EP0426772B1 - Self-reversing reciprocating piston pump with hydraulic transmission of the inversion signal - Google Patents

Self-reversing reciprocating piston pump with hydraulic transmission of the inversion signal Download PDF

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Publication number
EP0426772B1
EP0426772B1 EP19900903379 EP90903379A EP0426772B1 EP 0426772 B1 EP0426772 B1 EP 0426772B1 EP 19900903379 EP19900903379 EP 19900903379 EP 90903379 A EP90903379 A EP 90903379A EP 0426772 B1 EP0426772 B1 EP 0426772B1
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EP
European Patent Office
Prior art keywords
slide valve
self
piston pump
reciprocating piston
valve
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EP19900903379
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German (de)
French (fr)
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EP0426772A1 (en
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André LAVOISIERE
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L25/00—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
    • F01L25/02—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means
    • F01L25/04—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means by working-fluid of machine or engine, e.g. free-piston machine
    • F01L25/06—Arrangements with main and auxiliary valves, at least one of them being fluid-driven
    • F01L25/063—Arrangements with main and auxiliary valves, at least one of them being fluid-driven the auxiliary valve being actuated by the working motor-piston or piston-rod
    • 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
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
    • F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor

Definitions

  • the present invention relates to a piston pump driven in a reciprocating rectilinear movement by a source of hydraulic energy to produce a flow of fluid under a pressure equal to or different from that supplied by the source.
  • the means for automatic reversal of the reciprocating movement call on an auxiliary, electrical or pneumatic energy source, and require appropriate arrangements as well as external connections for picking up, treating, transmit and receive the inversion signal.
  • Figure 1 of FR-A-1,477,987 illustrates a self-reversible reciprocating piston pump with hydraulic transmission of the inversion signal comprising an energy supply leading to a main drawer whose reversal controlled by a pilot drawer allows alternately directing the supply energy from the inlet to one side or the other of a control piston, which acts on controlled pistons in order to suck and discharge a fluid passing through enclosures through suction valves and discharge valves.
  • FR-A-2.244.923 describes and illustrates a reciprocating piston pump in which the control signal is transmitted by mechanical means and the reversing slide is capable of occupying three positions, the neutral position being obtained by spring.
  • the piston pump object of the present invention, offers the advantage of using a hydraulic transmission of the automatic reversing signal, thus making it independent of any other source of energy, allowing a fully integrated and substantially simplified construction.
  • the invention thus creates a self-reversing reciprocating piston pump with hydraulic transmission of the inversion signal comprising an energy supply leading to a main drawer whose reversal controlled by a pilot drawer makes it possible to direct alternately by supply channels, the energy of the arrival towards one side or the other of a control piston, which acts on controlled pistons in order to suck and discharge a fluid passing through enclosures through suction valves and valves delivery, characterized in that it comprises at each end of its travel inside a closed cylinder, at least one pusher pressed alternately by the control piston to transmit the inversion signal to the pilot drawer by the through a liquid column.
  • the liquid columns constituting the connecting element between the pushers and the pilot drawer include non-return valves to ensure their filling, their pressure protection and to prevent premature reversal of the pilot drawer in the event of cavitation.
  • the piston pump, object of the invention further comprises at each end of the pilot drawer at least one channel alternately open or closed by the main drawer to authorize on one side and condemn on the other the exhaust of the liquid columns , in order to prepare the next inversion of the pilot drawer.
  • the channels open or closed by the main drawer include a non-return valve intended to oppose any leaks from the main drawer to avoid premature reversal of the pilot drawer.
  • the extension of the energy supply directed towards the pilot drawer comprises a pressure reducer making it possible to limit the energy intended to move the main drawer.
  • the piston pump of the invention also comprises a control rod integral with the pilot drawer and accessible from the outside to allow the said drawer to be maneuvered and thus facilitate the initiation of the reciprocating movement during the first commissioning.
  • the pushers depressed by the control piston at each limit switch are alternately pushed back in the absence of pressure in the supply channels by springs.
  • the pump of the invention further comprises at least one suction valve intended to fill the enclosure and a discharge valve intended to oppose the return of the energy produced by the controlled pistons.
  • the tightness of the controlled pistons is ensured by seals suitable for the pressure and the fluid admitted into the enclosure.
  • FIG. 1 of the appended drawing represents in section an embodiment in which the control piston (1) integral with the controlled pistons (2,2 ′) is animated by '' a reciprocating rectilinear movement inside a closed cylinder (5) under the action of a hydraulic pressure introduced by the inlet (3) and directed alternately towards the supply channels (4,4 ') by the change of position of the main drawer (15).
  • control piston (1) depresses the pusher (9) which will move the liquid column (10) previously filled through the valve (11) provided for this purpose.
  • the drawer (13) integral with its control rod (21) can move to occupy its reverse position. Position in which the drawer (13) directs energy from the extension of the inlet (3) to the channel (18 ') to move the drawer (15). The other end of the drawer (15) being connected to the exhaust (22) by the channel (18) the drawer (15) can move to occupy its reverse position.
  • passage restriction (19) appearing on the extension of the inlet (3) towards the drawer (13) represents a pressure reducer making it possible to limit the energy intended to move the drawer (15).
  • the drawers (13) and (15) occupy the opposite positions to those shown in the figure, and the source of energy coming from the inlet (3) is directed towards the piston (1) by the channel ( 4).
  • the channel (4 ') being connected to the exhaust (22)
  • the piston (1) can move in the opposite direction, so that the controlled piston (2 ') drives the fluid contained in the enclosure (6') through the discharge valve (7 ') while the enclosure (6) is filled through the suction valve (8).
  • the liquid column (10) In the event that the pressure is established on the pusher (9) before the channel (17) is opened by the drawer (15), the liquid column (10) must force the passage of the calibrated valve (12) provided at l 'effect of limiting the pressure in the liquid column (10) and vice versa in the other direction for the channel (17'), the liquid column (10 ') with the calibrated valve (12').
  • valves (14, 14 ') have the function of opposing the action of possible leaks from the drawer (15) which would be capable of reversing the position of the drawer (13) prematurely.
  • the valves (16,16 ') are also intended to hold the drawer (13) in the position it occupies, in particular in the event of possible cavitation in the liquid columns (10,10').
  • the position of the drawer (13) thus established keeps the drawer (15) in the situation which ensures the continuation of the movement of the piston (1) until it reaches the end of the stroke to depress the pusher (9 '), which will have the effect of reversing the drawer (13) again, then the drawer (15) to reverse the movement of the control piston (1) and so on.
  • the back and forth movements of the piston (1) can only be stopped by cutting the energy at the source or by a sufficient resistant force to oppose the motor force.
  • the indicator rod (21) integral with the drawer (13) and accessible from the outside will allow if necessary manual action on the said drawer to initiate the automatic reciprocating movement.
  • (E, E ') denote the inlet of the fluid and (S) the outlet. (24, 24 ') illustrate assembly screws. Appropriate seals (23, 23 ') seal the controlled pistons (2, 2').
  • inventions of the invention can be used such as two single-acting reciprocating piston pumps juxtaposed to obtain the same result, or even a single single-acting reciprocating piston pump to produce a discontinuous flow.
  • main drawer and the pilot drawer can be used remotely, together or separately, and connected by pipes, without departing from the scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

Pump with a self-reversing piston made to move in a reciprocating rectilinear manner by a source of hydraulic energy including a driving piston which moves with at least one driven piston. Each time it reaches the end of a stroke, the driving piston (1) activates followers (9, 9') in order to move a liquid column (10, 10') which causes a pilot slide valve (13) to be reversed; the latter is designed to reverse the main slide valve (15), which causes the driving piston to move in the other direction, thus ensuring automatic inversion by hydraulic means.

Description

La présente invention concerne une pompe à piston animée d'un mouvement rectiligne alternatif par une source d'énergie hydraulique pour produire un débit de fluide sous une pression égale ou différente de celle fournie par la source.The present invention relates to a piston pump driven in a reciprocating rectilinear movement by a source of hydraulic energy to produce a flow of fluid under a pressure equal to or different from that supplied by the source.

Sur ce type d'appareil de l'art antérieur, les moyens d'inversion automatique du mouvement alternatif font appel à une source d'énergie auxiliaire, électrique ou pneumatique, et nécessitent des dispositions appropriées ainsi que des liaisons extérieures pour capter, traiter, transmettre et réceptionner le signal d'inversion.On this type of apparatus of the prior art, the means for automatic reversal of the reciprocating movement call on an auxiliary, electrical or pneumatic energy source, and require appropriate arrangements as well as external connections for picking up, treating, transmit and receive the inversion signal.

La Figure 1 de FR-A-1.477.987 illustre une pompe à piston alternatif auto-réversible à transmission hydraulique du signal d'inversion comprenant une arrivée d'énergie débouchant sur un tiroir principal dont l'inversion commandée par un tiroir pilote permet de diriger alternativement par des canaux d'alimentation l'énergie de l'arrivée vers un côté ou l'autre d'un piston de commande, lequel agit sur des pistons commandés afin d'aspirer et refouler un fluide transitant par des enceintes au travers des clapets d'aspiration et des clapets de refoulement.Figure 1 of FR-A-1,477,987 illustrates a self-reversible reciprocating piston pump with hydraulic transmission of the inversion signal comprising an energy supply leading to a main drawer whose reversal controlled by a pilot drawer allows alternately directing the supply energy from the inlet to one side or the other of a control piston, which acts on controlled pistons in order to suck and discharge a fluid passing through enclosures through suction valves and discharge valves.

FR-A-2.244.923 décrit et illustre une pompe à piston alternatif dans laquelle le signal de commande est transmis par des moyens mécaniques et le tiroir d'inversion est susceptible d'occuper trois positions, la position neutre étant obtenue par ressort.FR-A-2.244.923 describes and illustrates a reciprocating piston pump in which the control signal is transmitted by mechanical means and the reversing slide is capable of occupying three positions, the neutral position being obtained by spring.

La pompe à piston, objet de la présente invention, offre l'avantage d'utiliser une transmission hydraulique du signal d'inversion automatique, la rendant ainsi indépendante de toute autre source d'énergie, permettant une construction totalement intégrée et sensiblement simplifiée.The piston pump, object of the present invention, offers the advantage of using a hydraulic transmission of the automatic reversing signal, thus making it independent of any other source of energy, allowing a fully integrated and substantially simplified construction.

L'invention crée ainsi une pompe à piston alternatif autoréversible à transmission hydraulique du signal d'inversion comprenant une arrivée d'énergie débouchant sur un tiroir principal dont l'inversion commandée par un tiroir pilote permet de diriger alternativement par des canaux d'alimentation, l'énergie de l'arrivée vers un côté ou l'autre d'un piston de commande, lequel agit sur des pistons commandés afin d'aspirer et de refouler un fluide transitant dans des enceintes au travers des clapets d'aspiration et des clapets de refoulement, caractérisée en ce qu'elle comporte à chaque extrémité de sa course à l'intérieur d'un cylindre fermé, au moins un poussoir enfoncé alternativement par le piston de commande pour transmettre le signal d'inversion au tiroir pilote par l'intermédiaire d'une colonne liquide.The invention thus creates a self-reversing reciprocating piston pump with hydraulic transmission of the inversion signal comprising an energy supply leading to a main drawer whose reversal controlled by a pilot drawer makes it possible to direct alternately by supply channels, the energy of the arrival towards one side or the other of a control piston, which acts on controlled pistons in order to suck and discharge a fluid passing through enclosures through suction valves and valves delivery, characterized in that it comprises at each end of its travel inside a closed cylinder, at least one pusher pressed alternately by the control piston to transmit the inversion signal to the pilot drawer by the through a liquid column.

Selon d'autres caractéristiques de l'invention, les colonnes liquides constituant l'élément de liaison entre les poussoirs et le tiroir pilote comportent des clapets anti-retour pour assurer leur remplissage, leur protection en pression et s'opposer à l'inversion prématurée du tiroir pilote en cas de cavitation.According to other characteristics of the invention, the liquid columns constituting the connecting element between the pushers and the pilot drawer include non-return valves to ensure their filling, their pressure protection and to prevent premature reversal of the pilot drawer in the event of cavitation.

La pompe à piston, objet de l'invention, comporte en outre à chaque extrémité du tiroir pilote au moins un canal alternativement ouvert ou fermé par le tiroir principal pour autoriser d'un côté et condamner de l'autre l'échappement des colonnes liquides, afin de préparer l'inversion suivante du tiroir pilote.The piston pump, object of the invention, further comprises at each end of the pilot drawer at least one channel alternately open or closed by the main drawer to authorize on one side and condemn on the other the exhaust of the liquid columns , in order to prepare the next inversion of the pilot drawer.

Selon la pompe de l'invention, les canaux ouverts ou fermés par le tiroir principal comportent un clapet anti retour destiné à s'opposer aux fuites éventuelles du tiroir principal pour éviter l'inversion prématurée du tiroir pilote.According to the pump of the invention, the channels open or closed by the main drawer include a non-return valve intended to oppose any leaks from the main drawer to avoid premature reversal of the pilot drawer.

Selon une autre caractéristique de l'invention, le prolongement de l'arrivée d'énergie dirigée vers le tiroir pilote comporte un réducteur de pression permettant de limiter l'énergie destinée à déplacer le tiroir principal.According to another characteristic of the invention, the extension of the energy supply directed towards the pilot drawer comprises a pressure reducer making it possible to limit the energy intended to move the main drawer.

La pompe à piston de l'invention comporte par ailleurs une tige témoin solidaire du tiroir pilote et accessible de l'extérieur pour permettre la manoeuvre du dit tiroir et faciliter ainsi l'amorçage du mouvement alternatif lors de la première mise en service.The piston pump of the invention also comprises a control rod integral with the pilot drawer and accessible from the outside to allow the said drawer to be maneuvered and thus facilitate the initiation of the reciprocating movement during the first commissioning.

Egalement, dans la pompe de l'invention, les poussoirs enfoncés par le piston de commande à chaque fin de course sont alternativement repoussés en l'absence de pression dans les canaux d'alimentation par des ressorts.Also, in the pump of the invention, the pushers depressed by the control piston at each limit switch are alternately pushed back in the absence of pressure in the supply channels by springs.

La pompe de l'invention comprend en outre au moins un clapet d'aspiration destiné à assurer le remplissage de l'enceinte et un clapet de refoulement destiné à s'opposer au retour de l'énergie produite par les pistons commandés.The pump of the invention further comprises at least one suction valve intended to fill the enclosure and a discharge valve intended to oppose the return of the energy produced by the controlled pistons.

Dans la pompe de l'invention, l'étanchéité des pistons commandés est assurée par des joints appropriés à la pression et au fluide admis dans l'enceinte.In the pump of the invention, the tightness of the controlled pistons is ensured by seals suitable for the pressure and the fluid admitted into the enclosure.

Divers avantages de l'invention ressortiront de la description ci après et de la figure 1 du dessin annexé qui représente en coupe un mode de réalisation dans lequel le piston de commande (1) solidaire des pistons commandés (2,2') est animée d'un mouvement rectiligne alternatif à l'intérieur d'un cylindre fermé (5) sous l'action d'une pression hydraulique introduite par l'arrivée (3) et dirigée alternativement vers les canaux d'alimentation (4,4') par le changement de position du tiroir principal (15).Various advantages of the invention will emerge from the description below and from FIG. 1 of the appended drawing which represents in section an embodiment in which the control piston (1) integral with the controlled pistons (2,2 ′) is animated by '' a reciprocating rectilinear movement inside a closed cylinder (5) under the action of a hydraulic pressure introduced by the inlet (3) and directed alternately towards the supply channels (4,4 ') by the change of position of the main drawer (15).

Dans la position occupée par le tiroir (15) sur la figure, la pression arrive sur le piston (1) par le canal (4'), le canal (4) étant relié à l'échappement (22), le piston (1) se déplace en poussant le piston (2) lequel chasse le fluide contenu dans l'enceinte (6) au travers du clapet de refoulement (7) pendant que l'enceinte (6') se remplit au travers du clapet d'aspiration (8').In the position occupied by the slide (15) in the figure, the pressure arrives on the piston (1) through the channel (4 '), the channel (4) being connected to the exhaust (22), the piston (1 ) moves by pushing the piston (2) which drives the fluid contained in the enclosure (6) through the discharge valve (7) while the enclosure (6 ') fills through the suction valve ( 8 ').

En présence de pression côté canal (4'), le poussoir (9') est enfoncé, l'excédent de son volume déplacé transite vers l'échappement (22) par le canal (17') lequel est ouvert par le tiroir (15). En l'absence de pression côté canal (4), le poussoir (9) est repoussé par son ressort (20).In the presence of pressure on the channel side (4 '), the pusher (9') is pressed, the excess of its displaced volume transits towards the exhaust (22) via the channel (17 ') which is opened by the drawer (15 ). In the absence of pressure on the channel side (4), the pusher (9) is pushed back by its spring (20).

En fin de course, le piston de commande (1) enfonce le poussoir (9) lequel va déplacer la colonne liquide (10) préalablement remplie au travers du clapet (11) prévu à cet effet.At the end of the stroke, the control piston (1) depresses the pusher (9) which will move the liquid column (10) previously filled through the valve (11) provided for this purpose.

Cette colonne liquide (10) bloquée dans toutes ses issues, notamment par le tiroir (15) spécialement conçu pour fermer le canal (17), va faire pression sur le tiroir pilote (13) lequel se trouve relié à l'échappement (22) à son autre extrémité par le canal (17') judicieusement ouvert par le tiroir (15).This liquid column (10) blocked in all its exits, in particular by the drawer (15) specially designed to close the channel (17), will put pressure on the pilot drawer (13) which is connected to the exhaust (22) at its other end by the channel (17 ') judiciously opened by the drawer (15).

Dans ces conditions, le tiroir (13) solidaire de sa tige témoin (21) peut se déplacer pour occuper sa position inverse. Position dans laquelle le tiroir (13) dirige l'énergie provenant du prolongement de l'arrivée (3) vers le canal (18') pour déplacer le tiroir (15). L'autre extrémité du tiroir (15) étant reliée à l'échappement (22) par le canal (18) le tiroir (15) peut se déplacer pour occuper sa position inverse.Under these conditions, the drawer (13) integral with its control rod (21) can move to occupy its reverse position. Position in which the drawer (13) directs energy from the extension of the inlet (3) to the channel (18 ') to move the drawer (15). The other end of the drawer (15) being connected to the exhaust (22) by the channel (18) the drawer (15) can move to occupy its reverse position.

On notera que la restriction de passage (19) figurant sur le prolongement de l'arrivée (3) vers le tiroir (13) représente un réducteur de pression permettant de limiter l'énergie destinée à déplacer le tiroir (15).It will be noted that the passage restriction (19) appearing on the extension of the inlet (3) towards the drawer (13) represents a pressure reducer making it possible to limit the energy intended to move the drawer (15).

A ce stade, les tiroirs (13) et (15) occupent les positions inverses de celles représentées sur la figure, et la source d'énergie provenant de l'arrivée (3) est dirigée vers le piston (1) par le canal (4). Le canal (4') étant relié à l'échappement (22) Le piston (1) peut se déplacer dans le sens inverse, de telle sorte que le piston commandé (2') chasse le fluide contenu dans l'enceinte (6') au travers du clapet de refoulement (7') pendant que l'enceinte (6) se remplit au travers du clapet d'aspiration (8).At this stage, the drawers (13) and (15) occupy the opposite positions to those shown in the figure, and the source of energy coming from the inlet (3) is directed towards the piston (1) by the channel ( 4). The channel (4 ') being connected to the exhaust (22) The piston (1) can move in the opposite direction, so that the controlled piston (2 ') drives the fluid contained in the enclosure (6') through the discharge valve (7 ') while the enclosure (6) is filled through the suction valve (8).

En l'absence de pression côté canal (4'), le poussoir (9') est repoussé par son ressort (20') et la colonne liquide (10') est réalimentée au travers du clapet (11') prévu à cet effet.In the absence of pressure on the channel side (4 '), the pusher (9') is pushed back by its spring (20 ') and the liquid column (10') is replenished through the valve (11 ') provided for this purpose .

En présence de pression côté canal (4), le poussoir (9) poursuit sa course d'enfoncement, l'excédent de volume déplacé transite vers l'échappement (22) par le canal (17) lequel est alors ouvert par le tiroir (15).In the presence of pressure on the channel side (4), the pusher (9) continues its driving stroke, the excess volume displaced travels towards the exhaust (22) through the channel (17) which is then opened by the drawer ( 15).

Dans l'hypothèse où la pression serait établie sur le poussoir (9) avant que le canal (17) soit ouvert par le tiroir (15), la colonne liquide (10) devra forcer le passage du clapet taré (12) prévu à l'effet de limiter la pression dans la colonne liquide (10) et vice versa dans l'autre sens pour le canal (17'), la colonne liquide (10') avec le clapet taré (12').In the event that the pressure is established on the pusher (9) before the channel (17) is opened by the drawer (15), the liquid column (10) must force the passage of the calibrated valve (12) provided at l 'effect of limiting the pressure in the liquid column (10) and vice versa in the other direction for the channel (17'), the liquid column (10 ') with the calibrated valve (12').

Par ailleurs, les clapets (14, 14') ont pour fonction de s'opposer à l'action des fuites éventuelles du tiroir (15) lesquelles seraient susceptibles d'inverser prématurément la position du tiroir (13). Les clapets (16,16') sont destinés également à maintenir le tiroir (13) dans la position qu'il occupe notamment en cas de cavitation éventuelle dans les colonnes liquides (10,10'). La position du tiroir (13) ainsi établie maintient le tiroir (15) dans la situation qui assure la poursuite du mouvement du piston (1) jusqu'à ce qu'il parvienne en fin de course pour enfoncer le poussoir (9'), ce qui aura pour effet d'inverser à nouveau le tiroir (13), puis le tiroir (15) pour inverser le mouvement du piston de commande (1) et ainsi de suite. Les allers et retours du piston (1) ne pourront être arrêtés que par la coupure de l'énergie à la source ou par un effort résistant suffisant pour s'opposer à l'effort moteur.Furthermore, the valves (14, 14 ') have the function of opposing the action of possible leaks from the drawer (15) which would be capable of reversing the position of the drawer (13) prematurely. The valves (16,16 ') are also intended to hold the drawer (13) in the position it occupies, in particular in the event of possible cavitation in the liquid columns (10,10'). The position of the drawer (13) thus established keeps the drawer (15) in the situation which ensures the continuation of the movement of the piston (1) until it reaches the end of the stroke to depress the pusher (9 '), which will have the effect of reversing the drawer (13) again, then the drawer (15) to reverse the movement of the control piston (1) and so on. The back and forth movements of the piston (1) can only be stopped by cutting the energy at the source or by a sufficient resistant force to oppose the motor force.

Lors du premier démarrage, la tige témoin (21) solidaire du tiroir (13) et accessible de l'extérieur permettra si nécessaire une action manuelle sur le dit tiroir pour amorcer le mouvement alternatif automatique.During the first start, the indicator rod (21) integral with the drawer (13) and accessible from the outside will allow if necessary manual action on the said drawer to initiate the automatic reciprocating movement.

Sur la figure, (E,E') désignent l'entrée du fluide et (S) la sortie. (24, 24') illustrent des vis d'assemblage. Des joints appropriés (23, 23') assurent l'étanchéité des pistons commandés (2, 2').In the figure, (E, E ') denote the inlet of the fluid and (S) the outlet. (24, 24 ') illustrate assembly screws. Appropriate seals (23, 23 ') seal the controlled pistons (2, 2').

D'autres modes de réalisation de l'invention peuvent être utilisés tel que deux pompes à piston alternatif simple effet juxtaposées pour obtenir le même résultat, ou encore une seule pompe à piston alternatif simple effet pour produire un débit discontinu. D'autre part, le tiroir principal et le tiroir pilote peuvent être utilisés à distance, ensemble ou séparemment, et reliés par des tuyauteries, sans sortir du cadre de l'invention.Other embodiments of the invention can be used such as two single-acting reciprocating piston pumps juxtaposed to obtain the same result, or even a single single-acting reciprocating piston pump to produce a discontinuous flow. On the other hand, the main drawer and the pilot drawer can be used remotely, together or separately, and connected by pipes, without departing from the scope of the invention.

Claims (8)

  1. Self-reversing reciprocating piston pump with hydraulic transmission of the inversion signal (25) comprising an energy inlet (3) leading into a main slide valve (15) whose inversion, commanded by a control slide valve (13), allows the energy from the inlet (3) to be alternately directed to one side or the other of a drive piston (1) via supply channels (4, 4'), said drive piston (1) acting on the driven pistons (2, 2') in order to suck in and discharge a fluid transiting via enclosures (6, 6') through suction valves (8, 8') and discharge valves (7, 7'), characterized in that it comprises at each extremity of its distance of travel inside a closed cylinder (5) at least one push rod (9, 9'), alternately driven in by the piston (1) to transmit the inversion signal to the control valve (13) by the intermediary of a liquid column (10, 10'), and comprising at each extremity of the slide valve (13) at least one channel (17, 17') which is alternately opened or closed by the slide valve (15) to permit the escape of liquid columns (10, 10') on one side and prevent it on the other in order to prepare the following inversion of the slide valve (13).
  2. Self-reversing reciprocating piston pump according to claim 1, characterized in that the liquid columns (10, 10') constitute the connection element between the push rods (9, 9') and the slide valve (13), and in that said liquid columns comprise non-return valves (11, 11') to ensure their filling, non-return valves (12, 12') to limit their pressure, and non-return valves (16, 16') to oppose the premature inversion of the slide valve (13) in the event of cavitation.
  3. Self-reversing reciprocating piston pump according to either one of claims 1 and 2, characterized in that the channels (17, 17') comprise a non-return valve (14, 14') intended to oppose any possible leaks from the slide valve (15) to avoid premature inversion of the slide valve (13).
  4. Self-reversing reciprocating piston pump according to any one of claims 1 to 3, characterized in that the prolongation of the inlet (3) directed towards the slide valve (13) comprises a pressure reducer (19) making it possible to limit the energy intended to displace the slide valve (15).
  5. Self-reversing reciprocating piston pump according to any one of claims 1 to 4, characterized in that it comprises an indicator rod (21) integral with the slide valve (13) to allow it to be moved from the exterior in order to prime the alternating movement when it is first started up.
  6. Self-reversing reciprocating piston pump according to any one of claims 1 to 5, characterized in that the push rods (9, 9') are alternately pushed back by springs (20, 20') in the absence of pressure in channels (4, 4').
  7. Self-reversing reciprocating piston pump according to any one of claims 1 to 6, characterized in that it also comprises at least one suction valve (8, 8') intended to ensure the filling of enclosures (6, 6') and a discharge valve (7, 7') intended to oppose the return of the energy produced by the pistons (2, 2').
  8. Self-reversing reciprocating piston pump according to any one of claims 1 to 7, characterized in that the sealing of the driven pistons (2, 2') is ensured by seals (23, 23') adapted to the pressure and to the fluid admitted into the enclosures (6, 6').
EP19900903379 1989-02-06 1990-02-05 Self-reversing reciprocating piston pump with hydraulic transmission of the inversion signal Expired - Lifetime EP0426772B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90903379T ATE97465T1 (en) 1989-02-06 1990-02-05 SELF-RETURNING PISTON PUMP WITH HYDRAULIC REVERSE SIGNAL TRANSMISSION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8901493A FR2642796B1 (en) 1989-02-06 1989-02-06 SELF-REVERSIBLE RECIPROCATING PISTON PUMP WITH HYDRAULIC REVERSE SIGNAL TRANSMISSION
FR8901493 1989-02-06

Publications (2)

Publication Number Publication Date
EP0426772A1 EP0426772A1 (en) 1991-05-15
EP0426772B1 true EP0426772B1 (en) 1993-11-18

Family

ID=9378505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900903379 Expired - Lifetime EP0426772B1 (en) 1989-02-06 1990-02-05 Self-reversing reciprocating piston pump with hydraulic transmission of the inversion signal

Country Status (6)

Country Link
EP (1) EP0426772B1 (en)
AU (1) AU5158490A (en)
CA (1) CA2026986A1 (en)
DE (1) DE69004667T2 (en)
FR (1) FR2642796B1 (en)
WO (1) WO1990008896A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2346178B (en) * 1999-01-26 2003-03-19 Brian William Young Integral pump and control valve
CN102410167A (en) * 2011-11-17 2012-04-11 李镇明 Driving lever type reversing mechanism of hydraumatic grouting pump
RU181046U1 (en) * 2017-07-11 2018-07-04 Сергей Петрович Семенищев Hydraulic compressor
CN111120240A (en) * 2019-12-25 2020-05-08 邵延荣 Submersible pump

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970579A (en) * 1959-11-23 1961-02-07 Tomlon Corp Hydraulic reversing control
US3292498A (en) * 1965-01-08 1966-12-20 Raymond S Zimmerman Fluid motor including reciprocating fluid responsive valves
DE1528583A1 (en) * 1965-05-20 1970-01-29 Stahl U Appbau Hans Leffer Gmb Hydraulically or pneumatically continuously operated piston drive with reciprocating movement, especially double-acting pressure intensifier
CH473319A (en) * 1968-06-19 1969-05-31 Hydrel Ag Maschf Fully hydraulic device on the machine or apparatus with a straight back and forth moving part, for largely load and speed independent reversal of the accuracy of the movement of the part between two adjustable reversing points
US3846049A (en) * 1973-09-24 1974-11-05 Oilgear Co Intensifier pump with half wave modulator
US4029440A (en) * 1975-08-21 1977-06-14 Flow Industries, Inc. High pressure fluid intensifier and method
US4730991A (en) * 1986-07-29 1988-03-15 James M. Greentree Gas actuated proportioning pump

Also Published As

Publication number Publication date
FR2642796B1 (en) 1994-05-06
WO1990008896A1 (en) 1990-08-09
AU5158490A (en) 1990-08-24
DE69004667D1 (en) 1993-12-23
EP0426772A1 (en) 1991-05-15
FR2642796A1 (en) 1990-08-10
DE69004667T2 (en) 1994-05-19
CA2026986A1 (en) 1990-08-07

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