Wafangdian Vortex Flow Meter Inspection Certificate, Application of Liquid Vortex Flow Meter

Description :

Qingdao Hesheng Zhiyuan Automation System Co., LtdVortex flowmeter inspection certificatePrecautions for selection:

　　1. The diameter of the digital vortex flowmeter should be selected according to the flow rate, and the medium flow rate must be within the flow range, otherwise it cannot work. The flow rate is 30% -80%;

　　2. If the actual pipeline diameter is larger or smaller than the selected instrument diameter, shrink tubing or expansion tubing should be used to reduce the diameter to ensure the normal use of the instrument;

　　3. The seismic integrated vortex flowmeter selects the corresponding temperature flowmeter based on the temperature of the measured medium; Choose whether the flowmeter is explosion-proof according to the requirements of the measured medium and environment;

　　4. The vortex flowmeter has certain requirements for the front and rear straight pipe sections, generally 25 times the DN before and 5 times the DN after. Specific requirements can be found in the instruction manual;

　　5. Softened water vortex flowmeter liquid generally does not have temperature and pressure compensation. Saturated steam should have temperature or pressure compensation, while gas and superheated steam should have both temperature and pressure compensation.

　　6Wafangdian Vortex Flow Meter Inspection Certificate, Application of Liquid Vortex Flow MeterThe regulating valve should be installed 5D downstream of the sensor. If it must be installed upstream of the sensor, the upstream straight pipe section of the sensor should not be less than 50D, and the downstream should not be less than 5D. If the upstream of the sensor installation point is 90. For elbows or T-shaped joints, the upstream straight pipe section should be ≥ 20D, and the downstream straight pipe section should be ≥ 5D. Vortex flow meters should be avoided from being installed on pipelines with strong vibration as much as possible. If installation is necessary, pipeline fastening devices must be installed at 2D upstream and downstream locations, and anti vibration pads must be added to enhance the anti vibration effect. The inner diameters of the upstream and downstream piping should be the same. If there is a difference, the inner diameter Dp of the piping and the inner diameter Db of the vortex street instrument body should meet the following relationship: 0.98Db ≤ Dp ≤ 1.05Db. The upstream and downstream piping should be concentric with the inner diameter of the flow instrument body, and the different axial degrees between them should be less than 0.05Db. For ease of use, the battery powered local display vortex street flowmeter adopts low-power high-tech, and can operate continuously for more than a year using lithium battery power supply, saving the procurement and installation costs of cables and display instruments. It can display instantaneous flow, cumulative flow, etc. on site

　　Qingdao HeshengWafangdian Vortex Flow Meter Inspection Certificate, Application of Liquid Vortex Flow MeterFeatures: 1. Digital vortex flowmeter: The digital vortex flowmeter is equipped with DSP signal processing circuit and anti vibration algorithm, and is equipped with mature piezoelectric crystal sensors. After long-term on-site testing and operation, its performance is reliable. Even under complex operating conditions, digital vortex flowmeters can effectively identify the vortex signals generated by the body and achieve stable operation. 2. Anti vibration performance: Starting from the conductive part of the sensor, vibration is avoided. The electric plate part uses Fourier transform and seismic algorithm to effectively identify normal vortex flow signals and filter the identified signals. Large pipeline vibrations and abnormal flow conditions can achieve anti vibration performance and measurement. 3. Spectrum analysis: Possess DSP spectrum signal analysis capability, able to analyze the fluid signal generated in the digital vortex flowmeter, and automatically select the operating condition based on dynamic data and self provided database comparison. 4. The flow output signal of the ultra wide range control sensor probe is guaranteed by the DSP to capture the vortex signal in the low flow area, thereby significantly improving the stability of the measurement and expanding the range ratio of the flowmeter, which can reach up to 1:80. 5. High precision measuring machine tool precision machining of vortex street shell and vortex generator, combined with digital vortex street board, gas measurement accuracy can reach up to 0.75%. 6. The dry calibration technology of vortex flowmeter without fear of vibration has received attention from various aspects. Since the early 1980s, some domestic experts and scholars have realized the possibility of dry calibration of vortex flowmeters after analyzing their characteristics. They can display various information such as instantaneous flow rate, instantaneous heat, cumulative flow rate, cumulative heat, vortex frequency, medium pressure and temperature, density, time and date, and also have rich functions such as small flow automatic compensation, power outage flow compensation, and automatic meter reading

　　Wafangdian Vortex Flow Meter Inspection Certificate, Liquid Vortex Flow Meter Usage Product Technical Features:

　　When measuring volumetric flow rate with a vortex flowmeter, no compensation is required. The signal output by the vortex flowmeter is actually linearly related to the flow rate, that is, directly proportional to the volumetric flow rate. The purpose of pressure and temperature compensation is to obtain the density of the fluid, which is multiplied by the volumetric flow rate to obtain the mass flow rate. If measuring the volumetric flow rate of a gas, compensation is not required.

　　Wafangdian vortex flowmeter inspection certificate, liquid vortex flowmeter has small pressure loss, wide application range, and can measure steam, gas, and liquid flow rates

　　Using a DN50 vortex flowmeter to measure the flow rate of combustible gases, if the large flow rate Qmax in the pipeline is 200m3/h, the pressure loss of the sensor is: △ P=1.08 × 10-6 ρ v2 (kPa)=0.605 KPa

　　Within a certain Reynolds number range, the flow characteristics are not affected by fluid pressure, temperature, viscosity, density, or composition, but only by the shape and size of the vortex generator.

　　By 1950, digital flange type vortex flowmeters had been successfully developed in China, including thermal sensitive (including hot wire detection method and thermistor detection method) and ultrasonic vortex flowmeters. Two years later, stress type vortex flowmeters were successively launched, followed by strain type and vibration type vortex flowmeters to avoid high humidity and strong corrosive gas environments. If installation is necessary, ventilation measures must be taken

Vortex flowmeter inspection certificateIt is a new type of flowmeter for measuring fluid flow in closed pipelines based on the Karman vortex principle. The digital anti vibration vortex flowmeter has good medium adaptability and can directly measure the working condition volume flow of steam, air, gas, water, and liquid without temperature and pressure compensation. Equipped with temperature and pressure sensors, it can measure standard condition volume flow and mass flow, and is an alternative product to throttling flowmeters.Measuring compressed air flow meterThe output frequency signal is not affected by fluid properties and composition changes, that is, the instrument coefficient is only related to the shape and size of the vortex generator and pipeline within a certain Reynolds number range. But asPrepaid vortex flowmeterIn material balance and energy measurement, it is necessary to detect mass flow rate. At this time, the output signal of the flowmeter should simultaneously monitor volume flow rate and fluid density. Fluid properties and components still have a direct impact on flow measurement. The frequency signal output of the Jinan flowmeter is transmitted between the flowmeter and other equipment using a three wire system, with a power supply of 24VDC ± 10% (or 12VDC). The small load resistance of the output circuit is 10K Ω, and the large capacitor is 0.2UF. In the 1980s, the development of vortex flowmeters remained strong, with new products continuing to be introduced and old products constantly improving and enhancing. Fishermont Gong 1 Island Company has developed a dual body stress vortex flowmeter; (Germany) E+H Company and the company have successfully developed vortex street flowmeters using piezoelectric detection technology, including plug-in and rear mounted detection components. Adequate space should be left around the instrument installation point for installation, wiring, and regular maintenance. The flowmeter can be installed in a vertical pipeline for gas measurement, with no flow restrictions. If the measured gas contains a small amount of liquid, the gas flow rate should be from bottom to top. When measuring the flow direction of a liquid, it should be from bottom to top. Precautions for installing a vortex flowmeter include: 1. The installation of the flowmeter must be carried out according to requirements to avoid damage to the instrument and affecting the measurement accuracy due to improper installation. 2. The flowmeter should be avoided as much as possible from being installed on long overhead pipelines, as the sagging of the pipeline can easily cause sealing leakage between the flowmeter and the flange If installation is necessary, pipeline support points must be set up at 2D positions upstream and downstream of the flowmeter

　　Qingdao Hesheng Zhiyuan Automation System Co., Ltd

　　189 Hui Xin 5483 Same number 1481

　　Q：3438-5007-67

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