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EP1464421B1 - Capteur du niveau du métal liquide dans une lingotière de coulée continu et procédé de son fonctionnement - Google Patents

Capteur du niveau du métal liquide dans une lingotière de coulée continu et procédé de son fonctionnement Download PDF

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Publication number
EP1464421B1
EP1464421B1 EP04003453A EP04003453A EP1464421B1 EP 1464421 B1 EP1464421 B1 EP 1464421B1 EP 04003453 A EP04003453 A EP 04003453A EP 04003453 A EP04003453 A EP 04003453A EP 1464421 B1 EP1464421 B1 EP 1464421B1
Authority
EP
European Patent Office
Prior art keywords
sensor
mould
pivot
movements
mold
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 - Lifetime
Application number
EP04003453A
Other languages
German (de)
English (en)
Other versions
EP1464421A1 (fr
Inventor
Peter Jonen
Axel Stavenow
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1464421A1 publication Critical patent/EP1464421A1/fr
Application granted granted Critical
Publication of EP1464421B1 publication Critical patent/EP1464421B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • B22D11/201—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level

Definitions

  • the invention relates to a sensor for detecting the filling level of liquid metal in the mold of a continuous casting with a manipulator for guiding the sensor, wherein the manipulator with the sensor arranged on it using a detachable connection, in particular by means of clamping on or on the mold or is attached to the water tanks and the sensor is thus coupled to the movements of the mold.
  • the invention also relates to a method for operating the sensor.
  • the mold level control of in particular thin slab continuous casting molds can be controlled by means of a sensor which projects from above into the mold opening. After completion of the necessary preparations of the mold for the casting process, the sensor is swiveled manually or automatically into the interior of the mold shortly before the start of casting. In the event of accidents that could lead to its damage, it is immediately swung out of the danger zone.
  • US Pat. No. 4,186,792 discloses a continuous casting control apparatus using eddy current measuring equipment for determining the distance of the melt from a reference point of the mold, which generates a signal by means of non-contact measurement, the measuring apparatus being mounted tightly above the metal mirror.
  • the measuring device for eddy current measurement is arranged vertically adjustable close to the surface of the liquid metal, in accordance with changes the metal mirror, the measuring device is always kept at the same distance from this.
  • a potentiometer disposed thereon generates a signal indicative of the distance and transmits it to a recorder or uses it to adjust the feed or discharge amount of melt by means of a monitoring and control device to keep the metal level constant.
  • the document EP 0 067 668 B1 describes an apparatus for measuring a change in a predetermined direction of a surface position of a metal mass.
  • the device comprises a magnetic-based metal sensor, a drive device for the sensor, a follower device that causes the sensor to follow the change in the position of the metal mass, and devices for generating a position signal for a momentary position of the sensor on a movement path, furthermore A disturbance signal storage means for measuring a disturbance component in the output of the sensor due to factors other than the change of the surface position of the metal mass, and a correcting means for correcting the difference signal by the disturbance component stored in the storage means to activate the drive means with this corrected signal.
  • the document WO 00/38858 relates to a method and a device for detecting and regulating the level of a molten metal in a mold, in particular for a continuous casting plant for steel, wherein the melt from a feed opening having a closable bottom opening can be supplied to the mold via a dip tube, with a measuring element, which is vertically movable in the free space of the mold can be introduced.
  • the level measuring element is connected via a first signal line to a computer which is connected via a first control line with a first actuator in connection, to which a boom is attached, at the head end of the level measuring element is mounted.
  • a Positonsmessferler On the boom a Positonsmessferler is provided, which has a second signal line is connected to the computer, which communicates via a second control line with a second actuator, which is associated with a shut-off device for closing the bottom opening of the Zubuchgefäßes.
  • the document JP 08 168 860 A describes a method for measuring the current surface level of liquid steel in a mold of a continuous casting plant.
  • the change distance is measured with a height indicator.
  • Laser beam sensors are arranged to settle the position when observing the height or depth mark of the measuring rod.
  • Casting powder with an unmelted and a molten layer cover the molten steel.
  • the output of the altitude measuring device is input to an amplifier.
  • a drive for a display bar is activated and submerged with adequate depth in the molten steel.
  • a diameter difference of the rod between the immersed in the casting powder and the steel melt in the areas is detected. After a predetermined time, the rod is pulled out. In this case, the diameter of the material adhering to the rod is detected by means of laser beams.
  • the document US 4,647,854 relates to a device for measuring the level of molten metal in an oscillating mold of a continuous casting plant during operation with an eddy current measuring device.
  • the oscillation of the mold is extracted from the output signal of the distance measurement while compensating and controlling the measurement sensitivity of the distance measuring device to keep constant the amount of amplitude of the oscillation signal component, thereby linearizing the surface level of the melt.
  • the document JP 6 000 601 A describes a device for measuring the level of liquid metal in a continuous casting mold.
  • the holder of the level sensor firmly connected to the mold or the water tank.
  • the present invention seeks to provide a sensor for detecting the level of the molten metal level in a mold of a continuous casting and a method for its operation, which follows the movements of the mold with as precise and play-free guidance of the sensor in the event of a fault, it responds almost instantaneously.
  • the senor for detecting the filling level of the liquid metal in the mold of the continuous casting is characterized by a pivot drive for a pivotable about the axis x-x lever arm, at the free end of the sensor is fixed by a holder.
  • the sensor has in one embodiment alternatively pneumatic or hydraulic rotary actuators, for example.
  • Rotary piston or electromechanical or magnetic part-turn actuators to its at least rotary drive.
  • the releasable clamping device for attaching the manipulator can be provided on at least one broad side or narrow side wall of the mold or its water boxes or on the peripheral frame.
  • the senor is pivoted by the manipulator before the casting operation by a pivoting movement of its lever arm about the axis of the pivot drive from a neutral position above the Kokilleng manraumes in the active measurement position within the mold.
  • the method according to the invention further provides that the sensor in predetermined movements for detecting the filling level and position of the metal mirror in the mold by means of pivoting movements about the axis of the lever arm and, if necessary, by means of linear extension or shortening movement and / or possibly by rotation about the Vertical axis of the rotary actuator in accordance with control signals of a programmable signal transmitter is performed.
  • the method according to the invention provides that the sensor is turned out on receipt of a fault signal by swinging the lever arm from the Kokilleng manraum in a neutral position.
  • the operating method for the sensor of the aforementioned type provides according to the invention that its movements are performed manually or automatically.
  • the manipulator shown in Figures 1 and 2 has the task to guide a sensor 1 for detecting the level of liquid metal level in a mold 2 of a continuous casting.
  • the sensor is used for the mold level control.
  • the manipulator is fixed by means of a releasable clamping on the mold 2 and its water boxes 12, so that the sensor 1 is coupled to the movements of the mold 2.
  • the clamping consists in the illustrated embodiment of a arranged on guide rails 14 mounting plate 3 with a tilt and screw clamp 13th
  • the manipulator comprises a pivot drive 4 which can be connected to the fastening plate 3 and has a lever arm 5 which can be driven rotatably about the longitudinal axis xx and at whose free end 7 the sensor 1 can be fastened by means of a preferably right-hand holding rod 8.
  • a pivot drive 4 which can be connected to the fastening plate 3 and has a lever arm 5 which can be driven rotatably about the longitudinal axis xx and at whose free end 7 the sensor 1 can be fastened by means of a preferably right-hand holding rod 8.
  • the manipulator with pneumatic or hydraulic swivel assembly 6 is designed as a rotary piston 9 or equipped with electromechanical or magnetic rotary actuators.
  • the manipulator is optionally rotatable about its vertical axis z-z, for which purpose an additional horizontal rotary piston 9 'can be arranged in the pivot drive 4, as shown in FIG.
  • a floating layer of slag or casting powder is referred to within the mold 2, which is required as a lubricant to achieve optimum sliding between the molten steel and the wall of the mold 2.
  • the operation of the manipulator or its movements can be performed manually or automatically.
  • the sensor 1 is just before casting start by a pivoting movement of the pivot drive 4 by the lever arm 5 about the axis xx from a neutral position above the mold 2 in a measuring position just above the bath level 10 corresponding to the level height the melt has been swung in the mold.
  • a particular advantage of the operating method is given by the fact that the manipulator turns out the sensor 1 from the mold 2 in a neutral position upon receipt of a disturbance signal by swinging the lever arm 5, to prevent endangerment of the sensor for detecting the level height.
  • the manipulator may additionally be designed such that the sensor 1 fastened in the holder 8 can be moved or adjusted in the direction of the xx axis of the lever arm 5 by means of linear extension or shortening movements, see arrow 11. Also possible is an embodiment of the manipulator to the effect that the pivot drive 4 leads out by rotation about its vertical axis out of the region of the Kokilleng manraumes in a top neutral position unscrewed sensor 1. For this purpose, as shown in Figure 2, the horizontally disposed rotary piston 9 'are acted upon by hydraulic media.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)

Claims (7)

  1. Capteur (1, 4, 5) pour l'enregistrement du niveau de remplissage par du métal liquide de la lingotière (2) d'une installation de coulée continue, comprenant un manipulateur pour guider le capteur, le manipulateur étant fixé avec le capteur (1) qui est disposé dessus, en utilisant une connexion détachable, notamment au moyen d'un serrage sur ou au niveau de la lingotière (2) ou sur ses caisses à eau (12) et le capteur (1) étant ainsi couplé aux mouvements de la lingotière (2),
    caractérisé par
    une commande de pivotement (4) pour un bras de levier (5) pouvant pivoter autour de l'axe (x-x) à l'extrémité libre (7) duquel le capteur (1) est fixé au moyen d'un support (8).
  2. Capteur (1, 4, 5) selon la revendication 1,
    caractérisé par
    des commandes de pivotement pneumatiques ou hydrauliques (4), par exemple des pistons rotatifs (9) ou des commandes de pivotement électromécaniques ou magnétiques pour l'entraîner du moins en rotation (6).
  3. Capteur (1, 4, 5) selon la reveridication 1 ou 2,
    caractérisé par
    un dispositif de serrage amovible (13) pour sa fixation sur au moins une des parois de côté large ou de côté étroit de la lingotière (2) ou sur ses caisses à eau ou châssis périphériques.
  4. Procédé d'utilisation du capteur (1, 4, 5) selon les revendications 1 à 3,
    caractérisé en ce que
    le capteur (1, 4, 5), avant le début de la coulée, par un mouvement de pivotement du bras de levier (5) autour de l'axe (x-x) de la commande de pivotement (4), pivote depuis une position neutre au dessus de l'espace de coulée de la lingotière vers la position de mesure active à l'intérieur de la lingotière.
  5. Procédé selon la revendication 4,
    caractérisé en ce que
    le capteur (1, 4, 5) est guidé dans des mouvements prescriptibles pour l'enregistrement du niveau de remplissage et de la position du niveau de métal dans la lingotière (2) au moyen de mouvements de pivotement autour de l'axe (x-x) du bras de levier (5) ainsi que, si c'est nécessaire, au moyen de mouvements linéaires d'allongement ou de raccourcissement (flèche 11) et/ou le cas échéant par rotation autour de l'axe vertical (z-z) de la commande de pivotement (4) en fonction de signaux de commande d'un émetteur de signaux programmable.
  6. Procédé selon une ou plusieurs des revendications 4 ou 5,
    caractérisé en ce que
    le capteur (1, 4, 5), en cas d'entrée d'un signal de perturbation, par pivotement vers l'extérieur du bras de levier (5), est détourné de l'espace de coulée de la lingotière (2) vers une position neutre.
  7. Procédé selon une ou plusieurs des revendications 4 à 6,
    caractérisé en ce que
    les mouvements du capteur (1, 4, 5) sont exécutés manuellement ou automatiquement.
EP04003453A 2003-03-19 2004-02-17 Capteur du niveau du métal liquide dans une lingotière de coulée continu et procédé de son fonctionnement Expired - Lifetime EP1464421B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10312080A DE10312080A1 (de) 2003-03-19 2003-03-19 Manipulator für einen Gießspiegel-Sensor einer Kokille einer Stranggießanlage
DE10312080 2003-03-19

Publications (2)

Publication Number Publication Date
EP1464421A1 EP1464421A1 (fr) 2004-10-06
EP1464421B1 true EP1464421B1 (fr) 2006-04-26

Family

ID=32842155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04003453A Expired - Lifetime EP1464421B1 (fr) 2003-03-19 2004-02-17 Capteur du niveau du métal liquide dans une lingotière de coulée continu et procédé de son fonctionnement

Country Status (3)

Country Link
EP (1) EP1464421B1 (fr)
AT (1) ATE324208T1 (fr)
DE (2) DE10312080A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5376926A (en) * 1976-12-21 1978-07-07 Nippon Kokan Kk Molten metal level monitor controller of continuous casting machine that use eddy flow system range finder for measurement of molten metal level
JPS6057217A (ja) * 1983-09-09 1985-04-03 Nippon Kokan Kk <Nkk> 渦流式モ−ルド湯面計
DE19918835A1 (de) * 1998-12-23 2000-07-06 Sms Demag Ag Verfahren zum Erfassen und Regeln der Füllstandshöhe des flüssigen Metalls in einer Kokille

Also Published As

Publication number Publication date
EP1464421A1 (fr) 2004-10-06
DE10312080A1 (de) 2004-09-30
ATE324208T1 (de) 2006-05-15
DE502004000455D1 (de) 2006-06-01

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