EP2203649B1 - Procédé et dispositif pour l'indication de position d'accessoires de robinetterie à commande hydraulique - Google Patents

Procédé et dispositif pour l'indication de position d'accessoires de robinetterie à commande hydraulique Download PDF

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Publication number
EP2203649B1
EP2203649B1 EP08801637.3A EP08801637A EP2203649B1 EP 2203649 B1 EP2203649 B1 EP 2203649B1 EP 08801637 A EP08801637 A EP 08801637A EP 2203649 B1 EP2203649 B1 EP 2203649B1
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Prior art keywords
pressure medium
pulses
line
armature
pressure
Prior art date
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EP08801637.3A
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German (de)
English (en)
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EP2203649A1 (fr
Inventor
Michael Middelanis
Stephan Quinkert
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Pleiger Maschinenbau & Co KG GmbH
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Pleiger Maschinenbau & Co KG GmbH
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Priority to PL08801637T priority Critical patent/PL2203649T3/pl
Publication of EP2203649A1 publication Critical patent/EP2203649A1/fr
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Classifications

    • 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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2838—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT with out using position sensors, e.g. by volume flow measurement or pump speed

Definitions

  • the invention relates to a method and a device for the position indicator of hydraulically actuated valves, in particular in shipbuilding, which are acted upon via a hydraulic line from a central control point with pressure medium.
  • the indication of the position of such hydraulically actuated valves is made about the intake volume of the valve, which can be arranged on a ship at a distance of for example 200 m from the central control unit.
  • the compressibility of the pressure medium affects the accuracy of the position indicator. That's the way it is for example DE 44 29 019 known to provide a complex hydraulic circuit to compensate for the inaccuracy of the position indicator generated by the compressibility of the pressure medium.
  • DE 20 2004 018 420 U1 describes a hydraulic drive device with a piston-cylinder unit, which is connected via a feed line and a return line to a pressure source, wherein in the return line, a quantity detecting means is arranged, by means of which the amount of hydraulic fluid flowing through the line during a stroke of the piston is detected, be it by a single signal or by a sum of electrical impulses.
  • the displaced during a load stroke amount of hydraulic fluid is set equal to the displaced in a return stroke amount to cause a comparison of the two amounts, a switching of the switching valve.
  • US 2001/037689 A1 describes a method and an apparatus for measuring the position, velocity and / or acceleration of a piston in a hydraulic actuator based on a differential pressure measurement in which the pressure in front of and behind a diaphragm or flow path constriction is determined and from which the flow rate is determined; which flows through the sensor.
  • the signals emitted by the flow sensor correspond to pressure signals from which the flow rate is calculated.
  • the object of the invention is to provide the display of the position of hydraulically actuated valves of the type described in such a way that with little effort, a high accuracy of the position indicator is achieved
  • the influence of the compressibility of the pressure medium is determined and compensated for in one embodiment by the fact that when switching the pressure medium line as the pressure-carrying pressure line occurring during the adjusting movement of the valve higher
  • the difference in the number of pulses corresponds to the influence of the compressibility.
  • the pulses are counted at a predetermined travel when the pressure medium line is connected as a pressure line, whereupon the pressure line is depressurized and the pulses occurring during decompression are counted.
  • the number of pulses corresponding to the compressibility is disregarded in the further actuating movements of the valve in order to compensate for the influence of the compressibility.
  • a unit which, for example, comprises a rotary flap 1.1 arranged in a pipe, not shown, which is adjusted by a setting cylinder 1.2, for example via a toothed rack, which is connected on opposite sides with hydraulic or pressure medium lines 2 and 3.
  • check valves 1.3 and pressure relief valves 1.4 are arranged in a conventional circuit.
  • a central control unit is shown schematically, at which a larger number of valves is controlled, which may be located at a greater distance from the control unit.
  • a known control valve 4.1 is arranged for each valve by which one or the other side of the actuating cylinder 1.2 is acted upon by pressure medium, while the respective other pressure medium line 2 and 3 is switched as a return line.
  • P the hydraulic line connected to a pressure medium source, not shown
  • T is the return line leading to a reservoir, not shown.
  • a flow sensor 5 is arranged in one of the two pressure medium lines 2 or 3, which converts the flow of pressure fluid flowing through the line into a series of electrical pulses, which are indicated at 5a.
  • the flow sensor 5 may, for example, have a wheel driven by the flow of pressure medium, which generates electrical impulses without contact via Hall sensors. Such Flow sensors or measuring devices are known per se.
  • the signals emitted by the flow sensor 5 may be, for example, rectangular signals, as shown schematically at 5a, wherein a pulse corresponds to a predetermined volume unit of the pressure medium.
  • a pulse can correspond to a volume unit of, for example, 0.05 cm 3 of the pressure medium flowing through the line.
  • a control and display unit with a display 6.1 and control buttons 6.2 is designated, which is connected via first electrical lines 6.3 at a and b with the opposite sides of the control valve 4.1, which is connected by one solenoid in one or the other position becomes. Furthermore, the display unit 6 is connected via second electrical lines 6.41 and 6.42 with the flow sensor 5, are passed through the different pulses corresponding to the flow direction of the pressure medium to the display unit 6 and to a program provided therein in which the signals or pulse counts are processed , With 6.5 electrical lines for powering the display unit 6 are designated.
  • the flow direction of the pressure medium can be identified on the basis of the pulse sequences.
  • the direction of flow of the pressure medium is detected by means of a directional logic as open or closed position.
  • 6.41 pulses are transmitted in the flow in the other direction via the one electrical line in the case of flow of the pressure medium in one direction and via the electrical line 6.42.
  • the distinction between flow and return in the pressure medium line 2 results essentially by the direction of rotation of the wheel in the flow sensor 5 and by the direction of rotation detection on the pulse generator, whether it rotates to the right or to the left.
  • the compressibility can be determined in the manner that the number of pulses is counted at a full travel of the piston in the actuating cylinder 1.2 when the pressure medium line 2 is connected as a pressure-carrying pressure line, and in the same manner the number of pulses is counted when the pressure medium line 2 is connected as a non-pressurized return line, the difference in the two determined pulse counts at the same travel corresponds to the compressibility.
  • only the number of pulses is stored, which is determined during expansion of the pressure line, while in the other embodiment, the number of pulses during the closing and opening process is stored and offset against each other. It is also possible to combine both embodiments in the program.
  • the program processing the pulses is expediently designed as a learning program, wherein after installation of the position indicator, predetermined program steps take place, by which the position indicator itself adjusts to the respective valve including the type of pipeline. This eliminates a time-consuming adjustment of the position indicator to the often very different in the displacement valves and the different cable lengths and cable cross-sections.
  • the control valve 4.1 is adjusted by the program in the control and display unit 6 in the end position via one of the electrical lines 6.3 to start an end position of the valve, for example, to start the closed position, so that with the Positioning cylinder 1.2 associated flap on the pressure line connected as a pressure line 3 is moved into the closed position.
  • This end position can be specified as the starting position for the counting of occurring pulses.
  • the valve is moved from the program to the other end position, in this embodiment in the open position, wherein the pressure medium line 2 is switched as a pressure line and the pulses occurring during the adjusting movement in the open position are counted.
  • the control valve 4.1 is adjusted by the program in the middle position and thus the pressure line 2 is depressurized, with the pressure medium in the line 2 relaxes.
  • a return flow occurs in the line 2, which corresponds to the decompression of the pressure medium and is determined by counting the pulses occurring in terms of its volume.
  • the number of pulses that was measured during the decompression of the pressure medium when the pressure medium line 2 is switched again as a pressure line. In other words, the number of pulses corresponding to the decompression is subtracted from the previously measured total number of pulses in order to obtain the corresponding number of pulses for the given travel.
  • the influence of the compressibility can also be determined by counting and storing the number of pulses that occur in a full travel of the piston in the actuating cylinder when the pressure medium line 2 is switched as a pressure line and a return line. The difference between the measured pulse numbers indicates the influence of the compressibility of the pressure medium.
  • This learning or testing program is preferably carried out automatically before each start-up or after a repair of the valve to determine the corresponding pulse numbers. By running the test program before each startup, any errors that have occurred can be detected. When the test program is executed after a valve repair, the plant operator does not need to re-adjust the position indicator to the existing system.
  • the test program is preferably carried out even when intermediate positions of the valve are approached.
  • the pressure medium line 2 is connected, for example, as a pressure line to move the actuating cylinder 1.2 in a predetermined intermediate position, wherein the occurring number of pulses is counted. Then the flap or the actuating cylinder is fixed in the intermediate position reached and the pressure medium line 2 is depressurized, wherein the pulse number occurring during the decompression of the pressure medium is measured. If the valve is to be moved back into the same or any other intermediate position, the influence of the compressibility occurring is compensated for by disregarding the number of pulses determined during decompression.
  • the display unit 6 is specified in the program that a pulse number of, for example, "five" per unit time for the position indicator is disregarded, it being assumed in this example that five pulses correspond to a change in volume of the pressure medium at a higher or lower temperature compared to normal operating temperature.
  • a temperature sensor can be provided on the flow sensor 5 and / or on the control cylinder 1.2, which transmits the corresponding measured values to the program in the display unit 6.
  • leaks in the hydraulic system can be detected and displayed on the display unit 6, for example, if in the closed position of the valve impulses continue to occur, or the measured number of pulses no longer coincides with that before commissioning by the test program as that number of pulses which corresponds to a full travel. As a result, the reliability is increased by fault detection.
  • the program in the display unit 6 can also be designed to control the valve in such a way that on the display 6.1 an intermediate position of the valve can be selected, for example, 40%, whereupon the control is triggered by one of the control buttons. The valve is then automatically moved to the intermediate position of 40% and held in this position when reaching the intermediate position.
  • the control valve 4.1 is controlled via the electrical lines 6.3 until the predetermined intermediate position is reached, whereupon the power supply of the control valve 4.1 is interrupted by the program.
  • the display unit 6 also serves as a control unit, wherein for the control of the valve via the control valve 4.1, the previously determined pulse data from the flow sensor 5 are processed by the program.
  • the display device described is not only in shipbuilding of great advantage, because with simple means a precise position indicator can be achieved.
  • the display device can also be used in industrial plants, for example in refineries. She is also at relatively short lines of eg 20 m between the control point and fitting can be used, in which the compressibility by different numbers of pulses between pressure leading and unpressurized return makes noticeable.
  • the display device can also be provided in a hydraulically operated valve, which is supplied with pressure medium only via a pressure medium line, wherein the piston acted upon with pressure medium in the actuating cylinder 1.2 operates against a spring which causes a return of the piston when the pressure medium line is switched to return ,
  • the piston can be fixed in the actuating cylinder in the position with cocked spring, so that when Drucklosschalt the pressure medium line occurring by decompression of the pressure medium pulse number can be measured, which corresponds to the influence of the compressibility on the position indicator.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Measuring Fluid Pressure (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Claims (8)

  1. Procédé pour l'indication de la position d'une robinetterie à commande hydraulique avec un cylindre de réglage (1.2) destiné à commander la robinetterie (1.1) et relié par deux conduites de fluide sous pression (2, 3) à une soupape de réglage (4.1), par laquelle les conduites de fluide sous pression peuvent être commutées entre la conduite montante conduisant la pression et la conduite de retour sans pression,
    l'écoulement du fluide sous pression s'écoulant par l'une des conduites de fluide sous pression étant converti en un nombre d'impulsions électriques, dont chacune correspond à une unité de volume prescrite du fluide sous pression, et le nombre d'impulsions reproduisant l'écoulement étant traité dans un programme d'une unité d'indication (6) pour la compensation de la compressibilité du fluide sous pression, ledit procédé comprenant les étapes suivantes
    - déterminer la différence du nombre des impulsions électriques qui se produit pour une course de réglage identique de la robinetterie dans la conduite de fluide sous pression si celle-ci est montée comme une conduite montante conduisant la pression et comme une conduite de retour sans pression,
    - mettre sur le même plan cette différence constatée du nombre d'impulsions avec le volume de compressibilité du fluide sous pression, et
    - traiter le nombre d'impulsions reproduisant l'écoulement dans le programme de l'unité d'indication (6) de telle manière que le nombre d'impulsions survenant pour une course de réglage prescrite soit calculé pour un écoulement sans pression dans la conduite de fluide sous pression comme la même course de réglage si la conduite de fluide sous pression est montée comme une conduite sous pression en intégrant la différence du nombre d'impulsions
  2. Procédé selon la revendication 1, le programme entreprenant automatiquement une adaptation de l'indication de position au volume d'absorption de la robinetterie respective.
  3. Procédé selon la revendication 2, le programme entreprenant une vérification ou une adaptation de l'indication de la position lors de la mise en service de la robinetterie
  4. Procédé selon l'une quelconque des revendications précédentes, la robinetterie étant déplacée dans une première position finale qui est considérée comme une position de départ,
    étant déplacée de cette première position finale à une seconde position finale et le nombre d'impulsions survenant alors étant mesuré et enregistré,
    la robinetterie étant déplacée de nouveau de la seconde position finale à la première position finale et le nombre d'impulsions survenant alors étant mesuré et enregistré, les deux nombres d'impulsions mesurés étant comparés et le nombre d'impulsions pour l'autre indication de la position de la robinetterie étant prescrit comme correspondant à la course de réglage entière, lequel nombre correspond au plus petit nombre d'impulsions
  5. Procédé selon l'une quelconque des revendications 1 à 3,
    la robinetterie étant déplacée d'une première position à une seconde position et les impulsions survenant dans la conduite de fluide sous pression montée comme une conduite montante conduisant la pression étant alors comptées et enregistrées,
    suite à quoi la conduite de fluide sous pression est montée comme une conduite de retour sans pression et les impulsions survenant lors de la décompression du fluide sous pression sont comptées et enregistrées, lesquelles sont mises sur le même plan que le volume de compression du fluide sous pression.
  6. Procédé selon la revendication 5,
    le nombre d'impulsions étant compté, lesquelles surviennent lors du déplacement de la robinetterie d'une position de départ à une position finale dans la conduite montante conduisant la pression,
    suite à quoi la soupape de réglage (4 1) est déplacée dans la position médiane et ainsi la conduite montante conduisant la pression est montée sans pression,
    les impulsions étant comptées, lesquelles se produisent lors de la détente du fluide sous pression
  7. Dispositif pour l'indication de la position d'une robinetterie à commande hydraulique comprenant
    un cylindre de réglage (1.2) destiné à commander la robinetterie (1.1) et relié par des conduites de fluide sous pression (2, 3) à une soupape de réglage (4 1), par laquelle les conduites de fluide sous pression peuvent être commutées entre la conduite montante conduisant la pression et la conduite de retour sans pression
    un capteur de débit (5) disposé dans l'une des conduites de fluide sous pression (2) qui convertit l'écoulement du fluide sous pression dans la conduite de fluide sous pression en impulsions électriques de sorte qu'une impulsion corresponde à une unité de volume prescrite du fluide sous pression,
    le capteur de débit (5) étant relié à une unité d'affichage (6) électronique, dans laquelle un programme pour le traitement des impulsions est prévu, lequel tient compte du nombre d'impulsions correspondant à la compressibilité du fluide sous pression lors de l'indication de position.
  8. Dispositif selon la revendication 7, le programme comptant les impulsions qui surviennent et comparant les nombres d'impulsions qui se produisent pour un écoulement dans la conduite de fluide de pression dans un sens et dans le sens contraire
EP08801637.3A 2007-09-07 2008-08-20 Procédé et dispositif pour l'indication de position d'accessoires de robinetterie à commande hydraulique Active EP2203649B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08801637T PL2203649T3 (pl) 2007-09-07 2008-08-20 Sposób i urządzenie do wskazywania położenia uruchamianych hydraulicznie armatur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007042757A DE102007042757A1 (de) 2007-09-07 2007-09-07 Verfahren und Vorrichtung zur Stellungsanzeige von hydraulisch betätigten Armaturen
PCT/EP2008/006856 WO2009033553A1 (fr) 2007-09-07 2008-08-20 Procédé et dispositif pour l'indication de position d'accessoires de robinetterie à commande hydraulique

Publications (2)

Publication Number Publication Date
EP2203649A1 EP2203649A1 (fr) 2010-07-07
EP2203649B1 true EP2203649B1 (fr) 2013-10-09

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EP08801637.3A Active EP2203649B1 (fr) 2007-09-07 2008-08-20 Procédé et dispositif pour l'indication de position d'accessoires de robinetterie à commande hydraulique

Country Status (16)

Country Link
US (1) US8939061B2 (fr)
EP (1) EP2203649B1 (fr)
JP (1) JP5305110B2 (fr)
KR (1) KR101255416B1 (fr)
CN (1) CN101889147B (fr)
BR (1) BRPI0816481B1 (fr)
DE (1) DE102007042757A1 (fr)
DK (1) DK2203649T3 (fr)
ES (1) ES2435590T3 (fr)
HK (1) HK1150644A1 (fr)
HR (1) HRP20140014T1 (fr)
MY (1) MY161970A (fr)
PL (1) PL2203649T3 (fr)
PT (1) PT2203649E (fr)
RU (1) RU2478838C2 (fr)
WO (1) WO2009033553A1 (fr)

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
US20120124989A1 (en) * 2010-11-24 2012-05-24 Doll Robert A Hydraulic Power Unit With Auto-Load Sensing
DE102012222074A1 (de) * 2012-12-03 2014-06-05 Pleiger Maschinenbau Gmbh & Co. Kg Verfahren und vorrichtung zur stellungsanzeige von hydraulisch betätigten armaturen
CN103758822A (zh) * 2013-12-30 2014-04-30 北京市三一重机有限公司 盾构机及其油缸位移检测装置

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GB275844A (en) 1926-10-30 1927-08-18 Leon Stouffs Improvements in pneumatic apparatus for producing pulsations
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JPS46249Y1 (fr) * 1966-10-06 1971-01-07
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GB1275844A (en) * 1970-04-30 1972-05-24 Mitsubishi Jukoyo Kabushiki Ka Flow meter type valve-position indicator
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Also Published As

Publication number Publication date
JP5305110B2 (ja) 2013-10-02
US20100282067A1 (en) 2010-11-11
DK2203649T3 (da) 2013-12-09
HK1150644A1 (en) 2012-01-06
PT2203649E (pt) 2013-11-21
ES2435590T3 (es) 2013-12-20
MY161970A (en) 2017-05-31
BRPI0816481A2 (pt) 2015-03-17
RU2478838C2 (ru) 2013-04-10
RU2010113508A (ru) 2011-10-20
CN101889147A (zh) 2010-11-17
PL2203649T3 (pl) 2014-03-31
JP2010538224A (ja) 2010-12-09
WO2009033553A1 (fr) 2009-03-19
KR101255416B1 (ko) 2013-04-17
CN101889147B (zh) 2013-11-20
EP2203649A1 (fr) 2010-07-07
DE102007042757A1 (de) 2009-03-26
US8939061B2 (en) 2015-01-27
HRP20140014T1 (hr) 2014-01-31
KR20100051740A (ko) 2010-05-17
BRPI0816481B1 (pt) 2020-06-02

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