Pressure release protection device with buffer function

The utility model discloses a pressure release protection device with buffer function, including barrel, end cap, shearing piece, O shape sealing washer, buffer block, the sealed pad and the 2nd O shape sealing washer, the buffer block is installed in the step hole of barrel department and will be sealed up to fill up and compresses tightly, and a groove that has the installation to shear is opened to the buffer block upper end, and the lower extreme is opened there is the air vent, shears an upper end and opens and have the shearing groove, and end cap and barrel fastening connection will be sheared and compress tightly on the buffer block end cap upper end equipartition pressure release hole. When gas pressure in the barrel risees rapidly, on the gas flow is used in behind the buffer block again and shears, shearing and splitting shearing the groove deal with, shear a journal stirrup and compressed tightly on the buffer block by the end cap, shear all the other parts and move to the locking of end cap tank bottom down in the gas effect, gas discharges outside the container through the pressure release hole. The utility model discloses small, light in weight, simple structure, the pressure release uniformity is good, can be used to ultra -temperature, superhigh pressure environment, and its pressure release precision can be controlled within 10%.