CN105315887A - Preparation method of insulating layer of power transformer - Google Patents
Preparation method of insulating layer of power transformer Download PDFInfo
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- CN105315887A CN105315887A CN201510844541.7A CN201510844541A CN105315887A CN 105315887 A CN105315887 A CN 105315887A CN 201510844541 A CN201510844541 A CN 201510844541A CN 105315887 A CN105315887 A CN 105315887A
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Abstract
The invention discloses a preparation method of an insulating layer of a power transformer. The preparation method comprises the steps of adding methyl vinyl silicone rubber, ethene-octylene copolymer and butadiene rubber, and stirring the mixture for 5-10 minutes at the temperate of 80-100 DEG C; adding linear low-density polyethylene, flame retardant and antioxidant, and stirring the mixture for 2-5 minutes at the temperature of 80-100 DEG C; adding a vulcanizing agent, a cross-linking agent, an antistatic agent, nano-silica and tetrahydrofuran, and stirring the mixture for 15-25 minutes at the temperature of 40-50 DEG C; subsequently, raising the temperature to 60 DEG C, conducting fast stirring for 2.5-3.5 hours, and obtaining a mixture; applying the mixture uniformly to the surface to be coated of the power transformer, drying the surface at the temperature of 120-130 DEG C, and obtaining the insulating layer of the power transformer. According to the preparation method of the insulating layer of the power transformer, the elastic ethene-octylene copolymer and the thermoplastic linear low-density polyethylene are mixed with the silicone rubber, so that electricity leakage caused by expansion of the insulating layer due to high voltage heating can be effectively prevented.
Description
Technical field
The present invention relates to transformer equipment field, specifically a kind of preparation method of electric power transformer insulated layer.
Background technology
Transformer is used to convert voltage of alternating current, electric current and transmit a kind of static electrical equipment of AC energy.It realizes electrical energy transfer according to the principle of electromagnetic induction.Transformer can be divided into the transformer of power transformer, testing transformer, instrument transformer and special purpose with regard to its purposes; Power transformer is wherein a kind of static electric installation, being used to the voltage of alternating current of a certain numerical value (electric current) to become the equipment of the identical another kind of frequency or the different voltage (electric current) of several numerical value, is also the necessaries of power transmission and distribution, power consumer distribution.
It is the sharp weapon improving distribution network insulating and power supply reliability that power transmission and transforming equipment arranges insulation layer, it can effectively prevent exposed controller switching equipment electrical connector due to people be touch, power failure that animalcule or foreign material overlap joint, acid rain corrosion etc. cause and electric shock accidents.At present, both at home and abroad for the outer insulating material of power system power transmission and transforming equipment based on organic materials, mainly comprise epoxy resin, ethylene-propylene rubber(EPR) and silicon rubber etc.Silicon rubber especially hot-vulcanized silicone rubber has outstanding advantage in resist degradation, anti creepage trace and galvanic corrosion damage, hydrophobic nature and didirtresistance etc., replaces other composite insulating materials gradually, power transmission and transforming equipment is widely used.But along with improving constantly of voltage range, existing silastic material exists the electricity caused due to high-voltage expanded by heating and leaks, and flame retardant properties is not enough and cause power transmission and transforming equipment easily to occur the technical barrier of potential safety hazard.
Summary of the invention
The object of the present invention is to provide a kind of preparation method having elasticity and flexible electric power transformer insulated layer concurrently.
For achieving the above object, the invention provides following technical scheme:
The preparation method of electric power transformer insulated layer, comprises the following steps:
(1) ethylene-octene copolymer of the methyl vinyl silicone rubber of 60-80 weight part, 20-25 weight part, the cis-1,4-polybutadiene rubber of 12-20 weight part are added in the electric stirred vessel of band heating and stirring device, at 80-100 DEG C of temperature, stir 5-10min with the rotating speed of 300r/min;
(2) in the electric stirred vessel of step (1), add linear low density polyethylene, the fire retardant of 25-35 weight part, the oxidation inhibitor of 0.1-1 weight part of 15-22 weight part, at 80-100 DEG C of temperature, stir 2-5min with the rotating speed of 300r/min;
(3) in the electric stirred vessel of step (2), add the vulcanizing agent of 0.5-0.8 weight part, the linking agent of 1.8-2.6 weight part, the static inhibitor of 0.3-0.8 weight part, the nano silicon of 6-8 weight part, the tetrahydrofuran (THF) of 3-5 weight part, at 40-50 DEG C of temperature, stir 15-25min with the rotating speed of 500-800r/min; Then, under being warming up to 60 DEG C of temperature, with the rotating speed rapid stirring 2.5-3.5h of 1000r/min, the mixture that viscosity is 80-120Pas is obtained;
(4) mixture that step (3) is obtained is uniformly coated on power transformer clad can be coated, then puts it into the high temperature drying case interior oven dry 40-60min of 120-130 DEG C, obtain insulation layer.
As the further scheme of the present invention: the ethylene-octene copolymer of described ethylene-octene copolymer to be ethylene content be 40-60wt%.
As the further scheme of the present invention: described fire retardant is one or more the mixture in aluminium hydroxide, magnesium hydroxide.
As the further scheme of the present invention: described oxidation inhibitor is antioxidant 264 or antioxidant 1076.
As the further scheme of the present invention: described vulcanizing agent is one or more the mixture in benzoyl peroxide, t-butylperoxyl benzoate.
As the further scheme of the present invention: described linking agent is one or more the mixture in many organoalkoxysilanes, many Diacetylmonoximes base silane, many acetoxysilanes, polyamines base silane, multiamide base silane, many iso-propenyloxysilanes, containing hydrogen silicone oil.
Compared with prior art, the invention has the beneficial effects as follows: the present invention mixes with silicon rubber by having elastic ethylene-octene copolymer and have thermoplastic linear low density polyethylene, elasticity and the snappiness of material can not only be regulated, and the consistency can improved between linear low density polyethylene and silicon rubber, obtained insulation layer had both had excellent elasticity, have again excellent snappiness, the electricity that can effectively prevent insulation layer from causing due to high-voltage expanded by heating leaks.
Embodiment
Below in conjunction with the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, the preparation method of electric power transformer insulated layer, comprises the following steps:
(1) be the ethylene-octene copolymer of 40wt% by the ethylene content of the methyl vinyl silicone rubber of 60 weight parts, 20 weight parts, the cis-1,4-polybutadiene rubber of 12 weight parts adds in the electric stirred vessel of band heating and stirring device, at 80 DEG C of temperature, stir 10min with the rotating speed of 300r/min;
(2) in the electric stirred vessel of step (1), add linear low density polyethylene, the aluminium hydroxide of 25 weight parts, the antioxidant 264 of 0.1 weight part of 15 weight parts, at 80 DEG C of temperature, stir 5min with the rotating speed of 300r/min;
(3) in the electric stirred vessel of step (2), add the benzoyl peroxide of 0.5 weight part, many organoalkoxysilanes of 1.8 weight parts, the static inhibitor of 0.3 weight part, the nano silicon of 6 weight parts, the tetrahydrofuran (THF) of 3 weight parts, at 40 DEG C of temperature, stir 25min with the rotating speed of 500r/min; Then, under being warming up to 60 DEG C of temperature, with the rotating speed rapid stirring 2.5h of 1000r/min, the mixture that viscosity is 80Pas is obtained;
(4) mixture that step (3) is obtained is uniformly coated on power transformer clad can be coated, then puts it into the high temperature drying case interior oven dry 60min of 120 DEG C, obtain insulation layer.
Embodiment 2
In the embodiment of the present invention, the preparation method of electric power transformer insulated layer, comprises the following steps:
(1) be the ethylene-octene copolymer of 50wt% by the ethylene content of the methyl vinyl silicone rubber of 70 weight parts, 22 weight parts, the cis-1,4-polybutadiene rubber of 16 weight parts adds in the electric stirred vessel of band heating and stirring device, at 90 DEG C of temperature, stir 8min with the rotating speed of 300r/min;
(2) add in the electric stirred vessel of step (1) linear low density polyethylene of 18 weight parts, 30 weight parts etc. the aluminium hydroxide of mass ratio and magnesium hydroxide mixture, 0.5 weight part antioxidant 1076, at 90 DEG C of temperature, stir 3min with the rotating speed of 300r/min;
(3) in the electric stirred vessel of step (2), add the benzoyl peroxide of 0.7 weight part, many Diacetylmonoximes base silane of 2.2 weight parts, the static inhibitor of 0.5 weight part, the nano silicon of 7 weight parts, the tetrahydrofuran (THF) of 4 weight parts, at 45 DEG C of temperature, stir 20min with the rotating speed of 600r/min; Then, under being warming up to 60 DEG C of temperature, with the rotating speed rapid stirring 3h of 1000r/min, the mixture that viscosity is 105Pas is obtained;
(4) mixture that step (3) is obtained is uniformly coated on power transformer clad can be coated, then puts it into the high temperature drying case interior oven dry 5min of 125 DEG C, obtain insulation layer.
Embodiment 3
In the embodiment of the present invention, the preparation method of electric power transformer insulated layer, comprises the following steps:
(1) be the ethylene-octene copolymer of 60wt% by the ethylene content of the methyl vinyl silicone rubber of 80 weight parts, 25 weight parts, the cis-1,4-polybutadiene rubber of 20 weight parts adds in the electric stirred vessel of band heating and stirring device, at 100 DEG C of temperature, stir 5min with the rotating speed of 300r/min;
(2) in the electric stirred vessel of step (1), add linear low density polyethylene, the magnesium hydroxide of 35 weight parts, the antioxidant 264 of 1 weight part of 22 weight parts, at 100 DEG C of temperature, stir 2min with the rotating speed of 300r/min;
(3) in the electric stirred vessel of step (2), add the t-butylperoxyl benzoate of 0.8 weight part, many acetoxysilanes of 2.6 weight parts, the static inhibitor of 0.8 weight part, the nano silicon of 8 weight parts, the tetrahydrofuran (THF) of 5 weight parts, at 50 DEG C of temperature, stir 15min with the rotating speed of 800r/min; Then, under being warming up to 60 DEG C of temperature, with the rotating speed rapid stirring 3.5h of 1000r/min, the mixture that viscosity is 80Pas is obtained;
(4) mixture that step (3) is obtained is uniformly coated on power transformer clad can be coated, then puts it into the high temperature drying case interior oven dry 40min of 130 DEG C, obtain insulation layer.
Embodiment 4
In the embodiment of the present invention, the preparation method of electric power transformer insulated layer, comprises the following steps:
(1) be the ethylene-octene copolymer of 55wt% by the ethylene content of the methyl vinyl silicone rubber of 65 weight parts, 23 weight parts, the cis-1,4-polybutadiene rubber of 18 weight parts adds in the electric stirred vessel of band heating and stirring device, at 80 DEG C of temperature, stir 10min with the rotating speed of 300r/min;
(2) in the electric stirred vessel of step (1), add linear low density polyethylene, the aluminium hydroxide of 28 weight parts, the antioxidant 264 of 0.8 weight part of 17 weight parts, at 80 DEG C of temperature, stir 5min with the rotating speed of 300r/min;
(3) in the electric stirred vessel of step (2), add the benzoyl peroxide of 0.6 weight part, many organoalkoxysilanes of 2.0 weight parts, the static inhibitor of 0.4 weight part, the nano silicon of 7 weight parts, the tetrahydrofuran (THF) of 4 weight parts, at 40 DEG C of temperature, stir 25min with the rotating speed of 500r/min; Then, under being warming up to 60 DEG C of temperature, with the rotating speed rapid stirring 2.5h of 1000r/min, the mixture that viscosity is 80Pas is obtained;
(4) mixture that step (3) is obtained is uniformly coated on power transformer clad can be coated, then puts it into the high temperature drying case interior oven dry 60min of 120 DEG C, obtain insulation layer.
The present invention mixes with silicon rubber by having elastic ethylene-octene copolymer and have thermoplastic linear low density polyethylene, elasticity and the snappiness of material can not only be regulated, and the consistency can improved between linear low density polyethylene and silicon rubber, obtained insulation layer had both had excellent elasticity, have again excellent snappiness, the electricity that can effectively prevent insulation layer from causing due to high-voltage expanded by heating leaks.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.
In addition, be to be understood that, although this specification sheets is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of specification sheets is only for clarity sake, those skilled in the art should by specification sheets integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (6)
1. the preparation method of electric power transformer insulated layer, is characterized in that, comprises the following steps:
(1) ethylene-octene copolymer of the methyl vinyl silicone rubber of 60-80 weight part, 20-25 weight part, the cis-1,4-polybutadiene rubber of 12-20 weight part are added in the electric stirred vessel of band heating and stirring device, at 80-100 DEG C of temperature, stir 5-10min with the rotating speed of 300r/min;
(2) in the electric stirred vessel of step (1), add linear low density polyethylene, the fire retardant of 25-35 weight part, the oxidation inhibitor of 0.1-1 weight part of 15-22 weight part, at 80-100 DEG C of temperature, stir 2-5min with the rotating speed of 300r/min;
(3) in the electric stirred vessel of step (2), add the vulcanizing agent of 0.5-0.8 weight part, the linking agent of 1.8-2.6 weight part, the static inhibitor of 0.3-0.8 weight part, the nano silicon of 6-8 weight part, the tetrahydrofuran (THF) of 3-5 weight part, at 40-50 DEG C of temperature, stir 15-25min with the rotating speed of 500-800r/min; Then, under being warming up to 60 DEG C of temperature, with the rotating speed rapid stirring 2.5-3.5h of 1000r/min, the mixture that viscosity is 80-120Pas is obtained;
(4) mixture that step (3) is obtained is uniformly coated on power transformer clad can be coated, then puts it into the high temperature drying case interior oven dry 40-60min of 120-130 DEG C, obtain insulation layer.
2. the preparation method of electric power transformer insulated layer according to claim 1, is characterized in that, the ethylene-octene copolymer of described ethylene-octene copolymer to be ethylene content be 40-60wt%.
3. the preparation method of electric power transformer insulated layer according to claim 1, is characterized in that, described fire retardant is one or more the mixture in aluminium hydroxide, magnesium hydroxide.
4. the preparation method of electric power transformer insulated layer according to claim 1, is characterized in that, described oxidation inhibitor is antioxidant 264 or antioxidant 1076.
5. the preparation method of electric power transformer insulated layer according to claim 1, is characterized in that, described vulcanizing agent is one or more the mixture in benzoyl peroxide, t-butylperoxyl benzoate.
6. the preparation method of electric power transformer insulated layer according to claim 1, it is characterized in that, described linking agent is one or more the mixture in many organoalkoxysilanes, many Diacetylmonoximes base silane, many acetoxysilanes, polyamines base silane, multiamide base silane, many iso-propenyloxysilanes, containing hydrogen silicone oil.
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| CN201510844541.7A CN105315887A (en) | 2015-11-25 | 2015-11-25 | Preparation method of insulating layer of power transformer |
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| CN201510844541.7A CN105315887A (en) | 2015-11-25 | 2015-11-25 | Preparation method of insulating layer of power transformer |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826059A (en) * | 2016-06-09 | 2016-08-03 | 苏州高精特专信息科技有限公司 | High-overload transformer |
| CN105826053A (en) * | 2016-06-09 | 2016-08-03 | 苏州高精特专信息科技有限公司 | Low-voltage coil and high-voltage coil for dry type transformer |
| CN106098332A (en) * | 2016-06-09 | 2016-11-09 | 苏州高精特专信息科技有限公司 | A kind of transformator low-voltage coil and high-tension coil |
| CN106085216A (en) * | 2016-06-21 | 2016-11-09 | 江苏科技大学 | A kind of organic silicon rubber Base Metal hot-working protective coating |
| CN106099659A (en) * | 2016-08-29 | 2016-11-09 | 四川行之智汇知识产权运营有限公司 | Cable is stablized mount type top and is imported and exported formula distribution box |
| CN106253091A (en) * | 2016-08-29 | 2016-12-21 | 四川行之智汇知识产权运营有限公司 | Internal layer protection type regulator cubicle based on anti-pull part |
| CN106243999A (en) * | 2016-08-29 | 2016-12-21 | 四川行之智汇知识产权运营有限公司 | By the preparation technology of overcoat inside distribution box |
| CN106336800A (en) * | 2016-08-29 | 2017-01-18 | 四川行之智汇知识产权运营有限公司 | Protective layer used for inner side of power distribution box |
| CN106349927A (en) * | 2016-08-29 | 2017-01-25 | 四川行之智汇知识产权运营有限公司 | Coating process of protective layer for electrical cabinet |
| CN106374352A (en) * | 2016-08-29 | 2017-02-01 | 四川行之智汇知识产权运营有限公司 | Protection layer-based metal-enclosed power distribution cabinet with top inlet/outlet |
| CN107069473A (en) * | 2017-06-12 | 2017-08-18 | 国网山东省电力公司平原县供电公司 | A kind of insulating environment-friendly distribution box |
| CN107266865A (en) * | 2017-08-03 | 2017-10-20 | 安徽华能集团电器有限公司 | A kind of transformer epoxy resin insulation material |
| CN111057418A (en) * | 2019-11-28 | 2020-04-24 | 国网山东省电力公司经济技术研究院 | Power transformer insulating layer and preparation method thereof |
| CN112552562A (en) * | 2020-12-14 | 2021-03-26 | 深圳市乐普泰科技股份有限公司 | Ultralow temperature resistant rubber foam material and preparation method thereof |
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| CN104788799A (en) * | 2015-04-21 | 2015-07-22 | 江苏德威新材料股份有限公司 | Cable sheath material for environmentally friendly halogen-free electric vehicle conductive charging system and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826059A (en) * | 2016-06-09 | 2016-08-03 | 苏州高精特专信息科技有限公司 | High-overload transformer |
| CN105826053A (en) * | 2016-06-09 | 2016-08-03 | 苏州高精特专信息科技有限公司 | Low-voltage coil and high-voltage coil for dry type transformer |
| CN106098332A (en) * | 2016-06-09 | 2016-11-09 | 苏州高精特专信息科技有限公司 | A kind of transformator low-voltage coil and high-tension coil |
| CN106085216A (en) * | 2016-06-21 | 2016-11-09 | 江苏科技大学 | A kind of organic silicon rubber Base Metal hot-working protective coating |
| CN106099659A (en) * | 2016-08-29 | 2016-11-09 | 四川行之智汇知识产权运营有限公司 | Cable is stablized mount type top and is imported and exported formula distribution box |
| CN106253091A (en) * | 2016-08-29 | 2016-12-21 | 四川行之智汇知识产权运营有限公司 | Internal layer protection type regulator cubicle based on anti-pull part |
| CN106243999A (en) * | 2016-08-29 | 2016-12-21 | 四川行之智汇知识产权运营有限公司 | By the preparation technology of overcoat inside distribution box |
| CN106336800A (en) * | 2016-08-29 | 2017-01-18 | 四川行之智汇知识产权运营有限公司 | Protective layer used for inner side of power distribution box |
| CN106349927A (en) * | 2016-08-29 | 2017-01-25 | 四川行之智汇知识产权运营有限公司 | Coating process of protective layer for electrical cabinet |
| CN106374352A (en) * | 2016-08-29 | 2017-02-01 | 四川行之智汇知识产权运营有限公司 | Protection layer-based metal-enclosed power distribution cabinet with top inlet/outlet |
| CN107069473A (en) * | 2017-06-12 | 2017-08-18 | 国网山东省电力公司平原县供电公司 | A kind of insulating environment-friendly distribution box |
| CN107266865A (en) * | 2017-08-03 | 2017-10-20 | 安徽华能集团电器有限公司 | A kind of transformer epoxy resin insulation material |
| CN111057418A (en) * | 2019-11-28 | 2020-04-24 | 国网山东省电力公司经济技术研究院 | Power transformer insulating layer and preparation method thereof |
| CN112552562A (en) * | 2020-12-14 | 2021-03-26 | 深圳市乐普泰科技股份有限公司 | Ultralow temperature resistant rubber foam material and preparation method thereof |
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