Application of Turbine Flow Meter in Paper Flow Measurement

Abstract: The application information of turbine flowmeter in papermaking flow measurement is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. 1. The working principle of the turbine transmitter The turbine flowmeter is composed of a turbine, a bearing, a preamplifier, and a display instrument. The measured fluid impacts the turbine blades, causing the turbine to rotate. The speed of the turbine changes with the flow rate, that is, the flow rate is large, the turbine The speed is also high. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the application article details of turbine flowmeters in papermaking flow measurement. 1. The working principle of the turbine transmitter The turbine flowmeter is composed of a turbine, a bearing, a preamplifier, and a display instrument. The measured fluid impacts the turbine blades, causing the turbine to rotate. The speed of the turbine changes with the flow rate, that is, the flow rate is large, the turbine The rotating speed of the turbine is also large, and then the magnetoelectric conversion device converts the rotating speed of the turbine into electrical pulses of the corresponding frequency, which are amplified by the preamplifier and sent to the display instrument for counting and display. Instantaneous flow and cumulative flow can be obtained. The working principle of the turbine transmitter is that when the fluid flows along the axis of the pipe and hits the turbine blades, there is a relationship between the flow rate qv, the flow rate V and the fluid density.ρThe product of proportional force acts on the blades, propelling the turbine to spin. While the turbine rotates, the blades periodically cut through the magnetic field lines generated by the electromagnets, changing the magnetic flux of the coils. According to the principle of electromagnetic induction, a pulsating potential signal will be induced in the coil, and the frequency of this pulsating signal is proportional to the flow rate of the fluid being measured. The pulse signal output by the turbine transmitter, after being amplified by the preamplifier, is sent to the display instrument, and the flow measurement can be realized. 2. Selection of turbine flowmeter (1) The flowmeter body should preferably be made of 316 stainless steel for anti-corrosion. If it is an explosion-proof area, it must be explosion-proof. (2) Bearings generally have three specifications of tungsten carbide, polytetrafluoroethylene, and carbon graphite: tungsten carbide has the highest precision, and it is used as a standard part for industrial control; polytetrafluoroethylene, carbon graphite can be anti-corrosion, and it is generally preferred in chemical sites. . The square of the life velocity of the bearing is inversely proportional, so the best velocity is 1/3 of the maximum velocity. (3) The induction probe detects the movement of the rotating body and converts it into a pulse digital electrical signal. The output value of the electromagnetic coil voltage is close to a sinusoidal curve. The frequency range of the pulse signal changes linearly with the measured flow rate, and the typical range is 10 :1, 25:1 and 100:1 three specifications. The resistance of the electromagnetic coil is generally less than 2000Ω, more than this value may be damaged. 3. Installation of turbine flowmeter (1) The power line of the transmitter adopts metal shielded line, and the grounding should be good and reliable. The power supply is DC 24V, 650Ωimpedance. (2) The transmitter should be installed horizontally, avoid vertical installation, and ensure that there are suitable straight pipe sections before and after it, generally 10D in the front and 5D in the rear. (3) Ensure that the flow direction of the fluid is consistent with the direction of the arrow on the instrument shell, and must not be installed in reverse. (4) The measured medium must not corrode the turbine, especially the bearing, otherwise measures should be taken. (5) Be careful not to collide with the magnetic induction part. 4. The calibration method of the configuration and calibration standard of the turbine flowmeter is the ten-point water calibration method, but the calibration values ​​of different viscosities are different, so the viscosity calibration curve is usually required. 5. The display instrument of the turbine flowmeter The task of the display instrument is to convert the number of output pulses per unit time and the total number of output pulses into instantaneous flow and total flow, and display them. The pulse signal output by the preamplifier has irregular amplitude and waveform. After entering the display instrument, it needs to be shaped into a regular rectangular electric pulse signal with a certain amplitude by a shaping circuit, and then passed through the frequency/ The current conversion circuit converts the frequency signal into the corresponding current signal (4-20mA) and then converts the instantaneous flow value. The total amount is obtained by the conversion and accumulation circuit. Some display instruments are displayed locally, and some are sent to DCS for display. 6. Precautions (1) Before installing the turbine flowmeter, the pipeline should be cleaned. When the measured medium is not clean, a filter should be added. Otherwise, the turbine and bearings are easily stuck, and the flow cannot be measured. (2) When disassembling the flowmeter, do not collide with the magnetic induction part. (3) Set the instrument coefficient before putting into operation. Check carefully to make sure that the wiring of the instrument is correct and the grounding is good before power transmission. (4) When installing the turbine flowmeter, the front and rear pipeline flanges should be horizontal, otherwise the pipeline stress will have a great influence on the flowmeter. 7. Development prospects With the continuous development of science, today's turbine transmitter has developed into a miniaturized and highly integrated module, designed with powerful functional software, and equipped with RS232 standard computer communication interface, which provides maintenance and repair. convenient. It can be connected and communicated with DCS. DCS replaces the display instrument. For example, HOFFER flowmeter is more convenient and practical in the industrial production process. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Application of Turbine Flow Meter in Paper Flow Measurement'

Beijing Sincerity Automatic Equipment Co., Ltd has a professional team of engineers and technology professionals.

Super quality are in offer at Sincerity Flow Meter, welcome to visit us.

By building an connection around Sincerity and catering specifically to the craft beer crowd, Beijing Sincerity Automatic Equipment Co., Ltd was able to raise the capital and brand awareness needed to successfully break into the domestic market with a groundswell of support.