Installation tool and method for short supporting legs of bottom head of steel containment vessel of nuclear power station

Abstract

The invention belongs to the technical field of nuclear power station construction and provides an installation tool for short supporting legs of a bottom head of a steel containment vessel of a nuclear power station. The installation tool aims at solving the problems that current short supporting legs of the bottom head of the steel containment vessel are complex in localization and installation operation and low in efficiency. The installation tool for the short supporting legs of the bottom head of the steel containment vessel of the nuclear power station comprises a supporting frame and a rail. The rail penetrates the supporting frame in the direction perpendicular to the side face of the supporting frame. A transport vehicle is arranged on the rail. Each of the two sides of the rail is provided with a first supporting column, a second supporting column and a stop block. Fulcrums are arranged on the supporting frame and distributed on the two sides of the rail. Each stop block, the top end of the corresponding first supporting column, the top end of the corresponding second supporting column and the corresponding fulcrum are connected to form a curve the same as that of the structure of a BH1 board of the bottom head, wherein each stop block, the corresponding first supporting column, the corresponding second supporting column and the corresponding fulcrum are located on the same side of the rail. By the utilization of the tool, the short supporting legs can be rapidly and accurately located and installed, the construction difficulty is lowered, line production can be achieved, and the work efficiency is improved.

Description

Technical field [0001] The invention belongs to the technical field of nuclear power station construction, and specifically relates to a short leg installation tool and an installation method for the bottom head of a steel containment vessel of a nuclear power station. Background technique [0002] The steel containment is the inner shielding structure of the nuclear power plant reactor building and is one of the important equipment in the passive safety system, such as figure 1 As shown, the steel containment 10 includes a top head 12, a cylinder 11, and a bottom head 13. The cylinder 11 has a cylindrical structure. The top head 12 and the bottom head 13 are both semi-elliptical structures. The head 13 is assembled by 36 BH1 boards, 30 BH2 boards, 15 BH3 boards, and 1 BH4 board. The BH1 board is a hyperboloid melon board. The single board weight is about 12T, the arc length is 9560mm, and the width is 2988-3756mm. It has the characteristics of large size and heavier weight. The ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the current problem of complex positioning and installation of the short legs of the steel containment bottom head and low efficiency, the present invention proposes a tool for installing the short legs of the steel containment bottom head of a nuclear power plant, including a support frame and a track; The track passes through the support frame in a direction perpendicular to the side of the support frame, and the first support column, the second support column and the stopper are arranged on both sides of the track, and the support frame is provided with At least two fulcrums, the two fulcrums are distributed on both sides of the track, the stopper, the top of the first support column, the top of the second support column and the fulcrum on the same side of the track The connection forms the same arc as the BH1 plate structure of the bottom head, so that after the BH1 plate is placed on the first support column and the second support column, the bottom of the BH1 plate is against the stopper, and the The middle part of the BH1 board is attached to the first support column and the second support column, and the upper part of the BH1 board leans against the fulcrum

Images