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WO1997004262A1 - Soupape hydraulique pilotee de fermeture - Google Patents

Soupape hydraulique pilotee de fermeture Download PDF

Info

Publication number
WO1997004262A1
WO1997004262A1 PCT/DE1996/001263 DE9601263W WO9704262A1 WO 1997004262 A1 WO1997004262 A1 WO 1997004262A1 DE 9601263 W DE9601263 W DE 9601263W WO 9704262 A1 WO9704262 A1 WO 9704262A1
Authority
WO
WIPO (PCT)
Prior art keywords
control
pilot
bore
piston
control piston
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.)
Ceased
Application number
PCT/DE1996/001263
Other languages
German (de)
English (en)
Inventor
Werner RÖMER
Wilhelm Wolf
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.)
Tiefenbach GmbH
Original Assignee
Tiefenbach GmbH
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 Tiefenbach GmbH filed Critical Tiefenbach GmbH
Priority to DE19680592T priority Critical patent/DE19680592D2/de
Publication of WO1997004262A1 publication Critical patent/WO1997004262A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
    • 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
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
    • 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
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1223—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being acted upon by the circulating fluid

Definitions

  • the invention relates to a pilot-operated hydraulic closing valve according to the preamble of claim 1, which is particularly suitable as a closing valve for systems with accumulators.
  • a valve seat is arranged in the control bore between two ports A and B opening in a control bore and is opened or closed by means of a control piston.
  • a control pressure present outside the control bore in a pilot control chamber is acted upon or relieved of pressure.
  • the sealing surface of the valve seat is attached to the side facing the inlet.
  • the control piston penetrates the valve seat with its piston shaft and has a sealing surface attached to the end collar, which lies opposite the central collar of the control piston.
  • the control piston and the valve seat cooperate with the closing direction in the direction A to B.
  • a pressurized operating medium in the inlet A in the direction of flow from A to B holds the control piston with its sealing surface in the valve seat, the operating pressure being present on the seating surface F1. This causes the valve to close automatically.
  • the connection between inlet A and outlet B can only be released by external force acting on the control piston.
  • the hydraulic closing valve according to the invention can be used advantageously in particular in hydraulic systems with high safety requirements. Malfunctions occurring in the pre-control e.g. in the event of a line break in a hydraulic pilot control, the only result is that the hydraulic closing valve moves into the closed position.
  • the seat cross-section F1 and the cross-section of the central collar F2 on the control piston are designed such that when pressure is applied in port A and / or port B, the valve always closes the connection between ports A and B.
  • This alternative can advantageously be connected between an accumulator and a consumer, since this prevents the accumulator from leaking, which can contain up to 40,000 l, in the event of a fault.
  • the valve also has the advantage that the direction of flow can be reversed without affecting the switch position.
  • the embodiment according to claim 4 has the advantage that the hydraulic closing valve can only be switched when an external force is applied or released to the control piston. A change in the persistent switching position can therefore only be carried out by switching a pilot control device.
  • the development according to claim 5 represents a special advantageous combination with a hydraulic pilot control.
  • the control piston is actuated via a pilot control collar which can be acted upon by a pressure medium.
  • the development according to claim 8 offers the advantage that the hydraulic pilot control can be operated independently of the system with another operating medium.
  • a throttle gap is formed directly on the valve seat to avoid pressure surges.
  • the design of the hydraulic closing valve according to claim 12 has the advantage that in the operating state in which the ports A and B are depressurized, the control piston is brought into a predefined switching position.
  • the pilot control can advantageously be carried out hydraulically, pneumatically or electromagnetically and hydraulically.
  • FIG. 1 shows a hydraulic closing valve according to the invention in the open switching position
  • Fig. 2 hydraulic closing valve from Fig. 1 in the closed Switch position
  • FIG. 3 shows a hydraulic closing valve according to the invention with hydraulic pilot control in the open switch position
  • FIG. 5 shows a pilot-operated hydraulic closing valve with connections A and B and a spring-loaded control piston.
  • FIG. 1 and FIG. 2 show a hydraulic closing valve according to the invention in the open and closed switching position.
  • the hydraulic closing valve consists of a valve housing 1.
  • a control bore 2 is made as a blind bore.
  • the connection bore 30 opens from the inlet connection A.
  • the connection bore 31 of the outlet connection B opens into the control bore 2.
  • a valve seat is concentric in the control bore 4 with the sealing surface 40, which is attached to the side of the valve seat 4 facing the connection A.
  • a control piston 3 is arranged in the control bore 2 and is sealingly guided with a central collar 8 in the valve housing 1 and thus blocks the control bore 2 on the end adjacent to the connection B.
  • the central collar 8 is connected to a piston shaft 41 which penetrates the valve seat 4 in such a way that an annular gap is formed between the piston shaft 41 and the valve bore 28.
  • an annular chamber 6 is formed in the control bore 2 between the control piston 3 and the valve housing 1.
  • the connection bore 31 of the outlet connection B opens into this annular chamber 6.
  • the end collar 9 with a sealing surface 20 is attached to the piston skirt 41 on the side opposite the central collar 8.
  • the sealing surface 20 is arranged on the side of the end collar 9 facing the central collar 8.
  • valve seat 4 lie opposite one another, so that valve seat 4 and control piston 3 cooperate in such a way that the hydraulic closing valve closes when the flow connection from inlet port A to outlet port B closes.
  • the control piston 3 is controlled by means of a pilot control device 42.
  • FIG. 1 shows the hydraulic closing valve in the open switch position.
  • the operating pressure is present on the cross-sectional area F2 of the central collar.
  • the opening force of the pilot control device 42 acting on the control piston 3 is thus greater than the surface load on surface F2, so that a gap is formed between the sealing surfaces 40 and 20, which connects the annular chamber 6 to a pressure chamber 39.
  • FIGS. 3 to 5 each describe exemplary embodiments of a hydraulic closing valve according to the invention with hydraulic pilot control.
  • FIGS. 3 to 5 Unless otherwise stated, the following description relates to FIGS. 3 to 5.
  • the hydraulic closing valve consists of the housing 1.
  • a stepped control bore 2 is designed as a blind hole, a connection bore 30 of the connection A opening into the closed end of the control bore 2.
  • the open end of the control bore 2 opens concentrically into a pilot bore 26, which has a larger diameter than the control bore 2.
  • the control bore 2 has the bore sections 27 and 28, the step being designed such that the bore section 28 also includes smaller diameter than the bore section 27 is enclosed by the bore sections 27.1 and 27.2.
  • the valve seat 4 is rotated concentrically to the control bore 2 on the housing 1.
  • a multiply stepped control piston 3 is arranged such that it is guided with a pilot collar 7 formed at one end in the pilot bore 26 and with a central collar 8 in the bore section 27 of the control bore 2 adjacent to the pilot bore 26.
  • An annular gap 19 is formed between the bore section 28 and the concentric control piston 3 guided to the bore section.
  • the other end of the control piston 3 extends concentrically into a pressure chamber 39, the control piston having an end collar 9 at the end.
  • the end collar 9 has turned a sealing surface 20 directed toward the central collar 8, which corresponds to the valve seat 4.
  • the seat surface of the control piston 3 or the valve seat 4 forms the control surface F1.
  • the end face on the pilot control collar 7 forms the pilot control surface F3.
  • connection bore 31 of the connection B opens via the connection bore 5 into the annular chamber 6, which is formed between the bore section 27.1 and the control piston 3.
  • the annular chamber 6 is delimited on one side by the step of the bore sections 27 and 28 or the valve seat 4 and on the opposite side by the central collar 8 of the control piston 3.
  • the cross section of the central collar 8 forms a control surface F2 on the control piston 3.
  • connection between the connection A and the connection B is open in the position shown in FIG. 3.
  • the annular chamber 6 is connected to the pressure chamber 39 via the annular gap 19.
  • a pilot chamber 10 is formed between the pilot collar 7 and a cover 29 of the pilot bore 24.
  • the pilot chamber 10 is connected to a pilot line 21 by means of the bore 11.
  • the pilot line 21 is connected to the pilot valve 12.
  • the pilot valve is connected to port X on a pressure source and port Y to a tank.
  • the pilot valve 12 releases the connection between the pilot line 21 with the pressure source or the tank by switching.
  • the pilot control line 21 is acted upon by a control pressure, so that the pilot control surface F3 is acted upon by the control pressure. Due to the design that the control surface F3 is larger than the control surface F2, a resulting actuating force is generated on the control piston against the closing direction, the closing direction being equal to the flow direction from port A to port B.
  • the control piston 3 is axially up to a stop 18 between the pilot bore 26 and control bore 2 shifted.
  • the connection between the connections A and B is established by means of an annular chamber 6, an annular gap 19 and a pressure chamber 39.
  • the control piston 3 has millings 17 which enlarge the flow cross section of the annular gap 19 between the control bore 2 and the control piston 3.
  • a vent hole 14 opens into a vent chamber 13, which is formed between the pilot bore 26 and the control piston (FIG. 4).
  • the seal 15 is arranged in a groove 35 in the housing between the pilot chamber 10 and the ventilation chamber 13.
  • the seal 16 is arranged in the groove 36 in the housing 1 between the annular chamber 6 and the ventilation chamber 13.
  • the vent hole 14 is connected to the leak line 37 and ensures that leaks are discharged to the tank 38 both from the area of the annular space 6 and from the pilot chamber 10. With this measure, the pilot control can be operated with an operating medium that is different from the system.
  • connection A is moved by 90 °, so that the connection bore 30 advantageously opens coaxially into the control bore 2.
  • the pilot line 21 is depressurized, so that the pilot surface F3 on the control piston 3 remains unloaded.
  • the operating pressure in port A now acts on the control surface Fl.
  • the actuating force generated at Fl acts in the closing direction.
  • the control piston lies with the sealing surface 20 on the end collar 9 on the sealing surface 40 of the valve seat 4. The connection between the annular gap 19 or the annular chamber 6 and the pressure chamber 39 is blocked.
  • the position of the control piston 3 remains unchanged until the pilot valve 12 is reversed so that the pilot chamber 10 is reconnected to the pressure source.
  • the control piston also remains in the closed state changing pressure ratio in ports A and B.
  • the operating pressure in port A acts on the control surface Fl of the control piston.
  • the operating pressure in port B has a resultant effect on the control surface (F2-Fl) of the control piston. Closing actuating forces are generated in both cases. Even pressure pulsation in the system connected in A and / or B has no effect on the switch position.
  • control piston has a pin 22 on the pilot side, which projects beyond the housing 1.
  • the pin 22 has a recess 33 so that a compression spring 24 is arranged between the cover 29 and the undercut 23.
  • the pin 22 with the compression spring 24 is covered by a cap 25.
  • the control piston closes the valve seat 4 even when the connections A and B are depressurized, in which the compression spring 24 between the control piston 3 and the housing 1 generates an actuating force which axially displaces the control piston.
  • pilot valve 12 can be actuated hydraulically, pneumatically or electromagnetically.

Landscapes

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

Abstract

L'invention concerne une soupape hydraulique de fermeture comprenant deux canaux de raccordement (A et B) qui débouchent dans un alésage de commande (2). Un siège de soupape (4) est placé dans l'alésage de commande, entre les canaux de raccordement (A et B). La tige de piston (41) d'un piston de commande (3) guidé de façon concentrique dans l'alésage de commande traverse le siège de soupape. A une extrémité de sa tige, le piston de commande est pourvu d'un collier central (8) qui obture l'alésage de commande à l'extrémité adjacente et est guidé dans le corps de soupape de façon étanche. A l'extrémité opposée de sa tige, le piston de commande comporte un collier terminal (9) pourvu d'une surface d'étanchéité (20) tournée du côté du collier central, cette surface d'étanchéité correspondant à une face d'étanchéité (40) du siège de soupape qui est en vis-à-vis du canal de raccordement (A), de sorte que le piston de commande et le siège de soupape coopèrent dans le sens de la fermeture de (A) vers (B).
PCT/DE1996/001263 1995-07-18 1996-07-12 Soupape hydraulique pilotee de fermeture Ceased WO1997004262A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19680592T DE19680592D2 (de) 1995-07-18 1996-07-12 Vorgesteuertes Hydraulikschließventil

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19526105.4 1995-07-18
DE19526105 1995-07-18

Publications (1)

Publication Number Publication Date
WO1997004262A1 true WO1997004262A1 (fr) 1997-02-06

Family

ID=7767096

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/001263 Ceased WO1997004262A1 (fr) 1995-07-18 1996-07-12 Soupape hydraulique pilotee de fermeture

Country Status (2)

Country Link
DE (1) DE19680592D2 (fr)
WO (1) WO1997004262A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19813038A1 (de) * 1998-03-25 1999-09-30 Volkswagen Ag Hydraulikkreis und Hydraulikventil
EP1138988A3 (fr) * 2000-03-27 2002-10-09 Smc Corporation Soupape à deux voies
US7069941B2 (en) 2001-12-04 2006-07-04 Arichell Technologies Inc. Electronic faucets for long-term operation
US7156363B2 (en) 2001-12-26 2007-01-02 Arichell Technologies, Inc. Bathroom flushers with novel sensors and controllers
EP1451415B1 (fr) * 2001-12-04 2007-08-29 Arichell Technologies, Inc. Chasse d'eau automatique
US7437778B2 (en) 2001-12-04 2008-10-21 Arichell Technologies Inc. Automatic bathroom flushers
US7704055B2 (en) 2004-06-04 2010-04-27 Hohmann Joerg Switching device for a hydraulic high-pressure system
US20110309274A1 (en) * 2002-06-24 2011-12-22 Parsons Natan E Electrically operated valve for delivering water

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1078604A (fr) * 1953-04-02 1954-11-19 Lecq Et Cie Soc Dispositif d'enclenchement et de déclenchement pneumatique
GB1452922A (en) * 1973-01-17 1976-10-20 Iv Pressure Controllers Ltd Valves
US4168720A (en) * 1976-03-03 1979-09-25 General Pneumatics Corporation Poppet valve
US4795129A (en) * 1985-01-29 1989-01-03 Clark Richard J Normally closed fluid switching logic element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1078604A (fr) * 1953-04-02 1954-11-19 Lecq Et Cie Soc Dispositif d'enclenchement et de déclenchement pneumatique
GB1452922A (en) * 1973-01-17 1976-10-20 Iv Pressure Controllers Ltd Valves
US4168720A (en) * 1976-03-03 1979-09-25 General Pneumatics Corporation Poppet valve
US4795129A (en) * 1985-01-29 1989-01-03 Clark Richard J Normally closed fluid switching logic element

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19813038A1 (de) * 1998-03-25 1999-09-30 Volkswagen Ag Hydraulikkreis und Hydraulikventil
DE19813038B4 (de) * 1998-03-25 2007-01-04 Volkswagen Ag Hydraulikkreis und Hydraulikventil
EP1138988A3 (fr) * 2000-03-27 2002-10-09 Smc Corporation Soupape à deux voies
US7069941B2 (en) 2001-12-04 2006-07-04 Arichell Technologies Inc. Electronic faucets for long-term operation
EP1451415B1 (fr) * 2001-12-04 2007-08-29 Arichell Technologies, Inc. Chasse d'eau automatique
US7437778B2 (en) 2001-12-04 2008-10-21 Arichell Technologies Inc. Automatic bathroom flushers
US7156363B2 (en) 2001-12-26 2007-01-02 Arichell Technologies, Inc. Bathroom flushers with novel sensors and controllers
US20110309274A1 (en) * 2002-06-24 2011-12-22 Parsons Natan E Electrically operated valve for delivering water
US9763393B2 (en) 2002-06-24 2017-09-19 Sloan Valve Company Automated water delivery systems with feedback control
US7704055B2 (en) 2004-06-04 2010-04-27 Hohmann Joerg Switching device for a hydraulic high-pressure system

Also Published As

Publication number Publication date
DE19680592D2 (de) 1997-11-27

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