Explosion-proof lighting manufacturers AND explosion-proof explosion-proof lamp prices
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2. According to the explosion-proof type, it can be divided into 5 types: flameproof, increased safety, positive pressure, non-sparking and dust explosion-proof. It can also be combined by other explosion-proof types and the above-mentioned various explosion-proof types or composite type and special type. .
3. According to the type of protection against electric shock can be divided into I, II, III category. The protection against electric shock is to prevent the explosion-proof lamp housing from being easily touched and the parts are electrified, so that the human body is exposed to electric shock or conductors with different potentials to generate electric sparks and ignite the explosive mixture.
AI class—On the basis of basic insulation, accessible conductive parts that are not energized during normal operation are connected to the protective ground conductor in the fixed line.
Class BII - Use double insulation or reinforced insulation as a safety measure without grounding protection.
Class CIII - Use a safe voltage with an effective value of not more than 50V, and no voltage above it will be generated.
Category D0 - only rely on basic insulation as a safety protection measure.
Most of the explosion-proof lamps and lanterns are protected against electric shock and they are Class I and only a few are Type II and Type III lamps. For example: all plastic explosion-proof lamps, explosion-proof flashlight Jane.
4. Classified according to the protection class of the enclosure: In order to protect the dust, solid foreign matter and water from entering the lamp cavity and touching or accumulating on the live parts to cause flashover, short circuit or damage to the electrical insulation, etc., there are a variety of enclosure protection methods to protect the electrical Insulation effect. The characteristic letter "IP" followed by two digits is used to characterize its enclosure protection level. The first number indicates the protection against humans, solid objects or dust. Divided into 0-6 levels. Explosion-proof lamps are sealed lamps. Their dust-proof capacity is at least 4 levels. The second number indicates the protection against water and is classified into 0-8.
5. According to the lighting design of the support surface material classification: Indoor explosion-proof lighting may be installed on many common surfaces of combustible materials, such as wooden walls and ceilings, which do not allow explosion-proof lighting installation surface temperature exceeds the safety value. According to whether explosion-proof lamps can be installed directly on the surface of ordinary combustible materials, they can be classified into two categories.
One category is lamps that are only suitable for installation on non-flammable surfaces.
The other category is lamps that are suitable for direct installation on the surface of ordinary combustible materials and are marked with symbols.
6. According to the use of the installation can be divided into fixed, portable, portable. Principles of the Flameproof Type According to the concept of explosion protection and fire protection of the European standard EN13463-1:2002 "Non-electrical equipment for explosive atmospheres Part 1: Basic methods and requirements", the flameproof type adopts measures to allow internal explosion and prevent flame propagation. Explosion-proof type, is the most commonly used type of explosion-proof. Since the explosion-proof type lamp housing is generally made of a metal material, the heat dissipation is good, the strength of the housing is high and the durability is good, and it is very popular with users. Moreover, many increased safety explosion-proof lighting components, such as lamp holders, interlock switches, etc., are also flameproof structures. An electrical device with a flameproof enclosure is called a flameproof electrical device. If the explosive gas mixture enters the flameproof enclosure and is ignited, the flameproof enclosure can withstand the explosive pressure of the internal explosive gas mixture and prevent the internal explosion from propagating to the explosive mixture around the enclosure. This is a kind of clearance explosion-proof principle, that is, a structure designed by using the metal gap to prevent the propagation of the explosion flame and cool down the temperature of the explosion product, to achieve flame extinction and temperature reduction, and to suppress the expansion of the explosion principle.
Explosion-proof lighting types Explosion-proof lighting: mainly used for flammable and explosive places, divided into explosion-proof fluorescent lamps, explosion-proof floodlights, explosion-proof floodlights, explosion-proof induction lamps, explosion-proof explosion-proof lamps, explosion-proof LED Lights, explosion-proof platform lights, explosion-proof street lights and other explosion-proof emergency lighting: mainly used for flammable and explosive places for emergency use, divided into explosion-proof lights, explosion-proof emergency lighting and other explosion-proof signal lamps: mainly used in flammable and explosive places Command signal, divided into explosion-proof sound and light alarm lights, explosion-proof aviation signal light explosion-proof anti-corrosion lamps: mainly used for flammable and explosive corrosion sites: divided into safety explosion-proof anti-corrosion lamps, stainless steel explosion-proof anti-corrosion lamps and other explosion-proof lighting design In the structural design of explosion-proof lighting fixtures, manufacturers often focus on the design and strength of the flameproof enclosure, but often overlook the fasteners, lead-in devices, transparent parts, suspension devices, signs, etc. that are integral with the enclosure. The design of the device. Next, according to the requirements of GB3838.2-2000 “Electrical Equipment for Explosive Gas Environments Part 1: Flameproof Type “dâ€â€, some issues needing attention in the structural design are analyzed:
(1) Case Fasteners There are two types of flameproof enclosures that are fastened with bolts: flat and spigot. For flat structures, the bolts not only perform tightening operations, but also ensure the plane clearance. For the stop structure, when the flameproof surface only considers the cylinder part, the bolt only plays a fastening role; when the flameproof surface needs to consider the cylinder plus the plane, the bolt not only acts as a fastening operation, but also plays a role in ensuring the clearance of the plane part. When tapping directly on the shell, attention must be paid to the following: Screw holes of fasteners should not pass through the flameproof enclosure as much as possible, and 3mm or more of the margin should be left at the bottom of the screw hole when passing through the shell; light alloy materials such as aluminum alloy should be used to separate them. When blasting the shell, due to the low strength of the aluminum alloy, when using the screws to fasten the explosion-proof shell that is often opened (such as when the replacement light source needs to be opened), the threads should not be tapped directly on the aluminum alloy shell; The internal and external thread steel sleeves are used to increase the screw hole strength and prevent failure due to thread rotting; it is not necessary for the user to open the replacement light source or maintenance, and the bolts already installed at the factory can be tapped directly on the shell. Screw hole, but can not use fine thread, try to use coarse thread, and there is enough engagement to meet the fastening requirements.
In short, in the design of shell fasteners, it should first distinguish its role in the flameproof enclosure, is only to play a role in fastening, or both to play at the same time to ensure the role of plane clearance, and then determine the maximum axial bolt Use suitable bolts for the load.
(2) Introduction The introduction of cables and wires can be connected by the following two methods:
a) indirect introduction, connection by junction box or plug-in device;
b) Directly introduce the connection of cables and wires directly to the main housing. It is worth noting that the seal can burn or explode directly when the aging or pressure is not tight.
Therefore, explosion-proof luminaires classified as Class IIC are not suitable for generating hazardous sparks, arcs or dangerous temperatures during normal operation and whose enclosure volume is greater than 50000px3 or GB3836.1 "Electrical Equipment for Explosive Gas Environments Part 1: General Requirements". The elastic sealing ring presses the direct introduction method. Although GB3836.2 does not describe this, GB3836.15-2000 “Electrical Equipment for Explosive Gas Environments Part 15: Electrical Installation in Hazardous Locations (Excluding Coal Mines)†regulates this. Through the cable introduced into the fixture through the introduction device, from the installation to the use of the entire process, if possible to be subject to tension, the introduction of the device on the compression nut or close to the introduction of the device inside the lamp to increase the cable pull-out pressure plate to prevent the force transmitted to the terminal block Prevents possible movement of the cable and prevents contact or failure of the electrical connection. Lamps may need to be provided with more than one lead-in device at design time to facilitate different installation requirements of the user. All sealing devices shall be installed at the time of shipment from the factory. The structure of the sealing device must be suitable for explosion protection. Alternatively, only one lead-in device is installed, and the remaining holes (after removal of the lead-in device) are replaced by plugs suitable for explosion protection. In this way, the failure of the flameproof enclosure will not be caused by the unintended plugging of the lead-in device.
(3) Installation of transparent parts Explosion-proof lamps cannot be separated from transparent parts, but transparent parts are the components with the lowest strength in the shell parts. Therefore, whether or not the transparent parts are installed directly affects the safety performance of the explosion-proof lamps.
The following analysis of three commonly used transparent parts installation method: a) directly sealed in the shell, forming a whole with the shell. This method is simple, practical and widely used. Sealing materials should be selected from rubber parts that are resistant to temperature and oil, or adhesives such as epoxy resin can be used to seal the transparent parts in the housing and press them tightly.
b) Secure the transparent member directly in the housing with or without a gasket. The flatness of the bonding surface of the transparent member is not required when the gasket is not used, and is generally suitable for a small flat glass and the glass bonding portion is polished at the same time. Otherwise, the glass is not uniformly subjected to stress and is easily broken.
c) Sealed or glued to a frame that is secured within the housing so that the transparent member can be replaced as a whole. This kind of structure is rarely used in luminaires. In some large devices that require frequent replacement of transparent parts, the transparent parts and the frame are replaced as a single unit.
The sealing of the transparent member and the frame can refer to the type of a). In terms of structure, the force (inner explosion) received by the transparent member should be directly transmitted to the metal shell as far as possible, and it is not suitable to pass the transparent platen and/or screws to the metal shell. At the same time, the transparent member is installed. Can not be subjected to stress, so as to ensure reliable combination of transparent parts and shell.
High-strength gas discharge lamp is used as the light source in the applicable environment, with high luminous efficiency, long service life, and an average life span of up to 10,000 hours; power factor greater than 0.9, high luminous efficiency, and good light transmission.
Reliable and convenient: The use of high-strength alloy shell, high-tech surface coating process and sealing treatment, waterproof, dustproof, wear-resistant and anti-corrosion; can be used in the harsh environment of high temperature and humidity and various corrosive and other long-term use.
The installation method has good electromagnetic compatibility and will not cause interference to the surrounding environment. Exquisite structure design, good heat dissipation, effectively reduce the lamp body temperature, improve the lamp life; light weight, small size, compact appearance, simple and convenient operation.
The applicable scope of selection is as follows:
Suitable for fixed lighting in petrochemical devices, oil platforms, gas stations, oil pump rooms, transfer stations, pharmaceutical plants, food factories, flour mills and other flammable and explosive places; explosive gas atmospheres in Zone 1, Zone 2; flammable in Zones 21 and 22 Dust environment; temperature group is T1-T6 environment.
The main technical parameters rated voltage AC220V/50Hz
Protection class IP65
Anti-corrosion grade WF2
Insulation class I
Height to height ratio 2.5
Introduced cable φ8mm-φ10mm
Overall size lamp body φ200×315mm
Explosion-proof ballast box 340×220×88mm
Weight lamp body 5.2kg
Explosion-proof ballast box 5.3kg
With light source Order number Light source Rated power Luminous flux Light source Average lifetime Temperature group BC9300-J70 Metal halide (MH) 70W5500lm10000hT6
BC9300-J100 Metal Halide Lamp (MH) 100W9000lm10000hT4
BC9300-J150 Metal Halide Lamp (MH) 150W13000lm10000hT4
BC9300-N70 HPS70W6000lm28500hT6
BC9300-N100 HPS 100W9600lm28500hT4
BC9300-N150 HPS150W16000lm28500hT4
Explosion-proof lighting installation Explosion-proof lamps should be checked from the nameplate and the product specification before installation: explosion-proof type, category, level, group; degree of protection of the shell; mounting method and fastener requirements for installation. The installation of explosion-proof lights must be securely secured, the fastening bolts must not be replaced, and the spring washers should be complete. The dust-proof and waterproof seals should be placed as they are. When the cable enters the line, the cable and the sealing gasket should be closely matched. The section of the cable should be round, and the surface of the jacket should not have defects such as asperities. Extra inlets shall be sealed in accordance with the type of explosion protection, and tighten the compression nut to seal the inlet.
Explosion-proof lights and lampshades should be able to automatically cut off the power before they are opened. However, due to the complexity of setting up the interlocking device, it is difficult to implement. Therefore, most lamps and lanterns only have warning signs such as “No live-on†on the obvious part of the housing. Because the surface temperature of the lamp after power off is still very high, such as immediately opening the lampshade, there is still the danger of igniting explosive gas mixture (mainly refers to the explosion-proof structure), so the incandescent lamp, high pressure mercury lamp, high pressure sodium lamp bulb surface temperature high light source , but also quickly open the lid of the luminaire to pay attention to this. When replacing bulbs (tubes), the flameproof joints of explosion-proof lamps shall be properly protected and shall not be damaged; the flameproof surfaces after cleaning shall be coated with phosphated plaster or 204-1 anti-rust oil; other paints shall be prohibited from painting; There shall be no rust layer on the surface. If there is slight rust, there shall be no numbness after cleaning. The seals used for dust protection and waterproofing must be kept intact. This is very important for the increased safety lighting. If the seal is seriously damaged, replace it with a seal of the same size and material and replace the entire light if necessary. When overhauling, pay attention to whether the lampshade is intact and replace it immediately if it is broken.