CN113948298A - Lining shielding structure for shell type transformer core and mounting method - Google Patents
Lining shielding structure for shell type transformer core and mounting method Download PDFInfo
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- CN113948298A CN113948298A CN202111246839.XA CN202111246839A CN113948298A CN 113948298 A CN113948298 A CN 113948298A CN 202111246839 A CN202111246839 A CN 202111246839A CN 113948298 A CN113948298 A CN 113948298A
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- lining
- iron core
- shield
- shields
- shaped beam
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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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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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
Abstract
The invention relates to a lining shielding structure for a shell type transformer core and an installation method, and belongs to the technical field of transformer devices and methods. The technical scheme is as follows: the two upper lining shields (1) are respectively arranged at two corners at the upper end of the iron core (8), and the two lower lining shields (3) are respectively arranged at two corners at the lower end of the iron core; an upper T-shaped beam shield (9) and a lower T-shaped beam shield (10) are symmetrically arranged at the upper part and the lower part of the iron core, the two upper lining shields are lapped at the upper end of the iron core, and an upper oil through plate (2) is arranged between the upper lining shield and the upper T-shaped beam shield; the two lower lining shields (3) are lapped at the lower end of the iron core, and the lower oil passing plate (4) is arranged between the lower T-shaped beam shield (10) and the lower lining shields (3); two lining insulators (7) are arranged on the left side and the right side of the iron core (8) respectively. The invention has the beneficial effects that: by arranging the lining shield, the electric field at the corner of the iron core is effectively alleviated, and the method has wide applicability.
Description
Technical Field
The invention relates to a lining shielding structure for a shell type transformer core and an installation method, and belongs to the technical field of transformer equipment and methods.
Background
The core flux circuit of the shell transformer is outside the coil, with the core surrounding the coil. The shell type transformer coil is formed by vertically arranging and connecting a plurality of rectangular wire cakes according to a specified sequence, high-voltage windings and low-voltage windings are arranged in a staggered mode, and iron core laminations are horizontally stacked along the periphery of the coil, so that an electric field is concentrated at the corner of an iron core inside the coil.
Disclosure of Invention
The invention aims to provide a lining shielding structure for a shell type transformer core and an installation method, which effectively alleviate the electric field at the corner of the core by arranging the lining shielding, have wide applicability and effectively solve the problems in the background technology.
The technical scheme of the invention is as follows: the lining shielding structure for the shell type transformer iron core comprises an upper lining shield, an upper oil through plate, a lower lining shield, a lower oil through plate and a lining insulator, wherein the number of the upper lining shields is two, the upper lining shields are respectively arranged at two corners at the upper end of the iron core, and the number of the lower lining shields is two, and the lower lining shields are respectively arranged at two corners at the lower end of the iron core; the upper part and the lower part of the iron core are symmetrically provided with an upper T-shaped beam shield and a lower T-shaped beam shield, the two upper lining shields are lapped at the upper end of the iron core, and an upper oil through plate is arranged between the upper lining shields and the upper T-shaped beam shields; the two lower lining shields are lapped at the lower end of the iron core, and the lower oil passing plate is arranged between the lower T-shaped beam shield and the lower lining shield; the two liners are insulated and are respectively arranged on the left side and the right side of the iron core.
The two upper lining shields are overlapped by 75mm at the upper end of the iron core, and the two lower lining shields are overlapped by 75mm at the lower end of the iron core.
The upper lining shield and the lower lining shield are composed of two layers of 1.5mm paperboards, stainless steel metal meshes and polytetrafluoroethylene electric wires, and the bending radiuses of the two layers of 1.5mm paperboards are matched with the voltage grade.
The upper oil passing plate and the lower oil passing plate are formed by sticking 5mm insulating cushion blocks on a 3mm paper board.
The lining insulation is composed of two layers of 2.5mm paperboards, a cushion block of 3mm is pasted in the middle, an iron core cooling cushion block of 2.5mm is pasted at the innermost side, a groove of 100mm is formed in the paperboards in an overlapping mode, the paperboard is 90mm in an overlapping mode, and the bending radius is matched with the voltage grade.
A method for installing a lining shielding structure for a shell type transformer core is characterized by comprising the following steps:
firstly, overlapping upper lining shields at two corners of the upper end of an iron core by 75mm at the upper end of the iron core, arranging an upper oil-passing plate between an upper T-shaped beam shield positioned at the upper part of the iron core and the upper lining shield, then arranging an upper insulating plate, and grounding a grounding wire of the upper lining shield through the iron core;
lapping the lower lining shields at two corners of the lower end of the iron core by 75mm, arranging a lower oil passing plate between the lower T-shaped beam shield at the lower part of the iron core and the lower lining shield, then arranging a lower insulating plate, and grounding the grounding wire of the lower lining shield through the iron core;
and the linings are arranged on the left side and the right side of the iron core in an insulating way.
The thickness of the upper insulating plate and the lower insulating plate is 3 mm.
The invention has the beneficial effects that: by providing the inner liner shield, the electric field at the corner of the core can be effectively relaxed, and the method has wide applicability.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: the oil-gas separator comprises an upper lining shield 1, an upper oil through plate 2, a lower lining shield 3, a lower oil through plate 4, an upper insulating plate 5, a lower insulating plate 6, a lining insulator 7, an iron core 8, an upper T-shaped beam shield 9 and a lower T-shaped beam shield 10.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments, which are preferred embodiments of the present invention. It is to be understood that the described embodiments are merely a subset of the embodiments of the invention, and not all embodiments; it should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A lining shielding structure for a shell type transformer iron core comprises an upper lining shield 1, an upper oil through plate 2, a lower lining shield 3, a lower oil through plate 4 and a lining insulator 7, wherein the number of the upper lining shields 1 is two, and the two lining shields are respectively arranged at two corners at the upper end of the iron core 8, and the number of the lower lining shields 3 is two and respectively arranged at two corners at the lower end of the iron core 8; an upper T-shaped beam shield 9 and a lower T-shaped beam shield 10 are symmetrically arranged at the upper part and the lower part of the iron core 8, the upper ends of the two upper lining shields 1 of the iron core 8 are lapped by 75mm, and an upper oil through plate 2 is arranged between the upper lining shield 1 and the upper T-shaped beam shield 9; the lower ends of the iron cores 8 of the two lower lining shields 3 are lapped by 75mm, and the lower oil through plate 4 is arranged between the lower T-shaped beam shield 10 and the lower lining shield; the two lining insulators 7 are respectively arranged at the left side and the right side of the iron core 8.
The upper lining shield 1 and the lower lining shield 3 are composed of two layers of 1.5mm paperboards, stainless steel metal meshes and polytetrafluoroethylene electric wires, and the bending radiuses of the two layers of 1.5mm paperboards are matched with the voltage grades.
The upper oil through plate 2 and the lower oil through plate 4 are formed by adhering 5mm insulating cushion blocks to 3mm paperboards.
The lining insulation 7 is composed of two layers of 2.5mm paperboards, a cushion block of 3mm is pasted in the middle, an iron core cooling cushion block of 2.5mm is pasted in the innermost layer, a groove of 100mm is formed in the paperboards in an overlapping mode, the paperboard is 90mm in an overlapping mode, and the bending radius is matched with the voltage grade.
A method for installing a lining shielding structure for a shell type transformer core is characterized by comprising the following steps:
firstly, overlapping upper lining shields at two corners of the upper end of an iron core by 75mm at the upper end of the iron core, arranging an upper oil-passing plate between an upper T-shaped beam shield positioned at the upper part of the iron core and the upper lining shield, then arranging an upper insulating plate, and grounding a grounding wire of the upper lining shield through the iron core;
lapping the lower lining shields at two corners of the lower end of the iron core by 75mm, arranging a lower oil passing plate between the lower T-shaped beam shield at the lower part of the iron core and the lower lining shield, then arranging a lower insulating plate, and grounding the grounding wire of the lower lining shield through the iron core;
and the linings are arranged on the left side and the right side of the iron core in an insulating way.
The thickness of the upper insulating plate 5 and the lower insulating plate 6 is 3 mm.
Claims (6)
1. The utility model provides a shell type transformer is inside lining shielding structure for iron core which characterized in that: the transformer comprises an upper lining shield (1), an upper oil passing plate (2), a lower lining shield (3), a lower oil passing plate (4) and lining insulators (7), wherein the number of the upper lining shields (1) is two, the upper lining shields are respectively arranged at two corners of the upper end of an iron core (8), the number of the lower lining shields (3) is two, and the lower lining shields are respectively arranged at two corners of the lower end of the iron core (8); an upper T-shaped beam shield (9) and a lower T-shaped beam shield (10) are symmetrically arranged at the upper part and the lower part of the iron core (8), the two upper lining shields (1) are lapped at the upper end of the iron core (8), and an upper oil through plate (2) is arranged between the upper lining shield (1) and the upper T-shaped beam shield (9); the two lower lining shields (3) are lapped at the lower end of the iron core (8), and the lower oil passing plate (4) is arranged between the lower T-shaped beam shield (10) and the lower lining shields (3); two lining insulators (7) are arranged on the left side and the right side of the iron core (8) respectively.
2. A shell-in-tube transformer core liner shield structure as recited in claim 1, wherein: the upper lining shield (1) and the lower lining shield (3) are composed of two layers of 1.5mm paperboards, stainless steel metal nets and polytetrafluoroethylene electric wires, and the bending radiuses of the two layers of 1.5mm paperboards are matched with the voltage grade.
3. A shell-in-tube transformer core liner shield structure as recited in claim 1, wherein: the upper oil passing plate (2) and the lower oil passing plate (4) are formed by adhering 5mm insulating cushion blocks to 3mm paperboards.
4. A shell-in-tube transformer core liner shield structure as recited in claim 1, wherein: the lining insulation (7) is composed of two layers of 2.5mm paperboards, a cushion block of 3mm is pasted in the middle, an iron core cooling cushion block of 2.5mm is pasted in the innermost part, grooves of 100mm are formed in the paperboards in an overlapping mode, the gaps are 90mm in the overlapping mode, and the bending radius is matched with the voltage grade.
5. A method for installing a lining shielding structure for a shell type transformer core is characterized by comprising the following steps:
firstly, overlapping upper lining shields at two corners of the upper end of an iron core by 75mm at the upper end of the iron core, arranging an upper oil-passing plate between an upper T-shaped beam shield positioned at the upper part of the iron core and the upper lining shield, then arranging an upper insulating plate, and grounding a grounding wire of the upper lining shield through the iron core;
lapping the lower lining shields at two corners of the lower end of the iron core by 75mm, arranging a lower oil passing plate between the lower T-shaped beam shield at the lower part of the iron core and the lower lining shield, then arranging a lower insulating plate, and grounding the grounding wire of the lower lining shield through the iron core;
and the linings are arranged on the left side and the right side of the iron core in an insulating way.
6. The method of claim 5, wherein the step of mounting the inner liner shielding structure comprises: the thickness of the upper insulating plate and the lower insulating plate is 3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111246839.XA CN113948298A (en) | 2021-10-26 | 2021-10-26 | Lining shielding structure for shell type transformer core and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111246839.XA CN113948298A (en) | 2021-10-26 | 2021-10-26 | Lining shielding structure for shell type transformer core and mounting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113948298A true CN113948298A (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111246839.XA Withdrawn CN113948298A (en) | 2021-10-26 | 2021-10-26 | Lining shielding structure for shell type transformer core and mounting method |
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| Country | Link |
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| CN (1) | CN113948298A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA845321A (en) * | 1970-06-23 | A. Veitch Robert | Core shield for shell form transformers | |
| US3967226A (en) * | 1975-06-10 | 1976-06-29 | Westinghouse Electric Corporation | Electrical inductive apparatus having magnetic shielding cores and a gapped main core structure |
| CN1672226A (en) * | 2002-08-16 | 2005-09-21 | 西门子公司 | Winding arrangement |
| CN101777416A (en) * | 2010-03-15 | 2010-07-14 | 贵阳新星变压器有限公司 | Rectangular fillet iron core for shell type transformer |
| CN203225158U (en) * | 2013-04-28 | 2013-10-02 | 中国西电电气股份有限公司 | Iron core sheet sharp corner shielding structure |
| CN216250366U (en) * | 2021-10-26 | 2022-04-08 | 保定保菱变压器有限公司 | Lining shielding structure for shell type transformer iron core |
-
2021
- 2021-10-26 CN CN202111246839.XA patent/CN113948298A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA845321A (en) * | 1970-06-23 | A. Veitch Robert | Core shield for shell form transformers | |
| US3967226A (en) * | 1975-06-10 | 1976-06-29 | Westinghouse Electric Corporation | Electrical inductive apparatus having magnetic shielding cores and a gapped main core structure |
| CN1672226A (en) * | 2002-08-16 | 2005-09-21 | 西门子公司 | Winding arrangement |
| CN101777416A (en) * | 2010-03-15 | 2010-07-14 | 贵阳新星变压器有限公司 | Rectangular fillet iron core for shell type transformer |
| CN203225158U (en) * | 2013-04-28 | 2013-10-02 | 中国西电电气股份有限公司 | Iron core sheet sharp corner shielding structure |
| CN216250366U (en) * | 2021-10-26 | 2022-04-08 | 保定保菱变压器有限公司 | Lining shielding structure for shell type transformer iron core |
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Application publication date: 20220118 |
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| WW01 | Invention patent application withdrawn after publication |