EP1042616B1 - Pulse-actuated pneumatic 4/2 directional valve - Google Patents
Pulse-actuated pneumatic 4/2 directional valve Download PDFInfo
- Publication number
- EP1042616B1 EP1042616B1 EP99952432A EP99952432A EP1042616B1 EP 1042616 B1 EP1042616 B1 EP 1042616B1 EP 99952432 A EP99952432 A EP 99952432A EP 99952432 A EP99952432 A EP 99952432A EP 1042616 B1 EP1042616 B1 EP 1042616B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- pulse
- pneumatic
- controlled
- directional valve
- 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.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0832—Modular valves
- F15B13/0839—Stacked plate type valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—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
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0821—Attachment or sealing of modular units to each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0878—Assembly of modular units
- F15B13/0896—Assembly of modular units using different types or sizes of valves
Definitions
- the invention is based on an impulse-controlled, pneumatic 4/2-way valve corresponding to the type of Claim 1.
- Such directional valves in particular for Control of double-acting consumers are used, are controlled by control pulses from their one switch position switched their other switching position. Between two Control pulses, i.e. without an effective control signal on the Directional control valve, the existing switching position remains.
- a pulse-controlled, pneumatic directional control valve is for example from the Bosch Pneumatics Information catalog, Basics and device functional description No. 1 829 929 077, page 33, edition 9/77 already known.
- the switching function is activated by means of a single valve spool, which is in a housing bore is flexibly guided, realized.
- the valve spool controls pressure medium connections between each other neighboring pressure chambers and builds relatively long.
- the Directional control valve therefore has a relatively large construction volume.
- the housing bore for pressure-tight and Low-friction guidance of the valve spool is cost-intensive small tolerances are produced. Is inevitable nevertheless, that the systemic friction of a Valve spool negatively on the aimed short Switching times of a directional valve affects.
- DE 31 07 012 C2 is a hydraulic one Directional control valve known, in which two 3/2-way valves interact with each other. Both switching valves are as monostable flat seat valves. With this Directional control valve is different from the subject of Invention for a 4/3-way valve with a third Neutral position, in which both consumer connections to Return pressure relieved and the inlet connections blocked are. A bistable 4/2 switching function is included with this Design of a directional valve cannot be realized.
- an inventive, pulse-controlled pneumatic 4/2-way valve with the characteristic Features of claim 1 the advantage that there are two bistable switch positions with an extremely compact design and short switching times. This is achieved through two interacting switching valves in 3/2-way construction.
- the first switching valve is a bistable one Gate valve formed while the second switching valve is a monostable poppet valve.
- Seat valves allow at good sealing properties a particularly low-friction Operation as it is without circumferential, friction-generating Sealing elements get along.
- Such a directional valve is particularly light in one to accommodate disc-shaped housing and is suitable therefore especially for blocking with other directional valves.
- the design according to the invention is also inexpensive realizable. Further advantages or advantageous
- the directional valve 10 disc-shaped housing 11 with two one above the other arranged switching valves 12, 13. These switching valves 12, 13 are provided with valve spools 14, 16 which in Recesses 18, 20 are movably guided.
- the first Valve slide 14 associated first recess 18 is as Through hole executed, the inside diameter is discontinued several times, with the two outside End regions 18a of the through hole each the largest Have inside diameter.
- the one between the two end areas 18a lying section of the recess 18 is in a relatively long slide area 18b and one shorter, smaller inside diameter guide area 18c divided.
- Support rings 22 pressed in at an axial distance from one another. to correct mounting of the support rings 22 can Slider region 18b in diameter to be Form stop edges for these support rings 22.
- the inner surfaces of the support rings 22 act as sealing surfaces for sealing rings 24 on the circumference of the first valve spool 14 are arranged.
- This valve slide 14 thus limits together with the support rings 22 and the wall of the Through hole 18 three adjacent pressure chambers 26a-c, with pressure medium connections between two adjacent pressure chambers 26 through the Valve slide 14 released depending on its switching position or be closed.
- valve spool 14 is in two piston sections 14a and 14b and a constriction 14c, the two Piston sections 14a, b interconnected, structured.
- the middle pressure chamber 26b is an external one Pressure medium channel 32, of which only the in Figure 1 Mouth cross section is recognizable with a first Working port 34 of the directional control valve 10 connected.
- the return 28 and the inlet 30 run perpendicular to Recess 18 and end on the two side surfaces of the disc-shaped housing 11. This can be done with appropriately trained, adjacent housings (not drawn) to valve blocks, which are connected by means of a common supply and return 30, 28 with pressure medium or disposed of.
- the two working connections 34, 35 of the directional valve 10 on a common end face of the Housing 11 provided.
- they are as Plug connections for plastic pipes and on the the second switching valve 13 facing the end of the Housing 11 placed.
- the valve spool 14 is in two switching positions in which the first working port 34 either is coupled to the inlet 30 or the return 28.
- the Switching process is exemplary in the embodiment of Piston 36, 37 causes the in the end regions 18a Recess 18 are guided and the two End faces of the valve spool 14 act.
- the End regions 18a accordingly form together with the pistons 36, 37 two counter-acting cylinder units, the can be pressurized externally. alternative this can be done by actuating the valve slide 14 of course also on mechanical or done electromechanical way.
- Reset devices for the valve spool 14 are not provided, so that the respective switching position of the switching valve 12 also after Elimination of the pressurization of one of the pistons 36, 37 remains. Accordingly, it is the described switching valve 12 to a conventional in itself well-known, bistable 3/2-way slide valve.
- the switching valve 12 described is pneumatic with the second switching valve 13 coupled as a monostable Flat seat valve is designed in 3/2-way construction.
- the latter is in the parallel to the recess 18
- Recess 20 housed as a blind hole is executed.
- the blind hole is towards the surroundings pressure-tight by means of a pressed-in stopper 38 locked.
- In the recess 20 are two axially spaced-in annular body 40 pressed in, the interior, as in the case of the switching valve 12, in three Subdivide adjacent pressure chambers 42a-c. Interactions between these pressure chambers 42a-c controlled by valve spool 16.
- Whose plug 38 facing, first end forms an actuating piston 43, which is delimited on the circumference by a lip sealing element 44 is.
- the second end opposite the actuating piston 43 of the valve slide 16 has a support collar 46 on which a return spring 48 is present. This is based on the bottom of the recess 20 and sets the second switching valve 13 in its depressurized state to the basic position back.
- A acts as a valve member of this second switching valve 13
- Seat body 50 which is fixed to the valve slide 16.
- the Seat body 50 forms together with the side surfaces one of the two ring bodies 40 two each other opposed flat seat valves 51a, b.
- Flat seat valves 51a, b are characterized by their low-friction operation and their good tightness.
- the second switching valve 13 is pneumatic pressure medium channels 52, 54, 56 on the housing side with the first Switch valve 12 connected.
- the first pressure medium channel 52 connects the return side pressure chamber 26a of the first Switch valve 12 with the side of the actuating piston 43 limited pressure chamber 42a of the second switching valve 13, while the second pressure medium channel 54 from the inlet-side pressure chamber 26c of the first switching valve 12 to the pressure chamber facing away from the actuating piston 43 42c of the second switching valve 13 leads.
- the return spring 48 is also located in the pressure chamber 42c.
- the middle pressure chamber 42b is in communication with the second working port 35 of the directional valve 10 and the Cylinder chamber of the actuating piston 43 is over the third pressure channel 56 with the first working port 34 acting medium pressure chamber 26b of the first Switching valve 12 connected in parallel.
- the switch symbol shown on the left in FIG. 2 represents this that connected to the first working connection 34, as Executed slide valve, first switching valve 12 and that right switching symbol that the second working connection 35th Controlling, spring-loaded second switching valve 13 in Flat seat design.
- Both switching valves 12 and 13 can assume two switch positions and each have three Connections, namely the inlet 30, the return 28 and the Working port 34 or 35.
- the first switching valve 12 is closed its actuation externally, in particular by the piston 36 and 37, controllable while the second switching valve 13 by the actuating piston 43 from the pressure level at the first Working port 34 controlled and by the return spring 48th is returned to its basic position.
- the directional control valve 10 is switched over by a Pressure pulse on the drawn in the deflected position first piston 36 of the first switching valve 12.
- the by this Piston 36 generated pressure force moves the valve spool 14 in Figure 1 to the right, making the first work port 34 charged with inlet pressure and separated from the return 28 becomes.
- the inlet pressure passes through the pressure medium channel 56 into the cylinder chamber of the actuating piston 43 of the second Switch valve 13 and deflects its valve spool 16 counter the force of the return spring 48. So far closed first flat seat valve 51a is opened and that opposite second flat seat valve 51b closed, whereby the second working connection 35 to the return 28 is relieved and blocked from the inlet 30.
- the actuating piston 43 of the second switching valve 13 via the pressure medium channel 56 also then supplied with high pressure when the first piston 36 of the switching valve 12 no longer acts at all.
- a changeover of the directional valve 10 to the first Working connection 34 again with the return 28 and the second working connection 35 again with the inlet 30 connect, is by a pressure pulse on the second Actuating piston 37 of the first switching valve 12 possible.
- the switching valve 10 accordingly has two bistable Switch positions.
- the switching symbol for the directional valve 10 described as The structural unit is drawn in FIG. 3. Accordingly, that represents Directional control valve 10 one valve with four connections - two Work connections 34, 35, an inlet 30 and one Return 28 - represents that of the externally controlled pistons 36 and 37 can be brought into two switching positions. In these two switch positions are the working connections 34, 35 alternately with the inlet 30 or the return 28 coupled.
- the directional control valve 10 is reversed by outside, for example by pressure impulses on the two Actuating pistons 36, 37; Reset devices are not present, so that there are two bistable switching positions acts, which receive even after the control pulses are no longer available stay.
Description
Die Erfindung geht aus von einem impulsgesteuerten, pneumatischen 4/2-Wegeventil entsprechend der Gattung des Anspruchs 1. Derartige Wegeventile, die insbesondere zur Ansteuerung doppeltwirkender Verbraucher eingesetzt werden, werden durch Steuerimpulse von ihrer einen Schaltstellung in ihre andere Schaltstellung umgeschaltet. Zwischen zwei Steuerimpulsen, d.h. ohne wirksames Ansteuersignal auf das Wegeventil, bleibt die vorhandene Schaltstellung bestehen.The invention is based on an impulse-controlled, pneumatic 4/2-way valve corresponding to the type of Claim 1. Such directional valves, in particular for Control of double-acting consumers are used, are controlled by control pulses from their one switch position switched their other switching position. Between two Control pulses, i.e. without an effective control signal on the Directional control valve, the existing switching position remains.
Ein impulsgesteuertes, pneumatisches Wegeventil ist beispielsweise aus dem Firmenkatalog Bosch-Pneumatik-Informationen, Grundlagen und Geräte-Funktionsbeschreibung Nr. 1 829 929 077, Seite 33, Auflage 9/77 bereits bekannt. Bei diesem Wegeventil wird die Schaltfunktion mittels eines einzelnen Ventilschiebers, der in einer Gehäusebohrung beweglich geführt ist, realisiert. Der Ventilschieber steuert dabei Druckmittelverbindungen zwischen zueinander benachbarten Druckkammern und baut relativ lang. Das Wegeventil weist deshalb ein relativ großes Bauvolumen auf. Zudem muß die Gehäusebohrung zur druckdichten und reibungsarmen Führung des Ventilschiebers kostenintensiv mit geringen Toleranzen hergestellt werden. Unvermeidbar ist dennoch, daß sich die systembedingte Reibung eines Ventilschiebers negativ auf die angestrebten kurzen Schaltzeiten eines Wegeventils auswirkt.A pulse-controlled, pneumatic directional control valve is for example from the Bosch Pneumatics Information catalog, Basics and device functional description No. 1 829 929 077, page 33, edition 9/77 already known. With this directional control valve, the switching function is activated by means of a single valve spool, which is in a housing bore is flexibly guided, realized. The valve spool controls pressure medium connections between each other neighboring pressure chambers and builds relatively long. The Directional control valve therefore has a relatively large construction volume. In addition, the housing bore for pressure-tight and Low-friction guidance of the valve spool is cost-intensive small tolerances are produced. Is inevitable nevertheless, that the systemic friction of a Valve spool negatively on the aimed short Switching times of a directional valve affects.
Des weiteren ist aus der DE 31 07 012 C2 ein hydraulisches Wegeventil bekannt, bei dem zwei 3/2-Schaltventile miteinander zusammenwirken. Beide Schaltventile sind als monostabile Flachsitzventile ausgeführt. Bei diesem Wegeventil handelt es sich im Unterschied zum Gegenstand der Erfindung um ein 4/3-Wegeventil mit einer dritten Neutralstellung, in der beide Verbraucheranschlüsse zum Rücklauf druckentlastet und die Zulaufanschlüsse gesperrt sind. Eine bistabile 4/2-Schaltfunktion ist bei dieser Bauweise eines Wegeventils nicht realisierbar.Furthermore, DE 31 07 012 C2 is a hydraulic one Directional control valve known, in which two 3/2-way valves interact with each other. Both switching valves are as monostable flat seat valves. With this Directional control valve is different from the subject of Invention for a 4/3-way valve with a third Neutral position, in which both consumer connections to Return pressure relieved and the inlet connections blocked are. A bistable 4/2 switching function is included with this Design of a directional valve cannot be realized.
Demgegenüber weist ein erfindungsgemäßes, impulsgesteuertes pneumatisches 4/2-Wegeventil mit den kennzeichnenden Merkmalen des Anspruchs 1 den Vorteil auf, daß es zwei bistabile Schaltstellungen bei äußerst kompakter Bauweise und kurzen Schaltzeiten ermöglicht. Erreicht wird dies durch zwei miteinander zusammenwirkende Schaltventile in 3/2-Wege-Bauweise. Das erste Schaltventil ist dabei als bistabiles Schieberventil ausgebildet, während das zweite Schaltventil ein monostabiles Sitzventil ist. Sitzventile ermöglichen bei guten Dichteigenschaften einen besonders reibungsarmen Betrieb, da sie ohne umfangseitige, reibungserzeugende Dichtelemente auskommen.In contrast, an inventive, pulse-controlled pneumatic 4/2-way valve with the characteristic Features of claim 1 the advantage that there are two bistable switch positions with an extremely compact design and short switching times. This is achieved through two interacting switching valves in 3/2-way construction. The first switching valve is a bistable one Gate valve formed while the second switching valve is a monostable poppet valve. Seat valves allow at good sealing properties a particularly low-friction Operation as it is without circumferential, friction-generating Sealing elements get along.
Ein derartiges Wegeventil ist besonders leicht in einem scheibenförmigen Gehäuse unterzubringen und eignet sich dadurch besonders zum Verblocken mit anderen Wegeventilen. Die erfindungsgemäße Bauform ist zudem kostengünstig realisierbar. Weitere Vorteile oder vorteilhafteSuch a directional valve is particularly light in one to accommodate disc-shaped housing and is suitable therefore especially for blocking with other directional valves. The design according to the invention is also inexpensive realizable. Further advantages or advantageous
Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der Beschreibung.Further developments of the invention result from the Subclaims and the description.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.
- Die Figur 1
- zeigt ein erfindungegemäßes Wegeventil im Längsschnitt,
- in Figur 2
- sind, zur Beschreibung der Funktionen des Wegeventils, die Schaltsymbole der Einzelkomponenten dargestellt;
- Figur 3
- zeigt ein Schaltsymbol, das die Funktionsweise des erfindungsgemäßen Wegeventils als Baueinheit verdeutlicht.
- Figure 1
- shows a directional control valve according to the invention in longitudinal section,
- in Figure 2
- the circuit symbols of the individual components are shown to describe the functions of the directional valve;
- Figure 3
- shows a circuit symbol that illustrates the operation of the directional control valve according to the invention as a structural unit.
Gemäß Figur 1 weist das erfindungsgemäße Wegeventil 10 ein
scheibenförmiges Gehäuse 11 mit zwei übereinander
angeordneten Schaltventilen 12, 13 auf. Diese Schaltventile
12, 13 sind mit Ventilschiebern 14, 16 versehen, die in
Ausnehmungen 18, 20 beweglich geführt sind. Die dem ersten
Ventilschieber 14 zugeordnete erste Ausnehmung 18 ist als
Durchgangsbohrung ausgeführt, deren Innendurchmesser
mehrmals abgesetzt ist, wobei die beiden außenliegenden
Endbereiche 18a der Durchgangsbohrung jeweils den größten
Innendurchmesser haben. Der zwischen den beiden Endbereichen
18a liegende Abschnitt der Ausnehmung 18 ist in einen
verhältnismäßig langen Schieberbereich 18b und einen
kürzeren, im Innendurchmesser kleineren, Führungsbereich 18c
unterteilt. In den Schieberbereich 18b sind mehrere
Stützringe 22 mit axialem Abstand zueinander eingepreßt. Zur
positionsgerechten Montage der Stützringe 22 kann der
Schieberbereich 18b im Durchmesser abgesetzt sein, um
Anschlagkanten für diese Stützringe 22 auszubilden. According to Figure 1, the
Die Innenflächen der Stützringe 22 wirken als Dichtflächen
für Dichtringe 24, die am Umfang des ersten Ventilschiebers
14 angeordnet sind. Dieser Ventilschieber 14 begrenzt somit
zusammen mit den Stützringen 22 und der Wandung der
Durchgangsbohrung 18 drei nebeneinanderliegende Druckkammern
26a-c, wobei Druckmittelverbindungen zwischen jeweils zwei
zueinander benachbarten Druckkammern 26 durch den
Ventilschieber 14 je nach dessen Schaltstellung freigegeben
oder verschlossen werden.The inner surfaces of the
Hierfür ist der Ventilschieber 14 in zwei Kolbenabschnitte
14a und 14b und eine Einschnürung 14c, die die beiden
Kolbenabschnitte 14a,b miteinander verbindet, gegliedert.For this purpose, the valve spool 14 is in two
In die beiden äußeren Druckkammern 26a, 26c mündet der
Rücklauf 28 bzw. der Zulauf 30 des Wegeventils 10 ein, die
mittlere Druckkammer 26b ist über einen nach außen geführten
Druckmittelkanal 32, von dem in Figur 1 nur der
Mündungsquerschnitt erkennbar ist, mit einem ersten
Arbeitsanschluß 34 des Wegeventils 10 verbunden.The opens into the two
Der Rücklauf 28 und der Zulauf 30 verlaufen senkrecht zur
Ausnehmung 18 und enden an den beiden Seitenflächen des
scheibenförmigen Gehäuses 11. Dieses läßt sich dadurch mit
entsprechend ausgebildeten, benachbarten Gehäusen (nicht
gezeichnet) zu Ventilblöcken verbinden, die mittels eines
gemeinsamen Zu- und Rücklaufs 30, 28 mit Druckmittel ver-
bzw. entsorgt werden.The
Im Gegensatz dazu sind die beiden Arbeitsanschlüsse 34, 35
des Wegeventils 10 an einer gemeinsamen Stirnseite des
Gehäuses 11 vorgesehen. Sie sind beispielsweise als
Steckanschlüsse für Kunststoffrohre ausgeführt und an der
dem zweiten Schaltventil 13 zugewandten Stirnseite des
Gehäuses 11 plaziert. In contrast, the two
Der Ventilschieber 14 ist in zwei Schaltstellungen
verbringbar, in denen der erste Arbeitsanschluß 34 entweder
mit dem Zulauf 30 oder dem Rücklauf 28 gekoppelt wird. Der
Schaltvorgang wird im Ausführungsbeispiel exemplarisch von
Kolben 36, 37 bewirkt, die in den Endbereichen 18a der
Ausnehmung 18 geführt sind und die auf die beiden
Stirnflächen des Ventilschiebers 14 einwirken. Die
Endbereiche 18a bilden demnach zusammen mit den Kolben 36,
37 zwei in Gegenrichtung wirkende Zylindereinheiten aus, die
von extern mit Druckmittel beaufschlagbar sind. Alternativ
dazu kann diese Beaufschlagung des Ventilschiebers 14
selbstverständlich auch auf mechanischem oder
elektromechanischem Weg erfolgen. Rückstelleinrichtungen für
den Ventilschieber 14 sind nicht vorgesehen, so daß die
jeweilige Schaltstellung des Schaltventils 12 auch nach
Wegfall der Druckbeaufschlagung eines der Kolben 36, 37
bestehen bleibt. Demnach handelt es sich bei dem
beschriebenen Schaltventil 12 um ein, an sich herkömmlich
bekanntes, bistabiles 3/2-Wege-Schieberventil.The valve spool 14 is in two switching positions
in which the first working
Das beschriebene Schaltventil 12 ist pneumatisch mit dem
zweiten Schaltventil 13 gekoppelt, das als monostabiles
Flachsitzventil in 3/2-Wege-Bauweise ausgebildet ist.
Letzteres ist in der parallel zur Ausnehmung 18 verlaufenden
Ausnehmung 20 untergebracht, die als Sacklochbohrung
ausgeführt ist. Zur Umgebung hin ist die Sacklochbohrung
mittels eines eingepreßten Stopfens 38 druckdicht
verschlossen. In die Ausnehmung 20 sind zwei axial
beabstandete Ringkörper 40 eingepreßt, die deren Innenraum,
wie im Falle des Schaltventils 12, in drei
nebeneinanderliegende Druckkammern 42a-c unterteilen.
Wechselwirkungen zwischen diesen Druckkammern 42a-c werden
vom Ventilschieber 16 gesteuert. Dessen dem Stopfen 38
zugewandtes, erstes Ende bildet einen Betätigungskolben 43,
der umfangseitig von einem Lippendichtelement 44 begrenzt
ist.The
Das dem Betätigungskolben 43 gegenüberliegende zweite Ende
des Ventilschiebers 16 weist einen Stützbund 46 auf, an dem
eine Rückstellfeder 48 anliegt. Diese stützt sich am Grund
der Ausnehmung 20 ab und stellt das zweite Schaltventil 13
in seinem druckentlasteten Zustand in die Grundstellung
zurück.The second end opposite the actuating
Als Ventilglied dieses zweiten Schaltventils 13 wirkt ein
Sitzkörper 50, der am Ventilschieber 16 festgelegt ist. Der
Sitzkörper 50 bildet zusammen mit den Seitenflächen jeweils
eines der beiden Ringkörper 40 zwei einander
gegenüberliegende Flachsitzventile 51a,b. Derartige
Flachsitzventile 51a,b zeichnen sich durch ihren
reibungsarmen Betrieb und ihre gute Dichtheit aus.A acts as a valve member of this
Pneumatisch ist das zweite Schaltventil 13 durch
gehäuseseitige Druckmittelkanäle 52, 54, 56 mit dem ersten
Schaltventil 12 verbunden. Der erste Druckmittelkanal 52
verbindet die rücklaufseitige Druckkammer 26a des ersten
Schaltventils 12 mit der vom Betätigungskolben 43 seitlich
begrenzten Druckkammer 42a des zweiten Schaltventils 13,
während der zweite Druckmittelkanal 54 von der
zulaufseitigen Druckkammer 26c des ersten Schaltventils 12
zur vom Betätigungskolben 43 abgewandt liegenden Druckkammer
42c des zweiten Schaltventils 13 führt. In dieser
Druckkammer 42c befindet sich auch die Rückstellfeder 48.
Die mittlere Druckkammer 42b steht in Verbindung mit dem
zweiten Arbeitsanschluß 35 des Wegeventils 10 und die
Zylinderkammer des Betätigungskolbens 43 ist über den
dritten Druckkanal 56 mit der den ersten Arbeitsanschluß 34
beaufschlagenden mittleren Druckkammer 26b des ersten
Schaltventils 12 parallel geschaltet. The
Aufgrund dieser hydraulischen Koppelung der beiden
Schaltventile 12 und 13 ergibt sich der in der Figur 2
schematisch dargestellte Schaltplan.Because of this hydraulic coupling of the two
Darin stellt das in Figur 2 links gezeichnete Schaltsymbol
das mit dem ersten Arbeitsanschluß 34 verbundene, als
Schieberventil ausgeführte, erste Schaltventil 12 und das
rechte Schaltsymbol das den zweiten Arbeitsanschluß 35
steuernde, federbeaufschlagte zweite Schaltventil 13 in
Flachsitzbauweise dar. Beide Schaltventile 12 und 13 können
zwei Schaltstellungen annehmen und haben jeweils drei
Anschlüsse, nämlich den Zulauf 30, den Rücklauf 28 und den
Arbeitsanschluß 34 oder 35. Das erste Schaltventil 12 ist zu
seiner Betätigung extern, im speziellen von den Kolben 36
und 37, ansteuerbar, während das zweite Schaltventil 13
durch den Betätigungskolben 43 vom Druckniveau am ersten
Arbeitsanschluß 34 angesteuert und von der Rückstellfeder 48
in seine Grundstellung zurückgestellt wird.The switch symbol shown on the left in FIG. 2 represents this
that connected to the
In der gezeichneten Grundstellung des Wegeventils 10, die
auch in Figur 1 dargestellt ist, befindet sich das erste
Schaltventil 12 in einer Stellung, in der der erste
Arbeitsanschluß 34 zum Rücklauf 28 hin entlastet und der
Zulauf 30 abgesperrt ist. Gleichzeitig gibt das zweite
Schaltventil 13 eine Druckmittelverbindung zwischen dem
Zulauf 30 und dem zweiten Arbeitsanschluß 35 frei und trennt
diesen zweiten Arbeitsanschluß 35 vom Rücklauf 28.In the drawn basic position of the
Die Umschaltung des Wegeventils 10 erfolgt durch einen
Druckimpuls auf den in ausgelenkter Stellung gezeichneten
ersten Kolben 36 des ersten Schaltventils 12. Die von diesem
Kolben 36 erzeugte Druckkraft verschiebt den Ventilschieber
14 in Figur 1 nach rechts, wodurch der erste Arbeitsanschluß
34 mit Zulaufdruck beaufschlagt und vom Rücklauf 28 getrennt
wird. Über den Druckmittelkanal 56 gelangt der Zulaufdruck
in die Zylinderkammer des Betätigungskolbens 43 des zweiten
Schaltventils 13 und lenkt dessen Ventilschieber 16 entgegen
der Kraft der Rückstellfeder 48 aus. Das bislang
geschlossene erste Flachsitzventil 51a wird geöffnet und das
gegenüberliegende zweite Flachsitzventil 51b geschlossen,
wodurch der zweite Arbeitsanschluß 35 zum Rücklauf 28 hin
entlastet und vom Zulauf 30 abgesperrt wird. Aufgrund des
erhöhten Druckniveaus in der mittleren Druckkammer 26b des
ersten Schaltventils 12 wird der Betätigungskolben 43 des
zweiten Schaltventils 13 über den Druckmittelkanal 56 auch
dann mit Hochdruck versorgt, wenn auf den ersten Kolben 36
des Schaltventils 12 gar kein Ansteuersignal mehr einwirkt.
Eine Umschaltung des Wegeventils 10, um den ersten
Arbeitsanschluß 34 wieder mit dem Rücklauf 28 und den
zweiten Arbeitsanschluß 35 wieder mit dem Zulauf 30 zu
verbinden, ist durch einen Druckimpuls auf den zweiten
Betätigungskolben 37 des ersten Schaltventils 12 möglich.
Das Schaltventil 10 weist demnach zwei bistabile
Schaltstellungen auf.The
Das schaltsymbol für das beschriebene Wegeventil 10 als
Baueinheit ist in Figur 3 gezeichnet. Demnach stellt das
Wegeventil 10 ein Ventil mit vier Anschlüssen - zwei
Arbeitsanschlüssen 34, 35, einem Zulauf 30 und einem
Rücklauf 28 - dar, das von den extern angesteuerten Kolben
36 und 37 in zwei Schaltstellungen verbringbar ist. In
diesen beiden Schaltstellungen sind die Arbeitsanschlüsse
34, 35 wechselweise mit dem Zulauf 30 oder dem Rücklauf 28
gekoppelt. Eine Umsteuerung des Wegeventils 10 erfolgt von
außen, beispielsweise durch Druckimpulse auf die beiden
Betätigungskolben 36, 37; Rückstellvorrichtungen sind nicht
vorhanden, so daß es sich um zwei bistabile Schaltstellungen
handelt, die auch nach Wegfall der Ansteuerimpulse erhalten
bleiben. The switching symbol for the
Selbstverständlich sind Änderungen oder Ergänzungen am
beschriebenen Ausführungsbeispiel möglich, ohne vom
Grundgedanken der Erfindung abzuweichen. Dieser besteht
darin, ein Wegeventil 10 zu schaffen, das bei möglichst
kompakten Außenabmessungen einfach baut, kostengünstig
herzustellen ist, verblockbar ist und kurze Schaltzeiten
aufweist.Of course, changes or additions to the
described embodiment possible without
Deviate basic ideas of the invention. This exists
in creating a
Claims (9)
- Pulse-controlled, pneumatic 4/2 directional valve (10), in particular for driving a double-action consumer, with a housing (11), which comprises besides controlling connections at least a return pass (28), two operating connections (34, 35) and a supply (30) and with a valve arrangement (12, 13), which is switchable by means of driving pulses into two bistable switching positions in which the operating connections (34, 35) are alternately connected to the supply (30) or to the return pass (28),
characterized in that the valve arrangement comprises two 3/2 on-off-valves (12, 13) which are pneumatically connected to each other, wherein the first 3/2 on-off-valve (12) is a bistable sliding valve and the second 3/2 on-off-valve (13) is a monostable seat valve. - Pulse-controlled, pneumatic 4/2 directional valve according to claim 1,
characterized in that the two 3/2 on-off-valves (12, 13) are respectively assigned to one of the operating connections (34, 35) of the directional valve (10) and that the operating connection (34) assigned to the first on-off-valve (12) is placed in parallel to the controlling connection of the second on-off-valve (13). - Pulse-controlled, pneumatic 4/2 directional valve according to one of claims 1 or 2,
characterized in that the second on-off-valve (13) comprises a pressure spring (48) which urges the second on-off-valve (13) back into its basic position after driving took place. - Pulse-controlled, pneumatic 4/2 directional valve according to one of claims 1 to 3,
characterized in that the first on-off-valve (12) can be driven externally. - Pulse-controlled, pneumatic 4/2 directional valve according to one of claims 1 to 4,
characterized in that the two on-off-valves (12, 13) are arranged side by side in recesses (18, 20) of the housing (11) and that the two recesses (18, 20) are extending essentially parallel to each other. - Pulse-controlled, pneumatic 4/2 directional valve according to one of claims 1 to 5,
characterized in that the second on-off-valve (13) is a flat seat valve. - Pulse-controlled, pneumatic 4/2 directional valve according to one of claims 1 to 6,
characterized in that for the supply, respectively for the unloading of the directional valve (10) with a pressure medium, the at least one return pass (28) and the supply (30) are realized as passage recesses which start respectively at side faces of the housing (11) which are opposite to each other and which discharge in pressure chambers (46a and 46b) of the first on-off-valve (12) and that the operating connections (34, 35) are provided essentially perpendicular to the return passage, respectively the supply (28, 30), at a common front face of the housing (11). - Pulse-controlled, pneumatic 4/2 directional valve according to claim 7,
characterized in that the housing (11) is discoidal and is joinable by means of adjacent valve housings to valve blocks which are commonly supplied and unloaded with the pressure medium. - Pulse-controlled, pneumatic 4/2 directional valve according to one of claims 1 to 8,
characterized in that, that in the basic position of the directional valve (10), the two on-off-valves (12, 13) are coupled such that the first on-off-valve (12) releases the first operating connection (34) to the return pass (28) and shuts off the supply (30), whereas the second on-off-valve (13) connects the second operating connection (35) with the supply (30) and shuts the return pass (28) off, and that this switching of the directional valve (10) is reversible by means of control pulses.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19841056A DE19841056A1 (en) | 1998-09-09 | 1998-09-09 | Pulse-controlled pneumatic 4/2-way valve |
| DE19841056 | 1998-09-09 | ||
| PCT/DE1999/002580 WO2000014414A1 (en) | 1998-09-09 | 1999-08-17 | Pulse-actuated pneumatic 4/2 directional valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1042616A1 EP1042616A1 (en) | 2000-10-11 |
| EP1042616B1 true EP1042616B1 (en) | 2002-11-06 |
Family
ID=7880268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99952432A Expired - Lifetime EP1042616B1 (en) | 1998-09-09 | 1999-08-17 | Pulse-actuated pneumatic 4/2 directional valve |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1042616B1 (en) |
| JP (1) | JP2002524697A (en) |
| DE (2) | DE19841056A1 (en) |
| HU (1) | HU224252B1 (en) |
| WO (1) | WO2000014414A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915183A (en) * | 2010-07-01 | 2010-12-15 | 北京航空航天大学 | Double-working-condition stepped flow control valve and design method of control structure thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10301119C5 (en) | 2003-01-14 | 2018-04-05 | Wabco Gmbh | Air suspension system |
| CN108488125B (en) * | 2018-03-21 | 2019-12-17 | 洛阳世英机械制造有限公司 | Integrative rotation type control valve of multi-functional flashlight |
| CN110522982B (en) * | 2019-09-26 | 2024-02-20 | 泰州市久信医疗科技有限公司 | Single-input double-output gas flow regulating device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1012961A (en) * | 1963-10-28 | 1965-12-15 | Hamilton Controllers Ltd | Improvements in pneumatic control valves |
| DE2510151A1 (en) * | 1975-03-08 | 1976-09-09 | Knorr Bremse Gmbh | Control valve for double acting cylinders - has valves between compressed air connection and working line and ventilation connections |
| FR2328147A1 (en) * | 1975-10-17 | 1977-05-13 | Reolon Noe | Control valve for double acting jacks - has sliding balls actuated by pressure operated membranes and seating on ring seals |
| DE3107012A1 (en) * | 1981-02-25 | 1982-11-04 | Bochumer Eisenhütte Heintzmann GmbH & Co, 4630 Bochum | Slide valve for oil in water emulsions |
| DE3216809A1 (en) * | 1982-05-05 | 1983-11-10 | Robert Bosch Gmbh, 7000 Stuttgart | DIRECTIONAL VALVE THAT IS DESIGNED FOR DIFFERENT OPERATING MODES |
| DE4400760C2 (en) * | 1994-01-13 | 1997-03-27 | Festo Kg | Multi-way valve |
| DE19649833A1 (en) * | 1996-12-02 | 1998-06-04 | Bosch Gmbh Robert | Electro-hydraulic control device |
-
1998
- 1998-09-09 DE DE19841056A patent/DE19841056A1/en not_active Withdrawn
-
1999
- 1999-08-17 JP JP2000569131A patent/JP2002524697A/en not_active Withdrawn
- 1999-08-17 HU HU0100339A patent/HU224252B1/en not_active IP Right Cessation
- 1999-08-17 WO PCT/DE1999/002580 patent/WO2000014414A1/en active IP Right Grant
- 1999-08-17 DE DE59903313T patent/DE59903313D1/en not_active Expired - Fee Related
- 1999-08-17 EP EP99952432A patent/EP1042616B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915183A (en) * | 2010-07-01 | 2010-12-15 | 北京航空航天大学 | Double-working-condition stepped flow control valve and design method of control structure thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19841056A1 (en) | 2000-03-23 |
| DE59903313D1 (en) | 2002-12-12 |
| HUP0100339A2 (en) | 2001-06-28 |
| EP1042616A1 (en) | 2000-10-11 |
| JP2002524697A (en) | 2002-08-06 |
| HU224252B1 (en) | 2005-07-28 |
| WO2000014414A1 (en) | 2000-03-16 |
| HUP0100339A3 (en) | 2001-11-28 |
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