CN111627608A - A-type flame-retardant fire-resistant medium-voltage cable and production method thereof - Google Patents
A-type flame-retardant fire-resistant medium-voltage cable and production method thereof Download PDFInfo
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- CN111627608A CN111627608A CN201910144952.3A CN201910144952A CN111627608A CN 111627608 A CN111627608 A CN 111627608A CN 201910144952 A CN201910144952 A CN 201910144952A CN 111627608 A CN111627608 A CN 111627608A
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- layer
- retardant
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- copper
- flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0006—Apparatus or processes specially adapted for manufacturing conductors or cables for reducing the size of conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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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
- H01B7/02—Disposition of insulation
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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
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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
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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
Abstract
The invention provides an A-type flame-retardant fire-resistant medium-voltage cable and a production method thereof, wherein the A-type flame-retardant fire-resistant medium-voltage cable comprises a cable core and is characterized in that: the cable core becomes regular triangle and arranges, cable core central point puts and is provided with the copper conductor, copper conductor outside is provided with the conductor shield, the conductor shield outside is provided with the insulating layer, the insulating layer outside is provided with the insulating shield, the insulating shield outside is provided with the magnesium hydrate filling layer, the magnesium hydrate filling layer outside is provided with the ceramic silastic-layer, ceramic silastic-layer outside is provided with fire-retardant inner sheath, fire-retardant inner sheath outside is provided with the copper strips, the copper strips outside is provided with synthetic mica layer, synthetic mica layer outside is provided with fire-retardant outer jacket, utilize the multilayer to wind the package technique, satisfy the fire resistance of cable.
Description
Technical Field
The invention relates to the technical field of wired and cable production, in particular to an A-type flame-retardant fire-resistant medium-voltage cable and a production method thereof.
Background
In the production process of the electric wire and the electric cable, because the requirements on quality and environmental protection are higher and higher, the electric wire and the electric cable produced in the past can not meet the requirements of the prior art due to various reasons, and the development of novel electric wires and electric cables is always a difficult point in the industry.
Disclosure of Invention
The invention aims to provide an A-type flame-retardant fire-resistant medium-voltage cable and a production method thereof, which utilize a multilayer wrapping technology to meet the fire-resistant performance of the cable.
In order to achieve the purpose, the invention adopts the technical scheme that:
a flame-retardant fire-resistant medium voltage cable of A class and its preparation method, including the cable core, characterized by that: the cable core becomes regular triangle and arranges, cable core central point puts and is provided with the copper conductor, copper conductor outside is provided with conductor shield, conductor shield outside is provided with the insulating layer, the insulating layer outside is provided with the insulating shield, the insulating shield outside is provided with the magnesium hydrate filling layer, the magnesium hydrate filling layer outside is provided with the ceramic silastic-layer, ceramic silastic-layer outside is provided with fire-retardant inner sheath, fire-retardant inner sheath outside is provided with the copper strips, the copper strips outside is provided with synthetic mica layer, synthetic mica layer outside is provided with fire-retardant outer jacket.
The production method comprises the following steps: firstly, a drawing machine is utilized to draw a copper wire to a diameter meeting the design requirement, and a primary annealing furnace is used for continuously annealing the copper wire in the drawing process; secondly, forming copper conductors from copper stranded wires meeting the size; thirdly, placing the bundled copper conductors in a secondary annealing furnace for annealing for 3 hours at 950 ℃ and 1000 ℃; then, cable production was performed according to the cable production method.
As a further improvement of the invention, the insulating layer is extruded by crosslinked polyethylene and then is subjected to irradiation crosslinking.
As a further improvement of the invention, the copper conductor is formed by twisting 19 copper wires.
As a further improvement of the invention, the flame-retardant inner sheath layer is made of cross-linked polyolefin.
The invention has the beneficial effects that the flexibility of the copper wire can be improved and the resistance of the copper wire can be reduced by primary stretching and annealing and secondary annealing after stranding, and the flame-retardant standard of the A-type cable is met by adopting a multilayer structure design.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is further illustrated with reference to fig. 1.
A fire-retardant fire-resistant medium voltage cable of A class and its preparation method, including cable core 1, characterized by that: the cable core 1 becomes regular triangle and arranges, 1 central point of cable core puts and is provided with copper conductor 2, copper conductor 2 outside is provided with conductor shield 3, conductor shield 3 outside is provided with insulating layer 4, insulating layer 4 outside is provided with insulating shield 5, insulating shield 5 outside is provided with magnesium hydrate filling layer 6, magnesium hydrate filling layer 6 outside is provided with ceramic silastic-layer 7, ceramic silastic-layer 7 outside is provided with fire-retardant inner sheath 8, fire-retardant inner sheath 8 outside is provided with copper strips 9, copper strips 9 outside is provided with synthetic mica layer 10, synthetic mica layer 10 outside is provided with fire-retardant outer jacket 11.
The production method comprises the following steps: firstly, a drawing machine is utilized to draw a copper wire to a diameter meeting the design requirement, and a primary annealing furnace is used for continuously annealing the copper wire in the drawing process; secondly, forming copper conductors 2 by copper stranded wires meeting the size; thirdly, the bundled copper conductor 2 is placed in a secondary annealing furnace to be annealed for 3 hours at 950 ℃ and 1000 ℃; then, cable production was performed according to the cable production method.
Through primary stretching and annealing and secondary annealing after stranding, the flexibility of the copper wire can be improved, the resistance of the copper wire is reduced, and the flame-retardant standard of the A-type cable is met by adopting a multilayer structure design.
As a further preferable scheme of the invention, the insulating layer 4 is extruded by crosslinked polyethylene and then is subjected to irradiation crosslinking, so that the insulating layer has excellent fire-resistant and flame-retardant properties.
As a further preferable scheme of the present invention, the copper conductor 2 is formed by twisting 19 copper wires, and the copper wires have a lower calorific value by adopting a classical structural arrangement.
As a further preferable scheme of the invention, the flame-retardant inner sheath layer 8 is made of cross-linked polyolefin and has stronger protective performance.
Claims (4)
1. A flame-retardant fire-resistant medium voltage cable of A class and its preparation method, including cable core (1), characterized by that: the cable core (1) is arranged in a regular triangle, a copper conductor (2) is arranged in the center of the cable core (1), a conductor shielding layer (3) is arranged outside the copper conductor (2), an insulating layer (4) is arranged outside the conductor shielding layer (3), an insulating shielding layer (5) is arranged outside the insulating layer (4), a magnesium hydroxide filling layer (6) is arranged outside the insulating shielding layer (5), a ceramic silicon rubber layer (7) is arranged outside the magnesium hydroxide filling layer (6), a flame-retardant inner protection layer (8) is arranged outside the ceramic silicon rubber layer (7), a copper strip (9) is arranged outside the flame-retardant inner protection layer (8), a synthetic mica layer (10) is arranged outside the copper strip (9), and a flame-retardant outer protection layer (11) is arranged outside the synthetic mica layer (10).
The production method comprises the following steps: firstly, a drawing machine is utilized to draw a copper wire to a diameter meeting the design requirement, and a primary annealing furnace is used for continuously annealing the copper wire in the drawing process; secondly, stranding copper wires meeting the size into a copper conductor (2); thirdly, the bundled copper conductor (2) is placed in a secondary annealing furnace to be annealed for 3 hours at 950 ℃ and 1000 ℃; then, cable production was performed according to the cable production method.
2. The class-A flame-retardant and fire-resistant medium voltage cable and the production method thereof according to claim 1, wherein: the insulating layer (4) is extruded by crosslinked polyethylene and then is subjected to irradiation crosslinking.
3. The class-A flame-retardant and fire-resistant medium voltage cable and the production method thereof according to claim 1, wherein: the copper conductor (2) is formed by twisting 19 copper wires.
4. The class-A flame-retardant and fire-resistant medium voltage cable and the production method thereof according to claim 1, wherein: the flame-retardant inner protective layer (8) is made of cross-linked polyolefin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910144952.3A CN111627608A (en) | 2019-02-27 | 2019-02-27 | A-type flame-retardant fire-resistant medium-voltage cable and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910144952.3A CN111627608A (en) | 2019-02-27 | 2019-02-27 | A-type flame-retardant fire-resistant medium-voltage cable and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111627608A true CN111627608A (en) | 2020-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910144952.3A Pending CN111627608A (en) | 2019-02-27 | 2019-02-27 | A-type flame-retardant fire-resistant medium-voltage cable and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111627608A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894627A (en) * | 2010-06-30 | 2010-11-24 | 江苏东旭电缆有限公司 | High-flexibility rubber-sheathed cable |
| CN203276947U (en) * | 2013-04-11 | 2013-11-06 | 安徽海纳电缆集团有限公司 | Environmentally friendly low-smoke halogen-free flame-retardant fireproof medium-voltage power cable |
| CN208400602U (en) * | 2018-03-08 | 2019-01-18 | 大连可普乐电缆集团有限公司 | Fire-resisting cable is pressed in a kind of high fire-retardance minerals refuge floor |
-
2019
- 2019-02-27 CN CN201910144952.3A patent/CN111627608A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894627A (en) * | 2010-06-30 | 2010-11-24 | 江苏东旭电缆有限公司 | High-flexibility rubber-sheathed cable |
| CN203276947U (en) * | 2013-04-11 | 2013-11-06 | 安徽海纳电缆集团有限公司 | Environmentally friendly low-smoke halogen-free flame-retardant fireproof medium-voltage power cable |
| CN208400602U (en) * | 2018-03-08 | 2019-01-18 | 大连可普乐电缆集团有限公司 | Fire-resisting cable is pressed in a kind of high fire-retardance minerals refuge floor |
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20200904 |