EP1220993B1 - Soupape de securite - Google Patents

Soupape de securite Download PDF

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Publication number
EP1220993B1
EP1220993B1 EP00974333A EP00974333A EP1220993B1 EP 1220993 B1 EP1220993 B1 EP 1220993B1 EP 00974333 A EP00974333 A EP 00974333A EP 00974333 A EP00974333 A EP 00974333A EP 1220993 B1 EP1220993 B1 EP 1220993B1
Authority
EP
European Patent Office
Prior art keywords
piston
pressure
valve
cylinder unit
restoring spring
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
EP00974333A
Other languages
German (de)
English (en)
Other versions
EP1220993A2 (fr
Inventor
Stefan Pfund
Günter Baldauf
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.)
Norgren GmbH
Original Assignee
IMI Norgren Herion Fluidtronic GmbH and Co 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 IMI Norgren Herion Fluidtronic GmbH and Co KG filed Critical IMI Norgren Herion Fluidtronic GmbH and Co KG
Publication of EP1220993A2 publication Critical patent/EP1220993A2/fr
Application granted granted Critical
Publication of EP1220993B1 publication Critical patent/EP1220993B1/fr
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
    • 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

Definitions

  • the invention relates to a safety valve for compressed air operated Consumers according to the preamble of the claim 1.
  • Such a safety valve goes out, for example DE 30 05 547 C2 and DE 196 22 198 A1.
  • Such safety valves are used, for example Actuating clutches and brakes of presses used.
  • the inlet is blocked in such safety valves and vented the line leading to the consumer, so that there is no residual pressure in the latter is.
  • the control air for the pilot valves is not to be taken directly from the inflow, but from cross channels, the the two holes in which the valve disc is guided are cross-connected. hereby is a permanent dynamic self-monitoring of the safety valve reachable.
  • the object of the invention is to provide a safety valve Generic type in such a way that a Reset or restart the valve after removal the disorder in a simple manner, preferably without the aid of electrical switching elements, is possible.
  • each Switching element a device for dynamic Monitoring pressure differences in at least two Pressure lines with a piston-cylinder unit, the at different pressures in the two pressure lines the input of one of the two directional valves connects the atmosphere.
  • the entrance one of the two directional control valves By connecting the entrance one of the two directional control valves with the atmosphere an unintentional and unwanted restart of the safety valve avoided.
  • the switching element is preferably in one of the Pre-control channels arranged.
  • a safety valve 10, shown in Fig. 1 to Fig. 5, includes a housing 12 in which two directional control valves are arranged in parallel. Each of the two directional valves has a working piston 16a and 16b and a valve disk firmly connected to this 18a, 18b.
  • the housing 12 has an inlet connection 20 for compressed air, a return port 22 and one Consumer connection 24.
  • Each of the directional control valves is a electromagnetically switchable pilot valve 26a or 26b assigned with valve seats 28a and 28b and ventilation openings 30a or 30b.
  • the piston-shaped valve disc 18a, 18b are in bores 36a, 36b of the housing 12 out. As a result, valve seats 34a, 34b opened and closed. Through the working pistons 16a, 16b, valve seats 32a, 32b are opened and closed.
  • the two valve plates 18a, 18b have cross bores 38 on, which open into an annular channel 42a and 42b.
  • cross channels 46a, 46b In the housing 12 there are also two channels 46a, 46b, hereinafter referred to as cross channels, through which the two bores 36a, 36b mutually are interconnectable. From these cross channels 46a, 46b branch pilot channels 48a, 48b, which via Storage chambers 60a, 60b and below in more detail descriptive dynamic monitoring devices of pressure differences, hereinafter briefly storage valves 70a, 70b, to the valve seats 28a, 28b of the pilot valves 26a, 26b. From the pilot valves channels 50a and 50b also lead to the working pistons 16a, 16b or to their working chambers 14a, 14b.
  • the storage valves 70a, 70b are switched so that the one way valve 26a or one of the two in parallel switched directional control valve associated storage valve 70a has a first input line 71a which on the one hand with an electromagnetically actuated one Valve 72a and on the other hand with the inlet line 73b of the other storage valve 70b is connected, and one second input line 73a connected to the storage chamber 60b is connected.
  • the one assigned to the other directional valve Storage valve 70b has an input line 71b on the one hand with an electromagnetically actuated Valve 72b and on the other hand with the second Input line 73a of the other storage valve 70a is connected, whereas its second input line 73b with the first input line 71a of the storage valve 70a is connected.
  • the storage valves 70a, 70b are thus also via the storage chambers 60a, 60b crosswise over the channels 48a and 48b with the parallel arranged directional valves connected.
  • the storage valve for dynamic monitoring and Storage of pressure differences shown in Fig. 6 and Fig. 7 includes a housing 200 with a connector 207, which with the second input lines 73a and 73b is connected and a terminal 211 which is connected to the first Input lines 71a and 71b is connected.
  • a piston 202 against the restoring force of return springs 205 movable In the housing 200 is in an opening of the housing 200 a piston 202 against the restoring force of return springs 205 movable.
  • the storage valve further includes a port 208 and port 210, port 208 depending on the position of the piston 202 either with the port 207 or with the connection 210, which in turn with the Atmosphere is connected, is connectable.
  • the connection 208 is in the safety valve shown in FIGS. 1 to 5 connected to the pilot valves 26a, 26b, whereas port 210 with the return line 22 or the atmosphere.
  • the piston 202 is on its return springs 205 side facing away from a membrane 201, which is fixed in the housing 200 and an effective one Pressure area A1 forms with which the piston 201 with a Pressure prevailing at port 211 can be applied is.
  • the effective printing area is shown on this page larger pressure area formed by a seat 209 A2 of cob 202 formed.
  • the Printing area but also by a piston with a Sealing element, for example a lip ring can be trained.
  • the spring force generated by the return springs 205 holds piston 202 in its illustrated in FIG. 6 Rest.
  • the piston 202 has its sealing surfaces facing away from the return springs 205 203, which cooperate with the valve seat 209.
  • the piston 202 On its side facing the return springs 205 the piston 202 also has a sealing surface 204, which cooperates with a valve seat 206.
  • the storage valve always stores a signal if there is pressure at port 211 and port at the same time 207 there is no pressure or if there is one Pressure difference is present, as described in more detail below becomes.
  • the memory function of the memory valve is as follows.
  • the fluid pressure drops at port 207 and thus at the port 208 from - with a pressure difference due to the interaction the area A1, A2 and the spring force of the Springs 205 can be determined during a store operation should be initiated - so remains (only still) the spring force and the resulting force the lower pressure compared to port 211 the ports 207, 208 to the piston 202 in its To hold at rest.
  • the membrane 201 pressure applied the spring force and the resulting Force from the lower pressure compared to the connection 211 predominates at the connections 207, 208 because port 211 continues to be pressurized the piston 202 moves into the position shown in FIG. 7 storage position shown down in the direction of valve seat 206 with area A3.
  • connection 207 and 208 If there is now a fluid pressure at connection 207 and 208 again is present or the pressure rises again, then only arises a slight upward force that formed becomes the product "Seat A3 of the valve seat 206 times fluid pressure ".
  • the seat A3 of the valve seat 206 is dimensioned so that this force together with the force generated by the return springs 205 is not sufficient, the piston 202 against the down directed force that is formed by the product "Fluid pressure times membrane area A1" to move.
  • On Pressure equalization between port 207 and 211 leads not to reset or delete the memory function the device to the rest position. The one that occurred The difference in pressure remains to a certain extent due to the position of the piston connecting port 208 through the port 210 connects with the atmosphere, saved.
  • Resetting the storage valve i.e. a delete function can only be achieved in that the space vented through the diaphragm 201 through the connection 211 is so that the springs 205 and the on the seat A3 pending fluid pressure the piston 202 back into its Move the home or rest position upwards. In this If the stored signal is deleted.
  • the Venting can be performed as shown below in connection with Fig. 1 to 5 described, via the electromagnetically actuated Reset valves 72a and 72b take place.
  • the safety valve works as follows.
  • Fig. 1 the safety valve is in the rest position shown.
  • the pilot valves are at rest 26a, 26b closed and the working chambers 14a, 14b the working piston 16a, 16b via the channels 50a, 50b and the vent openings 30a, 30b of the pilot valves Vented 26a, 26b.
  • the valve plates 18a, 18b thus by the compression springs 80a and 80b (and the pressure medium) pressed against the seats 34a, 34b and close this.
  • the valve seats 32a and 32b of the working piston are open so that the consumer connection 24 to Return port 22 is vented.
  • Will the pilot valves 26a, 26b are now switched, as in Fig. 2 shown, their valve seats 28a, 28b opened and its vent 30a, 30b closed.
  • the Volume of the pilot channels 48a, 48b of the storage chambers 60a, 60b and the second connecting lines 73a, 73b and the connecting lines 75a, 75b of the storage valves 70a, 70b is chosen so large that the in the Pilot channels 48a, 48b and the storage chambers 60a, 60b and the second connecting lines 73a, 73b as well the compressed air located at the connecting lines 75a, 75b, via the valve seats 28a, 28b and the channels 50a, 50b into the working chambers 14a and 14b of the working pistons 16a, 16b flows in, sufficient to the working piston 16a, 16b to switch so that they are the same as in FIG Take the position shown, in which the valve seats 32a, 32b of the working piston closed and the valve seats 34a, 34b of the valve plates 18a, 18b are open.
  • the compressed air flows from the inlet 20 in the hollow drilled valve plates 18a, 18b, from there through the transverse bores 38 into the ring channels 42a, 42b, then through the cross channels 46a, 46b into the ring channels 40a, 40b and from these through the valve seats 34a, 34b through through the consumer connection 24 to the consumer.
  • the compressed air flows out of the Cross channels 46a, 46b or from the ring channels 40a, 40b into the pilot channels 48a, 48b, into the storage chambers 60a, 60b and towards the storage valves 70a, 70b, where both the input line 71a and 71b as also the input line 73a or 73b of the storage valves 70a or 70b with compressed air at the same pressure are acted upon.
  • the storage valves 70a, 70b are in this state in the rest position described above, so that the valve seats 28a and 28b filled with compressed air that are under the full inlet pressure in order to the working pistons 16a, 16b of those arranged in parallel Valves via lines 50a, 50b in the switching position to keep.
  • pilot valves 26a, 26b again switched and their valve seats 28a, 28b closed, so are the vents at the same time 30a, 30b opened and the working chambers 14a, 14b of the working pistons 16a, 16b via the ventilation openings 30a, 30b of the pilot valves and the channels 50a and 50b vented.
  • the two directional valves are then returned to the in Fig. 1 switched to the rest position, since the Working pistons 16a, 16b are no longer subjected to the compressed air and therefore the springs 80a, 80b are the valve plates Press 18a, 18b onto their valve seats 34a, 34b.
  • the pilot channels 48a and 48b are, however filled with compressed air that has the full inlet pressure, so that when switching again through this Compressed air the working pistons 16a, 16b back into position 2 can be switched.
  • valve plate 18a Compressed air enters through the valve plate 18a via the transverse bore 38 and the ring channel 42a in the Cross channel 46b, since the valve plate 18b in closed position, it cannot flow there. Via the in connection with the cross channel 46b However, the pilot piston 48b remains the working piston 16a with the full inflow.
  • the pilot channel 48a is via the ring channel 40a and the open valve seats 34a and 32b for return 22 vented so that in the pilot channel 48a no pressure can build up and any existing pressure to the return pressure, e.g. Atmospheric pressure, reduced becomes.
  • the storage valve 70a in its rest position, in which line 73a via line 75a connected to the valve seat 28a of the solenoid valve 26a is so that the valve seat 28a via the pilot line 48b and the storage chamber 60b with under pressure standing fluid is applied.
  • the storage valve 70b has changed to its storage position, since the two lines 71b and 73b are not the same There is pressure.
  • Resetting the device is also possible by switching off of the system pressure possible.
  • This can e.g. the solenoid valve or the mechanically operated one Valve, for example using a key switch is pressed, omitted.

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  • 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-Pressure Circuits (AREA)
  • Multiple-Way Valves (AREA)
  • Safety Valves (AREA)
  • Fluid-Driven Valves (AREA)

Claims (8)

  1. Soupape de sécurité pour consommateurs pneumatiques avec deux distributeurs montés en parallèle, présentant chacun un piston moteur (16a, 16b) et une tête de soupape reliée à ce piston moteur, chacun de ces deux distributeurs pouvant être commuté par une soupape pilote (26a, 26b) lui étant associée, les deux têtes de soupape étant amenées à chaque fois dans un alésage de la cage de soupape et ces deux alésages étant reliés l'un à l'autre en croix à l'aide de deux canaux transversaux (46a, 46b), et le siège de soupape (28a) du premier canal pilote (26a) étant relié via un canal pilote (48b) à l'un des canaux transversaux (46b) qui part de l'alésage (36b) de l'une des têtes de soupape (18b), et le siège de soupape (28b) de la deuxième soupape pilote (26b) étant relié via un autre canal pilote (48a) à l'autre canal transversal (46a) qui part de l'alésage (36a) de l'autre tête de soupape (18a),
    caractérisée en ce que
    sur deux points associés l'un à l'autre de chacun des deux distributeurs un élément de circuit pneumatique est à chaque fois prévu qui permet de verrouiller la soupape de sécurité en cas de différences de pression sur ces deux points et de ne la réactiver que grâce à l'actionnement pneumatique externe d'au moins un des deux éléments de circuit.
  2. Soupape de sécurité selon la revendication 1,
    caractérisée en ce qu'
    un élément de circuit est à chaque fois disposé dans chaque canal pilote, les deux points étant des entrées des éléments de circuit qui sont à chaque fois reliées en croix avec les entrées correspondantes de l'autre élément de circuit.
  3. Soupape de sécurité selon la revendication 2,
    caractérisée en ce que
    chaque élément de circuit est un dispositif pour le contrôle dynamique de la différence de pression dans au moins deux conduites de pression avec une unité piston-cylindre qui relient à l'atmosphère l'un des deux distributeurs en cas de différences de pression dans les deux conduites de pression.
  4. Soupape de sécurité selon la revendication 3,
    caractérisée en ce que
    le dispositif pour le contrôle dynamique des différences de pression dans les deux conduites de pression au moins comprend une unité piston-cylindre avec deux surfaces de pression (A1, A2) efficaces, opposées l'une à l'autre et de dimensions différentes dont l'une peut être alimentée par un fluide sous pression via une conduite de pression et dont l'autre l'est via l'autre conduite de pression et avec un piston (202), qui est déplaçable à l'encontre de la force de rappel d'au moins un ressort de rappel (205) de sorte qu'à pression égale dans les deux conduites de pression la force de rappel d'au moins un ressort de rappel (205) associée à la force de pression agissant sur la surface de pression (A2) tournée vers au moins un ressort de pression (205) est aussi importante que la force de pression agissant sur la surface de pression (A1) détournée du ressort de pression (205), de sorte que l'unité piston-cylindre demeure ferme dans sa position neutre, et en cas de diminution, même courte, de la force de pression agissant sur la face tournée vers au moins un ressort de rappel (205), l'unité piston-cylindre passe dans une position de stockage dans laquelle la force de pression agissant sur la surface de pression (A1) non tournée vers au moins un ressort de rappel (205) est supérieure à la somme de l'élasticité et de la force de pression agissant sur une troisième surface d'entrée (A3) en cas de réalimentation avec du fluide sous pression, alors que l'unité piston-cylindre ne peut revenir de la position de stockage à la position neutre qu'en supprimant la pression agissant sur la surface de pression (A1) non tournée vers le ressort de rappel (205).
  5. Soupape de sécurité selon la revendication 4,
    caractérisée en ce que
    la surface de pression disposée sur la face non tournée vers au moins un ressort de rappel (205) est formée par une membrane d'actionnement (201) de l'unité piston-cylindre.
  6. Soupape de sécurité selon la revendication 4,
    caractérisée en ce que
    la surface de pression (A1) disposée sur la face non tournée vers au moins un ressort de rappel (205) est formée par un élément d'étanchéité, de préférence un joint à lèvre, d'un piston de l'unité piston-cylindre.
  7. Soupape de sécurité selon l'une quelconque des revendications 4 à 6,
    caractérisée en ce que
    l'unité piston-cylindre présente au moins deux raccords (208, 210) dont l'un est relié à l'atmosphère et dont l'autre est relié au raccord (207) tourné vers au moins un ressort de rappel (205) en position de repos de l'unité piston-clindre, et au raccord (210) relié à l'atmosphère dans la position de stockage de l'unité piston-cylindre.
  8. Soupape de sécurité selon l'une quelconque des revendications 4 à 6,
    caractérisée en ce que
    la force de pression agissant sur la surface de pression (A1) non tournée vers au moins un ressort de rappel (205) peut être diminuée par une électrovanne ou par une soupape pouvant être actionnée mécaniquement ou encore par la suppression de la pression du système.
EP00974333A 1999-10-15 2000-09-28 Soupape de securite Expired - Lifetime EP1220993B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19949874 1999-10-15
DE19949874A DE19949874B4 (de) 1999-10-15 1999-10-15 Sicherheitsventil
PCT/DE2000/003376 WO2001029429A2 (fr) 1999-10-15 2000-09-28 Soupape de securite

Publications (2)

Publication Number Publication Date
EP1220993A2 EP1220993A2 (fr) 2002-07-10
EP1220993B1 true EP1220993B1 (fr) 2004-08-04

Family

ID=7925843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00974333A Expired - Lifetime EP1220993B1 (fr) 1999-10-15 2000-09-28 Soupape de securite

Country Status (6)

Country Link
US (1) US6758241B1 (fr)
EP (1) EP1220993B1 (fr)
JP (1) JP4643100B2 (fr)
DE (2) DE19949874B4 (fr)
ES (1) ES2223604T3 (fr)
WO (1) WO2001029429A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011018152A1 (fr) 2009-08-11 2011-02-17 Festo Ag & Co. Kg Ensemble soupape de sécurité pneumatique

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2278832T3 (es) * 2001-05-04 2007-08-16 Ross Operating Valve Company Sistema de control de valvulas.
US20030084219A1 (en) * 2001-10-26 2003-05-01 Maxxan Systems, Inc. System, apparatus and method for address forwarding for a computer network
US7145914B2 (en) * 2001-12-31 2006-12-05 Maxxan Systems, Incorporated System and method for controlling data paths of a network processor subsystem
US7307995B1 (en) 2002-04-05 2007-12-11 Ciphermax, Inc. System and method for linking a plurality of network switches
US7379970B1 (en) 2002-04-05 2008-05-27 Ciphermax, Inc. Method and system for reduced distributed event handling in a network environment
US7406038B1 (en) 2002-04-05 2008-07-29 Ciphermax, Incorporated System and method for expansion of computer network switching system without disruption thereof
US7295561B1 (en) 2002-04-05 2007-11-13 Ciphermax, Inc. Fibre channel implementation using network processors
US20030195956A1 (en) * 2002-04-15 2003-10-16 Maxxan Systems, Inc. System and method for allocating unique zone membership
US20030200330A1 (en) * 2002-04-22 2003-10-23 Maxxan Systems, Inc. System and method for load-sharing computer network switch
US20040030766A1 (en) * 2002-08-12 2004-02-12 Michael Witkowski Method and apparatus for switch fabric configuration
DE102013013312A1 (de) * 2013-08-12 2015-02-12 Heye International Gmbh Ventilbaugruppe für eine I.S.-Maschine

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Publication number Priority date Publication date Assignee Title
DE2121528C3 (de) 1971-05-03 1983-05-05 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Pneumatische Zweihand-Einrücksteuerung für einen Druckluftverbraucher
DE3005547C2 (de) 1980-02-14 1985-05-02 Technomatic AG, Aesch, Luzern Sicherheitsventil
FR2643174B1 (fr) * 1989-02-13 1994-06-17 Quiet Sa Dispositif de securite a rearmement pour la commande du declenchement d'au moins une mesure de securite sur une installation comportant au moins une alimentation pneumatique, en cas de chute de pression de cette alimentation
DE9014789U1 (de) * 1990-10-25 1991-02-07 Herion-Werke Kg, 7012 Fellbach Sicherheitsventil
US5113907A (en) 1991-01-29 1992-05-19 Ross Operating Valve Company Dynamic self-monitoring air operating system
DE19622198A1 (de) * 1996-06-03 1997-12-04 Herion Technomatic Ag Aesch Vorrichtung zur dynamischen Überwachung von Ventilen
US5927324A (en) * 1996-12-16 1999-07-27 Ross Operating Valve Company Cross flow with crossmirror and lock out capability valve
US5850852A (en) * 1996-12-16 1998-12-22 Ross Operating Valve Company Crossflow with crossmirror and lock out capability valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011018152A1 (fr) 2009-08-11 2011-02-17 Festo Ag & Co. Kg Ensemble soupape de sécurité pneumatique
DE102009037120A1 (de) 2009-08-11 2011-02-17 Festo Ag & Co. Kg Pneumatische Sicherheitsventileinrichtung
DE102009037120B4 (de) * 2009-08-11 2012-12-06 Festo Ag & Co. Kg Pneumatische Sicherheitsventileinrichtung

Also Published As

Publication number Publication date
WO2001029429A2 (fr) 2001-04-26
DE19949874B4 (de) 2004-09-23
JP4643100B2 (ja) 2011-03-02
JP2003512579A (ja) 2003-04-02
WO2001029429A3 (fr) 2001-06-14
ES2223604T3 (es) 2005-03-01
DE50007312D1 (de) 2004-09-09
DE19949874A1 (de) 2001-04-26
EP1220993A2 (fr) 2002-07-10
US6758241B1 (en) 2004-07-06

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