (en) * | 2020-06-10 | 2020-09-11 | 武汉钢铁有限公司 | Furnace roller cleaning method and device of CSP production line |
| CN111649597B (en) * | 2020-06-10 | 2022-05-03 | 武汉钢铁有限公司 | Furnace roller cleaning method and device of CSP production line |
| CN112157229A (en) * | 2020-09-07 | 2021-01-01 | 东北大学 | Roll surface cleaning device for thin strip continuous casting and control method and control device thereof |
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|---|---|
| CN100493775C (en) | 2009-06-03 |
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