CN213211925U - Insulation structure for increasing insulation strength between transformer coil and on-load tap-changer - Google Patents
Insulation structure for increasing insulation strength between transformer coil and on-load tap-changer Download PDFInfo
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- CN213211925U CN213211925U CN202022557714.6U CN202022557714U CN213211925U CN 213211925 U CN213211925 U CN 213211925U CN 202022557714 U CN202022557714 U CN 202022557714U CN 213211925 U CN213211925 U CN 213211925U
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Abstract
The utility model relates to an increase transformer coil and on-load tap-changer dielectric strength's insulation system belongs to transformer insulation technical field. The technical scheme is as follows: be equipped with spacing round steel (9) on folder upper limb board (8), spacing round steel (9) on folder upper limb board (8) set up in the blind hole one of terminal surface under insulating layer board (10), be equipped with bakelite screw rod (11) between the blind hole two of terminal surface and the screw thread blind hole of insulating layer board up end under the lamination cardboard cushion (12), the up end of lamination cardboard cushion (12) and insulating paper circle one (13) down the terminal surface bonding together, terminal surface bonding is at the up end of insulating paper circle one under insulating cushion (1), the winding sets up the up end at insulating cushion, the external diameter side of winding (7) is equipped with stay (4), insulating paper board (2) are tied up in the stay outside through shrink area (3). The utility model provides a transformer satisfy the problem of insulating properties requirement in limited space, make the safe operation effectively of transformer.
Description
Technical Field
The utility model relates to an increase transformer coil and on-load tap-changer dielectric strength's insulation system belongs to transformer insulation technical field.
Background
At present, the market competition of transformers is more severe, and under the severe market background, how to increase the insulation strength inside the transformer in an effective space becomes a technical problem solved by transformer manufacturers, and the occupied area of the existing insulation structure is large, so that the cost is increased. There is an urgent need in the art to develop an insulation structure for increasing the insulation strength between a transformer coil and an on-load tap-changer.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an increase transformer coil and have insulation strength's between load tap-changer insulation structure has solved the firm problem of insulating board promptly effectively, increases insulating board again with coil and have between the load tap-changer, has increased dielectric strength, has guaranteed electrical property, and area is with low costs, has solved the problem that exists among the background art.
The technical scheme of the utility model is that:
an insulation structure for increasing the insulation strength between a transformer coil and an on-load tap-changer comprises an insulation cushion block, an insulation paper board, a contraction band, a stay, a winding, a clamp upper limb board, a limiting round steel, an insulation supporting plate, a bakelite screw rod, a laminated paper board cushion block, an insulation paper ring I and an on-load tap-changer, wherein the clamp upper limb board is welded on a lower clamp web plate, the insulation supporting plate, the laminated paper board cushion block, the insulation supporting plate I and the insulation cushion block are sequentially arranged on the clamp upper limb board from bottom to top, the limiting round steel is arranged on the clamp upper limb board, the upper end surface and the lower end surface of the insulation supporting plate are respectively provided with a threaded blind hole and a blind hole I, the lower end surface of the laminated paper board cushion block is provided with a blind hole II corresponding to the threaded blind hole, the limiting round steel on the clamp upper limb board is arranged in the blind hole I on the lower end surface of the insulation supporting, the upper end face of the laminated paperboard cushion block is bonded with the lower end face of the insulating paper ring, the lower end face of the insulating cushion block is bonded on the upper end face of the insulating paper ring I, the bottom end of the winding is arranged on the upper end face of the insulating cushion block, a stay is arranged on the outer diameter side of the winding, and the insulating paperboard is tightly tied outside the stay through a contraction band and is adjacent to an on-load tap-changer.
The winding is formed by alternately winding an oil duct cushion block and a wire cake, and the stay is arranged on the groove on the outer side wall of the oil duct cushion block.
The insulating cushion blocks are multiple and radially arranged along the circumferential direction of the winding.
The lower clamping piece web plates are respectively arranged on two sides of the lower iron yoke of the transformer, the upper limb plates of the clamping pieces are four and two are in a group, and the two groups of upper limb plates of the clamping pieces are respectively and symmetrically arranged on the outer sides of the corresponding lower clamping piece web plates.
The insulating paperboard is arc-shaped.
The insulating supporting plate is in a ring shape.
The upper limb plate of the clamping piece and the insulating supporting plate are fixed through limiting round steel, the insulating supporting plate and the laminated paper board cushion block are fixed through a bakelite screw rod, and the laminated paper board cushion block and the first insulating paper ring are bonded together through an adhesive.
The utility model discloses a stand insulating board on insulating cushion to through shrink area firmly ligature on transformer coil, play increase transformer coil and have the purpose of insulating strength between the on-load tap-changer.
The utility model has the advantages that: the problem that the transformer meets the requirement of insulation performance in a limited space is solved, and the transformer can safely and effectively operate. The installation and fixation mode is simple, convenient and easy, and is stable and safe. The electric distance of the transformer is ensured, the volume of the transformer is effectively reduced, and the effects of saving materials, reducing consumption and increasing the market competitiveness of transformer manufacturers are achieved.
Drawings
Fig. 1 is a schematic top view of the present invention;
FIG. 2 is a sectional view taken along the line P-P in FIG. 1
FIG. 3 is a side view of an insulating paperboard;
FIG. 4 is a top view of an insulating paperboard;
FIG. 5 is a schematic diagram of an oil passage block structure;
FIG. 6 is a schematic view of the installation of oil duct spacers, wire cakes and external stays;
FIG. 7 is a top view of an insulating pallet;
FIG. 8 is a side view of an insulating pallet;
in the figure: the transformer coil comprises an insulating cushion block 1, an insulating paper board 2, a contraction band 3, a stay 4, an oil duct cushion block 5, a wire cake 6, a winding 7, a clamp upper limb plate 8, limiting round steel 9, an insulating supporting plate 10, a bakelite screw 11, a laminated paper board cushion block 12, an insulating paper ring I13, an on-load tap-changer 14, an insulating end ring I15, an insulating paper cylinder 16, an insulating paper ring II 17, an insulating end ring II 18, an insulating pressing plate 19, a press-fitting cushion block 20, a lower clamp web plate 21 and a transformer lower iron yoke 22.
Detailed Description
The present invention will be further described with reference to the accompanying drawings by way of examples.
An insulation structure for increasing the insulation strength between a transformer coil and an on-load tap-changer comprises an insulation cushion block 1, an insulation paper board 2, a contraction band 3, a stay 4, a winding 7, a clamp upper limb board 8, limiting round steel 9, an insulation supporting board 10, a bakelite screw 11, a laminated paper board cushion block 12, an insulation paper ring I13 and an on-load tap-changer 14, wherein the clamp upper limb board 8 is welded on a lower clamp web, the insulation supporting board 10, the laminated paper board cushion block 12, the insulation paper ring I13 and the insulation cushion block 1 are sequentially arranged on the clamp upper limb board 8 from bottom to top, the limiting round steel 9 is arranged on the clamp upper limb board 8, the upper end face and the lower end face of the insulation supporting board 10 are respectively provided with a threaded blind hole and a blind hole I, the lower end face of the laminated paper board 12 is provided with a blind hole II corresponding to the threaded blind hole, the limiting round steel 9 on the clamp upper limb, a bakelite screw rod 11 is arranged between a second blind hole on the lower end face of the laminated paperboard cushion block 12 and a threaded blind hole on the upper end face of the insulating support plate 10, the upper end face of the laminated paperboard cushion block 12 is adhered to the lower end face of the insulating paper ring 13, the lower end face of the insulating cushion block 1 is adhered to the upper end face of the insulating paper ring 13, the bottom end of the winding 7 is arranged on the upper end face of the insulating cushion block 1, a stay 4 is arranged on the outer diameter side of the winding 7, and the insulating paperboard 2 is tightly tied outside the stay 4 through a contraction band 3 and is adjacent to an on-load tap-changer.
The winding 7 is formed by alternately winding an oil duct cushion block 5 and a wire cake 6, and the stay 4 is arranged on a groove on the outer side wall of the oil duct cushion block 5.
The insulating cushion blocks 1 are arranged in a radial mode along the circumferential direction of the winding 7.
The number of the lower clamping piece web plates is two, the lower clamping piece web plates are respectively arranged on two sides of the lower iron yoke 22 of the transformer, the number of the clamping piece upper limb plates 8 is four, the two clamping piece upper limb plates are in a group, and the two groups of the clamping piece upper limb plates 8 are respectively and symmetrically arranged on the outer sides of the corresponding lower clamping piece web plates.
The insulating paper board 2 is arc-shaped.
The insulating supporting plate 10 is circular.
Referring to fig. 1 and 2, an insulating paper board 2 is vertically erected on an insulating pad 1 at the lower part of a transformer body, and is firmly bound on a stay at the outer circumference of a winding by a contraction band 3. The number of the insulating cushion blocks 1 at the lower part of the transformer body is six, so that the purpose of supporting the insulating paper boards 2 is achieved, and the size of the transformer body does not need to be increased.
The fixing mode is as follows: six insulating cushion blocks 1 are symmetrically distributed on four clamp upper limb plates 8 along the circumferential direction of a winding, limiting round steel 9 which is 15mm long and 10mm in diameter is welded on each clamp upper limb plate 8, and one surface of an insulating supporting plate 10, which is close to the limiting round steel 9 of the clamp upper limb plate 8, is provided with a first blind hole (the depth is 20mm and the diameter is 20 mm); four limiting threaded blind holes are symmetrically distributed on one surface, close to the laminated paperboard cushion blocks, of the insulating supporting plate 10 along the circumferential direction of the winding, one ends of four bakelite screws 11 are screwed into the four limiting threaded blind holes, the other ends of the four bakelite screws are arranged in two blind holes of the laminated paperboard cushion blocks 12 (the laminated paperboard cushion blocks 12 are multiple, the lower end faces of the four laminated paperboard cushion blocks 12 are provided with two blind holes), the number of the laminated paperboard cushion blocks 12 is determined by the inner diameter and the outer diameter of the winding, the length is determined by the radial direction of the winding, the number of the middle laminated paperboard cushion blocks 12 is 24, the thickness is 30mm, the width is 50 mm, all the laminated paperboard cushion blocks 12 are placed on the insulating supporting plate 10 and are uniformly distributed along the periphery of the insulating supporting plate 10, and the upper end faces of all the laminated paperboard cushion blocks 12 are bonded with the lower end faces of the first insulating paper rings 13. The upper end face of an insulating paper ring I13 is bonded on the insulating cushion block 1, a winding 7 is sleeved on the upper end face of the insulating cushion block 1, the winding 7 is formed by alternately winding an oil duct cushion block 5 and a wire cake 6, a groove is formed in the side wall of the oil duct cushion block 5, a stay 4 is arranged in the groove, the upper end and the lower end of an insulating paper plate 2 are firmly bound on the outer side of the stay 4 through a contraction band 3 and are located between the winding 7 and an on-load tap-changer 14, and the upper end of the winding 7 is firmly sleeved together by an insulating end ring I15, an insulating paper tube 16, an insulating paper ring II 17, an insulating end ring II 18, an insulating pressure plate 19, a press.
Claims (6)
1. The utility model provides an increase insulation system of insulating strength between transformer coil and on-load tap-changer which characterized in that: comprises an insulating cushion block (1), an insulating paper board (2), a contraction band (3), a stay (4), a winding (7), a clamp upper limb plate (8), limit round steel (9), an insulating supporting plate (10), a bakelite screw rod (11), a laminated paper board cushion block (12), an insulating paper ring I (13) and an on-load tap-changer (14), wherein the clamp upper limb plate (8) is welded on a lower clamp web plate (21), the insulating supporting plate (10), the laminated paper board cushion block (12), the insulating paper ring I (13) and the insulating cushion block (1) are sequentially arranged on the clamp upper limb plate (8) from bottom to top, the clamp upper limb plate (8) is provided with the limit round steel (9), the upper end surface and the lower end surface of the insulating supporting plate (10) are respectively provided with a threaded blind hole and a blind hole I, the lower end surface of the laminated paper board cushion block (12) is provided with a blind hole II corresponding to the threaded blind hole, the limit round steel (9) on the clamp upper limb plate (8) is arranged in, the laminated paperboard cushion block (12) is provided with a bakelite screw rod (11) between the second blind hole of the lower end face of the laminated paperboard cushion block (12) and the threaded blind hole of the upper end face of the insulating support plate (10), the upper end face of the laminated paperboard cushion block (12) is adhered to the lower end face of the first insulating paper ring (13), the lower end face of the insulating cushion block (1) is adhered to the upper end face of the first insulating paper ring (13), the bottom end of the winding (7) is arranged on the upper end face of the insulating cushion block (1), the outer diameter side of the winding (7) is provided with a stay (4), the insulating paperboard (2) is tightly tied outside the stay (4) through a contraction band (3) and is adjacent to an on-load.
2. The insulation structure for increasing the insulation strength between a transformer coil and an on-load tap-changer according to claim 1, wherein: the winding (7) is formed by alternately winding an oil duct cushion block (5) and a wire cake (6), and the stay (4) is arranged on a groove in the outer side wall of the oil duct cushion block (5).
3. The insulation structure for increasing the insulation strength between a transformer coil and an on-load tap-changer according to claim 1, wherein: the insulating cushion blocks (1) are multiple and are arranged in a radial mode along the circumferential direction of the winding (7).
4. An insulation structure for increasing the insulation strength between a transformer coil and an on-load tap-changer according to claim 1 or 3, wherein: the two lower clamping piece webs are respectively arranged on two sides of a lower iron yoke (22) of the transformer, the four clamping piece upper limb plates (8) are in a group, and the two groups of clamping piece upper limb plates (8) are respectively symmetrically arranged on the outer sides of the corresponding lower clamping piece webs.
5. An insulation structure for increasing the insulation strength between a transformer coil and an on-load tap-changer according to claim 1 or 3, wherein: the insulating paperboard (2) is arc-shaped.
6. An insulation structure for increasing the insulation strength between a transformer coil and an on-load tap-changer according to claim 1 or 3, wherein: the insulating supporting plate (10) is in a ring shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022557714.6U CN213211925U (en) | 2020-11-09 | 2020-11-09 | Insulation structure for increasing insulation strength between transformer coil and on-load tap-changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022557714.6U CN213211925U (en) | 2020-11-09 | 2020-11-09 | Insulation structure for increasing insulation strength between transformer coil and on-load tap-changer |
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| Publication Number | Publication Date |
|---|---|
| CN213211925U true CN213211925U (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022557714.6U Active CN213211925U (en) | 2020-11-09 | 2020-11-09 | Insulation structure for increasing insulation strength between transformer coil and on-load tap-changer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284722A (en) * | 2021-05-19 | 2021-08-20 | 云南电网有限责任公司电力科学研究院 | Supporting structure for improving radial short-circuit resistance of transformer |
| CN114242416A (en) * | 2021-12-27 | 2022-03-25 | 无锡普天铁心股份有限公司 | Welding structure for coil supporting plate of clamping piece of main transformer core |
-
2020
- 2020-11-09 CN CN202022557714.6U patent/CN213211925U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284722A (en) * | 2021-05-19 | 2021-08-20 | 云南电网有限责任公司电力科学研究院 | Supporting structure for improving radial short-circuit resistance of transformer |
| CN113284722B (en) * | 2021-05-19 | 2024-04-19 | 云南电网有限责任公司电力科学研究院 | Supporting structure for improving radial short-circuit resistance of transformer |
| CN114242416A (en) * | 2021-12-27 | 2022-03-25 | 无锡普天铁心股份有限公司 | Welding structure for coil supporting plate of clamping piece of main transformer core |
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