EP1756472B1 - Boitier resistant a la chaleur - Google Patents

Boitier resistant a la chaleur Download PDF

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Publication number
EP1756472B1
EP1756472B1 EP05744670A EP05744670A EP1756472B1 EP 1756472 B1 EP1756472 B1 EP 1756472B1 EP 05744670 A EP05744670 A EP 05744670A EP 05744670 A EP05744670 A EP 05744670A EP 1756472 B1 EP1756472 B1 EP 1756472B1
Authority
EP
European Patent Office
Prior art keywords
casing
heat resistant
intumescent material
housing
resistant casing
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.)
Not-in-force
Application number
EP05744670A
Other languages
German (de)
English (en)
Other versions
EP1756472A1 (fr
Inventor
Karl Justin Rawlins
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.)
Scolmore International Ltd
Original Assignee
Scolmore International Ltd
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
Priority claimed from GBGB0413655.2A external-priority patent/GB0413655D0/en
Application filed by Scolmore International Ltd filed Critical Scolmore International Ltd
Publication of EP1756472A1 publication Critical patent/EP1756472A1/fr
Application granted granted Critical
Publication of EP1756472B1 publication Critical patent/EP1756472B1/fr
Not-in-force 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • 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

Definitions

  • This invention relates to a new fire resistant casing for use with electrical fittings, particularly for use with lamp holders.
  • New building regulations require down-lighters fitted into ceilings to be provided with fire hoods to prevent or at least minimise the spread of fire.
  • Various types of fire hood have been proposed which include a fire resistant intumescent material that upon excessive heating (e.g. in the event of a fire) expand to many times their original volume, thus forming a fire barrier to minimise or prevent fire spread.
  • GB 2 326 467A describes a fire-resistant fabric hood containing a fitting to receive a bulb.
  • the hood consists of a flexible fabric coated or impregnated with a liquid based intumescent material.
  • An object of the present invention is to provide a new heat resistant casing (fire hood) which can be supplied already fitted with a lamp holder or other electrical fitting and which in use is efficient at minimising heat build up and also in preventing or minimising fire spread, should that occur.
  • a heat-resistant casing (10) for an electrical fitting (19) in which the casing (10) comprises a housing of fire resistant material comprising a top (11) supporting one or more side-walls (12), the top (11) is provided with at least one aperture (26), the housing encloses an electrical fitting (19) which is attached to the housing by an attachment means (16,18,20), and within the housing is a first solid fire-resistant intumescent material (17) positioned between the interior surface of the top (11) and the electrical fitting (19), whereby the housing is of a self-supporting substantially rigid construction, and the first solid fire-resistant intumescent material (17) is provided with at least one aperture (29), characterised in that the housing is provided with a collar (15) of a second solid fire-resistant intumescent material which extends substantially completely around the exterior surface of the side wall or walls (12), and the first solid fire-resistant intumescent material (17) is spaced apart from the interior surface of the top (11) to form a gap (16A)
  • the housing is preferably of substantially circular cross-section and is preferably of metal or plastic.
  • the top preferably has a plurality of apertures for ventilation (heat dissipation), passage of electrical cables and attachment means for the first fire resistant intumescent material.
  • the 'free edge' of the side wall i.e. the side wall remote from the top, preferably has an outwardly extending lip. This lip may be used for attachment of a cover for the electrical fitting. Where the electrical fitting is a lamp holder, a cover in the form of a decorative ring can be attached to the lip.
  • the casing is particularly applicable for recessing into a support structure such as a ceiling or wall, especially when the support structure is being constructed.
  • a seal is provided substantially overlying the lip so that the seal when in use is sandwiched between the lip and the surface into which the casing is fitted e.g. a ceiling or wall.
  • One aim of the seal is to prevent moisture and air from getting between the casing and the fitting surface (e.g. ceiling or wall) and thus into the voids between floors and into loft spaces. This is an area in which house builders are being told to clamp down, so to improve energy efficiency and is requested by the NHBC (National House Builders Council).
  • NHBC National House Builders Council
  • the seal helps to reduce the contact temperature between the rim of the downlighter and the ceiling board.
  • the seal may e.g. be made of a moisture resistant elastomeric composition and preferably is provided with a raised rib portion on the surface remote from the lip.
  • the intumescent material may be based on graphite or other intumescent materials which upon exposure to extreme heat expand in volume.
  • An example of a graphite based material is that supplied by Technical Fibre Products Limited as 'Intumescent Material' and consists of a high temperature "Rockwool" (Trade mark) fibre mat containing easily dispersed foliating graphite bonded in acrylic.
  • the first and second intumescent materials may be of the same composition or different.
  • the first intumescent material is provided with a plurality of apertures.
  • the apertures are for passage of electrical cables and/or for ventilation to dissipate heat that tends to build up in the casing when the electrical fitting is switched on.
  • a plate is provided to support the first intumescent material, in which case the plate is usually provided with apertures, at least some of which coincide with those of the first intumescent material.
  • the apertures are conveniently circular holes punched through with a suitable tool.
  • the plate is preferably sized to fit snugly within the casing and may then be attached to the interior surface of the top by means of e.g. nuts and bolts.
  • the nuts when present, also serve to maintain the necessary space between the interior surface of the top and the first intumescent material supported on the plate.
  • the gap between the interior surface of the top and the first intumescent material is in the range 2 to 8 mm, more preferably 2 to 5mm.
  • the electrical fitting is preferably positioned within the housing so that it does not touch the internal surface of the side wall or walls.
  • a heat resistant casing 10 comprises a cylindrical pressed steel housing consisting of a top 11 supporting a side wall 12.
  • the side wall 12 has a lip 13 onto which is clipped a cover 14 (see Figure 5 ) by means of spring clips 14a & 14b.
  • a collar 15 of solid fire resistant intumescent material surrounds the lower edge of the side wall 12.
  • the collar 15 is 25mm high and 1.2mm thick and is glued in place.
  • Within the housing is a steel plate 16 supporting a 1.2mm thick layer of solid fire resistant intumescent material 17. Plate16 and layer17 have corresponding apertures.
  • the gap 16A between the top 11 and layer 17 is chosen to be in the range 2 to 5mm.
  • the plate 16 is held in place by nuts and bolts 18, which also keep the gap 16A consistent.
  • a pressed steel lamp holder 19 is attached to plate 16 by means of nuts and bolts 20.
  • An aluminium lamp 21 fits into the lamp holder 19. Referring to Figure 2 , seven apertures are apparent in top 11. Through three apertures electrical cabling 22 to 24 passes, into two apertures are fitted fixing nuts and bolts for the terminal housing 25, one aperture 26 is open for ventilation, and one aperture 27 is occupied by a nut and bolt connected to the plate 16 inside the casing.
  • cables 22 and 23 are shown, together with ventilation apertures 28,29.
  • cables 22 & 23 are shown through plate 16, plus four ventilation apertures e.g. 30.
  • Figure 5 is a schematic representation showing i.a. more clearly how the downlighter cover 14 clips into place.
  • the apertures in the top 11, solid fire resistant intumescent material 17 and plate 16 act to ventilate the casing and dissipate heat.
  • the solid fire resistant intumescent material 17 expands to 9 times its volume, filling the gap between the top 11 and plate 16 and the aforementioned apertures including those through which the cabling passes. This expansion helps to prevent the fire from spreading e.g. to an upper floor when the housing is recessed into a ceiling. Also, the collar 15 of solid fire resistant intumescent material expands to nine times its volume, filling the space between the housing and the surrounding structure e.g. the ceiling. This expansion helps to prevent the fire from spreading. Where a seal is fitted as in Figure 6 , this aims to prevent moisture and air from getting between the casing and the ceiling and also helps to give the casing a flat fitting in the ceiling.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Building Environments (AREA)
  • Installation Of Indoor Wiring (AREA)

Claims (21)

  1. Boîtier résistant à la chaleur (10) pour un élément de raccordement électrique (19), lequel boîtier (10) comprend une enveloppe en matériau résistant au feu comprenant une partie supérieure (11) qui supporte une ou plusieurs parois latérales (12), la partie supérieure (11) est pourvue d'au moins une ouverture (26), l'enveloppe entoure un élément de raccordement électrique (19) qui est fixée sur elle à l'aide de moyens de fixation (16, 18, 20), dans ladite enveloppe un premier matériau solide intumescent résistant au feu (17) est placé entre la surface intérieure de la partie supérieure (11) et l'élément de raccordement électrique (19), l'enveloppe étant une construction autoporteuse globalement rigide, et le premier matériau solide intumescent résistant au feu (17) est pourvu d'au moins une ouverture (29), caractérisé en ce que l'enveloppe est pourvue d'un collier (15) composé d'un second matériau solide intumescent résistant au feu qui s'étend globalement sur tout le tour de la surface extérieure de la ou des parois latérales (12), et le premier matériau solide intumescent résistant au feu (17) est espacé de la surface intérieure de la partie supérieure (11) pour former un espace (16A), de sorte qu'en cas d'incendie ou d'échauffement excessif, ledit premier matériau solide intumescent résistant au feu (17) peut se dilater dans l'espace (16A).
  2. Boîtier résistant à la chaleur (10) selon la revendication 1, caractérisé en ce que l'enveloppe a une section transversale globalement circulaire.
  3. Boîtier résistant à la chaleur (10) selon la revendication 1 ou 2, caractérisé en ce que l'enveloppe est en métal ou en matière plastique.
  4. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le collier (15) est voisin du bord de la paroi latérale (12) qui est éloigné de la partie supérieure (11).
  5. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le collier (15) est placé de telle sorte qu'en cas d'incendie ou d'échauffement excessif il puisse se dilater pour remplir l'espace entre le boîtier (10) et la structure environnante.
  6. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que la paroi latérale (12) éloignée de la partie supérieure a une lèvre (13) qui s'étend vers l'extérieur.
  7. Boîtier résistant à la chaleur (10) selon la revendication 6, caractérisé en ce qu'il est prévu un joint d'étanchéité qui s'étend globalement autour de la surface de la lèvre (13) qui s'étend vers l'extérieur.
  8. Boîtier résistant à la chaleur (10) selon la revendication 7, caractérisé en ce que le joint d'étanchéité est placé de manière à être pris en sandwich, quand le boîtier (10) est installé dans une surface de retenue, entre la lèvre (13) qui s'étend vers l'extérieur et la surface de retenue.
  9. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie supérieure (11) est pourvue de plusieurs ouvertures (26, 27).
  10. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier matériau solide intumescent résistant au feu (17) est pourvu de plusieurs ouvertures (28, 29).
  11. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'enveloppe est également pourvue d'une plaque (16) qui supporte le premier matériau solide intumescent résistant au feu (17).
  12. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier matériau solide intumescent résistant au feu (17) est espacé de la surface intérieure de la partie supérieure (11) par un espace (16A) de 2 à 8 mm.
  13. Boîtier résistant à la chaleur (10) selon la revendication 12, caractérisé en ce que l'espace (16A) mesure de 2 à 5 mm.
  14. Boîtier résistant à la chaleur (10) selon la revendication 11, caractérisé en ce que la plaque (16) est pourvue d'au moins une ouverture (28, 29).
  15. Boîtier résistant à la chaleur (10) selon la revendication 14, caractérisé en ce qu'au moins une ouverture de la plaque (16) coïncide avec au moins une ouverture du premier matériau solide intumescent résistant au feu (17).
  16. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications 11 à 15, caractérisé en ce que l'élément de raccordement électrique (19) est fixé à la plaque (16).
  17. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de raccordement électrique (19) est fixé à l'aide d'un câblage électrique (22) à une enveloppe de bloc de connexion (25) située à l'extérieur du boîtier (10).
  18. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de raccordement électrique (19) est espacé de la surface intérieure de la ou des parois latérales (12).
  19. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de raccordement électrique (19) comprend une douille de lampe.
  20. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier matériau solide intumescent résistant au feu (17) a globalement la même composition que le second matériau solide intumescent résistant au feu (17).
  21. Boîtier résistant à la chaleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est apte à être évidé pour former une structure de support.
EP05744670A 2004-06-18 2005-05-17 Boitier resistant a la chaleur Not-in-force EP1756472B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0413655.2A GB0413655D0 (en) 2004-06-18 2004-06-18 Heat resistant casing
GB0504267A GB2415245B (en) 2004-06-18 2005-03-02 Heat resistant casing
PCT/GB2005/001906 WO2005124225A1 (fr) 2004-06-18 2005-05-17 Boitier resistant a la chaleur

Publications (2)

Publication Number Publication Date
EP1756472A1 EP1756472A1 (fr) 2007-02-28
EP1756472B1 true EP1756472B1 (fr) 2010-04-21

Family

ID=34971514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05744670A Not-in-force EP1756472B1 (fr) 2004-06-18 2005-05-17 Boitier resistant a la chaleur

Country Status (3)

Country Link
EP (1) EP1756472B1 (fr)
AU (1) AU2005255186B2 (fr)
WO (1) WO2005124225A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2421070B (en) * 2005-01-27 2007-01-10 Rd Europe Ltd Fire-resistant cover for lighting fitting
TWM296340U (en) * 2006-03-17 2006-08-21 Giantech Ind Co Ltd Embedded lamp
GB0616948D0 (en) * 2006-08-26 2006-10-04 Si Lite Ltd Convertible Fire Rated Down Lighter
GB2460270A (en) * 2008-05-23 2009-11-25 Bridisco Ltd A fire retardant sleeve for a wall mounted electrical box.
GB0817817D0 (en) * 2008-09-29 2008-11-05 Cole Robert Light fitting
GB2468699A (en) * 2009-03-19 2010-09-22 Warren Hickson Fire proof light fitting
FR2950128B1 (fr) * 2009-09-14 2015-08-07 Marc Joseph Soudat Systeme de fixation indemontable sans outils d'un luminaire encastre dans un plafond
GB201102129D0 (en) * 2011-02-08 2011-03-23 Jones Peter C Recessed light fitting
GB201203260D0 (en) * 2012-02-23 2012-04-11 Scolmore Int Ltd Lighting accessories
GB201302348D0 (en) * 2013-02-11 2013-03-27 Scolmore Int Ltd Heat resistant casing
CN107246566B (zh) * 2017-06-09 2021-02-26 黄世明 一种新型防火嵌灯
US11384929B2 (en) 2020-09-11 2022-07-12 De Brousse & Crémant Inc. Fire rated recessed lighting fixture

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU4311097A (en) * 1996-09-20 1998-04-14 Peter Charles Jones Installation of lighting or other fittings in ceilings
GB9710921D0 (en) * 1997-05-29 1997-07-23 Euro Passive Fire Protection L Ventilated covers for electrical fittings
GB2326467A (en) * 1997-05-29 1998-12-23 Environmental Seals Ltd Downlighter with integral fire-resistant hood
US6447145B1 (en) * 2000-06-30 2002-09-10 Genlyte Thomas Group Llc Glass accent trim plate

Also Published As

Publication number Publication date
WO2005124225A1 (fr) 2005-12-29
EP1756472A1 (fr) 2007-02-28
AU2005255186B2 (en) 2008-02-21
AU2005255186A1 (en) 2005-12-29

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