EP0310538A1 - Disjoncteur électrique de puissance à haute tension - Google Patents

Disjoncteur électrique de puissance à haute tension Download PDF

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Publication number
EP0310538A1
EP0310538A1 EP88730209A EP88730209A EP0310538A1 EP 0310538 A1 EP0310538 A1 EP 0310538A1 EP 88730209 A EP88730209 A EP 88730209A EP 88730209 A EP88730209 A EP 88730209A EP 0310538 A1 EP0310538 A1 EP 0310538A1
Authority
EP
European Patent Office
Prior art keywords
fork head
piston rod
circuit breaker
thread
fork
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
Application number
EP88730209A
Other languages
German (de)
English (en)
Other versions
EP0310538B1 (fr
Inventor
Helmut Beier
Joaquin-Conrado Bohrdt
Joachim Gericke
Klaus Schuler
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
Publication of EP0310538A1 publication Critical patent/EP0310538A1/fr
Application granted granted Critical
Publication of EP0310538B1 publication Critical patent/EP0310538B1/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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle

Definitions

  • the invention relates to an electrical high-voltage circuit breaker, the movable switching elements arranged in interrupter units carried by support insulators are actuated by a hydraulic drive via a switching rod made of insulating material and a deflecting gear located at ground potential, the piston rod, penetrating a seal, being guided out of the hydraulic cylinder and is connected to the deflection gear via a coupling rod via a coupling rod via a coupling rod, and in which the piston rod is screwed into a thread of the fork head and the coupling rod is fixed in the fork attachments of the fork head by means of a cross bolt is.
  • Such a design of an electrical high-voltage circuit breaker is common and is known in particular from DE-AS 29 13 379.
  • the piston rod emerging from the hydraulic cylinder moves back and forth. You must transmit the driving force via the clevis and the coupling rod to the reversing gear, which is connected to the shift rod.
  • the fork head is stressed both by axial forces and by transverse forces, ie radially directed forces.
  • a protective tube is provided, the length of which is dimensioned such that the fork head connected to the piston rod, even in the extended state (ON position of the switch), is provided with its guide ring, the end facing the piston rod remains in the protective tube.
  • the invention has for its object to design the fork head so that it can absorb the forces occurring during switching without difficulty, is easy to manufacture and exactly adjustable relative to the piston rod.
  • the guide ring is in a close fit to the inside diameter of the protective tube end face ring approach of the fork head, this ring approach is separated by a constriction from the area with the thread of the piston rod and in the area of the thread there are longitudinal slots which can be bridged by clamping screws.
  • the guide ring in the ring shoulder of the fork head with the close fit to the inside diameter of the protective tube results in a bearing point for the piston rod and the fork head, at which the lateral force component of the forces transmitted by the deflection gear acting as crank mechanism to the fork head is absorbed. Therefore, the piston rod is only loaded with axial forces, which relieves the seals in the hydraulic cylinder through which the piston rod is guided. Since a constriction is also provided between the ring shoulder and the thread in the fork head into which the piston rod is screwed in, the part of the fork head facing the deflecting gear acts like a soft spiral spring with a certain elasticity, so that the guide ring rests firmly against the inner one The outer surface of the protective tube is not affected. This is also supported by the longitudinal slots in the area of the thread.
  • the adjustment of the piston rod to the deflection gear which is necessary for maintaining precise switching paths, can be carried out simply by screwing the piston rod more or less deeply into the thread.
  • the precisely set screw-in depth is then determined by the tension in the thread bearing slotted parts of the fork head are clamped together with the aid of the clamping screws bridging the longitudinal slots, so that the threaded connection between the fork head and the piston rod is secured against rotation.
  • This screw secures the cross bolt, which fixes the coupling rod leading to the deflection gear in the clevis, against rotation and migration out of the clevis.
  • the bore in the cross bolt has a greater play than the bore in the fork head, so that the fork-shaped part of the fork head with the fork lugs maintains sufficient elasticity so as not to impede the bracing of the fork head on the piston rod.
  • FIGS. 1 to 3 of the drawing show a partial section through the switch frame of an electrical high-voltage circuit breaker.
  • Figures 2 and 3 show, on an enlarged scale and partially in section, the fork head engaging in the protective tube with the piston and coupling rod.
  • a switch frame 1 arranged the support insulators 2, which carry the switch housing, not shown, with the interrupter units, in which the stationary and movable contact pieces are located.
  • the movable switching element of the interrupter unit is actuated by a hydraulic drive 5 via a switching rod 3 made of insulating material and passing through the support insulator 2 and a deflecting gear 4 located at earth potential in the switch frame 1.
  • the piston rod 6 of the hydraulic drive 5 is connected via a fork head 7 to a coupling rod 8 leading to the deflection gear 4.
  • a protective tube 11 is provided in front of the hydraulic cylinder 9, which surrounds the piston rod 6.
  • the length of this protective tube 11 is dimensioned such that the fork head 7 is provided with a guide ring 13 on its end face 12 facing the piston rod 6, even in the most extended position of the piston rod 6 (ON position of the switch) still inside the protective tube 11 lies.
  • the guide ring 13 lies in an end-face annular shoulder 14 of the fork head 7, which has a close fit to the inner diameter 15 of the protective tube 11 indicated by arrows.
  • the outer edge 16 of the ring shoulder 14 acts as a clearing edge during the reciprocating movement of the piston rod 6 and cleans the interior of the protective tube 11.
  • the piston rod 6 is screwed into a thread 17 lying approximately in the middle of the fork head 7.
  • a constriction 18 in the fork head 7 between the area of the thread 17 and the ring shoulder 14.
  • the fork head 7 has longitudinal slots 19 in the area of the thread 17 up to the constriction 18 (see FIG. 3). This gives the fork head 7 a certain elasticity and resilience Flexibility.
  • the coupling rod 8 leading to the deflection gear 4 is inserted on the other side of the fork head 7 into the slot 20 between the fork attachments 21 and held there by the cross bolt 22. Due to the crank movement of the reversing gear 4, 8 transverse forces are transmitted to the fork head 7 via the coupling rod. These transverse forces are transmitted to the protective tube 11 as a result of the elasticity of the fork head 7 with respect to bending, via the guide ring 13, which fits tightly against the inner circumference of the protective tube 11, so that the piston rod 6 is only subjected to axial forces.
  • the fork lugs 21 of the fork head 7 there are also two bores 25 which run parallel to the longitudinal axis 24 of the fork head 7 and which, starting from the end face 26 of the fork head 7 facing the deflecting gear 7, extend to the other side of the bore 27 for the transverse bolt 22 extend and are only provided with a thread 28 there.
  • the cross pin 22 is provided with corresponding bores 29 which run parallel to one another and are arranged perpendicular to its longitudinal axis and whose diameter 30, indicated by arrows, is larger than the diameter of the bores 25.
  • screws 31 are then screwed into the thread 28 from the end face 26, the heads 32 of which lie in front of the end face 26 of the fork head 7. These screws 31 secure the cross pin 22 against undesired movements or migration. Since the bores 29 in the cross pin 22 have a large play in relation to the screws 31, its fixing does not hinder the bracing of the piston rod 6 in the fork head 7 with the aid of the clamping screws 23.

Landscapes

  • Actuator (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Circuit Breakers (AREA)
EP88730209A 1987-09-30 1988-09-13 Disjoncteur électrique de puissance à haute tension Expired - Lifetime EP0310538B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3733465 1987-09-30
DE19873733465 DE3733465A1 (de) 1987-09-30 1987-09-30 Elektrischer hochspannungs-leistungsschalter

Publications (2)

Publication Number Publication Date
EP0310538A1 true EP0310538A1 (fr) 1989-04-05
EP0310538B1 EP0310538B1 (fr) 1992-06-17

Family

ID=6337547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730209A Expired - Lifetime EP0310538B1 (fr) 1987-09-30 1988-09-13 Disjoncteur électrique de puissance à haute tension

Country Status (3)

Country Link
EP (1) EP0310538B1 (fr)
JP (1) JPH01115019A (fr)
DE (3) DE3733465A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7650816B2 (en) 2003-04-09 2010-01-26 Siemens Aktiengesellschaft Deflection lever
DE102010052979A1 (de) * 2010-11-30 2012-05-31 Maschinenfabrik Reinhausen Gmbh Laststufenschalter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19716956C2 (de) * 1997-04-17 1999-02-18 Siemens Ag Elektrischer Leistungsschalter mit einem Kraftbegrenzungselement
JP5111058B2 (ja) 2007-11-02 2012-12-26 Ｓｕｓ株式会社 構造材の結合構造

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2913379A1 (de) * 1979-03-30 1980-10-02 Siemens Ag Mehrpoliges elektrisches schaltgeraet mit einem in den innenraum eines rohrfoermigen grundgestells hineinragenden montagekoerper
FR2452774A1 (fr) * 1979-03-26 1980-10-24 Bbc Brown Boveri & Cie Dispositif d'accouplement amovible d'interrupteur haute tension de puissance

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452774A1 (fr) * 1979-03-26 1980-10-24 Bbc Brown Boveri & Cie Dispositif d'accouplement amovible d'interrupteur haute tension de puissance
DE2913379A1 (de) * 1979-03-30 1980-10-02 Siemens Ag Mehrpoliges elektrisches schaltgeraet mit einem in den innenraum eines rohrfoermigen grundgestells hineinragenden montagekoerper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7650816B2 (en) 2003-04-09 2010-01-26 Siemens Aktiengesellschaft Deflection lever
DE102010052979A1 (de) * 2010-11-30 2012-05-31 Maschinenfabrik Reinhausen Gmbh Laststufenschalter

Also Published As

Publication number Publication date
JPH01115019A (ja) 1989-05-08
DE8717769U1 (fr) 1989-12-21
DE3733465A1 (de) 1989-04-20
EP0310538B1 (fr) 1992-06-17
DE3872142D1 (de) 1992-07-23

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