CN220400389U - 35 kV-level grounding transformer body insulation structure - Google Patents
35 kV-level grounding transformer body insulation structure Download PDFInfo
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- CN220400389U CN220400389U CN202322115412.7U CN202322115412U CN220400389U CN 220400389 U CN220400389 U CN 220400389U CN 202322115412 U CN202322115412 U CN 202322115412U CN 220400389 U CN220400389 U CN 220400389U
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- iron yoke
- winding
- iron
- iron core
- clamping piece
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- 238000009413 insulation Methods 0.000 title claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 155
- 238000004804 winding Methods 0.000 claims abstract description 84
- 229910052742 iron Inorganic materials 0.000 claims abstract description 63
- 238000003825 pressing Methods 0.000 claims abstract description 24
- 238000005192 partition Methods 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000003921 oil Substances 0.000 claims description 9
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical compound [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 230000016507 interphase Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- Insulating Of Coils (AREA)
Abstract
The utility model relates to a 35 kV-level grounding transformer body insulation structure, which comprises an iron core and a winding arranged on the iron core, wherein the iron core is arranged on the iron core; the winding comprises a low-voltage winding and a high-voltage winding which are sleeved together, two sides of an upper iron yoke of the iron core are clamped and fixed through an upper clamping piece and a bolt, two sides of a lower iron yoke of the iron core are clamped and fixed through a lower clamping piece and a bolt, and the upper clamping piece and the lower clamping piece are connected and fixed through a tensile long screw; the upper end and the lower end of each two adjacent windings are respectively provided with an iron yoke baffle, the back surface of each iron yoke baffle is provided with a special pressing plate, and one special pressing plate presses the two adjacent windings simultaneously. The utility model has the beneficial effects that the iron yoke partition plate is adopted, the partition plate support plate is adopted at intervals, the resin insulation cylinder is additionally arranged at the outer side of the winding, so that the iron core and the winding are combined into a whole, the upper and lower insulation structures of the winding and the resin insulation cylinder at the outer side of the winding enhance the mechanical property of the transformer, the short circuit resistance of the transformer and the performance of the transformer.
Description
Technical Field
The utility model relates to a 35 kV-level grounding transformer body insulation structure, and belongs to the technical field of transformers.
Background
Along with the rapid development of economy and science and technology, the stability requirement of a power grid is continuously improved, a large number of compensating arc extinction complete equipment and resistance grounding devices are installed in the power distribution network in China, and the grounding transformer is an important part matched with the compensating arc extinction complete equipment. The grounding transformer has the function of providing an artificial neutral point for a system with a neutral point which is not grounded, and is convenient to adopt an arc suppression coil or small-resistance grounding mode so as to reduce the magnitude of capacitance current to the ground when the power distribution network has a grounding short circuit fault and improve the power supply reliability of the power distribution system.
Disclosure of Invention
The utility model provides a 35 kV-level grounding transformer body insulation structure for overcoming the defects in the prior art.
The technical scheme of the utility model is as follows:
a35 kV-level grounding transformer body insulation structure is characterized in that: the 35 kV-level grounding transformer body comprises an iron core and a winding arranged on the iron core; the winding comprises a low-voltage winding and a high-voltage winding which are sleeved together, two sides of an upper iron yoke of the iron core are clamped and fixed through an upper clamping piece and a bolt, two sides of a lower iron yoke of the iron core are clamped and fixed through a lower clamping piece and a bolt, and the upper clamping piece and the lower clamping piece are connected and fixed through a tensile long screw;
the upper end and the lower end of each two adjacent phase winding are respectively provided with an iron yoke baffle, and one iron yoke baffle presses the two adjacent phase windings simultaneously; the back of the iron yoke baffle plate is provided with a special pressing plate, and one special pressing plate presses adjacent two-phase windings simultaneously.
The number of the high-voltage windings is 2, the first high-voltage winding is sleeved outside the iron core, the low-voltage winding is sleeved outside the first high-voltage winding, and the second high-voltage winding is sleeved outside the low-voltage winding.
An iron yoke insulating part is clamped between the two sides of the upper iron yoke and the upper clamping piece, and an iron yoke insulating part is clamped between the two sides of the lower iron yoke and the lower clamping piece.
A baffle support plate in the vertical direction is additionally arranged between two adjacent windings to support the iron yoke baffle; the upper end and the lower end of the winding are sleeved with insulating end rings and are provided with a plurality of layers of insulating base plates, the insulating end rings and the insulating base plates are circular, and the insulating base plates and the iron yoke partition plates are inlaid together.
The outer side of the winding is additionally provided with a resin insulating cylinder, a resin insulating cylinder is sleeved in a gap between the low-voltage winding and the high-voltage winding which are sleeved together, a large number of oil passage struts in the vertical direction are also inserted in the gap, and a cooling oil passage is formed in the gap between two adjacent oil passage struts.
The two ends of the iron yoke partition board are wide, the middle is narrow, and the two sides of the narrow part are arc-shaped concave for accommodating adjacent iron core columns; the two ends of the iron yoke partition plate are provided with grooves which are used for accommodating the tension long screw rods.
The special pressing plate is C-shaped, one end of the special pressing plate, which is close to the iron yoke, is provided with a slope, the slope is formed by a plurality of layers of steps, and corresponds to the step formed by a cylindrical structure formed by stacking a plurality of layers of silicon steel sheets on the iron yoke, and the slope stretches into the bottom of the upper iron yoke or the upper part of the lower iron yoke so as to compress the winding; the special pressing plate is provided with a hole for accommodating the tension long screw rod, and the special pressing plate and the iron yoke partition plate are fixed through the tension long screw rod.
The utility model has the beneficial effects that the upper end ring and the lower end ring of the winding are embedded together with the iron yoke partition board in an insulating way, the upper end ring and the lower end ring of the winding are supported by the pressing plate in an interphase way, the outer side of the winding is additionally provided with the resin insulating cylinder, the iron core and the winding are combined into a whole by the application of the structure, the upper insulating structure, the lower insulating structure and the outer side of the winding are used for enhancing the mechanical performance of the transformer, the short circuit resistance of the transformer is improved, and the performance of the transformer is improved. The design is mainly applied to improving the insulation and short-circuit resistance of the transformer body.
Drawings
The attached drawing is a schematic structural diagram of the utility model. FIG. 1 is a side view of a body half; FIG. 2 is a top plan view of the body; FIG. 3 is a top view of an iron yoke spacer; fig. 4 and 5 are top and left views of the dedicated platen in sequence.
In the figure, an iron yoke insulator 1, an iron yoke separator 2, a dedicated pressing plate 3, a separator support plate 4, and a resin insulation tube 5. The high-voltage winding comprises an iron core 6, a low-voltage winding 7, an upper iron yoke 8, an upper clamping piece 9, a lower iron yoke 10, a lower clamping piece 11, a first high-voltage winding 13, a second high-voltage winding 14, a step 15, a hole 16, an insulating end ring 17, a groove 18 and an insulating base plate 19.
Detailed Description
The drawings illustrate one embodiment of the utility model.
The utility model relates to a 35 kV-level grounding transformer body insulation structure, which comprises an iron core 6 and a winding arranged on the iron core, wherein the iron core is provided with a plurality of windings; the winding comprises a low-voltage winding 7 and a high-voltage winding which are sleeved together, two sides of an upper iron yoke 8 of the iron core are clamped and fixed through an upper clamping piece 9 and a bolt, two sides of a lower iron yoke 10 of the iron core are clamped and fixed through a lower clamping piece 11 and a bolt, and the upper clamping piece and the lower clamping piece are connected and fixed through a tensile long screw;
the upper end and the lower end of each two adjacent windings are respectively provided with an iron yoke baffle plate 2, and one iron yoke baffle plate presses the two adjacent windings simultaneously; the back of the iron yoke partition plate is provided with a special pressing plate 3, and one special pressing plate presses adjacent two-phase windings simultaneously.
The number of the high-voltage windings is 2, the first high-voltage winding 13 is sleeved outside the iron core 6, the low-voltage winding 7 is sleeved outside the first high-voltage winding, and the second high-voltage winding 14 is sleeved outside the low-voltage winding.
The iron yoke insulation pieces 1 are arranged between the two sides of the upper iron yoke 8 and the upper clamping piece 9, and the iron yoke insulation pieces 1 are arranged between the two sides of the lower iron yoke 10 and the lower clamping piece 11.
A baffle support plate 4 in the vertical direction is additionally arranged between two adjacent phase windings, so that the iron yoke baffle plate 2 is supported; the upper and lower ends of the winding are sleeved with insulating end rings 17 and are padded with a plurality of layers of insulating base plates 19, the insulating end rings and the insulating base plates are circular, and the insulating base plates are inlaid with the yoke partition plates 2.
The outer side of the winding is additionally provided with a resin insulation cylinder 5, a resin insulation cylinder 5 is sleeved in a gap between the low-voltage winding and the high-voltage winding which are sleeved together, a large number of oil passage struts in the vertical direction are also inserted in the gap, and a cooling oil passage is formed in the gap between two adjacent oil passage struts.
The two ends of the iron yoke partition plate 2 are wide, the middle is narrow, and the two sides of the narrow part are arc-shaped concave for accommodating adjacent iron core columns; the yoke spacer has grooves 18 at both ends for receiving the tension long screws.
The special pressing plate 3 is C-shaped, one end of the special pressing plate, which is close to the iron yoke, is provided with a slope, the slope is formed by a plurality of layers of steps 15, and corresponds to the step formed by a cylindrical structure formed by stacking a plurality of layers of silicon steel sheets on the iron yoke, and the slope stretches into the bottom of the upper iron yoke or the upper part of the lower iron yoke so as to compress the winding; the special pressing plate is provided with a hole 16 for accommodating a tension long screw rod, and the special pressing plate 3 and the iron yoke baffle plate 2 are fixed through the tension long screw rod.
According to the 35 kV-level grounding transformer body insulation structure, upper and lower iron yoke insulation, iron yoke partition plates and a special pressing plate are additionally arranged on a transformer winding, partition plate supports are additionally arranged at intervals, and a resin insulation cylinder is additionally arranged at the outer side of the winding.
The practice proves that the upper end ring and the lower end ring of the winding are embedded together with the iron yoke partition plate in an insulating way, the interphase is supported by adopting the pressing plate, the outer side of the winding is additionally provided with the resin insulating cylinder, the iron core and the winding are combined into a whole, the upper and lower insulation of the winding and the resin insulating cylinder at the outer side of the winding enhance the mechanical performance of the transformer, the short circuit resistance capability of the transformer is improved, and the performance of the transformer is improved. The design is mainly applied to improving the insulation and short-circuit resistance of the transformer body. The method is applied to all 35 kV-level grounding transformer structures.
Claims (7)
1. A35 kV-level grounding transformer body insulation structure is characterized in that: the 35 kV-level grounding transformer body comprises an iron core and a winding arranged on the iron core; the winding comprises a low-voltage winding and a high-voltage winding which are sleeved together, two sides of an upper iron yoke of the iron core are clamped and fixed through an upper clamping piece and a bolt, two sides of a lower iron yoke of the iron core are clamped and fixed through a lower clamping piece and a bolt, and the upper clamping piece and the lower clamping piece are connected and fixed through a tensile long screw;
the upper end and the lower end of each two adjacent phase winding are respectively provided with an iron yoke baffle, and one iron yoke baffle presses the two adjacent phase windings simultaneously; the back of the iron yoke baffle plate is provided with a special pressing plate, and one special pressing plate presses adjacent two-phase windings simultaneously.
2. The 35kV grounding transformer body insulation structure according to claim 1, characterized in that: the number of the high-voltage windings is 2, the first high-voltage winding is sleeved outside the iron core, the low-voltage winding is sleeved outside the first high-voltage winding, and the second high-voltage winding is sleeved outside the low-voltage winding.
3. The 35kV grounding transformer body insulation structure according to claim 1 or 2, characterized in that: an iron yoke insulating part is clamped between the two sides of the upper iron yoke and the upper clamping piece, and an iron yoke insulating part is clamped between the two sides of the lower iron yoke and the lower clamping piece.
4. The 35kV grounding transformer body insulation structure according to claim 1 or 2, characterized in that: a baffle support plate in the vertical direction is additionally arranged between two adjacent windings to support the iron yoke baffle; the upper end and the lower end of the winding are sleeved with insulating end rings and are provided with a plurality of layers of insulating base plates, the insulating end rings and the insulating base plates are circular, and the insulating base plates and the iron yoke partition plates are inlaid together.
5. The 35kV grounding transformer body insulation structure according to claim 1 or 2, characterized in that: the outer side of the winding is additionally provided with a resin insulating cylinder, a resin insulating cylinder is sleeved in a gap between the low-voltage winding and the high-voltage winding which are sleeved together, a large number of oil passage struts in the vertical direction are also inserted in the gap, and a cooling oil passage is formed in the gap between two adjacent oil passage struts.
6. The 35kV grounding transformer body insulation structure according to claim 1 or 2, characterized in that: the two ends of the iron yoke partition board are wide, the middle is narrow, and the two sides of the narrow part are arc-shaped concave for accommodating adjacent iron core columns; the two ends of the iron yoke partition plate are provided with grooves which are used for accommodating the tension long screw rods.
7. The 35kV grounding transformer body insulation structure according to claim 1 or 2, characterized in that: the special pressing plate is C-shaped, one end of the special pressing plate, which is close to the iron yoke, is provided with a slope, the slope is formed by a plurality of layers of steps, and corresponds to the step formed by a cylindrical structure formed by stacking a plurality of layers of silicon steel sheets on the iron yoke, and the slope stretches into the bottom of the upper iron yoke or the upper part of the lower iron yoke so as to compress the winding; the special pressing plate is provided with a hole for accommodating the tension long screw rod, and the special pressing plate and the iron yoke partition plate are fixed through the tension long screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322115412.7U CN220400389U (en) | 2023-08-08 | 2023-08-08 | 35 kV-level grounding transformer body insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322115412.7U CN220400389U (en) | 2023-08-08 | 2023-08-08 | 35 kV-level grounding transformer body insulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220400389U true CN220400389U (en) | 2024-01-26 |
Family
ID=89600695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322115412.7U Active CN220400389U (en) | 2023-08-08 | 2023-08-08 | 35 kV-level grounding transformer body insulation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220400389U (en) |
-
2023
- 2023-08-08 CN CN202322115412.7U patent/CN220400389U/en active Active
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