Explosion proof principle of explosion-proof electrical equipment
2021-04-25
Explosion-proof electrical equipment is an electrical equipment designed and manufactured on a national scale that will not cause explosions of nearby explosive mixtures. In coal, petroleum, chemical and other industries, the production environment and explosives are different, and the explosion protection measures adopted are also different. In order to standardize the design and manufacture of explosion-proof electrical equipment and to facilitate maintenance, use, and maintenance, China has established a complete national standard for explosion-proof electrical equipment. The current national standard for explosion-proof electrical equipment is GB3836, which basically corresponds to the IEC79 standard.
According to the explosion-proof measures adopted, GB3836 divides the explosion-proof electrical equipment into explosion-proof, increased safety, intrinsically safe, positive pressure, oil-filled, sand-filled, spark-free, encapsulated, gas-tight, and special types. type.
a. Flameproof electrical equipment
An electrical device with a flameproof enclosure is called a flameproof electrical device. Flameproof enclosures can withstand both the explosion pressure of the internal explosive gas mixture and the propagation of the internal explosion to the explosive mixture near the enclosure. The scale of this type of equipment is GB3836.2-83 "Explosion-proof electrical equipment for explosive atmospheres - Flameproof electrical equipment".
b. Increased safety electrical equipment
Electrical equipment that does not generate arcs, sparks, or high temperature that may ignite explosive mixtures under normal operating conditions will take measures to improve the safety of the structure to avoid arcing, sparks, or potential under normal or defined overload conditions. High temperature electrical equipment that ignites explosive mixtures is known as increased safety electrical equipment. The scale of the equipment is GB3836.3-83 "Explosion-proof electrical equipment for explosive atmospheres - Increased safety electrical equipment".
c. Intrinsically safe electrical equipment
All electrical devices that are intrinsically safe circuits are called intrinsically safe electrical devices. The so-called intrinsic safety circuit refers to the circuit under which, under the premise of delineation, neither the electric spark nor the thermal effect produced under normal operation or defined fault conditions can ignite the explosive mixture. The scale of this type of equipment is GB3836.4-83 "Explosion-proof electrical equipment for explosive atmospheres - intrinsically safe circuits and electrical equipment"
d. Positive pressure type electrical equipment
Electrical devices with positive pressure enclosures are called positive pressure electrical devices. The so-called positive pressure shell is directed to the protective gas inside the shell, keeping the pressure of the inner protective gas higher than the pressure of the nearby explosive atmosphere to prevent the outer explosive mixture from entering the shell inside the shell. The scale of this type of equipment is GB3836.5-87 "Explosion-proof electrical equipment for explosive atmospheres - positive pressure electrical equipment".
e. Oil-filled electrical equipment
The electrical equipment that immerses all components or sector components that may produce spark or overheating in the oil so that it cannot ignite the explosive mixture above or outside the oil surface is called an oil-filled electrical device. The scale of this type of equipment is GB3836.8-87 "Explosion-proof Electrical Equipment for Explosive Environments - Oil-filled Electrical Equipment".
f. Sand-filled electrical equipment
The sandstone material is filled inside the shell so that under the premise of the delineation, the electric arc generated in the shell, the spread flame, the overheat temperature of the shell wall or the surface of the sand grain material cannot ignite the explosive mixture near the equipment, and the electric equipment is called the sand-filling type. Electrical Equipment. The scale of this type of equipment is GB3836.7-87 "Explosion-proof electrical equipment for explosive atmospheres - sand-filled electrical equipment".
g. Non-spark type electrical equipment
Under the premise of normal operation, the nearby explosive mixture will not be ignited, and the electrical equipment with the ignition failure will not generally be called a non-spark type electrical device.
Non-sparking type electrical equipment shall be designed and manufactured to take measures to ensure that the equipment will not generate ignition arc, sparks or dangerous temperatures during normal operation, and that no electrical or mechanical breakdown with ignition will occur under normal circumstances. . The scale of this type of electrical equipment is GB3836.8-87 "Explosion-proof electrical equipment for explosive atmospheres - Non-spark type electrical equipment".
h. Encapsulation type electrical equipment
The entire equipment or its components, ie electrical equipment that may generate arcs, sparks or high-temperature sectors that ignite the explosive mixture, are encapsulated in the encapsulant and cannot ignite nearby explosive mixtures under normal operation and an approved overload or approved fault. The standard of this type of electrical equipment is GB3836.9-90 "Explosion Proof Electrical Equipment for Explosive Atmospheres - Encapsulated Electrical Equipment".
i. Hermetic electrical equipment
Electrical equipment with a hermetic enclosure. The enclosure is sealed by melting, squeezing or gluing to prevent the gas outside the enclosure from entering the enclosure, separating it from the ignition source. The scale of this type of equipment is GB3836.10-90 "Explosion-proof electrical equipment for explosive atmospheres - gas-tight electrical equipment".
j. Special electrical equipment
Where the structure does not belong to the above-mentioned basic explosion-proof type, or a combination of the above-mentioned basic explosion-proof type, and other special measures have been fully tested and it has been confirmed that the electrical equipment having the ability to prevent ignition of explosive gas mixtures is called a special type of electrical equipment. This type of equipment must be inspected and qualified by the inspection and repair unit designated by the competent authority of the country, and it should also be reported to the National Bureau of Measurement.
k. Dust explosion-proof electrical equipment
Designed and manufactured in accordance with the premise of the design, so that the enclosure can prevent the entry of combustible dust or the amount of entry will not prevent the safe operation of the equipment, the internal accumulation of dust is also not easy to produce the danger of ignition, so as to ensure that the use of electrical equipment will not cause the explosion of nearby explosive devices. The scale of this type of equipment is GB1276.1-90 "Explosion-proof electrical equipment for explosive dust environment - dust explosion-proof electrical equipment."
Yueqing Win Explosion-proof Electrical Technology Co., Ltd. is located in Yueqing City, China's explosion-proof electric appliance production base. It is an explosion-proof electrical company integrating development, production, sales and service.
The company has a variety of domestic advanced production, testing equipment, a sound management system, the product has won the national explosion-proof product quality inspection center explosion-proof certification and the national industrial product production license, and the Chinese People's Insurance Company bear product quality liability insurance, Product performance is safe and reliable, well received by the majority of engineering companies, petroleum, chemical, coal, electricity, pharmaceuticals, aviation, military and other enterprises.
Yueqing Win Explosion-proof Electrical Technology Co., Ltd. is a science and technology enterprise integrating R&D, manufacturing, trading, and service functions. The main productions are: explosion-proof for factories, explosion-proof for ships, mobile lighting, etc. More than 200 series, more than 1800 varieties of products. Products are complete, the main products are: explosion-proof lighting distribution boxes, explosion-proof distribution boxes, explosion-proof power distribution boxes, explosion-proof power maintenance boxes, explosion-proof power distribution cabinets, explosion-proof maintenance power socket box, explosion-proof operation column, explosion-proof junction box, explosion-proof Junction box, explosion-proof magnetic starter, explosion-proof circuit breaker, explosion-proof control box, explosion-proof cable tray, explosion-proof lamp, explosion-proof floodlight, explosion-proof floodlight, infield light explosion-proof lamp, waterproof, dustproof, corrosion-proof lamp, explosion-proof ceiling lamp, Explosion-proof fluorescent lamps, explosion-proof anti-corrosion plastic fluorescent lamps, explosion-proof road lights, explosion-proof platform lights, anti-glare floodlights, explosion-proof flashlights, portable explosion-proof searchlights, explosion-proof headlamps, explosion-proof joints, explosion-proof pipe fittings, explosion-proof flexible connecting pipe, explosion-proof Travel switch, explosion-proof switch, explosion-proof lighting switch, explosion-proof control button, explosion-proof plug, explosion-proof electric bell, explosion-proof sound and light alarm, explosion-proof axial fan, explosion-proof air-conditioning, explosion-proof shaking head fan, explosion-proof exhaust fan, explosion-proof anticorrosion and various non-standard Explosion-proof box.
Companies adhere to market-oriented, forge ahead, pioneering and innovative, and constantly cultivate the core competitiveness based on technological innovation, the rapid rise in the fierce market competition, becoming one of the leading enterprises in the explosion-proof industry in China.
The company always adheres to the tenet of “customer first, quality first” and establishes a complete marketing service system that integrates pre-sales, sales, and after-sales services, providing customers with safe, stable, high-quality products and solutions in a timely manner. service.
Contact person: Ren Feiyan Contact phone number Company website: http://
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