CN219246412U

CN219246412U - Heat-resistant high-strength aluminum alloy cable

Info

Publication number: CN219246412U
Application number: CN202223570049.XU
Authority: CN
Inventors: 张军虎; 张欢; 吕益品; 陆明渊
Original assignee: Jiangsu Xinchangfeng Cable Co ltd
Current assignee: Jiangsu Xinchangfeng Cable Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-23
Anticipated expiration: 2032-12-29

Abstract

The utility model relates to a cable, in particular to a heat-resistant high-strength aluminum alloy cable, which comprises the following components: the cable comprises a cable core, wherein the cable core is provided with a plurality of conductors, an inner shielding layer, an insulating shielding layer and a metal shielding layer which are sequentially arranged from inside to outside; the buffer layer is coated on the wire core; an elastomer isolation layer coated on the buffer layer; the metal armor layer is coated on the elastomer isolation layer; and the sheath layer is coated on the metal armor layer. The heat-resistant high-strength aluminum alloy cable provided by the utility model can greatly improve the current-carrying capacity, has excellent strength, bending property, tensile resistance and compression resistance, and can ensure the safe, reliable and economical operation of power transmission lines such as power stations, power transmission and distribution lines, power grids and the like.

Description

Heat-resistant high-strength aluminum alloy cable

Technical Field

The utility model relates to a cable, in particular to a heat-resistant high-strength aluminum alloy cable.

Background

The transmission cable varieties used in the places such as power stations, power transmission and distribution, power grids and the like are changed from the conventional steel-cored aluminum stranded wire into a steel-cored aluminum alloy cable with higher current-carrying capacity, and the carbon fiber composite-cored aluminum alloy cable with tensile strength, sag reduction and weight reduction is further improved. However, the heat resistance of the aluminum alloy conductor is improved, the strength, the tensile property and the like of the aluminum alloy conductor are affected, and particularly the physical and mechanical properties of the aluminum alloy conductor in a long-term high-temperature state are greatly affected, so that the service life of the aluminum alloy conductor is reduced; in addition, the twisted aluminum alloy wires with steel cores (or carbon fiber composite cores) can have the defects of loose filling of the aluminum alloy wires, large corona on the surfaces of the wires, large bending radius of the cable and the like.

Disclosure of Invention

In order to solve the problems, the utility model provides a heat-resistant high-strength aluminum alloy cable with higher strength, lighter weight, larger current-carrying capacity and better bending performance, which comprises the following specific technical scheme:

a heat resistant high strength aluminum alloy cable comprising: the cable comprises a cable core, wherein the cable core is provided with a plurality of conductors, an inner shielding layer, an insulating shielding layer and a metal shielding layer which are sequentially arranged from inside to outside; the buffer layer is coated on the wire core; an elastomer isolation layer coated on the buffer layer; the metal armor layer is coated on the elastomer isolation layer; and the sheath layer is coated on the metal armor layer.

Preferably, the conductor includes: a wire; the cross section of the tile-shaped wire is in a fan shape, and the tile-shaped wire is arranged around the lead wire to form at least one tile wire layer.

Preferably, the thickness of the inner shielding layer is 1mm; the thickness of the insulating shielding layer is 0.8mm.

Preferably, the inner shielding layer, the insulating layer and the insulating shielding layer are three co-extrusion layers.

Preferably, the metal shielding layer is an aluminum alloy belt shielding layer.

Preferably, three wire cores are arranged, and the three wire cores are twisted in a back-twisting mode.

Preferably, the buffer layer is not less than two layers.

Preferably, the sheath layer is a polyethylene layer.

Preferably, the method further comprises: and the filling strips are arranged in the buffer layer and are positioned between the adjacent wire cores.

Further, the filling strips are hollow polyethylene filling strips.

Compared with the prior art, the utility model has the following beneficial effects:

the heat-resistant high-strength aluminum alloy cable provided by the utility model can greatly improve the current-carrying capacity, has excellent strength, bending property, tensile resistance and compression resistance, and can ensure the safe, reliable and economical operation of power transmission lines such as power stations, power transmission and distribution lines, power grids and the like.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Detailed Description

The utility model will now be further described with reference to the accompanying drawings.

As shown in fig. 1, the heat-resistant high-strength aluminum alloy cable comprises a wire core 1, a buffer layer 2, an elastomer isolation layer 3, a metal armor layer 4 and a sheath layer 5 which are sequentially arranged from inside to outside, and further comprises a filling strip 6, wherein the filling strip 6 is arranged in the buffer layer 2 and positioned between adjacent wire cores 1, and the filling strip 6 is a hollow polyethylene filling strip.

Wherein, the wire core 1 is provided with three wires, and the back twist type wires are twisted together. The wire core 1 includes a conductor, an inner shielding layer 13, an insulating layer 14, an insulating shielding layer 15, and a metal shielding layer 16, which are sequentially disposed from inside to outside.

The conductor comprises a lead 11 and a tile-shaped wire 12 arranged around the lead 11, the cross section of the tile-shaped wire 12 is in a fan shape, the tile-shaped wire 12 forms a circular tile-shaped wire layer around the lead 11, and two tile-shaped wire layers are arranged. The conductor adopts the aluminum alloy conductor of abnormal shape silk, and center wire 11 is single circular conductor, and every layer of its outer layer all adopts tile type monofilament, and when the conductor is twisted, the tile type silk ring of every layer is buckled together, and the coefficient of compaction of tile type silk is bigger than general circular conductor, nearly seamless joint between the tile type silk of every layer and between the layer.

An inner shielding layer 13 with the thickness of 1.0mm is extruded outside the conductor, a crosslinked polyethylene insulating layer 14 is extruded outside the inner shielding layer 13, and an insulating shielding layer 15 with the thickness of 0.8mm is extruded outside the insulating layer 14. The conductor shielding layer, the insulating layer 14 and the insulating shielding layer 15 form three layers of coextrusion, so that the stability of the cable quality is improved. The metal shielding layer 16 adopts a high-strength aluminum alloy belt shielding layer, so that the safety performance of the operation of the cable is greatly improved, the service life of the cable is prolonged, and the interference of external signals is resisted.

The three shielding wire cores 1 are twisted together in a back-twisting mode, the polyethylene filling strip 6 with the hollow supporting structure is adopted between the

wire cores

1 and 1, so that the roundness of the cable is guaranteed, meanwhile, when the cable runs, heat generated when an aluminum alloy conductor is electrified can be transmitted to the air outside through the hollow structure between the filling strips 6, and compared with a common cable, the heat dissipation effect is good, the running temperature of the cable is improved, and the service life of the cable is prolonged.

Two layers of elastic buffer layers 2 are wrapped outside the cable core which is formed by twisting three insulating cable cores 1 together, and an elastic isolation sleeve is extruded outside the buffer layers 2.

The outside of the isolation sleeve adopts a metal armor layer 4, the metal armor layer 4 is of a steel tape armor or aluminum alloy tape interlocking armor structure, the metal armor layer 4 can resist the external pressure, and the insulation wire core 1 can be protected from damage to a certain extent.

The sheath layer 5 of the cable is wrapped with a layer of polyethylene, and the polyethylene has extremely strong strength and elongation, and has extremely good low temperature resistance and water resistance.

Has the following advantages:

1. the conductor adopts a special-shaped structure, and compared with a common round compressed conductor, the conductor has a larger filling coefficient; the alternating current resistance generated when the cable runs is reduced, the cable transmission current is relatively increased, and the cable is more stable.

2. Because of the adoption of the high-strength aluminum alloy monofilament, the mechanical performance of the aluminum conductor is far away due to the aluminum conductor.

3. The inner shielding layer, the insulating layer 14 and the insulating shielding layer 15 are extruded at one time, no external impurities are immersed, and the electrical performance of the cable is more excellent.

4. The metal shielding adopts the aluminum alloy belt shielding, so that the production cost is greatly reduced compared with the copper belt shielding under the condition of ensuring the safe operation of the cable.

5. The filling adopts the polyethylene filling strip 6 with the hollow structure type, which ensures the roundness of the cable, and simultaneously, when the cable runs, the heat generated by the aluminum alloy conductor when being electrified can be transmitted into the air outside through the hollow structure between the filling strips 6, thereby improving the current-carrying capacity of the cable.

6. The cable core structure is externally wrapped with the buffer layer 2 and the extruded elastomer isolation sleeve, and the double-layer composite structure can reduce the damage of the armor layer to the insulated wire core 1 caused by external pressure, thereby reducing the generation of cable faults.

7. The metal armor layer 4 can prevent the damage of external pressure to the insulated wire core 1.

The high heat-resistant aluminum alloy cable can greatly improve the current-carrying capacity, has excellent strength, bending property, tensile resistance and compression resistance, and can ensure that power transmission lines such as a power station, a power transmission and distribution line, a power grid and the like run safely, reliably and economically.

The service life of the product design is 40 years, the technical index accords with the specification of GB/T3051-2014/IEC 62004:2007, the continuous operation temperature in the air under the rated load can reach 150 ℃, and the short-time allowable operation temperature of the cable 400h is 180 ℃.

The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will occur to those skilled in the art from consideration of the specification and practice of the utility model without the need for inventive faculty, and are within the scope of the claims.

Claims

1. A heat resistant high strength aluminum alloy cable comprising:

the cable comprises a cable core (1), wherein the cable core (1) is provided with a plurality of cable cores, and the cable core (1) comprises a conductor, an inner shielding layer (13), an insulating layer (14), an insulating shielding layer (15) and a metal shielding layer (16) which are sequentially arranged from inside to outside;

the buffer layer (2) is coated on the wire core (1);

an elastomer isolation layer (3), wherein the elastomer isolation layer (3) is coated on the buffer layer (2);

a metal armor layer (4), wherein the metal armor layer (4) is coated on the elastomer isolation layer (3); and

The sheath layer (5), sheath layer (5) cladding is on metal armor layer (4).

2. The heat resistant high strength aluminum alloy cable of claim 1 wherein said conductor comprises:

a wire (11); and

The cross section of the tile-shaped wire (12) is in a fan shape, and the tile-shaped wire (12) is arranged around the lead (11) to form at least one tile wire layer.

3. A heat resistant high strength aluminium alloy cable according to claim 1, characterized in that the thickness of the inner shielding layer (13) is 1mm; the thickness of the insulating shielding layer (15) is 0.8mm.

4. A heat resistant high strength aluminium alloy cable according to claim 1, wherein the inner shielding layer (13), the insulating layer (14) and the insulating shielding layer (15) are three co-extruded layers.

5. A heat resistant high strength aluminium alloy cable according to claim 1, characterized in that the metal shielding layer (16) is an aluminium alloy tape shielding layer.

6. The heat-resistant high-strength aluminum alloy cable according to claim 1, wherein three wire cores (1) are provided, and the three wire cores (1) are twisted in a back-twist manner.

7. A heat-resistant high-strength aluminum alloy cable according to claim 1, characterized in that the buffer layer (2) is not less than two layers.

8. A heat resistant high strength aluminium alloy cable according to claim 1, characterized in that the sheath layer (5) is a polyethylene layer.

9. The heat resistant high strength aluminum alloy cable according to any one of claims 1 to 8, further comprising: and the filling strips (6) are arranged in the buffer layer (2) and are positioned between the adjacent wire cores (1).

10. A heat resistant high strength aluminium alloy cable according to claim 9, characterized in that the filler strip (6) is a hollow polyethylene filler strip.