EP1074749B1 - Spannblockkupplung für Druckmittelschaltkreise - Google Patents

Spannblockkupplung für Druckmittelschaltkreise Download PDF

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Publication number
EP1074749B1
EP1074749B1 EP00116843A EP00116843A EP1074749B1 EP 1074749 B1 EP1074749 B1 EP 1074749B1 EP 00116843 A EP00116843 A EP 00116843A EP 00116843 A EP00116843 A EP 00116843A EP 1074749 B1 EP1074749 B1 EP 1074749B1
Authority
EP
European Patent Office
Prior art keywords
opening
coupling
press
valve element
auxiliary
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
EP00116843A
Other languages
English (en)
French (fr)
Other versions
EP1074749A3 (de
EP1074749A2 (de
Inventor
Renato c/o Merlo Spa Galfre
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.)
MERLO PROJECT S.R.L.
Original Assignee
Merlo Project Srl
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Filing date
Publication date
Application filed by Merlo Project Srl filed Critical Merlo Project Srl
Publication of EP1074749A2 publication Critical patent/EP1074749A2/de
Publication of EP1074749A3 publication Critical patent/EP1074749A3/de
Application granted granted Critical
Publication of EP1074749B1 publication Critical patent/EP1074749B1/de
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
    • 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

Definitions

  • the present invention relates to a press-block coupling for fluid circuits.
  • Press-block couplings enable activation or interruption of connection of two branches of a fluid circuit without requiring particular ancillary operations.
  • a press-block coupling is made up of two half-couplings in each of which is mounted a valve element elastically pushed towards a closed position.
  • the respective valve elements are pressed one against the other towards a position of opening of the respective valve seats.
  • the respective valve elements automatically close as a result of the thrust of the springs.
  • a first purpose of the present invention is to provide a press-block coupling that is without cavities and can be cleaned easily.
  • a second purpose of the present invention is to provide a press-block coupling which enables leakage of fluid to be avoided during connection and disconnection manoeuvres.
  • the coupling 10 designates a press-block coupling according to the present invention.
  • the coupling 10 comprises a base body 12 having a plane face 14 designed to rest against a corresponding face of a complementary coupling.
  • the base body 12 has a first opening 16 which is designed to be connected to a branch of a fluid circuit, for example, by means of a hose (not illustrated).
  • the first opening 16 communicates with a cylindrical chamber 18 which ends with a second opening 20.
  • the second opening 20 is designed to establish a fluid connection with a corresponding opening of a complementary coupling.
  • the second opening 20 is surrounded by a first annular seal 22 housed in a groove formed in the plane face 14.
  • a valve seat 24 is formed in the vicinity of the second opening 20.
  • the valve seat 24 is made up of an annular edge adjacent to a cylindrical hole defining the second opening 20.
  • a valve element 26 is mounted in a sliding way inside the chamber 18.
  • the valve element 26 has a plunger portion 28 which engages, with little play, the cylindrical wall of the chamber 18 and divides the chamber into a first section 18a and a second section 18b.
  • the valve element 26 moreover has a closing portion 30 having a surface 32 shaped like the frustum of a cone, which is designed to close the valve seat 24.
  • the base body 12 has a hole 34 for insertion of the valve element 26 into the chamber 18.
  • the hole 34 is sealed by a plug 36.
  • a helical spring 38 in compression is set between the plug 36 and the valve element 26, and produces an elastic force which pushes the surface 32 having the shape of a frustum of a cone against the valve seat 24.
  • the helical spring 38 is partially housed within a blind hole 40 formed in the plunger portion 28 of the valve element 26.
  • In the closed position of the valve element 26 i.e., in the condition where the valve seat 24 is closed by the surface 32 having the shape of a truncated cone) there is a distance h between the valve element 26 and the plug 36. This distance h represents the opening stroke of the valve element 26.
  • a calibrated throat 42 is formed in the closing portion 30 of the valve element 26.
  • the calibrated throat 42 sets the first section 18a of the chamber 18 in fluid connection with a blind duct 44 communicating with the second section 18b.
  • the closing section 30 in the valve element 26 further comprises a non-return valve 46 set in a hole which sets the duct 44 in communication with the first section 18a.
  • the non-return valve 46 enables direct passage of fluid from the second section 18b towards the first section 18a and prevents fluid flow in the opposite direction. From the constructional point of view, the non-return valve 46 consists of a ball, and an elastic ring 50 prevents the ball 46 from coming out of the hole 48.
  • the coupling 10 further comprises an auxiliary chamber 52 communicating with an auxiliary opening 54 formed in the plane face 14.
  • the auxiliary chamber 52 communicates with the section 18b of the main chamber 18 by means of a duct 56.
  • An auxiliary valve element 58 consisting, for example, of a ball is designed to close the auxiliary opening 54. In the closed configuration, the auxiliary valve element 58 protrudes from the plane face 14.
  • a second annular seal 60 surrounds the auxiliary opening 54.
  • a rod 62 is set in a freely sliding way inside the auxiliary chamber 52. The rod 62 and the auxiliary valve element 58 are inserted in the auxiliary chamber 52 through a hole 64 sealed by plug 66.
  • a helical spring 68 in compression is set between the rod 62 and the plug 66, and produces an elastic force which pushes the auxiliary valve element 58 into the closing position of the auxiliary opening 54.
  • the rod 62 is at a distance from the plug 66 by an amount h1 which defines the opening stroke of the auxiliary valve element 58.
  • Figure 2 illustrates a press-block coupling made up of two couplings 18 which are complementary to one another and are coupled together.
  • the second coupling 10 does not have the seals 22, 60 on the plane face 14, but, apart from this difference, is substantially identical to the first coupling, and the elements corresponding to the ones described previously are designated by the same reference numbers.
  • the two complementary couplings are provided with means of reciprocal connection designed to withhold the two plane faces 14 in a mutually facing position.
  • these connection means comprise a screw 70 which extends with play through a through hole 72 formed in the base body 12 of the first coupling and engages a threaded hole 74 formed in the base body 12 of the second coupling.
  • the base body 12 of one or of both the couplings may be provided with a step 76 ( Figure 1) projecting from the plane face 14.
  • the said step constitutes a reference surface set in such a way that the holes 72, 74 of the two complementary couplings are aligned with respect to one another when a corresponding reference surface of the complementary coupling is set up against the step 76.
  • Figure 2 illustrates the condition in which the two couplings 10 are mechanically coupled together by means of the screw 70 and a fluid under pressure is fed to the first opening 16 of one of the two couplings.
  • one of the two couplings is in the condition of Figure 1, with a fluid pressure P1 in the first opening 16.
  • the first opening 16 communicates directly with the first section 18a of the main chamber 18.
  • the non-return valve 46 is closed, and in the second section 18b there is the same pressure P1, given that the section 18b communicates with the section 18a by means of the calibrated throat 42.
  • the auxiliary chamber 52 there is therefore the same pressure P1.
  • the auxiliary valve element 58 is pressed against the auxiliary opening 54 by the pressure of the fluid and by the elastic force of the spring 68.
  • the main valve element 26 is pressed against the valve seat 24 by the pressure P1 and by the elastic force of the spring 38.
  • a coupling 10 having the pressure P1 in its first opening 16 is connected with a complementary coupling 10 having a pressure P2 smaller than P1, in the opening 16.
  • the complementary coupling prior to connection of the joint, is in the condition in which both the auxiliary valve element 58 and the main valve element 26 are closed.
  • the auxiliary valve elements 58 are opened by the mechanical force that pushes the one against the other.
  • the pressure of the fluid in the auxiliary chamber 52 of the first coupling which initially was equal to the value P1, decreases, and the pressure in the section 18b of the main chamber 18 decreases accordingly.
  • the pressure in the section 18a also remains at the value P1.
  • the pressure in the section 18b of the first coupling does not instantaneously go to the value P1 because the calibrated throat 42 causes a delay.
  • the main valve element 26 is subjected to a pressure force opposed to the elastic force of the spring 38.
  • the pressure force exceeds the elastic force, the main valve element 26 assumes the open configuration.
  • the press-block coupling according to the present invention eliminates almost completely the leakages of fluid during the manoeuvres of connection and disconnection. During operation, the coupling has smaller head losses than do corresponding couplings of a known type, because the openings 20 are not obstructed by the presence of the main valve element 26.
  • Another major advantage of the press-block coupling according to the present invention is that the faces of mutual coupling 14 are almost completely smooth and can be cleaned with extreme ease. Furthermore, the present invention enables a multiple number of couplings independent from one another to be made inside one and the same base body 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Claims (6)

  1. Kupplungssystem für Flüssigkeitskreisläufe, das eine erste und eine zweite Druckblockkupplung (10) mit jeweils einem Grundkörper (12) aufweist, von denen jeder mit einer ersten Öffnung (16) versehen ist, die dazu bestimmt ist, mit einem Zweig eines Flüssigkeitskreislaufs verbunden zu werden, und von denen jeder mit einer zweiten Öffnung (20) versehen ist, die dazu bestimmt ist, eine Flüssigkeitsverbindung mit einer entsprechenden zweiten Öffnung (20) der komplementären Kupplung (10) herzustellen, wobei die erste und die zweite Druckblockkupplung (10) jeweils ein Hauptventilelement (26) aufweist, von denen jedes in einer zugehörigen Hauptkammer (18) bewegbar ist, welche in dem entsprechenden Grundkörper (12) ausgebildet ist, wobei jedes Hauptventilelement (26) mit einem zugehörigen Ventilsitz (24) zusammenwirkt, welcher dazu bestimmt ist, eine Flüssigkeitsverbindung zwischen jeder ersten Öffnung (16) und der entsprechenden zweiten Öffnung (20) herzustellen oder zu unterbrechen, dadurch gekennzeichnet, dass die ersten und die zweiten Druckblockkupplungen (10) jeweilige Hilfsventilelemente (58) mit mechanischer Öffnung aufweisen, die derart eingestellt sind, dass im Betrieb, infolge der mechanischen Offenstellung des Hilfsventilelements (58) eine Druckänderung in den Hauptkammern (18) erzeugt wird, um so eine Öffnung beider Hauptventilelemente (26) unter der Wirkung des Flüssigkeitsdruckes herbeizuführen.
  2. Kupplungssystem nach Anspruch 1, wobei das Hauptventilelement (26) jeder Druckblockkupplung (10) ein Kolbenteil (28) aufweist, das die entsprechende Hauptkammer (18) in zwei Sektionen (18a, 18b) teilt, wobei die erste (18a) den besagten Ventilsitz (24) enthält, und wobei die zweite (18b) mittels des entsprechenden Hilfsventilelementes (58) mit der zugehörigen Hilfsöffnung (54) in Flüssigkeitsverbindung steht.
  3. Kupplungssystem nach Anspruch 2, wobei das Hauptventilelement (26) jeder Druckblockkupplung (10) eine kalibrierte Einschnürung (42) umfasst, die die Sektionen (18a, 18b) der zugehörigen Hauptkammer (18) in Verbindung miteinander setzt.
  4. Kupplungssystem nach Anspruch 1, wobei der Grundkörper (12) jeder Druckblockkupplung (10) eine ebene Fläche (14) aufweist, in welcher die zweite Öffnung (20) und die Hilfsöffnung (54) ausgebildet sind.
  5. Kupplungssystem nach Anspruch 3, wobei das Hilfsventilelement (58) jeder Druckblockkupplung (10) ein Schließelement (58) aufweist, das in der geschlossenen Stellung teilweise aus der zugehörigen, ebenen Oberfläche (14) herausragt.
  6. Kupplungssystem nach Anspruch 2, wobei das Hauptventilelement (26) jeder Druckblockkupplung (10) ein Rückschlagventil (46) aufweist, das in eine Leitung (44, 48) eingefügt ist, die die Sektionen (18a, 18b) der zugehörigen Hauptkammer (18) miteinander verbindet.
EP00116843A 1999-08-06 2000-08-04 Spannblockkupplung für Druckmittelschaltkreise Expired - Lifetime EP1074749B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO990698 1999-08-06
IT1999TO000698A IT1310675B1 (it) 1999-08-06 1999-08-06 Raccordo ad innesto rapido per circuiti a fluido

Publications (3)

Publication Number Publication Date
EP1074749A2 EP1074749A2 (de) 2001-02-07
EP1074749A3 EP1074749A3 (de) 2002-10-02
EP1074749B1 true EP1074749B1 (de) 2004-04-14

Family

ID=11418022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00116843A Expired - Lifetime EP1074749B1 (de) 1999-08-06 2000-08-04 Spannblockkupplung für Druckmittelschaltkreise

Country Status (3)

Country Link
EP (1) EP1074749B1 (de)
DE (1) DE60009809T2 (de)
IT (1) IT1310675B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2384327B (en) * 2001-11-12 2005-06-22 Otto Harman Seyfarth Integrated Pneumatic manifold
DE50308358D1 (de) * 2003-11-07 2007-11-22 Moog Hydrolux S A R L Hydraulische Kupplungsvorrichtung
DE102010016490B4 (de) * 2010-04-16 2013-01-10 Lehnhoff Hartstahl Gmbh & Co. Kg Schnellwechselvorrichtung zum Ankoppeln eines Werkzeugs an eine Arbeitsmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910312A (en) * 1974-04-22 1975-10-07 Karl Weinhold Coupling for pressure conduits
US4094228A (en) * 1977-06-06 1978-06-13 Caterpillar Tractor Co. Fluid system having load pressure equalizing valve assemblies
DE3246738A1 (de) * 1982-09-28 1984-03-29 Dr. H. Tiefenbach Gmbh & Co, 4300 Essen Mit eigenmedium gesteuertes hydraulikventil mit einstellbarem durchlassquerschnitt
EP0126291B1 (de) * 1983-05-19 1988-07-27 GebràœDer Sulzer Aktiengesellschaft Druckmediumbetätigtes Ventil
NO177836C (no) * 1993-05-18 1995-12-06 Kvaerner Energy As Hydraulisk kobling

Also Published As

Publication number Publication date
DE60009809D1 (de) 2004-05-19
DE60009809T2 (de) 2005-03-31
ITTO990698A0 (it) 1999-08-06
EP1074749A3 (de) 2002-10-02
EP1074749A2 (de) 2001-02-07
IT1310675B1 (it) 2002-02-19
ITTO990698A1 (it) 2001-02-06

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