CN112825284A - Production process of high-current high-voltage bushing of glass fiber reinforced plastic transformer - Google Patents
Production process of high-current high-voltage bushing of glass fiber reinforced plastic transformer Download PDFInfo
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- CN112825284A CN112825284A CN201911144430.XA CN201911144430A CN112825284A CN 112825284 A CN112825284 A CN 112825284A CN 201911144430 A CN201911144430 A CN 201911144430A CN 112825284 A CN112825284 A CN 112825284A
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- 229920005989 resin Polymers 0.000 claims abstract description 49
- 239000011347 resin Substances 0.000 claims abstract description 49
- 239000000843 powder Substances 0.000 claims abstract description 33
- 238000005266 casting Methods 0.000 claims abstract description 29
- 239000004593 Epoxy Substances 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 239000003822 epoxy resin Substances 0.000 claims abstract description 11
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 11
- 125000002723 alicyclic group Chemical group 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims abstract description 10
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- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 238000007872 degassing Methods 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- MUTGBJKUEZFXGO-OLQVQODUSA-N (3as,7ar)-3a,4,5,6,7,7a-hexahydro-2-benzofuran-1,3-dione Chemical group C1CCC[C@@H]2C(=O)OC(=O)[C@@H]21 MUTGBJKUEZFXGO-OLQVQODUSA-N 0.000 claims description 3
- YWVFNWVZBAWOOY-UHFFFAOYSA-N 4-methylcyclohexane-1,2-dicarboxylic acid Chemical compound CC1CCC(C(O)=O)C(C(O)=O)C1 YWVFNWVZBAWOOY-UHFFFAOYSA-N 0.000 claims description 3
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- XFUOBHWPTSIEOV-UHFFFAOYSA-N bis(oxiran-2-ylmethyl) cyclohexane-1,2-dicarboxylate Chemical compound C1CCCC(C(=O)OCC2OC2)C1C(=O)OCC1CO1 XFUOBHWPTSIEOV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
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- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
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- 229910052573 porcelain Inorganic materials 0.000 claims description 3
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- 239000002245 particle Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 abstract description 7
- 238000004880 explosion Methods 0.000 abstract description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 4
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Bodies (AREA)
Abstract
The invention discloses a production process of a high-current high-voltage bushing of a glass fiber reinforced plastic transformer, which belongs to the technical field of transformer equipment, and comprises the steps of preparation of a capacitor core, assembly of the capacitor core, electrical test, appearance inspection and the like, so that the high-current high-voltage bushing of the glass fiber reinforced plastic transformer can realize high mechanical strength, less insulating media, stable dielectric loss, advanced technology of similar products, stable operation and no danger such as ignition, explosion and the like, the epoxy casting resin adopts powder fillers, the manufacturing cost of the resin can be greatly reduced, the mechanical property and the heat conductivity of the product can be greatly improved due to the dispersion in the resin, the shrinkage caused by cold and hot is reduced, so that the high-voltage bushing product is more compact, the optimal performance of the high-voltage bushing product is ensured, and the alicyclic epoxy resin adopted by the epoxy casting resin has good weather resistance and high resin purity, does not contain chlorine and sodium plasma, has higher dielectric property and can meet the use requirements in the field of electrical equipment.
Description
Technical Field
The invention relates to the technical field of transformer equipment, in particular to a production process of a high-current high-voltage bushing of a glass fiber reinforced plastic transformer.
Background
Along with the continuous increase of the power demand in China, the requirement on power supply service with safety and high quality is higher and higher, the requirement on the number of times of failures such as power failure, power failure and power outage is lower and lower, the potential safety hazard is higher in the using process of the conventional sleeve, the maintenance cost is higher, accidents such as irregular power failure, sleeve explosion and injury to people are easy to happen, and therefore explosion-proof, shock-proof, pollution-free and environment-friendly high-voltage sleeves need to be developed.
The general outdoor high-voltage bushing adopts ceramic products, and the high-voltage bushing of the epoxy product has the advantages of light weight, small volume, good impact resistance and the like, is simple and convenient to manufacture, and has excellent mechanical properties and electrical properties.
The quality of the high-voltage bushing depends to a large extent on the insulating material used in the high-voltage bushing, wherein the selection of the resin material is rather the final manifestation of the bushing performance. However, no suitable type of epoxy resin is currently available for the preparation of high voltage bushings.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a production process of a high-current high-voltage bushing of a glass fiber reinforced plastic transformer, which can realize high mechanical strength, less insulating media, stable dielectric loss, advanced technology of similar products, stable operation, no danger of fire, explosion and the like, the manufacturing cost of the resin can be greatly reduced by adopting powder fillers for epoxy casting resin, the mechanical property and the thermal conductivity of the product can be greatly improved by dispersing the powder fillers in the resin, and the shrinkage caused by cold and heat is reduced, so that the high-voltage bushing product is more compact, the optimal performance of the high-voltage bushing product is ensured, the alicyclic epoxy resin adopted by the epoxy casting resin has good weather resistance, high resin purity, no chlorine, sodium and other ions, higher dielectric property and can meet the use requirements in the field of electrical equipment.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A production process of a high-current high-voltage bushing of a glass fiber reinforced plastic transformer specifically comprises the following steps:
s1, preparation of the capacitor core: rolling glass fiber in an annular splicing mode, putting the rolled core body into a vacuum tank, performing dehydration treatment, pouring epoxy casting resin on the core body after dehydration, curing, and taking out of the tank;
s2, assembling of the capacitor core: after the conductor is arranged on the manufactured capacitor core, a flange, a gland and a porcelain bushing are assembled;
s3, electrical test;
and S4, appearance inspection.
Further, in the rolling in S1, the glass fiber is rolled to a predetermined thickness by a rolling device with a tension of 8kg in a circumferential splicing manner, and after a layer of aluminum foil is covered and connected in a circumferential direction, the connection position of the aluminum foil is welded by an electric iron of 80W, and the operation is repeated until the end of the glass fiber is locked at a predetermined layer thickness, thereby completing the rolling.
Further, the dehydration treatment in S1 is to place the rolled core body into a vacuum tank, control the temperature at 150 ℃ and the vacuum degree at 50Pa, perform dehydration treatment, and after 80 hours, cool the core body to 90 ℃ and the vacuum degree at 2 Pa.
Further, the casting vacuum degree in the step S1 cannot exceed 200Pa, and after the casting is completed, the vacuum tank needs to be broken to make the pressure of the vacuum tank reach the atmospheric pressure.
Further, in the curing process described in S1, it is to be ensured that the temperatures at the two ends are higher than the temperature at the middle to ensure that the two ends are cured toward the middle, and the temperature control process in the curing process sequentially includes that the temperatures at the two ends are 90 ℃, the temperature at the center is 80 ℃, the temperature is maintained for 3 hours, the temperatures at the two ends are 100 ℃, the temperature at the center is 90 ℃, the temperature at the center is 3 hours, the temperatures at the two ends are 110 ℃, the temperature at the center is 100 ℃, the temperature is maintained for 5 hours, the temperatures at the two ends are 120 ℃, the temperature at the center is 110 ℃, the temperature is maintained for 3 hours, the temperatures at the two ends are 130 ℃, the temperature at the center is 120 ℃, the temperature is maintained for 4 hours, the temperatures at the two.
Further, the preparation method of the epoxy casting resin comprises the following steps:
s11, pretreating powder: drying the impurity-free powder, spreading the wet powder on a metal plate of an oven to form a thin layer, wherein the thickness of the thin layer of the powder is less than 150mm, starting the oven to dry the powder, wherein the drying temperature is 130-150 ℃, the drying time is 12-24h, and cooling to 60-80 ℃ for later use after drying;
s12, preheating: respectively placing the resin and the dried powder in an oven to preheat to 60-80 ℃, and preserving heat for the next step;
s13, mixing and degassing: adding 100 parts by mass of resin into a mixing tank, starting stirring, and slowly adding 350 parts by mass and 450 parts by mass of powder into the mixing tank; stirring the mixture in the mixing tank under the condition of vacuum pumping, wherein the vacuum degree is 1-10mbar, the stirring time is 2-3h, and the stirring speed is 50 rpm, so that volatile components, residual moisture and gas in the mixture are removed;
s14, cooling: and after the mixture in the mixing tank is mixed, cooling the mixture in the mixing tank to 40-60 ℃, recovering the normal pressure, adding a curing agent and an accelerator into the mixing tank, continuously stirring for 30min, and keeping the temperature of the mixture at 40-50 ℃ to obtain the required epoxy casting resin.
Furthermore, the resin is alicyclic epoxy resin, and the alicyclic epoxy resin is one or a mixture of several of cyclohexane-1, 2-dicarboxylic acid diglycidyl ester, polypropylene glycol and polymers of formaldehyde, epichlorohydrin and phenol.
Furthermore, the powder is silicon dioxide with the particle size of 0.02-50 um.
Further, the curing agent is hexahydrophthalic anhydride and/or hexahydro-4-methylphthalic acid, and the adding amount is 75-88 parts by mass.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the high-voltage bushing produced by the production process has the advantages of high mechanical strength, less insulating medium, stable medium loss, advanced technology of similar products, stable operation, no danger of fire, explosion and the like.
(2) According to the epoxy casting resin, the addition amount of the powder accounts for 60-70% of the total mass of the casting resin, the powder filler can greatly reduce the manufacturing cost of the resin, the mechanical property and the thermal conductivity of the product can be greatly improved due to the powder filler dispersed in the resin, and the shrinkage caused by cold and heat is reduced, so that the high-voltage bushing product is tighter, and the optimal performance of the high-voltage bushing product is ensured.
(3) The epoxy casting resin adopts alicyclic epoxy resin which is used as an outdoor epoxy system resin, has good weather resistance and high resin purity, does not contain chlorine, sodium and other ions, and has higher dielectric property. The final high-voltage bushing product can be ensured to have excellent weather resistance and dielectric property, and the use requirement in the field of electrical equipment can be met.
(4) In the preparation method, in the mixing and degassing operation process, the volatile gas in the resin is discharged by adopting vacuumizing and degassing, so that the content of volatile substances in the final casting resin product is ensured to be extremely low, and the environmental protection of the casting resin and the high-pressure sleeve product thereof is ensured.
Drawings
FIG. 1 is a flow chart of the method steps of the present invention.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, a process for producing a high-current high-voltage bushing of a glass fiber reinforced plastic transformer specifically includes the following steps:
s1, preparation of the capacitor core: rolling glass fiber in an annular splicing mode, putting the rolled core body into a vacuum tank, performing dehydration treatment, pouring epoxy casting resin on the core body after dehydration, curing, and taking out of the tank;
s2, assembling of the capacitor core: after the conductor is arranged on the manufactured capacitor core, a flange, a gland and a porcelain bushing are assembled;
s3, electrical test;
and S4, appearance inspection.
In the rolling in the S1, the glass fiber is rolled to a specified thickness by using rolling equipment in an annular splicing mode with the tension of 8kg, an upper layer of aluminum foil is covered, an 80W electric iron is used for welding the lap joint of the aluminum foil after the lap joint of the upper layer of aluminum foil is overlapped, and the operation is repeated until the end of the glass fiber is locked by a specified layer thickness, so that the rolling is completed.
The dehydration treatment in S1 is to put the rolled core body into a vacuum tank, control the temperature at 150 ℃ and the vacuum degree at 50Pa, carry out dehydration treatment, and reduce the temperature to 90 ℃ after 80h and the vacuum degree at 2 Pa.
And the casting vacuum degree in the S1 can not exceed 200Pa, and the vacuum tank needs to be broken after the casting is finished, so that the pressure of the vacuum tank reaches the atmospheric pressure.
And in the curing process of S1, ensuring that the temperatures of two ends are higher than the temperature of the middle to ensure that the two ends are cured towards the middle, wherein the temperature control process in the curing process sequentially comprises the steps of keeping the temperature at the two ends at 90 ℃, keeping the temperature at the center at 80 ℃ for 3 hours, keeping the temperature at the two ends at 100 ℃, keeping the temperature at the center at 90 ℃ for 3 hours, keeping the temperature at the two ends at 110 ℃, keeping the temperature at the center at 100 ℃ for 5 hours, keeping the temperature at the two ends at 120 ℃, keeping the temperature at the center at 110 ℃ for 3 hours, keeping the temperature at the two ends at 130 ℃, keeping the temperature at the center at 120 ℃ for 4 hours, keeping the temperature at the two ends at 140 ℃, keeping the center at 130.
The preparation method of the epoxy casting resin comprises the following steps:
s11, pretreating powder: drying the impurity-free powder, spreading the wet powder on a metal plate of an oven to form a thin layer, wherein the thickness of the thin layer of the powder is less than 150mm, starting the oven to dry the powder, wherein the drying temperature is 130-150 ℃, the drying time is 12-24h, and cooling to 60-80 ℃ for later use after drying;
s12, preheating: respectively placing the resin and the dried powder in an oven to preheat to 60-80 ℃, and preserving heat for the next step;
s13, mixing and degassing: adding 100 parts by mass of resin into a mixing tank, starting stirring, and slowly adding 350 parts by mass and 450 parts by mass of powder into the mixing tank; stirring the mixture in the mixing tank under the condition of vacuum pumping, wherein the vacuum degree is 1-10mbar, the stirring time is 2-3h, and the stirring speed is 50 rpm, so that volatile components, residual moisture and gas in the mixture are removed;
s14, cooling: and after the mixture in the mixing tank is mixed, cooling the mixture in the mixing tank to 40-60 ℃, recovering the normal pressure, adding a curing agent and an accelerator into the mixing tank, continuously stirring for 30min, and keeping the temperature of the mixture at 40-50 ℃ to obtain the required epoxy casting resin.
The resin is alicyclic epoxy resin, and the alicyclic epoxy resin is one or a mixture of several of cyclohexane-1, 2-dicarboxylic acid diglycidyl ester, polypropylene glycol and polymers of formaldehyde, epichlorohydrin and phenol.
The powder is silicon dioxide with the grain diameter of 0.02-50 um.
The curing agent is hexahydrophthalic anhydride and/or hexahydro-4-methyl phthalic acid, and the addition amount is 75-88 parts by weight.
The high-voltage bushing produced by the production process has the advantages of high mechanical strength, less insulating medium, stable medium loss, advanced technology of similar products, stable operation, no danger of fire, explosion and the like.
According to the epoxy casting resin, the addition amount of the powder accounts for 60-70% of the total mass of the casting resin, the powder filler can greatly reduce the manufacturing cost of the resin, the mechanical property and the thermal conductivity of the product can be greatly improved due to the powder filler dispersed in the resin, and the shrinkage caused by cold and heat is reduced, so that the high-voltage bushing product is tighter, and the optimal performance of the high-voltage bushing product is ensured.
The epoxy casting resin adopts alicyclic epoxy resin which is used as an outdoor epoxy system resin, has good weather resistance and high resin purity, does not contain chlorine, sodium and other ions, and has higher dielectric property. The final high-voltage bushing product can be ensured to have excellent weather resistance and dielectric property, and the use requirement in the field of electrical equipment can be met.
In the preparation method, in the mixing and degassing operation process, the volatile gas in the resin is discharged by adopting vacuumizing and degassing, so that the content of volatile substances in the final casting resin product is ensured to be extremely low, and the environmental protection of the casting resin and the high-pressure sleeve product thereof is ensured.
The foregoing is only a preferred embodiment of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (9)
1. A production process of a high-current high-voltage bushing of a glass fiber reinforced plastic transformer is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, preparation of the capacitor core: rolling glass fiber in an annular splicing mode, putting the rolled core body into a vacuum tank, performing dehydration treatment, pouring epoxy casting resin on the core body after dehydration, curing, and taking out of the tank;
s2, assembling of the capacitor core: after the conductor is arranged on the manufactured capacitor core, a flange, a gland and a porcelain bushing are assembled;
s3, electrical test;
and S4, appearance inspection.
2. The production process of the high-current high-voltage bushing of the glass fiber reinforced plastic transformer as claimed in claim 1, wherein: and the rolling in the S1 is to roll the glass fiber to a specified thickness by using rolling equipment in an annular splicing mode with the tension of 8kg, cover a layer of aluminum foil to be in annular lap joint, weld the lap joint of the aluminum foil by using an electric iron of 80W, and repeatedly operate until the end of the glass fiber is locked by a specified layer thickness to finish the rolling.
3. The production process of the high-current high-voltage bushing of the glass fiber reinforced plastic transformer as claimed in claim 1, wherein: and the dehydration treatment in the S1 is to place the rolled core body into a vacuum tank, control the temperature at 150 ℃ and the vacuum degree at 50Pa, perform dehydration treatment, and reduce the temperature to 90 ℃ after 80 hours and the vacuum degree at 2 Pa.
4. The production process of the high-current high-voltage bushing of the glass fiber reinforced plastic transformer as claimed in claim 1, wherein: and the casting vacuum degree in the S1 can not exceed 200Pa, and the vacuum tank needs to be broken after the casting is finished, so that the pressure of the vacuum tank reaches the atmospheric pressure.
5. The production process of the high-current high-voltage bushing of the glass fiber reinforced plastic transformer as claimed in claim 1, wherein: and in the curing process in the S1, the temperature at two ends is ensured to be higher than the temperature at the middle, so that the two ends are cured towards the middle, the temperature control process in the curing process sequentially comprises that the temperature at two ends is 90 ℃, the temperature at the center is 80 ℃ and lasts for 3 hours, the temperature at two ends is 100 ℃, the temperature at the center is 90 ℃, the temperature at two ends is 3 ℃, the temperature at the center is 100 ℃, the temperature at two ends is 5 hours, the temperature at two ends is 120 ℃, the temperature at the center is 110 ℃ and lasts for 3 hours, the temperature at two ends is 130 ℃, the temperature at the center is 120 ℃ and lasts for 4 hours, the temperature at two ends is 140 ℃, the temperature at the center is 130 ℃ and lasts for 5 hours, the temperature at two.
6. The production process of the high-current high-voltage bushing of the glass fiber reinforced plastic transformer as claimed in claim 1, wherein: the preparation method of the epoxy casting resin comprises the following steps:
s11, pretreating powder: drying the impurity-free powder, spreading the wet powder on a metal plate of an oven to form a thin layer, wherein the thickness of the thin layer of the powder is less than 150mm, starting the oven to dry the powder, wherein the drying temperature is 130-150 ℃, the drying time is 12-24h, and cooling to 60-80 ℃ for later use after drying;
s12, preheating: respectively placing the resin and the dried powder in an oven to preheat to 60-80 ℃, and preserving heat for the next step;
s13, mixing and degassing: adding 100 parts by mass of resin into a mixing tank, starting stirring, and slowly adding 350 parts by mass and 450 parts by mass of powder into the mixing tank; stirring the mixture in the mixing tank under the condition of vacuum pumping, wherein the vacuum degree is 1-10mbar, the stirring time is 2-3h, and the stirring speed is 50 rpm, so that volatile components, residual moisture and gas in the mixture are removed;
s14, cooling: and after the mixture in the mixing tank is mixed, cooling the mixture in the mixing tank to 40-60 ℃, recovering the normal pressure, adding a curing agent and an accelerator into the mixing tank, continuously stirring for 30min, and keeping the temperature of the mixture at 40-50 ℃ to obtain the required epoxy casting resin.
7. The production process of the high-current high-voltage bushing of the glass fiber reinforced plastic transformer as claimed in claim 6, wherein: the resin is alicyclic epoxy resin, and the alicyclic epoxy resin is one or a mixture of more of cyclohexane-1, 2-dicarboxylic acid diglycidyl ester, polypropylene glycol and polymers of formaldehyde, epichlorohydrin and phenol.
8. The production process of the high-current high-voltage bushing of the glass fiber reinforced plastic transformer as claimed in claim 6, wherein: the powder is silicon dioxide with the particle size of 0.02-50 um.
9. The production process of the high-current high-voltage bushing of the glass fiber reinforced plastic transformer as claimed in claim 6, wherein: the curing agent is hexahydrophthalic anhydride and/or hexahydro-4-methylphthalic acid, and the addition amount is 75-88 parts by mass.
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| CN201911144430.XA CN112825284A (en) | 2019-11-20 | 2019-11-20 | Production process of high-current high-voltage bushing of glass fiber reinforced plastic transformer |
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| CN201911144430.XA CN112825284A (en) | 2019-11-20 | 2019-11-20 | Production process of high-current high-voltage bushing of glass fiber reinforced plastic transformer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104262908A (en) * | 2014-10-23 | 2015-01-07 | 吴江固德电材系统股份有限公司 | Preparation method for epoxy cast resin of alternating current high-voltage sleeve |
| CN105070496A (en) * | 2015-07-24 | 2015-11-18 | 南京电气高压套管有限公司 | Glass fiber reinforced large-current transformer bushing and production method thereof |
| CN105206380A (en) * | 2015-07-24 | 2015-12-30 | 南京电气高压套管有限公司 | Glass fiber reinforced plastic transformer bushing with directly-cured core and production method of glass fiber reinforced plastic transformer bushing |
-
2019
- 2019-11-20 CN CN201911144430.XA patent/CN112825284A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104262908A (en) * | 2014-10-23 | 2015-01-07 | 吴江固德电材系统股份有限公司 | Preparation method for epoxy cast resin of alternating current high-voltage sleeve |
| CN105070496A (en) * | 2015-07-24 | 2015-11-18 | 南京电气高压套管有限公司 | Glass fiber reinforced large-current transformer bushing and production method thereof |
| CN105206380A (en) * | 2015-07-24 | 2015-12-30 | 南京电气高压套管有限公司 | Glass fiber reinforced plastic transformer bushing with directly-cured core and production method of glass fiber reinforced plastic transformer bushing |
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Application publication date: 20210521 |