EP0383786B1 - Procede de production d'un rideau d'eau - Google Patents
Procede de production d'un rideau d'eau Download PDFInfo
- Publication number
- EP0383786B1 EP0383786B1 EP88908673A EP88908673A EP0383786B1 EP 0383786 B1 EP0383786 B1 EP 0383786B1 EP 88908673 A EP88908673 A EP 88908673A EP 88908673 A EP88908673 A EP 88908673A EP 0383786 B1 EP0383786 B1 EP 0383786B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- water curtain
- water tank
- wide
- curtain
- 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
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/005—Curtain coaters
-
- 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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
Definitions
- the invention relates to a device for generating a water curtain according to the preamble of patent claim 1.
- Laminar water curtains are created in order to specifically cool the rolling stock. These can be strips, sheets, slabs as well as pipes. As a rule, cooling must take place evenly. For this reason, the goods to be cooled must be aligned with the water curtains.
- Flat bodies are generally transported transversely to the water curtains and through them via roller conveyors, while rotationally symmetrical bodies are cooled under the water curtains, the axis of rotation being aligned parallel to the line of incidence of the water on the rolling stock and preferably being located vertically below it
- a major difficulty in producing a laminar water curtain is to produce a uniform thickness over the entire width of the water curtain, ie to ensure the same water supply at all points in the impact zone on the rolling stock to be cooled. Due to the large required width (max. 5 m for flat rolled material, 15 - 30 m for pipes) of the water curtain, irregularities in the laminar flow in the form of constrictions can occur, which can even lead to the water curtain tearing at individual points.
- DE-OS 33 34 251 it is known from DE-OS 33 34 251 to bend the side walls of the slit nozzle across the entire width of the water curtain in the area of the outlet opening in a convex manner transversely to the direction of flow of the cooling water, that is to say the outlet cross section from the sides to the center of the To enlarge slit nozzle.
- a disadvantage of this solution is in particular that the width of the water curtain produced is always constant, that is to say it cannot be adapted to the width or length of the rolling stock to be cooled.
- a disadvantage of this solution is that the formation of a laminar flow in the outlet nozzle is severely disrupted because the water in each water box is sprayed into the inlet zone of the wide slot nozzle through individually controllable round nozzles and leads to turbulence.
- Another disadvantage is that, as studies have shown, the water supply is uneven in the confluence zone ("interface") of the parts of the water curtain emerging from two adjacent water boxes, that is to say in the zone lying vertically below the bulkheads.
- the cross-section of the water curtain in these zones is approximately bone-shaped, so that in the rolling stock, seen across the width of the water curtain, there are both more and less intensive cooling than actually intended, and thus different microstructures occur.
- the object of the invention is to develop a device according to the preamble of claim 1 to the extent that these disadvantages are avoided as far as possible.
- the invention is based on dividing a water box device going over the required water curtain width into several mutually independent modules, i.e. into individual water boxes with their own water supply and their own water outlet opening, the individually produced water curtains of which in turn are to be combined to form a total water curtain.
- the device according to the invention ensures a safe formation of the laminar flow in the outlet nozzle, since the water already reaches the entry zone of the slot slot guide in a calming manner through a siphon-like overflow that goes over the entire width of each individual water box. This largely eliminates the negative effects of turbulence when the water enters from the adjustable feed line into the water tank.
- the invention avoids the "bone formation" in the impact zone of the water curtain on the rolling stock.
- the confluence of adjacent sections of the water curtain compared to the normal width of the impact zone (thickness of the water curtain) results in a central area with too little water supply, on each side of which there is an area with a too large one Water supply connects.
- This problem is solved according to the invention by providing a further targeted physical guidance of the water curtains in their marginal areas after flowing through the slot slot guide in order to equalize the flow and controlled "fusion" of the edges.
- the individual water boxes are arranged at a distance from one another, so that the partition between two immediately adjacent water boxes is no longer designed as a common partition wall but as individual walls.
- the water box arrangement according to the invention in FIG. 1 shows in longitudinal section a division into three spaced-apart water boxes 1, each of which is connected to a separately controllable water supply line 2.
- this device is shown in cross section along the line A-A and in Figure 3 in cross section along the line B-B.
- the water flows in laminar form through a wide slot guide 3 from the water tank 1 in free fall downwards.
- the siphon-like overflow device contributes to this, which is formed by the sheets 10 and 11 which project vertically from the cover or the bottom of the water box 1 into the liquid level and extend over the entire width of the water box 1.
- the sheet 11 forms together with the boundary wall 6, the slot guide 3, which has the same clear width over the entire width of the water tank 1.
- the edges of the three sections of the water curtain produced by the outflowing water are brought together by the guide webs 1, each of which laterally adjoins the wall 5 delimiting the narrow side of the slot guides 3 downwards.
- adjacent guide webs 4 are each inclined to one another and connected to one another at their ends to form a conical taper.
- the side walls 6 of all water boxes 1, like the metal sheets 11, are extended below the water boxes 1 and guide the slot guides 3 into a common outlet nozzle 7 for all water boxes 1.
- the exit plane of the outlet nozzle 7 is designated by the reference symbol 8 and lies clearly below the conical tapering formed by the guide webs 4, so that a zone for flow calming is created below this up to the exit plane 8.
- the clear width of the outlet nozzle 7 has been reduced locally in each case by a sheet metal strip 9, which is fastened to the inside of the sheet 11, in order to ensure that the water supply in the interfaces is reached via the guide bars 4 Limit reduction beyond.
- the results of hardness measurements on two steel tubes made of the material 29 CrMo 4 4 or 20 CrMo 4 4 treated according to the invention are shown graphically in FIG. 5 or FIG. 6 as a function of the distance of the measuring point from the interface of two sections of a water curtain.
- the hardness values on the inner and outer surface and in the middle of the pipe wall were determined.
- the course of these hardness values shows neither an increased nor a reduced cooling effect in the area of the interface.
- the absolute level of the individual values and their fluctuation range correspond entirely to the course that can be achieved in the best case with planned cooling.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Nozzles (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
Claims (3)
caractérisé en ce que
l'entrée dans le guide à fente plat (3) de chaque réservoir d'eau (1) est réalisée sous forme de trop-plein (10,11) du type siphon, qui s'étend sur toute la largeur du réservoir d'eau (1), en ce que les cloisons entre les réservoirs sont réalisées en tant que parois de limitation (5) séparées et à distance l'une de l'autre,
en ce que les parois de limitation (5) s'étendent de façon inclinée vers l'extérieur au-dessous du guide à fente plat (3) à chaque fois sous forme de barrettes de guidage (4) et forment, par paire, avec le réservoir d'eau (1) voisin, les rétrécissements coniques,
et en ce que la largeur de l'ouverture de passage de la buse de sortie commune (7) est diminuée localement dans la zone du rétrécissement conique.
caractérisé en ce que,
pour diminuer localement l'ouverture de passage de la buse de sortie (7), des plaques ou lames plates (9) en tôle ou en une autre matière, à surface lisse, sont fixées sur les surfaces internes des parois de limitation (6,11).
caractérisé en ce que
les plaques (9) présentent une section transversale, transversalement à la direction d'écoulement, plus épaisse vers le centre et plus mince vers les côtés longitudinaux.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88908673T ATE75639T1 (de) | 1987-10-22 | 1988-10-12 | Vorrichtung zur erzeugung eines wasservorhangs. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3736021 | 1987-10-22 | ||
DE3736021 | 1987-10-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0383786A1 EP0383786A1 (fr) | 1990-08-29 |
EP0383786B1 true EP0383786B1 (fr) | 1992-05-06 |
Family
ID=6338990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88908673A Expired - Lifetime EP0383786B1 (fr) | 1987-10-22 | 1988-10-12 | Procede de production d'un rideau d'eau |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0383786B1 (fr) |
CN (1) | CN1034497A (fr) |
AT (1) | ATE75639T1 (fr) |
DE (1) | DE3870886D1 (fr) |
WO (1) | WO1989003729A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3914218C2 (de) * | 1989-04-27 | 1994-08-18 | Mannesmann Ag | Verfahren und Vorrichtung zum Abschrecken eines metallischen langgestreckten, zylindrischen Körpers |
DE3937626C1 (fr) * | 1989-11-09 | 1991-01-31 | Mannesmann Ag, 4000 Duesseldorf, De | |
DE4335710C2 (de) * | 1993-10-20 | 1996-11-21 | Eko Stahl Gmbh | Vorrichtung zur differenzierten Abkühlung von Breitflacherzeugnissen |
DE4337342A1 (de) * | 1993-11-02 | 1995-05-04 | Schloemann Siemag Ag | Vorrichtung zum Kühlen von Walzbändern |
EP3659436A1 (fr) | 2018-11-30 | 2020-06-03 | Bayer AG | Lutte contre les plantes au moyen de l'énergie électrique |
CN113845177B (zh) * | 2021-10-19 | 2023-01-17 | 太原科技大学 | 一种基于非晶软磁合金的净水装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1595312A (en) * | 1977-02-07 | 1981-08-12 | Davy Loewy Ltd | Cooling apparatus |
GB2035526B (en) * | 1978-10-02 | 1983-08-17 | Centre Rech Metallurgique | Cooling of rolled metal products |
DE3334251C2 (de) * | 1983-09-22 | 1986-04-10 | Mannesmann AG, 4000 Düsseldorf | Vorrichtung zur Erzeugung eines Wasservorhanges zum Kühlen von Blechen und Bändern |
IT1177873B (it) * | 1984-07-04 | 1987-08-26 | Centro Speriment Metallurg | Dispositivo per il raffredamento di laminati a caldo piani |
-
1988
- 1988-10-12 WO PCT/DE1988/000642 patent/WO1989003729A1/fr active IP Right Grant
- 1988-10-12 DE DE8888908673T patent/DE3870886D1/de not_active Expired - Fee Related
- 1988-10-12 AT AT88908673T patent/ATE75639T1/de not_active IP Right Cessation
- 1988-10-12 EP EP88908673A patent/EP0383786B1/fr not_active Expired - Lifetime
- 1988-10-22 CN CN88107297.4A patent/CN1034497A/zh active Pending
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN, Volume 5, No. 39, M 59, abstract JP 55-165216 publ 1980-12-23 (ISHIKAWAJIMA HARIMA JUKOGYO K.K) * |
Also Published As
Publication number | Publication date |
---|---|
DE3870886D1 (de) | 1992-06-11 |
ATE75639T1 (de) | 1992-05-15 |
WO1989003729A1 (fr) | 1989-05-05 |
EP0383786A1 (fr) | 1990-08-29 |
CN1034497A (zh) | 1989-08-09 |
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