CN221262101U - Double-oil-chamber transformer with semi-closed partition plate structure - Google Patents

Abstract

The present disclosure provides a double-oil-chamber transformer of a semi-closed partition structure, comprising: a transformer housing (1) having an internal space and a partition plate (11) provided in the internal space, the partition plate (11) partitioning the internal space of the transformer housing (1) to form a switching oil chamber (12) and a main body oil chamber (13); a switch (2) provided in the switching oil chamber (12); the transformer main body (3) is arranged in the main body oil chamber (13) and comprises a transformer coil (31) and a transformer iron core (32), and is characterized in that the partition board (11) is a semi-closed partition board, so that the upper part of the switching oil chamber (12) and the upper part of the main body oil chamber (13) are communicated through a communication channel (18). The transformer is simple in structure and enables connection operation of the voltage regulating lead wires and vacuum oiling operation to be more convenient and rapid.

Description

Double-oil-chamber transformer with semi-closed partition plate structure

Technical Field

The disclosure belongs to the technical field of oil immersed transformers, and relates to a double-oil-chamber transformer with a semi-closed partition plate structure.

Background

An oil-immersed transformer generally includes a transformer housing, a transformer body (or referred to as a transformer body) disposed in the transformer housing, and a switch for performing a voltage regulating operation, and a voltage regulating lead wire is led out from a transformer coil and then connected to the switch.

An integral oil chamber is formed in a transformer shell of the oil immersed transformer, and a transformer main body and a transformer switch are arranged in the integral oil chamber. The outside of the transformer shell is also provided with an oil storage cabinet communicated with the integral oil chamber so as to carry out vacuum oil injection and oil discharge operation during maintenance. In the structure of the integral oil chamber, since the switch and the transformer main body are both positioned in one integral oil chamber, if the switch needs to be overhauled, the oil in the integral oil chamber needs to be discharged completely, the main body is lifted out together with the switch, the workload is large, and the transformer main body is exposed to the air to absorb moisture and the like due to the fact that the oil is discharged, so that the subsequent maintenance operation process is influenced, for example, the main body also needs to complete the process flows of deoiling, re-drying and the like, and the period is long.

In order to solve the technical problem, a double-oil-chamber transformer appears in the prior art. Referring to fig. 1 and 2, there are shown schematic structural views of two existing double oil chamber transformers. In the transformer of fig. 1, a totally enclosed partition 11 made of insulating material is provided in the transformer housing, dividing the internal oil chamber into two completely independent oil chambers, namely a switching oil chamber 12 for accommodating the switch 2 and a main oil chamber 13 for accommodating the transformer main body 3. A plurality of wall bushings 11a are provided on the partition 11 for passing the voltage regulating leads through the partition 11 to electrically connect the voltage regulating leads between the switch 12 and the transformer main body 13. Unlike the transformer shown in fig. 1, in the transformer shown in fig. 2, a plurality of connection terminals 11b are provided on the partition 11, and the voltage regulating leads in the two oil chambers are connected to the connection terminals, respectively, so that the voltage regulating leads are electrically connected between the switch 12 and the transformer main body 13.

In these prior art double-oil-chamber transformers, when the switch is inspected, the oil in the whole oil chamber is not required to be discharged, but only the oil in the switch oil chamber is required to be discharged. The transformer main body is still fully immersed in the main body oil chamber and is not affected by switch maintenance.

However, since the two oil chambers are completely independent, two corresponding oil reservoirs outside the transformer shell are respectively communicated with the two oil chambers, so that operations such as vacuum oil injection and the like can be performed on the two oil chambers.

Moreover, since the two oil chambers are independent of each other, the evacuation operation needs to be performed separately, and the pressure balance problem on both sides needs to be considered, and accordingly, the mechanical strength of the partition plate itself needs to be considered to resist the negative pressure influence during the evacuation operation. Is required and the resulting mechanical strength problem.

In addition, since the fully-enclosed partition plate is adopted between the transformer oil chamber and the switch, the voltage regulating lead wire led out from the transformer main body can be connected with the switch only through the wall bushing or the connecting terminal arranged on the partition plate.

Moreover, because the fully-closed partition plate is adopted between the transformer oil chamber and the switch, the voltage regulating lead wire led out from the transformer main body can be connected with the switch only through the wall bushing or the connecting terminal arranged on the partition plate, and the voltage regulating lead wire can be connected only after the switch and the transformer main body are respectively placed into the switch oil chamber and the main body oil chamber, so that the connection operation is relatively inconvenient.

Disclosure of utility model

The technical problem to be solved by the present disclosure is to provide a double-oil-chamber transformer with a semi-closed partition structure, so that the connection operation of the voltage-regulating lead wire and the vacuum oiling operation are more convenient and faster.

To solve the above technical problem, the present disclosure provides a double-oil-chamber transformer with a semi-closed partition structure, comprising: a transformer housing having an inner space and a partition disposed in the inner space, the partition partitioning the inner space of the transformer housing to form a switching oil chamber and a main body oil chamber; a switch provided in the switching oil chamber; the transformer main body is arranged in the main body oil chamber and comprises a transformer coil and a transformer iron core, and is characterized in that the partition plate is a semi-closed partition plate, so that the upper part of the switch oil chamber is communicated with the upper part of the main body oil chamber through a communication channel.

According to the transformer, the semi-closed partition plate is adopted to form the communication channel, so that the voltage regulating lead led out from the transformer main body in the main body oil chamber can directly cross the partition plate to enter the switch oil chamber, the partition plate is not required to be provided with the wall bushing or the insulating terminal, connection with the switch can be realized, and the transformer is simpler in structure and more convenient in connection operation. In addition, when the vacuum oiling is performed, as the two oil chambers are communicated through the communication channel, the vacuum oiling can be completed at one time, the vacuum oiling is not required to be performed on two sides respectively, and the quick oiling operation is convenient. In addition, the separator does not need to withstand vacuum and lateral pressure due to pressure imbalance, so that the thickness dimension of the separator and the reinforcing ribs of the separator can be reduced, thereby reducing the material cost.

Further, the height of the partition plate is set so that the communication passage is formed between the top of the partition plate and the housing top wall of the transformer housing.

Because the communication channel is directly formed between the baffle and the top wall of the shell, compared with a totally-enclosed baffle, the height and the size of the baffle are smaller, and materials are saved.

Further, the top of the partition plate is higher than the top of the transformer coil, so that the oil level in the main body oil chamber is not lower than the top of the transformer coil when the switching oil chamber discharges oil.

By setting the top of the partition plate higher than the top of the transformer coil, it is ensured that the insulation of the transformer coil is always immersed in the insulation oil of the main body oil chamber when the switch maintenance is performed, and insulation risk due to exposure to air is avoided.

Further, the separator is a metal separator. The adoption of the metal partition plate can enable the distance between the switch and the transformer main body to be smaller, the whole structure is more compact, and the production is more convenient.

Further, a cooling oil pipe is further arranged on the transformer shell, the cooling oil pipe extends in the switching oil chamber, one end of the cooling oil pipe penetrates through the partition plate from the switching oil chamber to be communicated with the main oil chamber, and the other end of the cooling oil pipe penetrates through the shell side wall of the transformer shell, which is positioned at the end part of the shell, to the outside from the switching oil chamber to be communicated with a radiator.

Through setting up the cooling oil pipe that extends in the switch oil chamber, can realize cooling the insulating oil in the switch oil chamber when cooling down the insulating oil in the main part oil chamber through the cooling oil, simple structure, the cooling effect is good.

Further, the transformer body includes a transformer coil and a transformer core; the height position of the cooling oil pipe is in the height range of the transformer coil.

This configuration makes the cooling oil pipe can more directly carry out the heat exchange to the insulating oil around the transformer coil, and the cooling effect is better.

Further, the transformer of the present disclosure further includes a main body oil chamber oil reservoir tank disposed outside the transformer housing and in communication with the main body oil chamber, and does not include a switching oil chamber oil reservoir tank disposed outside the transformer housing and in communication with the switching oil chamber.

Because the switch oil chamber is communicated with the main oil chamber, the transformer can realize the vacuum oiling operation of the main oil chamber and the switch oil chamber through the main oil chamber oil storage cabinet which is arranged outside the transformer shell and is communicated with the main oil chamber, the switch oil chamber oil storage cabinet which is communicated with the switch oil chamber is not required, and the material cost is reduced.

Further, a switch mounting flange is arranged on the top wall of the transformer shell; the switch is mounted to the switch mounting flange.

Through setting up switch mounting flange for the installation of switch is more convenient, connects more reliably.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the present disclosure, and together with the description serve to explain the present disclosure. In the drawings:

FIG. 1 is a schematic diagram of a prior art double-oil-chamber transformer of a fully enclosed diaphragm construction;

FIG. 2 is a schematic structural view of a double-oil-chamber transformer of another fully-enclosed partition structure of the prior art;

FIG. 3 is a schematic diagram of a cross-sectional front view of a dual oil chamber transformer of a semi-enclosed diaphragm structure in accordance with one embodiment of the present disclosure;

FIG. 4 is a schematic top view of the transformer of FIG. 3 with a top wall of the housing removed to show the internal structure;

fig. 5 is a left-hand cross-sectional structural schematic view of the transformer shown in fig. 3.

Reference numerals illustrate:

1. a transformer housing; 11. A partition plate; 11a, wall bushing;

11b, connection terminals; 12. A switching oil chamber; 13. A main body oil chamber;

14. A cooling oil pipe; 15. A housing top wall; 16. A bottom wall of the housing;

17. a housing sidewall; 18. A communication passage; 19. A switch mounting flange;

2. A switch;

3. a transformer body; 31. A transformer coil; 32. A transformer core;

4. and (5) regulating voltage leads.

Detailed Description

The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present disclosure. As used herein, the singular is intended to include the plural unless the context clearly indicates otherwise.

FIG. 3 is a schematic diagram of a cross-sectional front view of a dual oil chamber transformer of a semi-enclosed diaphragm structure in accordance with one embodiment of the present disclosure; FIG. 4 is a schematic top view of the transformer of FIG. 3 with a top wall of the housing removed to show the internal structure; fig. 5 is a left-hand cross-sectional structural schematic view of the transformer shown in fig. 3.

Referring to fig. 3 to 5, the double-oil-chamber transformer of a semi-closed partition structure according to one embodiment of the present disclosure includes a transformer housing 1 having an inner space and a partition 11 disposed in the inner space, the partition 11 partitioning the inner space of the transformer housing 1, forming a switching oil chamber 12 and a main body oil chamber 13. The transformer further comprises a switch 2 provided in the switching oil chamber 12 and a transformer body 3 provided in the main body oil chamber 13, the transformer body 3 comprising a transformer coil 31 and a transformer core 32. As can be seen from fig. 3 and 5, the partition 11 is a semi-closed partition such that the upper portion of the switching oil chamber 12 and the upper portion of the main body oil chamber 13 are communicated with each other through the communication passage 18.

The semi-closed partition plate is adopted to form the communication channel, so that the voltage regulating lead 4 led out from the transformer main body 3 positioned in the main body oil chamber 13 can directly enter the switch oil chamber 12 across the partition plate 11, the partition plate 11 is not required to be provided with a wall bushing or an insulating terminal, the connection with the switch 2 can be realized, and the structure is simpler and the connection operation is more convenient. In addition, during vacuum oil injection, since the two oil chambers (namely the switch oil chamber 12 and the main oil chamber 13) are communicated through the communication channel 18, vacuum oil injection can be completed at one time, and the two oil chambers are not required to be respectively subjected to vacuum oil injection, so that quick oil injection operation is facilitated. In addition, the separator 11 does not need to withstand vacuum and lateral pressure due to pressure imbalance, so that the thickness dimension of the separator 11 and the reinforcing ribs of the separator can be reduced, thereby reducing material costs.

With continued reference to fig. 3 and 5, the height of the partition 11 is set such that a communication channel 18 is formed between the top of the partition 11 and the housing top wall 15 of the transformer housing 1.

Since the communication channel 18 is formed directly between the partition 11 and the housing top wall 15, the semi-enclosed partition of the present disclosure is smaller in height dimension and saves materials as compared to a fully enclosed partition.

As can also be seen from fig. 3 and 5, the top of the partition 11 is higher than the top of the transformer coil 31, so that the oil level in the main body oil chamber 12 is not lower than the top of the transformer coil 31 when the switching oil chamber 12 discharges oil.

By setting the top of the partition plate 11 to be higher than the top of the transformer coil 31, it is possible to ensure that the insulating oil in the main body oil chamber 13 can only be discharged to a level with the top of the partition plate 11 at the time of switching maintenance, so that the insulating member of the transformer coil 31 can be always immersed in the insulating oil of the main body oil chamber 13, avoiding the risk of insulation failure due to exposure to air.

In addition, preferably, according to one embodiment of the present disclosure, the separator 11 is a metal separator. By adopting the metal partition plate, the distance between the switch 2 and the transformer main body 3 can be smaller, the whole structure is more compact, and the production is more convenient.

With continued reference to fig. 3 to 5, it can be seen that the transformer housing 1 is further provided with a cooling oil pipe 14, the cooling oil pipe 14 extending within the switching oil chamber 12, one end of the cooling oil pipe 14 passing through the partition 11 from the switching oil chamber 12 to communicate with the main body oil chamber 13, and the other end of the cooling oil pipe 14 extending from the switching oil chamber 12 to the outside through a housing side wall 17 at the housing end of the transformer housing 1 to communicate with a radiator.

The cooling oil pipe 14 extending in the switching oil chamber 12 can cool the insulating oil in the main body oil chamber 13 by the cooling oil, and can cool the insulating oil in the switching oil chamber 12, so that the structure is simple and the cooling effect is good.

In this embodiment of the present disclosure, the main body oil chamber 13 communicates with the external radiator through a circulation pipe. The circulation pipes include an upper circulation pipe and a lower circulation pipe. The cooling oil pipe 14 shown in fig. 3 to 5 is a part of a circulation pipe, and is a lower circulation pipe. The upper circulation duct is not shown in fig. 3 to 5. As can be seen from fig. 3 to 5, two cooling oil pipes 14 are provided, each extending along the inner side of two parallel arranged housing side walls. This allows the insulating oil inside the main oil pipe 13 to be cooled more effectively.

It can also be seen from fig. 3 and 5 that the height position of the cooling oil pipe 14 is within the height range of the transformer coil 31.

This configuration can enable the cooling oil pipe 14 to more directly exchange heat with the insulating oil around the transformer coil 31, with a better cooling effect.

In addition, the transformer of the present disclosure may further include a main body oil chamber oil reservoir (not shown) provided outside the transformer housing 1 in communication with the main body oil chamber 13, but not include a switching oil chamber oil reservoir provided outside the transformer housing 1 in communication with the switching oil chamber 12.

In the present disclosure, because the switching oil chamber 12 is communicated with the main oil chamber 13, the vacuum oil injection operation of the main oil chamber 13 and the switching oil chamber 12 can be realized through the main oil chamber oil reservoir communicated with the main oil chamber 13, which is arranged outside the transformer shell 1, without arranging the switching oil chamber oil reservoir communicated with the switching oil chamber 12, so that the material cost is reduced.

In addition, as can be seen from fig. 3 to 5, a switch mounting flange 19 is provided on the housing top wall 15 of the transformer housing 1. The switch 2 is mounted to a switch mounting flange 19. The bottom of the switch 2 is located a distance above the bottom wall 16 of the housing.

By providing the switch mounting flange 19, the switch 2 is more convenient to mount and more reliable to connect.

The technical effect of the scheme of the present disclosure is that:

1. The voltage regulating lead spans the semi-closed partition board to realize connection of the switch and the transformer main body, and for connection operation of the voltage regulating lead, the fully-closed partition board does not exist to completely isolate the switch oil chamber and the main body oil chamber, so that connection can be completed outside the transformer shell, and then the connected switch and the transformer main body are respectively placed into the switch oil chamber and the main body oil chamber, thereby being convenient for connection operation and improving production efficiency.

2. In terms of insulation distance versus space requirements, the present disclosure preferably employs metal spacers, which may enable a smaller distance between the switch and the transformer body, a more compact overall structure, and more convenient production, and lower cost compared to existing expensive and structurally complex spacers (insulation spacers).

3. When the transformer disclosed by the invention is used for carrying out vacuum oiling operation, the two oil chambers are communicated through the upper sides of the partition plates, so that vacuum oiling can be completed once, the two sides are not required to be respectively subjected to vacuum oiling, and the thickness dimension of the partition plates can be reduced because the partition plates are not required to bear vacuum (do not bear side pressure caused by unbalanced pressure).

4. Compared with the transformer adopting the totally-enclosed partition plate structure with the wall bushing or the connecting terminal in the prior art, the transformer has the advantages that the design of the transformer shell is simplified, the length of the transformer shell is reduced, the overall dimension of the transformer is reduced, the whole transformer is more compact, the size of an oil chamber is reduced, and the required insulating oil quantity of the transformer can be reduced.

The foregoing is merely a preferred embodiment of the present disclosure and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present disclosure and are intended to be comprehended within the scope of the present disclosure.

Claims (8)

1. A double oil chamber transformer of semi-closed partition structure comprising:

A transformer housing (1) having an internal space and a partition plate (11) provided in the internal space, the partition plate (11) partitioning the internal space of the transformer housing (1) to form a switching oil chamber (12) and a main body oil chamber (13);

a switch (2) provided in the switching oil chamber (12);

a transformer main body (3) disposed in the main body oil chamber (13) and including a transformer coil (31) and a transformer core (32),

The oil pump is characterized in that the partition plate (11) is a semi-closed partition plate, so that the upper part of the switch oil chamber (12) and the upper part of the main oil chamber (13) are communicated through a communication channel (18).

2. The transformer according to claim 1, wherein the transformer comprises a transformer,

The height of the partition plate (11) is set so that the communication passage (18) is formed between the top of the partition plate (11) and the housing top wall (15) of the transformer housing (1).

3. A transformer according to claim 2, wherein,

The top of the partition plate (11) is higher than the top of the transformer coil (31) so that the oil level in the main body oil chamber (12) is not lower than the top of the transformer coil (31) when the switching oil chamber (12) discharges oil.

4. The transformer according to claim 1, wherein the transformer comprises a transformer,

The partition board (11) is a metal partition board.

5. The transformer according to claim 1, wherein the transformer comprises a transformer,

The transformer housing (1) is further provided with a cooling oil pipe (14), the cooling oil pipe (14) extends in the switching oil chamber (12), one end of the cooling oil pipe passes through the partition plate (11) from the switching oil chamber (12) to be communicated with the main oil chamber (13), and the other end of the cooling oil pipe passes through the housing side wall (17) of the transformer housing (1) at the end of the housing to be communicated with a radiator.

6. The transformer according to claim 5, wherein the transformer comprises a transformer,

The height position of the cooling oil pipe (14) is within the height range of the transformer coil (31).

7. The transformer according to claim 1, further comprising a main body oil chamber oil reservoir arranged outside the transformer housing (1) in communication with the main body oil chamber (13), excluding a switching oil chamber oil reservoir arranged outside the transformer housing (1) in communication with the switching oil chamber (12).

8. The transformer according to claim 1, wherein the transformer comprises a transformer,

A switch mounting flange (19) is arranged on the top wall (15) of the transformer shell (1);

the switch (2) is mounted to the switch mounting flange (19).