US3575195A - Valve device for intercepting faulty circuits in pneumatic plants with a plurality of circuits - Google Patents

Valve device for intercepting faulty circuits in pneumatic plants with a plurality of circuits Download PDF

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Publication number
US3575195A
US3575195A US844693*A US3575195DA US3575195A US 3575195 A US3575195 A US 3575195A US 3575195D A US3575195D A US 3575195DA US 3575195 A US3575195 A US 3575195A
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US
United States
Prior art keywords
piston
valve
compressed air
air source
circuits
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
US844693*A
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English (en)
Inventor
Giuseppe Alfieri
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.)
Industrie Magneti Marelli SRL
Marelli Europe SpA
Original Assignee
Magneti Marelli SpA
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 Magneti Marelli SpA filed Critical Magneti Marelli SpA
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Publication of US3575195A publication Critical patent/US3575195A/en
Anticipated expiration legal-status Critical
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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
    • F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
    • F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
    • 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
    • Y10T137/4673—Plural tanks or compartments with parallel flow
    • Y10T137/4857—With manifold or grouped outlets
    • 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
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface

Definitions

  • the valve device comprises a piston controlled shutoff valve.
  • the piston is spring biased to a valve-closed position and is moved against the spring bias to a valve-open position by normal operating pressure. A drop from normal operating pressure causes the piston to close the valve thereby isolating the faulty circuit.
  • the object of the present invention is to provide a device of simple structure, insertable at the input of each circuit, to effect the separation of the faulty circuit, as well as to obtain, in the other circuits, a pressure only slightly lower than that obtainable in the plant in normal conditions. It is further posible to insert the device in the pressure regulator, i.e. as-
  • the device according to the invention comprises a shutoff valve, controlled 'by a piston responsive to the feeding pressure in opposition to the adjustable load of a spring.
  • the above-mentioned valve is open when the working conditions are normal and it closes when the air pressure decreases below a preestablished value, when a failure occurs within the circuit controlled by the device of this invention; whereas the maximum pressure obtainable in the other circuits is limited to the above-mentioned value, after evacuation of a certain quantity of pressurized air from the tanks.
  • the value of the pressure which causes the intervention of the device can be established with an almost perfect exactitude', i.e. with a maximum difference of one-half of an atmosphere with respect to the working pressure of the plant.
  • FIG. I is a schematic view of a pneumatic, fine circuit plant, provided with the device according to the present invention.
  • FIG. 2 shows a similar plant equipped with the devices according to the invention, said devices being inserted in the pressure regulator together with the shutoff valves;
  • FIG. 3 is a cross section of the device according to the invention in the position correspondingto both a rest condition and after failure of the circuit controlled thereby;
  • FIG. 4 is a section of the device according to the invention under normal operating conditions.
  • FIG. 5 is a pressure regulator incorporating three of the devices of the present invention.
  • FIGS. I and 2 the device of the invention isindicated with reference letter A, whereas the reference letters C, R, V
  • the pressure cannot increase over a value greaterthan that which causes the initial opening of valve 8, since at this point the excess pressure is discharged through the same valve, as well as through the failure which occurred in the circuit controlled by said valve.
  • FIG. 5 shows the pressure'regulator R for a three-circuit plant, incorporating devices A,, A and A according to this and S indicate the compressor, the pressure regulator, the l shutoff valves and the tanks of the various circuits,
  • body 1 contains therein a piston 2 slidably moving through gasket 3 and pushed downward by the load of spring 4, said spring being adjustable by means'of screw 5.
  • Piston 2 has a seat 6 in which is housed the ballshaped end of rod 7 of a valve 8.
  • the valve 8 is biased against seat 9 by spring I0.
  • Inlet II is connected to the pneumatic source and outlet 12 to the tank of the pneumatic circuit, by means of retaining valve (not shown in the FIG.
  • the surface areas of the seat of valve 8 and of piston 2 near gasket 3, the length of rod 7 of valve 8, as well as the loads of springs 4 and 10 are mathematically related to determine the values of the operating pressures of the device.
  • FIG. 4 shows the device in positions feed the tank invention.
  • a pneumatic plant and in particular a plant designed for installation in motor vehicles, having a compressed air source connected, through a pressure regulator, to a plurality of pneumatic circuits, each of which is provided with a corresponding tank, an intercepting device inserted between the compressed air source and each of tanks of said pneumatic circuits, said intercepting device comprising housing having an inlet connected to said compressed air source and an outlet connected to a pneumatic circuit, a gate valve mounted in said housing to close the outlet thus preventing communication between said compressed air source and the tank of the respective circuit; a piston movably mounted in said housing to close said inlet, means operatively connecting said piston to said gate valve, spring means biasing said valve and said piston to their closed positions, said piston being influenced, on one hand, by said spring means and, on the other hand, by the pressure from the compressed air source, in such a way that said gate valve is selectively opened and closed by the combined and differential actions of the pressures in the tank of the said circuit and of the pressure provided by said connected at 11 from the pneu

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Pressure (AREA)
US844693*A 1968-05-10 1969-05-12 Valve device for intercepting faulty circuits in pneumatic plants with a plurality of circuits Expired - Lifetime US3575195A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1632168 1968-05-10

Publications (1)

Publication Number Publication Date
US3575195A true US3575195A (en) 1971-04-20

Family

ID=11148806

Family Applications (1)

Application Number Title Priority Date Filing Date
US844693*A Expired - Lifetime US3575195A (en) 1968-05-10 1969-05-12 Valve device for intercepting faulty circuits in pneumatic plants with a plurality of circuits

Country Status (5)

Country Link
US (1) US3575195A (enExample)
DE (1) DE1923543B2 (enExample)
ES (1) ES367040A1 (enExample)
FR (1) FR2008210A1 (enExample)
TR (1) TR17504A (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6206027B1 (en) * 1996-12-13 2001-03-27 Societe Nationale D'etude Et De Construction De Moteurs D'aviation - S.N.E.C.M.A. Tank for pressurized fluid, in particular for liquefied gas
US20070123871A1 (en) * 2003-09-24 2007-05-31 Tae-Ahn Jahng Method and apparatus for flexible fixation of a spine
US20070276380A1 (en) * 2003-09-24 2007-11-29 Tae-Ahn Jahng Spinal stabilization device
US20100152776A1 (en) * 2008-12-17 2010-06-17 Synthes Usa, Llc Posterior spine dynamic stabilizer
US20110106167A1 (en) * 2003-09-24 2011-05-05 Tae-Ahn Jahng Adjustable spinal stabilization system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117759751B (zh) * 2024-02-22 2024-05-28 江苏乐科节能科技股份有限公司 一种防泄漏的调压阀

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866377A (en) * 1931-01-22 1932-07-05 Sky Specialties Corp Pressure regulator
US2436815A (en) * 1944-03-15 1948-03-02 Gen Electric Pressure operated valve
US2783087A (en) * 1954-01-29 1957-02-26 Emanuel G Rainson Circulating type oil burner
US3062232A (en) * 1958-12-29 1962-11-06 John B Mcgay Combination two direction check and gate valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866377A (en) * 1931-01-22 1932-07-05 Sky Specialties Corp Pressure regulator
US2436815A (en) * 1944-03-15 1948-03-02 Gen Electric Pressure operated valve
US2783087A (en) * 1954-01-29 1957-02-26 Emanuel G Rainson Circulating type oil burner
US3062232A (en) * 1958-12-29 1962-11-06 John B Mcgay Combination two direction check and gate valve

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6206027B1 (en) * 1996-12-13 2001-03-27 Societe Nationale D'etude Et De Construction De Moteurs D'aviation - S.N.E.C.M.A. Tank for pressurized fluid, in particular for liquefied gas
US20070123871A1 (en) * 2003-09-24 2007-05-31 Tae-Ahn Jahng Method and apparatus for flexible fixation of a spine
US20070276380A1 (en) * 2003-09-24 2007-11-29 Tae-Ahn Jahng Spinal stabilization device
US20110106167A1 (en) * 2003-09-24 2011-05-05 Tae-Ahn Jahng Adjustable spinal stabilization system
US8623057B2 (en) 2003-09-24 2014-01-07 DePuy Synthes Products, LLC Spinal stabilization device
US8968366B2 (en) 2003-09-24 2015-03-03 DePuy Synthes Products, LLC Method and apparatus for flexible fixation of a spine
US8979900B2 (en) 2003-09-24 2015-03-17 DePuy Synthes Products, LLC Spinal stabilization device
US20100152776A1 (en) * 2008-12-17 2010-06-17 Synthes Usa, Llc Posterior spine dynamic stabilizer

Also Published As

Publication number Publication date
TR17504A (tr) 1975-07-23
ES367040A1 (es) 1971-04-01
DE1923543B2 (de) 1974-06-27
DE1923543A1 (de) 1969-11-20
FR2008210A1 (enExample) 1970-01-16

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