EP1035331A2 - Pilot-operated multiway valve - Google Patents

Pilot-operated multiway valve Download PDF

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Publication number
EP1035331A2
EP1035331A2 EP99126259A EP99126259A EP1035331A2 EP 1035331 A2 EP1035331 A2 EP 1035331A2 EP 99126259 A EP99126259 A EP 99126259A EP 99126259 A EP99126259 A EP 99126259A EP 1035331 A2 EP1035331 A2 EP 1035331A2
Authority
EP
European Patent Office
Prior art keywords
control
valve
pressure medium
pilot
valve unit
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
EP99126259A
Other languages
German (de)
French (fr)
Other versions
EP1035331A3 (en
EP1035331B1 (en
Inventor
Erwin Kulmann
Karl Troltsch
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1035331A2 publication Critical patent/EP1035331A2/en
Publication of EP1035331A3 publication Critical patent/EP1035331A3/en
Application granted granted Critical
Publication of EP1035331B1 publication Critical patent/EP1035331B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803Modular units
    • F15B13/0832Modular valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401Valve members; Fluid interconnections therefor
    • F15B13/0405Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803Modular units
    • F15B13/0807Manifolds
    • F15B13/0817Multiblock manifolds
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803Modular units
    • F15B13/0821Attachment or sealing of modular units to each other
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803Modular units
    • F15B13/0846Electrical details
    • F15B13/085Electrical controllers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803Modular units
    • F15B13/0846Electrical details
    • F15B13/0857Electrical connecting means, e.g. plugs, sockets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803Modular units
    • F15B13/0875Channels for electrical components, e.g. for cables or sensors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002Modular valves, i.e. consisting of an assembly of interchangeable components
    • F15B2013/006Modular components with multiple uses, e.g. kits for either normally-open or normally-closed valves, interchangeable or reprogrammable manifolds

Definitions

  • the invention is based on a pilot-controlled directional valve corresponding to the genus of the two independent claims 1 and 2.
  • One equipped with two such directional valves Valve unit is, for example, from US 5,103,866 already known.
  • this valve unit are the Locking members independently in a common Housing guided and coaxial or parallel to each other arranged.
  • the locking members are among themselves identically designed and with control pistons at their ends different dimensions.
  • In active connection with the seat bodies on the housing side form the locking members two seat valves each.
  • Poppet valves In contrast to the object of the invention Poppet valves have valve openings of the same size and that Piston area of one of the control pistons corresponds in its Area of a valve opening. In the different Switch position lies on the control pistons of the closing elements permanent control pressure on, the reversal takes place through Change in the contacting of the different connections. In total, the entire directional valve has seven different ones Pressure chambers. Its casing is therefore elaborate to manufacture and takes up large construction volume.
  • An extension of this well-known Design for a valve concept that is pressure medium controlled resettable or mechanically resettable pulse valves and switching valves includes and in which the Locking elements can be arranged coaxially or multiaxially, is at most with this construction with considerable Additional effort possible.
  • the precontrollable according to the invention Directional control valve with the characterizing features of claims 1 or 2 the advantage that it is relatively small Construction effort, the formation of a complete valve concept in the above Scope allowed.
  • Different valve variants can be done with simple structural changes realize.
  • the proposed directional valve is made up of several identical parts built and thus requires only small parts and Storage costs.
  • Figure 1 shows a pre-controllable according to the invention
  • Figures 2 to 6 show pilot operated valve units consisting of several directional valves are constructed according to Figure 1, in different designs.
  • Figure 7 the one disclosed in Figure 2 is an example Embodiment of a valve unit as a circuit symbol shown.
  • FIG 1 is a first embodiment of a pilot-controlled directional valve 10 shown.
  • This instructs only schematically illustrated housing 12 in which a continuous and multiple in their inner diameter stepped slide bore 14 is formed. The latter is closed at their ends by plugs 16, wherein in FIG only one stopper 16 is shown as an example.
  • In the Slider bore 14 open transversely to the longitudinal axis running and labeled with the letters P, A and R. Pressure medium channels like a blind hole. The arrival assigned and leading pressure medium under operating pressure Pressure medium channel P and the unpressurized return assigned pressure medium channel R are the pressure medium channel A across from. The latter is with a not drawn Consumers coupled.
  • the Pressure medium channels P, A, R spaced from each other, whereby the consumer-side pressure medium channel A between the Supply of pressure medium channels P and R is located.
  • the opposite arrangement of the Pressure medium channels P and R to A is for the function of the Directional control valve 10 not determining.
  • first Seat body 18 In between the pressure medium channels P and A Wall area of the slide bore 14 is a first Seat body 18 and in the section between the Pressure medium channels A and R is a second seat body 20 arranged. Both seat bodies 18 and 20 are annular executed and point to their facing away from each other End faces on bundles, the valve openings 22, 24 in the Limit seat bodies 18, 20. These valve openings 22 and 24 are of different sizes, the larger one Valve opening 22 the first seat body 18 and the smaller one Valve opening 24 is assigned to the second seat body 20.
  • a slider penetrating both valve openings 22 and 24 26 is axially movable in the slide bore 14.
  • This slide 26 has a thickened diameter Piston 27 with first and second attached thereto Sealing discs 28, 30 and one in diameter withdrawn and connecting the pistons 27 together Coupling section 29.
  • Control piston 32, 34 At the ends of the slide 26 are Control piston 32, 34 of different external dimensions arranged. For assembly reasons, it is adjacent to second seat body 20 lying and larger in diameter Control piston 34 mounted on the slide 26 during the smaller first control piston 32 in one piece with the slide 26 can be trained. Wear both control pistons 32 and 34 in circumferential grooves sealing rings 36 for sealing Control chambers 38, 40 in which the control pistons 32, 34 are guided are.
  • the smaller spool 32 is larger than that Designed valve opening 24 of the smaller seat body 20, likewise, the large control piston 34 takes up a larger area than the valve opening 22 of the large seat body 18.
  • the Area differences result taking into account the Function of the directional control valve 10 described below in Connection with those prevailing under operating conditions Friction and pressure conditions in the directional control valve 10.
  • a reversal of the directional valve 10 in the not shown Switch position takes place by a brief pressure pulse on the first control piston 32.
  • This causes the first to lie down Sealing disk 28 to which the first valve opening 22 limiting collar of the seat body 18 and interrupts the Connection between the pressure medium channel P and the Pressure medium channel A.
  • the Pressure medium channel A through the valve opening 24 of the second Seat body 20 through with the pressure medium channel R coupled.
  • the due to the area difference between the first valve opening 22 and the control piston 32 generated Pressing force on the slide 26 presses the sealing disk 28 against the seat body 18, this pressure force from Operating pressure is dependent and with increasing operating pressure increases.
  • the control chambers 38, 40 are depressurized.
  • control chambers 38 and 40 with Pressure medium for reversing the directional control valve 10 happens via arranged in the housing 12 and in Figure 1 only as dash-dotted lines indicated control channels. This are not recognizable by one in FIG Pilot valve supplied with pressure medium, the Pilot valve itself from the inlet side Supply channels branching off pressure medium channel P - not drawn - can be controlled.
  • FIG. 2 shows a structural unit 44 consisting of a base plate 46, a pilot valve 48 and a valve unit 50.
  • the latter has a block-shaped housing 52, which together with the pilot valve 48 is anchored on the base plate 46.
  • This base plate 46 is perpendicular to the plane of the drawing pressure medium-carrying channels 54 through which the joint supply or disposal, possibly several adjacent units 44 can be done.
  • the base plate 46 is included Stub channels 56 provided the pressure medium connections between the connections of the valve unit 50 and the Create channels 54.
  • the base plate 46 has one continuous cavity 47 in which an electronic Control device 49 is housed. This controls it Pilot valve 48 electronically.
  • the valve unit 50 has a 5/2-way function and does so its housing 52 has two separate directional valves 58 and 60 on.
  • the directional control valve 58 is identical to Directional valve 10 constructed according to Figure 1.
  • that has Coaxial second directional valve 60 a slide 64 the piston 66 with the seat bodies 68 and 70 so-called inner sealing valve forms.
  • At internally sealing valves are the valve openings 72 and 74 surrounding bundles of seat bodies 68, 70, in contrast to external sealing systems according to Figure 1, on each other facing inner sides of this seat body 68, 70 arranged. Accordingly, the pistons 66 are located with their Sealing discs 78, 80 between the two seat bodies 68, 70 and not outside of it.
  • Directional control valve 58 (10) is also that now the connection from the inlet-side pressure medium channel P to the second consumer-side pressure medium channel B from the seat body 68 with the smaller valve opening 72 is controlled while at the pressure medium connection between the pressure medium channel B and R are in the opposite order.
  • Directional control valve 60 is a particularly inexpensive training of the housing 52 with a single, continuous Slide bore 53 reached. Even the arrangement of the Control channels in this housing 52 is proportional easy to implement. In this regard, the Reference made to FIG. 3.
  • the housing 52 is independent of the Control several control channels 90a-e provided.
  • the Control channel 90a establishes a pressure medium connection the control chamber 96, in which in the embodiment two small actuating pistons 32, 82 are arranged together and the control channel 90b that leads to the pilot valve 48 leads.
  • the one leading to the outside of the valve unit 50 Part of the pressure medium channel 90a is only out manufacturing reasons exist and has none function carrying pressure medium. He is after for these reasons locked on the outside, for example not by one drawn plug.
  • another control channel 90c connects this Pilot valve 48 with a branch of the inlet side Pressure medium channel P, which in the slide bore 53 of the Directional valve 58, 60 opens.
  • control channel 90c the pilot valve 48 is supplied with pressure medium.
  • a control channel 90d is provided which, starting from the Pilot valve 48 to that labeled R. return-side pressure medium channel of the directional valve 60 leads.
  • the control channels 90b-d are essentially parallel to slide bore 53.
  • Another control channel 90e lies on that of the control channels 90a-d opposite side of the slide bore 53 and connects the two external control chambers 40 and 100 the directional control valves 58 and 60 with each other. In addition, this leads Control channel 90e also to pilot valve 48.
  • the valve unit 50 shown in FIG. 3 counteracts the pulse valve according to Figure 2 as a changeover valve Pressure fluid provision. That's the two of them Directional control valves 58 and 60 common control chamber 96 over the Control channels 90a and 90b permanently with operating pressure acted upon. This results in the control pistons 32 and 82 the two directional valves 58, 60 in the basic position shown. For reversal the valve unit 50 become the external control chambers 40 and 100 of the two way valves 58, 60 also with Operating pressure applied. This is done by the Pilot valve 48 via the control channel 90e.
  • the one from the Control pistons 34 and 84 of directional control valves 58 and 60 The pressure force caused is different due to the large pressurized areas larger than that of the Diameter smaller control piston 32, 82 applied Drag.
  • the on these adjusting pistons 32 and 82 provided sealing rings 36 omitted without replacement. This can build up pressure in the Control chamber 96 also through the guide column of this Actuating pistons 32 and 82 take place.
  • the control channels 90a or 90b are not required in this case.
  • the pressure is controlled by the external control chambers 40, 100 via the control channels 90d and 90e to the pressure medium channel R on the return side be relieved of pressure.
  • the valve unit 50 acts in contrast to the bistable Pulse valve of the embodiment of Figure 2 as pure changeover valve or monostable valve, in which at least one of the control chambers 40, 96, 100 permanent Operating pressure is present.
  • the valve unit 50 can, as shown in FIG. 4, also as Changeover valve with mechanical reset become.
  • the two Directional control valves 58 and 60 common, control chamber 96 not pressurized.
  • the control channels 90a and 90b are closed, for example by pressing a Sealing plug.
  • the control chamber 96 is by means of a Connection to the pressure medium channel R or to the environment vented. Is between the two control pistons 32 and 82 a compression spring 102 is clamped. This presses the two Slider 26 and 64 of the directional valves 58, 60 in the drawn Home position and is dimensioned so that the one possible pressurization of the control chambers 40, 100 pressure forces generated by the control pistons 34, 84 are sufficient to overcome their bias.
  • Figure 5 shows a variant of a valve unit 50, at the two directional control valves 58 and 60 are not coaxial, but are arranged parallel to one another in the housing 52.
  • the longitudinal axes of the directional control valves 58, 60 run vertically to the contact surface of the valve unit 50 on the base plate 46.
  • the two directional valves 58, 60 are, apart from one two-part design of the slide bore 53a and 53b in Housing 52, identical to that of the previous Embodiments executed.
  • With the slide bores 53a and 53b are continuous cross holes in the Housing 52, which at one end of the base plate 46th and at the opposite second end of plug 104 are closed.
  • the pressure medium channels P and R are at a right angle the slide bores 53a, b in the direction of the pilot valve 48. They connect the slide bores 53a and 53b with each other and end in a blind hole in the slide hole 53a. The same applies to the control chambers 96a, b, 40 and 100 leading control channels 90a and 90e. Also the Pressure medium channels A and B are perpendicular to the Slider bores 53a, b aligned, but are in the No difference to the pressure medium channels P and R. coupled with each other, but run to each other opposite outer sides of the housing 52, where they from pressed balls 106 are closed pressure-tight. Aligned parallel to the slide bores 53a, b Longitudinal channels 108 connect the Pressure medium channels A, B to circumferential connections 110. These connections 110 may alternatively be on the base plate 46 or be provided on the housing 52.
  • This construction variant makes it particularly compact Realize the construction of a valve unit 50, its housing 52 due to the right-angled ducting is relatively easy to manufacture.
  • FIG. 6 shows one with a pilot valve 48 coupled valve unit 50 with likewise two-part, parallel arrangement of the slide bores 53a, b.
  • Both Slider bores 53a, b run here in contrast to Embodiment according to Figure 5 in longitudinal and not in Transverse direction to the housing 52.
  • the pressure medium connections A and B can be advantageously in the on Pilot valve 48 facing away from the end face of the valve unit Arrange 50.
  • the various control channels shown in Figure 6 only schematically indicated by dashed lines are also in this variant in longitudinal or Transverse direction to the housing 52. To repeat in Avoiding their function will be on the previous ones Explanations referenced.
  • valve units 50 with 5/2-way valve function which essentially consist of two of the Types of directional valves 58, 60 on which the invention is based are built up. All of the disclosed valve units 50 have a large number of identical parts and are at least partly through simple constructive interventions transferable. The construction principle on which the invention is based of directional valves 10, 58, 60 can therefore be one Extend the modular valve system with which no significant technical effort various customer requests are realizable.
  • FIG. 7 shows the circuit symbol for a valve unit 50, in the embodiment according to embodiment 2.
  • the valve unit 50 is switched over their two switching positions by means of electropneumatic actuated pilot valves 48.
  • the valve unit 50 has a total of five connections labeled P, R, A and B, which are numbered 1 to 5 for simplicity.
  • Port 1 or P is with a not shown Pressure generator connected, port 2 to consumer A, the connections 3 and 5 with a return R and the connection 4 with the second consumer B.
  • In the first Switch positions are connections 1 and 2 or 4 and 5 connected to each other, is in the second switching position Port 1 with port 4 and port 2 with port 3 contacted.
  • Port 3 is in switch position 1 and port 5 locked in switch position 2.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Driven Valves (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

A control chamber(38,40) is provided for each control piston(32,34), and the seating components(18,20) have differently sized valve ports(22,24). To create an externally sealing system whereby the end faces of the seating component facing away from each other interact with the spool(26), the seating component which controls a pressure medium connection between the pressure medium channels(P,A) has the larger valve port and lies adjacent to the control piston(32) with the smaller piston area.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem vorsteuerbaren Wegeventil entsprechend der Gattung der beiden unabhängigen Ansprüche 1 und 2. Eine mit zwei derartigen Wegeventilen ausgestattete Ventileinheit ist beispielsweise aus der US 5,103,866 bereits bekannt. In dieser Ventileinheit sind die Schließglieder unabhängig voneinander in einem gemeinsamen Gehäuse geführt und gleichachsig oder parallel zueinander angeordnet. Ferner sind die Schließglieder untereinander identisch ausgebildet und an ihren Enden mit Steuerkolben unterschiedlicher Abmessungen versehen. In Wirkverbindung mit gehäuseseitigen Sitzkörpern bilden die Schließglieder jeweils zwei Sitzventile aus.The invention is based on a pilot-controlled directional valve corresponding to the genus of the two independent claims 1 and 2. One equipped with two such directional valves Valve unit is, for example, from US 5,103,866 already known. In this valve unit are the Locking members independently in a common Housing guided and coaxial or parallel to each other arranged. Furthermore, the locking members are among themselves identically designed and with control pistons at their ends different dimensions. In active connection with the seat bodies on the housing side form the locking members two seat valves each.

Im Unterschied zum Gegenstand der Erfindung haben die Sitzventile gleich große Ventilöffnungen und die Kolbenfläche eines der Stellkolben entspricht in ihrer Fläche der einer Ventilöffnung. In den verschiedenen Schaltstellung liegt an den Steuerkolben der Schließglieder permanent Steuerdruck an, die Umsteuerung erfolgt durch Änderung der Kontaktierung der verschiedenen Anschlüsse. Insgesamt weist das gesamte Wegeventil sieben verschiedene Druckkammern auf. Sein Gehäuse ist deshalb fertigungstechnisch aufwendig herzustellen und nimmt ein großes Bauvolumen ein. Eine Erweiterung dieser bekannten Bauform zu einem Ventilkonzept, das druckmittelgesteuert rückstellbare oder mechanisch rückstellbare Impulsventile und Umschaltventile gleichermaßen umfaßt und bei dem die Schließglieder gleichachsig oder mehrachsig anordenbar sind, ist bei dieser Bauweise allenfalls mit erheblichem Zusatzaufwand realisierbar.In contrast to the object of the invention Poppet valves have valve openings of the same size and that Piston area of one of the control pistons corresponds in its Area of a valve opening. In the different Switch position lies on the control pistons of the closing elements permanent control pressure on, the reversal takes place through Change in the contacting of the different connections. In total, the entire directional valve has seven different ones Pressure chambers. Its casing is therefore elaborate to manufacture and takes up large construction volume. An extension of this well-known Design for a valve concept that is pressure medium controlled resettable or mechanically resettable pulse valves and switching valves includes and in which the Locking elements can be arranged coaxially or multiaxially, is at most with this construction with considerable Additional effort possible.

Vorteile der ErfindungAdvantages of the invention

Demgegenüber weist das erfindungsgemäße vorsteuerbare Wegeventil mit den kennzeichnenden Merkmalen der Ansprüche 1 oder 2 den Vorteil auf, daß es bei relativ geringem Bauaufwand die Ausbildung eines vollständigen Ventilkonzepts in o.g. Umfang erlaubt. Unterschiedliche Ventilvarianten lassen sich mit einfachen baulichen Veränderungen realisieren. Als besonders vorteilhaft hat sich die Bauvariante eines bistabilen oder impulsgesteuerten Doppelsitzventils aufgrund seiner kurzen Ansprech- und Schaltzeiten und seiner guten inneren Dichtheit erwiesen. Diese Dichtheit nimmt mit zunehmendem Systemdruck aufgrund der auf das Schließglied einwirkende Druckkraft zu. Das vorgeschlagene Wegeventil ist aus mehreren Gleichteilen aufgebaut und erfordert somit nur geringe Teile- und Lagerkosten.In contrast, the precontrollable according to the invention Directional control valve with the characterizing features of claims 1 or 2 the advantage that it is relatively small Construction effort, the formation of a complete valve concept in the above Scope allowed. Different valve variants can be done with simple structural changes realize. The has been particularly advantageous Construction variant of a bistable or pulse-controlled Double seat valve due to its short response and Switching times and its good internal tightness proven. This tightness decreases with increasing system pressure the pressure force acting on the closing element. The proposed directional valve is made up of several identical parts built and thus requires only small parts and Storage costs.

Weitere Vorteile oder vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der Beschreibung.Further advantages or advantageous developments of Invention result from the dependent claims and the Description.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Embodiments of the invention are in the drawing shown and in the following description explained.

Die Figur 1 zeigt ein erfindungsgemäßes vorsteuerbares Wegeventil in einer sogenannten außendichtenden Ausführungsform im Längsschnitt; die Figuren 2 bis 6 zeigen vorgesteuerte Ventileinheiten, die aus mehreren Wegeventilen nach Figur 1 aufgebaut sind, in verschiedenen Bauvarianten. In Figur 7 ist beispielhaft das in Figur 2 offenbarte Ausführungsbeispiel einer Ventileinheit als Schaltsymbol dargestellt.Figure 1 shows a pre-controllable according to the invention Directional control valve in a so-called external seal Embodiment in longitudinal section; Figures 2 to 6 show pilot operated valve units consisting of several directional valves are constructed according to Figure 1, in different designs. In Figure 7, the one disclosed in Figure 2 is an example Embodiment of a valve unit as a circuit symbol shown.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In Figur 1 ist ein erstes Ausführungsbeispiel eines vorsteuerbaren Wegeventils 10 dargestellt. Dieses weist ein nur schematisch dargestelltes Gehäuse 12 auf, in dem eine durchgehende und in ihrem Innendurchmesser mehrfach abgesetzte Schieberbohrung 14 ausgebildet ist. Letztere ist an ihren Enden von Stopfen 16 verschlossen, wobei in Figur 1 nur ein Stopfen 16 exemplarisch dargestellt ist. In die Schieberbohrung 14 münden quer zu deren Längsachse verlaufende und mit den Buchstaben P, A und R bezeichnete Druckmittelkanäle sacklochartig ein. Der dem Zulauf zugeordnete und Druckmittel unter Betriebsdruck führende Druckmittelkanal P und der dem drucklosen Rücklauf zugeordnete Druckmittelkanal R liegen dem Druckmittelkanal A gegenüber. Letzterer ist mit einem nicht gezeichneten Verbraucher gekoppelt.In Figure 1 is a first embodiment of a pilot-controlled directional valve 10 shown. This instructs only schematically illustrated housing 12 in which a continuous and multiple in their inner diameter stepped slide bore 14 is formed. The latter is closed at their ends by plugs 16, wherein in FIG only one stopper 16 is shown as an example. In the Slider bore 14 open transversely to the longitudinal axis running and labeled with the letters P, A and R. Pressure medium channels like a blind hole. The arrival assigned and leading pressure medium under operating pressure Pressure medium channel P and the unpressurized return assigned pressure medium channel R are the pressure medium channel A across from. The latter is with a not drawn Consumers coupled.

In Längsrichtung des Wegeventils 10 betrachtet, sind die Druckmittelkanäle P,A,R zueinander beabstandet, wobei sich der verbraucherseitige Druckmittelkanal A zwischen den der Versorgung mit Druckmittel dienenden Druckmittelkanälen P und R befindet. Die gegenüberliegende Anordnung der Druckmittelkanäle P und R zu A ist für die Funktion des Wegeventils 10 nicht bestimmend. Viewed in the longitudinal direction of the directional valve 10, the Pressure medium channels P, A, R spaced from each other, whereby the consumer-side pressure medium channel A between the Supply of pressure medium channels P and R is located. The opposite arrangement of the Pressure medium channels P and R to A is for the function of the Directional control valve 10 not determining.

Im zwischen den Druckmittelkanälen P und A liegenden Wandungsbereich der Schieberbohrung 14 ist ein erster Sitzkörper 18 und im Abschnitt zwischen den Druckmittelkanälen A und R ist ein zweiter Sitzkörper 20 angeordnet. Beide Sitzkörper 18 und 20 sind ringförmig ausgeführt und weisen an ihren voneinander abgewandten Stirnflächen Bunde auf, die Ventilöffnungen 22, 24 in den Sitzkörpern 18, 20 begrenzen. Diese Ventilöffnungen 22 und 24 sind unterschiedlich groß dimensioniert, wobei die größere Ventilöffnung 22 dem ersten Sitzkörper 18 und die kleinere Ventilöffnung 24 dem zweiten Sitzkörper 20 zugeordnet ist.In between the pressure medium channels P and A Wall area of the slide bore 14 is a first Seat body 18 and in the section between the Pressure medium channels A and R is a second seat body 20 arranged. Both seat bodies 18 and 20 are annular executed and point to their facing away from each other End faces on bundles, the valve openings 22, 24 in the Limit seat bodies 18, 20. These valve openings 22 and 24 are of different sizes, the larger one Valve opening 22 the first seat body 18 and the smaller one Valve opening 24 is assigned to the second seat body 20.

Ein beide Ventilöffnungen 22 und 24 durchdringender Schieber 26 ist axial beweglich in der Schieberbohrung 14 geführt. Dieser Schieber 26 verfügt über im Durchmesser verdickte Kolben 27 mit daran festgelegten ersten und zweiten Dichtscheiben 28, 30 und einen im Durchmesser zurückgenommenen und die Kolben 27 miteinander verbindenden Koppelabschnitt 29. An den Enden des Schiebers 26 sind Steuerkolben 32, 34 unterschiedlicher Außenabmessungen angeordnet. Aus Montagegründen ist der benachbart zum zweiten Sitzkörper 20 liegende und im Durchmesser größere Steuerkolben 34 auf den Schieber 26 montiert, während der kleinere erste Steuerkolben 32 einteilig mit dem Schieber 26 ausgebildet sein kann. Beide Steuerkolben 32 und 34 tragen in umfangseitigen Nuten Dichtringe 36 zur Abdichtung von Steuerkammern 38, 40, in denen die Steuerkolben 32, 34 geführt sind.A slider penetrating both valve openings 22 and 24 26 is axially movable in the slide bore 14. This slide 26 has a thickened diameter Piston 27 with first and second attached thereto Sealing discs 28, 30 and one in diameter withdrawn and connecting the pistons 27 together Coupling section 29. At the ends of the slide 26 are Control piston 32, 34 of different external dimensions arranged. For assembly reasons, it is adjacent to second seat body 20 lying and larger in diameter Control piston 34 mounted on the slide 26 during the smaller first control piston 32 in one piece with the slide 26 can be trained. Wear both control pistons 32 and 34 in circumferential grooves sealing rings 36 for sealing Control chambers 38, 40 in which the control pistons 32, 34 are guided are.

Der kleinere Steuerkolben 32 ist größer als die Ventilöffnung 24 des kleineren Sitzkörpers 20 ausgelegt, ebenso nimmt der große Steuerkolben 34 eine größere Fläche als die Ventilöffnung 22 des großen Sitzkörpers 18 ein. Die Flächendifferenzen ergeben sich unter Berücksichtigung der nachfolgend beschriebenen Funktion des Wegeventils 10 in Verbindung mit den unter Betriebsbedingungen herrschenden Reibungs- und Druckverhältnissen im Wegeventil 10.The smaller spool 32 is larger than that Designed valve opening 24 of the smaller seat body 20, likewise, the large control piston 34 takes up a larger area than the valve opening 22 of the large seat body 18. The Area differences result taking into account the Function of the directional control valve 10 described below in Connection with those prevailing under operating conditions Friction and pressure conditions in the directional control valve 10.

In der dargestellten Grundstellung des Wegventils 10 strömt unter Betriebsdruck stehendes Druckmittel vom Druckmittelkanal P durch die Ventilöffnung 22 hindurch zu dem mit dem Druckmittelkanal A verbundenen Verbraucher. Eine Druckmittelverbindung zwischen dem Druckmittelkanal A und dem Rücklauf R ist von der am zweiten Sitzkörper 20 anliegenden Dichtscheibe 30 verschlossen. Aufgrund der Flächendifferenz zwischen der zweiten Ventilöffnung 24 und dem ersten Steuerkolben 32 ist gewährleistet, daß der Schieber 26 in dieser Schaltstellung verharrt, ohne daß der Steuerkolben 34 mit Betriebsdruck beaufschlagt ist.In the illustrated basic position of the directional valve 10 flows pressure medium under operating pressure from Pressure medium channel P through the valve opening 22 through the consumer connected to the pressure medium channel A. A Pressure medium connection between the pressure medium channel A and the return R is from that on the second seat body 20 adjacent sealing washer 30 closed. Due to the Area difference between the second valve opening 24 and the first control piston 32 ensures that the Slider 26 remains in this switching position without the Control piston 34 is acted upon by operating pressure.

Eine Umsteuerung des Wegeventils 10 in die nicht gezeichnete Schaltstellung erfolgt durch einen kurzzeitigen Druckimpuls auf den ersten Steuerkolben 32. Dadurch legt sich die erste Dichtscheibe 28 an den die erste Ventilöffnung 22 begrenzenden Bund des Sitzkörpers 18 an und unterbricht die Verbindung zwischen dem Druckmittelkanal P und dem Druckmittelkanal A. Gleichzeitig wird dabei der Druckmittelkanal A durch die Ventilöffnung 24 des zweiten Sitzkörpers 20 hindurch mit dem Druckmittelkanal R gekoppelt. Die aufgrund der Flächendifferenz zwischen der ersten Ventilöffnung 22 und dem Steuerkolben 32 erzeugte Druckkraft auf den Schieber 26 drückt die Dichtscheibe 28 gegen den Sitzkörper 18, wobei diese Druckkraft vom Betriebsdruck abhängig ist und mit steigendem Betriebsdruck zunimmt. Auch in dieser beschriebenen Schaltstellung sind die Steuerkammern 38, 40 drucklos.A reversal of the directional valve 10 in the not shown Switch position takes place by a brief pressure pulse on the first control piston 32. This causes the first to lie down Sealing disk 28 to which the first valve opening 22 limiting collar of the seat body 18 and interrupts the Connection between the pressure medium channel P and the Pressure medium channel A. At the same time the Pressure medium channel A through the valve opening 24 of the second Seat body 20 through with the pressure medium channel R coupled. The due to the area difference between the first valve opening 22 and the control piston 32 generated Pressing force on the slide 26 presses the sealing disk 28 against the seat body 18, this pressure force from Operating pressure is dependent and with increasing operating pressure increases. Are also in this switch position described the control chambers 38, 40 are depressurized.

Die Umsteuerung zurück in die dargestellte Grundstellung erfolgt ebenfalls durch einen kurzzeitigen Druckimpuls auf den Steuerkolben 34. Dessen Kolbenfläche ist größer als die Ventilöffnung 22 des ersten Sitzkörpers 18, wodurch die resultierende Druckkraft auf den Schieber 26 eine Rückstellung ermöglicht. Eine derartig arbeitendes Wegeventil 10 wird als Impulsventil oder als bistabiles Ventil bezeichnet.The reversal back to the basic position shown is also caused by a brief pressure pulse the control piston 34. Its piston area is larger than that Valve opening 22 of the first seat body 18, whereby the resulting compressive force on the slider 26 a Provision enabled. One that works Directional control valve 10 is used as a pulse valve or as a bistable Designated valve.

Die Beaufschlagung der Steuerkammern 38 und 40 mit Druckmittel zur Umsteuerung des Wegeventils 10 geschieht über im Gehäuse 12 angeordnete und in Figur 1 lediglich als strichpunktierte Linien angedeutete Steuerkanäle. Diese werden von einem in Figur 1 nicht erkennbaren Vorsteuerventil mit Druckmittel versorgt, wobei das Vorsteuerventil selbst über vom zulaufseitigen Druckmittelkanal P abzweigende Versorgungskanäle - nicht gezeichnet - angesteuert sein kann.The application of the control chambers 38 and 40 with Pressure medium for reversing the directional control valve 10 happens via arranged in the housing 12 and in Figure 1 only as dash-dotted lines indicated control channels. This are not recognizable by one in FIG Pilot valve supplied with pressure medium, the Pilot valve itself from the inlet side Supply channels branching off pressure medium channel P - not drawn - can be controlled.

Figur 2 zeigt eine Baueinheit 44 aus einer Grundplatte 46, einem Vorsteuerventil 48 und einer Ventileinheit 50. Letztere hat ein blockförmiges Gehäuse 52, das zusammen mit dem Vorsteuerventil 48 auf der Grundplatte 46 verankert ist. Diese Grundplatte 46 ist senkrecht zur Zeichenebene von druckmittelführenden Kanälen 54 durchzogen, über die die gemeinsame Ver- bzw. Entsorgung eventuell mehrerer nebeneinander angeordneter Baueinheiten 44 erfolgen kann. Im Ausführungsbeispiel ist die Grundplatte 46 mit Stichkanälen 56 versehen, die Druckmittelverbindungen zwischen den Anschlüssen der Ventileinheit 50 und den Kanälen 54 herstellen. Ferner weist die Grundplatte 46 einen durchgehenden Hohlraum 47 auf, in dem eine elektronische Steuereinrichtung 49 untergebracht ist. Diese steuert das Vorsteuerventil 48 elektronisch an.FIG. 2 shows a structural unit 44 consisting of a base plate 46, a pilot valve 48 and a valve unit 50. The latter has a block-shaped housing 52, which together with the pilot valve 48 is anchored on the base plate 46. This base plate 46 is perpendicular to the plane of the drawing pressure medium-carrying channels 54 through which the joint supply or disposal, possibly several adjacent units 44 can be done. In the exemplary embodiment, the base plate 46 is included Stub channels 56 provided the pressure medium connections between the connections of the valve unit 50 and the Create channels 54. Furthermore, the base plate 46 has one continuous cavity 47 in which an electronic Control device 49 is housed. This controls it Pilot valve 48 electronically.

Die Ventileinheit 50 hat 5/2-Wegefunktion und nimmt dazu in ihrem Gehäuse 52 zwei voneinander getrennte Wegeventile 58 und 60 auf. Das Wegeventil 58 ist dabei identisch zum Wegeventil 10 nach Figur 1 aufgebaut. Demgegenüber hat das koaxial dazu liegende zweite Wegeventil 60 einen Schieber 64, dessen Kolben 66 mit den Sitzkörpern 68 und 70 ein sogenanntes innendichtendes Ventil bildet. Bei innendichtenden Ventilen sind die, die Ventilöffnungen 72 und 74 umgebenden Bunde der Sitzkörper 68, 70, im Gegensatz zu außendichtenden Systemen nach Figur 1, auf den einander zugewandten Innenseiten dieser Sitzkörper 68, 70 angeordnet. Dementsprechend befinden sich auch die Kolben 66 mit ihren Dichtscheiben 78, 80 zwischen den beiden Sitzkörpern 68, 70 und nicht außerhalb davon. Um eine zum Wegeventil 58 (10) vergleichbare Funktion auch für das Wegeventils 60 zu erreichen, wurden die Flächenverhältnisse der Steuerkolben 82 und 84 bzw. der Sitzkörper 68, 70 beibehalten und die Zuordnung der Steuerkolben 82, 84 zu den Sitzkörpern 68, 70 verändert. Demzufolge liegt dem im Durchmesser kleineren Steuerkolben 82 nun der Sitzkörper 68 mit der kleinen Ventilöffnung 72 benachbart, während entsprechend der Steuerkolben 84 mit der großen Ventilöffnung 74 dem Sitzkörper 70 zugeordnet ist. Aus fertigungstechnischen Gründen sind beide Steuerkolben 82 und 84 mehrteilig mit dem Schieber 64 ausgeführt. Unterschiedlich gegenüber dem Wegeventil 58 (10) ist ferner, daß nun der die Verbindung vom zulaufseitigen Druckmittelkanal P zum zweiten verbraucherseitigen Druckmittelkanal B vom Sitzkörper 68 mit der kleineren Ventilöffnung 72 gesteuert ist, während bei der Druckmittelverbindung zwischen dem Druckmittelkanal B und R entsprechend umgekehrte Verhältnisse vorliegen.The valve unit 50 has a 5/2-way function and does so its housing 52 has two separate directional valves 58 and 60 on. The directional control valve 58 is identical to Directional valve 10 constructed according to Figure 1. In contrast, that has Coaxial second directional valve 60 a slide 64, the piston 66 with the seat bodies 68 and 70 so-called inner sealing valve forms. At internally sealing valves are the valve openings 72 and 74 surrounding bundles of seat bodies 68, 70, in contrast to external sealing systems according to Figure 1, on each other facing inner sides of this seat body 68, 70 arranged. Accordingly, the pistons 66 are located with their Sealing discs 78, 80 between the two seat bodies 68, 70 and not outside of it. To one to directional valve 58 (10) comparable function for the directional control valve 60 too the area ratios of the control pistons 82 and 84 or the seat body 68, 70 maintained and the Assignment of the control pistons 82, 84 to the seat bodies 68, 70 changed. As a result, it is smaller in diameter Control piston 82 now the seat body 68 with the small one Valve opening 72 adjacent, while corresponding to the Control piston 84 with the large valve opening 74 the Seat body 70 is assigned. From manufacturing technology Reasons are both control pistons 82 and 84 in several parts with the Slider 64 executed. Different from that Directional control valve 58 (10) is also that now the connection from the inlet-side pressure medium channel P to the second consumer-side pressure medium channel B from the seat body 68 with the smaller valve opening 72 is controlled while at the pressure medium connection between the pressure medium channel B and R are in the opposite order.

Durch die Kombination eines außendichtenden Wegeventils 58 mit einem fluchtend dazu angeordneten, innendichtenden Wegeventil 60 wird eine besonders preisgünstige Ausbildung des Gehäuses 52 mit einer einzigen, durchgehenden Schieberbohrung 53 erreicht. Auch die Anordnung der Steuerkanäle in diesem Gehäuse 52 ist verhältnismäßig einfach realisierbar. Diesbezüglich wird auf die Beschreibung zur Figur 3 verwiesen. By combining an outside sealing directional valve 58 with an inner seal aligned with it Directional control valve 60 is a particularly inexpensive training of the housing 52 with a single, continuous Slide bore 53 reached. Even the arrangement of the Control channels in this housing 52 is proportional easy to implement. In this regard, the Reference made to FIG. 3.

Nach Figur 3 sind im Gehäuse 52 unabhängig von der Ansteuerung mehrere Steuerkanäle 90a-e vorgesehen. Der Steuerkanal 90a stellt eine Druckmittelverbindung zwischen der Steuerkammer 96, in der im Ausführungsbeispiel die beiden kleinen Stellkolben 32, 82 gemeinsam angeordnet sind und dem Steuerkanal 90b her, der zum Vorsteuerventil 48 führt. Der zur Außenseite der Ventileinheit 50 hinführende Teil des Druckmittelkanals 90a ist nur aus fertigungstechnischen Gründen vorhanden und hat keine druckmittelführende Funktion. Er ist aus diesen Gründen nach außen verschlossen, beispielsweise durch einem nicht eingezeichneten Stopfen. Parallel zum Steuerkanal 90b verlaufend, verbindet ein weiterer Steuerkanal 90c das Vorsteuerventil 48 mit einem Abzweig des zulaufseitigen Druckmittelkanals P, der in die Schieberbohrung 53 des Wegeventils 58, 60 einmündet. Über diesen Steuerkanal 90c wird das Vorsteuerventil 48 mit Druckmittel versorgt. Zur Rückführung von Druckmittel aus dem Vorsteuerventil 48 ist ein Steuerkanal 90d vorgesehen, der ausgehend vom Vorsteuerventil 48 zu dem mit R bezeichneten rücklaufseitigen Druckmittelkanal des Wegeventils 60 führt. Die Steuerkanäle 90b-d verlaufen im wesentlichen parallel zur Schieberbohrung 53.According to FIG. 3, the housing 52 is independent of the Control several control channels 90a-e provided. The Control channel 90a establishes a pressure medium connection the control chamber 96, in which in the embodiment two small actuating pistons 32, 82 are arranged together and the control channel 90b that leads to the pilot valve 48 leads. The one leading to the outside of the valve unit 50 Part of the pressure medium channel 90a is only out manufacturing reasons exist and has none function carrying pressure medium. He is after for these reasons locked on the outside, for example not by one drawn plug. Parallel to the control channel 90b running, another control channel 90c connects this Pilot valve 48 with a branch of the inlet side Pressure medium channel P, which in the slide bore 53 of the Directional valve 58, 60 opens. Via this control channel 90c the pilot valve 48 is supplied with pressure medium. For Return of pressure medium from the pilot valve 48 is a control channel 90d is provided which, starting from the Pilot valve 48 to that labeled R. return-side pressure medium channel of the directional valve 60 leads. The control channels 90b-d are essentially parallel to slide bore 53.

Ein weiterer Steuerkanal 90e liegt auf der den Steuerkanälen 90a-d gegenüberliegenden Seite der Schieberbohrung 53 und verbindet die beiden außenliegenden Steuerkammern 40 und 100 der Wegeventile 58 und 60 miteinander. Zudem führt dieser Steuerkanal 90e ebenfalls zum Vorsteuerventil 48.Another control channel 90e lies on that of the control channels 90a-d opposite side of the slide bore 53 and connects the two external control chambers 40 and 100 the directional control valves 58 and 60 with each other. In addition, this leads Control channel 90e also to pilot valve 48.

Die in Figur 3 dargestellte Ventileinheit 50 wirkt entgegen dem Impulsventil nach Figur 2 als Umschaltventil mit Druckmittelrückstellung. Dazu ist die den beiden Wegeventilen 58 und 60 gemeinsame Steuerkammer 96 über die Steuerkanäle 90a und 90b permanent mit Betriebsdruck beaufschlagt. Die dadurch auf die Steuerkolben 32 und 82 einwirkende Druckkraft verbringt die beiden Wegeventile 58, 60 in die dargestellte Grundstellung. Für die Umsteuerung der Ventileinheit 50 werden die außenliegenden Steuerkammern 40 und 100 der beiden Wegeventile 58, 60 ebenfalls mit Betriebsdruck beaufschlagt. Dies erfolgt durch das Vorsteuerventil 48 über den Steuerkanal 90e. Die von den Steuerkolben 34 und 84 der Wegeventile 58 und 60 hervorgerufene Druckkraft ist infolge der unterschiedlich großen druckbeaufschlagten Flächen größer als die von den im Durchmesser kleineren Steuerkolben 32, 82 aufgebrachte Gegenkraft. Bei der Ausführung als Umschaltventil können die an diesen Stellkolben 32 und 82 vorgesehenen Dichtringe 36 ersatzlos entfallen. Dadurch kann ein Druckaufbau in der Steuerkammer 96 auch über die Führungsspalte dieser Stellkolben 32 und 82 stattfinden. Die Steuerkanäle 90a oder 90b werden in diesem Fall nicht benötigt.The valve unit 50 shown in FIG. 3 counteracts the pulse valve according to Figure 2 as a changeover valve Pressure fluid provision. That's the two of them Directional control valves 58 and 60 common control chamber 96 over the Control channels 90a and 90b permanently with operating pressure acted upon. This results in the control pistons 32 and 82 the two directional valves 58, 60 in the basic position shown. For reversal the valve unit 50 become the external control chambers 40 and 100 of the two way valves 58, 60 also with Operating pressure applied. This is done by the Pilot valve 48 via the control channel 90e. The one from the Control pistons 34 and 84 of directional control valves 58 and 60 The pressure force caused is different due to the large pressurized areas larger than that of the Diameter smaller control piston 32, 82 applied Drag. When running as a changeover valve, the on these adjusting pistons 32 and 82 provided sealing rings 36 omitted without replacement. This can build up pressure in the Control chamber 96 also through the guide column of this Actuating pistons 32 and 82 take place. The control channels 90a or 90b are not required in this case.

Die Rückstellung erfolgt druckmittelgesteuert, indem die außenliegenden Steuerkammern 40, 100 über die Steuerkanäle 90d und 90e zum rücklaufseitigen Druckmittelkanal R druckentlastet werden. Dadurch kann die nach wie vor unter Betriebsdruck stehende Steuerkammer 96 zusammen mit den kleinen Steuerkolben 32, 82 die Wegeventile 58 und 60 in die Grundstellung zurückstellen.The pressure is controlled by the external control chambers 40, 100 via the control channels 90d and 90e to the pressure medium channel R on the return side be relieved of pressure. As a result, the can still be under Operating pressure control chamber 96 together with the small control piston 32, 82, the directional control valves 58 and 60 in the Reset basic position.

Die Ventileinheit 50 wirkt im Gegensatz zum bistabilen Impulsventil des Ausführungsbeispiels nach Figur 2 als reines Umschaltventil bzw. monostabiles Ventil, bei dem in wenigstens einer der Steuerkammern 40, 96, 100 permanent Betriebsdruck anliegt.The valve unit 50 acts in contrast to the bistable Pulse valve of the embodiment of Figure 2 as pure changeover valve or monostable valve, in which at least one of the control chambers 40, 96, 100 permanent Operating pressure is present.

Die Ventileinheit 50 kann, wie Figur 4 zeigt, auch als Umschaltventil mit mechanischer Rückstellung ausgeführt werden. Im Unterschied zu Figur 3 ist dabei die, beiden Wegeventilen 58 und 60 gemeinsame, Steuerkammer 96 nicht druckmittelbeaufschlagt. Die Steuerkanäle 90a und 90b werden dazu verschlossen, beispielsweise durch das Einpressen eines Dichtstopfens. Zudem ist die Steuerkammer 96 mittels einer Verbindung zum Druckmittelkanal R oder zur Umgebung entlüftet. Zwischen die beiden Steuerkolben 32 und 82 ist eine Druckfeder 102 eingespannt. Diese drückt die beiden Schieber 26 und 64 der Wegeventile 58, 60 in die gezeichnete Grundstellung und ist so dimensioniert, daß die bei einer eventuellen Druckbeaufschlagung der Steuerkammern 40, 100 von den Steuerkolben 34, 84 erzeugten Druckkräfte ausreichen um ihre Vorspannung zu überwinden.The valve unit 50 can, as shown in FIG. 4, also as Changeover valve with mechanical reset become. In contrast to Figure 3, the two Directional control valves 58 and 60 common, control chamber 96 not pressurized. The control channels 90a and 90b are closed, for example by pressing a Sealing plug. In addition, the control chamber 96 is by means of a Connection to the pressure medium channel R or to the environment vented. Is between the two control pistons 32 and 82 a compression spring 102 is clamped. This presses the two Slider 26 and 64 of the directional valves 58, 60 in the drawn Home position and is dimensioned so that the one possible pressurization of the control chambers 40, 100 pressure forces generated by the control pistons 34, 84 are sufficient to overcome their bias.

Figur 5 zeigt eine Bauvariante einer Ventileinheit 50, bei der die beiden Wegeventile 58 und 60 nicht koaxial, sondern parallel zueinander im Gehäuse 52 angeordnet sind. Dabei verlaufen die Längsachsen der Wegeventile 58, 60 senkrecht zur Auflagefläche der Ventileinheit 50 an der Grundplatte 46. Die beiden Wegeventile 58, 60 sind, abgesehen von einer zweigeteilten Ausbildung der Schieberbohrung 53a und 53b im Gehäuse 52, identisch zu denen der vorigen Ausführungsbeispiele ausgeführt. Bei den Schieberbohrungen 53a und 53b handelt es sich um durchgehende Querbohrungen im Gehäuse 52, die an ihrem einen Ende von der Grundplatte 46 und am gegenüberliegenden zweiten Ende von Stopfen 104 verschlossen sind.Figure 5 shows a variant of a valve unit 50, at the two directional control valves 58 and 60 are not coaxial, but are arranged parallel to one another in the housing 52. Here the longitudinal axes of the directional control valves 58, 60 run vertically to the contact surface of the valve unit 50 on the base plate 46. The two directional valves 58, 60 are, apart from one two-part design of the slide bore 53a and 53b in Housing 52, identical to that of the previous Embodiments executed. With the slide bores 53a and 53b are continuous cross holes in the Housing 52, which at one end of the base plate 46th and at the opposite second end of plug 104 are closed.

Die Druckmittelkanäle P und R verlauten im rechten Winkel zu den Schieberbohrungen 53a,b in Richtung des Vorsteuerventils 48. Sie verbinden die Schieberborhungen 53a und 53b miteinander und enden sacklochartig in der Schieberbohrung 53a. Gleiches gilt für die zu den Steuerkammern 96a,b, 40 und 100 führenden Steuerkanäle 90a und 90e. Auch die Druckmittelkanäle A und B sind senkrecht zu den Schieberbohrungen 53a,b ausgerichtet, sind aber im Unterschied zu den Druckmittelkanälen P und R nicht miteinander gekoppelt, sondern verlaufen zu einander entgegengesetzten Außenseiten des Gehäuses 52, wo sie von eingepreßten Kugeln 106 druckdicht verschlossen sind. Parallel zu den Schieberbohrungen 53a,b ausgerichtete Längskanäle 108 stellen eine Verbindung der Druckmittelkanäle A,B zu umfangseitigen Anschlüssen 110 her. Diese Anschlüsse 110 können alternativ an der Grundplatte 46 oder am Gehäuse 52 vorgesehen werden.The pressure medium channels P and R are at a right angle the slide bores 53a, b in the direction of the pilot valve 48. They connect the slide bores 53a and 53b with each other and end in a blind hole in the slide hole 53a. The same applies to the control chambers 96a, b, 40 and 100 leading control channels 90a and 90e. Also the Pressure medium channels A and B are perpendicular to the Slider bores 53a, b aligned, but are in the No difference to the pressure medium channels P and R. coupled with each other, but run to each other opposite outer sides of the housing 52, where they from pressed balls 106 are closed pressure-tight. Aligned parallel to the slide bores 53a, b Longitudinal channels 108 connect the Pressure medium channels A, B to circumferential connections 110. These connections 110 may alternatively be on the base plate 46 or be provided on the housing 52.

Mit dieser Bauvariante läßt sich eine besonders kompakte Bauweise einer Ventileinheit 50 realisieren, deren Gehäuse 52 aufgrund der rechtwinkligen Kanalführung ebenfalls relativ einfach herstellbar ist.This construction variant makes it particularly compact Realize the construction of a valve unit 50, its housing 52 due to the right-angled ducting is relatively easy to manufacture.

Ergänzend zeigt Figur 6 eine mit einem Vorsteuerventil 48 gekoppelte Ventileinheit 50 mit ebenfalls zweigeteilter, paralleler Anordnung der Schieberbohrungen 53a,b. Beide Schieberbohrungen 53a,b verlaufen hier im Unterschied zum Ausführungsbeispiel nach Figur 5 in Längs- und nicht in Querrichtung zum Gehäuse 52. Die Druckmittelanschlüsse A und B lassen sich dadurch in vorteilhafter Weise an der vom Vorsteuerventil 48 abgewandten Stirnfläche der Ventileinheit 50 anordnen. Die verschiedenen Steuerkanäle, die in Figur 6 nur schematisch anhand von gestrichelten Linien angedeutet sind, sind auch bei dieser Variante in Längs- oder Querrichtung zum Gehäuses 52 geführt. Um Wiederholungen in bezug auf ihre Funktion zu vermeiden wird auf die vorigen Erläuterungen hierzu verwiesen.In addition, FIG. 6 shows one with a pilot valve 48 coupled valve unit 50 with likewise two-part, parallel arrangement of the slide bores 53a, b. Both Slider bores 53a, b run here in contrast to Embodiment according to Figure 5 in longitudinal and not in Transverse direction to the housing 52. The pressure medium connections A and B can be advantageously in the on Pilot valve 48 facing away from the end face of the valve unit Arrange 50. The various control channels shown in Figure 6 only schematically indicated by dashed lines are also in this variant in longitudinal or Transverse direction to the housing 52. To repeat in Avoiding their function will be on the previous ones Explanations referenced.

Die erläuterten Ausfühmungsbeispiele nach den Figuren 2 bis 6 offenbaren eine große Bandbreite verschiedener Ausführungsvarianten für Ventileinheiten 50 mit 5/2-Wegventilfunktion, die im wesentlichen aus zwei der Erfindung zugrundeliegenden Typen von Wegeventilen 58, 60 aufgebaut sind. Alle offenbarten Ventileinheiten 50 haben eine große Anzahl von Gleichteilen und sind zumindest teilweise durch einfache konstruktive Eingriffe ineinander überführbar. Das der Erfindung zugrundeliegende Bauprinzip von Wegeventilen 10, 58, 60 läßt sich demnach zu einem Ventil-Baukastensystem erweitern, mit dem ohne nennenswerten technischen Aufwand verschiedenste Kundenwünsche realisierbar sind.The illustrated exemplary embodiments according to FIGS. 2 to 6 reveal a wide range of different Design variants for valve units 50 with 5/2-way valve function, which essentially consist of two of the Types of directional valves 58, 60 on which the invention is based are built up. All of the disclosed valve units 50 have a large number of identical parts and are at least partly through simple constructive interventions transferable. The construction principle on which the invention is based of directional valves 10, 58, 60 can therefore be one Extend the modular valve system with which no significant technical effort various customer requests are realizable.

Figur 7 zeigt das Schaltsymbol für eine Ventileinheit 50, in der Ausführungsform nach Ausführungsbeispiel 2. Gemäß diesem Schaltsymbol erfolgt die Umschaltung der Ventileinheit 50 in ihre beiden Schaltstellungen mittels elektropneumatisch betätigten Vorsteuerventilen 48. Die Ventileinheit 50 weist insgesamt fünf mit P,R,A und B bezeichnete Anschlüsse auf, die der Einfachheit halber von 1 bis 5 durchnumeriert sind. Anschluß 1 oder P ist mit einem nicht gezeichneten Druckerzeuger verbunden, Anschluß 2 mit dem Verbraucher A, die Anschlüsse 3 und 5 mit einem Rücklauf R und der Anschluß 4 mit dem zweiten Verbraucher B. In der ersten Schaltstellung sind die Anschlüsse 1 und 2 bzw. 4 und 5 miteinander verbunden, in der zweiten Schaltstellung ist Anschluß 1 mit Anschluß 4 und Anschluß 2 mit Anschluß 3 kontaktiert. Anschluß 3 ist in Schaltstellung 1 und Anschluß 5 in Schaltstellung 2 gesperrt.FIG. 7 shows the circuit symbol for a valve unit 50, in the embodiment according to embodiment 2. According to this Switch symbol the valve unit 50 is switched over their two switching positions by means of electropneumatic actuated pilot valves 48. The valve unit 50 has a total of five connections labeled P, R, A and B, which are numbered 1 to 5 for simplicity. Port 1 or P is with a not shown Pressure generator connected, port 2 to consumer A, the connections 3 and 5 with a return R and the connection 4 with the second consumer B. In the first Switch positions are connections 1 and 2 or 4 and 5 connected to each other, is in the second switching position Port 1 with port 4 and port 2 with port 3 contacted. Port 3 is in switch position 1 and port 5 locked in switch position 2.

Selbstverständlich sind Änderungen oder Ergänzungen am beschriebenen Ausführungsbeispiel möglich, ohne vom Grundgedanken der Erfindung abzuweichen.Of course, changes or additions to the described embodiment possible without Deviate basic ideas of the invention.

Claims (10)

Vorsteuerbares Wegeventil (10, 58, 60) mit einem Gehäuse (12, 52), in dem zur Steuerung von Druckmittelverbindungen zwischen einem, dem Zulauf zugeordneten Druckmittelkanal (P), wenigstens einem, dem Rücklauf zugeordneten Druckmittelkanal (R) und wenigstens einem, dem Verbraucher zugeordneten Druckmittelkanal (A, B) ein mit Sitzkörpern (18, 20, 68, 70) zusammenwirkendes Schließglied (26, 64) verschiebbar geführt ist, das zur Umsteuerung des Wegeventils (10, 58, 60) von der Grund- in die Schaltstellung mit zwei einander gegenüberliegenden Steuerkolben (32, 34, 82, 84) unterschiedlich großer Kolbenflächen ausgestattet ist, dadurch gekennzeichnet, daß jedem Steuerkolben (32, 34, 82, 84) eine Steuerkammer (38, 40, 96, 100) zugeordnet ist, daß die Sitzkörper (18, 20 und 68, 70) unterschiedlich große Ventilöffnungen (22, 24, 72, 74) aufweisen und daß zur Ausbildung eines außendichtenden Systems, bei dem die voneinander abgewandt liegenden Stirnflächen der Sitzkörper (18, 20) mit dem Schließglied (26) zusammenwirken, der Sitzkörper (18, 20), der eine Druckmittelverbindung zwischen den Druckmittelkanälen (P) und (A) steuert, die größere Ventilöffnung (22) aufweist und benachbart zum Steuerkolben (32) mit der kleineren Kolbenfläche liegt.Pilot controllable directional valve (10, 58, 60) with a housing (12, 52) in which to control pressure medium connections between a pressure medium channel (P) assigned to the inlet, at least one pressure medium channel (R) assigned to the return and at least one, the Consumer-associated pressure medium channel (A, B) is displaceably guided by a closing element (26, 64) which interacts with seat bodies (18, 20, 68, 70) and which is used to reverse the directional control valve (10, 58, 60) from the basic to the switching position is equipped with two opposing control pistons (32, 34, 82, 84) of differently sized piston surfaces, characterized in that each control piston (32, 34, 82, 84) is assigned a control chamber (38, 40, 96, 100) that the seat bodies (18, 20 and 68, 70) have valve openings (22, 24, 72, 74) of different sizes and that to form an external sealing system in which the end faces of the seat bodies (18, 20 ) interact with the closing member (26), the seat body (18, 20), which controls a pressure medium connection between the pressure medium channels (P) and (A), has the larger valve opening (22) and is adjacent to the control piston (32) with the smaller piston area lies. Vorsteuerbares Wegeventil (10, 58, 60) mit einem Gehäuse (12, 52), in dem zur Steuerung von Druckmittelverbindungen zwischen einem dem Zulauf zugeordneten Druckmittelkanal (P), wenigstens einem dem Rücklauf zugeordneten Druckmittelkanal (R) und wenigstens einem dem Verbraucher zugeordneten Druckmittelkanal (A, B) ein mit Sitzkörpern (18, 20, 68, 70) zusammenwirkendes Schließglied (26, 64) verschiebbar geführt ist, das zur Umsteuerung des Wegeventils (10, 58, 60) von seiner Grund- in die Schaltstellung bzw. umgekehrt mit zwei einander gegenüberliegenden Steuerkolben (32, 34, 82, 84) unterschiedlich großer Kolbenflächen ausgestattet ist, dadurch gekennzeichnet, daß jedem Steuerkolben (32, 34, 82, 84) eine Steuerkammer (38, 40, 96, 100) zugeordnet ist, daß die beiden Sitzkörper (18, 20 und 68, 70) unterschiedlich große Ventilöffnungen (22, 24, 72, 74) aufweisen und daß zur Ausbildung eines innendichtenden Systems, bei dem die einander zugewandten Stirnflächen der Sitzkörper (68, 70) mit dem Schließglied (64) zusammenwirken, der Sitzkörper (68), der eine Druckmittelverbindung zwischen den Druckmittelkanälen (P) und (B) steuert die kleinere Ventilöffnung (72) aufweist und benachbart zum Steuerkolben (82) mit der kleineren Kolbenfläche liegt.Pilot controllable directional valve (10, 58, 60) with a housing (12, 52) in which to control pressure medium connections between a pressure medium channel (P) assigned to the inlet, at least one pressure medium channel (R) assigned to the return and at least one pressure medium channel assigned to the consumer (A, B) a closing element (26, 64), which cooperates with seat bodies (18, 20, 68, 70), is displaceably guided, which for reversing the directional control valve (10, 58, 60) from its basic to the switching position or vice versa is equipped with two opposing control pistons (32, 34, 82, 84) of differently sized piston surfaces, characterized in that each control piston (32, 34, 82, 84) is assigned a control chamber (38, 40, 96, 100) that the two seat bodies (18, 20 and 68, 70) have valve openings (22, 24, 72, 74) of different sizes and that to form an inner sealing system in which the mutually facing end faces of the seat body he (68, 70) cooperate with the closing member (64), the seat body (68), which controls a pressure medium connection between the pressure medium channels (P) and (B), has the smaller valve opening (72) and is adjacent to the control piston (82) with the smaller piston area. Vorsteuerbare Ventileinheit (50) mit einem Gehäuse (52) in dem wenigstens zwei vorsteuerbare Wegeventile (10, 58, 60) nach einem der Ansprüche 1 und/oder 2 mit Hilfe ihrer Schließglieder (26, 64) Druckmittelverbindungen zwischen Druckmittelkanälen (P, R, A, B) steuern.Pilot controllable valve unit (50) with a housing (52) in which at least two pilot-controlled directional valves (10, 58, 60) according to one of claims 1 and / or 2 with the help of Locking members (26, 64) pressure medium connections between Control pressure medium channels (P, R, A, B). Vorsteuerbare Ventileinheit nach Anspruch 3, dadurch gekennzeichnet, daß die Schließglieder (26, 64) in einer gemeinsamen Schieberbohrung (53) fluchtend zueinander angeordnet sind.Pilot controllable valve unit according to claim 3, characterized characterized in that the closing members (26, 64) in one common slide bore (53) in alignment with each other are arranged. Vorsteuerbare Ventileinheit nach Anspruch 3, dadurch gekennzeichnet, daß die Schließglieder (26, 64) parallel zueinander in zwei Schieberbohrungen (53a, 53b) angeordnet sind.Pilot controllable valve unit according to claim 3, characterized characterized in that the closing members (26, 64) are parallel arranged in two slide bores (53a, 53b) are. Vorsteuerbare Ventileinheit nach einem der Ansprüche Anspruch 3 bis 5, dadurch gekennzeichnet, daß im gemeinsamen Gehäuse (52) Steuerkanäle (90a, 90b) vorgesehen sind, die eine Druckmittelverbindung zwischen dem Vorsteuerventil (48) und der die kleineren Steuerkolben (32, 82) aufnehmenden Steuerkammer (96) schaffen, daß weitere Steuerkanäle (90c) den zulaufseiteigen Druckmittelkanal (P) mit dem Vorsteuerventil (48) verbinden und daß Steuerkanäle (90e) das Vorsteuerventil (48) mit den Steuerkammern (40, 100) der größeren Steuerkolben (32, 34) koppeln.Pilot controllable valve unit according to one of the claims Claims 3 to 5, characterized in that in common Housing (52) control channels (90a, 90b) are provided, the a pressure medium connection between the pilot valve (48) and the smaller control pistons (32, 82) Control chamber (96) create additional control channels (90c) the inlet-side pressure medium channel (P) with the Connect pilot valve (48) and that control channels (90e) the pilot valve (48) with the control chambers (40, 100) Couple the larger control piston (32, 34). Vorsteuerbare Ventileinheit nach Anspruch 6, dadurch gekennzeichnet, daß die Ventileinheit (50) als Impulsventil ausgeführt ist, indem das Vorsteuerventil (48) die Steuerkammer (96) bzw. die Steuerkammern (40, 100) über die Steuerkanäle (90b bzw. 90e) im Wechsel mit Druckimpulsen beanfachlagt.Pilot controllable valve unit according to claim 6, characterized characterized in that the valve unit (50) as a pulse valve is carried out by the pilot valve (48) Control chamber (96) or the control chambers (40, 100) via the Control channels (90b or 90e) alternating with pressure pulses claims. Vorsteuerbare Ventileinheit nach Anspruch 6, dadurch gekennzeichnet, daß die Ventileinheit (50) als vom Druckmittel rückstellbares Umschaltventil ausgeführt ist, indem das Vorsteuerventil (48) die Steuerkammer (96) permanent und im Falle der Umschaltung die Steuerkammern (40, 100) zeitweise mit Steuerdruck beaufschlagt.Pilot controllable valve unit according to claim 6, characterized characterized in that the valve unit (50) as of Pressure medium resettable changeover valve is executed, by the pilot valve (48) the control chamber (96) permanent and in the case of switching the control chambers (40, 100) temporarily charged with control pressure. Vorsteuerbare Ventileinheit nach Anspruch 6, dadurch gekennzeichnet, daß die Ventileinheit (50) als mechanisch rückstellbares Umschaltventil ausgeführt ist, indem die Steuerkammer (96) druckentlastet ist und eine Druckfeder (102) aufnimmt, die sich an den beiden kleineren Steuerkolben (32, 82) abstützt und deren Druckkraft den von den Steuerkammern (40, 100) erzeugten Druckkräften entgegenwirkt.Pilot controllable valve unit according to claim 6, characterized characterized in that the valve unit (50) as mechanical resettable changeover valve is designed by the Control chamber (96) is depressurized and a compression spring (102) records the two smaller ones Control piston (32, 82) supports and the pressure force of the the control chambers (40, 100) generated pressure forces counteracts. Vorsteuerbare Ventileinheit nach einem der Ansprüche 3 bis 9, dadurch gekennzeichnet, daß die Ventileinheit (50) einen doppelt wirkenden, pneumatischen Verbraucher ansteuert.Pilot controllable valve unit according to one of claims 3 to 9, characterized in that the valve unit (50) a double-acting, pneumatic consumer controls.
EP19990126259 1999-03-06 1999-12-31 Pilot-operated multiway valve Expired - Lifetime EP1035331B1 (en)

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DE1999109918 DE19909918A1 (en) 1999-03-06 1999-03-06 Pilot-operated directional valve
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1236938A1 (en) * 2001-02-26 2002-09-04 Rexroth Mecman GmbH Multiple way valve with parallel valve bores
WO2006065801A1 (en) * 2004-12-15 2006-06-22 Actuant Corporation Direct acting zero leak 4/3 tandem center neutral valve
WO2018114597A1 (en) * 2016-12-21 2018-06-28 Robert Bosch Gmbh Valve device
CN110878847A (en) * 2019-12-13 2020-03-13 瑞立集团瑞安汽车零部件有限公司 Low output device is got to fluid valve
EP3845767A1 (en) * 2019-12-30 2021-07-07 Danfoss Power Solutions Aps Valve arrangement and valve group

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004020794B4 (en) * 2004-04-28 2006-02-09 Bosch Rexroth Ag Pilot operated 4/3-way valve

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103866A (en) 1991-02-22 1992-04-14 Foster Raymond K Poppet valve and valve assemblies utilizing same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3175581A (en) * 1962-09-04 1965-03-30 Modernair Corp Multi-way poppet valve
US3608587A (en) * 1969-08-06 1971-09-28 Ross Operating Valve Co Single spindle four-way valve
DE3322912A1 (en) * 1983-06-25 1985-01-03 Wabco Steuerungstechnik GmbH & Co, 3000 Hannover Multi-way seat valve
GB2168789B (en) * 1984-12-24 1988-08-17 Ross Operating Valve Co Improved inline poppet valve

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103866A (en) 1991-02-22 1992-04-14 Foster Raymond K Poppet valve and valve assemblies utilizing same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1236938A1 (en) * 2001-02-26 2002-09-04 Rexroth Mecman GmbH Multiple way valve with parallel valve bores
US6688332B2 (en) 2001-02-26 2004-02-10 Rexroth Mecman Gmbh Multiway valve for switching a flow of fluid under pressure with parallel disposition of valve bores, and valve assembly kit
WO2006065801A1 (en) * 2004-12-15 2006-06-22 Actuant Corporation Direct acting zero leak 4/3 tandem center neutral valve
WO2018114597A1 (en) * 2016-12-21 2018-06-28 Robert Bosch Gmbh Valve device
CN110878847A (en) * 2019-12-13 2020-03-13 瑞立集团瑞安汽车零部件有限公司 Low output device is got to fluid valve
EP3845767A1 (en) * 2019-12-30 2021-07-07 Danfoss Power Solutions Aps Valve arrangement and valve group
WO2021136691A1 (en) * 2019-12-30 2021-07-08 Danfoss Power Solutions Aps Valve arrangement and valve group
US11965532B2 (en) 2019-12-30 2024-04-23 Danfoss Power Solutions Aps Valve arrangement and valve group

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DE19909918A1 (en) 2000-09-14
EP1035331B1 (en) 2007-01-10
DE59914148D1 (en) 2007-02-22

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