Method for building upper semi-circular arch roof lining of industrial furnace pipeline

Abstract

The invention discloses a method for building an upper semi-circular arch roof lining of an industrial furnace pipeline, which comprises the following steps of: manufacturing a special last tire and asupport of the the special last tire to achieve masonry, wherein the last tire comprises a first last tire piece, a second last tire piece and a last tire strip, the diameter of the first last tire piece is larger than that of the second last tire piece, assembling nails and supporting the last tire, wherein the first last tire piece and the second last tire piece are positioned at the inner sideand outer side in the masonry direction, an end head of the inner side of the last tire strip is overlapped with a front ring brick, and the last tire is fixed after the built brick is inspected; building heat insulating layer bricks and working layer bricks on the supported last tire from inside to outside, building the bricks according to a ring until a closing brick is completely inserted, andfinishing the building of the whole ring; lowering down the last tire and moving out the last tire, checking the masonry effect, after the masonry is qualified, the last tire is erected at the position of a next ring according to the same method, and the next ring of bricks is built until the lining of the semi-circular arch roof of the whole pipeline is completely built. According to the method,the building blocks are visually controllable in the masonry process, the mortar fullness and the final masonry position of the building blocks are ensured, the masonry quality is ensured, and the service life is prolonged.

Description

technical field [0001] The invention relates to a method for building an inner lining of a semi-circular vault on an industrial furnace pipeline. Background technique [0002] For a long time, in order to prolong the service life of industrial furnaces and improve the quality of lining installation, people have explored new ideas in various aspects and achieved good results. The piping system is an important part of the industrial furnace. The piping plays different roles in the industrial furnace and its lining structure is also different. The different lining structures have different installation methods. [0003] Due to the fully enclosed structural characteristics of industrial furnace pipes, clay bricks (high alumina bricks) for the working layer are generally used to build the upper semicircular vault of the pipeline, and then lightweight clay bricks (lightweight bricks) for the heat insulation layer are built. High alumina bricks or mullite insulation bricks, etc.),...

AI Technical Summary

Problems solved by technology

The masonry quality of the working layer in this way is guaranteed, but the masonry quality of the heat insulation layer is significantly reduced, resulting in air leakage from the pipes and redness of the shell, which affects the normal production and operation of the industrial furnace; in order to emphasize the masonry quality of the heat insulation layer, there are also advanced The construction method of building the heat insulation layer and then building the working layer, this construction sequence has caused great difficulties for the building of the working layer, because when building the working layer, there are heat-insulating bricks on the top of the pushed bricks, and there are tires on the bottom. It is difficult to ensure the normal operation of each brick in a limited arc-shaped space. This masonry method seems to follow the quality rule of concealing the heat insulation layer first and then building the working layer. However, during the masonry process Blocks are prone to defects such as decreased mortar plumpness, different sizes of mortar joints, swaying blocks, and loose locking of the door lock bricks. The final result is air leakage and redness of the pipe shell, which affects normal production.

If the method of masonry supported by bamboo strips in the Hogovin hot blast stove technology is adopted, the method is suitable for pipes below φ800mm through experiments, and it is difficult to realize pipes larger than φ800mm, because the number of semicircular vault blocks on pipes larger than φ800mm is generally 15 Since the self-weight of the block and the radial force of the block are not on the same straight line, it is difficult to find the center of gravity of the block at the support point of the bamboo strips, and the forces cannot cancel each other out. The support of the bamboo strips may easily cause the block to tilt, Opening gray seams and other issues

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