Self-balance type hoisting tool for steel containment module of nuclear power plant

Abstract

The invention provides a self-balance type hoisting tool for a steel containment module of a nuclear power plant. Three fixed hoisting points are arranged on the steel containment module; n pulley hoisting points are uniformly arranged on an arc line between two adjacent fixed hoisting points at intervals; a hoisting plate of a distributor is welded inside a cylinder; each of 3n+3 balance pulleys is fixed on the circumference of the cylinder through a branch beam and corresponds to one of the pulley hoisting points or one of the fixed hoisting points; a steel wire rope sequentially penetrates through the balance pulleys on the distributor, and pulleys at the pulley hoisting points corresponding to the balance pulleys or the fixed hoisting points on the steel containment module, so that the distributor is connected with the steel containment module. A hoisting beam is eliminated, so that the problems of storage, transportation and the like of the hoisting beam are solved; the dead weight of the hoisting tool is greatly reduced, and the hoisting capacity of a hoist is released; the stress balance of all hoisting points can be automatically realized, the hoisting difficulty can be greatly reduced, and the hoisting time can be greatly shortened.

Description

technical field [0001] The invention relates to hoisting and transportation technology, in particular to a self-balancing sling for nuclear power plant steel containment shell modules. Background technique [0002] Steel containment is an important structure of AP1000 nuclear power plant, with a diameter of about 40m, the total height is about 70m, and the wall thickness is about 45mm. It can be divided into modules such as bottom head, cylinder ring section, and top head. The weight of each steel containment module ranges from 600t to 800t. The steel containment module has the characteristics of large volume, heavy weight, and easy deformation. In order to realize the hoisting of such special items, it is necessary to design a special hoisting tool. [0003] The existing steel containment module spreader adopts such as figure 2 The suspension beam type structure shown is made up of distributor 1, steel wire rope 2, octagonal suspension beam 4 and adjustable pull rod 4 et...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned hanging beam spreader has the following disadvantages: (1) The large hanging beam makes it inconvenient to store and transport at the construction site of the nuclear power plant; (2) The heavy lifting beam (about 100t) occupies a considerable lifting capacity of the crane; ( 3) In order to ensure that the force of each lifting point is balanced, it is necessary to repeatedly test the lifting-adjustment, and the lifting process is cumbersome and time-consuming; (4) It is difficult to set the lifting point when lifting the top head

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