CN107728656A - A kind of Mold Level Control System For Continuous Caster and control method - Google Patents
A kind of Mold Level Control System For Continuous Caster and control method Download PDFInfo
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- CN107728656A CN107728656A CN201710905925.4A CN201710905925A CN107728656A CN 107728656 A CN107728656 A CN 107728656A CN 201710905925 A CN201710905925 A CN 201710905925A CN 107728656 A CN107728656 A CN 107728656A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- Engineering & Computer Science (AREA)
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Abstract
The present invention discloses a kind of Mold Level Control System For Continuous Caster, and the control system includes：Host computer, liquid level acquisition module, hot saw PLC and control execution module；Wherein, at least one image acquisition units are provided with the liquid level acquisition module, the liquid level acquisition module, host computer and hot saw PLC are sequentially connected by Ethernet, shared data；The hot saw PLC is connected with each other with control execution module by DP wires.The application provides a kind of Mold Level Control System For Continuous Caster, and the system is applied in billet caster, the liquid level of small square billet continuous caster mould is kept in the reasonable scope, to improve the quality of steel billet.
Description
Technical field
The present invention relates to continuous casting project technical field, and in particular to a kind of Mold Level Control System For Continuous Caster and control
Method.
Background technology
In modern continuous casting, with the horizontal raising of factory automation, the requirement to reliability and slab quality
It is increasingly stricter, requirement to crystallizer liquid level control system precision also more and more higher.Mould liquid level is non-in metallurgical continuous casting system
One of often important link, the fluctuation of liquid level can cause crystallizer protecting residue and impurity to be largely involved in molten steel, have a strong impact on strand
Quality, in some instances it may even be possible to cause freeing for excessive steel and the bleed-out accident in casting cycle, it is therefore necessary to by crystallizer liquid level control system
In a suitable scope.
At present, mould liquid level automatically controls the slab for being successfully applied in that strand section is 150mm × more than 150mm
On conticaster, and the application effect on billet caster (strand section is 130mm × 130mm) is bad.Although Shoudu Iron and Steel Co is
Domestically leading continuous casting large enterprises, but small billet casting machine is also all to open to pour manually, manual control mold liquid level height, automatic control
Technology processed lags far behind developed country, and billet quality hardly results in improvement.
The content of the invention
In view of this, the application provides a kind of Mold Level Control System For Continuous Caster, and the system is applied into small side
In billet continuous casting machine, the liquid level of small square billet continuous caster mould is set to keep in the reasonable scope, to improve the quality of steel billet.
To solve above technical problem, technical scheme provided by the invention is a kind of conticaster crystallizer Liquid level system
System, the control system include：Host computer, liquid level acquisition module, hot saw PLC and control execution module；Wherein, the liquid level is adopted
At least one image acquisition units are provided with collection module, the liquid level acquisition module, host computer and hot saw PLC pass through Ethernet
It is sequentially connected, shared data；The hot saw PLC is connected with each other with control execution module by DP wires.
Preferably, described image collecting unit is to utilize the brightness variable gradient between crystallizer liquid steel level image pixel
To realize the detection to the real-time height of crystallizer liquid steel level.
Preferably, the hot saw PLC includes power distribution cabinet and CPU module, and the power distribution cabinet quantity is multiple, each power distribution cabinet
Inside it is both provided with PLC and power module.
Preferably, the cascade system that the control execution module passes through DP bus transfers with the multiple PLC.
Preferably, the control execution module includes stopper control unit, straightening control unit and flow controlling unit.
A kind of method for carrying out intelligent control to small square billet continuous caster mould liquid level using above-mentioned control system, including with
Lower step：
1) gathered data is sent to host computer, host computer record gathered data and simultaneously sends a signal to heat by liquid level acquisition module
Saw PLC is managed everywhere；
2) hot saw PLC carries out processing computing to gathered data according to the master pattern to prestore, and by acquired results transmit to
Execution module executive control operation is controlled, so as to reach the purpose of intelligent control mould liquid level.
Preferably, comprised the following steps that in the step 2)：Hot saw PLC enters according to the master pattern to prestore to gathered data
Row processing computing, and acquired results simultaneous transmission to stopper control unit, straightening control unit and flow controlling unit are carried out
Control operation, so as to reach the purpose of intelligent control；Wherein, the stopper control unit is the stopper speed for controlling conticaster
Degree, the straightening control unit are to control the casting speed of conticaster, and the flow controlling unit is to control to enter crystallization
The flow velocity of the molten steel of device.
Accurate crystallizer liquid level control system is considered as to improve the key of continuous casting billet quality.In continuous casting production process, for
One basic demand of crystallizer liquid level control system is steady production operation, avoids bleedout and excessive steel.Its is secondary to keep as far as possible
Level stability, improves the quality of strand, and can meet this requirement be a kind of current important mark for weighing continuous casting controlled level
Will.The application provides a kind of Mold Level Control System For Continuous Caster, and by the control system billet caster, with
Improve the quality of steel billet.Wherein, the control system includes：Host computer, liquid level acquisition module, hot saw PLC and control perform mould
Block；Wherein, at least one image acquisition units, the liquid level acquisition module, host computer are provided with the liquid level acquisition module
And hot saw PLC is sequentially connected by Ethernet, shared data；The hot saw PLC and control execution module are mutual by DP wires
Connection.Liquid level acquisition module is used for the information for gathering liquid level in crystallizer, and gathered information is sent by Ethernet
Integrated to host computer.Wherein, image acquisition units are provided with liquid level acquisition module, it is to utilize crystallizer liquid steel level
Brightness variable gradient between image pixel realizes the detection to the real-time height of crystallizer liquid steel level.Host computer, which receives, to be come
From after the information of liquid level acquisition module, it is integrated to the data obtained, and passes through Ethernet transmission signal to hot saw PLC.
Wherein, hot saw PLC includes power distribution cabinet and CPU module, and the power distribution cabinet quantity is multiple, is set in each power distribution cabinet
It is equipped with PLC and power module.After hot saw PLC receives the data from host computer, its internal CPU is by according to the mark to prestore
Quasi-mode type carries out processing computing to gathered data, and is made whether the judgement adjusted to liquid level in crystallizer, if need to make
Adjustment signal is then sent to the PLC in hot saw PLC, PLC and transmits gained adjustment operation result to control and perform by adjustment, CPU
Module is adjusted operation, wherein, the cascade system that the control execution module passes through DP bus transfers with the multiple PLC；
The control execution module includes stopper control unit, straightening control unit and flow controlling unit, and stopper control unit is
Stopper speed is controlled to control molten steel flow, to reach the purpose of level stability.Straightening control unit is used to control casting speed
To keep liquid level stabilizing.The method is the molten steel amount that fixed tundish is flowed into crystallizer, changes amendment throwing according to liquid level
Speed, so that mould liquid level keeps constant.Liquid level is controlled by changing pulling rate, its control characteristic curve is linear.Cause
This, its control accuracy is very high in theory.Flow controlling unit is to control the molten steel flow into crystallizer, to protect
Level stability is held, that is, the opening degree of slide gate nozzle is controlled to control molten steel flow, to reach the purpose of level stability.By above-mentioned three
Kind control method integrated use is in the control of mould liquid level, so that liquid level keeps stable in crystallizer.
The positive achievement that the present invention obtains is：
The present invention proposes a kind of Mold Level Control System For Continuous Caster, and it by detecting the height of the liquid level in crystallizer in real time
Degree, and the data obtained is sent in hot saw PLC in real time by host computer and is handled and is regulated and controled, hot saw PLC regulates and controls gained
Data are sent performs control into the control execution module including stopper control unit, straightening control unit and flow controlling unit
Operation, to ensure that liquid level keeps maintenance level in crystallizer.Wherein, the application is also by above-mentioned conticaster crystallizer Liquid level system
System is applied in billet caster.
Brief description of the drawings
Fig. 1 is a kind of Mold Level Control System For Continuous Caster flow chart of the present invention
Embodiment
In order that those skilled in the art more fully understands technical scheme, with reference to specific embodiment pair
The present invention is described in further detail.
The abbreviation of continuous casting steel machine during continuous casting, it is to make molten steel constantly by water mold, congeals into after duricrust from crystallizer
Lower exit port is pulled straight, and through water-spraying control, the casting technique of blank is cut into after whole solidifications.The qualified steel produced by converter
Water, casting position is transported to through ladle, is cast into by tundish in Forced water cooling crystallizer.The molten steel of crystallizer is cast into rapid
While cooled and solidified forms strand, its front portion is coagulated together with stretching into the dummy bar head of crystalliser feet.Work as crystallizer
After interior molten steel is raised to the height of requirement, Blank drawing machine is started, dummy bar is pulled out from crystallizer with certain speed.Strand is drawn out
Afterwards, by secondary cooling region, make its faster cooling and continue gradually solidification.Then it is complete after straightener is aligned
The straight strand solidified entirely is cut into scale by cutting equipment, enters next procedure through conveyor roller.
Equipment used in continuous casting, is actually included in a whole set of mechanical electric on continuous casting work line and control is set
It is standby.Its capital equipment includes ladle and its Transporting equipment, tundish, crystallizer and its vibrating device, secondary cooling apparatus, throwing
Straightener, strand cutter device, strand conveying arrangement and each several part are electrically and automatic control device etc..
The continuous casting that converter is produced loads ladle with qualified molten steel, after external refining equipment is handled, is transported by ladle
Equipment is transported to conticaster casting position, supplies molten steel necessary to tundish.At present, what is used in production mainly has four kinds of types
The equipment of formula：Special purpose crane, fixed mounting, casting car and turntable.
Tundish is an intermediate receptacle between ladle and crystallizer.Molten steel in ladle first injects tundish, Ran Houzai
It is cast into by the spout device in tundish in crystallizer.Tundish played in casting process decompression, current stabilization, slagging-off, Chu Gang,
The important function such as shunting and tundish metallurgy.
Crystallizer is the very important part of conticaster, is continuous casting installation for casting " heart ".Molten steel cools down in crystallizer, just
Step is frozen into the strand profile of certain shell thickness, and by continuously mouth pulls out under crystallizer, into two cold-zones.Crystallizer is pressed
It is divided into two kinds of arc and straight according to its inner wall shape；Divide by casting blank specification and shape, have round billet, rectangular bloom, square billet, slab and
Beam blank mould；By its structure type, monoblock type, bushing type and combined type etc. can be divided into.Crystallizer liquid level control system it is important
Property be to be reduced or avoided bleed-out, overflow steel, steady production operation；Prevent from floating over the impurity on mold liquid level and be involved in strand, keep away
Exempt from casting billet surface and internal produce adds slag defect；The uneven inflow of crystallizer protecting residue is prevented, avoids cracking, clinker streak
Etc. surface defect；Make strand initial solidification stable, ensure to produce uniform solidified shell in crystallizer；Improve the work of operating personnel
Make environment, reduce labor intensity；Optimize production process and the production schedule, reduce production cost.Particularly high efficiency continuous casting when, pulling rate
It is higher, if controlling casting cycle without using mould liquid level Detection ＆ Controling device, it cannot ensure that conticaster normally produces.
Secondary cooling apparatus directly receives high temperature shell (10n shouts~15mm) strand from crystallizer, but inside is still
Liquid molten steel.The purpose for setting it is direct water-spraying control can be used to carry the strand of wick-containing, make it be rapidly cooled to coagulate completely
Gu strand is avoided to produce bulge deformation.The nip rolls of two device for cooling then plays a part of supporting and being oriented to strand and dummy bar, prevents
Its sideslip.
The drawing straightener is located at secondary cooling zone afterbody, plays a part of to strand pull-out, aligning and deingot bar.Even
In casting, because casting steel grade is different, it is desirable to casting speed it is different, the pulling rate of the drawing straightener is also different.
Strand is cut into scale or multiple length by cutter device according to user or the difference of next procedure.Because strand is pulling out
During constantly move, it is desirable to cutter device will realize strict be synchronized with the movement in cutting process with strand.Conticaster
The cutting method of use has two kinds of gas flame cuttiug and machine cuts.
The task of strand conveying arrangement is being cut into the slab cooling of scale, finishing, ejection, to ensure the continuous casting of conticaster
Production.
The technical scheme that the application provides is a kind of Mold Level Control System For Continuous Caster, and the control system includes：
Host computer, liquid level acquisition module, hot saw PLC and control execution module；Wherein, it is provided with least one in the liquid level acquisition module
Individual image acquisition units, the liquid level acquisition module, host computer and hot saw PLC are sequentially connected by Ethernet, shared data；Institute
Hot saw PLC is stated to be connected with each other by DP wires with control execution module.Wherein, described image collecting unit is to utilize crystallizer steel
Brightness variable gradient between water level image pixel realizes the detection to the real-time height of crystallizer liquid steel level；The heat
Saw PLC includes power distribution cabinet and CPU module, and the power distribution cabinet quantity is multiple, and PLC and power supply mould are both provided with each power distribution cabinet
Block；The cascade system that described control unit passes through DP bus transfers with the multiple PLC；The control execution module includes stopper
Control unit, straightening control unit and flow controlling unit.
A kind of method for carrying out intelligent control to small square billet continuous caster mould liquid level using above-mentioned control system, including with
Lower step：
1) gathered data is sent to host computer, host computer record gathered data and simultaneously sends a signal to heat by liquid level acquisition module
Saw PLC is managed everywhere；
2) hot saw PLC carries out processing computing to gathered data according to the master pattern to prestore, and acquired results are passed simultaneously
Transport to stopper control unit, straightening control unit and flow controlling unit and be controlled operation, so as to reach the mesh of intelligent control
's；Wherein, the stopper control unit is the stopper speed for controlling conticaster, and the straightening control unit is to control continuous casting
The casting speed of machine, the flow controlling unit are to control the flow velocity into the molten steel of crystallizer.
Itd is proposed in the application in the Mold Level Control System For Continuous Caster, including host computer, liquid level acquisition module, heat
Saw PLC and control execution module；Wherein, liquid level acquisition module is used for the information for gathering liquid level in crystallizer, and will be adopted
Collection information is sent to host computer by Ethernet to be integrated.Wherein, image acquisition units are provided with liquid level acquisition module, its
It is to realize the real-time height to crystallizer liquid steel level using the brightness variable gradient between crystallizer liquid steel level image pixel
The detection of degree.After host computer receives the information from liquid level acquisition module, it is integrated to the data obtained, and passes through Ethernet
Transmission signal is to hot saw PLC.Wherein, hot saw PLC includes power distribution cabinet and CPU module, and the power distribution cabinet quantity is multiple, Mei Gepei
PLC and power module are both provided with electric cabinet.After hot saw PLC receives the data from host computer, its internal CPU is by root
Processing computing is carried out to gathered data according to the master pattern to prestore, and is made whether to sentence liquid level adjustment in crystallizer
Disconnected, if need to adjust, adjustment signal is then sent to the PLC in hot saw PLC, PLC and transmits gained adjustment operation result by CPU
Operation is adjusted to control execution module, wherein, the control execution module passes through DP bus transfers with the multiple PLC
Cascade system；The control execution module includes stopper control unit, straightening control unit and flow controlling unit, stopper control
Unit is to control stopper speed to control molten steel flow, to reach the purpose of level stability.Straightening control unit is used to control
Casting speed is to keep liquid level stabilizing.The method is the molten steel amount that fixed tundish is flowed into crystallizer, is changed according to liquid level
Casting speed is corrected, so that mould liquid level keeps constant.Liquid level is controlled by changing pulling rate, its control characteristic curve is line
Property.Therefore, its control accuracy is very high in theory.Flow controlling unit is to control the steel flow into crystallizer
Amount, to keep level stability, that is, the opening degree of slide gate nozzle is controlled to control molten steel flow, to reach the purpose of level stability.
By above-mentioned three kinds of control method integrated uses in the control of mould liquid level, so that liquid level keeps stable in crystallizer.
The method that above-mentioned control system carries out intelligent control to small square billet continuous caster mould liquid level, its specific steps is such as
Under：
1) image acquisition units in liquid level acquisition module are detected in real time to liquid level in crystallizer, and will detection
Data are sent to host computer in real time, and data are integrated by host computer and send a signal to hot saw PLC and are managed everywhere；
2) hot saw PLC carries out processing computing according to the master pattern to prestore to gathered data, is made whether to need to crystallization
The judgement that liquid level adjusts in device, if need to adjust, gained adjustment result is transmitted to control execution module and held
Row control operation, so as to reach the purpose of liquid level in intelligent control crystallizer；Wherein, the control execution module includes plug
Rod control unit, straightening control unit and flow controlling unit, the stopper control unit are the plug for controlling conticaster
Rod speed, the straightening control unit are to control the casting speed of conticaster, and the flow controlling unit is to control to enter
The flow velocity of the molten steel of crystallizer.
So far, an auto-adjustment control operation is completed.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of Mold Level Control System For Continuous Caster, it is characterised in that the control system includes：Host computer, liquid level are adopted
Collect module, hot saw PLC and control execution module；Wherein, at least one IMAQ list is provided with the liquid level acquisition module
Member, the liquid level acquisition module, host computer and hot saw PLC are sequentially connected by Ethernet, shared data；The hot saw PLC with
Control execution module is connected with each other by DP wires.
2. a kind of Mold Level Control System For Continuous Caster according to claim 1, it is characterised in that described image gathers
Unit is to realize the reality to crystallizer liquid steel level using the brightness variable gradient between crystallizer liquid steel level image pixel
Shi Gaodu detection.
A kind of 3. Mold Level Control System For Continuous Caster according to claim 1, it is characterised in that the hot saw PLC
Including power distribution cabinet and CPU module, the power distribution cabinet quantity is multiple, and PLC and power module are both provided with each power distribution cabinet.
A kind of 4. Mold Level Control System For Continuous Caster according to claim 1 or 3, it is characterised in that the control
The cascade system that unit passes through DP bus transfers with the multiple PLC.
5. a kind of Mold Level Control System For Continuous Caster according to claim 1, it is characterised in that the control performs
Module includes stopper control unit, straightening control unit and flow controlling unit.
6. one kind is carried out using control system any one of claim 1,2,3,5 to small square billet continuous caster mould liquid level
The method of intelligent control, comprises the following steps：
1) gathered data is sent to host computer, host computer record gathered data and simultaneously sends a signal to hot saw by liquid level acquisition module
PLC is managed everywhere；
2) hot saw PLC carries out processing computing to gathered data according to the master pattern to prestore, and acquired results are transmitted to control
Execution module executive control operation, so as to reach the purpose of intelligent control mould liquid level.
7. the method that the control system according to claim 6 carries out intelligent control to small square billet continuous caster mould liquid level,
Characterized in that, comprised the following steps that in the step 2)：Hot saw PLC according to the master pattern to prestore to gathered data at
Computing is managed, and acquired results simultaneous transmission to stopper control unit, straightening control unit and flow controlling unit are controlled
Operation, so as to reach the purpose of intelligent control；Wherein, the stopper control unit as controls the stopper speed of conticaster, institute
It is to control the casting speed of conticaster to state straightening control unit, and the flow controlling unit is to control the steel into crystallizer
The flow velocity of water.
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| CN201710905925.4A CN107728656A (en) | 2017-09-29 | 2017-09-29 | A kind of Mold Level Control System For Continuous Caster and control method |
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| CN201710905925.4A CN107728656A (en) | 2017-09-29 | 2017-09-29 | A kind of Mold Level Control System For Continuous Caster and control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109164840A (en) * | 2018-04-25 | 2019-01-08 | 西安麦特沃金液控技术有限公司 | A kind of tank level control system and method |
| CN111097886A (en) * | 2019-12-13 | 2020-05-05 | 河钢乐亭钢铁有限公司 | Steady-state casting process method for inhibiting liquid level fluctuation of continuous casting crystallizer |
| CN113134588A (en) * | 2021-04-20 | 2021-07-20 | 张家港宏昌钢板有限公司 | Quick-change system for full-protection tundish of continuous casting billet and using method thereof |
| CN114799106A (en) * | 2022-06-01 | 2022-07-29 | 娄底职业技术学院 | Continuous casting machine based on liquid level control of continuous casting crystallizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113134588A (en) * | 2021-04-20 | 2021-07-20 | 张家港宏昌钢板有限公司 | Quick-change system for full-protection tundish of continuous casting billet and using method thereof |
| CN114799106A (en) * | 2022-06-01 | 2022-07-29 | 娄底职业技术学院 | Continuous casting machine based on liquid level control of continuous casting crystallizer |
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