EP1519054B1 - Pilot operated multiple-way valve - Google Patents

Pilot operated multiple-way valve Download PDF

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Publication number
EP1519054B1
EP1519054B1 EP20040019351 EP04019351A EP1519054B1 EP 1519054 B1 EP1519054 B1 EP 1519054B1 EP 20040019351 EP20040019351 EP 20040019351 EP 04019351 A EP04019351 A EP 04019351A EP 1519054 B1 EP1519054 B1 EP 1519054B1
Authority
EP
European Patent Office
Prior art keywords
valve
pilot
main part
housing main
housing
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.)
Not-in-force
Application number
EP20040019351
Other languages
German (de)
French (fr)
Other versions
EP1519054A3 (en
EP1519054A2 (en
Inventor
Grzegorz Bogdanowicz
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.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP1519054A2 publication Critical patent/EP1519054A2/en
Publication of EP1519054A3 publication Critical patent/EP1519054A3/en
Application granted granted Critical
Publication of EP1519054B1 publication Critical patent/EP1519054B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F15B13/0807—Manifolds
    • F15B13/0817—Multiblock 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
    • F15B13/04—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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot 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
    • F15B13/0832—Modular valves
    • F15B13/0839—Stacked plate type 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
    • F15B13/0846—Electrical details
    • F15B13/085—Electrical controllers
    • 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
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86582—Pilot-actuated
    • Y10T137/86614—Electric

Definitions

  • the invention relates to a pilot-operated multiway valve, comprising a main valve having a main valve housing and a valve holder arranged in the same elongated valve spool, wherein the valve spool controlling the connection between the laterally opening into the valve receiving valve channels control section and at least one end serving for controlled fluid loading Having at least the drive portion containing the control portion in a one-piece housing main body of the main valve body, and at least one combined with the main valve to a module pilot valve to control the fluid loading at least one drive portion of the valve spool having a an electrically actuable pilot member exhibiting Has a head piece mounted on a mounting interface equipped with a pilot valve seat, the including the associated pilot valve seat is an integral part of the housing main part of the main valve housing, to which the head of the relevant pilot valve is mounted directly.
  • a multi-way valve known from US-A-5 597 015 has a main valve with a main valve housing having a Having the control portion of the valve spool receiving one-piece housing main body and two attached to opposite end faces attached thereto lid parts.
  • a pilot valve is installed, which is composed of an attached to the lid part intermediate plate and attached to the intermediate plate head piece.
  • the intermediate plate defines a mounting interface and a pilot valve seat for a header of the pilot valve that attaches to the mounting interface and has an electromagnetically operable pilot member that cooperates with the valve seat to control the fluid loading of an end drive portion of the valve spool.
  • the main valve and the pilot valve are thus combined to form an assembly, which is composed of relatively many components, which requires a not inconsiderable expense for the production and installation of the multi-way valve.
  • a pressure relief valve which has a valve housing with frontally mounted control valves.
  • a bush-shaped valve insert In the interior of the valve housing, a bush-shaped valve insert is fixed, are formed on the valve seats, which cooperate with valve members, which are acted upon by the control valves.
  • the production of this pressure relief valve is relatively cumbersome.
  • the valve contains a manual override, which sits in a separate, attached to the housing main part lid part, which also carries the head piece.
  • the at least one pilot valve is equipped with an integrated into the housing main part manual override.
  • pilot-operated multi-way valve with increased degree of integration.
  • the headpiece of at least one pilot valve is seated directly on a mounting interface formed directly on the housing main part and provided with a pilot control valve seat.
  • Of particular advantage is such a design in a housing made of plastic material housing main part, since the possibility is created in the injection molding of the housing main body to form the mounting interface and the associated pilot valve seat directly in one piece.
  • the mounting interface and pilot valve seat are designed as part of the housing main body, this pilot valve is associated with a manual override, which is also integrated into the housing main body. It is for example possible to arrange an actuatable from the outside actuator of the manual override device in a recess of the housing main part.
  • the housing main part has an elongated shape.
  • at least one mounting interface with the associated pilot valve seat can be located on a longitudinal side of the housing main part, wherein this longitudinal side represents the upper side of the valve during later intended use of the multiway valve.
  • this longitudinal side represents the upper side of the valve during later intended use of the multiway valve.
  • This latter variant is particularly advantageous when the slide receptacle is sealed at the mounting interface having the end face by a one-piece housing main part formed end wall portion, the slide receptacle on this end so practically ends in a kind of blind hole in the interior of the housing main body. In this way, the entire outer stands End face of the housing main part for mounting the head piece of the relevant pilot valve available.
  • the invention can be implemented both with multi-way valves with only one pilot valve and in embodiments with two pilot valves. In the latter case, it is possible to combine the two pilot valves to a pilot unit having a header with two pilot members, which is mounted on a mounting interface of the housing main body, which is equipped with two integrated valve seats.
  • the at least one electrically actuable pilot valve is in particular a solenoid valve.
  • a solenoid valve for example, a solenoid valve.
  • other designs are possible, for example in the form of a piezo valve.
  • FIGURE shows, partially in longitudinal section, a preferred embodiment of the pilot-operated multi-way valve according to the invention, dash-dotted expedient variants being indicated schematically.
  • the figure shows a generally designated by reference numeral 1 pilot-operated multi-way valve, for example as a component of a valve assembly, which also has at least one preferred plate-like fluid distributor 2, on which the multi-way valve 1 - by means of suitable fastening means 3 - releasably secured.
  • the multi-way valve 1 is used to control fluid flows, wherein it is in the medium to be controlled in particular to Compressed air acts. In principle, however, it may also be another gaseous or hydraulic fluid.
  • the multi-way valve 1 has a main valve 4, which is combined with at least one and in the embodiment with two pilot valves 5a, 5b to form an assembly.
  • the pilot valves 5a, 5b are used for the controlled fluid admission of an elongated valve spool 6 of the main valve 4 in order to shift it linearly and to position it as desired.
  • pilot valves 5a, 5b are electrically actuated types and executed in the embodiment as solenoid valves. In principle, however, other valve types would be used as pilot valves, such as piezo valves.
  • the main valve 4 has a main valve housing 7 with an elongate, one-piece housing main part 8, in which a longitudinally extending slide receptacle 12 is formed which receives at least the most of the length of the valve spool 6 engaging control section 13 of the valve spool 6.
  • This control section 13 serves to control the connection between laterally opening into the slide receiving valve channels 14 by fluidly connecting these valve channels 14 in a predetermined pattern depending on the position or separated from each other. If the valve slide is designed as a spool valve as in the exemplary embodiment, its control section 13 contains several axially alternately successively arranged longitudinal sections of larger and smaller diameter.
  • housing-fixed, annular sealing means 15, which are arranged axially spaced in the slide holder 12 and subdivide the latter into a plurality of longitudinal sections which are each connected to one of the valve channels 14. If the control section 13 with a larger diameter length section immerses concentrically in a sealing means 15, it is enclosed by the latter under sealing, so that the longitudinal sections of the slider receptacle 12 located on both sides of the sealing means 15 are separated from one another. On the other hand, if a smaller-diameter length portion of the control section 13 comes to lie within a sealant 15, there is an annular overflow portion therebetween which allows the fluid to overflow between the adjacent lengths of the slider seat 12 and the valve passages connected thereto.
  • the valve spool 6 is equipped in the region of its two axial ends with a drive section 16a, 16b which enables a controlled fluid admission.
  • Each drive section 16a, 16b has for this purpose an end face 17 which can be acted upon by the fluid.
  • both drive sections 16a, 16b are integrally connected to the control section 13, wherein the entire valve slide 6 as a whole is a one-piece structure.
  • the diameter of the drive sections 16a, 16b corresponds to the diameter of the longitudinal sections of larger diameter of the control section 13. Indeed, it would be readily possible to design the drive sections 16a, 16b as separate components with respect to the control section 13. Furthermore, it is possible to design the drive sections 16a, 16b piston-like with an outer diameter which is greater than that of the longitudinal sections of larger diameter of the control section 13.
  • the fluid loading of the drive sections 16a, 16b is controlled in each case by one of the two pilot valves 5a, 5b.
  • the valve slide 6 can be displaced in opposite directions of its longitudinal axis and positioned as needed.
  • the multiway valve 1 has a 4/2 valve functionality.
  • valve channels 14 are, inter alia, a feed channel 14a, which is flanked axially on both sides by a respective venting channel 14b, 14c. These channels communicate with fluid distribution channels 18 extending in the fluid distributor 2, via which the pressure medium is supplied and removed.
  • the two ventilation channels 14b, 14c are connected to one another within the housing main part 8 so that they communicate together with a single fluid distribution channel 18.
  • Two further valve channels 14 are formed as working channels 14d, 14e and lead, for example, to the fluid distributor 2 opposite top of the housing main body 8 from. There they are provided with connection means 22 which allow the particular releasable connection of fluid lines leading to a consumer to be operated, for example, to a activatable by fluid force drive.
  • the main valve 4 is designed so that not only the control section 13 but also the drive sections 16a, 16b and thus the entire valve slide 6 lie within the one-piece housing main part 8.
  • the valve spool 6 protrudes with its end sections forming the drive sections 16a, 16b respectively into an end-side end section 23a, 23b of the slide receptacle 12, which is separated from the central region of the slide receptacle 12 by external sealing means 15 ', in which the control section 13 is located.
  • the slide holder 12 is sealed at a lying in the drawing right first end face by an end-side wall portion 24 of the housing main body 8.
  • the slide holder 12 is not limited by the housing main body 8 so that it is formed in the housing main body 8 in the manner of a blind hole.
  • Your longitudinal axis runs parallel to the longitudinal axis of the housing main part eighth
  • the slide receptacle 12 is closed by a separate cover part 25 of the main valve housing 7 with sealing and in particular detachably.
  • the cover part 25 can, as shown, dive a bit far axially into the housing main part 8.
  • first pilot valve 5a is partially formed in a unit with the housing main part 8 of the main valve housing 7.
  • the first pilot valve 5a includes a bottom portion 26a formed by the end portion of the housing main body 8 defining the end wall portion 24.
  • a mounting interface 27a having a pilot valve seat 28a integrally formed with the case main body 8. The latter is expediently housed a little way sunk within the housing main body 8.
  • the first pilot valve 5a has a head piece 32, which has a movable pilot control element 33, which protrudes a little way from the housing of the head piece 32, which is referred to below as the pilot control housing 34.
  • the pilot member 32 is formed in the embodiment of a movable armature 35 or coupled thereto in motion, the at least one in the Pre-control housing 34 is arranged associated with solenoid coil 36, which is acted upon via externally accessible electrical contact means 37 with an excitation voltage.
  • the header 32 is mounted to the mounting interface 27a with the pilot housing 34 abutting directly against the face of the housing body 8 and the pilot member 33 occupying a position opposite the pilot valve seat 28a.
  • the attachment to the main valve housing 7 takes place for example by means of dash-dotted lines indicated fastening screws 38 or other fastening means.
  • the housing main body 8 is made of plastic material which may be reinforced by fibers or other elements as needed. It is produced by casting, in particular by injection molding. In this manufacture, the pilot valve seat 28 a can be directly manufactured as an integral part of the housing main body 8. However, such a one-piece construction of the housing main part 8 and the pilot valve seat 28a is readily possible even with a metallic construction.
  • the pilot valve seat 28a defines the mouth of a pilot feed channel 42a, which brings the required for the actuation of the valve spool 6 pressure medium. In the embodiment, it branches off for this purpose within the housing main part 8 from the feed channel 14a.
  • the pilot valve seat 28a is located in a valve chamber 43a defined by an end recess of the housing main part 8, into which the pilot control member 33 protrudes. From it goes from a pilot control working channel 44a, which passes through the wall of the housing main part 8 and opens into the first end-side end portion 23a of the slide holder 12.
  • a pilot-venting channel 45a is still provided, which - in particular on the pilot member 33 past - the valve chamber 43a connects to the environment, wherein it has a the rear of the pilot member 33 opposite vent valve seat 46a.
  • the first pilot valve 5a can be operated with a 3/2-valve function.
  • the pilot control member 33 is under the action of a schematically indicated spring 47 on the pilot valve seat 28a and blocks the pilot control feed passage 42a.
  • the front end portion 23a is vented to the atmosphere via the pilot working passage 44a and the pilot vent passage 45a.
  • the valve slide 6 can thus be moved in the drawing to the right in the first switching position shown below the center line.
  • the first pilot valve 5a is activated by applying an excitation voltage, so that the pilot member 33 from the pilot valve seat 28a lifts and at the same time comes to the vent valve seat 46a to the plant.
  • pressure medium from the pilot feed channel 42a via the Vorsteüer working channel 44a in the adjacent front end portion 23a of the slide holder 12 to flow and the first drive portion 16a act on a compressive force.
  • the second pilot valve 5b associated with the second end face of the slide holder 12 has, with one exception, the same structure as the first pilot valve 5a.
  • the reference numbers have been replaced by the letter "a” instead of the letter "a”.
  • the functional description for the first pilot valve 5a with respect to the second pilot valve 5b applies accordingly.
  • the essential difference between the two pilot valves 5a, 5b is that in the second pilot valve 5b the bottom part 26b is not an integral part of the housing main part 8, but is formed by the cover part 25 which is separate from the housing main part 8. Consequently, in the case of the second pilot valve 5b, the mounting interface 27b and the pilot valve seat 28b are also located on the cover part 25.
  • the functioning of the two pilot valves 5a, 5b is identical, so that the valve slide 6 by coordinated loading and venting of the end-side end portions 23a, 23b of the slide receptacle 12 can be moved either in one or the other direction.
  • the first pilot valve 5a is designed and arranged such that its pilot valve seat 28a comes to lie in the axial extension of the slide holder 12.
  • Such a design is readily possible if the slide holder 12 is closed at the first end side directly by the housing main part 8.
  • this cover then has no function with respect to the first pilot valve 5a.
  • dash-dotted lines at 48 indicate that at least one pilot valve 48 can also be placed longitudinally on the main valve 4 if necessary, in particular on the upper side of the main valve housing 7.
  • a mounting interface 27c and at least one associated one are therefore provided Pilot valve seat 28 c arranged as an integral part of the housing main part 8 on the longitudinal side and with a head piece 32nd of the respective pilot valve 48 equipped.
  • pilot valve seat 28 c arranged as an integral part of the housing main part 8 on the longitudinal side and with a head piece 32nd of the respective pilot valve 48 equipped.
  • one or two pilot valves can be provided in a corresponding manner alongside the housing main part 8.
  • the multi-way valve 1 has two pilot valves, it is also possible to combine them into a pilot unit, as indicated by dash-dotted lines in the drawing at 52.
  • a mounting interface 27d provided on the housing main part 8 is simultaneously associated with two pilot valve seats 28d which are integrated into the housing main part 8, wherein the attached headpiece 32 of the pilot control unit 52 contains two pilot control members 33 each associated with one of the pilot valve seats 28d.
  • first and second pilot valves 5a, 5b are each additionally equipped with a manual override device 53a, 53b. This is in each case integrated in the associated bottom part 26a, 26b.
  • the manual override device 53a being installed in the housing main body 8 and thus being in the same component which also forms the mounting interface 27a and the pilot valve seat 28a of the associated first pilot valve 5a.
  • the manual override device 53b is expediently located in the cover part 25.
  • the manual override 53a, 53b may have a preferably plunger-like actuator 54 which is slidably disposed in a recess 55 of the bottom portion 26a, 26b oriented transversely to the longitudinal direction of the pilot member 33, the recess 55 being at one end towards the outside of the bottom portion 26 and at the other end opens into the valve chamber 43.
  • the actuator 54 has a preferably designed as an inclined surface Beaufschlagungspartie 56 which engages under the pilot valve 33 and the associated pilot valve seat 28a, 28b lifts when the actuator 54 is displaced in the direction of the pilot member 33.
  • the displacement of the actuator 54 can be caused manually.
  • the actuator 54 has a rear side accessible from the outside operating part 57th

Abstract

The piloted multi-way valve has a primary valve (4), with a spool with a control section (13) and a drive section (16a,16b), and a pilot valve (5a,5b) which has a headpiece (32), mounted on an assembly interface (27a,27b) equipped with a pilot valve seat (28a,28c,28d), and an electrically operated piloting component (33). At least one interface, including the associated pilot valve seat, is an integral component part of the main component (8) of the primary valve housing (7) and to which is directly attached the headpiece of the corresponding pilot valve.

Description

Die Erfindung betrifft ein vorgesteuertes Mehrwegeventil, mit einem Hauptventil, das ein Hauptventilgehäuse und einen in einer Schieberaufnahme desselben angeordneten länglichen Ventilschieber aufweist, wobei der Ventilschieber einen die Verbindung zwischen seitlich in die Schieberaufnahme einmündenden Ventilkanälen steuernden Steuerabschnitt und an wenigstens einem Ende einen zur gesteuerten Fluidbeaufschlagung dienenden Antriebsabschnitt aufweist, wobei sich zumindest der den Steuerabschnitt enthaltende Bestandteil der Schieberaufnahme in einem einstückigen Gehäusehauptteil des Hauptventilgehäuses befindet, und mit mindestens einem mit dem Hauptventil zu einer Baugruppe zusammengefassten Vorsteuerventil zur Steuerung der Fluidbeaufschlagung mindestens eines Antriebsabschnittes des Ventilschiebers, das ein ein elektrisch betätigbares Vorsteuerglied aufweisendes Kopfstück besitzt, das an einer mit einem Vorsteuerventilsitz ausgestatteten Montageschnittstelle montiert ist, die einschließlich des zugehörigen Vorsteuerventilsitzes ein integraler Bestandteil des Gehäusehauptteils des Hauptventilgehäuses ist, an das das Kopfstück des betreffenden Vorsteuerventils direkt angebaut ist.The invention relates to a pilot-operated multiway valve, comprising a main valve having a main valve housing and a valve holder arranged in the same elongated valve spool, wherein the valve spool controlling the connection between the laterally opening into the valve receiving valve channels control section and at least one end serving for controlled fluid loading Having at least the drive portion containing the control portion in a one-piece housing main body of the main valve body, and at least one combined with the main valve to a module pilot valve to control the fluid loading at least one drive portion of the valve spool having a an electrically actuable pilot member exhibiting Has a head piece mounted on a mounting interface equipped with a pilot valve seat, the including the associated pilot valve seat is an integral part of the housing main part of the main valve housing, to which the head of the relevant pilot valve is mounted directly.

Ein aus der US-A-5 597 015 bekanntes Mehrwegeventil verfügt über ein Hauptventil mit einem Hauptventilgehäuse, das ein den Steuerabschnitt des Ventilschiebers aufnehmendes einstückiges Gehäusehauptteil und zwei an entgegengesetzten Stirnseiten daran befestigte Deckelteile aufweist. An einem dieser Deckelteile ist ein Vorsteuerventil installiert, das sich aus einer an dem Deckelteil angebrachten Zwischenplatte und einem an der Zwischenplatte befestigten Kopfstück zusammensetzt. Die Zwischenplatte definiert eine Montageschnittstelle und einen Vorsteuerventilsitz für ein Kopfstück des Vorsteuerventils, das sich an die Montageschnittstelle ansetzen lässt und ein elektromagnetisch betätigbares Vorsteuerglied aufweist, das mit dem Ventilsitz zusammenarbeitet, um die Fluidbeaufschlagung eines endseitigen Antriebsabschnittes des Ventilschiebers zu steuern. Das Hauptventil und das Vorsteuerventil sind somit zu einer Baugruppe zusammengefasst, die sich aus verhältnismäßig vielen Komponenten zusammensetzt, was einen nicht unbeträchtlichen Aufwand für die Herstellung und Montage des Mehrwegeventils bedingt.A multi-way valve known from US-A-5 597 015 has a main valve with a main valve housing having a Having the control portion of the valve spool receiving one-piece housing main body and two attached to opposite end faces attached thereto lid parts. On one of these cover parts, a pilot valve is installed, which is composed of an attached to the lid part intermediate plate and attached to the intermediate plate head piece. The intermediate plate defines a mounting interface and a pilot valve seat for a header of the pilot valve that attaches to the mounting interface and has an electromagnetically operable pilot member that cooperates with the valve seat to control the fluid loading of an end drive portion of the valve spool. The main valve and the pilot valve are thus combined to form an assembly, which is composed of relatively many components, which requires a not inconsiderable expense for the production and installation of the multi-way valve.

Aus der DE 41 10 926 C2 geht ein Druckbegrenzungsventil hervor, das ein Ventilgehäuse mit stirnseitig angebauten Steuerventilen aufweist. Im Innern des Ventilgehäuses ist ein buchsenförmiger Ventileinsatz befestigt, an dem Ventilsitze ausgebildet sind, die mit Ventilgliedern zusammenwirken, welche von den Steuerventilen beaufschlagt werden. Auch die Herstellung dieses Druckbegrenzungsventils ist relativ umständlich.From DE 41 10 926 C2, a pressure relief valve is apparent which has a valve housing with frontally mounted control valves. In the interior of the valve housing, a bush-shaped valve insert is fixed, are formed on the valve seats, which cooperate with valve members, which are acted upon by the control valves. The production of this pressure relief valve is relatively cumbersome.

In der DE 198 24 664 A1 wurde bereits ein Mehrwegeventil der eingangs genannten Art vorgeschlagen, bei dem das Vorsteuerventil teilweise in das einstückige Gehäusehauptteil integriert ist, indem an dem Gehäusehauptteil selbst die Montageschnittstelle einschließlich Vorsteuerventilsitz vorgesehen ist und das Kopfstück des Vorsteuerventils dort direkt an das Gehäusehauptteil angebaut ist.In DE 198 24 664 A1, a multi-way valve of the type mentioned has already been proposed, in which the pilot valve is partially integrated into the one-piece housing main body by the mounting interface including pilot valve seat is provided on the housing main part itself and the head of the pilot valve there directly to the housing main body is grown.

Einen ähnlichen Aufbau zeigt die US 6,192,937 B1, wobei allerdings der Vorsteuerventilsitz getrennt von der Montageschnittstelle innerhalb des Gehäusehauptteils untergebracht ist. Es besteht jedoch die zusätzliche Möglichkeit einer manuellen Betätigung mittels eines im Kopfstück angeordneten Betätigungsknopfes.A similar structure is shown in US 6,192,937 B1, wherein, however, the pilot valve seat is housed separately from the mounting interface within the housing main body. However, there is the additional possibility of manual operation by means arranged in the headpiece actuator button.

Eine Möglichkeit zur bei Bedarf manuellen Aktivierung des Vorsteuerventils beschreibt auch die DE 38 42 633 A1. Das Ventil enthält eine Handhilfsbetätigungseinrichtung, die in einem separaten, am Gehäusehauptteil angebrachten Deckelteil sitzt, das gleichzeitig auch das Kopfstück trägt.One way to manual activation of the pilot valve, if necessary, also describes the DE 38 42 633 A1. The valve contains a manual override, which sits in a separate, attached to the housing main part lid part, which also carries the head piece.

Es ist die Aufgabe der vorliegenden Erfindung, ein vorgesteuertes Mehrwegeventil zu schaffen, das sich einfacher und kostengünstiger herstellen lässt.It is the object of the present invention to provide a pilot-operated multi-way valve which can be manufactured more simply and less expensively.

Zur Lösung dieser Aufgabe ist vorgesehen, dass das mindestens eine Vorsteuerventil mit einer in das Gehäusehauptteil integrierten Handhilfsbetätigungseinrichtung ausgestattet ist.To achieve this object, it is provided that the at least one pilot valve is equipped with an integrated into the housing main part manual override.

Auf diese Weise ergibt sich ein vorgesteuertes Mehrwegeventil mit erhöhtem Integrationsgrad. Das Kopfstück mindestens eines Vorsteuerventils sitzt direkt an einer unmittelbar an dem Gehäusehauptteil ausgebildeten, mit einem Vorsteuerventilsitz versehenen Montageschnittstelle. Man erspart sich auf diese Weise eine umständliche Montage einer Vielzahl gesonderter Teile und kann auch die Herstellungskosten reduzieren, weil der Vorsteuerventilsitz unmittelbar bei der Produktion des Gehäusehauptteils realisiert werden kann. Von besonderem Vorteil ist eine solche Bauform bei einem aus Kunststoffmaterial bestehenden Gehäusehauptteil, da hier die Möglichkeit geschaffen ist, bei der Spritzgießherstellung des Gehäusehauptteils die Montageschnittstelle und den zugehörigen Vorsteuerventilsitz direkt einstückig anzuformen.In this way, there is a pilot-operated multi-way valve with increased degree of integration. The headpiece of at least one pilot valve is seated directly on a mounting interface formed directly on the housing main part and provided with a pilot control valve seat. This saves a cumbersome assembly of a plurality of separate parts and can also reduce the manufacturing costs, because the pilot valve seat can be realized directly in the production of the housing main body. Of particular advantage is such a design in a housing made of plastic material housing main part, since the possibility is created in the injection molding of the housing main body to form the mounting interface and the associated pilot valve seat directly in one piece.

Um bei Bedarf eine von der Stromversorgung unabhängige manuelle Betätigung mindestens eines Vorsteuerventils vornehmen zu können, dessen Montageschnittstelle und Vorsteuerventilsitz als Bestandteil des Gehäusehauptteils ausgeführt sind, ist diesem Vorsteuerventil eine Handhilfsbetätigungseinrichtung zugeordnet, die ebenfalls in das Gehäusehauptteil integriert ist. Es ist beispielsweise möglich, ein von außen her betätigbares Stellglied der Handhilfsbetätigungseinrichtung in einer Ausnehmung des Gehäusehauptteils anzuordnen.In order to be able to make independent of the power supply manual actuation of at least one pilot valve when needed, the mounting interface and pilot valve seat are designed as part of the housing main body, this pilot valve is associated with a manual override, which is also integrated into the housing main body. It is for example possible to arrange an actuatable from the outside actuator of the manual override device in a recess of the housing main part.

Vorteilhafte Weiterbildungen der Erfindung gehen aus den Unteransprüchen hervor.Advantageous developments of the invention will become apparent from the dependent claims.

In aller Regel hat das Gehäusehauptteil eine längliche Gestalt. Dabei kann sich mindestens eine Montageschnittstelle mit dem zugehörigen Vorsteuerventilsitz an einer Längsseite des Gehäusehauptteils befinden, wobei diese Längsseite beim späteren bestimmungsgemäßen Einsatz des Mehrwegeventils insbesondere die Oberseite des Ventils darstellt. Um eine schlanke Bauweise zu erhalten, verbunden mit einer geringen Bauhöhe, wird es jedoch in den meisten Fällen vorteilhafter sein, die Montageschnittstelle mit dem Vorsteuerventilsitz an einer Stirnseite des Gehäusehauptteils vorzusehen. Diese letztgenannte Variante ist vor allem dann vorteilhaft, wenn die Schieberaufnahme an der die Montageschnittstelle aufweisenden Stirnseite durch einen von dem einstückigen Gehäusehauptteil gebildeten stirnseitigen Wandabschnitt dicht verschlossen ist, die Schieberaufnahme an dieser Stirnseite also praktisch nach einer Art eines Sackloches im Innern des Gehäusehauptteils endet. Auf diese Weise steht die gesamte äu-ßere Stirnfläche des Gehäusehauptteils für die Montage des Kopfstückes des betreffenden Vorsteuerventils zur Verfügung.As a rule, the housing main part has an elongated shape. In this case, at least one mounting interface with the associated pilot valve seat can be located on a longitudinal side of the housing main part, wherein this longitudinal side represents the upper side of the valve during later intended use of the multiway valve. In order to obtain a slim design combined with a low overall height, however, it will in most cases be more advantageous to provide the mounting interface with the pilot valve seat on an end face of the housing main part. This latter variant is particularly advantageous when the slide receptacle is sealed at the mounting interface having the end face by a one-piece housing main part formed end wall portion, the slide receptacle on this end so practically ends in a kind of blind hole in the interior of the housing main body. In this way, the entire outer stands End face of the housing main part for mounting the head piece of the relevant pilot valve available.

Die Erfindung lässt sich sowohl bei Mehrwegeventilen mit nur einem Vorsteuerventil als auch bei Ausführungsformen mit zwei Vorsteuerventilen realisieren. Im letzteren Falle besteht die Möglichkeit, die beiden Vorsteuerventile zu einer Vorsteuereinheit zusammenzufassen, die ein Kopfstück mit zwei Vorsteuergliedern aufweist, das an einer Montageschnittstelle des Gehäusehauptteils montiert ist, die mit zwei integrierten Ventilsitzen ausgestattet ist.The invention can be implemented both with multi-way valves with only one pilot valve and in embodiments with two pilot valves. In the latter case, it is possible to combine the two pilot valves to a pilot unit having a header with two pilot members, which is mounted on a mounting interface of the housing main body, which is equipped with two integrated valve seats.

Bei dem mindestens einen elektrisch betätigbaren Vorsteuerventil handelt es sich insbesondere um ein Magnetventil. Es sind jedoch auch andere Bauformen möglich, beispielsweise in Form eines Piezoventils.The at least one electrically actuable pilot valve is in particular a solenoid valve. However, other designs are possible, for example in the form of a piezo valve.

Nachfolgend wird die Erfindung anhand der beiliegenden Zeichnung näher erläutert. Die einzige Figur zeigt, teilweise im Längsschnitt, eine bevorzugte Ausführungsform des erfindungsgemäßen vorgesteuerten Mehrwegeventils, wobei strichpunktiert zweckmäßige Varianten schematisch angedeutet sind.The invention will be explained in more detail with reference to the accompanying drawings. The single FIGURE shows, partially in longitudinal section, a preferred embodiment of the pilot-operated multi-way valve according to the invention, dash-dotted expedient variants being indicated schematically.

Die Figur zeigt ein insgesamt mit Bezugsziffer 1 bezeichnetes vorgesteuertes Mehrwegeventil, beispielhaft als Komponente einer Ventilanordnung, die darüber hinaus zumindest noch einen bevorzugt plattenartig ausgebildeten Fluidverteiler 2 aufweist, auf dem das Mehrwegeventil 1 - mittels geeigneten Befestigungsmitteln 3 - lösbar befestigt ist.The figure shows a generally designated by reference numeral 1 pilot-operated multi-way valve, for example as a component of a valve assembly, which also has at least one preferred plate-like fluid distributor 2, on which the multi-way valve 1 - by means of suitable fastening means 3 - releasably secured.

Das Mehrwegeventil 1 dient zur Steuerung von Fluidströmen, wobei es sich bei dem zu steuernden Medium insbesondere um Druckluft handelt. Prinzipiell kann es sich allerdings auch um ein sonstiges gasförmiges oder hydraulisches Fluid handeln.The multi-way valve 1 is used to control fluid flows, wherein it is in the medium to be controlled in particular to Compressed air acts. In principle, however, it may also be another gaseous or hydraulic fluid.

Das Mehrwegeventil 1 verfügt über ein Hauptventil 4, das mit mindestens einem und beim Ausführungsbeispiel mit zwei Vorsteuerventilen 5a, 5b zu einer Baugruppe zusammengefasst ist. Die Vorsteuerventile 5a, 5b dienen der gesteuerten Fluidbeaufschlagung eines länglichen Ventilschiebers 6 des Hauptventils 4, um diesen linear zu verlagern und wunschgemäß zu positionieren.The multi-way valve 1 has a main valve 4, which is combined with at least one and in the embodiment with two pilot valves 5a, 5b to form an assembly. The pilot valves 5a, 5b are used for the controlled fluid admission of an elongated valve spool 6 of the main valve 4 in order to shift it linearly and to position it as desired.

Die Vorsteuerventile 5a, 5b sind elektrisch betätigbare Bauarten und beim Ausführungsbeispiel als Magnetventile ausgeführt. Prinzipiell wären allerdings auch andere Ventilarten als Vorsteuerventile einsetzbar, beispielsweise Piezoventile.The pilot valves 5a, 5b are electrically actuated types and executed in the embodiment as solenoid valves. In principle, however, other valve types would be used as pilot valves, such as piezo valves.

Das Hauptventil 4 besitzt ein Hauptventilgehäuse 7 mit einem länglichen, einstückigen Gehäusehauptteil 8, in dem eine in Längsrichtung verlaufende Schieberaufnahme 12 ausgebildet ist, die wenigstens den den größten Teil der Länge des Ventilschiebers 6 einnehmenden Steuerabschnitt 13 des Ventilschiebers 6 aufnimmt. Dieser Steuerabschnitt 13 dient dazu, die Verbindung zwischen seitlich in die Schieberaufnahme einmündenden Ventilkanälen 14 zu steuern, indem er je nach Stellung diese Ventilkanäle 14 in einem vorgegebenen Muster fluidisch miteinander verbindet oder voneinander abtrennt. Ist der Ventilschieber wie beim Ausführungsbeispiel als Kolbenschieber ausgeführt, enthält sein Steuerabschnitt 13 mehrere axial abwechselnd aufeinanderfolgend angeordnete Längenabschnitte größeren und kleineren Durchmessers. Diese kooperieren mit gehäusefesten, ringförmigen Dichtungsmitteln 15, die axial beabstandet in der Schieberaufnahme 12 angeordnet sind und letztere in mehrere Längenabschnitte unterteilen, die jeweils mit einem der Ventilkanäle 14 verbunden sind. Taucht der Steuerabschnitt 13 mit einem Längenabschnitt größeren Durchmessers konzentrisch in ein Dichtungsmittel 15 ein, wird er von diesem unter Abdichtung umschlossen, sodass die beidseits des Dichtungsmittels 15 liegenden Längenabschnitte der Schieberaufnahme 12 voneinander abgetrennt sind. Kommt hingegen ein Längenabschnitt kleineren Durchmessers des Steuerabschnittes 13 innerhalb eines Dichtungsmittels 15 zu liegen, ergibt sich dazwischen ein ringförmiger Überströmabschnitt, der es dem Fluid ermöglicht, zwischen den benachbarten Längenabschnitten der Schieberaufnahme 12 und den mit diesen verbundenen Ventilkanälen überzuströmen.The main valve 4 has a main valve housing 7 with an elongate, one-piece housing main part 8, in which a longitudinally extending slide receptacle 12 is formed which receives at least the most of the length of the valve spool 6 engaging control section 13 of the valve spool 6. This control section 13 serves to control the connection between laterally opening into the slide receiving valve channels 14 by fluidly connecting these valve channels 14 in a predetermined pattern depending on the position or separated from each other. If the valve slide is designed as a spool valve as in the exemplary embodiment, its control section 13 contains several axially alternately successively arranged longitudinal sections of larger and smaller diameter. These cooperate with housing-fixed, annular sealing means 15, which are arranged axially spaced in the slide holder 12 and subdivide the latter into a plurality of longitudinal sections which are each connected to one of the valve channels 14. If the control section 13 with a larger diameter length section immerses concentrically in a sealing means 15, it is enclosed by the latter under sealing, so that the longitudinal sections of the slider receptacle 12 located on both sides of the sealing means 15 are separated from one another. On the other hand, if a smaller-diameter length portion of the control section 13 comes to lie within a sealant 15, there is an annular overflow portion therebetween which allows the fluid to overflow between the adjacent lengths of the slider seat 12 and the valve passages connected thereto.

Der Ventilschieber 6 ist im Bereich seiner beiden axialen Enden mit jeweils einem eine gesteuerte Fluidbeaufschlagung ermöglichenden Antriebsabschnitt 16a, 16b ausgestattet. Jeder Antriebsabschnitt 16a, 16b hat zu diesem Zweck eine von dem Fluid beaufschlagbare Stirnfläche 17. Beim Ausführungsbeispiel sind beide Antriebsabschnitte 16a, 16b einstückig mit dem Steuerabschnitt 13 verbunden, wobei der gesamte Ventilschieber 6 insgesamt ein einstückiges Gebilde ist. Es ist ferner vorgesehen, dass der Durchmesser der Antriebsabschnitte 16a, 16b dem Durchmesser der Längenabschnitte größeren Durchmessers des Steuerabschnittes 13 entspricht. Allerdings wäre es ohne weiteres möglich, die Antriebsabschnitte 16a, 16b als bezüglich dem Steuerabschnitt 13 gesonderte Komponenten auszuführen. Ferner besteht die Möglichkeit, die Antriebsabschnitte 16a, 16b kolbenartig zu gestalten mit einem Außendurchmesser der größer ist, als der derjenige der Längenabschnitte größeren Durchmessers des Steuerabschnittes 13.The valve spool 6 is equipped in the region of its two axial ends with a drive section 16a, 16b which enables a controlled fluid admission. Each drive section 16a, 16b has for this purpose an end face 17 which can be acted upon by the fluid. In the exemplary embodiment, both drive sections 16a, 16b are integrally connected to the control section 13, wherein the entire valve slide 6 as a whole is a one-piece structure. It is further provided that the diameter of the drive sections 16a, 16b corresponds to the diameter of the longitudinal sections of larger diameter of the control section 13. Indeed For example, it would be readily possible to design the drive sections 16a, 16b as separate components with respect to the control section 13. Furthermore, it is possible to design the drive sections 16a, 16b piston-like with an outer diameter which is greater than that of the longitudinal sections of larger diameter of the control section 13.

Die Fluidbeaufschlagung der Antriebsabschnitte 16a, 16b wird jeweils von einem der beiden Vorsteuerventile 5a, 5b gesteuert. Dadurch lässt sich der Ventilschieber 6 in entgegengesetzten Richtungen seiner Längsachse verlagern und nach Bedarf positionieren. Beim Ausführungsbeispiel hat das Mehrwegeventil 1 eine 4/2-Ventilfunktionalität.The fluid loading of the drive sections 16a, 16b is controlled in each case by one of the two pilot valves 5a, 5b. As a result, the valve slide 6 can be displaced in opposite directions of its longitudinal axis and positioned as needed. In the exemplary embodiment, the multiway valve 1 has a 4/2 valve functionality.

Es wäre möglich, das Mehrwegeventil 1 mit lediglich einem Vorsteuerventil 5a auszustatten, wenn durch andere Mittel, beispielsweise eine Federeinrichtung, eine Rückstellung des Ventilschiebers 6 in eine Grundstellung gewährleistet ist.It would be possible to equip the multi-way valve 1 with only one pilot valve 5a, if by other means, such as a spring device, a provision of the valve spool 6 is ensured in a basic position.

Bei den Ventilkanälen 14 handelt es sich unter anderem um einen Speisekanal 14a, der axial beidseits von jeweils einem Entlüftungskanal 14b, 14c flankiert ist. Diese Kanäle kommunizieren mit im Fluidverteiler 2 verlaufenden Fluidverteilerkanälen 18, über die das Druckmedium zugeführt und abgeführt wird. Beim Ausführungsbeispiel sind die beiden Entlüftungskanäle 14b, 14c innerhalb des Gehäusehauptteils 8 miteinander verbunden, sodass sie gemeinsam mit einem einzigen Fluidverteilerkanal 18 kommunizieren.The valve channels 14 are, inter alia, a feed channel 14a, which is flanked axially on both sides by a respective venting channel 14b, 14c. These channels communicate with fluid distribution channels 18 extending in the fluid distributor 2, via which the pressure medium is supplied and removed. In the exemplary embodiment, the two ventilation channels 14b, 14c are connected to one another within the housing main part 8 so that they communicate together with a single fluid distribution channel 18.

Zwei weitere Ventilkanäle 14 sind als Arbeitskanäle 14d, 14e ausgebildet und münden beispielsweise zu der dem Fluidverteiler 2 entgegengesetzten Oberseite des Gehäusehauptteils 8 aus. Dort sind sie mit Anschlussmitteln 22 versehen, die das insbesondere lösbare Anschließen von Fluidleitungen ermöglichen, die zu einem zu betätigenden Verbraucher führen, beispielsweise zu einem durch Fluidkraft aktivierbaren Antrieb.Two further valve channels 14 are formed as working channels 14d, 14e and lead, for example, to the fluid distributor 2 opposite top of the housing main body 8 from. There they are provided with connection means 22 which allow the particular releasable connection of fluid lines leading to a consumer to be operated, for example, to a activatable by fluid force drive.

Das Hauptventil 4 ist beim Ausführungsbeispiel so ausgeführt, dass nicht nur der Steuerabschnitt 13, sondern auch die Antriebsabschnitte 16a, 16b und somit der gesamte Ventilschieber 6 innerhalb des einstückigen Gehäusehauptteils 8 liegt. Der Ventilschieber 6 ragt mit seinen die Antriebsabschnitte 16a, 16b bildenden Endabschnitten jeweils in einen stirnseitigen Endabschnitt 23a, 23b der Schieberaufnahme 12 hinein, der durch äußere Dichtungsmittel 15' vom zentralen Bereich der Schieberaufnahme 12 abgetrennt ist, in dem sich der Steuerabschnitt 13 befindet.In the exemplary embodiment, the main valve 4 is designed so that not only the control section 13 but also the drive sections 16a, 16b and thus the entire valve slide 6 lie within the one-piece housing main part 8. The valve spool 6 protrudes with its end sections forming the drive sections 16a, 16b respectively into an end-side end section 23a, 23b of the slide receptacle 12, which is separated from the central region of the slide receptacle 12 by external sealing means 15 ', in which the control section 13 is located.

Beim Ausführungsbeispiel ist die Schieberaufnahme 12 an einer in der Zeichnung rechts liegenden ersten Stirnseite durch einen stirnseitigen Wandabschnitt 24 des Gehäusehauptteils 8 dicht verschlossen. Der stirnseitige Wandabschnitt 24 ist also einstückiger Bestandteil des die Schieberaufnahme 12 umfangsseitig umschließenden Gehäusehauptteils 8. An der entgegengesetzten zweiten Stirnseite des Gehäusehauptteils 8 hingegen ist die Schieberaufnahme 12 vom Gehäusehauptteil 8 nicht begrenzt, sodass sie insgesamt nach Art eines Sackloches in dem Gehäusehauptteil 8 ausgebildet ist. Ihre Längsachse verläuft parallel zur Längsachse des Gehäusehauptteils 8.In the embodiment, the slide holder 12 is sealed at a lying in the drawing right first end face by an end-side wall portion 24 of the housing main body 8. On the opposite second end face of the housing main part 8, however, the slide holder 12 is not limited by the housing main body 8 so that it is formed in the housing main body 8 in the manner of a blind hole. Your longitudinal axis runs parallel to the longitudinal axis of the housing main part eighth

An der zweiten Stirnseite ist die Schieberaufnahme 12 durch ein gesondertes Deckelteil 25 des Hauptventilgehäuses 7 unter Abdichtung und insbesondere lösbar verschlossen. Das Deckelteil 25 kann, wie abgebildet, ein Stück weit axial in das Gehäusehauptteil 8 eintauchen.At the second end face, the slide receptacle 12 is closed by a separate cover part 25 of the main valve housing 7 with sealing and in particular detachably. The cover part 25 can, as shown, dive a bit far axially into the housing main part 8.

Das im Bereich der ersten Stirnseite der Schieberaufnahme 12 angeordnete erste Vorsteuerventil 5a ist teilweise in Baueinheit mit dem Gehäusehauptteil 8 des Hauptventilgehäuses 7 ausgebildet. So enthält das erste Vorsteuerventil 5a ein Bodenteil 26a, das von dem den stirnseitigen Wandabschnitt 24 definierenden Endabschnitt des Gehäusehauptteils 8 gebildet ist. An diesem Bodenteil 26a, d.h. an der Stirnseite des Gehäusehauptteils 8, ist eine Montageschnittstelle 27a ausgebildet, die einen integral mit dem Gehäusehauptteil 8 ausgeführten Vorsteuerventilsitz 28a aufweist. Letzterer ist zweckmäßigerweise ein Stück weit versenkt innerhalb des Gehäusehauptteils 8 untergebracht.The arranged in the region of the first end face of the slider receptacle 12 first pilot valve 5a is partially formed in a unit with the housing main part 8 of the main valve housing 7. Thus, the first pilot valve 5a includes a bottom portion 26a formed by the end portion of the housing main body 8 defining the end wall portion 24. At this bottom part 26a, i. On the front side of the case main body 8, there is formed a mounting interface 27a having a pilot valve seat 28a integrally formed with the case main body 8. The latter is expediently housed a little way sunk within the housing main body 8.

Zusätzlich zu dem Bodenteil 26a verfügt das erste Vorsteuerventil 5a über ein Kopfstück 32, das ein bewegliches Vorsteuerglied 33 aufweist, das ein Stück weit aus dem im Folgenden als Vorsteuergehäuse 34 bezeichneten Gehäuse des Kopfstückes 32 herausragt. Das Vorsteuerglied 32 ist beim Ausführungsbeispiel von einem beweglichen Magnetanker 35 gebildet oder mit diesem bewegungsgekoppelt, dem mindestens eine im Vorsteuergehäuse 34 angeordnete Magnetspule 36 zugeordnet ist, die über von außen zugängliche elektrische Kontaktmittel 37 mit einer Erregerspannung beaufschlagbar ist.In addition to the bottom part 26a, the first pilot valve 5a has a head piece 32, which has a movable pilot control element 33, which protrudes a little way from the housing of the head piece 32, which is referred to below as the pilot control housing 34. The pilot member 32 is formed in the embodiment of a movable armature 35 or coupled thereto in motion, the at least one in the Pre-control housing 34 is arranged associated with solenoid coil 36, which is acted upon via externally accessible electrical contact means 37 with an excitation voltage.

Das Kopfstück 32 ist an der Montageschnittstelle 27a montiert, wobei das Vorsteuergehäuse 34 direkt an der Stirnseite des Gehäusehauptteils 8 anliegt und wobei das Vorsteuerglied 33 eine dem Vorsteuerventilsitz 28a gegenüberliegende Position einnimmt. Die Befestigung am Hauptventilgehäuse 7 erfolgt beispielsweise mittels strichpunktiert angedeuteten Befestigungsschrauben 38 oder anderen Befestigungsmitteln.The header 32 is mounted to the mounting interface 27a with the pilot housing 34 abutting directly against the face of the housing body 8 and the pilot member 33 occupying a position opposite the pilot valve seat 28a. The attachment to the main valve housing 7 takes place for example by means of dash-dotted lines indicated fastening screws 38 or other fastening means.

Beim Ausführungsbeispiels besteht das Gehäusehauptteil 8 aus Kunststoffmaterial, das bei Bedarf durch Fasern oder andere Elemente verstärkt sein kann. Es wird durch Gießen, insbesondere durch Spritzgießen hergestellt. Bei dieser Herstellung kann der Vorsteuerventilsitz 28a als einstückiger Bestandteil des Gehäusehauptteils 8 unmittelbar hergestellt werden. Eine solche Einstückigkeit von Gehäusehauptteil 8 und Vorsteuerventilsitz 28a ist allerdings auch bei einer metallischen Bauweise ohne weiteres möglich.In the embodiment, the housing main body 8 is made of plastic material which may be reinforced by fibers or other elements as needed. It is produced by casting, in particular by injection molding. In this manufacture, the pilot valve seat 28 a can be directly manufactured as an integral part of the housing main body 8. However, such a one-piece construction of the housing main part 8 and the pilot valve seat 28a is readily possible even with a metallic construction.

Der Vorsteuerventilsitz 28a umgrenzt die Mündung eines Vorsteuer-Speisekanals 42a, der das zur Betätigung des Ventilschiebers 6 erforderliche Druckmedium heranführt. Beim Ausführungsbeispiel zweigt er zu diesem Zweck innerhalb des Gehäusehauptteils 8 vom Speisekanal 14a ab.The pilot valve seat 28a defines the mouth of a pilot feed channel 42a, which brings the required for the actuation of the valve spool 6 pressure medium. In the embodiment, it branches off for this purpose within the housing main part 8 from the feed channel 14a.

Der Vorsteuerventilsitz 28a befindet sich in einer von einer stirnseitigen Vertiefung des Gehäusehauptteils 8 definierten Ventilkammer 43a, in die das Vorsteuerglied 33 hineinragt. Von ihr geht ein Vorsteuer-Arbeitskanal 44a ab, der die Wandung des Gehäusehauptteils 8 durchsetzt und in den ersten stirnseitigen Endabschnitt 23a der Schieberaufnahme 12 einmündet.The pilot valve seat 28a is located in a valve chamber 43a defined by an end recess of the housing main part 8, into which the pilot control member 33 protrudes. From it goes from a pilot control working channel 44a, which passes through the wall of the housing main part 8 and opens into the first end-side end portion 23a of the slide holder 12.

Schließlich ist noch ein Vorsteuer-Entlüftungskanal 45a vorgesehen, der - insbesondere am Vorsteuerglied 33 vorbei - die Ventilkammer 43a mit der Umgebung verbindet, wobei er einen der Rückseite des Vorsteuergliedes 33 gegenüber liegenden Entlüftungs-Ventilsitz 46a aufweist.Finally, a pilot-venting channel 45a is still provided, which - in particular on the pilot member 33 past - the valve chamber 43a connects to the environment, wherein it has a the rear of the pilot member 33 opposite vent valve seat 46a.

Somit kann das erste Vorsteuerventil 5a mit einer 3/2-Ventilfunktion betrieben werden. Im elektrisch deaktivierten Zustand liegt das Vorsteuerglied 33 unter der Wirkung einer schematisch angedeuteten Feder 47 am Vorsteuerventilsitz 28a an und sperrt den Vorsteuer-Speisekanal 42a ab. Gleichzeitig ist der stirnseitige Endabschnitt 23a über den Vorsteuer-Arbeitskanal 44a und den Vorsteuer-Entlüftungskanal 45a zur Umgebung hin entlüftet. Bei entsprechender Aktivierung des zweiten Vorsteuerventils 5b kann somit der Ventilschieber 6 in der Zeichnung nach rechts in die unterhalb der Mittellinie gezeigte erste Schaltstellung verbracht werden. Zum Umschalten des Ventilschiebers 6 nach links in die in der Zeichnung oberhalb der Mittellinie abgebildete zweite Schaltstellung wird das erste Vorsteuerventil 5a durch Anlegen einer Erregerspannung aktiviert, sodass das Vorsteuerglied 33 vom Vorsteuerventilsitz 28a abhebt und gleichzeitig am Entlüftungs-ventilsitz 46a zur Anlage gelangt. Nun kann Druckmedium aus dem Vorsteuer-Speisekanal 42a über den Vorsteüer-Arbeitskanal 44a in den benachbarten stirnseitigen Endabschnitt 23a der Schieberaufnahme 12 einströmen und den ersten Antriebsabschnitt 16a mit einer Druckkraft beaufschlagen.Thus, the first pilot valve 5a can be operated with a 3/2-valve function. In the electrically deactivated state, the pilot control member 33 is under the action of a schematically indicated spring 47 on the pilot valve seat 28a and blocks the pilot control feed passage 42a. At the same time, the front end portion 23a is vented to the atmosphere via the pilot working passage 44a and the pilot vent passage 45a. With appropriate activation of the second pilot valve 5b, the valve slide 6 can thus be moved in the drawing to the right in the first switching position shown below the center line. To switch the valve spool 6 to the left in the second switching position shown in the drawing above the center line, the first pilot valve 5a is activated by applying an excitation voltage, so that the pilot member 33 from the pilot valve seat 28a lifts and at the same time comes to the vent valve seat 46a to the plant. Now, pressure medium from the pilot feed channel 42a via the Vorsteüer working channel 44a in the adjacent front end portion 23a of the slide holder 12 to flow and the first drive portion 16a act on a compressive force.

Das der zweiten Stirnseite der Schieberaufnahme 12 zugeordnete zweite Vorsteuerventil 5b hat mit einer Ausnahme den gleichen Aufbau wie das erste Vorsteuerventil 5a. Bei den einander entsprechenden Komponenten wurde daher den Bezugsziffern an Stelle des Buchstabens "a" der Buchstabe "b" angefügt. Im Übrigen gilt die Funktionsbeschreibung zum ersten Vorsteuerventil 5a in Bezug auf das zweite Vorsteuerventil 5b entsprechend.The second pilot valve 5b associated with the second end face of the slide holder 12 has, with one exception, the same structure as the first pilot valve 5a. In the case of the corresponding components, therefore, the reference numbers have been replaced by the letter "a" instead of the letter "a". Incidentally, the functional description for the first pilot valve 5a with respect to the second pilot valve 5b applies accordingly.

Der wesentliche Unterschied zwischen den beiden Vorsteuerventilen 5a, 5b besteht darin, dass beim zweiten Vorsteuerventil 5b das Bodenteil 26b kein einstückiger Bestandteil des Gehäusehauptteils 8 ist, sondern von dem gesondert vom Gehäusehauptteil 8 ausgeführten Deckelteil 25 gebildet ist. Folglich befindet sich bei dem zweiten Vorsteuerventil 5b auch die Montageschnittstelle 27b und der Vorsteuerventilsitz 28b an dem Deckelteil 25. Die Funktionsweise der beiden Vorsteuerventile 5a, 5b ist identisch, sodass der Ventilschieber 6 durch aufeinander abgestimmte Beaufschlagung und Entlüftung der stirnseitigen Endabschnitte 23a, 23b der Schieberaufnahme 12 wahlweise in die eine oder andere Richtung verschoben werden kann.The essential difference between the two pilot valves 5a, 5b is that in the second pilot valve 5b the bottom part 26b is not an integral part of the housing main part 8, but is formed by the cover part 25 which is separate from the housing main part 8. Consequently, in the case of the second pilot valve 5b, the mounting interface 27b and the pilot valve seat 28b are also located on the cover part 25. The functioning of the two pilot valves 5a, 5b is identical, so that the valve slide 6 by coordinated loading and venting of the end-side end portions 23a, 23b of the slide receptacle 12 can be moved either in one or the other direction.

Indem bei dem zweiten Vorsteuerventil 5b das Bodenteil 26b von dem Deckelteil 25 gebildet ist, ist eine leichte Trennung vom Gehäusehauptteil 8 möglich, sodass die offene Stirnseite der Schieberaufnahme 12 zugänglich ist, um den Ventilschieber 6 und die Dichtungsmittel 15 installieren und bei Bedarf deinstallieren zu können.By forming the bottom part 26b of the cover part 25 in the second pilot valve 5b, it is possible to easily separate it from the housing main part 8 so that the open end side of the slide receptacle 12 is accessible in order to be able to install the valve slide 6 and the sealing means 15 and to be able to uninstall it if necessary ,

Beim Ausführungsbeispiel ist das erste Vorsteuerventil 5a so ausgebildet und angeordnet, dass sein Vorsteuerventilsitz 28a in axialer Verlängerung der Schieberaufnahme 12 zu liegen kommt. Eine solche Bauform ist ohne weiteres möglich, wenn die Schieberaufnahme 12 an der ersten Stirnseite unmittelbar durch das Gehäusehauptteil 8 verschlossen ist. Es wäre jedoch prinzipiell möglich, das erste Vorsteuerventil 5a so an der Stirnseite des Gehäusehauptteils 8 zu platzieren, dass die in axialer Verlängerung der Schieberaufnahme 12 liegende Zone nicht belegt wird, sodass auch an dieser Stirnseite ein abnehmbarer Deckel für die Schieberaufnahme 12 vorgesehen werden kann. Dieser Deckel hat dann jedoch keine Funktion bezüglich des ersten Vorsteuerventils 5a.In the exemplary embodiment, the first pilot valve 5a is designed and arranged such that its pilot valve seat 28a comes to lie in the axial extension of the slide holder 12. Such a design is readily possible if the slide holder 12 is closed at the first end side directly by the housing main part 8. However, it would be possible in principle to place the first pilot valve 5a on the front side of the housing main part 8 so that the zone lying in the axial extension of the slider receptacle 12 is not occupied, so that a removable cover for the slide receptacle 12 can also be provided on this end face. However, this cover then has no function with respect to the first pilot valve 5a.

In der Zeichnung ist strichpunktiert bei 48 angedeutet, dass mindestens ein Vorsteuerventil 48 bei Bedarf auch Längsseits am Hauptventil 4 platziert werden kann, und zwar insbesondere an der Oberseite des Hauptventilgehäuses 7. Im Sinne des Grundgedankens der Erfindung ist somit eine Montageschnittstelle 27c sowie mindestens ein zugehöriger Vorsteuerventilsitz 28c als integraler Bestandteil des Gehäusehauptteils 8 an dessen Längsseite angeordnet und mit einem Kopfstück 32 des betreffenden Vorsteuerventils 48 bestückt. Je nach Ausgestaltung können bei Bedarf ein oder zwei Vorsteuerventile in entsprechender Weise längsseits am Gehäusehauptteil 8 vorgesehen werden.In the drawing, dash-dotted lines at 48 indicate that at least one pilot valve 48 can also be placed longitudinally on the main valve 4 if necessary, in particular on the upper side of the main valve housing 7. In the sense of the basic concept of the invention, a mounting interface 27c and at least one associated one are therefore provided Pilot valve seat 28 c arranged as an integral part of the housing main part 8 on the longitudinal side and with a head piece 32nd of the respective pilot valve 48 equipped. Depending on the configuration, if necessary, one or two pilot valves can be provided in a corresponding manner alongside the housing main part 8.

Sofern das Mehrwegeventil 1 über zwei Vorsteuerventile verfügt, besteht auch die Möglichkeit, diese zu einer Vorsteuereinheit zusammenzufassen, wie dies in der Zeichnung bei 52 strichpunktiert angedeutet ist. In diesem Fall sind einer an dem Gehäusehauptteil 8 vorgesehenen Montageschnittstelle 27d gleichzeitig zwei Vorsteuerventilsitze 28d zugeordnet, die in das Gehäusehauptteil 8 integriert sind, wobei das angesetzte Kopfstück 32 der Vorsteuereinheit 52 zwei jeweils einem der Vorsteuerventilsitze 28d zugeordnete Vorsteuerglieder 33 enthält.If the multi-way valve 1 has two pilot valves, it is also possible to combine them into a pilot unit, as indicated by dash-dotted lines in the drawing at 52. In this case, a mounting interface 27d provided on the housing main part 8 is simultaneously associated with two pilot valve seats 28d which are integrated into the housing main part 8, wherein the attached headpiece 32 of the pilot control unit 52 contains two pilot control members 33 each associated with one of the pilot valve seats 28d.

Zurückkommend zu den erläuterten ersten und zweiten Vorsteuerventilen 5a, 5b ist noch zu erwähnen, dass diese jeweils zusätzlich mit einer Handhilfsbetätigungseinrichtung 53a, 53b ausgestattet sind. Diese ist jeweils in das zugeordnete Bodenteil 26a, 26b integriert. Im Falle des ersten Vorsteuerventils 25a hat dies zur Folge, dass die Handhilfsbetätigungseinrichtung 53a in das Gehäusehauptteil 8 eingebaut ist und sich somit in der gleichen Komponente befindet, die auch die Montageschnittstelle 27a und den Vorsteuerventilsitz 28a des zugeordneten ersten Vorsteuerventils 5a bildet.Coming back to the illustrated first and second pilot valves 5a, 5b, it should also be mentioned that these are each additionally equipped with a manual override device 53a, 53b. This is in each case integrated in the associated bottom part 26a, 26b. In the case of the first pilot valve 25a, this results in the manual override device 53a being installed in the housing main body 8 and thus being in the same component which also forms the mounting interface 27a and the pilot valve seat 28a of the associated first pilot valve 5a.

Im Falle des zweiten Vorsteuerventils 5b sitzt die Handhilfsbetätigungseinrichtung 53b zweckmäßigerweise in dem Deckelteil 25.In the case of the second pilot valve 5b, the manual override device 53b is expediently located in the cover part 25.

In beiden Fällen kann die Handhilfsbetätigungseinrichtung 53a, 53b über ein bevorzugt stößelartiges Stellglied 54 verfügen, das in einer quer zur Längsrichtung des Vorsteuergliedes 33 ausgerichteten Ausnehmung 55 des Bodenteils 26a, 26b verschiebbar angeordnet ist, wobei die Ausnehmung 55 einenends zur Außenseite des Bodenteils 26 und andernends in die Ventilkammer 43 einmündet. An dem der Ventilkammer 43 zugewandten vorderen Ende verfügt das Stellglied 54 über eine bevorzugt als Schrägfläche ausgebildete Beaufschlagungspartie 56, die das Vorsteuerglied 33 untergreift und vom zugeordneten Vorsteuerventilsitz 28a, 28b abhebt, wenn das Stellglied 54 in Richtung des Vorsteuergliedes 33 verlagert wird.In both cases, the manual override 53a, 53b may have a preferably plunger-like actuator 54 which is slidably disposed in a recess 55 of the bottom portion 26a, 26b oriented transversely to the longitudinal direction of the pilot member 33, the recess 55 being at one end towards the outside of the bottom portion 26 and at the other end opens into the valve chamber 43. At the valve chamber 43 facing the front end of the actuator 54 has a preferably designed as an inclined surface Beaufschlagungspartie 56 which engages under the pilot valve 33 and the associated pilot valve seat 28a, 28b lifts when the actuator 54 is displaced in the direction of the pilot member 33.

Das Verlagern des Stellgliedes 54 kann manuell hervorgerufen werden. Zu diesem Zweck besitzt das Stellglied 54 rückseitig eine von außen her zugängliche Betätigungspartie 57.The displacement of the actuator 54 can be caused manually. For this purpose, the actuator 54 has a rear side accessible from the outside operating part 57th

Claims (15)

  1. Pilot-operated multiway valve, with a main valve (4) comprising a main valve housing (7) and an oblong valve spool (6) housed in a spool location (12) thereof, wherein the valve spool (6) comprises a control section (13) controlling the connection between valve passages (14) laterally terminating at the spool location (12) and a drive section (16a, 16b) for the controlled supply of fluid at at least one end, wherein at least that part of the spool location (12) which accommodates the control section (13) is located in a single-piece housing main part (8) of the valve housing (7), and with at least one pilot valve (5a, 5b, 48) forming an assembly together with the main valve (4) and controlling the supply of fluid to at least one drive section (16a, 16b) of the valve spool (6), which comprises a head piece (32) featuring an electrically operated pilot member (33) and mounted on a mounting interface (27a, 27b, 27c) provided with a pilot valve seat (28a, 28c, 28d), said interface including the associated pilot valve seat (28a, 28c, 28d) forming an integral part of the housing main part (8) of the main valve housing (7), to which the head piece (32) of the relevant pilot valve (5a, 5b, 48) directly fitted, characterised in that the at least one pilot valve (5a, 5b, 48) is provided with an auxiliary manual actuating device (53a) integrated into the housing main part (8).
  2. Multiway valve according to claim 1, characterised in that the pilot valve seat (28a, 28c, 28d) is integrated with the housing main part (8).
  3. Multiway valve according to claim 1 or 2, characterised in that the housing main part (8) of the main valve housing (7) is made of a plastic material.
  4. Multiway valve according to any of claims 1 to 3, characterised in that the housing main part (8) has an oblong shape, at least one mounting interface (27c) with the associated pilot valve seat (28c) being located on a side of the housing main part (8).
  5. Multiway valve according to any of claims 1 to 4, characterised in that the housing main part (8) has an oblong shape, at least one mounting interface (27a) with the associated pilot valve seat (28a) being located at an end face of the housing main part (8).
  6. Multiway valve according to claim 5, characterised in that the spool location (12) is tightly sealed by a wall section (24) represented by the single-piece housing main part (8) at the end face where the mounting interface (27a) is located.
  7. Multiway valve according to claim 6, characterised in that the pilot valve seat (28a) is arranged in axial extension of the spool location (12) on that side of the housing main part (8) which is axially remote from the spool location (12).
  8. Multiway valve according to any of claims 1 to 7, characterised in that the auxiliary manual actuating device (53a) comprises a control element (54) adjustably located in a recess (55) of the housing main part (8) and capable of being operated from the outside, which can act mechanically on the associated pilot member (33).
  9. Multiway valve according to any of claims 1 to 8, characterised by two electrically operated pilot valves (5a, 5b) for the actuation of the valve spool (6) in two directions by means of supplying fluid, wherein at least one pilot valve (5a) comprises a head piece (32) fitted to a mounting interface (27a) of the housing main part (8), which is provided with a pilot valve seat (28a).
  10. Multiway valve according to claim 9, characterised in that the valve spool (6) is provided at both ends with a drive section (16a, 16b) to which a fluid can be supplied.
  11. Multiway valve according to claim 9 or 10, characterised in that the two pilot valves (5a, 5b) are located at opposite end faces of the main valve (4), wherein a mounting interface (27a) including the pilot valve seat (28a) of one pilot valve (5a) is integrated with the housing main part (8), while the mounting interface (27b) of the other pilot valve (5b) is located on a cover part (25) provided at the end face of the housing main part (8) and sealing the spool location (12).
  12. Multiway valve according to claim 9 or 10, characterised in that two pilot valves (5a, 5b) are combined to form a pilot unit (52) with a head piece (32) comprising two pilot members (33), which is mounted on a mounting interface (27d) of the housing main part (8), which is provided with two integrated pilot valve seats (28d).
  13. Multiway valve according to any of claims 1 to 12, characterised in that the at least one pilot valve (5a, 5b, 48) is a solenoid valve.
  14. Multiway valve according to any of claims 1 to 13, characterised in that the at least one drive section (16a, 16b) is integrated with the control section (13).
  15. Multiway valve according to any of claims 1 to 14, characterised in that the entire length of the valve spool (6) is accommodated within the housing main part (8).
EP20040019351 2003-09-25 2004-08-14 Pilot operated multiple-way valve Not-in-force EP1519054B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10344458 2003-09-25
DE2003144458 DE10344458B3 (en) 2003-09-25 2003-09-25 Pilot operated multiway valve

Publications (3)

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EP1519054A2 EP1519054A2 (en) 2005-03-30
EP1519054A3 EP1519054A3 (en) 2005-07-20
EP1519054B1 true EP1519054B1 (en) 2007-02-21

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EP20040019351 Not-in-force EP1519054B1 (en) 2003-09-25 2004-08-14 Pilot operated multiple-way valve

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US (1) US7207353B2 (en)
EP (1) EP1519054B1 (en)
AT (1) ATE354733T1 (en)
DE (2) DE10344458B3 (en)
ES (1) ES2279265T3 (en)

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DE102010044632B4 (en) * 2010-09-07 2012-08-16 Festo Ag & Co. Kg Pilot operated multiway valve
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US10837473B2 (en) * 2016-03-24 2020-11-17 Tadano Ltd. Hydraulic system

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Also Published As

Publication number Publication date
DE10344458B3 (en) 2005-05-25
US20050067030A1 (en) 2005-03-31
EP1519054A3 (en) 2005-07-20
EP1519054A2 (en) 2005-03-30
US7207353B2 (en) 2007-04-24
ES2279265T3 (en) 2007-08-16
DE502004002941D1 (en) 2007-04-05
ATE354733T1 (en) 2007-03-15

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