EP2029973A1 - Device for indicating a physical quantity - Google Patents

Device for indicating a physical quantity

Info

Publication number
EP2029973A1
EP2029973A1 EP07766010A EP07766010A EP2029973A1 EP 2029973 A1 EP2029973 A1 EP 2029973A1 EP 07766010 A EP07766010 A EP 07766010A EP 07766010 A EP07766010 A EP 07766010A EP 2029973 A1 EP2029973 A1 EP 2029973A1
Authority
EP
European Patent Office
Prior art keywords
housing
resin
display
sensor
components
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP07766010A
Other languages
German (de)
French (fr)
Inventor
Fabrice Pin
Philippe Deck
Christian Bleys
Ian Dawson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Taema SA
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Taema SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR0651972A external-priority patent/FR2901874B1/en
Priority claimed from FR0651973A external-priority patent/FR2901875A1/en
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude, Taema SA filed Critical Air Liquide SA
Publication of EP2029973A1 publication Critical patent/EP2029973A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • G01D11/245—Housings for sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/14—Housings

Definitions

  • the present invention relates to a device indicating a physical quantity.
  • the invention finds an advantageous application in the general field of measuring the pressure of fluids, and more particularly of industrial or medical fluids contained in bottles.
  • Indicating devices of any physical size are most often constituted by a housing comprising, on the one hand, a sensor for measuring said physical quantity, and, on the other hand, a display with a value of magnitude. physical measured by the sensor.
  • an object of the invention is to provide an indicator device that would provide a high protection of the components that constitute it, in particular, the sensor and its sensitive area.
  • a device indicating a physical quantity comprising a housing to which is connected a measurement sensor of said physical quantity and in which is disposed a display of a value representative of the physical quantity measured by said measuring sensor, said device comprising components located successively in substantially parallel planes, said components comprising at least: a transparent cover of said housing, said display and said measuring sensor, a holding and protection element such as a resin filling an interior volume of said housing so as to at least partially coat at least two of the internal components in parallel planes.
  • the measurement sensor is protected by the stack of components that separate it from the transparent cover, which puts it safe from shocks, called frontal, exercised perpendicularly to substantially parallel planes.
  • a holding and protective element such as a resin fills an internal volume of said housing.
  • said housing may optionally comprise a connection insert to which is fixed, for example by welding, said measuring sensor.
  • the invention can then provide that said housing is overmoulded on said insert.
  • said housing is overmoulded on said insert.
  • overmolding of the housing is performed prior to welding the sensor onto the insert.
  • the presence of the intermediate insert provides a possibility of additional protection of the sensor if, as provided by the invention, a sensitive area of the measuring sensor is disposed within said insert. It will be seen later that said sensitive area is then protected by the insert against side impacts applied perpendicularly to the insert.
  • the displays among the most used include a display screen of alpha-numeric or graphic characters controlled by an electronic card that converts the analog information provided by the measurement sensor into a digital information able to be displayed on the screen .
  • Liquid crystal displays are a very common example of this type of display.
  • Another optional purpose, independent of the foregoing, sought by the invention is to provide a device indicating a physical quantity that would provide the user with the guarantee that the indication displayed by the device is reliable. This goal is achieved, according to an optional feature
  • said display comprises a screen for displaying alpha-numeric or graphic characters controlled by an electronic card
  • a connection line electrical to said electronic card can be disposed on said screen, said electrical connection being able to break in case of rupture of the display screen.
  • connection line is integrated with the display as well as the display segments. It can also be reported on or behind the screen.
  • the breaking of the electrical connection following the rupture of the screen is detected by the electronic card which then puts the display out of service and / or warns the user by other means. It is then certain that the display provides values of the magnitude only when the connection line is intact, the displayed values can therefore be considered reliable.
  • the device also comprises, between said display and said measurement sensor, the following components: an electronic card for said display and a power supply element for said electronic card,
  • the device comprises a resin filling the interior of the housing so as to at least partially coat all the internal components with the exception of the sensitive zone of the measuring sensor,
  • the device further comprises an audible alarm and an associated resonant cavity,
  • the audible alarm the exit orifice of the audible alarm
  • the resonant cavity the said resonant cavity comprises a baffle
  • the baffle is spared by the resin
  • said resonant cavity is closed by a protective membrane
  • the resin ensures the holding and blocking in position of the components it coats, the resin hermetically seals the body of the housing and in particular at the junction between the housing and the transparent cover,
  • the resin seals the housing and the internal components by obstructing the possible entry point or points in the housing from: an orifice injection or filling for the resin, a junction zone between two parts of the housing (body / lid),
  • the resin closes the stopper of the injection or filling orifice
  • said display comprises a display screen for alphanumeric or graphic characters controlled by an electronic card, an electrical connection line to said electronic card is disposed on said screen, said electrical connection being able to break in case of breaking of the screen
  • said housing comprises a connection insert to which is fixed, for example by welding, said measuring sensor,
  • Figure 1 is a sectional view of a pressure indicating device according to the invention.
  • Figure 2 is a sectional view of the device of Figure 1 filled with a resin.
  • FIG. 3 is a sectional view of the device of Figure 2 showing a sound alarm compartment.
  • FIG. 4 is a detail view in section of the insert of the device of FIGS. 1 to 3.
  • FIG. 5 is a front view of a display of the indicator device of FIGS. 1 to 4 according to a first embodiment.
  • Figure 6 is a front view of a display of the indicator device of Figures 1 to 4 according to a second embodiment.
  • FIG. 7 is a sectional and diagrammatic view of a valve / expander having a pressure indicating device according to FIGS. 1 to 6.
  • the pressure indicating device 10 shown in section in FIG. 1 comprises a housing 100 to which a pressure sensor 200 is connected and in which a display 300 is arranged of the value of the pressure measured by the sensor 200.
  • the pressure sensor 200 has a pressure sensitive zone 210 comprising components, such as strain gauges, capable of supplying an electronic card 310 located between the display 300 and the sensor 200, an electrical signal representative of the measured pressure.
  • This electrical signal is processed by said electronic card 310 so as to allow the display of the value of the measured pressure and / or a remaining duration in duration, for example in digital form on a liquid crystal display of the display 300.
  • the electronic card 310 is powered by a battery 320 placed inside the housing 100 between the display 300 and the sensor 200.
  • the pressure sensor 200 has a thread 220 for connecting the entire pressure indicating device 10 to a pressure reducer or a valve / pressure reducer.
  • the sensor 200 is in the form of a hollow body so that the sensitive area 210 is in communication with the high pressure inlet, for example, the expander or the valve / pressure reducer.
  • the housing 100 consists of a substantially cylindrical body 110 and a substantially circular cover 120 and coaxial with the body 110, and fixed to the body 110 of the housing for example by clipping.
  • the cover 120 is located opposite the display 300.
  • the housing body 110 and the cover 120 can be made of plastic materials provided that the plastic material of the cover 120 is transparent so as to make visible the screen of the housing. 300 in the outside of the housing 100.
  • the pressure indicating device 10 further comprises an audible alarm 400 intended in particular to warn the users of a bottle of fluid incorporating said indicator 10. pressure that the bottle is empty or about to empty.
  • the exit port 410 of the audible alarm 400 opens onto a resonant cavity 420, which has a baffle 421 provided to protect the entire alarm device against possible external damage.
  • the architecture adopted for the pressure indicating device 10, as shown in FIG. 1 for example, shows a stack consisting of the cover 120, the display 300, the electronic card 310, the battery 320 and the battery.
  • sensitive area 210 these elements being located in substantially parallel planes, perpendicular to the axis XX of the body 110 of the housing 100.
  • This arrangement is particularly advantageous because the sensitive area 210 of the sensor is protected from shocks or depressions external that would be applied to the lid 120.
  • the pressure is always contained, without risk of explosion for the user.
  • the pressure information is still available at the sensitive area 210 and can be transmitted for example by radio to a external receiver to the pressure indicator device 10 become out of order.
  • a resin 130 fills the inside of the casing 100 so as to coat all the internal components, with the exception of the sensitive zone 210 and the audible alarm 400 which are spared, as show it respectively figures 2 and 3.
  • the resin may be injected into the casing 100 through a filling orifice 140 visible in FIG. 2, a flange 150 may be provided on the body 110 of the casing to retain the resin which may itself serve as a stopper in order to close the orifice 140 at the end of the filling.
  • Figure 2 shows more particularly that the resin filling is preferably carried out while the housing is inclined, in order to evacuate any bubbles that would form in front of the display 300.
  • the injected resin can have many functions or advantages: - It can block all the internal components which are thus perfectly maintained in position and can not acquire any game,
  • the resin may be urethane, polyurethane or transparent epoxy type or the like.
  • Figure 4 is a detail view showing that the pressure sensor 200 is connected to the body 110 of the housing 100 by means of an insert 500 to which the sensor 200 is welded.
  • the insert 500 is metal and the body 110 of the plastic material case is overmolded on this insert.
  • a groove 510 is provided on the periphery of the insert 500 to cooperate with a rib 111 formed during overmolding on the body 110 and ensure the immobilization in translation of the insert.
  • an outer profile 520 is given to the insert 500 so as to prevent rotation of the insert about its axis.
  • This profile is, for example, hexagonal.
  • This profile can also be used to screw or unscrew the entire pressure indicating device 10 on a pressure reducer or valve / pressure reducer by means of a simple key.
  • FIG. 4 shows a particularly advantageous assembly configuration in which the sensitive zone 210 of the sensor
  • FIGS. 5 and 6 show a liquid crystal display 300 equipped with a so-called integrity line, intended to provide reliable information as to the reliability of the displayed pressure indications, in the event of deterioration of the screen glass of the screen. display.
  • the integrity line of FIG. 5 consists of a line 330 of single connection to the electronic card disposed on the screen of the display 300, this line traversing the entire screen in all its directions so as to be able to break the connection. in case of breakage of the screen itself.
  • the line 330 constitutes a switch between the contacts A and B whose state is continuously monitored by the electronic card. If the equivalent switch is closed, line 330 is not interrupted and the screen is considered intact, so its indications are considered reliable. On the other hand, in the event of rupture of the screen glass causing a break in line 330, the open state of the equivalent switch is detected by the electronic card and the display 300 is turned off.
  • a reliable value of the pressure can always be provided by a radio channel for example, since the disabling of the display has no influence in general on the operation of the pressure sensor 200 itself.
  • the integrity line 340 consists of elementary lines 341, 342 connected by the electronic card.
  • FIG. 7 illustrates an application of the invention to a valve / expander in which the pressure indicating device 10 opens into a portion 600 of high pressure circuit upstream of a valve 610 for expansion and the low pressure portion 620 of the valve. /regulator.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The invention relates to a device for indicating (10) a physical quantity, said device comprising a housing (100) to which a sensor (200) for measuring the physical quantity is connected and which contains a display (300) for displaying a value representing the physical quantity measured by the measuring sensor. Said device comprises components which are successively arranged in essentially parallel planes, the components consisting of at least a transparent cover (120) for the housing (100), the display (300), and the measuring sensor (200). The invention is characterised in that a maintenance and protection element such as a resin (130) fills an inside space of the housing (100) in such a way as to coat at least two of the inner components (100, 120, 300, 310, 320) located in parallel planes.

Description

Dispositif indicateur d'une grandeur physique Device indicating a physical quantity
La présente invention concerne un dispositif indicateur d'une grandeur physique.The present invention relates to a device indicating a physical quantity.
L'invention trouve une application avantageuse dans le domaine général de la mesure de la pression de fluides, et plus spécialement de fluides industriels ou médicaux contenus dans des bouteilles.The invention finds an advantageous application in the general field of measuring the pressure of fluids, and more particularly of industrial or medical fluids contained in bottles.
Les dispositifs indicateurs d'une grandeur physique quelconque sont le plus souvent constitués d'un boîtier comprenant, d'une part, un capteur de mesure de ladite grandeur physique, et, d'autre part, un afficheur d'une valeur de la grandeur physique mesurée par le capteur de mesure.Indicating devices of any physical size are most often constituted by a housing comprising, on the one hand, a sensor for measuring said physical quantity, and, on the other hand, a display with a value of magnitude. physical measured by the sensor.
Avec les dispositifs indicateurs connus, se pose très souvent le problème de leur fiabilité vis-à-vis des chocs extérieurs. Cette question est particulièrement sensible lorsqu'il s'agit de grandeur ayant un fort caractère sécuritaire, comme la pression d'un fluide contenu dans une bouteille.With the known indicator devices, the problem of their reliability vis-à-vis external shocks is very often raised. This question is particularly sensitive when it comes to size having a strong security character, such as the pressure of a fluid contained in a bottle.
Aussi, un but recherché par l'invention est de proposer un dispositif indicateur qui permettrait d'obtenir une protection élevée des composants qui le constituent, en particulier, le capteur de mesure et sa zone sensible. Ce but est atteint, conformément à l'invention, grâce à un dispositif indicateur d'une grandeur physique, comprenant un boîtier auquel est raccordé un capteur de mesure de ladite grandeur physique et dans lequel est disposé un afficheur d'une valeur représentative de la grandeur physique mesurée par ledit capteur de mesure, ledit dispositif comprenant des composants situés successivement dans des plans sensiblement parallèles, lesdits composants comprenant au moins : un couvercle transparent dudit boîtier, ledit afficheur et ledit capteur de mesure, un élément de maintien et de protection tel qu'une résine remplissant un volume intérieur dudit boîtier de façon à enrober au moins partiellement au moins deux des composants internes situés dans des plans parallèles.Also, an object of the invention is to provide an indicator device that would provide a high protection of the components that constitute it, in particular, the sensor and its sensitive area. This object is achieved, according to the invention, by means of a device indicating a physical quantity, comprising a housing to which is connected a measurement sensor of said physical quantity and in which is disposed a display of a value representative of the physical quantity measured by said measuring sensor, said device comprising components located successively in substantially parallel planes, said components comprising at least: a transparent cover of said housing, said display and said measuring sensor, a holding and protection element such as a resin filling an interior volume of said housing so as to at least partially coat at least two of the internal components in parallel planes.
Ainsi, on comprend que, dans cette architecture, le capteur de mesure se trouve protégé par l'empilement des composants qui le séparent du couvercle transparent, ce qui le met à l'abri de chocs, dits frontaux, exercés perpendiculairement aux plans sensiblement parallèles.Thus, it is understood that, in this architecture, the measurement sensor is protected by the stack of components that separate it from the transparent cover, which puts it safe from shocks, called frontal, exercised perpendicularly to substantially parallel planes.
Cette protection du capteur de mesure contre les chocs frontaux est encore renforcée du fait que, selon l'invention, un élément de maintien et de protection tel qu'une résine remplit un volume intérieur dudit boîtier.This protection of the measuring sensor against frontal impacts is further enhanced by the fact that, according to the invention, a holding and protective element such as a resin fills an internal volume of said housing.
On obtient de cette manière non seulement une meilleure protection du capteur de mesure lui-même, mais également celle des composants internes au boîtier. L'injection de résine dans le boîtier présente bien d'autres avantages encore comme cela sera expliqué plus loin. Un autre problème indépendant connu concerne la fiabilisation du raccordement du capteur de mesure au boîtier du dispositif indicateur.In this way, not only is there a better protection of the measuring sensor itself, but also of the internal components of the housing. The injection of resin into the housing has many other advantages as will be explained later. Another known independent problem concerns the reliability of the connection of the measuring sensor to the housing of the indicating device.
Les solutions usuelles actuellement utilisées pour raccorder le capteur au boîtier sont le vissage, le collage, le clipsage ou sertissage et l'usage d'un contre-écrou. Cependant, ces solutions connues présentent toutes des limites en terme de fiabilité. En effet, le vissage est sensible aux vibrations et présente une tenue mécanique faible s'il est réalisé avec des matériaux plastiques, le collage a une mauvaise tenue dans le temps et aux solvants, le clipsage ou le sertissage présentent également une tenue mécanique faible et une mauvaise étanchéité, les contre-écrous sont très encombrants et peuvent se dévisser sous l'effet des vibrations.The usual solutions currently used to connect the sensor to the housing are screwing, gluing, clipping or crimping and the use of a locknut. However, these known solutions all have limitations in terms of reliability. Indeed, the screw is sensitive to vibrations and has a low mechanical strength if it is made of plastic materials, the bonding has poor durability and solvents, clipping or crimping also have a low mechanical strength and poor sealing, the lock nuts are very bulky and can unscrew due to vibration.
Une solution optionnelle, proposée de façon additionnelle ou indépendante par l'invention pour résoudre ce problème additionnel de fiabilité consiste en ce que ledit boîtier peut comprendre éventuellement un insert de raccordement auquel est fixé, par exemple par soudage, ledit capteur de mesure.An optional solution, proposed additionally or independently by the invention to solve this additional problem of reliability is that said housing may optionally comprise a connection insert to which is fixed, for example by welding, said measuring sensor.
Dans ce contexte, l'invention peut prévoir alors que ledit boîtier est surmoulé sur ledit insert. On notera d'ailleurs que dans un montage traditionnel avec un boîtier plastique, le surmoulage du boîtier sur le capteur est impossible du fait que le capteur ne peut en général être chauffé au risque de détériorer la zone sensible du capteur.In this context, the invention can then provide that said housing is overmoulded on said insert. Note also that in a traditional assembly with a plastic housing, overmoulding of the housing on the sensor is impossible because the sensor can generally be heated at the risk of damaging the sensitive area of the sensor.
De préférence, le surmoulage du boîtier est réalisé avant le soudage du capteur sur l'insert. La présence de l'insert intermédiaire offre une possibilité de protection supplémentaire du capteur si, comme le prévoit l'invention, une zone sensible du capteur de mesure est disposée à l'intérieur dudit insert. On verra plus loin en effet que ladite zone sensible se trouve alors protégée par l'insert contre les chocs latéraux appliqués perpendiculairement à l'insert.Preferably, overmolding of the housing is performed prior to welding the sensor onto the insert. The presence of the intermediate insert provides a possibility of additional protection of the sensor if, as provided by the invention, a sensitive area of the measuring sensor is disposed within said insert. It will be seen later that said sensitive area is then protected by the insert against side impacts applied perpendicularly to the insert.
Actuellement, les afficheurs parmi les plus utilisés comprennent un écran d'affichage de caractères alpha-numériques ou graphiques commandé par une carte électronique qui convertit l'information analogique fournie par le capteur de mesure en une information numérique apte à être affichée sur l'écran. Les écrans à cristaux liquides sont un exemple très répandu de ce type d'afficheurs.Currently, the displays among the most used include a display screen of alpha-numeric or graphic characters controlled by an electronic card that converts the analog information provided by the measurement sensor into a digital information able to be displayed on the screen . Liquid crystal displays are a very common example of this type of display.
Cependant, en cas de choc, il peut se produire que le verre de l'écran d'affichage se casse et rompe tout ou partie des connexions alimentant les segments dont est constitué chaque caractère de l'afficheur. L'affichage disparaît soit totalement, soit partiellement en affichant alors des signes incompréhensibles ou même une valeur de mesure fausse. Dans le cas de dispositifs indicateurs de pression de bouteilles de fluides, ce manque d'information, ou pire une information fausse, peut mettre en cause gravement la sécurité. Par exemple, si l'affichage correct est « 200 bar » et que les caractèresHowever, in case of shock, it may happen that the glass of the display screen breaks and breaks all or part of the connections supplying the segments of which each character of the display is constituted. The display disappears either completely, or partially, then displaying incomprehensible signs or even a wrong measurement value. In the case of fluid bottle pressure indicating devices, this lack of information, or worse, false information can seriously jeopardize safety. For example, if the correct display is "200 bar" and the characters
« 20 » disparaissent, seul le « 0 » restant affiché, l'utilisateur peut croire à l'absence de pression alors qu'une pression de 200 bar existe effectivement et constitue un danger potentiel. Dans d'autres applications, c'est au contraire l'absence de gaz, alors que l'afficheur indique une pression non nulle, qui est dangereuse."20" disappear, only the "0" remaining displayed, the user can believe the absence of pressure when a pressure of 200 bar actually exists and is a potential danger. In other applications, it is on the contrary the absence of gas, while the display indicates a non-zero pressure, which is dangerous.
Aussi, encore un autre but optionnel, indépendant des précédents, recherché par l'invention est de proposer un dispositif indicateur d'une grandeur physique qui permettrait de fournir à l'utilisateur la garantie que l'indication affichée par le dispositif est fiable. Ce but est atteint, conformément à une particularité optionnelleAlso, another optional purpose, independent of the foregoing, sought by the invention is to provide a device indicating a physical quantity that would provide the user with the guarantee that the indication displayed by the device is reliable. This goal is achieved, according to an optional feature
(additionnelle ou indépendante de l'invention), du fait que ledit afficheur comprenant un écran d'affichage de caractères alpha-numériques ou graphiques commandé par une carte électronique, une ligne de connexion électrique à ladite carte électronique peut être disposée sur ledit écran, ladite connexion électrique étant apte à se rompre en cas de rupture de l'écran d'affichage.(additional or independent of the invention), since said display comprises a screen for displaying alpha-numeric or graphic characters controlled by an electronic card, a connection line electrical to said electronic card can be disposed on said screen, said electrical connection being able to break in case of rupture of the display screen.
De manière pratique, la ligne de connexion est intégrée à l'afficheur au même titre que les segments d'affichage. Elle peut cependant également être rapportée sur ou derrière l'écran.Conveniently, the connection line is integrated with the display as well as the display segments. It can also be reported on or behind the screen.
Comme on le verra en détail plus loin, la rupture de la connexion électrique suite à la rupture de l'écran est détectée par la carte électronique qui met alors l'afficheur hors service et/ou prévient l'utilisateur par d'autres moyens. On est alors certain que l'afficheur ne fournit de valeurs de la grandeur que lorsque la ligne de connexion est intègre, les valeurs affichées peuvent donc être considérées comme fiables.As will be seen in detail below, the breaking of the electrical connection following the rupture of the screen is detected by the electronic card which then puts the display out of service and / or warns the user by other means. It is then certain that the display provides values of the magnitude only when the connection line is intact, the displayed values can therefore be considered reliable.
L'invention peut comprendre l'une ou plusieurs des particularités suivantes : - le dispositif comprend également, entre ledit afficheur et ledit capteur de mesure, les composants suivants : une carte électronique pour ledit afficheur et un élément d'alimentation pour ladite carte électronique,The invention may comprise one or more of the following features: the device also comprises, between said display and said measurement sensor, the following components: an electronic card for said display and a power supply element for said electronic card,
- le dispositif comprend une résine remplissant l'intérieur du boîtier de manière à enrober au moins partiellement tous les composants internes à l'exception de la zone sensible du capteur de mesure,the device comprises a resin filling the interior of the housing so as to at least partially coat all the internal components with the exception of the sensitive zone of the measuring sensor,
- le dispositif comprend en outre une alarme sonore et une cavité résonnante associée,the device further comprises an audible alarm and an associated resonant cavity,
- l'un au moins des éléments suivants est épargné par la résine : l'alarme sonore, l'orifice de sortie de l'alarme sonore, la cavité résonnante, - ladite cavité résonnante comporte une chicane,at least one of the following elements is spared by the resin: the audible alarm, the exit orifice of the audible alarm, the resonant cavity, the said resonant cavity comprises a baffle,
- la chicane est épargnée par la résine,the baffle is spared by the resin,
- ladite cavité résonnante est fermée par une membrane de protection,said resonant cavity is closed by a protective membrane,
- la résine assure le maintien et le blocage en position des composants qu'elle enrobe, - la résine scelle hermétiquement le corps du boîtier et notamment au niveau de la jonction entre le boîtier et le couvercle transparent,the resin ensures the holding and blocking in position of the components it coats, the resin hermetically seals the body of the housing and in particular at the junction between the housing and the transparent cover,
- la résine assure l'étanchéité du boîtier et des composants internes en obstruant le ou les points d'entrée possibles dans le boîtier parmi : un orifice d'injection ou de remplissage pour la résine, une zone de jonction ente deux parties du boîtier (corps/couvercle),the resin seals the housing and the internal components by obstructing the possible entry point or points in the housing from: an orifice injection or filling for the resin, a junction zone between two parts of the housing (body / lid),
- la résine ferme le bouchon de l'orifice d'injection ou remplissage,the resin closes the stopper of the injection or filling orifice,
- ledit afficheur comprend un écran d'affichage de caractères alpha- numériques ou graphiques commandé par une carte électronique, une ligne de connexion électrique à ladite carte électronique est disposée sur ledit écran, ladite connexion électrique étant apte à se rompre en cas de rupture de l'écran,said display comprises a display screen for alphanumeric or graphic characters controlled by an electronic card, an electrical connection line to said electronic card is disposed on said screen, said electrical connection being able to break in case of breaking of the screen
- ledit boîtier comprend un insert de raccordement auquel est fixé, par exemple par soudage, ledit capteur de mesure,said housing comprises a connection insert to which is fixed, for example by welding, said measuring sensor,
La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée.The following description with reference to the accompanying drawings, given by way of non-limiting examples will make it clear what the invention consists of and how it can be achieved.
La figure 1 est une vue en coupe d'un dispositif indicateur de pression conforme à l'invention.Figure 1 is a sectional view of a pressure indicating device according to the invention.
La figure 2 est une vue en coupe du dispositif de la figure 1 rempli d'une résine.Figure 2 is a sectional view of the device of Figure 1 filled with a resin.
La figure 3 est une vue en coupe du dispositif de la figure 2 montrant un compartiment d'alarme sonore. La figure 4 est une vue de détail en coupe de l'insert du dispositif des figures 1 à 3.Figure 3 is a sectional view of the device of Figure 2 showing a sound alarm compartment. FIG. 4 is a detail view in section of the insert of the device of FIGS. 1 to 3.
La figure 5 est une vue de face d'un afficheur du dispositif indicateur des figures 1 à 4 selon un premier mode de réalisation.FIG. 5 is a front view of a display of the indicator device of FIGS. 1 to 4 according to a first embodiment.
La figure 6 est une vue de face d'un afficheur du dispositif indicateur des figures 1 à 4 selon un second mode de réalisation.Figure 6 is a front view of a display of the indicator device of Figures 1 to 4 according to a second embodiment.
La figure 7 est une vue en coupe et schématique d'un robinet/détendeur comportant un dispositif indicateur de pression selon les figures 1 à 6.FIG. 7 is a sectional and diagrammatic view of a valve / expander having a pressure indicating device according to FIGS. 1 to 6.
Dans la suite de la description, on se limitera pour des raisons de clarté de la présentation au cas d'un dispositif indicateur de pression, tel que ceux qui équipent les détendeurs et robinets/détendeurs des bouteilles de fluides industriels ou médicaux. Mais il est toutefois bien entendu que l'invention n'est pas limitée à ce type unique d'indicateur et qu'elle s'étend à des indicateurs d'autres grandeurs physiques, notamment la température, souvent associée à la pression dans le domaine des fluides.In the remainder of the description, it will be limited for the sake of clarity of the presentation in the case of a pressure indicator device, such as those that equip the regulators and valves / regulators cylinders of industrial or medical fluids. However, it is understood that the invention is not limited to this single type of indicator and that it extends to indicators other physical quantities, including temperature, often associated with pressure in the field of fluids.
Le dispositif indicateur 10 de pression représenté en coupe sur la figure 1 comprend un boîtier 100 auquel est raccordé un capteur 200 de pression et dans lequel est disposé un afficheur 300 de la valeur de la pression mesurée par le capteur 200.The pressure indicating device 10 shown in section in FIG. 1 comprises a housing 100 to which a pressure sensor 200 is connected and in which a display 300 is arranged of the value of the pressure measured by the sensor 200.
Dans l'exemple de réalisation de la figure 1 , le capteur 200 de pression présente une zone 210 sensible à la pression comportant des composants, tels que des jauges de contrainte, aptes à fournir à une carte électronique 310, située entre l'afficheur 300 et le capteur 200, un signal électrique représentatif de la pression mesurée. Ce signal électrique est traité par ladite carte électronique 310 de manière à permettre l'affichage de la valeur de la pression mesurée et/ou d'une autonomie restante en durée, par exemple sous forme numérique sur un écran à cristaux liquides de l'afficheur 300. La carte électronique 310 est alimentée par une pile 320 placée à l'intérieur du boîtier 100 entre l'afficheur 300 et le capteur 200.In the embodiment of FIG. 1, the pressure sensor 200 has a pressure sensitive zone 210 comprising components, such as strain gauges, capable of supplying an electronic card 310 located between the display 300 and the sensor 200, an electrical signal representative of the measured pressure. This electrical signal is processed by said electronic card 310 so as to allow the display of the value of the measured pressure and / or a remaining duration in duration, for example in digital form on a liquid crystal display of the display 300. The electronic card 310 is powered by a battery 320 placed inside the housing 100 between the display 300 and the sensor 200.
Le capteur 200 de pression comporte un filetage 220 destiné à raccorder l'ensemble du dispositif indicateur 10 de pression à un détendeur ou à un robinet/détendeur. Le capteur 200 se présente sous la forme d'un corps creux de sorte que la zone sensible 210 soit en communication avec l'entrée haute pression, par exemple, du détendeur ou du robinet/détendeur.The pressure sensor 200 has a thread 220 for connecting the entire pressure indicating device 10 to a pressure reducer or a valve / pressure reducer. The sensor 200 is in the form of a hollow body so that the sensitive area 210 is in communication with the high pressure inlet, for example, the expander or the valve / pressure reducer.
Comme l'indique la figure 1 , le boîtier 100 est constitué d'un corps 110 sensiblement cylindrique et d'un couvercle 120 sensiblement circulaire et coaxial au corps 110, et fixé au corps 110 du boîtier par exemple par clipsage. Le couvercle 120 est situé en regard de l'afficheur 300. Le corps 110 de boîtier ainsi que le couvercle 120 peuvent être réalisés en matériaux plastiques à la condition que le matériau plastique du couvercle 120 soit transparent afin de rendre visible l'écran de l'afficheur 300 de l'extérieur du boîtier 100. Sur la figure 3, on peut voir que le dispositif indicateur 10 de pression comporte en outre une alarme sonore 400 destinée notamment à avertir les utilisateurs d'une bouteille de fluide incorporant ledit indicateur 10 de pression que la bouteille est vide ou sur le point de se vider. L'orifice 410 de sortie de l'alarme sonore 400 débouche sur une cavité résonnante 420, laquelle présente une chicane 421 prévue pour protéger l'ensemble du dispositif d'alarme contre d'éventuelles atteintes extérieures. Une membrane 422 de protection contre l'humidité, mais transparente aux sons, referme la cavité résonnante 420.As shown in Figure 1, the housing 100 consists of a substantially cylindrical body 110 and a substantially circular cover 120 and coaxial with the body 110, and fixed to the body 110 of the housing for example by clipping. The cover 120 is located opposite the display 300. The housing body 110 and the cover 120 can be made of plastic materials provided that the plastic material of the cover 120 is transparent so as to make visible the screen of the housing. 300 in the outside of the housing 100. In FIG. 3, it can be seen that the pressure indicating device 10 further comprises an audible alarm 400 intended in particular to warn the users of a bottle of fluid incorporating said indicator 10. pressure that the bottle is empty or about to empty. The exit port 410 of the audible alarm 400 opens onto a resonant cavity 420, which has a baffle 421 provided to protect the entire alarm device against possible external damage. A membrane 422 for protection against moisture, but transparent to the sounds, closes the resonant cavity 420.
L'architecture retenue pour le dispositif indicateur 10 de pression, telle que représentée à la figure 1 par exemple, fait apparaître un empilement constitué du couvercle 120, de l'afficheur 300, de la carte électronique 310, de la pile 320 et de la zone sensible 210, ces éléments étant situés dans des plans sensiblement parallèles, perpendiculaires à l'axe X-X du corps 110 du boîtier 100. Cette disposition est particulièrement avantageuse du fait que la zone sensible 210 du capteur se trouve protégée de chocs ou d'enfoncements extérieurs qui seraient appliqués au couvercle 120. La pression est ainsi toujours contenue, sans risque d'explosion pour l'utilisateur. D'autre part, même si l'un des constituants de l'ensemble d'affichage est détérioré ou détruit, l'information de pression reste toujours disponible au niveau de la zone sensible 210 et peut être transmise par exemple par voie radio à un récepteur extérieur au dispositif indicateur 10 de pression devenu hors d'usage. Selon le mode de réalisation des figures 2 et 3, une résine 130 remplit l'intérieur du boîtier 100 de manière à enrober tous les composants internes, à l'exception de la zone sensible 210 et l'alarme sonore 400 qui sont épargnées, comme le montrent respectivement les figures 2 et 3.The architecture adopted for the pressure indicating device 10, as shown in FIG. 1 for example, shows a stack consisting of the cover 120, the display 300, the electronic card 310, the battery 320 and the battery. sensitive area 210, these elements being located in substantially parallel planes, perpendicular to the axis XX of the body 110 of the housing 100. This arrangement is particularly advantageous because the sensitive area 210 of the sensor is protected from shocks or depressions external that would be applied to the lid 120. The pressure is always contained, without risk of explosion for the user. On the other hand, even if one of the components of the display assembly is damaged or destroyed, the pressure information is still available at the sensitive area 210 and can be transmitted for example by radio to a external receiver to the pressure indicator device 10 become out of order. According to the embodiment of FIGS. 2 and 3, a resin 130 fills the inside of the casing 100 so as to coat all the internal components, with the exception of the sensitive zone 210 and the audible alarm 400 which are spared, as show it respectively figures 2 and 3.
La résine peut être injectée dans le boîtier 100 à travers un orifice 140 de remplissage visible sur la figure 2, un rebord 150 peut être ménagé sur le corps 110 du boîtier pour retenir la résine qui pourra elle-même faire office de bouchon afin d'obturer l'orifice 140 à la fin du remplissage.The resin may be injected into the casing 100 through a filling orifice 140 visible in FIG. 2, a flange 150 may be provided on the body 110 of the casing to retain the resin which may itself serve as a stopper in order to close the orifice 140 at the end of the filling.
La figure 2 montre plus particulièrement que le remplissage de résine s'effectue de préférence alors que le boîtier est incliné, ceci afin d'évacuer d'éventuelles bulles qui se formeraient devant l'afficheur 300.Figure 2 shows more particularly that the resin filling is preferably carried out while the housing is inclined, in order to evacuate any bubbles that would form in front of the display 300.
La résine injectée peut présenter des nombreuses fonctions ou avantages : - elle peut bloquer tous les composants internes qui se trouvent donc parfaitement maintenus en position et ne peuvent acquérir aucun jeu,The injected resin can have many functions or advantages: - It can block all the internal components which are thus perfectly maintained in position and can not acquire any game,
- elle peut sceller hermétiquement le corps 110 du boîtier et le couvercle 120 sans avoir recours à un joint, - elle peut assurer l'étanchéité des composants internes au boîtier 100 en obstruant les seuls points d'entrée possibles qui sont l'orifice 140 d'injection et la zone périphérique de clipsage du couvercle 120 sur le corps 110 de boîtier,it can hermetically seal the body 110 of the casing and the cover 120 without resorting to a seal, it can seal the internal components of the casing 100 by blocking the only possible points of entry which are the aperture 140 injection and the peripheral area of clipping of the cover 120 on the housing body 110,
- elle augmente notablement la tenue aux chocs des composants, en particulier le verre de l'écran de l'afficheur 300, fragile par nature.it significantly increases the impact resistance of the components, in particular the glass of the screen of the display 300, fragile in nature.
La résine peut être de type uréthane, polyuréthane ou époxy transparente ou analogue.The resin may be urethane, polyurethane or transparent epoxy type or the like.
La figure 4 est une vue de détail qui montre que le capteur 200 de pression est raccordé au corps 110 du boîtier 100 au moyen d'un insert 500 auquel le capteur 200 est soudé. L'insert 500 est métallique et le corps 110 du boîtier en matériau plastique est surmoulé sur cet insert.Figure 4 is a detail view showing that the pressure sensor 200 is connected to the body 110 of the housing 100 by means of an insert 500 to which the sensor 200 is welded. The insert 500 is metal and the body 110 of the plastic material case is overmolded on this insert.
Une gorge 510 est prévue sur le pourtour de l'insert 500 pour coopérer avec une nervure 111 formée lors du surmoulage sur le corps 110 et assurer l'immobilisation en translation de l'insert. De même, un profil extérieur 520 est donné à l'insert 500 de manière à empêcher toute rotation de l'insert autour de son axe. Ce profil est, par exemple, hexagonal. Ce profil peut aussi servir pour visser ou dévisser l'ensemble du dispositif indicateur 10 de pression sur un détendeur ou robinet/détendeur au moyen d'une simple clé. Enfin, la figure 4 montre une configuration d'assemblage particulièrement avantageuse dans laquelle la zone sensible 210 du capteurA groove 510 is provided on the periphery of the insert 500 to cooperate with a rib 111 formed during overmolding on the body 110 and ensure the immobilization in translation of the insert. Similarly, an outer profile 520 is given to the insert 500 so as to prevent rotation of the insert about its axis. This profile is, for example, hexagonal. This profile can also be used to screw or unscrew the entire pressure indicating device 10 on a pressure reducer or valve / pressure reducer by means of a simple key. Finally, FIG. 4 shows a particularly advantageous assembly configuration in which the sensitive zone 210 of the sensor
200 est disposée à l'intérieur de l'insert 500, c'est-à-dire en retrait du bord 501 de l'insert, et se trouve donc protégée de chocs latéraux perpendiculaires à l'axe X du boîtier 100, représentés par la flèche F. Ce type de montage avec un insert intermédiaire offre également d'autres avantages :200 is disposed inside the insert 500, that is to say recessed from the edge 501 of the insert, and is therefore protected from side impacts perpendicular to the axis X of the housing 100, represented by the arrow F. This type of assembly with an intermediate insert also offers other advantages:
- assemblage de pièces individuelles très simple,- assembly of individual parts very simple,
- excellente tenue mécanique, - étanchéité parfaite sans pièce dédiée,- excellent mechanical strength, - perfect seal without a dedicated room,
- facilité d'adapter le capteur 200 en termes de diamètre et de filetage sans changer l'insert 500.- Easy to adapt the sensor 200 in terms of diameter and thread without changing the insert 500.
Les figures 5 et 6 montrent un afficheur 300 à cristaux liquides équipé d'une ligne dite d'intégrité, destinée à fournir une information sure quant à la fiabilité des indications de pression affichées, en cas de détérioration du verre de l'écran de l'afficheur.FIGS. 5 and 6 show a liquid crystal display 300 equipped with a so-called integrity line, intended to provide reliable information as to the reliability of the displayed pressure indications, in the event of deterioration of the screen glass of the screen. display.
La ligne d'intégrité de la figure 5 consiste en une ligne 330 de connexion unique à la carte électronique disposée sur l'écran de l'afficheur 300, cette ligne traversant tout l'écran dans toutes ses directions de manière à pouvoir rompre la connexion en cas de rupture de l'écran lui-même.The integrity line of FIG. 5 consists of a line 330 of single connection to the electronic card disposed on the screen of the display 300, this line traversing the entire screen in all its directions so as to be able to break the connection. in case of breakage of the screen itself.
La ligne 330 constitue un interrupteur entre les contacts A et B dont l'état est surveillé en permanence par la carte électronique. Si l'interrupteur équivalent est fermé, la ligne 330 n'est pas interrompue et l'écran est considéré comme intact, ses indications sont donc considérées comme fiables. Par contre, en cas de rupture du verre de l'écran entraînant une rupture de la ligne 330, l'état ouvert de l'interrupteur équivalent est détecté par la carte électronique et l'afficheur 300 est mis hors service.The line 330 constitutes a switch between the contacts A and B whose state is continuously monitored by the electronic card. If the equivalent switch is closed, line 330 is not interrupted and the screen is considered intact, so its indications are considered reliable. On the other hand, in the event of rupture of the screen glass causing a break in line 330, the open state of the equivalent switch is detected by the electronic card and the display 300 is turned off.
Cependant, une valeur fiable de la pression peut toujours être fournie par un canal radio par exemple, car la mise hors service de l'afficheur n'a pas d'influence en général sur le fonctionnement du capteur 200 de pression lui- même.However, a reliable value of the pressure can always be provided by a radio channel for example, since the disabling of the display has no influence in general on the operation of the pressure sensor 200 itself.
Une combinaison de plusieurs lignes précitées peut être envisagée. Le câblage de l'écran étant souvent complexe, il peut être nécessaire d'interrompre la ligne de connexion pour laisser d'autres connexions alimentant les segments de l'afficheur. Dans ce cas, la ligne 340 d'intégrité est constituée de lignes élémentaires 341 , 342 reliées par la carte électronique.A combination of several lines mentioned above can be envisaged. Because screen cabling is often complex, it may be necessary to break the connection line to allow other connections to power the display segments. In this case, the integrity line 340 consists of elementary lines 341, 342 connected by the electronic card.
La figure 7 illustre une application de l'invention à un robinet/détendeur dans laquelle le dispositif indicateur 10 de pression débouche dans une portion 600 de circuit haute pression en amont d'un clapet 610 de détente et de la portion basse pression 620 du robinet/détendeur. FIG. 7 illustrates an application of the invention to a valve / expander in which the pressure indicating device 10 opens into a portion 600 of high pressure circuit upstream of a valve 610 for expansion and the low pressure portion 620 of the valve. /regulator.

Claims

REVENDICATIONS
1. Dispositif indicateur (10) d'une grandeur physique, comprenant un boîtier (100) auquel est raccordé un (200) capteur de mesure de ladite grandeur physique et dans lequel est disposé un afficheur (300) d'une valeur représentative de la grandeur physique mesurée par ledit capteur de mesure, ledit dispositif comprenant des composants situés successivement dans des plans sensiblement parallèles, lesdits composants comprenant au moins : un couvercle transparent (120) dudit boîtier (100), ledit afficheur (300) et ledit capteur (200) de mesure, un élément de maintien et de protection tel qu'une résine (130) remplissant un volume intérieur dudit boîtier (100) de façon à enrober au moins partiellement au moins deux des composants internes (100, 120, 300, 310, 320) situés dans des plans parallèles.1. indicating device (10) of a physical quantity, comprising a housing (100) to which is connected a (200) sensor for measuring said physical quantity and in which is disposed a display (300) of a value representative of the physical quantity measured by said measuring sensor, said device comprising components located successively in substantially parallel planes, said components comprising at least: a transparent cover (120) of said housing (100), said display (300) and said sensor (200) ), a holding and shielding member such as a resin (130) filling an interior volume of said housing (100) so as to at least partially coat at least two of the internal components (100, 120, 300, 310, 320) located in parallel planes.
2. Dispositif selon la revendication 1 , caractérisé en ce qu'il comprend également, entre ledit afficheur (300) et ledit capteur (200) de mesure, les composants suivants : une carte électronique (310) pour ledit afficheur et un élément (320) d'alimentation pour ladite carte électronique.2. Device according to claim 1, characterized in that it also comprises, between said display (300) and said sensor (200) measurement, the following components: an electronic card (310) for said display and an element (320) ) for said electronic card.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'il comprend une résine (130) remplissant l'intérieur du boîtier (100) de manière à enrober au moins partiellement tous les composants internes à l'exception de la zone sensible (210) du capteur (200) de mesure.3. Device according to claim 1 or 2, characterized in that it comprises a resin (130) filling the inside of the housing (100) so as to coat at least partially all the internal components with the exception of the sensitive area (210) of the measuring sensor (200).
4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comprend en outre une alarme sonore (400) et une cavité résonnante (420) associée.4. Device according to any one of claims 1 to 3, characterized in that it further comprises an audible alarm (400) and an associated resonant cavity (420).
5. Dispositif selon les revendications 3 et 4 prises en combinaison, caractérisé en ce qu'au moins l'un des éléments suivants est également épargné par la résine (130) : l'alarme sonore (400), l'orifice (410) de sortie de l'alarme sonore, la cavité résonnante (420).5. Device according to claims 3 and 4 taken in combination, characterized in that at least one of the following elements is also spared by the resin (130): the audible alarm (400), the orifice (410) output of the audible alarm, the resonant cavity (420).
6. Dispositif selon la revendication 4 ou 5, caractérisé en ce que ladite cavité résonnante (420) comporte une chicane (421 ). 6. Device according to claim 4 or 5, characterized in that said resonant cavity (420) comprises a baffle (421).
7. Dispositif selon la revendication 6, caractérisé en ce que la chicane est épargnée par la résine (130). 7. Device according to claim 6, characterized in that the baffle is spared by the resin (130).
8. Dispositif selon l'une quelconque des revendications 4 à 7, caractérisé en ce que ladite cavité résonnante (420) est fermée par une membrane (422) de protection.8. Device according to any one of claims 4 to 7, characterized in that said resonant cavity (420) is closed by a membrane (422) protection.
9. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la résine (130) assure le maintien et le blocage en position des composants qu'elle enrobe.9. Device according to any one of claims 1 to 8, characterized in that the resin (130) ensures the holding and blocking in position of the components it coats.
10. Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la résine (130) scelle hermétiquement le corps (110) du boîtier et notamment au niveau de la jonction entre le boîtier (110) et le couvercle (120) transparent.10. Device according to any one of claims 1 to 9, characterized in that the resin (130) hermetically seals the body (110) of the housing and in particular at the junction between the housing (110) and the cover (120). ) transparent.
11. Dispositif selon l'une quelconque des revendications 1 à 10, caractérisé en ce que la résine (130) assure l'étanchéité du boîtier et des composants internes en obstruant le ou les points d'entrée possibles dans le boîtier parmi : un orifice (140) d'injection ou de remplissage pour la résine, une zone de jonction ente deux parties du boîtier (corps (110) / couvercle (120)).11. Device according to any one of claims 1 to 10, characterized in that the resin (130) seals the housing and internal components by obstructing the possible entry point or points in the housing from: an orifice (140) injection or filling for the resin, a junction zone between two parts of the housing (body (110) / cover (120)).
12. Dispositif selon la revendication 11 , caractérisé en ce que la résine (130) ferme le bouchon de l'orifice (140) d'injection ou remplissage.12. Device according to claim 11, characterized in that the resin (130) closes the plug of the orifice (140) of injection or filling.
13. Dispositif selon l'une quelconque des revendications 1 à 12, caractérisé en ce que ledit afficheur (200) comprend un écran d'affichage de caractères alpha-numériques ou graphiques commandé par une carte électronique (310), une ligne (330; 340) de connexion électrique à ladite carte électronique est disposée sur ledit écran, ladite connexion électrique étant apte à se rompre en cas de rupture de l'écran.13. Device according to any one of claims 1 to 12, characterized in that said display (200) comprises a display screen of alpha-numeric or graphic characters controlled by an electronic card (310), a line (330; 340) of electrical connection to said electronic card is disposed on said screen, said electrical connection being able to break in case of rupture of the screen.
14. Dispositif selon l'une quelconque des revendications 1 à 13, caractérisé en ce que ledit boîtier (100) comprend un insert (500) de raccordement auquel est fixé, par exemple par soudage, ledit capteur (200) de mesure.14. Device according to any one of claims 1 to 13, characterized in that said housing (100) comprises an insert (500) connection which is fixed, for example by welding, said sensor (200) measurement.
15. Elément robinet/détendeur pour bouteille de gaz sous pression, définissant un circuit de gaz comportant, en série, une portion de circuit haute pression, un clapet de détente et une portion de circuit basse pression, caractérisé en ce qu'un dispositif indicateur (10) de pression conforme au dispositif indicateur selon l'une quelconque des revendications 1 à 14 débouche dans ladite portion de circuit haute pression. 15. Faucet / pressure regulator element for a pressurized gas cylinder, defining a gas circuit comprising, in series, a high pressure circuit portion, an expansion valve and a low pressure circuit portion, characterized in that an indicating device (10) pressure according to the indicating device according to any one of claims 1 to 14 opens into said high pressure circuit portion.
16. Bouteille de gaz équipée d'un ensemble robinet/détendeur selon la revendication 15. 16. A gas cylinder equipped with a valve / expansion valve assembly according to claim 15.
EP07766010A 2006-05-31 2007-05-09 Device for indicating a physical quantity Ceased EP2029973A1 (en)

Applications Claiming Priority (3)

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FR0651972A FR2901874B1 (en) 2006-05-31 2006-05-31 DEVICE INDICATING A PHYSICAL SIZE
FR0651973A FR2901875A1 (en) 2006-05-31 2006-05-31 Liquid`s e.g. medical fluid, physical quantity e.g. pressure, indicating device for bottle, has pressure sensor integrated to case and resin filling interior volume of case, and connection insert fixed to sensor by welding
PCT/FR2007/051230 WO2007138208A1 (en) 2006-05-31 2007-05-09 Device for indicating a physical quantity

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