CN104217851A - End sealing method for low-voltage foil type coil of dry type transformer - Google Patents
End sealing method for low-voltage foil type coil of dry type transformer Download PDFInfo
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- CN104217851A CN104217851A CN201410445440.8A CN201410445440A CN104217851A CN 104217851 A CN104217851 A CN 104217851A CN 201410445440 A CN201410445440 A CN 201410445440A CN 104217851 A CN104217851 A CN 104217851A
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Abstract
The invention discloses an end sealing method for a low-voltage foil type coil of a dry type transformer. The end sealing method comprises the following specific steps of (1) forming a pouring groove (5) when a low-voltage coil (1) is wound; (2) solidifying and demolding; (3) painting glass cement or filling alkali-free glass tape; (4) preheating; (5) preparing high-temperature-resisting normal temperature resin; (6) carrying out degasification processing; (7) fully solidifying the high-temperature-resisting normal temperature resin; (8) polishing the low-voltage coil to be in a drawing size; (9) painting mixture of putty and a curing agent in the position of a bubble generated by resin reaction, and smoothing the bubble; (10) cleaning the low-voltage coil (1). According to the end sealing method disclosed by the invention, an uneven surface, a hole and a gap of the low-voltage coil are successfully removed, the upper end surface of the produced low-voltage coil is bright in color and clear in corner angle, the end sealing is not subjected to warping and cracking at 155 DEG C, and the appearance quality and the electrical performance of the low-voltage coil are greatly increased.
Description
Technical field
The present invention relates to transformer technology field, is specifically a kind of dry-type transformer low voltage foil type coil end encapsulation method.
Background technology
The manufacture of dry-type transformer low voltage foil type coil is divided into coiling, shaping solidification and an end inside back cover operation.When doing coil upper end face end envelope, first normal temperature Resin A material and B material being allocated in proportion, being then cast in the groove of coil upper end face, and normal temperature resin unnecessary for air flue place is cleaned out.Finally, treat that normal temperature resin solidifies completely, polish flat with sanding machine, and crimson colored paint.If transformer when in running, temperature rise is more than 130 DEG C normal temperature resin can there is the phenomenon such as aliquation, cracking, (whether can underline the key temperatures of 130 DEG C here, again below labor) cause low-voltage coil upper surface uneven, there is hole and gap.This has had a strong impact on performance and the presentation quality of transformer, shortens the useful life of transformer.
Summary of the invention
The technical problem to be solved in the present invention is, there is provided a kind of and eliminate uneven of low-voltage coil, hole and gap smoothly, the low-voltage coil upper surface bright in color produced, corner angle are clear, and when 155 DEG C, end seals not aliquation, cracking, substantially increases the presentation quality of low-voltage coil and the dry-type transformer low voltage foil type coil end encapsulation method of electric property
Technical scheme of the present invention is, provides a kind of dry-type transformer low voltage foil type coil end encapsulation method with following structure, comprises following concrete steps:
(1), low-voltage coil is when coiling, the epoxy plate that thickness is 0.5mm is all placed in the innermost layer of low-voltage coil, outermost layer and stay both sides, the critical baffle plate by being located at low-voltage coil one end in one end of epoxy plate, just forms cast groove between the upper surface of adjacent epoxy plate, low-voltage coil, the inner face of baffle plate;
(2), by low-voltage coil solidify in an oven, below the temperature Temperature fall to 40 DEG C treating low-voltage coil after going out baking oven, low-tension coil demoulding;
(3), glass cement or filling alkali-free glass silk ribbon is coated with at the gap place often locating to pour into a mould groove;
(4), by high temperature resistant normal temperature Resin A material put into baking oven preheating 25 ~ 35min, oven temperature is set to 40 ~ 60 DEG C;
(5), by weight A material: B material=4:1 allocates high temperature resistant normal temperature resin, blender is used to stir 3 ~ 5 minutes;
(6) the high temperature resistant normal temperature resin, after allotment leaves standstill and carries out degassed process in 15 ~ 20 minutes;
(7), high temperature resistant normal temperature resin is cast on request the cast groove of low-voltage coil in 40 minutes;
(8), at 0 ~ 15 DEG C leave standstill more than 16 hours, then leave standstill more than 8 hours at 15 ~ 25 DEG C, then leave standstill more than 6 hours at 25 ~ 35 DEG C, treat that high temperature resistant normal temperature resin solidifies completely, coil is polished to figure paper size;
(9), by weight atomized ash: curing agent=(35 ~ 40): 1 mixing, re-uses the bubble place that perching knife uniform application is producing because of resin reaction, and bubble is floating;
(10), compressed air cleaning low-voltage coil is used, and by the crimson colored paint of technological requirement.
After adopting said method, the present invention compared with prior art, have the following advantages: according to new technology, eliminate uneven of low-voltage coil, hole and gap smoothly, the low-voltage coil upper surface bright in color produced, corner angle are clear, and when 155 DEG C, high temperature resistant normal temperature resin can ensure that end seals not aliquation, cracking, substantially increases presentation quality and the electric property of low-voltage coil.
Accompanying drawing explanation
Accompanying drawing 1 is the main TV structure schematic diagram of dry-type transformer low voltage foil type coil of the present invention.
Accompanying drawing 2 is end construction schematic diagrames of dry-type transformer low voltage foil type coil of the present invention.
Shown in figure, 1, low-voltage coil, 1.1, upper surface, 2, baffle plate, 3, epoxy plate, 4, stay, 5, cast groove.
Embodiment
Below in conjunction with accompanying drawing, dry-type transformer low voltage foil type coil end encapsulation method of the present invention is described further.
Embodiment one: as shown in Figure 1 and Figure 2, dry-type transformer low voltage foil type coil end encapsulation method of the present invention, comprises following concrete steps:
(1), low-voltage coil 1 is when coiling, the end insulation of being made up of epoxy prepreg is not put in upper surface 1.1, innermost layer, outermost layer and stay 4 both sides all place the epoxy plate 3 that thickness is 0.5mm, epoxy plate 3 is critical by baffle plate 2, just forms cast groove 5 between adjacent epoxy plate 3; The end insulation that this epoxy prepreg is made is market purchasing product;
(2), by technological requirement low-voltage coil 1 is solidified in an oven, treat after going out baking oven that low-voltage coil 1 temperature drops to less than 40 DEG C, low-voltage coil 1 demoulding;
(3), glass cement is coated with at the gap place often locating to pour into a mould groove 5; This glass cement is market purchasing product;
(4), by high temperature resistant normal temperature Resin A material put into baking oven preheating 30min, oven temperature is set to 45 DEG C;
(5), by weight A material: B material=4:1 allocates high temperature resistant normal temperature resin, blender is used to stir 3 minutes; This high temperature resistant normal temperature resin is market purchasing product; Buying producer is: Jiangxi Hong Te insulating material Co., Ltd, model is: 8028B.
(6) the high temperature resistant normal temperature resin, after allotment leaves standstill and carries out degassed process in 16 minutes;
(7), high temperature resistant normal temperature resin is cast on request cast groove 5 place of low-voltage coil 1 in 40 minutes;
(8), at 0 ~ 15 DEG C leave standstill more than 16 hours, then leave standstill more than 8 hours at 15 ~ 25 DEG C, then leave standstill more than 6 hours at 25 ~ 35 DEG C, treat that high temperature resistant normal temperature resin solidifies completely, coil is polished to figure paper size;
(9), by weight atomized ash: curing agent=36:1 mixing, re-uses the bubble place that perching knife uniform application is producing because of resin reaction, and bubble is floating; This atomized ash and curing agent are market purchasing product;
(10), compressed air cleaning low-voltage coil 1 is used, and by the crimson colored paint of technological requirement.
Embodiment two: as shown in Figure 1 and Figure 2, dry-type transformer low voltage foil type coil end encapsulation method of the present invention, comprises following concrete steps:
(1), low-voltage coil 1 is when coiling, the end insulation of being made up of epoxy prepreg is not put in upper surface 1.1, innermost layer, outermost layer and stay 4 both sides all place the epoxy plate 3 that thickness is 0.5mm, epoxy plate 3 is critical by baffle plate 2, just forms cast groove 5 between adjacent epoxy plate 3; The end insulation that this epoxy prepreg is made is market purchasing product;
(2), by technological requirement low-voltage coil 1 is solidified in an oven, treat after going out baking oven that low-voltage coil 1 temperature drops to less than 40 DEG C, low-voltage coil 1 demoulding;
(3), the gap place filling alkali-free glass silk ribbon pouring into a mould groove 5 is often being located; This alkali-free glass silk ribbon is market purchasing product;
(4), by high temperature resistant normal temperature Resin A material put into baking oven preheating 30min, oven temperature is set to 55 DEG C;
(5), by weight A material: B material=4:1 allocates high temperature resistant normal temperature resin, blender is used to stir 4 minutes; This high temperature resistant normal temperature resin is market purchasing product; Buying producer is: Jiangxi Hong Te insulating material Co., Ltd, model is: 8028B.
(6) the high temperature resistant normal temperature resin, after allotment leaves standstill and carries out degassed process in 19 minutes;
(7), high temperature resistant normal temperature resin is cast on request cast groove 5 place of low-voltage coil 1 in 40 minutes;
(8), at 0 ~ 15 DEG C leave standstill more than 16 hours, then leave standstill more than 8 hours at 15 ~ 25 DEG C, then leave standstill more than 6 hours at 25 ~ 35 DEG C, treat that high temperature resistant normal temperature resin solidifies completely, coil is polished to figure paper size;
(9), by weight atomized ash: curing agent=38:1 mixing, re-uses the bubble place that perching knife uniform application is producing because of resin reaction, and bubble is floating; This atomized ash and curing agent are market purchasing product;
(10), compressed air cleaning low-voltage coil 1 is used, and by the crimson colored paint of technological requirement.
Claims (1)
1. a dry-type transformer low voltage foil type coil end encapsulation method: comprise following concrete steps:
(1), low-voltage coil (1) is when coiling, the epoxy plate (3) that thickness is 0.5mm is all placed in innermost layer in low-voltage coil (1), outermost layer and stay (4) both sides, the critical baffle plate (2) by being located at low-voltage coil (1) one end in one end of epoxy plate (3), just forms cast groove (5) between the upper surface (1.1) of adjacent epoxy plate (3), low-voltage coil (1), the inner face of baffle plate (2);
(2), by low-voltage coil (1) solidify in an oven, below the temperature Temperature fall to 40 DEG C treating low-voltage coil (1) after going out baking oven, low-voltage coil (1) demoulding;
(3), glass cement or filling alkali-free glass silk ribbon is coated with at the gap place often locating to pour into a mould groove (5);
(4), by high temperature resistant normal temperature Resin A material put into baking oven preheating 25 ~ 35min, oven temperature is set to 40 ~ 60 DEG C;
(5), by weight A material: B material=4:1 allocates high temperature resistant normal temperature resin, blender is used to stir 3 ~ 5 minutes;
(6) the high temperature resistant normal temperature resin, after allotment leaves standstill and carries out degassed process in 15 ~ 20 minutes;
(7), high temperature resistant normal temperature resin is cast on request cast groove (5) place of low-voltage coil (1) in 40 minutes;
(8), at 0 ~ 15 DEG C leave standstill more than 16 hours, then leave standstill more than 8 hours at 15 ~ 25 DEG C, then leave standstill more than 6 hours at 25 ~ 35 DEG C, treat that high temperature resistant normal temperature resin solidifies completely, coil is polished to figure paper size;
(9), by weight atomized ash: curing agent=(35 ~ 40): 1 mixing, re-uses the bubble place that perching knife uniform application is producing because of resin reaction, and bubble is floating;
(10), compressed air cleaning low-voltage coil (1) is used, and by the crimson colored paint of technological requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410445440.8A CN104217851A (en) | 2014-09-03 | 2014-09-03 | End sealing method for low-voltage foil type coil of dry type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410445440.8A CN104217851A (en) | 2014-09-03 | 2014-09-03 | End sealing method for low-voltage foil type coil of dry type transformer |
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| CN104217851A true CN104217851A (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410445440.8A Pending CN104217851A (en) | 2014-09-03 | 2014-09-03 | End sealing method for low-voltage foil type coil of dry type transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295771A (en) * | 2013-05-17 | 2013-09-11 | 宁波奥克斯高科技有限公司 | Method for manufacturing end seals of low-voltage foil coils of dry type transformers |
| CN107578914A (en) * | 2017-09-22 | 2018-01-12 | 南通龙翔电器设备有限公司 | End seal preparation method under a kind of low-voltage coil of dry type transformer |
| CN108933032A (en) * | 2018-07-24 | 2018-12-04 | 南通龙翔电器设备有限公司 | Low-voltage coil of dry type transformer and its upper and lower end seal production method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1933066A (en) * | 2006-09-08 | 2007-03-21 | 中电电气集团有限公司 | Half-packaging high-voltage coil end sealing technology process |
| CN102723180A (en) * | 2012-06-11 | 2012-10-10 | 常熟市常源变压器有限公司 | Low voltage coil used for dry-type transformer |
| CN102903514A (en) * | 2012-11-05 | 2013-01-30 | 中电电气(江苏)股份有限公司 | End sealing process for multilayer foil coil of dry-type transformer |
| CN103295771A (en) * | 2013-05-17 | 2013-09-11 | 宁波奥克斯高科技有限公司 | Method for manufacturing end seals of low-voltage foil coils of dry type transformers |
| CN103887060A (en) * | 2014-04-14 | 2014-06-25 | 南通龙翔电器设备有限公司 | Manufacturing method for lower end seal of dry type transformer low-voltage coil |
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2014
- 2014-09-03 CN CN201410445440.8A patent/CN104217851A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1933066A (en) * | 2006-09-08 | 2007-03-21 | 中电电气集团有限公司 | Half-packaging high-voltage coil end sealing technology process |
| CN102723180A (en) * | 2012-06-11 | 2012-10-10 | 常熟市常源变压器有限公司 | Low voltage coil used for dry-type transformer |
| CN102903514A (en) * | 2012-11-05 | 2013-01-30 | 中电电气(江苏)股份有限公司 | End sealing process for multilayer foil coil of dry-type transformer |
| CN103295771A (en) * | 2013-05-17 | 2013-09-11 | 宁波奥克斯高科技有限公司 | Method for manufacturing end seals of low-voltage foil coils of dry type transformers |
| CN103887060A (en) * | 2014-04-14 | 2014-06-25 | 南通龙翔电器设备有限公司 | Manufacturing method for lower end seal of dry type transformer low-voltage coil |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295771A (en) * | 2013-05-17 | 2013-09-11 | 宁波奥克斯高科技有限公司 | Method for manufacturing end seals of low-voltage foil coils of dry type transformers |
| CN103295771B (en) * | 2013-05-17 | 2016-01-20 | 宁波奥克斯高科技有限公司 | A kind of dry-type transformer low voltage foil type coil end envelope manufacture method |
| CN107578914A (en) * | 2017-09-22 | 2018-01-12 | 南通龙翔电器设备有限公司 | End seal preparation method under a kind of low-voltage coil of dry type transformer |
| CN108933032A (en) * | 2018-07-24 | 2018-12-04 | 南通龙翔电器设备有限公司 | Low-voltage coil of dry type transformer and its upper and lower end seal production method |
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Application publication date: 20141217 |
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