CN206558326U - A kind of insulation system of oil immersed type high overload transformer body - Google Patents
A kind of insulation system of oil immersed type high overload transformer body Download PDFInfo
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- CN206558326U CN206558326U CN201720159655.2U CN201720159655U CN206558326U CN 206558326 U CN206558326 U CN 206558326U CN 201720159655 U CN201720159655 U CN 201720159655U CN 206558326 U CN206558326 U CN 206558326U
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- cushion block
- iron core
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- coil
- pressboard
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Abstract
The utility model provides a kind of insulation system of oil immersed type high overload transformer body, including insulating structure of iron core and core insulation structure, insulating structure of iron core includes oil and becomes dispensing DMD and stay, oil becomes dispensing DMD jacket casings between iron core and low-voltage coil, and stay is arranged on oil and becomes dispensing DMD between iron core.Core insulation structure includes pre- pressboard and cushion block, cushion block is adhesively fixed on pre- pressboard, pre- pressboard is arranged on the end of both sides above and below coil, cushion block is pressed in the end of both sides above and below coil, cushion block has multiple, it is to be separated with gap between a cushion block group, two cushion blocks of a cushion block group with two adjacent cushion blocks of side end that low-voltage coil, which is press respectively against, with high-tension coil.The insulation system improves the dielectric strength of transformer body local hot spot, beneficial to the radiating of coil, it is ensured that device body insulation structure it is safe and reliable, extend the service life of high overload transformer.
Description
Technical field
The utility model is related to oil immersed type high overload field transformer, and in particular to a kind of oil immersed type high overload transformer device
The insulation system of body.
Background technology
Oil immersed type high overload transformer is the transformer generally used during current rural power grids are configured, high overload transformer overload
Operation inevitably results in transformer temperature rise, transformer scaling loss easily occurs.The device of oil immersed type high overload transformer at this stage
Body insulation or the structure for adding wooden unit using common cardboard, the insulation of device body is not strengthened in local hot spot, core insulation
Structure do not improve be unfavorable for coil inside radiating.In transformer in the case of longtime running, device body insulation in part can be burnt
Fall or aging, so as to cause transformer fault.Based on this, existing structure needs further to be improved.
Utility model content
For the incomplete problem of insulation system on existing oil immersed type high overload transformer, the utility model provides one
The insulation system of oil immersed type high overload transformer body is planted, the insulation system of high overload transformer body is improved, improves height
Overload the service life of transformer.
The utility model uses following technical scheme：
A kind of insulation system of oil immersed type high overload transformer body, oil immersed type high overload transformer includes iron core, low pressure
Coil and high-tension coil, low-voltage coil are enclosed on iron core, and high-tension coil is enclosed on low-voltage coil, and insulation system includes core insulation
Structure and core insulation structure, insulating structure of iron core include oil and become dispensing DMD and stay, and oil becomes dispensing DMD jacket casings in iron core
Between low-voltage coil, stay is arranged on oil and becomes dispensing DMD between iron core；The core insulation structure includes pre- pressboard
And cushion block, cushion block is adhesively fixed on pre- pressboard, and pre- pressboard is arranged on the end of both sides above and below coil, and cushion block is pressed in coil
The end of both sides up and down, cushion block has multiple, is press respectively against low-voltage coil and adjacent two cushion blocks of the high-tension coil with side end
For a cushion block group, gap is separated between two cushion blocks of a cushion block group.
Preferably, the spacing that the stay is in tooth adjacent in comb shape, stay is 25 millimeters to 30 millimeters, and stay has
Four pieces, wherein two pieces of line part offices being symmetricly set on iron core long axis direction, two pieces are symmetricly set on iron core final stage in addition
Both sides.
Preferably, by heat, wet fibrous material is made the pre- pressboard, and pre- pressboard is class loop configuration.
Preferably, the cushion block is shaped as trapezoidal, and cushion block is color wood quality, between two cushion blocks of a cushion block group
Oil duct between gap and low-voltage coil and high-tension coil is corresponding.
Preferably, the distance in the gap is bigger than the size of oil duct 2 to 3 millimeters.
The utility model has an advantageous effect in that：
The insulation system for the oil immersed type high overload transformer body that the utility model is provided, oil becomes the insulation of dispensing DMD
Grade is F grades, and stay also uses F class F insulating material Fs, enhances the class of insulation of high-temperature region between low-voltage coil and iron core, and
The stay of comb shape not only fastens coil and iron core but also reduces the contact area of iron core and coil, is more beneficial for radiating.
Pre- pressboard is manufactured under conditions of heating and pressurize at the same time, the characteristic with very high resistance to compression and anti-tensile, and cushion block is used
Color wood quality quality is hard, it is vacuum dried after be not in distortion and cracking, improve the service life of transformer；One pad
Gap between two cushion blocks of block group is corresponding with the oil duct between low-voltage coil and high-tension coil, it is ensured that the oil in oil duct
Unimpeded conveying, is conducive to the radiating of coil, and processes simple, easy to make.
The insulation system improves the dielectric strength of transformer body local hot spot, beneficial to the radiating of coil, it is ensured that
Device body insulation structure it is safe and reliable, extend the service life of high overload transformer.
Brief description of the drawings
Fig. 1 is the front view of the insulation system of oil immersed type high overload transformer body.
Fig. 2 is the top view of the insulation system of oil immersed type high overload transformer body.
Fig. 3 becomes DMD schematic diagrames of dispensing for oil.
Fig. 4 is the structural representation of stay.
Fig. 5 is the structural representation of pre- pressboard and cushion block.
Embodiment
The utility model is specifically described below in conjunction with the accompanying drawings：
With reference to Fig. 1 to Fig. 5, a kind of insulation system of oil immersed type high overload transformer body, oil immersed type high overload transformer
Including iron core 1, low-voltage coil 6 and high-tension coil 7, low-voltage coil 6 is enclosed on iron core 1, and high-tension coil 7 is enclosed on low-voltage coil 6.
The quantity of coil can have multiple, herein simply illustrated with two coils.
As depicted in figs. 1 and 2, wherein, insulation system include insulating structure of iron core and core insulation structure, core insulation knot
Structure includes oil and becomes dispensing DMD cylinders 5 and stay 8, and oil becomes dispensing DMD cylinders 5 and is enclosed between iron core 1 and low-voltage coil 6, as shown in figure 3,
Oil becomes the very thin thickness of dispensing DMD, about 0.2 to 0.24 millimeter.
It is again by low pressure coiling mill after cutter is sheared according to required length and width that oil, which becomes dispensing DMD cylinders 5,
Formed by tool winding, oil becomes the dispensing DMD class of insulation into F grades, instead of A grades of the insulating board of traditional structure.Transformer
Iron core and low-voltage coil all generate heat during operation, therefore the region between low-voltage coil and iron core is high-temperature region, so utilizing oily height
The class of insulation that DMD, glue is enhanced herein, extension uses transformer life.
Stay is arranged on oil and becomes dispensing DMD between iron core, and stay uses F class F insulating material Fs.As shown in figure 4, stay
In comb shape, the spacing of adjacent tooth is 25 millimeters to 30 millimeters in stay；Stay has four pieces, wherein two pieces are symmetricly set on
Line part office on iron core long axis direction, in addition two pieces be symmetricly set on iron core final stage both sides.Stay not only fastens line
Circle is more beneficial for transformer radiating with iron core and reducing the contact area of iron core and coil.
As shown in Figure 1, Figure 2 with shown in Fig. 5, core insulation structure includes pre- pressboard 2 and cushion block 3, and pre- pressboard is class annular
Structure, cushion block 3 is adhesively fixed on pre- pressboard 2, and pre- pressboard 2 is arranged on the end 4 of both sides above and below coil, and cushion block 3 is pressed in
The end 4 of both sides above and below coil.
Pre- pressboard is cut into the size of end turn as needed, the internal diameter of pre- pressboard 2 is than low-voltage coil 6
Internal diameter is small 2 millimeters, and the external diameter of pre- pressboard 2 is bigger than the external diameter of high-tension coil 72 millimeters.
Pre- pressboard is that wet fiber is manufactured in the case where heating and pressurizeing while acting on by heat, heat and wet fiber has
After plasticity, contractingization solid, the characteristic with very high resistance to compression and anti-tensile is manufactured than alone pressure.
Being shaped as cushion block 3 is trapezoidal, and cushion block 3 is color wood quality, and color is woodenly hard, it is vacuum dried after be not in torsion
Bent and cracking.
Cushion block 3 has multiple, and it is one with two adjacent cushion blocks of side end to be press respectively against low-voltage coil with high-tension coil
Gap 10 is separated between cushion block group 31, two cushion blocks of a cushion block group 31.Gap between two cushion blocks of one cushion block group
Oil duct 9 between 10 and low-voltage coil and high-tension coil is corresponding, and the distance in gap 10 is bigger than the size of oil duct 92 to 3 millimeters.
Cushion block processing is simple, easy to make, and gap 10 ensure that the oily unimpeded conveying in oil duct 9, is conducive to dissipating for coil
Heat.
The insulation system improves the dielectric strength of transformer body local hot spot, beneficial to the radiating of coil, it is ensured that
Device body insulation structure it is safe and reliable, extend the service life of high overload transformer.
Certainly, described above is not that, to limitation of the present utility model, the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in essential scope of the present utility model, also should
Belong to protection domain of the present utility model.
Claims (5)
1. a kind of insulation system of oil immersed type high overload transformer body, oil immersed type high overload transformer includes iron core, low-voltage line
Circle and high-tension coil, low-voltage coil are enclosed on iron core, and high-tension coil is enclosed on low-voltage coil, it is characterised in that insulation system bag
Insulating structure of iron core and core insulation structure are included, insulating structure of iron core includes oil and becomes dispensing DMD and stay, and oil becomes dispensing DMD
Jacket casing is between iron core and low-voltage coil, and stay is arranged on oil and becomes dispensing DMD between iron core；The core insulation structure bag
Pre- pressboard and cushion block are included, cushion block is adhesively fixed on pre- pressboard, pre- pressboard is arranged on the end of both sides above and below coil, padded
Block is pressed in the end of both sides above and below coil, and cushion block has multiple, is press respectively against low-voltage coil with high-tension coil with the adjacent of side end
Two cushion blocks be to be separated with gap between cushion block group, two cushion blocks of a cushion block group.
2. the insulation system of a kind of oil immersed type high overload transformer body according to claim 1, it is characterised in that described
Stay is in that the spacing of tooth adjacent in comb shape, stay is 25 millimeters to 30 millimeters, and stay has four pieces, wherein two pieces symmetrically set
Put the line part office on iron core long axis direction, in addition two pieces be symmetricly set on iron core final stage both sides.
3. the insulation system of a kind of oil immersed type high overload transformer body according to claim 1, it is characterised in that described
By heat, wet fibrous material is made pre- pressboard, and pre- pressboard is class loop configuration.
4. the insulation system of a kind of oil immersed type high overload transformer body according to claim 1, it is characterised in that described
Being shaped as cushion block is trapezoidal, and cushion block is the gap and low-voltage coil and height between color wood quality, two cushion blocks of a cushion block group
Oil duct between line ball circle is corresponding.
5. the insulation system of a kind of oil immersed type high overload transformer body according to claim 4, it is characterised in that described
The distance in gap is bigger than the size of oil duct 2 to 3 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720159655.2U CN206558326U (en) | 2017-02-22 | 2017-02-22 | A kind of insulation system of oil immersed type high overload transformer body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720159655.2U CN206558326U (en) | 2017-02-22 | 2017-02-22 | A kind of insulation system of oil immersed type high overload transformer body |
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| Publication Number | Publication Date |
|---|---|
| CN206558326U true CN206558326U (en) | 2017-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720159655.2U Active CN206558326U (en) | 2017-02-22 | 2017-02-22 | A kind of insulation system of oil immersed type high overload transformer body |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108231379A (en) * | 2017-12-18 | 2018-06-29 | 保定天威集团特变电气有限公司 | The insulation system of 35kV high-temperature-resisting transformers |
| CN109326431A (en) * | 2018-11-05 | 2019-02-12 | 中变集团上海变压器有限公司 | A kind of oil-immersed transformer and its assembly method |
| CN109326431B (en) * | 2018-11-05 | 2024-06-28 | 上海耐吉电力集团有限公司 | Oil immersed transformer and assembly method thereof |
-
2017
- 2017-02-22 CN CN201720159655.2U patent/CN206558326U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108231379A (en) * | 2017-12-18 | 2018-06-29 | 保定天威集团特变电气有限公司 | The insulation system of 35kV high-temperature-resisting transformers |
| CN109326431A (en) * | 2018-11-05 | 2019-02-12 | 中变集团上海变压器有限公司 | A kind of oil-immersed transformer and its assembly method |
| CN109326431B (en) * | 2018-11-05 | 2024-06-28 | 上海耐吉电力集团有限公司 | Oil immersed transformer and assembly method thereof |
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