EP0451724B1 - Commande hydraulique - Google Patents

Commande hydraulique Download PDF

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Publication number
EP0451724B1
EP0451724B1 EP91105423A EP91105423A EP0451724B1 EP 0451724 B1 EP0451724 B1 EP 0451724B1 EP 91105423 A EP91105423 A EP 91105423A EP 91105423 A EP91105423 A EP 91105423A EP 0451724 B1 EP0451724 B1 EP 0451724B1
Authority
EP
European Patent Office
Prior art keywords
drive
cylinder
pot
pressure
end piece
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 - Lifetime
Application number
EP91105423A
Other languages
German (de)
English (en)
Other versions
EP0451724A2 (fr
EP0451724A3 (en
Inventor
Edelwald Lutz
Horst Plettner
Volker Dr. Rees
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0451724A2 publication Critical patent/EP0451724A2/fr
Publication of EP0451724A3 publication Critical patent/EP0451724A3/de
Application granted granted Critical
Publication of EP0451724B1 publication Critical patent/EP0451724B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H33/022—Details particular to three-phase circuit breakers
    • 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
    • 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
    • H01H33/022—Details particular to three-phase circuit breakers
    • H01H2033/024—Details particular to three-phase circuit breakers with a triangular setup of circuit breakers

Definitions

  • the invention relates to a hydraulic drive according to the preamble of claim 1.
  • the object of the invention is to combine the drive units for the individual switch poles in a compact drive block with a central energy store.
  • the block construction enables in particular short and equally long hydraulic supply routes from the energy store to the individual drive cylinders, which ensures the desired simultaneity of an all-pole switching operation.
  • the assembly effort is reduced if the wall of the pot part is used to form the central pressure cylinder or the cylinder housing.
  • a preferred embodiment is to design the pressure cylinder as an axially symmetrical part which protrudes from the bottom of the pot in the form of a dome. Pot part with integrated pressure cylinder can thus be made from a single casting and form a turned part. This means that only a few individual parts are needed for the drive.
  • the fluid lines are also expediently integrated into the wall of the pot part.
  • the radial section of the pot base is designed to form such fluid lines with a correspondingly large wall thickness; likewise the wall of the printing cylinder opposite the respective drive cylinder, which receives a line running parallel to the printing cylinder. It is advisable to arrange the drive cylinders to be flanged to the bottom of the pot evenly over the entire circumference - at a distance of 120 ° - so that hydraulic paths with the same pipe losses are created.
  • the drive cylinders and their housings are arranged so that the respective cylinder head distant from the bottom of the pot is penetrated by the piston rod and the opposite cylinder opening can be connected to a control line in the bottom of the pot.
  • the head end of the drive cylinder requires a permanent connection of a pressure fluid line.
  • this is designed as a line arm which is integrally formed on the cylinder housing and is guided at an angle to the axis of the drive cylinder in the direction of the center of the pot bottom. This further reduces the number of individual parts and gives the drive block mechanical stability.
  • the entire drive block is housed in a cylindrical housing 1, which is closed by a cover element 2 with a raised support platform 3 which projects into the interior of the housing.
  • the opposite side of the housing is extended by an intermediate flange housing 4, via the outer flange 5 of the drive, for. B. is coupled to a metal-enclosed, gas-insulated switchgear.
  • the hood-shaped pot part 6 receiving the storage spring is tightly fastened to the support platform 3. It essentially consists of the pot base 7 and the adjoining cylinder walls 8.
  • the spring 9, which acts as an energy store and consists of a plate spring package, is accommodated within the pot part.
  • the spring 9 is supported on the one hand on the support platform 3, and on the other hand on the base of a storage piston 10 opposite the platform, which slides in a pressure cylinder 11.
  • the latter is incorporated into the pot bottom 7 of the pot part 6 and formed by the wall thereof. It jumps out of the pot bottom 7 as an axially symmetrical, dome-shaped structure (see FIG. 3).
  • the pot part 6 enclosing the storage spring thus simultaneously forms the pressure cylinder; it is expediently manufactured as a casting and can be machined as a turned part.
  • the drive housing 13 with the drive cylinders 14 are flanged onto the ring section 12 formed between the pressure cylinder 11 and the periphery of the pot base 7.
  • the three drive cylinders for the three poles of a circuit breaker keep the same distance from the central pressure cylinder 11. They keep a distance of 120 ° from one another (see FIG. 3). This means that all individual drives can be executed with completely identical paths for the control or pressure fluid and synchronous drive processes can be achieved.
  • a working piston 15 designed as a differential piston slides, whose piston rod 16, which points away from the pot bottom 7, penetrates the cylinder head 17 to the outside and is coupled via a linkage 18 to the switch pole 19 or its movable contact piece.
  • the other side of the working piston 15 contains a damping pin 20 and is connected to the control line 22 leading to a changeover valve 21.
  • a high-pressure line 23 also leads to the changeover valve, which leads directly into the pressure cylinder 11 via a fluid passage 28, which runs parallel to the pressure cylinder 11 and an outlet 24.
  • a low-pressure line 25 connects the interior of the hood-shaped pot part 6, which is designed as a low-pressure chamber, to the changeover valve 21.
  • the pot part 6 is at least in the areas in which the drive housing 13 is flanged with such a wall thickness that the fluid lines 22, 23 and 25 and the fluid passage 28 can be guided through them.
  • the latter is connected to the end of the drive cylinder 14 via a hollow conduit arm 29, which is cast on the drive housing 13 and to which the smaller piston surface, reduced by the piston rod 16, faces.
  • the line arm 29 has its own flange at its free end and is guided at an angle to the axis of the drive cylinder 14 - further towards the center of the pot base 7.
  • the individual working pistons 15 are in the lower position near the pot bottom.
  • the control line 22 is connected to the low-pressure line 25 via the changeover valve 21.
  • the changeover valve 21 is reversed by an electromagnet and connects the control line 22 to the high-pressure line 23 while simultaneously shutting off the low-pressure line 25 (see FIG. 2).
  • the working piston 15 is now under high pressure on both sides and is driven to move from the large to the smaller piston area until it reaches the piston head 17. In this position, the switching pieces of the switch poles 19 are closed.
  • the individual switching positions are indicated by a switching position disc 49, which is driven by a driver 30 of the piston rod 16. It protrudes somewhat from the contour of the intermediate flange housing 4 and is covered by a transparent window 31.
  • the pressure accumulator is automatically reloaded.
  • e.g. B. tapped the path of the accumulator piston 10 via a limit switch 32 and the pump motor 33 are put into operation.
  • This conveys bubble-free fluid from the low-pressure space, which is brought in through an inlet 34, via a check valve 35 into the inlet line 36, which in turn is connected to the high-pressure line 23 and thus to the interior of the pressure cylinder 11.
  • a valve 37 in the accumulator piston 10 protects the high pressure system against overload. It is actuated by a rigid plunger 38 which projects into a bore in the storage piston if the piston exits the pressure cylinder 11 too far. This clears a path from the underside of the storage piston 10 to its upper side (pressure side).
  • Each of the three individual drives can be operated independently.
  • z. B. Auxiliary switch 39 required for each individual drive. Their drive is made dependent on the movement of the individual piston rods.
  • the linkage 18 carries a bridge element 40, on which a coupling rod 41 is articulated, which actuates the respective auxiliary switch 39 via a crank 42.
  • the bridge element 40 receives additional protection against rotation by a fixed guide rod 43, on which it slides - in a bushing 44 of the bridge element.
  • the working piston 15 can be blocked in its switched-on position if there is no fluid pressure.
  • a locking spring 45 pushes the locking pin 46 into a circumferential groove of the working piston.
  • FIG. 3 clearly shows how the individual drive housings 13 are fixed to the pot base 7 via flanges 47.
  • the line arms 29 formed on the housing 13, on the other hand, are fastened with their connecting flanges 48 to the central pressure cylinder projecting from the base 7 of the pot.

Landscapes

  • Actuator (AREA)

Claims (9)

  1. Dispositif de commande hydraulique, destiné notamment à des disjoncteurs de puissance à haute tension, comportant une partie cuve (6) en forme de coiffe qui contient un ressort (9) formant accumulateur d'énergie ainsi qu'un piston (10) qui est sollicité par ledit ressort et coopère avec un cylindre (11), lequel cylindre est connecté à un vérin de commande (14) qui est associé à un pôle (19) du disjoncteur et dont le piston (15) est réalisé sous forme de piston différentiel sollicité par la pression sur l'une de ses faces et dont l'autre face est soumise de manière sélective à une pression aux fins d'exécuter une action de commutation, caractérisé par l'agencement d'un cylindre (11) central qui est usiné directement dans la paroi du fond (7) de la partie cuve (6) ou est rapporté sur celle-ci, plusieurs vérins de commande (14) pour les différents pôles (19) de disjoncteur étant disposés sur la face extérieure du fond (7) de la cuve à distance constante du cylindre (11).
  2. Dispositif de commande selon la revendication 1, caractérisé par le fait que le cylindre (11) qui est disposé avec symétrie radiale fait saillie verticalement sur le fond (7) de la cuve en tant que partie de la paroi dudit fond.
  3. Dispositif de commande selon la revendication 1 ou la revendication 2, caractérisé par le fait que les trois vérins de commande (14) fixés sur le fond (7) de la cuve sont répartis de manière régulière sur la circonférence et forment les sommets d'un triangle équilatéral.
  4. Dispositif de commande selon l'une des revendications 1 à 3, caractérisé par le fait qu'un tronçon de conduite (29) est formé d'une pièce sur le vérin de commande (14) aux fins d'amener le fluide de pression, lequel tronçon de conduite débouche dans l'extrémité côté tige de piston du vérin de commande (14) et est pourvu à son extrémité libre d'une bride de connexion (48).
  5. Dispositif de commande selon la revendication 4, caractérisé par le fait que le tronçon de conduite (29) est incliné par rapport à l'axe du vérin de commande (14) et mène vers le centre du fond de la cuve.
  6. Dispositif de commande selon l'une des revendications 1 à 5, caractérisé par le fait qu'une unité de commande et de surveillance composée par exemple de bobines de déclenchement, de commutateurs auxiliaires, de valves hydrauliques, est associée à chacun des vérins de commande (14) en vue d'un fonctionnement autonome.
  7. Dispositif de commande selon l'une des revendications 1 à 6, caractérisé par le fait qu'un passage de fluide (28) axial est aménagé dans la partie de paroi du cylindre (11) située en regard de chaque vérin de commande (14) concerné et que d'autres conduites de fluide (22, 23, 25) sont usinées dans la partie annulaire (12) du fond (7) de la cuve, dans la région du vérin de commande.
  8. Dispositif de commande selon l'une des revendications 1 à 7, caractérisé par le fait qu'un réservoir (26) à basse pression est disposé entre deux vérins de commande (14), lequel réservoir communique avec l'intérieur de la partie cuve (6) en forme de coiffe.
  9. Dispositif de commande selon l'une des revendications 1 à 8, caractérisé par le fait qu'au moins la partie cuve (6) en forme de coiffe pourvue du cylindre (11) central formant saillie dans la direction axiale se compose d'une pièce moulée unique.
EP91105423A 1990-04-09 1991-04-05 Commande hydraulique Expired - Lifetime EP0451724B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4011445A DE4011445A1 (de) 1990-04-09 1990-04-09 Hydraulischer antrieb
DE4011445 1990-04-09

Publications (3)

Publication Number Publication Date
EP0451724A2 EP0451724A2 (fr) 1991-10-16
EP0451724A3 EP0451724A3 (en) 1992-09-23
EP0451724B1 true EP0451724B1 (fr) 1995-02-08

Family

ID=6404066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91105423A Expired - Lifetime EP0451724B1 (fr) 1990-04-09 1991-04-05 Commande hydraulique

Country Status (2)

Country Link
EP (1) EP0451724B1 (fr)
DE (2) DE4011445A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4210368A1 (de) * 1992-03-30 1993-10-07 Abb Patent Gmbh Hochspannungsschaltfeld
DE4340142C2 (de) * 1993-11-25 1995-11-23 Abb Patent Gmbh Hydraulikeinrichtung zur Betätigung wenigstens eines linear beweglichen Bauteils
DE19637052A1 (de) * 1996-09-12 1998-03-19 Abb Patent Gmbh Hydraulischer Antrieb
DE19637051A1 (de) * 1996-09-12 1998-03-19 Abb Patent Gmbh Hydraulischer Antrieb
DE102008035871B4 (de) 2008-08-01 2011-03-24 Abb Technology Ag Nockenscheibe und Federwegschalter für einen Federspeicherantrieb sowie Federspeicherantrieb
US8736288B2 (en) * 2011-05-16 2014-05-27 Teradyne, Inc. Liquid cooling during testing

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1155513B (de) * 1957-03-19 1963-10-10 Siemens Ag Druckluftantriebsystem fuer elektrische Schalter und Schuetze
US3075060A (en) * 1957-10-30 1963-01-22 Westinghouse Electric Corp Circuit interrupters
ES406076A1 (es) * 1972-08-24 1975-08-16 Garcia Garcia Conjunto tensor hidraulico central con brazos radiales ten-sores multiples.
DE3408909A1 (de) * 1984-03-10 1985-09-12 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Hydraulischer antrieb
DE3718869A1 (de) * 1987-06-05 1988-12-22 Asea Brown Boveri Hydraulischer antrieb fuer ein hochspannungsschaltgeraet
DE3611501A1 (de) * 1986-04-05 1987-10-08 Bbc Brown Boveri & Cie Antrieb zur erzeugung einer linearen bewegung fuer einen verbraucher
DE3709988A1 (de) * 1987-03-26 1988-10-06 Bbc Brown Boveri & Cie Hydraulischer oder pneumatischer antrieb zur betaetigung des beweglichen schaltkontaktes eines mittel- und/oder hochspannungs-leistungsschalters

Also Published As

Publication number Publication date
EP0451724A2 (fr) 1991-10-16
DE59104524D1 (de) 1995-03-23
DE4011445A1 (de) 1991-10-10
EP0451724A3 (en) 1992-09-23
DE4011445C2 (fr) 1993-02-25

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