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CN101683686A - On-line width adjusting method for crystallizer - Google Patents

On-line width adjusting method for crystallizer Download PDF

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Publication number
CN101683686A
CN101683686A CN200910205066A CN200910205066A CN101683686A CN 101683686 A CN101683686 A CN 101683686A CN 200910205066 A CN200910205066 A CN 200910205066A CN 200910205066 A CN200910205066 A CN 200910205066A CN 101683686 A CN101683686 A CN 101683686A
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value
target value
crystallizers
crystallizer
taper
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CN101683686B (en
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阳玉平
林富贵
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Shanghai Baosight Software Co Ltd
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Abstract

一种结晶器在线调宽方法，包括以下步骤：判定步骤、调宽步骤以及调窄步骤，本发明可对结晶器进行调零及将其快速调至开浇宽度；且使得在线调宽更加安全可靠，且响应快速、精确。

Figure 200910205066

A method for online width adjustment of a crystallizer, comprising the following steps: a determination step, a width adjustment step, and a narrowing step. The invention can zero-adjust the crystallizer and quickly adjust it to the casting width; and makes the online width adjustment safer Reliable with fast and precise response.

Figure 200910205066

Description

On-line width adjusting method for crystallizer
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 to adjust.Traditional adjustment mode is to stop casting, manually adjusts the crystallizer width or changes 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 mobile crystallizer minor face in casting cycle and changed the technology of 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, 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, described 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 enter 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 tapering between two crystallizers towards next desired value;
The tapering between two crystallizers is kept in B3, amplitude modulation, regulates relative distance between two crystallizers towards next desired value;
The width of long limit or minor face is kept between two crystallizers in B4, cone adjusting, adjusts tapering between two crystallizers towards next desired value;
B5, judge whether to reach the final goal value, if then finish to adjust; 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 tapering between two crystallizers towards next desired value;
The tapering between two crystallizers is promptly kept in C2, amplitude modulation, regulates relative distance between two crystallizers towards next desired value;
The width of long limit or minor face is promptly kept between two crystallizers in C3, cone adjusting, adjusts tapering between two crystallizers towards next desired value;
C4, judge whether to reach the final goal value, if then finish to adjust; 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, by 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 schematic diagram for crystallizer;
Fig. 5 transfers wide step schematic diagram 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, according to desired value and actual value, outputs control signals to drive unit;
Wherein, described 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 described rapid answer valve, and described step-by-step cylinder is connected with described crystallizer.The model that described 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, described drive unit has quadruplet, and every cover is located at the place, close two ends of two described crystallizers respectively.The quadruplet drive unit works alone separately.
Wherein, also comprise process control server (L2), execute-in-place panel, man-machine interface (HMI), described programmable controller (PLC) comprises first programmable controller and second programmable controller, described first programmable controller (CP-317) is connected with server (L2), man-machine interface (HMI), execute-in-place panel, be used to finish with the process control data in server and exchange, and the creation data of setting by man-machine interface, and with the communication of execute-in-place panel and show field data in real time on the guidance panel at the scene.Described 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 in real time dynamically 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, described first programmable controller (CP-317) is connected by 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 by Ethernet, also can by 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 by CP-215, uses for control.
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 by the absolute value encoder circuit, constantly compare with the transient target value of calculating gained by above-mentioned formula, rapid answer valve (QSV) is rapidly opened and closed according to this comparative result, adjust the 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 enters step 2), if narrow, then change step 3) for transferring;
2) translation promptly moves horizontally crystallizer;
3) width on minor face between two crystallizers or long limit is promptly kept in cone adjusting, adjusts tapering between two crystallizers towards the final goal value;
4) tapering between two crystallizers is promptly kept in amplitude modulation, regulates relative distance between two crystallizers towards the final goal value;
5) width of long limit or minor face is promptly kept between two crystallizers in cone adjusting, adjusts tapering between two crystallizers towards the final goal value;
6) when actual value is equal with the final goal value, finish to adjust, otherwise change step 1).
Wherein, the final goal value is that crystallizer is transferred wide target setting value, can set by 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, described phase targets value is between actual value and desired value; By the phase targets value of setting, feasible adjustment to crystallizer can be divided into a plurality of steps and finish.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 enter 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 tapering between two crystallizers towards next desired value;
The tapering between two crystallizers is promptly kept in B3, amplitude modulation, regulates relative distance between two crystallizers towards next desired value;
The width of long limit or minor face is promptly kept between two crystallizers in B4, cone adjusting, adjusts tapering between two crystallizers towards next desired value;
B5, judge whether to reach the final goal value, if then finish to adjust; 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 tapering between two crystallizers towards next desired value;
The tapering between two crystallizers is promptly kept in C2, amplitude modulation, regulates relative distance between two crystallizers towards next desired value;
The width of long limit or minor face is promptly kept between two crystallizers in C3, cone adjusting, adjusts tapering between two crystallizers towards next desired value;
C4, judge whether to reach the final goal value, if then finish to adjust; 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 by 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 determine 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 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: adjust 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 determining 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 by above-mentioned formula, rapid answer valve (QSV) is rapidly opened and closed according to this comparative result, adjust the step-by-step cylinder translational speed, advance the cylinder position value up to upper and lower stepping and all arrive the phase targets value, cone adjusting finishes, enter 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、一种结晶器在线调宽方法，其特征在于包括以下步骤：1. A crystallizer online width adjustment method is characterized in that it comprises the following steps: A判定步骤A Judgment step A1、根据两结晶器当前的实际值和最终目标值，并根据实际值和最终目标值设定一个或多个阶段目标值，所述阶段目标值介于实际值和目标值之间；A1. According to the current actual value and the final target value of the two crystallizers, and set one or more stage target values according to the actual value and the final target value, the stage target value is between the actual value and the target value; A2、设下一目标值为阶段目标值和最终目标值中朝最终目标值方向的且与当前实际值最接近的值，判定是否为调宽或调窄，如果是调宽，则进入步骤B，如果为调窄，则转步骤C；A2. Set the next target value to the value closest to the current actual value in the direction of the final target value among the stage target value and the final target value, and determine whether it is widening or narrowing. If it is widening, go to step B , if it is narrowing, go to step C; B调宽步骤B width adjustment steps B1、平移，水平移动结晶器；B1, translation, move the crystallizer horizontally; B2、调锥，维持两结晶器之间短边或长边的宽度，朝下一目标值调整两结晶器之间的锥度；B2, adjust the taper, maintain the width of the short side or long side between the two crystallizers, and adjust the taper between the two crystallizers towards the next target value; B3、调幅，维持两结晶器之间的锥度，朝下一目标值调节两结晶器之间的相对距离；B3, amplitude modulation, maintain the taper between the two crystallizers, and adjust the relative distance between the two crystallizers towards the next target value; B4、调锥，维持两结晶器之间长边或短边的宽度，朝下一目标值调整两结晶器之间的锥度；B4. Taper adjustment, maintain the width of the long side or short side between the two crystallizers, and adjust the taper between the two crystallizers towards the next target value; B5、判断是否达到最终目标值，如果是，则结束调整；否则，设下一目标值为阶段目标值和最终目标值中朝最终目标值方向的且与当前实际值最接近的值，转步骤B1；B5. Judging whether the final target value is reached, if yes, then end the adjustment; otherwise, set the next target value to the value closest to the current actual value in the direction of the final target value among the stage target value and the final target value, and go to step B1; C调窄步骤C narrowing step C1、调锥，即维持两结晶器之间短边或长边的宽度，朝下一目标值调整两结晶器之间的锥度；C1. Taper adjustment, that is, to maintain the width of the short side or long side between the two crystallizers, and adjust the taper between the two crystallizers towards the next target value; C2、调幅，即维持两结晶器之间的锥度，朝下一目标值调节两结晶器之间的相对距离；C2, amplitude modulation, that is, maintain the taper between the two crystallizers, and adjust the relative distance between the two crystallizers towards the next target value; C3、调锥，即维持两结晶器之间长边或短边的宽度，朝下一目标值调整两结晶器之间的锥度；C3, taper adjustment, that is, maintain the width of the long side or short side between the two crystallizers, and adjust the taper between the two crystallizers towards the next target value; C4、判断是否达到最终目标值，如果是，则结束调整；否则，设下一目标值为阶段目标值和最终目标值中朝最终目标值方向的且与当前实际值最接近的值，转步骤C1。C4. Judging whether the final target value is reached, if yes, then end the adjustment; otherwise, set the next target value to the value closest to the current actual value in the direction of the final target value among the stage target value and the final target value, and go to step C1. 2、根据权利要求1所述的结晶器在线调宽方法，其特征在于：还包括临时目标值设定步骤，该临时目标值是在结晶器调宽过程中，在每个扫描周期内的目标值。2. The online crystallizer width adjustment method according to claim 1, characterized in that it further comprises a step of setting a temporary target value, the temporary target value being the target value in each scan cycle during the crystallizer width adjustment process value.
CN2009102050663A 2007-06-28 2007-06-28 On-line width adjusting method for crystallizer Expired - Fee Related CN101683686B (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN102240782A (en) * 2011-08-15 2011-11-16 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
CN102240783A (en) * 2011-08-15 2011-11-16 中冶南方工程技术有限公司 Online adjusting method for extensively reducing width of continuous casting mold
CN102240788A (en) * 2011-08-15 2011-11-16 中冶南方工程技术有限公司 Online width-increasing adjustment method for continuous casting crystallizer in small range
CN102240787A (en) * 2011-08-15 2011-11-16 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
CN106270436A (en) * 2016-09-20 2017-01-04 中冶连铸技术工程有限责任公司 A kind of method improving the wide precision of crystallizer tune

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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
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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CN2801335Y (en) * 2005-06-29 2006-08-02 西安重型机械研究所 Mechanical on line thermal width regulating device of crystallizer

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Publication number Priority date Publication date Assignee Title
CN102240782A (en) * 2011-08-15 2011-11-16 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
CN102240783A (en) * 2011-08-15 2011-11-16 中冶南方工程技术有限公司 Online adjusting method for extensively reducing width of continuous casting mold
CN102240788A (en) * 2011-08-15 2011-11-16 中冶南方工程技术有限公司 Online width-increasing adjustment method for continuous casting crystallizer in small range
CN102240787A (en) * 2011-08-15 2011-11-16 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
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
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
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
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
CN106270436A (en) * 2016-09-20 2017-01-04 中冶连铸技术工程有限责任公司 A kind of method improving the wide precision of crystallizer tune
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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