CN202584900U - Water-tree resistant cable - Google Patents
Water-tree resistant cable Download PDFInfo
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- CN202584900U CN202584900U CN 201220193045 CN201220193045U CN202584900U CN 202584900 U CN202584900 U CN 202584900U CN 201220193045 CN201220193045 CN 201220193045 CN 201220193045 U CN201220193045 U CN 201220193045U CN 202584900 U CN202584900 U CN 202584900U
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- water tree
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Abstract
The utility model discloses a water-tree resistant cable and aims to provide the water-tree resistant cable which is improved in stretching resistance and side pressure resistance and high in safety performance, is rotproof, waterproof and water-tree resistant, has a shielding inhibition coefficient of not more than 0.05, and meets RoHS (Restriction Of Hazardous Substances) environmental protection standards. In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: the water-tree resistant cable comprises a conductor, wherein the external layer of the conductor is concentrically and sequentially wrapped by a conductor shielding layer, an insulating layer and an insulation shielding layer; the conductor shielding layer, the insulating layer and the insulation shielding layer are of a three-layer coextrusion structure; and the external layer of the insulation shielding layer is provided with a copper-strip shielding layer, a waterproof buffer layer, an aluminum sheath and an environmental-friendly plastic sheath in sequence. According to the utility model, the content of mercury, lead, cadmium, hexavalent chromium, poly-brominated biphenyl and poly-brominated biphenyl ether in the adopted environmental-friendly plastic sheath meets the RoHS environmental protection standards; and the water-tree resistant cable is rotproof, durable and capable of effectively preventing generation of the water tree.
Description
Technical field
The utility model relates to a kind of cable, particularly a kind of anti-water tree cable.
Background technology
Middle important component part of pressing the crosslinked cable circuit to become China's electrical network, its operational reliability has directly influenced the electricity consumption reliability of power customers such as city dweller.According to incompletely statistics, the amount of putting into operation always of the annual midium voltage cable of nationwide integrated power grid system is 40000 kms.
The existing nearly 30 years history of the production of common crosslinked cable and application; It has good electric and mechanical performance under dry environment, but the environment of cable laying is relatively more abominable usually in practical application, and cable often needs short-term or long period of soaking in water; Perhaps be in the very big environment of moisture humidity; And common crosslinked cable does not have anti-water tree ability fully, uses the moisture in the absorbing environmental gradually of insulation down long-term, and has a large amount of slight void owing in the cable insulation; Therefore in micropore, can be full of moisture, and the water-filling micropore can produce the water tree under very low voltage.Under the long term of electric field, can cause a large amount of water trees in the cable insulation, the water tree aging makes the insulating molecule cracking; When the water tree reaches capacity state in the micropore, insulation electrical and mechanical performance will sharply descend, and the water tree of conduction (electric branch) is understood a large amount of electric energy of loss, and finally causes the puncture of cable insulation, thereby significantly reduces cable life.
Compare with industrially developed country such as America and Europes, the operation troubles rate of China's midium voltage cable electric line is higher relatively.Wherein, because the inner extreme prematurity unboiled water tree of cable causes that cable generation water tree punctures, be one of key factor that causes line accident.And its root be common crosslinked cable in the running environment of humidity, the tree growth of insulation internal water is too fast, makes due to the insulation property of cable line significantly descend.
Present common middle pressure cross-linked polyethylene insulated cable, its structure is conductor, conductor screen, XLPE insulation, insulation shielding, copper strips shielding, steel band, PVC or PE sheath.The requirement of aspects such as that this structure Design can not satisfy is anticorrosion, waterproof, anti-water tree, environmental protection, it is imperative therefore to design the new structure cable that meets above-mentioned instructions for use.
Summary of the invention
The technical problem that the utility model will solve provide a kind ofly have that stretching resistance and lateral pressure, security performance are high, anticorrosion, waterproof, cable shield rejection coefficient are no more than 0.05, anti-water tree, meet the anti-water tree cable of RoHS environmental protection standard.
For solving the problems of the technologies described above; The utility model adopts following technical scheme: a kind of anti-water tree cable; Comprise conductor; Said conductor skin is coated with conductor shield, insulating barrier, insulation screen with one heart successively, and said conductor shield, insulating barrier, insulation screen are three-layer co-extruded structure, and the skin of said insulation screen is followed successively by copper strips screen, water-blocking buffer layer, aluminium sheath and environment-protective plastic casing.
The said conductor of the utility model is circular copper or aluminium conductor, and said conductor presses the strand system by monofilament and forms.
The said insulating barrier of the utility model is the anti-water tree of a TR-XLPE insulating barrier.
The rated characteristic impedance of the said copper strips screen of the utility model is not less than 75 Ω, and its rated current-carrying capacity is not less than 1.1KA/S.
The said aluminium sheath of the utility model is anticorrosion aluminium sheath, and its shielding rejection coefficient is no more than 0.05, and short circuit current is not less than 14.2KA/S, can bear the lateral pressure of 200N/m or the pulling force of 40N/mm2.
The said environment-protective plastic casing of the utility model is environment-friendly PVC material, environmental protection PE material or the environmental protection low-smoke halogen-free material that meets RoHS environmental protection standard regulation.
The said conductor of the utility model is three core conductors, and packed layer is arranged between the conductor.
The environment-protective plastic casing that the utility model adopts is environment-friendly PVC material, environmental protection PE material or environmental protection low-smoke halogen-free material; Mercury, lead, cadmium, sexivalent chromium in the plastics, gather bromo biphenyl, the content that gathers dibromodiphenyl ether meets RoHS environmental protection standard regulation; Not only anticorrosion durable, and can prevent effectively that the sealing tree produces.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one.
Fig. 2 is the structural representation of the utility model embodiment two.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain.
As shown in Figure 1; The anti-water tree cable of the utility model comprises conductor 1; Conductor 1 skin is coated with conductor shield 2, insulating barrier 3, insulation screen 4 with one heart successively, and conductor shield 2, insulating barrier 3, insulation screen 4 are three-layer co-extruded structure, and closely are extruded in outside the conductor 1.The skin of insulation screen 4 is followed successively by copper strips screen 5, water-blocking buffer layer 7, aluminium sheath 8 and environment-protective plastic casing 9.Wherein, conductor 1 is circular copper or aluminium conductor, presses the strand system by the multiply monofilament and forms; Insulating barrier 3 is the anti-water tree of TR-XLPE (anti-water tree cross-linking polyethylene materials) insulating barrier; The rated characteristic impedance of copper strips screen 5 (also can adopt the copper wire screen) is not less than 75 Ω, and its rated current-carrying capacity is not less than 1.1KA/S; Aluminium sheath 8 is anticorrosion aluminium sheath, and its shielding rejection coefficient is no more than 0.05, and short circuit current is not less than 14.2KA/S, can bear lateral pressure or the 40N/mm of 200N/m
2Pulling force; Environment-protective plastic casing is for meeting environment-friendly PVC material, environmental protection PE material or the environmental protection low-smoke halogen-free material of RoHS environmental protection standard (" about being limited in the instruction of using some harmful components in the electronic and electrical equipment " (Restriction of Hazardous Substances)) regulation.
As shown in Figure 2; Conductor 1 is three core conductor structures; Conductor 1 skin is coated with conductor shield 2, insulating barrier 3, insulation screen 4 and copper strips screen 5 with one heart successively; During the three-core cable stranding between the conductor space packed layer 6 is arranged, three core conductors behind the stranding are coated with water-blocking buffer layer 7, aluminium sheath 8 and environment-protective plastic casing 9 outward successively.
Claims (6)
1. anti-water tree cable; Comprise conductor (1); It is characterized in that: said conductor skin is coated with conductor shield (2), insulating barrier (3), insulation screen (4) with one heart successively; Said conductor shield (2), insulating barrier (3), insulation screen (4) are three-layer co-extruded structure, and the skin of said insulation screen (4) is followed successively by copper strips screen (5), water-blocking buffer layer (7), aluminium sheath (8) and environment-protective plastic casing (9).
2. anti-water tree cable according to claim 1 is characterized in that: said conductor (1) is circular copper or aluminium conductor, and said conductor (1) presses the strand system by monofilament and forms.
3. anti-water tree cable according to claim 2 is characterized in that: said insulating barrier (3) is the anti-water tree of TR-XLPE insulating barrier.
4. anti-water tree cable according to claim 3 is characterized in that: the rated characteristic impedance of said copper strips screen (5) is not less than 75 Ω, and its rated current-carrying capacity is not less than 1.1KA/S.
5. anti-water tree cable according to claim 4 is characterized in that: said aluminium sheath (8) is anticorrosion corrugated aluminum sheath, and its shielding rejection coefficient is no more than 0.05, and short circuit current is not less than 14.2KA/S, can bear lateral pressure or the 40N/mm of 200N/m
2Pulling force.
6. anti-water tree cable according to claim 5 is characterized in that: said environment-protective plastic casing is environment-friendly PVC material, environmental protection PE material or the environmental protection low-smoke halogen-free material that meets RoHS environmental protection standard regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220193045 CN202584900U (en) | 2012-04-28 | 2012-04-28 | Water-tree resistant cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220193045 CN202584900U (en) | 2012-04-28 | 2012-04-28 | Water-tree resistant cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202584900U true CN202584900U (en) | 2012-12-05 |
Family
ID=47254288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220193045 Expired - Lifetime CN202584900U (en) | 2012-04-28 | 2012-04-28 | Water-tree resistant cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202584900U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108364722A (en) * | 2018-01-23 | 2018-08-03 | 安徽国通电力建设有限公司 | A kind of more cable insulated power cables |
-
2012
- 2012-04-28 CN CN 201220193045 patent/CN202584900U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108364722A (en) * | 2018-01-23 | 2018-08-03 | 安徽国通电力建设有限公司 | A kind of more cable insulated power cables |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214242 No. 999, Dong Feng Dong Road, West Industrial Park, Yixing, Jiangsu Patentee after: JIANGSU ZHONGCHAO HOLDING CO., LTD. Address before: 214242 No. 999, Dong Feng Dong Road, West Industrial Park, Yixing, Jiangsu Patentee before: Jiangsu Zhongchao Cable Corporation |
|
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |
|
| CX01 | Expiry of patent term |