CN214671876U

CN214671876U - Waterproof outdoor power cable

Info

Publication number: CN214671876U
Application number: CN202120524686.XU
Authority: CN
Inventors: 田守纪; 余德平; 程伟; 张鹏飞
Original assignee: Zhejiang Wanma Co Ltd
Current assignee: Zhejiang Wanma Co Ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-11-09
Anticipated expiration: 2031-03-12

Abstract

The utility model discloses a waterproof outdoor power cable, it is big, be difficult to satisfy the problem that soaks the use for a long time in aqueous to have overcome prior art's external diameter, including the conductor, the conductor cross section is semi-circular, and the conductor is equipped with the crosslinked polyethylene outward and insulates, and the crosslinked polyethylene insulation outside is equipped with shielding structure, and shielding structure is equipped with the fine yarn weaving layer of glass outward, and the fine yarn weaving layer of glass is equipped with the asphalt coating outward, and the asphalt coating is wrapped outward and is had the area that blocks water. The utility model discloses a semicircular conductor has with low costs, the external diameter is little, the dead weight is low and the high advantage of factor of safety of bending property, and the interference killing feature of cable is more superior.

Description

Waterproof outdoor power cable

Technical Field

The utility model belongs to the technical field of the power cable and specifically relates to a waterproof outdoor power cable.

Background

With the development of science and technology and the improvement of the daily living standard of people, the requirements of special occasions on the appearance and the portability of the electric wire and the electric cable are higher and higher. At present, this kind of domestic power cable conductor adopts the soft copper core circular conductor of stranded more, simultaneously because this kind of power cable is mostly 2 heart yearns, when adopting circular conductor, the stranding external diameter is big, lead to the cable when the same insulation and sheath thickness, circular copper core conductor cable external diameter is great, and the overall cost is higher, weight ratio adopts the soft core conductor of aluminum alloy to be 30% by weight about simultaneously, and when the installation of subtropical zone coastal climate area was moved, because the torrential rain weather is more, ponding is faster, it is more, long-term ponding phenomenon is general, ordinary waterproof cable can't satisfy the requirement of soaking the use in aqueous for a long time.

For example, a publication of "round cable, junction box, flat cable and round cable mutual conversion method" in chinese patent literature has a publication number CN110289509A, wherein the round cable includes: circular cable body, inside have a plurality of sinle silks, each not transposition each other between the sinle silk, each sinle silk is for being made by stranded patchcord. Although the interference killing feature is strong when adopting circular cable, the stranding external diameter is very big, and the outside of circular cable body still is provided with a metallic shield layer especially in this scheme, and layer upon layer stack can lead to the cable circular copper core conductor cable external diameter great when the same insulation and sheath thickness, and the overall cost is higher, and in the installation because the external diameter can also lead to the condition that ponding is more fast when torrential rain weather greatly, long-term ponding phenomenon is general.

Disclosure of Invention

The utility model relates to an overcome prior art's external diameter big, be difficult to satisfy the problem of soaking the use in aqueous for a long time, provide a waterproof outdoor power cable, the whole weight of cable is lighter, is favorable to practicing thrift the cost, reduces the cable external diameter, and satisfies the requirement of long-term waterproof soaking under the heavy rain weather.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a waterproof outdoor power cable, includes the conductor, and the conductor cross section is semi-circular, and the conductor is equipped with the crosslinked polyethylene outward and insulates, and the crosslinked polyethylene insulation outside is equipped with shielding structure, and shielding structure is equipped with the fine yarn weaving layer of glass outward, and the fine yarn weaving layer of glass is equipped with the asphalt coating outward, and the asphalt coating is wrapped up outward and is had the area that blocks water.

The conductor is pressed into a semicircle, the outer diameter of the finished cable is reduced by about 15%, the cost of the cable is greatly reduced, the glass fiber yarn is adopted to weave outside the tinned copper wire shield to increase the adhesive force of the cable, so that asphalt coating is facilitated, and the cable can be soaked in water for a long time when asphalt is adopted as a waterproof layer because the asphalt does not absorb water.

Preferably, the conductors are symmetrically arranged in the power cable.

Preferably, the conductor is formed by twisting a plurality of aluminum alloy wires, and the twisted conductor is annealed.

Preferably, the outer diameter of the aluminum alloy wire is less than 0.5 mm.

Preferably, the aluminum alloy wire has an elongation at break of more than 10% and an elongation strength of more than 98 MPa.

Preferably, the shielding structure is double-layer and comprises an aluminum-plastic composite belt and a tinned wire braided shield, the aluminum-plastic composite belt is arranged on the outer side of the cross-linked polyethylene insulation, the tinned wire braided shield is arranged on the outer side of the aluminum-plastic composite belt, the braiding density of the tinned wire braided shield is greater than 80%, and the braiding density of the glass fiber yarn braided layer is greater than 60%.

Preferably, the asphalt coating is wrapped with a water-blocking tape, and an ultraviolet-resistant polyethylene sheath is arranged outside the water-blocking tape.

Preferably, water-blocking filling is arranged between the cross-linked polyethylene insulation tape and the aluminum-plastic composite tape.

Therefore, the utility model discloses following beneficial effect has:

1. the utility model adopts a plurality of aluminum alloy wire stranded conductors with the outer diameter less than 0.5mm, and the conductors are annealed in an aging annealing furnace after being stranded, under the same current-carrying capacity with the copper core cable, the self weight of the cable is reduced by about 45 percent, meanwhile, the conductors are pressed into a semicircle in the insulation extrusion process, the outer diameter is reduced by about 15 percent after the cable finished product, and the cable cost is greatly reduced; the bending performance of the cable is ensured while the dead weight is reduced;

2. the insulating mechanical property and the insulating waterproof property of the cable are greatly improved by adopting a crosslinked polyethylene insulating structure which is difficult to absorb water, the adhesive force of the cable is increased by adopting glass fiber yarn to weave outside the tinned copper wire shield, so that asphalt is convenient to coat, and the cable can be soaked in water for use for a long time when asphalt is used as a waterproof layer because the asphalt does not absorb water, so that the safety coefficient is high;

3. the double-layer shielding structure of the aluminum-plastic composite belt and the tinned copper wire braided shielding is adopted, so that the anti-interference performance of the cable is more excellent;

4. the sheath adopts ultraviolet-resistant polyethylene, so that the service life of the cable is prolonged, and the cable blocks water.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment.

In the figure: 1. the cable comprises a conductor 2, a cross-linked polyethylene insulation 3, an aluminum-plastic composite tape 4, a tinned wire braided shield 5, a glass fiber yarn braided layer 6, an asphalt coating 7, a water blocking tape 8, an ultraviolet-resistant polyethylene sheath 9 and water blocking filling.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

A waterproof outdoor power cable is shown in figure 1 and sequentially comprises a conductor 1, a cross-linked polyethylene insulation 2, an aluminum-plastic composite tape 3, a tinned wire braided shield 4, a glass fiber yarn braided layer 5, an asphalt coating 6, a water blocking tape 7 and an ultraviolet-resistant polyethylene sheath 8 from inside to outside, and a water blocking filling 9 is arranged between the cross-linked polyethylene insulation 2 and the aluminum-plastic composite tape 3.

The cross section of the conductor is semicircular, a plurality of aluminum alloy wires which are drawn by 8R76 series aluminum alloy rods and are less than or equal to 0.50mm are stranded to form the conductor, the conductor is annealed by an aging annealing furnace after being stranded, and the conductor is cooled and then pressed into semicircular extruded cross-linked polyethylene for insulation; the combined mode not only greatly lightens the weight of the cable, but also greatly reduces the outer diameter of the cable compared with a round conductor, and simultaneously adopts a semicircular structure, and the cable can be soaked in water for electrified operation for a long time by adopting an asphalt waterproof layer, and the insulation resistance is stable and has no reduction.

The semi-circular stranded aluminum alloy conductor is a brand-new cable internal structure relative to a circular stranded copper wire, the semi-circular stranded aluminum alloy conductor is adopted, the outer diameter of a finished wire can be made smaller on the premise of meeting the requirement of adopting the same thickness of an insulating sheath, and meanwhile, an aluminum alloy material with specific gravity only being copper specific gravity 1/3 is adopted, so that the whole weight of the cable is lighter.

The utility model discloses an installation as follows: when the cable is used outdoors, because a plurality of aluminum alloy wires which are less than or equal to 0.50mm are adopted for the stranded conductor, and the stranded conductor is annealed, the flexibility and the bending performance are good; the cable is light in total weight and can be installed easily; the cable insulation adopts crosslinked polyethylene insulation which is difficult to absorb water and has excellent insulation resistance, and the water resistance performance of the cable insulation is optimized on the premise of ensuring the insulation electrical performance;

the cable shielding layer adopts a double shielding layer woven by an aluminum-plastic composite tape and a tinned copper wire, so that the anti-interference performance of the cable is improved;

the glass fiber yarns are coated with asphalt as a water-blocking layer, and the asphalt is wound outside the water-blocking tape, so that the radial water-blocking and power-on operation can be realized for a long time, the insulation resistance is not reduced, and the safety coefficient of the cable in the operation in water is high;

the sheath adopts ultraviolet-resistant polyethylene, so that the service life of the cable is prolonged, and the cable blocks water.

The above embodiments are only used for further explanation of the present invention, and it is not understood that the present invention is limited by the protection scope of the present invention, and the technical engineers in the field are right according to the above contents of the present invention.

Claims

1. The utility model provides a waterproof outdoor power cable, includes conductor (1), characterized by, conductor (1) cross section is semi-circular, and conductor (1) is equipped with crosslinked polyethylene insulation (2) outward, and the crosslinked polyethylene insulation (2) outside is equipped with shielding structure, and shielding structure is equipped with fine yarn weaving layer of glass (5) outward, and fine yarn weaving layer of glass (5) is equipped with asphalt coating (6) outward, and asphalt coating (6) are wrapped around outward and are had the area that blocks water.

2. A water-proof outdoor power supply cable according to claim 1, characterized in that the conductors (1) are symmetrically arranged within the power supply cable.

3. A water-resistant outdoor power supply cable according to claim 1 or 2, characterized in that the conductor (1) is formed by stranding a plurality of aluminum alloy wires, and the stranded conductor (1) is annealed.

4. The waterproof outdoor power cable as claimed in claim 3, wherein the aluminum alloy wire has an outer diameter of less than 0.5 mm.

5. The waterproof outdoor power cable as claimed in claim 4, wherein the aluminum alloy wire has an elongation at break of more than 10% and an elongation strength of more than 98 MPa.

6. A waterproof outdoor power supply cable according to claim 1, wherein the shielding structure is double-layered and includes an aluminum-plastic composite tape (3) and a tinned wire braided shield (4), the aluminum-plastic composite tape is disposed outside the cross-linked polyethylene insulation (2), the tinned wire braided shield (4) is disposed outside the aluminum-plastic composite tape (3), the braiding density of the tinned wire braided shield (4) is greater than 80%, and the braiding density of the glass fiber yarn braided layer (5) is greater than 60%.

7. A water-proof outdoor power supply cable as claimed in claim 1, wherein the asphalt coating (6) is wrapped with a water-blocking tape (7), and a uv-resistant polyethylene sheath (8) is arranged outside the water-blocking tape (7).

8. A water-proof outdoor power cable as claimed in claim 1, wherein a water-blocking filling (9) is provided between the cross-linked polyethylene insulation (2) and the aluminum-plastic composite tape (3).