What Is a Gas Meter?

Outside the gas meter, you can only see a small wheel with numbers in the small glass window. The wheel also has seven digits. The fuel for people's daily cooking has changed from conventional energy sources such as firewood and coal that are wasted and polluted to natural gas and gas, and even clean energy such as electricity. Here, the gas meter will play its role. Its automatic accumulation function enables those who use natural gas or pipeline gas to easily know how much gas is used so that they can pay according to the cubic meters of gas consumed each month.

Gas Meter

Since 2005, the penetration rate of urban gas has increased year by year, and by 2009, it has reached 91.4%. According to the "National Twelfth Five-Year Plan" for national urban gas development, by the end of the "Twelfth Five-Year Plan", China s urban gas penetration rate has reached above 94%, and the county and small town gas penetration rates have reached above 65%. 200 million households.
According to forecasts, from 2012 to 2015, the market size of China's membrane gas meters will reach 2074, 2488, 2986 and 358.3 million units, with a compound growth rate of 20% ^.

The gas meter has the same principle as the ancient locomotive. It relies on the pressure of the gas to perform work and pushes the roller counter to count. How to do it? The cylinder and piston mechanism in the locomotive is greatly simplified, and the "air box" is used to replace the cylinder, and the "film" is used to replace the piston. The so-called "wind box" is just an empty box made of metal. The box is made up of two halves with a soft, air-impermeable film in the middle.

The middle part of the film is sandwiched by a metal sheet, which is a "hard core" that cannot be bent, but the surrounding film is very soft, allowing the hard core to move left and right in the box. The film divides the space inside the box into two, each forming two "air chambers", namely, I, II, III, and IV in the figure. Each air chamber has a vent through which air can be drawn in or out. When the mouth of the left chamber is fed with air and the mouth of the right chamber is vented, the pressure of the gas acts on the film, causing the hard core to move to the right. Conversely, if the air is drawn in on the right side and the air is drawn out on the left side, the hard core moves to the left. It can be seen that if the box is regarded as a cylinder and the film and hard core are regarded as a piston, is this not the same as a steam engine?

The same technology is used in the gas meter as the steam engine, so that when the film and hard core are moved to the left or right, the gas meter can continue to move. Specifically, two sets of bellows and film are used, and their hard cores are connected to the same upright shaft with a rod. There are two cranks on this shaft, and the two cranks are also 90 degrees apart, making the two hard cores move Half a step away. When one of them moves to the end, the other happens to be in the middle and never stops. The upper part is the crankshaft and connecting rod when you look at the head, and the lower part of the figure is from the top down. It can be seen here that the crankshafts OC and OC 'are exactly 90 degrees apart. In connection with the previous figure, in fact, the links AB and BC are connected to the left hard core, and the links A'B 'and B'C' are connected to the right hard core. From this figure, we can also clearly see that the rotation of the crankshaft drives the roller counter, so that the amount of air consumed is accumulated.

Gas charges are calculated in cubic meters. The volume of gas discharged by the membrane in the bellows is determined by the area of the membrane and the stroke (that is, the magnitude of the movement). By designing this volume, the unit of the roller counter reading is exactly cubic meters, so that the total gas consumption can be read directly by the roller counter.

1.Can't use gas

(1) The front valve is not open; open the front valve

(2) The gas appliance is faulty or the pipe network is out of gas; repair the gas appliance or wait for gas supply to resume

(3) The card is not displayed, and the IC card meter is faulty; notify the gas management department for maintenance

(4) Exhaust gas shut-off valve; hold IC card to purchase gas from gas department

(5) Close the valve due to electromagnetic interference; press the inquiry button or insert the user card to open the valve

(6) Use an illegal card to close the valve more than 3 times, press the query button or insert a user card to open the valve

2.The gas purchase amount cannot be entered

Insert the IC card into the card holder while observing the LCD screen.

(1) No response; the card is inserted in the wrong direction or the surface of the IC card is dirty or the IC card is not inserted in place, otherwise the IC card gas meter may be faulty, please notify the gas management department for repair

(2) Gas purchase amount has been entered into the table

(3) The sum of the amount of gas purchased in the card and the amount of remaining gas in the table is greater than 9999.99m3

3. LCD display error code

Insert the IC card into the card holder while observing the LCD screen.

1-1 indicates a circuit failure;

1-2 indicates that the control valve is faulty;

2-1 indicates that a metal conductive object is inserted;

2-2 means strong magnetic field interference;

3-1 have read the card;

3-2 cards other than this system;

3-3 The input gas volume exceeds 9999 square;

3-4 non-user card;