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What are the commonly used flow meters for sewage flow monitoring?
2. How to monitor the flow of urban drainage pipelines
The flow monitoring of urban drainage pipelines is mainly achieved by installing Doppler ultrasonic flow meters, which can synchronously measure water level, flow velocity, temperature, and flow rate, and support remote online monitoring.. The following is the specific monitoring plan and technical details:
1. Core monitoring equipment: Doppler ultrasonic flowmeter. The measurement principle is based on the Doppler effect, where the probe emits ultrasonic waves obliquely upwards. When it comes into contact with bubbles or particles in the fluid, it generates a frequency shift (Δ f), which is proportional to the flow velocity. The fluid flow velocity is calculated by measuring the frequency shift. Technical parameters for flow velocity measurement: range 0.02~5m/s, accuracy ± 1.0% ± 1cm/s, resolution 1mm/s. Water level measurement: range 0~10m, accuracy ± 1cm, resolution 1mm. Temperature measurement: range -10 ℃~60 ℃, accuracy ± 0.5 ℃, resolution 0.1 ℃. Flow measurement: range 0.001m3/h~9999m3/h (adjusted according to the section), accuracy ± 3% (affected by flow state). Equipment advantages: Dual channel depth measurement technology: solves the problem of poor stability of conventional static pressure water level gauges at high flow rates, ensuring high-precision measurement of water levels. Multi functional: Integrated water level, flow rate, and flow monitoring without the need for external secondary instruments. Adapt to underground environment: Adopt contact measurement to stably output data.
2. System composition and remote monitoring hardware configuration F
III. Installation and Use Points: The installation method is to fix the probe on the L-shaped bracket, place the bracket inside the pipeline, and ensure that the probe is facing the direction of water flow.
. In harsh environments, it is necessary to adjust the bracket shape (such as bending design) to avoid interference with the flow field across the pipeline. A certain park has deployed Doppler ultrasonic flow meters and telemetry terminals to monitor the real-time discharge and water quality of enterprises. The 4G wireless transmission installation is convenient, and the data accuracy rate is over 98%. The equipment supports the calculation of non full pipe fl