EP0924003B1 - Kühlvorrichtung zum Kühlen eines heissen bewegten Metallbandes - Google Patents
Kühlvorrichtung zum Kühlen eines heissen bewegten Metallbandes Download PDFInfo
- Publication number
- EP0924003B1 EP0924003B1 EP98122254A EP98122254A EP0924003B1 EP 0924003 B1 EP0924003 B1 EP 0924003B1 EP 98122254 A EP98122254 A EP 98122254A EP 98122254 A EP98122254 A EP 98122254A EP 0924003 B1 EP0924003 B1 EP 0924003B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coolant
- coolant discharge
- cooling device
- shut
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
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
- B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- 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
Definitions
- the invention relates to a cooling device for cooling a hot moving metal strip by means of laminar coolant jets, consisting of at least one transverse to the tape running direction arranged water box, in the at least one coolant supply line flows out and from which a plurality of spaced apart Coolant discharges emerge, with each coolant discharge entering on the outlet side Shut-off device connects.
- the cooling of a rolled hot strip in the area of a hot rolling mill in Especially on the exit roller table of a finishing train, this is usually done in a laminar cooling section.
- the hot strip is cooled by laminar cooling water jets, the cooling effect depends very much on the formation of these cooling water jets.
- a laminar cooling water jet leads to a much stronger cooling than an turbulent jet, as a laminar cooling water jet is able to adhere to the To break through the hot strip surface forming vapor layer and thus a higher To achieve cooling effect.
- a laminar cooling water section essentially consists of several in a row arranged, extending transversely to the tape running water boxes. For the exit the cooling water from a water box under laminar flow conditions ensure, two basic design principles are known. After a Embodiment is the cooling water outlet opening from a cross to the tape running direction arranged gap formed over the entire bandwidth and so a continuous coolant curtain generated. This from DE-OS 35 23 829 and DE-OS 37 04 599 known embodiment, however, has the disadvantage that at Shutting off the cooling water supply while stopping the cooling water supply does not occur across the bandwidth. Maintaining a laminar coolant curtain is not possible when using slightly dirty cooling water. After a second Embodiment, each water tank has a variety of cooling water drains.
- Such cooling devices are from SU 910266 (XP-002140413), JP-A 08-155527, JP-A 55-153615 or DE-A 21 07 664 are already known.
- DE-A 21 07 664 the cooling water discharge lines from side to side to the belt running direction arranged siphon pipes through which the cooling water on the belt surface is applied.
- the cooling water discharge lines are immediately connected shut-off devices assigned to the water box (e.g. SU 910266).
- cooling devices When switching on the cooling device, it is desirable that the laminar Immediately adjusts the cooling water jet to immediately give a uniform cooling effect to reach. A turbulent jet of cooling water would become one after switching on reduced and non-reproducible cooling effect. There is also a defined one Cooling device shutdown situation required.
- a disadvantage of cooling devices of the type cited above is that after the cooling device has been switched off, it is still considerable Amounts of cooling water flow in, whereby this flow in part completely occurs unevenly, so that non-reproducible conditions occur and only there is very limited controllability.
- the object of the invention is therefore to avoid these disadvantages and a cooling device for cooling a hot moving metal strip using laminar coolant jets to propose, not only in the ongoing operation but also in the Switching on and switching off phase of the cooling device uniform flow conditions in the coolant jets occur and especially after switching off an uncontrolled Flow of coolant is safely avoided.
- each coolant drain also has a diffuser for Bundling of the coolant jet is assigned, the shut-off element being the diffuser is subordinate and the diameter of the through opening in the shut-off device is larger than that Diameter of the outlet opening in the diffuser.
- the coolant discharges are as downpipes trained, which project substantially vertically upwards in the water tank.
- trumpet-shaped discharge pipes result in manufacturing advantages that lead to a cause the cooling device to become significantly cheaper. Overall, one emerges significantly more compact assembly, reducing the risk of damage from ascending or stuck tape is significantly reduced.
- a flow stabilizer is installed in each Coolant drainage.
- This flow stabilizer is formed by at least one insert, preferably of two at right angles mutually standing, inserted in the coolant drain and the cross-sectional area the coolant discharge in guide elements dividing segments, preferably sheet metal, is composed.
- a significant simplification of the cooling device results from the fact that several or all shut-off devices assigned to the individual coolant discharge lines are mechanically coupled and are connected to a common adjustment drive.
- the mechanically coupled Shut-off devices are formed by a selector shaft, which is transverse to the longitudinal axis of the selector shaft has through openings at a distance from the coolant discharge lines to one another and with an adjustment drive from a position in which the through openings with the Coolant lines are aligned in a position in which the selector shaft Locks coolant drainage, is adjustable and vice versa.
- the shift shaft is in stored in a multi-part housing, into which the coolant discharges open, and that in the area of the control shaft penetrated by through openings in the Housing shells inserted annular sealing shells are arranged, which with the Coolant drains and the through openings penetrating the selector shaft have aligned through openings.
- the shut-off device is designed as a slide or ball valve.
- Fig. 1 shows a possible embodiment of the cooling device according to the invention for Cooling a moving hot metal strip 1 by means of laminar coolant jets.
- the hot Metal strip 1 is in this case on a transport roller table indicated by a roller table roller 2 from a rolling mill, not shown, or a single roll stand conveyed and at a distance below the cooling device with a preselected Transport speed transported.
- the cooling device consists of several water boxes 3, one of which is located in the 1 and 2 is shown.
- the water tank 3 has a central coolant supply 4 and a plurality of coolant lines 5 arranged in two rows (FIG. 2), which as downspouts are formed and protrude vertically upwards inside the water box 3.
- shut-off devices 6 On the outlet side connect to the coolant discharge lines 5 shut-off devices 6, with which the exit of Coolant from all coolant discharge lines 5 interrupted or started at the same time can be.
- the type of shut-off device is largely arbitrary. Is restrictive only to be taken into account here that the coolant jet leaving the shut-off device 6 must have laminar flow properties.
- the shut-off devices 6 can for example be designed as a slide or ball valves.
- the shut-off elements 6 are shown in FIGS. 1 and 2 coupled by a common switching shaft 7, which is connected to a common adjustment drive 9 is connected.
- Fig. 3 this is by a continuous shift shaft 7 and a multi-part housing 10, 11, 12 to a single compact component shutoff 6 shown in detail.
- the control shaft 7 is at a distance from the central axes 13, 14 of the coolant lines 5 from Passages through 15, which in the open position of the shift shaft 7 with the Coolant lines 5 are aligned.
- the selector shaft 7 With the adjustment drive 9, the selector shaft 7 is in a 90 ° pivoted closed position blocking the flow of the coolant is rotatable.
- the Switch shaft 7 is in a two-part housing formed by two housing shells 10, 11 via rotary bearings 16, 17 rotatably mounted and by means of axial bearings 18 in position to Coolant discharges 5 set.
- the coolant discharge lines 5 open into the housing 12, each coolant discharge line 5 a diffuser 21 inserted into the housing 12 for sealing the bundling of the Coolant jets is assigned.
- the clear width of the passage opening takes in the diffuser 21 linearly in the flow direction and then widens in the shut-off device 6 erratic, so that the diameter of the through hole 15 is larger than the diameter the passage channel in the diffuser 21.
- a flow stabilizer 22 is located in each coolant discharge line 5 to stabilize the flow built-in, of two guide elements standing cross-shaped at right angles to each other 23, 24, preferably sheet metal is formed, through which the open cross-sectional area of the coolant drain is divided into four segments of equal size over a limited distance.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
- Fig. 1
- einen Längsschnitt durch eine erfindungsgemäße Kühlvorrichtung zum Kühlen eines Metallbandes,
- Fig.2
- einen Querschnitt durch eine erfindungsgemäße Kühlvorrichtung zum Kühlen eines Metallbandes,
- Fig. 3
- einen Querschnitt durch das Absperrorgan.
Claims (9)
- Kühlvorrichtung zum Kühlen eines heißen bewegten Metallbandes (1) mittels laminarer Kühlmittelstrahlen, bestehend aus mindestens einem quer zur Bandlaufrichtung angeordneten Wasserkasten (3), in den mindestens eine Kühlmittelzuführleitung (4) mündet und aus dem eine Vielzahl von im Abstand voneinander angeordneten Kühlmittelableitungen (5) austreten und an jeder Kühlmittelableitung (5) austrittsseitig ein Absperrorgan (6) anschließt, dadurch gekennzeichnet, dass jeder Kühlmittelableitung (5) zusätzlich ein Diffusor (21) zur Bündelung des Kühlmittelstrahles zugeordnet ist, wobei das Absperrorgan (6) dem Diffusor (21) nachgeordnet ist und der Durchmesser der Durchgangsöffnung (15) im Absperrorgan größer ist als der Durchmesser der Austrittsöffnung im Diffusor (21).
- Kühlvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Kühlmittelableitungen (5) als Fallrohre ausgebildet sind, die im Wasserkasten (3) im wesentlichen vertikal nach oben ragen.
- Kühlvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in jede Kühlmittelableitung (5) ein Strömungsstabilisator (22) eingebaut ist.
- Kühlvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Strömungsstabilisator (22) von mindestens einem Einsatz gebildet ist, der aus vorzugsweise zwei im rechten Winkel zueinander stehenden, in die Kühlmittelableitung eingesetzten und die Querschnittsfläche der Kühlmittelableitung in Segmente teilenden Leitelementen (23, 24), vorzugsweise Blechen, zusammengesetzt ist.
- Kühlvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass mehrere oder alle der an die einzelnen Kühlmittelableitungen anschließenden Absperrorgane (6) mechanisch gekoppelt und mit einem gemeinsamen Verstellantrieb (9) verbunden sind.
- Kühlvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die mechanisch gekoppelten Absperrorgane (6) von einer Schaltwelle (7) gebildet sind, die quer zur Längsachse der Schaltwelle (7) im Abstand der Kühlmittelableitungen (5) zueinander Durchgangsöffnungen (15) aufweist und die mit einem Verstellantrieb (9) von einer Position in der die Durchgangsöffnungen (15) mit den Kühlmittelableitungen (5) fluchten in eine Position, in der die Schaltwelle (7) die Kühlmittelableitungen (5) sperrt, verstellbar ist und umgekehrt.
- Kühlvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Schaltwelle (7) in einem mehrteiligen Gehäuse (10, 11) gelagert ist, in welches die Kühlmittelableitungen (5) münden und dass im Bereich der von Durchgangsöffnungen (15) durchsetzten Schaltwelle (7) in die Gehäuseschalen eingesetzte ringförmige Dichtschalen (19) angeordnet sind, welche mit den Kühlmittelableitungen (5) und den die Schaltwelle (7) durchsetzenden Durchgangsöffnungen (15) fluchtende Durchtrittsöffnungen (20) aufweisen.
- Kühlvorrichtung nach einem der vorhergehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Absperrorgan (6) als Schieber ausgebildet ist.
- Kühlvorrichtung nach einem der vorhergehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Absperrorgan (6) als Kugelhahn ausgebildet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT213897 | 1997-12-18 | ||
| AT0213897A AT406834B (de) | 1997-12-18 | 1997-12-18 | Kühlvorrichtung zum kühlen eines heissen bewegten metallbandes |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0924003A2 EP0924003A2 (de) | 1999-06-23 |
| EP0924003A3 EP0924003A3 (de) | 2000-08-16 |
| EP0924003B1 true EP0924003B1 (de) | 2002-10-16 |
Family
ID=3528593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98122254A Expired - Lifetime EP0924003B1 (de) | 1997-12-18 | 1998-11-23 | Kühlvorrichtung zum Kühlen eines heissen bewegten Metallbandes |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6178768B1 (de) |
| EP (1) | EP0924003B1 (de) |
| AT (2) | AT406834B (de) |
| DE (1) | DE59805962D1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008010062A1 (de) * | 2007-06-22 | 2008-12-24 | Sms Demag Ag | Verfahren zum Warmwalzen und zur Wärmebehandlung eines Bandes aus Stahl |
| CN102266831B (zh) * | 2011-07-08 | 2012-11-07 | 东北大学 | 一种可形成高密度喷射流的冷却装置及制造方法 |
| CN108941222A (zh) * | 2018-09-28 | 2018-12-07 | 南京先河工程技术有限公司 | 一种模块化设计密闭冷却水箱装置及快换方法 |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2319309A (en) * | 1940-07-15 | 1943-05-18 | United Eng Foundry Co | Apparatus for rolling metal strip |
| US3025817A (en) * | 1959-03-25 | 1962-03-20 | Western Electric Co | Apparatus for dispensing fluid material |
| BE648850A (de) * | 1963-06-04 | |||
| US3294107A (en) * | 1964-03-02 | 1966-12-27 | Jones & Laughlin Steel Company | Apparatus for cooling hot bodies |
| NL156068B (nl) | 1970-02-17 | 1978-03-15 | Koninklijke Hoogovens En Staal | Koelsysteem voor een bewegende metaalband. |
| JPS51111411A (en) * | 1975-03-27 | 1976-10-01 | Nippon Steel Corp | Variable spray length spray header |
| JPS585730B2 (ja) * | 1978-10-16 | 1983-02-01 | 石川島播磨重工業株式会社 | 熱間圧延材の冷却装置 |
| JPS55153615A (en) * | 1979-05-21 | 1980-11-29 | Nippon Steel Corp | Method and apparatus for cooling hot steel sheet |
| SU910266A1 (ru) * | 1980-01-04 | 1982-03-07 | Магнитогорский государственный институт по проектированию металлургических заводов | Устройство дл охлаждени гор чекатанной полосы |
| US4497180A (en) * | 1984-03-29 | 1985-02-05 | National Steel Corporation | Method and apparatus useful in cooling hot strip |
| IT1177873B (it) * | 1984-07-04 | 1987-08-26 | Centro Speriment Metallurg | Dispositivo per il raffredamento di laminati a caldo piani |
| JPS61162223A (ja) * | 1985-01-10 | 1986-07-22 | Mitsubishi Heavy Ind Ltd | 加速冷却装置におけるノズルヘツダ |
| JPS62118914A (ja) * | 1985-11-19 | 1987-05-30 | Kawasaki Steel Corp | 熱金属板の冷却装置 |
| AT384624B (de) * | 1986-05-22 | 1987-12-10 | Voest Alpine Ag | Einrichtung zur gesteuerten waermebehandlung von weichenteilen |
| JP2610019B2 (ja) * | 1986-07-03 | 1997-05-14 | 新日本製鐵株式会社 | 熱鋼板の冷却方法 |
| DE3704599A1 (de) * | 1987-02-13 | 1988-08-25 | Schloemann Siemag Ag | Verfahren und vorrichtung zur kuehlung von walzband |
| US4899547A (en) * | 1988-12-30 | 1990-02-13 | Even Flow Products, Inc. | Hot strip mill cooling system |
| US4880032A (en) * | 1989-06-20 | 1989-11-14 | Doutt Kingsley A | Multiple port valve |
| JP2798587B2 (ja) * | 1993-08-30 | 1998-09-17 | 新日本製鐵株式会社 | パイプラミナノズル |
| JPH08155527A (ja) * | 1994-12-09 | 1996-06-18 | Nkk Corp | 熱間圧延金属帯の冷却装置 |
-
1997
- 1997-12-18 AT AT0213897A patent/AT406834B/de not_active IP Right Cessation
-
1998
- 1998-11-23 EP EP98122254A patent/EP0924003B1/de not_active Expired - Lifetime
- 1998-11-23 AT AT98122254T patent/ATE226118T1/de active
- 1998-11-23 DE DE59805962T patent/DE59805962D1/de not_active Expired - Lifetime
- 1998-12-14 US US09/211,583 patent/US6178768B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| AT406834B (de) | 2000-09-25 |
| EP0924003A2 (de) | 1999-06-23 |
| ATA213897A (de) | 2000-02-15 |
| US6178768B1 (en) | 2001-01-30 |
| ATE226118T1 (de) | 2002-11-15 |
| EP0924003A3 (de) | 2000-08-16 |
| DE59805962D1 (de) | 2002-11-21 |
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