CN217361322U

CN217361322U - Liquid-immersed transformer

Info

Publication number: CN217361322U
Application number: CN202221405553.1U
Authority: CN
Inventors: 蒋卫民
Original assignee: Individual
Current assignee: Hunan Huarui Yineng Electric Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-09-02
Anticipated expiration: 2032-06-07

Abstract

The utility model discloses a liquid-immersed transformer, which comprises a box body and a cover body; both sides are provided with heat abstractor around the box, heat abstractor includes radiator and communicating pipe, the lateral wall of communicating pipe and box is connected, the communicating pipe inboard is provided with the oil feeding device, the utility model aims at providing a liquid soaks formula transformer makes transformer liquid can circulate in the fin, improves the radiating effect of radiator.

Description

Liquid-immersed transformer

Technical Field

The utility model belongs to the technical field of electric power potential device, specifically be a liquid soaks formula transformer.

Background

The transformer is a device for changing alternating voltage by utilizing the principle of electromagnetic induction; the main components are a primary coil, a secondary coil and an iron core (magnetic core), and the main functions are as follows: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), and the like; the cooling method can be divided into a liquid-immersed transformer and a dry-type transformer, and the liquid-immersed transformer takes oil as a main insulation means of the transformer and depends on the oil as a cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling, forced oil circulation and the like; oil can permeate into the silicon steel sheet layers of the oil-immersed transformer after being immersed into the transformer for a long time, and the liquid of the transformer has elasticity and a buffering effect, so that the oil-immersed transformer has low noise; the main components of the liquid-immersed transformer comprise an iron core, a winding, an oil tank, an oil conservator, a breather, an explosion-proof tube (a pressure relief valve), a radiator, an insulating sleeve, a tap switch, a gas relay, a thermometer, an oil purifier and the like; the liquid-immersed transformer is suitable for transformation of power grids of urban and rural and industrial and mining enterprises, and is more suitable for combined transformers and transformers for pre-installed transformer substations.

However, the transformer generates a lot of heat in the operation process, so corresponding heat dissipation devices need to be equipped, the existing heat radiators are generally fixed on two sides of the oil tank, and the heat in the oil tank is released in a contact heat dissipation mode, but the heat dissipation mode has the problems of poor heat dissipation effect and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at above problem, provide a liquid and soak formula transformer and make transformer liquid can circulate in the fin, improve the radiating effect of radiator.

In order to realize the above purpose, the utility model adopts the technical scheme that: a liquid-immersed transformer is characterized in that: comprises a box body and a cover body; the oil-gas separator is characterized in that heat dissipation devices are arranged on the front side and the rear side of the box body and comprise a radiator and a communication pipe, the communication pipe is connected with the side wall of the box body, and an oil delivery device is arranged on the inner side of the communication pipe.

Furthermore, the radiator comprises radiating fins arranged in rows, communicating pipes are arranged at the upper end part and the lower end part of the radiator, and openings communicated with the communicating pipes are formed in the side wall of the box body; the radiating fin is of an internal hollow structure, and two ends of the radiating fin are communicated with the communicating pipe so as to facilitate the flowing of transformer liquid.

Further, a first oil delivery device is arranged in the communicating pipe;

and/or a second oil delivery device is arranged in the communicating pipe;

the oil supply device comprises a first oil supply device arranged in the communicating pipe, and a second oil supply device arranged in the communicating pipe, wherein the first oil supply device and the second oil supply device are arranged in opposite directions so as to ensure that an oil way is smooth.

Further, the communicating pipe is connected with the side wall of the box body through a connecting flange, and the connecting flange is arranged on the outer side of the opening.

Further, the communicating pipe is connected with the side wall of the box body through a connecting pipe, and the connecting pipe is arranged outside the opening; the oil delivery device is arranged on the connecting pipe or the communicating pipe.

Further, the oil conveying device comprises a circular shell, the middle of the circular shell is provided with a shell through a mounting frame, a driving motor is arranged in the shell, the end part of the driving motor penetrates out of the end part of the shell, and the head end of the driving motor is provided with a blade; and a sealing cover is arranged at the tail end of the driving motor.

Furthermore, the tail end of the shell is provided with an internal thread, the sealing cover is provided with a boss, and the boss is provided with a thread matched with the internal thread.

Further, the outer diameter of the circular shell is matched with the inner diameter of the communicating pipe, and the circular shell is arranged at one end of the communicating pipe.

Further, the tail end of the sealing cover is provided with a guide column; a sealing gasket is arranged at the joint of the sealing cover and the shell; and a sealing ring is arranged between the driving motor shaft and the side wall of the shell.

Furthermore, a high-voltage sleeve and a low-voltage sleeve are respectively arranged on two sides of the box body in the width direction; and/or a high-voltage bushing and a low-voltage bushing are respectively arranged on two sides of the box body in the length direction.

The utility model has the advantages that: the liquid immersion type transformer enables transformer liquid to circulate in the radiating fins, and improves the radiating effect of the radiator.

1. The utility model adopts the connecting flange to replace the traditional communicating pipe, shortens the length required by the installation of the heat dissipation device, further reduces the volume of the transformer, and the oil delivery device can deliver the transformer liquid in the box body into the communicating pipe, promotes the flowing of the transformer liquid, and leads the heat dissipation effect of the transformer to be better; through the radiating fins arranged in the array, the effective contact area is larger, and the radiating effect of the radiator is further improved.

2. The radiating fins arranged in an array of the utility model can increase the effective contact area, thereby improving the radiating effect of the radiator; oil delivery device can make better the circulation between whole box, communicating pipe and radiator of transformer liquid, and then can be more quick distribute away the heat in the box.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of the three-dimensional structure of the present invention.

Fig. 2 is a schematic view (front view) of the three-dimensional structure of the oil feeding device of the present invention.

Fig. 3 is a schematic view (rear view) of the three-dimensional structure of the oil feeding device of the present invention.

Fig. 4 is a front view of the oil feeding device of the present invention.

Fig. 5 is a schematic sectional view at a-a in fig. 4.

Fig. 6 is a schematic view of a part of the enlarged structure at B in fig. 1.

The text labels in the figures are represented as: 1. a box body; 2. a cover body; 3. a heat sink; 4. a high voltage bushing; 5. a low-pressure bushing; 6. a protection box; 7. an oil delivery device; 31. a heat sink; 32. a communicating pipe; 61. mounting a plate; 71. a circular housing; 72. a blade; 73. a drive motor; 74. a housing; 75. a mounting frame; 76. a sealing cover; 77. and a guide post.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model is usually placed when in use, and are used for convenience of description and simplification of description, but do not refer to or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-4, the specific structure of the present invention is: a liquid-immersed transformer comprises a box body 1 and a cover body 2, wherein the box body 1 is a square oil tank which is wide in the front and back and narrow in the left and right; the heat dissipation device 3 is arranged on the front side and the rear side of the box body 1, the heat dissipation device 3 is connected with the box body 1 through bolts and used for dissipating heat of transformer liquid in the box body 1, through holes for the high-voltage sleeve 4 and the low-voltage sleeve 5 to penetrate through are formed in the left side and the right side of the box body 1, and the high-voltage sleeve 4 and the low-voltage sleeve 5 are fixedly arranged on the side wall of the box body 1 through mounting plates; the heat dissipation device 3 comprises a heat radiator 31 and a communication pipe 32, the communication pipe 32 is connected with the side wall of the box body 1 through a connecting flange or a connecting pipe, an oil delivery device 7 is arranged on the inner side of the communication pipe 32, the oil delivery device 7 can deliver the transformer liquid in the box body 1 into the communication pipe 32, the flowing of the transformer liquid is promoted, and the heat dissipation effect of the transformer is better; specifically, the communicating pipe 32 includes an upper communicating pipe disposed at the upper end of the radiator 31 and a lower communicating pipe disposed at the lower end of the radiator 31, a first oil feeding device is disposed in the upper communicating pipe, a second oil feeding device is disposed in the lower communicating pipe, and the first oil feeding device and the second oil feeding device are disposed in opposite directions, so that an oil path is smooth; the oil delivery device 7 arranged oppositely can enable the transformer liquid to form circulation in the communicating pipe 32, the box body 1 and the radiator 31, so that heat dissipation is facilitated; meanwhile, the oil delivery device 7 can promote the circulation of oil in the box body 1, so that the heat dissipation effect of the box body 1 is greatly enhanced, and the condition that the temperature of the transformer is too high is avoided.

The radiator 31 is composed of twelve linear arrays of radiating fins, the distance between two adjacent radiating fins is greater than the thickness of the radiating fins, the upper end and the lower end of the radiator 31 are both provided with a communicating pipe 32, and the side wall of the box body 1 is provided with an opening communicated with the communicating pipe 32; through the radiating fins arranged in an array, the effective contact area is larger, and the radiating effect of the radiator is further improved.

The radiating fins are of an internal hollow structure, namely, cavities are arranged in the radiator, so that the radiating effect of the radiator is better, and two ends of each radiating fin are communicated with the communicating pipes 32 to facilitate the flowing of transformer liquid; the two ends of the radiating fin are provided with arc-shaped openings matched with the communicating pipe 32, feed inlets matched with the arc-shaped openings are arranged on the communicating pipe 32 at intervals, and the radiating fin is connected with the communicating pipe 32 in a welding mode.

The communication pipe 32 is connected with the side wall of the box body 1 through a connecting flange, the connecting flange is arranged on the outer side of the opening, and the connecting flange is connected with the box body 1 and the communication pipe 32 in a welding or bolt connection mode; the traditional communicating pipe is replaced by the connecting flange, so that the length required by the installation of the heat dissipation device 3 is shortened, and the size of the transformer can be further reduced.

The communicating pipe 32 is connected with the side wall of the box body 1 through a connecting pipe, the communicating pipe 32 is connected with the connecting pipe through a bolt, and the connecting pipe is arranged on the outer side of the opening; the oil delivery device 7 is arranged on the connecting pipe or the communicating pipe 32; specifically, the oil delivery device 7 is fixedly arranged in the connecting pipe in a welding mode; adopt the union pipe with box and communicating pipe installation together, the installation of communicating pipe of being convenient for sets up the oil delivery device in 7 simultaneously and is convenient for taking out of oil delivery device, need not dismantle communicating pipe when changing and maintain again and change.

The high-voltage bushing and low-voltage bushing are arranged on the outer sides of the high-voltage bushing 4 and the low-voltage bushing 5, the mounting plates 61 for mounting the high-voltage bushing 4 and the low-voltage bushing 5 are arranged on the left side and the right side of the box body 1, the mounting plates 61 are convexly mounted on the side wall of the box body 1 through connecting plates, the connecting plates are mounted on the side wall of the box body 1 in a welding mode, through holes for placing the bushings are formed in the inner sides of the connecting plates, and the connecting plates are connected with the mounting plates 61 in a welding mode; the protection box 6 is connected with the mounting plate 61 through bolts; the arrangement of the protection box can play a good protection role in the wiring sleeve.

The oil delivery device 7 comprises a circular shell 71, a shell 74 is arranged in the middle of the circular shell 71 through a mounting frame 75, the mounting frame 75 is arranged on the periphery of the shell 74 in a circular array mode and used for fixing the shell 74, a driving motor 73 is arranged inside the shell 74 and is a servo motor, the driving motor is communicated with a power supply through a switch, an output shaft at the end of the driving motor 73 penetrates out of the left end of the shell 74, and blades 72 are arranged at the head end of the output shaft of the driving motor 73; the tail end of the driving motor 73 is provided with a sealing cover 76; oil delivery device can make better the circulation between whole box, communicating pipe and radiator of transformer liquid, and then can be more quick distribute away the heat in 1.

The tail end of the shell 74 is provided with an internal thread, the sealing cover 76 is provided with a boss, the boss is provided with a thread matched with the internal thread, and the sealing cover 76 and the shell 74 are fixed conveniently through matching of the thread and the internal thread.

The outer diameter of the circular shell 71 is matched with the inner diameter of the communication pipe 32, threads are arranged on the outer side of the circular shell 71 and the inner side of the communication pipe 32, so that the oil delivery device 7 is conveniently fixed inside the communication pipe 32, and the circular shell 71 is arranged at the head end of the communication pipe 32; it is convenient to feed the transformer fluid in the tank 1 into the communicating pipe 32.

Wherein, the end of the sealing cover 76 is provided with a guide post 77; a sealing gasket is arranged at the joint of the sealing cover 76 and the shell 74; and a sealing ring is arranged between the shaft of the driving motor 73 and the side wall of the shell 74.

Wherein, two sides of the box body 1 in the width direction are respectively provided with a high-voltage bushing 4 and a low-voltage bushing 5; and/or, two sides of the box body 1 in the length direction are respectively provided with a high-voltage bushing 4 and a low-voltage bushing 5; specifically, the high-voltage bushing and the low-voltage bushing are disposed on the narrow side of the box 1.

When the transformer liquid cooling device is used specifically, after the whole transformer is assembled, transformer liquid is injected into the box body 1 to completely soak the coil and the iron core, the control switch of the driving motor 73 is turned on, the driving motor 73 drives the blades 72 to rotate, so that the transformer liquid in the box body 1 is sent into the upper communicating pipe 32 and then is cooled through the radiator 31, the transformer liquid is discharged from the lower communicating pipe 32 after the cooling is completed, and the transformer liquid in the communicating pipe 32 can be sent out by the oil sending device 7 arranged in the lower communicating pipe 32.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims

1. A liquid-immersed transformer is characterized in that: comprises a box body (1) and a cover body (2); both sides are provided with heat abstractor (3) around box (1), heat abstractor (3) include radiator (31) and communicating pipe (32), communicating pipe (32) are connected with the lateral wall of box (1), communicating pipe (32) inboard is provided with oil delivery device (7).

2. The liquid-immersed transformer according to claim 1, wherein: the radiator (31) comprises radiating fins arranged in rows, the upper end and the lower end of the radiator (31) are both provided with communicating pipes (32), and the side wall of the box body (1) is provided with an opening communicated with the communicating pipes (32); the radiating fin is of an internal hollow structure, and two ends of the radiating fin are communicated with the communicating pipe (32) so as to facilitate the flowing of transformer liquid.

3. The liquid-immersed transformer according to claim 2, wherein: a first oil delivery device arranged in the communicating pipe (32);

and/or a second oil delivery device arranged in the communication pipe (32);

the oil pump is characterized in that a first oil delivery device is arranged in the communicating pipe (32), a second oil delivery device is arranged in the communicating pipe (32), and the first oil delivery device and the second oil delivery device are arranged in opposite directions so as to enable an oil path to be smooth.

4. The liquid-immersed transformer according to claim 2, wherein: the communicating pipe (32) is connected with the side wall of the box body (1) through a connecting flange, and the connecting flange is arranged on the outer side of the opening.

5. The liquid-immersed transformer according to claim 2, wherein: the communicating pipe (32) is connected with the side wall of the box body (1) through a connecting pipe, and the connecting pipe is arranged on the outer side of the opening; the oil delivery device (7) is arranged on the connecting pipe or the communicating pipe (32).

6. The liquid-immersed transformer according to claim 1, wherein: the oil delivery device (7) comprises a circular shell (71), a shell (74) is arranged in the middle of the circular shell (71) through a mounting frame (75), a driving motor (73) is arranged in the shell (74), the end part of the driving motor (73) penetrates out of the end part of the shell (74), and a blade (72) is arranged at the head end of the driving motor (73); and a sealing cover (76) is arranged at the tail end of the driving motor (73).

7. The liquid-immersed transformer according to claim 6, wherein: the tail end of the shell (74) is provided with an internal thread, the sealing cover (76) is provided with a boss, and the boss is provided with a thread matched with the internal thread.

8. The liquid-immersed transformer according to claim 6, wherein: the outer diameter of the circular shell (71) is matched with the inner diameter of the communication pipe (32), and the circular shell (71) is arranged at one end of the communication pipe (32).

9. The liquid-immersed transformer according to claim 6, wherein: the tail end of the sealing cover (76) is provided with a guide post (77); a sealing gasket is arranged at the joint of the sealing cover (76) and the shell (74); and a sealing ring is arranged between the shaft of the driving motor (73) and the side wall of the shell (74).

10. The liquid-immersed transformer according to claim 1, wherein: a high-voltage sleeve (4) and a low-voltage sleeve (5) are respectively arranged on two sides of the box body (1) in the width direction; and/or a high-voltage bushing (4) and a low-voltage bushing (5) are respectively arranged on two sides of the box body (1) in the length direction.