The full name of the double flap valve hammer hammer flap valve, also known as the heavy hammer lock flap valve, double lock valve, double Current cinder valve, double hammer discharge valve, double layer hammer lock wind flap valve, double hammer flap cinder valve. Hammer double flap valve discharge can lock both the wind, is a use of the material weight for automatic discharging device, using ash silo cone, the sealing surface with beveled, cinder thoroughly, no wear, no Other transmission structure can be widely used in metallurgy, chemical, power, light industry, building materials, construction, mining, cement, food, food, industrial, engineering and other industries, as the various types of environmental protection equipment for unloading equipment and a variety of hopper mills, dryers, dust hopper bin unloading equipment and other equipment to prevent the Wind, blowing, so called double lock valve. Features: Double hammer flap valve with steel plate welded structure, counterweight bar self-reset mechanism, compact structure, stable and reliable work. Double hammer flap cinder valve is based on cinder valve mushroom head type, cone valves and other structures, the existence of "bulky, leak rate, valve head wear and card material, effort easily burned in industrial a simple structure can not enter the production process automatic control "and other defects and the development of novel design of the replacement of the product.