CN202487251U

CN202487251U - Waterproof high-voltage cable

Info

Publication number: CN202487251U
Application number: CN2012201124968U
Authority: CN
Inventors: 张博; 邓声华; 刘和平; 陈翠柳
Original assignee: GUANGZHOU LINGNAN CABLE CO Ltd
Current assignee: GUANGZHOU LINGNAN CABLE CO Ltd
Priority date: 2012-03-22
Filing date: 2012-03-22
Publication date: 2012-10-10
Anticipated expiration: 2022-03-22

Abstract

The utility model discloses a waterproof high-voltage cable which comprises a cable core and a cable core sheath for wrapping the cable core. The cable core comprises multiple conductors, and a fragile waterproof tape is wound on each conductor and comprises semiconductive fragile nonwoven and waterproof powder wrapped in the semiconductive fragile nonwoven. When pressure is applied to the cable core, the semiconductive fragile nonwoven is broken, and clearances among the conductors are filled with the waterproof powder. The cable core adopts the fragile waterproof tapes with the waterproof powder wrapped by the semiconductive fragile nonwoven, and the waterproof powder can fill the conductor clearances of the cable core, so that fine powder attaching effects are realized, and the waterproof high-voltage cable has optimal waterproof effects.

Description

A kind of high-tension cable that blocks water

Technical field

The utility model relates to the cable technology field, is specifically related to a kind of high-tension cable that blocks water.

Background technology

At present, mesolow field of cables, the mode of blocking water of existing cable structure have two kinds: a kind of is that static state blocks water, and a kind of is dynamically to block water.It generally is to fill some to refuse hydrate with the immersion of the passive form prevention of static state moisture content that static state blocks water; In process of production; Because the influence of the control instability of technology and the variation factors such as (expanding with heat and contract with cold) of environment for use makes and produces some little air gaps between water blocking layer and outer jacket or the core; Block-water effect is undesirable, and the cable cost of manufacture is high, weight is big, complex procedures.Dynamically the stop water material therefor is to contain to meet can expand the rapidly macromolecular compound of own vol several times even tens of times of water.This macromolecular compound is filled between slits such as conductor, core, core cover with forms such as water-proofing powder, water blocking yarn, common waterstop, waterproofing rope; Constitute the complete system that blocks water of a cover, the volume of itself is increased rapidly, fill institute and have living space; As clogging water pipe with stopper; Block water, prevent that moisture from continuing infiltration, reaches the purpose of protection cable.In dynamic stop water, with regard to the conductor part of core, when whole employing water-proofing powder,, attach the powder difficulty because of conductor core wire and strand are big with layer space, if attach powder, be prone to cause core insulation distortion by medium; When whole employing water blocking yarn, conductor diameter is increased and be prone to phenomenons such as hand pick, conductive surface are not bright and clean; When the common waterstop of whole employings, conductor diameter increases, and phenomenons such as electrical property instability occur.

High pressure, extra-high-tension cable field, because the particularity of product, the structure that the semi-conductive buffer water blocking layer vertically blocks water, metallic sheath vertically blocks water is adopted in the existing insulated wire cores outside.Can avoid insulation screen to influence the insulation property of cable and useful life like this because of touching water or making moist.In case but the damage of insulation shield layer, or the joint fault, water will infiltrate conductor inside, and a whole like this cable just can't use, because the unit price of high pressure, extra-high-tension cable is higher, loses all at hundreds of thousands even up to a million at every turn.

The technology that dynamically blocks water that a kind of core part adopts water-proofing powder, water blocking yarn to use with, publication number is disclosed in being the Chinese utility model patent file of CN2554774Y; Can solve core part only increases and hand pick with the conductor diameter that water blocking yarn produced; The problem that conductive surface is not bright and clean, but this water blocking yarn and water-proofing powder use with technology still can not make water-proofing powder good attached to conductive surface, and need be in manufacturing process with water-proofing powder attached to perhaps water-proofing powder being attached on the conductor on the water blocking yarn; But because the adhesiveness of water-proofing powder itself is not high; The unavoidable water-proofing powder that in attaching the process of powder, causes is unrestrained, possibly bring the water-proofing powder waste, and increase manufacture difficulty; And attach under the powder amount condition of limited at water blocking yarn, the block-water effect that it reached also is limited.

The utility model content

The utility model provides a kind of high-tension cable that blocks water, and can solve the existing cable that blocks water and adopt water blocking yarn and water-proofing powder to use the technological water-proofing powder that is brought with to attach the problem that powder is limited and block-water effect is limited.

The utility model provides a kind of high-tension cable that blocks water, and comprises the core cover of core and parcel core, and said core comprises many conductors; On conductor, twined frangible waterstop; Said frangible waterstop comprises frangible nonwoven fabrics of semiconductive and water-proofing powder, and parcel water-proofing powder in the frangible nonwoven fabrics of semiconductive is when core is under pressure; The frangible nonwoven fabrics of semiconductive is broken, the gap between water-proofing powder filling conductor.

Preferably, many conductors of said core constitute inner core, inferior inner core, inferior outer core and outer core from inside to outside respectively, and inner core, inferior inner core, inferior outer core and outer core wrap up by frangible waterstop.

Preferably, said core cover comprises the first semiconductive waterstop, conductor shield, insulating barrier, insulation screen, the second semiconductive waterstop, metallic sheath and oversheath from inside to outside.

Preferably, the skin at oversheath also comprises semi-conductive layer.

Preferably, said core is divided into a plurality of secter pats, comprises many conductors in each secter pat.

Preferably, the two-sided insulation crimped paper that blocks water of liner between per two secter pats.

Preferably, secter pat forms centre bore at the core center, and central hole location adds many water blocking yarns.

The core of the high-tension cable that blocks water that the utility model provides adopts frangible waterstop; Frangible waterstop is by the frangible nonwoven fabrics parcel of semiconductive water-proofing powder; Core is when being under pressure, and the frangible nonwoven fabrics of semiconductive is broken, and water-proofing powder is filled in the conductor gap of core; Realize the good powder effect of attaching, had best block-water effect.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the axial cross section sketch map of the core of the high-tension cable that blocks water that is not under pressure among the utility model embodiment 1;

Fig. 2 is the structural representation of high-tension cable of blocking water among the utility model embodiment 1;

Fig. 3 is the structural representation of the core of another high-tension cable that blocks water among the utility model embodiment 2.

Embodiment

To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making all other embodiment that obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

Embodiment 1:

The utility model embodiment provides a kind of high-tension cable that blocks water, and comprises the core cover of core and parcel core, and said core comprises many conductors; On conductor, twined frangible waterstop; Said frangible waterstop comprises frangible nonwoven fabrics of semiconductive and water-proofing powder, and parcel water-proofing powder in the frangible nonwoven fabrics of semiconductive is when core is under pressure; The frangible nonwoven fabrics of semiconductive is broken, the gap between water-proofing powder filling conductor.

Specifically as shown in Figure 1, said core is made up of many conductors 10, and conductor 10 constitutes inner core 11 from inside to outside respectively, inferior inner core 12, inferior outer core 13 and outer core 14; Inner core 11, inferior inner core 12, inferior outer core 13 and outer core 14 are by frangible waterstop 20 parcels; In the manufacturing process of core, can at first twine, constitute time inner core 12 with conductor again, continue then to twine time inner core 12 with frangible waterstop to the frangible waterstop of inner core 11 usefulness; Constitute time outer core 13 with conductor again, continue to twine time outer core 13, constitute outer core with conductor at last with frangible waterstop; Finally be wrapped on the outer core, so far formed the core that has wrapped up frangible waterstop with frangible waterstop.Tend to form a center conductor 101 at the center of inner core 11,, therefore on center conductor 101, still can twine the frangible waterstop 201 in center in order to guarantee inner core 11 inner no gaps.

Well also have the core cover in the outside of the core of frangible waterstop at parcel, specifically as shown in Figure 2, core 1 is by core 2 parcels; Core cover 2 comprises the first semiconductive waterstop 21 from inside to outside; Conductor shield 22, insulating barrier 23, insulation screen 24; The second semiconductive waterstop 25, metallic sheath 26 and oversheath 27; As a kind of improved procedure of the utility model embodiment, also comprise semi-conductive layer 28 at the skin of oversheath 27.

When 2 pairs of cores 1 of online core retainer plate wrapped up, core 1 was under pressure, and outer core, inferior outer core, inferior inner core, inner core all can shrink to the center of circle of core direction; Therefore frangible waterstop can receive (outer core and time outer core between two sandwich layers equally; Inferior outer core and time inner core, inferior inner core and inner core, outer core overlaps innermost layer with core) extruding; So frangible nonwoven fabrics 201 fragmentations of the semiconductive of frangible waterstop, the gap that water-proofing powder 202 filling conductors are 10.Because the conductor of outer core, inferior outer core, inferior inner core and inner core is all closely arranged; Therefore; Water-proofing powder can be stepped up can not leak outside between two sandwich layers; And also can adhere to water-proofing powder 202 on the broken frangible nonwoven fabrics 201 of semiconductive, guaranteed in the core water-proofing powder attach the powder amount, can realize the best for block-water effect.

Embodiment 2:

As shown in Figure 3, said core 1 is divided into a plurality of secter pats 31, belongs to a kind of multicore cable, comprises many conductors 10 in each secter pat 31.The two-sided insulation crimped paper 32 that blocks water of liner between per two secter pats.Secter pat 31 is formed centrally centre bore in core 1, central hole location adds many water blocking yarns 33.Conductor 10 in the secter pat 31 still adopts the mode in the foregoing description 1; The frangible waterstop of conductor 10 usefulness is twined, it is understandable that, the arrangement of conductor does not need layering among the utility model embodiment; Therefore; Frangible waterstop has multiple to the canoe of conductor, can only twine a conductor with a frangible waterstop and wrap up, and also can twine many conductors with a frangible waterstop and wrap up.

Core among the utility model embodiment still adopts the core cover in the foregoing description 1 to wrap up outward, and concrete core nested structure can repeat no more referring to the detailed introduction of in the foregoing description 1 the core cover being made here.

More than a kind of high-tension cable and preparation method thereof that blocks water that the utility model embodiment is provided carried out detailed introduction; Used concrete example among this paper the principle and the execution mode of the utility model are set forth, the explanation of above embodiment just is used to help to understand the core concept of the utility model; Simultaneously, for one of ordinary skill in the art, according to the thought of the utility model, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.

Claims

1. the high-tension cable that blocks water comprises core and the core cover that wraps up core, and it is characterized in that: said core comprises many conductors; On conductor, twined frangible waterstop; Said frangible waterstop comprises frangible nonwoven fabrics of semiconductive and water-proofing powder, and parcel water-proofing powder in the frangible nonwoven fabrics of semiconductive is when core is under pressure; The frangible nonwoven fabrics of semiconductive is broken, the gap between water-proofing powder filling conductor.

2. a kind of high-tension cable that blocks water as claimed in claim 1 is characterized in that: many conductors of said core constitute inner core, inferior inner core, inferior outer core and outer core from inside to outside respectively, and inner core, inferior inner core, inferior outer core and outer core wrap up by frangible waterstop.

3. according to claim 1 or claim 2 a kind of high-tension cable that blocks water, it is characterized in that: said core cover comprises the first semiconductive waterstop, conductor shield, insulating barrier, insulation screen, the second semiconductive waterstop, metallic sheath and oversheath from inside to outside.

4. a kind of high-tension cable that blocks water as claimed in claim 3 is characterized in that: the skin at oversheath also comprises semi-conductive layer.

5. a kind of high-tension cable that blocks water as claimed in claim 1, it is characterized in that: said core is divided into a plurality of secter pats, comprises many conductors in each secter pat.

6. a kind of high-tension cable that blocks water as claimed in claim 5 is characterized in that: the two-sided insulation crimped paper that blocks water of liner between per two secter pats.

7. like claim 5 or 6 described a kind of high-tension cables that block water, it is characterized in that: secter pat forms centre bore at the core center, central hole location adds many water blocking yarns.