CH571678A5 - Pipe or hose union - has clamping ring distorted into truncated cone on pulling up - Google Patents
Pipe or hose union - has clamping ring distorted into truncated cone on pulling upInfo
- Publication number
- CH571678A5 CH571678A5 CH1226474A CH1226474A CH571678A5 CH 571678 A5 CH571678 A5 CH 571678A5 CH 1226474 A CH1226474 A CH 1226474A CH 1226474 A CH1226474 A CH 1226474A CH 571678 A5 CH571678 A5 CH 571678A5
- Authority
- CH
- Switzerland
- Prior art keywords
- pipe
- clamping ring
- union
- hose
- wall
- Prior art date
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
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/22—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts
- F16L33/223—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts the sealing surfaces being pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L33/224—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts the sealing surfaces being pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts a clamping ring being arranged between the threaded member and the connecting member
-
- 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
- F16L17/00—Joints with packing adapted to sealing by fluid pressure
- F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
- F16L17/03—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips
- F16L17/035—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips the sealing rings having two lips parallel 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
- 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
-
- 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
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/16—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with sealing or securing means using fluid pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The union has a clamping device and a seal to resist tension loads and form a watertight joint. The devive comprises a union nut (1) screwing onto an external thread on the union body (2) and a clamping ring (4) of symmetrical cross-section between nut and body. As the nut is tightenend down the ring is pressed against the wall of pipe or hose (3) in such a manner that its manner wall assumes a truncated-cone shape, with the narrowest portion furthest from the hose or pipe end. The seal (8) is of U-, V- or T-section, and accommodated inside a recess formed in the union body. compared with existing designs the advantage is that it is easily sealed when the union has been pulled up tight enough.
Description
Die Erfindung betrifft eine Kupplung für Rohre oder Schläuche. Die Kupplung dient dazu, Rohre oder Schläuche unter sich oder mit Metallrohren zugfest und wasserdicht zu verbinden.
Die bestehenden Kupplungen haben Klemmringe und Dichtringe, welche parallel gegen die Rohraussenwand gedrückt werden. Ein solcher Klemmring hat einen unsymmetrischen Querschnitt und wird durch Anziehen einer Über- wurfmutter am Kupplungskörper etwas über die Rohroberfläche nach vorne geschoben. Der verwendete Dichtungsring wird beim Anbringen der Kupplung an einem Rohr zusätzlich gequetscht.
Die Zugfestigkeit der Klemmverbindung der auf dem Markt befindlichen Kupplungen hängt bei einem zum Andrücken parallel gegen die Rohrwand bestimmten Klemmring stark von dem jeweiligen Zustand und der Beschaffenheit der Rohroberfläche und der aufliegenden Seiten des Klemmringes ab. Das heisst vom Reibungswiderstand, so dass eine sichere Zugverbindung nicht immer erhalten wird. Im weiteren entsteht dadurch, dass der Klemmring beim Anziehen zuerst über das Rohr geschoben wird und erst dann auf die Rohroberfläche eindrückt vielfach das Gefühl, die Kupplung sei schon fest angezogen, wenn der eigentliche Anpressvorgang noch gar nicht begonnen hat. Werden auf der Baustelle die Kupplungen auseinandergenommen, so geschieht es leicht, dass die ungleichen oder nicht symmetrischen Teile falsch zu sammengesetzt werden, was immer wieder zu Undichtigkeiten und ungenügender Klemmung führt.
Der Erfindung liegt die Aufgabe zugrunde, sowohl die Sicherheit der Zugverbindung wie auch die Sicherheit der Dichtung einer Rohr- oder Schlauchkupplung zu erhöhen.
Erfindungsgemäss wird eine höhere Sicherheit der Zugverbindung dadurch erreicht, dass der Klemmring beim Anziehen der Überwurfmutter sofort gegen das Rohr gedrückt wird und durch das Anziehen des Klemmringes die Form des Mantels eines Kegelstumpfes erhält. Der Querschnitt des Klemmringes ist zur Vermeidung eines falschen Einlegens symmetrisch. Die Dichtung wird durch ein Dichtungselement mit rundem, U- oder V-förmigem Querschnitt erreicht.
Ein Ausführungsbeispiel der Kupplung nach der Erfindung zeigt die beiliegende Zeichnung, wobei die obere Abbildung die Kupplung in losem Zustand, die untere Abbildung die Kupplung in angezogenem Zustand zeigt.
Die Kupplung ist wie folgt konstruiert: Die Überwurfmutter 1 greift mit dem Innengewinde der Verlängerung in ein Aussengewinde des Körpers 2. Zwischen der Überwurf- mutter, dem Körper sowie dem Rohr oder Schlauch 3 liegt ein Klemmring 4, welcher sowohl gegen den Körper wie auch gegen die Überwurfmutter eine gleiche Schrägfläche 5 hat, so dass es keine Rolle spielt, wie der Ring eingelegt wird. Der Klemmring kann gegen das Rohr oder den Schlauch kantige Erhöhungen aufweisen. Beim Anziehen der Überwurfmutter wird nun das an der Überwurfmutter liegende Ende 6 des Klemmringes gegen das Rohr gedrückt, wobei sein Durchmesser verkleinert wird. Damit der Durchmesser verkleinert werden kann, ist am Umfang des Klemmringes ein kleines Stück 7 ausgeschnitten. Das am Körper liegende Ende des Klemmringes bleibt unverändert.
Dadurch wird die Form des Klemmringes wie ein Mantel eines Kegelstumpfes. Ringsum an der Rohrwandung ergibt sich dadurch eine keilförmige Einengung, welche verhindert, dass das Rohr aus der Kupplung gezogen werden oder gleiten kann. Zur Abdichtung der Kupplung wird in einer Vertiefung des Körpers ein Dichtring mit einem U- oder V-förmigen Querschnitt 8 fest eingelegt, wobei die Öffnung gegen das Rohr- oder Schlauchende gerichtet ist. Wird nun das Medium im Rohrinnern unter Druck gesetzt und versucht zwischen der Rohraussenwand und der Kupplung hinauszuströmen, so stösst es in die Öffnung der U- oder V-förmigen Dichtung. Durch diesen Pressdruck wird der eine Lappen der Dichtung gegen den Kupplungskörper, der andere gegen die Rohraussenwand gepresst. Dadurch ist immer eine einwandfreie Dichtung gewährleistet.
Durch den, in angezogenem Zustand, die Form eines Mantels eines Kegelstumpfes aufweisenden Klemmring ist ein Ausgleiten oder Ausziehen des Rohres aus der Kupplung nicht möglich. Dadurch, dass der Klemmring sofort gegen die Rohnvandung gedrückt wird und nicht erst ein Stück über das Rohr gleitet, ist die Gefahr, dass frühzeitig mit dem Anziehen der Überwurfmutter aufgehört wird, nicht mehr gegeben, so dass immer eine zugfeste Klemmverbindung entsteht.
Durch die symmetrische Form des Klemmringquerschnittes kann es nicht mehr vorkommen, dass eine auseinandergenommene Kupplung falsch zusammengesetzt wird, so dass dadurch schlechte Klemmungen oder Undichtigkeiten ausgeschlossen werden. Durch den U- oder V-förmigen Querschnitt des Dichtungselementes ist ein Undichtwerden der Kupplung selbst beim schlecht masshaltigen oder an der Oberfläche verletzten oder eingebuchteten Rohre nicht mehr möglich, da durch den Pressdruck des Mediums der Lappen des Dichtringes so weit nach innen gedrückt wird, bis er einwandfrei aufliegt.
The invention relates to a coupling for pipes or hoses. The coupling is used to connect pipes or hoses to one another or to metal pipes in a tensile and watertight manner.
The existing couplings have clamping rings and sealing rings, which are pressed parallel against the pipe outer wall. Such a clamping ring has an asymmetrical cross-section and is pushed forward slightly over the pipe surface by tightening a union nut on the coupling body. The sealing ring used is also squeezed when the coupling is attached to a pipe.
The tensile strength of the clamping connection of the couplings available on the market depends strongly on the respective condition and the nature of the pipe surface and the sides of the clamping ring resting on a clamping ring intended to be pressed parallel against the pipe wall. That means from the frictional resistance, so that a safe train connection is not always obtained. In addition, the fact that the clamping ring is first pushed over the pipe when it is tightened and only then presses onto the pipe surface often gives the feeling that the coupling is already firmly tightened when the actual pressing process has not yet started. If the couplings are dismantled on the construction site, it can easily happen that the unequal or non-symmetrical parts are put together incorrectly, which repeatedly leads to leaks and insufficient clamping.
The invention is based on the object of increasing both the safety of the connection and the safety of the seal of a pipe or hose coupling.
According to the invention, greater safety of the connection is achieved in that the clamping ring is immediately pressed against the pipe when the union nut is tightened, and by tightening the clamping ring it takes on the shape of the shell of a truncated cone. The cross-section of the clamping ring is symmetrical to avoid incorrect insertion. The seal is achieved by a sealing element with a round, U- or V-shaped cross-section.
An embodiment of the coupling according to the invention is shown in the accompanying drawing, the upper figure showing the coupling in the loose state, the lower figure showing the coupling in the tightened state.
The coupling is constructed as follows: The union nut 1 engages with the internal thread of the extension in an external thread of the body 2. Between the union nut, the body and the pipe or hose 3 there is a clamping ring 4, which both against the body and against the union nut has the same inclined surface 5, so that it does not matter how the ring is inserted. The clamping ring can have edged elevations against the pipe or the hose. When the union nut is tightened, the end 6 of the clamping ring lying on the union nut is now pressed against the pipe, its diameter being reduced. So that the diameter can be reduced, a small piece 7 is cut out on the circumference of the clamping ring. The end of the clamping ring lying on the body remains unchanged.
This makes the shape of the clamping ring like the jacket of a truncated cone. This results in a wedge-shaped constriction all around the pipe wall, which prevents the pipe from being pulled out of the coupling or from sliding. To seal the coupling, a sealing ring with a U-shaped or V-shaped cross-section 8 is firmly inserted in a recess in the body, the opening being directed towards the end of the pipe or hose. If the medium inside the pipe is pressurized and tries to flow out between the pipe outer wall and the coupling, it pushes into the opening of the U- or V-shaped seal. This pressing pressure presses one tab of the seal against the coupling body and the other against the pipe outer wall. This always ensures a perfect seal.
As a result of the clamping ring, which, in the tightened state, has the shape of a jacket of a truncated cone, it is not possible for the pipe to slide out or be pulled out of the coupling. Because the clamping ring is immediately pressed against the wall of the pipe and does not first slide a little over the pipe, there is no longer any risk of the union nut being tightened prematurely, so that there is always a tension-proof clamping connection.
Due to the symmetrical shape of the clamping ring cross-section, it can no longer happen that a dismantled coupling is put together incorrectly, so that bad clamping or leaks are excluded. Due to the U- or V-shaped cross-section of the sealing element, leakage of the coupling is no longer possible, even with pipes that are poorly dimensionally stable or with damaged or indented surfaces, as the pressure of the medium pushes the flap of the sealing ring inward until it rests properly.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1226474A CH571678A5 (en) | 1974-09-09 | 1974-09-09 | Pipe or hose union - has clamping ring distorted into truncated cone on pulling up |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1226474A CH571678A5 (en) | 1974-09-09 | 1974-09-09 | Pipe or hose union - has clamping ring distorted into truncated cone on pulling up |
Publications (1)
Publication Number | Publication Date |
---|---|
CH571678A5 true CH571678A5 (en) | 1976-01-15 |
Family
ID=4381392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1226474A CH571678A5 (en) | 1974-09-09 | 1974-09-09 | Pipe or hose union - has clamping ring distorted into truncated cone on pulling up |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH571678A5 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0073050A1 (en) * | 1981-08-25 | 1983-03-02 | Georg Fischer Aktiengesellschaft | Clamping connections for even circular bodies, especially pipes and rods |
WO2004001269A1 (en) * | 2002-06-20 | 2003-12-31 | Nkt Flexibles I/S | Flexible pipe structure connected to an end fitting comprising a self-sealing annular sealing gasket |
WO2013058358A1 (en) * | 2011-10-20 | 2013-04-25 | 株式会社トヨックス | Pipe joint |
JP2018155268A (en) * | 2017-03-15 | 2018-10-04 | 株式会社ブリヂストン | Pipe joint |
-
1974
- 1974-09-09 CH CH1226474A patent/CH571678A5/en not_active IP Right Cessation
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0073050A1 (en) * | 1981-08-25 | 1983-03-02 | Georg Fischer Aktiengesellschaft | Clamping connections for even circular bodies, especially pipes and rods |
WO2004001269A1 (en) * | 2002-06-20 | 2003-12-31 | Nkt Flexibles I/S | Flexible pipe structure connected to an end fitting comprising a self-sealing annular sealing gasket |
WO2013058358A1 (en) * | 2011-10-20 | 2013-04-25 | 株式会社トヨックス | Pipe joint |
CN103917816A (en) * | 2011-10-20 | 2014-07-09 | 东洋克斯株式会社 | Pipe joint |
JP5557221B2 (en) * | 2011-10-20 | 2014-07-23 | 株式会社トヨックス | Pipe fitting |
CN103917816B (en) * | 2011-10-20 | 2016-01-20 | 东洋克斯株式会社 | Tube connector |
JP2018155268A (en) * | 2017-03-15 | 2018-10-04 | 株式会社ブリヂストン | Pipe joint |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |