EP1045732A1 - Device for isolating an electro-conductive flowing medium - Google Patents
Device for isolating an electro-conductive flowing mediumInfo
- Publication number
- EP1045732A1 EP1045732A1 EP98966550A EP98966550A EP1045732A1 EP 1045732 A1 EP1045732 A1 EP 1045732A1 EP 98966550 A EP98966550 A EP 98966550A EP 98966550 A EP98966550 A EP 98966550A EP 1045732 A1 EP1045732 A1 EP 1045732A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrically conductive
- potential
- flow path
- nozzle needle
- closure piece
- 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
Links
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 238000003032 molecular docking Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 18
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 239000003973 paint Substances 0.000 description 18
- 238000002955 isolation Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 238000010422 painting Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 3
- 239000004922 lacquer Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B05B5/1658—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
- 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
Definitions
- the invention relates to a method and a device for isolating points of an electrically conductive flow medium with different electrical potential along its flow path according to the preambles of claims 1 and £ > '..
- the invention is therefore based on the object of providing measures by means of which a particularly expedient handling and safe insulation of points of the flow path and / or of the electrically conductive flow medium located at different electrical potentials is possible.
- the invention provides the features of the characterizing part of claim 1.
- electrically conductive liquid does not come into contact with walls that come into contact, so that there is also little risk that the clocked surfaces forming film of electrically conductive liquid finally leads to a short circuit.
- the potential isolation valve serving as the potential isolation device also preferably has an electrically insulating liquid in its chamber receiving the lance or nozzle needle.
- the potential isolating valve comprises end pieces for the flow path which can be connected and detached according to the invention, these end pieces being at the same time in the electrically insulating liquid. It is therefore possible to provide a high-quality potential isolating device of small size, which can be easily and conveniently handled with a high switching speed.
- Fig. 1 in section a potential isolating device in the open state
- Fig. 2 a section as in Fig. 1 shortly before closing the flow path
- a potential isolating device connected as a potential isolating valve 1 comprises a multi-part housing 2, which mainly consists of an insulating material. It comprises a centrally arranged, cylindrical housing part 3 as well as covers 6, 7, which close its interior and have ends 5 on each end side.
- the housing 2 there are intermediate walls 8 and 9 which are arranged at a distance from one another and at a distance from the covers 6 and 7 -
- the 8 and 9 form chambers 10, 11 and 12 on the one hand in the interior of the housing 2 and also serve for the storage and guidance of components, with the aid of which a flow medium from a first point 13 of a flow path 1 to a second point 15 with a depending on the electrical switching state other electrical potential can flow.
- the components therefore serve to connect and interrupt the flow path 14 of the electrically conductive flow medium.
- the component forming the first point 13 is the free end 16 of a nozzle needle 17.
- the nozzle needle 17 has a longitudinal channel 18 and is connected, for example, to a line having a low electrical potential. Accordingly, the flow medium located in the nozzle needle 17 also has a low electrical potential.
- a drive 19 is assigned to the nozzle needle 17, with the aid of which the nozzle needle 17 is relative to the second position. le of this drive 15 is movable to be joined "or one another to be dissolved components. 19 includes pistons 20 and 21 via terminals 22 and 23 are acted upon in such a way that the nozzle needle is movable in at least two directions 17, such as from the Fig. 1. Compressed air supplied via lines 27 and 27a serves as the pressure medium.
- the free end 16 of the nozzle needle 17 (FIG. 1) is located in the middle chamber 11, which is always filled with insulating liquid, and, according to the exemplary embodiment, is closed at the end.
- the flow path 1 or the longitudinal channel 18 ends in the nozzle needle 17 at at least one radially directed outlet opening 29, as can be seen in particular from the illustration of FIG. 3 shown on a larger scale.
- An annular channel 30 is assigned to the or the radially directed outlet openings 29 and forms a housing-side receiving opening and leads to an outwardly directed outlet opening 31.
- the annular channel 30 is located in the intermediate wall 8 and is arranged there in such a way that it is open when the potential isolation valve is open 1 is covered by a closure piece 32 according to FIG. 1.
- This closure piece 32 can be moved relative to the nozzle needle 17 and is arranged in its axis and is acted upon, for example, by the pressure force of a spring 33 in the closing direction (FIGS. 1 and 2).
- the closure piece 32 On its end face facing the nozzle needle 17, the closure piece 32 has a recess 34, into which a centering piece 35 at the free end 16 of the nozzle needle 17 initially engages when the potential-isolation valve 1 is closed, as is shown in FIG. 2. Then, when the nozzle needle 17 is moved from the position shown in FIG. 2 even further in the axial direction towards the cover 6, the closure piece 32 moves into that in FIG. 3 shown position to the left until it releases the ring channel 30. At the same time, the outlet openings 29 of the longitudinal channel 18 of the nozzle needle 17 move from the position in FIG. 2 to the left until they are in front of the ring channel 30 (FIG. 3).
- the outlet openings 29 are covered by a sleeve 50 arranged axially displaceably on the nozzle needle 17.
- This sleeve 50 is acted upon by a compression spring 51 and also has a stop 52.
- the stop 52 encounters a resistance, so that the sleeve 50 can no longer move in the axial direction to the left despite a further movement of the nozzle needle 17 (FIG. 3) and the outlet opening 29 releases.
- the flow medium or the electrically conductive liquid can flow through the nozzle needle 17 to the housing-side outlet opening 31, the nozzle needle 17 forming an end piece of the flow path 1, while the second end piece of the flow path 14 is arranged on the housing side.
- the nozzle needle 17 is a hollow valve needle or a freely projecting carrier 17 ', in the interior 18' of which the electrically conductive flow medium flows.
- This carrier 17 ' moves itself between a first or separation position and a docking position according to FIG. 3, in which the electrically conductive liquid can flow. Basically, the carrier 17 'also moves back again as soon as the overflow process has ended.
- the Austrittsöf openings 29 at the free end of the carrier 17 ' are only open in the docking position and otherwise with the sleeve 50 serving as a closure piece on the side of the movable nozzle needle 17th closed.
- the ring channel 30 arranged on the housing side is always closed with the aid of the closure piece 32 when the nozzle needle 17 is in the disconnected position and is only open when the nozzle needle 17 has reached the docking position.
- the main consequence of this is that the electrically conductive liquid flows without contact with boundary walls which move relative to one another when the potential isolating device is opened and closed.
- the flow path 14 is formed on the housing side by the annular channel 30 and the associated outlet opening 31, it also being understood that the direction of flow for the electrically conductive flow medium can also be opposite.
- a piston 3 located in the chamber 10 is also assigned to the closure piece 32 and is supplied with a pressure medium via a line 37.
- sealing elements 40 are also required for all pistons and the closure piece 32 and between the covers 6, 7 and the various built-in parts and for sealing the nozzle needle 17 and are shown in the figures.
- a sealing element 41 arranged on the end face of the sleeve 50, 3, which rests on the facing end face of the centering piece 35 after leaving the docking position according to FIG. 3.
- two sealing elements 42 and 4-3 arranged at a distance from one another encompass the sleeve 50 in the docked state.
- the sealing element 4-2 on the ring channel side also serves as a wiping element and an annular channel 44 located in the intermediate wall 8 between the two sealing elements and 43 leads to the above-mentioned line 28 and the connection 25.
- Any electrically conductive liquid which has been introduced should collect here and through which Connection 25 are derived.
- the invention essentially consists of a potential isolation valve which can be arranged between an earthed paint supply line and a working container or between the working container and an atomizer connected to high voltage.
- the potential-isolation valve designed as a hollow needle valve comprises a paint supply lance which, for example, is located at ground potential with exclusion of air in the chamber filled with the liquid insulating medium and can be displaced at a short distance from a docking station optionally at high voltage or ground potential and is preferably pneumatically actuated Feed device can be inserted into the docking station.
- the docking station in turn forms a valve that keeps the path to a downstream work container closed as long as the paint supply lance is not docked and opens when the lance is docked in such a way that the paint material present in the hollow needle valve is reliably protected from the surrounding insulating medium.
- the docking station encloses the inserted hollow needle valve in an airtight and liquid-tight manner, the hollow needle valve only opening when docked and enclosed by an outer sleeve of the docking station.
- the piston carrying the paint supply lance / nozzle needle 17 also cleans the interior wall of the chamber receiving it from deposits during its movements.
- the piston therefore simultaneously serves as a circulation pump for the insulating medium during its docking and undocking movement.
- the longitudinal channel 18 in the nozzle needle 17 is the interior 18 'of a freely projecting carrier 17' which can be moved from a separation position into a docking position so that the electrically conductive liquid can then flow over it.
- the annular channel 30 serves as the take-over opening on the housing side and is only opened in the docking position, just as this applies to the outlet opening 29 on the freely projecting carrier 17 ′ or on the nozzle needle 17.
- the various parts are manufactured from generally known materials, some of which also use insulating materials.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19756488A DE19756488A1 (en) | 1997-12-18 | 1997-12-18 | Method and device for isolating an electrically conductive flow medium |
DE19756488 | 1997-12-18 | ||
PCT/DE1998/003693 WO1999032231A1 (en) | 1997-12-18 | 1998-12-15 | Method and device for isolating an electro-conductive flowing medium |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1045732A1 true EP1045732A1 (en) | 2000-10-25 |
EP1045732B1 EP1045732B1 (en) | 2003-11-05 |
Family
ID=7852509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98966550A Expired - Lifetime EP1045732B1 (en) | 1997-12-18 | 1998-12-15 | Device for isolating an electro-conductive flowing medium |
Country Status (4)
Country | Link |
---|---|
US (1) | US6422491B1 (en) |
EP (1) | EP1045732B1 (en) |
DE (2) | DE19756488A1 (en) |
WO (1) | WO1999032231A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10049541B4 (en) * | 2000-10-06 | 2006-10-26 | LacTec Gesellschaft für moderne Lackiertechnik GmbH | Method and apparatus for dispensing a metered liquid stream |
DE10059041C2 (en) | 2000-11-28 | 2002-11-14 | Lactec Ges Fuer Moderne Lackte | Method and device for conveying electrically conductive paints between different voltage potentials |
DE10211244A1 (en) | 2002-03-13 | 2003-10-23 | Lactec Ges Fuer Moderne Lackte | Painting system for applying liquid coating material |
DE102007023931A1 (en) | 2007-05-23 | 2008-12-04 | Dürr Systems GmbH | Piston rod seal for an insulation cylinder of a coating plant |
JP4347372B2 (en) * | 2007-08-10 | 2009-10-21 | トヨタ自動車株式会社 | Electrostatic coating equipment |
EP2595757B1 (en) | 2010-07-21 | 2017-11-01 | Valspar Sourcing, Inc. | Electrostatic spray apparatus and method |
EP2581136A1 (en) | 2011-10-12 | 2013-04-17 | LacTec GmbH | Transport device for liquids and varnishing assembly |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL187613C (en) | 1978-01-11 | 1991-12-02 | Akzo Nv | DEVICE FOR ELECTROSTATIC SPRAYING OF ELECTRICALLY CONDUCTIVE PAINT. |
US4313475B1 (en) | 1980-06-26 | 1994-07-12 | Nordson Corp | Voltage block system for electrostatic coating with conductive materials |
SE449451B (en) | 1986-03-24 | 1987-05-04 | Leif Tilly | SET AND DEVICE TO SUPPLY AN ELECTRIC CONDUCTIVE, LIQUID MEDIUM FROM A STOCK SYSTEM TO A CONSUMER STATION |
FR2654365B1 (en) | 1989-11-14 | 1992-02-21 | Sames Sa | INSTALLATION OF APPLICATION OF CONDUCTIVE COATING PRODUCT, ELECTROSTATICALLY. |
FR2656460B1 (en) | 1989-12-22 | 1994-02-11 | Sames Sa | ELECTRICAL ISOLATION DEVICE FORMING A CONDUIT ELEMENT AND INSTALLATION COMPRISING SUCH A DEVICE. |
DE4013941A1 (en) | 1990-04-30 | 1991-10-31 | Behr Industrieanlagen | PLANT FOR SERIES COATING OF WORKPIECES WITH CONDUCTIVE COATING MATERIAL |
DE4013938A1 (en) | 1990-04-30 | 1991-10-31 | Behr Industrieanlagen | METHOD AND SYSTEM FOR SERIES COATING OF WORKPIECES WITH CONDUCTIVE COATING MATERIAL |
DE4013940A1 (en) | 1990-04-30 | 1991-10-31 | Behr Industrieanlagen | METHOD AND SYSTEM FOR SERIES COATING OF WORKPIECES WITH CONDUCTIVE COATING MATERIAL |
US5197676A (en) | 1990-07-18 | 1993-03-30 | Nordson Corporation | Apparatus for dispensing conductive coating materials |
FR2695327B1 (en) | 1992-09-09 | 1995-07-07 | Sames Sa | Device for electrostatic projection of electrically conductive coating product, provided with an insulated reservoir adapted to contain such a product. |
US5364035A (en) | 1993-12-20 | 1994-11-15 | Graco Inc. | High voltage sealing and isolation via dynamic seals |
US5632816A (en) * | 1994-07-12 | 1997-05-27 | Ransburg Corporation | Voltage block |
US5526986A (en) * | 1994-11-01 | 1996-06-18 | Graco Inc | Waterbase voltage block and paint valve |
DE4444671A1 (en) * | 1994-12-15 | 1996-06-20 | Abb Patent Gmbh | Paint feed pump |
DE19620577A1 (en) * | 1996-05-22 | 1997-11-27 | Abb Research Ltd | Piston valve |
-
1997
- 1997-12-18 DE DE19756488A patent/DE19756488A1/en not_active Withdrawn
-
1998
- 1998-12-15 DE DE59810110T patent/DE59810110D1/en not_active Expired - Lifetime
- 1998-12-15 WO PCT/DE1998/003693 patent/WO1999032231A1/en active IP Right Grant
- 1998-12-15 EP EP98966550A patent/EP1045732B1/en not_active Expired - Lifetime
- 1998-12-15 US US09/581,730 patent/US6422491B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9932231A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19756488A1 (en) | 1999-07-01 |
DE59810110D1 (en) | 2003-12-11 |
EP1045732B1 (en) | 2003-11-05 |
US6422491B1 (en) | 2002-07-23 |
WO1999032231A1 (en) | 1999-07-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69109949T3 (en) | Improvements in or related to electrostatic insulation and pumping of electrically conductive coating materials. | |
DE3130096C2 (en) | ||
DE69001744T2 (en) | System for the electrostatic application of a conductive coating product. | |
DE69228249T2 (en) | METHOD AND SYSTEM FOR THE TRANSFER OF LIQUID USING A CONTACT-FREE SENSOR | |
DE69332680T2 (en) | Process for dispensing conductive coating materials | |
EP1108475A2 (en) | Painting installation | |
DE112010003094T5 (en) | Electrostatic coating device for electrically conductive coating material | |
EP1172152A1 (en) | Paint supply system with piggable supply lines for an electrostatic coating device | |
EP1344572B1 (en) | Painting installation for coating pieces with a liquid material | |
DE60302702T2 (en) | Method and device for paint supply of an applicator device and to the rinsing | |
EP1045732A1 (en) | Device for isolating an electro-conductive flowing medium | |
EP1108474B1 (en) | Painting installation | |
DD270665A5 (en) | METHOD AND APPARATUS FOR ELECTROSTATIC COATING IN THE CONDUCTIVE MATERIAL | |
DE10131562A1 (en) | Method and system for supplying a coating device | |
DE19640015C2 (en) | Device for the electrostatic spray coating of a workpiece | |
EP1523384A1 (en) | Method for supplying a paint application device with paint | |
EP0541745B1 (en) | Spray coating device | |
EP3414017B1 (en) | Insulation device and coating system comprising said insulation device | |
EP2269741B1 (en) | Piston metering apparatus for fluids and system for coating objects | |
DE202006021283U1 (en) | Coating material supply device | |
EP3012028B1 (en) | Piston dosing feeder for fluid media and system for coating objects | |
EP2678114B1 (en) | Piston metering pump for fluid media | |
DE102022121063A1 (en) | Device comprising an applicator with a media tank for holding a medium to be applied and a charging station | |
EP2581136A1 (en) | Transport device for liquids and varnishing assembly | |
EP3222361A1 (en) | Device for electrostatically isolating a dispensing head from a paint supply device |
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 |
|
17P | Request for examination filed |
Effective date: 20000628 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE FR GB |
|
17Q | First examination report despatched |
Effective date: 20020718 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
RTI1 | Title (correction) |
Free format text: DEVICE FOR ISOLATING AN ELECTRO-CONDUCTIVE FLOWING MEDIUM |
|
RTI1 | Title (correction) |
Free format text: DEVICE FOR ISOLATING AN ELECTRO-CONDUCTIVE FLOWING MEDIUM |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE FR GB |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REF | Corresponds to: |
Ref document number: 59810110 Country of ref document: DE Date of ref document: 20031211 Kind code of ref document: P |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031231 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20040217 |
|
BERE | Be: lapsed |
Owner name: *LACTEC G.- FUR MODERNE LACKIERTECHNIK M.B.H. Effective date: 20031231 |
|
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 |
Effective date: 20040806 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20101221 Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20120103 Year of fee payment: 14 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20121215 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20130830 |
|
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: 20130102 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20121215 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20171219 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 59810110 Country of ref document: DE |