EP0899457A1 - Hydraulic control valve mechanism for progressive start-up of a submersible water pump - Google Patents

Hydraulic control valve mechanism for progressive start-up of a submersible water pump Download PDF

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Publication number
EP0899457A1
EP0899457A1 EP98440176A EP98440176A EP0899457A1 EP 0899457 A1 EP0899457 A1 EP 0899457A1 EP 98440176 A EP98440176 A EP 98440176A EP 98440176 A EP98440176 A EP 98440176A EP 0899457 A1 EP0899457 A1 EP 0899457A1
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EP
European Patent Office
Prior art keywords
cylinder
piston
disposed
return
water
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Application number
EP98440176A
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German (de)
French (fr)
Inventor
Jean-Paul Hettler
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Individual
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Individual
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Publication of EP0899457A1 publication Critical patent/EP0899457A1/en
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    • 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
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • 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
    • F04B2205/08—Pressure difference over a throttle

Definitions

  • the present invention relates to a hydraulic device for regulating the flow driven back when starting a pump (start-up according to a predetermined time).
  • Discharged water may contain sand; which damages the equipment and the downstream consumer.
  • the invention relates to a new device for exclusively hydraulic design and operation. It completes the range of existing systems and in addition has the great advantage of being able to be used for places not supplied with electric current.
  • the device according to the invention comprises inside a cylindrical body forming envelope and along the vertical axis, a "piston-cylinder" assembly capped with a tranquilization with which it is connected by two small pipes: one has one needle valve (upflow) the other a non-return valve (downflow).
  • one needle valve upflow
  • the other a non-return valve downflow
  • the piston rise time (allowing passage of the pumped flow according to a progression) is adjusted by the needle valve.
  • the piston descends and resumes its place in its seat thanks to the return of water through piping fitted with the non-return valve.
  • Figure 1 shows in section the device of the invention.
  • a cylindrical body (1) forms the outer envelope of the system. It includes the base a conical part (2) followed by a throttle (3) and flares in the part central (4).
  • the water flow passes through the device from bottom to top (the diameter of the orifice inlet (13) is the same as that of the outlet at the top of the device).
  • a cylindrical assembly (5) consisting of three elements: a cylinder (6) in which can move a piston (7) which rests in (8) on the throttle (3) of the body (1).
  • the needle valve (17) which regulates the value of the evacuation flow rate and consequently the speed and the ascent time of the piston (7).
  • the piston (7) When the pump stops, the piston (7) must return to its initial position (rest on the seat (8)). This function is ensured by its own weight and a return of water which leaves from the still chamber in (19) to circulate in the piping (20) and end in the chamber (6) in (22) (above the upper position of the piston).
  • the pipe (20) is moreover supplemented by a non-return valve (21) which forces the water during the ascent of the piston (7) to pass necessarily through the needle valve (17).
  • control of the time taken by the piston to pass from the lower position at the upper location allows to gradually pass the delivery flow crossing the device from zero to nominal flow over a period of time pre-selected.

Abstract

The regulator is situated after a bore hole pump and comprises a cylindrical housing (1) with a constriction (3), followed by a section (4) of larger diameter. A piston (7) which interacts with the constriction slides in a cylinder (6) situated axially inside the cylindrical body, the cylinder being capped by a damping chamber (9) which is separated from it by a partition (12), while a hydraulic connection links the top of the cylinder and the upper part of the damping chamber. The hydraulic connection has flow (16) and return pipes, a non-return valve (21) and a control cock (17).

Description

La présente invention concerne un dispositif hydraulique pour réguler le débit refoulé lors du démarrage d'une pompe (mise en régime selon un temps prédéterminé).The present invention relates to a hydraulic device for regulating the flow driven back when starting a pump (start-up according to a predetermined time).

A l'heure actuelle l'extraction de l'eau de nappes se fait en général par des puits verticaux équipés de pompes immergées. Celles-ci sont munies de moteurs à démarrage direct. En quelques secondes le débit d'exhaure passe de zéro à la "valeur nominale".At present the extraction of groundwater is generally done by wells vertical equipped with submersible pumps. These are fitted with starting motors direct. In a few seconds the dewatering rate goes from zero to "nominal value".

Certains forages placés dans des nappes constituées de couches à sables fins, ne supportent pas des conditions de démarrage rapides. L'eau refoulée risque de contenir du sable ; ce qui porte préjudice au matériel et au consommateur en aval.Certain boreholes placed in sheets made up of layers of fine sand, do not support fast start conditions. Discharged water may contain sand; which damages the equipment and the downstream consumer.

Pour pallier ces inconvénients et obtenir une mise en régime beaucoup plus étalée dans le temps (quelques minutes au lieu de quelques secondes) les exploitants de forages ont recours à différents dispositifs :

  • action sur les conditions de démarrage du moteur électrique (par exemple moteurs en liaison avec un variateur de fréquence ou d'intensité),
  • ouverture progressive d'une vanne placée sur la conduite de refoulement (par exemple vanne-papillon motorisée avec automate).
To overcome these drawbacks and obtain a warm-up that is much more spread out over time (a few minutes instead of a few seconds), drilling operators use different devices:
  • action on the starting conditions of the electric motor (for example motors in connection with a frequency or current controller),
  • progressive opening of a valve placed on the discharge line (for example motorized butterfly valve with automaton).

Contrairement aux appareils existants, l'invention porte sur un nouvel appareil de conception et de fonctionnement exclusivement hydraulique. Il complète la gamme des systèmes existants et de plus présente le grand avantage de pouvoir être utilisé à des endroits non alimentés par du courant électrique.Unlike existing devices, the invention relates to a new device for exclusively hydraulic design and operation. It completes the range of existing systems and in addition has the great advantage of being able to be used for places not supplied with electric current.

Le dispositif selon l'invention comporte à l'intérieur d'un corps cylindrique formant enveloppe et selon l'axe vertical, un ensemble "piston-cylindre" coiffé d'une chambre de tranquillisation avec laquelle il est en liaison par deux petites tuyauteries : l'une comporte un robinet à pointeau (flux ascendant) l'autre un clapet de non-retour (flux descendant). Lors du démarrage de la pompe, la force de l'eau refoulée tend à pousser le piston vers le haut. La durée d'ascension du piston (permettant le passage du débit pompé selon une progression) est réglée par le robinet à pointeau. Lors de l'arrêt de la pompe, le piston redescend et reprend sa place sur son siège grâce au retour de l'eau par l'intermédiaire de la tuyauterie munie du clapet anti-retour.The device according to the invention comprises inside a cylindrical body forming envelope and along the vertical axis, a "piston-cylinder" assembly capped with a tranquilization with which it is connected by two small pipes: one has one needle valve (upflow) the other a non-return valve (downflow). When starting the pump, the force of the pumped water tends to push the piston towards the high. The piston rise time (allowing passage of the pumped flow according to a progression) is adjusted by the needle valve. When the pump stops, the piston descends and resumes its place in its seat thanks to the return of water through piping fitted with the non-return valve.

L'invention pourra de toute façon être bien comprise à l'aide du complément de description qui suit ainsi que du dessin ci-annexé, lesquels complément et dessin sont relatifs à un mode de réalisation préféré de l'invention et ne comportent, bien entendu, aucun caractère limitatif.The invention can in any case be well understood with the help of description which follows as well as of the attached drawing, which complement and drawing are relating to a preferred embodiment of the invention and do not, although heard, no limiting character.

La figure 1 représente en coupe le dispositif de l'invention.Figure 1 shows in section the device of the invention.

Un corps cylindrique (1) forme l'enveloppe extérieure du système. Il comporte à la base une partie conique (2) suivie d'un étranglement (3) et s'évase dans la partie centrale (4). Le flux de l'eau passe dans l'appareil de bas en haut (le diamètre de l'orifice d'entrée (13) est le même que celui de l'orifice de sortie en haut de l'appareil). A cylindrical body (1) forms the outer envelope of the system. It includes the base a conical part (2) followed by a throttle (3) and flares in the part central (4). The water flow passes through the device from bottom to top (the diameter of the orifice inlet (13) is the same as that of the outlet at the top of the device).

A l'intérieur du corps (1) est disposé coaxialement un ensemble cylindrique (5) constitué de trois éléments : un cylindre (6) dans lequel peut se déplacer un piston (7) qui repose en (8) sur l'étranglement (3) du corps (1).Inside the body (1) is arranged coaxially a cylindrical assembly (5) consisting of three elements: a cylinder (6) in which can move a piston (7) which rests in (8) on the throttle (3) of the body (1).

Ces deux éléments sont complétés par une chambre de tranquillisation (9) surmontée d'un partie conique (10). A la base cette chambre est percée de 4 orifices circulaires (11) qui alimentent le retour d'eau en (19). Le cylindre (6) est séparé de la chambre (9) par la paroi (12). Lors du démarrage de la pompe (mise en route de l'appareil) le flux ascendant qui entre par l'ouverture (13) tend à dégager le piston (7) du siège (8) pour le pousser vers le haut. L'étanchéité entre le piston (7) et le cylindre (6) est assurée par 3 joints à segments (14). Lors de son ascension le piston (7) comprime l'eau à l'intérieur du cylindre (6). Elle s'échappe en (15) dans une tuyauterie (16) équipée d'un robinet à pointeau (17) et aboutit en (18) dans la chambre de tranquillisation (9). Elle s'évacue par le 4 orifices circulaires (11).These two elements are completed by a stilling chamber (9) surmounted by a conical part (10). At the base this chamber is pierced with 4 orifices circular (11) which feed the water return at (19). The cylinder (6) is separated from the chamber (9) through the wall (12). When starting the pump (starting up the device) the upward flow which enters through the opening (13) tends to release the piston (7) from the seat (8) to push it up. The seal between the piston (7) and the cylinder (6) is provided by 3 segment joints (14). During its ascent the piston (7) compresses the water to inside the cylinder (6). It escapes at (15) into a pipe (16) fitted with a needle valve (17) and ends at (18) in the plenum (9). She is evacuated through the 4 circular orifices (11).

C'est le robinet à pointeau (17) qui règle la valeur du débit d'évacuation et en conséquence la vitesse et le temps de remontée du piston (7). Lors de l'arrêt de la pompe, il faut que le piston (7) revienne dans sa position initiale (repos sur le siège (8)). Cette fonction est assurée par son poids propre et un retour d'eau qui part de la chambre de tranquillisation en (19) pour circuler dans la tuyauterie (20) et aboutir dans la chambre (6) en (22) (au-dessus de la position supérieure du piston). La conduite (20) est d'ailleurs complétée d'un clapet anti-retour (21) qui oblige l'eau lors de l'ascension du piston (7) à passer obligatoirement par le robinet à pointeau de réglage (17).It is the needle valve (17) which regulates the value of the evacuation flow rate and consequently the speed and the ascent time of the piston (7). When the pump stops, the piston (7) must return to its initial position (rest on the seat (8)). This function is ensured by its own weight and a return of water which leaves from the still chamber in (19) to circulate in the piping (20) and end in the chamber (6) in (22) (above the upper position of the piston). The pipe (20) is moreover supplemented by a non-return valve (21) which forces the water during the ascent of the piston (7) to pass necessarily through the needle valve (17).

En résumé, la maítrise du temps mis par le piston à passer de la position inférieure à l'emplacement supérieur (grâce au réglage adéquat du débit d'évacuation passant par le robinet à pointeau) permet de faire passer progressivement le débit de refoulement traversant l'appareil de la valeur zéro au débit nominal selon un laps de temps présélectionné.In summary, the control of the time taken by the piston to pass from the lower position at the upper location (thanks to the adequate adjustment of the passing discharge rate through the needle valve) allows to gradually pass the delivery flow crossing the device from zero to nominal flow over a period of time pre-selected.

Claims (5)

Dispositif destiné à équiper une conduite de refoulement verticale et disposé en aval d'une pompe en vue de réguler le débit refoulé par celle-ci en phase de démarrage caractérisé en ce qu'il comporte un corps cylindrique (1) muni d'un étranglement (3) suivi d'une partie médiane évasée (4), sur ledit étranglement prend appui un piston (7) glissant dans un cylindre (6) disposé axialement dans ledit corps cylindrique (1), le cylindre (6) étant coiffé par une chambre de tranquillisation (9) dont il est séparé par une paroi (12), une liaison hydraulique reliant le sommet du cylindre (6) à la partie supérieure de la chambre de tranquillisation.Device intended to equip a vertical discharge pipe and arranged downstream of a pump in order to regulate the flow discharged by it during the start characterized in that it comprises a cylindrical body (1) provided with a constriction (3) followed by a flared middle part (4), on said constriction takes support a piston (7) sliding in a cylinder (6) disposed axially in said body cylindrical (1), the cylinder (6) being capped by a plenum (9) which is separated by a wall (12), a hydraulic connection connecting the top of the cylinder (6) to the upper part of the plenum. Dispositif selon la revendication 1 caractérisé en ce que la liaison hydraulique est constituée d'une part par une tuyauterie "aller" (16) partant d'un orifice (15) disposé au sommet du cylindre (6) et débouchant à un orifice (18) disposé à la partie supérieure de la chambre de tranquillisation (9) et d'autre part par une tuyauterie (20) dont le départ (19) est situé à la partie supérieure de la chambre de tranquillisation (9) et l'arrivée (22) au sommet du cylindre. (6).Device according to claim 1 characterized in that the hydraulic connection consists on the one hand by a pipe "go" (16) from an orifice (15) disposed at top of the cylinder (6) and opening to an orifice (18) disposed at the upper part of the stilling chamber (9) and on the other hand by a pipe (20) whose departure (19) is located at the top of the plenum (9) and the inlet (22) at top of the cylinder. (6). Dispositif selon la revendication 2 caractérisé en ce qu'un robinet à pointeau (17) est disposé sur la tuyauterie (16) du trajet "aller" permettant le réglage du débit d'évacuation dans ledit conduit et par conséquent le temps de remontée du piston (7) jusqu'à l'établissement du débit nominal refoulé par la pompe à travers l'appareil lorsque le piston (7) a atteint sa position haute.Device according to claim 2 characterized in that a needle valve (17) is disposed on the piping (16) of the "outward" path allowing the adjustment of the flow rate evacuation in said conduit and therefore the time for the piston to rise (7) until the nominal flow rate delivered by the pump through the device is established when the piston (7) has reached its high position. Dispositif selon la revendication 2 caractérisé en ce que la tuyauterie du trajet "retour" est pourvue d'un clapet anti-retour (21) s'opposant à la montée de l'eau par cette voie forçant ainsi le passage de l'eau à travers le robinet à pointeau (17) tout en permettant la descente de l'eau à partir de la chambre de tranquillisation (en 19) vers l'arrivée (22) au sommet du cylindre assurant le retour assez rapide du piston (7) vers sa position basse en appui sur l'étranglement.Device according to claim 2 characterized in that the path piping "return" is provided with a non-return valve (21) opposing the rise of water by this track thus forcing the passage of water through the needle valve (17) while allowing the descent of the water from the stilling chamber (in 19) to the arrival (22) at the top of the cylinder ensuring the fairly rapid return of the piston (7) to its low position resting on the throttle. Dispositif selon les revendications 1 à 4 prises dans leur ensemble caractérisé en ce que la chambre de tranquillisation (9) est pourvue à sa base de 4 orifices circulaires (11) permettant la communication hydraulique de cette chambre avec l'espace annulaire compris entre le corps (1) et l'ensemble cylindrique coaxial (5).Device according to claims 1 to 4 taken as a whole, characterized in that the stilling chamber (9) is provided at its base with 4 circular orifices (11) allowing the hydraulic communication of this chamber with the space annular between the body (1) and the coaxial cylindrical assembly (5).
EP98440176A 1997-08-28 1998-08-14 Hydraulic control valve mechanism for progressive start-up of a submersible water pump Withdrawn EP0899457A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9710873 1997-08-28
FR9710873A FR2767894A1 (en) 1997-08-28 1997-08-28 PROGRESSIVE FLOW HYDRAULIC REGULATOR

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EP0899457A1 true EP0899457A1 (en) 1999-03-03

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EP98440176A Withdrawn EP0899457A1 (en) 1997-08-28 1998-08-14 Hydraulic control valve mechanism for progressive start-up of a submersible water pump

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FR (1) FR2767894A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2261431A1 (en) * 1974-02-14 1975-09-12 Petit Et Co Sarl A
US4370102A (en) * 1980-01-31 1983-01-25 Nissan Motor Company, Limited Fluid pumping device
US5009576A (en) * 1990-01-08 1991-04-23 Ingersoll-Rand Company Compressor unloader controller
US5570999A (en) * 1994-03-31 1996-11-05 Daewoo Electronics Co., Ltd. Electromagnetic pump having an automatic exhaust-control valve
EP0824193A2 (en) * 1996-04-23 1998-02-18 Osvaldo Valdes Hydraulic actuator for pressure switch of fluidic system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2261431A1 (en) * 1974-02-14 1975-09-12 Petit Et Co Sarl A
US4370102A (en) * 1980-01-31 1983-01-25 Nissan Motor Company, Limited Fluid pumping device
US5009576A (en) * 1990-01-08 1991-04-23 Ingersoll-Rand Company Compressor unloader controller
US5570999A (en) * 1994-03-31 1996-11-05 Daewoo Electronics Co., Ltd. Electromagnetic pump having an automatic exhaust-control valve
EP0824193A2 (en) * 1996-04-23 1998-02-18 Osvaldo Valdes Hydraulic actuator for pressure switch of fluidic system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHAIZE J: "VALVE SELECTION CRITICAL TO PUMP LIFE AND PERFORMANCE", WORLD PUMPS, no. 10, 1 October 1989 (1989-10-01), pages 356 - 358, XP000115206 *

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