Three-way and two-way switching wind shielding device and sealing determining method thereof

The invention discloses a three-way and two-way switching wind shielding device and a sealing determining method.The three-way and two-way switching wind shielding device comprises a baffle part and a lifting device, the baffle part comprises a baffle, rod pieces and a supporting table, the four rod pieces are arranged on the lower end face of the baffle in a square shape, and the upper ends of the four rod pieces are connected with the lower end face of the baffle; the lower ends of the four rod pieces are welded to the supporting table. The lifting device comprises a lifting table, a lead screw, a disc and a base, the lower end of the lead screw is fixedly arranged in the middle of the upper end face of the base, the disc is in threaded connection with the middle of the lead screw, the lifting table is placed on the disc, the upper end of the lifting table is in threaded connection with the lower end of the supporting table, and the upper end of the lead screw penetrates through the lifting table and the su