Converter transformer provided with glass tube type oil-level indicator and mounting method of indicator

Abstract

The invention discloses a converter transformer provided with a glass tube type oil-level indicator. The converter transformer comprises a converter transformer body, wherein the top of the converter transformer is communicated with an oil conservator; an air bag is arranged in the oil conservator; the top of the air bag is communicated with one end of an air tube; the other end of the air tube is communicated with one end of a respirator; the other end of the respirator is inserted into a respirator oil cup; the bottom of the converter transformer body is communicated with an oil tube; the oil tube is communicated with a transparent glass tube; a floating ball is arranged in the transparent glass tube; the upper end of the transparent glass tube is communicated with the air tube through an exhaust tube; and a scale line is arranged on the transparent glass tube. A mounting method of the glass tube type oil-level indicator comprises the following steps: emptying the transformer oil in the oil conservator; forming mounting holes in the bottom of the converter transformer body and the air tube respectively; welding the oil tube on one mounting hole, and welding the exhaust tube on the other mounting hole; mounting the transparent glass tube between the oil tube and the exhaust tube, and mounting the floating ball in the transparent glass tube; setting a scale line on the transparent glass tube; opening an oil outlet valve and the exhaust tube. The invention is suitable for the converter transformer.

Description

technical field [0001] The invention relates to a converter transformer, in particular to a converter transformer with a glass tube type oil level indicator and an installation method for the indicator. Background technique [0002] With the rapid development of my country's economy, a large number of DC transmission projects have been put into operation. The converter transformer is the core equipment of the direct current transmission project, and its oil-filled capacity is 100 tons, which is a large-scale oil-filled equipment. The converter transformer generally includes a converter transformer body, a gas pipe and a respirator oil cup. The top of the converter transformer body is connected to an oil conservator. There is an air bag inside the oil conservator that can separate the transformer oil from the air in the conservator. The top of the air bag is connected to the gas pipe One end of the trachea is connected to one end of the respirator, and the other end of the r...

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Problems solved by technology

[0004] 1. Because the material strength of the floating ball connecting rod is not high, it is easy to bend under the action of external force (such as the pressure of the air bag), which may cause the oil level indication to be wrong. In this way, when the oil level alarm occurs, it is impossible to judge the cause of the alarm as the oil level indication Gauge failure or actual oil level abnormality;

[0005] 2. The inspection and replacement process of the floating ball connecting rod is complicated. Since the oil level indicator plate is installed on the flange at the bottom of the oil conservator, if you want to inspect and replace the floating ball connecting rod and the linkage mechanism, you must first remove the bottom of the oil conservator flanges, to empty all the transformer oil inside the oil conservator, so that there will be a large loss and waste of transformer oil, and it will also cause certain environmental pollution

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