CN105139921A - Epoxy insulation material for high-voltage dry type sleeve and sleeve machining process - Google Patents
Epoxy insulation material for high-voltage dry type sleeve and sleeve machining process Download PDFInfo
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- CN105139921A CN105139921A CN201510593800.3A CN201510593800A CN105139921A CN 105139921 A CN105139921 A CN 105139921A CN 201510593800 A CN201510593800 A CN 201510593800A CN 105139921 A CN105139921 A CN 105139921A
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- insulation material
- coupling agent
- modified filler
- epoxy resin
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Abstract
The invention provides an epoxy insulation material for a high-voltage dry type sleeve. The epoxy insulation material comprises epoxy resin and modified fillers, the modified fillers comprise one or more of aluminum hydroxide, antimonous oxide, zinc oxide, or white carbon black, and the mass ratio of the epoxy resin to the modified fillers is 1:0.05-1:3. The machining process for the high-voltage dry type sleeve mainly includes steps: 1) core rolling; and 2) vacuum impregnation. According to the material and the machining process, problems of low production efficiency and high cost of the high-voltage dry type sleeve and poor electrical performances of dielectric loss, partial discharge, and insulation etc. are mainly solved.
Description
Technical field
The present invention relates to the bushing of power transmission and transformation industry, be specifically related to a kind of high pressure dry and overlap effective epoxy insulation material and cover pipe processing technique.
Background technology
At present, the high pressure dry sleeve pipe that power transmission and transformation industry is used, mainly contains glue leaching wrinkle paper mold and glass fiber winding-type two kinds of modes.The product of these two kinds of modes from raw material, manufacture to use and all there is many problems.
Glue leaching wrinkle paper mold dry sleeve main material is crimped paper, all needs timber to make, does not meet current environmental protection trend and trend; The crimped paper fiber vacuum dry insulation processing cycle is long especially, and production cost is high; In the capillary fiber pipe of crimped paper fiber, epoxy resin is difficult to soak into completely, so any filler can not be added in epoxy raw material, the product heat dispersion that this glue is soaked, mechanical performance reduce greatly, also cause the electric property such as dielectric loss and partial discharge poor simultaneously; This product is when producing, all require very high to the performance of equipment and the operant level of workman, capacitor plate needs alternately to be arranged between crimped paper, the tightness that crimped paper rolls is difficult to control, any one deck capacitance electrode configuration errors or there is other recessive defect, all can cause scrapping of whole product, be not easy to produce in enormous quantities; This product is in production, storage and transportation; exposed epoxy moieties all needs seal protection, otherwise paper fiber can relapse the moisture content in air, causes sleeve pipe dielectric loss and partial discharge to increase; break down when causing product to use, bring very large hidden danger to the safe operation of equipment and system.
Glass fiber winding-type dry sleeve adopts glass fiber epoxy resin dipping to be wound around and makes under open environment.Glass fiber is wound around after epoxy glue drill traverse is saturating, and glass fiber quality is relatively tightr, and the epoxy soaked into can not add any filler, otherwise is just difficult to soak into, and the product defects caused when lacking filler is as above-mentioned; This product is rolling and immersing glue process, due to the restriction of equipment and processing method, cannot produce under vacuum, the impurity such as moisture content, dust in isolation material institute water content own and air cannot be removed, can penetrate in product core body, the edge treated of capacitance electrode, evenness, concentricity and all bad control of adhesive property, cause the electric properties such as the dielectric loss of product, partial discharge and insulation poor in addition, the qualification rate of producing is very low, and mass production still acquires a certain degree of difficulty.
Summary of the invention
The invention provides a kind of high pressure dry and overlap effective epoxy insulation material and cover pipe processing technique, mainly solve that background technology mesohigh dry sleeve production efficiency is low, cost is high, and the problem of the electric property difference such as dielectric loss, partial discharge and insulation.
Concrete technical solution of the present invention is as follows:
A kind of high pressure dry overlaps effective epoxy insulation material, and comprise epoxy resin, its special character also comprises modified filler, described modified filler comprise in aluminium hydroxide, antimonous oxide, zinc oxide or white carbon one or more; The mass ratio of described epoxy resin and modified filler is 1:0.05 ~ 1:3.
In order to improve performance, above-mentioned epoxy insulation material also can comprise coupling agent.
Preferred KH550 or KH560 of above-mentioned coupling agent, its quality accounts for 0.1% ~ 0.5% of epoxy resin and modified filler gross mass.
The first high pressure dry cover pipe processing technique, comprises the following steps:
1] fuse rolls
1.1] conducting rod is prepared;
1.2] synthetic fiber cloth or plastic wire are rolled on conducting rod;
1.3] capacitance electrode is rolled on the conducting rod after processing through step 1.2;
1.4] alternately repeat step 1.2 and step 1.3, until meet electric pressure requirement, form fuse;
2] vacuum-latexed
2.1] fuse after step 1 being processed loads in totally enclosed mould and vacuumizes;
2.2] adopt pressure gelation process to inject mold curing shaping by epoxy insulation material, the demoulding after Temperature fall to room temperature, form sleeve pipe; Described epoxy insulation material comprises epoxy resin and modified filler, described modified filler comprise in aluminium hydroxide, antimonous oxide, zinc oxide or white carbon one or more; The mass ratio of described epoxy resin and modified filler is 1:0.05 ~ 1:3.
Above-mentioned pressure gelation process parameter request is as follows:
A, vacuum degree are less than 100pa;
B, mixing time are greater than 60min.
Above-mentioned epoxy insulation material also comprises coupling agent, and its quality accounts for 0.1% ~ 0.5% of epoxy resin and modified filler gross mass;
Above-mentioned synthetic fiber cloth or plastic wire are before rolling use, and through dewaxing, degreasing, preimpregnation or coated with coupling agent process, its water absorption rate is less than 0.1%, and filament diameter is 0.1 ~ 2mm, and order number is 10 ~ 200 orders;
Above-mentioned capacitance electrode before rolling use, through deoiling, be oxidized, preimpregnation or coated with coupling agent process;
Above-mentioned conducting rod surface sand-blasting or coated with coupling agent.
The second high pressure dry cover pipe processing technique, comprises the following steps:
1] fuse rolls
1.1] conducting rod is prepared;
1.2] synthetic fiber cloth or plastic wire are rolled on conducting rod;
1.3] capacitance electrode is rolled on the conducting rod after processing through step 1.2;
1.4] alternately repeat step 1.2 and step 1.3, form ground floor fuse;
2] vacuum-latexed
2.1] the ground floor fuse after step 1 being processed loads in totally enclosed mould and vacuumizes;
2.2] pressure gelation process is adopted to inject mold curing shaping by epoxy insulation material, the demoulding after Temperature fall to room temperature; Described epoxy insulation material comprises epoxy resin and modified filler, described modified filler comprise in aluminium hydroxide, antimonous oxide, zinc oxide or white carbon one or more; The mass ratio of described epoxy resin and modified filler is 1:0.05 ~ 1:3;
3] alternately repeat step 1.2 to step 2.2, form second layer fuse successively ..., until form the sleeve pipe meeting electric pressure and require after outermost layer fuse curing molding.
Above-mentioned pressure gelation process parameter request is as follows:
A, vacuum degree are less than 100pa;
B, mixing time are greater than 60min.
Above-mentioned epoxy insulation material also comprises coupling agent, and its quality accounts for 0.1% ~ 0.5% of epoxy resin and modified filler gross mass;
Above-mentioned synthetic fiber cloth or plastic wire are before rolling use, and through dewaxing, degreasing, preimpregnation or coated with coupling agent process, its water absorption rate is less than 0.1%, and filament diameter is 0.1 ~ 2mm, and order number is 10 ~ 200 orders;
Above-mentioned capacitance electrode before rolling use, through deoiling, be oxidized, preimpregnation or coated with coupling agent process;
Above-mentioned conducting rod surface sand-blasting or coated with coupling agent.
Above-mentioned processing technology is also included in the step of the outer directly sulphurated siliastic overcoat of the good fuse of curing molding.
The invention has the advantages that:
1, the electric properties such as the dielectric loss of sleeve pipe, partial discharge and insulation can be improved.Adding of modified filler and coupling agent, from test effect, the test data of the electric properties such as dielectric loss, partial discharge and insulation, is obviously better than standard-required, improves a lot than like product.
2, the heat dispersion of sleeve pipe can be improved.The radiating effect increasing modified filler is better than the effect before not increasing, and therefore, add the epoxy insulation material of modified filler, its heat dispersion increases.
3, the mechanical performance of sleeve pipe can be improved.Use the epoxy resin adding modified filler to make fuse, its bending resistance, the mechanical performance such as antitorque significantly improve.
Accompanying drawing explanation
Fig. 1 is the high pressure dry sleeve pipe utilizing processing method provided by the invention to process;
Accompanying drawing is detailed as follows: 1-conducting rod; 2-synthetic fiber cloth or plastic wire; 3-capacitance electrode.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in detail:
The first processing method of this high pressure dry sleeve pipe comprises the following steps:
1] fuse rolls
1.1] according to current-carrying mode determination conducting rod diameter and at conducting rod surface sand-blasting and coated with coupling agent; Such as: determine that current-carrying is the conducting rod of 1250 amperes, its diameter is 65mm, current-carrying mode is direct current-carrying, compressed air blasting craft is utilized to carry out sandblasting on conducting rod surface, sand can select 80 ~ 100 object grains of sand of diamond dust material, need after sandblasting completes to carry out to clean, dry, at layer of sand surface-coated twice coupling agent after drying completes, coupling agent can select KH550, KH560, wherein the performance of KH550 improves the bonding activity of epoxy resin and aluminum alloy surface, can be used as optimal selection;
1.2] synthetic fiber cloth after dewaxing, degreasing, preimpregnation coupling agent treatment or plastic wire are rolled on the conducting rod processed through step 1.1; The heatproof of synthetic fiber cloth or plastic wire requires as >=180 DEG C; Roll speed≤10r/min; Synthetic fiber cloth or plastic wire are through special degreasing with after infiltrating coupling agent PROCESS FOR TREATMENT, and water absorption rate is less than 0.1%; Filament diameter is 0.1 ~ 2mm; Order number is 10 ~ 200 orders.
For electronic-grade glass fiber cloth, select the finished fabric of 0.15mm, first carry out dewaxing, ungrease treatment, the object of this process improves the adhesive strength of glass fibre and epoxy resin, and this processing mode is known technology; After above-mentioned process, then immerse in coupling agent by glass fabric, the object of this process improves the wettability of glass fabric and epoxy resin, and coupling agent can select silane coupler, immerses time 30min; Glass fabric is taken out from coupling agent and drying, roll on the conducting rod of diameter for 65mm with the speed being less than 10r/min after drying completes;
1.3] capacitance electrode through the coupling agent that deoils, is oxidized, is coated with is rolled on the conducting rod processed through step 1.2; Roll speed≤10r/min; For fine aluminium capacitance electrode, select thickness to be the aluminium foil of 0.01mm, first carry out deoiling, anodized, the object of this process removes aluminium foil surface oil or other impurity, and improve aluminium foil surface energy and bond area, this processing mode is known technology; After above-mentioned process, then to capacitive electrode surface coated with coupling agent, the object of this process improves the activation energy of aluminium foil surface, and coupling agent can select KH560; Capacitance electrode through above-mentioned process is rolled on the conducting rod of diameter for 65mm with the speed of 10r/min;
1.4] alternately step 1.2 and step 1.3 is repeated, until meet electric pressure requirement.It is 10 layers that general 35kV is wound around the capacitance electrode number of plies, and it is 20 layers that 110kV is wound around the capacitance electrode number of plies, and outermost layer is synthetic fiber cloth or plastic wire; Capacitance electrode should carry out flanging process, and the length difference between each layer should be ± 0.2mm, and the thickness difference between each layer should be ± 0.1mm;
2] vacuum-latexed
2.1] fuse of roll-forming after processing through step 1 is loaded in totally enclosed mould, vacuumize under 90 DEG C ~ 110 DEG C ambient temperatures and dry 1 ~ 3 hour;
2.2] adopt pressure gelation process to inject in mould by epoxy resin, after being incubated 0.8 ~ 1.5 hour at 90 DEG C ~ 110 DEG C, then it is shaping to be warming up to 130 ~ 150 DEG C of insulations, 2.8 ~ 3.5 hours Post RDBMS, the demoulding after Temperature fall to room temperature.
Pressure gelation process parameter request is as follows: a. vacuum degree is less than 100pa; B. mixing time is greater than 60min;
In order to improve the electric property of epoxy resin, mechanical performance and heat dispersion, the present invention can also add in aluminium hydroxide, antimonous oxide, zinc oxide or white carbon in the epoxy one or more, as modified filler, the mass ratio of epoxy resin and modified filler is 1:0.05 ~ 1:3, preferred 1:0.5.Abundant mix and blend, degassed rear injection mould.
The second processing method of this high pressure dry sleeve pipe, with the difference of first method be: first form ground floor fuse according to first method, after curing molding, form second layer fuse again, continue curing molding, form final fuse successively, the particularly important is, the present invention according to the requirement of dielectric strength, in the fuse of different layers, can select the epoxy insulation material of different modified filler.
In order to make sleeve pipe adapt to different environments for use, also can at the outer directly sulphurated siliastic overcoat of the good fuse of curing molding.
By the contrast of a large amount of test datas, find that the dry sleeve of sleeve pipe that processing method of the present invention produces and traditional oil filled bushing and existing structure is compared and have the following advantages:
(1) dielectric loss of sleeve pipe is about 0.2%, much smaller than national standard 0.7%, and can not relapse the moisture in air, store and transportation in without the need to special protection, stability, the reliability of another long-time running are improved;
(2) through Optimal design and calculation, under relatively little size, can obtain higher dielectric strength, electrical property is more superior.
The present invention's synthetic fiber cloth or plastic wire substitute crimped paper or glass fiber, product meets environmental protection trend, novelty employ pressure gelation process, greatly reduce the drying and impregnation process-cycle of product, save entreprise cost, improve the competitiveness of product in market, there is higher market popularization value.
Claims (10)
1. high pressure dry overlaps effective epoxy insulation material, comprises epoxy resin, it is characterized in that, also comprise modified filler, described modified filler comprise in aluminium hydroxide, antimonous oxide, zinc oxide or white carbon one or more; The mass ratio of described epoxy resin and modified filler is 1:0.05 ~ 1:3.
2. high pressure dry according to claim 1 overlaps effective epoxy insulation material, it is characterized in that, also comprises coupling agent, and its quality accounts for 0.1% ~ 0.5% of epoxy resin and modified filler gross mass.
3. high pressure dry according to claim 2 overlaps effective epoxy insulation material, it is characterized in that, described coupling agent is KH550 or KH560.
4. high pressure dry cover pipe processing technique, is characterized in that, comprise the following steps:
1] fuse rolls
1.1] conducting rod is prepared;
1.2] synthetic fiber cloth or plastic wire are rolled on conducting rod;
1.3] capacitance electrode is rolled on the conducting rod after processing through step 1.2;
1.4] alternately repeat step 1.2 and step 1.3, until meet electric pressure requirement, form fuse;
2] vacuum-latexed
2.1] fuse after step 1 being processed loads in totally enclosed mould and vacuumizes;
2.2] adopt pressure gelation process to inject mold curing shaping by epoxy insulation material, the demoulding after Temperature fall to room temperature, form sleeve pipe; Described epoxy insulation material comprises epoxy resin and modified filler, described modified filler comprise in aluminium hydroxide, antimonous oxide, zinc oxide or white carbon one or more; The mass ratio of described epoxy resin and modified filler is 1:0.05 ~ 1:3.
5. high pressure dry cover pipe processing technique according to claim 4, it is characterized in that, described pressure gelation process parameter request is as follows:
A, vacuum degree are less than 100pa;
B, mixing time are greater than 60min.
6. the high pressure dry cover pipe processing technique according to claim 4 or 5, it is characterized in that, described epoxy insulation material also comprises coupling agent, and its quality accounts for 0.1% ~ 0.5% of epoxy resin and modified filler gross mass;
Described synthetic fiber cloth or plastic wire are before rolling use, and through dewaxing, degreasing, preimpregnation or coated with coupling agent process, its water absorption rate is less than 0.1%, and filament diameter is 0.1 ~ 2mm, and order number is 10 ~ 200 orders;
Described capacitance electrode before rolling use, through deoiling, be oxidized, preimpregnation or coated with coupling agent process;
Described conducting rod surface sand-blasting or coated with coupling agent.
7. high pressure dry cover pipe processing technique, is characterized in that, comprise the following steps:
1] fuse rolls
1.1] conducting rod is prepared;
1.2] synthetic fiber cloth or plastic wire are rolled on conducting rod;
1.3] capacitance electrode is rolled on the conducting rod after processing through step 1.2;
1.4] alternately repeat step 1.2 and step 1.3, form ground floor fuse;
2] vacuum-latexed
2.1] the ground floor fuse after step 1 being processed loads in totally enclosed mould and vacuumizes;
2.2] pressure gelation process is adopted to inject mold curing shaping by epoxy insulation material, the demoulding after Temperature fall to room temperature; Described epoxy insulation material comprises epoxy resin and modified filler, described modified filler comprise in aluminium hydroxide, antimonous oxide, zinc oxide or white carbon one or more; The mass ratio of described epoxy resin and modified filler is 1:0.05 ~ 1:3;
3] alternately repeat step 1.2 to step 2.2, form second layer fuse successively ..., until form the sleeve pipe meeting electric pressure and require after outermost layer fuse curing molding.
8. high pressure dry cover pipe processing technique according to claim 7, it is characterized in that, described pressure gelation process parameter request is as follows:
A, vacuum degree are less than 100pa;
B, mixing time are greater than 60min.
9. the high pressure dry cover pipe processing technique according to claim 7 or 8, it is characterized in that, described epoxy insulation material also comprises coupling agent, and its quality accounts for 0.1% ~ 0.5% of epoxy resin and modified filler gross mass;
Described synthetic fiber cloth or plastic wire are before rolling use, and through dewaxing, degreasing, preimpregnation or coated with coupling agent process, its water absorption rate is less than 0.1%, and filament diameter is 0.1 ~ 2mm, and order number is 10 ~ 200 orders;
Described capacitance electrode before rolling use, through deoiling, be oxidized, preimpregnation or coated with coupling agent process;
Described conducting rod surface sand-blasting or coated with coupling agent.
10. high pressure dry cover pipe processing technique according to claim 9, is characterized in that: the step being also included in the outer directly sulphurated siliastic overcoat of the good fuse of curing molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510593800.3A CN105139921A (en) | 2015-09-17 | 2015-09-17 | Epoxy insulation material for high-voltage dry type sleeve and sleeve machining process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510593800.3A CN105139921A (en) | 2015-09-17 | 2015-09-17 | Epoxy insulation material for high-voltage dry type sleeve and sleeve machining process |
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| CN105139921A true CN105139921A (en) | 2015-12-09 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105355344A (en) * | 2015-12-20 | 2016-02-24 | 西安神电高压电器有限公司 | High-voltage bushing and processing technology thereof |
| CN105655069A (en) * | 2016-04-11 | 2016-06-08 | 孟繁恒 | Impregnation method for dry capacitance type high-voltage bushing core |
| CN105820507A (en) * | 2016-04-19 | 2016-08-03 | 西安思坦电气技术有限公司 | Insulation layer of glass fiber-reinforced plastic capacitive transformer bushing and preparation method thereof |
| CN113593794A (en) * | 2021-07-01 | 2021-11-02 | 搏世因（北京）高压电气有限公司 | Automatic pressure gel pure dry type capacitance type high-voltage insulation sleeve and manufacturing method thereof |
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| CN104200938A (en) * | 2014-09-04 | 2014-12-10 | 西安神电高压电器有限公司 | Machining method for high-voltage capacitive dry-type bushing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20130203897A1 (en) * | 2010-02-03 | 2013-08-08 | Abb Research Ltd | Electrical insulation system |
| CN102942767A (en) * | 2012-12-06 | 2013-02-27 | 及荣军 | Insulation composition as well as insulation material, shed and insulator using same, and manufacturing method thereof |
| CN104177780A (en) * | 2014-08-20 | 2014-12-03 | 国家电网公司 | Outdoor electric-insulation modified epoxy resin composition |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105355344A (en) * | 2015-12-20 | 2016-02-24 | 西安神电高压电器有限公司 | High-voltage bushing and processing technology thereof |
| CN105655069A (en) * | 2016-04-11 | 2016-06-08 | 孟繁恒 | Impregnation method for dry capacitance type high-voltage bushing core |
| CN105655069B (en) * | 2016-04-11 | 2017-05-03 | 孟繁恒 | Impregnation method for dry capacitance type high-voltage bushing core |
| CN105820507A (en) * | 2016-04-19 | 2016-08-03 | 西安思坦电气技术有限公司 | Insulation layer of glass fiber-reinforced plastic capacitive transformer bushing and preparation method thereof |
| CN113593794A (en) * | 2021-07-01 | 2021-11-02 | 搏世因（北京）高压电气有限公司 | Automatic pressure gel pure dry type capacitance type high-voltage insulation sleeve and manufacturing method thereof |
| CN113593794B (en) * | 2021-07-01 | 2023-08-08 | 搏世因（北京）高压电气有限公司 | Automatic pressure gel pure dry type capacitor type high-voltage insulating sleeve and manufacturing method thereof |
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Application publication date: 20151209 |