EP0426772A1 - 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.

Info

Publication number
EP0426772A1
EP0426772A1 EP19900903379 EP90903379A EP0426772A1 EP 0426772 A1 EP0426772 A1 EP 0426772A1 EP 19900903379 EP19900903379 EP 19900903379 EP 90903379 A EP90903379 A EP 90903379A EP 0426772 A1 EP0426772 A1 EP 0426772A1
Authority
EP
European Patent Office
Prior art keywords
drawer
piston pump
reciprocating piston
pump according
pressure
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
EP19900903379
Other languages
German (de)
French (fr)
Other versions
EP0426772B1 (en
Inventor
Andre Lavoisiere
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT90903379T priority Critical patent/ATE97465T1/en
Publication of EP0426772A1 publication Critical patent/EP0426772A1/en
Application granted granted Critical
Publication of EP0426772B1 publication Critical patent/EP0426772B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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 by 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 of automatic inversion of the reciprocating movement call upon an auxiliary power source, electric or pneumatic, and thus require appropriate arrangements. e external connections to receive, process, transmit and. receive the inversion signal.
  • 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 construction to be carried out completely. integrated and significantly simplified.
  • the invention thus creates an autoré ⁇ versible 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 channels supply, the 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, characteristic in that it comprises at each end of its travel inside a closed cylinder, at least one push button depressed alternatively by the control piston to transmit the inversion signal to the pilot drawer via 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 oppose the premature reversal of the pilot drawer in case of cavitation.
  • the piston pump object of the invention, further comprises at each end of the pilot drawer at least one channel alter ⁇ natively open or closed by the main drawer to au ⁇ toriser on one side and condemn on the other 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 des ⁇ tined 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 has 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.
  • 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) secured to its té ⁇ less rod (21) can move to occupy its reverse position.
  • 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.
  • 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).
  • 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 ( ⁇ ) is filled through the suction valve (8).
  • the liquid column (10) must force the passage of the calibrated valve (12) provided for the purpose of limiting the pressure in the liquid column
  • valves (14, 14 ') have the function of opposing the action of possible leaks from the drawer (15) which would be liable to prematurely reverse the position of the drawer (13).
  • the valves (16,16 ') are also intended to main ⁇ hold the drawer (13) in the position it occupies in particular in case 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.
  • 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.

Abstract

Pompe à piston auto réversible animée d'un mouvement rectiligne alternatif par une source d'énergie hydraulique comprenant un piston de commande solidaire d'au moins un piston commandé caractérisé en ce que le piston de commande (1) agit à chaque fin de course sur des poussoirs (9, 9') pour déplacer une colonne liquide (10, 10') laquelle provoque l'inversion d'un tiroir pilote (13) lui même destiné à inverser le tiroir principal (15) pour obtenir le changement du sens de déplacement du piston de commande, assurant ainsi l'inversion automatique par transmission hydraulique.Self-reversible piston pump driven in an alternating rectilinear movement by a hydraulic power source comprising a control piston integral with at least one controlled piston characterized in that the control piston (1) acts at each limit switch on pushers (9, 9 ') to move a liquid column (10, 10') which causes the inversion of a pilot drawer (13) itself intended to invert the main drawer (15) to obtain the change of the direction of displacement of the control piston, thus ensuring automatic reversal by hydraulic transmission.

Description

A AT
POMPE A PISTON ALTERNATIF AUTOREVERSIBLE A TRANSMISSION HYDRAULIQUE DU SIGNAL D'INVERSIONSELF-REVERSIBLE RECIPROCATING PISTON PUMP WITH HYDRAULIC REVERSE SIGNAL TRANSMISSION
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. Sur ce type d'appareil de l'art antérieur les moyens d'inver¬ sion automatique du mouvement alternatif font appel a une source d'énergie auxiliaire, électrique ou pneumatique, et nécessitent des dispositions appropriées ainsi .; e des liaisons extérieures pour capter, traiter, transmettre et. réceptionner le signal d'inversion.The present invention relates to a piston pump driven by 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. On this type of apparatus of the prior art, the means of automatic inversion of the reciprocating movement call upon an auxiliary power source, electric or pneumatic, and thus require appropriate arrangements. e external connections to receive, process, transmit and. receive the inversion signal.
La pompe à piston, objet de la présente invention, offre l'a¬ vantage d'utiliser une transmission hydraulique du signal d'inversion automatique, la rendant ainsi indépendante de tou¬ te autre source d'énergie, permettant une construction totale- ment 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 construction to be carried out completely. integrated and significantly simplified.
L'invention crée ainsi une pompe à piston alternatif autoré¬ versible à transmission hydraulique du signal d'inversion comprenant une arrivée d'énergie débouchant sur un tiroir prin¬ cipal dont l'inversion commandée par un tiroir pilote permet de diriger alternativement par des canaux d'alimentation, l'énergi 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, caractériic en ce qu'elle comporte a chaque extrémité de sa course à l'in¬ térieur d'un cyclindre fermé, au moins un poussoir enfoncé al¬ ternativement par le piston de commande pour transmettre le signal d'inversion au tiroir pilote par l'intermédiaire d'une colonne liquide. 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. lThe invention thus creates an autoré¬ versible 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 channels supply, the 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, characteristic in that it comprises at each end of its travel inside a closed cylinder, at least one push button depressed alternatively by the control piston to transmit the inversion signal to the pilot drawer via a liquid column. 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 oppose the premature reversal of the pilot drawer in case of cavitation. l
La pompe à piston, objet de l'invention, comporte en outre à chaque extrémité du tiroir pilote au moins un canal alter¬ nativement ouvert ou fermé par le tiroir principal pour au¬ toriser 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 alter¬ natively open or closed by the main drawer to au¬ toriser on one side and condemn on the other 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 des¬ tiné 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 des¬ tined to oppose any leaks from the main drawer to avoid premature reversal of the pilot drawer.
Selon une autre caractéristique de l'invention, le prolonge¬ ment de l'arrivée d'énergie dirigée vers le tiroir pilote com¬ porte un réducteur de pression permettant de limiter l'énergie destinée à déplacer le tiroir principal. La pompe à piston de l'invention comporte par ailleurs une tige témoin solidaire dti tiroir pilote et accessible de l'extérieur pour permettre la manoeuvre du dit tiroir et faciliter ainsi l'amorçage du mouvement alternatif lors de là première mise en service. Egalement, dans la pompe de l'invention, les poussoirs enfoncés par le piston de commande à chaque fin de course sont alternati¬ vement repoussés en l'absence de pression dans les canaux d'ali¬ mentation par des ressorts. 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'é¬ nergie produite par les pistons commandés.According to another characteristic of the invention, the extension of the energy supply directed towards the pilot drawer has 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. 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. 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 mou- vement rectiligne alternatif à l'intérieur d'un cylindre ferme (5) sous l'action d'une pression hydraulique introduite par l'arrivée (5) et dirigée alternativement vers les canaux d'ali¬ mentation [4,4') par le changement de position du tiroir prin¬ cipal (15) . bans 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 refoule¬ ment (7) pendant que l'enceinte (6') se remplit au travers du clapet d'aspiration (8').Various advantages of the invention will emerge from the description below and from Figure 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 'an alternating rectilinear movement inside a closed cylinder (5) under the action of a hydraulic pressure introduced by the inlet (5) and directed alternately towards the supply channels [4, 4 ') by changing the position of the main drawer (15). 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 valve suction (8 ').
_in présence de pression côté canal (4'), le poussoir (9') est enfoncé, l'excédent de son volume déplac 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 depressed, 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 té¬ moin (21) peut se déplacer pour occuper sa position inverse. Position dans laquelle le tiroir (13) dirige l'énergie prove¬ nant 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. 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 desti¬ née à déplacer le tiroir (15).Under these conditions, the drawer (13) secured to its té¬ less 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. 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 in¬ verses de celles représentées sur la figure, et la source d'é¬ nergie provenant de l'arrivée (5) est dirigée vers le piston (1) par le canal (4). Le canal (4') étant relié à l'échappement (22) kAt this stage, the drawers (13) and (15) occupy the opposite positions from those shown in the figure, and the source of energy from the inlet (5) is directed towards the piston (1). through the channel (4). The channel (4 ') being connected to the exhaust (22) k
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 (ό) se remplit au travers du clapet d'aspiration (8).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 (ό) 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. En présence de pression côté canal (4) , le poussoir (9) pour- suit 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 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 . 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 poussoirIn the event that the pressure is established on the pusher
(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(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 for the purpose of limiting the pressure in the liquid column
(10) et vice versa dans l'autre sens pour le canal (17'), la colonne liquide (10') avec le clapet taré (12') .(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'oppo- ser 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 main¬ tenir 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 ti¬ roir (13), puis le tiroir (15) pour inverser le mouvement du pis- ton de commande (1) et ainsi de suite. Les allers et retours du piston (1) ne pourront être arrêtés que par la coupure de l'éner¬ gie à la source ou par un effort résistant suffisant pour s'oppo¬ ser à l'effort moteur. Lors du premier démarrage, la tige témoin (21) solidaire du ti- roir (15) et accessible de l'extérieur permettra si nécessaire une action manuelle sur le dit tiroir pour amorcer le mouvement alternatif automatique. Sur la firrure, (E,E') désignent l'entrée du fluide et (S) la sortie. (24, 24') illustrent des vis d'assemblage. Des joints appropriés (25, 23') assurent l'étanchéité des pistons com¬ mandés (2, 2') . D'autres modes de réalisation de l'invention peuvent être uti¬ lisés 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 séparem- ment, et reliés par des tuyauteries, sans sortir du cadre de 1 ' invention. Furthermore, the valves (14, 14 ') have the function of opposing the action of possible leaks from the drawer (15) which would be liable to prematurely reverse the position of the drawer (13). The valves (16,16 ') are also intended to main¬ hold the drawer (13) in the position it occupies in particular in case 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. During the first start-up, the control rod (21) integral with the drawer (15) and accessible from the outside will allow manual action if necessary on said drawer to initiate the automatic reciprocating movement. On the firrure, (E, E ') denote the inlet of the fluid and (S) the outlet. (24, 24 ') illustrate assembly screws. Appropriate seals (25, 23 ') ensure the tightness of the controlled pistons (2, 2'). 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

REVENDI bCATIONSREVENDI bCATIONS
1) Pompe à piston alternatif auto réversible à transmission hydraulique du signal d'inversion (25) comprenant une arrivée d'énergie (3) débouchant sur un tiroir principal (15) dont l'inversion commandée par un tiroir pilote (13) permet de di¬ riger alternativement par des canaux d'alimentation (4, 4') l'énergie de l'arrivée (3) vers un côté ou l'autre d'un pis¬ ton de commande (1) lequel agit sur des pistons commandés (2,2') afin d'aspirer et de refouler un fluide transitant par des enceintes (6,6') au travers des clapets d'aspiration (8,8*) , et des clapets de refoulement (7,7'), caractérisée en ce qu'elle comporte à chaque extrémité de sa course à l'in¬ térieur d'un cylindre fermé (5) au moins un poussoir (9,9') enfoncés alternativement par le piston (1) pour transmettre le signal d'inversion au tiroir pilote (13) par l'intermédiai¬ re d'une colonne liquide (10,10') et comportant à chaque ex¬ trémité du tiroir (13) au moins un canal (17,17') alternative¬ ment ouvert ou fermé par le tiroir (15) pour autoriser d'un côté et condamner de l'autre l'échappement des colonnes liqui¬ des (10,10') afin de préparer l'inversion suivante du tiroir (13)1) Self-reversible reciprocating piston pump with hydraulic transmission of the inversion signal (25) comprising an energy supply (3) leading to a main drawer (15) whose reversal controlled by a pilot drawer (13) makes it possible to di ¬ erect alternately with supply channels (4, 4 ') the energy of the inlet (3) to one side or the other of an udder ¬ tone control (1) which acts on the controlled pistons (2.2 ′) in order to suck in and discharge a fluid passing through enclosures (6.6 ′) through suction valves (8.8 *), and discharge valves (7.7 ′) , characterized in that it comprises at each end of its stroke inside a closed cylinder (5) at least one pusher (9,9 ') depressed alternately by the piston (1) to transmit the signal inversion of the pilot drawer (13) via a liquid column (10,10 ') and comprising at each end of the drawer (13) at least one alternating channel (17,17') e¬ ment opened or closed by the drawer (15) to allow on one side and condemn on the other the escape of liquid columns (10,10 ') to prepare the next inversion of the drawer (13)
2) Pompe à piston alternatif selon la revendication 1 caracté¬ risée en ce que les colonnes liquides (10,10') constituent l'é¬ lément de liaison entre les poussoirs (9,9') et le tiroir (13) et qu'elles comportent des clapets anti retour (11,11') pour assurer leur remplissage (12,12') pour limiter leur pression (16,16') pour s'opposer à l'inversion prématurée du tiroir (13) en cas de cavitation.2) reciprocating piston pump according to claim 1 caracté¬ ized in that the liquid columns (10,10 ') constitute the connecting element between the pushers (9,9') and the drawer (13) and that 'they include non-return valves (11,11') to ensure their filling (12,12 ') to limit their pressure (16,16') to oppose the premature inversion of the drawer (13) in the event of cavitation.
3) Pompe à piston alternatif selon l'une des revendications 1 ou 2 caractérisée en ce que les canaux (17,17') comportent un clapet anti retour (14,14') destiné à s'opposer aux fuites éventuelles du tiroir (15) pour éviter l'inversion prématurée du tiroir (13) . 4) Pompe à pi r. ton alternatif selon l'une quelconque des re¬ vendications 1 à 3 caractérisée en ce que le prolongement de l'arrivée (3) dirigée vers le tiroir (13) comporte un ré¬ ducteur de pression (19) permettant de limiter l'énergie des¬ tinée à déplacer le tiroir (15).3) Reciprocating piston pump according to one of claims 1 or 2 characterized in that the channels (17,17 ') include a non-return valve (14,14') intended to oppose any leaks from the drawer (15 ) to avoid premature reversal of the drawer (13). 4) Foot pump. alternative tone according to any one of the re¬ vendications 1 to 3 characterized in that the extension of the inlet (3) directed towards the drawer (13) comprises a pressure reducer (19) making it possible to limit the energy intended to move the drawer (15).
5) Pompe à piston alternatif selon l'une quelconque des re¬ vendications 1 à 4 caractérisée en ce qu'elle comporte une tige témoin (21) solidaire du tiroir (13) pour permettre sa manoeu¬ vre de l'extérieur afin d'amorcer le mouvement alternatif lors de la première mise en service.5) Reciprocating piston pump according to any one of re¬ vendications 1 to 4 characterized in that it comprises a control rod (21) integral with the drawer (13) to allow its maneuver ¬ vre from the outside in order to initiate the reciprocating movement during the first start-up.
6) Pompe à piston alternatif selon l'une quelconque des reven¬ dications 1 à 5 caractérisée en ce que les poussoirs (9,9') sont alternativement repoussés en l'absence de pression dans les canaux (4,4') par des ressorts (20,20').6) Reciprocating piston pump according to any one of reven¬ dications 1 to 5 characterized in that the pushers (9,9 ') are alternately pushed back in the absence of pressure in the channels (4,4') by springs (20,20 ').
7) Pompe à piston alternatif selon l'une quelconque des reven¬ dications 1 à 6 caractérisée en ce qu'elle comprend en outre au moins un clapet d'aspiration (8,8') destiné à assurer le remplissage des enceintes (6,6') et un clapet de refoulement (7,7') destinés à s'opposer au retour de l'énergie produite par les pistons (2,2').7) Reciprocating piston pump according to any one of reven¬ dications 1 to 6 characterized in that it further comprises at least one suction valve (8,8 ') intended to fill the enclosures (6, 6 ') and a discharge valve (7.7') intended to oppose the return of the energy produced by the pistons (2.2 ').
8) Pompe à piston alternatif selon l'une quelconque des reven¬ dications 1 à 7 caractérisée en ce que l'étanchéité des pistons commandés (2,2') est assurée par des joints (23,23') appropriés à la pression et au fluide admis dans les enceintes (6,6'). 8) Reciprocating piston pump according to any one of reven¬ dications 1 to 7 characterized in that the tightness of the controlled pistons (2,2 ') is ensured by seals (23,23') suitable for 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
FR8901493 1989-02-06
FR8901493A FR2642796B1 (en) 1989-02-06 1989-02-06 SELF-REVERSIBLE RECIPROCATING PISTON PUMP WITH HYDRAULIC REVERSE SIGNAL TRANSMISSION

Publications (2)

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

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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

Non-Patent Citations (1)

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Title
See references of WO9008896A1 *

Also Published As

Publication number Publication date
FR2642796A1 (en) 1990-08-10
EP0426772B1 (en) 1993-11-18
WO1990008896A1 (en) 1990-08-09
DE69004667T2 (en) 1994-05-19
CA2026986A1 (en) 1990-08-07
FR2642796B1 (en) 1994-05-06
AU5158490A (en) 1990-08-24
DE69004667D1 (en) 1993-12-23

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