CN2789891Y

CN2789891Y - Improved rubber insulation water resisting cable

Info

Publication number: CN2789891Y
Application number: CN 200420080953
Authority: CN
Inventors: 鲁建军; 彭小弟; 孙署光
Original assignee: YUANDONG CABLE FACTORY
Current assignee: Far East Cable Co Ltd
Priority date: 2004-11-04
Filing date: 2004-11-04
Publication date: 2006-06-21
Anticipated expiration: 2014-11-04

Abstract

The utility model relates to the improvement of a water-stopping cable, particularly the improvement of a water-stopping cable of rubber insulation. The utility model is characterized in that the surfaces of soft and thin single filaments for composing a stranded conductor are provided with adhesive and adhesive water-stopping powder to cause a water-stopping layer to be formed on the surface of each soft and thin single filament totally. Adhering powder of the soft and thin single filaments is simple, efficient and firm, each soft and thin single filament can also be ensured to be adhered with powder totally, powder leakage of the soft and thin single filaments can not be generated, and thus powder is totally adhered between stranding single filaments of a conductor, and the water-stopping performance of the stranded conductor is favorable. Even if an oversheath and a conductor insulating layer are broken, water still can be prevented from longitudinally flowing in the stranded conductor under high water pressure, and water-stopping techniques of external insulation are matched to cause the utility model to have excellent radial and longitudinal water-stopping performance. And secondly, the soft bending property of the composed cable is not influenced by the water-stopping measures, and the stranded conductor is not thickened. The utility model overcomes the shortages that the prior art is not suitable for adhering water-stopping materials of soft and thin single filaments, powder is hard to adhere and the powder is hard to totally adhere between the stranding single filaments of the conductor.

Description

A kind of improved rubber insulation cable that blocks water

Technical field

Utility model is about the improvement to the cable that blocks water, especially to the block water improvement of cable of rubber insulation.

Background technology

Usually blocking water of power cable is to adopt the design that vertically and radially blocks water outside insulated wire cores, promptly wrapping has waterstop outside stranded conductor, cable core is filled material water-proof material between the space, twisted cable core holds waterstop outward again, Chinese patent 01237930 described water-resistant power cable for example, layer at conductor has semiconductive water blocking layer, wrapped again or vertical bag waterstop outward with the interlayer wrapping; Chinese patent 200310108041 described insulative water-proof power cables, except that adopt the various measures that block water conductor, also the filling water-proofing powder is filled between stranded conductor and insulating barrier.This structure cable that blocks water can only terminate in water resistance outside the cable core usually, promptly radially block water, but because conductor is not taked the measure of blocking water, so water is as infiltrating from end conductor (as joint), and water will vertically move along the stranded conductor gap, does not vertically reach resistance effect.

Chinese patent 01237930 discloses a kind of high-voltage cross-linking polythene insulated power cable that blocks water entirely, wrapped or vertical bag semiconductor water blocking layer between the core part conductor layer, press by the normal circle of conductor again, make not have the gap between conductor layer, vertically block water to reach conductor.Chinese patent 01277820 disclosed all-round water-proof cross-linked cable, stranded conductor gap adopt water-proofing powder to fill, and block water to reach vertically.Chinese patent 02268407 disclosed water-proof cross-linked cable applies water blocking yarn between the heart yearn and first stranded layer in the employing, and filling water-proofing powder structure reaches vertically conductor and blocks water between other conductor single lines.Yet these cables are rigid structure mesohigh crosslinking insulated cable, and conductor is the thicker hard conductor in silk footpath, and the silk footpath is usually at 1.5-4mm, and radical is less, and the measure that blocks water (easy as attached powder) is relatively easy to be realized.Secondly, such cable only is applicable to fixedly and lays, and is not suitable for mobile occasion and uses.And the cabtyre cable that mobile occasion is used, the thin footpath of conductor is tiny, generally at 0.25-0.5mm, and matter is soft, radical is many again, generally Duos at least more than 5 times than the same specification crosslinking insulated cable, and water-proofing powder is filled difficulty, above-mentioned technology is difficult to directly apply to soft thin conductor, so the difficulty especially that blocks water of flexible cable.Besides, aforementioned filling water-proofing powder is difficult to guarantee between all monofilament promptly to be difficult to reach complete attached powder between the conductor monofilament all with water-proofing powder, especially very difficult especially for soft thin monofilament, even not possible, and therefore objective reality gap between stranded monofilament does not still reach the real requirement that blocks water entirely.And the flexible cable that uses in water under high pressure is for a long time explained as ship and use control cable, is protection cable lower end costliness electric equipment, has relatively high expectations to vertically blocking water.

Goal of the invention

The purpose of utility model is to overcome the deficiency of above-mentioned prior art, provide the vertical water preventing ability of a kind of conductor good by the stranded rubber insulation of the soft thin monofilament conductor cable that blocks water.

The utility model purpose realizes that main the improvement is to carry out in the soft thin monofilament surface that constitutes conductor adhesive is arranged, and adheres to water-proofing powder again, thereby make each soft thin monofilament surface form stable water blocking layer, and then restraint into strand, the stranded conductor that presses into reaches vertically conductor and blocks water.Specifically, the utility model rubber insulation cable that blocks water comprises the stranded conductor that presses of soft thin monofilament, the insulating barrier that conductor is outer, water blocking layer and outer rubber sheath is characterized in that said each soft thin monofilament surface has the water-proofing powder of adhesive and adhesion, makes each soft thin monofilament surface all be formed with water blocking layer.

The said soft thin monofilament of utility model comprises for example tin monofilament of plating metal on surface, reaches not plating monofilament of surface.Wherein, utility model is excellent to adopt the plating monofilament especially, the thin monofilament that metal is arranged is carried out in the surface plating, can improve the activity coefficient of stranded conductor when pressing in that conductor is stranded, activity coefficient can be brought up to about 90% by about 80%, the gap reduces between monofilament thereby make, and this vertically blocks water to the raising conductor is favourable.

The utility model rubber insulation cable that blocks water, owing to adopt in the soft thin monofilament surface of forming conductor and adhere to water-proofing powder by adhesive, make that not only the attached powder of soft thin monofilament is simple effective and attached powder is firm, and can guarantee all attached powder of energy of each monofilament, can not produce monofilament and leak powder, thereby can reach complete attached powder between the stranded monofilament of conductor, the stranded conductor block-water performance is good, even after oversheath and insulating layer of conductor breakage, under high hydraulic pressure, still can stop water vertically flowing in conductor, cooperate the external insulation technology that blocks water, make that cable has well radially, vertical block-water performance; Secondly, this measure that blocks water does not influence the soft bending property of forming cable, does not increase thick conductor.Utility model has overcome prior art and has not been suitable for the attached material water-proof material of soft thin monofilament, attached powder difficulty, and the deficiency that is difficult to reach complete attached powder between the stranded monofilament of conductor.Utility model more can be used for slightly, conductor blocks water firmly.

Below in conjunction with an embodiment, further specify utility model, but embodiment limits specifically to utility model.

Description of drawings

Fig. 1 is the thin monofilament cross section structure of a utility model embodiment schematic diagram.

Fig. 2 is the thin monofilament vertical structure of a utility model embodiment schematic diagram.

Fig. 3 is a utility model embodiment stranded conductor cross section structure schematic diagram.

Fig. 4 is a utility model embodiment cross-section of cable structural representation.

Embodiment

Embodiment: referring to accompanying drawing, the utility model rubber insulation cable that blocks water, being carried out by zinc-plated thin copper monofilament 1 surface bag has adhesive 2 and adheres to water-proofing powder 3, constitutes the thin monofilament that blocks water, and restraints into strand 4 then, and multiple strand is pressed into conductor 5, and its activity coefficient can reach about 90%.Conductor is extruded with ethylene-propylene rubber insulating barrier 6 outward and forms insulated wire cores, and the control core group 7 of thoroughly doing away with edge core and formation strand is twisted into cable core more, and block water between the cable core space and fill 8, outer wrapped waterstop 9, outermost layer extrudes chlorinated polyethylene rubber restrictive coating 10 outward.

The utility model cable can also be single cored structure.

Claims

1, a kind of rubber insulation cable that blocks water, comprise the stranded conductor that presses of soft thin monofilament, the insulating barrier that conductor is outer, water blocking layer and outer rubber sheath, it is characterized in that said each soft thin monofilament surface has the water-proofing powder of adhesive and adhesion, makes each soft thin monofilament surface all be formed with water blocking layer.

2, according to the described rubber insulation of claim 1 cable that blocks water, it is characterized in that said soft thin monofilament is the plating monofilament.

3, according to claim 1 or the 2 described rubber insulations cable that blocks water, it is characterized in that the activity coefficient of stranded conductor reaches 90%.