EP0330575A1 - Hydraulischer Kreislauf mit zugehörigem Sicherheitsventil für hydraulische Verbraucher - Google Patents

Hydraulischer Kreislauf mit zugehörigem Sicherheitsventil für hydraulische Verbraucher Download PDF

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Publication number
EP0330575A1
EP0330575A1 EP89400508A EP89400508A EP0330575A1 EP 0330575 A1 EP0330575 A1 EP 0330575A1 EP 89400508 A EP89400508 A EP 89400508A EP 89400508 A EP89400508 A EP 89400508A EP 0330575 A1 EP0330575 A1 EP 0330575A1
Authority
EP
European Patent Office
Prior art keywords
valve
orifice
pressure
controlled
outlet
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.)
Granted
Application number
EP89400508A
Other languages
English (en)
French (fr)
Other versions
EP0330575B1 (de
Inventor
Maurice Tardy
Louis Marcon
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.)
Marrel SA
Original Assignee
Marrel SA
Bennes Marrel SA
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 Marrel SA, Bennes Marrel SA filed Critical Marrel SA
Priority to AT89400508T priority Critical patent/ATE88548T1/de
Publication of EP0330575A1 publication Critical patent/EP0330575A1/de
Application granted granted Critical
Publication of EP0330575B1 publication Critical patent/EP0330575B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • F15B13/015—Locking-valves or other detent i.e. load-holding devices using an enclosed pilot flow valve
    • 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
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87499—Fluid actuated or retarded
    • 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
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87555—Having direct response valve [e.g., check valve, etc.]
    • Y10T137/87563—With reverse flow direction

Definitions

  • the present invention aims to solve this problem by ensuring the safety of users, even in the event of a broken pipe in a circuit controlling the handling of a load.
  • load handling it aims in particular to allow the load to be immobilized during the lifting phase and, during the descent phase, the normal continuation of its movement and / or its stopping on order.
  • the invention also relates to a hydraulic circuit comprising such a valve fixed to this receiver and the distributor of which can be controlled by the overpressure from the pilot orifice.
  • At least one of the pipes 2 and 3, here the pipe 2, is fitted with a safety valve 15 which protects the corresponding jack chamber (1A).
  • This second valve is distinguished from the first by the presence of a leakage drain 50 communicating a backpressure chamber associated with the controlled valve 17 with a leakage orifice Y.
  • a non-return valve with adjustable threshold 51 is advantageously provided on this drain. By adjusting this threshold, the counter-pressure opposite to the pilot pressure is acted on to control the controlled valve. This facilitates coordinated control of several safety valves.
  • the control chamber of the valve 17 is controlled by an element 52 adapted to be exclusively traversed by a pilot fluid coming from the valve 18 or from the orifice Z.
  • FIGS. 2 to 4 illustrate an embodiment of the safety valve 15.
  • the piston rod is slidably mounted in a cap 41 in which it defines a balancing chamber with variable volume 42 placed in communication with the chamber 27 of the sleeve by a balancing duct 43 formed longitudinally in the stem.
  • the elements 26, 28, 32, 38 and 39 generally constitute the controlled valve 17 of FIG. 1, except that the non-return valve 26 is here independent of the controlled drawer. In a variant not shown, this valve 26 and the section of conduit which contains it can be omitted if the orifices 28B or 28B ′ normally open out between the bearing surfaces 30 and 31.
  • the nozzle 22A corresponds to that marked 19 in FIG. 1.
  • This device makes it possible, when an earthmoving machine is used to handle loads, to ensure the safety of people and equipment.
  • the shape and distribution of the orifices 28B and 28B ' can easily be optimized to obtain better progressiveness.
EP89400508A 1988-02-25 1989-02-23 Hydraulischer Kreislauf mit zugehörigem Sicherheitsventil für hydraulische Verbraucher Expired - Lifetime EP0330575B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89400508T ATE88548T1 (de) 1988-02-25 1989-02-23 Hydraulischer kreislauf mit zugehoerigem sicherheitsventil fuer hydraulische verbraucher.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8802289A FR2627838B1 (fr) 1988-02-25 1988-02-25 Valve de securite pour recepteur hydraulique et circuit hydraulique la comportant
FR8802289 1988-02-25

Publications (2)

Publication Number Publication Date
EP0330575A1 true EP0330575A1 (de) 1989-08-30
EP0330575B1 EP0330575B1 (de) 1993-04-21

Family

ID=9363611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400508A Expired - Lifetime EP0330575B1 (de) 1988-02-25 1989-02-23 Hydraulischer Kreislauf mit zugehörigem Sicherheitsventil für hydraulische Verbraucher

Country Status (6)

Country Link
US (1) US4936032A (de)
EP (1) EP0330575B1 (de)
JP (1) JPH0231085A (de)
AT (1) ATE88548T1 (de)
DE (1) DE68906056T2 (de)
FR (1) FR2627838B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0463920A1 (de) * 1990-06-22 1992-01-02 Kabushiki Kaisha Kosmek Schaltung zur Druckölspeisung und -entladung und Ventilvorrichtung zur Durchführung der genannten Schaltung
EP0466582A1 (de) * 1990-07-13 1992-01-15 Kabushiki Kaisha Kosmek Hydraulische Schaltung zum Heben und Senken und Ventilblock für diese Schaltung
EP0756089A3 (de) * 1993-04-05 1998-03-25 Deere & Company Hydrauliksteuersystem

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5203668A (en) * 1991-06-06 1993-04-20 E. Fisher Apparatus for loading and unloading of a container structure or other loads with respect to a truck body or trailer
AT396613B (de) * 1992-05-15 1993-10-25 Hoerbiger Fluidtechnik Gmbh Hydraulische betätigungsanordnung für ein fahrzeugverdeck
DE4231189A1 (de) * 1992-09-17 1994-03-24 Rexroth Mannesmann Gmbh Sicherheitsschaltung für ein servohydraulisches Regelsystem
DE4312644C2 (de) * 1993-04-19 1996-01-25 Rexroth Mannesmann Gmbh Steuerung für einen hydraulischen Verbraucher
DE4406669C2 (de) * 1994-03-01 1997-01-30 Rexroth Mannesmann Gmbh Servohydraulisches Regelsystem
DE19804398A1 (de) * 1998-02-04 1999-08-05 Linde Ag Ventilanordnung für die Arbeitshydraulik eines Arbeitsfahrzeugs
DE10254605B4 (de) * 2002-11-22 2012-08-09 Linde Material Handling Gmbh Steuerventileinrichtung
DE10336684A1 (de) * 2003-08-09 2005-03-03 Deere & Company, Moline Hydraulische Steueranordnung für eine mobile Arbeitsmaschine
KR100956999B1 (ko) * 2007-12-10 2010-05-11 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 외부 파일럿 작동형 홀딩밸브를 갖는 유압회로
US20110308004A1 (en) * 2010-12-16 2011-12-22 Hamidreza Khorsandraftar Security system for artificial water bodies
CN102588366B (zh) * 2011-01-13 2015-09-16 斗山工程机械（中国）有限公司 一种工程机械及其前部工作装置的锁定阀
DE102011014685A1 (de) * 2011-03-22 2012-09-27 Linde Material Handling Gmbh Hydraulische Steuerventileinrichtung
CN103423226B (zh) * 2013-08-21 2016-02-24 常德中联重科液压有限公司 换向阀组件及包括该换向阀组件的液压系统
US20140165281A1 (en) * 2014-02-19 2014-06-19 Hamidreza Khorsandraftar Security system for artificial water bodies
AU2017441860B2 (en) * 2017-12-07 2023-11-02 Maxell Izumi Co., Ltd. Electric tool
IT201800007591A1 (it) 2018-07-27 2020-01-27 Atlantic Fluid Tech Srl Dispositivo per Controllare un Attuatore

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244275A (en) * 1979-01-15 1981-01-13 Abex Corporation Counterbalance valve
US4655039A (en) * 1985-06-20 1987-04-07 The Raymond Corporation Lift system

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ENERGIE FLUIDE, no. 85, mars 1976, pages 59-61, Paris, FR; "Valves de sécurité pour engins de travaux publics" *
ENERGIE FLUIDE, no. hors série, spécial "matériels", septembre 1980, page 61, Paris, FR; FRANK et al.: "Clapets d'equilibrage" *
ENERGIE FLUIDE, vol. 21, no. 4, mai 1982, pages 48-53, Paris, FR; M.R. JACOB: "L'évolution des dispositifs de sécurité sur vérins" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0463920A1 (de) * 1990-06-22 1992-01-02 Kabushiki Kaisha Kosmek Schaltung zur Druckölspeisung und -entladung und Ventilvorrichtung zur Durchführung der genannten Schaltung
EP0466582A1 (de) * 1990-07-13 1992-01-15 Kabushiki Kaisha Kosmek Hydraulische Schaltung zum Heben und Senken und Ventilblock für diese Schaltung
EP0756089A3 (de) * 1993-04-05 1998-03-25 Deere & Company Hydrauliksteuersystem

Also Published As

Publication number Publication date
EP0330575B1 (de) 1993-04-21
JPH0231085A (ja) 1990-02-01
FR2627838A1 (fr) 1989-09-01
US4936032A (en) 1990-06-26
DE68906056D1 (de) 1993-05-27
FR2627838B1 (fr) 1991-01-11
ATE88548T1 (de) 1993-05-15
DE68906056T2 (de) 1994-01-20

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