Shell for GIS and processing technology of shell

Abstract

The invention discloses a shell for a GIS. The shell comprises a transverse pipe and a vertical pipe, wherein the fracture surface of one end of each of the transverse pipe and the vertical pipe is a 45-degree section; the 45-degree sections of the transverse pipe and the vertical pipe are identically connected with each other and are fixed in a welding manner; and the other ends of the transverse pipe and the vertical pipe are connected with flanges respectively. The shell is formed by butt welding of two aluminum pipes which are integrally molded; the shell is simple in structure, convenient to weld, low in cost, good in sealing effect and applicable to engineering batch production of the GIS; the performance of a product is improved when the cost is saved; the production efficiency is improved; and the market competitiveness is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of high-voltage switchgear, and in particular relates to a shell for GIS and a processing technology thereof. Background technique [0002] At present, gas-insulated metal-enclosed switchgear, referred to as GIS, is generally used for high-voltage switches with voltage levels of 126kV and above. GIS has been widely used in recent years. Compared with the original open switch used in substations, GIS has the advantages of small footprint, maintenance-free, and high reliability. Its contacts are all in the shell and are insulated by sulfur hexafluoride gas. , can prevent the atmosphere and rainwater from corroding the contacts, and has reliable performance. The components that make up GIS are a large number of shells and conductors. Since the high-voltage live part is enclosed in a metal shell filled with sulfur hexafluoride gas at a certain pressure, the airtightness of the shell is highly required. [0003...

AI Technical Summary

Problems solved by technology

[0003] The existing ordinary GIS shell mainly includes a cover plate, an aluminum tube, a flange, and a bolt. During production and processing, the aluminum plate is rolled into a tubular shape on a plate rolling machine, and then the aluminum tube is obtained by straight seam welding. The processed aluminum tube Then welded with the flange, the flange is connected with the cover plate by bolts, and a sealing ring is added in the middle to seal the gas. The welding process of this structure is complicated, there are many welds, the possibility of air leakage is large, and the processing and production costs are high.

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