EP3077123B1 - High rotation atomiser functioning with internal charging - Google Patents

High rotation atomiser functioning with internal charging Download PDF

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Publication number
EP3077123B1
EP3077123B1 EP14803044.8A EP14803044A EP3077123B1 EP 3077123 B1 EP3077123 B1 EP 3077123B1 EP 14803044 A EP14803044 A EP 14803044A EP 3077123 B1 EP3077123 B1 EP 3077123B1
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EP
European Patent Office
Prior art keywords
voltage
turbine housing
turbine
measuring
interference signal
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.)
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Application number
EP14803044.8A
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German (de)
French (fr)
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EP3077123A1 (en
Inventor
Jörg Pfau
Jan Reichler
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.)
Eisenmann SE
Original Assignee
Eisenmann SE
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Publication of EP3077123A1 publication Critical patent/EP3077123A1/en
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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
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—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
    • 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
    • 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
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
    • B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
    • 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
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0415—Driving means; Parts thereof, e.g. turbine, shaft, bearings
    • 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 known high-rotation atomizers of the type mentioned in their high-voltage circuit have the above-mentioned measuring resistor.
  • the first measuring voltage dropping across it is used to control the high voltage.
  • the first measuring voltage is used to determine the residual high voltage, which is still on the turbine housing, so as a security measure.
  • This safety measure is generally highly effective; in general, however, there is a need to further reduce the risk potential emanating from a high-speed rotary atomizer.
  • a redundant monitoring of the voltage lying on the turbine housing and on all the electrically conductive components electrically connected therewith is thus provided which is independent of the already existing high-voltage circuit. If an excessively high deviation from the information obtained in the first measuring channel about the voltage on the turbine housing is detected in this second measuring channel, an interference signal is emitted immediately.
  • This redundant measure can significantly increase the safety of the operating personnel and the entire system.
  • the interference signal of the control device is preferably an optical or acoustic error signal can be triggered.
  • the operator is immediately alerted to the presence of a hazard so that it can move away from the danger area and / or take other suitable measures.
  • the voltage supply to the high-voltage circuit can be switched off by the interference signal of the control device. This measure significantly reduces the risk posed by a faulty high-speed rotary atomizer.
  • the safety function of a higher-level system control can be activated by the interference signal of the control device.
  • “superordinate” system control that control is understood which monitors and controls the entire coating process effected with the high-rotation atomizer. These include, for example, the security measures at the doors, which allow access to the rooms, where the high-speed atomizer works.
  • the high voltage circuit 3 contains, as well corresponds to the prior art, a measuring resistor 14. This is indicated only schematically in the drawing. One terminal of this measuring resistor 14 is connected via a line 9 to ground, the other via a line 8 to the turbine housing 7. The falling on the measuring resistor 14 first measuring voltage is determined by a likewise provided in the high-voltage circuit 3 monitoring circuit. After this first measuring voltage, the high voltage applied to the bell cup 6 is regulated during operation. After switching off the high-voltage circuit 3, further measures are triggered when a certain value of this first measuring voltage is exceeded. These processes are known in the art and therefore need not be described in detail here.
  • a control device 13 is supplied with both the first and the second measuring voltage. It compares the information obtained via two measuring channels with each other. If these deviate from each other in the result beyond a certain maximum value, this means that an error exists in one of the two measuring channels. In this case, an interference signal is generated, which warns the operator and causes it to take appropriate measures. In addition, the high voltage can be switched off automatically.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)

Description

Die Erfindung betrifft einen mit Innenaufladung arbeitenden Hochrotationszerstäuber mit

  1. a) einem Außengehäuse;
  2. b) einem drehbar gelagerten Glockenteller;
  3. c) einer in einem Turbinengehäuse angeordneten Turbine, welche den Glockenteller in Drehung versetzt;
  4. d) einer Hochspannungschaltung, welcher eine niedrige Spannung zuführbar ist und die an einem Ausgang, der mit dem Glockenteller, der Turbine und dem Turbinengehäuse elektrisch verbunden ist, eine Hochspannung erzeugt und umfasst:
    • da) eine Hochspannungskaskade;
    • db) einen Messwiderstand, der in einem zwischen dem Turbinengehäuse und Masse liegenden Strompfad liegt und an dem eine erste Messspannung abgreifbar ist, die ein Maß für die am Turbinengehäuse liegende Spannung ist.
The invention relates to a working with internal charging high-rotation atomizer
  1. a) an outer housing;
  2. b) a rotatably mounted bell plate;
  3. c) a turbine disposed in a turbine housing, which sets the bell cup in rotation;
  4. d) a high voltage circuit to which a low voltage can be supplied and which generates a high voltage at an output which is electrically connected to the bell cup, the turbine and the turbine housing, and comprises:
    • da) a high voltage cascade;
    • db) a measuring resistor which lies in a current path lying between the turbine housing and ground and to which a first measuring voltage can be tapped, which is a measure of the voltage applied to the turbine housing.

Praktisch alle auf dem Markt befindlichen, derzeit bekannten Hochrotationszerstäuber, die mit Innenaufladung arbeiten, besitzen diese Bauweise, so dass ein druckschriftlicher Nachweis entbehrlich ist. Hochrotationszerstäuber weisen aufgrund der in ihnen vorliegenden Hochspannung ein gewisses Gefahrenpotential auf und müssen daher sorgfältig überwacht werden. Eine Gefahr kann beispielsweise darin bestehen, dass sich das Turbinengehäuse, welches im Betrieb auf der hohen Spannung liegt, nach dem Abschalten der Hochspannungsschaltung nicht rasch und/ oder vollständig genug entlädt, sodass noch eine potentiell gefährliche Hochspannung an ihm verbleibt.Virtually all present on the market, currently known Hochrotationszerstäuber that work with internal charging, have this design, so that a printed documentary proof is unnecessary. Hochrotationszerstäuber have due to the high voltage present in them a certain risk potential and must therefore be carefully monitored. For example, a hazard may be that the turbine housing, which is at high voltage during operation, does not discharge rapidly and / or completely enough after the high voltage circuit is turned off, leaving a potentially dangerous high voltage on it.

Aus diesem Grunde besitzen die bekannten Hochrotationszerstäuber der eingangs genannten Art in ihrer Hochspannungsschaltung den oben genannten Messwiderstand. Im Betrieb, also bei eingeschalteter Hochspannungsschaltung, wird die an ihm abfallende erste Messspannung zur Regelung der Hochspannung genutzt. Nach dem Abschalten der Hochspannungsschaltung dient die erste Messpannung zur Feststellung der Rest-Hochspannung, die noch am Turbinengehäuse liegt, also als Sicherheitsmassnahme.For this reason, the known high-rotation atomizers of the type mentioned in their high-voltage circuit have the above-mentioned measuring resistor. During operation, ie when the high-voltage circuit is switched on, the first measuring voltage dropping across it is used to control the high voltage. After switching off the high voltage circuit, the first measuring voltage is used to determine the residual high voltage, which is still on the turbine housing, so as a security measure.

Diese Sicherheitsmassnahme ist zwar im Allgemeinen hoch wirksam; generell besteht jedoch das Bedürfnis, das Risikopotential, das von einem Hochrotationszerstäuber ausgeht, weiter zu reduzieren.This safety measure is generally highly effective; in general, however, there is a need to further reduce the risk potential emanating from a high-speed rotary atomizer.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass

  • e) ein weiterer Messwiderstand vorgesehen ist, der ebenfalls in einem vom Turbinengehäuse zur Masse führenden Strompfad liegt und an dem eine zweite Messspannung abgreifbar ist, welche ein Maß für die am Turbinengehäuse liegenden Spannung ist;
  • f) eine Steuereinrichtung vorgesehen ist, welcher die beiden Messspannungen zuführbar sind und die bei Überschreiten eines Maximalwerts der Differenz dieser Messspannungen ein Störsignal abgibt.
This object is achieved in that
  • e) a further measuring resistor is provided, which also lies in a current path leading from the turbine housing to the ground and to which a second measuring voltage can be tapped, which is a measure of the voltage applied to the turbine housing voltage;
  • f) a control device is provided, to which the two measuring voltages can be fed and which emits an interference signal when a maximum value of the difference of these measuring voltages is exceeded.

Erfindungsgemäß wird also eine redundante Überwachung der am Turbinengehäuse und an allen mit diesem elektrisch verbundenen, elektrisch leitenden Bauteilen liegenden Spannung geschaffen, die unabhängig von der bereits vorhandenen Hochspannungsschaltung ist. Wird in diesem zweiten Messkanal eine zu hohe Abweichung von der im ersten Messkanal gewonnenen Information über die Spannung am Turbinengehäuse festgestellt, wird sofort ein Störsignal abgegeben. Durch diese redundante Maßnahme lässt sich die Sicherheit des Bedienungspersonales und der gesamten Anlage erheblich erhöhen.In accordance with the invention, a redundant monitoring of the voltage lying on the turbine housing and on all the electrically conductive components electrically connected therewith is thus provided which is independent of the already existing high-voltage circuit. If an excessively high deviation from the information obtained in the first measuring channel about the voltage on the turbine housing is detected in this second measuring channel, an interference signal is emitted immediately. This redundant measure can significantly increase the safety of the operating personnel and the entire system.

Durch das Störsignal der Steuereinrichtung ist vorzugsweise ein optisches oder akustisches Fehlersignal auslösbar. Hierdurch wird das Bedienungspersonal unverzüglich auf das Vorliegen einer Gefahr aufmerksam gemacht, so dass dieses sich aus dem Gefahrenbereich entfernen und/oder andere geeignet Massnahmen ergreifen kann.By the interference signal of the control device is preferably an optical or acoustic error signal can be triggered. As a result, the operator is immediately alerted to the presence of a hazard so that it can move away from the danger area and / or take other suitable measures.

Zweckmäßig ist ferner, wenn durch das Störsignal der Steuereinrichtung die Spannungszufuhr zur Hochspannungsschaltung abschaltbar ist. Diese Maßnahme reduziert die von einem fehlerhaften Hochrotationszerstäuber ausgehende Gefahr erheblich.It is also expedient if the voltage supply to the high-voltage circuit can be switched off by the interference signal of the control device. This measure significantly reduces the risk posed by a faulty high-speed rotary atomizer.

Schließlich ist es möglich, dass durch das Störsignal der Steuereinrichtung die Sicherheitsfunktion einer übergeordneten Anlagensteuerung aktivierbar ist. Unter "übergeordneter" Anlagensteuerung wird diejenige Steuerung verstanden, welche den gesamten mit dem Hochrotationszerstäuber bewirkten Beschichtungsvorgang überwacht und regelt. Hierzu gehören beispielsweise die Sicherheitsvorkehrungen an den Türen, welche den Zugang zu den Räumen ermöglichen, in denen der Hochrotationszerstäuber arbeitet.Finally, it is possible that the safety function of a higher-level system control can be activated by the interference signal of the control device. By "superordinate" system control, that control is understood which monitors and controls the entire coating process effected with the high-rotation atomizer. These include, for example, the security measures at the doors, which allow access to the rooms, where the high-speed atomizer works.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert; die einzige Figur zeigt schematisch im Schnitt den Kopfbereich eines Hochrotationszerstäubers.An embodiment of the invention will be explained in more detail with reference to the drawing; the single figure shows schematically in section the head portion of a high rotation atomizer.

Der insgesamt mit dem Bezugszeichen 1 gekennzeichnete Hochrotationszerstäuber besitzt ein Außengehäuse 2, in dem die nachfolgend beschriebenen Elemente untergebracht sind:

  • Mit dem Bezugszeichen 3 ist eine Hochspannungschaltung bezeichnet, wie sie grundsätzlich aus dem Stande der Technik bekannt ist. Diese erzeugt mit Hilfe einer schematisch dargestellten Hochspannungskaskade 15 aus einer niedrigen, mittelfrequenten Wechselspannung, beispielsweise 24 bis 36 V und 35 kHz, die ihr über die Leitung 4 zugeführt wird, eine Hochspannung, wie sie zum Betrieb eines Hochrotationszerstäubers erforderlich ist. Diese wird über eine Leitung 5 an einen Glockenteller 6 gelegt. Der Glockenteller 6 wird in bekannter Weise von einer Turbine in Drehung versetzt, die in einem in der Zeichnung erkennbaren Turbinengehäuse 7 gelagert ist. Bei mit Innenaufladung arbeitenden Hochrotationszerstäubern liegt dieselbe Hochspannung im Betrieb an der Turbine und am Turbinengehäuse 7.
The Hochrotationszerstäuber designated overall by the reference numeral 1 has an outer housing 2, in which the elements described below are housed:
  • The reference numeral 3 designates a high voltage circuit, as it is known in principle from the prior art. This generated by means of a high-voltage cascade 15 shown schematically from a low, medium-frequency AC voltage, for example 24 to 36 V and 35 kHz, which is fed via the line 4, a high voltage, as required for the operation of a high-rotation atomizer. This is placed via a line 5 to a bell plate 6. The bell cup 6 is rotated in a known manner by a turbine, which is mounted in a recognizable in the drawing turbine housing 7. When working with internal high-speed rotary atomizers the same high voltage is in operation at the turbine and the turbine housing. 7

Nicht dargestellt sind die pneumatischen Leitungen, die zum Betrieb der Turbine erforderlich sind, sowie die Leitung, über welche die zu versprühende Farbe dem Glockenteller 6 zugespeist wird. Diese Leitungen sind dem Fachmann bekannt.Not shown are the pneumatic lines that are required to operate the turbine, as well as the line through which the color to be sprayed is fed to the bell cup 6. These lines are known in the art.

Die Hochspannungschaltung 3 enthält, wie dies ebenfalls dem Stande der Technik entspricht, einen Messwiderstand 14. Dieser ist in der Zeichnung nur schematisch angedeutet. Ein Anschluss dieses Messwiderstandes 14 ist über eine Leitung 9 mit Masse verbunden, der andere über eine Leitung 8 mit dem Turbinengehäuse 7. Die am Messwiderstand 14 abfallende erste Messspannung wird durch eine ebenfalls in der Hochspannungsschaltung 3 vorgesehene Überwachungsschaltung ermittelt. Nach dieser ersten Messpannung wird im Betrieb die an den Glockenteller 6 gelegte Hochspannung geregelt. Nach dem Abschalten der Hochspannungsschaltung 3 werden bei Überschreiten eines bestimmten Wertes dieser ersten Messspannung weitere Maßnahmen auslöst. Auch diese Vorgänge sind dem Fachmann bekannt und brauchen daher hier nicht näher beschrieben zu werden.The high voltage circuit 3 contains, as well corresponds to the prior art, a measuring resistor 14. This is indicated only schematically in the drawing. One terminal of this measuring resistor 14 is connected via a line 9 to ground, the other via a line 8 to the turbine housing 7. The falling on the measuring resistor 14 first measuring voltage is determined by a likewise provided in the high-voltage circuit 3 monitoring circuit. After this first measuring voltage, the high voltage applied to the bell cup 6 is regulated during operation. After switching off the high-voltage circuit 3, further measures are triggered when a certain value of this first measuring voltage is exceeded. These processes are known in the art and therefore need not be described in detail here.

Nicht beim Stande der Technik vorhanden dagegen ist ein zweiter Messwiderstand 10, der an einem Anschluss ebenfalls mit dem Turbinengehäuse 7 über eine Leitung 11 und an dem anderen Anschluss über eine Leitung 12 mit Masse verbunden ist. Die an dem zweiten Messwiderstand 10 abfallende zweite Messspannung ist daher ebenfalls ein Maß für die Spannung, die am Turbinengehäuse 7 liegt.On the other hand, there is no second measuring resistor 10 which is connected to the turbine housing 7 via a line 11 at one connection and to ground via a line 12 at the other connection. The falling at the second measuring resistor 10 second measuring voltage is therefore also a measure of the voltage, which is located on the turbine housing 7.

Einer Steuereinrichtung 13 werden sowohl die erste als auch die zweite Messspannung zugeführt. Sie vergleicht die über zwei Messkanäle gewonnenen Informationen miteinander. Weichen diese im Ergebnis über einen bestimmten Maximalwert hinaus voneinander ab, so bedeutet dies, dass ein Fehler in einem der beiden Messkanäle vorliegt. In diesem Falle wird ein Störsignal erzeugt, welches das Bedienungspersonal warnt und dieses zu geeigneten Massnahmen veranlasst. Ausserdem kann die Hochspannung automatisch abgeschaltet werden.A control device 13 is supplied with both the first and the second measuring voltage. It compares the information obtained via two measuring channels with each other. If these deviate from each other in the result beyond a certain maximum value, this means that an error exists in one of the two measuring channels. In this case, an interference signal is generated, which warns the operator and causes it to take appropriate measures. In addition, the high voltage can be switched off automatically.

Stellt die Steuereinrichtung 13 oder die Überwachungsschaltung in der Hochspannungsschaltung 3 einen zu hohen Wert der Spannung am Turbinengehäuse 7 fest, so gibt sie ebenfalls ein geeignetes Störsignal ab, mit dem im Wesentlichen dieselben Wirkungen verbunden sein können, wie oben beschrieben.Represents the controller 13 or the monitoring circuit In the high-voltage circuit 3, if the value of the voltage on the turbine housing 7 is too high, it also emits a suitable interference signal, to which substantially the same effects can be associated, as described above.

Claims (4)

  1. High-speed rotating atomizer operating with internal charging with:
    a) an outer housing (2);
    b) a rotatably mounted bell-cup (6);
    c) a turbine arranged in a turbine housing (7), which causes the bell-cup (6) to rotate;
    d) a high-voltage circuit (3), to which a low voltage can be supplied and which generates a high voltage at an output that has been electrically connected to the bell-cup (6), to the turbine and to the turbine housing (7), and comprises:
    da) a high-voltage cascade (15);
    db) a resistor (10) which is situated in a current path situated between the turbine housing (7) and ground and at which a first measuring voltage can be tapped which is a measure for the voltage at the turbine housing (7);
    characterised in that
    e) a further resistor (10) is provided which is likewise situated in a current path leading from the turbine housing (7) to ground and at which a second measuring voltage can be tapped which is a measure for the voltage at the turbine housing (7);
    f) a control device (13) is provided to which the two measuring voltages can be supplied and which emits an interference signal when a maximum value of the difference of these measuring voltages is exceeded.
  2. High-speed rotating atomizer according to Claim 1, characterised in that an optical or acoustic error signal can be triggered by the interference signal of the control device (13).
  3. High-speed rotating atomizer according to one of the preceding claims, characterised in that the supply of voltage to the high-voltage circuit (3) can be switched off by the interference signal of the control device (13).
  4. High-speed rotating atomizer according to one of the preceding claims, characterised in that the safety function of a superordinate system control (16) can be activated by the interference signal of the control device (13).
EP14803044.8A 2013-12-03 2014-11-13 High rotation atomiser functioning with internal charging Active EP3077123B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310022282 DE102013022282B3 (en) 2013-12-03 2013-12-03 With internal charging working high rotation atomizer
PCT/EP2014/003048 WO2015082040A1 (en) 2013-12-03 2014-11-13 High rotation atomizer functioning with internal charging

Publications (2)

Publication Number Publication Date
EP3077123A1 EP3077123A1 (en) 2016-10-12
EP3077123B1 true EP3077123B1 (en) 2017-11-01

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EP14803044.8A Active EP3077123B1 (en) 2013-12-03 2014-11-13 High rotation atomiser functioning with internal charging

Country Status (5)

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US (1) US10092916B2 (en)
EP (1) EP3077123B1 (en)
CN (1) CN105636706B (en)
DE (1) DE102013022282B3 (en)
WO (1) WO2015082040A1 (en)

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EP3810334A1 (en) * 2018-06-25 2021-04-28 BASF Coatings GmbH Method for determining the average filament length during a rotational atomization, and screening method based thereon during the development of a paint
FR3108046B1 (en) * 2020-03-11 2023-02-10 Exel Ind Sprayer, installation comprising such a sprayer and associated method

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Also Published As

Publication number Publication date
CN105636706A (en) 2016-06-01
CN105636706B (en) 2019-05-03
US20160303589A1 (en) 2016-10-20
EP3077123A1 (en) 2016-10-12
US10092916B2 (en) 2018-10-09
DE102013022282B3 (en) 2015-03-05
WO2015082040A1 (en) 2015-06-11

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