EP2203263B1 - Procédé de fonctionnement d'un circuit de refroidissement à saisie centralisée de caractéristiques de vannes et objets correspondants - Google Patents

Procédé de fonctionnement d'un circuit de refroidissement à saisie centralisée de caractéristiques de vannes et objets correspondants Download PDF

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Publication number
EP2203263B1
EP2203263B1 EP20080803522 EP08803522A EP2203263B1 EP 2203263 B1 EP2203263 B1 EP 2203263B1 EP 20080803522 EP20080803522 EP 20080803522 EP 08803522 A EP08803522 A EP 08803522A EP 2203263 B1 EP2203263 B1 EP 2203263B1
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EP
European Patent Office
Prior art keywords
coolant
valve
cooling section
automation device
valves
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Active
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EP20080803522
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German (de)
English (en)
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EP2203263A1 (fr
Inventor
Markus Forsch
Udo Borgmann
Stefan Schmors
Klaus Weinzierl
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Primetals Technologies Germany GmbH
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Siemens AG
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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
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • 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
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B21B37/76—Cooling control on the run-out table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • 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
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0324—With control of flow by a condition or characteristic of a fluid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0324—With control of flow by a condition or characteristic of a fluid
    • Y10T137/0363—For producing proportionate flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87917—Flow path with serial valves and/or closures
    • Y10T137/87925—Separable flow path section, valve or closure in each

Definitions

  • the present invention further relates to an operating program comprising machine code, the processing of which is effected by an automation device for a cooling line, that the automation device carries out such an operating method. Furthermore, the present invention relates to a data carrier, on which such an operating program is stored in machine-readable form, and an automation device for a cooling line, which is programmed with such an operating program, so that it executes such an operating method during execution of the operating program. Finally, the present invention relates to a corresponding cooling section.
  • valve-specific characteristics include in particular a switch-on delay and a switch-off delay.
  • the valve-specific characteristics change during operation.
  • the delays may be influenced by wear, for example.
  • a valve-related average flow rate often also varies. This variation can be caused by soiling, for example.
  • valve-specific characteristics often no longer coincide with the parameterized characteristics, on the basis of which the valve-specific opening times and the valve-specific closing times are determined in a cooling-gap model. Therefore, there is a suboptimal loading of the rolling stock with the coolant, which at the same time causes the rolling stock not to have the desired product properties as a result.
  • the object of the present invention is to provide ways in which the valve-specific characteristics can be determined and taken into account in a simple and reproducible manner.
  • the object is achieved by an operating method having the features of claim 1, an operating program having the features of claim 11 and a data carrier on which such an operating program is stored. Furthermore, the object is achieved by an automation device for a cooling section, which is programmed with such an operating program. Finally, the problem is solved by a corresponding cooling section.
  • Advantageous embodiments of the operating method are the subject of the dependent claims 2 to 10.
  • the automation device takes into account the respective valve-specific characteristic when determining the valve-specific opening times and the valve-specific closing times.
  • the respective valve-specific characteristic can, as already mentioned, in particular comprise a switch-on delay and / or a switch-off delay.
  • the automation device For determining the switch-on delay of one of the valves, the automation device preferably issues an opening command to the respective valve when the respective valve is closed at a first activation time. Furthermore, in this case, the flow of coolant flowing in the main pipe is detected. The switch-on delay is determined in this case based on the first actuation time and the detected coolant flow rate.
  • the automation device can output a closing command in an analogous manner with the respective valve open to the respective valve at a second activation time.
  • the flow of coolant flowing in the main line is also detected.
  • the switch-off delay is determined in this case on the basis of the second activation time and the detected coolant flow rate.
  • the respective valve-specific characteristic may further comprise an average amount of coolant flow which flows through the respective valve when the respective valve is open. To determine the mean coolant flow, two alternative approaches are possible.
  • an opening period it is possible to repeatedly detect the flow of coolant through the main line and to determine the mean flow of coolant through the average of the detected flows of coolant.
  • a quantity of coolant that has flowed through the main line at the beginning and at the end of an opening period can be detected, and the average amount of coolant Coolant flow rate can be determined by forming the difference of the detected amounts of refrigerant and dividing the difference by the opening period.
  • a calibration pressure prevailing in one of the supply lines is also detected in the calibration operation.
  • the automation device detects in this embodiment in normal operation a ruling in this supply line normal pressure.
  • the automation device can also take into account the calibration pressure and the normal pressure when determining the valve-specific opening times and the valve-specific closing times in addition to the respective valve-specific characteristic.
  • the supply line whose pressure is detected must not be identical to the main line, whose flow of refrigerant is detected (although this is of course possible). It is sufficient that the supply lines are communicatively connected with each other when they are different supply lines.
  • the main line has a measuring section which has at least two individual sections connected in parallel in terms of flow technology. Of the individual sections, one has a large and the other a small cross-section.
  • the measuring arrangement has a flow sensor arranged in the individual section with the small cross section for detecting the flow of coolant flow flowing in this individual section.
  • a main valve is arranged at least in the single section with the large cross section. At the beginning of the normal operation of the cooling section, the main valve is opened. The main valve is kept open during normal operation of the cooling section.
  • the main valve is at least temporarily closed so that the flow of coolant flow flowing in the main line when the main valve is closed corresponds to the amount of coolant flow flowing in the single section with the small cross section.
  • the flowing coolant flow rates can be detected relatively accurately in a simple manner.
  • the opening and closing of the main valve by means of a corresponding control by the automation device takes place.
  • the calibration operation is performed automatically by the automation device.
  • a cooling section 1 has a multiplicity of coolant outlets 2.
  • a rolling stock 3 which passes through the cooling section 1, can be acted upon by a coolant 4.
  • the coolant 4 is usually water or at least contains water as its main component.
  • the coolant outlets 2 are supplied with the coolant 4 via supply lines 5, 6.
  • the supply lines 5, 6 comprise branch lines 5 and a main line 6.
  • the branch lines 5 are via the main line 6 with the coolant 4 supplied.
  • the main line 6 is in this case the stubs 5 together.
  • valves 7 are arranged, which are individually openable and closable.
  • the supply of the coolant outlets 2 with the coolant 4 Stich effetively be produced and interruptible.
  • FIG. 1 are - purely by way of example - via two of the valves 7 three coolant outlets 2 is actuated via one of the valves 7 two of the coolant outlets 2 and one of the valves 7 one of the coolant outlets 2.
  • this embodiment is purely exemplary.
  • the same number of coolant outlets 2 is actuated via each of the valves 7, that is, for example, always two or three coolant outlets 2.
  • the cooling section 1 has an automation device 8, which determines the operation of the cooling section 1.
  • the automation device 8 is usually software programmable.
  • the operation of the automation device 8 is determined in this case by an operating program 9, the automation device 8 via a computer network (not shown, for example, the Internet) or a mobile data carrier 10 (for example, a CD-ROM) is supplied.
  • the operating program 9 is hereby optionally stored on the mobile data carrier 10 in machine-readable form. By supplying the operating program 9 to the automation device 8, the automation device 8 is programmed with the operating program 9.
  • the operating program 9 comprises machine code 11, the execution of which by the automation device 8 causes the automation device 8 to carry out an operating method, which is described below in connection with FIG FIG. 2 and the further FIG is explained in detail.
  • the automation device 8 checks in a step S1 whether it should accept a calibration operation. If this is the case, the automation device 8 leads a step S2. Otherwise, the automation device 8 is in normal operation. In this case, it performs a step S3.
  • a respective valve-specific characteristic is determined at least for some of the valves 7 (usually for all valves 7).
  • the determination of the valve-specific characteristics is preferably carried out automatically by the automation device 8 here. However, it could also be done manually, at least in part.
  • the determination of the valve-specific characteristic comprises - per valve 7 whose characteristic is to be determined - the opening and closing of the respective valve 7 and (as a result) the detection of a temporal course of the coolant flow Q in the respective supply line 5, 6 effected thereby.
  • step S3 the automation device 8 determines (for example in the context of a cooling line model) valve-specific opening times and valve-specific closing times for each valve 7. It takes into account in determining the valve-specific opening times and the valve-specific closing times the respective valve-specific characteristics of the respective valve 7. Furthermore opens and closes the automation device 8, the valves 7 to the respective valve-specific opening times and closing times. In this way it is achieved that the rolling stock 3 is acted upon in accordance with a desired coolant flow rate with the coolant 4.
  • step S3 is known as such. Further explanations to step S3 are therefore omitted.
  • the respective valve-specific characteristic of a valve 7 comprises a switch-on delay T1 and a switch-off delay T2.
  • the Step S2 of FIG. 2 For example, include a procedure as described below in connection with FIG. 3 is explained in more detail.
  • the automation device 8 In order to determine the switch-on delay T1 of one of the valves 7, the automation device 8 outputs an opening command in a step S11 when the respective valve 7 is closed to the respective valve 7 at a first activation time t1.
  • a step S12 the automation device 8 checks whether the coolant flow Q flowing in the corresponding supply line 5, 6 has already reached an upper threshold value SW1. The step S12 is executed until the refrigerant flow rate Q rises above the upper threshold value SW1. Then, it goes to a step S13, in which the automation device 8 detects the corresponding time t2, hereinafter called opening time t2.
  • the automation device 8 determines the switch-on delay T1 on the basis of the first actuation time t1 and the opening time t2. In the simplest case, it determines the switch-on delay T1 by forming the difference between the opening time t2 and the first activation time t1.
  • step S15 the automation device 8 then outputs a closing command when the respective valve 7 is open to the respective valve 7 at a second activation time t3.
  • step S16 the automation device 8 checks whether the coolant flow Q is smaller than a lower threshold SW2. Step S16 is executed until the refrigerant flow Q decreases below the lower threshold SW2. Then the evaluation device 8 proceeds to a step S17.
  • the automation device 8 detects the time t4 at which the coolant flow rate Q has dropped below the lower threshold value SW2.
  • the time t4 is called closing time t4 below.
  • the automation device 8 determines the switch-off delay T2 based on the second drive time t3 and the closing time t4.
  • the evaluation device 8 determines the switch-off delay T2 by forming the difference between the closing time t4 and the second triggering time t3.
  • the respective valve-specific characteristic may comprise an average coolant flow QM which flows through the respective valve 7 when the respective valve 7 is open.
  • the step S2 of FIG. 2 alternatively or in addition to the embodiment of FIG. 3 according to the FIG. 5 and 6 be designed.
  • the embodiments according to the FIG. 5 and 6 Here are alternatives.
  • step S21 the automation device 8 opens one of the valves 7 in a step S21. Furthermore, it sets an index n and a summation value QS for the coolant flow Q to zero in step S21.
  • step S22 the automation device 8 then carries out a step S22, in which it waits for a delay time.
  • step S22 is not mandatory, but only optional.
  • step S23 the automation device 8 detects the currently flowing coolant flow Q.
  • the added coolant flow Q added them - also in step S23 - to the previous total value QS added. Furthermore, the automation device 8 increases the index n in step S23.
  • step S24 the automation device 8 checks whether the index n has already reached a final value N. If this is not the case, the automation device 8 returns to step S23. Otherwise, it goes to a step S25.
  • step S25 the automation device 8 determines the mean coolant flow QM as the value entering the valve-specific characteristic by dividing the sum value QS by the final value N. Furthermore, the automation device 8 closes the respective valve 7 in step S25.
  • the procedure of FIG. 5 can with the determination of the on-delay T1 and the off-delay T2 of FIG. 3 be combined. Such a combination is in particular from FIG. 4 can be seen, in which the times at which each of the coolant flow Q is detected in the context of step S23, are also marked.
  • the automation device 8 in a step S31 opens the respective valve 7 and then - at least preferably - waits for a delay time. Then, in a step S32, it acquires a count Z of a coolant amount counter at a start time t5 and starts a timer.
  • step S33 the automation device 8 waits for the timer to expire and, at an end time t6, again detects the counter reading Z.
  • a step S34 the automation device 8 closes the corresponding valve 7.
  • the automation device 8 forms the difference ⁇ Z of the counter readings Z and divides the difference ⁇ Z by the time duration T at which the timer has expired, ie the difference between the end time t6 and start time t5.
  • FIG. 6 The design of FIG. 6 can be combined with the determination of the switch-on delay T1 and the switch-off delay T2. This is especially in FIG. 7 shown.
  • Steps S41 and S42 are the core procedures of FIG. 3 . 5 and 6 upstream, the steps S43 and S44 arranged downstream.
  • step S41 the automation device 8 closes all the valves 7.
  • step S42 the automation device 8 selects one of the valves 7.
  • step S43 the automation device 8 checks whether it has the respective core procedure of the FIG. 3 . 5 and 6 already executed for all valves 7, for which they should carry out the corresponding core procedure. If this is not the case, the automation device 8 selects the next relevant valve 7 in step S44 and then - for this newly selected valve 7 - goes back to the first step (S11, S21 or S31) of the respective core procedure.
  • the main pipe 6 has a large cross section, for example, a pipe diameter of 1,000 mm. However, the given value of 1.000 mm is only an example. In individual cases, the pipe diameter (or more generally the cross section) of the main line 6 can also be larger or smaller. If only one of the valves 7 is opened in such an embodiment, the flow velocity of the coolant 4 in the main line 6 is very low.
  • the main line 6 preferably has a measuring section 13 which has at least two individual sections 14, 15 which are connected in parallel in terms of flow technology.
  • the single section 14 - hereinafter referred to as main section 14 - has a large cross section, for example, the normal cross section of the remaining main line 6.
  • the other single section 15 - hereinafter called additional section 15 - has a small cross section. For example, it may have a tube diameter of 250, 200 or 150 mm. Again, the numerical values are to be understood as purely exemplary.
  • the cross section could also be larger or smaller.
  • the measuring arrangement 12 for detecting the coolant flow Q flowing in the main line 6 has a flow sensor 12a.
  • the flow sensor 12 a is arranged in the additional section 15. It detects the coolant flow Q flowing in the additional section 15.
  • a main valve 16 is arranged in the main section 14.
  • the main valve 16 When the main valve 16 is closed, therefore, the flowing in the main line 6 coolant flow Q corresponds to the flowing in the additional portion 15 coolant flow Q. This is a simple way a much more accurate detection of the coolant flow rate Q possible without having to accept impairments in normal operation.
  • valves 7 it may be useful to simultaneously control whole groups of valves 7 in the calibration mode. In such cases, it may be useful or necessary to direct the coolant 4 through the main section 14. In such cases, a further flow sensor 12b must also be arranged in the main section 14. Furthermore, in this case, an additional valve 16 'should be arranged in the additional section 15 in order to be able to block the additional section 15. Otherwise, several measured values would have to be recorded in parallel.
  • each individual section 14, 15, 15x is assigned a respective flow sensor 12a, 12b, 12x and one valve 16, 16 ', 16x.
  • each valve 16, 16 ', 16x By correspondingly opening and closing the valves 16, 16 ', 16x, it can be achieved in this case that the coolant flow Q flowing in the main line 6 must flow through a single one of the individual sections 14, 15, 15x at a certain point in time, so that there detected coolant flow Q corresponds to the total amount of coolant flow Q flowing.
  • the main valve 16 is preferably closed at the beginning of the calibration and at the end of the calibration (or - correspondingly - at the beginning of normal operation) opened again. In normal operation, the main valve 16 is kept open. Optionally, it may also be necessary to temporarily open the main valve 16 during the calibration operation. However, at least during the entire normal operation, the main valve 16 should be kept open.
  • FIG. 8 This represents a modification of FIG. 2 It also contains the steps S1 to S3, which, however, are supplemented by steps S51 to S52.
  • step S51 the automation device 8 closes the main valve 16.
  • step S52 the automation device 8 opens the main valve 16. If in the main line 6 more valves 16 ', 16x are present, these valves 16', 16x are controlled in an analogous manner.
  • a pressure sensor 17 is arranged in one of the supply lines 5, 6 - preferably the main line 6 - .
  • the pressure sensor 17 detects the pressure in the respective supply line 5, 6.
  • the pressure is hereinafter referred to by the reference numerals p and p ', wherein the reference numeral p for the pressure p in normal operation (hereinafter normal pressure p called) and the reference p' for the pressure p 'in the calibration (hereinafter calibration pressure p' called) is used ,
  • step S61 the Automation device 8 during the calibration in the respective supply line 5, 6 pending calibration pressure.
  • step S71 the automation device 8 detects the normal pressure p present during normal operation.
  • step S72 is similar to the step S3 of FIG. 2 .
  • the automation device 8 also takes into account the calibration pressure p 'and the normal pressure p when determining the valve-specific opening times and the valve-specific closing times.
  • the automation device 8 automatically assumes the valve-specific characteristics which it determines in the calibration mode as new values. Preferably, however, the automation device 8 displays the determined characteristics via a viewing device to an operator. In this case, the operator can specify to the automation device 8 whether to adopt or reject the values. Furthermore, the operator can optionally modify the determined characteristics.
  • the automation device 8 preferably checks the determined valve-specific characteristics for compliance with tolerance ranges. If the tolerance ranges are exceeded, an alarm message is issued.
  • the threshold values SW1, SW2 can be predefined for the automation device 8. Alternatively, they can be parameterized or specified by the operator. Furthermore, it is possible for the determination of the opening time t2 and the closing time t4, instead of the coolant flow rate Q to take its time derivative and to check at what time the change in the flow of coolant Q falls below a threshold in terms of amount.
  • valve-specific characteristics not only for individual valves 7, but also for entire valve groups (for example, every other valve 7, every third valve 7, etc.).
  • the further flow sensor 12b may be required, in the additional section 15, the additional valve 16 '.
  • the reliability of the calibration can be increased if the automation device 8 in addition to the detected coolant flow Q feedback from the valves 7, 16, 16 'are supplied. On the basis of these feedbacks, it can be recognized, for example, that the respective valve 7, 16, 16 'is in one of its end positions (completely open or completely closed).
  • the automation device 8 also preferably carries out plausibility checks and optionally issues alarm messages to the operator.
  • the operator of the automation device 8 can specify with respect to which of the valves 7 the determination of the valve-specific characteristic is to be carried out. For example, the operator can mark individual valves 7 or valve groups as defective and thus hide from the determination of the valve-specific characteristic or, conversely, request the determination of the respective valve-specific characteristics with respect to individual valves 7 or valve groups.
  • the automation device 8 automatically determines the valve-specific characteristics in the calibration operation.
  • the automation device 8 it is possible for the automation device 8 to actuate the valves 7 (and possibly also the valves 16, 16 ', 16x) and to acquire the relevant measured values Q, t2, t4, but to determine the valve-specific characteristics themselves Operator is done.
  • the time profile of the coolant flow Q could be detected and output to the operator. For example, a record could be made on paper.
  • the operator would have to make both the determination of the relevant times t2, t4 and the comparison with the threshold values SW1, SW2 and also read the coolant flow rates Q itself. Also, in this case, the determination of the valve-specific characteristics would not be automated by the automation device 8. Furthermore, it is possible that even the control of the valves 7 (and possibly also of the other valves 16, 16 ', 16x) is not fully automated, but is always done only when the automation device 8 is given by the operator a corresponding control command.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Claims (14)

  1. Procédé pour faire fonctionner une section (1) de refroidissement,
    - dans lequel la section (1) de refroidissement a une pluralité de sorties (2) pour du fluide de refroidissement au moyen desquelles, lorsque la section (1) de refroidissement est en fonctionnement normal, un produit (3) de laminage passant dans la zone (1) de refroidissement peut être alimenté en un fluide (4) de refroidissement,
    - dans lequel on alimente les sorties (2) pour du fluide de refroidissement en le fluide (4) de refroidissement par des conduits (5, 6) d'alimentation,
    - dans lequel les conduits (5, 6) d'alimentation comprennent des conduits (5) de dérivation, dans lesquels est montée respectivement une vanne (7),
    - dans lequel les vannes (7) peuvent être ouvertes et fermées individuellement, de manière à pouvoir ménager et interrompre à la manière d'un conduit de dérivation l'alimentation en le fluide (4) de refroidissement des sorties (2) pour le fluide de refroidissement au moyen des vannes (7),
    - dans lequel les conduits (5) de dérivation sont alimentés en le fluide (4) de refroidissement par un conduit (6) principal commun aux conduits (5) de dérivation,
    - dans lequel un dispositif (8) d'automatisation de la section (1) de refroidissement ouvre, lorsque la section (1) de refroidissement est en fonctionnement normal, les vannes (7) à des instants d'ouverture spécifiques à une vanne et les ferme à des instants de fermeture spécifiques à la vanne pour alimenter en le fluide (4) de refroidissement le produit (3) à laminer suivant une courbe de consigne de quantité de fluide de refroidissement,
    - dans lequel, dans un fonctionnement d'étalonnage de la section (1) de refroidissement, au moins pour de nombreuses vannes (7), une caractéristique respective spécifique aux vannes est déterminée par une ouverture et une fermeture de la vanne (7) respective et par une détection de la courbe dans le temps ainsi provoquée du débit (Q) de fluide de refroidissement au moyen d'un dispositif (12) de mesure monté dans le conduit (6) principal, caractérisé en ce que
    - le dispositif (8) d'automatisation tient compte, lors de la détermination des instants d'ouverture spécifiques à une vanne et des instants de fermeture spécifiques à une vanne, de la caractéristique respective spécifique à une vanne.
  2. Procédé suivant la revendication 1,
    caractérisé en ce que la caractéristique respective spécifique à une vanne comprend un retard (T1) à la mise en service et/ou un retard (T2) à la mise hors service.
  3. Procédé suivant la revendication 2,
    caractérisé en ce que, pour la détermination du retard (T1) de mise en service de l'une des vannes (7), le dispositif (8) d'automatisation émet, lorsque la vanne (7) respective est fermée, vers l'autre vanne (7) à un premier instant (T1) de commande, une instruction d'ouverture, en ce que le débit (Q) de fluide de refroidissement passant dans le conduit (6) principal est détecté et en ce que l'on détermine le retard (T1) de mise en service au moyen du premier instant (T1)de commande et du débit (Q) de fluide de refroidissement détecté.
  4. Procédé suivant la revendication 2 ou 3,
    caractérisé en ce que, pour la détermination du retard (T2) de mise hors service de l'une des vannes (7), le dispositif (8) d'automatisation émet, lorsque la vanne (7) respective est ouverte, vers l'autre vanne (7) à un deuxième instant (T3) de commande, une instruction de fermeture, en ce que le débit (Q) de fluide de refroidissement passant dans le conduit (6) principal est détecté et en ce que le retard (T2) de mise hors service est déterminé au moyen du deuxième instant (T3) de commande et du débit (Q) de fluide de refroidissement détecté.
  5. Procédé suivant l'une des revendications précédentes,
    caractérisé en ce que la caractéristique respective spécifique à une vanne comprend un débit (QM) moyen de fluide de refroidissement, qui passe lorsque la vanne (7) respective est ouverte, dans l'autre vanne (7).
  6. Procédé suivant la revendication 5,
    caractérisé en ce que, pour la détermination du débit (QM) moyen de fluide de refroidissement de l'une des vannes (7), on détecte pendant un laps de temps (T) d'ouverture, de manière répétée, le débit (Q) de fluide de refroidissement passant dans le conduit (6) principal et en ce que l'on détermine le débit (QM) moyen de fluide de refroidissement en formant la moyenne des débits (Q) de fluide de refroidissement détectés.
  7. Procédé suivant la revendication 5,
    caractérisé en ce que, pour la détermination du débit (QM) moyen de fluide de refroidissement de l'une des vannes (7), on détecte une quantité (Z) de fluide de refroidissement, qui est passé dans le conduit (6) principal au début et à la fin d'un laps de temps (T) d'ouverture et en ce que l'on détermine le débit (QM) moyen de fluide de refroidissement en formant la différence (δZ) des quantités (Z) de fluide de refroidissement détectées et en divisant la différence (δZ) par le laps de temps (T) d'ouverture.
  8. Procédé suivant la revendication 5, 6 ou 7,
    caractérisé en ce que, en fonctionnement d'étalonnage de la section (1) de refroidissement, on détecte en plus du débit (Q) de fluide de refroidissement également une pression (P') d'étalonnage régnant dans l'un des conduits (6) d'alimentation, en ce que le dispositif (8) d'automatisation relève, lorsque la section (1) de refroidissement est en fonctionnement normal, une pression (P) normale régnant dans ce conduit (6) d'alimentation et en ce que le dispositif (6) d'automatisation tient compte, lors de la détermination des instants d'ouverture spécifiques à une vanne et des instants de fermeture spécifiques à une vanne, outre de la caractéristique respective spécifique à une vanne, également de la pression (P') d'étalonnage et de la pression (P) normale.
  9. Procédé suivant l'une des revendications précédentes, caractérisé
    - en ce que le conduit (6) principal comporte un tronçon (13) de mesure,
    - en ce que le tronçon (13) de mesure comporte au moins deux tronçons (14, 15) individuels montés en parallèle fluidiquement, dont l'un a une section transversale grande et l'autre une section transversale petite,
    - en ce que le dispositif (12) de mesure a un capteur (12a) de débit monté dans le tronçon (15) individuel ayant la section transversale petite pour la détection du débit (Q) de fluide de refroidissement passant dans le tronçon (15) individuel ayant la section transversale petite,
    - en ce qu'une vanne (16) principale est montée au moins dans le tronçon (14) individuel ayant la grande section transversale et
    - en ce que - de préférence par une commande adéquate par le dispositif (8) d'automatisation - la vanne (16) principale est ouverte au début du fonctionnement normal de la section (1) de refroidissement et maintenue ouverte en fonctionnement normal de la section (1) de refroidissement et est fermée au moins de temps en temps en fonctionnement d'étalonnage de la section (1) de refroidissement, de sorte que le débit (Q) de fluide de refroidissement passant dans le conduit (6) principal corresponde, lorsque la vanne (16) principale est fermée, au débit (Q) de fluide de refroidissement passant dans le tronçon (15) individuel ayant la petite section transversale.
  10. Procédé suivant l'une des revendications précédentes, caractérisé en ce que le fonctionnement d'étalonnage est effectué d'une manière automatisée par le dispositif (8) d'automatisation.
  11. Programme de fonctionnement, qui comprend un code (11) machine, dont le déroulement par un dispositif (8) d'automatisation d'une section (1) de refroidissement fait que le dispositif (8) d'automatisation exécute un procédé de fonctionnement suivant la revendication 10.
  12. Support de données, sur lequel un programme (9) de fonctionnement suivant la revendication 11 est mémorisé sous une forme pouvant être exécutée par une machine.
  13. Dispositif d'automatisation d'une section (1) de refroidissement, dans lequel le dispositif d'automatisation est programmé par un programme (9) de fonctionnement suivant la revendication 11, de manière à ce qu'il exécute, lors du déroulement du programme (9) de fonctionnement, un procédé de fonctionnement suivant la revendication 10.
  14. Section de refroidissement,
    - dans laquelle la section de refroidissement a une pluralité de sorties (2) de fluide de refroidissement, au moyen desquelles, lorsque la section de refroidissement est en fonctionnement normal, un produit (3) à laminer passant dans la section de refroidissement peut être alimenté en un fluide (4) de refroidissement,
    - dans laquelle les sorties (2) pour du fluide de refroidissement peuvent être alimentées en le fluide (4) de refroidissement par des conduits (5, 6) d'alimentation,
    - dans laquelle les conduits (5, 6) d'alimentation comprennent des conduits (5) de dérivation, dans lesquels est montée respectivement une vanne (7),
    - dans laquelle les vannes (7) peuvent être ouvertes et fermées individuellement, de manière à pouvoir ménager et interrompre à la manière d'un conduit de dérivation l'alimentation en le fluide (4) de refroidissement des sorties (2) pour le fluide de refroidissement au moyen des vannes (7),
    - dans laquelle les conduits (5) de dérivation peuvent être alimentés en le fluide (4) de refroidissement par un conduit (6) principal commun aux conduits (5) de dérivation,
    - dans laquelle un dispositif (8) d'automatisation de la section de refroidissement est constitué suivant la revendication 13.
EP20080803522 2007-09-27 2008-09-02 Procédé de fonctionnement d'un circuit de refroidissement à saisie centralisée de caractéristiques de vannes et objets correspondants Active EP2203263B1 (fr)

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PCT/EP2008/061551 WO2009043668A1 (fr) 2007-09-27 2008-09-02 Procédé de fonctionnement d'un circuit de refroidissement à saisie centralisée de caractéristiques de vannes et objets correspondants

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RU2010116413A (ru) 2011-11-10
CN101952059A (zh) 2011-01-19
PL2203263T3 (pl) 2013-04-30
US20100312399A1 (en) 2010-12-09
US8463446B2 (en) 2013-06-11
WO2009043668A1 (fr) 2009-04-09
CN101952059B (zh) 2013-06-19
BRPI0817573A2 (pt) 2015-08-18
DE102007046279A1 (de) 2009-04-09
WO2009043668A8 (fr) 2009-05-28
RU2479369C2 (ru) 2013-04-20
UA99306C2 (ru) 2012-08-10

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