DE102016104842A1 - Welding ring for connecting plastic pipes - Google Patents

Welding ring for connecting plastic pipes Download PDF

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Publication number
DE102016104842A1
DE102016104842A1 DE102016104842.9A DE102016104842A DE102016104842A1 DE 102016104842 A1 DE102016104842 A1 DE 102016104842A1 DE 102016104842 A DE102016104842 A DE 102016104842A DE 102016104842 A1 DE102016104842 A1 DE 102016104842A1
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DE
Germany
Prior art keywords
welding ring
welding
hose
cavity
ring body
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
DE102016104842.9A
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German (de)
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DE102016104842B4 (en
Inventor
Timo Saarinen
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.)
Bellapipe Oy
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Bellapipe Oy
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Publication date
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Priority to DE102016104842.9A priority Critical patent/DE102016104842B4/en
Publication of DE102016104842A1 publication Critical patent/DE102016104842A1/en
Application granted granted Critical
Publication of DE102016104842B4 publication Critical patent/DE102016104842B4/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—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
    • B29C65/3424—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 said at least a single wire having the form of a coil spring
    • 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
    • B29C65/3464—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 characterised by the cross-section of said heated elements which remain in the joint or by the cross-section of their coating, e.g. being triangular
    • 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
    • B29C65/348—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 with a polymer coating
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5021—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5064—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped
    • B29C65/5071—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped and being composed by one single element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—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
    • B29C66/70—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
    • B29C66/739—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 material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8262—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using "pressure means" which are associated with at least one of the parts to be joined and remain in or on it
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8264—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using the thermal expansion 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8266—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52296—Joining tubular articles involving the use of a socket said socket comprising sealing elements, e.g. gaskets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/55—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 sealing elements being incorporated into the joints, e.g. gaskets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/828—Other pressure application arrangements
    • B29C66/8284—Other pressure application arrangements using the thermal expansion of the joining tool
    • 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

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

Abstract

Die Erfindung betrifft einen Schweißring zum Verbinden von Kunststoffrohren, wobei der Schweißring einen Schweißringkörper aufweist, der einen inneren, mit einem Hohlraum versehenen Dehnschlauch umfasst, um den ein mit einem Schweißautomat verbundener Widerstandsheizdraht geführt ist, welcher von einer Kunststoffumhüllung umgeben ist, die nach einem Aufschmelzen eine vollständige, stoffschlüssige Verbindung von ineinander greifenden Kunststoffrohren herbeiführt. Diese Schweißringe bieten zwar eine hohe Sicherheit beim mediendichten Verschweißen von Kunststoffrohren, jedoch kommt es in Ausnahmefällen vor, dass die Verschweißung nicht vollständig gewährleistet ist. Die Aufgabe der Erfindung besteht deshalb darin, möglichst alle Faktoren auszuschalten, die in Ausnahmefällen der mediendichten Verschweißung entgegenwirken. Die Lösung der Aufgabe ergibt sich dadurch, dass der Schweißring mindestens einen Luftdurchlass aufweist, der von einer Außenseite des Schweißringkörpers zum Hohlraum des Dehnschlauches führt.The invention relates to a welding ring for connecting plastic pipes, wherein the welding ring has a welding ring body, which comprises an inner, provided with a cavity expansion hose around which a connected to a welding resistance heating wire is surrounded by a plastic casing, which after melting a complete, cohesive connection of interlocking plastic pipes brought about. Although these welding rings provide a high degree of safety in the media-tight welding of plastic pipes, it happens in exceptional cases that the welding is not completely guaranteed. The object of the invention is therefore to eliminate as many factors as possible, which counteract the media-tight welding in exceptional cases. The solution to the problem results from the fact that the welding ring has at least one air passage, which leads from an outer side of the welding ring body to the cavity of the expansion tube.

Description

Die Erfindung betrifft einen Schweißring zum Verbinden von Kunststoffrohren, wobei der Schweißring einen Schweißringkörper aufweist, der einen inneren, mit einem Hohlraum versehenen Dehnschlauch umfasst, um den ein mit einem Schweißautomaten verbundener Widerstandsheizdraht geführt ist, welcher von einer Kunststoffumhüllung umgeben ist, die nach einem Aufschmelzen eine vollständige, stoffschlüssige Verbindung von ineinander greifenden Kunststoffrohren herbeiführt. The invention relates to a welding ring for connecting plastic pipes, wherein the welding ring has a welding ring body comprising an inner, provided with a cavity expansion hose around which a connected to a welding resistance heating wire is surrounded by a plastic sheath, which after melting a complete, cohesive connection of interlocking plastic pipes brought about.

Kunststoffrohre werden häufig – wie beispielsweise in der DE 10 2013 018 434 7 der Anmelderin offenbart – mittels in Kupplungsbereichen eingelegter, grundsätzlich vorteilhafter Schweißringe verbunden. Plastic pipes are common - such as in the DE 10 2013 018 434 7 the applicant discloses - connected by means inserted in coupling areas, basically advantageous welding rings.

Die Schweißringe weisen Widerstandsheizdrähte auf, welche um einen innenliegenden Dehnschlauch herum geführt sind. Dehnschlauch und Widerstandsheizdraht sind von einer schmelzbaren Kunststoffumhüllung eingeschlossen, deren Material zumeist dem Material der zu verbindenden Kunststoffrohre entspricht. The welding rings have resistance heating wires, which are guided around an inner expansion hose. Expansion hose and resistance heating wire are enclosed by a fusible plastic sheath whose material usually corresponds to the material of the plastic pipes to be connected.

Der Dehnschlauch besteht aus einem Werkstoff mit Memory-Effekt. Durch den Memory-Effekt besitzt der Werkstoff ein Formgedächtnis und kann sich z. B. an eine frühere Form „erinnern“ und bei einer Temperaturänderung seine Form dementsprechend ändern. Der für den Dehnschlauch verwendete Werkstoff kann beispielsweise durch Hitzeeinwirkung in einem gewissen Maße dauerhaft sein Volumen vergrößern.The expansion tube is made of a material with a memory effect. Due to the memory effect of the material has a shape memory and can be z. B. "remember" an earlier form and change its shape accordingly with a change in temperature. The material used for the expansion tube can increase its volume to some extent, for example, by heat to some extent.

Wird eine Spannung an die Widerstandsheizdrähte angelegt, so schmilzt daher zum einen die Kunststoffumhüllung auf, während zum anderen der Dehnschlauch sein Volumen vergrößert. Durch das Aufschmelzen und die Volumenvergrößerung des Schweißrings ergibt sich letztendlich eine mediendichte Verschweißung der Rohre im Kupplungsbereich. When a voltage is applied to the resistance heating wires, the plastic covering therefore melts on the one hand, while the expansion hose, on the other hand, increases its volume. The melting and the increase in volume of the welding ring ultimately results in media-tight welding of the pipes in the coupling area.

Diese Schweißringe bieten zwar eine hohe Sicherheit beim mediendichten Verschweißen von Kunststoffrohren, jedoch kommt es in seltenen Ausnahmefällen vor, dass die Verschweißung nicht vollständig gewährleistet ist.Although these welding rings offer a high degree of safety in the media-tight welding of plastic pipes, in rare exceptional cases, however, the welding is not completely guaranteed.

Die Aufgabe der Erfindung besteht deshalb darin, möglichst alle Faktoren auszuschalten, die in diesen Ausnahmefällen der mediendichten Verschweißung entgegenwirken. The object of the invention is therefore to eliminate as many factors as possible, which counteract the media-tight welding in these exceptional cases.

Die Lösung der Aufgabe ergibt sich aus den nachfolgenden Merkmalen des Anspruchs 1:
Schweißring zum Verbinden von Kunststoffrohren, wobei der Schweißring einen Schweißringkörper aufweist, der einen inneren mit einem Hohlraum versehenen Dehnschlauch umfasst, um den Dehnschlauch ein mit einem Schweißautomat verbundener Widerstandsheizdraht geführt ist, welcher von einer Kunststoffumhüllung umgeben ist, die nach einem Aufschmelzen eine vollständige stoffschlüssige Verbindung von ineinander greifenden Kunststoffrohren herbeiführt, dadurch gekennzeichnet, dass der Schweißring mindestens einen Luftdurchlass aufweist, der von einer Außenseite des Schweißringkörpers zum Hohlraum des Dehnschlauches führt. The solution of the problem results from the following features of claim 1:
A welding ring for connecting plastic pipes, wherein the welding ring comprises a welding ring body, which comprises an inner hollowed expansion hose to which the expansion hose is guided a resistance heating wire connected to a welding machine, which is surrounded by a plastic sheath, which after melting a complete cohesive connection of interlocking plastic pipes brought about, characterized in that the welding ring has at least one air passage, which leads from an outer side of the welding ring body to the cavity of the expansion hose.

Wie bereits beschrieben, kommt es beim Aufschmelzen durch den Memory-Effekt zu einer Volumenvergrößerung des Dehnschlauchs, wodurch es in seinem Hohlraum zu einem Unterdruck kommen kann. Dieser Unterdruck führt in sehr seltenen Fällen dazu, dass der Dehnschlauch nicht in einem für die Verbindung der Kunststoffrohre ausreichendem Maße sein Volumen vergrößern kann. Um diesem entgegenzuwirken, weist der erfindungsgemäße Schweißring auf vorteilhafte Weise zumindest einen Luftdurchlass von der Außenseite des Schweißringkörpers zum Hohlraum des Dehnschlauchs auf. Mittels diesem Luftdurchlass ist ein automatischer Druckausgleich zwischen Hohlraum und Außenseite möglich.As already described, the memory effect leads to an increase in volume of the expansion tube during melting, which can lead to a negative pressure in its cavity. This negative pressure leads in very rare cases to the fact that the expansion hose can not increase its volume to a sufficient extent for the connection of the plastic pipes. To counteract this, the welding ring according to the invention advantageously has at least one air passage from the outside of the welding ring body to the cavity of the expansion hose. By means of this air passage, an automatic pressure equalization between the cavity and the outside is possible.

Ein derartiger erfindungsgemäßer Schweißring bietet daher den Vorteil, dass der Dehnschlauch noch zuverlässiger beim Aufschmelzen sein Volumen vergrößert. Such a welding ring according to the invention therefore offers the advantage that the expansion hose increases its volume even more reliably during melting.

Der im Schweißringkörper sitzende Dehnschlauch ist bevorzugt aus einem thermisch stabilen Material gebildet, beispielsweise einem Kunststoff wie vernetztes Polyethylen (PEX) oder ggf. auch einem Bimetall. The expansion hose seated in the welding ring body is preferably formed from a thermally stable material, for example a plastic such as crosslinked polyethylene (PEX) or optionally also a bimetal.

Die Kunststoffumhüllung, die meist aus Polyethylen (PE), Polypropylen (PP) oder Polyvinylchlorid (PVC) besteht, umschließt den vom Widerstandsheizdraht umgebenen Dehnschlauch und führt beim Aufschmelzen zu einer vollständigen stoffschlüssigen Verbindung der materialgleichen, zu verbindenden Kunststoffrohre. The plastic casing, which usually consists of polyethylene (PE), polypropylene (PP) or polyvinyl chloride (PVC), surrounds the expansion hose surrounded by the resistance heating wire and, during melting, leads to a complete cohesive connection of the material-like plastic pipes to be connected.

In einer sehr einfachen Ausführungsform ist der Luftdurchlass lediglich als kanalartige Bohrung durch den Schweißringkörper bis zum Hohlraum ausgebildet. Beim Aufschmelzen des Schweißrings kann es bei dieser Ausführungsform allerdings dazu kommen, dass die schmelzende Kunststoffumhüllung einen so gestalteten Luftdurchlass schnell verschließt, sodass der Druckausgleich nicht gewährleistet ist. In a very simple embodiment, the air passage is formed only as a channel-like bore through the welding ring body to the cavity. During the melting of the welding ring, however, in this embodiment, it may happen that the melting plastic sheath quickly closes a thus configured air passage, so that the pressure compensation is not guaranteed.

Einen zuverlässigeren Schutz vor einem Verschluss des Luftdurchlasses beim Aufschmelzen des Schweißringes bietet jedoch eine Ausführungsform, bei der der Luftdurchlass aus einer Hülse aus einem thermisch stabilen Material gebildet ist, welche sich zwischen Außenseite des Schweißrings und dem Hohlraum erstreckt. A more reliable protection against a closure of the air passage when melting the However, welding ring provides an embodiment in which the air passage is formed of a sleeve of a thermally stable material which extends between the outside of the welding ring and the cavity.

In einer weiteren besonders bevorzugten Ausführungsform ist der Luftdurchlass aus einem Schlauch aus einem thermisch stabilen Material gebildet. Hierbei erstreckt sich der Schlauch vom Hohlraum des Dehnschlauchs durch den Schweißringkörper nach außen, bevorzugt außerhalb eines Bereiches der ineinander greifenden Kunststoffrohre. Dadurch, dass der Luftdurchlass außerhalb dieses Bereiches liegt, kann eine einfache und zuverlässige Luftzuführung zum Hohlraum zum Zwecke des Druckausgleichs bewerkstelligt werden, ohne Gefahr eines Verstopfens, z. B. durch überschüssiges schmelzendes Material.In a further particularly preferred embodiment, the air passage is formed of a tube made of a thermally stable material. In this case, the hose extends from the cavity of the expansion hose through the welding ring body to the outside, preferably outside of a region of the interlocking plastic pipes. The fact that the air passage is outside this range, a simple and reliable air supply to the cavity for the purpose of pressure equalization can be accomplished without the risk of clogging, z. B. by excess melting material.

In einer bevorzugten Ausführungsform ist dieser Schlauch zumindest teilweise zusammen mit einem zum Widerstandsheizdraht führenden Kontaktdraht in einem gemeinsamen Mantel angeordnet. Dies erleichtert die Handhabung des Schlauchs und stellt sicher, dass dieser aus dem Bereich der ineinander greifenden Kunststoffrohre herausgeführt wird. In a preferred embodiment, this tube is at least partially arranged together with a contact wire leading to the resistance heating wire in a common jacket. This facilitates the handling of the hose and ensures that this is led out of the region of the interlocking plastic pipes.

In vorteilhaften Ausführungsformen ist das thermisch stabile Material der Hülse oder des Schlauches Teflon, es können aber auch andere wärmestabile Materialien wie beispielsweise PEX oder im Falle der Hülse auch Metalle, bevorzugt sein. Hierdurch ist es auf einfache und kostengünstige Weise möglich, einen Luftdurchlass bereitzustellen, der auch noch beim Aufschmelzen geöffnet bleibt. In advantageous embodiments, the thermally stable material of the sleeve or tube is Teflon, but other heat-stable materials such as PEX or, in the case of the sleeve, metals may also be preferred. This makes it possible in a simple and cost-effective manner to provide an air passage, which remains open even when melting.

Auf vorteilhafte Weise kann der Schweißring eine Mehrzahl von Luftdurchlässen aufweisen. Durch diese redundante Ausführung wird mit großer Wahrscheinlichkeit vermieden, dass alle Luftdurchlässe gleichzeitig beim Schweißvorgang verstopft oder beim Zusammenbau der Rohre abgeklemmt werden und damit kein Druckausgleich zwischen Hohlraum im Schweißring und der Umgebung stattfindet.Advantageously, the welding ring may have a plurality of air passages. This redundant design is highly likely to avoid that all air outlets are clogged simultaneously during the welding process or disconnected during assembly of the pipes and thus no pressure equalization between cavity in the welding ring and the environment takes place.

Weitere Vorteile der Erfindung ergeben sich aus den nachfolgenden Beschreibungen von Ausführungsbeispielen. Es zeigen:Further advantages of the invention will become apparent from the following descriptions of exemplary embodiments. Show it:

1 eine skizzenhafte Darstellung eines Schweißrings mit Hülsen als Luftdurchlass; 1 a sketchy representation of a welding ring with sleeves as an air passage;

2a einen Längsschnitt gemäß Schnittlinie IIa-IIa in 2b durch einen Schweißringkörper mit einer Hülse als Luftdurchlass; 2a a longitudinal section along section line IIa-IIa in 2 B by a welding ring body with a sleeve as an air passage;

2b einen Querschnitt gemäß Schnittlinie IIb-IIB in 1 durch einen Schweißringkörper mit einer Hülse als Luftdurchlass; 2 B a cross section along section line IIb-IIB in 1 by a welding ring body with a sleeve as an air passage;

3 eine skizzenhafte Darstellung eines Schweißrings mit einem Schlauch als Luftdurchlass; 3 a sketchy representation of a welding ring with a hose as the air passage;

4a einen Längsschnitt gemäß Schnittlinie IVa-IVa in 4b durch einen Schweißringkörper mit einem Schlauch als Luftdurchlass; 4a a longitudinal section along section line IVa-IVa in 4b through a welding ring body with a hose as an air passage;

4b einen Querschnitt gemäß Schnittlinie IVb-IVb in 2 durch einen Schweißringkörper mit einem Schlauch als Luftdurchlass und 4b a cross section along section line IVb-IVb in 2 through a welding ring body with a hose as the air passage and

5 einen Längsschnitt durch einen Schweißring mit einem Schlauch als Luftdurchlass im eingebauten Zustand. 5 a longitudinal section through a welding ring with a hose as an air passage in the installed state.

In 1 ist skizzenhaft ein im Folgenden mit dem Bezugszeichen 10 gekennzeichneter Schweißring dargestellt. In 1 is sketchy one below with the reference numeral 10 marked welding ring shown.

Der Schweißring 10 weist einen Schweißringkörper 11 mit Luftdurchlässen 17 auf, der über ein stabförmiges Führungselement 18 zu einem Ring zusammengefügt ist. Im Bereich dieser Steckverbindung ist der Schweißringkörper 11 zusätzlich von einem Verbindungsmantel 19 aus Kunststoff umgeben, welcher für die Stabilität des Schweißringkörpers 11 in diesem Bereich sorgt. Im Schweißringkörper 11 ist ein Widerstandsheizdraht 15 angeordnet, welcher über Kontaktdrähte K mit einem Schweißautomat verbunden ist.The welding ring 10 has a welding ring body 11 with air outlets 17 on, the over a rod-shaped guide element 18 assembled into a ring. In the area of this connector is the welding ring body 11 additionally from a connecting jacket 19 surrounded by plastic, which for the stability of the welding ring body 11 ensures in this area. In the welding ring body 11 is a resistance heating wire 15 arranged, which is connected via contact wires K with a welding machine.

In 2a und 2b ist der Schweißringkörper 11 im Detail gezeigt. Im Schweißringkörper 11 ist ein Dehnschlauch 13 angeordnet, um den spiralförmig der Widerstandsheizdraht 15 geführt ist. In seinem Inneren weist der Dehnschlauch 13 einen Hohlraum 12 auf, nach außen ist er durch eine Kunststoffumhüllung 14 ummantelt. Im Luftdurchlass 17 des Schweißringkörpers 11 ist eine Hülse 17a aus Teflon angeordnet. Die Hülse 17a erstreckt sich vom Hohlraum 12 über den Dehnschlauch 13 und die Kunststoffumhüllung 14 bis zu einer Außenseite des Schweißrings 11. In 2a and 2 B is the welding ring body 11 shown in detail. In the welding ring body 11 is a stretch hose 13 arranged around the spiral of the resistance heating wire 15 is guided. Inside, the expansion tube points 13 a cavity 12 out, he is through a plastic cladding 14 jacketed. In the air outlet 17 of the welding ring body 11 is a sleeve 17a made of Teflon. The sleeve 17a extends from the cavity 12 over the expansion tube 13 and the plastic wrap 14 up to an outside of the welding ring 11 ,

In 3 ist zusätzlich ein Schweißring 10 mit einem Schlauch 17b aus Teflon als Luftdurchlass 17 gezeigt. In 3 is additionally a welding ring 10 with a hose 17b made of teflon as air outlet 17 shown.

In den 4a, 4b sind jeweils Schnittdarstellungen durch den Schweißringkörper 11 mit einem Schlauch 17b als Luftdurchlass 17 gezeigt. In der 4 ist ein Längsschnitt gemäß der Schnittlinie IVa-IVa der 4b und in 4b ein Querschnitt gemäß der Schnittlinie IVb-IVb der 3 dargestellt. Der Schlauch 17b verbindet den Hohlraum 12 über den Dehnschlauch 13 und die Kunststoffumhüllung 14 mit der Außenfläche des Schweißringkörpers 11, wobei der außerhalb des Schweißringkörpers 11 angeordnete Schlauch 17b eine so große Länge aufweist, dass er beim Verbinden aus einer Rohrmuffe 22 (s. 5) herausgeführt werden kann. In the 4a . 4b are each sectional views through the welding ring body 11 with a hose 17b as an air passage 17 shown. In the 4 is a longitudinal section along the section line IVa-IVa of 4b and in 4b a cross section according to the section line IVb-IVb of 3 shown. The hose 17b connects the cavity 12 over the expansion tube 13 and the plastic wrap 14 with the outer surface of the welding ring body 11 , wherein the outside of the welding ring body 11 arranged hose 17b has such a long length that when connecting it from a pipe sleeve 22 (S. 5 ) can be led out.

In der schematischen Darstellung der 5 ist ein Längsschnitt durch einen Randbereich zweier ineinander greifender Kunststoffrohre 20a, b gezeigt. Der Schweißring 10 dient hier der Verbindung der beiden Kunststoffrohre 20a, 20b und ist in eine Nut 21 einer Rohrmuffe 22 des ersten Kunststoffrohres 20a eingelegt. Sowohl der Schlauch 17b, als auch die vom Schweißautomat 16 zum Widerstandsheizdraht 15 führenden Kontaktdrähte K werden durch einen Ringraum 23 zwischen dem Kunststoffrohr 20b und der Rohrmuffe 22 geführt. Hierdurch wird deutlich, dass ein als Schlauch 17b ausgebildeter Luftdurchlass 17 eine einfache Möglichkeit zur Verbindung des Hohlraums 12 mit der Umgebung bietet.In the schematic representation of 5 is a longitudinal section through an edge region of two interlocking plastic pipes 20a , b shown. The welding ring 10 serves here the connection of the two plastic pipes 20a . 20b and is in a groove 21 a pipe sleeve 22 of the first plastic pipe 20a inserted. Both the hose 17b , as well as the welding machine 16 to the resistance heating wire 15 leading contact wires K are through an annulus 23 between the plastic pipe 20b and the pipe sleeve 22 guided. This makes it clear that a hose as 17b trained air passage 17 a simple way to connect the cavity 12 offers with the environment.

Bei Anlegung einer Spannung durch den Schweißautomat 16 erwärmt sich der Widerstandsheizdraht 15, wodurch das Material der Kunststoffumhüllung 14 zu schmelzen beginnt. Gleichzeitig vergrößert aufgrund seines Memory-Effektes der aus PEX bestehende Dehnschlauch 13 durch diese Wärmeentwicklung sein Volumen. When applying a voltage through the welding machine 16 the resistance heating wire heats up 15 , whereby the material of the plastic coating 14 begins to melt. At the same time, due to its memory effect, the expansion hose made of PEX increases 13 its volume is due to this heat development.

Durch die Volumenvergrößerung des Dehnschlauchs 13 presst sich der Schweißringkörper 11 gegen eine die Nut 21 begrenzende Rohrwand 24 sowie gegen eine Außenumfangsfläche 25 des Kunststoffrohrs 20b. Die angeschmolzene Kunststoffumhüllung 17 verbindet sich zugleich mit den beiden materialgleichen Kunststoffrohren 20a, b. Hierdurch ergibt sich eine mediendichte, vollständig stoffschlüssige Verbindung der ineinander greifenden Kunststoffrohre 20a, b.Due to the increase in volume of the expansion tube 13 the welding ring body presses itself 11 against a the groove 21 delimiting pipe wall 24 and against an outer peripheral surface 25 of the plastic pipe 20b , The melted plastic casing 17 connects at the same time with the two plastic pipes of the same material 20a , b. This results in a media-tight, completely cohesive connection of the interlocking plastic pipes 20a , b.

Ohne den Schlauch 17b zum Hohlraum 12 würde sich in diesem ein Unterdruck aufbauen, welcher der Volumenvergrößerung des Dehnschlauches 13 entgegenwirkt. Dadurch dass der Schlauch 17b aus dem Bereich des Schweißringkörpers 11 nach außen geführt wird, ist sichergestellt, dass das geschmolzene Material der Kunststoffumhüllung 14 den Luftdurchlass 17 nicht verschließt. So ist während eines solchen Schweißprozesses ein Druckausgleich zwischen dem Hohlraum 12 und der Umgebung gegeben.Without the hose 17b to the cavity 12 would build up in this a negative pressure, which is the increase in volume of the expansion tube 13 counteracts. Because of the hose 17b from the area of the welding ring body 11 is guided to the outside, it is ensured that the molten material of the plastic wrap 14 the air passage 17 does not close. Thus, during such a welding process, a pressure equalization between the cavity 12 and the environment.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Schweißring weld ring
1111
Schweißringkörper Weld ring body
1212
Hohlraum cavity
1313
Dehnschlauch Stretch Hood
1414
Kunststoffumhüllung Plastic covering
1515
Widerstandsheizdraht resistance heating
1616
Schweißautomat welding machine
1717
Luftdurchlass Air passage
17a17a
Hülse shell
17b17b
Schlauch tube
1818
Führungselement guide element
1919
Manschette  cuff
20a20a
Kunststoffrohr Plastic pipe
20b20b
Kunststoffrohr Plastic pipe
2121
Nut groove
2222
Rohrmuffe pipe socket
2323
Ringraum annulus
2424
Rohrwand pipe wall
2525
Außenumfangsfläche des Rohrs 20b Outer peripheral surface of the tube 20b
KK
Kontaktdrähte contact wires

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

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

Zitierte PatentliteraturCited patent literature

  • DE 1020130184347 [0002] DE 1020130184347 [0002]

Claims (6)

Schweißring (10) zum Verbinden von Kunststoffrohren (20a, 20b), wobei der Schweißring (10) einen Schweißringkörper (11) aufweist, der einen inneren, mit einem Hohlraum (12) versehenen Dehnschlauch (13) umfasst, um den ein mit einem Schweißautomat (16) verbundener Widerstandsheizdraht (15) geführt ist, welcher von einer Kunststoffumhüllung (14) umgeben ist, die nach einem Aufschmelzen eine vollständige stoffschlüssige Verbindung von ineinander greifenden Kunststoffrohren (20a, 20b) herbeiführt, dadurch gekennzeichnet, dass der Schweißring (10) mindestens einen Luftdurchlass (17) aufweist, der von einer Außenseite des Schweißringkörpers (11) zum Hohlraum (12) des Dehnschlauches (13) führt.Welding ring ( 10 ) for connecting plastic pipes ( 20a . 20b ), whereby the welding ring ( 10 ) a welding ring body ( 11 ) having an inner, with a cavity ( 12 ) provided expansion hose ( 13 ) to the one with a welding machine ( 16 ) connected resistance heating wire ( 15 ) guided by a plastic covering ( 14 ) is surrounded, which after melting a complete cohesive connection of interlocking plastic pipes ( 20a . 20b ), characterized in that the welding ring ( 10 ) at least one air passage ( 17 ), which from an outer side of the welding ring body ( 11 ) to the cavity ( 12 ) of the expansion tube ( 13 ) leads. Schweißring (10) nach Anspruch 1, dadurch gekennzeichnet, dass der Luftdurchlass (17) aus einer Hülse (17a) aus einem thermisch stabilen Material gebildet ist, welche sich zwischen der Außenseite des Schweißringkörpers (11) und dem Hohlraum (12) erstreckt.Welding ring ( 10 ) according to claim 1, characterized in that the air passage ( 17 ) from a sleeve ( 17a ) is formed of a thermally stable material which extends between the outside of the welding ring body ( 11 ) and the cavity ( 12 ). Schweißring (10) nach Anspruch 1, dadurch gekennzeichnet, dass der Luftdurchlass (17) aus einem Schlauch (17b) aus einem thermisch stabilen Material gebildet ist, wobei sich der Schlauch (17b) vom Hohlraum (12) des Dehnschlauches (13) durch den Schweißringkörper (11) nach Außen erstreckt.Welding ring ( 10 ) according to claim 1, characterized in that the air passage ( 17 ) from a hose ( 17b ) is formed of a thermally stable material, wherein the hose ( 17b ) from the cavity ( 12 ) of the expansion tube ( 13 ) through the welding ring body ( 11 ) extends to the outside. Schweißring (10) nach Anspruch 3, dadurch gekennzeichnet, dass der Schlauch (17b) zumindest teilweise zusammen mit einem zum Widerstandsheizdraht (15) führenden Kontaktdraht (K) in einem gemeinsamen Mantel angeordnet ist. Welding ring ( 10 ) according to claim 3, characterized in that the hose ( 17b ) at least partially together with a resistance heating wire ( 15 ) leading contact wire (K) is arranged in a common jacket. Schweißring (10) nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass das thermisch stabile Material der Hülse (17a) oder des Schlauches (17b) Teflon ist.Welding ring ( 10 ) according to one of claims 2 to 4, characterized in that the thermally stable material of the sleeve ( 17a ) or the hose ( 17b ) Teflon is. Schweißring (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schweißring (10) eine Mehrzahl von Luftdurchlässen (17) aufweist.Welding ring ( 10 ) according to one of the preceding claims, characterized in that the welding ring ( 10 ) a plurality of air passages ( 17 ) having.
DE102016104842.9A 2016-03-16 2016-03-16 Welding ring for connecting plastic pipes Active DE102016104842B4 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3226575C1 (en) * 1982-07-16 1984-03-01 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim Device for connecting
DE20213972U1 (en) * 2002-09-06 2002-11-21 Henze GmbH Kunststoffwerk, 53840 Troisdorf Connection section of a plastic tube and connection arrangement with a connection section and a connection section
DE102013018434A1 (en) 2013-11-04 2015-05-07 Markus Guldner Method for welding plastic pipes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3226575C1 (en) * 1982-07-16 1984-03-01 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim Device for connecting
DE20213972U1 (en) * 2002-09-06 2002-11-21 Henze GmbH Kunststoffwerk, 53840 Troisdorf Connection section of a plastic tube and connection arrangement with a connection section and a connection section
DE102013018434A1 (en) 2013-11-04 2015-05-07 Markus Guldner Method for welding plastic pipes

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