EP0915256A2 - Dispositif de commande de démarrage et d'arrêt d'une pompe hydraulique - Google Patents

Dispositif de commande de démarrage et d'arrêt d'une pompe hydraulique Download PDF

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Publication number
EP0915256A2
EP0915256A2 EP98500236A EP98500236A EP0915256A2 EP 0915256 A2 EP0915256 A2 EP 0915256A2 EP 98500236 A EP98500236 A EP 98500236A EP 98500236 A EP98500236 A EP 98500236A EP 0915256 A2 EP0915256 A2 EP 0915256A2
Authority
EP
European Patent Office
Prior art keywords
moving part
detector
pump
pressure
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98500236A
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German (de)
English (en)
Other versions
EP0915256A3 (fr
EP0915256B1 (fr
Inventor
Fernando Banus Garcia
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Individual
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Individual
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Filing date
Publication date
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Publication of EP0915256A2 publication Critical patent/EP0915256A2/fr
Publication of EP0915256A3 publication Critical patent/EP0915256A3/fr
Application granted granted Critical
Publication of EP0915256B1 publication Critical patent/EP0915256B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F04B49/02—Stopping, starting, unloading or idling control
    • 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
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/09—Flow through the pump

Definitions

  • the present invention relates to an apparatus for controlling the starting and stopping of a hydraulic pump that permits regulation of the hydrostatic pressure, while ensuring perfect operation of the hydraulic pump even in the event of failure of any of the sensors.
  • apparatus for controlling the starting and stopping of a hydraulic pump that include a chamber with an inlet and an outlet.
  • a check valve closes off the outlet and is associated with a sensor, which sends a signal to a control device when the check valve is open.
  • the aforesaid apparatus also include another sensor for capturing the hydraulic pressure inside the apparatus, which also sends a signal to the control device upon reaching a certain value. When there is no water flowing through the circuit the first sensor ceases sending a signal, leading to stoppage of the apparatus.
  • Said apparatus present the disadvantage of taking account only of incorrect operation of the pump when there is no water in the circuit, while they take no account of cases of incorrect operation due to defect, wear or breakage of the sensors. It is thus possible for the pump to be operating continuously when it should not be doing so, without the sensors detecting the situation, and this can lead to damage of the pump.
  • the aforesaid disadvantage must be considered to be a major disadvantage, since with the passage of time it has been found that 90% of failure in the aforesaid apparatus have been due to faults in the electronics of the control devices.
  • said apparatus also present the disadvantage that they only work at the rated pressure of the pump, regulation of hydraulic pressure not being possible.
  • Also known are other apparatus for controlling the starting and stopping of a hydraulic pump that include a flow detector which, in the absence of flow, provides a pump-stop signal, a pressure detector which for a predetermined minimum pressure reading provides a pump-start signal, and means for urging the pressure detector.
  • Said pressure detector includes a moving part integral with a membrane arranged in a cavity which communicates with the hydraulic circuit, and a fixed part arranged inside the housing of the apparatus in the position of displacement of the moving part.
  • the means that urge the moving part of the pressure detector include a spring mounted between said moving part and the housing, while the flow detector includes a moving part which can move vertically that functions as a gravity-operated shutoff valve and a fixed part arranged in the housing.
  • the apparatus of the invention succeeds in resolving the aforesaid disadvantages, while providing other advantages which will be described below.
  • the apparatus for controlling the starting and stopping of a hydraulic pump of the invention includes a flow detector which, in the absence of flow, provides a pump-stop signal; a pressure detector which has a moving part associated with a membrane and a fixed part mounted in the housing of the apparatus in the position of displacement of the moving part, the flow detector also being provided with a moving part that functions as a shutoff valve, and a fixed part mounted in the housing of the apparatus, said fixed parts being magnetic sensors; and means for urging the pressure detector; and is characterized in that it includes means for regulating the hydrostatic pressure, mounted inside the apparatus.
  • the feed pressure of the hydraulic line can thus be regulated in function of the flow of water through the interior of the apparatus.
  • the magnetic sensors are connected in such a way that if at least one of said sensors opens the circuit that supplies signal to the hydraulic pump, then the pump will stop.
  • This system achieves a remarkable increase in the safety of the apparatus controlling the hydraulic pump, since it takes account of possible faulty operation of one of the magnetic sensors and not only of the non-presence of water in the hydraulic circuit. Thus, if one of the magnetic sensors opens the circuit providing signal to the hydraulic pump then the pump will stop, since said sensors operate in series.
  • the moving part of the pressure detector and the moving part of the flow detector include a magnet.
  • the magnet of the moving part of the pressure detector provides a magnetic signal to its corresponding sensor, while the magnet of the moving part of the flow detector provides a signal to its sensor and to the pressure detecting sensor.
  • the sensitivity levels of the sensors and of the magnetic fields generated by the magnets of the moving parts of the detectors have been selected so that the pressure detecting sensor sends signal to the hydraulic pump when the magnetic fields generated by the magnet of the moving part of the pressure device and by the magnet of the moving part of the flow detector are added together, and the flow detector sensor sends signal to the pump by the action of the magnetic field generated solely by the magnet of the moving part of the flow detector.
  • the means for regulating the hydrostatic pressure include an element for closing an opening made in a wall separating two cavities present inside the apparatus.
  • the position of the closing element with respect to the opening made in the wall varies, so that if said demand increases the closing element is moved away from the opening, while if on the contrary the external demand is reduced, the closing element moves closer thereto. In this way, it increases or reduces the through-flow and maintains a constant regulated pressure at all times, independently of the external demand originated from the utilization points of the hydraulic line fed by the pump.
  • Said closing element is attached to the moving part of the pressure detector.
  • the moving part of the pressure detector acts together with the means for regulating the hydrostatic pressure, so that the closing element opens to a greater or less extent depending on the pressure detected by the pressure detector.
  • the apparatus includes a timing element associated with a control device, especially a relay or a triac.
  • Said timing element serves to keep the pump feed circuit closed when the pump is switched on or off. If no water reaches the apparatus during a preset time (approximately 7 seconds) immediately following switching the pump on or off the control device opens (electronic circuit open) and the pump switches off as a protective measure.
  • the means for urging the pressure detector include a spring attached to the membrane.
  • the membrane receives hydraulic pressure on its surface and acts on the spring.
  • the invention refers also to an apparatus for controlling the starting and stopping of a hydraulic pump, including a flow detector which, in the absence of flow, provides a pump-stop signal; a pressure detector which has a moving part associated with a membrane and a fixed part mounted in the housing of the apparatus in the position of displacement of the moving part, the flow detector also being provided with a moving part, which functions as a shutoff valve, and a fixed part mounted in the housing of the apparatus, said fixed parts being magnetic sensors; and means for urging the pressure detector, characterized in that the magnetic sensors are connected in such a way that if at least one of said sensors opens the circuit that supplies signal to the hydraulic pump, then the pump will stop.
  • the single figure is a longitudinal section view of an apparatus according to the invention for controlling the starting and stopping of a hydraulic pump.
  • the apparatus 1 for controlling the starting and stopping of a hydraulic pump includes a housing 2 which presents an inlet opening 3 and an outlet opening 4, a pressure detector 5, a flow detector 6, and a spring 7 for urging the pressure detector 5.
  • the apparatus is arranged vertically, but in its working position it has to be placed horizontal, with the inlet opening 3 at the bottom and the outlet opening 4 at the top thereof.
  • a seal 8 On which rests a valve 9 which acts as a flow detector 6, the valve having a permanent magnet 10 inside its shaft 11. In a certain position, said permanent magnet 10 excites two magnetic sensors 12, 13.
  • the pressure detector 5 includes a membrane 14 on whose surface the hydrostatic pressure acts, and a shaft 15 associated with the membrane 14, which is attached to a valve 16 that acts as hydrostatic pressure regulator.
  • Said valve 16 presents a projecting member 17 that has on its free end a permanent magnet that in a certain position excites one of the magnetic sensors 13 mentioned in the previous paragraph.
  • said valve 16 On its side opposite that of the shaft 15, said valve 16 also has a spring 19 for returning the valve 16 to its rest position.
  • the apparatus 1 also includes two cavities 20, 21 separated by a wall 22 that has an opening 23 approximately in its central portion.
  • the shaft 15 urged by the membrane 14 travels through the inside of said opening.
  • the apparatus 1 further includes a relay 24 and a timing element (not shown).
  • the apparatus 1 therefore operates as follows:
  • Said valve 9 has the permanent magnet 10 in its shaft 11, so that the generated magnetic field excites the two magnetic sensors 12, 13 of the electronic circuit of the apparatus 1.
  • valve 9 of the flow detector 6 continues to send signal to the two magnetic sensors 12, 13 and the pump remains operational.
  • the electronic circuit 24a connects the pump and keeps it in operation as long as both sensors remain closed.
  • the electronic circuit 24a connects during 5 to 7 seconds, starting the pump. If after that timing period the sensor 13 has not received signal from the valve 9, the pump stops. On the other hand, if after the aforesaid timing period the valve 9 rises due to the flow of water (it gives signal to both sensors 12, 13), the pump continues to operate until either of said sensors ceases to give out a signal. Once the taps have been closed, the pump stops after going through the steps described above.
  • the pressure regulator operates as described below.
  • the water flows through the opening which connects the chambers 20, 21.
  • the opening of the valve 16 depends on the hydrostatic pressure, which by acting upon the membrane 14 regulates the flow through said opening 23.
  • the valve closes.
  • Said pressure depends at all times on the force exerted by the spring 7 on the membrane 14, which is a function of the compression to which the spring is subjected by means of an adjustment bolt 25.
EP19980500236 1997-11-04 1998-10-29 Dispositif de commande de démarrage et d'arrêt d'une pompe hydraulique Expired - Lifetime EP0915256B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES9702281 1997-11-04
ES9702281A ES2149667B1 (es) 1997-11-04 1997-11-04 Aparato para el control del arranque y paro de una bomba hidraulica.

Publications (3)

Publication Number Publication Date
EP0915256A2 true EP0915256A2 (fr) 1999-05-12
EP0915256A3 EP0915256A3 (fr) 2000-05-03
EP0915256B1 EP0915256B1 (fr) 2004-08-25

Family

ID=8301054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980500236 Expired - Lifetime EP0915256B1 (fr) 1997-11-04 1998-10-29 Dispositif de commande de démarrage et d'arrêt d'une pompe hydraulique

Country Status (4)

Country Link
EP (1) EP0915256B1 (fr)
DE (1) DE69825839T2 (fr)
ES (2) ES2149667B1 (fr)
PT (1) PT915256E (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479911A1 (fr) * 2003-05-23 2004-11-24 Enrico Raddi Petite unité avec chambre d'équilibrage pour un système domestique d'alimentation en eau
WO2005035985A1 (fr) * 2003-10-17 2005-04-21 Mac 3 S.P.A. Dispositif de commande automatique d'une pompe hydraulique
WO2012046162A1 (fr) * 2010-10-08 2012-04-12 Dosatron International Pompe doseuse de liquide, et dispositif detecteur de la variation de pression pour une telle pompe
CN103114985A (zh) * 2013-03-04 2013-05-22 君禾泵业股份有限公司 园林泵的多功能无水保护器
CN105386967A (zh) * 2015-12-12 2016-03-09 李正明 智能一体开关
WO2020232508A1 (fr) * 2019-05-22 2020-11-26 White International Pty Ltd Dispositif de commande de pompe
CN116044731A (zh) * 2023-01-17 2023-05-02 中国长江电力股份有限公司 一种液压系统压油泵控制系统及方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GT200100030A (es) 2001-02-16 2002-03-26 Dispositivo automatico - manual para controlar la salida de agua potable, quimicos, combustibles, bebidas ycualquier fluido; cuyo funcionamiento es completamente mecanico y aplicable a cualquier instalacion.
IT1398617B1 (it) * 2008-12-04 2013-03-08 Raddi Un gruppo regolatore per pilotare una elettropompa di alimentazione di una rete locale di distribuzione di un liquido

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782858A (en) * 1972-10-24 1974-01-01 Red Jacket Mfg Co Control apparatus for a water supply system
FR2586457B1 (fr) * 1985-08-21 1989-06-23 Guinard Pompes Dispositif de commande d'une installation d'alimentation en eau
ES2006279A6 (es) * 1987-12-18 1989-04-16 Banus Garcia Fernando Aparato para el control de la puesta en marcha y paro de una bomba hidraulica.
IT1251968B (it) * 1991-10-21 1995-05-27 Watertech Srl Apparecchiatura per il controllo dell'avviamento e dell'arresto di unapompa di una rete di distribuzione di acqua.
IT1286618B1 (it) * 1996-05-03 1998-07-15 Lapa Services S R L Dispositivo per il comando dell'alimentazione di acqua (od altro liquido) mediante pompa e per la protezione della stessa in caso di

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479911A1 (fr) * 2003-05-23 2004-11-24 Enrico Raddi Petite unité avec chambre d'équilibrage pour un système domestique d'alimentation en eau
WO2005035985A1 (fr) * 2003-10-17 2005-04-21 Mac 3 S.P.A. Dispositif de commande automatique d'une pompe hydraulique
CN103140676B (zh) * 2010-10-08 2016-05-25 多沙特隆国际公司 液体计量泵和用于所述泵的检测压力变化的装置
FR2965864A1 (fr) * 2010-10-08 2012-04-13 Dosatron International Pompe doseuse de liquide, et dispositif detecteur de la variation de pression pour une telle pompe.
CN103140676A (zh) * 2010-10-08 2013-06-05 多沙特隆国际公司 液体计量泵和用于所述泵的检测压力变化的装置
EA022129B1 (ru) * 2010-10-08 2015-11-30 Дозатрон Энтернасьональ Дозирующий жидкостной насос и устройство для определения изменения давления для такого насоса
WO2012046162A1 (fr) * 2010-10-08 2012-04-12 Dosatron International Pompe doseuse de liquide, et dispositif detecteur de la variation de pression pour une telle pompe
US9689765B2 (en) 2010-10-08 2017-06-27 Dosatron International Liquid metering pump, and device for detecting the variation in pressure for such a pump
CN103114985A (zh) * 2013-03-04 2013-05-22 君禾泵业股份有限公司 园林泵的多功能无水保护器
CN103114985B (zh) * 2013-03-04 2015-09-23 君禾泵业股份有限公司 园林泵的多功能无水保护器
CN105386967A (zh) * 2015-12-12 2016-03-09 李正明 智能一体开关
CN105386967B (zh) * 2015-12-12 2017-04-12 李正明 智能一体开关
WO2020232508A1 (fr) * 2019-05-22 2020-11-26 White International Pty Ltd Dispositif de commande de pompe
CN116044731A (zh) * 2023-01-17 2023-05-02 中国长江电力股份有限公司 一种液压系统压油泵控制系统及方法
CN116044731B (zh) * 2023-01-17 2024-03-29 中国长江电力股份有限公司 一种液压系统压油泵控制系统及方法

Also Published As

Publication number Publication date
EP0915256A3 (fr) 2000-05-03
EP0915256B1 (fr) 2004-08-25
PT915256E (pt) 2004-12-31
ES2149667B1 (es) 2001-04-16
ES2149667A1 (es) 2000-11-01
ES2227792T3 (es) 2005-04-01
DE69825839D1 (de) 2004-09-30
DE69825839T2 (de) 2005-09-15

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