Composite safety explosion-proof device for breather pipe of flammable and explosive storage tank

The invention discloses a composite safety explosion-proof device for a breather pipe of a flammable and explosive storage tank, and belongs to the technical field of fuel oil and liquefied gas equipment. The device is characterized in that an explosion-proof core is mounted in an upper shell, a clamping seat A, a clamping spring A, a clamping seat B and a clamping spring B are arranged at the upper end and the lower end of the explosion-proof core respectively, the explosion-proof core is fixed and supported by the clamping seat A and the clamping seat B, and a valve core and a valve seat are sequentially mounted in a lower shell. The valve core is connected with the valve rod through a redundant connecting assembly, the valve rod is installed on an axial support, the axial support is fixed through a clamping spring C and a clamping spring D, the valve rod is provided with a spring on the lower side of the axial support, a sensing element is arranged on the upper side of the axial support, the clamping sprin