CN204303379U - High-strength rigid aluminium profiles twisted wire - Google Patents

Abstract

The utility model discloses a high-strength duralumin twisted wire, which comprises a stress unit located in the center and a first aluminum alloy conductive layer and a second aluminum alloy conductive layer twisted on the outer surface of the stress unit in turn; The outer surface of the second aluminum alloy conductive layer is successively stranded with a first trapezoidal aluminum conductor layer and a second trapezoidal aluminum conductor layer. The first trapezoidal aluminum conductor layer is formed by twisting 19 to 21 first trapezoidal aluminum conductors. The second trapezoidal aluminum conductor layer is formed by twisting 23 to 25 second trapezoidal aluminum conductors; the stress unit includes a first carbon fiber single wire in the center and 6 second carbon fiber single wires twisted on the outer surface of the first carbon fiber single wire, The outer surfaces of the first carbon fiber single wire and the second carbon fiber single wire are covered with an aluminum layer. The utility model has a compact structure, the bending radius is reduced to 6 times the cable diameter, the space for the installation layout is reduced, the installation cost is reduced, and it is easier to lay. To prevent rainwater etc. from entering the inside of the wire.

Description

High strength duralumin type stranded wire

technical field

The utility model relates to a duralumin twisted wire, in particular to a high-strength duralumin twisted wire.

Background technique

my country's national economy continues to grow at a high speed, and the demand for electricity is increasing. According to the plan of State Grid Construction Co., Ltd., the construction of 1100kV UHV transmission lines will be focused on in recent years. In the construction of transmission lines, larger cross-section conductors are required, but the outer diameter of the conductors is not expected to be too large. Conductor design should consider many factors, especially the transmission capacity and economic current density of the conductor, corona critical voltage, mechanical strength and so on. On the one hand, in areas with narrow lines, it is only necessary to replace wires with similar cross-sectional specifications, and basically do not need to replace iron towers to meet the requirements for strength and wires to the ground. Increase. However, the original tower cannot have a large margin to meet the increase of its sag, so it is difficult to increase the capacity of the original corridor by 40~50% without changing the tower.

On the other hand, the existing aluminum conductors use galvanized steel strands as the force-bearing unit. This structure has been used for more than one hundred years and is a traditional structure. However, the strength of galvanized steel strand is not high, and the corrosion resistance is not strong, which shortens the overall service life of the wire. In the 1980s, aluminum-clad steel single wire appeared. At that time, due to the complicated process, it was difficult to promote. Now, it has been used in large-span lines. Its corrosion resistance is greatly enhanced, but its strength is lower than that of steel strands.

Contents of the invention

The utility model provides a high-strength duralumin-type stranded wire. The high-strength duralumin-type stranded wire has a compact structure, and the bending radius is reduced to 6 times the diameter of the cable, which reduces the space for installation layout, reduces the installation cost, and is more efficient. It is easy to lay, and the high compression coefficient increases the carrying capacity under the same cross-section, and can effectively prevent rainwater from entering the inside of the wire.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a high-strength duralumin stranded wire, including a stress unit located in the center and a first aluminum alloy conductive layer twisted on the outer surface of the stress unit in turn, a second Two aluminum alloy conductive layers;

The first aluminum alloy conductive layer is formed by twisting 10-14 first aluminum single wires, and the second aluminum alloy conductive layer is formed by twisting 16-20 second aluminum single wires;

The outer surface of the second aluminum alloy conductive layer is successively stranded with a first trapezoidal aluminum conductor layer and a second trapezoidal aluminum conductor layer. The first trapezoidal aluminum conductor layer is formed by twisting 19 to 21 first trapezoidal aluminum conductors. The second trapezoidal aluminum conductor layer is formed by twisting 23~25 second trapezoidal aluminum conductors, and the cross-sections of the first trapezoidal aluminum conductor and the second trapezoidal aluminum conductor are trapezoidal;

The stress unit includes a first carbon fiber single wire at the center and 6 second carbon fiber single wires stranded on the outer surface of the first carbon fiber single wire, and the outer surfaces of the first carbon fiber single wire and the second carbon fiber single wire are covered with an aluminum layer;

The first carbon fiber single wire and the second carbon fiber single wire are formed by twisting several carbon fiber precursors according to the left and right twisting directions, and the diameters of the first carbon fiber single wire and the second carbon fiber single wire are 2 mm to 4 mm.

The technical scheme further improved in the above-mentioned technical scheme is as follows:

1. In the above scheme, the twisting direction of the first aluminum single wire in the first aluminum alloy conductive layer is rightward, the twisting direction of the second aluminum single wire in the second aluminum alloy conductive layer is leftward, and the third The twisting direction of the third aluminum single wire in the aluminum conductive layer is rightward.

2. In the above scheme, the number of carbon fiber precursors in the first carbon fiber single wire and the second carbon fiber single wire is at least 100.

3. In the above scheme, the thickness of the aluminum layer is 0.1~0.4mm.

Due to the application of the above-mentioned technical solutions, the utility model has the following advantages compared with the prior art:

1. For the high-strength duralumin stranded wire of the utility model, the first aluminum alloy conductive layer is formed by twisting 10-14 first aluminum single wires, and the second aluminum alloy conductive layer is formed by 16-20 second aluminum single wires Stranded, the outer surface of the second aluminum alloy conductive layer is stranded with the first trapezoidal aluminum conductor layer and the second trapezoidal aluminum conductor layer, its structure is compact, the bending radius is reduced to 6 times the cable diameter, reducing the installation layout It reduces the installation cost and is easier to lay. The high compression coefficient increases the current carrying capacity under the same cross-section, and can effectively prevent rainwater from entering the inside of the wire, reducing or avoiding the freezing of water on the surface of the wire, and greatly improving The anti-ice and snow ability of the wire is improved, and its wide use can greatly improve the reliability and safety of the entire transmission system operation, and has broad application prospects, especially for transmission lines that need to be rebuilt and expanded.

2. The high-strength duralumin stranded wire of this utility model has a small diameter of aluminum-clad carbon fiber single wire, which is convenient for use in a stranded structure. The occasional breakage of a carbon fiber precursor does not affect the performance of the aluminum-clad carbon fiber single wire, and the small defect of a single aluminum-clad carbon fiber single wire will not greatly affect the performance of the entire aluminum-clad carbon fiber stranded reinforced core stress unit, which improves the safety factor of the transmission line; secondly , the thickness of the aluminum cladding layer can be made very thin, so that the diameter of the aluminum-clad carbon fiber single wire can be 2mm~4mm, which is similar to that of galvanized steel wire. The current situation of a single rod with a diameter of 5mm~12mm, the small diameter of a single aluminum-clad carbon fiber wire and the multi-stranded structure make the bending diameter of the stress unit of the wire (aluminum-clad carbon fiber stranded core) greatly reduced, avoiding the current single wire The carbon fiber mandrel has a large diameter and a large bending stress, which is required to be placed on a plate. The construction bending diameter is large, which leads to the spread of the wires, high requirements for the joints, and frequent power failures of the power transmission line due to the hidden dangers of improper crimping of the mandrel.

3. The high-strength duralumin-type stranded wire of the utility model, the aluminum cladding layer has a good coating and compacting effect on the carbon fiber inside, and more than one hundred carbon fiber precursors inside are twisted and knotted. Such a structure The fracture joint of a single carbon fiber filament does not affect the overall performance of the carbon fiber filament, and the breaking force is high, which prolongs the service life of the line; secondly, on the large-span high-voltage overhead transmission line, it has excellent corrosion resistance, light weight, and high breaking force. High, high conductivity and high cost performance, basically do not change the iron tower in the original corridor, achieve a 60% increase in capacity, large carrying capacity, light weight, good sag characteristics, and prolong the service life of the line.

Description of drawings

Accompanying drawing 1 is the utility model high-strength duralumin type stranded wire structure schematic diagram;

Accompanying drawing 2 is the schematic diagram of the structure of the stress unit in the accompanying drawing 1.

In the above drawings: 1. Stress unit; 2. The first aluminum alloy conductive layer; 21. The first aluminum single wire; 3. The second aluminum alloy conductive layer; 31. The second aluminum single wire; 4. The first trapezoidal aluminum conductor 41. The first trapezoidal aluminum conductor; 5. The first carbon fiber single wire; 6. The second carbon fiber single wire; 7. Aluminum layer; 8. Carbon fiber precursor; 9. The second trapezoidal aluminum conductor layer; 91. The second trapezoidal aluminum wire.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment: a high-strength duralumin-type stranded wire, including a force-bearing unit 1 located in the center and a first aluminum alloy conductive layer 2 and a second aluminum alloy conductive layer 3 twisted on the outer surface of the force-bearing unit 1 in sequence;

The first aluminum alloy conductive layer 2 is formed by twisting 12 first aluminum single wires 21, and the second aluminum alloy conductive layer 3 is formed by twisting 18 second aluminum single wires 31;

The outer surface of the second aluminum alloy conductive layer 3 is successively twisted with a first trapezoidal aluminum conductor layer 4 and a second trapezoidal aluminum conductor layer 9, and the first trapezoidal aluminum conductor layer 4 is formed by twisting 20 first trapezoidal aluminum conductors 41. The second trapezoidal aluminum conductor layer 9 is formed by twisting 24 second trapezoidal aluminum conductors 91, and the cross-sections of the first trapezoidal aluminum conductors 41 and the second trapezoidal aluminum conductors 91 are trapezoidal;

The stress unit 1 includes a first carbon fiber single wire 5 at the center and 6 second carbon fiber single wires 6 twisted on the outer surface of the first carbon fiber single wire 5, and the outer surfaces of the first carbon fiber single wire 5 and the second carbon fiber single wire 6 are both coated with an aluminum layer 7;

The first carbon fiber single wire 5 and the second carbon fiber single wire 6 are formed by twisting several carbon fiber precursors 8 in left and right twisting directions, and the diameters of the first carbon fiber single wire 5 and the second carbon fiber single wire 6 are 2.4 or 3 mm.

The twisting direction of the first aluminum single wire 21 in the first aluminum alloy conductive layer 2 is rightward, the twisting direction of the second aluminum single wire 31 in the second aluminum alloy conductive layer 3 is leftward, and the twisting direction of the third aluminum conductive layer The twisting direction of the third aluminum single wire 41 in 4 is rightward.

The number of carbon fiber precursors 8 in the first carbon fiber single wire 5 and the second carbon fiber single wire 6 is at least 100.

The thickness of the aluminum layer 7 is 0.18 or 0.34 mm.

When the above-mentioned high-strength duralumin-type stranded wire is used, the diameter of the aluminum-clad carbon fiber single wire is small, which is convenient for use in a stranded structure. Occasional breakage does not affect the performance of the aluminum-clad carbon fiber single wire, and the small defects of a single aluminum-clad carbon fiber single wire will not greatly affect the performance of the entire aluminum-clad carbon fiber stranded reinforced core force unit, which improves the safety factor of the transmission line; secondly, its aluminum clad The thickness of the coating can be made very thin, so that the diameter of the aluminum-clad carbon fiber single wire can be 2mm~4mm, which is similar to that of galvanized steel wire. The stress unit of the wire is made of multiple strands, which changes the single wire of the current carbon fiber rod. , the current situation with a diameter of 5mm~12mm, the small aluminum-clad carbon fiber single wire diameter and the multi-stranded structure make the bending diameter of the stress unit of the wire (aluminum-clad carbon fiber stranded core) greatly reduced, avoiding the current single carbon fiber mandrel diameter Large, large bending stress, required to be plated, and the construction bending diameter is large, resulting in the spread of the wires, high requirements for the joints, frequent hidden dangers of wire drop and power failure caused by improper construction of mandrel crimping; again, aluminum clad The layer has a good coating and compacting effect on the carbon fiber inside. The more than one hundred carbon fiber precursors inside are twisted and knotted. This structure makes the broken joint of a single carbon fiber not affect the overall performance of the carbon fiber. High breaking force prolongs the service life of the line.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (4)

1. A high-strength duralumin-type stranded wire, characterized in that: it includes a force-bearing unit (1) located in the center and a first aluminum alloy conductive layer (2) twisted on the outer surface of the force-bearing unit (1) in sequence, The second aluminum alloy conductive layer (3); The first aluminum alloy conductive layer (2) is formed by twisting 10-14 first aluminum single wires (21), and the second aluminum alloy conductive layer (3) is formed by 16-20 second aluminum single wires (31 ) twisted; The outer surface of the second aluminum alloy conductive layer (3) is successively twisted with the first trapezoidal aluminum conductor layer (4) and the second trapezoidal aluminum conductor layer (9), and the first trapezoidal aluminum conductor layer (4) consists of 19-21 The first trapezoidal aluminum conductor (41) is stranded, and the second trapezoidal aluminum conductor layer (9) is formed by twisting 23 to 25 second trapezoidal aluminum conductors (91); The stress unit (1) includes a first carbon fiber single wire (5) at the center and 6 second carbon fiber single wires (6) twisted on the outer surface of the first carbon fiber single wire (5), and the first carbon fiber single wire (5) ) and the outer surface of the second carbon fiber single wire (6) are coated with an aluminum layer (7), and the cross-sections of the first trapezoidal aluminum conductor (41) and the second trapezoidal aluminum conductor (91) are trapezoidal; The first carbon fiber single wire (5) and the second carbon fiber single wire (6) are formed by twisting several carbon fiber precursors (8) in left and right twisting directions, and the first carbon fiber single wire (5) and the second carbon fiber single wire (6) The diameter is 2mm~4mm. 2. The high-strength duralumin-type stranded wire according to claim 1, characterized in that: the twisting direction of the first aluminum single wire (21) in the first aluminum alloy conductive layer (2) is rightward, and the first The twisting direction of the second aluminum single wire (31) in the second aluminum alloy conductive layer (3) is leftward, and the twisting direction of the third aluminum single wire (41) in the third aluminum conductive layer (4) is rightward. 3. The high-strength duralumin stranded wire according to claim 1, characterized in that: the number of carbon fiber precursors (8) in the first carbon fiber single wire (5) and the second carbon fiber single wire (6) is at least 100 root. 4. The high-strength duralumin-type stranded wire according to claim 1, characterized in that: the thickness of the aluminum layer (7) is 0.1-0.4 mm.