CN212587333U - Body structure of single-phase direct-buried dry-type transformer - Google Patents
Body structure of single-phase direct-buried dry-type transformer Download PDFInfo
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- CN212587333U CN212587333U CN202021452530.7U CN202021452530U CN212587333U CN 212587333 U CN212587333 U CN 212587333U CN 202021452530 U CN202021452530 U CN 202021452530U CN 212587333 U CN212587333 U CN 212587333U
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Abstract
The utility model discloses a ware body structure of single-phase direct-buried dry-type transformer, which belongs to the technical field of transformers and comprises an iron core, wherein one opposite side of the iron core is respectively sleeved with a low-voltage winding, the outer side of the low-voltage winding is provided with a high-voltage winding, and the high-voltage winding and the low-voltage winding are integrally molded by casting epoxy resin; a shielding layer and a high-voltage outlet pile head are arranged on the outer side of the high-voltage winding; and a high-voltage outgoing line shielding layer is arranged on the outer side of the high-voltage outgoing line pile head. High-voltage winding and low-voltage winding pour the shaping through the integrative vacuum of epoxy, it establishes on the iron core to form a whole cover, between high-voltage winding and low-voltage winding, and form the resin layer between high-voltage winding and the shielding layer, replace air and transformer oil through the resin layer, reliable insulating nature has, small in size, and through shielding and the protection of shielding layer and the high-pressure shielding layer of being qualified for the next round of competitions, can avoid partial discharge, good waterproof seal has, anticorrosive rust-resistant and heat dispersion, can be applicable to the underground environment in a flexible way, and the practicality is good.
Description
Technical Field
The utility model belongs to the technical field of the transformer, specifically speaking is a ware body structure of single-phase direct-burried dry-type transformer.
Background
In the conventional power supply, several traditional power supply schemes cannot meet the requirement of outdoor all-weather uninterrupted operation at present, great trouble is brought to power supply and city management, and the main application types are as follows: traditional box-room substations and buried transformers. For a traditional box-type transformer substation, the heat dissipation performance is poor, the occupied area is large, the appearance is not uniform, and the box-type transformer substation cannot enter a beautiful urban environment; and buried transformer is mostly oil-immersed transformer, but oil-immersed transformer exists to maintain that the work load is big, easily corroded, rusts easily, and is higher to the environmental requirement, and traditional buried oil-immersed transformer is bulky, is unfavorable for buried transformer's placing in the greenbelt.
SUMMERY OF THE UTILITY MODEL
For solving box-type substation heat dispersion now not good, area is big, the outward appearance is non-uniform, seems the check not to go with graceful urban environment, and buried transformer mostly is oil-immersed transformer, and is bulky, maintenance work load is big, requires highly to the environment, is unfavorable for the problem of placing in the greenbelt, the utility model provides a single-phase direct-burried dry-type transformer's ware body structure.
The utility model discloses a realize through following technical scheme.
The transformer body structure of the single-phase direct-buried dry-type transformer comprises an iron core, wherein a low-voltage winding is sleeved on one side of the iron core, a high-voltage winding is arranged on the outer side of the low-voltage winding, and the high-voltage winding and the low-voltage winding are integrally molded by casting epoxy resin; a shielding layer and a high-voltage outlet pile head are arranged on the outer side of the high-voltage winding; and a high-voltage outgoing line shielding layer is arranged on the outer side of the high-voltage outgoing line pile head.
The utility model is further improved in that two ends of the low-voltage winding are respectively connected with an incoming line copper bar and an outgoing line copper bar; the incoming line copper bar is arranged on the inner side of the low-voltage winding, and the section of the incoming line copper bar is rectangular; the outgoing copper bar is arranged on the outer side of the low-voltage winding, and the outer side face of the outgoing copper bar is arc-shaped.
The utility model discloses a further improvement still, above-mentioned high pressure outlet pile head sets up in the upper portion and the lower part in the high voltage winding outside to be connected with high voltage winding's both ends respectively.
The utility model discloses a further improvement still, above-mentioned high pressure outlet pile head seamless connection has the cable plug head.
The utility model discloses a further improvement still, above-mentioned shielding layer and high pressure are qualified for the next round of competitions the shielding layer and all include the semiconductor layer of inboard and the copper mesh layer in the outside.
The utility model discloses a further improvement still, above-mentioned semiconductor layer forms for the coiling of semiconductor paper.
The utility model discloses a further improvement still, above-mentioned shielding layer and high pressure are qualified for the next round of competitions the shielding layer and adopt a little ground connection form.
According to the technical scheme provided by the utility model, the beneficial effects are that: 1. high-voltage winding and low-voltage winding pour the shaping through the integrative vacuum of epoxy, form a whole, and the cover is established on the iron core, between high-voltage winding and low-voltage winding, and form the resin layer between high-voltage winding and the shielding layer, replace air insulation and transformer oil insulation through the resin layer, reliable insulating nature has, its volume reduces greatly, and through shielding and protection of shielding layer and high-voltage outgoing line shielding layer, can avoid partial discharge, and have good sealed and heat dispersion, can nimble be applied to underground installation, little by environmental impact, the practicality is good, wide development prospect has. 2. The incoming line copper bar and the outgoing line copper bar are reasonable in structural arrangement, stable and firm in connection and fixation, the outer side of the outgoing line copper bar is in an arc shape and perfectly matched with the annular resin layer on the outer side, and the local structure on the inner surface of the resin layer is prevented from being damaged. 3. The high-voltage wire outlet pile head forms a wire outlet structure of the high-voltage winding, and the high-voltage wire outlet pile head is simple in structure and reasonable in design. 4. The high-voltage outlet pile head is output outwards through the seamless connection cable plug head, and connection tightness and safety are guaranteed. 5. The equipotential is formed by the copper mesh layer, so that the cracking phenomenon caused by the infirm curing between the copper mesh layer and the resin layer can be prevented, the electric field can be further uniform by the semiconductor layer, the generation of partial discharge is avoided, the safety is good, and the reliability is high. 6. The semiconductor layer is formed by winding the semiconductor paper, so that a good uniform electric field effect is ensured, the raw material is low in manufacturing cost and easy to obtain, and the winding is simple and convenient. 7. One point is grounded and only has one grounding reference point, so that the potential height of the whole system is consistent, the structure is simple, and the safety is good.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced below, 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 according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of a top-view cross-sectional structure of a high-voltage winding according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a high-voltage outlet pile head according to an embodiment of the present invention.
In the drawings: 1. the high-voltage wire-outgoing type transformer comprises an iron core, 2 parts of a high-voltage winding, 201 parts of a shielding layer, 20101 parts of a semiconductor layer, 20102 parts of a copper net layer, 202 parts of a high-voltage wire-outgoing pile head, 20201 parts of a high-voltage wire-outgoing shielding layer, 3 parts of a low-voltage winding, 301 parts of a wire-incoming copper bar, 302 parts of a wire-outgoing copper bar, 4 parts of a resin layer, 5 parts of a cable plug.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. 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 scope of protection of this patent.
As shown in the attached drawings, the body structure of the single-phase direct-buried dry-type transformer comprises an iron core 1 with a rectangular frame structure and a circular cross section, wherein a low-voltage winding 3 is sleeved on one side of the iron core 1, a high-voltage winding 2 is arranged on the outer side of the low-voltage winding 3, the high-voltage winding 2 and the low-voltage winding 3 are integrally wound and are formed by epoxy resin vacuum pouring; after casting, resin layers 4 are respectively formed between the low-voltage winding 3 and the high-voltage winding 2 and outside the high-voltage winding 2, and the resin layers 4 are internally provided with latticed glass fibers impregnated with resin. The latticed glass fiber is used as a supporting framework of the resin layer 4, and the resin layer 4 is made of F-level epoxy resin, so that good structural performance and insulation performance are guaranteed. A shielding layer 201 and a high-voltage outlet pile head 202 are arranged on the outer side of the high-voltage winding 2; and a high-voltage outgoing line shielding layer 20201 is arranged on the outer side of the high-voltage outgoing line pile head 202.
The high-voltage winding 2 and the low-voltage winding 3 are integrally formed by vacuum casting through epoxy resin to form a whole, the whole is sleeved on the iron core 1, resin layers 4 are respectively formed between the high-voltage winding 2 and the low-voltage winding 3 and between the high-voltage winding 2 and the shielding layer 201, the resin layers 4 replace air insulation and transformer oil insulation, the insulation structure has reliable insulation and greatly reduced volume, the local discharge of the low-voltage winding 3, the high-voltage winding 2 and the high-voltage outgoing line pile head 202 can be avoided through shielding and protection of the shielding layer 201 and the high-voltage outgoing line shielding layer 20201, the insulation structure has good sealing waterproof performance, corrosion-proof performance and heat-dissipation performance, can be flexibly applied to underground installation, is generally installed in an access hole or a small pit of a trench, is not influenced by sunshine and is slightly influenced by climate and environment, and is matched with a cable to form an underground power grid, so that the insulation structure, good practicability and wide development prospect.
Furthermore, two ends of the low-voltage winding 3 are respectively connected with an incoming line copper bar 301 and an outgoing line copper bar 302; the incoming line copper bar 301 is arranged on the inner side of the low-voltage winding 3, and the cross section of the incoming line copper bar is rectangular; the outgoing copper bar 302 is arranged on the outer side of the low-voltage winding 3, and the outer side surface of the outgoing copper bar is in an arc shape; the incoming line copper bar 301 and the outgoing line copper bar 302 extend outwards along the axial direction of the low-voltage winding 3, and the extending directions are opposite. The incoming copper bar 301 and the outgoing copper bar 302 are reasonable in structural arrangement, stable and firm in connection and fixation, the outer side surface of the outgoing copper bar 302 is arc-shaped and perfectly matched with the outer annular resin layer 4, damage to the local structure of the inner surface of the resin layer 4 is prevented, and use safety and reliability are guaranteed; the interference of the outward extending structures of the incoming line copper bar 301 and the outgoing line copper bar 302 can be completely avoided, and the convenience and the safety of the external cable are guaranteed. In use, the two low voltage windings 3 are connected in parallel by a cable.
Further, the high-voltage outlet pile heads 202 are arranged at the upper part and the lower part of the outer side of the high-voltage winding 2 and are respectively connected with two ends of the high-voltage winding 2. The high-voltage wire outlet pile head forms a wire outlet structure of the high-voltage winding, and the high-voltage wire outlet pile head is simple in structure, reasonable in arrangement and convenient for wire outlet connection. When the transformer is used, the two high-voltage windings 2 are connected in series through the cable, and stable and reliable transformation is realized.
Further, the high-voltage outlet pile head 202 is seamlessly inserted with a cable plug head 5. The high-voltage outlet pile head 202 is output outwards through the seamless connection cable plug head 5, and connection tightness and safety are guaranteed.
Further, the shielding layer 201 and the high-voltage outgoing line shielding layer 20201 both include an inner semiconductor layer 20101 and an outer copper mesh layer 20102, the mesh number of the copper mesh layer 20102 is preferably 400 meshes, and the semiconductor layer 20101 is formed by winding semiconductor paper. The equipotential is formed through the copper mesh layer 20102, the cracking phenomenon caused by the fact that curing is not firm between the copper mesh layer and the resin layer 4 can be prevented, the semiconductor layer 20101 can further homogenize an electric field, partial discharge is avoided, safety is good, reliability is high, reliable protection performance is guaranteed, the semiconductor layer 20101 is wound through semiconductor paper, winding is simple, and implementation is easy.
Further, after the shielding layer 201 and the high-voltage outgoing line shielding layer 20201 are connected, a one-point grounding mode is adopted together. One point is grounded and only has one grounding reference point, so that the potential height of the whole system is consistent, the structure is simple, and the safety is good.
This ware body structure of single-phase direct-burried dry-type transformer, high-voltage winding and low-voltage winding pour the shaping through the integrative vacuum of epoxy, form a whole, and the cover is established on the iron core, between high-voltage winding and low-voltage winding, and form the resin layer between high-voltage winding and the shielding layer, replace air insulation and transformer oil insulation through the resin layer, reliable insulating nature has, its volume reduces greatly, and through shielding and protection of shielding layer and high-pressure outgoing line shielding layer, can avoid partial discharge, and have good waterproof sealing performance, anticorrosive antirust property and heat dispersion, can be nimble be applied to underground installation, little by environmental impact, the practicality is good, wide development prospect has. The wire outlet structure is simple, the design is reasonable, the generation of partial discharge can be avoided integrally, the use safety is good, and the reliability is high.
The embodiments in the present description 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 relationships in 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 invention described herein are capable of operation in sequences other than those illustrated or otherwise 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 invention. 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 (7)
1. The body structure of the single-phase direct-buried dry-type transformer is characterized by comprising an iron core (1), wherein a low-voltage winding (3) is sleeved on one opposite side of the iron core (1) respectively, a high-voltage winding (2) is arranged on the outer side of the low-voltage winding (3), and the high-voltage winding (2) and the low-voltage winding (3) are integrally molded by casting epoxy resin; a shielding layer (201) and a high-voltage outlet pile head (202) are arranged on the outer side of the high-voltage winding (2); and a high-voltage outgoing line shielding layer (20201) is arranged on the outer side of the high-voltage outgoing line pile head (202).
2. The body structure of the single-phase direct-buried dry-type transformer according to claim 1, wherein both ends of the low-voltage winding (3) are connected with an incoming line copper bar (301) and an outgoing line copper bar (302), respectively; the incoming line copper bar (301) is arranged on the inner side of the low-voltage winding (3), and the section of the incoming line copper bar is rectangular; the outgoing copper bar (302) is arranged on the outer side of the low-voltage winding (3), and the outer side surface of the outgoing copper bar is arc-shaped.
3. The body structure of the single-phase direct-buried dry-type transformer according to claim 1, wherein the high-voltage outlet stub (202) is disposed at an upper portion and a lower portion of an outer side of the high-voltage winding (2) and connected to both ends of the high-voltage winding (2), respectively.
4. The body structure of the single-phase direct-buried dry-type transformer according to claim 1 or 3, wherein the high-voltage outlet pile head (202) is seamlessly connected with a cable plug head (5).
5. The body structure of a single-phase direct-buried dry-type transformer according to claim 1, wherein the shield layer (201) and the high-voltage outlet wire shield layer (20201) each comprise an inner semiconductor layer (20101) and an outer copper mesh layer (20102).
6. The body structure of the single-phase direct-buried dry-type transformer of claim 5, wherein the semiconductor layer (20101) is made of a wound semiconductor paper.
7. The body structure of a single-phase direct-buried dry-type transformer according to claim 1 or 5, wherein the shielding layer (201) and the high-voltage outlet wire shielding layer (20201) are in the form of one-point grounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021452530.7U CN212587333U (en) | 2020-07-21 | 2020-07-21 | Body structure of single-phase direct-buried dry-type transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021452530.7U CN212587333U (en) | 2020-07-21 | 2020-07-21 | Body structure of single-phase direct-buried dry-type transformer |
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| CN212587333U true CN212587333U (en) | 2021-02-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690036A (en) * | 2021-08-20 | 2021-11-23 | 青岛鼎信通讯股份有限公司 | Three-winding high-voltage high-frequency transformer applied to energy router |
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2020
- 2020-07-21 CN CN202021452530.7U patent/CN212587333U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690036A (en) * | 2021-08-20 | 2021-11-23 | 青岛鼎信通讯股份有限公司 | Three-winding high-voltage high-frequency transformer applied to energy router |
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