Cooling device of oil-immersed transformer and oil-immersed transformer

The invention provides a cooling device of an oil-immersed transformer and the oil-immersed transformer, and the cooling device comprises a cooling pipe which is arranged in a body of the oil-immersed transformer; the helium refrigerating machine is arranged outside the body and provides high-pressure helium for the cooling pipe so as to absorb heat of transformer oil in the body; and the fire extinguishing mechanism comprises a spray head, and the spray head communicates with the helium refrigerating machine and is used for selectively spraying high-pressure helium to the body so as to cool the body and isolate the body from surrounding air. According to the cooling device, high-pressure helium is provided for the cooling pipe and the spray head of the fire extinguishing mechanism through the helium refrigerating machine, and the functions of cooling and fire extinguishing of the oil-immersed transformer are achieved. 本公开提供了一种油浸式变压器的冷却装置和油浸式变压器，冷却装置包括：冷却管，冷却管设置在油浸式变压器的本体内；氦气制冷机，氦气制冷机设置在本体外并为冷却管提供高压氦气以用于吸收本体内