EP3808466A1 - Dispositif de refroidissement à rayonnement de refroidissement pourvu de section transversale creuse - Google Patents

Dispositif de refroidissement à rayonnement de refroidissement pourvu de section transversale creuse Download PDF

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Publication number
EP3808466A1
EP3808466A1 EP19203498.1A EP19203498A EP3808466A1 EP 3808466 A1 EP3808466 A1 EP 3808466A1 EP 19203498 A EP19203498 A EP 19203498A EP 3808466 A1 EP3808466 A1 EP 3808466A1
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EP
European Patent Office
Prior art keywords
cooling
rolling stock
cross
coolant outlets
full
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.)
Withdrawn
Application number
EP19203498.1A
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German (de)
English (en)
Inventor
Thomas Matschullat
Klaus Weinzierl
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.)
Primetals Technologies Germany GmbH
Original Assignee
Primetals Technologies Germany 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 Primetals Technologies Germany GmbH filed Critical Primetals Technologies Germany GmbH
Priority to EP19203498.1A priority Critical patent/EP3808466A1/fr
Priority to CN202080072166.8A priority patent/CN114555253B/zh
Priority to PCT/EP2020/078917 priority patent/WO2021074233A1/fr
Priority to EP20788823.1A priority patent/EP4045204B1/fr
Priority to US17/766,686 priority patent/US20240075511A1/en
Publication of EP3808466A1 publication Critical patent/EP3808466A1/fr
Withdrawn legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling

Definitions

  • metal in the context of the present invention is intended to include elemental metals such as aluminum or copper.
  • metal but also include common metal alloys.
  • the rolling stock can consist in particular of steel, aluminum or an aluminum alloy or, in individual cases, also of brass.
  • the flat, elongated rolling stock can alternatively be designed as a strip or as a plate.
  • the rolling stock is rolled from an initial thickness to a final thickness.
  • the finishing train usually has a plurality of roll stands, which are arranged one behind the other, so that the rolling stock passes through them with a uniform transport direction. In individual cases, however, reversing rolling can also take place.
  • the rolling stock is cooled to a target temperature. An attempt is often made to set a given temperature profile over time exactly.
  • a cooling device can be arranged upstream of the finishing train in order to be able to set the temperature of a strip entering the finishing train that has not yet been rolled. So-called inter-stand cooling systems can also be arranged between the roll stands of the finishing train.
  • hot rolling mills - be it in the form of insulated rolling mills or in the form of casting and rolling plants - are usually followed by a cooling section.
  • the cooling section can, depending on the situation of the individual case, be designed as a laminar cooling section and / or as cooling with a so-called water curtain and / or as spray water cooling and / or as intensive cooling.
  • the first cooling beam has a number of coolant outlets which, viewed in the width direction of the rolling stock, are arranged at a predetermined distance from one another, mostly in a fixed grid of, for example, 5 cm.
  • the water is applied to the flat rolled material from above or below by means of the first cooling bar.
  • a plurality of cooling bars are arranged both above and below the rolling stock, viewed in the transport direction of the flat rolling stock.
  • the coolant outlets can be designed in various ways.
  • Fan nozzles apply the water to the flat rolling stock in a jet which, as seen from the respective spray nozzle, has a noteworthy opening angle in at least one direction, often 50 ° and more.
  • fan nozzles When using fan nozzles, a clearly uneven cooling effect often results across the width of the flat rolled stock.
  • Spray nozzles atomize the water. They therefore have a relatively low cooling effect. In addition, this cooling effect is also uneven when viewed across the width of the flat rolling stock.
  • the coolant outlets are usually designed as full jet nozzles. This applies both when the cooling device is designed as a laminar cooling device and when the cooling device is designed as intensive cooling.
  • full jet nozzles the water emerges in the form of a compact jet (called full jet or impact jet) from the respective full jet nozzle.
  • the full jet has only a small or no opening angle.
  • Full jet nozzles are nozzles from which the water emerges in a jet, which does not widen or at least only slightly.
  • a jet opening angle exhibited by the water jet emerging from the respective full jet nozzle is usually a maximum of 5 °, often only 3 ° or only 2 ° or even an even lower value.
  • full jet nozzles Even with full jet nozzles, the cooling of the flat rolling stock is higher in the area in which the jets strike the flat rolling stock than in the areas in between.
  • full jet nozzles also results in uneven strip cooling.
  • full jet nozzles In the overall assessment, however, full jet nozzles have the most advantages and the fewest disadvantages compared to the other types of nozzles. As a rule, full jet nozzles are therefore used in cooling systems.
  • the material properties of the flat rolled stock are influenced to a considerable extent by the time course of the cooling in the cooling device, in particular in a cooling section downstream of the finishing train. If the cooling is uneven across the width of the rolled stock, uneven material properties also result. In some cases these fluctuations can be accepted. In other cases they are annoying. Furthermore, the uneven cooling can also cause flatness errors.
  • a treatment line for a flat, elongated hot rolling stock made of metal which has a roughing train and a finishing train for rolling the rolling stock.
  • a cooling section is arranged between the roughing train and the finishing train.
  • the cooling section has a single cooling beam which, viewed in the width direction of the rolling stock, extends completely over the rolling stock.
  • the cooling beam can have several application devices facing the rolling stock, which in turn each have several coolant outlets.
  • the application devices can be positioned independently of one another, viewed in the width direction of the rolling stock.
  • the coolant outlets have different nozzle shapes.
  • One of the nozzle shapes has a circumferential strip in the manner of the edges of a rectangle.
  • the object of the present invention is to create possibilities by means of which improved cooling of the flat rolling stock after rolling in the finishing train can be achieved.
  • a treatment line of the type mentioned at the outset is designed in that the respective convex envelope contains at least one area that is not contained in the respective full jet itself.
  • the first cooling bar it is possible for the first cooling bar to be designed as an intensive cooling bar. In this case, the water emerges from the first coolant outlets of the first cooling bar at a pressure of at least 1 bar, in particular at a pressure between 1.5 bar and 4 bar. Alternatively, it is possible for the first cooling bar to be designed as a laminar cooling bar. In this case, the water emerges from the first coolant outlets of the first cooling bar with a pressure of a maximum of 0.5 bar, in particular with a pressure that is between 0.1 bar and 0.4 bar.
  • the cross-sections of the full jets are each closed in a ring shape.
  • cross-sections of the full jets thus each surround a region which, viewed in the cross-sectional plane, is completely enclosed by the cross-section of the respective full jet. This area is part of the convex envelope of the respective full jet, but not part of the cross section of the respective full jet itself.
  • the cross sections of the full jets are each formed as part of a respective circular ring.
  • the respective circular ring can in particular extend over a respective angle of at least 90 ° and a maximum of 270 °, usually about 150 ° to 210 °.
  • the cross-sections of the full jets are each V-shaped or zigzag-shaped.
  • Zigzag shapes are, for example, an N shape or a W shape. The fewer kink points the cross-section has, the more preferably the respective shape is realized.
  • the respective convex envelope has a maximum extent as seen in the cross-sectional plane.
  • the respective cross-section has a maximum effective width as seen in the cross-sectional plane.
  • the ratio of the maximum extent to the maximum effective width is preferably greater than 3: 1, in particular greater than 5: 1.
  • the cooling device comprises - in addition to the first cooling beam - at least one second cooling beam.
  • the second cooling bars extend in this case - like the first cooling bar - viewed in the width direction of the rolling stock completely over the rolling stock.
  • They also have a plurality of coolant outlets towards the rolling stock, by means of which water is applied to the rolling stock.
  • the second coolant outlets are fixedly arranged in the second cooling beam in at least one row extending in the width direction of the rolling stock. Within the respective row, the second coolant outlets are each at a predetermined distance from one another.
  • the second cooling beams are, however, arranged behind the first cooling beam as seen in the direction of transport of the rolling stock. The rolling stock is therefore first cooled by means of the first cooling bar, then by means of the second cooling bar.
  • the second coolant outlets of at least one of the second cooling bars are preferably arranged between the coolant outlets of the first cooling bar, viewed in the width direction of the rolling stock.
  • This second cooling beam can in particular be that cooling beam which, as seen in the transport direction of the rolling stock, is immediately downstream of the first cooling beam.
  • the second coolant outlets of at least one of the second cooling bars are designed as full jet nozzles, from which a full jet with a respective cross section emerges during operation.
  • the cross sections of these full jets can each have a convex envelope and this respective convex envelope can furthermore contain at least one area that is not contained in the respective full jet itself.
  • the second coolant outlets of at least one of the second cooling bars are designed as full jet nozzles from which a full jet with a respective cross section emerges during operation, the cross sections of these full jets each having a convex envelope, but with this respective convex envelope corresponds to the cross-section of the respective full jet.
  • the full jet nozzles of the corresponding second cooling bar are designed in a conventional manner.
  • the second coolant outlets of at least one of the second cooling bars are designed as fan nozzles or spray nozzles.
  • the object of the invention is also achieved by a method for the finish rolling and cooling of a flat, elongated rolled stock made of metal in a treatment line according to claim 13, wherein the rolled stock is hot rolled in the finishing train of the treatment line, and the at least partially hot rolled rolled stock is cooled in a cooling device of the treatment line is, wherein the rolling stock is cooled in its width direction by several full jets through water, several, preferably all, full jets each contain a convex shell with at least one area that is not contained in the respective full jet itself.
  • the rolling stock is wound up into a coil after cooling.
  • a treatment line has a finishing train 1.
  • the finishing train 1 has several roll stands 2, often between three and seven roll stands 2, in particular four or six roll stands 2, for example five roll stands 2 FIGS. 1 and 2 only the first and the last roll stand 2 of the finishing train 1.
  • the roll stands 2 are usually one behind the other arranged so that they are traversed by a flat, elongated, hot rolling stock 3 made of metal in a uniform transport direction x. In individual cases, however, reversing rolling can also take place.
  • the rolling stock 2 can consist of steel or aluminum, for example. Alternatively, it can be a strip or a heavy plate.
  • the rolling stock 3 is rolled from an initial thickness to a final thickness.
  • the rolling stock 3 therefore enters the first roll stand 2 of the finishing train 1 with the initial thickness and exits the last roll stand 2 of the finishing train 1 with the final thickness.
  • the rolling stock 3 has a final rolling temperature as it leaves the last roll stand 2 of the finishing train 1.
  • the final rolling temperature can be between 750 ° C. and 1,000 ° C. for a rolled stock 3 made of steel, for example.
  • finishing train 1 can be preceded by a continuous caster. If required, a roughing train or a roughing stand can be arranged between the finishing train 1 and the continuous caster. It is also possible for a furnace to be arranged upstream of the finishing train 1, in which a pre-strip is heated to rolling temperature. Other configurations are also possible.
  • the treatment line also has a cooling device 4.
  • the cooling device 4 is designed as a cooling section which is arranged downstream of the finishing train 1.
  • the rolling stock 3 is cooled to a target temperature based on the final rolling temperature.
  • the target temperature can be in the range between 150 ° C. and 800 ° C. for a rolled stock 3 made of steel, for example.
  • An attempt is often made to set a given temperature profile over time exactly.
  • the cooling device 4 could also be arranged inside the finishing train 1, that is to say as an intermediate stand cooling be formed, which is arranged between two roll stands 2 of the finishing train.
  • the cooling device 4 could also be arranged upstream of the finishing train 1, for example in the form of pre-strip cooling between a roughing train or a roughing stand and the finishing train 1.
  • a reel in the case of a strip, for example, a reel can be arranged downstream of the cooling section.
  • the cooling section can be followed by a shelf.
  • the devices downstream of the cooling section are of subordinate importance and are not the subject of the present invention.
  • the cooling section has rollers 5 by means of which the rolling stock 3 is conveyed through the cooling section in the transport direction x.
  • the roles 5 are only in FIG 1 shown. In FIG 1 again, only some of the rollers 5 are provided with their reference numerals. The roles 5 as such are, however, of subordinate importance in the context of the present invention and are therefore not dealt with further.
  • the cooling device 4 To cool the rolling stock 3, the cooling device 4 has a first cooling beam 6.
  • the first cooling beam 6 extends according to FIG 2 Viewed in the width direction y of the rolling stock 3 completely over the rolling stock 3. This applies regardless of the specific width of the rolling stock 3.
  • the first cooling beam 6 is therefore dimensioned in such a way that, seen in the width direction y, it completely covers the rolling stock 3 even when the rolling stock 3, based on the treatment line, which has the maximum possible width.
  • the cooling device 4 also has a number of second cooling beams 7.
  • the second cooling beams 7 also extend completely over the rolling stock 3, viewed in the width direction y of the rolling stock 3.
  • the cooling beams 6, 7 could all be arranged below the rolling stock 3 (or below the rollers 5).
  • the corresponding statements on the arrangement and configuration of the cooling beams for the cooling beams 6, 7 remain unchanged in this case. It is also possible that cooling bars 6, 7 are arranged both above and below the rolling stock 3. In this case, the corresponding statements on the arrangement and configuration of the cooling beams 6, 7 apply independently of one another to the cooling beams 6, 7 arranged above the rolling stock 3 on the one hand and the cooling beams 6, 7 arranged below the rolling stock 3 on the other.
  • the first cooling beam 5 has, as shown in FIG FIG 3 several coolant outlets 8 towards the rolling stock 3.
  • water 9 see fig FIG 1 and 4th
  • the coolant outlets 8 are as shown in FIG FIG 3 arranged in a stationary manner in the first chilled beam 6.
  • the coolant outlets 8 can be arranged in a row or in several rows as required. Within the respective row, the coolant outlets 8, viewed in the width direction y of the rolling stock 3, each have a predetermined distance a1 from one another. The distance can be in the range of a few cm, for example 4 cm to 8 cm.
  • the coolant outlets 8 also extend overall over the entire width of the rolling stock 3.
  • the side edges of a rolling stock 3 with the maximum possible width are in FIG 3 shown in dashed lines.
  • the center line of the roller table defined by the rollers 5 is also shown in dash-dotted lines.
  • the coolant outlets 8 of the first cooling bar 6 are generally designed to be uniform. The following is used in conjunction with FIGS. 4 and 5 therefore only one of the coolant outlets 8 is explained in more detail. The corresponding statements apply but also for the other coolant outlets 8 of the first cooling bar 6.
  • the coolant outlet 8 is designed as a full jet nozzle.
  • a full jet 10 thus emerges from the full jet nozzle during operation.
  • a full jet 10 and, correspondingly, a full jet nozzle are characterized in that the full jet 10 does not, or at least only slightly, expands.
  • a beam opening angle ⁇ 1, which the full beam 10 has, is generally a maximum of 5 °, often only 3 ° or only 2 ° or even an even lower value. In the ideal case, the beam opening angle ⁇ 1 is 0 ° or as close as possible to 0 °.
  • FIG 5 shows the cross-section 11 of the full jet 10 after exiting the coolant outlet 8.
  • a distance b of the cross-sectional plane 12, in which the cross-section 11 is detected can correspond to the illustration in FIG FIG 4 for example between 20% and 80% of the distance that the coolant outlet 8 has from the rolling stock 3, as seen in the jet direction r.
  • the beam direction r is as shown in FIG FIG 1 and 4th orthogonal to the transport direction x and also orthogonal to the width direction y.
  • the cross section 11 of the full jet 10 is coherent, but not convex.
  • the associated convex envelope thus contains (at least) one area 13 which is contained in the convex envelope, but not in the respective full jet 10 itself.
  • the convex envelope has a maximum extent D, as seen in the cross-sectional plane 12. In the case of the arrangement according to FIG 5 this is the diameter of the convex hull.
  • the cross-section 11 in turn has a maximum effective width d in the cross-sectional plane 12.
  • the maximum effective width d of the cross section 11 can generally be defined as follows: One chooses any starting point P1 at the edge of the cross-section 11 and, starting from the point P1, draws a straight line L which enters the cross-section 11. The end point P2 is determined at which the line L emerges from the cross-section 11 again.
  • the two angles ⁇ 1 and ⁇ 2 are determined, at which the line L enters the cross-section at the starting point P1 and at the end point P2 or exits the cross-section 11.
  • Each of the two angles ⁇ 1 and ⁇ 2 can be a maximum of 90 °.
  • the length of the now determined line L is the effective width for the starting point P1.
  • This effective width is, so to speak, a "candidate" for the maximum effective width d.
  • the starting point P1 is now varied and the length of the respective effective width is determined for each starting point P1.
  • the respective "candidate" for the maximum effective width d is thus determined.
  • the maximum of the effective widths determined is the maximum effective width d sought.
  • the maximum effective width d is always smaller than the maximum extent D.
  • the ratio of the maximum extent D to the effective width d is preferably greater than 3: 1, in particular greater than 5: 1.
  • the cross section 11 is closed in a ring.
  • the cross-section 11 surrounds a single, coherent area 13, which is completely enclosed by the cross-section 11 as seen in the cross-sectional plane 12.
  • the effective width at any point P1 can be defined as follows: The starting point P1 is placed on the outer edge of the cross-section 11, i.e. on the edge of the cross-section 11 facing away from the area 13. Starting from the starting point P1, one looks for the end point P2 at which the connecting line L with the starting point P1 at the end point P2 in the Area 13 enters. Now the end point P2 is varied until the length of the connecting line L between the starting point P1 and the end point P2 is minimal. The length of the line L determined in this way is the effective width for the starting point P1. By varying the starting point P1, the maximum effective width d can thus be determined as before.
  • the cross section 11 forms a circular ring.
  • other ring-shaped (closed) cross-sections are also possible, for example in accordance with the representations in FIG FIGS. 6 to 9 Cross-sections based on a square (alternatively, for example, a rectangle) or on ellipses or ovals.
  • the cross section 11 can be designed as part of a circular ring.
  • the circular ring can extend, for example, over an extension angle ⁇ with respect to the center point 14 of the circular ring, which as a rule is at least 90 ° and a maximum of 270 °.
  • the extension angle ⁇ 2 is usually between 120 ° and 240 °, for example around 180 °.
  • the cross section 11 it is furthermore also possible for the cross section 11 to be V-shaped. As shown in the FIG 12 and 13th it is also possible for the cross section 11 to be designed in a zigzag shape. FIG 12 shows this for an N-form, FIG 13 for a W shape.
  • the second cooling beams 7 have according to FIG 14 - Analogously to the first cooling beam 6 - towards the rolling stock 3 also in each case a plurality of coolant outlets 15. Water 9 is also applied to the rolling stock 3 by means of the coolant outlets 15 of the second cooling beams 7.
  • the second cooling beams 7, however, are arranged behind the first cooling beam 6 as seen in the transport direction x of the rolling stock 3. Specifically, in FIG 14 that second chilled beam 7 is shown, which is the first chilled beam 6, viewed in the transport direction x of the rolling stock 3, is immediately downstream.
  • the coolant outlets 15 are arranged in a stationary manner in the respective cooling bar 7.
  • the coolant outlets 15 are - analogous to the coolant outlets 8 of the first cooling bar 6 - arranged in a row or in several rows. Within the respective row, they indicate as shown in FIG 14 Viewed in the width direction y of the rolling stock 3, a predetermined distance a2 from one another in each case.
  • the distance a2 can in particular correspond to the distance a1 with which the coolant outlets 8 of the first cooling beam 6 are spaced apart from one another as seen in the width direction y of the rolling stock 3.
  • the arrangement of the coolant outlets 15 of the second cooling beams 7 can be as required. Especially with the in FIG 14
  • the second cooling beam 7 shown - that is, the cooling beam 7 that is directly downstream of the first cooling beam 6 as seen in the transport direction x of the rolling stock 3 - the coolant outlets 15 of the corresponding cooling beam 7 are, however, preferably between the coolant outlets 8 of the first cooling beam when viewed in the width direction y of the rolling stock 3 6 arranged.
  • the coolant outlets 15 of the second cooling beams 7 can be designed as required. It is possible here that the coolant outlets 15 of the second cooling bars 7 are all designed in the same way. However, it is also possible that the coolant outlets 15 of one of the second cooling bars 7 are designed differently than the coolant outlets 15 of another of the second cooling beam 7. The following explanations therefore each relate to a single second cooling beam 7. On the one hand, this does not preclude the coolant outlets 15 of the other second cooling beams 7 from being of the same design. On the other hand, however, it does not necessarily imply that the coolant outlets 15 of the other second cooling beams 7 are designed in the same way.
  • the coolant outlets 15 of one of the second cooling bars 7 can be designed in the same way as the coolant outlets 8 of the first cooling bar 6. Reference is made to the above explanations relating to FIGS FIGS. 4 to 13 referenced. If the coolant outlets 15 of at least one of the second cooling beams 7 are designed in this way, these second cooling beams 7 generally include at least that second cooling beam 7, which is immediately downstream of the first cooling beam 6 as seen in the transport direction x of the rolling stock 3.
  • the coolant outlets 15 of one of the second cooling bars 7 are designed as full jet nozzles, in accordance with the coolant outlets 8 of the first cooling bar 6, from which a full jet with a respective cross section emerges during operation (cf. FIG 4 ).
  • the cross section 16 of the full jets of the coolant outlets 15 of the corresponding second cooling bar 7 has a convex envelope which corresponds to the cross section 16 of the corresponding full jet.
  • the coolant outlets 15 of one of the second cooling beams 7 can be designed as fan nozzles.
  • the jets 17 emitted by means of these coolant outlets 15 have according to the illustration in FIG FIG 16 in at least one direction an appreciable beam opening angle ⁇ 2.
  • the beam opening angle ⁇ 2 is often above 40 °.
  • the spray pattern of the corresponding Coolant outlet 15 either as shown in FIG FIG 17 an elongated ellipse or as shown in FIG 18 be a circle. Orientation and rotation of the ellipses relative to the transport direction x and to the width direction y can be designed as required.
  • coolant outlets 15 of one of the second cooling bars 7 according to the illustration in FIG FIG 19 are designed as spray nozzles.
  • the water 9 is no longer sprayed directly onto the rolling stock 3, that is to say no longer impinging on the rolling stock 3 with an appreciable speed aimed at the rolling stock 3.
  • this second cooling beam 7 is not necessarily a second cooling beam 7, which is not immediately downstream of the first cooling beam 6.
  • first cooling beam 6 it is possible for the first cooling beam 6 to be designed as an intensive cooling beam.
  • the water 9 emerges from the coolant outlets 8, 15 of the corresponding cooling bars 6, 7 with a pressure p1 which is at least 1 bar.
  • the pressure p1 is usually between 1.5 bar and 4 bar.
  • the first cooling beam 6 is designed as a laminar cooling beam.
  • the water 9 emerges from the coolant outlets 8, 15 of the corresponding cooling beams 6, 7 with a pressure p2 which is a maximum of 0.5 bar.
  • the pressure p2 is usually between 0.1 bar and 0.4 bar.
  • the water 9 can be supplied to the second cooling beam 7, which has fan nozzles or spray nozzles, at a higher pressure. Due to the design of the coolant outlets 15 as fan nozzles or spray nozzles, however, laminar cooling always takes place in these second cooling bars 7.
  • the present invention has many advantages.
  • the other advantages of full jets 10 are retained, however.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP19203498.1A 2019-10-16 2019-10-16 Dispositif de refroidissement à rayonnement de refroidissement pourvu de section transversale creuse Withdrawn EP3808466A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19203498.1A EP3808466A1 (fr) 2019-10-16 2019-10-16 Dispositif de refroidissement à rayonnement de refroidissement pourvu de section transversale creuse
CN202080072166.8A CN114555253B (zh) 2019-10-16 2020-10-14 具有带中空横截面的冷却剂射流的冷却装置
PCT/EP2020/078917 WO2021074233A1 (fr) 2019-10-16 2020-10-14 Dispositif de refroidissement à jets de liquide de refroidissement présentant une section transversale creuse
EP20788823.1A EP4045204B1 (fr) 2019-10-16 2020-10-14 Dispositif de refroidissement à rayonnement de refroidissement pourvu de section transversale creuse
US17/766,686 US20240075511A1 (en) 2019-10-16 2020-10-14 Cooling device with coolant jets having a hollow cross section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19203498.1A EP3808466A1 (fr) 2019-10-16 2019-10-16 Dispositif de refroidissement à rayonnement de refroidissement pourvu de section transversale creuse

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EP2789405A1 (fr) * 2013-04-09 2014-10-15 Siemens VAI Metals Technologies GmbH Section de refroidissement avec rampe de pulvérisation dotée d'une plaque terminale amovible
EP3395463A1 (fr) * 2017-04-26 2018-10-31 Primetals Technologies Austria GmbH Refroidissement d'un laminé
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EP4045204B1 (fr) 2023-10-11
EP4045204A1 (fr) 2022-08-24
CN114555253A (zh) 2022-05-27
EP4045204C0 (fr) 2023-10-11
CN114555253B (zh) 2024-10-18
US20240075511A1 (en) 2024-03-07
WO2021074233A1 (fr) 2021-04-22

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