Underwater composite trailing cable emergency shearing mechanism

The invention discloses an underwater composite trailing cable emergency shearing mechanism. The shearing mechanism comprises a fixing base, a streamline cable overturning frame, a shearing mechanismbody, a knife rest and a tension induction device. After the knife rest and the fixing base are fixed, a rectangular through hole allowing a trailing cable to pass is formed, and the tension inductiondevice is fixedly mounted on the cable outlet side of the knife rest and used for monitoring the tension of the trailing cable in real time. The streamline cable overturning frame is fixedly mountedon the cable inlet side of the knife rest, and the trailing cable enters the through hole formed by the knife rest and the fixing base in the preset direction through the streamline cable overturningframe. The shearing mechanism body is mounted on the knife rest, and when actual tension obtained after conversion of tension inducted by the tension induction device is higher than a set value of thebearing capacity of a traili