Diaphragm pumps, as a common positive pressure conveying equipment, are widely used in fields such as chemical, pharmaceutical, and food. It plays an important role in industrial production with its unique working principle and superior performance. The following will provide a detailed introduction to the working principle of diaphragm pumps, and analyze their advantages, disadvantages, and applicability in practical applications.



1、 Working principle of diaphragm pump



1. Compressed air drive: The diaphragm pump drives the pump's operation through the action of compressed air. It uses a pneumatic two-way valve to control the inlet and outlet of compressed air, achieving the reciprocating motion of the pump and the vibration of the diaphragm.



2. Diaphragm structure: The core component of a diaphragm pump is the diaphragm, which is made of elastic material. When compressed air enters the pump chamber, the pressure causes the diaphragm to move in one direction, compressing the liquid and expelling it; When the compressed air supply stops, the diaphragm will quickly rebound, generating negative pressure and sucking in new liquid.



3. Valve control: The diaphragm pump controls the inflow and outflow of liquid through a pneumatic two-way valve. When compressed air passes through the control valve, it enters one side of the pump head, causing the diaphragm to move towards the other side and discharge the liquid; At the same time, the valve controls the liquid to enter the pump head, achieving suction.