Oil chamber sealing leak detection device and method of on-load tap-changer

Abstract

The invention relates to an oil chamber sealing leak detection device of an on-load tap-changer. The leak detection device mainly comprises a filter, a gate valve I, a reducing valve, a left three-way pipe, a gate valve II, a pre-fill one-way valve, a pre-fill pipeline, a leak detection instrument, a right three-way pipe, a pressure gauge, an inflatable hose and an inflatable fast chuck. When sealing detection is performed on a container, compressed air of 0.6 MPa enters the filter at first, then passes through the gate valve I, the reducing valve, the gate valve II and the pre-fill pipeline, and finally passes through the pressure gauge and the inflatable hose to enter the product container; after an observed result shows that the pre-fill inflatable pressure gauge reaches a set value, the pre-fill one-way valve is closed; a leak detection program is started up; when the normal inflation pressure reaches 80 KPa, the leak detection instrument automatically enters a detection state; after the leak detection is completed, a leak detection result is popped up automatically. The leak detection device and method have the advantages as follows: the setting precision and display resolution of the leak detection instrument are high; the detection time, pressure and the like can be set according to the size of the container; the judgment result is given automatically.

Description

technical field [0001] The invention belongs to the field of electromechanical technology, and in particular relates to an oil chamber seal leak detection device of an on-load tap changer and a detection method thereof. [0002] Background technique [0003] In the production process of on-load tap-changers, the oil chamber sealing requirements are very high, because if the sealing is not good, the transformer oil will leak, which will affect the quality of the product. like figure 1 As shown, the traditional leak detection method is: when detecting, first inject transformer oil into the sealed container to about 90% of the depth of the container, then fill in compressed air to about 0.08MPa under the monitoring of the pressure gauge, and close the external valve connected to the container , stop pressurization. Keep the static pressure for 120 minutes, and then observe whether the pressure indication value of the pressure gauge changes, or check whether there is oil l...

AI Technical Summary

Problems solved by technology

The disadvantages are: the detection time of a single unit is long, limited by the accuracy of ordinary pressure gauges, the reading accuracy is not high, and manual observation of the pressure gauge readings is easy to cause misjudgment, especially for micro-leakage containers.

Especially for slightly leaky airtight containers, it may not be detected by traditional detection methods within 120 minutes

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