Development and Application of Water Meter Calibration Device by Weighing Method and Analysis of the Influence of Measurement

The weighing method water meter verification device is a flow meter that uses the flow velocity of the water flow on the impeller to calculate the flow volume of the water flowing through the water pipe. This can accurately measure the different outflow volumes of water flow from 0.1ml to 0.0001ml, and accurately measure the cost of water flow. The water flow rate measured by the water meter is the cumulative flow rate flowing through the water meter piping. Water meters are divided into two types according to the design method: volumetric type and speed type. From the design principle, the volumetric water meter has higher precision than the speed water meter, but the volumetric water meter has high requirements on water quality, and impurities in the water are easy to block. The meter that records the water volume is installed on the water pipe. When the user releases the water, it can indicate the water volume passed by the pointer and dial of the clock. Then, let’s understand the development and application of the weighing water meter verification device and the impact analysis of measurement. Bar!

1. The main factors affecting the calibration of water meters by weighing method

1.1 Selection of Caliber for Water Meter Verification by Weighing Method

In the design and construction of tap water, water supply enterprises routinely use the weighing method for water meter verification to determine the caliber of the water meter.According to the requirements of the national design code, the water meter caliber needs to determine the rated flow rate of the water meter according to the second flow rate of the water supply design. When the water consumption is uneven, the maximum flow rate of the water meter should be determined by the second flow rate of the water supply design.By analyzing the user's usage, the water meter inlet adopts the meter of each household. The household water household generally determines the water inlet pressure according to the water consumption and the maximum caliber of the makeup remover to satisfy the user.For example; if all the inflow ports of the squatting toilet adopt DN25 pipe caliber, then the inflow port needs to use DN25 pipe caliber, and the hot water inflow port adopts DN20 caliber.The water consumption of a general residential household can be calculated according to 6~30m3/m, and the design flow rate is 0.56~1.25m3/h. When the flow rate is lower than the DN15 water meter to a large flow rate, a DN15 rotor-type cold water meter can be selected to fully meet the water consumption of a household. When the demand and measurement accuracy require water meter measurement, it is recommended to make the diameter of the water meter consistent with that of the piping.

1.2 Selection of types of weighing water meter verification equipment

At present, there are many types of gravimetric water meter verification devices on the market, so it is very difficult to select the accuracy of the water meter. According to the type of water meter and the medium of use, the rotor type, vertical type, and spiral type are mechanical rotary water meters. Sometimes the numbers will change. An exception is generated.The needles are made of hard plastic and are subject to wear.Since mechanical water meters are measured by rotation, the degree of wear will affect the measurement.Due to the greater wear and tear of inferior water meters, the error will become larger faster.When the wear gap of the water meter increases to a certain extent, the gauge of the water meter changes frequently and does not count, which directly affects the measurement accuracy.In order to avoid this phenomenon, you can try to choose a good water meter and a brand water meter produced by a regular manufacturer.

1.3 The impact of impurities in tap water on the calibration accuracy of weighing water meters

When installing water pipes for construction or maintenance, you only need to reconnect the water pipes. Due to careless construction, a small amount of impurities may enter the mouth of the water pipes.Common impurities are small sand, welding chips, metal rust and other impurities. A small amount of these impurities will not have a great impact on the water meter, but long-term accumulation may cause the volume in the water meter to become larger and larger, and these impurities are mixed into the water flow.Since the hot water pipe network is easily polluted by rust, in most cases, the water tank is insulated to store the hot water source, and the water in the water tank may be involved in rust.In addition, the hot water meter polluted by the rust of the pipe network itself is easy to be stained by rust. After a period of time, the water meter index will become unclear, so the water quality will have a greater impact on the water meter.2. Strengthen water meter management

The calibration and installation of water meters by weighing method is one of the important management contents of the water supply department. Only by strengthening the management of water meters can better economic and social benefits be obtained.First of all, the measurement of water supply enterprises is based on the accuracy of water meters. When the measurement deviation brings unnecessary economic losses to users, only by using scientific management methods to achieve accurate measurement can it meet the interests of both parties. For phenomena such as improper decomposition, malicious damage, and abnormal measurement of normal wear and tear, managers need to discover and stop them.Only by increasing management efforts, timely discovery and timely treatment can the economic losses and social impact caused by adverse factors be effectively suppressed.

Since the calibration and installation accuracy of weighing method water meters directly affects the vital interests of thousands of households, and also affects the service quality and economic benefits of enterprises and corporate users, it embodies its scientific nature, accuracy, Reliability is of great significance to improving service quality and service awareness.

The above introduction is the development and application of weighing method water meter verification device and the impact analysis of measurement. If you want to know more, please feel free to contact us!