EP1882892A1 - Spiral heat exchanger and method for its production - Google Patents

Spiral heat exchanger and method for its production Download PDF

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Publication number
EP1882892A1
EP1882892A1 EP07111991A EP07111991A EP1882892A1 EP 1882892 A1 EP1882892 A1 EP 1882892A1 EP 07111991 A EP07111991 A EP 07111991A EP 07111991 A EP07111991 A EP 07111991A EP 1882892 A1 EP1882892 A1 EP 1882892A1
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EP
European Patent Office
Prior art keywords
tube
seal
groove
heat exchanger
spiral
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Granted
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EP07111991A
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German (de)
French (fr)
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EP1882892B1 (en
Inventor
Christian Bayer
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Econicsystems Innovative Kuehllosungen Gesmbh
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Econicsystems Innovative Kuehllosungen Gesmbh
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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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/026—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled and formed by bent members, e.g. plates, the coils having a cylindrical configuration
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/103—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of more than two coaxial conduits or modules of more than two coaxial conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media

Definitions

  • the invention relates to a spiral heat exchanger according to the preamble of claim 1 and to a method for its production.
  • a heat transfer medium flows through a spiral channel located between the two tubes and defined by the gasket.
  • the spiral flow improves the heat transfer.
  • a tube is provided in the manner of a thread with a spirally extending rib which serves as a seal and, in conjunction with the lateral surfaces of the tubes pushed into each other, defines a spiral channel through which a heat transfer medium flows.
  • the aim of the invention is to avoid these disadvantages and to propose a heat exchanger of the type mentioned, the items can be easily manufactured and can also be assembled very easily.
  • the proposed measures has the advantage that the grooves can be easily made on a lathe or with correspondingly small wall thickness of the tubes by pressing the grooves.
  • the seal can be made of a plastic depending on the expected loads. However, preferred is spring steel, in this case can be used commercially at very low prices available coil springs.
  • Another object of the invention is to provide a method for assembling a spiral heat exchanger according to the invention, which allows a very simple and rapid assembly.
  • FIG. 1 shows a view of the inner tube of the heat exchanger
  • Fig. 2 is a longitudinal section of the tube of the heat exchanger surrounding the inner tube taken along the line A-A in Fig. 3
  • Fig. 4 is a view of an assembled heat exchanger according to the invention
  • FIG. 5 shows a longitudinal section through the heat exchanger according to FIG. 4 along the line B-B
  • FIG. 6 shows a detail of the heat exchanger according to FIGS. 4 and 5
  • FIG. 7 schematically shows the assembly of a heat exchanger according to FIGS. 4 and 5.
  • the heat exchanger according to the invention according to FIGS. 4 and 5 has an inner tube 1 (see FIG. 1), which is provided on its outer lateral surface 2 with a spiral groove 3.
  • the inner tube 1 is surrounded over most of its length by a tube 5 (see Fig. 5).
  • This tube 5 has on its inner circumferential surface 6 a spiral groove 7 (see Fig. 2).
  • the groove 7 has the same pitch as the groove 3 of the inner tube 1.
  • sealing caps 4 are attached (eg, welded), which allow a connection of connecting pipes, not shown (see Figs. 1 and 2). These connection pipes then communicate with the duct between the inner pipe 1 and the pipe 5 (see FIG. 2), so that a heat transfer medium can be passed through this duct.
  • a seal 9 is provided, which in one of the two grooves 3 and 7, e.g. - As shown in Figure 5 -.
  • the groove 7 of the tube 5 is inserted and under pressure against the outer surface of the other tube, for. on the lateral surface 2 of the inner tube. 1
  • the tube 5 has on its outer circumferential surface 10 (see FIG. 3) a further spiral groove 11.
  • This tube 5 is surrounded over the greater part of its length by a further tube 5 '(see FIGS. 4 and 5), which is provided on its inner circumferential surface 6' (see FIG. 2) with a further groove 7 '.
  • This groove 7 ' has the same pitch as the groove 11 in the outer circumferential surface 10 of the tube fifth
  • the tube 5 ' is surrounded by an outer tube 12 which is provided on its inner circumferential surface 13 with a further groove 14.
  • This groove 14 has substantially the same pitch as the groove 11 'in the outer circumferential surface 10' of the tube 5 '.
  • Sealing caps 4 ' are attached to the ends of the tube 5', and sealing caps 4 "are also attached to the ends of the outer tube 12.
  • a heat transfer medium can be fed into the spiral channel 8 'or 8" or (at the other End) are removed from this.
  • the groove 7 receiving the seal 9 has a smaller radius than the seal 9 in cross-section. This results in two sealing edges, through which a high degree of tightness is achieved.
  • the seal is under pressure further at the Lateral surface 2 of the tube 1 at. This results in a corresponding deformation of the seal.
  • Fig. 7 shows schematically the assembly of a heat exchanger.
  • a gasket 9 e.g. may be made of spring steel, inserted into the groove 3 of the inner tube 1 and the inner tube 1 is screwed into the tube 5. This is easily possible because when held in the groove 3 seal 9 a slight clearance between this and the corresponding groove 7 of the associated tube 5 remains.
  • the two tubes 1 and 5 are displaced in the axial direction against each other. This can e.g. done by means of a press.
  • Typical dimensions are: length of the pipes 1.5 m. Diameter of the wire of the seal: 3 mm. Depth of grooves: 0.3 mm. Difference between outer diameter of one pipe and inner diameter of the next pipe: 2.7 mm. This results in a distance from the groove bottom of the inner tube to the groove bottom of the next tube of 3.3 mm, which theoretically means a clearance of 0.3 mm.
  • this game is not fully available because of the smaller radii of the grooves compared to the radius of the spring wire, i. the seal can not reach the groove bottom (see Fig. 6).
  • the distance between the groove bottom and the surface of the other tube is exactly 3 mm, i. Theoretically, there is no pressure if the seal lies in one groove and the other pipe is displaced. But since, as I said, the seal can not reach the groove bottom (see again Fig. 6), there is still a pressure.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The heat exchanger has an inner pipe (1) provided with a spirally running flute on an outer shell surface (2). A pipe (5) is provided with a spiral flute (7) on an inner shell surface (6). The spiral flute (7) exhibits a same pitch like that of the former flute. An elastic deformable seal (9) is held in the flute of one of the pipes (1, 5), where the seal lies on the shell surface of the other pipe sealingly and under pressing. The two flutes are shifted against each other axially. The seal is made of spring steel, where the seal engages in the flute (7) with a play. An independent claim is also included for a method for assembling a spiral heat exchanger.

Description

Technisches GebietTechnical area

Die Erfindung bezieht sich auf einen Spiral-Wärmeübertrager gemäß dem Oberbegriff des Anspruchs 1 sowie auf ein Verfahren zu seiner Herstellung.The invention relates to a spiral heat exchanger according to the preamble of claim 1 and to a method for its production.

Stand der TechnikState of the art

Bei solchen Spiral-Wärmeübertragern durchströmt ein Wärmeübertragermedium einen zwischen den beiden Rohren liegenden und durch die Dichtung bestimmten spiralförmig verlaufenden Kanal. Durch die spiralförmige Strömung wird der Wärmeübergang verbessert.In such spiral heat exchangers, a heat transfer medium flows through a spiral channel located between the two tubes and defined by the gasket. The spiral flow improves the heat transfer.

Bei bekannten derartigen Wärmeübertragern ist ein Rohr nach Art eines Gewindeganges mit einer spiralförmig verlaufenden Rippe versehen, die als Dichtung dient und in Verbindung mit den Mantelflächen der ineinander geschobenen Rohre einen spiralförmig verlaufenden Kanal bestimmt, durch den ein Wärmeübertragungs-Medium strömt. Dabei ergibt sich jedoch der Nachteil, dass die Herstellung der Einzelteile eines solchen Wärmeübertragers einen sehr erheblichen Fertigungsaufwand erfordert, und auch der Zusammenbau eines Wärmeübertragers erfordert einen hohen Aufwand. So wird es in den meisten Fällen erforderlich sein, die beiden Rohre auf stark unterschiedliche Temperaturen zu bringen, um sie ineinander schieben zu können und bei im Wesentlichen gleichem Temperaturniveau der beiden Rohre ein dichtendes Anpressen der spiralförmigen Rippe an der entsprechenden Mantelfläche des jeweils anderen Rohres sicherzustellen.In known heat exchangers of this type, a tube is provided in the manner of a thread with a spirally extending rib which serves as a seal and, in conjunction with the lateral surfaces of the tubes pushed into each other, defines a spiral channel through which a heat transfer medium flows. However, there is the disadvantage that the production of the items of such a heat exchanger requires a very considerable manufacturing effort, and also the assembly of a heat exchanger requires a lot of effort. Thus, in most cases, it will be necessary to bring the two tubes to greatly different temperatures in order to push them into each other and ensure a sealing pressing of the spiral rib on the corresponding lateral surface of the other tube at substantially the same temperature level of the two tubes ,

Darstellung der ErfindungPresentation of the invention

Ziel der Erfindung ist es, diese Nachteile zu vermeiden und einen Wärmeübertrager der eingangs erwähnten Art vorzuschlagen, dessen Einzelteile sich einfach herstellen lassen und der auch sehr einfach zusammengebaut werden kann.The aim of the invention is to avoid these disadvantages and to propose a heat exchanger of the type mentioned, the items can be easily manufactured and can also be assembled very easily.

Erfindungsgemäß wird dies bei einem Wärmeübertrager der eingangs erwähnten Art durch die kennzeichnenden Merkmale des Anspruchs 1 erreicht. Solch ein Wärmeübertrager lässt sich ganz einfach gemäß den Ansprüchen 7 oder 8 herstellen.According to the invention this is achieved in a heat exchanger of the type mentioned by the characterizing features of claim 1. Such a heat exchanger can be easily according to the Claims 7 or 8 produce.

Durch die vorgeschlagenen Maßnahmen ergibt sich der Vorteil, dass die Nuten einfach auf einer Drehbank oder bei entsprechend geringer Wandstärke der Rohre durch Drücken der Nuten hergestellt werden können. Die Dichtung kann je nach den zu erwartenden Belastungen aus einem Kunststoff hergestellt werden. Bevorzugt ist jedoch Federstahl, in diesem Fall kann man im Handel zu sehr günstigen Preisen erhältliche Spiralfedern einsetzen.The proposed measures has the advantage that the grooves can be easily made on a lathe or with correspondingly small wall thickness of the tubes by pressing the grooves. The seal can be made of a plastic depending on the expected loads. However, preferred is spring steel, in this case can be used commercially at very low prices available coil springs.

Durch die Merkmale der Ansprüche 2 und 3 ergibt sich der Vorteil, dass solche Wärmeübertrager nicht nur zur Übernahme oder Abgabe von Wärme von einem Wärmeübertragermedium, wie z.B. Wasser, von oder an die Umgebung verwendet werden können, sondern auch zum Übertragen von Wärme von einem Medium zu einem anderen, die in den Kanälen zwischen dem Innenrohr und dem Rohr bzw. diesem und dem nächsten Rohr strömen.By the features of claims 2 and 3, there is the advantage that such heat exchangers are not only for the absorption or release of heat from a heat transfer medium, such. Water can be used to or from the environment, but also for transferring heat from one medium to another, which flow in the channels between the inner tube and the tube and this and the next tube.

Um auf einfache Weise ein hohes Maß an Dichtheit der einzelnen Kanäle zu erreichen, ist es vorteilhaft, die Merkmale des Anspruchs 4 vorzusehen. Auf diese Weise drücken sich nämlich die Kanten der Nuten in die Dichtung.In order to achieve a high degree of tightness of the individual channels in a simple manner, it is advantageous to provide the features of claim 4. In this way, namely, the edges of the grooves press into the seal.

Um einen einfachen Zusammenbau eines erfindungsgemäßen Wärmeübertragers zu ermöglichen, ist es zweckmäßig, die Merkmale des Anspruchs 5 vorzusehen. So lässt sich der Wärmeübertrager mit geringem Kraftaufwand zusammenschrauben.In order to enable a simple assembly of a heat exchanger according to the invention, it is expedient to provide the features of claim 5. Thus, the heat exchanger can be screwed together with little effort.

Um einen robusten Aufbau des Wärmeübertragers zu ermöglichen, ist es vorteilhaft, die Merkmale des Anspruchs 6 vorzusehen.In order to enable a robust construction of the heat exchanger, it is advantageous to provide the features of claim 6.

Ein weiteres Ziel der Erfindung ist es, ein Verfahren zum Zusammenbau eines erfindungsgemäßen Spiral-Wärmeübertragers anzugeben, das einen sehr einfachen und raschen Zusammenbau ermöglicht.Another object of the invention is to provide a method for assembling a spiral heat exchanger according to the invention, which allows a very simple and rapid assembly.

Erfindungsgemäß wird dies durch die Merkmale des Anspruchs 7 oder 8 erreicht.This is achieved by the features of claim 7 or 8 according to the invention.

Dabei genügt es, auf das Innenrohr eine Dichtung aufzubringen und diese in die Nut des Innenrohres einzulegen. Danach kann das dieses Innenrohr umgebende Rohr einfach auf das erstere aufgeschraubt werden. Dies kann sehr einfach erfolgen, wenn ein kleines Spiel zwischen der Dichtung und dem Grund der Nut des auf- oder einzuschraubenden Rohres vorgesehen ist. Die Abdichtung des jeweiligen zwischen zwei Rohren verlaufenden Kanals erfolgt einfach dadurch, dass die beiden Rohre gegeneinander verschoben werden. Dabei gleitet die Dichtung aus einer der beiden Nuten heraus und presst sich daher an die Mantelfläche des anderen Rohres an, wodurch ein hohes Maß an Dichtheit erreicht wird.It is sufficient to apply a seal on the inner tube and insert it into the groove of the inner tube. Thereafter, the tube surrounding this inner tube can be simply screwed onto the former. This can be done very easily if a small clearance between the seal and the bottom of the groove of the pipe to be screwed or screwed is provided. The sealing of the respective channel extending between two tubes is carried out simply by moving the two tubes against each other. In this case, the seal slides out of one of the two grooves and therefore presses against the outer surface of the other tube, whereby a high degree of tightness is achieved.

Grundsätzlich kann man die Dichtung auch gemäß Anspruch 8 zunächst in das äußere Rohr einschrauben. Dabei erkennt man aber nicht so leicht, ob die Dichtung zur Gänze in der Nut liegt. Außerdem neigt die Dichtung dazu, ihren Durchmesser beim Aufschrauben etwas zu vergrößern, sodass sie leichter klemmt, wenn man sie in ein äußeres Rohr einschraubt als wenn man sie auf ein inneres Rohr aufschraubt.Basically, you can screw the seal according to claim 8 first in the outer tube. However, it is not so easy to see if the seal is completely in the groove. In addition, the gasket tends to increase its diameter somewhat when screwed on so that it is easier to pinch when screwed into an outer tube than when screwed onto an inner tube.

Kurze Beschreibung der Abbildungen der ZeichnungenBrief description of the drawings

Die Erfindung wird nun anhand der Zeichnungen näher erläutert. Es zeigt: Fig. 1 eine Ansicht des Innenrohres des Wärmeübertragers; Fig. 2 einen Längsschnitt des Rohrs des Wärmeübertragers, das das Innenrohr umgibt, entlang der Linie A-A in Fig. 3; Fig. 3 dieses Rohr in Ansicht; Fig. 4 eine Ansicht eines zusammengebauten erfindungsgemäßen Wärmeübertragers; Fig. 5 einen Längsschnitt durch den Wärmeübertrager nach Fig. 4 entlang der Linie B-B; Fig. 6 ein Detail des Wärmeübertragers nach Fig. 4 und 5; und Fig. 7 schematisch den Zusammenbau eines Wärmeübertragers nach Fig. 4 und 5.The invention will now be explained in more detail with reference to the drawings. 1 shows a view of the inner tube of the heat exchanger; Fig. 2 is a longitudinal section of the tube of the heat exchanger surrounding the inner tube taken along the line A-A in Fig. 3; Fig. 3 of this tube in view; Fig. 4 is a view of an assembled heat exchanger according to the invention; FIG. 5 shows a longitudinal section through the heat exchanger according to FIG. 4 along the line B-B; FIG. FIG. 6 shows a detail of the heat exchanger according to FIGS. 4 and 5; and FIG. 7 schematically shows the assembly of a heat exchanger according to FIGS. 4 and 5.

Bester Weg zur Ausführung der ErfindungBest way to carry out the invention

Der erfindungsgemäße Wärmeübertrager gemäß Fig. 4 und 5 weist ein Innenrohr 1 auf (siehe Fig. 1), das an seiner äußeren Mantelfläche 2 mit einer spiralförmig verlaufenden Nut 3 versehen ist. Das Innenrohr 1 ist über den größten Teil seiner Länge von einem Rohr 5 umgeben (siehe Fig. 5). Dieses Rohr 5 weist an dessen inneren Mantelfläche 6 eine spiralförmig verlaufende Nut 7 auf (siehe Fig. 2). Dabei weist die Nut 7 die gleiche Ganghöhe wie die Nut 3 des Innenrohres 1 auf. An den beiden Enden des Rohrs 5 sind Dichtkappen 4 angebracht (z.B. angeschweißt), die einen Anschluss von nicht dargestellten Anschlussrohren ermöglichen (siehe Fig. 1 und 2). Diese Anschlussrohre stehen dann mit dem Kanal zwischen dem Innenrohr 1 und dem Rohr 5 in Verbindung (siehe Fig. 2), sodass ein Wärmeträgermedium durch diesen Kanal geleitet werden kann.The heat exchanger according to the invention according to FIGS. 4 and 5 has an inner tube 1 (see FIG. 1), which is provided on its outer lateral surface 2 with a spiral groove 3. The inner tube 1 is surrounded over most of its length by a tube 5 (see Fig. 5). This tube 5 has on its inner circumferential surface 6 a spiral groove 7 (see Fig. 2). In this case, the groove 7 has the same pitch as the groove 3 of the inner tube 1. At the two ends of the tube 5 sealing caps 4 are attached (eg, welded), which allow a connection of connecting pipes, not shown (see Figs. 1 and 2). These connection pipes then communicate with the duct between the inner pipe 1 and the pipe 5 (see FIG. 2), so that a heat transfer medium can be passed through this duct.

Zur Festlegung eines spiralförmigen Kanals 8 zwischen dem Innenrohr 1 und dem Rohr 5 ist eine Dichtung 9 vorgesehen, die in einer der beiden Nuten 3 und 7, z.B. - wie in Fig. 5 dargestellt - in der Nut 7 des Rohres 5, eingelegt ist und unter Pressung an der Mantelfläche des anderen Rohres anliegt, z.B. an der Mantelfläche 2 des Innenrohres 1.To define a helical channel 8 between the inner tube 1 and the tube 5, a seal 9 is provided, which in one of the two grooves 3 and 7, e.g. - As shown in Figure 5 -. In the groove 7 of the tube 5, is inserted and under pressure against the outer surface of the other tube, for. on the lateral surface 2 of the inner tube. 1

Das Rohr 5 weist an seiner äußeren Mantelfläche 10 (siehe Fig. 3) eine weitere spiralförmige Nut 11 auf. Dieses Rohr 5 ist über den größten Teil seiner Länge von einem weiteren Rohr 5' umgeben (siehe Fig. 4 und 5), das an seiner inneren Mantelfläche 6' (siehe Fig. 2) mit einer weiteren Nut 7' versehen ist. Diese Nut 7' weist die gleiche Ganghöhe auf wie die Nut 11 in der äußeren Mantelfläche 10 des Rohrs 5.The tube 5 has on its outer circumferential surface 10 (see FIG. 3) a further spiral groove 11. This tube 5 is surrounded over the greater part of its length by a further tube 5 '(see FIGS. 4 and 5), which is provided on its inner circumferential surface 6' (see FIG. 2) with a further groove 7 '. This groove 7 'has the same pitch as the groove 11 in the outer circumferential surface 10 of the tube fifth

Zwischen den Rohren 5 und 5' ist eine weitere spiralförmige Dichtung 9' eingelegt, die in einer der Nuten 7', 11 gehalten ist. Dadurch wird ein weiterer spiralförmiger Kanal 8' gebildet.Between the tubes 5 and 5 ', a further spiral-shaped seal 9' is inserted, which is held in one of the grooves 7 ', 11. As a result, a further spiral channel 8 'is formed.

Das Rohr 5' ist von einem Außenrohr 12 umgeben, das an seiner inneren Mantelfläche 13 mit einer weiteren Nut 14 versehen ist. Diese Nut 14 weist im Wesentlichen die gleiche Ganghöhe wie die Nut 11' in der äußeren Mantelfläche 10' des Rohres 5' auf.The tube 5 'is surrounded by an outer tube 12 which is provided on its inner circumferential surface 13 with a further groove 14. This groove 14 has substantially the same pitch as the groove 11 'in the outer circumferential surface 10' of the tube 5 '.

Zwischen dem Rohr 5' und dem Außenrohr 12 ist eine weitere spiralförmige Dichtung 9" eingelegt, die in einer der Nuten 11', 14 gehalten ist. Dadurch wird ein dritter spiralförmiger Kanal 8" bestimmt.Between the tube 5 'and the outer tube 12 there is inserted a further spiral-shaped seal 9 ", which is held in one of the grooves 11', 14. As a result, a third spiral-shaped channel 8" is determined.

An den Enden des Rohres 5' sind Dichtkappen 4' angebracht, und an den Enden des Außenrohres 12 sind ebenfalls Dichtkappen 4" angebracht. Durch entsprechende Rohrleitungen kann daher ein Wärmeträgermedium in den spiralförmigen Kanal 8' bzw. 8" zugeführt bzw. (am anderen Ende) aus diesem abgeführt werden.Sealing caps 4 'are attached to the ends of the tube 5', and sealing caps 4 "are also attached to the ends of the outer tube 12. By means of corresponding pipelines, therefore, a heat transfer medium can be fed into the spiral channel 8 'or 8" or (at the other End) are removed from this.

Wie aus Fig. 6 zu erkennen ist, weist die die Dichtung 9 aufnehmende Nut 7 im Querschnitt einen kleineren Radius als die Dichtung 9 auf. Dadurch ergeben sich zwei Dichtkanten, durch die ein hohes Maß an Dichtheit erreicht wird. Dabei liegt die Dichtung unter Pressung weiters an der Mantelfläche 2 des Rohres 1 an. Dabei kommt es zu einer entsprechenden Verformung der Dichtung 9.As can be seen from FIG. 6, the groove 7 receiving the seal 9 has a smaller radius than the seal 9 in cross-section. This results in two sealing edges, through which a high degree of tightness is achieved. The seal is under pressure further at the Lateral surface 2 of the tube 1 at. This results in a corresponding deformation of the seal. 9

Fig. 7 zeigt schematisch den Zusammenbau eines Wärmeübertragers. Dabei wird eine Dichtung 9, die z.B. aus Federstahl hergestellt sein kann, in die Nut 3 des Innenrohres 1 eingelegt und das Innenrohr 1 in das Rohr 5 eingeschraubt. Dies ist leicht möglich, da bei in der Nut 3 gehaltener Dichtung 9 ein geringes Spiel zwischen dieser und der entsprechenden Nut 7 des zugeordneten Rohres 5 verbleibt. Zur Herstellung der Abdichtung werden die beiden Rohre 1 und 5 in axialer Richtung gegeneinander verschoben. Dies kann z.B. mittels einer Presse erfolgen.Fig. 7 shows schematically the assembly of a heat exchanger. Thereby a gasket 9, e.g. may be made of spring steel, inserted into the groove 3 of the inner tube 1 and the inner tube 1 is screwed into the tube 5. This is easily possible because when held in the groove 3 seal 9 a slight clearance between this and the corresponding groove 7 of the associated tube 5 remains. To produce the seal, the two tubes 1 and 5 are displaced in the axial direction against each other. This can e.g. done by means of a press.

Versuche haben bestätigt, dass dabei die Dichtung 9 immer in einer der beiden Nuten verbleibt und nur aus der anderen Nut herauskommt. Die Dichtheit ist über die gesamte Länge in hervorragender Weise gegeben.Experiments have confirmed that the seal 9 always remains in one of the two grooves and only comes out of the other groove. The tightness is given over the entire length in an excellent way.

Typische Maße sind: Länge der Rohre 1,5 m. Durchmesser des Drahtes der Dichtung: 3 mm. Tiefe der Nuten: 0,3 mm. Unterschied zwischen Außendurchmesser eines Rohres und Innendurchmesser des nächsten Rohres: 2,7 mm. Damit ergibt sich ein Abstand vom Nutengrund des inneren Rohres zum Nutengrund des nächsten Rohres von 3,3 mm, was theoretisch ein Spiel von 0,3 mm bedeutet. Dieses Spiel steht aber wegen der geringeren Radien der Nuten im Vergleich zum Radius des Federdrahtes nicht zur Gänze zur Verfügung, d.h. die Dichtung kann den Nutengrund nicht erreichen (siehe Fig. 6). Der Abstand zwischen dem Nutengrund und der Oberfläche des anderen Rohres beträgt genau 3 mm, d.h. theoretisch liegt keine Pressung vor, wenn die Dichtung in einer Nut liegt und das andere Rohr verschoben ist. Da aber wie gesagt die Dichtung den Nutengrund nicht erreichen kann (siehe nochmals Fig. 6), liegt dennoch eine Pressung vor.Typical dimensions are: length of the pipes 1.5 m. Diameter of the wire of the seal: 3 mm. Depth of grooves: 0.3 mm. Difference between outer diameter of one pipe and inner diameter of the next pipe: 2.7 mm. This results in a distance from the groove bottom of the inner tube to the groove bottom of the next tube of 3.3 mm, which theoretically means a clearance of 0.3 mm. However, this game is not fully available because of the smaller radii of the grooves compared to the radius of the spring wire, i. the seal can not reach the groove bottom (see Fig. 6). The distance between the groove bottom and the surface of the other tube is exactly 3 mm, i. Theoretically, there is no pressure if the seal lies in one groove and the other pipe is displaced. But since, as I said, the seal can not reach the groove bottom (see again Fig. 6), there is still a pressure.

Claims (8)

Spiral-Wärmeübertrager mit einem Innenrohr (1), das in einem Rohr (5) konzentrisch eingesetzt ist, wobei zwischen dem Innenrohr (1) und dem Rohr (5) eine spiralförmig verlaufende Dichtung (9) angeordnet ist, sodass ein spiralförmiger Strömungskanal gebildet wird, dadurch gekennzeichnet, dass das Innenrohr (1) an seiner äußeren Mantelfläche (2) mit einer spiralförmig verlaufenden Nut (3) versehen ist und das Rohr (5) an seiner inneren Mantelfläche (6) mit einer spiralförmigen Nut (7) versehen ist, die im Wesentlichen die gleiche Ganghöhe wie die Nut (3) des Innenrohres (1) aufweist, dass in der Nut (3, 7) eines dieser Teile (1, 5) eine elastisch verformbare Dichtung (9) gehalten ist, die an der Mantelfläche (2, 6) des jeweils anderen Rohres (1, 5) dichtend und unter Pressung anliegt, wobei die Nuten (3, 7) der beiden Rohre (1, 5) gegeneinander axial verschoben sind.Spiral heat exchanger with an inner tube (1), which is inserted concentrically in a tube (5), wherein between the inner tube (1) and the tube (5) a spirally extending seal (9) is arranged so that a spiral flow channel is formed , characterized in that the inner tube (1) is provided on its outer lateral surface (2) with a helically extending groove (3) and the tube (5) is provided on its inner circumferential surface (6) with a helical groove (7), which has substantially the same pitch as the groove (3) of the inner tube (1), that in the groove (3, 7) of one of these parts (1, 5) an elastically deformable seal (9) is held, which on the lateral surface (2, 6) of the respective other tube (1, 5) bears sealingly and under pressure, wherein the grooves (3, 7) of the two tubes (1, 5) are mutually axially displaced. Spiral-Wärmeübertrager nach Anspruch 1, dadurch gekennzeichnet, dass das Rohr (5) von einem weiteren Rohr (5') umgeben ist und Innenrohr eines weiteren Spiral-Wärmeübertragers nach Anspruch 1 ist.Spiral heat exchanger according to claim 1, characterized in that the tube (5) by a further tube (5 ') is surrounded and inner tube of a further spiral-heat exchanger according to claim 1. Spiral-Wärmeübertrager nach Anspruch 2, dadurch gekennzeichnet, dass das weitere Rohr (5') von einem Außenrohr (12) umgeben ist und wiederum Innenrohr eines weiteren Spiral-Wärmeübertragers nach Anspruch 1 ist.Spiral heat exchanger according to claim 2, characterized in that the further tube (5 ') is surrounded by an outer tube (12) and in turn is the inner tube of a further spiral heat exchanger according to claim 1. Spiral-Wärmeübertrager nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Radius des Querschnitts der Nuten (3, 7, 11, 7', 11', 14) kleiner als der Radius der jeweiligen Dichtung (9, 9', 9") im entspannten Zustand ist.Spiral heat exchanger according to one of claims 1 to 3, characterized in that the radius of the cross section of the grooves (3, 7, 11, 7 ', 11', 14) is smaller than the radius of the respective seal (9, 9 ', 9 ") is in the relaxed state. Spiral-Wärmeübertrager nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass bei in eine Nut (3, 11, 11') eingelegter Dichtung (9, 9', 9") diese mit Spiel in die Nut (7, 7', 14) des auf- oder eingeschraubten weiteren Rohres (5, 5', 12) eingreift.Spiral heat exchanger according to one of claims 1 to 4, characterized in that in a groove (3, 11, 11 ') inserted seal (9, 9', 9 ") this with play in the groove (7, 7 ', 14) of the screwed-on or screwed further tube (5, 5 ', 12) engages. Spiral-Wärmeübertrager nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Dichtung (9, 9', 9") aus Federstahl hergestellt ist.Spiral heat exchanger according to one of claims 1 to 5, characterized in that the seal (9, 9 ', 9 ") is made of spring steel. Verfahren zum Zusammenbau eines Spiral-Wärmeübertragers nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass man in die Nut (3) des Innenrohres (1) die spiralförmige Dichtung (9) aufschraubt oder dass man die Dichtung (9) auf das Innenrohr (1) aufschiebt und in die Nut (3) einrasten lässt und dass man danach das Innenrohr (1) samt Dichtung (9) in die Nut (7) des Rohrs (5) einschraubt, wonach die Rohre (1, 5) gegeneinander um weniger als die Ganghöhe axial verschoben werden.Process for assembling a spiral heat exchanger according to one of Claims 1 to 6, characterized in that the helical seal (9) is screwed into the groove (3) of the inner tube (1) or that the seal (9) is screwed onto the inner tube (9). 1) and let it engage in the groove (3) and then screwing the inner tube (1) together with the seal (9) in the groove (7) of the tube (5), after which the tubes (1, 5) are axially displaced against each other by less than the pitch. Verfahren zum Zusammenbau eines Spiral-Wärmeübertragers nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass man in die Nut (7) des Rohres (5) die spiralförmige Dichtung (9) einschraubt oder dass man die Dichtung (9) in das Rohr (5) einschiebt und in die Nut (7) einrasten lässt und dass man danach das Innenrohr (1) mit dessen Nut (3) in die spiralförmige Dichtung (9) im Rohr (5) einschraubt, wonach die Rohre (1, 5) gegeneinander um weniger als die Ganghöhe axial verschoben werden.Method for assembling a spiral heat exchanger according to one of Claims 1 to 6, characterized in that the helical seal (9) is screwed into the groove (7) of the tube (5) or that the seal (9) is inserted into the tube (9). 5) and can engage in the groove (7) and that then the inner tube (1) with its groove (3) in the spiral seal (9) in the tube (5) screwed, after which the tubes (1, 5) against each other be moved axially less than the pitch.
EP20070111991 2006-07-28 2007-07-06 Spiral heat exchanger and method for its production Not-in-force EP1882892B1 (en)

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AT12862006A AT503663B1 (en) 2006-07-28 2006-07-28 SPIRAL HEAT TRANSFER AND METHOD FOR THE PRODUCTION THEREOF

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1950519A2 (en) * 2007-01-25 2008-07-30 Josef Schaider Privatstiftung Pipe heat exchanger
WO2012092454A1 (en) * 2010-12-29 2012-07-05 Parker Hannifin Corporation Internal heat exchanger
CN101960250B (en) * 2008-04-14 2012-08-29 世元世龙技术株式会社 Gasket, reactor using the same for spiral sealing and manufacturing method thereof
CN104534909A (en) * 2014-12-19 2015-04-22 合肥市百胜科技发展股份有限公司 Water-cooled jacket
CN105188319A (en) * 2015-09-23 2015-12-23 杨晓方 Detection instrument and meter auxiliary device

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US3527293A (en) * 1968-11-13 1970-09-08 Pelt Corp Van Vented duplex tube assembly
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US5689971A (en) * 1995-09-22 1997-11-25 Gas Research Institute Absorption cooling system utilizing helical absorbers

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US644841A (en) * 1899-11-16 1900-03-06 Allen Ice Machine Company Art of manufacturing temperature-equalizing coils.
US3527293A (en) * 1968-11-13 1970-09-08 Pelt Corp Van Vented duplex tube assembly
EP0519252A1 (en) * 1991-06-21 1992-12-23 Carpigiani S.r.L. Method of manufacturing freezing cylinders for ice cream making machines
US5689971A (en) * 1995-09-22 1997-11-25 Gas Research Institute Absorption cooling system utilizing helical absorbers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1950519A2 (en) * 2007-01-25 2008-07-30 Josef Schaider Privatstiftung Pipe heat exchanger
EP1950519A3 (en) * 2007-01-25 2013-05-08 Josef Schaider Privatstiftung Pipe heat exchanger
CN101960250B (en) * 2008-04-14 2012-08-29 世元世龙技术株式会社 Gasket, reactor using the same for spiral sealing and manufacturing method thereof
WO2012092454A1 (en) * 2010-12-29 2012-07-05 Parker Hannifin Corporation Internal heat exchanger
CN104534909A (en) * 2014-12-19 2015-04-22 合肥市百胜科技发展股份有限公司 Water-cooled jacket
CN105188319A (en) * 2015-09-23 2015-12-23 杨晓方 Detection instrument and meter auxiliary device

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EP1882892B1 (en) 2013-04-10
AT503663A4 (en) 2007-12-15

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