EP0494805B1 - Messfühler zur Kontrolle der Sekundärkühlung einer Stranggiessmaschine, ein Anfahrstrang, ausgestattet mit diesen Messfühlern, und Verfahren zur Kontrolle einer Stranggiessmaschine - Google Patents

Messfühler zur Kontrolle der Sekundärkühlung einer Stranggiessmaschine, ein Anfahrstrang, ausgestattet mit diesen Messfühlern, und Verfahren zur Kontrolle einer Stranggiessmaschine Download PDF

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Publication number
EP0494805B1
EP0494805B1 EP92400013A EP92400013A EP0494805B1 EP 0494805 B1 EP0494805 B1 EP 0494805B1 EP 92400013 A EP92400013 A EP 92400013A EP 92400013 A EP92400013 A EP 92400013A EP 0494805 B1 EP0494805 B1 EP 0494805B1
Authority
EP
European Patent Office
Prior art keywords
cooling
temperature
casting machine
sensor
booms
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
EP92400013A
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English (en)
French (fr)
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EP0494805A1 (de
Inventor
Philippe Gheeraert
Joseph Nave
Bernard Vandenbussche
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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Publication date
Application filed by Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0494805A1 publication Critical patent/EP0494805A1/de
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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
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
    • 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

Definitions

  • the invention relates to continuous casting machines which comprise, in the spans separating the rollers, secondary cooling ramps. These ramps provide cooling by water spraying, by means of water spraying elements constituted by spray nozzles or atomizers. (AT-B 377 460).
  • the present invention therefore aims to provide a sensor which allows the control of secondary cooling in a precise and reliable manner.
  • the subject of the invention is therefore a sensor for controlling the secondary cooling of a continuous casting machine which comprises secondary cooling ramps provided with water diffusers and arranged in the spans separating the rollers, said sensor being driven so as to circulate in front of said cooling ramps, characterized in that it consists of a sealed enclosure of reduced volume which has a wall of insulating material provided with a thermally conductive pad which is arranged so as to face the cooling ramps during of the circulation of the sensor, the other walls of said enclosure being thermally insulating, in that at least one electrical heating resistor is disposed in said enclosure, in that the one or more resistors are controlled so as to regulate the temperature in said enclosure at a set value and in that it includes a temperature sensor disposed in s said waterproof enclosure.
  • the senor comprises at least one electrical heating resistance arranged in said enclosure.
  • the sensor comprises a resistance of low power for setting in temperature and a resistance of high power for regulating the temperature of the ambient air of the enclosure.
  • the time constant of the temperature regulation device is greater than the time of passage before a cooling ramp and less than the time of passage between two cooling ramps.
  • the invention also relates to a dummy for controlling a continuous casting machine with an ingot mold, the head of which is equipped with means for controlling the parameters of the machine and which is characterized in that it comprises two rows of sensors , a row being arranged in the upper surface and the second row being arranged in the lower surface of the dummy.
  • the sensors can each be arranged so as to be in front of a diffuser; according to another alternative embodiment, the sensors are each arranged in the overlap zone of two diffusers adjacent to a ramp.
  • the invention also relates to a process for controlling the secondary cooling ramps of a continuous casting machine, which is characterized in that a dummy of the aforementioned type is made to circulate, in that a curve is noted. of temperature and in that this temperature curve is compared with a reference temperature curve.
  • a reference temperature curve is empirically determined and the curve recorded during a passage of the manikin in the machine is compared with this reference curve to verify the correct functioning of the secondary cooling device.
  • the curve of the derivative of the temperature supplied by the sensors is noted, so as to overcome the speed of movement of the dummy.
  • the present invention consists in using a temperature sensor which will be placed in front of the secondary cooling ramps at the location where the skin of the slab will be when the continuous casting machine is operating.
  • Figure 1 shows schematically in section a sensor according to the present invention; it essentially consists of a sealed enclosure 1 of reduced volume which is for example constituted by a recess arranged in a housing 2.
  • This housing 2 is preferably made of a material resistant to corrosion and to temperature.
  • the open face of the cavity 1 is closed by a cover 3 made of insulating material provided with a thermally conductive central stud 12; this cover is fixed to the housing 2 by means of screws 4.
  • An O-ring 5 seals the enclosure 1.
  • the enclosure 1 is a tight enclosure of low volume thermally insulated, with the exception of the stud 12 with which the cover 3 is provided.
  • the sealed enclosure 1 there is at least one electrical heating resistor which is intended to regulate the temperature of the enclosure to a set temperature.
  • the sealed enclosure 1 comprises two electrical resistors 6 and 7; a first resistor 6, of low power is used to maintain an equilibrium at a set temperature in the ambient air and the other, the resistor 7 of high power is used to ensure a rapid rise in temperature following cooling due to passage under a secondary cooling ramp.
  • the setpoint temperature is for example 70 ° C. and the second high-power resistance is for example adjusted to heat the sealed enclosure 1 as soon as the ambient air temperature has a relatively small variation from the set value, for example 3 ° C.
  • the housing 2 comprises a threaded base 8 intended for fixing the sensor to a support; advantageously, an O-ring 9 is provided to seal the housing 2 on this support.
  • the temperature at the level of the pad 12 is measured by means of a temperature sensor advantageously constituted by an integrated circuit 11 which is arranged in said enclosure 1 in the vicinity of the pad 12 which constitutes a thermally conductive face of the enclosure 1; this stud 12 is subjected to the action of the secondary cooling ramps and is preferably located on the path of the skin of the slab which circulates during the operation of the continuous casting machine.
  • the sensor which has just been described is used in the following manner: the resistor or resistors are controlled to maintain the temperature of the air in the enclosure at a constant value, for example 70 ° C.
  • the sensor according to the invention is brought before a secondary cooling ramp at the place where the skin of the slab is located during the operation of the continuous casting machine and the cooling transmitted by means of the integrated circuit 11 is measured. the thermally conductive pad 12.
  • the device for regulating the heating by the resistors then acts to bring the temperature back to its set value.
  • FIG. 2 schematically represents the head of a dummy or false ingot which is introduced into the machine for priming the casting.
  • the invention also relates to a dummy or false ingot which is introduced into the machine for initiating the casting.
  • This false ingot is equipped with sensors intended to measure all the parameters of the ingot mold in order to carry out a functioning check. To this end, this dummy is introduced to the bottom of the machine in the absence of casting and it detects in passing the various parameters of the machine.
  • This mannequin is equipped with temperature sensors in accordance with the present invention.
  • a sensor is provided by a cooling water diffuser.
  • the sensors are arranged in the row in a location corresponding to that of the diffuser.
  • each thermal sensor is arranged so as to be in the overlap zone of two diffusers adjacent to a ramp.
  • a number of sensors is provided that is one unit lower than the number of diffusers.
  • the mannequin comprises two rows of sensors, a first row arranged so as to pass in front of the upper surface of the ingot mold and the second scroll past the lower surface of the ingot mold.
  • the dummy is introduced at the bottom of the machine, then it is moved in the machine so that the head of the mannequin scrolls past all the rollers and spans of the mold. This operation makes it possible to measure in a single movement all of the operating parameters of the continuous casting machine and possibly to determine the adjustments to be made in order to obtain correct operating conditions.
  • the temperature at the stud 12 is continuously measured during the movement of the manikin and the temperature curve or profile is noted for the entire movement of the manikin.
  • the time constant of the temperature regulation device T is advantageously greater than the time taken to pass a ramp 21 so as to be able to detect a clear change in temperature; this time constant is moreover less than the time corresponding to the passage between two adjacent ramps so that the temperature returns well to the set temperature when the sensor scrolls in front of the roller 23.
  • Curve A noted is compared to a setpoint curve corresponding to the optimal operating conditions of the secondary cooling device and the difference between the two curves makes it possible to determine the existence of a fault in a secondary cooling ramp.
  • the signal corresponding to the derivative with respect to time of the temperature is used at the level of the pad 12. This makes it possible to overcome the variations in speed which can occur between two passages in front of a ramp. This also improves the accuracy of the system.
  • the reference curve or signature of the machine will be corrected after each repair of a segment of machine so as to obtain a theoretically perfect signature when all the segments of the machine have been the subject of a revision.
  • the temperature at the level of pad 12 was brought to the temperature Tc, for example 70 ° C., by means of the low power resistance, the high power resistance only serving to effect the regulation for each variation. of temperature due to the passage in front of a cooling ramp.
  • the threshold for triggering of heating by this high-power resistance is 3 ° C.
  • the invention therefore makes it possible to carry out a rapid and precise measurement of the cooling effect of the various diffusers of the secondary cooling system.
  • the invention allows an assessment to be made for each of the diffusers. We can then intervene, if necessary, on the diffuser or diffusers that do not have a normal operating characteristic.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Measuring Volume Flow (AREA)

Claims (10)

  1. Sensor zur Kontrolle der Sekundärkühlung einer Stranggießmaschine, welche Sekundärkühlungsgalerien (21) aufweist, die mit Wasserdiffusoren versehen sind und in den die Rollen (23) trennenden Fächern (32) angeordnet sind, wobei der Sensor so bewegt wird, daß er vor den Kühlgalerien (21) vorbeiläuft, dadurch gekennzeichnet, daß er durch einen dichten Raum (1) mit reduziertem Volumen gebildet ist, welcher eine Wand (3) aus isolierendem Material aufweist, die mit einer thermisch leitenden Steckstelle (12) versehen ist, die so angeordnet ist, daß sie den Kühlgalerien (21) beim Umlaufen des Sensors zugekehrt ist, wobei die anderen Wände des Raumes (1) thermisch isolierend sind, dadurch, daß wenigstens ein elektrischer Heizwiderstand (6, 7) in dem Raum angeordnet ist, daß der oder die Widerstände (6, 7) so gesteuert werden, daß die Temperatur in dem Raum auf einen Sollwert geregelt wird, und daß er einen in dem abgedichteten Raum angeordneten Temperatursensor (11) aufweist.
  2. Sensor zur Kontrolle der Sekundärkühlung einer Stranggießmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Temperatursensor (11) durch eine integrierte Schaltung gebildet ist.
  3. Sensor zur Kontrolle der Sekundärkühlung einer Stranggießmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß er zwei in dem Raum angeordnete elektrische Heizwiderstände aufweist, einen Widerstand (6) geringer Leistung zum Aufheizen und einen Widerstand (7) hoher Leistung zur Regelung der Temperatur der Umgebungsluft an der Steckstelle (12).
  4. Sensor zur Kontrolle der Sekundärkühlung einer Stranggießmaschine nach Anspruch 3, dadurch gekennzeichnet, daß die Solltemperatur der Regelung ungefähr 70°C beträgt.
  5. Sensor zur Kontrolle der Sekundärkühlung einer Stranggießmaschine nach irgendeinem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Zeitkonstante der Temperaturregelvorrichtung über der Zeit für den Durchgang vor einer Kühlgalerie und unter der Zeit für den Durchgang zwischen zwei Kühlgalerien liegt.
  6. Anfahrstück für die Überwachung einer Kokillenstranggießmaschine, dessen Kopf mit Mitteln zur Kontrolle der Maschine versehen ist, dadurch gekennzeichnet, daß es zwei Reihen von Sensoren nach irgendeinem der Ansprüche 1 bis 5 aufweist, wobei eine Reihe der äußeren Wölbfläche der Kokille und die zweite Reihe der inneren Wölbfläche der Kokille zugekehrt angeordnet ist.
  7. Anfahrstück nach Anspruch 6, bestimmt zur Überwachung des Arbeitens von Sekundärkühlgalerien, die jeweils mehrere Wasserdiffusoren aufweisen, dadurch gekennzeichnet, daß die Sensoren des Anfahrstücks jeweils so angeordnet sind, daß sie vor einem Diffusor einer Galerie vorbeilaufen.
  8. Anfahrstück nach Anspruch 6, bestimmt zur Überwachung des Arbeitens von Sekundärkühlgalerien, die jeweils mehrere Wasserdiffusoren aufweisen, dadurch gekennzeichnet, daß die Senoren des Anfahrstücks so angeordnet sind, daß sie vor der Überdeckungszone von zwei benachbarten Diffusoren einer Galerie vorbeilaufen.
  9. Verfahren zur Überwachung der Sekundärkühlgalerien einer Stranggießmaschine, dadurch gekennzeichnet, daß ein Anfahrstück nach irgendeinem der Ansprüche 6 bis 8 laufen gelassen wird, daß eine Temperaturkurve aufgenommen wird, und daß diese Temperaturkurve mit einer Referenztemperaturkurve verglichen wird.
  10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß ein Signal verwendet wird, welches dem Differentialquotienten der von den Sensoren gelieferten Temperatur entspricht.
EP92400013A 1991-01-10 1992-01-03 Messfühler zur Kontrolle der Sekundärkühlung einer Stranggiessmaschine, ein Anfahrstrang, ausgestattet mit diesen Messfühlern, und Verfahren zur Kontrolle einer Stranggiessmaschine Expired - Lifetime EP0494805B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9100247 1991-01-10
FR9100247A FR2671502B1 (fr) 1991-01-10 1991-01-10 Capteur de refroidissement secondaire d'une machine de coulee continue, mannequin equipe de tels capteurs et procede de controle d'une machine de coulee continue.

Publications (2)

Publication Number Publication Date
EP0494805A1 EP0494805A1 (de) 1992-07-15
EP0494805B1 true EP0494805B1 (de) 1994-07-27

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EP92400013A Expired - Lifetime EP0494805B1 (de) 1991-01-10 1992-01-03 Messfühler zur Kontrolle der Sekundärkühlung einer Stranggiessmaschine, ein Anfahrstrang, ausgestattet mit diesen Messfühlern, und Verfahren zur Kontrolle einer Stranggiessmaschine

Country Status (15)

Country Link
EP (1) EP0494805B1 (de)
JP (1) JPH0557415A (de)
KR (1) KR920014539A (de)
AR (1) AR247123A1 (de)
AT (1) ATE109047T1 (de)
BR (1) BR9200047A (de)
CA (1) CA2059040A1 (de)
CS (1) CS6292A3 (de)
DE (1) DE69200256T2 (de)
FI (1) FI920095A (de)
FR (1) FR2671502B1 (de)
NO (1) NO920096L (de)
PL (1) PL293130A1 (de)
YU (1) YU1492A (de)
ZA (1) ZA92147B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3336257B2 (ja) * 1998-07-07 2002-10-21 株式会社青山製作所 ボルト
KR20040050175A (ko) * 2002-12-09 2004-06-16 (주)진합 상이한 피치의 나사산을 갖는 볼트
CN102407309B (zh) * 2011-11-21 2013-06-19 河北钢铁股份有限公司邯郸分公司 一种连铸机二冷水在线测量方法及专用装置
US10722824B2 (en) 2016-10-18 2020-07-28 Ecolab Usa Inc. Device to separate water and solids of spray water in a continuous caster, and method to monitor and control corrosion background
CN111468691B (zh) * 2020-06-12 2021-08-20 江苏隆达超合金股份有限公司 一种铜镍合金半连续圆铸锭引锭头
KR102529732B1 (ko) * 2021-08-31 2023-05-08 주식회사 경신 차량용 유온센서모듈

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7811774A (nl) * 1978-12-01 1980-06-03 Hoogovens Ijmuiden Bv Werkwijze voor het controleren van vloeistofsproeiers in een continu-gietmachine en een meetdoos te gebrui- ken daarbij.
CH646352A5 (en) * 1980-01-11 1984-11-30 Vnii Avtom Chernoi Metallurg Apparatus for regulating the secondary cooling in a continuous-casting installation with batchwise smelt supply via a tundish
AT377460B (de) * 1982-03-18 1985-03-25 Voest Alpine Ag Vorrichtung zum ueberpruefen der spritzduesen einer stranggiessmaschine
JPS58168466A (ja) * 1982-03-30 1983-10-04 Nippon Steel Corp 連続鋳造装置の２次冷却装置

Also Published As

Publication number Publication date
PL293130A1 (en) 1992-09-07
JPH0557415A (ja) 1993-03-09
YU1492A (sh) 1995-10-03
FI920095A0 (fi) 1992-01-09
DE69200256D1 (de) 1994-09-01
NO920096L (no) 1992-07-13
FR2671502B1 (fr) 1993-04-30
CA2059040A1 (fr) 1992-07-09
FR2671502A1 (fr) 1992-07-17
KR920014539A (ko) 1992-08-25
AR247123A1 (es) 1994-11-30
EP0494805A1 (de) 1992-07-15
NO920096D0 (no) 1992-01-08
ZA92147B (en) 1993-07-09
ATE109047T1 (de) 1994-08-15
FI920095A (fi) 1992-07-11
BR9200047A (pt) 1992-09-08
DE69200256T2 (de) 1995-03-30
CS6292A3 (en) 1992-08-12

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