Turbine Flowmeter Has Compact Mechanism And High Reliability

The intelligent liquid turbine flowmeter is a new type of intelligent instrument that integrates the turbine flow sensor and display integration developed by the advanced ultra-low power single-chip microcomputer technology. It has the advantages of compact structure, intuitive and clear readings, high reliability, and no external power interference. , anti-lightning strike, low cost and other obvious advantages.
Turbine flowmeter is a speed-type flow meter with temperature and pressure compensation function[9], which belongs to a kind of speed-type flowmeter. Its working principle is: the power of flowing fluid drives the turbine blade to rotate, and its rotation speed and volume The flow rate is approximately proportional, and the indication of fluid volume through the flowmeter is based on the number of revolutions of the turbine wheel. Turbine flowmeter is widely used in petroleum, chemical industry, electric power, gas pipeline network, City gas and other fields, and is widely used in trade settlement.
A flow meter that uses a turbine for measurement. It first converts the flow rate into the rotational speed of the turbine, and then converts the rotational speed into an electrical signal proportional to the flow rate. This kind of flowmeter is used to detect instantaneous flow and total cumulative flow, and its output signal is frequency, which is easy to digitize. The induction coil and the permanent magnet are fixed together on the housing. When the ferromagnetic turbine blades pass by the magnet, the reluctance of the magnetic circuit changes, thereby generating an induced signal. The signal is amplified and shaped by the amplifier, and sent to the counter or frequency meter to display the total accumulated flow. At the same time, the pulse frequency is converted to frequency-voltage to indicate the instantaneous flow rate. The speed of the impeller is proportional to the flow rate, and the number of revolutions of the impeller is proportional to the total amount of flow. The output of the turbine flowmeter is a frequency modulated signal, which not only improves the anti-interference of the detection circuit, but also simplifies the flow detection system. It has a turndown ratio of up to 10:1 and an accuracy within ±0.2%. The time constant of the turbine flowmeter with low inertia and small size can reach 0.01 seconds.