Mobile Sulfur Hexafluoride and Carbon Tetrafluoride Mixed Gas Rapid Recovery Gas Supply Device

Abstract

A mobile device for rapid recovery and supplementation of a sulfur hexafluoride-carbon tetrafluoride gas mixture comprises a gas mixture recovery system, a gas mixture separation system, a refrigerating unit, a pressurizing charging system dedicated to sulfur hexafluoride, and a pressurizing charging system dedicated to carbon tetrafluoride, a gas mixture distributing-charging system and a vacuum pumping system. A gas outlet of the gas mixture recovery system is connected to a gas inlet of the gas mixture separation system. A gas outlet of the gas mixture separation system is connected to a gas inlet of the pressurizing charging system dedicated to carbon tetrafluoride. A liquid outlet of the gas mixture separation system is connected to a liquid inlet of the pressurizing charging system dedicated to sulfur hexafluoride. The mobile device for rapid recovery and supplementation of the sulfur hexafluoride-carbon tetrafluoride gas mixture realizes the functions of on-site rapid recovery of the insulating gas mixture, simple separation of the gas mixture, respective storage of the separated gases, and on-site high-precision dynamic gas distribution and supplementation. Gas supplementation is realized by means of the gas mixture distributing-charging system, thereby providing rapid, efficient and accurate distribution of gases of desired proportions and also covering the shortages of a commonly used differential-pressure gas supplementation method in accuracy and efficiency.

Description

technical field [0001] The invention belongs to the technical field of maintenance of high-voltage switchgear with mixed insulating gas in low-temperature areas, and in particular relates to a mobile gas-replenishing device for rapid recovery of mixed gas of sulfur hexafluoride and carbon tetrafluoride. Background technique [0002] Sulfur hexafluoride (SF 6 ) gas is a gas with very stable chemical properties. As an excellent insulating and arc-extinguishing medium, it is widely used in various electrical equipment. To guarantee SF 6 Normal operation of electrical equipment, SF sealed inside the equipment 6 Gas needs to maintain a certain pressure, and SF 6 The operating characteristics of gases are significantly affected by changes in ambient temperature. In northern my country and some plateau areas, extreme low temperatures below -40°C often occur in winter. Under low temperature conditions, SF 6 SF in electrical equipment 6 The gas density will gradually decrease, ...

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Problems solved by technology

At present, the common SF in my country 6 The supplementary gas of the mixed insulating gas is mostly supplemented by the partial pressure method, which not only increases the number of supplementary gas connected to the electrical equipment, but also makes it difficult to accurately control the mixing ratio of the two gases through the partial pressure, so as to supply the supplementary gas to the electrical equipment of the mixed insulating gas. bring difficulties

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