CN216899507U - Transformer integral sealing test device for corrugated pipe oil conservator - Google Patents

Abstract

The utility model discloses a transformer integral sealing test device for a bellows oil pillow, which comprises a test pipeline, an exhaust pipeline and a pressure detection part. The connection flange connected by the flange interface of the body, the exhaust pipe and the pressure detection component are arranged on the test pipe, the test pipe is provided with a first switch valve, and the exhaust pipe is provided with a second switch valve. The utility model has the advantages of simple structure, convenient use and the like.

Description

A transformer overall sealing test device for bellows oil pillow

technical field

The utility model relates to the technical field of transformer testing equipment, in particular to a transformer integral sealing testing device for a bellows oil pillow.

Background technique

The new type of bellows oil pillow for large transformer has the advantages of good mechanical performance and stable operation, and constantly replaces the traditional capsule oil pillow. Because the expansion joint of the bellows oil pillow is flexible, the overall sealing test of the transformer cannot be carried out directly in the way of the traditional capsule oil pillow, which causes the main transformer to lose an important measure to troubleshoot hidden dangers.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and to provide a transformer integral sealing test device for a bellows oil pillow with a simple structure and convenient use.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

A transformer integral sealing test device for a bellows oil pillow, including a test pipe, an exhaust pipe and a pressure detection component, one end of the test pipe is provided with a pressure oil injection joint, and the other end is provided with a flange interface for connecting with the transformer body The connecting flange of the exhaust pipe and the pressure detection part are arranged on the test pipe, the test pipe is provided with a first on-off valve, and the exhaust pipe is provided with a second on-off valve.

As a further improvement of the above technical solution: the connecting flange is a square flange.

As a further improvement of the above technical solution: the connecting flange is connected to the flange interface through a threaded fastener.

As a further improvement of the above technical solution: the pressure detection component is a pointer pressure gauge.

As a further improvement of the above technical solution: the pressure detection component is a pressure sensor.

As a further improvement of the above technical solution: the exhaust pipe is located between the connection flange and the pressure detection component.

As a further improvement of the above technical solution, there are two first on-off valves, and the two first on-off valves are located on both sides of the pressure detection component.

As a further improvement of the above technical solution: the exhaust pipe is a transparent pipe.

As a further improvement of the above technical solution: the exhaust pipe is located above the test pipe.

As a further improvement of the above technical solution: both the first on-off valve and the second on-off valve are ball valves.

Compared with the prior art, the advantage of the present utility model lies in that: the utility model discloses a transformer integral sealing test device for bellows oil pillows. The injection joint can be injected with pressure oil, and the sealing connection with the flange interface of the transformer body can be realized through the connecting flange. The second on-off valve remains open, and the air in each pipeline can be discharged after injecting the pressure oil, thereby preventing the outside gas from entering the transformer of the measured pressure. After the exhaust is completed, close the second on-off valve and inject the pressure oil into the measured pressure. (the injected pressure oil is consistent with the oil sample of the transformer body), until the pressure reaches the set value, close the first switch valve to maintain the pressure, and check whether the pressure detected by the pressure detection component changes during the pressure maintenance process. , and then it can reflect whether the sealing performance of the equipment meets the standard, the structure is simple, the cost is low, and the use is convenient.

Description of drawings

FIG. 1 is a schematic front view of the structure of the transformer overall sealing test device for the bellows oil pillow according to the present invention.

FIG. 2 is a schematic top view of the transformer overall sealing test device for the bellows oil pillow according to the present invention.

11. Pressure oil injection joint; 12. Connecting flange; 13. First switch valve; 2. Exhaust pipeline; 21, Second switch valve; 3. Pressure detection part.

Detailed ways

The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments of the description.

Figures 1 to 2 show an embodiment of the transformer overall sealing test device for bellows oil pillows of the present invention. The transformer overall sealing test device for bellows oil pillows in this embodiment includes a test pipeline 1, a Gas pipeline 2 and pressure detection part 3. One end of test pipeline 1 is provided with a pressure oil injection joint 11, and the other end is provided with a connecting flange 12 for connecting with the flange interface of the transformer body. The exhaust pipeline 2 and pressure detection part 3 are located in On the test pipeline 1, a first on-off valve 13 is provided on the test pipeline 1, and a second on-off valve 21 is provided on the exhaust pipeline 2.

In the transformer overall sealing test device for bellows oil pillows, pressure oil injection joints 11 and connecting flanges 12 are respectively set at both ends of the test pipeline 1. Pressure oil can be injected through the pressure oil injection joints 11, and the connection flange 12 is used to realize the The sealing connection of the flange interface of the transformer body, the first on-off valve 13, the pressure detection component 3 and the exhaust pipe 2 with the second on-off valve 21 are arranged on the test pipeline 1, and the first on-off valve 13 and the second on-off valve 21 are kept open After injecting the pressure oil, the air in each pipeline can be discharged, thereby preventing the outside gas from entering the transformer of the measured pressure. After the exhaust is completed, close the second on-off valve 21 and inject the pressure oil into the transformer of the measured pressure ( The injected pressure oil is consistent with the oil sample of the transformer body), until the pressure reaches the set value, close the first switch valve 13 to maintain the pressure, and whether the pressure detected by the pressure detection component 3 changes during the pressure maintenance process, and then can It reflects whether the sealing performance of the equipment meets the standard, with simple structure, low cost and convenient use.

As a preferred embodiment, the connecting flange 12 is a square flange. The square flange can better match the flange interface of the bellows oil pillow, which is beneficial to improve the sealing performance of the joint.

Further, in this embodiment, the connecting flange 12 is connected with the flange interface through a threaded fastener, the connection structure is reliable, and the disassembly and assembly are convenient.

Wherein, the pressure detection component 3 may be a pointer-type pressure gauge or a pressure sensor, etc., and only needs to be able to accurately detect the pressure.

As a preferred embodiment, the exhaust pipe 2 is located between the connecting flange 12 and the pressure detection component 3, which helps to fully discharge the air inside the test device and ensures the accuracy of the test results.

As a preferred embodiment, there are two first on-off valves 13 , and the two first on-off valves 13 are arranged on both sides of the pressure detection component 3 , with higher structural redundancy and more flexible use. Of course, in other embodiments, only a single first on-off valve 13 can be provided to complete the test process.

As a preferred embodiment, the exhaust pipe 2 is a transparent pipe. The transparent pipe is used to facilitate timely observation of whether there is pressure oil discharged during the test process, and then to determine whether the gas is exhausted.

As a preferred embodiment, the exhaust pipe 2 is located above the test pipe 1, which is beneficial to exhaust the gas in each pipe during exhaust. After the exhaust is completed, it is convenient for the pressure oil in the exhaust pipe 2 to return.

As a preferred embodiment, the first on-off valve 13 and the second on-off valve 21 are both ball valves, which have good sealing performance and are easy to operate. Of course, in other embodiments, other existing valves can also be used to control the on-off of each pipeline.

The utility model is directed to the use method of the transformer integral sealing test device for the bellows oil pillow as follows:

Before carrying out the sealing test of the transformer bellows oil pillow, it is necessary to close the valves on both sides of the transformer gas relay, remove the gas relay on the transformer body, connect the connecting flange 12 and the gas relay by the flange interface on the transformer body side, and fasten them by screws. The parts are locked to ensure the tightness of the flange connection. Then inject the transformer oil through the pressure oil injection joint 11, open the two first on-off valves 13 and the second on-off valve 21, the outlet of the exhaust pipe 2 is kept at a high position, and with the continuous injection of the transformer oil with pressure, The air in each pipe was exhausted until the strands of transformer oil were continuously discharged from the outlet of the exhaust pipe 2, indicating that the gas in the test device had been completely exhausted. Close the second on-off valve 21, open the valve on the transformer body side, and continue to pressurize until the pressure of the pressure detection part 3 shows about 0.035MPa, close the first on-off valve 13 on the right side of the pressure detection part 3, and stop the pressurization. Let it stand for a certain time (usually 12 hours), and then observe whether the indication of the pressure detection part 3 decreases. If the pressure value can be kept within the set range, it means that the sealing performance of the transformer is good, and the requirements are met, and the transformer bellows is completed. Tightness test of oil pillows.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or be modified to equivalent changes, etc. effective example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention should fall within the protection scope of the technical solutions of the present invention.

Claims (10)

1. The utility model provides a whole sealing test device of transformer to bellows conservator which characterized in that: including test pipeline (1), exhaust duct (2) and pressure measurement part (3), test pipeline (1) one end is equipped with pressure oil injection joint (11), and the other end is equipped with flange (12) that are used for with transformer body flange interface connection, exhaust duct (2) and pressure measurement part (3) are located on test pipeline (1), be equipped with first ooff valve (13) on test pipeline (1), be equipped with second ooff valve (21) on exhaust duct (2).

2. The integral sealing test device for the transformer of the bellows conservator as claimed in claim 1, wherein: the connecting flange (12) is a square flange.

3. The integral sealing test device for the transformer of the bellows conservator as claimed in claim 2, wherein: the connecting flange (12) is connected with the flange interface through a threaded fastener.

4. The integral sealing test device for the transformer of the bellows conservator as claimed in claim 1, wherein: the pressure detection part (3) is a pointer type pressure gauge.

5. The integral sealing test device for the transformer of the bellows conservator as claimed in claim 1, wherein: the pressure detection component (3) is a pressure sensor.

6. The integral seal test device for the transformer of the bellows conservator according to any one of claims 1 to 5, wherein: the exhaust pipeline (2) is located between the connecting flange (12) and the pressure detection part (3).

7. The integral sealing test device for the transformer of the bellows conservator as claimed in claim 6, wherein: the number of the first switch valves (13) is two, and the two first switch valves (13) are respectively arranged on two sides of the pressure detection component (3).

8. The integral seal test device for the transformer of the bellows conservator according to any one of claims 1 to 5, wherein: the exhaust pipeline (2) is a transparent pipe.

9. The integral seal test device for the transformer of the bellows conservator according to any one of claims 1 to 5, wherein: the exhaust pipeline (2) is located above the test pipeline (1).

10. The integral seal test device for the transformer of the bellows conservator according to any one of claims 1 to 5, wherein: the first switch valve (13) and the second switch valve (21) are both ball valves.

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