FR2517382A1 - Circuit to recover compressed air from ram - has some exhausted air fed back to tank and remainder to atmosphere - Google Patents

Circuit to recover compressed air from ram - has some exhausted air fed back to tank and remainder to atmosphere Download PDF

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Publication number
FR2517382A1
FR2517382A1 FR8122457A FR8122457A FR2517382A1 FR 2517382 A1 FR2517382 A1 FR 2517382A1 FR 8122457 A FR8122457 A FR 8122457A FR 8122457 A FR8122457 A FR 8122457A FR 2517382 A1 FR2517382 A1 FR 2517382A1
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FR
France
Prior art keywords
air
distributor
drawer
atmosphere
compressed air
Prior art date
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Withdrawn
Application number
FR8122457A
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French (fr)
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Individual
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Individual filed Critical Individual
Priority to FR8122457A priority Critical patent/FR2517382A1/en
Publication of FR2517382A1 publication Critical patent/FR2517382A1/en
Withdrawn legal-status Critical Current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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41554—Flow control characterised by the connections of the flow control means in the circuit being connected to a return line and a directional control valve
    • 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
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid 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
    • F15B2211/40—Flow control
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/625—Accumulators

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  • Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

The circuit is for a cylinder (8) from which compressed air escapes periodically. It has a two way distributor, one path (AC) joining the air entry (A) to an outlet (C) connected to a collecting tank (R). The other path (AB) opens when the first closes, with a time delay. This allows air remaining in the cylinder to pass to atmosphere via the outlet (B). The distributor rod returns to rest when the air in the cylinder is exhausted. A return spring (7) controls the distributor rod and the delay is given by a restriction (4) and valve (3).

Description

Ce dispositif pneumatique concerne des appareils tels que des vérins pour lesquels de l'air s'échappe à ch,jqlle cycle de fonctionnement,il permet de récupérer une partie de I'nergie libre.  This pneumatic device relates to devices such as jacks for which air escapes from ch, jqlle operating cycle, it makes it possible to recover part of the free energy.

Les dispositifs connus et qui donnent des résultats analogues sont soit constitués de distributeurs classiques commandés dans une certaine chronologie soit de distribu -teurs à fonctionnement par séquences .Ils présentent l'inconvénient de la complexité ou de la nécessité d'une modification importante de l'installation en remplaçant par exemple un distributeur par un autre
L'invention qui va être décrite permet d'éviter ces inconvénients.Ce dispositif se rajoute sur la sortie d'air d'échappement d'un distributeur et est à relier au compres -seur ou à un réservoir qui alimentera une autre installatic consommatrice d'air comprimé.Son fonctionnement est autonome et n'influence que très peu le fonctionnement de llinstalla- -tion sur laquelle il est installé.The known devices which give similar results are either constituted by conventional distributors controlled in a certain chronology or by distributors-operating in sequence. They have the drawback of the complexity or of the need for a significant modification of the installation by replacing, for example, a distributor with another
The invention which will be described makes it possible to avoid these drawbacks. This device is added to the exhaust air outlet of a distributor and is to be connected to the compressor or to a tank which will supply another consuming installation. compressed air. Its operation is autonomous and has very little influence on the operation of the installation on which it is installed.

Le dispositif , objet de l'invention , comporte un distributeur à commande pneumatique à 2 voies et 3 orifices à rappel par ressort et deux limiteurs de débit unidirec -tionnels.Dans sa position de repos , le distributeur met en communication son entrée reliée à l'échappement de l'or- -g2ne dont on veut récupérer l'air libéré avec un réservoir qui accumulera l'air comprimé avant sa réutilisation . Une petite partie de l'air qui arrive à ce distributeur est détourné pour traverser deux limiteurs de débit unidirection successifs montés en sens inverse . Cet air actionne avec un retard déterminé par un des limiteurs de débit un petit vérin qui pousse le tiroir du distributeur récupérateur. The device which is the subject of the invention comprises a pneumatically operated distributor with 2 channels and 3 spring return orifices and two unidirec -tional flow limiters. In its rest position, the distributor communicates its input connected to the 'Or- -g2ne exhaust from which we want to recover the air released with a tank that will accumulate compressed air before its reuse. A small part of the air which arrives at this distributor is diverted to pass through two successive one-way flow restrictors mounted in opposite directions. This air actuates with a delay determined by one of the flow limiters a small cylinder which pushes the drawer of the recuperator distributor.

La nouvelle position du tiroir est telle que ltentrée du distributeur récupérateur est reliée à l'air libre,ce qui permet la purge complète de l'installation dont on a récupéré une partie de l'air
Simultanément , le vérin de pilotage du distributeur se purge à travers le circuit d'échappernent qui vient d'etre ouvert;ainsi,letiroir peut revenir dans sa position initiale prêt à fonctionner pour un autre cycle . De façon à ce que le tiroir ne revienne pas à cette position de repos avant que l',échappement ne se soit fait complètement,l'air est freiné à la sortie du petit vérin de pilotage par le deuxième limiteur de débit.The new position of the drawer is such that the inlet of the recovery distributor is connected to the open air, which allows the complete purging of the installation from which part of the air has been recovered.
Simultaneously, the valve actuator is purged through the exhaust circuit which has just been opened; thus, the drawer can return to its initial position ready to operate for another cycle. So that the drawer does not return to this rest position before the exhaust is completely done, the air is braked at the outlet of the small control cylinder by the second flow limiter.

Les schémas , et 2 représentent une réalisation par -ticulière du dispositif inventé. The diagrams, and 2 represent a particular embodiment of the invented device.

Ce dispositif comprend un distributeur I à trois orifices et deux voies dont l'orifice A est relié à l'échap- -pement du dispositif dont on veut récupérer une partie de
l'air comprimé. En position de repos, ce distributeur
est dans la position Je la figure 1 .Dès que de l'dit
active en D , il prend deux vuies ; l'une est celle du
distributeur qui le mène à un réservoir tampoll dont ld
pression intérieure est Inférieure à celle du dislJositif
b d'où vient l'air , l'autre arène de l'air à travers
un clapet 3 libre dans ce sens et une restriction 4 vers
le vérin d pilotage 6 du tiroir I .Cette restriction 4 d'ternine un délai tel que les pressions de l'air
dans 1 dispositif 8 et le réservoir R ont eu le ten.ips
de s'équilibrer avant que le tiroir du dit distributeur
ne prenne la position représentée par la figure 2 sous
l'impulsion de son vérin de pilotage
Dans cette nouvelle position , ie reste
de l'air contenu dans le dispositif 8 peut partir à
l'atmosphère.This device comprises a distributor I with three orifices and two channels, the orifice A of which is connected to the exhaust of the device from which we want to recover part of
compressed air. In the rest position, this dispenser
is in position I Figure 1. As soon as the said
active in D, it takes two roads; one is that of
distributor which leads it to a tampoll tank including ld
internal pressure is lower than that of the device
b where the air comes from, the other arena of air through
a valve 3 free in this direction and a restriction 4 towards
the control cylinder 6 of the drawer I. This restriction 4 of internine a delay such as air pressures
in 1 device 8 and the tank R had the ten.ips
to balance before the drawer of said distributor
only take the position represented by figure 2 under
the impulse of its pilot cylinder
In this new position, ie remains
the air contained in the device 8 can leave at
the atmosphere.

Simultanément , l'air du vérin de pilotage 6 s'échappe à travers le clapet 5 libre dans
ce sens et la restriction 2 vers la voie AB du distributeur.Simultaneously, the air from the pilot cylinder 6 escapes through the free valve 5 in
this direction and restriction 2 towards the distributor channel AB.

Cette restriction 2 détermine un retard au retour en
arrière du vérin d tel que l'échappement de l'air du
dispositif 8 a eu le temps de se faire le plus complètement possible . Le tiroir est ramené en arrière par le
ressort 7 . Le dispositif est prêt pour refaire un
nouveau cycle de récupération .This restriction 2 determines a delay in returning to
rear of cylinder d such that the exhaust air from
device 8 has had time to be done as completely as possible. The drawer is brought back by the
spring 7. The device is ready to redo a
new recovery cycle.

On pourra avantageusement prévoir un
clapet 9 sur le réservoir de stockage conçu de telle
façon que 5i celui-ci est à une pression inférieure à
celle de l'atmosphère, par l'effet d'aspiration du
compresseur , il s'ouvre pour permettre 11alimentation de ce dernier en air à la pression atmosphérique .Advantageously, a
valve 9 on the storage tank designed in such a way
way that 5i this one is at a pressure less than
that of the atmosphere, by the suction effect of the
compressor, it opens to allow the latter to be supplied with air at atmospheric pressure.

Grâce à ce dispositif , il est possible
récupérer de l'air comprimé donc de l'énergie . En effet l'air contenu dans le réservoir R est réutilisé soit pour alimenter une autre installation pneumatique qui n'a pas besoin d'une pression d'air aussi importante que celle du réseau , soit pour servir de source d'air com plémentaire au compresseur alimentant le réseau de distribution .Dans ce dernier cas , le travail de celui-ci est diminué
Une réalisation de ce dispositif avec composants du commerce reliés entre eux de la manière
représentée par les schémas ont permis de vérifier avec un réservoir de capacité égale à celle du vérin qu'au premier changement de position de ce vérin , donc
à la première libération d'air , il s'établit une pression dans le réservoir qui est égale à la moitié de celle du réseau d'alimentation du vérin . Si ce dernier est en charge , son délai de réponse est augmenté de quelques centièmes de secondes . Ce délai correspond au temps nécessaire à la récupération de l'air et à la purge de ce qui reste dans le vérin ; le mouvement de celui-ci ne pouvant se faire que lorsque la chambre opposée à celle qui vient d'être remplie d'air s'est bien vidée . Un nouveau cycle permet d'augmenter la pression dans le réservoir de récupération , par contre ce qui est évacué du vérin après cette récupération représente un volume plus important que précédemment.Thanks to this device, it is possible
recover compressed air therefore energy. In fact, the air contained in the reservoir R is reused either to supply another pneumatic installation which does not need an air pressure as high as that of the network, or to serve as a complementary air source to the compressor supplying the distribution network. In the latter case, the work thereof is reduced
An embodiment of this device with commercial components linked together in the manner
represented by the diagrams made it possible to verify with a tank of capacity equal to that of the jack that at the first change of position of this jack, therefore
at the first release of air, a pressure is established in the tank which is equal to half that of the supply network of the jack. If the latter is in charge, its response time is increased by a few hundredths of seconds. This delay corresponds to the time necessary to recover the air and to purge what remains in the cylinder; the movement of the latter can only be done when the chamber opposite to that which has just been filled with air has been emptied. A new cycle makes it possible to increase the pressure in the recovery tank, on the other hand what is evacuated from the jack after this recovery represents a larger volume than previously.

L'intérêt du dispositif est donc d'utiliser l'air récupéré de manière aussi complète que possible The advantage of the device is therefore to use the recovered air as completely as possible

Claims (3)

à l'air libre par l'orifice B , le tiroir du distributeur revient à sa position de repos initiale lorsque l'air de l'apparillage 8 a été entièrement purgé in the open air through the orifice B, the distributor drawer returns to its initial rest position when the air of the apparatus 8 has been completely purged 1/ Dispositif de r'cupération de l'air comprimé d'un jppareillage b dont il s'échappe d'une manière cy -clique caractérisé par le fait qu'il comprend un dis -tributeir à 2 voies , l'une AC reliant l'orifice A ou drive l'air à récupérer à l'orifice C raccordé à un réservoir d'accumulation R et l'autre voie AB qui s'ouvre lorsque se ferme la précédente après un certain délai par rapport à l'instant d'arrivée de cet air et qui permet à ce cui reste d'air comprimé dans l'appareillage 8 de s'échapper 1 / Device for recovering the compressed air from a jppareillage b from which it escapes in a cyclic manner, characterized in that it comprises a 2-way dis -tributeir, one AC connecting the orifice A or drives the air to be recovered at the orifice C connected to an accumulation tank R and the other channel AB which opens when the previous one closes after a certain delay from the instant d arrival of this air and which allows this cui remaining compressed air in the apparatus 8 to escape REVENDICATIONS 2/ dispositif selon revendication I caractérisé en ce qu'une partie de l'air à récupérer est dévié à l'entrée A du distributeur pour passer à travers deux limiteurs de oebit unidirectionnels vers le vérin de pilotage du tiroir du distributeur récupérateur I de façon à ce que dans un délai déterminé par l'un d'entre eux,4, ce vérin mette le tiroir distributeur dans la position où la voie AB est ouverte , permettant ainsi à ce qui reste d'air dans l'appa -reil 8 de s'échapper à l'atmosphère , le deuxième limiteur de débit'thyant pour but de retarder la vidage de ce vérin par la même voie AB pour s'assurer qu'avant que son piston ne revienne en arrière avec le tiroir du distributeur , sous l'effet du ressort de rappel 7 de ce dernier , l'air de l'appareillage 8 a bien eu le temps de s'évacuer à l'atmos- -phère 2 / device according to claim I characterized in that part of the air to be recovered is deflected at the inlet A of the distributor to pass through two unidirectional oebit limiters towards the control cylinder of the drawer of the recuperator distributor I so that within a time limit determined by one of them, 4, this jack puts the dispenser drawer in the position where the channel AB is open, thus allowing what remains of air in the device 8 to escape to the atmosphere, the second flow limiter having the aim of delaying the emptying of this jack by the same channel AB to ensure that before its piston goes back with the distributor drawer, under the effect of the return spring 7 of the latter, the air of the apparatus 8 has had time to escape to the atmosphere 3/ Dispositif selon revendication I/ ou 2/ 3 / Device according to claim I / or 2 / caracteriseen ce qu'un clapet tare@@@@ placé sur le characterize that a tare valve @@@@ placed on the réservoir de stockage s'ouvre lorsqu celui-ci est en dépres-  storage tank opens when depressed sion de façon à ce que le compresseur puisse être alimenté so that the compressor can be supplied en air à la pressionatmosphérique  in air at atmospheric pressure
FR8122457A 1981-11-27 1981-11-27 Circuit to recover compressed air from ram - has some exhausted air fed back to tank and remainder to atmosphere Withdrawn FR2517382A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8122457A FR2517382A1 (en) 1981-11-27 1981-11-27 Circuit to recover compressed air from ram - has some exhausted air fed back to tank and remainder to atmosphere

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8122457A FR2517382A1 (en) 1981-11-27 1981-11-27 Circuit to recover compressed air from ram - has some exhausted air fed back to tank and remainder to atmosphere

Publications (1)

Publication Number Publication Date
FR2517382A1 true FR2517382A1 (en) 1983-06-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546694A1 (en) * 1991-12-12 1993-06-16 Ross Operating Valve Company Energy saving and monitoring pneumatic control valve system
WO1996013669A1 (en) * 1994-10-31 1996-05-09 Hydac Technology Gmbh Energy recovery device
CN102305226A (en) * 2011-06-13 2012-01-04 江铃汽车股份有限公司 Pneumatic control delay device and jolt-squeeze type molding machine utilizing same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1312482A (en) * 1961-10-16 1962-12-21 Cie Parisienne Outil Air Compr Improvements to pneumatic cylinders
FR2251738A1 (en) * 1973-11-16 1975-06-13 Outillage Air Comprime Transfer machine station hydraulic control system - supplies circuits from accumulators when main circuit pressure fails
US4030294A (en) * 1976-03-24 1977-06-21 Japan Patent Center Inc. Compressed air generating device for forklift trucks
US4163412A (en) * 1977-10-03 1979-08-07 Towmotor Corporation Fluid cylinder control with precision stop action

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1312482A (en) * 1961-10-16 1962-12-21 Cie Parisienne Outil Air Compr Improvements to pneumatic cylinders
FR2251738A1 (en) * 1973-11-16 1975-06-13 Outillage Air Comprime Transfer machine station hydraulic control system - supplies circuits from accumulators when main circuit pressure fails
US4030294A (en) * 1976-03-24 1977-06-21 Japan Patent Center Inc. Compressed air generating device for forklift trucks
US4163412A (en) * 1977-10-03 1979-08-07 Towmotor Corporation Fluid cylinder control with precision stop action

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DESIGN ENGINEERING, décembre 1977, LONDRES (GB) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546694A1 (en) * 1991-12-12 1993-06-16 Ross Operating Valve Company Energy saving and monitoring pneumatic control valve system
US5865028A (en) * 1994-10-20 1999-02-02 Hydac Technology Gmbh Energy recovery device
WO1996013669A1 (en) * 1994-10-31 1996-05-09 Hydac Technology Gmbh Energy recovery device
CN102305226A (en) * 2011-06-13 2012-01-04 江铃汽车股份有限公司 Pneumatic control delay device and jolt-squeeze type molding machine utilizing same

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