CN203565818U - Automatic control system for molten steel liquid level in metallurgy continuous casting machine crystallizer - Google Patents
Automatic control system for molten steel liquid level in metallurgy continuous casting machine crystallizer Download PDFInfo
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- CN203565818U CN203565818U CN201320629212.7U CN201320629212U CN203565818U CN 203565818 U CN203565818 U CN 203565818U CN 201320629212 U CN201320629212 U CN 201320629212U CN 203565818 U CN203565818 U CN 203565818U
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Abstract
The utility model discloses an automatic control system for a molten steel liquid level in a metallurgy continuous casting machine crystallizer. The automatic control system comprises an industrial control computer, a manual/automatic liquid level operation conversion system and a tension leveler control system all of which are connected with a PLC system and further comprises a liquid level meter and liquid level signal conversion system and an electric digital cylinder drive system both of which are connected with the PLC system, a gamma ray receiver receives a signal sent by a gamma radioactive source and outputs the signal to the liquid level meter and liquid level signal conversion system, and an electric digital cylinder provides an order pulse signal for the electric digital cylinder drive system. The automatic control system can control the injection flow of a stopper rod mechanism, the height fluctuation of the liquid level of the molten steel injected into crystallizer is controlled in the range of +/- 3mm, the bonding of a water gap is reduced, the quality of a casting blank is improved, the production accidents caused by molten steel leakage and the overflow molten steel can be reduced or avoided, the labor intensity of a cast steel worker is greatly reduced, and the risks brought by the unskillful cast steel worker are greatly reduced.
Description
Technical field
The utility model relates to a kind of automatic control system for liquid level, relates in particular to steel Liquid Level Auto-Controll System in a kind of metallurgy conticaster crystallizer.
Background technology
The conticaster system of domestic iron and steel metallurgy enterprise; generally be designed to a machine multiple-strand caster; as more in 2,4,6 or 8 stream caster machines; every stream monomer continuous casting system in production process all needs outfit to water steel work; carry out the liquid steel level height in manual crystallization control device and add covering slag carrying out the lubricated work of cast base; its labour intensity is large, working environment is more severe; control accuracy is with to water personal experience, the practical capacity of steel work in close relations, and casting blank of continuous casting machine quality, pulling rate rely on completely and water steel workman and obtain reality and ensure result.Watered steel work individual energy, experience and practical capacity differentia influence, because of misoperation, caused that the too high excessive steel accident of liquid steel level in process single current or multiple-strand caster strand drawing crack bleed-out and crystallizer happens occasionally.In addition; water steel work in the every stream strand of operation conticaster casting process; it is commonplace that molten steel injects the phenomenon that in crystallizer, bonding steel leakage occurs, and cause the main cause of its generation, is that molten steel liquid fluctuating in crystallizer is large and unstable, crystallizer is not lubricated or covering slag is even not.
Along with the product line of the many kinds of the domestic high-carbon steel demand in building materials market increases, iron and steel metallurgy enterprise expands rapidly its product production capacity, and discussion agenda has been put in the application of the liquid steel level automatic control technology system in metallurgy conticaster crystallizer.
Utility model content
The utility model object is to provide a kind of can effectively improve the quality of products, reduce steel Liquid Level Auto-Controll System in the metallurgy conticaster crystallizer of personnel labor intensity.
For achieving the above object, the technical scheme that the utility model is taked is:
Steel Liquid Level Auto-Controll System in a kind of metallurgy conticaster crystallizer, comprise the manual/auto operation converting system of the industrial computer, the liquid level that are connected with PLC control system and withdrawal straightening machine control system, also comprise that the liquid level being connected with described PLC control system takes into account liquid level signal converting system and electric digital cylinder drive system, gamma-ray receiver receives the signal of gamma ray radiator transmitting, then output signal to liquid level and take into account liquid level signal converting system, electric digital cylinder provides command pulse signal to described electric digital cylinder drive system.
Described gamma ray radiator and gamma-ray receiver are symmetricly set on respectively the relative both sides of the crystallizer copper pipe outer of crystallizer.
Described electric digital cylinder is connected with the casting plug transmission mechanism of conticaster.
The interior steel Liquid Level Auto-Controll System of metallurgy conticaster crystallizer that adopts the utility model to provide, by setting up gamma ray radiator and gamma-ray receiver, PLC control system can be controlled the beam amount of plug rod mechanism, make molten steel inject fluctuation of level scope control in crystallizer within ± 3mm, for covering slag can dissolve lubricated creating favorable conditions fully, not only reduced casting billet surface slag bleed-out but also make crystallizer and the contact-making surface sufficient lubrication of strand, effectively control tundish and be injected into the molten steel flow in crystallizer, reduced the bonding at the mouth of a river, improved cc billet surface quality, improved internal soundness, make casting blank of continuous casting machine inside and Longitudinal Surface Cracks, transverse fissure, the inside and outside defect that bubble and strand are crossed the manufacture such as dark because of mold oscillation vestige is eliminated substantially, and reduce or avoided the generation of bleed-out and excessive steel production accident, greatly reduce and water the labour intensity of steel work and water not high the brought risk of steel work technical ability.
Accompanying drawing explanation
Fig. 1 is the structural representation of automatic control system of the present utility model.
Fig. 2 is overall structure schematic diagram of the present utility model.
Fig. 3 is the mounting structure schematic diagram of gamma ray radiator.
In figure, 1-gamma ray radiator, 2-gamma-ray receiver, 3-liquid level is taken into account liquid level signal converting system, 4-PLC control system, 5-electric digital cylinder, 6-electric digital cylinder drive system, 7-continuous casting machine tension leveling machine control system, 8-industrial computer, the manual/auto operation converting system of 9-liquid level, 10-withdrawal straightening machine, 11-penetrates source capsule conduit is installed, 12-crystallizer, 13-Zhu Sai executing agency, 14-stopper, 15-crystallizer copper pipe, 16-casting plug transmission mechanism.
The specific embodiment
Below in conjunction with specific embodiment and accompanying drawing thereof, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
As shown in Figure 1, steel Liquid Level Auto-Controll System in the metallurgy conticaster crystallizer that the utility model provides, comprise the industrial computer 8 being connected with PLC control system 4, the manual/auto operation converting system 9 of liquid level and withdrawal straightening machine control system 7, also comprise that the liquid level being connected with PLC control system 4 takes into account liquid level signal converting system 3 and electric digital cylinder drive system 6, gamma-ray receiver 2 receives the signal of gamma ray radiator 1 transmitting, then output signal to liquid level and take into account liquid level signal converting system 3, electric digital cylinder 5 provides command pulse signal to electric digital cylinder drive system 6.Gamma ray radiator 1 and gamma-ray receiver 2 be the symmetrical relative both sides that are arranged on crystallizer copper pipe 15 outers of crystallizer 12 respectively.Electric digital cylinder 5 is connected with the casting plug transmission mechanism 16 of conticaster.
As shown in Figures 2 and 3, gamma ray radiator 1 and gamma-ray receiver 2 be the symmetrical relative both sides that are arranged on crystallizer copper pipe of continuous casting machine 15 outers respectively, gamma ray radiator 1 sends ray, radiation levels is through crystallizer copper pipe 15, gamma-ray receiver 2 receives signal, then to liquid level, takes into account liquid level signal converting system 3 current signal is provided.Gamma ray radiator 1 is isotope Ce 137, and the energy of γ ray that Ce 137 radiates only has 0.661 Mev, and roentgen dose X is little, safer, 20 years half-life, long service life.Gamma ray radiator 1 is arranged on to be penetrated in source capsule installation conduit 11, it is interval that gamma ray radiator 1 is vertically mounted on above-below direction 3 mm, penetrate the inner arc place that source capsule is arranged on crystallizer mechanism inside, during upper dummy bar, can by penetrating source capsule, from penetrating source capsule, taking-up conduit 11 be installed fast, do not affect the operation in crystallizer copper pipe, install simply, easy to maintenance, safety and stability.The receiving transducer of gamma-ray receiver 2 adopts high sensor, mainly uses BGO crystal as the receiver crystal of popping one's head in, and is radiated at gamma intensity triggering and conducting 0～20mA magnitude of current of BGO crystal.Gamma intensity is directly proportional to BGO crystal On current, and gamma intensity, through molten steel in mold, is inversely proportional to the liquid level of molten steel.By the molten steel liquid level height in sensor continuous measurement crystallizer, the variable signal of BGO crystal On current is sent into liquid level and take into account liquid level signal converting system 3.
It is the secondary meter devices that integrate that liquid level is taken into account liquid level signal conversion equipment 3, installs concentratedly in conticaster master-control room operating desk cabinet, by computer system network, data message and PLC control system 4 is exchanged.Liquid level is taken into account liquid level signal conversion equipment 3 by the BGO crystal On current 0～20mA of the gamma-ray receiver receiving 2, is defeated by liquid level and takes into account liquid level signal converting system 3 after changing, and carries out the processing of intelligent digital signal.Liquid level is taken into account 0～20mA current signal of liquid level signal converting system 3 reception gamma-ray receiver 2 outputs after the amplification board of liquid level meter amplifies, by installing inner single chip microcomputer, be converted to position digital signal 0～± 3mm, the decoding program of the preset establishment of single chip microcomputer, current signal is converted to digital quantity, obtain the measurement of the molten steel liquid level height in crystallizer 12, by network, send into the PLC control system 4 of conticaster.PLC control system 4, by process modeling, is set up corresponding performing a programme, and the command pulse signal of PLC control system 4 outputs, to electric digital cylinder drive system 6, drives, controls the stroke up and down of electric digital cylinder 5.
Electric digital cylinder 5 is connected with casting plug transmission mechanism 16, drive stopper 14, regulate the mouth of a river aperture of the stopper 14 in stopper execution mechanism 13, dynamic process guarantees that molten steel injects the flow in crystallizer 12, make remain on≤± 3mm of the interior liquid steel level height of crystallizer 12, thereby control the beam amount of molten steel, realize the interior liquid steel level height of conticaster crystallizer 12 and keep stable.
In addition, PLC control system 4 is also sent analog voltage signal to withdrawal straightening machine control system 7, drives the rotating speed of withdrawal straightening machine 10, for the auxiliary cast base speed of controlling.If can not make the remain on≤± 3mm of liquid steel level height in crystallizer in 10 seconds, send in time the given analog quantity of withdrawal straightening machine to frequency converter, regulate the output frequency of frequency converter, change the rotating speed of withdrawal straightening machine 10, control cast base speed, the liquid steel level finally reaching in crystallizer keeps stable.PLC control system 4 is carried out data communication with the industrial computer that molten steel in mold liquid level automatic monitoring, setting technological parameter are set up, and realizes the real-time level height monitoring of molten steel; Also can set continuous casting machine tension leveling machine casting speed etc. at this.
The manual/auto operation converting system 9 of liquid level be the manual casting machine of liquid level open water/casting machine open water finish after conversion automatic liquid level control operation converting system, can realize conticaster conversion manually with the translation function of automatic liquid steel level control system.Before conticaster is produced casting, first will send dummy bar to send into crystallizer 12 bottoms, open manually the mouth of a river of the stopper 14 in stopper execution mechanism 13, molten steel injects the interior liquid level of crystallizer 12 and rises, when liquid level rises on crystallizer 12 along 200mm, start withdrawal straightening machine 10, start cast base, this process is " casting machine is opened and watered ".It is " casting machine is opened and watered end " above afterwards that withdrawal straightening machine 10 is pulled out 1.5 meters, crystallizer by dummy bar by strand.Set up the manual/auto operation converting system 9 of liquid level, object is that casting machine is opened and watered the course of work and must carry out the manual/auto operation converting system of liquid level " manually " mode of operation and complete, after casting machine open casting operation finishes, the manual/auto operation converting system of liquid level is transformed into " automatically " operation element pattern, and in conticaster crystallizer, steel Liquid Level Auto-Controll System starts execution work.
Electric digital cylinder 5 is connected with casting plug transmission mechanism 16, digital servomotor and push rod, consists of, and the number of digital pulse signal is controlled servomotor and promoted push rod and do straight-line displacement, thus with the lifting of dynamic load or move horizontally.Do not need hydraulic oil pipe, high temperature resistance, anti-vibration.
Above-described is only the preferred embodiments of invention utility model, does not limit to the utility model.Should be understood that for the person of ordinary skill of the art; under the enlightenments such as technology provided by the utility model, function; can also make other equivalent modifications and improvement, all can realize the purpose of this utility model, all should be considered as protection domain of the present utility model.
Claims (3)
1. steel Liquid Level Auto-Controll System in a metallurgy conticaster crystallizer, comprise the industrial computer (8) being connected with PLC control system (4), the manual/auto operation converting system of liquid level (9) and withdrawal straightening machine control system (7), it is characterized in that, also comprise that the liquid level being connected with described PLC control system (4) takes into account liquid level signal converting system (3) and electric digital cylinder drive system (6), gamma-ray receiver (2) receives the signal of gamma ray radiator (1) transmitting, then output signal to liquid level and take into account liquid level signal converting system (3), electric digital cylinder (5) provides command pulse signal to described electric digital cylinder drive system (6).
2. steel Liquid Level Auto-Controll System in metallurgy conticaster crystallizer according to claim 1, it is characterized in that, described gamma ray radiator (1) and gamma-ray receiver (2) are symmetricly set on respectively the relative both sides of crystallizer copper pipe (15) outer of crystallizer (12).
3. steel Liquid Level Auto-Controll System in metallurgy conticaster crystallizer according to claim 1, is characterized in that, described electric digital cylinder (5) is connected with the casting plug transmission mechanism (16) of conticaster.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320629212.7U CN203565818U (en) | 2013-10-12 | 2013-10-12 | Automatic control system for molten steel liquid level in metallurgy continuous casting machine crystallizer |
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| CN201320629212.7U CN203565818U (en) | 2013-10-12 | 2013-10-12 | Automatic control system for molten steel liquid level in metallurgy continuous casting machine crystallizer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550807A (en) * | 2014-12-24 | 2015-04-29 | 江苏永钢集团有限公司 | Automatic casting method of sizing nozzle of continuous casting machine |
| CN105821469A (en) * | 2016-05-16 | 2016-08-03 | 西安创联新能源设备有限公司 | Single crystal furnace silicon solution liquid level position detection method and device and adjusting system |
| CN107728656A (en) * | 2017-09-29 | 2018-02-23 | 四川德胜集团钒钛有限公司 | A kind of Mold Level Control System For Continuous Caster and control method |
| CN114905021A (en) * | 2022-05-30 | 2022-08-16 | 首钢京唐钢铁联合有限责任公司 | Method for detecting liquid level of molten steel in crystallizer of continuous casting machine |
| CN115415490A (en) * | 2022-08-17 | 2022-12-02 | 宁波钢铁有限公司 | Steelmaking continuous casting control system and method |
-
2013
- 2013-10-12 CN CN201320629212.7U patent/CN203565818U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550807A (en) * | 2014-12-24 | 2015-04-29 | 江苏永钢集团有限公司 | Automatic casting method of sizing nozzle of continuous casting machine |
| CN104550807B (en) * | 2014-12-24 | 2016-08-24 | 江苏永钢集团有限公司 | Conticaster metering nozzle automatic casting method |
| CN105821469A (en) * | 2016-05-16 | 2016-08-03 | 西安创联新能源设备有限公司 | Single crystal furnace silicon solution liquid level position detection method and device and adjusting system |
| CN107728656A (en) * | 2017-09-29 | 2018-02-23 | 四川德胜集团钒钛有限公司 | A kind of Mold Level Control System For Continuous Caster and control method |
| CN114905021A (en) * | 2022-05-30 | 2022-08-16 | 首钢京唐钢铁联合有限责任公司 | Method for detecting liquid level of molten steel in crystallizer of continuous casting machine |
| CN114905021B (en) * | 2022-05-30 | 2024-06-07 | 首钢京唐钢铁联合有限责任公司 | Method for detecting molten steel level of crystallizer of continuous casting machine |
| CN115415490A (en) * | 2022-08-17 | 2022-12-02 | 宁波钢铁有限公司 | Steelmaking continuous casting control system and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20141012 |
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| EXPY | Termination of patent right or utility model |