Oil drain valve and oil pipe loop sealing device assembly for transformer oil chromatography online monitoring device

Abstract

The invention discloses an oil drain valve and oil pipe loop sealing device assembly for a transformer oil chromatography online monitoring device. The oil drain valve and oil pipe loop sealing device assembly comprises a connection arm, a sealing flat ring, an oil drain valve, a locking sealing oil pipe nut, a locking sealing oil pipe hollow bolt, a hollow tower-shaped sealing ring and an oil pipe. Through the oil drain valve and oil pipe loop sealing device assembly for the transformer oil chromatography online monitoring device, the problem of oil leakage in the joint of the oil drain valve and the oil pipe of the high-voltage high-capacity transformer oil chromatography online monitoring device is solved, the defects of the transformer oil chromatography online monitoring device are overcome, a great facilitation function on deep development of transformer oil chromatography online monitoring work with high heat degree in China at present is achieved, a positive boosting effect is achieved for installing oil chromatography online monitoring devices on high-voltage high-capacity transformers in China energetically, and effective safety measures and technical support are provided for further improving safe and stable operation of the transformers and reliability of safe power usage.

Description

technical field [0001] The invention relates to the technical field of electric power system equipment, in particular to an oil discharge valve oil pipe circuit sealing device assembly of a transformer oil chromatography on-line monitoring device. Background technique [0002] Transformer is the key equipment in the power system, and its safe and stable operation is very important. Therefore, at present, according to the requirements, the electric power maintenance department has installed oil chromatography on-line monitoring devices on transformers of 220kV and above. However, the problem of oil leakage from the oil sample collection pipeline and the oil return pipeline independent variable side valve in the oil chromatography on-line monitoring device is relatively prominent, and the current repair effect is not ideal. [0003] Oil leakage from the pipeline valve of the 220kV and above transformer oil chromatographic on-line monitoring device will not only cause the appe...

AI Technical Summary

Problems solved by technology

However, the oil chromatographic on-line monitoring device has a serious problem of oil leakage from the oil sample collection pipeline and the oil return pipeline independent variable side valve, and the current repair effect is not ideal

[0003] Oil leakage from the pipeline valve of the 220kV and above transformer oil chromatographic on-line monitoring device will not only cause the appearance of the transformer to be dirty, but also due to the poor sealing of the humid air outside, it will be immersed in the insulating oil as the body temperature changes during the day and night operation of the transformer. It will cause the insulation strength of the transformer insulating oil to decrease; it will also cause the paper insulation material and solid organic insulation material inside the transformer to be damp and reduce the insulation performance; it will also increase the components of the characteristic gas significantly, which will affect the on-line monitoring of transformer oil chromatography in the long run The detection, analysis and judgment of the gas by the device will ultimately affect the analysis results of the oil chromatography and the fault judgment of the transformer, causing large-scale transformer operation accidents. There have been many such large-scale transformer operation accidents in China

[0005] ① The thread depth of the connector screwed into the oil drain valve is relatively shallow, and the design of the gasket and sealing structure between the oil drain valve and the connector is unreasonable. , but if the connector is connected to the oil pipe to seal and lock the lock nut, it is difficult for the installer to control when tightening the lock nut to ensure that there will be no rotation or the slightest looseness between the oil drain valve and the connector. It will cause oil leakage along the joint between the oil drain valve and the connector. It is inevitable that the manufacturer's product design will cause looseness between the oil drain valve and the connector during the installation of the oil pipe.

Even if the installer realizes that the oil drain valve and the connector are re-tightened, the sealing ring between the oil drain valve and the connector will be deformed under pressure due to repeated application of torque;

[0006] ② The manufacturer of the sealing ring between the oil drain valve and the connector chooses rubber material, which has poor resistance to mechanical force, aging and corrosion;

[0007] ③ The lock nut at the connection between the connector and the oil pipe is not tightly sealed, and the connector is not easy to install during the process of connecting the oil pipe

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