CN219122982U

CN219122982U - Power cable for floating photovoltaic power station on water of 35kV and below

Info

Publication number: CN219122982U
Application number: CN202320267766.0U
Authority: CN
Inventors: 陶天宝; 李业胜; 何晶晶; 王敏; 鲁男子; 张生; 陶涛
Original assignee: Anhui Huatong Cable Group Co Ltd
Current assignee: Anhui Huatong Cable Group Co Ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-06-02
Anticipated expiration: 2033-02-21

Abstract

The utility model discloses a power cable for a photovoltaic power station floating on water of 35kV or below, which comprises a conductor, wherein a three-layer co-extrusion insulating layer is coated outside the conductor, a copper strip shielding layer is overlapped and wrapped outside the three-layer co-extrusion insulating layer to form a wire core, a plurality of wire cores are twisted into a cable, a water blocking filling strip is filled into a round shape, a water blocking strip wrapping layer is adopted outside the cable core to tie the cable core, a water blocking strip wrapping layer is adopted to sequentially squeeze a waterproof PVC inner protective layer, a flat steel wire armor layer is wrapped outside the water blocking strip wrapping layer, a flame retardant strip wrapping layer and an aluminum strip longitudinal wrapping water blocking layer are sequentially wrapped, and a low-smoke halogen-free flame retardant polyolefin outer sheath is wrapped outside the aluminum strip longitudinal wrapping water blocking layer. The power cable for the photovoltaic power station floating on water of 35kV or below has the characteristics of excellent halogen-free flame retardance, ultraviolet resistance, ozone corrosion resistance and the like, has excellent waterproof performance, and can meet the special use environment of the photovoltaic project on water.

Description

Power cable for floating photovoltaic power station on water of 35kV and below

Technical Field

The utility model relates to the technical field of cables, in particular to a power cable for a floating photovoltaic power station on water of 35kV or below.

Background

Unlike traditional ground photovoltaic power stations, water photovoltaic power stations have the advantages of no occupation of land resources, high power generation efficiency, convenient and fast assembly cleaning, high management flexibility of the power stations, high cost benefit, water resource protection and the like, and have been widely popularized and applied. Compared with the traditional photovoltaic cable, the cable for the water photovoltaic power station matched with the cable is higher in requirement, and because the cable is often exposed to sunlight or immersed in water, the cable is subjected to high temperature and ultraviolet radiation for a long time, and the outdoor laying environment is bad, the cable has the characteristics of ultraviolet resistance, ozone, severe temperature change, chemical corrosion and the like, and also has excellent waterproof performance. The prior art cable does not meet the above functions well. The utility model designs the power cable for the photovoltaic power station floating on water of 35kV or below according to the special requirements of the use place.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a power cable for a floating photovoltaic power station on water of 35kV or below.

The utility model is realized by the following technical scheme:

the utility model provides a power cable for showy photovoltaic power plant on water of 35kV and below, includes the conductor the cladding has three-layer crowded insulating layer altogether outside the conductor, and the overlapping of three-layer crowded insulating layer outside layer is wrapped copper strips shielding layer and is constituteed the sinle silk, twists into the cable with a plurality of sinle silk, adopts the packing that blocks water to fill into circularly, adopts the water blocking tape to wrap up first cable core around wrapping, and the water blocking tape wraps up first outside and wraps up waterproof PVC inner sheath, winding flat steel wire armor, wraps up water blocking tape again in proper order around wrapping up second, fire-retardant area wraps up layer and aluminium strip and indulges the water blocking layer, wraps up the fire-retardant polyolefin oversheath of low smoke and zero halogen in the aluminium strip indulges the water blocking layer outside cladding.

The conductor adopts a copper core conductor or an aluminum alloy conductor.

The three-layer co-extrusion insulating layer sequentially comprises an inner semi-conductive shielding layer, a crosslinked polyethylene insulating layer and an outer semi-conductive shielding layer.

The utility model has the advantages that: the power cable for the photovoltaic power station floating on water of 35kV or below has the characteristics of excellent halogen-free flame retardance, ultraviolet resistance, ozone corrosion resistance and the like, has excellent waterproof performance, and can meet the special use environment of the photovoltaic project on water.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Description of the embodiments

As shown in fig. 1, the power cable for the photovoltaic power station floating on water of 35kV or below comprises a copper core conductor or an aluminum alloy conductor 1, wherein three layers of co-extrusion insulating layers are coated outside the conductor 1, and each three layers of co-extrusion insulating layers sequentially comprises an inner semiconductive shielding layer 2, a crosslinked polyethylene insulating layer 3 and an outer semiconductive shielding layer 4. The cable core is formed by overlapping and wrapping copper strip shielding layers 5 on the outer layers of three co-extrusion insulating layers, a plurality of cable cores are twisted into a cable, a water blocking filling strip 6 is adopted to fill the cable into a round shape, the cable core is tightly tied by adopting a water blocking tape wrapping layer I7, a waterproof PVC inner protective layer 8, a flat steel wire armor layer 9 and a water blocking tape wrapping layer II are sequentially extruded and wrapped outside the water blocking tape wrapping layer I7, a fire blocking tape wrapping layer 11 and an aluminum tape longitudinal wrapping waterproof layer 12 are sequentially wrapped, and a low-smoke halogen-free flame retardant polyolefin outer sheath 13 is wrapped outside the aluminum tape longitudinal wrapping waterproof layer 12.

The cable disclosed by the utility model adopts a copper core or aluminum alloy conductor, is insulated by three layers of coextrusion, comprises an inner semiconductive shielding layer, a crosslinked polyethylene insulating layer and an outer semiconductive shielding layer, and the copper belt shielding layer is overlapped and wrapped on the outer layer, so that the cable meets the voltage grade requirement of a use environment. The cable cores are twisted into the cable, the water-blocking filling strips are used for filling round, the cable cores are tightly tied by the wrapping water-blocking strips, the water-blocking filling strips and the water-blocking strips can play a role in longitudinal water prevention, and once water is perceived, the cable cores expand rapidly to fill gaps, so that the water is prevented from further diffusing along the longitudinal direction of the electric wire. The waterproof strip is wrapped around the outer crowded waterproof PVC inner sheath of covering, twines flat steel wire armor, and waterproof PVC inner sheath plays radial waterproof effect, plays the guard action to cable inner structure simultaneously, prevents the damage that receives the armor. The armor layer is wrapped with the water blocking tape to prevent moisture from entering the armor layer and from being corroded by the moisture for a long time, so that the armor layer is oxidized and corroded. And wrapping the flame-retardant belt, wherein the flame-retardant belt is an environment-friendly glass fiber flame-retardant belt, is prepared by dip-coating a flame-retardant mixture solution which does not contain any halogen (such as chlorine and bromine) and is provided with an efficient inorganic flame retardant through processes such as dipping and curing, and plays roles in absorbing heat and isolating oxygen, and can effectively protect the inner layer of the cable when a fire occurs. The aluminum-plastic composite tape for external use is longitudinally wrapped around the wrapping layer to form a metal waterproof layer, so that the cable has good waterproof and dampproof performances; the outer sheath is made of a low-smoke halogen-free flame-retardant polyolefin material added with a rodenticide and an anti-aging agent, and the material has the properties of rodenticide and ultraviolet resistance besides halogen-free flame retardance, and is particularly suitable for a water floating photovoltaic power station.

Claims

1. The utility model provides a 35kV and below showy power cable for photovoltaic power plant on water which characterized in that: the cable comprises a conductor, wherein three layers of co-extrusion insulating layers are coated outside the conductor, a copper strip shielding layer is overlapped and wrapped outside the three layers of co-extrusion insulating layers to form a cable core, a plurality of cable cores are twisted into a cable, a water blocking filling strip is used for filling the cable into a round shape, the cable core is tightly tied outside the cable core by adopting a water blocking strip wrapping layer I, a waterproof PVC inner protective layer, a flat steel wire armor layer and a water blocking strip wrapping layer II are sequentially extruded and wrapped outside the water blocking strip wrapping layer I, a flame retardant strip wrapping layer and an aluminum strip longitudinal wrapping waterproof layer are sequentially wrapped, and a low-smoke halogen-free flame retardant polyolefin outer sheath is wrapped outside the aluminum strip longitudinal wrapping waterproof layer.

2. The power cable for a floating photovoltaic power station on water of 35kV and below according to claim 1, wherein: the conductor adopts a copper core conductor or an aluminum alloy conductor.

3. The power cable for a floating photovoltaic power station on water of 35kV and below according to claim 1, wherein: the three-layer co-extrusion insulating layer sequentially comprises an inner semi-conductive shielding layer, a crosslinked polyethylene insulating layer and an outer semi-conductive shielding layer.