EP0360718B1 - Pilot-operated regulating connector for regulating the speed of pneumatic actuators - Google Patents

Pilot-operated regulating connector for regulating the speed of pneumatic actuators Download PDF

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Publication number
EP0360718B1
EP0360718B1 EP89460027A EP89460027A EP0360718B1 EP 0360718 B1 EP0360718 B1 EP 0360718B1 EP 89460027 A EP89460027 A EP 89460027A EP 89460027 A EP89460027 A EP 89460027A EP 0360718 B1 EP0360718 B1 EP 0360718B1
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EP
European Patent Office
Prior art keywords
piston
seat
chamber
pilot
seal
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.)
Expired - Lifetime
Application number
EP89460027A
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German (de)
French (fr)
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EP0360718A1 (en
Inventor
Yves Levenez
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Legris SA
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Legris SA
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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7879—Resilient material valve
    • Y10T137/7888—With valve member flexing about securement
    • Y10T137/789—Central mount
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87499—Fluid actuated or retarded
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87539—Having guide or restrictor

Definitions

  • the speed of a double-acting pneumatic cylinder is adjusted for each direction of travel using a unidirectional flow limiter placed between the orifice of the cylinder through which air escapes during the set stroke and its distributor. power supply.
  • a unidirectional flow limiter placed between the orifice of the cylinder through which air escapes during the set stroke and its distributor. power supply.
  • Such an apparatus also called an adjuster, comprises an adjustment screw integral with a needle to limit at will the flow of exhaust air through its seat which thus determines the speed of the jack.
  • the regulator furthermore comprises a one-way valve opening in the direction of the intake flow rate and closing in the direction of the exhaust flow. This is how the unidirectional flow limiters described in document FR-A-2343280 operate.
  • the present invention makes it possible to achieve this object, by producing two-speed adjusters, the transition from one speed to a second set lower speed being effected by the arrival in the device of a pneumatic piloting signal. , and the reverse operation by the disappearance of this signal.
  • a pilot-operated fitting-regulator for adjusting the speed of pneumatic cylinders is mounted between a jack and its distributor, which fitting-regulator comprises a adjustment moving axially in a cylindrical housing of a body, and one end of which forms a needle cooperating with its seat to control the passage of the fluid from a first chamber delimited by an orifice connectable to the jack and said seat to a second delimited chamber by said seat and an orifice connectable to the dispenser;
  • the adjusting element is a piston comprising at least one seal ensuring it a sealed sliding, and which delimits a third chamber with an orifice for connection to a pipe by which a pressure signal acting acting on the face of the piston opposite the needle and driving it towards the closing of the seat, the stroke of the piston in closing of the seat being determined by a stop adjustable axially in position from the outside and on which it abuts by its end on the needle side.
  • a pilot-operated fitting-regulator comprises three connectable orifices; the first to one of the orifices of the jack through which the air leaves in the direction of travel whose speed is to be adjusted; the second to the corresponding orifice of the distributor, and the third to a pilot piping.
  • the air escaping from the jack during the race flows from the first to the second orifice and its flow rate through the seat is a function of the position of the needle which controls its passage.
  • the signal in the third chamber has the effect of moving the piston in the direction of the seat, and this stroke being limited by the internal end of the maneuverable stop from the outside on which it abuts by its needle end, the flow rate left at the exhaust air passing through the device, and therefore the speed of the jack, thus depends on the setting of this screw.
  • the stroke of the piston in opening the seat can also be limited by a second adjusting screw opposite the first, on which it abuts by its end opposite the needle: this second screw regulating a speed cylinder always higher than that set by the first which determines the passage through the seat in the presence of a piloting signal.
  • a return valve is arranged in bypass of the seat to open in the direction from the air intake to the cylinder and close in the direction of the purge flow from it.
  • the piloted adjuster comprises in a body 1, a piston 2 sliding in a cylindrical housing in a sealed manner by a seal 3, and one end of which forms a needle 15 cooperating with a seat 16 to control a flow of fluid coming from a first chamber 4 to a second chamber 5.
  • the first chamber 4 is delimited by the seat 16, an annular unidirectional valve 14 established in derivation of said seat, the joint 8 of an adjustment screw 7, and by a orifice connection 11.
  • the second chamber 5 is delimited by the seat 16, the valve 14, the seal 3 of the piston 2 and a connectable orifice 12.
  • the valve 14 is oriented so as to close at the flow of fluid flowing from chamber 4 to chamber 5 and opening in the opposite direction.
  • the adjuster also comprises a third chamber 6 delimited by the seal 3 of the piston 2, a plug closing the housing of said piston, the seal 10 of an adjustment screw 9 in the plug 1a and a connectable orifice 13.
  • the piloted regulator regulates the low rod exit speed of a jack 30, by the effect of a piloting signal, emitted by a sensor 50.
  • the air coming from the chamber purge cylinder, rod side flows into the adjuster from its orifice 11 to its orifice 12, closes the valve 14 at its own passage which can only be done through the seat 16 with a flow rate depending on the position of the needle 15.
  • the chamber 6 being under pressure, the piston 2 is pushed into abutment on the internal end 7a of the screw 7 which passes through the seat 16 in order to penetrate into a blind axial channel of the piston 2 and to improve its guidance.
  • the speed of the jack 30 is therefore adjusted by the screw 7.
  • the piston 2 In the absence of this signal, the piston 2 is held in the open position of the seat 16 by the effect of the pressure passing through l device in the chamber 5. The passage left to the exhaust flow through the seat 16 is then a function of the adjustment of the screw 9 on the internal end of which abuts the piston 2 by its face opposite the needle 15. The screw 9 therefore sets a jack speed always higher than that set by screw 7. The jack making its reverse stroke, the intake air passing through the adjuster from port 12 to port 11 opens the valve 14 and the full flow is thus ensured, whether the piloting signal is present or not at the orifice 13 and independently of the adjustment of the screws 7 and 9.
  • the sensor 50 can be operated either manually or by the rod of the jack 30 itself, or that of another cylinder.
  • the signal can also come from various sources, such as a timer, the start of another cylinder, sequencer, etc. It can only be issued for certain cylinder operating sequences in the cycle.
  • Figure 2 is the sectional representation of another embodiment of the invention which differs essentially from the embodiment previously described according to Figure 1, by its piston 2 which has two different sections defined by the seals 3 and 3a that door.
  • the seal 3a of larger diameter than that of the seal 3 is subjected to the pressure of the signal in the chamber 6; this arrangement allowing a possibly low pressure control signal.
  • Figure 3 is the sectional representation of another embodiment of the invention which, like the embodiment previously described according to Figure 2, comprises a stepped piston 2 capable of moving under the effect of a low pilot pressure.
  • the needle 15 of the piston 2 is extended by a rod 2a of small diameter which passes through the seat 16 and has at its end a piston section defined by its seal 3b weaker than that of the seat and that of the large section of the piston defined by the gasket 3.
  • the pressure passing through the device acts on the piston 2 in the direction of the opening of the seat 16 with a force resulting from the difference in sections 3-3b, while the opposing pressure of the signal acts on the full section 3.
  • the adjusting screw 7 of the low speed on the internal end of which abuts the piston 2 by its small section has no seal.
  • FIG. 4 is a sectional representation of another embodiment of a two-speed pilot-operated fitting-regulator according to the invention.
  • the arrangement of the piston 2 is here such that it tends to close the seat 16 in the direction of flow. exhaust air, that is to say from chamber 4 to chamber 5: this arrangement is more particularly applicable in devices of small bulk.
  • the adjusting screw 7 of the low speed has a screw thread on the left and the adjusting screw 9 for high speed, a screw thread on the right.
  • the orifices 11, 12 and 13 are equipped with instantaneous connection cartridges 11a, 12a, 13a.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Fluid-Driven Valves (AREA)
  • Lift Valve (AREA)
  • Actuator (AREA)

Description

La vitesse d'un vérin pneumatique à double effet se règle pour chaque sens de course à l'aide d'un limiteur de débit unidirectionnel placé entre l'orifice du vérin par lequel s'échappe l'air pendant la course réglée et son distributeur d'alimentation. Un tel appareil, encore appelé régleur, comporte une vis de réglage solidaire d'un pointeau pour limiter à volonté le débit d'air d'échappement à travers son siège qui détermine ainsi la vitesse du vérin. Pour permettre dans l'autre sens de course, l'admission à plein débit du fluide moteur dans cette même chambre, le régleur comporte en outre un clapet unidirectionnel s'ouvrant dans le sens du débit d'admission et se fermant dans le sens du débit d'échappement. Ainsi fonctionnent les limiteurs de débit unidirectionnel décrits dans le document FR-A-2343280.The speed of a double-acting pneumatic cylinder is adjusted for each direction of travel using a unidirectional flow limiter placed between the orifice of the cylinder through which air escapes during the set stroke and its distributor. power supply. Such an apparatus, also called an adjuster, comprises an adjustment screw integral with a needle to limit at will the flow of exhaust air through its seat which thus determines the speed of the jack. To allow, in the other direction of travel, the admission at full flow rate of the working fluid into this same chamber, the regulator furthermore comprises a one-way valve opening in the direction of the intake flow rate and closing in the direction of the exhaust flow. This is how the unidirectional flow limiters described in document FR-A-2343280 operate.

Ces régleurs connus ne permettent qu'une seule vitesse réglée pour un sens de course du vérin, vitesse qui s'établit dès le départ et reste constante. Or, dans un grand nombre de cas de figure, on aimerait disposer pendant chaque course et sur commande, de deux vitesses de valeurs différentes, ce qui aurait pour effet d'augmenter les cadences tout en évitant les chocs de fin de course, ou encore d'obtenir facilement une vitesse rapide d'un outil suivi d'une vitesse de travail plus lente.These known adjusters allow only a single speed set for a direction of travel of the jack, a speed which is established from the start and remains constant. However, in a large number of scenarios, we would like to have, during each race and on command, two speeds of different values, which would have the effect of increasing the cadences while avoiding end-of-travel shocks, or easily obtain a fast tool speed followed by a slower working speed.

La présente invention permet d'atteindre ce but, par la réalisation de régleurs à deux vitesses, le passage d'une vitesse à une seconde vitesse réglée plus faible s'effectuant par l'arrivée dans l'appareil d'un signal pneumatique de pilotage, et l'opération inverse par la disparition de ce signal.The present invention makes it possible to achieve this object, by producing two-speed adjusters, the transition from one speed to a second set lower speed being effected by the arrival in the device of a pneumatic piloting signal. , and the reverse operation by the disappearance of this signal.

A cet effet, un raccord-régleur piloté pour le réglage de vitesse des vérins pneumatiques se montant entre un vérin et son distributeur, lequel raccord-régleur comprend un élément de réglage se déplaçant axialement dans un logement cylindrique d'un corps, et dont une extrémité forme un pointeau coopérant avec son siège pour contrôler le passage du fluide d'une première chambre délimitée par un orifice raccordable au vérin et ledit siège vers une seconde chambre délimitée par ledit siège et un orifice raccordable au distributeur;To this end, a pilot-operated fitting-regulator for adjusting the speed of pneumatic cylinders is mounted between a jack and its distributor, which fitting-regulator comprises a adjustment moving axially in a cylindrical housing of a body, and one end of which forms a needle cooperating with its seat to control the passage of the fluid from a first chamber delimited by an orifice connectable to the jack and said seat to a second delimited chamber by said seat and an orifice connectable to the dispenser;

est caractérisé en ce que l'élément de réglage est un piston comportant au moins un joint lui assurant un glissement étanche, et qui délimite une troisième chambre avec un orifice de raccordement à une tuyauterie par laquelle arrive un signal de pression agissant sur la face du piston opposée au pointeau et l'entraînant vers la fermeture du siège, la course du piston en fermeture du siège étant déterminée par une butée réglable axialement en position de l'extérieur et sur laquelle il vient buter par son extrémité côté pointeau.is characterized in that the adjusting element is a piston comprising at least one seal ensuring it a sealed sliding, and which delimits a third chamber with an orifice for connection to a pipe by which a pressure signal acting acting on the face of the piston opposite the needle and driving it towards the closing of the seat, the stroke of the piston in closing of the seat being determined by a stop adjustable axially in position from the outside and on which it abuts by its end on the needle side.

Selon l'invention, un raccord-régleur piloté comporte trois orifices raccordables; le premier à un des orifices du vérin par lequel sort l'air dans le sens de course dont on veut régler la vitesse; le second à l'orifice correspondant du distributeur, et le troisième à une tuyauterie de pilotage. L'air s'échappant du vérin pendant la course s'écoule du premier au second orifice et son débit à travers le siège est fonction de la position du pointeau qui en contrôle le passage.According to the invention, a pilot-operated fitting-regulator comprises three connectable orifices; the first to one of the orifices of the jack through which the air leaves in the direction of travel whose speed is to be adjusted; the second to the corresponding orifice of the distributor, and the third to a pilot piping. The air escaping from the jack during the race flows from the first to the second orifice and its flow rate through the seat is a function of the position of the needle which controls its passage.

Le signal dans la troisième chambre a pour effet de déplacer le piston en direction du siège, et cette course étant limitée par l'extrémité interne de la butée manoeuvrable de l'extérieur sur laquelle il vient buter par son extrémité pointeau, le débit laissé à l'air d'échappement traversant l'appareil, et donc la vitesse du vérin, dépend ainsi du réglage de cette vis.The signal in the third chamber has the effect of moving the piston in the direction of the seat, and this stroke being limited by the internal end of the maneuverable stop from the outside on which it abuts by its needle end, the flow rate left at the exhaust air passing through the device, and therefore the speed of the jack, thus depends on the setting of this screw.

Dans cette version simplifiée de l'appareil, en l'absence de signal de pilotage, la pression traversant le régleur dans un sens ou dans l'autre repousse le piston en pleine ouverture du siège et un tel appareil ne permet qu'une seule vitesse réglée introduite par un signal de pilotage. Dans les versions préférentielles d'application de l'invention, la course du piston en ouverture du siège peut également être limitée par une seconde vis de réglage opposée à la première, sur laquelle il vient buter par son extrémité opposée au pointeau: cette seconde vis réglant une vitesse de vérin toujours plus élevée que celle réglée par la première qui détermine le passage à travers le siège en présence d'un signal de pilotage. Pour permettre alors le plein débit d'admission vers le vérin dans sa course inverse, débit traversant le régleur en sens contraire à celui des débits d'échappement contrôlés, un clapet de retour est disposé en dérivation du siège pour s'ouvrir dans le sens de l'admission d'air vers le vérin et se fermer dans le sens du débit de purge en provenant.In this simplified version of the device, in the absence of a pilot signal, the pressure passing through the adjuster in one direction or the other pushes the piston when the seat is fully open and such an device allows only one speed set entered by a control signal. In versions application of the invention, the stroke of the piston in opening the seat can also be limited by a second adjusting screw opposite the first, on which it abuts by its end opposite the needle: this second screw regulating a speed cylinder always higher than that set by the first which determines the passage through the seat in the presence of a piloting signal. To then allow full admission flow to the cylinder in its reverse stroke, flow passing through the regulator in the opposite direction to that of the controlled exhaust flows, a return valve is arranged in bypass of the seat to open in the direction from the air intake to the cylinder and close in the direction of the purge flow from it.

D'autres caractéristiques et avantages de l'invention seront mieux compris à la lecture de la description qui va suivre de plusieurs modes de réalisation préférentielle et en se référant aux dessins annexés dans lesquels:

  • la figure 1 est une vue en coupe d'un raccord-régleur piloté selon l'invention, et de son montage permettant d'obtenir deux vitesses différentes de la sortie de tige d'un vérin, et
  • les figures 2 à 4 sont des vues en coupe similaires de trois autres exemples de réalisation de raccord-régleur selon l'invention.
Other characteristics and advantages of the invention will be better understood on reading the description which follows of several preferred embodiments and with reference to the appended drawings in which:
  • FIG. 1 is a sectional view of a pilot-operated fitting-regulator according to the invention, and of its assembly making it possible to obtain two different speeds from the rod outlet of a jack, and
  • Figures 2 to 4 are similar sectional views of three other embodiments of connector-adjuster according to the invention.

Suivant la figure 1, le régleur piloté comporte dans un corps 1, un piston 2 glissant dans un logement cylindrique de façon étanche par un joint 3, et dont une extrémité forme un pointeau 15 coopérant avec un siège 16 pour contrôler un débit de fluide venant d'une première chambre 4 vers une seconde chambre 5. La première chambre 4 est délimitée par le siège 16, un clapet unidirectionnel annulaire 14 établi en dérivation dudit siège, le joint 8 d'une vis de réglage 7, et par un orifice de raccordement 11. La seconde chambre 5 est délimitée par le siège 16, le clapet 14, le joint 3 du piston 2 et un orifice raccordable 12. Le clapet 14 est orienté de façon à se fermer au débit de fluide s'écoulant de la chambre 4 vers la chambre 5 et à s'ouvrir en sens inverse. Le régleur comporte également une troisième chambre 6 délimitée par le joint 3 du piston 2, un bouchon la fermant le logement dudit piston, le joint 10 d'une vis de réglage 9 dans le bouchon la et un orifice raccordable 13.According to Figure 1, the piloted adjuster comprises in a body 1, a piston 2 sliding in a cylindrical housing in a sealed manner by a seal 3, and one end of which forms a needle 15 cooperating with a seat 16 to control a flow of fluid coming from a first chamber 4 to a second chamber 5. The first chamber 4 is delimited by the seat 16, an annular unidirectional valve 14 established in derivation of said seat, the joint 8 of an adjustment screw 7, and by a orifice connection 11. The second chamber 5 is delimited by the seat 16, the valve 14, the seal 3 of the piston 2 and a connectable orifice 12. The valve 14 is oriented so as to close at the flow of fluid flowing from chamber 4 to chamber 5 and opening in the opposite direction. The adjuster also comprises a third chamber 6 delimited by the seal 3 of the piston 2, a plug closing the housing of said piston, the seal 10 of an adjustment screw 9 in the plug 1a and a connectable orifice 13.

Tel que représenté suivant la figure 1, le régleur piloté règle la petite vitesse de sortie de tige d'un vérin 30, par l'effet d'un signal de pilotage, émis par un capteur 50. L'air en provenance de la chambre du vérin en purge, côté tige, s'écoule dans le régleur de son orifice 11 à son orifice 12, ferme le clapet 14 à son propre passage qui ne peut se faire qu'à travers le siège 16 avec un débit fonction de la position du pointeau 15. La chambre 6 étant sous pression, le piston 2 est poussé en butée sur l'extrémité interne 7a de la vis 7 qui traverse le siège 16 pour pénétrer dans un canal axial borgne du piston 2 et en améliorer le guidage. En présence du signal de pilotage, la vitesse du vérin 30 est donc réglée par la vis 7. En l'absence de ce signal, le piston 2 est maintenu en position d'ouverture du siège 16 par l'effet de la pression traversant l'appareil dans la chambre 5. Le passage laissé au débit d'échappement à travers le siège 16 est alors fonction du réglage de la vis 9 sur l'extrémité interne de laquelle vient buter le piston 2 par sa face opposée au pointeau 15. La vis 9 règle donc une vitesse de vérin toujours supérieure à celle réglée par la vis 7. Le vérin effectuant sa course inverse, l'air d'admission traversant le régleur de l'orifice 12 à l'orifice 11 ouvre le clapet 14 et le plein débit est ainsi assuré, que le signal de pilotage soit présent ou non à l'orifice 13 et indépendamment du réglage des vis 7 et 9. Le capteur 50 peut être manoeuvré soit manuellement, soit par la tige du vérin 30 lui-même, ou celle d'un autre vérin. Le signal peut également provenir de diverses sources, comme un temporisateur, le départ d'un autre vérin, séquenceur, etc. Il peut n'être émis que pour certaines séquences de fonctionnement du vérin dans le cycle.As shown in FIG. 1, the piloted regulator regulates the low rod exit speed of a jack 30, by the effect of a piloting signal, emitted by a sensor 50. The air coming from the chamber purge cylinder, rod side, flows into the adjuster from its orifice 11 to its orifice 12, closes the valve 14 at its own passage which can only be done through the seat 16 with a flow rate depending on the position of the needle 15. The chamber 6 being under pressure, the piston 2 is pushed into abutment on the internal end 7a of the screw 7 which passes through the seat 16 in order to penetrate into a blind axial channel of the piston 2 and to improve its guidance. In the presence of the piloting signal, the speed of the jack 30 is therefore adjusted by the screw 7. In the absence of this signal, the piston 2 is held in the open position of the seat 16 by the effect of the pressure passing through l device in the chamber 5. The passage left to the exhaust flow through the seat 16 is then a function of the adjustment of the screw 9 on the internal end of which abuts the piston 2 by its face opposite the needle 15. The screw 9 therefore sets a jack speed always higher than that set by screw 7. The jack making its reverse stroke, the intake air passing through the adjuster from port 12 to port 11 opens the valve 14 and the full flow is thus ensured, whether the piloting signal is present or not at the orifice 13 and independently of the adjustment of the screws 7 and 9. The sensor 50 can be operated either manually or by the rod of the jack 30 itself, or that of another cylinder. The signal can also come from various sources, such as a timer, the start of another cylinder, sequencer, etc. It can only be issued for certain cylinder operating sequences in the cycle.

La figure 2 est la représentation en coupe d'une autre réalisation de l'invention qui se différencie essentiellement de la réalisation précédemment décrite suivant la figure 1, par son piston 2 qui comporte deux sections différentes définies par les joints 3 et 3a qu'il porte. Le joint 3a de plus grand diamètre que celui du joint 3 est soumis à la pression du signal dans la chambre 6; cette disposition permettant un signal de pilotage de pression éventuellement faible.Figure 2 is the sectional representation of another embodiment of the invention which differs essentially from the embodiment previously described according to Figure 1, by its piston 2 which has two different sections defined by the seals 3 and 3a that door. The seal 3a of larger diameter than that of the seal 3 is subjected to the pressure of the signal in the chamber 6; this arrangement allowing a possibly low pressure control signal.

La figure 3 est la représentation en coupe d'une autre réalisation de l'invention qui, comme la réalisation précédemment décrite suivant la figure 2, comporte un piston étagé 2 susceptible de se déplacer sous l'effet d'une faible pression de pilotage. Suivant la figure 3, le pointeau 15 du piston 2 se prolonge par une tige 2a de faible diamètre qui traverse le siège 16 et comporte à son extrémité une section de piston définie par son joint 3b plus faible que celle du siège et que celle de la grande section du piston définie par le joint 3. La pression traversant l'appareil agit sur le piston 2 dans le sens de l'ouverture du siège 16 avec une force résultant de la différence des sections 3-3b, tandis que la pression antagoniste du signal agit sur la pleine section 3. Suivant cette disposition également, la vis de réglage 7 de la petite vitesse sur l'extrémité interne de laquelle vient buter le piston 2 par sa petite section, ne comporte aucun joint.Figure 3 is the sectional representation of another embodiment of the invention which, like the embodiment previously described according to Figure 2, comprises a stepped piston 2 capable of moving under the effect of a low pilot pressure. According to Figure 3, the needle 15 of the piston 2 is extended by a rod 2a of small diameter which passes through the seat 16 and has at its end a piston section defined by its seal 3b weaker than that of the seat and that of the large section of the piston defined by the gasket 3. The pressure passing through the device acts on the piston 2 in the direction of the opening of the seat 16 with a force resulting from the difference in sections 3-3b, while the opposing pressure of the signal acts on the full section 3. According to this arrangement also, the adjusting screw 7 of the low speed on the internal end of which abuts the piston 2 by its small section, has no seal.

La figure 4 est la représentation en coupe d'une autre réalisation d'un raccord-régleur piloté à deux vitesses conforme à l'invention. Suivant la figure 4, et à l'inverse de la disposition retenue dans les réalisations décrites suivant les figures 1, 2 et 3, la disposition du piston 2 est ici telle qu'il tend à la fermeture du siège 16 dans le sens du débit de l'air d'échappement, c'est-à-dire de la chambre 4 à la chambre 5: cette disposition est plus spécialement applicable dans des appareils de faible encombrement.FIG. 4 is a sectional representation of another embodiment of a two-speed pilot-operated fitting-regulator according to the invention. According to Figure 4, and unlike the arrangement used in the embodiments described according to Figures 1, 2 and 3, the arrangement of the piston 2 is here such that it tends to close the seat 16 in the direction of flow. exhaust air, that is to say from chamber 4 to chamber 5: this arrangement is more particularly applicable in devices of small bulk.

Suivant les figures 1, 2, 3 et 4, la vis de réglage 7 de la petite vitesse comporte un pas de vis à gauche et la vis de réglage 9 de la grande vitesse, un pas de vis à droite.According to Figures 1, 2, 3 and 4, the adjusting screw 7 of the low speed has a screw thread on the left and the adjusting screw 9 for high speed, a screw thread on the right.

Suivant les figures 1, 2, 3 et 4, les orifices 11, 12 et 13 sont équipés de cartouches de raccordement instantané 11a, 12a, 13a.According to Figures 1, 2, 3 and 4, the orifices 11, 12 and 13 are equipped with instantaneous connection cartridges 11a, 12a, 13a.

Claims (7)

  1. A pilot-operated regulating connector for the speed regulator of pneumatic piston and cylinder units to be arranged between a piston and cylinder unit (30) and the dictributor valve (40) thereof, which regulating connector comprises a regulation element (2) adapted for axial displacement in a cylindrical recess in a body (1), and of which one end constitutes a needle valve member in cooperation with a seat (16) thereof in order to control the passage of the fluid from a first chamber (4) delimited by an orifice (11) adapted to be connected with the piston and cylinder unit (30) and said seat to a second chamber (5) delimited by said seat (16) and an orifice (12) adapted to be connected with the distributor valve (40);
       and is characterized in that the regulation element (2) is a piston comprising at least one seal (3) providing for sliding with a sealing action, and which delimits a third chamber (6) with an orifice (13) for connection with pipe means for the supply of a pressure signal acting on the face of the piston (2) opposite to the needle valve member (15) and entraining the same into the shut condition of the seat (16), the course of the piston (2) for shutting the seat (16) being set by an abutment (7) whose position may be adjusted from the outside and on which it comes to abut at its end on the needle valve member side (15).
  2. The pilot-operated regulating connector as claimed in claim 1, characterized in that the abutment limiting the course of the piston (2) for shutting the seat (16) is constituted by a screw (7) which is coaxial to the piston, is screwed into the body (1) in a sealing manner using a toroidal seal (8), is prolonged by a rod (7a) towards the needle valve member (15) and on the free end of which the piston (2) abuts during a closing movement thereof.
  3. The pilot-operated regulating connector as claimed in claim 1 and claim 2, characterized in that the piston (2) is a stepped piston presenting two different cross sections each fitted with toroidal seal, the small cross section defined by the seal (3) on the needle valve member side (15) being subjected to the pressure passing through the device from one of the orifices (11) to the other one (12), and the largest cross section defined by the seal (3a) at the pressure level of the master signal in the chamber (6).
  4. The pilot-operated regulating connector as claimed in claim 1, characterized in that the needle valve member (15) of the piston (2) is extend past the seat (16) by a rod (2a) with a small diameter and joined at its end with a part with a cross section smaller than that of the seat (16) and that of the part with a cross section fitted with the seal (3), said small cross section, subjected to the pressure in the chamber (4), sliding in a sealing manner on a toroidal seal (3b) in a cylindrical recess in the body (1) of the device, and the course of the piston (2) for closing the seat (16) by means of the needle valve member (15) being delimited by the abutment of the said part with the cross section (3b) on the internal end of a regulation screw (7) in the prolongation of the cylindrical recess thereof.
  5. The pilot-operated regulating connector as claimed in any one of the preceding claims 1, 2, 3 and 4, characterized in that the course of the piston (2) in the direction to close the seat (16) is set by the position of the internal end of the chamber (6), of a screw (3) able to be adjusted from the outside and screwing a sealing manner in a toroidal seal (10) in a plug (1a) fixed to the body (1) of the device, said piston (2) moving so that its end, which is opposite to the needle valve member (15), abuts against the internal end of the screw (9) owing to the effect of the pressure in the chamber (5) and the absence of pressure in the chamber (6), the same device comprising a unidirectional valve (14) in a bypass from the seat (16), opening on the passage of the fluid from the orifice (12) to the orifice (11) and closing in the opposite direction.
  6. The pilot-operated regulating connector as claimed in any one of the preceding claims 2, 4 and 5, characterized in that the screw (7) for the regulation of the course of the piston (2) for closing the seat (16) comprises left had screw thread.
  7. The pilot-operated regulating connector as claimed in claim 1, characterized in that the orifices (11,12 and 13) for the connection by the intermediary of pipe means are fitted with instant connection sleeves (11a, 12a and 13a).
EP89460027A 1988-09-16 1989-09-13 Pilot-operated regulating connector for regulating the speed of pneumatic actuators Expired - Lifetime EP0360718B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812409 1988-09-16
FR8812409A FR2637326B1 (en) 1988-09-16 1988-09-16 PILOT ADJUSTER-ADJUSTER FOR SPEED ADJUSTMENT OF PNEUMATIC CYLINDERS

Publications (2)

Publication Number Publication Date
EP0360718A1 EP0360718A1 (en) 1990-03-28
EP0360718B1 true EP0360718B1 (en) 1992-12-23

Family

ID=9370280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89460027A Expired - Lifetime EP0360718B1 (en) 1988-09-16 1989-09-13 Pilot-operated regulating connector for regulating the speed of pneumatic actuators

Country Status (7)

Country Link
US (1) US5097747A (en)
EP (1) EP0360718B1 (en)
JP (1) JPH03501996A (en)
DE (1) DE68904028T2 (en)
ES (1) ES2036366T3 (en)
FR (1) FR2637326B1 (en)
WO (1) WO1990002883A1 (en)

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JP3778634B2 (en) 1996-11-22 2006-05-24 Ｓｍｃ株式会社 Speed controller with pilot check valve
DE102004061630C5 (en) * 2004-12-17 2015-12-24 Dorma Deutschland Gmbh Door drive, in particular swing door drive
GB2483507A (en) * 2010-09-11 2012-03-14 Bifold Fluidpower Ltd Flow control device
GB201113017D0 (en) * 2011-07-28 2011-09-14 Ge Healthcare Bio Sciences Ab Improvements in and relating to fluid sample holders
US10927858B2 (en) 2016-06-22 2021-02-23 Aladdin Engineering And Manufacturing, Inc. Valve system for pneumatic cylinders
US10480542B2 (en) 2016-06-22 2019-11-19 Aladdin Engineering And Manufacturing, Inc. Valve system for pneumatic cylinders
US9903487B2 (en) * 2016-06-22 2018-02-27 Aladdin Engineering And Manufacturing, Inc. Valve system for pneumatic cylinders
CN109883639B (en) * 2019-03-25 2020-06-26 浙江大学宁波理工学院 Three-degree-of-freedom electro-hydraulic control type micro-excitation system
CN114578091B (en) * 2022-05-06 2022-08-23 河南氢枫能源技术有限公司 Hydrogenation flow regulation detection device

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FR2343280A1 (en) * 1976-03-05 1977-09-30 Bouteille Daniel Unidirectional flow restrictor for fluid pipe - has two channels connected by third channel with non return valve
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US4073311A (en) * 1976-12-10 1978-02-14 Numatics, Incorporated Flow control valve
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US4601366A (en) * 1983-04-22 1986-07-22 Blain Roy W Down valve for the down speed control of a hydraulic elevator

Also Published As

Publication number Publication date
FR2637326A1 (en) 1990-04-06
DE68904028T2 (en) 1993-05-06
US5097747A (en) 1992-03-24
JPH03501996A (en) 1991-05-09
DE68904028D1 (en) 1993-02-04
ES2036366T3 (en) 1993-05-16
EP0360718A1 (en) 1990-03-28
FR2637326B1 (en) 1992-10-16
WO1990002883A1 (en) 1990-03-22

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