EP0146614A1 - Relai electro-fluidique. - Google Patents
Relai electro-fluidique.Info
- Publication number
- EP0146614A1 EP0146614A1 EP84902452A EP84902452A EP0146614A1 EP 0146614 A1 EP0146614 A1 EP 0146614A1 EP 84902452 A EP84902452 A EP 84902452A EP 84902452 A EP84902452 A EP 84902452A EP 0146614 A1 EP0146614 A1 EP 0146614A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- improvement
- electrical
- fluid
- relays according
- jack
- 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
Links
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
- 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.
- Electro-fluidic relays are known comprising on the one hand an electrical supply input, an output providing an electrical signal and a control input for pressurized fluid, and on the other hand inside the body a switching device. provided with an elastic membrane and a movable part in translation which is capable of pushing and releasing the push button of an electrical contactor making it possible to deliver or cut an electrical signal.
- Such a relay which is well known per se, 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 probability of their deterioration, the pressure losses or transmission delays and the accumulation of lubricating oil in the cylinders. obstructing the fast 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.
- the relay consists of a fitting fixed directly to an appliance or to a pipe and comprising a body having a pneumatic control input in communication with said device or said piping, said control input being connected to a space. located on one side of an elastic membrane subjected to the fluid pressure established in the control input, said membrane being connected by a transmission member sliding in the body to a control means of an electrical contactor connected to a electrical supply circuit and 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 power supply to the jack.
- FIG. 2 is a longitudinal sectional view of another embodiment of a relay in which the supply channel from the conduit to the jack is integrated in the body of the relay;
- FIG. 3 is a longitudinal sectional view of a relay whose hollow screw has a conical male thread
- FIG. 4 is a longitudinal sectional view of a relay, the return of the transmission member is provided by a spring.
- the electro-fluidic relay shown in FIG. 1 has the form of a fitting 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.
- stage bore 29 intended to receive a switching device 3 comprising different members 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 opens on one side through the tubing 10 into the cylinder body 5 and on the other side through 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 plug 24.
- the electrical contactor 23 comprises electrical connection members 26 which are connected to an electrical current supply circuit and to an output signal output circuit depending on 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 threaded hole 4 of the jack and the axial duct 6a which opens into the cylinder 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 putting the conduit 6a of the screw in 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.
- FIG. 3 Another embodiment of the relay has been shown 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 abutment member 37 may be provided on the transmission member 18.
- the electrical contactor 23 can be provided either for delivering an electric current at rest, or for cutting off an electric current at rest.
- an electrical contactor 23 which, at rest, delivers an electrical signal to a first circuit 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)
Abstract
Description
Claims
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 true EP0146614A1 (fr) | 1985-07-03 |
EP0146614B1 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 (fr) |
EP (1) | EP0146614B1 (fr) |
JP (1) | JPS60501911A (fr) |
DE (1) | DE3473629D1 (fr) |
ES (1) | ES534348A0 (fr) |
FR (1) | FR2548287B1 (fr) |
WO (1) | WO1985000204A1 (fr) |
Families Citing this family (6)
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 (fr) * | 1997-06-15 | 1998-12-23 | Maschinenbau Kirow Leipzig Rail & Port Ag | Vehicule pour charges lourdes avec dispositif de securite antisurcharge |
CN209808961U (zh) * | 2018-08-24 | 2019-12-20 | 李少麟 | 按摩装置 |
GB201820718D0 (en) | 2018-12-19 | 2019-01-30 | Agco Int Gmbh | Sealing device |
EP3772595B1 (fr) * | 2019-08-09 | 2023-08-02 | Siko GmbH | Unité de capteur pour cylindre fluidique et cylindre fluidique |
EP4242601A1 (fr) * | 2022-03-11 | 2023-09-13 | Goodrich Corporation | Capteur de niveau |
Family Cites Families (6)
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 |
-
1983
- 1983-06-20 FR FR8310163A patent/FR2548287B1/fr not_active Expired
-
1984
- 1984-06-19 DE DE8484902452T patent/DE3473629D1/de not_active Expired
- 1984-06-19 JP JP59502439A patent/JPS60501911A/ja active Pending
- 1984-06-19 WO PCT/FR1984/000153 patent/WO1985000204A1/fr active IP Right Grant
- 1984-06-19 EP EP84902452A patent/EP0146614B1/fr not_active Expired
- 1984-06-19 ES ES534348A patent/ES534348A0/es active Granted
-
1987
- 1987-02-02 US US06/938,161 patent/US4742194A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8500204A1 * |
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 |
EP0146614B1 (fr) | 1988-08-24 |
DE3473629D1 (de) | 1988-09-29 |
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