EP0067934A2 - Druckluftspareinrichtung - Google Patents

Druckluftspareinrichtung Download PDF

Info

Publication number
EP0067934A2
EP0067934A2 EP82103026A EP82103026A EP0067934A2 EP 0067934 A2 EP0067934 A2 EP 0067934A2 EP 82103026 A EP82103026 A EP 82103026A EP 82103026 A EP82103026 A EP 82103026A EP 0067934 A2 EP0067934 A2 EP 0067934A2
Authority
EP
European Patent Office
Prior art keywords
valve
fluid
chamber
seat
fact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82103026A
Other languages
English (en)
French (fr)
Other versions
EP0067934A3 (en
EP0067934B1 (de
Inventor
Migliori Luciano
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.)
UNIVER Srl
Original Assignee
UNIVER Srl
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 UNIVER Srl filed Critical UNIVER Srl
Publication of EP0067934A2 publication Critical patent/EP0067934A2/de
Publication of EP0067934A3 publication Critical patent/EP0067934A3/en
Application granted granted Critical
Publication of EP0067934B1 publication Critical patent/EP0067934B1/de
Expired legal-status Critical Current

Links

Images

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
    • F15B11/064—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 devices for saving the compressible medium
    • 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
    • F15B2211/30505—Non-return valves, i.e. check 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing valve

Definitions

  • This invention concerns a device for economizing on compressed air or other similar fluid used for controlling pneumatic cylinders of machine-tools or machines in general.
  • the conventional design of a compressed-air economizing device foresees the use of a pressure reducing valve or reducer in a feeding duct of the pneumatic cylinder, parallel to which is a single-acting valve to allow the flow of the compressed air in the opposite direction to that of the pressure reducing valve.
  • the devices known to date present a very complicated structure and consist substantially in placing a single-acting valve at the side of a pressure reducing valve.
  • the device consequently proves 'to be cumbersome in size and expensive to manufacture insofar as it calls for various machining operations in order to form the passages for the fluid and the seats of the two valves within the same body.
  • This invention aims to remedy these problems by providing a compressed-air economizing device, structured in such a way as to substantially simplify its construction and to make it possible to substantially reduce its overall dimensions.
  • the invention makes it possible moreover to optionally abolish the use of any springs whatsoever in the air flow passage thereby enabling the device itself to last longer and to function better.
  • this shows an example of application of a compressed-air economizing device 5 for controlling a pneumatic cylinder 1, the working stroke of which must be carried out with a first value of thrust power, by feeding for example compressed air at a pressure of approximately 5 or 6 Atm., whereas the return stroke can be carried out with a much lower value of power, for example with compressed air at a pressure of approximately 2 Atm., sufficient to overcome the friction in the system.
  • the chamber of the cylinder 1, on the opposite side to that of the rod 2, is connected directly to a source 3 of compressed air, through a distributor 4, whereas on the rod side it is connected to the aforementioned source, by means of an economizing device 5 in order to avoid a pointless waste of compressed air, at high pressure, just for the return stroke of the cylinder 1.
  • the pressure economizing device 5, in the diagram of figure 1, is schematically represented with the pressure reducer 6 inserted into a main passage for feeding the fluid under pressure to the cylinder 1, parallel to which is a single-acting valve 7 for allowing the fluid to flow from the cylinder 1 towards an outlet, that is to say, in the opposite direction to that mentioned previously, during the working stroke of the cylinder.
  • FIG. 2 of the accompanying drawing shows a first embodiment of compressed-air economizing device, according to this invention.
  • Such device comprises a body 8 conventionally defining an inlet 9 and an outlet 10 for the fluid. Between the inlet 9 and the outlet 10 the body is provided with a cavity 11 defining a pressure reducing chamber, into which is inserted, for example, screwed in, the body 12 of an automatic pressure reducing valve, described hereunder.
  • the pressure reducing valve 12 comprises a sleeve or cylindrical baffle 13 which extends axially into the chamber starting from the body 12 of the valve; the sleeve 13 thus defines an internal rectilinear section 14, of the main passage for the fluid, between the inlet 9 and the outlet 10.
  • a small piston 15 biased by a spring 16 the tension of which can be adjusted by acting upon a knob 17 in order to set the degree of reduction in the pressure.
  • the piston 15 extends towards the chamber 11 by means of a stem 18 onto which is screwed or fixed a shutter 19 which is movable towards a valve seat 20 situated on the inner end of the baffle or sleeve 13, as shown.
  • the section 14 of the main passage of the fluid, defined within the sleeve 13, communicates directly, on one side, with the pressure reducing chamber 11, which, in turn, opens out towards the outlet 10, whereas on the other side it communicates, by means of secondary passages, for example, by means of radial apertures 21 formed in the wall of the sleeve 13 situated above a single-acting valve, described further on, with an annular chamber 22 which coaxially encircles the sleeve 13 and which opens out towards the inlet 9.
  • annular chamber 22 is in direct communication with the inlet 9, however said annular chamber is also in communication with the fluid outlet 10, for example, through the pressure reducing chamber 11 itself, thus defining a branched out passage comprising a single-acting valve operating in the previously described manner.
  • a single-acting valve comprises an annular seat formed by a first circular ledge 23, on the outermost edge of the cylindrical sleeve 13, and by a second circular ledge 24 within the body 8 of the device; the two ledges 23 and 24 are radially separated from each other so as to create an annular passage for the fluid.
  • the single-acting valve is completed, in the example shown in figure 2, by an annular shutter 25, movable within the annular chamber 22; the shutter is made to close, against the seats 23 and 24, by a spring 26 and by the pressure of the fluid itself which is exerted within the chamber 22, during the passage from the inlet 9 to the outlet 10 of the fluid for controlling the working stroke of the cylinder 1.
  • the shutter 19 of the pressure reducing valve 12 is forced to close, against the seat 20, by the pressure of the fluid itself, whilst the single-acting valve 23, 24 and 25, overcoming the counter force of the spring 26, is made to open.
  • the concentric arrangement of the pressure-reducing valve and of the single-acting valve makes it possible to achieve a device with a compact and highly functional structure, insofar as the dimensions of the various parts and the sectional areas of flow of the fluid can be sized according to the desired capacity, keeping the overall dimensions of the entire device to a minimum.
  • the device may be made from any suitable material, at a very low cost, due to the fact, for example, that the body 8 of the device can now be moulded without calling for special machining.
  • the example in figures 3 and 4 shows an alternative embodiment of the device, aimed at a different embodiment of the single-acting valve; consequently the parts which remain unchanged, with respect to the previous case, bear the same numerical references.
  • the device of figure 3 also comprises a body 8 with an inlet 9 and an outlet 10 for the fluid in the indicated direction and a pressure reducing chamber 11 within which the reducing valve 19, 20 is situated.
  • Reference 13 indicates the cylindrical sleeve, defining the section 14 of the main passage of the fluid and the annular chamber 22, coaxial to the sleeve itself.
  • the reference numbers 23 and 24 still indicate the annular ledges on the sleeve 13 and on the body 8 of the device, defining the annular seat of the single-acting valve; unlike the previous example, here the shutter of the single-acting valve is made in such a way as to eliminate the need for any biasing spring whatsoever, due to the fact that any such spring could wear out as a result of its repeated and continuous operation, and due to the fact of being in direct contact with compressed air or a fluid which generally contains corrosive substances which tend to deteriorate the spring itself.
  • the elimination of such spring and its replacement with elastic characteristics of the element itself designed to form a seal makes it possible to substantially improve the device, whilst still maintaining the innovatory features of the previous example.
  • the shutter of the single-acting valve consists of a flexible washer, comprising a circular band 27 which fits tightly into a groove 29 formed on the outside of the cylindrical sleeve 23, from which protrudes, radially, an annular flange 28 connected to the circular band 27, by means of a portion 30 defining a flexible hinge.
  • the flange 28 fits tightly onto the aforementioned annular seats 23 and 24. Therefore, when the upper face of the flange 28, that is to say, that facing the annular chamber 13, is subjected to a greater pressure than that exerted upon the other face, the washer is pushed tightly against the seat 24, thereby closing the single-acting valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)
EP82103026A 1981-04-29 1982-04-08 Druckluftspareinrichtung Expired EP0067934B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT21438/81A IT1139088B (it) 1981-04-29 1981-04-29 Dispositivo economizzatore di aria compressa,comprendente una valvola unidirezionale coassiale ad una valvola riduttrice di pressione
IT2143881 1981-04-29

Publications (3)

Publication Number Publication Date
EP0067934A2 true EP0067934A2 (de) 1982-12-29
EP0067934A3 EP0067934A3 (en) 1983-01-12
EP0067934B1 EP0067934B1 (de) 1985-01-16

Family

ID=11181788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103026A Expired EP0067934B1 (de) 1981-04-29 1982-04-08 Druckluftspareinrichtung

Country Status (3)

Country Link
EP (1) EP0067934B1 (de)
DE (1) DE3261914D1 (de)
IT (1) IT1139088B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137320A (en) * 1983-03-31 1984-10-03 Graubremse Gmbh Pressure-limiting valve
AT386258B (de) * 1985-03-15 1988-07-25 Hoerbiger Ventilwerke Ag Steuerungsanordnung fuer pneumatische arbeitszylinder
GB2251477A (en) * 1990-12-15 1992-07-08 Gisag Ag A core shooting unit and valve therefor
WO2016202356A1 (de) * 2015-06-15 2016-12-22 Festo Ag & Co. Kg Antriebssystem und verfahren zum betreiben eines fluidbetätigen drehantriebs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102635587A (zh) * 2012-04-28 2012-08-15 汕头市甜甜乐糖果食品有限公司 气缸供气控制结构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1650440B2 (de) * 1967-09-26 1973-11-22 Knorr-Bremse Gmbh, 8000 Muenchen Drosselruckschlagventil
US3643684A (en) * 1970-03-16 1972-02-22 William L Moore Pressure control devices for pneumatic circuits
FR2343280A1 (fr) * 1976-03-05 1977-09-30 Bouteille Daniel Limiteur de debit unidirectionnel
US4175473A (en) * 1976-06-08 1979-11-27 Shoketsu Kinzoku Kogyo Kabushiki Kaisha Fluid circuit
FR2482212A1 (fr) * 1980-04-23 1981-11-13 Bouteille Daniel Dispositif economiseur de gaz comprime
FR2481403A1 (fr) * 1980-04-23 1981-10-30 Bouteille Daniel Dispositif economiseur d'air comprime

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137320A (en) * 1983-03-31 1984-10-03 Graubremse Gmbh Pressure-limiting valve
AT386258B (de) * 1985-03-15 1988-07-25 Hoerbiger Ventilwerke Ag Steuerungsanordnung fuer pneumatische arbeitszylinder
GB2251477A (en) * 1990-12-15 1992-07-08 Gisag Ag A core shooting unit and valve therefor
ES2082672A1 (es) * 1990-12-15 1996-03-16 Gisag Ag Giesserei Masch Disposicion de valvula de admision de aire a presion y de escape para maquinas de moldeo, especialmente para maquinas expulsoras de machos.
WO2016202356A1 (de) * 2015-06-15 2016-12-22 Festo Ag & Co. Kg Antriebssystem und verfahren zum betreiben eines fluidbetätigen drehantriebs

Also Published As

Publication number Publication date
DE3261914D1 (en) 1985-02-28
EP0067934A3 (en) 1983-01-12
IT1139088B (it) 1986-09-17
EP0067934B1 (de) 1985-01-16
IT8121438A0 (it) 1981-04-29

Similar Documents

Publication Publication Date Title
US4026322A (en) Reciprocating pump check valve assembly
EP0795707A1 (de) Hubventil
US7225830B1 (en) Fluid control valve
US4494572A (en) Four-way poppet valve assembly
US3886848A (en) Pressure operated directional control valve
JP3130932B2 (ja) パトローネ式弁
US4595170A (en) Solenoid valve
US5125575A (en) Valve
EP0520212A1 (de) Geschwindigkeitssteuerung
ES416870A1 (es) Perfeccionamientos introducidos en valvulas de retencion deseguridad.
US4026327A (en) Rapid opening valve for steam-operated power devices
GB2327740A (en) Valve seal mechanism
US4458718A (en) Spool valve and seal having zero leakage
EP0067934B1 (de) Druckluftspareinrichtung
US4020863A (en) Fluid pressure regulator construction
US3283784A (en) Control valve for hydraulic machinery
US5255604A (en) Pressure fluid supply valve assembly
US5630401A (en) Combined fuel injection pump and nozzle
US4905730A (en) Override check valve
US6382243B2 (en) Pressure-reducing valve
US8011639B2 (en) Poppet type flow control valve
KR950033122A (ko) 유체압 피스톤 발동기
US4407640A (en) Reciprocating pump having unique pressure control valve construction
EP0097246A2 (de) Ventilvorrichtung zum langsam unter Druck bringen von pneumatischen Systemen
US3316926A (en) Pressure responsive supply-exhaust valve

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): CH DE FR GB LI NL SE

AK Designated contracting states

Designated state(s): CH DE FR GB LI NL SE

17P Request for examination filed

Effective date: 19830303

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): CH DE FR GB LI NL SE

REF Corresponds to:

Ref document number: 3261914

Country of ref document: DE

Date of ref document: 19850228

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19860430

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19870409

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19870430

Ref country code: CH

Effective date: 19870430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19871101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19871230

GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19880101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881121

EUG Se: european patent has lapsed

Ref document number: 82103026.9

Effective date: 19880906