WO1989003729A1 - Procede de production d'un rideau d'eau - Google Patents

Procede de production d'un rideau d'eau Download PDF

Info

Publication number
WO1989003729A1
WO1989003729A1 PCT/DE1988/000642 DE8800642W WO8903729A1 WO 1989003729 A1 WO1989003729 A1 WO 1989003729A1 DE 8800642 W DE8800642 W DE 8800642W WO 8903729 A1 WO8903729 A1 WO 8903729A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
slot
water curtain
curtain
boxes
Prior art date
Application number
PCT/DE1988/000642
Other languages
German (de)
English (en)
Inventor
Jürgen BOOS
Ingo Von Hagen
Christoph Prasser
Joachim RÖMER
Original Assignee
Mannesmann Ag
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 Mannesmann Ag filed Critical Mannesmann Ag
Priority to DE8888908673T priority Critical patent/DE3870886D1/de
Priority to AT88908673T priority patent/ATE75639T1/de
Publication of WO1989003729A1 publication Critical patent/WO1989003729A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • 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 tables, while rotationally symmetrical bodies are cooled under the water curtains, the axis of rotation being aligned parallel to the line of impingement of the water on the rolling stock and preferably being located vertically below it.
  • a major difficulty in the production of 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. Because of the large required width (max. 5 m for flat rolling stock, 15 - 30 m for pipes) of the water curtain, irregularities in the laminar flow in the form of constrictions can occur, which can even tear the water curtain at individual points.
  • 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 wide slot guide in a calming manner through a siphon-like overflow that extends 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 "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 edge regions after the flow through the slot slot guide in order to equalize the flow and controlled "fusion" of the edges. This is realized in that 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.
  • Turbulent flows in the area of the interface between adjacent sections of the water curtain can largely be converted into a laminar flow inside the outlet nozzle.
  • FIG. 1 shows a water box arrangement according to the invention in longitudinal section
  • FIG. 2 shows a cross section through the water tank arrangement according to line A-A in FIG. 1,
  • FIG. 3 shows a cross section through the water tank arrangement along line BB in FIG. 1
  • FIG. 4 shows a sheet metal strip for reducing the flow range, in a view and a top view
  • FIG. 5 hardness measurements on two test pieces depending on and 6 the distance of the measuring point from the interface of the water curtain sections
  • 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 slot slot 3 from the water tank 1 in free fall downwards.
  • This is assisted by the siphon-like overflow device, which is formed by the sheets 10 and 11 extending vertically from the cover or the bottom of the water box 1 into the liquid level and extending 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 4, 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 numeral 6 and lies clearly below the conical tapering formed by the guide webs 4, so that a zone for flow calming is formed 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 seams is achieved via the guide webs 4 Limit reduction beyond.
  • 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 seams is achieved via the guide webs 4 Limit reduction beyond.
  • FIG. 5 and FIG. 6 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 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)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Nozzles (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

Procédé de production de rideaux d'eau destinés au refroidissement de matières laminées. Afin d'obtenir un rideau d'eau uniforme, ou un débit d'eau à variations régulières, on dispose de manière appropriée les caissons d'eau et les ouvertures en fentes larges correspondantes.
PCT/DE1988/000642 1987-10-22 1988-10-12 Procede de production d'un rideau d'eau WO1989003729A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8888908673T DE3870886D1 (de) 1987-10-22 1988-10-12 Vorrichtung zur erzeugung eines wasservorhangs.
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
DEP3736021.3 1987-10-22
DE3736021 1987-10-22

Publications (1)

Publication Number Publication Date
WO1989003729A1 true WO1989003729A1 (fr) 1989-05-05

Family

ID=6338990

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1988/000642 WO1989003729A1 (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)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914218A1 (de) * 1989-04-27 1990-10-31 Mannesmann Ag Verfahren und vorrichtung zum abkuehlen eines langgestreckten, zylindrischen koerpers
DE3937626C1 (fr) * 1989-11-09 1991-01-31 Mannesmann Ag, 4000 Duesseldorf, De
FR2711325A1 (fr) * 1993-10-20 1995-04-28 Eko Stahl Gmbh Dispositif pour le refroidissement différencié de produits formant large-plats.
EP0650776A1 (fr) * 1993-11-02 1995-05-03 Sms Schloemann-Siemag Aktiengesellschaft Dispositif pour réfroidir des bandes laminées
EP3659436A1 (fr) 2018-11-30 2020-06-03 Bayer AG Lutte contre les plantes au moyen de l'énergie électrique
CN113845177A (zh) * 2021-10-19 2021-12-28 太原科技大学 一种基于非晶软磁合金的净水装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2235063B2 (de) * 1971-07-17 1976-05-06 Centro Sperimentale Metallurgico S.P.A., Rom Wasserkuehlvorrichtung fuer warmgewalzte metallbaender
DE2804982A1 (de) * 1977-02-07 1978-08-10 Davy Loewy Ltd Anordnung zum zufuehren eines kohaerenten kuehlfluessigkeits-vorhanges
US4300376A (en) * 1978-10-02 1981-11-17 Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgiques Cooling of rolled metal products
DE3334251A1 (de) * 1983-09-22 1985-04-11 Mannesmann AG, 4000 Düsseldorf Vorrichtung zur erzeugung eines laminaren wasservorhanges
DE3523829A1 (de) * 1984-07-04 1986-01-16 Centro Sperimentale Metallurgico S.p.A., Rom/Roma Vorrichtung zum kuehlen warmgewalzter flacher produkte

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2235063B2 (de) * 1971-07-17 1976-05-06 Centro Sperimentale Metallurgico S.P.A., Rom Wasserkuehlvorrichtung fuer warmgewalzte metallbaender
DE2804982A1 (de) * 1977-02-07 1978-08-10 Davy Loewy Ltd Anordnung zum zufuehren eines kohaerenten kuehlfluessigkeits-vorhanges
US4300376A (en) * 1978-10-02 1981-11-17 Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgiques Cooling of rolled metal products
DE3334251A1 (de) * 1983-09-22 1985-04-11 Mannesmann AG, 4000 Düsseldorf Vorrichtung zur erzeugung eines laminaren wasservorhanges
DE3523829A1 (de) * 1984-07-04 1986-01-16 Centro Sperimentale Metallurgico S.p.A., Rom/Roma Vorrichtung zum kuehlen warmgewalzter flacher produkte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Volume 5, No. 39, M-59; & JP,A,55 165 216 (ISHIKAWAJIMA HARIMA JUKOGYO K.K.), (23-12-1980). *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914218A1 (de) * 1989-04-27 1990-10-31 Mannesmann Ag Verfahren und vorrichtung zum abkuehlen eines langgestreckten, zylindrischen koerpers
DE3937626C1 (fr) * 1989-11-09 1991-01-31 Mannesmann Ag, 4000 Duesseldorf, De
EP0427359A2 (fr) * 1989-11-09 1991-05-15 MANNESMANN Aktiengesellschaft Procédé et dispositif pour le refroidissement accéléré d'un tuyau cylindrique en métal
EP0427359A3 (en) * 1989-11-09 1991-07-03 Mannesmann Aktiengesellschaft Method of and device for accelerated cooling of a cylindrical metal tube
FR2711325A1 (fr) * 1993-10-20 1995-04-28 Eko Stahl Gmbh Dispositif pour le refroidissement différencié de produits formant large-plats.
EP0650776A1 (fr) * 1993-11-02 1995-05-03 Sms Schloemann-Siemag Aktiengesellschaft Dispositif pour réfroidir des bandes laminées
CN1050784C (zh) * 1993-11-02 2000-03-29 Sms舒路曼-斯玛公司 冷却轧制带材的装置
EP3659436A1 (fr) 2018-11-30 2020-06-03 Bayer AG Lutte contre les plantes au moyen de l'énergie électrique
CN113845177A (zh) * 2021-10-19 2021-12-28 太原科技大学 一种基于非晶软磁合金的净水装置
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

Also Published As

Publication number Publication date
ATE75639T1 (de) 1992-05-15
CN1034497A (zh) 1989-08-09
EP0383786B1 (fr) 1992-05-06
EP0383786A1 (fr) 1990-08-29
DE3870886D1 (de) 1992-06-11

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