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Method for hoisting heavy large covers for towers

A hoisting method and a large cover technology, which are applied in the direction of transportation and packaging, load hanging components, etc., can solve the problems that affect the maintenance of the synthetic tower, the problem of large cover hoisting, and the corrosion of the peg rings, etc., to achieve simple production and low input cost , does not affect the effect of the construction period

Active Publication Date: 2018-08-24
CHINA NAT CHEM ENG THIRD CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hoisting of the large cover depends on the four stud rings installed on the top. If the synthetic tower is used for a long time, it is easy to cause corrosion and damage to the stud rings. Once the stud rings are damaged, the hoisting of the large cover will become a problem
[0003] The traditional hoisting method usually uses 4 stud rings to lift. If the stud rings are damaged, they must be re-customized, and the cycle of re-customizing the stud rings is long, usually about 15-30 days, which seriously affects the synthetic tower. maintenance work

Method used

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  • Method for hoisting heavy large covers for towers
  • Method for hoisting heavy large covers for towers
  • Method for hoisting heavy large covers for towers

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Embodiment Construction

[0037] A method for hoisting rings of a heavy-duty tower cover of the present invention will be further described in detail in conjunction with the accompanying drawings and specific embodiments:

[0038] A ring hoisting method for a heavy-duty large cover of a tower, comprising the following steps:

[0039] 1) see figure 1 , remove all M105 nuts 11 on the large cover 12;

[0040] 2) see Figure 4 , use a 12mm thick steel plate to make 4 pieces of 150×100mm top wire U-shaped gaskets Ⅰ241, and then use a 1mm thick stainless steel plate to make 56 pieces of 150×100mm top wire U-shaped gaskets Ⅱ242:

[0041] 3) see figure 1 and 2 , and slowly rotate the four jacking wires 14 evenly installed on the 12 circles of the large cover to lift the large cover 12 upward;

[0042] 4) Divide 4 pieces of jackscrew U-shaped spacers Ⅰ 241 into four groups, one for each group; divide 56 pieces of top-screw U-shaped spacers Ⅱ 242 into four groups, with 14 pieces in each group;

[0043] 5) ...

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Abstract

The invention discloses a method for hoisting heavy large covers for towers by the aid of lifting rings. The method includes steps of detaching nuts; manufacturing 4 U-shaped gaskets I from steel plates with the sizes of 12 mm and manufacturing 56 U-shaped gaskets II from stainless steel plates with the thicknesses of 1mm; jacking the large covers by the aid of jackscrews; dividing the gaskets I and II into four groups; firmly bundling non-U-shaped groove ends of the corresponding gaskets I and II to form a first gasket group, a second gasket group, a third gasket group and a fourth gasket group; placing the first gasket group, the second gasket group, the third gasket group and the fourth gasket group in gaps between each large cover and a barrel; detaching connecting bolts near damaged cotter lifting rings and exposing bolt holes; symmetrically hanging two hand pulling blocks on two undamaged cotter lifting rings; allowing two ends of perforation binding steel wire rope to penetrateeach bolt hole and fastening every two corresponding tip noses with each other; folding and hanging steel wire ropes on the perforation binding steel wire ropes; hanging the hand pulling blocks and the steel wire ropes on lifting hooks and lifting the large covers; placing the large covers on ground sleepers; completely carrying out maintenance and reassembling the large covers. The method has theadvantages that the method is easy to operate and free of risks, and is safe and reliable, smooth maintenance work can be guaranteed, and influence on maintenance construction periods can be prevented.

Description

technical field [0001] The invention relates to the field of dismantling and installation of an ammonia synthesis tower, more specifically, it relates to a method for hoisting a heavy-duty tower cover when the peg suspension ring installed on the large cover (cover head) is damaged. Background technique [0002] For ammonia synthesis towers with high temperature, high pressure and special media, the large cover is an important component of the synthesis tower. During the installation or maintenance of the synthesis tower, the removal and installation of the large cover is an indispensable step. The big cover of the synthesis tower is very heavy, the light one is about 20 tons, and the heavy one is about 40 tons. The hoisting of the large cover depends on the four stud rings installed on the top. If the synthetic tower is used for a long time, it is easy to cause corrosion and damage to the stud rings. Once the stud rings are damaged, the hoisting of the large cover will beco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C1/12
CPCB66C1/12
Inventor 张俊忠
Owner CHINA NAT CHEM ENG THIRD CONSTR
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