EP1253375B1 - Explosion-proof lamp - Google Patents

Explosion-proof lamp Download PDF

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Publication number
EP1253375B1
EP1253375B1 EP20020004722 EP02004722A EP1253375B1 EP 1253375 B1 EP1253375 B1 EP 1253375B1 EP 20020004722 EP20020004722 EP 20020004722 EP 02004722 A EP02004722 A EP 02004722A EP 1253375 B1 EP1253375 B1 EP 1253375B1
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EP
European Patent Office
Prior art keywords
opening
wall
circumferential
gap
cover
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.)
Expired - Fee Related
Application number
EP20020004722
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German (de)
French (fr)
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EP1253375A2 (en
EP1253375A3 (en
Inventor
Ralph Rohlfing
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Aqua Signal AG
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Aqua Signal AG
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Publication date
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Publication of EP1253375A2 publication Critical patent/EP1253375A2/en
Publication of EP1253375A3 publication Critical patent/EP1253375A3/en
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Publication of EP1253375B1 publication Critical patent/EP1253375B1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00Protecting lighting devices from damage
    • F21V15/01Housings, e.g. material or assembling of housing parts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00Safety devices structurally associated with lighting devices
    • F21V25/12Flameproof or explosion-proof arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V31/00Gas-tight or water-tight arrangements
    • F21V31/04Provision of filling media

Definitions

  • Luminaires with the identification "Ex” are intended for use in potentially explosive atmospheres and are used, for example, on drilling platforms or gas tankers. In the event of an explosion inside the luminaire, no explosive sparks may escape to the outside.
  • a tube is usually provided, which is preferably closed at both ends by covers and lid, which prevent an explosion of explosion sparks in an explosion. The construction of the transition between the hollow body and the respective cover on at least one end is of great importance for the pressure resistance of the luminaire.
  • luminaires with explosion-proof encapsulation according to the European standard EN 50014/50018 - luminaires of the type "E Ex d" - and preferably in connection with the use of "II B" and the degree of protection IP67 are addressed.
  • two or more fluorescent lamps e.g., 18 or 36 watt and 230 volt / 50 hertz lamps
  • holding means, supply line and a ballast are arranged inside the lamp.
  • the inner wall is inclined by 4 ° relative to the outer wall with a tolerance of +/- 4 ° corresponding to a total inclination of 0 ° to 8 °.
  • the inner wall and outer wall are inclined by about 0 ° to 4 °. The decreasing width of the recess or groove results surprisingly favorable pressure conditions within the recess or groove.
  • a free edge of the opening of the hollow body thus sits in the manner of a groove circumferential recess.
  • the groove is formed significantly wider than would be required for insertion of the circumferential wall.
  • the unfilled by the circumferential wall volume of the circumferential recess is at least partially filled on both sides by a potting compound.
  • This has adhesive and sealing function and should be selected accordingly.
  • outer gap or inner gap are completely filled with the potting compound.
  • the width of the outer gap corresponds approximately to the width of the inner gap or is slightly larger, in particular up to twice as large. Accordingly, in the outer gap with complete filling at most twice as much potting compound as in the inner gap can be introduced.
  • the free edge of the opening of the hollow body preferably has an opening-side end face - between the opening-side outer surface and the opening-side inner surface - in particular comes to lie with this on a bottom of the circumferential recess.
  • the opening has a circular cross-section. Accordingly, then follows the circumferential depression of a circular shape.
  • the peripheral wall or the free edge of the opening extends parallel to a main longitudinal axis of the hollow body or parallel to an axis passing through a center of the opening.
  • FIG. 1 A not completely complete luminaire 10 is shown in FIG. 1 in a perspective view.
  • a cylindrical, translucent tube made of plastic, here made of polycarbonate, each with an opening 14 at each end and a cover 16 on the opening 14.
  • the internal structure of the lamp 10 namely bulbs, holding means, ballast and cable feeders.
  • the luminaire 10 is designed as an E Ex d luminaire with degree of protection IP67 according to European standards EN 50014/50018.
  • the cover 16 is preferably made of a seawater-resistant material, such as the alloy G-Al Mg 5 Si.
  • the tube 12 has an outer diameter of about 15 cm; Overall, the luminaire 10 extends over about 75 cm (single length) or about 140 cm (double the length). Adapted to this are selection and number of bulbs.
  • the single-length lamp preferably contains one or more fluorescent lamps of the minimum total power of 36 watts.
  • the supply voltage is preferably 230 volts at 50 hertz.
  • FIG. 2 shows the connection of the cover 16 with the tube 12.
  • cover 16 In two provided at the opposite openings 14 covers 16 they are pulled by tie rods 18 against each other.
  • the tie rods 18 are arranged parallel to a main longitudinal axis 20 of the lamp 10 in the interior of the tube 12.
  • Each cover 16 has on an inner circumference 22 two eyes 24, which lie just below the main longitudinal axis 20 opposite each other, see FIG. 4.
  • the tie rods 18 are passed with their ends through the eyes 24 and secured with screws 26, 28 twice. Between cover 16 and tube 12, a sealing ring 30 or guard ring is arranged. The connection between the cover 16 and the tube 12 shown in FIG. 2 is provided at both ends of the tube 12. By tightening the nuts 26 in both covers 16, they are pressed against the tube 12.
  • the cover 16 is constructed in a special way.
  • Fig. 3 shows the side facing away from the viewer in Figures 2 and 4 of the cover 16.
  • Recognizable is a circumferential recess 32 in the manner of a groove having an inner wall 34, an outer wall 36 and an intermediate circumferential bottom 38th
  • Inner wall 34 and outer wall 36 do not extend exactly parallel to the main longitudinal axis 20. Rather, both walls are slightly inclined to the main longitudinal axis, preferably by 2 °, so that an inclination of the two walls 34, 36 against each other of about 4 ° results. Deviations of the total inclination of +/- 4 ° are possible in particular. Also, one of the walls, such as the inner wall 34 may be aligned parallel to the main longitudinal axis 20, while the other wall - in this case the outer wall 36 - is arranged inclined thereto.
  • the described inclination of the walls 34, 36 to each other causes a conical shape of the cross section of the recess 32 such that the width of the recess 32 to the bottom 38 increases. This achieves a better hold of the tube 12 in the recess 32.
  • the tube 12 is seated with a circumferential wall 40 in the recess 32.
  • the circumferential wall 40 has an opening-side inner surface 42 and an outer surface 44 opposite thereto and an opening-side end surface 46. This is preferably at the bottom 38.
  • the recess 32 with a potting compound 48 (in Fig. 6 hatched drawn) filled.
  • the width of the recess 32 is a multiple - preferably three times - the thickness of the circumferential wall 40.
  • Inner diameter and outer diameter of the recess 32 are tuned so that between the inner wall 34 and the inner surface 42, an inner gap 50 and between the outer wall 36 and outer surface 44, an outer gap 52 are formed.
  • Inner gap 50 and outer gap 52 have approximately the same width or a similar volume and are each completely filled with the potting compound 48.
  • the sealing of the circumferential wall 40 in the recess 32 with the potting compound 48 arranged on both sides is particularly pressure-resistant. Only then is it possible to classify it as an E Ex d luminaire.
  • FIG. 5 shows an internal thread 56 on an open side 54 facing away from the depression 32.
  • An external thread of a cover, not shown, for closing the cover 16 is screwed into this.
  • Explosion protection results from the design of the thread according to the European standards mentioned above.
  • potting compound 48 is preferably a bonding sealant manufacturer Dow Corning, namely Dow Corning 933 with associated curing agent Dow Corning 993 and suitable primer used.
  • Tube 12 and covers 16 are formed in the region of their connections substantially rotationally symmetrical. This is advantageous but not mandatory for the principle of the present invention. Deviations from the circular cross section are possible, such as oval, semicircular or rectangular cross-sections.
  • hollow body such as a one - sided (or single - ended) open body, a spherical or teardrop shape. Important is the double-sided sealing of the circumferential wall 40 in the recess 32nd
  • the specified electrical quantities can be modified or adjusted as needed and country-specific regulations. Also, further fluorescent lamps or other lighting means may be provided inside the tube 12.
  • Suitable clamps may include the tube 12 or be connected to the covers 16.

Description

Die Erfindung betrifft eine Leuchte mit Explosions-Schutz, mit einem zumindest einseitig eine Öffnung aufweisenden Hohlkörper zur Aufnahme für einen oder mehrere Leuchtmittel und einer Abdeckung, die auf der Öffnung angeordnet ist, mit folgenden Merkmalen:

  • a) der Hohlkörper weist im Bereich der Öffnung umlaufende Wandung auf,
  • b) die umlaufende Wandung weist eine öffnungseitige Innenfläche und eine öffnungsseitige Außenfläche auf,
  • c) die Abdeckung weist eine umlaufende Vertiefung mit einer inneren Wandung und einer äußeren Wandung auf,
  • d) bei auf der Öffnung angeordneter Abdeckung kommt die umlaufende Wandung in der umlaufenden Vertiefung zu liegen, wobei zwischen öffnungsseitiger Innenfläche und innerer Wandung ein Innenspalt gebildet ist, und wobei zwischen öffnungsseitiger Außenfläche und äußerer Wandung ein Außenspalt gebildet ist,
  • e) der Außenspalt ist zumindest teilweise mit einer Vergussmasse ausgefüllt,
  • f) der Innenspalt ist zumindest teilweise mit einer Vergussmasse ausgefüllt.
The invention relates to a luminaire with explosion protection, having an at least one side having an opening hollow body for receiving one or more lamps and a cover, which is arranged on the opening, having the following features:
  • a) the hollow body has circumferential wall in the region of the opening,
  • b) the circumferential wall has an opening-side inner surface and an outer-side outer surface,
  • c) the cover has a circumferential recess with an inner wall and an outer wall,
  • d) when arranged on the opening cover the circumferential wall is located in the circumferential recess, wherein between the opening-side inner surface and inner wall, an inner gap is formed, and wherein between the opening-side outer surface and outer wall, an outer gap is formed,
  • e) the outer gap is at least partially filled with a potting compound,
  • f) the inner gap is at least partially filled with a potting compound.

Leuchten mit der Kennung "Ex" sind zur Verwendung in explosionsgefährdeter Umgebung vorgesehen und kommen beispielsweise auf Bohrplattformen oder Gastankern zum Einsatz. Bei einer Explosion im Inneren der Leuchte dürfen keine Explosionsfunken nach außen austreten. Als Hohlkörper ist üblicher Weise eine Röhre vorgesehen, die vorzugsweise an ihren beiden Enden durch Abdeckungen und Deckel verschlossen ist, welche bei einer Explosion einen Austritt von Explosionsfunken verhindern. Die Konstruktion des Übergangs zwischen dem Hohlkörper und der jeweiligen Abdeckung an zumindest einem Ende ist für die Druckfestigkeit der Leuchte von großer Bedeutung.Luminaires with the identification "Ex" are intended for use in potentially explosive atmospheres and are used, for example, on drilling platforms or gas tankers. In the event of an explosion inside the luminaire, no explosive sparks may escape to the outside. As a hollow body, a tube is usually provided, which is preferably closed at both ends by covers and lid, which prevent an explosion of explosion sparks in an explosion. The construction of the transition between the hollow body and the respective cover on at least one end is of great importance for the pressure resistance of the luminaire.

Im vorliegenden Fall sind insbesondere Leuchten mit druckfester Kapselung nach dem europäischen Normen EN 50014/50018 - Leuchten der Art "E Ex d" - und vorzugsweise in Verbindung mit der Verwendung "II B" und der Schutzart IP67 angesprochen. Im Inneren der Leuchte sind vorzugsweise zwei oder mehr Leuchtstofflampen (z.B. -Lampen mit je 18 oder 36 Watt und für 230 Volt/50 Hertz) vorgesehen. Des weiteren sind im Inneren der Leuchte Haltemittel, Zuleitung und ein Vorschaltgerät angeordnet.In the present case, in particular luminaires with explosion-proof encapsulation according to the European standard EN 50014/50018 - luminaires of the type "E Ex d" - and preferably in connection with the use of "II B" and the degree of protection IP67 are addressed. Inside the luminaire, two or more fluorescent lamps (e.g., 18 or 36 watt and 230 volt / 50 hertz lamps) are preferably provided. Furthermore, holding means, supply line and a ballast are arranged inside the lamp.

Aus der AU 516 793 ist eine explosionsgeschützte Leuchte bekannt, bei der ein umlaufender Rand einer Glasröhre in einer umlaufenden Nut mit Vergussmasse gehalten ist.From AU 516 793 an explosion-proof lamp is known in which a peripheral edge of a glass tube is held in a circumferential groove with potting compound.

Zur Erzielung einer hohen Druckfestigkeit ist die erfindungsgemäße Leuchte im Bereich des Übergangs zwischen Abdeckung und Hohlkörper durch folgende Merkmale gekennzeichnet:

  • Die innere Wandung und die äußere Wandung bilden zusammen eine umlaufende Nut, die leicht konisch ausgebildet ist, mit zum Hohlkörper hin abnehmender Weite.
To achieve a high compressive strength, the luminaire according to the invention in the region of the transition between cover and hollow body is characterized by the following features:
  • The inner wall and the outer wall together form a circumferential groove which is slightly conical, with decreasing width to the hollow body.

Dabei ist vorzugsweise die innere Wandung um 4° gegenüber der äußeren Wandung geneigt mit einer Toleranz von +/- 4° entsprechend einer Neigung von insgesamt 0° bis 8°. Gegenüber der Hauptlängsachse sind die innere Wandung und äußere Wandung um etwa 0° bis 4° geneigt. Die abnehmende Weite der Vertiefung bzw. Nut ergibt überraschender Weise günstige Druckverhältnisse innerhalb der Vertiefung bzw. Nut.In this case, preferably, the inner wall is inclined by 4 ° relative to the outer wall with a tolerance of +/- 4 ° corresponding to a total inclination of 0 ° to 8 °. Compared to the main longitudinal axis, the inner wall and outer wall are inclined by about 0 ° to 4 °. The decreasing width of the recess or groove results surprisingly favorable pressure conditions within the recess or groove.

Ein freier Rand der Öffnung des Hohlkörpers sitzt somit in der nach Art einer Nut umlaufenden Vertiefung. Die Nut ist deutlich breiter ausgebildet, als dies zum Einsetzen der umlaufenden Wandung erforderlich wäre. Das von der umlaufenden Wandung nicht ausgefüllte Volumen der umlaufenden Vertiefung ist zumindest teilweise beidseitig durch eine Vergussmasse ausfüllt. Diese hat klebende und dichtende Funktion und ist entsprechend auszuwählen. Vorzugsweise sind Außenspalt oder Innenspalt vollständig mit der Vergussmasse gefüllt. Die Weite des Außenspalts entspricht etwa der Weite des Innenspalts oder ist etwas größer, insbesondere maximal doppelt so groß. Entsprechend ist in den Außenspalt bei vollständiger Füllung maximal doppelt so viel Vergussmasse wie in den Innenspalt einbringbar.A free edge of the opening of the hollow body thus sits in the manner of a groove circumferential recess. The groove is formed significantly wider than would be required for insertion of the circumferential wall. The unfilled by the circumferential wall volume of the circumferential recess is at least partially filled on both sides by a potting compound. This has adhesive and sealing function and should be selected accordingly. Preferably, outer gap or inner gap are completely filled with the potting compound. The width of the outer gap corresponds approximately to the width of the inner gap or is slightly larger, in particular up to twice as large. Accordingly, in the outer gap with complete filling at most twice as much potting compound as in the inner gap can be introduced.

Der freie Rand der Öffnung des Hohlkörpers weist vorzugsweise eine öffnungsseitige Stirnfläche - zwischen öffnungsseitiger Außenfläche und öffnungsseitiger Innenfläche - auf und kommt insbesondere mit dieser auf einem Boden der umlaufenden Vertiefung zu liegen.The free edge of the opening of the hollow body preferably has an opening-side end face - between the opening-side outer surface and the opening-side inner surface - in particular comes to lie with this on a bottom of the circumferential recess.

Vorteilhafterweise weist die Öffnung einen kreisförmigen Querschnitt auf. Entsprechend folgt dann auch die umlaufende Vertiefung einer Kreisform.Advantageously, the opening has a circular cross-section. Accordingly, then follows the circumferential depression of a circular shape.

Vorzugsweise erstreckt sich die umlaufende Wandung bzw. der freie Rand der Öffnung parallel zu einer Hauptlängsachse des Hohlkörpers oder parallel zu einer durch einen Mittelpunkt der Öffnung gehenden Achse.Preferably, the peripheral wall or the free edge of the opening extends parallel to a main longitudinal axis of the hollow body or parallel to an axis passing through a center of the opening.

Weitere Merkmale der Erfindung ergeben sich aus der Beschreibung und aus den Patentansprüchen.Further features of the invention will become apparent from the description and from the claims.

Vorteilhafte Ausführungsbeispiele der Erfindung werden nachfolgend anhand von Zeichnungen näher erläutert. Es zeigen:

Fig. 1
Eine Leuchte mit einer Röhre als Hohlkörper und beidseitigen Abdeckungen in perspektivischer Darstellung,
Fig. 2
ein Ende einer Röhre mit einer Abdeckung in perspektivischer, auseinandergezogener Darstellung,
Fig. 3
die Abdeckung gemäß Fig. 2 in perspektivischer Darstellung, jedoch aus einem um 180° geänderten Blickwinkel,
Fig. 4
die Abdeckung gemäß Fig. 2 in axialer Draufsicht,
Fig. 5
einen Schnitt durch die Abdeckung gemäß Fig. 4 entlang der Linie V-V,
Fig. 6
ein Detail der Abdeckung in vergrößerter Darstellung, nämlich eine Nut mit eingesetzter Röhre.
Advantageous embodiments of the invention will be explained in more detail with reference to drawings. Show it:
Fig. 1
A luminaire with a tube as a hollow body and two-sided covers in a perspective view,
Fig. 2
an end of a tube with a cover in perspective, exploded view,
Fig. 3
the cover of FIG. 2 in a perspective view, but from a changed by 180 ° angle,
Fig. 4
the cover according to FIG. 2 in an axial plan view,
Fig. 5
a section through the cover of FIG. 4 along the line VV,
Fig. 6
a detail of the cover in an enlarged view, namely a groove with inserted tube.

Eine nicht ganz vollständige Leuchte 10 zeigt Fig. 1 in perspektivischer Darstellung. Erkennbar ist eine zylindrische, lichtdurchlässige Röhre aus Kunststoff, hier aus Polycarbonat mit je einer Öffnung 14 an jedem Ende und einer Abdeckung 16 auf der Öffnung 14. Nicht gezeigt ist der innere Aufbau der Leuchte 10, nämlich Leuchtmittel, Haltemittel, Vorschaltgerät und Kabelzuführungen. Ebenfalls nicht ersichtlich ist ein Deckel zum Verschließen der hülsenförmigen Abdeckung 16.A not completely complete luminaire 10 is shown in FIG. 1 in a perspective view. Evident is a cylindrical, translucent tube made of plastic, here made of polycarbonate, each with an opening 14 at each end and a cover 16 on the opening 14. Not shown is the internal structure of the lamp 10, namely bulbs, holding means, ballast and cable feeders. Also not visible is a lid for closing the sleeve-shaped cover 16th

Die Leuchte 10 ist als E Ex d - Leuchte der Schutzart IP67 nach den europäischen Normen EN 50014/50018 ausgeführt. Die Abdeckung 16 besteht vorzugsweise aus einem seewasserfesten Werkstoff, etwa aus der Legierung G-Al Mg 5 Si.The luminaire 10 is designed as an E Ex d luminaire with degree of protection IP67 according to European standards EN 50014/50018. The cover 16 is preferably made of a seawater-resistant material, such as the alloy G-Al Mg 5 Si.

Die Röhre 12 weist einen Außendurchmesser von etwa 15 cm auf; Insgesamt erstreckt sich die Leuchte 10 über etwa 75 cm (einfache Länge) oder etwa 140 cm (doppelte Länge). Hieran angepasst sind Auswahl und Anzahl der Leuchtmittel. Die Leuchte einfacher Länge enthält vorzugsweise eine oder mehrere Leuchtstofflampen der Mindest-Gesamtstärke 36 Watt. Als Versorgungsspannung sind vorzugsweise 230 Volt bei 50 Hertz vorgesehen.The tube 12 has an outer diameter of about 15 cm; Overall, the luminaire 10 extends over about 75 cm (single length) or about 140 cm (double the length). Adapted to this are selection and number of bulbs. The single-length lamp preferably contains one or more fluorescent lamps of the minimum total power of 36 watts. The supply voltage is preferably 230 volts at 50 hertz.

Die Explosionsdarstellung in Fig. 2 zeigt die Verbindung der Abdeckung 16 mit der Röhre 12. Bei zwei an den gegenüberliegenden Öffnungen 14 vorgesehen Abdeckungen 16 sind diese durch Zugstangen 18 gegeneinander gezogen. Die Zugstangen 18 sind parallel zu einer Hauptlängsachse 20 der Leuchte 10 im Inneren der Röhre 12 angeordnet. Jede Abdeckung 16 weist an einem Innenumfang 22 zwei Augen 24 auf, die knapp unterhalb der Hauptlängsachse 20 einander gegenüber liegen, siehe Fig. 4.The exploded view in Fig. 2 shows the connection of the cover 16 with the tube 12. In two provided at the opposite openings 14 covers 16 they are pulled by tie rods 18 against each other. The tie rods 18 are arranged parallel to a main longitudinal axis 20 of the lamp 10 in the interior of the tube 12. Each cover 16 has on an inner circumference 22 two eyes 24, which lie just below the main longitudinal axis 20 opposite each other, see FIG. 4.

Die Zugstangen 18 sind mit ihren Enden durch die Augen 24 hindurchgeführt und mit Schrauben 26, 28 zweifach gesichert. Zwischen Abdeckung 16 und Röhre 12 ist ein Dichtring 30 oder Schutzring angeordnet. Die in Fig. 2 gezeigte Verbindung zwischen der Abdeckung 16 und der Röhre 12 ist an beiden Enden der Röhre 12 vorgesehen. Durch Anziehen der Muttern 26 in beiden Abdeckungen 16 werden diese an die Röhre 12 gepresst.The tie rods 18 are passed with their ends through the eyes 24 and secured with screws 26, 28 twice. Between cover 16 and tube 12, a sealing ring 30 or guard ring is arranged. The connection between the cover 16 and the tube 12 shown in FIG. 2 is provided at both ends of the tube 12. By tightening the nuts 26 in both covers 16, they are pressed against the tube 12.

Die Abdeckung 16 ist in besonderer Weise konstruiert. Fig. 3 zeigt die in den Figuren 2 und 4 dem Betrachter abgewandte Seite der Abdeckung 16. Erkennbar ist eine umlaufende Vertiefung 32 nach Art einer Nut mit einer inneren Wandung 34, einer äußeren Wandung 36 und einem dazwischenliegenden umlaufenden Boden 38.The cover 16 is constructed in a special way. Fig. 3 shows the side facing away from the viewer in Figures 2 and 4 of the cover 16. Recognizable is a circumferential recess 32 in the manner of a groove having an inner wall 34, an outer wall 36 and an intermediate circumferential bottom 38th

Die genauere Form der Vertiefung 32 und die Anordnung der Röhre 12 innerhalb der Vertiefung 32 sind den Figuren 5 und 6 entnehmbar. Innere Wandung 34 und äußere Wandung 36 erstrecken sich nicht genau parallel zur Hauptlängsachse 20. Vielmehr sind beide Wandungen geringfügig gegen die Hauptlängsachse geneigt, vorzugsweise um jeweils 2°, so dass sich eine Neigung der beiden Wandungen 34, 36 gegeneinander von etwa 4° ergibt. Abweichungen der Gesamtneigung von +/- 4° sind insbesondere möglich. Auch kann eine der Wandungen, etwa die innere Wandung 34 parallel zur Hauptlängsachse 20 ausgerichtet sein, während die andere Wandung - in diesem Fall die äußere Wandung 36 - hierzu geneigt angeordnet ist.The more detailed shape of the recess 32 and the arrangement of the tube 12 within the recess 32 are the figures 5 and 6 can be removed. Inner wall 34 and outer wall 36 do not extend exactly parallel to the main longitudinal axis 20. Rather, both walls are slightly inclined to the main longitudinal axis, preferably by 2 °, so that an inclination of the two walls 34, 36 against each other of about 4 ° results. Deviations of the total inclination of +/- 4 ° are possible in particular. Also, one of the walls, such as the inner wall 34 may be aligned parallel to the main longitudinal axis 20, while the other wall - in this case the outer wall 36 - is arranged inclined thereto.

Die beschriebene Neigung der Wandungen 34, 36 zueinander bewirkt eine konische Form des Querschnitts der Vertiefung 32 derart, dass die Weite der Vertiefung 32 zum Boden 38 hin zunimmt. Erreicht wird damit ein besserer Halt der Röhre 12 in der Vertiefung 32.The described inclination of the walls 34, 36 to each other causes a conical shape of the cross section of the recess 32 such that the width of the recess 32 to the bottom 38 increases. This achieves a better hold of the tube 12 in the recess 32.

Gemäß Fig. 6 sitzt die Röhre 12 mit einer umlaufenden Wandung 40 in der Vertiefung 32. Die umlaufende Wandung 40 weist eine öffnungsseitige Innenfläche 42 und eine hierzu gegenüberliegende Außenfläche 44 sowie eine öffnungsseitige Stirnfläche 46 auf. Diese liegt vorzugsweise am Boden 38 an.6, the tube 12 is seated with a circumferential wall 40 in the recess 32. The circumferential wall 40 has an opening-side inner surface 42 and an outer surface 44 opposite thereto and an opening-side end surface 46. This is preferably at the bottom 38.

Zur Abdichtung der Verbindung zwischen der Abdeckung 16 und der Röhre 12 ist die Vertiefung 32 mit einer Vergussmasse 48 (in Fig. 6 schraffiert gezeichnet) gefüllt. Die Weite der Vertiefung 32 beträgt ein mehrfaches - vorzugsweise das dreifache - der Dicke der umlaufenden Wandung 40. Innnendurchmesser und Außendurchmesser der Vertiefung 32 sind so abgestimmt, dass zwischen der inneren Wandung 34 und der Innenfläche 42 ein Innenspalt 50 und zwischen äußerer Wandung 36 und Außenfläche 44 ein Außenspalt 52 gebildet sind. Innenspalt 50 und Außenspalt 52 weisen etwa dieselbe Weite bzw. ein ähnliches Volumen auf und sind jeweils vollständig mit der Vergussmasse 48 ausgefüllt. Bei der Herstellung der Leuchte werden Röhre 12 und Abdeckung 16 zueinander zentriert gehalten bis die Vergussmasse 48 in der Vertiefung 32 erstarrt ist. Die Abdichtung der umlaufenden Wandung 40 in der Vertiefung 32 mit der beidseitig angeordneten Vergussmasse 48 ist besonders druckfest. Erst dadurch ist eine Klassifizierung als E Ex d - Leuchte möglich.To seal the connection between the cover 16 and the tube 12, the recess 32 with a potting compound 48 (in Fig. 6 hatched drawn) filled. The width of the recess 32 is a multiple - preferably three times - the thickness of the circumferential wall 40. Inner diameter and outer diameter of the recess 32 are tuned so that between the inner wall 34 and the inner surface 42, an inner gap 50 and between the outer wall 36 and outer surface 44, an outer gap 52 are formed. Inner gap 50 and outer gap 52 have approximately the same width or a similar volume and are each completely filled with the potting compound 48. In the manufacture of the lamp tube 12 and cover 16 are kept centered to each other until the potting compound 48 is solidified in the recess 32. The sealing of the circumferential wall 40 in the recess 32 with the potting compound 48 arranged on both sides is particularly pressure-resistant. Only then is it possible to classify it as an E Ex d luminaire.

Fig. 5 zeigt schließlich noch an einer der Vertiefung 32 abgewandten offenen Seite 54 ein Innengewinde 56. In dieses wird ein Außengewinde eines nicht gezeigten Deckels zum Verschließen der Abdeckung 16 eingeschraubt. Ein Explosionsschutz (Funkenschutz) ergibt sich durch Gestaltung des Gewindes entsprechend den oben genannten Europäischen Normen.Finally, FIG. 5 shows an internal thread 56 on an open side 54 facing away from the depression 32. An external thread of a cover, not shown, for closing the cover 16 is screwed into this. Explosion protection (spark protection) results from the design of the thread according to the European standards mentioned above.

Als Vergussmasse 48 wird vorzugsweise ein Verklebungsdichtstoff des Herstellers Dow Corning, nämlich Dow Corning 933 mit zugehörigem Härter Dow Corning 993 und geeignetem Primer verwendet.As potting compound 48 is preferably a bonding sealant manufacturer Dow Corning, namely Dow Corning 933 with associated curing agent Dow Corning 993 and suitable primer used.

Röhre 12 und Abdeckungen 16 sind im Bereich ihrer Verbindungen im Wesentlichen rotationssymmetrisch ausgebildet. Dies ist für das Prinzip der vorliegenden Erfindung vorteilhaft aber nicht zwingend. Abweichungen vom kreisrunden Querschnitt sind möglich, etwa oval-, halbkreis- oder rechteckförmige Querschnitte.Tube 12 and covers 16 are formed in the region of their connections substantially rotationally symmetrical. This is advantageous but not mandatory for the principle of the present invention. Deviations from the circular cross section are possible, such as oval, semicircular or rectangular cross-sections.

Schließlich kann als Hohlkörper auch eine andere Bauart vorgesehen sein, etwa ein einseitiger (bzw. einseitig gesockelter) offener Körper, eine Kugel - oder Tropfenform. Wichtig ist die beidseitige Abdichtung der umlaufenden Wandung 40 in der Vertiefung 32.Finally, another type of hollow body may also be provided, such as a one - sided (or single - ended) open body, a spherical or teardrop shape. Important is the double-sided sealing of the circumferential wall 40 in the recess 32nd

Die angegeben elektrischen Größen können nach Bedarf und länderspezifischen Vorschriften abgewandelt bzw. angepasst werden. Auch können weitere Leuchtstofflampen oder andere Leuchtmittel im Inneren der Röhre 12 vorgesehen sein.The specified electrical quantities can be modified or adjusted as needed and country-specific regulations. Also, further fluorescent lamps or other lighting means may be provided inside the tube 12.

Nicht gezeigt bzw. erläutert sind Haltemittel zur Befestigung der Leuchte 10 an einer Decke oder Wand. Geeignete Schellen können die Röhre 12 umfassen oder mit den Abdeckungen 16 verbunden sein.Not shown or explained are holding means for fixing the lamp 10 to a ceiling or wall. Suitable clamps may include the tube 12 or be connected to the covers 16.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

1010
Leuchtelamp
1212
Röhretube
1414
Öffnungenopenings
1616
Abdeckungencovers
1818
Zugstangendrawbars
2020
Hauptlängsachsemain longitudinal axis
2222
Innenumfanginner circumference
2424
Augeneyes
2626
Mutternnuts
2828
Mutternnuts
3030
Dichtringseal
3232
Vertiefungdeepening
3434
innere Wandunginner wall
3636
äußere Wandungouter wall
3838
Bodenground
4040
umlaufende Wandungcircumferential wall
4242
Innenflächepalm
4444
Außenflächeouter surface
4646
Stirnflächeface
4848
Vergussmassepotting compound
5050
Innenspaltinterior gap
5252
Außenspaltouter gap
5454
offene Seiteopen side
5656
Innengewindeinner thread

Claims (7)

  1. Explosion-proof luminaire (10) having a hollow body, which has an opening (14) on at least one side, for the purpose of accommodating one or more luminous means and having a cover (16), which is arranged on the opening (14), and having the following features:
    a) the hollow body has a circumferential wall (40) in the region of the opening (14),
    b) the circumferential wall (40) has an opening-side inner face (42) and an opening-side outer face (44),
    c) the cover (16) has a circumferential depression (32) having an inner wall (34) and an outer wall (36),
    d) when the cover (16) is arranged on the opening (14), the circumferential wall (40) comes to lie in the circumferential depression (32), an inner gap (50) being formed between the opening-side inner face (42) and the inner wall (34), and an outer gap (52) being formed between the opening-side outer face (44) and the outer wall (36),
    e) the outer gap (52) is at least partially filled with a casting compound (48),
    f) the inner gap (50) is at least partially filled with a casting compound (48),
    g) the inner wall (34) and the outer wall (36) together form a circumferential groove, which is conical, having a width which decreases towards the hollow body.
  2. Luminaire according to Claim 1, characterized in that the outer gap (52) and the inner gap (50) are completely filled with casting compound (48).
  3. Luminaire according to Claim 1 or 2, characterized in that the opening (14) has a circular cross section.
  4. Luminaire according to Claim 1, characterized in that the circumferential wall (40) extends parallel to a main longitudinal axis (20) of the hollow body, at least in the region of the opening (14).
  5. Luminaire according to Claim 1, characterized in that the circumferential wall (40) extends parallel to an axis passing through a centre point of the opening (14), at least in the region of the opening (14).
  6. Luminaire according to Claim 1, characterized in that an opening-side front face (46), which rests on a base (38) of the circumferential depression (32) or a base-side sealing ring (30), is provided between the opening-side outer face (44) and the opening-side inner face (42).
  7. Luminaire according to Claim 1, characterized in that the inner wall (34) and the outer wall (36) are aligned parallel to one another.
EP20020004722 2001-04-26 2002-03-01 Explosion-proof lamp Expired - Fee Related EP1253375B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20107247U 2001-04-26
DE20107247U DE20107247U1 (en) 2001-04-26 2001-04-26 Luminaire with explosion protection

Publications (3)

Publication Number Publication Date
EP1253375A2 EP1253375A2 (en) 2002-10-30
EP1253375A3 EP1253375A3 (en) 2005-05-04
EP1253375B1 true EP1253375B1 (en) 2006-08-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020004722 Expired - Fee Related EP1253375B1 (en) 2001-04-26 2002-03-01 Explosion-proof lamp

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EP (1) EP1253375B1 (en)
DE (2) DE20107247U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101469851B (en) * 2007-12-29 2010-06-23 海洋王照明科技股份有限公司 Explosion-proof fluorescent lamp

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010053654B4 (en) 2010-12-06 2013-03-07 Bundesrepublik Deutschland, vertreten durch das Bundesministerium für Wirtschaft und Technologie, dieses vertreten durch den Präsidenten der Physikalisch-Technischen Bundesanstalt lighting device
DE102012023989A1 (en) 2012-12-06 2014-06-12 Cooper Crouse-Hinds Gmbh Explosion-proof light
ES2741805T3 (en) * 2015-04-29 2020-02-12 Iguzzini Illuminazione Strip-shaped lighting device comprising sources of spot light emission, provided with means adapted to control the stretching and twisting movements of said strip
DE102015108753A1 (en) * 2015-06-02 2016-12-08 watt24 GmbH stable light
US10655797B2 (en) * 2015-08-13 2020-05-19 Signify Holding B.V. Elongated lighting device based on solid state lighting technology
KR102579775B1 (en) * 2021-05-14 2023-09-21 (주)우신에이펙 Cylinder Type Explosion Proof Lamp Slope Fixture

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Publication number Priority date Publication date Assignee Title
AU516793B2 (en) * 1977-09-26 1981-06-25 Crouse-Hinds (Australia) Pty Ltd Enclosure for explosion resisting fluorescent light
DD228714A3 (en) * 1982-11-11 1985-10-16 Eow Oberweimar Veb EXPLOSION-PROOF, PRESSURE-RESISTANT FLUORESCENT LAMP LAMP
GB8708147D0 (en) * 1987-04-06 1987-05-13 Bicc Plc Electric lighting fitting
DE3736618A1 (en) * 1987-10-29 1989-05-11 Ceag Licht & Strom LUMINAIRE WITH A TRANSPARENT COVER TUB AND A LUMINAIRE BASE CONNECTED TO IT
US5291379A (en) * 1993-04-01 1994-03-01 Jem Dong Lu Protective lamp-shade

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101469851B (en) * 2007-12-29 2010-06-23 海洋王照明科技股份有限公司 Explosion-proof fluorescent lamp

Also Published As

Publication number Publication date
DE50207968D1 (en) 2006-10-12
DE20107247U1 (en) 2001-08-16
EP1253375A2 (en) 2002-10-30
EP1253375A3 (en) 2005-05-04

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