How to install and use a compound water meter can play a better role

The working principle of the double water meter is composed of a large diameter water meter and a small diameter water meter additional flow conversion device. According to the flow rate flowing through the water meter, the flow conversion device automatically controls the flow of water through the small-diameter water meter or simultaneously through the large-diameter water meter. The reading of the compound water meter is given by two separate counters. The biggest advantage is that the water meter has a small starting flow and a wide measuring range (including the minimum flow from a small-diameter water meter to the maximum flow of a large-diameter water meter), especially for the extremely low flow rate in large-diameter tubes. Its connection length can meet the installation requirements of large-diameter horizontal screw-wing water meters, and can meet the installation requirements of large-caliber rotary-type water meters, that is, install a corresponding straight pipe joint at the inlet end of the double-type water meter, especially It will bring great convenience and quickness to the large-diameter horizontal screw-wing water meter or large-diameter rotary-wing water meter replacement and water meter verification used online.

Duplex water meters are an example of large diameter water meters. The traditional mechanical large-caliber water meter (including the large-diameter magnetic card water meter) has a large cavity, and the water flow impacts the impeller to rotate. Ordinary mechanical large-caliber water meters are not metered when weak water flows through the movement or below the dynamic flow. This is a drawback of large-caliber mechanical water meters, and the double-type water meter solves the problem of not measuring at low flow rates. He is composed of two water meters, one large-diameter water meter is the main table, and the other is a small-diameter water meter called the sub-table. The work of these two tables is controlled by the flow conversion control valve. When the water flow is small, the small-diameter water meter is started to measure the water volume. When the water flow is large, the large-diameter water meter is started for work metering, and the sum of the readings of the last two tables is the sum of the water amounts. It can also be concluded that the scope of use of the double-type water meter should be in areas where the water flow is unstable and the flow rates vary greatly. For example, rural areas such as irrigation, mines, and mountainous areas are relatively volatile. In this way, the double-type water meter can work normally when the water flow with a large flow rate and a small flow rate is different.

How to install and use the double water meter:

1. Select the diameter of the water meter, based on the pipe mouth and flow rate equal to or less than the flow rate commonly used by the water meter;

2. The double-type water meter should be installed horizontally with the surface facing up. The direction of the arrow on the case is the same as the direction of the water flow. The installation position should avoid exposure, freezing, pollution and flooding, so as to read and unload the meter. The newly installed pipeline must be flushed with stones, silt, hemp and other debris in the pipe, and then installed in the water meter to avoid water meter failure;

3. For easy disassembly and maintenance, valves should be installed on the upstream and downstream of the water meter, and the inlet and outlet of the water meter should have straight pipe sections of the same diameter. The length of the straight pipe is not less than three times the diameter of the pipe;

4. It is recommended to install a filter upstream of the water meter to prevent debris from entering the pipeline from damaging the water meter.

5. Install the necessary straight pipe section or its equivalent rectifier on the upstream and downstream of the water meter. The length of the upstream straight pipe section is not less than 10D, and the downstream straight pipe section is not small and 5D (D is the nominal diameter of the water meter). For eddy currents caused by elbows or centrifugal pumps, a rectifier must be installed in front of the straight pipe section.

6. When installing the water meter, it should be noted that the water outlet of the downstream pipeline of the water meter is higher than the water meter by more than 0.5M, and the water meter is inaccurate due to insufficient water flow in the pipeline.

7. The water meter has excellent anti-blocking performance, but it is sensitive to siltation and weeds in the tube, and should be avoided during use. If there is silt and weed in the pipeline, it should be cleaned immediately, otherwise it will affect the normal metering of the water meter.

The above is all about today's sharing of the use of dual-use water meters to play a better role, I hope that everyone can use this device in the future.