Overhaul protection method for high-temperature valve

The invention relates to the technical field of valves, in particular to an overhaul protection method for a high-temperature valve, which comprises the following steps of: opening a water inlet of a water inlet storage bag in advance during overhaul, switching a cooling circulating water path of the high-temperature valve to a temporary closed circulating water cooling device by adopting a quick conversion joint, and cooling the high-temperature valve by adopting the temporary closed circulating water cooling device; the temporary closed circulating water cooling device comprises an inlet water storage bag, the inlet water storage bag is connected with a high-temperature valve cooling water inlet through a water inlet pipeline, and a high-temperature valve cooling water outlet is connected with a return water storage bag through a water outlet pipeline. The valve water-cooling device can be quickly connected with a high-temperature valve through the metal hose and the quick connector to form an external valv