DE9208024U1 - Welding sleeve for plastic pipes - Google Patents

Welding sleeve for plastic pipes

Info

Publication number
DE9208024U1
DE9208024U1 DE9208024U DE9208024U DE9208024U1 DE 9208024 U1 DE9208024 U1 DE 9208024U1 DE 9208024 U DE9208024 U DE 9208024U DE 9208024 U DE9208024 U DE 9208024U DE 9208024 U1 DE9208024 U1 DE 9208024U1
Authority
DE
Germany
Prior art keywords
sleeve
welding
welding sleeve
sleeve according
cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE9208024U
Other languages
German (de)
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.)
JRG Gunzenhauser AG
Original Assignee
JRG Gunzenhauser 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 JRG Gunzenhauser AG filed Critical JRG Gunzenhauser AG
Publication of DE9208024U1 publication Critical patent/DE9208024U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • 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
    • 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
    • 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
    • B29C65/344—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 being a woven or non-woven fabric or being a mesh
    • 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
    • B29C65/3444—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 being a ribbon, band or strip
    • 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
    • B29C65/3444—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 being a ribbon, band or strip
    • B29C65/3452—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 being a ribbon, band or strip forming a sleeve, e.g. a wrap-around sleeve
    • 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
    • B29C66/52295—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
    • B29C66/70—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
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73751—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73755—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being fully cured, i.e. fully cross-linked, fully vulcanized
    • 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
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings

Landscapes

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

Description

Schweissmuffe für KunststoffrohreWelding sleeve for plastic pipes

Es ist bekannt, dass Kunststoffrohre aufgrund ihrer vorteilhaften Betriebseigenschaften, wie Korrosions- und Chemikalienbeständigkeit, leichte Verlegbarkeit, Flexibilität, Lebensdauer, Verschleissfestigkeit, Kalt- und Warmbiegbarkeit, in den letzten Jahren mit grossem Erfolg für Trinkwasser-Hausinstallationen, Heizwassersysteme und anderes eingesetzt wurden. Zum Verbinden von Rohrabschnitten wurde bisher mit Erfolg das Thermo-Schweissverfahren verwendet, das im wesentlichen in zwei Varianten vorliegt.It is known that plastic pipes have been used with great success in recent years for drinking water domestic installations, heating water systems and other applications due to their advantageous operating properties, such as corrosion and chemical resistance, ease of installation, flexibility, service life, wear resistance, cold and hot bendability. The thermo-welding process, which essentially comes in two variants, has been used successfully to connect pipe sections.

Einerseits verwendet man hierzu die sogenannte Elektroschweissmuffe, eine aus unvernetztem Polyethylen bestehende, hohlzylindrische Muffe mit im Verbindungsbereich eingebetteter elektrischer Heizspule. Diese Heizspule bringt im erregten Zustand den sie umgebenden Werkstoff zum Schmelzen, der sich ausdehnt und beim Kontakt mit den in die Muffe hineinragenden Rohrenden dieselben ebenfalls oberflächlich zum Schmelzen bringt. Nach dem Erstarren des geschmolzenen Materials sind die beiden Rohre durch die Muffe fest miteinander verbunden.On the one hand, the so-called electrofusion sleeve is used for this purpose, a hollow cylindrical sleeve made of non-cross-linked polyethylene with an electric heating coil embedded in the connection area. When energized, this heating coil melts the material surrounding it, which expands and, when it comes into contact with the pipe ends protruding into the sleeve, also melts the surface of the pipe ends. After the molten material has solidified, the two pipes are firmly connected to one another by the sleeve.

Gemäss einer weiteren Variante, dem Heizelement-Muffenschweissen, wird die Innenfläche des einen und die Aussenfläche des anderen Rohrendes durch kurzzeitigen Kontakt mit einem entsprechend geformten elektrischen Heizelement bis zur Schmelztemperatur aufgeheizt, worauf die Rohrenden nur noch gegen einen vorgeformten Anschlag ineinandergeschoben werden müssen.According to another variant, heating element socket welding, the inner surface of one pipe end and the outer surface of the other pipe end are heated to the melting temperature by brief contact with an appropriately shaped electric heating element, after which the pipe ends only have to be pushed together against a pre-formed stop.

Es ist dem Fachmann ferner bekannt, dass Rohre aus vernetztem Polyethylen bisher als grundsätzlich nicht miteinander verschweissbar angesehen wurden, so dass sich die bekannten Schweissverfahren auf Rohre aus Polybuten,It is also known to the person skilled in the art that pipes made of cross-linked polyethylene have so far been considered fundamentally not weldable together, so that the known welding processes are limited to pipes made of polybutene,

Polypropylen und unvernetztem Polyethylen (PE) beschränkten. Die Nachteile dieser bisher als schweissbar erachteten Kunststoffe sind ebenfalls bekannt: Während das Polybuten aufgrund der Schwundmasse und schwer einhaltbarer Formtoleranzen eine schwierige Verarbeitung bzw. komplizierte Herstellung mit Neigung zur Rissbildung aufweist, benötigt das Polypropylen wegen seiner geringen Festigkeit ausserordentlich dicke Rohrwandungen und das unvernetzte Polyethylen ist nur für Kaltwasser geeignet, Polyvinylchlorid-Rohrverbindungen werden bekanntlich geklebt und werden im Hinblick auf deren Umwelt-Unfreundlichkeit (z.B. die Bildung von Salzsäure beim Verbrennen) nur ungern eingesetzt.polypropylene and non-crosslinked polyethylene (PE). The disadvantages of these plastics, which were previously considered weldable, are also known: while polybutene is difficult to process and complicated to manufacture with a tendency to crack due to shrinkage and difficult-to-maintain shape tolerances, polypropylene requires extremely thick pipe walls due to its low strength and non-crosslinked polyethylene is only suitable for cold water. Polyvinyl chloride pipe connections are known to be glued and are only used with reluctance due to their environmental unfriendliness (e.g. the formation of hydrochloric acid when burned).

Demgegenüber stehen die allgemein anerkannten vorteilhaften Eigenschaften des vernetzten Polyethylens, insbesondere dessen hohe Zeitstandfestigkeit, sowie Alterungsund Temperaturbeständigkeit, dessen Einsatz bisher am Vorurteil der Nicht-Schweissbarkeit scheiterte.In contrast, there are the generally recognized advantageous properties of cross-linked polyethylene, in particular its high creep strength, as well as ageing and temperature resistance, the use of which has so far failed due to the prejudice that it cannot be welded.

Es ist ferner eine der Fachwelt bekannte Tatsache, dass nur gleichartige Kunststoffe miteinander verschweisst werden können. Da das sogenannt vernetzte Polyethylen normalerweise immer noch ca. 30% unvernetzte Werkstoffanteile aufweist, wurde bereits versucht, Rohre aus einem derartigen Kunststoff mittels einer Schweissmuffe aus unvernetztem Kunststoff zu verbinden. Dies führt zwar aufgrund des unvernetzten Werkstoffanteils der Rohre zu einer Schweissverbindung, die aber wegen der geringen Dauerfestigkeit des zwangsläufig unvernetzten Muffenwerkstoffs keinen grossen Zug- und Temperaturbelastungen ausgesetzt werden darf. Das Rohrsystem würde somit im Verbindungsbereich eine unverantwortbare Schwachstelle aufweisen, deren mechanische Beanspruchbarkeit und Heisswasserbeständigkeit weit hinter denjenigen der aus vernetztem Polyethylen erstellten Rohre zurückbliebe. It is also a fact known to experts that only similar types of plastic can be welded together. Since so-called cross-linked polyethylene normally still contains around 30% uncross-linked material, attempts have already been made to connect pipes made of this type of plastic using a welding sleeve made of uncross-linked plastic. This does indeed result in a welded connection due to the uncross-linked material content of the pipes, but this cannot be exposed to large tensile and thermal loads due to the low fatigue strength of the inevitably uncross-linked sleeve material. The pipe system would therefore have an unacceptable weak point in the connection area, the mechanical strength and hot water resistance of which would be far behind those of pipes made of cross-linked polyethylene.

Es ist die Aufgabe der vorliegenden Erfindung, eine Schweissmuffe zur Erstellung einer Schweissverbindung an Rohren aus vernetzten! Polyethylen vorzuschlagen. Dabei soll die neue Schweissmuffe trotz Verwendung des unvernetzten Polyethylens, das sich gegenüber der vernetzten Variante durch geringere mechanische Beanspruchbarkeit auszeichnet, eine einwandfreie Abdichtung mit hoher Druck- und Zugbeanspruchbarkeit aufweisen, so daß die für vernetzte Polyethylenrohre bekannte hohe Zeitstandfestigkeit und Temperaturbeständigkeit nun auch für den Verbindungsbereich Geltung haben.The object of the present invention is to propose a welding sleeve for creating a welding connection on pipes made of cross-linked polyethylene. Despite the use of non-cross-linked polyethylene, which is characterized by lower mechanical strength compared to the cross-linked variant, the new welding sleeve should have a perfect seal with high compressive and tensile strength, so that the high creep strength and temperature resistance known for cross-linked polyethylene pipes now also apply to the connection area.

Diese Aufgabe wird gelöst durch die Kombination der Merkmale des /ynSpruches 1.This task is solved by combining the features of /ynSaying 1.

Nachstehend wird anhand der beiliegenden Zeichnung ein Ausführungsbeispiel nebst mehrerer Varianten beschrieben. Die Figuren 1 bis 5 der beiliegenden Zeichnung sind Schnittdarstellungen verschiedener Ausführungsformen des Erfindungsgegenstandes . An embodiment example and several variants are described below using the attached drawing. Figures 1 to 5 of the attached drawing are sectional views of various embodiments of the subject matter of the invention.

Fig. 1 zeigt zwei Rohre 1 und 2 aus vernetztemFig. 1 shows two pipes 1 and 2 made of cross-linked

Polyethylen, das hinfort der Einfachheit halber als VPE bezeichnet wird, während das unvernetzte Polyethylen als PE bezeichnet werden soll. Eine in ihrer Gesamtheit mit 3 bezeichnete Schweissmuffe ist zweiteilig aufgebaut. Eine Innenhülse 4 aus PE ist zwischen der Umfangsfläche der beiden Rohrenden und einer aus VPE bestehenden Aussenhülse 5 angeordnet, die mit Heizdrähten 6 versehene Innenhülse 4 ist in ihrem Mittelbereich geteilt und die Endabschnitte beiderPolyethylene, which will be referred to as VPE for the sake of simplicity, while the non-cross-linked polyethylene will be referred to as PE. A welding sleeve, designated as a whole by 3, is made up of two parts. An inner sleeve 4 made of PE is arranged between the peripheral surface of the two pipe ends and an outer sleeve 5 made of VPE, the inner sleeve 4 provided with heating wires 6 is divided in its middle area and the end sections of both

OQ Hülsenteile sind so abgewinkelt, daß sie einerseits die Randpartien der Aussenhülse 5, andererseits einen von der Aussenhülse 5 nach innen ragenden, zentralen Ringwulst 7 übergrei fen.OQ sleeve parts are angled in such a way that they overlap the edge parts of the outer sleeve 5 on the one hand and a central annular bead 7 projecting inwards from the outer sleeve 5 on the other.

Die flüssigkeitsdichte Verbindung der beiden RohreThe liquid-tight connection of the two pipes

1 und 2 lässt sich erzielen, indem die Schweissmuffe über die Rohrenden geschoben und beheizt wird. Das schmelzende Material der Innenhülse 4 dehnt sich dabei aus und verbindet sich mit den durch Kontakt ebenfalls aufgeheizten Nachbarteilen der Aussenhülse 5 und der Rohrenden.1 and 2 can be achieved by pushing the welding sleeve over the pipe ends and heating it. The melting material of the inner sleeve 4 expands and connects with the neighboring parts of the outer sleeve 5 and the pipe ends, which are also heated by contact.

Die axiale Gesamtlänge der Schweissmuffe kann den zu erwartenden Längsbeanspruchungen des Rohrsystems angepasst werden.The total axial length of the welding sleeve can be adapted to the expected longitudinal stresses of the pipe system.

Gemäss Fig. 2 ist über die VPE-Rohre 1 und 2 eine ebenfalls zweiteilige Schweissmuffe 7 geschoben. Diese besteht aus einer Innenhülse 8 aus Polyethylen mit eingebettetem Heizdraht 8a und einer dieselbe allseitig umgebenden Ummantelung 9 aus einem mechanisch beanspruchbaren Kunststoff (z.B. POM) oder Metall (z.B. Chromstahl). Je nach Material kann die Innenhülse 8 umspritzt oder das Polyethylen, das die Innenhülse 8 bildet, in die Aussenhülse 9 eingespritzt werden.According to Fig. 2, a welding sleeve 7, also made of two parts, is pushed over the VPE pipes 1 and 2. This consists of an inner sleeve 8 made of polyethylene with an embedded heating wire 8a and a sheath 9 made of a mechanically stressable plastic (e.g. POM) or metal (e.g. chrome steel) that surrounds the inner sleeve 8 on all sides. Depending on the material, the inner sleeve 8 can be overmolded or the polyethylene that forms the inner sleeve 8 can be injected into the outer sleeve 9.

Die an der Aussenfläche der Innenhülse 8 eingeformten Umfangsrippen 10 bzw. Ringnuten 11 ermöglichen die Uebertragung auch beträchtlicher Druck- und Zugkräfte in Längsrichtung.The circumferential ribs 10 or annular grooves 11 formed on the outer surface of the inner sleeve 8 enable the transmission of even considerable compressive and tensile forces in the longitudinal direction.

Die in Fig. 3 gezeigte Variante zeigt eine beide VPE Rohre 1 und 2 übergreifende einteilige Schweissmuffe 12 aus Polyethelyen, in welche ein Armierungsnetz 13 aus Stahldraht eingebettet ist. Anstelle des letzteren liesse sich beispielsweise auch ein ein perforiertes Stahlrohr einbetten. Der Heizdraht ist hier weggelassen, da das System auch für Muffenschweissung geeignet ist, bei welcher die Muffeninnen- und Rohraussenflachen mittels eines Heizwerkzeugs aufgeheizt werden.The variant shown in Fig. 3 shows a one-piece welding sleeve 12 made of polyethylene that spans both VPE pipes 1 and 2 and in which a reinforcing mesh 13 made of steel wire is embedded. Instead of the latter, a perforated steel pipe could also be embedded, for example. The heating wire is omitted here because the system is also suitable for sleeve welding, in which the inner and outer surfaces of the sleeve and pipe are heated using a heating tool.

Auch die in Fig. 4 dargestellte Ausführungsform zeigt eine einteilige Schweissmuffe aus Polyethylen. Die Vernetzung dieses Materials nimmt hier jedoch vom Aussenbereich A nach innen ab, so dass der mit den VPE-Rohren 1 undThe embodiment shown in Fig. 4 also shows a one-piece welding sleeve made of polyethylene. However, the cross-linking of this material decreases from the outer area A to the inside, so that the area with the VPE pipes 1 and

2 zu verschweissende Innenbereich I der Schweissmuffe 142 Inner area I of the welding sleeve to be welded 14

keine Vernetzung mehr aufweist. Auch auf diese Weise wird das angestrebte Ziel erreicht, eine gut verschweissbare und dennoch mechanisch und thermisch beanspruchbare Schweissmuffe zu erhalten, wobei hier der vernetzte Aussenbereich A der Schweissmuffe als Armierung dient und die auftretenden Zug- und Druckkräfte durch diesen Aussenbereich übertragen werden.no longer has any cross-linking. This also achieves the desired goal of obtaining a welding sleeve that is easy to weld and yet can withstand mechanical and thermal stress, whereby the cross-linked outer area A of the welding sleeve serves as reinforcement and the tensile and compressive forces that occur are transmitted through this outer area.

Die Variante nach Fig. 5 zeigt eine SchweissmuffeThe variant according to Fig. 5 shows a welding sleeve

15 aus VPE mit zwei eingeformten Hohlräumen 16 und 17, die im Querschnitt T-förmig ausgebildet sind und demgemäss je einen ringförmigen Verschweissungsabschnitt V und einen radialen Kanal K aufweisen. Nachdem die Schweissmuffe auf die VPE-Rohre 1 und 2 aufgesteckt wurde, wird in die Hohlräume15 made of VPE with two molded cavities 16 and 17, which are T-shaped in cross-section and accordingly each have an annular welding section V and a radial channel K. After the welding sleeve has been put on the VPE pipes 1 and 2,

16 und 17 über die Kanäle K unter Druck Polyethylen eingespritzt. Das flüssige Material soll die die Hohlräume 16 und16 and 17 through the channels K. The liquid material is intended to fill the cavities 16 and

17 umgrenzende Muffenfläche sowie die Rohre anschmelzen und verschweissen.17 Melt and weld the surrounding socket area and the pipes.

Claims (11)

A-M-S-P-B-Ü-C-H-EA-M-S-P-B-U-C-H-E 1. Schweissmuffe zur unlösbaren Verbindung zweier aus vernetzten! Polyethylen bestehender Rohre (1,2), wobei dieselbe einen Innendurchmesser aufweist , welcher gleich oder grosser als der Aussendurchmesser der zu verbindenden Rohrenden ist und im Hinblick auf die beabsichtigte Verschweissung mindestens an ihrer zu verschweissenden Innenseite, und zwar mindestens auf einem Teilbereich ihrer Gesamtlänge, aus unvernetztem Polyethylen (4) besteht und mit einer das unvernetzte Polyethylen umgebenden Armierung (5) versehen ist, welche die im Muffenbereich auftretenden mechanischen Beanspruchungen übernimmt.1. Welding sleeve for the permanent connection of two pipes (1, 2) made of cross-linked polyethylene, wherein the sleeve has an inner diameter which is equal to or larger than the outer diameter of the pipe ends to be connected and, with regard to the intended welding, consists of uncross-linked polyethylene (4) at least on its inner side to be welded, namely at least over a portion of its total length, and is provided with a reinforcement (5) surrounding the uncross-linked polyethylene, which absorbs the mechanical stresses occurring in the sleeve area. 2. Schweissmuffe nach Anspruch 1, dadurch gekennzeichnet, dass dieselbe aus zwei konzentrischen Hülsen (4,5; 8,9) besteht, deren innere (4,8) aus unvernetztem Polyethylen besteht und deren äussere (5,9) die Armierung bildet. (Fig. 1 und 2)2. Welding sleeve according to claim 1, characterized in that it consists of two concentric sleeves (4,5; 8,9), the inner sleeve (4,8) of which consists of non-crosslinked polyethylene and the outer sleeve (5,9) of which forms the reinforcement. (Fig. 1 and 2) 3. Schweissmuffe nach Anspruch 2, dadurch gekennzeichnet, dass die äussere (5) der beiden konzentrischen Hülsen (4,5) aus vernetztem Polyethylen besteht. (Fig. 1)3. Welding sleeve according to claim 2, characterized in that the outer (5) of the two concentric sleeves (4, 5) consists of cross-linked polyethylene. (Fig. 1) 4. Schweissmuffe nach Anspruch 3, dadurch gekenn-4. Welding sleeve according to claim 3, characterized in zeichnet, dass die innere (4) der beiden konzentrischen Hülsen geteilt ist und deren beide Teile mit ihren abgewinkelten Endabschnitten sowohl die Randpartien als auch einen nach innen ragenden zentralen Ringwulst (7) der äusseren Hülse (5) umgrei fen. (Fig. 1 )characterized in that the inner (4) of the two concentric sleeves is divided and both parts with their angled end sections encompass both the edge parts and an inwardly projecting central annular bead (7) of the outer sleeve (5). (Fig. 1 ) 5. Schweissmuffe nach Anspruch 2, dadurch gekennzeichnet, dass die äussere Hülse (9) aus einem beliebigen, mechanisch hochbeanspruchbaren Kunststoff oder einem entsprechenden Metall, z.B. Chromstahl, besteht und die innere5. Welding sleeve according to claim 2, characterized in that the outer sleeve (9) consists of any mechanically highly stressable plastic or a corresponding metal, e.g. chrome steel, and the inner Hülse (8) in Form einer Ummantelung übergreift (Fig. 2).Sleeve (8) in the form of a sheath (Fig. 2). 6. Schweissmuffe nach Anspruch 5, dadurch gekennzeichnet, dass im Verbindungsbereich zwischen der inneren (8) und der äusseren Hülse (9) peripherische Rippen bzw. Nuten
(10, 11) zur besseren Uebertragung auftretender Längskräfte eingeformt sind (Fig. 2).6. Welding sleeve according to claim 5, characterized in that in the connection area between the inner (8) and the outer sleeve (9) peripheral ribs or grooves
(10, 11) for a better transmission of occurring longitudinal forces (Fig. 2). 7. Schweissmuffe nach Anspruch 1, dadurch gekennzeichnet, dass dieselbe (12) einteilig aus unvernetztem Polyethylen hergestellt und mit einem in dieselbe eingebetteten Armierungsnetz (13) bzw. einem perforierten Metallrohr
versehen ist (Fig. 3).7. Welding sleeve according to claim 1, characterized in that the same (12) is made in one piece from non-crosslinked polyethylene and is provided with a reinforcing net (13) embedded in the same or a perforated metal pipe
(Fig. 3). 8. Schweissmuffe nach Anspruch 1, dadurch gekennzeichnet, dass dieselbe (14) einteilig aus Polyethylen hergestellt ist, dessen Vernetzung von der Aussenseite (A) der Schweissmuffe nach innen abnimmt, so dass der den zu verbindenden Rohrenden zugewandte Muffenwerkstoff (I) keine Ver-8. Welding sleeve according to claim 1, characterized in that the same (14) is made in one piece from polyethylene, the cross-linking of which decreases from the outside (A) of the welding sleeve inwards, so that the sleeve material (I) facing the pipe ends to be connected does not show any netzung mehr aufweist (Fig. 4).no longer has any wetting (Fig. 4). 9. Schweissmuffe nach Anspruch 1, dadurch gekennzeichnet, dass dieselbe in ihrem aus vernetztem Polyethylen bestehnden Grundkörper Hohlräume (16, 17) aufweist, die sich auf der Innenseite der Schweissmuffe (15) erweitern und mit nach aussen geführten Kanälen (K) zum Einspritzen flüssigen, unvernetzten Polyethylens versehen sind (Fig. 5).9. Welding sleeve according to claim 1, characterized in that it has cavities (16, 17) in its base body consisting of cross-linked polyethylene, which expand on the inside of the welding sleeve (15) and are provided with outwardly directed channels (K) for injecting liquid, non-cross-linked polyethylene (Fig. 5). 10. Schweissmuffe nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass in dem aus unvernetztem Polyethylen bestehenden Teil derselben eine elektrische Heizspule eingebettet ist.10. Welding sleeve according to one of claims 1 to 9, characterized in that an electrical heating coil is embedded in the part thereof consisting of non-crosslinked polyethylene. 11. Schweissmuffe nach Anspruch 7, dadurch gekennzeichnet, dass das Armierungsnetz bzw. Metallrohr als elektrisches Heizelement dient.11. Welding sleeve according to claim 7, characterized in that the reinforcing mesh or metal pipe serves as an electrical heating element.
DE9208024U 1991-06-18 1992-06-15 Welding sleeve for plastic pipes Expired - Lifetime DE9208024U1 (en)

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Application Number Priority Date Filing Date Title
CH1807/91A CH683026A5 (en) 1991-06-18 1991-06-18 Welded coupling sleeve for crosslinked polyethylene@ pipe - has non-crosslinked polyethylene@ inner layer and outer reinforcement

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EP0555684A1 (en) * 1992-02-08 1993-08-18 Georg Fischer Rohrleitungssysteme AG Welding socket and method for its manufacture
EP0635354A1 (en) * 1993-07-23 1995-01-25 Streng Plastic AG Electrofusion coupler
WO1996029194A1 (en) * 1995-03-21 1996-09-26 Uponor Limited Manufacture of electrofusion fittings
EP0693652A3 (en) * 1994-07-21 1996-10-23 Hitachi Metals Ltd Electric welding pipe joint
WO1997049540A1 (en) * 1996-06-25 1997-12-31 Uponor B.V. Electrofusion fitting
US5916468A (en) * 1996-07-08 1999-06-29 Hitachi Metals Ltd. Electrically weldable pipe joint and production method thereof
EP2253876A1 (en) * 2009-04-17 2010-11-24 Zaklad Produkcyjno Uslugowy Miedzyrzecz Polskie Rury Preizolowane SP. Z O.O. Heat shrinkable sleeve and heatshrinkable sleeve manufacturing method
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US6406063B1 (en) 1999-07-16 2002-06-18 Fina Research, S.A. Pipe fittings
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EP0555684A1 (en) * 1992-02-08 1993-08-18 Georg Fischer Rohrleitungssysteme AG Welding socket and method for its manufacture
EP0635354A1 (en) * 1993-07-23 1995-01-25 Streng Plastic AG Electrofusion coupler
EP0693652A3 (en) * 1994-07-21 1996-10-23 Hitachi Metals Ltd Electric welding pipe joint
US5618065A (en) * 1994-07-21 1997-04-08 Hitachi Metals, Ltd. Electric welding pipe joint having a two layer outer member
WO1996029194A1 (en) * 1995-03-21 1996-09-26 Uponor Limited Manufacture of electrofusion fittings
WO1997049540A1 (en) * 1996-06-25 1997-12-31 Uponor B.V. Electrofusion fitting
US5916468A (en) * 1996-07-08 1999-06-29 Hitachi Metals Ltd. Electrically weldable pipe joint and production method thereof
EP2253876A1 (en) * 2009-04-17 2010-11-24 Zaklad Produkcyjno Uslugowy Miedzyrzecz Polskie Rury Preizolowane SP. Z O.O. Heat shrinkable sleeve and heatshrinkable sleeve manufacturing method
CN108202481A (en) * 2016-12-20 2018-06-26 安讯士有限公司 A kind of alignment members and the method for alignment sensor plate
EP3340599A1 (en) * 2016-12-20 2018-06-27 Axis AB An alignment member and a method for aligning a sensor board
CN108202481B (en) * 2016-12-20 2019-05-21 安讯士有限公司 A kind of alignment members and the method for alignment sensor plate
US10432832B2 (en) 2016-12-20 2019-10-01 Axis Ab Alignment member and a method for aligning a sensor board

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