CN101683686B - On-line width adjusting method for crystallizer - Google Patents
On-line width adjusting method for crystallizer Download PDFInfo
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- CN101683686B CN101683686B CN2009102050663A CN200910205066A CN101683686B CN 101683686 B CN101683686 B CN 101683686B CN 2009102050663 A CN2009102050663 A CN 2009102050663A CN 200910205066 A CN200910205066 A CN 200910205066A CN 101683686 B CN101683686 B CN 101683686B
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Abstract
The invention discloses an on-line width adjusting method for a crystallizer, which comprises the following steps: a judging step, a width adjusting step and a narrow adjusting step. The method can perform zero setting on the crystallizer and quickly adjust the crystallizer to a cast-on width; the on-line width adjustment is safer and more reliable; and the response is quick and accurate.
Description
The application is 200710042974.6 for application number, and denomination of invention is " crystallizer on-line width modulation system and a method thereof ", and the applying date is the dividing an application of application for a patent for invention on June 28th, 2007.
Technical field
The present invention relates to on-line width adjusting method for crystallizer.
Background technology
In continuous casting steel billet was produced, for adapting to the products of different specifications needs, treating with leniency of crystallizer often needed adjustment.Traditional adjustment mode is to stop casting, manual adjustment crystallizer width or replacing crystallizer.Traditional regulative mode is that conticaster is shut down, and needs secondary to open to carry out under the situation of watering, and this just causes raw material and temporal loss.Lower production efficiency greatly, increased production cost.The different slab of casting continuous casting width need change the crystallizer width and disconnected shortcoming of watering in the cast in the past in order to overcome, and iron and steel producer has developed the technology that in casting cycle, moves the crystallizer minor face and change width of plate slab, is called for short crystallizer on-line width modulation.Native system just is being based on the system of crystallizer on-line width modulation technique construction.But this system has direct casting different in width slab; Reduce the width of cloth amount of cutting of strand width and can realize continuous casting ejection width and rolling order series of advantages such as match; For high-quality, efficient, high yield have been created advantage; For reducing production costs, improve environmental quality, improve the competitiveness of product in market and have very important meaning.
Summary of the invention
The objective of the invention is to, a kind of on-line width adjusting method for crystallizer is provided.
For reaching above-mentioned purpose, the present invention adopts following technical scheme: a kind of on-line width adjusting method for crystallizer may further comprise the steps:
The A determination step
A1, based on two crystallizers current actual value and final goal value, and set one or more phase targets values based on actual value and final goal value, said phase targets value is between actual value and desired value;
A2, set a desired value be in phase targets value and the final goal value towards final goal value direction and with the immediate value of current actual value, take a decision as to whether and transfer wide or transfer narrowly, if transfer widely, then get into step B, if narrow, then change step C for transferring;
B transfers wide step
B1, translation move horizontally crystallizer;
The width on minor face between two crystallizers or long limit is kept in B2, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
The tapering between two crystallizers is kept in B3, amplitude modulation, regulates the relative distance between two crystallizers towards next desired value;
The width of growing limit or minor face between two crystallizers is kept in B4, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
B5, judge whether to reach the final goal value, if then finish adjustment; Otherwise, set a desired value and be in phase targets value and the final goal value towards final goal value direction and with the immediate value of current actual value, change step B1;
C transfers narrow step
The width on minor face between two crystallizers or long limit is promptly kept in C1, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
The tapering between two crystallizers is promptly kept in C2, amplitude modulation, regulates the relative distance between two crystallizers towards next desired value;
The width of growing limit or minor face between two crystallizers is promptly kept in C3, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
C4, judge whether to reach the final goal value, if then finish adjustment; Otherwise, set a desired value and be in phase targets value and the final goal value towards final goal value direction and with the immediate value of current actual value, change step C1.
On-line width adjusting method for crystallizer also comprises transient target value setting step, and this transient target value is to transfer in the wide process desired value in each scan period at crystallizer.
On-line width adjusting method for crystallizer provided by the invention; Through transferring the wide steps such as cone adjusting, amplitude modulation, translation that are decomposed into; Guaranteed that the pressure that the base shell bears was both low and even, the air gap that produces between eliminating in transferring wide process between strand and crystallizer prevents bleed-out accident and casting blank defect.And control accuracy improves greatly, has effectively reduced the probability of happening and the slab defect of runout incident.
Description of drawings
Fig. 1 is the crystallizer on-line width modulation system structural representation;
Fig. 2 is the mould at narrow structural map;
Fig. 3 is the graphs of a relation of three kinds of desired values (final goal value, phase targets value, transient target value) in control procedure;
Fig. 4 transfers narrow step sketch map for crystallizer;
Fig. 5 transfers wide step sketch map for crystallizer;
Fig. 6 is the graph of a relation between speed about the minor face in the cone adjusting process.
The specific embodiment
Embodiment one
As shown in Figure 1, a kind of crystallizer on-line width modulation system comprises,
Two crystallizers that are provided with in opposite directions are located at the two crystallizers outside and are accepted control signal to regulate the drive unit of width between two crystallizers;
The absolute value encoder circuit is used to gather the actual value of crystallizer position and export;
Programmable controller (PLC) links to each other with the absolute value encoder circuit, accepts the desired value of this actual value and outside input, and based target value and actual value output control signals to drive unit;
Wherein, said drive unit comprises that the rapid answer valve reaches and the pneumatic step-by-step movement electric hydaulic cylinder (abbreviation step-by-step cylinder) that is connected of said rapid answer valve, and said step-by-step cylinder is connected with said crystallizer.The model that said rapid answer valve QSV can adopt factory of Japanese iron and steel scientific & technical corporation (JP Steel Plantech Co. is called for short JSP) to produce is the product of HS-G01-AR-D2B-1.
Wherein, said drive unit has quadruplet, and every cover is located at locating near two ends of two said crystallizers respectively.The quadruplet drive unit works alone separately.
Wherein, Also comprise process control server (L2), execute-in-place panel, man-machine interface (HMI); Said programmable controller (PLC) comprises first programmable controller and second programmable controller; Said first programmable controller (CP-317) is connected with server (L2), man-machine interface (HMI), execute-in-place panel; Be used for accomplishing and the exchange of process control data in server, and the creation data of setting through man-machine interface, and with the communication of execute-in-place panel and demonstration field data in real time on the guidance panel at the scene.Said second programmable controller (CP-9200SH4) is connected with first programmable controller; According to the fireballing characteristics of CP-9200SH4; Gather the actual value of the crystallizer position of absolute value encoder circuit output in real time, carry out Real-time and Dynamic control to the real time monitoring of field equipment state and crystallizer control procedure and to the position of crystallizer minor face.Promptly accept the desired value of first programmable controller input,, output control signals to drive unit according to desired value and actual value.
Wherein, said first programmable controller (CP-317) is connected through Ethernet etc. with adopting being connected of server (L2), man-machine interface (HMI) such as hub (HUB) etc. as required.
Crystallizer is transferred wide desired value to go up directly input from HMI by operating personnel and is passed to CP-317 through Ethernet; Also can through Ethernet desired value be passed to CP-317 by host computer; CP-317 receives and desired value is converted into target axle place value after the data and passes to CP-9200SH4 together with desired value through CP-215, supplies control to use.
Begin to transfer wide instruction in case operating personnel send, data reach the CP-9200SH4 that is responsible for control according to above-mentioned approach, and this PLC responds immediately, and comparison object value and actual value are made and transferred the wide narrow judgement of still transferring.In the control procedure; CP-9200SH4 will be converted into the step-by-step cylinder position actual value by the pulse value that the scene feeds back via counter through the absolute value encoder circuit; Constantly compare with the transient target value of calculating gained through above-mentioned formula, rapid answer valve (QSV) is rapidly opened and closed according to this comparative result, adjustment step-by-step cylinder translational speed; All arrive the final goal value up to two crystallizers, transfer wide process to finish.
Embodiment two
A kind of on-line width adjusting method for crystallizer is characterized in that may further comprise the steps:
1) current actual value and the final goal value of two crystallizers relatively takes a decision as to whether and transfers wide or transfer narrowly, if transfer widely, then gets into step 2), if narrow, then change step 3) for accent;
2) translation promptly moves horizontally crystallizer;
3) width on minor face between two crystallizers or long limit is promptly kept in cone adjusting, adjusts the tapering between two crystallizers towards the final goal value;
4) tapering between two crystallizers is promptly kept in amplitude modulation, regulates the relative distance between two crystallizers towards the final goal value;
5) width of growing limit or minor face between two crystallizers is promptly kept in cone adjusting, adjusts the tapering between two crystallizers towards the final goal value;
6) when actual value is equal with the final goal value, finish adjustment, otherwise change step 1).
Wherein, the final goal value is that crystallizer is transferred wide target setting value, can set through HMI input or process control server L2.
Embodiment three
A kind of on-line width adjusting method for crystallizer may further comprise the steps:
The A determination step
A1, actual value and the final goal value current according to two crystallizers, and set one or more phase targets values according to actual value and final goal value, said phase targets value is between actual value and desired value; Through the phase targets value of setting, feasible adjustment to crystallizer can be divided into a plurality of steps and accomplish.The phase targets value can be set according to mechanical parameter, current actual value and final goal value etc. are concrete.
A2, set a desired value be in phase targets value and the final goal value towards final goal value direction and with the immediate value of current actual value, take a decision as to whether and transfer wide or transfer narrowly, if transfer widely, then get into step B, if narrow, then change step C for transferring;
B transfers wide step (referring to Fig. 4)
B1, translation, promptly level is moved crystallizer;
The width on minor face between two crystallizers or long limit is promptly kept in B2, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
The tapering between two crystallizers is promptly kept in B3, amplitude modulation, regulates the relative distance between two crystallizers towards next desired value;
The width of growing limit or minor face between two crystallizers is promptly kept in B4, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
B5, judge whether to reach the final goal value, if then finish adjustment; Otherwise, set a desired value and be in phase targets value and the final goal value towards final goal value direction and with the immediate value of current actual value, change step B1.
C transfers narrow step (referring to Fig. 5)
The width on minor face between two crystallizers or long limit is promptly kept in C1, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
The tapering between two crystallizers is promptly kept in C2, amplitude modulation, regulates the relative distance between two crystallizers towards next desired value;
The width of growing limit or minor face between two crystallizers is promptly kept in C3, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
C4, judge whether to reach the final goal value, if then finish adjustment; Otherwise, set a desired value and be in phase targets value and the final goal value towards final goal value direction and with the immediate value of current actual value, change step C1.
Wherein, the final goal value is that crystallizer is transferred wide target setting value, can set through HMI input or process control server L2.
Wherein, also comprise transient target value setting step, this value is to transfer in the wide process at crystallizer, and the desired value in each scan period, this desired value are to confirm jointly according to the moving direction of the setting translational speed of drive unit (step-by-step cylinder), crystallizer minor face.
This on-line width adjusting method for crystallizer embodiment is the coefficient control procedures of above three kinds of desired values (final goal value, phase targets value, transient target value).The relation of three kinds of desired values in control procedure is as shown in Figure 3.Wherein:
PV: actual value SV: setting value
W0: amplitude initial value T0: tapering initial value
TS: scan period number EF: final goal value
EP: phase targets value ET: transient target value.
Below be example to transfer the first step cone adjusting in the narrow process, further specify the present invention.As shown in Figure 6, wherein, V
C: casting speed; V
TBe crystallizer upper end step-by-step cylinder speed; V
BBe crystallizer lower end step-by-step cylinder speed.
For keeping crystallizer lower end amplitude constant, upper and lower step-by-step cylinder needs to move with different speed.The calculating of step-by-step cylinder speed and transient target value thereof is shown in following formula:
V
T＝V
S(mm/min) (1)
V
B＝V
S×L
3/(L
2+L
3)(mm/min) (2)
Δ
T＝C×V
T÷60×T
S×10
-4(mm)(3)
Δ
B＝C×V
B÷60×T
S×10
-4(mm)(4)
E
T-T＝S
T-ORI-∑Δ
T(mm) (5)
E
B-T＝S
B-ORI-∑Δ
B(mm) (6)
Wherein:
V
S: step-by-step cylinder setting speed (mm/min); V
T: upper end step-by-step cylinder translational speed (mm/min);
V
B: lower end step-by-step cylinder translational speed (mm/min); L
2, L
3: be the mechanical parameter of crystallizer minor face;
Δ
T: each scan period upper end step-by-step cylinder gain (mm); C: adjustment constant;
Δ
T: each scan period lower end step-by-step cylinder gain (mm); T
S: the scan period (ms);
E
T-T: each scan period upper end step-by-step cylinder transient target value; S
T-ORI: upper end step-by-step cylinder initial position value;
E
B-T: each scan period lower end step-by-step cylinder transient target value; S
B-ORI: lower end step-by-step cylinder initial position value;
In control procedure; The translational speed of the upper and lower step-by-step cylinder of confirming according to formula (1), (2) calculates the moving target value of upper and lower step-by-step cylinder in each scan period; Calculate upper and lower step-by-step cylinder respectively in the absolute object value of each scan period according to formula (5), (6) again, that is the transient target value of upper and lower step-by-step cylinder in each scan period.To constantly carry out size relatively by scene step-by-step cylinder actual position value that feeds back and the transient target value of calculating gained through above-mentioned formula; Rapid answer valve (QSV) is rapidly opened and closed according to this comparative result; Adjustment step-by-step cylinder translational speed is advanced the cylinder position value up to upper and lower stepping and is all arrived the phase targets value, and cone adjusting finishes; Get into the second stage of adjustment, i.e. amplitude modulation.
Other step in the present embodiment, for example amplitude modulation etc., except that upper and lower step-by-step cylinder speed with desired value is different; Its control procedure basically identical; Those skilled in the art need not creative work and just can associate according to the description of the narrow process of above-mentioned accent, therefore omit the description to this part.
Claims (2)
1. on-line width adjusting method for crystallizer is characterized in that may further comprise the steps:
The A determination step
A1, based on two crystallizers current actual value and final goal value, and set one or more phase targets values based on actual value and final goal value, said phase targets value is between actual value and final goal value;
A2, set a desired value be in phase targets value and the final goal value towards final goal value direction and with the immediate value of current actual value, take a decision as to whether and transfer wide or transfer narrowly, if transfer widely, then get into step B, if narrow, then change step C for transferring;
B transfers wide step
B1, translation move horizontally crystallizer;
The width on minor face between two crystallizers or long limit is kept in B2, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
The tapering between two crystallizers is kept in B3, amplitude modulation, regulates the relative distance between two crystallizers towards next desired value;
The width of growing limit or minor face between two crystallizers is kept in B4, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
B5, judge whether to reach the final goal value, if then finish adjustment; Otherwise, set a desired value and be in phase targets value and the final goal value towards final goal value direction and with the immediate value of current actual value, change step B1;
C transfers narrow step
The width on minor face between two crystallizers or long limit is promptly kept in C1, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
The tapering between two crystallizers is promptly kept in C2, amplitude modulation, regulates the relative distance between two crystallizers towards next desired value;
The width of growing limit or minor face between two crystallizers is promptly kept in C3, cone adjusting, adjusts the tapering between two crystallizers towards next desired value;
C4, judge whether to reach the final goal value, if then finish adjustment; Otherwise, set a desired value and be in phase targets value and the final goal value towards final goal value direction and with the immediate value of current actual value, change step C1.
2. on-line width adjusting method for crystallizer according to claim 1 is characterized in that: also comprise transient target value setting step, this transient target value is to transfer in the wide process desired value in each scan period at crystallizer.
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| CN2009102050663A CN101683686B (en) | 2007-06-28 | 2007-06-28 | On-line width adjusting method for crystallizer |
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| CN2007100429746A Division CN101334672B (en) | 2007-06-28 | 2007-06-28 | Crystallizer on-line width modulation system |
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| CN101683686B true CN101683686B (en) | 2012-01-11 |
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Cited By (2)
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| CN104942250A (en) * | 2014-03-26 | 2015-09-30 | 上海宝信软件股份有限公司 | Online continuous casting billet preset width setting and tracking method |
| CN110947924A (en) * | 2018-09-27 | 2020-04-03 | 上海宝信软件股份有限公司 | On-line thermal width adjusting method suitable for crystallizer |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102240787B (en) * | 2011-08-15 | 2013-08-14 | 中冶南方工程技术有限公司 | Method for increasing online adjusting width of continuous casting crystallizer within large range |
| CN102240782B (en) * | 2011-08-15 | 2013-08-14 | 中冶南方工程技术有限公司 | Method for reducing online adjusting width of continuous casting crystallizer within small range |
| CN102240783B (en) * | 2011-08-15 | 2013-08-14 | 中冶南方工程技术有限公司 | Online adjusting method for extensively reducing width of continuous casting mold |
| CN102240788B (en) * | 2011-08-15 | 2013-09-18 | 中冶南方工程技术有限公司 | Online width-increasing adjustment method for continuous casting crystallizer in small range |
| CN106270436B (en) * | 2016-09-20 | 2018-06-29 | 中冶连铸技术工程有限责任公司 | A kind of method for improving the wide precision of crystallizer tune |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104942250A (en) * | 2014-03-26 | 2015-09-30 | 上海宝信软件股份有限公司 | Online continuous casting billet preset width setting and tracking method |
| CN104942250B (en) * | 2014-03-26 | 2017-08-11 | 上海宝信软件股份有限公司 | The method of continuous casting billet online presetting wide setting and tracking |
| CN110947924A (en) * | 2018-09-27 | 2020-04-03 | 上海宝信软件股份有限公司 | On-line thermal width adjusting method suitable for crystallizer |
| CN110947924B (en) * | 2018-09-27 | 2021-07-20 | 上海宝信软件股份有限公司 | On-line thermal width adjusting method suitable for crystallizer |
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