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DE202008001101U1 - Welding system for multilayer composite pipes made of plastic and metal - Google Patents

Welding system for multilayer composite pipes made of plastic and metal Download PDF

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Publication number
DE202008001101U1
DE202008001101U1 DE202008001101U DE202008001101U DE202008001101U1 DE 202008001101 U1 DE202008001101 U1 DE 202008001101U1 DE 202008001101 U DE202008001101 U DE 202008001101U DE 202008001101 U DE202008001101 U DE 202008001101U DE 202008001101 U1 DE202008001101 U1 DE 202008001101U1
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Germany
Prior art keywords
fitting
plastic
pipe
metal
heating
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DE202008001101U
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German (de)
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Priority to DE202008001101U priority Critical patent/DE202008001101U1/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
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12463—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being tapered
    • 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
    • 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
    • B29C66/52295—Joining tubular articles involving the use of a socket said socket comprising reinforcements
    • 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • 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
    • B29C66/63—Internally supporting the article during joining
    • B29C66/636—Internally supporting the article during joining using a support which remains in the joined object
    • 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
    • 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
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/97—Checking completion of joining or correct joining by using indications on at least one of the joined parts
    • B29C66/972—Checking completion of joining or correct joining by using indications on at least one of the joined parts by extrusion of molten material
    • 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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/007—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints specially adapted for joining pipes of dissimilar materials
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
    • B29K2995/0017—Heat stable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/003—Layered products comprising a metal layer

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Schweißsystem für mehrschichtige Verbundrohre aus Kunststoff und Metall zur Herstellung einer unlösbaren Verbindung zwischen Fitting (1) und Rohr (2) durch das Aufheizen des Rohrendes und der Anliegefläche (1c) des Fittings (1) mittels einer Heizvorrichtung (3) mit angebrachten ringförmigen Heizelementen (4 und 5), dadurch gekennzeichnet, dass der Fitting (1) formschlüssig so ausgebildet ist, dass er nach Erhitzen seines Hohlraumes (1c) und des mit ihm zu verbindenden Rohres (2) das Rohrende von seiner Innen- als auch von seiner Außenwand umschließt.welding system for multilayer composite pipes made of plastic and metal for making a permanent connection between fitting (1) and pipe (2) by heating the pipe end and the abutment surface (1c) of the fitting (1) by means of a heater (3) with attached annular heating elements (4 and 5), characterized that the fitting (1) is designed in a form-fitting manner that he after heating his cavity (1c) and with him to connecting pipe (2) the pipe end of its interior as well encloses from its outer wall.

Figure 00000001
Figure 00000001

Description

Die Erfindung bezieht sich auf ein System zur Verbindung von Rohren aus Kunststoff, insbesondere für mehrschichtige Verbundrohre, bestehend aus mehreren verschiedenen Schichten aus Kunststoff und Metall. Die Verbindung wird durch jeweils ein Rohrteil und ein Fittingselement hergestellt, wobei die einzelnen Elemente zeitgleich an ihrer angefassten Stoßfläche durch eine Heizvorrichtung angeweicht oder angeschmolzen werden und danach längs an deren Stoßfläche zusammengefügt werden. Durch das Zusammenfließen des Kunststoffs beider Teile kommt es zu einem Verschweißen und es bildet sich eine unlösbare Verbindung zwischen Rohr und Fitting.The The invention relates to a system for connecting pipes plastic, in particular for multilayer composite pipes, consisting of several different layers of plastic and Metal. The connection is made by a pipe part and a fitting element produced, with the individual elements at the same time touched on their Contact surface softened by a heater or melted and then along their abutment surface be joined together. By merging the plastic of both parts is welded together and it forms a permanent connection between pipe and fitting.

Bei den bisher gängigen Verfahren wurden unter anderem so genannte Elektromuffen mit integrierten Heizelementen benutzt, wie in den Dokumenten EP 0 711 948 B1 und DE 38 08 229 A1 beschrieben wird, oder äußere Spann- und Vakuumvorrichtungen wie in EP 0 263 980 A2 dargestellt. Alle bisher bekannten Schweißsysteme und Verfahren haben jedoch eines gleich – sie sind für mehrschichtige Rohre aus Kunststoff und Metall nicht geeignet. Da Metall bekanntlich einen weitaus höheren Schmelzpunkt als Kunststoff besitzt und da die äußere Kunststoffschicht der üblichen Verbundrohre vergleichsweise dünn und nicht tragfähig ist, wird ein Schweißverfahren der die äußere Schichten zweier zu verbindenden Rohre verbinden würde ausgeschlossen. Auch das bei Kunststoffrohren gängige Stoßverfahren, bei dem die Stoßflächen zweier Rohre gleichen Durchmessers mittels einer Heizvorrichtung bis zu deren Schmelzpunkt erhitzt werden und danach axial zusammengefügt werden, ist wegen des bereits erwähnten hohen Schmelzpunktes des Metalls bei Verbundrohren, nicht anwendbar.In the hitherto common methods, among other things, so-called electric sleeves with integrated heating elements were used, as in the documents EP 0 711 948 B1 and DE 38 08 229 A1 or external clamping and vacuum devices as in EP 0 263 980 A2 shown. However, all previously known welding systems and methods have one thing the same - they are not suitable for multilayer pipes made of plastic and metal. Since metal is known to have a much higher melting point than plastic and since the outer plastic layer of conventional composite pipes is relatively thin and not sustainable, a welding process would connect the outer layers of two connecting pipes would be excluded. Also common in plastic pipes impact method in which the abutting surfaces of two pipes of the same diameter are heated by a heater to its melting point and then axially joined together, because of the already mentioned high melting point of the metal in composite pipes, not applicable.

Die Aufgabe der Erfindung ist es daher, eine Verbindung zu entwickeln, die durch einen kostengünstigen Schweißprozess alle Kunststoffschichten des Verbundrohres einbezieht, um die Stabilität der Verbindung zu gewährleisten und die Metallschicht völlig ummantelt, um eine mögliche Korrosion zu verhindern.The The object of the invention is therefore to develop a compound through a cost-effective welding process incorporates all the plastic layers of the composite tube for stability to ensure the connection and the metal layer completely sheathed to prevent possible corrosion.

Diese Aufgabe ist gemäß der Erfindung dadurch gelöst, dass das mehrschichtige Verbundrohr durch einen Schweißvorgang an einen Fitting gekoppelt wird, der durch seine Form an das Rohr von seiner Innenseite als auch von seiner Außenseite anliegt. Die innere Anliegefläche des Fittings, der erfindungsgemäß aus Kunststoff besteht, weist eine Hülse aus Metall oder aus einem hitzebeständigem Kunststoff auf, die zur inneren Stabilität des Fittings, insbesondere bei dem Schmelzvorgang des Verbindens des Kunststoffs beider Verbindungskörper, beiträgt. Diese Hülse wird durch einen Rand oder Zahn im Inneren des Kunststofffittings gehalten. Der Schmelzvorgang findet auf die bereits bekannte Weise statt. Die beiden Verbindungskörper werden axial auf eine übliche elektrische Heizvorrichtung, mit mindestens einem Heizring, der genau den Konturen des Rohrs und/oder des Fittings entspricht, geschoben. Diese beiden zu verbindenden Teile werden dann bis zum Erweichungs- oder Schmelzpunkt erhitzt, in axialer Richtung von der Heizvorrichtung entnommen und wieder axial ineinander gestoßen. Durch die spezielle Ausbildung des Heizrings wird das zu verbundene Rohr von der Außen- sowie von der Innenseite erhitzt. Die radiale spaltförmige Öffnung des Fittings bildet eine den Konturen des Rohrs angepasste Anliegefläche. Durch das Anschmelzen des Fittings wird das hineingepresste Rohr von allen Seiten von der flüssigen Fittingmasse umhüllt und mit dem flüssigen Kunststoff des Rohrs zusammengeschweißt.These The object is achieved according to the invention characterized that the multilayer composite pipe by a welding process is coupled to a fitting, which by its shape to the pipe from its inside as well as from its outside. The inner contact surface of the fitting, the invention of Plastic consists, has a sleeve made of metal or a heat-resistant plastic, the inner Stability of the fitting, especially during the melting process connecting the plastic of both connecting bodies, contributes. This sleeve is made by a rim or Tooth held inside the plastic fitting. The melting process takes place in the already known way. The two connecting bodies be axially on a conventional electric heater, with at least one heating ring that exactly matches the contours of the pipe and / or fitting, pushed. To connect these two Parts are then heated to the softening or melting point, taken in the axial direction of the heater and again axially collided. Due to the special education of the heating ring, the pipe to be connected is disconnected from the outer and heated from the inside. The radial gap-shaped opening The fitting forms a contact surface adapted to the contours of the pipe. The melting of the fitting results in the tube being pressed into it enveloped on all sides by the liquid fitting compound and welded together with the liquid plastic of the pipe.

Vor dem Verschweißprozess kann das zu verbindende Rohr na seinem Ende auch mittels eines herkömmlichen Rohraufweitverfahrens aufgeweitet werden, dies ermöglicht einen gleich bleibenden Innendurchmesser der Verbindung und somit gleich bleibende Durchfluss-Charakteristika des durchströmenden Fluids oder Gases.In front the welding process, the pipe to be connected na his End also by means of a conventional Rohraufweitverfahrens be widened, this allows a consistent Internal diameter of the compound and thus constant flow characteristics of the flowing fluid or gas.

Ein weiteres Merkmal der Erfindung ist der Heizring, der mit einer hitzeresistenten und/oder Kunststoffabweisenden Schicht beschichtet sein kann. Dieser ist an eine übliche Heizvorrichtung angebracht wird und ist wie bereits beschrieben nach den Konturen des zu verbindenden Rohres ausgebildet und kann an der Seite eine oder mehrere Öffnungen aufweisen, die das Entweichen des beim Erhitzen überflüssigen Kunststoffes ermöglichen. Ferner kann die an die Außenwand des Rohres anliegende Innenwand des Heizringes ein Rillen oder Zackenprofil aufweisen, das ebenfalls ein Austreten der flüssigen Masse ermöglicht.One Another feature of the invention is the heating ring, which with a heat-resistant and / or plastic repellent layer may be coated. This is attached to a standard heater and is as already described according to the contours of the to be connected Pipe formed and can on the side of one or more openings having the escape of the superfluous upon heating Plastic allow. Furthermore, the to the outer wall the tube fitting inner wall of the heating ring a groove or serrated profile also having leakage of the liquid mass allows.

Weitere Einzelheiten, Erläuterungen und Merkmale der Erfindung sind aus der Beschreibung einer bevorzugten Ausführungsvariante und der schematischen Zeichnungen sowie der Patentansprüche im Folgenden zu erschließen. Dabei zeigen:Further Details, explanations and features of the invention are from the description of a preferred embodiment and the schematic drawings and the claims in the following. Showing:

1 ein Axialschnitt der zwei Verbindungskörper – ein Verbundrohr (2) aus zwei Schichten aus Kunststoff (2a, 2c) und einer Schicht aus Metall (2b) und ein Fitting (1) aus Kunststoff mit einer inneren Hülse (1b) aus Metall, wobei die Hülse einen radialen Fixierzahn (1d) aufweist und der Fitting an der selben Stelle eine Rille (1d), der Fitting weist auch eine konische radiale Vertiefung (1c) auf, die nach dem Erhitzungsprozess genau der Anliegefläche des Rohrendes (2) entspricht; 1 an axial section of the two connecting bodies - a composite pipe ( 2 ) made of two layers of plastic ( 2a . 2c ) and a layer of metal ( 2 B ) and a fitting ( 1 ) made of plastic with an inner sleeve ( 1b ) made of metal, wherein the sleeve has a radial fixing tooth ( 1d ) and the fitting in the same place a groove ( 1d ), the fitting also has a conical radial recess ( 1c ), which after the heating process exactly the contact surface of the pipe end ( 2 ) corresponds;

2 ein Axialschnitt der bereits aufgeschobenen Verbindungskörper (1 und 2) auf eine beispielsweise elektrische Heizvorrichtung (3) aus Metall, an die mittels einer Schraube (6) und Mutter (7) zwei Heizringe angebracht sind. Ein Heizring (4) entspricht dabei den Konturen des zu verbindenden Rohrendes (2), der zweite Heizring (5) entspricht den Konturen des mit dem Rohr (2) zu verbindenden Fittings (1); 2 an axial section of the already suspended connecting body ( 1 and 2 ) on one at For example, electric heating device ( 3 ) of metal, to which by means of a screw ( 6 ) and mother ( 7 ) two heating rings are attached. A heating ring ( 4 ) corresponds to the contours of the pipe end to be connected ( 2 ), the second heating ring ( 5 ) corresponds to the contours of the pipe ( 2 ) fittings to be connected ( 1 );

3 ein Axialschnitt einer Schweißverbindung der Verbindungskörper (1 und 2) nach einer bereits durchgeführten Aufschmelzung der Anliegeflächen der beiden Elemente. Dabei bilden sich bei dieser Darstellung Schweißnähte (8) aus Kunststoff. Das Ende des Verbundrohres (2) und die darin liegende und unverformte Metallschicht wird vom geschmolzenen Kunststoff (9) der beiden Verbindungskörper (1 und 2) vollkommen eingeschlossen; 3 an axial section of a welded joint of the connecting body ( 1 and 2 ) after an already performed melting of the contact surfaces of the two elements. In this case, welds ( 8th ) made of plastic. The end of the composite pipe ( 2 ) and the underlying and undeformed metal layer is from the molten plastic ( 9 ) of the two connecting bodies ( 1 and 2 completely enclosed;

4 ein Frontalschnitt und ein Axialschnitt des Heizringes (4) mit einem Außenring (4a) und einem Innenring (4b), Austrittsöffnungen (4c) zum Entweichen überflüssigen Materials und einer Schraubenöffnung (4d) zur Anbringung auf die Heizvorrichtung. Der Außenring (4a) weist bei dieser Darstellung ein Rillenprofil (4e) auf, der ebenfalls das Austreten flüssigen Materials ermöglicht. 4 a frontal section and an axial section of the heating ring ( 4 ) with an outer ring ( 4a ) and an inner ring ( 4b ), Outlet openings ( 4c ) for the escape of superfluous material and a screw opening ( 4d ) for attachment to the heater. The outer ring ( 4a ) has in this illustration a groove profile ( 4e ), which also allows leakage of liquid material.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • - EP 0711948 B1 [0002] - EP 0711948 B1 [0002]
  • - DE 3808229 A1 [0002] - DE 3808229 A1 [0002]
  • - EP 0263980 A2 [0002] EP 0263980 A2 [0002]

Claims (5)

Schweißsystem für mehrschichtige Verbundrohre aus Kunststoff und Metall zur Herstellung einer unlösbaren Verbindung zwischen Fitting (1) und Rohr (2) durch das Aufheizen des Rohrendes und der Anliegefläche (1c) des Fittings (1) mittels einer Heizvorrichtung (3) mit angebrachten ringförmigen Heizelementen (4 und 5), dadurch gekennzeichnet, dass der Fitting (1) formschlüssig so ausgebildet ist, dass er nach Erhitzen seines Hohlraumes (1c) und des mit ihm zu verbindenden Rohres (2) das Rohrende von seiner Innen- als auch von seiner Außenwand umschließt.Welding system for multilayer composite pipes made of plastic and metal for producing a permanent connection between fitting ( 1 ) and pipe ( 2 ) by the heating of the pipe end and the contact surface ( 1c ) of the fitting ( 1 ) by means of a heating device ( 3 ) with attached annular heating elements ( 4 and 5 ), characterized in that the fitting ( 1 ) is designed in a form-fitting manner such that, after heating its cavity ( 1c ) and the pipe to be connected to it ( 2 ) surrounds the pipe end of its inner and outer wall. Fitting (1) nach Anspruch 1, dadurch gekennzeichnet, dass er in seinem Inneren eine Hülse (1b) aus hitzeresistentem Material oder aus Metall zur Stabilisierung seiner Innenwand aufweist.Fitting ( 1 ) according to claim 1, characterized in that it comprises in its interior a sleeve ( 1b ) made of heat-resistant material or metal for stabilizing its inner wall. Fitting (1) und Hülse (1b) nach einem der vorgehenden Ansprüche, dadurch gekennzeichnet, dass der Fitting (1) eine Einrastrille (1d) und die Hülse (1b) einen Einrastzahn (1d) ausbilden, wodurch die Hülse (1b) im Fitting (1) einrastet.Fitting ( 1 ) and sleeve ( 1b ) according to one of the preceding claims, characterized in that the fitting ( 1 ) a latching groove ( 1d ) and the sleeve ( 1b ) a latch tooth ( 1d ), whereby the sleeve ( 1b ) in the fitting ( 1 ) engages. Ringförmiges Heizelement (4) nach Anspruch 1, dadurch gekennzeichnet, dass der Außenring (4a) auf der Innenseite ein Rillenprofil (4e) aufweist, das das Austreten von geschmolzenem Kunststoff ermöglicht.Annular heating element ( 4 ) according to claim 1, characterized in that the outer ring ( 4a ) on the inside a groove profile ( 4e ), which allows the escape of molten plastic. Ringförmiges Heizelement (4) nach einem der vorgehenden Ansprüche, dadurch gekennzeichnet, dass das ringförmige Heizelement (4) mindestens eine kleinere Öffnung (4c) aufweist, die das Austreten von geschmolzenem Kunststoff ermöglicht.Annular heating element ( 4 ) according to one of the preceding claims, characterized in that the annular heating element ( 4 ) at least one smaller opening ( 4c ), which allows the escape of molten plastic.
DE202008001101U 2008-01-25 2008-01-25 Welding system for multilayer composite pipes made of plastic and metal Expired - Lifetime DE202008001101U1 (en)

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WO2009148318A1 (en) * 2008-06-06 2009-12-10 Tersia Nederland Bv Coupling piece with flange, conduit system with at least one such coupling piece, method for connecting a conduit and a coupling piece, and connecting device
WO2011096908A1 (en) * 2010-02-03 2011-08-11 Kalde Klima Orta Basinc Fittings Ve Valf Sanayi Anonim Sirketi A screw plate for combining pipe and connection components
WO2012008933A1 (en) * 2010-07-15 2012-01-19 Novaplast Plastik Sanayi Ve Ticaret A.S (polypropylene) plastic pipe welding machine with special safety ring and a welding adaptor with special safety ring
NL2005306C2 (en) * 2010-09-02 2012-03-05 Tersia Nederland B V CONNECTOR FOR MULTI-LAYER PIPES, WELDING DEVICE FOR CONNECTING THE CONNECTOR TO MULTI-LAYER PIPES, METHOD OF CONNECTING AND A COMPOSITION OBTAINED VIA THE METHOD.
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ES2406944R1 (en) * 2011-11-05 2013-07-15 Multitubo Montaje Y Distribucion S L PROCEDURE AND MEANS OF DRIVING PUMP
CN107816592A (en) * 2017-11-29 2018-03-20 日丰企业（佛山）有限公司 For connecting the pipe fitting of metal composite pipe material

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Cited By (19)

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Publication number Priority date Publication date Assignee Title
WO2009148318A1 (en) * 2008-06-06 2009-12-10 Tersia Nederland Bv Coupling piece with flange, conduit system with at least one such coupling piece, method for connecting a conduit and a coupling piece, and connecting device
EA020723B1 (en) * 2010-02-03 2015-01-30 Калде Клима Орта Басиндж Фиттингс Ве Валф Санайи Аноним Сиркети Method for combining connection components with polypropylene pipe pp-r
WO2011096908A1 (en) * 2010-02-03 2011-08-11 Kalde Klima Orta Basinc Fittings Ve Valf Sanayi Anonim Sirketi A screw plate for combining pipe and connection components
WO2012008933A1 (en) * 2010-07-15 2012-01-19 Novaplast Plastik Sanayi Ve Ticaret A.S (polypropylene) plastic pipe welding machine with special safety ring and a welding adaptor with special safety ring
RU2583319C2 (en) * 2010-09-02 2016-05-10 Терсиа Б.В. Connection part for multi-layer pipelines, welding apparatus for connection of connection part with multi-layer pipeline, method of connection and assembly produced by this method
US9631758B2 (en) 2010-09-02 2017-04-25 Tersia B.V. Connecting piece for multilayered conduits, method of connecting, and assembly obtained by the method
CN103180652A (en) * 2010-09-02 2013-06-26 特尔萨尼德兰有限公司 A connecting piece for multilayered conduits, welding apparatus for connecting a connecting piece with multilayered conduits, method of connecting, and an assembly obtained by the method
RU2709896C2 (en) * 2010-09-02 2019-12-23 Терсиа Б.В. Connecting part for multilayer pipelines, method of connection and unit produced by such method
CN105179860B (en) * 2010-09-02 2017-10-10 特尔萨有限公司 Connector, welder, coupling method and its gained component of multi-layer piping
EP2784365A1 (en) 2010-09-02 2014-10-01 Tersia B.V. Connecting piece for multilayered conduits, and method of connecting, and an assembly obtained by the method
WO2012030221A1 (en) * 2010-09-02 2012-03-08 Tersia Nederland B.V. Connecting piece for multilayered conduits, welding apparatus for connecting a connecting piece with multilayered conduits, method of connecting, and an assembly obtained by the method
CN105179860A (en) * 2010-09-02 2015-12-23 特尔萨有限公司 Connecting Piece For Multilayered Conduits, Welding Apparatus For Connecting A Connecting Piece With Multilayered Conduits, Method Of Connecting, And An Assembly Obtained By The Method
NL2005306C2 (en) * 2010-09-02 2012-03-05 Tersia Nederland B V CONNECTOR FOR MULTI-LAYER PIPES, WELDING DEVICE FOR CONNECTING THE CONNECTOR TO MULTI-LAYER PIPES, METHOD OF CONNECTING AND A COMPOSITION OBTAINED VIA THE METHOD.
CN103180652B (en) * 2010-09-02 2016-06-01 特尔萨有限公司 The connector of multi-layer piping, welder, coupling method and gained assembly thereof
ES2406944R1 (en) * 2011-11-05 2013-07-15 Multitubo Montaje Y Distribucion S L PROCEDURE AND MEANS OF DRIVING PUMP
NL2007967C2 (en) * 2011-12-14 2013-06-17 Tersia Nederland B V COUPLER FOR MULTI-LAYER PIPES, WELDING DEVICE FOR CONNECTING THE COUPLER TO MULTI-LAYER PIPES, METHOD OF COUPLING AND A COMPOSITION OBTAINED VIA THE METHOD.
WO2013095123A1 (en) 2011-12-14 2013-06-27 Tersia Nederland B.V. Connecting piece for multilayered conduits, method of connecting, and an assembly obtained by the method
CN107816592A (en) * 2017-11-29 2018-03-20 日丰企业（佛山）有限公司 For connecting the pipe fitting of metal composite pipe material
CN107816592B (en) * 2017-11-29 2024-05-03 日丰企业（佛山）有限公司 Pipe fitting for connecting metal composite pipe

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