The most complete plant with explosion-proof electrical classification

There are many kinds of explosion-proof electrical appliances, which are used in most factories. They mainly include small explosion-proof products such as lighting switches, transfer switches (combination switches), travel switches, and pull-wire switches. Such products mainly include explosion-proof ceiling fans, explosion-proof exhaust fans and explosion-proof axial fans and other products. Its structure consists of explosion-proof motors, explosion-proof junction boxes and explosion-proof speed controllers and blades.

First, the explosion-proof control box category mainly includes a lighting distribution box for controlling the lighting system and a power box for controlling the power system. Most of these products are modular and can control up to 12 loops. Most of their shells are made of cast aluminum alloys. Some of them are welded by steel plates, and a few are insulated. The interior is mainly composed of circuit breakers, contactors, thermal relays, changeover switches, signal lamps, buttons, etc. The manufacturer can also choose the equipment according to the needs of the user. Explosion-proof grade up to IICT6 level. Incidentally, explosion-proof automatic switches, explosion-proof knife switches, and fuses are also often used as control power or lighting distribution systems in some control applications, but only as a single piece. Therefore, these products are also classified as such products.

Second, explosion-proof starter class Such products include manual starter, electromagnetic starter, reversible electromagnetic starter, auto-coupling decompression starter, Y-△ transformation step-down starter and feed switch and other products. Explosion-proof starter products as terminal control equipment, generally a starter controls a motor, belonging to a wide range of products. Its casing shell is usually made of cast aluminum alloy or steel plate. Its interior is generally composed of contactors (air or vacuum type), motor protection systems, signal lights, push buttons and autotransformers, and they all have local control, remote control and automatic control. In some products, circuit breakers are installed as master switches to make the products more perfect.

Third, explosion-proof control switch market demand for such products is relatively large, so the manufacturers are also more, mainly including lighting switches, transfer switches (combination switch), limit switches, pull switches and other small explosion-proof products. The explosion-proof grades of these products can be up to IICT6 level. The explosion-proof housing shell is usually a composite structure made of cast aluminum alloy die-casting, and a few manufacturers use other material shells. These products are characterized by their small size, single internal components, low technological content, simple structure, and easy production.

Fourth, explosion-proof main command Electric main commander is used to close or open the control circuit to issue a command or program control switch. Such explosion-proof electrical appliances mainly include control buttons and operating columns. Explosion-proof control button housing is generally made of polycarbonate, glass fiber reinforced unsaturated polyester resin or ABS plastic injection molding, and a small amount is cast aluminum molding. The general structure is an increased-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.

5. The explosion-proof junction box electrical equipment must be connected to the power supply network through wires or cables during use to form a system to complete its use. However, the connecting wire or cable cannot be infinitely long, and there are many places in the connection process that require wire tapping in series and in parallel. This will inevitably cause joints to be exposed and cause accidents. Explosion-proof junction box products are products that are manufactured to solve these problems in order to further ensure safe production. Such products include junction boxes, junction boxes, thread boxes, hanging boxes, distribution boxes and other products, and its shell is mainly made of cast aluminum alloy. According to requirements, there are a lot of incoming and outgoing lead-in devices, and the boxes are equipped with connecting 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.

Sixth, explosion-proof lamps and lanterns in any workplace and environment must adopt lighting measures, and sites containing various kinds of explosive gas are no exception. Because of its many places of use, all over the production corners, explosion proof lamp products are produced in large quantities. This type of product has many varieties and specifications, but it can be roughly divided into several types: lighting, signage, signal, portable, etc.; it can be divided into incandescent lamp, mercury lamp, nano lamp, halogen lamp, and xenon lamp from the type of light source. And fluorescent lamps; from the structure of more points, generally hanging, hanging, wall-mounted, ceiling, portable, cantilever and so on. From the perspective of installation, explosion-proof lighting can be realized from 30° to 90°. From power, it can be from tens of watts to several hundred watts. The installation height starts from the ground to several meters high. It can be said that explosion-proof lighting is the largest output of all explosion-proof electrical products and the most used products. Moreover, due to its specific function, it causes a large loss and a large amount of replacement. The structure of this type of product varies in shape and shape, but it varies from explosion-proof performance. It is basically a flameproof type, and the shell material is made of cast aluminum alloy, which can basically meet the user's needs in the following IIC level places. The need for lighting and display features.

VII. Explosion-proof connection The main function of the explosion-proof connector is to use for cable connection and cable branching. Its main products are explosion-proof plugs and explosion-proof power socket boxes. The rated voltage is 220V~380V, and the rated working current is up to 100A. The type has two poles, three poles plus the neutral line and the grounding wire structure. The product enclosure is made of metal and plastic materials, and the explosion-proof grade can reach IIC grade. The inside is mainly composed of connectors. Some products are equipped with a switch with a break point. This switch and the connector both have a chaining function, that is, the switch is disconnected after the switch is disconnected, and the plug is first inserted and closed. Products without a switch also have the function of disconnecting the grounding wire after disconnecting the main circuit and inserting the grounding wire before inserting the main circuit. This is all done to ensure safe operation. Most of these products are used for direct operation, so their insulation performance requirements are generally high and must not be ignored.

VIII. Explosion Proof Fans Such products mainly include explosion-proof ceiling fans, explosion-proof exhaust fans and explosion-proof axial fans and other products. Its structure consists of explosion-proof motors, explosion-proof junction boxes and explosion-proof speed controllers and blades. Its rated working voltage is generally up to 380V, explosion-proof grade up to IIBT4.

IX. Explosion-proof electric appliances with heat function The petrochemical enterprises often need some heating equipment and electric heating equipment in the production process. Therefore, the explosion protection of such products is also very important. The main products are explosion-proof heaters, explosion-proof heaters . Since the main functions of products such as explosion-proof control transformers and explosion-proof ballasts are not thermal energy, they will also generate heat during operation, and they should also receive great attention. Therefore, they are all included in such products. Of course, with the rapid development of science and technology, there will be many electrothermal devices made of high-tech materials, but the explosion protection problem cannot be ignored. The main components of explosion-proof heating equipment are composed of components such as windings, controllers and junction boxes, and often have protection functions for controlling or monitoring the temperature. This type of product is basically a flameproof type, explosion-proof grade IIBT4.

X. Explosion-proof alarms and electrical appliances In some production occasions, lights and sounds are often required to prompt people's actions. Such appliances are even more important in an environment containing explosive and dangerous gases. Its main products are explosion-proof lights, explosion-proof electric bell, 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.

Eleven, explosion-proof electromagnets Such products mainly include explosion-proof electromagnets, explosion-proof solenoid valves, explosion-proof electromagnetic actuators and other products. Its working principle is that under the action of the electromagnetic field, the electromagnetic force generated by the mechanical equipment to promote the work, generally for braking purposes. Most of the structures are explosion-proof, made of cast steel or cast iron, explosion-proof grade IIBT6. Its main technical parameters are generally thrust or suction (calculated in kg) and power continuity rate, must not be long-term power, otherwise it is easy to overheat and cause danger.

XII. Explosion-proof Other types often encounter many special requirements in a complex production process. To this end, special explosion-proof electrical products must be manufactured. Because of the low output of such products, they require special products and are non-standard products. Therefore, they are classified as explosion-proof. 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, their operating voltage and operating current are generally lower, explosion-proof grade IICT6 grade.

In the above, the explosion-proof electrical products used in factories are roughly divided into 12 categories, so as to obtain a clearer and rational understanding of these products. The above categories may be missing or incomplete. But basically it includes most of the products that are currently circulating on the market.
It should be pointed out that there are some products such as reducers, sealed joints, pipe joints, unions, flexible connecting pipes, etc. Many manufacturers have listed them as explosion-proof products. This is a misunderstanding. These products can only be called auxiliary pieces of explosion-proof electrical products. Therefore, the product category here does not include these products.

Explosion-proof cameras belong to explosion-proof monitoring products and are the cross product of explosion-proof industries and monitoring industries. Because they cannot use conventional camera products in high-risk flammable and explosive sites, they need products with explosion-proof functions and relevant certificates issued by national authorities. Can be called an explosion-proof camera.

Working Principle The working principle of the explosion-proof camera is to suppress the generation and occurrence of the four elements of the explosion so that electrical products can still work normally in high-risk environments. The four elements of the explosion are:
First, the site has flammable gas, dust and mixture and constitute a certain concentration;
Second, the site has a full combustion reaction with oxygen and combustibles;
Third, the site has enough temperature to cause the mixture to react in oxygen;
Fourth, the on-site space is small enough to allow the burned heat to accumulate a certain concentration or even burst in a short time.
Any of the above four factors can be effectively controlled to prevent explosion.

According to the application place, the classification is classified according to the application place. Explosion-proof cameras are mainly divided into two categories: mining explosion-proof camera and factory explosion-proof camera.
1. Class I—Coal mine, underground electrical equipment
2, 2, Class II - Factory Electrical Equipment

According to product function
1. Explosion-proof fixed camera This type of camera consists of an imaging unit, a power supply unit, and a communication unit, plus an external simple mechanical structure to achieve its fixation and steering, which is an explosion-proof camera with low cost, simple function, and easy installation;
2. Explosion-proof multifunctional camera This type of camera consists of an imaging unit, a power supply unit, a communication unit, an auxiliary lighting unit, a control unit, a steering unit, and other auxiliary units. It is a mainstream explosion-proof camera. There are also some non-IR light-filling products, such as: LED luminescence, halogen, helium, laser light and other means to achieve the light can be included in this type of explosion-proof camera;
3, split-type explosion-proof camera This type of camera features more or less, according to different combinations to achieve the function, you can use the explosion-proof head to achieve camera rotation, through the installation of supplementary light to achieve auxiliary lighting, through the installation of different communications equipment Implementation of communication requirements, control input and compatibility through the installation of decoding devices. The installation of such products is complex and requires high requirements for installation personnel, but maintenance and repairs are simple.
4, explosion-proof integrated camera This type of camera is a collection of functions in one, and the appearance of lightweight, easy construction and installation, but maintenance is more trouble.

Divided by transmission media
1, composite cable explosion-proof camera (usually coaxial video cable + power cable composite, zoom explosion-proof camera is a coaxial video cable + power + control cable composite), commonly known as analog signal explosion-proof camera.
2, explosion-proof network camera (refers to the network cable, the network to transmit the explosion-proof camera), is a digital signal explosion-proof camera.
3, explosion-proof fiber optic camera (refers to the explosion-proof camera transmitted through the optical fiber), is a digital signal explosion-proof camera.
4, explosion-proof wireless camera (refers to the explosion-proof camera to transmit images through wireless signals).

According to the resolution
1. Standard definition explosion-proof camera (explosion-proof camera with less than 540 horizontal scanning lines)
2, HD explosion-proof camera (explosion-proof camera with horizontal scanning line number higher than 540 lines)