Fireproof check valve with umbrella-shaped fireproof temperature sensing device

The invention discloses a fireproof check valve with an umbrella-shaped fireproof temperature sensing device. The fireproof check valve comprises a metal cylinder, a check door plate and the umbrella-shaped fireproof temperature sensing device, wherein the umbrella-shaped fireproof temperature sensing device comprises a guide column, a positioning shaft, a spring and a sliding block; first connecting rods are symmetrically and rotationally connected to the sliding block; second connecting rods are symmetrically and rotationally connected to the two ends of the positioning shaft; one end of each first connecting rod is hinged to the middle of the corresponding second connecting rod; a first fuse link and a second fuse link which are bonded are arranged between the upper end of the guide column and the sliding block; the upper end of the first fuse link is connected with the upper end of the guide column; and the lower end of the second fuse link is connected with the sliding block. According to the fireproof c