Chinese Suppliers Natural Gas Flowmeter Gas Vortex Precession Flow Meter

The middle part of the film is sandwiched by a metal sheet, which is a hard and inflexible "hard core", but the surrounding film is very soft, allowing the hard core to move left and right in the box. The membrane divides the space inside the box into two parts, each forming two "air chambers", namely, I, II, III, and IV. Each air chamber has an air vent through which air can be intake or exhaust. When the inlet of the left ventricle is filled with air and the outlet of the right ventricle is vented, the pressure of the gas acts on the membrane, causing the hard core to move to the right. On the other hand, if the right side enters and the left side exits, the hard core moves to the left. It can be seen that if you think of a box as a cylinder, and the membrane and hard core as pistons, isn't it the same as a steam engine?

The gas meter has the same principle as the ancient locomotive, relying on the pressure of gas to do external work and pushing the roller counter to count. How to do it specifically? The cylinder and piston mechanism in the locomotive have been greatly simplified by replacing the cylinder with a "bellows" and the piston with a "membrane". The so-called "bellows" is nothing more than an empty box made of metal, with two halves joined together and a soft and airtight film sandwiched between them.