Fireproof flame-retardant breather valve for storage tank

The fireproof flame-retardant breather valve for the storage tank comprises a breather valve body, a connecting pipe and a flame-retardant pipe, the breather valve body communicates with the connecting pipe, one end of the connecting pipe extends out of the breather valve body, the flame-retardant pipe is connected to the open end of the connecting pipe, and a flame-retardant assembly is arranged in the flame-retardant pipe; the flame-retardant assembly comprises fireproof plates, a water conveying ring pipe and a liquid storage box, the two sides of the water conveying ring pipe are each provided with one fireproof plate, a water conveying opening is formed in the water conveying ring pipe, a water injection pipe is arranged between the water conveying ring pipe and the liquid storage box in a communicating mode, a water injection pump is arranged on the water injection pipe, and a water absorption layer is embedded in the inner ring wall of the water conveying ring pipe; the water absorption layer is attach