CN109326431B - Oil immersed transformer and assembly method thereof - Google Patents
Oil immersed transformer and assembly method thereof Download PDFInfo
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- CN109326431B CN109326431B CN201811306121.3A CN201811306121A CN109326431B CN 109326431 B CN109326431 B CN 109326431B CN 201811306121 A CN201811306121 A CN 201811306121A CN 109326431 B CN109326431 B CN 109326431B
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- voltage winding
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004804 winding Methods 0.000 claims abstract description 108
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 96
- 229910052742 iron Inorganic materials 0.000 claims abstract description 22
- 239000011087 paperboard Substances 0.000 claims abstract description 18
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000011111 cardboard Substances 0.000 claims description 4
- 239000000123 paper Substances 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 2
- 238000005191 phase separation Methods 0.000 claims description 2
- 239000002023 wood Substances 0.000 abstract description 5
- 238000005253 cladding Methods 0.000 abstract 1
- 230000016507 interphase Effects 0.000 description 8
- 239000004744 fabric Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The invention provides an oil immersed transformer and an assembling method thereof, wherein the assembling steps are as follows: disassembling the upper clamping piece and the upper iron yoke; dismantling a coil winding press; sleeving a coil winding; the upper iron yoke is used for inserting the sheets and installing the upper clamping piece; the status of each component is checked. Simultaneously, oil-immersed transformer includes oil-immersed transformer body, oil-immersed transformer body inside is equipped with iron core and three-phase coil winding, coil winding all encircles the cladding in the iron core outside, and keep apart through alternate baffle between each coil winding, alternate baffle both sides offset with coil winding's surface respectively, coil winding includes high-voltage winding and low-voltage winding, low-voltage winding cover is established outside the iron core, high-voltage winding cover is established outside low-voltage winding, keep apart by insulating paperboard, stay or corrugated container board between low-voltage winding and the high-voltage winding, install the bounding wall between coil winding and the iron core, be equipped with insulating paperboard between bounding wall and the iron core. The transformer body is internally provided with insulating paper boards instead of laminated wood, so that the distance between the coil and the iron core is shortened.
Description
Technical Field
The invention relates to the field of oil-immersed transformers, in particular to an oil-immersed transformer and an assembly method thereof.
Background
The transformer is a heavy-voltage component in an electric power transmission and transformation system, the usage amount is huge, the main functions of the transformer are realized by the iron core, the high-voltage coil and the low-voltage coil together, in the currently used transformer, the high-voltage coil and the low-voltage coil form interphase windings together and encircle the iron core, and the interphase windings are isolated by a partition plate.
Laminated wood is arranged between the coil winding and the iron core, so that the distance between the coil winding and the iron core is overlarge, long-time operation of the transformer is not facilitated, and efficiency is not good enough.
Disclosure of Invention
The invention aims to provide an oil immersed transformer and an assembly method thereof, which have definite working procedures, and the transformer body is internally provided with insulating paperboards instead of laminated wood, so that the distance between a coil and an iron core is shortened, and the cost is reduced.
In order to achieve the above purpose, the invention provides an assembly method of an oil immersed transformer, which comprises the following specific steps:
step S1: disassembling the upper clamping piece and the upper iron yoke;
step S1.1: clamping the iron core by an iron core clamp;
step S1.2: dismantling the pull screw rod, and loosening the iron yoke screw rods at the two sides;
step S1.3: removing the upper clamping piece and the clamping piece for insulation;
step S1.4: disassembling an upper yoke from the iron core by adopting a yoke stacking process;
step S1.5: ending the disassembly of the upper iron yoke and taking down the iron core clamp;
Step S2: dismantling a coil winding press;
step S2.1: a pressure relief plate;
Step S2.2: checking coil windings, wherein the heights of the coil windings are consistent, and the positions of a coil outlet and a tapping outlet of the coil windings are aligned;
Step S2.3: the coil head is subjected to insulation wrapping;
step S3: sleeving a coil winding;
Step S3.1: the coil winding is fixed with the cushion block through two symmetrically arranged binding ropes, and the coil winding is lifted by the aid of the cushion block;
step S3.2: leveling the surface of the clip support with cardboard;
Step S3.3: sleeving the coil windings on an iron core, confirming the direction of the coil outlet, installing a coaming between the coil windings and the iron core along the circumference of the iron core, and installing a phase separation plate between adjacent coil windings;
step S3.4: the end parts of the coil windings are flat, so that the upper clamping piece and the lower clamping piece are parallel and have consistent distance and height;
Step S3.5: assembling an upper yoke insulator and the press plate;
step S4: the upper iron yoke is used for inserting sheets and installing the upper clamping piece;
step S4.1: sequentially carrying out inserting sheets from one side or gradually inserting sheets from the middle of the large stage to two sides;
step S4.2: installing the upper clamping piece, installing a grounding piece, tensioning the iron yoke screw rods on two sides and integrating the grounding piece;
Step S4.3: the grounding piece is inserted into the upper iron yoke and the lower iron yoke, and whether the upper clamping piece and the lower clamping piece are insulated by the iron core is detected.
Further, in the method for assembling an oil-immersed transformer, in step S2.3, the coil head is folded and then wrapped with crepe paper, and then a half-stacked layer of straight-line cloth tape is wrapped.
Further, in the method for assembling an oil immersed transformer, in step S3.3, the coil winding includes a low-voltage winding and a high-voltage winding, the high-voltage winding is sleeved outside the low-voltage winding, and an insulating paperboard, a stay or a corrugated paperboard is wrapped between the low-voltage winding and the high-voltage winding.
In the assembling method of the oil immersed transformer, in the step S4.1, the empty channel at the upper end of the coil winding is shielded before the inserting sheet, the inserting sheet is fastened by using a reverse U-shaped clamp, the reverse U-shaped clamp is pulled out by using a clamping piece bolt after the inserting sheet, and the upper iron yoke is clamped by using a fastening piece.
Further, in the assembling method of the oil immersed transformer, in step S4.2, when the diameter of the iron core is less than or equal to Φ200mm, the insertion depth of the grounding piece is 30mm; when the diameter of the iron core is phi 250-330 mm, the insertion depth of the grounding piece is 50mm.
Further, in the method for assembling an oil-immersed transformer, in step S4.2, the upper clip is insulated from the core by an insulating end ring.
The invention also provides an oil immersed transformer, which comprises an oil immersed transformer body, wherein an iron core and three-phase coil windings are arranged in the oil immersed transformer body, the coil windings are all wrapped on the outer side of the iron core in a surrounding mode, the coil windings are isolated through interphase separators, two sides of each interphase separator are respectively propped against the outer surface of the coil winding, the coil windings are composed of a high-voltage winding and a low-voltage winding, the low-voltage winding is sleeved on the outer side of the iron core, the high-voltage winding is sleeved on the outer side of the low-voltage winding, the low-voltage winding and the high-voltage winding are isolated by insulating paperboards, stay bars or corrugated paperboards, surrounding plates are arranged between the coil windings and the iron core, and insulating paperboards are arranged between the surrounding plates and the iron core.
Further, in the oil immersed transformer, the coaming is U-shaped, two coamings are opposite and the edges are lapped, and the insulating paper board is arranged at the lap joint position of the two coamings.
Further, in the oil immersed transformer, the overlap dimension of the coaming should be 30-50 mm.
Compared with the prior art, the invention has the beneficial effects that: the assembly process is clear. Meanwhile, the insulating paperboard is used for replacing laminated wood in the transformer body, so that the distance between the coil and the iron core is shortened, and the cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an oil immersed transformer according to the present invention;
FIG. 2 is a cross-sectional view of the structure of A-A in FIG. 1;
FIG. 3 is a cross-sectional view of the structure B-B in FIG. 2;
FIG. 4 is a schematic view of the radial structure of the coil and yoke insert of FIG. 3;
fig. 5 is a structural view of the lap joint of the coaming of fig. 2.
Wherein: upper clip 11, lower clip 12, upper yoke 21, lower yoke 22, core 3, platen 41, spacer 42, insulating end ring 43, coil winding 5, low voltage winding 51, high voltage winding 52, coil tap 53, coaming 61, interphase separator 62, insulating cardboard 63.
Detailed Description
The method of assembling an oil-filled transformer according to the invention will be described in more detail below with reference to the schematic drawings, in which preferred embodiments of the invention are shown, it being understood that the person skilled in the art can modify the invention described herein while still achieving the advantageous effects of the invention. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the invention.
In the description of the present invention, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present invention that the device or element referred to must have a specific azimuth configuration and operation.
In the present invention, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
The invention provides an oil immersed transformer and an assembly method thereof, and the method comprises the following specific steps:
step S1: disassembling the upper clamping piece 11 and the upper iron yoke 21;
step S1.1: clamping the iron core 3 by an iron core clamp;
step S1.2: dismantling the pull screw rod, and loosening the iron yoke screw rods at the two sides;
step S1.3: removing the upper clip 11 from the clip insulation;
Step S1.4: disassembling an upper yoke 21 for the iron core 3 adopting the process of stacking the upper yoke 21;
Step S1.5: the upper yoke 21 is disassembled, and the iron core clamp is removed;
step S2: dismantling a coil winding 5 presser;
step S2.1: a pressure-releasing plate 41;
step S2.2: checking the coil windings 5, wherein the heights of the coil windings 5 are consistent, and the positions of the coil heads 53 and the tapping wires of the coil windings 5 are aligned;
Step S2.3: the coil head 53 is insulation-wrapped; after the coil heads 53 are bent, the corrugated paper is wrapped, and then the straight-line cloth tapes are wrapped in a half-folded mode.
Step S3: sleeving a coil winding 5;
Step S3.1: a cushion block 42 is placed at the bottom side of the coil winding 5, the lifting hooks are symmetrically arranged below the cushion block 42, the coil winding 5 and the cushion block 42 are fixed through two symmetrically arranged binding ropes, and the lifting hooks lift the coil winding 5 by using the cushion block 42;
step S3.2: leveling the surface of the clip support with cardboard;
Step S3.3: sleeving the coil windings 5 on the iron core 3, confirming the direction of the coil heads 53, installing the coaming 61 between the coil windings 5 and the iron core 3 along the circumference of the iron core 3, and installing the interphase separating plates 62 between the adjacent coil windings 5; the coil winding 5 comprises a low-voltage winding 51 and a high-voltage winding 52, the high-voltage winding 52 is sleeved outside the low-voltage winding 51, and an insulating paperboard 63, a stay or a corrugated paperboard is wrapped between the low-voltage winding 51 and the high-voltage winding 52.
Step S3.4: the end parts of the coil windings 5 are flat, so that the upper clamping piece 11 and the lower clamping piece 12 are parallel and have consistent distance and height;
step S3.5: assembling an upper yoke 21 insulation and pressing plate 41;
step S4: the upper iron yoke 21 is used for inserting the sheets and installing the upper clamping piece 11;
Step S4.1: sequentially carrying out inserting sheets from one side or gradually inserting sheets from the middle of the large stage to two sides; the empty channel at the upper end of the coil winding 5 is shielded before the inserting sheet, the inserting sheet is fastened by using a reverse U-shaped clip, the reverse U-shaped clip is pulled out by using a clamping piece bolt after the inserting sheet, and the upper iron yoke 21 is clamped by a fastening piece.
Step S4.2: after the upper clamping piece 11 is installed, a grounding piece is installed, iron yoke screws on two sides are tensioned, and the whole piece is formed; when the diameter of the iron core 3 is less than or equal to phi 200mm, the insertion depth of the grounding piece is 30mm; when the diameter of the iron core 3 is phi 250-330 mm, the insertion depth of the grounding plate is 50mm. The upper clip 11 is insulated from the core 3 by an insulating end ring 43.
Step S4.3: the grounding plate is inserted into the upper yoke 21 and the lower yoke 22, and detects whether the iron core 3 insulates the upper clamp 11 and the lower clamp 12.
As shown in fig. 1 to 5, the invention further provides an oil-immersed transformer, which comprises an oil-immersed transformer body, wherein an iron core 3 and three-phase coil windings 5 are arranged in the oil-immersed transformer body, the coil windings 5 are all wrapped on the outer side of the iron core 3, the coil windings 5 are isolated by interphase separators 62, two sides of each interphase separator 62 respectively prop against the outer surface of the coil winding 5, the coil winding 5 is composed of a high-voltage winding 52 and a low-voltage winding 51, the low-voltage winding 51 is sleeved on the outer side of the iron core 3, the high-voltage winding 52 is sleeved on the outer side of the low-voltage winding 51, the low-voltage winding 51 and the high-voltage winding 52 are isolated by insulating paperboards 63, stay or corrugated boards, a coaming 61 is arranged between the coil windings 5 and the iron core 3, and an insulating paperboard 63 is arranged between the coaming 61 and the iron core 3.
Further, as shown in fig. 2, in the present embodiment, the high-voltage winding 52 and the low-voltage winding 51 are both in an oblong structure and coaxially distributed. As shown in fig. 5, the coaming 61 is U-shaped, two coamings 61 are opposite and overlap, and the insulating paper 63 is disposed at the overlap of the two coamings 61. The overlap dimension of the shroud 61 should be in the range of 30 to 50mm.
In summary, in the present embodiment, the proposed method for assembling an oil-immersed transformer has a clear assembly process. Meanwhile, the insulating paperboard is used for replacing laminated wood in the transformer body, so that the distance between the coil and the iron core is shortened, and the cost is reduced.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art will make any equivalent substitution or modification to the technical solution and technical content disclosed in the invention without departing from the scope of the technical solution of the invention, and the technical solution of the invention is not departing from the scope of the invention.
Claims (6)
1. The assembling method of the oil immersed transformer is characterized by comprising the following specific steps:
step S1: disassembling the upper clamping piece and the upper iron yoke;
step S1.1: clamping the iron core by an iron core clamp;
step S1.2: dismantling the pull screw rod, and loosening the iron yoke screw rods at the two sides;
step S1.3: removing the upper clamping piece and the clamping piece for insulation;
step S1.4: disassembling an upper yoke from the iron core by adopting a yoke stacking process;
step S1.5: ending the disassembly of the upper iron yoke and taking down the iron core clamp;
Step S2: dismantling a coil winding press;
step S2.1: a pressure relief plate;
Step S2.2: checking coil windings, wherein the heights of the coil windings are consistent, and the positions of a coil outlet and a tapping outlet of the coil windings are aligned;
Step S2.3: the coil head is subjected to insulation wrapping;
step S3: sleeving a coil winding;
Step S3.1: the coil winding is fixed with the cushion block through two symmetrically arranged binding ropes, and the coil winding is lifted by the aid of the cushion block;
step S3.2: leveling the surface of the clip support with cardboard;
Step S3.3: sleeving the coil windings on an iron core, confirming the direction of the coil outlet, installing a coaming between the coil windings and the iron core along the circumference of the iron core, and installing a phase separation plate between adjacent coil windings;
step S3.4: the end parts of the coil windings are flat, so that the upper clamping piece and the lower clamping piece are parallel and have consistent distance and height;
Step S3.5: assembling an upper yoke insulator and the press plate;
step S4: the upper iron yoke is used for inserting sheets and installing the upper clamping piece;
step S4.1: sequentially carrying out inserting sheets from one side or gradually inserting sheets from the middle of the large stage to two sides;
step S4.2: installing the upper clamping piece, installing a grounding piece, tensioning the iron yoke screw rods on two sides and integrating the grounding piece;
Step S4.3: the grounding piece is inserted into the upper iron yoke and the lower iron yoke, and whether the upper clamping piece and the lower clamping piece are insulated by the iron core is detected.
2. The method of assembling an oil immersed transformer according to claim 1, wherein in step S2.3, the coil heads are folded and wrapped around crepe paper, and then wrapped with straight woven tape half-stacked.
3. The method of assembling an oil immersed transformer according to claim 1, wherein in step S3.3, the coil winding comprises a low voltage winding and a high voltage winding, the high voltage winding is sleeved outside the low voltage winding, and an insulating paperboard, a stay or a corrugated paperboard is wrapped between the low voltage winding and the high voltage winding.
4. The method for assembling an oil immersed transformer according to claim 1, wherein in step S4.1, the empty channel at the upper end of the coil winding is shielded before the insertion, the insertion is fastened by using a "pi" shaped clip, the "pi" shaped clip is pulled out by using a clamp bolt after the insertion, and the upper yoke is clamped by a fastener.
5. The method of assembling an oil immersed transformer according to claim 1, wherein in step S4.2, when the core diameter is equal to or less than Φ200mm, the insertion depth of the grounding plate is 30mm; when the diameter of the iron core is phi 250-330 mm, the insertion depth of the grounding piece is 50mm.
6. The method of assembling an oil immersed transformer according to claim 1, wherein in step S4.2, the upper clip member is insulated from the core by an insulating end ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811306121.3A CN109326431B (en) | 2018-11-05 | Oil immersed transformer and assembly method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811306121.3A CN109326431B (en) | 2018-11-05 | Oil immersed transformer and assembly method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109326431A CN109326431A (en) | 2019-02-12 |
| CN109326431B true CN109326431B (en) | 2024-06-28 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105225809A (en) * | 2015-11-16 | 2016-01-06 | 国家电网公司 | A kind of oil-filled transformer of new structure |
| CN206558326U (en) * | 2017-02-22 | 2017-10-13 | 山东华尚电气有限公司 | A kind of insulation system of oil immersed type high overload transformer body |
| CN209029220U (en) * | 2018-11-05 | 2019-06-25 | 中变集团上海变压器有限公司 | A kind of oil-immersed transformer |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105225809A (en) * | 2015-11-16 | 2016-01-06 | 国家电网公司 | A kind of oil-filled transformer of new structure |
| CN206558326U (en) * | 2017-02-22 | 2017-10-13 | 山东华尚电气有限公司 | A kind of insulation system of oil immersed type high overload transformer body |
| CN209029220U (en) * | 2018-11-05 | 2019-06-25 | 中变集团上海变压器有限公司 | A kind of oil-immersed transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240604 Address after: No. 158 Fengyong Road, Qingcun Town, Fengxian District, Shanghai, 2014 Applicant after: SHANGHAI NAIJI ELECTRIC POWER GROUP CO.,LTD. Country or region after: China Address before: 201506 Building 2, No. 4185, Tingwei Road, Jinshan Industrial Zone, Jinshan District, Shanghai Applicant before: CHINA ZHONGBIAN GROUP SHANGHAI TRANSFORMER Co.,Ltd. Country or region before: China |
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| GR01 | Patent grant |