CN107546018B - Three-phase combined type voltage transformer internal body with primary melting core - Google Patents
Three-phase combined type voltage transformer internal body with primary melting core Download PDFInfo
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- CN107546018B CN107546018B CN201710952221.2A CN201710952221A CN107546018B CN 107546018 B CN107546018 B CN 107546018B CN 201710952221 A CN201710952221 A CN 201710952221A CN 107546018 B CN107546018 B CN 107546018B
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- 230000008018 melting Effects 0.000 title claims abstract description 13
- 238000002844 melting Methods 0.000 title claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 93
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003822 epoxy resin Substances 0.000 claims abstract description 11
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 11
- 239000002131 composite material Substances 0.000 claims description 5
- 229910052573 porcelain Inorganic materials 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920006267 polyester film Polymers 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 description 12
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a three-phase combined type voltage transformer inner body with a primary melting core, which comprises an iron core, a primary winding and a secondary winding, wherein the primary winding and the iron core are connected through a hoisting connecting piece, the position is unchanged, the primary winding and the secondary winding are bonded through an epoxy resin layer, a primary connecting insert is led out of the primary winding, and a fuse is connected to the primary connecting insert.
Description
Technical Field
The invention relates to the field of voltage transformers, in particular to a three-phase combined type voltage transformer inner body with a primary melting core.
Background
In the operation of the power system, the voltage transformer is one of important equipment of the power system, the stable operation capability of the voltage transformer is very critical, the internal body (iron core, primary winding and secondary winding) of the original three-phase combined voltage transformer is mainly cast in a secondary casting mode, the primary winding cannot be positioned, the position relationship between the primary winding and the secondary winding is ensured during primary casting, therefore, the primary winding and the secondary winding are firstly required to be cast and connected, then the internal body and the porcelain shell are cast into a whole, in order to ensure the efficiency of primary casting, the PMP composite film is directly used for casting, and after casting, the primary winding and the secondary winding are easy to break down in power frequency and partially discharge, and the production efficiency of the voltage transformer is greatly reduced.
Disclosure of Invention
Aiming at the problems, the invention provides a three-phase combined type voltage transformer inner body with a primary melting core, which has the characteristic of intelligent temperature control and improves the safety of a switch cabinet.
The specific technical scheme is as follows:
the three-phase combined voltage transformer inner body with the primary melting core comprises an iron core, a primary winding and a secondary winding, wherein the iron core is of a rectangular frame structure, the secondary winding is wound on the iron core, the primary winding component is sleeved on the secondary winding in two sections, and the primary winding and the secondary winding are bonded together through an epoxy resin layer;
the primary winding and the secondary winding are cylindrical, and the axes of the cylindrical shapes of the primary winding and the secondary winding are the same straight line;
the upper end of the primary winding is provided with symmetrical hoisting connecting pieces at two sides, each hoisting connecting piece comprises a connecting plate and an insulating column, each connecting plate comprises a first connecting plate and a second connecting plate, the first connecting plate is arc-shaped, the lower end face of the first connecting plate is clung to the outer surface of the primary winding and is adhered and fixed with the primary winding through epoxy resin adhesive, and the second connecting plate and the first connecting plate are of an integrated structure and are vertically attached to each other; the upper end of the insulating column is fixedly connected with one side of the second connecting plate through a screw, and the lower end of the insulating column is fixedly connected with the iron core;
a primary connection insert is led out of the primary winding, and a fuse is connected to the primary connection insert; PMP composite films are coated outside the primary winding and the secondary winding, and a polyester film, insulating crepe paper and semiconductor crepe paper are sequentially coated on the outer surface of the iron core from inside to outside.
The three-phase combined type voltage transformer inner body with the primary melting core, wherein the iron core, the primary winding and the secondary winding are connected with the magnetic shell of the voltage transformer into a whole in a casting mode.
The three-phase combined type voltage transformer inner body with the primary melting core, wherein the primary connecting insert and the fuse are embedded into a column casing of the voltage transformer.
The beneficial effects of the invention are as follows:
the invention provides a three-phase combined type voltage transformer inner body with a primary melting core, which comprises an iron core, a primary winding and a secondary winding, wherein the primary winding and the iron core are connected through a hoisting connecting piece, the position is unchanged, the primary winding and the secondary winding are bonded through an epoxy resin layer, a primary connecting insert is led out of the primary winding, and a fuse is connected to the primary connecting insert.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Figure 2 is a side view of the present invention (without the primary connecting insert and fuse).
Fig. 3 is a sectional view of a region A.
Fig. 4 is a schematic diagram of a voltage transformer.
Detailed Description
In order to make the technical scheme of the invention clearer and more definite, the invention is further described below with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent substitution and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention.
The utility model provides a three-phase combination type voltage transformer internal body with a primary melting core, which comprises an iron core 1, a primary winding 2 and a secondary winding 3, wherein the iron core 1 is in a rectangular frame structure, the secondary winding 3 is wound on the iron core 1, the primary winding 2 is sleeved on the secondary winding 3 in two sections, and the primary winding 2 and the secondary winding 3 are bonded together through an epoxy resin layer 4;
the primary winding 2 and the secondary winding 3 are cylindrical, and the axes of the cylindrical shapes of the primary winding 2 and the secondary winding 3 are the same straight line;
symmetrical hoisting connectors are arranged on two sides of the upper end of the primary winding 2, each hoisting connector comprises a connecting plate 4 and an insulating column 5, each connecting plate 4 comprises a first connecting plate 41 and a second connecting plate 42, each first connecting plate 41 is in a circular arc shape, the lower end face of each first connecting plate 41 is tightly attached to the outer surface of the primary winding 2 and is fixedly adhered to the primary winding 2 through an epoxy resin adhesive, and each second connecting plate 42 and each first connecting plate 41 are in an integrated structure and are vertically attached to each first connecting plate 41; the upper end of the insulating column 5 is fixedly connected with one side of the second connecting plate 42 through a screw, and the lower end of the insulating column is fixedly connected with the iron core 1;
a primary connection insert 6 is led out of the primary winding 2, and a fuse 7 is connected to the primary connection insert 6; the primary winding 2 and the secondary winding 3 are respectively coated with a PMP composite film, and the outer surface of the iron core 1 is sequentially coated with a polyester film 8, an insulating crepe paper 9 and a semiconductor crepe paper 10 from inside to outside.
The three-phase combined voltage transformer with the primary melting core is characterized in that the iron core 1, the primary winding 2 and the secondary winding 3 are connected with the porcelain shell 12 of the voltage transformer 11 into a whole in a casting mode.
The three-phase combined type voltage transformer inner body with the primary melting core is characterized in that the primary connecting insert 6 and the fuse 7 are embedded in the column casing 13 of the voltage transformer 11.
In the embodiment, as the iron core, the primary winding and the secondary winding of the internal body component of the voltage transformer, the installation mode is different from the old secondary pouring mode, and the hanging connecting piece is arranged, so that the primary winding and the iron core are stable in position, and the internal body component is connected with the porcelain shell of the voltage transformer; and then directly using an epoxy resin mixture, casting the mixture into a whole, automatically forming an epoxy resin layer between the primary winding and the secondary winding, and bonding the primary winding and the secondary winding.
The primary winding cannot be positioned, so that the primary winding and the secondary winding are firstly required to be connected in a casting mode, then the inner body and the porcelain shell can be cast into a whole, in order to ensure the efficiency of primary casting, a PMP composite film is directly adopted for casting, and after casting, the primary winding and the secondary winding are easy to break down in power frequency and are partially discharged.
Claims (2)
1. The three-phase combined voltage transformer inner body with the primary melting core comprises an iron core, a primary winding and a secondary winding, wherein the iron core is of a rectangular frame structure, the secondary winding is wound on the iron core, the primary winding component is sleeved on the secondary winding in two sections, and the primary winding and the secondary winding are bonded together through an epoxy resin layer;
the primary winding and the secondary winding are cylindrical, and the axes of the cylindrical shapes of the primary winding and the secondary winding are the same straight line;
the upper end of the primary winding is provided with symmetrical hoisting connecting pieces at two sides, each hoisting connecting piece comprises a connecting plate and an insulating column, each connecting plate comprises a first connecting plate and a second connecting plate, the first connecting plate is arc-shaped, the lower end face of the first connecting plate is clung to the outer surface of the primary winding and is adhered and fixed with the primary winding through epoxy resin adhesive, and the second connecting plate and the first connecting plate are of an integrated structure and are vertically attached to each other; the upper end of the insulating column is fixedly connected with one side of the second connecting plate through a screw, and the lower end of the insulating column is fixedly connected with the iron core;
a primary connection insert is led out of the primary winding, and a fuse is connected to the primary connection insert; PMP composite films are coated outside the primary winding and the secondary winding, and a polyester film, insulating crepe paper and semiconductor crepe paper are sequentially coated on the outer surface of the iron core from inside to outside;
the iron core, the primary winding and the secondary winding are connected with the magnetic shell of the voltage transformer into a whole in a pouring mode;
the mounting mode of the internal body of the voltage transformer is as follows:
the primary winding is connected with the iron core through the hoisting connecting piece, so that the position is ensured to be unchanged; the iron core, the primary winding and the secondary winding which are included in the inner transformer body of the voltage transformer are connected with the porcelain shell of the voltage transformer, and then the voltage transformer is cast into a whole by using epoxy resin mixture.
2. The three-phase combined voltage transformer inner body with a primary fuse as claimed in claim 1, wherein the primary connection insert and the fuse are embedded in a cylinder of the voltage transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952221.2A CN107546018B (en) | 2017-10-13 | 2017-10-13 | Three-phase combined type voltage transformer internal body with primary melting core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952221.2A CN107546018B (en) | 2017-10-13 | 2017-10-13 | Three-phase combined type voltage transformer internal body with primary melting core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107546018A CN107546018A (en) | 2018-01-05 |
| CN107546018B true CN107546018B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710952221.2A Active CN107546018B (en) | 2017-10-13 | 2017-10-13 | Three-phase combined type voltage transformer internal body with primary melting core |
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| Country | Link |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108831726A (en) * | 2018-06-05 | 2018-11-16 | 河南森源电气股份有限公司 | A kind of voltage transformer |
| CN108630420B (en) * | 2018-07-16 | 2023-06-09 | 国网四川省电力公司电力科学研究院 | Three-phase three-element combined transformer |
| CN112735793B (en) * | 2020-12-21 | 2022-05-10 | 北京中车赛德铁道电气科技有限公司 | Double-flow system voltage transformer for locomotive |
| CN113724964B (en) * | 2021-07-21 | 2023-11-03 | 华为数字能源技术有限公司 | Transformer and insulating packaging method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203118750U (en) * | 2013-01-14 | 2013-08-07 | 深圳市第二互感器科技有限公司 | Voltage transformer |
| CN203799854U (en) * | 2014-04-30 | 2014-08-27 | 江苏苏爱尔电力设备有限公司 | Pouring type voltage transformer body |
| CN203966826U (en) * | 2014-07-25 | 2014-11-26 | 湖北新天成电气有限公司 | Winding locating support of a kind of voltage transformer |
| CN204360905U (en) * | 2015-02-03 | 2015-05-27 | 淄博川煦电气科技有限公司 | A kind of voltage transformer winding supporting structure |
| CN204792372U (en) * | 2015-07-10 | 2015-11-18 | 合肥元贞电力科技股份有限公司 | Dry -type electrical transformer cored winding part mounting structure |
| KR20160114975A (en) * | 2015-03-25 | 2016-10-06 | 주식회사 평일 | potential transformer having separation type fuse |
| CN206040379U (en) * | 2016-08-31 | 2017-03-22 | 中国西电集团公司 | Voltage transformer |
-
2017
- 2017-10-13 CN CN201710952221.2A patent/CN107546018B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203118750U (en) * | 2013-01-14 | 2013-08-07 | 深圳市第二互感器科技有限公司 | Voltage transformer |
| CN203799854U (en) * | 2014-04-30 | 2014-08-27 | 江苏苏爱尔电力设备有限公司 | Pouring type voltage transformer body |
| CN203966826U (en) * | 2014-07-25 | 2014-11-26 | 湖北新天成电气有限公司 | Winding locating support of a kind of voltage transformer |
| CN204360905U (en) * | 2015-02-03 | 2015-05-27 | 淄博川煦电气科技有限公司 | A kind of voltage transformer winding supporting structure |
| KR20160114975A (en) * | 2015-03-25 | 2016-10-06 | 주식회사 평일 | potential transformer having separation type fuse |
| CN204792372U (en) * | 2015-07-10 | 2015-11-18 | 合肥元贞电力科技股份有限公司 | Dry -type electrical transformer cored winding part mounting structure |
| CN206040379U (en) * | 2016-08-31 | 2017-03-22 | 中国西电集团公司 | Voltage transformer |
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| Publication number | Publication date |
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| CN107546018A (en) | 2018-01-05 |
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