EP0530544B1 - Druckmittelantrieb zum Schliessen und Oeffnen der Kontakte eines Schalters - Google Patents

Druckmittelantrieb zum Schliessen und Oeffnen der Kontakte eines Schalters Download PDF

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Publication number
EP0530544B1
EP0530544B1 EP92113595A EP92113595A EP0530544B1 EP 0530544 B1 EP0530544 B1 EP 0530544B1 EP 92113595 A EP92113595 A EP 92113595A EP 92113595 A EP92113595 A EP 92113595A EP 0530544 B1 EP0530544 B1 EP 0530544B1
Authority
EP
European Patent Office
Prior art keywords
pressure medium
contacts
drive
valve
drive cylinder
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
EP92113595A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0530544A1 (de
Inventor
Henri Duffour
Philippe Goerend
Dominique Loutan
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.)
Secheron SA
Original Assignee
Secheron 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 Secheron SA filed Critical Secheron SA
Publication of EP0530544A1 publication Critical patent/EP0530544A1/de
Application granted granted Critical
Publication of EP0530544B1 publication Critical patent/EP0530544B1/de
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
    • 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
    • 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 is based on a pressure medium drive for opening and closing the contacts of a switch according to the preamble of claim 1.
  • Such a pressure medium drive is known for example from CH-A-343 005.
  • a pressure medium drive is also described in US-A-2,384,801.
  • This pressure medium drive has a piston 17 which is guided in a cylinder 15 and acts on a movable contact of a switch via a piston rod 49 and a linkage 50.
  • the cylinder 15 is supplied with compressed air from an compressed air reservoir connected to a chamber 186 of the changeover valve 21 via an electromagnetically operated changeover valve 21 and a throttle valve 23.
  • the compressed air fed into the cylinder 15 moves the pistons 17 and causes a closing of the contacts and a tensioning of a return spring 52 which causes the contacts to open when switched off.
  • the changeover valve 21 contains an inlet valve 185, via which the compressed air is guided into the cylinder 15 when switched on, and an outlet valve 193, via which when opening the contacts with the inlet valve 185 air removed from the cylinder 15 to the outside.
  • the flow cross sections of the inlet and outlet valves are of approximately the same size and are matched to the time required to close the contacts and to tension the return spring 52. In the event of a short-circuit shutdown, however, the time allowed for opening the contacts is considerably shorter than for closing. Therefore, the pressure medium drive according to the prior art additionally has a further electromagnetically actuated valve 25 with a substantially larger flow cross section than the inlet or outlet valve. This significantly shortens the time it takes to open the contacts. However, such a valve is expensive because of its large flow cross-section.
  • the invention has for its object to provide a pressure medium drive for an electrical switch, which is simple and inexpensive and yet can open the contacts of the switch much faster than it can close. This object is achieved by a pressure medium drive according to claim 1.
  • the pressure medium drive according to the invention additionally has only a simple, preferably electromagnetically actuated ballast valve with a small flow cross section.
  • This series valve controls the changeover valve during a switching operation of the Switch with the pressure medium.
  • the changeover valve can therefore have a substantially larger flow cross-section. Only when the contacts of the switch are closed is pressure medium passed through the series valve and the changeover valve. When the contacts of the switch are opened, on the other hand, pressure medium is only conducted via the changeover valve which has a large flow cross section. The contacts can therefore also be opened without an electromagnetically operated valve with a large flow cross-section, which is provided in addition to the changeover valve. This ensures a rapid escape of pressure medium from the drive cylinder when switching off and thus particularly short switch-off times.
  • the switchover valve can be manufactured in a particularly cost-effective manner, for example by installing a valve body which can be controlled as a function of the flow direction of the pressure medium.
  • the pressure medium drive according to the invention has a control device which changes the flow of the pressure medium through the changeover valve in a simple and reliable manner as a function of the position of the drive piston. As a result, a damped movement of the contacts of the switch is achieved both when switching on and when switching off.
  • the single figure shows a plan view of a pressure medium drive according to the invention, shown schematically and partially in section, when the electrical switch is closed.
  • the pressure medium drive shown in the figure has a drive cylinder c, a multifunction block n and a pressure medium, such as in particular compressed air, from the pressure p containing pressure medium reservoir r, the input of which communicates with a pressure medium source q via a pressure regulator 1, and the output of which is controlled by an electromagnetically actuated ballast valve v can be opened and closed.
  • the multifunction block n is arranged between the series valve v and a chamber a of the drive cylinder c and contains a changeover valve s and a control device h.
  • the chamber a is closed off by a drive piston t guided in the drive cylinder c in a pressure-tight manner.
  • the drive piston t carries an insulating rod i, which is non-positively coupled to a drive mechanism j of the switch.
  • a movable e 1 of two contacts e 1 , e 2 of the switch is non-positively connected to the drive mechanism j.
  • the movable contact e 1 rests on a stationary e 2 of the two contacts e 1 , e 2 with a contact force that produces a pressure p 1 .
  • the drive piston t and the movable contact e 1 are held in the switch-on position by a latch containing an electromagnetic coil m.
  • the latch is continuously subjected to the force of a spring g, which is supported at one end on the drive cylinder c and at the other end on a part k rigidly connected to the insulating rod i.
  • a spring g which is supported at one end on the drive cylinder c and at the other end on a part k rigidly connected to the insulating rod i.
  • the prestressed spring g then presses the drive piston t against the bottom of the drive cylinder c and holds the drive piston t and thus also the movable contact e 1 in a defined position.
  • the changeover valve s has a valve body w which can be controlled as a function of the flow direction of the pressure medium passing through.
  • This valve body w is slidably guided in a bore x of the changeover valve s.
  • the bore x communicates with the ballast valve v and is connected via lines b 1 , b 2 to the drive cylinder c and via a quick outlet opening u to an outlet volume, for example atmosphere, for receiving used pressure medium.
  • the valve body w has an edge area designed in the manner of sealing lips y, which depending on the direction of flow of the pressure medium when the contacts e 1 , e 2 are closed at the quick outlet opening u (FIG. 1 ) and when the contacts are opened at the wall of the bore x (dashed representation of the valve body w in the figure) is pressed.
  • the control device h has an organ which changes the flow cross-section of the lines b 1 , b 2 .
  • This organ is formed by a rod d, which is non-positively connected to the drive piston t via the part k and the insulating rod i.
  • the rod d is guided in a chamber o. It throttles the flow cross-section of lines b 1 , b 2 in the switch-off position ( Figure), ie when contacts e 1 , e 2 are open.
  • the control device h also has a gap f which, in the switch-off position, connects the chamber o to the outlet volume for receiving used pressure medium.
  • pressure medium such as preferably compressed air
  • pressure regulator 1 which stabilizes the pressure p of the pressure medium in the pressure medium reservoir r.
  • the ballast valve v is first opened. Pressure medium from the pressure p now flows from the pressure medium reservoir r via the ballast valve v into the bore x of the changeover valve s. This pressure medium flow guides the valve body w against the quick exhaust port u. The edge region of the valve body w, designed in the manner of sealing lips y, is pressed against the outlet volume u against the outlet volume by the pressure building up in the bore x, with complete sealing. The pressure medium is fed through line b 1 , chamber o and line b 2 into chamber a of drive cylinder c.
  • the rod d Inserted into the chamber o throttles the flow cross-section of the chamber o.
  • the pressure medium passed through the chamber o slowly moves the drive piston t upwards.
  • the movable contact e 1 is simultaneously displaced, the spring g is charged and the rod d is removed from the chamber o with a constant increase in the flow cross section.
  • the drive piston t now moves at a constant speed.
  • the movable contact e 1 comes into contact with the fixed contact e 2 , forming a contact force p 1, and the drive piston t and thus also the movable contact e 1 are latched by the electromagnetic force of the coil m.
  • the ballast valve v is closed. Since the bore x has a very small volume in relation to the chamber a, the pressure of the pressure medium in the bore x which decreases via the gap f drops much more rapidly than in that of the chamber a of the drive cylinder c. As a result, the elastically deformed sealing lips y of the valve body w rise from the quick-release opening u and pressure medium now flows from the bore x into the quick-release opening u Outlet volume from. The pressure medium flow from the chamber a of the drive cylinder c now leads the sealing lips y to the wall of the bore x and shifts the valve body w completely to the left (shown in dashed lines in the figure).
  • the pressure medium in chamber a is very quickly removed into the outlet volume via the changeover valve s, which is now fully open and has a large flow cross-section, and the quick outlet opening u. This ensures that the switch is ready for a quick switch-off in an extremely short time without an additional switch-off valve.
  • the latching is first released by de-excitation of the electromagnetic coil m. Due to the force of the charged spring g, the drive piston t and the movable contact e 1 move into the switch-off position. Pressure medium of atmospheric pressure still remaining in the chamber a escapes via the line b 2 , the chamber o, the line b 1 , the bore x and the quick-release opening u into the outlet volume which is at atmospheric pressure. Towards the end of the stroke movement of the drive piston t, the rod d penetrates into the chamber o and throttles the flow cross-section of the lines b 1 , b 2 . This effectively dampens the movement of the drive piston t and thus also of the contact e 1 .

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Magnetically Actuated Valves (AREA)
  • Push-Button Switches (AREA)
  • Fluid-Driven Valves (AREA)
  • Multiple-Way Valves (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
EP92113595A 1991-09-06 1992-08-10 Druckmittelantrieb zum Schliessen und Oeffnen der Kontakte eines Schalters Expired - Lifetime EP0530544B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2632/91 1991-09-06
CH2632/91A CH684969A5 (fr) 1991-09-06 1991-09-06 Dispositif de commande actionné par un fluide sous pression notamment pour la fermeture et l'ouverture des contacts d'un disjoncteur.

Publications (2)

Publication Number Publication Date
EP0530544A1 EP0530544A1 (de) 1993-03-10
EP0530544B1 true EP0530544B1 (de) 1997-05-07

Family

ID=4238131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113595A Expired - Lifetime EP0530544B1 (de) 1991-09-06 1992-08-10 Druckmittelantrieb zum Schliessen und Oeffnen der Kontakte eines Schalters

Country Status (14)

Country Link
US (1) US5298702A (ja)
EP (1) EP0530544B1 (ja)
JP (1) JPH05211017A (ja)
KR (1) KR100262990B1 (ja)
CN (1) CN1029358C (ja)
AT (1) ATE152856T1 (ja)
CH (1) CH684969A5 (ja)
CZ (1) CZ281378B6 (ja)
DE (1) DE59208449D1 (ja)
DK (1) DK0530544T3 (ja)
ES (1) ES2106110T3 (ja)
HU (1) HU216206B (ja)
PL (1) PL170397B1 (ja)
RU (1) RU2039388C1 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5986909A (en) * 1998-05-21 1999-11-16 Robicon Corporation Multiphase power supply with plural series connected cells and failed cell bypass
WO2009012788A1 (en) * 2007-07-20 2009-01-29 Abb Technology Ag Breaker with a gas drive for low-voltage, medium-voltage and high-voltage switching devices
CN103325613B (zh) * 2013-07-04 2015-09-30 国网浙江省电力公司嵊泗县供电公司 一种真空断路器
KR101322220B1 (ko) * 2013-08-26 2013-10-28 우남전력 ㈜ 지연 차단 방지를 위한 듀얼 전자변 기반의 초고압 선로 차단 시스템
CN108533762A (zh) * 2018-06-15 2018-09-14 浙江威腾阀门有限公司 高温高压电磁阀
CN109077880B (zh) * 2018-09-21 2020-04-21 贵州省习水县人民医院 一种医疗护理推车
CN111968878B (zh) * 2020-08-04 2022-06-28 北京中车赛德铁道电气科技有限公司 一种轨道交通用真空断路器动作机构气动控制装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE258804C (ja) * 1900-01-01
GB524729A (en) * 1939-02-06 1940-08-13 Gen Electric Co Ltd Improvements in or relating to power operating mechanism applicable, for example, to electric switchgear
US2381307A (en) * 1942-06-05 1945-08-07 Westinghouse Electric Corp Circuit breaker
US2384801A (en) * 1942-06-05 1945-09-18 Westinghouse Electric Corp Circuit breaker
US2730590A (en) * 1953-03-02 1956-01-10 Allis Chalmers Mfg Co Fluid motor dumping system with fluid admitting and venting valve
CH343005A (de) * 1954-01-29 1959-12-15 Uhde Gmbh Friedrich Vorrichtung zur selbsttätigen Steuerung hochbelastbarer Schaltkontakte
FR1135122A (fr) * 1955-11-04 1957-04-24 Jean Louis Gratzmuller Dispositif de commande hydraulique à contrôle de vitesse, pour disjoncteur
FR1423813A (fr) * 1964-11-20 1966-01-07 Valve de purge rapide
FR2193242B1 (ja) * 1972-07-13 1977-05-13 Siemens Ag
DE2234812B2 (de) * 1972-07-13 1975-08-21 Siemens Ag, 1000 Berlin Und 8000 Muenchen Hydraulische Betätigungsvorrichtung für einen elektrischen Schalter
CH646009A5 (de) * 1979-11-01 1984-10-31 Bbc Brown Boveri & Cie Hydraulischer antrieb fuer elektrische schalter.
FR2547108B1 (fr) * 1983-05-30 1986-07-04 Gratzmuller Claude Commande oleopneumatique pour disjoncteurs electriques
CH674102A5 (ja) * 1986-05-20 1990-04-30 Mitsubishi Electric Corp

Also Published As

Publication number Publication date
US5298702A (en) 1994-03-29
CN1029358C (zh) 1995-07-19
HUT69200A (en) 1995-08-28
KR100262990B1 (ko) 2000-08-01
CH684969A5 (fr) 1995-02-15
HU9202854D0 (en) 1992-12-28
CZ271792A3 (en) 1993-03-17
HU216206B (hu) 1999-05-28
DK0530544T3 (da) 1997-11-03
KR930006770A (ko) 1993-04-21
EP0530544A1 (de) 1993-03-10
ATE152856T1 (de) 1997-05-15
CN1070284A (zh) 1993-03-24
CZ281378B6 (cs) 1996-09-11
DE59208449D1 (de) 1997-06-12
JPH05211017A (ja) 1993-08-20
PL295803A1 (en) 1993-04-19
ES2106110T3 (es) 1997-11-01
PL170397B1 (pl) 1996-12-31
RU2039388C1 (ru) 1995-07-09

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