Safe fireproof and explosion-proof device additionally arranged at connector of breathing tube of flammable and explosive storage tank

The invention discloses a safe fireproof and explosion-proof device additionally arranged at a connector of a breathing tube 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 operation flange of an upper shell is connected with a self-closing quick connector, the interior of the shell is divided into a public channel, a gas phase channel and a liquid phase channel, and spaces formed by the public channel, the gas phase channel and the liquid phase channel are of tubular structures. The space positions are coaxial pipe structures with each other, the space formed by the gas phase channel and the liquid phase channel is of a symmetrical structure, the public channel is provided with a valve element A, a steel solid filter screen, a core rod and a rod spring, and the gas phase channel is provided with an interface sleeve, an interface sleeve sealing piece, a gas phase explosion-proof barrel, a gas phase ex