CN217008898U - SF6 gas current transformer - Google Patents
SF6 gas current transformer Download PDFInfo
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- CN217008898U CN217008898U CN202220683006.3U CN202220683006U CN217008898U CN 217008898 U CN217008898 U CN 217008898U CN 202220683006 U CN202220683006 U CN 202220683006U CN 217008898 U CN217008898 U CN 217008898U
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- porcelain bushing
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Abstract
The utility model relates to an SF6 gas current transformer, which belongs to the technical field of transformers and comprises a base, a secondary junction box, a shell and a primary conductor, wherein a shielding cylinder is arranged in the shell, a secondary coil is wound in the shielding cylinder, the primary conductor penetrates through a through hole of the shielding cylinder, the primary conductor is wound with the primary coil, a secondary lead shielding pipe is connected between the base and the shielding cylinder, a porcelain sleeve is sleeved outside the secondary lead shielding pipe, and the secondary junction box is arranged at the lower end of the base. Compared with the structure of the original basin-type insulator supporting coil, the structure of the utility model utilizes the secondary lead shielding tube to directly bear the weight of the secondary coil, avoids the risk of breakage of the basin-type insulator, can bear heavier weight than the original basin-type insulator, is more reliable, can effectively improve the problem of large internal local discharge of a product, reduces the cost and simultaneously improves the product quality problem.
Description
Technical Field
The utility model relates to an SF6 gas current transformer, and belongs to the technical field of transformers.
Background
The SF6 gas current transformer is a novel current transformer appearing in recent years, and because SF6 gas is high in electric strength, strong in arc extinguishing capability and good in chemical stability, the SF6 gas is used as an insulating medium in the current transformer, and compared with an oil immersed current transformer, the SF6 current transformer adopts a full-sealing structure, is used outdoors, and has the advantages of high dynamic thermal stability, high precision, pollution prevention, flame retardance, safety, reliability, convenience in maintenance and the like.
At present, in an existing SF6 gas current transformer in the market, a secondary coil in a product is supported by a basin-type insulator structure, and the basin-type insulator is molded by epoxy resin in a casting mode. This structure has the following drawbacks:
(1) basin formula insulator supports secondary coil, if coil weight is heavier, and in the product transportation, the load that basin formula insulator bore is great, and there is cracked risk in basin formula insulator, causes the product to damage.
(2) The basin type insulator is molded by casting epoxy resin and is applied to the interior of an SF6 current transformer product, the partial discharge quantity required by the product is small, so that the performance requirement on the basin type insulator is high, and the partial discharge of bubbles, impurities, external tips and the like in the basin type insulator can influence the product.
(3) Because basin type insulator performance requirement is higher, and the cost is higher, for reduce cost and improve product quality urgent need seek the mode of replacing basin type insulator structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides the SF6 gas current transformer with a basin-type insulator omitted.
The utility model is realized by the following technical scheme:
the SF6 gas current transformer comprises a base, a secondary junction box, a shell and a primary conductor, wherein a shielding cylinder is arranged in the shell, a secondary coil is wound in the shielding cylinder, the primary conductor penetrates through a through hole of the shielding cylinder and is wound with the primary coil, a secondary lead shielding pipe is connected between the base and the shielding cylinder, a porcelain sleeve is sleeved outside the secondary lead shielding pipe, and the secondary junction box is installed at the lower end of the base.
Compared with the structure of the original basin-type insulator supporting coil, the structure of the utility model utilizes the secondary lead shielding tube to directly bear the weight of the secondary coil, avoids the risk of breakage of the basin-type insulator, can bear heavier weight than the original basin-type insulator, is more reliable, can effectively improve the problem of large internal local discharge of a product, reduces the cost and simultaneously improves the product quality problem.
The utility model is further improved in that first flange plates are arranged at two ends of the shell, a second flange plate is respectively arranged at two ends of the primary conductor, and the second flange plate is tightly attached to the outer side surface of the first flange plate and is connected with the first flange plate through a bolt connecting piece. By adopting the structural design, the primary conductor is more convenient to disassemble and assemble.
The utility model is further improved in that the lower end of the shielding cylinder is provided with a flange bulge, the lower end of the secondary lead shielding pipe is provided with a lower connecting flange, the upper end of the secondary lead shielding pipe is provided with an upper connecting flange, the lower connecting flange is connected to the base, and the upper connecting flange is connected with the flange bulge. By adopting the structural design, the secondary lead shielding tube is more convenient to disassemble and assemble.
The utility model is further improved in that an upper porcelain bushing flange is sleeved at the upper end of the porcelain bushing, a lower porcelain bushing flange is sleeved at the lower end of the porcelain bushing, the upper porcelain bushing flange is connected with a flange seat arranged at the lower end of the shell, and the lower porcelain bushing flange is connected to the base. And the porcelain bushing flange is adopted to support and fix the porcelain bushing, so that the porcelain bushing has better stability.
In addition, the upper porcelain bushing flange and the lower porcelain bushing flange are both made of a steel plate Q235A and are subjected to electrogalvanizing treatment.
In a further improvement of the utility model, the secondary lead shielding tube is made of Q345A steel tube with the diameter of 80 multiplied by 10.
Compared with the prior art, the utility model has the beneficial effects that:
compared with the structure of the original basin-type insulator supporting coil, the structure of the utility model utilizes the secondary lead shielding tube to directly bear the weight of the secondary coil, avoids the risk of breakage of the basin-type insulator, can bear heavier weight than the original basin-type insulator, is more reliable, can effectively improve the problem of large internal local discharge of a product, reduces the cost and simultaneously improves the product quality problem.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of the exploded structure of fig. 1.
Fig. 3 is a schematic structural diagram of a shielding cylinder according to an embodiment of the present invention.
Fig. 4 is a schematic cross-sectional structure diagram of a shielding cylinder according to an embodiment of the present invention.
In the figure: 1. a base; 2. a secondary junction box; 3. a lower porcelain bushing flange; 4. mounting a porcelain bushing flange; 5. a porcelain bushing; 6. a housing; 7. a primary conductor; 8. a secondary lead shielding tube; 9. a lower connecting flange; 10. an upper connecting flange; 11. the flange is raised; 12. a flange seat; 13. a first flange plate; 14. a second flange plate; 15. and a shielding cylinder.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
An SF6 gas current transformer as shown in fig. 1-4, including base 1, secondary terminal box 2, casing 6, primary conductor 7, be equipped with a shielding section of thick bamboo 15 in the casing 6, the coiling has secondary coil in the shielding section of thick bamboo 15, primary conductor 7 runs through the through-hole setting of shielding section of thick bamboo 15, the coiling has primary coil on the primary conductor 7, be connected with secondary lead wire shielding tube 8 between base 1 and the shielding section of thick bamboo 15, secondary lead wire shielding tube 8 overcoat has insulator 5, secondary terminal box 2 installs at base 1 lower extreme.
Wherein, the two ends of the shell 6 are provided with a first flange 13, the two ends of the primary conductor 7 are respectively provided with a second flange 14, and the second flanges 14 are clung to the outer side surface of the first flange 13 and connected with the first flange 13 by a bolt connecting piece;
the lower end of the shielding cylinder 15 is provided with a flange bulge 11, the lower end of the secondary lead shielding pipe 8 is provided with a lower connecting flange 9, the upper end of the secondary lead shielding pipe 8 is provided with an upper connecting flange 10, the lower connecting flange 9 is connected on the base 1, the upper connecting flange 10 is connected with the flange bulge 11, and the secondary lead shielding pipe 8 is made of phi 80 multiplied by 10Q 345A steel pipe
The upper end cover of 5 pot insulators is equipped with porcelain bushing flange 4, and pot insulators flange 3 down is equipped with to 5 pot insulators, goes up the flange seat 12 that porcelain bushing flange 4 and 6 lower extremes of casing were equipped with and links to each other, and lower porcelain bushing flange 3 is connected on base 1, goes up porcelain bushing flange 4, porcelain bushing flange 3 down and all adopts steel sheet Q235A to make to through electrogalvanizing.
The working principle is as follows:
compared with the structure of the original basin-type insulator supporting coil, the structure of the utility model utilizes the secondary lead shielding tube to directly bear the weight of the secondary coil, avoids the risk of breakage of the basin-type insulator, can bear heavier weight than the original basin-type insulator, is more reliable, can effectively improve the problem of large internal local discharge of a product, reduces the cost and simultaneously improves the product quality problem.
Flanges are adopted to be detachably connected between the primary conductor and the shell, between the porcelain sleeve flange and the base and between the secondary lead shielding tube and the shielding cylinder and between the secondary lead shielding tube and the base, the connecting structure is stable, and the dismounting and the mounting are convenient.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "upper", "lower", "outside", "inside" and the like in the description and claims of the present invention and the above drawings are used for distinguishing relative positions if any, and are not necessarily given qualitatively. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides a SF6 gaseous current transformer, includes base (1), secondary terminal box (2), casing (6), primary conductor (7), its characterized in that, be equipped with shielding section of thick bamboo (15) in casing (6), the coiling has secondary coil in shielding section of thick bamboo (15), and the through-hole setting of shielding section of thick bamboo (15) is run through in primary conductor (7), and the coiling has primary coil on primary conductor (7), is connected with secondary lead wire shielding tube (8) between base (1) and shielding section of thick bamboo (15), and secondary lead wire shielding tube (8) overcoat has insulator (5), and secondary terminal box (2) are installed at base (1) lower extreme.
2. An SF6 gas current transformer according to claim 1, wherein the first flange (13) is mounted at both ends of the housing (6), the second flange (14) is respectively provided at both ends of the primary conductor (7), and the second flange (14) is closely attached to the outer side surface of the first flange (13) and connected thereto by a bolt connection.
3. The SF6 gas current transformer as claimed in claim 1, wherein a flange protrusion (11) is formed at a lower end of the shielding cylinder (15), a lower connecting flange (9) is formed at a lower end of the secondary lead shielding tube (8), an upper connecting flange (10) is formed at an upper end of the secondary lead shielding tube (8), the lower connecting flange (9) is connected to the base (1), and the upper connecting flange (10) is connected to the flange protrusion (11).
4. SF6 gas current transformer as claimed in claim 1, wherein the upper end of the porcelain bushing (5) is sleeved with an upper porcelain bushing flange (4), the lower end of the porcelain bushing (5) is sleeved with a lower porcelain bushing flange (3), the upper porcelain bushing flange (4) is connected with a flange seat (12) provided at the lower end of the shell (6), and the lower porcelain bushing flange (3) is connected with the base (1).
5. The SF6 gas current transformer of claim 4, wherein the upper and lower porcelain bushing flanges (4, 3) are made of steel plate Q235A and are electro-galvanized.
6. An SF6 gas current transformer according to claim 1, wherein the secondary lead shielding tube (8) is made of phi 80 x 10Q 345A steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220683006.3U CN217008898U (en) | 2022-03-25 | 2022-03-25 | SF6 gas current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220683006.3U CN217008898U (en) | 2022-03-25 | 2022-03-25 | SF6 gas current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217008898U true CN217008898U (en) | 2022-07-19 |
Family
ID=82372967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220683006.3U Active CN217008898U (en) | 2022-03-25 | 2022-03-25 | SF6 gas current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217008898U (en) |
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2022
- 2022-03-25 CN CN202220683006.3U patent/CN217008898U/en active Active
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