People’s Daily cooking fuel from severe waste of resources, such as wood, coal, and severe pollution of conventional into use and the gas, and even electricity, etc.
This is where the natural gas meter comes into play, so let’s talk about what a natural gas meter is.
The natural gas meter is the gas meter. Outside the gas meter, you can only see a roller with a number in the small glass window. There are also seven numbers on the roller, the first four decimal places are black, and the last three are red.
People’s Daily cooking fuel has been changed from wood, coal and other serious waste of resources, serious pollution of conventional energy to use natural gas, gas, even electricity and other clean energy.
Here the gas meter will play its role. With its automatic accumulation function, those who use natural gas or pipeline gas can easily know how much gas they have used, so that they can pay according to the cubic meters of gas consumed each month.
Gas metering meters include G1.6, G2.5, G4 household meter series and G6, G10, G16, G25, G40, G65, G100 industrial meter series, as well as intelligent IC card gas meter, code prepaid gas meter, direct reading intelligent remote transmission meter series.
Roller counter has many advantages, but it has a big drawback, is to carry the time to drive the high wheel, to overcome a lot of friction resistance.
Gas meters can overcome this shortcoming because of their relatively large driving force.
Working principle: The gas meter has the same principle as the old locomotive. It relies on the pressure of the gas to do work and push the roller counter to count.
So how do we do that?
The cylinder, piston mechanism in the locomotive is greatly simplified, with “bellows” instead of cylinder, with “film” instead of piston.
A bellows is nothing more than an empty metal box made of two halves, sandwiched between them by a soft, air-tight film.
The film is held in the middle by a metal sheet. It is a hard core that cannot be bent, but the surrounding film is soft enough to allow the core to move from side to side inside the box.
The film divides the space inside the box into two parts, each forming two “air chambers”, namely ¢¡, ¢¢, ¢£ and ¢¤ in the figure.
Each chamber has a vent through which air can be taken in or discharged.
When AIR ENTERS THE LEFT VENTRICULAR orifice AND exhauSTS THE RIGHT VENTRICULAR ORIFice, THE gas pressure acts on the membrane, causing the hard core to move to the right.
On the contrary, if the right side of the air intake, the left side of the air, the core will move to the left.
So, if the box is regarded as a cylinder, and the film and hard core as pistons, is it not the same as a steam engine?
The same technology is used in the gas meter as in the steam engine, allowing the meter to continue moving as the film and core move to the far left or right.
To be specific, two sets of bellows and film are used, and their hard cores are connected by rods to the same upright shaft, on which there are two cranks, which are also 90 degrees apart, so that the action of the two hard cores is half a step apart.
When one moves to the end, the other is right in the middle and never stops.
The top half is the crankshaft and linkage seen at eye level, and the bottom half is viewed from above.
It can be seen here that the crankshaft OC and OC’ are exactly 90 degrees apart.
In connection with the previous diagram, links AB and BC are connected to the hard core on the left, and links A’B’ and B’C’ are connected to the hard core on the right.
From this figure, we can also clearly see that the rotation of the crankshaft drives the roller counter, which accumulates the gas consumed.