What do you know about armored cables?
Armored cables are often used for underground direct burial, but many customers do not know much about the classification, use and function of armored cables. Next, the wire and cable manufacturers will introduce the classification, use and function of armored cables in detail!
Armored cables are made of conductors of different materials installed in metal sheaths with insulating materials, and are processed into a bendable solid combination. Armored cables include armored thermocouples, armored thermal resistors, etc., which are mainly used for temperature measurement in chemical, metallurgical and other fields. The mechanical protective layer of armored cables can be added to cables of any structure to increase the mechanical strength of the cables and improve their anti-corrosion ability. It is suitable for areas that are susceptible to mechanical damage and extremely susceptible to erosion, such as chemical, metallurgical, mechanical manufacturing, power generation and scientific experiments. Among them, the largest amount is armored thermocouples. Armored cables can be divided into different types such as steel belt armor and steel wire armor. Armored cables have many advantages. Its mechanical protective layer can enhance mechanical protection such as tensile strength and compressive strength and extend service life. Armored cables have a certain resistance to external forces, can also prevent rat bites, and will not cause power transmission problems through armoring. Moreover, the bending radius of the armor should be large, and the armor layer can be directly grounded to protect the cable.
Armored cables differ from non-armored cables in structure, scope of application and purpose. The armored cable has an additional metal reinforcement layer on the surface, which is suitable for use when buried underground. It is generally used when buried underground and laid. For example, armored cables are required when directly buried and laid. Non-armored cables do not have a reinforcement layer on the surface and cannot be buried underground. Non-armored cables are generally used in other situations.
Armored cables can be directly buried and laid without wearing pipes, which reduces the workload and is inexpensive. This is also one of the reasons why they are more commonly used in actual applications.
The armor of armored cable can be divided into steel belt armor (22, 23), fine steel wire armor (32, 33) and thick steel wire armor (42, 43). The meaning of armored cable model, in order to allow the cable to withstand radial pressure, a double steel belt and gap wrapping process is adopted, which is called steel belt armored cable; after the cable is formed, the steel belt is wrapped around the cable core, and then a plastic sheath is extruded. This type of cable model is represented by control cable KVV22, plastic cable VV22, communication cable SYV22, etc. The two Arabic numerals in the subscript of this type of cable model, the first one: "2" represents double steel belt armor; the second one: "2" represents polyvinyl chloride sheath, if a polyethylene sheath is used, "2" can be changed to "3". This type of cable is generally used in places with relatively large bearing pressure. For example: crossing roads, squares, and roadsides and railways with relatively large vibrations, it is suitable for underground, tunnel and pipe laying. In order to allow the cable to withstand greater axial tension, a process of wrapping multiple low-carbon steel wires is adopted, which is called steel wire armored cable. After the cable is formed, the steel wire is wrapped around the core wire at a required pitch and then the sheath is squeezed. The representation method in this cable model is such as control cable KVV32, plastic cable VV32, coaxial cable HOL33, etc. The two Arabic numerals in the model, the first: "3" represents fine steel wire armor; the second: "2" represents polyvinyl chloride sheath, and "3" represents polyethylene sheath. This type of cable is generally used in occasions with large spans and laying drops.
Where are armored cables generally used? The mechanical protective layer of armored cable can be added to cables of any structure to increase the mechanical strength of the cable and improve its anti-corrosion ability. It is a telephone cable designed for areas that are susceptible to mechanical damage and extremely susceptible to erosion. It can be laid in any way, and is more suitable for direct burial in rocky areas. Armored cables are generally fixed power cables. In layman's terms, they are fixed in one place and basically do not move. The power line transmits electrical energy. In addition to the above, the purpose of adding armor to cables is to enhance mechanical protection such as tensile strength and compressive strength to extend service life. The armor has a certain resistance to external forces and can also prevent rats from biting and penetrating the armor layer to cause power transmission problems. The bending radius of the armor should be large, and the armor layer can be grounded to protect the cable. The production of armored cables abroad is mainly concentrated in several relatively developed countries, such as the United States, the United Kingdom, Japan, Germany, and Russia; there are no manufacturers in some Southeast Asian regions, but as long as there are chemical, metallurgical, machinery manufacturing, power generation and other industries, there is temperature measurement, and armored cables are needed.
So what is the role of armored cable? Armored cable refers to a cable with a metal armored protective layer. The purpose of adding an armor layer to the cable is not only to enhance mechanical protection such as tensile strength and compressive strength to extend the service life, but also to improve the cable's anti-interference performance through shielding protection. Commonly used armor materials include steel strips, steel wires, aluminum strips, aluminum tubes, etc. Among them, steel strips and steel wire armor layers have high magnetic permeability and good magnetic shielding effect. They can be used to resist low-frequency interference and can enable armored cables to be directly buried without wearing pipes. They are inexpensive and have good quality, and are widely used in practice. The mechanical protective layer of armored cable can be added to cables of any structure to increase the mechanical strength of the cable and improve its anti-erosion ability. It is a special cable designed for areas susceptible to mechanical damage and erosion.
