CN217426503U

CN217426503U - Power transformer coil structure for oil-immersed power transformer

Info

Publication number: CN217426503U
Application number: CN202221312318.XU
Authority: CN
Inventors: 臧登福; 刘小利
Original assignee: Nanjing Daqo Transformer Systems Co ltd
Current assignee: Nanjing Daqo Transformer Systems Co ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-09-13
Anticipated expiration: 2032-05-30

Abstract

The utility model discloses an oil-immersed power transformer becomes coil structure with electricity, including a plurality of iron cores, all be equipped with the coil on a plurality of iron cores, the equal fixed connection winding frame in both ends of iron core, the fixed frame of fixed mounting between the outer wall of two winding frames, coil and iron core are located fixed frame, install outer water conservancy diversion mechanism between the outer wall of coil and the inner wall of fixed frame, install interior water conservancy diversion mechanism between the inner chamber of iron core and the top of fixed frame. Through outer water conservancy diversion mechanism and interior water conservancy diversion mechanism for transformer oil fully flows between coil outer wall and fixed frame inner wall, then flows through iron core inner chamber and fixed frame roof, realizes transformer oil and circulates comprehensively, avoids appearing the dead oil district, realizes the comprehensive heat dissipation of coil, improves the radiating efficiency.

Description

Power transformer coil structure for oil-immersed power transformer

Technical Field

The utility model relates to a transformer technical field specifically is a power transformation coil structure for oil-immersed power transformer.

Background

Oil-immersed transformer is through soaking coil winding in transformer oil, thereby carry out the transformer that cools down to coil winding through transformer oil's heat transfer, present oil-immersed transformer's transformer oil all directly fills in transformer housing, carry out the oil storage through transformer top oil tank, the oil duct is vertical oil duct structure, in the region of keeping away from the oil duct, there is the phenomenon in the oil stream smooth and stagnant oil district, the unable even heat dissipation of coil, to the above-mentioned problem, the inventor provides a power transformer coil structure for oil-immersed power transformer and is used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The oil duct of the oil-immersed transformer is of a longitudinal oil duct structure, and the problems that oil flow is not smooth and oil is blocked in an area far away from the oil duct, and a coil cannot uniformly dissipate heat are solved; an object of the utility model is to provide a power transformation coil structure for oil-immersed power transformer.

In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides an oil-immersed power transformer is with power transformer coil structure, includes a plurality of iron cores, and is a plurality of all be equipped with the coil on the iron core, the equal fixed connection winding frame in both ends of iron core, two fixed frame of fixed mounting between the outer wall of winding frame, coil and iron core are located fixed frame, install outer water conservancy diversion mechanism between the outer wall of coil and the inner wall of fixed frame, water conservancy diversion mechanism in installing between the inner chamber of iron core and the top of fixed frame.

Preferably, a connecting wire is fixedly penetrated through the winding frame on the top of the iron core, and the connecting wire is electrically connected with the coil.

Preferably, the coil is divided into a first diversion area, a second diversion area, a third diversion area, a fourth diversion area and a fifth diversion area from row to row along the axial direction of the iron core, and the fifth diversion area is communicated with the bottom of the inner cavity of the iron core.

Preferably, outer water conservancy diversion mechanism includes outer baffle, equal fixed mounting outer baffle between coil outer wall and the fixed frame inner wall in first district of water conservancy diversion, two districts of water conservancy diversion, three districts of water conservancy diversion, four districts of water conservancy diversion and five districts of water conservancy diversion intervals, it has the outflowing hole all to open on the outer baffle, the one end fixed connection of the roof of fixed frame advances oil pipe.

Preferably, two adjacent outflow holes in the outer partition plate are respectively positioned on the inner walls of two sides of the fixed frame, and the outflow holes between the first diversion area and the second diversion area are positioned on the inner wall of the fixed frame far away from the oil inlet pipe.

Preferably, interior water conservancy diversion mechanism includes a plurality of interior baffles, the iron core inner wall of first district of water conservancy diversion, two districts of water conservancy diversion, three districts of water conservancy diversion, four districts of water conservancy diversion and five district's of water conservancy diversion intervals department all fixed mounting has an interior baffle, all open on the interior baffle has interior flow hole, and is adjacent interior flow hole on the interior baffle is located the both sides inner wall department of iron core, the roof of fixed frame is opened has just to the oil-out of iron core inner chamber.

Preferably, the top plate of the fixing frame is tightly attached to the top of the iron core, and limiting plates are fixedly mounted on the top of the fixing frame and the side wall between the oil outlet and the oil inlet pipe.

Compared with the prior art, the beneficial effects of the utility model reside in that:

divide into a district with the coil along the axial, and set up outer baffle between coil outer wall and fixed frame inner wall, correspond in the iron core and set up a plurality of inner baffles, then transformer oil in the oil tank of transformer outside sends into water conservancy diversion first district through oil pump and oil inlet pipe, then flow through water conservancy diversion second district in proper order through the outfall that distributes crisscross, three district of water conservancy diversion, four districts of water conservancy diversion and five districts of water conservancy diversion, then flow into the iron core inner chamber through five districts of water conservancy diversion, flow to fixed frame outside through interior discharge orifice and the oil-out on a plurality of inner baffles, fixed frame and winding frame fixed mounting are in the transformer housing, then transformer oil flows to the heat dissipation fin heat dissipation through current transformer housing after fixed frame outside, flow to the oil tank in through the pipeline, realize transformer oil's comprehensive circulation, avoid appearing the dead oil district, thereby carry out comprehensive heat dissipation to the coil, improve the radiating efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the cross-sectional structure of the present invention.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2 according to the present invention.

In the figure: 1. an iron core; 2. a winding frame; 3. a coil; 4. a fixing frame; 5. an outer flow guide mechanism; 51. an outer partition plate; 52. an outflow hole; 53. an oil inlet pipe; 6. an inner flow guide mechanism; 61. an inner partition plate; 62. an inner flow aperture; 63. an oil outlet; 7. guiding a flow to a first area; 8. a second diversion area; 9. a third diversion area; 10. guiding the flow in a fourth area; 11. a fifth diversion area; 12. a limiting plate; 13. and connecting the wires.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): as shown in fig. 1-3, the utility model provides a power transformer coil structure for oil-immersed power transformer, which comprises a plurality of iron cores 1, wherein a coil 3 is arranged on each iron core 1, winding frames 2 are fixedly connected with both ends of each iron core 1, a fixed frame 4 is fixedly installed between the outer walls of the two winding frames 2, the coil 3 and the iron core 1 are positioned in the fixed frame 4, an outer diversion mechanism 5 is installed between the outer wall of the coil 3 and the inner wall of the fixed frame 4, an inner diversion mechanism 6 is installed between the inner cavity of the iron core 1 and the top of the fixed frame 4, the outer diversion mechanism 5 comprises an outer baffle plate 51, an outer baffle plate 51 is fixedly installed between the outer wall of the coil 3 at the interval between a diversion first area 7 and a diversion second area 8, a diversion area 9, a diversion fourth area 10 and a diversion area 11 and the inner wall of the fixed frame 4, an outer flow hole 52 is opened on the outer baffle plate 51, one end of the top plate of the fixed frame 4 is fixedly connected with an oil inlet pipe 53, the inner diversion mechanism 6 comprises a plurality of inner baffles 61, inner baffles 61 are fixedly arranged on the inner walls of the iron core 1 at the intervals of a first diversion area 7, a second diversion area 8, a third diversion area 9, a fourth diversion area 10 and a fifth diversion area 11, inner flow holes 62 are formed in the inner baffles 61, the inner flow holes 62 in the adjacent inner baffles 61 are located on the inner walls of the two sides of the iron core 1, and an oil outlet 63 facing the inner cavity of the iron core 1 is formed in the top plate of the fixing frame 4.

Through the technical scheme, the coil 3 is divided into 5 zones along the axial direction, an outer partition plate 51 is arranged between the outer wall of the coil 3 and the inner wall of a fixed frame 4, a plurality of inner partition plates 61 are correspondingly arranged in the iron core 1, the top of a transformer shell of an oil-immersed transformer is provided with an oil tank, transformer oil is supplemented into the transformer shell through the oil tank, the coil is subjected to heat exchange through the transformer oil, the scheme is connected with the oil tank through an oil inlet pipe 53, similarly, the oil outlet pipe is also arranged on the transformer shell at the position of the oil inlet pipe 53, the transformer oil is reflowed into the oil tank through the oil outlet pipe, the circular flow of the transformer oil is formed, the transformer oil in the oil tank outside the transformer is sent into a first flow guide zone 7 through the oil pump and the oil inlet pipe 53, then sequentially flows through a second flow guide zone 8, a third flow zone 9, a fourth flow guide zone 10 and a fifth flow guide zone 11 through staggered outer flow holes 52 and then flows into the inner cavity of the iron core 1 through the fifth flow guide zone 11, the internal flow holes 62 and the oil outlets 63 on the inner partition plates 61 flow to the outside of the fixed frame 4, the fixed frame 4 and the winding frame 2 are fixedly installed in the transformer shell, then the transformer oil flows to the outside of the fixed frame 4 and then is dissipated through the heat dissipation fins of the existing transformer shell, and the transformer oil flows into the oil tank through a pipeline, so that the comprehensive circulation of the transformer oil is realized, the dead oil area is avoided, the coil 3 is comprehensively dissipated, and the heat dissipation efficiency is improved.

Further, as shown in fig. 2, the outer flow holes 52 on the outer partition plate 51 between the first diversion area 7 and the second diversion area 8 and the outer flow holes 52 on the outer partition plate 51 between the third diversion area 9 and the fourth diversion area 10 are both located on the side far from the oil inlet pipe 53, the outer flow holes 52 on the outer partition plate 51 between the second diversion area 8 and the third diversion area 9 and the outer flow holes 52 on the outer partition plate 51 between the fourth diversion area 10 and the fifth diversion area 11 are both located on the side near the oil inlet pipe 53, so that after the transformer oil enters the first diversion area 7 from the oil inlet pipe 53, the transformer oil can only completely flow through the first diversion area 7, then flow into the second diversion area 8 from the outer flow holes 52 between the first diversion area 7 and the second diversion area 8, then completely flow through the second diversion area 8, and then flow into the third diversion area 9 from the outer flow holes 52 between the second diversion area 8 and the third diversion area 9, and similarly, the third diversion area 9 and the fourth diversion area 10 are also in a staggered distribution manner of the outer flow holes 52, so that the transformer oil completely flows through each subarea to achieve the purpose of overall heat absorption.

Furthermore, a connecting wire 13 is fixedly penetrated through the winding frame 2 at the top of the iron core 1, and the connecting wire 13 is electrically connected with the coil 3.

Through the technical scheme, the coil 3 can be connected with the external circuit of the transformer

Further, the coil 3 is divided into a first diversion area 7, a second diversion area 8, a third diversion area 9, a fourth diversion area 10 and a fifth diversion area 11 from row to row along the axial direction of the iron core 1, and the fifth diversion area 11 is communicated with the bottom of the inner cavity of the iron core 1.

Through the technical scheme, a plurality of flow guide areas are formed outside the coil 3, so that the transformer oil can flow sufficiently.

Further, the outer flow holes 52 of two adjacent outer partition plates 51 are respectively located at the inner walls of two sides of the fixed frame 4, and the outer flow hole 52 between the first diversion area 7 and the second diversion area 8 is located at the inner wall of the fixed frame 4 far away from the oil inlet pipe 53.

Through the technical scheme, the transformer oil can fully flow, and the dead oil zone is avoided.

Further, the top plate of the fixed frame 4 is tightly attached to the top of the iron core 1, and the top and the side wall of the fixed frame 4 between the oil outlet 63 and the oil inlet pipe 53 are both fixedly provided with a limiting plate 12.

Through the technical scheme, the oil inlet pipe 53 and the oil outlet 63 are separated by the limiting plate 12, so that the transformer oil flowing out of the oil outlet 63 can only flow through the fixing frame 4 and the bottom of the inner cavity of the transformer shell, the oil outlet pipe can be arranged on the transformer shell at the position of the oil inlet pipe 53, and the sufficient flow of the transformer oil is further realized.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides an oil-immersed power transformer becomes coil structure, includes a plurality of iron cores (1), its characterized in that: a plurality of all be equipped with coil (3) on iron core (1), the equal fixed connection winding frame (2) in both ends of iron core (1), two be provided with fixed frame (4) between the outer wall of winding frame (2), coil (3) and iron core (1) are located fixed frame (4), be equipped with outer water conservancy diversion mechanism (5) between the outer wall of coil (3) and the inner wall of fixed frame (4), be equipped with interior water conservancy diversion mechanism (6) between the inner chamber of iron core (1) and the top of fixed frame (4).

2. The power transformer structure for oil-immersed power transformer according to claim 1, characterized in that the winding frame (2) on the top of the iron core (1) is provided with a connecting wire (13), and the connecting wire (13) is electrically connected with the coil (3).

3. The power transformer coil structure for the oil-immersed power transformer according to claim 1, wherein the coil (3) is divided into a first diversion area (7), a second diversion area (8), a third diversion area (9), a fourth diversion area (10) and a fifth diversion area (11) from top to bottom along the axial direction of the iron core (1), and the fifth diversion area (11) is communicated with the bottom of an inner cavity of the iron core (1).

4. The oil-immersed power transformer power conversion coil structure according to claim 3, wherein the outer diversion mechanism (5) comprises an outer partition plate (51), the outer partition plate (51) is arranged between the outer wall of the coil (3) at the interval of the first diversion area (7), the second diversion area (8), the third diversion area (9), the fourth diversion area (10) and the fifth diversion area (11) and the inner wall of the fixing frame (4), the outer partition plate (51) is provided with an outer flow hole (52), and one end of the top plate of the fixing frame (4) is fixedly connected with an oil inlet pipe (53).

5. The oil-immersed power transformer power conversion coil structure according to claim 4, wherein the outflow holes (52) of two adjacent outer partition plates (51) are respectively arranged at the inner walls of two sides of the fixed frame (4), and the outflow hole (52) between the first flow guiding area (7) and the second flow guiding area (8) is positioned at the fixed frame (4) far away from the oil inlet pipe (53).

6. The oil-immersed power transformer power conversion coil structure according to claim 4, wherein the inner diversion mechanism (6) comprises a plurality of inner baffles (61), inner baffles (61) are arranged on the inner wall of the iron core (1) at the interval of the first diversion area (7), the second diversion area (8), the third diversion area (9), the fourth diversion area (10) and the fifth diversion area (11), inner flow holes (62) are formed in the inner baffles (61), the inner flow holes (62) in the adjacent inner baffles (61) are located on the inner walls of two sides of the iron core (1), and the fixing frame (4) is provided with an oil outlet (63) facing the inner cavity of the iron core (1).

7. The oil-immersed power transformer coil structure as claimed in claim 6, wherein the top plate of the fixed frame (4) is connected with the top of the iron core (1), and the top and side walls of the fixed frame (4) between the oil outlet (63) and the oil inlet pipe (53) are provided with a limiting plate (12).