Method and system for calculating gravity center position of valve in nuclear power station pipeline system

The invention discloses a method and system for calculating the gravity center position of a valve in a nuclear power station pipeline system, and the method comprises the steps: obtaining the data information of a plurality of valves in the pipeline system, building a valve data information base, building a valve coordinate system according to the valve drawing of each valve in the base, and calculating the gravity center position of the valve based on the gravity center position of the valve. Determining a valve gravity center position coordinate matrix of the valve under the valve coordinate system; according to a nuclear power station pipeline design drawing, a pipeline system reference coordinate system is established, and arrangement information of all pipelines, valve position numbers of a plurality of valves and valve rod direction information are obtained; establishing a transformation relation between a pipeline system reference coordinate system and a valve coordinate system; and determining a valv