Connection method for installation of large-diameter pipe

Abstract

The invention relates to the field of engineering construction for pipe installation, in particular to a connection method for installation of a large-diameter pipe. A circular seam of a metal steel pipe connector is full-welded to form a composite connector in the circumferential direction according to the characteristic of small axis stress of the large-diameter engineering pipeline, namely a ribbed plate is adopted for the connector or the local circular seam of the connector is welded to counteract the influence generated when the axis of the pipe is pulled; then, a flexible glass fiber reinforced plastic connector is formed on the outer wall of the connector by means of epoxy and glass wool cloth or carbon fiber cloth to assist in axis stress of the pipe, prevent pipe seepage and meetthe requirement for linear temperature stretchable deformation of the pipe; gaps in the inner wall of the connector are filled with epoxy asphalt filler to be trimmed and smoothened under the condition that the protection of a pipe coating is not destroyed, so that unstressed butt joint of the connector is completed to form composite connector connection; and through such connector connection, the capacity to resist temperature stretchable deformation in the axis direction can be improved.

Description

technical field [0001] The technology relates to the construction field of pipeline installation engineering, in particular to a connection method for large-diameter pipeline installation. Background technique [0002] Under normal circumstances, pipe installation welding has a wide range of applications and can be used for the connection of various diameters of metal pipes; other connection methods are selected according to the size of the pipe diameter and the requirements for disassembly, among which screw connection, adhesive connection, thin-walled stainless steel Pipe connections, copper pipe connections, hot melt connections, ferrule connections are mostly used for small diameter pipes and special pipe connections; welded connections and socket connections are mostly used for large diameter pipe connections; flange connections and groove connections are more suitable for small and medium-sized pipes. Diameter pipe connection, but also easy to install and remove. [0...

AI Technical Summary

Problems solved by technology

For the connection of steel pipe joints with larger diameters, because the circular weld seam to be welded is long, not only the construction cost of the weld seam is high, but the flaw detection is difficult to detect, and the simultaneous operation of adjacent weld seams interferes with the arc flash and hurts the eyes of the operator, which affects the construction. progress, and the welders must obtain the corresponding qualifications, and the construction skills are high; when PCCP and other material pipes are used for socket connection, the ellipticity of the pipe forming is required to be high, otherwise it will be necessary to adjust the pipe several times for butt joint trial, and it is easy to cause The rubber water stop ring is damaged, making it difficult to install

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