WO2019150026A1 - Device for analysing a multiphase fluid - Google Patents

Device for analysing a multiphase fluid Download PDF

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Publication number
WO2019150026A1
WO2019150026A1 PCT/FR2019/050180 FR2019050180W WO2019150026A1 WO 2019150026 A1 WO2019150026 A1 WO 2019150026A1 FR 2019050180 W FR2019050180 W FR 2019050180W WO 2019150026 A1 WO2019150026 A1 WO 2019150026A1
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Prior art keywords
equipment
multiphase fluid
fluid
liquid
oil
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PCT/FR2019/050180
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French (fr)
Inventor
Ousmane Seck
Wajdi BERRICHE
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Monixo
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Publication of WO2019150026A1 publication Critical patent/WO2019150026A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2823—Raw oil, drilling fluid or polyphasic mixtures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • G01N21/80—Indicating pH value
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2894—Oils, i.e. hydrocarbon liquids for metal working or machining
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N2021/8405—Application to two-phase or mixed materials, e.g. gas dissolved in liquids

Definitions

  • the present invention relates to the field of the characterization of multiphase fluids and in particular an oil / water mixture of liquid cutting type or machining fluid.
  • a cutting fluid and more generally a machining fluid, is a coolant and lubricant specially designed for working and machining metals.
  • machining fluids including oils, emulsions, aerosols, air and other gases.
  • oils emulsions, aerosols, air and other gases.
  • aerosols air and other gases.
  • the fluids are loaded not only with metals, more or less solubilized, but also with undesirable compounds (resulting from the thermal degradation of the fluid) and, especially when using aqueous fluids, with biological contaminants. (mold, bacteria, etc.).
  • the machining operations emit aerosols, the inhalation of which can be at the origin of various respiratory diseases.
  • the compounds mentioned above are found in the air, some of which are carcinogens 1 or respiratory allergens.
  • An embodiment of a system may include a flow orientation device for directing the MPF between broadband near-infrared (NIR) paired transmitters and detectors electrically coupled to conditioning, processing, and power modules. and signal characterization to determine MPF uptake and diffusion and define and display MPF characteristics to measure and monitor oil-related operations.
  • NIR near-infrared
  • US Pat. No. 9689802 discloses another example of apparatus and method for measuring water content and pH water of mixtures of multiphase fluids of water and oil.
  • the apparatus uses a water content sensor containing an infrared light source and a photodetector.
  • the pH sensor includes a pH indicator that exhibits a color change in an oleophobic coating comprising an image recording device.
  • the apparatus and method can be applied to measure water fraction and pH in oil / water lines.
  • US Pat. No. 7,447,471 discloses an apparatus for characterizing mixtures of multiphase fluids to determine the proportion of each aqueous oil / emulsion phase, the size of the fine particles in the liquid-solid suspensions and the characteristics of the foam phase. It implements a method of applying an alternating current of a predetermined magnitude to a portion of a multiphase fluid and measuring the electrical impedance spectrum on said portion of the multiphase fluid, a characteristic of the multiple phases that can be determined from the measured electrical impedance spectra.
  • the present invention aims to overcome these drawbacks by providing equipment for continuous monitoring of a multiphase working fluid, including a cutting fluid formed by an oil-water mixture.
  • the invention relates, according to its most general meaning, to a multiphase fluid analysis device comprising a plurality of physico-chemical sensors, characterized in that it comprises a first hydraulic circuit comprising a suction pump of liquid to be characterized to a measuring chamber, and a second hydraulic circuit comprising a suction pump of a buffer liquid to said measuring chamber.
  • the equipment is furthermore equipped with a third hydraulic circuit comprising a suction pump for an electrolytic liquid towards said measuring chamber.
  • the measuring chamber is provided with a temperature sensor, a pH meter and an optical sensor associated with a light source.
  • the equipment comprises an electronic circuit controlling the sequence of operation of said suction pumps.
  • FIG. 1 shows a schematic view of an equipment according to the invention.
  • the equipment according to the invention relates to the field of multiphase liquid analysis. It applies non-exclusively but preferentially to the fluid / cutting oil and mineral oil.
  • For mineral oil the viscosity at various temperatures, the temperature, the water content of the oil, the dissolved gas content.
  • the device is wireless and connected to a platform through a gateway that provides internal and external device connectivity.
  • a hydraulic subassembly consisting of peristaltic pumps, solenoid valves, and tanks that perform the functions of fluid storage, with the fluid to be analyzed on the one hand, the buffer solution for calibration, the solution of preservation (ionic for pH meter electrode protection) on the other hand.
  • an electronic subassembly with instrumentation systems (sensors and probes), a set of microcontrollers in charge of the collection, processing and transmission of data from sensors but also the scheduling of tasks of hydraulic components .
  • the equipment periodically takes a sample of working fluid from a reservoir (1) through a peristaltic pump (2) and a conduit (3).
  • the sampled liquid is transferred to a measurement chamber (4) equipped with a temperature sensor (5), an electrode of a pH meter (6), an infra-red sensor (7), a an ultraviolet photodiode (8) and a light source (9).
  • An electronic circuit (10) comprises the components for processing the different sensors.
  • the equipment further comprises a reservoir containing a buffer solution (11) and a peristaltic pump (12) which periodically fills the measuring chamber (4) to allow the automatic recalibration of the sensors.
  • the equipment further comprises a reservoir containing an electrolytic solution (13) and a peristaltic pump (14) which periodically fills the measuring chamber (4) to protect the electrodes (6) of the pH meter between two measurement sequences.
  • the electronic circuit (10) controls the operating sequence of the peristaltic pumps (3, 12, 14).
  • the advantage of the equipment according to the invention is that it makes it possible to measure not only the properties of the liquid on all the operating modes of the associated machine (machine tools, or electrical machine) but above all to follow the state of the measurements. residual and non-residual at a given moment and thus to predict the evolution of the state of the oil in a precise and reliable way.
  • the fluids are periodically sent to the laboratory to be subjected to colorimetry, refractometry and spectrometry tests. They do not provide on-site temperature measurement at the same time as other measurements. Since the temperature is not a residual parameter, certain other attributes of the fluid are modified. For example, the temperature of an oil mineral is correlated with its water content, and this property is not residual, during laboratory analyzes, or a posteriori, the comparison is difficult or impossible and the evolution of the state of the oil difficult to predict.
  • the qualitative measurements are completely reliable only during their use during a machining for example, because it keeps intact all the properties to judge the non-quality of the fluid. A posteriori, these properties are altered and therefore less reliable and less meaningful in the context of a predictive analysis of degradation.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Food Science & Technology (AREA)
  • Plasma & Fusion (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Reciprocating Pumps (AREA)
  • Sampling And Sample Adjustment (AREA)
  • External Artificial Organs (AREA)

Abstract

The invention relates to a device for analysing a multiphase fluid, comprising a plurality of physico-chemical sensors. The device comprises a first hydraulic circuit including a suction pump (3) for drawing the liquid to be characterised into a measurement chamber (4), and a second hydraulic circuit comprising a suction pump (12) for drawing a buffer liquid (11) into the measurement chamber (4).

Description

EQUIPEMENT D'ANALYSE D'UN FLUIDE POLYPHASIQUE  EQUIPMENT FOR ANALYZING A POLYPHASIC FLUID
Domaine de 1 ' invention Field of the invention
La présente invention concerne le domaine de la caractérisation de fluides polyphasiques et notamment d'un mélange huile/eau de type liquide de coupe ou fluide d'usinage. The present invention relates to the field of the characterization of multiphase fluids and in particular an oil / water mixture of liquid cutting type or machining fluid.
Un liquide de coupe, et plus généralement un fluide d'usinage, est un liquide refroidissant et lubrifiant conçu spécialement pour le travail et l'usinage des métaux. A cutting fluid, and more generally a machining fluid, is a coolant and lubricant specially designed for working and machining metals.
Il existe différents types de fluides d'usinage, parmi lesquels on retrouve les huiles, les émulsions, les aérosols, l'air et d'autres gaz. L'utilisation de ces fluides améliore le travail et les procédés d'usinage des matériaux métalliques, en : There are different types of machining fluids, including oils, emulsions, aerosols, air and other gases. The use of these fluids improves the work and the machining processes of metallic materials, by:
• maintenant la pièce en cours de travail à une température stable ( fonction critique lorsque les tolérances de fabrication sont réduites) ; • keeping the workpiece at a stable temperature (critical function when manufacturing tolerances are reduced);
• augmentant la durée de vie de l'outil de coupe en lubrifiant l'arête de coupe et en réduisant le phénomène de copeau rapporté ; • Increasing the life of the cutting tool by lubricating the cutting edge and reducing the reported chip phenomenon;
• réduisant l'usure de la machine utilisée ; • reducing the wear of the machine used;
• améliorant les conditions de travail des opérateurs. • improving the working conditions of the operators.
Au cours de l'usinage, les fluides se chargent non seulement en métaux, plus ou moins solubilisés, mais aussi en composés indésirables (issus de la dégradation thermique du fluide) et, surtout en cas d'utilisation de fluides aqueux, en contaminants biologiques (moisissures, bactéries, etc.). Les opérations d'usinage émettent des aérosols, dont l'inhalation peut être à l'origine de diverses affections respiratoires. On retrouve en effet dans l'air les composés évoqués ci-dessus, dont certains sont des cancérogènes 1 ou des allergisants respiratoires. During the machining, the fluids are loaded not only with metals, more or less solubilized, but also with undesirable compounds (resulting from the thermal degradation of the fluid) and, especially when using aqueous fluids, with biological contaminants. (mold, bacteria, etc.). The machining operations emit aerosols, the inhalation of which can be at the origin of various respiratory diseases. The compounds mentioned above are found in the air, some of which are carcinogens 1 or respiratory allergens.
Par ailleurs, le contact cutané avec ces mêmes fluides est susceptible de provoquer des dermatites ou des lésions eczématiformes . Moreover, skin contact with these same fluids is likely to cause dermatitis or eczematiform lesions.
Il est donc nécessaire de surveiller périodiquement les caractéristiques du liquide de coupe. It is therefore necessary to periodically monitor the characteristics of the cutting fluid.
Etat de la technique State of the art
Il est connu dans l'art antérieur de procéder à l'analyse de liquides polyphasés par des équipements de laboratoire, selon des protocoles pouvant nécessiter plusieurs heures de traitement . It is known in the prior art to carry out the analysis of polyphase liquids by laboratory equipment, according to protocols that may require several hours of treatment.
Il aussi connu d'automatiser de telles analyses. La demande de brevet WO 2017007763 décrit des modes de réalisation de systèmes et de procédés pour caractériser un écoulement polyphasique (MPF) de fluide et améliorer la mesure et la surveillance de la totalité d'une plage de teneur en eau dans une partie d'un tuyau pour des opérations liées au pétrole. Un mode de réalisation d'un système peut comprendre un dispositif d'orientation d'écoulement pour diriger le MPF entre des émetteurs et des détecteurs appairés en proche infrarouge (NIR) à large bande, couplés électriquement à des modules de conditionnement, de traitement, et de caractérisation de signal pour déterminer l'absorption et la diffusion du MPF et définir et afficher des caractéristiques du MPF pour mesurer et surveiller des opérations liées au pétrole. He also known to automate such analyzes. The patent application WO 2017007763 describes embodiments of systems and methods for characterizing a multiphase flow (MPF) of fluid and improving the measurement and monitoring of an entire water content range in a part of a pipe for oil-related operations. An embodiment of a system may include a flow orientation device for directing the MPF between broadband near-infrared (NIR) paired transmitters and detectors electrically coupled to conditioning, processing, and power modules. and signal characterization to determine MPF uptake and diffusion and define and display MPF characteristics to measure and monitor oil-related operations.
Le brevet américain US 9689802 décrit un autre exemple d'appareil et procédé pour mesurer la teneur en eau et le pH de l'eau de mélanges de fluides polyphasiques d'eau et d'huile. L'appareil utilise un capteur de teneur en eau contenant une source de lumière infrarouge et un photodétecteur. Le capteur de pH comprend un indicateur de pH qui présente un changement de couleur dans un revêtement oléophobe comprenant un dispositif d'enregistrement d'image. L'appareil et le procédé peuvent être appliqués pour mesurer la fraction d'eau et le pH dans des conduites d'huile /eau. US Pat. No. 9689802 discloses another example of apparatus and method for measuring water content and pH water of mixtures of multiphase fluids of water and oil. The apparatus uses a water content sensor containing an infrared light source and a photodetector. The pH sensor includes a pH indicator that exhibits a color change in an oleophobic coating comprising an image recording device. The apparatus and method can be applied to measure water fraction and pH in oil / water lines.
Le brevet américain US7474971 décrit un appareil pour caractériser des mélanges de fluides polyphasiques, pour déterminer la proportion de chaque phase huile / émulsion aqueuse, la taille des particules fines dans les suspensions liquide-solide et les caractéristiques de la phase de mousse. Il met en œuvre un procédé consistant à appliquer un courant alternatif d'une amplitude prédéterminée à une partie d'un fluide à phases multiples et à mesurer le spectre d'impédance électrique sur ladite partie du fluide à phases multiples, une caractéristique du fluide à phases multiples pouvant être déterminée à partir des spectres d'impédance électrique mesurés . US Pat. No. 7,447,471 discloses an apparatus for characterizing mixtures of multiphase fluids to determine the proportion of each aqueous oil / emulsion phase, the size of the fine particles in the liquid-solid suspensions and the characteristics of the foam phase. It implements a method of applying an alternating current of a predetermined magnitude to a portion of a multiphase fluid and measuring the electrical impedance spectrum on said portion of the multiphase fluid, a characteristic of the multiple phases that can be determined from the measured electrical impedance spectra.
Inconvénients de l'art antérieur Disadvantages of prior art
Les solutions de l'art antérieur ne sont pas adaptées à la réalisation de mesure en temps réel, de manière quasiment continue, pour assurer le suivi de l'évolution d'un fluide de travail, par exemple un fluide de coupe. Elle sont destinées à des mesures ponctuelles, généralement en laboratoire, avec une réponse en temps différé. The solutions of the prior art are not adapted to real-time measurement, almost continuously, to monitor the evolution of a working fluid, for example a cutting fluid. They are intended for one-off measurements, usually in the laboratory, with a delayed response.
Solution apportée par l'invention Solution provided by the invention
La présente invention vise à remédier à ces inconvénients en proposant un équipement permettant de procéder à la surveillance en continu d'un fluide de travail polyphasique, notamment un fluide de coupe formé par un mélange huile-eau. A cet effet, l'invention concerne selon son acception la plus générale un équipement d'analyse d'un fluide polyphasique comprenant une pluralité de capteurs physico-chimiques caractérisé en ce qu'il comporte un premier circuit hydraulique comportant une pompe d'aspiration du liquide à caractériser vers une enceinte de mesure, et un deuxième circuit hydraulique comportant une pompe d'aspiration d'un liquide tampon vers ladite enceinte de mesure. The present invention aims to overcome these drawbacks by providing equipment for continuous monitoring of a multiphase working fluid, including a cutting fluid formed by an oil-water mixture. For this purpose, the invention relates, according to its most general meaning, to a multiphase fluid analysis device comprising a plurality of physico-chemical sensors, characterized in that it comprises a first hydraulic circuit comprising a suction pump of liquid to be characterized to a measuring chamber, and a second hydraulic circuit comprising a suction pump of a buffer liquid to said measuring chamber.
Selon une variante, l'équipement est en outre équipé d'un troisième circuit hydraulique comportant une pompe d'aspiration d'un liquide électrolytique vers ladite enceinte de mesure. According to one variant, the equipment is furthermore equipped with a third hydraulic circuit comprising a suction pump for an electrolytic liquid towards said measuring chamber.
De préférence, l'enceinte de mesure est munie d'un capteur de température, d'un pH-mètre et d'un capteur optique associé à une source lumineuse. Preferably, the measuring chamber is provided with a temperature sensor, a pH meter and an optical sensor associated with a light source.
Avantageusement, l'équipement comporte un circuit électronique commandant la séquence de fonctionnement desdites pompes d ' aspiration . Advantageously, the equipment comprises an electronic circuit controlling the sequence of operation of said suction pumps.
Description détaillée d'un exemple Detailed description of an example
non limitatif de l'invention  non-limiting of the invention
La présente invention sera mieux comprise à la lumière de la description qui suit de modes particuliers de réalisation non limitatifs, en référence à la figure unique annexée : The present invention will be better understood in the light of the following description of particular nonlimiting embodiments, with reference to the single appended figure:
- La figure 1 représente une vue schématique d'un équipement selon l'invention. - Figure 1 shows a schematic view of an equipment according to the invention.
L'équipement selon l'invention concerne le domaine de l'analyse de liquide polyphasique . Il s'applique de manière non exclusive mais préférentielle, au fluide/huile de coupe et huile minérale. The equipment according to the invention relates to the field of multiphase liquid analysis. It applies non-exclusively but preferentially to the fluid / cutting oil and mineral oil.
L'équipement décrit permet de mesurer : Pour les fluides/ huiles de coupe : la viscosité, le Ph, la concentration en huile de l'eau, la dureté et la conductivité ; The described equipment measures: For fluids / cutting oils: viscosity, pH, water oil concentration, hardness and conductivity;
Pour l'huile minérale : la viscosité à diverses températures, la température, la teneur en eau de l'huile, la teneur en gaz dissouts. For mineral oil: the viscosity at various temperatures, the temperature, the water content of the oil, the dissolved gas content.
Le dispositif est sans fil et relié à une plateforme par le biais d'une passerelle qui assure la connectivité interne et externe du dispositif. The device is wireless and connected to a platform through a gateway that provides internal and external device connectivity.
Il présente deux sous-ensembles : un sous-ensemble hydraulique constitué de pompes péristaltiques, électrovannes, et de réservoirs remplissant les fonctions de stockage de fluide, avec le fluide à analyser d'une part, la solution tampon pour l'étalonnage, la solution de conservation (ionique pour la protection d'électrode de pH- mètre) d'autre part. un sous-ensemble électronique : avec des systèmes d'instrumentations (capteurs et sondes ), d'un ensemble de microcontrôleurs en charge de la collecte, le traitement et la transmission de données issues de capteurs mais aussi l'ordonnancement des tâches des composantes hydrauliques. It has two subassemblies: a hydraulic subassembly consisting of peristaltic pumps, solenoid valves, and tanks that perform the functions of fluid storage, with the fluid to be analyzed on the one hand, the buffer solution for calibration, the solution of preservation (ionic for pH meter electrode protection) on the other hand. an electronic subassembly: with instrumentation systems (sensors and probes), a set of microcontrollers in charge of the collection, processing and transmission of data from sensors but also the scheduling of tasks of hydraulic components .
L'équipement prélève périodiquement un échantillon de fluide de travail depuis un réservoir (1) grâce à une pompe péristaltique (2) et un conduit (3). The equipment periodically takes a sample of working fluid from a reservoir (1) through a peristaltic pump (2) and a conduit (3).
Le liquide prélevé est transféré dans une enceinte de mesure (4) équipée d'un capteur de température (5), d'une électrode d'un pH-mètre (6), d'un capteur infra-rouge (7), d'une photodiode ultraviolet (8) et d'une source d'éclairage (9). The sampled liquid is transferred to a measurement chamber (4) equipped with a temperature sensor (5), an electrode of a pH meter (6), an infra-red sensor (7), a an ultraviolet photodiode (8) and a light source (9).
Un circuit électronique (10) comporte les composants pour le traitement des différents capteurs. L'équipement comporte en outre un réservoir contenant une solution tampon (11) et une pompe péristaltique (12) qui assure périodiquement le remplissage de l'enceinte de mesure (4) pour permettre le recalibrage automatique des capteurs. An electronic circuit (10) comprises the components for processing the different sensors. The equipment further comprises a reservoir containing a buffer solution (11) and a peristaltic pump (12) which periodically fills the measuring chamber (4) to allow the automatic recalibration of the sensors.
L'équipement comporte en outre un réservoir contenant une solution électrolytique (13) et une pompe péristaltique (14) qui assure périodiquement le remplissage de l'enceinte de mesure (4) pour assurer la protection des électrodes (6) du pH-mètre entre deux séquences de mesure. The equipment further comprises a reservoir containing an electrolytic solution (13) and a peristaltic pump (14) which periodically fills the measuring chamber (4) to protect the electrodes (6) of the pH meter between two measurement sequences.
Le circuit électronique (10) commande la séquence de fonctionnement des pompes péristaltiques (3, 12, 14). The electronic circuit (10) controls the operating sequence of the peristaltic pumps (3, 12, 14).
L'équipement décrit permet de résoudre plusieurs problèmes: The described equipment solves several problems:
Il permet des collecter, traiter, et analyser l'ensemble des mesures permettant de caractériser l'état et la qualité de l'huile à un moment précis. L'ensemble des mesures collectées permet de suivre l'état d'une huile de coupe. It allows to collect, process, and analyze all the measures allowing to characterize the state and the quality of the oil at a precise moment. All the measurements collected make it possible to follow the state of a cutting oil.
L'intérêt de l'équipement selon l'invention est de permettre de mesurer non seulement les propriétés du liquide sur tous les modes de fonctionnement de la machine associée (machines- outils, ou machine électrique) mais surtout de suivre l'état des mesures résiduelles et non résiduelles à un instant donné et donc de prévoir l'évolution de l'état de l'huile de façon précise et fiable. The advantage of the equipment according to the invention is that it makes it possible to measure not only the properties of the liquid on all the operating modes of the associated machine (machine tools, or electrical machine) but above all to follow the state of the measurements. residual and non-residual at a given moment and thus to predict the evolution of the state of the oil in a precise and reliable way.
Dans les solutions connues, les fluides sont envoyés périodiquement en laboratoire pour être soumis à des tests de colorimétrie, réfractométrie , spectrométrie. Elles ne prévoient pas la mesure sur site de la température, au même moment que les autres mesures. Or la température n'étant pas un paramètre résiduel, certains autres attributs du fluide sont modifiés. Par exemple, la température d'une huile minérale est corrélée à sa teneur en eau, et cette propriété n'étant pas résiduelle, lors des analyses en laboratoire, ou a posteriori, la comparaison est difficile voire impossible et l'évolution de l'état de l'huile difficile à prévoir. In the known solutions, the fluids are periodically sent to the laboratory to be subjected to colorimetry, refractometry and spectrometry tests. They do not provide on-site temperature measurement at the same time as other measurements. Since the temperature is not a residual parameter, certain other attributes of the fluid are modified. For example, the temperature of an oil mineral is correlated with its water content, and this property is not residual, during laboratory analyzes, or a posteriori, the comparison is difficult or impossible and the evolution of the state of the oil difficult to predict.
Dans le cas du liquide de coupe, idéalement, les mesures qualitatives ne sont complètement fiables que pendant leur usage lors d'un usinage par exemple, car il conserve intacte l'ensemble des propriétés permettant de juger de la non- qualité du fluide. A postériori, ces propriétés sont altérées et donc moins fiables et moins parlant dans le cadre d'une analyse prévisionnelle de la dégradation. In the case of the cutting fluid, ideally, the qualitative measurements are completely reliable only during their use during a machining for example, because it keeps intact all the properties to judge the non-quality of the fluid. A posteriori, these properties are altered and therefore less reliable and less meaningful in the context of a predictive analysis of degradation.
Une autre spécificité est la possibilité de procéder à plusieurs types de mesures de haute précision, grâce à un seul dispositif. Sur le Ph et la concentration, la précision du dispositif est de + ou -0,01 d'écart tolérable. Another specificity is the possibility of carrying out several types of high precision measurements, thanks to a single device. On Ph and concentration, the accuracy of the device is + or -0.01 tolerable difference.
Cette faculté unique est rendue possible grâce à la mise en place de plusieurs techniques, par exemple: This unique faculty is made possible thanks to the implementation of several techniques, for example:
L'étalonnage automatique des pH-mètres, grâce à une solution tampon : normalement dans le temps, un pH-mètre perd son calibrage de base et devient de facto moins précis. Cela est également valable pour des mesures de conductivité par exemple. Cette technique n'est donc pas exclusive. Automatic calibration of pH meters thanks to a buffer solution: Normally over time, a pH meter loses its basic calibration and becomes de facto less accurate. This is also valid for conductivity measurements for example. This technique is not exclusive.
Le calibrage automatique des spectromètres grâce aux modèles analytiques rendant ainsi possible l'usage du même dispositif sur plusieurs types de fluide pour en identifier la concentration . The automatic calibration of the spectrometers thanks to the analytical models thus making it possible to use the same device on several types of fluid to identify its concentration.

Claims

Revendications  claims
1 - Equipement d'analyse d'un fluide polyphasique comprenant une pluralité de capteurs physico-chimique caractérisé en ce qu'il comporte un premier circuit hydraulique comportant une pompe d'aspiration (3) du liquide à caractériser vers une enceinte de mesure (4), et un deuxième circuit hydraulique comportant une pompe d'aspiration (12) d'un liquide tampon (11) vers ladite enceinte de mesure (4). 2 - Equipement d'analyse d'un fluide polyphasique selon la revendication 1 caractérisé en ce qu'il est équipé d'un troisième circuit hydraulique comportant une pompe d'aspiration (14) d'un liquide électrolytique (13) vers ladite enceinte de mesure (4). 3 - Equipement d'analyse d'un fluide polyphasique selon la revendication 1 caractérisé en ce que ladite enceinte de mesure (4) est munie d'un capteur de température (5), d'un pH- mètre (6), et d'un capteur optique associé (7, 8) à une source lumineuse ( 9 ) . 4 - Equipement d'analyse d'un fluide polyphasique selon la revendication 1 ou 2 caractérisé en ce qu'il comporte un circuit électronique (10) commandant la séquence de fonctionnement desdites pompes d'aspiration. 1 - Equipment for analyzing a multiphase fluid comprising a plurality of physico-chemical sensors characterized in that it comprises a first hydraulic circuit comprising a suction pump (3) of the liquid to be characterized to a measurement chamber (4 ), and a second hydraulic circuit comprising a suction pump (12) of a buffer liquid (11) to said measuring chamber (4). 2 - Equipment for analyzing a multiphase fluid according to claim 1 characterized in that it is equipped with a third hydraulic circuit comprising a suction pump (14) of an electrolytic liquid (13) to said enclosure of measure (4). 3 - Equipment for analyzing a multiphase fluid according to claim 1 characterized in that said measuring chamber (4) is provided with a temperature sensor (5), a pH meter (6), and an associated optical sensor (7, 8) to a light source (9). 4 - multiphase fluid analysis equipment according to claim 1 or 2 characterized in that it comprises an electronic circuit (10) controlling the operating sequence of said suction pumps.
PCT/FR2019/050180 2018-01-31 2019-01-29 Device for analysing a multiphase fluid WO2019150026A1 (en)

Applications Claiming Priority (2)

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FR1850779 2018-01-31
FR1850779A FR3077389B1 (en) 2018-01-31 2018-01-31 POLYPHASIC FLUID ANALYSIS EQUIPMENT

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WO2019150026A1 true WO2019150026A1 (en) 2019-08-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11555813B2 (en) * 2019-03-14 2023-01-17 Bvba Dierickx-Tools Apparatus and method for monitoring a condition of metalworking fluid of a metalworking fluid circuit of a metalworking machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7474971B2 (en) 2003-02-26 2009-01-06 Commonwealth Scientific And Industrial Research Organization Method and apparatus for characterising multiphase fluid mixtures
WO2017007763A1 (en) 2015-07-06 2017-01-12 Saudi Arabian Oil Company Systems and methods for near-infrared based water cut monitoring in multiphase fluid flow
US9689802B2 (en) 2012-06-29 2017-06-27 Southwest Research Institute Systems, methods and apparatus for analysis of multiphase fluid mixture in pipelines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7474971B2 (en) 2003-02-26 2009-01-06 Commonwealth Scientific And Industrial Research Organization Method and apparatus for characterising multiphase fluid mixtures
US9689802B2 (en) 2012-06-29 2017-06-27 Southwest Research Institute Systems, methods and apparatus for analysis of multiphase fluid mixture in pipelines
WO2017007763A1 (en) 2015-07-06 2017-01-12 Saudi Arabian Oil Company Systems and methods for near-infrared based water cut monitoring in multiphase fluid flow

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11555813B2 (en) * 2019-03-14 2023-01-17 Bvba Dierickx-Tools Apparatus and method for monitoring a condition of metalworking fluid of a metalworking fluid circuit of a metalworking machine

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FR3077389A1 (en) 2019-08-02
FR3077389B1 (en) 2020-02-28

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