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1. Introduction to the Babbitt measurement tank
The Babbitt measurement tank (also known as the Babbitt measurement tank) is an auxiliary equipment used for measuring the flow rate of sweet potatoes in pure channels. In the process of liquid flow, the waterway that flows in a non full pipe state is called an open channel. The application fields of open channel flow meters include urban water supply channels, cooling water intake and drainage channels for thermal power plants, sewage treatment inflow and discharge channels, industrial and mining enterprise wastewater discharge, as well as water conservancy engineering and agricultural irrigation channels.
2. How to detect the flow velocity of water
Water flow velocity detection method:
1. Flow meter method: The flow meter method uses a flow meter to measure the water flow velocity and calculates the flow rate by multiplying the flow velocity by the cross-sectional area.
. The measurement results of the flowmeter method can serve as a standard for calibrating or verifying other flow measurement methods. Applicable conditions: When the water depth is greater than 10cm and the flow velocity is not less than 0.05m/s, a flow meter can be used to measure the flow velocity.2、 Float method: Float flow measurement method is a simple flow measurement method that measures the cross-section of a waterway based on the observed float drift velocity, in order to estimate the cross-sectional flow rate. Applicable conditions: The channel length is not less than 10 meters, there is no bending, and the bottom wall is smooth.
3、 Thin walled weir method: The thin-walled weir method has high measurement accuracy. The commonly used methods inclu
4、 Babbitt trough method: Babbitt trough, also known as Bacher trough, has the characteristics of low head loss, unsuitable sedimentation of debris, and high water measurement accuracy. The disadvantages are high cost and high requirements for construction quality. Applicable conditions: The dimensions of each part of the groove meet the requirements of the standard groove, and the given standard dimensions cannot be changed arbitrarily during design and installation; There should be a drop of no less than 0.2m downstream of the import.
5、 Volumetric method: Within a certain period of time, the sewage in the channel is introduced into a container with a calibrated volume. The flow rate Q is obtained by dividing the net volume difference △ V at the end of time and the starting time by the time difference △ t. The measurement is repeated several times and the average value is taken. Applicable conditions: Small flow rate and non-standard drainage channels.
7、 Flow meter method: Directly select targeted professional flow meters for measurement. According to the structural principle of flow meters, they can be divided into the following types: volumetric flow meters, impeller flow meters, roll up differential pressure f