EP0921321A1 - Soupape d'arrêt du type soupape à siège - Google Patents

Soupape d'arrêt du type soupape à siège Download PDF

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Publication number
EP0921321A1
EP0921321A1 EP98121628A EP98121628A EP0921321A1 EP 0921321 A1 EP0921321 A1 EP 0921321A1 EP 98121628 A EP98121628 A EP 98121628A EP 98121628 A EP98121628 A EP 98121628A EP 0921321 A1 EP0921321 A1 EP 0921321A1
Authority
EP
European Patent Office
Prior art keywords
valve
valve body
check valve
pressure medium
seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98121628A
Other languages
German (de)
English (en)
Inventor
Christian Rioufreyt
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0921321A1 publication Critical patent/EP0921321A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • F15B13/015—Locking-valves or other detent i.e. load-holding devices using an enclosed pilot flow valve

Definitions

  • the invention is based on a hydraulic check valve in seat valve design according to the preamble of claim 1 as it has become known for example from DT-AS 1 293 034.
  • the known check valve has a sleeve-shaped first Valve member, in the interior of which a second Valve member forming valve ball is arranged.
  • the Valve ball is loaded by the spring force of a spring, which is supported on a depth-adjustable throttle pin.
  • the valve ball is by means of an unlocking piston Valve seat can be lifted off to ensure a return flow of pressure medium from the To enable consumers.
  • To limit the The valve ball stroke is in the housing of the shut-off valve circumferential shoulder trained as a stop for the Unlocking piston works.
  • the hydraulic check valve in seat valve type with the characteristic features of claim 1 has in contrast the advantage that it is simplified by a Housing design simpler and therefore cheaper can be produced. Furthermore, the depth adjustable Actuator for influencing the flow rate on the second Valve member simultaneously as a stroke stop for the second Valve member designed so that with one and the same Valve housing different strokes for the unlocking piston let achieve.
  • the flow properties of the pressure medium can be also by simple cross holes on the two Also influence valve elements.
  • FIG. 1 shows a block diagram of a Hydraulic system
  • Figure 2 is a check valve in one Longitudinal section
  • FIG. 6 one compared to FIG. 2 modified arrangement in longitudinal section.
  • the unlockable check valve 10 in Seat valve type is part of one in FIG. 1 Hydraulic system shown to control a Tool A is used. Tool A should for example, move a load L.
  • To control the required pressure medium flow is a known 4/2-way valve 1 with a pressure medium source P and one Pressure medium tank T connected. From the 4/2 way valve 1 goes a first line 2, which the one side of a piston 3rd of tool A is pressurized. The other side of the piston 3 is via a second line 4 connected to the 4/2-way valve 1, in the second Line 4, the check valve 10 is interposed.
  • a third line 5 branches off from the first line 2, which leads to an end face of the check valve 10.
  • the unlockable shown in Figure 2 closer Check valve 10 has a substantially cup-shaped Base body 11.
  • In the bottom of the base body 11 is one Inlet bore 12 formed in which the third line 5th sealing opens.
  • the first, the inlet bore 12 facing section 14 has the smallest diameter of the three sections 14, 15, 16, the inlet bore 12 opens into the edge region of the first section 14.
  • an unlocking piston 18 slidably guided.
  • the second and third close Section 15 and 16 both roughly the same Have diameter.
  • the two sections 15 and 16 are by a collar 20 running around the inside wall of the housing separated from each other.
  • first bore 21 in which the second line 4 opens, which with the 4/2-way valve 1 connected is.
  • the first bore 21 has a diameter on, which corresponds to the height of the second section 15.
  • second bore 22 formed over the second Line 4 is connected to the implement A. The The arrangement of the second bore 22 is such that this connects directly above the collar 20.
  • a plug 25 screwed in the open end of the base body 11 in the third section 16 .
  • a sealing ring is used for the inner wall of the base body 11 26, which in a circumferential annular groove 27 of the plug 25th is inserted.
  • the plug 25 faces the third Section 16 facing a side concentric to the Housing longitudinal axis formed recess 28 on the Inner wall a substantially sleeve-shaped first Valve member 30 is slidably guided.
  • a first spring 32 is arranged, which first valve member 30 presses in the direction of the collar 20.
  • the first valve member 30 is on the collar 20 facing Side expanded in its outer diameter and points there a sloping first sealing surface 33, which with a corresponding second formed on the federal government 20 Sealing surface 34 cooperates, and together a first Form sealing seat 35.
  • the first valve member has above the first sealing surface 33 30 a continuous transverse bore 36 for the pressure medium, whose diameter is approximately the diameter of the first and the corresponds to the second bore 21 and 22, and if the two sealing surfaces 33, 34 the first sealing seat 35 form, arranged approximately at the level of the second bore 22 is.
  • the second valve member 38 Is on the inner wall of the first valve member 30 concentric to the first valve member 30 a second Valve member 38 slidably guided.
  • the second valve member 38 has a sleeve-shaped first facing the stopper 25 Section 39, as well as a facing away from the plug 25, in approximately tappet-shaped second section 41.
  • In the amount of Transition from the first section 39 to the second section 41 are two at right angles to each other in the first section 39 arranged, continuous throttle bores 42, 43 for the Pressure medium trained.
  • the second valve member 38 penetrates with the second Section 41 the first valve member 30 at the level of the first Sealing seat 35.
  • the first valve member 30 has one Breakthrough with an approximately parallel to the first sealing surface 33 formed third sealing surface 44 which in one the unlocking piston 18 facing first cylindrical Section 45 merges.
  • the third sealing surface 44 of the first Valve member 30 acts with a fourth sealing surface 46 together at the second section 41 of the second Valve member 38 on the first section 41 facing Side is formed.
  • the third and fourth sealing surfaces 44 and 46 together form a second sealing seat 47.
  • Below the fourth sealing surface 46 is in the area second cylindrical portion 48 an annular groove educated.
  • the annular groove receives a sealing ring 51 which when the second valve member 38 is lowered in the region of the first cylindrical portion 45 of the first valve member 30 is arranged.
  • the second cylindrical portion 48 of the second Valve member 38 runs on the unlocking piston 18 facing side in a frustoconical area 52 with a flat bottom 53.
  • 52 are four, in uniform Throttle grooves 55 arranged at an angular distance from one another formed in the longitudinal direction of the area 52 extend.
  • the second valve member 38 is one of the spring force second spring 56 in the direction of the second sealing seat 47 acted upon.
  • the second spring 56 which is within the first Section 39 of the second valve member 38 is arranged is supported on the one hand against the top 57 of the second Section 41 and on the other hand against a shoulder 58 one as an actuator for the pressure medium flow nozzle 60 from.
  • the nozzle 60 is in a center in the bottom of the plug 25 formed, continuous recess 61 screw-in depth adjustable.
  • To fix the nozzle 60 in the stopper 25 serves an externally accessible nut 62.
  • a cylindrical, pin-shaped section 63 of the nozzle 60 protrudes into the recess 28 of the plug 25 and serves as a guide for the second spring 56.
  • the second Section 41 of the second valve member 38 facing plane Bottom 64 of the pin-shaped section 63 is used still as a stroke limitation or stop for the second Valve member 38 according to the screw-in depth of the nozzle 60.
  • the control device 68 shown in FIG. 6 comprises two unlockable check valves 10a and is between a usual 4/3-way valve 69 and a hydraulic double-acting motor 70 switched.
  • Regarding the basic structure and mode of operation of a such control device is based on DE-GM 93 03 988 referred.
  • Housing 71 in each of its opposite end faces each a plug 25a with a first described above and second valve members 30a and 38a. Between is a double-acting unlocking piston 18a sliding guided.
  • the pressure medium flows can also be passed through here the setting of the nozzle 60a in a simple manner influence. They can also be different Screw-in depths of the sockets 60a of different sizes Generate pressure medium flows in different directions.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Check Valves (AREA)
  • Fluid-Pressure Circuits (AREA)
EP98121628A 1997-12-06 1998-11-12 Soupape d'arrêt du type soupape à siège Withdrawn EP0921321A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997154242 DE19754242A1 (de) 1997-12-06 1997-12-06 Hydraulisches Sperrventil in Sitzventilbauart
DE19754242 1997-12-06

Publications (1)

Publication Number Publication Date
EP0921321A1 true EP0921321A1 (fr) 1999-06-09

Family

ID=7851014

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121628A Withdrawn EP0921321A1 (fr) 1997-12-06 1998-11-12 Soupape d'arrêt du type soupape à siège

Country Status (2)

Country Link
EP (1) EP0921321A1 (fr)
DE (1) DE19754242A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2909745A1 (fr) * 2006-12-12 2008-06-13 Renault Sas Vanne de commande d'un actionneur hydromecanique adaptee a limiter le reflux d'un fluide de commande
AT522793B1 (de) * 2019-10-08 2021-02-15 Avl List Gmbh Kompakter hydraulischer Ventilmechanismus für eine längenverstellbare Pleuelstange

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013014673A1 (de) 2013-09-04 2015-03-05 Hydac Fluidtechnik Gmbh Lasthalteventil
DE102021109704B4 (de) 2021-04-16 2023-06-22 Weber-Hydraulik Gmbh Entsperrbares Rückschlagventil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1293034B (de) * 1965-12-03 1969-04-17 Delmag Maschinenfabrik Drosselrueckschlagventil fuer hydraulische Arbeitsgeraete
DE1929482A1 (de) * 1968-06-12 1970-01-02 Mcconnel F W Ltd Sperrventilanordnung fuer hydraulische Steueranlagen
DE2211404A1 (de) * 1972-03-09 1973-09-13 Rexroth Gmbh G L Entsperrbares rueckschlagventil
EP0051728A1 (fr) * 1980-11-08 1982-05-19 Robert Bosch Gmbh Dispositif de commande pour un vérin hydraulique
DE3048746A1 (de) * 1980-12-23 1982-07-22 Robert Bosch Gmbh, 7000 Stuttgart Hydraulikanlage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1293034B (de) * 1965-12-03 1969-04-17 Delmag Maschinenfabrik Drosselrueckschlagventil fuer hydraulische Arbeitsgeraete
DE1929482A1 (de) * 1968-06-12 1970-01-02 Mcconnel F W Ltd Sperrventilanordnung fuer hydraulische Steueranlagen
DE2211404A1 (de) * 1972-03-09 1973-09-13 Rexroth Gmbh G L Entsperrbares rueckschlagventil
EP0051728A1 (fr) * 1980-11-08 1982-05-19 Robert Bosch Gmbh Dispositif de commande pour un vérin hydraulique
DE3048746A1 (de) * 1980-12-23 1982-07-22 Robert Bosch Gmbh, 7000 Stuttgart Hydraulikanlage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2909745A1 (fr) * 2006-12-12 2008-06-13 Renault Sas Vanne de commande d'un actionneur hydromecanique adaptee a limiter le reflux d'un fluide de commande
AT522793B1 (de) * 2019-10-08 2021-02-15 Avl List Gmbh Kompakter hydraulischer Ventilmechanismus für eine längenverstellbare Pleuelstange
AT522793A4 (de) * 2019-10-08 2021-02-15 Avl List Gmbh Kompakter hydraulischer Ventilmechanismus für eine längenverstellbare Pleuelstange

Also Published As

Publication number Publication date
DE19754242A1 (de) 1999-06-10

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