US3669137A - Fluid actuated piston valve - Google Patents

Fluid actuated piston valve Download PDF

Info

Publication number
US3669137A
US3669137A US63861A US3669137DA US3669137A US 3669137 A US3669137 A US 3669137A US 63861 A US63861 A US 63861A US 3669137D A US3669137D A US 3669137DA US 3669137 A US3669137 A US 3669137A
Authority
US
United States
Prior art keywords
piston
valve
port
fluid pressure
actuating fluid
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
US63861A
Other languages
English (en)
Inventor
Colin John Kirk
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3669137A publication Critical patent/US3669137A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401Valve members; Fluid interconnections therefor
    • F15B13/0402Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/20Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/2496Self-proportioning or correlating systems
    • Y10T137/2559Self-controlled branched flow systems
    • Y10T137/265Plural outflows
    • Y10T137/2668Alternately or successively substituted outflow
    • Y10T137/2688Flow rate responsive
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86389Programmer or timer
    • Y10T137/86445Plural, sequential, valve actuations
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86493Multi-way valve unit
    • Y10T137/86574Supply and exhaust
    • Y10T137/86582Pilot-actuated
    • Y10T137/8659Variable orifice-type modulator

Definitions

  • Said one port is connected to an end portion of the housing adjacent the relevant end face of the piston through a restricted passage and a closable control orifice leads from the passage between the restriction therein and said end portion of the housing, the control orifice being openable to prevent the actuating fluid pressure from rising sufiiciently to effect movement of the piston in said other direction and closable to permit the actuating fluid pressure to .reach a value sufficient to efiect movement of the piston in said other direction when said movement is to be effected.
  • the invention relates to a piston valve of the kind comprising a housing having a plurality of ports in its peripheral wall between which theflow of fluid is controlled by a piston in the housing, the piston being movable longitudinally of the hous ing between two operative positions, in each of which at least some of said ports are interconnected in different pairs through passages in said piston, by actuating fluid pressure applied to one or other end of the piston according to the direction of movement required.
  • An object of the invention is to provide a piston valve of the foregoing kind in which the actuating fluid supply is self-cancelling when the actuating fluid pressure hasincreased sufficiently to move the piston valve.
  • a piston valve comprises a housing having a plurality of ports in its peripheral wall between which flow of fluid is controllable by a piston in the housing, the piston being movable longitudinally of the housing between two operative positions in each of which at least some of said ports are interconnected in different pairs through passages in said piston, by actuating fluid pressure applied to the end of said piston appropriate to the movement required,
  • the actuating fluid pressure for effecting the movement in one direction being applied from a source externally of the valve and the actuating fluid pressure for effecting movement in the other direction being derived from one of said ports when said piston has been moved in said one direction
  • said one port being connected to an end portion of the housing adjacent the relevant end face of the piston through a restricted passage, a closable control orifice leading from said passage between the restriction therein and said end portion of the housing, the control orifice being openable to prevent the actuating fluid pressure from rising sufficiently to effect movement of the piston in said other direction and closable to permit the actuating fluid pressure to reach a value sufficient to efiect movement of the piston in said other direction when said movement is to be effected.
  • said ports there are at least three said ports in said housing, these ports being respectively an inlet port to which a fluid to be controlled by the valve is connected, an outlet port for said fluid and said one port, the piston having a passage therein which in one operative position of the piston interconnects said inlet port with said outlet port to permit flow of said fluid through the valve and in the other operative position in terconnects said inlet port with said one port, instead of said outlet port, thereby interrupting flow of said fluid through the valve and instead providing the actuating fluid pressure for effecting movement of said piston in said other direction when said control orifice is closed.
  • the housing may have other inlet and outlet ports arranged to be'interconnected by passages in said piston, where desired.
  • At least a pair of piston valves as set out in either of the two immediately preceding paragraphs may be so interconnected that an outlet port of one of the valves provides the actuating fluid pressure for effecting movement of the piston of the or another of the valves in said one direction and an outlet port of said other of the valves is connected to an inlet port of said one or yet another valve, said inlet port being connected through the piston of that valve to said one port thereof to provide the actuating fluid pressure for effecting movement of the piston thereof in said other direction.
  • FIG. 1 shows a conventional piston valve
  • FIGS. 2A and 28 respectively show a valve in accordance with the present invention in its two operating positions
  • FIGS. 3, 4 and 5 are diagrams'illustrating the sequential operation of the valve shown in FIG. 2 in moving from one operating position to the other, and
  • FIG. 6 is a diagram showing four valves of the kind shown in FIG. 2 interconnected for automatic operation in sequence.
  • the conventional valve comprises a housing 1 containing a piston (not shown) which is movable between two operative positions in accordance with actuating fluid pressure applied at either the end 2 or 3 in accordance with the direction of movement required.
  • the housing 1 is provided with inlet and outlet ports A, B, C andD which are interconnected in pairs through passages in the piston depending upon which operating position the piston is in.
  • the piston is moved in the direction of the end 2 by fluid pressure applied from an external source to the end 3 and it is moved towards the end 3 by fluid pressure applied at the end 2.
  • the fluid pressure applied to the end 2 is derived from a source4 admitted by means of a control valve 5 to a passage 6 containing a fixed restriction 7.
  • the valve in accordance with this invention comprises a housing 11 having end portions 12 and 13 and inlet and outlet ports A, B, C and D all similar to the corresponding ports in the conventional valve of FIG. 1.
  • the housing has an additional outlet port F (the aforesaid one" port) and also has an outlet port E.
  • the outlet port F is connected by a passage 16 containing a fixed restrictor 17 to the end portion 12 of the housing 11.
  • a control orifice 18 leading to atmosphere is connected between the fixed restrictor l7 and the end 12 similarly to the control orifice :8 as shown in FIG. I.
  • FIGS. 3, 4 and 5 the valve shown in FIG. 2 is again illustrated and furthermore the connections between ports through the piston in one operative position thereof have been indicated by full lines and the alternative connections between ports through the piston in the other operative position thereof have been indicated by broken lines.
  • the operating orifice 18 has been indicated as a two-port control valve. In one extreme position of operation to which the piston has been moved by actuating fluid pressure applied at the end 13 is shown in FIG. 3 and in this position an inlet port A is connected to an outlet port 8; an inlet port D is connected to an outlet port E and an inlet port C is connected to the outlet port F which leads to the passage 16. As shown in FIG.
  • the port 18 is open and therefore the fluid applied through the port C leads to atmosphere and the pressure at the end 12 of the housing 11 is substantially atmospheric.
  • the control valve 18 is closed and therefore the pressure in the passage 16 increases until it has reached a value sufficient to move the piston to the left as shown in FIG. 4 until the port B is connected to the port E and the port C is connected to the port D.
  • the port C will be in contact with both ports D and F as shown in FIG. 4.
  • the port connections will be as shown in FIG. 5 and there will be no actuating fluid applied from the port C to the port F.
  • the valve shown in FIGS. 2 to 5 may conveniently be interconnected with at least two other valves. If, for example three such valves to be used, they may be so interconnected that an outlet port D of one of the valves provides the actuating fluid pressure applied at the end 13 of another of the valves for effecting movement of the piston thereof in one direction and an outlet port B of the other of the valves is connected to an inlet port C of said one valve and through the piston thereof to said one port F thereof to provide the actuating fluid pressure applied at the end 12 of the housing thereof for effecting movement of the piston of said one valve in said other direction.
  • FIG. 6 shows how four valves in accordance with the invention can be so interconnected as to give automatic operation alternately of two cylinders and 21.
  • the port A is connected to a source of pressure fluid and port E is an exhaust port to atmosphere.
  • the port C of each valve is connected to the port B of the next valve in sequence; that is port B of valve b+ is connected to port C of b; port B of valve a is connected to port C of valve b+; port B of valve (1+ is connected to port C of valve aand port B of valve bis connected to port C of valve a+.
  • Port D of valve b+ is connected to one end of a two-position valve 22 controlling cylinder 20 and to the end 13 of valve a+.
  • Port D of valve a is connected to the opposite end of valve 22 and to the end 13 of valve b.
  • Port D of valve a+ is connected to the end 13 of valve b+ and to one end of a valve 23 controlling cylinder 21.
  • Port D of valve bis connected via an on/off control valve 24 to the end 13 of valve aand to the opposite end of valve 23.
  • the control orifices 18 of each valve are indicated by the same reference letters as the valves; i.e. b+, a, 0+ and b.
  • valve 0- and a+ are controlled differentially by a common closure member 25 movable by means of the piston of cylinder 20 and the orifices 18 associated with valves b+ and bare controlled differentially by a common closure member 26 actuated by the piston of cylinder 21.
  • the operation of the circuit is as follows: first the on/off control valve 24 is placed in the on position in which flow between the port D of valve band the control valve 23 is completed and the latter is moved to the opposite position to that illustrated. A pressure signal is then fed through the valve 23 causing cylinder 21 to move from the illustrated position into a position in which the closure member 26 will close the orifice 18 associated with valve b+. At the end of that movement, the valve b+ will be operated by pressure applied at the end 12 thereof and port C will be connected to port D and port B to port E. This will cause a pressure signal to be fed from port C to port D of valve 1H- causing actuation of valve 22 controlling the cylinder 20, thereby causing the closure member 25 to close the orifice 18 associated with valve a.
  • valve a is moved in the direction causing ports C and C and B and E thereof to be connected and thereby causing valve 22 to be reversed and to move cylinder 20 to the position in which the closure member 25 again closes orifice 18 of valve a+.
  • This causes operating pressure to be applied to the end 12 of valve a+ causing port C to be connected to port D and port B to be connected to port E.
  • a signal is then fed through port C to port D of valve a+ to effect reversal of valve 23 to cause the closure member 26 of cylinder 21 to be moved to cover the orifice 18 associated with valve lrand also to cause valve 17+ to be reset to the illustrated position in which port A is to be connected to port B, port D to be connected to port E and port C to be connected to port F.
  • the bvalve is then set to the position illustrated and a pressure signal is fed through port C to port D of valve bto pass a signal to the on/off control valve 24 and to reset valve ato the position in which port B is connected to port E and port C is connected to port D.
  • a piston valve comprising a housing having a longitudinally-extending bore therein, a plurality of ports in the peripheral wall of said housing and communicating with said bore, a piston slidable longitudinally in the bore in the housing between two operative positions in each of which at least some of said ports are interconnected in different pairs through passages in said piston, means for applying a different source of actuating fluid pressure to respective ends of said piston, whereby the application of one of the sources of actuating fluid pressure to the end of said piston appropriate to the movement required will effect movement of the piston from one operative position to the other, wherein the improvement comprises one of said means for applying actuating fluid pressure for effecting the movement in one direction derives its fluid pressure from a source externally of the valve, and the other of said means for applying the actuating fluid pressure for effecting movement in the other direction comprises duct means communicating with one port to which a fluid pressure is applied from a source externally of the valve, said one port being one of one of said pairs of ports, through one of said passages in said
  • a piston valve as claimed in claim 1 in which the housing has at least three ports therein, the ports being respectively an inlet port to which a fluid to be controlled by the valve is connected, an outlet port for said fluid and said one port, one of said passages in the piston in one operative position of the piston interconnecting said inlet port with said outlet port to permit flow of said fluid through the valve and in the other operative position interconnecting said inlet port with said one port, instead of said outlet port, thereby interrupting flow of said fluid through the valve and instead providing the actuating fluid pressure for effecting movement of said piston in said other direction when said control orifice is closed.
  • a piston valve as claimed in claim 2 having further inlet and outlet ports interconnectable by another of said passages 6 in the piston.
  • a fluid circuit including four piston valves as claimed in claim 2, said piston valves being so interconnected that an outlet port of a first of said valves provides the actuating fluid pressure for effecting movement of the piston of a second of said valves in said one direction and an outlet port of a third of said valves is connected to an inlet port of a fourth of said valves, said inlet port being connected through the piston of said fourth valve to said one port thereof to provide the actuating fluid pressure for effecting movement of the piston thereof in said other direction, the circuit also including valve means for opening and closing the control orifices of the four piston valves in sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Multiple-Way Valves (AREA)
  • Sliding Valves (AREA)
  • Fluid-Driven Valves (AREA)
  • Braking Arrangements (AREA)
US63861A 1969-08-26 1970-08-14 Fluid actuated piston valve Expired - Lifetime US3669137A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4240369 1969-08-26

Publications (1)

Publication Number Publication Date
US3669137A true US3669137A (en) 1972-06-13

Family

ID=10424259

Family Applications (1)

Application Number Title Priority Date Filing Date
US63861A Expired - Lifetime US3669137A (en) 1969-08-26 1970-08-14 Fluid actuated piston valve

Country Status (6)

Country Link
US (1) US3669137A (es)
JP (1) JPS4914812B1 (es)
DE (1) DE2041869A1 (es)
FR (1) FR2059192A5 (es)
GB (1) GB1289995A (es)
NL (1) NL160921C (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4757744A (en) * 1984-12-20 1988-07-19 Valeo Apparatus for controlling flaps in an installation for heating and ventilating or for air-conditioning a motor vehicle

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5130320U (es) * 1974-08-29 1976-03-04
JPS5261934U (es) * 1975-10-31 1977-05-07
SE436514B (sv) * 1981-08-20 1984-12-17 Atlas Copco Ab Stegregister for tryckfluidumsystem
EP1838982B1 (en) * 2005-01-10 2008-12-10 Inergy Automotive Systems Research (Société A.) Electronically controlled electromechanical valve
US8973382B2 (en) * 2012-04-17 2015-03-10 Lee Wa Wong Energy efficient air heating, air conditioning and water heating system
WO2023008494A1 (ja) * 2021-07-28 2023-02-02 デュプロ精工株式会社 シートの折り装置および吸着切替ユニット

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625136A (en) * 1950-04-26 1953-01-13 Research Corp Electrohydraulic servo mechanism
US2934765A (en) * 1953-09-21 1960-04-26 Ex Cell O Corp Flow control servo valve
US3055383A (en) * 1955-11-01 1962-09-25 Ii William A Paine Electro-hydraulic servo systems
US3457941A (en) * 1965-10-04 1969-07-29 Hypro Inc Unloader valve
US3509899A (en) * 1963-05-01 1970-05-05 Carl E Hewson Heart and lung resuscitator
US3565114A (en) * 1968-02-16 1971-02-23 Philips Corp Fluidic program device for automatic sequential control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625136A (en) * 1950-04-26 1953-01-13 Research Corp Electrohydraulic servo mechanism
US2934765A (en) * 1953-09-21 1960-04-26 Ex Cell O Corp Flow control servo valve
US3055383A (en) * 1955-11-01 1962-09-25 Ii William A Paine Electro-hydraulic servo systems
US3509899A (en) * 1963-05-01 1970-05-05 Carl E Hewson Heart and lung resuscitator
US3457941A (en) * 1965-10-04 1969-07-29 Hypro Inc Unloader valve
US3565114A (en) * 1968-02-16 1971-02-23 Philips Corp Fluidic program device for automatic sequential control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Martonair Ltd.; Control Engineering; September, 1963; pages 143 145 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4757744A (en) * 1984-12-20 1988-07-19 Valeo Apparatus for controlling flaps in an installation for heating and ventilating or for air-conditioning a motor vehicle

Also Published As

Publication number Publication date
NL160921C (nl) 1979-12-17
JPS4914812B1 (es) 1974-04-10
DE2041869A1 (de) 1972-03-02
GB1289995A (es) 1972-09-20
FR2059192A5 (es) 1971-05-28
NL160921B (nl) 1979-07-16
NL7012418A (es) 1971-03-02

Similar Documents

Publication Publication Date Title
US4319609A (en) Five-position hydraulic actuating apparatus
US3129645A (en) Electrically modulated fluid valve
US3669137A (en) Fluid actuated piston valve
DE3175531D1 (en) Electro-hydraulic control system
US3474828A (en) Fluid control switching arrangements
GB1387367A (en) Control device for an hydraulically actuated implement
US3540477A (en) Pneumatic supply-exhaust circuit
US3643699A (en) Torque motor operated valve
GB1308091A (en) Fluid logic switching circuits
GB1236861A (en) Improvements in or relating to bistable pneumatic cells
US4530636A (en) Device for operating a hand of an industrial robot
CS209842B2 (en) Valve for the alternating supply of the pressure medium
US3296941A (en) Logic control system
GB1291888A (en) Improvements in or relating to the electrohydraulic remote control of hydraulic control valves
US3789864A (en) Fluid operated system
GB1033109A (en) Control valves for fluid-pressure-operated mechanisms
GB1282947A (en) Improvements in hydraulic motor control devices
GB985308A (en) Improvements in or relating to fluid pressure control valves
US3218938A (en) Control fault veto
GB1413622A (en) Flow control valve system with single spool second
US3812881A (en) Fluid responsive control valves
US3164064A (en) Fluid-actuated servomechanism with multiple inputs
SU1578280A1 (ru) Гидропривод экскаватора
GB1381896A (en) Power assist mechanisms for fluid control valves
GB1291311A (en) Machine having a fluid operated boom or other movable member