Mechanical automatic pressure relief equipment for fire fighting

The utility model provides mechanical automatic pressure relief equipment for fire fighting, which belongs to the technical field of fire fighting machinery and comprises a mounting mechanism, a door sealing plate, an air inlet plate and a pressure relief mechanism, the door sealing plate and the air inlet plate are vertically arranged on the mounting mechanism at certain intervals, and the air inlet plate is arranged on the front side of the mounting mechanism to enable indoor air flow to enter the mounting mechanism. And the door opening mechanism is arranged on the rear side of the air inlet plate so as to open the door sealing plate, the door opening mechanism comprises a connecting frame and a driving assembly connected into the connecting frame, and the two sides of the connecting frame are rotationally connected with door jacking assemblies. The door sealing device has the advantages that during pressure relief, the baffle drives the spur rack to penetrate out of the connecting frame through the slidin