12 explosion-proof electrical classification analysis
Explosion-proof products market demand is relatively large, so the manufacturer is also more, including lighting switches, switches (combination switch), limit switches, pull switches and other small explosion-proof products.
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, explosion-proof control box
It mainly consists of 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 circuits. Most of their shells are made of cast aluminum alloy.
There is also a part of the steel plate welded, and there is a small part of the insulating material shell. 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
Such products include manual starters, electromagnetic starters, reversible electromagnetic starters, auto-coupling decompression starters, Y-â–³ transformations, step-down starters, and feed switches. Explosion-proof starter products, as terminal control equipment, are generally controlled by a starter and a motor.
It belongs to a wide range of products. Its casing shell is usually made of cast aluminum alloy or steel plate. The interior is generally composed of contactors (air or vacuum), motor protection systems, signal lights, push buttons, and autotransformers, and they all have local control.
Remote control and automatic control functions. In some products, circuit breakers are installed as master switches to make the products more perfect.
Third, explosion-proof control switch
The market demand for this type of product is relatively large, so the manufacturer is also more, mainly including the lighting switch, transfer switch (combination switch), limit switch, pull switch and other small explosion-proof products. The explosion-proof rating of these products is up to IICT6 level.
The explosion-proof housing shell is usually a composite structure made of cast aluminum alloy die-cast, 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 electrical class
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 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 type, flameproof type elements are installed, and anti-corrosion function can be realized.
Explosion-proof grade up to IIC grade. 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. Internal by a variety of meters, switches,
Buttons and lights and other components. Can be combined according to different needs. Mine bracket light, mine flood light, mine LED light, mine sound and light signal device, mine flood light, emergency light, metal halide light
Fifth, 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 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 such problems in order to further ensure safe production. Such products include junction boxes, junction boxes, string boxes, hanging boxes, and distribution boxes.
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 box is equipped with terminals for connecting or tapping. Most of these products are made of explosion-proof type or increased safety type, and the volume varies from large to small.
Explosion-proof grade up to IIC grade. Mine bracket light, mine flood light, mine LED light, mine sound and light signal device, mine flood light, emergency light, metal halide light
Six, explosion-proof lighting
Lighting measures must be taken in any workplace and environment, and places containing various explosive gases are no exception. Because of its many places of use, all over the production corners, explosion proof lighting 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. From the light source type, it can be divided into incandescent, mercury, nano, halogen, and xenon. And fluorescent lamps;
There are 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.
Basically, the flameproof type is the main type. The material of the outer shell is made of cast aluminum alloy. It can basically meet the needs of various lighting and display functions for users in the places below the IIC level. Mine bracket lamp, mining cast light, mining LED roadway light, mine sound and light signal device.
Seventh, explosion-proof connection
The main function of the explosion-proof connector is to use for cable connection and cable branching. Its main product is BCX53.html'target='_blank'>Explosion proof plug and explosion-proof power socket box. The rated voltage is 220V~380V, and the rated working current is up to 100A.
Variety has two poles, three pole plus neutral line and ground wire structure, product shell made of metal and plastic material, explosion-proof grade up to IIC grade. The inside is mainly composed of connectors, and some products are equipped with switches with breakpoints.
Both the switch and the connector have a chaining function, that is, the switch is disconnected after the switch is disconnected, and the plug is first plugged in and closed. The product without switch also has disconnected the ground after disconnecting the main circuit.
Line, the function of inserting the main circuit after inserting the grounding wire first. 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.
Eight, explosion-proof fan
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.
Nine, explosion-proof electrical appliances with heat function
Petrochemical enterprises often need some heating equipment and electric heating equipment in the production process, so the explosion protection of such products is also very important. The main products are explosion-proof heaters, explosion-proof heaters. Due to explosion-proof control transformers and explosion-proof ballasts, etc.
Although the main function of a product is not to obtain heat energy, it also generates heat during operation, and should also be given great attention. Therefore, all products are classified in such products. Of course, with the rapid development of technology, there will also be many electric heating equipment made of high-tech materials.
However, the problem of explosion protection 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.
Ten, 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 bells, explosion-proof electric flutes, explosion-proof phoenix and other products.
The structure is usually flameproof, made of cast aluminum alloy, explosion-proof grade up to IICT6 grade. 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.
Eleventh, 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
In complex production processes, many special requirements are encountered, and 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 with production needs, although their performance requirements are different.
However, most of the products are made of metal shells, flameproof or increased safety type, and very few products are intrinsically safe products, the operating voltage and operating current are generally low, explosion-proof grade IICT6 grade .
Mine bracket light, mine flood light, mine LED light, mine sound and light signal device, mine flood light, emergency light, metal halide light
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 still some products such as reducer joints, sealing joints, pipe joints, union joints, flexible joint pipes, etc. Many manufacturers have listed them as explosion-proof products. This is a misunderstanding. These products can only be called auxiliary parts of explosion-proof electrical products.
Therefore, the product category here does not include these products.
Compabloc Heat Exchanger
The Compabloc is a fully welded compact heat exchanger designed for the complete range of process and utility duties.
The Compabloc range of welded heat exchangers with a focus on perfor- mance, compactness, and serviceability.
The heart of the Compabloc is a stack of corrugated heat transfer plates in 316L stainless steel, or other material. The plates are laser welded and form a compact core. This core is then enclosed and supported by four corner girders, top and bottom heads and four side panels (see Sectional view of Compabloc). These components are bolted together and can be quickly taken apart for inspection, service and cleaning.
The design can be configured in single or multi-pass arrangements in either co-current or counter-current operation, for liquid-to-liquid or two-phase duties.
The two media in the Compabloc heat exchanger flow in alternately welded channels between the corrugated plates.
Compabloc's flexible pass arrangements make it suitable for liquid-to-liquid duties with dissimilar flow rates, or two phase condensation or reboiler applications.