RU2248499C2 - Pressure-tight luminaire - Google Patents

Abstract

FIELD: light engineering.

SUBSTANCE: luminaire has housing made of insulating material and provided with a gasket inlet, transparent protective cap, light-emitting-diode lamp provided with converter, and contact members of power circuit. The insert which carries the lamp and is made of insulating material is mounted inside the housing. The insert form the safety chamber together with the walls of the housing. The chamber receives the contact members. The insert has insulating pillars provided with screws which allow the lamp to be secured to the insert and tighten the insert with housing and flange through rubber seal of the gasket inlet. The flange has fitting with a standard thread for securing the housing to the pipe and passing the cable for power supply. The housing made of insulating material can be mounted coaxially inside the protective shell which is secured to the flange.

EFFECT: simplified design and enhanced electrical safety.

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Description

The present invention relates to lighting equipment, in particular to light devices, for example, light-signal obstruction lights or lighting devices, in which optical blocks or lamps using LEDs of red, blue, yellow, green radiation or white light are used as light sources.

Sealed lighting devices have a high degree of protection against electric shock, environmental influences and are intended primarily for operation in open space, for example, for light marking of airfields and heliports or for lighting high-rise and long buildings, industrial pipes, masts, repeaters, power transmission towers and etc.

Devices can also be used for decorative illumination of a landscape gardening landscape, as well as for lighting, burglar alarms in the national economy.

Known sealed light-emitting diode fire on LEDs (I), comprising a housing of heat-conducting metal with a sealed protective optically transparent cap and an optical unit mounted on the holder on the LEDs with a converter and contact elements in thermal contact with the housing, as well as sealing and fastening means fire at the facility.

The disadvantages of the prototype are due to the complexity of the design associated with the need to ensure high heat transfer from the LED holder to the housing with sophisticated means of sealing and protection of current-carrying elements, as well as with insufficient electrical protection of the contact elements of the supply network.

The aim of the invention is to remedy these disadvantages - simplifying the design, increasing electrical safety and resistance to environmental influences.

This goal is achieved by the fact that in a sealed light-emitting diode light fixture containing a housing with a sealed optically transparent cap, a light-emitting diode lamp with a converter and contact elements of the supply network, as well as means for sealing and fastening the device at the object, a light-emitting diode support lamp is installed in the said housing an insert made of an insulating material that forms an electrically safe chamber with the housing walls with contact elements of the supply network, and the electrically safe measure interfaced through a packed gland assembly with means of fastening the device on the object.

The goal is achieved by the fact that the LED lamp is mounted on a U-shaped bracket mechanically fixed with screws passing in the hollow insulating racks of the insert through a rubber seal with a flange having a throat with a standard thread for attaching the housing to the pipe and passing the power cable.

The problem is solved by the fact that the LED lamp together with the converter is made with a standard socket, for example E27 and installed in a standard threaded cartridge assembled on the insert.

The technical result is also achieved by the fact that the housing of the insulating material is coaxially mounted in a metal shell mechanically mounted on a flange with a neck and the abutting edge of the expanding part in the housing in the area of its interface with the cap.

Preferred embodiments of the device according to the invention are shown in the drawings.

Figure 1. Sealed LED light fixture, side view, partially in section.

Figure 2. Sealed light fixture with LEDs in a metal sheath, side view, partially in section.

The sealed light fixture shown in FIGS. 1 and 2 comprises a round-symmetric housing 1 made of electrical insulating material, for example, a phenolic plastic, in which an optically transparent protective cap 3 is mounted along the thread 2. An annular sealing ring is placed between the edge of the open part of the housing 1 and the flat annular part of the cap 3 gasket 4, mainly made of silicone rubber.

Inside the sealed space, limited by the walls of the housing 1 and the cap 3, a lamp 5 is mounted on the LEDs 6. The flat bottom of the housing 1 is made with three or more holes 7, one of which (in the central part of the housing) is designed to pass the cable 8 of the power supply network, and the remaining holes, there are screws 9, pressing the flange 10 to the housing 1 through a flat rubber gasket 11. The holes 7 on the back of the bottom of the housing 1 are surrounded by annular protrusions 12, which provide sealing of the cable 8 and screws 9 when compressing another gasket 11 flange 10 in the process of screwing screws 9.

In the housing 1, an insert 13 is made of an electrical insulating material, for example, of phenolic plastic, forming an electrically safe chamber 14 with the walls of the housing, in which the contact elements 15 of the cable 8 and the contact elements 16 are connected, connecting the electronic converter 17 of the lamp 5 to the power supply via a plastic contact block 18 fixed to the liner 13.

The electrical safety chamber 14 is interconnected through a stuffing box sealed by a gasket 11 (gasket 11, flange 10 and screws 9) with means for fastening the device on the object, which are mechanically fixed, for example, by electric welding, to the neck 10 with a standard neck for installation on a reciprocal thread on a pipe (not shown) in which a live cable 8 of the supply network is located. An additional annular gasket can be installed in the neck 19 for sealing the cable and pipe. The liner 13 is made with hollow insulating racks 20, which are placed tightening screws 9.

The lamp 5 on the LEDs is mounted on a U-shaped bracket 21, mechanically fixed by the above screws 9 on the insert 13 and the flange 10 with the neck 19.

In another embodiment (FIG. 2), the LED lamp 5 together with the converter 22 is made with a standard socket, for example E27, and is installed in a standard threaded cartridge 23 assembled on the insert 13.

To protect the device from environmental influences (solar radiation, wind load), the housing 1 of the device from an insulating material (plastic) is coaxially mounted in a metal sheath 24 mechanically mounted on a flange 10 with a neck 19. In this case, the metal sheath 24 abuts against the edge of the expanding part in flanging of the open part of the housing 1 in the area of its interface with the cap 3.

The light fixture functions when it is connected to the mains. In this case, the contact elements 15 of the cable 8 of the supply network are connected to the contact elements 16 of the electronic transducer 17 (Fig. 3) or to the cartridge 23 (Fig. 2) through a plastic contact block 18 inside the electrical safety chamber 14, which significantly increases the electrical safety of the light device, eliminates the need the use of the grounding device, increases resistance to environmental influences. The latter is also achieved through reliable sealing of the stuffing box input and the housing of the device.

Simplification of the design is achieved through the use of an electrically safe chamber, elimination of the screw and grounding tires during operation, as well as by simplifying the means of sealing (seals) of the light device.

Literature

1. Flashing light circular view. Pat. RF №2153623, cl. F 21 S 2/00, bull. No. 21 dated July 27, 2000

Claims (2)

1. A sealed light-emitting diode light fixture, comprising a housing of electrical insulating material with a stuffing box assembly, a transparent protective cap, a LED lamp with a converter and contact elements of the mains installed inside the housing in an electrically safe chamber, characterized in that the carrier lamp is mounted on the housing LEDs, an insulating material made of an electrically insulating material, forming an electrically safe chamber with the walls of the housing, moreover, the insulating element has insulating racks in which Inty holding the LED lamp on the insert and mechanical tightening through the rubber seal assembly gland input pad to the housing and a flange having a neck with a standard thread for fastening of the housing on the pipe and passing the mains cable. 2. The sealed light fixture according to claim 1, characterized in that the housing of electrical insulating material is coaxially mounted in a metal shell mechanically mounted on a flange with a neck and the abutting edge of the expanding part in the housing in the area of its interface with the cap.

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