CN108933032A - Low-voltage coil of dry type transformer and its upper and lower end seal production method - Google Patents
Low-voltage coil of dry type transformer and its upper and lower end seal production method Download PDFInfo
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- CN108933032A CN108933032A CN201810817410.3A CN201810817410A CN108933032A CN 108933032 A CN108933032 A CN 108933032A CN 201810817410 A CN201810817410 A CN 201810817410A CN 108933032 A CN108933032 A CN 108933032A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/122—Insulating between turns or between winding layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Of Coils (AREA)
Abstract
The present invention discloses a kind of low-voltage coil of dry type transformer, including coil, it is set to the preimpregnation DMD insulating materials of coil interlayer, is set to the gas channel supporting bar of coil interlayer, air flue is formed after gas channel supporting bar support coil, the end two sides of the outer layer of coil, the internal layer of coil and air flue are provided with epoxy plate, and coil lead is drawn using copper bar.For low-voltage coil of dry type transformer disclosed by the invention in the internal layer and outer layer of coil, there are also the end two sides of air flue, and epoxy plate is arranged, and not only acts as insulating effect, while air passage structure is stablized, and is conducive to heat dissipation when low-voltage coil of dry type transformer work；Invention additionally discloses end seal production methods above and below a kind of low-voltage coil of dry type transformer, it is heating and curing by presoaking DMD insulating materials, so that low-voltage coil interlayer is tightly formed entirety, mechanical strength, the electrical strength of low-voltage coil are enhanced, moisture-proof, dust tightness is provided simultaneously with.This simple production process, and it is with short production cycle.
Description
Technical field
The invention belongs to transformer terminal encapsulation technique fields, and in particular to a kind of low-voltage coil of dry type transformer and its upper and lower side
Seal production method.
Background technique
Dry-type transformer is moisture-proof, dust-proof, corrosion resistance in order to enhance, and improves the electrical strength of dry-type transformer, increases
Add the service life of dry-type transformer, the upper and lower end face of low-voltage coil of dry type transformer needs to carry out end seal processing.Currently, market
The upper and lower end face of upper low-voltage coil of dry type transformer generallys use resin-cast and carries out end seal.Patents documents, which are also disclosed, adopts
The low-voltage coil of dry type transformer of end seal is carried out with the upper and lower end face of resin casting dry-type transformer low-voltage coil.Such as application No. is
The utility model of CN201020137046.5, entitled " the oval low-voltage coil of resin casting dry-type transformer " of utility model are special
Benefit discloses a kind of oval low-voltage coil of resin casting dry-type transformer, including the insulation of resin end, the insulation preimpregnation of conductor copper foil, layer
DMD, aluminium alloy gas channel supporting bar, low-voltage lead copper bar.Conductor copper foil constitutes oblong low-voltage coil conductor, and conductor copper foil uses nothing
Oxygen copper foil, low-voltage coil structure are oval foil around non-casting lock-in type, and coil-conductor material uses copper foil, and interlayer dielectic is adopted
With preimpregnation DMD, the aluminum alloy square tube that gas channel supporting bar uses thin-walled to breathe freely, coil-conductor is used and the consistent monolith copper of coil height
Foil, coil lead are drawn after argon arc welding with copper bar, and it is exhausted that the both ends of coil by epoxy resin encapsulated solidification constitute resin end
Edge, being breathed freely by thin-walled, square tube props up copper foil, layer insulating materials forms air flue.The end seal processing of this kind of low-voltage coil of dry type transformer
It is exactly upper surface is first carried out by resin-cast using traditional cured technique of resin encapsulating at normal temperature, after cured, then
Lower end surface is handled according to the above method, end face of finally polishing again.Not only technique is cumbersome but also increases work for this treatment process
When, extend the production cycle of product.For this reason, it may be necessary to seek a kind of end seal technique of low-voltage coil of dry type transformer, Ke Yi
Guarantee that low-voltage coil of dry type transformer is moisture-proof, dust-proof, corrosion resistance performance in the case where not being poured.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of low-voltage coil of dry type transformer and its upper and lower end seal to make
Method, solving low-voltage coil of dry type transformer in the prior art, end seal is numerous using technique brought by room temperature resin-cast up and down
Technical problem trivial, the production cycle is long.
In order to solve the above technical problems, the technical solution adopted by the present invention: a kind of low-voltage coil of dry type transformer, including line
It encloses, be set to the preimpregnation DMD insulating materials of coil interlayer, be set to the gas channel supporting bar of coil interlayer, the gas channel supporting bar support
Air flue is formed after coil, it is characterised in that: the end two sides of the outer layer of the coil, the internal layer of coil and air flue are provided with
The lead of epoxy plate, the coil is drawn using copper bar.
In the present invention, the interlayer of coil is using the internal layer and air flue for presoaking DMD insulating materials, the outer layer of coil, coil
Both side ends be all made of epoxy plate as insulating layer.Due to preimpregnation DMD insulating materials have proof voltage is high, dielectric loss is low,
Partial discharge amount is small, high mechanical strength, water imbibition are minimum, resistant to chemical etching etc., therefore presoaks interlayer of the DMD insulating materials as coil
Insulating materials, good insulating effect；Further, since epoxy plate heat-resist, good mechanical performance, therefore, the structure of air flue
Relatively stable, the thermal diffusivity of low-voltage coil of dry type transformer is good.
Preferably, it is described preimpregnation DMD insulating materials with a thickness of 0.1 ~ 0.3 mm.The preimpregnation DMD insulation material of this kind of thickness
Material both can guarantee the insulating properties of coil interlayer, while guarantee that low-voltage coil of dry type transformer upper and lower end face is able to carry out the same of end seal
When do not waste insulating materials.
Gas channel supporting bar forms air flue after being used to support coil, and the material of gas channel supporting bar can be conventional material.The present invention is excellent
Choosing, the gas channel supporting bar is that alkali-free glass fibre dipping thermosetting resin is made by pultrude process production, is supportted as air flue
Item it have many advantages, such as high mechanical strength, excellent electrical properties, fire-retardant, corrosion-resistant, resistance to electric arc.
Preferably, the epoxy plate with a thickness of 0.1 ~ 1 mm.It is further preferred that the epoxy plate with a thickness of 0.2 ~
0.6 mm.The epoxy plate of this kind of thickness both can guarantee the insulating properties of outer room in coil, while epoxy plate is unlikely to deform, and guarantee air flue
The stability of structure.
Preferably, the coil winding is circle, oblong, any one in rectangular or ellipse.
A kind of production method of the upper and lower end seal of low-voltage coil of dry type transformer, which comprises the following steps:
(1) in coil winding, interlayer places preimpregnation DMD insulating materials；
(2) gas channel supporting bar is placed in the interlayer of coil, while is placed in the both side ends for supporting the air flue formed by gas channel supporting bar
Epoxy plate；
(3) in coil winding, the outer layer of coil and the internal layer of coil place epoxy plate；
(4) coil after the completion of coiling is put into furnace, 1 ~ 5h is dried at a temperature of 100 ~ 200 DEG C.
Preferably, the temperature is 130 ~ 140 DEG C in furnace.
Preferably, the placing height of the DMD insulating materials is greater than longitudinal height of coil copper conductor.
Preferably, the height height of the epoxy plate is consistent with the height of DMD insulating materials.
Beneficial effects of the present invention:
The present invention discloses a kind of low-voltage coil of dry type transformer and its upper and lower end seal production method, wherein dry-type transformer low-voltage line
Circle includes coil, is set to the preimpregnation DMD insulating materials of coil interlayer, is set to the gas channel supporting bar of coil interlayer, gas channel supporting bar
Air flue is formed after support coil, the both side ends of the outer layer of coil, the internal layer of coil and air flue are provided with epoxy plate, line
Lead is enclosed to draw using copper bar.Low-voltage coil of dry type transformer disclosed by the invention is in the internal layer and outer layer of coil, and there are also gas
Epoxy plate is arranged in the both side ends in road, not only acts as insulating effect, while air passage structure is stablized, and facilitates dry-type transformer low
It radiates when pressing coil working；
In addition, invention additionally discloses end seal production method above and below a kind of low-voltage coil of dry type transformer, the coiling including coil with
And coil heats solidify after coiling.Different from the conventional technical solution for carrying out low-voltage coil or more end seal using room temperature resin, originally
Invention makes preimpregnation DMD insulating materials be heating and curing by high temperature, so that low-voltage coil interlayer is tightly formed entirety, enhances machine
Tool intensity, electrical strength are provided simultaneously with moisture-proof, dust tightness.In addition, epoxy is arranged inside and outside air flue two sides and coil
Plate, since epoxy plate insulation and heat resistance, high-temperature operation do not influence the structure of epoxy plate.Therefore, air passage structure will not be because of height
Temperature and collapse, will not influence the thermal diffusivity of low-voltage coil of dry type transformer.This simple production process, and it is with short production cycle.
Detailed description of the invention
Fig. 1 is a kind of main view of low-voltage coil of dry type transformer；
Fig. 2 is a kind of top view of low-voltage coil of dry type transformer；
Appended drawing reference in figure, 1- coil；2- presoaks DMD insulating materials；3- gas channel supporting bar；4- epoxy plate；5- copper bar；A- air flue.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
A kind of low-voltage coil of dry type transformer including coil 1, is set to the preimpregnation DMD of coil interlayer as illustrated in fig. 1 and 2
Insulating materials 2, the gas channel supporting bar 3 for being set to coil interlayer, wherein gas channel supporting bar 3 forms air flue A after supporting coil, coil
The both side ends of outer layer, the internal layer of coil and air flue are provided with epoxy plate 4, and coil lead is using copper bar 5 after argon arc welding
It draws.
In the present invention, the interlayer of coil is using the internal layer and air flue for presoaking DMD insulating materials, the outer layer of coil, coil
Both side ends be all made of epoxy plate as insulating layer.Due to preimpregnation DMD insulating materials have proof voltage is high, dielectric loss is low,
Partial discharge amount is small, high mechanical strength, water imbibition are minimum, resistant to chemical etching etc., therefore presoaks interlayer of the DMD insulating materials as coil
Insulating materials, good insulating effect；Further, since epoxy plate heat-resist, good mechanical performance, therefore, the structure of air flue
Relatively stable, the thermal diffusivity of low-voltage coil of dry type transformer is good.
In the present invention, in order to guarantee certain insulating properties, while insulating materials is not wasted, presoaks the thickness of DMD insulating materials
Degree is 0.1 ~ 0.3 mm.It is preferred that preimpregnation DMD insulating materials with a thickness of 0.15 ~ 0.2 mm；Epoxy plate with a thickness of 0.1 ~ 1 mm,
It is preferred that epoxy plate with a thickness of 0.2 ~ 0.6 mm.
In the present invention, in order to improve the stability of air passage structure, gas channel supporting bar impregnates thermosetting property using alkali-free glass fibre
Resin is produced by pultrude process and is made.Gas channel supporting bar struts coil, further radiates convenient for low-voltage coil of dry type transformer
In the present invention, coil can be around being made as circle, oblong, any one in rectangular or ellipse.
A kind of production method of the upper and lower end seal of low-voltage coil of dry type transformer, comprising the following steps:
(1) in coil winding, interlayer places preimpregnation DMD insulating materials；
(2) gas channel supporting bar is placed in the interlayer of coil, while is placed in the end two sides for supporting the air flue formed by gas channel supporting bar
Epoxy plate；
(3) in coil winding, the outer layer of coil and the internal layer of coil place epoxy plate；
(4) coil after the completion of coiling is put into furnace, 1 ~ 5h is dried at a temperature of 100 ~ 200 DEG C.
In the preparation process, preferably in-furnace temperature is 130 ~ 140 DEG C, it is ensured that preimpregnation DMD insulating materials is in the temperature
It is heating and curing under degree, while also guaranteeing that epoxy plate will not deform at this temperature.
In the present invention, in order to carry out end seal up and down, the height of DMD insulating materials is greater than longitudinal height of coil copper conductor.
Coil after coiling places the DMD insulating materials that coil after heating, is higher by furnace in the upper and lower end face of coil solidification end seal, line
DMD insulating materials between ring layer makes coil interlayer form close entirety after being heating and curing.Being heating and curing not only realizes dry type
The technique of end seal above and below low voltage winding in transformers, while low-voltage coil interlayer also being made to form close entirety, enhance dry type change
Mechanical strength, the electrical strength of depressor low-voltage coil, while it being made to have excellent moisture-proof, anti-dust performance.
In the present invention, the height of epoxy plate is consistent with the height of DMD insulating materials.The design of this structure be for the ease of around
Coil after system carries out the end seal operation of upper and lower end face when being heating and curing.When hot setting, DMD insulating materials high temperature is solid
Change, so that low-voltage coil interlayer and end are tightly formed entirety, and epoxy plate is unlikely to deform under the operation temperature, due to air flue
The presence of both ends epoxy plate, and epoxy plate is consistent with the upper and lower end face height of coil, the effect of the end seal of low-voltage coil upper and lower end face
Fruit is good.
Embodiment 1:
A kind of low-voltage coil of dry type transformer including coil, the preimpregnation DMD insulating materials that is set to coil interlayer, is set to line
Gas channel supporting bar between ring layer, wherein form air flue, the outer layer of coil, the internal layer of coil, Yi Jiqi after gas channel supporting bar support coil
The both side ends in road are provided with epoxy plate, and coil lead is drawn after argon arc welding using copper bar.In the present embodiment, coil winding
At circle, presoak DMD insulating materials with a thickness of 0.17mm, epoxy plate with a thickness of 0.5mm.Gas channel supporting bar is that alkali-free glass is fine
A kind of profile that dimension dipping thermosetting resin is produced by pultrude process.
A kind of production method of the upper and lower end seal of low-voltage coil of dry type transformer, comprising the following steps:
(1) in coil winding, interlayer places preimpregnation DMD insulating materials；
(2) gas channel supporting bar is placed in the interlayer of coil, while is placed in the end two sides for supporting the air flue formed by gas channel supporting bar
Epoxy plate；
(3) in coil winding, the outer layer of coil and the internal layer of coil place epoxy plate；
(4) coil after the completion of coiling is put into furnace, dries 3h at a temperature of 135 DEG C.
Embodiment 2:
A kind of low-voltage coil of dry type transformer including coil, the preimpregnation DMD insulating materials that is set to coil interlayer, is set to line
Gas channel supporting bar between ring layer, wherein form air flue, the outer layer of coil, the internal layer of coil, Yi Jiqi after gas channel supporting bar support coil
The end two sides in road are provided with epoxy plate, and coil lead is drawn after argon arc welding using copper bar.In the present embodiment, coil winding
Long circle, preimpregnation DMD insulating materials with a thickness of 0.18mm, epoxy plate with a thickness of 0.5mm.Gas channel supporting bar is alkali-free glass
A kind of profile that fiber impregnation thermosetting resin is produced by pultrude process.
A kind of production method of the upper and lower end seal of low-voltage coil of dry type transformer, comprising the following steps:
(1) in coil winding, interlayer places preimpregnation DMD insulating materials；
(2) gas channel supporting bar is placed in the interlayer of coil, while is placed in the end two sides for supporting the air flue formed by gas channel supporting bar
Epoxy plate；
(3) in coil winding, the outer layer of coil and the internal layer of coil place epoxy plate；
(4) coil after the completion of coiling is put into furnace, dries 4h at a temperature of 130 DEG C.
Embodiment 3:
A kind of low-voltage coil of dry type transformer including coil, the preimpregnation DMD insulating materials that is set to coil interlayer, is set to line
Gas channel supporting bar between ring layer, wherein form air flue, the outer layer of coil, the internal layer of coil, Yi Jiqi after gas channel supporting bar support coil
The end two sides in road are provided with epoxy plate, and coil lead is drawn after argon arc welding using copper bar.In the present embodiment, coil winding
Ovalisation, preimpregnation DMD insulating materials with a thickness of 0.17mm, epoxy plate with a thickness of 0.5mm.Gas channel supporting bar is alkali-free glass
A kind of profile that fiber impregnation thermosetting resin is produced by pultrude process.
A kind of production method of the upper and lower end seal of low-voltage coil of dry type transformer, comprising the following steps:
(1) in coil winding, interlayer places preimpregnation DMD insulating materials；
(2) gas channel supporting bar is placed in the interlayer of coil, while is placed in the end two sides for supporting the air flue formed by gas channel supporting bar
Epoxy plate；
(3) in coil winding, the outer layer of coil and the internal layer of coil place epoxy plate；
(4) coil after the completion of coiling is put into furnace, dries 4h at a temperature of 130 DEG C.
Embodiment 4:
A kind of low-voltage coil of dry type transformer including coil, the preimpregnation DMD insulating materials that is set to coil interlayer, is set to line
Gas channel supporting bar between ring layer, wherein form air flue, the outer layer of coil, the internal layer of coil, Yi Jiqi after gas channel supporting bar support coil
The end two sides in road are provided with epoxy plate, and coil lead is drawn after argon arc welding using copper bar.In the present embodiment, coil winding
Squarely, preimpregnation DMD insulating materials with a thickness of 0.18mm, epoxy plate with a thickness of 0.5mm.Gas channel supporting bar is that alkali-free glass is fine
A kind of profile that dimension dipping thermosetting resin is produced by pultrude process.
A kind of production method of the upper and lower end seal of low-voltage coil of dry type transformer, comprising the following steps:
(1) in coil winding, interlayer places preimpregnation DMD insulating materials；
(2) gas channel supporting bar is placed in the interlayer of coil, while is placed in the end two sides for supporting the air flue formed by gas channel supporting bar
Epoxy plate；
(3) in coil winding, the outer layer of coil and the internal layer of coil place epoxy plate；
(4) coil after the completion of coiling is put into furnace, dries 2h at a temperature of 140 DEG C.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of low-voltage coil of dry type transformer, including coil, the preimpregnation DMD insulating materials that is set to coil interlayer, it is set to
The gas channel supporting bar of coil interlayer, the gas channel supporting bar form air flue after supporting coil, it is characterised in that: the outer layer of the coil,
The internal layer of coil and the end two sides of air flue are provided with epoxy plate, and the lead of the coil is drawn using copper bar.
2. a kind of low-voltage coil of dry type transformer according to claim 1, it is characterised in that: the preimpregnation DMD insulating materials
With a thickness of 0.1 ~ 0.3 mm.
3. a kind of low-voltage coil of dry type transformer according to claim 1, it is characterised in that: the gas channel supporting bar is alkali-free glass
Glass fiber impregnation thermosetting resin is produced by pultrude process and is made.
4. a kind of low-voltage coil of dry type transformer according to claim 1, it is characterised in that: the epoxy plate with a thickness of
0.1~1 mm。
5. a kind of low-voltage coil of dry type transformer according to claim 4, it is characterised in that: the lead of the coil uses copper
Row draws after argon arc welding.
6. a kind of low-voltage coil of dry type transformer according to claim 1, it is characterised in that: the coil winding be it is round,
Any one in oblong, rectangular or ellipse.
7. the production method of end seal above and below a kind of any one low-voltage coil of dry type transformer described according to claim 1 ~ 6,
It is characterized in that, comprising the following steps:
(1) in coil winding, interlayer places preimpregnation DMD insulating materials；
(2) gas channel supporting bar is placed in the interlayer of coil, while is placed in the end two sides for supporting the air flue formed by gas channel supporting bar
Epoxy plate；
(3) in coil winding, the outer layer of coil and the internal layer of coil place epoxy plate；
(4) coil after the completion of coiling is put into furnace, 1 ~ 5h is dried at a temperature of 100 ~ 200 DEG C.
8. the production method of end seal above and below a kind of low-voltage coil of dry type transformer according to claim 7, which is characterized in that furnace
The interior temperature is 130 ~ 140 DEG C.
9. the production method of end seal above and below a kind of low-voltage coil of dry type transformer according to claim 7, which is characterized in that institute
The placing height for stating DMD insulating materials is greater than longitudinal height of coil.
10. the production method of end seal above and below a kind of low-voltage coil of dry type transformer according to claim 7, which is characterized in that
The height of the epoxy plate is consistent with the height of DMD insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810817410.3A CN108933032A (en) | 2018-07-24 | 2018-07-24 | Low-voltage coil of dry type transformer and its upper and lower end seal production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810817410.3A CN108933032A (en) | 2018-07-24 | 2018-07-24 | Low-voltage coil of dry type transformer and its upper and lower end seal production method |
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| CN108933032A true CN108933032A (en) | 2018-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810817410.3A Pending CN108933032A (en) | 2018-07-24 | 2018-07-24 | Low-voltage coil of dry type transformer and its upper and lower end seal production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571296A (en) * | 2021-07-05 | 2021-10-29 | 广东中顺电气制造有限公司 | Universal air flue insulating plate for dry-type transformer and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104217851A (en) * | 2014-09-03 | 2014-12-17 | 宁波奥克斯高科技有限公司 | End sealing method for low-voltage foil type coil of dry type transformer |
| 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 |
-
2018
- 2018-07-24 CN CN201810817410.3A patent/CN108933032A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104217851A (en) * | 2014-09-03 | 2014-12-17 | 宁波奥克斯高科技有限公司 | End sealing method for low-voltage foil type coil of dry type transformer |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571296A (en) * | 2021-07-05 | 2021-10-29 | 广东中顺电气制造有限公司 | Universal air flue insulating plate for dry-type transformer and manufacturing method thereof |
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