A Repairing Method for the Collapsed Lining of a Hot Air Duct

Abstract

The invention discloses a repairing method for a warm-air pipe collapse lining. A construction platform is erected above a collapse position; a hole is formed in a warm air main pipe is formed to check the damage condition of the lining, and a damage area at the collapse position is calculated; the suspended part of the lining at the collapse position and a warm air main pipe shell at the position are dismounted, an opening structure is formed at the collapse position of the lining, and the interior of a warm air branch pipe is cleaned; a stainless steel tray is manufactured according the damage area of the collapse position of the lining and the diameter of the warm air branch pipe, the manufactured stainless steel tray can be connected with the warm air branch pipe into a whole, and reinforcing steel bars are vertically welded to the stainless steel tray; the stainless steel tray and the damage position of the warm air branch pipe are welded, and the reinforcing steel bars extend out of the warm air branch pipe; the stainless steel tray is covered with a flame retardant coating; the removed warm air main pipe shell is installed again, a pouring hole is reserved, and refractory castable is inwards poured through the pouring hole; and after pouring is completed 2 h to 3 h, the parts, extending out of the warm air branch pipe, of the reinforcing steel bars are cut off, welding repairing of the preserved pouring hole is carried out, and repairing is carried out.

Description

technical field [0001] The invention relates to the technical field of pipeline repair, in particular to a method for repairing the collapsed inner lining of a hot air pipeline. Background technique [0002] The inner lining of the hot air duct usually adopts the structure of spray coating combined with brick lining. If the surface of the hot air duct has abnormal temperature, it is usually used to open grouting holes at the abnormal temperature part to prevent or alleviate the abnormal temperature. [0003] At the intersection of the hot air main pipe and the hot air branch pipe, the brick lining is mostly in the form of composite bricks. Under the influence of high temperature and air flow for a long time, the upper brick lining here will loosen or even collapse. At this time, due to the collapse of the inner lining, the hot air There are damaged openings on the branch pipe. If the hole grouting method is used to repair the hot air branch pipe, other methods must be used t...

AI Technical Summary

Problems solved by technology

[0003] At the intersection of the hot air main pipe and the hot air branch pipe, the brick lining is mostly in the form of composite bricks. Under the influence of high temperature and air flow for a long time, the upper brick lining here will loosen or even collapse. At this time, due to the collapse of the inner lining, the hot air There are damaged openings on the branch pipe. If the hole grouting method is used to repair it, the hot air branch pipe will be blocked. Other methods must be used to repair the lining

Images