EP0192043B1 - Vorrichtung zur Füllstandsmessung in Behältern, insbesondere Stranggiesskokillen - Google Patents

Vorrichtung zur Füllstandsmessung in Behältern, insbesondere Stranggiesskokillen Download PDF

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Publication number
EP0192043B1
EP0192043B1 EP86100498A EP86100498A EP0192043B1 EP 0192043 B1 EP0192043 B1 EP 0192043B1 EP 86100498 A EP86100498 A EP 86100498A EP 86100498 A EP86100498 A EP 86100498A EP 0192043 B1 EP0192043 B1 EP 0192043B1
Authority
EP
European Patent Office
Prior art keywords
coils
coil
primary coil
measurement
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86100498A
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English (en)
French (fr)
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EP0192043A1 (de
Inventor
Jean Liesch
Jo Simon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arcelor Luxembourg SA
Original Assignee
Arbed SA
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Filing date
Publication date
Application filed by Arbed SA filed Critical Arbed SA
Priority to AT86100498T priority Critical patent/ATE41617T1/de
Publication of EP0192043A1 publication Critical patent/EP0192043A1/de
Application granted granted Critical
Publication of EP0192043B1 publication Critical patent/EP0192043B1/de
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/186—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using electric, magnetic, sonic or ultrasonic means

Definitions

  • the invention relates to a device for measuring the filling level of liquid metals in receptacles, in particular continuous casting molds, which device comprises a primary coil, which creates an electromagnetic field, and two secondary measurement coils according to the preambles of the claims. 1 and 7.
  • a measuring device for determining the level of liquid metal in an ingot mold, comprising a primary coil supplied with alternating current and two secondary measurement coils connected in opposition.
  • the density of the coils of the secondary coils is increased around the usual working levels.
  • the object of the invention is to remedy the drawbacks of the measurement devices of the state of the art and to propose a device of reduced size, giving rise to signals whose interpretation is simple, having a measurement range. extended and allowing easy calibration.
  • a first secondary measurement winding S runs along the primary winding over its entire height and inside it.
  • a second secondary compensation winding S ' is arranged outside the primary winding.
  • Fig.2 shows an alternative embodiment of the device according to the invention. It is a coil of cylindrical shape, with a length of 20 to 30cm and a diameter of 20 to 30mm, which is introduced into a suitable housing, drilled in the copper plate of the mold, thick of 40 to 50 mm.
  • This sensor which must withstand fairly high temperatures, has no active component, but only winding wires which can withstand this temperature. It essentially consists of a triple coil 20 for level measurement, with a length of 10 to 15cm, and possibly a triple coil 21 for level detection and calibration of the measurement system, with a length of 2 at 5cm.
  • the measuring device 20 just like the detection and calibration device 21 comprises a primary winding P 2 resp. P 3 , a secondary measurement winding S 2 resp.
  • the two secondary windings are arranged on either side of the primary winding and this over its entire height.
  • a linear monotonic signal (V 2n , V 3n ) results as a function of the distance (height H of the metal bath).
  • the lower winding 21 allows easy detection of the steel during startup.
  • the coil S 2 can also be produced in at least two parts as explained above with reference to FIG. 1. This rod-shaped sensor of circular section is particularly compact and easily fits in one of the copper plates of the ingot mold. To increase the surface of the turns facing the bath, the stick can be given a rectangular section.
  • fig. 4 is shown a particularly advantageous embodiment of primary and secondary coils according to the invention, based on the observation that the difference in voltages between secondary coil and reference coil as a function of the height of the bath is far from having linearity required, such as fig. 1 or fig. 2 suggests.
  • the different coils are subdivided into several stages, each stage possibly containing a different number of turns. Inside a stage, the turns are arranged in one or more superimposed lots, a lot being constituted by a monolayer of adjacent turns; to simplify manufacture, a batch may possibly extend over several floors.
  • the transverse dimension does not change from one stage to another one can in the case of a reduced number of lots in certain stages, fill the remaining space with cardboard or else pour it a plastic material; you can also choose the diameter of the turns so as to fill all the space available inside a floor. This latter possibility cannot obviously be chosen when a batch of turns crosses several stages.
  • the number of batches to be assembled in a stage is determined experimentally so that the difference of the signals picked up by the coils S and S 'varies as monotonously as possible according to the height of the bath and comprises a minimum of parasitic signals .
  • the reference coil S ' contains few or no turns in the two extreme stages and an identical number of lots as the secondary coil S in the other stages.
  • the secondary coil S contains a maximum of lots (eg 9) in the extreme stages and a minimum of lots (eg 5) in the stage (s) located in the center. In the floor located at the bath level the number of lots is high (eg 7).
  • the number of batches included in the different stages of the primary coil P is usually slightly lower than that in the stages of the secondary coil S; the turns of the primary coil, on the other hand, generally have a larger diameter than that of the turns of the secondary coils.
  • Certain lower stages of the primary coil (with the exception of the stage situated at the lower end, which has a primary function when starting the casting) can be devoid of turns and then only contain a connection between the two adjacent floors.
  • at least one stage of the secondary coil S has a sample.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Continuous Casting (AREA)

Claims (8)

1. Vorrichtung zur Füllstandsmessung von flüssigen Metallen (M) in Behältern, insbesondere Stranggießkokillen (K) durch Ortung von aus dem flüssigen Metall stammenden Sekundärmagnetfeldern, begreifend eine Primärspule (P1, P2, P4), welche ein zeitlich änderndes Magnetfeld erzeugt, zwei Sekundärmeßspulen (S, S'; S2, S'2; S4, 5'4) welche sich längs der Primärspule auf praktisch deren ganzen Höhe und auf beiden Seiten von dieser erstrecken, sowie Mittel , welche die Differenz der von den Sekundärspulen empfangenen Signale liefern, dadurch gekennzeichnet, daß wenigstens eine der Spulen (P; P2; P4; S, S'; S2, S'2; S4, S'4) in wenigstens zwei übereinanderliegende Stufen (40, 41, 42, 43, 44), mit verschiedenen magnetischen Eigenschaften unterteilt ist und daß wenigstens eine der Stufen der Sekundärspulen an seinen Enden Anschlüsse zum Abgreifen von Eichsignalen besitzt.
2. Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, daß wenigstens zwei der Stufen (40, 41, 42, 43, 44) von wenigstens einer Spule eine unterschiedliche Anzahl von Wicklungen besitzen.
3. Vorrichtung gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Spulen das Bad von flüssigem Metall (M) umgeben.
4. Vorrichtung gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Spulen praktisch eine zylindrische Form haben, wobei das Ganze neben und in Nähe vom flüssigen Metall angeordnet ist.
5. Vorrichtung gemäß Anspruch 4, dadurch gekennzeichnet, daß zwei Sätze von zylindrischen Spulen (P2, S2, S'2; P3, S3, S'3) übereinander angeordnet sind, wobei der untere Satz (P3, S3, S'3), von gleichen Querabmessungen aber kleinerer Höhe, beim Angießen dient.
6. Vorrichtung gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß sie zwei Sekundärspulen umfaßt, wobei die eine (S, 52, S4) welche in wenigstens zwei Teile (Sa, Sb) unterteilt ist, zur Messung und die andere (S', S'2, S'4) als Referenz dient, die Referenz-Spule ist hierbei gegen die Meßspule geschaltet und kann gegen wenigstens einen der Teile der Meßspule geschaltet werden, welcher sich unter dem Metallspiegel befindet.
7. Vorrichtung zur Füllstandsmessung von flüssigen Metallen (M) in Behältern, insbesondere Stranggießkokillen (K) durch Ortung von aus dem flüssigen Metall stammenden Sekundärmagnetfeldern, begreifend eine Primärspule (P, P2, P4), welche ein zeitlich änderndes Magnetfeld erzeugt, dadurch gekennzeichnet, daß sie eine einzige Sekundärmeßspule (S, S2, S4) umfaßt, welche zwischen dem flüssigen Metall (M) und der Primärspule (P, P2, P4) angeordnet ist, daß die Sekundärspule sich auf praktisch der ganzen Höhe der Primärspule erstreckt und daß die Sekundärspule gegen ein Signal geschaltet ist, welches von der an die Primärspule angelegten Spannung oder von einer Gleichspannungsquelle hergeleitet wird.
8. Vorrichtung gemäß Anspruch 7, dadurch gekennzeichnet, daß eine der Spulen in wenigstens zwei übereinanderliegenden Stufen (40,41,42,43, 44) mit unterschiedlichen magnetischen Eigenschaften unterteilt ist.
EP86100498A 1985-02-01 1986-01-16 Vorrichtung zur Füllstandsmessung in Behältern, insbesondere Stranggiesskokillen Expired EP0192043B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86100498T ATE41617T1 (de) 1985-02-01 1986-01-16 Vorrichtung zur fuellstandsmessung in behaeltern, insbesondere stranggiesskokillen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU85754 1985-02-01
LU85754A LU85754A1 (fr) 1985-02-01 1985-02-01 Dispositif pour mesurer le niveau de remplissage de metaux liquides dans des recipients

Publications (2)

Publication Number Publication Date
EP0192043A1 EP0192043A1 (de) 1986-08-27
EP0192043B1 true EP0192043B1 (de) 1989-03-22

Family

ID=19730401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100498A Expired EP0192043B1 (de) 1985-02-01 1986-01-16 Vorrichtung zur Füllstandsmessung in Behältern, insbesondere Stranggiesskokillen

Country Status (5)

Country Link
EP (1) EP0192043B1 (de)
JP (1) JPS61178616A (de)
AT (1) ATE41617T1 (de)
DE (1) DE3662496D1 (de)
LU (1) LU85754A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3908199A1 (de) * 1989-03-14 1990-09-27 Leybold Ag Vorrichtung zur identifizierung der erstarrungsfront einer schmelze
US5232043A (en) * 1989-03-14 1993-08-03 Leybold Aktiengesellschaft Device for identifying the solid-liquid interface of a melt
DE69025445T2 (de) * 1989-09-19 1996-09-05 Nippon Steel Corp Verfahren und Vorrichtung zur Ermittlung eines Schmelzpegels
ITPN20060005A1 (it) 2006-01-27 2007-07-28 Ergoline S Lab S R L Procedimento e dispositivo per la misura e controllo dell'altezza del metallo liquido in un cristallizzatore.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB834783A (en) * 1955-05-26 1960-05-11 United Steel Companies Ltd Improvements relating to apparatus for controlling the continuous casting of metals
US3366873A (en) * 1966-09-15 1968-01-30 Atomic Energy Commission Usa Linear responsive molten metal level detector
LU80410A1 (de) * 1978-10-25 1980-05-07 Arbed Verfahren zur messung des fuellstandes von metallen in gefaessen,insbesondere in stranggiesskokillen
LU83699A1 (de) * 1981-10-16 1983-06-08 Arbed Verfahren zum ueberwachen einer stranggiesskokille im betrieb
LU83969A1 (de) * 1982-02-23 1983-09-02 Arbed Verfahren zum messen des fuellstandes von fluessigen metallen in stranggiessanlagen
DE3427563C2 (de) * 1984-07-26 1986-12-11 Stopinc Ag, Baar Einrichtung zur elektromagnetischen Füllstandsmessung für metallurgische Gefässe

Also Published As

Publication number Publication date
ATE41617T1 (de) 1989-04-15
JPS61178616A (ja) 1986-08-11
LU85754A1 (fr) 1986-09-02
EP0192043A1 (de) 1986-08-27
DE3662496D1 (en) 1989-04-27

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