EP1646791B1 - Reversing control device for distributing high-pressure fluid - Google Patents
Reversing control device for distributing high-pressure fluid Download PDFInfo
- Publication number
- EP1646791B1 EP1646791B1 EP04767315A EP04767315A EP1646791B1 EP 1646791 B1 EP1646791 B1 EP 1646791B1 EP 04767315 A EP04767315 A EP 04767315A EP 04767315 A EP04767315 A EP 04767315A EP 1646791 B1 EP1646791 B1 EP 1646791B1
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- European Patent Office
- Prior art keywords
- slide
- plunger
- pressure
- push
- rod
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- 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.)
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- 239000012530 fluid Substances 0.000 title claims description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 20
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 14
- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 230000000284 resting effect Effects 0.000 claims description 2
- 230000000994 depressogenic effect Effects 0.000 description 7
- 208000031968 Cadaver Diseases 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000021183 entrée Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
Definitions
- the present invention relates to a device for dispensing pressurized fluid used, for example, to control one or more pressurized fluid user systems from a control member, in particular maneuvered by means of a pedal.
- the invention relates to a device for dispensing pressurized fluid installed on board a public works machine.
- Such pressurized fluid dispensing devices generally make it possible to increase the regulated pressure in the outlet pipe when the pusher is controlled towards its depressed position.
- a known solution is to place the regulation on the opposite side to that desired at the control. In the neutral position, the pusher is then fully pressed and the pressure is maximum. In order to cause the decrease in pressure, it controls the raising of the pusher.
- This device has the disadvantage of not exerting a positive action on the pusher so that it may become stuck in the depressed position. In addition, it is necessary to implement a second pusher that remembers the control member of the first pusher in the neutral position. The size of the device is then increased and the cost is high.
- the present invention therefore aims to provide a pressurized fluid dispenser device which reduces the load in the outlet pipe when the pusher is actuated from its rest position to its depressed position.
- the device for dispensing pressurized fluid is essentially characterized in that the pusher comprises a central bore which opens at the level of the foot of said pusher, in that the head of the plunger is mounted to move inside. the bore of the pusher, and in that the regulating spring is housed in the central bore of the pusher being interposed between the enlarged head of the plunger and the bottom of the cup, so that the depression of the pusher causes an expansion of the control spring and a decrease the value of the regulated pressure in the outlet pipe.
- the dispensing device implements a single pusher which allows to control a pressure decrease in the outlet pipe by depression of the pusher.
- the staged drawer comprises a central groove whose annular section increases in the direction of the free end of the drawer.
- the slide comprises a central compensation bore which opens at the free end of the slide and which is connected to a transverse bore which opens into the main clearing chamber for at least temporary communication of said two chambers.
- a channel external to the drawer is formed in the body to put in communication at least temporarily the two main and auxiliary chambers.
- the throat of the slide is in permanent connection with the outlet pipe regardless of the axial position of the slide.
- the pressure fluid dispensing device as shown in FIGS. 1 to 3, and generally designated by the reference numeral 1, comprises a body 2 in which is mounted at less a pressure reducer 3 and which, facing an upper face 4, supports a control member (not shown) able to modify the pressure regulated by the pressure reducer 3.
- This pressure reducer 3 has, in a manner known per se, a pusher 5 which extends between a head 6 and a foot 7, and which is slidably mounted at the upper end 4 of the body 2, in a movement of back and forth between a rest position as shown in Figures 1 and 2, and a depressed position as shown in Figure 3.
- the head 6 is biased by the control member to allow to control at least one organ receiver external to the device (not shown).
- a distribution channel 10 is formed in the body 2 and extends between a first end 11 which opens into a main compensation chamber 15, and a second end 12 which opens into a blind auxiliary compensation chamber 16.
- the main compensation chamber 15 is intended to be connected to a low-pressure fluid line 20 while the auxiliary compensation chamber 16 is blinded by means of, for example, a plug 18.
- an inlet pipe 21 opens laterally into the distribution channel 10 and is intended to be connected to a source of high pressure fluid.
- the pressure reducer 3 further comprises an outlet pipe 22 which opens into the distribution channel 10, and which is intended to be connected to the hydraulic receiver to be controlled.
- the outlet pipe 22 is connected to the distribution channel 10 between the inlet pipe 21 and the auxiliary compensation chamber 16.
- the pressure reducer 3 has a plunger 25 integral in displacement of a dispensing spool 30 between a start position of stroke and an end position to provide the pressure regulating function.
- the plunger 25 extends between an enlarged head 26 and a connecting foot 27 at which the distribution spool 30 is connected forming a shoulder 28.
- the plunger 25 is movable in translation inside the main compensation chamber 15.
- the dispensing spool 30 has a first end 31 which is integral with the connecting foot 27 of the plunger 25 and a second free end 32 opposite the first end and which is turned towards the auxiliary compensation chamber 16.
- the dispensing spool 30 and the plunger 25 may for example form a single piece.
- a cup 35 is mounted coaxially with the plunger 25 while being in simple support against the foot 7 of the pusher 5.
- a return spring 40 is housed in the main compensation chamber 15 to be interposed between the cup 35 and the bottom 17 of this main compensation chamber 15. This spring of reminder is coaxial to the cup and is located outside of it.
- the pusher 5 is recessed over most of its length and has a central bore 45 which opens at the foot 7 of this pusher.
- the pusher 5 may be a non-recessed piece which is extended by a hollow cylindrical body forming a liner. This hollow body is functionally similar to the hollow pusher over part of its length.
- the foot 7 may then for example be integral with the cup instead of being integral with the pusher, the cup thus extending upwards, in the direction of the pusher.
- the enlarged head 26 of the plunger 25 is movably mounted inside the central bore 45 of the pusher 5 and is urged towards the bottom of this bore by a regulating spring 50.
- This regulating spring 50 is housed inside. the bore 45 of the pusher 5 being mounted concentrically to the plunger 25. It is interposed between the underside of the enlarged head 26 of the plunger 25 and the bottom 37 of the cup 35.
- the plunger 25 thus extends to the Inside the regulating spring 50.
- the enlarged head 26 is movably mounted inside the hollow body which acts as a jacket for this head.
- the distribution spool 30 has on the one hand, an axial central bore 33 which opens at the free end 32 of this drawer to be connected to the auxiliary compensation chamber 16 and secondly, a transverse bore 34 which opens into the main compensation chamber 15 and which is connected to the axial bore 33.
- the central bore 33 may be provided with a restriction 42 which opens into the auxiliary chamber 16.
- the axial bores 33 and 34 transverse allow to put in permanent communication the two main compensation chamber 15 and auxiliary 16.
- this permanent communication is obtained by replacing the two bores 33 and 34 with a channel 43 external to the drawer, being formed in the body 2 of the device 1.
- This channel 43 is represented in FIGS. 1 to 3 in dashed lines .
- the compensation slide 30 has, in its central part, a groove 37 whose annular section increases in the direction of the free end 32 of the slide 30.
- This central groove 37 defines on the surface exterior of the spool 30 an upstream annular shoulder 38 and a downstream annular shoulder 39 which extend substantially transversely to the longitudinal axis of the spool.
- the surface of the upstream shoulder 38 is smaller than the surface of the downstream shoulder 39 so that the increase of the pressure in the inlet pipe 21 causes the slide 30 to move towards the auxiliary compensation chamber 16 .
- the central groove 37 is, regardless of the position of the distribution spool 30 inside the distribution channel 10, in permanent connection with the outlet pipe 22.
- the drawer 30 is then in an equilibrium position in which it is no longer in abutment against the bottom of the cup, the shoulder 28 of this drawer having been removed from this bottom.
- a so-called high pressure is then exerted in the outlet pipe 22.
- this pressure exiting through the pipe 22 it is sufficient to control the depression of the pusher 5 by pressing on its head 6 (FIG. 3), this movement causes the compression spring 50 to relax.
- the slide 30 can then again be in abutment against the bottom of the cup, by its shoulder 28.
- the pressurized fluid dispenser according to the present invention thus enables the fluid pressure to be controlled in the outlet line 22 from a high value when the pusher is not depressed to a lower position when this pusher is pressed inside. of the clearing house.
- the pressure regulation will thus be considered as inverted.
- the regulating spring gives the spool valve a set point from bottom to top.
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- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid-Driven Valves (AREA)
- Devices For Dispensing Beverages (AREA)
- Fluid-Pressure Circuits (AREA)
- Lift Valve (AREA)
- Reciprocating Pumps (AREA)
- Nozzles (AREA)
- Coating Apparatus (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Multiple-Way Valves (AREA)
Abstract
Description
La présente invention a pour objet un dispositif distributeur de fluide sous pression utilisé par exemple pour assurer la commande d'un ou plusieurs systèmes utilisateurs de fluide sous pression à partir d'un organe de commande notamment manoeuvré au moyen d'une pédale.The present invention relates to a device for dispensing pressurized fluid used, for example, to control one or more pressurized fluid user systems from a control member, in particular maneuvered by means of a pedal.
Dans une application préférée mais non exclusive, l'invention concerne un dispositif distributeur de fluide sous pression installé à bord d'un engin de travaux publics.In a preferred but not exclusive application, the invention relates to a device for dispensing pressurized fluid installed on board a public works machine.
Les dispositifs distributeurs de fluide sous pression habituellement rencontrés (par exemple dans le document US 5 251 660) comprennent un corps qui loge au moins un réducteur de pression et qui supporte, en regard d'une face supérieure, un organe de commande propre à modifier la pression régulée par le réducteur de pression, le réducteur de pression comportant :
- un poussoir qui s'étend entre une tête et un pied, qui est monté coulissant au niveau de l'extrémité supérieure du corps, selon un mouvement de va-et-vient entre une position de repos et une position enfoncée, la tête étant sollicitée par l'organe de commande pour permettre la commande d'au moins un récepteur extérieur au dispositif,
- un canal de distribution ménagé dans le corps et qui est en relation à ses extrémités respectivement avec une chambre de compensation principale destinée à être raccordée à un conduite de fluide basse pression et une chambre de compensation auxiliaire borgne, les deux chambres principale et auxiliaire étant en communication au moins temporairement,
- une conduite d'entrée qui débouche dans le canal de distribution, et qui est raccordée à une source de fluide haute pression,
- une conduite de sortie qui débouche dans le canal de distribution et qui est destinée à être raccordée au récepteur à commander,
- un plongeur qui est mobile en translation à l'intérieur de la chambre de compensation et qui comprend une tête élargie ainsi qu'un pied de liaison,
- un tiroir de distribution étagé qui est solidaire en mouvement du plongeur entre une position de début et une position de fin de course pour assurer la fonction de régulation de pression, le tiroir comprenant une première extrémité solidaire du pied de liaison du plongeur en formant un épaulement et une deuxième extrémité libre opposée à la première extrémité et tournée vers la chambre de compensation auxiliaire,
- une coupelle qui est montée coaxiale au plongeur en étant en appui contre le pied du poussoir,
- un ressort de rappel qui est logé dans la chambre de compensation principale, qui est interposé entre la coupelle et le fond de la chambre de compensation principale et qui sollicite élastiquement la coupelle contre le poussoir, et
- un ressort de régulation.
- a pusher which extends between a head and a foot, which is slidably mounted at the upper end of the body, reciprocating between a resting position and a depressed position, the head being urged by the control member to allow the control of at least one receiver external to the device,
- a distribution channel formed in the body and which is connected at its ends respectively with a main compensation chamber intended to be connected to a low-pressure fluid line and a blind auxiliary compensation chamber, the two main and auxiliary chambers being in communication at least temporarily,
- an inlet pipe which opens into the distribution channel and which is connected to a source of high pressure fluid,
- an outlet pipe which opens into the distribution channel and which is intended to be connected to the receiver to be controlled,
- a plunger which is movable in translation inside the compensation chamber and which comprises an enlarged head and a connecting foot,
- a stepped distribution spool which is integral in motion of the plunger between a start position and a limit position for performing the pressure regulating function, the slide comprising a first end secured to the plunger's connecting foot by forming a shoulder and a second free end opposite the first end and facing the auxiliary compensation chamber,
- a cup which is mounted coaxially with the plunger while bearing against the foot of the pusher,
- a return spring which is housed in the main compensation chamber, which is interposed between the cup and the bottom of the main compensation chamber and which elastically urges the cup against the pusher, and
- a control spring.
De tels dispositifs distributeurs de fluide sous pression permettent généralement d'augmenter la pression régulée dans la conduite de sortie lorsque le poussoir est commandé vers sa position enfoncée.Such pressurized fluid dispensing devices generally make it possible to increase the regulated pressure in the outlet pipe when the pusher is controlled towards its depressed position.
Toutefois, pour certaines applications, il est nécessaire au contraire d'obtenir une pression régulée plus faible au fur et à mesure de l'enfoncement du poussoir.However, for some applications, it is necessary on the contrary to obtain a lower regulated pressure as the depression of the pusher.
Une solution connue consiste à placer la régulation sur le côté opposé à celui souhaité au niveau de la commande. En position neutre, le poussoir est alors actionné à fond et la pression est maxi. Afin de provoquer la diminution de la pression, on commande la remontée du poussoir. Ce dispositif possède l'inconvénient de ne pas exercer une action positive sur le poussoir de sorte que celui-ci risque de rester coincé en position enfoncée. De plus, il est nécessaire de mettre en oeuvre un deuxième poussoir qui permet de rappeler l'organe de commande du premier poussoir en position neutre. L'encombrement du dispositif est alors augmenté et le prix de revient est élevé.A known solution is to place the regulation on the opposite side to that desired at the control. In the neutral position, the pusher is then fully pressed and the pressure is maximum. In order to cause the decrease in pressure, it controls the raising of the pusher. This device has the disadvantage of not exerting a positive action on the pusher so that it may become stuck in the depressed position. In addition, it is necessary to implement a second pusher that remembers the control member of the first pusher in the neutral position. The size of the device is then increased and the cost is high.
La présente invention a donc pour but de fournir un dispositif distributeur de fluide sous pression qui permet de diminuer la charge dans la conduite de sortie lorsque l'on actionne le poussoir depuis sa position repos vers sa position enfoncée.The present invention therefore aims to provide a pressurized fluid dispenser device which reduces the load in the outlet pipe when the pusher is actuated from its rest position to its depressed position.
A cet effet, le dispositif distributeur de fluide sous pression selon la présente invention est essentiellement caractérisé en ce que le poussoir comprend un alésage central qui débouche au niveau du pied dudit poussoir, en ce que la tête du plongeur est montée mobile à l'intérieur de l'alésage du poussoir, et en ce que le ressort de régulation est logé dans l'alésage central du poussoir en étant interposé entre la tête élargie du plongeur et le fond de la coupelle, de sorte que l'enfoncement du poussoir provoque une détente du ressort de régulation et une diminution de la valeur de la pression régulée dans la conduite de sortie.For this purpose, the device for dispensing pressurized fluid according to the present invention is essentially characterized in that the pusher comprises a central bore which opens at the level of the foot of said pusher, in that the head of the plunger is mounted to move inside. the bore of the pusher, and in that the regulating spring is housed in the central bore of the pusher being interposed between the enlarged head of the plunger and the bottom of the cup, so that the depression of the pusher causes an expansion of the control spring and a decrease the value of the regulated pressure in the outlet pipe.
Ainsi, grâce à ces dispositions, le dispositif distributeur selon la présente invention met en oeuvre un seul poussoir qui permet de commander une diminution de pression dans la conduite de sortie par enfoncement du poussoir.Thus, thanks to these provisions, the dispensing device according to the present invention implements a single pusher which allows to control a pressure decrease in the outlet pipe by depression of the pusher.
De préférence, le tiroir étagé comprend une gorge centrale dont la section annulaire augmente en direction de l'extrémité libre du tiroir.Preferably, the staged drawer comprises a central groove whose annular section increases in the direction of the free end of the drawer.
Avantageusement, le tiroir comprend un alésage central de compensation qui débouche à l'extrémité libre du tiroir et qui est relié à un alésage transversal qui débouche dans la chambre de compensation principale pour la mise en communication au moins temporaire desdites deux chambres.Advantageously, the slide comprises a central compensation bore which opens at the free end of the slide and which is connected to a transverse bore which opens into the main clearing chamber for at least temporary communication of said two chambers.
En variante, un canal externe au tiroir est ménagé dans le corps pour mettre en communication au moins temporairement les deux chambres principale et auxiliaire.Alternatively, a channel external to the drawer is formed in the body to put in communication at least temporarily the two main and auxiliary chambers.
De manière préférée, la gorge du tiroir est en liaison permanente avec la conduite de sortie quelle que soit la position axiale du tiroir.Preferably, the throat of the slide is in permanent connection with the outlet pipe regardless of the axial position of the slide.
Diverses autres caractéristiques de l'invention ressortent de la description effectuée ci-après, à titre d'exemple non limitatif, faite en référence au dessin annexé qui illustre une forme préférée de réalisation d'un dispositif distributeur de fluide sous pression.
- La figure 1 est une vue en coupe longitudinale d'un dispositif distributeur de fluide selon l'invention, aucune pression de fluide ne traversant le réducteur de pression.
- La figure 2 est une vue en coupe transversale du dispositif de la figure 1, une pression étant appliquée et le poussoir étant dans sa position de repos ou non activée.
- La figure 3 est une vue analogue à celle de la figure 2, le poussoir étant commandé vers sa position enfoncée pour provoquer une diminution de pression dans la conduite de sortie.
- Figure 1 is a longitudinal sectional view of a fluid dispensing device according to the invention, no fluid pressure passing through the pressure reducer.
- Figure 2 is a cross-sectional view of the device of Figure 1, a pressure being applied and the pusher being in its rest position or not activated.
- Figure 3 is a view similar to that of Figure 2, the pusher being controlled to its depressed position to cause a decrease in pressure in the outlet pipe.
Le dispositif distributeur de fluide sous pression conforme à l'invention, tel que représenté aux figures 1 à 3, et désigné dans son ensemble par la référence numérique 1, comprend un corps 2 dans lequel est monté au moins un réducteur de pression 3 et qui supporte, en regard d'une face supérieure 4, un organe de commande (non représenté) propre à modifier la pression régulée par le réducteur de pression 3.The pressure fluid dispensing device according to the invention, as shown in FIGS. 1 to 3, and generally designated by the reference numeral 1, comprises a
Ce réducteur de pression 3 possède, de manière connue en soi, un poussoir 5 qui s'étend entre une tête 6 et un pied 7, et qui est monté coulissant au niveau de l'extrémité supérieure 4 du corps 2, selon un mouvement de va-et-vient entre une position de repos telle que représentée aux figures 1 et 2, et une position enfoncée telle que représentée à la figure 3. La tête 6 est sollicitée par l'organe de commande pour permettre de commander au moins un organe récepteur extérieur au dispositif (non représenté).This
Par ailleurs, un canal de distribution 10 est ménagé dans le corps 2 et s'étend entre une première extrémité 11 qui débouche dans une chambre de compensation principale 15, et une deuxième extrémité 12 qui débouche dans une chambre de compensation auxiliaire borgne 16.Furthermore, a
De manière connue en soi, la chambre de compensation principale 15 est destinée à être raccordée à une conduite de fluide basse pression 20 tandis que la chambre de compensation auxiliaire 16 est rendue borgne au moyen par exemple d'un bouchon 18.In a manner known per se, the
Par ailleurs, une conduite d'entrée 21 débouche latéralement dans le canal de distribution 10 et est destinée à être raccordée à une source de fluide haute pression.Furthermore, an
Bien entendu, il doit être noté que le fluide circulant dans la conduite d'entrée 21 et le fluide circulant dans les chambres de compensation principale 15 et auxiliaire 16 sont qualifiés respectivement de haute et basse pression l'un par rapport à l'autre, indépendamment de toute valeur absolue de pression.Of course, it should be noted that the fluid flowing in the
Le réducteur de pression 3 comporte en outre une conduite de sortie 22 qui débouche dans le canal de distribution 10, et qui est destinée à être raccordée au récepteur hydraulique à commander. La conduite de sortie 22 est raccordée au canal de distribution 10, entre la conduite d'entrée 21 et la chambre auxiliaire de compensation 16.The
Par ailleurs, le réducteur de pression 3 possède un plongeur 25 solidaire en déplacement d'un tiroir de distribution 30 entre une position de début de course et une position de fin de course pour assurer la fonction de régulation de pression.Furthermore, the
Le plongeur 25 s'étend entre une tête élargie 26 et un pied de liaison 27 au niveau duquel le tiroir de distribution 30 est raccordé en formant un épaulement 28. Le plongeur 25 est mobile en translation à l'intérieur de la chambre de compensation principale 15.The
Le tiroir de distribution 30 possède une première extrémité 31 qui est solidaire du pied de liaison 27 du plongeur 25 et une deuxième extrémité libre 32 opposée à la première extrémité et qui est tournée vers la chambre de compensation auxiliaire 16. Le tiroir de distribution 30 et le plongeur 25 peuvent par exemple former une seule pièce monobloc.The dispensing
De manière encore connue en soi, une coupelle 35 est montée coaxiale au plongeur 25 en étant en simple appui contre le pied 7 du poussoir 5.In a manner also known per se, a
Afin de solliciter cette coupelle 35 contre le pied 7 du poussoir 5, un ressort de rappel 40 est logé dans la chambre de compensation principale 15 pour être interposé entre la coupelle 35 et le fond 17 de cette chambre de compensation principale 15. Ce ressort de rappel est coaxial à la coupelle et est situé à l'extérieur de celle-ci.In order to urge this
Selon une caractéristique essentielle de la présente invention, le poussoir 5 est évidé sur la majeure partie de sa longueur et possède un alésage central 45 qui débouche au niveau du pied 7 de ce poussoir. En variante, le poussoir 5 peut être une pièce non évidée qui se prolonge par un corps cylindrique creux formant chemise. Ce corps creux est fonctionnellement similaire au poussoir évidé sur une partie de sa longueur. Le pied 7 peut alors être par exemple solidaire de la coupelle au lieu d'être solidaire du poussoir, la coupelle se prolongeant ainsi vers le haut, en direction du poussoir.According to an essential characteristic of the present invention, the
La tête élargie 26 du plongeur 25 est montée mobile à l'intérieur de l'alésage central 45 du poussoir 5 et est sollicitée vers le fond de cet alésage par un ressort de régulation 50. Ce ressort de régulation 50 est logé à l'intérieur de l'alésage 45 du poussoir 5 en étant monté concentrique au plongeur 25. Il est interposé entre la face inférieure de la tête élargie 26 du plongeur 25 et le fond 37 de la coupelle 35. Le plongeur 25 s'étend ainsi à l'intérieur du ressort de régulation 50. Dans la variante précitée, la tête élargie 26 est montée mobile à l'intérieur du corps creux qui joue le rôle de chemise pour cette tête. Le fait de prévoir un poussoir creux permet avantageusement un gain de place.The
Par ailleurs, le tiroir de distribution 30 possède d'une part, un alésage central axial 33 qui débouche au niveau de l'extrémité libre 32 de ce tiroir pour être relié à la chambre de compensation auxiliaire 16 et d'autre part, un alésage transversal 34 qui débouche dans la chambre de compensation principale 15 et qui est relié à l'alésage axial 33. Au niveau de l'extrémité libre 32 du tiroir 30, l'alésage central 33 peut être muni d'une restriction 42 qui débouche dans la chambre auxiliaire 16. Les alésages axial 33 et trensversal 34 permettent de mettre en communication permanente les deux chambres de compensation principale 15 et auxiliaire 16.Furthermore, the
En variante, cette mise en communication permanente est obtenue en remplaçant les deux alésages 33 et 34 par un canal 43 externe au tiroir, en étant ménagé dans le corps 2 du dispositif 1. Ce canal 43 est représenté aux figures 1 à 3 en traits pointillés.As a variant, this permanent communication is obtained by replacing the two
Selon une autre caractéristique essentielle de la présente invention, le tiroir de compensation 30 possède, dans sa partie centrale, une gorge 37 dont la section annulaire augmente en direction de l'extrémité libre 32 du tiroir 30. Cette gorge centrale 37 définit sur la surface extérieure du tiroir 30 un épaulement annulaire amont 38 et un épaulement annulaire aval 39 qui s'étendent sensiblement transversalement à l'axe longitudinal du tiroir. La surface de l'épaulement amont 38 est inférieure à la surface de l'épaulement aval 39 de sorte que l'augmentation de la pression dans la conduite d'entrée 21 provoque le déplacement du tiroir 30 en direction de la chambre de compensation auxiliaire 16.According to another essential characteristic of the present invention, the
La gorge centrale 37 est, quelle que soit la position du tiroir de distribution 30 à l'intérieur du canal de distribution 10, en liaison permanente avec la conduite de sortie 22.The
Ainsi, lorsqu'aucune pression n'est envoyée dans le réducteur de pression 3, comme cela est représenté à la figure 1, le ressort de rappel 45 repousse vers le haut la coupelle 35 tandis que le ressort de régulation 50 qui est un ressort de compression tant à écarter la tête élargie 26 par rapport au fond 37 de la coupelle 35. Le tiroir 30 est en butée haute contre la coupelle par appui de l'épaulement 28 sur le fond de cette coupelle, à l'extérieur de celle-ci.Thus, when no pressure is sent into the
Lorsque du fluide sous pression traverse la conduite d'entrée 21 (fiugure 2), le tiroir 30 est en équilibre sous l'action de la pression différentielle qui s'exerce dans la gorge centrale 37 d'une part et sous l'action du ressort de régulation 50 d'autre part.When fluid under pressure passes through the inlet pipe 21 (FIG. 2), the
Le tiroir 30 est alors dans une position d'équilibre dans laquelle il n'est plus en butée contre le fond de la coupelle, l'épaulement 28 de ce tiroir ayant été écarté de ce fond.The
Une pression dite élevée s'exerce alors dans la conduite de sortie 22. Lorsque l'on veut provoquer la diminution de cette pression sortant par la conduite 22, il suffit de commander l'enfoncement du poussoir 5 en appuyant sur sa tête 6 (figure 3), ce mouvement entraîne la détente du ressort de compression 50.A so-called high pressure is then exerted in the
Le tiroir 30 peut alors à nouveau être en butée contre le fond de la coupelle, par son épaulement 28.The
Le distributeur de fluide sous pression selon la présente invention permet ainsi de commander dans la conduite de sortie 22 la pression du fluide depuis une valeur élevée lorsque le poussoir n'est pas enfoncé vers une position plus faible lorsque ce poussoir est enfoncé à l'intérieur de la chambre de compensation. La régulation de pression va ainsi donc être considérée comme inversée. Le ressort de régulation donne au tiroir de distribution un consigne depuis le bas vers le haut.The pressurized fluid dispenser according to the present invention thus enables the fluid pressure to be controlled in the
L'invention n'est bien entendu pas limitée à l'exemple décrit ci-dessus et diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is of course not limited to the example described above and various modifications can be made without departing from its scope.
Claims (5)
- Pressurised-fluid distributing device comprising a body (2) which houses at least one pressure reducer (3) and carries, opposite an upper face (4), a control component suitable for modifying the pressure regulated by the pressure reducer (3), said pressure reducer (3) having:- a push-rod (5) which extends between a head (6) and a foot (7), which is mounted so as to slide, at the upper end (4) of the body (2), in a to-and-fro movement between a rest position and a driven-in position, said head (6) being impelled by the control component in order to permit the control of at least one driven part external to the device;- a distributing duct (10) which is arranged in the body and is in communication at its ends (11, 12) with, respectively, a main compensating chamber (15) intended for connection to a conduit (20) for low-pressure fluid and a blind auxiliary compensating chamber (16), the two main and auxiliary chambers being in communication, at least temporarily;- an inlet conduit (21) which emerges into the distributing duct (10) and which is connected to a source of high-pressure fluid;- an outlet conduit (22) which emerges into the distributing duct (10) and is intended for connection to the driven part to be controlled;- a plunger (25) which is movable in translation inside the compensating chamber and which comprises an enlarged head (26) and also a linking foot (27);- a tiered distributing slide (30) which is integral in motion with the plunger (25) between a start-of-travel position and an end-of-travel position in order to perform the pressure-regulating function, said slide (30) comprising a first end (31) which is integral with the linking foot (27) of the plunger (25), thereby forming a shoulder (28), and a second, free end (32) which is opposed to the first end (31) and faces towards the auxiliary compensating chamber (16) ;- an obturator ring (35) which is mounted so as to be coaxial with the plunger (25) while resting against the foot (7) of the push-rod (5);- a return spring (40) which is housed in the main compensating chamber (15), is interposed between the obturator ring (35) and the bottom (17) of said main compensating chamber (15), and impels said obturator ring (35) elastically against the push-rod (5); and- a regulating spring (50);characterised in that the push-rod (5) comprises a central bore (45) which emerges at the foot (7) of the said push-rod (5),
in that the enlarged head (26) of the plunger (25) is mounted in a movable manner inside the bore (45) in the push-rod (5), and
in that the regulating spring (50) is housed in the central bore (45) in the push-rod (5) while being interposed between the enlarged head (26) of the plunger (25) and the bottom (36) of the obturator ring (35), in such a way that the driving-in of the push-rod (25) brings about an expansion of the regulating spring (50) and a reduction in the value of the regulated pressure in the outlet conduit (22). - Device according to Claim 1, characterised in that the tiered slide (30) comprises a central channel (37) whose annular section increases in the direction of the free end (32) of said slide (30).
- Device according to Claim 2, characterised in that the slide (30) comprises a central compensating bore (33) which emerges at the free end (32) of said slide and is connected to a transverse bore (34) which emerges into the main compensating chamber (15) for the purpose of bringing the said two chambers into at least temporary communication.
- Device according to Claim 2, characterised in that a duct (43) external to the slide (30) is arranged in the body (2) in order to bring the two main (15) and auxiliary (16) chambers into communication, at least temporarily.
- Device according to any of Claims 2 to 4, characterised in that the channel (37) in the slide (30) is permanently linked with the outlet conduit (22), whatever the axial position of said slide (30).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL04767315T PL1646791T3 (en) | 2003-07-18 | 2004-06-10 | Reversing control device for distributing high-pressure fluid |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0308825A FR2857705B1 (en) | 2003-07-18 | 2003-07-18 | INVERSE REGULATING PRESSURE FLUID DISPENSER DEVICE |
PCT/FR2004/001450 WO2005017365A1 (en) | 2003-07-18 | 2004-06-10 | Reversing control device for distributing high-pressure fluid |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1646791A1 EP1646791A1 (en) | 2006-04-19 |
EP1646791B1 true EP1646791B1 (en) | 2006-11-08 |
Family
ID=33548266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04767315A Expired - Lifetime EP1646791B1 (en) | 2003-07-18 | 2004-06-10 | Reversing control device for distributing high-pressure fluid |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1646791B1 (en) |
AT (1) | ATE344884T1 (en) |
DE (1) | DE602004003148T2 (en) |
FR (1) | FR2857705B1 (en) |
PL (1) | PL1646791T3 (en) |
WO (1) | WO2005017365A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMO20050247A1 (en) | 2005-09-29 | 2007-03-30 | Studio Tecnico 6M Srl | VALVE FOR HYDRAULIC BRAKING OF OPERATING OR SIMILAR MACHINES |
DE102010006196A1 (en) * | 2010-01-29 | 2011-08-04 | Robert Bosch GmbH, 70469 | Hydraulic pilot control unit |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07103942B2 (en) * | 1988-03-31 | 1995-11-08 | 株式会社小松製作所 | Hydraulic pilot valve device |
US5251534A (en) * | 1992-04-29 | 1993-10-12 | Kayaba Industry Co. Ltd. | Input apparatus |
FR2781846B1 (en) * | 1998-07-28 | 2002-03-01 | Mannesmann Rexroth Sa | FLUID DISTRIBUTOR DEVICE, PARTICULARLY FOR HYDRAULIC REMOTE CONTROL |
-
2003
- 2003-07-18 FR FR0308825A patent/FR2857705B1/en not_active Expired - Fee Related
-
2004
- 2004-06-10 PL PL04767315T patent/PL1646791T3/en unknown
- 2004-06-10 DE DE602004003148T patent/DE602004003148T2/en not_active Expired - Lifetime
- 2004-06-10 AT AT04767315T patent/ATE344884T1/en not_active IP Right Cessation
- 2004-06-10 WO PCT/FR2004/001450 patent/WO2005017365A1/en active IP Right Grant
- 2004-06-10 EP EP04767315A patent/EP1646791B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
PL1646791T3 (en) | 2007-04-30 |
DE602004003148T2 (en) | 2007-08-02 |
WO2005017365A1 (en) | 2005-02-24 |
EP1646791A1 (en) | 2006-04-19 |
FR2857705B1 (en) | 2005-09-30 |
DE602004003148D1 (en) | 2006-12-21 |
ATE344884T1 (en) | 2006-11-15 |
FR2857705A1 (en) | 2005-01-21 |
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