Dewar flask leakage detection alarm device with built-in refrigeration infrared detector assembly

The utility model discloses a Dewar flask leakage detection alarm device with a built-in refrigeration infrared detector assembly, and belongs to the technical field of infrared detectors. The device comprises a fixing fastener, arc-shaped threaded vertical plates, an upper cover, a first sealing ring, a second sealing ring and a refrigeration infrared detector, the fixing fastener is fixedly installed on the outer side wall of the Dewar flask, the first sealing ring is arranged between the outer side wall of the Dewar flask and the fixing fastener, at least four arc-shaped threaded vertical plates are installed on the top of the fixing fastener, and the upper cover is arranged on the upper cover. A second sealing ring is arranged in the upper cover, the upper cover is meshed with the four arc-shaped threaded vertical plates, the second sealing ring is tightly attached to the arc-shaped threaded vertical plates, and a refrigeration infrared detector is arranged in the upper cover. In order to solve the proble