EP0144337B1 - Automatic compressed air saving device - Google Patents

Automatic compressed air saving device Download PDF

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Publication number
EP0144337B1
EP0144337B1 EP84901374A EP84901374A EP0144337B1 EP 0144337 B1 EP0144337 B1 EP 0144337B1 EP 84901374 A EP84901374 A EP 84901374A EP 84901374 A EP84901374 A EP 84901374A EP 0144337 B1 EP0144337 B1 EP 0144337B1
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EP
European Patent Office
Prior art keywords
piston
valve
fluid
conduit
chamber
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
Application number
EP84901374A
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German (de)
French (fr)
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EP0144337A1 (en
Inventor
André Legris
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Legris SA
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Legris SA
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Publication date
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Publication of EP0144337A1 publication Critical patent/EP0144337A1/en
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Expired legal-status Critical Current

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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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/064—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam with devices for saving the compressible medium
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves

Definitions

  • the present invention relates to an automatic compressed air saver device.
  • European patent application EP-A-89881 (state of the art as defined in Article 54 (3) EPC) relates to a compressed air saving device making it possible to regulate a pressure lower than that during the duration of the pressure relief valve of the motor of an appliance user in particular of a jack.
  • This document describes a device comprising a means ensuring the passage of the working fluid under pressure during most of the stroke of the movable member of the jack and closing said passage of pressurized fluid before or at the end of the stroke of said movable member.
  • the patent GB-A-2,074,701 also describes a compressed air saving device operating on the principle of a valve opening dependent on the characteristics of a spring which can be adjusted on demand.
  • the present invention relates to an improved economizer device of this type mounted in a simple connector intended to equip a single chamber with a double-acting cylinder.
  • the automatic compressed air saving device consists of a simple connector body comprising a cylindrical part on which is mounted a bushing comprising a fluid supply pipe, this pipe extending perpendicular to the 'axis of the body, the latter containing a valve capable of closing or freeing the passage of the supply fluid, connected by a rod to a piston subjected to the action of an elastic member; said device is intended to be interposed on the one hand between one of the chambers of an actuator and a power distributor of the actuator, this via a conduit connected to the tubing; on the other hand between the other chamber of the jack and the body via another conduit and a tube leading to a chamber of the body situated above the piston and also being connected to a conduit, itself directly connected to the distributor of such so that when the piston of the jack delimiting the two chambers moves in one direction, the fluid escaping by the conduit connecting the other chamber of the jack to the distributor, transform its pressure called exhaust pressure by the other conduit in the chamber of the body, exhaust pressure which acts on a
  • This device makes it possible to stop the supply of fluid to the jack before or at the end of the piston stroke and to adjust the speed of this piston, according to the work to be performed.
  • the control of the valve is obtained either by the drop in pressure of the exhaust fluid or by a pressure signal emitted by a limit switch of the jack.
  • Figure 1 there is shown a cylinder 1 in which is slidably mounted a piston 2 having a rod 3 actuating any member not shown in the drawing.
  • a compressed air saving device 4 mounted between one of the chambers 1a of the jack and a distributor 5 selectively connecting the chamber 1a to a source of compressed air and to the at mosphere, the other chamber 1 of the jack being connected directly by a conduit 6 to the distributor 5, but it would obviously be possible to mount on the conduit 6 an economizer device identical to the economizer device 4.
  • the economizer device 4 comprises a body 7 of tubular shape having at its lower part a threaded part 8 for its mounting in a tapped hole of a support member and a cylindrical part on which is rotatably mounted a bushing 9 comprising a tubing 10 of outlet of the fluid towards a conduit 11 and the chamber 1a of the jack, said tube 10 extending perpendicular to the axis of the body 7.
  • the body 7 contains a valve 12 which is connected by a rod 14 to a piston 13 and which is capable of closing the passage between the conduit 15 and the conduit of the tube 10, coming to bear against a seat 16 formed in the body 7. Above the seat 16, a tubular space is in communication through orifices 17 with a conduit 18 formed in the tubing 10 and opening into the conduit 11.
  • the conduit 18 has orifices 19 which are closed outside of said conduit by a deformable sleeve 20 fixed at one of its ends and the other end of which is free to open to allow the fluid coming from the conduits to pass 11 and 18 towards a tubular part 21 which opens into the conduit 15 and short-circuits the seat 16 of the valve 12.
  • This sleeve 20 constitutes a one-way valve allowing the passage of the fluid only in the direction of the chamber 1a towards the distripter 5 .
  • a threaded part into which is screwed a plug 22 which has in its central part a housing 24 in which is mounted a spring 23 bearing against the face of large cross section of the piston 13, so as to adjust the pressure of the spring 23 on the piston and on the valve 12 to adjust the flow rate of the fluid and the speed of the piston 2.
  • the housing 24 extends to the upper part of the plug 22 and opens out through orifices 25 in a tube 26 which is integral with a socket 27 engaged on the upper external part of the plug 22 and which extends perpendicular to the axis of the body 7.
  • the tubing 26 is connected by a conduit 28 for taking the pressure to the conduit 6 for the exhaust fluid coming from the chamber 1b of the jack 1.
  • the fluid can escape to the annular space 21 and the conduit 15 to the distributor 5. via the one-way valve 20, which increases the flow rate at the exhaust.
  • the plug 22 is acted on which can be more or less screwed, in order to modify the tension on the spring 23 and the orifice for passage of the fluid between the seat 16 and the valve 12.
  • FIG 2 there is shown an economizer device identical to that of Figure 1, however in this embodiment a valve is used which alone ensures the passage of fluid to the intake and exhaust.
  • valve 30 has a rod 31 which is slidably mounted in a blind hole 32 formed in the lower part of the piston 13, this valve 30 being subjected to the action of a spring 33 acting in the closing direction. valve 30.
  • Tubing 10 has only one conduit 18 and the unidirectional valve 20 has been removed.
  • the chamber 1a of the jack is supplied with working fluid, the exhaust fluid flowing from the chamber 1b of the jack, the piston 13 is held in the low position under the combined action of the spring 23 and the pressure of the fluid d 'exhaust coming from the duct 28, so that the valve 30 remains in the open position allowing passage of the working fluid towards the duct 11.
  • the speed of the piston 2 is adjusted in the same way as above by acting on the plug 22 and compressing the spring 23 more or less so as to allow a greater or lesser passage between the valve 30 and its seat 16.
  • FIG. 3 there is shown an economizer device which is similar to that of Figure 1, however the plug 22 is fixed and is not a means of adjusting the tension of the spring 23 as in FIG. 1 in order to control the orifice for the passage of the fluid and the speed of movement of the piston 2 in the jack.
  • the device comprises a main body 7 which has at its base a threaded part 34 engaged in a tapped hole of a secondary body made up of two inlet pipes 35 and outlet 36 for the fluid which are arranged in extension of one another along the same axis perpendicular to the axis of the main body 7.
  • the control means of the valve 30 is identical to that having the object of the embodiment of FIG. 2.
  • the economizer device shown in Figure 5 is identical to that of Figure 3, but it comprises as before a secondary body consisting of two tubes 35, 36 arranged in the extension of one another along the same axis.
  • the control means of the valve 12 and the unidirectional valve 20 are identical to those forming the subject of FIG. 3 which do not include any means for adjusting the tension of the spring 23.
  • an economizer device comprising a body 37 which has a flat face 38 by which it is fixed to a corresponding face of an apparatus including a distributor 39 whose orifices 40, 40a, 40b are located opposite the supply and exhaust ports of the economizer.
  • the valve 30 is controlled by a piston 13 in the same manner as described above with regard to the device in FIG. 2.
  • Figure 7 there is shown a device identical to that of Figure 6 but sandwiched between two devices 41 and 42.
  • the body 37 of the device has two plane faces 37a, 37b which are in contact with corresponding faces of the two devices.
  • Ports 43a, b, c of the devices provide direct communication with the orifices of the body 37 of the economizer device.
  • FIG. 8 shows an economizer device in which the body 7 contains a piston 44 which has a blind hole 32 in which the rod 31 of the valve 30 is slidably mounted.
  • the body 7 is closed by a plug 45 against which is supported by one of its ends a spring 46 which acts by its other end on the piston 44.
  • a plug 45 against which is supported by one of its ends a spring 46 which acts by its other end on the piston 44.
  • a tapped hole in which is engaged a screw comprising at one of its ends a pin 48 bearing against members 49 integral with the piston 44.
  • This arrangement makes it possible to more or less compress the spring 46 by acting on the screw 47 and on the piston 44 to adjust the air flow and consequently the speed of the piston 2 of the jack.
  • the tube 10 is mounted on the body 7 by its sleeve 27 a tube 26 connected by the conduit 28 to the exhaust of the chamber 1b of the jack.
  • the tubing 26 has an inclined conduit 50 which opens into an annular space 51 in communication through an orifice 52 of the body 7 and a conduit 53 formed in the central part of the piston 44 with a chamber 54 disposed above the piston 44.
  • the part of the chamber 54 located under the piston is connected to the atmosphere by a conduit 55 in the body 7, an annular space 56 separated from the annular space 51 by an O-ring 57, and an orifice 58 formed in the socket. 27.
  • FIG. 9 there is shown a device in which a piston 59 is connected to a valve 60 by a rod 61, said valve being held in its seat in the closed position by a spring 62 disposed in a housing 63 of a plug 64 engaged in the body 7 and having a threaded part 65 which is engaged in a corresponding tapped hole of a ring 66 mounted rotatably and captive by a rib 67 engaged in a groove on the body 7.
  • This arrangement allows by acting by rotation on the ring 66 to move the plug 64 axially and more or less compress the spring 62 to adjust the fluid flow and the speed of the piston of the jack.
  • a unidirectional ball valve 68 making it possible to vent the space located above the valve 60.
  • valve 60 When the chamber 1a of the jack 1 (FIG. 1) is supplied with fluid, the valve 60 is in the open position, the piston 59 being raised against the action of the spring 62 by the pressure of the escaping fluid from chamber 1 of the jack which enters chamber 69 via the tubing 26.
  • the unidirectional valve 20 makes it possible to short-circuit the valve 60 to allow the passage of the fluid in the opposite direction when the chamber 1 a of the jack is in the exhaust phase.
  • the device shown in Figure 10 is similar to that of Figure 9 except for the body 70 which is in one piece and has two pipes 71, 72 which are located in the extension of one another along the same axis for mounting on a conduit.
  • connection with the fluid exhaust duct is carried out by means of a duct 73 opening into the chamber 69 of the body 70.
  • FIG. 11 another embodiment of an economizer device is shown, the valve of which is controlled on closing by a pressure signal emitted by an end-of-stroke detector of the piston 2 of the jack 1 or any other means emitting a pressure signal.
  • This device comprises a plug 22 having a threaded portion 74 by which it is screwed into the body 7 on which is mounted at right angles by means of a socket 9 a tube 10 containing a one-way valve 20.
  • the plug 22 has a housing 75 in which a piston 76 is slidably mounted subjected to the action of a spring 77 and having one of its ends a shutter member 78 constituting the valve bearing against a seat 79 formed in the body between the conduits 15 and 18.
  • conduit 80 connected to a means emitting a pressure signal, in particular at the end of the stroke of the jack piston.
  • FIG 12 there is shown an economizer device whose valve is also controlled by a pressure signal.
  • a piston 81 secured to a valve 82 held in the open position by a spring 83.
  • a plug 84 having a threaded part 85 by which it is engaged in a tapped hole of an adjustment ring 86 having a circular rib 87 engaged in a groove of the body 7, said ring being thus kept rotating on the body 7.
  • the plug 84 has a conduit 88 through which a pressure signal can be transmitted to the piston 81 to effect the closing of the valve 82 against the action of the spring 83 at a determined time, notably during the end position of cylinder stroke.
  • FIG. 13 shows a device identical to that of FIG. 12, however, this does not include a spring 83, owing to the fact that the chamber 89 is connected to the atmosphere by a conduit 90.
  • FIG. 14 shows a device similar to that of FIG. 12 but in which the input of the pressure signal takes place laterally.
  • the device comprises above the tubing 10 another tubing 91 which comprises a sleeve 92 engaged on the body 7 and comprising seals 92a 92b so as to isolate an annular space between the body 7 and the sleeve 92, said annular space connecting the conduit 93 through an orifice 94 to a chamber 95 located above the piston 81.
  • the pressurized fluid corresponding to a signal can therefore propagate from the conduit 93 to the chamber 95 where it acts on the piston 81 against the action of the spring 83 and ensures the closing of the valve 82 normally open.
  • the device represented in FIG. 15 is identical to that of FIG. 14 except with regard to the arrangement of the body 96 which comprises two tubes 96a, 96b situated along a same axis in the extension of one another, said tubes ensuring in one direction the passage of the fluid through the valve 82 or in the other direction by means of the one-way valve 20.
  • FIG 16 The device shown in Figure 16 is identical to that of Figure 8, however it is used in the case of a piston operating under the action of a pressure signal.
  • the sleeve 27 is turned over so that the inclined conduit 50 opens into the annular space 56 and through the orifice 55 in the chamber 54a located under the piston 44. Furthermore, the space 51 being connected to the atmosphere through the orifice 58 of the socket 27, it is thus possible to connect the space 54 to the atmosphere through the conduit 53 which opens into the annular space 51.

Abstract

Automatic compressed air saving device comprising a means providing for the passage of the pressure working fluid during the majorpart of the stroke of a moving member of a user apparatus. It is comprised of a simple connection body (7) having a first circuit connecting a fluid supply conduit to a chamber (1a) of the jack (1), said first circuit being controlled by a valve (12, 30) integral with a piston (13) subjected to the action of an elastic member (23) and slidingly mounted within said body, the piston (13) being actuated by the presence or absence of a pressure signal, said body (7) having a second circuit short circuiting the first circuit and connecting a fluid discharge conduit to said chamber (1a) of the jack (1). The invention is used to save compressed air.

Description

La présente invention a pour objet un dispositif économiseur automatique d'air comprimé.The present invention relates to an automatic compressed air saver device.

La demande de brevet européen EP-A-89881 (état de la technique tel que définie à l'article 54 (3) CBE) concerne un dispositif économiseur d'air comprimé permettant de régler une pression inférieure à celleduréseaudistributeurlapressiondufluidemoteur d'unappareilutilisateurnotammentd'unvérin.European patent application EP-A-89881 (state of the art as defined in Article 54 (3) EPC) relates to a compressed air saving device making it possible to regulate a pressure lower than that during the duration of the pressure relief valve of the motor of an appliance user in particular of a jack.

Ce document décrit un dispositif comportant un moyen assurant le passage du fluide moteur sous pression pendant la plus grande partie de la course de l'organe mobile du vérin et obturant le dit passage de fluide sous pression avant ou en fin de course du dit organe mobile.This document describes a device comprising a means ensuring the passage of the working fluid under pressure during most of the stroke of the movable member of the jack and closing said passage of pressurized fluid before or at the end of the stroke of said movable member. .

Il décrit également un tel dispositif économiseur réalisé sous la forme d'un raccord simple qui peut être monté facilement sur un vérin, sur une canalisation ou sur un distributeur et qui peut être réalisé avec des moyens très simples et peu coûteux.It also describes such an economizer device produced in the form of a simple connector which can be easily mounted on a jack, on a pipe or on a distributor and which can be produced with very simple and inexpensive means.

Le brevet GB-A-2.074.701 décrit aussi un dispositif économiseur d'air comprimé fonctionnant sur le principe d'une ouverture de soupape dépendant des caractéristiques d'un ressort que l'on peut régler à la demande.The patent GB-A-2,074,701 also describes a compressed air saving device operating on the principle of a valve opening dependent on the characteristics of a spring which can be adjusted on demand.

La présente invention a pour objet un dispositif économiseur perfectionné de ce type monté dans un raccord simple destiné à équiper une seule chambre d'un vérin à double effet.The present invention relates to an improved economizer device of this type mounted in a simple connector intended to equip a single chamber with a double-acting cylinder.

Conformément à la présente invention, le dispositif économiseur automatique d'air comprimé est constitué d'un corps de raccord simple comportant une partie cylindrique sur laquelle est montée une douille comportant une tubulure d'alimentation en fluide, cette tubulure s'étendant perpendiculairement à l'axe du corps, ce dernier renfermant une soupape capable d'obturer ou de libérer le passage du fluide d'alimentation, reliée par une tige à un piston soumis à l'action d'un organe élastique; le dit dispositif est destiné à être intercalé d'une part entre l'une des chambres d'un vérin et un distributeur d'alimentation du vérin, ceci via un conduit relié à la tubulure; d'autre part entre l'autre chambre du vérin et le corps via un autre conduit et une tubulure aboutissant dans une chambre du corps situé au-dessus du piston et étant également reliée à un conduit, lui-même directement relié au distributeur de telle sorte que lorsque le piston du vérin délimitant les deux chambres se déplace dans un sens, le fluide s'échappant par le conduit reliant l'autre chambre du vérin au distributeur, transment sa pression dite pression d'échappement par l'autre conduit dans la chambre du corps, pression d'échappement qui agit sur une grande face du piston mettant ainsi la soupape en position d'ouverture, jusqu'à ce que, en fin de course du vérin, la pression d'échappement disparaissant, la pression moteur reste la seule à être appliquée sur une petite face du piston différentiel provoquant ainsi la fermeture de la soupape; un clapet unidirectionnel étant prévu pour courcircuiter la soupape lorsque le piston du vérin se déplace dans le sens inverse et que la dite soupape se trouve alors en position ouverte sous l'action de l'organ élastique (23).According to the present invention, the automatic compressed air saving device consists of a simple connector body comprising a cylindrical part on which is mounted a bushing comprising a fluid supply pipe, this pipe extending perpendicular to the 'axis of the body, the latter containing a valve capable of closing or freeing the passage of the supply fluid, connected by a rod to a piston subjected to the action of an elastic member; said device is intended to be interposed on the one hand between one of the chambers of an actuator and a power distributor of the actuator, this via a conduit connected to the tubing; on the other hand between the other chamber of the jack and the body via another conduit and a tube leading to a chamber of the body situated above the piston and also being connected to a conduit, itself directly connected to the distributor of such so that when the piston of the jack delimiting the two chambers moves in one direction, the fluid escaping by the conduit connecting the other chamber of the jack to the distributor, transform its pressure called exhaust pressure by the other conduit in the chamber of the body, exhaust pressure which acts on a large face of the piston thus putting the valve in the open position, until, at the end of the cylinder stroke, the exhaust pressure disappears, the engine pressure remains the only one to be applied to a small face of the differential piston thus causing the valve to close; a one-way valve being provided for short-circuiting the valve when the piston of the jack moves in the opposite direction and when said valve is then in the open position under the action of the elastic member (23).

Ce dispositif permet d'arrêter l'alimentation en fluide du vérin avant ou en fin de course du piston et de régler la vitesse de ce piston, suivant le travail à effectuer.This device makes it possible to stop the supply of fluid to the jack before or at the end of the piston stroke and to adjust the speed of this piston, according to the work to be performed.

La commande du clapet est obtenue soit par la chute de pression du fluide d'échappement soit par un signal de pression émis par un détecteur de fin de course du vérin.The control of the valve is obtained either by the drop in pressure of the exhaust fluid or by a pressure signal emitted by a limit switch of the jack.

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 et en se référant aux dessins annexés, sur lesquels:

  • - la figure 1 est une vue en coupe longitudinale d'un dispositif économiseur à corps simple et à chute de pression relié à l'un des côtés d'un vérin;
  • - la figure 2 est une vue en coupe d'un dispositif économiseur identique à celui de la figure 1 et comportant un seul clapet fonctionnant dans les deux sens;
  • - la figure 3 est une vue en coupe d'une variante de réalisation du dispositif de la figure 1;
  • - la figure 4 est une vue en coupe d'un dispositif économiseur dans lequel les tubulures sont disposées suivant un même axe;
  • - la figure 5 est une vue en coupe d'une variante de réalisation du dispositif de la figure 4;
  • - la figure 6 est une vue en coupe d'un dispositif économiseur monté sur un appareil notamment un distributeur;
  • - la figure 7 est une vue en coupe d'un dispositif économiseur monté en sandwich entre deux appareils;
  • - la figure 8 est une vue en coupe d'un dispositif économiseur dans lequel le piston comporte un conduit pour le passage du fluide d'échappement;
  • - la figure 9 est une vue en coupe d'un dispositif économiseur comportant une soupape fermée actionnée par chute de pression;
  • - la figure 10 est une vue en coupe d'une variante de la figure 9;
  • - la figure 11 est une vue en coupe d'un dispositif économiseur à soupape fermée actionnée par un signal de pression;
  • - la figure 12 est une vue en coupe d'un dispositif économiseur à soupape fermée et actionnée par un signal de pression;
  • - la figure 13 est une vue en coupe d'une variante du dispositif représenté à la figure 12;
  • - la figure 14 est une vue en coupe d'un dispositif économiseur à clapet ouvert et actionné latéralement par un signal de pression;
  • - la figure 15 est une vue en coupe d'une variante de réalisation de la figure 14 dans laquelle les tubulures sont disposées suivant un même axe; et
  • - la figure 16 est une vue en coupe d'une variante de réalisation de la figure 8 actionnée par un signal de pression.
Other characteristics and advantages of the invention will be better understood on reading the following description of several embodiments and with reference to the appended drawings, in which:
  • - Figure 1 is a longitudinal sectional view of a simple body economizer and pressure drop connected to one side of a cylinder;
  • - Figure 2 is a sectional view of an economizer device identical to that of Figure 1 and comprising a single valve operating in both directions;
  • - Figure 3 is a sectional view of an alternative embodiment of the device of Figure 1;
  • - Figure 4 is a sectional view of an economizer device in which the tubes are arranged along the same axis;
  • - Figure 5 is a sectional view of an alternative embodiment of the device of Figure 4;
  • - Figure 6 is a sectional view of an economizer device mounted on a device including a distributor;
  • - Figure 7 is a sectional view of an economizer device sandwiched between two devices;
  • - Figure 8 is a sectional view of an economizer device in which the piston has a conduit for the passage of the exhaust fluid;
  • - Figure 9 is a sectional view of an economizer device comprising a closed valve actuated by pressure drop;
  • - Figure 10 is a sectional view of a variant of Figure 9;
  • - Figure 11 is a sectional view of a closed valve economizer device actuated by a pressure signal;
  • - Figure 12 is a sectional view of a closed valve economizer device and actuated by a pressure signal;
  • - Figure 13 is a sectional view of a variant of the device shown in Figure 12;
  • - Figure 14 is a sectional view of an economizer device with an open valve and actuated laterally by a pressure signal;
  • - Figure 15 is a sectional view of an alternative embodiment of Figure 14 in which the pipes are arranged along the same axis; and
  • - Figure 16 is a sectional view of an alternative embodiment of Figure 8 actuated by a pressure signal.

A la figure 1 on a représenté un vérin 1 dans lequel est monté coulissant un piston 2 comportant une tige 3 actionnant un organe quelconque non représenté au dessin. Un dispositif économiseur d'air comprimé 4 monté entre l'une des chambres 1a du vérin et un distributeur 5 reliant sélectivement la chambre 1a à une source d'air comprimé et à l'atmosphère, l'autre chambre 1 du vérin étant reliée directement par un conduit 6 au distributeur 5, mais il serait évidemment possible de monter sur le conduit 6 un dispositif économiseur identique au dispositif économiseur 4.In Figure 1 there is shown a cylinder 1 in which is slidably mounted a piston 2 having a rod 3 actuating any member not shown in the drawing. A compressed air saving device 4 mounted between one of the chambers 1a of the jack and a distributor 5 selectively connecting the chamber 1a to a source of compressed air and to the at mosphere, the other chamber 1 of the jack being connected directly by a conduit 6 to the distributor 5, but it would obviously be possible to mount on the conduit 6 an economizer device identical to the economizer device 4.

Le dispositif économiseur 4 comprend un corps 7 de forme tubulaire présentant à sa partie inférieure une partie filetée 8 pour son montage dans un trou taraudé d'un organe de support et une partie cylindrique sur laquelle est montée rotative un douille 9 comportant une tubulure 10 de sortie du fluide vers un conduit 11 et la chambre 1a du vérin, ladite tubulure 10 s'étendant perpendiculairement à l'axe du corps 7.The economizer device 4 comprises a body 7 of tubular shape having at its lower part a threaded part 8 for its mounting in a tapped hole of a support member and a cylindrical part on which is rotatably mounted a bushing 9 comprising a tubing 10 of outlet of the fluid towards a conduit 11 and the chamber 1a of the jack, said tube 10 extending perpendicular to the axis of the body 7.

Le corps 7 renferme une soupape 12 qui est reliée par une tige 14 à un piston 13 et qui est susceptible d'obturer le passage entre le conduit 15 et le conduit de la tubulure 10, en venant en appui contre un siège 16 ménagé dans le corps 7. Au-dessus du siège 16, un espace tubulaire est en communication par des orifices 17 avec un conduit 18 ménagé dans la tubulure 10 et débouchant dans le conduit 11.The body 7 contains a valve 12 which is connected by a rod 14 to a piston 13 and which is capable of closing the passage between the conduit 15 and the conduit of the tube 10, coming to bear against a seat 16 formed in the body 7. Above the seat 16, a tubular space is in communication through orifices 17 with a conduit 18 formed in the tubing 10 and opening into the conduit 11.

Le conduit 18 présente des orifices 19 qui sont obturés à l'extérieur dudit conduit par un manchon déformable 20 fixé à l'une de ses extrémités et dont l'autre extrémité est libre de s'ouvrir pour laisser passer le fluide en provenance des conduits 11 et 18 vers une partie tubulaire 21 qui débouche dans le conduit 15 et court-circuite le siège 16 de la soupape 12. Ce manchon 20 constitue un clapet unidirectionnel permettant le passage du fluide seulement dans le sens de la chambre 1a vers le distriputeur 5.The conduit 18 has orifices 19 which are closed outside of said conduit by a deformable sleeve 20 fixed at one of its ends and the other end of which is free to open to allow the fluid coming from the conduits to pass 11 and 18 towards a tubular part 21 which opens into the conduit 15 and short-circuits the seat 16 of the valve 12. This sleeve 20 constitutes a one-way valve allowing the passage of the fluid only in the direction of the chamber 1a towards the distripter 5 .

A la partie supérieure du corps 7 est prévu une partie filetée dans laquelle est vissé un bouchon 22 qui présente dans sa partie centrale un logement 24 dans lequel est monté un ressort 23 en appui contre la face de grande section du piston 13, de manière à régler la pression du ressort 23 sur le piston et sur le clapet 12 pour régler le débit du fluide et la vitesse du piston 2. Le logement 24 se prolonge à la partie supérieure du bouchon 22 et débouche par des orifices 25 dans une tubulure 26 qui est solidaire d'une douille 27 engagée sur la partie supérieure externe du bouchon 22 et qui s'étend perpendiculairement à l'axe du corps 7.At the upper part of the body 7 is provided a threaded part into which is screwed a plug 22 which has in its central part a housing 24 in which is mounted a spring 23 bearing against the face of large cross section of the piston 13, so as to adjust the pressure of the spring 23 on the piston and on the valve 12 to adjust the flow rate of the fluid and the speed of the piston 2. The housing 24 extends to the upper part of the plug 22 and opens out through orifices 25 in a tube 26 which is integral with a socket 27 engaged on the upper external part of the plug 22 and which extends perpendicular to the axis of the body 7.

La tubulure 26 est reliée par un conduit 28 de prise de pression au conduit 6 de fluide d'échappement en provenance de la chambre 1 b du vérin 1.The tubing 26 is connected by a conduit 28 for taking the pressure to the conduit 6 for the exhaust fluid coming from the chamber 1b of the jack 1.

Lorsque le piston 2 se déplace dans le sens de la flèche F comme représenté à la figure 1, le fluide s'échappant par le conduit 6 transmet sa pression par le conduit 28 dans la chambre 29 située au-dessus du piston 13, de telle sorte que sur sa grande face 13a le piston 13 est soumis à l'action combinée du ressort 23 et de la pression du fluide d'échappement en provenance de la chambre 1b du vérin. La petite face 13b du piston 13 est soumise à l'action de la pression du fluide d'admission ou fluide moteur, il en résulte que la soupape 12 est en position d'ouverture laissant passer le fluide moteur par le conduit 18 et le conduit 11 vers la chambre 1a.When the piston 2 moves in the direction of the arrow F as shown in Figure 1, the fluid escaping through the conduit 6 transmits its pressure through the conduit 28 in the chamber 29 located above the piston 13, such so that on its large face 13a the piston 13 is subjected to the combined action of the spring 23 and the pressure of the exhaust fluid from the chamber 1b of the jack. The small face 13b of the piston 13 is subjected to the action of the pressure of the intake fluid or working fluid, it follows that the valve 12 is in the open position letting the working fluid pass through the conduit 18 and the conduit 11 towards room 1a.

Par contre, dès que le piston 2 arrive en fin de course la pression du fluide d'échappement disparaît et elle n'agit plus sur la grande face 13a du piston 13, de telle sorte que la soupape 12 se referme sous l'action du fluide moteur agissant sur la petite face 13b du piston 13 dont l'effort est supérieur à celui du ressort 23.On the other hand, as soon as the piston 2 reaches the end of the stroke, the pressure of the exhaust fluid disappears and it no longer acts on the large face 13a of the piston 13, so that the valve 12 closes under the action of the working fluid acting on the small face 13b of the piston 13 whose force is greater than that of the spring 23.

Par contre, en l'absence de pression dans la chambre 17, le clapet 12 revient en position d'ouverture sous l'action du ressort 23.On the other hand, in the absence of pressure in the chamber 17, the valve 12 returns to the open position under the action of the spring 23.

Lorsque le piston 2 se déplace en sens inverse de la flèche F et que la chambre 1a est en position d'échappement, le fluide s'écoule par le conduit 11 vers le conduit 18 agissant sur la petite face 13b du piston 13, alors que la grande face 13a du piston est soumise à l'action du fluide moteur et du ressort qui maintiennent le clapet 12 en position d'ouverture.When the piston 2 moves in the opposite direction to the arrow F and the chamber 1a is in the exhaust position, the fluid flows through the conduit 11 towards the conduit 18 acting on the small face 13b of the piston 13, while the large face 13a of the piston is subjected to the action of the working fluid and of the spring which hold the valve 12 in the open position.

Par ailleurs, le fluide peut s'échapper vers l'espace annulaire 21 et le conduit 15 vers le distributeur 5. en passant par le clapet unidirectionnel 20, ce qui augmente le débit à l'échappement.Furthermore, the fluid can escape to the annular space 21 and the conduit 15 to the distributor 5. via the one-way valve 20, which increases the flow rate at the exhaust.

Pour faire varier la vitesse du piston 2 du vérin on agit sur le bouchon 22 qui peut être plus ou moins vissé, afin de modifier la tension sur le ressort 23 et l'orifice de passage du fluide entre le siège 16 et la soupape 12.To vary the speed of the piston 2 of the jack, the plug 22 is acted on which can be more or less screwed, in order to modify the tension on the spring 23 and the orifice for passage of the fluid between the seat 16 and the valve 12.

A la figure 2 on a représenté un dispositif économiseur identique à celui de la figure 1, toutefois dans ce mode de réalisation on utilise un clapet qui assure à lui seul le passage du fluide à l'admission et à l'échappement.In Figure 2 there is shown an economizer device identical to that of Figure 1, however in this embodiment a valve is used which alone ensures the passage of fluid to the intake and exhaust.

Dans ce but, le clapet 30 présente une tige 31 qui est montée coulissante dans un trou borgne 32 ménagé dans la partie inférieure du piston 13, ce clapet 30 étant soumis à l'action d'un ressort 33 agissant dans le sens de la fermeture du clapet 30.For this purpose, the valve 30 has a rod 31 which is slidably mounted in a blind hole 32 formed in the lower part of the piston 13, this valve 30 being subjected to the action of a spring 33 acting in the closing direction. valve 30.

La tubulure 10 ne comporte qu'un conduit 18 et le clapet unidirectionnel 20 a été supprimé. Lorsque la chambre 1a du vérin est alimentée en fluide moteur, le fluide d'échappement s'écoulant de la chambre 1b du vérin, le piston 13 est maintenu en position basse sous l'action combinée du ressort 23 et de la pression du fluide d'échappement provenant du conduit 28, de telle sorte que le clapet 30 reste en position ouverte laissant le passage au fluide moteur vers le conduit 11.Tubing 10 has only one conduit 18 and the unidirectional valve 20 has been removed. When the chamber 1a of the jack is supplied with working fluid, the exhaust fluid flowing from the chamber 1b of the jack, the piston 13 is held in the low position under the combined action of the spring 23 and the pressure of the fluid d 'exhaust coming from the duct 28, so that the valve 30 remains in the open position allowing passage of the working fluid towards the duct 11.

Dès que la pression du fluide d'échappement disparaît au-dessus de la grande face 13a du piston 13, le piston 13 se soulève sous l'action de la pression qui agit sur la petite face 13b du piston 13, permettant ainsi la fermeture du clapet 30 contre le siège 16 sous l'action du ressort 33.As soon as the pressure of the exhaust fluid disappears above the large face 13a of the piston 13, the piston 13 rises under the action of the pressure which acts on the small face 13b of the piston 13, thus allowing the closure of the valve 30 against the seat 16 under the action of the spring 33.

Par contre, lorsque le fluide d'échappement s'écoule en sens inverse du conduit 11 vers le conduit 15 le clapet 30 étant indépendant du piston 13, il en résulte que sous l'action de la pression du fluide le ressort 33 est comprimé permettant l'ouverture du clapet 30 et l'échappement du fluide vers le conduit 15.On the other hand, when the exhaust fluid flows in the opposite direction from the conduit 11 towards the conduit 15 the valve 30 being independent of the piston 13, it follows that under the action of the pressure of the fluid the spring 33 is compressed allowing the opening of the valve 30 and the escape of the fluid towards the conduit 15.

Le réglage de la vitesse du piston 2 s'effectue de la même manière que précédemment en agissant sur le bouchon 22 et en comprimant plus ou moins le ressort 23 afin de permettre un passage plus ou moins grand entre le clapet 30 et son siège 16.The speed of the piston 2 is adjusted in the same way as above by acting on the plug 22 and compressing the spring 23 more or less so as to allow a greater or lesser passage between the valve 30 and its seat 16.

A la figure 3 on a représenté un dispositif économiseur qui est analogue à celui de la figure 1, toutefois le bouchon 22 est fixe et en constitue pas un moyen de réglage de la tension du ressort 23 comme à la figure 1 en vue de contrôler l'orifice de passage du fluide et la vitesse de déplacement du piston 2 dans le vérin.In Figure 3 there is shown an economizer device which is similar to that of Figure 1, however the plug 22 is fixed and is not a means of adjusting the tension of the spring 23 as in FIG. 1 in order to control the orifice for the passage of the fluid and the speed of movement of the piston 2 in the jack.

Dans le mode de rélaisation de la figure 4, le dispositif comporte un corps principal 7 qui présente à sa base une partie filetée 34 engagée dans un trou taraudé d'un corps secondaire constitué de deux tubulures d'entrée 35 et de sortie 36 du fluide qui sont disposées dans prolongement l'une de l'autre suivant un même axe perpendicuaire à l'axe du corps principal 7.In the embodiment of FIG. 4, the device comprises a main body 7 which has at its base a threaded part 34 engaged in a tapped hole of a secondary body made up of two inlet pipes 35 and outlet 36 for the fluid which are arranged in extension of one another along the same axis perpendicular to the axis of the main body 7.

On obtient ainsi un passage direct du fluide du fait que le dispositif peut être monté sur un conduit 11, 11a relié d'une part au vérin et d'autre part au distributeur.This gives a direct passage of the fluid because the device can be mounted on a conduit 11, 11a connected on the one hand to the jack and on the other hand to the distributor.

Le moyen de commande du clapet 30 est identique à celui ayant l'objet du mode de réalisation de la figure 2.The control means of the valve 30 is identical to that having the object of the embodiment of FIG. 2.

Le dispositif économiseur représenté à la figure 5 est identique à celui de la figure 3, mais il comporte comme précédemment un corps secondaire constitué de deux tubulures 35, 36 disposées dans le prolongement l'une de l'autre suivant un même axe. Le moyen de commande de la soupape 12 et le clapet unidirectionnel 20 sont identiques à ceux faisant l'objet de la figure 3 qui ne comportent aucun moyen de réglage de la tension du ressort 23.The economizer device shown in Figure 5 is identical to that of Figure 3, but it comprises as before a secondary body consisting of two tubes 35, 36 arranged in the extension of one another along the same axis. The control means of the valve 12 and the unidirectional valve 20 are identical to those forming the subject of FIG. 3 which do not include any means for adjusting the tension of the spring 23.

A la figure 6 on a représenté un dispositif économiseur comprenant un corps 37 qui présente une face plane 38 par laquelle il est fixé sur une face correspondante d'un appareil notamment un distributeur 39 dont les orifices 40, 40a, 40b sont situés en regard des orifices d'alimentation et d'échappement du dispositif économiseur.In Figure 6 there is shown an economizer device comprising a body 37 which has a flat face 38 by which it is fixed to a corresponding face of an apparatus including a distributor 39 whose orifices 40, 40a, 40b are located opposite the supply and exhaust ports of the economizer.

Le clapet 30 est commandé par un piston 13 de la même manière qu'il a été décrit ci-dessus en ce qui concerne le dispositif de la figure 2.The valve 30 is controlled by a piston 13 in the same manner as described above with regard to the device in FIG. 2.

A la figure 7 on a représenté un dispositif identique à celui de la figure 6 mais disposé en sandwich entre deux appareils 41 et 42. A cet effet le corps 37 du dispositif comporte deux faces planes 37a, 37b qui sont en contact acec des faces correspondantes des deux appareils.In Figure 7 there is shown a device identical to that of Figure 6 but sandwiched between two devices 41 and 42. For this purpose the body 37 of the device has two plane faces 37a, 37b which are in contact with corresponding faces of the two devices.

Des orifices 43a, b, c des appareils assurent une communication directe acvec les orifices du corps 37 du dispositif économiseur.Ports 43a, b, c of the devices provide direct communication with the orifices of the body 37 of the economizer device.

A la figure 8 on a représenté un dispositif économiseur dans lequel le corpd 7 renferme un piston 44 qui présente un trou borgne 32 dans lequel est montée coulissante la tige 31 du clapet 30.FIG. 8 shows an economizer device in which the body 7 contains a piston 44 which has a blind hole 32 in which the rod 31 of the valve 30 is slidably mounted.

A sa partie supérieure le corps 7 est fermé par un bouchon 45 contre lequel est en appui par l'une de ses extrémités un ressort 46 qui agit par son autre extrémité sur le piston 44. Dans le bouchon 45 il est prévu un trou taraudé dans lequel est engagée une vis comportant à l'une de ses extrémités une goupille 48 en appui contre des organes 49 solidaires du piston 44.At its upper part the body 7 is closed by a plug 45 against which is supported by one of its ends a spring 46 which acts by its other end on the piston 44. In the plug 45 there is provided a tapped hole in which is engaged a screw comprising at one of its ends a pin 48 bearing against members 49 integral with the piston 44.

Cette disposition permet de comprimer plus ou moins le ressort 46 en agissant sur la vis 47 et sur le piston 44 pour régler le débit d'air et par suite la vitesse du piston 2 du vérin.This arrangement makes it possible to more or less compress the spring 46 by acting on the screw 47 and on the piston 44 to adjust the air flow and consequently the speed of the piston 2 of the jack.

Au-dessus de la tubulure 10 est montée sur le corps 7 par sa douille 27 une tubulure 26 reliée par le conduit 28 à l'échappement de la chambre 1 b du vérin. La tubulure 26 présente un conduit incliné 50 qui débouche dans un espace annulaire 51 en communication par un orifice 52 du corps 7 et un conduit 53 ménagé dans la partie centrale du piston 44 avec une chambre 54 disposée au-dessus du piston 44.Above the tube 10 is mounted on the body 7 by its sleeve 27 a tube 26 connected by the conduit 28 to the exhaust of the chamber 1b of the jack. The tubing 26 has an inclined conduit 50 which opens into an annular space 51 in communication through an orifice 52 of the body 7 and a conduit 53 formed in the central part of the piston 44 with a chamber 54 disposed above the piston 44.

La partie de la chambre 54 située sous le piston est reliée à l'atmosphère par un conduit 55 dans le corps 7, un espace annulaire 56 séparé de l'espace annulaire 51 par un joint torique 57, et un orifice 58 ménagé dans la douille 27.The part of the chamber 54 located under the piston is connected to the atmosphere by a conduit 55 in the body 7, an annular space 56 separated from the annular space 51 by an O-ring 57, and an orifice 58 formed in the socket. 27.

A la figure 9 on a représenté un dispositif dans lequel un piston 59 est relié à une soupape 60 par une tige 61, ladite soupape étant maintenue sur son siège en position de fermeture par un ressort 62 disposé dans un logement 63 d'un bouchon 64 engagé dans le corps 7 et présentant une partie filetée 65 qui est engagée dans un trou taraudé correspondant d'une bague 66 montée rotative et prisonnière par une nervure 67 engagée dans une gorge sur le corps 7.In Figure 9 there is shown a device in which a piston 59 is connected to a valve 60 by a rod 61, said valve being held in its seat in the closed position by a spring 62 disposed in a housing 63 of a plug 64 engaged in the body 7 and having a threaded part 65 which is engaged in a corresponding tapped hole of a ring 66 mounted rotatably and captive by a rib 67 engaged in a groove on the body 7.

Cette disposition permet en agissant par rotation sur la bague 66 de déplacer axialement le bouchon 64 et de comprimer plus ou moins le ressort 62 pour régler le débit de fluide et la vitesse du piston du vérin.This arrangement allows by acting by rotation on the ring 66 to move the plug 64 axially and more or less compress the spring 62 to adjust the fluid flow and the speed of the piston of the jack.

Sur la douille 9 il est prévu un clapet à bille unidirectionnel 68 permettant de mettre à l'atmosphère l'espace situé au-dessus de la soupape 60.On the socket 9 there is provided a unidirectional ball valve 68 making it possible to vent the space located above the valve 60.

Lorsque la chambre 1a du vérin 1 (figure 1) est alimentée en fluide, la soupape 60 est en position d'ouverture, le piston 59 étant soulevé à l'encontre de l'action du ressort 62 par la pression du fluide s'échappant de la chambre 1 du vérin qui pénètre dans la chambre 69 par la tubulure 26.When the chamber 1a of the jack 1 (FIG. 1) is supplied with fluid, the valve 60 is in the open position, the piston 59 being raised against the action of the spring 62 by the pressure of the escaping fluid from chamber 1 of the jack which enters chamber 69 via the tubing 26.

Dès que là pression du fluide d'échappement disparaît lorsque le piston 2 du vérin 1 arrive en fin de course, le piston 59 revient à sa position initiale sous l'action du ressort 62 et la soupape 60 revient en position de fermeture.As soon as the pressure of the exhaust fluid disappears when the piston 2 of the cylinder 1 reaches the end of the stroke, the piston 59 returns to its initial position under the action of the spring 62 and the valve 60 returns to the closed position.

Le clapet unidirectionnel 20 permet de court-cir- cuiter la soupape 60 pour permettre le passage du fluide en sens inverse lorsque la chambre 1 a du vérin est en phase d'échappement.The unidirectional valve 20 makes it possible to short-circuit the valve 60 to allow the passage of the fluid in the opposite direction when the chamber 1 a of the jack is in the exhaust phase.

Le dispositif représenté à la figure 10 est analogue à celui de la figure 9 sauf en ce qui concerne le corps 70 qui est d'une seule pièce et présente deux tubulures 71, 72 qui sonst situées dans le prolongement l'une de l'autre suivant un même axe pour leur montage sur un conduit.The device shown in Figure 10 is similar to that of Figure 9 except for the body 70 which is in one piece and has two pipes 71, 72 which are located in the extension of one another along the same axis for mounting on a conduit.

Par ailleurs, la liaison avec le conduit d'échappement du fluide est réalisée au moyen d'un conduit 73 débouchant dans la chambre 69 du corps 70.Furthermore, the connection with the fluid exhaust duct is carried out by means of a duct 73 opening into the chamber 69 of the body 70.

A la figure 11 on a représenté un autre mode de réalisation d'un dispositif économiseur dont le clapet est commandé à la fermeture par un signal de pression émis par un détecteur de fin de course du piston 2 du vérin 1 ou tout autre moyen émettant un signal de pression.In FIG. 11 another embodiment of an economizer device is shown, the valve of which is controlled on closing by a pressure signal emitted by an end-of-stroke detector of the piston 2 of the jack 1 or any other means emitting a pressure signal.

Ce dispositif comprend un bouchon 22 présentant une partie filetée 74 par laquelle il est vissé dans le corps 7 sur lequel est monté d'équerre au moyen d'une douille 9 une tubulure 10 renfermant un clapet unidirectionnel 20. Le bouchon 22 présente un logement 75 dans lequel est monté coulissant un piston 76 soumis à l'action d'un ressort 77 et présentant à l'une de ses extrémités un organe obturateur 78 constituant la soupape venant en appui contre un siège 79 ménagé dans le corps entre les conduits 15 et 18.This device comprises a plug 22 having a threaded portion 74 by which it is screwed into the body 7 on which is mounted at right angles by means of a socket 9 a tube 10 containing a one-way valve 20. The plug 22 has a housing 75 in which a piston 76 is slidably mounted subjected to the action of a spring 77 and having one of its ends a shutter member 78 constituting the valve bearing against a seat 79 formed in the body between the conduits 15 and 18.

A la partie supérieure du bouchon 22 il est prévu un conduit 80 relié à un moyen émettant un signal de pression notamment en fin de course du piston de vérin.At the upper part of the plug 22 there is provided a conduit 80 connected to a means emitting a pressure signal, in particular at the end of the stroke of the jack piston.

Lorsqu'un fluide moteur est appliqué à la base du clapet 78 celui-ci est repoussé contre l'action du ressort 77 et il se trouve alors en position d'ouverture permettant au fluide de s'écouler vers le conduit 18 et vers la chambre 1a du vérin. Si à un moment donné un signal de pression est dirigé par le conduit 80 dans le logement 75, le fluide sous pression et le ressort 77 agissent en combinaison sur le piston 76 pour fermer le clapet 78 qui vient en appui contre le siège 79 interrompant ainsi le passage du fluide moteur.When a working fluid is applied to the base of the valve 78 it is pushed against the action of the spring 77 and it is then in the open position allowing the fluid to flow towards the conduit 18 and towards the chamber 1a of the cylinder. If at a given moment a pressure signal is directed by the conduit 80 in the housing 75, the pressurized fluid and the spring 77 act in combination on the piston 76 to close the valve 78 which comes to bear against the seat 79 thus interrupting the passage of the working fluid.

A la figure 12 on a représenté un dispositif économiseur dont la soupape est également commandée par un signal de pression. Dans le corps 7 est monté coulissant un piston 81 solidaire d'un clapet 82 maintenu en position d'ouverture par un ressort 83.In Figure 12 there is shown an economizer device whose valve is also controlled by a pressure signal. In the body 7 is slidably mounted a piston 81 secured to a valve 82 held in the open position by a spring 83.

A la partie supérieure du corps 7 il est prévu un bouchon 84 présentant une partie filetée 85 par laquelle il est engagé dans un trou taraudé d'une bague de réglage 86 présentant une nervure circulaire 87 engagée dans une gorge du corps 7, ladite bague étant ainsi maintenue rotative sur le corps 7. Cette disposition permet de régler la position de la soupape 82 par rapport à son siège lorsqu'elle est en position d'ouverture et par suite de faire varier le débit de fluide ainsi que la vitesse du piston 2 du vérin.At the upper part of the body 7 there is provided a plug 84 having a threaded part 85 by which it is engaged in a tapped hole of an adjustment ring 86 having a circular rib 87 engaged in a groove of the body 7, said ring being thus kept rotating on the body 7. This arrangement makes it possible to adjust the position of the valve 82 relative to its seat when it is in the open position and consequently to vary the fluid flow rate as well as the speed of the piston 2 cylinder.

A sa partie supérieure le bouchon 84 présente un conduit 88 par lequel un signal de pression peut être transmis au piston 81 pour effectuer la fermeture de la soupape 82 contre l'action du ressort 83 à un instant déterminé notamment lors de la position de fin de course du vérin.At its upper part, the plug 84 has a conduit 88 through which a pressure signal can be transmitted to the piston 81 to effect the closing of the valve 82 against the action of the spring 83 at a determined time, notably during the end position of cylinder stroke.

A la figure 13 on a représenté un dispositif identique à celui de la figure 12, toutefois, celui-ci ne comporte pas de ressort 83, du fait que la chambre 89 est reliée à l'atmosphère par un conduit 90.FIG. 13 shows a device identical to that of FIG. 12, however, this does not include a spring 83, owing to the fact that the chamber 89 is connected to the atmosphere by a conduit 90.

A la figure 14 on a représenté un dispositif analogue à celui de la figure 12 mais dans lequel l'entrée du signal de pression s'effectue latéralement.FIG. 14 shows a device similar to that of FIG. 12 but in which the input of the pressure signal takes place laterally.

A cet effet, le dispositif comporte au-dessus de la tubulure 10 une autre tubulure 91 qui comporte une douille 92 engagée sur le corps 7 et comportant des joints d'étanchéité 92a 92b de manière à isoler un espace annulaire entre le corps 7 et la douille 92, ledit espace annulaire reliant le conduit 93 par un orifice 94 à une chambre 95 située au-dessus du piston 81.For this purpose, the device comprises above the tubing 10 another tubing 91 which comprises a sleeve 92 engaged on the body 7 and comprising seals 92a 92b so as to isolate an annular space between the body 7 and the sleeve 92, said annular space connecting the conduit 93 through an orifice 94 to a chamber 95 located above the piston 81.

Le fluide sous pression correspondant à un signal peut donc se propager du conduit 93 à la chambre 95 où il agit sur le piston 81 contre l'action du ressort 83 et assure la fermeture de la soupape 82 normalement ouverte.The pressurized fluid corresponding to a signal can therefore propagate from the conduit 93 to the chamber 95 where it acts on the piston 81 against the action of the spring 83 and ensures the closing of the valve 82 normally open.

Le dispositif représenté à la figure 15 est identique à celui de la figure 14 sauf en ce qui concerne la disposition du corps 96 qui comporte deux tubulures 96a, 96b situées suivant un même axe dans le prolongement l'une de l'autre, lesdites tubulures asurant dans un sens le passage du fluide par la soupape 82 ou dans l'autre sens a moyen du clapet unidirectionnel 20.The device represented in FIG. 15 is identical to that of FIG. 14 except with regard to the arrangement of the body 96 which comprises two tubes 96a, 96b situated along a same axis in the extension of one another, said tubes ensuring in one direction the passage of the fluid through the valve 82 or in the other direction by means of the one-way valve 20.

Le dispositif représenté à la figure 16 est identique à celui de la figure 8, toutefois il est utilisé dans le cas d'un piston fonctionnant sous l'action d'un signal de pression.The device shown in Figure 16 is identical to that of Figure 8, however it is used in the case of a piston operating under the action of a pressure signal.

Dans ce but, la douille 27 est retournée de telle sorte que le conduit incliné 50 débouche dans l'espace annulaire 56 et par l'orifice 55 dans la chambre 54a située sous le piston 44. Par ailleurs l'espace 51 étant relié à l'atmosphère par l'orifice 58 de la douille 27, il est ainsi possible de relier à l'atmosphère l'espace 54 par le conduit 53 qui débouche dans l'espace annulaire 51.For this purpose, the sleeve 27 is turned over so that the inclined conduit 50 opens into the annular space 56 and through the orifice 55 in the chamber 54a located under the piston 44. Furthermore, the space 51 being connected to the atmosphere through the orifice 58 of the socket 27, it is thus possible to connect the space 54 to the atmosphere through the conduit 53 which opens into the annular space 51.

Lorsqu'un signal de pression est transmis par le conduit 28, le conduit 50, l'espace 52 et l'orifice 55 à la chambre 54a, le piston 44 est déplacé vers le haut à l'encontre du ressort 46, de telle sorte que le clapet 30 sous l'action su ressort 33 assure la fermeture du passage entre les conduits 15 et 18.When a pressure signal is transmitted through the conduit 28, the conduit 50, the space 52 and the orifice 55 to the chamber 54a, the piston 44 is moved upwards against the spring 46, so that that the valve 30 under the action of the spring 33 closes the passage between the conduits 15 and 18.

Claims (10)

1. An automatic economizer device (4) for compressed air made up of a simple connection body (7) comprising a cylindrical portion on which is mounted a socket (9) comprising a fluid supply pipe stub (10), this pipe stub (10) extending perpendicularly to the axis of the body (7), this latter containing a valve (12, 30, 82) capable of shutting off or freeing the passage of the supply fluid, connected by a rod (14) to a piston (13, 81) subjected to the action of an elastic member (23); the said device (4) is intended to be inserted on the one hand between one of the chambers (1 a) of a plunger (1) and a supply distributor (5) for the plunger (1), this via a conduit (11) connected to the pipe stub (10); on the other hand between the other chamber (1b) of the plunger (1) and the body (7) via another conduit (28) and a pipe stub (26, 91) leading to a chamber (29) of the body (7) situated above the piston (13) and being also connected to a conduit (6), itself directly connected do the distributor (5) in such a way that, when the piston (2) of the plunger (1) delimiting the two chambers (1a and 1b) is displaced in one direction (arrow F), the fluid escaping through the conduit (6) connecting the other chamber (1b) of the plunger (1) to the distributor (5) transmits its pressure, called leakage pressure, through the other conduit (28) into the chamber (29) of the body (7), which leakage pressure acts on a large face (13a) of the piston (13), thus placing the valve (12) in the open position, until, at the end of travel of the plunger (1), the leakage pressure disappearing, the motive pressure remains the only one to be applied to a small face (13b) of the differential piston (13) thus bringing about the closure of the valve (12); a one-way valve (20) being .provided to short-circuit the valve (12) when the piston (2) of the plunger (1) moves in the opposite direction (contrary to the arrow F) and the said valve (12) then finds itself in the open position under the action of the elastic member (23).
2. A device according to claim 1, characterised in that the body (7) has at its lower portion a threaded pipe stub (15) for the passage of fluid, which is capable of being screwed onto a supporting member.
3. A device according to claim 1, characterised in that the body (7) has at its lower portion two pipe stubs (35, 96a; 36, 96b) for direct passage of the fluid which are situated in extension one of the other on one and the same axis, the said pipe stubs (35, 96a; 36, 96b) having a traversing conduit the opening of which is controlled by the valve (12, 30, 82) the said body being provided at its upper portion with a socket (27, 92) having a pipe stub (26, 91) putting a space situated above or below the piston into communication with a pressure signal pick-up, the said pipe stub (26, 91) opening into the body (7) perpendicularly to its axis.
4. A device according to claim 1, characterised in that it comprises a valve (30) of open type controlling the passage of the motive fluid and of the leakage fluid, the said valve (30) being subjected to the action of a spring (33) and having a rod (31) mounted so as to slide in a blind hole (32) of the differential piston (13).
5. A device according to claim 4, characterised in that the piston (44) has a central conduit (53) opening out above the face of the piston (44) having a large cross-section and laterally facing a conduit (50) provided in the socket pipe stub (26) connected to a pressure leakage conduit, the said socket pipe stub being able to be returned to supply a chamber (54a) provided under the piston on the side opposite to the elastic member (46) when the nozzle (26) is connected to a fluid pressure signal emitter.
6. A device according to claim 1, characterised in that it comprises a valve (60) normally closed under the action of a spring (62) acting on one of the faces of the control piston (59), the other face of which is subjected to the fluid leakage pressure from the other chamber of the plunger (1).
7. A device according to claim 1, characterised in that it comprises normally closed a valve (78) forming a piston (75) subjected on one of its faces to the combined action of a spring (77) and of a pressure signal, and on the other face to the action of the motive fluid.
8. A device according to claim 1, characterised in that it comprises a valve (82) normally opened under the action of an elastic member (83) acting on one of the faces of the piston (81), the other face of which is subjected to the action of a pressure signal.
9. A device according to claims 1 or 4, characterised in that the connection body (37) has a plane surface (38) in contact with a corresponding surface of an apparatus (39) on which it is mounted, conduits (40, 40a, 40b) of the apparatus being in communication with the conduits of the economizer device.
10. A device according to claims 1 or 4, characterised in that the connection body (37) is disposed between a fluid distributor (42) and a base (41) with which it is in contact by two of its faces (37a, 37b), the said base having integral channels and establishing communication, on the one hand with the conduits opening out on one of the faces of the said body (37), and, on the other hand, with the plunger and the conduits for intake and leakage fluid, the said body (37) having on another face orifices of conduits situated opposite the orifices of the conduits of the distributor.
EP84901374A 1983-04-12 1984-04-11 Automatic compressed air saving device Expired EP0144337B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8305965 1983-04-12
FR8305965A FR2544403B1 (en) 1983-04-12 1983-04-12 AUTOMATIC COMPRESSED AIR SAVING DEVICE

Publications (2)

Publication Number Publication Date
EP0144337A1 EP0144337A1 (en) 1985-06-19
EP0144337B1 true EP0144337B1 (en) 1988-08-03

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EP84901374A Expired EP0144337B1 (en) 1983-04-12 1984-04-11 Automatic compressed air saving device

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US (1) US4741249A (en)
EP (1) EP0144337B1 (en)
JP (1) JPS60501512A (en)
DE (1) DE3473171D1 (en)
ES (1) ES8502220A1 (en)
FR (1) FR2544403B1 (en)
IT (2) IT1180055B (en)
WO (1) WO1984004138A1 (en)

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AT386258B (en) * 1985-03-15 1988-07-25 Hoerbiger Ventilwerke Ag CONTROL ARRANGEMENT FOR PNEUMATIC WORK CYLINDERS
FR2637326B1 (en) * 1988-09-16 1992-10-16 Levenez Yves PILOT ADJUSTER-ADJUSTER FOR SPEED ADJUSTMENT OF PNEUMATIC CYLINDERS
JP3778634B2 (en) 1996-11-22 2006-05-24 Ｓｍｃ株式会社 Speed controller with pilot check valve
DE20106511U1 (en) 2001-04-14 2001-08-02 Festo Ag & Co Valve unit with unlockable non-return valve and thus equipped fluid-operated drive
FR2915786B1 (en) * 2007-05-03 2009-07-17 Legris Sa BLOCKING TYPE CONNECTOR WITH FLAP AND PURGE
FR2915787B1 (en) * 2007-05-03 2012-05-18 Legris Sa CLAMP-TYPE BLOCK CONNECTOR AND PRESSURE BALANCING MEANS
JP6551740B2 (en) * 2015-10-28 2019-07-31 Smc株式会社 Fluid control valve
US10480542B2 (en) * 2016-06-22 2019-11-19 Aladdin Engineering And Manufacturing, Inc. Valve system for pneumatic cylinders
US10927858B2 (en) 2016-06-22 2021-02-23 Aladdin Engineering And Manufacturing, Inc. Valve system for pneumatic cylinders

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Patent Citations (1)

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EP0089881A2 (en) * 1982-03-19 1983-09-28 Legris-Société Anonyme dite Compressed air economising device

Also Published As

Publication number Publication date
IT8467368A0 (en) 1984-04-12
DE3473171D1 (en) 1988-09-08
IT8467368A1 (en) 1985-10-12
IT1180055B (en) 1987-09-23
WO1984004138A1 (en) 1984-10-25
US4741249A (en) 1988-05-03
EP0144337A1 (en) 1985-06-19
FR2544403A1 (en) 1984-10-19
ES531442A0 (en) 1984-12-16
IT8453257V0 (en) 1984-04-12
ES8502220A1 (en) 1984-12-16
JPS60501512A (en) 1985-09-12
FR2544403B1 (en) 1985-08-09

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