Natural ester transformer oil conservator

Abstract

A natural ester transformer oil conservator comprises a body oil conservator and a body oil conservator capsule arranged in the body oil conservator; the body oil conservator capsule is communicated with a body breather through a first main pipeline, and a valve A1 is arranged on the first main pipeline; the upper part of the body oil conservator is communicated with an external environment through a second main pipeline, and a valve A3 is arranged on the second main pipeline; the body oil conservator is communicated with a third main pipeline, and insulating oil enters or is discharged from the body oil conservator through the third main pipeline, and a valve A9 is arranged on the third main pipeline; the part of the first main pipeline between the valve A1 and the body oil conservator conservator capsule is communicated with the part of the third main pipeline between the valve A9 and the body oil conservator through a fourth main pipeline, and a valve A7 is arranged on the fourth main pipeline, so that the natural ester transformer oil conservator can balance the pressure inside the transformer during installation, transportation, maintenance and operation, and has good safety and simple operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power transformers, in particular to a natural ester transformer oil conservator. BACKGROUND

[0002] Most of the existing natural ester insulation oil transformers, the natural ester transformer oil conservator is difficult to achieve the balance of various pressures inside the transformer during installation, transportation, maintenance and operation, and there is no mature solution to systematically handle the demand for pressure balance of the natural ester insulation oil transformer conservator during installation, transportation, maintenance and operation. The natural ester insulation oil transformer capable of achieving the balance of part of the pressure inside the transformer has defects such as dispersion, waste and redundancy, resulting in complex operation, increased instability and insecurity. SUMMARY

[0003] The present application aims to overcome the defects of the prior art and provide a natural ester transformer oil conservator which can achieve the pressure balance inside the transformer in various working states, and is safe and easy to operate.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] A natural ester transformer oil conservator comprises a body oil conservator and a body oil conservator capsule arranged in the body oil conservator; the body oil conservator capsule is communicated with a body breather through a first main pipeline, and a valve A1 is arranged on the first main pipeline; the upper part of the body oil conservator is communicated with the external environment through a second main pipeline, and a valve A3 is arranged on the second main pipeline; the body oil conservator is communicated with a third main pipeline, and insulation oil enters or is discharged from the body oil conservator through the third main pipeline, and a valve A9 is arranged on the third main pipeline; the part of the first main pipeline between the valve A1 and the body oil conservator capsule is communicated with the part of the third main pipeline between the valve A9 and the body oil conservator through a fourth main pipeline, and a valve A7 is arranged on the fourth main pipeline.

[0006] Preferably, when the natural ester transformer oil conservator is transported, the valve A1, the valve A3 and the valve A9 are closed, and the valve A7 is opened; when the body oil conservator is vacuumized, the valve A3 and the valve A7 are opened, and the valve A1 and the valve A9 are closed; when the body oil conservator is filled with insulation oil or discharged from insulation oil, the valve A3 and the valve A7 are closed, and the valve A1 and the valve A9 are opened; when the transformer is normally operated, the valve A3, the valve A7 and the valve A9 are closed, and the valve A1 is opened; when the transformer is maintained, the valve A7 and the valve A9 are closed, and the valve A1 and the valve A3 are opened.

[0007] Preferably, one end of the first main pipeline is communicated with the body oil conservator capsule, the other end is communicated with one end of the valve A1, the other end of the valve A1 is communicated with the body breather, one end of the second main pipeline is communicated with the top of the body oil conservator, the other end is provided with the valve A3, one end of the third main pipeline is communicated with the bottom of the body oil conservator, the other end is provided with the valve A9, one end of the fourth main pipeline is communicated with the first main pipeline, the other end is communicated with the third main pipeline, the middle part is provided with the valve A7.

[0008] Preferably, the body oil conservator is further provided with a first oil level gauge for detecting the oil level in the body oil conservator.

[0009] Preferably, the body oil conservator is further provided with a first oil level gauge for detecting the oil level in the body oil conservator.

[0010] Preferably, the body oil conservator is further provided with a first oil level gauge for detecting the oil level in the body oil conservator.

[0011] Preferably, the body oil conservator is further provided with a first oil level gauge for detecting the oil level in the body oil conservator.

[0012] Preferably, one end of the first sub-pipeline is communicated with the load switch oil conservator capsule, the other end is communicated with one end of the valve A2, the other end of the valve A2 is communicated with the load switch breather, one end of the second sub-pipeline is communicated with the top of the load switch oil conservator, the other end is communicated with the valve A4, one end of the third sub-pipeline is communicated with the bottom of the load switch oil conservator, the other end is communicated with the valve A8, one end of the bridge pipeline is communicated with the first sub-pipeline, the other end is communicated with the third main pipeline, and the valve A5 and the valve A6 are sequentially arranged between the first sub-pipeline and the third main pipeline.

[0013] Preferably, the load switch oil conservator is further provided with a second oil level gauge for detecting the oil level in the load switch oil conservator.

[0014] Preferably, the bottom of the body oil conservator is communicated with the transformer body oil tank, and the bottom of the load switch oil conservator is communicated with the load switch oil tank.

[0015] The natural ester transformer oil conservator can meet the requirements of various working states of the transformer through the opening and closing combination of the valves A1, A3, A7 and A9, a new pressure balance method of the natural ester transformer oil conservator is provided by using the pressure balance system composed of multiple valves, and the safety factor of the transformer during installation and operation is further improved, for example, the body oil conservator capsule is prevented from being damaged due to internal pressure imbalance, and the structure is simple and the cost is low.

[0016] The natural ester transformer oil conservator can realize the pressure balance of the transformer inside during installation, transportation, maintenance and operation through the opening and closing combination of the valves A1-A9.

[0017] In addition, the natural ester transformer oil conservator can also prevent the load switch oil tank communicated with the load switch oil conservator from being broken and the load switch oil conservator capsule from being damaged due to internal pressure imbalance through the opening and closing combination of the valves A1-A9. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a first embodiment structure schematic view of the natural ester transformer oil conservator of the application;

[0019] Figure 2 is a second embodiment structure schematic view of the natural ester transformer oil conservator of the application;

[0020] Figure 3 is a structure schematic view of the existing load switch head flange. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings Figures 1-2The given embodiments further illustrate specific implementations of the natural ester transformer oil conservator of the present invention. The natural ester transformer oil conservator of the present invention is not limited to the descriptions in the following embodiments.

[0022] The present invention relates to a natural ester transformer oil conservator, comprising a main oil conservator 2 and a main oil conservator capsule 1 disposed within the main oil conservator 2; the main oil conservator capsule 1 is connected to a main body breather 6 via a first main pipeline 21, and a valve A1 is provided on the first main pipeline 21; the upper part of the main oil conservator 2 is connected to the external environment via a second main pipeline 22, and a valve A3 is provided on the second main pipeline 22; the main oil conservator 2 is connected to a third main pipeline 23, through which insulating oil enters or exits the main oil conservator 2, and a valve A9 is provided on the third main pipeline 23; the portion of the first main pipeline 21 located between valve A1 and the main oil conservator capsule 1 is connected to the portion of the third main pipeline 23 located between valve A9 and the main oil conservator 2 via a fourth main pipeline 24, and a valve A7 is provided on the fourth main pipeline 24.

[0023] The natural ester transformer oil conservator of the present invention, through the opening and closing combination of valves A1, valve A3, valve A7 and valve A9, can meet the needs of various working states of the transformer. The pressure balancing system composed of multiple valves provides a brand-new pressure balancing method for natural ester transformer oil conservators, which further improves the safety factor of the transformer during installation and operation, such as preventing damage to the main body oil conservator capsule caused by internal pressure imbalance. Moreover, it has a simple structure and low cost.

[0024] Preferred, such as Figure 1 As shown, when the natural ester transformer oil conservator is transported, valves A1, A3, and A9 are closed, and valve A7 is open; when the main body oil conservator 2 is evacuated, valves A1 and A9 are closed, and valves A3 and A7 are open, with valve A3 used to evacuate the main body oil conservator 2; when insulating oil is injected into or released from the main body oil conservator 2, valves A3 and A7 are closed, and valves A1 and A9 are open; when the transformer is operating normally, valves A3, A7, and A9 are closed, and valve A1 is open; when the transformer is under maintenance, valves A7 and A9 are closed, and valves A1 and A3 are open.

[0025] Preferably, the natural ester transformer oil conservator of the present application further comprises a load switch oil conservator 4 and a load switch oil conservator capsule 3 arranged in the load switch oil conservator 4; the load switch oil conservator capsule 3 is communicated with a load switch breather 5 through a first auxiliary pipeline 41, and a valve A2 is arranged on the first auxiliary pipeline 41; the upper part of the load switch oil conservator 4 is communicated with the external environment through a second auxiliary pipeline 42, and a valve A4 is arranged on the second auxiliary pipeline 42; the bottom of the load switch oil conservator 4 is communicated with a third auxiliary pipeline 43, and the insulating oil enters or discharges the load switch oil conservator 4 through the third auxiliary pipeline 43, and a valve A8 is arranged on the third auxiliary pipeline 43; the part of the first auxiliary pipeline 41 between the valve A2 and the load switch oil conservator capsule 3 is communicated with the part of the third main pipeline 23 between a valve A9 and the body oil conservator 2 through a bridge pipeline 2-4; the bridge pipeline 2-4 is sequentially provided with a valve A5 and a valve A6 connected between the first auxiliary pipeline 41 and the third main pipeline 23, and the part of the third main pipeline 43 between the valve A8 and the load switch oil conservator 4 is communicated with the part of the bridge pipeline 2-4 between the valve A5 and the valve A6.

[0026] Preferably, the bottom of the body oil conservator 2 is communicated with a transformer body oil tank, and the bottom of the load switch oil conservator 4 is communicated with a load switch oil tank.

[0027] The natural ester transformer oil conservator of the present application can also prevent the load switch oil tank communicated with the load switch oil conservator from being broken and the load switch oil conservator capsule from being damaged due to internal pressure imbalance. Further, as shown in Figure 3 The natural ester transformer oil conservator of the present application has connected the oil chamber of the load switch and the oil chamber of the transformer body with the oil conservator through the pipe joint S of the load switch head flange, and connected them with the transformer body oil conservator through the valves A5 and A6, so that the pressure balance is achieved, and the pressure balance can also be well achieved when the transformer is normally electrified, thus the pipe joint E2 of the load switch head flange and the design of the connection between the pipe joint E2 and the transformer body oil tank can be omitted, thereby simplifying the number of pipe joints of the load switch head flange and the operation, and improving the safety.

[0028] Preferably, when the natural ester transformer oil conservator is transported, the valve A1, the valve A2, the valve A3, the valve A4, the valve A6, the valve A8 and the valve A9 are closed, and the valve A5 and the valve A7 are opened; when the body oil conservator 2 and the load switch oil conservator 4 are vacuumized, Figure 2Valve A1, valve A2, valve A8, and valve A9 are closed, while valves A3, valve A4, valve A5, valve A6, and valve A7 are open. Valve A3 and valve A4 are used to evacuate the main body oil reservoir 2 and the on-load switch oil reservoir 4, respectively. Valve A5 and valve A6 are used to balance the pressure between the on-load switch oil reservoir and the main body oil reservoir. Valve A7 is used to balance the pressure between capsule 1 and the main body oil reservoir 2. When insulating oil is injected into or released from the main body oil reservoir 2 and the on-load switch oil reservoir 4, the valves... Door A3, valves A4, A5, A6, and A7 are closed, while valves A1, A2, A8, and A9 are open. During normal operation of the transformer, valves A3, A4, A5, A6, A7, A8, and A9 are closed, while valves A1 and A2 are open. When the transformer is under maintenance, valves A5, A6, A7, A8, and A9 are closed, while valves A1, A2, A3, and A4 are open.

[0029] It should be noted that the natural ester transformer oil conservator of the present invention is part of an oil-immersed transformer, and is preferably used in a natural ester insulating oil transformer.

[0030] like Figure 1 The image shows a first embodiment of the natural ester transformer oil storage tank of the present invention.

[0031] The natural ester transformer oil conservator of this embodiment includes a main oil conservator 2 and a main oil conservator capsule 1 disposed within the main oil conservator 2. The main oil conservator capsule 1 is connected to the main body breather 6 via a first main pipeline 21, and a valve A1 is provided on the first main pipeline 21. The upper part of the main oil conservator 2 is connected to the external environment via a second main pipeline 22, and a valve A3 is provided on the second main pipeline 22. The main oil conservator 2 is connected to a third main pipeline 23, through which insulating oil enters or exits the main oil conservator 2, and a valve A9 is provided on the third main pipeline 23. The portion of the first main pipeline 21 located between valve A1 and the main oil conservator capsule 1 is connected to the portion of the third main pipeline 23 located between valve A9 and the main oil conservator 2 via a fourth main pipeline 24, and a valve A7 is provided on the fourth main pipeline 24.

[0032] Preferred, such as Figure 1 As shown, one end of the first main pipeline 21 is connected to the main body oil tank capsule 1, and the other end is connected to one end of valve A1, the other end of which is connected to the main body breather 6; one end of the second main pipeline 22 is connected to the top of the main body oil tank 2, and the other end is equipped with valve A3; one end of the third main pipeline 23 is connected to the bottom of the main body oil tank 2, and the other end is equipped with valve A9; one end of the fourth main pipeline 24 is connected to the first main pipeline 21, and the other end is connected to the third main pipeline 23, with valve A7 in the middle. Specifically, as... Figure 1The first main pipeline 21 is in inverted L shape structure as a whole, the upper end is communicated with the body oil storage tank capsule 1, the lower end is communicated with the body breather 6 through the valve A1, the body breather 6 is communicated with the external environment, and air can enter or be discharged from the body oil storage tank capsule 1 through the body breather 6 and the valve A1; the second main pipeline 22 is in inverted L shape structure as a whole, the upper end is fixedly connected with the top wall of the body oil storage tank 2 and communicated with the inside of the body oil storage tank 2, and the lower end is provided with the valve A3; air can enter or be discharged from the body oil storage tank 2 through the valve A3; the third main pipeline 23 is fixedly connected with the bottom wall of the body oil storage tank 2 and communicated with the inside of the body oil storage tank 2, and the lower end is provided with the valve A9; the insulating oil (mineral insulating oil or natural ester insulating oil) is injected into or discharged from the body oil storage tank 2 through the valve A9; the fourth main pipeline 24 is communicated with the first main pipeline 21 at the left end and communicated with the third main pipeline 23 at the right end, and the valve A7 is arranged on the fourth main pipeline 24; by closing / opening the valve A7, the pressure between the body oil storage tank 2 and the body oil storage tank capsule 1 can be balanced, and the body oil storage tank capsule 1 can be prevented from being damaged.

[0033] Preferably, as shown in the drawings, Figure 1 The body oil storage tank 2 is further provided with a first oil level gauge for detecting the oil level in the body oil storage tank 2. Figure 1 The first oil level gauge is arranged at the lower right corner of the body oil storage tank 2.

[0034] Preferably, the bottom of the body oil storage tank 2 is communicated with the transformer body oil tank.

[0035] When the natural ester transformer oil storage tank of the embodiment is in the following five states, the combination of opening or closing of the valve A1, the valve A3, the valve A7 and the valve A9 is used to balance the internal pressure of the natural ester transformer oil storage tank, and the specific states are as follows: when the natural ester transformer oil storage tank is transported (followed by the transformer), the valve A1, the valve A3 and the valve A9 are closed, and the valve A7 is opened; when the body oil storage tank 2 is vacuumized, the valve A1 and the valve A9 are closed, the valve A3 and the valve A7 are opened, and the body oil storage tank 2 is vacuumized through the valve A3; when the body oil storage tank 2 is injected with insulating oil or discharged from the insulating oil, the valve A3 and the valve A7 are closed, and the valve A1 and the valve A9 are opened; when the transformer is normally operated, the valve A3, the valve A7 and the valve A9 are closed, and the valve A1 is opened; when the transformer is overhauled, the valve A7 and the valve A9 are closed, and the valve A1 and the valve A3 are opened.

[0036] As shown in the drawings, Figure 2 The second embodiment of the natural ester transformer oil storage tank of the application is shown.

[0037] The natural ester transformer oil conservator of the embodiment is different from the first embodiment in that it further comprises a load switch oil conservator 4 and a load switch oil conservator capsule 3 arranged in the load switch oil conservator 4. The load switch oil conservator capsule 3 is in communication with a load switch breather 5 through a first auxiliary pipeline 41, and a valve A2 is arranged on the first auxiliary pipeline 41. The upper part of the load switch oil conservator 4 is in communication with the external environment through a second auxiliary pipeline 42, and a valve A4 is arranged on the second auxiliary pipeline 42. The bottom of the load switch oil conservator 4 is in communication with a third auxiliary pipeline 43, and the insulating oil enters or is discharged from the load switch oil conservator 4 through the third auxiliary pipeline 43, and a valve A8 is arranged on the third auxiliary pipeline 43. The part of the first auxiliary pipeline 41 between the valve A2 and the load switch oil conservator capsule 3 is in communication with the part of the third main pipeline 23 between a valve A9 and the body oil conservator 2 through a bridge pipeline 2-4. The valve A5 and the valve A6 connected between the first auxiliary pipeline 41 and the third main pipeline 23 are arranged in sequence on the bridge pipeline 2-4. The part of the third main pipeline 43 between the valve A8 and the load switch oil conservator 4 is in communication with the part of the bridge pipeline 2-4 between the valve A5 and the valve A6.

[0038] Preferably, as shown in the direction of the arrow, the load switch oil conservator 4 is arranged on the left side of the body oil conservator 2, and the volume of the load switch oil conservator 4 is smaller than the volume of the body oil conservator 2. Figure 2

[0039] Preferably, as shown in the direction of the arrow, the load switch oil conservator 4 is arranged on the left side of the body oil conservator 2, and the volume of the load switch oil conservator 4 is smaller than the volume of the body oil conservator 2. Figure 2 Figure 2 ​​The first sub-pipeline 41 is in inverted L-shaped structure as a whole, the upper end of which is communicated with the load switch oil conservator capsule 3, and the lower end is provided with a valve A2, which is communicated with the load switch breather 5, and the load switch breather 5 is communicated with the external environment, so that air can enter or discharge the load switch oil conservator capsule 3 through the load switch breather 5 and the valve A2; the second sub-pipeline 42 is in inverted L-shaped structure as a whole, the upper end of which is fixedly connected with the top of the load switch oil conservator 4 and communicated with the inside of the load switch oil conservator 4, and the lower end is provided with a valve A4, through which air can enter the load switch oil conservator 4; the third sub-pipeline 43 is fixedly connected with the bottom wall of the load switch oil conservator 4 and communicated with the inside of the load switch oil conservator 4, and the lower end is provided with a valve A8, through which insulating oil can enter or discharge the load switch oil conservator 4; the bridge pipeline 2-4 is communicated with the first sub-pipeline A4 at the left end and communicated with the third main pipeline 23 at the right end, and the valve A5 and the valve A6 are sequentially arranged on the bridge pipeline 2-4 from left to right, so that the pressure of the load switch oil conservator 4 and the load switch oil conservator capsule 3 can be balanced by closing / opening the valve A5, and the pressure between the load switch oil conservator 4 and the body oil conservator 2 can be balanced by closing / opening the valve A6, so as to prevent the pressure difference between the two from being too large, and also balance the pressure of the transformer body oil tank communicated with the body oil conservator 2 and the load switch oil tank communicated with the load switch oil conservator 4, so as to avoid the case that the load switch oil tank is damaged due to the too large pressure difference.

[0040] Preferably, as shown in the drawings, the load switch oil conservator 4 is further provided with a second oil level gauge for detecting the oil level in the load switch oil conservator 4. Figure 2 As shown in the drawings, the second oil level gauge is arranged at the lower left corner of the load switch oil conservator 4. Figure 2

[0041] Preferably, the bottom of the load switch oil conservator 4 is communicated with the load switch oil tank.

[0042] When the natural ester transformer oil conservator of the embodiment is in the following five states, the combination of opening or closing of the valves A1-A9 is used to balance the internal pressure of the natural ester transformer oil conservator, which is as follows:

[0043] ​When the natural ester transformer oil conservator is transported (usually together with the transformer), the valves A1-A4, A6, A8, A9 are closed, and the valves A5, A7 are opened; when the body oil conservator 2 and the on-load switch oil conservator 4 are vacuumized, the valves A1, A2, A8, A9 are closed, and the valves A3-A7 are opened, and the body oil conservator 2 and the on-load switch oil conservator 4 are vacuumized through the valves A3, A4 respectively; when the body oil conservator 2 and the on-load switch oil conservator 4 are injected with insulating oil or released insulating oil, the valves A3-A7 are closed, and the valves A1, A2, A8, A9 are opened; when the transformer is in normal operation, the valves A3-A9 are closed, and the valves A1-A2 are opened; when the transformer is under maintenance, the valves A5-A9 are closed, and the valves A1-A4 are opened.

[0044] The above description is further detailed in combination with the specific preferred embodiments of the present application, and cannot be deemed as limiting the specific implementation of the present application to these descriptions. For those skilled in the art to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, and all of them shall be deemed as falling within the protection scope of the present application.

Claims

1. A natural ester transformer oil storage tank, comprising a main body oil storage tank (2) and a main body oil storage tank capsule (1) disposed within the main body oil storage tank (2); Its features are: The main body oil storage tank capsule (1) is connected to the main body breather (6) through the first main pipeline (21), and valve A1 is provided on the first main pipeline (21); the upper part of the main body oil storage tank (2) is connected to the external environment through the second main pipeline (22), and valve A3 is provided on the second main pipeline (22); the main body oil storage tank (2) is connected to the third main pipeline (23), and insulating oil enters or exits the main body oil storage tank (2) through the third main pipeline (23), and valve A9 is provided on the third main pipeline (23); one end of the third main pipeline (23) is connected to the bottom of the main body oil storage tank (2), and valve A9 is provided on the other end; the part of the first main pipeline (21) located between valve A1 and the main body oil storage tank capsule (1) is connected to the part of the third main pipeline (23) located between valve A9 and the main body oil storage tank (2) through the fourth main pipeline (24), and valve A7 is provided on the fourth main pipeline (24); When the natural ester transformer oil tank is transported, valves A1, A3, and A9 are closed, and valve A7 is open; when the main body oil tank (2) is evacuated, valves A3 and A7 are open, and valves A1 and A9 are closed; when the main body oil tank (2) is injected with insulating oil or released with insulating oil, valves A3 and A7 are closed, and valves A1 and A9 are open; when the transformer is operating normally, valves A3, A7, and A9 are closed, and valve A1 is open; when the transformer is under maintenance, valves A7 and A9 are closed, and valves A1 and A3 are open.

2. The natural ester transformer oil conservator according to claim 1, characterized in that: One end of the first main pipeline (21) is connected to the main body oil tank capsule (1), and the other end is connected to one end of valve A1. The other end of valve A1 is connected to the main body breather (6); one end of the second main pipeline (22) is connected to the top of the main body oil tank (2), and the other end is equipped with valve A3; one end of the fourth main pipeline (24) is connected to the first main pipeline (21), and the other end is connected to the third main pipeline (23), and the middle part is equipped with valve A7.

3. The natural ester transformer oil conservator according to any one of claims 1-2, characterized in that: The main body oil tank (2) is also equipped with a first oil level gauge for detecting the oil level inside the main body oil tank (2).

4. The natural ester transformer oil conservator according to claim 1, characterized in that: It also includes an on-load switch oil storage tank (4) and an on-load switch oil storage tank capsule (3) installed inside the on-load switch oil storage tank (4); The on-load switch oil reservoir capsule (3) is connected to the on-load switch breather (5) through a first auxiliary pipeline (41), and a valve A2 is provided on the first auxiliary pipeline (41); the upper part of the on-load switch oil reservoir (4) is connected to the external environment through a second auxiliary pipeline (42), and a valve A4 is provided on the second auxiliary pipeline (42); the bottom of the on-load switch oil reservoir (4) is connected to a third auxiliary pipeline (43), and insulating oil enters or exits the on-load switch oil reservoir (4) through the third auxiliary pipeline (43), and a valve A8 is provided on the third auxiliary pipeline (43); the first auxiliary pipeline The portion of the pipeline (41) between valve A2 and the on-load switch oil reservoir capsule (3) is connected to the portion of the third main pipeline (23) between valve A9 and the main body oil reservoir (2) via the bridge pipeline (2-4); valves A5 and A6 are sequentially provided on the bridge pipeline (2-4) between the first auxiliary pipeline (41) and the third main pipeline (23); the portion of the third auxiliary pipeline (43) between valve A8 and the on-load switch oil reservoir (4) is connected to the portion of the bridge pipeline (2-4) between valves A5 and A6; When the natural ester transformer oil storage tank is transported, valves A1, A2, A3, A4, A6, A8, and A9 are closed, and valves A5 and A7 are open; when the main body oil storage tank (2) and the on-load switch oil storage tank (4) are evacuated, valves A1, A2, A4, A8, and A9 are closed, and valves A3, A5, A6, and A7 are open; when the main body oil storage tank (2) and the on-load switch oil storage tank (4) are injected with insulating oil or released with insulating oil... When the transformer is in operation, valves A3, A4, A5, A6, and A7 are closed, while valves A1, A2, A8, and A9 are open. During normal operation, valves A3, A4, A5, A6, A7, A8, and A9 are closed, while valves A1 and A2 are open. When the transformer is under maintenance, valves A5, A6, A7, A8, and A9 are closed, while valves A1, A2, A3, and A4 are open.

5. The natural ester transformer oil conservator according to claim 4, characterized in that: The on-load switch oil storage tank (4) is located on one side of the main body oil storage tank (2), and the volume of the on-load switch oil storage tank (4) is smaller than the volume of the main body oil storage tank (2).

6. The natural ester transformer oil conservator according to claim 4, characterized in that: One end of the first auxiliary pipeline (41) is connected to the on-load switch oil reservoir capsule (3), and the other end is connected to one end of valve A2. The other end of valve A2 is connected to the on-load switch breather (5). One end of the second auxiliary pipeline (42) is connected to the top of the on-load switch oil reservoir (4), and the other end is connected to valve A4. One end of the third auxiliary pipeline (43) is connected to the bottom of the on-load switch oil reservoir (4), and the other end is connected to valve A8. One end of the bridge pipeline (2-4) is connected to the first auxiliary pipeline (41), and the other end is connected to the third main pipeline (23). Valves A5 and A6 are sequentially arranged between the first auxiliary pipeline (41) and the third main pipeline (23).

7. The natural ester transformer oil conservator according to any one of claims 4-6, characterized in that: The on-load switch oil reservoir (4) is also equipped with a second oil level gauge for detecting the oil level inside the on-load switch oil reservoir (4).

8. The natural ester transformer oil conservator according to any one of claims 4-6, characterized in that: The bottom of the main body oil tank (2) is connected to the transformer main body oil tank, and the bottom of the on-load switch oil tank (4) is connected to the on-load switch oil tank.

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