CN214123553U

CN214123553U - 10kV medium-strength aluminum alloy molded line water-blocking overhead insulated conductor

Info

Publication number: CN214123553U
Application number: CN202120258042.0U
Authority: CN
Inventors: 杨丽伟; 滕兆丰; 张治刚; 胡玉萍
Original assignee: HANGZHOU CABLE CO Ltd
Current assignee: HANGZHOU CABLE CO Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-09-03
Anticipated expiration: 2031-01-29

Abstract

The utility model relates to the technical field of cables, in particular to 10kV medium strength aluminum alloy molded lines overhead insulated wire that blocks water. The core conductor consists of a central round steel wire and 2-5 layers of round aluminum alloy core leads wound on the periphery of the steel wire, a plurality of layers of aluminum alloy type conductors are wound outside the core conductor, the cross sections of the type conductors are trapezoidal, water blocking paste is filled between the type conductors and the core leads and between the type conductors, and a shielding layer is wrapped outside the type conductor at the outermost layer; an inner water-blocking wrapping tape is wound outside the shielding layer, an inner insulating layer is arranged outside the water-blocking wrapping tape, an outer water-blocking wrapping tape is arranged outside the inner insulating layer, an armor layer is arranged outside the outer water-blocking wrapping tape, and a crosslinked polyethylene insulating sheath is arranged outside the armor layer. The whole lead has better tensile strength, excellent waterproofness and better insulativity and wear resistance.

Description

10kV medium-strength aluminum alloy molded line water-blocking overhead insulated conductor

Technical Field

The utility model relates to the technical field of cables, in particular to 10kV medium strength aluminum alloy molded lines overhead insulated wire that blocks water.

Background

Overhead lines are elements for conducting current and transmitting electric energy, play a role of center flow pillars in the transmission of electric energy in distribution networks, operate in the open air throughout the year, not only often bear the action of self tension, but also are affected by various meteorological conditions, and sometimes are eroded by various chemical gases and impurities in the atmosphere, so that the requirement on good conductivity is met, and high mechanical strength is also required.

At present, an overhead line mainly comprises a bare conductor and an insulated conductor, the insulated conductor is suitable for areas with dense urban population, narrow line corridor, areas where the distance between the line for erecting the bare conductor and a building cannot meet the safety requirement, landscaping areas, forest zones, areas with serious dirt and the like, but the core of the conventional insulated conductor generally adopts a compressed round duralumin (LY 8 or LY9 type), a rigid copper (TY type) or an aluminum alloy conductor (LHA or LHB type), the insulation generally adopts polyvinyl chloride (PVC for short), polyethylene (PE for short) and cross-linked polyethylene (XLPE for short), and the common insulation is easy to generate water and an electric tree under the conditions of operation and water contact, so that the aging acceleration of the insulation is caused, and the service life is seriously influenced.

In addition, when an insulated conductor with span of more than 80 meters or larger operation tension is erected for installation, insulation is stripped to expose the conductor, at the moment, rainwater easily permeates from the exposed part of the conductor to the lowest point of the sag of the insulated conductor, and the rainwater contains more impurities, so that the weight of the insulated conductor is increased, the resistance of the conductor is increased after corrosion, the steel-aluminum electrochemical corrosion of the conventional steel-cored aluminum stranded conductor is more serious, the problem is more obvious in a seriously polluted area, and a wire breakage fault is caused in serious conditions.

In order to avoid the above problems, a new power cable needs to be designed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a 10kV intermediate strength aluminum alloy molded lines overhead insulated wire that blocks water has good mechanical strength, insulating nature and waterproof nature through the wire that provides and adapts to corresponding service environment to avoid foretell problem to produce.

The utility model provides a technical scheme that its technical problem adopted is:

a10 kV medium-strength aluminum alloy molded line water-blocking overhead insulated wire comprises a core conductor, wherein the core conductor consists of a central circular steel wire and 2-5 layers of circular aluminum alloy core wires wound on the periphery of the steel wire, a plurality of layers of aluminum alloy molded conductors are wound outside the core conductor, the cross section of each molded conductor is trapezoidal, water-blocking paste is filled between each molded conductor and the core wire and between each molded conductor, and a shielding layer is wrapped outside the outermost molded conductor; an inner water-blocking wrapping tape is wound outside the shielding layer, an inner insulating layer is arranged outside the water-blocking wrapping tape, an outer water-blocking wrapping tape is arranged outside the inner insulating layer, an armor layer is arranged outside the outer water-blocking wrapping tape, and a crosslinked polyethylene insulating sheath is arranged outside the armor layer.

Preferably, the thickness of the profile conductor is greater than the diameter of the core wire.

Preferably, the steel wire is wound with 3-5 layers of core wires.

Preferably, the profile conductor has a thickness that gradually increases from the inner layer to the outer layer.

Preferably, the profile conductor is provided with 3-5 layers.

Preferably, the total thickness of the profile conductor is greater than the diameter of the core conductor.

The utility model has the advantages that: thereby set up the steel wire line through the center and combine core wire to form the core conductor and improve holistic tensile strength, block water through filling and block water cream and the cooperation band that blocks water reaches good waterproof performance, improve holistic crashworthiness through setting up the armor to reach better insulating nature and wearability through setting up hinge polyethylene insulating sheath.

Drawings

Fig. 1 shows a schematic structural diagram of the present invention.

In the figure: the cable comprises a 1-core conductor, 2 steel wires, 3-core wires, 4-shaped conductors, 5 water-blocking paste, 6 shielding layers, 7 inner water-blocking wrapping belts, 8 inner insulating layers, 9 outer water-blocking wrapping belts, 10 armor layers and 11 cross-linked polyethylene insulating sheaths.

Detailed Description

Further refinements will now be made on the basis of the representative embodiment shown in the figures. It should be understood that the following description is not intended to limit the embodiments to one preferred embodiment. On the contrary, it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the embodiments as defined by the appended claims.

Specifically, referring to fig. 1, fig. 1 shows a 10kV medium-strength aluminum alloy molded line water-blocking overhead insulated wire, which includes a core conductor 1 and 3-5 layers of aluminum alloy molded conductors 4 wound outside the core conductor 1, and the core conductor 1 has relatively high strength to achieve better tensile strength; the core conductor 1 consists of a central circular steel wire 2 and 2-5 layers of circular aluminum alloy core leads 3 wound on the periphery of the steel wire 2, and 3-5 layers of core leads 3 are wound on the periphery of the steel wire 2, so that the core leads 3 and the steel wire 2 can be better combined to form a compact shape, and an outer-layer profile-shaped conductor 4 can be conveniently wound; the section of the aluminum alloy type conductor 4 wound outside the core conductor 1 is trapezoidal, water-blocking paste 5 is filled between the type conductor 4 and the core lead 3 and between the type conductors 4, and the water resistance of each layer is improved by the water-blocking paste 5, so that the waterproof performance is better even if the outer sheath is damaged; a shielding layer 6 is arranged outside the outermost molded conductor 4, an inner water-blocking tape 7 is wound outside the shielding layer 6 for multiple water proofing, an inner insulating layer 8 is arranged outside the water-blocking tape, an outer water-blocking tape is arranged outside the inner insulating layer 8, an armor layer 10 is arranged outside the outer water-blocking tape, and a cross-linked polyethylene insulating sheath 11 is arranged outside the armor layer 10.

In the above structure, the thickness of the profile conductor 4 is preferably larger than the diameter of the core wire 3, the thickness of the profile conductor 4 gradually increases from the inner layer to the outer layer of the coal seam, and finally, the total thickness of the profile conductor 4 is larger than the diameter of the core conductor 1.

Above-mentioned wire that obtains sets up steel wire 2 through the center and combines core wire 3 to form core conductor 1 and thereby improves holistic tensile strength, blocks water through filling and blocks water cream 5 and cooperate the band that blocks water to reach good waterproof performance, improves holistic crashworthiness through setting up the armor to reach better insulating nature and wearability through setting up hinge polyethylene insulating sheath.

The insulation adhesion and wear resistance test of the wire is far higher than the indexes of the common insulated wire, and the water resistance is verified by the 10-meter high-fall water resistance without water seepage; in addition, the product is subjected to an insulated conductor fatigue test, and the medium-strength aluminum alloy insulated conductor is proved to have excellent wind and vibration resistance effect; the bending performance of low bending radius under low temperature condition, and the insulating performance and the bending performance under extreme low temperature condition are verified, the low temperature resistance under the temperature of minus 30 to minus 40 ℃ is good in stretching and bending, and the low temperature resistance is far higher than that of a common lead. The construction and installation conditions under the low-temperature and low-bending conditions are met.

For purposes of explanation, specific nomenclature is used in the above description to provide a thorough understanding of the described embodiments. It will be apparent, however, to one skilled in the art that these specific details are not required in order to practice the embodiments described above. Thus, the foregoing descriptions of specific embodiments described herein are presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. It will be apparent to those skilled in the art that certain modifications, combinations, and variations can be made in light of the above teachings.

Claims

1. The utility model provides a 10kV medium strength aluminum alloy molded lines overhead insulated wire that blocks water which characterized in that: the cable comprises a core conductor (1), wherein the core conductor (1) consists of a central circular steel wire (2) and 2-5 layers of circular aluminum alloy core leads (3) wound on the periphery of the steel wire (2), the core conductor (1) is wound with a plurality of layers of aluminum alloy molded conductors (4), the cross sections of the molded conductors (4) are trapezoidal, water-blocking paste (5) is filled between the molded conductors (4) and the core leads (3) and between the molded conductors (4), and a shielding layer (6) is coated outside the outermost molded conductor (4); an inner water-blocking wrapping tape (7) is wound outside the shielding layer (6), an inner insulating layer (8) is arranged outside the inner water-blocking wrapping tape, an outer water-blocking wrapping tape (9) is arranged outside the inner insulating layer (8), an armor layer (10) is arranged outside the outer water-blocking wrapping tape (9), and a cross-linked polyethylene insulating sheath (11) is arranged outside the armor layer (10).

2. The 10kV medium-strength aluminum alloy molded line water-blocking overhead insulated conductor according to claim 1, characterized in that: the thickness of the profile conductor (4) is greater than the diameter of the core wire (3).

3. The 10kV medium-strength aluminum alloy molded line water-blocking overhead insulated conductor according to claim 1, characterized in that: 3-5 layers of core wires (3) are wound on the periphery of the steel wire (2).

4. The 10kV medium-strength aluminum alloy molded line water-blocking overhead insulated conductor according to claim 1, characterized in that: the thickness of the profile conductor (4) is gradually increased from the inner layer to the outer layer.

5. The 10kV medium-strength aluminum alloy molded line water-blocking overhead insulated conductor according to claim 1, characterized in that: the profile conductor (4) is provided with 3-5 layers.

6. The 10kV medium-strength aluminum alloy molded line water-blocking overhead insulated conductor according to claim 1, characterized in that: the total thickness of the profile conductor (4) is larger than the diameter of the core conductor (1).