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1. Monitoring method for flow rate and velocity in underground wells
Monitoring the flow rate and velocity in underground wells is the core link of urban drainage network management, and its data accuracy directly affects the decision-making effect of flood prevention and drainage, sewage treatment, and waterlogging warning. The following is an explanation from three aspects: monitoring technology, equipment application, and installation principles:
1. Application technology principle of pipeline radar water level monitoring station: using a radar water level gauge with a beam angle of only 8 °, the water level height is calculated by emitting high-frequency electromagnetic waves and receiving reflected signals. Its non-contact measurement method can avoid the influence of water pollution or mechanical wear, and is suitable for complex underground environments. Functional features: Monitoring range: Stable monitoring of water level in manholes within 7 meters, reducing multipath interference from wellbore walls and metal components. Multi parameter collection: integrates data such as water level, rainfall, temperature and humidity, supports GPRS, 3G, 4G communication, and achieves multi center synchronous transmission. Storage and Alarm: The local high-capacity storage module permanently stores historical data and supports remote configuration and upgrades; Automatic alarm for water level exceeding the limit. Low power design: The lithium battery power supply system is modularly installed near the wellhead to reduce maintenance difficulty. Installation requirements: The radar water level gauge is fixed directly below the inspection well with a stainless steel L-shaped bracket and installed horizontally. Avoid interference areas such as drainage outlets and pipe bends to ensure measurement accuracy.
2. Application technology principle of ultrasonic flow monitoring station: Based on the Doppler effect, sound waves are emitted into the fluid through an ultrasonic probe, reflected waves are received, and frequency changes are analyzed to calculate flow velocity and flow rate.
. The device adopts an intermittent operation strategy, collecting data every 5 minutes by default, and automatically increasing the upload frequency in case of abnormalities. Functional features: Accurate monitoring: synchronized measurement of flow velocity, water level, and flow rate inside the pipeline, supporting the collection of multiple parameters such as flow rate and temperature. Data continuity: When communication is interrupted, data is temporarily stored in the local cache and automatically replenished after recovery. Low power management: Non working devices sleep to extend the lifespan of the power supply system. Installation requirements: The Doppler ultrasonic flowmeter is fixed to the lower end of the pipeline through a spliceable stainless steel bracket, ensuring that the probe is completely immersed in the fluid. The power supply system is installed under the wellhead cover for easy maintenance. 3. Application technology principle of ultrasonic flow monitoring station with water level monitoring: Integrating Doppler ultrasonic flowmeter and radar water level gauge to form a "pipeline+manhole" dual monitoring system. Flow meters are responsible for monitoring the internal flow velocity, flow rate, and water level of pipelines, while radar water level gauges supplement the water level data of manholes, especially suitable fo
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