EP1205669A1 - Block with two pilot-operated locking valves controlled by a single pilot valve - Google Patents

Block with two pilot-operated locking valves controlled by a single pilot valve Download PDF

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Publication number
EP1205669A1
EP1205669A1 EP01124025A EP01124025A EP1205669A1 EP 1205669 A1 EP1205669 A1 EP 1205669A1 EP 01124025 A EP01124025 A EP 01124025A EP 01124025 A EP01124025 A EP 01124025A EP 1205669 A1 EP1205669 A1 EP 1205669A1
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EP
European Patent Office
Prior art keywords
valve
spring
valves
block according
pilot
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
EP01124025A
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German (de)
French (fr)
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EP1205669B1 (en
Inventor
Wolfgang Koetter
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—Systems with load-holding valves

Definitions

  • the invention relates to a valve block according to the preamble of claim 1 defined art.
  • valve block is known from practice and is used as a structural unit in the field of hydraulics, for example, between a directional valve and a hydraulic one Consumer is arranged and a load holding function takes over.
  • the hydraulic consumer can, for example a tilt cylinder of a forklift.
  • Check valves of the valve block of the type mentioned in the introduction are known as hydraulic in previously known solutions unlockable check valves, pressure control valves or designed as counterbalance check valves. With these valves is to move the consumer, even when driving Load, always a pump pressure required. This is with energy consumption and usually with if necessary annoying noise.
  • valve closing member such valves is, for example, as Cartridge valve designed. Cartridge valves are expensive, however and lead to a high flow resistance.
  • valve closing elements that can be used for this are inexpensive Components that are also used in a variety of other applications can be used.
  • inventive Valve blocks are advantageously valve closing members can be used with large cross-sections, resulting in a favorable flow guidance in the check valves and thus a low flow resistance of the same can be achieved can.
  • the pilot valve is an unlockable check valve. This can be controlled directly with small flow rates be executed.
  • valve closing member is designed in this way is that when the pilot valve is locked, fluid pressure compensation between the spring chamber and the consumer side will be produced.
  • a limiting throttle educated in the Wall of the valve closing member a limiting throttle educated. The from then acts via the limiting choke load pressure exerted on the consumer side in the closing direction of the valve closing member.
  • the supply sides of the check valves are, for example connected with a directional valve.
  • the pilot valve is then preferably synchronized with the Directional control valve switched, i.e. in the open position of the directional valve the pilot valve is unlocked so that the spring chambers be relieved, and in the blocking position of the directional valve the pilot valve is switched to the blocking position, so that a fluid pressure equalization in the check valves between the respective spring chamber and the respective consumer side takes place and the valve closing member due the spring force acting on this closes.
  • valve block according to the invention is shown schematically simplified in the drawing.
  • valve block with two check valves the one with a tilt cylinder a forklift and on the other hand with a directional valve are connected.
  • the arrangement shown in the figure consists of a hydraulically operated tilt cylinder 2 for a mast 21 a forklift, a directional control valve 1 and one between the directional control valve 1 and the tilt cylinder 2 arranged Valve block 3.
  • directional valve 1 On the supply side, directional valve 1 has a Pressure line P and a return line R connected.
  • the directional control valve 1 has three switch positions, namely two Pass positions a and b and a blocking position 0. Von the directional control valve 1 branch off two lines 31 and 32 which lead to consumer connections D and C of valve block 3, each associated with a check valve 6 or 7 are formed in a housing 13 of the valve block 3 are.
  • the check valves 6 and 7 are on the consumer side via connections A and B and lines 33 and 34 with the Tilt cylinder 2 of the mast 21 connected.
  • the mast 21 can between an angle - ⁇ and an angle + ⁇ pivoted continuously become.
  • the check valves 6 and 7 serve to control the load on the Tilt cylinder 2 acts to keep static. The fine control the load takes place solely with the directional valve 1.
  • the check valves 6 and 7 each have a partially cylindrical trained, guided in a corresponding hole Valve closing member 26 or 27, which with a the housing 13 of the valve block 3 formed valve seat 28 or 29 interacts.
  • valve rooms 4 and 5 each have an opening 51 and 52, respectively a line 42 or 52 is connected to one two spring chambers 4 and 5, that is, two check valves 6 and 7, assigned pilot valve 10, which here as unlockable, for example electrically operated check valve is formed and connected to a tank T. is.
  • a check valve is located in each of the lines 42 and 52 8 or 9 arranged in the direction of the spring chambers 4 or 5 blocks, so that a leakage flow between the spring chambers 4th and 5 is excluded.
  • valve block 3 The operation of the valve block 3 is described below of the check valve shown on the left in the single figure 6 described in an exemplary manner.
  • the blocking position of the blocking valve 6 is shown in the figure. This position is given when the unlockable Check valve 10 is switched to the blocking position. To directional valve 1 is also located at this point in time in the locked position, i.e. in switch position 0.
  • valve closing member 26 To open the check valve 6, i.e. if the directional valve 1 is brought into one of the passage positions a or b the pilot valve 10 switched to the open position.
  • the valve chamber 4 In order to the valve chamber 4 is relieved towards the tank T. ever according to the direction of fluid movement, either the over opens the supply side D on a circular surface 14 of the valve closing member 26 acting, exerted via the pump line P. Pressure or the consumer side B on the Valve closing member 26 acting load pressure the valve closing member 26.
  • the one so exerted on the valve closing member 26 Pressure must of course be greater than that Pressure applied by the spring 61 in the opposite Direction is exerted on the valve closing member 26.
  • valve block 3 The control of the valve block 3 shown here is one so-called “black and white” control. This means that both check valves 6 and 7 either in the open position or are in the locked position.
  • valve block after the Invention not to the preferred described above Embodiment is limited. Rather, the valve block according to the invention in connection with any Consumers as well as with or without an upstream Directional control valve can be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Check Valves (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The valve block is fitted between a path valve and a hydraulic user unit, taking over a load-holding function, where the user unit can be a tilt cylinder in a forklift truck. It incorporates at least two stop valves (6,7), which have a valve closure member (26,27), which works in conjunction with a valve seat (28,29) and in a stop position separates a user side (A,B) from a supply side (C,D). By means of at least one spring (61,62) in a spring chamber (4,5) it is loaded in the stop direction. The spring chamber of each of the stop valves is connected with a pre-control valve (10), which is a releasable check valve.

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Ventilblock gemäß der im Oberbegriff des Patentanspruches 1 näher definierten Art.The invention relates to a valve block according to the preamble of claim 1 defined art.

Ein solcher Ventilblock ist aus der Praxis bekannt und wird beispielsweise im Bereich der Hydraulik als Baueinheit eingesetzt, die zwischen einem Wegeventil und einem hydraulischen Verbraucher angeordnet ist und eine Lasthaltefunktion übernimmt. Der hydraulische Verbraucher kann beispielsweise ein Neigezylinder eines Gabelstaplers sein.Such a valve block is known from practice and is used as a structural unit in the field of hydraulics, for example, between a directional valve and a hydraulic one Consumer is arranged and a load holding function takes over. The hydraulic consumer can, for example a tilt cylinder of a forklift.

Sperrventile des Ventilblocks der einleitend genannten Art sind bei bisher bekannten Lösungen als hydraulisch entsperrbare Rückschlagventile, Druckhalteventile oder auch als Senkbremssperrventile ausgebildet. Bei diesen Ventilen ist zur Bewegung des Verbrauchers, und zwar auch bei antreibender Last, stets ein Pumpendruck erforderlich. Dies ist mit Energieverbrauch und in der Regel mit gegebenenfalls störender Geräuschentwicklung verbunden.Check valves of the valve block of the type mentioned in the introduction are known as hydraulic in previously known solutions unlockable check valves, pressure control valves or designed as counterbalance check valves. With these valves is to move the consumer, even when driving Load, always a pump pressure required. This is with energy consumption and usually with if necessary annoying noise.

Es ist auch bekannt, die Sperrventile als elektrisch entsperrbare Rückschlagventile auszuführen. Das Ventilschließglied solcher Ventile ist dabei beispielsweise als Patronenventil ausgebildet. Patronenventile sind jedoch kostenintensiv und führen zu einem hohen Durchflußwiderstand.It is also known to use the check valves as electric unlockable check valves. The valve closing member such valves is, for example, as Cartridge valve designed. Cartridge valves are expensive, however and lead to a high flow resistance.

Vorteile der ErfindungAdvantages of the invention

Der vorgeschlagene Ventilblock mit den Merkmalen nach dem Oberbegriff des Patentanspruches 1, bei dem der Federraum von jedem der vorzugsweise zwei Sperrventile mit einem jedem der Sperrventile zugeordneten Vorsteuerventil verbunden ist, hat demgegenüber den Vorteil, daß das Vorsteuerventil den Entsperrvorgang der Sperrventile auslöst und für alle bzw. beide Sperrventile nur ein einziges Vorsteuerventil erforderlich ist.The proposed valve block with the features according to the Preamble of claim 1, in which the spring chamber of each of the preferably two check valves with each connected to the check valve associated pilot valve has the advantage that the pilot valve triggers the unlocking process of the check valves and for everyone or both check valves only a single pilot valve is required.

Mittels entsprechender Schaltung des Vorsteuerventils kann bei dem Ventilblock nach der Erfindung der Federraum der Sperrventile entlastet werden, so daß letztere allein durch den von der Verbraucherseite oder der Versorgerseite auf die Ventilschließglieder jeweils wirkenden Druck geöffnet werden können.By means of an appropriate circuit of the pilot valve in the valve block according to the invention of the spring chamber Check valves are relieved, so that the latter through from the consumer side or the supplier side the valve closing members are each open to pressure can be.

Die hierfür einsetzbaren Ventilschließglieder sind kostengünstige Bauteile, die auch in einer Vielzahl weiterer Anwendungen zum Einsatz kommen können. Bei dem erfindungsgemäßen Ventilblock sind vorteilhafterweise Ventilschließglieder mit großen Querschnitten einsetzbar, wodurch eine günstige Strömungsführung in den Sperrventilen und damit ein geringer Durchflußwiderstand derselben erreicht werden kann.The valve closing elements that can be used for this are inexpensive Components that are also used in a variety of other applications can be used. In the inventive Valve blocks are advantageously valve closing members can be used with large cross-sections, resulting in a favorable flow guidance in the check valves and thus a low flow resistance of the same can be achieved can.

Nach einer bevorzugten Ausführungsform der Erfindung ist das Vorsteuerventil ein entsperrbares Rückschlagventil. Dieses kann bei kleinen Durchflußmengen direkt gesteuert ausgeführt sein.According to a preferred embodiment of the invention the pilot valve is an unlockable check valve. This can be controlled directly with small flow rates be executed.

Um einen Leckfluß zwischen den Federräumen der beiden Sperrventile des Ventilblocks und mithin eine Fehlfunktion der Sperrventile zu verhindern, liegt nach einer bevorzugten Ausführungsform der Erfindung zwischen den Federräumen und dem Vorsteuerventil jeweils ein in Richtung des jeweiligen Federraums sperrendes Rückschlagventil.To leak flow between the spring spaces of the two Check valves of the valve block and therefore a malfunction Preventing the check valves is a preferred one Embodiment of the invention between the spring chambers and the pilot valve one in the direction of the respective Spring check valve.

Vorteilhaft ist es, wenn das Ventilschließglied so ausgeführt ist, daß bei gesperrtem Vorsteuerventil ein Fluiddruckausgleich zwischen dem Federraum und der Verbraucherseite hergestellt wird. Hierzu ist beispielsweise in der Wandung des Ventilschließglieds eine Begrenzungsdrossel ausgebildet. Über die Begrenzungsdrossel wirkt dann der von der Verbraucherseite ausgeübte Lastdruck in Schließrichtung des Ventilschließglieds.It is advantageous if the valve closing member is designed in this way is that when the pilot valve is locked, fluid pressure compensation between the spring chamber and the consumer side will be produced. For example, in the Wall of the valve closing member a limiting throttle educated. The from then acts via the limiting choke load pressure exerted on the consumer side in the closing direction of the valve closing member.

Die Versorgerseiten der Sperrventile sind beispielsweise mit einem Wegeventil verbunden. Bei dieser Ausführungsform wird dann das Vorsteuerventil vorzugsweise synchron zu dem Wegeventil geschaltet, d.h. in Durchlaßstellung des Wegeventils wird das Vorsteuerventil entsperrt, so daß die Federräume entlastet werden, und in Sperrstellung des Wegeventils wird das Vorsteuerventil in Sperrstellung geschaltet, so daß in den Sperrventilen ein Fluiddruckausgleich zwischen dem jeweiligen Federraum und der jeweiligen Verbraucherseite erfolgt und das Ventilschließglied aufgrund der auf dieses wirkenden Federkraft schließt.The supply sides of the check valves are, for example connected with a directional valve. In this embodiment the pilot valve is then preferably synchronized with the Directional control valve switched, i.e. in the open position of the directional valve the pilot valve is unlocked so that the spring chambers be relieved, and in the blocking position of the directional valve the pilot valve is switched to the blocking position, so that a fluid pressure equalization in the check valves between the respective spring chamber and the respective consumer side takes place and the valve closing member due the spring force acting on this closes.

Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes nach der Erfindung ergeben sich aus der Beschreibung, der Zeichnung und den Patentansprüchen.Further advantages and advantageous configurations of the object according to the invention emerge from the description, the drawing and the claims.

Zeichnungdrawing

Ein Ausführungsbeispiel des Ventilblocks nach der Erfindung ist in der Zeichnung schematisch vereinfacht dargestellt.An embodiment of the valve block according to the invention is shown schematically simplified in the drawing.

Die einzige Figur der Zeichnung zeigt einen Ventilblock mit zwei Sperrventilen, die einerseits mit einem Neigezylinder eines Gabelstaplers und andererseits mit einem Wegeventil verbunden sind.The only figure in the drawing shows a valve block with two check valves, the one with a tilt cylinder a forklift and on the other hand with a directional valve are connected.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Die in der Figur dargestellte Anordnung besteht aus einem hydraulisch betätigten Neigezylinder 2 für einen Hubmast 21 eines Gabelstaplers, einem Wegeventil 1 sowie einem zwischen dem Wegeventil 1 und dem Neigezylinder 2 angeordneten Ventilblock 3. Versorgerseitig ist das Wegeventil 1 mit einer Druckleitung P sowie einer Rückflußleitung R verbunden.The arrangement shown in the figure consists of a hydraulically operated tilt cylinder 2 for a mast 21 a forklift, a directional control valve 1 and one between the directional control valve 1 and the tilt cylinder 2 arranged Valve block 3. On the supply side, directional valve 1 has a Pressure line P and a return line R connected.

Das Wegeventil 1 hat drei Schaltstellungen, nämlich zwei Durchlaßstellungen a und b sowie eine Sperrstellung 0. Von dem Wegeventil 1 zweigen zwei Leitungen 31 und 32 ab, die zu Verbraucheranschlüssen D und C des Ventilblocks 3 führen, die jeweils einem Sperrventil 6 bzw. 7 zugeordnet sind, die in einem Gehäuse 13 des Ventilblocks 3 ausgebildet sind. Verbraucherseitig sind die Sperrventile 6 und 7 über Anschlüsse A und B und Leitungen 33 bzw. 34 mit dem Neigezylinder 2 des Hubmastes 21 verbunden.The directional control valve 1 has three switch positions, namely two Pass positions a and b and a blocking position 0. Von the directional control valve 1 branch off two lines 31 and 32 which lead to consumer connections D and C of valve block 3, each associated with a check valve 6 or 7 are formed in a housing 13 of the valve block 3 are. The check valves 6 and 7 are on the consumer side via connections A and B and lines 33 and 34 with the Tilt cylinder 2 of the mast 21 connected.

Mittels des Neigezylinders 2 kann der Hubmast 21 zwischen einem Winkel -α und einem Winkel +α stufenlos geschwenkt werden.By means of the tilt cylinder 2, the mast 21 can between an angle -α and an angle + α pivoted continuously become.

Die Sperrventile 6 und 7 dienen dazu, die Last, die auf den Neigezylinder 2 wirkt, statisch zu halten. Die Feinsteuerung der Last erfolgt allein mit dem Wegeventil 1.The check valves 6 and 7 serve to control the load on the Tilt cylinder 2 acts to keep static. The fine control the load takes place solely with the directional valve 1.

Die Sperrventile 6 und 7 weisen jeweils ein teils zylindrisch ausgebildetes, in einer entsprechenden Bohrung geführtes Ventilschließglied 26 bzw. 27 auf, das mit einem an dem Gehäuse 13 des Ventilblocks 3 ausgebildeten Ventilsitz 28 bzw. 29 zusammenwirkt.The check valves 6 and 7 each have a partially cylindrical trained, guided in a corresponding hole Valve closing member 26 or 27, which with a the housing 13 of the valve block 3 formed valve seat 28 or 29 interacts.

An der dem Ventilsitz 28 bzw. 29 abgewandten Seite sind die Ventilschließglieder 26 und 27 mittels Federn 61 bzw. 62 in Richtung des Ventilsitzes 28 bzw. 29 belastet. Die Federn 61 und 62 sind in Federräumen 4 und 5 angeordnet. Die Ventilräume 4 und 5 haben jeweils eine Öffnung 51 bzw. 52, an die eine Leitung 42 bzw. 52 angeschlossen ist, die zu einem beiden Federräumen 4 und 5, also beiden Sperrventilen 6 und 7, zugeordneten Vorsteuerventil 10 führen, das hier als entsperrbares, beispielsweise elektrisch betätigtes Rückschlagventil ausgebildet ist und mit einem Tank T verbunden ist.On the side facing away from the valve seat 28 and 29, respectively Valve closing members 26 and 27 by means of springs 61 and 62 in Direction of the valve seat 28 or 29 loaded. The feathers 61 and 62 are arranged in spring chambers 4 and 5. The valve rooms 4 and 5 each have an opening 51 and 52, respectively a line 42 or 52 is connected to one two spring chambers 4 and 5, that is, two check valves 6 and 7, assigned pilot valve 10, which here as unlockable, for example electrically operated check valve is formed and connected to a tank T. is.

In den Leitungen 42 und 52 ist jeweils ein Rückschlagventil 8 bzw. 9 angeordnet, das in Richtung der Federräume 4 bzw. 5 sperrt, so daß ein Leckfluß zwischen den Federräumen 4 und 5 ausgeschlossen ist.A check valve is located in each of the lines 42 and 52 8 or 9 arranged in the direction of the spring chambers 4 or 5 blocks, so that a leakage flow between the spring chambers 4th and 5 is excluded.

Die Funktionsweise des Ventilblocks 3 wird nachfolgend anhand des in der einzigen Figur links dargestellten Sperrventils 6 in beispielhafter Weise beschrieben.The operation of the valve block 3 is described below of the check valve shown on the left in the single figure 6 described in an exemplary manner.

In der Figur ist die Sperrstellung des Sperrventils 6 dargestellt. Diese Stellung ist gegeben, wenn das entsperrbare Rückschlagventil 10 in Sperrstellung geschaltet ist. Zu diesem Zeitpunkt befindet sich das Wegeventil 1 ebenfalls in Sperrstellung, d.h. in Schaltstellung 0.The blocking position of the blocking valve 6 is shown in the figure. This position is given when the unlockable Check valve 10 is switched to the blocking position. To directional valve 1 is also located at this point in time in the locked position, i.e. in switch position 0.

In Sperrstellung des Sperrventils 6 wirkt der über den Neigezylinder 2 auf die Verbraucherseite B ausgeübte Lastdruck über einen das Ventilschließglied 26 umgebenden, wenigstens teilweise ringartigen Spalt 11 und eine in der Wandung des Ventilschließglieds 26 ausgebildete Begrenzungsdrossel 12 in den Federraum 4. In diesem Zustand herrscht also in dem Federraum 4 der über die Versorgerseite B ausgeübte Fluiddruck. Mittels des über die Federn 61 auf das Ventilschließglied 26 ausgeübten Drucks wird letzteres in seinen Ventilsitz 28 gepreßt.In the blocking position of the blocking valve 6, it acts via the tilt cylinder 2 load pressure exerted on consumer side B. via a valve closure member 26, at least partially annular gap 11 and one in the wall of the Valve closing member 26 formed limiting throttle 12th in the spring chamber 4. In this state there is therefore in the Spring chamber 4 is the fluid pressure exerted via supply side B. By means of the springs 61 on the valve closing member The pressure exerted is the latter in his Valve seat 28 pressed.

Zum Öffnen des Sperrventils 6, d.h. wenn das Wegeventil 1 in eine der Durchlaßstellungen a oder b gebracht wird, wird das Vorsteuerventil 10 in Durchlaßstellung geschaltet. Damit wird der Ventilraum 4 zu dem Tank T hin entlastet. Je nach Fluidbewegungsrichtung öffnet nun entweder der über die Versorgerseite D auf eine Kreisfläche 14 des Ventilschließglieds 26 wirkende, über die Pumpenleitung P ausgeübte Druck oder der über die Verbraucherseite B auf das Ventilschließglied 26 wirkende Lastdruck das Ventilschließglied 26. Der so auf das Ventilschließglied 26 ausgeübte Druck muß selbstverständlich größer sein als derjenige Druck, der mittels der Feder 61 in die entgegengesetzte Richtung auf das Ventilschließglied 26 ausgeübt wird.To open the check valve 6, i.e. if the directional valve 1 is brought into one of the passage positions a or b the pilot valve 10 switched to the open position. In order to the valve chamber 4 is relieved towards the tank T. ever according to the direction of fluid movement, either the over opens the supply side D on a circular surface 14 of the valve closing member 26 acting, exerted via the pump line P. Pressure or the consumer side B on the Valve closing member 26 acting load pressure the valve closing member 26. The one so exerted on the valve closing member 26 Pressure must of course be greater than that Pressure applied by the spring 61 in the opposite Direction is exerted on the valve closing member 26.

Wenn nun das Wegeventil 1 wieder in die Sperrstellung 0 gebracht wird, wird damit auch das Rückschlagventil 10 in seine Sperrstellung gebracht, und somit baut sich über den Spalt 11 und die Begrenzungsdrossel 12 wieder der über die Verbraucherseite B wirkende Druck in dem Ventilraum 4 auf. Dies bewirkt wiederum, daß das Ventilschließglied 26 mittels der Feder 61 in seinen Sitz 28 gepreßt wird.If the directional valve 1 is now brought into the blocking position 0 the check valve 10 in brought his locking position, and thus builds over the Gap 11 and the limiting throttle 12 again over the Consumer side B acting pressure in the valve chamber 4. This in turn causes the valve closing member 26 by means of the spring 61 is pressed into its seat 28.

Die Steuerung des hier dargestellten Ventilblocks 3 ist eine sogenannte "Schwarz/weiß"-Steuerung. Dies bedeutet, daß sich beide Sperrventile 6 und 7 entweder in Durchlaßstellung oder in Sperrstellung befinden. The control of the valve block 3 shown here is one so-called "black and white" control. This means that both check valves 6 and 7 either in the open position or are in the locked position.

Es versteht sich, daß der Einsatz des Ventilblocks nach der Erfindung nicht auf das vorstehend beschriebene, bevorzugte Ausführungsbeispiel beschränkt ist. Vielmehr kann der Ventilblock nach der Erfindung in Verbindung mit jedem beliebigen Verbraucher sowie mit als auch ohne vorgeschaltetem Wegeventil eingesetzt werden.It is understood that the use of the valve block after the Invention not to the preferred described above Embodiment is limited. Rather, the valve block according to the invention in connection with any Consumers as well as with or without an upstream Directional control valve can be used.

Claims (8)

Ventilblock, umfassend mindestens zwei Sperrventile (6, 7), die jeweils ein Ventilschließglied (26, 27) aufweisen, das mit einem Ventilsitz (28, 29) zusammenwirkt und in Sperrstellung eine Verbraucherseite (A, B) von einer Versorgerseite (C, D) trennt, und das mittels mindestens einer in einem Federraum (4, 5) angeordneten Feder (61, 62) in Sperrichtung belastet ist, dadurch gekennzeichnet, daß der Federraum (4, 5) von jedem der Sperrventile (6, 7) mit einem jedem Sperrventil (6, 7) zugeordneten Vorsteuerventil (10) verbunden ist.Valve block, comprising at least two shut-off valves (6, 7), each having a valve closing member (26, 27) which interacts with a valve seat (28, 29) and, in the locked position, a consumer side (A, B) from a supply side (C, D ), and which is loaded in the reverse direction by means of at least one spring (61, 62) arranged in a spring chamber (4, 5), characterized in that the spring chamber (4, 5) of each of the check valves (6, 7) has a each check valve (6, 7) associated pilot valve (10) is connected. Ventilblock nach Anspruch 1, dadurch gekennzeichnet, daß das Vorsteuerventil (10) ein entsperrbares Rückschlagventil ist.Valve block according to claim 1, characterized in that the pilot valve (10) is an unlockable check valve. Ventilblock nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zwischen den Federräumen (4, 5) der mindestens zwei Sperrventile (6, 7) und dem Vorsteuerventil (10) jeweils ein in Richtung des Federraums (4, 5) sperrendes Rückschlagventil (8, 9) liegt, das einen Leckfluß zwischen den Federräumen (4, 5) verhindert.Valve block according to claim 1 or 2, characterized in that between the spring spaces (4, 5) of the at least two shut-off valves (6, 7) and the pilot valve (10) in each case a non-return valve (8, 5) blocking in the direction of the spring space (4, 5) 9), which prevents leakage between the spring chambers (4, 5). Ventilblock nach einem der Ansprüche 1 oder 3, dadurch gekennzeichnet, daß die Sperrventile (6, 7) beim Öffnen des Vorsteuerventils (10) durch den von der Verbraucherseite (A, B) oder der Versorgerseite (C, D) auf das jeweilige Ventilschließglied (26, 27) wirkenden Druck öffnen.Valve block according to one of claims 1 or 3, characterized in that the shut-off valves (6, 7) when opening the pilot valve (10) from the consumer side (A, B) or the supply side (C, D) to the respective valve closing member ( 26, 27) open pressure. Ventilblock nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das jeweilige Ventilschließglied (26, 27) eine Wandung aufweist, in der eine Begrenzungsdrossel (12) ausgebildet ist, welche eine Verbindung zwischen der Verbraucherseite (A, B) und dem Federraum (4, 5) herstellt.Valve block according to one of claims 1 to 4, characterized in that the respective valve closing member (26, 27) has a wall in which a limiting throttle (12) is formed, which connects the consumer side (A, B) and the spring chamber ( 4, 5). Ventilblock nach Anspruch 5, dadurch gekennzeichnet, daß zwischen der Begrenzungsdrossel (12) eines jeden Ventilschließglieds (26, 27) und der jeweilig angrenzenden Verbraucherseite (A, B) jeweils ein wenigstens teilweise ringartiger Spalt (11) ausgebildet ist.Valve block according to claim 5, characterized in that an at least partially annular gap (11) is formed between the limiting throttle (12) of each valve closing member (26, 27) and the respectively adjacent consumer side (A, B). Ventilblock nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Versorgerseiten (C, D) der Sperrventile (6, 7) mit einem Wegeventil (1) verbunden sind.Valve block according to one of claims 1 to 6, characterized in that the supply sides (C, D) of the check valves (6, 7) are connected to a directional valve (1). Ventilblock nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Verbraucherseiten (A, B) der Sperrventile (6, 7) mit einem Zylinder (2) zum Einstellen des Neigewinkels (+α, -α) eines Gabelstaplerhubmastes (21) verbunden sind.Valve block according to one of claims 1 to 7, characterized in that the consumer sides (A, B) of the shut-off valves (6, 7) are connected to a cylinder (2) for adjusting the tilt angle (+ α, -α) of a fork lift mast (21) are.
EP01124025A 2000-11-09 2001-10-09 Block with two pilot-operated locking valves controlled by a single pilot valve Expired - Lifetime EP1205669B1 (en)

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DE10055419A DE10055419A1 (en) 2000-11-09 2000-11-09 manifold
DE10055419 2000-11-09

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FR2941767A1 (en) * 2009-02-05 2010-08-06 Air Liquide Cryogenic liquid-vapor equilibrium mixture filling block for cryogenic tank of tanker lorry, has valves arranged on corresponding pipes, where one of pipes has flap that avoids circulation of fluid from downstream towards upstream
US20120311817A1 (en) * 2010-09-06 2012-12-13 Dianora Gosio Door closer, particularly for glass doors

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DE102008059436B3 (en) * 2008-11-27 2010-01-07 Parker Hannifin Gmbh & Co. Kg Hydraulic control valve for controlling double acting working cylinder, has annular channel formed in housing, and recess producing connection of contacts, where dimension of recess is twice larger than another recesse

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US3068596A (en) * 1961-11-24 1962-12-18 Caterpillar Tractor Co Hydraulic circuit for actuation of an earthmoving scraper bowl
US3981479A (en) * 1974-06-14 1976-09-21 Snap-Tite, Inc. Check valve
JPS5943201A (en) * 1982-09-02 1984-03-10 Hitachi Constr Mach Co Ltd Hydraulic driving gear
DE3723672A1 (en) * 1987-07-17 1989-01-26 Wessel Hydraulik Non-return valve with an integrated pressure-regulating piston

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US3068596A (en) * 1961-11-24 1962-12-18 Caterpillar Tractor Co Hydraulic circuit for actuation of an earthmoving scraper bowl
US3981479A (en) * 1974-06-14 1976-09-21 Snap-Tite, Inc. Check valve
JPS5943201A (en) * 1982-09-02 1984-03-10 Hitachi Constr Mach Co Ltd Hydraulic driving gear
DE3723672A1 (en) * 1987-07-17 1989-01-26 Wessel Hydraulik Non-return valve with an integrated pressure-regulating piston

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2941767A1 (en) * 2009-02-05 2010-08-06 Air Liquide Cryogenic liquid-vapor equilibrium mixture filling block for cryogenic tank of tanker lorry, has valves arranged on corresponding pipes, where one of pipes has flap that avoids circulation of fluid from downstream towards upstream
US20120311817A1 (en) * 2010-09-06 2012-12-13 Dianora Gosio Door closer, particularly for glass doors
US8443487B2 (en) * 2010-09-06 2013-05-21 In & Tec S.R.L. Door closer with a braking mechanism
US8677560B2 (en) * 2010-09-06 2014-03-25 In&Tec S.R.L. Door closer, particularly for glass doors

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EP1205669B1 (en) 2005-06-01
DE50106380D1 (en) 2005-07-07

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