CN103714967A - Overall pouring method of epoxy resin insulating transformer coil - Google Patents
Overall pouring method of epoxy resin insulating transformer coil Download PDFInfo
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- CN103714967A CN103714967A CN201310742543.6A CN201310742543A CN103714967A CN 103714967 A CN103714967 A CN 103714967A CN 201310742543 A CN201310742543 A CN 201310742543A CN 103714967 A CN103714967 A CN 103714967A
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Abstract
Provided is an overall pouring method of an epoxy resin insulating transformer coil. The transformer coil comprises an inner coil and an outer coil both of which are arranged concentrically, wherein a connected epoxy insulating layer is arranged at least between the inner coil and the outer coil and is in a lotus root shape. The overall pouring method of the epoxy resin insulating transformer coil is characterized in that formation of the epoxy insulating layer in the lotus root shape comprises the steps that a few polytef strips are arranged at intervals on the outer side of the inner coil which is wound well; then the outer coil winds the polytef strips and is shaped to obtain a formed exposed coil set; epoxy rein is poured on the whole exposed coil set with the polytef strips embedded, the polytef strips are drawn out after the epoxy resin is solidified, and the overall qualitative transformation coil is obtained. Due to the characteristics and the advantages, the method can be applied to the overall pouring process of the epoxy resin insulating transformer coil, and then the transformer coil of the lotus root structure can be obtained.
Description
Technical field
The present invention relates to epoxy resins insulation transformer coil integral pouring procedure, described transformer coil comprises inside and outside two groups of coils of concentric setting, has the epoxy insulation layer of connection between at least described two groups of coils, and described epoxy insulation layer is lotus root shape.
Background technology
At present, all manufacture epoxy resin-insulated dry type transformers (hereinafter to be referred as " epoxy is dry to be become ") coil, by " high-tension coil ", " low-voltage coil " manufactured separately, " insulating cylinder " (selecting) etc., a few part parts concentric locking collars are contained on core limb, this conventional method in decades, no matter at home or external, all like this, formed the tactic pattern of a kind of " invariability ", almost without any breakthrough.
In relating to the patent documentation of epoxy resin-insulated dry type transformer, disclosed epoxy insulation layer and be the all-in-one-piece epoxy transformer of lotus root shape, but in these documents, all there is no to disclose how to form the structure that described epoxy insulation layer is lotus root shape.According to the knowledge of the applicant, the epoxy resin-insulated dry type transformer of this structure is generally used in miniature transformer product, and adopts iron staff as the mould that forms lotus root shape structure.For this reason how can be at the epoxy resin integral insulating barrier of large-scale dry-type transformer product formation lotus root shape structure, so far nobody creates, and does not find at least so far to find to have in large-scale dry-type transformer product the dry-type transformer product of lotus root shape structural insulation layer.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of process that forms lotus root shape structural insulation layer, can directly apply to and manufacture large-scale dry-type transformer product.
The present invention proposes a kind of epoxy resins insulation transformer coil integral pouring procedure for this reason, and described transformer coil comprises inside and outside two groups of coils of concentric setting, has the epoxy insulation layer of connection between at least described two groups of coils, and described epoxy insulation layer is lotus root shape; It is characterized in that, the step that forms the described epoxy insulation layer of lotus root shape is: the outside at interior group of complete coil of coiling is spaced several polytetrafluoroethylene bars, the outer coil of organizing described in group coil shaping outside described in the coiling of the outside of polytetrafluoroethylene bar again, obtains the naked coil groups of moulding; By being embedded with the integrated poured epoxy of naked coil groups of polytetrafluoroethylene bar, after epoxy solidifies, extract polytetrafluoroethylene bar out subsequently, obtain qualitatively transformer coil described in integral type.
Wherein, described inside and outside two groups of coils can be both high and low pressure coils, can be also two groups of coils of same electric pressure;
Wherein, between at least described two groups of coils, there is the epoxy insulation layer of connection, refer at least described epoxy insulation layer and connect location between described inside and outside two groups of coils and by described inside and outside two groups of coils.If be also provided with the location skeleton of coil, special-purpose heat dissipation channel etc. between described inside and outside two groups of coils, described epoxy insulation layer gets up described inside and outside two groups of coils, location skeleton, special-purpose whole location that connect such as heat dissipation channel.
Wherein, described epoxy insulation layer is lotus root shape, refers to from cross section, has and incoherent a plurality of centre bores in described epoxy insulation layer, these centre bores not only can dispel the heat and can save resin material, and allow described resin insulating barrier easily process when pouring moulding.Interval dowel between these centre bores not only forms the wall body of these centre bores but also forms the connector between described inside and outside two groups of coils.
Wherein, described polytetrafluoroethylene bar is the object that is strip, has certain flexibility, and has reasonable resistance to elevated temperatures, the most important thing is that it and epoxy resin have rejection, solidifies Shi Buhui be bonded on described polytetrafluoroethylene bar at epoxy resin.Solidify like this after end, can directly described polytetrafluoroethylene bar be extracted out from the epoxy resin of pouring; Even if there is local bending but because described polytetrafluoroethylene bar has certain soft right property, also can extract very expediently described polytetrafluoroethylene bar out in described polytetrafluoroethylene bar secondly in epoxy resin for this reason.
According to above-mentioned technical scheme, can find that its useful effect is, because described polytetrafluoroethylene bar is arranged between described inside and outside two groups of coils, at encapsulating resin layer, solidify and extract out after described polytetrafluoroethylene bar for this reason, can form the described epoxy insulation layer that is lotus root shape, can make to there is discontinuous centre bore in described epoxy insulation layer.Next adopts described polytetrafluoroethylene bar, is convenient to extract out.
Further technical scheme can also be, the interior group of bobbin that coiling is complete is located on rotating pivoted frame, two ends at described pivoted frame arrange supporting disk, described in each, on supporting disk, be provided with several spaced location notchs, more several polytetrafluoroethylene bars be erected at respectively between the described supporting disk at two ends and polytetrafluoroethylene bar correspondence is positioned in described several location notch; In the coiling of the outside of polytetrafluoroethylene bar, organize coil outward and coil is organized in shaping outward again.Like this, just can locate described polytetrafluoroethylene bar by means of the location notch on described supporting disk, wherein can determine expediently every spacing between polytetrafluoroethylene bar especially.
Further technical scheme can also be, when polytetrafluoroethylene bar is set, first in the outer felt of polytetrafluoroethylene bar around to few layer of glass grid cloth, then organize coil outward in the coiling of the outside of fiberglass gridding cloth.Can utilize so the further described polytetrafluoroethylene bar in location of described fiberglass gridding cloth, and described fiberglass gridding cloth can be dissolved in epoxy resin, and can allow described outer group of coil finally from the certain distance of described centre bore.
Further technical scheme can also be, the polytetrafluoroethylene bar of levels is set, wherein after placing the polytetrafluoroethylene bar of internal layer again in its outer felt around compound glass fibrous mesh cloth, the thickness of winding compound glass fibrous mesh cloth is according to design parameter determination; Again, in the outside of compound glass fibrous mesh cloth, place outer field polytetrafluoroethylene bar, then after in the outside of outer field polytetrafluoroethylene bar again coiling organize coil outward.Can utilize like this fiberglass gridding cloth described in multilayer to form the supporter between the polytetrafluoroethylene bar of levels, when coiling is organized coil outward, allow the polytetrafluoroethylene bar on upper strata be unlikely to undue distortion; And the described fiberglass gridding cloth of multilayer can be dissolved in epoxy resin, in other words when encapsulated epoxy resin, epoxy resin can permeate in the described fiberglass gridding cloth that flows into multilayer completely, has so also greatly strengthened the structural strength of epoxy resin layer simultaneously.
Further technical scheme can also be, after placing outer field polytetrafluoroethylene bar, then is wound around at least layer of glass grid cloth in the outside of outer field polytetrafluoroethylene bar again, then after in the coiling of the outside of fiberglass gridding cloth, organize coil outward
Because the present invention has These characteristics and advantage, thereby can be applied in the integrated poured technique of epoxy resins insulation transformer coil for this reason, obtain this product with lotus root shape structure.
Accompanying drawing explanation
Fig. 1 is the structural representation of integral type transformer coil;
Fig. 2 is the structural representation of supporting disk;
Fig. 3 is the pivoted frame structural representation that described supporting disk is installed, and is also the cutaway view of A direction in Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, to applying the integrated poured technique of epoxy resins insulation transformer coil of the present invention, be further described.
As shown in Figure 1, transformer coil comprises interior group of coil 13 of concentric setting, outer group of coil 14, described interior group of coil 13 itself has air flue hole, and described inside and outside two groups of coils (13,14) can be both high and low pressure coils, can be also two groups of coils of same electric pressure.The middle position of described interior group of coil 13 is medium pores 10.
At least between described two groups of coils (13,14), there is the epoxy insulation layer 16 of connection, from cross section, in described epoxy insulation layer 16, have and incoherent a plurality of centre bores (11,12), these centre bores (11,12) not only can dispel the heat and can save resin material, and allow described resin insulating barrier easily process when pouring moulding.Interval dowel 15 between these centre bores (11,12) not only forms the wall body of these centre bores (11,12) but also forms the connector between described inside and outside two groups of coils (13,14).
Also comprise two supporting disks 2, as shown in Figures 2 and 3, thereby described supporting disk 2 is erected at formation pivoted frame on central rotating shaft 4; Described in each, on supporting disk 2, be provided with 6 spaced location notchs 21, described location notch 21 is for setting up polytetrafluoroethylene bar 3.
Utilize above-mentioned pivoted frame and polytetrafluoroethylene bar 3, realize epoxy resins insulation transformer coil integral pouring procedure and be:
1. first described interior group of complete coil 13 of coiling is set on described central rotating shaft 4, and at two ends, clamps described interior group of coil 13 with two described supporting disks 2.
2. if wish to form many epoxy resin layers in the outside of described interior group of coil 13, can also be at described interior group of coil 13 one or more layers fiberglass gridding cloths of outer surface reinforcement; Otherwise can be without reinforcement.
3. described in each, in location notch 21, lay a polytetrafluoroethylene bar 3, in six described location notchs 21, set up 6 described polytetrafluoroethylene bars 3, described like this location notch 21 is located at 6 described polytetrafluoroethylene bar 3 uniform spreadings outside the location of described interior group of coil 13, certainly lays the quantity of described polytetrafluoroethylene bar 3 and can adjust as required; The combination of described supporting disk 2 and described polytetrafluoroethylene bar 3, outer image mouse cage; When laying described polytetrafluoroethylene bar 3, with fiberglass gridding cloth, be coated described polytetrafluoroethylene bar 3 simultaneously, so just can locate described polytetrafluoroethylene bar 3 simultaneously, also can guarantee that described polytetrafluoroethylene bar 3 can not fall out from described supporting disk 2.
If 4. need to arrange again in the outside of polytetrafluoroethylene bar 3 described in ground floor polytetrafluoroethylene bar 3 described in the second layer form the described polytetrafluoroethylene bar 3 that is arranged above and below and and then wish to obtain double-deck described centre bore (11,12), can in the outside of polytetrafluoroethylene bar 3 described in ground floor, lay the fiberglass gridding cloth of multilayer, the thickness of the fiberglass gridding cloth of multilayer can be according to design parameter determination; Or wish the thickness of the epoxy resin layer 16 between the described inside and outside two groups of coils of thickening (13,14), can lay the fiberglass gridding cloth of multilayer in inner side or the outside of polytetrafluoroethylene bar 3 described in ground floor, the thickness of the fiberglass gridding cloth of multilayer can be according to design parameter determination.When being product design, described design parameter requires definite numerical value according to various electrical quantitys such as the electric pressure of product, dielectric strengths.
5. seal at least after one deck fiberglass gridding cloth laying described polytetrafluoroethylene bar 3 and wrap up in, outer group coil 14 described in its outside starts coiling, more afterwards described outer group of coil 14 given to shaping and locate, obtain the naked coil groups of moulding.
6. two the described supporting disks 2 of decorporating afterwards again, and the naked coil groups of described moulding is inserted in the particular manufacturing craft of encapsulated epoxy resin and encapsulated epoxy resin.
7. after epoxy resin solidifies, taking out described polytetrafluoroethylene bar 3, to obtain finished product be integral type epoxy resins insulation transformer coil.
When encapsulated epoxy resin, epoxy resin can automatically be immersed in the gap of fiberglass gridding cloth and fiberglass gridding cloth is held in epoxy resin layer.According to such scheme, extract after described polytetrafluoroethylene bar 3, on epoxy resins insulation transformer coil, form the centre bore (11,12) of lotus root shape, and it is very easy to extract described polytetrafluoroethylene bar 3, the described polytetrafluoroethylene bar 3 of extracting, two described supporting disks 2 of decorporating etc. can be reused, and can not cause too many waste.
Claims (5)
1. epoxy resins insulation transformer coil integral pouring procedure, described transformer coil comprises inside and outside two groups of coils of concentric setting, has the epoxy insulation layer of connection between at least described two groups of coils, described epoxy insulation layer is lotus root shape; It is characterized in that, the step that forms the described epoxy insulation layer of lotus root shape is: the outside at interior group of complete coil of coiling is spaced several polytetrafluoroethylene bars, the outer coil of organizing described in group coil shaping outside described in the coiling of the outside of polytetrafluoroethylene bar again, obtains the naked coil groups of moulding; By being embedded with the integrated poured epoxy of naked coil groups of polytetrafluoroethylene bar, after epoxy solidifies, extract polytetrafluoroethylene bar out subsequently, obtain qualitatively transformer coil described in integral type.
2. epoxy resins insulation transformer coil integral pouring procedure according to claim 1, it is characterized in that, the interior group of bobbin that coiling is complete is located on rotating pivoted frame, two ends at described pivoted frame arrange supporting disk, described in each, on supporting disk, be provided with several spaced location notchs, more several polytetrafluoroethylene bars be erected at respectively between the described supporting disk at two ends and polytetrafluoroethylene bar correspondence is positioned in described several location notch; In the coiling of the outside of polytetrafluoroethylene bar, organize coil outward and coil is organized in shaping outward again.
3. epoxy resins insulation transformer coil integral pouring procedure according to claim 1 and 2, it is characterized in that, when polytetrafluoroethylene bar is set, in the outer felt of polytetrafluoroethylene bar, around to few layer of glass grid cloth, then organize coil outward in the coiling of the outside of fiberglass gridding cloth.
4. epoxy resins insulation transformer coil integral pouring procedure according to claim 3, it is characterized in that, the polytetrafluoroethylene bar of levels is set, wherein after placing the polytetrafluoroethylene bar of internal layer again in its outer felt around compound glass fibrous mesh cloth, the thickness of winding compound glass fibrous mesh cloth is according to design parameter determination; Again, in the outside of compound glass fibrous mesh cloth, place outer field polytetrafluoroethylene bar, then after in the outside of outer field polytetrafluoroethylene bar again coiling organize coil outward.
5. epoxy resins insulation transformer coil integral pouring procedure according to claim 4, it is characterized in that, after placing outer field polytetrafluoroethylene bar, in the outside of outer field polytetrafluoroethylene bar, be wound around again at least layer of glass grid cloth again, then after in the coiling of the outside of fiberglass gridding cloth, organize coil outward.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310742543.6A CN103714967B (en) | 2013-12-30 | 2013-12-30 | Epoxy resins insulation transformer coil integral pouring procedure |
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| CN201310742543.6A CN103714967B (en) | 2013-12-30 | 2013-12-30 | Epoxy resins insulation transformer coil integral pouring procedure |
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| CN103714967A true CN103714967A (en) | 2014-04-09 |
| CN103714967B CN103714967B (en) | 2016-03-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108492979A (en) * | 2018-05-11 | 2018-09-04 | 上海南桥变压器有限责任公司 | Insulating cylinder pouring procedure between 10kV grounding transformer high-voltage windings |
| CN110473698A (en) * | 2019-08-02 | 2019-11-19 | 全球能源互联网研究院有限公司 | A kind of insulating sleeve and preparation method thereof of DC isolation transformer |
| CN117885263A (en) * | 2024-03-14 | 2024-04-16 | 煤炭科学研究总院有限公司 | Special-shaped striking rod posture correcting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58200519A (en) * | 1982-05-18 | 1983-11-22 | Alps Electric Co Ltd | Preparation of coil |
| CN201323132Y (en) * | 2008-11-14 | 2009-10-07 | 天津市特变电工变压器有限公司 | Thin-plate die for high-capacity epoxy resin poured dry-type transformer |
| CN201498332U (en) * | 2009-09-09 | 2010-06-02 | 泰安隆昌广变压器有限公司 | Dry transformer coil structure |
| CN202454437U (en) * | 2012-02-17 | 2012-09-26 | 上海一电变压器有限公司 | Dry type transformer for pouring high-voltage coil and low-voltage coil together |
-
2013
- 2013-12-30 CN CN201310742543.6A patent/CN103714967B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58200519A (en) * | 1982-05-18 | 1983-11-22 | Alps Electric Co Ltd | Preparation of coil |
| CN201323132Y (en) * | 2008-11-14 | 2009-10-07 | 天津市特变电工变压器有限公司 | Thin-plate die for high-capacity epoxy resin poured dry-type transformer |
| CN201498332U (en) * | 2009-09-09 | 2010-06-02 | 泰安隆昌广变压器有限公司 | Dry transformer coil structure |
| CN202454437U (en) * | 2012-02-17 | 2012-09-26 | 上海一电变压器有限公司 | Dry type transformer for pouring high-voltage coil and low-voltage coil together |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108492979A (en) * | 2018-05-11 | 2018-09-04 | 上海南桥变压器有限责任公司 | Insulating cylinder pouring procedure between 10kV grounding transformer high-voltage windings |
| CN108492979B (en) * | 2018-05-11 | 2021-04-02 | 上海南桥变压器有限责任公司 | Pouring method for insulating cylinder between high-voltage windings of 10kV grounding transformer |
| CN110473698A (en) * | 2019-08-02 | 2019-11-19 | 全球能源互联网研究院有限公司 | A kind of insulating sleeve and preparation method thereof of DC isolation transformer |
| CN117885263A (en) * | 2024-03-14 | 2024-04-16 | 煤炭科学研究总院有限公司 | Special-shaped striking rod posture correcting device |
| CN117885263B (en) * | 2024-03-14 | 2024-06-11 | 煤炭科学研究总院有限公司 | Special-shaped striking rod forming device |
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| CN103714967B (en) | 2016-03-16 |
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Application publication date: 20140409 Assignee: FOSHAN YIGEER ELECTRONICS Co.,Ltd. Assignor: EAGLERISE ELECTRIC & ELECTRONIC (CHINA) Co.,Ltd. Contract record no.: X2020440000082 Denomination of invention: Overall pouring method of epoxy resin insulating transformer coil Granted publication date: 20160316 License type: Common License Record date: 20200601 |
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Application publication date: 20140409 Assignee: FOSHAN SHUNDE EAGLERISE ELECTRIC POWER TECHNOLOGY Co.,Ltd. Assignor: EAGLERISE ELECTRIC & ELECTRONIC (CHINA) Co.,Ltd. Contract record no.: X2021440000189 Denomination of invention: Integral pouring method of epoxy resin insulated transformer coil Granted publication date: 20160316 License type: Common License Record date: 20211011 |
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Effective date of registration: 20211227 Address after: 528000 No. 4, Huanzhen East Road, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee after: FOSHAN SHUNDE EAGLERISE ELECTRIC POWER TECHNOLOGY Co.,Ltd. Patentee after: JI'AN IGOR ELECTRIC Co.,Ltd. Patentee after: Ji'an Igor magnetoelectric Technology Co.,Ltd. Patentee after: EAGLERISE ELECTRIC & ELECTRONIC (CHINA) Co.,Ltd. Address before: 528200, A3, Guicheng science and Technology Park, Jian Ping Road, Nanhai District, Guangdong, Foshan Patentee before: EAGLERISE ELECTRIC & ELECTRONIC (CHINA) Co.,Ltd. |
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