How To Prevent Water Meter Autorotation

How to prevent water meter autorotation

With the development of urban housing construction, the urban water supply meter has gradually changed from the original main meter and unit meter water supply method to the centralized management method of one household and one meter water distributor. However, during the transformation process, there is a phenomenon of the water meter still rotating and measuring when the water point is not in use. Below are the main reasons and solutions for this phenomenon:

1. Small amount of self rotation of municipal water supply meters

For the direct supply part of the water meter that rotates due to frequent opening of the secondary water supply facility due to large flow of water, the problem of water meter rotation can also be solved by installing a check valve in front of the water meter to prevent the pressure fluctuation of the pipe network from transmitting to the back of the water meter. However, due to the head loss caused by the check valve, a check valve should be installed on the premise of ensuring that it does not affect the normal use of water by users.

2. Insufficient spacing between water meter pipes leads to meter rotation

At present, most household meters are installed in the same water meter well with multiple water meters. There are situations where the branch pipe is too thin, the distance between the water meters is too small, and the front and rear straight pipe sections are not long enough. In the case of one household using water, due to insufficient water flow in the branch pipe, negative pressure is formed near the branch pipe of the water user, and the balance of water pressure distribution between the water meters is broken. The water stored in the other users' water meters flows back to the branch pipe, forming a water meter inversion, When the water supply is stopped, the pressure in front of the other users' water meters rises, and the liquid forms a forward rotation after compressing the meter, ultimately forming a water meter rotation. For the existing water meter rotation, it can be solved by installing a check valve in front of the water meter. For newly installed users, prevention can be achieved by increasing the diameter of the branch pipe and leaving sufficient distance between the left and right sides of the water meter.

3. Water meter rotation caused by air in the pipeline

1. The pressurized part of the water meter rotates automatically

For the large area water meter rotation that exists in the pressurized part of the user, it is mainly due to the presence of gas in the pressurized part of the pipeline, which is caused by pressure fluctuations and compressed gas during the operation of the pressurized pump. The problem can be solved by installing an exhaust valve at the end of the partition layer to discharge the gas in the pipeline through the exhaust valve.

2. Water meter rotation caused by gas in the pipeline at the user's home

After investigation, it was found that the majority of individual users' water meter rotation in the community was caused by prolonged use of water and the inability to exhaust gas from the pipeline.