DE9017989U1 - Press fitting for creating a permanent connection between thin-walled pipes - Google Patents
Press fitting for creating a permanent connection between thin-walled pipesInfo
- Publication number
- DE9017989U1 DE9017989U1 DE9017989U DE9017989U DE9017989U1 DE 9017989 U1 DE9017989 U1 DE 9017989U1 DE 9017989 U DE9017989 U DE 9017989U DE 9017989 U DE9017989 U DE 9017989U DE 9017989 U1 DE9017989 U1 DE 9017989U1
- Authority
- DE
- Germany
- Prior art keywords
- press fitting
- fitting
- thin
- pipes
- permanent connection
- 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.)
- Expired - Lifetime
Links
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 6
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000013535 sea water Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
- F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars
- F16L13/161—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars the pipe or collar being deformed by crimping or rolling
-
- 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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
- F16L13/141—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside
- F16L13/142—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside with a sealing element inserted into the female part before crimping or rolling
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Description
Mannesmann Aktiengesellschaft -G&T-ftugu-st-4999-Mannesmann Aktiengesellschaft -G&T-ftugu-st-4999-
Mannesmannufer 2 26 955 Ku/MaMannesmannufer 2 26 955 Ku/Ma
4000 Düsseldorf4000 Dusseldorf
Preßfitting zur Herstellung einer unlösbaren Verbindung von dünnwandigen RohrenPress fitting for creating a permanent connection between thin-walled pipes
Beim Transport von aggressiven Wässern, insbesondere Seewasser und Brauchwasser aller Art werden durch die Wasserinhaltsstoffe wie z. B. Chloride hinsichtlich der Korrosionsbeständigkeit hohe Anforderungen an die wasserführenden Leitungen gestellt. Zur Überwindung dieses Problems werden oftmals nichtrostende Stähle eingesetzt (EP 0 198 789 A2), die aber trotz hoher Legierungsgehalte Anwendungsgrenzen haben. Überschreiden die Chloridgehalte der Wasser bestimmte Werte, dann versagen auch hochlegierte nichtrostende Stähle.When transporting aggressive water, especially sea water and all types of industrial water, the substances contained in the water, such as chlorides, place high demands on the corrosion resistance of the water pipes. To overcome this problem, stainless steels are often used (EP 0 198 789 A2), but despite their high alloy content, they have application limits. If the chloride content of the water exceeds certain values, even high-alloyed stainless steels fail.
Eine Problemlösung für den Transport oben genannter Wasser ist der Einsatz einer Kupfer-Nickel-Knetlegierung, die im hohen Maße korrosionsbeständig ist. Zur Lösung der Korrosionsprobleme im Bereich z. B. der Meerwaser- oder Brauchwassertechnik ist es zwar bekannt (DE-OS 58 647) verschiedene Kupfer-Nickel-Knetlegierungen zu verwenden, die notwendige Verbindungstechnik mittels Schutzgasschweißen stellt aber eine hochspezialisierte und sehr aufwendige Technik dar und erfordertOne solution to the problem of transporting the above-mentioned water is the use of a copper-nickel wrought alloy, which is highly corrosion-resistant. To solve corrosion problems in the area of seawater or industrial water technology, for example, it is known (DE-OS 58 647) to use various copper-nickel wrought alloys, but the necessary joining technology using inert gas welding is a highly specialized and very complex technique and requires
2 -06 ;08-rl999-2 -06 ;08-rl999-
dementsprechend ausgebildetes Fachpersonal. Trotzdem kommt es immer wieder zu Porenbildungen, die nach kurzer Zeit zu Leckagen im Rohrsystem führen.appropriately trained specialists. Nevertheless, pores still form again and again, which after a short time leads to leaks in the pipe system.
Aufgabe der Erfindung ist es, einen Preßfitting anzugeben, mit dem. in einfacher, sicherer und kostengünstiger Weise dünnwandige Rohre aus einer Kupfer-Nickel-Knetlegierung miteinander verbunden werden können.The object of the invention is to provide a press fitting with which thin-walled pipes made of a wrought copper-nickel alloy can be connected to one another in a simple, safe and cost-effective manner.
Diese Aufgabe Wird durch einen Preßfitting gemäG dem Hauptanspruch gelöst.This task is solved by a press fitting according to the main claim.
Der Vorteil dieser Verbindungstechnik liegt darin, daß damit die Anwendung der Kupfer-Nickel-Knetlegierung für weite Bereiche der Installationstechnik und des Apparatebaues mit besonderer Anforderung an die Korrosionsbeständigkeit unter wirtschaftlichen Gesichtspunkten möglich wird. Außerdem wird die Verwendung dieses Werkstoffes mittels der vorgeschlagenen Verbindungstechnik von Fachinstallationsbetrieben bzw. Kleinfirmen ohne speziell ausgebildetes Schweißfachpersonal beherrschbar. Ein weiterer Vorteil dieser Verbindungstechnik liegt darin, daß durch die kalte Verpressung im Gegensatz zum Schweißen keine Brandgefährdung auftritt und eine Nachkontrolle der Verbindung entfallen kann, da durch das automatisch arbeitende Preßwerkzeug in jedem Fall eine dichte Verbindung gewährleistet ist.The advantage of this connection technique is that it makes it possible to use the copper-nickel wrought alloy for a wide range of installation technology and equipment construction with special requirements for corrosion resistance from an economic point of view. In addition, the use of this material can be managed by specialist installation companies or small companies without specially trained welding personnel using the proposed connection technique. A further advantage of this connection technique is that, unlike welding, cold pressing does not pose a fire hazard and there is no need for follow-up inspections of the connection, since the automatic pressing tool always guarantees a tight connection.
Damit auch höhere in Axialrichtung wirkende Kräfte sicher aufgenommen werden können, wird weiterbildend vorgeschlagen, zusätzlich zu der in den einen Dichtring enthaltenden Fittingsbereich auch an anderen Stellen eine Verpressung vorzunehmen, um damit die mechanische Verklammerung zu verbessern.In order to be able to safely absorb even higher forces acting in the axial direction, it is proposed to carry out pressing in other places in addition to the fitting area containing a sealing ring in order to improve the mechanical clamping.
3 &Oacgr;&70&&Ggr;19903 &Oacgr;&70&&Ggr;1990
In der Zeichnung Wird der Preßfittinq näher erläutert.The press fit is explained in more detail in the drawing.
Es zeigen:Show it:
Figur 1 einen Teillängsschnitt durch eine Preßfittingverbindung mit noch angesetztem PreßwerkzeugFigure 1 shows a partial longitudinal section through a press fitting connection with the pressing tool still attached
Figur 2 einen Schnitt entlang der Linie A-A in Figur 1Figure 2 shows a section along the line A-A in Figure 1
In Figur 1 ist ein Teillängsschnitt durch eine Preßfittingverbindung mit noch angesetztem Preßwerkzeug dargestellt. Das aus einer Kupfer-Nickel-Knetlegierung, z. B. CuNiIOFeIMn hergestellte Rohr 1 wird mit seinem Ende bis zum Anschlag 2 des Preßfittings 3 hineingeschoben. Der Preßfitting 3 weist je ein sickenförmiges Ende 4 auf, in dessen Hohlraum der Runddichtring 5 aus Butylkautschuk angeordnet ist. Die beiden Backen 6,7 des hier nicht dargestellten Preßwerkzeuges umfassen das sickenförmige Ende 4 des Preßfittings 3 und durch hydraulisch oder elektromechanisch aufgebrachten Druck werden die beiden Backen 6,7 geschlossen und der Preßfitting 3 mit dem Rohr 1 form- und kraftschlüssig miteinander verbunden. Die Verringerung des Innendurchmessers 8 des Rohres 1 im Bereich der Verpressung wird bewußt angestrebt, um die mechanische Verklammerung zu verbessern. Dadurch steigt der Widerstand gegen die auftretenden Längskräfte, die versuchen, das Rohr 1 aus dem Preßfitting 3 herauszudrücken.Figure 1 shows a partial longitudinal section through a press fitting connection with the pressing tool still attached. The pipe 1, made from a copper-nickel wrought alloy, e.g. CuNiIOFeIMn, is pushed in with its end up to the stop 2 of the press fitting 3. The press fitting 3 has a bead-shaped end 4, in the cavity of which the round sealing ring 5 made of butyl rubber is arranged. The two jaws 6, 7 of the pressing tool (not shown here) enclose the bead-shaped end 4 of the press fitting 3 and the two jaws 6, 7 are closed by hydraulically or electromechanically applied pressure and the press fitting 3 is connected to the pipe 1 in a form-fitting and force-fitting manner. The reduction of the inner diameter 8 of the pipe 1 in the area of the pressing is deliberately aimed at improving the mechanical clamping. This increases the resistance to the longitudinal forces that attempt to push the pipe 1 out of the press fitting 3.
Bei der Verpressung wird der Durchmesser des sickenförmigen Endes 4 des Preßfittings 3 verringert und der Hohlraum in der Sick verkleinert, so daß der eingeschlossene Runddichtring 5 elastisch verformt und damit die Dichtwirkung erzielt wird.During pressing, the diameter of the bead-shaped end 4 of the press fitting 3 is reduced and the cavity in the bead is reduced so that the enclosed round sealing ring 5 is elastically deformed and thus the sealing effect is achieved.
4 06.08.19904 06.08.1990
Figur 2 zeigt einen Schnitt entlang der Linie A-A in Figur 1. In diesem Querschnitt ist die form- und kraftschlüssige Verklammerung des Preßfittings 3 mit dem Rohr 1 gut zu erkennen. Die beiden Backen 6,7 des nicht dargestellten Preßwerkzeuges sind voll zugefahren und bedingt durch die Form der Backen 6,7 entsteht in etwa eine sechseckige Querschnittskonfiguration der Verbindung. Der kl ine Hohlraum 8,9 in der Teilungsebene der beiden Backen 6,7 ist erforderlich, damit überschüssiges Material bei der Verpressung abfließen kann.Figure 2 shows a section along the line A-A in Figure 1. In this cross-section, the positive and non-positive clamping of the press fitting 3 with the pipe 1 can be clearly seen. The two jaws 6,7 of the pressing tool (not shown) are fully closed and, due to the shape of the jaws 6,7, the cross-sectional configuration of the connection is approximately hexagonal. The small cavity 8,9 in the dividing plane of the two jaws 6,7 is required so that excess material can flow away during pressing.
Claims (2)
dadurch gekennzeichnet,2. Press fitting according to claim 1,
characterized,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9017989U DE9017989U1 (en) | 1990-08-07 | 1990-08-07 | Press fitting for creating a permanent connection between thin-walled pipes |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9017989U DE9017989U1 (en) | 1990-08-07 | 1990-08-07 | Press fitting for creating a permanent connection between thin-walled pipes |
| DE19904025317 DE4025317A1 (en) | 1990-08-07 | 1990-08-07 | USE OF A PRESS FITTING TO MAKE AN UNLOADABLE CONNECTION OF THIN-WALLED TUBES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE9017989U1 true DE9017989U1 (en) | 1993-08-12 |
Family
ID=25895797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE9017989U Expired - Lifetime DE9017989U1 (en) | 1990-08-07 | 1990-08-07 | Press fitting for creating a permanent connection between thin-walled pipes |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE9017989U1 (en) |
-
1990
- 1990-08-07 DE DE9017989U patent/DE9017989U1/en not_active Expired - Lifetime
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