CN211654517U

CN211654517U - Oil-immersed transformer

Info

Publication number: CN211654517U
Application number: CN202020538036.6U
Authority: CN
Inventors: 王成鲲
Original assignee: Yuheng Electric Hubei Co ltd
Current assignee: Yuheng Electric Hubei Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-10-09
Anticipated expiration: 2030-04-13

Abstract

The utility model provides an oil-immersed transformer belongs to transformer technical field. This transformer includes the oil tank, compensation oil box and cooling tube, compensation oil box fixes on the oil tank, the cooling tube is fixed on the outer wall of oil tank through a plurality of clamps, the clearance has between cooling tube and the oil tank outer wall, the one end intercommunication oil tank bottom of cooling tube, the bottom of compensation oil box is connected to the other end of cooling tube, communicate with each other through a takeover between the middle part of compensation oil box and the top of oil tank, takeover department is provided with the check valve that allows the transformer oil in the oil tank to get into in the compensation oil box, the junction of compensation oil box and cooling tube is provided with the oil pump that can impress the transformer oil in the compensation oil box into the cooling tube, the last external breathing hole of a connection that has of compensation oil box, be provided with the gasbag that blocks the breathing hole. The utility model has the advantages of can improve transformer radiating effect.

Description

Oil-immersed transformer

Technical Field

The utility model belongs to the technical field of the transformer, a oil-immersed transformer is related to.

Background

The enclosed oil-immersed transformer is mainly used in places with much oil stains and chemicals in the petroleum and chemical industry, the environment is severe, components such as an iron core and a winding are soaked in an oil shell filled with transformer oil, the components such as the winding are wrapped by the transformer oil, the performances such as insulation and dehumidification are improved, and the heat dissipation performance of the oil-immersed transformer is an important index of the comprehensive performance of the oil-immersed transformer due to the fact that a large amount of heat is generated in the working process of the winding and the like.

The existing oil-immersed transformer generally utilizes the corrugated sheet on the outer wall of the oil shell to realize heat dissipation in order to increase the heat dissipation area, and the heat dissipation effect is poor by a natural heat conduction mode.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an oil-immersed transformer to the above-mentioned problem that prior art exists, the utility model aims to solve the technical problem that how improve the radiating effect of transformer tank.

The purpose of the utility model can be realized by the following technical proposal: an oil-immersed transformer is characterized in that the transformer comprises an oil tank, a compensation oil box and a radiating pipe, the compensation oil box is fixed on the oil tank, the radiating pipe is fixed on the outer wall of the oil tank through a plurality of hoops, a gap is arranged between the radiating pipe and the outer wall of the oil tank, one end of the radiating pipe is communicated with the bottom of the oil tank, the other end of the radiating pipe is connected with the bottom of the compensation oil box, the middle part of the compensation oil box is communicated with the top of the oil tank through a connecting pipe, the connecting pipe is provided with a one-way valve which allows the transformer oil in the oil tank to enter the compensation oil box, the joint of the compensation oil box and the radiating pipe is provided with an oil pump which can press the transformer oil in the compensation oil box into the radiating pipe, the compensation oil box is provided with a breathing hole connected with the outside, an air bag for covering the breathing hole is arranged in the compensation oil box, and the oil pump is positioned in the compensation oil box.

The air bag is used for balancing the pressure in the compensation oil box, and meanwhile, in order to balance the pressure in the oil tank, when the pressure in the oil tank is large, the transformer oil overflows into the compensation oil box from the connecting pipe, and when the pressure in the oil tank is small, the transformer oil enters the oil tank from the radiating pipe.

Through the distribution of the radiating pipes on one side surface or a plurality of side surfaces of the oil tank, the transformer oil in the compensation oil box and the transformer oil in the oil tank are circularly exchanged by the oil pump, so that the transformer oil in the oil tank is circulated to the outside of the oil tank to be cooled, the radiating area is greatly improved, and the heat conduction efficiency is improved.

In the oil immersed transformer, the oil pump includes a micro motor, a housing of the micro motor is fixed on an inner wall of the compensation oil box, an output shaft of the micro motor is rotatably connected with a guide sleeve, the guide sleeve is fixed on the housing of the micro motor, the guide sleeve is longitudinally and slidably connected with a push block, the guide sleeve is connected with the push block through a spline, a valve hole is arranged at the bottom of the compensation oil box, a valve block fixed on the push block is slidably connected in the valve hole, a blocking piece is arranged below the valve block, the blocking piece is connected to the push block through a return spring, a liquid outlet hole capable of being blocked by the blocking piece is arranged on the valve block, an active turntable is fixedly arranged on the output shaft of the micro motor, a passive turntable is fixedly arranged on the push block, and a plurality of permanent magnet strips I are circumferentially and uniformly distributed on the active turntable, the lower end of the first permanent magnet strip is homopolar with the upper end of the second permanent magnet strip.

In the oil-immersed transformer, a temperature control switch is arranged in the connecting pipe, and a circuit of the micro motor is conducted when the temperature control switch is turned on.

The micro motor is started after the temperature control switch is started, the starting temperature of the temperature control switch is a set value, the disconnection temperature is a set value, when the temperature reaches the set value, the micro motor drives the driving turntable to rotate, the driven turntable which only can move longitudinally is driven to move downwards in the positive and negative pairs of the permanent magnet strips and the permanent magnet strips, which generate repulsive force, and the driven turntable resets under the action of the reset spring, so that the micro motor can drive the push block to rapidly reciprocate longitudinally under the condition of slow rotation, the transformer oil in the compensation oil box is continuously extruded into the heat radiation pipe, and the reciprocating circulation of the transformer oil between the oil box and the compensation oil box is realized.

In the oil-immersed transformer, the push block is provided with a guide hole, an output shaft of the micro motor is connected with the inner wall of the guide hole through a bearing, an outer ring of the bearing is connected with the inner wall of the guide hole through a spline, and the reset spring is connected between the outer ring of the bearing and the blocking piece.

When the pushing block moves upwards, the restoring force of the return spring is reduced, the pressing force between the baffle plate and the valve block is small, the transformer oil in the compensation oil box can enter the radiating pipe conveniently, when the pushing block moves downwards, the stretched length of the return spring is larger, the restoring force is large, the pressing force between the baffle plate and the valve block is large, the sealing performance is improved, and the structure is favorable for increasing the extrusion pressure and the extrusion efficiency of the oil pump.

The structure such as the micro motor and the valve block is arranged in the compensation oil box, the protection to the parts can be improved, meanwhile, the micro motor only needs a lower rotating speed to realize the faster longitudinal reciprocating motion of the valve block, and the push block is pushed to move downwards in a mode of repelling with the same poles, so that the resistance is smaller, the load of the micro motor is smaller, the service life of the micro motor is prolonged, and the volume and the power of the micro motor are correspondingly smaller.

The temperature control switch is used for controlling a certain driving element, the conventional method is adopted, the micro motor is selectively started, the service life of the micro motor is prolonged, the driving turntable and the driven turntable are made of plastic materials, and the permanent magnet strips I and the permanent magnet strips II are embedded into the driving turntable and the driven turntable.

Drawings

Fig. 1 is a schematic structural diagram of the transformer.

Fig. 2 is a schematic structural diagram of a compensation oil box in the transformer.

Fig. 3 is a schematic structural diagram of the active turntable.

Fig. 4 is a schematic structural diagram of the passive turntable.

In the figure, 1, a fuel tank; 2. a compensation oil box; 21. a one-way valve; 22. a breathing hole; 23. An air bag; 3. a radiating pipe; 41. a micro motor; 42. a guide sleeve; 43. a push block; 44. A valve bore; 45. a baffle plate; 46. a return spring; 47. a temperature control switch; 48. a valve block; 51. an active turntable; 52. a first permanent magnet strip; 61. a passive turntable; 62. and a second permanent magnet strip.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3 and 4, the transformer comprises an oil tank 1, a compensation oil box 2 and a radiating pipe 3, wherein the compensation oil box 2 is fixed on the oil tank 1, the radiating pipe 3 is fixed on the outer wall of the oil tank 1 through a plurality of clamps, a gap is formed between the radiating pipe 3 and the outer wall of the oil tank 1, one end of the radiating pipe 3 is communicated with the bottom of the oil tank 1, the other end of the radiating pipe 3 is connected with the bottom of the compensation oil box 2, the middle part of the compensation oil box 2 is communicated with the top of the oil tank 1 through a connecting pipe, a one-way valve 21 for allowing the transformer oil in the oil tank 1 to enter the compensation oil box 2 is arranged at the connecting part of the compensation oil box 2 and the radiating pipe 3, an oil pump for pressing the transformer oil in the compensation oil box 2 into the radiating pipe 3 is arranged at the connecting part of the compensation oil box 2, a breathing hole 22, the oil pump is located in the compensation oil box 2.

The air bag 23 is used for balancing the pressure in the compensation oil box 2, and is also used for balancing the pressure in the oil tank 1, when the pressure in the oil tank 1 is higher, the transformer oil overflows from the connecting pipe to the compensation oil box 2, and when the pressure in the oil tank 1 is lower, the transformer oil enters the oil tank 1 from the radiating pipe 3.

Through the distribution of cooling tube 3 in 1 side of oil tank or a plurality of sides, utilize the circulation exchange of transformer oil in the oil pump to the transformer oil in compensation oil box 2 and the oil tank 1, make the transformer oil circulation in the oil tank 1 cool off outside oil tank 1, improved heat radiating area greatly, improved thermal conductance efficiency.

The oil pump comprises a micro motor 41, a shell of the micro motor 41 is fixed on the inner wall of the compensation oil box 2, an output shaft of the micro motor 41 is rotatably connected with a guide sleeve 42, the guide sleeve 42 is fixed on the shell of the micro motor 41, a push block 43 is longitudinally and slidably connected on the guide sleeve 42, the guide sleeve 42 is in spline connection with the push block 43, the bottom of the compensation oil box 2 is provided with a valve hole 44, a valve block 48 fixed on the push block 43 is slidably connected in the valve hole 44, a baffle 45 is arranged below the valve block 48, the baffle 45 is connected on the push block 43 through a return spring 46, a liquid outlet hole capable of being shielded by the baffle 45 is formed in the valve block 48, an active turntable 51 is fixedly arranged on the output shaft of the micro motor 41, a passive turntable 61 is fixedly arranged on the push block 43, a plurality of first permanent magnet strips 52 are circumferentially and uniformly distributed on the active turntable 51, second permanent magnet strips 62 which are circumferentially and uniformly distributed on the passive turntable, the lower end of the first permanent magnet strip 52 and the upper end of the second permanent magnet strip 62 are homopolar.

A temperature control switch 47 is arranged in the connecting pipe, and the circuit of the micro motor 41 is conducted when the temperature control switch 47 is turned on. The micro motor 41 is started after the temperature control switch 47 is started, the starting temperature of the temperature control switch 47 is a set value, the cut-off temperature is also a set value, when the temperature reaches the set value, the micro motor 41 drives the driving turntable 51 to rotate, so that the driven turntable 61 which only can move longitudinally is driven to move downwards when the permanent magnet strips one 52 and two 62 which generate repulsive force are aligned, and the driven turntable resets under the action of the reset spring 46, thereby realizing that the micro motor 41 drives the push block 43 to rapidly and longitudinally reciprocate under the condition of slow rotation, enabling the transformer oil in the compensation oil box 2 to be continuously extruded into the radiating pipe 3, and realizing the reciprocating circulation of the transformer oil between the oil tank 1 and the compensation oil box 2.

The push block 43 is provided with a guide hole, the output shaft of the micro motor 41 is connected with the inner wall of the guide hole through a bearing, the outer ring of the bearing is connected with the inner wall of the guide hole through a spline, and the reset spring 46 is connected between the outer ring of the bearing and the blocking piece 45. When the pushing block 43 moves upwards, the restoring force of the return spring 46 is reduced, the pressing force between the blocking piece 45 and the valve block 48 is small, the transformer oil in the compensation oil box 2 can enter the radiating pipe 3 conveniently, when the pushing block 43 moves downwards, the stretched length of the return spring 46 is larger, the restoring force is larger, the pressing force between the blocking piece 45 and the valve block 48 is larger, the sealing performance is improved, and the structure is favorable for increasing the extrusion pressure and the extrusion efficiency of the oil pump.

The structures of the micro motor 41, the valve block 48 and the like are arranged in the compensation oil box 2, the protection to the components can be improved, meanwhile, the micro motor 41 can realize the longitudinal reciprocating motion of the valve block 48 at a high speed only by a low rotating speed, and the pushing block 43 is pushed to move downwards in a mode of homopolar repulsion, so that the resistance is low, the load of the micro motor 41 is low, the service life of the micro motor is prolonged, and the volume and the power of the micro motor are correspondingly low.

The driving element is controlled by the temperature control switch 47 in the conventional way, the micro motor 41 is selectively turned on, the service life of the driving turntable 51 and the driven turntable 61 is prolonged, the driving turntable 52 and the driven turntable 62 are made of plastic materials, and the permanent magnet strips are embedded in the driving turntable 52 and the driven turntable 62.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The oil-immersed transformer is characterized by comprising an oil tank (1), a compensation oil box (2) and a radiating pipe (3), wherein the compensation oil box (2) is fixed on the oil tank (1), the radiating pipe (3) is fixed on the outer wall of the oil tank (1) through a plurality of clamps, a gap is reserved between the radiating pipe (3) and the outer wall of the oil tank (1), one end of the radiating pipe (3) is communicated with the bottom of the oil tank (1), the other end of the radiating pipe (3) is connected with the bottom of the compensation oil box (2), the middle of the compensation oil box (2) is communicated with the top of the oil tank (1) through one check valve (21) which allows transformer oil in the oil tank (1) to enter the compensation oil box (2), an oil pump which can press the transformer oil in the compensation oil box (2) into the radiating pipe (3) is arranged at the joint of the compensation oil box (2) and the radiating pipe (3), have one on compensation oil box (2) and connect external breathing hole (22), be provided with gasbag (23) of keeping out and close breathing hole (22) in compensation oil box (2), the oil pump is located compensation oil box (2).

2. The oil-immersed transformer according to claim 1, wherein the oil pump comprises a micro motor (41), a housing of the micro motor (41) is fixed on an inner wall of the compensation oil box (2), an output shaft of the micro motor (41) is rotatably connected with a guide sleeve (42), the guide sleeve (42) is fixed on the housing of the micro motor (41), the guide sleeve (42) is longitudinally and slidably connected with a push block (43), the guide sleeve (42) is in spline connection with the push block (43), a valve hole (44) is formed in the bottom of the compensation oil box (2), a valve block (48) fixed on the push block (43) is slidably connected in the valve hole (44), a blocking piece (45) is arranged below the valve block (48), the blocking piece (45) is connected to the push block (43) through a return spring (46), a liquid outlet hole capable of being blocked by the liquid outlet hole (45) is formed in the valve block (48), an active turntable (51) is fixedly arranged on an output shaft of the micro motor (41), a passive turntable (61) is fixedly arranged on the push block (43), a plurality of permanent magnet strips I (52) are uniformly distributed on the active turntable (51) in the circumferential direction, permanent magnet strips II (62) which correspond to the permanent magnet strips I (52) one by one are uniformly distributed on the passive turntable (61) in the circumferential direction, and the lower ends of the permanent magnet strips I (52) and the upper ends of the permanent magnet strips II (62) have the same polarity.

3. Oil filled transformer according to claim 2, characterized in that a temperature controlled switch (47) is arranged in the connection tube, and the electric circuit of the micro motor (41) is conducted when the temperature controlled switch (47) is turned on.

4. The oil-immersed transformer of claim 2, wherein the push block (43) is provided with a guide hole, the output shaft of the micro motor (41) is connected with the inner wall of the guide hole through a bearing, the outer ring of the bearing is connected with the inner wall of the guide hole through a spline, and the return spring (46) is connected between the outer ring of the bearing and the blocking piece (45).