EP0041007A1 - Pressure relay for signalling the position of the movable element of a pressure cylinder - Google Patents

Pressure relay for signalling the position of the movable element of a pressure cylinder Download PDF

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Publication number
EP0041007A1
EP0041007A1 EP81400766A EP81400766A EP0041007A1 EP 0041007 A1 EP0041007 A1 EP 0041007A1 EP 81400766 A EP81400766 A EP 81400766A EP 81400766 A EP81400766 A EP 81400766A EP 0041007 A1 EP0041007 A1 EP 0041007A1
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EP
European Patent Office
Prior art keywords
bore
channel
relay
pressure
relay according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81400766A
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German (de)
French (fr)
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EP0041007B1 (en
Inventor
Daniel Bouteille
Eric Petrimaux
Jean-Luc Burban
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Legris SA
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Legris SA
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Publication of EP0041007A1 publication Critical patent/EP0041007A1/en
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Publication of EP0041007B1 publication Critical patent/EP0041007B1/en
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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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8326—Fluid pressure responsive indicator, recorder or alarm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86622—Motor-operated
    • Y10T137/8663—Fluid motor

Definitions

  • the invention relates to a pressure relay comprising, on the one hand, a supply inlet for a first pressurized fluid, an exhaust port, an outlet port and a control input and, on the other hand part, inside its body, a dispensing device, provided with a switching member such as a valve, which is adapted to connect, by internal channels and orifices, the outlet orifice is towards the pressure input, or towards the exhaust when a pneumatic control signal is applied to said control input.
  • a pressure relay comprising, on the one hand, a supply inlet for a first pressurized fluid, an exhaust port, an outlet port and a control input and, on the other hand part, inside its body, a dispensing device, provided with a switching member such as a valve, which is adapted to connect, by internal channels and orifices, the outlet orifice is towards the pressure input, or towards the exhaust when a pneumatic control signal is applied to said control input.
  • Such a relay which is well known in itself, finds its application in particular in circuits for controlling the position of the movable member of a jack where the control signals are represented by the pressure existing in the chamber of the jack whose volume is decreasing, pressure which is canceled when the piston has actually reached its extreme position at the end of the stroke; such a relay is therefore a pressure drop relay.
  • the invention therefore proposes to provide a pressure relay, the internal constitution of which corresponds to that which is mentioned above, but in which measures will be taken to allow its direct association on a jack; in this case, the most advantageous benefits will be obtained when the power supply input of the relay is connected to a pressure tap orifice placed on the cylinder, or when a speed regulator must be associated with the supply of the cylinder .
  • the aim is achieved thanks to the fact that the body of the relay has an additional channel of large section, a first end of which comprises first mechanical and pneumatic connection means, cooperating directly with a supply port of a cylinder, a second end of which comprises second mechanical and pneumatic connection means suitable for receiving a supply pipe for the cylinder by a second pressurized fluid, the control input of the distribution device being connected to this auxiliary channel between said ends .
  • German Patent No. 1119615 is a pneumatic relay comprising a valve capable of interrupting and authorizing the circulation of a fluid, as a function of a control pressure, and where the body of this relay has a channel of large section , one end of which comprises first connection means cooperating directly with the feed inlet orifice of a jack, while the other end comprises second connection means capable of receiving the end of a pipe d 'cylinder supply; in this known relay, however, no connection is established between this channel and the input of the control signal, and the aim pursued here, namely to effect a blocking of the jack in the event of a pipe rupture, has nothing in common with that which is referred to in the present invention.
  • a pneumatic relay 1 visible in FIG. 1, comprises a body 2 in which are formed, on the one hand, a first bore 3 of axis XX ', intended to receive a pneumatic distribution device, generally indicated by 4 associated with a pneumatic connector 5 and, on the other hand, a second bore 7 of axis YY ', substantially perpendicular to XX' in this figure, intended to receive a part 6 of generally hollow cylindrical shape, used for direct fixing of the body in a supply port 8 ′, of a cylinder body 8 placed on one end of the cylinder of the cylinder. This part 6 is axially traversed by a concentric bore allowing the passage of a fluid.
  • This bore therefore constitutes a channel 9, formed in the cylindrical part, having at a first end 60 of the part an orifice 10 external to the jack, and at a second end 61 an orifice 11, communicating with the internal volume of the jack.
  • This part 6 also has at its first end of the channel 9 an internal thread 12 and an external polygonal clamping head 13 while the second end is constituted by an extension projecting from the body and provided with an external thread 14; seals 15 and 16 are respectively placed between the head and a first bearing surface 17 of the body 2 and between a second bearing surface 18 of the body, opposite and parallel to 17, and the jack.
  • annular space 20 which is connected to the channel 9 by lateral openings of the part 6 such as 21 which terminate at the external surface of the portion 19.
  • a channel 22 of the body connects the second bore 7 to a bottom 23 of the first bore 3.
  • the annular space 20 may also not exist if the openings 21 are connected directly to the channel 22.
  • the dispensing device 4 comprises a skirt of revolution 24 having a first coaxial chamber 25 placed on the side of the bottom 23 and communicating with a second coaxial chamber 26 through an orifice 27; moreover, the first chamber communicates by a lateral passage 28 with a first external annular groove 29, while the second chamber communicates by a passage 30 with a second external annular groove 31 in the skirt; these two grooves being separated by an external annular rib 32.
  • a switching member 33 axially movable along XX ', and having one end 34 in the first chamber, passes through the orifice 27 to enter the second chamber through a second end 35 carrying a valve 36 capable of closing and opening the orifice 27 when this member 33 is moved to the left and respectively to the right.
  • an elastic membrane 38 is placed, which is pinched tightly on its periphery, while a second front wall 39 of the skirt, opposite the first, serves as a 'support to a plug 40 which is placed at the end 41 of the bore 3.
  • This plug which carries the pneumatic connector 5, has a channel 42 of which an outlet orifice 43 is placed opposite the valve, and one of which inlet 44 communicates with piping 45, the end of which is engaged in connector 5.
  • the grooves 29 and 31 do not communicate with each other; these grooves are connected separately by respective channels 46 and 47 placed in the body 2 and leading to the bore 3 with two external pneumatic connectors 48 respectively 49, the openings 50 and 51 of which open, like that of the connector 5, on an external surface 52 of the body opposite the second bore to receive ends of pipes not shown and comparable to 45, see also Figure- 2 .
  • the distribution device 4 receives a first supply pressure Q through the piping 45 engaged in the connector 5; this pressure applying the valve 36 to the orifice 27, a pressurized fluid moves through the orifice 43, the chamber 26, the passage 30, the groove 31 and the channel 47 to end at the outlet S of the connector 49 and associated piping for use and control of a suitable receiving device.
  • this pressure is transmitted to the membrane 38 through the openings 21, the space 20 and the passage 22 representing a control input C for the device 4 and causes a deformation of this membrane, the movement of which to the right repels the switching member 33 which opens the orifice 27 and closes the orifice 43.
  • a conventional pneumatic connector 52 can be fixed on its cylindrical part 6 by screwing a hollow fixing part 53 of the connector, in the threaded region 12 of the cylindrical part 6, so that 'a pressurized supply fluid P of this jack circulates through the channel 9, the cross section of which is large and through the channel 54 of the connector, a lateral extension 55 of which carries a pneumatic connector 56 connected to a distributor, not shown, by piping 57.
  • a channel 54 ′ of axis ZZ ′ is directly hollowed out in the body 2 ′ to lead to a second bore 7 ′ of axis YY ′ substantially perpendicular;
  • a hollow cylindrical fixing part 6 'of the relay similar to the previous one, but plugged at its first end 60' has a series of lateral openings 21 'to connect an internal channel 9' and the channel 54 'to one and the same annular space 20 'placed between 7' and 6 'and therefore at a control passage 22' CI leading to a distribution device 4 'similar to the previous one; as in the example in FIG.
  • the complete supply channel comprising the portions 9 ′ and 54 ′ has a large section so as not to cause pressure drops and has a first end 58 leading to the jack 8 and a second end 59 terminating by a pneumatic connector 56 ′ in a supply pipe 57 ′ in pressurized fluid P.
  • this relay When this relay operates as a pressure drop sensor relay associated with the supply of a cylinder, a pressure Q is applied continuously and the output S is connected to the exhaust E as long as the volume of the cylinder which is being decrease is subject to the pressure of the fluid escaping from the cylinder to the distributor through the auxiliary channel 9, 54; as soon as the piston of the jack has reached its extreme stroke and, as a result, said volume has reached its minimum value, the pressure in this channel is canceled and the.
  • first press Q is connected to the output S to provide a limit switch signal.
  • this relay When this relay is associated with a tapping cylinder, in order to signal that the cylinder piston has reached a certain position corresponding to a tapping orifice placed at a particular point on the cylinder, the pressure supply input Q of the relay is directly connected to this tapping hole and is therefore only supplied with pressure if the piston has passed this point. Consequently, a signal can only be delivered to the output S of the relay if the piston of the jack has not been retained by an accidental blocking before reaching the point in question.
  • the hollow cylindrical part 6 “comprises at the end 61" a conical thread 14 "capable of being engaged in a thread 8" of suitable form which is formed in the 8 “orifice of an 8" cylinder.
  • the seal between the jack and the cylindrical part is here obtained by sufficient tightening which is exerted using a tool, not shown, which cooperates with 13 "flaps placed on a portion of the cylindrical part placed between the 2 "pressure relay and 8" cylinder.
  • the upper portion 60 "of this cylindrical part therefore does not include means of cooperation with a clamping tool which makes it possible to manufacture this part 6" with thinner walls and using a metal having greater mechanical strength. weak than in the previous case.
  • the axial retention of the cylindrical part 6 "in the body of the relay is here provided on the one hand by the first upper end 60", wider than the second bore, and on the other hand by a circlip 62 placed around the part 7 "and under the lower surface 18" of the body.
  • the cylindrical part 6 has an axial channel 9" communicating with the lateral orifices 21 "; however, the upper end of this channel here has a conical thread 12" capable of receiving a connector 52 ".

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Valve Housings (AREA)
  • Fluid-Driven Valves (AREA)
  • Details Of Valves (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

Ce relais (1) comporte dans son corps (2), outre un dispositif de distribution (4) ayant une entrée de pression Q, une sortie S et un échappement E, un canal auxiliaire (9) de section importante qui est relié à une entrée de commande C dudit dispositif (4) et comporte des moyens (14 et 12), d'une part, pour fixer le corps sur un vérin et, d'autre part. pour recevoir un raccord (52) d'alimentation en pression P d'un vérin (8). Ce relais est avantageusement utilisé pour la signilisation des positions extrêmes d'un piston de vérin, ou en association avec des vérins à piquage.This relay (1) comprises in its body (2), in addition to a distribution device (4) having a pressure inlet Q, an outlet S and an exhaust E, an auxiliary channel (9) of large section which is connected to a control input C of said device (4) and comprises means (14 and 12), on the one hand, for fixing the body on a jack and, on the other hand. to receive a connection (52) for supplying pressure P to a jack (8). This relay is advantageously used for signaling the extreme positions of a cylinder piston, or in combination with tapping cylinders.

Description

L'invention se rapporte à un relais de pression comportant,d'une part,une entrée d'alimentation d'un premier fluide sous pression, un orifice d'échappement, un orifice de sortie et une entrée de commande et,d'autre part, à l'intérieur de son corps, un dispositif de distribution, pourvu d'un organe de commutation tel qu'une valve, qui est apte à relier, par des canaux et orifices internes, l'orifice de sortie soit vers l'entrée de pression, soit vers l'échappement lorsqu'un signal de commande pneumatique est appliqué sur ladite entrée de commande.The invention relates to a pressure relay comprising, on the one hand, a supply inlet for a first pressurized fluid, an exhaust port, an outlet port and a control input and, on the other hand part, inside its body, a dispensing device, provided with a switching member such as a valve, which is adapted to connect, by internal channels and orifices, the outlet orifice is towards the pressure input, or towards the exhaust when a pneumatic control signal is applied to said control input.

Un tel relais, qui est bien connu en soi, trouve notamment son application dans des circuits de contrôle de la position de l'organe mobile d'un vérin où les signaux de commande sont représentés par la pression existant dans la chambre du vérin dont le volume est en diminution, pression qui s'annule lorsque le piston a effectivement atteint sa position extrême en fin de course; un tel relais est donc un relais à chute de pression.Such a relay, which is well known in itself, finds its application in particular in circuits for controlling the position of the movable member of a jack where the control signals are represented by the pressure existing in the chamber of the jack whose volume is decreasing, pressure which is canceled when the piston has actually reached its extreme position at the end of the stroke; such a relay is therefore a pressure drop relay.

Lorsque ce relais connu était mis en oeuvre dans un circuit tel que mentionné ci-dessus, il était habituel de le placer soit dans une armoire contenant d'autres composants pneumatiques, soit sur une platine montée au voisinage du vérin auquel il était associé. Ce mode d'installation présente tous les inconvénients qui peuvent résulter de la longueur importante des tuyauteries nécessaires dans ce cas, à savoir la probabilité de leur détérioration, les pertes de charge ou délais de transmission et l'accumulation d'huile de lubrification des vérins faisant obstacle à la transmission rapide des signaux de commande par stagnation dans les tuyauteries correspondantes. Ces inconvénients sont encore augmentés soit si l'entrée d'alimentation du relais doit elle-même être reliée à une prise de pression conditionnelle située en un point particulier du cylindre du vérin, en vue de signaler le passage du piston en ce point, soit encore si le circuit d'alimentation du vérin comporte un régleur de vitesse pneumatique, car il faut dans ce cas utiliser une embase intermédiaire pour effectuer les liaisons entre ce régleur de vitesse, ce relais de pression et le vérin.When this known relay was implemented in a circuit as mentioned above, it was usual to place it either in a cabinet containing other pneumatic components, or on a plate mounted in the vicinity of the jack with which it was associated. This installation method has all the drawbacks that can result from the long length of the piping required in this case, namely the probability of their deterioration, the pressure losses or transmission delays and the accumulation of lubricating oil in the cylinders. obstructing the rapid transmission of control signals by stagnation in the corresponding pipes. These drawbacks are further increased either if the relay supply input must itself be connected to a conditional pressure tap located at a particular point on the cylinder of the jack, in order to signal the passage of the piston at this point, or also if the cylinder supply circuit includes a pneumatic speed regulator, because in this case an intermediate base must be used to make the connections between this speed regulator, this pressure relay and the cylinder.

L'invention se propose par suite de fournir un relais de pression, dont la constitution interne répond à celle qui est mentionnée ci-dessus, mais dans lequel des mesures seront prises pour permettre son association directe sur un vérin; dans ce cas, les bénéfices les plus intéressants seront obtenus lorsque l'entrée d'alimentation du relais sera reliée à un orifice de prise de pression placé sur le vérin, ou lorsqu'un régleur de vitesse devra être associé à l'alimentation du vérin.The invention therefore proposes to provide a pressure relay, the internal constitution of which corresponds to that which is mentioned above, but in which measures will be taken to allow its direct association on a jack; in this case, the most advantageous benefits will be obtained when the power supply input of the relay is connected to a pressure tap orifice placed on the cylinder, or when a speed regulator must be associated with the supply of the cylinder .

Selon l'invention, le but visé est atteint grâce au fait que le corps du relais présente un canal supplémentaire de section importante dont une première extrémité comporte des premiers moyens de raccordement mécaniques et pneumatiques, coopérant directement avec un orifice d'alimentation d'un vérin, dont une seconde extrémité comporte des seconds moyens de raccordement mécaniques et pneumatiques aptes à recevoir une tuyauterie d'alimentation du vérin par un second fluide sous pression, l'entrée de commande du dispositif de distribution étant reliée à ce canal auxiliaire entre lesdites extrémités.According to the invention, the aim is achieved thanks to the fact that the body of the relay has an additional channel of large section, a first end of which comprises first mechanical and pneumatic connection means, cooperating directly with a supply port of a cylinder, a second end of which comprises second mechanical and pneumatic connection means suitable for receiving a supply pipe for the cylinder by a second pressurized fluid, the control input of the distribution device being connected to this auxiliary channel between said ends .

On connaît également par le brevet allemand n° 1119615 un relais pneumatique comportant une valve apte à interrompre et autoriser la circulation d'un fluide, en fonction d'une pression de commande, et où le corps de ce relais présente un canal de section importante, dont une extrémité comporte des premiers moyens de raccordement coopérant directement avec l'orifice d'entrée d'alimentation d'un vérin, tandis que l'autre extrémité comporte des seconds moyens de raccordement aptes à recevoir l'extrémité d'une tuyauterie d'alimentation du vérin; dans ce relais connu, aucune liaison n'est toutefois établie entre ce canal et l'entrée du signal de commande, et le but poursuivi ici, à savoir effectuer un blocage du vérin en cas de rupture d'une canalisation,n'a rien de commun avec celui qui est visé dans la présente invention.Also known from German Patent No. 1119615 is a pneumatic relay comprising a valve capable of interrupting and authorizing the circulation of a fluid, as a function of a control pressure, and where the body of this relay has a channel of large section , one end of which comprises first connection means cooperating directly with the feed inlet orifice of a jack, while the other end comprises second connection means capable of receiving the end of a pipe d 'cylinder supply; in this known relay, however, no connection is established between this channel and the input of the control signal, and the aim pursued here, namely to effect a blocking of the jack in the event of a pipe rupture, has nothing in common with that which is referred to in the present invention.

L'invention sera mieux comprise à la lecture de la description ci-dessous, qui est accompagnée par des figures montrant des modes de réalisation non limitatifs, et parmi lesquelles :

  • - la figure 1 représente,en coupe longitudinale brisée AA', un relais de pression apte à coopérer directement avec un raccord utilisé généralement pour l'alimentation des vérins;
  • - la figure 2 illustre une vue de droite du relais de la figure 1, sans le raccord d'alimentation du vérin;
  • - la figure 3 représente,en coupe longitudinale brisée BB', un relais de pression combiné avec un organe de fixation analogue à celui d'un raccord et avec une tuyauterie d'alimentation de vérin;
  • - la figure 4 représente une vue de droite du relais selon la figure 3.
  • - la figure 5 représente une vue en coupe longitudinale partielle d'un relais apte à se fixer dans des orifices d'entrée de vérin à filetage conique, et à être vissé à l'aide d'une tête de serrage ayant une autre position que dans les exemples précédents.
The invention will be better understood on reading the description below, which is accompanied by figures showing nonlimiting embodiments, and among which:
  • - Figure 1 shows, in broken longitudinal section AA ', a pressure relay capable of cooperating directly with a fitting generally used for feeding cylinders;
  • - Figure 2 illustrates a right view of the relay of Figure 1, without the cylinder supply connection;
  • - Figure 3 shows, in broken longitudinal section BB ', a pressure relay combined with a fixing member similar to that of a connector and with a cylinder supply pipe;
  • - Figure 4 shows a right view of the relay according to Figure 3.
  • - Figure 5 shows a partial longitudinal sectional view of a relay adapted to be fixed in cylinder inlet ports with conical thread, and to be screwed using a clamping head having a position other than in the previous examples.

Un relais pneumatique l,visible à la figure 1, comprend un corps 2 dans lequel sont ménagés,d'une part, un premier alésage 3 d'axe XX', destiné à recevoir un dispositif de distribution pneumatique, indiqué généralement par 4 associé à un connecteur pneumatique 5 et,d'autre part, un second alésage 7 d'axe YY', sensiblement perpendiculaire à XX' dans cette figure,destiné à recevoir une pièce 6 de forme générale cylindrique creuse, servant à la fixation directe du corps dans un orifice d'alimentation 8', d'un corps de vérin 8 placé sur une extrémité du cylindre du vérin. Cette pièce 6 est axialement traversée par un alésage concentrique permettant le passage d'un fluide.A pneumatic relay 1, visible in FIG. 1, comprises a body 2 in which are formed, on the one hand, a first bore 3 of axis XX ', intended to receive a pneumatic distribution device, generally indicated by 4 associated with a pneumatic connector 5 and, on the other hand, a second bore 7 of axis YY ', substantially perpendicular to XX' in this figure, intended to receive a part 6 of generally hollow cylindrical shape, used for direct fixing of the body in a supply port 8 ′, of a cylinder body 8 placed on one end of the cylinder of the cylinder. This part 6 is axially traversed by a concentric bore allowing the passage of a fluid.

Cet alésage constitue donc un canal 9, pratiqué dans la pièce cylindrique, ayant à une première extrémité 60 de la pièce un orifice 10 extérieur au vérin, et à une seconde extrémité 61 un orifice 11, communiquant avec le volume interne du vérin.This bore therefore constitutes a channel 9, formed in the cylindrical part, having at a first end 60 of the part an orifice 10 external to the jack, and at a second end 61 an orifice 11, communicating with the internal volume of the jack.

Cette pièce 6 présente encore à sa première extrémité du canal 9 un filetage intérieur 12 et une tête de serrage polygonale extérieure 13 tandis que la seconde extrémité est constituée par un prolongement dépassant du corps et pourvu d'un filetage extérieur 14; des joints d'étanchéité 15 et 16 sont respectivement placés entre la tête et une première surface d'appui 17 du corps 2 et entre une seconde surface d'appui 18 du corps, opposée et parallèle à 17, et le vérin.This part 6 also has at its first end of the channel 9 an internal thread 12 and an external polygonal clamping head 13 while the second end is constituted by an extension projecting from the body and provided with an external thread 14; seals 15 and 16 are respectively placed between the head and a first bearing surface 17 of the body 2 and between a second bearing surface 18 of the body, opposite and parallel to 17, and the jack.

Entre le second alésage 7 et une portion intermédiaire 19 de la pièce 6, qui le pénètre, se trouve un espace annulaire 20 qui est relié au canal 9 par des ouvertures latérales de la pièce 6 telles que 21 qui aboutissent à la surface extérieure de la portion 19.Between the second bore 7 and an intermediate portion 19 of the part 6, which penetrates it, there is an annular space 20 which is connected to the channel 9 by lateral openings of the part 6 such as 21 which terminate at the external surface of the portion 19.

De plus, un canal 22 du corps relie le second alésage 7 à un fond 23 du premier alésage 3. L'espace annulaire 20 peut aussi ne pas exister si les ouvertures 21 sont reliées directement au canal 22.In addition, a channel 22 of the body connects the second bore 7 to a bottom 23 of the first bore 3. The annular space 20 may also not exist if the openings 21 are connected directly to the channel 22.

Le dispositif de distribution 4 comporte une jupe de révolution 24 présentant une première chambre coaxiale 25 placée du côté du fond 23 et communiquant avec une seconde chambre coaxiale 26 par un orifice 27; par ailleurs, la première chambre communique par un passage latéral 28 avec une première gorge annulaire externe 29, tandis que la seconde chambre communique par un passage 30 avec une seconde gorge annulaire externe 31 de la jupe; ces deux gorges étant séparées par une nervure annulaire 32 externe.The dispensing device 4 comprises a skirt of revolution 24 having a first coaxial chamber 25 placed on the side of the bottom 23 and communicating with a second coaxial chamber 26 through an orifice 27; moreover, the first chamber communicates by a lateral passage 28 with a first external annular groove 29, while the second chamber communicates by a passage 30 with a second external annular groove 31 in the skirt; these two grooves being separated by an external annular rib 32.

Un organe de commutation 33, mobile axialement selon XX', et ayant une extrémité 34 dans la première chambre, traverse l'orifice 27 pour pénétrer dans la seconde chambre par une seconde extrémité 35 portant un clapet 36 apte à obturer et à ouvrir l'orifice 27 lorsque cet organe 33 est déplacé vers la gauche et respectivement vers la droite.A switching member 33, axially movable along XX ', and having one end 34 in the first chamber, passes through the orifice 27 to enter the second chamber through a second end 35 carrying a valve 36 capable of closing and opening the orifice 27 when this member 33 is moved to the left and respectively to the right.

Entre le fond 23 et une première paroi frontale 37 de la jupe, est placée une membrane élastique 38, qui est pincée sur sa périphérie de façon étanche, tandis qu'une seconde paroi frontale 39 de la jupe, opposée à la première, sert d'appui à un bouchon 40 qui est placé à l'extrémité 41 de l'alésage 3. Ce bouchon, qui porte le connecteur pneumatique 5,présente un canal 42 dont un orifice de sortie 43 est placé en regard du clapet, et dont une entrée 44 communique avec la tuyauterie 45 dont l'extrémité est engagée dans le connecteur 5.Between the bottom 23 and a first front wall 37 of the skirt, an elastic membrane 38 is placed, which is pinched tightly on its periphery, while a second front wall 39 of the skirt, opposite the first, serves as a 'support to a plug 40 which is placed at the end 41 of the bore 3. This plug, which carries the pneumatic connector 5, has a channel 42 of which an outlet orifice 43 is placed opposite the valve, and one of which inlet 44 communicates with piping 45, the end of which is engaged in connector 5.

En raison de l'ajustement de la jupe dans l'alésage, et éventuellement de l'utilisation de joints d'étanchéité non représentés, les gorges 29 et 31 ne communiquent pas entre elles; ces gorges sont reliées séparément par des canaux respectifs 46 et 47 placés dans le corps 2 et aboutissant à l'alésage 3 avec deux connecteurs pneumatiques extérieurs 48 respectivement 49 dont les ouvertures 50 et 51 débouchent, comme celle du connecteur 5, sur une surface extérieure 52 du corps opposée au second alésage pour recevoir des extrémités de tuyauteries non représentées et comparables à 45, voir aussi la figure- 2.Due to the adjustment of the skirt in the bore, and possibly the use of seals not shown, the grooves 29 and 31 do not communicate with each other; these grooves are connected separately by respective channels 46 and 47 placed in the body 2 and leading to the bore 3 with two external pneumatic connectors 48 respectively 49, the openings 50 and 51 of which open, like that of the connector 5, on an external surface 52 of the body opposite the second bore to receive ends of pipes not shown and comparable to 45, see also Figure- 2 .

Le dispositif de distribution 4 reçoit une première pression d'alimentation Q par la tuyauterie 45 engagée dans le connecteur 5; cette pression appliquant le clapet 36 sur l'orifice 27, un fluide sous pression se déplace à travers l'orifice 43, la chambre 26, le passage 30, la gorge 31 et le canal 47 pour aboutir à la sortie S du connecteur 49 et à la tuyauterie associée pour utilisation et commande d'un appareil récepteur approprié.The distribution device 4 receives a first supply pressure Q through the piping 45 engaged in the connector 5; this pressure applying the valve 36 to the orifice 27, a pressurized fluid moves through the orifice 43, the chamber 26, the passage 30, the groove 31 and the channel 47 to end at the outlet S of the connector 49 and associated piping for use and control of a suitable receiving device.

Si une seconde pression P de valeur suffisante se trouve établie dans le canal 9, cette pression est transmise à la membrane 38 par les ouvertures 21, l'espace 20 et le passage 22 représentant une entrée de commande C pour le dispositif 4 et provoque une déformation de cette membrane dont le mouvement vers la droite repousse l'organe de commutation 33 qui ouvre l'orifice 27 et ferme l'orifice 43.If a second pressure P of sufficient value is established in the channel 9, this pressure is transmitted to the membrane 38 through the openings 21, the space 20 and the passage 22 representing a control input C for the device 4 and causes a deformation of this membrane, the movement of which to the right repels the switching member 33 which opens the orifice 27 and closes the orifice 43.

La pression Q qui régnait dans la chambre 26 et à la sortie S provoque maintenant la circulation du fluide qui était enfermé dans la tuyauterie correspondante à travers l'orifice 27, la première chambre 25, le passage 28, le canal 46 et le connecteur 48 qui peut être directement ouvert à l'air libre E, ou être relié à une conduite d'échappement canalisée non représentée.The pressure Q which reigned in the chamber 26 and at the outlet S now causes the circulation of the fluid which was enclosed in the corresponding piping through the orifice 27, the first chamber 25, the passage 28, the channel 46 and the connector 48 which can be directly open to the open air E, or be connected to a ducted exhaust pipe not shown.

Lorsque ce relais est utilisé sur un vérin 8, un raccord pneumatique 52 classique peut être fixé sur sa pièce cylindrique 6 par vissage d'une pièce de fixation 53 creuse du raccord, dans la région filetée 12 de la pièce cylindrique 6, de sorte qu'un fluide d'alimentation sous pression P de ce vérin circule à travers le canal 9 dont la section est importante et à travers le canal 54 du raccord dont un prolongement latéral 55 porte un connecteur pneumatique 56 relié à un distributeur, non représenté, par une tuyauterie 57.When this relay is used on a jack 8, a conventional pneumatic connector 52 can be fixed on its cylindrical part 6 by screwing a hollow fixing part 53 of the connector, in the threaded region 12 of the cylindrical part 6, so that 'a pressurized supply fluid P of this jack circulates through the channel 9, the cross section of which is large and through the channel 54 of the connector, a lateral extension 55 of which carries a pneumatic connector 56 connected to a distributor, not shown, by piping 57.

On constate à l'examen des figures 1 et 2 que les directions de départ de l'ensemble des tuyauteries telles que 45 sont sensiblement perpendiculaires à l'axe YY' de la pièce 6 et que les axes des connecteurs 5, 48 et 49 sont parallèles; cette disposition présente l'intérêt de permettre un groupement ordonné et une orientation appropriée des tuyauteries du relais pneumatique. De plus, l'existence des chicanes créées par les ouvertures 21, l'espace 20 et le passage 22 permet, en combinaison avec une position appropriée du relais par rapport au vérin, d'empêcher au voisinage de la membrane et dans le passage 22 qui y conduit la stagnation de lubrifiant provenant du vérin.On examining FIGS. 1 and 2, it can be seen that the directions of departure of all the pipes such as 45 are substantially perpendicular to the axis YY ′ of the part 6 and that the axes of the connectors 5, 48 and 49 are parallel; this arrangement has the advantage of allowing an ordered grouping and an appropriate orientation of the pneumatic relay pipes. In addition, the existence of baffles created by the openings 21, the space 20 and the passage 22 makes it possible, in combination with an appropriate position of the relay relative to the jack, to prevent in the vicinity of the membrane and in the passage 22 which leads to the stagnation of lubricant coming from the jack.

Dans un autre mode de réalisation 1' du relais, voir figures 3 et 4, un canal 54' d'axe ZZ' est directement creusé dans le corps 2' pour aboutir à un second alésage 7' d'axe YY' sensiblement perpendiculaire; une pièce cylindrique creuse de fixation 6' du relais, analogue à la précédente, mais bouchée à sa première extrémité 60' comporte une série d'ouvertures latérales 21' pour relier un canal interne 9' et le canal 54' à un seul et même espace annulaire 20' placé entre 7' et 6' et donc à un passage 22' de commande CI conduisant à un dispositif de distribution 4' analogue au précédent; comme dans l'exemple de la figure 1, le canal d'alimentation complet comprenant les portions 9' et 54' présente une section importante pour ne pas provoquer de pertes de charge et comporte une première extrémité 58 aboutissant au vérin 8 et une seconde extrémité 59 aboutissant par un connecteur pneumatique 56' à une tuyauterie d'alimentation 57' en fluide sous pression P. Ce connecteur 56' ainsi que des connecteurs 49', 5' et 48' aboutissent parallèlement sur une même face latérale 52' du corps 2'.In another embodiment 1 ′ of the relay, see FIGS. 3 and 4, a channel 54 ′ of axis ZZ ′ is directly hollowed out in the body 2 ′ to lead to a second bore 7 ′ of axis YY ′ substantially perpendicular; a hollow cylindrical fixing part 6 'of the relay, similar to the previous one, but plugged at its first end 60' has a series of lateral openings 21 'to connect an internal channel 9' and the channel 54 'to one and the same annular space 20 'placed between 7' and 6 'and therefore at a control passage 22' CI leading to a distribution device 4 'similar to the previous one; as in the example in FIG. 1, the complete supply channel comprising the portions 9 ′ and 54 ′ has a large section so as not to cause pressure drops and has a first end 58 leading to the jack 8 and a second end 59 terminating by a pneumatic connector 56 ′ in a supply pipe 57 ′ in pressurized fluid P. This connector 56 ′ as well as connectors 49 ′, 5 ′ and 48 ′ terminate in parallel on the same lateral face 52 ′ of the body 2 '.

Les deux variantes décrites présentent des avantages respectifs spécifiques qui les feront préférer en fonction de critères pris en considération par l'utilisateur.The two variants described have specific respective advantages which will make them prefer according to criteria taken into consideration by the user.

Si celui-ci souhaite utiliser un relais pneumatique et alimenter le vérin soit directement par une alimentation de pression P, soit par l'intermédiaire d'un réducteur de débit ou d'un régleur de vitesse unidirectionnel, intégrés chacun dans un raccord, sa préférence ira au mode de réalisation selon la figure 1, qui en permet la fixation dans l'alésage fileté 12.If the latter wishes to use a pneumatic relay and supply the cylinder either directly by a pressure supply P, or by means of a flow reducer or a unidirectional speed regulator, each integrated in a fitting, his preference will go to the embodiment according to FIG. 1, which allows it to be fixed in the threaded bore 12.

Si,par contre, l'utilisateur préfère bénéficier d'une meilleure compacité et d'un groupement intégral des tuyauteries, le mode de réalisation de la figure 3 répondra mieux à ses besoins.If, on the other hand, the user prefers to benefit from a better compactness and an integral grouping of the pipes, the embodiment of FIG. 3 will better meet his needs.

Lorsque ce relais fonctionne en relais capteur à chute de pression associé à l'alimentation d'un vérin, une pression Q est appliquée en permanence et la sortie S est reliée à l'échappement E tant que le volume du cylindre qui est en cours de diminution est soumis à la pression du fluide s'échappant du vérin vers le distributeur par le canal auxiliaire 9, 54; dès que le piston du vérin a atteint sa course extrême et que, par suite, ledit volume a atteint sa valeur minimale, la pression dans ce canal s'annule et la . première pression Q est reliée à la sortie S pour fournir un signal de fin de course.When this relay operates as a pressure drop sensor relay associated with the supply of a cylinder, a pressure Q is applied continuously and the output S is connected to the exhaust E as long as the volume of the cylinder which is being decrease is subject to the pressure of the fluid escaping from the cylinder to the distributor through the auxiliary channel 9, 54; as soon as the piston of the jack has reached its extreme stroke and, as a result, said volume has reached its minimum value, the pressure in this channel is canceled and the. first press Q is connected to the output S to provide a limit switch signal.

Lorsque ce relais est associé à un vérin à piquage, en vue de signaler que le piston du vérin a atteint une certaine position correspondant à un orifice de piquage placé en un point particulier du cylindre, l'entrée d'alimentation en pression Q du relais est reliée directement à cet orifice de piquage et ne se trouve donc alimentée en pression que si le piston a dépassé ce point. Par suite, un signal ne pourra être délivré à la sortie S du relais que si le piston du vérin n'a pas été retenu par un blocage accidentel avant d'atteindre le point en question.When this relay is associated with a tapping cylinder, in order to signal that the cylinder piston has reached a certain position corresponding to a tapping orifice placed at a particular point on the cylinder, the pressure supply input Q of the relay is directly connected to this tapping hole and is therefore only supplied with pressure if the piston has passed this point. Consequently, a signal can only be delivered to the output S of the relay if the piston of the jack has not been retained by an accidental blocking before reaching the point in question.

Dans une variante de réalisation du relais de pression selon la figure 1, qui est visible à la figure 5, la pièce cylindrique creuse 6" comporte à l'extrémité 61" un filetage conique 14" apte à être engagé dans un filetage 8" de forme appropriée qui est pratiqué dans l'orifice 8" d'un vérin 8"'. L'étanchéité entre le vérin et la pièce cylindrique est ici obtenue par un serrage suffisant qui est exercé à l'aide d'un outil, non représenté, qui coopère avec des pans 13" placés sur une portion de la pièce cylindrique placée entre le relais de pression 2" et le vérin 8'''.In an alternative embodiment of the pressure relay according to FIG. 1, which is visible in FIG. 5, the hollow cylindrical part 6 "comprises at the end 61" a conical thread 14 "capable of being engaged in a thread 8" of suitable form which is formed in the 8 "orifice of an 8" cylinder. The seal between the jack and the cylindrical part is here obtained by sufficient tightening which is exerted using a tool, not shown, which cooperates with 13 "flaps placed on a portion of the cylindrical part placed between the 2 "pressure relay and 8" cylinder.

La portion supérieure 60" de cette pièce cylindrique ne comporte donc pas de moyens de coopération avec un outil de serrage ce qui permet de fabriquer cette pièce 6" avec des parois plus minces et à l'aide d'un métal ayant une résistance mécanique plus faible que dans le cas précédent. Le fait que dans cette disposition le corps du relais n'est pas serré entre le vérin et la portion supérieure 60" oblige à prévoir des moyens d'étanchéité différents de ceux employés dans l'exemple précédent; la portion intermé-- diaire 19" comporte ici deux joints toriques 15" et 16" qui sont placés axialement de part et d'autre des ouvertures 21" et qui coopèrent avec la surface cylindrique du second alésage 7". Le maintien axial de la pièce cylindrique 6" dans le corps du relais est ici assuré d'une part par la première extrémité supérieure 60", plus large que le second alésage,et d'autre part par un circlips 62 placé autour de la pièce 7" et sous la surface inférieure 18" du corps.The upper portion 60 "of this cylindrical part therefore does not include means of cooperation with a clamping tool which makes it possible to manufacture this part 6" with thinner walls and using a metal having greater mechanical strength. weak than in the previous case. The fact that in this arrangement the body of the relay is not clamped between the jack and the upper portion 60 "means that it is necessary to provide sealing means different from those employed in the previous example; the intermediate portion 19" here has two 15 "and 16" O-rings which are placed axially on either side of the openings 21 "and which cooperate with the cylindrical surface of the second bore 7". The axial retention of the cylindrical part 6 "in the body of the relay is here provided on the one hand by the first upper end 60", wider than the second bore, and on the other hand by a circlip 62 placed around the part 7 "and under the lower surface 18" of the body.

Comme dans l'exemple précédent la pièce cylindrique 6" possède un canal axial 9" communiquant avec les orifices latéraux 21"; toutefois, l'extrémité supérieure de ce canal comporte ici un filetage conique 12" apte à recevoir un raccord 52".As in the previous example, the cylindrical part 6 "has an axial channel 9" communicating with the lateral orifices 21 "; however, the upper end of this channel here has a conical thread 12" capable of receiving a connector 52 ".

Claims (8)

1. Relais pneumatique de pression apte à signaler la position d'un organe mobile de vérin, comportant, dans un corps, une entrée d'alimentation en pression, un orifice d'échappement, un orifice de sortie et une entrée de commande, cette entrée d'alimentation en pression et ces deux orifices étant reliés à une chambre de commutation dans laquelle est disposé un clapet apte à relier l'entrée d'alimentation à l'un des deux orifices lorsqu'il est déplacé par un poussoir soumis à l'action d'une membrane d'isolement, qui est exposée à l'action d'une pression de commande appliquée à ladite entrée de commande et fournie par un orifice du vérin communiquant avec l'intérieur de celui-ci, caractérisé en ce que le corps (2) du relais présente un canal supplémentaire (9, 9', 54') de section importante, dont une première extrémité (11) respectivement (58) comporte des premiers moyens de raccordement mécaniques et pneuma- tiques (14) coopérant directement avec un orifice d'alimentation (8') d'un vérin (8), dont une seconde extrémité (10) respectivement (59) comporte des seconds moyens (12) respectivement (56') de raccordement mécaniques et pneumatiques aptes à recevoir une tuyauterie d'alimentation du vérin par un second fluide sous pression P, l'entrée de commande C du dispositif de distribution (4) étant reliée à ce canal auxiliaire entre lesdites extrémités.1. Pneumatic pressure relay capable of signaling the position of a mobile actuator, comprising, in a body, a pressure supply inlet, an exhaust port, an outlet port and a control input, this pressure supply inlet and these two orifices being connected to a switching chamber in which is disposed a valve able to connect the supply inlet to one of the two orifices when it is moved by a pusher subjected to the action of an isolation membrane, which is exposed to the action of a control pressure applied to said control input and supplied by an orifice of the jack communicating with the interior thereof, characterized in that the body (2) of the relay has an additional channel (9, 9 ', 54') of large cross section, a first end (11) respectively (58) comprises first mechanical coupling means and p neuma- ticks (14) cooperating directly with a feed port (8 ') of a cylinder in (8), a second end (10) respectively (59) of which comprises second means (12) respectively (56 ') for mechanical and pneumatic connection capable of receiving a supply pipe for the jack by a second fluid under pressure P , the control input C of the distribution device (4) being connected to this auxiliary channel between said ends. 2. Relais de pression selon la revendication 1, caractérisé en ce que le canal auxiliaire (9) est formé dans une pièce de révolution (6) traversant un alésage cylindrique (7) du corps (2) du relais (1), l'entrée de commande C du dispositif de distribution (4) étant reliée à ce canal par des orifices latéraux (21) traversant latéralement une paroi de cette pièce (6) et communiquant indifféremment avec un espace (20) dudit alésage (7) dans lequel débouche un canal de commande (22) de la valve, ou directement avec ce canal de commande.2. Pressure relay according to claim 1, characterized in that the auxiliary channel (9) is formed in a part of revolution (6) passing through a cylindrical bore (7) of the body (2) of the relay (1), the control input C of the distribution device (4) being connected to this channel by lateral orifices (21) passing laterally through a wall of this part (6) and communicating indifferently with a space (20) of said bore (7) into which opens a control channel (22) of the valve, or directly with this control channel. 3. Relais de pression selon la revendication 1 ou 2, caractérisé en ce que les premiers moyens sont constitués par un prolongement cylindrique saillant (61) fileté extérieurement (14) et entourant la seconde extrémité auxiliaire du canal, tandis que les seconds moyens sont constitués par un alésage cylindrique fileté intérieurement (12) dans la seconde extrémité du canal auxiliaire.3. Pressure relay according to claim 1 or 2, characterized in that the first means consist of a projecting cylindrical extension (61) externally threaded (14) and surrounding the second auxiliary end of the channel, while the second means consist of an internally threaded cylindrical bore (12) in the second end of the auxiliary channel. 4. Relais de pression selon la revendication 2, caractérisé en ce que les premiers moyens sont constitués par un prolongement cylindrique saillant fileté extérieurement (14) et placé à une première extrémité (61) d'une pièce de révolution (6), tandis que les seconds moyens sont constitués par un alésage cylindrique fileté (12) placé à une seconde extrémité (60) de la pièce de révolution (6), celle-ci comportant une portion extérieure (13) respectivement (13') au logement pourvue de moyens de coopération avec un outil de serrage qui sont représentés de préférence par une forme polygonale, cette portion, cet alésage et ce canal auxiliaire étant coaxiaux (YY').4. Pressure relay according to claim 2, characterized in that the first means consist of a projecting cylindrical extension externally threaded (14) and placed at a first end (61) of a part of revolution (6), while the second means consist of a threaded cylindrical bore (12) placed at a second end (60) of the part of revolution (6), the latter comprising an outer portion (13) respectively (13 ') to the housing provided with means of cooperation with a clamping tool which are preferably represented by a polygonal shape, this portion, this bore and this auxiliary channel being coaxial (YY '). 5. Relais selon l'une des revendications 1 à 4, caractérisé en ce que l'axe YY' du canal auxiliaire (9) est placé perpendiculairement à des axes de canaux terminés par des orifices de sortie (S) et,respectivement, d'entrée d'alimentation de premier fluide (Q) du relais, comportant chacun des moyens de raccordement pneumatique (51) respectivement (5) avec des tuyauteries extérieures.5. Relay according to one of claims 1 to 4, characterized in that the axis YY 'of the auxiliary channel (9) is placed perpendicular to the axes of channels terminated by outlet orifices (S) and, respectively, d input of the first fluid supply (Q) of the relay, each comprising pneumatic connection means (51) respectively (5) with external pipes. 6. Relais selon la revendication 1, caractérisé en ce que le corps (2') du relais comporte un canal (54') et un second alésage (7') communicants et perpendiculaires, une pièce cylindrique de fixation et de liaison pneumatique (6') pourvue d'un canal interne (9'), d'orifices latéraux (21') et d'une tête de serrage (53') étant placée dans le second alésage, ledit canal auxiliaire étant formé entre un orifice (58) d'extrémité de la pièce cylindrique (6') et un orifice (59) extérieur du canal (54') recevant un connecteur pneumatique (56') par une tuyauterie (57').6. Relay according to claim 1, characterized in that the body (2 ') of the relay comprises a channel (54') and a second bore (7 ') communicating and perpendicular, a cylindrical part for fixing and pneumatic connection (6 ') provided with an internal channel (9'), lateral orifices (21 ') and a clamping head (53') being placed in the second bore, said auxiliary channel being formed between an orifice (58) end of the cylindrical part (6 ') and an orifice (59) outside the channel (54') receiving a pneumatic connector (56 ') by a pipe (57'). 7. Relais selon l'une des revendications 1 à 6, caractérisé en ce que le dispositif de distribution (4) respectivement (4') est placé dans un premier alésage (3) du corps (2) respectivement (2' ou 2") dont l'axe XX' est perpendiculaire à l'axe YY' du second alésage (7) respectivement (7' ou 7").7. Relay according to one of claims 1 to 6, characterized in that the distribution device (4) respectively (4 ') is placed in a first bore (3) of the body (2) respectively (2' or 2 " ) whose axis XX 'is perpendicular to the axis YY' of the second bore (7) respectively (7 'or 7 "). 8. Relais selon la revendication 7, caractérisé en ce que le dispositif de distribution comporte une jupe (24) qui est placée dans le premier alésage (3), où elle est maintenue par un bouchon (40) placé à l'extrémité (41) de l'alésage (3), cette jupe ayant une face transversale (37) qui comprime la périphérie d'une membrane (38) placée au fond (23) du premier alésage et à proxi- mité du second alésage (7) respectivement (7' ou 7").8. Relay according to claim 7, characterized in that the distribution device comprises a skirt (24) which is placed in the first bore (3), where it is held by a plug (40) placed at the end (41) of the bore (3), this skirt having a transverse face (37) which compresses the periphery of a membrane (38) placed at the bottom (23) of the first bore and p roxi- mite second bore (7), respectively (7 'or 7 ").
EP81400766A 1980-05-23 1981-05-14 Pressure relay for signalling the position of the movable element of a pressure cylinder Expired EP0041007B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8011560 1980-05-23
FR8011560A FR2483021A1 (en) 1980-05-23 1980-05-23 PRESSURE RELAY POSSIBLE TO REPORTING THE POSITION OF A VERIN MOBILE MEMBER

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EP0041007A1 true EP0041007A1 (en) 1981-12-02
EP0041007B1 EP0041007B1 (en) 1985-02-13

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EP81400766A Expired EP0041007B1 (en) 1980-05-23 1981-05-14 Pressure relay for signalling the position of the movable element of a pressure cylinder

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US (1) US4492149A (en)
EP (1) EP0041007B1 (en)
JP (1) JPS5794182A (en)
DE (1) DE3168870D1 (en)
ES (1) ES8204814A1 (en)
FR (1) FR2483021A1 (en)
SU (1) SU1103802A3 (en)

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FR2343280A1 (en) * 1976-03-05 1977-09-30 Bouteille Daniel Unidirectional flow restrictor for fluid pipe - has two channels connected by third channel with non return valve
FR2343281A1 (en) * 1976-03-05 1977-09-30 Bouteille Daniel Unidirectional flow restrictor for fluid pipe - has two channels connected by third channel with non return valve
FR2352188A1 (en) * 1976-05-18 1977-12-16 Bouteille Daniel Fast emptying for pneumatic cylinder chamber - is performed using inner distributor chamber which is connected with three lines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2548287A1 (en) * 1983-06-20 1985-01-04 Legris IMPROVEMENT IN ELECTRO-FLUID RELAYS
WO1985000204A1 (en) * 1983-06-20 1985-01-17 Legris Improvement to electro-fluidic relays
US4742194A (en) * 1983-06-20 1988-05-03 Societe Anonyme Styled Legris Device for producing an electric signal indicative of pressure in a fluid system
FR2575528A1 (en) * 1984-12-28 1986-07-04 Telemecanique Electrique PNEUMATIC CONNECTION COMPRISING A REMOVABLE DETECTOR MEANS
FR2695437A1 (en) * 1992-09-04 1994-03-11 Roudaut Philippe Sensor which checks end of stroke of pneumatic jack - includes first channel connecting air inlet/outlet block with work chamber,these channels provided with first and second anti-return valve
EP1580476A1 (en) * 2004-03-22 2005-09-28 FESTO AG & Co Connector for fluid conduits

Also Published As

Publication number Publication date
EP0041007B1 (en) 1985-02-13
FR2483021A1 (en) 1981-11-27
FR2483021B1 (en) 1984-03-02
JPH0220877B2 (en) 1990-05-10
US4492149A (en) 1985-01-08
DE3168870D1 (en) 1985-03-28
ES502395A0 (en) 1982-05-01
JPS5794182A (en) 1982-06-11
ES8204814A1 (en) 1982-05-01
SU1103802A3 (en) 1984-07-15

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