CN-115881402-B - Special tool for oil discharge internal inspection of three-phase integrated large-sized transformer

Abstract

The invention belongs to a special tool for oil discharge internal inspection of a transformer, and particularly relates to a special tool for oil discharge internal inspection of a three-phase integrated large-sized transformer. The pipeline comprises a tee pipeline, a metal hose, a pipeline with a ball valve and a pipeline, wherein the corrugated pipeline, a second flange surface of a first tee pipeline is connected with a seventh flange surface of the metal hose, a third flange surface of the first tee pipeline is connected with a twelfth flange surface of the pipeline, an eleventh flange surface of the pipeline is connected with a fourteenth flange surface of a second corrugated pipeline, an eighth flange surface of the metal hose is connected with a ninth flange surface of the pipeline with the ball valve, a tenth flange surface of the pipeline with the ball valve is connected with a fifth flange surface of a second tee pipeline, and a third flange surface of the second tee pipeline is connected with a thirteenth flange surface of the first corrugated pipeline. The special tool provided by the invention is used in the oil discharge internal inspection project of the three-phase integrated large-sized transformer, so that the efficiency and the maintenance quality of the oil discharge internal inspection work can be greatly improved.

Inventors

• YANG ZHONGYOU
• LU XUYAO
• ZHU YI
• SHI YANFENG
• Xia Zhenyue
• ZOU PING
• PANG XUCHANG

Assignees

• 中核核电运行管理有限公司
• 秦山第三核电有限公司

Dates

Publication Date

20260512

Application Date

20210929

Claims (10)

1. 1. A three-phase integrated large-scale transformer oil drain internal inspection special tool is characterized by comprising a first three-way pipeline, a second three-way pipeline, a metal hose, a pipeline with a ball valve, a first pipeline, a first corrugated pipeline and a second corrugated pipeline, wherein the second flange surface of the first three-way pipeline is connected with the seventh flange surface of the metal hose, the third flange surface of the first three-way pipeline is connected with the twelfth flange surface of the first pipeline, the eleventh flange surface of the first pipeline is connected with the fourteenth flange surface of the second corrugated pipeline, the eighth flange surface of the metal hose is connected with the ninth flange surface of the pipeline with the ball valve, the tenth flange surface of the pipeline with the ball valve is connected with the fifth flange surface of the second three-way pipeline, the third flange surface of the second three-way pipeline is connected with the thirteenth flange surface of the first corrugated pipeline, the first joint of the first corrugated pipeline is connected with a vacuum pump, the first flange surface of the first three-way pipeline is connected with a side exhaust flange at the top of a transformer oil pillow, the first oil tank of the second corrugated pipeline is connected with a pressure release switch of the transformer, and the top of the transformer oil tank is connected with the fourth flange and the top of the vacuum pump is connected with the top of the transformer oil tank.
2. 2. The special tool for oil discharge internal inspection of a three-phase integrated large transformer according to claim 1, wherein the two ends of the first three-way pipeline are flanges, holes are evenly distributed on the flanges, the branch pipeline is located at the middle point of the axial direction of the main pipeline, one end of the branch pipeline is provided with the flanges, and the holes are evenly distributed on the flanges.
3. 3. The tool for oil discharge internal inspection of a three-phase integrated large transformer according to claim 1, wherein flanges are arranged at two ends of the second three-way pipeline, holes are evenly distributed in the flanges, the branch pipeline is located at the middle point of the axial direction of the main pipeline, one end of the branch pipeline is provided with a flange, and the holes are evenly distributed in the flanges.
4. 4. The tool for oil discharge internal inspection of a three-phase integrated large transformer of claim 1, wherein the two ends of the metal hose are respectively provided with a flange.
5. 5. The special tool for oil discharge internal inspection of a three-phase integrated large transformer according to claim 4, wherein the inner material of the metal hose is 304 corrugated pipes, the outer material of the metal hose is 304 metal woven mesh, the specifications of flanges at two sides of the metal hose are consistent, and holes are evenly distributed on the flanges.
6. 6. The tool for oil discharge internal inspection of a three-phase integrated large-scale transformer according to claim 1, wherein flanges are arranged at two ends of the pipeline with the ball valve, holes are evenly distributed in the flanges, and the ball valve is arranged at the axial midpoint of the pipeline, and the opening degree of the ball valve is 90 degrees.
7. 7. The tool for oil discharge internal inspection of a three-phase integrated large transformer of claim 1, wherein flanges are arranged at two ends of the first pipeline.
8. 8. The tool for oil discharge internal inspection of a three-phase integrated large transformer of claim 7, wherein flanges at two ends of the first pipeline have different outer diameters.
9. 9. The tool for oil discharge internal inspection of a three-phase integrated large-scale transformer of claim 1, wherein one end of the first corrugated pipe is provided with a flange, and the other end of the first corrugated pipe is provided with a quick connector.
10. 10. The tool for oil discharge internal inspection of a three-phase integrated large-scale transformer of claim 1, wherein one end of the second corrugated pipeline is provided with a flange, and the other end of the second corrugated pipeline is provided with a quick connector.

Description

Special tool for oil discharge internal inspection of three-phase integrated large-sized transformer Technical Field The invention belongs to a special tool for oil discharge internal inspection of a transformer, and particularly relates to a special tool for oil discharge internal inspection of a three-phase integrated large-sized transformer. Background The reliability of the transformer, which is used as a junction device of the power system, directly affects the safe operation of the whole power system, so that the transformer is indispensable to the periodical maintenance. For a large-scale oil immersed transformer in operation, components such as windings, transformer oil, a cooling system, an on-load voltage regulating switch and the like play an extremely important role, so that most power plants need to periodically execute oil discharge internal inspection work of the three-phase integrated large-scale transformer except for conventional monitoring means such as oil sample analysis, partial discharge test, infrared imaging temperature measurement and the like so as to directly inspect and evaluate the operation condition of the transformer. In the past, in the oil discharging and inner checking working process of the three-phase integrated large-sized transformer, no communicating pipe is used for vacuumizing and oiling, and a transformer oil pillow, a main mailbox, a tapping switch oil tank, a vacuum pump and an oiling machine cannot be kept at the same pressure level, so that irreversible damage can be generated due to overlarge pressure difference in each oil tank. Disclosure of Invention The invention aims to provide a special tool for oil discharge internal inspection of a three-phase integrated large-sized transformer, which can effectively improve the efficiency and the maintenance quality of oil discharge internal inspection. The technical scheme is that the tool comprises a first three-way pipeline, a second three-way pipeline, a metal hose, a pipeline with a ball valve, a first pipeline, a first corrugated pipeline and a second corrugated pipeline, wherein the second flange of the first three-way pipeline is connected with the seventh flange of the metal hose, the third flange of the first three-way pipeline is connected with the twelfth flange of the first pipeline, the eleventh flange of the first pipeline is connected with the fourteenth flange of the second corrugated pipeline, the eighth flange of the metal hose is connected with the ninth flange of the pipeline with the ball valve, the tenth flange of the pipeline with the ball valve is connected with the fifth flange of the second three-way pipeline, the third flange of the second three-way pipeline is connected with the thirteenth flange of the first corrugated pipeline, the first joint of the first corrugated pipeline is connected with a vacuum pump, the first flange of the first corrugated pipeline is connected with a side exhaust flange at the top of a transformer oil pillow, the eighth flange of the second corrugated pipeline is connected with the top of the transformer oil pillow, and the top of the transformer oil tank is connected with the top of the transformer, and the top of the transformer is connected with the top of the drain pump. The two ends of the first three-way pipeline are flanges, holes are evenly distributed on the flanges, the branch pipelines are located at the middle point of the axial direction of the main pipeline, one end of each branch pipeline is provided with a flange, and holes are evenly distributed on the flanges. The two ends of the second three-way pipeline are provided with flanges, the flanges are provided with evenly distributed holes, the branch pipeline is positioned at the middle point of the axial direction of the main pipeline, one end of the branch pipeline is provided with a flange, and the flanges are provided with evenly distributed holes. The two ends of the metal hose are respectively provided with a flange plate. The inner material of the metal hose is 304 corrugated pipe, the outer material is 304 metal woven net, the specifications of flanges at two sides of the metal hose are consistent, and holes are evenly distributed on the flanges. The pipeline with the ball valve is characterized in that flanges are arranged at two ends of the pipeline, holes are evenly distributed in the flanges, the ball valve is arranged at the middle point of the axial direction of the pipeline, and the opening degree of the ball valve is 90 degrees. The two ends of the first pipeline are provided with flanges. The flanges at the two ends of the first pipeline have different outer diameters. One end of the first corrugated pipeline is provided with a flange plate, and the other end of the first corrugated pipeline is provided with a quick connector. One end of the second corrugated pipeline is provided with a flange, and the other end of the second corrugated pipeline is provided with a quick connecto