DE852629C - Corrugated pipe and folded pipe bend - Google Patents
Corrugated pipe and folded pipe bendInfo
- Publication number
- DE852629C DE852629C DES8480D DES0008480D DE852629C DE 852629 C DE852629 C DE 852629C DE S8480 D DES8480 D DE S8480D DE S0008480 D DES0008480 D DE S0008480D DE 852629 C DE852629 C DE 852629C
- Authority
- DE
- Germany
- Prior art keywords
- pipe
- folded
- bend
- corrugated
- corrugated pipe
- 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
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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/04—Expansion-compensation arrangements for pipe-lines making use of bends, e.g. lyre-shaped
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
Zur Aufnahme der Längenänderungen bei der Erwärmung von Rohrleitungen werden Glattrohr-, Faltenrohr und Wellrohrbogen verwendet. Faltenrohr- und Wellrohrbogen haben den Vorteil, daß sie vermöge ihrer größeren Federung in den Ausmaßen kleiner gehalten werden können als der Glattrohrbogen.To accommodate changes in length when pipelines are heated Smooth pipe, folded pipe and corrugated pipe bends are used. Folded pipe and corrugated pipe bends have the advantage that they are smaller in size because of their greater suspension can be held as the smooth tube bend.
Es hat sich gezeigt, daß eine gleichmäßige Kreiskrümmung der Rohre ungünstig ist, weil bei ihr im Scheitel des Rohrbogens unerwünschte Spannungsspitzen auftreten. Bei Glattrohrbogen hat man die Spannungsverteilung durch Einfügen eines geradlinigen Teiles im Scheitel oder durch annähernd elliptische Gestaltung des Bogens verbessert.It has been shown that a uniform circular curvature of the tubes is unfavorable because it has undesirable stress peaks in the apex of the pipe bend appear. In the case of smooth pipe bends, you have the stress distribution by inserting a rectilinear part in the apex or by an approximately elliptical design of the Bow improved.
Nach der Erfindlung werden die obengenannten Vorteile des Faltenrohrbogens beibehalten und dessen Spannungszustand gegenüber den bekannten Ausführungen bei gleicher Ausladung erheblich verbessert. Dies geschieht dadurch, daß an dem gebogenen Teil jede Falte desto höher ist, je kleiner das an der Stelle der Falte auf das Rohr als Ganzes wirkende Biegungsmoment ist. Diese Verschiedenheit der Faltenhöhe kann man durch eine entsprechende Abstufung der Biegeradien erreichen. Die Faltenhöhen können dabei so bemessen werden, daß in allen Teilen des gesamten Bogens eine annähernd gleiche Spannung auftritt, wenn das Rohr betriebsmäßig belastet wird. So hat sich gezeigt, daß sich der Spannungszustand am günstigsten ausbildet, wenn die Falten sinusartig verlaufen.According to the invention, the above-mentioned advantages of the folded pipe bend retained and its state of tension compared to the known designs significantly improved with the same overhang. This is done by the fact that on the curved The higher the part of each crease, the smaller that is at the point of the crease on that The bending moment acting on the pipe as a whole. This difference in the height of the folds can be achieved by grading the bending radii accordingly. The fold heights can be dimensioned so that in all parts of the entire arch an approximately same voltage occurs when the pipe is operationally loaded. So did shown that the state of tension is most favorable when the folds are sinusoidal.
Die Zeichnung zeigt als ein Ausführungsbeispiel der Erfindung ein Debnungsglied zum Einschalten in eine Rohrleitung, die veränderlichen Wärmedehnungen oder mechanischen Streckungen ausgesetzt ist. Das Dehnungsglied ist in der üblichen Weise doppelt S-förmig gebogen.The drawing shows an exemplary embodiment of the invention Deboning element for switching on in a pipeline, the variable thermal expansions or mechanical stretching. The dilator is in the usual Way bent double S-shape.
Fig. I zeigt das Dehnungsglied und Fig. 2 schematisch die auftretenden Biegungsmomente. An den Stellen I, 2 und 3 des Rohrbogens treten nach Fig. 2 Möhstwerte 4 und 5 der Biegungsmomente auf. Die Falten des Rohres sind deshalb bei 6 und 7 am flachsten und bei 8 und 9 am höchsten. Wie aus den eingezeichneten Krümmungsradien Io zu erkennen ist, ändern sich diese beständig von dem Höchstwert i i an den Stellen 1, 2 und 3 bis zum kleinsten Wert 12 an den Stellen 8 und 9.Fig. I shows the expansion member and Fig. 2 shows schematically the occurring Bending moments. At points I, 2 and 3 of the pipe bend, as shown in FIG. 2, possible values occur 4 and 5 of the bending moments. The folds of the tube are therefore at 6 and 7 flattest and highest at 8 and 9. As from the drawn radii of curvature Io can be seen, these change constantly from the maximum value i i at the points 1, 2 and 3 down to the smallest value 12 in places 8 and 9.
Selbstverständlich können auch Wellrohrbogen nach der Erfindung ebenso gestaltet werden, wie oben für Faltenrohrbogen beschrieben.Of course, corrugated pipe bends according to the invention can also be used be designed as described above for corrugated pipe bends.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES8480D DE852629C (en) | 1942-01-20 | 1942-01-20 | Corrugated pipe and folded pipe bend |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES8480D DE852629C (en) | 1942-01-20 | 1942-01-20 | Corrugated pipe and folded pipe bend |
Publications (1)
Publication Number | Publication Date |
---|---|
DE852629C true DE852629C (en) | 1952-10-16 |
Family
ID=7472771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES8480D Expired DE852629C (en) | 1942-01-20 | 1942-01-20 | Corrugated pipe and folded pipe bend |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE852629C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5142895A (en) * | 1989-05-15 | 1992-09-01 | Amana Refrigeration, Inc. | Method for bending tubes |
DE102004060883A1 (en) * | 2004-12-17 | 2006-07-13 | Heinz Wolf | Swivel system for hydraulic lines in articulated lorries comprises connector block, into which feed line and drain line fit, block being mounted on pin which acts as pivot |
-
1942
- 1942-01-20 DE DES8480D patent/DE852629C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5142895A (en) * | 1989-05-15 | 1992-09-01 | Amana Refrigeration, Inc. | Method for bending tubes |
DE102004060883A1 (en) * | 2004-12-17 | 2006-07-13 | Heinz Wolf | Swivel system for hydraulic lines in articulated lorries comprises connector block, into which feed line and drain line fit, block being mounted on pin which acts as pivot |
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