Device and method for seal test of floating ball type gas relay
A gas relay and sealing test technology, which is applied in the direction of liquid tightness measurement using liquid/vacuum degree, and by measuring the increase and deceleration rate of the fluid, can solve the problem of misoperation, and it is difficult for inspectors to visually detect the tiny cracks of the floating ball. The gas relay loses its protective meaning and other problems, and achieves the effect of simple operation, reliable use and light weight
Active Publication Date: 2012-08-01
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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Problems solved by technology
For the float type gas relay, if there are tiny or invisible cracks in the float, it cannot be detected directly, because at this time the oil in the float is small or the oil has not entered the float, and most of the floats are made of opaque materials. It is difficult to visually detect whether there is oil in the floating ball or tiny cracks on the surface of the floating ball, let alone hidden cracks; and when the amount of oil in the floating ball is small, it has little effect on the weight and buoyancy of the ball itself, and thus For the floating ball gas relay whose action contact is supported by the floating ball, the change of the action signal value is also small, so the quality of the floating ball cannot be detected through light and heavy gas calibration
Moreover, the conventional airtightness test of the gas relay can detect whether the floating ball has a large crack, but it cannot detect whether there is a small or hidden crack in the floating ball
If a relay with a floating ball with tiny or hidden cracks is installed on a transformer, the floating ball will be soaked in pressurized oil for a long time, and the oil will slowly seep into the floating ball. When there is too much oil in the floating ball , the gas relay will lose its protective significance, and even malfunction in severe cases, resulting in electrical accidents
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[0039] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0040] See figure 1 , which shows a schematic structural diagram of a floating ball type gas relay sealing test device according to an embodiment of the present application. The device mainly includes: a detection platform 1, a vacuum pump 2, a gas regulating valve, an oil pump 3, a liquid regulating valve, an oil tank 4, and a controller...
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The application provided by the invention discloses a device and a method for a seal test of a floating ball type gas relay. A vacuum pump is used for vacuumizing the floating ball type gas relay, and an oil pump is used for injecting heated oil into the floating ball type gas relay, so that the seal test of the floating ball type gas relay under the vacuum can be carried out, and whether a tiny or recessive crack exists in the floating ball can be detected through detecting the oil filling quantity in the floating ball; and the test device includes the vacuum pump, the oil pump and a regulating valve, and has such characteristics as small size, light weight, automatic test realized through a controller, simplicity in operation, reliability in use, etc.
Description
technical field [0001] The present application relates to the technical field of relay testing, in particular to a floating ball type gas relay sealing test device. Background technique [0002] The oil-immersed transformer is currently the most widely used transformer in the domestic power system, and it is also one of the most important equipment in the power supply system. The power supply system has carried out multiple protections to ensure the safe operation of the transformer. The main protection element for the internal fault of the oil-immersed transformer. When the internal fault of the oil-immersed transformer occurs, the arc will decompose the insulating material and generate a large amount of gas. The gas relay uses the reactive gas to issue a fault alarm in time and quickly remove the fault from the power grid. equipment, reduce the occurrence of power accidents, and improve the safety and reliability of power equipment operation. Therefore, the quality and cal...
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Inventor 单莉
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST