CN201741489U

CN201741489U - Cross-linked polyethylene insulated power cable for humid environment

Info

Publication number: CN201741489U
Application number: CN2009202523554U
Authority: CN
Inventors: 许志辉; 韩长武; 张世明; 苏顺利; 程国华
Original assignee: TIANJIN SULI CABLE GROUP CO Ltd
Current assignee: TIANJIN SULI CABLE GROUP CO Ltd
Priority date: 2009-12-30
Filing date: 2009-12-30
Publication date: 2011-02-09
Anticipated expiration: 2019-12-30

Abstract

The utility model relates to a cross-linked polyethylene insulated power cable for humid environment. The power cable comprises insulated cores which adopts a conductor as the core; the insulated cores adopt the structure that the outer surface of the conductor is clad by an inner shielding layer, an insulation layer, an outer shielding layer and a metal shielding layer in sequence; three insulated cores are adopted as a core, the outer surface is clad by a flame retardant belting layer, a longitudinal water blocking layer, an isolation layer, an armor layer and a sheathing layer in sequence; and the gap between the insulated cores and the flame retardant belting layer is filled with a flame retardant filler, therefore, the cable is made. The power cable is characterized in that the inner shielding layer and the outer shielding layer are made of water-tree-retardant semi-conductive materials, and the inner shielding layer, the insulation layer and the outer shielding layer are combined by adopting a triple extrusion method. The power cable has the advantages of environmental protection, waterproof property, flame retardance and long service life.

Description

The wet environment power cable with cross-linked polyethylene insulation

Technical field

The utility model belongs to the power cable technical field, particularly relates to the crosslinked polyetylene insulated fire-retardant water-resistant power cable that a kind of wet environment is used.

Background technology

At present, fast development along with national economy and power industry, each field increases day by day to the demand of power cable with cross-linked polyethylene insulation, some are also more and more higher to the instructions for use of power cable with cross-linked polyethylene insulation as the special area of coastal cities environment, not only need cable to have good insulation performance and anti-flammability, strict to the water resistance of cable simultaneously.The water resistance of the common fire-retardant electric power in the existing known technology is poor, cable is immersed in the water or works under wet environment for a long time, and hydrone is easy to form the water tree in the insulating barrier of cable, thereby causes the insulating barrier of cable breakdown, cause electric leakage, and the useful life of cable is short.In addition, the separator of common flame-proof power cable and restrictive coating adopt pvc material to make, and can emit a large amount of toxic gases when cable fire, as bioxin, human body are caused serious harm.

Summary of the invention

The utility model provides the wet environment power cable with cross-linked polyethylene insulation of good, safe, long with the life-span and the environmental protection of a kind of water preventing ability for solving the technical problem that exists in the known technology.

The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: a kind of wet environment power cable with cross-linked polyethylene insulation, comprise with the conductor being the insulated wire cores of core, the structure of insulated wire cores is that the outer surface at conductor is coated with internal shield successively, insulating barrier, outer shielding layer and metal screen layer, thoroughly doing away with the edge core by 3 is core, outer surface coats fire-retardant belting layer successively, vertical water blocking layer, separator, armour and restrictive coating, and place, the slit between insulated wire cores and the fire-retardant belting layer is filled with fire-retardant filler, with this stranding, it is characterized in that: described internal shield and outer shielding layer are that the semiconductive material of anti-water tree is made, and internal shield, insulating barrier and outer shielding layer adopt three-layer co-extruded mode combination.

The utility model can also adopt following technical scheme:

Described insulating barrier is made by the ultra-clean cross-linking polyethylene materials.

Described metal screen layer is that thickness is the copper strips layer of 0.12mm.

Described fire-retardant belting layer is the LSOH anti-flaming band, and the double-deck wrapped outside in insulated wire cores.

Described vertical water blocking layer is that thickness is the aluminium-plastic tape of 0.3mm.

Described separator and restrictive coating are made by the halogen-free and low-smoke flame-retardant polyolefin material.

Described armour is that 0.8mm, width are that double-deck the gap is wrapped forms for the steel band of 60mm by thickness.

Also be provided with fire-retardant band between described armour and the restrictive coating.

Advantage and the good effect that the utlity model has are: because the utility model adopts technique scheme, be that internal shield, insulating barrier and outer shielding layer adopt three-layer co-extruded mode combination, and internal shield and outer shielding layer are that the semiconductive material of anti-water tree is made, can improve the electrified performance of cable, thereby prolong the useful life of cable; Fire-retardant belting layer is the LSOH anti-flaming band, and double-deck wrapped in the outside of insulated wire cores, increases the fire retardancy of cable with this; Vertically water blocking layer is that thickness is that the copper of 0.3mm is moulded compound composite band, makes cable have good block-water performance; Separator and restrictive coating are made by the halogen-free and low-smoke flame-retardant polyolefin material, can play fire-retardant effect, and can not produce toxic gas, good environmental protection during cable fire; Armour is that 0.8mm, width are that double-deck the gap is wrapped forms for the steel band of 60mm by thickness, and also be provided with fire-retardant band between armour and the restrictive coating, can prevent effectively that mouse or other animals from biting cable and causing cable bad, fire-retardant band not only has fire-retardant effect, can also be with the slit that also reduces to form between steel band and the sheath, thereby reduce the interior shear stress of sheath, prevent the sheath cracking.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is the structural representation of the utility model embodiment 2.

Among the figure: 1, insulated wire cores; 1-1, conductor; 1-2, internal shield; 1-3, insulating barrier; 1-4, outer shielding layer; 1-5, metal screen layer; 2, fire-retardant belting layer; 3, vertical water blocking layer; 4, separator; 5, armour; 6, fire-retardant band; 7, restrictive coating; 8, fire-retardant filler.

Embodiment

For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:

Embodiment one

See also Fig. 1, a kind of wet environment power cable with cross-linked polyethylene insulation, comprise conductor 1-1, described conductor outer surface is coated with internal shield 1-2, insulating barrier 1-3, outer shielding layer 1-4 and metal screen layer 1-5 successively, constitute insulated wire cores 1 with this, internal shield 1-2, insulating barrier 1-3 and outer shielding layer 1-4 adopt three-layer co-extruded mode combination, and internal shield 1-2 and outer shielding layer 1-4 are made by the semiconductive material of anti-water tree.Thoroughly doing away with edge cable cores 1 with 3 is that the structure of three core power cables of core is: 3 thoroughly do away with edge cores 1 be twisted into core after, the outside is coated with fire-retardant belting layer 2, vertical water blocking layer 3, separator 4, armour 5, fire-retardant band 6 and restrictive coating 7 successively, and place, the slit between insulated wire cores 1 and the fire-retardant belting layer 2 is filled with the fire-retardant filler 8 of flame retardant type non-hygroscopic polypropylene material.In the said structure, the material of insulating barrier 1-3 is the ultra-clean crosslinked polyethylene, metal screen layer 1-5 is that thickness is the copper strips layer of 0.12mm, fire-retardant belting layer 2 is the LSOH anti-flaming band, and the double-deck wrapped outside in insulated wire cores 1, vertically water blocking layer 3 is that thickness is the aluminium-plastic tape of 0.3mm, the material of separator 4 and restrictive coating 7 all is halogen-free and low-smoke flame-retardant polyolefin materials, also vertically between armour 5 and the restrictive coating 7 be surrounded by fire-retardant band 6, and armour 5 is that thickness is that 0.8mm, width are that double-deck the gap is wrapped forms for the steel band of 60mm.

Embodiment two

As shown in Figure 2, thoroughly do away with the edge cable as core with one, after removing the fire-retardant filler 8 that is located between insulated wire cores 1 and the fire-retardant belting layer 2 from, other structures are identical with embodiment one described structure, can be twisted into single-core power cables, this single-core power cables has same advantage and good effect.

Claims

1. wet environment power cable with cross-linked polyethylene insulation, comprise with the conductor being the insulated wire cores of core, the structure of insulated wire cores is that the outer surface at conductor is coated with internal shield successively, insulating barrier, outer shielding layer and metal screen layer, thoroughly doing away with the edge core by 3 is core, outer surface coats fire-retardant belting layer successively, vertical water blocking layer, separator, armour and restrictive coating, and place, the slit between insulated wire cores and the fire-retardant belting layer is filled with fire-retardant filler, with this stranding, it is characterized in that: described internal shield and outer shielding layer are that the semiconductive material of anti-water tree is made, and internal shield, insulating barrier and outer shielding layer adopt three-layer co-extruded mode combination.

2. wet environment power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: described insulating barrier is made by the ultra-clean cross-linking polyethylene materials.

3. wet environment power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: described metal screen layer is that thickness is the copper strips layer of 0.12mm.

4. wet environment power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: described fire-retardant belting layer is the LSOH anti-flaming band, and the double-deck wrapped outside in insulated wire cores.

5. wet environment power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: described vertical water blocking layer is that thickness is the aluminium-plastic tape of 0.3mm.

6. wet environment power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: described separator and restrictive coating are made by the halogen-free and low-smoke flame-retardant polyolefin material.

7. wet environment power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: described armour is that 0.8mm, width are that double-deck the gap is wrapped forms for the steel band of 60mm by thickness.

8. wet environment power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: also be provided with fire-retardant band between described armour and the restrictive coating.