Valve assembly for on-line verification of pipeline pressure gauge

The valve assembly comprises a four-way valve, four movable joints and two screwed plugs, the four-way valve comprises a connecting plate, two arc-shaped plug pieces, a magnetic piece, a valve seat and four protruding parts, the connecting plate is arranged in a cavity of a valve body and connected with the valve seat in a pivoted mode, and the magnetic piece is arranged in the cavity of the valve body and connected with the valve seat in a pivoted mode. The two arc-shaped blocking pieces are connected with the two ends of the connecting plate correspondingly and abut against the inner circumferential face of the cavity of the valve body. Through the arrangement of the rotatable arc-shaped plug and the connecting plate, the cavity of the valve body can be divided into the first chamber and the second chamber, the positions of the first chamber and the second chamber can be flexibly adjusted according to needs, the flow direction of fluid can be changed, a pressure gauge does not need to be detached from a val