CN105255022B - For the semiconductive ethylene propylene diene monomer (EPDM) material and preparation method of high-voltage direct-current cable accessory - Google Patents
For the semiconductive ethylene propylene diene monomer (EPDM) material and preparation method of high-voltage direct-current cable accessory Download PDFInfo
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- CN105255022B CN105255022B CN201510746373.8A CN201510746373A CN105255022B CN 105255022 B CN105255022 B CN 105255022B CN 201510746373 A CN201510746373 A CN 201510746373A CN 105255022 B CN105255022 B CN 105255022B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08L2203/20—Applications use in electrical or conductive gadgets
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The present invention provides a kind of semiconductive ethylene propylene diene monomer (EPDM) materials and preparation method for high-voltage direct-current cable accessory, this is used for the semiconductive ethylene propylene diene monomer (EPDM) material of high-voltage direct-current cable accessory, using ethylene propylene diene rubber as base-material, add in conductive filler, oxidant, vulcanizing agent, anti-aging agent, operation oil, other rubber and nano modified material mixing and vulcanize.The beneficial effects of the invention are as follows：The present invention proposes a kind of novel for the semiconductive material formula of high-voltage direct-current cable accessory and its preparation scheme, by adding nanometer silicon carbide and nano-graphite in semiconductive material such as ethylene propylene diene monomer (EPDM) material, using the conductivity of nano modification means regulation and control semiconductive ethylene propylene diene rubber, its material character is made to change, conductivity can be controlled in a rational range during D.C. high voltage transmission, it is ensured that HVDC transmission line and its cable accessory are safe and reliable.
Description
Technical field
The present invention relates to the semiconductive ethylene propylene diene rubbers of semiconductive material, more particularly, to high-voltage direct-current cable accessory
Material and preparation method.
Background technology
D.C. high voltage transmission has many advantages, such as that line loss is small, transmission capacity is big, operation stability is high, is mainly used for long distance
From large capacity transmission, remote submarine cable or big city buried cable power transmission, distribution network etc., at present increasingly by state
Interior attention.But compared to more ripe high-voltage AC transmission, the application of D.C. high voltage transmission is by cable accessory state-of-art
Limitation.
Semi-conductive rubber material in high voltage electric transmission cable attachment is in high voltage environment in application, can optimize electric field point
Cloth mitigates the phenomenon that high pressure part electric field strength is concentrated, and reduction operation troubles probability is cable and its attachment in high voltage power transmission mistake
The critical component as homogenizing cable accessory electric field in journey, can properly improve metallic shield (or sheath) gap and line
Core continues the electric field at place so that the uniform reasonable layout of field strength of cable accessory, so as to greatly reduce near metal screen layer
Electric field is concentrated, and prevents cable accessory breakdown, therefore can its performance reach that requirement is most important, this is related to cable accessory
Practical effect.
The semiconductive material of high-voltage alternating cable accessory mainly uses silastic material and ethylene propylene diene monomer (EPDM) material at present.
Traditional cable accessory is under AC field, and electric field, which is distributed, depends primarily on the dielectric constant of Rubber Media, and dielectric constant
It is varied less with temperature, electric field and frequency, but under DC electric field, electric field is distributed the conductance for depending primarily on material
Rate, and conductivity with temperature, electric field variation clearly, sometimes can reach several orders of magnitude difference.And the half of cable accessory
The conductivity variations of conductive material are homogenized the effect of electric field distribution by it is weakened significantly, and the electric field of cable accessory is caused to be distributed significantly
Change, the electric field strength at insulating layer outer diameter is made to substantially exceed the normal work field strength that design allows, cable accessory is caused to make
With breakdown in the process.Therefore, in the development process of high-voltage direct-current cable accessory, how to reduce the conductivity of semiconductive material
It is influenced by temperature, electric field, its conductance property is made not occur significantly becoming D.C. high voltage transmission safety in the transition of the order of magnitude
Stable key element.
Patent 1, a kind of CN102942792A movable type cable semi-conductive silicone rubber shielding materials and preparation method thereof；Specially
A kind of high dielectric constant silastics of 2, CN102504540A of profit and preparation method thereof.
Silicon rubber and ethylene propylene diene rubber injection moulding are mainly used applied to the semiconductive material of cable accessory at present, such as
Stress cone, stress tube etc., and be mainly used in high-voltage AC transmission system.As the country starts using high-voltage dc transmission in recent years
Electricity since direct current transportation is different from requirement of the ac transmission to APPENDIX MATERIALSThe attribute, leads to many in high-voltage AC transmission system
The attachment of middle energy applications well is not suitable for HVDC transmission system.
Patent described in patent 1 refers to a kind of movable type cable semi-conductive silicone rubber shielding material and its preparation side
Method, is based primarily upon that silicon rubber plasticity is high, pliability is good, as the basis material of semi-conductive shielding material, can avoid because of conductive charcoal
It is black structural strong and the drawbacks of film is caused to be hardened so that semi-conductive shielding material has good production and processing performance etc.
Aspect factor considers.
Described in patent 2 is a kind of high dielectric constant silastic and preparation method thereof, is handed over from D.C. high voltage transmission and high pressure
From the point of view of stream transmission of electricity is to the attribute specification of material, the material prepared is primarily upon improving the dielectric constant of material for being homogenized high pressure
The electric field of ac transmission, and for requirement of the direct current transportation to material electric conductivity, it is significantly impracticable to prepare scheme.
To sum up, if by existing semiconductive material for HVDC transmission system, since temperature, electric field lead to material
Conductivity changes, and influences DC high-voltage cable fittings electric field and is evenly distributed with ability.
D.C. high voltage transmission is mainly used for long-distance and large-capacity power transmission, power system interconnection, remote submarine cable or big
The direct current transportation etc. of Urban Underground cable power transmission, distribution network, since transmission line loss is small, transmission distance is unrestricted
The advantages that system, transmission capacity is big, power grid can be achieved asynchronous interconnection, it will had been more and more widely used in power transmission network.Directly
Stream transmission of electricity cooperates with ac transmission, forms modern electric Transmission system.
High-voltage direct-current cable accessory is indispensable key element during D.C. high voltage transmission, state-of-art
Directly affect the safety and stability of D.C. high voltage transmission.However, D.C. high voltage transmission is not promoted use always, this be because
For under DC high voltage, the Problems of The Electric Field of direct current cables attachment is more complicated, easily accumulation space charge in cable insulation,
Insulating layer internal field is caused to distort, reaches 7~8 times of normal work field strength, the breakdown of insulation may be caused, therefore need to use
Semi-conductive rubber material is made specific shape such as stress cone, stress tube etc. and the electric field of cable accessory is homogenized.But
Under DC electric field, electric field is distributed the conductivity for depending primarily on material, and conductivity is very bright with the variation of temperature, electric field
It is aobvious, the difference of several orders of magnitude can be reached sometimes, and the variation of material electric conductivity can influence stress cone and stress tube homogenizing electric field
Ability causes the effect for being homogenized electric field to be affected.Therefore, if in HVDC transmission system cable accessory semiconductive material
Material still use ac high-voltage transmission of electricity material, can cause its be homogenized electric field it is less able, and with usage time extend and
Environment temperature increases, and cable accessory punch-through easily occurs.
Invention content
In order to solve the problems in the prior art, the present invention provides a kind of semiconductives for high-voltage direct-current cable accessory
Ethylene propylene diene monomer (EPDM) material using the conductivity of nano modification means regulation and control semiconductive ethylene propylene diene rubber, makes its material character
It changes, can control conductivity in a rational range during D.C. high voltage transmission.
The present invention provides a kind of semiconductive ethylene propylene diene monomer (EPDM) material for high-voltage direct-current cable accessory, with ternary second
Third rubber is base-material, adds in conductive filler, oxidant, vulcanizing agent, anti-aging agent, operation oil, other rubber and nano modification material
Material, which is kneaded, to be vulcanized；The specific material mixture ratio of semiconductive ethylene propylene diene monomer (EPDM) material is measured with parts by weight, and proportioning is as follows：
120 parts of ethylene-propylene-diene monomer rubber base, 80~100 parts of conductive filler, 5~10 parts of oxidant, 1~5 part of vulcanizing agent, operation oil are 10
~20 parts, other rubber are 1~5 part, and nano modified material is 15~30 parts, and the anti-aging agent is 1 to 5 part.
As a further improvement on the present invention, the nano modified material for nanometer silicon carbide, nano-graphite one kind or
Two kinds.
As a further improvement on the present invention, the conductive filler is one in acetylene carbon black, carbon fiber, superconductive carbon black
Kind or it is several, the oxidant be magnesia and zinc oxide in one kind, the vulcanizing agent be DCP vulcanizing agents, selected anti-aging agent
For antioxidant NBC, the operation oil selection naphthene base crude oil.
As a further improvement on the present invention, the relative density of the naphthene base crude oil is 0.7~1.0, molecular weight for 550~
750, viscosity-gravity constant is 0.75~0.85.
As a further improvement on the present invention, 100 parts of ethylene propylene diene rubber, 100 parts of acetylene carbon black, 6 parts of zinc oxide, DCP
1 part of vulcanizing agent, 3 parts of antioxidant NBC, 20 parts of naphthene base crude oil, 20 parts of fume colloidal silica, 20 parts of nanometer silicon carbide, nano-graphite 5
Part, 2 parts of other rubber.
As a further improvement on the present invention, 110 parts of ethylene propylene diene rubber, 90 parts of acetylene carbon black, 6 parts of magnesia, DCP sulphur
1 part of agent, 3 parts of antioxidant NBC, 20 parts of naphthene base crude oil, 20 parts of fume colloidal silica, 15 parts of nanometer silicon carbide, nano-graphite 10
Part, 2 parts of other rubber.
As a further improvement on the present invention, 120 parts of ethylene propylene diene rubber, 80 parts of acetylene carbon black, 6 parts of magnesia, DCP sulphur
1 part of agent, 3 parts of antioxidant NBC, 20 parts of naphthene base crude oil, 20 parts of fume colloidal silica, 10 parts of nanometer silicon carbide, nano-graphite 15
Part, 2 parts of other rubber.
As a further improvement on the present invention, other described rubber are one kind in natural rubber or nitrile rubber.
The present invention also provides a kind of preparation methods of semiconductive ethylene propylene diene monomer (EPDM) material, include the following steps：
(1) it is spare by the formulation selection material and proportion of the semiconductive ethylene propylene diene monomer (EPDM) material；
(2) by ethylene-propylene-diene monomer rubber base and conductive filler, nano modified material, oxidant, anti-aging agent, operation oil, its
The materials such as his rubber are put into mixing tank and are uniformly mixed, and are kneaded in mixer into partly leading after mixing and using blending method
Electric ethylene propylene diene rubber rubber master batch, for mixer mixing requirement temperature not higher than 45 DEG C, rotating speed is not less than 80rad/m；
(3) the semiconductive ethylene propylene diene rubber rubber master batch after being kneaded is through parking, and the storage period is no less than 24 hours, then in room
Temperature is lower to carry out back mixing, it is desirable that room temperature is not higher than 35 DEG C, and back mixing uses open mill, need to lead to circulating water, avoids that sulphur in advance occurs
Change, treat that sizing material softens, after surface is smooth；
(4) vulcanizing agent added in after the completion of mill carries out vulcanisation operation, after vulcanization obtains vulcanization in the mold of vulcanizer
Semiconductive ethylene propylene diene monomer (EPDM) material, it is desirable that 150 DEG C~180 DEG C of the temperature of vulcanizer, vulcanization time is no less than 15 minutes, sulphur
5~10MPa of cavity pressure during change.
The present invention also provides a kind of high-voltage direct-current cable accessory, the semiconductive material of the high-voltage direct-current cable accessory uses
The semiconductive ethylene propylene diene monomer (EPDM) material.
The beneficial effects of the invention are as follows：The present invention proposes a kind of novel semiconductive material for high-voltage direct-current cable accessory
Material formula and its preparation scheme, pass through and nanometer silicon carbide and nanometer stone are added in semiconductive material such as ethylene propylene diene monomer (EPDM) material
Ink makes its material character change, and can control conductivity in a rational range during D.C. high voltage transmission, really
It protects HVDC transmission line and its cable accessory is safe and reliable.
Description of the drawings
Fig. 1 is the semiconductive ethylene propylene diene rubber conductance property curve graph of first embodiment of the invention.
Fig. 2 is the semiconductive ethylene propylene diene rubber conductance property curve graph of second embodiment of the invention.
Fig. 3 is the semiconductive ethylene propylene diene rubber conductance property curve graph of third embodiment of the invention.
Specific embodiment
The invention discloses a kind of semiconductive ethylene propylene diene monomer (EPDM) material for high-voltage direct-current cable accessory, with ternary second
Third rubber is base-material, adds in conductive filler, oxidant, vulcanizing agent, anti-aging agent, operation oil, other rubber and nano modification material
Material, which is kneaded, to be vulcanized；The specific material mixture ratio of semiconductive ethylene propylene diene monomer (EPDM) material is measured with parts by weight, and proportioning is as follows：
120 parts of ethylene-propylene-diene monomer rubber base, 80~100 parts of conductive filler, 5~10 parts of oxidant, 1~5 part of vulcanizing agent, operation oil are 10
~20 parts, other rubber are 1~5 part, and nano modified material is 15~30 parts, and the anti-aging agent is 1 to 5 part.
The nano modified material is nanometer silicon carbide, the one or two of nano-graphite.
The conductive filler is one or more of acetylene carbon black, carbon fiber, superconductive carbon black, and the oxidant is oxygen
Change one kind in magnesium and zinc oxide, the vulcanizing agent is DCP vulcanizing agents, and selected anti-aging agent is antioxidant NBC, the operation oil choosing
Select naphthene base crude oil.
The relative density of the naphthene base crude oil is 0.7~1.0, and molecular weight is 550~750, viscosity-gravity constant 0.75
~0.85.
As the present invention one embodiment, 100 parts of ethylene propylene diene rubber, 100 parts of acetylene carbon black, 6 parts of zinc oxide,
1 part of DCP vulcanizing agents, 3 parts of antioxidant NBC, 20 parts of naphthene base crude oil, 20 parts of fume colloidal silica, 20 parts of nanometer silicon carbide, nanometer stone
5 parts of ink, 2 parts of other rubber.
As second embodiment of the present invention, 110 parts of ethylene propylene diene rubber, 90 parts of acetylene carbon black, 6 parts of magnesia, DCP
1 part of vulcanizing agent, 3 parts of antioxidant NBC, 20 parts of naphthene base crude oil, 20 parts of fume colloidal silica, 15 parts of nanometer silicon carbide, nano-graphite
10 parts, 2 parts of other rubber.
As the third embodiment of the present invention, 120 parts of ethylene propylene diene rubber, 80 parts of acetylene carbon black, 6 parts of magnesia, DCP
1 part of vulcanizing agent, 3 parts of antioxidant NBC, 20 parts of naphthene base crude oil, 20 parts of fume colloidal silica, 10 parts of nanometer silicon carbide, nano-graphite
15 parts, 2 parts of other rubber.
Other described rubber are one kind in natural rubber or nitrile rubber.
Above data are mass parts.
The invention also discloses a kind of preparation methods of semiconductive ethylene propylene diene monomer (EPDM) material, include the following steps：
(1) it is spare by the formulation selection material and proportion of semiconductive ethylene propylene diene monomer (EPDM) material of the present invention；
(2) by ethylene-propylene-diene monomer rubber base and conductive filler, nano modified material, oxidant, anti-aging agent, operation oil, its
The materials such as his rubber are put into mixing tank and are uniformly mixed, and are kneaded in mixer into partly leading after mixing and using blending method
Electric ethylene propylene diene rubber rubber master batch, for mixer mixing requirement temperature not higher than 45 DEG C, rotating speed is not less than 80rad/m；
(3) the semiconductive ethylene propylene diene rubber rubber master batch after being kneaded is through parking, and the storage period is no less than 24 hours, then in room
Temperature is lower to carry out back mixing, it is desirable that room temperature is not higher than 35 DEG C, and back mixing uses open mill, need to lead to circulating water, avoids that sulphur in advance occurs
Change, treat that sizing material softens, after surface is smooth；
(4) vulcanizing agent added in after the completion of mill carries out vulcanisation operation, after vulcanization obtains vulcanization in the mold of vulcanizer
Semiconductive ethylene propylene diene monomer (EPDM) material, it is desirable that 150 DEG C~180 DEG C of the temperature of vulcanizer, vulcanization time is no less than 15 minutes, sulphur
5~10MPa of cavity pressure during change.
Verify the conductance property of the ethylene propylene diene rubber of the present invention, testing its individual layer respectively using electrode method testing program is situated between
The conduction current of matter obtains its conductivity electric field relationship variation relation at different temperatures by conduction current.
The invention also discloses a kind of high-voltage direct-current cable accessory, the semiconductive material of the high-voltage direct-current cable accessory uses
Semiconductive ethylene propylene diene monomer (EPDM) material of the present invention.
Measure the conductance property of stress cone semiconductive ethylene propylene diene rubber and temperature and field strength 1~Fig. 3 of relationship below figure institutes
Show.
Fig. 1 to Fig. 3 semiconductive ethylene propylene diene rubber conductance property curves can be seen that one embodiment 30 DEG C,
Conductivity is 2.845 × 10 under 20KV electric field strengths-4S/m, 80 DEG C, conductivity is 7.55 × 10 under 20KV electric field strengths-4s/m。
Second embodiment conductivity under 30 DEG C, 20KV electric field strengths is 4.691 × 10-4S/m, 80 DEG C, electricity under 20KV electric field strengths
Conductance is 1.024 × 10-3s/m.Third embodiment conductivity under 30 DEG C, 20KV electric field strengths is 3.941 × 10-4S/m,
80 DEG C, conductivity is 9.499 × 10 under 20KV electric field strengths-4s/m。
To sum up, at an elevated temperature, the conductivity of material does not occur the transition of the order of magnitude.Therefore, high voltage direct current
The cable accessory of transmission of electricity can regulate and control cable accessory semi-conductive rubber conductivity by more than nano modification means, reduce temperature institute
Cause the difference of different materials conductivity variations, realize stress cone under D.C. high voltage transmission operating mode to electric field near cable connector
Good homogenizing.
Product prepared by material prescription according to the present invention at present respectively under 30 °~80 ° operating modes into horizontal high voltage
Direct current transportation is tested, it may be verified that the conductance property of the semiconductive EPDM of outfit is obtained good excellent by nano modification means
Change, under different temperatures and field strength operating mode, conductivity changes linearly trend, and does not occur largely transition.
The present invention propose it is a kind of novel for the semiconductive material formula of high-voltage direct-current cable accessory and its preparation scheme,
By adding nanometer silicon carbide and nano-graphite in semiconductive material such as ethylene propylene diene monomer (EPDM) material, its material character occurs
Change, can control conductivity in a rational range during D.C. high voltage transmission, it is ensured that HVDC transmission line
And its cable accessory is safe and reliable.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, several simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (7)
1. a kind of semiconductive ethylene propylene diene monomer (EPDM) material for high-voltage direct-current cable accessory, which is characterized in that with EPDM
Rubber is base-material, adds in conductive filler, oxidant, vulcanizing agent, anti-aging agent, operation oil, other rubber and nano modified material
Mixing vulcanizes；The specific material mixture ratio of semiconductive ethylene propylene diene monomer (EPDM) material is measured with parts by weight, and proportioning is as follows：Three
First 120 parts of EP rubbers base-material, 80 ~ 100 parts of conductive filler, 5 ~ 10 parts of oxidant, 1 ~ 5 part of vulcanizing agent, operation oil are 10 ~ 20
Part, other rubber are 1 ~ 5 part, and nano modified material is 15 ~ 30 parts, and the anti-aging agent is 1 to 5 part；
The nano modified material is nanometer silicon carbide, the one or two of nano-graphite；
The conductive filler is one or more of acetylene carbon black, carbon fiber, superconductive carbon black, and the oxidant is magnesia
With one kind in zinc oxide, the vulcanizing agent is DCP vulcanizing agents, and selected anti-aging agent is antioxidant NBC, the operation oil selection ring
Alkyl oil；
The relative density of the naphthene base crude oil is 0.7 ~ 1.0, and molecular weight is 550 ~ 750, and viscosity-gravity constant is 0.75 ~ 0.85.
2. semiconductive ethylene propylene diene monomer (EPDM) material according to claim 1, which is characterized in that
100 parts of ethylene propylene diene rubber, 100 parts of acetylene carbon black, 6 parts of zinc oxide, 1 part of DCP vulcanizing agents, 3 parts of antioxidant NBC, cycloalkanes
20 parts of base oil, 20 parts of fume colloidal silica, 20 parts of nanometer silicon carbide, 5 parts of nano-graphite, 2 parts of other rubber.
3. semiconductive ethylene propylene diene monomer (EPDM) material according to claim 1, which is characterized in that 110 parts of ethylene propylene diene rubber,
90 parts of acetylene carbon black, 6 parts of magnesia, 1 part of DCP vulcanizing agents, 3 parts of antioxidant NBC, 20 parts of naphthene base crude oil, fume colloidal silica 20
Part, 15 parts of nanometer silicon carbide, 10 parts of nano-graphite, 2 parts of other rubber.
4. semiconductive ethylene propylene diene monomer (EPDM) material according to claim 1, which is characterized in that 120 parts of ethylene propylene diene rubber,
80 parts of acetylene carbon black, 6 parts of magnesia, 1 part of DCP vulcanizing agents, 3 parts of antioxidant NBC, 20 parts of naphthene base crude oil, fume colloidal silica 20
Part, 10 parts of nanometer silicon carbide, 15 parts of nano-graphite, 2 parts of other rubber.
5. semiconductive ethylene propylene diene monomer (EPDM) material according to any one of claims 1 to 4, which is characterized in that it is described other
Rubber is one kind in natural rubber or nitrile rubber.
6. a kind of preparation method of any one of claim 1 to 5 semiconductive ethylene propylene diene monomer (EPDM) material, which is characterized in that
Include the following steps：
（1）It is standby by the formulation selection material and proportion of any one of claim 1 to 5 semiconductive ethylene propylene diene monomer (EPDM) material
With；
（2）By ethylene-propylene-diene monomer rubber base and conductive filler, nano modified material, oxidant, anti-aging agent, operation oil, other rubbers
Glue material is put into mixing tank and is uniformly mixed, and is kneaded in mixer into semiconductive ternary after mixing and using blending method
EP rubbers rubber master batch, for mixer mixing requirement temperature not higher than 45 DEG C, rotating speed is not less than 80 rad/m；
（3）Semiconductive ethylene propylene diene rubber rubber master batch after mixing is through parking, and the storage period is no less than 24 hours, then at room temperature
Carry out back mixing, it is desirable that room temperature is not higher than 35 DEG C, and back mixing uses open mill, need to lead to circulating water, avoids occurring to vulcanize in advance, treat
Sizing material softens, after surface is smooth；
（4）The vulcanizing agent added in after the completion of mill carries out vulcanisation operation, and half after being vulcanized in the mold of vulcanizer
Conductive ethylene propylene diene monomer (EPDM) material, it is desirable that 150 DEG C ~ 180 DEG C of the temperature of vulcanizer, vulcanization time is no less than 15 minutes, curing time
Between 5 ~ 10MPa of cavity pressure.
7. a kind of high-voltage direct-current cable accessory, which is characterized in that the semiconductive material of the high-voltage direct-current cable accessory uses right
It is required that 1 to 5 any one of them semiconductive ethylene propylene diene monomer (EPDM) material.
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| CN107622836A (en) * | 2017-08-23 | 2018-01-23 | 天津大学 | High-voltage direct-current cable accessory insulator interface electric charge suppresses material and suppressing method |
| CN107945969A (en) * | 2017-12-26 | 2018-04-20 | 无锡市明珠电缆有限公司 | A kind of orbit traffic direct current traction combination flexible cable and preparation method thereof |
| CN111793159B (en) * | 2020-01-16 | 2021-04-06 | 深圳市沃尔电力技术有限公司 | Production method and processing equipment of high-voltage insulation direct-current cable accessory material |
| CN112574517A (en) * | 2020-11-25 | 2021-03-30 | 长缆电工科技股份有限公司 | Semi-conductive material for cable accessory and preparation method thereof |
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| CN103214747A (en) * | 2013-05-13 | 2013-07-24 | 哈尔滨理工大学 | Ethylene propylene diene copolymer-based conductive nonlinear insulating material |
| CN103289214A (en) * | 2013-06-27 | 2013-09-11 | 上海三原电缆附件有限公司 | Ethylene propylene terpolymer insulating material for high-voltage direct-current cable accessory and preparation method thereof |
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| CN103214747A (en) * | 2013-05-13 | 2013-07-24 | 哈尔滨理工大学 | Ethylene propylene diene copolymer-based conductive nonlinear insulating material |
| CN103289214A (en) * | 2013-06-27 | 2013-09-11 | 上海三原电缆附件有限公司 | Ethylene propylene terpolymer insulating material for high-voltage direct-current cable accessory and preparation method thereof |
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| CN105255022A (en) | 2016-01-20 |
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