DE202005012830U1 - Joint between a fitting and a compound pipe, in particular, for sanitary and heating installations incorporates a contact area where weldable materials are joined by a melting process - Google Patents

Joint between a fitting and a compound pipe, in particular, for sanitary and heating installations incorporates a contact area where weldable materials are joined by a melting process Download PDF

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Publication number
DE202005012830U1
DE202005012830U1 DE202005012830U DE202005012830U DE202005012830U1 DE 202005012830 U1 DE202005012830 U1 DE 202005012830U1 DE 202005012830 U DE202005012830 U DE 202005012830U DE 202005012830 U DE202005012830 U DE 202005012830U DE 202005012830 U1 DE202005012830 U1 DE 202005012830U1
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Germany
Prior art keywords
fitting
layer
composite pipe
composite
pipe
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Expired - Lifetime
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DE202005012830U
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German (de)
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BECKER PLASTICS GmbH
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BECKER PLASTICS GmbH
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Priority to DE202005012830U priority Critical patent/DE202005012830U1/en
Publication of DE202005012830U1 publication Critical patent/DE202005012830U1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
    • B29C66/02245—Abrading, e.g. grinding, sanding, sandblasting or scraping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys

Abstract

The joint (2) between a fitting (1) and a compound pipe (3), in particular, for sanitary and heating installations incorporates a contact area (9) where weldable materials are joined by a melting process, and edge of the metal layer (6) is covered by a ring-shaped material bead (12).

Description

Beschreibung:Description:

Die Erfindung betrifft einen Leitungsverbund zwischen einem Fitting und einem Verbundrohr, insbesondere für die Sanitär- und Heizungsinstallation, wobei das Verbundrohr eine Innenschicht und eine Außenschicht aus einem schweißbaren Kunststoff mit einer dazwischen angeordneten Schicht aus Metall aufweist.The The invention relates to a line connection between a fitting and a composite pipe, in particular for the sanitary and heating installation, wherein the composite tube an inner layer and an outer layer of a weldable plastic with having a layer of metal disposed therebetween.

Verbundrohre mit Schichten aus Metall und Polymeren sind aus der Praxis bekannt. Derartige Verbundrohre für die Sanitär- und Heizungsinstallation weisen eine zwischen Polymerschichten angeordnete Metallschicht auf, die vornehmlich als mechanische Verstärkung dient. Zur Erstellung eines Leitungssystems werden die Verbundrohre mit Fittings aneinandergefügt, wobei die Verbundrohre durch Verklebung oder Verschweißen druckfest mit den Fittings verbunden werden können. Um bei der Verbindung eines Verbundrohres mit einem Fitting einen Kontakt der Schicht aus Metall mit dem in dem Verbundrohr geförderten Medium und eine damit verbundene Oxidation der Metallschicht zuverlässig zu verhindern, wird vor der Verbindung die äußere Hülle der Verbundrohre einschließlich der Schicht aus Metall entfernt, was zu einem großen Zeitaufwand bei der Montage führt.composite pipes with layers of metal and polymers are known in practice. Such composite pipes for the sanitary and heating installation have an interposed between polymer layers Metal layer, which serves primarily as a mechanical reinforcement. To create a pipe system, the composite pipes with Fittings joined together, the composite pipes being pressure-resistant by gluing or welding can be connected to the fittings. To the connection a composite pipe with a fitting a contact of the layer made of metal with the conveyed in the composite tube medium and a so Preventing associated oxidation of the metal layer reliably becomes possible the connection the outer shell of the Including composite pipes the layer of metal removed, resulting in a great deal of time during assembly leads.

Aus der Praxis ist weiterhin bekannt, Rohre und Fittings, die ausschließlich aus Polymeren bestehen, durch Erwärmung zu verbinden, wobei die Kontaktfläche zwischen Polymerrohr und Fitting aufgeschmolzen wird und sich die Materialien des Polymerrohres und des Fittings dauerhaft binden.Out Practice is still known, pipes and fittings made exclusively from Polymers are made by heating connect, with the contact surface between polymer tube and Fitting is melted and the materials of the polymer tube and permanently bind the fitting.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, einen dauerhaften Leitungsverbund zwischen einem Fitting und einem Verbundrohr anzugeben, der bei einer Minimierung der Arbeitsschritte eine schnelle und sichere Montage ermöglicht, wobei jeglicher Kontakt der an der Stirnseite des Verbund rohres freiliegenden Metallschicht mit Fluid, welches den Leitungsverbund durchströmt, vermieden werden soll.In front In this background, the invention is based on the object permanent connection between a fitting and a composite pipe specify a rapid one with a minimization of the work steps and secure mounting allows wherein any contact of the tube on the front side of the composite exposed metal layer with fluid, which the line composite flows through, avoided shall be.

Die Aufgabe wird erfindungsgemäß durch einen Leitungsverbund zwischen einem Fitting und einem Verbundrohr, insbesondere für die Sanitär- und Heizungsinstallation, gelöst, wobei das Verbundrohr eine Innenschicht und eine Außenschicht aus einem schweißbaren Kunststoff mit einer dazwischen angeordneten Schicht aus Metall aufweist, die in Richtung der Rohrinnenseite durch eine erste Klebstoffschicht mit der Innenschicht und in Richtung der Rohraußenseite durch eine zweite Klebstoffschicht mit der Außenschicht verbunden ist, wobei ein Ende des Verbundrohres in das Fitting, welches das Verbundrohr entlang einer Kontaktfläche umgibt und eine innere Schicht aus einem schweißbaren Kunststoff aufweist, eingesteckt ist, wobei das Verbundrohr und das Fitting durch Aufschmelzen der aus schweißbarem Kunststoff bestehenden Kontaktfläche stoffschlüssig verbunden sind, und wobei die Metallschicht an der Stirnseite des in das Fitting eingesetzten Verbundrohres durch eine ringförmige Wulst aus schweißbarem Kunststoff, die beim Einsetzen des Rohres in das Fitting entsteht, vollständig abgedeckt ist. Die ringförmige Wulst ist aus dem Material des Fittings und/oder dem Material der Außenschicht des Verbundrohres gebildet und trennt die an der Stirnseite des Verbundrohres freiliegende Metallschicht von dem fluiddurchströmten Raum des Leitungsverbundes. Geeignete schweißbare Kunststoffe sind vorzugsweise Polyethylen, Polypropylen oder Polybuten.The Task is achieved by a line connection between a fitting and a composite pipe, especially for the sanitary and heating installation, solved, wherein the composite tube has an inner layer and an outer layer made of a weldable Plastic with a layer of metal between them having, in the direction of the tube inside by a first adhesive layer the inner layer and in the direction of the pipe outside by a second Adhesive layer with the outer layer is connected, wherein one end of the composite pipe in the fitting, which surrounds the composite tube along a contact surface and an inner layer made of a weldable Plastic has, is inserted, wherein the composite pipe and the fitting by melting the weldable plastic existing contact area cohesively connected are, and wherein the metal layer on the front side of the fitting used composite pipe by an annular bead of weldable plastic, which is created when inserting the pipe into the fitting, completely covered is. The annular Bead is made of the material of the fitting and / or the material of the outer layer formed of the composite tube and separates the at the front of the Composite tube exposed metal layer of the fluid-flow space of the cable network. Suitable weldable plastics are preferably Polyethylene, polypropylene or polybutene.

Die Fittings, die in einer bevorzugten Ausführung der Erfindung vollständig aus schweißbarem Kunststoff, insbesondere Polyethylen, Polypropylen oder Polybuten bestehen und so kostengünstig zu fertigen sind, können als gerade oder abgewinkelte Stücke zur Verbindung von zwei Verbundrohren oder als Abzweig- und T-Stücke zur Verbindung von mehr als zwei Verbundrohren ausgebildet sein. Im Rahmen der Erfindung können die Fittings Anschluss enden von Regel- und/oder Absperrventilen sein. In einer bevorzugten Ausführung der Erfindung ist der Öffnungsbereich des Fittings, in welches das Verbundrohr eingesteckt ist, konisch erweitert.The Fittings, which in a preferred embodiment of the invention completely weldable plastic, in particular polyethylene, polypropylene or polybutene, and so inexpensive to be able to manufacture as straight or angled pieces for connecting two composite pipes or as branch and tees to Connection of more than two composite pipes may be formed. in the Within the scope of the invention The fittings are terminated by control valves and / or shut-off valves be. In a preferred embodiment The invention is the opening area of the fitting, in which the composite pipe is inserted, conical extended.

Der Außendurchmesser der Verbundrohre und der Innendurchmesser der die Verbundrohre aufnehmenden Fittings liegen beispielsweise in einem Bereich zwischen 12 mm und 63 mm. Vorzugsweise weist die Innenschicht und/oder die Außenschicht des Verbundrohres aus schweißbarem Kunststoff eine Dicke zwischen 0,5 mm und 3 mm auf. Die Schicht aus Metall weist vorzugsweise eine Dicke von 0,2 mm und 1,0 mm auf und ist jeweils mit einer Klebstoffschicht mit der Innenschicht und der Außenschicht verbunden. Die Klebstoffschichten, die beispielsweise von einem Hotmeltklebstoff gebildet werden, sind üblicherweise deutlich dünner als die weiteren Schichten des Verbundrohres. Als Material für die Schicht aus Metall ist im besonderen Maße Aluminium oder rostfreier Stahl geeignet.Of the outer diameter the composite pipes and the inner diameter of the composite pipes receiving Fittings are for example in a range between 12 mm and 63 mm. Preferably, the inner layer and / or the outer layer of the Compound tube of weldable Plastic has a thickness between 0.5 mm and 3 mm. The layer made of metal preferably has a thickness of 0.2 mm and 1.0 mm and is each with an adhesive layer with the inner layer and the outer layer connected. The adhesive layers, for example, of a Hotmelt adhesive are usually much thinner than the other layers of the composite pipe. As material for the layer made of metal is in particular dimensions Aluminum or stainless steel suitable.

Die ringförmige Wulst, die beim Einsetzen des Rohres in das Fitting entsteht und aus dem Material der Außenschicht des Verbundrohres und/oder der inneren Schicht des Fittings gebildet ist, kann über die Innenschicht hinaus etwas in das Innere des Verbundrohres vorstehen, wobei jedoch der Rohrquerschnitt nicht wesentlich reduziert wird. Die Wulst ist entlang ihres Umfanges mit der Innenschicht verschmolzen.The annular Bead, which arises when inserting the pipe into the fitting and from the material of the outer layer formed of the composite pipe and / or the inner layer of the fitting is, can over project the inner layer slightly into the interior of the composite pipe, however, the tube cross-section is not significantly reduced. The bead is fused along its circumference with the inner layer.

Das für den Leitungsverbund eingesetzte Verbundrohr weist vorzugsweise einen Längenausdehnungskoeffizient in Längsrichtung auf, der in einem Temperaturbereich zwischen 20 °C und 90 °C kleiner als 1 × 10– 4K–1, besonders bevorzugt kleiner als 4 × 10–5K–1 ist. Insbesondere können auch Verbundrohre eingesetzt werden, die eine Druckfestigkeit von mindestens 15 bar bei 70 °C und einen Biegeradius aufweisen, der kleiner ist als das Zehnfache des Durch messers des Verbundrohres. Das Verbundrohr ist vornehmlich für Warmwasseranwendungen bis 95 °C bestimmt.The used for the line network Composite pipe preferably has a linear expansion coefficient in the longitudinal direction which is smaller in a temperature range between 20 ° C and 90 ° C than 1 x 10-4 K -1, more preferably less than 4 × 10 -5 K -1. In particular, composite pipes can be used which have a compressive strength of at least 15 bar at 70 ° C and a bending radius which is smaller than ten times the diameter of the composite pipe. The composite pipe is primarily intended for hot water applications up to 95 ° C.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung ausführlich erläutert. Es zeigen schematisch:in the The invention will be described below with reference to a purely exemplary embodiment detailed drawing explained. They show schematically:

1 eine Schnittdarstellung eines erfindungsgemäßen Leitungsverbundes zwischen einem Fitting und einem Verbundrohr und 1 a sectional view of a pipe network according to the invention between a fitting and a composite pipe and

2 die Schritte zur Herstellung eines erfindungsgemäßen Leitungsverbundes, wobei ein Verbundrohr und ein Fitting in einem Schnitt dargestellt sind. 2 the steps for producing a composite pipe according to the invention, wherein a composite pipe and a fitting are shown in a section.

Die 1 zeigt ein gerades Fitting 1 aus Polypropylen, welches beidseitig einen Leitungsverbund 2 mit jeweils einem Verbundrohr 3 bildet. Die Verbundrohre 3 weisen eine Innenschicht 4 und eine Außenschicht 5 aus Polypropylen mit jeweils einer Dicke zwischen 0,5 mm und 3 mm auf. Zwischen der Innenschicht 4 und der Außenschicht 5 ist eine Schicht aus Metall 6, vorzugsweise Aluminium oder rostfreiem Stahl, angeordnet, die eine Dicke zwischen 0,2 mm und 1,0 mm aufweist und durch eine erste Klebstoffschicht 7 mit der Innenschicht 4 und mit einer zweiten Klebstoffschicht 8 mit der Außenschicht 5 verbunden ist. Jeweils ein Ende eines Verbundrohres 3 ist in das Fitting 1, welches jedes der Verbundrohre 3 entlang einer Kontaktfläche 9 umgibt, eingesteckt. Das Material der Außenschicht 5 des Verbundrohres 3 und der inneren Schicht 10 des Fittings 1 sind entlang der leicht konisch verlaufenden Kontaktfläche 9 miteinander verschmolzen und so dauerhaft verbunden. Der Innendurchmesser des Fittings 1 ist in dem mittleren Bereich des Fittings 1 kleiner als der Außendurchmesser des Verbundrohres 3. Die Schicht aus Metall 6 an der Stirnseite 11 jedes der in das Fitting 1 eingesetzten Verbundrohre 3 ist durch eine ringförmige Wulst 12 aus Polypropylen, die beim Einsetzen des Verbundrohres 3 in das Fitting 1 entsteht, vollständig abgedeckt. Jede ringförmige Wulst 12 ist aus dem Polypropylen der Außenschichten 5 der Verbundrohre 3 und der inneren Schicht 10 des Fittings 1 gebildet, wobei jede Wulst 12 auch mit der Innenschicht 4 des zugehörigen Verbundrohres 3 dauerhaft verschmolzen ist. Beide dargestellten Wülste 12 ragen in Richtung der Rohrachse über die Innenschicht 4 hinaus, wobei jedoch der Innendurchmesser nicht wesentlich reduziert ist. Bei dem Polypropylen als schweißbaren Kunststoff handelt es sich beispielsweise um ein ataktisches Polypropylen (PP-R).The 1 shows a straight fitting 1 made of polypropylene, which has a cable connection on both sides 2 each with a composite pipe 3 forms. The composite pipes 3 have an inner layer 4 and an outer layer 5 made of polypropylene, each having a thickness between 0.5 mm and 3 mm. Between the inner layer 4 and the outer layer 5 is a layer of metal 6 , preferably aluminum or stainless steel, having a thickness between 0.2 mm and 1.0 mm, and through a first layer of adhesive 7 with the inner layer 4 and with a second adhesive layer 8th with the outer layer 5 connected is. One end of a composite pipe 3 is in the fitting 1 which is each of the composite pipes 3 along a contact surface 9 surrounds, plugged. The material of the outer layer 5 of the composite pipe 3 and the inner layer 10 of the fitting 1 are along the slightly conical contact surface 9 fused together and so permanently connected. The inner diameter of the fitting 1 is in the middle area of the fitting 1 smaller than the outer diameter of the composite pipe 3 , The layer of metal 6 at the front 11 each one in the fitting 1 used composite pipes 3 is through an annular bead 12 made of polypropylene, which is when inserting the composite pipe 3 in the fitting 1 arises, completely covered. Every annular bead 12 is made of the polypropylene of the outer layers 5 the composite pipes 3 and the inner layer 10 of the fitting 1 formed, each bead 12 also with the inner layer 4 of the associated composite pipe 3 is permanently fused. Both beads shown 12 protrude in the direction of the tube axis over the inner layer 4 but with the inside diameter not being significantly reduced. The polypropylene as a weldable plastic is, for example, an atactic polypropylene (PP-R).

Wie in 2 dargestellt, wird bei der Herstellung eines Leitungsverbundes 2 die Innenseite des Fittings 1 in dem Bereich, in dem das Verbundrohr 3 in das Fitting 1 eingeschoben wird, vor der Verbindung mechanisch verarbeitet. Mit einem konisch geformten Schleifenwerkzeug 13 wird eine dünne Materialschicht in dem Öffnungsbereich 14 des Fittings 1 abgetragen. Durch die Entfernung der möglicherweise verschmutzten oder oxidierten Materialschicht wird eine verbesserte Verbindung mit dem Verbundrohr 3 erreicht. Zusätzlich wird durch eine konische Erweiterung des Öffnungsbereiches 14 das nachfolgende Einschieben des Verbundrohres 3 erleichtert. Anschließend an die mechanische Bearbeitung des Fittings 1 werden Fitting 1 und Verbundrohre 3 mittels einer Heizeinrichtung 15 in einem Abschnitt, der den späteren Verbindungsbereich bildet, erwärmt, wodurch der schweißbare Kunststoff der Innenschicht 4, der Außenschicht 6 und des Fittings 1 erweicht wird. Darauf folgend wird das Verbundrohr 3 mit seiner Stirnseite 11 in das Fitting 1 eingeschoben. Dabei wird durch aufgeschmolzenen schweißbarem Kunststoff eine stoffschlüssige Verbindung zwischen dem Verbundrohr 3 und dem Fitting 1 hergestellt sowie eine ringförmige Wulst 12 aus dem schweißbaren Kunststoff der Außenschicht 5 des Verbundrohres 3 und der inneren Schicht 10 des Fittings 1 gebildet. Bei einem weiteren Einschieben des Verbundrohres 3 wird die Schicht aus Metall 6 an der Stirnseite 11 des Verbundrohres 3 durch die ringförmige Wulst 12 vollständig abgedeckt. Der aufgeschmolzene schweißbare Kunststoff der Außenschicht 5 des Verbundrohres 3 und das der inneren Schicht 10 des Fittings 1 verbinden sich entlang einer das Ende des Verbundrohres 3 umgebenden Kontaktfläche 9 dauerhaft, so dass ein nach Erkalten des Fittings 1 und des Verbundrohres 3 dauerhafter und druckfester Leitungsverbund 2 entsteht.As in 2 is shown in the production of a cable network 2 the inside of the fitting 1 in the area where the composite pipe 3 in the fitting 1 is inserted, mechanically processed before the connection. With a conically shaped loop tool 13 becomes a thin layer of material in the opening area 14 of the fitting 1 ablated. Removal of the potentially contaminated or oxidized material layer will provide an improved bond with the composite tube 3 reached. In addition, by a conical extension of the opening area 14 the subsequent insertion of the composite tube 3 facilitated. Following the mechanical processing of the fitting 1 be fitting 1 and composite pipes 3 by means of a heating device 15 heated in a portion that forms the later connection area, whereby the weldable plastic of the inner layer 4 , the outer layer 6 and the fitting 1 is softened. Subsequently, the composite pipe 3 with his front side 11 in the fitting 1 inserted. This is melted weldable plastic a cohesive connection between the composite pipe 3 and the fitting 1 manufactured as well as an annular bead 12 from the weldable plastic of the outer layer 5 of the composite pipe 3 and the inner layer 10 of the fitting 1 educated. For a further insertion of the composite tube 3 becomes the layer of metal 6 at the front 11 of the composite pipe 3 through the annular bead 12 completely covered. The melted weldable plastic of the outer layer 5 of the composite pipe 3 and the inner layer 10 of the fitting 1 connect along one the end of the composite pipe 3 surrounding contact surface 9 permanently, leaving one after cooling the fitting 1 and the composite pipe 3 permanent and pressure-resistant cable network 2 arises.

Claims (8)

Leitungsverbund (2) zwischen einem Fitting (1) und einem Verbundrohr (3), insbesondere für die Sanitär- und Heizungsinstallation, wobei das Verbundrohr (3) eine Innenschicht (4) und eine Außenschicht (5) aus einem schweißbaren Kunststoff mit einer dazwischen angeordneten Schicht aus Metall (6) aufweist, die in Richtung der Rohrinnenseite durch eine erste Klebstoffschicht (7) mit der Innenschicht (4) und in Richtung der Rohraußenseite durch eine zweite Klebstoffschicht (8) mit der Außenschicht (5) verbunden ist, wobei ein Ende des Verbundrohres (3) in das Fitting (1), welches das Verbundrohr (3) entlang einer Kontaktfläche (9) umgibt und eine innere Schicht (10) aus einem schweißbaren Kunststoff aufweist, eingesteckt ist, wobei das Verbundrohr (3) und das Fitting (1) durch Aufschmelzen der aus schweißbarem Kunststoff bestehenden Kontaktfläche (9) stoffschlüssig verbunden sind und wobei die Schicht aus Metall (6) an der Stirnseite (11) des in das Fitting (1) eingesetzten Verbundrohres (3) durch eine ringförmige Wulst (12) aus schweißbarem Kunststoff, die beim Einsetzen des Verbundrohres (3) in das Fitting (1) entsteht, vollständig abgedeckt ist.Line network ( 2 ) between a fitting ( 1 ) and a composite pipe ( 3 ), in particular for the sanitary and heating installation, wherein the composite pipe ( 3 ) an inner layer ( 4 ) and an outer layer ( 5 ) made of a weldable plastic with a layer of metal ( 6 ), which in the direction of the pipe inside by a first adhesive layer ( 7 ) with the inner layer ( 4 ) and in the direction of the pipe outside by a second adhesive layer ( 8th ) with the outer layer ( 5 ), wherein one end of the composite pipe ( 3 ) in the fitting ( 1 ), which the composite pipe ( 3 ) along a contact surface ( 9 ) and an inner layer ( 10 ) out a weldable plastic, is inserted, wherein the composite tube ( 3 ) and the fitting ( 1 ) by melting the weldable plastic contact surface ( 9 ) are materially bonded and wherein the layer of metal ( 6 ) on the front side ( 11 ) of the fitting ( 1 ) used composite pipe ( 3 ) by an annular bead ( 12 ) made of weldable plastic, which when inserting the composite pipe ( 3 ) in the fitting ( 1 ), is completely covered. Leitungsverbund (2) nach Anspruch 1, dadurch gekennzeichnet, dass das Fitting (1) vollständig aus einem schweißbaren Kunststoff besteht.Line network ( 2 ) according to claim 1, characterized in that the fitting ( 1 ) consists entirely of a weldable plastic. Leitungsverbund (2) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der schweißbare Kunststoff aus Polyethylen, Polypropylen oder Polybuten besteht.Line network ( 2 ) according to claim 1 or 2, characterized in that the weldable plastic consists of polyethylene, polypropylene or polybutene. Leitungsverbund (2) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Innenschicht (4) des Verbundrohres eine Dicke zwischen 0,5 und 3 mm aufweist.Line network ( 2 ) according to one of claims 1 to 3, characterized in that the inner layer ( 4 ) of the composite pipe has a thickness between 0.5 and 3 mm. Leitungsverbund (2) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Außenschicht (5) des Verbundrohres eine Dicke zwischen 0,5 und 3 mm aufweist.Line network ( 2 ) according to one of claims 1 to 4, characterized in that the outer layer ( 5 ) of the composite pipe has a thickness between 0.5 and 3 mm. Leitungsverbund (2) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Schicht aus Metall (6) eine Dicke zwischen 0,2 und 1,0 mm aufweist.Line network ( 2 ) according to one of claims 1 to 5, characterized in that the layer of metal ( 6 ) has a thickness between 0.2 and 1.0 mm. Leitungsverbund (2) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Schicht aus Metall (6) aus Aluminium oder rostfreiem Stahl besteht.Line network ( 2 ) according to one of claims 1 to 6, characterized in that the layer of metal ( 6 ) is made of aluminum or stainless steel. Leitungsverbund (2) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Öffnungsbereich (14) des Fittings (1), in welches das Verbundrohr (3) eingesteckt ist, konisch erweitert ist.Line network ( 2 ) according to one of claims 1 to 7, characterized in that the opening area ( 14 ) of the fitting ( 1 ) into which the composite pipe ( 3 ) is inserted, is conically widened.
DE202005012830U 2005-08-13 2005-08-13 Joint between a fitting and a compound pipe, in particular, for sanitary and heating installations incorporates a contact area where weldable materials are joined by a melting process Expired - Lifetime DE202005012830U1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007042806A1 (en) 2007-09-07 2009-03-12 Egeplast Werner Strumann Gmbh & Co. Kg Method for welding plastic pipes
DE102010025023A1 (en) * 2010-06-24 2011-12-29 Gernot Teichmann Enossal jaw implant for insertion into a cavity prepared in a jawbone and template for insertion of the cavity into the jawbone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007042806A1 (en) 2007-09-07 2009-03-12 Egeplast Werner Strumann Gmbh & Co. Kg Method for welding plastic pipes
DE102010025023A1 (en) * 2010-06-24 2011-12-29 Gernot Teichmann Enossal jaw implant for insertion into a cavity prepared in a jawbone and template for insertion of the cavity into the jawbone

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