Storage tank anti-backfire air suction cover

The utility model provides a storage tank anti-backfire air suction hood, and relates to the technical field of storage tanks, the storage tank anti-backfire air suction hood comprises a storage tank, an air outlet pipe, an inner hood, an outer hood, a connecting pipe and an air supply pipeline, the inner hood and the air outlet pipe are combined to form a first cavity, and the outer hood and the inner hood are combined to form a second cavity; during use, VOCs gas in the storage tank is discharged from the gas outlet pipe, and under the action of an external fan, the VOCs gas firstly enters a first cavity in the inner cover, then enters a second cavity outside the inner cover, finally enters the gas supply pipeline from the connecting pipe, is conveyed to an external treatment system for combustion and then is discharged, so that centralized collection treatment of the VOCs gas is realized; if pipeline backfire detonation occurs, flames can be sprayed out from the second cavity and cannot directly enter the