A large-scale valve and large-diameter pipeline pre-spliced ​​short connection manufacturing and hoisting method

Abstract

A large-scale valve and large-diameter pipeline pre-assembled short connection manufacturing and hoisting method, characterized in that: the manufacturing and hoisting method is to make a prefabricated section and a pre-assembled whole in a ground processing yard, and then use a vertical transport machine to pre-assemble The method of butt welding the overall hoisting in place and the installed overhead large-diameter pipeline; the process flow is: construction preparation → prefabricated section production → pre-assembled overall production → pre-assembled overall hoisting → pre-assembled overall and installed overhead pipeline Butt welding → Acceptance. This hoisting method simplifies the cumbersome and difficult high-altitude operation process to the ground processing site, thereby solving the problems of traditional construction procedures such as cumbersome construction procedures, long construction period, large requirements for high-altitude operations, and difficulty in guaranteeing welding and installation quality: The whole construction process is in a safe, stable and controllable state, with high installation precision, which can shorten the construction period, improve construction efficiency, save labor and material costs, and have significant economic benefits.

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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