CN216817938U - 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable - Google Patents
6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable Download PDFInfo
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- CN216817938U CN216817938U CN202123346128.8U CN202123346128U CN216817938U CN 216817938 U CN216817938 U CN 216817938U CN 202123346128 U CN202123346128 U CN 202123346128U CN 216817938 U CN216817938 U CN 216817938U
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Abstract
The utility model belongs to the technical field of cables, and particularly relates to a 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-current-carrying-capacity power cable which comprises a conductor, a conductor shielding layer, a high-temperature fire-resistant insulating layer, an insulating shielding layer, a metal shielding layer, a fire-resistant filling layer, a fire-resistant belting layer, a fire-resistant isolating layer and a sheath layer. The utility model provides a 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-current-carrying-capacity power cable which has better flame retardant property, fire resistance, environmental protection property and high current-carrying capacity and is safer.
Description
Technical Field
The utility model belongs to the technical field of cables, and particularly relates to a 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable.
Background
Along with the increase of the power supply interruption ratio of a power system caused by the ignition of a power cable in a fire accident, fire-retardant cables are adopted to prevent the fire from spreading in places such as power plants and substations with a large amount of electrical equipment and densely laid with a large amount of cables, and it is increasingly important to adopt the fire-retardant cables to ensure that an important loop is not powered off. Especially, in more and more fire-fighting loops in high-rise and super-high-rise buildings, the low-voltage fire-resistant cable cannot meet the requirement of cable voltage drop, and a medium-voltage fire-resistant cable is urgently needed to be adopted for secondary voltage transformation so as to meet the requirement of normal power supply during fire fighting of the fire-fighting loop.
The difficulty and significance for solving the technical problems are as follows:
therefore, based on the problems, the provision of the class-A environment-friendly flame-retardant power cable with the high carrying capacity and the level-A flame-retardant power cable with the high carrying capacity of 6-35kV, which has better flame retardant performance, fire resistance, environment-friendly performance and safety, has important practical significance.
SUMMERY OF THE UTILITY MODEL
The application aims to solve the technical problems in the prior art and provide a 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable which has better flame retardant performance, fire resistance, environmental protection performance, high carrying capacity and higher safety.
The technical scheme adopted by the embodiment of the application to solve the technical problems in the prior art is as follows:
the utility model provides a fire-retardant A level fire-resistant high current-carrying capacity power cable of 6-35kV level environmental protection, the fire-retardant A level fire-resistant high current-carrying capacity power cable of 6-35kV level environmental protection includes conductor, conductor shielding layer, high temperature fire-resistant insulating layer, insulation shield, metallic shield, fire-resistant filling layer, fire-resistant band layer, fire-resistant isolation layer and restrictive coating, conductor shielding layer, high temperature fire-resistant insulating layer, insulation shield and metallic shield set gradually from inside to outside, form the insulation core, after two at least insulation core strands become the cable, form the cable core, the cable core outside is wrapped up by fire-resistant band layer, fire-resistant isolation layer and restrictive coating from inside to outside in proper order, fill through fire-resistant filling layer between metallic shield and the fire-resistant band layer.
The structure design of the fire-resistant wrapping layer and the fire-resistant isolating layer is added, and the durable ceramic halogen-free low-smoke flame-retardant polyolefin material simultaneously meets the GB/T19666A grade bundled combustion performance requirement and the BS6387CZW fire-resistant integrity or the BS8491 120-minute fire-resistant integrity test.
The embodiment of the application can also adopt the following technical scheme:
in the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable, a steel-tape armor layer is further arranged between the fire-resistant isolation layer and the sheath layer.
In the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable, the steel belt armor layer is a double-layer galvanized steel belt or stainless steel belt.
The armor can mainly play a role in protecting the cable when the cable receives external force.
In the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-current-carrying-capacity power cable, furthermore, the nominal section of the conductor is 1.5-1000 mm2。
In the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-current-carrying-capacity power cable, the conductor shielding layer, the high-temperature fire-resistant insulating layer and the insulation shielding layer are extruded simultaneously by three-layer co-extrusion, the high-temperature fire-resistant insulating layer is made of ceramic fire-resistant silicon rubber, and the conductor shielding layer and the insulation shielding layer are made of semi-conductive rubber based on silicon rubber.
The ceramic fireproof and fireproof silicone rubber is used as a high-temperature fireproof insulating layer, and the material has excellent electrical property, fireproof property, high and low temperature resistance, physical and mechanical properties, halogen-free low-smoke property and the like.
In the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable, the metal shielding layer is formed by wrapping a copper strip or weaving a copper wire.
In the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable, the fire-resistant filling layer is further filled with alkali-free glass fiber filling ropes.
The alkali-free glass fiber filling rope has a high flame-retardant effect, and is beneficial to improving the flame-retardant property of the finished cable.
In the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable, further, the fire-resistant belting layer is lapped and wrapped by adopting double layers of alkali-free glass fiber tapes.
The alkali-free glass fiber tape has high fireproof performance, and the fire-resistant characteristic of the cable can be ensured by adopting a double-layer wrapping mode.
In the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable, further, the fire-resistant isolation layer is made of ceramic low-smoke halogen-free flame-retardant polyolefin fire-resistant material.
The ceramic low-smoke halogen-free flame-retardant polyolefin refractory material is used as a fire-retardant isolation layer, can meet fire-retardant requirements, has no halogen and low smoke, and has the advantage of environmental protection.
In the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable, the sheath layer is made of a flame-retardant low-smoke halogen-free polyolefin material.
The thickness of the sheath layer is 1.5-3.0 mm, the sheath layer meets the relevant product standard regulations, and the material has excellent physical and mechanical properties, oil resistance, acid and alkali resistance, excellent aging resistance and the like.
One or more technical schemes provided in the embodiment of the application have at least the following beneficial effects:
1. the utility model adopts the high-temperature fire-resistant insulating layer of the ceramic fireproof fire-resistant silicon rubber and the fire-resistant isolating layer of the ceramic low-smoke halogen-free flame-retardant polyolefin fire-resistant material as the double fire-resistant protection design, so that the cable can pass the fire-resistant integrity test of BS6387C and W, Z or the fire-resistant integrity test requirement of BS8491 standard 120min, and the cable can be continuously supplied with power for at least 3 hours in the combustion process at 950 ℃.
2. The utility model has excellent flame retardant property: by adopting high flame-retardant materials and the structural design of adding the fireproof filling layer and the fireproof wrapping layer, the cable is ensured to meet all index requirements of A-level flame retardant performance.
3. The utility model has high current-carrying capacity and heat-resisting and cold-resisting properties: the material adopted by the utility model has high flame retardance and good low-temperature performance, and the conductor shielding layer and the insulation shielding layer have excellent high temperature resistance (180 ℃) and low temperature resistance (-65 ℃), and the high temperature resistance ensures that the cable has high current-carrying capacity. Therefore, the utility model discloses have heat-resisting cold-resistant, high current-carrying capacity, fire-resistant, fire-retardant performance, have the environmental protection performance of steamed low cigarette of nothing, and toxicity index less than or equal to 3, the low toxicity is safer.
4. The cable has the characteristics of high flame retardant property, high fire resistance, high current-carrying capacity, good physical and mechanical properties, high current-carrying capacity, environmental protection, safety, heat resistance, cold resistance and the like, meets the requirement of normal power supply during fire fighting of a fire-fighting loop, and ensures the life safety of fire-fighting and escape personnel during fire to the greatest extent due to the environmental protection and safety.
Drawings
Fig. 1 is a cross-sectional structural view of the high voltage fire resistant power cable of the present invention.
Fig. 2 is a cross-sectional structural view of a fire-resistant power cable of the present invention.
In the figure, 1, a conductor, 2, a conductor shielding layer, 3, a high-temperature fire-resistant insulating layer, 4, an insulating shielding layer, 5, a metal shielding layer, 6, a fire-resistant filling layer, 7, a fire-resistant belting layer, 8, a fire-resistant isolating layer, 9, a sheath layer, 10 and a steel belt armor layer.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example 1
The utility model discloses an environment-friendly safe flame-retardant A-level fire-resistant high-current-carrying-capacity power cable with rated voltage of 6-35kV, which comprises a conductor 1, a conductor shielding layer 2, a high-temperature fire-resistant insulating layer 3, an insulating shielding layer 4, a metal shielding layer 5, a fire-resistant filling layer 6, a fire-resistant belting layer 7, a fire-resistant isolating layer 8, a steel-belt armor layer 10 and a sheath layer 9.
The conductor 1 is composed of copper conductors meeting GB/T3956-2008, and the overall performance of the conductor meets the relevant regulations of the 1 st solid conductor, the 2 nd or 5 th stranded conductor in GB/T3956-2008.
The thickness of the conductor shielding layer 2 is 0.2-1.0, the thickness of the fire-resistant insulating layer 3 is 0.6-1.5, and the thickness of the insulating shielding layer 4 is 0.2-1.0.
The thickness and the performance of the metal shielding layer 5 meet the requirements of the GB/T12706 standard.
The fireproof filling 6 is filled by alkali-free glass fiber filling ropes, and is a fireproof and moisture-proof material.
The glass fiber tape lapping layer 7 is formed by lapping double layers of alkali-free glass fiber tapes in an overlapping mode, and the lapping rate is not less than 20%.
The fire-resistant isolation layer 8 is a ceramic low-smoke halogen-free flame-retardant polyolefin fire-resistant material.
The sheath layer 9 is an A-grade flame-retardant low-smoke halogen-free polyolefin material.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
compared with the traditional medium-voltage power cable, the cable provided by the utility model has the advantages of higher flame-retardant and fire-resistant performance, soft structure and convenience in installation, and meanwhile, the cable has good heat-resistant performance and can have the performances of higher current-carrying capacity, excellent physical and mechanical properties, electrical properties, cold resistance, environmental protection, safety and the like under the same conditions.
Example 2
And a steel tape armor layer is arranged between the fire-resistant isolation layer and the sheath layer. The steel belt armor layer adopts a double-layer galvanized steel belt or a stainless steel belt.
The armor can mainly play a role in protecting the cable when the cable receives external force.
In conclusion, the utility model provides the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable which has better flame retardant performance, fire resistance, environmental protection performance, high carrying capacity and is safer.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. The utility model provides a fire-resistant high ampacity power cable of 6-35kV level environmental protection fire-retardant A level which characterized in that: the 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-current-carrying-capacity power cable comprises a conductor, a conductor shielding layer, a high-temperature fire-resistant insulating layer, an insulating shielding layer, a metal shielding layer, a fire-resistant filling layer, a fire-resistant belting layer, a fire-resistant isolating layer and a sheath layer, wherein the conductor, the conductor shielding layer, the high-temperature fire-resistant insulating layer, the insulating shielding layer and the metal shielding layer are sequentially arranged from inside to outside to form an insulating wire core, at least two strands of insulating wire cores are twisted into a cable to form a cable core, the outer side of the cable core is sequentially wrapped by the fire-resistant belting layer, the fire-resistant isolating layer and the sheath layer from inside to outside, and the metal shielding layer and the fire-resistant belting layer are filled through the fire-resistant filling layer.
2. The environment-friendly flame-retardant class-A fire-resistant high-ampacity power cable according to claim 1, wherein the cable comprises: and a steel strip armor layer is arranged between the fire-resistant isolation layer and the sheath layer.
3. The environment-friendly flame-retardant class-A fire-resistant high-ampacity power cable according to claim 2, wherein the cable comprises: the steel belt armor layer adopts a double-layer galvanized steel belt or a stainless steel belt.
4. The environment-friendly flame-retardant class-A fire-resistant high-ampacity power cable according to claim 1, wherein the cable comprises: the nominal section of the conductor is 1.5-1000 mm2。
5. The environment-friendly flame-retardant class-A fire-resistant high-ampacity power cable according to claim 1, wherein the cable comprises: the conductor shielding layer, the high-temperature fire-resistant insulating layer and the insulation shielding layer are extruded simultaneously by adopting three-layer co-extrusion, the high-temperature fire-resistant insulating layer is made of ceramic fire-resistant silicon rubber, and the conductor shielding layer and the insulation shielding layer are made of semi-conductive rubber based on the silicon rubber.
6. The environment-friendly flame-retardant class-A fire-resistant high-ampacity power cable according to claim 1, wherein the cable comprises: the metal shielding layer is formed by lapping a copper strip or weaving a copper wire.
7. The environment-friendly flame-retardant class-A fire-resistant high-ampacity power cable according to claim 1, wherein the cable comprises: the fire-resistant filling layer is filled by alkali-free glass fiber filling ropes.
8. The environment-friendly flame-retardant class-A fire-resistant high-ampacity power cable according to claim 1, wherein the cable comprises: the fire-resistant belting layer adopts double layers of alkali-free glass fiber tapes for overlapping and lapping.
9. The environment-friendly flame-retardant class-A fire-resistant high-ampacity power cable according to claim 1, wherein the cable comprises: the fire-resistant isolation layer is made of ceramic low-smoke halogen-free flame-retardant polyolefin fire-resistant material.
10. The environment-friendly flame-retardant class-A fire-resistant high-ampacity power cable according to claim 1, wherein the cable comprises: the sheath layer is made of flame-retardant low-smoke halogen-free polyolefin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123346128.8U CN216817938U (en) | 2021-12-28 | 2021-12-28 | 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123346128.8U CN216817938U (en) | 2021-12-28 | 2021-12-28 | 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable |
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| Publication Number | Publication Date |
|---|---|
| CN216817938U true CN216817938U (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123346128.8U Active CN216817938U (en) | 2021-12-28 | 2021-12-28 | 6-35 kV-level environment-friendly flame-retardant A-level fire-resistant high-carrying-capacity power cable |
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| CN (1) | CN216817938U (en) |
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2021
- 2021-12-28 CN CN202123346128.8U patent/CN216817938U/en active Active
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