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Processing technology of sheath material for severe cable of three-generation nuclear power plant

A technology of processing technology and sheathing material, which is applied in the field of processing technology of sheathing materials for harsh cables of third-generation nuclear power plants, can solve problems such as affecting product quality, poor process control, and generation of pores, and achieves overcoming mechanical properties and flame retardant properties. , Improve the dispersibility, reduce the effect of frictional heat generation

Inactive Publication Date: 2019-11-08
ANHUI CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, because the outer sheath layer is a halogen-free low-smoke flame-retardant radiation cross-linked polyolefin material, the material contains magnesium hydroxide, aluminum hydroxide and other flame retardants, and its density is relatively high. Friction generates a lot of heat, and poor process control can easily lead to pores after extrusion, which affects product quality

Method used

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  • Processing technology of sheath material for severe cable of three-generation nuclear power plant

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Effect test

Embodiment 1

[0023] The processing technology of a kind of sheathing material for harsh cables of third-generation nuclear power plants proposed by the present invention comprises the following steps:

[0024] S1. Add 2 parts of α-zirconium phosphate into water, ultrasonically disperse for 20 minutes, then add 3 parts of zinc stannate hydrate, 0.8 parts of zinc oxide, 3.2 parts of sodium hydroxide and 7 parts of urea, ultrasonically, and stir the reaction at 70°C 5h, filter with suction, azeotropically distill the filter cake and n-butanol, dry, then mix with 4 parts of magnesium hydroxide, add to 90% ethanol solution, ultrasonically disperse, then add vinyltrimethoxysilane, at 40°C Stir and react for 3 hours, filter, and dry to obtain a composite flame retardant;

[0025] S2, get 30 parts of ethylene-vinyl acetate copolymer, 70 parts of low-density polyethylene, 1 part of antioxidant RD, 10242 parts of antioxidant, 1.5 parts of ultraviolet absorber UV-234, 2.5 parts of ultraviolet absorbe...

Embodiment 2

[0031] The processing technology of a kind of sheathing material for harsh cables of third-generation nuclear power plants proposed by the present invention comprises the following steps:

[0032]S1. Add 5 parts of α-zirconium phosphate into water, ultrasonically disperse for 30 minutes, then add 3.5 parts of zinc stannate hydrate, 1.3 parts of zinc oxide, 3.8 parts of sodium hydroxide and 8 parts of urea, ultrasonically, and stir at 80°C for reaction 6h, filter with suction, azeotropically distill the filter cake and n-butanol, dry, then mix with 7 parts of magnesium hydroxide, add to 90% ethanol solution, ultrasonically disperse, then add vinyltriethoxysilane, at 50 Stir and react at ℃ for 5 hours, filter and dry to obtain a composite flame retardant;

[0033] S2, get 40 parts of ethylene-vinyl acetate copolymer, 60 parts of low-density polyethylene, 2 parts of antioxidant RD, 10241 parts of antioxidant, 2.5 parts of ultraviolet absorber UV-234, 1.5 parts of ultraviolet abso...

Embodiment 3

[0039] A kind of processing technology of the sheathing material for severe cables of third-generation nuclear power plants proposed by the present invention is characterized in that it comprises the following steps:

[0040] S1. Add 3 parts of α-zirconium phosphate into water, ultrasonically disperse for 25 minutes, then add 3.2 parts of zinc stannate hydrate, 1 part of zinc oxide, 3.5 parts of sodium hydroxide and 7.4 parts of urea, ultrasonically, and stir at 75°C for reaction 5h, filter with suction, azeotropically distill the filter cake and n-butanol, dry, then mix with 5.4 parts of magnesium hydroxide, add to 90% ethanol solution, ultrasonically disperse, then add vinyltrimethoxysilane, at 40°C Stir and react for 3.5 hours, filter, and dry to obtain a composite flame retardant;

[0041] S2, get 35 parts of ethylene-vinyl acetate copolymer, 65 parts of low-density polyethylene, 1.5 parts of antioxidant RD, 1.5 parts of antioxidant 1024, 2 parts of ultraviolet absorber UV...

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Abstract

The invention discloses a processing technology of a sheath material for a severe cable of a three-generation nuclear power plant, and relates to the technical field of nuclear cables. The processingtechnology comprises the following steps: preparing a composite flame retardant, pre-heating raw materials, and adding an ethylene-vinyl acetate copolymer and a low density polyethylene into an open mill for mixing to obtain a material a; adding an antioxidant RD, an antioxidant 1024, a ultraviolet absorber UV-234, a ultraviolet absorber UV-328, stearic acid, ferrocene, boron nitride, and 27-35% of a total amount of the composite flame retardant into another open mill for mixing to obtain a material b; adding the material b, paraffin oil, and a crosslinking sensitizer into the material a for mixing, and adding the remaining composite flame retardant in two times for mixing to obtain a material c; and transferring the material c into a twin-screw extruder for mixing granulation, then performing extrusion by a single-screw extruder, and performing irradiation crosslinking to obtain the sheath material. The sheath material prepared by the processing technology has good mechanical properties, flame retardancy, aging resistance and radiation resistance, and a service life can be up to 60 years or more at 90 DEG C.

Description

technical field [0001] The invention relates to the technical field of nuclear cables, in particular to a processing technology for sheathing materials for severe cables used in third-generation nuclear power plants. Background technique [0002] As a new generation of energy, nuclear energy has many advantages that cannot be compared with other energy sources. Not only will it not cause damage to the environment, but the energy density of nuclear fuel is several million times higher than that of fossil fuels, and transportation and storage are very convenient. Therefore, the construction of nuclear power plants is very important for our country. It is very necessary and has a bright future. With the increasing development of today's society, our country is also facing the situation of increasing scarcity of coal, oil, natural gas and other energy fuels. Nuclear energy, as an efficient and clean energy, not only has obvious safety, stability and environmental protection The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L91/06C08K13/06C08K9/06C08K3/38C08K5/09C08K3/32C08K3/22C08K3/24C08K5/56
CPCC08K2003/2224C08K2003/2296C08K2003/328C08K2003/385C08L23/06C08L2201/02C08L2201/08C08L2203/202C08L2205/03C08L2207/062C08L23/0853C08L91/06C08K13/06C08K9/06C08K3/38C08K5/09C08K3/32C08K3/22C08K3/24C08K5/56
Inventor 周俊夏候东宰学龙韩俊宝徐晓丽朱元忠陶恒莹
Owner ANHUI CABLE
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