Main pump measuring and mounting method of AP1000 nuclear power station

Abstract

The invention relates to the field of construction of nuclear power stations. In order to guarantee clearance precision between a main pump body and a pump housing, the invention provides a main pump measuring and mounting method of an AP1000 nuclear power station. The method comprises the following steps of: laying adaptor measurement points and adaptor modeling measurement points on a suction adaptor; establishing a three-dimensional model of the suction adaptor according to measurement results, and performing analysis calculation on the shape deviation of the suction adaptor; laying measurement control points, and measuring the pump housing; establishing a mounting coordinate system of the suction adaptor, and enabling the suction adaptor to be mounted in the pump housing; repeatedly performing measurement on the adaptor measurement points, the adaptor modeling measurement points and pump housing mounting periphery positioning points; performing fitted positioning on the pump housing, and calculating the levelness of a pump housing flange; measuring conversion control points on the main pump body and pump body modeling measurement points; and establishing a mounting measurement coordinate system and a three-dimensional model of the main pump body so as to complete the measurement and mounting of the main pump body. Through the adoption of the method disclosed by the invention, the main pump of the AP1000 nuclear power station can be measured and mounted, and mounting accuracy is high.

Description

technical field [0001] The invention relates to the field of nuclear power plant construction, in particular to a method for measuring and installing a main pump in an AP1000 nuclear power plant. Background technique [0002] At present, when installing the main pump of a conventional reactor-type nuclear power plant, traditional measurement methods such as total station measurement or line drop measurement are usually used to measure coordinate positioning or installation concentricity. Among them, the total station measurement can only complete the plane position coordinate measurement, and the plane measurement accuracy is about 1mm, it is difficult to realize the three-dimensional space measurement, and the measurement accuracy cannot be guaranteed; the line drop measurement is also limited to the centering measurement of regular-shaped components Or concentricity measurement, and the measurement accuracy can only reach 1mm / m. [0003] The installation method of the mai...

AI Technical Summary

Problems solved by technology

Among them, the total station measurement can only complete the plane position coordinate measurement, and the plane measurement accuracy is about 1mm, it is difficult to realize the three-dimensional space measurement, and the measurement accuracy cannot be guaranteed; the line drop measurement is also limited to the centering measurement of regular-shaped components Or concentricity measurement, and the measurement accuracy can only reach 1mm / m

[0003] The installation method of the main pump in the AP1000 nuclear power plant is different from the installation method of the main pump in the conventional nuclear power plant. There must be a certain gap between the pump body of the main pump, the suction adapter and the pump casing, and the accuracy of the gap is very high. ;During the lifting process of the main pump body, due to the narrow space and obstructed line of sight, the above gap cannot be directly monitored, and the collision between the main pump body and the suction adapter may occur, resulting in the diffuser on the top of the main pump body and the suction damaged adapter

Images