US3240224A - Valve for the momentary blasting of the interrupter contacts gap in pressurised gas circuit breakers - Google Patents

Valve for the momentary blasting of the interrupter contacts gap in pressurised gas circuit breakers Download PDF

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Publication number
US3240224A
US3240224A US31056463A US3240224A US 3240224 A US3240224 A US 3240224A US 31056463 A US31056463 A US 31056463A US 3240224 A US3240224 A US 3240224A
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US
United States
Prior art keywords
valve
gas
blasting
circuit breakers
pressurised 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 - Lifetime
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English (en)
Inventor
Horl Konrad
Slameczka Otto Friedrich
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 Germany
Original Assignee
Bbc Brown Boveri & Cie
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.)
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Publication date
Application filed by Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US3240224A publication Critical patent/US3240224A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1228—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston with a stationary piston
    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • 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
    • Y10T137/3367—Larner-Johnson type valves; i.e., telescoping internal valve in expanded flow line section

Definitions

  • the invention relates to an improvement in the construction of the valve utilized momentarily blasting with gas the gap formed between the interrupter contacts in pressurised gas circuit breakers in order to assist in extinction of the are.
  • the movable valve element possesses an operating piston which forms both an operating chamber and a damping chamber with the fixed guide pieces whereby in order to open the valve, the piston operating chamber is filled with pressurised gas, and for closing the valve, a resetting spring is provided.
  • a further disadvantage of the ordinary valve is that as a result of the pressure which acts on the valve plate in the closed position, a relatively large force is necessary to open the valve. Besides this the sealing materials, e. g. rubber, always used in these valves are severely stressed thus reducing their life span.
  • the closing pressure which is exerted on the valve plate be partially compensated by providing a compensating piston connected to the valve plate. This solution however results in an increase in the number of parts, which in turn results in an increase in the cost of the valve while the mass to be moved and the necessary installation space is also increased.
  • the present invention has for its purpose to provide a mode or" construction for the valve which avoids the above mentioned disadvantages and which provides a turbulence-free flow of the gas through the valve.
  • the invention therefore proposes that the valve member consist of a single cylindrical body provided with circular ring-shaped operating pistons whereby the operating pistons and the fixed guide pieces for the movable valve member are placed inside the latter around which the gas flows. In this way it is achieved that when the valve is in the closed position a moderate pressure can be maintained by the closing piece on the sealing material while the gas flows around the valve member with a minimum change in direction.
  • FIG. 1 is the gassupply container into which a support 2, which carries the valve, is welded.
  • This support consists of a flange 3,240,224 Patented Mar. 15, 1966 part 3 to which the guide pieces 4, S are connected at its lower end by means of the ribs 6.
  • the guide piece 5 is streamlined in construction and is connected to the guide piece 4 by means of a screw connection.
  • the movable valve member 7 surrounds the two guide pieces 4, 5 but is capable of moving with respect to these pieces and possesses a ring-shaped operating piston 8 on its inner surface. This piston 8 separates the operating chamber 9 from the damping chamber 10.
  • the guide piece 4 contains a canal 11 which leads to the operating chamber 9 and a canal 12 which leads to the damping chamber 10.
  • the connecting pipes 11a and 12a which pass through the gas container 1 are connected to the canals 11 and 12 respectively.
  • the resetting spring 13 acts between the ribs 6 and the valve member 7.
  • the seal 14 is positioned on the flange 3 and is fixed in place by the capping piece 15 into which the gas conduit 16, which leads to the arcing chamber (not shown here), is set.
  • the method of operation is as follows:
  • a control valve allows pressurised gas to reach the operating chamber 9 through the connecting pipe 11a and the canal 11 in the usual manner.
  • the pressure acting from above on the piston 8 causes the cylindrical member 7 to be moved downwards so that the stream of pressurised gas from the gas container 1 is allowed to pass through the gas conduit 16 to the interrupter contacts, not illustrated.
  • the piston 8 moving downwards causes a compressive damping action in the damping chamber 10.
  • This damping action can be regulated to achieve the desired operating conditions by means of an adjustable orifice for example (orifice is not shown here), positioned at the end of the connecting pipe 12a.
  • the connecting pipes 11a, 12a are led out through the housing of the gas container 1 in a gas tight manner either on the underside or also in certain cases through the side wall of the container 1 so that the parts, such as control valve and orifice, connected to these pipes are easily accessible.
  • the chamber 9 is exhausted by means of the impulse type control valve connected to the connecting pipe 11a.
  • the resetting spring 13 then returns the cylindrical member 7 to the closed position shown in the drawing. In this position the force exerted on the seal ring 14 by the cylindrical valve member 7 is determined by the operating pressure in the gas container 1 and the ring crosssection, determined by the thickness of the wall of the cylindrical valve member 7, whereby the force of the resetting spring operates in a complementary manner.
  • This new arrangement permits an inexpensive and space-saving construction of valves favourable to gas flow for pressurised gas circuit breakers.
  • the response time, and the time for the valve to open are both shortened thereby achieving a desirable short breaking-time of the circuit breaker.
  • a valve construction for use in controlling flow of a pressurized gas from a supply container to the interrupter contacts of a circuit breaker for the purpose of blasting said contacts with the gas upon opening of said contacts to facilitate extinction of the are formed therebetween, the combination comprising an outlet from said pressurized gas container which includes a ring-shaped sealing ring constituting a valve seat, said outlet being established by a cylindrical support member at one end of which said sealing ring and valve seat are located and said support member further including inwardly facing ribs, a movable valve member constituted by a single piece hollow cylindrical body one end of which is adapted to close against said sealing ring, said cylindrical body also including an inwardly extending piston portion dividing the interior of said body into a piston operating chamber at one side of said piston and a damping chamber at the opposite side of said piston, stationary guide means in the form of an elongated guide member located within said cylindrical body for said body and its piston portion, said elongated member being secured to said ribs of said support member and including internal longitudinal
  • a resetting coil spring for said movable cylindrical valve body, said resetting spring surrounding said elongated guide member and being under compression between said ribs of said support member and the end of said cylindrical valve body opposite the end engaged with said sealing ring, the pressurized gas flowing to said outlet around said cylindrical valve body and being passed through the peripheral gap between the end of said cylindrical valve body and said sealing ring upon movement of said cylindrical valve body axially of itself in the valve 01 ening direction when pressurized gas is admitted to said operating piston chamber.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US31056463 1962-10-09 1963-09-23 Valve for the momentary blasting of the interrupter contacts gap in pressurised gas circuit breakers Expired - Lifetime US3240224A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1181762A CH395242A (de) 1962-10-09 1962-10-09 Schaltventil zur kurzzeitigen Beblasung der Leistungsschaltstellen von Druckgasschaltern

Publications (1)

Publication Number Publication Date
US3240224A true US3240224A (en) 1966-03-15

Family

ID=4377151

Family Applications (1)

Application Number Title Priority Date Filing Date
US31056463 Expired - Lifetime US3240224A (en) 1962-10-09 1963-09-23 Valve for the momentary blasting of the interrupter contacts gap in pressurised gas circuit breakers

Country Status (5)

Country Link
US (1) US3240224A (enExample)
AT (1) AT238292B (enExample)
BE (1) BE638307A (enExample)
CH (1) CH395242A (enExample)
SE (1) SE301341B (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415486A (en) * 1966-05-25 1968-12-10 Anne S De Frees Spring biased tank outlet valve
US3789866A (en) * 1972-10-27 1974-02-05 Dev De La Rech Appliquee Soc P Pressurized fluid valves
FR2330935A1 (fr) * 1975-11-05 1977-06-03 Lattuada Sergio Vanne asservie a trois voies pour la deviation ou la commutation d'un courant liquide ou gazeux

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH49950A (de) * 1909-12-06 1911-04-17 Der Ludw V Roll Schen Eisenwer Rohrabschließung mit hydraulisch gesteuertem Hohlkolbenschieber für Hochdruckleitungen
US2361225A (en) * 1943-05-12 1944-10-24 Wheaton Brass Works Line pressure opened self-closing valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH49950A (de) * 1909-12-06 1911-04-17 Der Ludw V Roll Schen Eisenwer Rohrabschließung mit hydraulisch gesteuertem Hohlkolbenschieber für Hochdruckleitungen
US2361225A (en) * 1943-05-12 1944-10-24 Wheaton Brass Works Line pressure opened self-closing valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415486A (en) * 1966-05-25 1968-12-10 Anne S De Frees Spring biased tank outlet valve
US3789866A (en) * 1972-10-27 1974-02-05 Dev De La Rech Appliquee Soc P Pressurized fluid valves
FR2330935A1 (fr) * 1975-11-05 1977-06-03 Lattuada Sergio Vanne asservie a trois voies pour la deviation ou la commutation d'un courant liquide ou gazeux

Also Published As

Publication number Publication date
CH395242A (de) 1965-07-15
BE638307A (enExample) 1900-01-01
SE301341B (enExample) 1968-06-04
AT238292B (de) 1965-02-10

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