Preparation method and device of gas capable of replacing sulfur hexafluoride for running-in test

Abstract

The invention discloses a preparation method and device of gas capable of replacing sulfur hexafluoride to carry out a running-in test, air is filtered by a combined air cleaning device to form clean gas, and the clean gas is directly filled into a product to carry out a mechanical running-in operation test. According to the electrical equipment mechanical characteristic running-in test process, the sulfur hexafluoride is replaced by the clean air, firstly, the problem that after sulfur hexafluoride gas is used for mechanical property running-in, due to the fact that a sulfur hexafluoride recovery device cannot completely recover residual sulfur hexafluoride in a product, the residual sulfur hexafluoride is released into air when a cover is opened for cleaning can be thoroughly solved, and the protection on the atmospheric environment is greatly facilitated; and 2, after the clean air is adopted to carry out a mechanical characteristic running-in test, the process is optimized from the original steps of product vacuumizing (3h), sulfur hexafluoride inflation (0.5 h) and sulfur hexafluoride recovery (0.75 h) to direct clean air inflation / deflation (0.5 h), process waiting and environmental damage are avoided, the time of a single product can be saved by 3.75 hours, and the production period is shortened to a great extent.

Description

technical field [0001] The invention relates to the technical field of gas preparation, in particular to a method and device for preparing a gas that can replace sulfur hexafluoride for running-in tests. Background technique [0002] Sulfur hexafluoride, as an ultra-high voltage insulating material, is widely used in the gas insulation of electronic and electrical equipment. However, sulfur hexafluoride gas, carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, and perfluorocarbons are collectively called the "six major greenhouse gases" that affect the greenhouse effect, of which CO2 has the greatest impact on the greenhouse effect, accounting for 60%. The impact of sulfur hexafluoride gas accounts for only 0.1%, but the impact of a molecule of sulfur hexafluoride gas on the greenhouse effect is 25,000 times that of carbon dioxide molecules. At the same time, the life of sulfur hexafluoride gas emitted in the atmosphere is long, about 3400 years. Today, about 21 bil...

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Problems solved by technology

[0003] At the same time, in high-voltage electrical equipment, the mechanical running-in of the inflatable unit is an indispensable part of production inspection, and the process of "vacuumizing → inflating sulfur hexafluoride → recovering sulfur hexafluoride" in this process takes a long time, which also restricts With the improvement of production efficiency

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