Multi-station rotating disc type pressure maintaining device

The invention discloses a multi-station rotating disc type pressure maintaining device which comprises a rotating disc, a pressure maintaining assembly and a pressure maintaining assembly. The upper plane of the rotating disc is provided with a plurality of installation stations in the circumferential direction. The objective table is located below the rotary table, a plurality of pressure sensors are arranged on the objective table in the circumferential direction of the objective table, and a supporting part used for bearing a filter element is arranged at one end of each pressure sensor; the supporting structure is located between the turntable and the objective table, the upper end of the supporting structure is connected with the turntable, and the lower end is connected with the objective table; each pressure maintaining mechanism comprises a pressing part and a lifting driving structure for driving the pressing part to do lifting motion, the lifting driving structures are fixed to the installation stat