CN-116591541-B - Three-pipe bundling self-standing steel chimney mounting method

CN116591541BCN 116591541 BCN116591541 BCN 116591541BCN-116591541-B

Abstract

The invention relates to a method for installing a three-pipe cluster self-standing steel chimney. The installation method comprises the following steps of S1, firstly using a crane to hoist and weld an upper section chimney barrel, S2, installing an upper platform ladder and accessory components on the upper section chimney barrel, S3, installing a lifting mechanism at the bottom of the upper section chimney barrel, S4, lifting the upper section chimney barrel by using the lifting mechanism, and installing a large chimney by adopting a hydraulic lifting flip-chip method through a positive installation and flip-chip combined installation method, thereby reducing the installation height, completing the installation of the ultrahigh chimney by using a crane hoisting structure with less than 150 tons, and having the advantages of no need of large hoisting equipment, less overhead working amount, simple welding protection measures, easy installation operation, low construction cost and reliable safety quality assurance measures.

Inventors

JI LU
PAN YUNDONG
CAO CHUNHONG
LUO HUITIAN

Assignees

中国化学工程第三建设有限公司

Dates

Publication Date: 20260508
Application Date: 20230427

Claims (2)

1. The method for installing the three-pipe cluster self-standing steel chimney is characterized by comprising the following steps of: s1, hoisting and welding an upper section chimney barrel body by using a crane; S2, installing an upper platform ladder and accessory components on the upper section chimney barrel; s3, installing a lifting mechanism (a) at the bottom of the upper section chimney barrel; s4, lifting the upper section chimney barrel by using a lifting mechanism (a); S5, after the upper section chimney barrel is lifted in place, assembling the middle section chimney barrel, measuring and correcting the spatial position of the middle section chimney barrel, and welding; S6, dismantling the lifting mechanism (a) on the upper section chimney barrel and installing the lifting mechanism (a) on the middle section chimney barrel; s7, assembling a lower section chimney barrel by using the same method of installing the middle section chimney barrel; the lifting mechanism (a) in the S3 comprises a lifting frame (1), a lifting rod (2) and a climbing assembly, wherein the lifting frame (1) is used for fixing the lifting rod (2); The climbing assembly comprises a climbing machine, a hydraulic pump station and a PLC control system, and the climbing machine moves on a lifting rod (2) under the control of the hydraulic pump station and the PLC control system to realize the lifting action; The climbing machine comprises an upper plate (3) and a lower plate (4) which are parallel to each other, two double-acting hydraulic cylinders (5) are arranged between the upper plate (3) and the lower plate (4), the double-acting hydraulic cylinders (5) are used for changing the distance between the upper plate (3) and the lower plate (4), clamping devices (6) for clamping lifting rods (2) are arranged on the upper plate (3) and the lower plate (4), and clamping grooves (7) corresponding to the clamping devices (6) are formed in the lifting rods (2); two stop mechanisms are arranged on the lower plate (4) and used for stopping the falling of the climbing machine when the clamp holder (6) fails; The stop mechanism comprises a rotating shaft (11) arranged on a lower plate (4), a roller (12) is concentrically arranged on the rotating shaft (11), the roller (12) is in surface contact with a lifting rod (2), a flywheel (13) and a rotating plate (14) which concentrically rotate are arranged on the rotating shaft (11), the rotating plate (14) is connected with the rotating shaft (11) through the flywheel (13), a stop plate (15) is arranged on the rotating plate (14), the stop plate (15) is in surface contact with the lifting rod (2), and a reset spring (16) is arranged between the rotating plate (14) and the lower plate (4).
2. The three-tube bundled free-standing steel chimney mounting method as claimed in claim 1, wherein the lifting bar (2) comprises a positioning bar (8), a transition bar (9) and a connecting bar (10).

Description

Three-pipe bundling self-standing steel chimney mounting method Technical Field The invention belongs to the technical field of chimney installation, and particularly relates to a three-pipe bundling self-standing steel chimney installation method. Background A chimney is a structure that provides ventilation for hot flue gases or fumes. The height of the stack affects its ability to transport flue gas to the external environment through the stack effect. The chemical industry, metallurgy and electric power industry all need to discharge through the chimney, in order to reach emission standard, according to the project requirement, the chimney design is high for high altitude construction is many, and the security risk is high, and the use of big crane is high simultaneously, has improved the installation cost. Disclosure of Invention The invention aims to solve the problems in the prior art and provides a three-pipe bundling self-standing steel chimney mounting method. The invention realizes the above purpose through the following technical scheme: a three-pipe cluster self-standing steel chimney mounting method comprises the following steps: s1, hoisting and welding an upper section chimney barrel body by using a crane; S2, installing an upper platform ladder and accessory components on the upper section chimney barrel; S3, installing a lifting mechanism at the bottom of the upper section chimney barrel; s4, lifting the upper section chimney barrel by using a lifting mechanism; S5, after the upper section chimney barrel is lifted in place, assembling the middle section chimney barrel, measuring and correcting the spatial position of the middle section chimney barrel, and welding; S6, removing the lifting mechanism on the upper section chimney barrel and installing the lifting mechanism on the middle section chimney barrel; s7, assembling the lower section chimney barrel by using the same method for installing the middle section chimney barrel. Preferably, the lifting mechanism in S3 includes a lifting frame, a lifting rod and a climbing assembly, and the lifting frame is used for fixing the lifting rod; The climbing assembly comprises a climbing machine, a hydraulic pump station and a PLC control system, and the climbing machine moves on a lifting rod under the control of the hydraulic pump station and the PLC control system to realize the lifting action. Preferably, the climbing machine comprises an upper plate and a lower plate which are parallel to each other, two double-acting hydraulic cylinders are arranged between the upper plate and the lower plate, the double-acting hydraulic cylinders are used for changing the distance between the upper plate and the lower plate, holders for holding lifting rods are arranged on the upper plate and the lower plate, and clamping grooves corresponding to the holders are formed in the lifting rods. Preferably, the lifting rod comprises a positioning rod, a transition rod and a connecting rod. Preferably, the lower plate is provided with two stop mechanisms, and the stop mechanisms are used for stopping the falling of the climbing machine when the clamp holder fails; the stop mechanism comprises a rotating shaft arranged on the lower plate, a roller is concentrically arranged on the rotating shaft, the roller is in surface contact with the lifting rod, a flywheel and a rotating plate which concentrically rotate are arranged on the rotating shaft, the rotating plate is connected with the rotating shaft through the flywheel, a stop plate is arranged on the rotating plate, the stop plate is in surface contact with the lifting rod, and a reset spring is arranged between the rotating plate and the lower plate. The invention has the beneficial effects that: According to the invention, the large chimney is installed by adopting a hydraulic lifting flip-chip method through a mounting method combining forward mounting and flip-chip mounting, so that the installation height is reduced, the ultra-high chimney can be installed by using a crane lifting organization construction of less than 150 tons, and the method has the advantages of no need of large lifting equipment, less high-altitude operation amount, simple welding protection measures, easy installation operation, low construction cost and reliable safety quality assurance measures. Drawings FIG. 1 is a schematic view of the overall structure of a chimney of the present invention; FIG. 2 is a schematic view of the arrangement of a lifting mechanism for mounting an upper section chimney barrel in the invention; FIG. 3 is a schematic view of the arrangement of the lifting mechanism of the middle section chimney barrel installation in the invention; FIG. 4 is a schematic view of the arrangement of a lifting mechanism for installing a lower section chimney barrel in the invention; FIG. 5 is a schematic view of a lifting mechanism according to the present invention; FIG. 6 is a schematic view of the positional relationship of