CN111627607A - Halogen-free flame-retardant low-voltage cable - Google Patents
Halogen-free flame-retardant low-voltage cable Download PDFInfo
- Publication number
- CN111627607A CN111627607A CN201910145134.5A CN201910145134A CN111627607A CN 111627607 A CN111627607 A CN 111627607A CN 201910145134 A CN201910145134 A CN 201910145134A CN 111627607 A CN111627607 A CN 111627607A
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- halogen
- outside
- mica tape
- cable
- retardant
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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Abstract
The invention provides a halogen-free flame-retardant low-voltage cable, which comprises a cable core and is characterized in that: the cable core central point puts to be the copper conductor, copper conductor outside is provided with interior mica tape, interior mica tape outside is provided with the insulating layer, the insulating layer outside is provided with the isolation layer, three cable cores are regular triangle-shaped and arrange, the cable core outside is provided with the magnesium hydrate filling layer, the outside mica tape outside is wrapped around the magnesium hydrate filling layer, the outside mica tape outside is provided with the halogen-free fire-retardant area of low pressure, the outside halogen-free sheath that is provided with of low pressure, utilize the fire-retardant mode of the cable structure and the multilayer of brand-new design, the effectual fire behaviour who promotes wire and cable.
Description
Technical Field
The invention relates to the technical field of wired cable production, in particular to a halogen-free flame-retardant low-voltage cable.
Background
In the production and manufacturing process of the electric wire and cable, along with the progress of science and technology and the higher and higher requirements of people on environmental protection and safety, the design of the electric wire and cable which is safer, more environment-friendly and flame retardant is always the key point of focusing in the industry.
Disclosure of Invention
The invention aims to provide a halogen-free flame-retardant low-voltage cable, which utilizes a brand-new designed cable structure and a multi-layer flame-retardant mode to effectively improve the flame-retardant performance of the electric wire and cable.
In order to achieve the purpose, the invention adopts the technical scheme that:
the halogen-free flame-retardant low-voltage cable comprises a cable core and is characterized in that: the cable core central point puts for the copper conductor, and copper conductor outside is provided with interior mica tape, and interior mica tape outside is provided with the insulating layer, and the insulating layer outside is provided with the isolation layer, and three cable cores are regular triangle-shaped and arrange, and the cable core outside is provided with the magnesium hydrate filling layer, and the magnesium hydrate filling layer outside is around wrapping outer mica tape, and outer mica tape outside is provided with the fire-retardant area of low pressure halogen-free, and the fire-retardant outband of low pressure halogen-free is provided with the halogen-free.
As a further improvement of the invention, the inner mica tape and the outer mica tape are both synthetic mica and are covered at corresponding positions by using a wrapping technology.
As a further improvement of the invention, a copper wire is arranged at the central position of the copper conductor, six copper wires are arranged on the second layer of the copper conductor from inside to outside, twelve copper wires are arranged on the third layer of the copper conductor from inside to outside, eighteen copper wires are arranged on the outermost layer of the copper conductor, and the copper wires are annealed independently for 3 hours at 950-1000 ℃.
As a further improvement of the invention, the insulating layer is made of cross-linked polyethylene.
As a further improvement of the invention, the halogen-free sheath is made of cross-linked polyolefin.
The invention has the beneficial effects that through reasonable cable layer design, no halogen is introduced in the production and manufacturing process, so that after the cable is ignited, no toxic gas is released due to the combustion of the cable, and after the outermost layer of the cable is manufactured by adopting the cross-linked polyolefin, the cable has certain flame retardant and fire resistant performance due to the existence of cross-linked bonds, and the inorganic flame retardant of the double mica tape and the magnesium hydroxide is also adopted, so that the strong flame retardant performance of the mica tape is utilized, and the magnesium hydroxide can absorb heat to react to generate magnesium oxide and water under the high-temperature condition, so that the reaction can absorb a large amount of heat, the cable core can be effectively protected, and after a large amount of combustion tests, the reasonable layer layout design is adopted to meet the flame retardant requirement of the cable.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.
The halogen-free flame-retardant low-voltage cable comprises a cable core 5 and is characterized in that: the central position of the cable core 5 is a copper conductor 6, an inner mica tape 3 is arranged outside the copper conductor 6, an insulating layer 2 is arranged outside the inner mica tape 3, an isolating layer 1 is arranged outside the insulating layer 2, the three cable cores 5 are arranged in a regular triangle, a magnesium hydroxide filling layer 4 is arranged outside the cable core 5, an outer mica tape 7 is wrapped outside the magnesium hydroxide filling layer 4, a low-voltage halogen-free flame-retardant tape 8 is arranged outside the outer mica tape 7, a halogen-free sheath 9 is arranged outside the low-voltage halogen-free flame-retardant tape 8, through reasonable cable layer number design, halogen is not brought in the production and manufacturing process, therefore, after the cable is ignited, toxic gas can not be released due to the combustion of the cable, and the inorganic flame retardant of the double mica tape and the magnesium hydroxide is adopted, the stronger flame-retardant performance of the mica tape is utilized, and the magnesium hydroxide can absorb heat to react, such a reaction can absorb a large amount of heat and also can effectively protect the cable core.
As a further preferable scheme of the invention, the inner mica tape 3 and the outer mica tape 7 are both synthetic mica, and are covered at corresponding positions by using a wrapping technology, and the wrapped synthetic mica tape has stronger flame-retardant and fire-resistant properties.
As a further preferable scheme of the invention, a copper wire is arranged at the center of the copper conductor 6, six copper wires are arranged on the second layer of the copper conductor 6 from inside to outside, twelve copper wires are arranged on the third layer of the copper conductor 6 from inside to outside, eighteen copper wires are arranged on the outermost layer of the copper conductor 6, the copper wires are annealed independently at the temperature of 950 plus 1000 ℃ for 3 hours, after the copper wires are withdrawn independently, the stress in the copper wires can be eliminated to a greater degree, the flexibility of the copper wires is improved, the resistance and the conductive heating performance of the copper wires are reduced, and the copper wires are arranged in a relatively compact manner, so that the conductive heating value is lower.
In a further preferred embodiment of the present invention, the insulating layer 2 is made of crosslinked polyethylene, which has strong flame retardancy during combustion due to the presence of crosslinking bonds, and which has a net-like frame structure, has strong shape-retaining properties during combustion, and effectively retains the shape of the cable during combustion.
As a further preferable scheme of the present invention, the halogen-free sheath 9 is made of cross-linked polyolefin, and has a certain flame retardant and fire resistant performance due to the presence of cross-linked bonds after the cable outermost layer is made of cross-linked polyolefin.
Claims (5)
1. A halogen-free flame-retardant low-voltage cable comprises a cable core (5), and is characterized in that: the central position of the cable core (5) is a copper conductor (6), an inner mica tape (3) is arranged outside the copper conductor (6), an insulating layer (2) is arranged outside the inner mica tape (3), an isolating layer (1) is arranged outside the insulating layer (2), the three cable cores (5) are arranged in a regular triangle shape, a magnesium hydroxide filling layer (4) is arranged outside the cable core (5), an outer mica tape (7) is wrapped outside the magnesium hydroxide filling layer (4), a low-pressure halogen-free flame retardant tape (8) is arranged outside the outer mica tape (7), and a halogen-free sheath (9) is arranged outside the low-pressure halogen-free flame retardant tape (8).
2. The halogen-free flame-retardant low-voltage cable according to claim 1, wherein: the inner mica tape (3) and the outer mica tape (7) are both synthetic mica and are covered at corresponding positions by using a wrapping technology.
3. The halogen-free flame-retardant low-voltage cable according to claim 2, wherein: the central position of the copper conductor (6) is provided with a copper wire, the second layer of the copper conductor (6) from inside to outside is provided with six copper wires, the third layer of the copper conductor (6) from inside to outside is provided with twelve copper wires, the outermost layer of the copper conductor (6) is provided with eighteen copper wires, and the copper wires are annealed independently at 950-1000 ℃ for 3 hours.
4. The halogen-free flame-retardant low-voltage cable according to claim 1, wherein: the insulating layer (2) is made of cross-linked polyethylene.
5. The halogen-free flame-retardant low-voltage cable according to claim 1, wherein: the halogen-free sheath (9) is made of cross-linked polyolefin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910145134.5A CN111627607A (en) | 2019-02-27 | 2019-02-27 | Halogen-free flame-retardant low-voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910145134.5A CN111627607A (en) | 2019-02-27 | 2019-02-27 | Halogen-free flame-retardant low-voltage cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111627607A true CN111627607A (en) | 2020-09-04 |
Family
ID=72261129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910145134.5A Pending CN111627607A (en) | 2019-02-27 | 2019-02-27 | Halogen-free flame-retardant low-voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111627607A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5641610A (en) * | 1979-09-13 | 1981-04-18 | Sumitomo Electric Industries | Fire resistant electric wire |
| CN201751946U (en) * | 2010-06-21 | 2011-02-23 | 祝亨林 | Novel cable |
| KR20120005246A (en) * | 2010-07-08 | 2012-01-16 | 엘에스전선 주식회사 | Highly fire resistant cable |
| CN202275642U (en) * | 2011-10-18 | 2012-06-13 | 上海市高桥电缆厂有限公司 | Mineral insulating flexible fireproof cable |
| CN203118559U (en) * | 2013-01-30 | 2013-08-07 | 安徽新科电缆集团股份有限公司 | Novel halogen free low smoke fireproof control cable |
| CN205692608U (en) * | 2016-04-23 | 2016-11-16 | 江苏东强股份有限公司 | High fire-retardance fire safe type lv power cable |
| KR20170064246A (en) * | 2015-12-01 | 2017-06-09 | 엘에스전선 주식회사 | High fire-resistant cable |
| CN207068496U (en) * | 2017-05-18 | 2018-03-02 | 无锡市新阳光电缆有限公司 | Fire proof power cable is pressed in one kind |
| CN108538480A (en) * | 2018-03-20 | 2018-09-14 | 北京市天华伟业线缆有限公司 | A kind of novel mineral insulating flexible fireproof cable |
-
2019
- 2019-02-27 CN CN201910145134.5A patent/CN111627607A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5641610A (en) * | 1979-09-13 | 1981-04-18 | Sumitomo Electric Industries | Fire resistant electric wire |
| CN201751946U (en) * | 2010-06-21 | 2011-02-23 | 祝亨林 | Novel cable |
| KR20120005246A (en) * | 2010-07-08 | 2012-01-16 | 엘에스전선 주식회사 | Highly fire resistant cable |
| CN202275642U (en) * | 2011-10-18 | 2012-06-13 | 上海市高桥电缆厂有限公司 | Mineral insulating flexible fireproof cable |
| CN203118559U (en) * | 2013-01-30 | 2013-08-07 | 安徽新科电缆集团股份有限公司 | Novel halogen free low smoke fireproof control cable |
| KR20170064246A (en) * | 2015-12-01 | 2017-06-09 | 엘에스전선 주식회사 | High fire-resistant cable |
| CN205692608U (en) * | 2016-04-23 | 2016-11-16 | 江苏东强股份有限公司 | High fire-retardance fire safe type lv power cable |
| CN207068496U (en) * | 2017-05-18 | 2018-03-02 | 无锡市新阳光电缆有限公司 | Fire proof power cable is pressed in one kind |
| CN108538480A (en) * | 2018-03-20 | 2018-09-14 | 北京市天华伟业线缆有限公司 | A kind of novel mineral insulating flexible fireproof cable |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200904 |