EP1500435A2 - Procédé et dispositif de commande de potentiel d'un arangement de tuyauteries nettoyées par raclage - Google Patents

Procédé et dispositif de commande de potentiel d'un arangement de tuyauteries nettoyées par raclage Download PDF

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Publication number
EP1500435A2
EP1500435A2 EP04016358A EP04016358A EP1500435A2 EP 1500435 A2 EP1500435 A2 EP 1500435A2 EP 04016358 A EP04016358 A EP 04016358A EP 04016358 A EP04016358 A EP 04016358A EP 1500435 A2 EP1500435 A2 EP 1500435A2
Authority
EP
European Patent Office
Prior art keywords
pig
potential
station
conductive medium
hose
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
EP04016358A
Other languages
German (de)
English (en)
Other versions
EP1500435A3 (fr
EP1500435B1 (fr
Inventor
Andreas Geiger
Peter Hofmann
Siegfried Poppe
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.)
Duerr Systems AG
Original Assignee
Duerr Systems AG
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 Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP1500435A2 publication Critical patent/EP1500435A2/fr
Publication of EP1500435A3 publication Critical patent/EP1500435A3/fr
Application granted granted Critical
Publication of EP1500435B1 publication Critical patent/EP1500435B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/10—Arrangements for supplying power, e.g. charging power
    • 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

Definitions

  • the invention relates to a method and a device for Potential control of a gemollchten line arrangement according to the preamble of the independent claims.
  • Molded line arrangements are known to be required in coating systems for the electrostatic serial coating of workpieces such as vehicle bodies with water-based paint or similarly conductive coating material, which is conveyed through the line by a pig or between two pigs from a pigging station to the pig destination station (EP 1 108 475, EP 1 172 152, EP 1 270 083, EP 1 314 483, etc.).
  • the promotion can take place from a pig station located on the ink supply side to ground potential to a pig station located on the high voltage potential of the electrostatic atomizer serving as the application element of the plant and also in the opposite direction when recovering non-sprayed coating material, wherein the coating material initially has the potential of Molchsendestation has and is approaching the pig destination station charged to its potential or discharged.
  • other conductive media such as rinsing liquid.
  • relatively long hoses are used as a common line, which must produce an insulating path for electrical isolation between the system components under high voltage, for example in the area of the atomizer and the ink supply located at ground potential, and consist of suitable plastics for this purpose.
  • multi-layered hoses are used, the inner layer of which is made of a plastic chosen for piggability, such as PFA, while an outer or intermediate layer is made of a high-voltage strength insulating material, such as PE, which may be surrounded by an outer protective sheath, for example of PUR ( DE 102 39 516).
  • PE high-voltage strength insulating material
  • PE outer protective sheath
  • Pig-tubing of electrostatic coating systems should generally insulate as well as possible and therefore usually form a higher electrical resistance than the air contained in them.
  • the volume resistivity of conventional PFA pig tubes is about 10 16 ohm.m.
  • the invention is therefore based on the object, a method or to specify a device of the type considered, the unwanted current peaks during loading or unloading of the molten wire conveyed conductive medium and before all unwanted plant shutdown without affecting the Target potentials and in particular the high voltage at the application organ avoids.
  • the coating material or other conductive media when approaching the pig destination station via a high-impedance damping resistor to its potential is placed before a distance from the conductive component the pig destination station is reached at which it to a Voltage breakdown, i. to sudden loading or unloading of the conductive medium can become sparks and unwanted current peaks and a resulting shutdown the coating system reliably avoided, and there the inventively provided damping resistance at least not during the coating within the electrical Connection of the high voltage generator with the application organ is also no unwanted voltage drop to Application organ occur. Nor does the earth potential the supply-side pig station impaired.
  • the conductive medium charged by a damping resistor or unloading between the potential of each Pig target station and a conductive medium contacting electrically conductive contact point of the line connected is.
  • the conductive medium however, of the self-damping resistance charging or discharging.
  • This has the particular advantage that no additional components such as external damping resistors, High voltage cable and distributor are necessary. Cheap is Also, that the newts are not affected by a separation point in the Hose can be affected.
  • the damping resistance each electrically parallel to the approach of the conductive medium to the pig station between the medium and the electrically conductive component of the pig station formed Isolierrange or, in other words, in parallel to the paint or medium column reaching the pig station switched and connected within the line to this.
  • the conductive medium over a To increase damping resistance when approaching the medium to the pig destination station in the electrical connection of the High voltage generator connected to the application organ and bridged during the coating electrically conductive becomes.
  • a corresponding resistor arrangement is also on the supply side between the pig station and its ground potential connection conceivable.
  • the line arrangement shown schematically in Fig. 1 contains a e.g. with a color change valve arrangement or possibly a dosing connected first pig station 1, whose electrically conductive components on a ground connection grounded, a second pig station 2, which with a electrostatic atomizer 3 is connected and close to or may be arranged in this, and their electrical conductive components of a high voltage generator 4 the high voltage potential also at the atomizer e.g. be placed in the order of 100 kV. Further the line arrangement contains one of the two pig stations 1 and 2 connecting hose 5 made of insulating material.
  • the tube 5 is electrically conductive in a known manner Paint 6 between two pigs 7 and 8 to supply the Atomizer 3 from the first pig station 1 to the second Pig station 2 and possibly not sprayed in recovery Color material from the second pig station back to promoted the first pig station.
  • the high voltage generator 4 may vary depending on the type of installation in or near the atomizer 3 or in other cases, in particular robot systems, as shown at a remote location.
  • the for potential separation between the two pig stations 1 and 2 required Isolierumblen are also in known manner through the tube 5 and preferably from Air existing insulating medium formed, which is located on the Farblack opposite sides of the pigs in the tube 5 is located and also serves as a pig pushing medium.
  • Air existing insulating medium formed which is located on the Farblack opposite sides of the pigs in the tube 5 is located and also serves as a pig pushing medium.
  • paint may also be another electrically conductive medium such as in particular Rinsing fluid are conveyed through the tube 5.
  • the Near each pig station 1 and 2 one each passing by Color ink electrically contacting pad 10 and 12 respectively provided and a damping resistor 13 between the at the first pig station 1 provided contact point 10 and mass switched while another damping resistor 14 between the intended at the second pig station 2 contact point 12 and one connected to the high voltage generator 4 High voltage connection of the second pig station switched is.
  • the distances of the contact points 10 and 12 of the conductive components of each adjacent pig stations 1 and 2 along the tube 5 are at least as large as the insulating distance sufficient minimum distance Paint column from the pig station, below which it to the unwanted voltage breakdown, i. too abrupt Loading or unloading of the paint column comes, according to the invention by the relatively slow loading or unloading over the Damping resistor 14 and 13 is avoided.
  • the required Minimum distance is 100 kV and air as insulating medium typically of the order of 250-400 mm.
  • the contact points 10 and 12 may be useful as the respective adjacent hose sections interconnecting piggable metal or similar conductive elements Be formed material.
  • a metal fitting or a piggable fastener be that by a substantially hollow cylindrical metallic connection with the inner diameter the hose 5 is formed, on which on both sides e.g. desrepechend the construction described in DE 103 13 063 a piece of tubing with piggable and dead space free Transition mounted and secured with a union nut is.
  • FIG. 2 A modification of the embodiment described above is shown in Fig. 2, wherein denoted by 1 to 8 Elements with those of FIG. 1 match. Deviating from 1 but only one of the contact points 10 or 12 is provided, in the illustrated example, the contact point 12th at the second pig station 2. With E and A are the required Insulating distances referred to the pig stations.
  • the first damping resistor 13 ' is shown between switched this contact point and a switch 20, with which he is either grounded or over the second Damping resistor 14 'connected to the high voltage generator 4 can be.
  • she is at the shown switch position over the two resistors 13 'and 14' charged to high voltage.
  • FIG. 3 corresponds to that of FIG. 1 with respect to grounded Pig station 1 ', of the high voltage generator 4' on High voltage potential and with the atomizer 3 ' connected pig station 2 'and the two pig stations interconnecting and mutually insulating hose 5 ', through which the paint column 6' between the pigs 7 ' and 8 ', so that no further explanation is required.
  • the damping of the invention Loading or unloading of the paint column 6 'when approaching the each serving as a destination station pig station 1 'or 2' takes place but not connected externally to the line here Damping resistors as in Fig. 1, but by the the conduit forming tube 5 'itself, for this purpose electrically weakly conductive.
  • the electrical resistance of the tube 5 'at least at the End parts is dimensioned so that on the one hand as Isolierrange for electrical isolation between the two pig stations 1 'and 2', but on the other hand, the paint column 6 'at their approach to the pig destination station on their potential charges or discharges before a voltage breakdown occurs.
  • the charging or discharging according to the invention by the Hose takes place while the color column 6 'through the Isolierumblen A and E corresponding charging and discharging lines moved to the respective pig destination station.
  • the tube 5 ' may be like the tube 5 of the embodiment of Fig. 1 expedient the initially described multi-layer structure according to DE 102 39 516, wherein the mechanical and other requirements explained there to be met with piggable tubes.
  • Monitoring the pigs and / or the paint column during operation the tube is preferably transparent.
  • the possible should be completely insulating, but is according to the invention at least the inner surface contacting the conveyed medium of the hose to define the desired electrical Resistance conductive.
  • Appropriate educational opportunities of the resistance are e.g.
  • Fig. 4 The above-mentioned further possibility of switching of damping resistances between the pig stations and their Potential connection is shown in Fig. 4, in which the Elements 1 to 8 correspond to the embodiment of FIG. 1.
  • the resistor arrangement is here by the parallel connection of the external damping resistor 24 with a controlled Switch 25 is formed.
  • the damping resistance is in this embodiment by opening the switch 24th activated only during the time it is needed, so approaching the conductive medium to the pig destination station. In the remaining time, the damping resistance is through the switch 25 bridges, so that the high voltage generator 4 as in the other embodiments, especially in the Coating directly with the pig station 2 and the atomizer 3 is connected.
  • the switch 25 can be automatically switched e.g. by signals from (not shown) sensors are controlled in known manner, the positions of the paint column or the other conveyed between the pig conductive medium monitor and report.
EP04016358A 2003-07-23 2004-07-12 Procédé et dispositif de commande de potentiel d'un arangement de tuyauteries nettoyées par raclage Active EP1500435B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10333547 2003-07-23
DE10333547A DE10333547A1 (de) 2003-07-23 2003-07-23 Verfahren und Einrichtung zur Potentialsteuerung einer gemolchten Leitungsanordnung

Publications (3)

Publication Number Publication Date
EP1500435A2 true EP1500435A2 (fr) 2005-01-26
EP1500435A3 EP1500435A3 (fr) 2005-12-21
EP1500435B1 EP1500435B1 (fr) 2007-03-14

Family

ID=33483032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04016358A Active EP1500435B1 (fr) 2003-07-23 2004-07-12 Procédé et dispositif de commande de potentiel d'un arangement de tuyauteries nettoyées par raclage

Country Status (4)

Country Link
EP (1) EP1500435B1 (fr)
AT (1) ATE356672T1 (fr)
DE (2) DE10333547A1 (fr)
ES (1) ES2281720T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012001563A1 (de) 2012-01-27 2013-08-01 Dürr Systems GmbH Beschichtungsmittelleitung und entsprechendes Herstellungsverfahren
CN104066263A (zh) * 2013-03-20 2014-09-24 鸿富锦精密电子(天津)有限公司 静电枪
US10710108B2 (en) 2014-04-01 2020-07-14 Eisenmann Se Coating system and method for coating objects

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1108475A2 (fr) 1999-12-18 2001-06-20 Dürr Systems GmbH Installation de peinture
EP1172152A1 (fr) 2000-07-13 2002-01-16 Dürr Systems GmbH Système d'alimentation en peinture avec conduits raclables pour un appareil de revêtement électrostatique
EP1270083A1 (fr) 2001-06-29 2003-01-02 Dürr Systems GmbH Système et procédé pour alimenter un appareil de revêtement par des écouvillions
EP1314483A2 (fr) 2001-11-27 2003-05-28 Dürr Systems GmbH Procédé et système de distribution de doses de matériau de revêtement à un appareil de revêment
DE10239516A1 (de) 2002-08-28 2004-03-18 Dürr Systems GmbH Schlauch für die elektrostatische Beschichtung von Werkstücken
DE10313063A1 (de) 2002-09-11 2004-04-01 Dürr Systems GmbH Verbindungselement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1108475A2 (fr) 1999-12-18 2001-06-20 Dürr Systems GmbH Installation de peinture
EP1172152A1 (fr) 2000-07-13 2002-01-16 Dürr Systems GmbH Système d'alimentation en peinture avec conduits raclables pour un appareil de revêtement électrostatique
EP1270083A1 (fr) 2001-06-29 2003-01-02 Dürr Systems GmbH Système et procédé pour alimenter un appareil de revêtement par des écouvillions
EP1314483A2 (fr) 2001-11-27 2003-05-28 Dürr Systems GmbH Procédé et système de distribution de doses de matériau de revêtement à un appareil de revêment
DE10239516A1 (de) 2002-08-28 2004-03-18 Dürr Systems GmbH Schlauch für die elektrostatische Beschichtung von Werkstücken
DE10313063A1 (de) 2002-09-11 2004-04-01 Dürr Systems GmbH Verbindungselement

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012001563A1 (de) 2012-01-27 2013-08-01 Dürr Systems GmbH Beschichtungsmittelleitung und entsprechendes Herstellungsverfahren
WO2013110466A1 (fr) 2012-01-27 2013-08-01 Dürr Systems GmbH Cabine de peinture avec conduite de matériau de revêtement et procédure de fabrication correspondante de la conduite de matériau de revêtement
CN104136132A (zh) * 2012-01-27 2014-11-05 杜尔系统有限责任公司 具有涂覆剂管路的喷涂室以及所述涂覆剂管路的相应制造方法
RU2612715C2 (ru) * 2012-01-27 2017-03-13 Дюрр Системз Гмбх Покрасочная кабина с трубопроводом для покровного средства и соответствующий способ изготовления трубопровода для покровного средства
US10137463B2 (en) 2012-01-27 2018-11-27 Durr Systems Gmbh Coating agent line with grounding element
DE102012001563B4 (de) 2012-01-27 2019-05-09 Dürr Systems Ag Lackierkabine mit einer Beschichtungsmittelleitung und entsprechendes Herstellungsverfahren für die Beschichtungsmittelleitung
CN104066263A (zh) * 2013-03-20 2014-09-24 鸿富锦精密电子(天津)有限公司 静电枪
EP2781267A1 (fr) * 2013-03-20 2014-09-24 Hongfujin Precision Electronics (Tianjin) Co., Ltd. Pistolet électrostatique et procédé de mise à la terre d'un pistolet électrostatique après déchargement des charges statiques
US10710108B2 (en) 2014-04-01 2020-07-14 Eisenmann Se Coating system and method for coating objects

Also Published As

Publication number Publication date
ES2281720T3 (es) 2007-10-01
EP1500435A3 (fr) 2005-12-21
DE502004003193D1 (de) 2007-04-26
EP1500435B1 (fr) 2007-03-14
ATE356672T1 (de) 2007-04-15
DE10333547A1 (de) 2005-02-10

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