DE2850927A1 - Thin walled tube joint - has tube end locked inside internally toothed collar and secured inside threaded fittings - Google Patents

Thin walled tube joint - has tube end locked inside internally toothed collar and secured inside threaded fittings

Info

Publication number
DE2850927A1
DE2850927A1 DE19782850927 DE2850927A DE2850927A1 DE 2850927 A1 DE2850927 A1 DE 2850927A1 DE 19782850927 DE19782850927 DE 19782850927 DE 2850927 A DE2850927 A DE 2850927A DE 2850927 A1 DE2850927 A1 DE 2850927A1
Authority
DE
Germany
Prior art keywords
ring
tube
pipe
thin
walled
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.)
Ceased
Application number
DE19782850927
Other languages
German (de)
Inventor
Yuji Satoh
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.)
O N IND Ltd
Original Assignee
O N IND Ltd
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 O N IND Ltd filed Critical O N IND Ltd
Publication of DE2850927A1 publication Critical patent/DE2850927A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/083—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the longitudinal cross-section of the ring not being modified during clamping
    • F16L19/086—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the longitudinal cross-section of the ring not being modified during clamping with additional sealing means
    • 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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
    • F16L19/065—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring
    • F16L19/0653—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring the ring being rotatably connected to one of the connecting parts
    • 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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/083—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the longitudinal cross-section of the ring not being modified during clamping

Abstract

The tube joint for a thin walled corrosion resistant steel tube (1) uses an internally toothed ring (3) which is locked onto the tube by expanding the tube by a suitable method. The ring is then locked inside the end of a fitting (7) with an enlarged externally threaded end (6) by a locking sleeve (4) already installed on the tube. This sleeve has an internal vertical face which engages the face of the sleeve. An O-ring (9) can be included between the counterbored part (8) of the fitting and the other face of the ring. An alternative design has a ring with sloping face fitting inside the sleeve. Another design has a rectangular section sealing ring.

Description

BESCHREIBUNC DESCRIPTIONUNC

Die Erfindung betrifft eine Vorrichtung zum Verbinden eines insbesondere aus einem korrosionsfesten Stahl bestehenden dünnwandigen Rohres mit einem Rohranschluß.The invention relates to a device for connecting a particular made of a corrosion-resistant steel, thin-walled pipe with a pipe connection.

Auf diesem Gebiet ist es bisher üblich, den Rohranschluß im Umfangsbereich des dünnwandigen Rohres partiell auf das Rohrende aufzupassen, so daß eine Überlappung entsteht, und danach die Verbindungsstelle durch Löten, Schweißen, Pressen oder auf eine ähnliche Weise fertigzustellen.In this field it has been customary to date, the pipe connection in the circumferential area of the thin-walled pipe to partially take care of the pipe end, so that an overlap arises, and then the connection point by soldering, welding, pressing or to finish in a similar way.

Eine auf diese Weise hergestellte herkömmliche Verbindung erlaubt keine spätere Trennung zwischen Rohr und Rohranschluß, ist stark korrosionsanfällig und kann nur geringe Zugkräfte bzw. Spannungen aufnehmen.A conventional connection established in this way allows no later separation between pipe and pipe connection, is very susceptible to corrosion and can only absorb low tensile forces or stresses.

Ferner ist bekannt, daß sich Löt- und Schweißarbeiten an Verbindungsstellen von relativ großkalibrigen Rohren aus korrosionsfestem Stahl schwierig ausführen lassen. Wenn es sich'wie im vorliegenden Falleldann noch um kleine, dünnwandige Rohre aus korrosionsfestem Stahl und entsprechende Rohranschlüsse handelt, dann wird die Herstellung einer solchen Verbindung noch schwieriger sein und hohe Ansprüche an die handwerklichen Fähigkeiten stellen.It is also known that soldering and welding work at connection points difficult to carry out of relatively large-caliber pipes made of corrosion-resistant steel permit. If, as in the present case, it is still small, thin-walled Corrosion-resistant steel pipes and corresponding pipe connections are then making such a connection will be even more difficult and high demands to the technical skills.

Der Erfindung liegt die Aufgabe zugrunde, eine einfach und auch von weniger qualifizierten Kräften zuverlässig herstellbare Verbindungsvorrichtung der eingangs genannten Art vorzuschlagen.The invention is based on the object of a simple and also of less qualified workers reliably manufacturable connecting device of the to propose the type mentioned at the beginning.

Die erfindungsgemäße Lösung ist im Patentanspruch 1 angegeben, vorteilhafte Weiterbildungen sind den Unteransprüchen entnehmbar.The solution according to the invention is specified in claim 1, advantageous Further developments can be found in the subclaims.

Die erfindungsgemäße Verbindungsvorrichtung zeichnet sich durch relativ einfache Herstellbarkeit, hohe Betriebsbelastbarkeit und geringe Korrosionsanfälligkeit aus. Ferner ist es ohne weiteres möglich, die erfindungsgemäße Verbindung bei Bedarf wieder in das dünnwandige Rohr einerseits und den Rohranschluß andererseits zu zerlegen.The connecting device according to the invention is characterized by relative easy to manufacture, high operational load capacity and low susceptibility to corrosion the end. Furthermore, it is easily possible to use the connection according to the invention if necessary to disassemble again into the thin-walled pipe on the one hand and the pipe connection on the other hand.

Nachstehend werden einige bevorzugte Ausführungsbeispiele der Erfindung unter Bezugnahme auf eine Zeichnung näher erläutert. Es zeigen: Fig. 1 bis 3 Längsschnitte durch unterschiedliche Ausführungsbeispiele für die erfindungsgemäße Rohrverbindung.Below are some preferred embodiments of the invention explained in more detail with reference to a drawing. They show: FIGS. 1 to 3 longitudinal sections through different embodiments for the pipe connection according to the invention.

In der Zeichnung ist ein aus einem korrosionsfesten Stahl bestehendes und für Innen-Installationszwecke vorgesehenes dünnwandiges Rohr 1 durch die nachstehend beschriebene Vorrichtung mit einem Rohranschluß 7 verbunden Die ursprünglich glatte zylindrische Oberfläche des Endabschnitts des dünnwandigen Rohres 1 ist mittels einer nicht dargestellten Expansionsvorrichtung so aufgeweitet worden, daß sie durch Materialverformung in formschlüssigen Eingriff mit Rillen 2 gebracht ist, die auf der inneren Umfangsoberfläche eines Ringes 3 vorhanden sind, welcher den Rohr-Endabschnitt umschließt. Auf diese Weise ist der Ring 3 fest mit dem dünnwandigen Rohr 1 verbunden.In the drawing, there is one made of corrosion-resistant steel and thin-walled pipe 1 for indoor installation purposes by the following described device connected to a pipe connection 7 The originally smooth cylindrical surface of the end portion of the thin-walled tube 1 is means an expansion device not shown has been expanded so that it by Material deformation is brought into positive engagement with grooves 2, which on the inner peripheral surface of a ring 3 are present, which the pipe end portion encloses. In this way, the ring 3 is firmly connected to the thin-walled tube 1.

Eine mit einem Innengewinde 6 versehene Überwurfmutter 4, die einen den am dünnwandigen Rohr 1 befestigten Ring 3 hintergreifenden Innenflansch 5 aufweist, ist auf ein entsprechendes Außengewinde des Rohranschlusses 7 aufgeschraubt. Zwischen der vorderen Stirnfläche des Ringes 3 und einer in den Rohranschluß 7 eingearbeiteten ringförmigen Ausnehmung 8 befindet sich ein 0-Ring 9, welcher die gemäß Fig. 1 fertig zusammengeschraubte Verbindungsvorrichtung nach außen hin einwandfrei abdichtet.A union nut 4 provided with an internal thread 6, which has a the ring 3 attached to the thin-walled pipe 1 has the inner flange 5 engaging behind it, is on a corresponding External thread of the pipe connection 7 screwed on. Between the front face of the ring 3 and one incorporated into the pipe connection 7 annular recess 8 there is an O-ring 9, which finished according to FIG screwed together connection device seals perfectly to the outside.

Zur Herstellung der in der Zeichnung dargestellten Verbindungsstelle wird zuerst der die Rillen 2 auf seiner Innenoberfläche tragende Ring 3 lose auf den Endabschnitt des dünnwandigen Rohres 1 aufgeschoben und dann der Rohr-Endabschnitt durch die zuvor erwähnte Expansionsvorrichtung aufgeweitet, so daß sich die Rillen 2 in die Rohraußenwand eingraben und eine formschlüssige Verbindung hergestellt wird. Dann wird der 0-Ring zwischen dem Endabschnitt des Rohres 1 und der Überwurfmutter 4 eingesetzt, und schließlich braucht nur noch die überwurfmutter 4 mit ihrem Innengewinde 6 auf das Außengewinde des Rohranschlusses 7 aufgeschraubt zu werden. Damit ist die in Fig. 1 dargestellte Verbindung fertig.To produce the connection point shown in the drawing the ring 3 carrying the grooves 2 on its inner surface becomes loose first the end portion of the thin-walled pipe 1 is pushed on and then the pipe end portion expanded by the aforementioned expansion device, so that the grooves 2 dig into the outer wall of the pipe and establish a positive connection will. Then the O-ring is between the end section of the pipe 1 and the union nut 4 is used, and finally all you need is the union nut 4 with its internal thread 6 to be screwed onto the external thread of the pipe connection 7. So is the connection shown in Fig. 1 finished.

Aufgrund der in die Außenoberfläche des Rohres 1 einqegrabenen Rillen 2 des Ringes 3 ist dieser formschlüssig und fest mit dem dünnwandigen Rohr 1 verbunden, und der Ring 3 wird sich auch dann nicht von dem Rohr lösen, wenn über den Innenflansch der Überwurfmutter 4 starke Zugkräfte in Richtung auf den Rohranschluß 7 auftreten, sei es beim Aufschrauben der Überwurfmutter 7 auf den Rohranschluß 7 oder aus anderen Gründen. Der 0-Ring 9 dichtet die Verbindungsstelle zuverlässig nach außen hin ab. Da die Verbindungsvorrichtung eine Verschraubung enthält, läßt sich der Rohranschluß 7 bei Bedarf ohne weiteres von dem dünnwandigen Rohr 1 aus korrosionsbeständigem Stahl trennen.Because of the grooves buried in the outer surface of the pipe 1 2 of the ring 3, this is positively and firmly connected to the thin-walled tube 1, and the ring 3 will not detach from the pipe even if it is over the inner flange the union nut 4 strong tensile forces occur in the direction of the pipe connection 7, be it when screwing the union nut 7 onto the pipe connection 7 or from others Establish. The O-ring 9 reliably seals the connection point from the outside. Since the connecting device contains a screw connection, the pipe connection 7 if necessary easily from the thin-walled tube 1 made of corrosion-resistant Separate steel.

Auch in dieser Beziehung ist die erfindungsgemäße Verbindungsvorrichtung den herkömmlichen gelöteten oder geschweißten Rohrverbindungen überlegen.The connecting device according to the invention is also in this respect superior to conventional soldered or welded pipe connections.

Ferner läßt sich die erfindungsgemäße Verbindungsvorrichtung jeder Zeit vor Ort und ohne besondere Fachkenntnisse herstellen, weil Säurebehandlungen oder andere Zusatzarbeiten überflüssig sind. Darüberhinaus ist die erfindungsgemäße Verbindungsvorrichtung sehr wenig korrosionsanfällig.Furthermore, the connecting device according to the invention can be any Produce time on site and without special expertise, because acid treatments or other additional work is unnecessary. In addition, the inventive Connection device very little susceptible to corrosion.

Bei dem in Fig. 2 dargestellten abgewandelten Ausführungsbeispiel besitzt der Ring 3 eine sphärische Oberfläche 10, die mit einer gegenüberliegenden konischen Oberfläche 11 des Rohranschlusses 7 in Kontakt gebracht ist. Auf diese Weise wird eine druckdichte Verbindungsstelle erzielt, ein 0-Ring ist überflüssig. Die Abdichtung erfolgt durch Metallkontakt zwischen Ring 3 und Rohranschluß 7.In the modified embodiment shown in FIG the ring 3 has a spherical surface 10, which with an opposite conical surface 11 of the pipe connection 7 is brought into contact. To this In this way, a pressure-tight connection point is achieved, an O-ring is superfluous. The seal is made by metal contact between ring 3 and pipe connection 7.

Bei der Ausführung von Fig. 3 ist als Leckdichtung eine flache Ringdichtung 12 zwischen dem Ring 3 und dem Rohranschluß 7 eingesetzt. Auch auf diese Weise erfolgt eine zuverlässige Abdichtung der Verbindungsstelle zwischen dem dünnwandigen Rohr 1 und dem Rohranschluß 7.In the embodiment of FIG. 3, a flat ring seal is used as a leak seal 12 inserted between the ring 3 and the pipe connection 7. Also done this way a reliable seal of the connection point between the thin-walled pipe 1 and the pipe connection 7.

Claims (5)

Vorrichtung zum Verbinden eines dünnwandigen Rohres. Device for connecting a thin-walled pipe. Priorität: 25. November 1978, Japan, No. 52-158515 PATENTANSPRÜCHE Vorrichtung zum Verbinden eines insbesondere aus einem korrosionsfesten Stahl bestehenden dünnwandigen Rohres mit einem Rohranschluß, dadurch gekennzeichnet, daß ein auf seiner inneren Oberfläche mit Rillen (2) versehener Ring (3) auf einen Endabschnitt des dünnwandigen Rohres (1) aufgeschoben und durch Aufweiten des Rohr-Endabschnitts mit dem dünnwandigen Rohr (1) formschlüssig verbunden ist; und daß eine an den Rohranschluß (7) anschraubbare Mutter (4) relativ zu dem am Rohr (1) befestigten Ring (3) verdrehbar und in Axialrichtung in Bezug auf den Ring (3) durch Anschlagmittel festgelegt ist.Priority: November 25, 1978, Japan, No. 52-158515 PATENT CLAIMS Device for connecting a particularly made of a corrosion-resistant steel thin-walled pipe with a pipe connection, characterized in that a its inner surface with grooves (2) provided ring (3) on an end portion of the thin-walled tube (1) pushed on and by expanding the tube end section is positively connected to the thin-walled tube (1); and that one on the pipe connection (7) screw-on nut (4) rotatable relative to the ring (3) attached to the tube (1) and is fixed in the axial direction with respect to the ring (3) by stop means. 2. Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die Mutter (4) ein Innengewinde (6) aufweist, und die Anschlagmittel aus einem in Radialrichtung nach innen gerichteten Flanschabschnitt (5) an der Mutter (4) bestehen, der den Ring (3) hintergreift.2. Apparatus according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the nut (4) has an internal thread (6), and the stop means from a flange section (5) on the nut, which is directed inward in the radial direction (4) exist, which engages behind the ring (3). 3. Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß zwischen dem Ring (3) und einer Ausnehmung (8) des Rohrabschlusses (7) ein 0-Ring (9) eingesetzt ist.3. Apparatus according to claim 1, d a d u r c h g e k e n n z e i c h n e t that between the ring (3) and a recess (8) of the pipe end (7) an O-ring (9) is inserted. 4. Vorrichtung nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß der Ring (3) eine gekrümmte Endoberfläche (10) aufweist, welche gegen eine konische Endoberfläche (11) des Rohranschlusses (7) anliegt.4. Apparatus according to claim 1 or 2, d a d u r c h g e k e n n z e i c h n e t that the ring (3) has a curved end surface (10) which rests against a conical end surface (11) of the pipe connection (7). 5. Vorrichtung nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß zwischen dem Ring (3) und dem Rohranschluß (7) ein flaches Dichtungselement (12) angeordnet ist.5. Apparatus according to claim 1 or 2, d a d u r c h g e k e n n z e i c h n e t that between the ring (3) and the pipe connection (7) a flat sealing element (12) is arranged.
DE19782850927 1977-11-25 1978-11-24 Thin walled tube joint - has tube end locked inside internally toothed collar and secured inside threaded fittings Ceased DE2850927A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1977158515U JPS5934782Y2 (en) 1977-11-25 1977-11-25 Connection mechanism of steel pipes and fittings

Publications (1)

Publication Number Publication Date
DE2850927A1 true DE2850927A1 (en) 1979-05-31

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ID=15673414

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782850927 Ceased DE2850927A1 (en) 1977-11-25 1978-11-24 Thin walled tube joint - has tube end locked inside internally toothed collar and secured inside threaded fittings

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JP (1) JPS5934782Y2 (en)
DE (1) DE2850927A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2565318A1 (en) * 1984-05-29 1985-12-06 Hehl Karl SCREW CONNECTION FOR PIPING ELEMENTS
US4674775A (en) * 1985-07-22 1987-06-23 Osaka Gas Company Limited Coupling for corrugated conduit
EP0226933A1 (en) * 1985-12-12 1987-07-01 Communaute Europeenne De L'energie Atomique (Euratom) Tool for tightening and slackening of a pipe joint
EP0439749A1 (en) * 1990-01-29 1991-08-07 Deutsche Aerospace Airbus Gesellschaft mit beschränkter Haftung Threaded joint
DE4310192C2 (en) * 1992-07-28 2001-05-31 Matsushita Electric Works Ltd Quick connection coupling
EP2492567A1 (en) * 2011-02-22 2012-08-29 Siemens Aktiengesellschaft Releaseable joint with coupling nut
WO2013010784A1 (en) * 2011-07-20 2013-01-24 Voss Fluid Gmbh Pipeline comprising a joining end for a pipe connection, method for the production thereof, and pipe connection comprising such a pipeline
EP3851723A4 (en) * 2018-09-12 2022-05-18 Ihara Science Corporation Joining structure, pipe joint, and method for forming joining structure

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60156280U (en) * 1984-03-27 1985-10-17 アイシン精機株式会社 Piping connection joint device
CN111780602B (en) * 2020-07-06 2023-06-30 武汉海华石油化工设备制造有限公司 Heat pipe type heat exchanger

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2565318A1 (en) * 1984-05-29 1985-12-06 Hehl Karl SCREW CONNECTION FOR PIPING ELEMENTS
US4674775A (en) * 1985-07-22 1987-06-23 Osaka Gas Company Limited Coupling for corrugated conduit
GB2178125B (en) * 1985-07-22 1989-07-19 Osaka Gas Co Ltd Coupling for corrugated conduit
EP0226933A1 (en) * 1985-12-12 1987-07-01 Communaute Europeenne De L'energie Atomique (Euratom) Tool for tightening and slackening of a pipe joint
EP0439749A1 (en) * 1990-01-29 1991-08-07 Deutsche Aerospace Airbus Gesellschaft mit beschränkter Haftung Threaded joint
DE4310192C2 (en) * 1992-07-28 2001-05-31 Matsushita Electric Works Ltd Quick connection coupling
EP2492567A1 (en) * 2011-02-22 2012-08-29 Siemens Aktiengesellschaft Releaseable joint with coupling nut
WO2012113639A1 (en) * 2011-02-22 2012-08-30 Siemens Aktiengesellschaft Removable connection having a union nut
WO2013010784A1 (en) * 2011-07-20 2013-01-24 Voss Fluid Gmbh Pipeline comprising a joining end for a pipe connection, method for the production thereof, and pipe connection comprising such a pipeline
EP3851723A4 (en) * 2018-09-12 2022-05-18 Ihara Science Corporation Joining structure, pipe joint, and method for forming joining structure

Also Published As

Publication number Publication date
JPS5934782Y2 (en) 1984-09-26
JPS5483612U (en) 1979-06-13

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