US3596676A - Pressure-reducing valve - Google Patents

Pressure-reducing valve Download PDF

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Publication number
US3596676A
US3596676A US856635A US3596676DA US3596676A US 3596676 A US3596676 A US 3596676A US 856635 A US856635 A US 856635A US 3596676D A US3596676D A US 3596676DA US 3596676 A US3596676 A US 3596676A
Authority
US
United States
Prior art keywords
piston
pressure
chamber
cylinder
medium
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
US856635A
Other languages
English (en)
Inventor
Hillebrand Johannes J Kraakman
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.)
US Philips Corp
Original Assignee
US Philips 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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3596676A publication Critical patent/US3596676A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
    • 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
    • Y10T137/6851—With casing, support, protector or static constructional installations
    • Y10T137/7043—Guards and shields
    • Y10T137/7058—Sanitary covers or shields
    • 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
    • Y10T137/7784—Responsive to change in rate of fluid flow
    • Y10T137/7787—Expansible chamber subject to differential pressures
    • Y10T137/7788—Pressures across fixed choke

Definitions

  • the other end of the cylinder is provided with an outlet port through which the low-pressure fluid is passed from the valve and an inlet port is provided in the sidewall of the cylinder for introducing high pressure fluid to a space between the pistons.
  • the piston assembly is hydrostatically journaled within the cylinder and is provided with a plurality of axially extending slits which vary in passageway size by the relative position of the piston within the cylinder. The high-pressure fluid is passed through the slits to a chamber on the other side of the piston and then through'a turbulent-producing orifice to the outlet port.
  • a pressure-reducing valve which can regulate a large quantity of medium in which the pressure of the supplied medium can be a few tenths of atmospheres while the volume of the flow which emerges from the valve should be constant independent of said pressure.
  • a pressure-reducing valve according to' the invention as described above is characterized in that a hydrostatically or pneumostatically journaled and axially movable piston is provided in the cylinder and is spring-loaded on one side limiting a first chamber on which side also the pressure of the supplies medium acts, the other side of the piston limiting a second chamber which communicates, through a gap which allows only passage of a turbulent flow, with the outlet connection.
  • the circumference of the piston is provided with axially extending slits which provide a variable passage determined by the position of the piston for the medium from the first chamber to a groove in the cylinder wall which is in open communication with the second chamber.
  • the flow conditions in the valve and the operation are further improved if, according to a further embodiment of the invention, the bottom of the slits at the area where they open into the groove in the cylinder wall, is streamlined and the transition angle to the cylinder and the groove wall corresponding therewith encloses an angle of approximately 60 with the centerline of the cylinder.
  • This wall comprises a circumferential groove 11, having a trapezoidal cross section, one side of said trapezoid extending at right angles to the cylinder wall and the other side also enclosing an angle of approximately 60 with the wall.
  • the piston 4 comprises a chamber 12 which communicates, through an aperture 13, both with a gap 23 between the piston 4 and the cylinder wall and with the groove 11.
  • an open duct 14 extends from the piston 3 through the rod 5 to and through the piston 4 to chamber 12; the groove 6 communicates with said duct through an aperture 15.
  • the device according to theinvention shown serves to regulate large quantities of medium which may be under a high pressure. Moreover, the device can very simply and easily be manufactured and gives very good results in practice.
  • a pressure-reducing valve for obtaining constant low pressure flow of large volume of medium, the density of said medium being independent of. the pressure applied thereto comprising, a cylinder forming a valve housing being closed at one end thereof, inlet means through the circumferential wall of said cylinder for supplying medium under pressure to said valve, outlet means through an end wall of said cylinder for passing medium away from said valve, first and second pistons hydrostatically journaled for axial movement within said cylinder, a piston rod connecting said first piston to said second piston, a first chamber formed between the inner end faces of said first and second pistons, said inlet means communicating with said first chamber so that medium under pressure is supplied thereto, a second chamber formed between the outer end face of said first piston and an orifice, said orifice communicating with said outlet means for permitting turbulent flow of medium from said second chamber to said outlet, a circumferential groove on the inner wall of said cylinder, said groove being in open communication with said second chamber, a plurality of axially extending slits provided on the surface of said
  • a pressure-reducing valve for obtaining constant lowpressure flow of medium comprising a valve housing being closed at one end thereof, an outlet port located at the other end, an inlet port located in a sidewall of said housing for supplying medium under pressure to said valve, piston means hydrostatically journaled for axial movement within said housing, a compression spring acting on one side of said piston means for urging said piston means away from said closed end, a first chamber communicating with said inlet port so that medium under pressure acts on said piston means, a second chamber formed between the other side of said piston means and said outlet port, an orifice for producing turbulent flow therethrough communicates between said second chamber and said outlet port, a groove in the inner surface of said housing in open communication with said second chamber, a plurality of slits longitudinally extending along the circumferential surface of said piston means, said slits communicating with said groove and providing a variable size passageway for said medium thereto, the size of said passageway dependent upon the position of said piston means within said housing.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Multiple-Way Valves (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Driven Valves (AREA)
US856635A 1968-09-18 1969-09-10 Pressure-reducing valve Expired - Lifetime US3596676A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6813307A NL6813307A (enrdf_load_html_response) 1968-09-18 1968-09-18

Publications (1)

Publication Number Publication Date
US3596676A true US3596676A (en) 1971-08-03

Family

ID=19804690

Family Applications (1)

Application Number Title Priority Date Filing Date
US856635A Expired - Lifetime US3596676A (en) 1968-09-18 1969-09-10 Pressure-reducing valve

Country Status (6)

Country Link
US (1) US3596676A (enrdf_load_html_response)
DE (1) DE1945786A1 (enrdf_load_html_response)
FR (1) FR2018347A1 (enrdf_load_html_response)
GB (1) GB1287592A (enrdf_load_html_response)
NL (1) NL6813307A (enrdf_load_html_response)
SE (1) SE349156B (enrdf_load_html_response)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5634490A (en) * 1988-04-07 1997-06-03 Palmer; David W. Process-chamber flow control system
US6751939B2 (en) 2002-06-25 2004-06-22 Honeywell International Inc. Flow divider and ecology valve
US20040244832A1 (en) * 2003-03-24 2004-12-09 Michael Sonnleitner Roll-over valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646078A (en) * 1947-09-18 1953-07-21 Denison Eng Co Flow control valve
US2790463A (en) * 1956-03-19 1957-04-30 Delano & Garner Mfg Co Flow regulator
CH417061A (fr) * 1963-03-11 1966-07-15 United Process Machinery Co Appareil portatif à produire de la mousse et procédé pour la mise en action de cet appareil
US3374803A (en) * 1965-06-17 1968-03-26 Treffle J. Leveque Volume and flow control device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646078A (en) * 1947-09-18 1953-07-21 Denison Eng Co Flow control valve
US2790463A (en) * 1956-03-19 1957-04-30 Delano & Garner Mfg Co Flow regulator
CH417061A (fr) * 1963-03-11 1966-07-15 United Process Machinery Co Appareil portatif à produire de la mousse et procédé pour la mise en action de cet appareil
US3374803A (en) * 1965-06-17 1968-03-26 Treffle J. Leveque Volume and flow control device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5634490A (en) * 1988-04-07 1997-06-03 Palmer; David W. Process-chamber flow control system
US6751939B2 (en) 2002-06-25 2004-06-22 Honeywell International Inc. Flow divider and ecology valve
US20050166572A1 (en) * 2002-06-25 2005-08-04 Futa Paul W.Jr. Flow divider and ecology valve
US7093420B2 (en) 2002-06-25 2006-08-22 Honeywell International Inc. Flow divider and ecology valve
US20040244832A1 (en) * 2003-03-24 2004-12-09 Michael Sonnleitner Roll-over valve

Also Published As

Publication number Publication date
GB1287592A (en) 1972-08-31
SE349156B (enrdf_load_html_response) 1972-09-18
FR2018347A1 (enrdf_load_html_response) 1970-05-29
DE1945786A1 (de) 1970-03-26
NL6813307A (enrdf_load_html_response) 1970-03-20

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