Armored cables consist of conductors of various materials enclosed in an insulating metal sheath, formed into a flexible, solid structure. Armored cables are generally fixed power cables, typically fixed in place and essentially immobile, transmitting electrical energy. They are primarily used for temperature measurement, signal transmission, and special heating applications in chemical, metallurgical, mechanical, power generation, and scientific testing. Let's take a look at the various types of armored cables and their uses.
What types of armored cables are there?
1. Armor is categorized into steel tape armor (22, 23), fine steel wire armor (32, 33), and coarse steel wire armor (42, 43).
Steel-belt armored cables include VV22, VVP22, ZRVV22, and NH-VV2.
Steel-belt armored control cables include KVV22, KVVP2, KVVP22, and ZR-KVV22.
Steel-wire armored power cables include VV32, YJV32, and ZR-VV32.
Steel-wire armored control cables include KVV32 and KVVP32.
Armored communication cables include HYA53, HYAT53, HYA23, HYV22, and HYA22 (rodent-proof, buried).
2. To ensure the cable can withstand radial pressure, a double steel-belt, intermittent wrapping process is used, resulting in a steel-belt armored cable. After cable assembly, the steel-belt is wrapped around the cable core, and then a plastic sheath is extruded.
This type of cable is indicated by models such as KVV22 for control cables, VV22 for plastic power cables, and SYV22 for communication cables. The two Arabic numerals in the model subscript for this type of cable: the first "2" indicates double steel tape armor; the second "2" indicates a PVC sheath. If a polyethylene sheath is used, the "2" can be changed to a "3."
3. This type of cable is generally used in applications with relatively high load bearing pressures. For example, crossing highways, squares, and along roadsides or railway lines with high vibration. It is suitable for underground installation, tunnels, and pipe installation.
To enable the cable to withstand high axial tension, it is wrapped with multiple low-carbon steel wires, resulting in a steel wire armored cable. After cable formation, the steel wires are wrapped around the core at the required pitch, and then the sheath is extruded. This type of cable is indicated in model numbers such as control cable KVV32, plastic power cable VV32, and coaxial cable HOL33.
4. The two Arabic numerals in the model subscript: the first "3" indicates fine steel wire armor; the second "2" indicates a PVC sheath, and the second "3" indicates a polyethylene sheath. This type of cable is generally used in locations with large spans and installation heights.
What is the function of armored cable?
1. Armored cable, a mechanical protective layer, can be added to any cable structure to increase the cable's mechanical strength and improve its corrosion resistance. It is designed for telephone cables in areas susceptible to mechanical damage and erosion. It can be laid in any manner and is particularly suitable for direct burial in rocky areas.
2. Armored cable is generally used for fixed-layout power cables. In layman's terms, it is fixed in place and rarely moves, transmitting electrical energy.
3. In addition to the above, armoring cables also provides mechanical protection, such as tensile and compressive strength, to extend their service life.
3. The armor provides a certain degree of resistance to external forces and can also protect against rats, preventing damage from penetrating the armor and causing power transmission problems. The armor should have a large bend radius and be grounded to protect the cable.
4. Foreign armored cable production is primarily concentrated in a few relatively developed countries, such as the United States, the United Kingdom, Japan, Germany, and Russia. Southeast Asia lacks manufacturers. However, wherever there are industries like chemical engineering, metallurgy, machinery manufacturing, and power generation, temperature measurement is essential, and armored cables are needed.
From the above introduction to armored cable, we can see that armored cable refers to cables with a metallic armored protective layer. The purpose of the armored layer is not only to enhance mechanical protection such as tensile and compressive strength and extend service life, but also to improve the cable's anti-interference performance through shielding. The armored layer can also be grounded to protect the cable.
