EP0342409A2 - Soupape de sûreté - Google Patents

Soupape de sûreté Download PDF

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Publication number
EP0342409A2
EP0342409A2 EP89107712A EP89107712A EP0342409A2 EP 0342409 A2 EP0342409 A2 EP 0342409A2 EP 89107712 A EP89107712 A EP 89107712A EP 89107712 A EP89107712 A EP 89107712A EP 0342409 A2 EP0342409 A2 EP 0342409A2
Authority
EP
European Patent Office
Prior art keywords
valve
connection
control
channel
working
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.)
Withdrawn
Application number
EP89107712A
Other languages
German (de)
English (en)
Other versions
EP0342409A3 (fr
Inventor
Helmut Motzer
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.)
Herion Werke KG
Original Assignee
Herion Werke KG
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 Herion Werke KG filed Critical Herion Werke KG
Publication of EP0342409A2 publication Critical patent/EP0342409A2/fr
Publication of EP0342409A3 publication Critical patent/EP0342409A3/fr
Withdrawn legal-status Critical Current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
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/001—Double valve requiring the use of both hands simultaneously
    • 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
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87193—Pilot-actuated
    • Y10T137/87209—Electric
    • 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
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87217—Motor
    • Y10T137/87225—Fluid motor

Definitions

  • the invention relates to a hydraulically actuated safety valve, consisting of a valve housing with two valve bodies which can be actuated in opposite directions to one another in a bore in the housing, two e.g. Electromagnetically actuated pilot valves, a pump connection, two working connections and two tank connections, the valve bodies each having a working piston, which can be acted upon by the pressure medium via control channels and the pilot valves, and control pistons connected to the working piston, which have the connections between the pump connection, the working connections and control the tank connections, the pump connection being connected to the one working connection and the other working connection to one of the tank connections in the event of a malfunction.
  • Safety valves of the aforementioned type are e.g. used to control the brake and clutch of a mechanical press.
  • a valve consists of two directional control valves, so that if one valve fails, the braking process is still guaranteed.
  • the invention has for its object to develop a safety valve of the aforementioned type so that pressure build-up, speed and direction of movement can be controlled in a consumer downstream of the valve.
  • one of the two pilot valves is designed as a proportional pressure differential valve and the control pistons assigned to it are provided with fine control notches.
  • the pilot valve 14 is designed here as a proportional pressure difference valve.
  • a central bore 16 is formed in the housing 10, in which two valve bodies 18, 20 are arranged lying in one axis and can be moved axially in opposite directions to one another.
  • Each of the two valve bodies is equipped with a working piston 22 which has a blind bore in which a compression spring 24 is arranged.
  • a transverse bore 38 leads out of the blind bore into the space outside the respective working piston 22.
  • the valve body 18 is further provided with axially spaced control pistons 26, 28 and 30; valve body 20 is also equipped with axially spaced control pistons 32, 24 and 36.
  • the central bore 16 is provided with ring channels 108, 110, 112, 114, 115, 116, 117, 118, 120, 122, 124, 126, which are formed at axial intervals and lie in transverse planes to the longitudinal axis of the central bore 16.
  • the bore 16 also has one-sided pockets 104, 106, 128, 130.
  • the valve housing has a pump connection P, two working connections A and B and two tank connections R and S.
  • a channel 40 leads to the ring channel 115, from the working connection A leads Channel 42 to the ring channel 124, from the working connection B a channel 44 leads to the ring channel 120, from the tank connection R a channel 46 leads to the ring channel 108 and from the tank connection S a channel 48 leads to the ring channel 117.
  • a branch duct 50 branches off from duct 46 and thus from tank connection R to ring duct 126; and from the channel 40 and from the pump connection P, a branch channel 52 branches off to the left and right to the bore 16 opposite the pockets 106 and 128.
  • the ring channels 116 and 122 are connected to one another via a connecting channel 54; the ring channels 114 and 120 are connected via a connecting channel 56; the ring channels 112 and 118 are connected via a connecting channel 58 and finally the ring channels 110 and 124 are connected to one another via a connecting channel 60.
  • the pilot valve 12 has a piston 74 which is arranged to be axially movable in an axial bore of the valve. It is held by compression springs 80, which are arranged in spring chambers 78, in the basic position shown in FIG. 1, in which the magnet of the pilot valve 12 is not energized.
  • the two spring chambers 80 are continuously connected to one another by a connecting channel 82.
  • the central bore is provided with axially spaced ring channels 134, 136 and 138.
  • the pilot valve 14 is designed in the form of a proportional pressure difference valve. It has a piston 76 which is arranged to be axially movable in an axial bore and which is held in its basic position shown in FIG. 1 by compression springs 84, one of which is arranged in a spring chamber 86 and the other in a spring chamber 88, in which the proportional magnet 94 is not excited.
  • the central bore is provided with axially spaced ring channels 140, 142, 144, the spring chamber 86 being continuously connected to the ring channel 140 via a connecting channel 90 and the spring chamber 88 being permanently connected to the ring channel 142 via a connecting channel 92.
  • the valve is also provided with control channels 62, 64, 66 and 68, 70, 72, the control channel 62 connecting the pocket 104 to the ring channel 136 of the pilot valve 12; the control channel 64 connects the pocket 106 with the ring channel 140 of the proportional valve 14; the control channel 66 connects the ring channel 108 to the ring channel 134 of the pilot valve 12; the control channel 68 connects the pocket 130 with the ring channel 142 of the proportional valve 14; the control channel 70 connects the pocket 128 to the ring channel 138 of the pilot valve 12 and the control channel 72 connects the ring channel 126 to the ring channel 144 of the proportional valve 14.
  • control piston 34 is provided with fine control notches 96, 98 and the control piston 36 has fine control notches 100 and 102.
  • the safety valve according to the invention works as follows. 1, the magnets of the two pilot valves 12 and 14 are not energized. The two working pistons 22 are both acted upon by the pressure medium from the pump connection P, the left working piston 22 via the right branch duct 52, the control duct 70, the pilot valve 12 and the control duct 62; the right-hand working piston 22 via the left-hand branch channel 52, the control channel 64, the proportional valve 14 and the control channel 68.
  • the pressure medium flows via the control channels 62 and 68 to the respective transverse bore 38 and through this into the blind bores of the working piston and into the spring chambers 132 , whereby the two working pistons are loaded inwards.
  • the pump connection P is connected via the channel 40, the ring channels 115, 114 and the connecting channel 56 to the channel 44 and thus to the working connection B, while the working connection A via the channel 42, the connecting channel 60 and the ring channels 110, 108 is connected to the channel 46 and thus the tank connection R.
  • the two valve bodies 18, 20 are pressed axially away from each other against the force of the compression springs 24 until they abut the walls of the spring chambers 132 3 shows.
  • the pump connection P is connected to the working connection A via the ring channel 116, the connecting channel 54, and the ring channels 122, 124, while the working connection B is connected via the ring channel 120, the connecting channel 56, the ring channels 114, 112, the connecting channel 58 and the ring channels 118, 117 are connected to the tank connection S.
  • the spring chamber 132 of the left-hand working piston is under full pump pressure from P via the left branch channel 52, an annular groove in the outer circumference of the left-hand working piston and its transverse bore 38, through which the pressure medium can flow into the blind bore and into the spring chamber 132 .
  • the right-hand working piston 22, on the other hand, is connected via the control channel 68, the proportional valve 14 and the control channel 72 and the branch channel 50 to the tank connection R and is thus relieved of pressure.
  • the two valve bodies 18 and 20 therefore travel to the right up to the stop of the right working piston 22 on the end wall of the spring chamber 132. In this position, the pump connection P is working port B connected, while the working port A is connected to the tank port R.
  • the situation is exactly the opposite, ie the spring chamber 132 of the right piston 22 is under the pump pressure via the right branch channel 52, an annular groove on the outer circumference of the right working piston 22 and its transverse bore 38, through which the pressure medium in the blind bore of the right Working piston and flows into its spring chamber 132.
  • the left spring chamber 132 and thus the left working piston 22, on the other hand, is connected via its transverse bore 38, the control channel 62, the pilot valve 12 and the control channel 66 and the ring channel 108 to the channel 46 and thus to the tank connection R.
  • the two valve bodies 18 and 20 therefore drive to the left as far as it will go, as shown in Fig. 5.
  • the pump connection P is connected to the working connection B, while the working connection A is connected to the tank connection R and is thus relieved of pressure.
  • the valve therefore remains hydraulically locked in the event of every malfunction and can only be brought back to the basic position and then put into operation after the fault has been eliminated by relieving pressure at P.
  • Fig. 2 shows the control position of the valve.
  • the pilot valve 12 is in the switch position, while the proportional valve 14 is controlled so that its piston 76 is currently in the zero position, in which the connection from P to B has just been closed, while the connection from P to A has not yet been opened is.
  • the pressure in the right spring chamber 132 is hereby reduced, so that the valve body 20 is shifted somewhat to the right against the force of the compression spring of the right working piston 22 and against the pressure in the right spring chamber 132, since the full pump pressure prevails in the central bore 16 .
  • connection from P to A via the ring channels 115, 116, the connecting channel 54, the ring channel 122 and the fine control notches 100, via which the oil then reaches the ring channel 124 and from there to the working connection A.
  • connection from B to S is opened via the ring channel 120, the connecting channel 56, the ring channels 114, 112, the connecting channel 58, the ring channel 118 and the fine control notches 96 to the ring channel 117 and from there to the tank connection S. Accordingly, the connection of A to R and the connection from B to P closed.
  • the safety valve can thus be controlled proportionally, with which the pressure build-up, the speed and the direction of movement of the consumer downstream of the safety valve can be controlled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Driven Valves (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Safety Valves (AREA)
EP19890107712 1988-05-19 1989-04-27 Soupape de sûreté Withdrawn EP0342409A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3817123A DE3817123A1 (de) 1988-05-19 1988-05-19 Sicherheitsventil
DE3817123 1988-05-19

Publications (2)

Publication Number Publication Date
EP0342409A2 true EP0342409A2 (fr) 1989-11-23
EP0342409A3 EP0342409A3 (fr) 1990-10-17

Family

ID=6354733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890107712 Withdrawn EP0342409A3 (fr) 1988-05-19 1989-04-27 Soupape de sûreté

Country Status (4)

Country Link
US (1) US4903729A (fr)
EP (1) EP0342409A3 (fr)
JP (1) JPH0242290A (fr)
DE (1) DE3817123A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6478049B2 (en) 1996-12-16 2002-11-12 Ross Operating Valve Company Double valve with anti-tiedown capability
US6155293A (en) 1996-12-16 2000-12-05 Ross Operating Valve Company Double valve with anti-tiedown capability
US5927324A (en) * 1996-12-16 1999-07-27 Ross Operating Valve Company Cross flow with crossmirror and lock out capability valve
JP2003507664A (ja) 1999-08-13 2003-02-25 ヘリオン システムテクニク ゲゼルシャフト ミット ベシュレンクテル ハフツング プレス安全弁
DE60217753T2 (de) 2001-05-04 2007-11-15 Ross Operating Valve Co., Troy Steuerventilsystem
EP1275854A1 (fr) 2001-07-09 2003-01-15 Herion Systemtechnik GmbH Méthode et dispositif hydraulique de commande pour la protection contre les surcharges d'une presse mécanique actionnée par une combinaison embrayage-frein
DE10320524A1 (de) * 2003-04-30 2004-11-25 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Hydraulikkreis zur Steuerung eines Antriebsstranges
DE102009058371A1 (de) * 2009-12-15 2011-06-16 Hydac Filtertechnik Gmbh Ventilanordnung zur Ansteuerung eines Verbrauchers
DE102021005824B4 (de) 2021-11-24 2023-08-10 Hydac International Gmbh Sicherheitsventilvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269416A (en) * 1964-05-25 1966-08-30 American Brake Shoe Co Control valve mechanism with means for reducing hydraulic shock
DE1284231B (de) * 1965-01-15 1969-02-20 Herion Erich Steuereinrichtung mit zwei Steuerventilen
DE2717384A1 (de) * 1977-04-20 1978-10-26 Rexroth Gmbh G L Hydraulisch betaetigtes steuerventil
DE3205860A1 (de) * 1982-02-18 1983-08-25 Mannesmann Rexroth GmbH, 8770 Lohr Magnetbetaetigtes servoventil
DE3104957C2 (de) * 1981-02-12 1986-12-04 Herion-Werke Kg, 7012 Fellbach Hydraulisch betätigbares Pressensicherheitsventil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269416A (en) * 1964-05-25 1966-08-30 American Brake Shoe Co Control valve mechanism with means for reducing hydraulic shock
DE1284231B (de) * 1965-01-15 1969-02-20 Herion Erich Steuereinrichtung mit zwei Steuerventilen
DE2717384A1 (de) * 1977-04-20 1978-10-26 Rexroth Gmbh G L Hydraulisch betaetigtes steuerventil
DE3104957C2 (de) * 1981-02-12 1986-12-04 Herion-Werke Kg, 7012 Fellbach Hydraulisch betätigbares Pressensicherheitsventil
DE3205860A1 (de) * 1982-02-18 1983-08-25 Mannesmann Rexroth GmbH, 8770 Lohr Magnetbetaetigtes servoventil

Also Published As

Publication number Publication date
DE3817123A1 (de) 1989-11-30
US4903729A (en) 1990-02-27
JPH0242290A (ja) 1990-02-13
EP0342409A3 (fr) 1990-10-17

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