DE2352571B1 - Connection of a gas pipeline made of polyethylene with a metal gas pipeline - Google Patents

Connection of a gas pipeline made of polyethylene with a metal gas pipeline

Info

Publication number
DE2352571B1
DE2352571B1 DE2352571A DE2352571A DE2352571B1 DE 2352571 B1 DE2352571 B1 DE 2352571B1 DE 2352571 A DE2352571 A DE 2352571A DE 2352571 A DE2352571 A DE 2352571A DE 2352571 B1 DE2352571 B1 DE 2352571B1
Authority
DE
Germany
Prior art keywords
gas
polyethylene
connection
pipe section
metallic
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.)
Granted
Application number
DE2352571A
Other languages
German (de)
Other versions
DE2352571C2 (en
Inventor
Osten Karl Friedrich
Herbert Wimmershoff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAIN GASWERKE AG
Vodafone GmbH
Original Assignee
MAIN GASWERKE AG
Mannesmann AG
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 MAIN GASWERKE AG, Mannesmann AG filed Critical MAIN GASWERKE AG
Priority to DE2352571A priority Critical patent/DE2352571C2/en
Publication of DE2352571B1 publication Critical patent/DE2352571B1/en
Application granted granted Critical
Publication of DE2352571C2 publication Critical patent/DE2352571C2/en
Expired legal-status Critical Current

Links

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
    • F16L47/20—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics
    • F16L47/24—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics for joints between metal and plastics pipes
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • 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
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/561—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using screw-threads being integral at least to one of the parts to be joined
    • 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
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • 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
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/50—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
    • B29C66/52296—Joining tubular articles involving the use of a socket said socket comprising sealing elements, e.g. gaskets
    • 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
    • B29C66/52298—Joining tubular articles involving the use of a socket said socket being composed by several elements
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • 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
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • 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
    • F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic

Description

Eine Verbindung durch Einschieben des Rohres in das Muffenende und somit eine Verschweißung mit der Muffeninnenwand, z. B. nach dem Polyfusions-Schweißverfahren, ist im Hinblick auf die Verarbeitung kleinerer Dimensionen (z. B. Hauszuleitungen) einer Heizelement-Stumpfschweißung vorzuziehen. Für eine vereinfachte Montage wird erfindungsgemäß weiterhin vorgeschlagen, eine für das Verbinden der Enden thermoplastischer Kunststoffrohre bekannte Elektroschweißmuffe in der Weise zu verwenden, daß in der Innenwand mindestens eines Anschlußendes der Übergangsmuffe eine zum Verschweißen mit dem Ende des Polyäthylen-Gasrohres und/oder des Einsatzstückes dienende Heizdrahtwicklung in an sich bekannter Weise eingebettet ist Ein weiteres Merkmal der Erfindung sieht vor, daß das metallische Rohrstück mit einer Verschraubung an der Übergangsmuffe befestigt ist. Dadurch wird der gasdichte Preßsitz des kurzen metallischen Rohrstücks innerhalb des Anschlußendes und außerdem die Verdrehungssicherheit der Verbindung bei der Montage und im Betrieb verstärkt Schließlich wird mit der Erfindung für die Installation einer Mauerdurchführung empfohlen, daß die Übergangsmuffe von einem mit einer Wandplatte verschweißten Schutzrohr umgeben und mit der Verschraubung des metallischen Rohrstücks an der Wandplatte befestigt ist.A connection by pushing the pipe into the socket end and thus a weld to the socket inner wall, z. B. after the polyfusion welding process, is smaller in terms of processing Dimensions (e.g. B. house supply lines) to a heating element butt weld to be preferred. For a simplified Assembly is also proposed according to the invention, one for connecting the Ends of thermoplastic pipes known electrofusion socket in the way to use that in the inner wall at least one connection end of the transition sleeve one for welding to the end of the polyethylene gas pipe and / or the insert Serving heating wire winding is embedded in a manner known per se Feature of the invention provides that the metallic pipe section with a screw connection is attached to the transition sleeve. This ensures the gas-tight press fit of the short metallic pipe section within the connection end and also the security against rotation the connection is reinforced during assembly and operation. Finally, with the Invention for the installation of a wall duct recommended that the transition sleeve surrounded by a protective tube welded to a wall plate and with the screw connection of the metallic pipe section is attached to the wall plate.

In den Zeichnungen sind zwei Ausführungsbeispiele der Erfindung im Längsschnitt dargestellt. Es zeigt A b b. 1 ein Anschlußstück mit dem Polyäthylen- und dem Metall-Gasrohr, A b b. 2 die Anordnung des Anschlußstücks bei einer Mauerdurchführung und A b b. 3 und 4 jeweils ein Ende des metallischen Rohrstücks. In the drawings, two embodiments of the invention are in Longitudinal section shown. It shows A b b. 1 a connector with the polyethylene and the metal gas pipe, A b b. 2 the arrangement of the connection piece in a wall duct and A b b. 3 and 4 each have one end of the metallic pipe section.

Das Anschlußstück ist aus der Polyäthylen-Übergangsmuffe 1 gebildet, deren Anschlußende 2 zur Aufnahme des Endes des aus Polyäthylen bestehenden Gaszuführungsrohres 3 dient und in dessen Innenwand die zum Verschweißen vorgesehene Heizdrahtwick- lung 4 eingebettet ist. Die Anschlüsse für die Stromzufuhr sind nicht dargestellt. In dem Anschlußende 5, dessen Wand dicker als das Anschlußende 2 ist, ist das metallische Rohrstück 6 mit Preßsitz angeordnet Dieses weist an seinem Ende den flanschartigen Dichtkegel 7 auf, der sich einerseits mit seiner konischen Dichtfläche 8 gegen den ringförmigen Vorsprung 9 der Muffeninnenwand und andererseits mit seiner Außenfläche 10 gegen das Stirnende des Polyäthylen-Gasrohres 3 abstützt. In der Innenwand des Anschlußendes 5 sind zur Abdichtung die 0-Ringe 11 und 12 eingebettet. The connection piece is formed from the polyethylene transition sleeve 1, whose connecting end 2 for receiving the end of the gas supply pipe made of polyethylene 3 is used and in the inner wall of which the heating wire winding provided for welding lung 4 is embedded. The connections for the power supply are not shown. In the connection end 5, the wall of which is thicker than the connection end 2, is metallic Pipe section 6 arranged with a press fit This has the flange-like at its end Sealing cone 7 on the one hand with its conical sealing surface 8 against the annular projection 9 of the socket inner wall and on the other hand with its outer surface 10 is supported against the front end of the polyethylene gas pipe 3. In the inner wall of the Connecting ends 5, the O-rings 11 and 12 are embedded for sealing.

Diese bestehen aus einem bis 280°C wärmebeständigen synthetischen Kautschuk (»Viton«). An dem freien Ende 13 des Rohrstücks 6 wird das nicht dargestellte metallische Gasrohr, welches den gleich großen Durchmesser wie das Rohrstück hat, gasdicht angeschraubt oder angeschweißt. Die Verschraubung 14 dient zur verdrehungssicheren Befestigung des Rohrstücks 6. These consist of a synthetic that is heat-resistant up to 280 ° C Rubber (»Viton«). At the free end 13 of the pipe section 6 is not shown metallic gas pipe, which has the same diameter as the pipe section, screwed or welded gas-tight. The screw connection 14 is used to prevent rotation Fixing the pipe section 6.

Bei dem in A b b. 2 dargestellten Ausführungsbeispiel weist das Anschlußende 5 der Muffe 1 den gleichen Innendurchmesser wie das Anschlußende 2 auf. Zur gasdichten Aufnahme des Rohrstücks 6 dient hier das aus Polyäthylen bestehende, hülsenförmige Einsatzstück 15, welches mittels der in der Innenwand des Anschlußendes eingebetteten Heizdrahtwicklung 16 elektrisch verschweißt ist. In the case of the in A b b. 2 has the connection end 5 of the sleeve 1 has the same inner diameter as the connection end 2. For gas-tight The tubular piece made of polyethylene is used here to accommodate the pipe section 6 Insert 15, which by means of the embedded in the inner wall of the connection end Heating wire winding 16 is electrically welded.

Für die Installation einer Mauerdurchführung ist die Rohrverbindung von dem Schutzrohr 17 umgeben, welches mit der an der Innenwand der Mauer angebrachten Platte 18 verschweißt ist. Die Befestigung der Übergangsmuffe an der Wandplatte erfolgt mit der Verschraubung 14. For the installation of a wall penetration, the pipe connection surrounded by the protective tube 17, which is attached to the on the inner wall of the wall Plate 18 is welded. The attachment of the transition sleeve to the wall plate takes place with the screw connection 14.

Das freie Ende des Rohrstücks 6 ist mit dem Gewinde 19 zum Verschrauben mit dem Gasrohr versehen (A b b. 3), oder es weist für eine Verschweißung die Fase 20 (A b b. 4) auf. The free end of the pipe section 6 is screwed to the thread 19 provided with the gas pipe (A b b. 3), or it has the bevel for welding 20 (A b b. 4).

Claims (1)

Patentansprüche: 1. Anschlußstück zum unlösbaren, längskraftschlüssigen Verbinden einer aus Polyäthylen bestehenden Gasrohrleitung mit einer metallischen Gasrohrleitung kleineren Durchmessers, insbesondere für die Installation einer Gas-Hauseinführung, d a -durch gekennzeichnet, daß das Anschlußstück in Form einer Übergangsmuffe (1) aus Polyäthylen ausgebildet ist, deren eines Anschlußende (2) zum Verschweißen mit dem Ende der Polyäthylen-Gasrohrleitung (3) dient und in deren anderem Anschluß ende (5) ein zum Verschweißen oder Verschrauben mit dem Ende des metallischen Gasrohres dienendes Rohrstück (6) mit Preßsitz angeordnet ist, welches den gleichen Durchmesser wie das hieran anzuschließende Gasrohr und an seinem dem Polyäthylen-Gasrohr zugewendeten Ende einen flanschartig ausgebildeten Dichtkegel (7) aufweist, der sich mit seiner konischen Dichtfläche (8) an einem ringförmigen Vorsprung (9) der Muffeninnenwand gasdicht anlegt 2. Anschlußstück nach Anspruch 1, dadurch gekennzeichnet, daß die Übergangsmuffe in ihrem das metallische Rohrstück aufnehmenden Anschlußende (5) ein das Rohrstück umschließendes, hülsenförmig ausgebildetes und mit der Innenwand des Anschluß endes verschweißtes Einsatzstück (í5) aus Polyäthylen aufweist, welches sich gegen den ringförmigen Vorsprung (9) abstützt und gegen die Außenfläche des metallischen Rohrstücks durch mindestens einen in seinem Umfang eingebetteten O-Ring (tod, 12) aus einem wärme- und erdgasbeständigen Werkstoff abgedichtet ist 3. Anschlußstück nach den Ansprüchen I und 2, dadurch gekennzeichnet, daß in der Innenwand mindestens eines Anschlußendes der Übergangsmuffe eine zum Verschweißen mit dem Ende des Polyäthylen-Gasrohres (3) und/oder des Einsatzstückes (15) dienende Heizdrahtwicklung (4, 16) in an sich bekannter Weise eingebettet ist. Claims: 1. Connection piece for non-detachable, restrained locking Connecting a gas pipeline made of polyethylene to a metallic one Small diameter gas pipeline, especially for the installation of a gas house entry, d a - characterized in that the connecting piece in the form of a transition sleeve (1) is made of polyethylene, one of the connecting ends (2) for welding with the end of the polyethylene gas pipeline (3) is used and in its other connection end (5) for welding or screwing to the end of the metal gas pipe serving pipe section (6) is arranged with a press fit, which has the same diameter like the gas pipe to be connected to it and on its facing the polyethylene gas pipe End has a flange-like sealing cone (7), which is with his conical sealing surface (8) on an annular projection (9) on the inner wall of the socket gastight creates 2. Connection piece according to claim 1, characterized in that the Transition sleeve in its connecting end (5) which receives the metal pipe section a sleeve-shaped design enclosing the pipe section and having the inner wall the connection end has welded insert (í5) made of polyethylene, which is supported against the annular projection (9) and against the outer surface of the metallic pipe section by at least one O-ring embedded in its circumference (tod, 12) made of a heat and natural gas resistant material is sealed 3. Connection piece according to claims I and 2, characterized in that in the inner wall at least a connecting end of the transition sleeve for welding to the end of the polyethylene gas pipe (3) and / or the insert (15) serving heating wire winding (4, 16) in itself is embedded in a known manner. 4. Anschlußstück nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß das metallische Rohrstück (6) mit einer Verschraubung (14) an der Übergangsmuffe befestigt ist. 4. Connection piece according to claims 1 to 3, characterized in that that the metallic pipe section (6) with a screw connection (14) on the transition sleeve is attached. 5. Anschlußstück nach den Ansprüchen 1 bis 4, für die Verwendung bei einer Mauerdurchführung, dadurch gekennzeichnet, daß die Übergangsmuffe (1) von einem mit einer Wandplatte (18) verschweißten Schutzrohr (17) umgeben und mit der Verschraubung (14) des metallischen Rohrstückes (6) an der Wandplatte befestigt ist Die Erfindung betrifft ein Anschlußstück zum unlösbaren, verdrehungssicheren Verbinden einer aus Polyäthylen bestehenden Gasrohrleitung mit einer metallischen Gasrohrleitung kleineren Durchmessers, insbesondere für die Installation einer Gas-Hauseinführung. 5. Connection piece according to claims 1 to 4, for use in the case of a wall duct, characterized in that the transition sleeve (1) surrounded by a protective tube (17) welded to a wall plate (18) and with the screw connection (14) of the metallic pipe section (6) attached to the wall plate The invention relates to a connection piece for the non-detachable, torsion-proof Connecting a gas pipeline made of polyethylene to a metallic one Small-diameter gas pipeline, especially for the installation of a gas house entry. Bekanntlich werden in neuerer Zeit für die Gasversorgung in steigendem Umfang Rohrleitungen aus Po-Polyäthylen verwendet, die im Erdboden verlegt werden. It is well known that the gas supply is increasing in recent times Perimeter pipelines made of Po polyethylene are used, which are laid in the ground. Hierbei stellt sich das Problem der Verbindung dieser Rohrleitungen mit bereits installierten metallischen Gasrohren, z. B. bei den Hauseinführungen. Gemäß den bekanntgewordenen Vorschlägen werden hierfür übliche metallische Klemmverschraubungen benutzt, wie sie auch in Wasserleitungsanlagen zum Verbinden von Kunststoffrohren mit Stahlrohren angewendet werden.This poses the problem of connecting these pipelines with already installed metal gas pipes, e.g. B. at the house lead-ins. According to the Proposals that have become known are the usual metallic compression fittings for this purpose used as they are in water supply systems for connecting plastic pipes to be applied with steel pipes. Auch beim Einbau von Absperrorganen in ganzgeschweißter Ausführung mit Anschweißenden werden bisher Klemmverbindungen bzw. Flanschverbindungen verwendet Derartige Verbindungen haben jedoch den Nachteil, daß sie im Hinblick auf die Betriebssicherheit lösbar und nicht längskraftschlüssig sind. Bei Zugbeanspruchung ist ein Herausziehen des Stahl- bzw. PA-Rohres möglich. Hierbei kann eine Gasundichtheit an der Klemmverschraubung eintreten, z. B. bei der Installation oder Montage im Keller.Also when installing shut-off devices in fully welded design With welding ends, clamp connections or flange connections have been used up to now However, such connections have the disadvantage that they are in terms of operational safety are detachable and not restrained. In the case of tensile stress, there is a pulling out of the steel or PA pipe possible. This can result in a gas leak in the compression fitting enter, e.g. B. during installation or assembly in the basement. Diese Nachteile werden mit der Erfindung vermieden. Sie hat sich zur Aufgabe gestellt, eine Verbindung zwischen einer Gasrohrleitung aus Polyäthylen und einer solchen aus Metall zu schaffen, die außer den Voraussetzungen für einen sicheren Betrieb der Gasleitungen auch denjenigen für eine einfache Montage bei der Installation einer Gas-Hauseinführung entspricht. These disadvantages are avoided with the invention. She has herself set the task of establishing a connection between a gas pipeline made of polyethylene and to create one made of metal that is beyond the conditions for one safe operation of the gas pipelines including those for easy assembly corresponds to the installation of a gas house entry. Gelöst wird diese Aufgabe durch ein Anschlußstück, welches erfindungsgemäß in Form einer Übergangsmuffe aus Polyäthylen ausgebildet ist, deren eines Anschlußende zum Verschweißen mit dem Ende der Polyäthylen-Gasrohrleitung dient und in deren anderem Anschlußende ein zum Verschweißen oder Verschrauben mit dem Ende des metallischen Gasrohres dienendes metallisches Rohrstück mit Preßsitz angeordnet ist, welches den gleichen Durchmesser wie das hieran anzuschließende Gasrohr und an seinem dem Polyäthylen-Gasrohr zugewendeten Ende einen flanschartig ausgebildeten Dichtkegel aufweist, der sich mit seiner konischen Dichtfläche an einem ringförmigen Vorsprung der Muffeninnenwand gasdicht anlegt Diese Einrichtung gewährleistet eine unlösbare und vor allen Dingen längskraftschlüssige Verbindung, bei der eine Beschädigung während der Montage weitgehend ausgeschlossen ist. Durch die besondere Anordnung und Ausbildung des kurzen metallischen Rohrstückes innerhalb der Übergangsmuffe ist die Gasdichtigkeit der Verbindung sichergestellt. This object is achieved by a connector which, according to the invention is in the form of a transition sleeve made of polyethylene, one end of which is connected is used for welding to the end of the polyethylene gas pipeline and in its other connection end one for welding or screwing to the end of the metallic Gas pipe serving metallic pipe piece is arranged with a press fit, which the same diameter as the gas pipe to be connected and on his The end facing the polyethylene gas pipe has a flange-like sealing cone has, which is with its conical sealing surface on an annular projection the inner wall of the socket is gas-tight. This device ensures an inseparable and above all restrained connection in which damage is largely excluded during assembly. Due to the special arrangement and forming the short metallic pipe section within the transition sleeve the gas tightness of the connection is ensured. Mit dem weiteren Merkmal sieht die Erfindung vor, daß die Übergangsmuffe in ihrem das metallische Rohrstück aufnehmenden Anschluß ende ein das Rohrstück umschließendes hülsenförmig ausgebildetes und mit der Innenwand des Anschlußendes verschweißtes Einsatzstück aus Polyäthylen aufweist, welches sich gegen den ringförmigen Vorsprung abstützt und gegen die Außenfläche des metallischen Rohrstücks durch mindestens einen in seinem Umfang eingebetteten O-Ring aus einem wärme- sowie erdgasbeständigen Werkstoff abgedichtet ist. Damit wird außer einer weiteren Verbesserung der Dichtigkeit erreicht, daß eine Polyäthylen-Übergangsmuffe bestimmter Abmessung für Hauseinführungs-Gasrohre unterschiedlicher Durchmesser verwendet werden kann, indem in dem Anschlußende der Muffe nur ein Einsatzstück entsprechenden Innendurchmessers angeordnet wird, was sich im Hinblick auf die Montage, Lagerhaltung u. dgl. wirtschaftlich auswirkt. With the further feature, the invention provides that the transition sleeve in their connection receiving the metallic pipe section, the pipe section ends enclosing sleeve-shaped and with the inner wall of the connection end has welded insert made of polyethylene, which is against the annular Supports projection and against the outer surface of the metallic pipe section by at least an O-ring embedded in its circumference made of a heat and natural gas resistant Material is sealed. This also further improves the tightness achieved that a polyethylene transition sleeve of certain dimensions for house entry gas pipes different diameter can be used by placing in the terminal end of the Sleeve only an insert piece of the appropriate inner diameter is arranged what has an economic effect in terms of assembly, storage and the like. So kann beispielsweise das Anschlußende mit dem Stirnende des Polyäthylen-Gasrohres nach dem Heizelement-Stumpfschweißverfahren verbunden werden. For example, the connection end with the front end of the polyethylene gas pipe be joined by the heating element butt welding process.
DE2352571A 1973-10-17 1973-10-17 Connection of a gas pipeline made of polyethylene with a metal gas pipeline Expired DE2352571C2 (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070042A (en) * 1975-10-17 1978-01-24 Polva Nederland B.V. High-strength coupling of plastic pipe to metal pipe
EP0040791A1 (en) * 1980-05-23 1981-12-02 Georg Fischer Aktiengesellschaft House-inlet for medium conduits, especially for gas and water conduits
FR2522389A1 (en) * 1982-03-01 1983-09-02 Sloane Mfg Co R & G JOINT, JOINT, CONNECTING SLEEVE AND METHOD FOR JOINING ARTICLES
EP0378406A3 (en) * 1989-01-11 1991-06-12 Osaka Gas Co., Ltd. Electrofusion joint and hot water supply header using the same
EP0535247A1 (en) * 1991-04-19 1993-04-07 Sekisui Kagaku Kogyo Kabushiki Kaisha Pipe joint member
EP0561733A1 (en) * 1992-03-19 1993-09-22 PLASSON MAAGAN MICHAEL INDUSTRIES Limited Adaptor for use with electrofusion fittings
WO1995016557A2 (en) * 1993-12-15 1995-06-22 Tokushu, Kogyo Kabushikigaisha Electrofusion fastening apparatus
EP0744573A1 (en) * 1995-05-24 1996-11-27 KE-KELIT Kunststoffwerk Gesellschaft m.b.H. Connector for pipes or hoses comprising a metal support element coated with a weldable plastic
EP0785388A2 (en) * 1992-02-27 1997-07-23 BG plc Method of lining a pipeline
EP4235008A1 (en) * 2022-02-25 2023-08-30 Frank GmbH Heating coil sleeve for welding and method for connecting two pipe sections with discharging medium

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070042A (en) * 1975-10-17 1978-01-24 Polva Nederland B.V. High-strength coupling of plastic pipe to metal pipe
EP0040791A1 (en) * 1980-05-23 1981-12-02 Georg Fischer Aktiengesellschaft House-inlet for medium conduits, especially for gas and water conduits
FR2522389A1 (en) * 1982-03-01 1983-09-02 Sloane Mfg Co R & G JOINT, JOINT, CONNECTING SLEEVE AND METHOD FOR JOINING ARTICLES
EP0585974A2 (en) * 1989-01-11 1994-03-09 Osaka Gas Co., Ltd. Electrofusion joint and hot water supply header using the same
EP0378406A3 (en) * 1989-01-11 1991-06-12 Osaka Gas Co., Ltd. Electrofusion joint and hot water supply header using the same
EP0585974A3 (en) * 1989-01-11 1996-02-07 Osaka Gas Co Ltd Electrofusion joint and hot water supply header using the same
US5398974A (en) * 1991-04-19 1995-03-21 Sekisui Kagaku Kogyo Kabushiki Kaisha Pipe connecting member
EP0535247A4 (en) * 1991-04-19 1993-09-08 Sekisui Kagaku Kogyo Kabushiki Kaisha Pipe joint member
EP0535247A1 (en) * 1991-04-19 1993-04-07 Sekisui Kagaku Kogyo Kabushiki Kaisha Pipe joint member
EP0785388A2 (en) * 1992-02-27 1997-07-23 BG plc Method of lining a pipeline
EP0785388A3 (en) * 1992-02-27 1999-04-28 BG plc Method of lining a pipeline
EP0561733A1 (en) * 1992-03-19 1993-09-22 PLASSON MAAGAN MICHAEL INDUSTRIES Limited Adaptor for use with electrofusion fittings
WO1995016557A2 (en) * 1993-12-15 1995-06-22 Tokushu, Kogyo Kabushikigaisha Electrofusion fastening apparatus
WO1995016557A3 (en) * 1993-12-15 1996-02-29 Tokushu Kogyo Kabushikigaisha Electrofusion fastening apparatus
EP0744573A1 (en) * 1995-05-24 1996-11-27 KE-KELIT Kunststoffwerk Gesellschaft m.b.H. Connector for pipes or hoses comprising a metal support element coated with a weldable plastic
EP4235008A1 (en) * 2022-02-25 2023-08-30 Frank GmbH Heating coil sleeve for welding and method for connecting two pipe sections with discharging medium

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