EP2668400B1 - System for monitoring a pneumatically-actuated alternating linear displacement pump - Google Patents

System for monitoring a pneumatically-actuated alternating linear displacement pump Download PDF

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Publication number
EP2668400B1
EP2668400B1 EP12705372.6A EP12705372A EP2668400B1 EP 2668400 B1 EP2668400 B1 EP 2668400B1 EP 12705372 A EP12705372 A EP 12705372A EP 2668400 B1 EP2668400 B1 EP 2668400B1
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EP
European Patent Office
Prior art keywords
pneumatic
pump
pneumatic pressure
monitoring system
pressure
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Application number
EP12705372.6A
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German (de)
French (fr)
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EP2668400A1 (en
Inventor
Philippe De Talhouet
Cédric MOSNIER
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Exel Industries SA
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Exel Industries SA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0409—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material the pumps being driven by a hydraulic or a pneumatic fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B11/00—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
    • F04B9/125—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting elastic-fluid motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
    • F04B9/127—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting elastic-fluid motor, e.g. actuated in the other direction by gravity or a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/10—Motor parameters of linear elastic fluid motors

Definitions

  • the invention relates to a monitoring system of a reciprocating linear displacement pneumatic pump.
  • the invention is particularly useful for monitoring paint feed pumps, in pumping or extrusion, dosing, or regulating liquid and thick products, intended to be pumped, dispensed, regulated and delivered in flow rates. continuous or intermittent.
  • the reciprocating linear pneumatic motor is at the origin of the output pressure of the product.
  • the ratio of the piston sections of the reciprocating linear displacement motor and the pump piston gives the theoretical pressure ratio between the reciprocating linear air motor and the paint feed pump.
  • This theoretical pressure ratio between the reciprocating linear air motor and the paint feed pump thus determines the output pressure of the product generated by the pump.
  • Reciprocating linear air motors operate with the pneumatic energy delivered by a pressurized air supply and are generally connected to an exhaust.
  • the movement of the reciprocating linear displacement pneumatic motors can be controlled by an electromechanical system comprising two limit switches connected to an air distributor.
  • This high-flow air distributor directs the pressurized air alternately into the upper chamber or the lower chamber of the engine to cause the descent or the rise of the piston, while ensuring the escape of the air driven from the other chamber, lower or higher, the engine.
  • WO 2007/016151 A2 discloses a method of driving a pump powered by compressed air, using a magnet mounted in the air motor distributor spool and two magnetic sensors mounted in the dispenser cover to observe the speed and position of the spool valve spool.
  • the document US 4,405,292A discloses a pump operated by compressed air, in which the reference 40 corresponds to an air pressure source, the reference 104 corresponds to an AND logic gate, the reference 108 corresponds to a logic gate NO and the reference 112 corresponds to an input of pneumatic memory.
  • the document DE 37 08 989 relates to a circuit for operating a piston actuated by a fluid pressure to fix a workpiece.
  • the document EP 2 273 114 is relative to an alternative pump with a piston and a pneumatic valve monitored electronically.
  • This alternative pump comprises a piston position sensor.
  • the object of the invention is to improve the known state of the art, by proposing a new monitoring system for a pneumatic pump with linear reciprocating movement, immediate understanding and simple use.
  • the subject of the invention is a system for monitoring a pump of a liquid or pasty product as defined in claim 1.
  • a monitoring device for a pneumatic motor 1 with reciprocating linear displacement driving a paint supply pump comprises means 2 of pneumatic pressure sensor, means 3 for transmitting the signal representative of the pneumatic pressure sensed, and means 4 AC pneumatic pump management system with linear displacement from the transmitted signal representative of the sensed pneumatic pressure.
  • the pneumatic pressure sensor means 2 advantageously comprise a single pressure sensor for measuring the pressure of the upper chamber 1a of the air motor 1.
  • the pneumatic pressure sensor is located outside the pneumatic motor 1 in this example.
  • the invention also covers the variant not shown, according to which the pneumatic pressure sensor is located inside the pneumatic motor 1.
  • the means 3 for transmitting the signal representative of the sensed pneumatic pressure preferably transmit an electrical signal representative of the pneumatic pressure sensed at means 4 of pneumatic actuation pump with reciprocating linear displacement.
  • the pneumatic actuation pump means 4 with reciprocating linear displacement comprise a clock or a counter capable of generating at least one chronogram representative of the evolution of the pneumatic pressure sensed from the transmitted signal representative of the sensed pneumatic pressure.
  • the invention applies to the monitoring of all known reversal direction control systems of linear reciprocating pneumatic motors driving a feed pump, which raise or lower the piston, directing the air under pressure alternatively in the upper chamber or the lower chamber of the engine to cause the descent or the rise of the piston, while ensuring the escape of the air driven from the other chamber, lower or higher, the engine.
  • a chronogram of implementation of the system according to the invention of monitoring for a pneumatic motor 1 with reciprocating linear displacement driving a paint supply pump describes a normal operation of the paint supply pump.
  • the system according to the invention for monitoring a pneumatic motor 1 with reciprocating linear displacement calculates the frequency of the piston of the engine 1 to deduce therefrom the flow rate of the paint supply pump, and calculates the air pressure value in the engine 1 to deduce by calculation the pressure of the paint at the output of the feed pump.
  • the reciprocating linear air motor causing the product outlet pressure is subjected to a resistant force of the paint supply pump depending on the outlet pressure of the product. generated by the pump.
  • the regular alternating chronogram of the figure 2 the pneumatic pressure P sensed from the transmitted signal as a function of time T thus corresponds to a regular alternating cycle of the product outlet pressure generated by the paint supply pump.
  • a chronogram of implementation of the system according to the invention for monitoring a pneumatic motor 1 reciprocating linear displacement driving a paint supply pump describes a defective operation of the paint supply pump.
  • the reciprocating linear air motor causing the product outlet pressure is subjected to a resistant force of the paint supply pump depending on the outlet pressure of the product. generated by the pump.
  • the irregular alternating chronogram of the figure 3 the pneumatic pressure P sensed from the signal transmitted as a function of time T corresponds to an evolution reflecting a significant decrease in the cycle time of the pump, the detection of which is effective when the cycle time becomes less than a predetermined threshold value or calculated.
  • This effective detection of a significant decrease in the cycle time of the pump indicates a runaway of the pump, which can for example come from a defusing of the pump, or a problem of cavitation.
  • a chronogram of implementation of the system according to the invention for monitoring a pneumatic motor 1 reciprocating linear displacement driving a paint supply pump describes a defective operation of the paint supply pump.
  • the reciprocating linear air motor causing the product outlet pressure is subjected to a resistant force of the paint supply pump depending on the outlet pressure of the product. generated by the pump.
  • the irregular alternating chronogram of the figure 4 the pneumatic pressure P sensed from the transmitted signal as a function of time T corresponds to an evolution, in which the discharge time T1 of the pneumatic pressure P is greater than the suction time T2 of the pneumatic pressure P.
  • a chronogram of implementation of the system according to the invention for monitoring a pneumatic motor 1 reciprocating linear displacement driving a paint supply pump describes a defective operation of the paint supply pump.
  • the reciprocating linear air motor causing the product outlet pressure is subjected to a resistant force of the paint supply pump depending on the outlet pressure of the product. generated by the pump.
  • the irregular alternating chronogram of the figure 5 the pneumatic pressure P sensed from the transmitted signal as a function of time T corresponds to an evolution, in which the discharge time T1 of the pneumatic pressure P is less than the suction time T2 of the pneumatic pressure P.
  • a first variant of the system according to the invention for monitoring a pneumatic motor 1 with linear reciprocating displacement a paint feed pump advantageously comprises means for measuring over several periods of the pneumatic pressure signal, and means for testing and validating this measurement only if the frequency of the signal is constant.
  • a second variant of the system according to the invention for monitoring a pneumatic motor 1 with reciprocating linear displacement driving a paint supply pump advantageously comprises means for testing and validation by learning.
  • the monitoring system according to the invention remakes this training
  • the two variants of monitoring systems according to the invention for a pneumatic motor 1 with reciprocating linear displacement driving a paint supply pump make it possible to avoid erroneous leak detections or flow calculation errors during a phase of the invention. priming or rising tint, or during a normal use of work by so-called "gating" keys.
  • Each system according to the invention for monitoring a pneumatic motor 1 with reciprocating linear displacement thus records the frequency of the signal which will serve as a reference for filtering the periods of initiation or rise in hue, or work by keys known as "gachetage" .
  • a single pneumatic pressure sensor of a chamber of a linear reciprocating pneumatic motor 1 driving a paint supply pump makes it possible to calculate the frequency of the piston of the pneumatic motor for the detection of runaway, wear, or cavitation of the paint feed pump, test whether the piston descent time is greater than the rise time in order to detect leakage of the pump top valve displacement feed in painting, to test whether the rise time of the piston is greater than the descent time in order to detect a leakage of the bottom valve of the paint supply displacement pump, to calculate flow values in different units, and calculate the output pressure of the pumped product.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Servomotors (AREA)
  • Measuring Fluid Pressure (AREA)
  • Coating Apparatus (AREA)

Description

L'invention est relative à un système de surveillance d'une pompe à actionnement pneumatique à déplacement linéaire alternatif.The invention relates to a monitoring system of a reciprocating linear displacement pneumatic pump.

L'invention est particulièrement utile pour surveiller les pompes d'alimentation en peinture, dans des applications de pompage ou d'extrusion, de dosage, ou de régulation de produits liquides et épais, destinés à être pompés, distribués, régulés et déposés en débits continus ou intermittents.The invention is particularly useful for monitoring paint feed pumps, in pumping or extrusion, dosing, or regulating liquid and thick products, intended to be pumped, dispensed, regulated and delivered in flow rates. continuous or intermittent.

Dans ce genre de pompe d'alimentation en peinture, le moteur pneumatique à déplacement linéaire alternatif est à l'origine de la pression de sortie du produit.In this type of paint feed pump, the reciprocating linear pneumatic motor is at the origin of the output pressure of the product.

Le rapport des sections du piston du moteur pneumatique à déplacement linéaire alternatif et du piston de la pompe donne le rapport de pression théorique entre le moteur pneumatique à déplacement linéaire alternatif et la pompe d'alimentation en peinture.The ratio of the piston sections of the reciprocating linear displacement motor and the pump piston gives the theoretical pressure ratio between the reciprocating linear air motor and the paint feed pump.

Ce rapport de pression théorique entre le moteur pneumatique à déplacement linéaire alternatif et la pompe d'alimentation en peinture détermine ainsi la pression de sortie du produit engendrée par la pompe.This theoretical pressure ratio between the reciprocating linear air motor and the paint feed pump thus determines the output pressure of the product generated by the pump.

Les moteurs pneumatiques à déplacement linéaire alternatif fonctionnent avec l'énergie pneumatique délivrée par une alimentation d'air sous pression et sont reliés généralement à un échappement.Reciprocating linear air motors operate with the pneumatic energy delivered by a pressurized air supply and are generally connected to an exhaust.

Le mouvement des moteurs pneumatiques à déplacement linéaire alternatif peut être commandé par un système électromécanique comportant deux contacteurs de fin de course reliés à un distributeur d'air.The movement of the reciprocating linear displacement pneumatic motors can be controlled by an electromechanical system comprising two limit switches connected to an air distributor.

Ce distributeur d'air à grand débit dirige l'air sous pression alternativement dans la chambre supérieure ou la chambre inférieure du moteur pour provoquer la descente ou la montée du piston, tout en assurant l'échappement de l'air chassé de l'autre chambre, inférieure ou supérieure, du moteur.This high-flow air distributor directs the pressurized air alternately into the upper chamber or the lower chamber of the engine to cause the descent or the rise of the piston, while ensuring the escape of the air driven from the other chamber, lower or higher, the engine.

D'autres techniques de pilotage des moteurs pneumatiques à déplacement linéaire alternatif, fabriquées par la société de droit français KREMLIN REXSON, présentent des systèmes différents de pilotage de l'inversion du moteur : à moteur différentiel, à bloc inverseur, à interrupteur basculant.Other techniques for driving linear reciprocating pneumatic motors, manufactured by the French company KREMLIN REXSON, present different systems for controlling the inversion of the motor: with a differential motor, an inverter block and a rocker switch.

Tous ces systèmes connus de pilotage de l'inversion de sens des moteurs pneumatiques à déplacement linéaire alternatif font monter ou descendre le piston, en dirigeant l'air sous pression alternativement dans la chambre supérieure ou la chambre inférieure du moteur pour provoquer la descente ou la montée du piston, tout en assurant l'échappement de l'air chassé de l'autre chambre, inférieure ou supérieure, du moteur.All these known systems for reversing the direction of linear reciprocating pneumatic motors raise or lower the piston, directing the air under pressure alternately in the upper chamber or the lower chamber of the engine to cause the descent or the raising the piston, while ensuring the escape of the air driven from the other chamber, lower or upper, the engine.

On connaît des dispositifs de surveillance pour des moteurs pneumatiques à déplacement linéaire alternatif entraînant des pompes.Monitoring devices are known for linear reciprocating air motors driving pumps.

Le document WO 2007/016151 A2 décrit un procédé de pilotage d'une pompe actionnée par air comprimé, utilisant un aimant monté dans le tiroir du distributeur du moteur pneumatique et deux capteurs magnétiques montés dans le couvercle du distributeur pour observer la vitesse et la position du tiroir de ce distributeur.The document WO 2007/016151 A2 discloses a method of driving a pump powered by compressed air, using a magnet mounted in the air motor distributor spool and two magnetic sensors mounted in the dispenser cover to observe the speed and position of the spool valve spool.

Le document US 4 405 292 A divulgue une pompe actionnée par air comprimé, dans laquelle la référence 40 correspond à une source de pression d'air, la référence 104 correspond à une porte logique ET, la référence 108 correspond à une porte logique NON et la référence 112 correspond à une entrée de mémoire pneumatique.The document US 4,405,292A discloses a pump operated by compressed air, in which the reference 40 corresponds to an air pressure source, the reference 104 corresponds to an AND logic gate, the reference 108 corresponds to a logic gate NO and the reference 112 corresponds to an input of pneumatic memory.

Le document WO 2004/010096 décrit une pompe munie de capteurs mobiles autonomes en énergie.The document WO 2004/010096 describes a pump provided with mobile sensors autonomous in energy.

Le document DE 37 08 989 est relatif à un circuit pour faire fonctionner un piston actionné par une pression fluide, pour fixer une pièce de travail.The document DE 37 08 989 relates to a circuit for operating a piston actuated by a fluid pressure to fix a workpiece.

Le document EP 2 273 114 est relatif à une pompe alternative avec un piston et une vanne pneumatique surveillée par voie électronique. Cette pompe alternative comporte un capteur de position du piston.The document EP 2 273 114 is relative to an alternative pump with a piston and a pneumatic valve monitored electronically. This alternative pump comprises a piston position sensor.

Le but de l'invention est de perfectionner l'état de la technique connue, en proposant un nouveau système de surveillance d'une pompe à actionnement pneumatique à déplacement linéaire alternatif, de compréhension immédiate et d'utilisation simple.The object of the invention is to improve the known state of the art, by proposing a new monitoring system for a pneumatic pump with linear reciprocating movement, immediate understanding and simple use.

L'invention a pour objet un système de surveillance d'une pompe d'un produit liquide ou pâteux tel que défini dans la revendication 1.The subject of the invention is a system for monitoring a pump of a liquid or pasty product as defined in claim 1.

Selon d'autres caractéristiques alternatives de l'invention :

  • les moyens de transmission du signal représentatif de la pression pneumatique captée transmettent de préférence un signal électrique représentatif de la pression pneumatique captée à des moyens de gestion de pompe à actionnement pneumatique et à déplacement linéaire alternatif.
  • les moyens de gestion de pompe à actionnement pneumatique et à déplacement linéaire alternatif comportent une horloge ou un compteur apte à générer au moins un chronogramme représentatif de l'évolution de la pression pneumatique captée à partir du signal transmis représentatif de la pression pneumatique captée.
  • le système de surveillance comporte des moyens de mesure sur plusieurs périodes du signal de pression pneumatique, et des moyens de test et de validation de cette mesure uniquement si la fréquence du signal est constante.
  • le système de surveillance comporte des moyens de test et de validation par apprentissage effectué en cas de changement de buses sur le pistolet d'une pompe d'alimentation en peinture.
  • le système de surveillance comporte des moyens pour enregistrer la fréquence du signal de pression pneumatique, pour servir de référence pour filtrer les périodes d'amorçage, ou de montée en teinte , ou de travail par touches dite de « gachetage ».
According to other alternative features of the invention:
  • the means for transmitting the signal representative of the sensed pneumatic pressure preferably transmit an electrical signal representative of the sensed pneumatic pressure to pneumatically actuated and reciprocating linear pump management means.
  • the pump actuating means for pneumatic actuation and reciprocating linear displacement comprise a clock or a counter capable of generating at least one chronogram representative of the evolution of the pneumatic pressure sensed from the transmitted signal representative of the sensed pneumatic pressure.
  • the monitoring system comprises means for measuring over several periods of the pneumatic pressure signal, and means for testing and validating this measurement only if the frequency of the signal is constant.
  • the monitoring system comprises test and validation means by learning performed in case of change of nozzles on the gun of a paint supply pump.
  • the monitoring system comprises means for recording the frequency of the pneumatic pressure signal, to serve as a reference for filtering the periods of priming, or rise in tint, or working by so-called "gating" keys.

L'invention sera mieux comprise grâce à la description qui va suivre, donnée à titre d'exemple non limitatif en référence aux dessins annexés dans lesquels :

  • la figure 1 représente schématiquement une vue partielle d'un dispositif de surveillance selon l'invention d'un moteur pneumatique à déplacement linéaire alternatif entraînant une pompe.
  • la figure 2 représente schématiquement un chronogramme correspondant à la surveillance d'un moteur pneumatique à déplacement linéaire alternatif en fonctionnement normal au moyen d'un système selon l'invention comportant un dispositif de surveillance selon l'invention.
  • la figure 3 représente schématiquement un chronogramme correspondant à la surveillance d'un moteur pneumatique à déplacement linéaire alternatif en fonctionnement défectueux au moyen d'un système selon l'invention comportant un dispositif de surveillance selon l'invention.
  • la figure 4 représente schématiquement un chronogramme correspondant à la surveillance d'un moteur pneumatique à déplacement linéaire alternatif en fonctionnement défectueux au moyen d'un système selon l'invention comportant un dispositif de surveillance selon l'invention.
  • la figure 5 représente schématiquement un chronogramme correspondant à la surveillance d'un moteur pneumatique à déplacement linéaire alternatif en fonctionnement défectueux au moyen d'un système selon l'invention comportant un dispositif de surveillance selon l'invention.
The invention will be better understood from the following description given by way of non-limiting example with reference to the accompanying drawings, in which:
  • the figure 1 schematically represents a partial view of a monitoring device according to the invention of a reciprocating linear displacement pneumatic motor driving a pump.
  • the figure 2 schematically represents a timing chart corresponding to the monitoring of a reciprocating linear displacement pneumatic motor in normal operation by means of a system according to the invention comprising a monitoring device according to the invention.
  • the figure 3 schematically represents a chronogram corresponding to the monitoring of a reciprocating linear displacement pneumatic motor in defective operation by means of a system according to the invention comprising a monitoring device according to the invention.
  • the figure 4 schematically represents a chronogram corresponding to the monitoring of a reciprocating linear displacement pneumatic motor in defective operation by means of a system according to the invention comprising a monitoring device according to the invention.
  • the figure 5 schematically represents a chronogram corresponding to the monitoring of a reciprocating linear displacement pneumatic motor in defective operation by means of a system according to the invention comprising a monitoring device according to the invention.

En référence à la figure 1, un dispositif de surveillance pour un moteur pneumatique 1 à déplacement linéaire alternatif entraînant une pompe d'alimentation en peinture comporte des moyens 2 de capteur de pression pneumatique, des moyens 3 de transmission du signal représentatif de la pression pneumatique captée, et des moyens 4 de gestion de pompe à actionnement pneumatique à déplacement linéaire alternatif à partir du signal transmis représentatif de la pression pneumatique captée.With reference to the figure 1 , a monitoring device for a pneumatic motor 1 with reciprocating linear displacement driving a paint supply pump comprises means 2 of pneumatic pressure sensor, means 3 for transmitting the signal representative of the pneumatic pressure sensed, and means 4 AC pneumatic pump management system with linear displacement from the transmitted signal representative of the sensed pneumatic pressure.

Les moyens 2 de capteur de pression pneumatique comportent avantageusement un unique capteur de pression permettant de mesurer la pression de la chambre supérieure la du moteur pneumatique 1.The pneumatic pressure sensor means 2 advantageously comprise a single pressure sensor for measuring the pressure of the upper chamber 1a of the air motor 1.

Le capteur de pression pneumatique est situé à l'extérieur du moteur pneumatique 1 dans cet exemple.The pneumatic pressure sensor is located outside the pneumatic motor 1 in this example.

L'invention couvre également la variante non représentée, selon laquelle le capteur de pression pneumatique est situé à l'intérieur du moteur pneumatique 1.The invention also covers the variant not shown, according to which the pneumatic pressure sensor is located inside the pneumatic motor 1.

Les moyens 3 de transmission du signal représentatif de la pression pneumatique captée transmettent de préférence un signal électrique représentatif de la pression pneumatique captée à des moyens 4 de gestion de pompe à actionnement pneumatique à déplacement linéaire alternatif.The means 3 for transmitting the signal representative of the sensed pneumatic pressure preferably transmit an electrical signal representative of the pneumatic pressure sensed at means 4 of pneumatic actuation pump with reciprocating linear displacement.

Les moyens 4 de gestion de pompe à actionnement pneumatique à déplacement linéaire alternatif comportent une horloge ou un compteur apte à générer au moins un chronogramme représentatif de l'évolution de la pression pneumatique captée à partir du signal transmis représentatif de la pression pneumatique captée.The pneumatic actuation pump means 4 with reciprocating linear displacement comprise a clock or a counter capable of generating at least one chronogram representative of the evolution of the pneumatic pressure sensed from the transmitted signal representative of the sensed pneumatic pressure.

L'invention s'applique à la surveillance de tous systèmes connus de pilotage de l'inversion de sens des moteurs pneumatiques à déplacement linéaire alternatif entraînant une pompe d'alimentation, qui font monter ou descendre le piston, en dirigeant l'air sous pression alternativement dans la chambre supérieure ou la chambre inférieure du moteur pour provoquer la descente ou la montée du piston, tout en assurant l'échappement de l'air chassé de l'autre chambre, inférieure ou supérieure, du moteur.The invention applies to the monitoring of all known reversal direction control systems of linear reciprocating pneumatic motors driving a feed pump, which raise or lower the piston, directing the air under pressure alternatively in the upper chamber or the lower chamber of the engine to cause the descent or the rise of the piston, while ensuring the escape of the air driven from the other chamber, lower or higher, the engine.

Sur la figure 2, un chronogramme de mise en oeuvre du système selon l'invention de surveillance pour un moteur pneumatique 1 à déplacement linéaire alternatif entraînant une pompe d'alimentation en peinture décrit un fonctionnement normal de la pompe d'alimentation en peinture.On the figure 2 , a chronogram of implementation of the system according to the invention of monitoring for a pneumatic motor 1 with reciprocating linear displacement driving a paint supply pump describes a normal operation of the paint supply pump.

A partir de la mesure de pression faite dans la chambre du moteur pneumatique 1 à déplacement linéaire alternatif, le système selon l'invention de surveillance pour un moteur pneumatique 1 à déplacement linéaire alternatif calcule la fréquence du piston du moteur 1 pour en déduire par calcul le débit de la pompe d'alimentation en peinture, et calcule la valeur de pression d'air dans le moteur 1 pour en déduire par calcul la pression de la peinture en sortie de pompe d'alimentation.From the measurement of pressure made in the chamber of the pneumatic motor 1 with reciprocating linear displacement, the system according to the invention for monitoring a pneumatic motor 1 with reciprocating linear displacement calculates the frequency of the piston of the engine 1 to deduce therefrom the flow rate of the paint supply pump, and calculates the air pressure value in the engine 1 to deduce by calculation the pressure of the paint at the output of the feed pump.

Dans ce genre de pompe d'alimentation en peinture, le moteur pneumatique à déplacement linéaire alternatif à l'origine de la pression de sortie du produit subit un effort résistant de la pompe d'alimentation en peinture en fonction de la pression de sortie du produit engendrée par la pompe.In this type of paint supply pump, the reciprocating linear air motor causing the product outlet pressure is subjected to a resistant force of the paint supply pump depending on the outlet pressure of the product. generated by the pump.

Le chronogramme alternatif régulier de la figure 2 de la pression pneumatique P captée à partir du signal transmis en fonction du temps T correspond ainsi à un cycle alternatif régulier de la pression de sortie du produit engendrée par la pompe d'alimentation en peinture.The regular alternating chronogram of the figure 2 the pneumatic pressure P sensed from the transmitted signal as a function of time T thus corresponds to a regular alternating cycle of the product outlet pressure generated by the paint supply pump.

Sur la figure 3, un chronogramme de mise en oeuvre du système selon l'invention de surveillance pour un moteur pneumatique 1 à déplacement linéaire alternatif entraînant une pompe d'alimentation en peinture décrit un fonctionnement défectueux de la pompe d'alimentation en peinture.On the figure 3 , a chronogram of implementation of the system according to the invention for monitoring a pneumatic motor 1 reciprocating linear displacement driving a paint supply pump describes a defective operation of the paint supply pump.

Dans ce genre de pompe d'alimentation en peinture, le moteur pneumatique à déplacement linéaire alternatif à l'origine de la pression de sortie du produit subit un effort résistant de la pompe d'alimentation en peinture en fonction de la pression de sortie du produit engendrée par la pompe.In this type of paint supply pump, the reciprocating linear air motor causing the product outlet pressure is subjected to a resistant force of the paint supply pump depending on the outlet pressure of the product. generated by the pump.

Le chronogramme alternatif irrégulier de la figure 3 de la pression pneumatique P captée à partir du signal transmis en fonction du temps T correspond à une évolution traduisant une baisse sensible du temps de cycle de la pompe, dont la détection est effective quand le temps de cycle devient inférieur à une valeur de seuil prédéterminée ou calculée.The irregular alternating chronogram of the figure 3 the pneumatic pressure P sensed from the signal transmitted as a function of time T corresponds to an evolution reflecting a significant decrease in the cycle time of the pump, the detection of which is effective when the cycle time becomes less than a predetermined threshold value or calculated.

Cette détection effective d'une baisse sensible du temps de cycle de la pompe, traduit un emballement de la pompe, qui peut par exemple provenir d'un désamorçage de la pompe, ou d'un problème de cavitation.This effective detection of a significant decrease in the cycle time of the pump, indicates a runaway of the pump, which can for example come from a defusing of the pump, or a problem of cavitation.

Sur la figure 4, un chronogramme de mise en oeuvre du système selon l'invention de surveillance pour un moteur pneumatique 1 à déplacement linéaire alternatif entraînant une pompe d'alimentation en peinture décrit un fonctionnement défectueux de la pompe d'alimentation en peinture.On the figure 4 , a chronogram of implementation of the system according to the invention for monitoring a pneumatic motor 1 reciprocating linear displacement driving a paint supply pump describes a defective operation of the paint supply pump.

Dans ce genre de pompe d'alimentation en peinture, le moteur pneumatique à déplacement linéaire alternatif à l'origine de la pression de sortie du produit subit un effort résistant de la pompe d'alimentation en peinture en fonction de la pression de sortie du produit engendrée par la pompe.In this type of paint supply pump, the reciprocating linear air motor causing the product outlet pressure is subjected to a resistant force of the paint supply pump depending on the outlet pressure of the product. generated by the pump.

Le chronogramme alternatif irrégulier de la figure 4 de la pression pneumatique P captée à partir du signal transmis en fonction du temps T correspond à une évolution, dans laquelle le temps de refoulement T1 de la pression pneumatique P est supérieur au temps d'aspiration T2 de la pression pneumatique P.The irregular alternating chronogram of the figure 4 the pneumatic pressure P sensed from the transmitted signal as a function of time T corresponds to an evolution, in which the discharge time T1 of the pneumatic pressure P is greater than the suction time T2 of the pneumatic pressure P.

Cette détection effective d'une évolution, dans laquelle le temps de refoulement T1 de la pression pneumatique P est supérieur au temps d'aspiration T2 de la pression pneumatique P, provient d'une fuite du clapet haut d'alimentation en peinture de la pompe déplacement d'alimentation en peinture.This effective detection of an evolution, in which the discharge time T1 of the pneumatic pressure P is greater than the suction time T2 of the pneumatic pressure P, originates from a leakage of the top valve supplying the pump with paint. moving paint supply.

Sur la figure 5, un chronogramme de mise en oeuvre du système selon l'invention de surveillance pour un moteur pneumatique 1 à déplacement linéaire alternatif entraînant une pompe d'alimentation en peinture décrit un fonctionnement défectueux de la pompe d'alimentation en peinture.On the figure 5 , a chronogram of implementation of the system according to the invention for monitoring a pneumatic motor 1 reciprocating linear displacement driving a paint supply pump describes a defective operation of the paint supply pump.

Dans ce genre de pompe d'alimentation en peinture, le moteur pneumatique à déplacement linéaire alternatif à l'origine de la pression de sortie du produit subit un effort résistant de la pompe d'alimentation en peinture en fonction de la pression de sortie du produit engendrée par la pompe.In this type of paint supply pump, the reciprocating linear air motor causing the product outlet pressure is subjected to a resistant force of the paint supply pump depending on the outlet pressure of the product. generated by the pump.

Le chronogramme alternatif irrégulier de la figure 5 de la pression pneumatique P captée à partir du signal transmis en fonction du temps T correspond à une évolution, dans laquelle le temps de refoulement T1 de la pression pneumatique P est inférieur au temps d'aspiration T2 de la pression pneumatique P.The irregular alternating chronogram of the figure 5 the pneumatic pressure P sensed from the transmitted signal as a function of time T corresponds to an evolution, in which the discharge time T1 of the pneumatic pressure P is less than the suction time T2 of the pneumatic pressure P.

Cette détection effective d'une évolution, dans laquelle le temps de refoulement T1 de la pression pneumatique P est inférieur au temps d'aspiration T2 de la pression pneumatique P, provient d'une fuite du clapet bas d'alimentation en peinture de la pompe déplacement d'alimentation en peinture.This effective detection of an evolution, in which the discharge time T1 of the pneumatic pressure P is less than the suction time T2 of the pneumatic pressure P, comes from a leakage of the bottom valve for supplying the pump with paint. moving paint supply.

Une première variante de système selon l'invention de surveillance pour un moteur pneumatique 1 à déplacement linéaire alternatif entraînant une pompe d'alimentation en peinture comporte avantageusement des moyens de mesure sur plusieurs périodes du signal de pression pneumatique, et des moyens de test et de validation de cette mesure uniquement si la fréquence du signal est constante.A first variant of the system according to the invention for monitoring a pneumatic motor 1 with linear reciprocating displacement a paint feed pump advantageously comprises means for measuring over several periods of the pneumatic pressure signal, and means for testing and validating this measurement only if the frequency of the signal is constant.

Une deuxième variante de système selon l'invention de surveillance pour un moteur pneumatique 1 à déplacement linéaire alternatif entraînant une pompe d'alimentation en peinture comporte avantageusement des moyens de test et de validation par apprentissage. En cas de changement de buses sur le pistolet d'une pompe d'alimentation en peinture, le système de surveillance selon l'invention refait cet apprentissage
Les deux variantes de systèmes de surveillance selon l'invention pour un moteur pneumatique 1 à déplacement linéaire alternatif entraînant une pompe d'alimentation en peinture permettent d'éviter les détections erronées de fuites ou les erreurs de calcul de débit lors d'une phase d'amorçage ou de montée en teinte, ou lors d'une utilisation normale de travail par touches dite de « gachetage ».A second variant of the system according to the invention for monitoring a pneumatic motor 1 with reciprocating linear displacement driving a paint supply pump advantageously comprises means for testing and validation by learning. In the case of a change of nozzles on the gun of a paint supply pump, the monitoring system according to the invention remakes this training
The two variants of monitoring systems according to the invention for a pneumatic motor 1 with reciprocating linear displacement driving a paint supply pump make it possible to avoid erroneous leak detections or flow calculation errors during a phase of the invention. priming or rising tint, or during a normal use of work by so-called "gating" keys.

Chaque système selon l'invention de surveillance pour un moteur pneumatique 1 à déplacement linéaire alternatif enregistre ainsi la fréquence du signal qui servira de référence pour filtrer les périodes d'amorçage ou de montée en teinte , ou de travail par touches dite de « gachetage ».Each system according to the invention for monitoring a pneumatic motor 1 with reciprocating linear displacement thus records the frequency of the signal which will serve as a reference for filtering the periods of initiation or rise in hue, or work by keys known as "gachetage" .

Grâce à l'invention, un seul capteur de pression pneumatique d'une chambre d'un moteur pneumatique 1 à déplacement linéaire alternatif entraînant une pompe d'alimentation en peinture permet de calculer la fréquence du piston du moteur pneumatique en vue de la détection d'emballement, d'usure, ou de cavitation de la pompe d'alimentation en peinture, de tester si le temps de descente du piston est supérieur au temps de montée en vue de détecter une fuite du clapet haut de la pompe déplacement d'alimentation en peinture, de tester si le temps de montée du piston est supérieur au temps de descente en vue de détecter une fuite du clapet bas de la pompe déplacement d'alimentation en peinture, de calculer des valeurs de débit en différentes unités, et de calculer la pression de sortie du produit pompé.Thanks to the invention, a single pneumatic pressure sensor of a chamber of a linear reciprocating pneumatic motor 1 driving a paint supply pump makes it possible to calculate the frequency of the piston of the pneumatic motor for the detection of runaway, wear, or cavitation of the paint feed pump, test whether the piston descent time is greater than the rise time in order to detect leakage of the pump top valve displacement feed in painting, to test whether the rise time of the piston is greater than the descent time in order to detect a leakage of the bottom valve of the paint supply displacement pump, to calculate flow values in different units, and calculate the output pressure of the pumped product.

L'invention, décrite en référence à des modes de réalisation particuliers, ne leur est nullement limitée, mais couvre au contraire toute modification de forme et toute variante de réalisation dans le cadre de l'invention comme revendiquée ci-dessous.The invention, described with reference to particular embodiments, is in no way limited to them, but on the contrary covers any modification of form and any variant embodiment within the scope of the invention as claimed below.

Claims (9)

  1. Monitoring system for a pump for a liquid or paste product such as a paint, said pump being a pneumatically actuated reciprocating linear displacement pump, the pneumatic actuation being effected by a pneumatic motor, the system comprising sensor means (2) for the pneumatic pressure of the pneumatic motor, means for transmitting the signal representing the sensed pneumatic pressure of the pneumatic motor, and means for managing the pump for liquid or paste product, with pneumatic actuation and reciprocating linear displacement, on the basis of the transmitted signal representing the sensed pneumatic pressure of the pneumatic motor, the system further comprising computation means for deriving the throughput of the paint delivery pump and the pressure of the paint at the outlet of the delivery pump.
  2. Monitoring system according to claim 1, wherein the means (3) for transmitting the signal representing the sensed pneumatic pressure preferably transmit an electrical signal representing the sensed pneumatic pressure to means (4) for managing the pneumatically actuated reciprocating linear displacement pump.
  3. Monitoring system according to claim 1 or 2, wherein the means (4) for managing the pneumatically actuated reciprocating linear displacement pump comprise a clock or a counter capable of generating at least one timing diagram representing the evolution of the sensed pneumatic pressure from the transmitted signal representing the sensed pneumatic pressure.
  4. Monitoring system according to claim 1 or 2, comprising means for measuring, over a plurality of periods, the pneumatic pressure signal, and means for testing and validating that measurement only if the frequency of the signal is constant.
  5. Monitoring system according to claim 1 or 2, comprising means for testing and validating by learning carried out in the case of a change of nozzle on the spray gun of a paint delivery pump.
  6. Monitoring system according to claim 1 or 2, comprising means for recording the frequency of the pneumatic pressure signal, to serve as reference for filtering the periods of priming, or of increase in hue, or of working by so-called "spotting" touches.
  7. Monitoring system according to claim 1, wherein the pneumatic pressure sensor means (2) comprise a single pressure sensor for measuring the pressure of a chamber (1a) of the pneumatic motor (1).
  8. Monitoring system according to claim 7, wherein the pneumatic pressure sensor is situated outside the pneumatic motor (1).
  9. Monitoring system according to claim 7, wherein the pneumatic pressure sensor is situated inside the pneumatic motor (1).
EP12705372.6A 2011-01-27 2012-01-24 System for monitoring a pneumatically-actuated alternating linear displacement pump Active EP2668400B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1150644A FR2971019B1 (en) 2011-01-27 2011-01-27 DEVICE AND SYSTEM FOR MONITORING AN ALTERNATING LINEAR DISPLACEMENT PNEUMATIC ACTUATING PUMP.
PCT/FR2012/050158 WO2012101379A1 (en) 2011-01-27 2012-01-24 Device and system for monitoring a pneumatically-actuated alternating linear displacement pump

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EP2668400B1 true EP2668400B1 (en) 2019-05-15

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KR (1) KR101857843B1 (en)
CN (1) CN103348136B (en)
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BR (1) BR112013016450A2 (en)
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US20230358218A1 (en) * 2022-04-08 2023-11-09 Embark Innovations Pneumatic Pump

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EP2668400A1 (en) 2013-12-04
US10626862B2 (en) 2020-04-21
WO2012101379A1 (en) 2012-08-02
CN103348136A (en) 2013-10-09
EA029288B1 (en) 2018-03-30
AR084923A1 (en) 2013-07-10
MX2013005656A (en) 2013-07-17
CN103348136B (en) 2016-08-10
FR2971019A1 (en) 2012-08-03
US20130189122A1 (en) 2013-07-25
EA201391080A1 (en) 2013-12-30
MX337185B (en) 2016-02-16
KR20130141653A (en) 2013-12-26
KR101857843B1 (en) 2018-06-20
FR2971019B1 (en) 2016-01-15
BR112013016450A2 (en) 2020-11-03

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