CN102074346A - Drying process of high-voltage current transformer body - Google Patents
Drying process of high-voltage current transformer body Download PDFInfo
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- CN102074346A CN102074346A CN 201010573052 CN201010573052A CN102074346A CN 102074346 A CN102074346 A CN 102074346A CN 201010573052 CN201010573052 CN 201010573052 CN 201010573052 A CN201010573052 A CN 201010573052A CN 102074346 A CN102074346 A CN 102074346A
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Abstract
The invention relates to a drying process of a high-voltage current transformer body, which belongs to the field of high-voltage transformer manufacturing process. The drying process comprises the technical scheme that: the vacuum drying of a current transformer body is carried out by a vacuum drying method, and the vacuum drying process comprises a temperature rise stage, an intermittent vacuum stage, a low vacuum stage, a high vacuum stage and a cooling stage; and water in the high-voltage current transformer body is thoroughly discharged by controlling different stages of temperature, vacuum degree and time, and the drying time of each stage is determined by an insulation thickness and a voltage class. The water in the high-voltage current transformer body is thoroughly discharged by controlling different stages of temperature, vacuum degree and time, so that the water content, hydrogen content, dielectric loss and voltage resistance of the high-voltage current transformer product exceed national standard values, and the high-voltage current transformer has the characteristics of thorough drying, energy saving, time saving and large furnace inlet capacity, is convenient to operate, is safe and the like.
Description
Technical field
The present invention relates to a kind of high-tension current inductor device body drying process, belong to high-voltage mutual inductor manufacturing process field.
Background technology
The high-tension current inductor product is thicker because of device body main insulation material, general vacuumize is difficult to remove its inner deep layer moisture content, the result causes product after operation a period of time, the repair in shop reason is returned in rises such as its water content, hydrogen content, dielectric loss, be difficult to guarantee the quality of product, also become one of technical problem that this area needs to be resolved hurrily.
Summary of the invention
The purpose of this invention is to provide a kind of high-tension current inductor device body drying process, can be thoroughly dry, can shorten drying time again, energy savings solves the problems referred to above that exist in the background technology.
Technical scheme of the present invention is: adopt vacuum drying mode that high-tension current inductor device body is carried out vacuumize, 1. process of vacuum drying is divided into temperature rise period, 2. intermittent vacuum stage, 3. low vacuum stage, 4. high vacuum stage of Fig, 5. temperature-fall period, by control to temperature, vacuum degree and the time of different phase, moisture content in the high-tension current inductor device body is thoroughly discharged, determine by insulation thickness and electric pressure each drying time in stage.
Processing step is as follows more specifically for high-tension current inductor device body drying process:
1. temperature rise period: adopt speed to be warmed up to 105 ± 5 ℃, insulating material is heated up and begin to discharge moisture content smaller or equal to 10 ℃/h;
2. intermittent vacuum stage: by being evacuated down to more than or equal to 0.055MPa, less than 0.08MPa, the moisture content of discharging in the device body is taken away, when removing vacuum, be convenient to moisture content discharge in the material, keep 105 ± 5 ℃ of temperature to come the required energy of moisture content gasification in the supplementary material by heating simultaneously;
3. low vacuum stage:, reduce diffusion and discharge that steam partial pressure around the insulating material helps the insulating material internal moisture by vacuumizing and keep the mode of 0.08MPa;
4. high vacuum stage of Fig: mainly remove the moisture content that is difficult for being evaporated remaining in the insulating material, this part moisture content generally is subjected to the obstruct of outer heavy insulation and the suction-operated of insulating material fiber, is difficult for getting rid of, and gas clean-up also keeps vacuum degree greater than 80Pa;
5. temperature-fall period: after high vacuum stage of Fig finishes, directly do not come out of the stove,, temperature is reduced to below 80 ℃ by 105 ± 5 ℃, remove vacuum and come out of the stove, finish current transformer device body drying through a temperature-fall period.
Determine by insulation thickness and electric pressure each drying time in stage.
Determine that those of ordinary skills can determine the suitable time according to high-tension current inductor insulation thickness and electric pressure, need not special qualification each drying time in stage of the present invention by insulation thickness and electric pressure.
The present invention makes water content, hydrogen content, the withstand voltage GB required value that surpasses of high-tension current inductor product by to high-tension current inductor device body vacuumize different phase temperature, vacuum degree and the control of time.
Beneficial effect of the present invention: by different phase in the vacuumize to the moisture content in the thorough displacer body of the control of temperature, vacuum degree and time, thereby make the water content, hydrogen content, dielectric loss of high-tension current inductor product, the withstand voltage GB required value that surpasses, have dry thoroughly, energy savings, save time, go into characteristics such as the stove amount is big, operation is convenient, safety.
Description of drawings
Fig. 1 is temperature, time, the vacuum degree graph of a relation of the embodiment of the invention.
Among the figure: 1. temperature rise period; 2. intermittent vacuum stage; 3. low vacuum stage; 4. high vacuum stage of Fig; 5. temperature-fall period.
Embodiment
Below in conjunction with accompanying drawing, technical solution of the present invention is described further.
Vacuum drying process of the present invention is that vacuumize is divided into five stages: 1. temperature rise period; 2. intermittent vacuum stage; 3. low vacuum stage; 4. high vacuum stage of Fig; 5. temperature-fall period.The vacuum degree in each stage and temperature are handled by shown in Figure 1, determine by insulation thickness and electric pressure, so just the moisture content in the high-tension current inductor device body thoroughly can be discharged drying time.
Concrete processing step:
1. temperature rise period: adopt speed to be warmed up to 105 ± 5 ℃, insulating material is heated up and begin to discharge moisture content smaller or equal to 10 ℃/h;
2. intermittent vacuum stage: by being evacuated down to 0.055MPa the moisture content of discharging in the device body is taken away, when removing vacuum, be convenient in the material moisture content and discharge, keep 105 ± 5 ℃ of temperature to come in the supplementary material moisture content required energy that gasifies by heating simultaneously;
3. low vacuum stage:, reduce diffusion and discharge that steam partial pressure around the insulating material helps the insulating material internal moisture by vacuumizing and keep the mode of 0.08MPa;
4. high vacuum stage of Fig: mainly remove the moisture content that is difficult for being evaporated remaining in the insulating material, this part moisture content generally is subjected to the obstruct of outer heavy insulation and the suction-operated of insulating material fiber, be difficult for to get rid of, must gas clean-up and keep vacuum degree at 80Pa or higher;
5. temperature-fall period: after high vacuum stage of Fig finishes, cannot directly come out of the stove, must temperature be reduced to below 80 ℃ by 105 ± 5 ℃, can remove vacuum and come out of the stove through a temperature-fall period.The rear surface airborne moisture content of very fast absorption otherwise insulating material is come out of the stove and making moist has reduced drying effect.
Claims (2)
1. high-tension current inductor device body drying means, it is characterized in that adopting vacuum drying mode that current transformer device body is carried out vacuumize, 1. process of vacuum drying is divided into temperature rise period, 2. intermittent vacuum stage, 3. low vacuum stage, 4. high vacuum stage of Fig, 5. temperature-fall period, by control to temperature, vacuum degree and the time of different phase, moisture content in the high-tension current inductor device body is thoroughly discharged, determine by insulation thickness and electric pressure each drying time in stage.
2. the high-tension current inductor device body drying means according to claim 1 is characterized in that processing step is as follows more specifically:
1. temperature rise period: adopt speed to be warmed up to 105 ± 5 ℃, insulating material is heated up and begin to discharge moisture content smaller or equal to 10 ℃/h;
2. intermittent vacuum stage: by being evacuated down to more than or equal to 0.055MPa, less than 0.08MPa, the moisture content of discharging in the device body is taken away, when removing vacuum, be convenient to moisture content discharge in the material, keep 105 ± 5 ℃ of temperature to come the required energy of moisture content gasification in the supplementary material by heating simultaneously;
3. low vacuum stage:, reduce diffusion and discharge that steam partial pressure around the insulating material helps the insulating material internal moisture by vacuumizing and keep the mode of 0.08MPa;
4. high vacuum stage of Fig: mainly remove the moisture content that is difficult for being evaporated remaining in the insulating material, this part moisture content generally is subjected to the obstruct of outer heavy insulation and the suction-operated of insulating material fiber, is difficult for getting rid of, and gas clean-up also keeps vacuum degree greater than 80Pa;
5. temperature-fall period: after high vacuum stage of Fig finishes, directly do not come out of the stove,, temperature is reduced to below 80 ℃ by 105 ± 5 ℃, remove vacuum and come out of the stove, finish current transformer device body drying through a temperature-fall period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010573052XA CN102074346B (en) | 2010-12-06 | 2010-12-06 | Drying process of high-voltage current transformer body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010573052XA CN102074346B (en) | 2010-12-06 | 2010-12-06 | Drying process of high-voltage current transformer body |
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| CN102074346A true CN102074346A (en) | 2011-05-25 |
| CN102074346B CN102074346B (en) | 2012-05-30 |
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| CN201010573052XA Expired - Fee Related CN102074346B (en) | 2010-12-06 | 2010-12-06 | Drying process of high-voltage current transformer body |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048481A (en) * | 2014-06-16 | 2014-09-17 | 广东电网公司电力科学研究院 | Vacuum drying method of electrical equipment |
| CN105977014A (en) * | 2016-06-27 | 2016-09-28 | 河南平高通用电气有限公司 | Drying method of current transformer coil |
| CN107917937A (en) * | 2017-11-21 | 2018-04-17 | 保定天威互感器有限公司 | A kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying |
| CN112069729A (en) * | 2020-08-28 | 2020-12-11 | 福州大学 | Voltage division method of multi-stage insulation dry type current transformer |
| CN113532029A (en) * | 2021-06-24 | 2021-10-22 | 华能伊敏煤电有限责任公司 | Drying device and drying method for insulating and wetting treatment of current transformer with large ampere turns |
| CN113834312A (en) * | 2021-10-11 | 2021-12-24 | 山东泰开互感器有限公司 | Gas phase drying process and device for oil-immersed inverted current transformer |
| 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 |
Citations (5)
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| CN201196896Y (en) * | 2007-12-12 | 2009-02-18 | 天津市三源电力变压器公司 | Vacuum hot oil spraying and drying system of ultra-large transformer |
| CN101517120A (en) * | 2006-09-14 | 2009-08-26 | 株式会社爱发科 | Vacuum evaporation processing equipment |
| CN101634290A (en) * | 2009-08-04 | 2010-01-27 | 上海师范大学 | Method for drying hermetic compressor by ohmic heating |
| CN101692402A (en) * | 2009-09-24 | 2010-04-07 | 保定天威集团有限公司 | Method and device for drying large-scale power transformer |
| CN201478113U (en) * | 2009-09-24 | 2010-05-19 | 保定天威集团有限公司 | Drying device for large power transformer |
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2010
- 2010-12-06 CN CN201010573052XA patent/CN102074346B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517120A (en) * | 2006-09-14 | 2009-08-26 | 株式会社爱发科 | Vacuum evaporation processing equipment |
| CN201196896Y (en) * | 2007-12-12 | 2009-02-18 | 天津市三源电力变压器公司 | Vacuum hot oil spraying and drying system of ultra-large transformer |
| CN101634290A (en) * | 2009-08-04 | 2010-01-27 | 上海师范大学 | Method for drying hermetic compressor by ohmic heating |
| CN101692402A (en) * | 2009-09-24 | 2010-04-07 | 保定天威集团有限公司 | Method and device for drying large-scale power transformer |
| CN201478113U (en) * | 2009-09-24 | 2010-05-19 | 保定天威集团有限公司 | Drying device for large power transformer |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048481A (en) * | 2014-06-16 | 2014-09-17 | 广东电网公司电力科学研究院 | Vacuum drying method of electrical equipment |
| CN104048481B (en) * | 2014-06-16 | 2016-04-27 | 广东电网公司电力科学研究院 | The vacuum drying method of electrical equipment |
| CN105977014A (en) * | 2016-06-27 | 2016-09-28 | 河南平高通用电气有限公司 | Drying method of current transformer coil |
| CN107917937A (en) * | 2017-11-21 | 2018-04-17 | 保定天威互感器有限公司 | A kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying |
| CN112069729A (en) * | 2020-08-28 | 2020-12-11 | 福州大学 | Voltage division method of multi-stage insulation dry type current transformer |
| CN112069729B (en) * | 2020-08-28 | 2022-04-22 | 福州大学 | Voltage division method of multi-stage insulation dry type current transformer |
| 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 |
| CN113532029A (en) * | 2021-06-24 | 2021-10-22 | 华能伊敏煤电有限责任公司 | Drying device and drying method for insulating and wetting treatment of current transformer with large ampere turns |
| CN113834312A (en) * | 2021-10-11 | 2021-12-24 | 山东泰开互感器有限公司 | Gas phase drying process and device for oil-immersed inverted current transformer |
| CN113834312B (en) * | 2021-10-11 | 2022-10-04 | 山东泰开互感器有限公司 | Gas phase drying process and device for oil-immersed inverted current transformer |
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| Publication number | Publication date |
|---|---|
| CN102074346B (en) | 2012-05-30 |
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