CN102543414B - Insulated drying processing method of transformer body - Google Patents
Insulated drying processing method of transformer body Download PDFInfo
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- CN102543414B CN102543414B CN 201210022341 CN201210022341A CN102543414B CN 102543414 B CN102543414 B CN 102543414B CN 201210022341 CN201210022341 CN 201210022341 CN 201210022341 A CN201210022341 A CN 201210022341A CN 102543414 B CN102543414 B CN 102543414B
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- voltage coil
- transformer body
- copper bar
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- 238000001035 drying Methods 0.000 title claims abstract description 36
- 238000003672 processing method Methods 0.000 title claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- 239000010949 copper Substances 0.000 claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 5
- 239000011888 foil Substances 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- RIRXDDRGHVUXNJ-UHFFFAOYSA-N [Cu].[P] Chemical compound [Cu].[P] RIRXDDRGHVUXNJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 abstract description 13
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000007747 plating Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010010 raising Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
- Insulating Of Coils (AREA)
Abstract
The invention discloses an insulated drying processing method of a transformer body, which comprises the following steps of: (1) winding a low-voltage coil foil; (2) winding high-voltage and low-voltage coils; (3) putting into a coil shaping press after the high-voltage and the low-voltage coils with mould cores are loaded in a pressing mould; (4) taking out after the end of drying, tin-plating a low-voltage phase line copper bar and a low-voltage zero line copper bar, connecting the low-voltage phase line copper bar with a phase line bolt and connecting the low-voltage zero line copper bar with a zero line bolt; (5) assembling the transformer body and a lead; (6) sending the transformer body into a hot air circulating oven for drying; and (7) finally detecting. The insulated drying processing method has the beneficial effect that the moisture and the gas in insulating materials are effectively removed, so that the moisture content of the insulating materials is controlled within the limit required by the product quality to ensure short drying time, small equipment investment and low energy consumption under the situation that the transformer has enough insulating strength and running life.
Description
Technical field:
The present invention relates to a kind of transformer technology field, is specifically a kind of insulated drying processing method of transformer body for oil-immersed type transformer.
Background technology
The purpose of transformer dry is the moisture of removing in TRANSFORMER INSULATING MATERIAL, increases its insulation resistance, improves its flashover voltage.The transformer of voltage more than 3kV all must carry out drying to be processed.
Transformer body is mainly assemblied by unshakable in one's determination and coil and insulating material, after assembling, before adding transformer oil, must pass through dry treatment process, to remove moisture and the gas in insulating material, make within its water content is controlled at the limit that product quality requires, to guarantee transformer, enough dielectric strengths and service life are arranged.To high-tension transformer, require the water content of its insulating material in 0.5%.
The oil-filled transformer insulation dry of present most 10KV is processed and is adopted vacuum drying method, i.e. gas clean-up and raising temperature.The purpose of gas clean-up is mainly the pressure of lowering device body surrounding environment, and the moisture that is conducive to like this its fine pore of insulating material becomes steam and spreads from insulating material and move, and discharges from insulating material at last.The main purpose that improves temperature is to improve the steam partial pressure of insulating material, 20 ℃ of the every raisings of insulating material temperature, more than its steam partial pressure can improve twice, so in the situation that water content is identical, temperature is higher, and diffusion effect is better, and the result of diffusion is that moisture is discharged outside insulating material, thereby improve the degree of drying of insulating part, improve electrical equipment intensity.This method of above prior art has the following disadvantages:
1, because vacuum drying method needs vacuumizing and repeatedly heating repeatedly, and electric pressure is higher, and capacity is larger, number of times repeatedly is more, like this drying time oversize, generally want to be unfavorable for the scheduling of production of streamlined production and manufacturer about 16 hours.
2, this vacuum pressure drying equipment has high input simultaneously, safeguards inconvenience, and the power consumption water consumption is serious, and cost is too high.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of moisture and gas in effectively removing insulating material is provided, make within its water content is controlled at the limit that product quality requires, to guarantee that transformer has in the situation of enough dielectric strengths and service life, the insulated drying processing method of transformer body that drying time is short, equipment investment is little, power consumption is low.
Technical scheme of the present invention is that a kind of insulated drying processing method of transformer body with step of following structure is provided:
(1) the low-voltage coil paper tinsel around: by the amorphous foil winding equipment at mould coiling low-voltage coil in the heart;
(2) high-voltage coil and low-voltage coil closes around outside the complete low-voltage coil of coiling coiling high-tension coil again after the installing insulating assembly;
(3) will pack into the high-voltage coil and low-voltage coil of the mould heart and put into the loop shaping press after press mounting die, high-voltage coil and low-voltage coil is depressed into the outside dimension of regulation along short-axis direction, then use many Bolt to positions of press mounting die, and send into heated-air circulation oven, simultaneously transformer body insulating spare, lead wire insulation part are sent into heated-air circulation oven, baking temperature is 115～125 ℃, and be 5.5～6.5 hours drying time;
(4) take out after oven dry finishes, high-voltage connection is welded on high-tension coil with phosphor-copper, then technological requirement is processed routinely; Low pressure phase line copper bar and the zinc-plated processing of low-voltage zero line copper bar, and low pressure phase line copper bar is connected with the phase line bolt, the low-voltage zero line copper bar is connected with the zero line bolt;
(5) assembling transformer device body and lead-in wire, and must take out heated-air circulation ovens at high-voltage coil and low-voltage coil and all insulating parts and complete in 6 hours;
(6) transformer body is sent into the heated-air circulation oven inner drying, baking temperature is 115～125 ℃, and be 1.5～2.5 hours drying time;
(7) detect at last high insulation against ground resistance 〉=2000M Ω, high-low pressure insulation resistance 〉=2000M Ω, low insulation against ground resistance 〉=1000M Ω, insulation against ground resistance unshakable in one's determination 〉=300M Ω.
Baking temperature in step (3) is 120 ℃, and be 6 hours drying time.
Baking temperature in step (6) is 120 ℃, and be 2 hours drying time.
After adopting above-mentioned steps, the present invention compared with prior art has the following advantages:
1, due to high-voltage coil and low-voltage coil and all insulating parts are sent into heated-air circulation oven, dried by the fire and adopted again high-voltage connection to be welded on high-tension coil with phosphor-copper, low pressure phase line copper bar and the zinc-plated processing of low-voltage zero line copper bar, and low pressure phase line copper bar is connected with the phase line bolt, the low-voltage zero line copper bar is connected with the zero line bolt, so no longer adopt original band water welding, avoid the suction of high-low voltage leads secondary or steam, can guarantee the degree of drying of high-voltage coil and low-voltage coil and all insulating parts.The total time of the secondary drying of the transformer body after high-voltage coil and low-voltage coil and all insulating parts and assembling also about 8 hours, reaches and has shortened drying time, is conducive to the scheduling of production of streamlined production and manufacturer.
2, the heated-air circulation oven input is little, easy to maintenance simultaneously, greatly reduces the power consumption water consumption, and cost is low, also facilitates operator training simultaneously, no longer needs the full-time staff, reduces cost of labor.
Embodiment
The below is described further insulated drying processing method of transformer body of the present invention.
Insulated drying processing method of transformer body of the present invention,
(1) the low-voltage coil paper tinsel around: by the amorphous foil winding equipment at mould coiling low-voltage coil in the heart;
(2) high-voltage coil and low-voltage coil closes around outside the complete low-voltage coil of coiling coiling high-tension coil again after the installing insulating assembly;
(3) will pack into the high-voltage coil and low-voltage coil of the mould heart and put into the loop shaping press after press mounting die, high-voltage coil and low-voltage coil is depressed into the outside dimension of regulation along short-axis direction, the high-voltage coil and low-voltage coil stress balance that can guarantee like this to be pressed, prevent that insulating barrier is destroyed, also can well control the overall dimension of high-voltage coil and low-voltage coil, then use many Bolt to positions of press mounting die, and send into heated-air circulation oven, simultaneously transformer body insulating spare, lead wire insulation part are sent into heated-air circulation oven, baking temperature is 120 ℃, and be 6 hours drying time;
(4) take out after oven dry finishes, high-voltage connection is welded on high-tension coil with phosphor-copper, then technological requirement is processed routinely; This common process comprises removes carbon black, deburring and in the weld wrap insulate.Low pressure phase line copper bar and the zinc-plated processing of low-voltage zero line copper bar, and low pressure phase line copper bar is connected with the phase line bolt, the low-voltage zero line copper bar is connected with the zero line bolt;
(5) assembling transformer device body and lead-in wire, and must take out heated-air circulation ovens at high-voltage coil and low-voltage coil and all insulating parts and complete in 6 hours;
(6) transformer body is sent into the heated-air circulation oven inner drying, baking temperature is 120 ℃, and be 2 hours drying time;
(7) detect at last high insulation against ground resistance 〉=2000M Ω, high-low pressure insulation resistance 〉=2000M Ω, low insulation against ground resistance 〉=1000M Ω, insulation against ground resistance unshakable in one's determination 〉=300M Ω.
Claims (3)
1. insulated drying processing method of transformer body: it is characterized in that:
(1) the low-voltage coil paper tinsel around: by the amorphous foil winding equipment at mould coiling low-voltage coil in the heart;
(2) high-voltage coil and low-voltage coil closes around outside the complete low-voltage coil of coiling coiling high-tension coil again after the installing insulating assembly;
(3) will pack into the high-voltage coil and low-voltage coil of the mould heart and put into the loop shaping press after press mounting die, high-voltage coil and low-voltage coil is depressed into the outside dimension of regulation along short-axis direction, then use many Bolt to positions of press mounting die, and send into heated-air circulation oven, simultaneously transformer body insulating spare, lead wire insulation part are sent into heated-air circulation oven, baking temperature is 115～125 ℃, and be 5.5～6.5 hours drying time;
(4) take out after oven dry finishes, high-voltage connection is welded on high-tension coil with phosphor-copper, then technological requirement is processed routinely; Low pressure phase line copper bar and the zinc-plated processing of low-voltage zero line copper bar, and low pressure phase line copper bar is connected with the phase line bolt, the low-voltage zero line copper bar is connected with the zero line bolt;
(5) assembling transformer device body and lead-in wire, and must take out heated-air circulation ovens at high-voltage coil and low-voltage coil and all insulating parts and complete in 6 hours;
(6) transformer body is sent into the heated-air circulation oven inner drying, baking temperature is 115～125 ℃, and be 1.5～2.5 hours drying time;
(7) detect at last high insulation against ground resistance 〉=2000M Ω, high-low pressure insulation resistance 〉=2000M Ω, low insulation against ground resistance 〉=1000M Ω, insulation against ground resistance unshakable in one's determination 〉=300M Ω.
2. insulated drying processing method of transformer body according to claim 1: it is characterized in that: the baking temperature in step (3) is 120 ℃, and be 6 hours drying time.
3. insulated drying processing method of transformer body according to claim 1: it is characterized in that: the baking temperature in step (6) is 120 ℃, and be 2 hours drying time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210022341 CN102543414B (en) | 2012-02-01 | 2012-02-01 | Insulated drying processing method of transformer body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210022341 CN102543414B (en) | 2012-02-01 | 2012-02-01 | Insulated drying processing method of transformer body |
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| CN102543414A CN102543414A (en) | 2012-07-04 |
| CN102543414B true CN102543414B (en) | 2013-06-19 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103366949A (en) * | 2013-08-02 | 2013-10-23 | 江苏亨特集团华特电气有限公司 | Shaping method of amorphous alloy transformer coil |
| CN107293396B (en) * | 2017-05-19 | 2019-06-18 | 宁波索拉电气有限公司 | A kind of production technology of oil-immersed transformer |
| CN108461268A (en) * | 2018-03-09 | 2018-08-28 | 江苏华辰变压器股份有限公司 | A kind of oil-immersed transformer normal pressure oiling vacuum degassing process |
| CN114649142A (en) * | 2020-12-18 | 2022-06-21 | 特变电工智能电气有限责任公司 | Transformer and production method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4369353A (en) * | 1980-02-19 | 1983-01-18 | Duenke Clarence G | Apparatus and method of drying a transformer |
| CN1050110A (en) * | 1989-09-08 | 1991-03-20 | 天津十九中学校办工厂 | Neon sign electron transformer high voltage package manufacturing process |
| KR100357423B1 (en) * | 1999-11-24 | 2002-10-19 | 박상관 | system for dipping and drying a transformer |
| CN1741210B (en) * | 2005-09-05 | 2010-05-26 | 韶关市韶特电气有限公司 | Dry type electric transformer teeming epoxy resin coil non-cutting technology |
| CN101145443A (en) * | 2007-07-27 | 2008-03-19 | 中电电气集团有限公司 | Amorphous alloy transformer coil winding method |
| CN101567260A (en) * | 2009-02-26 | 2009-10-28 | 山东泰开箱变有限公司 | Process for manufacturing high-pressure subsection cylindrical coil of dry type pouring transformer |
| CN101699586B (en) * | 2009-10-22 | 2013-01-30 | 四川泛华航空仪表电器有限公司 | Insulated impregnating process for high-frequency transformers |
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Address after: 315031 Zhejiang Province, Ningbo City Jiangbei District Fenglin Road No. 22 Patentee after: NINGBO AUX HIGH TECHNOLOGY Co.,Ltd. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: NINGBO AUX HIGH TECHNOLOGY Co.,Ltd. |
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Denomination of invention: Method for drying insulation of transformer body Effective date of registration: 20220121 Granted publication date: 20130619 Pledgee: Agricultural Bank of China Limited Ningbo Yinzhou Branch Pledgor: NINGBO AUX HIGH TECHNOLOGY Co.,Ltd. Registration number: Y2022330000149 |
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Date of cancellation: 20221201 Granted publication date: 20130619 Pledgee: Agricultural Bank of China Limited Ningbo Yinzhou Branch Pledgor: NINGBO AUX HIGH TECHNOLOGY Co.,Ltd. Registration number: Y2022330000149 |
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Address after: No. 22, Fenglin Road, Cicheng Town, Jiangbei District, Ningbo City, Zhejiang Province, 315031 Patentee after: Ningbo Aokes Intelligent Technology Co.,Ltd. Address before: No. 22, Fenglin Road, Cicheng Town, Jiangbei District, Ningbo City, Zhejiang Province, 315031 Patentee before: NINGBO AUX HIGH TECHNOLOGY Co.,Ltd. |