CN217386884U - 35kV transformer body insulation structure and 35kV transformer - Google Patents
35kV transformer body insulation structure and 35kV transformer Download PDFInfo
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- CN217386884U CN217386884U CN202221473033.4U CN202221473033U CN217386884U CN 217386884 U CN217386884 U CN 217386884U CN 202221473033 U CN202221473033 U CN 202221473033U CN 217386884 U CN217386884 U CN 217386884U
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Abstract
The utility model discloses a 35kV transformer body insulation structure and a 35kV transformer; the transformer body insulation structure comprises an iron core, a low-voltage coil and a high-voltage coil split into an upper high-voltage coil and a lower high-voltage coil along the axial direction; the leading-out wire at the head end of the high-voltage coil is led out from the middle part of the high-voltage coil to the outer side surface of the high-voltage coil, and the leading-out wire at the tail end of the high-voltage coil is led out from the middle part of the lower high-voltage coil to the outer side surface of the high-voltage coil; the upper high-voltage coil tapping outgoing line is led out from the inside of the upper high-voltage coil to the upper end of the upper high-voltage coil, and the lower high-voltage coil tapping outgoing line is led out from the inside of the lower high-voltage coil to the lower end of the lower high-voltage coil; and insulating paper is arranged between the low-voltage coil and the high-voltage coil, a group of insulating supporting strips are arranged on the insulating paper at intervals, and an oil passage is formed between every two adjacent insulating supporting strips. According to the insulation structure of the transformer body, the head end outgoing line and the tail end outgoing line of the high-voltage coil are arranged in the middle of the high-voltage coil, the high-voltage coil tapping outgoing line is arranged inside the high-voltage coil, and insulation paper and insulation supporting strips are used as main insulation, so that the insulation structure is simple, and the heat dissipation effect is good.
Description
Technical Field
The utility model relates to a transformer technical field, concretely relates to 35kV transformer ware body insulation system and 35kV transformer.
Background
The oil immersed transformer is a distribution transformer with iron cores and coils immersed in transformer oil, and is one of important devices in power supply and distribution systems of industrial and mining enterprises and civil buildings. Along with the implementation of national energy-saving and environment-friendly policies, users are more and more favored about energy-saving and environment-friendly transformers; the 35kV oil immersed transformer is small in capacity and low in loss, and the market consumption is larger and larger.
At present, in order to reduce the electric field intensity of the 35kV oil-immersed transformer from the high voltage to the low voltage, the existing technical scheme is as follows: the creepage distance between the high voltage and the low voltage and between the high voltage and the iron yoke is designed to be more than 65mm, the distance between the high voltage coil and the iron yoke is designed to be more than 50mm, the insulation distance is increased between the high voltage coil and the low voltage coil, and the distance is more than 15 mm. In order to ensure the electrical performance of the product, an angle ring (as shown in fig. 1) is usually disposed between the high-voltage coil and the low-voltage coil, and the production process is as follows: after the low-voltage coil is wound, insulating and angle rings with the heat dissipation function are placed, and then the high-voltage coil is wound (the angle rings can be divided into once-formed hard angle rings and corrugated paper outwards-turned soft angle rings, the soft angle rings are directly placed in the winding process, and the hard angle rings are placed after the coil is wound). However, the installation of the angle ring between the high-voltage coil and the low-voltage coil has the defects of difficult operation process and higher manufacturing cost; moreover, after the angle ring is arranged, the end part of the high-voltage coil can be shielded by the angle ring, so that the heat dissipation of the high-voltage coil is not facilitated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a 35kV transformer ware body insulation system for overcome the above-mentioned problem that exists among the prior art. The utility model discloses a 35kV transformer ware body insulation system sets up high voltage coil's head end lead-out wire and terminal lead-out wire in high voltage coil's middle part, set up high voltage coil shunting lead-out wire in high voltage coil's inside, cancelled simultaneously high, play insulating effect's big angle ring between the low voltage coil, and adopt insulating paper and insulating stay as main insulation, the insulating preparation degree of difficulty between high, the low voltage coil has been reduced, and high, be formed with the heat dissipation oil duct between the low voltage coil, thereby the inside heat dissipation of coil has been improved, the radiating effect is good. Correspondingly, the utility model discloses still provide and be equipped with this ware body insulation system's 35kV transformer.
To insulation system, the technical scheme of the utility model is: the 35kV transformer body insulation structure comprises an iron core, a low-voltage coil and a high-voltage coil; the high-voltage coil is axially split into an upper high-voltage coil and a lower high-voltage coil which are symmetrically distributed; a leading-out wire at the head end of the high-voltage coil is led out from the middle part of the high-voltage coil to the outer side surface of the high-voltage coil; the tail end outgoing line of the high-voltage coil is led out from the middle part of the lower high-voltage coil to the outer side surface of the lower high-voltage coil; the tapping lead wire of the upper high voltage coil is led out from the inside of the upper high voltage coil to the upper end of the upper high voltage coil; the tapping outgoing line of the lower high-voltage coil is led out from the inside of the lower high-voltage coil to the lower end of the lower high-voltage coil; a stay curtain is arranged between the low-voltage coil and the high-voltage coil; the stay curtains comprise insulating paper, and a group of first insulating stays are arranged on the insulating paper at intervals along the circumferential direction, so that a plurality of oil passages are formed between the low-voltage coil and the high-voltage coil.
Compared with the prior art, the insulation structure of the 35kV transformer body of the utility model has the advantages that the head end outgoing line and the tail end outgoing line of the high-voltage coil are arranged in the middle of the high-voltage coil, the tapping outgoing line of the high-voltage coil is arranged in the high-voltage coil, and meanwhile, a large-angle ring playing an insulation role between the high-voltage coil and the low-voltage coil is cancelled, so that the distance between the high-voltage coil and the low-voltage coil is reduced, the insulation distance is more compact, the size of the transformer is reduced, and the manufacturing cost is reduced; in addition, the stay curtain formed by the insulating paper and the insulating stays is adopted between the high-voltage coil and the low-voltage coil as main insulation, the insulating structure is simplified, the assembly is convenient, the insulating manufacturing difficulty between the high-voltage coil and the low-voltage coil is reduced, the manufacturing efficiency of the coil is improved, a heat dissipation oil duct is formed between the high-voltage coil and the low-voltage coil, and the end part of the high-voltage coil is not shielded by an angle ring, so that the heat dissipation inside the coil is improved, and the heat dissipation effect is good.
Preferably, in the insulation structure of the body of the 35kV transformer, the first insulation stay is formed by hot press molding of a paperboard. Therefore, the stress strength of the oil duct can be enhanced, the oil duct is prevented from being deformed, and the oil duct is ensured to be smooth in circulation, so that the heat dissipation effect of the coil is ensured, and the transformer can be safely operated.
Preferably, in the insulation structure of the 35kV transformer body, two ends of the low-voltage coil and the high-voltage coil are respectively provided with a paperboard ring. Further, a paper board cushion block is arranged between the paper board ring and the iron yoke. Therefore, creepage distances between the high-voltage coil and the iron yoke and between the low-voltage coil and the iron yoke can be increased, and the electrical insulation performance of the transformer is ensured; and the paperboard coil and the paperboard cushion block are arranged to form an insulation structure between the high-low voltage coil and the iron yoke, so that the transformer body is convenient to mount and easy to implement, the assembly process of the transformer body can be simplified, the total assembly time is reduced, and the production and manufacturing efficiency of the transformer is improved.
Preferably, in the insulation structure of the body of the 35kV transformer, a group of second insulation stays is arranged between the low-voltage coil and the iron core at intervals. Therefore, after the high-low voltage coil is sleeved, the high-low voltage coil can be tightly supported through the second insulating supporting strip, the short-circuit resistance of the high-low voltage coil is improved, meanwhile, the anti-vibration requirement of the transformer body can be improved, and the transformer can be used in severe places.
Preferably, in the insulation structure of the 35kV transformer body, an insulation pad is arranged between the upper high-voltage coil and the lower high-voltage coil. Further, the total height of the upper high voltage coil and the lower high voltage coil is equivalent to the height of the low voltage coil. Therefore, the insulating cushion block is convenient to compress and fasten, and the inter-section insulating property of the high-voltage coil is ensured.
To the transformer, the technical scheme of the utility model is that: 35kV transformer, including aforementioned the utility model provides a 35kV transformer ware body insulation system.
The utility model discloses a 35kV transformer body insulation structure adopts the supporting curtain formed by the insulation paper and the insulation stay as the main insulation; compared with the traditional large-angle ring which plays an insulating role and is arranged between the high-voltage coil and the low-voltage coil, the large-angle ring simplifies an insulating structure and is more convenient to assemble, so that the difficulty in insulating and manufacturing the high-voltage coil and the low-voltage coil is reduced, the manufacturing efficiency of the coils is improved, the distance between the high-voltage coil and the low-voltage coil is reduced, the insulating distance is more compact, the size of a transformer is reduced, and the manufacturing cost is reduced; and the end part of the high-voltage coil is not shielded by an angle ring, so that the heat dissipation effect in the coil is better.
Drawings
Fig. 1 is a schematic diagram of a body insulation structure of a 35KV transformer in the prior art;
fig. 2 is a schematic view of the insulation structure of the body of the 35KV transformer in the present application;
fig. 3 is a top view of the insulating structure of the body of the 35KV transformer in the present application;
fig. 4 is a schematic diagram of an insulation structure of a body of a 35KV transformer in the embodiment of the present application.
The labels in the figures are: 1-an iron core; 2-a low-voltage coil, a-a leading-out wire at the head end of the low-voltage coil, and an x-leading-out wire at the tail end of the low-voltage coil; 3-high-voltage coil, 301-upper high-voltage coil, 302-lower high-voltage coil, A-high-voltage coil head end outgoing line, X-high-voltage coil tail end outgoing line, X2, X4, X6-upper high-voltage coil tapping outgoing line, X3, X5, X7-upper high-voltage coil tapping outgoing line; 4-insulating paper; 5-a first insulating stay; 6-oil duct; 7-cardboard ring; 8-paperboard cushion blocks; 9-a second insulating stay; 10-insulating spacer block.
Detailed Description
The following further describes the present application with reference to the drawings and examples, but the present application is not limited thereto.
Referring to fig. 2 to 4, the 35kV transformer body insulation structure of the present application includes an iron core 1, a low voltage coil 2 and a high voltage coil 3; the low-voltage coil 2 and the high-voltage coil 3 are sleeved on the iron core 1, and the high-voltage coil 3 is wound on the outer side of the low-voltage coil 2; the high-voltage coil 3 is axially split into an upper high-voltage coil 301 and a lower high-voltage coil 302 which are symmetrically distributed; a leading-out wire a at the head end of the low-voltage coil 2 and a leading-out wire x at the tail end of the low-voltage coil are both led out from the interior of the low-voltage coil to the upper end of the low-voltage coil (namely, the upper end of the low-voltage coil 2 is provided with two leading-out heads a and x); a leading-out wire A at the head end of the high-voltage coil is led out from the middle part of the high-voltage coil 301 to the outer side surface of the high-voltage coil; the tail end outgoing line X of the high-voltage coil is led out from the middle part of the lower high-voltage coil 302 to the outer side surface of the lower high-voltage coil; the upper high voltage coil tapping lead-out wires X2, X4 and X6 are led out from the inside of the upper high voltage coil 301 to the upper end thereof; the lower high-voltage coil tapping lead-out wires X3, X5 and X7 are led out from the inside of the lower high-voltage coil 302 to the lower end thereof (namely, the upper end of the upper high-voltage coil 301 is provided with three lead-out heads X2, X4 and X6 led out from the inside, the side part is provided with a lead-out head A led out from the middle part, the upper end of the lower high-voltage coil 302 is provided with three lead-out heads X3, X5 and X7 led out from the inside, and the side part is provided with a lead-out head X led out from the middle part); a stay curtain is arranged between the low-voltage coil 2 and the high-voltage coil 3; the stay curtain comprises insulating paper 4, and a group of first insulating stays 5 are arranged on the insulating paper 4 at intervals along the circumferential direction, so that a plurality of oil passages 6 are formed between the low-voltage coil 2 and the high-voltage coil 3.
Example (b):
in this embodiment, the first insulating stay 5 is formed by hot press molding of a paperboard; the first insulating stay 5 is adhered to the insulating paper 4. From this, can strengthen the atress intensity of oil duct 6, prevent that oil duct 6 from warping, guarantee that oil duct 6's circulation is smooth to guarantee the radiating effect of coil, make the transformer can the safe operation. The distance between two adjacent first insulating supporting strips 5 is adjusted according to the size of the high-low voltage coil. The insulating paper 4 can be AMA insulating paper which has good mechanical toughness and oil resistance and excellent electrical performance; the AMA insulating paper is formed by gluing and compounding three layers of insulating materials, wherein the middle layer is a polyester film, and the upper layer and the lower layer are cable insulating paper.
In this embodiment, two ends of the low-voltage coil 2 and the high-voltage coil 3 are respectively provided with a paperboard ring 7; and a paperboard cushion block 8 is arranged between the paperboard ring 7 and the iron yoke. Therefore, creepage distances between the high-voltage coil 2, the low-voltage coil 3 and the iron yoke can be increased, and the electrical insulation performance of the transformer is ensured; and the paperboard coil 7 and the paperboard cushion block 8 are arranged to form an insulation structure between the high-low voltage coil and the iron yoke, so that the installation is convenient and the implementation is easy, the assembly process of the transformer body can be simplified, the total assembly time is reduced, and the production and manufacturing efficiency of the transformer is improved.
In this embodiment, a set of second insulating supports 9 is provided between the low-voltage coil 2 and the core 1 at intervals. Therefore, after the high-low voltage coil is sleeved, the high-low voltage coil can be tightly supported through the second insulating supporting bars 9, the short-circuit resistance of the high-low voltage coil is improved, meanwhile, the anti-vibration requirement of a transformer body can be improved, and the transformer can be used in severe places. The second insulating supporting strips 9 can be formed by hot-pressing paperboard, and the distance between every two adjacent second insulating supporting strips 9 is adjusted according to the size of the high-voltage coil and the size of the low-voltage coil.
In this embodiment, an insulating pad 10 is disposed between the upper high-voltage coil 301 and the lower high-voltage coil 302; the total height of the upper high voltage coil 301 and the lower high voltage coil 302 corresponds to the height of the low voltage coil 2. Therefore, the insulating cushion blocks 10 are convenient to compress and fasten, and the section insulation performance of the high-voltage coil 3 is ensured.
As a concrete application of the 35kV transformer body insulation structure of the application: the 35kV transformer comprises the 35kV transformer body insulation structure in the application.
The above general description of the invention and the description of its specific embodiments in this application should not be construed as limiting the scope of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the scope of the present application according to the disclosure of the present application without departing from the components of the present invention.
Claims (8)
- The 1.35kV transformer body insulation structure comprises an iron core (1), a low-voltage coil (2) and a high-voltage coil (3); the high-voltage coil (3) is axially split into an upper high-voltage coil (301) and a lower high-voltage coil (302) which are symmetrically distributed; the method is characterized in that: a leading-out wire (A) at the head end of the high-voltage coil is led out from the middle part of the high-voltage coil (301) to the outer side surface of the high-voltage coil; the tail end outgoing line (X) of the high-voltage coil is led out from the middle part of the lower high-voltage coil (302) to the outer side surface of the lower high-voltage coil; the upper high-voltage coil tapping lead-out wires (X2, X4, X6) are led out from the inside of the upper high-voltage coil (301) to the upper end thereof; the lower high-voltage coil tapping lead-out wires (X3, X5, X7) are led out from the interior of the lower high-voltage coil (302) to the lower end thereof; a stay curtain is arranged between the low-voltage coil (2) and the high-voltage coil (3); the stay curtain comprises insulating paper (4), wherein a group of first insulating stays (5) are arranged on the insulating paper (4) at intervals along the circumferential direction, so that a plurality of oil passages (6) are formed between the low-voltage coil (2) and the high-voltage coil (3).
- 2. The 35kV transformer body insulation structure of claim 1, wherein: the first insulating stay (5) is formed by hot pressing of a paperboard.
- 3. The 35kV transformer body insulation structure of claim 1, wherein: and two ends of the low-voltage coil (2) and the high-voltage coil (3) are respectively provided with a paperboard ring (7).
- 4. The 35kV transformer body insulation structure of claim 3, wherein: and a paperboard cushion block (8) is arranged between the paperboard ring (7) and the iron yoke.
- 5. The 35kV transformer body insulation structure of claim 4, wherein: and a group of second insulating supporting strips (9) are arranged between the low-voltage coil (2) and the iron core (1) at intervals.
- 6. The 35kV transformer body insulation structure of claim 1, wherein: an insulating cushion block (10) is arranged between the upper high-voltage coil (301) and the lower high-voltage coil (302).
- 7. The 35kV transformer body insulation structure of claim 6, wherein: the total height of the upper high voltage coil (301) and the lower high voltage coil (302) is equivalent to the height of the low voltage coil (2).
- 8.35kV transformer, its characterized in that: the 35kV transformer body insulation structure comprises the 35kV transformer body insulation structure disclosed by claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221473033.4U CN217386884U (en) | 2022-06-10 | 2022-06-10 | 35kV transformer body insulation structure and 35kV transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221473033.4U CN217386884U (en) | 2022-06-10 | 2022-06-10 | 35kV transformer body insulation structure and 35kV transformer |
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| Publication Number | Publication Date |
|---|---|
| CN217386884U true CN217386884U (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221473033.4U Active CN217386884U (en) | 2022-06-10 | 2022-06-10 | 35kV transformer body insulation structure and 35kV transformer |
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| Country | Link |
|---|---|
| CN (1) | CN217386884U (en) |
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2022
- 2022-06-10 CN CN202221473033.4U patent/CN217386884U/en active Active
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