CN205722925U - The termite-proof medium-pressure power cable of water resistant tree - Google Patents
The termite-proof medium-pressure power cable of water resistant tree Download PDFInfo
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- CN205722925U CN205722925U CN201620396656.4U CN201620396656U CN205722925U CN 205722925 U CN205722925 U CN 205722925U CN 201620396656 U CN201620396656 U CN 201620396656U CN 205722925 U CN205722925 U CN 205722925U
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Abstract
This utility model relates to a kind of termite-proof medium-pressure power cable of water resistant tree, it includes conductor, described conductor outside surfaces is surrounded by conductor shield, insulating barrier, insulation screen and metal screen layer successively, gap during insulated wire cores stranding is provided with the packed layer that blocks water, and is coated with block water lapping layer, sealing coat, armor and oversheath outside the core after stranding successively；Conductor is circular copper or aluminium conductor, monofilament press strand system and form, and innermost layer uses water blocking yarn, uses waterstop between every layer of monofilament；Described conductor shield, insulating barrier and insulation screen are three-layer co-extruded structure；Insulating barrier is the crosslinked polyetylene insulated layer of water resistant tree；Sealing coat is low density polyethylene layer；Armor is double brass band armors；Oversheath is that high-density polyethylene material is made.This utility model can effectively stop the Coptotermes formosanus Shtrari. damage to cable and the longitudinal diffusion of moisture, reduces the moisture intrusion to insulator, the effectively initiation of water tree and growth in suppression cable insulation.
Description
Technical field
This utility model relates to a kind of cable, the specifically termite-proof medium-pressure power cable of water resistant tree.
Background technology
Power cable in most of the cases uses polrvinyl chloride or polythene material as oversheath, and both materials have the feature such as good mechanical performance and convenient for production, low cost.The consumption of power cable is continuously increased, and uses region gradually to expand.In coastal area, warmer climate, moist rainy, it is suitable for the growth of Coptotermes formosanus Shtrari., is the district occurred frequently of ant evil.In order to ensure that power cable is properly functioning, anti-termite cable all should be used in every place having Coptotermes formosanus Shtrari..Simultaneously; in the environment of humidity is rainy; common cross-linked polyethylene insulated cable does not possess water resistant tree ability; during life-time service; generally have portion of water and invade in insulation; cable, under the common effect of electric field and water, produces in insulation and is shaped like in dendritic containing aquaporin, referred to as water tree.Water tree can use the increase of time to be grown into along with cable, also can result in generating electric branch, eventually result in puncturing of cable insulation, thus affect the transmission of electric power under accidental overvoltage effect.
Summary of the invention
This utility model is intended to overcome the defect of prior art, it is provided that a kind of termite-proof medium-pressure power cable of water resistant tree, effectively suppresses initiation and the growth of water tree in medium-pressure power cable, improves the service life of cable.
In order to solve above-mentioned technical problem, this utility model is achieved in that
A kind of termite-proof medium-pressure power cable of water resistant tree, it is characterized in that: it includes conductor, described conductor outside surfaces is surrounded by conductor shield, insulating barrier, insulation screen and metal screen layer successively, gap during insulated wire cores stranding is provided with the packed layer that blocks water, and is coated with block water lapping layer, sealing coat, armor and oversheath outside the core after stranding successively.
The described termite-proof medium-pressure power cable of water resistant tree, it is characterised in that: described conductor is circular copper or aluminium conductor, monofilament press strand system and form, and innermost layer uses water blocking yarn, uses waterstop between every layer of monofilament；Described conductor shield, insulating barrier and insulation screen are three-layer co-extruded structure；Described insulating barrier is the crosslinked polyetylene insulated layer of water resistant tree；Described sealing coat is low density polyethylene layer；Described armor is double brass band armors；Described oversheath is that high-density polyethylene material is made.
The described termite-proof medium-pressure power cable of water resistant tree, it is characterised in that: the core after described stranding is formed by three conductor strand.
The beneficial effects of the utility model are: ensure that cable exempts from termite destruction；Use water-blocking conductor, water-tree-retardant cable insulation material, block water gasket for packing and aluminium-plastic tape, can effectively stop cable radially and the problem of longitudinally water inlet, and effectively suppresses initiation and the growth of water tree in medium-pressure power cable, improves the service life of cable.
Accompanying drawing explanation
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
As shown in Figure 1: a kind of termite-proof medium-pressure power cable of water resistant tree, it includes three conductors 1, described conductor outside surfaces is surrounded by conductor shield 2, insulating barrier 3, insulation screen 4 and metal screen layer 5 successively, gap during insulated wire cores stranding is provided with the packed layer 6 that blocks water, and is coated with block water lapping layer 7, sealing coat 8, armor 9 and oversheath 10 outside the core after stranding successively.Cable core after described stranding is formed by three insulated wire cores are stranded.
Described conductor is circular copper or aluminium conductor, monofilament press strand system and form, and innermost layer uses water blocking yarn, uses waterstop between every layer of monofilament；Described conductor shield, insulating barrier and insulation screen are three-layer co-extruded structure；Described insulating barrier is the crosslinked polyetylene insulated layer of water resistant tree, can effectively suppress initiation and the growth of water tree, improves service life and the reliability of system of cable；Described sealing coat is low density polyethylene layer；Described armor is double brass band armors, can effectively stop the Coptotermes formosanus Shtrari. damage to cable；Described oversheath is that high-density polyethylene material is made.
Block water gasket for packing and the lapping layer that blocks water, and can effectively stop the longitudinal diffusion of moisture, reduce the moisture intrusion to insulator.
Claims (3)
1. the termite-proof medium-pressure power cable of water resistant tree, it is characterized in that: it includes conductor, described conductor outside surfaces is surrounded by conductor shield, insulating barrier, insulation screen and metal screen layer successively, gap during insulated wire cores stranding is provided with the packed layer that blocks water, and is coated with block water lapping layer, sealing coat, armor and oversheath outside the core after stranding successively.
The termite-proof medium-pressure power cable of water resistant tree the most according to claim 1, it is characterised in that: described conductor is circular copper or aluminium conductor, monofilament press strand system and form, and innermost layer uses water blocking yarn, uses waterstop between every layer of monofilament；Described conductor shield, insulating barrier and insulation screen are three-layer co-extruded structure；Described insulating barrier is the crosslinked polyetylene insulated layer of water resistant tree；Described sealing coat is low density polyethylene layer；Described armor is double brass band armors；Described oversheath is that high-density polyethylene material is made.
The termite-proof medium-pressure power cable of water resistant tree the most according to claim 1 and 2, it is characterised in that: the core after described stranding is formed by three conductor strand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620396656.4U CN205722925U (en) | 2016-05-05 | 2016-05-05 | The termite-proof medium-pressure power cable of water resistant tree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620396656.4U CN205722925U (en) | 2016-05-05 | 2016-05-05 | The termite-proof medium-pressure power cable of water resistant tree |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205722925U true CN205722925U (en) | 2016-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620396656.4U Active CN205722925U (en) | 2016-05-05 | 2016-05-05 | The termite-proof medium-pressure power cable of water resistant tree |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205722925U (en) |
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2016
- 2016-05-05 CN CN201620396656.4U patent/CN205722925U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 201514 Shanghai city Jinshan District zhenkang Zhangyan Town Road No. 238 Patentee after: Shanghai Qifan cable Limited by Share Ltd Address before: 201514 Shanghai city Jinshan District Zhangyan Town Economic Development Zone Zhang Yan Kang Road No. 238 vibration Patentee before: Shanghai Qifan Electric Wire Electric Cable Co., Ltd. |