Whole-series oil-free SF6 gas recovering and filling device

Abstract

The invention discloses a whole-series oil-free SF6 gas recovering and filling device. The whole-series oil-free SF6 gas recovering and filling device comprises a first vacuum pump, a second vacuum pump, a first ball valve, a second ball valve, a first check valve, a second check valve, a negative-pressure recycling machine, a compressor, an electromagnetic valve, a safety exhaust valve and pipelines, wherein an inlet of the first ball valve is connected with an inlet of the second ball valve, an outlet of the first ball valve is connected with the suction end of the first vacuum pump, an exhaust end of the first vacuum pump is connected with the suction end of the second vacuum pump, the inlet end of the safety exhaust valve is connected to the pipeline between the first vacuum pump and the second vacuum pump, the exhaust end of the second vacuum pump is open, an outlet of the second ball valve is connected to an inlet of the electromagnetic valve, an outlet of the electromagnetic valve is connected with the negative-pressure recycling machine through the pipeline, the negative-pressure recycling machine is connected with an inlet of the compressor through the second check valve and the pipeline, the inlet end of the first check valve is connected with the inlet pipeline of the electromagnetic valve, and the exhaust end of the first check valve is connected to the inlet pipeline of the compressor. The whole-series oil-free SF6 gas recovering and filling device has the advantages that SF6 gas is prevented from being in contact with oil, and the influence of the oil on the quality of the SF6 gas is avoided in theory.

Description

technical field [0001] The invention belongs to the technical field of gas recovery, and relates to a gas recovery and inflator, in particular to a full-series oil-free SF6 gas recovery and inflator. Background technique [0002] At present, as an insulating and arc-extinguishing medium, there is no other efficient way to replace SF6 gas from the perspectives of technology, economy and ecology. SF6 gas has been widely used in electrical equipment. From the perspective of application fields, SF6 circuit breakers are the most important field, and have basically replaced oil circuit breakers with voltage levels of 110kV and above. In addition, it also includes SF6 combined electrical equipment, SF6 current and voltage transformers and small-capacity transformers. From the development of various countries, it is an inevitable trend for SF6 gas to replace insulating oil as arc extinguishing and insulating medium. Especially when the ultra-high voltage reaches more than 500,000...

AI Technical Summary

Problems solved by technology

Even if the anti-oil return solenoid valve is installed, it cannot be ruled out that the anti-oil return solenoid valve fails, or other factors cause the lubricating oil to enter the high-pressure switch, and the consequences are also disastrous!

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