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EP0590339A1 - Directional valve - Google Patents

Directional valve Download PDF

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Publication number
EP0590339A1
EP0590339A1 EP93114071A EP93114071A EP0590339A1 EP 0590339 A1 EP0590339 A1 EP 0590339A1 EP 93114071 A EP93114071 A EP 93114071A EP 93114071 A EP93114071 A EP 93114071A EP 0590339 A1 EP0590339 A1 EP 0590339A1
Authority
EP
European Patent Office
Prior art keywords
connection
directional control
control valve
consumer
shaped piece
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
EP93114071A
Other languages
German (de)
French (fr)
Other versions
EP0590339B1 (en
Inventor
Helmut Ing. Ott
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 EP0590339A1 publication Critical patent/EP0590339A1/en
Application granted granted Critical
Publication of EP0590339B1 publication Critical patent/EP0590339B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—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
    • F15B13/0832—Modular valves
    • 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • 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
    • F15B13/0821—Attachment or sealing of modular units to each other
    • F15B13/0825—Attachment or sealing of modular units to each other the modular elements being mounted on a common member, e.g. on a rail
    • 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
    • F15B13/0878—Assembly of modular units
    • F15B13/0896—Assembly of modular units using different types or sizes of valves
    • 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
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7879—Resilient material valve
    • Y10T137/7888—With valve member flexing about securement
    • Y10T137/789—Central mount
    • 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
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87885—Sectional block structure
    • 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
    • Y10T137/87917—Flow path with serial valves and/or closures
    • Y10T137/88054—Direct response normally closed valve limits direction of flow

Definitions

  • the invention relates to a directional control valve for compressed air, which is mounted in particular on a battery bar, with a housing in which a control slide is arranged, which controls the connection between an inlet connection, at least one consumer connection and at least one ventilation connection, with a between the ventilation connection and the consumer connection Throttle check valve is arranged.
  • the invention is therefore based on the object of equipping a directional control valve of the type mentioned at the outset in a simple, compact and space-saving design with a throttle check valve (or the required number of throttle check valves).
  • the throttle check valve is installed directly in the housing of the directional valve transversely to the longitudinal axis of the control slide.
  • a throttle check valve is provided for each consumer connection.
  • the throttle element and the check element of the throttle check valve consist of a single shaped piece, which is formed in particular from a flexible, elastic plastic material.
  • the fitting is advantageously fastened on the shaft of an adjusting screw, by means of which the flow cross section between the housing of the directional control valve and the fitting can be changed.
  • a step bore is expediently formed in the housing, one step of which together with the shaped piece forms the throttle element and the other step together with the shaped piece forms the check element.
  • the adjusting screw is expediently accessible from the outside, so that the throttle cross section of the throttle check valve can be changed even when the directional control valve is mounted on the battery strip. By fastening the fitting on the shaft of the set screw, the latter is secured against unscrewing.
  • Figure 1 shows a top view schematically shows two directional control valves 10 which are mounted side by side on a common connecting plate or battery strip 12. With such a design, all directional control valves 10 are connected to a common inlet line and to common ventilation lines.
  • FIG. 2 shows a cross section through one of the directional control valves 10 according to FIG. 1.
  • the directional control valve 10 according to FIG. 2 is mounted on a battery strip 12, through which an inlet line 72 and two ventilation lines 74, 76 extend, which are common to all directional control valves 10.
  • a control slide 14 is installed together with an associated seal set 16.
  • the control slide 14 is connected at each of its two axial ends to a working piston 44 and 46, the latter of which can be pressurized with compressed air via working connections 40, 42, whereby the control slide 14 is switched to the desired position.
  • a working piston 44 and 46 the latter of which can be pressurized with compressed air via working connections 40, 42, whereby the control slide 14 is switched to the desired position.
  • the operation of the directional control valve shown here is known and is therefore not described in detail.
  • An inlet connection 18 (which is connected to the inlet line 72) is formed in the housing 48, furthermore two consumer connections 24, 26 (the one to two consumers, which are not specified in any more detail) are connected), and two ventilation connections 32, 34 (which are connected to the ventilation lines 74, 76, respectively).
  • the inlet connection 18 opens into an inlet chamber 22, the consumer connections 24, 26 open out correspondingly in consumer chambers 28, 30 and the ventilation connections 32, 34 open out accordingly in ventilation chambers 36, 38.
  • the inlet chamber 22, the consumer chambers 28 and 30, and the ventilation chambers 36 and 38 are parts of the bore in which the control slide 14 is arranged to be axially movable.
  • a throttle check valve is installed between the consumer port 24 and the vent port 32 and also between the consumer port 26 and the vent port 34, the throttle check valve 50 between the consumer port 24 and the vent port 32 being shown in FIG.
  • the throttle valve 50 is arranged in the region of the ventilation chamber 36.
  • a bore 32 is formed in the housing 48, the axis of which extends transversely to the longitudinal axis of the control slide, and which is connected to the ventilation chamber 36.
  • the bore 52 is expanded to form a shoulder 54 to form a bore 56, the diameter of which is larger than that of the bore 52.
  • the bore 56 is connected to the vent connection 32.
  • the upper area of the bore 52 in FIG. 3 is designed as a threaded bore 58, into which an adjusting screw 60 is screwed, which is accessible and operable from the outside.
  • the adjusting screw 60 has a shaft 62 with a reduced diameter, on the lower end of which in FIG. 3 a shaped piece 64 attached, e.g. B. is held or clamped between two unspecified collars on the shaft 62.
  • the generally annular fitting 64 has a central bore and an annular lip 68 which, as shown, abuts the wall of the bore 56.
  • the shaped part expediently consists of a flexible, elastic plastic material, so that it can be pushed onto the shaft from the end of the shaft 62 via the outer collar until it engages between the two collars.
  • An annular gap 70 is formed between the shaped piece 64 and the shoulder 54, that is to say the annular edge between the bores 52 and 56.
  • the area of this annular gap that is to say the flow cross section between the housing 48 and the shaped piece 64, can be changed by the adjusting screw which is accessible from the outside and can thus be adjusted as required.
  • the compressed air flows back from the consumer connection 24 via the consumer chamber 28 and the ventilation chamber 36 to the ventilation connection 32 (as shown in FIG. 2), the air first flows through the annular gap 70 into the space 66, which is part of the bore 56 , whereupon the lip 68 of the fitting 64 is lifted off the wall of the bore 56 and opens the passage to the vent connection 32.
  • the compressed air can thus flow back from the consumer connection 24 to the vent connection 32, this backflow being able to be throttled as required by changing the throttle cross section.
  • a dynamic pressure occurs in the ventilation line 74 and the compressed air therefore tries to flow back through the throttle check valve in the opposite direction, i.e.
  • the lip 68 of the fitting 64 lies against the wall of the bore 56 and blocks the flow of compressed air in this direction. An undesired exposure to the consumer connected to the consumer connection 24 is thus prevented.
  • the fitting 64 thus forms (in connection with the housing 48) the throttle element and the check element of the throttle check valve 50.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Check Valves (AREA)
  • Valve Housings (AREA)
  • Multiple-Way Valves (AREA)

Abstract

The invention relates to a directional valve (10) for compressed air, having a supply connection (72), at least one consumer connection (24) and at least one vent connection (74). A one-way restrictor is fitted between the vent connection (74) and the consumer connection (24) in order to prevent the consumer from being unintentionally acted upon if a dynamic pressure occurs during the venting. The one-way restrictor is fitted directly in the housing (48) of the directional valve (10) transversely to the bore of its spool (14), as a result of which a simple, compact and space-saving design and arrangement of the one-way restrictor is obtained. <IMAGE>

Description

Die Erfindung betrifft ein Wegeventil für Druckluft, das insbesondere auf einer Batterieleiste montiert ist, mit einem Gehäuse, in dem ein Steuerschieber angeordnet ist, der die Verbindung zwischen einem Zulaufanschluß, wenigstens einem Verbraucheranschluß und wenigstenseinem Entlüftungsanschluß steuert, wobei zwischen dem Entlüftungsanschluß und dem Verbraucheranschluß ein Drosselrückschlagventil angeordnet ist.The invention relates to a directional control valve for compressed air, which is mounted in particular on a battery bar, with a housing in which a control slide is arranged, which controls the connection between an inlet connection, at least one consumer connection and at least one ventilation connection, with a between the ventilation connection and the consumer connection Throttle check valve is arranged.

Bei Wegeventilen der vorgenannten Art, insbesondere wenn sie auf Batterieleisten mit gemeinsamer Entlüftung aufgebaut sind, muß verhindert werden, daß beim Auftreten von Staudrücken in den Entlüftungsleitungen diese Staudrücke zu einer ungewollten Beaufschlagung des oder der Verbraucher, z. B. zu ungewollten Zylinderbewegungen führen. Es ist deshalb notwendig, ein Rückströmen der Druckluft von der gemeinsamen Entlüftung zu den Verbraucheranschlüssen zu verhindern. Solche Rückstromverhinderer werden gegenwärtig in Form einer Zwischenplatte mit Rückschlagventil zwischen Ventilblock und Batterieleiste ausgeführt. Diese Anordnungen bauen jedoch groß und sind kostenintensiv.In directional control valves of the aforementioned type, especially if they are built on battery strips with common ventilation, it must be prevented that, when backpressures occur in the ventilation lines, these back pressures lead to undesired exposure of the consumer or consumers, e.g. B. lead to unwanted cylinder movements. It is therefore necessary to prevent the compressed air from flowing back from the common vent to the consumer connections. Such backflow preventers are currently in the form of an intermediate plate with a check valve between the valve block and the battery bar. However, these arrangements are large and expensive.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Wegeventil der eingangs genannten Art bei einfacher, kompakter und raumsparender Bauweise mit einem Drosselrückschlagventil (bzw. der erforderlichen Anzahl von Drosselrückschlagventilen) auszurüsten.The invention is therefore based on the object of equipping a directional control valve of the type mentioned at the outset in a simple, compact and space-saving design with a throttle check valve (or the required number of throttle check valves).

Nach der Erfindung wird dies dadurch erreicht, daß das Drosselrückschlagventil direkt im Gehäuse des Wegeventiles quer zur Längsachse des Steuerschiebers eingebaut ist.
Bei mehreren Verbraucheranschlüssen ist hierbei für jeden Verbraucheranschluß ein solches Drosselrückschlagventil vorgesehen.
Vorteilhafterweise bestehen das Drosselelement und das Rückschlagelement des Drosselrückschlagventiles aus einem einzigen Formstück, das insbesondere aus einem flexiblen, elastischen Kunststoffmaterial gebildet ist.
Vorteilhafterweise ist das Formstück auf dem Schaft einer Stellschraube befestigt, durch welche der Durchflußquerschnitt zwischen dem Gehäuse des Wegeventiles und dem Formstück veränderbar ist.
Zweckmäßigerweise ist hierbei im Gehäuse eine Stufenbohrung ausgebildet, deren eine Stufe zusammen mit dem Formstück das Drosselelement und deren andere Stufe zusammen mit dem Formstück das Rückschlagelement bildet.According to the invention, this is achieved in that the throttle check valve is installed directly in the housing of the directional valve transversely to the longitudinal axis of the control slide.
In the case of several consumer connections, such a throttle check valve is provided for each consumer connection.
Advantageously, the throttle element and the check element of the throttle check valve consist of a single shaped piece, which is formed in particular from a flexible, elastic plastic material.
The fitting is advantageously fastened on the shaft of an adjusting screw, by means of which the flow cross section between the housing of the directional control valve and the fitting can be changed.
A step bore is expediently formed in the housing, one step of which together with the shaped piece forms the throttle element and the other step together with the shaped piece forms the check element.

Die Stellschraube ist zweckmäßigerweise von außen zugänglich, so daß der Drosselquerschnitt des Drosselrückschlagventiles auch bei montiertem Zustand des Wegeventiles auf der Batterieleiste verändert werden kann.
Durch die Befestigung des Formstückes auf dem Schaft der Stellschraube ist die letztere gegen Herausdrehen gesichert.The adjusting screw is expediently accessible from the outside, so that the throttle cross section of the throttle check valve can be changed even when the directional control valve is mounted on the battery strip.
By fastening the fitting on the shaft of the set screw, the latter is secured against unscrewing.

Eine beispielsweise Ausführungsform der Erfindung wird nachfolgend anhand der Zeichnung erläutert, in der

Figur 1
in Draufsicht zwei auf einer Batterieleiste montierte Wegeventile zeigt.
Figur 2
zeigt einen Querschnitt durch eines der Wegeventile nach Figur 1.
Figur 3
zeigt einen Schnitt längs der Linie III-III von Figur 2.
An example embodiment of the invention is explained below with reference to the drawing, in which
Figure 1
shows a top view of two directional valves mounted on a battery bar.
Figure 2
shows a cross section through one of the directional control valves according to FIG. 1.
Figure 3
shows a section along the line III-III of Figure 2.

Figur 1 zeigt in Draufsicht schematisch zwei Wegeventile 10, die nebeneinander auf einer gemeinsamen Anschlußplatte oder Batterieleiste 12 montiert sind. Bei einer solchen Bauform sind alle Wegeventile 10 an eine gemeinsame Zulaufleitung und an gemeinsame Entlüftungsleitungen angeschlossen.Figure 1 shows a top view schematically shows two directional control valves 10 which are mounted side by side on a common connecting plate or battery strip 12. With such a design, all directional control valves 10 are connected to a common inlet line and to common ventilation lines.

Figur 2 zeigt einen Querschnitt durch eines der Wegeventile 10 nach Figur 1.
Das Wegeventil 10 nach Figur 2 ist auf einer Batterieleiste 12 montiert, durch welches sich eine Zulaufleitung 72 und zwei Entlüftungsleitungen 74, 76 erstrecken, die für alle Wegeventile 10 gemeinsam sind.
In einer Bohrung im Gehäuse 48 ist ein Steuerschieber 14 zusammen mit einem zugehörigen Dichtungssatz 16 eingebaut. Der Steuerschieber 14 ist an jedem seiner beiden axialen Enden mit einem Arbeitskolben 44 bzw. 46 verbunden, welch letztere über Arbeitsanschlüsse 40, 42 mit Druckluft beaufschlagt werden können, wodurch der Steuerschieber 14 in die gewünschte Position geschaltet wird.
Die Arbeitsweise des hier dargestellten Wegeventiles ist jedoch bekannt und wird daher nicht näher beschrieben.FIG. 2 shows a cross section through one of the directional control valves 10 according to FIG. 1.
The directional control valve 10 according to FIG. 2 is mounted on a battery strip 12, through which an inlet line 72 and two ventilation lines 74, 76 extend, which are common to all directional control valves 10.
In a bore in the housing 48, a control slide 14 is installed together with an associated seal set 16. The control slide 14 is connected at each of its two axial ends to a working piston 44 and 46, the latter of which can be pressurized with compressed air via working connections 40, 42, whereby the control slide 14 is switched to the desired position.
However, the operation of the directional control valve shown here is known and is therefore not described in detail.

Im Gehäuse 48 ist ein Zulaufanschluß 18 ausgebildet (der an die Zulaufleitung 72 angeschlossen ist), ferner zwei Verbraucheranschlüsse 24, 26 (die an zwei nicht näher bezeichnete Verbraucher angeschlossen sind), sowie zwei Entlüftungsanschlüsse 32, 34 (die entsprechend an die Entlüftungsleitungen 74, 76 angeschlossen sind).An inlet connection 18 (which is connected to the inlet line 72) is formed in the housing 48, furthermore two consumer connections 24, 26 (the one to two consumers, which are not specified in any more detail) are connected), and two ventilation connections 32, 34 (which are connected to the ventilation lines 74, 76, respectively).

Der Zulaufanschluß 18 mündet in eine Zulaufkammer 22, die Verbraucheranschlüsse 24, 26 münden entsprechend in Verbraucherkammern 28, 30 und die Entlüftungsanschlüsse 32, 34 münden entsprechend in Entlüftungskammern 36, 38. Die Zulaufkammer 22, die Verbraucherkammern 28 und 30, sowie die Entlüftungskammern 36 und 38 sind Teile der Bohrung, in welcher der Steuerschieber 14 axial beweglich angeordnet ist.The inlet connection 18 opens into an inlet chamber 22, the consumer connections 24, 26 open out correspondingly in consumer chambers 28, 30 and the ventilation connections 32, 34 open out accordingly in ventilation chambers 36, 38. The inlet chamber 22, the consumer chambers 28 and 30, and the ventilation chambers 36 and 38 are parts of the bore in which the control slide 14 is arranged to be axially movable.

Zwischen dem Verbraucheranschluß 24 und dem Entlüftungsanschluß 32 und ebenso zwischen dem Verbraucheranschluß 26 und dem Entlüftungsanschluß 34 ist jeweils ein Drosselrückschlagventil eingebaut, wobei in Figur 3 im Schnitt das Drosselrückschlagventil 50 zwischen dem Verbraucheranschluß 24 und dem Entlüftungsanschluß 32 dargestellt ist.
Das Drosselventil 50 ist im Bereich der Entlüftungskammer 36 angeordnet. Im Gehäuse 48 ist hierzu eine Bohrung 32 ausgebildet, deren Achse quer zur Längsachse des Steuerschiebers verläuft, und die mit der Entlüftungskammer 36 verbunden ist.
In ihrem - bezogen auf die Darstellung in Figur 3 - unteren Bereich ist die Bohrung 52 unter Bildung einer Schulter 54 erweitert zu einer Bohrung 56, deren Durchmesser größer ist als derjenige der Bohrung 52. Die Bohrung 56 steht in Verbindung mit dem Entlüftungsanschluß 32.A throttle check valve is installed between the consumer port 24 and the vent port 32 and also between the consumer port 26 and the vent port 34, the throttle check valve 50 between the consumer port 24 and the vent port 32 being shown in FIG.
The throttle valve 50 is arranged in the region of the ventilation chamber 36. For this purpose, a bore 32 is formed in the housing 48, the axis of which extends transversely to the longitudinal axis of the control slide, and which is connected to the ventilation chamber 36.
In its lower region, based on the illustration in FIG. 3, the bore 52 is expanded to form a shoulder 54 to form a bore 56, the diameter of which is larger than that of the bore 52. The bore 56 is connected to the vent connection 32.

Der in Figur 3 obere Bereich der Bohrung 52 ist als Gewindebohrung 58 ausgebildet, in welche eine Stellschraube 60 eingeschraubt ist, die von außen zugänglich und betätigbar ist. Die Stellschraube 60 hat einen Schaft 62 mit reduziertem Durchmesser, auf dessen in Figur 3 unteren Ende ein Formstück 64 befestigt, z. B. zwischen zwei nicht näher bezeichneten Bunden am Schaft 62 gehalten oder eingespannt ist. Das allgemein ringförmige Formstück 64 hat eine zentrale Bohrung und eine ringförmige Lippe 68, welche, wie dargestellt, an der Wand der Bohrung 56 anliegt. Das Formstück besteht zweckmäßigerweise aus einem flexiblen, elastischen Kunststoffmaterial, so daß es vom Ende des Schaftes 62 her über den äußeren Bund auf den Schaft aufgeschoben werden kann, bis es zwischen den beiden Bunden einrastet.
Zwischen dem Formstück 64 und der Schulter 54, das heißt der ringförmigen Kante zwischen den Bohrungen 52 und 56, ist ein Ringspalt 70 gebildet. Die Fläche dieses Ringspaltes, das heißt der Durchflußquerschnitt zwischen dem Gehäuse 48 und dem Formstück 64 kann durch die von außen zugängliche Stellschraube verändert und damit nach Bedarf eingestellt werden.The upper area of the bore 52 in FIG. 3 is designed as a threaded bore 58, into which an adjusting screw 60 is screwed, which is accessible and operable from the outside. The adjusting screw 60 has a shaft 62 with a reduced diameter, on the lower end of which in FIG. 3 a shaped piece 64 attached, e.g. B. is held or clamped between two unspecified collars on the shaft 62. The generally annular fitting 64 has a central bore and an annular lip 68 which, as shown, abuts the wall of the bore 56. The shaped part expediently consists of a flexible, elastic plastic material, so that it can be pushed onto the shaft from the end of the shaft 62 via the outer collar until it engages between the two collars.
An annular gap 70 is formed between the shaped piece 64 and the shoulder 54, that is to say the annular edge between the bores 52 and 56. The area of this annular gap, that is to say the flow cross section between the housing 48 and the shaped piece 64, can be changed by the adjusting screw which is accessible from the outside and can thus be adjusted as required.

Wenn im normalen Betrieb die Druckluft vom Verbraucheranschluß 24 über die Verbraucherkammer 28 und die Entlüftungskammer 36 zum Entlüftungsanschluß 32 rückströmt (wie in Figur 2 dargestellt ist), strömt die Luft zunächst durch den Ringspalt 70 in den Raum 66, der ein Teil der Bohrung 56 ist, worauf die Lippe 68 des Formstückes 64 von der Wand der Bohrung 56 abgehoben wird und den Durchgang zum Entlüftungsanschluß 32 freigibt.
Die Druckluft kann somit vom Verbraucheranschluß 24 zum Entlüftungsanschluß 32 rückströmen, wobei diese Rückströmung durch Veränderung des Drosselquerschnittes nach Bedarf gedrosselt werden kann.
Tritt nun aber in der Entlüftungsleitung 74 ein Staudruck auf, und versucht die Druckluft deshalb in umgekehrter Richtung durch das Drosselrückschlagventil zurück zu strömen, das heißt vom Entlüftungsanschluß 32 zum Verbraucheranschluß 24, so legt sich die Lippe 68 des Formstückes 64 an die Wand der Bohrung 56 an und sperrt das Durchströmen der Druckluft in dieser Richtung.
Eine ungewollte Beaufschlagung des an den Verbraucheranschluß 24 angeschlossenen Verbrauchers wird damit verhindert.
Das Formstück 64 bildet somit (in Verbindung mit dem Gehäuse 48) das Drosselelement und das Rückschlagelement des Drosselrückschlagventiles 50.
Infolge des Einbaus des Drosselrückschlagventiles 50 direkt in das Gehäuse 48 und quer zur Bohrung des Steuerschiebers 14 wird eine einfache, kompakte und raumsparende und damit auch kostengünstige Ausbildung und Anordnung des Drosselrückschlagventiles 50 im Wegeventil 10 erreicht.
Ein entsprechend ausgebildetes Drosselrückschlagventil ist, wie oben bereits erwähnt, auch zwischen dem Verbraucheranschluß 26 und dem Entlüftungsanschluß 34 eingebaut.If, in normal operation, the compressed air flows back from the consumer connection 24 via the consumer chamber 28 and the ventilation chamber 36 to the ventilation connection 32 (as shown in FIG. 2), the air first flows through the annular gap 70 into the space 66, which is part of the bore 56 , whereupon the lip 68 of the fitting 64 is lifted off the wall of the bore 56 and opens the passage to the vent connection 32.
The compressed air can thus flow back from the consumer connection 24 to the vent connection 32, this backflow being able to be throttled as required by changing the throttle cross section.
However, if a dynamic pressure occurs in the ventilation line 74 and the compressed air therefore tries to flow back through the throttle check valve in the opposite direction, i.e. from the ventilation connection 32 to the consumer connection 24, the lip 68 of the fitting 64 lies against the wall of the bore 56 and blocks the flow of compressed air in this direction.
An undesired exposure to the consumer connected to the consumer connection 24 is thus prevented.
The fitting 64 thus forms (in connection with the housing 48) the throttle element and the check element of the throttle check valve 50.
As a result of the installation of the throttle check valve 50 directly in the housing 48 and transversely to the bore of the control slide 14, a simple, compact and space-saving and thus also inexpensive design and arrangement of the throttle check valve 50 in the directional control valve 10 is achieved.
A correspondingly designed throttle check valve is, as already mentioned above, also installed between the consumer connection 26 and the ventilation connection 34.

Claims (7)

Wegeventil für Druckluft, das insbesondere auf einer Batterieleiste montiert ist, mit einem Gehäuse, in dem ein Steuerschieber angeordnet ist, der die Verbindung zwischen einem Zulaufanschluß, wenigstens einem Verbraucheranschluß und wenigstens einem Entlüftungsanschluß steuert, wobei zwischen dem Entlüftungsanschluß und dem Verbraucheranschluß ein Drosselrückschlagventil angeordnet ist, dadurch gekennzeichnet, daß das Drosselrückschlagventil (50) direkt im Gehäuse (48) quer zur Längsachse des Steuerschiebers (14) eingebaut ist.Directional control valve for compressed air, which is mounted in particular on a battery bar, with a housing in which a control slide is arranged, which controls the connection between an inlet connection, at least one consumer connection and at least one ventilation connection, a throttle check valve being arranged between the ventilation connection and the consumer connection , characterized in that the throttle check valve (50) is installed directly in the housing (48) transversely to the longitudinal axis of the control slide (14). Wegeventil nach Anspruch 1, dadurch gekennzeichnet, daß das Drosselelement und das Rückschlagelement des Drosselrückschlagventiles (50) aus einem einzigen Formstück (64) gebildet ist.Directional control valve according to claim 1, characterized in that the throttle element and the check element of the throttle check valve (50) are formed from a single shaped piece (64). Wegeventil nach Anspruch 2, dadurch gekennzeichnet, daß das Formstück (64) aus einem flexiblen, elastischen Kunststoffmaterial besteht.Directional control valve according to claim 2, characterized in that the shaped piece (64) consists of a flexible, elastic plastic material. Wegeventil nach Anspruch 2, dadurch gekennzeichnet, daß im Gehäuse (48) eine Stufenbohrung (52, 56) ausgebildet ist, deren eine Stufe (52) zusammen mit dem Formstück (64) das Drosselelement und deren andere Stufe (56) zusammen mit dem Formstück (64) das Rückschlagelement bildet.Directional control valve according to Claim 2, characterized in that a stepped bore (52, 56) is formed in the housing (48), one step (52) together with the shaped piece (64), the throttle element and the other step (56) together with the shaped piece (64) forms the check element. Wegeventil nach Anspruch 2, dadurch gekennzeichnet, daß das Formstück (64) auf dem Schaft (62) einer Stellschraube (60) befestigt ist, durch welche der Durchflußquerschnitt zwischen Gehäuse (48) und Formstück (64) (Ringspalt 70) veränderbar ist.Directional control valve according to claim 2, characterized in that the shaped piece (64) is fastened on the shaft (62) of an adjusting screw (60), by means of which the flow cross section between the housing (48) and shaped piece (64) (annular gap 70) can be changed. Wegeventil nach Anspruch 5, dadurch gekennzeichnet, daß die Stellschraube (60) von außen zugänglich und betätigbar ist.Directional control valve according to claim 5, characterized in that the adjusting screw (60) is accessible and operable from the outside. Wegeventil nach Anspruch 5, dadurch gekennzeichnet, daß die Stellschraube (60) durch das mit ihr verbundene und an der Wand der Bohrung (56) anliegende Formstück (64) gegen Herausdrehen gesichert ist.Directional control valve according to claim 5, characterized in that the adjusting screw (60) is secured against being unscrewed by the fitting (64) connected to it and resting against the wall of the bore (56).
EP93114071A 1992-09-29 1993-09-02 Directional valve Expired - Lifetime EP0590339B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4232628 1992-09-29
DE4232628A DE4232628A1 (en) 1992-09-29 1992-09-29 Directional control valve

Publications (2)

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EP0590339A1 true EP0590339A1 (en) 1994-04-06
EP0590339B1 EP0590339B1 (en) 1996-11-13

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ID=6469135

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EP93114071A Expired - Lifetime EP0590339B1 (en) 1992-09-29 1993-09-02 Directional valve

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US (1) US5400821A (en)
EP (1) EP0590339B1 (en)
JP (1) JPH06213342A (en)
DE (2) DE4232628A1 (en)

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Publication number Priority date Publication date Assignee Title
DE29711130U1 (en) * 1997-06-26 1997-08-28 Festo Kg, 73734 Esslingen Multi-way valve
EP0838596A3 (en) * 1996-10-28 1999-05-12 Smc Corporation Pilot 3-port transfer valve
EP0840018A3 (en) * 1996-10-28 1999-05-12 Smc Corporation Pilot 5-port transfer valve
EP0887559A3 (en) * 1997-06-26 1999-05-19 FESTO AG & Co Multiway valve
EP2335904A1 (en) * 2009-12-21 2011-06-22 FESTO AG & Co. KG Valve

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IT1271510B (en) * 1993-10-06 1997-05-30 Luciano Migliori MULTIPLE SUB-BASE FOR AIR DISTRIBUTION WITH PNEUMATIC VALVES
FR2757599B1 (en) * 1996-12-23 1999-01-29 Ksb Sa TAP ACTUATOR IN WHICH THE BASE OF THE HOUSING IS CONFORMED TO PROVIDE THE FLUID DISTRIBUTION LINKS
DE19829530B4 (en) * 1998-07-02 2005-01-20 Hoerbiger Micro Fluid Gmbh valve assembly
CN105492808B (en) * 2013-07-05 2017-12-01 费斯托股份有限两合公司 Valve
EP2994675B1 (en) * 2013-07-05 2016-08-31 Festo AG & Co. KG Valve
CN103573733B (en) * 2013-11-05 2016-01-27 龙工（上海）精工液压有限公司 A kind of buffering pressure maintaining valve for oil hydraulic motor
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FR2324959A1 (en) * 1975-09-19 1977-04-15 Atlas Copco Ab ADJUSTABLE FLOW LIMITATION VALVE, ESPECIALLY TO CONTROL THE SPEED OF AN AIR MOTOR
FR2346582A1 (en) * 1976-04-02 1977-10-28 Bouteille Daniel PERFECTED DISTRIBUTION DEVICE FOR PNEUMATIC INSTALLATION
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0838596A3 (en) * 1996-10-28 1999-05-12 Smc Corporation Pilot 3-port transfer valve
EP0840018A3 (en) * 1996-10-28 1999-05-12 Smc Corporation Pilot 5-port transfer valve
US6109291A (en) * 1996-10-28 2000-08-29 Smc Corporation Pilot 5-port transfer valve
US6167901B1 (en) 1996-10-28 2001-01-02 Smc Corporation Pilot 3-port transfer valve
DE29711130U1 (en) * 1997-06-26 1997-08-28 Festo Kg, 73734 Esslingen Multi-way valve
EP0887559A3 (en) * 1997-06-26 1999-05-19 FESTO AG & Co Multiway valve
EP2335904A1 (en) * 2009-12-21 2011-06-22 FESTO AG & Co. KG Valve

Also Published As

Publication number Publication date
DE4232628A1 (en) 1994-03-31
US5400821A (en) 1995-03-28
DE59304467D1 (en) 1996-12-19
EP0590339B1 (en) 1996-11-13
JPH06213342A (en) 1994-08-02

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