CN108384041A - Epoxy resins insulation surface charge suppressing method based on the processing of ∧ type gradient surfaces - Google Patents

Epoxy resins insulation surface charge suppressing method based on the processing of ∧ type gradient surfaces Download PDF

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Publication number
CN108384041A
CN108384041A CN201810167212.7A CN201810167212A CN108384041A CN 108384041 A CN108384041 A CN 108384041A CN 201810167212 A CN201810167212 A CN 201810167212A CN 108384041 A CN108384041 A CN 108384041A
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epoxy resins
resins insulation
surface charge
processing
gradient
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CN108384041B (en
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李进
杜伯学
冉昭玉
王泽华
梁虎成
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Tianjin University
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Tianjin University
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12Chemical modification
    • C08J7/126Halogenation
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2363/00Characterised by the use of epoxy resins; Derivatives of epoxy resins

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Epoxy Resins (AREA)

Abstract

The present invention discloses a kind of epoxy resins insulation surface charge suppressing method handled based on ∧ type gradient surfaces, and this method mainly includes the following steps:First make epoxy resins insulation sample;Then, linear gradient design is carried out in epoxy resins insulation specimen surface:Specimen surface is divided into five close-connected regions, design surface conductance first increases and then decreases;Sample is placed in fluorination treatment equipment, different time fluorination treatment, 25 DEG C of temperature, you can the epoxide resin material for the surface charge accumulation that is inhibited are carried out in different location according to dull distribution gradient.The present invention has important theory value and engineering significance to the safety for improving the performance and DC transmission system of GIL insulators.

Description

Epoxy resins insulation surface charge suppressing method based on the processing of ∧ type gradient surfaces
Technical field
The invention belongs to modified insulating materials and its preparation fields, and in particular to a kind of based on the processing of ∧ type gradient surfaces Epoxy resins insulation surface charge suppressing method.
Background technology
With the fast development of high voltage power transmisson system, GIL (gas-insulated metal-enclosed pipeline) due to it is high with reliability, The advantages that good economy performance, stress levels are high, transmission capacity is big, is gradually widely applied in recent years.Disc insulator is made For the solid insulation in GIL equipment, surface is the most weak part of system insulation, the epoxy insulation meter in During Process of Long-term Operation Area tires out a large amount of charges, may cause edge flashing.Epoxy resin has remarkable electricity, heat, mechanical property, is often used to manufacture Disc insulator.Studies have shown that failure caused by epoxy insulation dielectric surface flashover occupies sizable ratio in total failare.Cause This can to further increase GIL insulators to insulating materials progress surface modification so that it can accelerate the dissipation of surface charge New thinking is provided by property, becomes the important channel for improving power system security and reliability.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of epoxies based on the processing of ∧ type gradient surfaces Insulation resin surface charge suppressing method makes surface conductance gradient be distributed, suppression by carrying out gradient fluorination treatment to epoxy resin Surface charge accumulation is made, to promote the flashover voltage of insulator.
The technical solution adopted by the present invention to solve the technical problems is:Epoxy resin based on the processing of ∧ type gradient surfaces Insulating surface charge restraining method, this method comprises the following steps:
1) epoxy resins insulation sample is made:
(1) by epoxy resin-matrix and curing agent according to 3:1 mass ratio is mixed;
(2) mechanical agitation 60-90min;
(3) degassing process 40-60min;
(4) it pours into the mold for be coated with releasing agent and is heated to 70 DEG C, cure 4 hours;
(5) 130 DEG C are heated to, resolidification 4 hours;
(6) after being fully cured, cooling, demoulding can be obtained epoxy resins insulation sample;
2) linear gradient design is carried out in epoxy resins insulation specimen surface:
(1) specimen surface is divided into five close-connected regions, design surface conductance first increases and then decreases;
(2) sample is placed in fluorination treatment equipment, different time is carried out in different location according to dull distribution gradient Fluorination treatment, 25 DEG C of temperature, you can the epoxide resin material for the surface charge accumulation that is inhibited.
(2) manage different time at different locations according to dull distribution gradient step by step in the step 2), wherein being fluorinated Processing time is respectively 0min, 30min, 60min, 30min, 0min.
(2) manage different time at different locations according to dull distribution gradient step by step in the step 2), wherein being fluorinated Processing time is respectively 0min, 15min, 45min, 15min, 0min.
(2) manage different time at different locations according to dull distribution gradient step by step in the step 2), wherein being fluorinated Processing time is respectively 0min, 5min, 20min, 5min, 0min.
(1) epoxy resin-matrix is the bisphenol A epoxide resin of glycidol ethers step by step in the step 1).
(1) curing agent is low-molecular-weight polyamide resin HY-651 step by step in the step 1).
The gas that (2) fluorination treatment equipment uses step by step in the step 2) is N2/F2Volume ratio be 4/1 mixing Gas.
Advantageous effect
Epoxy resin is carried out gradient fluorination treatment by the present invention, obtains the epoxide resin material of surface conductance gradient distribution, The accumulation for effectively inhibiting surface charge is conducive to increase insulator DC flashover, promotes insulator electric durability energy.
The present invention carries out gradient fluorinated surface processing to epoxy specimens, and adjusts fluorination conditions, is formed surface graded Fluorinated layer reduces the accumulation of surface charge.Research shows that after the processing of fluorine gas gradient, the surface conductivity gradient of sample is distributed And numerical value increases, surface charge, which dissipates, to be accelerated.
Therefore to the research of surface fluorination gradient modification technology for the peace of the operation stability and electric system of raising GIL Full property has important theory value and engineering significance.
Description of the drawings
Fig. 1 is epoxy specimens production flow diagram;
Fig. 2 is the epoxy specimens surface conductance distribution map of embodiment 1;
Fig. 3 is that the epoxy specimens of embodiment 1 are compared with the initial surface Potential distribution of untreated epoxy specimens Figure;
Fig. 4 is that epoxy specimens take a position view.
Specific implementation mode
Below by specific embodiments and the drawings, the present invention is further illustrated.The embodiment of the present invention is in order to more So that those skilled in the art is more fully understood the present invention well, any limitation is not made to the present invention.
The present invention is based on the epoxy resins insulation surface charge suppressing methods of ∧ type gradient surfaces processing, and Fig. 1 is asphalt mixtures modified by epoxy resin Fat sample production flow diagram, Fig. 4 are that epoxy specimens take a position view.
The epoxy resin-matrix that the present invention uses is the bisphenol A epoxide resin of glycidol ethers;Curing agent is low molecular weight Polyamide HY-651;It is N to be fluorinated the gas used2/F2=4/1 mixed gas, and by the limited public affairs of the global gas in Tianjin Department provides.
Embodiment 1
1) by epoxy resin-matrix and curing agent according to 3:1 mass ratio is mixed, and is stirred using mechanical agitator 60min;Then 40min is de-gassed to epoxy resin composition using aspiration pump and vacuum tank, is then poured into painting Have in the mold of releasing agent, solidification, it is cooling, demould to get:
Wherein, epoxy resin is handled using gradient temperature solidification method:Solidification process is divided into two steps, first adds mold and base-material Then heat is again heated to 130 DEG C and cures 4 hours to curing 4 hours at 70 DEG C, after being fully cured, cooling, demoulding can be obtained ring Oxygen insulation resin sample.
2) ∧ type gradient designs are carried out on epoxy specimens surface, specimen surface is divided into five close-connected areas Domain, design surface conductance first increases and then decreases:Sample is placed in fluorination treatment equipment, according to dull distribution gradient in difference Position handles different time, and the fluorination treatment time is respectively 0min, 30min, 60min, 30min, 0min, 25 DEG C of temperature, you can Be inhibited the epoxide resin material of surface charge accumulation.
Fig. 2 is the epoxy specimens surface conductance distribution map of embodiment 1;
Fig. 3 is that the epoxy specimens of embodiment 1 are compared with the initial surface Potential distribution of untreated epoxy specimens Figure.
Show after the processing of fluorine gas gradient, the distribution of surface conductivity gradient and numerical value increase of sample, surface charge dissipation Accelerate.
Embodiment 2
1) by epoxy resin-matrix and curing agent according to 3:1 mass ratio is mixed, and is stirred using mechanical agitator 70min;Then 50min is de-gassed to epoxy resin composition using aspiration pump and vacuum tank, is then poured into painting Have in the mold of releasing agent, solidification, it is cooling, demould to get:
Wherein, epoxy resin is handled using gradient temperature solidification method.Solidification process is divided into two steps, first adds mold and base-material Then heat is again heated to 130 DEG C and cures 4 hours to curing 4 hours at 70 DEG C, after being fully cured, cooling, demoulding can be obtained ring Oxygen insulation resin sample.
2) ∧ type gradient designs are carried out on epoxy specimens surface, specimen surface is divided into five close-connected areas Domain, design surface conductance first increases and then decreases:Sample is placed in fluorination treatment equipment, according to dull distribution gradient in difference Position handles different time, and the fluorination treatment time is respectively 0min, 15min, 45min, 15min, 0min, 25 DEG C of temperature, you can Be inhibited the epoxide resin material of surface charge accumulation.
Embodiment 3
1) by epoxy resin-matrix and curing agent according to 3:1 mass ratio is mixed, and is stirred using mechanical agitator 90min;Then 60min is de-gassed to epoxy resin composition using aspiration pump and vacuum tank, is then poured into painting Have in the mold of releasing agent, solidification, it is cooling, demould to get:
Wherein, epoxy resin is handled using gradient temperature solidification method, and solidification process is divided into two steps, first adds mold and base-material Then heat is again heated to 130 DEG C and cures 4 hours to curing 4 hours at 70 DEG C, after being fully cured, cooling, demoulding can be obtained ring Oxygen insulation resin sample.
2) ∧ type gradient designs are carried out on epoxy specimens surface, specimen surface is divided into five close-connected areas Domain, design surface conductance first increases and then decreases:Sample is placed in fluorination treatment equipment, according to dull distribution gradient in difference Position handles different time, and the fluorination treatment time is respectively 0min, 5min, 20min, 5min, 0min, 25 DEG C of temperature, you can To the epoxide resin material for inhibiting surface charge accumulation.

Claims (7)

1. the epoxy resins insulation surface charge suppressing method based on the processing of ∧ type gradient surfaces, which is characterized in that this method packet Include following steps:
1) epoxy resins insulation sample is made:
(1) by epoxy resin-matrix and curing agent according to 3:1 mass ratio is mixed;
(2) mechanical agitation 60-90min;
(3) degassing process 40-60min;
(4) it pours into the mold for be coated with releasing agent and is heated to 70 DEG C, cure 4 hours;
(5) 130 DEG C are heated to, resolidification 4 hours;
(6) after being fully cured, cooling, demoulding can be obtained epoxy resins insulation sample;
2) linear gradient design is carried out in epoxy resins insulation specimen surface:
(1) specimen surface is divided into five close-connected regions, design surface conductance first increases and then decreases;
(2) sample is placed in fluorination treatment equipment, different time fluorination is carried out in different location according to dull distribution gradient Processing, 25 DEG C of temperature, you can the epoxide resin material for the surface charge accumulation that is inhibited.
2. the epoxy resins insulation surface charge suppressing method according to claim 1 based on the processing of ∧ type gradient surfaces, It is characterized in that, (2) manage different time, wherein fluorine at different locations according to dull distribution gradient step by step in the step 2) It is respectively 0min, 30min, 60min, 30min, 0min to change processing time.
3. the epoxy resins insulation surface charge suppressing method according to claim 1 based on the processing of ∧ type gradient surfaces, It is characterized in that, (2) manage different time, wherein fluorine at different locations according to dull distribution gradient step by step in the step 2) It is respectively 0min, 15min, 45min, 15min, 0min to change processing time.
4. the epoxy resins insulation surface charge suppressing method according to claim 1 based on the processing of ∧ type gradient surfaces, It is characterized in that, (2) manage different time, wherein fluorine at different locations according to dull distribution gradient step by step in the step 2) It is respectively 0min, 5min, 20min, 5min, 0min to change processing time.
5. the epoxy resins insulation surface charge suppressing method according to claim 1 based on the processing of ∧ type gradient surfaces, It is characterized in that, (1) epoxy resin-matrix is the bisphenol A epoxide resin of glycidol ethers step by step in the step 1).
6. the epoxy resins insulation surface charge suppressing method according to claim 1 based on the processing of ∧ type gradient surfaces, It is characterized in that, (1) curing agent is low-molecular-weight polyamide resin HY-651 step by step in the step 1).
7. the epoxy resins insulation surface charge suppressing method according to claim 1 based on the processing of ∧ type gradient surfaces, It is characterized in that, the gas that (2) fluorination treatment equipment uses step by step in the step 2) is N2/F2Volume ratio be 4/1 it is mixed Close gas.
CN201810167212.7A 2018-02-28 2018-02-28 Method for inhibiting charges on insulating surface of epoxy resin based on inverted V-shaped gradient surface treatment Expired - Fee Related CN108384041B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113793739A (en) * 2021-09-18 2021-12-14 合肥工业大学 Preparation method of surface conductivity gradient coating for direct-current GIL epoxy resin insulator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101840757A (en) * 2010-05-21 2010-09-22 扬州东宇电气有限公司 Manufacturing method for environment-friendly type insulator shell
CN104371133A (en) * 2014-11-04 2015-02-25 天津学子电力设备科技有限公司 Method for eliminating electrostatic charges on surface of basin-type insulator in GIS
CN105542399A (en) * 2016-01-18 2016-05-04 西安交通大学 Centrifugal manufacturing method for dielectric functional gradient insulator
CN105679473A (en) * 2016-01-18 2016-06-15 西安交通大学 Lamination fabrication method of dielectric functionally graded insulator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101840757A (en) * 2010-05-21 2010-09-22 扬州东宇电气有限公司 Manufacturing method for environment-friendly type insulator shell
CN104371133A (en) * 2014-11-04 2015-02-25 天津学子电力设备科技有限公司 Method for eliminating electrostatic charges on surface of basin-type insulator in GIS
CN105542399A (en) * 2016-01-18 2016-05-04 西安交通大学 Centrifugal manufacturing method for dielectric functional gradient insulator
CN105679473A (en) * 2016-01-18 2016-06-15 西安交通大学 Lamination fabrication method of dielectric functionally graded insulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113793739A (en) * 2021-09-18 2021-12-14 合肥工业大学 Preparation method of surface conductivity gradient coating for direct-current GIL epoxy resin insulator

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