EP1525058A1 - Vorrichtung zur messung eines betriebsparameters einer beschichtungsanlage f r gegenst nde - Google Patents
Vorrichtung zur messung eines betriebsparameters einer beschichtungsanlage f r gegenst ndeInfo
- Publication number
- EP1525058A1 EP1525058A1 EP03783993A EP03783993A EP1525058A1 EP 1525058 A1 EP1525058 A1 EP 1525058A1 EP 03783993 A EP03783993 A EP 03783993A EP 03783993 A EP03783993 A EP 03783993A EP 1525058 A1 EP1525058 A1 EP 1525058A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hose
- operating parameter
- electrodes
- measuring
- application device
- 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
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
- B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
-
- 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
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
-
- 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
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
-
- 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
-
- 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
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/043—Discharge apparatus, e.g. electrostatic spray guns using induction-charging
Definitions
- the invention relates to a device for measuring an operating parameter of a coating system for objects, in particular a painting system, which has at least one application device containing a high-voltage electrode
- a measuring circuit which contains the sensor and generates an electrical signal corresponding to the monitored operating parameter
- Coating systems for objects which include in particular liquid or Powder coating, have like all modern technical equipment monitoring devices, with which at least one operating parameter of the system 'is monitored. Suitable electronics ensure that the system can be controlled or, if necessary, also switched off in accordance with the measured operating parameters.
- Devices of the type mentioned at the outset are characterized in that certain components, in particular the high-voltage electrode of the application device, at a very high potential, e.g. B. to 60 kV or above.
- a very high potential e.g. B. to 60 kV or above.
- the object of the present invention is to create a device of the type mentioned at the outset, with which operating parameters can also be measured, which have to be queried with the aid of a sensor on a component which is at least potentially electrically connected to the high-voltage electrode of the application device.
- the measuring circuit is fed by an internal, self-sufficient current source, in particular a battery;
- the measuring circuit is electrically isolated from the evaluation circuit by an electromagnetic radiation path.
- the measuring circuit is completely electrically isolated from its surroundings. To do this, it must first be provided with its own internal power source, for example a battery.
- the data obtained by the measuring circuit are carried out via a radiation path, for example a radio path, and fed to the evaluation circuit.
- the entire measuring circuit can, if necessary, lie on the high potential of the high-voltage electrode of the application device without the evaluation of the operating parameter being impaired thereby.
- a particularly preferred embodiment of the device according to the invention is characterized in that the component on which the sensor is arranged is a hose via which paint can be supplied to the application device, the sensor comprising at least two electrodes which are attached to or in the Hose are arranged at a distance from each other.
- a particularly important operating parameter that is monitored in this embodiment is the functional reliability of the hose, in particular its insulating ability.
- This hose namely electrically separates the application device from the paint supply. If the insulating effect of the hose is not sufficient, voltage flashovers can occur from the high-voltage electrode of the application device back to the paint supply.
- the sensor according to the invention comprising two electrodes, measures leakage currents on the hose, which are a measure of its electrical conductivity. This can change during operation of the coating system due to various circumstances, in particular due to aging processes or contamination. The detection of the leakage currents thus enables the user of the coating system to get an idea of the functional safety of the hose.
- two electrodes are arranged on the outer circumferential surface of the hose, this can in particular detect leakage currents which result from contamination on the outer surface of the hose. If two electrodes are embedded in the jacket of the hose, changes can be detected that are based on aging processes of the hose material.
- the embodiment of the invention is used as a safety device in which a maximum value for the permissible current flowing between the electrodes is stored in the evaluation circuit, the evaluation circuit switching off the high-voltage supply of the application device when the current actually flowing through the electrodes exceeds the maximum value.
- the reference numeral 1 designates a hose in which paint is transported with the help of a pig, not shown, from a supply source to an application device working with internal charging, for example a high-speed rotary atomizer.
- the supply source and the application device are not shown.
- the term “internal charging” means that the paint in the application device is guided past a high-voltage electrode, ionized there and then released in ionized form onto the object to be painted.
- the hose 1, which is made of an insulating plastic for this purpose must ensure potential isolation between the paint supply and the application device.
- the monitoring device shown in the drawing identified overall by reference number 2, is used.
- This comprises two electrodes 3, 4 which are spaced apart from one another in the jacket of the hose 1 or are applied to the jacket of the hose 1.
- These are connected to a measuring device 5 which contains a battery as the voltage source.
- the measuring device 5 applies a specific voltage to the two electrodes 3, 4 and measures the current flowing through the section of the hose 1 flowing between the electrodes 3, 4. This current is a direct measure of the insulating ability of the jacket of the hose 1 and can therefore be used as a control parameter for the functionality of the hose 1.
- the electrodes 3 and 4 Due to the connection between the measuring device 5 via the electrodes 3 and 4 with the hose 1 and the paint carried inside the hose 1, optionally provided with electrical particles, the electrodes 3 and 4 are connected, albeit with high resistance, to the high-voltage electrode in the application device ,
- the data obtained from the measuring device 5 can therefore not simply be carried out from the measuring device 5 by galvanic means.
- the measuring device 5 contains a transmitter for electromagnetic radiation, eg. B. a radio transmitter in a frequency range approved for commercial purposes, which continuously or periodically emits the information contained in the measured current signals. This is symbolized by the wavy arrow 6.
- the radiation 6 is received by a corresponding receiver 7, converted into an electrical signal and fed to an evaluation circuit 8.
- the size of the signal is compared in the evaluation circuit 8 with a permissible maximum value stored there. As long as the measured value remains below the maximum value, the operation of the application device via hose 1 can be continued. If this maximum value is exceeded, however, the evaluation electronics 8 automatically switch off the high voltage supply of the application device in connection with a warning signal.
- the electrodes 3, 4, between which the leakage current is measured are located inside or on the outer surface of the jacket of the hose 1. It is also possible to attach the electrodes 3 and 4 to the inner jacket surface of the hose 1. In this way, leakage currents can be measured and monitored, which are formed by deposits of the paint on the inner surface. These deposits can also affect the electrical safety of the question the entire system and lead to arcing between the application device and the power supply.
- the thickness of the deposits on the inner surface of the hose 1 is also a measure of the quality of the pig. Therefore, if the current measured between the electrodes 3, 4 on the inner circumferential surface of the hose 1 exceeds a certain value, this can mean that the pig is worn out and has to be replaced.
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Electrostatic Spraying Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10234247 | 2002-07-27 | ||
| DE10234247A DE10234247B4 (de) | 2002-07-27 | 2002-07-27 | Einrichtung zur Messung eines Betriebsparameters einer Beschichtungsanlage für Gegenstände |
| PCT/EP2003/006830 WO2004014564A1 (de) | 2002-07-27 | 2003-06-27 | Vorrichtung zur messung eines betriebsparameters einer beschichtungsanlage für gegenstände |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1525058A1 true EP1525058A1 (de) | 2005-04-27 |
| EP1525058B1 EP1525058B1 (de) | 2011-12-07 |
Family
ID=30010450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03783993A Expired - Lifetime EP1525058B1 (de) | 2002-07-27 | 2003-06-27 | Vorrichtung zur messung eines betriebsparameters einer beschichtungsanlage für gegenstände |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1525058B1 (de) |
| DE (1) | DE10234247B4 (de) |
| WO (1) | WO2004014564A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004037247B4 (de) | 2004-07-31 | 2006-04-27 | Eisenmann Lacktechnik Gmbh & Co. Kg | Versorgungseinheit für eine Applikationseinrichtung und Verfahren zum Betreiben einer solchen |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3894272A (en) * | 1974-01-14 | 1975-07-08 | Ransburg Corp | Method and apparatus for determining incipient grounding of a high voltage electrostatic system |
| DE3203934C1 (de) * | 1982-02-05 | 1983-05-05 | Siemens AG, 1000 Berlin und 8000 München | Grenzwertmelder zum Erfassen von Kriechströmen an unter Spannung stehenden Hochspannungsisolatoren oder von vagabundierenden Strömen in Oberflächen von Metallkörpern |
| US5060860A (en) * | 1989-08-18 | 1991-10-29 | Hughes Aircraft Company | Paint conductivity measurement system |
| US5073709A (en) * | 1991-04-09 | 1991-12-17 | Graco Inc. | Electrostatic spray applicator with two-channel optical monitoring system |
| US5660334A (en) * | 1995-01-13 | 1997-08-26 | Clark Equipment Company | Remote control for electrostatic sprayer elements |
| DE19738144C2 (de) * | 1997-09-01 | 1999-12-09 | Wagner International Ag Altsta | Verfahren zum Steuern eines elektrostatischen Beschichtungsgerätes und elektrostatische Beschichtungsanlage |
-
2002
- 2002-07-27 DE DE10234247A patent/DE10234247B4/de not_active Expired - Fee Related
-
2003
- 2003-06-27 EP EP03783993A patent/EP1525058B1/de not_active Expired - Lifetime
- 2003-06-27 WO PCT/EP2003/006830 patent/WO2004014564A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004014564A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10234247A1 (de) | 2004-02-05 |
| DE10234247B4 (de) | 2006-03-09 |
| EP1525058B1 (de) | 2011-12-07 |
| WO2004014564A1 (de) | 2004-02-19 |
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