Multiple two-direction sleeve expansion joint

Abstract

The invention discloses a multiple two-direction sleeve expansion joint. According to the technical scheme, the multiple two-direction sleeve expansion joint comprises a moving pipe, a compressing flange, an outer casing pipe, sealing filling, an anti-dropping ring and a compressing bolt, wherein the moving pipe is externally connected with the outer casing pipe, the sealing filling serves as the interlayer between the moving pipe and the outer casing pipe, the compressing flange is arranged at the end of the outer casing pipe and provided with the compressing bolt, and the anti-dropping ring is arranged at the end, located in the outer casing pipe, of the moving pipe. The multiple two-direction sleeve expansion joint has the advantages that flowing friction resistance, caused by the multiple two-direction sleeve expansion joint, of fluid is small, and the multiple two-direction sleeve expansion joint is compact in structure, long in service life and low in construction cost; sliding surfaces are good in anti-corrosion performance under a saline water environment or a saline solution environment or other environments because of having being subjected to special treatment; when the sealing effect is weakened, the flange can be tightened again or the bolt is unloosened, one or two layers of sealing rings are arranged, and the multiple two-direction sleeve expansion joint can continue being used; the two-direction characteristic means sliding sleeves at the two ends of the expansion joint can freely slide no matter from which end media flow, and accordingly two-direction compensation is achieved, and the amount of compensation is increased.

Description

technical field [0001] The invention relates to the application field of expansion joints, in particular to a compound bidirectional sleeve expansion joint. Background technique [0002] Because of the thermal expansion and contraction of the pipeline, for the pipeline, the stress and push-pull force of the pipe wall must be generated; the stress of the pipe wall affects the strength of the pipeline, and when the push-pull force increases, the fixing bracket of the pipeline must be made very large , to withstand the push-pull force generated by the expansion and contraction of the pipeline; therefore, the variable opening method of the compensation of the expansion joint is used to reduce the stress and thrust of the pipe wall. Water pipelines, gas pipelines and low-pressure steam pipelines require relatively large amounts of compensation and are generally long in length, so compensators such as bellows are not suitable. Contents of the invention [0003] The object of th...

AI Technical Summary

Problems solved by technology

Water pipelines, gas pipelines and low-pressure steam pipelines require a large amount of compensation, and generally have a long length, so compensators such as bellows are not suitable

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