Corrugated expansion joint

A bellows and compensator technology, which is applied to expansion compensation devices, pipe components, pipes/pipe joints/fittings for pipelines, etc., can solve problems such as large internal stress, failure of bellows seals, and large thickness differences. Achieve the effect of prolonging service life, ensuring sealing effect and improving reliability

Inactive Publication Date: 2014-12-31
TAIZHOU LISHAN MACHINERY
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Problems solved by technology

Since the bellows are very thin and the flanges are very thick, the thickness of the two is very different. It is usually easy to weld the bellows through during the welding process of the bellows and the flanges, and the internal stress of such welding parts is relatively large, which is easy to use during use. Causes the seal failure of the bellows

Method used

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  • Corrugated expansion joint
  • Corrugated expansion joint

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Embodiment Construction

[0015] The present invention will be further described below according to the accompanying drawings and in conjunction with the embodiments.

[0016] The bellows compensator shown in the accompanying drawings includes flange 1 and bellows 2; flange 1 and bellows 2 are connected through connecting pipe 3; connecting pipe 3 is connected to the end face of flange 1 in a sealed connection; in this embodiment, flange 1 The end face is provided with a groove, and the connecting pipe 3 is embedded in the groove.

[0017] There is a spigot in the connecting port hole between the connecting pipe 3 and the bellows 2, and the bellows 2 is sealed in the spigot; the axial gap between the end of the connecting pipe 3 and the bellows 2 is filled with silica gel 4.

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Abstract

The invention discloses a corrugated expansion joint, which comprises flanges and a corrugated pipe; each flange is connected with the corrugated pipe through a connecting pipe; each connecting pipe is hermetically connected with the end face of the corresponding flange. The further improvement is that a groove is formed in the end face of each flange; each connecting pipe is embedded into the corresponding groove; a rabbet is formed in the connecting end hole of each connecting pipe and the corrugated pipe; the corrugated pipe is hermetically connected with the interiors of the rabbets; silica gel fills an axial gap between the end part of each connecting pipe and the corrugated pipe. According to the corrugated expansion joint disclosed by the invention, the welding reliability is obviously improved, the sealing effect is effectively ensured, and the service life is obviously prolonged.

Description

technical field [0001] The invention relates to a compensation device for a pipeline, in particular to a GIS bellows compensator used in the high-voltage switch industry. Background technique [0002] The GIS bellows compensator used in the high-voltage switch industry includes flanges and bellows. Generally, the bellows are directly connected to the wall of the inner hole of the flange by welding and sealing. Because the bellows are very thin and the flange is very thick, the thickness difference between the two is very large. It is usually easy to weld the bellows through during the welding process of the bellows and the flange, and the internal stress of such welding parts is relatively large, so it is easy to Cause the seal of the bellows to fail. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention proposes a bellows compensator which significantly improves the welding reliability, effectively ensures the sealing effect an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L51/02
CPCF16L51/025
Inventor 孙仲权王锋邰兴平
Owner TAIZHOU LISHAN MACHINERY
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