Problems with double-diaphragm metering pumps
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1. How many diaphragms are there in one diaphragm of a double-diaphragm metering pump? 2. Is there atmospheric pressure between the two diaphragms? If so, how is the hydraulic oil pressure transmitted to the cylinder? I don’t know much about the structure of metering pumps
Your profile picture doesn’t give the impression that you don’t understand
If the rupture detection is pressure-based, during suction, the pressure between the diaphragms is roughly equal to the pressure inside the pump head; during discharge, it is at atmospheric pressure. When the diaphragm ruptures, the discharge pressure applies during discharge. If it’s not a pressure-based detection method, such as one that measures conductivity, then it’s a different matter.
I don’t understand what you’re asking; searching on Baidu will provide detailed information on the structural principles. The motor drives the plunger rod to move back and forth through a worm gear, and this is the principle of a piston pump. Adding a diaphragm in the middle results in a diaphragm metering pump. The hydraulic oil pressure you mentioned is transmitted to the cylinder through a diaphragm. This is my personal understanding; perhaps you have studied it more in depth