Anti vibration vortex flowmeter, seismic vortex flowmeter, 2-ton boiler steam flowmeter

Description :

Qingdao Hesheng CompanyAnti vibration vortex flowmeter, seismic vortex flowmeter, 2-ton boiler steam flowmeterTechnical Specifications:

　　Accuracy level 1.0; 1.5 level 0.5 level (liquid) output signal square wave: high level ≥ 6V, low level<1V; Standard current 4-20mA supply voltage+12VDC~24VDC resistance coefficient Cd ≤ 2.4 explosion-proof grade ExdIICT6 environmental conditions temperature -40~55 ℃, relative humidity 5%~90%, atmospheric pressure 86~106kPa flange standardization Ministry of Chemical Industry standard mechanical department standard electrical interface M20 * 1.5 internal thread (NPT thread needs to be customized)

　　Qingdao Hesheng Zhiyuan Automation System Co., LtdAnti vibration vortex flowmeterPrecautions for selection:

　　1. The diameter of the steam anti-seismic vortex flowmeter should be selected according to the flow rate. 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 anti-seismic clamping 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. Directly displaying 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.

　　6Anti vibration vortex flowmeter, seismic vortex flowmeter, 2-ton boiler steam flowmeterAfter major countries issued standards, the International Standardization Group began to develop international standards for vortex flowmeters and released them in the form of a draft standard in 1993. All of these indicate that the development, manufacturing, and application of vortex flowmeters have entered the era of standardization, which has made the components (especially vortex generators) highly versatile, truly ensuring that the repeatability and accuracy of the sensor will not be affected by component replacement; Capable of generating strong and stable vortex signals with minimal pressure loss; Easy to install, convenient to use and maintain; No compensation is required when measuring volumetric flow rate

　　Qingdao HeshengAnti vibration vortex flowmeterInstallation and usage instructions:

　　1. The installation of steam anti vibration vortex flowmeter should avoid the influence of strong electrical equipment, high-frequency equipment, strong switching power supply, high temperature, high humidity, and corrosive atmosphere.

　　2. When there is strong vibration in the pipeline, vibration reduction measures should be taken.Linyi flowmeterInstall anti vibration seats and add anti vibration pads at both upstream and downstream 2D locations.

　　3. Saturated steam flow meters can be installed horizontally, vertically, and obliquely; The medium must fill the pipeline and have a certain back pressure.

　　4. The process pipeline should be concentric with the flow meter; The inner diameter of the process pipeline should be consistent with the inner diameter of the flow meter, otherwise a contraction tube or expansion tube should be installed.

　　5. The sealing gasket of the temperature compensated vortex flowmeter cannot protrude into the pipeline, and the inner diameter of the sealing gasket can be 1-2mm larger than the inner diameter of the flowmeter.

　　6. If temperature and pressure compensation is required, the pressure tap should be located 3-5D downstream, and the temperature tap should be located 6-8D downstream.

　　7. The signal processing technology for anti vibration vortex flowmeter, seismic vortex flowmeter, and 2-ton boiler steam flowmeter is developing towards digitalization. The development from the application of conventional active filters to tracking filtering, adaptive filtering, and digital spectrum analysis has improved the accuracy, anti-interference ability, and measurement range of vortex flowmeters. Intelligent vortex flowmeters are stress type vortex flowmeters that measure flow based on the Karman vortex principle. They have a high signal-to-noise ratio, high sensitivity, and strong vibration resistance. With the improvement of product quality, standardization of design, selection, installation, and use, strengthening of pre-sales and after-sales services, and a decrease in on-site failure rates, user satisfaction has increased and confidence has been restored. Later, major instrument manufacturers in China also participated in this work. In the mid-1970s, Tianjin Industrial Automation Instrument Research Institute, Metallurgical Ministry Automation Research Institute, and other institutions successively invested in the research and development of vortex flowmeters. The entire 1950s was a period of strong development momentum for vortex flowmeters in China, and stress type vortex flowmeters became a hot topic, according to statistics from a conference in 1987; There are more than 20 enterprises engaged in the development and production of vortex flowmeters nationwide

　　Qingdao HeshengAnti vibration vortex flowmeterWorking Principle:

　　Vortex flowmeter is a type of fluid measurement that utilizes the Karman vortex phenomenon in fluid mechanics. The so-called Karman vortex street phenomenon refers to the formation of two alternating rows of vortices when the fluid passes through a vortex generator. Under certain conditions, asymmetric vortices can form stable vortex outputs. At this time, the frequency F of the vortex is mathematically related to the flow velocity V of the fluid and the width d of the generator as follows:

　　F=St? V/d St - Strouhal number. Under normal working conditions, it is a constant.

　　Anti vibration vortex flowmeter, seismic vortex flowmeter, and 2-ton boiler steam flowmeter should avoid high humidity and strong corrosive gas environments. If installation is necessary, ventilation measures must be taken. The mechanical vibration of the on-site pipeline for installing stress detection vortex flowmeter is quite strong, which affects the normal operation of the instrument. What are the countermeasures? In this situation, the installation orientation of the flowmeter can be adjusted to ensure that the instrument can work normally. According to relevant information, by early 2004, a new situation had emerged in the development and production of vortex street flowmeters in China. There were more than 200 production enterprises with an annual output of over 30000 units. When measuring volumetric flow rate, vortex street flowmeters do not require compensation. The signal output by the vortex street 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

　　Qingdao Hesheng Zhiyuan Automation System Co., Ltd

　　189 Hui Xin 5483 Same number 1481

　　Q：3438-5007-67

AfterSalesService :

• Anti vibration vortex flowmeter