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Seismic performance of flexible expansion joint

In Telescopic device In the process of using, it is not the problem of the product itself that is easy to damage the product, but the environment in the process of using the product. For example, long time exposure to high temperature or high humidity will damage the telescopic products in a long time. In case of geological disasters such as earthquake and debris flow, the normal use of the products will be affected.

In the geological environment, the use of flexible expansion products is more, because the seismic performance of flexible expansion device is better than other expansion products. If the flexible expansion device is used in the pipeline, when the geological disaster comes, the good seismic performance of the product will reduce the impact of geological disaster on the pipeline.

Why can a flexible telescopic device achieve this effect?

It is difficult to determine the seismic wave and stratum mobility damage during an earthquake. The landform, topography, soil liquefaction and fault of urban water supply pipeline are different. The soil movement and relative displacement caused by seismic waves are the main reasons for the destruction of underground pipelines, and the Rayleigh wave of surface wave has great influence on the damage of buried pipelines, because it has tensile and compressive effects on buried pipes. According to the data introduced by Beijing Municipal Engineering Research Institute, the results of seismic simulation test on flexural pipeline show that when the deflection value is ± 1.2mm, the rigid joint will start to leak, while the flexible joint cast iron pipe (flexible joint) will leak Casing expansion device )When the lateral vibration deflection reaches ± 31.5 mm to ± 43.5 mm, the pipeline still has no seepage, leakage and damage (Japanese standard is ± 30 mm).

The flexible casing expansion device produced by Shanghai Huanjing has protected the safe operation of the pipeline in natural disasters, and our flexible casing expansion device also has the functions of compensating and absorbing the axial, transverse and angular thermal deformation of the absorption pipeline, absorbing the vibration of the equipment, reducing the impact of the equipment vibration on the pipeline, and absorbing the deformation of the pipeline caused by earthquake and ground subsidence.

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