EP1068124B1 - Device for displacing the moveable parts of rail switches or crossings - Google Patents

Device for displacing the moveable parts of rail switches or crossings Download PDF

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Publication number
EP1068124B1
EP1068124B1 EP99912958A EP99912958A EP1068124B1 EP 1068124 B1 EP1068124 B1 EP 1068124B1 EP 99912958 A EP99912958 A EP 99912958A EP 99912958 A EP99912958 A EP 99912958A EP 1068124 B1 EP1068124 B1 EP 1068124B1
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EP
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Prior art keywords
cylinder piston
hydraulic cylinder
piston unit
pressure
series
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EP99912958A
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German (de)
French (fr)
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EP1068124A1 (en
Inventor
Herbert Achleitner
Josef Hörtler
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Voestalpine Railway Systems GmbH
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Voestalpine VAE GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/04—Fluid-pressure devices for operating points or scotch-blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/04—Fluid-pressure devices for operating points or scotch-blocks
    • B61L5/045—Fluid-pressure devices for operating points or scotch-blocks using electrically controlled fluid-pressure operated driving means
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass

Definitions

  • the invention relates to a device for switching the moving parts of rail switches or crossings, at which a plurality of attacking offset in the longitudinal direction of the rail hydraulic cylinder piston units each in Series is switched, being in the line which the in series connected hydraulic cylinder-piston units, at least one pressure-dependent adjustable directional or seat valve is switched on
  • a device of the type mentioned is, for example already to be found in WO 96/34786.
  • a plurality of cylinder-piston units are used to switch switches provided which are parallel to each other or can be connected in series.
  • Cylinder-piston units are connected in series are in the WO 96/34786 described poppet valves which ensure that after a complete conversion of a hydraulic cylinder piston unit the hydraulic pressure required for the changeover immediately into the corresponding workrooms below hydraulic cylinder piston units is directed. While the adjustment is followed by the actuation of hydraulic Cylinder-piston units usually by pressure from a previous hydraulic cylinder piston unit displaced volume of fluid.
  • the invention now aims to set up a device mentioned type with hydraulic cylinder piston units connected in series to further train that inadmissible Operating conditions are recognized early and in good time and that when the permissible resistance is exceeded, which has an effect on a hydraulic cylinder piston unit, a further adjustment of the point machine is interrupted becomes.
  • Training essentially characterized in that the way or seat valve when a preset difference is exceeded the pressures in opposite work rooms of the same, upstream cylinder piston unit the connection locks to the following cylinder piston unit.
  • the pressure-dependent adjustable directional or seat valve which in the line that connects the hydraulic series Connects cylinder piston units with each other, switched on is, when a preset difference is exceeded Press in opposite work rooms of the same, upstream Cylinder-piston unit blocks, can be impermissible Increases in differential pressure, as they occur due to a increased displacement resistance, recognize in time and in that in these cases the connection to the subsequent cylinder piston unit is locked, a safe shutdown of the further adjustment movement of the switch, so that inadmissible deformations can be excluded.
  • the training is made such that a pressure-dependent adjustable directional or seat valve is switched on in the supply line and in the discharge line of at least one hydraulic cylinder piston unit, the displacement drive of which is acted upon by the pressure in different working spaces of the same cylinder piston unit, particularly in Particularly advantageously, the circuit is carried out so that the valves of the individual cylinder piston units are each switched so that the valve opening into a working chamber is acted upon by the pressure in the opposite working chamber of the same cylinder piston unit.
  • a working pressure p1 comes into effect in each hydraulic cylinder piston unit, which is intended to displace the piston in the direction of the adjustment movement.
  • This working pressure p1 which multiplied by the effective piston cross-sectional area A defines the actuating force F, is now counteracted by the force of the displacement resistance F w .
  • fluid is then pressed out under a pressure p2 corresponding to the reduction due to the force corresponding to the external resistance into the working chamber of a subsequent cylinder piston unit for the same-directional adjustment movement, this pressure difference remaining unproblematic as long as the one that occurred Adjustment resistance remains within defined limits.
  • the directional and seat valves with the respective pressure difference can be directly combined with one hydraulic cylinder-piston unit to form a single unit and react to impermissible operating conditions that can occur in connection with a single one of a plurality of hydraulic cylinder-piston units connected in series.
  • the last of a plurality of series connected hydraulic cylinder piston units can be used without additional Valves can be formed, the in a particularly simple manner Training is taken so that the last in series hydraulic cylinder piston unit directly with the valves is connected by previous cylinder piston units.
  • FIG. 1 shows a schematic illustration of a A number of hydraulic cylinder piston units connected in series for the adjustment of rail switches and Fig. 2 an enlarged detail of the hydraulic used in Fig. 1 Cylinder-piston units and the valve control.
  • FIG. 1 shows hydraulic cylinder piston units 1 to 4 shown, which over the length of the switch to be adjusted are arranged distributed in the longitudinal direction of the rail.
  • a switch tongue in the direction of arrow 5 becomes fluid via a line 6 into the first work space 7 of the first hydraulic cylinder piston unit 1, which Fluid emerging from the opposite work area the line 8 with the interposition of a pressure difference Valves 9 in the work space 20 of the downstream hydraulic cylinder-piston unit 3 arrives.
  • the pistons 11, 12, 13 and 14 of the hydraulic series connected Cylinder-piston units each have blow-open valves 15 on the opening at the end of the permissible displacement of the previous work area to the pressure line to the next one Workspace of another hydraulic cylinder piston unit cause.
  • a correspondingly reduced pressure p2 is available here, which is lower than the pressure p1 in the working space 7.
  • the pressure difference signal actuates the downstream valve 9, so that the line 19 is blocked when the permissible value is exceeded.
  • the blocking of this valve takes place, for example, in an intermediate position, as shown in FIG. 2, in which the poppet valves 15 have not yet been actuated and therefore a corresponding pressure difference between the working spaces 7 and 18 actually occurs.
  • the switch tongue to be actuated is shown schematically in FIG. 2 at 21 indicated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Seats For Vehicles (AREA)
  • Escalators And Moving Walkways (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Actuator (AREA)
  • Regulating Braking Force (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Railway Tracks (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Adornments (AREA)
  • Rehabilitation Tools (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

In a device for displacing the movable parts of rail switches or crossings, in which a plurality of hydraulic cylinder piston units engaging in an offset manner in the longitudinal direction of the rails are each connected in series, at least one directional or seat valve (9) capable of being adjusted in a pressure controlled manner is inserted in the duct (8) that connects the hydraulic cylinder piston units (1 to 4) arranged in series, which directional or seat valve blocks the connection to the consecutive cylinder piston unit if a preset differential pressure is exceeded.

Description

Die Erfindung bezieht sich auf eine Einrichtung zum Umstellen der beweglichen Teile von Schienenweichen oder -kreuzungen, bei welcher eine Mehrzahl von in Schienenlängsrichtung versetzt angreifenden hydraulischen Zylinderkolbenaggregaten jeweils in Serie geschaltet ist, wobei in die Leitung, welche die in Serie geschalteten hydraulischen Zylinderkolbenaggregate verbindet, wenigstens ein druckabhängig verstellbares Wege- bzw. Sitzventil eingeschaltet istThe invention relates to a device for switching the moving parts of rail switches or crossings, at which a plurality of attacking offset in the longitudinal direction of the rail hydraulic cylinder piston units each in Series is switched, being in the line which the in series connected hydraulic cylinder-piston units, at least one pressure-dependent adjustable directional or seat valve is switched on

Eine Einrichtung der eingangs genannten Art ist beispielsweise der WO 96/34786 bereits zu entnehmen. Bei dieser bekannten Einrichtung zum Umstellen von Weichen sind eine Mehrzahl von Zylinderkolbenaggregaten vorgesehen, welche zueinander parallel oder in Serie geschaltet sein können. Für den Fall, daß derartige Zylinderkolbenaggregate in Serie geschaltet werden, sind in der WO 96/34786 Aufstoßventile beschrieben, welche sicherstellen, daß nach vollständiger Umstellung eines hydraulischen Zylinderkolbenaggregates der für die Umstellung erforderliche Hydraulikdruck unmittelbar in die entsprechenden Arbeitsräume nachfolgender hydraulischer Zylinderkolbenaggregate geleitet wird. Während der Verstellung erfolgt die Betätigung nachgeschalteter hydraulischer Zylinderkolbenaggregate üblicherweise durch den Druck des aus einem vorangehenden hydraulischen Zylinderkolbenaggregat verdrängten Fluidvolumens.A device of the type mentioned is, for example already to be found in WO 96/34786. With this known device a plurality of cylinder-piston units are used to switch switches provided which are parallel to each other or can be connected in series. In the event that such Cylinder-piston units are connected in series are in the WO 96/34786 described poppet valves which ensure that after a complete conversion of a hydraulic cylinder piston unit the hydraulic pressure required for the changeover immediately into the corresponding workrooms below hydraulic cylinder piston units is directed. While the adjustment is followed by the actuation of hydraulic Cylinder-piston units usually by pressure from a previous hydraulic cylinder piston unit displaced volume of fluid.

Bei der Umstellung von beweglichen Teilen von Schienenweichen bzw. -kreuzungen wirkt zunächst in einem der Arbeitsräume des entsprechenden Stellzylinders der angelegte Druck; wobei dieser Druck multipliziert mit der jeweils wirksamen Kolbenfläche die Stellkraft ergibt. Dieser Stellkraft wirken Verstellwiderstände entgegen, wobei derartige Widerstände, insbesondere bei einer Blockade der Verstellbewegung, zu einem raschen Druckanstieg führen können. Zur Sicherung der Gesamthydraulik ist es daher bekannt, zentral Druckbegrenzungsventile vorzusehen und eine derartige Ausbildung ist beispielsweise in der DE 21 44 564 A1 beschrieben. Unzulässige Betriebszustände können aber mit einem derartigen Druckbegrenzungsventil nur unzureichend erfaßt werden, da derartige Druckbegrenzungsventile auf einen Arbeitsdruck ausgelegt werden müssen, welcher höher ist als die Summe der Verschiebewiderstände bzw. Widerstandskräfte der in Serie geschalteten hydraulischen Zylinderkolbenaggregate.When converting moving parts of rail switches crossings or crossings initially work in one of the workrooms of the corresponding pressure cylinder the applied pressure; being this Pressure multiplied by the effective piston area Force results. Adjusting resistances act on this force contrary, such resistances, especially in a Blockage of the adjustment movement, to a rapid increase in pressure being able to lead. It is therefore to secure the overall hydraulics known to provide central pressure relief valves and a such training is for example in DE 21 44 564 A1 described. Impermissible operating states can, however, with a such a pressure relief valve is insufficiently detected be such pressure relief valves to a working pressure must be interpreted, which is higher than the sum the displacement resistances or resistance forces of the series switched hydraulic cylinder piston units.

Bei der aus der EP 778 191 A2 bekanntgewordenen Einrichtung sind sicherheitseinrichtungen vorgesehen, welche die einzelnen Zylinderkolbenaggregate bei Abschaltung der Verschiebebewegung soweit drucklos machen, daß thermischen Ausdehnungen Rechnung getragen werden kann. Eine Sicherheitsabschaltung beim Überschreiten unzulässiger Betriebszustände einzelner Zylinderkolbenaggregate ist mit einer derartigen Ausbildung nicht gegeben.In the device which has become known from EP 778 191 A2 safety devices are provided, which the individual cylinder piston units when switching off the displacement movement so far depressurize that thermal expansions are taken into account can be. A safety shutdown when exceeded impermissible operating states of individual cylinder piston units is not given with such training.

Die Erfindung zielt nun darauf ab, eine Einrichtung der eingangs genannten Art mit in Serie geschalteten hydraulischen Zylinderkolbenaggregaten dahingehend weiterzubilden, daß unzulässige Betriebszustände frühzeitig und rechtzeitig erkannt werden und daß bei Überschreiten der zulässigen Widerstandskraft, welche auf ein hydraulisches Zylinderkolbenaggregat zur Wirkung gelangt, eine weitere Verstellung des Weichenantriebes unterbrochen wird. Zur Lösung dieser Aufgabe ist die erfindungsgemäße Ausbildung im wesentlichen dadurch gekennzeichnet, daß das Wege- bzw. Sitzventil bei Überschreiten einer voreingestellten Differenz der Drücke in gegenüberliegenden Arbeitsräumen des gleichen, vorgeschalteten Zylinderkolbenaggregates die Verbindung zum nachfolgenden Zylinderkolbenaggregat sperrt. Dadurch, daß das druckabhängig verstellbare Wege- bzw. Sitzventil, welches in die Leitung, welche die in Serie geschalteten hydraulischen Zylinderkolbenaggregate untereinander verbindet, eingeschaltet ist, bei Überschreiten einer voreingestellten Differenz der Drücke in gegenüberliegenden Arbeitsräumen des gleichen, vorgeschalteten Zylinderkolbenaggregates sperrt, lassen sich unzulässige Anstiege des Differenzdruckes, wie sie aufgrund eines erhöhten Verschiebewiderstandes auftreten, rechtzeitig erkennen und dadurch, daß in diesen Fällen unmittelbar die Verbindung zum nachfolgenden Zylinderkolbenaggregat gesperrt ist, erfolgt eine sichere Abschaltung der weiteren Verstellbewegung der Weiche, sodaß unzulässige Verformungen ausgeschlossen werden können. The invention now aims to set up a device mentioned type with hydraulic cylinder piston units connected in series to further train that inadmissible Operating conditions are recognized early and in good time and that when the permissible resistance is exceeded, which has an effect on a hydraulic cylinder piston unit, a further adjustment of the point machine is interrupted becomes. To solve this problem is the invention Training essentially characterized in that the way or seat valve when a preset difference is exceeded the pressures in opposite work rooms of the same, upstream cylinder piston unit the connection locks to the following cylinder piston unit. As a result of that the pressure-dependent adjustable directional or seat valve, which in the line that connects the hydraulic series Connects cylinder piston units with each other, switched on is, when a preset difference is exceeded Press in opposite work rooms of the same, upstream Cylinder-piston unit blocks, can be impermissible Increases in differential pressure, as they occur due to a increased displacement resistance, recognize in time and in that in these cases the connection to the subsequent cylinder piston unit is locked, a safe shutdown of the further adjustment movement of the switch, so that inadmissible deformations can be excluded.

Mit Vorteil ist die Ausbildung hiebei so getroffen, daß in die Zuleitung und in die Ableitung wenigstens eines hydraulischen Zylinderkolbenaggregates je ein druckabhängig verstellbares Wege- bzw. Sitzventil eingeschaltet ist, dessen Verschiebeantrieb vom Druck in voneinander verschiedenen Arbeitsräumen des gleichen Zylinderkolbenaggregates beaufschlagt ist, wobei insbesondere in besonders vorteilhafter Weise die Schaltung so vorgenommen wird, daß die Ventile der einzelnen Zylinderkolbenaggregate jeweils so geschaltet sind, daß das in einen Arbeitsraum mündende Ventil vom Druck im gegenüberliegenden Arbeitsraum des gleichen Zylinderkolbenaggregates beaufschlagt ist. Für die Verstellung eines beweglichen Teiles einer Schienenweiche oder -kreuzung gelangt in jeweils einem hydraulischen Zylinderkolbenaggregat ein Arbeitsdruck p1 zur Wirkung, welcher den Kolben in Richtung der Verstellbewegung verschieben soll. Diesem Arbeitsdruck p1, welcher multipliziert mit der jeweils wirksamen Kolbenquerschnittsfläche A die Stellkraft F definiert, wirkt nun die Kraft des Verschiebewiderstandes Fw entgegen. Aus dem dem mit dem Druck p1 beaufschlagten Arbeitsraum gegenüberliegenden Arbeitsraum wird nun Fluid unter einem Druck p2 entsprechend der Verringerung durch die dem äußeren Widerstand entsprechende Kraft in den Arbeitsraum eines nachfolgenden Zylinderkolbenaggregates für die gleichsinnige Verstellbewegung ausgepreßt, wobei diese Druckdifferenz solange unproblematisch bleibt, solange der aufgetretene Verstellwiderstand in definierten Grenzen bleibt. Im einzelnen gelten hiebei folgende Beziehungen p1 · A = p2 · A + Fw (p1 - P2) A = Fw Δp · A = Fw wobei in diesen Gleichungen p1 den Arbeitsdruck im jeweils betrachteten Zylinderkolbenaggregat und p2 den Druck des aus dem gegenüberliegenden Arbeitsraum des gleichen Zylinderkolbenaggregates verdrängten Fluids bedeutet. Die auftretende Druckdifferenz ist hiebei dem Verschiebewiderstand proportional, wobei dadurch, daß diese Druckdifferenz nun zur Steuerung des entsprechenden Ventiles herangezogen wird, dann, wenn diese Druckdifferenz einen vorbestimmten Wert übersteigt, die Leitung zum nachfolgenden hydraulischen Zylinderkolbenaggregat gesperrt wird. Die mit der jeweiligen Druckdifferenz beaufschlagten Wege- bzw. Sitzventile können hierbei unmittelbar mit jeweils einem hydraulischen Zylinderkolbenaggregat zu einer Baueinheit vereinigt werden und auf unzulässige Betriebszustände reagieren, wie sie im Zusammenhang mit einem einzelnen einer Mehrzahl von in Serie geschalteten hydraulischen Zylinderkolbenaggregat auftreten können.Advantageously, the training is made such that a pressure-dependent adjustable directional or seat valve is switched on in the supply line and in the discharge line of at least one hydraulic cylinder piston unit, the displacement drive of which is acted upon by the pressure in different working spaces of the same cylinder piston unit, particularly in Particularly advantageously, the circuit is carried out so that the valves of the individual cylinder piston units are each switched so that the valve opening into a working chamber is acted upon by the pressure in the opposite working chamber of the same cylinder piston unit. For the adjustment of a movable part of a rail switch or crossover, a working pressure p1 comes into effect in each hydraulic cylinder piston unit, which is intended to displace the piston in the direction of the adjustment movement. This working pressure p1, which multiplied by the effective piston cross-sectional area A defines the actuating force F, is now counteracted by the force of the displacement resistance F w . From the working chamber opposite the pressure p1 pressurized, fluid is then pressed out under a pressure p2 corresponding to the reduction due to the force corresponding to the external resistance into the working chamber of a subsequent cylinder piston unit for the same-directional adjustment movement, this pressure difference remaining unproblematic as long as the one that occurred Adjustment resistance remains within defined limits. The following relationships apply here in detail p1A = p2A + F w (p1 - P2) A = Fw ΔpA = F w where in these equations p1 is the working pressure in the cylinder piston unit in question and p2 is the pressure of the fluid displaced from the opposite working space of the same cylinder piston unit. The pressure difference that occurs is proportional to the displacement resistance, the fact that this pressure difference is now used to control the corresponding valve, when this pressure difference exceeds a predetermined value, the line to the subsequent hydraulic cylinder piston unit is blocked. The directional and seat valves with the respective pressure difference can be directly combined with one hydraulic cylinder-piston unit to form a single unit and react to impermissible operating conditions that can occur in connection with a single one of a plurality of hydraulic cylinder-piston units connected in series.

Das jeweils letzte einer Mehrzahl von in Serie geschalteter hydraulischer Zylinderkolbenaggregaten kann ohne zusätzliche Ventile ausgebildet sein, wobei in besonders einfacher Weise die Ausbildung so getroffen ist, daß das in Serienschaltung letzte hydraulische Zylinderkolbenaggregat unmittelbar mit den Ventilen von vorangehenden Zylinderkolbenaggregaten verbunden ist.The last of a plurality of series connected hydraulic cylinder piston units can be used without additional Valves can be formed, the in a particularly simple manner Training is taken so that the last in series hydraulic cylinder piston unit directly with the valves is connected by previous cylinder piston units.

Insgesamt wird mit der erfindungsgemäßen Ausbildung immer das nachgeschaltete Ventil geschlossen, wenn die aufgetretene Druckdifferenz das zulässige Ausmaß, welches durch die Widerstände im normalen Betriebsfall definiert ist, erreicht hat. Um nun die Leitungswiderstände bei einer Mehrzahl von derartigen in Serie geschalteten hydraulischen Zylinderkolbenaggregaten zu minimieren, ist es vorteilhaft die Länge der jeweiligen Rücklaufleitungen zu verringern. Zu diesem Zweck ist mit Vorteil die Ausbildung so getroffen, daß bei mehr als drei in Serie geschalteten hydraulischen Zylinderkolbenaggregaten die Serienschaltung so vorgenommen ist, daß der Arbeitsraum eines hydraulischen Zylinderkolbenaggregates mit dem Arbeitsraum eines übernächsten hydraulischen Zylinderkolbenaggregates unter Zwischenschaltung der Ventile verbunden ist. Auf diese Weise kann die Länge der Rücklaufleitungen jeweils minimiert werden, sodaß ein präzises Ansprechen gewährleistet ist.Overall, with the training according to the invention that will always be downstream valve closed when the pressure difference occurred the permissible extent, which is determined by the resistances in the normal operating case is defined. To now the Line resistances in a plurality of such in series to minimize switched hydraulic cylinder piston units, it is advantageous the length of the respective return lines to reduce. For this purpose, the Training taken so that more than three connected in series hydraulic cylinder piston units the series connection is made so that the working space of a hydraulic Cylinder-piston unit with the work space of the next hydraulic cylinder piston unit with interposition the valves are connected. In this way, the length of the Return lines are minimized, so that a precise Response is guaranteed.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispieles näher erläutert. In dieser zeigen Fig. 1 eine schematische Darstellung einer Mehrzahl von in Serie geschalteten hydraulischen Zylinderkolbenaggregaten für die Verstellung von Schienenweichen und Fig. 2 ein vergrößertes Detail der in Fig. 1 verwendeten hydraulischen Zylinderkolbenaggregate sowie der Ventilsteuerung.The invention is described below with reference to a drawing schematically illustrated embodiment. 1 shows a schematic illustration of a A number of hydraulic cylinder piston units connected in series for the adjustment of rail switches and Fig. 2 an enlarged detail of the hydraulic used in Fig. 1 Cylinder-piston units and the valve control.

In Fig. 1 sind hydraulische Zylinderkolbenaggregate 1 bis 4 dargestellt, welche über die Länge der zu verstellenden Weiche in Schienenlängsrichtung verteilt angeordnet sind. Zur Verstellung einer Weichenzunge in Richtung des Pfeiles 5 wird Fluid über eine Leitung 6 in den ersten Arbeitsraum 7 des ersten hydraulischen Zylinderkolbenaggregates 1 eingepreßt, wobei das aus dem gegenüberliegenden Arbeitsraum austretende Fluid über die Leitung 8 unter Zwischenschaltung eines druckdifferenzbeaufschlagten Ventiles 9 in den Arbeitsraum 20 des nachgeschalteten hydraulischen Zylinderkolbenaggregates 3 gelangt.1 shows hydraulic cylinder piston units 1 to 4 shown, which over the length of the switch to be adjusted are arranged distributed in the longitudinal direction of the rail. For adjustment a switch tongue in the direction of arrow 5 becomes fluid via a line 6 into the first work space 7 of the first hydraulic cylinder piston unit 1, which Fluid emerging from the opposite work area the line 8 with the interposition of a pressure difference Valves 9 in the work space 20 of the downstream hydraulic cylinder-piston unit 3 arrives.

Die Kolben 11, 12, 13 und 14 der in Serie geschalteten hydraulischen Zylinderkolbenaggregate weisen jeweils Aufstoßventile 15 auf, welche am Ende des zulässigen Verschiebeweges die Öffnung des vorangehenden Arbeitsraumes zur Druckleitung zum nachfolgenden Arbeitsraum eines weiteren hydraulischen Zylinderkolbenaggregates bewirken.The pistons 11, 12, 13 and 14 of the hydraulic series connected Cylinder-piston units each have blow-open valves 15 on the opening at the end of the permissible displacement of the previous work area to the pressure line to the next one Workspace of another hydraulic cylinder piston unit cause.

Das aus den jeweils gegenüberliegenden Arbeitsräumen verdrängte Fluid gelangt jeweils unter Zwischenschaltung entsprechender von der Druckdifferenz betätigbarer Ventile in die Rücklaufleitung 16, wobei an die Vorlaufleitung 6 die Pumpe 22 oder ein Druckspeicher angeschlossen ist und an die Rücklaufleitung 16 die Leitung zum Tank 23 angeschlossen ist. Für die Betätigung in eine Verschieberichtung entgegen der Richtung des Pfeiles 5 werden die Anschlüsse jeweils beispielsweise durch ein Ventil entsprechend vertauscht.That displaced from the opposite work rooms Fluid arrives in each case with the interposition of corresponding the pressure difference of actuable valves in the return line 16, the pump 22 or a pressure accumulator being connected to the feed line 6 is connected and to the return line 16 Line to the tank 23 is connected. For actuation in a direction of displacement against the direction of arrow 5 the connections are each made, for example, by a valve swapped accordingly.

Bei der in Fig. 2 dargestellt vergrößerten Darstellung eines derartigen hydraulischen Zylinderkolbenaggregates 1 sind die Druckverhältnisse näher erläutert. Der Druck, welcher die Verstellkraft zur Folge haben soll, wird über die Druckleitung 6 und ein erstes druckmittelbetätigbares Ventil 17 in den Arbeitsraum 7 des hydraulischen Zylinderkolbenaggregates 1 eingebracht und bewirkt unter Berücksichtigung der wirksamen Fläche des Kolbens 11 eine Stellkraft. Aus dem gegenüberliegenden Arbeitsraum 18 wird Fluid unter Zwischenschaltung des druckdifferenzbetätigbaren Ventiles 9 in die Leitung 19 zu einem nachgeschalteten Arbeitsraum, welcher, wie in Fig. 1 ersichtlich, dem Arbeitsraum 20 des übernächsten hydraulischen Zylinderkolbenaggregates 3 entspricht. Bedingt durch die Verschiebewiderstände und die dadurch erzielte entgegengerichtete Kraft Fw steht hier ein entsprechend verringerter Druck p2 zur Verfügung, welcher kleiner ist als der Druck p1 im Arbeitsraum 7. Das Druckdifferenzsignal betätigt jeweils das nachgeschaltete Ventil 9, sodaß die Leitung 19 gesperrt wird, wenn der zulässige Wert überschritten wird. Die Sperre dieses Ventiles erfolgt hiebei beispielsweise in einer Zwischenstellung, wie sie in Fig. 2 dargestellt ist, bei welcher die Aufstoßventile 15 noch nicht betätigt wurden und daher tatsächlich eine entsprechende Druckdifferenz zwischen den Arbeitsräumen 7 und 18 auftritt.In the enlarged representation of such a hydraulic cylinder-piston unit 1 shown in FIG. 2, the pressure conditions are explained in more detail. The pressure, which should result in the adjusting force, is introduced via the pressure line 6 and a first pressure-actuatable valve 17 into the working space 7 of the hydraulic cylinder-piston unit 1 and, taking into account the effective area of the piston 11, causes an actuating force. From the opposite working chamber 18, fluid is interposed, by interposing the pressure differential actuable valve 9 in the line 19, to a downstream working chamber which, as can be seen in FIG. 1, corresponds to the working chamber 20 of the hydraulic cylinder piston unit 3 after next. Due to the displacement resistances and the resulting opposite force F w , a correspondingly reduced pressure p2 is available here, which is lower than the pressure p1 in the working space 7. The pressure difference signal actuates the downstream valve 9, so that the line 19 is blocked when the permissible value is exceeded. The blocking of this valve takes place, for example, in an intermediate position, as shown in FIG. 2, in which the poppet valves 15 have not yet been actuated and therefore a corresponding pressure difference between the working spaces 7 and 18 actually occurs.

Die zu betätigende Weichenzunge ist schematisch in Fig. 2 mit 21 angedeutet.The switch tongue to be actuated is shown schematically in FIG. 2 at 21 indicated.

Durch die von der Druckdifferenz abhängige Betätigung des Ventiles 9 wird die weitere Verstellung der Weichenzunge 21 verhindert und ein unzulässiger Betriebszustand frühzeitig und rechtzeitig erkannt sowie eine Überlastung verhindert.By actuating the valve depending on the pressure difference 9 the further adjustment of the switch tongue 21 is prevented and an impermissible operating condition early and in time recognized and an overload prevented.

Dadurch, daß die Leitung 19 nicht unmittelbar mit dem nächstfolgenden sondern mit dem übernächsten hydraulischen Zylinderkolbenaggregat verbunden ist, wird insgesamt eine Verringerung der jeweils wirksam werdenden Länge der Rücklaufleitungen bewirkt, wodurch die Leitungsverluste verringert werden können.Because line 19 is not immediately connected to the next one but with the next but one hydraulic cylinder piston unit connected, there will be an overall decrease the effective length of the return lines causes, whereby the line losses can be reduced.

Claims (5)

  1. A device for displacing the movable parts of rail switches or crossings, in which a plurality of hydraulic cylinder piston units (1, 2, 3, 4) engaging in an offset manner in the longitudinal direction of the rails are each connected in series, wherein at least one directional or seat valve (9) capable of being adjusted in a pressure controlled manner is inserted in the duct (8) that connects the hydraulic cylinder piston units (1, 2, 3, 4) arranged in series, characterized in that directional or seat valve (9) blocks the connection to the consecutive cylinder piston unit if a preset difference between the pressures prevailing in opposite working volumes of the same preceding cylinder piston unit is exceeded.
  2. A device according to claim 1, characterized in that a directional or seat valve (9) capable of being adjusted in a pressure controlled manner is each inserted in the supply duct and in the discharge duct of at least one hydraulic cylinder piston unit, the displacement actuator of which directional or seat valve is powered by the pressure prevailing in different working volumes (7, 18) of the same cylinder piston unit.
  3. A device according to claim 1 or 2, characterized in that the valves of the individual cylinder piston units are each controlled in a manner that the valve opening into a working volume (7) is powered by the pressure prevailing in the oppositely arranged working volume (18) of the same cylinder piston unit.
  4. A device according to claim 1, 2 or 3, characterized in that the hydraulic cylinder piston unit (4) arranged last in the series connection is connected directly with the valves of preceding cylinder piston units (1, 2, 3).
  5. A device according to any one of claims 1 to 4, characterized in that the series connection with more than three hydraulic cylinder piston units connected in series is realized in a manner that the working volume of a hydraulic cylinder piston unit is connected with the working volume of a hydraulic cylinder piston unit after next with the valves being arranged therebetween.
EP99912958A 1998-04-07 1999-03-31 Device for displacing the moveable parts of rail switches or crossings Expired - Lifetime EP1068124B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT9860398 1998-04-07
AT0060398A AT407369B (en) 1998-04-07 1998-04-07 DEVICE FOR ADJUSTING THE MOVABLE PARTS OF RAILS OR CROSSINGS
PCT/AT1999/000087 WO1999051480A1 (en) 1998-04-07 1999-03-31 Device for displacing the moveable parts of rail switches or crossings

Publications (2)

Publication Number Publication Date
EP1068124A1 EP1068124A1 (en) 2001-01-17
EP1068124B1 true EP1068124B1 (en) 2002-01-16

Family

ID=3494968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99912958A Expired - Lifetime EP1068124B1 (en) 1998-04-07 1999-03-31 Device for displacing the moveable parts of rail switches or crossings

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US (1) US6402095B1 (en)
EP (1) EP1068124B1 (en)
JP (1) JP3355183B2 (en)
KR (1) KR20010034762A (en)
AT (2) AT407369B (en)
AU (1) AU750225B2 (en)
CA (1) CA2327466C (en)
CZ (1) CZ298927B6 (en)
DE (1) DE59900640D1 (en)
DK (1) DK1068124T3 (en)
ES (1) ES2171325T3 (en)
HU (1) HU223038B1 (en)
NO (1) NO20005063L (en)
PL (1) PL191485B1 (en)
PT (1) PT1068124E (en)
WO (1) WO1999051480A1 (en)
ZA (1) ZA200005485B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700059882A1 (en) * 2017-05-31 2018-12-01 Silsud CONTROL BOX OF A RAILWAY RAILWAY AND NEEDLE HANDLING SYSTEM IN A RAILWAY SWITCH THAT ADOPTS SUCH MANEUVER CASE

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2144564A1 (en) 1971-09-06 1973-03-15 Siemens Ag TURNOUT SYSTEM FOR RAILWAY SYSTEMS WITH SLIM SWITCHES
SE510508C2 (en) * 1993-06-11 1999-05-31 Voac Hydraulics Boraas Ab Device for controlling a hydraulic motor
US5417392A (en) * 1993-10-25 1995-05-23 Wyatt; Michael L. Hydraulic switch stand with rail pump charging and hydraulic lock
CZ282833B6 (en) * 1994-06-24 1997-10-15 Vae Aktiengesellschaft Device for throwing-over the points
AT403462B (en) * 1995-05-03 1998-02-25 Vae Ag DEVICE FOR MOVING SWITCHES
DE19545784A1 (en) * 1995-12-08 1997-06-12 Sel Alcatel Ag Device for the simultaneous application of force by means of hydraulically connected hydraulic actuating units
US5772157A (en) * 1997-02-07 1998-06-30 Fluid Energy Controls, Inc. Operating railroad switches

Also Published As

Publication number Publication date
NO20005063D0 (en) 2000-10-06
WO1999051480A1 (en) 1999-10-14
CA2327466A1 (en) 1999-10-14
ZA200005485B (en) 2002-07-08
DK1068124T3 (en) 2002-04-29
ES2171325T3 (en) 2002-09-01
HUP0101471A2 (en) 2001-08-28
JP2002510581A (en) 2002-04-09
CZ298927B6 (en) 2008-03-12
ATE211979T1 (en) 2002-02-15
HUP0101471A3 (en) 2002-02-28
NO20005063L (en) 2000-12-06
HU223038B1 (en) 2004-03-01
PT1068124E (en) 2002-06-28
DE59900640D1 (en) 2002-02-21
PL191485B1 (en) 2006-05-31
AU750225B2 (en) 2002-07-11
AT407369B (en) 2001-02-26
PL343261A1 (en) 2001-07-30
KR20010034762A (en) 2001-04-25
ATA60398A (en) 2000-07-15
CZ20003622A3 (en) 2001-02-14
CA2327466C (en) 2003-05-06
EP1068124A1 (en) 2001-01-17
AU3126499A (en) 1999-10-25
US6402095B1 (en) 2002-06-11
JP3355183B2 (en) 2002-12-09

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