EP1801426A2 - Hydraulic or pneumatic circuit configuration - Google Patents

Hydraulic or pneumatic circuit configuration Download PDF

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Publication number
EP1801426A2
EP1801426A2 EP06025774A EP06025774A EP1801426A2 EP 1801426 A2 EP1801426 A2 EP 1801426A2 EP 06025774 A EP06025774 A EP 06025774A EP 06025774 A EP06025774 A EP 06025774A EP 1801426 A2 EP1801426 A2 EP 1801426A2
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EP
European Patent Office
Prior art keywords
valve
connection line
bore
valve sleeve
circuit arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06025774A
Other languages
German (de)
French (fr)
Other versions
EP1801426A3 (en
EP1801426B1 (en
Inventor
Michael Frings
Wolfgang Petri
Mike Heck
René Dr. Schulz
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.)
Thomas Magnete GmbH
Original Assignee
Thomas Magnete GmbH
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Publication date
Priority to DE102005061259 priority Critical
Application filed by Thomas Magnete GmbH filed Critical Thomas Magnete GmbH
Publication of EP1801426A2 publication Critical patent/EP1801426A2/en
Publication of EP1801426A3 publication Critical patent/EP1801426A3/en
Application granted granted Critical
Publication of EP1801426B1 publication Critical patent/EP1801426B1/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors

Abstract

The hydraulic or pneumatic switch arrangement has a pressure connection channel (21) or high pressure connection channel as well as several consumption connection channels (22, 23) with the flow path of the pressure connection channel having a first branching of the two channels, with the first channel led via a switch valve (SV) to a first consumption connection channel (L2), whilst a second channel is led via a return valve (RSV) and/or a pressure limiter valve (DBV) to a second consumption connection channel (L3). There is also a housing block (3) provide to receive at least one switch valve. There may be a second branching between the switch valve and the first consumption connection channel which stands in connection with a third branching via a diaphragm (B) and or a throttle.

Description

  • The invention relates to a hydraulic or pneumatic circuit arrangement according to the preamble of claim 1.
  • Such a circuit arrangement serves, for example, as an actuating system for controlling a hydraulic cylinder in motor vehicle technology, in particular in commercial vehicles. Such a circuit arrangement is known in the art.
  • A principle of such a circuit arrangement according to the prior art is shown in FIG. Such a circuit arrangement can be used for systems in which a hydraulic or pneumatic switching valve is required in conjunction with a check valve and optionally a diaphragm. In the prior art, starting from a high-pressure or pressure connection line L1, the flow path is branched at a branch V1 and separated into two lines L6, L7. The line L7 leads to a switching valve SV, which is preferably actuated electromagnetically, and further via a line L4, a branch V2 to a first load connection line L2. The switching valve SV is used for example in a receiving bore of a housing block. The switching valve SV allows a flow in both possible directions of flow. The line L6 leads to a check valve RSV or a pressure limiting valve DBV and further via a line L5 and a branch V3 to a second load connection line L3. The check valve RSV ensures that only flows from the line L6 in the direction L5 is possible, but not in the reverse direction. In addition, if appropriate, the two separate flow paths between the branches V2 and V3 are connected, via a line L8, a diaphragm B and a line L9. The diaphragm B allows a flow in both directions of flow. The diaphragm may alternatively be designed as a throttle.
  • Systems that are similar to the above-described principle are relatively complex and expensive, both in terms of material costs and manufacturing costs and throughput times at the system manufacturer in the context of system production. The circuit arrangement requires according to example of Figure 6 nine lines, three branches, a diaphragm, a check valve and a switching valve.
  • Based on this prior art, the present invention seeks to provide a circuit arrangement generic type, in which the material costs, manufacturing costs and production times can be reduced while reducing the necessary items. The object is achieved by the characterizing features of claim 1.
  • According to this embodiment, it is possible to realize the circuit arrangement so that only a corresponding plug-in device must be made available, which includes the switching valve, the check valve and / or the pressure relief valve as integral components, wherein the branches and the lines through corresponding housing bores or Holes of the plug-in device are formed. Such a plug-in device can be inserted into a corresponding bore of a housing block, wherein bores or channels for the pressure connection lines and the consumer connection lines are provided in the housing block. The bore in the housing block can be carried out accordingly or else it is also possible to use the hole for the insertion of the insertion device in an existing housing block, which was previously provided for the conventional switching valve.
  • The inventive design, the number of required components is reduced to a minimum, in particular, can be dispensed with separate lines, branches and the like. The separate arrangement of a check valve or pressure relief valve is not required.
  • Preferably, it may be provided that between the switching valve and the first consumer connection line, a second branch is formed, which communicates via a diaphragm and / or throttle with a third branch, which is formed between the check valve and / or pressure relief valve and the second load connection line. According to this embodiment, the diaphragm and / or the throttle including the associated branches is formed as an integral part of the plug-in device, so that the relevant lines, branches and components do not have to be provided and assembled as separate elements.
  • It is particularly preferred that the plug-in device consists of a directional control valve with a valve sleeve inserted into the receiving bore of the housing block and a valve spool inserted into the valve sleeve, wherein the valve sleeve is connected at one end or the housing block with housing parts of an electromagnet, the outside of the receiving bore the housing block is arranged, while the valve spool is operatively connected to the displaceable armature of the electromagnet. Directional valves are known in the art. Their use in pneumatic and hydraulic systems is known. The number of controlled ports and the shift positions is indicated by numbers in the form of 2/2-way valve, 3/2-way valve and the like. The first number indicates the controlled connections, the second number the switch positions. According to the invention is such Directional valve designed as a longitudinal slide, which is flowed through radially and axially and is actuated axially.
  • The actuation of directional valves by electromagnets is also known in the art. According to the invention, an electromagnet is preferred, which is held in the non-energized state by a return spring in the basic position and is energized in the energized magnet against the force of the return spring as a pull magnet. The housing of the electromagnet can be attached to the housing block. It is also possible to rigidly connect the housing with the valve sleeve. In any case, the valve spool disposed within the valve sleeve is displaceable by energizing the electromagnet in one of the two switching positions, wherein the other switching position is effected in de-energized electromagnet, characterized in that the armature is set by a return spring in the starting position.
  • Preferably, it may be provided that the directional control valve is designed as a two-position valve.
  • In addition, it is preferred that the solenoid is designed as a solenoid with train, which is held without current in a first position by the force of a return spring and the energized is adjusted in the second position against the force of the return spring.
  • A preferred development is seen in that the receiving bore of the housing block with axial distance from each other forms three annular chambers, in the first, the pressure connection line, in the second, the first consumer connection line and in the third, the second load connection line opens, and that the annular chambers inserted into the receiving bore Valve sleeve sealed by arranged on the jacket of the valve sleeve seals against each other and are bounded radially by located between the seals shell portions of the valve sleeve, wherein the jacket portions have radial bores, the annular chambers with the interior the valve sleeve connected, in which the valve spool is arranged.
  • It is preferably provided that the seals are designed as mechanical seals to realize the shortest possible arrangement of the directional control valve. Such a type of seal builds shorter than other common seals. It is thus possible under some circumstances to make the installation length such that the directional control valve can be inserted into an installation space of a housing part, which is conventionally occupied by a switching valve.
  • According to the invention, therefore, a valve assembly comprising the directional control valve with the independently operating Druckbegrenzungs- / or check valve installed in a block and connected through holes in this block with the pressure supply and the consumer, wherein the valve assembly is designed as a plug-in device and all functional elements and Contains line elements. The functional elements use common components, but different functional surfaces. The optionally provided aperture allows a flow in both directions of flow.
  • Under certain circumstances, it is preferably provided that the directional control valve is designed as a 2/2 way valve.
  • It may also be preferred that the directional control valve is designed as a 3/2-way valve.
  • For example, as an alternative to the connection between the first consumer connection line and the second consumer connection line through the throttle, it may be provided to provide a variable connection between the first consumer line and the second consumer connection line. As a result, the directional control valve becomes a 3/2-way valve with two active control edges. The throttle can then be omitted.
  • According to a preferred embodiment, it is provided that the check valve or the pressure relief valve is part of the valve spool. This allows a protected arrangement of the check valve after mounting the directional control valve, however, the processing of the valve spool for receiving and forming the pressure relief valve is more complex.
  • An alternative, optionally preferred embodiment is seen in that the check valve or the pressure relief valve is part of the valve sleeve. Here, the check valve or the pressure relief valve is free before installing the directional control valve in the corresponding housing bore, so that it could be damaged. On the other hand, this arrangement is manufacturing technology and assembly technology easier.
  • In addition, it can be provided that the diaphragm or throttle component, in particular a bore, of the valve spool is.
  • Alternatively it can be provided that the diaphragm or throttle component, in particular a bore, the valve sleeve.
  • A possibly preferred development is seen in the fact that the check valve is designed as a ball valve with return spring, with a small diameter bore as a seat and a conical extension to a larger bore whose diameter is at least slightly larger than the ball diameter and in the ball is axially displaceable.
  • An alternative embodiment, which can be realized at a lower cost, is seen in that the check valve is designed as a plate valve with a curved flat spring as a plate, which is arranged on a cylindrical lateral surface of the valve sleeve.
  • In addition, it is preferably provided that the aperture by a variable flow resistance between the space behind the check valve and the connection of the first consumer line is formed, which is preferably realized in that the valve spool more or less opens a passage gap between a spool circulation groove and an inner groove in the valve sleeve in response to the valve.
  • A particularly preferred embodiment is seen in that the radial bores of the jacket areas on the inside of the valve sleeve in each annular recesses or recirculating grooves of the valve sleeve open, that the fluid-tight inserted into an axial bore of the valve sleeve valve slide in its outer shell has a first circumferential grooves or groove of such width in that, when the electromagnet is not energized, a fluid-open annular channel connects the annular chamber of the valve sleeve connected to the pressure connection line to the axially adjacent annular chamber connected to the first consumer connection line and is axially displaced with the electromagnet energized, such that the connection between the annular channel and the one connected to the first consumer connection line Is closed off annular chamber, that in the first recess or groove of the valve spool, a first transverse bore of the valve spool opens, with a stepped, closed end Axialbohr ung the valve spool fluidly connected, in which a spring-loaded ball valve is used as a check valve, wherein the transverse bore opens into the inlet side of the axial bore and the axial bore on the drain side through a second transverse bore into a second circumferential groove of the valve spool opens, with the annular chamber of the valve sleeve in fluid-open connection is, in which the second consumer connection line opens, and that the valve slide has a further, forming the aperture radial bore which connects the flow area of the ball valve receiving axial bore constantly with the annular chamber, which is in communication with the first consumer connection line.
  • An alternative preferred embodiment is seen in that the radial bores of the jacket areas inside the valve sleeve in each annular recesses or recirculating grooves of the valve sleeve open, that the fluid-tight inserted into an axial bore of the valve sleeve valve slide in its outer shell has a first circumferential recess or groove of such width in that, when the electromagnet is not energized, a fluid-open annular channel connects the annular chamber of the valve sleeve connected to the pressure connection line to the axially adjacent annular chamber connected to the first consumer connection line and is axially displaced with the electromagnet energized, such that the connection between the annular channel and the one connected to the first consumer connection line Is closed off annular chamber, that in the first recess or groove of the valve spool, a first transverse bore of the valve spool opens, with an end closed axial bore of the Venti Slider is fluidly connected, wherein the axial bore opens via a second transverse bore in a second circumferential groove of the valve spool, which is in fluid communication with the annular chamber of the valve sleeve into which opens the second consumer connection, the valve sleeve in the region of the radial bore of the jacket region for the second load connection line is covered by the constructed as a check valve curved flat spring, and that axially between the first circumferential groove and second circumferential groove, a third circumferential groove is formed on the valve spool, in which a radial bore of the valve sleeve opens, which forms the diaphragm, wherein the bore radially outwardly of the valve sleeve opens into an annular chamber connected to the second load connection line, which is formed between the valve sleeve and housing bore, and that the third circumferential Groove has such a width that in each position of the valve slide a fluid-open connection between the circumferential groove and connected to the first load port line annular chamber.
  • A further alternative preferred embodiment is seen in that the third annular chamber of the housing block, into which the second consumer connection line opens, is arranged axially between the first annular chamber, into which the pressure connection line opens, and the second annular chamber, into which the first consumer connection line opens, the radial bores of the jacket regions for the pressure connection line and the second consumer connection line open into a first annular recess or circumferential groove of the valve slide and the radial bores for the first consumer connection line open into a second annular recess or circumferential groove on the inner jacket of the valve sleeve, which has such a width in that, when the electromagnet is de-energized, there is a fluid-open connection between the first and the second recess or circumferential groove which is blocked when the electromagnet is energized, in that the valve sleeve is located in the region of the radial bore of the Ma is covered by the designed as a check valve, curved flat spring, and that the valve sleeve has a radial bore in the region of the annular chamber formed between the receiving bore of the housing block and the valve sleeve for the second load port as a diaphragm, which surrounds the annular chamber with the second annular recess or circumferential groove connects. Such a design is particularly inexpensive to manufacture and easy to implement.
  • In addition, it can be provided that the valve sleeve is part of another device, wherein the valve slide together with the electromagnet is inserted into this. In this described design is the device further comprises a plug-in device, wherein the solenoid and the valve slide can be inserted into this other device and the functional elements such as check valve, pressure relief valve, switching valve and throttle can be mounted together with the components belonging to the plug-in device of the directional control valve.
  • Further advantages of the invention will become apparent from the dependent claims and the embodiments, which are illustrated in the drawings and described in more detail below.
    • Fig. 1 shows a schematic diagram of the circuit arrangement according to the invention.
    • Fig. 2 shows an inserted into a housing bore directional valve with solenoid in view, partially cut.
    • 3A to 3C show a first embodiment of a drawer device according to the invention in a side view, partially in section.
    • 4A to 4C show a variant seen in the views of Figure 3.
    • FIGS. 5A to 5C show a further variant as seen in FIG.
  • In Fig. 1, the inventive design of the circuit arrangement is shown schematically as a plug-in device. It can be seen that in this case only three lines, namely the supplying pressure connection line L1, and the laxative first and second load connection lines L2 and L3 are required and a plug-in unit shown as a block 1. This plug-in device includes as integral components a check valve RSV, a diaphragm B and a switching valve SV, these elements are connected via holes, channels or the like within the plug-in device 1 as intended, so that the desired function is achieved.
  • From the design of FIG. 1, not only cost savings due to the smaller number of individual elements, but also a significant reduction in assembly costs. In addition, it is possible to test the finished plug-in unit 1 prior to installation in the housing block, wherein in addition even shorter throughput times are achieved in the production.
  • In the illustration according to FIG. 2, the insertion device 1 is shown inserted into a receiving bore 2 of a housing block 3 . In this case (see FIG. 3 to 5) is the insertion device 1 of a directional control valve with an inserted into the receiving bore 2 of the housing block 3 and a valve sleeve 4 arranged in said valve spool 5. Outside the housing block 3 , an electromagnet 6 is arranged, whose housing is fixedly connected to the valve sleeve 4 or the housing block 3 and whose displaceable armature can act on the valve slide 5 .
  • In the embodiments described below, the same functional or components are provided with the same reference numerals.
  • As can be seen in particular from FIGS. 3 to 5, the directional control valve is designed as a 2-position valve. The electromagnet 6 is designed as a lifting magnet with tension, which is not energized, as shown in Fig. 3A, 3C, 4A, 4C, 5A and 5C, is held by the force of a return spring in a first position and the energized (see Fig. 3B , 4B and 5B) is adjusted in the second position against the force of the return spring of the electromagnet 6 .
  • The staged in the embodiment receiving bore 2 of the housing block 3 has from its outer mouth to the blind hole of the bore with axial distance from each other three annular chambers 7, 8, 9 , in the first ( 7 ) the consumer connection line L1, in the second ( 8 ) the first Consumer connection line L2 and in whose third ( 9 ) the second consumer connection line L3 opens. The annular chambers 7, 8, 9 are sealed when inserted into the receiving bore 2 valve sleeve 4 by arranged on the jacket of the valve sleeve 4 seals 10 to 13 . The chambers 7, 8, 9 are therefore limited by a wall portion of the bore 2, the seals 10 to 13 and between the seals 10, 11, 12, 13 located jacket portions of the valve sleeve 4 . These jacket areas have radial through holes 14, 15 , which connect the annular chambers with the interior of the valve sleeve 4 , in which the valve slide 5 is arranged. Notably, the seals 10 to 13 are formed as mechanical seals, with internal O-ring and outer sliding ring running, as shown for example in Fig. 3A. The directional control valve is preferably designed as a 2/2-way valve, which will be explained with reference to FIGS. 3 to 5.
  • In the embodiment according to FIG. 3, the check valve RSV, which can also be designed as a pressure limiting valve, is part of the valve slide 5. In the embodiments according to FIGS. 4 and 5 , the check valve, which can also act as a pressure limiting valve, is part of the valve sleeve 4.
  • In the embodiment of Fig. 3 , the diaphragm or throttle B is part, in particular a radial bore of the valve slide 5, while in the embodiments according to FIGS. 4 and 5, the diaphragm or throttle B component, in particular a radial bore of the valve sleeve 4 .
  • In the embodiment of Fig. 3, the check valve RSV is designed as a ball valve with return spring 16 , with a small diameter bore 17 as a seat and a conical extension 18 to a larger bore 19, whose diameter is at least slightly larger than the diameter of the ball 20 and in which the ball is axially displaceable (against the force of the springs 16 ) . at In the embodiments according to FIGS. 4 and 5, the check valve RSV is designed as a plate valve with a curved flat spring as a plate, which is arranged on a cylindrical jacket surface of the valve sleeve 4 . The radial bores 14, 15, 21 of the jacket regions of the valve sleeve 4 preferably open into annular grooves or circumferential grooves of the valve sleeve, to which reference is made in particular to FIG. 3. This figure will be further described below.
  • The fluid-tight in an axial bore of the valve sleeve 4 inserted valve slide 5 has in its outer shell a first circumferential recess 22 or groove of such width that is shown in the energized solenoid as shown in Fig. 3A and Fig. 3C, a fluid-open annular channel with the pressure connection line L1 connected via the bore 14 connected annular chamber of the valve sleeve 4 with the axially adjacent, connected to the first load connection line L2 via the bore 15 annular chamber.
  • When energized electromagnet according to FIG. 3B, the valve slide 5 is displaced such that the connection between this annular channel (at 15) and connected to the first load port L1 via 14 annular chamber is shut off. Consequently, when the solenoid is de-energized, the flow from the pressure connection line L1 to the first load connection line L2 is open. When energized electromagnet 6 , this connection is closed.
  • In Figure 3C, a position is shown in which the check valve RSV is open, so the ball 20 is lifted from the corresponding seat (at 18 ). Not only is the flow from the pressure connection line L1 to the first load connection line L2 open in this position, but also the flow to the second load connection line L3.
  • As also shown in Figure 3, opens into the first recess 22 or groove of the valve spool 5, a first transverse bore 23 of the valve slide 5, which is fluidly connected to the stepped, closed end axial bore 17 of the valve spool 5 , in which the spring-loaded ball valve as a check valve RSV is used. The transverse bore 23 opens into the inlet side of the axial bore 17 a. In the region of the larger bore 19 of the axial bore, a second transverse bore 24 opens into a second circumferential groove 25 of the valve slide 5, which is in fluid-open communication with the corresponding annular chamber of the valve sleeve 4 , into which the second consumer connection line L3 opens. In addition, the valve spool 5 has a further, the diaphragm B forming radial bore which connects the flow area of the ball valve receiving axial bore 19 constantly with the annular chamber, which is in communication with the first load connection line L2 .
  • In the embodiment of FIG. 4 open the radial bores 14, 15, 21 of the jacket portions of the valve sleeve 4 inside the valve sleeve 4 in each annular grooves or recirculating grooves of the valve sleeve 4. The fluid-tight in an axial bore of the valve sleeve 4 inserted valve slide 5 has in his Outer jacket a first circumferential recess 26 or circumferential groove of such width that, when energized solenoid according to Fig. 4A and Fig. 4C, a fluid-open annular channel connects the connected to the pressure line L1 annular chamber of the valve sleeve 4 with the axially adjacent, connected to the first load connection line L2 annular chamber and, when the electromagnet is energized, according to FIG. 4B, is displaced axially in such a way that the connection between the annular channel and the annular chamber connected to the first consumer connecting line L2 is shut off.
  • In the first recess 26 or groove of the valve slide 5 opens a first transverse bore 27 of the valve slide 5, which is fluidly connected to an end closed axial bore 28 of the valve slide 5 , wherein the axial bore 28 via a second transverse bore 29 in a second circumferential groove of the valve slide. 5 opens, which is provided in the region of the bore 21 , in which the second consumer connection line L3 opens. The valve sleeve 4 is covered in the region of the radial bore 21 of the jacket region for the second consumer connection line L3 by the flat spring designed as a check valve RSV and bent. Axially between the first circumferential groove or recess 26 and the second circumferential groove in the region of the transverse bore 29 is a third circumferential groove 30 formed on the valve spool 5 , in which a radial bore 31 of the valve sleeve 4 opens, which forms the diaphragm B , wherein the bore 31 radially outwardly of the valve sleeve 4 opens into a connected to the second load connection line L3 annular chamber which is formed between the valve sleeve 4 and the corresponding housing bore L3 . The third circumferential groove 30 has a width such that in each position of the valve slide 5 there is a fluid-open connection between the circumferential groove and the annular chamber connected to the first consumer connection line L2 .
  • In the position shown in FIG. 4A, the electromagnet 6 are de-energized and opened the connection from L1 to L2 . In Fig. 4B, the electromagnet 6 is energized and thus the connection from L1 to L2 closed. In the position shown in FIG. 4C, the solenoid 6 are de-energized and additionally the check valve RSV open.
  • In the embodiment of FIG. 5, which corresponds to the embodiment of FIG. 2, the third annular chamber of the housing block 3, in which the second load connection line L3 opens, axially between the first annular chamber into which the pressure connection line L1 opens and the second annular chamber, in which the first load connection line L2 opens, arranged. The radial holes 14 and 21 for the pressure connection line L1 and the second load connection line L3 open into a first annular recess 31 or circulation groove of the valve slide 5. The radial holes 15 for the first load connection line L2 open into an annular recess 33 or circumferential groove on the inner surface of the valve sleeve. 4 , Wherein this has such a width that, when the electromagnet 6 is de-energized according to FIG. 5A and FIG. 5C, there is a fluid-open connection between the recess 32 and the recess 33 or circumferential groove, but this is blocked when the electromagnet according to FIG. 5B is energized.
  • The valve sleeve 4 is covered in the region of the radial bore 21 of the jacket region for the second load connection line L3 by the curved flat spring designed as a check valve RV . Further, the valve sleeve 4 in the region between the receiving bore 2 of the housing block 3 and the valve sleeve 4 formed for the second consumer port L3 annular chamber as a diaphragm B a radial bore 34 which connects the annular chamber 8 with the annular recess 33 or Umlaufnut.
  • Also in the embodiment according to FIG. 5, analogously to FIG. 3 and FIG. 4, in the representation according to FIG. 5A the electromagnet 6 is de-energized and the connection from L1 to L2 is opened. In Fig. 5B, the electromagnet 6 is energized, so that the connection from L1 to L2 is closed.
  • In the illustration according to FIG. 5C, the magnet is de-energized and the check valve RSV is opened.
  • In the embodiments of the check valve as a flat spring, this flat spring is bent annular and comprises about 80% of Circumference of the valve sleeve 4. It is fastened with a rivet so that it is not slidable or rotatable on the valve sleeve 4 .
  • The invention is not limited to the embodiments, but in the context of the disclosure often variable. All new, disclosed in the description and / or drawing single and combination features are considered essential to the invention.

Claims (20)

  1. Hydraulic or pneumatic circuit arrangement with a pressure connection line ( 21 ) or high-pressure connection line and a plurality of consumer connection lines ( 22, 23 ), wherein the flow path of the pressure connection line ( 21 ) is divided by a first branch on two lines whose first line via a switching valve ( SV ) to a first consumer connection line ( L2 ) is guided and whose second line is guided via a check valve ( RSV ) and / or a pressure limiting valve ( DBV ) to a second load connection line ( L3 ), wherein a housing block ( 3 ) for receiving at least the switching valve ( SV ) provided is
    characterized in that all lines and functional parts are integral components of a plug-in device ( 1 ) which is inserted or inserted into a receiving bore ( 2 ) of the housing block ( 3 ) or in the receiving bore ( 2 ) of the switching valve instead of the switching valve, wherein the plug-in device ( 1 ) can be connected or connected to the pressure connection line ( L1 ) and the consumer connection lines ( L2, L3 ) via bores or channels formed in the housing block ( 3 ).
  2. Circuit arrangement according to claim 1, characterized in that between the switching valve ( SV ) and the first load connection line ( L2 ), a second branch is formed, which communicates via an orifice ( B ) and / or throttle with a third branch, which is connected between the check valve ( RSV ) and / or pressure relief valve ( DBV ) and the second load connection line ( L3 ) is formed.
  3. Circuit arrangement according to one of claims 1 or 2, characterized in that the plug-in device ( 1 ) consists of a directional valve with a receiving bore ( 2 ) of the housing block ( 3 ) insertable valve sleeve ( 4 ) and in the valve sleeve ( 4 ) inserted valve spool ( 5 ), wherein the valve sleeve ( 4 ) at one end or the housing block with housing parts of an electromagnet ( 6 ) is connected, which is outside the receiving bore ( 2 ) of the housing block ( 3 ), while the valve spool ( 5 ) with the slidable armature of the electromagnet (6) is operatively connected.
  4. Circuit arrangement according to claim 3, characterized in that the directional control valve is designed as a two-position valve.
  5. Circuit arrangement according to claim 3 or 4, characterized in that the electromagnet ( 6 ) is designed as a solenoid with train, which is held de-energized in a first position by the force of a return spring and the energized is adjusted in the second position against the force of the return spring ,
  6. Circuit arrangement according to one or more of claims 3 to 5, characterized in that the receiving bore ( 2 ) of the housing block ( 3 ) at an axial distance from each other three annular chambers ( 7, 8, 9 ), in whose first the pressure connection line ( L1 ), in the second of which the first consumer connection line ( L2 ) and in the third, the second load connection line ( L3 ) opens, and that the annular chambers ( 7, 8, 9 ) in the receiving bore ( 2 ) inserted valve sleeve ( 4 ) by on the jacket of the valve sleeve ( 4 ) arranged seals ( 10 to 13 ) sealed against each other and radially by between the seals ( 10 to 13 ) located jacket portions of the valve sleeve ( 4 ) are limited, wherein the jacket portions radial Holes ( 14, 15, 21 ) which connect the annular chambers ( 7, 8, 9 ) with the interior of the valve sleeve (4 ) , in which the valve slide ( 5 ) is arranged.
  7. Circuit arrangement according to claim 6, characterized in that the seals ( 10 to 13 ) are designed as mechanical seals.
  8. Circuit arrangement according to one or more of claims 3 to 7, characterized in that the directional control valve is designed as a 2/2 way valve.
  9. Circuit arrangement according to one or more of claims 3 to 7, characterized in that the directional control valve is designed as a 3/2 way valve.
  10. Circuit arrangement according to one of claims 3 to 9, characterized in that the check valve ( RSV ) or the pressure limiting valve ( DBV ) is part of the valve slide ( 5 ).
  11. Circuit arrangement according to one of claims 3 to 9, characterized in that the check valve ( RSV ) or the pressure relief valve ( DBV ) is part of the valve sleeve ( 4 ).
  12. Circuit arrangement according to one of claims 3 to 11, characterized in that the diaphragm ( B ) or throttle component, in particular a bore, of the valve slide ( 5 ).
  13. Circuit arrangement according to one of claims 3 to 11, characterized in that the diaphragm ( B ) or throttle component, in particular a bore, the valve sleeve ( 4 ).
  14. Circuit arrangement according to claim 10, characterized in that the check valve ( RSV ) is designed as a ball valve with return spring ( 16 ), with a small diameter bore ( 17 ) as a seat and a conical extension ( 18 ) to a larger bore (19), whose diameter is at least slightly larger than the ball diameter and in which the ball ( 20 ) is axially displaceable.
  15. Circuit arrangement according to claim 11, characterized in that the check valve ( RSV ) is designed as a plate valve with a curved flat spring as a plate, which is arranged on a cylindrical lateral surface of the valve sleeve ( 4 ).
  16. Circuit arrangement according to one or more of claims 3 to 15, characterized in that the diaphragm ( B ) is formed by a variable flow resistance between the space behind the check valve ( RSV ) and the connection of the first load line ( L2 ), which is preferably realized thereby in that the valve slide ( 5 ) more or less opens a passage gap between a slide circulation groove and an inner groove in the valve sleeve ( 4 ) as a function of the valve lift.
  17. Circuit arrangement according to one of claims 6 to 10, 12, 14 or 16, characterized in that the radial bores (14, 15, 21) of the skirt areas on the inside of the valve sleeve (4) open out into respective annular turned recesses or circumferential grooves of the valve sleeve (4), that the fluid-tight in an axial bore of the valve sleeve ( 4 ) inserted valve spool ( 5 ) has in its outer jacket a first circumferential turns ( 22 ) or groove of such width that when energized solenoid ( 6 ) a fluid-open annular channel connected to the pressure connection line (L1) annular chamber of the valve sleeve ( 4 ) with the axially adjacent, connected to the first consumer connection line ( L2 ) connected annular chamber and is axially displaced with energized electromagnet ( 6 ) that the connection between the annular channel and the first consumer connection line (L1) connected annular chamber is closed, that in the first recess ( 22 ) or groove of the slide valve (5) opens a first transverse bore (23) of the valve slide (5) fluidly open with a stepped closed-end axial bore of the valve slide (5) is connected, into which a spring-loaded ball valve as the non-return valve (RSV) is inserted, wherein the transverse bore ( 23 ) in the inlet side of Axialb opens and the axial bore on the outlet side through a second transverse bore ( 24 ) in a second circumferential groove ( 25 ) of the valve spool ( 5 ) opens, which is in fluid communication with the annular chamber of the valve sleeve ( 4 ), in which the second load connection line ( L2 ) opens and that the valve spool ( 5 ) has a further, the diaphragm ( B ) forming radial bore which connects the discharge area of the ball valve receiving axial bore constantly with the annular chamber, which is in communication with the first load connection line ( L2 ) (Fig. 3).
  18. Circuit arrangement according to one of claims 6 to 9, 11, 13, 15 or 16, characterized in that the radial bores ( 14, 15, 21 ) of the jacket areas on the inside of the valve sleeve ( 4 ) in each annular grooves or recirculating grooves of the valve sleeve ( 4 ). open, that the fluid-tight in an axial bore of the valve sleeve ( 4 ) inserted valve slide ( 5 ) in its outer jacket a first circumferential recess ( 26 ) or groove of such width, that in energized solenoid ( 6 ), a fluid-open annular channel connected to the pressure connection line (L1) annular chamber of the valve sleeve ( 4 ) with the axially adjacent, with the first load connection line ( L2 ) connected annular chamber connects and in the case of a supplied electromagnet ( 6 ) is axially displaced such that the connection between the annular channel and the annular chamber connected to the first consumer connection line ( L2 ) is blocked, that in the first recess ( 26 ) or groove of the valve slide ( 5 ) has a first transverse bore ( 27 ) of the valve slide ( 5 ) opens, which is fluidly connected to an end closed axial bore ( 28 ) of the valve slide ( 5 ), wherein the axial bore ( 28 ) via a second transverse bore ( 29 ) in a second circumferential groove of the valve slide ( 5 ), which is in fluid communication with the annular chamber of the valve sleeve ( 4 ), in the the second consumer connection line ( L3 ) opens, the valve sleeve ( 4 ) in the region of the radial bore of the jacket region for the second load connection line ( L3 ) is covered by the designed as a check valve ( RSV ) curved flat spring and that axially between the first circumferential groove and the second circumferential A third circumferential groove ( 30 ) on the valve slide ( 5 ) is formed, in which a radial bore ( 31 ) of the valve sleeve ( 4 ) opens, which forms the diaphragm ( B ), wherein the bore ( 31 ) radially outwardly of the valve sleeve ( 4 ) opens into an annular chamber connected to the second consumer connection line ( L3 ), which is formed between the valve sleeve ( 4 ) and housing bore ( 2 ), and in that the third circumferential groove ( 30 ) has a width such that in each position of the valve slide ( L3 ) 5 ) a fluid-open connection between the circumferential groove and with the first consumer connection line ( L2 ) connected annular comb it consists (Fig. 4).
  19. Circuit arrangement according to one of claims 6 to 9, 11, 13, 15 or 16, characterized in that the third annular chamber of the housing block ( 3 ), in which the second consumer connection line ( L3 ) opens, axially between the first annular chamber into which the pressure connection line ( L1 ) opens, and the second annular chamber into which the first consumer connection line ( L2 ) opens, is arranged such that the radial bores of the jacket regions for the pressure connection line ( L1 ) and the second load connection line ( L3 ) in an annular recess ( 32 ) or Circulation groove of the valve spool ( 5 ) open and the radial bores for the first load connection line ( L2 ) in an annular recess ( 33 ) or recirculation groove on the inner shell of the valve sleeve ( 4 ) opens, which has such a width that when energized electromagnet ( 6 ) there is a fluid-open connection between the recess ( 32 ) and the recess ( 33 ) or circumferential groove, d ie when the electromagnet ( 6 ) is energized, it is blocked that the valve sleeve ( 4 ) in the region of the radial bore of the jacket region for the second consumer connection line ( L3 ) is covered by the curved flat spring designed as a check valve ( RSV ) and in that the valve sleeve ( 4 ) in the region of the annular chamber formed between the receiving bore ( 2 ) of the housing block ( 3 ) and the valve sleeve ( 4 ) for the second consumer port ( L3 ) as a diaphragm ( B ) has a radial bore ( 34 ), the annular chamber with the annular recess ( 33 ) or circumferential groove connects (Fig. 5).
  20. Circuit arrangement according to one of claims 3 to 19, characterized in that the valve sleeve ( 4 ) is part of a further device, wherein the valve slide ( 5 ) together with the electromagnet ( 6 ) can be inserted into this.
EP20060025774 2005-12-20 2006-12-13 Hydraulic or pneumatic circuit configuration Expired - Fee Related EP1801426B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102005061259 2005-12-20

Publications (3)

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EP1801426A2 true EP1801426A2 (en) 2007-06-27
EP1801426A3 EP1801426A3 (en) 2009-11-04
EP1801426B1 EP1801426B1 (en) 2011-11-02

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Application Number Title Priority Date Filing Date
EP20060025774 Expired - Fee Related EP1801426B1 (en) 2005-12-20 2006-12-13 Hydraulic or pneumatic circuit configuration

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EP (1) EP1801426B1 (en)
AT (1) AT531946T (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014015559A1 (en) * 2014-10-21 2016-04-21 Thomas Magnete Gmbh Proportional-acting electrohydraulic pressure control valve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881512A (en) 1973-09-21 1975-05-06 Koehring Co Hydraulic control valve and pressure compensating mechanism therefor
JPH09210006A (en) 1996-02-01 1997-08-12 Sumitomo Constr Mach Co Ltd Regenerative circuit for construction machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5836335A (en) * 1991-08-19 1998-11-17 Fluid Power Industries, Inc. Proportional pressure control valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881512A (en) 1973-09-21 1975-05-06 Koehring Co Hydraulic control valve and pressure compensating mechanism therefor
JPH09210006A (en) 1996-02-01 1997-08-12 Sumitomo Constr Mach Co Ltd Regenerative circuit for construction machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014015559A1 (en) * 2014-10-21 2016-04-21 Thomas Magnete Gmbh Proportional-acting electrohydraulic pressure control valve

Also Published As

Publication number Publication date
EP1801426B1 (en) 2011-11-02
AT531946T (en) 2011-11-15
EP1801426A3 (en) 2009-11-04

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