EP0900963A1 - Seat valve - Google Patents

Seat valve Download PDF

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Publication number
EP0900963A1
EP0900963A1 EP98108827A EP98108827A EP0900963A1 EP 0900963 A1 EP0900963 A1 EP 0900963A1 EP 98108827 A EP98108827 A EP 98108827A EP 98108827 A EP98108827 A EP 98108827A EP 0900963 A1 EP0900963 A1 EP 0900963A1
Authority
EP
European Patent Office
Prior art keywords
seat
closing
sleeve
seat valve
closing member
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
EP98108827A
Other languages
German (de)
French (fr)
Other versions
EP0900963B1 (en
Inventor
Martin Heusser
Anton Estendorfer
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.)
Hawe Hydraulik GmbH and Co KG
Original Assignee
Heilmeier and Weinlein Fabrik fuer Oel Hydraulik GmbH and Co KG
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Publication of EP0900963A1 publication Critical patent/EP0900963A1/en
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Publication of EP0900963B1 publication Critical patent/EP0900963B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—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
    • F15B13/0405—Valve members; Fluid interconnections therefor for seat valves, i.e. poppet 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
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • 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
    • F15B2013/041—Valve members; Fluid interconnections therefor with two positions

Definitions

  • the invention relates to a seat valve specified in the preamble of claim 1 Art.
  • Such seat valves known from prior use in practice, as a rule Black / white valves have a switching magnet as the adjustment drive, which Locking element adjusted against a spring.
  • 2/2-way seat valve are the two ways from each other in the locking position of the locking member Cut; in the through position of the closing member, however, with each other connected.
  • the lock for holding the locking element in the shut-off position is formed by the switching magnet and the spring.
  • a change seat valve is known, the two closing members are coupled via a pivotally mounted connecting lever in the housing.
  • the connecting lever carries a control cam with a vertex.
  • One in Ball with linear movement and loaded by a compression spring rests on the control cam.
  • the locking is structurally complex and stressed lots of installation space.
  • the adjustment shaft carries of the closing member a ball, which during the opening or closing movement of the Closing member between two spring-loaded, counteracting sliding elements is squeezed through.
  • the invention has for its object a seat valve of the type mentioned to create that structurally simple, inexpensive to manufacture and with low energy consumption adjustable and yet lockable with high force.
  • the adjustment drive can remain ineffective or be switched off because the latching the closing member in the shut-off position holds. Because with a seat valve, a leak-free shut-off position has a certain shut-off position holding force required, the mechanical, positive and non-positive Then the catch will not be in a weak or relaxed position, but in an intermediate position in which they hold the locking member with the blocking position presses and holds against the valve seat. The holding force is determined by the frictional connection the latching in interaction with the form closure.
  • the latch leaves integrate themselves into the seat valve in a structurally simple manner is simple and inexpensive. Since the adjustment drive only for initiating one Adjustment is needed, the seat valve can be used with little energy and therefore adjust with a simple and inexpensive adjustment drive.
  • angles of approximately 45 ° are according to claim 3 for both adjustment directions achieved essentially symmetrical force ratios.
  • the lock from the working area of the locking member relocated.
  • the straight passive latching does not produce a disruptive counterforce for active locking.
  • the closing member is in the adjustment supports the two catches in the respective adjustment direction. The adjustment drive only needs to generate the adjustment pulse.
  • the manufacture and assembly of the seat valve are simplified.
  • the latching can be accommodated well, without such proven training concepts Affect seat valves.
  • the latching is an adjusting auxiliary drive for the closing element, which largely relieves the actual adjustment drive.
  • a seat valve S in Fig. 1 e.g. a 2/2-way seat valve, has a in a housing 1 Venitilsitz 2 to cooperate with a locking member 3, which deals with a seat 3a can be placed on the valve seat 2.
  • the valve seat 2 is between flow paths A, C provided. In the shown shut-off position of the seat valve S is the Connection between paths A, C broken.
  • an adjustment drive 5, 7 is provided which with the closing member 3 is connected, for example, via the elements 4, 6.
  • An axial force holds in the direction of the dashed arrow or a shut-off position holding scratch Z. the closing member 3 in the shut-off position.
  • a force in the direction of the extended, upward arrow moves the closing member 3 to the open position.
  • the adjustment drive 5, 7, which is, for example, in two parts, can either be operated manually operate or consists of switching magnets or is operated by a hydraulic or pneumatic pilot control.
  • the seat valve S is in the shut-off position shown by a mechanical, form and scratch-tight latching R held.
  • An element 8 is in the latching two oppositely sloping cam surfaces N1 and N2, e.g. provided on part 4.
  • the cam surfaces N1 and N2 are acted upon by a cam member F, which is loaded by a spring G.
  • the cam member F produces thanks to the shape and Force closure and the force of the spring G, the blocking position holding force Z for the Locking member 3, since the locking R of the locking member 3, at least in the shut-off position, is prevented from reaching a relaxed position.
  • the adjustment drive 5, 7 actuated in the direction of the upward-pointing, drawn arrow, then the latch R is released and the cam follower F from the cam surface N1 brought to the cam surface N2, whereby the closing member 3 in the open position held and then optionally with an upward Force is applied.
  • the adjustment drive 5, 7 is because the latching R as an adjustment auxiliary drive acts in both adjustment directions, only required as an adjustment pulse generator I2, I1, to initiate an adjustment of the seat valve S, which then runs automatically, until a stable position of the closing element is reached again. That is how it is Seat valve S is bistable even without the involvement of the adjustment drive, i.e. that it is in the respective locked position of the locking member remains until new, in the opposite direction acting adjustment pulse is initiated.
  • a 3/2-way seat valve S is shown in a symbolic representation, which alternately creates the connection between two paths C, B or C, A and thereby the connection to the third path A or B.
  • Two are used as adjusting drives 5, 7
  • Switching magnets with opposite directions of action which may only be adjustable pulse generators Form I1 and I2 because the poppet valve with a mechanical catch R is equipped, which in the two shut-off positions of this seat valve S the Closing member holds with axial holding force.
  • the structure of the seat valve according to FIG. 2 is indicated in FIG. 3, partly in section.
  • the two switching magnets 5, 7 are then energized via connections 9, if the seat valve S is to be adjusted.
  • the switching magnets are adjustable pulse generators and can be switched off or de-energized after the adjustment.
  • the housing 1 In the housing 1 is in a housing bore 10 equipped with the locking R cartridge-like insert 11 housed, which contains the closing member 3, which means the switching magnet M1, M2 of the adjustment drive 5, 7 can be moved back and forth.
  • the stroke of the seat valve is indicated by X and is relatively small. For example, it is only a few 1/10 mm, e.g. 0.5 mm.
  • the elements 4, 6 are plungers with which the Switching magnet transmit the respective adjustment pulse to the closing element 3.
  • Fig. 4 the cartridge-shaped insert 11 is enlarged in the housing bore 10 and shown in longitudinal section.
  • the closing member 3, which in the embodiment shown is arranged on an adjustment shaft 3 ', in a two-part sleeve 12a, 12b linearly adjusted.
  • a valve seat 2a, 2b is formed in each sleeve part 12a, 12b.
  • the two valve seats 2a, 2b mutually cooperate with the seat surfaces 3a1 and 3a2 of the closing member 3 in order (see symbol in FIG.
  • the catch R is contained in the cartridge-shaped insert 11.
  • the mess 3 two axially spaced circumferential grooves 19 are formed, which are opposite to each other have inclined groove flanks 21 and inner free spaces 20.
  • the groove flanks 21 form the cam surfaces N1, N2, which in the embodiment shown as a rotationally symmetrical conical surfaces to the axis of the closing member 3 are.
  • a plurality of balls 16 serve as cam members F of the catch R, which are axially arranged in two spaced radial bore rows 15 in the sleeve part 12a radially movable are.
  • a cylindrical circumferential section may lie between the two cam surfaces N1, N2 with a slightly reduced diameter of the adjustment shaft 3 '. Aligned on the radial bore rows 15 are two outwards in the sleeve part 12a Open circumferential grooves 14 are formed, in which the balls 16, ring-shaped Spring elements G are arranged.
  • an O-ring 22 which is knotted into a circumferential groove 13 and is under radial prestress, so that the balls 16 acted upon by it against the adjustment shaft 2 'are pressed inwards.
  • the O-rings 22 is a pressure sleeve 17 with a reduced diameter End portion 13 of the sleeve part 12a is pushed, on which the O-rings 22nd support inside, so that they with their tension and compression Act.
  • an inner end of the pressure sleeve 17 is included a funnel-shaped widening 18 is formed.
  • the angle ⁇ , which each cam surface N1, N2 encloses with the axis of the closing member 3, is, for example, 45 °.
  • the Hardness or compression of the O-rings 22 and / or the angle ⁇ of each cam surface N1, N2 it is possible to use the same blocking position holding forces or different ones Locking position holding forces Z to be set. So that the latching the respective Shut-off position holding force can be the axial distance between the cam surfaces N1, N2 so matched to the stroke of the closing member 3 that in the respective Blocking position, the balls 16 in a radial bore row their assigned Fully apply cam surface while the balls of the other radial bore row sit on the cylindrical outer circumference of the adjustment shaft 3 '. With this Voting is also achieved that the locking R when adjusting the closing member helps between the two shut-off positions, so that the adjustment drive only needs to generate an adjustment pulse and then at least the actual adjustment largely runs automatically.
  • the balls 16 or other cam members F could also be arranged in the adjustment shaft 3 ' are provided when the cam surfaces N1, N2 outside in the sleeve part 12a are.
  • a design with radially adjustable cam surfaces and radial firmly supported cam links would also be possible.
  • the latching (as indicated schematically in Fig. 1) with only one cam member or a cam member circumferential row and two cam surfaces N1, N2.
  • the cooperating surfaces (cam surfaces and cam members) are here with the Pairing "diagonally flat / spherical" shown. Other geometric pairings are also possible to achieve certain force curves when working the latching.
  • the seat valve is compact, reliable and inexpensive to manufacture, and simple mountable.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Compressor (AREA)
  • Lift Valve (AREA)

Abstract

The seat valve (S) has a closure member (3) with an adjusting drive (5,7), and a device to load the member in the closing position on the seat. The device consists of a mechanical, non-positive locking unit (R), released by the valve drive, with the sealing position locking force acting in the closing direction of the member. The bistable locked seat valve has adjusting impulse transmitters, to release the locking unit. The unit acts as an auxiliary adjusting drive, beginning at its release point. The adjusting drive has at least one switching magnet (M1,M2) for each direction. The valve is a 3/2-way path valve.

Description

Die Erfindung betrifft ein Sitzventil der im Oberbegriff des Anspruchs 1 angegebenen Art.The invention relates to a seat valve specified in the preamble of claim 1 Art.

Derartige, durch Vorbenutzung in der Praxis bekannte Sitzventile, im Regelfall Schwarz/Weiß-Ventile, weisen als Verstellantrieb einen Schaltmagneten auf, der das Schließglied gegen eine Feder verstellt. In der einfachsten Ausführung (2/2-Wege-Sitzventil) werden in der Absperrstellung des Schließgliedes die beiden Wege voneinander getrennt; in der Durchgangsstellung des Schließgliedes hingegen miteinander verbunden. Die Verriegelung zum Halten des Schließglieds in der Absperrstellung wird von dem Schaltmagneten und der Feder gebildet. Da solche Sitzventile im Regelfall mit sehr kleinen Hüben von nur wenigen 1/10 mm arbeiten, ist eine exakte und damit teure Abstimmung zwischen dem Schaltmagneten und der Feder erforderlich.Such seat valves, known from prior use in practice, as a rule Black / white valves have a switching magnet as the adjustment drive, which Locking element adjusted against a spring. In the simplest version (2/2-way seat valve) are the two ways from each other in the locking position of the locking member Cut; in the through position of the closing member, however, with each other connected. The lock for holding the locking element in the shut-off position is formed by the switching magnet and the spring. As such seat valves usually Working with very small strokes of just a few 1/10 mm is an exact and therefore expensive coordination between the switching magnet and the spring required.

Ein aus EP-A-0 492 242 bekanntes 3/2-Wege-Sitzventil mit elektromagnetischer Betätigung west als wechselseitig wirkende Verriegelung für die Schließglieder einen Schlepphebel auf, der durch eine Feder im Schwenksinn und in der jeweiligen Schließrichtung dann beaufschlagt wird, wenn er seinen Schwenk-Totpunkt in der einen oder anderen Richtung überschritten hat. Für die Verriegelung wird viel Bauraum benötigt. Die erzeugbare Schließkraft für das Schließglied ist gering.A 3/2-way seat valve with electromagnetic actuation known from EP-A-0 492 242 west as a two-way locking mechanism for the locking links Rocker arm on by a spring in the direction of rotation and in the respective Closing direction is then acted upon when it reaches its pivot dead center in one or other direction. There is a lot of space for locking needed. The closing force that can be generated for the closing element is low.

Aus DE-C-1 005 794 ist ein Wechsel-Sitzventil bekannt, dessen beiden Schließglieder über einen im Gehäuse schwenkbar gelagerten Verbindungshebel gekoppelt sind. Der Verbindungshebel trägt einen Steuemocken mit einem Scheitelpunkt. Eine im Gehäuse linear beweglich geführte und von einer Druckfeder beaufschlagte Kugel liegt auf dem Steuernocken auf. Die Verriegelung ist baulich aufwendig und beansprucht viel Bauraum.From DE-C-1 005 794 a change seat valve is known, the two closing members are coupled via a pivotally mounted connecting lever in the housing. The connecting lever carries a control cam with a vertex. One in Ball with linear movement and loaded by a compression spring rests on the control cam. The locking is structurally complex and stressed lots of installation space.

Bei einem aus GB-C-313 653 bekannten Treibstoff-Zapfventil sind um einen Verstellschaft des Schließgliedes mehrere Kugeln in Umfangsrichtung verteilt, die in Gehäusebohrungen radial beweglich geführt werden. Jede Kugel wird durch eine im Gehäuse abgestützte Druckfeder über einen Druckstößel beaufschlagt. Dies Verrastung ist baulich aufwendig und beansprucht viel Bauraum.In a fuel nozzle known from GB-C-313 653 are around an adjustment stem the closing member distributed several balls in the circumferential direction, which in the housing bores are guided radially movable. Each ball is replaced by one in the case supported compression spring applied via a pressure tappet. This is latching structurally complex and takes up a lot of space.

Bei einem aus DE-C-10 29 639 bekannten Schnell-Schlußventil trägt der Verstellschaft des Schließglieds eine Kugel, die bei der Öffnungs- bzw. Schließbewegung des Schließgliedes zwischen zwei federbeaufschlagten, gegeneinander wirkenden Gleitelementen hindurchgezwängt wird.In a quick-closing valve known from DE-C-10 29 639, the adjustment shaft carries of the closing member a ball, which during the opening or closing movement of the Closing member between two spring-loaded, counteracting sliding elements is squeezed through.

Bei einem aus US-A-4 796 860 bekannten Schieberventil sind auf einem Schieber-Verstellschaft zwei axial beabstandete, umlaufende Rippen vorgesehen, zwischen denen eine zylindrische Oberfläche vorliegt. In einer äußeren Ventilhülse in radialen Bohrungen beweglich gelagerte Kugein werden durch eine C-förmige Spannfeder radial einwärts gepreßt oder auch nur durch eine die Hülse umfassende Gummikappe. Diese Verriegelung erzeugt keine Haltekraft in der Schließstellung und erfordert es, eine Abdichtung gegenüber der Druckseite vorzusehen.In a slide valve known from US-A-4 796 860 are on a slide adjustment shaft two axially spaced, circumferential ribs are provided between which have a cylindrical surface. In an outer valve sleeve in radial Bores with movable bearings are radial by a C-shaped tension spring pressed inwards or only by a rubber cap surrounding the sleeve. This lock does not generate any holding force in the closed position and requires provide a seal against the pressure side.

Der Erfindung liegt die Aufgabe zugrunde, ein Sitzventil der eingangs genannten Art zu schaffen, das baulich einfach, kostengünstig herstellbar und mit geringem Energieaufwand verstellbar und dennoch mit hoher Kraft verriegelbar ist.The invention has for its object a seat valve of the type mentioned to create that structurally simple, inexpensive to manufacture and with low energy consumption adjustable and yet lockable with high force.

Die gestellte Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruchs 1 gelöst.The object is achieved according to the invention with the features of claim 1 solved.

In der Absperrstellung des Sitzventils kann der Verstellantrieb wirkungslos bleiben oder abgeschaltet werden, da die Verrastung das Schließglied in der Absperrstellung hält. Weil bei einem Sitzventil eine leckagefreie Absperrstellung eine bestimmte Absperrstellungs-Haltekraft benötigt, soll die mechanische, form-und kraftschlüssige Verrastung dann nicht in einer kraftlosen bzw. entspannten Position sein, sondern in einer Zwischenposition, in der sie das Schließglied mit der Absperrstellungs-Haltekraft gegen den Ventilsitz preßt und hält. Die Haltekraft wird hierbei durch den Kraftschluß der Verrastung im Zusammenspiel mit dem Formschluß erzeugt. Die Verrastung läßt sich auf baulich einfache Weise in das Sitzventil integrieren, das herstellungstechnisch einfach und kostengünstig ist. Da der Verstellantrieb nur zum Einleiten eines Verstellung gebraucht wird läßt sich das Sitzventil mit wenig Energieaufwand und deshalb mit einem einfachen und kostengünstigen Verstellantrieb verstellen. Diese Vorteile werden erzielt mit dem Kunstgriff, die Verrastung keine kraftlose Stellung erreichen zu lassen, sondern sie über das Schließglied in einer axial spannenden Zwischenlage abzufangen. Es wird eine relativ hohe Haltekraft von zweckmäßig jeweils mehreren, gemeinsam wirkenden Kugeln erzeugt. Die Verrastung läßt sich auf kleinem Bauraum unterbringen und ist in der Lage, trotz des bei Sitzventilen üblicherweise extrem kurzen Hubes in beiden Hubendlagen mit einer Haltekraft wirksam zu bleiben. O-Ringe als Federelemente für den Kraftschluß sind kostengünstig, benötigen extrem kleinen Einbauraum, und sind immun gegenüber dem Hydraulikmedium. Mit nur einem O-Ring lassen sich relativ viele Kugeln gleichförmig beaufschlagen. Das Ventil baut trotz integrierter Verriegelung kompakt.In the shut-off position of the seat valve, the adjustment drive can remain ineffective or be switched off because the latching the closing member in the shut-off position holds. Because with a seat valve, a leak-free shut-off position has a certain shut-off position holding force required, the mechanical, positive and non-positive Then the catch will not be in a weak or relaxed position, but in an intermediate position in which they hold the locking member with the blocking position presses and holds against the valve seat. The holding force is determined by the frictional connection the latching in interaction with the form closure. The latch leaves integrate themselves into the seat valve in a structurally simple manner is simple and inexpensive. Since the adjustment drive only for initiating one Adjustment is needed, the seat valve can be used with little energy and therefore adjust with a simple and inexpensive adjustment drive. This Advantages are achieved with the artifact that the catch does not reach a powerless position to let them but over the locking member in an axially exciting intermediate layer intercept. There is a relatively high holding force of appropriate in each case several balls acting together. The latching can be done on a small scale Accommodate installation space and is able to, despite that usually with seat valves extremely short strokes to remain effective in both stroke end positions with a holding force. O-rings as spring elements for the frictional connection are inexpensive, need extremely small installation space, and are immune to the hydraulic medium. With Only one O-ring can hold a relatively large number of balls uniformly. The The valve is compact despite the integrated lock.

Gemäß Anspruch 2 trägt die Unterbringung der O-Ringe in der Umfangsnut der Hülse zu kompakten Abmessungen bei.According to claim 2, the accommodation of the O-rings in the circumferential groove of the sleeve to compact dimensions.

Mit Winkeln von annähernd 45° werden gemäß Anspruch 3 für beide Verstellrichtungen im wesentlichen symmetrische Kraftverhältnisse erzielt. Es ist bei Bedarf allerdings denkbar, beispielsweise durch unterschiedliche Winkel, und/oder unterschiedliche Federkräfte verschiedene Haltekräfte in beiden Schaltstellungen des Schließgliedes zu erzielen.With angles of approximately 45 ° are according to claim 3 for both adjustment directions achieved essentially symmetrical force ratios. However, it is when needed conceivable, for example by different angles, and / or different Spring forces different holding forces in both switching positions of the closing element to achieve.

Gemäß Anspruch 4 ist die Verriegelung aus dem Arbeitsbereich des Schließgliedes verlegt.According to claim 4, the lock from the working area of the locking member relocated.

Gemäß Anspruch 5 wird durch den Freiraum sicherheitshalber bewirkt, daß die Verrastung die Haltekraft für das Schließelement erzeugt, ohne in eine entspannte Position gelangen zu können.According to claim 5, for safety's sake it is caused that the latching the holding force for the closing element is generated without being in a relaxed position to be able to get there.

Gemäß Anspruch 6erzeugt die gerade passive Verrastung keine störende Gegenkraft für die aktive Verrastung. Außerdem wird das Schließglied bei der Verstellung durch die beiden Verrastungen in der jeweiligen Verstellrichtung unterstützt. Der Verstellantrieb braucht nur den Verstellimpuls zu erzeugen. According to claim 6, the straight passive latching does not produce a disruptive counterforce for active locking. In addition, the closing member is in the adjustment supports the two catches in the respective adjustment direction. The adjustment drive only needs to generate the adjustment pulse.

Gemäß Anspruch 7 sind die Herstellung und die Montage des Sitzventils vereinfacht. Die Verrastung läßt sich gut unterbringen, ohne bewährte Ausbildungskonzepte solcher Sitzventile zu beeinträchtigen.According to claim 7, the manufacture and assembly of the seat valve are simplified. The latching can be accommodated well, without such proven training concepts Affect seat valves.

Dies trifft auch auf die Ausführungsform gemäß Anspruch 8 zu, bei der sich die O-Ringe an der Druckhülse abstützen, um eine kräftige radiale Vorspannung der Kugeln zu erzeugen. Die Montage wird durch die trichterförmige Auweitung erleichtert, mit der die Hülse leicht über die O-Ringe hinweggleitet und diese komprimiert.This also applies to the embodiment according to claim 8, in which the O-rings Support on the pressure sleeve to ensure a strong radial preload of the balls to create. The assembly is facilitated by the funnel-shaped expansion which easily slides the sleeve over the O-rings and compresses them.

Gemäß Anspruch 9 ist für beide Absperrstellungen je eine meshanische Verrastung vorgesehen, so daß das Sitzventil ohne Einflußnahme des Verstellantriebs bistabil ist. Eine Feder, die der Verstellantrieb dazwischen zu überwinden hätte, ist nicht erforderlich.According to claim 9, there is a mesh lock for each of the shut-off positions provided so that the seat valve is bistable without the influence of the adjustment drive. A spring that the adjustment drive would have to overcome in between is not required.

Gemäß Anspruch 10 ist die Verrastung ein Verstell-Hilfsantrieb für das Schließelement, die den eigentlichen Verstellantrieb weitgehend entlastet.According to claim 10, the latching is an adjusting auxiliary drive for the closing element, which largely relieves the actual adjustment drive.

Anhand der Zeichnung werden Ausführungsformen des Erfindungsgegenstandes erläutert. Es zeigen:

Fig. 1
schematisch einen Schnitt durch ein 2/2-Wegesitzventil mit Verstellung von außen,
Fig. 2
in symbolischer Darstellung ein mittels zweier Schaltmagneten verstellbares 3/2-Wegesitzventil,
Fig. 3
eine Gesamtansicht, teilweise im Schnitt, des Sitzventils entsprechend der symbolischen Darstellung von Fig. 2, und
Fig. 4
einen vergrößerten Detailschnitt zu Fig. 3.
Embodiments of the subject matter of the invention are explained with the aid of the drawing. Show it:
Fig. 1
schematically a section through a 2/2-way seat valve with adjustment from the outside,
Fig. 2
in symbolic representation a 3/2-way seat valve adjustable by means of two switching magnets,
Fig. 3
an overall view, partly in section, of the seat valve according to the symbolic representation of Fig. 2, and
Fig. 4
3 shows an enlarged detail section for FIG. 3.

Ein Sitzventil S in Fig. 1, z.B. ein 2/2-Wegesitzventil, weist in einem Gehäuse 1 einen Venitilsitz 2 zur Zusammenarbeit mit einem Schließglied 3 auf, das sich mit einer Sitzfläche 3a auf den Ventilsitz 2 auflegen läßt. Der Ventilsitz 2 ist zwischen Strömungswegen A, C vorgesehen. In der gezeigten Absperrstellung des Sitzventils S ist die Verbindung zwischen den Wegen A, C unterbrochen.A seat valve S in Fig. 1, e.g. a 2/2-way seat valve, has a in a housing 1 Venitilsitz 2 to cooperate with a locking member 3, which deals with a seat 3a can be placed on the valve seat 2. The valve seat 2 is between flow paths A, C provided. In the shown shut-off position of the seat valve S is the Connection between paths A, C broken.

Zur Verstellung des Schließgliedes 3 Zwischen der gezeigten Absperrstellung und einer abgehobenen Durchgangsstellung ist ein Verstellantrieb 5, 7 vorgesehen, der mit dem Schließglied 3 beispielsweise über die Elemente 4, 6 verbunden ist. Eine Axialkraft in Richtung des gestrichelten Pfeiles bzw. eine Absperrstellungs-Haltekratt Z hält das Schließglied 3 in der Absperrstellung. Eine Kraft in der Richtung des ausgezogenen, nach oben weisenden Pfeiles verstellt das Schließglied 3 in die Durchgangsstellung. Der Verstellantrieb 5, 7, der beispielsweise zweiteilig ist, läßt sich entweder manuell betätigen oder besteht aus Schaltmagneten oder wird von einer hydraulischen oder pneumatischen Vorsteuerung gebildet.To adjust the closing member 3 between the shut-off position shown and one lifted through position, an adjustment drive 5, 7 is provided which with the closing member 3 is connected, for example, via the elements 4, 6. An axial force holds in the direction of the dashed arrow or a shut-off position holding scratch Z. the closing member 3 in the shut-off position. A force in the direction of the extended, upward arrow moves the closing member 3 to the open position. The adjustment drive 5, 7, which is, for example, in two parts, can either be operated manually operate or consists of switching magnets or is operated by a hydraulic or pneumatic pilot control.

Das Sitzventil S wird in der gezeigten Absperrstellung durch eine mechanische, formund krattschlüssige Verrastung R gehalten. In der Verrastung ist ein Element 8 mit zwei gegensinnig schrägen Nockenflächen N1 und N2, z.B an dem Teil 4 vorgesehen. Die Nockenflächen N1 und N2 werden von einem Nockenglied F beaufschlagt, das durch eine Feder G belastet ist. Das Nockenglied F erzeugt dank des Form- und Kraftschlusses und der Kraft der Feder G die Absperrstellungs-Haltekraft Z für das Schließglied 3, da die Verrastung R vom Schließglied 3, zumindest in der Absperrstellung, am Erreichen einer entspannten Lage gehindert ist. Wird der Verstellantrieb 5, 7 in Richtung des nach oben weisenden, ausgezogen gezeichneten Pfeils betätigt, dann wird die Verrastung R gelöst und das Nockenfolgeglied F von der Nockenfläche N1 auf die Nockenfläche N2 gebracht, wodurch das Schließglied 3 in der Durchgangsstellung gehalten und dann gegebenenfalls mit einer nach oben gerichteten Kraft beaufschlagt wird. Der Verstellantrieb 5, 7 wird, da die Verrastung R als Verstell-Hilfsantrieb in beiden Verstellrichtungen wirkt, nur als Verstell-Impulsgeber I2, I1 benötigt, um eine Verstellung des Sitzventils S einzuleiten, die dann selbsttätig abläuft, bis wieder eine stabile Position des Schließgliedes erreicht ist. Auf diese Weise ist das Sitzventil S auch ohne Mitwirkung des Verstellantriebs bistabil, d.h. daß es in der jeweiligen verrasteten Position des Schließgliedes solange bleibt, bis en neuer, in der entgegengesetzten Richtung wirkender Verstellimpuls eingeleitet wird.The seat valve S is in the shut-off position shown by a mechanical, form and scratch-tight latching R held. An element 8 is in the latching two oppositely sloping cam surfaces N1 and N2, e.g. provided on part 4. The cam surfaces N1 and N2 are acted upon by a cam member F, which is loaded by a spring G. The cam member F produces thanks to the shape and Force closure and the force of the spring G, the blocking position holding force Z for the Locking member 3, since the locking R of the locking member 3, at least in the shut-off position, is prevented from reaching a relaxed position. If the adjustment drive 5, 7 actuated in the direction of the upward-pointing, drawn arrow, then the latch R is released and the cam follower F from the cam surface N1 brought to the cam surface N2, whereby the closing member 3 in the open position held and then optionally with an upward Force is applied. The adjustment drive 5, 7 is because the latching R as an adjustment auxiliary drive acts in both adjustment directions, only required as an adjustment pulse generator I2, I1, to initiate an adjustment of the seat valve S, which then runs automatically, until a stable position of the closing element is reached again. That is how it is Seat valve S is bistable even without the involvement of the adjustment drive, i.e. that it is in the respective locked position of the locking member remains until new, in the opposite direction acting adjustment pulse is initiated.

In Fig. 2 ist in symbolhafter Darstellung ein 3/2-Wegesitzventil S gezeigt, das wechselweise die Verbindung zweier Wege C, B oder C, A herstellt und dabei die Verbindung zum jeweils dritten Weg A oder B absperrt. Als Verstellantrieb 5, 7 dienen zwei Schaltmagneten mit entgegensetzten Wirkrichtungen, die ggfs. nur mehr Verstell-Impulsgeber I1 und I2 bilden, da das Sitzventil mit einer mechanischen Verrastung R ausgestattet ist, die in den beiden Absperrstellungen dieses Sitzventils S das Schließglied mit axialer Haltekraft festhält.In Fig. 2, a 3/2-way seat valve S is shown in a symbolic representation, which alternately creates the connection between two paths C, B or C, A and thereby the connection to the third path A or B. Two are used as adjusting drives 5, 7 Switching magnets with opposite directions of action, which may only be adjustable pulse generators Form I1 and I2 because the poppet valve with a mechanical catch R is equipped, which in the two shut-off positions of this seat valve S the Closing member holds with axial holding force.

Das Sitzventil gemäß Fig. 2 ist in seinem Aufbau in Fig. 3, teilweise im Schnitt, angedeutet. Die beiden Schaltmagneten 5, 7 werden über Anschlüsse 9 dann bestromt, wenn das Sitzventil S zu verstellen ist. Die Schaltmagneten sind Verstell-Impulsgeber und können nach der Verstellung wieder abgeschaltet oder entregt werden.The structure of the seat valve according to FIG. 2 is indicated in FIG. 3, partly in section. The two switching magnets 5, 7 are then energized via connections 9, if the seat valve S is to be adjusted. The switching magnets are adjustable pulse generators and can be switched off or de-energized after the adjustment.

Im Gehäuse 1 ist in einer Gehäusebohrung 10 ein mit der Verrastung R ausgestatteter patronenartiger Einsatz 11 untergebracht, der das Schließglied 3 enthält, das mittels der Schaltmagneten M1, M2 des Verstellantriebs 5, 7 hin-und herverstellbar ist. Der Hub des Sitzventils ist mit X angedeutet und relativ klein. Er beträgt beispielsweise nur wenige 1/10 mm, z.B. 0,5 mm. Die Elemente 4, 6 sind Stößel mit denen die Schaltmagneten den jeweiligen Verstellimpuls auf das Schließglied 3 übertragen. Der Detailaufbau des Sitzventils in Fig. 3 wird anhand Fig. 4 erläutert.In the housing 1 is in a housing bore 10 equipped with the locking R cartridge-like insert 11 housed, which contains the closing member 3, which means the switching magnet M1, M2 of the adjustment drive 5, 7 can be moved back and forth. The stroke of the seat valve is indicated by X and is relatively small. For example, it is only a few 1/10 mm, e.g. 0.5 mm. The elements 4, 6 are plungers with which the Switching magnet transmit the respective adjustment pulse to the closing element 3. Of the The detailed structure of the seat valve in FIG. 3 is explained with reference to FIG. 4.

In Fig. 4 ist der patronenförmige Einsatz 11 in der Gehäusebohrung 10 vergrößert und im Längsschnitt dargestellt. Das Schließglied 3, das bei der gezeigten Ausführungsform an einem Verstellschaft 3' angeordnet ist, wird in einer zweiteiligen Hülse 12a, 12b linear verstellt. In jedem Hülsenteil 12a, 12b ist ein Ventilsitz 2a, 2b geformt. Die beiden Ventilsitze 2a, 2b kooperieren wechselseitig mit den Sitzflächen 3a1 und 3a2 des Schließgliedes 3, um (s. Symbol in Fig. 2) entweder den Weg A mit dem Weg C zu verbinden und dabei B von A, C abzusperren, oder B mit C zu verbinden, und dabei A gegenüber C, B abzusperren. Die Sitzflächen 3a1, 3a2 sind beispielsweise kegelig, während die Ventilsitze 2a, 2b von den Mündungen zylindrischer Bohrungen gebildet werden. Am unteren Verstellende 3c2 des Schließgliedes 3 greift der Stößel 6 an, während am oberen Verstellende 3c1 der Stößel 4 des anderen Schaltmagneten angreift.In Fig. 4 the cartridge-shaped insert 11 is enlarged in the housing bore 10 and shown in longitudinal section. The closing member 3, which in the embodiment shown is arranged on an adjustment shaft 3 ', in a two-part sleeve 12a, 12b linearly adjusted. A valve seat 2a, 2b is formed in each sleeve part 12a, 12b. The two valve seats 2a, 2b mutually cooperate with the seat surfaces 3a1 and 3a2 of the closing member 3 in order (see symbol in FIG. 2) either path A with the path To connect C and thereby shut off B from A, C, or to connect B to C, and shut off A from C, B The seat surfaces 3a1, 3a2 are for example conical, while the valve seats 2a, 2b from the mouths of cylindrical bores be formed. The plunger engages at the lower adjusting end 3c2 of the closing member 3 6 on, while at the upper adjusting end 3c1 the plunger 4 of the other switching magnet attacks.

In dem patronenförmigen Einsatz 11 ist die Verrastung R enthalten. Im Verstellschaft 3' sind zwei axial beabstandete Umfangsnuten 19 eingeformt, die zueinander gegensinnig schräge Nutflanken 21 und innenliegende Freiräume 20 aufweisen. Die Nutflanken 21 bilden die Nockenflächen N1, N2, die bei der gezeigten Ausführungsform als zur Achse des Schließgliedes 3 rotationssymmetrische Kegelflächen ausgebildet sind.The catch R is contained in the cartridge-shaped insert 11. In the mess 3 'two axially spaced circumferential grooves 19 are formed, which are opposite to each other have inclined groove flanks 21 and inner free spaces 20. The groove flanks 21 form the cam surfaces N1, N2, which in the embodiment shown as a rotationally symmetrical conical surfaces to the axis of the closing member 3 are.

In der linken Hälfte von Fig. 4 sitzt die Sitzfläche 3a2 auf dem Ventilsitz 2b auf, während in der rechten Hälfte von Fig. 4 die andere Sitzfläche 3a1 auf dem zweiten Ventilsitz 2a aufsitzt. Dies sind die beiden Schaltstellungen des Sitzventils S, die durch die Verrastung R eingehalten werden, wobei in jeder Schaltstellung das Schließglied 3 mit einer durch die Verrastung R erzeugten Absperrstellungs-Haltekraft an den jeweiligen Ventilsitz gedrückt wird.In the left half of FIG. 4, the seat surface 3a2 sits on the valve seat 2b while in the right half of Fig. 4, the other seat 3a1 on the second valve seat 2a sits on. These are the two switching positions of the seat valve S by the Locking R are observed, with the closing member 3 in each switching position a blocking position holding force generated by the latching R on the respective Valve seat is pressed.

Als Nockenglieder F der Verrastung R dienen mehrere Kugeln 16, die in zwei axial beabstandeten Radialbohrungsreihen 15 im Hülsenteil 12a radial beweglich geführt sind. Zwischen den beiden Nockenflächen N1, N2 liegt ggfs. ein zylindrischer Umfangsabschnitt mit etwas verringertem Durchmesser des Verstellschaftes 3' vor. Ausgerichtet auf die Radialbohrungsreihen 15 sind im Hülsenteil 12a zwei nach außen offene Umfangsnuten 14 eingeformt, in denen die Kugeln 16 beaufschlagende, ringförmige Federelemente G angeordnet sind. In der gezeigten Ausführungsform handelt es sich jeweils um einen O-Ring 22, der in eine Umfangsnut 13 eingeknüpft ist und unter radialer Vorspannung steht, so daß die von ihm beaufschlagten Kugeln 16 gegen den Verstellschaft 2' nach innen gedrückt werden. Zur Montage bzw. zum Auswechseln der O-Ringe22 ist eine Druckhülse 17 über einen im Durchmesser verringerten Endabschnitt 13 des Hülsenteils 12a geschoben, an der sich die O-Ringe 22 innen zusätzlich abstützen, so daß sie mit ihrer Zugspannung und einer Kompression wirken. Zur einfacheren Montage ist ein innenliegendes Ende der Druckhülse 17 mit einer trichterförmigen Aufweitung 18 ausgebildet. A plurality of balls 16 serve as cam members F of the catch R, which are axially arranged in two spaced radial bore rows 15 in the sleeve part 12a radially movable are. A cylindrical circumferential section may lie between the two cam surfaces N1, N2 with a slightly reduced diameter of the adjustment shaft 3 '. Aligned on the radial bore rows 15 are two outwards in the sleeve part 12a Open circumferential grooves 14 are formed, in which the balls 16, ring-shaped Spring elements G are arranged. In the embodiment shown acts it is in each case an O-ring 22 which is knotted into a circumferential groove 13 and is under radial prestress, so that the balls 16 acted upon by it against the adjustment shaft 2 'are pressed inwards. For assembly or replacement the O-rings 22 is a pressure sleeve 17 with a reduced diameter End portion 13 of the sleeve part 12a is pushed, on which the O-rings 22nd support inside, so that they with their tension and compression Act. For easier assembly, an inner end of the pressure sleeve 17 is included a funnel-shaped widening 18 is formed.

Der Winkel α, den jede Nockenfläche N1, N2 mit der Achse des Schließgliedes 3 einschließt, beträgt beispielsweise 45°. Nach Auswahl der Anzahl der Kugeln 16, der Härte bzw. Kompression der O-Ringe 22 und/oder des Winkels α jeder Nockenflächen N1, N2 ist es möglich, gleiche Absperrstellungs-Haltekräfte oder unterschiedliche Absperrstellungs-Haltekräfte Z einzustellen. Damit die Verrastung die jeweilige Absperrstellungs-Haltekraft erzeugen kann, ist der axiale Abstand zwischen den Nokkenflächen N1, N2 so auf den Hub des Schließgliedes 3 abgestimmt, daß in der jeweiligen Absperrstellung die Kugeln 16 in einer Radialbohrungsreihe ihre zugeordnete Nockenfläche voll beaufschlagen, während die Kugeln der anderen Radialbohrungsreihe auf dem zylindrischen Außenumfang des Verstellschaftes 3' aufsitzen. Mit dieser Abstimmung wird ferner erreicht, daß die Verrastung R beim Verstellen des Schließgliedes zwischen den beiden Absperrstellungen mithilft, so daß der Verstellantrieb nur einen Verstellimpuls zu erzeugen braucht und die eigentliche Verstellung dann zumindest weitestgehend selbsttätig abläuft.The angle α, which each cam surface N1, N2 encloses with the axis of the closing member 3, is, for example, 45 °. After selecting the number of balls 16, the Hardness or compression of the O-rings 22 and / or the angle α of each cam surface N1, N2 it is possible to use the same blocking position holding forces or different ones Locking position holding forces Z to be set. So that the latching the respective Shut-off position holding force can be the axial distance between the cam surfaces N1, N2 so matched to the stroke of the closing member 3 that in the respective Blocking position, the balls 16 in a radial bore row their assigned Fully apply cam surface while the balls of the other radial bore row sit on the cylindrical outer circumference of the adjustment shaft 3 '. With this Voting is also achieved that the locking R when adjusting the closing member helps between the two shut-off positions, so that the adjustment drive only needs to generate an adjustment pulse and then at least the actual adjustment largely runs automatically.

Die Kugeln 16 oder andere Nockenglieder F könnten auch im Verstellschaft 3' angeordnet werden, wenn die Nockenflächen N1, N2 außen im Hülsenteil 12a vorgesehen sind. Eine Bauweise mit radial gegen Federkraft verstellbaren Nockenflächen und radial fest abgestützten Nockengliedern wäre ebenfalls möglich. Ferner ist es denkbar, die Verrastung (wie in Fig. 1 schematisch angedeutet) mit nur einem Nockenglied bzw. einer Nockengliedumfangsreihe und zwei Nockenflächen N1, N2 auszubilden. Die kooperierenden Flächen (Nockenflächen und Nockenglieder) sind hier mit der Paarung "schräg eben/kugelig" gezeigt. Andere geometrische Paarungen sind ebenfalls möglich, um bestimmte Kraftverläufe beim Arbeiten der Verrastung zu erzielen. Das Sitzventil ist kompakt, funktionssicher und kostengünstig herstellbar, und einfach montierbar.The balls 16 or other cam members F could also be arranged in the adjustment shaft 3 ' are provided when the cam surfaces N1, N2 outside in the sleeve part 12a are. A design with radially adjustable cam surfaces and radial firmly supported cam links would also be possible. It is also conceivable the latching (as indicated schematically in Fig. 1) with only one cam member or a cam member circumferential row and two cam surfaces N1, N2. The cooperating surfaces (cam surfaces and cam members) are here with the Pairing "diagonally flat / spherical" shown. Other geometric pairings are also possible to achieve certain force curves when working the latching. The seat valve is compact, reliable and inexpensive to manufacture, and simple mountable.

Claims (10)

Sitzventil (S), mit wenigstens einem Schließglied (3), dessen Schließfläche (3a, 3a1, 3a2) mit wenigstens einem Ventsitz (2, 2a, 2b) kooperiert, mit einem Verstellantrieb (5, 7) zum Verstellen des Schließgliedes zum Absperren oder Freigeden des Ventilsitzes, und mit einer das Schließglied (3) beaufschlagenden durch den Verstellantrieb (5, 7) lösbaren, form- und kraftschlüssigen Verrastung (R) zum Halten des Schließgliedes zumindest in der Absperrstellung am Ventilsitz mit in Schließrichtung wirkender Absperrstellungs-Haltekraft (Z), dadurch gekennzeichnet, daß an dem Schließglied (3) axial beabstandete Ringnuten (19) vorgesehen sind, daß in einer das Schließglied umgebenden Hülse (12a, 12b) in mindestens zwei axial beabstandeten, in Umfangsrichtung orientierten Bohrungen (14) Kugeln (16) gelagert sind, und daß jede Kugel (16) in jeder Bohrung von einem O-Ring (22) mit radialer Vorspannung beaufschlagt wird, der die Hülse im Bereich der jeweiligen Bohrung umfaßt.Seat valve (S), with at least one closing element (3), the closing surface (3a, 3a1, 3a2) of which cooperates with at least one seat (2, 2a, 2b), with an adjustment drive (5, 7) for adjusting the closing element to shut off or Freeing the valve seat, and with a positive and non-positive locking (R) which acts on the closing element (3) and can be released by the adjusting drive (5, 7), for holding the closing element at least in the shut-off position on the valve seat with the locking position holding force acting in the closing direction (Z ), characterized in that axially spaced annular grooves (19) are provided on the closing member (3), that balls (16) in at least two axially spaced, circumferentially oriented bores (14) in a sleeve (12a, 12b) surrounding the closing member are mounted, and that each ball (16) in each bore is acted upon by an O-ring (22) with radial prestress, which surrounds the sleeve in the region of the respective bore. Sitzventil nach Anspruch 1, dadurch gekennzeichnet, daß jeder O-Ring (22) in einer äußeren Umfangsnut (14) der Hülse angeordnet ist und sich an einer die Hülse umgebenden Wand abstützt, und daß jeweils mehrere in Umfangsrichtung ausgerichtete Bohrungen (14) mit radialen Achsen eine Bohrungsgruppe bilden.Seat valve according to claim 1, characterized in that each O-ring (22) is arranged in an outer circumferential groove (14) of the sleeve and is supported on a wall surrounding the sleeve, and in that in each case a plurality of circumferentially aligned bores (14) with radial Axes form a group of holes. Sitzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Ringnut wenigstens eine Schräge oder gerundete Nutflanke (21) aufweist, die vorzugsweise unter einem Winkel (α) von annähernd 45° gegen die Achse des Schließgliedes (3) geneigt ist.Seat valve according to claim 1, characterized in that the annular groove has at least one inclined or rounded groove flank (21) which is preferably inclined at an angle (α) of approximately 45 ° to the axis of the closing member (3). Sitzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Ringnuten (19) an einem mit dem Schließglied (3) verbundenen, in der Hülse (12a, 12b) enthaltenen Verstellschaft angeordnet sind. Seat valve according to claim 1, characterized in that the annular grooves (19) are arranged on an adjusting shaft which is connected to the closing member (3) and is contained in the sleeve (12a, 12b). Sitzventil nach Anspruch 3, dadurch gekennzeichnet, daß innen angrenzend an die Nutflanke (21) ein Freiraum (20) vorgesehen ist, und daß der axiale Abstand zwischen der Kugel (16), der ihr zugeordneten Nutflanke (21) und der Sitzfläche (3a1, 3a2) des Schließgliedes (3) derart gewählt ist, daß in der Absperrstellung die Kugel (16) auf die Nutflanke (21) gepreßt und im Freiraum ein radiales Spiel für die Kugel (16) aufrechtgehalten wird.Seat valve according to claim 3, characterized in that a space (20) is provided on the inside adjacent to the groove flank (21), and in that the axial distance between the ball (16), the groove flank (21) assigned to it and the seat surface (3a1, 3a2) of the closing member (3) is selected such that in the shut-off position the ball (16) is pressed onto the groove flank (21) and a radial play for the ball (16) is maintained in the free space. Sitzventil nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Nutflanken (21) in ihrer axialen Weite, die Durchmesser der Kugeln (16), und deren axialer Abstand derart aufeinander abgestimmt sind, daß innerhalb eines Schließglied-Hubweges (X) von ca. 0,5 mm abwechselnd die eine Kugel auf ihrer Nutflanke aufsitzt und die andere Kugel ihre Nutflanke freigibt.Seat valve according to at least one of the preceding claims, characterized in that the axial dimension of the groove flanks (21), the diameter of the balls (16), and their axial spacing are coordinated with one another in such a way that within a closing member travel path (X) of approx 0.5 mm alternately one ball sits on its groove flank and the other ball releases its groove flank. Sitzventil nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwei Ventilsitze (2a, 2b) in einer zwischen den Ventilsitzen geteilten, in eine Gehäusebohrung (10) eingesetzten Hülse (12a, 12b) geformt sind, die das Schließglied (3) abgedichtet verschieblich derart aufnimmt, daß Verstellenden (3c1, 3c2) des Schließgliedes (3) an beiden Enden der Hülse zugänglich sind, und daß die Verrastung (R) in der Hülse und am Schließelement zwischen den Verstellenden vorgesehen ist.Seat valve according to at least one of the preceding claims, characterized in that two valve seats (2a, 2b) are formed in a sleeve (12a, 12b) which is divided between the valve seats and inserted into a housing bore (10) and which seals the closing member (3) in a displaceable manner receives in such a way that adjusting ends (3c1, 3c2) of the closing member (3) are accessible at both ends of the sleeve, and that the catch (R) is provided in the sleeve and on the closing element between the adjusting ends. Sitzventil nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein im Durchmesser verringerter, die beiden O-Ringe (22) aufweisender Endabschnitt (13) der Hülse (12a, 12b) von einer Druckhülse (17) umfaßt ist, die, vorzugsweise, in einem Ende eine trichterförmige Aufweitung (18) aufweist.Seat valve according to at least one of the preceding claims, characterized in that an end portion (13) of the sleeve (12a, 12b) of reduced diameter and having the two O-rings (22) is surrounded by a pressure sleeve (17) which, preferably, has a funnel-shaped widening (18) in one end. Sitzventil nach Anspruch 1, dadurch gekennzeichnet, daß bei zwei Ventilsitzen (2a, 2b) und einem einzigen Schließglied (3) mit zwei Schließflächen (3a1, 3a2) oder zwei gekoppelten Schließgliedern mit je einer Schließfläche (3/2-Wegeoder 2/2-Wegesitzventil) für beide Absperrstellungen je eine mechanische Verrastung (R) vorgesehen ist.Seat valve according to claim 1, characterized in that with two valve seats (2a, 2b) and a single closing element (3) with two closing surfaces (3a1, 3a2) or two coupled closing elements, each with one closing surface (3/2-way or 2 / 2- Directional seat valve) a mechanical lock (R) is provided for each of the shut-off positions. Sitzventil nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Verrastung (R) ab ihrem jeweiligen Lösepunkt als Verstell-Hilfsantrieb für das Schließelement (3) ausgebildet ist.Seat valve according to at least one of the preceding claims, characterized in that the catch (R) is designed as an auxiliary adjustment drive for the closing element (3) from its respective release point.
EP98108827A 1997-09-02 1998-05-14 Seat valve Expired - Lifetime EP0900963B1 (en)

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DE102019202052B4 (en) * 2019-02-15 2022-09-01 Hawe Hydraulik Se directional seated valve
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Publication number Priority date Publication date Assignee Title
GB313653A (en) 1928-03-16 1929-06-17 Shell Mex Ltd Improvements in or relating to taps for controlling the supply of a fluid
DE1005794B (en) 1955-01-25 1957-04-04 Kissing & Moellmann Armaturenf Shuttle valve
DE1029639B (en) 1955-11-11 1958-05-08 Kromschroeder Ag G Manually operated quick-closing valve
US3602245A (en) * 1970-02-26 1971-08-31 Abex Corp Universal detent positioner
DE2407136A1 (en) * 1974-02-15 1975-08-21 Rexroth Gmbh G L Through valve with position stop - determines control piston positions and contains spheres in radial bores in sleeve
US4796860A (en) 1987-10-16 1989-01-10 Eaton Corporation Valve spool detent
EP0492242A2 (en) 1990-12-28 1992-07-01 Firma J. Eberspächer Electromagnetic valve for regulating the fluid flow
EP0492242B1 (en) * 1990-12-28 1996-06-05 Firma J. Eberspächer Electromagnetic valve for regulating the fluid flow

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EP0900963B1 (en) 2003-02-26
DE59807291D1 (en) 2003-04-03
DE29715748U1 (en) 1997-11-06

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