DE4444097A1 - Welding sleeve for metal pipes with plastic outer and inner skin - Google Patents

Welding sleeve for metal pipes with plastic outer and inner skin

Info

Publication number
DE4444097A1
DE4444097A1 DE19944444097 DE4444097A DE4444097A1 DE 4444097 A1 DE4444097 A1 DE 4444097A1 DE 19944444097 DE19944444097 DE 19944444097 DE 4444097 A DE4444097 A DE 4444097A DE 4444097 A1 DE4444097 A1 DE 4444097A1
Authority
DE
Germany
Prior art keywords
connecting device
sleeve
section
plastic
resistance heating
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
DE19944444097
Other languages
German (de)
Other versions
DE4444097C2 (en
Inventor
Horst Rahn
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.)
UPONOR ROHRSYSTEME GMBH, 97437 HASSFURT, DE
Original Assignee
UNICOR ROHRSYSTEME GmbH
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 UNICOR ROHRSYSTEME GmbH filed Critical UNICOR ROHRSYSTEME GmbH
Priority to DE19944444097 priority Critical patent/DE4444097C2/en
Publication of DE4444097A1 publication Critical patent/DE4444097A1/en
Application granted granted Critical
Publication of DE4444097C2 publication Critical patent/DE4444097C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B29C65/02—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
    • B29C65/3432—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 comprising several wires, e.g. in the form of several independent windings
    • 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
    • B29C66/01—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
    • B29C66/1226—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 one bevelled 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
    • B29C66/5223—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces
    • B29C66/52231—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces with a right angle, e.g. for making L-shaped pieces
    • 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
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • 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
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52294—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being heated
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • 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"
    • B29C65/3468—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 means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • 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
    • 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
    • B29C66/347—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients
    • 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
    • B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
    • B29K2305/02—Aluminium
    • 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
    • B29K2305/08—Transition metals
    • B29K2305/10—Copper
    • 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
    • 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
    • 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
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • 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
    • B29L2031/246—T-joints

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Two composite pipes (20) with a metal core (26) between synthetic outer (24) and inner (22) layers are joined by welding into a junction sleeve (10). The pipes (20) fit into sections (14) equipped with resistance heating elements (32). Each section (14) has an interior abutment surface (18) formed on the interior of the junction sleeve (10). The resistance heating element (36) of each section has a further part (38) in the vicinity of the abutment surface (18).

Description

Die Erfindung betrifft eine Einrichtung zum Verbinden von mindestens zwei Kunststoff-Metall-Verbundrohren durch Verschweißen, wobei die Verbundrohre eine Kunststoff- Außenschicht, eine Kunststoff-Innenschicht und zwischen diesen beiden Schichten eine Metallschicht aufweisen, und wobei die Verbindungseinrichtung mit hülsenförmigen Einsteckabschnitten für die Verbundrohre ausgebildet und mit einem elektrischen Widerstandsheizelement versehen ist.The invention relates to a device for connecting through at least two plastic-metal composite pipes Welding, the composite pipes being a plastic Outer layer, a plastic inner layer and between them both layers have a metal layer, and wherein the Connection device with sleeve-shaped insertion sections trained for the composite pipes and with an electrical Resistance heating element is provided.

Eine solche Verbindungseinrichtung ist aus der EP 0 604 907 A1 bekannt. Diese bekannte Verbindungseinrichtung ist primär zum verbindenden Verschweißen von Mehrschichtrohren vorgesehen, die aus einem Innenrohr und aus einer das Innenrohr schützenden Außenlage bestehen. Um zwei derartige Rohre miteinander zu verschweißen, ist es dort erforderlich, den entsprechenden Abschnitt der Außenlage vom Innenrohr zu entfernen. Das bedingt einen nicht zu vernachlässigenden Aufwand. Um die schützende Außenlage relativ einfach vom zugehörigen Innenrohr abschnittweise ablösen zu können, wird dort u. a. vorgeschlagen, zwischen der Außenlage und dem Innenrohr eine dünne Aluminiumschicht vorzusehen. Diese Aluminiumschicht kann außerdem als Sperrschicht dienen. Sie kann eine Dicke von 0,1 bis 0,3 mm aufweisen.Such a connecting device is known from EP 0 604 907 A1 known. This known connection device is primarily for connecting welding of multilayer pipes provided that from an inner tube and from a protective tube protecting the inner tube Outside location exist. To two such pipes together weld, it is necessary there, the appropriate Remove section of the outer layer from the inner tube. That requires a not insignificant effort. To the protective External position relatively easy from the associated inner tube  To be able to replace in sections, there u. a. suggested a thin layer between the outer layer and the inner tube Aluminum layer. This aluminum layer can also serve as a barrier. It can have a thickness of 0.1 up to 0.3 mm.

Der Erfindung liegt die Aufgabe zugrunde, eine Verbindungseinrichtung der eingangs genannten Art zu schaffen, mit welcher es einfach und zuverlässig möglich ist, mindestens zwei Kunststoff-Metall-Verbundrohre miteinander durch Verschweißen dicht zu verbinden, wobei die Metallschichten der Verbundrohre gut gegen äußere Einflüsse und Einwirkungen geschützt sind.The invention has for its object a To create a connection device of the type mentioned at the outset, with which it is easily and reliably possible, at least two plastic-metal composite pipes with each other Welding to connect tightly, the metal layers of the Composite pipes are good against external influences and influences are protected.

Diese Aufgabe wird bei einer Verbindungseinrichtung der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß jeder hülsenförmige Einsteckabschnitt durch eine im Inneren der Verbindungseinrichtung umlaufende Stoßfläche begrenzt ist und das Widerstandsheizelement mit einem ersten Abschnitt im Bereich des jeweiligen hülsenförmigen Einsteckabschnittes und mit einem zweiten Abschnitt im Bereich der jeweils zugehörigen Stoßfläche vorgesehen ist. Durch die Stoßflächen ergibt sich eine genaue Begrenzung der Einsteckbewegung der Kunststoff- Metall-Verbundrohre in bezug auf die Verbindungseinrichtung, wobei die Verbundrohre mit ihren jeweiligen Stirnflächen eng an dem Stoßflächen der Verbindungseinrichtung anliegen. Dadurch, daß das Widerstandsheizelement mit einem ersten Abschnitt im Bereich des jeweiligen hülsenförmigen Einsteckabschnittes und mit einem zweiten Abschnitt im Bereich der jeweils zugehörigen Stoßfläche vorgesehen ist, ergibt sich der besondere Vorteil, daß sich der Verschweißvorgang nicht nur auf den hülsenförmigen Einsteckabschnitt und die zugehörige Außenfläche des jeweiligen Verbundrohres erstreckt, sondern außerdem auch auf die an diese Außenfläche angrenzende Stirnfläche des jeweiligen
Verbundrohres, so daß die entsprechende Metallzwischenschicht in die Schweißstelle allseitig eingebettet ist. Die Metallschicht liegt also an keiner Stelle frei, so daß eine Korrosion derselben zuverlässig verhindert wird.This object is achieved according to the invention in a connecting device of the type mentioned at the outset in that each sleeve-shaped insertion section is delimited by a circumferential abutment surface in the interior of the connecting device and the resistance heating element is provided with a first section in the area of the respective sleeve-shaped insertion section and with a second section in the area of the respective associated joint surface is provided. The abutting surfaces result in a precise limitation of the insertion movement of the plastic-metal composite pipes with respect to the connecting device, the composite pipes with their respective end faces lying closely against the abutting surfaces of the connecting device. The fact that the resistance heating element is provided with a first section in the area of the respective sleeve-shaped plug-in section and with a second section in the area of the associated butting surface results in the particular advantage that the welding process does not only affect the sleeve-shaped plug-in section and the associated outer surface of the extends respective composite tube, but also on the end face of the respective adjoining this outer surface
Composite pipe, so that the corresponding metal intermediate layer is embedded on all sides in the weld. The metal layer is therefore not exposed at any point, so that corrosion of the same is reliably prevented.

Bei der erfindungsgemäßen Verbindungseinrichtung kann die jeweilige Stoßfläche zur Mittelachse des zugehörigen hülsenförmigen Einsteckabschnittes senkrecht orientiert sein. Eine derartige Ausbildung weist den Vorteil auf, daß sie zur Verbindung von einfach gerade abgetrennten Verbundrohren geeignet ist. Das heißt, die miteinander zu verbindenden Enden von Verbundrohren brauchen hierbei also nicht speziell bearbeitet zu werden.In the connecting device according to the invention, the respective abutting surface to the central axis of the associated sleeve-shaped insertion section to be oriented vertically. Such training has the advantage that it is Connection of simply separated composite pipes suitable is. That is, the ends to be joined together So composite pipes do not need special to be processed.

Als vorteilhaft hat es sich jedoch erwiesen, wenn die jeweilige Stoßfläche mit der Mittelachse des zugehörigen hülsenförmigen Einsteckabschnittes einen Konuswinkel einschließt, weil durch eine derartige Ausbildung eine sehr zuverlässige Verschweißung des jeweiligen Rohrendes mit der Verbindungseinrichtung erzielt wird. Als vorteilhaft hat es sich hierbei erwiesen, wenn der mit der Mittelachse des entsprechenden Verbundrohres eingeschlossene Konuswinkel der jeweiligen Stoßfläche der Verbindungseinrichtung und somit der diesem Konuswinkel entsprechende Konuswinkel der Stirnfläche des Verbundrohres größenordnungsmäßig 75 bis 80 Winkelgrad beträgt.However, it has proven to be advantageous if the respective Butt surface with the central axis of the associated sleeve-shaped Insert section includes a cone angle because of such a training a very reliable welding of the respective pipe end achieved with the connecting device becomes. It has proven to be advantageous here if the with the central axis of the corresponding composite pipe included cone angle of the respective abutting surface of the Connection device and thus this cone angle corresponding cone angle of the end face of the composite pipe is on the order of 75 to 80 degrees.

Bei der erfindungsgemäßen Verbindungseinrichtung hat es sich als zweckmäßig erwiesen, wenn die jeweilige Stoßfläche eine radiale Abmessung aufweist, die größer ist als die Summe aus der Wanddicke der Kunststoff-Außenschicht und der Metallschicht des zugehörigen Verbundrohres. Durch eine derartige Dimensionierung wird sichergestellt, daß die Metallschicht des entsprechenden Verbundrohres von der zugehörigen Stoßfläche allseitig bedeckt wird, so daß nach der Verschweißung die entsprechende Metallschicht in das Schweißmaterial der Verbindungseinrichtung allseitig eingebettet ist. Hierdurch werden - wie bereits erwähnt worden ist - Korrosionen der Metallschicht zuverlässig verhindert.It has been the case with the connecting device according to the invention proven to be useful if the respective butt surface a has radial dimension that is greater than the sum of the wall thickness of the plastic outer layer and the metal layer of the associated composite pipe. By such Dimensioning ensures that the metal layer of the corresponding composite pipe from the associated joint surface is covered on all sides, so that after welding  appropriate metal layer in the welding material of the Connection device is embedded on all sides. Hereby - as has already been mentioned - corrosion of the Metal layer reliably prevented.

Zweckmäßig kann es bei einer Verbindungseinrichtung der zuletzt genannten Art sein, wenn die jeweilige Stoßfläche eine radiale Abmessung aufweist, die größer ist als die Wanddicke des zugehörigen Verbundrohres. Eine solchermaßen ausgebildete Verbindungseinrichtung eignet sich zum Verschweißen von Verbundrohren verschiedener Wanddicken. Um an der Stirnfläche des jeweiligen Verbundrohres eine zuverlässige Verschweißung mit der Verbindungseinrichtung im Bereich der entsprechenden Stoßfläche zu erzielen, ist es bevorzugt, wenn das Widerstandsheizelement derartig ausgebildet ist, daß seine spezifische Heizleistung im ersten Abschnitt von der im zweiten Abschnitt verschieden ist. Dabei kann die spezifische Heizleistung, d. h. die Heizleistung pro Flächeneinheit im zweiten Abschnitt, d. h. im Bereich der jeweils zugehörigen Stoßfläche, größer sein als die spezifische Heizleistung im ersten Abschnitt, d. h. im Bereich des jeweiligen hülsenförmigen Einsteckabschnittes der Verbundeinrichtung, weil durch die jeweilige Metallzwischenschicht des Verbundrohres eine vergleichsweise schnelle Wärmeableitung erfolgt. Um diese nicht gewollte Wärmeableitung zu kompensieren, kann es zweckmäßig sein, die spezifische Heizleistung im zweiten Abschnitt größer zu wählen als im ersten Abschnitt.It may be expedient for the last connection device mentioned type if the respective abutting surface is radial Dimension that is greater than the wall thickness of the associated composite pipe. Such a trained one Connection device is suitable for welding Composite pipes of different wall thicknesses. To on the face reliable welding of the respective composite pipe with the connection device in the area of the corresponding To achieve the butt surface, it is preferred if that Resistance heating element is designed such that its specific heating power in the first section from that in the second Section is different. The specific Heating power, d. H. the heating power per unit area in second section, d. H. in the area of the associated Butt area, larger than the specific heating output in the first section, d. H. in the area of the respective sleeve-shaped Insertion section of the composite device because of the respective metal intermediate layer of the composite pipe one comparatively fast heat dissipation takes place. Not this To compensate for desired heat dissipation, it can be useful be, the specific heating output in the second section is larger to choose than in the first section.

Zur Vermeidung unerwünschter elektrolytischer bzw. galvanischer Vorgänge kann es vorteilhaft sein, wenn das Widerstandsheizelement aus dem gleichen Material besteht wie die Metallzwischenschicht des jeweiligen Verbundrohres. Besteht die Zwischenschicht des entsprechenden Verbundrohres bspw. aus Aluminium, so kann es vorteilhaft sein, auch das
Widerstandsheizelement der Verbindungseinrichtung aus Aluminium zu realisieren. Entsprechendes gilt für Kupfer o. dgl. als Material für die Metallzwischenschicht und für das Widerstandsheizelement. Das Widerstandsheizelement kann von einem entsprechenden Drahtmaterial gebildet sein. Desgleichen wäre es möglich, das Widerstandsheizelement durch einen Folienstreifen oder durch ein Netz bzw. Gitter o. dgl. zu realisieren.To avoid undesired electrolytic or galvanic processes, it can be advantageous if the resistance heating element consists of the same material as the metal intermediate layer of the respective composite pipe. If the intermediate layer of the corresponding composite pipe is made of aluminum, for example, it may be advantageous to do that
Resistance heating element of the connecting device made of aluminum. The same applies to copper or the like as material for the metal intermediate layer and for the resistance heating element. The resistance heating element can be formed from a corresponding wire material. Likewise, it would be possible to implement the resistance heating element by means of a film strip or by means of a net or grid or the like.

Die erfindungsgemäße Verbindungseinrichtung kann als gerade Hülse mit zwei voneinander abgewandten Einsteckabschnitten ausgebildet sein, wobei die zugehörigen Stoßflächen an einem im Inneren der Verbindungseinrichtung umlaufenden Wulst eng benachbart ausgebildet sind. Die Verbindungseinrichtung kann jedoch auch als Hülsen-Winkelstück mit mindestens zwei Einsteckabschnitten ausgebildet sein, die miteinander jeweils einen bestimmten Winkel einschließen. Eine Verbindungseinrichtung der zuletzt genannten Art kann z. B. als T-Stück ausgebildete sein. Unabhängig davon, welche Gestalt die erfindungsgemäße Verbindungseinrichtung besitzt, kommt zum Anschließen der entsprechenden Kunststoff-Metall-Verbundrohre stets dieselbe Anschlagtechnik zur Anwendung, wobei die Einsteckbewegung der Verbundrohre in bezug auf die Verbindungseinrichtung durch die im Inneren der Verbindungseinrichtung vorgesehenen umlaufenden Stoßflächen definiert begrenzt wird.The connecting device according to the invention can be straight Sleeve with two insertion sections facing away from each other be formed, the associated abutting surfaces on an im Inside the connecting device circumferential bead tight are formed adjacent. The connection device can but also as a sleeve contra-angle with at least two Insert sections to be formed, each with each other enclose a certain angle. A Connection device of the latter type can, for. B. as Be tee trained. Regardless of what shape the has connecting device according to the invention comes to Connect the corresponding plastic-metal composite pipes always use the same attachment technique, whereby the Insertion movement of the composite pipes in relation to the Connection device through the inside of the Connection device provided all-round abutting surfaces defined is limited.

Durch geeignete Materialauswahl ist die erfindungsgemäße Verbindungseinrichtung nicht nur für Rohre verwendbar, die in einem relativ niedrigen Temperaturbereich wie z. B. bei Kaltwasser-Rohrleitungen, Abflußleitungen oder Gasleitungen zur Anwendung gelangen, sondern auch für Kunststoffrohre, die in einem vergleichsweise hohen Temperaturbereich zur Anwendung gelangen. Bei solchen Kunststoffrohren z. B. für Heißwasser- Anwendungen kann es sich um Rohre aus vernetztem Kunststoff handeln. Kommt die erfindungsgemäße Verbindungseinrichtung für einen solchen höheren Temperaturbereich, z. B. für Heißwasser- Rohrleitungen, zum Einsatz, so besteht die Verbindungseinrichtung selbst ebenfalls aus einem wärmebeständigen Kunststoffmaterial.The material according to the invention is selected by suitable choice of material Connection device can not only be used for pipes that are in a relatively low temperature range such as B. at Cold water pipelines, drain pipes or gas pipes for Application, but also for plastic pipes that in a comparatively high temperature range reach. In such plastic pipes z. B. for hot water  Applications can be pipes made of cross-linked plastic act. The connection device according to the invention comes for such a higher temperature range, e.g. B. for hot water Pipelines, so there is Connection device itself also from one heat-resistant plastic material.

Weitere Einzelheiten, Merkmale und Vorteile ergeben sich aus der nachfolgenden Beschreibung von in der Zeichnung dargestellten Ausführungsbeispielen der erfindungsgemäßen Verbindungseinrichtung in Kombination mit abschnittweise gezeichneten Kunststoff-Metall-Verbundrohren. Es zeigen:Further details, features and advantages result from the following description of in the drawing illustrated embodiments of the invention Connection device in combination with sections drawn plastic-metal composite pipes. Show it:

Fig. 1 halbseitig längsgeschnitten eine erste Ausbildung der Verbindungseinrichtung gemeinsam mit zwei Endabschnitten von Kunststoff-Metall-Verbundrohren, Fig. 1 half side cut longitudinally a first embodiment of the connecting device together with two end portions of plastic-metal composite tubes,

Fig. 2 eine Schnittdarstellung einer zweiten Ausführungsform der Verbindungseinrichtung in Kombination mit zwei Endabschnitten von Kunststoff- Metall-Verbundrohren, Fig. 2 is a sectional view of a second embodiment of the connecting device in combination with two end portions of plastic-metal composite tubes,

Fig. 3 halbseitig aufgeschnitten eine dritte Ausführungsform der Verbindungseinrichtung, die als Hülsen-Winkelstück ausgebildet ist, in Kombination mit zwei Endabschnitten von Kunststoff-Metall- Verbundrohren, und Fig. 3 cut open on one side a third embodiment of the connecting device, which is designed as a sleeve elbow, in combination with two end sections of plastic-metal composite pipes, and

Fig. 4 eine als T-Stück ausgebildete Verbindungseinrichtung teilweise aufgeschnitten in Kombination mit drei Kunststoff-Metall- Verbundrohren, die jeweils nur abschnittweise gezeichnet sind. Fig. 4 is a T-piece connecting device partially cut in combination with three plastic-metal composite pipes, which are only drawn in sections.

Fig. 1 zeigt eine Verbindungseinrichtung 10, die als gerade Hülse 12 aus einem geeigneten Kunststoffmaterial ausgebildet ist. Die Hülse 12 ist mit zwei voneinander abgewandten Einsteckabschnitten 14 ausgebildet, die durch einen gemeinsamen mittigen Wulst 16 begrenzt sind, der im Inneren der als Hülse 12 ausgebildeten Verbindungseinrichtung 10 umläuft. Der Wulst 16 ist durch zwei voneinander abgewandte Stoßflächen 18 bestimmt. Die Stoßflächen 18 dienen zur Begrenzung der Einsteckabschnitte 14 der Hülse 12 bzw. zur definierten Begrenzung der Einsteckbewegung zweier miteinander durch Verschweißen zu verbindender Kunststoff-Metall-Verbundrohre 20. Jedes Verbundrohr 20 weist eine Kunststoff-Innenschicht 22, eine Kunststoff-Außenschicht 24 und zwischen der Innen- und Außenschicht 22, 24 eine Metallzwischenschicht 26 auf. Ein solches Kunststoff-Metall-Verbundrohr mit einer Metallzwischenschicht aus Kupfer ist im DE-GM 92 107 699 der Anmelderin offenbart. Fig. 1 shows a connecting device 10 which is designed as a straight sleeve 12 made of a suitable plastic material. The sleeve 12 is formed with two insertion sections 14 facing away from one another, which are delimited by a common central bead 16 which rotates in the interior of the connecting device 10 designed as a sleeve 12 . The bead 16 is determined by two abutting surfaces 18 facing away from one another. The abutting surfaces 18 serve to limit the insertion sections 14 of the sleeve 12 or to define the insertion movement of two plastic-metal composite pipes 20 to be connected to one another by welding. Each composite pipe 20 has an inner plastic layer 22 , an outer plastic layer 24 and an intermediate metal layer 26 between the inner and outer layers 22 , 24 . Such a plastic-metal composite pipe with an intermediate metal layer made of copper is disclosed in DE-GM 92 107 699 by the applicant.

Bei dem in Fig. 1 gezeichneten Ausführungsbeispiel sind die beiden den umlaufenden Wulst 16 festlegenden Stoßflächen 18 der Verbindungseinrichtung 10 zur Mittelachse 28 der hülsenförmigen Einsteckabschnitte 14 der Verbindungseinrichtung 10 und somit zur Mittelachse der miteinander durch Verschweißen zu verbindenden Endabschnitte der Verbundrohre 20 senkrecht orientiert. Entsprechend sind die ringförmigen Stirnflächen 30 der Verbundrohre 20 zur Mittelachse 28 einfach senkrecht orientiert.In the embodiment shown in FIG. 1, the two abutting surfaces 18 of the connecting device 10 which define the circumferential bead 16 are oriented perpendicular to the central axis 28 of the sleeve-shaped insertion sections 14 of the connecting device 10 and thus to the central axis of the end sections of the composite pipes 20 which are to be connected by welding. Correspondingly, the annular end faces 30 of the composite pipes 20 are oriented simply perpendicular to the central axis 28 .

Die Verbindungseinrichtung 10 ist mit einem Widerstandsheizelement 32 versehen, das aus einem gewendelten Widerstandsdraht besteht, der mit zwei Anschlußenden 34 aus der Verbindungseinrichtung 10 herausragt. Das Widerstandsheizelement 32 weist im Bereich des jeweiligen hülsenförmigen Einsteckabschnittes 14 einen ersten Abschnitt 36 und im Bereich der jeweils zugehörigen Stoßfläche 18 einen zweiten Abschnitt 38 auf, wobei es sich als vorteilhaft erwiesen hat, wenn die spezifische Heizleistung, d. h. die Heizleistung des Widerstandsheizelementes 32 im ersten Abschnitt 36 von der spezifischen Heizleistung im zweiten Abschnitt 38 verschieden ist, um nach der entsprechenden Beaufschlagung des Widerstandsheizelementes 32 mit elektrischem Strom eine Verschweißung der Verbindungseinrichtung 10 nicht nur zwischen den Einsteckabschnitten 14 und den angrenzenden Außenflächenabschnitten 40 der Verbundrohre 20 zu erzielen, sondern außerdem auch eine Verschweißung zwischen den ringförmigen Stirnflächen 30 der Verbundrohre 20 und den durch die Stoßflächen 18 begrenzten Abschnitten der Verbindungseinrichtung 10, d. h. der Stirnflächen 30 der Verbundrohre 10 mit dem innen umlaufenden Wulst 16 der Verbindungseinrichtung 10. Der Wulst 16 bzw. die Stoßflächen 18 des Wulstes 16 weisen eine radiale Abmessung a auf, die größer ist als die Summe aus der Wanddicke b der Kunststoff- Außenschicht 24 und der Wanddicke c der Metallschicht 26 des jeweiligen Verbundrohres 20, so daß beim Verschweißen der Verbundrohre 20 mit der Verbindungseinrichtung 10 die Metallzwischenschicht 26 durch den Wulst 16 allseitig bedeckt und somit gegen Einflüsse des die Verbundrohre 20 durchströmenden Mediums zuverlässig geschützt ist. Das bedeutet, daß z. B. eine Korrosion der Metallzwischenschichten 26 der miteinander durch Verschweißen verbundenen Verbundrohre 20 zuverlässig verhindert werden.The connecting device 10 is provided with a resistance heating element 32 , which consists of a coiled resistance wire which projects out of the connecting device 10 with two connecting ends 34 . The resistance heating element 32 has a first portion 36 in the area of the respective sleeve-shaped insertion portion 14 and a second portion 38 in the area of the respectively associated abutting surface 18 , it having proven to be advantageous if the specific heating power, ie the heating power of the resistance heating element 32 in the first Section 36 is different from the specific heating power in the second section 38 , in order to achieve a welding of the connecting device 10 not only between the insertion sections 14 and the adjacent outer surface sections 40 of the composite pipes 20 , but also also after the corresponding application of electrical current to the resistance heating element 32 welding between the annular end surfaces 30 of the composite pipes 20 and limited by the abutment surfaces 18 portions of the connection means 10, ie the end faces 30 of the composite pipes 10 with the internal circumferential bead 16 of the Connection device 10 . The bead 16 or the abutment surfaces 18 of the bead 16 have a radial dimension a, which is greater than the sum of the wall thickness b of the plastic outer layer 24 and the wall thickness c of the metal layer 26 of the respective composite pipe 20 , so that when welding the Composite pipes 20 with the connecting device 10 cover the metal intermediate layer 26 on all sides by the bead 16 and are thus reliably protected against influences of the medium flowing through the composite pipes 20 . That means that e.g. B. corrosion of the metal intermediate layers 26 of the composite pipes 20 connected to one another by welding can be reliably prevented.

Fig. 2 zeigt eine Ausbildung der Verbindungseinrichtung 10, die sich von der in Fig. 1 dargestellten Ausführungsform der Verbindungseinrichtung 10 insbes. dadurch unterscheidet, daß der im Inneren der als gerade Hülse 12 ausgebildeten Verbindungseinrichtung 10 umlaufende Wulst 16 mit voneinander abgewandten Stoßflächen 18 ausgebildet ist, die mit der Mittelachse 28 des zugehörigen hülsenförmigen Einsteckabschnittes 14 der Verbindungseinrichtung 10 einen Konuswinkel k einschließen, der von 90 Winkelgrad verschieden ist. Der Konuswinkel k beträgt vorzugsweise größenordnungsmäßig 75 bis 80 Winkelgrad. Der konischen Ausbildung des Wulstes 16 bzw. der Stoßflächen 18 des Wulstes 16 entsprechend sind die ringförmigen Stirnflächen 30 der beiden miteinander durch Schweißen zu verbindenden Endabschnitte der Verbundrohre 20 konisch gestaltet. FIG. 2 shows a design of the connecting device 10 , which differs from the embodiment of the connecting device 10 shown in FIG. 1 in particular in that the bead 16 running around the inside of the connecting device 10 designed as a straight sleeve 12 is formed with abutting surfaces 18 facing away from one another which enclose with the central axis 28 of the associated sleeve-shaped insertion section 14 of the connecting device 10 a cone angle k which is different from 90 degrees. The cone angle k is preferably on the order of 75 to 80 degrees. Corresponding to the conical shape of the bead 16 or the abutting surfaces 18 of the bead 16 , the annular end faces 30 of the two end sections of the composite pipes 20 to be connected to one another by welding are conical.

Gleiche Einzelheiten sind in Fig. 2 mit denselben Bezugsziffern bezeichnet, wie in Fig. 1, so daß es sich erübrigt, in Verbindung mit Fig. 2 alle diese Einzelheiten noch einmal detailliert zu beschreiben. Ein weiterer Unterschied zwischen der in Fig. 1 und in Fig. 2 gezeichneten Ausbildung besteht darin, daß gemäß Fig. 2 der innen umlaufende Wulst 16 bzw. die beiden den Wulst 16 begrenzenden Stoßflächen 18 eine radiale Abmessung a aufweisen, die größer ist als die Wanddicke d des jeweiligen Verbundrohres 20, wobei die Wanddicke d durch die Summe der Wanddicken der Kunststoff-Innenschicht 22, der Metallzwischenschicht 26 und der Kunststoff-Außenschicht 24 gegeben ist.The same details are designated in FIG. 2 with the same reference numerals as in FIG. 1, so that it is not necessary to describe all of these details again in detail in connection with FIG. 2. Another difference between the design shown in FIG. 1 and in FIG. 2 is that, according to FIG. 2, the inner circumferential bead 16 or the two abutting surfaces 18 delimiting the bead 16 have a radial dimension a which is larger than that Wall thickness d of the respective composite pipe 20 , the wall thickness d being given by the sum of the wall thicknesses of the plastic inner layer 22 , the metal intermediate layer 26 and the plastic outer layer 24 .

Fig. 3 zeigt halbseitig geschnitten eine Verbindungseinrichtung 10 in Kombination mit abschnittweise gezeichneten Kunststoff- Metall-Verbundrohren 20, wobei die Verbindungseinrichtung 10 als Hülsen-Winkelstück 42 ausgebildet ist, das mit zwei voneinander entfernten Einsteckabschnitten 14 ausgebildet ist, die innenseitig durch Stoßflächen 18 begrenzt sind, die ähnlich den in Fig. 2 gezeichneten Stoßflächen 18 konisch, d. h. mit einem Konuswinkel k, gestaltet sind. Entsprechend sind die ringförmigen Stirnflächen 30 der beiden miteinander mittels des Hülsen-Winkelstückes 42 durch Verschweißen zu verbindenden Kunststoff-Metall-Verbundrohre 20 konisch gestaltet. Auch bei der in Fig. 3 gezeichneten Ausbildung der Verbindungseinrichtung 10 ist jeder der beiden hülsenförmigen Einsteckabschnitte 14 des Hülsen-Winkelstückes 42 mit einem elektrischen Widerstandsheizelement 32 versehen, das von einem Widerstandsdraht gebildet ist. Die Widerstandsheizelement 32 ragen mit Anschlußenden 34 aus dem Hülsen-Winkelstück 42 heraus, so daß die Widerstandsheizelemente 32 miteinander in Serie oder parallelgeschaltet werden können. Jedes der beiden Widerstandsheizelemente 32 ist mit einem ersten Abschnitt 36 im Bereich des jeweiligen hülsenförmigen Einsteckabschnittes 14 und mit einem zweiten Abschnitt 38 im Bereich der jeweils zugehörigen Stoßfläche 18 versehen, wobei die beiden Abschnitte 36 und 38 des jeweiligen Widerstandsheizelementes 32 voneinander verschiedene spezifische Heizleistungen aufweisen können. Fig. 3 shows one side cut a connecting means 10 in combination with partially-drawn plastic-metal composite tubes 20, wherein the connection means 10 is designed as a sleeve-elbow 42 is formed with two spaced Einsteckabschnitten 14 which are on the inside limited by abutment surfaces 18 , which are designed conically, ie with a cone angle k, similar to the abutment surfaces 18 shown in FIG. 2. Correspondingly, the annular end faces 30 of the two plastic-metal composite pipes 20 to be connected to one another by means of the sleeve angle piece 42 by welding are conical. In the embodiment of the connecting device 10 shown in FIG. 3, each of the two sleeve-shaped insertion sections 14 of the sleeve angle piece 42 is provided with an electrical resistance heating element 32 , which is formed by a resistance wire. The resistance heating element 32 protrude with connection ends 34 from the sleeve angle piece 42 , so that the resistance heating elements 32 can be connected to one another in series or in parallel. Each of the two resistance heating elements 32 is provided with a first section 36 in the area of the respective sleeve-shaped insertion section 14 and with a second section 38 in the area of the respectively associated abutting surface 18 , wherein the two sections 36 and 38 of the respective resistance heating element 32 can have different specific heating powers .

Gleiche Einzelheiten sind auch in Fig. 3 mit denselben Bezugsziffern bezeichnet wie in den Fig. 1 und 2, so daß es sich erübrigt, in Verbindung mit Fig. 3 alle diese Einzelheiten noch einmal detailliert zu beschreiben.The same details are also designated in FIG. 3 with the same reference numerals as in FIGS . 1 and 2, so that it is not necessary to describe all of these details again in detail in connection with FIG. 3.

Fig. 4 verdeutlicht teilweise aufgeschnitten eine Verbindungseinrichtung 10, die als T-Stück 44 ausgebildet ist. Sie weist drei Einsteckabschnitte 14 auf, die jeweils im Inneren des T-Stückes 44 durch eine zugehörige Stoßfläche 18 begrenzt sind. Bei der in Fig. 4 gezeichneten Ausbildung der Verbindungseinrichtung 10 sind die Stoßflächen 18 wie bei der in Fig. 1 dargestellten Ausführungsform der Verbindungseinrichtung 10 zur zugehörigen Mittelachse 28 des entsprechenden Einsteckabschnittes 14 senkrecht orientiert. Entsprechend sind die ringförmigen Stirnflächen 30 der Kunststoff-Metall-Verbundrohre 20 zu ihren Mittelachsen 28 senkrecht orientiert. Jedes der Verbundrohre 20 weist eine Kunststoff-Innenschicht 22, eine Kunststoff-Außenschicht 24 und eine zwischen der Innen- und der Außenschicht 22, 24 vorgesehene Metallzwischenschicht 26 auf. Jeder der hülsenförmigen Einsteckabschnitte 14 der als T-Stück 44 ausgebildeten Verbindungseinrichtung 10 ist mit einem Widerstandsheizelement 32 versehen, das von einem Widerstandsdraht gebildet ist, der mit Anschlußenden 34 aus dem T-Stück 44 herausragt. Auch bei dieser Ausbildung der Verbindungseinrichtung 10 ist jedes der Widerstandsheizelemente 32 mit einem ersten Abschnitt 36 und mit einem zweiten Abschnitt 38 ausgebildet, die zweckmäßigerweise voneinander verschiedene spezifische Heizleistungen besitzen können. Der erste Abschnitt 36 ist dem jeweiligen hülsenförmigen Einsteckabschnitt 14 und der jeweilige zweite Abschnitt 38 ist der jeweils zugehörigen Stoßfläche 18 zugeordnet. Fig. 4 illustrates partially cut away a connecting device 10 which is designed as a T-piece 44 . It has three insertion sections 14 , each of which is delimited in the interior of the T-piece 44 by an associated abutment surface 18 . In the embodiment of the connecting device 10 shown in FIG. 4, as in the embodiment of the connecting device 10 shown in FIG. 1, the abutting surfaces 18 are oriented perpendicular to the associated central axis 28 of the corresponding plug-in section 14 . Correspondingly, the annular end faces 30 of the plastic-metal composite pipes 20 are oriented perpendicular to their central axes 28 . Each of the composite pipes 20 has a plastic inner layer 22 , a plastic outer layer 24 and a metal intermediate layer 26 provided between the inner and outer layers 22 , 24 . Each of the sleeve-shaped plug-in sections 14 of the connecting device 10 designed as a T-piece 44 is provided with a resistance heating element 32 which is formed by a resistance wire which projects out of the T-piece 44 with connecting ends 34 . In this embodiment of the connecting device 10 , too, each of the resistance heating elements 32 is formed with a first section 36 and with a second section 38 , which can expediently have different specific heating powers. The first section 36 is assigned to the respective sleeve-shaped insertion section 14 and the respective second section 38 is assigned to the respectively associated abutting surface 18 .

Claims (10)

1. Einrichtung zum Verbinden von mindestens zwei Kunststoff- Metall-Verbundrohren (20) durch Verschweißen, wobei die Verbundrohre (20) eine Kunststoff-Außenschicht (24), eine Kunststoff-Innenschicht (22) und zwischen diesen beiden Schichten (22, 24) eine Metallzwischenschicht (26) aufweisen, und wobei die Verbindungseinrichtung (10) mit hülsenförmigen Einsteckabschnitten (14) für die Verbundrohre (20) ausgebildet und mit einem elektrischen Widerstandsheizelement (32) versehen ist, dadurch gekennzeichnet, daß jeder hülsenförmige Einsteckabschnitt (14) durch eine im Inneren der Verbindungseinrichtung (10) umlaufende Stoßfläche (18) begrenzt ist und das Widerstandsheizelement (32) mit einem ersten Abschnitt (36) im Bereich des jeweiligen hülsenförmigen Einsteckabschnittes (14) und mit einem zweiten Abschnitt (38) im Bereich der jeweils zugehörigen Stoßfläche (18) vorgesehen ist. 1. Device for connecting at least two plastic-metal composite pipes ( 20 ) by welding, the composite pipes ( 20 ) having a plastic outer layer ( 24 ), a plastic inner layer ( 22 ) and between these two layers ( 22 , 24 ) have a metal intermediate layer ( 26 ), and wherein the connecting device ( 10 ) is formed with sleeve-shaped insertion sections ( 14 ) for the composite pipes ( 20 ) and is provided with an electrical resistance heating element ( 32 ), characterized in that each sleeve-shaped insertion section ( 14 ) is provided with a in the interior of the connecting device ( 10 ) is limited to the peripheral abutment surface ( 18 ) and the resistance heating element ( 32 ) with a first section ( 36 ) in the area of the respective sleeve-shaped insertion section ( 14 ) and with a second section ( 38 ) in the area of the associated abutment area ( 18 ) is provided. 2. Verbindungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die jeweilige Stoßfläche (18) zur Mittelachse (28) des zugehörigen hülsenförmigen Einsteckabschnittes (14) senkrecht orientiert ist.2. Connecting device according to claim 1, characterized in that the respective abutment surface ( 18 ) to the central axis ( 28 ) of the associated sleeve-shaped insertion section ( 14 ) is oriented perpendicularly. 3. Verbindungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die jeweilige Stoßfläche (18) mit der Mittelachse (28) des zugehörigen hülsenförmigen Einsteckabschnittes (14) einen Konuswinkel (k) einschließt.3. Connecting device according to claim 1, characterized in that the respective abutment surface ( 18 ) with the central axis ( 28 ) of the associated sleeve-shaped insertion section ( 14 ) includes a cone angle (k). 4. Verbindungseinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die jeweilige Stoßfläche (18) eine radiale Abmessung (a) aufweist, die größer ist als die Summe aus der Wanddicke (d) der Kunststoff-Außenschicht (24) und der Wanddicke (c) der Metallzwischenschicht (26) des zugehörigen Verbundrohres (20).4. Connecting device according to one of claims 1 to 3, characterized in that the respective abutment surface ( 18 ) has a radial dimension (a) which is greater than the sum of the wall thickness (d) of the plastic outer layer ( 24 ) and the Wall thickness (c) of the metal intermediate layer ( 26 ) of the associated composite pipe ( 20 ). 5. Verbindungseinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die jeweilige Stoßfläche (18) eine radiale Abmessung (a) aufweist, die größer ist als die Wanddicke (d) des zugehörigen Verbundrohres (20).5. Connecting device according to claim 4, characterized in that the respective abutment surface ( 18 ) has a radial dimension (a) which is greater than the wall thickness (d) of the associated composite pipe ( 20 ). 6. Verbindungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Widerstands-Heizelement (32) derartig ausgebildet ist, daß seine spezifische Heizleistung im ersten Abschnitt (36) von der spezifischen Heizleistung im zweiten Abschnitt (38) verschieden ist. 6. Connecting device according to claim 1, characterized in that the resistance heating element ( 32 ) is designed such that its specific heating power in the first section ( 36 ) is different from the specific heating power in the second section ( 38 ). 7. Verbindungseinrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Widerstandsheizelement (32) aus dem gleichen Material besteht wie die Metallzwischenschicht (26) des jeweiligen Verbundrohres (20).7. Connecting device according to one of claims 1 to 6, characterized in that the resistance heating element ( 32 ) consists of the same material as the metal intermediate layer ( 26 ) of the respective composite pipe ( 20 ). 8. Verbindungseinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sie als gerade Hülse (12) mit zwei voneinander abgewandten Einsteckabschnitten (14) ausgebildet ist, wobei die zugehörigen Stoßflächen (18) an einem im Inneren der Verbindungseinrichtung (10) umlaufenden Wulst (16) ausgebildet sind.8. Connecting device according to one of claims 1 to 7, characterized in that it is designed as a straight sleeve ( 12 ) with two mutually facing insertion sections ( 14 ), the associated abutting surfaces ( 18 ) on one inside the connecting device ( 10 ) rotating Bead ( 16 ) are formed. 9. Verbindungseinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sie als Hülsen-Winkelstück (42) mit mindestens zwei Einsteckabschnitten (14) ausgebildet ist, die miteinander jeweils einen bestimmten Winkel einschließen.9. Connecting device according to one of claims 1 to 7, characterized in that it is designed as a sleeve angle piece ( 42 ) with at least two insertion sections ( 14 ) which each enclose a certain angle. 10, Verbindungseinrichtung nach Anspruch 9, dadurch gekennzeichnet, daß sie als T-Stück (44) ausgebildet ist.10, connecting device according to claim 9, characterized in that it is designed as a T-piece ( 44 ).
DE19944444097 1994-12-10 1994-12-10 Device for connecting at least two plastic-metal composite pipes by welding Expired - Fee Related DE4444097C2 (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013996A1 (en) * 1995-10-12 1997-04-17 Heinrich Hillinger Sleeve for joining pipes
WO1997049540A1 (en) * 1996-06-25 1997-12-31 Uponor B.V. Electrofusion fitting
WO1998022744A1 (en) * 1996-11-20 1998-05-28 Uponor B.V. Pipe connector
WO2000011393A1 (en) * 1998-08-19 2000-03-02 Friatec Aktiengesellschaft Plumbing fixture comprising a welding coil
DE19961047A1 (en) * 1999-12-16 2001-07-05 Andre Anschuetz Joining a multi-layer composite pipe to a connecting piece by use of a welding temperature related to the melting point of plastic layers in the pipe
DE10047475A1 (en) * 2000-09-21 2002-04-11 Georg Fischer Wavin Ag Subinge Welding parts made of plastic
FR2871983A1 (en) * 2004-06-22 2005-12-23 Univ Bretagne Sud Etablissemen Liquid or gaseous fluid heating conduit, has central layer held between electrically insulating inner and outer layers made of electrically conducting polymer composite material, where fluid is circulated inside and outside conduit
FR2879121A1 (en) * 2004-12-15 2006-06-16 Inergy Automotive Systems Res METHOD FOR THE CONNECTION OF A TUBULAR PIECE OF PLASTIC MATERIAL TO A CHUTE OF A FUEL TANK ALSO IN PLASTIC MATERIAL
EP1752699A2 (en) 2005-08-13 2007-02-14 Becker Plastics GmbH Line-coupling between a fitting and a composite pipe as well as a method of production of a line-coupling
WO2009033603A1 (en) * 2007-09-07 2009-03-19 Egeplast Werner Strumann Gmbh & Co. Kg Method for welding plastic pipes together
WO2011028148A2 (en) * 2009-09-04 2011-03-10 Общество С Ограниченной Ответственность "Aльtepплact", Fitting with weld shoulder depth indicator for polypropylene pipes
EP2363269A1 (en) * 2010-03-02 2011-09-07 Gunar Kloss Coupling made of thermoplastic
US8398908B2 (en) 2004-12-23 2013-03-19 Radius Systems Limited Plastics pipe
CN109000068A (en) * 2018-09-25 2018-12-14 上海伟星新型建材有限公司 A kind of fitting structure fuse of modified hot melt interconnection technique
DE102021105061A1 (en) 2021-03-03 2022-09-08 Gerodur Mpm Kunststoffverarbeitung Gmbh & Co. Kg Pipe, pipe system, method of making a pipe and method of forming a pipe system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19814708C1 (en) * 1998-04-01 1999-05-20 Friatec Ag Straight connection for composite plastic metal plastic pipe
DE10345034B4 (en) * 2003-09-27 2006-06-14 Rehau Ag + Co. Connecting piece for a fluid-tight connection between at least two pipe elements and pipe connecting device with such a connection piece

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1738435U (en) * 1956-11-26 1957-01-24 Dinamit Actiengesellschaft Vor WELDED SOCKET FOR PLASTIC PIPES.
EP0390748A2 (en) * 1989-03-31 1990-10-03 Geberit AG Welding socket
DE9210769U1 (en) * 1992-08-12 1992-10-08 Unicor Suhler Maschinenfabrik GmbH, O-6000 Suhl Multilayer composite pipe
EP0604907A1 (en) * 1992-12-28 1994-07-06 Uponor B.V. A method of forming a multilayer plastic pipe and a multilayer plastic pipe for conducting fluids

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1738435U (en) * 1956-11-26 1957-01-24 Dinamit Actiengesellschaft Vor WELDED SOCKET FOR PLASTIC PIPES.
EP0390748A2 (en) * 1989-03-31 1990-10-03 Geberit AG Welding socket
DE9210769U1 (en) * 1992-08-12 1992-10-08 Unicor Suhler Maschinenfabrik GmbH, O-6000 Suhl Multilayer composite pipe
EP0604907A1 (en) * 1992-12-28 1994-07-06 Uponor B.V. A method of forming a multilayer plastic pipe and a multilayer plastic pipe for conducting fluids

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP 05-87286 (A) in Pat. Abstr. of Japan, Vol. 17, No. 423, 06.08.1993, M-1458 *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013996A1 (en) * 1995-10-12 1997-04-17 Heinrich Hillinger Sleeve for joining pipes
WO1997049540A1 (en) * 1996-06-25 1997-12-31 Uponor B.V. Electrofusion fitting
WO1998022744A1 (en) * 1996-11-20 1998-05-28 Uponor B.V. Pipe connector
AU729848B2 (en) * 1996-11-20 2001-02-08 Uponor Innovation Ab Pipe joint and method
US6375226B1 (en) 1996-11-20 2002-04-23 Uponor Innovation Ab Pipe connector having mechanical and fusion connections
WO2000011393A1 (en) * 1998-08-19 2000-03-02 Friatec Aktiengesellschaft Plumbing fixture comprising a welding coil
DE19961047A1 (en) * 1999-12-16 2001-07-05 Andre Anschuetz Joining a multi-layer composite pipe to a connecting piece by use of a welding temperature related to the melting point of plastic layers in the pipe
DE19961047C2 (en) * 1999-12-16 2002-06-13 Andre Anschuetz Method for connecting a multi-layer composite pipe and connection point and component for heating the material layers of a multi-layer composite pipe
DE10047475A1 (en) * 2000-09-21 2002-04-11 Georg Fischer Wavin Ag Subinge Welding parts made of plastic
FR2871983A1 (en) * 2004-06-22 2005-12-23 Univ Bretagne Sud Etablissemen Liquid or gaseous fluid heating conduit, has central layer held between electrically insulating inner and outer layers made of electrically conducting polymer composite material, where fluid is circulated inside and outside conduit
FR2879121A1 (en) * 2004-12-15 2006-06-16 Inergy Automotive Systems Res METHOD FOR THE CONNECTION OF A TUBULAR PIECE OF PLASTIC MATERIAL TO A CHUTE OF A FUEL TANK ALSO IN PLASTIC MATERIAL
WO2006064005A1 (en) * 2004-12-15 2006-06-22 Inergy Automotive Systems Research (Societe Anonyme) Method for connecting a tubular part made of plastic to a neck of a fuel tank also made of plastic
US8398908B2 (en) 2004-12-23 2013-03-19 Radius Systems Limited Plastics pipe
EP1752699A2 (en) 2005-08-13 2007-02-14 Becker Plastics GmbH Line-coupling between a fitting and a composite pipe as well as a method of production of a line-coupling
WO2009033603A1 (en) * 2007-09-07 2009-03-19 Egeplast Werner Strumann Gmbh & Co. Kg Method for welding plastic pipes together
WO2011028148A2 (en) * 2009-09-04 2011-03-10 Общество С Ограниченной Ответственность "Aльtepплact", Fitting with weld shoulder depth indicator for polypropylene pipes
WO2011028148A3 (en) * 2009-09-04 2011-04-28 Общество С Ограниченной Ответственность "Aльtepплact", Fitting with weld shoulder depth indicator for polypropylene pipes
EP2363269A1 (en) * 2010-03-02 2011-09-07 Gunar Kloss Coupling made of thermoplastic
CN109000068A (en) * 2018-09-25 2018-12-14 上海伟星新型建材有限公司 A kind of fitting structure fuse of modified hot melt interconnection technique
DE102021105061A1 (en) 2021-03-03 2022-09-08 Gerodur Mpm Kunststoffverarbeitung Gmbh & Co. Kg Pipe, pipe system, method of making a pipe and method of forming a pipe system

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