WO2009044068A2 - Membrane gas meter with rotating distribution action - Google Patents

Membrane gas meter with rotating distribution action Download PDF

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Publication number
WO2009044068A2
WO2009044068A2 PCT/FR2008/051604 FR2008051604W WO2009044068A2 WO 2009044068 A2 WO2009044068 A2 WO 2009044068A2 FR 2008051604 W FR2008051604 W FR 2008051604W WO 2009044068 A2 WO2009044068 A2 WO 2009044068A2
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WO
WIPO (PCT)
Prior art keywords
rotation
distribution
crank
plate
axis
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Application number
PCT/FR2008/051604
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French (fr)
Other versions
WO2009044068A3 (en
Inventor
Jean-Luc Champougny
Jérémy TISSERANT
Fanny Maurice Villars
Original Assignee
Actaris Sas
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Application filed by Actaris Sas filed Critical Actaris Sas
Publication of WO2009044068A2 publication Critical patent/WO2009044068A2/en
Publication of WO2009044068A3 publication Critical patent/WO2009044068A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
    • G01F3/02—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement
    • G01F3/20—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having flexible movable walls, e.g. diaphragms, bellows
    • G01F3/22—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having flexible movable walls, e.g. diaphragms, bellows for gases
    • G01F3/222—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having flexible movable walls, e.g. diaphragms, bellows for gases characterised by drive mechanism for valves or membrane index mechanism

Definitions

  • the present invention relates to the field of gas meters with deformable membranes comprising several measuring chambers, and a distribution element or spool mounted rotatably about an axis of rotation on a distribution surface in which are formed several openings which are connected each a measuring chamber, the distribution element allowing the gas to enter and exit alternately measurement chambers during its rotational movement about the axis of rotation.
  • the rotational drive of the dispensing element is performed in synchronism with the movement of the membranes through a transmission system comprising a number of levers, and a part called crank.
  • a transmission system comprising a number of levers, and a part called crank.
  • the levers transform these translational movements into a rotational movement printed on the crank.
  • the crank then transmits its rotational movement on the one hand, to the distribution element, and on the other hand, to a series of gears which themselves operate a volume totalizer.
  • FIG. 1 A first solution, described in EP 0128 838, is shown in Figure 1 attached, which illustrates a vertical partial section showing the mounting and driving of a distribution element 1 by a crank 2.
  • the distribution element 1 rests on a distribution surface 3 having a plurality of openings 30 and 31.
  • the lower face 10 of the slide 1 slides on two peripheral rings 32 and 33 of the surface of distribution ensuring tightness.
  • the crank 2 comprises a hub 20 provided with a blind hole pivotally mounted on a fixed axis 34 engaged in an axial bore of the distribution surface 3. The crank can thus rotate about the axis 34 and is rotated in rotation.
  • the hub 20 of the crank is also engaged in a sleeve 11 secured to the dispensing element 1, with a very slight clearance e, e.g., 1/10 th of a millimeter.
  • the crank 2 and the distribution element 1 are secured in rotation by the cooperation of a lug 21 formed in the crank and a radial groove 12 formed in the dispensing element 1. In this first solution, it is therefore the crank 2 which positions the dispensing element 1.
  • crank 2 778 981 is shown in Figure 2 attached.
  • the crank 2 is mounted on a bearing structure 5 having a general shape of LJ, the inside of the LJ being turned towards the dispensing element (not shown), so as to frame the latter.
  • the crank 2 comprises a circular plate 23, a central portion 24 in the form of a hollow tube extending along the axis of rotation, and a finger 25 extending parallel to the axis of rotation.
  • the finger 25 is intended to cooperate with an opening made in the dispensing element (not visible).
  • This second solution has the advantage of not requiring additional sealing ring since here there is no axis passing through the distribution element. Nevertheless, it requires the use of an additional centering pin (not visible in Figure 2) to position the dispensing element. Furthermore, the crank 2 is found in this solution placed between the supporting structure 5 and the distribution element. It results that the assembly of the different parts is relatively complicated to achieve since it requires a pre-assembly of a subassembly including the crank and levers aforementioned system (not shown), which makes it difficult to automate. In addition, the height requirement of this type of guidance is quite important, which limits the possibility of adding features such as a temperature correction device.
  • the present invention aims to overcome the limitations and disadvantages of the two known solutions described above, by proposing a solution in which the geometry of the crank and the distribution element is simplified, so as to improve the assembly and the metrological performance. counter, and to obtain a more compact assembly compared to the solutions of the prior art.
  • a rotary distribution drive membrane gas meter comprising a plurality of measurement chambers, a distribution element rotatably mounted about an axis of rotation on the upper surface of a surface. in which there are several openings which are each connected to a measuring chamber, the distribution element allowing the gas to enter and exit alternately measuring chambers during its rotational movement about the axis of measurement.
  • a transmission system for driving in rotation the distribution element in synchronism with the movements of the membranes comprising a crank drive in rotation of the dispensing element, and a bearing structure having a portion centered on the axis of rotation whose interior is turned towards the distribution element so as to frame the latter and supp carrying said drive crank, said drive crank comprising a plate concentric with the axis of rotation, characterized in that the plate is placed concentrically on a flat surface of said portion and cooperates with an upper part of the element of distribution through a through opening in said planar surface, and in that the counter further comprises, on the one hand, means for guiding the rotation of the driving crank distributed on the lower face of the plate and on said flat surface, and secondly rotational drive means distributed on the lower face of the plate and on the upper part of the distribution element.
  • Said means for rotating the driving crank preferably comprise an annular ring on the flat surface, concentric with the axis of rotation, and a corresponding annular groove formed on the underside of the plate.
  • said annular ring borders the through opening.
  • the annular groove may be formed by a peripheral rim of the plate extending axially downwardly around the entire periphery of the plate, and by a plurality of lugs extending axially from the lower face of the plate, said lugs being uniformly distributed according to an inner circle adit peripheral rim.
  • some of said pins are preferably provided with a stop to prevent the removal of the crank.
  • said drive means comprise, on the lower face of the plate, a rib extending longitudinally symmetrically with respect to the axis of rotation in a plane orthogonal to this axis of rotation, and on the part upper of the dispensing element, a groove of complementary shape for receiving said rib.
  • the plate may further carry, on its upper surface, a toothed wheel concentric with the axis of rotation, adapted to cooperate with a series of gears actuating a volume totalizer.
  • the plate may also advantageously carry, on its upper surface, an eccentric lever extending parallel to the axis of rotation, said lever being adapted to cooperate with different levers of a transmission system connected to the membranes.
  • the rotational drive crank, and / or the dispensing member, and / or the dispensing surface are preferably integrally molded parts of a plastic material.
  • FIG. 1 partially illustrates, in section, a first known arrangement of a crank and a dispensing element
  • FIG. 2 illustrates, in perspective, a second known arrangement of a crank for driving a dispensing element
  • Fig. 3a is a cutaway perspective view from below of a crank and dispenser arrangement according to the present invention.
  • FIG. 3b is a complete perspective from above of the arrangement of FIG. 3a;
  • Figure 3c is a complete bottom view of the arrangement of Figure 3a;
  • FIGS. 4a and 4b are sectional elevations of the arrangement of Figure 3a, one in the plane containing the axis of rotation, the other in a vertical plane does not contain the axis of rotation;
  • - Figure 5 is a perspective view of the sole distribution element according to the non-limiting embodiment of the invention.
  • an arrangement according to the invention comprises, as in the case of the prior art of FIG. 2, a distribution element or slide 1, a distribution surface 3, and a rotation crank 2 for driving the distribution element 1 forming part of a more complete transmission system (not visible) allowing the rotational drive of the dispensing element in synchronism with the movements of the membranes.
  • the distribution element 1 is conventionally based on the upper surface of the distribution surface 3, and is rotated by the crank 2 so that its lower surface can slide on two rings 32, 33 (FIGS. 3a and 3c) with planar upper edges of the distribution surface 3.
  • the outer circular ring 32 of the distribution surface externally defines four openings 30 each having the shape of a quarter sector circle, distributed concentrically and separated by radial sealing strips 36. Each opening 30 is able to communicate with a corresponding measurement chamber of the meter to allow admission of the gas into said measuring chamber.
  • the circular ring 33 concentric with the first ring 32, but of smaller diameter, defines an opening 31 centered on the axis of rotation intended to be placed in communication with a communication channel of the meter allowing the evacuation of the gas.
  • the distribution element 1 allows the gas to enter and exit alternately measuring chambers (not visible) during its rotational movement about the axis of rotation. To do this, the distribution element 1 comprises, as more particularly visible in FIG.
  • the dispensing element 1 also comprises a recessed central zone 17 (see FIGS. 4b and 5) intended to be placed concentrically above and facing the central opening 31 of the dispensing surface 3.
  • the orifice 13 defined by the drawer 1 is intended to successively put each opening 30 in communication with a measuring chamber for penetrating the gas.
  • the curved zone 14 delimiting a space
  • the interior and central recessed area 17 are intended to successively communicate the measuring chambers with the outlet through the central opening 31.
  • the two planar areas 15, 16 of the drawer 1 successively close the remaining openings.
  • the arrangement further comprises a bearing structure 5 having a portion 50 centered on the axis of rotation, the inside of which is turned towards the element 1 of FIG. distribution in order to supervise the latter.
  • the supporting structure 5 supports the driving crank 2 and is able to be fixed on the upper part of the central block (not shown) of the meter comprising the measurement chambers, by means of fastening lugs 51, 52.
  • the crank 2 comprises a circular plate 23 bearing on its upper surface, a toothed wheel 26 concentric with the axis of rotation, allowing the crank to transmit its rotational movement to a series of gears which actuate themselves a totalizer. volume (not shown).
  • the circular plate 23 On the same side as the toothed wheel 26, the circular plate 23 also carries an eccentric lever 27 extending parallel to the axis of rotation, and intended to cooperate with different levers of the transmission system (not visible) connected to the membranes.
  • the circular plate 23 is placed concentrically on a flat surface of the portion 50 of the supporting structure 5, and cooperates with the upper part of the distribution element 1 through a through opening 53 ( Figure 3a) of this flat surface.
  • rotation guiding means distributed on the lower face of the plate 23, and on the flat surface of the part 50, cooperate together to guide the crank in rotation about the axis.
  • These guide means comprise, in the nonlimiting example shown in the figures, an annular ring 54 on the flat surface, concentric with the axis of rotation, bordering for example the through opening 53, and a corresponding annular groove 28 on the underside of the plate 23 (see Figure 6b).
  • this annular groove 28 is formed by a peripheral rim 29a of the plate 23 extending axially downwardly around the entire periphery of the plate and by a plurality of lugs 29b, 29c (see FIG. 6b). extending axially from the lower face of the plate, uniformly distributed in a circle inside this peripheral rim. Note that some of these pins, referenced 29b are further advantageously provided with a stop 29d. Thus, the crank is snapped onto the supporting structure, and the stops prevent the removal of the crank.
  • the drive means comprise, on the one hand, on the lower face of the plate 23, a rib 22 which extends longitudinally symmetrically with respect to the axis of rotation in a plane orthogonal to this axis of rotation, and other part, on the upper part of the distribution element 1, a groove 18 of complementary shape to receive the rib 22 (see Figure 5).
  • the groove is, for example, formed by the space defined between two walls 18a and 18b integrally molded with the distribution element 1, extending vertically, the two walls being substantially flat, with a central semi-circular portion 18c of to receive a corresponding cylindrical portion 22a of the groove.
  • the rib is delimited at its two ends by two of the lugs 29c serving to guide the crank on the carrier structure in rotation.
  • These two lugs therefore serve here as a stop to prevent movement of the crank parallel to the longitudinal axis of the groove.
  • crank 2 with the various elements that compose it just as the distribution element 1 and the distribution surface 2 are preferably each made in the form of a single piece obtained by molding a plastic material. Thanks to the invention, and more particularly to the geometry and the relative positioning of the different parts, the assembly of the different elements between them is very simple to perform, and easily automated. It suffices to superimpose the various elements above the measuring chambers, starting by positioning the distribution surface, then the distribution element 1 which is simply placed on the surface 2, then the supporting structure, and the crank so that the rib 22 of the crank comes to fit in the corresponding groove 18 through the opening 53 of the carrier structure 5, and the annular ring 54 of the carrier structure comes to fit into the annular groove 28 corresponding under the crank. The lever 27 can then be connected to the rest of the levers of the transmission system connected to the membranes.
  • the various elements are further superimposed so as to achieve a minimum height requirement. This makes it possible to incorporate other devices inside the meter, such as a temperature compensation device.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention relates to a membrane gas meter comprising several measuring chambers, a rotating distribution element (1) rotating about a rotational axis on a distribution surface (3) to permit alternate entry and exit of gas from the measuring chambers, a crank (2) driving the distribution element (1) in rotation synchronised with the movements of the membranes and a support structure (5) with a part (50) centred on the axis of rotation the interior of which is turned in the direction of the distribution element (1) such as to enclose the same. According to the invention, the crank (2) comprises a plate (23) fitted concentrically on a flat surface of the support structure (50), cooperating with an upper part of the distribution element (1) through a through opening (53) in the flat surface. The counter has means (28, 54) for guiding the crank (2) in rotation distributed in the lower face of the plate (23) and on said flat surface and rotational drive means (18, 22) distributed on the lower face of the plate (23) and on the upper part of the distribution element (1). Advantages are simple assembly and small size.

Description

COMPTEUR DE GAZ A MEMBRANES A ENTRAINEMENT DE DISTRIBUTION ROTATIF MEMBRANE GAS METER WITH ROTARY DISTRIBUTION DRIVE
La présente invention concerne le domaine des compteurs de gaz à membranes déformables comprenant plusieurs chambres de mesure, et un élément ou tiroir de distribution monté rotatif autour d'un axe de rotation sur une surface de distribution dans laquelle sont ménagés plusieurs ouvertures qui sont reliées chacune à une chambre de mesure, l'élément de distribution permettant au gaz d'entrer et de sortir alternativement des chambres de mesure au cours de son mouvement de rotation autour de l'axe de rotation.The present invention relates to the field of gas meters with deformable membranes comprising several measuring chambers, and a distribution element or spool mounted rotatably about an axis of rotation on a distribution surface in which are formed several openings which are connected each a measuring chamber, the distribution element allowing the gas to enter and exit alternately measurement chambers during its rotational movement about the axis of rotation.
L'entraînement en rotation de l'élément de distribution est réalisé en synchronisme avec le mouvement des membranes grâce à un système de transmission comprenant un certains nombre de leviers, ainsi qu'une pièce appelée manivelle. Lors des mouvements de translation alternés des membranes, les leviers transforment ces mouvements de translation en un mouvement de rotation imprimé à la manivelle. La manivelle transmet alors son mouvement de rotation d'une part, à l'élément de distribution, et d'autre part, à une série d'engrenages qui actionnent eux-mêmes un totalisateur de volume.The rotational drive of the dispensing element is performed in synchronism with the movement of the membranes through a transmission system comprising a number of levers, and a part called crank. During the alternating translation movements of the membranes, the levers transform these translational movements into a rotational movement printed on the crank. The crank then transmits its rotational movement on the one hand, to the distribution element, and on the other hand, to a series of gears which themselves operate a volume totalizer.
On s'intéresse dans la suite uniquement à la coopération de la manivelle et de l'élément ou tiroir de distribution.We are interested in the following only to the cooperation of the crank and the element or drawer distribution.
Les solutions actuellement utilisées pour guider la manivelle sont basées sur le principe d'un axe vertical de paliers. Une première solution, décrite dans le document EP 0128 838, est représentée sur la figure 1 annexée, qui illustre une coupe partielle verticale montrant le montage et l'entraînement d'un élément de distribution 1 par une manivelle 2. Comme on le voit sur cette figure, l'élément de distribution 1 repose sur une surface de distribution 3 comportant plusieurs ouvertures 30 et 31. Lors de l'entraînement en rotation, la face inférieure 10 du tiroir 1 glisse sur deux couronnes périphériques 32 et 33 de la surface de distribution assurant l'étanchéité. La manivelle 2 comporte un moyeu 20 muni d'un trou borgne monté à pivotement sur un axe fixe 34 engagé dans un alésage axial de la surface de distribution 3. La manivelle peut ainsi tourner autour de l'axe 34 et est entraînée en rotation en synchronisation avec le mouvement des membranes (non visibles), par l'intermédiaire notamment d'un système de leviers partiellement représenté sous la référence 4. Le moyeu 20 de la manivelle est également engagé dans un fourreau 11 solidaire de l'élément de distribution 1 , avec un très léger jeu e, par exemple de 1 /10eme de millimètre. La manivelle 2 et l'élément de distribution 1 sont solidarisés en rotation par la coopération d'un ergot 21 ménagé dans la manivelle et d'une rainure radiale 12 ménagée dans l'élément de distribution 1. Dans cette première solution, c'est donc la manivelle 2 qui positionne l'élément de distribution 1. L'inconvénient majeur de cette solution réside dans le fait que l'axe 34 traverse l'élément de distribution 1 , ce qui impose de prévoir une couronne d'étanchéité additionnelle 35 circulaire, ménagée dans la surface de distribution 3 en regard de l'extrémité inférieure du fourreau 11. Or, cette couronne additionnelle peut générer des fuites internes au compteur, qui affectent ses performances métrologiques, notamment à faible débit. Une deuxième solution connue, décrite notamment dans le document FRThe solutions currently used to guide the crank are based on the principle of a vertical bearing axis. A first solution, described in EP 0128 838, is shown in Figure 1 attached, which illustrates a vertical partial section showing the mounting and driving of a distribution element 1 by a crank 2. As seen on this figure, the distribution element 1 rests on a distribution surface 3 having a plurality of openings 30 and 31. During the rotary drive, the lower face 10 of the slide 1 slides on two peripheral rings 32 and 33 of the surface of distribution ensuring tightness. The crank 2 comprises a hub 20 provided with a blind hole pivotally mounted on a fixed axis 34 engaged in an axial bore of the distribution surface 3. The crank can thus rotate about the axis 34 and is rotated in rotation. synchronization with the movement of the membranes (not visible), in particular through a lever system partially represented under the reference 4. The hub 20 of the crank is also engaged in a sleeve 11 secured to the dispensing element 1, with a very slight clearance e, e.g., 1/10 th of a millimeter. The crank 2 and the distribution element 1 are secured in rotation by the cooperation of a lug 21 formed in the crank and a radial groove 12 formed in the dispensing element 1. In this first solution, it is therefore the crank 2 which positions the dispensing element 1. The major disadvantage of this solution lies in the fact that the axis 34 passes through the distribution element 1, which requires the provision of an additional circular sealing ring 35 , made in the distribution surface 3 facing the lower end of the sleeve 11. However, this additional ring can generate internal leakage meter, which affect its metrological performance, especially low flow. A second known solution, described in particular in the document FR
2 778 981 , est représentée sur la figure 2 annexée. Ici, la manivelle 2 est montée sur une structure porteuse 5 présentant une forme générale de LJ, l'intérieur du LJ étant tourné en direction de I 'élément de distribution (non représenté), de façon à encadrer ce dernier. Plus précisément, la manivelle 2 comporte un plateau circulaire 23, une partie centrale 24 en forme de tube creux s'étendant le long de l'axe de rotation, et un doigt 25 s'étendant parallèlement à l'axe de rotation. Le doigt 25 est destiné à coopérer avec une ouverture pratiquée dans l'élément de distribution (non visible). Pour comprendre le rôle des différents éléments, on pourra se reporter à la description du document FR 2 778 981.2 778 981, is shown in Figure 2 attached. Here, the crank 2 is mounted on a bearing structure 5 having a general shape of LJ, the inside of the LJ being turned towards the dispensing element (not shown), so as to frame the latter. More specifically, the crank 2 comprises a circular plate 23, a central portion 24 in the form of a hollow tube extending along the axis of rotation, and a finger 25 extending parallel to the axis of rotation. The finger 25 is intended to cooperate with an opening made in the dispensing element (not visible). To understand the role of the various elements, reference may be made to the description of the document FR 2 778 981.
Cette seconde solution présente l'intérêt de ne pas nécessiter de couronne d'étanchéité additionnelle puisqu'ici, il n'y a pas d'axe traversant l'élément de distribution. Néanmoins, elle requiert l'utilisation d'un axe de centrage supplémentaire (non visible sur la figure 2) pour positionner l'élément de distribution. Par ailleurs, la manivelle 2 se retrouve dans cette solution placée entre la structure porteuse 5 et l'élément de distribution. Il en résulte que l'assemblage des différentes pièces est relativement compliqué à réaliser puisqu'il nécessite un pré assemblage d'un sous-ensemble comportant notamment la manivelle et le système de leviers précités (non représenté), ce qui rend difficile son automatisation. En outre, l'encombrement en hauteur de ce type de guidage est assez important, ce qui limite la possibilité de rajouter des fonctionnalités telles qu'un dispositif de correction en température.This second solution has the advantage of not requiring additional sealing ring since here there is no axis passing through the distribution element. Nevertheless, it requires the use of an additional centering pin (not visible in Figure 2) to position the dispensing element. Furthermore, the crank 2 is found in this solution placed between the supporting structure 5 and the distribution element. It results that the assembly of the different parts is relatively complicated to achieve since it requires a pre-assembly of a subassembly including the crank and levers aforementioned system (not shown), which makes it difficult to automate. In addition, the height requirement of this type of guidance is quite important, which limits the possibility of adding features such as a temperature correction device.
La présente invention a pour but de pallier aux limitations et inconvénients des deux solutions connues précédemment décrites, en proposant une solution dans laquelle la géométrie de la manivelle et de l'élément de distribution est simplifiée, de façon à améliorer le montage et les performances métrologiques du compteur, et à obtenir un ensemble plus compact par rapport aux solutions de l'art antérieur.The present invention aims to overcome the limitations and disadvantages of the two known solutions described above, by proposing a solution in which the geometry of the crank and the distribution element is simplified, so as to improve the assembly and the metrological performance. counter, and to obtain a more compact assembly compared to the solutions of the prior art.
Ce but est atteint selon l'invention qui a pour objet un compteur de gaz à membranes à entraînement de distribution rotatif comprenant plusieurs chambres de mesure, un élément de distribution monté rotatif autour d'un axe de rotation sur la surface supérieure d'une surface de distribution dans laquelle sont ménagés plusieurs ouvertures qui sont reliées chacune à une chambre de mesure, l'élément de distribution permettant au gaz d'entrer et de sortir alternativement des chambres de mesure au cours de son mouvement de rotation autour de l'axe de rotation, un système de transmission permettant l'entraînement en rotation de l'élément de distribution en synchronisme avec les mouvements des membranes comprenant une manivelle d'entraînement en rotation de l'élément de distribution, et une structure porteuse présentant une partie centrée sur l'axe de rotation dont l'intérieur est tourné en direction de l'élément de distribution de façon à encadrer ce dernier et supportant ladite manivelle d'entraînement, ladite manivelle d'entraînement comprenant un plateau concentrique avec l'axe de rotation, caractérisé en ce que le plateau est posé concentriquement sur une surface plane de ladite partie et coopère avec une partie supérieure de l'élément de distribution au travers d'une ouverture traversante dans ladite surface plane, et en ce que le compteur comporte en outre d'une part, des moyens de guidage en rotation de la manivelle d'entraînement répartis sur la face inférieure du plateau et sur ladite surface plane, et d'autre part des moyens d'entraînement en rotation répartis sur la face inférieure du plateau et sur la partie supérieure de l'élément de distribution. Lesdits moyens de guidage en rotation de la manivelle d'entraînement comportent de préférence une couronne annulaire sur la surface plane, concentrique avec l'axe de rotation, et une rainure annulaire correspondante formée sur la face inférieure du plateau.This object is achieved according to the invention which relates to a rotary distribution drive membrane gas meter comprising a plurality of measurement chambers, a distribution element rotatably mounted about an axis of rotation on the upper surface of a surface. in which there are several openings which are each connected to a measuring chamber, the distribution element allowing the gas to enter and exit alternately measuring chambers during its rotational movement about the axis of measurement. rotation, a transmission system for driving in rotation the distribution element in synchronism with the movements of the membranes comprising a crank drive in rotation of the dispensing element, and a bearing structure having a portion centered on the axis of rotation whose interior is turned towards the distribution element so as to frame the latter and supp carrying said drive crank, said drive crank comprising a plate concentric with the axis of rotation, characterized in that the plate is placed concentrically on a flat surface of said portion and cooperates with an upper part of the element of distribution through a through opening in said planar surface, and in that the counter further comprises, on the one hand, means for guiding the rotation of the driving crank distributed on the lower face of the plate and on said flat surface, and secondly rotational drive means distributed on the lower face of the plate and on the upper part of the distribution element. Said means for rotating the driving crank preferably comprise an annular ring on the flat surface, concentric with the axis of rotation, and a corresponding annular groove formed on the underside of the plate.
Avantageusement, ladite couronne annulaire borde l'ouverture traversante.Advantageously, said annular ring borders the through opening.
La rainure annulaire peut être formée par un rebord périphérique du plateau s'étendant axialement vers le bas sur tout le pourtour du plateau, et par une pluralité d'ergots s'étendant axialement depuis la face inférieure du plateau, lesdits ergots étant uniformément répartis selon un cercle intérieur adit rebord périphérique.The annular groove may be formed by a peripheral rim of the plate extending axially downwardly around the entire periphery of the plate, and by a plurality of lugs extending axially from the lower face of the plate, said lugs being uniformly distributed according to an inner circle adit peripheral rim.
Dans ce cas, certains desdits ergots sont de préférence munis d'une butée permettant d'empêcher le retrait de la manivelle.In this case, some of said pins are preferably provided with a stop to prevent the removal of the crank.
Dans un mode de réalisation possible, lesdits moyens d'entraînement comportent, sur la face inférieure du plateau, une nervure s'étendant longitudinalement symétriquement par rapport à l'axe de rotation selon un plan orthogonal à cet axe de rotation, et sur la partie supérieure de l'élément de distribution, une rainure, de forme complémentaire pour recevoir ladite nervure.In one possible embodiment, said drive means comprise, on the lower face of the plate, a rib extending longitudinally symmetrically with respect to the axis of rotation in a plane orthogonal to this axis of rotation, and on the part upper of the dispensing element, a groove of complementary shape for receiving said rib.
Le plateau peut en outre porter, sur sa surface supérieure, une roue dentée concentrique avec l'axe de rotation, apte à coopérer avec une série d'engrenages actionnant un totalisateur de volume.The plate may further carry, on its upper surface, a toothed wheel concentric with the axis of rotation, adapted to cooperate with a series of gears actuating a volume totalizer.
Le plateau peut également avantageusement porter, sur sa surface supérieure, un levier excentré s'étendant parallèlement à l'axe de rotation, ledit levier étant apte à coopérer avec différents leviers d'un système de transmission relié aux membranes. La manivelle d'entraînement en rotation, et/ou l'élément de distribution, et/ou la surface de distribution, sont de préférence des pièces intégralement moulées en un matériau plastique.The plate may also advantageously carry, on its upper surface, an eccentric lever extending parallel to the axis of rotation, said lever being adapted to cooperate with different levers of a transmission system connected to the membranes. The rotational drive crank, and / or the dispensing member, and / or the dispensing surface are preferably integrally molded parts of a plastic material.
L'invention et les avantages qu'elle procure seront mieux compris au vu de la description suivante d'un mode de réalisation non limitatif de l'invention, faite en référence aux figures annexées, dans lesquelles :The invention and the advantages that it provides will be better understood in view of the following description of a non-limiting embodiment of the invention, with reference to the appended figures, in which:
- la figure 1 illustre partiellement, en coupe, un premier agencement connu d'une manivelle et d'un élément de distribution ;- Figure 1 partially illustrates, in section, a first known arrangement of a crank and a dispensing element;
- la figure 2 illustre, en perspective, un deuxième agencement connu d'une manivelle pour l'entraînement d'un élément de distribution ;- Figure 2 illustrates, in perspective, a second known arrangement of a crank for driving a dispensing element;
- la figure 3a est une perspective coupée vue de dessous d'un agencement de manivelle et d'élément de distribution conforme à la présente invention ;Fig. 3a is a cutaway perspective view from below of a crank and dispenser arrangement according to the present invention;
- la figure 3b est une perspective complète de dessus de l'agencement de la figure 3a ; - la figure 3c est une perspective complète de dessous de l'agencement de la figure 3a ;FIG. 3b is a complete perspective from above of the arrangement of FIG. 3a; Figure 3c is a complete bottom view of the arrangement of Figure 3a;
- les figures 4a et 4b sont des coupes en élévation de l'agencement de la figure 3a, l'une dans le plan contenant l'axe de rotation, l'autre dans un plan vertical ne contenant pas l'axe de rotation ; - la figure 5 est une perspective vue de dessus de l'élément de distribution seul conforme au mode de réalisation non limitatif de l'invention ;- Figures 4a and 4b are sectional elevations of the arrangement of Figure 3a, one in the plane containing the axis of rotation, the other in a vertical plane does not contain the axis of rotation; - Figure 5 is a perspective view of the sole distribution element according to the non-limiting embodiment of the invention;
- les figures 6a et 6b sont des perspectives respectivement de dessus et de dessous de la manivelle seule, conforme au mode de réalisation non limitatif de l'invention. Les figures 1 et 2 ont déjà été décrites précédemment. Pour simplifier, les éléments communs entre l'état de la technique et l'invention portent les mêmes références.- Figures 6a and 6b are perspectives respectively from above and below the crank alone, according to the non-limiting embodiment of the invention. Figures 1 and 2 have already been described above. For simplicity, the elements common between the state of the art and the invention bear the same references.
Un mode de réalisation non limitatif conforme à la présente invention va à présent être décrit en référence à l'ensemble des figures 3a à 6b. Comme particulièrement visible sur les figures 3a-3c et 4a, 4b, un agencement selon l'invention comporte, comme dans le cas de l'art antérieur de la figure 2, un élément ou tiroir 1 de distribution, une surface de distribution 3, et une manivelle 2 d'entraînement en rotation de l'élément 1 de distribution faisant partie d'un système de transmission plus complet (non visible) permettant l'entraînement en rotation de l'élément de distribution en synchronisme avec les mouvements des membranes.A non-limiting embodiment according to the present invention will now be described with reference to all of Figures 3a to 6b. As particularly visible in FIGS. 3a-3c and 4a, 4b, an arrangement according to the invention comprises, as in the case of the prior art of FIG. 2, a distribution element or slide 1, a distribution surface 3, and a rotation crank 2 for driving the distribution element 1 forming part of a more complete transmission system (not visible) allowing the rotational drive of the dispensing element in synchronism with the movements of the membranes.
Comme expliqué précédemment, l'élément de distribution 1 repose classiquement sur la surface supérieure de la surface de distribution 3, et est entraîné en rotation par la manivelle 2 de façon à ce que sa surface inférieure puisse glisser sur deux couronnes 32, 33 (figures 3a et 3c) à bords supérieurs plans de la surface de distribution 3.As explained above, the distribution element 1 is conventionally based on the upper surface of the distribution surface 3, and is rotated by the crank 2 so that its lower surface can slide on two rings 32, 33 (FIGS. 3a and 3c) with planar upper edges of the distribution surface 3.
La couronne circulaire externe 32 de la surface de distribution délimite extérieurement quatre ouvertures 30 ayant chacune la forme d'un quart de secteur de cercle, réparties concentriquement et séparées par des barrettes radiales 36 d'étanchéité. Chaque ouverture 30 est apte à communiquer avec une chambre de mesure correspondante du compteur pour permettre l'admission du gaz dans ladite chambre de mesure. La couronne circulaire 33, concentrique avec la première couronne 32, mais de diamètre inférieur, définit une ouverture 31 centrée sur l'axe de rotation destinée à être mise en communication avec un canal de communication du compteur permettant l'évacuation du gaz. L'élément 1 de distribution permet au gaz d'entrer et de sortir alternativement des chambres de mesure (non visibles) au cours de son mouvement de rotation autour de l'axe de rotation. Pour ce faire, l'élément 1 de distribution comporte, comme plus particulièrement visible sur la figure 5, des secteurs de cercle aménagés de manière à former un orifice 13 et une zone bombée 14 séparés par deux zones planes 15, 16, chaque zone couvrant un angle d'environ 90° . L'élément 1 de distribution comporte également une zone centrale évidée 17 (voir figures 4b et 5) destinée à être placée concentriquement au-dessus et en regard de l'ouverture centrale 31 de la surface de distribution 3. L'orifice 13 défini par le tiroir 1 a pour but de mettre successivement chaque ouverture 30 en communication avec une chambre de mesure pour faire pénétrer le gaz. La zone bombée 14 délimitant un espace intérieur et la zone centrale évidée 17 ont pour but de mettre en communication successivement les chambres de mesure avec la sortie au travers de l'ouverture centrale 31. Les deux zones planes 15, 16 du tiroir 1 obturent successivement les ouvertures restantes. Comme dans le cas de l'art antérieur de la figure 2, l'agencement comporte en outre une structure porteuse 5 présentant une partie 50 centrée sur l'axe de rotation, dont l'intérieur est tourné en direction de l'élément 1 de distribution de façon à encadrer ce dernier. La structure porteuse 5 supporte la manivelle 2 d'entraînement et est apte à être fixée sur la partie supérieure du bloc central (non représenté) du compteur comportant les chambres de mesure, au moyen de pattes de fixation 51 , 52.The outer circular ring 32 of the distribution surface externally defines four openings 30 each having the shape of a quarter sector circle, distributed concentrically and separated by radial sealing strips 36. Each opening 30 is able to communicate with a corresponding measurement chamber of the meter to allow admission of the gas into said measuring chamber. The circular ring 33, concentric with the first ring 32, but of smaller diameter, defines an opening 31 centered on the axis of rotation intended to be placed in communication with a communication channel of the meter allowing the evacuation of the gas. The distribution element 1 allows the gas to enter and exit alternately measuring chambers (not visible) during its rotational movement about the axis of rotation. To do this, the distribution element 1 comprises, as more particularly visible in FIG. 5, circular sectors arranged so as to form an orifice 13 and a convex zone 14 separated by two plane zones 15, 16, each zone covering an angle of about 90 °. The dispensing element 1 also comprises a recessed central zone 17 (see FIGS. 4b and 5) intended to be placed concentrically above and facing the central opening 31 of the dispensing surface 3. The orifice 13 defined by the drawer 1 is intended to successively put each opening 30 in communication with a measuring chamber for penetrating the gas. The curved zone 14 delimiting a space The interior and central recessed area 17 are intended to successively communicate the measuring chambers with the outlet through the central opening 31. The two planar areas 15, 16 of the drawer 1 successively close the remaining openings. As in the case of the prior art of FIG. 2, the arrangement further comprises a bearing structure 5 having a portion 50 centered on the axis of rotation, the inside of which is turned towards the element 1 of FIG. distribution in order to supervise the latter. The supporting structure 5 supports the driving crank 2 and is able to be fixed on the upper part of the central block (not shown) of the meter comprising the measurement chambers, by means of fastening lugs 51, 52.
L'invention diffère cependant de l'art antérieur précité par la géométrie particulière des différents éléments ainsi que par leur positionnement relatif, comme cela va être à présent expliqué. La manivelle 2 comporte un plateau circulaire 23 portant sur sa surface supérieure, une roue dentée 26 concentrique avec l'axe de rotation, permettant à la manivelle de transmettre son mouvement de rotation à une série d'engrenages qui actionnent eux-mêmes un totalisateur de volume (non représentés). Du même côté que la roue dentée 26, le plateau circulaire 23 porte également un levier 27 excentré s'étendant parallèlement à l'axe de rotation, et destiné à coopérer avec différents leviers du système de transmission (non visible) relié aux membranes.The invention, however, differs from the aforementioned prior art by the particular geometry of the various elements as well as by their relative positioning, as will now be explained. The crank 2 comprises a circular plate 23 bearing on its upper surface, a toothed wheel 26 concentric with the axis of rotation, allowing the crank to transmit its rotational movement to a series of gears which actuate themselves a totalizer. volume (not shown). On the same side as the toothed wheel 26, the circular plate 23 also carries an eccentric lever 27 extending parallel to the axis of rotation, and intended to cooperate with different levers of the transmission system (not visible) connected to the membranes.
Selon une caractéristique importante de l'invention, le plateau circulaire 23 est posé concentriquement sur une surface plane de la partie 50 de la structure porteuse 5, et coopère avec la partie supérieure de l'élément 1 de distribution au travers d'une ouverture traversante 53 (figure 3a) de cette surface plane. En outre des moyens de guidage en rotation, répartis sur la face inférieure du plateau 23, et sur la surface plane de la partie 50, coopèrent ensembles pour guider en rotation la manivelle autour de l'axe. Ces moyens de guidage comportent, dans l'exemple non limitatif représenté sur les figures, une couronne annulaire 54 sur la surface plane, concentrique avec l'axe de rotation, bordant par exemple l'ouverture traversante 53, et une rainure annulaire 28 correspondante sur la face inférieure du plateau 23 (voir figure 6b). Dans l'exemple représenté, cette rainure annulaire 28 est formée par un rebord périphérique 29a du plateau 23 s'étendant axialement vers le bas sur tout le pourtour du plateau et par une pluralité d'ergots 29b, 29c (voir figure 6b) s'étendant axialement depuis la face inférieure du plateau, uniformément répartis selon un cercle intérieur à ce rebord périphérique. A noter que certains de ces ergots, référencés 29b sont en outre avantageusement munis d'une butée 29d. Ainsi, la manivelle est encliquetée sur la structure porteuse, et les butées permettent d'éviter le retrait de la manivelle.According to an important characteristic of the invention, the circular plate 23 is placed concentrically on a flat surface of the portion 50 of the supporting structure 5, and cooperates with the upper part of the distribution element 1 through a through opening 53 (Figure 3a) of this flat surface. In addition, rotation guiding means, distributed on the lower face of the plate 23, and on the flat surface of the part 50, cooperate together to guide the crank in rotation about the axis. These guide means comprise, in the nonlimiting example shown in the figures, an annular ring 54 on the flat surface, concentric with the axis of rotation, bordering for example the through opening 53, and a corresponding annular groove 28 on the underside of the plate 23 (see Figure 6b). In the example shown, this annular groove 28 is formed by a peripheral rim 29a of the plate 23 extending axially downwardly around the entire periphery of the plate and by a plurality of lugs 29b, 29c (see FIG. 6b). extending axially from the lower face of the plate, uniformly distributed in a circle inside this peripheral rim. Note that some of these pins, referenced 29b are further advantageously provided with a stop 29d. Thus, the crank is snapped onto the supporting structure, and the stops prevent the removal of the crank.
Les moyens d'entraînement comportent d'une part, sur la face inférieure du plateau 23, une nervure 22 qui s'étend longitudinalement symétriquement par rapport à l'axe de rotation selon un plan orthogonal à cet axe de rotation, et d'autre part, sur la partie supérieure de l'élément 1 de distribution, une rainure 18, de forme complémentaire pour recevoir la nervure 22 (voir figure 5). La rainure est par exemple formée par l'espace délimité entre deux parois 18a et 18b venues de moulage avec l'élément 1 de distribution, s'étendant verticalement, les deux parois étant sensiblement planes, avec une portion centrale 18c semi-circulaire, de façon à recevoir une portion correspondante cylindrique 22a de la rainure.The drive means comprise, on the one hand, on the lower face of the plate 23, a rib 22 which extends longitudinally symmetrically with respect to the axis of rotation in a plane orthogonal to this axis of rotation, and other part, on the upper part of the distribution element 1, a groove 18 of complementary shape to receive the rib 22 (see Figure 5). The groove is, for example, formed by the space defined between two walls 18a and 18b integrally molded with the distribution element 1, extending vertically, the two walls being substantially flat, with a central semi-circular portion 18c of to receive a corresponding cylindrical portion 22a of the groove.
De manière avantageuse, comme visible notamment sur la figure 6b, la nervure est délimitée à ses deux extrémités par deux des ergots 29c servant au guidage en rotation de la manivelle sur la structure porteuse. Ces deux ergots servent donc ici également de butée pour éviter tout déplacement de la manivelle parallèlement à l'axe longitudinal de la rainure.Advantageously, as can be seen in particular in FIG. 6b, the rib is delimited at its two ends by two of the lugs 29c serving to guide the crank on the carrier structure in rotation. These two lugs therefore serve here as a stop to prevent movement of the crank parallel to the longitudinal axis of the groove.
A noter que la manivelle 2 avec les différents éléments qui la composent, tout comme l'élément 1 de distribution et la surface 2 de distribution sont de préférence chacun réalisé sous la forme d'une pièce unique obtenue par moulage d'un matériau plastique. Grâce à l'invention, et plus particulièrement à la géométrie et au positionnement relatif des différentes pièces, l'assemblage des différents éléments entre eux est très simple à effectuer, et facilement automatisable. Il suffit en effet de superposer les différents éléments au-dessus des chambres de mesure, en commençant par positionner la surface de distribution, puis l'élément 1 de distribution qui est simplement posé sur la surface 2, puis la structure porteuse, et la manivelle de telle sorte que la nervure 22 de la manivelle vienne s'insérer dans la rainure 18 correspondante au travers de l'ouverture 53 de la structure porteuse 5, et que la couronne annulaire 54 de la structure porteuse vienne s'insérer dans la rainure annulaire 28 correspondante sous la manivelle. Le levier 27 peut ensuite être relié au reste des leviers du système de transmission connecté aux membranes.Note that the crank 2 with the various elements that compose it, just as the distribution element 1 and the distribution surface 2 are preferably each made in the form of a single piece obtained by molding a plastic material. Thanks to the invention, and more particularly to the geometry and the relative positioning of the different parts, the assembly of the different elements between them is very simple to perform, and easily automated. It suffices to superimpose the various elements above the measuring chambers, starting by positioning the distribution surface, then the distribution element 1 which is simply placed on the surface 2, then the supporting structure, and the crank so that the rib 22 of the crank comes to fit in the corresponding groove 18 through the opening 53 of the carrier structure 5, and the annular ring 54 of the carrier structure comes to fit into the annular groove 28 corresponding under the crank. The lever 27 can then be connected to the rest of the levers of the transmission system connected to the membranes.
Les différents éléments sont en outre superposés de façon à réaliser un encombrement minimum en hauteur. Ceci permet d'incorporer d'autres dispositifs à l'intérieur du compteur, tel qu'un dispositif de compensation de température.The various elements are further superimposed so as to achieve a minimum height requirement. This makes it possible to incorporate other devices inside the meter, such as a temperature compensation device.
Enfin, on remarque que dans la solution présentée, aucun axe ne traverse l'élément 1 de distribution. Ceci permet de s'affranchir de la nécessité d'une couronne centrale d'étanchéité au niveau de la surface de distribution. Finally, we note that in the presented solution, no axis passes through the distribution element 1. This eliminates the need for a central sealing ring at the dispensing surface.

Claims

REVENDICATIONS
1. Compteur de gaz à membranes à entraînement de distribution rotatif comprenant plusieurs chambres de mesure, un élément (1 ) de distribution monté rotatif autour d'un axe de rotation sur la surface supérieure d'une surface (3) de distribution dans laquelle sont ménagés plusieurs ouvertures (30, 31 ) qui sont reliées chacune à une chambre de mesure, l'élément (1 ) de distribution permettant au gaz d'entrer et de sortir alternativement des chambres de mesure au cours de son mouvement de rotation autour de l'axe de rotation, un système de transmission permettant l'entraînement en rotation de l'élément (1 ) de distribution en synchronisme avec les mouvements des membranes comprenant une manivelle (2) d'entraînement en rotation de l'élément (1 ) de distribution, et une structure porteuse (5) présentant une partie (50) centrée sur l'axe de rotation dont l'intérieur est tourné en direction de l'élément (1 ) de distribution de façon à encadrer ce dernier et supportant ladite manivelle (2) d'entraînement, ladite manivelle d'entraînement comprenant un plateau (23) concentrique avec l'axe de rotation, caractérisé en ce que le plateau (23) est posé concentriquement sur une surface plane de ladite partie (50) et coopère avec une partie supérieure de l'élément (1 ) de distribution au travers d'une ouverture traversante (53) dans ladite surface plane, et en ce que le compteur comporte en outre d'une part, des moyens (28, 54) de guidage en rotation de la manivelle (2) d'entraînement répartis sur la face inférieure du plateau (23) et sur ladite surface plane, et d'autre part des moyens (18, 22) d'entraînement en rotation répartis sur la face inférieure du plateau (23) et sur la partie supérieure de l'élément (1 ) de distribution.1. Diaphragm gas meter with rotary distribution drive comprising a plurality of measurement chambers, a distribution element (1) rotatably mounted about an axis of rotation on the upper surface of a distribution surface (3) in which are provided several openings (30, 31) each connected to a measuring chamber, the distribution element (1) allowing the gas to enter and exit alternately measurement chambers during its rotational movement around the chamber. an axis of rotation, a transmission system enabling the rotation element (1) to be rotated in synchronism with the movements of the membranes, comprising a crank (2) for rotating the element (1) of distribution, and a bearing structure (5) having a portion (50) centered on the axis of rotation whose interior is rotated towards the element (1) distribution so as to frame the latter and suppor both said driving crank (2), said driving crank comprising a plate (23) concentric with the axis of rotation, characterized in that the plate (23) is laid concentrically on a flat surface of said portion (50). ) and cooperates with an upper part of the distribution element (1) through a through opening (53) in said flat surface, and in that the counter further comprises, on the one hand, means (28, 54) for guiding the rotation of the drive crank (2) distributed on the lower face of the plate (23) and on said flat surface, and secondly means (18, 22) for driving in rotation distributed on the lower face of the plate (23) and on the upper part of the element (1) distribution.
2. Compteur de gaz à membranes selon la revendication 1 , caractérisé en ce que lesdits moyens (28, 54) de guidage en rotation de la manivelle (2) d'entraînement comportent une couronne annulaire (54) sur la surface plane, concentrique avec l'axe de rotation, et une rainure annulaire (28) correspondante formée sur la face inférieure du plateau (23). 2. Membrane gas meter according to claim 1, characterized in that said means (28, 54) for guiding the rotation of the drive crank (2) comprise an annular ring (54) on the flat surface, concentric with the axis of rotation, and a corresponding annular groove (28) formed on the underside of the plate (23).
3. Compteur de gaz à membranes selon la revendication 2, caractérisé en ce que ladite couronne annulaire (54) borde l'ouverture traversante (53).3. Diaphragm gas meter according to claim 2, characterized in that said annular ring (54) borders the through opening (53).
4. Compteur de gaz à membranes selon l'une quelconque des revendications 2 ou 3, caractérisé en ce que la rainure annulaire (28) est formée par un rebord périphérique (29a) du plateau (23) s'étendant axialement vers le bas sur tout le pourtour du plateau, et par une pluralité d'ergots (29b, 29c) s'étendant axialement depuis la face inférieure du plateau (23), lesdits ergots étant uniformément répartis selon un cercle intérieur adit rebord périphérique (29a).Membrane gas meter according to one of Claims 2 or 3, characterized in that the annular groove (28) is formed by a peripheral flange (29a) of the plate (23) extending axially downwards on all the periphery of the plate, and by a plurality of lugs (29b, 29c) extending axially from the lower face of the plate (23), said lugs being uniformly distributed according to an inner circle adit peripheral rim (29a).
5. Compteur de gaz à membranes selon la revendication 4, caractérisé en ce que certains (29b) desdits ergots sont munis d'une butée (29d) permettant d'empêcher le retrait de la manivelle.5. Membrane gas meter according to claim 4, characterized in that some (29b) of said pins are provided with a stop (29d) to prevent the removal of the crank.
6. Compteur de gaz à membranes selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits moyens (18, 22) d'entraînement comportent, sur la face inférieure du plateau (23), une nervure (22) s'étendant longitudinalement symétriquement par rapport à l'axe de rotation selon un plan orthogonal à cet axe de rotation, et sur la partie supérieure de l'élément (1 ) de distribution, une rainure (18), de forme complémentaire pour recevoir ladite nervure (22).6. Membrane gas meter according to any one of the preceding claims, characterized in that said drive means (18, 22) comprise, on the lower face of the plate (23), a rib (22) extending longitudinally symmetrically with respect to the axis of rotation in a plane orthogonal to this axis of rotation, and on the upper part of the element (1) of distribution, a groove (18) of complementary shape for receiving said rib (22). ).
7. Compteur de gaz à membranes selon l'une quelconque des revendications précédentes, caractérisé en ce que le plateau (23) porte, sur sa surface supérieure, une roue dentée (26) concentrique avec l'axe de rotation, apte à coopérer avec une série d'engrenages actionnant un totalisateur de volume.7. Membrane gas meter according to any one of the preceding claims, characterized in that the plate (23) carries, on its upper surface, a toothed wheel (26) concentric with the axis of rotation, adapted to cooperate with a series of gears operating a volume totalizer.
8. Compteur de gaz à membranes selon l'une quelconque des revendications précédentes, caractérisé en ce que le plateau (23) porte, sur sa surface supérieure, un levier (27) excentré s'étendant parallèlement à l'axe de rotation, ledit levier (27) étant apte à coopérer avec différents leviers d'un système de transmission (4) relié aux membranes. 8. Membrane gas meter according to any one of the preceding claims, characterized in that the plate (23) carries, on its upper surface, an eccentric lever (27) extending parallel to the axis of rotation, said lever (27) being adapted to cooperate with different levers of a transmission system (4) connected to the membranes.
9. Compteur de gaz à membranes selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément (1 ) de distribution comporte des secteurs de cercle aménagés de manière à former un orifice (13) et une zone bombée 14 séparés par deux zones planes (15, 16), et une zone centrale évidée (17).9. Membrane gas meter according to any one of the preceding claims, characterized in that the element (1) distribution comprises circular sectors arranged to form an orifice (13) and a curved zone 14 separated by two planar zones (15, 16) and a hollow central zone (17).
10. Compteur de gaz à membranes selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément (1 ) de distribution est apte à être entraîné en rotation par la manivelle (2) d'entraînement de façon à ce que sa surface inférieure glisse sur deux couronnes (32, 33) à bords supérieurs plans de la surface de distribution.10. Membrane gas meter according to any one of the preceding claims, characterized in that the element (1) distribution is adapted to be rotated by the crank (2) drive so that its lower surface slides on two crowns (32, 33) with upper planar edges of the distribution surface.
11. Compteur de gaz à membranes selon l'une quelconque des revendications précédentes, caractérisé en ce que la manivelle (2) d'entraînement en rotation, et/ou l'élément de distribution, et/ou la surface de distribution, sont des pièces intégralement moulées en un matériau plastique. Diaphragm gas meter according to one of the preceding claims, characterized in that the rotation drive crank (2) and / or the distribution element and / or the distribution surface are parts integrally molded from a plastic material.
PCT/FR2008/051604 2007-09-25 2008-09-09 Membrane gas meter with rotating distribution action WO2009044068A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0757818 2007-09-25
FR0757818A FR2921484B1 (en) 2007-09-25 2007-09-25 GAS COUNTER MEMBRANES WITH ROTARY DISTRIBUTION DRIVE.

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WO2009044068A2 true WO2009044068A2 (en) 2009-04-09
WO2009044068A3 WO2009044068A3 (en) 2009-07-16

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AR (1) AR068259A1 (en)
CL (1) CL2008002849A1 (en)
FR (1) FR2921484B1 (en)
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US247733A (en) * 1881-09-27 foxall
US686773A (en) * 1899-11-18 1901-11-19 John Seymour Valve for gas-meters.
US1583203A (en) * 1921-06-03 1926-05-04 Herbert F Tolhurst Gas meter
FR2778981A1 (en) * 1998-05-20 1999-11-26 Schlumberger Ind Sa Multi-chamber gas meter with improved guide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US247733A (en) * 1881-09-27 foxall
US686773A (en) * 1899-11-18 1901-11-19 John Seymour Valve for gas-meters.
US1583203A (en) * 1921-06-03 1926-05-04 Herbert F Tolhurst Gas meter
FR2778981A1 (en) * 1998-05-20 1999-11-26 Schlumberger Ind Sa Multi-chamber gas meter with improved guide

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Publication number Publication date
FR2921484A1 (en) 2009-03-27
WO2009044068A3 (en) 2009-07-16
FR2921484B1 (en) 2009-11-27
AR068259A1 (en) 2009-11-11
CL2008002849A1 (en) 2009-09-11

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