EP0349475A2 - Installation for spraying lacquers or plastic powder - Google Patents

Installation for spraying lacquers or plastic powder Download PDF

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Publication number
EP0349475A2
EP0349475A2 EP89710059A EP89710059A EP0349475A2 EP 0349475 A2 EP0349475 A2 EP 0349475A2 EP 89710059 A EP89710059 A EP 89710059A EP 89710059 A EP89710059 A EP 89710059A EP 0349475 A2 EP0349475 A2 EP 0349475A2
Authority
EP
European Patent Office
Prior art keywords
fire
valve
spray gun
plastic powder
feed line
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.)
Withdrawn
Application number
EP89710059A
Other languages
German (de)
French (fr)
Other versions
EP0349475A3 (en
Inventor
Hans Julius Schaad
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.)
INTEC MASCHINENBAU GmbH
Original Assignee
INTEC MASCHINENBAU GmbH
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 INTEC MASCHINENBAU GmbH filed Critical INTEC MASCHINENBAU GmbH
Publication of EP0349475A2 publication Critical patent/EP0349475A2/en
Publication of EP0349475A3 publication Critical patent/EP0349475A3/en
Withdrawn legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
    • A62C37/44—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device only the sensor being in the danger zone
    • 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
    • B05B12/12—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 responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
    • 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

Definitions

  • the invention relates to a device for spraying paint or plastic powder, with a spray gun through which compressed air flows and a container for the material to be sprayed.
  • Powder spray guns have also become known in which only a small amount of halon is sprayed into the powder or paint cloud in the event of a fire. However, it is disadvantageous that there is no reliable extinguishing effect.
  • the method for operating such a device should be simple and reliable and only require a small outlay, with the risk of personal injury being excluded.
  • the drawing shows a powder or paint spray gun 2 with a feed line 4 for the material to be sprayed.
  • a shut-off valve 6 for the material to be sprayed is installed, which can suddenly shut off the material flow.
  • a pressure vessel 5 for a non-combustible gas is connected to the feed line 4 via a valve 8, which can also be switched quickly, the valve 8 either via a fire sensor 1 or a high (over) voltage sensor 7 can be switched.
  • the size of the pressure vessel 5 is to be chosen so that the gas contained in it can completely fill the space 3 in the relaxed state, in which a fire has started or can occur.
  • the gun 2 is grounded in a known manner and can have a conventional structure with a driving nozzle and a supply of compressed air, which are not drawn to simplify the illustration.
  • the method according to the invention works as follows:
  • the non-combustible gas preferably CO2
  • the non-combustible gas now flows into the feed line 4 or into the gun 2 and from there to the room 3.
  • the oxygen in this area is then displaced and a fire is thereby suffocated or excluded.
  • the supply of the material to be sprayed is terminated via a valve 6, so that a fire or the occurrence of a fire is reliably prevented even after the incombustible gas has escaped from the room 3.
  • the installer can device can be put back into operation.
  • CO2 is commercially available as a non-combustible gas in suitable small containers and a connection of the same in the device according to the invention is possible without major technical effort, an ideal solution to the problems at hand can be said in view of the safe fire extinguishing or prevention.
  • the size of the pressure vessel 5 or the amount of the incombustible gas to be used can be determined empirically by experiment.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Nozzles (AREA)

Abstract

Einrichtung zum Versprühen von Lack oder Kunststoffpul­ver, mit einer Spritzpistole, die von Preßluft durch­strömt wird und einem Behälter für das zu versprühende Gut, wobei sie einen mit einem unbrennbaren Gas gefüll­ten Druckbehälter (5) aufweist, der über ein Ventil mit der Spritzpistole (2) oder mit der das Gut fördernden Zuleitung (4) verbunden ist und das Ventil (8) über einen Brandsensor (1) und/oder über einen Hochspannungs­sensor (7) und/oder manuell steuerbar ist.

Figure imgaf001
Device for spraying paint or plastic powder, with a spray gun through which compressed air flows and a container for the material to be sprayed, it having a pressure container (5) filled with an incombustible gas, which is connected to the spray gun (2) via a valve or is connected to the supply line (4) conveying the goods and the valve (8) can be controlled manually via a fire sensor (1) and / or via a high-voltage sensor (7).
Figure imgaf001

Description

Die Erfindung betrifft eine Einrichtung zum Versprühen von Lack oder Kunststoffpulver, mit einer Spritzpistole, die von Preßluft durchströmt wird und einem Behälter für das zu versprühende Gut.The invention relates to a device for spraying paint or plastic powder, with a spray gun through which compressed air flows and a container for the material to be sprayed.

Beim Verarbeiten bzw. Versprühen von Lack oder Pulver mit Spritzpistolen bzw. Spritzeinrichtungen ist wegen der leichten Entflammbarkeit des zerstäubten Mediums die Mög­lichkeit vorhanden, daß das zerstäubte Medium in Brand gerät. Dies ist insbesondere durch die elektrostatische Ladung des zerstäubten Mediums bzw. die Hochspannung zur Aufbringung des Mediums gegeben. Es ist daher Vorschrift, daß Sprüheinrichtungen bzw. -pistolen mit selbsttätig wirkenden Brandunterdrückungsanlagen ausgerüstet sind.When processing or spraying paint or powder with spray guns or spraying devices, because of the easy flammability of the atomized medium, there is a possibility that the atomized medium will catch fire. This is given in particular by the electrostatic charge of the atomized medium or the high voltage for applying the medium. It is therefore a requirement that spray devices or spray guns are equipped with self-acting fire suppression systems.

Es gibt in diesem Zusammenhang Anlagen, die im Brandfall durch einen Sensor ausgelöst werden und eine große, die gesamte Spritz- oder Sprühkabine füllende Löschmittelmen­ge zum Einsatz bringen. Als Löschmittel wird hierbei CO₂, Halon oder Wasser verwendet.In this context, there are systems that are triggered by a sensor in the event of fire and use a large amount of extinguishing agent that fills the entire spray or spray booth. As an extinguishing agent, CO₂, halon or water is used.

Nachteilig ist dabei, daß CO₂ in den großen erforderli­chen Mengen wegen des sich ergebenden Sauerstoffmangels äußerst personengefährdend ist und Halon wegen seiner chemischen Zusammensetzung als Fluorkohlenstoffgas äußerst umweltschädlich ist. Wasser wiederum verträgt sich praktisch nicht mit Lack oder einem zur Beschichtung geeigneter Pulver.The disadvantage here is that CO₂ in the large amounts required is extremely dangerous to people because of the resulting lack of oxygen and Halon is extremely environmentally harmful because of its chemical composition as a fluorocarbon gas. Water in turn tolerates practically not with paint or a powder suitable for coating.

Es sind weiterhin Pulverspritzpistolen bekanntgeworden, bei denen bei einem Brand nur eine kleine Menge Halon in die Pulver- oder Lackwolke gespritzt wird. Nachteilig ist dabei aber, daß eine sichere Löschwirkung nicht gegeben ist.Powder spray guns have also become known in which only a small amount of halon is sprayed into the powder or paint cloud in the event of a fire. However, it is disadvantageous that there is no reliable extinguishing effect.

Es ist Aufgabe der Erfindung, diese Nachteile zu vermei­den und eine Einrichtung zum Versprühen von Lack oder Kunststoffpulver zu schaffen, bei der das Löschen oder Verhindern eines Brandes mit relativ geringen Mengen von unbrennbaren Gasen möglich ist bzw. bei denen eine siche­re Brandbekämpfung mit nur geringen und unschädlichen Gasen möglich ist.It is an object of the invention to avoid these disadvantages and to provide a device for spraying paint or plastic powder in which the extinguishing or prevention of a fire is possible with relatively small amounts of incombustible gases or in which a safe fire-fighting with only small and harmless gases is possible.

Das Verfahren zum Betreiben einer solchen Einrichtung soll einfach und betriebssicher sein und nur einen gerin­gen Aufwand erfordern, wobei eine Personengefährdung sicher ausgeschlossen sein soll.The method for operating such a device should be simple and reliable and only require a small outlay, with the risk of personal injury being excluded.

Im folgenden wird ein Ausführungsbeispiel der Erfindung bzw. das erfindungsgemäße Verfahren anhand einer schema­tischen Darstellung einer Einrichtung zum Versprühen von Lack oder Kunststoff gemäß der Erfindung näher beschrie­ben.An exemplary embodiment of the invention and the method according to the invention are described in more detail below with the aid of a schematic illustration of a device for spraying paint or plastic according to the invention.

Die Zeichnung zeigt eine Pulver- oder Lackspritzpistole 2 mit einer Zuleitung 4 für das zu versprühende Gut. In der Zuleitung 4 ist ein Absperrventil 6 für das zu ver­sprühende Gut eingebaut, welches den Gutstrom schlagartig abzusperren vermag.The drawing shows a powder or paint spray gun 2 with a feed line 4 for the material to be sprayed. In the feed line 4, a shut-off valve 6 for the material to be sprayed is installed, which can suddenly shut off the material flow.

Über ein ebenfalls schnell schaltbares Ventil 8 ist mit der Zuleitung 4 ein Druckbehälter 5 für ein nicht brenn­bares Gas verbunden, wobei das Ventil 8 entweder über einen Brandsensor 1 oder einen Hoch(über)spannungssensor 7 schaltbar ist.A pressure vessel 5 for a non-combustible gas is connected to the feed line 4 via a valve 8, which can also be switched quickly, the valve 8 either via a fire sensor 1 or a high (over) voltage sensor 7 can be switched.

Die Größe des Druckbehälters 5 ist dabei so zu wählen, daß das in ihm enthaltene Gas im entspannten Zustand den Raum 3 vollständig auszufüllen vermag, in welchem ein Brand entstanden ist bzw. entstehen kann.The size of the pressure vessel 5 is to be chosen so that the gas contained in it can completely fill the space 3 in the relaxed state, in which a fire has started or can occur.

Die Pistole 2 ist in bekannter Weise geerdet und kann einen üblichen Aufbau mit einer Treibdüse und einer Zuführung von Preßluft aufweisen, die zur Vereinfachung der Darstellung nicht gezeichnet sind.The gun 2 is grounded in a known manner and can have a conventional structure with a driving nozzle and a supply of compressed air, which are not drawn to simplify the illustration.

Das erfindungsgemäße Verfahren arbeit wie folgt:The method according to the invention works as follows:

Wenn in dem Raum oder Bereich 3 ein Brand entstanden ist, wird dieser durch den Brandsensor 1 erfaßt und über ein entsprechendes Steuerelement das Ventil 8 schlagartig geöffnet. Gleiches gilt, wenn der Hoch(über)spannungssen­sor 7 eine Spannung meldet, die einen Brand als möglich erscheinen läßt.If a fire has arisen in the room or area 3, this is detected by the fire sensor 1 and the valve 8 is opened suddenly by means of a corresponding control element. The same applies if the high (over) voltage sensor 7 reports a voltage that makes a fire appear possible.

Durch die Öffnung des Ventils 8 strömt jetzt das nicht brennbare gas, vorzugsweise CO₂, in die Zuleitung 4 bzw. in die Pistole 2 und von dort zu dem Raum 3. Der Sauer­stoff in diesem Bereich wird dann verdrängt und ein Brand dadurch erstickt oder ausgeschlossen.Through the opening of the valve 8, the non-combustible gas, preferably CO₂, now flows into the feed line 4 or into the gun 2 and from there to the room 3. The oxygen in this area is then displaced and a fire is thereby suffocated or excluded.

Zusätzlich zu der Einleitung des unbrennbaren Gases wird über ein Ventil 6 die Zufuhr des zu versprühenden Gutes abgeschlossen, so daß auch nach Entweichen des nicht brennbaren Gases aus dem Raum 3 ein Wiederaufflammen eines Brandes bzw. eine Brandentstehung sicher verhindert wird.In addition to the introduction of the incombustible gas, the supply of the material to be sprayed is terminated via a valve 6, so that a fire or the occurrence of a fire is reliably prevented even after the incombustible gas has escaped from the room 3.

Nach Beseitigen des Brandes oder Beseitigen einer einen Brand ermöglichenden Hoch(über)spannung kann die Einrich­ tung wieder in Betrieb genommen werden.After eliminating the fire or eliminating a high (over) voltage that enables a fire, the installer can device can be put back into operation.

Da zum Beispiel CO₂ als nicht brennbares Gas in geeigne­ten kleinen Behältern handelsüblich ist und ein Anschluß derselben in der erfindungsgemäßen Einrichtung problemlos ohne größeren technischen Aufwand möglich ist, kann ange­sichts der sicheren Brandlöschung oder -verhinderung von einer idealen Lösung der anstehenden Probleme gesprochen werden.Since, for example, CO₂ is commercially available as a non-combustible gas in suitable small containers and a connection of the same in the device according to the invention is possible without major technical effort, an ideal solution to the problems at hand can be said in view of the safe fire extinguishing or prevention.

Die Größe des Druckbehälters 5 bzw. die Menge des zu ver­wendenden unbrennbaren Gases kann durch Versuche empi­risch ermittelt werden.The size of the pressure vessel 5 or the amount of the incombustible gas to be used can be determined empirically by experiment.

Claims (5)

1. Einrichtung zum Versprühen von Lack oder Kunststoff­pulver, mit einer Spritzpistole, die von Preßluft durchströmt wird und einem Behälter für das zu ver­sprühende Gut,
dadurch gekennzeichnet, daß sie einen mit einem un­brennbaren Gas gefüllten Druckbehälter (5) aufweist, der über ein Ventil mit der Spritzpistole (2) oder mit der das Gut fördernden Zuleitung (4) verbunden ist.1. Device for spraying paint or plastic powder, with a spray gun through which compressed air flows and a container for the material to be sprayed,
characterized in that it has a pressure container (5) filled with an incombustible gas, which is connected via a valve to the spray gun (2) or to the feed line (4) conveying the material. 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Ventil (8) über einen Brandsensor (1) und/oder über einen Hochspannungssensor (7) und/oder manuell steuerbar ist.2. Device according to claim 1, characterized in that the valve (8) via a fire sensor (1) and / or via a high-voltage sensor (7) and / or can be controlled manually. 3. Einrichtung nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß sie ein Ventil (6) zur Unterbrechung des Gutstromes in der Zuleitung (4) aufweist, welches schließt, wenn das Ventil (8) geöffnet wird.3. Device according to claim 1 or 2, characterized in that it has a valve (6) for interrupting the flow of material in the feed line (4), which closes when the valve (8) is opened. 4. Verfahren zum Betreiben der Einrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß im Brandfall oder bei Erkennen einer einen Brand ermög­lichenden Situation der Brandherd oder die brandge­fährdete Stelle über die Sprühpistole unter ein un­brennbares Gas gesetzt wird und die Zufuhr weiteren Beschichtungsguts gestoppt wird.4. A method of operating the device according to one of claims 1 to 3, characterized in that in the event of fire or upon detection of a situation which enables a fire, the source of the fire or the location at risk of fire is placed under the non-flammable gas via the spray gun and the supply of further coating material is stopped becomes. 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß das unbrennbare Gas CO₂ ist.5. The method according to claim 4, characterized in that the incombustible gas is CO₂.
EP19890710059 1988-06-29 1989-06-29 Installation for spraying lacquers or plastic powder Withdrawn EP0349475A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3821851A DE3821851A1 (en) 1988-06-29 1988-06-29 DEVICE FOR SPRAYING VARNISH OR PLASTIC POWDER
DE3821851 1988-06-29

Publications (2)

Publication Number Publication Date
EP0349475A2 true EP0349475A2 (en) 1990-01-03
EP0349475A3 EP0349475A3 (en) 1990-11-14

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EP19890710059 Withdrawn EP0349475A3 (en) 1988-06-29 1989-06-29 Installation for spraying lacquers or plastic powder

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DE (1) DE3821851A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0550848A3 (en) * 1992-01-04 1993-09-01 Alfo Ag Aktiengesellschaft Fuer Industrieapparate Valve for fire extinguishing substances
FR2733918A1 (en) * 1995-05-12 1996-11-15 Ind Rationalisierungs Syst FIRE EXTINGUISHING DEVICE FOR AN ELECTROSTATIC COATING DEVICE
CN106733282A (en) * 2016-12-03 2017-05-31 天长市金陵电子有限责任公司 One kind is conducive to the uniform liquefied plastic spraying gum of plastic powders

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4335827C2 (en) * 1993-10-20 2001-06-07 Siemens Ag Process and extinguishing system for extinguishing a fire

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2071478A5 (en) * 1969-12-30 1971-09-17 Tunzini
DE2060098A1 (en) * 1970-12-07 1972-06-22 Boehringer Sohn Ingelheim Pressurized gas spray gun
AT365481B (en) * 1980-05-28 1982-01-25 Vianova Kunstharz Ag PAINT PROCESS
US4161289A (en) * 1978-04-14 1979-07-17 Cbs Inc. Airbrush
DE2819666A1 (en) * 1978-05-05 1979-11-08 Irs Gmbh Paint spray gun for fluids or powders - incorporates fire extinguishing unit with extinguisher valve adjacent paint spray nozzle
US4244494A (en) * 1979-05-03 1981-01-13 Samuel Colgate, Robert Ramey And Associates, A Limited Partnership Method for inserting an additive liquid into a flowing fluid and discharging the resultant mixture
US4315600A (en) * 1980-01-17 1982-02-16 Chem-Lawn Corporation Spray gun injector
US4356868A (en) * 1980-07-30 1982-11-02 Ransburg Corporation Fire-extinguishant system
DE3214180A1 (en) * 1982-04-17 1983-10-20 Wolfgang 4800 Bielefeld Suttner Attachment for a spray gun
DE3345049C2 (en) * 1983-12-13 1986-06-05 Herbert Lochau Dietachmair Mixing gun for reactive multi-component materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0550848A3 (en) * 1992-01-04 1993-09-01 Alfo Ag Aktiengesellschaft Fuer Industrieapparate Valve for fire extinguishing substances
FR2733918A1 (en) * 1995-05-12 1996-11-15 Ind Rationalisierungs Syst FIRE EXTINGUISHING DEVICE FOR AN ELECTROSTATIC COATING DEVICE
US5794704A (en) * 1995-05-12 1998-08-18 Irs Industrie Rationalisierungs-Systeme Gmbh Fire extinguishing device for an electrostatic coating facility
CN106733282A (en) * 2016-12-03 2017-05-31 天长市金陵电子有限责任公司 One kind is conducive to the uniform liquefied plastic spraying gum of plastic powders

Also Published As

Publication number Publication date
DE3821851C2 (en) 1992-04-30
EP0349475A3 (en) 1990-11-14
DE3821851A1 (en) 1990-01-04

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