EP0016720B1 - Druckgasschalter - Google Patents

Druckgasschalter Download PDF

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Publication number
EP0016720B1
EP0016720B1 EP80730008A EP80730008A EP0016720B1 EP 0016720 B1 EP0016720 B1 EP 0016720B1 EP 80730008 A EP80730008 A EP 80730008A EP 80730008 A EP80730008 A EP 80730008A EP 0016720 B1 EP0016720 B1 EP 0016720B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
annular piston
contact system
gas
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
EP80730008A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0016720A1 (de
Inventor
Marin Heiner
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT80730008T priority Critical patent/ATE988T1/de
Publication of EP0016720A1 publication Critical patent/EP0016720A1/de
Application granted granted Critical
Publication of EP0016720B1 publication Critical patent/EP0016720B1/de
Expired 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas

Definitions

  • the invention relates to a gas pressure switch with a blowing device consisting of an annular piston and a movable cylinder and assigned to the contact system, the annular piston sealing via a sealing ring on the one hand against the cylinder and on the other hand against the movable cylindrical switching element of the contact system arranged coaxially within the cylinder and with a check valve that is closed during the pressure phase and open during the suction phase.
  • the check valve is formed by openings arranged in the end face of the ring piston, which are closed by a spring-loaded ring.
  • the force of the valve springs is supported during the pressure phase; the openings are kept closed.
  • the force of the valve springs is overcome during the suction phase; the openings are then released.
  • the invention has for its object to provide a gas pressure switch of the type mentioned, in which a simplified space-saving valve construction is created for the check valve of the blowing device, wherein the radial forces exerted on the sealing rings of the annular piston during the actuation of the blowing device are evenly distributed.
  • the check valve is formed by the two sealing rings lying in a plane running transversely to the direction of movement of the cylinder and the switching element, which are arranged with axial play in annular grooves of the annular piston in the course of flow paths for the compressed gas and together with interposed spacers are slidably mounted transversely to the axis of the annular piston.
  • a pressure gas switch is known from DE-A1-2 538 132, in which the sealing rings are arranged in a plane running transversely to the piston axis and are supported on the one hand on the blow cylinder and on the other hand on the movable cylindrical contact piece of the contact system. In the known embodiment, however, no check valve is provided.
  • a check valve formed by a piston ring is known from DE-A1-2 541 851, in which the piston ring is arranged in an encircling annular groove of the piston with axial play and is axially spring-loaded and closes recesses in the piston connecting the pressure side with the suction side under the spring load .
  • the cylinder is connected to the piston in a pressure-tight manner in the conveying direction, this pressure-tight connection being canceled in the opposite direction to the conveying direction.
  • both sealing rings of an annular piston are designed as a movable valve member of a check valve, which are displaceable relative to the annular piston by means of the interposed spacer elements.
  • the sealing rings are thus mounted without radial forces.
  • one of two fixed switching pieces serves as a rigid guide for the blowing cylinder and the bypass switching element. Since the annular piston arranged between the bypass switching element and the blowing cylinder is also rigidly held, the joint displaceability of the two rings in the radial direction precludes a static overdetermination of the guide parts.
  • a compressed gas circuit breaker in the manner of a blown piston switch is shown schematically in a longitudinal section, the switch-on position being drawn to the right of the center line and the switch-off position to the left of the center line.
  • a switching chamber 1 made, for example, of porcelain, two hollow tubular switching elements 3, 4 are arranged at a distance in one axis in the gas-filled interior 2, for example with an SF 6 filling under a pressure of 6 bar.
  • the distance A between the end faces of the contact pieces 3, 4 forms the isolating path of the switch in the switched-off state.
  • the two contact pieces 3, 4 are bridged by a movable contact piece 5, which is tubular and contains a plurality of spring-loaded contact plates 6 distributed uniformly over the circumference.
  • the movable contact piece 5 is mechanically connected to a blow cylinder 7, which is moved in the direction of arrow 9 when the switch is transferred from the switch-on position shown on the right of the center line to the switch-off position shown on the left of the center line.
  • the blowing cylinder 7 is pulled over a relatively fixed annular piston 8, which compresses the extinguishing and insulating agent contained in the cylinder space 7a until it becomes effective after the contact separation to extinguish the arc.
  • the annular piston 8 has two sealing rings 10, 11 arranged in one plane, which are arranged axially displaceably in annular grooves 12, 13.
  • the annular grooves lie in flow paths 14, which are the suction and pressure sides of the annular piston 8 Connect in the position shown on the right of the center line.
  • the flow paths 14 are closed by the sealing rings 10, 11 in the position drawn to the left of the center line.
  • the two sealing rings are mounted displaceably free of lateral forces transversely to the axis of the piston with the interposition of spacer elements 15.
  • a cylindrical coil spring is provided as a spacer.
  • cylindrical bolts that keep the piston rings at a distance.
  • bolts and coil springs together as spacer elements.
  • the coil springs are supported on the two sealing rings 10 and 11 under pressure. All types of spacers are radially displaceable in the piston.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Organic Insulating Materials (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Steroid Compounds (AREA)
  • Check Valves (AREA)
  • Multiple-Way Valves (AREA)
EP80730008A 1979-02-27 1980-02-06 Druckgasschalter Expired EP0016720B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80730008T ATE988T1 (de) 1979-02-27 1980-02-06 Druckgasschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792907691 DE2907691A1 (de) 1979-02-27 1979-02-27 Druckgasschalter
DE2907691 1979-02-27

Publications (2)

Publication Number Publication Date
EP0016720A1 EP0016720A1 (de) 1980-10-01
EP0016720B1 true EP0016720B1 (de) 1982-05-05

Family

ID=6064051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80730008A Expired EP0016720B1 (de) 1979-02-27 1980-02-06 Druckgasschalter

Country Status (8)

Country Link
US (1) US4293750A (enrdf_load_stackoverflow)
EP (1) EP0016720B1 (enrdf_load_stackoverflow)
JP (1) JPS55119327A (enrdf_load_stackoverflow)
AT (1) ATE988T1 (enrdf_load_stackoverflow)
BR (1) BR8001112A (enrdf_load_stackoverflow)
DE (2) DE2907691A1 (enrdf_load_stackoverflow)
MX (1) MX146930A (enrdf_load_stackoverflow)
ZA (1) ZA801099B (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH661144A5 (de) * 1983-10-28 1987-06-30 Bbc Brown Boveri & Cie Hochspannungsleistungsschalter.
FR2573912B1 (fr) * 1984-11-26 1987-01-09 Telemecanique Electrique Interrupteur electrique a ecran
DE8804108U1 (de) * 1988-03-23 1988-05-19 Siemens AG, 1000 Berlin und 8000 München Druckgasschalter
JPH06172828A (ja) * 1992-12-04 1994-06-21 Kobe Steel Ltd 粉体切出継手
DE19629475A1 (de) * 1996-07-10 1998-01-15 Siemens Ag Druckgasleistungsschalter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH556602A (de) * 1973-01-12 1974-11-29 Sprecher & Schuh Ag Druckgasschalter.
DE2411897A1 (de) * 1974-03-12 1975-09-18 Siemens Ag Anordnung zur loeschung eines lichtbogens in einem gasstroemungsschalter
DE2438017C3 (de) * 1974-08-05 1981-07-02 Siemens AG, 1000 Berlin und 8000 München Druckgasschalter
US4139751A (en) * 1975-09-25 1979-02-13 Westinghouse Electric Corp. Puffer-type compressed-gas circuit interrupter
NL7607487A (nl) * 1975-08-07 1977-02-09 Westinghouse Electric Corp Drukgasschakelaar van het blaastype.
DE2538132C3 (de) * 1975-08-25 1978-12-14 Siemens Ag, 1000 Berlin Und 8000 Muenchen Druckgasschalter
DE2541851A1 (de) * 1975-09-17 1977-03-24 Siemens Ag Aus kolben und zylinder bestehende foerderpumpe
DE2741357C3 (de) * 1977-09-12 1981-01-29 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektrischer Druckgasschalter

Also Published As

Publication number Publication date
JPS55119327A (en) 1980-09-13
BR8001112A (pt) 1980-10-29
EP0016720A1 (de) 1980-10-01
ZA801099B (en) 1981-03-25
MX146930A (es) 1982-09-08
DE2907691A1 (de) 1980-09-04
ATE988T1 (de) 1982-05-15
DE7905497U1 (de) 1983-06-30
US4293750A (en) 1981-10-06
JPS6252412B2 (enrdf_load_stackoverflow) 1987-11-05
DE2907691C2 (enrdf_load_stackoverflow) 1987-09-17

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