Explosion wave shutter design and structural strength can withstand high intensity explosive shock wave case

Explosion-proof valve is to protect the front wave trenches engineering personnel protective equipment is one of the important survival. It is installed in the tunnel inlet and exhaust system of the head. Usually the shutter is open, trenches normal ventilation; after suffering a nuclear attack, the quick closing valve prevents the shock waves through the mouth of radioactive dust into the tunnel  electric transformer  inside to  Circuit breaker , equipment safety. Explosion wave shutter design and structural strength can withstand high intensity explosive shock wave case, within the fortifications on the tunnel personnel,  air circuit breaker  has played a crucial role. As foreign nuclear power development of weaponry to the United States, Russia, represented by nuclear states, and its missile hit accuracy are improved quickly. Such as: U.S. Minuteman ICBM Ⅲ roadbed, Russia SS.19 roadbed ICBM CEP reach 200m ~ 300m. It is estimated at 50 tons TNT equivalent touchdown burst conditions, positions at 240m radius from the explosion center, and its resistance at 25MPa, the survival probability of 54% (structure and equipment suffered minor damage, the device does not affect use); pair of precision-guided weapons in terms of a higher hit rate.