Device for measuring oil in water quality of oil field

The invention relates to the technical field of detection devices, in particular to a device for measuring oil in oil field water quality, which comprises a detection box, a driving rod, a plugging disc, a fan-shaped net, a first net plate and a shifting assembly, the driving rod slides downwards to drive the fan-shaped net to completely enter a water layer, and then drives the fan-shaped net to rotate; the first screen plates in every two adjacent sets of stirring units extrude each other, solid petroleum between the two first screen plates connected to the fan-shaped net is extruded, liquid petroleum doped in the solid petroleum flows out, and the liquid petroleum penetrates through the first screen plates or the fan-shaped net under the action of buoyancy of the liquid petroleum. Then a sucking pump communicated with the second opening is started, the pressure in the detection cavity is reduced, the dissolved amount of gaseous petroleum in water is reduced, corresponding contents are calculated according t