EP2715225B1 - Abdeckung und leuchte mit einer solchen abdeckung - Google Patents

Abdeckung und leuchte mit einer solchen abdeckung Download PDF

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Publication number
EP2715225B1
EP2715225B1 EP12725632.9A EP12725632A EP2715225B1 EP 2715225 B1 EP2715225 B1 EP 2715225B1 EP 12725632 A EP12725632 A EP 12725632A EP 2715225 B1 EP2715225 B1 EP 2715225B1
Authority
EP
European Patent Office
Prior art keywords
cover
luminaire
protective cover
previous
protective
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.)
Active
Application number
EP12725632.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2715225A1 (de
Inventor
Gerhard Schwarz
Reiner Naumann
Rudolf Brandel
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.)
Eaton Protection Systems IP GmbH and Co KG
Original Assignee
Eaton Protection Systems IP GmbH and Co KG
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 Eaton Protection Systems IP GmbH and Co KG filed Critical Eaton Protection Systems IP GmbH and Co KG
Publication of EP2715225A1 publication Critical patent/EP2715225A1/de
Application granted granted Critical
Publication of EP2715225B1 publication Critical patent/EP2715225B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/12—Flameproof or explosion-proof arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/061—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being glass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/005—Sealing arrangements therefor

Definitions

  • the invention relates to a cover in particular for an explosion-proof lamp.
  • Such lights usually have a housing and at least one light source, wherein a housing opening is closed by such a cover.
  • the cover has a holding frame detachably fastened to the lamp and a transparent lamp cover held by the holding frame at least along a peripheral edge. Through the lamp cover light of the light source comes out to allow a corresponding illumination.
  • Such explosion-proof lights may be floodlights, headlamps, suspension lights or other lights.
  • a corresponding light source is, for example, a halogen lamp, an incandescent lamp, a high-pressure discharge lamp or a plurality of light-emitting diodes (LEDs).
  • associated electrical and electronic devices for operating and controlling the light source may be included in the explosion-proof light.
  • Such a luminaire is used in different temperature ranges. Both with regular operation of the lamp or in tests or the like, there is a risk that microcracks occur in the lamp cover. These can adversely affect the stability of the luminaire cover and in particular worsen the explosion protection properties.
  • EP 0 556 710 A2 shows a lamp with a lamp housing and a transparent disc, which closes the lamp housing forward in the light emission direction.
  • the transparent pane includes a front pane of glass and an auxiliary pane, which is a type of laminated pane form. This is clamped between a lip of a threaded ring and a front end of a reflector.
  • EP 0.556.710 discloses a cover according to the preamble of claim 1.
  • DE 8 802 997 U1 shows a headlamp with a front laminated glass pane and a spaced over an inner disc to this gap.
  • the laminated glass pane is arranged between a radially inwardly pointing shoulder and a mounting ring.
  • the inner disc also abuts against the inwardly facing shoulder and is pressed against it.
  • EP 0 431 462 A2 shows a flashlight with a tubular housing and a cap.
  • a tube is welded whose outer region surrounds a metal core pressure-resistant, which has an internal thread.
  • a threaded ring for fixing a disc assembly is screwed.
  • the disc assembly comprises a cover plate and a protective disc. Cover and protective plate are clamped between a radially inwardly projecting nose of the threaded ring and another threaded ring.
  • GB654205A describes a lamp with a hemispherical housing whose opening is closed by a transparent flat plate.
  • the flat plate is arranged in a groove of a first metal ring and glued there.
  • the present invention has for its object to improve a cover of the type mentioned in that with simple design means and without greater weight gain or cost increase a cover is provided, which is particularly safe to use in hazardous areas.
  • a transparent protective cover of the luminaire cover is provided for the ignition-proof and impact-resistant design of the cover.
  • two corresponding transparent covers are used, of which in particular the lamp cover meets the corresponding requirements in terms of explosion protection, while the protective cover increases at least the shock or impact resistance of the cover and optionally also contributes to explosion protection.
  • Corresponding micro-cracks will occur in this way only in the outer protective cover, without the light cover closer to the corresponding light source is negatively affected in this regard.
  • the transparent protective cover it is possible to make the transparent protective cover relatively thin, since corresponding shocks or blows can be absorbed by the protective cover in a sufficient manner. Even with impact tests to check the cover or In this context, the luminaire is only exposed directly to the force of the corresponding impact or shock while the luminaire cover is protected by the protective cover. Corresponding microcracks will only occur in the protective cover, so that the luminaire cover continues to meet all requirements for flame resistance or pressure resistance in a wide temperature range.
  • the protective cover and luminaire cover are sealed at least in places relative to one another.
  • the corresponding sealing material is arranged along the circumference between the protective cover and the lamp cover.
  • a sealing material is a thin sealing strip, which is applied, for example, before placing the lamp cover on a back of the protective cover. Subsequently, the lamp cover is then pressed against the protective cover, so that also the corresponding sealing strip is subjected to force along its entire length and forms a sufficient seal between the protective cover and the lamp cover. At the same time a corresponding curing of the soverklebung done, so that a secure fixation of the lighting and protective covers is ensured relative to each other with interposed sealing strip.
  • the lamp cover and protective cover are formed with substantially the same geometric dimensions: that is, they have the same widths and lengths with respect to a corresponding light exit opening of the lamp, although the thicknesses may be different.
  • the light cover is thicker than the protective cover.
  • luminaire and / or protective cover are made of a transparent plastic material.
  • they may be formed of glass.
  • Preferred glasses are, for example, borosilicate glass or mineral glass.
  • both covers Due to the corresponding same geometric dimensions of both covers, these can be held in a simplified manner by the holding frame with respect to the luminaire and fixed relative thereto.
  • the holding frame along the peripheral edge of the corresponding covers has a substantially inverted L-shaped cross-section. This serves both for lateral support and for fixing the light and protective cover to the outside.
  • both the luminaire and the protective cover can be pre-assembled and fixed to the luminaire even before the cover is fitted to the luminaire.
  • a corresponding bonding takes place only on site directly when attaching the cover to the lamp.
  • the side bonding is formed essentially with the same adhesive thickness both along the peripheral edge and also with regard to the luminaire and protective cover. In this way, the corresponding soverklebung be applied as evenly applied adhesive before inserting the light and protective cover.
  • the corresponding soverklebung extends usually over the entire height of the covers, so that they are securely held and glued along its circumference.
  • the sealing not only of the covers relative to each other, but also the cover opposite the lamp can be further improved by when an end seal is disposed between the shorter L-leg and the protective cover.
  • This may, for example, extend substantially parallel to the sealing strip along an outer side of the protective cover.
  • the shorter L-leg can have at its free end an end protrusion pointing in the direction of the protective cover. Between this and the longer L-leg, the aforementioned end seal can be arranged and held.
  • the end projection may end at a distance from the protective cover.
  • the sealing strip or the end seal affect the light output of a corresponding lamp, or that when they are applied possibly occurring dirt are visible,
  • the sealing strip and end seal can be covered by the support frame in particular in the direction of light emission.
  • the support frame may have along its circumference a number of fastening recesses.
  • a screw can be arranged, which releasably secured by appropriate screwing with the lamp, the support frame and thus the cover with the associated parts of the lamp.
  • the invention also relates to a corresponding explosion-proof light with a housing and a light source arranged in the housing and a cover for a light exit opening of the housing described above.
  • FIG. 1 shows a partial perspective view of an embodiment of a cover according to the invention 1. This is used for releasably covering a light exit opening 21 of a housing 19 a particular explosion-proof light 2. Within the housing 19 is / are as a light source 20, for example, a halogen lamp, a high-pressure discharge lamp or a Plurality of LEDs arranged.
  • a light source 20 for example, a halogen lamp, a high-pressure discharge lamp or a Plurality of LEDs arranged.
  • the cover 1 is fastened by means of a number of screws 22 on the housing 19 of the lamp 2. These screws 22 are arranged in fastening recesses 18 along a circumference 15 of a holding frame 3 of the cover 1. Corresponding further sealing means between cover 1 and lamp 2 are for simplicity in FIG. 1 not shown.
  • the cover 1 is attached to the lamp 2, that this is a total explosion protection and can be used in hazardous areas.
  • a lamp For example, a floodlight, a headlight, a pendant or the like.
  • Part of the cover 1 is a transparent and usually formed of glass luminaire cover 5. Through this occurs light of the light source 20 from the lamp 2.
  • the lamp cover 5 is fixed by means of the holding frame 3 on the lamp housing 19.
  • the light cover 5 is also provided with a protective cover 6 which is also transparent.
  • Luminaire cover 5 and protective cover 6 may both be formed of glass, such as mineral glass or borosilicate glass.
  • the light cover 5 is thicker than the protective cover 6.
  • the protective cover 6 lies flat on an outer side of the lamp cover 5, wherein along a peripheral edge 4 between the two a sealing material 16 is arranged in the form of a sealing strip 17.
  • a small distance between the lamp cover 5 and the protective cover 6 can be provided outside this sealing strip 17, which additionally prevents transmission to the lamp cover 5 in the event of corresponding impacts or shocks.
  • the corresponding impacts or shocks are absorbed by the protective cover 6, so that only in this possibly corresponding microcracks arise.
  • microcracks also occur in the luminaire cover 5, otherwise their explosion protection properties could be adversely affected.
  • microcracks would adversely affect the stability of the luminaire cover 5 with respect to a corresponding pressurization from the interior of the luminaire 2 forth.
  • microcracks only occur in the corresponding protective cover 6, so that the explosion protection properties of the luminaire cover 5 or luminaire 2 as a whole are in no way negatively influenced.
  • the protective cover 6 is relatively thin, so that neither the weight of the corresponding lamp, nor their construction is negatively affected by corresponding production costs.
  • Luminaire cover 5 and protective cover 6 are held along its peripheral edge 4 by the holding frame 3.
  • 6 serves a byverklebung 9, which extends along a longer L-leg 7 of the support frame 3.
  • this holding frame 3 has an inverted L-shaped cross section.
  • a shorter L-leg 8 is provided, which extends inwardly and the peripheral edge 4 of the lamp cover 5 and protective cover 6 overlaps.
  • an end seal 12 is arranged, which extends in a substantially strip-shaped manner along the peripheral edge 4 between these two covers.
  • the shorter L-leg 8 at its free end 13 in the direction of top 23 of the protective cover 6 protruding end projection 14. This ends spaced from the top 23rd
  • the soverklebung 9 extends along the lamp cover 5 and protective cover 6, but ends substantially flush with the top 23 of the protective cover 6. There is also the possibility that either the isverklebung 9 extends beyond the end seal 12, or that the End seal 12 also extends above the Soverklebung 9.
  • a corresponding adhesive thickness 10 of the soverklebung 9 is substantially constant over the extent thereof along the edges of the lamp cover 5 and protective cover 6, wherein the soverklebung 9 along the entire circumference 11 of the lamp cover 5 and protective cover 6 extends.
  • the inventive cover 1, a corresponding explosion-proof light 2 is protected in a simple and safe way without major additional costs from exposure to shock or shock, so that an occurrence of microcracks in the light cover 5 is largely prevented.
  • the luminaire can be used with such a cover in potentially explosive areas without impairing its corresponding explosion protection properties.
  • any bumps or blows are no longer exerted directly on the light cover 5, but absorbed by the protective cover 6.
  • the avoidance of corresponding microcracks in the luminaire cover 5 means that it can withstand appropriate pressure tests for checking the explosion protection properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
EP12725632.9A 2011-06-03 2012-06-04 Abdeckung und leuchte mit einer solchen abdeckung Active EP2715225B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011103491.2A DE102011103491B4 (de) 2011-06-03 2011-06-03 Abdeckung und Leuchte mit einer solchen Abdeckung
PCT/EP2012/002394 WO2012163552A1 (de) 2011-06-03 2012-06-04 Abdeckung und leuchte mit einer solchen abdeckung

Publications (2)

Publication Number Publication Date
EP2715225A1 EP2715225A1 (de) 2014-04-09
EP2715225B1 true EP2715225B1 (de) 2017-02-08

Family

ID=46208433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12725632.9A Active EP2715225B1 (de) 2011-06-03 2012-06-04 Abdeckung und leuchte mit einer solchen abdeckung

Country Status (11)

Country Link
US (1) US9400098B2 (zh)
EP (1) EP2715225B1 (zh)
KR (1) KR101988679B1 (zh)
CN (2) CN108954261A (zh)
AU (1) AU2012265188C1 (zh)
BR (1) BR112013031007B1 (zh)
CA (1) CA2837907A1 (zh)
DE (1) DE102011103491B4 (zh)
RU (1) RU2601606C2 (zh)
SA (1) SA112330562B1 (zh)
WO (1) WO2012163552A1 (zh)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE429720C (de) * 1925-03-15 1926-06-05 Heinrich Meyer Grubenlampe mit Reflektor
US1921069A (en) * 1931-09-04 1933-08-08 Thomas & Betts Corp Safety lamp
GB654205A (en) * 1948-10-22 1951-06-13 Gen Electric Co Ltd Improvements in or relating to flameproof electric lighting fittings

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DE429720C (de) * 1925-03-15 1926-06-05 Heinrich Meyer Grubenlampe mit Reflektor
US1921069A (en) * 1931-09-04 1933-08-08 Thomas & Betts Corp Safety lamp
GB654205A (en) * 1948-10-22 1951-06-13 Gen Electric Co Ltd Improvements in or relating to flameproof electric lighting fittings

Also Published As

Publication number Publication date
WO2012163552A4 (de) 2013-02-21
US20140307448A1 (en) 2014-10-16
KR101988679B1 (ko) 2019-06-12
KR20140037143A (ko) 2014-03-26
AU2012265188C1 (en) 2015-10-01
AU2012265188B2 (en) 2015-06-11
CN103717965A (zh) 2014-04-09
BR112013031007B1 (pt) 2020-05-12
CN108954261A (zh) 2018-12-07
AU2012265188A1 (en) 2014-01-09
BR112013031007A2 (pt) 2016-11-29
US9400098B2 (en) 2016-07-26
CA2837907A1 (en) 2012-12-06
SA112330562B1 (ar) 2015-07-07
RU2601606C2 (ru) 2016-11-10
DE102011103491A1 (de) 2012-12-06
DE102011103491B4 (de) 2014-10-30
WO2012163552A1 (de) 2012-12-06
EP2715225A1 (de) 2014-04-09
RU2013155767A (ru) 2015-07-20

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