Double pressure-sensitive revising type transformer oil level indicator

Abstract

The invention relates to a double pressure-sensitive revising type transformer oil level indicator. The oil level indicator is characterized by comprising an oil level indicator main body, oil level indicator bodies, a butterfly bamper, an oil level indicator dial plate, pressure sensors and an oil level indicator measuring circuit, two ends of the oil level indicator main body are connected withan injection oil pipe, and the two oil level indicator bodies are respectively perpendicularly arranged on the side wall of the oil level indicator main body; the two pressure sensors are arranged inside the oil level indicator body and is located outside the butterfly bamper, the oil level indicator dial plate is installed outside one oil level indicator body and is used for displaying an oil level in local, the oil level indicator measuring circuit is installed inside the oil level indicator body, and the oil level indicator measuring circuit is connected with external equipment through a power supply and a signal cable. According to the double pressure-sensitive revising type transformer oil level indicator, the two pressure sensors measure pressure intensity of transformer oil and calculate oil density by utilizing a pressure intensity difference, real-time monitoring is carried out on the oil level of a transformer capsule type or diaphragm type oil conserving cabinet, and the oillevel indicator has the advantages of accurate measurement, high reliability, convenient read and the like.

Description

technical field [0001] The invention belongs to the technical field of transformers, in particular to a double pressure-sensitive correction type transformer oil level gauge. Background technique [0002] The large power transformers currently in operation are mainly oil-immersed transformers, and the transformer oil plays the role of insulation and cooling during the operation of the transformer. If the oil level of the transformer is too high, it may cause excessive pressure in the oil tank at high temperature or under heavy load, resulting in oil overflow or the action of the pressure relief valve; if the oil level of the transformer is too low, the high pressure part may lose the protection of oil and be exposed Cause breakdown or discharge; at the same time, the oil level can also reflect the sealing condition of the fuel tank, which is convenient for timely detection of oil leakage or oil leakage. Therefore, timely and accurate monitoring of the oil level is very impo...

AI Technical Summary

Problems solved by technology

At present, there are mainly two types of transformer oil level gauges: float pointer type and oil pipe type. They are generally installed on the side wall of the oil storage tank. The operation and maintenance personnel go to the location of the transformer to read the oil level gauge on the spot to obtain the oil level information; (2) The failure rate is high, often due to the damage of the capsule of the oil pipe type oil level gauge, the jamming of the floating ball of the float pointer type oil level gauge, etc. "False oil level" appears; (3) It is difficult to read, because the oil level gauge is installed in a high position and the dial is small, the operation and maintenance personnel standing under the transformer will not be able to read because the viewing angle is too small, and standing at a distance because the distance is too large It is difficult to see from a distance, and with the increase of running time, water and oil pollution often appear in the dial, which further affects the reading

[0004] The applicant used "oil level gauge" as the key word to search, and retrieved the patent document "an oil level gauge structure for transformer oil conservator" (patent publication number: CN106092267A), which introduced a connecting rod, floating ball The new oil level gauge structure composed of a capsule has a simple principle and high reliability, but it is still a mechanical oil level gauge, which cannot realize remote oil level monitoring; other search results also did not find an oil level gauge that can realize remote monitoring functions

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