CN211980335U

CN211980335U - Oil-leakage-proof oil-immersed transformer

Info

Publication number: CN211980335U
Application number: CN202020421157.2U
Authority: CN
Inventors: 邓腾龙
Original assignee: Chengdu Jiuzhixing Technology Co ltd
Current assignee: Chengdu Jiuzhixing Technology Co ltd
Priority date: 2020-03-28
Filing date: 2020-03-28
Publication date: 2020-11-20
Anticipated expiration: 2030-03-28

Abstract

The utility model relates to an oil-leakage-proof oil-immersed transformer, which belongs to the field of power transformers and comprises a transformer shell, a transformer cover body and a sealing ring body, wherein the top opening of the transformer shell is covered by the transformer cover body, the sealing ring body is in the shape of a circular strip and is arranged at the covering part of the transformer cover body and the transformer shell; the sealing ring comprises a sealing ring body, and is characterized in that a shaping section, an air bag section and a corrugated section are respectively arranged in the width direction of the sealing ring body from inside to outside, an annular shaping steel ring is embedded in the shaping section, an air bag cavity is arranged in the air bag section, the air bag cavity is in an annular shape connected with the head and isolated from the outside air, and the corrugated section is provided with corrugated folds; on one hand, the position with larger gap between the transformer shell and the cover body is effectively sealed under the action of the air pressure of the air bag cavity by utilizing the characteristic of the air flow in the air bag cavity; on the other hand, the outer side of the sealing ring is designed in a corrugated shape, so that the density of the sealing ring is increased at the sealing position.

Description

Oil-leakage-proof oil-immersed transformer

Technical Field

The utility model relates to an oil-immersed transformer of leak protection oil belongs to the power transformer field.

Background

The oil immersed transformer is one of the distribution transformers, and has the advantages of good insulating property and heat conducting property of transformer oil, low cost of transformer oil, capability of solving the problems of high-capacity heat dissipation and high-voltage insulation of the transformer and the like; the oil-immersed transformer is filled with transformer oil in an oil tank, and the oil-resistant rubber element is pressurized and sealed by a fastening piece in the assembly process. The lack of tight sealing is a major cause of oil leakage from transformers, and particular attention should be paid to maintenance and repair. The sealing performance of the transformer is seriously affected by whether the rubber is broken or seriously deformed, and in addition, because the sealing line of the oil-immersed transformer is very long, and the gap distance between the transformer shell and the cover body is uneven in the final production and manufacturing process of the transformer shell, the leakage of the transformer at a position with a large gap is easily caused.

Disclosure of Invention

The utility model aims to solve the problems and is designed, on one hand, the characteristic of the airflow in the air bag cavity is utilized, so that the position with larger gap between the transformer shell and the cover body is effectively sealed under the air pressure action of the air bag cavity; on the other hand, the outer side of the sealing ring is designed in a corrugated shape, so that the density of the sealing ring is increased at the sealing position.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model discloses an oil-leakage-proof oil-immersed transformer, which comprises a transformer shell, a transformer cover body and a sealing ring body, wherein the top of the transformer shell is opened, the transformer cover body covers the opening, the sealing ring body is in a ring belt shape, and the sealing ring body is arranged at the covering part of the transformer cover body and the transformer shell; the width direction of the sealing ring body is respectively a shaping section, an air bag section and a corrugated section from inside to outside, an annular shaping steel ring is embedded in the shaping section, an air bag cavity is arranged in the air bag section, the air bag cavity is in an annular shape connected with the head and isolated from the outside air, and the corrugated section is provided with corrugated folds.

Further, an oil conservator body supporting frame is arranged on the transformer cover body, and an oil conservator body is fixed on the oil conservator body supporting frame; the height of the conservator body is higher than that of the transformer shell; the bottom of the conservator body is connected to the transformer cover body through a pipeline and communicated into the transformer shell.

Furthermore, a safety air passage is arranged on the transformer cover body, the upper end of the safety air passage extends to the upper part of the conservator body and is connected with a pressure limiting valve, and the lower end of the safety air passage is communicated into the transformer shell.

Furthermore, an explosion-proof oil valve is arranged on the lower portion of the side face of the transformer shell.

Furthermore, a plurality of U-shaped radiating fins are arranged on the periphery of the transformer shell.

Furthermore, a high-voltage connecting post is arranged on the transformer cover body, a transformer coil winding is arranged on the transformer shell, and the high-voltage connecting post is electrically connected with the high-voltage side of the transformer coil winding.

The utility model has the advantages that:

1. the gap between the cover body and the shell of the transformer is long, and the width of the gap at each position of the gap line cannot be completely ensured to be the same during processing; the position with larger gap width is often the important reason for the oil leakage caused by the poor sealing of the sealing ring; in the scheme, the sealing pressure compensation is carried out on the position with larger gap width under the action of the air pressure of the air bag cavity by utilizing the design of the air bag cavity and the flowability characteristic of the gas;

2. the periphery of the sealing ring is designed into a corrugated shape, and when the transformer is sealed, the density of the sealing ring can be increased at a gap between the cover body and the shell, so that the sealing pressure of the sealing ring is increased; the sealing effect is improved;

3. the shaping steel ring is arranged on the inner side of the sealing ring, and the shaping steel ring can shape the sealing ring, so that the sealing ring is convenient to mount, and the influence of dislocation on the position of the sealing ring when the cover body and the shell are mounted is reduced;

4. in addition, the conservator body, the explosion-proof oil valve, the safety air channel and other structures arranged on the transformer can effectively control the oil pressure in the transformer, and the sealing performance is guaranteed.

Drawings

Fig. 1 is an overall structural view of the oil-immersed transformer;

FIG. 2 is a cross-sectional view of a seal ring body of the oil-immersed transformer;

fig. 3 is an overall view of a seal ring body of the oil-immersed transformer.

Reference numerals: 1-transformer shell, 2-transformer cover, 3-sealing ring body, 4-high voltage connecting electric column, 5-U-shaped radiating fin, 6-explosion-proof oil valve, 7-safety air channel, 8-conservator body, 9-conservator body supporting frame, 301-shaping section, 302-air bag section, 303-ripple section and 304-air bag cavity.

Detailed Description

As shown in the accompanying drawings, the utility model discloses an oil-immersed transformer of leak protection oil, including transformer casing 1, transformer lid 2 and sealing washer body 3, transformer casing 1's open-top, 2 lids of transformer lid close at this opening part, and sealing washer body 3 is the annular strip, and this sealing washer body 3 sets up and closes the department at the lid of transformer lid 2 and transformer casing 1.

An oil conservator body supporting frame 9 is arranged on the transformer cover body 2, and an oil conservator body 8 is fixed on the oil conservator body supporting frame 9; the height of the conservator body 8 is higher than that of the transformer shell 1; the bottom of the conservator body 8 is connected to the transformer cover body 2 through a pipeline and communicated into the transformer shell 1; the transformer cover body 2 is also provided with a safety air passage 7, the upper end of the safety air passage 7 extends to the upper part of the conservator body and is connected with a pressure limiting valve, and the lower end of the safety air passage 7 is communicated into the transformer shell body 1.

An anti-explosion oil valve 6 is arranged on the lower part of the side surface of the transformer shell 1; a plurality of U-shaped radiating fins 5 are arranged around the transformer shell 1.

The transformer cover body 2 is provided with a high-voltage connecting post 4, the transformer shell body 1 is provided with a transformer coil winding, and the high-voltage connecting post 4 is electrically connected with the high-voltage side of the transformer coil winding.

The oil conservator body, the explosion-proof oil valve 6, the safety air channel 7 and other structures arranged on the transformer can effectively control the oil pressure in the transformer, and the sealing performance is guaranteed.

As shown in fig. 2, the sealing ring body 3 includes a shaping section 301, an air bag section 302 and a corrugated section 303 from inside to outside in the width direction, an annular shaping steel ring is embedded in the shaping section 301, an air bag cavity is provided in the air bag section 302, the air bag cavity is in an annular shape connected with the head of the air bag cavity and isolated from the outside air, and the corrugated section 303 has corrugated folds. The gap line between the cover body and the shell of the transformer is long, and the width of the gap at each position of the gap line cannot be completely guaranteed to be the same during processing; the design of the air bag cavity utilizes the flowability characteristic of gas, so that the sealing pressure compensation is carried out on the position with larger gap width under the air pressure action of the air bag cavity; the periphery of the sealing ring is designed into a corrugated shape, and when the transformer is sealed, the density of the sealing ring can be increased at a gap between the cover body and the shell, so that the sealing pressure of the sealing ring is increased, and the sealing effect is improved; the shaping steel ring is arranged on the inner side of the sealing ring and can shape the sealing ring, so that the sealing ring can be conveniently installed on the sealing ring, and the influence of dislocation on the position of the sealing ring when the cover body and the shell are installed is reduced.

The foregoing examples are provided for clarity of illustration only and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.

Claims

1. An oil-leakage-proof oil-immersed transformer is characterized by comprising a transformer shell (1), a transformer cover body (2) and a sealing ring body (3), wherein the top of the transformer shell (1) is opened, the transformer cover body (2) covers the opening, the sealing ring body (3) is in an annular belt shape, and the sealing ring body (3) is arranged at the covering position of the transformer cover body (2) and the transformer shell (1); the width direction of the sealing ring body (3) is respectively a shaping section, an air bag section and a corrugated section from inside to outside, an annular shaping steel ring is embedded in the shaping section, an air bag cavity is arranged in the air bag section, the air bag cavity is in an annular shape connected with the head and isolated from the outside air, and the corrugated section is provided with corrugated folds.

2. The oil-leakage-preventing oil-immersed transformer of claim 1, wherein an oil conservator body support frame (9) is arranged on the transformer cover (2), and an oil conservator body (8) is fixed on the oil conservator body support frame (9); the height of the conservator body (8) is higher than that of the transformer shell (1); the bottom of the conservator body (8) is connected to the transformer cover body (2) through a pipeline and communicated into the transformer shell (1).

3. The oil-leakage-proof oil-immersed transformer of claim 2, wherein the transformer cover (2) is provided with a safety air passage (7), the upper end of the safety air passage (7) extends to the ice connection pressure limiting valve above the conservator body, and the lower end of the safety air passage (7) is communicated into the transformer shell (1).

4. Oil-filled transformer with oil leakage prevention according to claim 3, characterized in that an oil explosion-proof valve (6) is arranged at the lower part of the side of the transformer housing (1).

5. Oil-filled transformer with oil leakage prevention according to claim 4, characterized in that several U-shaped cooling fins (5) are arranged around the transformer housing (1).

6. Oil-filled transformer with oil leakage prevention according to claim 1, characterized in that a high voltage connection post (4) is arranged on the transformer cover (2), a transformer coil winding is arranged on the transformer housing (1), and the high voltage connection post (4) is electrically connected to the high voltage side of the transformer coil winding.