EP0082775A2 - Cowl for gaseous fluid - Google Patents

Cowl for gaseous fluid Download PDF

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Publication number
EP0082775A2
EP0082775A2 EP82402313A EP82402313A EP0082775A2 EP 0082775 A2 EP0082775 A2 EP 0082775A2 EP 82402313 A EP82402313 A EP 82402313A EP 82402313 A EP82402313 A EP 82402313A EP 0082775 A2 EP0082775 A2 EP 0082775A2
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EP
European Patent Office
Prior art keywords
vacuum cleaner
diameter
static vacuum
cleaner according
outlet orifice
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EP82402313A
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German (de)
French (fr)
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EP0082775B1 (en
EP0082775A3 (en
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André Amphoux
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/08—Tops for chimneys or ventilating shafts; Terminals for flues with coaxial cones or louvres

Definitions

  • the present invention relates to an improved static gaseous fluid vacuum cleaner, in particular for exhaust gases or fumes from a chimney or any outlet with a substantially vertical axis.
  • Vacuum cleaners are already known which consist of a lower element and an upper element, hollow, circular, superimposed, coaxial, rigidly fixed to one another, at a certain distance from each other.
  • the lower element of the vacuum cleaner comprises a lower bottom and a lower cap, of generally frustoconical shape, associated with each other, rigidly fixed with each other by their large common base and crossed coaxially by a pipe which is integral with them and which opens into the space between the two lower and upper elements through an outlet for gaseous fluids.
  • the upper element consists of an upper bottom and an upper cap, each of them having a general cone shape, rigidly fixed to each other by their large common base.
  • These static vacuum cleaners first serve to facilitate the elimination of gaseous fluids from the outlet opening of the conduit extending the chimney-above which this device is intended to be mounted.
  • these static vacuums use the suction effect of a Venturi tube.
  • the pipe through which the gaseous fluids arrive opens into the space between the two upper and lower elements of the vacuum cleaner.
  • the wind, in the space between these lower and upper elements has an air flow similar to that of a Venturi tube, the gaseous fluids being drawn from the outlet of these fluids.
  • vacuum cleaners are not designed to obtain a fixed nominal flow rate of gaseous fluids discharged, whatever the wind speed.
  • the invention aims to overcome these drawbacks.
  • a static vacuum cleaner of the type defined above characterized in that it comprises means making it possible to ensure a free passage of the fluid to be evacuated between the lower element and the upper element at least equal to the section of the outlet of the pipe through which the gaseous fluids to be discharged arrive; means allowing the protection of the outlet orifice of the conduit against rain and means making it possible to increase the height of the final depression area relative to the height of the initial depression area.
  • the means for ensuring a free cross-section of the fluid to be discharged at least equal to the section of the outlet orifice are constituted by the upper bottom of the upper element, of generally pseudo-conical shape, the generator of which forms with the longitudinal axis of the device an angle a less than 75 °. With reference p , the angle a is between 45 ° and 75 °.
  • the means for protecting the outlet of the pipe against rain consist of the upper element, the diameter D of which is preferably between 2 and 3.5 times the diameter d of this orifice. .
  • the diameter D of the upper element ' is between 2.2 times the diameter ci of the outlet orifice and 3.1 times the diameter d of the outlet orifice.
  • the means making it possible to increase the height of the final depression zone relative to the height of the initial depression zone are constituted by the upper cap of the upper element and the lower bottom of the lower element whose generatrices form a angle ⁇ less than about 60 °.
  • the single figure is a schematic view of the device according to the invention.
  • the gaseous fluid suction device comprises in combination a conduit 1, a hollow circular lower element 2, with which it is made integral.
  • the lower element 2 consists of a lower bottom 3 and a lower cap 4, each of them having a pseudo-conical shape of axis XX, rigidly fixed to one another according to two large common bases 5 of circular outline.
  • the duct 1 coaxially crosses the bottom bottom 3 and the bottom cap 4.
  • the upper element 6 consists of an upper bottom 7 and an upper cap 8, each of them having a pseudo-conical shape. These two elements are associated with each other along their large circular contour base 9. More particularly, the lower bottom 3 and the lower cap 4 have the shape of a truncated cone, the diameter of the small base of these truncated cones being substantially equal to the diameter d of the duct 1.
  • the static vacuum cleaner comprises means 10 making it possible to ensure a free section Sh of passage of fluid to be evacuated between the lower element 2 and the upper element 3 at least equal to the section Sd of the orifice outlet of the conduit 1 through which the fluids to be discharged arrive; means 11 allowing the protection of the outlet orifice of the conduit 1 against rain and means 12 making it possible to increase the height H2 of final depression relative to the height H1 of initial depression.
  • the means 10 making it possible to ensure a free section Sh of passage of fluids to be evacuated between the lower element 2 and the upper element 3 at least equal to the section Sd of the outlet orifice of the conduit 1 through which the fluids arrive to be evacuated are constituted by the upper bottom 7 of the upper element 6 of generally conical shape whose generator forms with the longitudinal axis XX of the device an angle a less than 75 °.
  • the fluids will leave the device according to the result of the vertical vecterr 1 and the inclined vector of length 11, and the flow rate of evacuated fluid will be greater.
  • free cross section Sh for passage of the fluid is meant the surface of the cylindrical area of axis XX, of revolution, with circular base, which is between the lower element 2 and the upper element 6, in projection of the duct 1.
  • this free section Sh is a cylindrical revolution of height h, the height h being between the circular base 13 of the lower cap 4 and the upper bottom 7, in line with the duct 1.
  • the circular base is of diameter d .
  • This free section is reduced by the surface that is occupied by the wind, and if the wind occupies half the volume, the free surface is reduced by half. Consequently, it can be written that the free section of the fluid passage is equal to . 2 ⁇ . ( ) h.
  • the free section Sh which naturally was equal to Sd can be increased up to 2 Sd, by increasing the distance h to 0.5d therefore by increasing the distance between the lower element 2 and the element higher 6.
  • the section Sh can be increased with respect to Sd by increasing h to 0.6d.
  • the angle ⁇ is between 15 ° and 45 °.
  • the angle a complementary to ⁇ , formed between the axis XX and the generatrix 7 of the upper bottom, is between approximately 75 ° and 45 °.
  • the angle ⁇ 'formed by the direction of the wind with respect to the axis YY perpendicular to the longitudinal axis XX of the device is an angle less than the angle ⁇ . Consequently, one can write ⁇ 'between 15 ° and 45 °.
  • the angle formed by the generator 7 of the upper bottom of the upper element 6 and the axis XX is between 0 and 75 °.
  • the angle ⁇ which is the angle formed by the generator 8 of the upper cap and the generator 7 of the upper bottom is between 0 and 60 °.
  • the angle y formed between the generator 7 and the generator 4 has a bisector coincident with the axis YY. It provides the Venturi effect. Its values are a function of values given at the angle l'angle.
  • the means 11 for protecting the outlet orifice of the conduit 1 against rain are formed by the upper element whose diameter D is less than or equal to 3.5 times the diameter d of the outlet orifice.
  • the diameter D is equal to 3d.
  • the angle ⁇ has a lower value, namely a value equal to the angle ⁇ ', when the ascending speed of the discharged fluids is not negligible, and if the height h is equal to , so that the angle ⁇ is equal to 45 °, that is to say to protect as much as possible the outlet orifice of the conduit 1, it is possible to provide for a smaller diameter D which can for example be equal to! twice the diameter of conduit 1.
  • the means 12 making it possible to increase the height of the final depression zone with respect to the height H1 of the initial depression zone are constituted by the upper cap 8 of the upper element and the lower bottom 3 of the lower element, generators 8 and 3 form an angle ⁇ less than about 60 °.
  • the height H1 is the distance between the circular external edges 14 of the lower element and 16 of the upper element. As for the distance H2, this is the distance between the generators 12 respectively of the bottom bottom 3 and the top cap 8, this distance being taken along an axis parallel to the axis XX, Preferably, the ratio H2 is approximately 3. H1
  • the static device according to the invention therefore makes it possible to channel the wind by reducing its direction in a direction perpendicular to the longitudinal axis XX of the duct 1.
  • the axis of the duct 1 does not have to be necessarily situated in a vertical plane, therefore may not be perpendicular to the horizontal plane.
  • Means 17 can also be provided for regulating the nominal flow rate of the gaseous fluids discharged.
  • a flap whose pivot axis 18 is offset from the center of its largest diameter.
  • the flap is pseudo-circular, not planar. It allows to more or less close the duct 1 depending on the wind speed. It is therefore possible to obtain a fixed nominal flow rate of the gaseous fluids discharged, whatever the wind speed. When this speed is low, the flap only very slightly closes the duct 1.
  • the flap pivots about its axis of rotation which, preferably, is perpendicular to the longitudinal axis XX of the device.
  • the duct 1 is closed more significantly, all things being equal.
  • the shutter pivots in proportion to the wind speed thanks to a calibration by a spring whose return force is progressive or thanks to a counterweight which is more or less heavy depending on the wind speed.
  • the static vacuum cleaner according to the invention can, if necessary, be devoid of the lower bottom 3, and / or of the upper cap 8.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Separation By Absorption (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Exhaust Silencers (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Pens And Brushes (AREA)
  • Glass Compositions (AREA)
  • Thermal Insulation (AREA)
  • Air-Flow Control Members (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

A flue terminal comprises upper and lower superimposed hollow circular co-axially fixed units (6, 2). A flue (1) passes through the lower unit and opens into a space between the lower and upper units which is in the shape of a venturi. <IMAGE>

Description

La présente invention concerne un aspirateur statique de fluide gazeux perfectionné, notamment pour des gaz rejetés ou des fumées à partir d'une cheminée ou d'une sortie quelconque à axe sensiblement vertical.The present invention relates to an improved static gaseous fluid vacuum cleaner, in particular for exhaust gases or fumes from a chimney or any outlet with a substantially vertical axis.

On connaît déjà des aspirateurs composés d'un élément inférieur et'd'un élément supérieur, creux, circulaires, superposés, coaxiaux, rigidement fixés l'un à l'autre, à une certaine distance l'un de l'autre. L'élément inférieur de l'aspirateur comporte un fond inférieur et un chapeau inférieur, de forme générale tronconique, associés l'un à l'autre, rigidement fixés l'un avec l'autre par leur grande base commune et traversés coaxialement par un tuyau qui leur est solidaire et qui débouche dans l'espace compris entre les deux éléments inférieur et supérieur par un orifice de sortie des fluides gazeux. L'élément supérieur est constitué d'un fond supérieur et d'un chapeau supérieur, chacun d'eux ayant une forme générale de cône, rigidement fixés l'un à l'autre par leur grande base commune.Vacuum cleaners are already known which consist of a lower element and an upper element, hollow, circular, superimposed, coaxial, rigidly fixed to one another, at a certain distance from each other. The lower element of the vacuum cleaner comprises a lower bottom and a lower cap, of generally frustoconical shape, associated with each other, rigidly fixed with each other by their large common base and crossed coaxially by a pipe which is integral with them and which opens into the space between the two lower and upper elements through an outlet for gaseous fluids. The upper element consists of an upper bottom and an upper cap, each of them having a general cone shape, rigidly fixed to each other by their large common base.

Ces aspirateurs statiques servent d'abord à faciliter l'élimination des fluides gazeux à partir de l'orifice de sortie du conduit prolongeant la cheminée-au-dessus de laquelle cet appareil est destiné à être monté. Par leur conception, ces aspirateurs statiques font appel à l'effet d'aspiration d'un tube Venturi. Le tuyau par lequel arrivent les fluides gazeux débouche dans l'espace compris entre les deux éléments inférieur et supérieur de l'aspirateur. Le vent, dans l'espace situé entre ces éléments inférieur et supérieur a un écoulement de l'air similaire à celui d'un tube Venturi, les fluides gazeux étant attirés à partir de l'orifice de sortie de ces fluides.These static vacuum cleaners first serve to facilitate the elimination of gaseous fluids from the outlet opening of the conduit extending the chimney-above which this device is intended to be mounted. By design, these static vacuums use the suction effect of a Venturi tube. The pipe through which the gaseous fluids arrive opens into the space between the two upper and lower elements of the vacuum cleaner. The wind, in the space between these lower and upper elements has an air flow similar to that of a Venturi tube, the gaseous fluids being drawn from the outlet of these fluids.

Ces aspirateurs statiques donnent en général de bons résultats en présence de vent, mais ils sont construits sans tenir compte de la section libre se trouvant entre l'élément inférieur et l'élément supérieur, à savoir la section libre de passage en périphérie du fluide à évacuer. Or, cette section libre a une action très importante, plus particulièrement quand l'aspirateur statique n'est pas soumis à l'action du vent, donc par temps calme. Il se produit alors une perte de charge très importante, ce qui diminue la vitesse d'expulsion verticale des fluides à évacuer.These static vacuum cleaners generally give good results in the presence of wind, but they are built without taking into account the free section located between the lower element and the upper element, namely the free passage section at the periphery of the fluid to be clear out. However, this free section has a very important action, more particularly when the static vacuum cleaner is not subjected to the action of the wind, therefore in calm weather. A very large pressure drop then occurs, which decreases the vertical expulsion speed of the fluids to be evacuated.

Les aspirateurs statiques connus permettent également d'éviter que l'eau de pluie ne viennent pénétrer dans le conduit de la cheminée par l'intermédiaire de l'orifice de sortie du fluide gazeux. Cependant, ils ne sont pas conçus spécialement pour une pluie tombant selon un certain angle par rapport à l'axe vertical du conduit prolongeant la cheminée. Il ne sont pas prévus non plus pour fonctionner avec des vents ascendants, ou descendants, formant un certain angle avec l'horizontale.Known static vacuum cleaners also make it possible to prevent rainwater from entering the chimney flue via the outlet outlet for the gaseous fluid. However, they are not specially designed for rain falling at an angle to the vertical axis of the pipe extending the chimney. They are also not intended to operate with ascending or descending winds, forming a certain angle with the horizontal.

Par ailleurs, ces aspirateurs ne sont pas conçus pour obtenir un débit nominal fixe de fluides gazeux rejetés, quelle que soit la vitesse du vent.Furthermore, these vacuum cleaners are not designed to obtain a fixed nominal flow rate of gaseous fluids discharged, whatever the wind speed.

L'invention a pour but de pallier ces inconvénients. A cet effet, elle propose un aspirateur statique du type défini ci-dessus, caractérisé par le fait qu'il comporte des moyens permettant d'assurer une_section libre de passage du fluide à évacuer entre l'élément inférieur et l'élément supérieur au moins égale à la section de l'orifice de sortie du tuyau par lequel arrivent les fluides gazeux à évacuer ; des moyens permettant la protection de l'orifice de sortie du conduit contre la pluie et des moyens permettant d'augmenter la hauteur de zone de dépression finale par rapport à la hauteur de la zone de dépression initiale.The invention aims to overcome these drawbacks. To this end, it offers a static vacuum cleaner of the type defined above, characterized in that it comprises means making it possible to ensure a free passage of the fluid to be evacuated between the lower element and the upper element at least equal to the section of the outlet of the pipe through which the gaseous fluids to be discharged arrive; means allowing the protection of the outlet orifice of the conduit against rain and means making it possible to increase the height of the final depression area relative to the height of the initial depression area.

Les moyens permettant d'assurer une section libre de passage du fluide à évacuer au moins égale à la section de l'orifice de sortie sont constitués par le fond supérieur de l'élément supérieur, de forme générale pseudo-conique, dont la génératrice forme avec l'axe longitudinal du dispositif un angle a inférieur à 75°. De préférence, l'angle a est compris entre 45° et 75°.The means for ensuring a free cross-section of the fluid to be discharged at least equal to the section of the outlet orifice are constituted by the upper bottom of the upper element, of generally pseudo-conical shape, the generator of which forms with the longitudinal axis of the device an angle a less than 75 °. With reference p , the angle a is between 45 ° and 75 °.

Les moyens permettant la protection de l'orifice de sortie du tuyau contre la pluie sont constitués par l'élément supérieur, dont le diamètre D est de préférence compris entre 2 et 3,5 fois le diamètre d de cet ori.- fice de sorite.The means for protecting the outlet of the pipe against rain consist of the upper element, the diameter D of which is preferably between 2 and 3.5 times the diameter d of this orifice. .

Plus préférentiellement, le diamètre D de l'élément supérieur 'est compris entre 2,2 fois le diamètre ci de l'orifice de sortie et 3,1 fois le diamètre d de l'orifice de sortie.More preferably, the diameter D of the upper element 'is between 2.2 times the diameter ci of the outlet orifice and 3.1 times the diameter d of the outlet orifice.

Les moyens permettant d'augmenter la hauteur de la zone de dépression finale par rapport à la hauteur de la zone de dépression initiale sont constitués par le chapeau supérieur de l'élément supérieur et le fond inférieur de l'élément inférieur dont les génératrices forment un angle δ inférieur à 60° environ.The means making it possible to increase the height of the final depression zone relative to the height of the initial depression zone are constituted by the upper cap of the upper element and the lower bottom of the lower element whose generatrices form a angle δ less than about 60 °.

La description suivante, en regard du dessin annexé à titre d'exemple non limitatif permettra d'illustrer un mode de réalisation de l'invention.The following description, with reference to the attached drawing by way of nonlimiting example, will illustrate an embodiment of the invention.

La figure unique est une vue schématique du dispositif selon l'invention.The single figure is a schematic view of the device according to the invention.

Le dispositif aspirateur de fluide gazeux comporte en combinaison un conduit 1, un élément inférieur 2 creux, circulaire, avec lequel il est rendu solidaire. L'élément inférieur 2 est constitué d'un fond inférieur 3 et d'un chapeau inférieur 4, chacun d'eux ayant une forme pseudo-conique d'axe XX, fixés rigidement l'un à l'autre suivant deux grandes bases communes 5 de contour circulaire. Le conduit 1 traverse coaxialement le fond inférieur 3 et le chapeau inférieur 4.The gaseous fluid suction device comprises in combination a conduit 1, a hollow circular lower element 2, with which it is made integral. The lower element 2 consists of a lower bottom 3 and a lower cap 4, each of them having a pseudo-conical shape of axis XX, rigidly fixed to one another according to two large common bases 5 of circular outline. The duct 1 coaxially crosses the bottom bottom 3 and the bottom cap 4.

L'élément supérieur 6 est constitué d'un fond supérieur 7 et d'un chapeau supérieur 8, chacun d'eux ayant une forme pseudo-conique. Ces deux éléments sont associés l'un à l'autre suivant leur grande base de contour circulaire 9. Plus particulièrement, le fond inférieur 3 et le chapeau inférieur 4 ont une forme de cône tronqué, le diamètre de la petite base de ces cônes tronqués étant sensiblement égal au diamètre d du conduit 1.The upper element 6 consists of an upper bottom 7 and an upper cap 8, each of them having a pseudo-conical shape. These two elements are associated with each other along their large circular contour base 9. More particularly, the lower bottom 3 and the lower cap 4 have the shape of a truncated cone, the diameter of the small base of these truncated cones being substantially equal to the diameter d of the duct 1.

Selon l'invention, l'aspirateur statique comporte des moyens 10 permettant d'assurer une section libre Sh de passage de fluide à évacuer entre l'élément inférieur 2 et l'élément supérieur 3 au moins égale à la section Sd de l'orifice de sortie du conduit 1 par lequel arrivent les fluides à évacuer ; des moyens 11 permettant la protection de l'orifice de sortie du conduit 1 contre la pluie et des moyens 12 permettant d'augmenter la hauteur H2 de dépression finale par rapport à la hauteur H1 de dépression initiale.According to the invention, the static vacuum cleaner comprises means 10 making it possible to ensure a free section Sh of passage of fluid to be evacuated between the lower element 2 and the upper element 3 at least equal to the section Sd of the orifice outlet of the conduit 1 through which the fluids to be discharged arrive; means 11 allowing the protection of the outlet orifice of the conduit 1 against rain and means 12 making it possible to increase the height H2 of final depression relative to the height H1 of initial depression.

Les moyens 10 permettant d'assurer une section libre Sh de passage de fluides à évacuer entre l'élément inférieur 2 et l'élément supérieur 3 au moins égale à la section Sd de l'orifice de sortie du conduit 1 par lequel arrivent les fluides à évacuer sont constitués par le fond supérieur 7 de l'élément supérieur 6 de forme généralement conique dont la génératrice forme avec l'axe longitudinal XX du dispositif un angle a inférieur à 75°.The means 10 making it possible to ensure a free section Sh of passage of fluids to be evacuated between the lower element 2 and the upper element 3 at least equal to the section Sd of the outlet orifice of the conduit 1 through which the fluids arrive to be evacuated are constituted by the upper bottom 7 of the upper element 6 of generally conical shape whose generator forms with the longitudinal axis XX of the device an angle a less than 75 °.

En effet, le vent suivant sa direction, peut avoir une influence plus ou moins favorable sur le tirage.Indeed, the wind following its direction, can have a more or less favorable influence on the draft.

Quand le vent est dirigé de bas en haut, par exemple selon la direction de la flèche F1 formant un angle β rapport à un axe YY perpendiculaire à l'axe longitudinal XX du dispositif, il augmente le tirage.When the wind is directed from bottom to top, for example in the direction of the arrow F1 forming an angle β relative to an axis YY perpendicular to the longitudinal axis XX of the device, it increases the draft.

S'il n'existe pas de vent, et si la vitesse de sortie des fluides à extraire est représentée par un vecteur parallèle à l'axe XX, de préférence vertical, de longueur 1 , le débit de fluide écoulé par seconde est égal à la section Sd.l.If there is no wind, and if the speed of exit of the fluids to be extracted is represented by a vector parallel to the axis XX, preferably vertical, of length 1, the flow of fluid flowed per second is equal to the section Sd.l.

Si le vent vient agir selon une direction ascendante, par exemple selon la flèche FI, les fluides sortiront du dispositif suivant la résultante du vecterr vertical 1 et du vecteur incliné de longueur 11 , et le débit de fluide évacué sera plus important.If the wind comes to act in an upward direction, for example according to the arrow FI, the fluids will leave the device according to the result of the vertical vecterr 1 and the inclined vector of length 11, and the flow rate of evacuated fluid will be greater.

Par contre, si le vent vient à agir selon une direction perpendiculaire à l'axe XX longitudinal du dispositif, il est nécessaire, pour qu'il y ait un débit de fluide, que la section libre Sh de passage de fluide entre l'élément inférieur 2 et l'élément supérieur 3 soit au moins égale à la section Sd de l'orifice de sortie du conduit 1.On the other hand, if the wind comes to act in a direction perpendicular to the longitudinal axis XX of the device, it is necessary, for there to be a flow of fluid, that the free section Sh of passage of fluid between the element lower 2 and the upper element 3 is at least equal to the section Sd of the outlet orifice of the duct 1.

Par section libre Sh de passage du fluide, on entend la surface de l'aire cylindrique d'axe XX, de révolution, à base circulaire, qui est comprise entre l'élément inférieur 2 et l'élément supérieur 6, en projection du conduit 1. Ainsi, cette section libre Sh est cylindrique de révolution de hauteur h, la hauteur h étant comprise entre la base circulaire 13 du chapeau inférieur 4 et le fond supérieur 7, au droit du conduit 1. La base circulaire est de diamètre d. Cette section libre est diminuée par la surface qui est occupée par le vent, et si le vent occupe la moitié du volume, la surface libre est diminuée de moitié. Par conséquent, on peut écrire que la section libre du passage de fluide est égale à

Figure imgb0001
. 2 π .(
Figure imgb0002
) h. By free cross section Sh for passage of the fluid is meant the surface of the cylindrical area of axis XX, of revolution, with circular base, which is between the lower element 2 and the upper element 6, in projection of the duct 1. Thus, this free section Sh is a cylindrical revolution of height h, the height h being between the circular base 13 of the lower cap 4 and the upper bottom 7, in line with the duct 1. The circular base is of diameter d . This free section is reduced by the surface that is occupied by the wind, and if the wind occupies half the volume, the free surface is reduced by half. Consequently, it can be written that the free section of the fluid passage is equal to
Figure imgb0001
 . 2 π. (
Figure imgb0002
 ) h.

Par contre, la section de l'orifice de sortie du tuyau est égale à Sd = π.(

Figure imgb0003
)2. On a donc h =
Figure imgb0004
. Par conséquent la tangente de l'angle β formé entre la génératrice 7 du fond supérieur et l'axe YY perpendiculaire à l'axe longitudinal XX est égale à 1 . Ainsi tg β = 1 et l'angle β est égal à 26°5.On the other hand, the section of the outlet of the pipe is equal to Sd = π. (
Figure imgb0003
 ) 2 . So we have h =
Figure imgb0004
 . Consequently, the tangent of the angle β formed between the generatrix 7 of the upper bottom and the axis YY perpendicular to the longitudinal axis XX is equal to 1. Thus tg β = 1 and the angle β is equal to 26 ° 5 .

Cependant, grâce au dispositif la section libre Sh qui naturellement était égale à Sd peut être augmentée jusqu'à 2 Sd, en augmentant la distance h jusqu'à 0,5d donc en augmentant la distance entre l'élément inférieur 2 et l'élément supérieur 6. On peut augmenter la section Sh par rapport à Sd en augmentant h jusqu'à 0,6d.However, thanks to the device the free section Sh which naturally was equal to Sd can be increased up to 2 Sd, by increasing the distance h to 0.5d therefore by increasing the distance between the lower element 2 and the element higher 6. The section Sh can be increased with respect to Sd by increasing h to 0.6d.

L'angle β est compris entre 15° et 45°. L'angle a, complémentaire de β, formé entre l'axe XX et la génératrice 7 du fond supérieur, est compris entre environ 75° et 45°.The angle β is between 15 ° and 45 °. The angle a, complementary to β, formed between the axis XX and the generatrix 7 of the upper bottom, is between approximately 75 ° and 45 °.

Si le fluide à évacuer a une vitesse ascensionnelle qui n'est pas négligeable, l'angle β' formé par la direction du vent par rapport à l'axe YY perpendiculaire à l'axe longitudinal XX du dispositif est un angle inférieur à l'angle β. Par conséquent, on peut écrire β' compris entre 15° et 45°. L'angle a formé par la généràtrice 7 du fond supérieur de l'élément supérieur 6 et l'axe XX est compris entre 0 et 75°. L'angle λ qui est l'angle formé par la génératrice 8 du chapeau supérieur et la génératrice 7 du fond supérieur est compris entre 0 et 60°. L'angle y formé entre la génératrice 7 et la génératrice 4 a une bissectrice confondue avec l'axe YY. Il permet d'obtenir l'effet Venturi ses valeurs sont fonction de valeurs données à l'angle δ.If the fluid to be evacuated has a non-negligible rate of rise, the angle β 'formed by the direction of the wind with respect to the axis YY perpendicular to the longitudinal axis XX of the device is an angle less than the angle β. Consequently, one can write β 'between 15 ° and 45 °. The angle formed by the generator 7 of the upper bottom of the upper element 6 and the axis XX is between 0 and 75 °. The angle λ which is the angle formed by the generator 8 of the upper cap and the generator 7 of the upper bottom is between 0 and 60 °. The angle y formed between the generator 7 and the generator 4 has a bisector coincident with the axis YY. It provides the Venturi effect. Its values are a function of values given at the angle l'angle.

Les moyens 11 permettant la protection de l'orifice de sortie du conduit 1 contre la pluie sont constitués par l'élément supérieur dont le diamètre D est inférieur ou égal à 3,5 fois le diamètre d de l'orifice de sortie.The means 11 for protecting the outlet orifice of the conduit 1 against rain are formed by the upper element whose diameter D is less than or equal to 3.5 times the diameter d of the outlet orifice.

Si la pluie tombe selon la direction de la flèche F2 en formant un angle δ avec l'axe YY perpendiculaire à l'axe XX longitudinal du dispdsitif, et si on appelle dl la distance qui sépare le bord externe 14 de l'élénent inférieur et la projection de l'orifice de sortie sur l'axe YY, cette projection ayant la référence 15, on peut écrire :
tg 6 =

Figure imgb0005
If the rain falls in the direction of the arrow F2 by forming an angle δ with the axis YY perpendicular to the longitudinal axis XX of the device, and if we call dl the distance between the edge external 14 of the lower element and the projection of the outlet orifice on the YY axis, this projection having the reference 15, we can write:
tg 6 =
Figure imgb0005

Ainsi, si l'angle δ est égal à 45°, et si par ailleurs le paramètre h est égal à

Figure imgb0006
et que l'angle β est égal à 26°,5, le diamètre D est égal à 3d.Thus, if the angle δ is equal to 45 °, and if moreover the parameter h is equal to
Figure imgb0006
 and that the angle β is equal to 26 °, 5, the diameter D is equal to 3d.

Si l'angle β a une valeur inférieure à savoir une valeur égale à l'angle β', lorsque la vitesse ascensionnelle des fluides évacués n'est pas négligeable, et si la hauteur h est égale à

Figure imgb0007
, pour que l'angle δ soit égal à 45°, c'est à dire pour protéger au maximum l'orifice de sortie du conduit 1, on peut prévoir un diamètre D moins important qui peut par exemple être égal à ! deux fois le diamètre du conduit 1.If the angle β has a lower value, namely a value equal to the angle β ', when the ascending speed of the discharged fluids is not negligible, and if the height h is equal to
Figure imgb0007
 , so that the angle δ is equal to 45 °, that is to say to protect as much as possible the outlet orifice of the conduit 1, it is possible to provide for a smaller diameter D which can for example be equal to! twice the diameter of conduit 1.

Ainsi, on peut écrire D compris entre 2d et 3,5d.Thus, we can write D between 2d and 3.5d.

Les moyens 12 permettant d'augmenter la hauteur de la zone de dépression finale par rapport à la hauteur H1 de la zone de dépression initiale sont constitués par le chapeau supérieur 8 de l'élément supérieur et le fond inférieur 3 de l'élément inférieur dont les génératrices 8 et 3 forment un angle α inférieur à 60° environ.The means 12 making it possible to increase the height of the final depression zone with respect to the height H1 of the initial depression zone are constituted by the upper cap 8 of the upper element and the lower bottom 3 of the lower element, generators 8 and 3 form an angle α less than about 60 °.

La hauteur H1 est la distance entre les bords externes circulaires 14 de l'élément inférieur et 16 de l'élément supérieur. Quant à la distance H2, c'est la distance entre les génératrices 12 respectivement du fond inférieur 3 et du chapeau supérieur 8, cette distance étant prise selon un axe parallèle à l'axe XX, De préférence, le rapport H2 est d'environ 3. H1The height H1 is the distance between the circular external edges 14 of the lower element and 16 of the upper element. As for the distance H2, this is the distance between the generators 12 respectively of the bottom bottom 3 and the top cap 8, this distance being taken along an axis parallel to the axis XX, Preferably, the ratio H2 is approximately 3. H1

Le dispositif statique selon l'invention permet donc de canaliser le vent en ramenant sa direction selon une direction perpendiculaire à' l'axe XX longitudinal du conduit 1.The static device according to the invention therefore makes it possible to channel the wind by reducing its direction in a direction perpendicular to the longitudinal axis XX of the duct 1.

Ainsi l'axe du conduit 1 n'a pas à être obligatoirement situé dans un plan vertical, donc peut ne pas être perpendiculaire au plan horizontal.Thus the axis of the duct 1 does not have to be necessarily situated in a vertical plane, therefore may not be perpendicular to the horizontal plane.

On peut prévoir en outre des moyens 17 de régulation du débit nominal des fluides gazeux rejetés.Means 17 can also be provided for regulating the nominal flow rate of the gaseous fluids discharged.

Ces moyens sont constitués par un volet dont l'axe 18 de pivotement est décalé par rapport au centre de son plus grand diamètre. De préférence, le volet est pseudo-circulaire, non plan. Il permet d'obturer plus ou moins le conduit 1 en fonction de la vitesse du vent. On peut donc obtenir un débit nominal fixe des fluides gazeux rejetés, quelle que soit la vitesse du vent. Lorsque cette vitesse est faible, le volet n'obture que très faiblement le conduit 1. Lorsque la vitesse du vent augmente, le volet pivote autour de son axe de rotation qui, de préférence, est perpendiculaire à l'axe XX longitudinal du dispositif. Le conduit 1 est obturé de façon plus importante, touteschoses égales par ailleurs. Le volet pivote de façon proportionnelle à la vitesse du vent grâce à un tarage par un ressort dont la force de rappel est progressive ou grâce à un contrepoids qui est plus ou moins lourd en fonction de la vitesse du vent.These means are constituted by a flap whose pivot axis 18 is offset from the center of its largest diameter. Preferably, the flap is pseudo-circular, not planar. It allows to more or less close the duct 1 depending on the wind speed. It is therefore possible to obtain a fixed nominal flow rate of the gaseous fluids discharged, whatever the wind speed. When this speed is low, the flap only very slightly closes the duct 1. When the wind speed increases, the flap pivots about its axis of rotation which, preferably, is perpendicular to the longitudinal axis XX of the device. The duct 1 is closed more significantly, all things being equal. The shutter pivots in proportion to the wind speed thanks to a calibration by a spring whose return force is progressive or thanks to a counterweight which is more or less heavy depending on the wind speed.

L'aspirateur statique suivant l'invention peut, le cas échéant être dépourvu du fondinférieur 3, et/ou du chapeau supérieur 8.The static vacuum cleaner according to the invention can, if necessary, be devoid of the lower bottom 3, and / or of the upper cap 8.

Claims (10)

1. Aspirateur statique comportant un élément inférieur (2) et un élément supérieur formant Venturi (6) creux, circulaires, superposés, coaxiaux, fixés rigidement l'un à l'autre à une certaine distance l'un de l'autre, l'élément inférieur (2) comportant un chapeau inférieur (4) traversé par un conduit (1) qui débouche dans l'espace compris entre les deux éléments inférieur (2) et supérieur (6) par un orifice de sortie des fluides gazeux, l'élément supérieur comportant un fond supérieur (7) caractérisé par le fait qu'il comporte des moyens (10) permettant d'assurer une section Sh libre de passage du fluide à évacuer entre l'élément inférieur (2) et l'élément supérieur (6), au moins égale à la section Sd de l'orifice de sortie du conduit (1) ; des moyens (11) permettant la protection de l'orifice de sortie du conduit (1) contre la pluie et des moyens (12) permettant d'augmenter !la hauteur H2 de zone de dépression finale par rapport à la hauteur Hl de zone de dépression :'initiale.1. Static vacuum cleaner comprising a lower element (2) and an upper element forming a hollow Venturi (6), circular, superimposed, coaxial, rigidly fixed to each other at a certain distance from each other, l 'lower element (2) comprising a lower cap (4) traversed by a conduit (1) which opens into the space between the two lower elements (2) and upper (6) by an outlet for gaseous fluids, l 'upper element comprising an upper bottom (7) characterized in that it comprises means (10) making it possible to ensure a cross section Sh free of passage of the fluid to be evacuated between the lower element (2) and the upper element (6), at least equal to the section Sd of the outlet orifice of the conduit (1); means (11) for protecting the outlet orifice of the duct (1) against rain and means (12) for increasing the height H2 of the final depression zone relative to the height Hl of the depression: 'initial. 2. Aspirateur statique selon la revendication 1, caractérisé par le fait que les moyens (10) permettant d'assurer une section Sh libre de passage du fluide à évacuer au moins égale à la section Sd de l'orifice de sortie sont constitués par le fond supérieur (7) de l'élément supérieur (6) de forme générale pseudo-conique dont la génératrice (7) forme avec l'axe longitudinal XX du dispositif un angle a de préférence inférieur à 75°.2. Static vacuum cleaner according to claim 1, characterized in that the means (10) for ensuring a section Sh free of passage of the fluid to be discharged at least equal to the section Sd of the outlet orifice are constituted by the upper bottom (7) of the upper element (6) of generally pseudo-conical shape whose generator (7) forms with the longitudinal axis XX of the device an angle a preferably less than 75 °. 3. Aspirateur statique selon l'une quelconque des revendications 1 et 2 caractérisé par le fait que la hauteur h prise entre la base (13) du chapeau inférieur (4) et le fond supérieur (7) au droit du conduit (1), est comprise entre 0,25 fois le diamètre d du conduit (1) et 0,6 fois le diamétre d.3. Static vacuum cleaner according to any one of claims 1 and 2 characterized in that the height h taken between the base (13) of the lower cap (4) and the upper bottom (7) in line with the duct (1), is between 0.25 times the diameter d of the conduit (1) and 0.6 times the diameter d. 4. Aspirateur statique selon l'une quelconque des revendication 2 et 3, caractérisé par le fait que l'angle a est compris entre 45 et 75°.4. Static vacuum cleaner according to any one of claims 2 and 3, characterized in that the angle a is between 45 and 75 °. 5. Aspirateur statique selon l'une quelconque des revendications 1 à 4, caractérisé par le fait que les moyens (11) permettant la protection de l'orifice de sortie du conduit (1) contre la pluie sont constitués par l'élément supérieur (6) dont le diamètre D est inférieur ou égal à 3,5 fois le diamètre d de l'orifice de sortie.5. Static vacuum cleaner according to any one of claims 1 to 4, characterized in that the means (11) allowing the protection of the outlet orifice of the conduit (1) against rain are constituted by the upper element ( 6) whose diameter D is less than or equal to 3.5 times the diameter d of the outlet orifice. 6. Aspirateur statique selon la revendication 5, caractérisé par le fait que le diamètre D de lélément supérieur est compris entre deux fois le diamètre d de l'orifice de sortie et 3,5 fois le diamètre d de l'orifice de sortie.6. Static vacuum cleaner according to claim 5, characterized in that the diameter D of the upper element is between twice the diameter d of the outlet orifice and 3.5 times the diameter d of the outlet orifice. 7. Aspirateur statique selon l'une quelconque des revendications 1 à 6, caractérisé par le fait que les moyens permettant d'augmenter la hauteur H2 de la zone de dépression finale par rapport à la hauteur Hl de la zone de dépression initiale sont constitués par le chapeau supérieur (8) de l'élément supérieur (6) et le fond inférieur (3) de l'élément inférieur (2).7. Static vacuum cleaner according to any one of claims 1 to 6, characterized in that the means making it possible to increase the height H2 of the final depression zone with respect to the height Hl of the initial depression zone are constituted by the upper cap (8) of the upper element (6) and the lower bottom (3) of the lower element (2). 8. Aspirateur statique selon la revendication 7, caractérisé par le fait que les génératrices (12) repsectivement du fond inférieur (3) et du chapeau supérieur (8) forment entre elles un angle à inférieur à 60° environ.8. Static vacuum cleaner according to claim 7, characterized in that the generators (12) respectively of the bottom bottom (3) and the top cap (8) form between them an angle of less than about 60 °. 9. Aspirateur statique selon l'une quelconque des revendications 1 à 8 caractérisé par le fait qu'il comporte des moyens (17) de régulation du débit nominal des fluides gazeux rejetés.9. Static vacuum cleaner according to any one of claims 1 to 8 characterized in that it comprises means (17) for regulating the nominal flow rate of the gaseous fluids discharged. 10. Aspirateur statique selon la revendication 9, caractérisé par le fait que les moyens de régulation du débit nominal des fluides gazeux rejetés sont constitués par un volet pseudo-circulaire (17) non plan, pouvant pivoter autour d'un'axe (18) sensiblement perpendiculaire à l'axe XX longitudinal du dispositif, cet axe étant décalé par rapport au centre du plus grand diamètre du volet.10. Static vacuum cleaner according to claim 9, characterized in that the means for regulating the nominal flow rate of the gaseous fluids discharged consist of a non-planar pseudo-circular flap (17) which can pivot about an axis (18) substantially perpendicular to the longitudinal axis XX of the device, this axis being offset from the center of the largest diameter of the flap.
EP82402313A 1981-12-18 1982-12-16 Cowl for gaseous fluid Expired EP0082775B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82402313T ATE41221T1 (en) 1981-12-18 1982-12-16 CHIMNEY PIPE FOR GASEOUS FLUID.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8123681A FR2518710B1 (en) 1981-12-18 1981-12-18 IMPROVED STATIC GAS FLUID VACUUM
FR8123681 1981-12-18

Publications (3)

Publication Number Publication Date
EP0082775A2 true EP0082775A2 (en) 1983-06-29
EP0082775A3 EP0082775A3 (en) 1984-07-18
EP0082775B1 EP0082775B1 (en) 1989-03-08

Family

ID=9265166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82402313A Expired EP0082775B1 (en) 1981-12-18 1982-12-16 Cowl for gaseous fluid

Country Status (5)

Country Link
EP (1) EP0082775B1 (en)
AT (1) ATE41221T1 (en)
DE (1) DE3279509D1 (en)
FR (1) FR2518710B1 (en)
GB (1) GB2112512B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0641973A1 (en) * 1993-09-03 1995-03-08 André Amphoux Device for gaseous fluid removal

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2740862B1 (en) 1995-11-03 1998-01-23 Amphoux Andre DEVICE FOR SUCTION OF A GASEOUS FLUID THROUGH A CONDUIT TO REJECT IT OUTSIDE THE SAME
FR2749930B1 (en) 1996-06-18 1998-09-04 Amphoux Andre EXTRACTION MOUTH FOR VENTILATION OF A ROOM AND STATIC OR STATOMECHANICAL SYSTEM INCLUDING SUCH A MOUTH
FR2755505B1 (en) 1996-11-05 1999-01-15 Amphoux Andre AIR EXTRACTOR FOR VENTILATION
FR2763387B1 (en) 1997-05-13 1999-07-23 Andre Amphoux GAS INJECTION DEVICE FOR DRAFT ASSISTANCE IN A GAS FLUID TRANSPORT SYSTEM
FR2763390B1 (en) 1997-05-13 1999-07-23 Andre Amphoux VENTILATION SYSTEM WITH ADDITIONAL AIR INJECTION FOR DRAFT ASSISTANCE

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR387721A (en) * 1908-03-02 1908-07-21 Societe Veuve E. Charpentier Et Cie Suction bolster
FR1403955A (en) * 1964-06-08 1965-06-25 Static-dynamic vacuum cleaner for gaseous fluids
US3311302A (en) * 1965-03-01 1967-03-28 Danzer Metal Works Co Two-way damper with adjustable sensitivity
FR2034434A6 (en) * 1969-03-31 1970-12-11 Vonlanthen Jean
FR2474651A1 (en) * 1980-01-25 1981-07-31 Amphoux Andre INSTALLATION OF REJECTION IN THE AMBIENT ATMOSPHERE OF A HIGH SPEED PRESSURE GASEOUS FLUID
EP0079256A1 (en) * 1981-10-13 1983-05-18 André Amphoux Static, dynamic and mechanical suction device for gases

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR387721A (en) * 1908-03-02 1908-07-21 Societe Veuve E. Charpentier Et Cie Suction bolster
FR1403955A (en) * 1964-06-08 1965-06-25 Static-dynamic vacuum cleaner for gaseous fluids
US3311302A (en) * 1965-03-01 1967-03-28 Danzer Metal Works Co Two-way damper with adjustable sensitivity
FR2034434A6 (en) * 1969-03-31 1970-12-11 Vonlanthen Jean
FR2474651A1 (en) * 1980-01-25 1981-07-31 Amphoux Andre INSTALLATION OF REJECTION IN THE AMBIENT ATMOSPHERE OF A HIGH SPEED PRESSURE GASEOUS FLUID
EP0079256A1 (en) * 1981-10-13 1983-05-18 André Amphoux Static, dynamic and mechanical suction device for gases

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0641973A1 (en) * 1993-09-03 1995-03-08 André Amphoux Device for gaseous fluid removal
FR2709533A1 (en) * 1993-09-03 1995-03-10 Amphoux Andre Device for discharging gaseous fluid.

Also Published As

Publication number Publication date
EP0082775B1 (en) 1989-03-08
GB2112512A (en) 1983-07-20
DE3279509D1 (en) 1989-04-13
EP0082775A3 (en) 1984-07-18
FR2518710B1 (en) 1988-09-23
GB2112512B (en) 1986-04-03
FR2518710A1 (en) 1983-06-24
ATE41221T1 (en) 1989-03-15

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