EP0146614B1 - Relai electro-fluidique - Google Patents

Relai electro-fluidique Download PDF

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Publication number
EP0146614B1
EP0146614B1 EP84902452A EP84902452A EP0146614B1 EP 0146614 B1 EP0146614 B1 EP 0146614B1 EP 84902452 A EP84902452 A EP 84902452A EP 84902452 A EP84902452 A EP 84902452A EP 0146614 B1 EP0146614 B1 EP 0146614B1
Authority
EP
European Patent Office
Prior art keywords
relay
jack
conduit
fluid
plug
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
EP84902452A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0146614A1 (fr
Inventor
André Legris
Charles Colomb
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Legris SA
Original Assignee
Legris SA
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.)
Filing date
Publication date
Application filed by Legris SA filed Critical Legris SA
Publication of EP0146614A1 publication Critical patent/EP0146614A1/fr
Application granted granted Critical
Publication of EP0146614B1 publication Critical patent/EP0146614B1/fr
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
    • 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
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT

Definitions

  • the present invention relates to an improvement to pneumatic pressure relays, sometimes called in the following description "electro-fluidic relays", capable of signaling either the position of a mobile actuator member or the maximum or minimum pressure threshold. of a pressurized fluid circuit.
  • Such a relay which is well known in itself, can be used in circuits for controlling the movable member of a pneumatic cylinder, on fluid circuits of any kind to signal electrically the minimum threshold or the maximum threshold in good time. pressure that could affect the operational safety of these circuits.
  • This relay allows in this case to control fluid or liquid pressures in the tanks, a signal that can be delivered by the appearance or disappearance of the electric current.
  • This relay can also be used with electro-pneumatic automation circuits of machines or equipment in which a pressure of a pneumatic fluid must be transformed into an electrical signal to actuate one or more electrical components during the successive sequences of the process. 'automating.
  • this known relay When this known relay is implemented in a circuit as mentioned above, it is 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 is associated.
  • This installation method has all the drawbacks that can result from the long length of the piping required in this case, namely the propability of their deterioration, the pressure losses or transmission delays and the accumulation of lubricating oil for the cylinders. obstructing the rapid transmission of control signals by stagnation in the corresponding pipes.
  • the cylinder supply circuit includes a pneumatic speed regulator, since in this case an intermediate base must be used to make the connections between this speed regulator, the pressure relay, the cylinder and the contactor. electric on an associable base in the case of a mixed electro-pneumatic installation.
  • the object of the device according to the invention is to eliminate the aforementioned drawbacks and relates to a mixed electro-pneumatic installation in which the relay consists of a connector fixed directly to an appliance or to a pipe and comprising a body having a control input. tire in communication with said device or said piping, said control input being connected to a space situated on one side of an elastic membrane subjected to the fluid pressure established in the control input, said membrane being connected by a member transmission sliding in the body to a control means of an electrical contactor connected to an electrical supply circuit and to a circuit for transmitting an output signal as a function of the position of said membrane.
  • This arrangement allows a direct connection between the relay and the cylinder, which allows easy and simplified mounting when a speed regulator must be associated with the supply to the cylinder.
  • the electro-fluidic relay represented in FIG. 1 has the form of a connector consisting of a hollow screw 2, the axis YY ′ is arranged vertically and on which is mounted by a bore 12 a body 1 whose axis XX 'is arranged horizontally and perpendicular to the axis YY' of the hollow screw 2.
  • a stepped bore 29 intended to receive a switching device 3 comprising different bodies which will be described later.
  • the screw 2 mounted in the bore 12 of the body 1 with the interposition of a seal 30, has at one of its ends 9 a threaded pipe 10 which is screwed with the interposition of a seal 34 in a tapped hole 4 of a cylinder body 5, thus ensuring direct attachment of the connector to the cylinder.
  • the screw 2 At its end 7 the screw 2 has a polygonal external profile 33 making it possible to tighten the screw by means of an appropriate tool.
  • the screw 2 has a cylindrical shape with a bore forming an axial conduit 6 for the passage of a fluid which emerges on one side by the tube 10 in the cylinder body 5 and on the other side by its end 7 in a fitting. 11, the threaded part of which is engaged in a tapped hole 8 provided in the hollow screw 2.
  • the connector 11 which is connected by a conduit 31 to a distributor and to a source of fluid not shown in the drawing, supplies the actuator 5 with fluid.
  • the switching device 3 comprises a part of revolution 17 immobilized in the bore 29 of the body 1 of axis XX 'by a plug 24 which is fixed in the body 1 by means of a lip 25 provided at one of the ends of the body and set on the cap 24.
  • the electrical contactor 23 includes electrical connection members 26 which are connected to a circuit for supplying electrical current and to a circuit for transmitting an output signal as a function of the position of the membrane 16.
  • the directions of departure or arrival of the conduit 31 and the electrical connection members 26 of the contactor 23 are located along the axis XX 'or in a plane which is parallel to it.
  • This arrangement has the advantage of allowing an ordered pneumatic and electrical connection as well as their appropriate orientation.
  • the baffles created by the orifices 14 and 15 in the annular space formed between the bore 12 and the cylindrical part 13 of the screw make it possible, in combination with an appropriate position of this relay relative to the jack, to prevent in the vicinity of the membrane the stagnation of lubricant coming from the conduit 6 for supplying the fluid under pressure.
  • This electro-fluidic relay commonly used in pairs and mounted on each of the supply ports of a jack uses the evolution of pressures on either side of the piston to send end-of-stroke signals.
  • FIG. 2 there is shown another embodiment of the relay in which the hollow screw 2a has at its lower part a threaded pipe 10a which is screwed into a tapped hole 4 of the jack and the axial duct 6a which opens into the jack 5 at its lower part is closed at its upper part by a head 28 provided with a polygonal outer part 28a.
  • the screw 2a has orifices 14a bringing the conduit 6a of the screw into communication with an annular space 35 provided between the screw 2a and the connector body 1a, said space 35 being in communication by a conduit 27 provided in the body 1a and by a conduit 31a with a source of fluid supply via a distributor.
  • the annular space 35 opens the channel 15a for controlling the switching device.
  • This embodiment has the advantage of greater compactness of the connection, relay and jack supply assembly.
  • the embodiment of FIG. 1 makes it possible to install a speed regulator on the jack when this is necessary.
  • FIG. 3 Another embodiment of the relay has been shown in FIG. 3 in which the end 9b of the hollow screw 2b has a conical male thread 10b which can be mounted in the threaded orifice 4b of the jack whose profile of the thread presents the same characteristics as that of the relay thread. This arrangement can be used when looking for a seal in the threads.
  • a conical spring 36 is used which bears on one side against the plug 24 and on the other side against the transmission member 18, said spring acting on member 18 and the membrane 16 against the pressure of the fluid present in the conduit 6.
  • the purpose of this spring 36 is to assist the internal elastic member of the electrical switch 23 and which acts on the control member 22.
  • a stop member 37 can be provided on the transmission member 18.
  • the electrical contactor 23 can be provided either to deliver an electrical current at rest, or to cut off an electrical current at rest.
  • an electrical contactor 23 which delivers an electrical signal to a first circuit at rest and in the working position an electrical signal to a second circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Pipeline Systems (AREA)
EP84902452A 1983-06-20 1984-06-19 Relai electro-fluidique Expired EP0146614B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8310163 1983-06-20
FR8310163A FR2548287B1 (fr) 1983-06-20 1983-06-20 Perfectionnement aux relais electro-fluidiques

Publications (2)

Publication Number Publication Date
EP0146614A1 EP0146614A1 (fr) 1985-07-03
EP0146614B1 true EP0146614B1 (fr) 1988-08-24

Family

ID=9289951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84902452A Expired EP0146614B1 (fr) 1983-06-20 1984-06-19 Relai electro-fluidique

Country Status (7)

Country Link
US (1) US4742194A (ja)
EP (1) EP0146614B1 (ja)
JP (1) JPS60501911A (ja)
DE (1) DE3473629D1 (ja)
ES (1) ES534348A0 (ja)
FR (1) FR2548287B1 (ja)
WO (1) WO1985000204A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110856687A (zh) * 2018-08-24 2020-03-03 李少麟 按摩装置、按摩装置的控制方法及按摩方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695437B1 (fr) * 1992-09-04 1994-10-21 Philippe Roudaut Dispositif de validation de fin de course d'un vérin pneumatique.
WO1998057821A1 (de) * 1997-06-15 1998-12-23 Maschinenbau Kirow Leipzig Rail & Port Ag Schwerlastfahrzeug mit überlastsicherung
GB201820718D0 (en) 2018-12-19 2019-01-30 Agco Int Gmbh Sealing device
EP3772595B1 (de) * 2019-08-09 2023-08-02 Siko GmbH Sensoreinheit für fluidikzylinder und fluidikzylinder
EP4242601A1 (en) * 2022-03-11 2023-09-13 Goodrich Corporation Level sensor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA695361A (en) * 1964-10-06 H. Palen Peter Pressure control switch
US2435143A (en) * 1945-01-01 1948-01-27 Milwhite Co Inc Switch controlling assembly
FR1289186A (fr) * 1961-05-12 1962-03-30 Magneti Marelli Spa Dispositif signalant le débrayage dans les embrayages à servocommande pneumatique et commandant un circuit s'enclenchant à l'instant ou se produit ce débrayage
US3283092A (en) * 1963-04-15 1966-11-01 Bin Dicator Company Liquid level indicator
FR2483021A1 (fr) * 1980-05-23 1981-11-27 Legris Sa Relais de pression apte a signaler la position d'un organe mobile de verin
DE3031779A1 (de) * 1980-08-21 1982-03-25 Joachim Ing.(grad.) 1000 Berlin Hammer Vorrichtung zum ausloesen einer funktion bei einer vorgegebenen position eines durch ein druckmittel getriebenen kolbens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
O+P TB4 Bauelemente der Pneumatik, Krausskopf, Januar 1972, pages 463-476 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110856687A (zh) * 2018-08-24 2020-03-03 李少麟 按摩装置、按摩装置的控制方法及按摩方法

Also Published As

Publication number Publication date
JPS60501911A (ja) 1985-11-07
FR2548287B1 (fr) 1987-08-21
FR2548287A1 (fr) 1985-01-04
ES8503790A1 (es) 1985-04-16
US4742194A (en) 1988-05-03
ES534348A0 (es) 1985-04-16
WO1985000204A1 (fr) 1985-01-17
EP0146614A1 (fr) 1985-07-03
DE3473629D1 (de) 1988-09-29

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