A compound expansion joint with preloading mechanism for gas turbine system

Abstract

The invention discloses a compound belt prepressing mechanism expansion joint for a gas turbine system. The expansion joint is characterized by comprising a corrugated pipe (1), one end of the corrugated pipe (1) is connected with one end of a first connecting pipe (3), and the other end of the corrugated pipe (1) is connected with one end of a conic pipe assembly (2); and a lining barrel (5) is arranged on the inner side of the corrugated pipe (1), one end of the lining barrel (5) is connected to the inner wall of the first connecting pipe (3), the other end of the lining barrel (5) is located on the inner side of the conic pipe assembly (2), and the two ends of a pull rod assembly (11) are connected to the inner walls of the lining barrel (5) and the conic pipe assembly (2) respectively. By the adoption of the compound belt prepressing mechanism expansion joint, the reliability of a product is high, vibration resistance is good, and the mass of the product is low; the expansion joint is provided with a pre-position-change mechanism and a transport and installation device, so that field installation and displacement adjustment are convenient; and an outer cover is detachable, so that in-service inspection is facilitated, the caliber of the product is large and is over DN2000, and field pipeline butt joint installation is facilitated through annular boards arranged at the left end and the right end.

Description

technical field [0001] The present invention relates to an expansion joint for the exhaust diffuser section of a gas turbine for compensating and adjusting thermal expansion and vibration between the gas turbine and the exhaust section. Background technique [0002] At present, the existing expansion joints used in the gas turbine exhaust diffusion section to compensate and adjust the thermal expansion and vibration between the gas turbine and the exhaust section are composed of two sections of bellows and an intermediate connecting pipe. There are 2 sections between the bellows and the intermediate connecting pipe. The ring weld seam makes the reliability of the expansion joint not good enough, especially the anti-vibration ability, and the weight of the product is also relatively large. Contents of the invention [0003] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and provide a compound expansion joint with a prel...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing expansion joints used in the gas turbine exhaust diffusion section to compensate and adjust the thermal expansion and vibration between the gas turbine and the exhaust section are composed of two sections of bellows and an intermediate connecting pipe. There are 2 sections between the bellows and the intermediate connecting pipe. Girth weld, which makes the reliability of the expansion joint not good enough, especially the anti-vibration ability, and the weight of the product is also relatively large

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