Large valve and large-diameter pipeline pre-assembly pup joint manufacturing and hoisting method

Abstract

The invention discloses a large valve and large-diameter pipeline pre-assembly pup joint manufacturing and hoisting method. The manufacturing and hoisting method is characterized in that a prefabricated segment and a pre-assembly entirety are manufactured in a ground machining field, and the pre-assembly entirety is hoisted in place with a vertical transportation machine to be connected with an installed overhead large-diameter pipeline in a butt-joint welding mode; the method comprises the technological processes of construction preparing, prefabricated segment manufacturing, pre-assembly entirety manufacturing, pre-assembly entirety hoisting, butt-joint welding of the pre-assembly entirety and the installed overhead pipeline and checking and accepting. The hoisting method has the advantages that the tedious and high-difficulty high-altitude operation process is simplified and completed in the ground machining field, and therefore the problems that in traditional construction, the construction processes are tedious, the construction period is long, the high-altitude operation construction operation surface requirement is high, and the welding and installing quality is difficult to guarantee are solved; the whole construction process is in a safe, stable and controllable state, the installation precision is high, the construction period can be shortened, the construction efficiency is improved, the labor and material cost is reduced, and the economic benefit is significant.

Description

technical field [0001] The invention relates to a pipeline installation and construction method, in particular to a method for making and hoisting a large-scale valve short-connected with a large-diameter pipeline and pre-assembled as a whole. Background technique [0002] With the increasingly severe global energy supply crisis and the increasing requirements of urban residents for indoor living and office environments, water source heat pump cooling and heating technology has received higher attention and development. Water source heat pump centralized cooling and heating can provide urban public buildings with The cold and heat source of the air conditioner adopts the form of electric refrigeration + river water source heat pump + ice storage system for cooling in summer, and the river water source heat pump for heating in winter. The cooling and heating range can reach 2 to 3 million square meters. [0003] Water source heat pump centralized cooling and heating projects ...

AI Technical Summary

Problems solved by technology

[0004] 1. The process is cumbersome and the construction period is long;

[0005] 2. The high-altitude operation requires a large construction operation surface. The welding of large-diameter pipes and flanges, and the installation of large-diameter pipes and large valves are all high-altitude operations, which are difficult and difficult to guarantee quality;

[0006] 3. At the same time, there are many safety hazards in working at heights

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