CN202694974U - Waterproof water-tree-retardant medium voltage cross-linked three-core cable - Google Patents
Waterproof water-tree-retardant medium voltage cross-linked three-core cable Download PDFInfo
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- CN202694974U CN202694974U CN 201220355052 CN201220355052U CN202694974U CN 202694974 U CN202694974 U CN 202694974U CN 201220355052 CN201220355052 CN 201220355052 CN 201220355052 U CN201220355052 U CN 201220355052U CN 202694974 U CN202694974 U CN 202694974U
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Abstract
The utility model discloses a waterproof water-tree-retardant medium voltage cross-linked three-core cable. The waterproof water-tree-retardant medium voltage cross-linked three-core cable is characterized in that each water-blocking conductor is formed by jointly twisting a plurality of soft copper wires and water-blocking spun yarns, and three layers on each water-blocking conductor are co-extruded to sequentially form a conductor shielding layer, a water-tree-retardant cross-linked polyethylene insulation layer and an insulation shielding layer from inside to outside; an overlap wrapped semi-conductive water-blocking tape layer and a copper tape layer are sequentially arranged on each insulation shielding layer from inside to outside to form an insulation wire core; the three insulation wire cores and a filling layer are jointly twisted to form a cable, and a water-blocking tape layer is further wrapped to form a cable core; and a longitudinal wrapping aluminum-plastic tape layer, an inner sheath layer formed by extrusion of PE (polyethylene) plastic, a metal armor layer and an outer sheath layer formed by extrusion of the PE plastic are sequentially arranged on the cable core from inside to outside. The waterproof water-tree-retardant medium voltage cross-linked three-core cable disclosed by the utility model has the characteristics of watertightness, capability of preventing mechanical external force extrusion, corrosion resistance, long service life and the like.
Description
Technical field
The utility model relates to a kind of middle pressure crosslinked cable, relates in particular in the anti-water tree of a kind of water proof type and presses crosslinked three-core cable, belongs to technical field of electric wires and cables.
Background technology
Press the middle pressure crosslinked polyethylene XLPE insulated power cable of power transmission and transformation system extensive application all in underground operation among 6～35 kV, As time goes on, extraneous moisture can be penetrated into gradually in the insulation of cable and grow Cheng Shuishu, As time goes on continued growth of water tree meeting, finally cause insulation breakdown, become the major reason of cable early damage.
Cross-linking polyethylene materials has superior electrical property and mechanical performance, easily processing characteristics and very low price make it the preferred material made at middle pressure, high pressure and extra-high-tension cable.But it issues the unboiled water tree and causes cable breakdown at steam and highfield, has greatly affected security of operation and the useful life of cable.
Along with the harmfulness of crosslinked cable water tree progressively is familiar with by cable user, increasing customer requirements cable has anti-water tree function, and anti-water tree crosslinked cable is the main trend of cable industry development.
The crosslinked cable of pressure and above easily produces the water tree problem in the solution, will solve exactly the problem that reduces or stop to exist moisture content in the cable conductor with insulating barrier outward, will consider simultaneously the chance that common crosslinked polyethylene material itself exists generation water to set.Particularly three-core cable is more much bigger than single-core cable design, manufacture difficulty.
The disclosed Water-proof medium voltage interlink cable of Chinese patent ZL97247583.4, its structure can only play the radial water-resisting effect, can not solve longitudinal water-blocking, and " water tree " problem of insulating material itself generation.
The disclosed water-blocking and water-risistance power cable of Chinese patent ZL200420062458.1, its conductor gap-fill waterproofing admixture and apply preservative oil at conductive surface, complex process, the drawback such as production efficiency is low, and the production scene is very dirty and messy.The water tree problem of simultaneously insulating material generation itself is not resolved yet.
The disclosed anti-water tree power cable with cross-linked polyethylene insulation that entirely blocks water of Chinese patent ZL200720021040.X, its water-blocking conductor principle is to adopt at the stranded between layers overlapping lapped insulation waterstop of single metal wire, but this technique conductor production difficulty is large, if adopt the informal stranded then space between conductor still very large, the existence of air can be brought a large amount of steam into, and block-water effect is undesirable.
The disclosed anti-water tree of Chinese patent ZL200920079116.3 crosslinked cable, its insulating barrier has adopted the PE Insulation Material, and it does not belong to crosslinked cable, and what relate to is the low-voltage cable.
Summary of the invention
The utility model is for avoiding the existing weak point of above-mentioned prior art, provides in a kind of anti-water tree of water proof type with excellent water resistance and presses crosslinked three-core cable.
The utility model is that the technical solution problem adopts following technical scheme:
Press the design feature of crosslinked three-core cable to be in the anti-water of the utility model water proof type tree: to consist of water-blocking conductor, three-layer co-extruded conductor shield, the crosslinked polyetylene insulated layer of anti-water tree type and the insulation screen of forming successively from inside to outside on water-blocking conductor by many soft copper silks and the spun yarn that blocks water are common stranded; On described insulation screen, set gradually from inside to outside overlapping wrapped semiconductive water blocking tape layer and copper strips layer and form insulated wire cores; Three thoroughly do away with edge core and the common twisted synthesizing cable of packed layer and wrapped water blocking tape layer consists of cable core; Set gradually from inside to outside on described cable core that vertical alclad is moulded belt, extruded inner restrictive coating that the PE plastics form, metal armouring layer and extruded the external sheath layer that forms by the PE plastics; Described water-blocking conductor adopts regular lay configuration, and the conductor compacting coefficient is not less than 0.9; Described packed layer is to be combined with waterproof paste with waterproofing rope.
Press the design feature of crosslinked three-core cable also to be in the anti-water tree of the utility model water proof type:
Described vertical alclad is moulded the two-sided PE film composite aluminium plastic band that belt is thickness 0.15-0.35mm.
Described metal armouring layer is steel band, stainless steel band, steel wire, stainless steel wire, aluminum alloy strip or aluminum-alloy wire armour.
Described external sheath layer is as material take weatherability linear polyethylene plastics LLPE or high density polyethylene.
Compared with the prior art, the utility model beneficial effect is embodied in:
1, considered the relation of block-water effect and processing in the utility model, adopt many soft copper silks block water the regular lay configuration of spun yarn, press and pull out technique, less than the gap in the informal stranded technique conductor, adopted simultaneously the high coefficient that presses, the conductor block-water effect is good, reduced in the conductor because introducing moisture content with air, its processing is simple, easy to control; Packed layer adopts waterproofing rope and waterproof paste to be used, and waterproof effect is better;
2, insulating barrier adopts anti-water tree type crosslinked polyethylene TR-XLPE in the utility model, can prevent effectively that extraneous moisture penetration from growing the water tree in the cable insulation;
3, in the utility model radially waterproofing design adopted vertical bag aluminum plastic belt, it is two-sided PE film composite aluminium plastic band, vertical bag is put up face can be fine bonding, simultaneously aluminum layer thickness reaches 0.14-0.34mm, waterproof effect is fabulous, and is easy to process;
4, armour is metal tape or wire in the utility model, makes cable obtain good mechanical protection, and the weight of energy load-bearing cable satisfies the environment that cable uses under the corresponding conditions;
5, external sheath layer adopts weather-proof linear polyethylene to mould LLPE or the high density polyethylene material extrudes in the utility model, and the waterproof of material own, anticorrosive property are good, easily processing, and material is easy to get, and has reduced manufacturing cost.
Description of drawings
Fig. 1 is the utility model three-hole construction of cable schematic diagram.
Number in the figure: 1 water-blocking conductor, 2 conductor shields, 3 insulating barriers, 4 insulation screens, 5 semiconductive water blocking tape layers, 6 copper strips layers; 7 packed layers, 8 water blocking tape layers, 9 plastic-aluminum belts, 10 inner restrictive coatings, 11 metal armouring layers, 12 external sheath layers.
Embodiment
Referring to Fig. 1, press the structure of crosslinked three-core cable to be set in the anti-water tree of water proof type in the present embodiment:
By many soft copper silks and the common stranded water-blocking conductor 1 that consists of of the spun yarn that blocks water, three-layer co-extruded conductor shield 2, the crosslinked polyetylene insulated layer 3 of anti-water tree type and the insulation screen 4 of forming successively from inside to outside on water-blocking conductor 1; On insulation screen 4, set gradually from inside to outside overlapping wrapped semiconductive water blocking tape layer 5 and copper strips layer 6 formation insulated wire cores; Three thoroughly do away with edge core and packed layer 7 common twisted synthesizing cables and wrapped water blocking tape layer 8 consists of cable core; Set gradually from inside to outside on cable core that vertical alclad is moulded belt 9, extruded inner restrictive coating 10 that the PE plastics form, metal armouring layer 11 and extruded the external sheath layer 12 that forms by the PE plastics; Water-blocking conductor 1 adopts regular lay configuration, and the conductor compacting coefficient is not less than 0.9; Packed layer 7 is to be combined with waterproof paste with waterproofing rope.
In the implementation, vertical alclad is moulded the two-sided PE film composite aluminium plastic band that belt 9 is thickness 0.15-0.35mm, and aluminum layer thickness wherein reaches 0.14-0.34mm; Metal armouring layer 11 is steel band, stainless steel band, steel wire, stainless steel wire, aluminum alloy strip or aluminum-alloy wire armour; External sheath layer 12 is as material take weatherability linear polyethylene plastics LLPE or high density polyethylene; Soft copper silk in the water-blocking conductor also can be aluminium wire.
Claims (4)
1. press crosslinked three-core cable in the anti-water tree of water proof type, it is characterized in that by many soft copper silks and the common stranded water-blocking conductor (1) that consists of of the spun yarn that blocks water, at upper three-layer co-extruded conductor shield (2), the crosslinked polyetylene insulated layer of anti-water tree type (3) and the insulation screen (4) of forming successively from inside to outside of described water-blocking conductor (1); On described insulation screen (4), set gradually from inside to outside overlapping wrapped semiconductive water blocking tape layer (5) and copper strips layer (6) and form insulated wire cores; Three thoroughly do away with edge core and the common twisted synthesizing cable of packed layer (7) and wrapped water blocking tape layer (8) consists of cable core; Set gradually from inside to outside on described cable core that vertical alclad is moulded belt (9), extruded inner restrictive coating (10) that the PE plastics form, metal armouring layer (11) and extruded the external sheath layer (12) that forms by the PE plastics; Described water-blocking conductor (1) adopts regular lay configuration, and the conductor compacting coefficient is not less than 0.9; Described packed layer (7) is to be combined with waterproof paste with waterproofing rope.
2. press crosslinked three-core cable in the anti-water of the water proof type according to claim 1 tree, it is characterized in that described vertical alclad moulds the two-sided PE film composite aluminium plastic band that belt (9) is thickness 0.15-0.35mm.
3. press crosslinked three-core cable in the anti-water tree of water proof type according to claim 1, it is characterized in that described metal armouring layer (11) is steel band, stainless steel band, steel wire, stainless steel wire, aluminum alloy strip or aluminum-alloy wire armour.
4. press crosslinked three-core cable in the anti-water of the water proof type according to claim 1 tree, it is characterized in that described external sheath layer (12) is as material take weatherability linear polyethylene plastics LLPE or high density polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220355052 CN202694974U (en) | 2012-07-20 | 2012-07-20 | Waterproof water-tree-retardant medium voltage cross-linked three-core cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220355052 CN202694974U (en) | 2012-07-20 | 2012-07-20 | Waterproof water-tree-retardant medium voltage cross-linked three-core cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202694974U true CN202694974U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220355052 Expired - Lifetime CN202694974U (en) | 2012-07-20 | 2012-07-20 | Waterproof water-tree-retardant medium voltage cross-linked three-core cable |
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| Country | Link |
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| CN (1) | CN202694974U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227004A (en) * | 2013-04-23 | 2013-07-31 | 江苏新长峰线缆有限公司 | Flexible water-proof cable |
| CN106158115A (en) * | 2015-04-02 | 2016-11-23 | 江苏宝安电缆有限公司 | One is pressed crosslinked polyethylene water repellent electric cable |
| CN108417301A (en) * | 2018-04-19 | 2018-08-17 | 远东电缆有限公司 | Water resistant tree power cable with cross-linked polyethylene insulation and production technology are pressed in one kind |
-
2012
- 2012-07-20 CN CN 201220355052 patent/CN202694974U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227004A (en) * | 2013-04-23 | 2013-07-31 | 江苏新长峰线缆有限公司 | Flexible water-proof cable |
| CN106158115A (en) * | 2015-04-02 | 2016-11-23 | 江苏宝安电缆有限公司 | One is pressed crosslinked polyethylene water repellent electric cable |
| CN108417301A (en) * | 2018-04-19 | 2018-08-17 | 远东电缆有限公司 | Water resistant tree power cable with cross-linked polyethylene insulation and production technology are pressed in one kind |
| CN108417301B (en) * | 2018-04-19 | 2024-02-02 | 远东电缆有限公司 | Medium-voltage water tree-resistant crosslinked polyethylene insulated power cable and production process thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |