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Medium-voltage fire-resistant power cable

A power cable and fire-resistant technology, applied in the field of medium-voltage fire-resistant power cables, can solve the problems of inability to continuously produce large lengths, complicated cable production processes, and production process limitations, and achieve safe and reliable operation, good flame retardancy, and improved voltage levels. Effect

Inactive Publication Date: 2018-01-09
JIANGSU PUCAO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of the cable is complicated, and limited by the production process, it cannot be produced continuously in large lengths. Small-sized cables can be produced for more than 100 meters at a time, and large-sized cables can only be produced for tens of meters at a time.

Method used

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  • Medium-voltage fire-resistant power cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A medium-voltage fire-resistant power cable provided in this embodiment has a structure such as figure 1 As shown, including the cable core, the cable core is twisted by three wire cores, and the wire cores are closely arranged and twisted along the circumferential direction. The wire core is composed of conductor 1 and the shielding layer 2, insulating layer 3, and insulation The shielding layer consists of 4, of which:

[0063] The conductor 1 is formed by twisting several copper core conductors, the shielding layer 2 is arranged outside the conductor 1, the insulating layer 3 is arranged outside the shielding layer 2, and the insulating layer 3 is also provided with a heat insulation layer 5, and the heat insulation layer 5 is arranged outside the shielding layer 2. An insulating shielding layer 4 is provided, and a metal shielding layer 6 is wrapped around the insulating shielding layer 4, and a refractory layer 7 is arranged outside the metal shielding layer 6;

...

Embodiment 2

[0069] This embodiment provides the composition of the flame-retardant tape and the heat-insulating and cooling layer in Embodiment 1, specifically:

[0070] The flame retardant tape includes the following components in parts by mass:

[0071] Polyvinyl chloride: 15 parts, bromocarbon polyurethane resin: 10 parts, zinc borate modified phenolic resin: 15 parts, mica: 1 part, methylphenyldiethoxysilane: 7 parts, modified magnesium hydroxide: 5 parts Parts, chlorinated paraffin: 1 part, zinc borate: 3 parts, aluminum hydroxide: 2 parts, hexamethylcyclotrisilazane: 2 parts, glass flake: 1 part, tris(2,4-di-tert-butyl Phenyl) phosphite: 3 parts, modified vermiculite powder: 1 part, silicone oil: 4 parts, filler: 0.5 part;

[0072] The filler contains the following components by mass percentage: Y: 9%, Sc: 30%, Gd: 18%, Sm: 8%, Pr: 13%, and the balance La, which is the sum of the above components is 100%;

[0073]The specific production of modified magnesium hydroxide is as follow...

Embodiment 3

[0080] This embodiment provides the composition of the flame-retardant tape and the heat-insulating and cooling layer in Embodiment 1, specifically:

[0081] The flame retardant tape includes the following components in parts by mass:

[0082] Polyvinyl chloride: 18 parts, bromocarbon polyurethane resin: 13 parts, zinc borate modified phenolic resin: 20 parts, mica: 5 parts, methylphenyldiethoxysilane: 10 parts, modified magnesium hydroxide: 8 Parts, chlorinated paraffin: 3 parts, zinc borate: 6 parts, aluminum hydroxide: 4 parts, hexamethylcyclotrisilazane: 5 parts, glass flakes: 3 parts, tris(2,4-di-tert-butyl Phenyl) phosphite: 5 parts, modified vermiculite powder: 3 parts, silicone oil: 7 parts, filler: 1 part;

[0083] The filler contains the following components by mass percentage: Y: 11%, Sc: 38%, Gd: 20%, Sm: 10%, Pr: 15%, and the balance La, which is the sum of the above components is 100%;

[0084] The specific production of modified magnesium hydroxide is as follo...

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Abstract

The invention discloses a medium-voltage fire-resistant power cable, which comprises a cable core, wherein the cable core is formed by twisting a plurality of wire cores; each wire core comprises a conductor, a shielding layer, an insulating layer and an insulating shielding layer; the shielding layers, insulating layers and the insulating shielding layer are arranged outside the corresponding conductors; each conductor is formed by twisting a plurality of copper core conductors; a thermal insulating layer is also arranged outside each insulating layer; one insulating shielding layer is arranged outside each thermal insulating layer; a metal shielding layer wraps the outside of each insulating shielding layer; a fire-resistant layer is arranged outside each metal shielding layer; the partsamong the plurality of wire cores are filled with fillers; a ceramic fiber tape, an adiabatic cooling layer, a steel tape firestop layer, an oxygen barrier layer, an inner sheath and an outer sheathwrap the outside of the cable core; and the outer sheath wraps the inner sheath through a lubricating layer. The medium-voltage fire-resistant power cable is simple in structure, and has good flame retardant property and fire resistance; the voltage level of the cable is improved on the basis of ensuring the flexibility and the large-length processing performance of the cable; and safe and reliable operation of a power system is ensured.

Description

technical field [0001] The invention relates to a cable, in particular to a medium-voltage fire-resistant power cable. Background technique [0002] The development process of fire-resistant cables in China is quite tortuous. There are disputes from the beginning of the term. The design and disaster relief departments named this type of product "fire-resistant cable", and the manufacturing department named it "fire-resistant cable". The complete term of the IEC standard should be "" The term "cable that burns under flame conditions and requires the integrity of the line" is too long, and "fire-resistant cable" has become a commonly used term over time, but the debate between "fire-resistant" and "fireproof" has not yet been resolved, regardless of the wording. , the requirements for flame regulations, burning time and circuit integrity are the essential issues of fire-resistant cables. The limited simulation test is only a relative comparison. Which kind of cable can ensure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/18H01B7/02H01B7/22H01B7/295H01B3/44H01B3/42
Inventor 芮黎春
Owner JIANGSU PUCAO TECH CO LTD
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