CN213519363U - Cross-linked low-density polyethylene insulated 10kV overhead cable - Google Patents

Abstract

The utility model discloses an insulating 10kV aerial [ insulated ] cable of crosslinked low density polyethylene, belongs to wire and cable technical field, including steel core and the duralumin layer of transposition in the steel core outside, the steel core is twisted by seven galvanized steel wires and is formed, the outside on duralumin layer has wrapped up conductor shielding layer, buffer layer and insulating layer in proper order, the duralumin layer is formed by duralumin monofilament stically pressing and stranding; the outside of insulating layer is equipped with many and is the circumference and distribute and be spiral helicine elastic strip, and the outside of buffer layer is equipped with a plurality of buffer strips that are the circumference and distribute, and the outside of this buffer strip is the cambered surface structure, and the inside of buffer strip is equipped with three thin steel wires that the pair twist formed. The utility model discloses an elasticity strip that polyurethane material made, its advantage lies in having the resilience force of preferred, avoids this cable to shake under the strong wind and take place the situation of great bending, has improved the anti bending property of cable, and the tensile strength of cable can be improved to the thin steel wire that three pair twists formed.

Description

Cross-linked low-density polyethylene insulated 10kV overhead cable

Technical Field

The utility model relates to a wire and cable technical field specifically says an insulating 10kV aerial [ insulated ] cable of crosslinked low density polyethylene.

Background

Before 2008, three voltage grades of 1KV, 10KV and 35KV are available for alternating current rated voltages of domestic overhead insulated cables, for many years, medium-voltage and low-voltage overhead insulated cables develop rapidly, but the 35KV level does not form batch production and large-scale application all the time, and in GB/T14049-2008 10KV overhead insulated cables newly published in 2008 in 6 months, the voltage grade of 35KV is deleted, so that the voltage grade of the overhead insulated cables shaped by national standards is only 1KV and 10KV at present.

In the process of implementing the embodiment of the invention, the inventor finds that at least the following defects exist in the background art:

the overhead cable is mainly used for long-distance transmission of electric power, the cable is often required to be lifted over mountains and erected by a supporting tower, the tensile property of the cable is high, the cable is overhead for a long time and exposed outside, and the cable is dragged when the cable is exposed to severe weather, so that the waterproof property and the windproof property of the cable are also high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an insulating 10kV aerial [ insulated ] cable of crosslinked low density polyethylene to solve the problem that proposes in the above-mentioned background art.

The technical scheme of the utility model is that: including steel core and the duralumin layer of transposition in the steel core outside, the steel core is formed by seven galvanized steel wires transposition, wherein: the outer side of the hard aluminum wire layer is sequentially wrapped with a conductor shielding layer, a buffer layer and an insulating layer, and the hard aluminum wire layer is formed by tightly pressing and stranding hard aluminum monofilaments;

a plurality of spiral elastic strips which are circumferentially distributed are arranged on the outer side of the insulating layer, and the elastic strips are made of polyurethane materials;

the outside of buffer layer is equipped with a plurality of buffer strips that are the circumference and distribute, and the outside of this buffer strip is ARC structure, the inside of buffer strip is equipped with the thin steel wire that three pair twists formed.

Preferably, in order to further improve the conductivity of the cable, the conductor shielding layer adopts a cross-linked semi-conductive inner shielding material.

Preferably, the insulating layer is a crosslinked polyethylene insulating layer.

Preferably, in order to improve the high-temperature and low-temperature strength of the cable, the outer side of the buffer layer is coated with fluorinated ethylene propylene.

Preferably, in order to improve the rain resistance of the cable, the outer surface of the insulating layer is coated with a waterproof corrosion-resistant layer.

Preferably, in order to improve the impact strength of the cable, the buffer layer is a soft silicone rubber layer.

The utility model discloses an improve and provide an insulating 10kV aerial [ insulated ] cable of crosslinked low density polyethylene here, compare with prior art, have following improvement and advantage:

the elastic strip made of the polyurethane material has the advantages of having better resilience force, avoiding the situation that the cable is greatly bent due to the fact that the cable shakes under strong wind, improving the bending resistance of the cable, and avoiding the situation that rainwater is accumulated on the surface of the cable due to the fact that the elastic strip is arranged to be spiral.

And secondly, the tensile strength of the cable can be improved by the three twisted thin steel wires, the buffer strip can play a certain buffer effect on the cable to protect the steel core and the hard aluminum wire layer in the cable, and the cable is prevented from being damaged in the laying and transporting processes due to external force extrusion.

And thirdly, the waterproof corrosion-resistant layer has certain waterproof and corrosion-resistant performances, so that the cable can bear the corrosion of rainwater.

Drawings

The invention is further explained below with reference to the figures and examples:

fig. 1 is a first schematic sectional view of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention.

Description of reference numerals:

1. a steel core; 2. galvanized steel wire; 3. a hard aluminum wire layer; 4. a conductor shield layer; 5. a buffer layer; 6. an insulating layer; 7. an elastic strip; 8. a buffer strip; 81. thin steel wires.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 2, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses an improve and provide an insulating 10kV aerial [ insulated ] cable of crosslinked low density polyethylene here, as shown in fig. 1-fig. 2, including steel core 1 and the duralumin wire layer 3 of transposition in the steel core 1 outside, steel core 1 is formed by seven galvanized steel wires 2 transposition, wherein: the outer side of the hard aluminum wire layer 3 is sequentially wrapped with a conductor shielding layer 4, a buffer layer 5 and an insulating layer 6, and the hard aluminum wire layer 3 is formed by tightly pressing and twisting hard aluminum monofilaments;

a plurality of spiral elastic strips 7 which are circumferentially distributed are arranged on the outer side of the insulating layer 6, and the elastic strips 7 are made of polyurethane materials; the elastic strip 7 made of the polyurethane material has the advantages of having better resilience force, avoiding the situation that the cable is greatly bent due to the fact that the cable shakes under strong wind, improving the bending resistance of the cable, and having the advantage that the elastic strip 7 is arranged to be spiral, avoiding the situation that the rainwater is accumulated on the surface of the cable due to the fact that the rainwater is arranged to be linear, and enabling the rainwater to slide out along the spiral elastic strip 7 and drop under the gravity of the rainwater.

A plurality of buffer strips 8 distributed in a circumferential manner are arranged on the outer side of the buffer layer 5, the outer side of each buffer strip 8 is of an arc surface structure, and three twisted thin steel wires 81 are arranged inside each buffer strip 8; three thin steel wires 81 that the pair twist formed can improve the tensile strength of cable, and buffering strip 8 can play certain cushioning effect to the cable, comes to protect the inside steel core 1 of cable and duralumin layer 3, avoids the cable to make the inside damage that takes place of cable because of external force extrusion in laying, the transportation.

Specifically, in order to further improve the conductivity of the cable, the conductor shielding layer 4 is made of a cross-linked semiconductive inner shielding material.

Specifically, the insulating layer 6 is a crosslinked polyethylene insulating layer.

Specifically, in order to improve the high-temperature and low-temperature strength of the cable, the outer side of the buffer layer 5 is coated with fluorinated ethylene propylene.

Specifically, in order to improve the rain resistance of the cable, the outer surface of the insulating layer 6 is coated with a waterproof corrosion-resistant layer, and the waterproof corrosion-resistant layer has certain waterproof and corrosion-resistant properties, so that the cable can bear the corrosion of rain.

Specifically, in order to improve the impact strength of the cable, the buffer layer 5 is a soft silicone rubber layer.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. The utility model provides an insulating 10kV overhead cable of crosslinked low density polyethylene, includes steel core (1) and strand hard aluminum wire layer (3) in the steel core (1) outside, and steel core (1) is formed by seven galvanized steel wire (2) transposition, its characterized in that: the outer side of the hard aluminum wire layer (3) is sequentially wrapped with a conductor shielding layer (4), a buffer layer (5) and an insulating layer (6), and the hard aluminum wire layer (3) is formed by tightly pressing and twisting hard aluminum monofilaments;

a plurality of spiral elastic strips (7) which are circumferentially distributed are arranged on the outer side of the insulating layer (6), and the elastic strips (7) are made of polyurethane materials;

the outside of buffer layer (5) is equipped with a plurality of buffer strip (8) that are the circumference and distribute, and the outside of this buffer strip (8) is ARC structure, the inside of buffer strip (8) is equipped with three thin steel wire (81) that the pair twist formed.

2. The cross-linked low density polyethylene insulated 10kV overhead cable of claim 1, wherein: the conductor shielding layer (4) is made of a cross-linked semi-conductive inner shielding material.

3. The cross-linked low density polyethylene insulated 10kV overhead cable of claim 1, wherein: the insulating layer (6) is a cross-linked polyethylene insulating layer.

4. The cross-linked low density polyethylene insulated 10kV overhead cable of claim 1, wherein: the outer side of the buffer layer (5) is coated with fluorinated ethylene propylene.

5. The cross-linked low density polyethylene insulated 10kV overhead cable of claim 4, wherein: the outer surface of the insulating layer (6) is coated with a waterproof corrosion-resistant layer.

6. The cross-linked low density polyethylene insulated 10kV overhead cable of claim 1, wherein: the buffer layer (5) is a soft silicon rubber layer.

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