Diaphragm gas meter working principle

The diaphragm box of a gas meter usually consists of two identical gas measuring chambers. Each measuring chamber is divided into two small measuring chambers by a soft diaphragm. When gas enters these small metering chambers in turn, the diaphragm will be affected by the pressure difference and swing freely. The movement of the diaphragm assembly drives the linkage mechanism through the rocker, thereby controlling the rotation of the valve cover, so that each metering chamber is inflated and exhausted in sequence, achieving continuous cyclic movement of the gas meter.

In addition, the eccentric rotating gear of the linkage mechanism drives a mechanical one-way counter to count through gear transmission, and finally the exhaust volume of the gas meter is displayed through the counter. Every time the diaphragm reciprocates, a certain amount of gas will be discharged. When the roller rotates through a counting unit, the metering display effect of roller rotation is achieved.

The diaphragm gas meter converts linear reciprocating motion into circular motion through the internal mechanical structure, and then drives the mechanical roller counter to rotate through the circular motion. The rotation speed and the curvature of the diaphragm are proportional to the flow rate, and the sector gear rotates accordingly. The gear on it reacts with the magnet of the upper sensor to generate an electrical signal, thereby obtaining the gas flow rate.