Ultrasonic oil conservator oil level detector for power transformer

Abstract

The invention relates to the technical field of a transformer detecting device, and particularly to an ultrasonic oil conservator oil level detector for a power transformer. The ultrasonic oil conservator oil level detector comprises a microprocessor, an ultrasonic sensor, a driving circuit, a signal processing circuit, a wireless communication device and a power supply module. The driving circuit and the signal processing circuit are respectively connected between the ultrasonic sensor and the microprocessor. The wireless communication device is connected with the microprocessor in a TTL serial-port manner. The ultrasonic oil conservator oil level detector for the power transformer has beneficial effects of 1, realizing noncontact measurement for the oil level of a transformer oil conservator; 2, realizing fixed-point detection and continuous detection at different points; 3, realizing fixed-position fixed mounting, remote control and movable temporary detection; and 4, realizing no protection and no effect by light and an ambient medium and relatively low cost compared with other infrared, laser or radioactive detecting mode.

Description

technical field [0001] The invention relates to the technical field of transformer detection devices, in particular to an ultrasonic oil conservator oil level detector for a power transformer. Background technique [0002] Oil conservator (also known as oil storage tank or oil conservator) is an important component of transformer. When the volume of transformer oil expands or shrinks with the change of oil temperature, the oil conservator plays the role of oil storage and oil replenishment; at the same time, the oil conservator It can also reduce the contact area between the transformer and the air, and the moisture, dust and oxidized grease absorbed from the air can all be deposited in the depositor at the bottom of the oil conservator, which can greatly slow down the deterioration of transformer oil. [0003] At present, the detection of the oil level of the oil conservator generally adopts two methods: the horizontal glass tube indication or the metal floating ball oil le...

AI Technical Summary

Problems solved by technology

[0003] At present, the detection of the oil level of the oil conservator generally adopts two methods: the horizontal glass tube indication or the metal floating ball oil level gauge. The former is based on the principle of U-shaped liquid level gauge pressure balance, and the latter is based on the magnetic force change caused by the floating ball connecting rod. And eventually cause the needle to change. Since both are purely mechanical structures, they must be in direct contact with the transformer oil for detection. In this way, when the capsule in the oil pillow ruptures, the pressure is abnormal or the floating ball ruptures, the connecting rod is bent, and the needle is stuck When a failure occurs, most of the oil conservator needs to be disassembled for maintenance. After the maintenance is completed, it is necessary to conduct a series of operations such as sealing test, vacuuming, and oil filling on the oil conservator.

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