Gas density relay and method for selecting width in manufacturing of Bourdon tube thereof

Abstract

The invention provides a gas density relay and a method for selecting width in manufacturing of a Bourdon tube thereof. The method comprises the step of matching the width and the inside diameter size range of the Bourdon tube, namely when the inside diameter is more than or equal to 25mm, the width of the Bourdon tube is between 12 and 30mm; when the inside diameter size is between 25 and 38mm, the width of the Bourdon tube is between 13.5 and 38mm; and when the inside diameter is between 55 and 80mm, the width of the Bourdon tube is between 20 and 40 mm. The gas density relay can be free from charging silicone oil, completely solves the problem of oil leakage, has the advantage of insusceptibility to vibration and can be well applied to SF6 electric equipment.

Description

technical field [0001] The invention relates to a relay, in particular to a relay used in SF 6 (Sulfur hexafluoride) Gas density relays on electrical equipment and methods of width selection for the manufacture of Baden tubes. Background technique [0002] SF 6 Electrical products have been widely used in the power sector, industrial and mining enterprises, and promoted the rapid development of the power industry. Guaranteed SF 6 The reliable and safe operation of electrical products has become one of the important tasks of the power sector. SF 6 The arc extinguishing medium and insulating medium of electrical products are SF 6 Gas, no air leakage can occur, if there is an air leakage, the SF cannot be guaranteed 6 Electrical products operate reliably and safely. So monitor SF 6 SF for electrical products 6 The density value is very necessary. Now used to monitor SF 6 Density generally adopts a mechanical pointer density relay, which has when SF 6 When an electri...

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Problems solved by technology

[0004] above SF 6 Although the micro switch used in the gas density relay has certain advantages, but due to this SF 6 The width of the Baden tube 6 used in the gas density relay is less than 19mm or even less than 19mm, and the strength is not enough. When the switch is opened and closed with strong vibration, it is easy to cause the adjustment rod to shift, and the adjustment rod is stuck or detached from the micro. The phenomenon of moving the switch operating arm cannot guarantee the reliable operation of the system

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