EP2261512A2 - Dispositif de commande hydraulique - Google Patents

Dispositif de commande hydraulique Download PDF

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Publication number
EP2261512A2
EP2261512A2 EP10005628A EP10005628A EP2261512A2 EP 2261512 A2 EP2261512 A2 EP 2261512A2 EP 10005628 A EP10005628 A EP 10005628A EP 10005628 A EP10005628 A EP 10005628A EP 2261512 A2 EP2261512 A2 EP 2261512A2
Authority
EP
European Patent Office
Prior art keywords
valve
control device
control
load
tools
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.)
Withdrawn
Application number
EP10005628A
Other languages
German (de)
English (en)
Other versions
EP2261512A3 (fr
Inventor
Wolfgang Bertleff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lukas Hydraulik GmbH
Original Assignee
Lukas Hydraulik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lukas Hydraulik GmbH filed Critical Lukas Hydraulik GmbH
Publication of EP2261512A2 publication Critical patent/EP2261512A2/fr
Publication of EP2261512A3 publication Critical patent/EP2261512A3/fr
Withdrawn legal-status Critical Current

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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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—Systems with load-holding 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
    • 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
    • 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
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/30515—Load holding 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40523—Flow control characterised by the type of flow control means or valve with flow dividers
    • F15B2211/4053—Flow control characterised by the type of flow control means or valve with flow dividers using 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
    • 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
    • F15B2211/50527—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 using cross-pressure relief 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
    • 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
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel

Definitions

  • the present invention relates to a control device according to the preamble of claim 1.
  • a corresponding control device is already out of the EP 1 650 442 B1 known.
  • the control valve is designed as a proportional valve.
  • the control valve also has a basic position, in which the control valve moves automatically, if the control element of the control valve is released by the operator. In this basic position, check valves are connected to the service lines. The check valves are in this case necessary part of the valve body of the control valve. This results in the disadvantage that on the one hand has to be moved from a certain valve position to the basic position to ensure the load-holding function, on the other hand, the construction of the control valve is expensive.
  • the object of the present invention is to provide a novel control device of the generic type which avoids the above disadvantages.
  • control valve expediently has only flow divider function. Therefore, conventional proportional valves can be used as control valves.
  • the load-lock valve is hydraulically unlocked, a controlled relief of the tools can be made and a solution of the connectors of the service lines are made possible with complete relief.
  • a mechanical unlocking of the load-holding check valve may also be provided.
  • control valve need not have any means for changing the position of the control valve for an emergency situation.
  • the operating medium lines or a common extension line and / or the return lines or a common entry line can each be assigned a pressure relief valve. This means that the maximum pressure for extending the cylinder is adjustable differently than the maximum pressure for Retraction of the cylinders, but the respective maximum pressure is the same for both cylinders.
  • the pressure relief valve ensures that when a maximum pressure is exceeded, an additional pressure build-up within the hydraulic system is no longer possible. As a result, the entire system can be protected from overpressure.
  • a pressure relief valve for return protection can also be provided, in the event that would form an excessive pressure in this area.
  • Reference numeral 1 denotes the control device according to the invention, whose components are arranged within the dot-dashed area. This control device is preferably portable and can therefore be used directly on site depending on the circumstances of the use.
  • the control device 1 is provided with a pump 4 and with several, in the case of the drawing figure with two means of resources z. B. hydraulic oil powered tools connected.
  • the tools in the present embodiment are a first lifting cylinder 2 and a second lifting cylinder 3, which are operated simultaneously by the single pump 4.
  • the two lifting cylinders 2, 3 work in the same direction, ie in the same direction.
  • the pump 4 is a motor-driven pump or to a hand pump.
  • the operating pressure is for example between about 350 bar and 700 bar.
  • the control device 1 serves to allow the operator to coordinate the operation of the two tools as needed using a single pump 4.
  • control device 1 comprises a change-over valve 5, with which switch positions can be realized in the example of the drawing FIG. 3, namely crossover (retraction of the tools to the initial position), basic position (no operation of the tools) and parallel position (operation of the tools).
  • the inlet from the pump 4 to the switching valve 5 is provided with reference numeral 19.
  • the conveyed by the pump 4 resources is returned directly to the return line to the reservoir 18.
  • the switching valve 5 is designed such that when the operating element 6 is released by the operator due to a spring arrangement 14, it automatically transitions into the basic position shown centrally in the figure, in which only an unpressurized circulation of the operating medium takes place. Lets the operator thus the control element 6 of the switching valve 5 going on, carried by the provision of the switching valve 5 in the normal position no promotion of the equipment from the switching valve 5 to the tools.
  • the control unit 1 further comprises a control valve 7 which is provided between the switching valve 5 and the tools.
  • the Pressure medium line between the switching valve 5 and the individual tools thus runs via the control valve. 7
  • the control valve 7 is designed as a so-called proportional valve, with the result that the operator over the control element 8 with one hand to divide the volume to be split via the control valve 7 of the pump 4 and the switching valve 5 to the individual tools and thus the individual tools can individually control.
  • the operator can operate the control valve 7 in the manner of a joystick control with one hand, wherein it determines the function of the switching valve 5 with the other hand.
  • a feeding operating line 10, 11 is provided between the control valve 7 and the respective tool.
  • a feeding operating line 10, 11 is provided in each resource line 10, 11 each have a load-holding valve 20, 21 is provided.
  • the control device 1 has an independent of the flow divider function of the control valve 7 load-holding function.
  • the arrangement shown in the drawing figure consisting of a first lifting cylinder 2 and a second lifting cylinder 3 operated by the control device 1 by a single operator and falls this operator, for example, by fainting out, the controls are 6 and 8 released, whereupon the switching valve. 5 goes to his basic position.
  • the control valve 7 remains in the current position, while the load-lock valves 20, 21 come into effect and the lifting cylinders 2, 3 remain in the current position.
  • the load-holding check valves 20, 21 no operating medium can flow away to the control valve 7 and to the change-over valve 5 and a load-holding state is established on the tools. There is thus no change in the respective instantaneous position of the first lifting cylinder 2 or the second Lifting cylinder 3.
  • the control valve 7 remains in the current position, the operator can immediately operate the control valve 7 starting from the last position when starting work.
  • the basic position of the switching valve 5 causes the pump 4 resources are conveyed in a non-pressurized circulation.
  • the control valve 7 has only flow divider function, so that conventional proportional valves can be used as control valves, without having to integrate any check valves or other means for recovery in a predetermined basic position.
  • the load-retaining valves 20, 21 are hydraulically unlocked, whereby a controlled relief of the tools can be made and a solution of the connectors of the resource lines 10, 11 is made possible with complete relief.
  • control line 22 is provided, which connects the load-holding valves 20, 21 with each other, wherein the control line 22 is in communication with the respective return line 12, 13.
  • the operating medium lines 10, 11 or the corresponding common extension line and the return lines 12, 13 or the corresponding common entry line is in each case assigned a pressure relief valve 16, 17, so that maximum pressures for the tools or the lifting cylinders 2, 3 each independently In and out can be adjusted. This protects the entire system from overpressure.
  • the maximum input or Ausfahrbuch is in the lifting cylinders 2, 3 due their connection to a common line, in which the respective pressure relief valve 16, 17 is arranged, the same.
  • the pressure relief valves 16, 17 are each spring-loaded in the embodiment, which is indicated by the spring assembly 15.
  • a return valve 9 is provided in the return to the reservoir 18 of the pump 4. This serves as additional security to avoid inadmissible pressure increases in the event that the return line to the reservoir 18 is blocked. From the return valve 9, the equipment can be sprayed into the open air.
  • a conventional changeover valve can be used, which can be used without design changes.
  • the control valve 7 and / or switching valve 5 can be driven manually or by motor.
  • a pump 4 a pump with a plurality of mutually independent resource circuits, such as a so-called dual-flow pump, are used. In the latter case, two lifting cylinders and a rescue scissors could be operated in parallel with the control unit according to the invention.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
EP10005628.2A 2009-06-09 2010-05-31 Dispositif de commande hydraulique Withdrawn EP2261512A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910024886 DE102009024886B3 (de) 2009-06-09 2009-06-09 Steuereinrichtung

Publications (2)

Publication Number Publication Date
EP2261512A2 true EP2261512A2 (fr) 2010-12-15
EP2261512A3 EP2261512A3 (fr) 2014-06-04

Family

ID=42734791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10005628.2A Withdrawn EP2261512A3 (fr) 2009-06-09 2010-05-31 Dispositif de commande hydraulique

Country Status (2)

Country Link
EP (1) EP2261512A3 (fr)
DE (1) DE102009024886B3 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1650442B1 (fr) 2004-10-20 2008-08-06 Lukas Hydraulik GmbH Dispositif de commande

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57154505A (en) * 1981-03-13 1982-09-24 Mitsubishi Heavy Ind Ltd Hydraulic system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1650442B1 (fr) 2004-10-20 2008-08-06 Lukas Hydraulik GmbH Dispositif de commande

Also Published As

Publication number Publication date
EP2261512A3 (fr) 2014-06-04
DE102009024886B3 (de) 2010-12-02

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