Integrated nitrogen injection oxygen control fireproof system device

The invention relates to the technical field of oil tank fire prevention, in particular to an integrated nitrogen-injection oxygen-control fireproof system device. The device comprises a nitrogen tankand an oil storage tank; an oil-gas probe, an exhaust pipe and a drainage guide pipe are sequentially embedded in the inner wall of the oil storage tank from top to bottom; the inner wall of the oilstorage tank is fixedly connected with a sealing plate and sealing cloth, the surface of the sealing plate is movably connected with a floating disc, the surface of the floating disc is fixedly connected with the surface of the sealing cloth, and the surface of the oil storage tank is fixedly connected with a protective shell. According to the invention, an oil gas concentration detector is connected with a PLC, so when the oil gas concentration in the gap among the sealing cloth, the sealing plate and the oil storage tank exceeds the standard, the oil gas concentration detector can transmit asignal to the PLC, and no