Steel containment vessel end sealing plate turnover device and operation method

Abstract

The invention provides a steel containment vessel end sealing plate turnover device and an operation method. The steel containment vessel end sealing plate turnover device comprises a concave-side storage support and a convex-side storage support which are arranged in parallel; a first turnover support and a second turnover support are fixedly arranged in the middle of the two supports; turnover fixtures are hinged onto the first turnover support and the second turnover support; each turnover fixture comprises a convex-side fixture and a concave-side fixture; two ends of the convex-side fixtures and the concave-side fixtures are fixedly connected through first connecting plates and second connecting plates; and the second connecting plates are hinged to the top parts of the turnover supports. According to the steel containment vessel end sealing plate turnover device, steel containment vessel end sealing plate turnover operation can be accomplished by a single lifting machine, a turnover procedure is simple, the deformation of an end sealing plate can be effectively reduced during the turnover process, and a safety factor is high.

Description

technical field [0001] The invention relates to the field of nuclear power construction equipment, in particular to a steel containment head plate turning device and an operating method. Background technique [0002] During the construction of the steel containment vessel (hereinafter referred to as CV) head plate of AP1000 nuclear power plant, a large number of accessories need to be welded on the inside and outside of the head plate. A single nuclear island needs to flip 64 head plates, and the maximum weight of a single piece is 12t; the unique double curvature structure of the head plate requires strict control of its deformation during the flip process. [0003] At present, the conventional method is double-machine lifting, that is, two cranes are used to cooperate to complete the turning operation of the head plate. The disadvantages are: [0004] (1) Double-machine lifting requires close cooperation between the two cranes, the number of head plates is large, the weig...

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Problems solved by technology

[0004] (1) Double-machine lifting requires close cooperation between the two cranes, the number of head plates is large, the weight is heavy, frequent turning and hoisting operations, and great potential safety hazards;

[0005] (2) During the overturning process of the head plate, it needs to be overturned by 180°. During the lifting process of the two machines, it is necessary to repeatedly unhook and hook up. There are many construction steps and low efficiency;

[0006] (3) Due to the large weight of a single piece, which can reach 12t, during the lifting operation, it is necessary to manually adjust its position, which is inconvenient to operate;

[0007] (4) Since there are only two lifting points, it is easy to generate stress concentration during the lifting process, which will lead to local deformation, affect the double curvature structure, and then affect the overall structure of the equipment;

[0008] (4) The number of flips is too many, and the shift fee for the crane is too high

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