Plugging device and method for hydraulic test of prestressed steel cylinder concrete pipeline

Abstract

The invention discloses a hydraulic test plugging device for a prestressed steel cylinder concrete pipeline, which relates to the field of installation and construction of prestressed steel cylinder concrete pipelines. It includes exhaust pipe, socket steel parts, short pipe, flat cover plug, jack, steel plate, concrete backrest, embedded steel plate, a pressure gauge is located on the exhaust pipe, and the bottom end of the exhaust pipe is vertically connected On the upper surface of the short pipe, the socket steel part includes a socket steel ring, a socket steel ring, and a stiffener; the socket steel ring is connected to a prestressed steel cylinder concrete pipe, and the short pipe is connected to the The steel ring of the socket is welded at the steel ring of the socket; the other end of the short pipe is welded on the flat cover plug, the jack is connected to the flat cover plug and the concrete backrest, and the embedded steel plate is distributed in the concrete backrest . It overcomes the disadvantages of labor and time-consuming, deformation, unsafety and low economic efficiency in the prior art. The invention also discloses the plugging method for the hydraulic test of the prestressed steel cylinder concrete pipeline.

Description

technical field [0001] The invention relates to the field of installation and construction of prestressed steel cylinder concrete pipes, in particular to a hydraulic test plugging device for prestressed steel cylinder concrete pipes. The invention also relates to a method of operating the prestressed steel cylinder concrete pipeline hydrostatic test plugging device. Background technique [0002] Prestressed Concrete Cylinder Pipe (referred to as PCCP or Prestressed Concrete Cylinder Pipe) is a composite pipe with high strength, high impermeability and high sealing performance. It combines thin steel plate, high-strength concrete, high-strength It is made of raw and auxiliary materials such as mortar and rubber sealing ring. The pipeline is especially suitable for large-diameter, high-pressure and high-covered soil water supply projects. The PCCP pipe adopts socket connection, and is sealed by installing a rubber sealing ring at the groove of the socket. According to the r...

AI Technical Summary

Problems solved by technology

After the hydrostatic test is completed, it is necessary to manually cut from the manhole pipe, which is labor-intensive and time-consuming. Workers perform cutting operations inside the pipe with little air circulation, which is extremely unsafe and endangers health.

And manual cutting may also have adverse effects such as deformation of the steel press fitting pipe

The plugging plate is welded inside the steel pressure fitting pipe, and the displacement or deformation of the PCCP pipe used as the backrest cannot be observed during the hydrostatic test, resulting in inaccurate test of the allowable water seepage method of the hydrostatic test

In addition, after the hydraulic test is completed, it is necessary to manually enter the interior of the pipeline to cut the blocking plate into small pieces, resulting in the blocking plate can only be used once and cannot be recycled, and the economic efficiency is low

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