Depends on the type of water meter and piping installation.
Type of water meter: traditional mechanical meter that rotates.
1. Water meters used in daily life are divided into two categories. The first category is ordinary mechanical water meters, anti-drip water meters, etc. ; the second category is smart IC card water meters, remote; transmission water meters, etc. Since the anti-reversal performance of smart water meters is very good, the phenomenon of water meter reversal mainly occurs in ordinary water meters.
2. Let's first talk about the human factors in water meter reversal. The artificial inversion method is very simple. Simply disassemble the water meter and install it upside down. Installing the water meter backwards will cause the meter reading to go backwardsof water, causing a huge error in the water meter measurement. This is currently the most direct way to avoid water bills.
Ordinary mechanical water meters can therefore be reversed.
Let there be a check valve in the pipeline, otherwise, the traditional mechanical watch will rotate. If so, not even a mechanical watch. The principle is as follows:
Solving the water meter reversal problem is very simple, you just need to install a non-return valve.
So how does the check valve work? Let me give you an animation to help you understand easily, as shown below:
Through this check valve system, when the water flow is normal, When it s 'flows in one direction, it can pass smoothly, but when it flows in the opposite direction, it will be blocked by the valve and the backflow problem is solved successfully~
A bucket is filled with water andautomatically empties before returning. What is the physical principle of filling water in situ and how to make a model?
Put a little salt (or other electrolyte solution) into the water, place two opposite electrodes at both ends of the container, add a magnetic field perpendicular to the water surface and turn on the power, so the water will rotate automatically!
But it will be inconvenient if it is a non-conductive container (the contactless water mentioned here should mean that there is no need to stir it with anything, otherwise the following situation will be difficult to achieve), put the two electrodes into the container. Connect the power supply to both ends of the water and add a magnetic field as above, and the water will rotate automatically!
This is the principle that a current-carrying conductor will experience an ampere force in a magnetic field. Adding consistent electrolyteyou simply cause an electric current to form in the water!
This is achieved using changes in the position of the center of gravity.
When no water is added, the center of gravity of the bucket is below the rotating shaft, and the mouth faces upward at this time.
When adding water, as the amount of water increases, the equivalent center of gravity of the water and the bucket gradually moves upward. When water is added to a certain extent, the center of gravity will be above. the rotating shaft. When water is added, as long as there is a slight disturbance, the bucket will move upward. Just twist and pour the water. After the water is poured, the bucket returns to its original position under the action of. couple, and so on.
It is easier to make a model. Find a plastic bucket of varying thicknesses, preferably with a wide opening.p greater than the bottom radius. Then thread a chopstick into the place where the cup is made, and that's it. The main thing is to wear it in the correct position.
Or find a bottle of spring water, remove the top part, fill the bottom of the quilt with plastic foam, then run a wooden stick through the middle, or can.