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The power cord inside the basic process of copper wire
2011-04-28 18:56:17
 

The power cord inside the basic process of copper wire

1. System of single strands of copper
Copper rod wire and cable commonly used materials, at room temperature, using a drawing machine or the number of road stretching through the die hole, so that cross-section decreased, length increased, the intensity increased. Drawing is the first of the wire and power cable company procedure, drawing of the main process parameters with mode technology.
2. Annealed copper single wire
Copper filament heated to a certain temperature, the re-crystallization method to improve the toughness of a single wire, reducing the strength of a single wire, wire and cable to meet the requirements of the conductive wire core. The key is to eliminate the annealing process the oxidation of copper.
3. Conductor stranding
To improve the flexibility of wire and cable in order to facilitate the laying of installation, conductive core taken from multiple single-stranded wire. Stranded wire core from the conductive form, the rules can be divided into strands and irregular strands. Irregular Stranded Stranded is divided into concentric stranded complex, a special stranded and so on.
To reduce the area occupied by the wire, reducing the cable geometry, the use of stranded conductors, at the same time pressed in the form, so that ordinary round mutate into semi-circular, fan-shaped, tile-shaped, and pressed the round. Such conductors are used in the power cord.
4. Insulation extrusion
Plastic wire and cable type used mainly extruded solid insulation, plastic insulated out the main technical requirements:
4.1. Eccentricity: the thickness of the insulation out of the deviation is embodied an important indicator of the level of the extrusion process, most of the product structure, size and standard deviation values ​​are clearly defined.
4.2. Smoothness: out of the surface of the insulation required to be smooth, with no surface roughness, burning, poor quality of impurities
4.3. Density: Extrusion cross section of insulation to dense and firm, not allowed to have visible pinhole to eliminate the presence of air bubbles.
5. Cabling
For multi-core cable in order to ensure shape, smaller cable shape, generally need to be twisted a circle. Stranded conductor stranding mechanism similar to the larger diameter section of the stranding, they use a method without back twist. Technical requirements for cabling: First, put an end to stand shaped insulated cores twisted result of bending the cable; second is to prevent insulation from being scratched.
Most of the cable into the cable at the same time with the completion of two processes: one is filled, to ensure that after the cable into the cable round and stability; one is binding, and to ensure that the cable core is not loose.
6. The sheath
To protect the insulated core of the wart is not armored injury, the need for appropriate protection insulating layer, the sheath points: squeeze bag protection layer (isolation units) and the sheath around the bag (cushion). Wrapped with a cushion with a cable instead of banding procedures simultaneously.
7. Armoring
Laying underground cables, work may bear a certain positive pressure, you can choose the structure of steel armor. Cable laying there on the existing positive pressure Tension occasions (such as water, the vertical shaft or larger gap in the soil), should be used with the structure of the type of armored steel.
8. Outer sheath
Outer sheath to protect the wire and cable insulation to prevent the erosion of the structure of part of the environmental factors. Outer sheath of the main role is to enhance the mechanical strength of wire and cable, anti-chemical corrosion, moisture, water immersion, to prevent burning, and other capabilities. According to the different requirements of the cable directly extruded by extrusion machine plastic sheath.
This set provided by the Ningboqiaopu Electric Co. power line wire basic process, with practical and authoritative


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