Working principle and structure of pneumatic diaphragm pump
The working principle of the pneumatic diaphragm pump is based on compressed air to drive the diaphragm to move back and forth in the pump body, thereby achieving the suction and discharge of liquids. The specific process is as follows: when compressed air enters the pneumatic part of the pneumatic diaphragm pump, it first pushes one diaphragm to move in another direction, causing negative pressure in one chamber of the pump, thereby opening the suction valve and sucking the liquid into the pump. Subsequently, compressed air drives another diaphragm to move in the opposite direction through the pneumatic valve inside the pneumatic section. At this point, the diaphragm in the chamber that originally generated negative pressure moves, causing the liquid to be discharged from the pump through the discharge valve under pressure. With the continuous switching of pneumatic valves in the pneumatic section, the two diaphragms alternate back and forth to achieve continuous and uninterrupted liquid transportation. one
The structure of the pneumatic diaphragm pump consists of two main parts: the airflow structure π and the liquid flow structure π, which are completely isolated by the two side diaphragms. The air source pressure only needs to be greater than two kilograms per square centimeter to work. At a working pressure of 5 to 8 kilograms, the high-pressure gas in the valve chamber drives the connecting rod shaft to move back and forth through the airflow guidance system. At the same time, the consumed low-pressure gas is quickly discharged through the exhaust port. Under the alternating action of high and low pressure gases on both sides, the connecting rod shaft drives the diaphragm on both sides to move left and right, causing alternating changes in air pressure in the volume chambers on both sides, thereby achieving continuous suction and discharge of liquid.
