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『How much does a river flow meter cost』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
1. Installation and construction of river level gauges and flow meters
The installation and construction of river level gauges and flow meters require standardized operations from four dimensions: pre installation preparation, core equipment installation, supporting system deployment, and commissioning and acceptance. The specific process and technical requirements are as follows:
1. Pre installation preparation: Site selection and scientific site selection. Radar flow meter: It is necessary to monitor the flow velocity of the river section continuously for 3 days through a portable flow meter, screen areas with stable flow velocity and not less than 0.1m/s, and prioritize the installation of existing structures such as bridges and gates to reduce ecological disturbance. Doppler ultrasonic flowmeter: It is necessary to work with the river management department to continuously monitor water level changes for 72 hours and confirm that the lowest water level is not less than 3cm. Through drone aerial photography and manual inspection, silt accumulation or garbage floating belts within 50 meters upstream and downstream should be checked to avoid probe obstruction. Preliminary survey section surveying: Use a section surveying instrument to measure the dimensions of the river section, record data such as water depth and riverbed slope, and provide a basis for support design. Soil bearing capacity testing: Soft soil foundation needs to be replaced with crushed stones or poured with concrete cushion layer to ensure the stability of the pole foundation. Communication signal testing: Use a signal tester to detect signals in frequency bands such as GPRS/4G and Beidou, mark weak areas, and develop antenna installati
2. Installation of core equipment: Classification based implementation of technical requirements for installation of radar water level gauges and radar flow meters. Foundation construction: Excavation of pole foundation pits (depth ≥ 1.2m, diameter ≥ 0.8m), pouring of C30 concrete and pre buried cages, curing time ≥ 7 days, covering with plastic film to prevent rainwater erosion during the curing period;
; After maintenance, calibrate the verticality of the ground cage with a level, with a deviation of ≤ 0.5%. Equipment fixation: The upright pole is made of hot-dip galvanized steel pipe with a diameter of 114mm, which is fixed to the ground cage with bolts. The top is welded with a 1.5-2m horizontal bar (the length is adjusted according to the equipment spacing) and sprayed with anti-corrosion treatment; The radar water level gauge adjusts the angle through a laser level to ensure that the emitted beam is perpendicular to the water surface (deviation ≤ 1 °); Adjust the beam coverage range of the radar flowmeter based on cross-sectional data, and lock the fixture after debugging. Installation of control box: fixed at a height of 1.5m on the pole, with telemetry terminal, power module, and communication module installed inside, and a heat dissipation space