Talking about the Four Kinds of Explosion-Proof Electrical Apparatus

There is a class of electrical equipment used in locations where hazardous gases and vapors are present. Chemical production often encounters various kinds of gases and vapors that have the danger of explosion. In places where these media are present, appropriate explosion-proof electrical appliances are properly selected in accordance with relevant regulations, standards, and regulations, so as to prevent the explosion of surrounding explosive mixtures. It is an important measure to ensure safe production, prevent explosions and fires. Explosion-proof signs and technical data are usually necessary on explosion-proof appliances to avoid misuse.

Explosion-proof electrical classification:

1. Explosion-proof main electrical appliances

A master device is a switching device that is used to close or open a control circuit to issue a command or program control. Such explosion-proof electrical appliances mainly include control buttons and operating columns. Explosion-proof control button shell is generally made of polycarbonate, glass fiber reinforced unsaturated polyester resin or ABS plastic injection molding, and a small amount is cast aluminum die casting. The general structure is an increase-safety enclosure with flame-proof components. It can also achieve anti-corrosion function and the explosion-proof grade can reach Class IIC. The operating column is mainly composed of a main tank, a junction box and a pillar. Its main box and junction box are made into one body, and some are made into separate bodies, each with its own characteristics. Its material is basically made of cast aluminum alloy material. The interior consists of various instruments, switches, buttons, and signal lights. Can be combined according to different needs.

2, explosion-proof junction box

In use, electrical equipment must be connected to a power supply network via wires or cables to form a system to perform its functions. However, the explosion-proof electrical equipment or cables used in explosion-proof electrical equipment cannot be infinitely long, and there are many places in the connection process that require series connection and parallel connection for wire tapping. This will inevitably cause external filtration of the joint part, which will easily lead to accidents. Explosion-proof junction box products are products that are manufactured to solve such problems in order to further ensure safe production. Such products include junction boxes, junction boxes, thread boxes, hanging boxes, distribution boxes and other products, whose shell is mainly made of cast aluminum alloy. According to requirements, there are a lot of incoming and outgoing lead-in devices, and the box is equipped with terminals for connecting or tapping. Most of these products are made of explosion-proof or increased safety type, the size of the large or small, the difference is greater, explosion-proof grade up to IIC level.

3, explosion-proof alarm electrical appliances

In some production occasions, lights and sounds are often required to prompt people's actions. Such devices are even more important in environments with explosive and dangerous gases. Its main products are explosion-proof lights, explosion-proof electric pole, explosion-proof electric flute, explosion-proof Feng Ming and other products, the structure is usually explosion-proof type, made of cast aluminum alloy, explosion-proof grade up to IICT6 level. Its operating voltage can be divided into straight 36 ~ 220V, AC up to 380V. Explosion-proof junction boxes and explosion-proof housings are the main structural components.

4, explosion-proof other types

In complex production processes, many special requirements are encountered, and special explosion-proof electrical products must be manufactured. Because of the small output of explosion-proof electrical and explosion-proof electrical appliances of such products, they require special products and are non-standard products. Therefore, they are classified as explosion-proof and other types. Mainly include electrical instruments, temperature transmitters, pressure transmitters, speed transmitters, liquid level meters, quantitative control devices, ignition devices, cameras and other products. These products are basically manufactured in accordance with production needs. Although their performance requirements are different, most products are made of metal, and their types are flameproof or increased safety structures, and a few of them are intrinsically safe. Type products, its operating voltage and operating current are generally relatively low, explosion-proof grade IICT6 grade.