EP0174589A1 - Apparatus for heating or cooling metal products - Google Patents

Apparatus for heating or cooling metal products Download PDF

Info

Publication number
EP0174589A1
EP0174589A1 EP85111093A EP85111093A EP0174589A1 EP 0174589 A1 EP0174589 A1 EP 0174589A1 EP 85111093 A EP85111093 A EP 85111093A EP 85111093 A EP85111093 A EP 85111093A EP 0174589 A1 EP0174589 A1 EP 0174589A1
Authority
EP
European Patent Office
Prior art keywords
nozzles
medium
nozzle openings
outflow direction
sectional area
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Withdrawn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
EP85111093A
Other languages
German (de)
French (fr)
Inventor
Theodor Dipl.-Ing. Ortmanns
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.)
Otto Junker GmbH
Original Assignee
Otto Junker 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 Otto Junker GmbH filed Critical Otto Junker GmbH
Publication of EP0174589A1 publication Critical patent/EP0174589A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
    • F27B9/3011—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases arrangements for circulating gases transversally
    • 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
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/161—Gas inflow or outflow
    • F27B2005/162—Gas inflow or outflow through closable or non-closable openings of the chamber walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/166—Means to circulate the atmosphere
    • F27B2005/167—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine

Definitions

  • the invention relates to a device for heating or cooling metallic material in the form of strips, plates or blocks, which has a number of nozzles directed against the surface of the material, which are fed with at least one conveying device and at least one pressure channel with a medium stream, and wherein Medium flowing past the metallic material is either fed back to the nozzles in a circular movement or is partially or completely discharged via outflow lines.
  • Such heating and cooling devices are generally known. They are used, for example, in continuous systems. They are also used as ovens or cooling devices known with batch feed. As media are gas, gas mixture, spray and liquids, e.g. B. water, known.
  • the nozzles directed onto the surface of the crop are via pressure channels with a conveying device or several conveying devices, for. B. fans or pumps connected.
  • a conveying device or several conveying devices for. B. fans or pumps connected.
  • outflow channels can be arranged in addition to the nozzles or nozzle arrangements, which can be connected to the suction side of the fans. In these cases, the gas flowing past the surface of the material is sucked in by fans and, if necessary, is fed back to the blowing nozzles after flowing through a heat exchange device.
  • the invention is therefore based on the object of ensuring uniform heat treatment or cooling in devices for heating or cooling of the type mentioned at the beginning over the entire width of the metallic material illuminated by the jet streams.
  • the object according to the invention is achieved in that the total cross-sectional area of the nozzle openings decreases with respect to a plurality of nozzles arranged next to one another in the outflow direction of the medium.
  • the invention is based on the finding that, in the prior art devices for heating or cooling by means of jets of a medium emerging from nozzles, the flow velocity of the medium increases in the outflow direction as a result of the addition of the flows from the individual nozzles.
  • the increased flow velocities lead to an increased heat energy release during cooling or to an increased heat energy absorption during heating on the surface areas of the material in the direction of flow of the medium. This results in uneven cooling or heating of the metallic material, which is particularly evident in a large number of nozzles and in the case of long flow paths of the medium along the surface of the material.
  • the measure of the invention ensures that the flow rate of the treatment gas on the surface of the crop is constant or almost constant, so that the heat transfer or heat removal over the entire crop surface covered by the nozzles is thus even or almost uniform.
  • the decrease in the total cross-sectional area of the nozzle openings can relate to one row of nozzles or several rows of nozzles.
  • the decrease in the total cross-sectional area of the nozzle openings can take place continuously or in stages.
  • An expedient embodiment of the invention consists in that the nozzles are arranged at the same distance from one another and the cross sections of the nozzle openings are reduced in the outflow direction of the medium.
  • Another expedient embodiment of the invention comprises the arrangement of nozzles with the same cross-sectional area of the nozzle openings, but with a distance from one another that increases in the outflow direction.
  • a combination is also expedient in such a way that both the cross sections of the nozzle openings decrease and the distances between the nozzles increase in the gas outflow direction.
  • the furnace 1 shown in FIG. 1 is surrounded on the outside with a heat-insulating wall 2.
  • the interior of the furnace 1 is divided into the heating chamber 3, through which a metal block or a plurality of metal blocks 4 is or are conveyed via rollers 5, and into a pressure channel system 6.
  • a fan 7, which is driven by the electric motor 8, is arranged in the pressure duct system 6.
  • the suction side of the fan is connected to the heating chamber 3 via the opening 9 in the pressure duct system.
  • blow nozzles 10 On both sides of the metal block or the metal blocks 4 there are blow nozzles 10 on the side of the pressure channel system 6 facing the metal block surface, which are arranged in the direction of the opening 9 with an increasing distance from one another. The distances between the nozzles are selected so that the gas velocity on the surface of the metal block or the metal blocks opposite the blowing nozzles is the same or almost the same.
  • the treatment gas is drawn in by the fan 7 through the opening 9 from the heating chamber 3 in the direction of the arrow P1 and fed to the blowing nozzles 10 in the direction of the two arrows P2 via the pressure channel system 6.
  • the treatment gas is heated via suitable heat exchangers (not shown in the drawing) which are attached in the pressure channel system.
  • FIG. 2 shows an example with the suction of the treatment gas below the workpiece transport level, such as that is indicated by the arrow P3.
  • the nozzles are provided with ever smaller nozzle openings in the direction of the furnace bottom.
  • the nozzle openings 11 are reduced from top to bottom in such a way that the same flow velocities of the treatment gas occur on the entire block surface.
  • a nozzle arrangement with spacing between the nozzles increasing downwards can also be selected.
  • FIG. 3 provides for the treatment gas to be extracted from the heating chamber both above and below the metal block to be heated, as indicated by the arrows P4 and P5.
  • the distances between the nozzles from each other are increased approximately in the middle block height upwards and downwards.
  • FIG. 4 Another exemplary embodiment of the invention is shown in FIG. 4, the blowing nozzles being arranged on individual nozzle boxes in a manner known per se. Three nozzle boxes 12, 13 and 14 are shown in the cutout. Between the nozzle box 12 on the one hand and the nozzle boxes 13 and 14 on the other hand there are gas outflow channels 15 and 16 which open into the gas outflow channel 17 which is connected to the suction side of a fan (not shown).
  • the nozzle rows 10a, 10b, 10c, 10d, 10e, 10f are arranged on the nozzle box 12 with spacing between the nozzles increasing in the direction of the gas outflow channel 17 net.
  • the nozzle openings decrease from the nozzle rows 10c and 10d in the direction of the gas outflow channels 15 and 16.
  • the devices shown in FIGS. 1, 2, 3 and 4 are not only suitable for heating, but also for cooling metallic material. While gas is expediently used as the cooling medium in the case of the device according to FIG. 1, in the case of cooling devices according to FIGS. 2, 3 and 4 both gases and spray mist and liquids can be used as the cooling medium. When using spray mist or liquid as the cooling medium, the rows of nozzles according to FIGS. 3 and 4 are predominantly arranged horizontally.

Abstract

To ensure that, when medium flows are used which are delivered by means of at least one delivery device and nozzles fed thereby against the surface of the material, a uniform flow velocity of the medium and hence a uniform energy exchange are achieved at the surface of the material, the total cross-sectional area of the nozzle orifices (11), relative to a plurality of adjacent nozzles (10), decreases in the outflow direction of the medium. The decrease in the total cross- sectional area can be effected by reducing the cross-sections of the nozzle orifices in the outflow direction of the medium and/or by increasing the spacing of the nozzles in the outflow direction of the heating or cooling medium. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Erwärmen oder Kühlen von metallischem Gut in Form von Bändern, Platten oder Blöcken, die eine Anzahl von gegen die Gutoberfläche gerichtete Düsen aufweist, welche über wenigstens eine Fördervorrichtung und über wenigstens einen Druckkanal mit einem Mediumstrom gespeist werden und wobei das am metallischen Gut vorbeiströmende Medium entweder in einer Umlaufbewegung wieder den Düsen zugeführt oder über Abströmleitungen teilweise oder ganz abgeleitet wird.The invention relates to a device for heating or cooling metallic material in the form of strips, plates or blocks, which has a number of nozzles directed against the surface of the material, which are fed with at least one conveying device and at least one pressure channel with a medium stream, and wherein Medium flowing past the metallic material is either fed back to the nozzles in a circular movement or is partially or completely discharged via outflow lines.

Solche Vorrichtungen zum Erwärmen und Kühlen sind allgemein bekannt. Sie werden beispielsweise in Durchlaufanlagen eingesetzt. Auch ist ihre Verwendung als Öfen oder Kühleinrichtungen mit chargenweise Beschickung bekannt. Als Medien sind Gas, Gasgemisch, Sprühnebel und Flüssigkeiten, z. B. Wasser, bekannt.Such heating and cooling devices are generally known. They are used, for example, in continuous systems. They are also used as ovens or cooling devices known with batch feed. As media are gas, gas mixture, spray and liquids, e.g. B. water, known.

Dabei sind in bekannter Weise die auf die Gutoberfläche gerichteten Düsen über Druckkanäle mit einer Fördervorrichtung oder mehreren Fördervorrichtungen, z. B. Ventilatoren oder Pumpen verbunden. Zum Abführen des in den Behandlungsraum über die Düsen eingeströmten Mediums, insbesondere Gas- oder Gasgemisch, können neben den Düsen bzw. Düsenanordnungen Abströmkanäle angeordnet sein, die mit der Saugseite der Ventilatoren verbunden sein können. Das an der Gutoberfläche vorbeiströmende Gas wird in diesen Fällen über Ventilatoren angesaugt und dabei gegebenenfalls nach Durchströmen einer Wärmeaustauschvorrichtung wieder den Blasdüsen zugeführt.In this case, the nozzles directed onto the surface of the crop are via pressure channels with a conveying device or several conveying devices, for. B. fans or pumps connected. To discharge the medium flowing into the treatment room via the nozzles, in particular gas or gas mixture, outflow channels can be arranged in addition to the nozzles or nozzle arrangements, which can be connected to the suction side of the fans. In these cases, the gas flowing past the surface of the material is sucked in by fans and, if necessary, is fed back to the blowing nozzles after flowing through a heat exchange device.

Es ist jedoch auch insbesondere bei Kühleinrichtungen und bei Verwendung von Luft, Sprühnebel oder Wasser als Kühlmittel bekannt, das Medium im Behandlungsraum nicht immer wieder in eine Umlaufbewegung zu versetzen, sondern nach Nutzung aus der Kühlvorrichtung abzuleiten.However, it is also known, in particular in the case of cooling devices and when using air, spray mist or water as the coolant, not to set the medium in the treatment room repeatedly in a circulating movement, but to derive it from the cooling device after use.

Zur Erzielung einer möglichst gleichmäßigen Wärmeübertragung auf das metallische Gut ist es bekannt, Düsen mit gleicher Querschnittsfläche der Düsenöffnungen und mit gleichen Abständen der Düsen voneinander zu verwenden. Mit diesen Maßnahmen konnte bisher eine gleichmäßige Erwärmung bzw. Kühlung über die gesamte Ausdehnung von insbesondere breitem metallischem Gut in Form von Bändern, Platten oder Blöcken noch nicht in befriedigender Weise erzielt werden.To achieve the most uniform possible heat transfer to the metallic material, it is known to use nozzles with the same cross-sectional area of the nozzle openings and with the same distances between the nozzles. With these measures it has not yet been possible to achieve a satisfactory heating or cooling over the entire extent of, in particular, wide metallic material in the form of strips, plates or blocks.

Der Erfindung liegt daher die Aufgabe zugrunde, bei Vorrichtungen zum Erwärmen oder Kühlen der eingangs genannten Art über die gesamte Breite des von den Düsenströmen angestrahlten metallischen Gutes eine gleichmäßige Wärmebehandlung bzw. Kühlung zu gewährleisten.The invention is therefore based on the object of ensuring uniform heat treatment or cooling in devices for heating or cooling of the type mentioned at the beginning over the entire width of the metallic material illuminated by the jet streams.

Die Aufgabe gemäß der Erfindung wird dadurch gelöst, daß die Gesamtquerschnittsfläche der Düsenöffnungen bezogen auf mehrere nebeneinander angeordnete Düsen in Abströmrichtung des Mediums hin abnimmt.The object according to the invention is achieved in that the total cross-sectional area of the nozzle openings decreases with respect to a plurality of nozzles arranged next to one another in the outflow direction of the medium.

Der Erfindung liegt die Erkenntnis zugrunde, daß sich bei den zum Stande der Technik gehörenden Vorrichtungen zum Erwärmen oder Kühlen mittels aus Düsen austretenden Strahlen eines Mediums die Strömungsgeschwindigkeit des Mediums in Abströmrichtung infolge der Addition der Ströme aus den einzelnen Düsen erhöht. Die erhöhten Strömungsgeschwindigkeiten führen zu einer erhöhten Wärmeenergieabgabe beim Kühlen bzw. zu einer erhöhten Warmeenergieaufnahme beim Erwärmen an den Oberflächenbereichen des Gutes in Abströmrichtung des Mediums. Dadurch tritt eine ungleichmäßige Kühlung bzw. Erwärmung des metallischen Gutes auf, die bei einer Vielzahl von Düsen und bei langen Abströmwegen des Mediums entlang der Gutoberfläche besonders stark in Erscheinung tritt.The invention is based on the finding that, in the prior art devices for heating or cooling by means of jets of a medium emerging from nozzles, the flow velocity of the medium increases in the outflow direction as a result of the addition of the flows from the individual nozzles. The increased flow velocities lead to an increased heat energy release during cooling or to an increased heat energy absorption during heating on the surface areas of the material in the direction of flow of the medium. This results in uneven cooling or heating of the metallic material, which is particularly evident in a large number of nozzles and in the case of long flow paths of the medium along the surface of the material.

Durch die Maßnahme der Erfindung ist gewährleistet, daß die Strömungsgeschwindigkeit des Behandlungsgases an der Gutoberfläche konstant bzw. nahezu konstant ist, so daß damit auch die Wärmeübertragung bzw. der Wärmeentzug über die gesamte von den Düsen erfaßte Gutoberfläche gleichmäßig bzw. nahezu gleichmäßig ist.The measure of the invention ensures that the flow rate of the treatment gas on the surface of the crop is constant or almost constant, so that the heat transfer or heat removal over the entire crop surface covered by the nozzles is thus even or almost uniform.

Die Abnahme der Gesamtquerschnittsfläche der Düsenöffnungen kann sich auf eine Düsenreihe oder mehrere Düsenreihen beziehen.The decrease in the total cross-sectional area of the nozzle openings can relate to one row of nozzles or several rows of nozzles.

Nach einer weiteren Ausgestaltung der Erfindung kann die Abnahme der Gesamtquerschnittsfläche der Düsenöffnungen stufenlos oder stufenweise erfolgen.According to a further embodiment of the invention, the decrease in the total cross-sectional area of the nozzle openings can take place continuously or in stages.

Ein zweckmäßiges Ausführungsbeispiel der Erfindung besteht darin, daß die Düsen in gleichem Abstand voneinander angeordnet und dabei die Querschnitte der Düsenöffnungen in Abströmrichtung des Mediums verkleinert sind.An expedient embodiment of the invention consists in that the nozzles are arranged at the same distance from one another and the cross sections of the nozzle openings are reduced in the outflow direction of the medium.

Eine weitere zweckmäßige Ausgestaltung der Erfindung umfaßt die Anordnung von Düsen mit gleicher Querschaittsfäche der Düsenöffnungen, jedoch mit in Abströmrichtung größer werdendem Abstand voneinander.Another expedient embodiment of the invention comprises the arrangement of nozzles with the same cross-sectional area of the nozzle openings, but with a distance from one another that increases in the outflow direction.

Auch ist eine Kombination in der Weise zweckmäßig, daß in Gasabströmrichtung sowohl die Querschnitte der Düsenöffnungen abnehmen als auch die Abstände der Düsen zueinander größer werden.A combination is also expedient in such a way that both the cross sections of the nozzle openings decrease and the distances between the nozzles increase in the gas outflow direction.

Anhand von Ausführungsbeispielen wird die Erfindung nachstehend erläutert:

  • Fig. 1 zeigt den Querschnitt eines Ofens mit in Abströmrichtung des Behandlungsgases in größer werdendem Abstand angeordneten Düsen,
  • Fig. 2 einen Ausschnitt aus einer Düsenanordnung mit in Abströmrichtung des Behandlungsgases kleiner werdenden Düsenöffnungen,
  • Fig. 3 einen Ausschnitt aus einer Düsenanordnung mit beidseitiger Abströmrichtung des Behandlungsgases und
  • Fig. 4 den Ausschnitt einer Draufsicht einer Düsenanordnung mit zwischen Blaskästen angeordneten Abströmkanälen für das Behandlungsgas.
The invention is explained below using exemplary embodiments:
  • 1 shows the cross section of a furnace with nozzles arranged at a greater distance in the outflow direction of the treatment gas,
  • 2 shows a section of a nozzle arrangement with nozzle openings which become smaller in the outflow direction of the treatment gas,
  • Fig. 3 shows a section of a nozzle arrangement with bilateral outflow direction of the treatment gas and
  • 4 shows the detail of a top view of a nozzle arrangement with outflow channels for the treatment gas arranged between blow boxes.

Der in Fig. 1 gezeigte Ofen 1 ist außen mit einer wärmedämmendenden Wandung 2 umgeben. Der Innenraum des Ofens 1 ist in den Heizraum 3, durch den ein Metallblock oder mehrere Metallblöcke 4 über Rollen 5 hindurchgefördert wird bzw. werden, und in ein Druckkanalsystem 6 unterteilt. Im Druckkanalsystem 6 ist ein Ventilator 7 angeordnet, der über den Elektromotor 8 angetrieben ist. Die Saugseite des Ventilators ist über die Öffnung 9 im Druckkanalsystem mit dem Heizraum 3 verbunden.The furnace 1 shown in FIG. 1 is surrounded on the outside with a heat-insulating wall 2. The interior of the furnace 1 is divided into the heating chamber 3, through which a metal block or a plurality of metal blocks 4 is or are conveyed via rollers 5, and into a pressure channel system 6. A fan 7, which is driven by the electric motor 8, is arranged in the pressure duct system 6. The suction side of the fan is connected to the heating chamber 3 via the opening 9 in the pressure duct system.

Zu beiden Seiten des Metallblocks bzw. der Metallblöcke 4 befinden sich auf den der Metallblockoberfläche zugewandten Seite des Druckkanalsystems 6 Blasdüsen 10, die in Richtung Öffnung 9 hin mit immer größer werdendem Abstand voneinander angeordnet sind. Dabei sind die Abstände der Düsen voneinander so gewählt, daß die Gasgeschwindigkeit an der den Blasdüsen gegenüberliegenden Oberfläche des Metallblocks bzw. der Metallblöcke gleich bzw. nahezu gleich ist.On both sides of the metal block or the metal blocks 4 there are blow nozzles 10 on the side of the pressure channel system 6 facing the metal block surface, which are arranged in the direction of the opening 9 with an increasing distance from one another. The distances between the nozzles are selected so that the gas velocity on the surface of the metal block or the metal blocks opposite the blowing nozzles is the same or almost the same.

Das Behandlungsgas wird in Pfeilrichtung P1 vom Ventilator 7 durch die Öffnung 9 aus dem Heizraum 3 angesaugt und in Richtung der beiden Pfeile P2 über das Druckkanalsystem 6 den Blasdüsen 10 zugeführt. Bei der Umlaufbewegung wird das Behandlungsgas über geeignete im Druckkanalsystem angebrachte Wärmetauscher (in der Zeichnung nicht dargestellt) beheizt.The treatment gas is drawn in by the fan 7 through the opening 9 from the heating chamber 3 in the direction of the arrow P1 and fed to the blowing nozzles 10 in the direction of the two arrows P2 via the pressure channel system 6. During the circulating movement, the treatment gas is heated via suitable heat exchangers (not shown in the drawing) which are attached in the pressure channel system.

Während in Fig. 1 ein Ausführungsbeispiel der Erfindung gezeigt wird, bei dem das Behandlungsgas oberhalb des Metallblockes bzw. der Metallblöcke 4 aus dem Heizraum 3 angesaugt wird, zeigt Fig. 2 ein Beispiel mit der Absaugung des Behandlungsgases unterhalb der Werstücktransportebene, wie das mit dem Pfeil P3 angedeutet ist. In dieser Ausschnittzeichnung sind in weiterer Ausgestaltung der Erfindung die Düsen in Richtung Ofenboden mit immer kleiner werdenden Düsenöffnungen versehen. Die Düsenöffnungen 11 sind dabei so von oben nach unten verkleinert, daß sich an der gesamten Blockoberfläche gleiche Strömungsgeschwindigkeiten des Behandlungsgases einstellen. Bei diesem Ausführungsbeispiel kann anstelle der verkleinerten Düsenöffnungen auch eine DUsenanordnung mit nach unten sich vergrößernden Abständen der Düsen voneinander gewählt werden.While an embodiment of the invention is shown in FIG. 1, in which the treatment gas is sucked in from the heating chamber 3 above the metal block or blocks 4, FIG. 2 shows an example with the suction of the treatment gas below the workpiece transport level, such as that is indicated by the arrow P3. In this detail drawing, in a further embodiment of the invention, the nozzles are provided with ever smaller nozzle openings in the direction of the furnace bottom. The nozzle openings 11 are reduced from top to bottom in such a way that the same flow velocities of the treatment gas occur on the entire block surface. In this exemplary embodiment, instead of the reduced nozzle openings, a nozzle arrangement with spacing between the nozzles increasing downwards can also be selected.

Die in Fig. 3 dargestellte Ausführungsform der Erfindung sieht vor, das Behandlungsgas sowohl oberhalb als auch unterhalb des zu erwärmenden Metallblockes aus dem Heizraum abzusaugen, wie es die Pfeile P4 und P5 andeuten. In diesem Anwendungsfalle sind die Abstände der Düsen voneinander etwa in mittlere Blockhöhe an aufwärts und abwärts vergrößert. In Abänderung der in dieser Zeichnung dargestellten Düsenanordnung können auch hier Düsen mit von der mittleren Blockhöhe aufwärts und abwärts sich verkleinernden Düsenöffnungen verwendet werden.The embodiment of the invention shown in FIG. 3 provides for the treatment gas to be extracted from the heating chamber both above and below the metal block to be heated, as indicated by the arrows P4 and P5. In this application, the distances between the nozzles from each other are increased approximately in the middle block height upwards and downwards. In a modification of the nozzle arrangement shown in this drawing, it is also possible here to use nozzles with nozzle openings which decrease in size from the average block height upwards and downwards.

Ein weiteres Ausführungsbeispiel der Erfindung ist in Fig. 4 dargestellt, wobei in an sich bekannter Weise die Blasdüsen auf einzelnen Düsenkästen angeordnet sind. Es sind drei Düsenkästen 12, 13 und 14 im Ausschnitt dargestellt. Zwischen dem Düsenkasten 12 einerseits und den Düsenkästen 13 und 14 andererseits befinden sich Gasabströmkanäle 15 und 16, die in den Gasabstromkanal 17 münden, welcher mit der Saugseite eines nicht dargestellten Ventilators verbunden ist.Another exemplary embodiment of the invention is shown in FIG. 4, the blowing nozzles being arranged on individual nozzle boxes in a manner known per se. Three nozzle boxes 12, 13 and 14 are shown in the cutout. Between the nozzle box 12 on the one hand and the nozzle boxes 13 and 14 on the other hand there are gas outflow channels 15 and 16 which open into the gas outflow channel 17 which is connected to the suction side of a fan (not shown).

Auf dem Düsenkasten 12 sind die Düsenreihen 10a, lOb, 10c, 10d, 10e, 10f mit in Richtung auf den Gasabströmkanal 17 sich vergrößernden Abständen der Düsen voneinander angeordnet. Außerdem verkleinern sich die Düsenöffnungen von den Düsenreihen 10c und 10d ausgehend in Richtung auf die Gasabströmkanäle 15 und 16. Diese Ausführungsform ist besonders bei großen Werkstücken von Vorteil, die während der Behandlung nicht im Durchlaufverfahren durch den Heizraum hindurchgefördert werden, sondern im Heizraum ruhend verweilen.The nozzle rows 10a, 10b, 10c, 10d, 10e, 10f are arranged on the nozzle box 12 with spacing between the nozzles increasing in the direction of the gas outflow channel 17 net. In addition, the nozzle openings decrease from the nozzle rows 10c and 10d in the direction of the gas outflow channels 15 and 16. This embodiment is particularly advantageous for large workpieces that are not conveyed through the heating chamber during the treatment process, but remain dormant in the heating chamber.

Die in den Fig. 1, 2, 3 und 4 gezeigten Vorrichtungen sind nicht nur zum Erhitzen, sondern auch zum Kühlen von metallischem Gut geeignet. Während bei der Vorrichtung gemäß Fig. 1 in einem solchen Fall zweckmäßigerweise Gas als Kühlmedium eingesetzt wird, können bei Kühlvorrichtungen entsprechend den Fig. 2, 3 und 4 sowohl Gase als auch Sprühnebel und Flüssigkeiten als Kühlmedium eingesetzt werden. Beim Einsatz von Sprühnebel oder Flüssigkeit als Kühlmedium sind die Düsenreihen gemäß Fig. 3 und 4 vorwiegend horizontal angeordnet.The devices shown in FIGS. 1, 2, 3 and 4 are not only suitable for heating, but also for cooling metallic material. While gas is expediently used as the cooling medium in the case of the device according to FIG. 1, in the case of cooling devices according to FIGS. 2, 3 and 4 both gases and spray mist and liquids can be used as the cooling medium. When using spray mist or liquid as the cooling medium, the rows of nozzles according to FIGS. 3 and 4 are predominantly arranged horizontally.

Claims (6)

1. Vorrichtung zum Erwärmen oder Kühlen von metallischem Gut in Form von Bändern, Platten oder Blöcken, die eine Anzahl von gegen die Gutoberfläche gerichtete Düsen aufweist, welche über wenigstens eine Fördervorrichtung und über wenigstens einen Druckkanal mit einem Mediumsstrom gespeist werden und wobei das am metallischen Gut vorbeiströmende Medium entweder in einer Umlaufbewegung wieder den Düsen zugeführt oder über Abströnleitungen teilweise oder ganz abgeleitet wird, dadurch gekennzeichnet , daß die Gesamtquerschnittsfläche der Düsenöffnungen (11) bezogen auf mehrere nebeneinander angeordnete Düsen (10) in Abströmrichtung des Mediums hin abnimmt.1. A device for heating or cooling metallic material in the form of strips, plates or blocks, which has a number of nozzles directed against the surface of the material, which are fed with at least one conveying device and at least one pressure channel with a medium stream, and the metal Medium flowing past is either recirculated to the nozzles or partially or completely discharged via discharge lines, characterized in that the total cross-sectional area of the nozzle openings (11) decreases in the direction of flow of the medium in relation to several nozzles (10) arranged next to one another. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Gesamtquerschnittsfläche sich auf eine Düsenreihe (10) bzw. mehrere Düsenreihen (10a, 10b, 10c, 10d, 10e, 10f) bezieht.2. Device according to claim 1, characterized in that the total cross-sectional area relates to a row of nozzles (10) or a plurality of rows of nozzles (10a, 10b, 10c, 10d, 10e, 10f). 3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Abnahme der Gesamtquerschnittsfläche der Düsenöffnungen (11) stufenlos erfolgt.3. Apparatus according to claim 1, characterized in that the decrease in the total cross-sectional area of the nozzle openings (11) is carried out continuously. 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Düsen (10) im gleichen Abstand voneinander angeordnet sind, wobei die Querschnitte der Düsenöffnungen (11) in Abströmrichtung des Mediums verkleinert sind.4. Device according to one of claims 1 to 3, characterized in that the nozzles (10) are arranged at the same distance from one another, the cross sections of the nozzle openings (11) being reduced in the outflow direction of the medium. 5. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß Düsen (10) mit jeweils gleichem Querschnitt der Düsenöffnungen (11) in Abströmrichtung des Mediums hin mit größer werdendem Abstand voneinander angeordnet sind.5. Device according to one of claims 1 to 3, characterized in that nozzles (10) with the same cross section of the nozzle openings (11) are arranged in the outflow direction of the medium with increasing distance from each other. 6. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Querschnitte der Düsenöffnungen (11) in Abströmrichtung des Mediums abnehmen und die Abstände der Düsen (10) in Abströmrichtung des Mediums größer werden.6. Device according to one of claims 1 to 3, characterized in that the cross sections of the nozzle openings (11) decrease in the outflow direction of the medium and the distances between the nozzles (10) in the outflow direction of the medium become larger.
EP85111093A 1984-09-12 1985-09-03 Apparatus for heating or cooling metal products Withdrawn EP0174589A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3433433 1984-09-12
DE19843433433 DE3433433C1 (en) 1984-09-12 1984-09-12 Device for heating or cooling metallic goods

Publications (1)

Publication Number Publication Date
EP0174589A1 true EP0174589A1 (en) 1986-03-19

Family

ID=6245189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111093A Withdrawn EP0174589A1 (en) 1984-09-12 1985-09-03 Apparatus for heating or cooling metal products

Country Status (3)

Country Link
EP (1) EP0174589A1 (en)
DE (1) DE3433433C1 (en)
ES (1) ES296104Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283869A2 (en) * 1987-03-12 1988-09-28 Alusuisse-Lonza Services Ag Device to expose to a gas stream objects with flat surfaces in a position which can be traversed
WO1995020058A1 (en) * 1994-01-20 1995-07-27 Ebner-Industrieofenbau Gesellschaft Mbh Device for cooling the charge protection lid of annealing furnaces
DE102008020040A1 (en) * 2007-10-22 2009-04-23 Otto Junker Gmbh Furnace system i.e. roller hearth furnace system, for convective thermal treatment of copper flat coil, has radial ventilator arranged at blowing out side of heating unit in U-shaped flow channel system surrounding channel cross-section

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT401306B (en) * 1995-01-31 1996-08-26 Ebner Peter Dipl Ing Pusher furnace for the heat treatment of light-metal billets
BR9805962A (en) * 1997-01-30 2000-01-25 Loi Thermprocess Gmbh Oven with cover.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1051440A (en) * 1950-11-27 1954-01-15 Ruhrtaler Gesenkschmiederei F Heating furnace, in particular for hot stamping parts
FR1393921A (en) * 1964-05-15 1965-03-26 Ofenbau Fritz G M B H & Co K G Device for reducing internal stresses in reinforcing steel mesh for reinforced concrete
US3304071A (en) * 1965-01-05 1967-02-14 Sunbeam Equip Metal billet homogenizing furnace
DE2601658A1 (en) * 1976-01-17 1977-07-28 J F Mahler Fa Cooling channel for continuous heat treatment furnace - where cold protective gas flows through channel in adjustable directions
BE886651R (en) * 1980-12-12 1981-04-01 Centre Rech Metallurgique METHOD AND APPARATUS FOR ACCELERATED THIN STRIP COOLING

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1051440A (en) * 1950-11-27 1954-01-15 Ruhrtaler Gesenkschmiederei F Heating furnace, in particular for hot stamping parts
FR1393921A (en) * 1964-05-15 1965-03-26 Ofenbau Fritz G M B H & Co K G Device for reducing internal stresses in reinforcing steel mesh for reinforced concrete
US3304071A (en) * 1965-01-05 1967-02-14 Sunbeam Equip Metal billet homogenizing furnace
DE2601658A1 (en) * 1976-01-17 1977-07-28 J F Mahler Fa Cooling channel for continuous heat treatment furnace - where cold protective gas flows through channel in adjustable directions
BE886651R (en) * 1980-12-12 1981-04-01 Centre Rech Metallurgique METHOD AND APPARATUS FOR ACCELERATED THIN STRIP COOLING

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283869A2 (en) * 1987-03-12 1988-09-28 Alusuisse-Lonza Services Ag Device to expose to a gas stream objects with flat surfaces in a position which can be traversed
EP0283869A3 (en) * 1987-03-12 1990-03-14 Carl Prof.Dr.-Ing. Kramer Device to expose to a gas stream objects with flat surfaces in a position which can be traversed
WO1995020058A1 (en) * 1994-01-20 1995-07-27 Ebner-Industrieofenbau Gesellschaft Mbh Device for cooling the charge protection lid of annealing furnaces
DE102008020040A1 (en) * 2007-10-22 2009-04-23 Otto Junker Gmbh Furnace system i.e. roller hearth furnace system, for convective thermal treatment of copper flat coil, has radial ventilator arranged at blowing out side of heating unit in U-shaped flow channel system surrounding channel cross-section

Also Published As

Publication number Publication date
ES296104Y (en) 1989-02-01
DE3433433C1 (en) 1985-10-24
ES296104U (en) 1988-06-16

Similar Documents

Publication Publication Date Title
DE60113738T2 (en) Device for cooling and freezing goods
EP0649821B1 (en) Apparatus for heating or cooling of flat glass sheets or strips
DE2614663C3 (en) Device for treating a workpiece with ultraviolet light
EP2670897B1 (en) Oxidation furnace
DE3505256A1 (en) DEVICE FOR THE CONTACT-FREE LEADING OF TRACKS, IN PARTICULAR METAL BANDS, BY MEANS OF A GAS MEDIUM
DE19649073C2 (en) Device for cooling extruded profiles
DE2322918C3 (en) Cooling channel for with chocolate mass or the like. coated items
WO2017060129A1 (en) Baking oven with combined heat transmission
EP0174589A1 (en) Apparatus for heating or cooling metal products
DE3710901C2 (en)
DE3616228A1 (en) DEVICE FOR CONTINUOUS HEAT TREATMENT OF LONG-TERM TEXTILE PRODUCTS
DE4231453C1 (en)
WO2021043373A1 (en) Separating device, treatment system, method for separating two spatial regions, and method for treating workpieces
EP0664180B1 (en) Device for producing a flow of gas in a soldering apparatus
DE2446983A1 (en) Air distribution system for web drying chamber - ducting forms circuit terminating in multiple jets each side of web
EP0157290B1 (en) Apparatus for making shaped chocolate articles
EP3638822B1 (en) Apparatus and method for separating gas atmospheres
DE2432765B2 (en) PLANT FOR COOLING CASTING PARTS
DE2360401A1 (en) REFRIGERATOR, ESPECIALLY FOR FOOD
DE1900287A1 (en) Thermal treatment of paper and metal strips and - painted metal
DE19644499C2 (en) Drying device and method for drying crockery parts and / or trays in a continuous dishwasher
DE10150041A1 (en) Cooling system for the sheet output area of a printer has a cooling device for coolant used to cool the sheets after drying thus ensuring that the ink is sufficiently cool that the sheets do not stick together in an output stack
DE10126882C2 (en) Fluid flow shaper
DE2600724C2 (en) Air circulation device for drying systems
DE1257816B (en) Device for cooling or heating a metal strip

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH FR GB IT LI

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19861121

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ORTMANNS, THEODOR, DIPL.-ING.