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1. Working principle of gas turbine flowmeter
The working principle of gas turbine flowmeter is based on the rotation of the turbine in the fluid, converting the flow velocity into the rotational speed of the turbine. When turbine blades pass through permanent magnets, induction signals are generated. These signals are amplified and shaped by a branch amplifier, and then transmitted to a counter or frequency meter to display the cumulative flow rate. Meanwhile, these pulse signals can also be converted into voltage signals for indicating instantaneous flow rate. The rotational speed of the turbine is proportional to the fluid flow rate, and the number of rotations of the turbine is proportional to the total amount of fluid flowing through it. The output of the turbine flowmeter is a frequency modulated signal, which not only improves the anti-interference performance of the detection circuit, but also simplifies the flow detection system. The range ratio of this flowmeter can reach 10:1, and the accuracy is controlled within ± 0.2%. Due to its small inertia and compact size, the time constant of the turbine flowmeter can reach 0.01 seconds, making it particularly suitable for application scenarios that require rapid response. Turbine flowmeter can measure instantaneous flow and cumulative flow, and the output frequency signal is easy to digitize. The gas turbine flowmeter has a wide range of applications, not only suitable for measuring conventional fluids such as petroleum, organic liquids, inorganic liquids, liquefied gases, but also for detecting special fluids such as natural gas and low-temperature fluids. Turbine flow meters can meet both high-precision measurement requirements and fast response needs. <
2. Tianxin TBQZ-300 Intelligent Gas Turbine Flow Meter User Manual: [2]
The core content of the Tianxin TBQZ-300 Intelligent Gas Turbine Flow Meter User Manual is as follows:
1. Product Overview Tianxin TBQZ-300 Intelligent Gas Turbine Flow Meter is a high-precision and high reliability flow measurement instrument, suitable for measuring clean gases such as natural gas, city gas, propane, etc. The core component is the turbine sensor, which drives the turbine to rotate through gas flow. The speed is proportional to the flow rate and is processed by an intelligent module to output a standard signal. The product has explosion-proof design (ExdIICT6) and is suitable for industrial hazardous areas.
2. Installation requirements Environmental conditions: The installation location should be far away from vibration sources and strong electromagnetic interference, with an ambient temperature of -20 ℃~+60 ℃ and a relative humidity of ≤ 95%.
. Pipeline requirements: A straight pipe section should be installed before and after the flow stove monitoring gauge. The length of the front straight pipe section should be ≥ 10DN, and the length of the rear straight pipe section should be ≥ 5DN (DN is the nominal diameter of the pipeline). The inner wall of the pipeline should be smooth and free of defects such as welds and burrs. When installed vertically, the gas flow direction should be from bottom to top; When installing horizontally, it is necessary to ensure that the axis of the flowmeter is consistent with the axis of the pipeline. Electrical connection: Power supply voltage: DC24V ± 15% or AC220V ± 10%. Signal output: 4-20mA, pulse, RS485, etc., need to be configured according to requirements.III
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