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WO2024037827A1 - Procédé, programme informatique et système de refroidissement pour surveiller un composant du système de refroidissement dans un laminoir - Google Patents

Procédé, programme informatique et système de refroidissement pour surveiller un composant du système de refroidissement dans un laminoir Download PDF

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Publication number
WO2024037827A1
WO2024037827A1 PCT/EP2023/070324 EP2023070324W WO2024037827A1 WO 2024037827 A1 WO2024037827 A1 WO 2024037827A1 EP 2023070324 W EP2023070324 W EP 2023070324W WO 2024037827 A1 WO2024037827 A1 WO 2024037827A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
cooling system
characteristic data
actual
coolant
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.)
Ceased
Application number
PCT/EP2023/070324
Other languages
German (de)
English (en)
Inventor
Christoph Hassel
Ulrich Cramer
Jens KIESSLING-ROMANUS
August Sprock
Frank Theobald
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 Group GmbH
Original Assignee
SMS Group GmbH
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 Group GmbH filed Critical SMS Group GmbH
Priority to JP2025508436A priority Critical patent/JP2025529779A/ja
Priority to EP23748463.9A priority patent/EP4572901A1/fr
Publication of WO2024037827A1 publication Critical patent/WO2024037827A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product

Definitions

  • the invention relates to a method and a computer program for monitoring a component of a cooling system in a rolling mill, wherein the cooling system with the component is used to apply a coolant to a rolling stock to be cooled.
  • the invention also relates to the corresponding cooling system.
  • Known cooling systems in rolling mills essentially consist of a cooling section with a plurality of spray nozzles, which are supplied with a coolant via a system of pumps and valves.
  • the coolant is preferably supplied to the spray nozzles at a required pressure;
  • the coolant is kept in an elevated container and/or the required pressure is generated with one or more pumps.
  • the known cooling system typically includes a control device or a control circuit with an actuator for setting or regulating the actual pressure or the actual volume flow with which the coolant is applied to the rolling stock to be cooled.
  • Various components of the cooling system serve as actuators, such as the pumps, valves or the spray nozzles themselves.
  • control devices or control circuits in question offer the advantage of dynamic and precise application of the coolant with a desired target pressure or target volume flow.
  • the use of speed-controlled pumps makes it possible to keep a pressure loss - and thus an energy loss - which is generated by the said actuators in the cooling system as low as possible.
  • a total coolant flow is determined. Taking into account the total coolant flow and the working pressure of the coolant, a pump pressure is determined that should prevail on the inlet side of the pump, so that the working pressure is reached on the inlet side of the valves.
  • a control state for the pump is determined taking into account the total coolant flow, the pump pressure and a suction pressure prevailing on the inlet side of the pump. The valves and the pump are controlled according to the determined control states.
  • the control device takes into account cyclically for the respective point in time when determining the pump pressure in addition to the total coolant flow and the working pressure of the Coolant also causes a change in the total coolant flow.
  • the calibration characteristic curve of the actuators is the target characteristic data of the actuator, which describes the calibrated behavior of the actuator in a wear-free and error-free state during operation of the cooling system, which is preferably also wear-free and error-free.
  • contamination, deposits, corrosion and wear occur on the actuator and in the system in which the actuator is operated. It can also happen that the outlet openings of the spray nozzles become clogged so that the maximum amounts of cooling water can no longer be set. An even one Cooling of the rolling stock across the width of the bench is then no longer possible and there may therefore be a loss of quality during production.
  • Manual condition monitoring of the cooling system can usually only be carried out during a plant shutdown and is usually very labor-intensive, especially given the typical size of a cooling section in a rolling mill with a large number of actuators that need to be monitored with regard to their condition.
  • the invention is based on the object of developing a known method and computer program for monitoring a component of a cooling system in a rolling mill as well as a corresponding known cooling system with the component for applying a coolant to a rolling stock to be cooled in such a way that it also improves over time With a changed system characteristic curve, the coolant is always applied to the rolling stock to be cooled at a desired target pressure or a desired target volume flow.
  • the purpose of the invention is to establish preferably continuous condition monitoring of the components or actuators of cooling systems in a rolling mill.
  • the method provides that actual characteristics for the component are recorded during and/or after an operating time of the component or the actuator of the cooling system and are subsequently compared with the previously determined or predetermined target characteristics for the component.
  • the actual characteristics represent or include the actual state of the component in its environment with any negative changes that may exist.
  • the target characteristics represent the component and its environment in a fault-free, especially wear-free condition.
  • the comparison makes it possible to determine any characteristic data comparison that represents or indicates malfunctioning of the component.
  • the method then provides that measures for minimization adjustment are taken if the characteristic data deviation exceeds a predetermined threshold value.
  • the measure to be taken to minimize the characteristic data deviation can consist of issuing a warning or a note to an operator of the cooling system or to a reporting system for checking and, if necessary, repairing or replacing the respective component.
  • An additional or alternative measure for minimizing the characteristic data deviation can provide: switching on the characteristic data deviation or a correction value calculated from it as a disturbance variable in the sense of a disturbance variable connection to the control device or the controller in order to determine a corrected manipulated variable and to output the corrected manipulated variable Output of the control device or regulator to the component. This allows even better consideration of system characteristics that change over time when controlling the component.
  • the characteristic data deviation or the correction value calculated therefrom can also be applied as a disturbance variable to a setpoint specification device, which is typically connected upstream of the control device or the regulator.
  • the applied characteristic data deviation or the applied correction value calculated from it is then used in the setpoint specification device to adjust the setpoint for the control device or the regulator accordingly.
  • steps (b) to (d3) are repeated several times, preferably continuously, during operation of the cooling system or during breaks in operation of the cooling system. If the repetitions are very frequent, even small changes in the system characteristic curve can be recorded and taken into account when controlling the component or actuator.
  • the component is, for example, a pump, a valve or a spray nozzle within the cooling system.
  • the actual characteristics are at least individual points of an operating characteristic curve of the component, which describes the behavior of the used component during operation of the cooling system at the time of its detection.
  • the term “used component” means that the component shows a different behavior compared to its new or fault-free condition due to signs of use, for example due to deposits or wear.
  • the target characteristics of at least individual points of a calibrated characteristic curve of the component in a fault-free state are recorded by measurement during operation of the cooling system, typically when it is put into operation.
  • the computer program product is a physical, marketable software product that includes software code sections as a program.
  • Figure 1 shows the coolant-side part of the cooling system
  • Figure 2 shows the control part of the cooling system according to a first exemplary embodiment
  • Figure 3 shows a comparison of a calibrated characteristic curve and an operating characteristic curve of a component of the cooling system
  • Figure 4 shows the control part of the cooling system according to the invention according to a second exemplary embodiment
  • Figure 5 shows the control part of the cooling system according to the invention according to a third exemplary embodiment.
  • the invention is described in detail below with reference to the figures mentioned in the form of exemplary embodiments. In all figures, the same technical elements are designated with the same reference numerals.
  • FIG. 1 shows the coolant-side part of the cooling system 100 according to the invention.
  • the cooling system is used to cool a rolling stock 20 in a rolling mill.
  • the cooling system has a supply device 10 in order to provide the coolant, preferably at a predetermined pressure, for cooling the rolling stock.
  • the coolant is conveyed via at least one line 12 from the supply device 10 to an application device 4, for example a cooling beam with spray nozzles, for applying the coolant to the rolling stock 20.
  • an application device 4 for example a cooling beam with spray nozzles
  • the line 12 there is typically a component 3, for example in the form of a pump or a valve installed to control or regulate the pressure of the volume flow with which the coolant is to be supplied to the application device 4.
  • a pressure or volume flow meter 5 is also installed in the line to determine the current actual pressure or actual volume flow of the coolant in the line.
  • Figure 2 shows the control part of the cooling system 100.
  • component 3 here by way of example, functions as an actuator in a control circuit.
  • the control circuit has a setpoint setting device 1, for example in the form of a cooling model for specifying a setpoint pressure or a setpoint volume flow with which the coolant is to be supplied to the application device 4 and applied to the rolling stock 20.
  • the control circuit provides that these target values are compared with the actual values for the pressure or volume flow determined by the pressure or volume flow meter 5 by forming a difference in order to determine a control deviation, which is input into a controller 2.
  • the controller 2 itself serves to output a manipulated variable to the controller 2 downstream component 3, in particular a pump.
  • the controller 2 is designed to form the manipulated variable in such a way that the current actual pressure or actual volume flow of the coolant is adapted or regulated to the specified target pressure or target volume flow.
  • the coolant can also only be set to the specified target pressure or target volume flow as part of a control system.
  • the control circuit in the control there is no feedback of the actual pressure or actual volume flow of the coolant in the line 12 determined by the pressure or volume flow meter 5. Therefore, the dimensioning of the manipulated variable is usually not based on a deviation between target and actual data, but rather based on empirical values.
  • the component 3 does not remain in its original, error-free state during its period of use in the cooling system 100, but rather is subject to contamination, deposits, corrosion and/or wear. As a result, the component in its used condition no longer shows the same control behavior as when it is new or fault-free.
  • Figure 3 illustrates this different behavior of the component in the form of a comparison of a calibrated characteristic and an operating characteristic for the same component.
  • the calibrated characteristic curve represents the target characteristic curve, which shows the optimal behavior of component 3 in a new or fault-free condition.
  • the operating characteristic curve of the same component according to FIG. 3 is somewhat flatter.
  • the operating characteristic curve represents - unlike the calibrated characteristic curve - the real behavior of the same component in used condition after a certain period of operation or use.
  • At least individual points on the calibrated characteristic curve are also referred to below as target characteristics, while at least individual points on the operating characteristic curve are also referred to below as actual characteristics.
  • the operating characteristic is also referred to as the actual operating characteristic.
  • the vertical difference in the diagram in Figure 3, ie the difference in the flow of the component at the same valve opening position between the calibrated characteristic curve and the operating characteristic curve, ie between the new condition and the used condition, is referred to below as characteristic data deviation A.
  • the present invention provides that the cooling system 100 has a detection device 3a for the current degree of opening y of the component 3 and a characteristic data detection device 6 for determining at least individual points of the actual operating characteristic curve for the component 3 .
  • the operating characteristic is a diagram in which, for example, the actual flow Q or actual volume flow V is plotted against the degree of opening y of the component 3.
  • the actual pressure of the coolant can also be plotted against the degree of opening of the component.
  • the characteristic data acquisition device 6 is designed to generate at least individual points of this actual operating characteristic curve for the component as actual characteristic data in accordance with the actual pressure or actual volume flow recorded by the measuring device 5 and the associated detected degree of opening of the component.
  • the present invention provides that the cooling system 100 has a comparison and evaluation device 7 for comparing the actual characteristic data from the characteristic data acquisition device 6 with target characteristic data, which represent at least individual points of a calibrated characteristic curve for the component.
  • the Q(y) diagram in Figures 2, 4 and 5 shows the target characteristics or the calibrated characteristic curve.
  • This comparison makes it possible to determine the characteristic data deviation A illustrated in FIG. 3 and allows this characteristic data deviation to be evaluated as to whether it exceeds a predetermined threshold value or not.
  • the cooling system according to the invention sees one Output device 8 for issuing a notice or a warning to an operator of the cooling system 100 or to a reporting system when the characteristic data deviation A exceeds the threshold value. Alternatively or in addition to this information, an error derived from it can also be output.
  • the characteristic data deviation A is not only determined, but also used sensibly for the regulation or control of the component 3. This is achieved, for example, by applying the characteristic data deviation, which, as mentioned, represents the different behavior of the used component 3 compared to the new, error-free component, or a correction value calculated therefrom as a disturbance variable to the control device or the controller 2.
  • This disturbance variable connection 9 enables the control device or the controller 2 to determine a corrected manipulated variable and to output it to the component 3.
  • the corrected manipulated variable takes into account the used state of the component and its resulting changed setting behavior. In this way, a precise setting or regulation of the actual pressure or the actual volume flow of the coolant to the corresponding given target values is possible.
  • the characteristic data deviation A or the correction value calculated from it can also be output as a disturbance variable to the setpoint specification device 1.
  • the setpoint setting device 1 takes into account the setting behavior of the component 3 that has changed through use when calculating the setpoint pressure or the setpoint volume flow, which is output to the control device or the regulator 2.
  • Figure 4 shows the connection of the disturbance variable to both the control device or the regulator 2 and to the setpoint specification device 1.
  • Figure 5 shows the disturbance variable connection only to the setpoint specification device 1.
  • the said characteristic data acquisition device 6 is not only suitable for determining at least individual points of the actual operating characteristic curve for the component 3 in their used condition. Rather, the characteristic data acquisition device 6 is equally suitable for determining at least individual points of the calibrated characteristic curve for the component, namely when the component 3 is operated in its new or error-free state in a preferably also new or error-free system environment. These at least individual points of the calibrated characteristic curve, also called target characteristic data, are typically measured by measurement when the cooling system and in particular the component are put into operation.
  • Component ( actuator), especially valve, pump or spray nozzle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

L'invention concerne un procédé et un programme informatique pour surveiller un composant d'un système de refroidissement dans un laminoir, le système de refroidissement comprenant le composant étant utilisé pour appliquer un liquide de refroidissement sur un produit laminé à refroidir. Afin de pouvoir appliquer un liquide de refroidissement sur le produit à laminer à une pression cible souhaitée ou un débit volumique cible souhaité, non seulement lorsque le composant est dans le nouvel état mais également lorsque le composant est dans l'état utilisé, le système de refroidissement selon l'invention permet l'acquisition de données caractéristiques réelles pour le composant pendant et/ou après la période d'utilisation du composant 3. Ces données caractéristiques réelles sont comparées à des données caractéristiques cibles prédéterminées afin de déterminer un écart de données caractéristiques possible Δ, qui représente un dysfonctionnement du composant 3 par rapport à son nouvel état. La présente invention fournit ensuite diverses mesures pour réduire à un minimum l'écart de données caractéristiques, si celui-ci dépasse une valeur seuil prédéterminée.
PCT/EP2023/070324 2022-08-15 2023-07-21 Procédé, programme informatique et système de refroidissement pour surveiller un composant du système de refroidissement dans un laminoir Ceased WO2024037827A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2025508436A JP2025529779A (ja) 2022-08-15 2023-07-21 圧延機内の冷却システムの構成成分を監視する方法、コンピュータプログラム、及び冷却システム
EP23748463.9A EP4572901A1 (fr) 2022-08-15 2023-07-21 Procédé, programme informatique et système de refroidissement pour surveiller un composant du système de refroidissement dans un laminoir

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022208447.0 2022-08-15
DE102022208447.0A DE102022208447A1 (de) 2022-08-15 2022-08-15 Verfahren, Computerprogramm und Kühlsystem zum Überwachen einer Komponente des Kühlsystems in einem Walzwerk

Publications (1)

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WO2024037827A1 true WO2024037827A1 (fr) 2024-02-22

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PCT/EP2023/070324 Ceased WO2024037827A1 (fr) 2022-08-15 2023-07-21 Procédé, programme informatique et système de refroidissement pour surveiller un composant du système de refroidissement dans un laminoir

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EP (1) EP4572901A1 (fr)
JP (1) JP2025529779A (fr)
DE (1) DE102022208447A1 (fr)
WO (1) WO2024037827A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119549526B (zh) * 2025-01-26 2025-06-03 广东赛福智能装备有限公司 冷却故障检测方法、装置、板带钢冷却设备及存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61249562A (ja) * 1985-04-30 1986-11-06 Kawasaki Steel Corp ノズル詰まり検出方法及び装置
EP3495056A1 (fr) 2017-12-11 2019-06-12 Primetals Technologies Austria GmbH Commande améliorée de la gestion de l'eau d'un circuit de refroidissement
US20210332456A1 (en) * 2020-04-24 2021-10-28 Kocks Technik Gmbh & Co Kg Apparatus for cooling long products and method of cooling a long product using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61249562A (ja) * 1985-04-30 1986-11-06 Kawasaki Steel Corp ノズル詰まり検出方法及び装置
EP3495056A1 (fr) 2017-12-11 2019-06-12 Primetals Technologies Austria GmbH Commande améliorée de la gestion de l'eau d'un circuit de refroidissement
US20210332456A1 (en) * 2020-04-24 2021-10-28 Kocks Technik Gmbh & Co Kg Apparatus for cooling long products and method of cooling a long product using the same

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Mess-, Steuer- und Regelungstechnik", INSTITUTS FÜR VERFAHRENSTECHNIK DER UNIVERSITÄT LINZ
HILD B: "WASSERHYDRAULIK IN DER ANWENDUNG - ENTZUNDERUNGSSYSTEME IN WALZWERKS-ANLAGEN", O & P - OELHYDRAULIK UND PNEUMATIK: ZEITSCHRIFT FUER FLUIDTECHNIK, AKTORIK, STEUERELEKTRONIK UND SENSORIK, VEREINIGTE FACHVERLAGE GMBH, DE, vol. 43, no. 6, 1 June 1999 (1999-06-01), XP000834232, ISSN: 0341-2660 *

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DE102022208447A1 (de) 2024-02-15
EP4572901A1 (fr) 2025-06-25
JP2025529779A (ja) 2025-09-09

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