US3751184A - Pneumatic tube system with stand-by blower - Google Patents

Pneumatic tube system with stand-by blower Download PDF

Info

Publication number
US3751184A
US3751184A US00197328A US3751184DA US3751184A US 3751184 A US3751184 A US 3751184A US 00197328 A US00197328 A US 00197328A US 3751184D A US3751184D A US 3751184DA US 3751184 A US3751184 A US 3751184A
Authority
US
United States
Prior art keywords
blower
main
compressed air
stand
air
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
US00197328A
Other languages
English (en)
Inventor
F Buchwald
D Pienkny
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.)
Alcatel Lucent NV
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3751184A publication Critical patent/US3751184A/en
Assigned to ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS reassignment ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G51/00—Conveying articles through pipes or tubes by fluid flow or pressure; Conveying articles over a flat surface, e.g. the base of a trough, by jets located in the surface
    • B65G51/04—Conveying the articles in carriers having a cross-section approximating that of the pipe or tube; Tube mail systems
    • B65G51/08—Controlling or conditioning the operating medium

Definitions

  • the invention relates to a pneumatic tube system employing a vaccum intake air blower as well as a compressed-air blower for supplying the operating air, and in which, besides these blowers, there is also provided a stand-by blower.
  • the invention resides in the fact that one single stand-by blower, via respectively only one controlled valve and one back-pressure valve, is arranged parallel in relation to the. compressed-air blower as well as parallel in relation to the vacuum intake air blower, and also in the fact that a further separate. back-pressure valve is provided on the vacuum side of the vacuum intake air blower and on the compressed-air side of the compressed-air blower.
  • back-pressure valves are operated by the operating air
  • only two controlled valves are contained in the system, of which respectively one has to be operated upon the failure of a corresponding one of the operating air blowers.
  • the controlled valve for compressed-air operation is arranged on the vacuum side of the stand-by blower,.and the one for vacuum operation is accordingly arranged on the compressed-air side.
  • back-pressure valves are arranged in the operating air ducts of the operating air blowers, i.e. one each in the operating air duct of the compressed-air blower on the compressedair side thereof and in the operating air'duct of the vacuum intake air blower on the vacuum side thereof.
  • FIG. 1 schematically showing the arrangement for two main blowers and one stand-by blower according to the invention and FIG. 2 showing a control circuit therefor.
  • the compressed-air blower M1 is positioned in the air duct extending between the air entrance 1 and the compressed-air connection 2 of the pneumatic tube system.
  • the vacuum intake air blower M2 is positioned in the air duct extending from the vacuum connection 4 of the pneumatic tube system to the air exit 3.
  • each of these air ducts there is moreover, also arranged respectively one sound absorber (silencer) 5 or 6, and one air filter 7 or 8.
  • the air'entrance sides of the blowers M1 and M2 are in communication with one another by the air duct 10, and the air exit sides are in communication with one another by the air duct 11.
  • the arrangement operates as follows: Normally, the blowers M1 and M2 are in operation.
  • the compressedair blower Ml has its air intake at 1, and supplies compressed air to the pneumatic tube systemv at 2. Simi' larly, the vacuum intake airblower M2 has its operating air intake from the system at 4, and presses the latter out into the. open air at 3'.
  • the controlled valves V1 and V2 are closed. Likewise closed. are: the backpressure valves 20 and 21, which are arranged in' the connecting air ductsl0 and 11-, because the stand-by blower M3 is inoperative; ln distinction thereto, the
  • the supervisory element thereof will effect the opening of the controlled valve V2, and the application of the blower M3 to the source of voltage. There is then produced an air stream flowing from the vacuum connection 4 via the air filter 8, the back-pressure valve 20, the blower M3, the controlled valve V2, via the sound absorber (silencer) 5, to the air exit 3. Since the back-pressure valves 21 and 23 are in the reverse direction with respect to air pressure, these valves are closed.
  • the contact 23a is closed in similar manner to closing of contact 22a in the example situation described above for blower M1 failing.
  • the relay 31 is energized, with the contacts 31a and 31b thereof applying the valve V2, the fault-indicating lamp L2, and the stand-by blower M3 to the mains voltage, and thereby effect a full change-over to stand-by blower operation.
  • a pneumatic tube system incorporating a main vacuum intake air blower as well as a main compressed air blower for supplying the operating air, and further incorporating a single stand-by blower, the arrangement comprising a first controlled valve and a first back-pressure valve for coupling said-stand-by blower in parallel relative to the main compressed air blower, a second controlled valve and a second back-pressure valve for coupling said stand-by blower in parallel relative to the main vacuum intake air blower, a third backpressure valve provided on the vacuum side of the main vacuum intake air blower and a fourth back-pressure valve provided on the compressed air side of the compressed air blower.
  • said third and fourth back-pressure valves comprise control means for detecting a failure of one of the main blowers and for activating said stand-by blower to an operative condition and the controlled valve associated with the failed main blower to an open condition, and thereby maintaining normal system operation via a single standby blower.
  • a main vacuum intake air blower coupled between the vacuum connection and a system air exit and a main compressed air blower coupled between a system air entrance and the compressed air connection
  • said arrangement comprising a single standby blower operatively coupled in said pneumatic system for maintaining system operation in substitution of either of said main blowers in the event of failure of either one of the latter
  • said stand-by blower being associated with said main compressed air blower by being coupled firstly in parallel to said main compressed air blower between said system air entrance and said compressed air connection, and being associated with said main vacuum intake air blower by being coupled secondly in parallel to said main vacuum intake air blower between said vacuum connection and said system air exit
  • said first parallel coupling including a first controlled valve coupled between the system air entrance and the air intake side of-said main compressed air blower and a first back-pressure valve coupled between the compressed air side of said main compressed air blower and said compressed air connection
  • said second parallel coupling including a second controlled valve coupled between

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
US00197328A 1970-11-23 1971-11-10 Pneumatic tube system with stand-by blower Expired - Lifetime US3751184A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2057557A DE2057557C2 (de) 1970-11-23 1970-11-23 Rohrpostanlage mit einem Saugluft- und einem Druckluftgebläse und Reserveschal-

Publications (1)

Publication Number Publication Date
US3751184A true US3751184A (en) 1973-08-07

Family

ID=5788892

Family Applications (1)

Application Number Title Priority Date Filing Date
US00197328A Expired - Lifetime US3751184A (en) 1970-11-23 1971-11-10 Pneumatic tube system with stand-by blower

Country Status (3)

Country Link
US (1) US3751184A (de)
CH (1) CH534628A (de)
DE (1) DE2057557C2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040259A (en) * 1972-12-15 1977-08-09 Phillips Petroleum Company Recovery of natural gas liquids by partial condensation
US4140437A (en) * 1972-03-20 1979-02-20 Giovanni Faldi Apparatus for the long distance conveying of liquids mixed with solid substances using a compressed air pump
US4435194A (en) 1980-02-12 1984-03-06 La Calhene Circuit for ventilating and filtering the medium contained in a confinement enclosure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7514164L (sv) * 1975-12-15 1977-06-16 Atlas Copco Ab Forfarande och anordning for samtidig inmatning av flera patroner i ett borrhal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2607297A (en) * 1945-05-03 1952-08-19 Power Jets Res & Dev Ltd Pressure fluid supply system
US2617477A (en) * 1948-08-05 1952-11-11 Simmonds Aerocessories Inc Stand-by fuel feed control with hydraulic switching

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2607297A (en) * 1945-05-03 1952-08-19 Power Jets Res & Dev Ltd Pressure fluid supply system
US2617477A (en) * 1948-08-05 1952-11-11 Simmonds Aerocessories Inc Stand-by fuel feed control with hydraulic switching

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140437A (en) * 1972-03-20 1979-02-20 Giovanni Faldi Apparatus for the long distance conveying of liquids mixed with solid substances using a compressed air pump
US4040259A (en) * 1972-12-15 1977-08-09 Phillips Petroleum Company Recovery of natural gas liquids by partial condensation
US4435194A (en) 1980-02-12 1984-03-06 La Calhene Circuit for ventilating and filtering the medium contained in a confinement enclosure

Also Published As

Publication number Publication date
DE2057557B2 (de) 1972-06-08
CH534628A (de) 1973-03-15
DE2057557C2 (de) 1973-01-04
DE2057557A1 (de) 1972-06-08

Similar Documents

Publication Publication Date Title
US3751184A (en) Pneumatic tube system with stand-by blower
JPH0470181B2 (de)
US3957314A (en) Device for monitoring the flow in the air line of an air brake system on a railway vehicle
JPH0392588A (ja) 真空槽を含む設備のための逆流防止安全装置
US2244384A (en) Fluid pressure supply system
US4493244A (en) Pneumatic door operator
US2295775A (en) Compressor control apparatus
JPS6326500A (ja) 圧縮ガス容器系統自動切換装置
US5268593A (en) Switching power source circuit
JPS5954500A (ja) プレス用安全制御装置
US1672690A (en) Control system and apparatus for electrical device
US1672681A (en) Control system for air compressors
WO2022014139A1 (ja) 空気作動弁の駆動機構
CN114026446B (zh) 个别停电检测系统以及个别停电检测方法
US3181000A (en) Fluid operated control system
US4041842A (en) Dual-solenoid safety valve
JP2548296Y2 (ja) ブレーキ付空気圧シリンダ用制御装置
SU994321A1 (ru) Электропневматическа тормозна система
JPH047362Y2 (de)
GB1063094A (en) Improvements in and relating to vehicle pneumatic suspension systems
SU992881A1 (ru) Устройство подачи сжатого газа
US1110412A (en) Apparatus for the control of railway cars or trains.
SU982950A1 (ru) Установка дл осушки сжатого воздуха тормозной магистрали локомотива
US664086A (en) Regulator for electrically-actuated air-compressors.
SU859679A1 (ru) Пневматическое устройство дл управлени насосной станцией

Legal Events

Date Code Title Description
AS Assignment

Owner name: ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE;REEL/FRAME:004718/0023

Effective date: 19870311