Insulation flame-retardant and fireproof power cable for nuclear power plant and fabrication method of power cable

A technology for power cables and nuclear power plants, which is applied in the field of insulating, flame-retardant and fire-resistant power cables for nuclear power plants and their preparation, can solve the problem that the γ-ray resistance and mechanical properties need to be improved, and the normal operation of the cables cannot be effectively guaranteed, and the high temperature resistance and fire resistance limit are low. and other problems to achieve the effect of reducing noise pollution, preventing internal fire, and improving fire protection

Inactive Publication Date: 2018-03-13
SICHUAN WEIKE CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used insulating materials are cross-linked polyolefin and ethylene-propylene rubber materials. However, their gamma-ray resistance and mechanical properties need to be improved, which is far from meeting the working requirements.
At the same time, although the existing cables, although their sheath and insulation layer burn slowly when resisting flames and high temperatures, their high temperature resistance and fire resistance limit are still low. Although they can delay the speed of fire impact to a certain extent, they are still not effective. Ensure the normal operation of the cable under high temperature and fire, especially for the use of nuclear power plants, once the emergency equipment for fire, earthquake and other disasters cannot operate, it will bury a huge safety hazard

Method used

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  • Insulation flame-retardant and fireproof power cable for nuclear power plant and fabrication method of power cable
  • Insulation flame-retardant and fireproof power cable for nuclear power plant and fabrication method of power cable
  • Insulation flame-retardant and fireproof power cable for nuclear power plant and fabrication method of power cable

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preparation example Construction

[0026] The preparation method of the insulating, flame-retardant and fire-resistant power cable for nuclear power plants of the present invention comprises the following steps:

[0027] a. Draw and anneal the round metal wire to make a conductor, dip the conductor in insulating varnish, and then extrude the insulation layer outside the conductor to form the insulated core 7. After the multiple insulated cores 7 are twisted together, A layer of rock wool fiber 8 is coated on the outside to form a cable core.

[0028]b. Wrap the shielding layer 1 outside the cable core, then wrap the polyester tape around the shielding layer 1 to form a polyester tape reinforcement layer 2, and then wrap the mica tape around the polyester tape reinforcement layer 2 to form a fire-resistant mica tape Layer 3.

[0029] c. Preparation of the inner sheath layer 4: first prepare the raw materials according to the weight, and pass the phenolic resin through a crusher to make phenolic resin particles ...

Embodiment 1

[0033] Insulated flame-retardant and fire-resistant power cables for nuclear power plants prepared by the above method, the radiation-resistant layer 6 is made of the following raw materials in parts by weight: 80 parts of polyvinyl chloride, 90 parts of polypropylene, 20 parts of polycarbonate, and 40 parts of phenolic resin , 40 parts of epoxy resin, 20 parts of polydimethylsiloxane, 10 parts of polyvinylpyrrolidone, 5 parts of decabromodiphenylethane, 5 parts of decabromodiphenyl ether, 18 parts of stearic acid, hydroxyethyl cellulose 8 parts of plain fiber, 8 parts of long glass fiber, 5 parts of aluminum tripolyphosphate, 4 parts of silicon nitride, 4 parts of borax, 5 parts of sodium succinate, and 3 parts of silica gel.

[0034] The inner sheath layer 4 is made of the following raw materials in parts by weight: 40 parts of phenolic resin, 20 parts of magnesium hydroxide, 30 parts of polypropylene, 2 parts of melamine cyanurate, 5 parts of fumed silica, Ca / Zn 5 parts of ...

Embodiment 2

[0036] Insulated flame-retardant and fire-resistant power cables for nuclear power plants prepared according to the above method, the radiation-resistant layer 6 is made of the following raw materials in parts by weight: 95 parts of polyvinyl chloride, 95 parts of polypropylene, 25 parts of polycarbonate, and 45 parts of phenolic resin , 45 parts of epoxy resin, 23 parts of polydimethylsiloxane, 15 parts of polyvinylpyrrolidone, 8 parts of decabromodiphenylethane, 8 parts of decabromodiphenyl ether, 20 parts of stearic acid, hydroxyethyl cellulose 9 parts of plain fiber, 10 parts of long glass fiber, 6 parts of aluminum tripolyphosphate, 5 parts of silicon nitride, 5 parts of borax, 5 parts of sodium succinate, and 3 parts of silica gel.

[0037] The inner sheath layer 4 is made of the following raw materials in parts by weight: 50 parts of phenolic resin, 30 parts of magnesium hydroxide, 45 parts of polypropylene, 4 parts of melamine cyanurate, 7 parts of fumed silica, Ca / Zn ...

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Abstract

The invention relates to the technical field of a cable and aims to provide an insulation flame-retardant and fireproof power cable for a nuclear power plant and a fabrication method of the power cable. By the insulation flame-retardant and fireproof power cable, the properties of radiation resistance and high-temperature resistance can be improved, and the safety of the cable is improved. The insulation flame-retardant and fireproof power cable for the nuclear power plant comprises a cable core, a shielding layer, a polyester belt reinforcement layer, a fireproof mica belt layer, an internalsheath layer, a high-temperature resistant protection layer and a radiation resistant layer which are sequentially arranged from inside to outside, wherein the cable core comprises a plurality of insulation wire cores which are uniformly distributed, a rock cotton fiber is filled between the insulation wire cores and the shielding layer, and the high-temperature resistant protection layer comprises pot clay which is filled between the radiation resistant layer and the internal shielding layer and is easy to sinter. By the insulation flame-retardant and fireproof power cable, the properties ofradiation resistance and high-temperature resistance can be improved, and the safety of the cable is improved.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to an insulating, flame-retardant and fire-resistant power cable for nuclear power plants and a preparation method thereof. Background technique [0002] At present, the nuclear island cables of nuclear power plants are required to have excellent properties such as radiation resistance, good insulation performance, and high strength due to their special working environment. However, the existing nuclear island cables of nuclear power plants are prone to aging and damage in high radiation environments. The service life is relatively short, and the anti-interference ability is relatively weak, which brings safety hazards to normal operations. Especially in a nuclear environment, cables in normal operation must be irradiated by gamma and beta rays, and have the requirement to keep cables in normal operation in case of accidents. After the ionization or excitation of general polymers un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/28H01B7/29H01B13/02H01B13/16H01B13/22C08L27/06C08L23/12C08L69/00C08L61/06C08L63/00C08L83/04C08L39/06C08L1/28C08K13/04C08K7/14C08K5/03C08K5/09C08K3/34C08K3/38C08L27/18C08K13/02C08K3/22C08K5/3492C08K3/36C08K5/098
CPCH01B7/28C08K2003/2224C08K2003/387C08L23/12C08L27/06C08L61/06C08L2201/02C08L2201/08C08L2203/202C08L2205/035H01B7/29H01B13/02H01B13/16H01B13/22C08L69/00C08L63/00C08L83/04C08L39/06C08L1/284C08K13/04C08K7/14C08K5/03C08K5/09C08K3/34C08K3/38C08L27/18C08K13/02C08K3/22C08K5/34924C08K3/36C08K5/098C08K3/2279
Inventor 林奎李文超胡德琼谢德军
Owner SICHUAN WEIKE CABLE CO LTD
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