CN103390488A - Vacuum drying method for power transformer body - Google Patents
Vacuum drying method for power transformer body Download PDFInfo
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- CN103390488A CN103390488A CN2013103320929A CN201310332092A CN103390488A CN 103390488 A CN103390488 A CN 103390488A CN 2013103320929 A CN2013103320929 A CN 2013103320929A CN 201310332092 A CN201310332092 A CN 201310332092A CN 103390488 A CN103390488 A CN 103390488A
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Abstract
The invention relates to the technical field of transformer vacuum drying, in particular to a vacuum drying method for a power transformer body. The method comprises the following steps of (1), warming preheating processing: opening a steam valve of a heating calandria and warming the interior of a tank to enable the temperature to rise evenly, wherein the warming speed is 15 DEG C per hour, the warming time is 1-6 hours, and the furnace temperature is controlled to be 100-110 DEG C; (2), vacuumizing once per hour in the step (1), keeping the vacuum degree of 0.04 Mpa for 10-15 minutes, and stopping the vacuumizing and continuously heating; and (3) uniformly reducing the pressure in the vacuum tank evenly level by level after the preheating is finished, and keeping the vacuum degree of 0.02-0.05Mpa for 1-2 hours. According to the vacuum drying method for the power transformer body, vacuum drying processing is performed on the transformer body by heating a vacuum drying system, the drying time is short, the drying efficiency is high, the drying effect is good, and the electrical insulation strength and the product quality are effectively improved.
Description
Technical field
The present invention relates to the transformer vacuum technical field of drying, be specifically related to the vacuum drying treatment method of power transformer device body.
Background technology
As everyone knows, the device of transformer a lot of solid insulating materials that distributed with it, for example, and the turn-to-turn insulation of coil, stay, cushion block, laminated paper board trim ring and fiber core etc., these insulating material are all by cellulosic insulating material.An inherent characteristic of insulating material is exactly after making moist or soaking, and can very seriously affect the water content of electrical strength, dielectric loss and the oil of material medium.Therefore, the new transformer that assembles must be processed through super-dry before dispatching from the factory, and, to remove moisture and the gas in insulating material, makes within its water content is controlled at the scope of requirement, to guarantee transformer, enough dielectric strengths is arranged.But traditional dry technology heating-up temperature is low, inhomogeneous, the processing time is long, transformer that still can not the serious watered and wetting of processor body; Drying effect is often not satisfactory.
Summary of the invention
The purpose of this invention is to provide a kind of drying time short, drying efficiency is high, and drying effect is good, effectively improves the vacuum drying treatment method of the power transformer device body of electric insulation intensity and product quality.
In order to solve the existing problem of background technology, the present invention is by the following technical solutions: the vacuum drying treatment method of power transformer device body comprises the following steps:
(1), intensification the pre-heat treatment: open the steam valve of heating calancria, make temperature in tank evenly increase, programming rate is 15 ℃/h, and the heating-up time is 1～6h, and controlling the furnace temperature temperature is 100～110 ℃;
(2), in described step (), per hour take out vacuum one time, vacuum degree is 0.04Mpa, keeps 10～15min, then removes vacuum and continues heating;
(3), preheating complete after, reduce equably, step by step the vacuum tank internal pressure, vacuum degree is 0.02～0.05Mpa, keeps 1～2h;
(4), evenly reducing vacuum degree is 1.33 * 10
3Pa, vacuumize continuously until the continuous 3 h evaporated condensation waters of condenser are emitted;
(5), stopped heating, remove vacuum, open the tank door, prepare arrangement and the installation of device body.
The present invention has following beneficial effect: the vacuum drying treatment method of power transformer device body of the present invention, by the heating, vacuum drying system, the device body of transformer is carried out vacuum drying treatment, its drying time is short, drying efficiency is high, and drying effect is good, effectively improves electric insulation intensity and product quality.In addition, the present invention has the characteristics such as technique is simple, easy and simple to handle, mainly is applicable to the vacuum drying treatment of middle-size and small-size oil-immersed power transformer device body.
Embodiment
Below the present invention will be further described in detail.
Embodiment one: below voltage 10KV level, capacity is 500Kva and following transformer;
The vacuum drying treatment method of power transformer device body comprises the following steps:
(1), intensification the pre-heat treatment: open the steam valve of heating calancria, make temperature in tank evenly increase, programming rate is 15 ℃/h, and the heating-up time is 1h, and controlling the furnace temperature temperature is 100 ℃;
(2), in described step (), per hour take out vacuum one time, vacuum degree is 0.04Mpa, keeps 10min, then removes vacuum and continues heating, the purpose of doing like this is for preventing that iron core from getting rusty;
(3), preheating complete after, reduce equably, step by step the vacuum tank internal pressure, vacuum degree is 0.02Mpa, keeps 1h;
(4), evenly reducing vacuum degree is 1.33 * 10
3Pa, vacuumize continuously until the continuous 3 h evaporated condensation waters of condenser are emitted;
(5), stopped heating, remove vacuum, open the tank door, prepare arrangement and the installation of device body, need to prove, product will assemble and oiling in 6 hours after going out tank, otherwise need processing again.
Embodiment two: below voltage 10KV level, capacity is the transformer of 1000Kva;
The vacuum drying treatment method of power transformer device body comprises the following steps:
(1), intensification the pre-heat treatment: open the steam valve of heating calancria, make temperature in tank evenly increase, programming rate is 15 ℃/h, and the heating-up time is 4h, and controlling the furnace temperature temperature is 105 ℃;
(2), in described step (), per hour take out vacuum one time, vacuum degree is 0.04Mpa, keeps 13min, then removes vacuum and continues heating;
(3), preheating complete after, reduce equably, step by step the vacuum tank internal pressure, vacuum degree is 0.04Mpa, keeps 1.5h;
(4), evenly reducing vacuum degree is 1.33 * 10
3Pa, vacuumize continuously until the continuous 3 h evaporated condensation waters of condenser are emitted;
(5), stopped heating, remove vacuum, open the tank door, prepare arrangement and the installation of device body.
Embodiment three: below voltage 10KV level, capacity is the transformer of 2500Kva;
The vacuum drying treatment method of power transformer device body comprises the following steps:
(1), intensification the pre-heat treatment: open the steam valve of heating calancria, make temperature in tank evenly increase, programming rate is 15 ℃/h, and the heating-up time is 6h, and controlling the furnace temperature temperature is 110 ℃;
(2), in described step (), per hour take out vacuum one time, vacuum degree is 0.04Mpa, keeps 15min, then removes vacuum and continues heating;
(3), preheating complete after, reduce equably, step by step the vacuum tank internal pressure, vacuum degree is 0.05Mpa, keeps 2h;
(4), evenly reducing vacuum degree is 1.33 * 10
3Pa, vacuumize continuously until the continuous 3 h evaporated condensation waters of condenser are emitted;
(5), stopped heating, remove vacuum, open the tank door, prepare arrangement and the installation of device body.
Explanation is finally, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, other modifications that those of ordinary skills make technical scheme of the present invention or be equal to replacement, only otherwise break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of claim scope of the present invention.
Claims (1)
1. the vacuum drying treatment method of power transformer device body, is characterized in that, comprises the following steps:
(1), intensification the pre-heat treatment: open the steam valve of heating calancria, make temperature in tank evenly increase, programming rate is 15 ℃/h, and the heating-up time is 1～6h, and controlling the furnace temperature temperature is 100～110 ℃;
(2), in described step (), per hour take out vacuum one time, vacuum degree is 0.04Mpa, keeps 10～15min, then removes vacuum and continues heating;
(3), preheating complete after, reduce equably, step by step the vacuum tank internal pressure, vacuum degree is 0.02～0.05Mpa, keeps 1～2h;
(4), evenly reducing vacuum degree is 1.33 * 10
3Pa, vacuumize continuously until the continuous 3 h evaporated condensation waters of condenser are emitted;
(5), stopped heating, remove vacuum, open the tank door, prepare arrangement and the installation of device body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103320929A CN103390488A (en) | 2013-08-02 | 2013-08-02 | Vacuum drying method for power transformer body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103320929A CN103390488A (en) | 2013-08-02 | 2013-08-02 | Vacuum drying method for power transformer body |
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| CN103390488A true CN103390488A (en) | 2013-11-13 |
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| CN2013103320929A Pending CN103390488A (en) | 2013-08-02 | 2013-08-02 | Vacuum drying method for power transformer body |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206409A (en) * | 2015-10-23 | 2015-12-30 | 昆明耀龙置信变压器制造有限公司 | Production process of oil-immersed transformer |
| CN105575618A (en) * | 2016-01-07 | 2016-05-11 | 国网辽宁省电力有限公司锦州供电公司 | Vacuum drying and detecting method for transformer body |
| CN107808771A (en) * | 2017-12-01 | 2018-03-16 | 国网浙江省电力有限公司 | HT testing transformer insulation heat treatment system and its heat treatment method |
| CN109166722A (en) * | 2018-09-19 | 2019-01-08 | 天津市百利纽泰克电气科技有限公司 | A kind of technique improving oil-immersed transformer coil mechanical strength |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0837111A (en) * | 1994-07-25 | 1996-02-06 | Toshiba Corp | Transporter for site assembled transformer |
| CN102997618A (en) * | 2012-12-17 | 2013-03-27 | 四川省晶源电气设备制造有限公司 | Drying process for preventing dried iron core from rusting |
-
2013
- 2013-08-02 CN CN2013103320929A patent/CN103390488A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0837111A (en) * | 1994-07-25 | 1996-02-06 | Toshiba Corp | Transporter for site assembled transformer |
| CN102997618A (en) * | 2012-12-17 | 2013-03-27 | 四川省晶源电气设备制造有限公司 | Drying process for preventing dried iron core from rusting |
Non-Patent Citations (3)
| Title |
|---|
| 张文: "变压器、电抗器干燥", 《科技资讯》 * |
| 肖海宾: "变压法在大型电力变压器干燥过程中的应用", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
| 邓颖: "变压器绕组干燥处理的工艺方法", 《高压电器》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206409A (en) * | 2015-10-23 | 2015-12-30 | 昆明耀龙置信变压器制造有限公司 | Production process of oil-immersed transformer |
| CN105575618A (en) * | 2016-01-07 | 2016-05-11 | 国网辽宁省电力有限公司锦州供电公司 | Vacuum drying and detecting method for transformer body |
| CN107808771A (en) * | 2017-12-01 | 2018-03-16 | 国网浙江省电力有限公司 | HT testing transformer insulation heat treatment system and its heat treatment method |
| CN107808771B (en) * | 2017-12-01 | 2020-05-19 | 国网浙江省电力有限公司 | High-voltage test transformer insulation heat treatment system and heat treatment method thereof |
| CN109166722A (en) * | 2018-09-19 | 2019-01-08 | 天津市百利纽泰克电气科技有限公司 | A kind of technique improving oil-immersed transformer coil mechanical strength |
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Application publication date: 20131113 |