Electrification oil sample acquisition device for oil-immersed sleeve pipe of transformer

Abstract

The invention discloses an electrification oil sample acquisition device for an oil-immersed sleeve pipe of a transformer, comprising an oil conservator of a corrugated metal expansion apparatus, a four-way valve, a sleeve pipe of the transformer and an aciform sample acquisition valve, wherein, the oil conservator of the corrugated metal expansion apparatus is suspended and installed on a fastening bolt on the top of cone of the sleeve pipe of the transformer in a regular way, the four-way valve is arranged on the lower end of the oil conservator of the corrugated metal expansion apparatus, the vertical downward interface of the four-way valve is connected with a connecting pipe by a joint, the connecting pipe is connected with the exhaust hole of the sleeve pipe of the transformer by a through screw, a downward guidance pipe is connected to the lower end of the sleeve pipe of the transformer, and the aciform sample acquisition valve is connected to the other end of the downward guidance pipe. The invention realizes the function of electrification oil sample acquisition of the sleeve pipe of the transformer, realizes the troubleshooting and the maintenance of the sleeve pipe of the transformer under the state of uninterrupted power supply, thoroughly solves the conflict between the scheme of troubleshooting of equipment state and the requirement of periodical power cut for the sample acquisition analysis of the sleeve pipe, achieves the controllability and the under-control of the technical supervision of the equipment, and lays a solid foundation for the high-quality, safe and reliable power supply for the society.

Description

technical field [0001] The invention relates to a transformer detection auxiliary device in the field of power distribution, in particular to a transformer-like oil-immersed bushing live oil sampling device. Background technique [0002] Due to structural reasons, there are many problems in the operation of transformer oil-immersed bushings, such as: [0003] 1) The transformer high-voltage oil-immersed capacitive bushing oil conservator has a non-fully sealed structure, and there are defects of water ingress and moisture; [0004] 2) Partial discharge and overheating defects of large-scale power main transformer bushings occur from time to time; [0005] 3) The grounding of the end screen of the high-voltage oil-immersed capacitive bushing capacitor is weak, and it is easy to break and discharge under strong earthquakes; [0006] 4) The oil level of the casing oil conservator indicates that there is no sufficient amount of oil, and oil needs to be replenished frequently. ...

AI Technical Summary

Problems solved by technology

[0003]1) The transformer high-voltage oil-immersed capacitive bushing oil conservator has a non-fully sealed structure, and there are defects of water ingress and moisture;

[0004]2), large power main transformer bushing partial discharge and overheating defects occur from time to time;

[0005]3), the grounding of the end screen of the high-voltage oil-immersed capacitive bushing capacitor is weak, and it is easy to break and discharge under strong earthquakes;

[0006]4). The oil mark of the casing oil conservator indicates that there is no sufficient oil volume, and regular oil replenishment is required. Influenced by pressure, the insulating oil seal is repeatedly damaged, and frequent disassembly may lead to unreliable sealing of the oil supply and exhaust nut, resulting in major defects of water ingress and moisture;

[0007]5), bushing insulating oil chromatography and micro-water detection are very necessary, and oil samples need to be taken regularly, but at present, transformer bushings can only be analyzed by power failure, which is harmful to the power grid. The power supply reliability index has a great influence

[0008]6) When the staff samples the 110kV and above oil-immersed bushing, due to the negative pressure inside the bushing, it is necessary to open the exhaust hole on the top of the bushing Sampling can only be done by exhausting the vacuum, and there is a possibility that the seal is not reliable and not tight when recovering after sampling

Moreover, the bushing is an oil-less equipment, and qualified transformer oil needs to be added after multiple samplings, which increases the workload of the staff and the power outage time

[0009]Currently, the analysis and tracking of transformer bushing oil sampling must be carried out in conjunction with the pre-test when the main transformer is powered off. 3-4 years), it is impossible to carry out live oil sample analysis of the bushing, and the possible insulation defects (such as damp, discharge or overheating) of the bushing cannot be found in time

It is more difficult when the chromatographic analysis data is abnormal and requires continuous sampling and tracking. Sometimes the power supply and power supply reliability have to be sacrificed to achieve the purpose of continuous monitoring. This conflicts with the condition-based maintenance data collection, which makes it difficult to comprehensively evaluate the equipment status.

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