Explosion proof dome light: paint spray booth safety lighting core technology and application practices

As a high-risk workplace, paint spray booths are often filled with paint volatiles [such as toluene, xylene, etc.], whose concentration reaches the explosion limit, and which can easily lead to combustion and explosion accidents when they meet electric sparks or high-temperature surfaces.

Explosion proof dome light with its integrated sealing structure, high level of Explosion proof certification and intelligent features, into a core lighting equipment to ensure the safe production of paint spray booths.

In this paper, we will analyze its fundamental role in the paint spray booth from the dimensions of technical characteristics, scene adaptation and selection strategy.

First, why must choose Explosion proof dome light for paint spray booth?

1. Intrinsically safe Explosion proof design

Paint spraying operations produce volatile organic compounds [VOCs] concentration is often in the explosion threshold, ordinary lamps and lanterns electrical components are prone to produce arc or high temperature.

Explosion proof dome light adopts Explosion proof [Ex d] structure, approved high-strength aluminum alloy shell and multi-layer sealing technology, physical isolation of the internal circuit and the external explosive environment, in line with the ATEX II 2G Ex db IIC T4 guidelines for Zone 1/2 hazardous areas, to eliminate the risk of explosion from the source.

2. Corrosion resistance and easy cleaning

Paint particles are easy to adhere to the surface of the lamps and lanterns, and traditional materials are easy to corrode and difficult to clean. Explosion proof dome light adopts nano-coated toughened glass translucent cover, light transmittance ≥ 90%, smooth surface and anti-fouling, only need to wipe with a damp cloth to remove the paint residue.

The shell is approved by WF2 anti-corrosion certification, resistant to pH 3-11 acid and alkali corrosion, prolonging the service life of the equipment.

3. Energy efficient and intelligent management

Compared with traditional metal halide lamps, Explosion proof dome light equipped with high luminous efficiency LED light source [luminous efficiency ≥ 140lm / W], energy consumption reduced by more than 60%, life expectancy of 100,000 hours.

With the help of DALI intelligent dimming system, the brightness can be dynamically adjusted according to operational requirements, reducing ineffective energy consumption and reducing the comprehensive operation and maintenance costs by 45%.

Second, Explosion proof dome light in the paint booth core application scenarios

1. spraying operation area

This area has the highest concentration of VOCs, the lamps need to meet Zone 1 Explosion proof requirements. Explosion proof dome light is equipped with anti-static coating and non-glare design, 120 ° wide-angle light distribution covering a diameter of 25 meters, to ensure that the uniformity of spraying detection precision, while avoiding the risk of static spark ignition.

2. Drying room and leveling area

The high temperature environment [40-60℃] poses a challenge to the heat dissipation of the lamps and lanterns. Adopting multi-channel eddy current cooling system Explosion proof dome light, the surface temperature is stabilized below T6 group [≤85℃], with ceramicized silicone sealing ring, to prevent thermal expansion and contraction leading to structural failure.

3. Material storage and paint mixing room

This area needs to be moisture-proof and dust-proof, the lamps are approved with IP68 protection level and vacuum potting process to ensure that the internal circuits are free from the risk of condensation in the environment of 98% humidity. Part of the model integrated gas concentration sensor, can be linked to the ventilation system automatically exhaust.

Third. Explosion proof dome light technology innovation and selection points

1. Structural improvement and intelligent integration

Three-cavity separation design: light source cavity, power supply cavity and wiring cavity are independently isolated to avoid heat superposition, and heat dissipation efficiency is increased by 40%.

Internet of things function: support LoRa wireless communication, real-time monitoring of lamps and lanterns temperature, power consumption and fault code, data access to the factory MES system, preventive maintenance.

2. Optical and Material Upgrade

Asymmetric light distribution technology: adopting high purity aluminum reflector and PC lens, spot uniformity reaches 85%, effective illumination is increased by 30%, and color difference of paint detection is reduced.

Material selection: 316L stainless steel shell is preferred for corrosive environments, and nano-ceramic coating is used in high temperature areas to withstand continuous baking at 150℃.

3. Selection of core indicators

Certification compliance: ATEX 2014/34/EU or IECEx approval is required, and the gas group covers IIC [hydrogen and other high-risk gases].

Environmental suitability: Zone 1 area select T4 group [≤ 135 ℃], protection class not less than IP66.

Energy efficiency guidelines: color rendering index Ra>80, to ensure accurate judgment of paint color.

FAQ: Explosion proof dome light common problems answer

Q1：How to plan the cleaning frequency of spray paint room lamps and lanterns?

A: It is advocated to clean the surface of the translucent cover every quarter, using neutral cleaners to wipe. Nano-coating material can reduce the adhesion of paint, reducing the maintenance frequency.

Q2: Does the high humidity environment lead to short circuit?

A: Explosion proof dome light approves vacuum potting process to seal the drive power supply, the protection level reaches IP68, and it can be operated stably for a long time in the environment with 98% humidity.

Q3: Does the intelligent dimming function affect the Explosion proof performance?

A: The dimming circuit is encapsulated in an independent Explosion proof cavity, and the signal transmission adopts intrinsically safe barrier technology, with the energy limited to less than 30mW, which is in line with Ex ia Explosion proof standard.