EP0122247B1 - Steuerventil - Google Patents

Steuerventil Download PDF

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Publication number
EP0122247B1
EP0122247B1 EP84850112A EP84850112A EP0122247B1 EP 0122247 B1 EP0122247 B1 EP 0122247B1 EP 84850112 A EP84850112 A EP 84850112A EP 84850112 A EP84850112 A EP 84850112A EP 0122247 B1 EP0122247 B1 EP 0122247B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressurized fluid
piston
control valve
slide
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
Application number
EP84850112A
Other languages
English (en)
French (fr)
Other versions
EP0122247A1 (de
Inventor
Lars Grundby
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.)
Mecman AB
Original Assignee
Mecman AB
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 Mecman AB filed Critical Mecman AB
Priority to AT84850112T priority Critical patent/ATE28688T1/de
Publication of EP0122247A1 publication Critical patent/EP0122247A1/de
Application granted granted Critical
Publication of EP0122247B1 publication Critical patent/EP0122247B1/de
Expired 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
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/068—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam with valves for gradually putting pneumatic systems under pressure

Definitions

  • the invention relates to a control valve for connection to a source of pressurized. fluid and providing a controlled supply of pressurized fluid, especially pressurized air, to a pressurized fluid system, so as to secure a gradual build-up of the pressure in said fluid system.
  • Such a control or air supply valve is known from SE-B-418523 (corr. DE-A-3027022) and ensures that the pressure increase will be relatively slow during a first phase of air supply, so as to avoid that work cylinders or other apparatus operable by pressure perform sudden movements under the influence of a pressure shock.
  • SE-B-418523 corr. DE-A-3027022
  • Such a control or air supply valve ensures that the pressure increase will be relatively slow during a first phase of air supply, so as to avoid that work cylinders or other apparatus operable by pressure perform sudden movements under the influence of a pressure shock.
  • DE-A-2 245 017 describes a valve structure similar to the one defined in the preamble of claim 1 hereinafter.
  • the known hydraulic valve is a directional or pressure limiting valve providing automatic directional control or pressure limitation, depending on which ports are plugged. It is not intended and cannot be used for a controlled, gradual pressure build-up in a connected fluid system.
  • the object of the present invention is to considerably simplify the valve structure known from the above-mentioned SE-B-418523 in such a way that the main valve is integrated with the choke and pressure control valve, so that these valve parts can be accommodated in a common valve chamber in a valve casing.
  • the slide of the valve is provided with a piston, which is displaceable thereon and which, in the air supply position of the valve (wherein the inlet port communicates with the outlet port connected to the pressurized fluid system in question), is displaceable between an initial position, in which the inlet port communicates with the outlet port only via the choke opening and a final position, in which the inlet port communicates with the outlet port via the flow passage having a relatively large cross-sectional area as well.
  • control valve may comprise only one valve chamber, in which the valve slide with the adjoining piston body is displaceable. Moreover, a considerable structural simplification is achieved by avoiding two separate valves each being arranged in a separate valve chamber and being connected to each other via a number of conduits or channels in the valve casing. Manufacture as well as operation and reliability will be enhanced thereby.
  • a particularly good operation is achieved if the piston, being displaceable on the valve slide, is provided with a piston surface-facing the outlet port and being so dimensioned that, upon reaching a predetermined pressure in the connected pressurized fluid system, it is subjected to a reversing force, which exceeds a counter-force, e.g. exerted by a compression spring, so that the piston is displaced to said final position.
  • a counter-force e.g. exerted by a compression spring
  • the control valve shown in Fig. 1 comprises a two-part valve casing with an upper casing half 1 and a lower casing half 2 being screwed together into mutual contact in a parting plane and being sealed by means of a combination sealing element, which is formed in one piece and includes a planar portion (not shown) located in said parting plane as well as ring portions connected thereto and oriented perpendicularly to the planar portion. In Fig. 1 these ring portions are denoted 3a-3f.
  • Each casing half 1, 2 has half-cylindrical recesses located adjacent to the parting plane and forming together a cylindrical valve chamber 4.
  • a cylinder tube 5 which is provided with several hole openings (to be explained further below) and is externally sealed in the axial direction by means of the above-mentioned sealing ring portions 3a-3f.
  • end portions 6, 7 are inserted, so that the valve chamber 4 only communicates outwardly via the hole openings of the cylinder tube 5 and via recesses 6a, 7a in each end portion.
  • valve slide 8 is displaceably mounted inside the cylinder tube 5.
  • the valve slide 8 is provided, at its end portion to the left in the figure, with a fixed piston portion 8a with two sealing rings 9, 10, which sealingly contact the inside of the cylinder tube 5.
  • the opposite end of the valve slide consists of a central, rather narrow shank 8b, on which an enclosing, cylindrical piston 11 is displaceable between a first abutment 12 formed by a shoulder surface at the foot of the shank 8b, and a second abutment 13 consisting of a steel ring, e.g. a so called Seeger-ring, inserted in an annular groove on the shank 8b.
  • the movable piston body has piston portions 14 and 15, respectively, each provided with a piston sealing ring 16 and 17, respectively, at each end.
  • a helical compression spring 18 is inserted between the end portion 7 and the movable piston 11, so that the valve slide 8 and the piston 11 takes the position shown in Fig. 1 in the absence of other forces.
  • the valve casing 1, 2 is provided with a number of connecting ports, which communicate with the valve chamber 4 via the hole openings of the cylinder tube and the recesses 6a, 7a of the end portions, respectively, namely an inlet port 19 to be connected to a source of pressurized fluid (not shown), e.g. a central compressor unit, an outlet port 20 to be connected to a pressurized fluid system, e.g. a pneumatic system having working cylinders and components belonging thereto, an exhaust port 21, e.g. for venting the connected pressurized fluid system, and an actuating port 22 to be pressurized for displacement of the valve slide 8 to the right against the action of the spring 18, and an evacuation port 23.
  • a source of pressurized fluid e.g. a central compressor unit
  • an outlet port 20 to be connected to a pressurized fluid system, e.g. a pneumatic system having working cylinders and components belonging thereto
  • valve casing 1 In the right part of the valve casing 1, 2, there is also inserted an adjusting screw 24 in a central through-bore in the valve casing and a threaded hole in the end portion 7 opposite to the end of the shank 8b of the valve slide 8. Thereby, an adjustable stop means is obtained for the valve slide 8.
  • the adjusting screw 24 can be fixed in an adjusted position by means of a lock nut 25 which is tightened into contact with the outside of the valve casing.
  • the control valve In the shown position in Fig. 1, the control valve is closed.
  • the source of pressurized fluid communicates via the inlet port 19, an adjoining ring chamber 26, a set of hole openings 27 having a relatively large cross-sectional area and a choke hole 28 having a substantially smaller cross-sectional area, with the limited chamber formed between the sealing rings 26 and 27 of the movable piston body.
  • the pressurized fluid system is vented in that the outlet port 20, connected thereto, communicates with the exhaust port 21 via an annular chamber 31 a set of hole openings 29 in the cylinder tube 5, the annual space between the inside of the cylinder tube 5 and the outside of the valve slide 8, still another set of hole openings 30 in the cylindertube 5, and an annular chamber 32.
  • valve slide 8 and the piston 11 displaceable thereon can be reversed to a second, opening position according to Fig. 2 in that a control signal (e.g. pressurized air) is fed to the actuation port 22.
  • a control signal e.g. pressurized air
  • the connection between the outlet port 20 and the exhaust port 21 is broken, while the pressurized fluid from the source of pressurized fluid flows through the inlet port 19, the annular chamber 26, the choke hole 28, the hole openings 29, the annular chamber 31 and the outlet port 20 into the connected pressurized fluid system.
  • a pressure build-up will occur relatively slowly, owing to the limited flow through the choke hole 28, so that possibly mal- positioned cylinder pistons or the like are displaced into distinct positions.
  • a desired flow rate can be set by means of the adjusting screw 24, whereby the position of the sealing ring 16 can be varied relative to the choke hole 28.
  • the choke hole 28 may be more or less covered by the sealing ring 16, so that the effective cross-sectional area is adjusted correspondingly.
  • the pressure grows gradually in the pressurized fluid system and consequently also in the annular chamber between the fixed piston portion 8a of the valve slide and the displaceable piston 11.
  • the pressure acts on the end surface of the piston 11 facing the outlet port 20, and when the pressure force caused thereby exceeds the counter-force of the spring 18, the piston 11 will be displaced from the initial position according to Fig. 2 into a final position, which is shown in Fig. 3, wherein its opposite end surface engages with the stop ring 13.
  • the distance (in the axial direction) between the choke hole 28 and the hole openings 27 is less than the displacement of the piston 11, and the hole openings 27 will therefore be laid free on the same side as the choke hole 28 after the passage of the sealing ring 16.
  • the inlet port 19 will communicate with the outlet port 20 also via these hole openings 27, which have a substantially larger cross sectional area than the choke hole 28. Therefore, the pressurized fluid flow can increase quickly, so that the further pressure build-up in the connected pressurized fluid system occurs relatively quickly during this second phase of the pressurized fluid supply.
  • valve slide 8 When the control valve is to be closed again and the pressurized fluid system is to be vented, the valve slide 8 is relocated in that the pressure on the signal port 22 is brought to cease, whereby the compression spring 18 displaces the valve slide and the piston 11 to the left in the figures, and the position according to Fig. 1 is reached.
  • the choke opening 28 does not have to be an elongated hole, as shown, but can be constituted by e.g. a number of small holes distributed axially and/or circumferentially in such a way that the effective dross-sectional area is adjustable.
  • One or several of these holes may furthermore consist of an elongated slot extending all the way to the hole openings 27. Even the latter may have a different configuration and a variable, effective cross-section.
  • the essential feature is that the choke opening 28 has a considerably smaller cross sectional area than the one of the flow passage formed by the hole openings 27.
  • a cylinder tube 5 provided with holes
  • said cylinder tube may in principle be eliminated and, instead, the various openings may be located directly in the valve casing.
  • the adjusting screw 24 may be eliminated or replaced by a stop displaceably arranged on the shaft 8b of the valve slide, e.g. a nut which is screwed onto the shank and replaces the stop ring 13 as well.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Driven Valves (AREA)
  • Valve Device For Special Equipments (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Control Of Fluid Pressure (AREA)

Claims (7)

1. An eine Druckfluidquelle anschließbares Steuerventil zur gesteuerten Versorgung eines Druckfluidsystems mit einem Druckfluid derart, daß in besagtem Fluidsystem ein allmählich ansteigender Druckaufbau sichergestellt ist, das ein Ventilgehäuse (1, 2) aufweist, mit einer Ventilkammer (4), einer mit besagter Druckfluidquelle verbindbaren Zuflußöffnung (19), einer mit dem Druckfluidsystem verbindbaren Ausflußöffnung (20) und einer Enttüftungs- öffnung (21) und bei dem ein in der Ventilkammer (4) bewegbarer Ventilschieber (8) zwischen einer ersten Position, in welcher die Ausflußöffnung (20) mit der Entlüftungsöffnung (21) verbunden ist, und einer zweiten Position, in welcher die Zuflußöffnung (19) mit der Ausflußöffnung (20) verbunden ist, verschiebbar ist und mit Mitteln (28) zur Begrenzung des Flusses des Druckfluids in besagter zweiter Position des Ventilschiebers (8) während einer ersten Phase des Druckaufbaus in dem angeschlossenen Druckfluidsystem und bei dem besagte Zuflußöffnung (19) mit der Ventilkammer (4) einerseits über eine Durchflußöffnung (27) mit relativ großer Querschnittsfläche und andererseits über eine Drosselöffnung (28) mit beträchtlich kleinerer Querschnittsfläche in Verbindung steht, dadurch gekennzeichnet, daß der Ventilschieber (8) mit einem auf ihm verschiebbaren Kolben (11) versehen ist, der in besagter zweiter Position des Ventilschiebers (8) zwischen einer Anfangsposition, in welcher die Zuflußöffnung (19) mit der Ausflußöffnung (20) nur über die Drosselöffnung (28) verbunden ist, und einer Endposition, in welcher die Zuflußöffnung (19) mit der Ausflußöffnung (20) außerdem über besagte Durchflußöffnung (27). mit relativ großer Querschnittsfläche verbunden ist, verschiebbar ist.
2. Steuerventil nach Anspruch 1, dadurch gekennzeichnet, daß der Kolben (11) mit einer Dichtung (16) versehen ist, die in besagter Anfangsposition zwischen der Drosselöffnung (28) und der Durchflußöffnung (27) angeordnet ist, wobei eine der Ausflußöffnung (20) zugewandte Kolbenoberfläche so dimensioniert ist, daß er beim Erreichen eines vorgegebenen Druckes des dem Druckfluidsystem zugeführten Druckfluids einer umsteuernden Kraft ausgesetzt ist, die eine Gegenkraft überschreitet und dadurch den Kolben (11) in besagte Endposition verschiebt.
3. Steuerventil nach Anspruch 2, dadurch gekennzeichnet, daß besagte Gegenkraft durch eine Druckfeder (18) erzeugt wird.
4. Steuerventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kolben (11) auf einem Schaft (8b) des Ventilschiebers (8) verschiebbar ist.
5. Steuerventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Anfangsposition des Kolbens (11) mittels getrennter Justiermittel einstellbar ist, wodurch die effektive Querschnittsfläche besagter Drosselöffnung (28) verändert wereden kann.
6. Steuerventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Ventilkammer (4) durch ein Zylinderrohr (5) begrenzt ist, dessen Innenraum mit den verschiedenen Ventilöffnungen (19, 20, 21) über Lochöffnungen (27, 28, 29, 30) im Zylinderrohr (5) verbunden ist, wobei besagte Durchflußöffnung (27) und besagte Drosselöffnung (28) durch derartige Lochöffnungen gebildet sind.
7. Steuerventil nach Anspruch 6, dadurch gekennzeichnet, daß das Ventilgehäuse in zwei Gehäuseteile (1, 2) aufgeteilt ist und daß die Mittelachse des Zylinderrohres (5) in der Teilungsebene liegt.
EP84850112A 1983-04-11 1984-04-09 Steuerventil Expired EP0122247B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84850112T ATE28688T1 (de) 1983-04-11 1984-04-09 Steuerventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8301993A SE442434B (sv) 1983-04-11 1983-04-11 Styrventil for kontrollerad tryckmedietillforsel till och tryckuppbyggnad i ett tryckmediesystem
SE8301993 1983-04-11

Publications (2)

Publication Number Publication Date
EP0122247A1 EP0122247A1 (de) 1984-10-17
EP0122247B1 true EP0122247B1 (de) 1987-07-29

Family

ID=20350744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84850112A Expired EP0122247B1 (de) 1983-04-11 1984-04-09 Steuerventil

Country Status (9)

Country Link
EP (1) EP0122247B1 (de)
JP (1) JPS60501020A (de)
AT (1) ATE28688T1 (de)
DE (1) DE3465134D1 (de)
DK (1) DK159796C (de)
FI (1) FI73804C (de)
HU (1) HU197420B (de)
SE (1) SE442434B (de)
WO (1) WO1984004147A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4324939A1 (de) * 1993-07-24 1995-01-26 Festo Kg Kolbenschieberventil
US11590642B2 (en) * 2017-07-24 2023-02-28 Furukawa Rock Drill Co., Ltd. Hydraulic hammering device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5067519A (en) * 1990-11-26 1991-11-26 Ross Operating Valve Company Safety valve for fluid systems
DE4223358C2 (de) * 1992-07-16 1994-11-03 Festo Kg Kolbenschieberventil
WO2000046531A1 (en) * 1999-02-03 2000-08-10 Split-Cycle Technology Limited Improvements in air motors
FR2799815B1 (fr) * 1999-10-15 2002-01-04 Crouzet Automatismes Canalisation et distributeur a air comprime utilisant la canalisation
JP5984575B2 (ja) * 2012-08-15 2016-09-06 Ｋｙｂ株式会社 切換弁

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3027022A1 (de) * 1979-07-20 1981-02-05 Mecman Ab Ventilvorrichtung zur kontrollierten zufuhr von druckmittel

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2030839A5 (de) * 1969-09-05 1970-11-13 Bosch
FR2176198A5 (de) * 1972-03-14 1973-10-26 Westinghouse Freins & Signaux
JPS5434484B2 (de) * 1972-09-11 1979-10-27
DE2245017C3 (de) * 1972-09-14 1978-09-14 Reinhard 4050 Moenchengladbach Kucharzyk Einrichtung zur Steuerung der Druckmittelbeaufschlagung eines Arbeitskolbens einer Kraftmaschine
JPS5122127A (ja) * 1974-08-20 1976-02-21 Toyooki Kogyo Kk Ryutaiseigyoben
US3952775A (en) * 1975-03-14 1976-04-27 Shoketsu Kinzoku Kogyo Kabushiki Kaisha Electromagnetic change-over valve
GB1516902A (en) * 1975-05-05 1978-07-05 Borg Warner Regulator valve
JPS5734366Y2 (de) * 1978-05-13 1982-07-29
DE2833358C2 (de) * 1978-07-29 1983-11-10 Mannesmann AG, 4000 Düsseldorf Umsteuerventil eines Druckluftmotors
SE8000552L (sv) * 1980-01-23 1981-07-24 Mecman Ab Tetningsanordning for ventilhus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3027022A1 (de) * 1979-07-20 1981-02-05 Mecman Ab Ventilvorrichtung zur kontrollierten zufuhr von druckmittel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4324939A1 (de) * 1993-07-24 1995-01-26 Festo Kg Kolbenschieberventil
US11590642B2 (en) * 2017-07-24 2023-02-28 Furukawa Rock Drill Co., Ltd. Hydraulic hammering device

Also Published As

Publication number Publication date
DK159796B (da) 1990-12-03
DK159796C (da) 1991-07-22
SE8301993L (sv) 1984-10-12
EP0122247A1 (de) 1984-10-17
SE8301993D0 (sv) 1983-04-11
DK543384D0 (da) 1984-11-15
SE442434B (sv) 1985-12-23
HU197420B (en) 1989-03-28
WO1984004147A1 (en) 1984-10-25
FI844616A0 (fi) 1984-11-23
JPH0553994B2 (de) 1993-08-11
HUT35354A (en) 1985-06-28
JPS60501020A (ja) 1985-07-04
DK543384A (da) 1984-11-15
ATE28688T1 (de) 1987-08-15
FI73804B (fi) 1987-07-31
FI844616L (fi) 1984-11-23
DE3465134D1 (en) 1987-09-03
FI73804C (fi) 1987-11-09

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