DE2223166A1 - PROCEDURE AND ARRANGEMENT FOR INSERTING REPLACEMENT PIECES IN FIXED THERMOPLASTIC PIPELINES - Google Patents

PROCEDURE AND ARRANGEMENT FOR INSERTING REPLACEMENT PIECES IN FIXED THERMOPLASTIC PIPELINES

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Publication number
DE2223166A1
DE2223166A1 DE19722223166 DE2223166A DE2223166A1 DE 2223166 A1 DE2223166 A1 DE 2223166A1 DE 19722223166 DE19722223166 DE 19722223166 DE 2223166 A DE2223166 A DE 2223166A DE 2223166 A1 DE2223166 A1 DE 2223166A1
Authority
DE
Germany
Prior art keywords
heating
arrangement
heating device
sleeve
running rail
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
DE19722223166
Other languages
German (de)
Inventor
Leo Mayer
Erwin Mueller
Alfred Dipl-Ing Ruehle
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19722223166 priority Critical patent/DE2223166A1/en
Publication of DE2223166A1 publication Critical patent/DE2223166A1/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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8182—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects
    • B29C66/81821—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
    • B29C65/68—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined using auxiliary shrinkable elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • 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
    • 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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/18—Appliances for use in repairing pipes

Landscapes

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

Description

Verfahren und Anordnung zum Einfügen von Ersatzstücken in festverlegte thermoplastische Rohrleitungen Die Erfindung betrifft ein- Verfahren und eine Anordnung zum Einfügen von Ersatzstücken in fest verlegte Rohrleitungen aus thermoplastischem Material. Method and arrangement for inserting replacement parts in permanently installed thermoplastic pipelines The invention relates to a method and an arrangement for inserting replacement parts in permanently installed thermoplastic pipes Material.

Wenn ein Teilstück einer derartigen Rohrleitung ausgewechselt werden muß, sei es,daß es schadhaft ist oder daß es durch ein T-Stück für eine Abzweigleitung ersetzt werden soll, steht man vor dem Problem, daß man nicht, wie bei frei beweglichen Werkstücken die aneinander zu schweißenden Teile von beiden Seiten der Heizvorrichtung zur erweichung zuführen , dann wieder vonx ihr trennen und nach Ausschwenken der Heizvorrichtung aus der Arbeitsbahn zur Verschweißung wieder aneinander führen kann. When replacing a section of such a pipeline must, be it that it is defective or that it is through a T-piece for a branch line is to be replaced, one is faced with the problem that one cannot, as with freely movable Workpieces the parts to be welded together from both sides of the heating device add to soften, then separate from x again and after swiveling out the Heating device from the working path for welding can lead to one another again.

Bei fest verlegten Leitungen ist im allgemeinen nur die an jeder Trennstelle zu verwejndende Sch#eißitniffe beweglich,welche die Trennstelle überbrücken soll.In the case of permanently installed lines, there is generally only one at each separation point Shut notches to be used movable, which should bridge the separation point.

Aus dieser Lage ergibt sich, daß man für die Justier- und Haltevorrichtungen sowie auch für die Heizvorrichtung Körper-verwenden muß, die in einer Mittelebene zweigeteilt sind. From this situation it follows that one for the adjusting and holding devices as well as for the heating device body-must use that in a central plane are divided into two parts.

Die in der Arbeitsstellung die Rohrleitung ring«förmig umschließenden Geräteteile können so ausgebildet sein, daß ihre Hälften über ein Getriebe voneinander abgehoben und aufeinander gesenkt werden können oder aber sie lassen sich mit Scharnieren versehen, die ein Auf- und Zuklappen gestatten. In the working position, they surround the pipeline in a ring shape Device parts can be designed so that their halves are separated by a gear can be raised and lowered on top of each other or they can be hinged provided that allow opening and closing.

Um die Schweißarbeiten absolut erschütterungsfrei ausführen zu können, sind die auf einer Laufschiene relativ zueinander verschieblichen Geräteteile, nämlich die zum Halten und Justieren der Werkstücke dienenden Halter wie auch die Heizvorrichtung mitsamt ihrer Laufsohiene an einer Muffe befestigt, welche auf einem gegen eine Raumdecke Oedgl. anpreßbaren Sprießrohr verschieb-und arretierbar ist. Zweckmäßig ist zwischen Muffe und Laufschiene ein Doppelgelent vorgesehen, mit dessen Hilfe man die Laufschiene exakt parallel zu der zu bearbeitenden Rohrleitung einrichten kann. In order to be able to carry out the welding work absolutely vibration-free, are the device parts which can be moved relative to one another on a running rail, namely the holder used to hold and adjust the workpieces as well as the heating device together with its barrel rail attached to a sleeve, which on one against one Room ceiling Oedgl. compressible sprout sliding and lockable is. A double gel is expediently provided between the sleeve and the running rail, with the help of which the running rail is exactly parallel to the pipeline to be processed can set up.

Die Schweißarbeiten an thermoplastischen Rohrleitungen müssen wegen der eng eingegrenzten Erweichungstemperatur und der schnellen Erhärtung rasch durchgeführt werden. Infolgedessen bedient man sich gern eines Servotriebes für die Bewegung der Geräteteile auf der Laufschiene. Ein solcher kann pneumatischer oder ~elektromotorischer Natur sein. Die Servovorrichtung ist zweckma'ßig mit der Laufschniene verbunden und mit dem gesamten Gerät gemeinsam am Sprießrohr verfahrbar. The welding work on thermoplastic pipelines must be due to the narrowly limited softening temperature and the rapid hardening carried out quickly will. As a result, one likes to use a servo drive for the movement of the device parts on the running rail. This can be pneumatic or electromotive Be nature. The servo device is expediently connected to the running rail and can be moved together with the entire device on the sprout.

Im Folgenden wird anhand der beigefügten schematischen Figuren das Verfahren und die Anordnung nach der Erfindung näher erläutert: Figur 1 veranschaulicht eine Gesamtdarstellung, Figur 2 zeigt im Schnitt eine Heizvorrichtung mit doppelt angelegten Heizelementen, und Figur 3 ist die Ansicht einer um den tragenden Schaft schwenkbaren Heizvorrichtung. The following is based on the attached schematic figures The method and the arrangement according to the invention are explained in more detail: FIG. 1 illustrates an overall view, Figure 2 shows in section a heating device with double applied heating elements, and Figure 3 is a view of one around the supporting shaft swiveling heater.

Die thermoplastische Rohrleitung 1 ist mit Abstand unterhalb einer Raumdecke verlegt. Ein mit 2 bezeichnetes Rohrstück soll gegen ein anderes ausgewechselt werden, welches während des Schweißvorganges, achsgleich mit der Rohrleitung justiert, fixiert werden muß. Auf dem gegen die Raumdecke anpreßbaren Sprießrohr 3 befindet sich eine Muffe 3', atwelcher zusammen mit dem SerwSrieb 4 die die Geräteteile tragende Laufschiene 5 befestigt ist. The thermoplastic pipe 1 is at a distance below a Relocated ceiling. A pipe section marked 2 is to be exchanged for another which is adjusted on the same axis with the pipeline during the welding process, must be fixed. Located on the spout 3 which can be pressed against the ceiling a sleeve 3 ', at which, together with the service drive 4, the one that carries the device parts Running rail 5 is attached.

Auf der Schiene befinden sich, relativ gegeneinander verschiebbar, die im geöffneten Zustand über die Rohrleitung 1 schiebbaren Einzelteile, nämlich zwei zum Fixieren der Rohrleitung und des einzusetzenden Rohrstückes 2a dienende Halter 8 und 9, der die Schweißmuffe 6 aufnehmende Halter 10 und die mit einem aufheizbaren Hohldorn 11 und einem inneren Heizring 11'versehene Heizvorrichtung 12, die über ein Sttergerät 13 betrieben wird und um eine zur Laufschiene 5 parallele Achse 14 schwenkbar gelagert ist. Die Enden der Rohrstümpfe der aufgeschnittenen Rohrleitung 1 sowie die äußeren Enden des Ersatzstüekes 2a sind mit Irilfsmuffen 15 mit untereinander gleichem Durchmesser versehen.There are on the rail, which can be moved relative to one another, the individual parts that can be pushed in the open state via the pipeline 1, namely two serving to fix the pipeline and the pipe section 2a to be used Holder 8 and 9, the holder 10 receiving the welding socket 6 and the holder 10 with a heatable Hollow mandrel 11 and an inner heating ring 11 'provided heating device 12, which over a static device 13 is operated and about an axis 14 parallel to the running rail 5 is pivotably mounted. The ends of the pipe stubs of the cut pipe 1 and the outer ends of the spare parts 2a are with Irilfsmuffen 15 with each other provided with the same diameter.

Das Verfahren nach der Erfindung wird folendermaßen durchgeführt: Herausschneiden des zu ersetzenden Rohrstückes 2 aus der Leitung 1 - Aufschieben zweier später zu verwendender Schweißmuffen 6 und 7 auf die Rohrstümpfe der aufgeschnittenen Leitung -Anbringung von Hilfsmuffen 15, 15'auf den Stumpfenden der Rohrleitung 1 wie auch den Enden des Ersatzstückes 2a - Einjustieren der miteinander zu verschweißenden Stücke in ihren Haltern 9,10 -Einstellung der Heizvorrichtung 12 mitder darin befindlichen, mit den Hilfsmuffen 15 bzw. 15'gegenüber dem die Schweißmuffe 6 enthaltenden Halter 10 rart. daß bei einer Verschiebunz der Heizvorrichtung auf die zu zugleich@@ diese auf den Heizdorn 11 und die Trennstelle mit den Hilfsmuffen in den inneren Heizring 11'hineingepreßt werden - Erweichen der miteinander zu verbindenden Teile - Öffnen und ausschwenken der Heizvorrichtung aus der Arbeitsbahn - Zusammenführen der zu verbindenden eine.The method according to the invention is carried out as follows: cutting out the pipe section 2 to be replaced from the line 1 - sliding two welding sleeves 6 and 7 to be used later on the pipe stubs of the cut pipe - attaching auxiliary sleeves 15, 15 'to the stub ends of the pipe 1 such as also the ends of the replacement piece 2a - adjustment of the pieces to be welded together in their holders 9, 10 - setting of the heating device 12 with the holder 10 located therein with the auxiliary sleeves 15 or 15 'opposite the holder 10 containing the welding sleeve 6. that with a displacement of the heater on the to at the same time @@ these are pressed onto the heating mandrel 11 and the separation point with the auxiliary sleeves in the inner heating ring 11 '- softening of the parts to be connected - opening and swiveling the heating device out of the working path - merging the one to be connected.

wobei die 6 auf die der Trennstelle zugehörenden Hilfsmuffen 15 aufgeschrumpft und mit ihnen verschweißt wird.where the 6 is shrunk onto the auxiliary sleeves 15 belonging to the separation point and welded to them.

Die miteinander verschweißenden Teile verbleiben , durch ihre Halter in ihrer Lage fixiert, in dieses, bis die Schweißstelle sich abgekühlt und die nötige Festigkeit erkalten hat.The parts that are welded together remain due to their holders Fixed in place in this until the weld cools down and the necessary Solidity has cooled down.

Anschließend wird der Vorgang mit Hilfe des zuvor auf den zur anderen Trennstelle gehörenden Rohrstumpf aufgeschobenen Nuffenringes 6'wiederholt. Then the process is carried out with the help of the previous one to the other Separation point belonging to the pipe stump of the pushed-on Nuffenringes 6 'repeated.

Die in der figur 2 dargestellte Ausführungsform einer Heizvorrichtung 12 besitzt#an jeden ihrer beiden Enden einen DEdorn 11 und im Inneren zwei getrennte Heizringe 11'. Im Mittelteil ist eine Wärmeisolation 11''vorgesehen. The embodiment of a heating device shown in FIG 12 has a DEdorn 11 at each of its two ends and two separate ones inside Heating rings 11 '. Thermal insulation 11 ″ is provided in the middle part.

Die in Abbildung 3 gezeigte Ansicht einer Heizvorrichtung 12 mit einseitig angebrachtem Heizdorn 11 läßt eine Muffe 16 erkennen, mittels derer sie - bis zu einem nicht dargestellten Anschlag -um den tragenden Schaft schwenkbar ist. The view shown in Figure 3 of a heating device 12 with Unilaterally attached heating mandrel 11 reveals a sleeve 16 by means of which it - Swiveling around the supporting shaft up to a stop (not shown) is.

Beide Ausführungsformen machen ein Umsetzen der Heisvorrichtung auf der Schiene entbehrlich, wenn nach fertiger Verschweißung an der einen Trennstelle zur anderen übergegangen werden soll. Both embodiments make a transfer of the heating device the rail can be dispensed with if, after the welding has been completed, at one point of separation to be passed on to the other.

Claims (4)

PatentansprücheClaims 1. Verfahren zum Einfügen von Ersatzstücken in festverlegte thermoplastische Rohrleitungen, dadurch gekennzeichnet, daß nach dem Heraustrennen des zu ersetzenden Rohrteiles die später zu verwendenden Schweißmuffen auf die R9hrstümpfe (1a,1b) lose aufgeschoben, darauf die Stumpfenden wie auch die Enden des Ersatzstückes (2a) mit Hilfsmuffen (15, 15') verschweißt werden und daß nach Einjustieren der miteinander zu verbindenden Stücke in ihren Haltern (8,9,10) die Heizvorrichtung (12) mit der von ihr umfaßten Trennstelle sowie der die Schweißmuffe enthaltende Halter (io) derart eingestellt werden, daß bei einer Verschiebung der Heizvorrichtung (12) auf die (6) zu zugleich diese auf den Heizdorn (11) und die Trennstelle mit den Hilfsntiiffen (15) in den inneren Heizring (11') hineiiepreßt werden und daß schließlich nach Durchführung dieses Vorganges die miteinander zu verbindenden Teile in bekannter Weise erweicht, zusammengefügt und verschweißt werden.1. A method for inserting replacement pieces into permanently installed thermoplastic pipes, characterized in that after the pipe part to be replaced has been separated out, the welding sleeves to be used later are pushed loosely onto the pipe stumps (1a, 1b), and the stump ends as well as the ends of the replacement part (2a ) are welded with auxiliary sleeves (15, 15 ') and that after adjusting the pieces to be connected to one another in their holders (8,9,10), the heating device (12) with the separating point it encompasses and the holder (io) containing the welding sleeve be set so that when the heating device (12) is moved to the (6) at the same time these are pressed onto the heating mandrel (11) and the separation point with the auxiliary supports (15) in the inner heating ring (11 ') and that finally after this process the parts to be connected are softened, joined and joined in a known manner be welded. 2. Anordnung zur Durchführung des Verfahrens nach Anspruch 1, gekennzeichnet durch ein gegen eine Raumdecke oder dgl. anpreßbares Sprießrohr (4), eine darauf verschieb- und arretierbare Muffe (3) mit einer quer zum Sprießrohr gerichteten Laufschiene (5) mit auf dieser verfahrbaren, zweigeteilten Justier-und Heizgeräten 2. Arrangement for performing the method according to claim 1, characterized by a against a ceiling or the like. Pressable Sproßrohr (4), one on it displaceable and lockable sleeve (3) with a transverse to the spout Running rail (5) with two-part adjustment and heating devices that can be moved on this 3. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Laufschiene (5), gegebenenfalls zusammen mit einem mit ihr verbundenen Servotrieb, schwenkbar an der Muffe (3) befestigt ist.3. Arrangement according to claim 1, characterized in that the running rail (5), optionally attached to the sleeve (3) so that it can pivot, together with a servo drive connected to it is. 4. Anordnung nach Anspruch 2 und 3, gekennzeichnet durch eine beidseitig mit je einem Heizdcrn an und je einem Heizring in der Heizvorrichtung versehene Anordnung.4. Arrangement according to claim 2 and 3, characterized by one on both sides each provided with a heating ring on and a heating ring in the heating device Arrangement. L e e r s e- i t eL e r s e i t e
DE19722223166 1972-05-12 1972-05-12 PROCEDURE AND ARRANGEMENT FOR INSERTING REPLACEMENT PIECES IN FIXED THERMOPLASTIC PIPELINES Pending DE2223166A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19722223166 DE2223166A1 (en) 1972-05-12 1972-05-12 PROCEDURE AND ARRANGEMENT FOR INSERTING REPLACEMENT PIECES IN FIXED THERMOPLASTIC PIPELINES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722223166 DE2223166A1 (en) 1972-05-12 1972-05-12 PROCEDURE AND ARRANGEMENT FOR INSERTING REPLACEMENT PIECES IN FIXED THERMOPLASTIC PIPELINES

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DE2223166A1 true DE2223166A1 (en) 1973-11-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998024613A1 (en) * 1996-12-04 1998-06-11 Rindo Marcassoli Welding device for plastic pipes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998024613A1 (en) * 1996-12-04 1998-06-11 Rindo Marcassoli Welding device for plastic pipes

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