DE9210647U1 - Hydraulic control device - Google Patents
Hydraulic control deviceInfo
- Publication number
- DE9210647U1 DE9210647U1 DE9210647U DE9210647U DE9210647U1 DE 9210647 U1 DE9210647 U1 DE 9210647U1 DE 9210647 U DE9210647 U DE 9210647U DE 9210647 U DE9210647 U DE 9210647U DE 9210647 U1 DE9210647 U1 DE 9210647U1
- Authority
- DE
- Germany
- Prior art keywords
- control
- valve
- line
- pump
- emergency stop
- 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
Links
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
Classifications
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
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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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/002—Electrical failure
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
- F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
- F15B2211/3053—In combination with a pressure compensating valve
- F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and directional control valve
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
- F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/321—Directional control characterised by the type of actuation mechanically
- F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/35—Directional control combined with flow control
- F15B2211/353—Flow control by regulating means in return line, i.e. meter-out control
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/51—Pressure control characterised by the positions of the valve element
- F15B2211/513—Pressure control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/57—Control of a differential pressure
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief valves
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6057—Load sensing circuits having valve means between output member and the load sensing circuit using directional control valves
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/875—Control measures for coping with failures
- F15B2211/8755—Emergency shut-down
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Valve Device For Special Equipments (AREA)
Description
-&iacgr;&agr; 2495-25/SÜ-&iacgr;&agr; 2495-25/SÜ
Die Erfindiang betrifft eine hydraulische Steuervorrichtung der im Oberbegriff des Anspruchs 1 angegebenen Art.The invention relates to a hydraulic control device of the type specified in the preamble of claim 1.
Derartige hydraulische Steuervorrichtungen werden beispielsweise in Kränen oder Mobilkränen und bei anderem Hebezeug mit mehreren zu bewegenden Komponenten verwendet, um die Hydroverbraucher in ihrer Arbeitsgeschwindigkeit und Richtung über die Wegesteuerventile entsprechend zu steuern. Als Druckquelle dient eine Regelpumpe, deren Fördermenge mittels des den Lastdruck repräsentierenden Steuerdrucks an den jeweiligen Bedarf angepaßt wird. Regelpumpen haben jedoch die Eigenart, daß sie in abgeregeltem Betriebszustand einen Grunddruck von beispielsweise Bar im System aufrechternalten. Bei einer Not-Aus-Betätigung wird bei noch verstelltem Wegesteuerventil die Regelpumpe abgeregelt. Es kann dann jedoch in unerwünschter Weise der Grunddruck der Regelpumpe ausreichen, über das Wegesteuerventil den Hydroverbraucher noch zu verstellen, was eine Beschädigung oder eine Gefahrensituation herbeiführen kann. Ist ein Zulaufregler stromauf des Wegesteuerventils vorgesehen, dann kann dieser bei noch aktivem Steuerkreis Druckmittel in das Wegesteuerventil und von diesem zum Hydroverbraucher gelangen lassen.Such hydraulic control devices are used, for example, in cranes or mobile cranes and other lifting equipment with several moving components in order to control the working speed and direction of the hydraulic consumers via the directional control valves. A control pump serves as the pressure source, the delivery rate of which is adapted to the respective requirement using the control pressure representing the load pressure. However, control pumps have the peculiarity that they maintain a basic pressure of, for example, bar in the system when in a regulated operating state. In an emergency stop operation, the control pump is regulated when the directional control valve is still adjusted. However, the basic pressure of the control pump can then be sufficient, in an undesirable way, to adjust the hydraulic consumer via the directional control valve, which can cause damage or a dangerous situation. If a supply regulator is provided upstream of the directional control valve, this can allow pressure medium to flow into the directional control valve and from there to the hydraulic consumer while the control circuit is still active.
Der Erfindung liegt die Aufgabe zugrunde, eine hydraulische Steuervorrichtung der eingangs genanntenThe invention is based on the object of providing a hydraulic control device of the type mentioned
Ar~ zu schaffen, bei der bei einer Not-Aus-Betätigung unerwünschte oder gefährliche Nachlaufbewegungen eines oder mehrerer Hydroverbraucher zuverlässig vermieden werden.To create a system in which, in the event of an emergency stop, undesirable or dangerous follow-on movements of one or more hydraulic consumers are reliably avoided.
Die gestellte Aufgabe wird mit den im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmalen gelöst.The stated problem is solved with the features specified in the characterizing part of claim 1.
Bei dieser Ausbildung der hydraulischen Steuervorrichtung wird bei einer Not-Aus-Betätigung die Regelpumpe vom Trennventil von der Pumpenleitung getrennt. Der Pumpengrunddruck kann den Hydroverbraucher nicht mehr ungewollt oder unkontrolliert betätigen. Eine Einflußnahme des Trennventils auf das normale Steuerverhalten ist ausgeschlossen, da das Trennventil nur dann eingreift, wenn tatsächlich eine Not-Aus-Betätigung erfolgt ist, nach der die Steuervorrichtung ohnedies inaktiv bzw. hydraulisch blockiert ist.With this design of the hydraulic control device, the control pump is separated from the pump line by the isolation valve in the event of an emergency stop. The pump base pressure can no longer activate the hydraulic consumer in an unintentional or uncontrolled manner. The isolation valve cannot influence the normal control behavior, since the isolation valve only intervenes when an emergency stop has actually occurred, after which the control device is inactive or hydraulically blocked anyway.
Eine zweckmäßige Ausführungsform geht aus Anspruch hervor. Da das Not-Aus-Magnetventil in einer eigenen HiIfssteuerleitung angeordnet ist, arbeitet es zur Betätigung des Trennventils unabhängig von dan Betriebszuständen in der Steuervorrichtung bzw. im Steuerkreis. Da das Trennventil zusätzlich auch den Regelanschluß der Regelpumpe abtrennt, wird eine ungewolltea Verstellen der abgeregelten Betriebsstellung der Regelpumpe zuverlässig vermieden. Sine Erhöhung des Steuerdrucks im Steuerkreis, die z.B. aus dem Stillstand eines Hydroverbrauchers bei der Not-Aus-Betätigung resultiert, hat keinen Einfluß auf die Regelpumpe.A practical embodiment is shown in claim . Since the emergency stop solenoid valve is arranged in its own auxiliary control line, it operates to actuate the isolating valve independently of the operating conditions in the control device or in the control circuit. Since the isolating valve also separates the control connection of the control pump, an unintentional adjustment of the regulated operating position of the control pump is reliably avoided. An increase in the control pressure in the control circuit, which results, for example, from the standstill of a hydraulic consumer during the emergency stop actuation, has no influence on the control pump.
Eine baulich einfache, funktionssichere und kostengünstige Ausführungsform geht aus Anspruch 3A structurally simple, functionally reliable and cost-effective embodiment is given in claim 3
hervor. Das Not-Aus-Magnetventil spricht nicht nur bei einer aufgrund einer Notsituation willkürlich herbeigeführten Betätigung an, sondern auch aufgrund eines Stromausfalls. Unter Bestromung des Not-Aus-Magnetvetils wird das Trennventil bei normalem Betrieb über die Vorsteuerleitung in einer Stellung gehalten, in der die Regelpumpe mit der Pumpenleitung und der Regelanschluß mit dem Steuerkreis verbunden sind. Bei einer Not-Aus-Betätigung wird die Vorsteuerleitung zum Rücklauf entlastet, so daß das Trennventil selbsttätig in seine Trennstellung gelangt und die Regelpumpe und deren Regelanschluß isoliert.The emergency stop solenoid valve responds not only when it is arbitrarily activated due to an emergency situation, but also when there is a power failure. When the emergency stop solenoid valve is energized, the isolating valve is held in a position in which the control pump is connected to the pump line and the control connection is connected to the control circuit via the pilot line during normal operation. When an emergency stop is activated, the pilot line to the return is relieved so that the isolating valve automatically moves into its isolating position and isolates the control pump and its control connection.
Bei der Ausführungsform gemäß Anspruch 4 ist das Trennventil ein schnellansprechendes, kleinbauendes und funktionssicheres 4/2-Wegeschaltventil. In dessen erster durch Federkraft bewirkten Schaltstellung (bei einer Not-Aus-Betätigung) werden die Regelpumpe von der Pumpenleitung und der Regelanschluß vom Steuerkreis getrennt. In der bei Bestromung des Not-Aus-Magnetventils über die Vorsteuerleitung eingestellten anderen Schaltstellung ist die Regelpumpe hingegen über das Trennventil mit der Pumpenzeitung und der Regelanschluß mit dem Steuerkreis verbunden. Die Fördermenge der Regelpumpe richtet sich, z.B., nach dem jeweiligen Steuerdruck im Steuerkreis.In the embodiment according to claim 4, the isolating valve is a fast-responding, compact and reliable 4/2-way switching valve. In its first switching position, which is caused by spring force (in the event of an emergency stop operation), the control pump is separated from the pump line and the control connection is separated from the control circuit. In the other switching position, which is set when the emergency stop solenoid valve is energized via the pilot line, the control pump is connected to the pump line via the isolating valve and the control connection is connected to the control circuit. The delivery rate of the control pump depends, for example, on the respective control pressure in the control circuit.
Wichtig ist ferner die Ausfuhrungsform gemäß Anspruch 5, weil über die Lecxageleitungen eventuell durchleckendes Druckmittel abströmt und keine ungewollte Verstellung des Not-Aus-Magnetventils und/oder des Trennventils bewirken kann.The embodiment according to claim 5 is also important, because any leaking pressure medium flows away via the leakage lines and cannot cause any unwanted adjustment of the emergency stop solenoid valve and/or the isolation valve.
Ein weiterer, zweckmäßiger Gesichtspunkt geht aus Anspruch 6 hervor. Die Handbetätigung ermöglicht zurA further, useful aspect is evident from claim 6. The manual operation enables
Probe oder in einem Notfall auch eine Handbetätigung des Trennventils.Test or, in an emergency, manual operation of the isolating valve.
Bei der Ausführungsform gemäß Anspruch 7 steht am Not-Aus-Magnetventil stets genügend Druck zum ordnungsgemäßen Betätigen des Trennventils an, weil die Hilfssteuerleitung direkt von der Regelpumpe versorgt wird.In the embodiment according to claim 7, there is always sufficient pressure at the emergency stop solenoid valve to properly actuate the isolating valve because the auxiliary control line is supplied directly by the control pump.
Im Hinblick auf eine kompakte Bauweise und einfache Montage ist die Ausführungsform gemäß Anspruch 8 vorteilhaft, bei der für die verbesserte Sicherheitsfunktion nur eine einzige Ventileinheit in der Steuervorrichtung vorgesehen ist.With regard to a compact design and simple assembly, the embodiment according to claim 8 is advantageous, in which only a single valve unit is provided in the control device for the improved safety function.
Anhand der Zeichnung wird eine Ausführungsform des Erfindungsgegenstandes erläutert. Es zeigt:An embodiment of the subject matter of the invention is explained using the drawing. It shows:
Fig. 1 ein Blockschaltbild eines Teils einer hydraulischen Steuervorrichtung .Fig. 1 is a block diagram of part of a hydraulic control device.
Eine hydraulische Steuervorrichtung 1 für einen Kran, einen Mobilkran oder ein anderes Hebezeug weist miteinander verbundene und kommunizierende Anschlußblöcke 2, 3 und gegebenenfalls 4 auf. In den Anschlußblöcken 3 und 4 ist jeweils ein Wegesteuerventil 5, 6 enthalten, beispielsweise ein sogenanntes Proportional-Schiebersteuerventil mit Magnetbetätigung und/oder Handbetätigung und/oder Druckvorsteuerung. An das Wegesteuerventil 5 ist ein Hydroverbraucher 7, z.B. ein doppeltwirkender Hydraulikzylinder angeschlossen; an das Wegesteuerventil 6 ist ein Hydroverbraucher 8, z.B. ein doppeltwirkender Hydraulikzylinder angeschlossen,A hydraulic control device 1 for a crane, a mobile crane or another lifting device has connected and communicating connection blocks 2, 3 and possibly 4. The connection blocks 3 and 4 each contain a directional control valve 5, 6, for example a so-called proportional slide control valve with solenoid actuation and/or manual actuation and/or pressure pilot control. A hydraulic consumer 7, e.g. a double-acting hydraulic cylinder, is connected to the directional control valve 5; a hydraulic consumer 8, e.g. a double-acting hydraulic cylinder, is connected to the directional control valve 6.
und zwar jeweils über zwei Verbraucherleitungen 9, 10 bzw. 11, 12. An der anderen Seite jedes Wegesteuerventils 5 ist eine Pumpenleitung 13 und eine Rücklaufleitung 14 angeschlossen, die parallel mit einer Hauptpumpenleitung 15 und einer Hauptrücklaufleitung 16 zu einem Rücklauf 41 verbunden sind. In jeder Pumpenleitung 13 ist bei dieser Ausführungsform der Steuervorrichtung 1 ein Zulaufregler 37 angeordnet. Dem Wegesteuerventil 6 ist ferner eine Sicherheits-Abschalte-Ventilgruppe 38 zugeordnet, die bei Überschreiten einer Last/Hubgrenze anspricht und den in Richtung auf die Last/Hubgrenze bewegten Hydroverbraucher 8 stillsetzt.namely in each case via two consumer lines 9, 10 or 11, 12. On the other side of each directional control valve 5, a pump line 13 and a return line 14 are connected, which are connected in parallel with a main pump line 15 and a main return line 16 to form a return line 41. In this embodiment of the control device 1, an inflow regulator 37 is arranged in each pump line 13. The directional control valve 6 is also assigned a safety shut-off valve group 38, which responds when a load/stroke limit is exceeded and stops the hydraulic consumer 8 that is moving in the direction of the load/stroke limit.
An die Hauptpumpenleitung 15 ist eine Regelpumpe 19 angeschlossen, die einen Regelanschluß 20 aufweist, an dem die Fördermenge der Regelpumpe 19 eingestellt wird.A control pump 19 is connected to the main pump line 15 and has a control connection 20 at which the delivery rate of the control pump 19 is adjusted.
In den Verbraucherleitungen 9, 10; 11, 12 sind Lastdruckanzapfstellen 21, 22 vorgesehen, aus denen ein Steuerkreis 23', 23", 23 mit einem dem höheren Lastdruck entsprechenden Steuerdruck versorgt wird. Der Regelanschluß 20 der Regelpumpe 19 ist über eine Leitung 25 an den Steuerkreis 23, 23', 23" angeschlossen, wobei in den Steuerkreis 23, 23', 23" integrierte Wechselventile 24 den jeweils höheren Lastdruck in den Teil 23 des Steuerkreises 23, 23', 23" einspeisen. Im Anschlußblock 2 sind die Regelpumpe 19 an eine Nebenpumpenleitung 15a und der Rücklauf 41 an eine Nebenrücklaufleitung 16a angeschlossen. Ferner ist im Anschlußblock 2 eine Not-Aus-Magnetventil 17 und ein diesem zugeordnetes Trennventil 13 angeordnet. Zwischen den Nebenleitungen 15a und 16a ist ferner ein System-Druckbegrenzungsventil 39 vorgesehen. Zum Einstellen eines vorbestimmten HilfsSteuerdrucks inLoad pressure taps 21, 22 are provided in the consumer lines 9, 10; 11, 12, from which a control circuit 23', 23", 23 is supplied with a control pressure corresponding to the higher load pressure. The control connection 20 of the control pump 19 is connected to the control circuit 23, 23', 23" via a line 25, whereby shuttle valves 24 integrated in the control circuit 23, 23', 23" feed the higher load pressure into the part 23 of the control circuit 23, 23', 23". In the connection block 2, the control pump 19 is connected to a secondary pump line 15a and the return line 41 is connected to a secondary return line 16a. Furthermore, an emergency stop solenoid valve 17 and an isolating valve 13 associated with it are arranged in the connection block 2. A system pressure relief valve 39 is also provided between the secondary lines 15a and 16a. To set a predetermined auxiliary control pressure in
einer HiIfssteuerleitung 27 kann entweder ein Druckminderventil 40 vorgesehen und an die Nebenleitung 15a angeschlossen sein. Gegebenenfalls ist die Nebenleitung 15a aber nur durch eine Querverbindung 20' mit der HiIfssteuerleitung 27 verbunden.An auxiliary control line 27 can either have a pressure reducing valve 40 provided and connected to the secondary line 15a. If necessary, the secondary line 15a is only connected to the auxiliary control line 27 by a cross connection 20'.
Eine zum Rücklauf 41 führende HiIfsrucklaufleitung 26 ist mit Leckageleitungen 32 beispielsweise vom Not-Aus-Magnetventil 17 und vom Trennventil 18 vom Druckminderventil 20 verbunden.An auxiliary return line 26 leading to the return line 41 is connected to leakage lines 32, for example from the emergency stop solenoid valve 17 and from the isolating valve 18 from the pressure reducing valve 20.
Das Not-Aus-Magnetventil 17 ist ein 3/2-Wegeschaltventil 29 mit einem Betätigungsmagneten 30 und einer diesem entgegenwirkenden Rückstellfeder 31. Das Not-Aus-Magnetventil 17 ist über die Leckageleitung 32 mit der Rücklaufshilfsleitung 26 einerseits und mit der Hilfssteuerleitung 27 andererseits verbunden, die von der Regelpumpe 19 direkt mit Steuerdruck versorgt ist. Eine Ausgangs-Vorsteuerleitung 33 führt vom Not-Aus-Magnetventil 17 zur Steuereingangsseite des ^ennventils 18, das als 4/2-Wegeschaltventil 34 ausgebildet ist, eine Handbetätigung 35 aufweist und durch eine Rückstellfeder 36 entgegen dem VorSteuerdruck in der Vorsteuerleitung 33 belastet ist.The emergency stop solenoid valve 17 is a 3/2-way switching valve 29 with an actuating magnet 30 and a return spring 31 that counteracts it. The emergency stop solenoid valve 17 is connected via the leakage line 32 to the auxiliary return line 26 on the one hand and to the auxiliary control line 27 on the other hand, which is supplied directly with control pressure from the control pump 19. An output pilot line 33 leads from the emergency stop solenoid valve 17 to the control input side of the reducing valve 18, which is designed as a 4/2-way switching valve 34, has a manual actuation 35 and is loaded by a return spring 36 against the pilot pressure in the pilot line 33.
Das Not-Aus-Magnetventil 17 nimmt im nichtbestromten Zustand die in Fig. 1 dargestellte Schaltstellung ein, in der die VorSteuerleitung 33 mit der HiIfsrucklaufleitung 26 verbunden und demzufolge das Trennventil 18 durch die Rückstellfeder 36 in der gezeigten Schaltstellung gehalten ist. In dieser Schaltstellung trennt das Trennventil 18 die Regelpumpe 19 von der Pumpenleitung 15. Die Leitung 25 ist an die Rücklaufhilfsleitung 26 angeschlossen und entlastet. Der Steuerkreis 23 , 23', 23" ist vom Regelanschluß 20The emergency stop solenoid valve 17 assumes the switching position shown in Fig. 1 in the non-energized state, in which the pilot control line 33 is connected to the auxiliary return line 26 and the isolating valve 18 is therefore held in the switching position shown by the return spring 36. In this switching position, the isolating valve 18 separates the control pump 19 from the pump line 15. The line 25 is connected to the auxiliary return line 26 and relieved. The control circuit 23, 23', 23" is separated from the control connection 20.
getrennt.separated.
Wird das Not-Aus-Magnetventil 17 bestromt, so wie es bei normalem Betrieb der Steuervorrichtung 1 der Fall ist, dann geht es in seine zweite Schaltstellung, in der die HiIfssteuerleitung 27 mit der Vorsteuerleitung 33 zum Trennventil 18 verbunden ist. Der aufkommende Steuerdruck verstellt das Trennventil 18 in seine zweite SchaItstellung, in der die Regelpumpe 19 mit der Pumpenleitung 15 und der Regelanschluß 20 über die Leitung 25 mit dem Steuerkreis 23, 23', 23" verbunden ist.If the emergency stop solenoid valve 17 is energized, as is the case during normal operation of the control device 1, then it goes into its second switching position, in which the auxiliary control line 27 is connected to the pilot control line 33 to the isolating valve 18. The resulting control pressure moves the isolating valve 18 into its second switching position, in which the control pump 19 is connected to the pump line 15 and the control connection 20 is connected via the line 25 to the control circuit 23, 23', 23".
Bei einer Not-Aus-Betätigung kehrt das Not-Aus-Magnetventil 17 in die in Fig. 1 gezeigte Schaltstellung zurück, so daß die Vorsteuerleitung 33 zur Hilfsrücklaufleitung 26 entlastet und das Trennventil 18 durch die Rückstellfeder 36 in die dargestellte Schaltstellung verstellt wird, in der die Regelpumpe 19 wieder vom Steuerkreis 23 und von der Pumpenleitung 15 getrennt isr. Nach einer Not-Aus-Betätigung kann das von der Regelpumpe 19 geförderte Druckmittel selbst bei noch offenen Zulaufreglern 37 und noch verstellten Wegesteuerventilen 5, 6 nicht zu den Hydroverorauchern 7, 8 gelangen.In the event of an emergency stop, the emergency stop solenoid valve 17 returns to the switching position shown in Fig. 1, so that the pilot line 33 to the auxiliary return line 26 is relieved and the isolating valve 18 is adjusted by the return spring 36 to the switching position shown, in which the control pump 19 is again separated from the control circuit 23 and from the pump line 15. After an emergency stop, the pressure medium delivered by the control pump 19 cannot reach the hydraulic actuators 7, 8 even if the inlet regulators 37 are still open and the directional control valves 5, 6 are still adjusted.
Das Not-Aus-Magnetventil 17 kann mit dem Trennventil zu einer einfachen Baueinheit zusammengefaßt und in den Anschlußblock 2 eingesetzt sein. Es ist auch denkbar, das Not-Aus-Magnetventil 17 mit dem Trennventil 18 direkt an die Regelpumpe 19 anzubauen.The emergency stop solenoid valve 17 can be combined with the isolating valve to form a simple unit and inserted into the connection block 2. It is also conceivable to install the emergency stop solenoid valve 17 with the isolating valve 18 directly onto the control pump 19.
Claims (8)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9210647U DE9210647U1 (en) | 1992-08-10 | 1992-08-10 | Hydraulic control device |
DE4324177A DE4324177B4 (en) | 1992-08-10 | 1993-07-19 | Hydraulic control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9210647U DE9210647U1 (en) | 1992-08-10 | 1992-08-10 | Hydraulic control device |
Publications (1)
Publication Number | Publication Date |
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DE9210647U1 true DE9210647U1 (en) | 1993-12-16 |
Family
ID=6882492
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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DE9210647U Expired - Lifetime DE9210647U1 (en) | 1992-08-10 | 1992-08-10 | Hydraulic control device |
DE4324177A Expired - Fee Related DE4324177B4 (en) | 1992-08-10 | 1993-07-19 | Hydraulic control device |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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DE4324177A Expired - Fee Related DE4324177B4 (en) | 1992-08-10 | 1993-07-19 | Hydraulic control device |
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DE (2) | DE9210647U1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106477458A (en) * | 2015-08-25 | 2017-03-08 | 徐工欧洲研究中心有限公司 | Hydraulic operation for crane lifts the hydraulic control device of suspension hook |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1281708B1 (en) * | 1996-01-24 | 1998-02-26 | Brevini Hydraulics Spa | DEVICE FOR ACTIVATING A HYDRAULIC USE WITH AN ACTUATING SPEED INDEPENDENT OF THE RESISTANT LOAD BEARING ON IT |
DE19714141A1 (en) * | 1997-04-05 | 1998-10-08 | Mannesmann Rexroth Ag | Hydraulic control arrangement |
DK1069317T3 (en) | 1999-07-10 | 2003-12-08 | Bosch Rexroth Ag | Directional control valve plate, especially for a mobile work machine |
DE10342789B4 (en) * | 2003-09-15 | 2012-05-24 | Linde Material Handling Gmbh | Hydrostatic drive system with a safety device |
DE102004028437B3 (en) | 2004-06-14 | 2006-03-02 | Sauer-Danfoss Aps | valve assembly |
DE202005001417U1 (en) | 2005-01-28 | 2006-06-08 | Hawe Hydraulik Gmbh & Co. Kg | Hydraulic control device |
DE102005005927A1 (en) * | 2005-02-09 | 2006-08-17 | Bosch Rexroth Aktiengesellschaft | Hydraulic control arrangement |
DE102022207790A1 (en) | 2022-07-28 | 2024-02-08 | Hawe Hydraulik Se | Hydraulic valve assembly |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2649793C2 (en) * | 1976-10-29 | 1983-09-08 | Hartmann & Lämmle GmbH & Co KG, 7255 Rutesheim | Safety control for a hydraulically operated press |
DE3710699C1 (en) * | 1987-03-31 | 1988-08-18 | Heilmeier & Weinlein | Hydraulic control device for a consumer group |
-
1992
- 1992-08-10 DE DE9210647U patent/DE9210647U1/en not_active Expired - Lifetime
-
1993
- 1993-07-19 DE DE4324177A patent/DE4324177B4/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106477458A (en) * | 2015-08-25 | 2017-03-08 | 徐工欧洲研究中心有限公司 | Hydraulic operation for crane lifts the hydraulic control device of suspension hook |
CN106477458B (en) * | 2015-08-25 | 2019-02-12 | 徐工欧洲研究中心有限公司 | The hydraulic control device of hydraulic operation lifting suspension hook for crane |
Also Published As
Publication number | Publication date |
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DE4324177A1 (en) | 1994-02-17 |
DE4324177B4 (en) | 2004-02-19 |
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