EP0061786B2 - Commande hydraulique ou pneumatique - Google Patents

Commande hydraulique ou pneumatique Download PDF

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Publication number
EP0061786B2
EP0061786B2 EP19820200143 EP82200143A EP0061786B2 EP 0061786 B2 EP0061786 B2 EP 0061786B2 EP 19820200143 EP19820200143 EP 19820200143 EP 82200143 A EP82200143 A EP 82200143A EP 0061786 B2 EP0061786 B2 EP 0061786B2
Authority
EP
European Patent Office
Prior art keywords
piston
valve
chamber
cut
low
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
EP19820200143
Other languages
German (de)
English (en)
Other versions
EP0061786A1 (fr
EP0061786B1 (fr
Inventor
Walter Bischofberger
Gerhard Mauthe
Gerhard Körner
Joachim Nasterlack
Horst Plettner
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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
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Application filed by BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0061786A1 publication Critical patent/EP0061786A1/fr
Publication of EP0061786B1 publication Critical patent/EP0061786B1/fr
Application granted granted Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/34—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
    • 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

Definitions

  • the invention relates to a pressure medium-operated drive according to the preamble of patent claim 1 and the common preamble of patent claims 3 and 4.
  • Such a drive is known from DE-A 2554892.
  • the return stroke of hydraulically actuated working cylinders is accelerated by connecting an additional controllable bypass valve in parallel to a control or changeover valve, which is normally operated alone, and actuating both valves simultaneously by means of a shutoff valve arrangement.
  • the shut-off valve arrangement requires an outflow cross-section which is dimensioned for the common hydraulic actuation of the changeover and bypass valve.
  • Another pressure medium operated drive is known from CH-A 539784.
  • This drive is preferably suitable for actuating the contact arrangement of a high-voltage circuit breaker, the switch being held in the switched-on position by pressurizing the space located above the larger piston area of the differential piston with fluid under pressure via a piston rod connected to the differential piston.
  • the changeover valve is reversed so that the space above the larger piston area of the differential piston comes into contact with the low-pressure container.
  • the pressure in the space above the larger piston area is suddenly reduced, so that the constant pressure of the fluid in the space above the smaller piston area brings the piston together with the piston rod and the movable part of the contact arrangement of the switch into the off position.
  • a pneumatic drive for electrical switches is described in assembly and operating instructions No. 457/7126 from 8.70 “Compressed air devices” from Siemens.
  • This drive has a drive piston slidably guided in a drive cylinder and acting on the electrical switch via a piston rod.
  • the drive piston is driven by compressed air, which is fed to the drive cylinder from a compressed air source via an open inlet valve.
  • the drive piston is moved in the opposite direction by a tensioned switch-off spring.
  • air in the drive cylinder is pushed out by a pneumatically controlled outlet valve. If the drive piston covers the outlet opening of the outlet valve during the switch-off stroke, part of the air escapes through the inlet valve.
  • This drive requires a latching device that holds the drive piston in the switched-on position against the force of the switch-off spring. Such a latching device is complex and prone to failure.
  • Fig. 7e shows the circuit diagram of a pneumatic drive for electrical switches of type DM 825, DM 835.
  • the invention solves the problem of specifying a drive of the type mentioned, the shut-off valve arrangement can be kept small.
  • the drive according to the invention can be designed to be extremely inexpensive since the shut-off valve arrangement manages with a comparatively small outflow cross-section. This is due to the fact that the at least one shut-off valve of the shut-off valve arrangement which initiates the start of the drive when the shut-off need only be dimensioned for actuating the changeover valve.
  • the drive shown in FIG. 1 has a piston rod 12 attached to the piston 16 of a piston-cylinder arrangement 14.
  • the piston 16 located inside the arrangement 14 divides a cylinder space 18 into two spaces 20 and 22.
  • the space 20 is penetrated by the piston rod 12 and is located above the smaller area of the piston 16, whereas the space 22 covers the dimension of the entire area of the piston.
  • the piston 16 acts as a differential piston.
  • the space 20 above the smaller piston surface is connected to a hydraulic high-pressure accumulator 24 via a line 26 to which a further line 28 is connected, which on the one hand connects to an input 30 of a changeover valve 32 designed as a three / two-way valve with a control member 33 is switched.
  • the outlet 34 of the valve 32 is connected via a line 36 to the space 22 above the larger piston area.
  • the second outlet 38 of the valve 32 is connected to a low-pressure tank 46 via a line 40, 42 and 44.
  • the inlet 58 of a controllable valve 56 is connected to the line 36, the outlet 60 of this valve is connected to the line 40 and thus via the lines 42 and 44 to the low-pressure container.
  • a branching point 37 denotes a branching point in a connecting line 39 and 63 between the control member 33 and the inputs 65, 67 of electromagnetically actuated cut-off valves 66 and 68. From the branching point 37, a pipeline 61 leads via a timing element designed as an orifice 62 to a control member 57 of the controllable valve 56.
  • a switch-on valve is designated by 64.
  • This drive now acts as follows: When switching off, at least one of the switch-off valves 66, 68 is actuated. As a result, the high fluid pressure in the line 63, 39 and thus also in a pressure relief chamber of the control member 33 is reduced in the switch-on position (cf. the left half of FIG. 1a).
  • the changeover valve 32 is switched due to a differential effect of the control element 33, which is not explained in detail, and the fluid in the space 22, which is under high pressure, begins to flow out into the low-pressure container 46 via the line 36, the valve 32 and the lines 40, 42 and 44.
  • the space 22 is now relieved of pressure and the differential piston 16 is accelerated out of the idle state together with the piston rod 12 and the part of the contact arrangement of the switch attached to it.
  • the piston 16 displaces increasing liquid volumes from the space 22 with increasing speed per unit of time.
  • fluid is also removed from the space 22 via the further controllable valve 56.
  • control element 57 acting as a differential piston, switches over the valve 56, and the fluid in the space 22 can now - in the manner mentioned above - also via the valve 56 and the lines 42 and 44 in FIG Drain low pressure tank 48.
  • a time delay in the actuation of the valve 56 is brought about in that the control element 57 of this valve is connected to the space 22. If the shut-off valves 66 and 68 are actuated, the control member 33 of the changeover valve 32 is first reversed via the lines 63 and 39 and the space 22 is relieved of pressure after the valve 32 has been switched over via the line 36, the valve 32 and the lines 42 and 44. Now the pressure relief chamber of the control member 57 of the valve 56 is relieved and the valve 56 is reversed.
  • a particular advantage of this arrangement is that the fluid in the pressure relief chamber of the control member 57 does not flow out via the shut-off valves 66, 68 but via the line 36 of the reversing valve 32 and the lines 42, 44, and that by connecting the chamber 22 and the pressure relief chamber Control element 57, the delay between the switch-off command and the response of the further controllable valve is practically dimensioned such that this valve responds precisely when the piston begins to move.
  • the embodiment according to FIG. 3 effects a delayed activation of the valve 56 a device 70 which generates a signal indicating the position of the differential piston 16.
  • This signal is preferably given to a control element 57 which responds to this signal by electrical or mechanical means.
  • This embodiment has the advantage that the valve 56 is particularly inexpensive because of the mechanically or electrically actuable control member.

Landscapes

  • Fluid-Pressure Circuits (AREA)
  • Fluid-Driven Valves (AREA)

Claims (5)

1. Système de commande actionné par un fluide sous pression, en particulier pour des appareils électriques de commutation, avec
- un piston actif (16), sous la forme d'un piston différentiel, coulissant dans un cylindre (18),
- une soupape d'inversion (32), à travers laquelle un fluide sous pression peut être introduit dans la chambre (22) située au-dssus de la plus grande surface effective du piston acitf (16) et à travers laquelle le fluide peut être évacué de cette chambre (22) vers un réservoir à basse pression (46),
- une autre soupape réglable (56), qui communique par son entrée (58) avec le chambre (22) située au-dessus de la plus grande surface effective du piston actif (16) et par sa sortie (60) avec le réservoir à basse pression (46) et qui peut être réglée de telle façon que, en coopération avec la soupape d'inversion (32), elle évacue le fluide de la chambre (22) située au-dessus de la plus grande surface effective du piston actif (16) vers le réservoir à basse pression (46), et
- un agencement de soupapes de coupure comportant au moins une soupape de coupure (66, 68) et commandant le mouvement de coupure du système de commande, dans lequel les sorties des soupapes de coupure (66, 68) sont en communication avec le réservoir à basse pression (46) et les entrées communiquent avec les organes de commande (33,57) de la soupape d'inversion (32) et de l'autre soupape réglable (56), caractérisé en ce que la chambre située au-dessus de la plus petite surface du piston actif (16) est soumise en permanence à la pression du fluide et en ce qu'il est prévu des moyens (62) qui assurent que l'autre soupape réglable (56) soit commandée en retard par rapport à la soupape d'inversion (32) de telle sorte que les courants de fluide qui commandent d'une part la soupape d'inversion (32) et d'autre part l'autre soupape réglable (56) traversent les soupapes (66, 68) de l'agencement de soupapes de coupure avec un décalage temporel l'un par rapport l'autre.
2. Système de commande suivant la revendication 1, caractérisé en ce qu'un obturateur (62) est disposé entre l'organe de commande (57) de l'autre soupape réglable (56) et un point de branchement dans une conduite de liaison (39, 63) entre l'organe de commande (33) de la soupape d'inversion (32) et l'entrée (65, 67) de l'agencement de soupapes de coupure.
3. Système de commande actionné par un fluide sous pression, en particulier pour des appareils électriques de commutation, avec
- un piston actif (16), sous la forme d'un piston différentiel, coulissant dans un cylindre (18),
- une soupape d'inversion (32), à travers laquelle un fluide sous pression peut être introduit dans la chambre (22) située au-dessus de la plus grande surface effective du piston actif (16) et à travers laquelle le fluide peut être évacué de cette chambre (22) vers un réservoir à basse pression (46),
- une autre soupape réglable (56), qui communique par son entrée (58) avec la chambre (22) située au-dessus de la plus grande surface effective du piston actif (16) et par sa sortie (60) avec le réservoir à basse pression (46) et qui peut être réglée de telle façon que, en coopération avec la soupape d'inversion (32), elle évacue le fluide de la chambre (22) située au-dessus de la plus grande surface effective du piston actif (16) vers le réservoir à basse pression (46), et
- un agencement de soupapes de coupure comportant au moins une soupape de coupure (66, 68) et commandant le mouvement de coupure du système de commande, dans lequel les sorties des soupapes de coupure (66, 68) sont en communication avec le réservoir à basse pression (46) et les entrées communiquent avec l'organe de commande (33) de la soupape d'inversion (32), caractérisé en ce que la chambre située au-dessus de la plus petite surface du piston actif (16) est soumise en permanence à la pression du fluide et en ce que l'organe de commande (57) assurant la commande de l'autre soupape réglable (56) se trouve en communication avec la chambre (22) située au-dessus de la plus grande surface effective du piston actif (16).
4. Système de commande actionné par un fluide sous pression, en particulier pour des appareils électriques de commutation, avec -
- un piston actif (16), sous la forme d'un piston différentiel, coulissant dans un cylindre (18),
- une soupape d'inversion (32), à travers laquelle un fluide sous pression peut être introduit dans la chambre (22) située au-dessus de la plus grande surface effective du piston actif (16) et à travers laquelle le fluide peut être évacué de cette chambre (22) vers un réservoir à basse pression (46),
- une autre soupape réglable (56), qui communique par son entrée (58) avec la chambre (22) située au-dessus de la plsu grande surface effective du piston actif (16) et par sa sortie (60) avec le réservoir à basse pression (46) et qui peut être réglée de telle façon que, en coopération avec la soupape d'inversion (32), elle évacue le fluide de la chambre (22) située au-dessus de la plus grande surface effective du piston actif (16) vers le réservoir à basse presison (46), et
- un agencement de soupapes de coupure comportant au moins une soupape de coupure (66, 68) et commandant le mouvement de coupure du système de commande, dans lequel les sorties des soupapes de coupure (66, 68) sont en communication avec le réservoir à basse pression (46) et les entrées communiquent avec l'organe de commande (33) de la soupape d'inverison (32), caracéterisé en ce que la chambre située- au-dessus de la plus petite surface du piston actif (16) est soumise en permanence à la pression du fluide et en ce que l'organe de commande (57) assurant la commande de l'autre soupape réglable (56) est actionnée en réponse à un signal émis pour une position déterminée du piston actif (16).
EP19820200143 1981-03-26 1982-02-08 Commande hydraulique ou pneumatique Expired EP0061786B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH204781 1981-03-26
CH2047/81 1981-03-26

Publications (3)

Publication Number Publication Date
EP0061786A1 EP0061786A1 (fr) 1982-10-06
EP0061786B1 EP0061786B1 (fr) 1985-05-15
EP0061786B2 true EP0061786B2 (fr) 1989-09-06

Family

ID=4224692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820200143 Expired EP0061786B2 (fr) 1981-03-26 1982-02-08 Commande hydraulique ou pneumatique

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EP (1) EP0061786B2 (fr)
DE (1) DE3263469D1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3612827A1 (de) * 1986-04-16 1987-10-22 Bbc Brown Boveri & Cie Hydraulischer antrieb fuer ein elektrisches schaltgeraet
DE3915107A1 (de) * 1989-05-09 1990-11-22 Asea Brown Boveri Hydraulischer antrieb
DE4227562A1 (de) * 1992-08-20 1994-02-24 Abb Patent Gmbh Verfahren zum Steuern eines Hydraulikantriebes
DE4340533C2 (de) * 1993-11-29 1998-02-19 Abb Patent Gmbh Hydraulikeinrichtung zur Betätigung eines Antriebskolbens für ein bewegliches Bauteil
RU2147385C1 (ru) * 1998-02-13 2000-04-10 Акционерное общество открытого типа "Научно-исследовательский, проектно-конструкторский институт высоковольтного аппаратостроения" Гидромеханический привод элегазового выключателя
RU2141146C1 (ru) * 1998-04-23 1999-11-10 Российский Федеральный Ядерный Центр - Всероссийский Научно-Исследовательский Институт Экспериментальной Физики Способ контроля и управления гидроприводом
DE10345788A1 (de) * 2003-10-02 2005-04-21 Bayer Materialscience Ag Wässrige Beschichtungsmittel für Can Coating
DE102011106584A1 (de) * 2011-06-16 2012-12-20 Voith Patent Gmbh Vorrichtung zur hydraulischen Betätigung eines Absperrorgans
EP2933816B1 (fr) 2014-04-16 2018-06-13 ABB Schweiz AG Soupape hydraulique destinée à éviter les fuites dans un mécanisme de commande d'un commutateur de puissance à moyenne ou haute tension

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861144A (en) * 1957-07-08 1958-11-18 Gen Electric Stored energy type closing device for an electric circuit breaker
FR1181089A (fr) * 1957-08-12 1959-06-11 Perfectionnements aux circuits hydrauliques de commande
DE1690130C3 (de) * 1968-01-12 1979-02-15 Siemens Ag, 1000 Berlin U. 8000 Muenchen Hydraulischer Antrieb für elektrische Leistungsschalter
FR2308815A1 (fr) * 1975-04-23 1976-11-19 Alsthom Cgee Commande oleopneumatique

Also Published As

Publication number Publication date
EP0061786A1 (fr) 1982-10-06
EP0061786B1 (fr) 1985-05-15
DE3263469D1 (en) 1985-06-20

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