What is the name of the film flowmeter
The diaphragm affects the vertical reciprocating motion of the swing, the swing rod and a connecting rod to affect a common crank shaft, when the crank shaft torque difference received a certain period (90 degrees), can rotate continuously, and which are driven by the valve to change the direction of air inlet and outlet and drives the counting device to achieve the purpose of continuous automatic measurement.
There are many types of membrane gas meters because of their different structures, but their measuring principles are basically the same. They are designed and manufactured according to the above basic principles. It is a constant volume gas into the metering chamber, to fill after their discharge, through special institutions, the number of cycles charge and discharge into unit volume (usually m3), transfer to the external gas meter counting indicator panel, read directly by the gas volume. Since it is difficult to exhaust the gas from a metering chamber, two or more measuring chambers are generally arranged to alternately inflate and exhaust the two gases.
Diaphragm gas meter is a mechanical instrument, film movement is the driving force of gas meter gas on the inlet and outlet pressure difference. It is the source of power is measured by the gas chamber pressure on one side of the diaphragm into higher than normal pressure generated by the diaphragm to the other side of the mobile and impulse (i.e. the diaphragm affects the vertical pivot torque), when the diaphragm moves to limit the other side (also called dead) when the position of the moment no longer can make diaphragm return to the force, we must rely on the second diaphragm produced the same force to drive a diaphragm for the return movement; when changing the first diaphragm outlet inlet, the other side of the diaphragm and the air force continues to move back and forth, and the direction of movement can also change the second diaphragm.
