The working principle and structural features of the heavy hammer ash unloading valve: The heavy hammer valve features a steel plate welded structure, a counterweight lever automatic reset mechanism, with a compact and stable operation. This series of heavy hammer valves, after the material falls, utilizes the counterweight lever system to automatically reset the valve plate, thus completing the material conveying. The heavy hammer ash unloading valve is divided into flat heavy hammer ash unloading valve and socketed heavy hammer ash unloading valve. The flat heavy hammer ash unloading valve operates by using the different timing of the upper and lower valves to keep a layer of valve plate in a closed and isolated state in the middle of the equipment, preventing air bypass. Under positive pressure conveying, the double-lock gas valve can also act as an auxiliary flow for the balance and pressure increase valve, enabling the equipment to continuously feed while also locking the gas, meeting the requirements for conveying powdered and granular materials by pneumatic means.