EP0684392A1 - Safety valve - Google Patents

Safety valve Download PDF

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Publication number
EP0684392A1
EP0684392A1 EP95105548A EP95105548A EP0684392A1 EP 0684392 A1 EP0684392 A1 EP 0684392A1 EP 95105548 A EP95105548 A EP 95105548A EP 95105548 A EP95105548 A EP 95105548A EP 0684392 A1 EP0684392 A1 EP 0684392A1
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EP
European Patent Office
Prior art keywords
valve
connection
valves
base plate
safety valve
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
EP95105548A
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German (de)
French (fr)
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EP0684392B1 (en
Inventor
Erich Herion
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
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Herion Werke KG
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Publication of EP0684392A1 publication Critical patent/EP0684392A1/en
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Publication of EP0684392B1 publication Critical patent/EP0684392B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0807—Manifolds
    • F15B13/0814—Monoblock manifolds
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0871—Channels for fluid
    • 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

Definitions

  • An inlet connection, a working connection and an exhaust air connection, the connecting channels from these connections to the two directional control valves and the connecting channels between the two directional control valves are preferably formed in the common base plate.
  • an air accumulator connected to the inlet connection for each directional control valve and a throttle point between the inlet connection and each of the two air accumulators are also formed in the common base plate.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Multiple-Way Valves (AREA)

Abstract

The common housing is assembled on a single base plate (34) and has shaped chambers to house the parallel valve elements (20). The base plate has an air inlet hole (22) , an air outlet hole (24) and a vent hole (26). The connection between the valve is a cross-connection. The valve only applies working pressure when both valve elements are correctly positioned. The air inlet is linked to pneumatic storage chambers (30) for each valve side via separate flow restrictions (28) to provide a buffer action. The connecting channels (44,46) are incorporated in the middle of the valve.

Description

Die Neuerung betrifft ein Sicherheitsventil für druckluftbetriebene Verbraucher, bestehend aus zwei über Kreuz miteinander gekoppelten Wegeventilen.The innovation relates to a safety valve for compressed air-powered consumers, consisting of two directional valves that are cross-coupled.

Es sind Sicherheitsventile bekannt, bei denen durch geeignete Serien- und Parallelschaltungen von 2/2-Ventilen und 3/2-Ventilen erreicht wird, daß am Verbraucheranschluß nur dann Druck ansteht, wenn zwei Ventilspindeln sich in gleichen Schaltpositionen befinden. Dies wird dadurch erreicht, daß die Luftzuführungen der beiden Einzelventile in Serie und über Kreuz geschaltet sind, während die Entlüftungskanäle parallel liegen, wodurch bei Nichtfunktion eines Ventils der Arbeitsanschluß entlüftet ist. Im Arbeitsanschluß und damit am Verbraucher kann sich daher kein Druck aufbauen.Safety valves are known in which suitable series and parallel connections of 2/2 valves and 3/2 valves ensure that pressure is only present at the consumer connection when two valve spindles are in the same switching positions. This is achieved in that the air inlets of the two individual valves are connected in series and crosswise, while the ventilation channels are parallel, which means that the working connection is vented when a valve is not functioning. No pressure can therefore build up in the work connection and thus on the consumer.

Diese bekannten Sicherheitsventile sind bisher als Eingehäuse-Konstruktionen gebaut worden, was zu hohen Fertigungskosten führt.These known safety valves have so far been built as single-housing constructions, which leads to high manufacturing costs.

Der Neuerung liegt daher die Aufgabe zugrunde, ein Sicherheitsventil der eingangs genannten Art so weiterzubilden, daS sein Aufbau vereinfacht und seine Herstellungskosten gesenkt werden könnnen.The innovation is therefore based on the object of developing a safety valve of the type mentioned at the outset such that its structure can be simplified and its production costs can be reduced.

Nach der Neuerung wird dies dadurch erreicht, daß die beiden Wegeventile auf einer gemeinsamen Grundplatte angeordnet sind.According to the innovation, this is achieved in that the two directional valves are arranged on a common base plate.

Vorzugsweise sind in der gemeinsamen Grundplatte ein Zulaufanschluß, ein Arbeitsanschluß und ein Abluftanschluß, die Verbindungskanäle von diesen Anschlüssen zu den beiden Wegeventilen und die Verbindungskanäle zwischen den beiden Wegeventilen ausgebildet.An inlet connection, a working connection and an exhaust air connection, the connecting channels from these connections to the two directional control valves and the connecting channels between the two directional control valves are preferably formed in the common base plate.

Vorteilhafterweise sind ferner in der gemeinsamen Grundplatte je ein an den Zulaufanschluß angeschlossener Luftspeicher für jedes Wegeventil sowie je eine Drosselstelle zwischen dem Zulaufanschluß und jedem der beiden Luftspeicher ausgebildet.Advantageously, an air accumulator connected to the inlet connection for each directional control valve and a throttle point between the inlet connection and each of the two air accumulators are also formed in the common base plate.

Schließlich besteht vorzugsweise jedes der beiden Wegeventile aus einem 2/2-Ventil und einem 3/2-Ventil, die über einen gemeinsamen Ventilkolben miteinander gekoppelt sind.Finally, each of the two directional control valves preferably consists of a 2/2 valve and a 3/2 valve, which are coupled to one another via a common valve piston.

Eine beispielsweise Ausführungsform der Neuerung wird nachstehend anhand der Zeichnung erläutert, in der

  • Figur 1 schematisch ein Schaltbild des neuerungsgemäßen Sicherheitsventiles zeigt.
  • Figur 2 zeigt schematisch in Draufsicht eine bevorzugte Ausführung des Sicherheitsventiles nach Figur 1.
An example embodiment of the innovation is explained below with reference to the drawing, in which
  • Figure 1 shows schematically a circuit diagram of the safety valve according to the innovation.
  • FIG. 2 shows schematically a top view of a preferred embodiment of the safety valve according to FIG. 1.

Das Sicherheitsventil 10 nach Figur 1 ist aufgebaut aus zwei Wegeventilen 12, 14, wobei jedes dieser beiden Wegeventile aus einem 3/2-Ventil 16 und einem 2/2-Ventil 18 besteht, die jeweils durch einen gemeinsamen Kolben 20 miteinander gekoppelt sind.The safety valve 10 according to FIG. 1 is constructed from two directional control valves 12, 14, each of these two directional control valves consisting of a 3/2-way valve 16 and a 2/2-way valve 18, each of which is coupled to one another by a common piston 20.

Ein Druckluftanschluß 22 ist parallel an die beiden 2/2-Ventile 18 angeschlossen, wobei jeweils über eine Drosselstelle 28 und Kanäle 58, 60 zwei Luftspeicher 30 mit Druckluft versorgt werden. Der Ausgang jedes Luftspeichers 30 ist je an ein Pilotventil 32 angeschlossen, durch welche die beiden Wegeventile 12, 14 angesteuert werden.A compressed air connection 22 is connected in parallel to the two 2/2-way valves 18, two air accumulators 30 being supplied with compressed air in each case via a throttle point 28 and channels 58, 60. The output of each air reservoir 30 is connected to a pilot valve 32, through which the two directional control valves 12, 14 are controlled.

In Figur 1 ist die Ruheposition des Sicherheitsventiles dargestellt, in welcher der Arbeitsanschluß 24 parallel über die beiden Wegeventile 16 zum Abluftanschluß 26 entlüftet ist.In Figure 1, the rest position of the safety valve is shown, in which the working connection 24 is vented in parallel via the two directional control valves 16 to the exhaust air connection 26.

Die beiden 2/2-Wegeventile 18 sind mittels der beiden Kanäle 44, 46 über Kreuz mit den beiden 3/2-Wegeventilen 16 verbunden.The two 2/2-way valves 18 are cross-connected to the two 3/2-way valves 16 by means of the two channels 44, 46.

Wird das Ventil nach Figur 1 in seine Schaltposition umgeschaltet, dann strömt die Druckluft vom Anschluß 22 über die beiden Wegeventile 18 über Kreuz zu den beiden Wegeventilen 16 und von diesen aus parallel zum Arbeitsanschluß 24, während der Entlüftungsanschluß 26 gesperrt ist. Die Umschaltung erfolgt durch Ansteuerung der beiden Pilotventile 32, über welche die Druckluft aus den Luftspeichern 30 auf die Antriebskolben 36 (Figur 2) der beiden Wegeventile 12, 14 geführt wird, wodurch deren Ventilkolben 20 in die Schaltposition umgeschaltet werden.If the valve according to FIG. 1 is switched into its switching position, then the compressed air flows from the connection 22 via the two directional control valves 18 crosswise to the two directional control valves 16 and from these parallel to the working connection 24, while the ventilation connection 26 is blocked. The switchover takes place by activating the two pilot valves 32, via which the compressed air from the air accumulators 30 is guided to the drive pistons 36 (FIG. 2) of the two directional control valves 12, 14, as a result of which their valve pistons 20 are switched to the switching position.

Figur 2 zeigt das Sicherheitsventil 10 ebenfalls in Ruhestellung.Figure 2 shows the safety valve 10 also in the rest position.

Die 3/2-Ventile jedes der beiden Wegeventile 12, 14 werden gebildet durch die Dichtungen 40 und den zugehörigen Kolben 20, während die 2/2-Ventile jedes Wegeventils 12, 14 durch die Dichtungen 42 und den zugehörigen Kolben 20 gebildet werden.The 3/2 valves of each of the two directional control valves 12, 14 are formed by the seals 40 and the associated piston 20, while the 2/2 valves of each directional control valve 12, 14 are formed by the seals 42 and the associated piston 20.

Das in Figur 2 linke 2/2-Ventil 18 ist über den Kreuzkanal 44 mit dem in Figur 2 rechten 3/2-Ventil 16 verbunden, und das in Figur 2 rechte 2/2-Ventil 18 ist über den Kreuzkanal 46 mit dem in Figur 2 linken 3/2-Ventil 16 verbunden.The 2/2 valve 18 on the left in FIG. 2 is connected via the cross channel 44 to the 3/2 valve 16 on the right in FIG. 2, and the 2/2 valve 18 on the right in FIG. 2 is connected to the valve in FIG Figure 2 left 3/2 valve 16 connected.

Die Anschlüsse 22, 24, 26 und ihre Verbindungskanäle zu den Wegeventilen 12, 14, die Verbindungskanäle 44, 46 zwischen den beiden Wegeventilen 12, 14, die Luftspeicher 30, die Kanäle 58, 60 zwischen den Luftspeichern 30 und den Kreuzkanälen 44, 46 und die Drosselstellen 28 sind sämtlich in einer gemeinsamen Grundplatte 34 ausgebildet, auf welcher die beiden Wegeventile 12, 14 montiert sind.The connections 22, 24, 26 and their connection channels to the directional control valves 12, 14, the connection channels 44, 46 between the two directional control valves 12, 14, the air accumulator 30, the channels 58, 60 between the air accumulator 30 and the cross ducts 44, 46 and the throttle points 28 are all formed in a common base plate 34 on which the two directional control valves 12, 14 are mounted.

In der dargestellten Ruheposition sind die Antriebskolben 36 der beiden Ventilkolben 20 nicht mit Druckluft beaufschlagt. Durch je eine Druckfeder 38 sind sie in ihrer Ruheposition gehalten.In the rest position shown, the drive pistons 36 of the two valve pistons 20 are not pressurized with compressed air. They are held in their rest position by a compression spring 38 each.

Die Druckluft strömt vom Anschluß 22 in die Kammern 48 ein, außerdem über die Drosselstellen 28 in die Kreuzkanäle 44, 46 und von dort in die Kammern 50 und 52. Die Verbindung zum Arbeitsanschluß 24 ist jedoch gesperrt, dieser ist vielmehr über die Kammern 54 und 56 zum Abluftanschluß 26 hin entlüftet. Von den Kreuzkanälen 44, 46 strömt die Druckluft ferner über die Kanäle 58, 60 in die Luftspeicher 30 und füllt diese. Werden die Pilotventile 32 erregt und umgeschaltet, so strömt die Druckluft aus den Luftspeichern 30 über die Pilotventile 32 zu den Antriebskolben 36 und beaufschlagt diese, wodurch die mit den Antriebskolben 36 verbundenen Ventilkolben 20 gegen die Kraft der jeweiligen Druckfeder 38 in ihre Schaltposition umgeschaltet werden, in welcher die bezogen auf Figur 2 unteren Enden der Ventilkolben 20, z.B. an geeigneten Anschlägen 62 anliegen.The compressed air flows from the connection 22 into the chambers 48, also via the throttling points 28 into the cross-channels 44, 46 and from there into the chambers 50 and 52. However, the connection to the working connection 24 is blocked, rather it is via the chambers 54 and 56 for exhaust air connection 26 vented. The compressed air also flows from the cross ducts 44, 46 via the ducts 58, 60 into the air reservoir 30 and fills them. If the pilot valves 32 are excited and switched over, the compressed air flows from the air reservoirs 30 via the pilot valves 32 to the drive piston 36 and acts on it, as a result of which the valve piston 20 connected to the drive piston 36 is switched into its switching position against the force of the respective compression spring 38, in which the lower ends of the valve pistons 20, for example in relation to FIG. 2, bear against suitable stops 62.

In dieser in der Zeichnung nicht dargstellten Schaltposition ist der Druckluftanschluß 22 über die Kammern 48, 50, die Kreuzkanäle 44, 46 und die Kammern 52, 54 mit dem Arbeitsanschluß 24 verbunden, während die Verbindung zwischen den Kammern 54 und den Kammern 56 durch die jeweilige Dichtung zwischen diesen beiden Kammern gesperrt ist, womit auch die Verbindung zwischen dem Arbeitsanschluß 24 und dem Abluftanschluß 26 geschlossen ist.In this switching position, not shown in the drawing, the compressed air connection 22 is connected to the working connection 24 via the chambers 48, 50, the cross channels 44, 46 and the chambers 52, 54, while the connection between the chambers 54 and the chambers 56 is made by the respective one Seal between these two chambers is blocked, whereby the connection between the working connection 24 and the exhaust air connection 26 is closed.

Der Druckluftanschluß 22 ist somit an die Eingänge der 2/2-Ventile 18 angeschlossen, deren Ausgänge über die Kreuzkanäle 44, 46 über Kreuz an die Eingänge der 3/2-Ventile 16 gelegt sind, während die Ausgänge der beiden letzteren entweder mit dem Arbeitsanschluß 24 oder mit dem Abluftanschluß 26 verbindbar sind.The compressed air connection 22 is thus connected to the inputs of the 2/2 valves 18, the outputs of which are connected via the cross channels 44, 46 to the inputs of the 3/2 valves 16, while the outputs of the latter two are connected either to the working connection 24 or can be connected to the exhaust air connection 26.

Da in der Ruheposition der beiden Wegeventile 12, 14 gemeinsame Arbeitanschluß 24 parallel über beide 3/2-Ventile 16 an den gemeinsamen Abluftanschluß 26 geführt ist, ist der Arbeitsanschluß 24 auch dann entlüftet, wenn bei einem der beiden Wegeventile 12 oder 14 oder einem der beiden Pilotventile 32 eine Störung auftritt.Since in the rest position of the two directional control valves 12, 14 common working connection 24 is guided in parallel via both 3/2-way valves 16 to the common exhaust air connection 26, the working connection 24 is also vented when one of the two directional control valves 12 or 14 or one of the a fault occurs in both pilot valves 32.

Claims (4)

1. Sicherheitsventil für druckmittel-betriebene Verbraucher, bestehend aus zwei über Kreuz miteinander gekoppelten Wegeventilen, dadurch gekennzeichnet, daß die beiden Wegeventile (12, 14) auf einer gemeinsamen Grundplatte (34) angeordnet sind.1. Safety valve for pressure medium-operated consumers, consisting of two cross-coupled directional valves, characterized in that the two directional valves (12, 14) are arranged on a common base plate (34). 2. Sicherheitsventil nach Anspruch 1, dadurch gekennzeichnet, daß in der gemeinsamen Grundplatte (34) ein Druckluftanschluß (22), ein Arbeitsanschluß (24) und ein Abluftanschluß (26), die Verbindungskanäle von diesen Anschlüssen (22, 24, 26) zu den beiden Wegeventilen (12, 14) und die Verbindungskanäle (44, 46) zwischen den beiden Wegeventilen (12, 14) ausgebildet sind.2. Safety valve according to claim 1, characterized in that in the common base plate (34) a compressed air connection (22), a working connection (24) and an exhaust air connection (26), the connecting channels from these connections (22, 24, 26) to the two directional valves (12, 14) and the connecting channels (44, 46) between the two directional valves (12, 14) are formed. 3. Sicherheitsventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in der gemeinsamen Grundplatte (34) je ein an den Druckluftanschluß (22) angeschlossener Luftspeicher (30) für jedes Wegeventil (12, 14) sowie je eine Drosselstelle (28) zwischen dem Druckluftanschluß (22) und jedem der Luftspeicher (30) ausgebildet ist.3. Safety valve according to claim 1 or 2, characterized in that in the common base plate (34) each have an air reservoir (30) connected to the compressed air connection (22) for each directional valve (12, 14) and a throttle point (28) between the Compressed air connection (22) and each of the air accumulator (30) is formed. 4. Sicherheitsventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß jedes der beiden Wegeventile (12, 14) aus einem 2/2-Ventil (18) und einem 3/2-Ventil (16) gebildet ist, die über einen gemeinsamen Ventilkolben (20) miteinander gekoppelt sind.4. Safety valve according to one of the preceding claims, characterized in that each of the two directional valves (12, 14) from a 2/2-valve (18) and a 3/2-valve (16) is formed, which have a common valve piston (20) are coupled together.
EP95105548A 1994-04-20 1995-04-12 Safety valve Expired - Lifetime EP0684392B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9406561U DE9406561U1 (en) 1994-04-20 1994-04-20 Safety valve
DE9406561U 1994-04-20

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Publication Number Publication Date
EP0684392A1 true EP0684392A1 (en) 1995-11-29
EP0684392B1 EP0684392B1 (en) 2000-03-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009046184A1 (en) * 2007-10-04 2009-04-09 Ross Operating Valve Company High throughput double valve with reduced outlet pressure during a faulted state
WO2011032364A1 (en) * 2009-09-18 2011-03-24 无锡市拓发自控设备有限公司 Safety control double valve for power-off protection press

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9701523L (en) * 1997-04-23 1998-06-22 Rudolf Westerberg Ab Tvåhandsmanöversystem
US8794123B2 (en) 2010-03-12 2014-08-05 Ross Operating Valve Company Double valve constructed from unitary single valves

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930571A1 (en) * 1979-07-27 1981-02-12 Technomatic Ag Aesch SAFETY VALVE
DE3421492A1 (en) * 1984-06-08 1985-12-12 Herion-Werke Kg, 7012 Fellbach Control valve
EP0558976A1 (en) * 1992-03-05 1993-09-08 Herion-Werke KG Safety valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930571A1 (en) * 1979-07-27 1981-02-12 Technomatic Ag Aesch SAFETY VALVE
DE3421492A1 (en) * 1984-06-08 1985-12-12 Herion-Werke Kg, 7012 Fellbach Control valve
EP0558976A1 (en) * 1992-03-05 1993-09-08 Herion-Werke KG Safety valve

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Development of the cross-flow double valve for potentially dangerous machines", POWER INTERNATIONAL, vol. 34, no. 399, MORDEN, pages 202 - 203, XP000023676 *
E. RUCHSER: "Neues pneumatisches Pressensicherheitsventil mit dynamischer Selbstüberwachung", ÖLHYDRAULIK UND PNEUMATIK, vol. 27, no. 12, MAINZ, pages 832 - 833 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009046184A1 (en) * 2007-10-04 2009-04-09 Ross Operating Valve Company High throughput double valve with reduced outlet pressure during a faulted state
US8028717B2 (en) 2007-10-04 2011-10-04 Ross Operating Valve Company High throughput double valve with reduced outlet pressure during a faulted state
CN101868633B (en) * 2007-10-04 2014-06-25 罗斯控制阀公司 High throughput double valve with reduced outlet pressure during a faulted state
DE112008002675B4 (en) 2007-10-04 2022-01-13 Ross Operating Valve Co. Dual valve with high flow and low discharge pressure in a fault condition
WO2011032364A1 (en) * 2009-09-18 2011-03-24 无锡市拓发自控设备有限公司 Safety control double valve for power-off protection press

Also Published As

Publication number Publication date
DE9406561U1 (en) 1994-07-14
EP0684392B1 (en) 2000-03-08
DE59507934D1 (en) 2000-04-13

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