Views: 7 Author: Site Editor Publish Time: 2022-03-23 Origin: Site
What are the functions of explosion-proof junction box?
Today, the editor of Linkwell will take you to understand it.
In industry or home, the junction box is a common accessory for electricians. Generally, the junction box is composed of a box cover, a box body, a terminal block, a diode, a connecting wire and a connector. At the joint of the wire, For example, if the line is relatively long, or where the wire tube needs to turn, the junction box is used as a transition. The wire tube is connected with the junction box, and the wires in the wire tube are connected in the junction box, which acts as a protective wire. And the role of connecting wires, this is the junction box.
Among the types of junction boxes, there is also an explosion-proof junction box, which is characterized by a cast aluminum alloy shell, and the surface is sprayed with pure epoxy resin powder. It is suitable for environments that are prone to explosive gas environments and flammable dust. isolated from it. Prevent sparks from being generated at the connection and achieve the purpose of explosion-proof. Some may have to withstand high pressure, and it is necessary to make the equipment waterproof and other measures. The principle of the junction box is to isolate the inside from the outside of the electrical equipment that may cause sparks. According to its wiring method, it can be divided into two types: steel pipe wiring and cable wiring. Pipe joints are provided for steel pipe wiring to facilitate the connection of steel pipes and junction boxes; compression nuts are used for cable wiring. The explosion-proof wiring basin is equipped with a wiring seat pressed by melamine slate arc-resistant plastic. The explosion-proof and anti-corrosion series is made of glass fiber reinforced unsaturated polyester resin molded shell. Or stainless steel welding and forming; the most used is of course the petrochemical industry. It is widely used in petrochemical enterprises and coal mines where biogas is not easy to accumulate. There are many ways and specifications for the inlet and outlet; in view of these problems, it is essential to choose a good, increased safety explosion-proof junction box with high safety and high protection ability.
The explosion-proof grades of the explosion-proof junction box are: ExdIIBT4, ExdIICT6, one is explosion-proof, the other is dust IIC, IIA, IIB, IIC, AF models. Comply with GB3836-2000, IEC60079, GB12476.1-2000, IEC61241 standard requirements. When opening the cover, just loosen the bolts by 1/3, and then turn the cover clockwise 10° to open it, which can achieve the effect of fast opening of the cover without losing the bolts.
Junction boxes have rubber gaskets, blanking plates, metal washers and compression nuts (or pipe joints). When the wire is introduced, the nut must be tightened or the pipe joint must be tightened to achieve the requirements of sealing isolation.
If the application is in a general environment, not an environment that is flammable and easy to catch fire, it is not necessary to use an explosion-proof junction box, and an ordinary high-quality junction box can fully meet the needs.
Shanghai Linkwell is a professional manufacturer of various junction boxes. Since its establishment, the company has always been committed to a one-stop solution for electrical control cabinet accessories. The products are all in line with CE, CCC, UL, TUV, Rohs and other certifications The products are exported to more than 80 countries and regions in the world and have a good reputation. Sales hotline: 400-671-6715
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