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WO1997018397A1 - Soupape d'alimentation et d'echappement pour demarrage lent - Google Patents

Soupape d'alimentation et d'echappement pour demarrage lent Download PDF

Info

Publication number
WO1997018397A1
WO1997018397A1 PCT/US1996/018700 US9618700W WO9718397A1 WO 1997018397 A1 WO1997018397 A1 WO 1997018397A1 US 9618700 W US9618700 W US 9618700W WO 9718397 A1 WO9718397 A1 WO 9718397A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
piston
exhaust
main
pilot
Prior art date
Application number
PCT/US1996/018700
Other languages
English (en)
Inventor
Frank T. Bohenick
Original Assignee
Wilkerson Corporation
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 Wilkerson Corporation filed Critical Wilkerson Corporation
Priority to AU10802/97A priority Critical patent/AU1080297A/en
Publication of WO1997018397A1 publication Critical patent/WO1997018397A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/068—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam with valves for gradually putting pneumatic systems under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
    • F15B13/0431—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the electrical control resulting in an on-off function
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/42—Actuating devices; Operating means; Releasing devices actuated by fluid by means of electrically-actuated members in the supply or discharge conduits of the fluid motor
    • F16K31/423—Actuating devices; Operating means; Releasing devices actuated by fluid by means of electrically-actuated members in the supply or discharge conduits of the fluid motor the actuated members consisting of multiple way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements

Definitions

  • the present invention relates to pilot actuated pressure fluid supply and exhaust valves More particularly, the present invention relates to a pilot actuated supply valve with slow start capabilities
  • a further object of the present invention is to provide an improved supply valve which enables a pneumatic system to build up pressure independently of the volume of air required for the system
  • Fig 1 is a vertical cross-section view through a valve embodying the present invention and showing the valve beginning its exhaust function
  • Fig 2 is a view similar to Fig 1 and showing the valve in the full exhaust position
  • Fig 3 is a view similar to Fig 1 and showing the valve in its initial slow start position with the exhaust valve partly closed
  • Fig 4 is a view similar to Fig 3 but showing the exhaust valve full ⁇ closed
  • Fig 5 is a view similar to Fig 4 but showing the main valve fully open
  • the present invention is embodied in a pilot actuated val ⁇ e mechanism 10 which includes emergency relief capabilities followed by a slow start function which pressurizes the fluid system independently of the volume of the svstem
  • a pilot actuated val ⁇ e mechanism 10 which includes emergency relief capabilities followed by a slow start function which pressurizes the fluid system independently of the volume of the svstem
  • the valve 10 is formed by a main start/stop valve housing 1 1 adapted for either direct connection to appropriate pressure fluid conduits such as air lines (not shown) or as a part of a modular system such as shown and desc ⁇ bed in U S Pat No 5,383,689
  • the valve housing 1 1 is secured to ad)o ⁇ n ⁇ ng modular fittings 12 by tracks 14 on the adjoining modular fittings 12 which slidablv engage in coacting slots in the valve housing 11 or v ice versa O- ⁇ ng seals 15 tightlv seal the units together
  • the valve 10 includes an emergency and pilot control exhaust valve housing 16 mounted on and securely and sealingly fastened to the stop/start valve housing 11
  • a three- way solenoid actuated pilot control valve 18 is operatively mounted on the exhaust valve housing 16 and receives control air from the main air supply line
  • the three-way solenoid actuated pilot control valve is of a standard construction and serves to control the operation of the emergencv stop slow start v alve 10 embodying the present invention
  • the start/stop valve housing 1 1 defines an inlet air chamber 20 tor receiving compressed air from any conventional compressed air system (not shown) and an outlet chamber 21 connected by appropriate conduit to v a ⁇ ous compressed air actuated appliances or devices (not shown)
  • the flow of air from the inlet chamber 20 to the outlet chamber 21 is controlled by a main flow control valve 22
  • the v alve is formed by a valve piston 23 slidingly and sealingly mounted in a cylinder 24 defined within the housing 1 1 , specificallv within a cap 30 threadably and sealingly engaged with the housing 1 1 and sealed thereto by an O- ⁇ ng 25
  • the valve piston 23 sealingly engages a v alv e seat 26 defined between the inlet chamber 20 and outlet chamber 21
  • An appropriate O- ⁇ ng seal 28 is provided on the face of the piston for seahngl v engaging the valve seat 26
  • a main valve spring 29 normally biases the main valve piston 23 to the closed position, and is retained within the valve housing 11 by the cap 30
  • Coextensive with said cylinder 24 in the cap 30 is a spring chamber 31 housing one end of the main valve spring 29 The other end of the spring 29 engages and pushes against the valve piston 23
  • the spring chamber 31 is open to the outlet chamber 21 through a central bore 32 in the main v alve piston 23 and a central bore 34 and port 35 defined in a main valve piston rod 36 secured to the valve piston 23 and extending through the outlet chamber 2 1 for engagement by a control piston assembly 38 housed within the exhaust valve housing 16
  • the exhaust valve housing 16 defines an exhaust chamber 40 connected to an exhaust outlet fitting 41 and housing an exhaust valve piston 42 adapted for sealing engagement with an exhaust valve seat 44 defined in the main valve housing 11 between the outlet chamber 21 and exhaust chamber 40
  • An appropriate O- ⁇ ng seal 45 on the exhaust valv e piston 42 provides a seal between the piston 42 and seat 44
  • the exhaust valve piston 42 is actuated bv pilot air from the pilot control valve 18
  • the valve housings 1 1 and 16 define pilot air passages 48 49 extending from the inlet chamber 20 to an adjustable orifice assembly 50 and outlet pilot passage 51 connected to the three-way control valve 18 for supplying pilot air to the three-way control valve 18 and an exhaust valve control chamber 56 defined within the exhaust valve housing 16
  • the adjustable orifice 50 is formed by a needle valve 52 positionable with respect to an orifice 54
  • the exhaust valve housing 16 also defines a pilot air control passage 55 opening into the control chamber 56 defined in the housing 16 on the opposite end of the exhaust valve piston 42 for supplying controlled pilot pressure fluid from the three-way valve 18
  • the exhaust valve piston 42 is slidingly mounted in the control chamber 56 and sealed thereto by an O- ⁇ ng 58 application of control pilot pressure fluid from the three-way valve 18 to the exhaust valve control chamber 56 seats the exhaust valve piston 42 against the valve seat 44 to prevent the exhaustion of air from the outlet chamber 21
  • valve 10 is shown with the main valve fully open and the exhaust valve shut in Fig 5 Upon release of the pilot pressure from the pi lot control chamber 56, air pressure in the outlet chamber 21 forces the exhaust v alve piston 42 off of the seat 44, as is shown in Fig 1 and then Fig 2 and compressed air exhausts from the outlet chamber 21 and air system through the exhaust valve fitting 41 to the atmosphere
  • the present invention utilizes a control pilot pressure actuated assembly 38 adapted to produce a slow start in repressu ⁇ zing the system
  • the slow start piston assembly 38 regulates the outlet pressure up to the inlet line pressure in chamber 20 through the main valve 22 so that the air pressure is built up gradually within the outlet chamber 21 and the downstream system
  • the exhaust valve piston 42 defines a centra! chamber 60 open at one end to the control chamber 56 and open at its other end to the outlet chamber 21 for providing a slow start function to the main valve 22
  • a pair of opposed pistons, a pilot drive piston 61 and a d ⁇ ven piston 62 are slidingly housed within the control chamber 60, being slidingly sealed thereto bv O- ⁇ ngs 64 65, and biased apart by a coil spring 66 for actuating the main control v alve 22
  • the d ⁇ ve piston 61 is positioned at the end of the chamber 60 open to the pilot air control chamber 56 and presents a larger surface area than the area of the driven piston 62 open to the outlet chamber 21.
  • the latter piston 62 operatively engages the valve rod 36 from the main valve piston 23 of the main control valve 22. By pushing on that rod 36, the piston 62 effects opening of the control valve 22 to allow compressed air to flow through the valve 22 from the inlet chamber 20 to the outlet chamber 21
  • the slow startup begins as shown in Fig. 2
  • the pilot valve 18 When the pilot valve 18 is energized, permitting inlet air pressure to pass through passages 48, 49, through the valve 18, and passage 55 to the control volume 56, the exhaust valve begins to close as shown in Fig. 3
  • the pilot piston 61 When the exhaust valve is completely closed as shown in Fig 4, the pilot piston 61 is pressed downward until it pushes against the driven piston 62, in turn pushing on the main valve piston rod 36 Rod 36 in turn pushes the main piston 23 downward, opening the main valve 22, as is shown in Fig. 5
  • valve of the present invention incorporates an internal control volume to provide slow start continuously up to 100% of the inlet air pressure
  • This internal control volume provides a pressure feedback system during slow start
  • the valve slow start in accordance with the invention is pressure dependent and volume independent
  • the pressu ⁇ zation of the downstream system thus occurs slowly, thus eliminating pressure spikes
  • the rate of pressure increase during slow start is controlled by the rate of air permitted into the internal control volume 56 bv needle valve 52

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

La présente invention concerne une soupape (10) destinée à commander l'admission et l'échappement d'air comprimé dans un système pneumatique. Cette soupape comprend une soupape de commande principale (22) normalement fermée, actionnée par pilote, et un piston (42) pour soupape d'échappement, actionné par pilote. Un dispositif de commande de soupape (38) actionné par un pilote ouvre et ferme la soupape principale (22) de manière répétée, pendant le démarrage du système, en réaction à l'accroissement de la pression dans le système indépendamment de son volume, jusqu'à ce que cette pression soit équilibrée.
PCT/US1996/018700 1995-11-13 1996-11-13 Soupape d'alimentation et d'echappement pour demarrage lent WO1997018397A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU10802/97A AU1080297A (en) 1995-11-13 1996-11-13 Slow start supply and exhaust valve

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US642795P 1995-11-13 1995-11-13
US60/006,427 1995-11-13
US74497896A 1996-11-07 1996-11-07
US08/744,978 1996-11-07

Publications (1)

Publication Number Publication Date
WO1997018397A1 true WO1997018397A1 (fr) 1997-05-22

Family

ID=26675617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/018700 WO1997018397A1 (fr) 1995-11-13 1996-11-13 Soupape d'alimentation et d'echappement pour demarrage lent

Country Status (2)

Country Link
AU (1) AU1080297A (fr)
WO (1) WO1997018397A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884513A3 (fr) * 1997-06-09 1999-03-24 Bürkert Werke GmbH & Co. Combinaison de soupape
WO2008040411A1 (fr) * 2006-09-29 2008-04-10 Festo Ag & Co. Kg Ensemble distributeur à fonction de mise en pression progressive
EP1845294A3 (fr) * 2006-04-13 2008-06-11 Honeywell International Inc. Soupape de commutation guidée pneumatique de deuxième étage
WO2009021962A3 (fr) * 2007-08-16 2009-06-25 Hoerbiger Automatisierungstech Agencement de soupape
CN108425832A (zh) * 2018-01-25 2018-08-21 温州曼哲科技有限公司 一种空气压缩机常闭进气阀

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561464A (en) * 1984-11-07 1985-12-31 Roanoke College Relay valve
US5067519A (en) * 1990-11-26 1991-11-26 Ross Operating Valve Company Safety valve for fluid systems
US5337788A (en) * 1993-10-22 1994-08-16 Robertshaw Controls Company Pneumatic valve with slow start and quick exhaust

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561464A (en) * 1984-11-07 1985-12-31 Roanoke College Relay valve
US5067519A (en) * 1990-11-26 1991-11-26 Ross Operating Valve Company Safety valve for fluid systems
US5337788A (en) * 1993-10-22 1994-08-16 Robertshaw Controls Company Pneumatic valve with slow start and quick exhaust

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884513A3 (fr) * 1997-06-09 1999-03-24 Bürkert Werke GmbH & Co. Combinaison de soupape
US5975486A (en) * 1997-06-09 1999-11-02 Burkert Werke Gmbh & Co. Valve combination
EP1845294A3 (fr) * 2006-04-13 2008-06-11 Honeywell International Inc. Soupape de commutation guidée pneumatique de deuxième étage
WO2008040411A1 (fr) * 2006-09-29 2008-04-10 Festo Ag & Co. Kg Ensemble distributeur à fonction de mise en pression progressive
WO2009021962A3 (fr) * 2007-08-16 2009-06-25 Hoerbiger Automatisierungstech Agencement de soupape
CN108425832A (zh) * 2018-01-25 2018-08-21 温州曼哲科技有限公司 一种空气压缩机常闭进气阀

Also Published As

Publication number Publication date
AU1080297A (en) 1997-06-05

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