MULPIC cooling emergency device, control method and control system

The invention discloses an MULPIC cooling emergency device, a control method and a control system. The MULPIC cooling emergency device comprises water inlet stop valve arranged at a water inlet of any manifold, wherein all the water inlet stop valves are connected to a first PLC module, so that linkage can be achieved when the first PLC module is started. According to the MULPIC cooling emergency device, on one hand, the first PLC module and all the water inlet stop valves can be used for rapidly adjusting the working mode of an MULPIC cooling system, and no water enters any manifold on the basis of stop of all the manifolds by the water inlet stop valves in the non-water-cooling mode, so that abnormal water spraying caused by faults of the MULPIC cooling system can be effectively avoided, and the quality of a steel rolling process is ensured; and on the other hand, a worker can manually operate a single water inlet stop valve when the PLC module is closed, and maintenance and replacement of local parts are a