EP2918908B1 - Système d'éclairage à technologie del avec caractéristiques antidéflagrantes, destiné à être utilisé dans des zones à risque d'explosion - Google Patents

Système d'éclairage à technologie del avec caractéristiques antidéflagrantes, destiné à être utilisé dans des zones à risque d'explosion Download PDF

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Publication number
EP2918908B1
EP2918908B1 EP15158766.4A EP15158766A EP2918908B1 EP 2918908 B1 EP2918908 B1 EP 2918908B1 EP 15158766 A EP15158766 A EP 15158766A EP 2918908 B1 EP2918908 B1 EP 2918908B1
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EP
European Patent Office
Prior art keywords
lighting system
explosion
led
power supply
proof lighting
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
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EP15158766.4A
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German (de)
English (en)
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EP2918908A1 (fr
Inventor
Pier Luigi Marongiu
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Saras Ricerche e Tecnologie SpA
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Saras Ricerche e Tecnologie SpA
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Publication of EP2918908A1 publication Critical patent/EP2918908A1/fr
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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
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/007—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing
    • F21V23/008—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing the casing being outside the housing of the lighting device
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • F21V23/023—Power supplies in a casing
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • F21V23/026—Fastening of transformers or ballasts
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a LED-technology lighting system with explosion-proof characteristics, for use in explosion-risk areas.
  • Electric appliances are commonly used in potentially explosive environments.
  • An explosion may occur in the presence of a potentially explosive atmosphere, i.e. an atmosphere composed of a mixture of air and inflammable substances in the form of gas, vapor, mist or dust, in which, after ignition, combustion propagates rapidly (by explosion) at atmospheric pressure.
  • a potentially explosive atmosphere i.e. an atmosphere composed of a mixture of air and inflammable substances in the form of gas, vapor, mist or dust, in which, after ignition, combustion propagates rapidly (by explosion) at atmospheric pressure.
  • Electric appliances must therefore be so designed as to prevent the risk of an explosion that might be generated by sparks or electric discharges caused, for example, by the switching of electric switches.
  • ATEX ATmospheres EXplosibles
  • ATEX 95 European Directives which concern the risk of explosion in the presence of a potentially explosive atmosphere
  • Casings are classified according to the areas of possible installation (appliances suitable for zone 1, zone 2, etc.) or the type of light source contained therein. As far as the latter is concerned, the most widespread one in ATEX environments is the linear fluorescent tube.
  • One example of a known lamp for ATEX environments consists of a linear fluorescent tube with a casing made up of the following main components (see Figure 1 ): body 1 of polymeric or metallic material, equipped with hooks; diffuser 2 of transparent material (polycarbonate or glass); reflector of metallic material (within the body); lamp (within the body); electronic reactor; cable gland and cable for the internal wiring.
  • the LED technology is not much used in the field of lighting systems for ATEX areas, and anyway it is always employed as a "retrofit” technology, i.e. lamps with shapes and dimensions corresponding to those of traditional ones, which incorporate LED elements and which are intended to replace the light source only, leaving the lighting appliance unchanged or only requiring it to undergo small modifications.
  • the "retrofit” technology poses safety problems as well as problems of compatibility among different technologies, which are not easily solved and which, in most cases, imply losing the product's certifications. Every modification made may cause variations in one or more characteristics of the original product, thus invalidating the analyses made by the manufacturer of the original appliance for obtaining the necessary certifications of compliance with the ATEX standard.
  • every appliance is especially designed for the specific light source it is intended to contain, since every light source has different light emission properties.
  • every light source has different light emission properties.
  • reference standards are still under development in an effort to keep pace with the ongoing technological innovation. This is also a consequence of the fast diffusion of LED systems on the market, which is a direct result of achieved technologic maturity, price reduction and undoubted advantages in terms of energy consumption.
  • US2011242828 shows a LED lighting system with sections having substantially different diameters, which comprises an upper body containing the power supply system and the electric and electronic circuitry, a central body only performing the thermal dissipation function, a lower body containing the lighting system.
  • the arrangement of the bodies of the system of US2011242828 is not optimized for proper heat dissipation.
  • US2013/0286675-A1 shows a LED lighting system wherein the power supply section is arranged on top of the LED lighting section and has a rectangular shape.
  • the lighting section comprises a variable number of side-by-side elements separated from the power supply section.
  • it is necessary to increase the number of side-by-side elements, thus considerably increasing the overall dimensions of the system.
  • LED-technology lighting systems are also known, such as, for example, those described in US2013/0141890 , which have been developed for applications not suited to the above-described ATEX environments.
  • the present invention relates to an explosion-proof lighting system adapted for use in explosion-risk areas, which comprises:
  • the LED-technology lighting system is housed on a support plate adapted to act also as a heat sink.
  • All bodies have a cylindrical shape, are distinct from one another, and are joined axially by means of mechanic and electric connections. All the metallic parts are interconnected in such a way that the heat generated by the power supply unit and by the LED strips can be dissipated also because of the wholly metallic surface of the lighting system.
  • a first variant of the lighting system of the invention represented in Figures 2 , 3.1 and 3.2 , has a substantially cylindrical shape and is made up of two distinct main elements aligned and joined axially by means of suitable mechanic and electric interconnections:
  • the separation of the power supply body from the lamp body allows physical separation of the power supply unit/transformer from the LED sources, and this allows replacing the single elements easily, quickly and economically.
  • the physical separation of the power supply system from the LED sources ensures, at the same time, less overheating of the power supply unit/transformer and junction temperatures (i.e. the temperature of the point where each LED diode is connected to its base) that will not cause a fast decay of the LED lamp that would otherwise shorten the service life thereof.
  • the power mains connection body 3 ( Figure 4 ) comprises the following main elements to be connected: cable gland 41; terminal with internal thread 42, having a hollow and substantially cylindrical shape; VAC connector (female) 43; gasket (O-ring) 44.
  • the power cable which is present in the environment where installation is taking place, is inserted into the cable gland 41 integral with the terminal 42, and is connected to the terminals of the VAC connector 43.
  • the gasket 44 is needed to seal the connection between the terminal 42 and the power supply body 4, when these are connected, by means of the ring nut and the NPT thread.
  • the power supply body 4 ( Figure 5 ) comprises the following main elements: power supply unit/transformer 53, adapted to transform the VAC input voltage into a VDC voltage; cap for the power supply body on the VAC side 51; threaded ring nut 52 on the VAC side; gasket (O-ring) 54; heat sinking cylinder 55 made of light alloy, with a support for the power supply unit; gasket (O-ring) 56; threaded ring nut 57 on the VDC side; cap for the power supply body on the VDC side 58; VAC connector (male) 59; VDC connector (female) 50.
  • the power supply unit/transformer 53 is secured by means of screws into a suitable flat support (not shown in the drawing) provided inside the hollow heat sinking cylinder 55; it is an electronic unit performing functions as a transformer/converter, receiving a VAC voltage (through the connector 59 in Fig. 5 ) and supplying the LED strips, through the VDC connector (connector 50 in Fig. 5 ), with a levelled and stabilized VDC voltage.
  • the power supply unit can be equipped with suitable power selectors (not shown in the drawing) for varying the power as a function of the voltage required by the lamp body.
  • the heat sinking cylinder 55 has suitable radial heat sinking fins so designed as to promote the dissipation of the heat produced by the electronic element, thereby preventing the latter from overheating, which is the main cause of the rapid decay of its service life.
  • the heat sinking cylinder 55 features the caps 51 and 58 of the power supply body. Such caps are tightened by means of screws evenly arranged around the cap circumference, and are sealed by gaskets 54, 56.
  • a connector 59 which is connected to the power supply unit/transformer 53 through electric cables.
  • the electric connection is established by joining together the two VAC connectors (connector 43 in Fig. 4 and connector 59 in Fig. 5 ).
  • the mechanical connection is provided by screwing the ring nut into the terminal.
  • the sealing of the connection is ensured by the presence of the gasket.
  • the VDC connector 50 ( Fig. 5 ).
  • the electric connection is established by joining together said connector to the matching VDC connector 67 ( Fig. 6 ) integral with the lamp body 5.
  • the mechanical connection is ensured by screwing the ring nut into the connection cylinder of the lamp body.
  • the lamp body 5 shown in Figure 6 essentially comprises:
  • the transparent cylindrical tube 63 which contains the lighting part, may be made of self-extinguishing polycarbonate or tempered glass, or borosilicate glass, and is integrally secured (e.g. by gluing or welding) to one end of the connection cylinder 61, while the other end is integrally secured to the threaded sealing cylinder 60 for the engagement of the sealing head 66. Both connections are sealed by the gaskets 62, 65.
  • connection cylinder 61 On the two faces of the connection cylinder 61 there are the following connectors: on the face adjacent to the power supply body there is the VDC connector 67 of Fig. 6 , which is connected to the matching VDC connector 50 ( Fig. 5 ) integral with the power supply body when the connection is established between the lamp body 5 and the power supply body 4. On the inner face of the tube there is the light source connector 68 ( Fig. 6 ), which must be connected to the connector 69 integral with the LED carrier system.
  • the electric connection of the LED sources is established in a simple and direct manner by means of the light source connectors 68, 69 ( Fig. 6 ).
  • the lighting part is connected when the LED carrier system is fully inserted in the tube. This connection is ensured by tightening the threaded sealing head 66 with its gasket.
  • the lighting part consists of a LED carrier system having an elongated profile with a constant cross-section, which will be described in detail below, the side surface of which accommodates LED strips 10 (shown in Figure 10 ) in suitable tracks.
  • the lighting part can be easily replaced by dismounting the sealing head 66 and extracting the LED carrier system 64.
  • the LED carrier system 64 is supported within the transparent tube 63 in such a way that it can slide on guides 81, 82 formed in the inner part of the transparent tube 63, in opposite positions on the inner surface.
  • the LED carrier system 64 is locked into the guides within the transparent tube when the terminal head 66 is fastened to the transparent tube.
  • the LED carrier system 64 is supported within the transparent tube 63 by means of a metallic guide 85 internal to the transparent tube 63 and adapted to allow the LED carrier system to slide.
  • the metallic guide 85 is arranged longitudinally and is integral, at one end, with the face (on the lamp body side) of the connection cylinder 61, is locked and at the other end by the sealing head 66.
  • the metallic guide 85 provides the necessary support for the insertion and extraction of the LED carrier system 64, and may have a circular or rectangular cross-section, with different proportions between its sides.
  • the LED carrier system 64 has been developed (some examples of which are shown in Figures 7.1, 7.2, 7.3 ) in order to fulfill various needs in terms of illumination and installed power.
  • different irradiation diagrams can be obtained with variable angular sectors, even with the same number of LED carrier strips.
  • the system of Fig. 7.1 has a straight profile cross-section, with an in-line arrangement of the strips towards the same lighting direction.
  • the system of Fig. 7.2 has a cross-section with a convex profile, with a divergent strip arrangement, thus providing an irradiation diagram with a larger angular sector towards the same lighting direction.
  • the system of Fig. 7.3 has a profile cross-section with double convexity, with the strips arranged on opposite sides, thus providing an omnidirectional irradiation diagram.
  • Installed power and/or illumination can be varied by simply changing the number of LED strips or the LED carrier system; this gives the system great flexibility.
  • the dimensions of the lamp body and of the power supply body may vary according to the dimensional and illumination parameters that must be guaranteed in each specific installation.
  • the lighting system can be equipped with a luminous flux orientation system obtained on a mechanical interconnection of the lamp body, in particular in the threaded cylinder 60 ( Figure 9 ), in the form of a ring nut, the outer edge of which shows indications about the orientation angle of the light beam (-45° & +45°).
  • a luminous flux orientation system obtained on a mechanical interconnection of the lamp body, in particular in the threaded cylinder 60 ( Figure 9 ), in the form of a ring nut, the outer edge of which shows indications about the orientation angle of the light beam (-45° ).
  • the following performance characteristics can be obtained from the system.
  • FIG. 11 An example of installation of the LED-technology lighting system is shown in Fig. 11 , which comprises a support pole 111, suspensions 112, 113.
  • the lighting system of said variant has a substantially cylindrical structure and essentially comprises, just like the previously described variant:
  • the three elements are aligned and joined axially, are completely independent, and are connected together by means of mechanical interconnections, e.g. through suitable connectors and a sealing system including a ring nut, NPT threads and gaskets. These elements are also electrically connected to one another by means of electric interconnections.
  • LED strip kit ( Figures 15.1, 15.2, 15.3 ), which comprises strips equipped with SMD (Surface Mounting Device) LEDs.
  • the strips can be installed within the lighting system, and their number may vary, for example, from one to six.
  • the strips can be easily separated and may also be bent, such that the two lateral strips will form angles of, for example, ⁇ 15° with the central strip.
  • the materials used for manufacturing the main parts of the lighting system are, for example:
  • the lamp body 5.1 may be enclosed in and protected by a removable external protection grid (not shown).
  • the power mains connection body 3.1 preferably comprises ( Fig. 16 ):
  • the power mains connection body 16.1 is also fitted with an NPT threaded housing 16.5 for an Exd cable gland (1 ⁇ 2", 3 ⁇ 4", 1") to provide the interface for the external mains cable.
  • a hole is provided for housing a cylindrical pin between the terminal 16.1 and the power supply body 4.1.
  • the power supply body 4.1 comprises the following elements ( Figures 14.1, 14.2, 14.3 ): ring nuts 14.1;
  • the ring nuts 14.1 can slide, ensuring the coupling of the heat sink to the terminal 16.1 belonging to the power mains connection body 3.1, on one side, and to the connection cylinder 13.1 ( Figures 13.1 and 13.2 ) belonging to the lamp body 5.1, on the other side.
  • These couplings are preferably implemented by means of M90 cylindrical threads having a 2mm pitch and being 20mm long.
  • the stroke of the ring nuts 14.1 on the heat sink 14.2 is limited by the circular crown 14.12 formed on the heat sink itself or provided on the heat sink terminal.
  • the heat sink terminal 14.3 is connected to the heat sink 14.2 through a suitable M58 cylindrical thread 14.13.
  • the power supply unit plate 14.4 ( Fig. 14.1 ) is provided with holes, two of which are used for fastening the power supply unit 14.6 by means of suitable screws 14.11. Other holes are used for fastening the plate 14.4 within the heat sink 14.2, through a connection implemented by means of the systems for supporting/fastening the power supply unit plate 14.9. Finally, there is a hole for the grounding system 14.10: a suitable grounding screw is inserted into this hole to clamp the grounding cable.
  • the lamp body 5.1 comprises the following elements ( Figures 12.3 , 13.1, 13.2 ):
  • the coupling between the glass part and the metal part is made by connecting the ends of the transparent cylindrical tube 13.5 to the connection cylinders 13.1, e.g. by elastic gluing through a suitable adhesive having a minimum sealing length of 10 mm.
  • tie rod 13.3 Inside the transparent cylindrical tube 13.5 the tie rod 13.3 is housed, which slides within the holes 15.1 formed in the LED board support 13.4.
  • the tie rod is fastened by means of the tie rod terminals 13.2, which are housed on the connection cylinders 3.1, and the rotation of which is prevented by the above-mentioned pins.
  • the tie rod terminals have suitable protrusions 13.8 that engage with the terminal parts 15.2 of the LED board support, so as to prevent the support from translating and rotating.
  • Apertures 13.9 are formed on the tie rod terminals to allow easy extraction and reinsertion, e.g. for maintenance.
  • the LED board support 13.4 ( Figures 15.1, 15.2, 15.3 ) is advantageously adapted to facilitate the thermal dispersion of the heat produced by the LED strips 13.8, and is characterized by two LED strip support planes 15.3 having a trapezoidal cross-section, with side wings protruding relative to the central part, and preferably having a certain inclination, e.g. 15° relative to the central part, a central hole 15.1 for inserting the tie rod 13.3; the structure comprising the side wings promotes dissipation of the produced heat.
  • connection cylinders 13.1 are provided with external cylindrical gas threads for connecting to the lamp body terminal 5.11 provided with a similar internal thread, on one side, and to the power supply body 4.1 by means of the ring nut 14.1 provided with a similar internal cylindrical thread, on the other side.
  • the O-rings employed in the system are preferably gaskets with a continuous operating temperature > 150°C.
  • the LED-technology lighting system is housed on a support plate adapted to act also as a heat sink.
  • All bodies of the system have a cylindrical shape, are distinct from one another, and are joined axially by means of mechanic and electric connections.
  • the lighting system is structured in a manner such that it ensures metallic continuity throughout its length.
  • All the metallic parts are interconnected in such a way that the heat generated by the power supply unit and by the LED strips can be dissipated also because of the wholly metallic surface of the lighting system. It is understood that the non-metallic parts of the system are the transparent cylindrical tube, the single LEDs, the O-rings, the gluing material, some elements of the power supply unit, the container thereof; all the other parts are metallic.
  • the lighting system of said variant essentially comprises:
  • this further variant is created by using components which are wholly equivalent to those described with reference to the preceding variant, wherein all the components of the power supply body are absent ( Figures 14.1 - 14.3 ), while the components of the power mains connection body (e.g. designed as described with reference to Figures 16 , 12.1, 12.2, 12.3 ) provide a direct connection to the components of the lamp body (e.g. designed as described with reference to Figures 12.1 to 15.4 ).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Claims (14)

  1. Système d'éclairage antidéflagrant destiné à être utilisé dans des zones à risque de déflagration, comprenant :
    - un corps d'alimentation électrique (4, 4.1) équipé d'un dissipateur thermique ayant une forme sensiblement cylindrique ;
    - un corps de lampe (5, 5.1), dans lequel un système d'éclairage (64, 10, 13.4, 13.8) basé sur la technologie des DEL est inséré, le système d'éclairage étant logé sur une plaque de support adaptée pour servir de dissipateur thermique ;
    - un corps de connexion au secteur électrique (3, 3.1) ;
    ledit corps d'alimentation électrique, ledit corps de lampe (5, 5.1) et ledit corps de connexion au secteur électrique (3, 3.1) ayant une forme essentiellement cylindrique et étant chacun distincts, alignés, et assemblés axialement par des interconnexions mécaniques et électriques, ledit corps de connexion au secteur électrique étant situé sur le côté du corps d'alimentation électrique.
  2. Système d'éclairage antidéflagrant selon la revendication 1, dans lequel ledit corps d'alimentation électrique (4, 4.1) comprend :
    - une unité/un transformateur d'alimentation électrique (53, 14.6), adapté pour transformer la tension d'entrée en une tension à fournir audit système d'éclairage (10, 13.8) ;
    - ledit dissipateur thermique est un cylindre de dissipation thermique creux (55, 14.2), adapté pour contenir à l'intérieur et totalement ladite unité/ledit transformateur d'alimentation électrique (53, 14.6) ;
    - des bouchons latéraux (51, 52, 57, 58, 14.1, 14.13) pour ledit cylindre de dissipation thermique (55, 14.2), étanchéifiés au moyen de joints d'étanchéité (54, 56, 14.5).
  3. Système d'éclairage antidéflagrant selon la revendication 2, dans lequel ledit cylindre de dissipation thermique creux (55, 14.2) est pourvu d'ailettes de dissipation thermique radiales, ou d'une surface latérale externe sensiblement lisse.
  4. Système d'éclairage antidéflagrant selon la revendication 1, dans lequel ledit corps de lampe (5, 5.1) comprend :
    - ledit système d'éclairage (64, 10, 13.4, 13.8), comprenant un système porteur de DEL (64, 13.4) et une ou plusieurs bandes de DEL (10, 13.8) appliquées sur une ou plusieurs surfaces latérales dudit système porteur de DEL (64, 13.4) ;
    - un tube cylindrique transparent (63, 13.5) adapté pour contenir totalement ledit système d'éclairage (64, 10, 13.4, 13.8) ;
    - des bouchons latéraux (60, 61, 66, 13.1, 13.2, 5.11) pour ledit tube cylindrique transparent (63, 13.5), étanchéifiés au moyen de joints d'étanchéité (62, 65, 13.6), l'un desdits bouchons latéraux comprenant des raccords électriques (67, 68) vers ledit corps d'alimentation électrique (4, 4.1) et vers ledit système d'éclairage (10, 13.8).
  5. Système d'éclairage antidéflagrant selon la revendication 4, dans lequel ledit système porteur de DEL (64) est adapté pour être contenu dans ledit tube cylindrique transparent (63), de façon à pouvoir coulisser le long de guides (81, 82) formés sur la surface interne dudit tube cylindrique transparent (63).
  6. Système d'éclairage antidéflagrant selon la revendication 4, dans lequel ledit système porteur de DEL (64, 13.4) est adapté pour être contenu dans ledit tube cylindrique transparent (63, 13.5), de façon à être supporté de façon amovible par un guide ou tirant métallique (85, 13.3) agencé longitudinalement au sein du tube cylindrique transparent (63, 13.5).
  7. Système d'éclairage antidéflagrant selon la revendication 4, dans lequel ledit système porteur de DEL (64, 13.4) a une forme allongée avec une section transversale constante, une ou plusieurs desdites surfaces latérales ayant un profil droit.
  8. Système d'éclairage antidéflagrant selon la revendication 7, dans lequel ledit système porteur de DEL (13.4) comprend deux plans de support (15.3) pour lesdites une ou plusieurs bandes de DEL (13.8) avec des oreilles latérales faisant saillie par rapport à la partie centrale, un trou central (15.1) pour l'insertion d'un tirant (13.3), lesdites oreilles latérales étant de préférence inclinées par rapport à la partie centrale.
  9. Système d'éclairage antidéflagrant selon la revendication 6, dans lequel ledit guide ou tirant métallique (13.3) est arrimé au niveau des deux extrémités au moyen de bornes de tirant (13.2) comprenant des saillies (13.8) qui s'ajustent dans les parties de borne (15.2) dudit système porteur de DEL (13.4).
  10. Système d'éclairage antidéflagrant selon la revendication 1, dans lequel ledit corps de connexion au secteur électrique (3.1) comprend un système de mise à la terre (16.3), et un trou fileté (16.5) pour l'insertion d'un presse-étoupe avec un câble électrique.
  11. Système d'éclairage antidéflagrant selon la revendication 4, dans lequel ledit tube cylindrique transparent (63, 13.5) est réalisé en polycarbonate auto-extinguible ou en verre trempé, ou en verre borosilicaté.
  12. Système d'éclairage antidéflagrant selon l'une quelconque des revendications précédentes, dans lequel ledit corps d'alimentation électrique (4, 4.1), ledit corps de lampe (5, 5.1) et ledit corps de connexion au secteur électrique (3, 3.1) comprennent des éléments métalliques interconnectés les uns aux autres de façon à assurer une continuité de métal sur toute la longueur du système d'éclairage antidéflagrant à des fins de dissipation thermique.
  13. Système d'éclairage antidéflagrant selon l'une quelconque des revendications précédentes, comprenant un système d'orientation de flux lumineux adapté pour mettre en rotation ledit système d'éclairage afin d'orienter ledit flux lumineux dans une ou plusieurs directions souhaitées.
  14. Système d'éclairage antidéflagrant selon la revendication 13, dans lequel ledit système d'orientation de flux lumineux comprend un écrou à oeil (60) ou similaire, dont le bord externe montre des indications concernant l'angle d'orientation du flux lumineux.
EP15158766.4A 2014-03-12 2015-03-12 Système d'éclairage à technologie del avec caractéristiques antidéflagrantes, destiné à être utilisé dans des zones à risque d'explosion Not-in-force EP2918908B1 (fr)

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