The invention provides an oil-immersed
transformer. When explosion venting accidents happen to the oil-immersed
transformer,
liquid carbon dioxide in the
liquid carbon dioxide container can be sprayed into the
oil tank through the liquid pumping
pipe and the spraying
pipe, a fire source is effectively extinguished,
oxygen supply is restrained, and a
combustion chain of a fire disaster is blocked; and the
liquid carbon dioxide is a good electric insulator, so that the
electric shock risk in the fire extinguishing process can be reduced. Meanwhile, a pressure relief device of the oil-immersed
transformer can be rapidly opened, pressure in the
oil tank is rapidly released, and explosion hazards are reduced. The
flue gas treatment device can treat explosion gas discharged by the pressure relief device, harmful substances are converted into harmless substances, and the harmless substances are discharged to a safe area, so that the safety of the surrounding environment and equipment is protected, and the
pollution to the environment and the injury to personnel are reduced. That is, according to the oil-immersed transformer disclosed by the invention, the liquid
carbon dioxide fire extinguishing design, explosion venting and
smoke treatment design are introduced, so that the safety of explosion venting accidents of the oil-immersed transformer and the fire extinguishing effect are improved.