DE2628318A1 - Sleeve-like resilient plastic seal with heating elements - for spigot and socket joint for plastic-coated pipes - Google Patents

Sleeve-like resilient plastic seal with heating elements - for spigot and socket joint for plastic-coated pipes

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Publication number
DE2628318A1
DE2628318A1 DE19762628318 DE2628318A DE2628318A1 DE 2628318 A1 DE2628318 A1 DE 2628318A1 DE 19762628318 DE19762628318 DE 19762628318 DE 2628318 A DE2628318 A DE 2628318A DE 2628318 A1 DE2628318 A1 DE 2628318A1
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DE
Germany
Prior art keywords
sealing body
plastic
heating elements
sleeve
body according
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.)
Pending
Application number
DE19762628318
Other languages
German (de)
Inventor
Karl Heinz Vahlbrauk
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19762628318 priority Critical patent/DE2628318A1/en
Publication of DE2628318A1 publication Critical patent/DE2628318A1/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • 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
    • B29C65/3484—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 non-metallic
    • B29C65/3488—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 non-metallic being an electrically conductive polymer

Abstract

Sleeve-like resilient plastic seal for spigot and socket joint for plastic-coated pipes comprises, at least along part of its length, facing towards its outer wall as surrounding its whole circumference, >=1 electric heating elements of which the terminal wires open out at its end face. Pref. in the sleeve section with the heating elements 1 annular recess is formed opening towards the outer wall, for receiving additional sealing cpd. The edge of the sleeve facing towards the spigot pipe end may be turned inwards. The seal allows easy prodn. of a reliable sealed spigot and socket joint.

Description

Dichtungskörper für Einsteckmuffenverbindungen Sealing body for socket joints

Die Erfindung bezieht sich auf einen hülsen-oder manschettenförmigen Dichtungskörper aus elastischem Kunststoff für Einsteckmuffenverbindungen von Rohren, insbesondere von kunststoffbeschichteten Rohren. The invention relates to a sleeve or sleeve-shaped Sealing body made of elastic plastic for socket joints of pipes, especially of plastic-coated pipes.

Bei der Herstellung von Rohrverbindungen und insbesondere von Einsteckmuffenverbindungen in der Installationstechnik ist einerseits die einfache Montage und andererseits die Dichtheit und Korrosionsfestigkeit der hergestellten Verbindung von besonderer Bedeutung. Es sind verschiedene Dichtungskörper der eingangs angegebenen Art bekanntgeworden. In the production of pipe connections and especially of socket joints In installation technology, on the one hand, there is simple assembly and, on the other hand the tightness and corrosion resistance of the connection made is particularly important Meaning. Various sealing bodies of the type specified at the beginning have become known.

Diese Dichtungskörper werden in den Aufnahmespalt der Einsteckmuffenverbindung entweder lose eingebracht und durch die elastische Verformung infolge des Einsteckvorgangs oder durch zusätzliche Kleber gehalten. Durch diese Maßnahmen ist jedoch eine sichere Halterung und Abdichtung des Dichtungskörpers nicht ausreichend gewährleistet, wobei die Einbringung der Klebstoffe und deren richtige Dosierung umständlich und im Erfolg unsicher bleibt.These sealing bodies are inserted into the receiving gap of the push-in socket connection either inserted loosely and by the elastic deformation as a result of the insertion process or held by additional glue. Through these measures is However a secure mounting and sealing of the sealing body is not sufficiently guaranteed, the introduction of the adhesives and their correct dosage cumbersome and remains unsure of success.

Der Erfindung liegt die Aufgabe zugrunde, einen Dichtungskörper der eingangs angegebenen Art zu schaffen, mit dessen Hilfe eine besonders einfache Herstellung einer sicheren und insbesondere dichten Einsteckmuffenverbindung ermöglicht wird, Dies wird nach der Erfindung dadurch erreicht, daß wenigstens auf einem Abschnitt der Länge des Dichtungskörpers, dessen Außenwand zugekehrt sowie dessen gesamten Umfang umgebend ein oder mehrere elektrische Heizelemente angeordnet sind, deren elektrische Anschlußleitungen an einer Stirnfläche austreten. Ein derartiger Dichtungskörper kann in der üblichen Weise in die Einsteckmuffenverbindung eingeführt werden. Danach wird über die elektrischen Heizelemente eine Erwärmung insbesondere im Bereich der Außenwandung des Dichtungskörpers erzeugt, die auf der jeweils gewünschten Fläche mit Sicherheit ein Schmelzen der jeweils eingebrachten Kunststoffmasse mit sich bringt, insbesondere bei kunststoffbeschichteten Rohren eine innige Verschmelzung der Kunststoffbeschichtung mit dem jeweils eingebrachten Kunststoff oder Kleber, so daß nach der Abkühlung und Aushärtung eine innige Verbindung der Kunststoffmassen, des Dichtungskörpers und der Rohrenden erzielt wird, die zu einer sicheren Abdichtung und zu einer hohen Beständigkeit der Verbindung führt. Dabei wird der Vorteil erzielt, daß diese Herstellung der Verbindung nicht von der Einbringung der Wärme von außen über eine Wärmezange o.dgl. oder von einer chemischen Reaktion innerhalb der Verbindung abhängt, vielmehr gewährleisten die Heizelemente im Dichtungskörper selbst die gewünschte Verbindung. The invention has for its object to provide a sealing body of To create specified type, with the help of a particularly simple production a secure and, in particular, tight plug-in socket connection is made possible, This is achieved according to the invention in that at least one section the length of the sealing body, its outer wall facing and its entire Circumference surrounding one or more electrical heating elements are arranged, the electrical connection lines emerge at one end face. Such a sealing body can be inserted into the socket joint in the usual way. Thereafter is a heating especially in the area of the electrical heating elements Outer wall of the sealing body produced on the respectively desired area certainly a melting of the respectively introduced plastic mass with it brings, especially with plastic-coated pipes, an intimate fusion the plastic coating with the plastic or adhesive introduced in each case, so that after cooling and hardening an intimate connection of the plastic masses, of the sealing body and the pipe ends is achieved, leading to a secure seal and leads to a high resistance of the connection. Thereby the advantage is achieved that this establishment of the connection does not depend on the introduction of heat from outside using heat tongs or the like. or from a chemical reaction within the compound depends, rather the heating elements in the seal body ensure the desired Link.

Nach einer Ausführungsform der Erfindung ist auf dem Heizelemente enthaltenden Längenabschnitt des Dichtungskörpers wenigstens eine zur Außenwand gekehrte offene ringförmige Ausnehmung zur Aufnahme zusätzlicher Dichtungsmasse eingeformt. Hierdurch ist es möglich, eine sichere Dosierung der für die Abdichtung einzubringenden Kunststoffmasse zu erreichen und bei Erwärmung über die Heizelemente eine sichere Verschmelzung dieser Kunststoffmasse im gesamten Verbindungs- und Dichtungsbereich zu bewirken. According to one embodiment of the invention is on the heating elements containing length portion of the sealing body at least one to the outer wall inverted open annular recess for receiving additional sealing compound molded. This makes it possible to ensure a safe dosage for the seal to be introduced plastic mass to achieve and when heated via the heating elements a safe fusion of this plastic compound in the entire connection and sealing area to effect.

Zweckmäßig ist dabei der dem Einsteckrohrende zugekehrte Rand des Dichtungskörpers nach innen eingezogen geformt, um eine sichere Aufnahme des Einsteckrohrendes dabei zu gewährleisten, Zweckmäßig wird als Werkstoff für den Dichtungskörper ein elastischer, im Erwärmungstemperaturbereich hitzebeständiger Thermoplast gewählt, insbesondere ein Polyamid.The edge of the end facing the plug-in pipe is useful Sealing body molded inwardly to securely accommodate the plug-in pipe end To ensure this, it is expedient to use a material for the sealing body elastic, heat-resistant thermoplastic selected in the heating temperature range, especially a polyamide.

Die in die ringförmige Ausnehmung einzubringende Dichtungsmasse besteht dann zweckmäßig aus einem Duroplast, der durch die Erwärmung schmelzbar ist, z.B. ein kalthärtender duroplastischer Kitt, Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der Zeichnung. Die Zeichnung zeigt einen Längsschnitt durch eine mit dem Dichtungskörper nach der Erfindung hergestellte Einsteckmuffenverbindung, und zwar in der linken Hälfte vor der Erwärmung und in der rechten Hälfte im endgültigen Zustand nach der Erwärmung.The sealing compound to be introduced into the annular recess is made then expediently made of a thermosetting plastic which can be melted by the heating, e.g. a cold-setting thermoset putty, other features, details and advantages of the invention emerge from the following description of an exemplary embodiment based on the drawing. The drawing shows a longitudinal section through one with the Sealing body produced according to the invention, insert socket connection, namely in the left half before heating and in the right half in the final Condition after heating.

Die Einsteckmuffenverbindung besteht zunächst aus dem zu einer Muffe aufgeweiteten Rohrende 1 und dem Einsteckrohrende 2, die kunststoffbeschichtet sind, In den Aufnahmespalt zwischen der Muffe 1 und dem Einsteckrohrende 2 ist der hülsen- oder manschettenförmige Dichtungskörper 3 aus elastischem Kunststoff eingebracht, insbesondere aus elastischem, im Erwärmungstemperaturbereich hitzebeständigem Thermoplast. Auf einem Abschnitt der Länge des Dichtungskörpers 3 und seiner Außenwand zugekehrt sowie seinen gesamten Umfang umgebend sind Heizelemente 4, zweckmäßig in Gestalt einer Heizwendel, eingebettet, deren elektrische Anschlußleitungen 5 an der Stirnfläche 6 des Dichtungskörpers 3 austreten. The push-in socket connection initially consists of a socket expanded pipe end 1 and the plug-in pipe end 2, which are plastic-coated, In the receiving gap between the socket 1 and the plug-in pipe end 2 is the sleeve or sleeve-shaped sealing body 3 made of elastic plastic introduced, in particular made of elastic thermoplastic, which is heat-resistant in the heating temperature range. On a portion of the length of the sealing body 3 and facing its outer wall as well as surrounding its entire circumference are heating elements 4, expediently in shape a heating coil, embedded, the electrical connection lines 5 of which on the end face 6 of the sealing body 3 emerge.

Auf seinem Heizelemente 4 enthaltenden Längenabschnitt sind in den Dichtungskörper zur Außenwand gekehrte offene ringförmige Ausnehmungen 7 eingeformt, und es verläuft zweckmäßig wenigstens jeweils ein Abschnitt des Heizelements 4 im Grund dieser Ausnehmungen 7o Diese Ausnehmungen 7 dienen, wie die Zeichnung zeigt, zur Aufnahme zusätzlicher Dichtungsmasse 8. Schließlich ist der dem Einsteckrohrende zugekehrte Rand 9 des Dichtungskörpers nach innen eingezogen geformt, um so die Stirnfläche des Einsteckrohrendes 2 aufzunehmen, wie die Zeichnung zeigt, Mit der eingebrachten Dichtungsmasse 8, zaBo in Gestalt eines kalthärtenden duroplastischen Kitts, wird der Dichtungskörper 3 bei der Montage entweder nach Aufschieben auf das Einsteckrohrende 2 und dessen Einschieben in die Muffe 1 oder durch vorheriges Einbringen in die Muffe 1 und nachträgliches Einschieben des Einsteckrohrendes 2 in den Aufnahmespalt eingebracht. Danach werden die elektrischen Anschlußleitungen 5 an eine geeignete Stromquelle angeschlossen und damit die Heizelemente 4 beaufschlagt, die insbesondere den Außenwandbereich des Dichtungskörpers 3 erwärmen auf eine Temperatur, bei der die eingebrachte Kunststoffmasse 8 und die Kunststoffbeschichtung der Rohrenden 1,2 zum Schmelzen gebracht wird, so daß sich anschließend eine innige stoff- und formflüssige Verbindung zwischen den Rohrenden 1 und 2 ergibt. Wie die Beschreibung und die Zeichnung zeigen, wird diese dichte und feste Verbindung allein durch den erfindungsgemäß ausgebildeten Dichtungskörper hergestellt, ohne daß es der Zufuhr von Wärme über äußere Werkzeuge oder auch einer mechanischen Verformung von außen bedarf, Nach einer weiteren Ausführungsform der Erfindung können als Heizelement oder Heizelemente auch elektrischleitende und als Widerstandsheizelement dienende Kunststoffe verwendet werden. Dazu kann entweder der gesamte Dichtungskörper aus diesem Kunststoff bestehen, wenn seine für die Dichtungsfunktion im übrigen erforderlichen Eigenschaften dabei gewahrt bleiben, oder es werden wenigstens in dem jeweils zu beheizenden Abschnitt des Dichtungskörpers solche Kunststoffe verwendet, Es kann auch der Dichtungskörper an den jeweils zu beheizenden Abschnitten mit einem solchen Kunststoff beschichtet sein. Derartige Kunststoffe sind geeignet, bei Anschluß an eine Spannungsquelle als Widerstandsheizelement zu dienen, Die jeweils aus solchem Kunststoff bestehenden Abschnitte des Dichtungskörpers sind in geeigneter Weise mit den elektrischen Anschlußleitungen zu versehen, Als besonders zweckmäßig als ein derartiger,als Widerstandsheizelement dienender Kunststoff hat sich ein elektrisch leitfähiger Silikonkautschuk erwiesen, wie er z.B. unter den Bezeichnungen SIK 8520, SIK 8853 und SIK/VP 336 im Handel angeboten wird. On its heating elements 4 containing length section are in the Sealing body facing open annular recesses 7 molded into the outer wall, and it expediently runs at least one section of the heating element 4 in each case Reason for these recesses 7o These recesses 7 are used, as the drawing shows, to accommodate additional sealing compound 8. Finally, the end of the plug-in pipe facing edge 9 of the sealing body drawn inwardly so as to the To include the end face of the plug-in pipe end 2, as the drawing shows, with the introduced sealing compound 8, zaBo in the form of a cold-curing thermoset Kitts, the sealing body 3 is either pushed on during assembly the plug-in pipe end 2 and its insertion into the socket 1 or by previous Insertion into the socket 1 and subsequent insertion of the plug-in pipe end 2 introduced into the receiving gap. Then the electrical connection lines 5 connected to a suitable power source and thus applied to the heating elements 4, the particular heat the outer wall area of the sealing body 3 to a temperature at which the introduced plastic compound 8 and the plastic coating the pipe ends 1.2 is brought to melt, so that then an intimate Material and form fluid connection between the pipe ends 1 and 2 results. As the The description and the drawing show this tight and firm connection alone produced by the sealing body formed according to the invention without it the supply of heat via external tools or mechanical deformation from the outside, according to a further embodiment of the invention can be used as a heating element or heating elements also electrically conductive and serving as resistance heating elements Plastics are used. Either the entire sealing body can be used for this this plastic exist if its otherwise required for the sealing function Properties are preserved, or at least they are in each case heating section of the sealing body uses such plastics, It can also the sealing body on the sections to be heated with one Plastic coated. Such plastics are suitable when connected to a voltage source to serve as a resistance heating element, each consisting of such Plastic existing sections of the seal body are suitable to provide the electrical connection cables, As special has expediently as such a plastic serving as a resistance heating element an electrically conductive silicone rubber, such as that found under the Designations SIK 8520, SIK 8853 and SIK / VP 336 is offered in stores.

Claims (7)

Ansprüche 2. Hülsen- oder manschettenförmiger Dichtungskörper aus elastischem Kunststoff für Einsteckmuffenverbindungen von Rohren, insbesondere von kunststoffbeschichteten Rohren, dadurch gekennzeichnet, daß wenigstens auf einem Abschnitt seiner Länge, seiner Außenwand zugekehrt sowie seinen gesamten Umfang umgebend ein oder mehrere elektrische Heizelemente (4) angeordnet sind, deren elektrischen Anschlußleitungen (5) an einer Stirnfläche (6) austreten. Claims 2. sleeve-shaped or sleeve-shaped sealing body elastic plastic for socket connections of pipes, in particular of plastic-coated pipes, characterized in that at least one Section of its length, facing its outer wall and its entire circumference surrounding one or more electrical heating elements (4) are arranged, their electrical Connection lines (5) emerge at an end face (6). 20 Dichtungskörper nach Anspruch 1, dadurch gekennzeichnet, daß auf seinem Heizelemente (4) enthaltenden Längenabschnitt wenigstens eine zur Außenwand gekehrte offene ringförmige Ausnehmung (7) zur Aufnahme zusätzlicher Dichtungsmasse (8) eingeformt ist. 20 sealing body according to claim 1, characterized in that on its length section containing heating elements (4) at least one to the outer wall inverted open annular recess (7) for receiving additional sealing compound (8) is molded. 3. Dichtungskörper nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß sein dem Einsteckrohrende (2) zugekehrter Rand (9) nach innen eingezogen geformt ist. 3. Sealing body according to claims 1 and 2, characterized in that that its edge (9) facing the plug-in pipe end (2) is drawn inwardly is. 4. Dichtungskörper nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß er aus elastischem, im Erwärmungstemperaturbereich hitzebeständigem Thermoplast besteht. 4. Sealing body according to one of claims 1 to 3, characterized in that that it is made of elastic thermoplastic, which is heat-resistant in the heating temperature range consists. 5. Dichtungskörper nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Heizelement oder die Heizelemente aus einer oder mehreren in den Werkstoff des Dichtungskörpers (3) eingebetteten Heizwendeln (4) besteht bzw. bestehen. 5. Sealing body according to one of claims 1 to 4, characterized in that that the heating element or the heating elements of one or more in the material of the sealing body (3) embedded heating coils (4) exists or exist. 6. Dichtungskörper nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als Heizelement oder-elemente der Dichtungskörper wenigstens in dem zu beheizenden Abschnitt aus einem elektrischleitenden und als Widerstandsheizelement dienenden Kunststoff besteht oder mit diesem beschichtet ist. 6. Sealing body according to one of claims 1 to 4, characterized in that that as a heating element or elements of the sealing body at least in the one to be heated Section made of an electrically conductive and used as a resistance heating element Plastic consists or is coated with this. 7. 7.Dichtungskörper nach Anspruch 6, dadurch gekennzeichnet daß der Kunststoff ein elektrisch leitfähiger Silikonkautschuk ist.7. 7.Sealing body according to claim 6, characterized in that the Plastic is an electrically conductive silicone rubber.
DE19762628318 1976-06-24 1976-06-24 Sleeve-like resilient plastic seal with heating elements - for spigot and socket joint for plastic-coated pipes Pending DE2628318A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762628318 DE2628318A1 (en) 1976-06-24 1976-06-24 Sleeve-like resilient plastic seal with heating elements - for spigot and socket joint for plastic-coated pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762628318 DE2628318A1 (en) 1976-06-24 1976-06-24 Sleeve-like resilient plastic seal with heating elements - for spigot and socket joint for plastic-coated pipes

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DE2628318A1 true DE2628318A1 (en) 1977-12-29

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648077A1 (en) * 1989-06-09 1990-12-14 Boulet D Auria Terlizzi Method of joining two tubular elements made of plastic by electrofusion (electrical fusion bonding) and electrofusion coupling for implementing this method
DE102005024590B3 (en) * 2005-05-25 2006-12-28 Da-Kunststoff Gmbh Connecting system for metal valve and plastic pipe comprises plastic sleeve which fits over pipe, between it and connection on valve, snap-ring with C-shaped cross-section fitting over flange on end of connection and shoulder on sleeve
DE102006006956B3 (en) * 2005-05-25 2007-03-22 Da-Kunststoff Gmbh Connecting system for metal valve and plastic pipe comprises plastic sleeve which fits over pipe, between it and connection on valve, snap-ring with C-shaped cross-section fitting over flange on end of connection and shoulder on sleeve
CN102338254A (en) * 2011-05-04 2012-02-01 杨蒙 Pre-socket induction heating butt fusion plastic pipe fitting
CN102720911A (en) * 2012-04-20 2012-10-10 杨蒙 Medium-high frequency electromagnetic induction heating fusion steel-plastic composite pipe connecting unit
CN102720901A (en) * 2012-04-20 2012-10-10 杨蒙 Electromagnetic induction welding steel-plastic composite pipe connection kit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648077A1 (en) * 1989-06-09 1990-12-14 Boulet D Auria Terlizzi Method of joining two tubular elements made of plastic by electrofusion (electrical fusion bonding) and electrofusion coupling for implementing this method
DE102005024590B3 (en) * 2005-05-25 2006-12-28 Da-Kunststoff Gmbh Connecting system for metal valve and plastic pipe comprises plastic sleeve which fits over pipe, between it and connection on valve, snap-ring with C-shaped cross-section fitting over flange on end of connection and shoulder on sleeve
DE102006006956B3 (en) * 2005-05-25 2007-03-22 Da-Kunststoff Gmbh Connecting system for metal valve and plastic pipe comprises plastic sleeve which fits over pipe, between it and connection on valve, snap-ring with C-shaped cross-section fitting over flange on end of connection and shoulder on sleeve
CN102338254A (en) * 2011-05-04 2012-02-01 杨蒙 Pre-socket induction heating butt fusion plastic pipe fitting
CN102720911A (en) * 2012-04-20 2012-10-10 杨蒙 Medium-high frequency electromagnetic induction heating fusion steel-plastic composite pipe connecting unit
CN102720901A (en) * 2012-04-20 2012-10-10 杨蒙 Electromagnetic induction welding steel-plastic composite pipe connection kit

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