It mainly includes the lighting distribution box for controlling the lighting system and the power box for controlling the power system. Most of these products are combined in structure.
Explosion-proof electrical appliances (6 pieces) can control at most 12 circuits. Most of its shell is cast aluminum alloy, some are welded with steel plates, and a few are insulating materials. Its interior is mainly composed of circuit breaker, contactor and thermal relay. Components such as change-over switch, signal lamp, button, etc. can also be selected and equipped by the manufacturer according to the needs of users. The explosion-proof grade can reach CT6. By the way, explosion-proof automatic switch, explosion-proof breaker and fuse are often used to control the on-off of power or lighting distribution system in some control occasions, but they just become a single piece. Therefore, these products are also classified as such products.
2 explosion-proof starter class
Such products include manual starter, electromagnetic starter, reversible electromagnetic starter, autotransformer starter, Y-δ converter starter and feed switch. Explosion-proof starter products as terminal control equipment, generally, one starter controls one motor, belonging to a wide variety of products. Its shell is usually made of cast aluminum alloy or steel plate. Its interior is generally composed of contactor (air or vacuum), motor protection system, signal lamp, button and autotransformer OS, which generally has the functions of local control, remote control and automatic control. Some products are also equipped with circuit breakers as main switches, which makes the products more perfect.
3 explosion-proof control switches
The market demand for this kind of products is relatively large, so there are many manufacturers, mainly lighting switches and changeover switches (combined explosion-proof electrical appliances).
Switch), travel switch, cable switch and other small explosion-proof products. The explosion-proof grade of these products can reach CT6, and their explosion-proof casings are usually made of cast aluminum alloy and die-casting, while a few manufacturers use casings of other materials. This kind of products are characterized by small volume, single internal components, low technical content, simple structure and easy manufacture.
4 explosion-proof main electrical appliances
The main command device is a switching device for closing or disconnecting the control circuit to issue commands or program control. This kind of explosion-proof electrical appliance mainly includes control button and operation column. The shell of explosion-proof control button is generally made of polycarbonate, glass fiber reinforced unsaturated polyester resin or ABS plastic by injection molding, and a small amount is also made of cast aluminum by die casting. The general structure is an increased safety shell with explosion-proof components inside, which can achieve anti-corrosion function, and the explosion-proof level can reach ⅱ C. The operating column is mainly composed of main box, junction box and pillar. Some of the main box and junction box are integrated, some are separated, and each has its own characteristics. Its material is basically cast aluminum alloy. The interior consists of various instruments, switches, buttons and signal lights. Can be used in combination according to different needs.
5 explosion-proof junction boxes
Electrical equipment must be connected to the power supply network through wires or cables to form a system in order to complete its use function. But the connection is lead explosion-proof electrical appliances.
Or the cable can't be infinitely long, and there are many places that need to be connected in series and parallel, and wires need to be tapped. This will inevitably lead to external filtration of joint parts, which is easy to cause accidents. Explosion-proof junction box products are produced to solve such problems, in order to further ensure safe production. These products include junction boxes, junction boxes, threading boxes, hanging boxes, junction boxes and other products, and their shells are mainly made of cast aluminum alloy. There are many lead-in and lead-out devices as required, and the box is equipped with wiring terminals for connection or tapping. Most of these products are made into explosion-proof or safety-enhancing, with large or small volume and great difference, and the explosion-proof grade can reach ⅱ C.
6 explosion-proof lamps
Lighting measures must be taken in any workplace and environment, and places containing various explosive gases are no exception. Because it is used in many places and all over the production corner, explosion-proof lamps can be mass-produced. These products have many varieties and complete specifications, but they can be roughly divided into lighting, signs, signals, hand-held and other forms. According to the type of light source, it can be divided into incandescent lamp, self-ballasted mercury lamp, high-pressure sodium lamp, metal halide lamp, dysprosium lamp and fluorescent lamp, which are more diverse in structure, including hanging type, hanging type, wall-mounted type, ceiling-mounted type, hand-held type and cantilever type. From the installation point of view, the explosion-proof lamp can achieve 30 to 90. In terms of power, it can range from tens of watts to hundreds of watts. The installation height starts from the ground to several meters high. It can be said that explosion-proof lamp is the most productive and versatile product among all explosion-proof electrical products. Moreover, due to its specific function, it has caused a large number of losses and a large number of substitutions. The structure and appearance of these products vary greatly, but in terms of explosion-proof performance, they are basically flame-proof, and the shell material is mostly cast aluminum alloy, which can basically meet the needs of users for various lighting and display functions in places below Class II C.
7 explosion-proof connection grade
Explosion-proof connectors are mainly used for cable connection and cable branching. Its main products are explosion-proof plugs and explosion-proof power socket boxes. Er explosion-proof electrics
Constant voltage 220 V ~ 380 V, rated working current up to 100A. There are two-pole, three-pole plus neutral wire and grounding wire structures. The shell of the product is made of metal and plastic, and the explosion-proof grade can reach class II C. Its interior mainly consists of connectors, and some products are equipped with switches with breakpoints. Both the switch and the connector have interlocking function, that is, the switch is disconnected first, then inserted, and then closed. Products without switches also have the function of disconnecting the main circuit first, then disconnecting the grounding wire, and then inserting the grounding wire into the main circuit. This is to ensure safe operation. Most of these products are directly operated by hand, so the requirements for their insulation performance are generally high and must not be ignored.
8 explosion-proof fans
These products mainly include explosion-proof ceiling fans, explosion-proof exhaust fans and explosion-proof axial fans, and their structures are composed of explosion-proof motors, explosion-proof junction boxes, explosion-proof speed control controllers and blades. Its rated working voltage can generally reach 380V, and its explosion-proof grade can reach BT4.
9 Explosion-proof electrical apparatus with heating function
Petrochemical enterprises often need some heating equipment and electric heating equipment in the production process, so the explosion-proof problem of such products is also very heavy for explosion-proof appliances.
Want it. The main products are explosion-proof electric heaters and explosion-proof heaters. Because explosion-proof control transformers, explosion-proof ballasts and other products, although their main function is not to obtain heat energy, they will also generate heat during operation, which should also be highly valued, so they are all classified as such products. Of course, with the rapid development of science and technology, there will be many electric heating equipment made of high-tech materials, but its explosion-proof problem can not be ignored. The main components of explosion-proof heating equipment are windings, controllers and junction boxes, which often have the protection function of controlling or monitoring temperature. This kind of products are basically flameproof, and the explosion-proof grade is BT4.
10 explosion-proof alarm apparatus
In some production occasions, some lights and sounds are often needed to prompt people's actions. This kind of electrical appliance is more important in the environment containing explosion and dangerous gas. Its main products are explosion-proof indicator light, explosion-proof bell, explosion-proof electric flute, explosion-proof buzzer and other products. The structure is usually explosion-proof, made of cast aluminum alloy, and the explosion-proof grade can reach CT6. Its working voltage can be divided into DC 36 ~ 220 volts and AC 380 volts ... explosion-proof junction box and explosion-proof shell are its main structural components.
1 1 explosion-proof electromagnet
This kind of products mainly include explosion-proof electromagnet, explosion-proof solenoid valve, explosion-proof electromagnetic driver and other products. Its working principle is that under the action of electromagnetic field, the generated electromagnetic force drives mechanical equipment to work, which is generally used for braking. Most of the structures are flameproof, made of cast steel or cast iron, and the explosion-proof grade is BT6. Its main technical parameters are generally thrust or suction (calculated in kilograms) and power-on duration, so it must not be powered on for a long time, otherwise it will easily overheat and cause danger.
12 explosion-proof other classes
In the complicated production process, we often meet many special requirements and need to manufacture special explosion-proof electrical products. Due to such products, explosion-proof electrical appliances
It belongs to non-standard products with small output and special requirements, so it is classified as explosion-proof other categories. There are mainly electrical instruments, temperature transmitters, pressure transmitters, speed transmitters, liquid level gauges, quantitative controllers, ignition devices, cameras and other products. These products are basically made to meet the needs of production. Although their performance requirements are different, most of them are metal shells, and the types are explosion-proof or safety-increasing. A few products are intrinsically safe, with generally low working voltage and current, and the explosion-proof grade is CT6. Above, the explosion-proof electrical products used in factories are roughly divided into twelve categories, in order to have a clear and rational understanding of these products. There may be some omissions or incompleteness in the above classification. But it basically includes most of the products in circulation now. It should be pointed out that some products, such as reducing joint, sealed joint, pipe joint, movable joint and flexible connecting pipe, are also classified as explosion-proof products by many manufacturers, which is a misunderstanding. These products can only be called auxiliary components of explosion-proof electrical products. Therefore, the product classification here does not include these products.
13 civil explosion-proof products
According to the needs of real life, some explosion-proof products are also needed in civil use. These products are miscellaneous, so they are classified as civil explosion-proof products, mainly including explosion-proof tricycles and explosion-proof electric drills. This product needs high technology. It is also a new starting point and a new direction for the explosion-proof industry!