CN101281798A - Insulation material for cable and wire of nuclear power plant - Google Patents
Insulation material for cable and wire of nuclear power plant Download PDFInfo
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- CN101281798A CN101281798A CNA2008100623153A CN200810062315A CN101281798A CN 101281798 A CN101281798 A CN 101281798A CN A2008100623153 A CNA2008100623153 A CN A2008100623153A CN 200810062315 A CN200810062315 A CN 200810062315A CN 101281798 A CN101281798 A CN 101281798A
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- nuclear power
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- power plant
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Abstract
The present invention relates to the technical domain of insulating materials, i.e., an insulating material for cables and wires for nuclear power stations, which is made in the following parts of raw materials by weight: ethylene-propylene rubber: 100, fire retarding agent: 120-140, antioxidant agent: 2-4, anti-irradiation agent: 9-24, lubricant: 2-6, cross-linking agent: 3-5, activating agent: 5-9, and anti-aging agent: 0.1-0.15. The advantages of the insulating material include: the insulating material is modified with ethylene-propylene rubber, and ingredients that meet the requirements of cables and wires for nuclear applications, such as anti-irradiation, fire retarding agent, etc., are added; therefore, the insulating material is characterized in high radiation resistance, flame resistance, aging resistance, high electrical performance, free of halogen, low fume, low toxicity, environmental protection, free of pollution, and stable product performance, with a service life longer than 60 years, and can be widely used as an insulating material for cables and wires for nuclear power stations.
Description
Technical field
The present invention relates to the insulating material technical field, refer in particular to and be used for the insulating material that the electric wire in the nuclear power plant reactor containment is used.
Background technology
The nuclear island of nuclear power station cable requires cable insulation material must have excellent heat aging property, radiation hardness ageing properties, fire resistance, wet-hot aging performance etc.Under nuclear environment, the cable of normal operation need stand γ, Beta-ray irradiation, and possesses the requirement of the normal operation of maintenance cable under accident conditions.Since the general polymerization thing under effect of irradiation, produces ionization or excite etc. react after, following chemical reaction further takes place: the degradation reaction of the big intermolecular cross-linking reaction that is caused by irradiation, irradiation initiation, oxidation reaction, generation gaseous product, other is as isomerization etc., these are reflected at the degree difference that takes place under the different reaction rates, final result is that the molecular weight of polymeric material is more and more little, even loses the character of polymer.Insulating material commonly used at present is cross-linked polyolefin and ethylene-propylene rubber material, by our improvement, heat aging performance, gamma ray resistant ability, anti-ozone, weather and the electrical property of the ethylene-propylene rubber of acrylate modification is improved greatly.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, provides to surpass the cable insulation material against nuclear circumstance in 60 years in a kind of anti-irradiation, good electric property, low smoke, zero halogen low toxicity, fire-retardant, useful life.
The technical scheme that technical solution problem of the present invention is adopted is:
Insulation material for cable and wire of nuclear power plant is to form by the following materials based on weight proportioning:
Ethylene-propylene rubber: 100, fire retardant: 120～140,
Antioxidant: 2～4, anti-irradiation agent: 9～24,
Lubricant: 2～6, crosslinking agent: 3～5,
Activating agent: 5～9, age resistor: 0.1～0.15.
Above-mentioned ethylene-propylene rubber is the copolymer of ethylene-propylene diene copolymer and acrylate, or the copolymer of ethylene-propylene diene copolymer and binary second third glue.
Above-mentioned fire retardant is the mixture of aluminium hydroxide, magnesium hydroxide and antimonous oxide, and mixed proportion is 1: 0.4～0.6: 0.2.
Above-mentioned antioxidant is 2 mercapto benzimidazole (molecular formula: C7H6N2S) with four seasons Doutrate (molecular formula: C
73H
108O
12) mixture, mixed proportion is 1: 0.1.
Above-mentioned anti-irradiation agent is a boronating agent.
Above-mentioned lubricant is a paraffin wax.
Above-mentioned crosslinking agent is a cumyl peroxide (molecular formula: C18H22O2).
Above-mentioned activating agent is a thiuram (molecular formula: C6H12N2S4) or zinc oxide (molecular formula: ZnO).
Above-mentioned age resistor is a how phenol (molecular formula: C of p-phenylenediamine (PPD) two
26H
20N
2).
Compared with prior art, advantage of the present invention is mainly reflected in:
The present invention is by the modification of ethylene-propylene rubber, add the various materials of satisfied nuclear level such as anti-irradiation agent, fire retardant cable requirement, make product have combination properties such as excellent anti-irradiation, fire-retardant, heat-resistant aging, good electric property, low smoke, zero halogen low toxicity, environment friendly and pollution-free, properties of product are stable, life-span reached more than 60 years, can be widely used as the insulating material of cables of nuclear power.
Through check, the performance index of product each side are as shown in the table:
| Sequence number | Project name | Unit | Representative value |
| 1 | Hot strength | MPa | 12 |
| 2 | Elongation at break | ％ | 420 |
| 3 | 20 ℃ of insulation resistance constants: minimum | MΩ·km | 4900 |
| 4 | 150 ℃/30 days heat ageing after-drawing change rate of strength elongation at break rates of change | ％ ％ | 13 -13 |
| 5 | Oxygen index | ％ | 32 |
| 6 | Behind gamma-rays (200Mrad/70 ℃) irradiation |
| Elongation at break | ％ | 90 | |
| 7 | Insulation resistance constant minimum under 156 ℃ of 110 ℃ of * 30d of high temperature resistant damp and hot electric property hydrothermal aging insulation rate of change | ％ MΩ·km | -30 65 |
Comprehensive going up shown listed data as can be seen, insulating material can reach 90% through elongation at break behind 200Mrad/70 ℃ the gamma-ray irradiation, ethylene-propylene diene copolymer and Acrylate copolymer, irradiation additive and antioxidant are suppressed gamma-ray destruction effectively among the present invention, reduced the degree that power is damaged between polymer molecule, reduced the chain that Local C～the C key causes because of being stimulated fracture, made the speed of degraded retarded.Require insulating material can pass through single vertical combustion in the nuclear power station standard, the oxygen index of conventional second third glue down is about 18～30, adds 120～160 parts of fire retardants in second third glue to make the insulating material anti-flammability bring up to 35, has met the fire-retardant requirement that nuclear power station proposes.By adding antioxidant, the depolymerization reaction speed of polymer is obviously slowed down under nuclear environment among the present invention, and molecule carbonaceous residue chipping or that generate obviously reduces.Because the process of thermal degradation starts from other weak spot in molecular chain-end or the molecule, the monomer chain link that links to each other loses one by one, for control degradation speed, introduced effective free-radical acceptor, cut off free radical and generate new free radical as intermediate and polymer reaction, the ageing properties of material is improved significantly, calculate by the Arrhenius formula, the material aging performance reached more than 60 years.Insulating material is when design, consider simultaneously when having an accident (LOCA), electric wire is in than the irradiation of higher roentgen dose X under the normal running (operation) conditions and high temperature and high pressure steam and is subjected among the environment (LOCA test) that chemical agent sprays, under the LOCA test, the polymer in the insulating material must possess the acid and alkali resistance performance.Insulating material can be subjected to the infiltration in sheath from the acid ﹠ alkali liquid sheath, and acid under the HTHP, alkaline penetrant adhere to insulating surface, then at surface dissolution and to polymer internal migration or diffusion, until reaching Css.Also have certain mechanical performance and electrical property through LOCA test back insulating material, can effectively protect the safe operation of cable.
Embodiment
The present invention is described in further detail below in conjunction with concrete enforcement, so that advantage of the present invention is more obvious:
Raw material by weight is composed as follows:
Second third glue: ethylene-propylene diene copolymer and Acrylate copolymer: 100;
Fire retardant: the mixture of aluminium hydroxide, magnesium hydroxide and antimonous oxide: 100;
Antioxidant: the mixture of 2 mercapto benzimidazole and four seasons Doutrate: 4;
Anti-irradiation agent: boronating agent mixture: 16;
Lubricant: paraffin wax: 6;
Crosslinking agent: cumyl peroxide: 3;
Activating agent: zinc oxide: 4;
Age resistor: p-phenylenediamine (PPD) two is phenol how: 0.1.
Preparation process:
Second third glue of above-mentioned weighing was plasticated in banbury 1～2 minute, the fire retardant, antioxidant, anti-irradiation agent, lubricant, the activating agent that add above-mentioned weighing, mixing 20 minutes, temperature is controlled in 125 ℃, in filter rubber machine, filter, temperature is at 100～130 ℃, and the crosslinking agent, the age resistor that add above-mentioned weighing are mixing, rolles over page or leaf.The expressing technique parameter is as follows: steam pressure between 3 minutes 15 seconds to 4 minutes and 50 seconds: 1.2～1.9MPa, 30～80 ℃ of body temperatures, head temperature: 85～97 ℃ initial sulfuration (incipient scorch) time in the time of 163 ℃.
The present invention can not produce and burn phenomenon from 163 ℃ of cure times (time of scorch) 3 minutes and 37 seconds, and the process safety performance is guaranteed.
It is cited that raw material of the present invention constitutes all right according to the form below:
| Group | Second third glue | Fire retardant | Antioxidant | Anti-irradiation agent | Lubricant | Crosslinking agent | Activating agent | Age resistor |
| 1 | 100 | 140 | 2 | 10 | 6 | 5 | 9 | 0.1 |
| 2 | 100 | 124 | 2.7 | 12 | 4 | 4 | 7 | 0.15 |
| 3 | 100 | 130 | 4 | 20 | 2 | 3 | 5 | 0.1 |
Claims (9)
1, insulation material for cable and wire of nuclear power plant is characterized in that it being to form by the following materials based on weight proportioning:
Ethylene-propylene rubber: 100, fire retardant: 120～140,
Antioxidant: 2～4, anti-irradiation agent: 9～24,
Lubricant: 2～6, crosslinking agent: 3～5,
Activating agent: 5～9, age resistor: 0.1～0.15.
2, insulation material for cable and wire of nuclear power plant according to claim 1 is characterized in that described ethylene-propylene rubber is the copolymer of ethylene-propylene diene copolymer and acrylate, or the copolymer of ethylene-propylene diene copolymer and binary second third glue.
3, insulation material for cable and wire of nuclear power plant according to claim 1 is characterized in that described fire retardant is the mixture of aluminium hydroxide, magnesium hydroxide and antimonous oxide, and mixed proportion is 1: 0.4～0.6: 0.2.
4, insulation material for cable and wire of nuclear power plant according to claim 1 is characterized in that described antioxidant is 2 mercapto benzimidazole (molecular formula: C7H6N2S) with four seasons Doutrate (molecular formula: C
73H
108O
12) mixture, mixed proportion is 1: 0.1.
5, insulation material for cable and wire of nuclear power plant according to claim 1 is characterized in that described anti-irradiation agent is a boronating agent.
6, insulation material for cable and wire of nuclear power plant according to claim 1 is characterized in that described lubricant is a paraffin wax.
7, insulation material for cable and wire of nuclear power plant according to claim 1 is characterized in that described crosslinking agent is a cumyl peroxide (molecular formula: C18H22O2).
8, insulation material for cable and wire of nuclear power plant according to claim 1 is characterized in that described activating agent is a thiuram (molecular formula: C6H12N2S4) or zinc oxide (molecular formula: ZnO).
9, insulation material for cable and wire of nuclear power plant according to claim 1 is characterized in that described age resistor is a how phenol (molecular formula: C of p-phenylenediamine (PPD) two
26H
20N
2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100623153A CN101281798B (en) | 2008-05-08 | 2008-05-08 | Insulation material for cable and wire of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100623153A CN101281798B (en) | 2008-05-08 | 2008-05-08 | Insulation material for cable and wire of nuclear power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101281798A true CN101281798A (en) | 2008-10-08 |
| CN101281798B CN101281798B (en) | 2011-01-12 |
Family
ID=40014200
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100623153A Expired - Fee Related CN101281798B (en) | 2008-05-08 | 2008-05-08 | Insulation material for cable and wire of nuclear power plant |
Country Status (1)
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|---|---|
| CN (1) | CN101281798B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831115A (en) * | 2010-04-29 | 2010-09-15 | 江苏远洋东泽电缆股份有限公司 | Ethylene propylene rubber insulation material for longitudinal high-voltage watertight cable of ships and warships and production method thereof |
| CN101456992B (en) * | 2008-12-25 | 2011-03-16 | 临海市亚东特种电缆料厂 | Insulation material for nuclear power plant cable |
| CN103044786A (en) * | 2012-12-29 | 2013-04-17 | 山东美晨科技股份有限公司 | Ethylene propylene rubber with high temperature resistance and low compression deformation |
| CN103232642A (en) * | 2013-04-27 | 2013-08-07 | 深圳市沃尔核材股份有限公司 | Reactor flame-retardant heat-shrinkable tube meeting nuclear power station AP1000 design requirement |
| CN103819821A (en) * | 2014-02-20 | 2014-05-28 | 扬州曙光电缆股份有限公司 | Preparation method of cable insulation material used for AP1000 nuclear power station |
| CN105355308A (en) * | 2015-11-28 | 2016-02-24 | 国网河南省电力公司平顶山供电公司 | Power cable |
-
2008
- 2008-05-08 CN CN2008100623153A patent/CN101281798B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456992B (en) * | 2008-12-25 | 2011-03-16 | 临海市亚东特种电缆料厂 | Insulation material for nuclear power plant cable |
| CN101831115A (en) * | 2010-04-29 | 2010-09-15 | 江苏远洋东泽电缆股份有限公司 | Ethylene propylene rubber insulation material for longitudinal high-voltage watertight cable of ships and warships and production method thereof |
| CN103044786A (en) * | 2012-12-29 | 2013-04-17 | 山东美晨科技股份有限公司 | Ethylene propylene rubber with high temperature resistance and low compression deformation |
| CN103232642A (en) * | 2013-04-27 | 2013-08-07 | 深圳市沃尔核材股份有限公司 | Reactor flame-retardant heat-shrinkable tube meeting nuclear power station AP1000 design requirement |
| CN103232642B (en) * | 2013-04-27 | 2016-08-17 | 深圳市沃尔核材股份有限公司 | A kind of reactor fire retardant thermal shrinkage sleeve pipe meeting nuclear power station AP1000 design requirement |
| CN103819821A (en) * | 2014-02-20 | 2014-05-28 | 扬州曙光电缆股份有限公司 | Preparation method of cable insulation material used for AP1000 nuclear power station |
| CN105355308A (en) * | 2015-11-28 | 2016-02-24 | 国网河南省电力公司平顶山供电公司 | Power cable |
| CN105355308B (en) * | 2015-11-28 | 2017-05-10 | 国家电网公司 | Power cable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101281798B (en) | 2011-01-12 |
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| PB01 | Publication | ||
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| ASS | Succession or assignment of patent right |
Owner name: KAIKAI CABLES SCIENCE CO., LTD. Free format text: FORMER OWNER: YU JIYAN Effective date: 20090522 |
|
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| TA01 | Transfer of patent application right |
Effective date of registration: 20090522 Address after: Taizhou Province, Luqiao District, Zhejiang province Lo Yang Industrial Zone Code: 318050 Applicant after: Kaikai Cable Technology Co., Ltd. Address before: Zhejiang Taizhou District, Luqiao province Kai Yang Industrial Zone to open cable technology Co., Ltd., zip code: 319050 Applicant before: Yu Jiyan |
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Granted publication date: 20110112 Termination date: 20140508 |