CN2755741Y

CN2755741Y - High-voltage single-core power supply cable for digging ship

Info

Publication number: CN2755741Y
Application number: CN 200420109294
Authority: CN
Inventors: 胡建纲
Original assignee: DONGFENG CABLE FACTORY WUXI
Current assignee: DONGFENG CABLE FACTORY WUXI
Priority date: 2004-11-28
Filing date: 2004-11-28
Publication date: 2006-02-01
Anticipated expiration: 2014-11-28

Abstract

The utility model relates to the improvement of a high-voltage power supply cable for the digging ship of the arctic-alpine area, the highland and the salt lake and is characterized in that a conductor screen, cross-linked polyethylene, an insulation layer, an insulation screen, a copper belt lapping screen layer, a lapping water stopping belt, a binding belt, a stainless steel wire, an armor layer, another lapping water stopping belt and a rubber plastic composite material sheath are successively arranged outside a cable single-core conductor. Because of the inner and outer common enhancement, the mutual coordination causes the mechanical strength of the cable to be enhanced. An outer insulation double-layer water stopping layer enhances the water stopping performance of the cable, therefore the using requirement of the digging ship of the arctic-alpine area, the highland and the salt lake is met. The actual service life can reach two years, and the service life of the improvement of a high-voltage power supply cable is increased by 4-8 times compared with the original inlet cable.

Description

Digging ship high pressure single-core power cables

Technical field

Utility model relates to a kind of high voltage power cable, especially a kind of high and cold, plateau, salt lake digging ship high voltage power cable of being used for.

Background technology

Salt lake, plateau digging ship high pressure single-core power cables, because of its environment for use very abominable, as winter temperature reach subzero 40 ℃, bittern content is high in the air, thereby corrosivity is extremely strong, and operation ship offshore distance is far away, usually reach 1500-2000 rice, and the anxious wave of lake surface wind is high, cable is subjected to mechanicals efforts very big, the general high voltage cable is difficult to adapt to, and useful life is extremely short.Salt lake digging ship high pressure single-core power cables mostly adopts the import cable at present, its structure such as Fig. 1, and it is made up of single core conductor 1, rubber insulation 2, copper wire screen 3, band 4, rubber sheath 5.Yet the cable of this kind structure, in actual applications useful life shorter, generally only about 3-6 month.Reason is that cable does not have strengthening measure, can not bear strong mechanical external force, causes that cable very easily damages in the actual use; Secondly, a little less than the insulation sheath resistance to corrosion; The 3rd not anti-waterproof can cause moisture to infiltrate after the cable fault, because voltage cable grade height has moisture to infiltrate slightly, just can cause cable insulation to puncture, and can not repair use, can only scrap.Especially the impaired infiltration of cable can cause cable to puncture immediately, causes the sudden power accident, and damage equipment brings very big loss to production.Yet the construction of cable and the use occasion degree of association are bigger, because of use occasion, environmental requirement difference, do not have versatility.As homemade YJV32 power cable structure such as Fig. 2, comprise single core conductor 1, be followed successively by conductor shield 2 outward, crosslinked polyetylene insulated layer 3, insulation screen 4, copper strips lapped shielding layer 5, nonwoven fabrics 6, band 7, steel wire shuffling copper wire armour 8, PVC sheath 10.Yet exist PVC sheath water preventing ability poor equally, low temperature very easily ftractures, not acid and alkali-resistance; The ordinary steel wire armouring, not only intensity is low, corrosion-resistant, and need the mixing copper wire to be used for demagnetization; Because of no water blocking layer, after the cable failure, moisture infiltrates can destroy insulation property equally, and can not re-use after repairing, and therefore still can not satisfy this occasion instructions for use.

Summary of the invention

The utility model purpose is to overcome the deficiency of above-mentioned prior art, and a kind of withstand voltage height is provided, and mechanical strength is big, and insulation and antiseptic property are good, and water preventing ability is strong, can be by the digging ship that reparation re-uses high pressure single-core power cables.

For achieving the above object, utility model adopts on the construction of cable increases water blocking layer and machinery enhancing, and adopts insulation property and the good insulating material of rotproofness, uses thereby reach to satisfy in the salt lake, plateau.Specifically, utility model digging ship high pressure single-core power cables, comprise single core conductor and interior external insulation sheath, and metal screen layer, it is characterized in that said single core conductor is followed successively by conductor screen, crosslinked polyetylene insulated layer, insulation shielding, copper strips lapped shielding layer, wrapped waterstop, band, stainless steel wire armour, wrapped waterstop, composite rubber-plastic material sheath outward.

In addition, for coordinating the contradiction of cable pliability and intensity, reach both soft relatively, higher-strength is arranged again, the armouring stainless steel wire adopts than the filament footpath and increases the radical mode, and stainless steel wire directly is 1.1-1.3mm, and radical is the 60-80 root.

Utility model conductor edge layer adopts crosslinked polyethylene exhausted, good insulation preformance not only, and also netted stereochemical structure also helps improving tensile strength; The wrapped shielding of copper strips is keeping having improved cable machinery intensity greatly under the shielding properties prerequisite; Inside and outside wrapped waterstop respectively, strengthened radially and vertically water-resisting ability of cable greatly, sustain damage at cable even make, the existence of waterstop has effectively stoped the moisture infiltration, can make cable continue to use in 3-5 working day, can not cause immediately and wear, can avoid cable fault to cause unexpected power failure to have an accident and influence ordinary production, damage equipment, simultaneously, still can continue use after the cable insulation damage, prolong cable useful life greatly by repairing because no moisture infiltrates; The stainless steel wire armouring has not only increased cable intensity greatly, and the armour corrosion resistance and good, and thin silk footpath and many radicals have better been coordinated the relation of cable pliability and intensity; Oversheath adopts the rubber and plastic composite insulation material, has strengthened low temperature resistant winter resistance and corrosion resistance greatly, also has stronger water resistance simultaneously.Utility model is owing to adopt the above-mentioned inside and outside common structure that strengthens, the coordinative role that it is mutual, make the mechanical strength of cable improve greatly, composite rubber-plastic material external insulation and double-deck water blocking layer, the lower temperature resistance and the water preventing ability of cable have been improved greatly, can reach 2 years useful life, for the 4-8 of original cable doubly.

Below in conjunction with an embodiment, further specify utility model.

Description of drawings

Fig. 1 is an import construction of cable schematic diagram.

Fig. 2 is a YJV32 power cable structural representation.

Fig. 3 is a utility model construction of cable schematic diagram.

Embodiment

Embodiment: referring to Fig. 3, utility model digging ship high pressure single-core power cables, at single core copper conductor 1, be followed successively by conductor screen 2, crosslinked polyetylene insulated layer 3 outward, insulation shielding 4, wrapped copper strips screen 5, wrapped waterstop 6, belting layer 7, stainless steel wire armour 8, wrapped waterstop 9, composite rubber-plastic material oversheath 10.Wherein the stainless steel wire armour is that the 1.1-1.3mm braiding forms by 60-80 root, silk footpath.

Claims

1, a kind of digging ship high pressure single-core power cables, comprise single core conductor and interior external insulation sheath, and metal screen layer, it is characterized in that said single core conductor is followed successively by conductor screen, crosslinked polyetylene insulated layer, insulation shielding, copper strips lapped shielding layer, wrapped waterstop, band, stainless steel wire armour, wrapped waterstop, composite rubber-plastic material sheath outward.

2,, it is characterized in that said armouring stainless steel wire silk directly is 1.1-1.3mm according to the described digging ship of claim 1 high pressure single-core power cables.

3,, it is characterized in that said armouring stainless steel wire is by the 60-80 root according to claim 1 or 2 described digging ship high pressure single-core power cables.