EP0854982B1 - Valve system - Google Patents

Valve system Download PDF

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Publication number
EP0854982B1
EP0854982B1 EP96945481A EP96945481A EP0854982B1 EP 0854982 B1 EP0854982 B1 EP 0854982B1 EP 96945481 A EP96945481 A EP 96945481A EP 96945481 A EP96945481 A EP 96945481A EP 0854982 B1 EP0854982 B1 EP 0854982B1
Authority
EP
European Patent Office
Prior art keywords
valve
conduit
block
control
block according
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
Application number
EP96945481A
Other languages
German (de)
French (fr)
Other versions
EP0854982A2 (en
Inventor
Hans Schwelm
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.)
Claas Industrietechnik GmbH
Original Assignee
Individual
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Filing date
Publication date
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Publication of EP0854982A2 publication Critical patent/EP0854982A2/en
Application granted granted Critical
Publication of EP0854982B1 publication Critical patent/EP0854982B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F15B11/006—Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0405—Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0807—Manifolds
    • F15B13/0814—Monoblock manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0832—Modular valves
    • F15B13/0835—Cartridge type valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0846—Electrical details
    • F15B13/086—Sensing means, e.g. pressure sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0878—Assembly of modular units
    • F15B13/0885—Assembly of modular units using valves combined with other components
    • F15B13/0889—Valves combined with electrical components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
    • F15B2013/006—Modular components with multiple uses, e.g. kits for either normally-open or normally-closed valves, interchangeable or reprogrammable manifolds
    • 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
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87193—Pilot-actuated
    • Y10T137/87201—Common to plural valve motor chambers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87193—Pilot-actuated
    • Y10T137/87209—Electric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87885—Sectional block structure

Definitions

  • the present invention relates to a central block of a piloted valve and / or piston valve system, which has both a preferably standardized connection interface and a pilot valve interface for receiving a pilot valve, and which has a pump (P), a tank (T), has a first working line (A), a second working line (B), a first control line x and a second control line y, and in which four valve receptacles for accommodating one valve unit each (C 1 , C 2 , C 3 , C 4 ) are arranged are.
  • Valve systems with pilot operated seat and / or piston valves and with such a central block are for example from DE-OS 36 04 410, GB 2,212,220 A or EP 0 473 030 A1.
  • From DE-OS 36 04 410 is a hydraulic control block with a Pilot valve, a four-way valve, which is pilot-controlled by the pilot valve a pressure reducer, a check valve and a throttle check valve known.
  • Each of the aforementioned elements is in one independent housing block made of cast iron and only with appropriate Hydraulic lines connected to the other housing blocks.
  • valve units used in the corresponding provided in the central block Valve mounts can be used. These valves are then with an in Central block screwed lid fixed. At these valves can now Depending on the area of application, other components, such as a check valve, an electromagnetic proportional control or the like, and / or additional valves can be attached. Such valve units are called so-called cartridge (cartridge technology) called.
  • the bottom of the control block (DE 36 04 410), or the bottom of the Central block (EP 0 473 030) is designed as a connection interface and has a drilling pattern standardized according to DIN 24340, so that the control block or the Central block to almost every new and existing hydraulic system can be connected.
  • valves housed in the central block can be of various types be connected to each other.
  • the valves according to the laws logic through “and", "or” or “not and” links with each other connected.
  • connection of the valves is required for each application, so that for each application a separate central block with for each hydraulic circuit specific hydraulic connections are cast must, which has high manufacturing costs.
  • valve systems for example in plastic injection molding machines or with industrial robots it can happen that after some Another application is used at times, so that a modified one hydraulic circuit in the plastic injection machine or in the industrial robot must be used. In this case, the entire central block be replaced and replaced with a new one, so very much high material and assembly costs arise.
  • the present invention is based on the object a central block of a pilot operated seat and / or piston valve valve system to create, the universal for any number hydraulic circuits can be used and its hydraulic Circuit can be changed in a simple manner.
  • the invention proposes a central block of a pilot operated seat and / or piston valves To further develop valve systems of the type mentioned at the beginning, that the central block consists of a central block and two releasably on it attached valve blocks, with the middle block two valve sides with one valve block interface each to accept one valve block each comprises, and wherein each valve block has two valve seats, and that the control lines x and y are arranged such that each valve unit can be controlled via a pilot valve that can be attached to the pilot valve interface.
  • a central block trained according to this technical teaching has the advantage that only a single middle block needs to be manufactured, on which the for suitable valve block for the respective application with the associated Valve units (cartridges) is attached.
  • Such valve units are as Manufacturing-optimized screw-in valves (cartridge technology), one enable simple and quick installation. You can now use these valves other components, for example a check valve, an electromagnetic one Proportional control or the like, and / or further valves be attached.
  • pilot valve in one or more control components to disassemble, which are attached to the respective valve and this directly pilot.
  • the pilot valve is controlled by the control components replaced and the control lines are no longer arranged in the central block, but led directly from the control component to the valve.
  • a central block trained according to this technical teaching has the Advantage that with a single center block and only a few valve blocks almost any hydraulic circuit can be implemented. Hence they are Manufacturing and storage costs of the central block system according to the invention significantly lower, since the universally applicable middle and valve blocks in larger quantities can be manufactured and because of that for the specific Hydraulic switching of previously custom-made items is no longer required.
  • Another advantage of the device according to the invention is that the composed of two valve blocks and a middle block, according to the invention Central block can be made smaller than the known Central blocks. This makes the central block lighter and cheaper, because it uses less material. In addition, the smaller and lighter Central block easier to assemble.
  • valve blocks with the desired valve unit (s) (Cartridges) can be screwed to the center block.
  • Hydraulic circuit requirements can be met by replacing a or both valve blocks created a new hydraulic circuit be cast or assembled without a new central block needs, which leads to a significant cost reduction.
  • valve units C 1 , C 2 , C 3 , C 4 are connected to one another via the hydraulic lines in such a way that, by reversing the direction of flow in the hydraulic lines, the valve units C 1 , C 2 , C 3 , C 4 in the opposite direction be flowed through.
  • This achieves a universal construction of the middle block and the valve blocks, so that one and the same middle block can be used for many different hydraulic applications through the use of intelligent circuits.
  • the same central block can be used for different applications and different hydraulic circuits without having to be converted. This further reduces inventory and assembly costs. This also significantly reduces the downtime of the affected machine.
  • valve units controllable diagonally. This allows two valve units to be hydraulic be linked together.
  • the middle block is divided into two different sections.
  • the pump (P) and the tank line (T) are in a rear section of the middle block arranged while the working lines (A) and (B) in a front portion of the center block are arranged.
  • the manufacturing in particular, the casting of the middle block is easier because it is less complicated Casting cores can be used.
  • the pump (P), the tank (T) and / or the working lines (A, B) partly perpendicular and partly parallel to Connection side arranged.
  • Another advantage is that if necessary, subsequently Drilling additional channels further lines can be attached.
  • Yet another advantage is that the short distances and the mostly straight line routing almost no pressure loss and so good like no hysteresis occurs.
  • this is mainly as a fluid distributor used middle block constructed according to the invention so that it has a connection side, has a left, a right valve side and a pilot valve side.
  • a pump line (P) and a tank line (T) each lead from the Connection interface trained connection side to each of the two as Valve block interfaces trained valve sides, and the working line A leads from the connection interface to the left side of the valve, while the Working line B leads to the right side of the valve.
  • the two valve block interfaces of the center block on identical drilling patterns.
  • the valve blocks depending on the application, both on the left, can also be attached to the right side of the valve. This will make the number of the required valve blocks kept low, leading to another Cost reduction leads.
  • valve block interfaces have Point-symmetrically designed drilling patterns. This ensures that the valve blocks turn again after 180 ° about their central axis can be attached to the same side of the valve, reducing the number of required valve blocks can be further reduced.
  • valve block Fastening devices are provided with which further valves or others Components can be attached to the valve block. This is for example then advantageous if, in addition to the seat valve, a check valve, a displacement sensor and / or a second valve is to be attached.
  • Valve block designed as a two-way flow regulator
  • the other Valve block has a press safety control. Only through that Combination of the two valve blocks with the middle block results in a Injection system for a plastic machine.
  • the tank (T) and / or pump line (P) leading connecting lines within the valve block arranged so that they are outside the valve level in the center block interface flow while the others lead to the work lines Connection lines and the connection lines connecting the valves are arranged within the valve level.
  • the connecting lines Similar to the middle block, in two different levels or Sections located. The working lines are within the Valve level created so that on the one hand short distances arise and on the other hand little or sometimes no curvature is required, so that these connecting lines are easy to produce.
  • valve block of a pilot operated seat and / or piston valves Having proposed two or three way valve, in which in Valve block exactly one tank and one pump line is provided, the Tank line in the first valve holder and the pump line in the second Valve holder opens.
  • valve receptacles are via connecting lines either directly or via a work line A or B with each other are connected.
  • the valves are sometimes from the side or sometimes from Flows at the bottom, so that all possible with just a few valve blocks hydraulic circuits can be realized.
  • the connecting lines are over Supplementary lines can be connected to the desired work line, the supplementary lines can be retrofitted to the valve block.
  • valve blocks according to the invention it is possible with only a few Valve blocks that are inexpensively manufactured in large numbers can build any hydraulic circuit. This can either happen that a single valve block with suitable valve units (Cartridges) to a 2 or 3 way valve or that two valve blocks with corresponding valve units (cartridges) on one Middle block can be mounted to build a 3, 4 or 5 way valve.
  • suitable valve units Cartridges
  • two valve blocks with corresponding valve units Cartridges
  • valve blocks i.e. the hydraulic lines are closed on one side. Only when it is certain which line (P, T, A, B, x, y) is required for the respective circuit, this is opened, for example, by drilling.
  • FIG. 0 shows a schematic diagram of a hydraulic control block with a known hydraulic circuit with four valve units C 1 , C 2 , C 3 , C 4 .
  • the four valve units C 1 , C 2 , C 3 , C 4 are arranged in two valve blocks, which are fastened to a central block, as will be described in more detail below.
  • the hydraulic lines shown schematically in this schematic diagram are implemented in the middle block and in the valve blocks and create hydraulic connections between the individual valves.
  • FIGS. 1 and 2a to 2c An embodiment of a center block 2 according to the invention is shown in FIGS. 1 and 2a to 2c .
  • the middle block 2 comprises a connection side 4 , a left valve side 6 , a pilot valve side 8 and a right valve side 10 . All sides of the middle block 2 are provided with interfaces so that the middle block 2 can be connected to other components.
  • a connection interface 12 and to the pilot valve side 12 a pilot valve interface 13 is formed, both of which have a standardized hole pattern in accordance with DIN 24 340.
  • the center block 2 shown here is designed for a hydraulic system with a nominal size of 16 mm and can be connected to corresponding hydraulic systems without any problems thanks to its standardized connection interface 12 .
  • the center block 2 is designed for hydraulic systems with a nominal width of 6 mm, 10 mm, 25 mm, 32 mm or 50 mm and has the connection interface 12 corresponding to the respective nominal width in accordance with DIN 24 340.
  • the pilot valve interface 13 is the same for all embodiments and corresponds to the drilling pattern of DIN 24340 for NG 06.
  • the middle block 2 is used as a kind of fluid distributor, because with its pump line P , its tank line T , its two working lines A and B and the control lines x and y (not shown in FIG. 1), the one coming or flowing out of the corresponding lines of the hydraulic system becomes Fluid distributed to the respective valves.
  • the center block 2 additionally has control lines 14 through which a pilot valve attached to the pilot valve side 8 can control the other valves.
  • the lines within the middle block 2 are located in two different sections or layers: a front portion 16 and a rear portion 20.
  • the working lines A and B run, wherein the working line A, the connection interface 12 with a valve block interface 22 of the connects the left valve side 6 , while the working line B connects the connection interface 12 with the valve block interface 24 of the right valve side 10 .
  • the longitudinal axes of the respective line do not run in one plane, but slightly spaced apart.
  • the horizontal segments 25 of the hydraulic line P, T, A and B shown in dashed lines, are slightly offset with respect to the vertical segments P, T, A and B, but are located within the same section 16 and 20, respectively .
  • control lines 14 extend from the connection side 4 to the pilot valve side 8 and connect the right and left valve sides 6, 10 to the connection side 4 and the pilot valve side 8, but the control lines 14 do not run in one of the sections 16 or 20 , but rather they run irregularly within the middle block 2 .
  • both the tank T and the pump line P run. Both lines connect the connection side 4 to each of the two valve sides 6, 10 and, like the working lines A, B, run partly vertically and partly parallel to connection side 4 .
  • tank line T and the pump line P run substantially within the rear section 20 , the tank line T must be directed around the point at which it meets the pump line P so that it comes out of the rear section at this point 20 leads out a little.
  • valve block interface 22, 24 are identical, so that a valve block (not shown in FIG. 1) can be attached either to the left 6 or to the right valve side 10 .
  • control lines 14 are not shown in FIG. 1 in order to make the illustration clearer.
  • FIGS. 3 and 4 show two exemplary embodiments of a valve system according to the invention, in which the middle block 2 used as a fluid distributor is of identical design.
  • a valve block 70 is attached to both the right valve side 10 and the left valve side 6 , the valves 30 of which are designed as seat valves.
  • the valve blocks 70 are connected to a connecting line 72 such that the valves 30 are connected in series.
  • Electromagnetic proportional controls 31 are attached to the valves 30 in order to be able to open and close in a controlled manner.
  • the valve 30 together with the proportional control 31 is available as a prefabricated valve unit (cartridge). This cartridge then only needs to be inserted into the corresponding valve receptacle 34 .
  • a control block provided with such a directional valve comes without one Pilot valve and is mainly used in machine equipment hanging loads that must be very tight.
  • Such machine facilities are, for example, cranes, presses or fire ladders.
  • valve blocks 50 are attached to the middle block 2 , the valves 33 of which have a parallel connection.
  • a pilot valve 32 is connected to the pilot valve side 8 of the middle block 2 and controls the individual valves 33 mounted in the valve blocks 50 via the control lines 14 .
  • hydrostatically controlled check valves 35 are attached, so that each valve unit (cartridge) fitted in the valve receptacles 34, 36 consists of the valve 33 and the check valve 35 and forms a 2/2-way valve of a logic element in the basic function.
  • FIG. 3 and FIG. 4 are merely exemplary. Rather, it is entirely possible to attach any valves and valve blocks in any combination to the middle block 2 . This also includes the pilot valve 32 . It is also possible to attach two different valve blocks to the middle block 2 .
  • valve blocks 50, 60, 70, 80, 90, 100, 110, 120 are shown in FIGS. 5 to 12 , all of which are compatible with the middle block 2 . All valve blocks 50, 60, 70, 80, 90, 100, 110, 120 have two valve seats 34, 36 into which a valve can be inserted. This technique is well known as a cartridge technique. The control lines x, y are not shown here in order to make the illustration clearer.
  • each valve block 50, 60, 70, 80, 90, 100, 110, 120 has fastening devices, not shown, for receiving further valves, electromagnetic proportional controls, pickups, pilot control devices or the like.
  • valve seats 34, 36 are arranged axially parallel and are located in a valve plane 40 arranged perpendicular to the center block interface 38 .
  • the valve blocks 50, 60, 70, 80, 90, 100 have at least one pump 42 ' and one tank connection line 42 , which have a valve space 44 formed by the valve 30, 33 and the valve receptacle 34, 36 with the tank ( T ) or pump line ( P ) connects.
  • This pump and connection line 42, 42 ' is not located in the valve level 40 , but leads from the valve level 40 to a level corresponding to the rear section 20 .
  • the valve level 40 corresponds to the front section 16 .
  • the valve blocks 110 and 120 each have a pump and a tank connection line 42, 42 ' , which connects the valve tip to the tank ( T ) or pump line ( P ).
  • valve block 40 shown in FIG. 5 has a parallel connection of the valve units, the working lines 52, 54 leading from the valve receptacle 34, 36 to the middle block interface 38 being located within the valve level 40 .
  • valve block 60 shown in FIG. 6 the valve units are connected in parallel.
  • This valve block 60 corresponds to the valve block 50 shown in FIG. 5 , but additionally has a connecting line 62 from the outlet of the valve receptacle 34 into the valve chamber 46 of the valve receptacle 36 .
  • valve block 70 shown in FIG. 7 corresponds to the valve block 60 shown in FIG. 6 , except that the valve block 70 has no connection from the valve receptacle 34 to the working line A or B.
  • valve block 80 shown in FIG. 8 corresponds to the valve block 70 shown in FIG. 7 , but with a mirror-inverted design of the connecting lines 82 and 84 .
  • valve block 90 In the valve block 90 shown in FIG. 9 , the valve units are connected in series as in the valve blocks 70 and 80 , but the control in the valve block 90 takes place inversely in a valve unit.
  • the outputs of the valve receptacles 34 and 36 are connected by a working line 92 without a connection to a working line A or B.
  • the valve block 100 shown in FIG. 10 has two valve receptacles 34, 36 connected in parallel, which are connected to one another by a connecting line 102 .
  • valve block 110 shown in FIG. 11 corresponds to the valve block 70 shown in FIG. 7 , but the pump and tank lines 42 , 42 'lead to the tip of the valve and not to the valve chamber.
  • valve block 120 shown in FIG. 12 corresponds to the valve block 100 shown in FIG. 10 , but the pump / tank line 42 ′ leads to the tip of the valve and not to the valve chamber.
  • All valve blocks 50 to 120 shown in FIGS. 5 to 12 can be connected to the valve block location 22, 24 of the middle block 2 .
  • the line that is not required is sealed in such a way that the functioning of the hydraulic directional control valve as a whole is not impaired and that no hydraulic oil leaks out of the corresponding connection. This sealing takes place, for example, with a plug, closure or the like, not shown.
  • All valve blocks 50 to 120 are also equipped with control lines (x, y) 14 , as is shown by way of example in FIGS. 2 and 4 .
  • the control lines are not shown in the other figures in order to make the figure clearer.
  • any hydraulic circuit can be generated by combining the middle block 2 with one or two valve blocks 50 to 120 and suitable valve units installed in the valve receptacle 34, 36 .
  • the hydraulic directional control valve can be produced inexpensively in a modular design and there is the possibility of replacing the existing hydraulic circuit at any time with another hydraulic circuit by replacing individual valves and / or individual valve blocks with others.
  • this control block comprises a valve block 70 according to FIG. 7, to which two valve units, each with a valve 30 and a check valve 35, are attached.
  • the valve block 70 is attached to a connection plate 130 , to which the hydraulic lines P, T, A, x and y are also connected.
  • valve blocks 50, 60, 70, 80, 90, 100, 110, 120 can also be used to create a small control block.
  • the selection of the desired valve block depends only on the switching conditions required in the individual application, since all valve blocks according to one of FIGS. 5 to 12 are designed to be compatible with the connection plate 130 .
  • the pump line 42 ′ leads to the second valve receptacle 36 , while the tank line 42 is connected to the first valve receptacle 34 .
  • the embodiments shown in FIGS. 6 to 12 connect the valve receptacles 34, 36 directly to one another via connecting lines 52, 54, 62, 72, 84, 92, 102, 112, 122 .
  • the valve receptacles 34, 36 are connected to one another via the working line A or B.
  • supplementary lines are subsequently drilled into the valve block 60, 70, 80, 90, 100, 110, 120 , which the respective connection line 52, 54, 62, 72, 84, 92, 102, 112, 122 or the valve receptacle 34 , 36 connect to work line A or B.
  • the hydraulic lines are in the middle block and in the valve blocks designed so that when the flow direction is reversed flow through the valves in reverse, so that at existing blocks may only be changed by switching the Valves a new hydraulic circuit for a new application emerges.
  • control lines z 1 and z 2 are also provided in the central block in addition to the control lines x and y .
  • the latter serve to hydraulically connect the valves to external devices.
  • the middle block and in the valve blocks one or more hydraulic lines as Blind pockets designed, d. H. the corresponding hydraulic line is not a through line, but one-sided locked.
  • the pump, the tank, the working and the Control lines starting from the connection interface through the whole misplaced, but end shortly before each exit point, so that a thin Wall remains that is strong enough to withstand the operating pressure. Consequently
  • a middle block is created for any circuit can be used, because only when it is certain which cable is used, it is opened, in particular drilled out.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Housings (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

Die vorliegende Erfindung betrifft einen Zentralblock eines vorgesteuerte Sitz- und/oder Kolbenventile aufweisenden Ventilsystems, der sowohl eine vorzugsweise genormte Anschlußschnittstelle, als auch eine Pilotventilschnittstelle zur Aufnahme eines Pilotventils aufweist, und der eine Pump- (P), eine Tank- (T), eine erste Arbeitsleitung (A), eine zweite Arbeitsleitung (B), eine erste Steuerleitung x und eine zweite Steuerleitung y aufweist, und in dem vier Ventilaufnahmen zur Aufnahme von je einer Ventileinheit (C1, C2, C3, C4) angeordnet sind.The present invention relates to a central block of a piloted valve and / or piston valve system, which has both a preferably standardized connection interface and a pilot valve interface for receiving a pilot valve, and which has a pump (P), a tank (T), has a first working line (A), a second working line (B), a first control line x and a second control line y, and in which four valve receptacles for accommodating one valve unit each (C 1 , C 2 , C 3 , C 4 ) are arranged are.

Ventilsysteme mit vorgesteuerten Sitz- und/oder Kolbenventilen und mit einem derartigen Zentralblock sind beispielsweise aus der DE-OS 36 04 410, der GB 2,212,220 A oder der EP 0 473 030 A1 bekannt.Valve systems with pilot operated seat and / or piston valves and with such a central block are for example from DE-OS 36 04 410, GB 2,212,220 A or EP 0 473 030 A1.

Aus der DE-OS 36 04 410 ist ein hydraulischer Steuerblock mit einem Pilotventil, einem vier Wegeventil, welches durch das Pilotventil vorgesteuert wird, einem Druckminderer, einem Rückschlagventil und einem Drosselrückschlagventil bekannt. Dabei ist jedes der vorgenannten Elemente in einem eigenständigen Gehäuseblock aus Gußeisen untergebracht und nur über entsprechende Hydraulikleitungen mit den anderen Gehäuseblöcken verbunden.From DE-OS 36 04 410 is a hydraulic control block with a Pilot valve, a four-way valve, which is pilot-controlled by the pilot valve a pressure reducer, a check valve and a throttle check valve known. Each of the aforementioned elements is in one independent housing block made of cast iron and only with appropriate Hydraulic lines connected to the other housing blocks.

Aus der GB 2,212,220 A oder der EP 0 473 030 A1 ist ein proportional vier Wegeventil mit vorgesteuerten Sitzventilen bekannt, welches wie das vier Wegeventil der DE-OS 36 04 410 in einem speziell hierfür aus Eisen gegossenem Gehäuseblock untergebracht ist. Dieser nachfolgend als Zentralblock bezeichnete Gehäuseblock zur Aufnahme der Ventileinheiten ist mit Hydraulikleitungen durchsetzt, die die vier im Zentralblock angeordneten Ventileinheiten hydraulisch miteinander verbinden. From GB 2,212,220 A or EP 0 473 030 A1 one is proportional to four Directional control valve with pilot operated poppet valves known, which like the four Directional control valve of DE-OS 36 04 410 in a specially cast iron for this Housing block is housed. This subsequently as the central block designated housing block for receiving the valve units is with hydraulic lines penetrates the four valve units arranged in the central block connect hydraulically.

Als Ventileinheiten werden fertigungsoptimierte Sitz- oder kombinierte Kolben-Sitzventile eingesetzt, die in entsprechende im Zentralblock vorgesehene Ventilaufnahmen einsetzbar sind. Diese Ventile werden dann mit einem im Zentralblock verschraubten Deckel fixiert. An diese Ventile können nun je nach Einsatzgebiet weitere Komponenten, zum Beispiel ein Rückschlagventil, eine elektro-magnetische Proportionalsteuerung oder dergleichen, und/oder weitere Ventile angebracht werden. Derartige Ventileinheiten werden als sogenannte Cartridge (Cartridge-Technik) bezeichnet.Production-optimized seat or combined piston-seat valves are used as valve units used in the corresponding provided in the central block Valve mounts can be used. These valves are then with an in Central block screwed lid fixed. At these valves can now Depending on the area of application, other components, such as a check valve, an electromagnetic proportional control or the like, and / or additional valves can be attached. Such valve units are called so-called cartridge (cartridge technology) called.

Die Unterseite des Steuerblocks (DE 36 04 410), bzw. die Unterseite des Zentralblocks (EP 0 473 030) ist als Anschlußschnittstelle ausgebildet und hat ein nach DIN 24340 genormtes Bohrbild, so daß der Steuerblock bzw. der Zentralblock an nahezu jedes neue und bestehende Hydrauliksystem angeschlossen werden kann.The bottom of the control block (DE 36 04 410), or the bottom of the Central block (EP 0 473 030) is designed as a connection interface and has a drilling pattern standardized according to DIN 24340, so that the control block or the Central block to almost every new and existing hydraulic system can be connected.

Die im Zentralblock untergebrachten Ventile können auf verschiedene Art miteinander verbunden werden. Hierzu werden die Ventile nach den Gesetzen der Logik durch "und", "oder" oder "nicht und" Verknüpfungen miteinander verbunden. Durch Auswahl geeigneter Ventileinheiten (Cartridges) und durch geeignetes Kombinieren der Ventileinheiten können somit Hydraulikschaltungen für nahezu alle Anwendungen realisiert werden.The valves housed in the central block can be of various types be connected to each other. For this purpose, the valves according to the laws logic through "and", "or" or "not and" links with each other connected. By selecting suitable valve units (cartridges) and by A suitable combination of the valve units can thus hydraulic circuits can be implemented for almost all applications.

Für jede Anwendung ist eine andere Verknüpfung der Ventile erforderlich, so daß für jede Anwendung ein eigener Zentralblock mit für die jeweilige hydraulische Schaltung spezifischen Hydraulikverbindungen gegossen werden muß, was hohe Fertigungskosten zur Folge hat. Durch die Tatsache, daß die Verbindungsleitungen mitunter schräg, diagonal oder verwinkelt verlaufen, müssen diese in Form eines Kernes beim Gießen miteingearbeitet werden, wodurch die Fertigung eines derartigen Zentralblockes weiter verteuert wird.A different connection of the valves is required for each application, so that for each application a separate central block with for each hydraulic circuit specific hydraulic connections are cast must, which has high manufacturing costs. The fact that the Connection lines sometimes run diagonally, diagonally or at an angle, these have to be incorporated in the form of a core during casting, whereby the production of such a central block is made more expensive.

Aufgrund der Tatsache, daß für jede Anwendung ein eigener Zentralblock hergestellt werden muß, wird auch die Lagerhaltung und die Vorhaltung von Ersatzzentralblöcken sehr kostenaufwendig.Due to the fact that a separate central block for each application Warehousing and the provision of Replacement central blocks are very expensive.

Beim Einsatz dieser Ventilsysteme beispielsweise bei Kunststoffspritzmaschinen oder bei Industrierobotern kann es vorkommen, daß nach einiger Zeit ein andere Anwendungsfall zum Einsatz kommt, so daß eine geänderte hydraulische Schaltung in der Kunststoffspritzmaschine oder im Industrieroboter eingesetzt werden muß. In diesem Fall muß der gesamte Zentralblock ausgetauscht werden und gegen einen neuen ersetzt werden, so daß sehr hohe Material- und Montagekosten entstehen.When using these valve systems, for example in plastic injection molding machines or with industrial robots it can happen that after some Another application is used at times, so that a modified one hydraulic circuit in the plastic injection machine or in the industrial robot must be used. In this case, the entire central block be replaced and replaced with a new one, so very much high material and assembly costs arise.

Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen Zentralblock eines vorgesteuerte Sitz- und/oder Kolbenventile aufweisenden Ventilsystems zu schaffen, der universell für beliebig viele hydraulische Schaltungen eingesetzt werden kann und dessen hydraulische Schaltung in einfacher Weise veränderbar ist.Proceeding from this, the present invention is based on the object a central block of a pilot operated seat and / or piston valve valve system to create, the universal for any number hydraulic circuits can be used and its hydraulic Circuit can be changed in a simple manner.

Als technische Lösung dieser Aufgabe wird erfindungsgemäß vorgeschlagen, einen Zentralblock eines vorgesteuerte Sitz- und/oder Kolbenventile aufweisenden Ventilsystems der eingangs genannten Art dahingehend weiterzubilden, daß sich der Zentralblock aus einem Mittelblock und zwei lösbar daran befestigten Ventilblöcken zusammensetzt, wobei der Mittelblock zwei Ventilseiten mit je einer Ventilblockschnittstelle zur Aufnahme je eines Ventilblockes umfaßt, und wobei jeder Ventilblock zwei Ventilaufnahmen aufweist, und daß die Steuerleitungen x und y derart angeordnet sind, daß jede Ventileinheit über ein an der Pilotventilschnittstelle anbringbares Pilotventil ansteuerbar ist.As a technical solution to this problem, the invention proposes a central block of a pilot operated seat and / or piston valves To further develop valve systems of the type mentioned at the beginning, that the central block consists of a central block and two releasably on it attached valve blocks, with the middle block two valve sides with one valve block interface each to accept one valve block each comprises, and wherein each valve block has two valve seats, and that the control lines x and y are arranged such that each valve unit can be controlled via a pilot valve that can be attached to the pilot valve interface.

Ein nach dieser technischen Lehre ausgebildeter Zentralblock hat den Vorteil, daß nur ein einziger Mittelblock hergestellt werden braucht, an dem der für den jeweiligen Anwendungsfall geeignete Ventilblock mit den dazugehörigen Ventileinheiten (Cartridges) angebaut wird. Derartige Ventileinheiten sind als fertigungsoptimierte Einschraubventile (Cartridge-Technik) ausgeführt, die eine einfache und schnelle Montage ermöglichen. An diese Ventile können nun weitere Komponenten, zum Beispiel ein Rückschlagventil, eine elektromagnetische Proportionalsteuerung oder dergleichen, und/oder weitere Ventile angebracht werden.A central block trained according to this technical teaching has the advantage that only a single middle block needs to be manufactured, on which the for suitable valve block for the respective application with the associated Valve units (cartridges) is attached. Such valve units are as Manufacturing-optimized screw-in valves (cartridge technology), one enable simple and quick installation. You can now use these valves other components, for example a check valve, an electromagnetic one Proportional control or the like, and / or further valves be attached.

Auch ist es möglich das Pilotventil in eine oder mehrere Steuerkomponenten zu zerlegen, die an dem jeweiligen Ventil angebracht werden und dieses direkt vorsteuern. In diesem Fall wird das Pilotventil durch die Steuerkomponenten ersetzt und die Steuerleitungen werden nicht mehr im Zentralblock angeordnet, sondern extern direkt von der Steuerkomponente zum Ventil geführt.It is also possible to have the pilot valve in one or more control components to disassemble, which are attached to the respective valve and this directly pilot. In this case, the pilot valve is controlled by the control components replaced and the control lines are no longer arranged in the central block, but led directly from the control component to the valve.

Mit der vorliegenden Erfindung ist es möglich, mit einem einzigen Mittelblock, vorzugsweise acht verschiedenen Ventilblöcken und geeigneten Cartridgen ein System zu schaffen, mit dem nahezu sämtliche im Stand der Technik bekannten 3, 4 oder 5 Wege Ventile realisiert werden können. Dies ist deshalb möglich weil durch Kombination des Mittelblocks mit den jeweils geeigneten Ventilblöcken ein die jeweils gewünschte hydraulische Schaltung aufweisender Zentralblock geschaffen werden kann. Diese hydraulische Schaltung unterliegt ähnlichen Gesetzmäßigkeiten wie eine elektronische Schaltung.With the present invention it is possible to use a single center block, preferably eight different valve blocks and suitable cartridges To create system with which almost all in the prior art known 3, 4 or 5 way valves can be realized. This is possible because by combining the middle block with each suitable valve blocks the desired hydraulic circuit having central block can be created. This hydraulic Switching is subject to similar laws as an electronic one Circuit.

Hierdurch braucht nicht mehr für jeden Zentralblock ein eigenes Gußwerkzeug erstellt werden, sondern ein einziges Gußwerkzeug zur Herstellung des Mittelblocks ist für alle Anwendungen ausreichend.This means that a separate casting tool is no longer required for each central block be created, but a single mold for producing the Middle block is sufficient for all applications.

Somit hat ein nach dieser technischen Lehre ausgebildeter Zentralblock den Vorteil, daß mit einem einzigen Mittelblock und nur wenigen Ventilblöcken nahezu jede beliebige hydraulische Schaltung realisierbar ist. Folglich sind die Herstellungs- und die Lagerkosten des erfindungsgemäßen Zentralblocksystem deutlich niedriger, da die universell einsetzbaren Mittel- und Ventilblöcke in größeren Stückszahlen gefertigt werden können und da die für die spezifische hydraulische Schaltung bislang erorderliche Einzelanfertigung entfällt. Thus, a central block trained according to this technical teaching has the Advantage that with a single center block and only a few valve blocks almost any hydraulic circuit can be implemented. Hence they are Manufacturing and storage costs of the central block system according to the invention significantly lower, since the universally applicable middle and valve blocks in larger quantities can be manufactured and because of that for the specific Hydraulic switching of previously custom-made items is no longer required.

Ein weiterer Vorteil der erfindungsgemäßen Vorrichtung besteht darin, daß der aus zwei Ventilblöcken und einem Mittelblock zusammengesetzte, erfindungsgemäße Zentralblock kleiner ausgebildet werden kann, als die bekannten Zentralblöcke. Hierdurch wird der Zentralblock leichter und kostengünstiger, da er weniger Material benötigt. Außerdem ist der kleinere und leichtere Zentralblock einfacher zu montieren.Another advantage of the device according to the invention is that the composed of two valve blocks and a middle block, according to the invention Central block can be made smaller than the known Central blocks. This makes the central block lighter and cheaper, because it uses less material. In addition, the smaller and lighter Central block easier to assemble.

Noch ein weiterer Vorteil der erfindungsgemäßen Vorrichtung besteht darin, daß die Ventilblöcke mit der oder den jeweils gewünschten Ventileinheit(en) (Cartridges) an den Mittelblock angeschraubt werden können. Bei geänderten Anforderungen an die hydraulische Schaltung kann durch Austauschen eines oder beider Ventilblöcke eine neue hydraulische Schaltung geschaffen werden, ohne daß ein neuer Zentralblock gegossen bzw montiert werden braucht, was zu einer deutlichen Kostensenkung führt.Yet another advantage of the device according to the invention is that that the valve blocks with the desired valve unit (s) (Cartridges) can be screwed to the center block. With changed Hydraulic circuit requirements can be met by replacing a or both valve blocks created a new hydraulic circuit be cast or assembled without a new central block needs, which leads to a significant cost reduction.

In einer bevorzugten Ausführungsform sind die Ventileinheiten C1, C2, C3, C4 über die Hydraulikleitungen derart miteinander verbunden, daß durch Umkehrung der Strömungsrichtung in den Hydraulikleitungen auch die Ventileinheiten C1, C2, C3, C4 in umgekehrter Richtung durchströmt werden. Hierdurch wird ein universeller Aufbau des Mittelblockes und der Ventilblöcke erreicht, so daß ein und derselbe Mittelblock durch den Einsatz von intelligenten Schaltungen für viele verschiedene hydraulische Anwendungen eingesetzt werden kann. Folglich kann ein und derselbe Zentralblock für verschiedene Anwendungen und verschiedene hydraulische Schaltungen eingesetzt werden, ohne daß er umgerüstet werden braucht. Dies senkt die Lagerhaltungs- und die Montagekosten weiter. Auch werden hierdurch die Standzeiten der betroffenen Maschine deutlich redurziert.In a preferred embodiment, the valve units C 1 , C 2 , C 3 , C 4 are connected to one another via the hydraulic lines in such a way that, by reversing the direction of flow in the hydraulic lines, the valve units C 1 , C 2 , C 3 , C 4 in the opposite direction be flowed through. This achieves a universal construction of the middle block and the valve blocks, so that one and the same middle block can be used for many different hydraulic applications through the use of intelligent circuits. As a result, the same central block can be used for different applications and different hydraulic circuits without having to be converted. This further reduces inventory and assembly costs. This also significantly reduces the downtime of the affected machine.

In einer weiteren bevorzugten Ausführungsform sind die Ventileinheiten diagonal ansteuerbar. Hierdurch können zwei Ventileinheiten hydraulisch miteinander verknüpft werden. In a further preferred embodiment, the valve units controllable diagonally. This allows two valve units to be hydraulic be linked together.

In einer anderen, bevorzugten Weiterbildung des erfindungsgemäßen Zentralblockes ist der Mittelblock in zwei unterschiedliche Abschnitte unterteilt ist. Dabei ist die Pump- (P) und die Tankleitung (T) in einem hinteren Abschnitt des Mittel-blocks angeordnet, während die Arbeitsleitungen (A) und (B) in einem vorderen Abschnitt des Mittelblocks angeordnet sind. Durch diese räumliche Trennung der hydraulischen Leitungen wird die Fertigung, insbesondere das Giessen des Mittelblock erleichtert, da weniger komplizierte Giesskerne eingesetzt werden können.In another preferred development of the central block according to the invention the middle block is divided into two different sections. The pump (P) and the tank line (T) are in a rear section of the middle block arranged while the working lines (A) and (B) in a front portion of the center block are arranged. Through this spatial separation of the hydraulic lines is the manufacturing, in particular, the casting of the middle block is easier because it is less complicated Casting cores can be used.

In einer bevorzugten Weiterbildung sind die Pump- (P), die Tank- (T) und/oder die Arbeitsleitungen (A, B) teilweise senkrecht und teilweise parallel zur Anschlußseite angeordnet.In a preferred development, the pump (P), the tank (T) and / or the working lines (A, B) partly perpendicular and partly parallel to Connection side arranged.

Diese senkrechte bzw. parallele Anordnung der hydraulischen Leitungen hat den Vorteil, daß die Leitungen nicht mehr, bzw. nicht mehr alle, mittels eines Kernes in den Mittelblock mit eingegossen werden brauchen, sondern daß es nunmehr möglich ist, die Leitungen nachträglich, zum Beispiel durch Bohren, einzuarbeiten.Has this vertical or parallel arrangement of the hydraulic lines the advantage that the lines are no longer, or not all, by means of a Kernes need to be cast in the middle block, but that it it is now possible to retrofit the lines, for example by drilling, to incorporate.

Ein weiterer Vorteil besteht darin, daß gegebenenfalls nachträglich durch Bohren weitere Kanäle weitere Leitungen angebracht werden können.Another advantage is that if necessary, subsequently Drilling additional channels further lines can be attached.

Noch ein weiterer Vorteil besteht darin, daß durch die kurzen Wege und die meist geradlinige Leitungsführung so gut wie kein Druckverlust und so gut wie keine Hysterese auftritt.Yet another advantage is that the short distances and the mostly straight line routing almost no pressure loss and so good like no hysteresis occurs.

In einer vorteilhaften Weiterbildung ist der hauptsächlich als Fluidverteiler eingesetzte Mittelblock erfindungsgemäß so aufgebaut, daß er eine Anschlußseite, eine linke, eine rechte Ventilseite und eine Pilotventilseite aufweist. Dabei führt jeweils eine Pump- (P) und eine Tankleitung (T) von der als Anschlußschnittstelle ausgebildeten Anschlußseite zu jeder der beiden als Ventilblockschnittstellen ausgebildeten Ventilseiten, und die Arbeitsleitung A führt von der Anschlußschnittstelle zur linken Ventilseite, während die Arbeitsleitung B zur rechten Ventilseite führt.In an advantageous development, this is mainly as a fluid distributor used middle block constructed according to the invention so that it has a connection side, has a left, a right valve side and a pilot valve side. A pump line (P) and a tank line (T) each lead from the Connection interface trained connection side to each of the two as Valve block interfaces trained valve sides, and the working line A leads from the connection interface to the left side of the valve, while the Working line B leads to the right side of the valve.

Hierdurch ist es möglich, beide Ventilblöcke an die Pump- (P) und an die Tankleitung (T) anzuschließen, und daß die beiden linken Ventileinheiten die Arbeitsleitung A steuern, während die beiden rechten Ventileinheiten die Arbeitsleitung B steuern. Durch die Auswahl geeigneter Ventileinheiten und deren Steuerung ist es somit möglich, nahezu jede hydraulische Schaltung zu erzeugen.This makes it possible to connect both valve blocks to the pump (P) and to the Connect tank line (T), and that the two left valve units the Control working line A while the two right valve units control the Control work line B. By selecting suitable valve units and their control makes it possible to switch almost any hydraulic circuit produce.

Um die für den jeweiligen Anwendungsfall erforderliche hydraulische Schaltung zu erzeugen, wird der erfindungsgemäß ausgebildete Mittelblock mit zwei für die jeweilige Anwendung geeigneten Ventilblöcken kombiniert. Um nahezu sämtliche hydraulischen Schaltungen zu realisieren sind nur wenige unterschiedliche Typen von Ventilblöcken notwendig, wie in der Figurenbeschreibung näher beschrieben werden wird. Hierbei haben alle Ventilblöcke eine mit der Ventilblockschnittstelle des Mittelblocks kompatible Schnittstelle.The hydraulic circuit required for the respective application To generate, the middle block designed according to the invention with combined two valve blocks suitable for the respective application. Around Almost all hydraulic circuits are only a few different types of valve blocks necessary, as in the description of the figures will be described in more detail. Here, all valve blocks have an interface compatible with the valve block interface of the middle block.

In einer besonders bevorzugten Ausführungsform weisen die beiden Ventilblockschnittstellen des Mittelblockes identische Bohrbilder auf. Dies hat den Vorteil, daß die Ventilblöcke, je nach Anwendungsfall, sowohl an der linken, als auch an der rechten Ventilseite anbrinbar sind. Hierdurch wird die Zahl der benötigten Ventilblöcke gering gehalten, was zu einer weiteren Kostensenkung führt.In a particularly preferred embodiment, the two valve block interfaces of the center block on identical drilling patterns. This has the Advantage that the valve blocks, depending on the application, both on the left, can also be attached to the right side of the valve. This will make the number of the required valve blocks kept low, leading to another Cost reduction leads.

In einer weiteren, bevorzugten Weiterbildung weisen die Ventilblockschnittstellen punksymetrisch ausgebildete Bohrbilder auf. Hierdurch wird erreicht, daß die Ventilblöcke auch nach drehen um 180° um ihre Mittelachse wieder an derselben Ventilseite angebracht werden können, wodurch die Anzahl der benötigten Ventilblöcke weiter verringert werden kann.In a further preferred development, the valve block interfaces have Point-symmetrically designed drilling patterns. This ensures that the valve blocks turn again after 180 ° about their central axis can be attached to the same side of the valve, reducing the number of required valve blocks can be further reduced.

In einer anderen, bevorzugten Ausführungsform sind am Ventilblock Befestigungsvorrichtungen vorgesehen, mit denen weitere Ventile oder andere Komponenten am Ventilblock befestigt werden können. Dies ist zum Beispiel dann vorteilhaft, wenn zusätzlich zum Sitzventil noch ein Rückschlagventil, ein Wegaufnehmer und/oder ein zweites Ventil anzubringen ist.In another preferred embodiment are on the valve block Fastening devices are provided with which further valves or others Components can be attached to the valve block. This is for example then advantageous if, in addition to the seat valve, a check valve, a displacement sensor and / or a second valve is to be attached.

Beispielsweise ist für ein Einspritzsystem einer Kunststoffmaschine ein Ventilblock als Zwei-Wege-Mengenregler ausgebildet, während der andere Ventilblock eine Pressen-Sicherheitssteuerung aufweist. Erst durch die Kombination der beiden Ventilblöcke mit dem Mittelblock entsteht ein Einspritzsystem für eine Kunststoffmaschine.For example, for an injection system of a plastic machine Valve block designed as a two-way flow regulator, while the other Valve block has a press safety control. Only through that Combination of the two valve blocks with the middle block results in a Injection system for a plastic machine.

In einer weiteren, bevorzugten Ausführungsform sind die zu der Tank- (T) und/oder Pumpleitung (P) führenden Anschlußleitungen innerhalb des Ventilblockes so angeordnet, daß sie außerhalb der Ventilebene in die Mittelblockschnittstelle münden, während die anderen, zu den Arbeitsleitungen führenden Anschlußleitungen und die die Ventile verbindenen Anschlußleitungen innerhalb der Ventilebene angeordnet sind. Hierdurch werden die Anschlußleitungen, ähnlich wie beim Mittelblock, in zwei verschiedenen Ebenen bzw. Abschnitten angesiedelt. Dabei sind die Arbeitsleitungen innerhalb der Ventilebene angelegt, so daß einerseits kurze Wege entstehen und andererseits wenig bzw. teilweise sogar gar keine Krümmung erforderlich ist, so daß diese Anschlußleitungen einfach zu erzeugen sind.In a further preferred embodiment, the tank (T) and / or pump line (P) leading connecting lines within the valve block arranged so that they are outside the valve level in the center block interface flow while the others lead to the work lines Connection lines and the connection lines connecting the valves are arranged within the valve level. As a result, the connecting lines, Similar to the middle block, in two different levels or Sections located. The working lines are within the Valve level created so that on the one hand short distances arise and on the other hand little or sometimes no curvature is required, so that these connecting lines are easy to produce.

Als weitere technische Lösung der oben genannten Aufgabe wird erfindungsgemäß ein Ventilblock eines vorgesteuerte Sitz- und/oder Kolbenventile aufweisenden zwei oder drei Wegeventils vorgeschlagen, bei dem im Ventilblock genau eine Tank- und eine Pumpleitung vorgesehen ist, wobei die Tankleitung in die erste Ventilaufnahme und die Pumpleitung in die zweite Ventilaufnahme mündet.As a further technical solution to the above object, the invention a valve block of a pilot operated seat and / or piston valves Having proposed two or three way valve, in which in Valve block exactly one tank and one pump line is provided, the Tank line in the first valve holder and the pump line in the second Valve holder opens.

In einer bevorzugten Weiterbildung sind die Ventilaufnahmen über Anschlußleitungen entweder direkt oder über eine Arbeitsleitung A oder B miteinander verbunden sind. Dabei werden die Ventile mal von der Seite oder mal von unten angeströmt, so daß mit wenigen Ventilblöcken sämtliche möglichen hydraulischen Schaltungen realisiert werden können.In a preferred development, the valve receptacles are via connecting lines either directly or via a work line A or B with each other are connected. The valves are sometimes from the side or sometimes from Flows at the bottom, so that all possible with just a few valve blocks hydraulic circuits can be realized.

In einer bevorzugten Weiterbildung sind die Anschlußleitungen über Ergänzungsleitungen mit der gewünschten Arbeitsleitung verbindbar sind, wobei die Ergänzungsleitungen nachträglich am Ventilblock anbringbar sind.In a preferred development, the connecting lines are over Supplementary lines can be connected to the desired work line, the supplementary lines can be retrofitted to the valve block.

Durch diese erfindungsgemäßen Ventilblöcke ist es möglich, mit nur wenigen Ventilblöcken, die kostengünstig in hohen Stückzahlen gefertigt werden können, beliebige hydraulische Schaltungen aufzubauen. Dies kann entweder dadurch geschehen, daß ein einzelner Ventilblock mit geeigneten Ventileinheiten (Cartridges) zu einem 2 oder 3 Wegeventil aufgebaut wird oder daß zwei Ventilblöcke mit entsprechenden Ventileinheiten (Cartridges) an einen Mittelblock montiert werden, um ein 3, 4 oder 5 Wegeventil aufzubauen.Through these valve blocks according to the invention, it is possible with only a few Valve blocks that are inexpensively manufactured in large numbers can build any hydraulic circuit. This can either happen that a single valve block with suitable valve units (Cartridges) to a 2 or 3 way valve or that two valve blocks with corresponding valve units (cartridges) on one Middle block can be mounted to build a 3, 4 or 5 way valve.

In noch einer weiteren, bevorzugten Ausführungsform sind im Mittelblock und in den Ventilblöcken sogenannte Blindtaschen vorgesehen, d, h. die hydraulischen Leitungen sind einseitig verschlossen. Erst wenn feststeht, welche Leitung (P, T, A, B, x, y) für die jeweilige Schaltung benötigt wird, wird diese beispielweise durch aufbohren geöffnet.In yet another preferred embodiment, and so-called blind pockets are provided in the valve blocks, i.e. the hydraulic lines are closed on one side. Only when it is certain which line (P, T, A, B, x, y) is required for the respective circuit, this is opened, for example, by drilling.

Dies hat den Vorteil, daß ein derartiger Mittel- oder Ventilblock universell einsetzbar ist, denn ein und derselbe Block kann für beliebige Schaltungen verwendet werden.This has the advantage that such a central or valve block is universal can be used, because the same block can be used for any circuit be used.

Weitere Vorteile des erfindungsgemäßen Zentralblockes ergeben sich aus der Beschreibung der Ausführungsformen und der beigefügten Zeichnung. Ebenso können die vorstehend genannten und die noch weiter aufgeführten Merkmale erfindungsgemäß jeweils einzeln oder in beliebigen Kombinationen miteinander verwirklicht werden. Die erwähnten Ausführungsformen sind nicht als abschließende Aufzählung zu verstehen, sondern haben vielmehr beispielhaften Charakter. Ausführungsformen der Erfindung sind in den Figuren 1 bis 14 der Zeichnungen dargestellt und werden im folgenden näher erläutert.

Fig. 0
zeigt eine Prinzipdarstellung einer bekannten hydraulischen Schaltung;
Fig. 1
zeigt eine Frontansicht eines erfindungsgemäßen Mittelblocks mit den dazugehörigen Schnittstellen;
Fig. 2a
zeigt einen Schnitt durch den vorderen Abschnitt des Mittelblocks gemäß Fig. 1 entlang Linie IIa - IIa in Fig. 1;
Fig. 2b
zeigt einen Schnitt durch den hinteren Abschnitte des Mittelblocks gemäß Fig. 1 entlang Linie IIb-IIb in Fig. 1;
Fig. 2c
zeigt den Mittelblock gemäß Fig. 1 von unten;
Fig. 3 und 4
zeigen zwei verschiedene Ausführungsformen eines erfindungsgemäßen, hydraulischen Zentralblocks;
Fig. 5 bis 12
zeigen verschiedene Ventilblöcke, die mit dem Mittelblock gemäß Fig. 1 kompatibel sind;
Fig. 13
zeigt ein Wegeventil mit zwei Ventileinheiten;
Fig. 14
zeigt das Schaltbild des Wegeventils gemäß Fig. 13.
Further advantages of the central block according to the invention result from the description of the embodiments and the attached drawing. Likewise, according to the invention, the features mentioned above and those listed further can be implemented individually or in any combination with one another. The mentioned embodiments are not to be understood as an exhaustive list, but rather have an exemplary character. Embodiments of the invention are shown in Figures 1 to 14 of the drawings and are explained in more detail below.
Fig. 0
shows a schematic diagram of a known hydraulic circuit;
Fig. 1
shows a front view of a center block according to the invention with the associated interfaces;
Fig. 2a
shows a section through the front portion of the center block of Figure 1 along line IIa - IIa in Fig. 1.
Fig. 2b
shows a section through the rear portions of the center block of Figure 1 along line IIb-IIb in Fig. 1.
Fig. 2c
shows the middle block of Figure 1 from below.
3 and 4
show two different embodiments of a hydraulic central block according to the invention;
5 to 12
show various valve blocks that are compatible with the center block of FIG. 1;
Fig. 13
shows a directional control valve with two valve units;
Fig. 14
shows the circuit diagram of the directional control valve according to FIG. 13.

Die einzelnen Figuren der Zeichnung zeigen den erfindungsgemäßen Gegenstand teilweise stark schematisiert und sind nicht maßstäblich zu verstehen. Dabei sind die Gegenstände der einzelnen Figuren teilweise stark überproportional vergrößert dargestellt, damit ihr Aufbau besser gezeigt werden kann. The individual figures of the drawing show the subject matter of the invention sometimes highly schematic and are not to be understood to scale. The objects of the individual figures are sometimes disproportionately large shown enlarged so that its structure can be shown better.

In Figur 0 ist eine Prinzipskizze eines hydraulischen Steuerblocks mit einer bekannten hydraulischen Schaltung mit vier Ventileinheiten C1, C2, C3, C4 dargestellt. In der erfindungsgemäßen Ausgestaltung sind die vier Ventileinheiten C1, C2, C3, C4 in zwei Ventilblöcken angeordnet, die an einem Mittelblock befestigt sind, wie nachfolgend näher beschrieben wird. Die in dieser Prinzipskizze schematisch dargestellten hydraulischen Leitungen sind im Mittelblock und in den Ventilblöcken verwirklicht und schaffen hydraulische Verbindungen zwischen den einzelnen Ventilen.FIG. 0 shows a schematic diagram of a hydraulic control block with a known hydraulic circuit with four valve units C 1 , C 2 , C 3 , C 4 . In the embodiment according to the invention, the four valve units C 1 , C 2 , C 3 , C 4 are arranged in two valve blocks, which are fastened to a central block, as will be described in more detail below. The hydraulic lines shown schematically in this schematic diagram are implemented in the middle block and in the valve blocks and create hydraulic connections between the individual valves.

In den Figuren 1 und 2a bis 2c ist eine Ausführungsform eines erfindungsgemäßen Mittelblocks 2 dargestellt. Der Mittelblock 2 umfaßt eine Anschlußseite 4, eine linke Ventilseite 6, eine Pilotventilseite 8 und eine rechte Ventilseite 10. Alle Seiten des Mittelblocks 2 sind mit Schnittstellen versehen, so daß der Mittelblock 2 mit anderen Komponenten verbunden werden kann. An der Anschlußseite 4 ist eine Anschlußschnittstelle 12 und an der Pilotventilseite 12 ist eine Pilotventilschnittstelle 13 ausgebildet, die beide ein gemäß DIN 24 340 genormtes Bohrbild aufweisen. Der hier abgebildete Mittelblock 2 ist für ein Hydrauliksystem mit einer Nenngröße von 16 mm ausgelegt und kann durch seine genormte Anschlußschnittstelle 12 problemlos an entsprechende Hydrauliksysteme angeschlossen werden.An embodiment of a center block 2 according to the invention is shown in FIGS. 1 and 2a to 2c . The middle block 2 comprises a connection side 4 , a left valve side 6 , a pilot valve side 8 and a right valve side 10 . All sides of the middle block 2 are provided with interfaces so that the middle block 2 can be connected to other components. At the connection side 4 is a connection interface 12 and to the pilot valve side 12, a pilot valve interface 13 is formed, both of which have a standardized hole pattern in accordance with DIN 24 340. The center block 2 shown here is designed for a hydraulic system with a nominal size of 16 mm and can be connected to corresponding hydraulic systems without any problems thanks to its standardized connection interface 12 .

In anderen, nicht dargestellten Ausführungsformen ist der Mittelblock 2 für Hydrauliksysteme mit einer Nennweite von 6 mm, 10 mm, 25 mm, 32 mm oder 50 mm ausgelegt und weist die für die jeweilige Nennweite entsprechende Anschlußschnittstelle 12 gemäß den DIN 24 340 auf.In other embodiments, not shown, the center block 2 is designed for hydraulic systems with a nominal width of 6 mm, 10 mm, 25 mm, 32 mm or 50 mm and has the connection interface 12 corresponding to the respective nominal width in accordance with DIN 24 340.

Die Pilotventilschnittstelle 13 hingegen ist für alle Ausführungsformen gleich und entspricht dem Bohrbild der DIN 24340 für NG 06.The pilot valve interface 13, however, is the same for all embodiments and corresponds to the drilling pattern of DIN 24340 for NG 06.

Der Mittelblock 2 wird quasi als Fluidverteiler eingesetzt, denn mit seiner Pumpleitung P, seiner Tankleitung T, seinen beiden Arbeitsleitungen A und B und den (in Figur 1 nicht dargestellten) Steuerleitungen x und y wird das aus den entsprechenden Leitungen des Hydrauliksystems kommende bzw. abfliessende Fluid zu den jeweiligen Ventilen verteilt. In diesen Ausführungsformen weist der Mittelblock 2 zusätzlich noch Steuerleitungen 14 auf, durch die ein an der Pilotventilseite 8 angebrachtes Pilotventil die anderen Ventile steuern kann.The middle block 2 is used as a kind of fluid distributor, because with its pump line P , its tank line T , its two working lines A and B and the control lines x and y (not shown in FIG. 1), the one coming or flowing out of the corresponding lines of the hydraulic system becomes Fluid distributed to the respective valves. In these embodiments, the center block 2 additionally has control lines 14 through which a pilot valve attached to the pilot valve side 8 can control the other valves.

Die Leitungen innerhalb des Mittelblocks 2 befinden sich in zwei verschiedenen Abschnitten bzw. Ebenen: einem vorderen Abschnitt 16 und einem hinteren Abschnitt 20. In dem vorderen Abschnitt 16 verlaufen die Arbeitsleitungen A und B, wobei die Arbeitsleitung A die Anschlußschnittstelle 12 mit einer Ventilblockschnittstelle 22 der linken Ventilseite 6 verbindet, während die Arbeitsleitung B die Anschlußschnittstelle 12 mit der Ventilblockschnittstelle 24 der rechten Ventilseite 10 verbindet. Dabei verlaufen die Längsachsen der jeweiligen Leitung nicht in einer Ebene, sondern leicht beabstandet zueinander. Wie Fig. 2c zu entnehmen ist, verlaufen die gestrichelt dargestellten horizontalen Segmente 25 der Hydraulikleitung P, T, A und B leicht versetzt gegenüber den vertikal verlaufenden Segmenten P, T, A und B, befinden sich jedoch innerhalb desselben Abschnittes 16 bzw. 20. The lines within the middle block 2 are located in two different sections or layers: a front portion 16 and a rear portion 20. In the front portion 16, the working lines A and B run, wherein the working line A, the connection interface 12 with a valve block interface 22 of the connects the left valve side 6 , while the working line B connects the connection interface 12 with the valve block interface 24 of the right valve side 10 . The longitudinal axes of the respective line do not run in one plane, but slightly spaced apart. As can be seen in FIG. 2c , the horizontal segments 25 of the hydraulic line P, T, A and B , shown in dashed lines, are slightly offset with respect to the vertical segments P, T, A and B, but are located within the same section 16 and 20, respectively .

Im Bohrbild 26, 28 der Ventilblockschnittstellen 22, 24 sind je zwei Anschlüsse A bzw. B zu der jeweiligen Arbeitsleitung A bzw. B (siehe Fig. 2a).In the drilling pattern 26, 28 of the valve block interfaces 22, 24 there are two connections A and B to the respective working line A and B (see FIG. 2a ).

Die Steuerleitungen 14 verlaufen ausgehend von der Anschlußseite 4 hin zur Pilotventilseite 8 und verbinden die rechte und die linke Ventilseite 6, 10 mit der Anschlußseite 4 und der Pilotventilseite 8, jedoch verlaufen die Steuerleitungen 14 dabei nicht in einem der Abschnitte 16 oder 20, sondern sie verlaufen unregelmäßig innerhalb des Mittelblockes 2.The control lines 14 extend from the connection side 4 to the pilot valve side 8 and connect the right and left valve sides 6, 10 to the connection side 4 and the pilot valve side 8, but the control lines 14 do not run in one of the sections 16 or 20 , but rather they run irregularly within the middle block 2 .

In dem hinteren Abschnitt 20 (siehe Fig. 2b) verläuft sowohl die Tank- T als auch die Pumpleitung P. Beide Leitungen verbinden die Anschlußseite 4 mit jeder der beiden Ventilseiten 6, 10 und verlaufen ebenso wie die Arbeitsleitungen A, B teilweise senkrecht und teilweise parallel zur Anschlußseite 4. In the rear section 20 (see FIG. 2b ) both the tank T and the pump line P run. Both lines connect the connection side 4 to each of the two valve sides 6, 10 and, like the working lines A, B, run partly vertically and partly parallel to connection side 4 .

Die Tank- T und die Pumpleitung P verlaufen zwar im wesentlichen innerhalb des hinteren Abschnittes 20, jedoch muß die Tankleitung T an der Stelle, an der sie auf die Pumpleitung P trifft um diese herumgelenkt werden, so daß sie an dieser Stelle aus dem hinteren Abschnitt 20 ein wenig herausführt.Although the tank line T and the pump line P run substantially within the rear section 20 , the tank line T must be directed around the point at which it meets the pump line P so that it comes out of the rear section at this point 20 leads out a little.

Die Bohrbilder 26, 28 der Ventilblockschnittstelle 22, 24 sind identisch, so daß ein in der Fig. 1 nicht dargestellter Ventilblock wahlweise an der linken 6 oder an rechten Ventilseite 10 angebracht werden kann.The bore patterns 26, 28 of the valve block interface 22, 24 are identical, so that a valve block ( not shown in FIG. 1) can be attached either to the left 6 or to the right valve side 10 .

In der Fig. 1 sind die Steuerleitungen 14 nicht dargestellt, um die Abbildung übersichtlicher gestalten zu können.The control lines 14 are not shown in FIG. 1 in order to make the illustration clearer.

In den Figuren 3 und 4 sind zwei Ausführungsbeispiele eines erfindungsgemäßen Ventilsystems dargestellt, bei denen der als Fluidverteiler eingesetzte Mittelblock 2 identisch ausgebildet ist.FIGS. 3 and 4 show two exemplary embodiments of a valve system according to the invention, in which the middle block 2 used as a fluid distributor is of identical design.

In der ersten Ausführungsform gemäß Figur 3 ist sowohl an der rechten Ventilseite 10, als auch an der linken Ventilseite 6 jeweils ein Ventilblock 70 angebracht, dessen Ventile 30 als Sitzventile ausgeführt sind. Dabei sind die Ventilblöcke 70 derart mit einer Anschlußleitung 72 verbunden, daß die Ventile 30 in Serie geschaltet sind. An die Ventile 30 sind elektromagnetische Proportionalsteuerungen 31 angebracht, um kontrolliert öffnen und schließen zu können. Das Ventil 30 zusammen mit der Proportionalsteuerung 31 ist als vorgefertigte Ventileinheit (Cartridge) erhältich. Diese Cartridge braucht dann nur noch in die entsprechende Ventilaufnahme 34 eingesteckt zu werden.In the first embodiment according to FIG. 3 , a valve block 70 is attached to both the right valve side 10 and the left valve side 6 , the valves 30 of which are designed as seat valves. The valve blocks 70 are connected to a connecting line 72 such that the valves 30 are connected in series. Electromagnetic proportional controls 31 are attached to the valves 30 in order to be able to open and close in a controlled manner. The valve 30 together with the proportional control 31 is available as a prefabricated valve unit (cartridge). This cartridge then only needs to be inserted into the corresponding valve receptacle 34 .

Ein mit einem derartige Wegeventil versehener Steuerblock kommt ohne ein Pilotventil aus und wird vornehmlich bei Maschineneinrichtungen mit hängenden Lasten eingesetzt, die sehr dicht sein müssen. Solche Maschineneinrichtungen sind beispielsweise Krane, Pressen oder Feuerwehrleitern. A control block provided with such a directional valve comes without one Pilot valve and is mainly used in machine equipment hanging loads that must be very tight. Such machine facilities are, for example, cranes, presses or fire ladders.

In der in Figur 4 dargestellten Ausführungsform sind am Mittelblock 2 zwei Ventilblöcke 50 angebracht, deren Ventile 33 eine Parallelschaltung aufweisen. In dieser Ausführungsform ist an der Pilotventilseite 8 des Mittelblocks 2 ein Pilotventil 32 angeschlossen, welches über die Steuerleitungen 14 die einzelnen, in den Ventilblöcken 50 angebrachten Ventile 33 steuert. An den Rückseiten der Ventile 33 sind hydrostatisch gesteuerte Rückschlagventile 35 angebracht, so daß jede in den Ventilaufnahmen 34, 36 angebrachte Ventileinheit (Cartridge) aus dem Ventil 33 und dem Rückschlagventil 35 besteht und in der Basisfunktion ein 2/2 Wege Ventil eines Logikelementes bildet.In the embodiment shown in FIG. 4 , two valve blocks 50 are attached to the middle block 2 , the valves 33 of which have a parallel connection. In this embodiment, a pilot valve 32 is connected to the pilot valve side 8 of the middle block 2 and controls the individual valves 33 mounted in the valve blocks 50 via the control lines 14 . On the back of the valves 33 , hydrostatically controlled check valves 35 are attached, so that each valve unit (cartridge) fitted in the valve receptacles 34, 36 consists of the valve 33 and the check valve 35 and forms a 2/2-way valve of a logic element in the basic function.

Ein Wegeventil gemäß Fig. 4 wird ebenfalls bei Maschinen mit hängenden Lasten eingesetzt, ist jedoch nicht absolut dicht, so daß es vorwiegend zur Steuerung von rotatorischen Antrieben (hydrostatischer Motor) und translatorischen Antrieben (hydrostatischer Zylinder) jeweils mit Haltefunktion eingesetzt wird. 4 is also used in machines with hanging loads, but is not absolutely tight, so that it is mainly used to control rotary drives (hydrostatic motor) and translational drives (hydrostatic cylinders) each with a holding function.

Die beiden in Figur 3 und Figur 4 dargestellten Ausführungsformen haben lediglich beispielhaften Charakter. Vielmehr ist es durchaus möglich, beliebige Ventile und Ventilblöcke in beliebigen Kombinationen am Mittelblock 2 anzubringen. Dies schließt auch das Pilotventil 32 ein. Dabei ist es auch möglich, zwei verschiedene Ventilblöcke am Mittelblock 2 anzubringen.The two embodiments shown in FIG. 3 and FIG. 4 are merely exemplary. Rather, it is entirely possible to attach any valves and valve blocks in any combination to the middle block 2 . This also includes the pilot valve 32 . It is also possible to attach two different valve blocks to the middle block 2 .

In den Figuren 5 bis 12 sind verschiedene Ventilblöcke 50, 60, 70, 80, 90, 100, 110, 120 dargestellt, die alle mit dem Mittelblock 2 kompatibel sind. Alle Ventilblöcke 50, 60, 70, 80, 90, 100, 110, 120 besitzen zwei Ventilaufnahmen 34, 36, in die ein Ventil einsteckbar ist. Diese Technik ist als Cartridge-Technik hinlänglich bekannt. Die Steuerleitungen x, y sind hier nicht dargestellt, um die Abbildung übersichtlicher zu gestalten.Various valve blocks 50, 60, 70, 80, 90, 100, 110, 120 are shown in FIGS. 5 to 12 , all of which are compatible with the middle block 2 . All valve blocks 50, 60, 70, 80, 90, 100, 110, 120 have two valve seats 34, 36 into which a valve can be inserted. This technique is well known as a cartridge technique. The control lines x, y are not shown here in order to make the illustration clearer.

Darüber hinaus weist jeder Ventilblock 50, 60, 70, 80, 90, 100, 110, 120 nicht dargestellte Befestigungsvorrichtungen zur Aufnahme weiterer Ventile, elektromagnetischer Proportionalsteuerungen, Wegnehmer, Vorsteuereinrichtungen oder dergleichen auf.In addition, each valve block 50, 60, 70, 80, 90, 100, 110, 120 has fastening devices, not shown, for receiving further valves, electromagnetic proportional controls, pickups, pilot control devices or the like.

Die Ventilaufnahmen 34, 36 sind achsparallel angeordnet und befinden sich in einer senkrecht zur Mittelblockschnittstelle 38 angeordneten Ventilebene 40.The valve seats 34, 36 are arranged axially parallel and are located in a valve plane 40 arranged perpendicular to the center block interface 38 .

Die Ventilblöcke 50, 60, 70, 80, 90, 100 weisen zumindest eine Pump- 42' und eine Tankanschlußleitung 42 auf, die einen durch das Ventil 30, 33 und die Ventilaufnahme 34, 36 gebildeten Ventilraum 44 mit der Tank- (T) oder Pumpleitung (P) verbindet. Diese Pump- und Anschlußleitung 42, 42' ist nicht in der Ventilebene 40 angesiedelt, sondern führt von der Ventilebene 40 in eine dem hinteren Abschnitt 20 entsprechende Ebene. Die Ventilebene 40 entspricht dabei dem vorderen Abschnitt 16.The valve blocks 50, 60, 70, 80, 90, 100 have at least one pump 42 ' and one tank connection line 42 , which have a valve space 44 formed by the valve 30, 33 and the valve receptacle 34, 36 with the tank ( T ) or pump line ( P ) connects. This pump and connection line 42, 42 ' is not located in the valve level 40 , but leads from the valve level 40 to a level corresponding to the rear section 20 . The valve level 40 corresponds to the front section 16 .

Die Ventilblöcke 110 und 120 weisen je eine Pump- und eine Tankanschlußleitung 42, 42' auf, die die Ventilspitze mit der Tank- (T) oder Pumpleitung (P) verbindet.The valve blocks 110 and 120 each have a pump and a tank connection line 42, 42 ' , which connects the valve tip to the tank ( T ) or pump line ( P ).

Der in Figur 5 dargestellte Ventilblock 40 weist eine Parallelschaltung der Ventileinheiten auf, wobei die von der Ventilaufnahme 34, 36 zur Mittelblockschnittstelle 38 führenden Arbeitsleitungen 52, 54 innerhalb der Ventilebene 40 angesiedelt sind.The valve block 40 shown in FIG. 5 has a parallel connection of the valve units, the working lines 52, 54 leading from the valve receptacle 34, 36 to the middle block interface 38 being located within the valve level 40 .

Bei dem in Figur 6 dargestellten Ventilblock 60 sind die Ventileinheiten parallel verbunden geschaltet. Dieser Ventilblock 60 entspricht dem in Figur 5 dargestellten Ventilblock 50, weist jedoch zusätzlich einen Anschlußleitung 62 vom Ausgang der Ventilaufnahme 34 in den Ventilraum 46 der Ventilaufnahme 36 auf.In the valve block 60 shown in FIG. 6 , the valve units are connected in parallel. This valve block 60 corresponds to the valve block 50 shown in FIG. 5 , but additionally has a connecting line 62 from the outlet of the valve receptacle 34 into the valve chamber 46 of the valve receptacle 36 .

Der in Figur 7 dargestellte Ventilblock 70 entspricht dem in Figur 6 abgebildeten Ventilblock 60, außer daß der Ventilblock 70 keine Verbindung von der Ventilaufnahme 34 zur Arbeitsleitung A bzw. B aufweist. The valve block 70 shown in FIG. 7 corresponds to the valve block 60 shown in FIG. 6 , except that the valve block 70 has no connection from the valve receptacle 34 to the working line A or B.

Der in Figur 8 dargestellte Ventilblock 80 entspricht dem in Figur 7 dargestellten Ventilblock 70, jedoch mit spiegelverkehrter Ausgestaltung der Anschlußleitungen 82 und 84.The valve block 80 shown in FIG. 8 corresponds to the valve block 70 shown in FIG. 7 , but with a mirror-inverted design of the connecting lines 82 and 84 .

Bei dem in Figur 9 dargestellten Ventilblock 90 sind die Ventileinheiten ebenso wie in den Ventilblöcken 70 und 80 in Reihe geschaltet, jedoch erfolgt die Ansteuerung in dem Ventilblock 90 in einer Ventileinheit invers. Hierbei sind die Ausgänge der Ventilaufnahmen 34 und 36 durch eine Arbeitsleitung 92 verbunden, ohne daß eine Verbindung zu einer Arbeitsleitung A bzw. B existiert.In the valve block 90 shown in FIG. 9 , the valve units are connected in series as in the valve blocks 70 and 80 , but the control in the valve block 90 takes place inversely in a valve unit. Here, the outputs of the valve receptacles 34 and 36 are connected by a working line 92 without a connection to a working line A or B.

Der in Fig. 10 dargestellte Ventilblock 100 weist zwei parallel geschaltete Ventilaufnahmen 34, 36 auf, die durch eine Verbindungsleitung 102 miteinander verbunden sind.The valve block 100 shown in FIG. 10 has two valve receptacles 34, 36 connected in parallel, which are connected to one another by a connecting line 102 .

Der in Figur 11 dargestellte Ventilblock 110 entspricht dem in Figur 7 dargestellten Ventilblock 70, jedoch führt die Pump- und die Tankleitung 42, 42' zur Spitze des Ventils und nicht zum Ventilraum.The valve block 110 shown in FIG. 11 corresponds to the valve block 70 shown in FIG. 7 , but the pump and tank lines 42 , 42 'lead to the tip of the valve and not to the valve chamber.

Der in Figur 12 dargestellte Ventilblock 120 entspricht dem in Figur 10 dargestellten Ventilblock 100, jedoch führt die Pump/Tankleitung 42' zur Spitze des Ventils und nicht zum Ventilraum.The valve block 120 shown in FIG. 12 corresponds to the valve block 100 shown in FIG. 10 , but the pump / tank line 42 ′ leads to the tip of the valve and not to the valve chamber.

Alle in den Figuren 5 bis 12 abgebildeten Ventilblöcke 50 bis 120 können an die Ventilblockstelle 22, 24 des Mittelblocks 2 angeschlossen werden. Dabei wird die gerade nicht benötigte Leitung derart abgedichtet, daß die Funktionsweise des hydraulischen Wegeventils als Ganzes nicht beeinträchtigt wird und daß aus dem entsprechenden Anschluß kein Hydrauliköl herausleckt. Dieses Abdichten erfolgt beispielsweise mit einem nicht dargestellten Stopfen, Verschluß oder dergleichen.All valve blocks 50 to 120 shown in FIGS. 5 to 12 can be connected to the valve block location 22, 24 of the middle block 2 . The line that is not required is sealed in such a way that the functioning of the hydraulic directional control valve as a whole is not impaired and that no hydraulic oil leaks out of the corresponding connection. This sealing takes place, for example, with a plug, closure or the like, not shown.

Alle Ventilblöcke 50 bis 120 sind auch mit Steuerleitungen (x, y) 14 ausgestattet, wie dies beispielhaft in den Figuren 2 und 4 dargestellt ist. In den anderen Figuren sind die Steuerleitungen nicht dargestellt, um die Figur übersichtlicher zu gestalten.All valve blocks 50 to 120 are also equipped with control lines (x, y) 14 , as is shown by way of example in FIGS. 2 and 4 . The control lines are not shown in the other figures in order to make the figure clearer.

Wie bereits oben ausgeführt wurde, kann durch Kombination des Mittelblocks 2 mit einem oder zwei Ventilblöcken 50 bis 120 und geeigneten, in die Ventilaufnahme 34, 36 eingebauten Ventileinheiten jede beliebige hydraulische Schaltung erzeugt werden. Hierdurch wird das hydraulische Wegeventil in Modulbauweise kostengünstig herstellbar und es besteht die Möglichkeit, die vorhandene hydraulische Schaltung zu einem beliebigen Zeitpunkt durch eine andere hydraulische Schaltung zu ersetzen, indem man einzelne Ventile und/oder einzelne Ventilblöcke durch andere ersetzt.As already stated above, any hydraulic circuit can be generated by combining the middle block 2 with one or two valve blocks 50 to 120 and suitable valve units installed in the valve receptacle 34, 36 . As a result, the hydraulic directional control valve can be produced inexpensively in a modular design and there is the possibility of replacing the existing hydraulic circuit at any time with another hydraulic circuit by replacing individual valves and / or individual valve blocks with others.

In den Fig. 13 und 14 ist ein hydraulischer Steuerblock mit lediglich zwei Ventileinheiten dargestellt. Wie Fig. 13 zu entnehmen ist, umfaßt dieser Steuerblock einen Ventilblock 70 gemäß Fig. 7, an dem zwei Ventileinheiten mit je einem Vetnil 30 und einem Rückschlagventil 35 angebracht sind. Der Ventilblock 70 ist an einer Anschlußplatte 130 befestigt, an der auch die hydraulischen Leitungen P, T, A, x und y angeschlossen sind. 13 and 14 , a hydraulic control block with only two valve units is shown. As can be seen in FIG. 13 , this control block comprises a valve block 70 according to FIG. 7, to which two valve units, each with a valve 30 and a check valve 35, are attached. The valve block 70 is attached to a connection plate 130 , to which the hydraulic lines P, T, A, x and y are also connected.

Ein derartiger "kleiner" Steuerblock mit nur zwei Ventileinheiten findet in hydraulischen Anlagen vielfache Verwendung. In anderen, nicht dargestellten Ausführungsformen können auch andere Ventilblöcke 50, 60, 70, 80, 90, 100, 110, 120 eingesetzt werden, um einen kleinen Steuerblock zu schaffen. Die Auswahl des gewünschten Ventilblockes hängt lediglich von den im einzelnen Anwendungsfall erforderlichen Schaltbedingungen, da alle Ventilblöcke gemäß einem der Fig. 5 bis 12 kompatibel mit der Anschlußplatte 130 ausgebildet sind.Such a "small" control block with only two valve units is widely used in hydraulic systems. In other embodiments, not shown, other valve blocks 50, 60, 70, 80, 90, 100, 110, 120 can also be used to create a small control block. The selection of the desired valve block depends only on the switching conditions required in the individual application, since all valve blocks according to one of FIGS. 5 to 12 are designed to be compatible with the connection plate 130 .

Bei allen Ventilblöcken führt die Pumpleitung 42' zur zweiten Ventilaufnahme 36, während die Tankleitung 42 mit der ersten Ventilaufnahme 34 verbunden ist. Hinzu kommt, daß die in den Figuren 6 bis 12 dargestellten Ausführungsformen die Ventilaufnahmen 34, 36 über Anschlußleitungen 52, 54, 62, 72, 84, 92, 102, 112, 122 direkt miteinander verbunden sind. In der Ausführungsform gemäß Figur 5 hingegen, sind die Ventilaufnahmen 34, 36 über die Arbeitsleitung A oder B miteinander verbunden.In all valve blocks, the pump line 42 ′ leads to the second valve receptacle 36 , while the tank line 42 is connected to the first valve receptacle 34 . In addition, the embodiments shown in FIGS. 6 to 12 connect the valve receptacles 34, 36 directly to one another via connecting lines 52, 54, 62, 72, 84, 92, 102, 112, 122 . In contrast, in the embodiment according to FIG. 5 , the valve receptacles 34, 36 are connected to one another via the working line A or B.

In nicht dargestellten Ausführungsformen sind nachträglich Ergänzungsleitungen in den Ventilblock 60, 70, 80, 90, 100, 110, 120 eingebohrt, die die jeweilige Anschlußleitung 52, 54, 62, 72, 84, 92, 102, 112, 122 oder die Ventilaufnahme 34, 36 mit der Arbeitsleitung A oder B verbinden.In embodiments that are not shown, supplementary lines are subsequently drilled into the valve block 60, 70, 80, 90, 100, 110, 120 , which the respective connection line 52, 54, 62, 72, 84, 92, 102, 112, 122 or the valve receptacle 34 , 36 connect to work line A or B.

Wie den Figuren zu entnehmen ist, sind die Hydraulikleitungen im Mittelblock und in den Ventilblöcken so ausgelegt, daß bei Umkehrung der Strömungsrichtung auch die Ventile umgekehrt durchströmt werden, so daß bei vorhandenen Blöcken unter Umständen nur durch geändertes Schalten der Ventile eine neue hydraulische Schaltung für eine neue Anwendung entsteht.As can be seen from the figures, the hydraulic lines are in the middle block and in the valve blocks designed so that when the flow direction is reversed flow through the valves in reverse, so that at existing blocks may only be changed by switching the Valves a new hydraulic circuit for a new application emerges.

In einer nicht dargestellten Ausführungsform sind im Zentralblock neben den Steuerleitungen x und y auch noch Steuerleitungen z1 und z2 vorgesehen. Letztere dienen der hydraulischen Verbindung der Ventile mit externen Vorrichtungen.In an embodiment not shown, control lines z 1 and z 2 are also provided in the central block in addition to the control lines x and y . The latter serve to hydraulically connect the valves to external devices.

In einer anderen nicht dargestellten Ausführungsform sind im Mittelblock und in den Ventilblöcken eine oder mehrere hydraulische Leitungen als Blindtaschen ausgebildet, d. h. die entsprechende hydraulische Leitung ist nicht als Durchgangsleitung ausgebildet, sondern sie ist einseitig verschlossen. Dabei werden die Pump-, die Tank-, die Arbeits- und die Steuerleitungen ausgehend von der Anschlußschnittstelle durch den gesamten verlegt, enden jedoch kurz vor jeweiligen Austrittsstelle, so daß eine dünne Wand verbleibt, die stark genug ist, dem Betriebsdruck standzuhalten. Somit ensteht beispielsweise ein Mittelblock, der für jede beliebige Schaltung einsetzbar ist, denn erst wenn feststeht, welche Leitung zum Einsatz kommt, wird diese geöffnet, insbesondere aufgebohrt. In another embodiment, not shown, in the middle block and in the valve blocks one or more hydraulic lines as Blind pockets designed, d. H. the corresponding hydraulic line is not a through line, but one-sided locked. The pump, the tank, the working and the Control lines starting from the connection interface through the whole misplaced, but end shortly before each exit point, so that a thin Wall remains that is strong enough to withstand the operating pressure. Consequently For example, a middle block is created for any circuit can be used, because only when it is certain which cable is used, it is opened, in particular drilled out.

BezugszeichenlisteReference list

22nd
MittelblockMiddle block
44th
AnschlußseiteConnection side
66
linke Ventilseiteleft valve side
88th
PilotventilseitePilot valve side
1010th
rechte Ventilseiteright valve side
1212th
AnschlußschnittstelleConnection interface
1313
PilotventilschnittstellePilot valve interface
1414
SteuerleitungControl line
1616
vorderer Abschnittfront section
2020th
hinterer Abschnittrear section
2222
VentilblockschnittstelleValve block interface
2424th
VentilblockschnittstelleValve block interface
2525th
SegmenteSegments
2626
BohrbildDrilling pattern
2828
BohrbildDrilling pattern
3030th
VentilValve
3131
elektromagn. Proportionalsteuerungelectromagnetic Proportional control
3232
PilotventilPilot valve
3333
VentilValve
3434
VentilaufnahmeValve seat
3535
Rückschlagventilcheck valve
3636
VentilaufnahmeValve seat
3838
MittelblockschnittstelleMid-block interface
4040
VentilebeneValve level
4242
Pump/TankanschlußleitungPump / tank connection line
42'42 '
Pump/TankanschlußleitungPump / tank connection line
4444
VentilraumValve space
4646
VentilraumValve space
5050
VentilblockValve block
5252
AnschlußleitungConnecting cable
5454
AnschlußleitungConnecting cable
6060
VentilblockValve block
6262
AnschlußleitungConnecting cable
7070
VentilblockValve block
7272
AnschlußleitungConnecting cable
8080
VentilblockValve block
8282
AnschlußleitungConnecting cable
8484
AnschlußleitungConnecting cable
9090
VentilblockValve block
9292
AnschlußleitungConnecting cable
100100
VentilblockValve block
102102
VerbindungsleitungConnecting line
110110
VentilblockValve block
112112
VerbindungsleitungConnecting line
120120
VentilblockValve block
122122
VerbindungsleitungConnecting line
130130
AnschlußplatteConnection plate
PP
PumpleitungPump line
TT
TankleitungTank line
AA
ArbeitsleitungWork management
BB
ArbeitsleitungWork management
C1-C4 C 1 -C 4
VentileinheitValve unit

Claims (16)

  1. Central block of a pilot controlled valve system with seat and/or piston valves having a preferably standardised connection interface (12) as well as a pilot valve interface (13) for receiving a pilot valve (32) and being equipped with a pump conduit (P), a tank conduit (T), a first work conduit (A), a second work conduit (B), a first control conduit x and a second control conduit y and in which four valve reception cavities (34, 34') for receiving one valve unit (C1, C2, C3, C4) each are provided,
    characterized in that
    the central block is composed of a middle block (2) to which are detachably secured two valve blocks (50, 60, 70, 80, 90, 100, 110, 120), the middle block (2) having two valve sides (6, 10) provided each with a valve block interface (22, 24) for the reception of one valve block (50, 60, 70, 80, 90, 100, 110, 120) each, whereas each valve block (50, 60, 70, 80, 90, 100, 110, 120) has two valve reception cavities (34, 34') and the control conduits x and y are arranged in such a way that each valve unit (C1, C2, C3, C4) may be driven by a pilot valve (32) mountable onto the pilot valve interface (13).
  2. Central block according to claim 1,
    characterized in that
    the valve units (C1, C2, C3, C4) are connected via the hydraulic conduits in such a way that by inverting the direction of the flow in the hydraulic conduits, the flow direction in the valve units (C1, C2, C3, C4) is also inverted.
  3. Central block according to at least one of the above mentioned claims,
    characterized in that
    the valve units (C1, C2, C3, C4) are diagonally drivable.
  4. Central block according to at least one of the above mentioned claims,
    characterized in that
    the pump conduit (P) and the tank conduit (T) are located in a rear section (20) and that the first (A) and second work conduit (B) are located in a front section (16) of the middle block (2).
  5. Central block according to claim 4,
    characterized in that
    the pump conduit (P), the tank conduit (T) and/or the work conduits (A, B) are exclusively running partly perpendicular and partly parallel to the connecting side (4) of the middle block (2).
  6. Central block according to one of the above mentioned claims,
    characterized in that
    the middle block (2) has a connecting side (4) provided with a connection interface (12) hydraulically connected by means of the pump conduit (P) and the tank conduit (T) with each valve side (6, 10) and that the connection interface (12) is hydraulically connected via the first work conduit (A) with a first valve side (6) and via the second work conduit (B) with the other valve side (10).
  7. Central block according to at least one of the above mentioned claims,
    characterized in that
    the valve block interfaces (22, 24) have identical bore schemes (26, 28).
  8. Central block according to at least one of the above mentioned claims,
    characterized in that
    the valve block interfaces (22, 24) have point symmetrical bore schemes.
  9. Central block according to at least one of the above mentioned claims,
    characterized in that
    the pump conduit (P), the tank conduit (T), the first work conduit (A), the second work conduit (B), the first: control conduit x and/or the second control conduit y are designed as blind pockets.
  10. Valve block for a two or three port control valve with pilot controlled seat and/or piston valves, particularly for a central block according to one of the above mentioned claims, with a first (34) and a second valve reception cavity (36) for receiving one valve unit (C1, C2) each, which is interspersed with a pump conduit (42'), a tank conduit (42), a first control conduit x and a second control conduit y,
    characterized in that
    exactly one tank conduit (42) and one pump conduit (42') is provided in the valve block (50, 60, 70, 80, 90, 100, 110, 120), whereas the tank conduit (42') leads to the first valve reception cavity (34) and the pump conduit (42') to the second valve reception cavity (36).
  11. Valve block according to claim 10,
    characterized in that
    the valve units (C1, C2) are connected via the hydraulic conduits in such a way that by inverting the direction of the flow in the hydraulic conduits, the flow runnning through the valve units (C1, C2) is also inverted.
  12. Valve block according to at least one of the claims 10 to 11,
    characterized in that
    the valve reception cavities (34, 36) are connected to each other via connecting and link conduits (52, 54, 62, 72, 84, 92, 102, 112, 122) either directly or via a work conduit A or B.
  13. Valve block according to at least one of the claims 10 to 12,
    characterized in that
    the connecting and link conduits (62, 72, 84, 92, 102, 112, 122) are connectable with the required work conduit via supplementary conduits, whereas the supplementary conduits are subsequently arrangeable onto the valve block (60, 70, 80, 90, 100, 110, 120).
  14. Valve block according to at least one of the claims 10 to 13,
    characterized by
    a bore scheme, in which all connections are aligned.
  15. Valve block according to at least one of the claims 10 to 14,
    characterized in that
    the pump conduit. (P), the tank conduit (T), the first control conduit x and/or the second control conduit y are designed as blind pockets.
  16. Use of a valve block (50, 60, 70, 80, 90, 100, 110, 120) with valve units (C1, C2) according to at least one of the above mentioned claims as a two or three port control valve.
EP96945481A 1995-10-09 1996-10-03 Valve system Expired - Lifetime EP0854982B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19537482 1995-10-09
DE19537482A DE19537482A1 (en) 1995-10-09 1995-10-09 Hydraulic control block
PCT/DE1996/001909 WO1997013980A2 (en) 1995-10-09 1996-10-03 Valve system

Publications (2)

Publication Number Publication Date
EP0854982A2 EP0854982A2 (en) 1998-07-29
EP0854982B1 true EP0854982B1 (en) 2001-12-19

Family

ID=7774340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96945481A Expired - Lifetime EP0854982B1 (en) 1995-10-09 1996-10-03 Valve system

Country Status (11)

Country Link
US (1) US5975134A (en)
EP (1) EP0854982B1 (en)
JP (1) JPH11509303A (en)
CN (1) CN1092296C (en)
CA (1) CA2218727C (en)
CZ (1) CZ297720B6 (en)
DE (2) DE19537482A1 (en)
DK (1) DK0854982T3 (en)
ES (1) ES2169277T3 (en)
SK (1) SK284489B6 (en)
WO (1) WO1997013980A2 (en)

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Also Published As

Publication number Publication date
DK0854982T3 (en) 2002-03-25
CN1092296C (en) 2002-10-09
EP0854982A2 (en) 1998-07-29
WO1997013980A2 (en) 1997-04-17
WO1997013980A3 (en) 1997-07-03
SK284489B6 (en) 2005-04-01
ES2169277T3 (en) 2002-07-01
CA2218727A1 (en) 1997-04-17
DE59608520D1 (en) 2002-01-31
CZ73698A3 (en) 2000-02-16
JPH11509303A (en) 1999-08-17
SK33598A3 (en) 1998-07-08
CA2218727C (en) 2002-04-02
CN1199449A (en) 1998-11-18
DE19537482A1 (en) 1997-04-10
CZ297720B6 (en) 2007-03-14
US5975134A (en) 1999-11-02

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