EP0522360B1 - Pack of heat transfer plates for regenerative heat exchanger as well as process and apparatus for making profiled plates for this pack - Google Patents

Pack of heat transfer plates for regenerative heat exchanger as well as process and apparatus for making profiled plates for this pack Download PDF

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Publication number
EP0522360B1
EP0522360B1 EP92110722A EP92110722A EP0522360B1 EP 0522360 B1 EP0522360 B1 EP 0522360B1 EP 92110722 A EP92110722 A EP 92110722A EP 92110722 A EP92110722 A EP 92110722A EP 0522360 B1 EP0522360 B1 EP 0522360B1
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EP
European Patent Office
Prior art keywords
plates
profiling
pack
edge
sheets
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EP92110722A
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German (de)
French (fr)
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EP0522360A3 (en
EP0522360A2 (en
Inventor
Simon Kaastra
Gerd Dipl.-Ing. Köster
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Apparatebau Rothemuehle Brandt and Kritzler GmbH
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Apparatebau Rothemuehle Brandt and Kritzler GmbH
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Publication of EP0522360A3 publication Critical patent/EP0522360A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F28D19/041—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier with axial flow through the intermediate heat-transfer medium
    • F28D19/042—Rotors; Assemblies of heat absorbing masses
    • F28D19/044—Rotors; Assemblies of heat absorbing masses shaped in sector form, e.g. with baskets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49357—Regenerator or recuperator making

Definitions

  • the invention relates to a heating plate package for regenerative heat exchangers, which consists of a plurality of superimposed, flow channels between themselves and at least partially profiled, e.g. there are sheets provided with embossings which have a coating serving as surface protection, for example an enamel layer.
  • the invention also relates to a method and a device for producing such profiled sheets for heating plate packages provided with a surface coating.
  • Heating plate packs made of sheets with a coating serving as surface protection, especially enamelling, are always used in regenerative heat exchangers if, despite the risk of corrosion, they should have a sufficiently long service life and / or if the heating surfaces must be kept clean to reduce the risk of fire.
  • the invention aims to overcome the disadvantages that arise when packaging the known profiled sheets into a heating sheet package. Therefore, the task for the solution is to prevent damage to the surface protection coating on the edge edges of the profiled sheets and therefore also to avoid partial corrosion risk on the profiled sheets of the heating sheet packages.
  • the object of the invention is therefore fundamentally characterized in that at least the edge edges of the metal sheets lying directly adjacent to one another run at a minimum distance from one another at all points or are aligned without contact with one another. For this purpose, it is only necessary to provide all or a certain proportion of the sheets at their marginal edges with a flatter profile or profile than over their remaining surface areas.
  • the invention further provides that the minimum distance between the edge edges of the sheets is greater than the normal coating thickness and also greater than the coating thickness on the side faces of the edge edges facing each other. Touch voltages between the bead-like thickened edge edge coatings are avoided in any case and without any additional effort when assembling the heating plate packs.
  • the profiling height of the sheets is reduced at least in the area of their peripheral edges compared to the profiling height of their other surface areas. This can be done in that two directly adjacent one another Only one sheet has a profiled edge at a time, while the edge of the other sheet runs straight. However, it is also possible to provide one of two parallel edge edges of a sheet with a profile, while the other runs straight, and in this case to arrange the sheets lying directly adjacent to one another in their plane rotated by 180 ° relative to one another.
  • edge edges of the sheets which have the minimum spacing from one another are expediently provided within the heating sheet stack in such a way that they face the leading and trailing edges of the heat exchanger, i.e. with their bulge-like thickened surface coating, they run transversely to the direction of impact of the - aggressive - media acting on the heat exchanger.
  • the process according to the invention for the production of profiled sheets for heating sheet packets by rolling, pressing or embossing is essentially characterized in that other deformation forces are exerted on the zones of the sheets running along the edge edges in the sense of a flattening or tapering of the profile than on their remaining surface area. These other deformation forces can be generated at the same time as the actual profiling of the sheets.
  • the edge edge processing of the sheets takes place here simultaneously with the production of their actual profiling.
  • the zones of the metal sheets running along the peripheral edges can be re-rolled, pressed or embossed in order to maintain the profile flattening or tapering there.
  • a device for practicing the type of method consists of two profiling tool halves which can be brought into action from opposite sides on the flat sheet metal. It is characterized in that the areas of the profiling tool halves assigned to the edge edges of the metal sheets enclose between them a step-shaped offset or converging shaping profile.
  • Roller pairs or pairs of pressure plates or embossing plates with end sections or edge zones that are at least slightly inclined or stepped in relation to their main working plane can be used as profiling tool halves.
  • the rollers are provided at their ends with annular, smooth roller sections.
  • a device for practicing the method with which the zones of the sheets running along the edge edges can be re-rolled, pressed or embossed in the sense of a profile flattening is characterized by two post-mold halves which can be brought into action from opposite sides on the already profiled sheet narrow edge areas adjoining the edge edges of the sheets.
  • pairs of rollers or pairs of pressure plates or embossing plates with weakly inclined and profiled or offset and smooth and shaping surfaces can be used as postforming tool halves.
  • a pair of postforming rollers is used, its rollers are designed as folding rollers.
  • FIG. 1 of the drawing a cutout area from a heating plate stack 1 is shown, which is formed by a plurality of plates 2 lying directly or stacked one on top of the other, which are arranged, for example, alternately one above the other in two groups 2a and 2b.
  • At least the sheets 2 of group 2a, but preferably the sheets 2 of both groups 2a and 2b are profiled 3, z. B. in the form of features, as can be clearly seen in the sheets 2 of group 2a in Figure 1 of the drawing.
  • the individual profiles 3 have the form of irregular wavy lines on the sheets 2 of group 2a, which, however, do not only extend in the transverse direction of the sheets, as can be seen in FIG. 1, but also extend in the longitudinal direction of the sheet.
  • profilings 3 or forms, which run in the manner of irregular wavy lines, are of course molded into the individual sheets 2 in repeated repetition, as can also be seen in FIG. 1 of the drawing.
  • All of the sheets 2 in the heating sheet stack assigned to groups 2a and 2b are equipped with a coating 5 serving as surface protection, in particular an enamel layer 5, as shown in FIG. 3 of the drawing.
  • their profiles 3, which are produced, for example, as shapes, are designed such that at least the edge edges 6 of the sheets 2 of the two groups lying adjacent or directly stacked on top of one another at all points run at a minimum distance 8 from one another or are aligned without contact with one another, as can be seen both from FIG. 1 and from FIG. 2 of the drawing.
  • the minimum distance 8 between the edge edges 6 of the sheets 2 of adjacent groups 2a and 2b should in any case be larger than the thickness of the coating 5 in the region of the bead-like thickening formed by the material accumulation 7.
  • the conditions for maintaining the minimum distance 8 between the edge edges 6 of sheets 2 lying directly on top of one another can be met by at least one of them not being provided with a profile 3 over an edge strip of appropriate width, but rather being kept completely level, as is the case which is shown in Figures 1 and 2 of the drawing on the sheets 2 of group 2b.
  • FIGS. 1 and 2 of the drawing for a heating plate stack 1 can in turn be achieved by only one of two plates 2 lying directly adjacent to one another having a profiled edge 6, as shown by the plates of group 2a in FIG. 1, while the edge 6 of the other sheet 2 runs straight, as can be seen there from the group 2b.
  • Sheets 2 which have at least one or less of their profile along one of their peripheral edges 6 than on their entire remaining surface, can be produced by rolling, pressing or embossing, that is to say in various mechanical ways. In this case, 2 other zones are formed on the zones of the metal sheets running along the peripheral edges 6 Deforming forces exerted than on the central area on which the profiles 3 for delimiting the flow channels 4 are located.
  • the shaping in the area of the marginal edges 6 and the production of the profiling 3 can be carried out simultaneously or in one work step by appropriately designing the profiling tools, which can be carried out in the form of pairs of rollers or pairs of pressure plates or embossing plates.
  • a pair of rollers 11, the rollers 12 and 13 of which have a complementary matching profile of their bale circumference, can be seen as a device for producing sheets 2 for the construction of heating plate packages 1.
  • the two rollers 12 and 13 of the pair of rollers 11 have the more or less irregular initial configuration which produces the profile 3 in the form of features, as can be seen from FIG. 5 of the drawing.
  • the two rollers 12 and 13 of the roller pair 11 have shaping surfaces which are stepped against one another and are circular over their circumference, as can be seen from FIG.
  • sheets 2 can be produced in one operation, which are only completely flat along an edge 6 parallel to the direction of passage, while their remaining surface area with the more or less irregular profile 3 in the form of features.
  • sheets 2 can be produced in one continuous operation, for example by processing strip material, by using pairs of rollers explained with reference to FIGS. 4 to 6, prefabricated sheet blanks can be produced in an equivalent manner, but discontinuously, using pairs of pressure plates or embossing plates manufacture with the help of presses.
  • FIGS. 7 to 10 of the drawing options are also indicated that the object on which the invention is based can also be achieved in that the profiling height of the sheets 2 is reduced at least in the area of their peripheral edges 6 compared to the other surface areas.
  • FIG. 7 shows that it is possible to allow the profiling 3 of the sheets 2 to converge on both sides towards their edge edges 6 in order to achieve the desired minimum distance 8 in the region of the edge edges 6.
  • FIG. 8 illustrates that the same possibility can also be achieved if the profiling 3 of the sheets 2 ends on one side converging towards the edge 6.
  • devices for the production of the sheets 2 designed according to FIGS. 7 to 10, devices can be used which consist of two profiling tool halves which can be brought into action from opposite sides on the flat sheet metal.
  • the areas of these profiling tool halves assigned to the edge edges 6 of the sheets 2 must include a converging shaping profile corresponding to FIGS. 7 or 8, taking into account the sheet thickness to be machined in each case.
  • the device can be fitted with pairs of rollers or presses. or pairs of embossing plates, which act on the sheets 2 either only in one work step or in two successive work steps.
  • the heating plate packs 1 are assembled from the sheets 2 of groups 2a and 2b in such a way that the marginal edges 6 of the sheets 2, which have the minimum spacing 8 from one another, are turned towards the upstream and downstream sides of the heat exchanger media and consequently that Material accumulation of the bead-like thickening of its coating 5 comes to rest at locations which are exposed to a particularly high risk of corrosion.

Description

Die Erfindung betrifft ein Heizblechpaket für regenerative Wärmetauscher, welches aus einer Vielzahl aufeinanderliegender, Strömungskanäle zwischen sich freilassender und wenigstens zum Teil profilierter, z.B. mit Ausprägungen versehener Bleche besteht, die eine als Oberflächenschutz dienende Beschichtung, bspw. eine Emailleschicht, tragen.The invention relates to a heating plate package for regenerative heat exchangers, which consists of a plurality of superimposed, flow channels between themselves and at least partially profiled, e.g. there are sheets provided with embossings which have a coating serving as surface protection, for example an enamel layer.

Die Erfindung befaßt sich aber auch mit einem Verfahren und einer Vorrichtung zur Herstellung solcher mit einer Oberflächenbeschichtung versehener Profilbleche für Heizblechpakete.However, the invention also relates to a method and a device for producing such profiled sheets for heating plate packages provided with a surface coating.

Gattungsgemäße Heizblechpakete für regenerative Wärmetauscher sind durch die DE-B-26 16 816 bereits bekannt. Bekannt ist es aber für den Bau solcher Heizblechpakete auch schon, die aufeinanderliegenden, Strömungskanäle zwischen sich freilassenden und wenigstens zum Teil profilierten, z.B. mit Ausprägungen versehenen, Bleche nach GB-A-992 413 mit einer Oberflächenschutz-Beschichtung aus Emaille zu versehen. Die die Emailleschicht aufweisenden Bleche sind dabei gleichzeitig mit zwei verschiedenen Profilierungsarten benutzt, von denen die eine flach und die andere verhältnismäßig hoch angelegt ist. Während sich die relativ flache Profilierung unter einem Neigungswinkel zu den Plattenrändern, also schräg über die Plattenfläche erstreckt, ist die verhältnismäßig hoch gestaltete Profilierung parallel zu den Längsbegrenzungskanten der Platte angelegt. Jeweils in den Kreuzungsbereichen zwischen den Kämmen der flachen Profilierung und den Kämmen der hohen Profilierung sind benachbarte Heizbleche innerhalb des Heizblechpaketes gegeneinander abgestützt. Dort, wo jeweils ein Kamm der hohen Profilierung im Bereich der Randkante eines Bleches zu liegen kommt, findet dann auch ein Randkanten-Kontakt mit den Kämmen der flachen Profilierung des im Heizblechpaket benachbarten Heizbleches statt.Generic heating plate packs for regenerative heat exchangers are already known from DE-B-26 16 816. However, it is already known for the construction of such heating plate packs to provide the superimposed flow channels between them which are left free and at least partially profiled, for example provided with stampings, in accordance with GB-A-992 413 with a surface protection coating made of enamel. The sheets having the enamel layer are used simultaneously with two different types of profiling, one of which is flat and the other is relatively high. While the relatively flat profile under one Inclination angle to the plate edges, that is, obliquely extends over the plate surface, the relatively high profile is parallel to the longitudinal boundary edges of the plate. In each case in the intersection areas between the combs of the flat profile and the combs of the high profile, adjacent heating plates are supported against one another within the heating plate package. Wherever a comb of the high profile comes to rest in the area of the edge of a plate, edge contact with the combs of the flat profile of the heating plate adjacent in the heating plate package also takes place.

Heizblechpakete aus Blechen mit einer als Oberflächenschutz dienenden Beschichtung, insbesondere Emaillierung, kommen immer dann bei regenerativen Wärmetauschern zum Einsatz, wenn diese trotz Korrosionsgefahr eine ausreichend hohe Lebensdauer erreichen sollen und/oder wenn zur Verminderung der Brandgefahr eine leichte Reinhaltung der Heizflächen gewährleistet sein muß.Heating plate packs made of sheets with a coating serving as surface protection, especially enamelling, are always used in regenerative heat exchangers if, despite the risk of corrosion, they should have a sufficiently long service life and / or if the heating surfaces must be kept clean to reduce the risk of fire.

Beim Paketieren der profilierten Bleche zum Heizblechpaket kommt es häufig vor, daß die Kantenbereiche benachbarter Bleche bereits vor den übrigen Flächenbereichen miteinander in Kontaktberührung kommen. Das hat zur nachteiligen Folge, daß die Oberflächenbeschichtung im Randkantenbereich abplatzt, so daß dort der Oberflächenschutz verlorengeht und sich folglich eine erhöhte Korrosionsgefahr einstellt.When the profiled sheets are packaged to form the heating sheet stack, it often happens that the edge areas of adjacent sheets come into contact with one another before the other surface areas. This has the disadvantageous consequence that the surface coating flakes off in the edge area, so that the surface protection is lost there and consequently an increased risk of corrosion arises.

Die Erfindung zielt darauf ab, die beim Paketieren der bekannten Profilbleche zu einem Heizblechpaket erwachsenden Nachteile auszuräumen. Deshalb liegt die Aufgabe zur Lösung vor, Beschädigungen der Oberflächenschutz-Beschichtung an den Randkanten der profilierten Bleche zu unterbinden und daher auch partielle Korrosionsgefahr an den Profilblechen der Heizblechpakete zu vermeiden.The invention aims to overcome the disadvantages that arise when packaging the known profiled sheets into a heating sheet package. Therefore, the task for the solution is to prevent damage to the surface protection coating on the edge edges of the profiled sheets and therefore also to avoid partial corrosion risk on the profiled sheets of the heating sheet packages.

Der Gegenstand der Erfindung ist daher grundsätzlich dadurch gekennzeichnet, daß wenigstens die Randkanten der jeweils benachbart unmittelbar aufeinanderliegenden Blechen an allen Stellen in einem Mindestabstand voneinander verlaufen bzw. berührungsfrei voneinander ausgerichtet sind. Hierzu ist es lediglich nötig, alle oder einen bestimmten Anteil der Bleche an ihren Randkanten mit einer flacheren Profilierung bzw. Profilgebung zu versehen, als über ihre übrigen Flächenbereiche hinweg.The object of the invention is therefore fundamentally characterized in that at least the edge edges of the metal sheets lying directly adjacent to one another run at a minimum distance from one another at all points or are aligned without contact with one another. For this purpose, it is only necessary to provide all or a certain proportion of the sheets at their marginal edges with a flatter profile or profile than over their remaining surface areas.

Da eine gegenseitige Kontaktberührung unmittelbar aufeinanderliegender Bleche längs ihrer Randkanten unterbunden ist, kann dort ein aus Spannungszuständen resultierendes - in höchstem Maße unerwünschtes - Abplatzen der als Materialanhäufung anfallenden Kantenschutzschicht nicht vorkommen. Das gilt auch für solche profilierten Bleche, bei denen bei der Aufbringung der Oberflächenschutz-Beschichtung, und zwar insbesondere einer Emailleschicht, längs der Randkanten eine Anhäufung des Beschichtungsmaterials entstanden ist, die sich zu einer zwar geringfügigen, jedoch etwa wulstartig in Erscheinung tretenden Verdickung gegenüber der Flächenbeschichtung ausformt.Since a mutual contact contact of sheets lying directly on top of one another along their edge edges is prevented, there can be no chipping of the edge protection layer resulting from the accumulation of material as a result of stress conditions. This also applies to profiled sheets in which the surface protection coating, in particular an enamel layer, has accumulated along the edge edges of the coating material, resulting in a slight, but somewhat bulge-like, thickening compared to that Forms surface coating.

Die Erfindung sieht weiterhin vor, daß der Mindestabstand zwischen den Randkanten der Bleche größer ist als die normale Beschichtungsdicke und auch größer als die Beschichtungsdicke an den einander zugewendeten Seitenflächen der Randkanten. Berührungsspannungen zwischen den wulstartig verdickten Randkantenbeschichtungen werden so beim Zusammenbau der Heizblechpakete in jedem Falle und ohne jeden zusätzlichen Aufwand vermieden.The invention further provides that the minimum distance between the edge edges of the sheets is greater than the normal coating thickness and also greater than the coating thickness on the side faces of the edge edges facing each other. Touch voltages between the bead-like thickened edge edge coatings are avoided in any case and without any additional effort when assembling the heating plate packs.

Eine praktische Möglichkeit zur Lösung der gestellten Aufgabe besteht darin, daß die Profilierungshöhe der Bleche wenigstens im Bereich ihrer Randkanten gegenüber der Profilierungshöhe ihrer übrigen Flächenbereiche reduziert wird. Das kann dabei dadurch geschehen, daß von zwei benachbart unmittelbar aufeinanderliegenden Blechen jeweils nur eines eine profilierte Randkante hat, während die Randkante des anderen Bleches gerade verläuft. Möglich ist es aber auch, von zwei parallelen Randkanten eines Bleches jeweils eine mit einer Profilierung zu versehen, während die andere gerade verläuft und dabei die jeweils benachbart unmittelbar aufeinanderliegenden Bleche in ihrer Ebene relativ zueinander um 180° verdreht anzuordnen.A practical possibility to solve the problem is that the profiling height of the sheets is reduced at least in the area of their peripheral edges compared to the profiling height of their other surface areas. This can be done in that two directly adjacent one another Only one sheet has a profiled edge at a time, while the edge of the other sheet runs straight. However, it is also possible to provide one of two parallel edge edges of a sheet with a profile, while the other runs straight, and in this case to arrange the sheets lying directly adjacent to one another in their plane rotated by 180 ° relative to one another.

Die den Mindestabstand voneinander aufweisenden Randkanten der Bleche werden zweckmäßigerweise innerhalb des Heizblechpaketes so vorgesehen, daß sie jeweils der An- und Abströmkante des Wärmetauschers zugewendet sind, also mit ihrer wulstartig verdickten Oberflächenbeschichtung quer zur Auftreffrichtung der den Wärmetauscher beaufschlagenden - aggressiven - Medien verlaufen.The edge edges of the sheets which have the minimum spacing from one another are expediently provided within the heating sheet stack in such a way that they face the leading and trailing edges of the heat exchanger, i.e. with their bulge-like thickened surface coating, they run transversely to the direction of impact of the - aggressive - media acting on the heat exchanger.

Das erfindungsgemäße Verfahren zur Herstellung von Profilblechen zu Heizblechpakete durch Walzen, Drücken oder Prägen zeichnet sich im wesentlichen dadurch aus, daß auf die längs der Randkanten verlaufenden Zonen der Bleche im Sinne einer Profilabflachung bzw. -verjüngung andere Verformungskräfte ausgeübt werden als auf deren übrigen Flächenbereich. Dabei lassen sich diese anderen Verformungskräfte zum gleichen Zeitpunkt hervorbringen, zu welchem auch die eigentliche Profilierung der Bleche vorgenommen wird. Die Randkantenbearbeitung der Bleche findet hier also zeitgleich mit der Herstellung von deren eigentlicher Profilierung statt.The process according to the invention for the production of profiled sheets for heating sheet packets by rolling, pressing or embossing is essentially characterized in that other deformation forces are exerted on the zones of the sheets running along the edge edges in the sense of a flattening or tapering of the profile than on their remaining surface area. These other deformation forces can be generated at the same time as the actual profiling of the sheets. The edge edge processing of the sheets takes place here simultaneously with the production of their actual profiling.

Es ist allerdings nach der Erfindung auch vorgesehen, daß die längs der Randkanten verlaufenden Zonen der Bleche nachgewalzt, nachgedrückt oder nachgeprägt werden können, um dort die Profilabflachung bzw. -verjüngung zu erhalten.However, it is also provided according to the invention that the zones of the metal sheets running along the peripheral edges can be re-rolled, pressed or embossed in order to maintain the profile flattening or tapering there.

Eine erfindungsgemäße Vorrichtung zur Ausübung der Verfahrensart besteht aus zwei von entgegengesetzten Seiten her auf das ebene Blech zur Einwirkung bringbaren Profilierwerkzeughälften. Dabei ist sie dadurch gekennzeichnet, daß die den Randkanten der Bleche zugeordneten Bereiche der Profilierwerkzeughälften zwischen sich ein stufenförmig abgesetztes oder konvergierendes Formgebungsprofil einschließen.A device according to the invention for practicing the type of method consists of two profiling tool halves which can be brought into action from opposite sides on the flat sheet metal. It is characterized in that the areas of the profiling tool halves assigned to the edge edges of the metal sheets enclose between them a step-shaped offset or converging shaping profile.

Als Profilierwerkzeughälften können Walzenpaare oder Drück- bzw. Prägeplatten-Paare mit gegen ihre Haupt-Arbeitsebene zumindest schwach geneigten oder stufenförmig abgesetzten Endabschnitten bzw. Randzonen eingesetzt werden.Roller pairs or pairs of pressure plates or embossing plates with end sections or edge zones that are at least slightly inclined or stepped in relation to their main working plane can be used as profiling tool halves.

Bei Ausstattung der Vorrichtung mit Profilierwalzen-Paaren sind die Walzen an ihren Enden mit ringförmig abgesetzten Glattwalzen-Abschnitten versehen.If the device is equipped with profiling roller pairs, the rollers are provided at their ends with annular, smooth roller sections.

Eine Vorrichtung zur Ausübung des Verfahrens mit der die längs der Randkanten verlaufenden Zonen der Bleche im Sinne einer Profilabflachung nachgewalzt, -gedrückt oder -geprägt werden können, ist gekennzeichnet durch zwei von entgegengesetzten Seiten her auf das bereits profilierte Blech zur Einwirkung bringbare Nachform-Werkzeughälften für an die Randkanten der Bleche anschließende, schmale Randbereiche. Auch hier können als Nachform-Werkzeughälften Walzen-Paare oder Drück- bzw. Prägeplatten-Paare mit gegenüber den vorgeschalteten Profilierwerkzeughälften schwach geneigten und profilierten oder abgesetzten und glatten Formgebungsflächen eingesetzt werden. Im Falle der Benutzung eines Nachform-Walzenpaares sind schließlich dessen Walzen als Klappwalzen ausgebildet.A device for practicing the method with which the zones of the sheets running along the edge edges can be re-rolled, pressed or embossed in the sense of a profile flattening is characterized by two post-mold halves which can be brought into action from opposite sides on the already profiled sheet narrow edge areas adjoining the edge edges of the sheets. Here, too, pairs of rollers or pairs of pressure plates or embossing plates with weakly inclined and profiled or offset and smooth and shaping surfaces can be used as postforming tool halves. In the event that a pair of postforming rollers is used, its rollers are designed as folding rollers.

Anhand einer Zeichnung wird die Erfindung nachfolgend im einzelnen erläutert. Dabei zeigen

Figur 1
in Stirnansicht einen Teilbereich aus einem Heizblechpaket für regenerative Wärmetauscher,
Figur 2
im Schnitt entlang der Linie II-II der Figur 1 die voneinander abgewendeten Eckbereiche aus einem Heizblechpaket,
Figur 3
in vergrößertem Maßstab den Randkantenbereich eines Bleches aus dem Heizblechpaket mit Oberflächenschutz-Beschichtung und wulstartiger Verdickung derselben an der Randkante des Bleches, während die
Figuren 4 bis 6
in schematisch vereinfachter Darstellung ein Ausführungsbeispiel einer Vorrichtung wiedergeben, mit deren Hilfe die Herstellung von profilierten Blechen für den Bau von Heizblechpaketen möglich ist und sich aus den
Figuren 7 bis 10
weitere mögliche Gestaltungsformen für eine Profilierung der Bleche im Anschluß an ihre Randkanten ableiten lassen
The invention is explained in detail below with reference to a drawing. Show
Figure 1
a partial view from the front of a heating plate package for regenerative heat exchangers,
Figure 2
1 along the line II-II of FIG. 1, the corner regions facing away from one another from a heating plate stack,
Figure 3
on an enlarged scale the edge area of a sheet from the heating sheet package with surface protection coating and bulging thickening of the sheet edge on the edge, while the
Figures 4 to 6
reproduce in a schematically simplified representation an embodiment of a device with the help of which the production of profiled sheets for the construction of heating plate packs is possible and from the
Figures 7 to 10
further possible design forms for profiling allow the sheets to drain off at the edges

In Figur 1 der Zeichnung wird ein Ausschnittsbereich aus einem Heizblechpaket 1 dargestellt, das von einer Vielzahl von unmittelbar aufeinanderliegenden bzw. -gestapelten Blechen 2 gebildet ist, die bspw. in zwei Gruppen 2a und 2b abwechselnd übereinander angeordnet sind.In FIG. 1 of the drawing, a cutout area from a heating plate stack 1 is shown, which is formed by a plurality of plates 2 lying directly or stacked one on top of the other, which are arranged, for example, alternately one above the other in two groups 2a and 2b.

Mindestens die Bleche 2 der Gruppe 2a, vorzugsweise jedoch die Bleche 2 beider Gruppen 2a und 2b sind mit Profilierungen 3, z. B. in Form von Ausprägungen versehen, wie das deutlich an den Blechen 2 der Gruppe 2a in Figur 1 der Zeichnung zu erkennen ist.At least the sheets 2 of group 2a, but preferably the sheets 2 of both groups 2a and 2b are profiled 3, z. B. in the form of features, as can be clearly seen in the sheets 2 of group 2a in Figure 1 of the drawing.

Die einzelnen Profilierungen 3 haben an den Blechen 2 der Gruppe 2a die Form von unregelmäßigen Wellenlinien, welche sich aber nicht nur in Querrichtung der Bleche erstrecken, wie das in Figur 1 zu sehen ist, sondern die auch in Blech-Längsrichtung verlaufen.The individual profiles 3 have the form of irregular wavy lines on the sheets 2 of group 2a, which, however, do not only extend in the transverse direction of the sheets, as can be seen in FIG. 1, but also extend in the longitudinal direction of the sheet.

Die nach Art von unregelmäßigen Wellenlinien verlaufenden Profilierungen 3 bzw. Ausprägungen sind natürlich in vielfacher Wiederholung in die einzelnen Bleche 2 eingeformt, wie das ebenfalls aus Figur 1 der Zeichnung hervorgeht.The profilings 3 or forms, which run in the manner of irregular wavy lines, are of course molded into the individual sheets 2 in repeated repetition, as can also be seen in FIG. 1 of the drawing.

Die bspw. in Form von Ausprägungen ausgeführten Profilierungen 3 lassen jeweils zwischen zwei benachbart aufeinanderliegenden bzw. - gestapelten Blechen 2 innerhalb des Heizblechpaketes 1 eine Vielzahl von Strömungskanälen 4 frei, die in Hauptströmungsrichtung des mit dem Heizblechpaket 1 ausgestatteten regenerativen Wärmetauschers abwechselnd mit den verschiedenen Wärmetauschermedien beaufschlagt werden. Vorteilhaft ist dabei, wenn die zwischen den Blechen 2 des Heizblechpaketes 1 eingegrenzten Strömungskanäle 4 nicht nur im wesentlichen in Hauptströmungsrichtung der Wärmetauschermedien verlaufen, sondern auch entlang der Bleche erheblich von der geraden Hauptströmungsrichtung abweichen.The profiles 3, for example in the form of shapes, leave a plurality of flow channels 4 between two adjacent or stacked plates 2 within the heating plate stack 1, which alternately act on the different heat exchange media in the main flow direction of the regenerative heat exchanger equipped with the heating plate stack 1 become. It is advantageous if the flow channels 4 delimited between the sheets 2 of the heating sheet stack 1 are not only essentially in the main flow direction of the heat exchange media run, but also deviate significantly along the plates from the straight main flow direction.

Diese Auslegung des Heizblechpaketes 1 in Verbindung mit der sowohl in deren Querrichtung als auch in deren Längsrichtung unregelmäßig verlaufenden Wellung z. B. durch Ausprägungen gebildeten Profilierungen 3 erbringt eine beachtliche Steigerung der Wärmeübergangszahlen bei gleichzeitiger Senkung der Druckverluste.This design of the heating plate stack 1 in conjunction with the corrugation which runs irregularly both in the transverse direction and in the longitudinal direction thereof, for. B. Profiles formed by expressions 3 brings about a considerable increase in the heat transfer coefficients while reducing the pressure losses.

Sämtliche den Gruppen 2a und 2b zugeordneten Bleche 2 im Heizblechpaket sind, wie die Figur 3 der Zeichnung verdeutlicht, mit einer als Oberflächenschutz dienenden Beschichtung 5, insbesondere einer Emaillieschicht 5, ausgestattet.All of the sheets 2 in the heating sheet stack assigned to groups 2a and 2b are equipped with a coating 5 serving as surface protection, in particular an enamel layer 5, as shown in FIG. 3 of the drawing.

Beim Aufbringen dieser Beschichtung 5 können sich - fertigungsbedingt - längs der Randkanten 6 der Bleche 2 Materialanhäufungen 7 in Form einer wulstartigen Verdickung bilden, die den Vorteil einer erhöhten Schutzwirkung gegen aggressive Bestandteile der Medien an den Randkanten 6 gewährleisten. Diese Schutzwirkung ist allerdings nur dann dauerhaft gewährleistet, wenn dem Abplatzen der Beschichtung 5 und insbesondere der Materialanhäufungen 7 im Bereich der Randkanten 6 der Bleche 2 begegnet wird.When this coating 5 is applied, accumulations of material 7 in the form of a bead-like thickening can form along the edge 6 of the sheets 2, which ensure the advantage of an increased protective action against aggressive components of the media at the edge 6. However, this protective effect is only permanently ensured if the flaking off of the coating 5 and, in particular, of the material accumulations 7 in the region of the edge edges 6 of the metal sheets 2 is countered.

Um die Möglichkeit des Abplatzens der Beschichtung 5 und ggfs. der als wulstartige Verdickung anfallenden Materialanhäufungen 7 im Bereich der Randkanten 6 der Bleche 2 zu begegnen, sind deren Profilierungen 3, die bspw. als Ausprägungen hergestellt werden, so angelegt, daß wenigstens die Randkanten 6 der jeweils benachbart unmittelbar aufeinanderliegenden bzw. -gestapelten Bleche 2 der beiden Gruppen an allen Stellen in einem Mindestabstand 8 voneinander verlaufen bzw. berührungsfrei zueinander ausgerichtet sind, wie das sowohl aus Figur 1 als auch aus Figur 2 der Zeichnung ersichtlich ist.In order to counter the possibility of the coating 5 flaking off and, if necessary, the accumulations of material 7 which occur as a bulge-like thickening in the area of the edge edges 6 of the sheets 2, their profiles 3, which are produced, for example, as shapes, are designed such that at least the edge edges 6 of the sheets 2 of the two groups lying adjacent or directly stacked on top of one another at all points run at a minimum distance 8 from one another or are aligned without contact with one another, as can be seen both from FIG. 1 and from FIG. 2 of the drawing.

Der Mindestabstand 8 zwischen den Randkanten 6 der Bleche 2 benachbarter Gruppen 2a und 2b sollte dabei in jedem Falle größer bemessen werden als die Dicke der Beschichtung 5 im Bereich der durch die Materialanhäufung 7 gebildeten wulstartigen Verdickung.The minimum distance 8 between the edge edges 6 of the sheets 2 of adjacent groups 2a and 2b should in any case be larger than the thickness of the coating 5 in the region of the bead-like thickening formed by the material accumulation 7.

Im einfachsten Falle können die Bedingungen zur Einhaltung des Mindestabstandes 8 zwischen den Randkanten 6 unmittelbar aufeinanderliegender Bleche 2 dadurch eingehalten werden, daß jeweils mindestens eines derselben über einen Randstreifen von angemessener Breite hinweg nicht mit einer Profilierung 3 versehen, sondern vielmehr völlig eben gehalten wird, wie das in den Figuren 1 und 2 der Zeichnung an den Blechen 2 der Gruppe 2b gezeigt wird.In the simplest case, the conditions for maintaining the minimum distance 8 between the edge edges 6 of sheets 2 lying directly on top of one another can be met by at least one of them not being provided with a profile 3 over an edge strip of appropriate width, but rather being kept completely level, as is the case which is shown in Figures 1 and 2 of the drawing on the sheets 2 of group 2b.

Der aus den Figuren 1 und 2 der Zeichnung ersichtliche Aufbau für ein Heizblechpaket 1 läßt sich wiederum dadurch erreichen, daß von zwei benachbart unmittelbar aufeinanderliegenden Blechen 2 jeweils nur eines eine profilierte Randkante 6 hat, wie das die Bleche der Gruppe 2a in Figur 1 zeigen, während die Randkante 6 des anderen Bleches 2 gerade verläuft, wie das dort anhand der Gruppe 2b erkennbar ist.The structure shown in FIGS. 1 and 2 of the drawing for a heating plate stack 1 can in turn be achieved by only one of two plates 2 lying directly adjacent to one another having a profiled edge 6, as shown by the plates of group 2a in FIG. 1, while the edge 6 of the other sheet 2 runs straight, as can be seen there from the group 2b.

Zur Bildung eines solchermaßen aufgebauten Heizblechpaketes 1 ist es möglich, Bleche 2 zu benutzen, bei denen von zwei parallelen Randkanten 6 jeweils nur eine mit einer Profilierung versehen ist, während die andere gerade verläuft, und daß dabei die jeweils benachbart unmittelbar aufeinanderliegenden Bleche 2 in ihrer Ebene relativ zueinander um 180° verdreht angeordnet werden.To form a heating plate stack 1 constructed in this way, it is possible to use plates 2 in which only one of two parallel edge edges 6 is provided with a profile, while the other is straight, and that the plates 2 lying directly adjacent to one another in their The plane can be rotated relative to one another by 180 °.

Bleche 2, die wenigstens entlang einer ihrer Randkanten 6 keine oder eine weniger starke Profilierung aufweisen als auf ihrer gesamten übrigen Fläche, lassen sich durch Walzen, Drücken oder Prägen, also auf verschiedenen mechanischen Wegen herstellen. Dabei werden auf die längs der Randkanten 6 verlaufenden Zonen der Bleche 2 andere Verformungskräfte ausgeübt, als auf deren Mittelbereich, auf dem sich die Profilierungen 3 zur Eingrenzung der Strömungskanäle 4 befinden.Sheets 2, which have at least one or less of their profile along one of their peripheral edges 6 than on their entire remaining surface, can be produced by rolling, pressing or embossing, that is to say in various mechanical ways. In this case, 2 other zones are formed on the zones of the metal sheets running along the peripheral edges 6 Deforming forces exerted than on the central area on which the profiles 3 for delimiting the flow channels 4 are located.

Die Formgebung im Bereich der Randkanten 6 und die Herstellung der Profilierung 3 können gleichzeitig bzw. in einem Arbeitsgang durch entsprechende Gestaltung der Profilierwerkzeuge erfolgen, die sich in Form von Walzenpaaren oder aber Drück- bzw. Prägeplattenpaaren ausführen lassen.The shaping in the area of the marginal edges 6 and the production of the profiling 3 can be carried out simultaneously or in one work step by appropriately designing the profiling tools, which can be carried out in the form of pairs of rollers or pairs of pressure plates or embossing plates.

Möglich ist es aber auch, die längs der Randkanten 6 verlaufenden Zonen der Bleche 2 durch einen nachgeschalteten Arbeitsgang, also nach der bereits stattgefundenen Profilierung, im Sinne einer Profilabflachung nachzuwalzen, nachzudrücken oder nachzuprägen.However, it is also possible to reroll, repress or stamp the zones of the metal sheets 2 running along the edge edges 6 by means of a subsequent operation, that is to say after the profiling has already taken place, in the sense of a flattening of the profile.

Nach den Figuren 4 bis 6 ist als Vorrichtung zur Herstellung von Blechen 2 für den Aufbau von Heizblechpaketen 1 ein Walzenpaar 11 zu sehen, dessen Walzen 12 und 13 eine komplementär zueinander passende Profilierung ihres Ballenumfangs aufweisen.According to FIGS. 4 to 6, a pair of rollers 11, the rollers 12 and 13 of which have a complementary matching profile of their bale circumference, can be seen as a device for producing sheets 2 for the construction of heating plate packages 1.

Über den größten Teil 14 ihrer Ballenlänge haben dabei die beiden Walzen 12 und 13 des Walzenpaares 11 die die Profilierung 3 in Form von Ausprägungen erzeugende, mehr oder weniger unregelmäßige Anfangsgestaltung, wie das aus Figur 5 der Zeichnung ersichtlich ist.Over the major part 14 of their bale length, the two rollers 12 and 13 of the pair of rollers 11 have the more or less irregular initial configuration which produces the profile 3 in the form of features, as can be seen from FIG. 5 of the drawing.

Über den kleineren Teil 15 der Ballenlänge hinweg weisen hingegen die beiden Walzen 12 und 13 des Walzenpaares 11 gegeneinander abgestufte und über ihren Umfang hinweg kreisrunde Formgebungsflächen auf, wie das aus Figur 6 hervorgeht.On the other hand, over the smaller part 15 of the bale length, the two rollers 12 and 13 of the roller pair 11 have shaping surfaces which are stepped against one another and are circular over their circumference, as can be seen from FIG.

Mit Hilfe eines solchermaßen ausgelegten Walzenpaares 11 lassen sich in einem Arbeitsgang Bleche 2 herstellen, die lediglich längs einer zur Durchlaufrichtung parallelen Randkante 6 völlig eben gestaltet sind, während ihr übriger Flächenbereich mit der mehr oder weniger unregelmäßigen Profilierung 3 in Form von Ausprägungen ausgestattet ist.With the aid of a pair of rollers 11 designed in this way, sheets 2 can be produced in one operation, which are only completely flat along an edge 6 parallel to the direction of passage, while their remaining surface area with the more or less irregular profile 3 in the form of features.

Selbstverständlich ist es auch möglich, die Bleche 2 zunächst über ihre gesamte Breite hinweg durch ein Walzenpaar 11 hindurchzuführen, welches eine in Figur 5 angedeutete Ballenprofilierung der Einzelwalzen 12 und 13 hat. Anschließend läßt sich dann das Profilierte Blech 2 mit seiner einen Randkante 6 durch ein weiteres aber schmales Walzenpaar hindurchführen, dessen Walzen 12 und 13 eine glatte, kreisrunde Ballenform aufweist, um dadurch den Bereich der Randkante 6 im Sinne einer Profilabflachung nachzuwalzen.Of course, it is also possible to first guide the sheets 2 over their entire width through a pair of rolls 11, which has a bale profile of the individual rolls 12 and 13 indicated in FIG. 5. Then the profiled sheet 2 can be passed with its one edge 6 through a further but narrow pair of rollers, the rollers 12 and 13 of which have a smooth, circular bale shape, in order thereby to re-roll the area of the edge 6 in the sense of a profile flattening.

Während durch Benutzung von anhand der Figuren 4 bis 6 erläuterten Walzenpaaren Bleche 2 in einem kontinuierlichen Arbeitsgang bspw. durch Verarbeitung von Bandmaterial gefertigt werden können, lassen sich vorgefertigte Blechzuschnitte in äquivalenter Art und Weise, aber diskontinuierlich unter Benutzung von Drück- bzw. Prägeplatten-Paaren mit Hilfe von Pressen fertigen.While sheets 2 can be produced in one continuous operation, for example by processing strip material, by using pairs of rollers explained with reference to FIGS. 4 to 6, prefabricated sheet blanks can be produced in an equivalent manner, but discontinuously, using pairs of pressure plates or embossing plates manufacture with the help of presses.

In den Figuren 7 bis 10 der Zeichnung sind noch Möglichkeiten angedeutet, die die der Erfindung zugrundeliegende Aufgabe auch dadurch gelöst werden kann, daß die Profilierungshöhe der Bleche 2 wenigstens im Bereich ihrer Randkanten 6 gegenüber den übrigen Flächenbereichen reduziert wird.In FIGS. 7 to 10 of the drawing, options are also indicated that the object on which the invention is based can also be achieved in that the profiling height of the sheets 2 is reduced at least in the area of their peripheral edges 6 compared to the other surface areas.

Die Figur 7 läßt dabei erkennen, daß es möglich ist, die Profilierung 3 der Bleche 2 zu ihren Randkanten 6 hin beidseitig konvergierend auslaufen zu lassen, um im Bereich der Randkanten 6 den gewünschten Mindestabstand 8 zu erreichen. Figur 8 verdeutlicht hingegen, daß die gleiche Möglichkeit auch erreichbar ist, wenn die Profilierung 3 der Bleche 2 zur Randkante 6 hin einseitig konvergierend ausläuft.FIG. 7 shows that it is possible to allow the profiling 3 of the sheets 2 to converge on both sides towards their edge edges 6 in order to achieve the desired minimum distance 8 in the region of the edge edges 6. FIG. 8, on the other hand, illustrates that the same possibility can also be achieved if the profiling 3 of the sheets 2 ends on one side converging towards the edge 6.

Während in Figur 9 (vgl. Pfeil IX in Fig. 7 und 8) die maximale Profilierungshöhe 9 der Bleche 2 im seitlichen Abstand von ihren Randkanten 6 aufgezeigt wird, ergibt sich aus Figur 10 (vgl. Pfeil X in Fig. 7 und 8) deren reduzierte Profilierungshöhe 10 im Bereich ihrer Randkanten 6, durch welche wiederum der Mindestabstand 8 zwischen den Randkanten 6 zweier benachbart aufeinanderliegender Bleche 2 bestimmt wird.While in Figure 9 (see arrow IX in Figures 7 and 8) the maximum Profiling height 9 of the sheets 2 is shown at a lateral distance from their edge edges 6, results from Figure 10 (see arrow X in Fig. 7 and 8) their reduced profile height 10 in the area of their edge edges 6, which in turn, the minimum distance 8 between the Edge edges 6 of two sheets 2 lying next to one another are determined.

Für die Herstellung der nach den Figuren 7 bis 10 ausgestalteten Bleche 2 lassen sich Vorrichtungen einsetzen, die aus zwei von entgegengesetzten Seiten her auf das ebene Blech zur Einwirkung bringbaren Profilierwerkzeughälften bestehen. Die den Randkanten 6 der Bleche 2 zugeordneten Bereiche dieser Profilierwerkzeughälften müssen dabei zwischen sich unter Berücksichtigung der jeweils zu bearbeitenden Blechdicke ein den Figuren 7 oder 8 entsprechendes, konvergierendes Formgebungsprofil einschließen. Auch in diesem Falle können die Vorrichtung mit Walzenpaaren oder Drück. bzw. Prägeplatten-Paaren arbeiten, die entweder nur in einem Arbeitsgang oder aber in zwei einander nachgeschalteten Arbeitsgängen auf die Bleche 2 einwirken.For the production of the sheets 2 designed according to FIGS. 7 to 10, devices can be used which consist of two profiling tool halves which can be brought into action from opposite sides on the flat sheet metal. The areas of these profiling tool halves assigned to the edge edges 6 of the sheets 2 must include a converging shaping profile corresponding to FIGS. 7 or 8, taking into account the sheet thickness to be machined in each case. In this case too, the device can be fitted with pairs of rollers or presses. or pairs of embossing plates, which act on the sheets 2 either only in one work step or in two successive work steps.

Abschließend sei noch erwähnt, daß die Heizblechpakete 1 aus den Blechen 2 der Gruppen 2a und 2b so zusammengebaut werden, daß die den Minimalabstand 8 voneinander aufweisenden Randkanten 6 der Bleche 2 innerhalb des Wärmetauschers jeweils der An- und Abströmseite der Wärmetauschermedien zugewendet sind und folglich die Materialanhäufung der wulstartigen Verdickung ihrer Beschichtung 5 an Stellen zu liegen kommt, die einer besonders hohen Korrosionsgefahr ausgesetzt sind.Finally, it should also be mentioned that the heating plate packs 1 are assembled from the sheets 2 of groups 2a and 2b in such a way that the marginal edges 6 of the sheets 2, which have the minimum spacing 8 from one another, are turned towards the upstream and downstream sides of the heat exchanger media and consequently that Material accumulation of the bead-like thickening of its coating 5 comes to rest at locations which are exposed to a particularly high risk of corrosion.

Grundgedanke der vorstehend erläuterten Maßnahme ist die Schaffung emaillierter Heizbleche 2 mit abgeflachten Randzonen, die sich zu Heizblechpaketen 1 für Wärmetauscher zusammenstellen lassen. Dabei kommt es insbesondere auf folgende Maßnahmen an:

  • Alle oder ein bestimmter Anteil der Bleche 2 ist an den Randkanten 6 flacher als über die übrigen Flächenbereiche hinweg profiliert oder sogar geradlinieg bzw. glatt gestaltet.
  • Die flacher profilierten bzw. geraden oder glatten Randzonen der Bleche 2 sind im Heizblechpaket 1 jeweils der An- und Abströmseite zugewendet.
  • Die besonders gestalteten Randkanten 6 der Bleche 2 werden beim Profiliervorgang, bspw. mittels Profilierwalzen, durch entsprechende Gestaltung des Formgebungswerkzeuges, bspw. des Profilwalzen-Paares gebildet.
  • Die Profilhöhe der Bleche 2 wird durch eine konische Formgebung an den Enden der Profilierwerkzeuge zu den Randkanten 6 der Bleche hin konvergierend aus- oder umgeformt.
  • Flache bzw. gerade und glatte Randkanten 6 der Bleche 2 können mit Profilwalzen-Paaren hergestellt werden, die an ihren Enden glatte, ringförmige Abschnitte tragen.
  • Bei bspw. durch Walzen zunächst mit durchgehend gleichstarker Profilierung versehenen Blechen 2 wird ein weiterer Arbeitsgang nachgeschaltet, der den Bereich der Randkanten 6 der Bleche ganz oder teilweise wieder einebnet.
  • Die Randkanten 6 von zunächst durchgehend mit gleichmäßig starker Profilierung versehenen bereits auf Maß geschnittenen Bleche 2 werden mit Hilfe einer Presse eingeebnet.
The basic idea of the measure explained above is the creation of enamelled heating plates 2 with flattened edge zones, which can be put together to form heating plate packages 1 for heat exchangers. The following measures are particularly important:
  • All or a certain proportion of the sheets 2 is flatter at the edge edges 6 than profiled over the remaining surface areas or even designed to be straight or smooth.
  • The flatter profiled or straight or smooth edge zones of the sheets 2 face the inflow and outflow sides in the heating sheet pack 1.
  • The specially designed edge edges 6 of the sheets 2 are formed during the profiling process, for example by means of profiling rollers, by appropriate design of the shaping tool, for example the pair of profiling rollers.
  • The profile height of the sheets 2 is shaped or shaped to converge towards the edge edges 6 of the sheets by a conical shape at the ends of the profiling tools.
  • Flat or straight and smooth marginal edges 6 of the sheets 2 can be produced with pairs of profiled rollers which have smooth, annular sections at their ends.
  • In the case of sheets 2, for example, which are initially provided with a uniformly strong profiling by rolling, a further working step is followed, which completely or partially levels out the area of the edge edges 6 of the sheets.
  • The marginal edges 6 of sheets 2 which have already been provided with a uniformly strong profiling and are cut to size are leveled with the aid of a press.

Claims (14)

  1. Pack of heat-transfer plates (1) for regenerative heat exchangers, the pack comprising a plurality of flow channels (4) situated one on top of the other between plates (2 or 2a, 2b) which do not interfere with each other and are at least partly profiled, e.g. provided with stampings (3), the plates carrying a coating (5), e.g. an enamelled layer, serving for surface protection, characterised in that at least the edge portions (6) of the plates (2 or 2a, 2b) which are adjacent and situated directly one on top of the other are spaced from each other across their whole area by a minimum distance (8) or extend with respect to each other without contact.
  2. Pack of heat-transfer plates according to claim 1, characterised in that the minimum distance (8) between the edge portions (6) of the plates (2 or 2a, 2b) is greater than the thickness of the coating (5 and 7) on the lateral areas of these edge portions (6) facing each other.
  3. Pack of heat-transfer plates according to any one of claims 1 and 2, characterised in that the height of the profiling (e.g. 10; Figure 10) of the plates (2 or 2a, 2b), at least in the region of their edge portions (6), is reduced compared with the height of profiling (e.g. 9; Figure 9) of their other areas.
  4. Pack of heat-transfer plates according to any one of claims 1 to 3, characterised in that of two adjacent plates (2 or 2a, 2b) situated directly one on top of the other only one (2a) has a profiled edge portion, whereas the edge portion (6) of the other plate (2 or 2b) is straight (Figure 1).
  5. Pack of heat-transfer plates according to any one of claims 1 to 4, characterised in that of two parallel edge portions of a plate (2 or 2a, 2b) only one edge portion is provided with profiling, whereas the other edge portion (6) is straight, and that the planes of the adjacent plates (2 or 2a, 2b) situated directly one on top of the other are turned through 180° relative to each other (Figure 2).
  6. Pack of heat-transfer plates according to any one of claims 1 to 5, characterised in that the edge portions of the plates (2 or 2a, 2b) spaced from each other by the minimum distance (8) face the inflow and outflow side of the heat exchanger.
  7. Process for the manufacture of profiled plates (2 or 2a, 2b) for packs of heat-transfer plates (1) according to one or more of claims 1 to 6 by shaping by rolling, pressing or stamping of flat plates, characterised in that on the regions of the plates (2 or 2a, 2b), extending along the edge portions (6), are exerted, in the sense of profile flattening or reduction, other deforming forces than on the remaining areas.
  8. Process according to claim 7, characterised in that the regions, extending along the edge portions (6), of the plates (2 or 2a, 2b) provided with the profiling (3) are subsequently rolled, pressed or stamped.
  9. Apparatus for carrying out the process according to claim 7, comprising two profiling tool halves (12 and 13) which can be brought to act from opposite sides onto the straight plate, characterised in that [at the] associated regions (15) above the edge portions (6) of the plates (2 or 2a, 2b) the profiling tool halves (12 and 13) delimit between themselves a stepwise offset or converging forming profile (Figures 4 to 6).
  10. Apparatus according to claim 9, characterised in that roller pairs (11) or pairs of pressing or stamping plates having end portions or edge portions which are stepwise offset or gently inclined with respect to their main working plane are used as the profiling tool halves (12, 13) (Figures 4 to 6).
  11. Apparatus according to claim 10, characterised in that the rollers (12 and 13) of the pair (11) of profiling rollers are provided at one of their ends with smooth-roller portions which are annularly offset with respect to their profiling-roller portion (14) (Figures 4 to 6).
  12. Apparatus for carrying out the process according to claim 8 comprising two profiling tool halves (12 and 13) which can be brought to act from opposite sides onto the straight plate (2 or 2a, 2b), characterised by two reforming tool halves which can also be brought to act from opposite sides onto the plate (2 or 2a, 2b) which has already been provided with profilings (3), the tool halves serving to act onto narrow edge regions adjacent the edge regions (6) of the plates (2 or 2a, 2b).
  13. Apparatus according to claim 12, characterised in that roller pairs or pairs of pressing or stamping plates having forming areas which are offset and smooth or gently inclined and profiled with respect to the preceding profiling tool halves are used as re-forming tool halves.
  14. Apparatus according to claim 13, characterised in that the rollers of the re-forming roller pair have the form of smooth rollers.
EP92110722A 1991-07-11 1992-06-25 Pack of heat transfer plates for regenerative heat exchanger as well as process and apparatus for making profiled plates for this pack Expired - Lifetime EP0522360B1 (en)

Applications Claiming Priority (2)

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DE4122949 1991-07-11
DE4122949A DE4122949A1 (en) 1991-07-11 1991-07-11 HEATING SHEET PACKAGE FOR REGENERATIVE HEAT EXCHANGER AND METHOD AND DEVICE FOR PRODUCING PROFILE SHEETS FOR SUCH HEATING SHEET PACKAGES

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EP0522360A3 EP0522360A3 (en) 1993-04-28
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Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316978C2 (en) * 1993-05-21 1996-08-14 Thale Eisen Huettenwerk Rod, plate or shell-shaped components enamelled on both sides over one or more edges
DE19528634A1 (en) 1995-08-04 1997-02-06 Rothemuehle Brandt Kritzler Heating plate package for regenerative heat exchangers
US6079481A (en) * 1997-01-23 2000-06-27 Ail Research, Inc Thermal storage system
US5979050A (en) * 1997-06-13 1999-11-09 Abb Air Preheater, Inc. Air preheater heat transfer elements and method of manufacture
FR2771802B1 (en) 1997-12-02 2000-01-28 Dietrich & Cie De ENAMELLED AND SUBSTANTIALLY FLAT METAL HEAT EXCHANGER
DE19940627A1 (en) 1999-08-27 2001-03-01 Abb Patent Gmbh Heating element for a regenerative heat exchanger and method for producing a heating element
DE10320462B3 (en) * 2003-05-08 2005-03-03 Alstom Power Energy Recovery Gmbh Heating element for a regenerative heat exchanger and method for producing a heating element
DE102006003317B4 (en) 2006-01-23 2008-10-02 Alstom Technology Ltd. Tube bundle heat exchanger
US9557119B2 (en) 2009-05-08 2017-01-31 Arvos Inc. Heat transfer sheet for rotary regenerative heat exchanger
US8622115B2 (en) * 2009-08-19 2014-01-07 Alstom Technology Ltd Heat transfer element for a rotary regenerative heat exchanger
US9200853B2 (en) 2012-08-23 2015-12-01 Arvos Technology Limited Heat transfer assembly for rotary regenerative preheater
US10175006B2 (en) 2013-11-25 2019-01-08 Arvos Ljungstrom Llc Heat transfer elements for a closed channel rotary regenerative air preheater
US10094626B2 (en) 2015-10-07 2018-10-09 Arvos Ljungstrom Llc Alternating notch configuration for spacing heat transfer sheets
RU2712695C1 (en) * 2019-01-10 2020-01-30 Акционерное общество "Корпорация "Росхимзащита" Method of manufacturing a block regenerative product

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262490A (en) * 1954-04-21 1966-07-26 Chrysler Corp Process for joining metallic surfaces and products made thereby
US2983486A (en) * 1958-09-15 1961-05-09 Air Preheater Element arrangement for a regenerative heat exchanger
GB992413A (en) * 1961-05-25 1965-05-19 Howden James & Co Ltd Improvements relating to rotary regenerative air preheaters for boiler plant
US4449573A (en) * 1969-06-16 1984-05-22 Svenska Rotor Maskiner Aktiebolag Regenerative heat exchangers
GB1439674A (en) * 1973-11-24 1976-06-16 Central Electr Generat Board Matrix for regenerative heat exchangers
DE2616816C3 (en) * 1976-04-15 1983-12-01 Apparatebau Rothemühle Brandt + Kritzler GmbH, 5963 Wenden Heating plate package for regenerative heat exchangers
GB2183811A (en) * 1986-09-12 1987-06-10 Howden James & Co Ltd Rotary regenerative heat exchanger

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ES2084879T3 (en) 1996-05-16
EP0522360A3 (en) 1993-04-28
JPH05231791A (en) 1993-09-07
EP0522360A2 (en) 1993-01-13
US5314006A (en) 1994-05-24
RU2080538C1 (en) 1997-05-27
DE59205443D1 (en) 1996-04-04
DE4122949A1 (en) 1993-01-14

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