The so-called copper stranded wire refers to a new type of composite wire, which is made of high-quality low-carbon steel as the core and processed by copper plating, and several single wires are twisted according to certain rules. Copper stranded wire is a kind of flexible connecting wire for power transmission and distribution, electrical devices (such as transformers, electric furnaces), electronic and electrical equipment, and thyristor components. In addition, copper stranded wire can also be used for electrician operation grounding wire. The copper stranded wire is realized by rotating the stranded single wire around the stranded wire axis at an equal angular speed and moving the stranded wire forward at a uniform speed. Copper stranded wire can be divided into hard copper stranded wire and soft copper stranded wire. They have their own characteristics and uses.
What are the advantages of copper stranded wire technology?
1. Copper plays a role in conducting weak current signals, while steel wire plays a supporting role. According to the different methods of copper coating to steel wire, it is mainly divided into electroplating, coating, hot casting/immersion and electroforming. This product not only has the strength and toughness of steel, but also has the good conductivity and corrosion resistance of copper. Compared with copper single wire, it has the advantages of low density, high strength and low cost, and is an updated product of traditional pure copper single wire.
2. The use of copper stranded wire can reduce the operating temperature, and the stranded wire has higher mechanical flexibility than the single stranded wire with the same cross-sectional area. It is widely used in lines with high "Q" value.
3. The copper stranded wire is made of high-quality copper wire or tinned soft copper wire. After toughening treatment during processing, the finished product is soft, neat and beautiful.
4. Advantages of hard copper stranded wire and soft copper stranded wire:
(1) Hard copper stranded wire: strong tensile resistance, strong resistance, good conductivity
(2) Soft copper stranded wire: usually thinner than hard copper stranded wire, with high conductivity and toughness.
5. Advantages of insulated copper stranded wire: high tensile resistance.
What are the advantages of copper stranded wire technology?
1. Unique manufacturing process: cold rolling and hot drawing production process is adopted to realize the high combination of copper and steel.
2. Excellent corrosion resistance: the surface copper layer is thick (average thickness is more than 0.3mm), with strong corrosion resistance and service life of more than 30 years.
3. Better conductivity: Because the surface copper material has excellent conductivity, its own resistance is far lower than that of conventional materials.
4. Wide range of use: this product is applicable to soil conditions with different humidity, temperature and PH value.
5. Safe and fast use: the fittings are complete, the special connecting pipe or the hot-melt flux produced by our company is used for connection, the joint is firm, the installation is convenient, and the construction efficiency is greatly improved.
6. Construction cost reduction: compared with the traditional use of pure copper materials for grounding, the cost is greatly reduced.
What are the application fields of copper stranded wire?
1. Military coated wire conductor; Power industry grounding rod; Braided shield wire of power cable; Connectors for various electronic components; Reinforced conductor core of special cable; Overhead lines for power transmission and telephone lines; Conductor of parallel dual-core telephone subscriber communication line; Electrified railway and rail transit line messenger wire and sliding contact wire; Inner conductor material of coaxial cable of cable TV subscriber line and incoming line; Internal conductor of computer LAN, access network cable and field cable.
2. Application fields of hard copper stranded wire and soft copper stranded s wire:
(1) Hard copper stranded wire: hard copper stranded wire is often used in places that need to conduct electricity and have high requirements on tension, such as distribution lines and building conductors, as well as cables for lightning transmission, because of its strong resistance to tension and good resistance to conduct electricity..
(2) Flexible copper stranded wire: The most common wire we see is household electrical wire. It is also suitable for electrical machinery, as a conductor of power cables and communication equipment. The specifications of flexible copper stranded wire are 15-7 Φ 5、12-7 Φ 5、9-7 Φ 5, 15-7 Φ For example, 5 represents steel wire with nominal diameter of 5.0mm, 7 Φ 5 means that 7 such steel wires form a steel strand, while 15 means that 15 such steel strands form a bundle of steel bars, which means "a bundle of steel bars composed of 15 7-wire (with a total diameter of 5 mm and a diameter of about 1.7 mm) steel strands".
3. Application field of insulated copper stranded wire: there is a ring of insulating rubber or plastic outside the copper stranded wire. This kind of copper stranded wire is mainly made by taking advantage of the high tensile resistance of the copper stranded wire, which can be used for special locks, brake lines on bicycles, battery cars and motorcycles. It can also be used as a rope for drying clothes, etc.
The correct identification method of copper stranded wire?
First of all, look at the appearance of the copper strand. The selection and purchase of copper stranded wire should be observed from the appearance. Generally, the appearance of good copper stranded wire is relatively bright, with obvious damage and scratches, and no obvious discoloration caused by oxidation reaction. The outer color is relatively uniform, with black spots and cracks, and the distance is uniform and regular. Conforming to the above standards is a good choice of copper stranded wire.
Second: see the specifications and models of copper stranded wire. The selection of copper stranded wire needs to observe the size and specification of the wire. Generally, the drawing of copper stranded wire should be within the specified range, and should not exceed the process standard, otherwise it will be regarded as invalid stranded wire. The single wire forming the stranded wire must meet the uniform and tidy characteristics and comply with the process rules.
Again: look at the structure of copper stranded wire. For the selection and purchase of copper stranded wire, we should also observe the distribution and composition of the stranded wire to see if there are short wires, missing wires, loose strands, and overlapping strands. Generally, these can be observed with the naked eye. We need to carefully observe and inspect the quality of the copper stranded wire. We cannot choose unqualified products to produce wires and cables, which will cause serious safety accidents.
Finally: see the welding process of copper stranded wire. For the selection and purchase of copper stranded wire, attention should also be paid to whether the welding process is firm, whether the welding interface part is neat, and whether there is line irregularity in service. The welding interface shall be maintained in order, leveled, rounded and not tied. The diameter of the welding head shall not exceed 0.2mm in general; The welding of two adjacent copper strands should be kept at a certain distance and evenly spaced.
