EP0808665A2 - Valve à piston - Google Patents

Valve à piston Download PDF

Info

Publication number
EP0808665A2
EP0808665A2 EP97107993A EP97107993A EP0808665A2 EP 0808665 A2 EP0808665 A2 EP 0808665A2 EP 97107993 A EP97107993 A EP 97107993A EP 97107993 A EP97107993 A EP 97107993A EP 0808665 A2 EP0808665 A2 EP 0808665A2
Authority
EP
European Patent Office
Prior art keywords
liquid
extension
piston valve
cylinder
valve 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.)
Granted
Application number
EP97107993A
Other languages
German (de)
English (en)
Other versions
EP0808665A3 (fr
EP0808665B1 (fr
Inventor
Gunter Dr. Börner
Jörg Dr. Sopka
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.)
ABB Research Ltd Switzerland
Original Assignee
ABB Research Ltd Switzerland
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 ABB Research Ltd Switzerland filed Critical ABB Research Ltd Switzerland
Publication of EP0808665A2 publication Critical patent/EP0808665A2/fr
Publication of EP0808665A3 publication Critical patent/EP0808665A3/fr
Application granted granted Critical
Publication of EP0808665B1 publication Critical patent/EP0808665B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
    • B05B5/1658—Details
    • B05B5/1666—Voltage blocking valves, e.g. with axially separable coupling elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/1481—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating different fluids, e.g. liquid coating materials from solvent or air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
    • B05B5/1625—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material the insulating means comprising an intermediate container alternately connected to the grounded material source for filling, and then disconnected and electrically insulated therefrom
    • 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
    • Y10T137/8376—Combined

Definitions

  • the invention relates to a piston valve for liquids with potential separation between liquids on the input and output sides at different electrical potentials according to the preamble of claim 1.
  • valve can be used to control electrically conductive liquids, such as water-based paint, which are sprayed with electrostatic charge. Potential differences of approximately 100 kV direct voltage can occur between the valve inlet and outlet.
  • the invention is therefore based on the object of specifying a piston valve for liquids and with electrical isolation, which has a longer service life.
  • a field strength reduction is achieved which leads to a significant improvement in the durability of the valve materials.
  • an electrical field strength in the valve body of less than 20 kV / mm can be achieved with potential differences of up to 200 kV.
  • the desired field strength reduction can be set by suitable electrode design and by additional electrodes.
  • Figures 1 and 2 show a schematic representation of a preferred valve design.
  • a valve piston 1 which is movable therein and which is also made of an electrically insulating material.
  • Suitable materials for the electrically insulating cylinder 5 are ceramics and in particular glasses, for example borosilicate glasses.
  • the piston is provided with sealing rings 10.
  • the piston 1 is displaced in the cylinder 5 with the aid of a pneumatic, hydraulic or electrical drive (not shown), as a result of which a liquid inlet 12 is opened, as shown in FIG. 1, or is closed, as in FIG is shown.
  • an additional insulation liquid 14 can also be pressed into the space between valve piston 1 and cylinder 5. This additional insulation liquid 14 should be selected in a media-specific manner since it contaminates the liquid 8 controlled by the valve. If the controlled liquid 8 is water-based paint, paraffin oil offers itself as an additional insulation liquid 14.
  • a control electrode 2 is arranged on an extension 11 of the cylinder 5.
  • the extension 11 is made of metal.
  • this extension can also be made from the electrically insulating material of the cylinder 5 instead of metal.
  • the metal should be chemically resistant to the medium, e.g. Be water-based paint.
  • a suitable material for the extension 11 is steel.
  • the metallic extension 11 can be connected to the electrically insulating cylinder 5, for example by gluing or melting, the connection point being smoothed inside so that the valve piston 1 can slide over the connection point.
  • the metallic extension 11 shown is shaped to the control electrode 2, so that there is an electrical connection between the control electrode 2 and the liquid 8.1 located at an outlet 9. If the extension is not made of metal, but of electrically insulating material, e.g. Glass is made, the control electrode 2 is placed and melted so that there is also an electrical connection between the liquid 8.1 and the electrode 2.
  • An electrode shape with a radius of curvature of at least three millimeters is particularly suitable. The control electrode 2 is therefore always at the potential of the liquid 8.1 on the outlet side and causes a field strength reduction at the valve.
  • Electrical insulation from the outside can be achieved by enveloping the valve arrangement with an electrical insulation means 3, for example polyethylene. If a liquid insulation medium, for example an oil, is used, a correspondingly tight housing 4 around the insulation medium 3 is necessary.
  • additional electrodes 6, 7 can be arranged to further reduce the field strength.
  • a first additional electrode 6 is arranged on a further extension 11.1. Both for the further extension 11.1 and for the first additional electrode 6, the description of the extension 11 or electrode 2 applies analogously with regard to material, design and potential.
  • a second additional electrode 7 is arranged on a feed line 15 and is at ground potential.

Landscapes

  • Electrically Driven Valve-Operating Means (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Valve Device For Special Equipments (AREA)
  • Compressor (AREA)
  • Sliding Valves (AREA)
  • Nozzles (AREA)
EP97107993A 1996-05-22 1997-05-16 Valve à piston Expired - Lifetime EP0808665B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19620577 1996-05-22
DE19620577A DE19620577A1 (de) 1996-05-22 1996-05-22 Kolbenventil

Publications (3)

Publication Number Publication Date
EP0808665A2 true EP0808665A2 (fr) 1997-11-26
EP0808665A3 EP0808665A3 (fr) 2001-01-24
EP0808665B1 EP0808665B1 (fr) 2003-03-05

Family

ID=7794992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97107993A Expired - Lifetime EP0808665B1 (fr) 1996-05-22 1997-05-16 Valve à piston

Country Status (6)

Country Link
US (1) US5797590A (fr)
EP (1) EP0808665B1 (fr)
JP (1) JPH10109053A (fr)
KR (1) KR970073738A (fr)
AT (1) ATE233605T1 (fr)
DE (2) DE19620577A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032231A1 (fr) * 1997-12-18 1999-07-01 LACTEC GmbH Gesellschaft für moderne Lackiertechnik Procede et dispositif pour isoler un milieu en ecoulement electroconducteur
US6849129B2 (en) 2002-03-13 2005-02-01 Lactec Gmbh Paint-spraying apparatus for applying liquid coating material to workpieces

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003225645A1 (en) * 2002-03-01 2003-09-16 Engineered Machined Products, Inc. A fluid valve
US20050101923A1 (en) * 2003-11-10 2005-05-12 Leading Edge Innovations, Inc. Male urinary incontinence sheath
US20070102662A1 (en) * 2005-11-04 2007-05-10 Gliders, Inc. Valve for single-use and multi-use applications
DE102006025549B4 (de) 2006-06-01 2019-04-04 Eisenmann Se Ventil

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955796A (en) * 1975-02-12 1976-05-11 M & J Valve Company Flow control apparatus
DE2838976C2 (de) * 1978-09-07 1983-10-13 Otto Fritz GmbH Normalschliff-Aufbaugeräte, 6238 Hofheim Dosierventil
DE3431701A1 (de) * 1984-08-29 1986-03-06 Laborglas Miethke GmbH, 5090 Leverkusen Glasventil
CA2055901A1 (fr) * 1990-11-26 1992-05-27 James J. Gimple Revetement automatique utilisant des matieres de revetement conductrices
CA2059427C (fr) * 1991-01-22 2000-03-28 Ichirou Ishibashi Structure permettant d'empecher les pertes de courant dans les appareils de pulverisation electrostatique
US5201493A (en) * 1992-03-12 1993-04-13 Kim Young M Electrically insulated ball valve device
EP0640017B1 (fr) * 1992-05-15 1998-07-22 Abb Trallfa Robot A/S Dispositif de dosage de peinture pour systeme de peinture par pulverisation commande par programme
DE4444671A1 (de) * 1994-12-15 1996-06-20 Abb Patent Gmbh Lackförderpumpe
JP2598767B2 (ja) * 1994-12-27 1997-04-09 エービービー・インダストリー株式会社 塗装用スプレーガン

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032231A1 (fr) * 1997-12-18 1999-07-01 LACTEC GmbH Gesellschaft für moderne Lackiertechnik Procede et dispositif pour isoler un milieu en ecoulement electroconducteur
US6422491B1 (en) 1997-12-18 2002-07-23 Lactec Gmbh Gesellschaft Fuer Moderne Lackiertechnik Method and device for isolating an electro-conductive flowing medium
US6849129B2 (en) 2002-03-13 2005-02-01 Lactec Gmbh Paint-spraying apparatus for applying liquid coating material to workpieces

Also Published As

Publication number Publication date
DE19620577A1 (de) 1997-11-27
ATE233605T1 (de) 2003-03-15
KR970073738A (ko) 1997-12-10
US5797590A (en) 1998-08-25
DE59709420D1 (de) 2003-04-10
EP0808665A3 (fr) 2001-01-24
JPH10109053A (ja) 1998-04-28
EP0808665B1 (fr) 2003-03-05

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