EP1479996B1 - Pipe coupling for heat exchanger, particularly for vehicle radiators - Google Patents

Pipe coupling for heat exchanger, particularly for vehicle radiators Download PDF

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Publication number
EP1479996B1
EP1479996B1 EP03291197A EP03291197A EP1479996B1 EP 1479996 B1 EP1479996 B1 EP 1479996B1 EP 03291197 A EP03291197 A EP 03291197A EP 03291197 A EP03291197 A EP 03291197A EP 1479996 B1 EP1479996 B1 EP 1479996B1
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EP
European Patent Office
Prior art keywords
pipe
connection piece
accordance
pipe coupling
pipe end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03291197A
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German (de)
French (fr)
Other versions
EP1479996A1 (en
Inventor
Michel Brun
Yvan Tschamber
Thomas Muller
Abdelkader Kerroum
Christian Cardot
Philippe Grigeois
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Mahle Behr France Rouffach SAS
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Behr France Rouffach SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Behr France Rouffach SAS filed Critical Behr France Rouffach SAS
Priority to EP03291197A priority Critical patent/EP1479996B1/en
Priority to AT03291197T priority patent/ATE352764T1/en
Priority to DE50306374T priority patent/DE50306374D1/en
Publication of EP1479996A1 publication Critical patent/EP1479996A1/en
Application granted granted Critical
Publication of EP1479996B1 publication Critical patent/EP1479996B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0248—Arrangements for sealing connectors to header boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/14—Fastening; Joining by using form fitting connection, e.g. with tongue and groove
    • F28F2275/146—Fastening; Joining by using form fitting connection, e.g. with tongue and groove with bayonet connections

Definitions

  • the invention relates to a pipe connection between a pipe end of a connecting pipe and a connecting piece of a collecting tank of a heat exchanger according to the preamble of claim 1.
  • Pipe connections ie so-called connectors were known from DE-A 35 17 488 and DE-A 44 03 402.
  • DE '488 relates to a radiator for motor vehicles with a plastic water tank, which has a connection piece for receiving a pipe end of a connecting pipe for the radiator.
  • the connecting tube has a collar in the form of a circumferential bead, is inserted into the connecting piece and held by a hairpin-shaped clamp form-fitting manner in the connecting piece, wherein the sealing takes place via an elastomeric sealing ring.
  • This known connector is designed for plastic water tanks and has the disadvantage that the connection pipe with an additional, losable part, namely the securing clip in the connection piece must be kept.
  • connection pipe is secured by a bayonet lock in the connection piece of the collecting tank.
  • a bayonet closure is to be understood as meaning a plug-in rotary connection known per se, in which the pipe end is first inserted into the connecting piece and then twisted to achieve a form-locking securing.
  • This type of connection which in principle - apart from the sealing ring - only consists of two parts, thus locks itself. This has the advantage that on a securing clip, d. H. An additional, loseable part, can be dispensed with.
  • the installation of the connection pipe is done only by inserting and twisting the pipe end.
  • Such a pipe connection is known from DE-A-4 445 091.
  • the locking means of the bayonet lock consist of latching noses, which are arranged at the open end of the pipe end and engage behind a locking surface of the connecting piece.
  • this has longitudinal grooves which are adapted to the locking lugs.
  • an abutment on the connecting piece is provided for the positive securing of the pipe end, on which rests the bead or the collar of the pipe end.
  • the pipe end is thus supported by means of the bead in one direction from the collection box and is held in the other direction by the locking lugs. This ensures a positive fit in both directions of the pipe axis.
  • the latching noses are formed from the tube wall of the pipe end, preferably by a shearing and stamping process, in the region of the end face of the pipe end. This gives a short-lasting and easy to produce pipe connection.
  • the sealing ring which seals the pipe end against the connecting piece, arranged between the outer seat or abutment and the longitudinal grooves.
  • connection piece is inwards, d. H. into the collection box. This results in a space-saving design for the collection box and for the entire heat exchanger, which usually has two connecting pieces, d. H. for an inlet connection pipe and for a drain connection pipe.
  • the collecting box is made of a metallic material, in particular an aluminum alloy and is preferably formed as a deep-drawn part.
  • the pipe connection of the invention can also be used for all-aluminum heat exchangers, especially radiators for motor vehicles, both for mechanically joined radiators - as described in the earlier application of the applicant (internal reference: 02 -BF-12) - or for soldered Radiator.
  • Fig. 1 shows a connecting pipe 1 for a radiator, not shown, of a motor vehicle.
  • the connecting pipe 1 has a radiator side, angled pipe end 2 and can be connected to a coolant - or heating circuit of the motor vehicle, not shown.
  • Fig. 2 shows the pipe end 2, which has a pipe wall 2a, with a circumferential bead 3, which forms a collar-shaped extension of the tube.
  • the bead 3 is followed by a smooth sealing portion 4, at the end of two locking lugs 5, 6 are arranged.
  • the locking lugs 5, 6 have in the direction of the tube longitudinal axis a to a width b and are formed by shearing a shear surface 8 of the wall 2a; they are bounded on the one hand by an end face 7 of the pipe end 2 and on the other hand by the shear surface. 8
  • Fig. 3 shows a collecting box 9 of the radiator, not shown, which incidentally corresponds to the radiator in the earlier application of the Applicant (internal reference: 02-BF-12).
  • the collecting box 9 has two inwardly directed connecting pieces 10, 11, which are intended for receiving connecting pipes.
  • the collecting box 9 is - as described in the earlier application - connected via a tube plate, not shown, with a heat exchanger block of a radiator.
  • the collecting box 9 is made as a deep-drawn part of an aluminum alloy. It can thus be soldered with an aluminum heat exchanger or - as shown here - mechanically joined, ie connected via a peripheral edge region 12 by means of tabs 13 with the tube sheet.
  • Fig. 4 shows a view from below of the inwardly directed connecting pieces 10, 11, between which there is a bead 14 for a longitudinal partition, not shown.
  • the collecting box 9 is divided into an inlet chamber 15 with the inlet nozzle 10 and a drain chamber 16 with the outlet nozzle 11.
  • the connecting pieces 10, 11 each have a cylindrical wall 10a or 11a, from which in each case two longitudinal grooves 17, 18 are formed.
  • These outwardly formed longitudinal grooves 17, 18 have an approximately semicircular cross section, which is adapted to the shape of the latching lugs 5, 6 (see FIG.
  • the connecting piece 10 has an inner guide section 19 with a diameter d1 and a second widened sealing section 20 with a diameter d2.
  • the outer section 20 is adjoined by a conically shaped seat 21, which serves as a contact surface or abutment for the collar 3 of the connection pipe 1 (see FIG. In section 19, the longitudinal groove 17 is arranged.
  • the bead 14 in the collecting box 9 serves to receive the longitudinal partition, not shown.
  • FIG. 6 shows the connection of the pipe end 2 to the connecting piece 11 in a first assembly step: the latching lugs 5, 6 of the pipe end 2 are guided in the longitudinal grooves 18 of the connection piece 11, ie the pipe end 2 can be inserted through the connecting piece 11 in the direction of its tube axis a (see Fig. 2).
  • Fig. 7 shows the same connection as shown in Fig. 6 in a second assembly step, wherein the locking lugs 5, 6 are already outside the longitudinal grooves 18, 19, that is no longer guided by them.
  • Fig. 8 shows the same connection as previously shown in Figures 6 and 7 in its locking position: the locking lugs 5, 6 are compared with the longitudinal grooves 18, 19 twisted and lie with its inner boundary surface (shear surface) 8 (see Fig .. 2) the front or locking surface 22 (see Fig. 5): thus, the pipe end 2 is positively secured in an axial direction.
  • Fig. 9 shows the connection of the connecting pipe 1 with pipe end 2 and connecting piece 10 (11) in a longitudinal section.
  • a sealing ring 23 is arranged, which seals the pipe end 2 against the connecting piece 10.
  • the collar 3 of the pipe end 2 rests on the conically formed seat 21 (see FIG. 5), ie, the shape of the collar, and thus fixes the connection pipe 1 in the direction of the pipe axis a downwards.
  • engages behind the locking lug 5 (the other is not shown), the end face 22 and thus fixes the connection pipe 1 in the other direction of the tube axis a.
  • a fixed bearing is formed, ie, the pipe end 2 is fixed in both axial directions.
  • Fig. 10 shows a modified embodiment of a pipe connection 24 between a pipe end 25 and a connecting piece 26.
  • the pipe end 25 in an analogous manner as in the previous embodiment - three evenly distributed over the circumference locking lugs 27, while in the connecting piece 26 three Longitudinal grooves 28 are arranged, which allow a passage of the locking lugs 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Abstract

Connection between an end (2) of a joint pipe (1) and a connecting pipe (10) of a collecting tank (9) of a heat-exchanger, especially a heating body for a motor vehicle, comprises a peripheral bead (3) on the joint pipe end which receives the connecting pipe and is sealed via a sealing ring (23). The joint pipe end is secured in the connecting pipe by a bayonet catch. Preferred Features: The bayonet catch consists of catch lugs (5) on the joint pipe end, longitudinal grooves in the connecting pipe, and a locking surface (22) on the connecting pipe. The collecting tank and the connecting pipe are made in one piece from a metallic material, especially an aluminum alloy, especially by a deep-drawing process.

Description

Die Erfindung betrifft eine Rohranschlussverbindung zwischen einem Rohrende eines Anschlussrohres und einem Anschlussstutzen eines Sammelkastens eines Wärmeübertragers nach dem Oberbegriff des Patentanspruches 1.The invention relates to a pipe connection between a pipe end of a connecting pipe and a connecting piece of a collecting tank of a heat exchanger according to the preamble of claim 1.

Rohranschlussverbindungen, d. h. so genannte Steckverbindungen wurden durch die DE-A 35 17 488 und die DE-A 44 03 402 bekannt. Die DE '488 betrifft einen Heizkörper für Kraftfahrzeuge mit einem Kunststoff-Wasserkasten, welcher einen Anschlussstutzen zur Aufnahme eines Rohrendes eines Anschlussrohres für den Heizkörper aufweist. Das Anschlussrohr weist einen Kragen in Form einer umlaufenden Sicke auf, wird in den Anschlussstutzen hineingesteckt und durch eine haarnadelförmig ausgebildete Klammer formschlüssig im Anschlussstutzen gehalten, wobei die Abdichtung über einen elastomeren Dichtring erfolgt. Diese bekannte Steckverbindung ist für Kunststoff-Wasserkästen konzipiert und hat den Nachteil, dass das Anschlussrohr mit einem zusätzlichen, verlierbaren Teil, nämlich der Sicherungsklammer im Anschlussstutzen gehalten werden muss. Durch die DE '402 wurde eine steckbare Rohranschlussverbindung für einen gelöteten Heizkörper bekannt, wobei ein Anschlussstutzen als zusätzliches Teil in einen metallischen Sammelkasten des Heizkörpers eingelötet wird. Im Übrigen ist diese Steckverbindung ähnlich wie die zuvor beschriebene gestaltet, d. h. das Rohrende weist ebenfalls einen Kragen auf, welcher der formschlüssigen Sicherung des Anschlussrohres mittels einer Sicherungsklammer dient. Die Abdichtung des Rohrendes erfolgt ebenfalls über einen elastomeren Dichtring. Auch hier besteht der Nachteil, dass als zusätzliches Teil eine Sicherungsklammer benötigt wird, welche darüber hinaus den Nachteil nach sich zieht, dass der Anschlussstutzen als zusätzliches Teil zum Sammelkasten ausgebildet und mit diesem verbunden werden muss.Pipe connections, ie so-called connectors were known from DE-A 35 17 488 and DE-A 44 03 402. DE '488 relates to a radiator for motor vehicles with a plastic water tank, which has a connection piece for receiving a pipe end of a connecting pipe for the radiator. The connecting tube has a collar in the form of a circumferential bead, is inserted into the connecting piece and held by a hairpin-shaped clamp form-fitting manner in the connecting piece, wherein the sealing takes place via an elastomeric sealing ring. This known connector is designed for plastic water tanks and has the disadvantage that the connection pipe with an additional, losable part, namely the securing clip in the connection piece must be kept. By DE '402, a plug-in pipe connection for a brazed radiator was known, wherein a connection piece is soldered as an additional part in a metallic collection box of the radiator. Incidentally, this connector is similar to the previously described designed, ie the pipe end also has a collar, which is the positive locking of the connection pipe by means of a securing clip is used. The sealing of the pipe end also takes place via an elastomeric sealing ring. Again, there is the disadvantage that as an additional part of a securing clip is needed, which also has the disadvantage that the connection piece must be designed as an additional part of the collection box and connected to this.

Es ist Aufgabe der vorliegenden Erfindung, eine Rohranschluss-Verbindung der eingangs genannten Art zu schaffen, die einfach herstellbar ist, aus möglichst wenigen Teilen besteht und insbesondere für metallische Wasserkästen verwendbar ist.It is an object of the present invention to provide a pipe connection of the type mentioned, which is easy to manufacture, consists of as few parts and in particular for metallic water tanks is used.

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Patentanspruches 1. Es ist vorgesehen, dass das Rohrende des Anschlussrohres durch einen Bajonettverschluss im Anschlussstutzen des Sammelkastens gesichert ist. Unter Bajonettverschluss ist eine an sich bekannte Steck-Drehverbindung zu verstehen, bei welchem das Rohrende zunächst in den Anschlussstutzen hineingesteckt und anschließend zur Erzielung einer formschlüssigen Sicherung verdreht wird. Diese Art der Verbindung, die prinzipiell - abgesehen vom Dichtring - nur aus zwei Teilen besteht, verriegelt sich somit selbst. Damit ergibt sich der Vorteil, dass auf eine Sicherungsklammer, d. h. ein zusätzliches, verlierbares Teil, verzichtet werden kann. Die Montage des Anschlussrohres erfolgt lediglich durch Einstekken und Verdrehen des Rohrendes. Eine solche Rohranschlussverbindung ist aus der DE-A-4 445 091 bekannt.The solution to this problem arises from the features of claim 1. It is envisaged that the pipe end of the connection pipe is secured by a bayonet lock in the connection piece of the collecting tank. A bayonet closure is to be understood as meaning a plug-in rotary connection known per se, in which the pipe end is first inserted into the connecting piece and then twisted to achieve a form-locking securing. This type of connection, which in principle - apart from the sealing ring - only consists of two parts, thus locks itself. This has the advantage that on a securing clip, d. H. An additional, loseable part, can be dispensed with. The installation of the connection pipe is done only by inserting and twisting the pipe end. Such a pipe connection is known from DE-A-4 445 091.

Erfindungsgemäß bestehen die Verriegelungsmittel des Bajonettverschlusses aus Rastnasen, die am offenen Ende des Rohrendes angeordnet sind und die eine Verriegelungsfläche des Anschlussstutzens hintergreifen. Zum Durchstecken der Rastnasen durch den Anschlussstutzen weist dieser Längsnuten auf, die den Rastnasen angepasst sind. Damit ist ein einfaches Einstecken des Rohrendes in den Anschlussstutzen mit anschließendem Verdrehen und Verriegeln möglich. Die Verriegelungsfläche am Anschlussstutzen wird vorteilhafterweise durch eine Stirnfläche gebildet, die von den Rastnasen hintergriffen wird.According to the invention, the locking means of the bayonet lock consist of latching noses, which are arranged at the open end of the pipe end and engage behind a locking surface of the connecting piece. For passing the locking lugs through the connecting piece, this has longitudinal grooves which are adapted to the locking lugs. This is a simple insertion of the pipe end in the connecting piece with subsequent twisting and locking possible. The locking surface on the connecting piece is advantageously formed by an end face which is engaged behind by the latching lugs.

In weiterer Ausgestaltung der Erfindung ist zur formschlüssigen Sicherung des Rohrendes ein Widerlager am Anschlussstutzen vorgesehen, auf welchem die Sicke bzw. der Kragen des Rohrendes aufliegt. Das Rohrende stützt sich also mittels der Sicke in einer Richtung am Sammelkasten ab und wird in der anderen Richtung durch die Rastnasen gehalten. Damit ist ein sicherer Formschluss in beide Richtungen der Rohrlängsachse gegeben.In a further embodiment of the invention, an abutment on the connecting piece is provided for the positive securing of the pipe end, on which rests the bead or the collar of the pipe end. The pipe end is thus supported by means of the bead in one direction from the collection box and is held in the other direction by the locking lugs. This ensures a positive fit in both directions of the pipe axis.

In vorteilhafter Ausgestaltung der Erfindung sind die Rastnasen aus der Rohrwand des Rohrendes ausgeformt, vorzugsweise durch einen Scher- und Prägevorgang, und zwar im Bereich der Stirnfläche des Rohrendes. Damit erhält man eine kurzbauende und einfach herstellbare Rohranschlussverbindung.In an advantageous embodiment of the invention, the latching noses are formed from the tube wall of the pipe end, preferably by a shearing and stamping process, in the region of the end face of the pipe end. This gives a short-lasting and easy to produce pipe connection.

In weiterer Ausgestaltung der Erfindung ist der Dichtring, welcher das Rohrende gegenüber dem Anschlussstutzen abdichtet, zwischen dem äußeren Sitz bzw. Widerlager und den Längsnuten angeordnet. Damit wird eine sichere Abdichtung der Steckverbindung erreicht, weil die Bajonettverbindung innerhalb des Dichtringes angeordnet ist.In a further embodiment of the invention, the sealing ring, which seals the pipe end against the connecting piece, arranged between the outer seat or abutment and the longitudinal grooves. For a secure sealing of the connector is achieved because the bayonet connection is disposed within the sealing ring.

In weiterer Ausgestaltung der Erfindung ist der Anschlussstutzen nach innen, d. h. in den Sammelkasten hineingerichtet. Dies ergibt eine Raum sparende Bauweise für den Sammelkasten und für den gesamten Wärmeübertrager, der in der Regel zwei Anschlussstutzen aufweist, d. h. für ein Zulaufanschlussrohr und für ein Ablaufanschlussrohr.In a further embodiment of the invention, the connection piece is inwards, d. H. into the collection box. This results in a space-saving design for the collection box and for the entire heat exchanger, which usually has two connecting pieces, d. H. for an inlet connection pipe and for a drain connection pipe.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist der Sammelkasten aus einem metallischen Werkstoff, insbesondere einer Aluminiumlegierung hergestellt und ist vorzugsweise als Tiefziehteil ausgebildet. Damit kann die erfindungsgemäße Rohranschluss-Verbindung auch für Ganzaluminium-Wärmeübertrager, insbesondere Heizkörper für Kraftfahrzeuge verwendet werden, und zwar sowohl für mechanisch gefügte Heizkörper - wie in der älteren Anmeldung der Anmelderin (internes Aktenzeichen: 02 -BF-12) beschrieben - oder für gelötete Heizkörper.According to a further advantageous embodiment of the invention, the collecting box is made of a metallic material, in particular an aluminum alloy and is preferably formed as a deep-drawn part. Thus, the pipe connection of the invention can also be used for all-aluminum heat exchangers, especially radiators for motor vehicles, both for mechanically joined radiators - as described in the earlier application of the applicant (internal reference: 02 -BF-12) - or for soldered Radiator.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im Folgenden näher beschrieben. Es zeigen

Fig. 1
ein Anschlussrohr für einen Heizkörper,
Fig. 2
ein Rohrende des Anschlussrohres gemäß Fig. 1,
Fig. 3
einen Sammelkasten mit Anschlussstutzen für einen Heizkörper in perspektivischer Darstellung,
Fig. 4
eine Teilansicht von unten auf den Sammelkasten gemäß Fig. 3,
Fig. 5
einen Querschnitt durch den Sammelkasten im Bereich des Anschlussstutzens,
Fig. 6
eine erste Montageposition des Rohrendes im Anschlussstutzen,
Fig. 7
eine zweite Montageposition des Rohrendes im Anschlussstutzen,
Fig. 8
eine Verriegelungsposition des Rohrendes im Anschlussstutzen,
Fig. 9
einen Längsschnitt des Rohrendes und des Anschlussstutzens mit Dichtring und
Fig. 10
eine Verriegelungsposition eines Rohrendes mit drei Rastnasen und eines Anschlussstutzens mit drei Längsnuten.
Embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it
Fig. 1
a connecting pipe for a radiator,
Fig. 2
a pipe end of the connecting pipe according to FIG. 1,
Fig. 3
a collecting box with connecting pieces for a radiator in perspective view,
Fig. 4
2 is a partial bottom view of the collection box according to FIG. 3, FIG.
Fig. 5
a cross section through the collecting box in the region of the connecting piece,
Fig. 6
a first mounting position of the pipe end in the connecting piece,
Fig. 7
a second mounting position of the pipe end in the connecting piece,
Fig. 8
a locking position of the pipe end in the connecting piece,
Fig. 9
a longitudinal section of the pipe end and the connecting piece with sealing ring and
Fig. 10
a locking position of a pipe end with three locking lugs and a connecting piece with three longitudinal grooves.

Fig. 1 zeigt ein Anschlussrohr 1 für einen nicht dargestellten Heizkörper eines Kraftfahrzeuges. Das Anschlussrohr 1 weist ein heizkörperseitiges, abgewinkeltes Rohrende 2 auf und kann mit einem nicht dargestellten Kühlmittel - bzw. Heizungskreislauf des Kraftfahrzeuges verbunden werden. Fig. 1 shows a connecting pipe 1 for a radiator, not shown, of a motor vehicle. The connecting pipe 1 has a radiator side, angled pipe end 2 and can be connected to a coolant - or heating circuit of the motor vehicle, not shown.

Fig. 2 zeigt das Rohrende 2, welches eine Rohrwand 2a aufweist, mit einer umlaufenden Sicke 3, die eine kragenförmige Erweiterung des Rohres bildet. An die Sicke 3 schließt sich ein glatter Dichtungsabschnitt 4 an, an dessen Ende zwei Rastnasen 5, 6 angeordnet sind. Die Rastnasen 5, 6 weisen in Richtung der Rohrlängsachse a eine Breite b auf und sind durch Scheren über eine Scherfläche 8 aus der Wand 2a ausgeformt; sie sind einerseits durch eine Stirnfläche 7 des Rohrendes 2 begrenzt und andererseits durch die Scherfläche 8. Fig. 2 shows the pipe end 2, which has a pipe wall 2a, with a circumferential bead 3, which forms a collar-shaped extension of the tube. The bead 3 is followed by a smooth sealing portion 4, at the end of two locking lugs 5, 6 are arranged. The locking lugs 5, 6 have in the direction of the tube longitudinal axis a to a width b and are formed by shearing a shear surface 8 of the wall 2a; they are bounded on the one hand by an end face 7 of the pipe end 2 and on the other hand by the shear surface. 8

Fig. 3 zeigt einen Sammelkasten 9 des nicht dargestellten Heizkörpers, welcher im Übrigen dem Heizkörper in der älteren Anmeldung der Anmelderin (internes Aktenzeichen: 02-BF-12) entspricht. Diese ältere Anmeldung wird vollumfänglich in den Offenbarungsgehalt dieser Anmeldung miteinbezogen. Der Sammelkasten 9 weist zwei nach innen gerichtete Anschlussstutzen 10, 11 auf, die für die Aufnahme von Anschlussrohren bestimmt sind. Der Sammelkasten 9 wird - wie in der älteren Anmeldung beschrieben - über einen nicht dargestellten Rohrboden mit einem Wärmeübertragerblock eines Heizkörpers verbunden. Der Sammelkasten 9 ist als Tiefziehteil aus einer Aluminiumlegierung hergestellt. Er kann somit mit einem Aluminiumwärmeübertrager verlötet oder - wie hier dargestellt - über einen umlaufenden Randbereich 12 mittels Laschen 13 mit dem Rohrboden mechanisch gefügt, d. h. verbunden werden. Fig. 3 shows a collecting box 9 of the radiator, not shown, which incidentally corresponds to the radiator in the earlier application of the Applicant (internal reference: 02-BF-12). This older application is fully included in the disclosure of this application. The collecting box 9 has two inwardly directed connecting pieces 10, 11, which are intended for receiving connecting pipes. The collecting box 9 is - as described in the earlier application - connected via a tube plate, not shown, with a heat exchanger block of a radiator. The collecting box 9 is made as a deep-drawn part of an aluminum alloy. It can thus be soldered with an aluminum heat exchanger or - as shown here - mechanically joined, ie connected via a peripheral edge region 12 by means of tabs 13 with the tube sheet.

Fig. 4 zeigt eine Ansicht von unten auf die nach innen gerichteten Anschlussstutzen 10, 11, zwischen denen sich eine Sicke 14 für eine nicht dargestellte Längstrennwand befindet. Dadurch wird der Sammelkasten 9 in eine Zulaufkammer 15 mit dem Zulaufstutzen 10 und eine Ablaufkammer 16 mit dem Ablaufstutzen 11 unterteilt. Die Anschlussstutzen 10, 11 weisen jeweils eine zylindrische Wandung 10a bzw. 11a auf, aus welcher jeweils zwei Längsnuten 17, 18 ausgeformt sind. Diese nach außen ausgeformten Längsnuten 17, 18 weisen einen etwa halbkreisförmigen Querschnitt auf, welcher der Form der Rastnasen 5, 6 (vgl. Fig. 2) angepasst ist. Fig. 4 shows a view from below of the inwardly directed connecting pieces 10, 11, between which there is a bead 14 for a longitudinal partition, not shown. Characterized the collecting box 9 is divided into an inlet chamber 15 with the inlet nozzle 10 and a drain chamber 16 with the outlet nozzle 11. The connecting pieces 10, 11 each have a cylindrical wall 10a or 11a, from which in each case two longitudinal grooves 17, 18 are formed. These outwardly formed longitudinal grooves 17, 18 have an approximately semicircular cross section, which is adapted to the shape of the latching lugs 5, 6 (see FIG.

Fig. 5 zeigt einen Schnitt durch den Anschlussstutzen 10 entsprechend der Schnittebenen V-V in Fig. 4. Der Anschlussstutzen 10 weist einen inneren Führungsabschnitt 19 mit einem Durchmesser d1 und einen zweiten erweiterten Dichtungsabschnitt 20 mit einem Durchmesser d2 auf. An den äußeren Abschnitt 20 schließt sich ein konisch ausgebildeter Sitz 21 an, welcher als Anlagefläche bzw. Widerlager für den Kragen 3 des Anschlussrohres 1 (vgl. Fig. 2) dient. Im Abschnitt 19 ist die Längsnut 17 angeordnet. Die Sicke 14 im Sammelkasten 9 dient zur Aufnahme der nicht dargestellten Längstrennwand. 5 shows a section through the connecting piece 10 corresponding to the sectional planes VV in FIG. 4. The connecting piece 10 has an inner guide section 19 with a diameter d1 and a second widened sealing section 20 with a diameter d2. The outer section 20 is adjoined by a conically shaped seat 21, which serves as a contact surface or abutment for the collar 3 of the connection pipe 1 (see FIG. In section 19, the longitudinal groove 17 is arranged. The bead 14 in the collecting box 9 serves to receive the longitudinal partition, not shown.

Fig. 6 zeigt die Verbindung des Rohrendes 2 mit dem Anschlussstutzen 11 in einem ersten Montageschritt: die Rastnasen 5, 6 des Rohrendes 2 sind in den Längsnuten 18 des Anschlussstutzens 11 geführt, d. h. das Rohrende 2 kann in Richtung seiner Rohrachse a (vgl. Fig. 2) durch den Anschlussstutzen 11 gesteckt werden. 6 shows the connection of the pipe end 2 to the connecting piece 11 in a first assembly step: the latching lugs 5, 6 of the pipe end 2 are guided in the longitudinal grooves 18 of the connection piece 11, ie the pipe end 2 can be inserted through the connecting piece 11 in the direction of its tube axis a (see Fig. 2).

Fig. 7 zeigt dieselbe Verbindung wie in Fig. 6 dargestellt in einem zweiten Montageschritt, wobei die Rastnasen 5, 6 bereits außerhalb der Längsnuten 18, 19 liegen, d. h. nicht mehr durch diese geführt sind. Fig. 7 shows the same connection as shown in Fig. 6 in a second assembly step, wherein the locking lugs 5, 6 are already outside the longitudinal grooves 18, 19, that is no longer guided by them.

Fig. 8 zeigt dieselbe Verbindung wie zuvor in den Figuren 6 und 7 dargestellt in ihrer Verriegelungsposition: die Rastnasen 5, 6 sind gegenüber den Längsnuten 18, 19 verdreht und liegen mit ihrer inneren Begrenzungsfläche (Scherfläche) 8 (vgl. Fig. 2) auf der Stirn- bzw. Verriegelungsflache 22 (vgl. Fig. 5) auf: somit ist das Rohrende 2 in einer axialen Richtung formschlüssig gesichert. Fig. 8 shows the same connection as previously shown in Figures 6 and 7 in its locking position: the locking lugs 5, 6 are compared with the longitudinal grooves 18, 19 twisted and lie with its inner boundary surface (shear surface) 8 (see Fig .. 2) the front or locking surface 22 (see Fig. 5): thus, the pipe end 2 is positively secured in an axial direction.

Fig. 9 zeigt die Verbindung von Anschlussrohr 1 mit Rohrende 2 und Anschlussstutzen 10 (11) in einem Längsschnitt. Im erweiterten Abschnitt 20 des Anschlussstutzens 10 ist ein Dichtring 23 angeordnet, der das Rohrende 2 gegenüber dem Anschlussstutzen 10 abdichtet. Der Kragen 3 des Rohrendes 2 liegt auf dem konisch ausgebildeten, d. h. der Form des Kragens angepassten Sitz 21 (vgl. Fig. 5) auf und fixiert somit das Anschlussrohr 1 in Richtung der Rohrachse a nach unten. Andererseits hintergreift die Rastnase 5 (die andere ist nicht dargestellt) die Stirnfläche 22 und fixiert somit das Anschlussrohr 1 in der anderen Richtung der Rohrachse a. Damit ist ein Festlager gebildet, d. h. das Rohrende 2 ist in beiden Axialrichtungen fixiert. Fig. 9 shows the connection of the connecting pipe 1 with pipe end 2 and connecting piece 10 (11) in a longitudinal section. In the expanded portion 20 of the connecting piece 10, a sealing ring 23 is arranged, which seals the pipe end 2 against the connecting piece 10. The collar 3 of the pipe end 2 rests on the conically formed seat 21 (see FIG. 5), ie, the shape of the collar, and thus fixes the connection pipe 1 in the direction of the pipe axis a downwards. On the other hand, engages behind the locking lug 5 (the other is not shown), the end face 22 and thus fixes the connection pipe 1 in the other direction of the tube axis a. Thus, a fixed bearing is formed, ie, the pipe end 2 is fixed in both axial directions.

Fig. 10 zeigt ein abgewandeltes Ausführungsbeispiel einer Rohranschluss-Verbindung 24 zwischen einem Rohrende 25 und einem Anschlussstutzen 26. Dabei weist das Rohrende 25 - in analoger Weise wie beim vorherigen Ausführungsbeispiel - drei gleichmäßig über den Umfang verteilte Rastnasen 27 auf, während im Anschlussstutzen 26 drei Längsnuten 28 angeordnet sind, die ein Durchstecken der Rastnasen 27 erlauben. Fig. 10 shows a modified embodiment of a pipe connection 24 between a pipe end 25 and a connecting piece 26. In this case, the pipe end 25 - in an analogous manner as in the previous embodiment - three evenly distributed over the circumference locking lugs 27, while in the connecting piece 26 three Longitudinal grooves 28 are arranged, which allow a passage of the locking lugs 27.

Bezugszahlenreference numerals

11
Anschlussrohrconnecting pipe
22
Rohrendepipe end
33
SickeBeading
44
Dichtungsabschnittsealing section
55
Rastnaselocking lug
66
Rastnaselocking lug
77
Stirnflächeface
88th
Scherflächeshear area
99
Sammelkastencollection box
1010
Anschlussstutzenspigot
1111
Anschlussstutzenspigot
1212
umlaufender Randsurrounding border
1313
Laschentabs
1414
Trennwandsickepartition bead
1515
Zulaufkammerinlet chamber
1616
Ablaufkammerdrain chamber
1717
Längsnutlongitudinal groove
1818
Längsnutlongitudinal groove
1919
Führungsabschnittguide section
2020
Dichtungsabschnittsealing section
2121
SitzSeat
2222
Verriegelungsflächelocking surface
2323
Dichtringseal
2424
RohranschlussverbindungPipe connections Connection
2525
Rohrendepipe end
2626
Anschlussstutzenspigot
2727
Rastnaselocking lug
2828
Längsnutlongitudinal groove

Claims (11)

  1. A pipe coupling between a pipe end (2) of a connecting pipe (1) and a connection piece (10, 11) of a collecting tank (9) of a heat exchanger, in particular a radiator for motor vehicles, the pipe end (2) having a circumferential bead (3), being inserted into the connection piece (10, 11) and being sealed by means of a sealing ring (23), the pipe end (2) being secured in the connection piece (10, 11) by a bayonet fixing,
    characterised in that
    the bayonet fixing has locking lugs (5, 6) on the pipe end (2), longitudinal channels (17, 18) in the connection piece (10, 11) to take the locking lugs (5, 6) and a locking face (22) on the connection piece (10), the longitudinal channels having internal contours adapted to the outer contours of the locking lugs (5, 6) to guide the locking lugs (5, 6) in the longitudinal channels (17, 18).
  2. A pipe coupling in accordance with claim 1,
    characterised in that
    the locking face takes the form of a front face (22) of the connection piece (10).
  3. A pipe coupling in accordance with claim 1 or 2,
    characterised in that
    the connection piece (10) has a seat (21) which is designed as a counter bearing for the bead (3).
  4. A pipe coupling in accordance with claim 1, 2 or 3,
    characterised in that
    the pipe end (2) has an end front face (7) and a pipe wall (2a) and the locking lugs (5, 6) are formed out of the pipe wall (2a) in the area of the front face (7).
  5. A pipe coupling in accordance with claim 4,
    characterised in that
    the locking lugs (5, 6) are manufactured by shearing and stamping the pipe wall (2a).
  6. A pipe coupling in accordance with one of claims 3 to 5,
    characterised in that
    the sealing ring (23) is positioned between the seat (21) and the longitudinal channels (17, 18).
  7. A pipe coupling in accordance with one of the preceding claims,
    characterised in that
    the connection piece (10, 11) is oriented into the collecting tank (9).
  8. A pipe coupling in accordance with one of the preceding claims,
    characterised in that
    the collecting tank (9) and the connection piece (10, 11) are manufactured in one piece using a metal material, in particular an aluminium alloy, in particular by means of deep drawing.
  9. A pipe coupling in accordance with one of the preceding claims,
    characterised in that
    the bayonet fixing has two or three locking lugs (5, 6, 27) at the pipe end (2, 25) and two or three longitudinal channels (17, 18, 28) in the connection piece (10, 11, 26).
  10. A pipe coupling in accordance with one of the preceding claims,
    characterised in that
    the longitudinal channels (17, 18, 28) are approximately semi-circular in cross-section.
  11. A heat exchanger, in particular a radiator for motor vehicles, having a connecting pipe (1) and a collecting tank (9), comprising a pipe coupling between a pipe end (2) of the connecting pipe (1) and a connection piece (10, 11) of the collecting tank (9),
    characterised in that
    the pipe coupling is designed in accordance with one of the preceding claims.
EP03291197A 2003-05-20 2003-05-20 Pipe coupling for heat exchanger, particularly for vehicle radiators Expired - Lifetime EP1479996B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP03291197A EP1479996B1 (en) 2003-05-20 2003-05-20 Pipe coupling for heat exchanger, particularly for vehicle radiators
AT03291197T ATE352764T1 (en) 2003-05-20 2003-05-20 PIPE CONNECTION FOR HEAT EXCHANGERS, ESPECIALLY HEINZ BODY FOR MOTOR VEHICLES
DE50306374T DE50306374D1 (en) 2003-05-20 2003-05-20 Pipe connection for heat exchangers, in particular Heinz body for motor vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03291197A EP1479996B1 (en) 2003-05-20 2003-05-20 Pipe coupling for heat exchanger, particularly for vehicle radiators

Publications (2)

Publication Number Publication Date
EP1479996A1 EP1479996A1 (en) 2004-11-24
EP1479996B1 true EP1479996B1 (en) 2007-01-24

Family

ID=33041117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03291197A Expired - Lifetime EP1479996B1 (en) 2003-05-20 2003-05-20 Pipe coupling for heat exchanger, particularly for vehicle radiators

Country Status (3)

Country Link
EP (1) EP1479996B1 (en)
AT (1) ATE352764T1 (en)
DE (1) DE50306374D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014200906A1 (en) * 2014-01-20 2015-07-23 MAHLE Behr GmbH & Co. KG Pipe connection, in particular for a heat exchanger

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004055086A1 (en) * 2004-11-15 2006-05-18 Behr Gmbh & Co. Kg Metallic collecting box for a heat exchanger, in particular for motor vehicles
JP2020085288A (en) * 2018-11-20 2020-06-04 株式会社デンソー Heat exchanger

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4379574A (en) * 1980-12-22 1983-04-12 Ex-Cell-O Corporation Radiator assembly (bayonet lock)
DE3517488A1 (en) 1985-05-15 1986-11-20 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart PIPE CONNECTION, IN PARTICULAR FOR A WATER CASE OF A HEAT EXCHANGER OF A VEHICLE HEATING
JPH07174479A (en) * 1993-12-17 1995-07-14 Nippondenso Co Ltd Pipe fixing structure and heat exchanger using this fixing structure
DE4403402A1 (en) 1994-02-04 1995-08-10 Behr Gmbh & Co Pipe connection for a water tank of a motor vehicle heat exchanger
FR2809485B1 (en) * 2000-05-29 2003-04-11 Valeo Thermique Moteur Sa COLLECTOR BOX FOR A BRAZED HEAT EXCHANGER AND EXCHANGER COMPRISING SUCH A BOX
GB2380965A (en) * 2001-10-16 2003-04-23 Llanelli Radiators Ltd Automotive heat exchanger having fluid connection piece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014200906A1 (en) * 2014-01-20 2015-07-23 MAHLE Behr GmbH & Co. KG Pipe connection, in particular for a heat exchanger
US9976821B2 (en) 2014-01-20 2018-05-22 Mahle International Gmbh Pipe connection, in particular for a heat exchanger

Also Published As

Publication number Publication date
DE50306374D1 (en) 2007-03-15
EP1479996A1 (en) 2004-11-24
ATE352764T1 (en) 2007-02-15

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