US3701867A - Double pressure compressed air electric apparatus having an air drying device - Google Patents

Double pressure compressed air electric apparatus having an air drying device Download PDF

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Publication number
US3701867A
US3701867A US119255A US3701867DA US3701867A US 3701867 A US3701867 A US 3701867A US 119255 A US119255 A US 119255A US 3701867D A US3701867D A US 3701867DA US 3701867 A US3701867 A US 3701867A
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US
United States
Prior art keywords
pressure
air
low
enclosure
atmosphere
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
US119255A
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English (en)
Inventor
Jean Claude Henry
Gerard Billon
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
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Publication of US3701867A publication Critical patent/US3701867A/en
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    • 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
    • H01H33/57—Recuperation of liquid or gas
    • 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
    • H01H33/562—Means for avoiding liquefaction or for disposing of liquefaction products

Definitions

  • the device for the recovery of dry air and circulation in a substantially closed cycle which comprises a drier provides a satisfactory solution by decreasing the use of the absorbent material.
  • the feed air continuously passes through the drying deviceof absorbent filter inserted in the circulation system, but once dry it deposits therein merely traces of moisture-resulting from possible slight leaks which are compensated for by an addition of ambient air.
  • the filter retains its absorbent properties longer the more limited are the quantities of ambient air introduced into the circulation system.
  • the example selected consists of a compressed-air circuit interrupter which operates in closed cycle, but
  • the invention may naturally find other applications inany electric apparatus utilizing two compressed air pressures and subject to leaks which make aninterrnittent addition of moist outer air necessary.
  • a compressed-air circuit interrupter has two arc-extinguishing chambers 10, 12 borne by a hollow support insulator 1 4 secured at its lower end to a low-pressure, enclosure or tank 16 which is located in a zone of ground potential in such a manner that the inside of the insulator 14 communicates normallyhermetically with the tank 16.
  • An insulating conduit 18 extending the insulator 14 connects the highand low-potential zones and feeds the chambers I0, 12 with highpressurized air.
  • the air forwarded by the conduit 18 can feed auxiliary high-pressure tanks located in the region of high potential or directly feed arc blast devices or pneumatic control devices for the contacts (not shown) located in the chambers.
  • a Compressor 20 which, via a conduit 24, in
  • the suction or intake conduit 35 of the compressor 20 is connected to a three-way valve or pneumatic relay 36 comprising a valve member '37 which cooperates with two stationary valve seats 38 and 39 in order to establish a selective communication on the
  • An object of the invention is to provide an economione hand between the conduit 35 and the inside of the low-pressure enclosure 16, by means of a passage 42 when it is applied against the seat 39 and on the other hand between the conduit 35 and the atmosphere, via tube 40 provided with an air-drying filter 41, when it is applied against the seat-38.
  • a compression spring 43 biases the valve towards said second position (lefthand position) and an electrically operated pilot valve 44, the coil 45 of which may be excited by a source of current 46 by means of a pressure contact 47 sensitive to the pressure in the enclosure 16, makes it possible to admit compressed air of high pressure coming from the tank 28 through a conduit 48 behind a diaphragm 49 in order to bring the valve 37 to its first (righthand) position, which is its position of normal operation.
  • Exhaust valves 54, 56 shown schematically and associated with the arc-extinguishing chambers 10, 12, respectively, discharge into a space 58 which communicates hermetically with the inside of the hollow insulator 14.
  • the space 58, the hollow insulator 14 and the housing 16 constitute a low-pressure enclosure for the recovery of the air escaping from the chambers 10, 12 through the valves 54 and 56.
  • the recovery enclosure is adapted to communicate I with the ambient atmosphere only throughthe discharge valve 30.
  • the compressed-air circuit interrupter in accordance with the invention operates in the following manner:
  • the valve 37 Under the action of the spring 43, is in its second position of rest shown in the drawing.
  • the starting of the vcompressor-20 (which is driven in a conventional manner which does not form part of the present invention) causes the tank 28 and chambers and 12 to be placed under high pressure (for instance 15 bars) via the tube 18, the compressor taking air in through the tubes 35 and 40 from the outside atmosphere, the air drawn in being dried by the filter 4.1.
  • the compressor stops.
  • the low-pressure enclosure 58, 14 and 16 is also placed under pressure either independently or after. an operation of the exhaust valves 54 and 56.
  • the manostat 47 which is set at this value, closes and excites the coil 45 of thepilot valve 44 which opens, admitting the pressure from the tank 28 through the conduit 48 behind the diaphragm 49.
  • the valve 37 then immediately moves towards its first position of rest, coming against the seat 39, separating the enclosure 16- from the open air and establishing communication between the intake conduit 35 and the inside of the enclosure 16.
  • the compressor Upon' the subsequent operation of the compressor, in particular after an opening operation of the circuit interrupter resulting in a drop of pressure .in the tank 28, the compressor reestablishes the high pressure in said tank 28, taking air only from the enclosure 16.
  • the high-pressure air admitted into the arc-extinguishing chambers 10, 12 and serving, inter alia, for the blowing of the arcs escapes through the valves 54, 56 and is collected in the low-pressure enclosure 58, 16, causing therein a normal increase in the pressure which is insufficient to open the discharge valve 30.
  • the high-pressure air supplied to the chambers 1.0, 12 is taken by the conduit 18 from the high-pressure tank 28 and causes therein a drop in pressure which is sufi'rcient to cause the operation of the compressor which may, for instance, be governed by amanostat (not shown).
  • the compressor 20 takes air in from the enclosure 16 and again feeds the high-pressure tank 28 through the airdrying filter 26 so as .to re-establish therein the nominal high pressure which causes the stopping of the compressor. It is easy to see that the air circulates in closed cycle, the expanded air which escapes from the arc- 4 extinguishing. chambers 10, 12 being taken up again by the compressor 20 and returned via the conduit 18 into the chambers l0, 12. The air upon each cycle passes through the drying device 26 which eliminates the moisture from it, if there subsists any. v
  • a substantial leak of the high-pressure region towards the low-pressure region can cause a relative excess pressure in the enclosure 16 and the opening of the safety valve 30.
  • This discharge of dry air has the same consequences as the said accidental leaks, specifically a decrease in thequantity of air in the closed circuit which is compensated for upon the operation of the compressor 20 by an admission of air through the conduit 40.
  • a slight internal leak will have no effect on the airdrying devices, the dry air which escapes from the high pressure being automatically recovered in the enclosure 16 and therefore kept in the normal circulation circuit. The only effect is a more frequent operation of the compressor.
  • FIG. 2 shows another embodiment in which parts identical or similar to those in FIG. 1 have been designated by the same reference numbers.
  • the housing l6' freely communicates with the atmospheric air, for instance through grids 62, the low-pressure tank being now separate from said housing and spaced from the high-pressure.
  • a closed cycle double pressure compressed-air electric apparatus disposed in atmospheric air comprising a high-pressure compressed-air enclosure, a low-pressure compressed-air enclosure carrying compressed air having a pressure greater than the I atmospheric pressure, conduit means connecting said high-pressure compressed-air enclosure to the atmosphere, air-drying means inserted in said conduit means, compressor means in said conduit means, and pressure'responsive three-way valve means inserted in said conduit means between said compressor means and the atmosphere and also connected to said lowpressure compressed air enclosure, said three-way valve means being responsive to the pressure of said low-pressure compressed air enclosure and adapted to closure and to the atmosphere upon an abnormal drop of pressure therein below a predetermined pressure greater than the atmospheric pressure, and air-drying means to dry the air taken by said compressor from the air to said arc-extinguishing means, a low-pressure tank connect said compressor means selectively to said lowpressure compressed air enclosure and to the atmosphere in a manner such that said compressor means is normally connected to said low-pressure compressed air enclosure whereby an abnormal pressure drop in said low-pressure enclosure causes said valve means
  • a closed cycle double pressure compressed air electric apparatus disposed in atmospheric air comprising a high-pressure compressed air enclosure, a low-pressure compressed air enclosure, a compressor having a high pressure outlet connected to said high pressure enclosure and an inlet, valve means connected to said inlet and adapted to connect said inlet selectively to said low-pressure enclosure and to the atmosphere, said valve means comprising pressure sensitive control means responsive to the pressure in said low-pressure enclosure to control the position of said valve means in a manner such that said valve means connect said inlet to said low-pressure enclosure under normal pressurized condition of said low-pressure encollecting exhaust air from said arc-extinguishing means, a compressor adapted to supply high-pressurized air to said high-pressure tank and to maintain the pressure therein at a predetermined value, said compressor having an inlet, valve means connected to said inlet and also to said low-pressure tank and to the atmosphere to cause said inlet to communicate selectively with said low pressure tank and with the atmosphere, said valve means comprising pressure-sensitive control means for controlling the position of said valve means

Landscapes

  • Drying Of Gases (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Measuring Fluid Pressure (AREA)
US119255A 1970-03-04 1971-02-26 Double pressure compressed air electric apparatus having an air drying device Expired - Lifetime US3701867A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7007817A FR2082144A5 (zh) 1970-03-04 1970-03-04

Publications (1)

Publication Number Publication Date
US3701867A true US3701867A (en) 1972-10-31

Family

ID=9051693

Family Applications (1)

Application Number Title Priority Date Filing Date
US119255A Expired - Lifetime US3701867A (en) 1970-03-04 1971-02-26 Double pressure compressed air electric apparatus having an air drying device

Country Status (9)

Country Link
US (1) US3701867A (zh)
AU (1) AU2606871A (zh)
BE (1) BE763734A (zh)
CA (1) CA926897A (zh)
CH (1) CH530081A (zh)
DE (1) DE2109965A1 (zh)
ES (1) ES388826A1 (zh)
FR (1) FR2082144A5 (zh)
GB (1) GB1290648A (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4845378A (en) * 1987-03-02 1989-07-04 Bbc Brown Boveri Ag Emp generator
EP1207603A2 (en) * 2000-11-20 2002-05-22 Mitsubishi Denki Kabushiki Kaisha Gas-insulated switching apparatus
CN109565158A (zh) * 2016-08-19 2019-04-02 西门子股份公司 电能传输装置以及生命周期管理

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3023501A1 (de) * 1980-06-24 1982-01-14 Brown, Boveri & Cie Ag, 6800 Mannheim Antriebsgehaeuse fuer einen leistungsschalter, insbesondere fuer einen mittelspannungs- oder hochspannungs-leistungsschalter
CN107610969B (zh) * 2017-08-22 2019-01-29 国网山东省电力公司济南供电公司 一种断路器sf6气体实时监控和带电补气装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2550886A (en) * 1947-02-12 1951-05-01 Union Carbide & Carbon Corp System for conserving liquefied gases
DE1178925B (de) * 1961-05-25 1964-10-01 Continental Elektro Ind Ag Druckgasschalter mit innerhalb eines Druck-gasbehaelters angeordneter Schaltstelle
CA696066A (en) * 1960-06-17 1964-10-13 The English Electric Company Limited Gas blast circuit-breakers
US3566062A (en) * 1969-07-28 1971-02-23 Ite Imperial Corp Heater arrangement for sf-6 circuit breakers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2550886A (en) * 1947-02-12 1951-05-01 Union Carbide & Carbon Corp System for conserving liquefied gases
CA696066A (en) * 1960-06-17 1964-10-13 The English Electric Company Limited Gas blast circuit-breakers
DE1178925B (de) * 1961-05-25 1964-10-01 Continental Elektro Ind Ag Druckgasschalter mit innerhalb eines Druck-gasbehaelters angeordneter Schaltstelle
US3566062A (en) * 1969-07-28 1971-02-23 Ite Imperial Corp Heater arrangement for sf-6 circuit breakers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4845378A (en) * 1987-03-02 1989-07-04 Bbc Brown Boveri Ag Emp generator
EP1207603A2 (en) * 2000-11-20 2002-05-22 Mitsubishi Denki Kabushiki Kaisha Gas-insulated switching apparatus
EP1207603A3 (en) * 2000-11-20 2004-09-22 Mitsubishi Denki Kabushiki Kaisha Gas-insulated switching apparatus
CN109565158A (zh) * 2016-08-19 2019-04-02 西门子股份公司 电能传输装置以及生命周期管理
US11509121B2 (en) 2016-08-19 2022-11-22 Siemens Aktiengesellschaft Electrical energy transmission device and life cycle management

Also Published As

Publication number Publication date
CA926897A (en) 1973-05-22
BE763734A (fr) 1971-08-02
CH530081A (fr) 1972-10-31
ES388826A1 (es) 1974-02-16
FR2082144A5 (zh) 1971-12-10
AU2606871A (en) 1972-09-07
GB1290648A (zh) 1972-09-27
DE2109965A1 (de) 1971-09-30

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