Pressure releasing device of completely-closed gas insulation high-pressure switch device

Abstract

The invention discloses a pressure releasing device of a completely-closed gas insulation high-pressure switch device. The pressure releasing device of the completely-closed gas insulation high-pressure switch device comprises a releasing cylinder body with a flange structure, an upper clamping machine, a lower clamping machine and a reversed-arch rupture disk. The pressure releasing device is characterized in that the reversed-arch rupture disk is fixedly connected to the opened end of the releasing cylinder body through the upper clamping machine and the lower clamping machine in a fixedly welding mode, the concave face of the reversed-arch rupture disk faces the side, with the flange structure, of the releasing cylinder body, the releasing device is fixedly connected with an air chamber wall through the flange structure, a double-screw bolt and a nut, and a sealing ring is arranged between the flange structure and the air chamber wall. The pressure releasing device of the completely-closed gas insulation high-pressure switch device is good in anti-fatigue performance, the bearable operation temperature ranges from -30 DEG C to 40 DEG C in an alternating mode, the rupture performance of the rupture disk is not influenced, when the time spent on the process that the barometric pressure rises to the rupture pressure is shorter than 0.3s, the rupture performance is stable, a rupture pressure error satisfies the requirement for the released pressure-intensity accuracy, the releasing rate is no larger than 1% per year, and maintenance and repair are simple and convenient.

Description

technical field [0001] The invention relates to a pressure release device, in particular to a pressure release device for a fully enclosed gas-insulated high-voltage switchgear. Background technique [0002] Fully enclosed gas-insulated high-voltage switchgear (Cubicle type Gas Insulated Switchgear) is internationally referred to as C-GIS. A new type of switchgear that implements functions such as control, protection, measurement, monitoring, and communication under normal circumstances is different from the gas chamber configuration and requirements of gas insulated metal-enclosed switchgear (Gas Insulated Switchgear) (GIS for short), and the SF of C-GIS 6 The air pressure in the gas chamber is relatively low, generally a fraction of that of GIS. The air chamber where the load removal switch is located is filled with SF 6 In addition, other parts are insulated with traditional air, which is suitable for substations and switchyards. [0003] A pressure relief device must ...

AI Technical Summary

Problems solved by technology

However, these pressure release devices are not suitable for the safety needs of C-GIS. The main performance is that they are greatly affected by temperature and have poor fatigue resistance. , The accuracy of blast pressure judgment is not high, and the leakage rate is greater than 5% / year

In order to increase the judgment accuracy and fatigue resistance of the pressure release device, some products have added electronic detection and stabilization equipment, which undoubtedly increases the cost of the equipment

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