Bellow expansion joint with warning device

Abstract

The invention relates to a bellow expansion joint with a warning device, which comprises connecting pipes, flanges, a double-layer bellows and a flow guide pipe, wherein two ends of the bellows are respectively provided with a left connecting pipe and a right connecting pipe; the outer sides of the left connecting pipe and the right connecting pipe are respectively connected with a left flange and a right flange; the left flange and the right flange are connected by a pull rod and nuts; one end of the flow guide pipe is connected and fixed to the inner surface of the left connecting pipe; the other end of the flow guide pipe stretches into the right connecting pipe; a communicating pipe is arranged at the connection part between the double-layer bellows and one of the connecting pipes; the communicating pipe is communicated with a cavity formed by a middle interlayer of the double-layer bellows; and the warning device is arranged on the end part of the communicating pipe and comprises a gas, temperature sensor and pressure sensor. According to the invention, the warning device is arranged on the end part of the communicating pipe; once leakage happens to an inner layer of the double-layer bellows of the expansion joint, and the warning device can find a leakage point in time and sends a warning signal, so that the expansion joint can be rapidly repaired or replaced. The bellow expansion joint with the warning device is suitable for a pipeline used for conveying an inflammable, explosive or corrosive fluid, so that the safety of the pipeline can be ensured, and the normal operation of the pipeline can be guaranteed.

Description

technical field [0001] The invention relates to a pipeline telescopic expansion compensation device, in particular to a corrugated expansion joint with an alarm device. Background technique [0002] At present, the existing heating pipelines need to install several expansion joints in sections to compensate for the expansion and contraction of the pipeline, especially for long-distance heating pipelines used to transport high-temperature and high-pressure media. The wall thickness of the expansion joints is relatively large and the strength is relatively high. . During use, due to the large expansion and contraction of the heating pipe and the large number of waves of the bellows, the bellows of the expansion joint are prone to local leakage due to fatigue. Therefore, it is necessary to detect leakage faults and determine the leakage point in time, so as to facilitate rapid repair or replacement of expansion joints and ensure the normal operation of pipelines. Contents of...

AI Technical Summary

Problems solved by technology

During use, due to the large amount of expansion and contraction generated by the heating pipe and the large number of waves of the bellows, the bellows of the expansion joint are prone to local leakage due to fatigue

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