Explosion-proof light-emitting diode strip

Abstract

The invention relates to lighting technology, and more particularly to the structure of a light-emitting diode strip for use in underground spaces, coal mines, oil and gas production facilities, gas production facilities, tunnels, and industrial zones and other explosion-hazardous areas. An explosion-proof light-emitting diode strip comprises a copper-plated electrically conductive substrate with soldered-on light-emitting diodes and electrical components which is mounted in a rigid transparent casing with soldered-in mutually insulated leads and an absence of cavities, and is configured to permit connection to a power cable at both ends, connection to a power supply and the formation of a line of lighting, wherein the explosion-proof light-emitting diode strip is further configured to permit the extension of a line of lighting by means of a cable, permanently connected to the strip, and an explosion-proof connecting sleeve, or by means of a connector cable. The technical result includes: a more reliable and durable structure, a wide range of operating temperatures, the distribution of uniform lighting, improved safety, the possibility of quick and easy replacement of component parts with a return to full functionality, the possibility of connection to cables and wires with various cross-sections (1.5-6 mm), and a greater possible extension of the lighting from a power supply, thus permitting use in long galleries.

Description

[0001] LED STRIP EXPLOSION-PROOF

[0002] Field of technology to which the invention relates

[0003] The invention relates to lighting technology, in particular to the design of an LED strip for use in underground spaces, coal mines, oil and gas stations, tunnels, industrial and other explosive areas.

[0004] State of the art

[0005] Explosion and fire hazardous areas may contain flammable liquids, gases, vapors, and dust in varying concentrations. Under the influence of heat or even a relatively small spark, which can easily occur during the operation of ordinary lighting equipment or the switch used in it, significant destruction in the form of an explosion or other similar phenomena may occur, particularly in an oil refinery, mine, or factory, the space of which may be very densely filled with dangerous flammable materials located in a limited volume of atmosphere.

[0006] A lighting device for explosion and fire hazardous areas is known from the prior art (RU2745668C2, 30.03.2021). The lighting device comprises a point light source, a housing structure for said at least one light source, forming at least a three-barrier protective capsule containing an outer tube, an inner tube and a completely encapsulating central component inside the inner tube and providing complete sealing and insulation of said at least one light source and an electrical board and / or contacts from the environment, and a removable closing component at each end of the inner tube and the outer tube in the housing structure. The outer tube forms a first protective barrier from the environment, the inner tube forms a second protective barrier from the environment, and the central component forms a third protective barrier from the environment.Between the inner tube and the outer tube there is a gap filled with a gas, such as air, wherein the outer tube, the inner tube and the central component are optically transparent with the provision of the possibility of light propagation at specified wavelengths from the said at least one source into the environment. At least one tube from the outer tube and the inner tube contains optically functional means for controlling light, wherein the optically functional means are defined as three-dimensional surface relief structures for providing the required light distribution.The disadvantages of this device are the complexity of its design, insufficient reliability, durability and safety, as well as the lack of the ability to increase the distance of the lighting from the power source with the possibility of use in long workings and insufficient uniform lighting, the lack of the ability to easily and quickly replace components with full restoration of functionality, and the ability to connect to cable and wire products of different cross-sections.

[0007] Disclosure of invention

[0008] The technical task is to create a lightweight, durable and hermetic explosion-proof LED strip that is resistant to impacts and stretching, does not support combustion and has a wide range of operating temperatures, which allows to increase the reliability and durability of the strip, also providing uniform lighting in underground mine workings, protection from electric shock of workers and maintenance personnel, preventing the risk of ignition of a methane-air mixture, increasing safety in general, reducing the likelihood of accidents in the workplace and providing additional warning measures during evacuations, while having the ability to easily and quickly replace components with full restoration of operability, allowing to make connections with cable and wire products of different cross-sections (2.5-4 mm), which also allows to significantly increase the distance of lighting from the power source.

[0009] Technical result: increasing the reliability and durability of the structure, ensuring a wide range of operating temperatures, ensuring uniform illumination, increasing safety, ensuring the possibility of simple and quick replacement of components with full restoration of operability, ensuring the possibility of connection with cable and wire products of different cross-sections (2.5-4 mm), increasing the distance of lighting installation from the power source with the possibility of use in long workings.

[0010] The technical result is achieved due to the fact that the explosion-proof LED strip contains a copper-plated current-carrying substrate with soldered LEDs and electrical components installed in a rigid transparent shell with current-carrying cores insulated from each other and soldered in without voids, and is designed with the possibility of connecting to a power cable from both sides, connecting to a power source and forming a lighting line, wherein the explosion-proof LED strip is designed with the possibility of extending the lighting line through a permanently connected adhesive cable and a connecting explosion-proof coupling or through a cable connector. In addition, the place of connection of the strip with the power cable is pressed with a plastic casting material under pressure to form a sealed permanent connection.

[0011] In addition, the connection of the tape to the power source and to the junction box is made through a cable connector or a cable permanently attached to the tape.

[0012] In addition, the explosion-proof connecting coupling is designed with the possibility of connecting the tape to the cable with a modification of the cable cross-section of 1.5-6 mm.

[0013] In addition, the transparent shell is made of polymer material and has an antistatic coating.

[0014] Brief description of the drawings

[0015] Fig. 1 - Explosion-proof mine LED strip;

[0016] Fig. 2 - Explosion-proof mine LED strip with shielded power cable;

[0017] Fig. 3 - Explosion-proof mine LED strip with a shielded power cable, connected by a coupling;

[0018] Fig. 4 - The coupling connecting the LED strip and the power cable.

[0019] The following elements are marked with positions on the figure:

[0020] 1 - LED strip;

[0021] 2 - Shielded power cable;

[0022] 3 - Connector;

[0023] 4 - Connecting wires: "zero", "phase", "ground";

[0024] 5 - Current-carrying printed circuit board;

[0025] 6 - LEDs;

[0026] 7 - Hard silicone shell;

[0027] 8 - Compensating resistor;

[0028] 9 - Compensating resistor;

[0029] 10 - Transistor amplifier;

[0030] 11 - Coupling housing.

[0031] Implementation of the invention

[0032] The declared LED strip is designed as energy-efficient explosion-proof lighting and zone indicator for mines and other underground zones requiring special attention of working personnel, which is aimed, among other things, at reducing accidents at workplaces, as well as additional warning measures during evacuations. The explosion-proof LED mine strip 1 consists of a conductive copper-plated substrate (printed circuit board) 5 with soldered LEDs 6 and electrical components.

[0033] The number of LEDs 6 and components per meter of tape may vary depending on the modification of the final product.

[0034] The LED strip 1 is completely enclosed in a rigid transparent shell 7 made of a polymer material, for example, plastic PVC, with current-carrying wires 4 insulated from each other, soldered into the strip, with no voids, connecting the strip to the power cable 2 on both sides.

[0035] The junction of tape 1 and output power cable 2 is pressed with plastic molding material under pressure, forming a hermetic permanent connection. Such material can be Silagerm compound or similar.

[0036] The tape can be produced in sections from 1 m to 20 m long.

[0037] The connection of the tape to the power source and to the junction box is performed through a connector cable or permanently attached to the tape.

[0038] The LEDs are protected with silicone compound, "sealing with compound "T"" according to GOST 31610.18-2016 / IEC 60079-18:2014 with the design being implemented in accordance with the requirements of GOST 31610.0-2014 (IEC 60079-0:2011).

[0039] If necessary, the lighting line can be extended via a permanently attached cable to the tape and a connecting sleeve or cable connector when connecting to intrinsically safe circuits. The sleeve is explosion-proof, hermetically sealed with compound, and allows for connecting tape-cable-tape-cable structures with a cable cross-section modification of 1.5-6 mm.

[0040] In essence, these are lightweight and durable, sealed and antistatic LED strips made of polymer silicone, connected by a cable, forming lighting lines for underground areas up to 500 m long or more, which allows them to be used even in long workings.

[0041] As tests have shown, the use of this type of lighting allows to increase its service life to 50 thousand hours (instead of 12-15 thousand for traditional lighting systems) and reduce the power consumption by 5-10 times.

[0042] The explosion-proof mine LED strip is designed for use in underground spaces, coal mines, oil and gas stations, tunnels, industrial and other explosive zones, developed in accordance with TR CU 012 / 2011 "On the safety of equipment for work in explosive environments":

[0043] - for explosive gas environments - classes 0.1 and 2,

[0044] - for explosive dust environments - classes 20, 21 and 22.

[0045] It is also possible to manufacture the tape in the execution of one-, two- and three-phase connections. The declared LED tape has many advantages:

[0046] • Provides uniform lighting in underground mine workings that are hazardous due to gas and dust, not lower than the standards established by GOST 55733-2013 “Lighting of underground mine workings”;

[0047] • Provides protection against electric shock for workers and maintenance personnel;

[0048] • Does not create a risk of ignition of the methane-air mixture (MAM) in mine workings that are hazardous due to gas and dust;

[0049] • Has an antistatic coating that ensures complete distribution of the electrical static charge over the surface;

[0050] • Does not require external forced cooling;

[0051] • Manufactured in an intrinsically safe design;

[0052] • The casing is resistant to impacts and stretching, does not support combustion;

[0053] • Has a wide operating temperature range -40 +40°С;

[0054] • Connection using explosion-proof boxes (quick-release connections);

[0055] • Functional units have design elements that prevent their incorrect connection.

[0056] In addition, the design of the components allows for simple and quick replacement with full restoration of functionality.

[0057] It is possible to produce an individual LED continuous assembly structure according to the cable-tape-cable-tape-cable scheme, where the length of each section of the cable is made according to the customer's requirements, the length and choice of color (white / red / yellow / green) of each section of the tape from 1 to 20 meters is made according to the customer's requirements, and the number of sections of the cable and tape are also made according to the customer's requirements.

[0058] Thus, it is possible to implement both a single-color solution, for example, white for conveyor belt lighting, and a color solution (white for lighting, yellow for getting ready to leave, red for leaving the vehicle) for belt conveyor exit areas, and the connecting sleeve additionally allows for connections with cable and wire products of different cross-sections (1.5-6 mm), which in turn allows for a significant increase in the distance of lighting from the power source. Another advantage of this sleeve is that it is possible to use a continuous connection of the light strip and cable without using metal, heavy, expensive junction boxes. The connecting sleeve weighs no more than 150 grams and provides explosion protection and moisture and dust protection for the lighting product.

[0059] The declared LED strip, made in the manner described above, has increased reliability and durability, can be used in a wide range of temperatures, providing uniform illumination and high safety during operation, has the ability to easily and quickly replace components with full restoration of operability, provides the ability to connect to cable and wire products of different cross-sections (1.5-6 mm), has the ability to increase the distance of lighting from the power source with the ability to use in long workings.

Claims

CLAUSE OF INVENTION 1. An explosion-proof LED strip, characterized in that it contains a copper-plated current-carrying substrate with soldered LEDs and electrical components, installed in a rigid transparent casing with current-carrying cores insulated from each other and soldered in without voids, and is designed with the possibility of connecting to a power cable on both sides, connecting to a power source and forming a lighting line, wherein the explosion-proof LED strip is designed with the possibility of extending the lighting line through a cable permanently connected to the strip and a connecting explosion-proof coupling or through a cable connector.

2. The LED strip according to item 1, characterized in that the place where the strip is connected to the power cable is pressed with a plastic molding material under pressure to form a sealed, permanent connection.

3. The LED strip according to item 1, characterized in that the connection of the strip to the power source and to the junction box is made via a cable connector or a cable permanently connected to the strip.

4. The LED strip according to item 1, characterized in that the explosion-proof connecting sleeve is designed with the possibility of connecting the strip to a cable with a modification of the cable cross-section of 1.5-6 mm.

5. The LED strip according to item 1, characterized in that the transparent shell is made of a polymer material and has an antistatic coating.

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