Sulfur hexafluoride gas connecting piece

Abstract

The invention discloses a sulfur hexafluoride gas connecting piece which comprises a cylinder, a column core, a first joint, a second joint and a pressure gage; two ends of the cylinder are open; thecolumn core is arranged in the cylinder; one end of each of the first joint and the second joint is arranged on the cylinder; the pressure gage is arranged at the other end of the first joint; the column core can move in the cylinder in the axial direction of the column core, so that the end part of the column core is selectively propped against the ejection pin of a high pressure equipment joint;a gas guiding chamber is formed between the inner wall of the cylinder and the outer wall of the column core; a gas passage is formed in the column core; and the gas passage, the first joint and thesecond joint communicate with the gas guiding chamber. When the sulfur hexafluoride gas connecting piece needs to be detached from the high pressure equipment joint, at first, the column core is enabled to be separated from the ejection pin of the high pressure equipment joint, the entire pipeline is still in the closed state even if the ejection pin of the high pressure equipment joint cannot reset normally, and the pressure gage displays a higher pressure value, so that a working staff does not carry out next detaching operation to prevent sudden gas leakage.

Description

technical field [0001] The invention relates to the technical field of electric facilities, in particular to a sulfur hexafluoride gas connector. Background technique [0002] As one of the most important control and protection equipment in the power system, the high-voltage isolating switch is required to be able to reliably cut and close high-voltage circuits and conversion lines in actual operation. The high-voltage isolating switch has a direct impact on the safe and reliable operation of the system. Influence, high-voltage isolation switches and other high-voltage equipment are usually insulated by sulfur hexafluoride gas. Sulfur hexafluoride is an inert gas with good insulation performance and arc extinguishing performance. In order to ensure insulation performance, it is necessary to regularly or irregularly The inflated high-pressure equipment is tested for indicators such as the pressure and composition of sulfur hexafluoride gas. When the sulfur hexafluoride gas in...

AI Technical Summary

Problems solved by technology

[0003] At present, when performing operations such as gas detection, inflating or supplementing gas on high-pressure equipment filled with sulfur hexafluoride gas, traditional connectors are usually used to connect with high-voltage equipment connectors. Open the thimble of the high-voltage equipment connector, and when the connection is unscrewed after the operation is completed, the thimble may not return in real time, resulting in the leakage of sulfur hexafluoride gas that has been charged into the equipment, causing an emergency power outage. Safe and stable operation has been compromised

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