A π-type Boiler Rear Water and Upper Part Whole Combination Lifting and Positioning Technology

Abstract

The invention discloses an integral combining and hoisting in-position technology for a two-pass boiler rear water upper part. The technology comprises the construction steps that firstly, combination pre-preparation is conducted; secondly, furnace arch tube panels, an inner structure, rear water vertical small sheets and a rear water outlet header are combined in a combination site; thirdly, a rear water hanging tube outlet header and a hanging tube are combined on a boiler 30-meter temporary bracket platform; fourthly, furnace arches are spliced to simulate platform manufacturing; fifthly, the rear water vertical small sheets and the rear water outlet header are secondarily combined; sixthly, furnace arch inlet header big opening welding and pre-storing are conducted; seventhly, furnace arch assembly inner frame installation is conducted; eighthly, a rear water vertical tube panel assembly and a furnace arch assembly are secondarily combined; ninthly, the rear water hanging tube outlet header, the hanging tube assembly, the furnace arch tube panels and a frame assembly are fixed in a penetrating manner; tenthly, the lower portion of the rear water hanging tube assembly and the rear water outlet header are combined and welded; eleventhly, assembly rigidity and soft strengthening is conducted; and twelvethly, integral assembly hoisting is conducted in place. According to the integral combining, hoisting and in-position technology, when a spare part hoisting method is selected, the occupied time for field large hoisting machines is effectively shortened, the occupation frequency for the field large hoisting machines is effectively reduced, and meanwhile the aerial operation workload is directly reduced.

Description

technical field [0001] The present invention relates to a thermal power unit π-type boiler rear water upper part, which includes the overall combined lifting and placing construction process of the water cooling wall in the flame angle area and its frame structure, especially relates to the water cooling wall and support of the rear water upper part (including the flame bending angle) The ground of the frame (including part of the suspension) is integrally combined and hoisted into place as a whole. Background technique [0002] Due to its irregular shape, the upper water part behind the π-type boiler (including the water-cooled wall of the flame angle) is the first group of large parts encountered in the hoisting operation of the water-cooled wall, and it is also the first difficulty in the on-site hoisting operation. The key link in the quality control of water-cooled wall installation. Under normal circumstances, the overall weight of the rear water upper part (including...

AI Technical Summary

Problems solved by technology

This method not only increases the high-altitude work time of counterparts and welding personnel, but also doubles the difficulty of scaffolding, and the installation quality and accuracy are not easy to control

At the same time, due to the cumbersome process, it is also unfavorable to guarantee the installation period.