CN210325319U

CN210325319U - 1kV crosslinked polyethylene insulated overhead insulated cable

Info

Publication number: CN210325319U
Application number: CN201920607060.8U
Authority: CN
Inventors: 周鹏; 骆志平
Original assignee: Wuxi Dengfeng Cable Co Ltd
Current assignee: Wuxi Dengfeng Cable Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-04-14
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses a 1kV crosslinked polyethylene insulation aerial insulated cable, including the aluminum alloy conductor at cable center, twine zinc-10% aluminium-tombarthite alloy cladding material steel wire earlier on the aluminum alloy conductor after again around a semiconduction internal shield band, crowded package crosslinked polyethylene insulating layer outside semiconduction internal shield band, around the fire-retardant compound area of blocking water outside crosslinked polyethylene insulating layer, establish the corrosion-resistant sliding sleeve of tetrafluoro resin through the viscose agent cover outside the fire-retardant compound area of blocking water. The utility model discloses have high water blocking nature, high fire-retardant, corrosion-resistant, high pliable and tough tensile, be applicable to various abominable environments.

Description

1kV crosslinked polyethylene insulated overhead insulated cable

Technical Field

The utility model relates to a wire and cable field specifically indicates a 1kV crosslinked polyethylene insulation aerial insulated cable.

Background

The selection of the span of the overhead insulated cable directly influences the engineering cost and the operation safety of the power transmission line, the engineering cost and the operation safety are in the problem of mutual restriction at present, although the overhead insulated cable is widely applied, the problems of short span distance, low safety, engineering cost and the like are increasingly prominent recently, and the high attention of the power department is attracted.

The overhead insulated cable national standard has been established in China, the structural form and the technical requirement of a pure aluminum core overhead insulated cable are only specified in the standard, the pure aluminum core overhead insulated cable can not meet the laying requirements of large span, flexibility and corrosion resistance far away, when the situation that river blocking or short distance setting is difficult to occur, the bending radius is small and the environment is severe is met, the cable laying is also provided with the strength requirement of an external steel strand for supporting the cable, by adopting the form, the engineering cost can be obviously improved, and the wire clamp and the overhead insulated cable have certain friction, so that the service life of the cable and the safe operation of a line are directly influenced. The overhead cable is exposed to a severe environment for a long time and is often corroded, so that the performance of the cable is affected; the water resistance and the flame retardance of the existing cable are poor; the high-flexibility tensile corrosion-resistant aluminum alloy overhead insulated cable can be a substitute product of the high-flexibility tensile corrosion-resistant aluminum alloy overhead insulated cable, and the high-flexibility tensile corrosion-resistant aluminum alloy overhead insulated cable can enlarge a crossing point in conventional engineering, so that the engineering cost is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the current technical problem, providing a 1kV crosslinked polyethylene insulated overhead insulated cable with high water resistance, high fire-retardant, corrosion-resistant, high pliable and tough tensile.

A1 kV crosslinked polyethylene insulation aerial insulated cable, including the aluminum alloy conductor at cable center, twine zinc-10% aluminium-tombarthite alloy cladding material steel wire earlier on the aluminum alloy conductor after again around a semiconduction internal shield band, crowded package crosslinked polyethylene insulating layer outside semiconduction internal shield band, wrap the fire-retardant compound area of blocking water outside crosslinked polyethylene insulating layer, establish the corrosion-resistant sliding sleeve of tetrafluoro resin through the viscose agent cover outside the fire-retardant compound area of blocking water.

Preferably, the aluminum alloy conductor is formed by twisting high-strength aluminum alloy wires.

Preferably, the overlapping rate of the zinc-10% aluminum-rare earth alloy coating steel wire is not less than 85%.

Preferably, the water-blocking flame-retardant composite tape is woven by a semiconductive buffering water-blocking tape and an alkali-free glass fiber tape.

Preferably, the thickness of the semi-conductive inner shielding tape is 2mm-4 mm.

Preferably, the thickness of the crosslinked polyethylene insulating layer is 3mm-4 mm.

Preferably, the thickness of the water-blocking flame-retardant composite tape is not more than 5 mm.

The beneficial effects of the utility model reside in that:

1. large span: the cable conductor adopts high-strength aluminum alloy, so that the integral breaking force is improved by 40%;

2. the dead weight is light: the aluminum alloy conductor reduces the outer diameter through high compression, and compared with the common overhead cable, the total insulation is reduced by 15% on the premise of not reducing the insulation performance, so that the dead weight of the cable is reduced;

3. the zinc-10% aluminum-rare earth alloy coating steel wire is wound on the aluminum alloy conductor, so that the corrosion resistance of the conductor is greatly improved, the corrosion resistance of the coated steel wire is 3-8 times higher than that of the galvanized steel wire, the service life of the steel wire is longer than that of the aluminum wire, the service life of the whole cable is prolonged, and the service life is prolonged to 60 years from 40 years before.

4. And the waterproof and flame-retardant composite tape is adopted, so that the cable has both a fireproof function and a waterproof function.

5. The outmost tetrafluoro resin sliding sleeve that is equipped with of cable for the cable: has extremely high impact resistance: the PTFE sliding sleeve can deform under impact, absorb the kinetic energy of particles, and then transmit most of the energy back to the particles in a rebound mode, so that the impact force is reduced, and the service life is greatly prolonged; has excellent wear resistance: the tetrafluoro resin sliding sleeve can be selected according to the wear-resistant requirement, and is suitable for the environment with large wear; the corrosion resistance is good: the tetrafluoro resin sliding sleeve can be formulated according to the corrosion prevention requirement, is suitable for the environment with high corrosivity, and the tetrafluoro resin lining can resist the corrosion of various acids, alkalis, salts, organic matters, seawater, sewage and the like, and can be used in a complex and harsh chemical corrosion environment; the temperature application range is wide: the tetrafluoro resin can be in the range of-40 degrees to +140 degrees.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the aluminum alloy conductor of the present invention wound with a zinc-10% aluminum-rare earth alloy coated steel wire;

fig. 3 is a schematic structural view of the semiconductive buffer water-blocking tape.

The specific implementation mode is as follows:

as shown in fig. 1-2, the 1kV crosslinked polyethylene insulated overhead insulated cable of the present invention comprises an aluminum alloy conductor 1 at the center of the cable, wherein the aluminum alloy conductor is formed by twisting high-strength aluminum alloy wires, the overall breaking force is improved by 40%, a large span is realized, the aluminum alloy conductor reduces the outer diameter by high compression, and the total insulation is compared with the common overhead cable, and the total insulation is reduced by 15% without reducing the insulation performance, thereby reducing the dead weight of the cable; firstly winding a zinc-10% aluminum-rare earth alloy coating steel wire 2 with the diameter of 1.25mm-1.5mm on an aluminum alloy conductor, then winding a semiconductive inner shielding wrapping tape 3 with the thickness of 2mm-4mm, extruding a crosslinked polyethylene insulating layer 4 with the thickness of 3mm-4mm outside the semiconductive inner shielding wrapping tape, and winding a water-blocking flame-retardant composite tape 5 outside the crosslinked polyethylene insulating layer, wherein the water-blocking flame-retardant composite tape is woven by a semiconductive buffering water-blocking tape and an alkali-free glass fiber tape, so that the cable has both a fireproof function and a waterproof function, and the thickness of the cable is not more than 5 mm; the polytetrafluoroethylene resin corrosion-resistant sliding sleeve 6 is sleeved outside the water-blocking flame-retardant composite belt through an adhesive, the polytetrafluoroethylene resin sliding sleeve can deform under impact, the kinetic energy of particles is absorbed, most energy is transmitted back to the particles in a rebound mode, the impact force is reduced, and the service life is greatly prolonged; the wear-resistant rubber can be selected according to the wear-resistant requirement, and is suitable for the environment with large wear; the formula can be prepared according to the corrosion prevention requirement, the environment with high corrosivity is suitable, the tetrafluoro resin lining can resist the corrosion of various acids, alkalis, salts, organic matters, seawater, sewage and the like, and the lining can be used in a complex and harsh chemical corrosion environment; the temperature application range is wide: the tetrafluoro resin can be in the range of-40 degrees to +140 degrees.

As shown in fig. 3, the semiconductive buffering water-blocking tape comprises a conductive polyester fiber non-woven fabric 7 and semiconductive bulked cotton 8, wherein a high-speed expansion water-absorbing resin 10 is bonded between the conductive polyester fiber non-woven fabric and the semiconductive bulked cotton through a semiconductive adhesive 9, and the semiconductive buffering water-blocking tape not only has a semiconductive property, but also has a buffering cushion function and a water-blocking function, so that the water-blocking performance of the cable is enhanced.

The utility model provides a 1kV crosslinked polyethylene insulation aerial insulated cable structural style and implementation method, it is above only the utility model discloses a preferred implementation method should point out, to the ordinary technical personnel of this technical field, not deviating from the utility model discloses under the prerequisite of principle, can also make a plurality of improvements, these improvements should also be regarded as the utility model discloses a protection scope.

Claims

1. The utility model provides an insulating overhead insulated cable of 1kV crosslinked polyethylene which characterized in that: the cable comprises an aluminum alloy conductor at the center of the cable, wherein a zinc-10% aluminum-rare earth alloy coating steel wire is wound on the aluminum alloy conductor, then a semiconductive inner shielding wrapping tape is wound on the aluminum alloy conductor, a crosslinked polyethylene insulating layer is extruded outside the semiconductive inner shielding wrapping tape, a water-blocking flame-retardant composite tape is wound outside the crosslinked polyethylene insulating layer, and a tetrafluoroethylene corrosion-resistant sliding sleeve is sleeved outside the water-blocking flame-retardant composite tape through an adhesive.

2. The 1kV crosslinked polyethylene insulated overhead insulated cable according to claim 1, wherein: the aluminum alloy conductor is formed by twisting high-strength aluminum alloy wires.

3. The 1kV crosslinked polyethylene insulated overhead insulated cable according to claim 1, wherein: the overlapping rate of the zinc-10% aluminum-rare earth alloy coating steel wire is not lower than 85%.

4. The 1kV crosslinked polyethylene insulated overhead insulated cable according to claim 1, wherein: the water-blocking flame-retardant composite belt is woven by a semiconductive buffering water-blocking belt and an alkali-free glass fiber belt.

5. The 1kV crosslinked polyethylene insulated overhead insulated cable according to claim 1, wherein: the thickness of the semi-conductive inner shielding wrapping tape is 2mm-4 mm.

6. The 1kV crosslinked polyethylene insulated overhead insulated cable according to claim 1, wherein: the thickness of the crosslinked polyethylene insulating layer is 3mm-4 mm.

7. The 1kV crosslinked polyethylene insulated overhead insulated cable according to claim 1, wherein: the thickness of the water-blocking flame-retardant composite tape is not more than 5 mm.

8. The 1kV crosslinked polyethylene insulated overhead insulated cable according to claim 4, wherein: the semiconductive buffering water-blocking tape comprises conductive polyester fiber non-manufactured cloth and semiconductive bulked cotton, and high-speed expansion water-absorbing resin is bonded between the conductive polyester fiber non-manufactured cloth and the semiconductive bulked cotton through a semiconductive adhesive.