Arch-breaker is applied in light industry、chemical industry、food and other industries . Many powder、small particle or small granules will gather together by arching and bridging,then there will be empty at the low position of silo,materials can not be dropped down .So we design such a device which can breaking the arching as well as can make materials dropping down when screw shaft rotates .When Arch-breaker stop working ,it can locking materials ,and this function is as well as stop valves . Size of arch-breaker is designed as per silo’s dimension and transporting capacity .