Electric pressure relief device

The utility model discloses an electric pressure relief device which comprises a detection control circuit, a driving device connected with the detection control circuit and a linkage mechanism connected with the driving device. The detection control circuit, the driving device and the linkage mechanism are all arranged in a valve body, a magnetic force attraction rod is arranged in the valve body, and a permanent fixer matched with the magnetic force attraction rod is arranged on the linkage mechanism. The electric pressure relief device further comprises a hand switch which is connected with the driving device. An electric opening mode, a mechanical opening mode and a manual opening mode can be achieved, pressure relief can be achieved by adopting different opening modes in different situations, and when power is supplied normally, working is conducted in the electric opening mode with accurate control over pressure; when the power is supplied abnormally, the mechanical opening mode can be adopted; the manu