FR2468017A1 - Fluid flow piping elbow - has oval section with or without reducers and straight oval pipe adjacent to elbow - Google Patents
Fluid flow piping elbow - has oval section with or without reducers and straight oval pipe adjacent to elbow Download PDFInfo
- Publication number
- FR2468017A1 FR2468017A1 FR7925865A FR7925865A FR2468017A1 FR 2468017 A1 FR2468017 A1 FR 2468017A1 FR 7925865 A FR7925865 A FR 7925865A FR 7925865 A FR7925865 A FR 7925865A FR 2468017 A1 FR2468017 A1 FR 2468017A1
- Authority
- FR
- France
- Prior art keywords
- section
- elbow
- oval
- cross
- elliptical
- 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.)
- Granted
Links
- 239000003638 chemical reducing agent Substances 0.000 title abstract 3
- 239000012530 fluid Substances 0.000 title description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/02—Influencing flow of fluids in pipes or conduits
- F15D1/04—Arrangements of guide vanes in pipe elbows or duct bends; Construction of pipe conduit elements for elbows with respect to flow, e.g. for reducing losses of flow
-
- 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
- F16L43/00—Bends; Siphons
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pipe Accessories (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
La présente invention concerne l'industrie des tuyauteries de transport de fluide. Elle vi@e plus parti lièrement les coudes nécessaires aux changemen@@ de direction des tuyauter@es. The present invention relates to the fluid transport piping industry. It more particularly lives the elbows necessary for changes in the direction of the pipes.
Lorsqu'on réalise des coudes de tuyauteries, sort par cintrage, soit par éléments juxtaposés, on s'attache générale ment à conserver tout au ong du coude une section droite circulaire constante. When pipe bends are produced, bent out, or by juxtaposed elements, one generally endeavors to keep a constant circular cross section on the elbow.
De @açon surp@@hante, la perte de charge dans de ts plus impo@@ante pour une section droite circulaire qu @e section droite elliptique. De @ açon surp @@ haunts, the pressure drop in ts more impo @@ ante for a circular cross section than @ elliptical cross section.
-invention a nour objet un coude de tuyauterie à faible perte de charge caractérisé en ce qu'au moins sa partie la plus courbe a une section droite en forme d'ellipse dont un des axes est situé dans son plan de courbure
Lorsqu'une tuyauterie comporte plusieurs coudes successifs d'orientation différente, autrement lit dont les plans de courbure sont sécants, il est avantageux que le rapport des deu axes de l'ellipse de chaque coude soit égal ; 0,77 77 ou I 3 pour faciliter les raccordements.-invention has nour a pipe elbow with low pressure drop characterized in that at least its most curved part has a cross section in the shape of an ellipse of which one of the axes is located in its plane of curvature
When a pipe comprises several successive bends of different orientation, otherwise a bed whose planes of curvature are intersecting, it is advantageous that the ratio of the two axes of the ellipse of each bend is equal; 0.77 77 or I 3 to facilitate connections.
I1 est avantageux qu'en dehors des coudes, La tuyaute @e i une section droit circulaire s'aplatissant progress@ve- meni pour devenir elliptique, au moins au milieu de la courbure re L'ai@e de la section droite elliptique la plus aplatie d'un coude suivant l'invention est avantageusement, au moins de préférence, légèrement supérieure à celle de la section droite circulaire des partie: rectilignes de la
L'Anvention est particulièrement intéressante pour la réa@isation de toudes décravant un angle de 90 .Un coude @ui- vant invention peu > comprendre, au moins à l'une de ses @@trémités, ur prolongement rectiligne de section droite elliptique. @ min mum de perte de charge est obtenu dsas n coude suivant 1 invention lorsque la paroi interne du coude est lisse, c'est-à-dire ne fait pas de"ressauts" du@ à un pliage par exemple, au moins dans sa partie située à la corde de la cour@@re. It is advantageous that, apart from the elbows, the pipe @ei a straight circular section flattening progress @ veeni to become elliptical, at least in the middle of the curvature. flattened by an elbow according to the invention is advantageously, at least preferably, slightly greater than that of the circular cross section of the straight parts of the
The invention is particularly interesting for the production of all shapes deviating from an angle of 90. An elbow according to the invention can> comprise, at least in one of its hoppers, a straight extension of elliptical cross section. @ min mum of pressure drop is obtained dsas n elbow according to 1 invention when the internal wall of the elbow is smooth, that is to say does not make "projections" from @ to a bending for example, at least in its part located at the rope of the courtyard @@ re.
On constate que l'avantage de faible perte de charge subsiste avec des prolongements elliptiques en amont du coude, ainsi que lorsque des pièces de raccordement permettant le passage de sections elliptiques aux sections circulaires sont disposées dans la tuyauterie. I1 semblerait que la faible perte de charge constatée dans les coudes suivant l'invention soit due à une diminution de l'influence des tourbillons. It is noted that the advantage of low pressure drop remains with elliptical extensions upstream of the elbow, as well as when connecting pieces allowing the passage of elliptical sections to circular sections are arranged in the piping. It would seem that the low pressure drop observed in the elbows according to the invention is due to a reduction in the influence of the vortices.
L'intérêt du retour d'une section elliptique à une section circulaire pour les conduites rectilignes, est dû au fait que le périmètre d'un cercle est plus petit que le péri- mètre d'une ellipse de même surface, ce qui fait que les frottements sont moindres avec une section droite circulaire qu' avec une section droite elliptique Cependant dans certains cas oh la tuyauterie ne comporte pas de partie rectiligne, comme c'est le cas pour les raccords de turbine, toute la tuyauterie a avantageusement une section droite elliptique continue. The advantage of the return of an elliptical section to a circular section for rectilinear pipes, is due to the fact that the perimeter of a circle is smaller than the perimeter of an ellipse of the same surface, which means that friction is less with a circular cross section than with an elliptical cross section However in some cases where the piping does not have a straight part, as is the case with turbine fittings, all the piping advantageously has a straight section elliptical continuous.
Les coudes suivant l'invention sont surtout intéressants dans leurs applications à des tuyauteries industrielles, autrement dit pour des conduites de grand diamètre, par exemple de 50 mm à plusieurs mètres de diamètre
L'invention sera mieux comprise d la lecture de la descrip- tion détaillée qui va suivre et à l'examen des dessins annexés qui représentent, à titre d'exemples non limitatifs, plusieurs modes de réalisation de l'invention.The bends according to the invention are especially advantageous in their applications to industrial pipes, in other words for pipes of large diameter, for example from 50 mm to several meters in diameter
The invention will be better understood from reading the detailed description which will follow and from examining the appended drawings which represent, by way of nonlimiting examples, several embodiments of the invention.
La figure 1 est un graphique sur lequel est porté en abscisse le rapport b des deux diamètres d'une section el
a liptique d'un coude suivant l'invention, tandis qu'en ordonnée est indiquée la perte de charge correspondante.FIG. 1 is a graph on which the ratio b of the two diameters of a section el is plotted on the abscissa
a liptic of an elbow according to the invention, while on the ordinate is indicated the corresponding pressure drop.
Sur ce diagramme, la partie correspondant à un raccord b inférieur à 1 correspond à un coude de section elliptique a
dans lequel le plus grand diamètre a est situé dans le plan de courbure, tandis que la partie correspondant à un rapport b compris entre 1 et 4 correspond à des coudes dont le a plus petit diamètre a est situé dans le plan de courbure. In this diagram, the part corresponding to a fitting b less than 1 corresponds to an elbow of elliptical section a
in which the largest diameter a is located in the plane of curvature, while the part corresponding to a ratio b between 1 and 4 corresponds to bends whose a smallest diameter a is located in the plane of curvature.
La valeur 1 du rapport b correspond à un coude de section
a droite circulaire classique. A l'examen de cette courbe, on constate que la perte de charge minimum correspond à un rapport b =2 et que pour la valeur b = 1 (section droite circulaire) a a la perte de charge augmente de façon inattendue.The value 1 of the ratio b corresponds to a section bend
right circular classic. Upon examination of this curve, it can be seen that the minimum pressure drop corresponds to a ratio b = 2 and that for the value b = 1 (circular cross-section) aa the pressure drop unexpectedly increases.
Pour les rapports 0,77 + 0,1 et 1,3 t 0,1 situés de part et d'autre de la valeur 1 du rapport b , la perte de charge
a est très voisine, et la permutations des diamètres b et a est facilement réalisable en fabrication. Il est possible de b ~ faire des montages associant un coude de b = 0,7 et un coude de b Ir -
a ,3 en prolongement. For the ratios 0.77 + 0.1 and 1.3 t 0.1 located on either side of the value 1 of the ratio b, the pressure drop
a is very similar, and the permutations of the diameters b and a are easily possible in manufacturing. It is possible to b ~ make assemblies associating an elbow of b = 0.7 and an elbow of b Ir -
a, 3 in extension.
La figure 2 est un diagramme analogue à celui de la figure 1, qui correspond à un coude à 900 comme celui de la figure 1, mais précédé et continué par une partie droite rectiligne de section elliptique, identique à celle du coude. Figure 2 is a diagram similar to that of Figure 1, which corresponds to a bend at 900 like that of Figure 1, but preceded and continued by a straight straight portion of elliptical section, identical to that of the elbow.
Dans l'exemple représenté, les parties rectilignes amont et aval ont les mêmes longueurs et correspondent à environ 5 fois le diamètre de la section circulaire d'entrée et de sortie. In the example shown, the upstream and downstream rectilinear parts have the same lengths and correspond to approximately 5 times the diameter of the circular inlet and outlet section.
La figure 3 représente un diagramme analogue à celui des figures 1 et 2, mais correspond à une tuyauterie comportant un coude à 900, comme dans la figure I, immédiatement précédé et suivi par des pièces de raccordement à la tuyauterie normale de section droite circulaire. FIG. 3 represents a diagram similar to that of FIGS. 1 and 2, but corresponds to a piping comprising a bend at 900, as in FIG. I, immediately preceded and followed by connecting pieces to the normal piping of circular cross section.
On remarquera sur les figures 2 et 3 qui correspondent le plus aux réalisations pratiques, que la perte de charge est pratiquement identique pour les rapports de ba de 0,77 et 1,3. It will be noted in FIGS. 2 and 3 which correspond most closely to the practical embodiments, that the pressure drop is practically identical for the ratios of ba of 0.77 and 1.3.
Bien entendu, l'invention n'est nullement limitée aux modes de réalisation décrits et représentés, elle est susceptible de nombreuses variantes accessibles à l'homme de l'art, suivant les applications envisagées et sans s'écarter pour cela du cadre de l'invention. Of course, the invention is in no way limited to the embodiments described and shown, it is capable of numerous variants accessible to those skilled in the art, depending on the applications envisaged and without departing from the scope of the invention. 'invention.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7925865A FR2468017A1 (en) | 1979-10-18 | 1979-10-18 | Fluid flow piping elbow - has oval section with or without reducers and straight oval pipe adjacent to elbow |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7925865A FR2468017A1 (en) | 1979-10-18 | 1979-10-18 | Fluid flow piping elbow - has oval section with or without reducers and straight oval pipe adjacent to elbow |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2468017A1 true FR2468017A1 (en) | 1981-04-30 |
FR2468017B1 FR2468017B1 (en) | 1983-04-29 |
Family
ID=9230790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7925865A Granted FR2468017A1 (en) | 1979-10-18 | 1979-10-18 | Fluid flow piping elbow - has oval section with or without reducers and straight oval pipe adjacent to elbow |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2468017A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000032923A1 (en) * | 1998-12-03 | 2000-06-08 | Filterwerk Mann+Hummel Gmbh | Pipe bend |
WO2006033602A1 (en) * | 2004-09-21 | 2006-03-30 | Volvo Lastvagnar Ab | Pipe line for a turbocharger system for an internal combustion engine |
US20140190164A1 (en) * | 2013-01-07 | 2014-07-10 | General Electric Company | High pressure turbine inlet duct and engine |
EP3529538B1 (en) | 2016-10-19 | 2020-12-02 | Wilhelm Bruckbauer | Curved element for a ventilation system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE598919C (en) * | 1934-06-21 | Wilhelm Hamacher | Right-angled elbow for pressure medium lines | |
DE961933C (en) * | 1952-09-11 | 1957-04-11 | Phoenix Rheinrohr Ag Vereinigt | Weld-in elbow with pipe cross-section deviating from the circular shape for piping systems with high elasticity |
-
1979
- 1979-10-18 FR FR7925865A patent/FR2468017A1/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE598919C (en) * | 1934-06-21 | Wilhelm Hamacher | Right-angled elbow for pressure medium lines | |
DE961933C (en) * | 1952-09-11 | 1957-04-11 | Phoenix Rheinrohr Ag Vereinigt | Weld-in elbow with pipe cross-section deviating from the circular shape for piping systems with high elasticity |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000032923A1 (en) * | 1998-12-03 | 2000-06-08 | Filterwerk Mann+Hummel Gmbh | Pipe bend |
WO2006033602A1 (en) * | 2004-09-21 | 2006-03-30 | Volvo Lastvagnar Ab | Pipe line for a turbocharger system for an internal combustion engine |
US20140190164A1 (en) * | 2013-01-07 | 2014-07-10 | General Electric Company | High pressure turbine inlet duct and engine |
US9228488B2 (en) * | 2013-01-07 | 2016-01-05 | General Electric Company | High pressure turbine inlet duct and engine |
EP3529538B1 (en) | 2016-10-19 | 2020-12-02 | Wilhelm Bruckbauer | Curved element for a ventilation system |
Also Published As
Publication number | Publication date |
---|---|
FR2468017B1 (en) | 1983-04-29 |
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ST | Notification of lapse |