CN201051419Y - Low wriggly change steel core soft aluminum twisted cable - Google Patents

Abstract

The utility model relates to a low-creep steel-cored annealed aluminum strand wire, which belongs to the electric wiring technical field. The utility model is characterized in that a single conducive wire is an annealed aluminum wire with a circular section and a conductivity which equals to or is more than 63% IACS, and the annealed aluminum wire is basically made of aluminum. The surface of the annealed aluminum wire also can be coated with a layer of copper to form a copper binding annealed aluminum wire. A load-carrying portion is a steel wire which has a circular section and is formed by ultrahigh strength steel, and the steel wire is formed through twisting galvanized steel wires which are formed through cladding zinc coating on wires, and the strength of extension is greater than or equals to 1550 MPa. Single wires of an inductive portion are layered-twisted on the load-carrying portion in different ways. The inductive portion employs electric annealed aluminum wires or the annealed aluminum wires with a copper coating externally, thus the conductivity is greater than or equals to 63% IACS and can achieve 70% IACS if thickening the cladding layer. The annealed aluminum wire is twisted on the low-creep steel wire, thus the utility model saves energy. The utility model is characterized by low electric energy consumption, low creep rate, and light sag of directing wires, and the utility model is of great value when being applied to high-tension or ultrahigh tension transmission lines.

Description

Low creep steel core annealed aluminum stranded wire

technical field

The utility model belongs to the technical field of transmission lines, and the low-creep steel-core annealed aluminum stranded wire is an energy-saving conducting wire for transmission lines.

Background technique

Conductors for transmission lines are generally concentrically twisted round wires. The conductive part is aluminum or aluminum alloy. Aluminum is electrical aluminum. The alloy is high-strength aluminum alloy and heat-resistant aluminum alloy. The conductivity of high-strength aluminum alloy is 52.5% IACS and 53% IACS. The conductivity of heat-resistant aluminum alloy is 58% IACS and 60% IACS. As a bearing The force part is galvanized steel wire or aluminum-clad steel wire. The galvanized steel wire is divided into three types according to the strength: general, high-strength and extra-strong. Their conductivity is 9% IACS; the aluminum-clad steel wire used as the load-bearing part of the conductor There are two kinds, the conductivity is 20.3%IACS and 27%IACS respectively. In order to improve the transmission performance of transmission lines, aluminum conductors with a conductivity of 62.5% IACS have been developed. Invar, aluminum-clad invar, organic synthetic fibers or carbon fibers, and ceramic fibers are used as load-bearing parts. The purpose is to increase the operating temperature of the conductors. When the line can transmit more electric energy, the sag of the conductor is still within the allowable range. However, these newly developed load-bearing parts are expensive, which increases the investment in line construction.

Contents of the invention

The utility model provides a low-creep steel-core soft aluminum stranded wire with low energy consumption, small creep variable and small arc sag of the line.

The technical scheme that the utility model takes:

Low-creep steel core annealed aluminum stranded wire includes a conductive part composed of multiple conductive single wires and a load-bearing part composed of multiple load-bearing single wires. The scheme is: the conductive single wire has a conductivity greater than or equal to 63% IACS The circular section electrical annealed aluminum wire made of aluminum as the base material, its surface is covered with a layer of copper to form a copper-clad annealed aluminum wire; the load-bearing part is a wire with a circular section made of steel, and the surface of the wire is covered The tensile strength of a layer of galvanized zinc is greater than or equal to 1550Mpa galvanized steel wire twisted; the single wires of the conductive part are layered and twisted on the load-bearing part in different combinations. The single wire is an annealed aluminum wire or a copper-clad annealed aluminum wire, and the layering is an inner layer or an outer layer. One of its methods is that multi-layer annealed aluminum wires are evenly twisted on the load-bearing part. The second method is that multi-layer copper-clad annealed aluminum wires are uniformly twisted on the load-bearing part. The third method is that the inner layer is annealed aluminum wire, and the outer layer is copper-clad annealed aluminum wire, which are uniformly twisted on the load-bearing part. The fourth method is to arrange annealed aluminum wires and copper-clad annealed aluminum wires at intervals on the same layer, and multi-layers are uniformly twisted on the load-bearing part.

The positive effect after implementing the utility model is:

The conductive part is made of aluminum-based conductive material, which is electrical aluminum. It can also be coated with a layer of copper on the outside, and then heat-treated into a soft state. Its conductivity is greater than or equal to 63% IACS (International Tough Copper Standard The percentage conductivity), the elongation at 250mm gauge length is greater than or equal to 15%, this kind of wire is called soft aluminum, if the thickness of the copper coating on the outer surface of the aluminum is increased, this "soft aluminum" even has a conductivity Can reach 70% IACS. The annealed aluminum wire is tightly twisted on the low-creep steel wire to form an energy-saving wire. The load-bearing low-creep steel core is made of extra-high-strength or ultra-high-strength galvanized (or zinc containing rare earth) steel wires of high-carbon steel. Tension treatment reduces the creep of the fabricated wire. When the energy-saving wire is used in the erection of transmission lines, the loss of electric energy is small, and the amount of creep is also small, which reduces the amount of sag of the wire. When the electric energy is used, the increment of the wire sag is still within the allowable sag range of the steel-reinforced aluminum stranded wire of the same specification. It reduces the loss of long-distance transmission of electric energy, and it is of great significance to apply it to high-voltage or ultra-high-voltage transmission lines such as west-to-east power transmission.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the basic structure of the utility model, a conductive part (1) and a load-bearing part (2);

Fig. 2 is the schematic cross-sectional view of the structure of the multi-layer annealed aluminum wire (11) evenly twisted on the load-bearing part;

Fig. 3 is a structural sectional schematic diagram of multi-layer copper-clad annealed aluminum wire (12) evenly twisted on the load-bearing part;

Fig. 4 internal layer is annealed aluminum wire (11), and outer layer is copper-clad annealed aluminum wire (12), and is uniformly twisted and is made on the structural sectional schematic diagram on the load-bearing part;

Fig. 5 is a structural cross-sectional schematic diagram of annealed aluminum wires (11) and copper-clad annealed aluminum wires (12) arranged at intervals on the same layer, and multi-layers uniformly twisted on the load-bearing part.

Detailed ways

Now in conjunction with the accompanying drawings the utility model is further described

The low-creep steel-core soft aluminum stranded wire includes a conductive part 1 composed of multiple conductive single wires and a load-bearing part 2 composed of multiple load-bearing single wires. Its structure is: the conductive part 1 has a conductivity greater than or equal to Annealed aluminum wire 11 made of aluminum-based material of 63% IACS has a circular cross-section, and its surface is covered with a layer of copper to form a copper-clad annealed aluminum wire 12; the load-bearing part 2 is a circular cross-section Steel wire, the surface of the steel wire is covered with a layer of galvanized zinc to form a galvanized steel wire with a tensile strength greater than or equal to 1550Mpa, 21 strands, and special treatment such as pre-stretching to make it have low creep characteristics; The single wires of the conductive part are layered and twisted on the load-bearing part in different combinations. The single wire is an annealed aluminum wire 11 or a copper-clad annealed aluminum wire 12, and the layering is an inner layer or an outer layer. One of its ways is that the multilayer annealed aluminum wires 11 are uniformly twisted on the bearing part. The second method is that the multi-layer copper-clad annealed aluminum wire 12 is evenly twisted on the load-bearing part. The third way is that the inner layer is an annealed aluminum wire 11, and the outer layer is a copper-clad annealed aluminum wire 12, which is evenly twisted on the load-bearing part. The fourth method is to arrange the annealed aluminum wires 11 and the copper-clad annealed aluminum wires 12 on the same layer at intervals, and the multilayers are uniformly twisted on the load-bearing part.

Claims (5)

1. Low-creep steel core annealed aluminum stranded wire, including a conductive part (1) formed by twisting a plurality of conductive single wires and a load-bearing part (2) formed by twisting a plurality of load-bearing single wires, characterized by: the conductive part ( 1) The single wire is a circular section electrical annealed aluminum wire (11) made of aluminum-based material with a conductivity greater than or equal to 63% IACS, and its surface is covered with a layer of copper to form a copper-clad annealed aluminum wire ( 12); the load-bearing part (2) is a wire with a circular cross-section made of steel, and the surface of the wire is covered with a layer of zinc coating and the tensile strength is greater than or equal to 1550Mpa galvanized steel wire (21) twisted; the conductive part The single wires are layered and twisted on the load-bearing part in different combinations, the single wires are annealed aluminum wires (11) or copper-clad annealed aluminum wires (12), and the layers are divided into inner layers or outer layers. 2. The low-creep steel-core annealed aluminum stranded wire according to claim 1, characterized in that: the conductive parts are layered and twisted on the load-bearing part in different combinations, and are multilayer annealed aluminum wires (11 ) evenly twisted on the load-bearing part. 3. The low-creep steel-core annealed aluminum stranded wire according to claim 1, characterized in that: the conductive part is layered and twisted on the load-bearing part in different combinations, and is a multi-layer copper-clad annealed aluminum wire (12) Evenly twisted on the load-bearing part. 4. The low-creep steel-core annealed aluminum stranded wire according to claim 1, characterized in that: the conductive parts are layered and stranded on the load-bearing part in different combinations, and the inner layer is an annealed aluminum wire ( 11), the outer layer is a copper-clad annealed aluminum wire (12), which is evenly twisted on the load-bearing part. 5. The low-creep steel-core annealed aluminum stranded wire according to claim 1, characterized in that: the conductive parts are layered and stranded on the load-bearing part in different combinations, and the annealed aluminum wires are on the same layer (11) and copper-clad annealed aluminum wire (12) are arranged at intervals, and multi-layers are uniformly twisted on the load-bearing part.

Images