The solution to the rotation of the water meter
▌Install the check valve
The rotation of the water meter is mainly caused by the pressure fluctuation and the compression of the air bag. Consider installing a check valve, which can prevent the backflow of water.
In this way, when the pressure rises, the air bag is compressed, and the water meter rotates positively; when the pressure decreases, the check valve automatically closes, and the water meter does not rotate; when the pressure rises again, as long as the pressure is not higher than the pressure in the check valve , the water meter will not turn again.
The rotation of the water meter is mainly due to the reciprocating measurement of the water meter to accumulate a large amount of water. The installation of a check valve can reduce the frequency of the rotation of the water meter, which can also solve the problem of the rotation of the water meter caused by pressure fluctuations.
▌Construction in strict accordance with drawings
From the statistical analysis and processing results of the on-site investigation, the main causes of the water meter rotation phenomenon are the leakage of indoor pipes and water appliances.
It is mainly caused by the unreasonable installation of indoor pipelines, which leads to the generation of airbags in the indoor pipelines. Therefore, in the future work, standard construction and construction should be done according to the drawings, not "innovative" construction, and the necessary exhaust facilities should not be set up.
In addition, the design depth of the pipeline should meet the needs of use, and the exhaust valve should be reasonably arranged according to the characteristics of the pipeline during the design to remove the gas in the pipeline in time;
When the newly installed pipeline or the newly installed household meter is connected to the water for the first time, the valve should be opened slowly, and the air in the pipeline should be evacuated as much as possible to reduce the air content in the water.
▌The installation of water meters and pipelines should be based on the actual situation
When installing new water meters and indoor pipelines, the pipelines should be laid up along a certain slope to reduce the bending points and inflection points of the pipelines. Chance.
In the water meter renovation project, it is necessary to avoid the change of the water inlet direction in the user's home to cause the occurrence of blind pipes indoors. If the blind pipe is located at a high position or is located in the protruding pipe section of the pipeline, it is easy to generate air pockets, and the blind pipe should be removed during construction.
After the water meter is out of the house, no one lives, and there is a lot of gas in the pipeline.
It is recommended to investigate the user's situation when the water meter is out of the house. After the installation and acceptance of the water meter is qualified, close the back-meter valve of the user's water meter without occupants, and sign a contract with the user when the water meter is out of the house, explaining the reason.
▌Install the exhaust valve
It can be seen from the statistical analysis that the main reason for the rotation of the water meter is still caused by gas, so the installation of an exhaust valve can be considered.
However, due to the high price of the exhaust valve and the higher requirements for installation location and pipeline layout, it is also necessary to consider the loss of other facilities and equipment caused by the water discharged from the exhaust valve.
Such as: elevators, meter wells, indoor decoration, etc., will also add a certain workload to the maintenance and management of the pipeline network, so unless necessary, install as few exhaust valves as possible.
During the implementation of pipeline engineering,
If the burial depth allows, use the water connection point at the commanding height of the pipeline, reduce the exhaust valve, discharge the fire hydrant or the user can achieve the effect of pipeline exhaust when using water.
In conclusion
The reasons for the rotation of the water meter can be generally classified into two categories:
One is caused by the structure of the water meter itself. At present, most of the mechanical water meters are one-way measuring instruments, resulting in different positive and negative measurement values, resulting in the water meter rotation.
Second, the non-standard installation of water meters is the inducement for the rotation of water meters.
Therefore, construction standards and construction specifications should be strictly implemented in pipeline construction to eliminate the incentives for water meter rotation caused by unreasonable pipeline installation.