Design of Vortex Flow Meter | In Depth Exploration of Vortex Flow Meter Structure Analysis

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1. Wiring instructions for vortex flowmeter

The sensor of vortex flowmeter Minqing is designed with a three wire system, including power line, signal line, and power ground line. This design uses a three core shielded cable, where the shielded wire is connected to the ground of the housing at the sensor end. It is worth noting that Bi should not regret connecting the shielded wire to the ground at the secondary instrument end. The specific function of each wire is: the power line provides power, the signal line transmits data, and the power ground wire is connected to the ground terminal of the sensor. These three wires correspond to different functions, ensuring the normal operation of the equipment. The transmitter adopts a two-wire design and uses a two core cable. In the vortex street transmitter, the "+" terminal is connected to the+24V power supply, while the "-" terminal is connected to the signal input "+" Binance lifting terminal of the test instrument. The signal "-" end needs to be connected to the "-" end of a 24V DC power supply to form a 4-20mA current loop. This design enables vortex flowmeters and transmitters to work efficiently and accurately, especially in environments with limited power supply. By reasonable wiring and connections, interference can be minimized to the greatest extent possible and measurement accuracy can be improved. Proper wiring is crucial in practical applications. Incorrect wiring can not only cause equipment to malfunction, but also pose a safety hazard. Therefore, when installing and configuring a vortex flowmeter, it is essential to strictly follow the wiring diagram. By proper wiring, the signal transmission between the vortex flowmeter and the transmitter can be en

2. What is the principle of vortex flowmeter? The working principle of a vortex flowmeter is to set up a vortex generator in the fluid, so that regular vortices are alternately generated on both sides of the generator. The vortex columns are asymmetrically arranged downstream of the vortex generator, generating a certain frequency. The formula f=St * v/(1-1.27d/D) * d is used, where St is the Strouhal number, a dimensionless number, and is related to the vortex generator and Reynolds number; V is the flow velocity; D is the frontal width of the object; D is the nominal diameter) to obtain the flow velocity. Generally speaking, the output signal (frequency) of a vortex flowmeter is not affected by changes in fluid properties and composition, which means that the instrument coefficient is only related to the shape and size of the vortex generator and the Reynolds number. Its advantages are: simple and sturdy structure, easy installation and maintenance; Suitable for multiple types of fluids, including liquid, gas, steam, and some mixed phases; High accuracy, generally around ± 1% R; Wide flow range, up to 10:1 or 20:1 or greater; Small head loss; No zero drift; The price is relatively cheap; The disadvantage is that it is not suitable for situations with low Reynolds number Re<20000, and has limitations on the use of high viscosity, low flow rate, and small caliber; The requirements for the environment are high, and places with vibration should be avoided as much as possible, and there should be a long straight pipe section on the upstream side; The instrument coefficient is low, and the larger the caliber, the lowe

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