Lifting method for basket barrel for nuclear power

Abstract

The invention discloses a lifting method for a basket barrel for nuclear power which can be most insusceptible to size of the basket barrel without welding. A plurality of supporting circles are mounted in the core barrel. Each supporting circle is formed by a plurality of arc support members connected end to end. A lifting hole used for penetration of a lifting steel wire is reserved on each support member. Lateral edge, near the inner wall of the basket barrel, of each support member extends radially along the basket barrel. A plurality of bolts are connected to each extended portion in a threaded manner respectively. The bottom of each bolt is abutted to the inner wall of the basket barrel. An end face at the end with margin of the core barrel is connected with the supporting circles at the end with margin of the basket barrel through a plurality of connection blocks. Lifting can be performed after the supporting circles and the connection blocks are mounted, penetrating the lifting steel wire through the lifting hole and fixing the supporting circles. By the method, the basket barrel can be lifted while the size of the basket barrel is guaranteed, and assembly is convenient and rapid.

Description

technical field [0001] The invention relates to a hoisting method for a hanging basket cylinder used in nuclear power. Background technique [0002] At present, the earth's fossil energy reserves are limited and cause pollution to the atmosphere, and the utilization rate of renewable energy is insufficient due to various restrictions. The world is facing problems such as energy shortage and environmental pollution. Nuclear power is developed as a safe, efficient and clean energy. can alleviate these problems. Therefore, the development prospect of nuclear power is very broad. [0003] Our company undertook the manufacture of metal reactor internal components of the high temperature gas-cooled reactor nuclear power plant demonstration project of Huaneng Shandong Shidaowan Nuclear Power Plant. The material of the equipment cylinder is 12Cr2Mo1R, the diameter of the cylinder is 5400mm, the roundness requirement is 6mm, and the cylindricity requirement is 8mm. However, the rou...

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Problems solved by technology

[0004] First, the welding of such materials (12Cr2Mo1R) requires preheating before welding, strict control of interlayer temperature during welding, and slow cooling to eliminate hydrogen after welding. The operation is very cumbersome, and the quality of the weld is difficult to guarantee. Affecting lifting safety, welding a lifting lug often takes a long time;

[0005] Second, because the welding lifting lug 2 will cause local deformation of the basket cylinder 1, it is difficult to guarantee the roundness and cylindricity required by this product;

[0006] Third, when hoisting, the four points of the hanging basket cylinder body 1 are stressed, and the circumferential force of the hanging basket cylinder 1 is uneven, which affects the product size;

[0007] Fourth, after the product is completed, the lifting lug 2 must be removed, and the polishing workload is quite large

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