CN2678067Y - Self-vibration absorbing insulation aerial cable - Google Patents

Abstract

The utility model relates to a self-damping insulating overhead cable, which belongs to the field of overhead cable manufacturing. The insulated overhead cable of the utility model is formed by twisting a single insulated wire or a bundle of a plurality of insulated wires. The structure of a single insulated wire is successively from the inside to the outside: a reinforced core stranded body, an anti-corrosion lubricating grease layer, an aluminum stranded wire layer, and an insulating layer. There is a certain gap between the layers of aluminum stranded wires, and between the layers of aluminum stranded wires and the reinforced core stranded body coated with anti-corrosion lubricating grease layer. The individual aluminum wires of the aluminum strand layer are wedge-shaped. The strengthening core strand is made of multiple galvanized steel wires or aluminum alloy wires. The number of layers of the aluminum twisted wire layer can be determined according to the transmission capacity of the line. When the insulated aerial cable of the utility model is twisted from a plurality of insulated conductors, each insulated conductor has a different number of raised ridges for phase sequence identification on the insulating layer. The insulated overhead cable can improve the safety factor of the transmission line, and avoid various accidents in the line due to strong vibration or fatigue strand breakage of the overhead cable conductor.

Description

A self-damping insulated aerial cable

Technical field:

The utility model relates to an overhead cable and belongs to the field of insulating overhead cable manufacture.

Background technique:

At present, domestic insulated overhead cables are classified from conductor materials, and can be divided into copper core overhead cables, aluminum core overhead cables, aluminum alloy insulated overhead cables, steel core insulated overhead cables and high-strength aluminum alloy reinforced insulated overhead cables. The conductors of these overhead cables are tightly stranded structures, and there are extruded insulation layers or shielding layers and insulation layers on the conductor surface; these overhead cables are in close contact with each other from the conductor body to the insulation layer, so the overhead cables After being laid, when subjected to external force such as wind force, the overhead cable between the tower pole and the tower pole will vibrate as a whole, and even resonate with the external force, which will cause the cable conductor to break due to strong vibration or fatigue. The stock part will be used as the electric field and stress concentration point, so it will be destroyed soon, resulting in circuit breaker, blackout accident and even personal safety accident, resulting in major economic losses.

Invention content:

The utility model aims at the above defects of the prior art, and provides a self-damping insulated overhead cable, which can avoid various accidents caused by strong vibration or fatigue strand breakage of the cable conductor.

Technical solution of the utility model: the insulated aerial cable of the utility model is formed by twisting a single insulated conductor or a bundle of insulated conductors. The structure of a single insulated wire is a reinforced core strand, an anti-corrosion lubricating grease layer, an aluminum strand layer, and an insulating layer from the inside to the outside. There is a certain gap between the aluminum stranded wire layer and the aluminum stranded wire layer, and between the aluminum stranded wire layer and the reinforced core stranded body coated with an anti-corrosion lubricating grease layer. The individual aluminum wires of the aluminum strand layer are wedge-shaped.

The reinforced core strand is formed by twisting multiple galvanized steel wires or aluminum alloy wires. The number of layers of the aluminum twisted wire layer can be determined according to the transmission capacity of the line.

When the insulated overhead cable of the utility model is twisted from a plurality of insulated conductors, each insulated conductor has a different number of raised ridges for phase sequence identification on the insulating layer.

The utility model has the following beneficial effects:

1. There is a certain gap between the aluminum stranded wire layers of the insulated overhead cable of the utility model, between the aluminum stranded wire layer and the reinforced core stranded body coated with an anti-corrosion lubricating grease layer, when the overhead cable is vibrated by external forces such as wind force, Due to the existence of gaps, the vibration frequency of each layer of the cable is different and interferes with each other, so that the energy of external vibration can be automatically consumed to achieve the effect of shock absorption, improve the safety factor of the transmission line, and avoid economic losses;

2. Coating an anti-corrosion lubricating grease layer outside the reinforced core stranded body can effectively prevent impact wear and electrochemical corrosion between the reinforced core stranded body and the aluminum stranded wire layer caused by vibration. At the same time, when the reinforced core stranded body is galvanized When the steel wire is stranded, it has a certain protective effect on the galvanized layer;

3. The aluminum wire of the aluminum strand layer of the utility model is wedge-shaped, and the surface of the conductor is round and smooth, which evens the electric field on the surface of the conductor;

4. The strengthening core stranded body is set in the center of the cable, which greatly improves the overall breaking resistance of the cable, and can increase the distance between the cable erection tower pole and the tower pole, thereby saving the laying cost.

Description of drawings:

Fig. 1 - the structural diagram of a single insulated conductor of the present invention

Fig. 2 - structure diagram of multiple insulated conductors of the present invention

1——strengthening core stranded body 2——anti-corrosion lubricating grease layer 3——aluminum strand layer 4——insulating layer 5——gap 6——ridge

Detailed ways:

The implementation manner will be further described below in conjunction with the accompanying drawings. As shown in Figure 1, the structure of the single cable conductor of the present utility model is sequentially from the inside to the outside a strengthening core stranded body (1), an anti-corrosion lubricating grease layer (2), an aluminum stranded wire layer (3), and an insulating layer (4). The reinforced core strand (1) is formed by stranding a plurality of galvanized steel wires or aluminum alloy wires. The number of layers of the aluminum twisted wire layer (3) can be determined according to the transmission capacity of the line. There is a certain gap (5 ). The single aluminum wire of the aluminum stranded wire layer (3) is wedge-shaped.

As shown in Figure 2, the utility model can be a single insulated wire, and can also be formed by twisting a plurality of insulated wire bundles. Select according to the needs of the specific line. When the insulated aerial cable of the utility model is twisted from a plurality of insulated conductors, there are different numbers of ridges (6) used for phase sequence identification on the insulation layer of each insulated conductor.

Claims (2)

1. The utility model is a self-damping insulated overhead cable, which is composed of a single or multiple insulated conductors. The structure of a single insulated conductor is a reinforced core stranded body, an anti-corrosion lubricating grease layer, and an aluminum stranded wire from the inside to the outside. layer, insulation layer, characterized in that: there is a certain gap between the aluminum stranded wire layer and the aluminum stranded wire layer, between the aluminum stranded wire layer and the reinforced core stranded body coated with anti-corrosion lubricating grease layer; The aluminum wire is wedge-shaped. 2. A self-damping insulated overhead cable according to claim 1, characterized in that: when the cable is twisted from a plurality of insulated wires, there are different numbers of wires on the insulating layer of each insulated wire for phase Ridges for sequence identification.