WO2013131221A1

WO2013131221A1 - Hard round aluminum wire with carbon fiber reinforced composite core

Info

Publication number: WO2013131221A1
Application number: PCT/CN2012/001219
Authority: WO
Inventors: 韦强启; 姜新斌; 王桂花
Original assignee: Wei Qiangqi; Jiang Xinbin; Wang Guihua
Priority date: 2012-03-05
Filing date: 2012-08-30
Publication date: 2013-09-12
Also published as: CN102881368A

Abstract

The present invention relates to an electric-power conducting wire. A hard round aluminum wire with a carbon fiber reinforced composite core is formed by a carbon fiber reinforced composite core (1) and multiple hard aluminum single wires (2). The multiple hard aluminum single wires strand outside the carbon fiber reinforced composite core to form a concentric stranded overhead conducting wire. The carbon fiber reinforced composite core has advantages of fine heat-resistance, safety in use, good reliability, a long service life and the like.

Description

Carbon fiber composite core hard round aluminum wire TECHNICAL FIELD This invention relates to electric power wire. BACKGROUND OF THE INVENTION Existing carbon fiber composite core wires have the disadvantages of poor heat resistance, poor safety and reliability, and short service life. SUMMARY OF THE INVENTION The present invention provides a carbon fiber composite core soft aluminum profile. The invention solves the problems of poor heat resistance, poor safety and reliability, and short service life of the existing carbon fiber composite core wire. In order to solve the above problems, the present invention adopts the following technical solutions: The carbon fiber composite core hard round aluminum wire is composed of a carbon fiber composite core and a plurality of hard aluminum single wires, and a plurality of hard aluminum single wire spirals are twisted on the carbon fiber composite core to form a concentric stranded overhead wire. . The invention has the advantages of excellent heat resistance, good safety and reliability in use, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of the present invention; Figure 2 is a side view of the present invention. Symbols in the figure: Carbon fiber composite core 1, hard aluminum single wire 2. detailed description The invention will now be described in detail with reference to the preferred embodiments. As shown in Figure 1-2, the carbon fiber composite core hard round aluminum wire is composed of a carbon fiber composite core and a plurality of hard aluminum single wires, and a plurality of hard aluminum single wire spirals are twisted on the outside of the carbon fiber composite core to form a concentric stranded overhead wire. Technical requirements of the present invention: 1 The hard aluminum single wire conductor should be concentrically twisted from a plurality of formed hard aluminum single wire and carbon fiber composite core. The hard aluminum single wire used before twisting should meet the following requirements.

1. 1 Surface quality The surface of hard aluminum single wire should be smooth and uniform in shape, and must not have any defects that are not commensurate with good industrial products.

1. 2 tensile strength

The tensile strength of hard aluminum single wire should meet the requirements of GB/T17048-2009. 1. 3 resistivity

The resistivity of the hard aluminum single wire at 20 ° C shall not be greater than 0. 028264 Ω · mm7m.

1. 4 diameter and tolerance

The diameter and allowable deviation of the single line of hard aluminum shall comply with the requirements of GB/T17048-2009. 1. 5 Density To calculate the nominal weight and cross-sectional area of a single hard aluminum wire, the density of aluminum at 20 ° C is 2. 703 g/cm.

1. 6 winding performance Winding 8 times on a mandrel of the same diameter as the diameter of the hard aluminum wire at a speed of no more than 60 _r / min, re-winding 6 turns, and re-tightly winding, the hard aluminum wire should not crack.

2 carbon fiber composite core

The carbon fiber composite core shall comply with the following regulations.

2. 1 Surface quality

Carbon fiber composite cores should be round, smooth, crack-free, fiber-free, and other defects that are inconsistent with good industrial products.

2. 2 tensile strength

The tensile strength of the carbon fiber composite core shall comply with the requirements of Table 1. When calculating the tensile force of the carbon fiber composite core based on the tensile strength, the measured diameter of the carbon fiber composite core should be used.

Tensile strength of carbon fiber composite core

2. 3 diameter and diameter deviation

The diameter deviation and out-of-roundness of the carbon fiber composite core shall comply with the requirements of Table 2.

Table 2 Carbon fiber composite core diameter deviation and out-of-roundness

2. 4 linear expansion coefficient

The coefficient of linear expansion of the carbon fiber composite core shall comply with the requirements of Table 3.

Table 3 Linear expansion coefficient of carbon fiber composite core Model line expansion coefficient *10 ^ft (l/°C)

Tl 1.80

T2 1.70

Τ3 1.60

Density

To calculate the nominal weight, the density of the carbon fiber composite core is shown in the table.

Table 4 Density of carbon fiber composite core

2.6 Length and length tolerances

The carbon fiber composite core should have a single delivery length of not less than 5000m, allowing the highest delivery according to the purchaser's requirements. The length tolerances are -0% and +0.5%. Unless the purchaser has an agreement with the manufacturer in advance, delivery is allowed within the length specified by the agreement between the parties. 2.7 Environmental performance 2.7.1 High temperature performance

The carbon fiber composite core should be allowed to stand for 3 hours in a high temperature environment of 18 CTC, and its tensile strength loss rate is not more than 5% of the tensile strength at normal temperature. 2.7.2 Low temperature performance (to be verified)

The carbon fiber composite core should be allowed to stand at a low temperature of -40 ° C for 3 hours, and its tensile strength loss rate is not more than 5% of the tensile strength at normal temperature. 2.7.3 UV resistance (to be verified)

The carbon fiber composite core should pass a fluorescent ultraviolet lamp with a wavelength of less than 400 nm, and the irradiance is 1.55 W/m ² *nm. After 1000 hours of exposure, the surface is not sticky, no peeling and cracking, and the tensile strength loss rate is not more than 5% of tensile strength at room temperature. 2. 8 winding performance

The carbon fiber composite core shall be wound on the cylinder of 55 times its own diameter at a winding speed of not more than 5r/min for 5 turns, and the surface layer shall not be cracked or peeled.

2. 9 torsion performance

The carbon fiber composite core shall be twisted by a sample of 200 times its own diameter at a torsion speed of not more than 2r/min for 720°, and the surface layer shall not be cracked.

2. 10 flattening performance

The carbon fiber composite core shall be capable of withstanding at least 25% of its rated breaking force. The pressure is stable. The contact length is 100mm. The pressure is tested on the mandrel. The surface layer is not cracked or peeled. 2. 11 corrosion resistance

The carbon fiber composite core should be able to be sprayed through a 5% sodium chloride solution at a running temperature for at least 15 test cycles, and the surface should be smooth and free of visible corrosion.

2. 12 damp heat aging

The carbon fiber composite core should be placed in the 15CTC environment for lh, then cooled by room temperature water spray for lh, and the cycle test is repeated 100 times. The tensile strength loss rate should not be greater than 10% of the tensile strength at normal temperature.

2. 13 heat aging life (to be verified)

The thermal life evaluation of carbon fiber composite core can be selected according to IEC60216 standard: 180 °C (190 °C), 195 °C (205 °C), 210 °C (220 °C) three-point aging temperature, tensile strength 50% as the end of life parameter, the minimum heat aging temperature point should be no less than 5000h, the highest temperature point should be no less than 100h (if possible should be less than 500h), otherwise the temperature The point should be re-selected. According to this test, the heat-resistant temperature of 150 ° C ( 160 ° C ) should not be less than 40 years.

2. 14 connector

The carbon fiber composite core does not allow any form of joint.

3 wire structure

A recommended wire structure size table is given in Appendix B. According to the actual needs of the project, both the supplier and the buyer may extend the relevant wire specifications according to the design requirements and shall comply with the performance requirements specified in this standard.

4 finished wire

The surface of the wire should be free of defects visible to the naked eye (or normal corrected vision), such as obvious scratches, indentations, etc., and must not have any defects that are not commensurate with good industrial goods. 5 twisted

5. 1 All hard aluminum single wires of the wire shall be concentrically twisted.

5. 2 The adjacent layer twisting should be reversed. Unless otherwise specified by the user at the time of ordering, the outermost stranding direction shall be right.

5. 3 Each layer of single wire shall be evenly and tightly stranded on the carbon fiber composite core or inner stranded wire. 5. 4 The stranded pitch ratio of the conductor shall comply with the requirements of Table 5.

Stranded pitch ratio of wire

5. 5 For conductors with multiple layers, the pitch-to-diameter ratio of any layer shall not be greater than the pitch-to-diameter ratio of its adjacent inner layer. 5. 6 Before twisting, the temperature of all the single wires constituting the wires should be basically the same.

6 connector

6. 1 The carbon fiber composite core does not allow any form of joint during the stranding process.

6. 2 Each manufactured length of wire before twisting shall not be used with a molded hard aluminum single wire as described in paragraph 4. The outermost hard aluminum single wire of the finished wire shall not have any joints.

6. 3 There shall be no formed hard aluminum single-wire joints made in order to meet the wire length requirements during the stranding process.

6. 4 In the stranding process, if the hard aluminum single wire is accidentally broken, as long as the fracture is not caused by the inherent defects of the single wire or by the use of the short length hard aluminum single wire, the hard aluminum single wire allows the joint. The joint shall conform to the geometry of the original single wire, ie the joint shall be lightened, the shape being the same as the original shape, and avoiding bending.

The joint of hard aluminum single wire shall not exceed the values specified in Table 6. In the same single line or in the whole strand, the distance between any two joints should be no less than 15m.

The joint can be cold pressed against the crucible. These joints should be made in accordance with good manufacturing practices. The strength of the joint after splicing should reach 130Mpa and above.

Table 6 Number of permissible joints for hard aluminum single wire

7 line density - mass per unit length 7. 1 The unit length of the aluminum wire after the stranding of the hard aluminum single wire and the carbon fiber composite core is calculated according to the stranding increment specified in Table 7 and based on the cross-sectional area of the hard aluminum single wire. Aluminum density: 2. 703 g / cm ^{: i} at 20 ° C, carbon fiber composite core density according to Table 4. Table 7 Standard increment of hard aluminum round wire due to stranding a

8 The tensile breaking force of the wire shall be rated for the sum of the tensile force of the single-wire part of the hard aluminum and the tensile force of the composite core of the carbon fiber. For specification and safety reasons, the tensile force of the aluminum part is the product of the stranded aluminum area and the minimum tensile strength of the hard aluminum single line of 95%; the tensile force of the carbon fiber composite core is the product of the composite core area and its minimum tensile strength of 98%. 9 DC resistance of the wire - Take the area of the conductive aluminum part of the wire at 0 °C and take the 0. 028264 Ω · mm7 _m and the standard increment shown in Table 7 to calculate the DC resistance of the wire. It is to be noted that the DC resistance temperature increment coefficient is 0. 00403. It is to be understood that the above embodiments are merely illustrative of the invention and are not intended to limit the embodiments. Other variations or modifications of the various forms may be made by those skilled in the art in light of the above description. There is no need and no way to exhaust all of the implementations. Obvious changes or variations resulting therefrom are still within the scope of the invention.

Claims

Claim

1. A carbon fiber composite core hard round aluminum wire, which is characterized in that: a carbon fiber composite core and a plurality of hard aluminum single wires are formed, and a plurality of hard aluminum single wire spirals are twisted on the outer side of the carbon fiber composite core to form a concentric girder overhead wire.