CN104269266A - Oil-immersed type transformer non-end-insulation low-voltage foil-winding coil manufacturing technology - Google Patents
Oil-immersed type transformer non-end-insulation low-voltage foil-winding coil manufacturing technology Download PDFInfo
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- CN104269266A CN104269266A CN201410322972.2A CN201410322972A CN104269266A CN 104269266 A CN104269266 A CN 104269266A CN 201410322972 A CN201410322972 A CN 201410322972A CN 104269266 A CN104269266 A CN 104269266A
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Abstract
The invention discloses an oil-immersed type transformer non-end-insulation low-voltage foil-winding coil manufacturing technology includes the steps of A), cutting out a copper foil or aluminum foil coil stock proper in length and width as well as a layer insulation DMD presoaking-cloth coil stock according to requirements; B), mounting and arranging the copper foil or aluminum foil coil stock as well as layer insulation DMD presoaking cloth on a foil winding machine according to the winding sequence; C), welding leading rows on the copper foil or the aluminum foil, and polishing and cleaning the welding positions; D), synchronously winding the copper foil or the aluminum foil as well as the layer insulation DMD presoaking-cloth coil stock; E), mounting a fixture on the wound coil and putting the coil into an oven for molding and curing according to technological requirements. The coil is packaged integrally after the coil winding technology is completed, and mechanical strength and short-circuit resistance strength of the coil are effectively improved. Meanwhile, the DMD presoaking cloth 0.25mm in thickness and better in performance is adopted as layer insulation in the coil structure, production processes are simplified, and reliability of the coil is improved.
Description
Technical field
The present invention relates to coil manufacturing process, the low voltage foil winding coil manufacturing process that especially a kind of oil-filled transformer insulate for no reason.
Background technology
Distribution transformer, refers to the static electrical equipment of one for transmitting AC energy in distribution system according to law of electromagnetic induction conversion alternating voltage and electric current.China's power transformer product generally can be divided into ultra high voltage (750KV and more than), superhigh pressure (500KV) transformer, 220-110KV transformer, 35KV and following transformer by electric pressure.Distribution transformer typically refers to and operates in that electric pressure in power distribution network is 10-35KV, capacity is 6300KVA and following power transformer of powering directly to terminal use.
In the industry, the oil immersion-type distribution transformer of 10 ~ 35kV of current production, when low-voltage coil employing Copper Foil or aluminium foil coiling, low voltage foil winding coil manufacturing process makes the end insulation coiling simultaneously at layer insulation and foil and foil two ends.Coil-end insulation makes mainly widens layer insulation width, carries out repeatedly flanging make end insulation by design end insulation width and foil thickness folding brake to layer insulation two ends, is secondly to make the insulation of rolling billot coiling end with cable Paper or cardboard.First end insulation manufacturing process is which increased, and cable paper layer insulation is thiner the hidden danger punctured by the foil of the even residual burr of out-of-flatness, secondly low voltage foil winding coil is directly overlap around or be set with high-tension coil after winding, and is not form complete paper tinsel around steel three-dimensional-structure.
Summary of the invention
The object of this invention is to provide a kind of coil mechanical strength of producing good, anti-short circuit capability is strong, the low voltage foil winding coil manufacturing process that the simple oil-filled transformer of manufacturing process insulate for no reason.
For achieving the above object, the technical solution adopted in the present invention is: the low voltage foil winding coil manufacturing process that a kind of oil-filled transformer insulate for no reason, comprises the following steps:
A, the Copper Foil cutting out appropriate length and width as required or aluminium foil foil coiled strip and layer insulation DMD prepreg cloth coiled strip;
B, on foil winding equipment, according to coiling, arrangement Copper Foil or aluminium foil foil coiled strip and layer insulation DMD prepreg cloth are installed in proper order;
C, on Copper Foil or aluminium foil welding draw row, simultaneously to weld carry out polishing clear up;
D, Copper Foil or aluminium foil and layer insulation DMD prepreg cloth coiled strip be coiling simultaneously on foil winding equipment;
E, the coil that coiling is good is loaded onto fixture, put into baker according to technological requirement and carry out forming and hardening.
Preferably, the DMD prepreg cloth described in steps A, its thickness is 0.25mm, and its width is less than coil height 2mm.
Preferably, the DMD prepreg cloth described in steps A, its width exceeds the every limit 10 ~ 20mm of coil foil.
Preferably, after fixture loaded onto by the coil described in step e, put into baker and be progressively warming up to 155 DEG C, and keep this temperature to continue baking 5 ~ 8 hours, until its solidification.
After the present invention adopts above-mentioned production technology, employing overall package operation after coil winding completes, mechanical strength and the Short Circuit withstand intensity of coil obtain effective raising.Meanwhile, more firmly solid owing to adopting in loop construction, the DMD prepreg cloth that the 0.25mm that performance is more superior is thick does layer insulation, and does not use traditional end insulation, simplifies production process, improves the reliability of coil.Present invention process is simple and practical, and coil mechanical strength is good, and anti-short circuit capability is strong, improves coil overall security.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail:
The low voltage foil winding coil manufacturing process that oil-filled transformer insulate for no reason, comprises the following steps:
A, the Copper Foil cutting out appropriate length and width as required or aluminium foil foil coiled strip and layer insulation DMD prepreg cloth coiled strip;
B, on foil winding equipment, according to coiling, arrangement Copper Foil or aluminium foil foil coiled strip and layer insulation DMD prepreg cloth are installed in proper order;
C, on Copper Foil or aluminium foil welding draw row, simultaneously to weld carry out polishing clear up;
D, Copper Foil or aluminium foil and layer insulation DMD prepreg cloth coiled strip be coiling simultaneously on foil winding equipment;
E, the coil that coiling is good is loaded onto fixture, put into baker according to technological requirement and carry out forming and hardening.
Preferably, the DMD prepreg cloth described in steps A, its thickness is 0.25mm, and its width is less than coil height 2mm.
Preferably, the DMD prepreg cloth described in steps A, its width exceeds the every limit 10 ~ 20mm of coil foil.
Preferably, after fixture loaded onto by the coil described in step e, put into baker and be progressively warming up to 155 DEG C, and keep this temperature to continue baking 5 ~ 8 hours, until its solidification.
Embodiment:
Low voltage foil winding coil adopts the thick DMD prepreg cloth of 0.25mm to do layer insulation, by design drawing customization DMD prepreg cloth coiled strip (high-2mm of width=coil), DMD prepreg cloth width grows the every limit 10-20mm of coil foil, coiling simultaneously together with foil on foil winding equipment, coil winds rear tight around the first-class fixture of half lap one deck DMD preimpregnation strap, put into baker and be progressively warming up to 155 ° of baking 5-8 hour, after coming out of the stove, DMD prepreg cloth and foil are solidified into a complete paper tinsel around steel three-dimensional-structure.
This technique cancels use side insulation, after coil winds, carry out forming and hardening makes DMD prepreg cloth and foil be solidified into one, such coil not only possesses extremely strong mechanical strength and anti-short circuit capability, decrease the hidden danger of layer insulation breakage, and save end insulation manufacturing process, make this low voltage foil winding coil manufacturing process simple and practical, coil reliability greatly improves.
The above is the preferred embodiment of the present invention; certainly the interest field of the present invention can not be limited with this; should be understood that; for those skilled in the art; technical scheme of the present invention is modified or equivalent replacement, do not depart from the protection range of technical solution of the present invention.
Claims (4)
1. the low voltage foil winding coil manufacturing process that for no reason insulate of oil-filled transformer, comprises the following steps:
A, the Copper Foil cutting out appropriate length and width as required or aluminium foil foil coiled strip and layer insulation DMD prepreg cloth coiled strip;
B, on foil winding equipment, according to coiling, arrangement Copper Foil or aluminium foil foil coiled strip and layer insulation DMD prepreg cloth are installed in proper order;
C, on Copper Foil or aluminium foil welding draw row, simultaneously to weld carry out polishing clear up;
D, Copper Foil or aluminium foil and layer insulation DMD prepreg cloth coiled strip be coiling simultaneously on foil winding equipment;
E, the coil that coiling is good is loaded onto fixture, put into baker according to technological requirement and carry out forming and hardening.
2. the low voltage foil winding coil manufacturing process that for no reason insulate of oil-filled transformer according to claim 1, it is characterized in that: the DMD prepreg cloth described in steps A, its thickness is 0.25mm, and its width is less than coil height 2mm.
3. the low voltage foil winding coil manufacturing process that for no reason insulate of oil-filled transformer according to claim 1, it is characterized in that: the DMD prepreg cloth described in steps A, its width exceeds the every limit 10 ~ 20mm of coil foil.
4. the low voltage foil winding coil manufacturing process that for no reason insulate of oil-filled transformer according to claim 1, it is characterized in that: after fixture loaded onto by the coil described in step e, put into baker and be progressively warming up to 155 DEG C, and keep this temperature to continue baking 5 ~ 8 hours, until its solidification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410322972.2A CN104269266A (en) | 2014-07-09 | 2014-07-09 | Oil-immersed type transformer non-end-insulation low-voltage foil-winding coil manufacturing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410322972.2A CN104269266A (en) | 2014-07-09 | 2014-07-09 | Oil-immersed type transformer non-end-insulation low-voltage foil-winding coil manufacturing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104269266A true CN104269266A (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410322972.2A Pending CN104269266A (en) | 2014-07-09 | 2014-07-09 | Oil-immersed type transformer non-end-insulation low-voltage foil-winding coil manufacturing technology |
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| CN (1) | CN104269266A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590734A (en) * | 2016-02-27 | 2016-05-18 | 广东广特电气股份有限公司 | Axial double-split dry-type transformer coil structure with same connection groups and winding method |
| CN108962587A (en) * | 2018-07-19 | 2018-12-07 | 德阳新源电器有限责任公司 | High current band winding technologe |
| CN111312498A (en) * | 2020-03-10 | 2020-06-19 | 西比里电机技术(苏州)有限公司 | Alumina insulation winding, preparation method and winding equipment thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002025844A (en) * | 2000-07-03 | 2002-01-25 | Matsushita Electric Ind Co Ltd | Laminated coil |
| CN1794380A (en) * | 2005-12-30 | 2006-06-28 | 中国科学院电工研究所 | Foil type coil of power transformer and its manufacturing method |
| CN101499372A (en) * | 2008-10-28 | 2009-08-05 | 青州市福利电力变压器厂 | Low-voltage winding of oil immersion type power transformer |
| CN201927465U (en) * | 2010-12-21 | 2011-08-10 | 惠州市变压器厂 | Multi-tap dry-type isolation transformer |
| CN202422952U (en) * | 2012-01-19 | 2012-09-05 | 杭州银湖电气设备有限公司 | Foil wound dry-type iron core reactor |
| CN203607241U (en) * | 2013-09-26 | 2014-05-21 | 海南金盘电气有限公司 | Dry type transformer low-voltage foil coil production line |
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2014
- 2014-07-09 CN CN201410322972.2A patent/CN104269266A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002025844A (en) * | 2000-07-03 | 2002-01-25 | Matsushita Electric Ind Co Ltd | Laminated coil |
| CN1794380A (en) * | 2005-12-30 | 2006-06-28 | 中国科学院电工研究所 | Foil type coil of power transformer and its manufacturing method |
| CN101499372A (en) * | 2008-10-28 | 2009-08-05 | 青州市福利电力变压器厂 | Low-voltage winding of oil immersion type power transformer |
| CN201927465U (en) * | 2010-12-21 | 2011-08-10 | 惠州市变压器厂 | Multi-tap dry-type isolation transformer |
| CN202422952U (en) * | 2012-01-19 | 2012-09-05 | 杭州银湖电气设备有限公司 | Foil wound dry-type iron core reactor |
| CN203607241U (en) * | 2013-09-26 | 2014-05-21 | 海南金盘电气有限公司 | Dry type transformer low-voltage foil coil production line |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590734A (en) * | 2016-02-27 | 2016-05-18 | 广东广特电气股份有限公司 | Axial double-split dry-type transformer coil structure with same connection groups and winding method |
| CN108962587A (en) * | 2018-07-19 | 2018-12-07 | 德阳新源电器有限责任公司 | High current band winding technologe |
| CN111312498A (en) * | 2020-03-10 | 2020-06-19 | 西比里电机技术(苏州)有限公司 | Alumina insulation winding, preparation method and winding equipment thereof |
| CN111312498B (en) * | 2020-03-10 | 2022-09-16 | 西比里电机技术(苏州)有限公司 | Alumina insulation winding, preparation method and winding equipment thereof |
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Application publication date: 20150107 |