??新金沙线上娱乐??

Contact Us
Search Search

Technology for straight section of liquid turbine flowmeter in industrial application

Technology for straight section of liquid turbine flowmeter in industrial application

Liquid turbine flowmeter guarantees technical requirements for straight pipe sections in industrial applications

Liquid turbine flow meters use turbines for measurement. It first converts the flow rate to the speed of the turbine, and then converts the speed into an electrical signal that is proportional to the flow. This flow meter is used to detect the instantaneous flow and the total accumulated flow, and its output signal is frequency, which is easy to digitize. The induction coil is fixed on the housing together with the magnet. When a ferromagnetic turbine blade passes through a magnet, the magnetic resistance of the magnetic circuit changes, which generates an inductive signal. The signal is amplified and shaped by the amplifier and sent to the counter or frequency meter to display the total accumulated flow. At the same time, the pulse frequency is frequency-voltage converted to indicate the instantaneous flow. The speed of the impeller is proportional to the flow rate, and the number of revolutions of the impeller is proportional to the total flow. The output of the turbine flowmeter is a frequency-modulated signal, which not only improves the interference resistance of the detection circuit, but also simplifies the flow detection system. 精度在± 0.2%以内。 Its range ratio can reach 10: 1, and its accuracy is within ± 0.2% . 秒。 The time constant of the small-inertia and small-sized turbine flowmeter can reach 0.01 seconds. Liquid turbine flowmeters are widely used in petroleum, organic liquids, inorganic liquids, liquefied gas, natural gas, and cryogenic fluids. The output signal of the turbine flow meter is pulse, which is easy to digitize. Turbine flowmeters have low pressure loss, the blades are corrosion-resistant, and can measure viscous and corrosive media.

Liquid turbine flowmeter

  The liquid turbine flowmeter has many features such as simple structure, few processed parts, light weight, convenient maintenance, large circulation capacity, and adaptability to high parameters. It is mainly used to measure the flow of fluid substances. Flow and total volume of liquid. Liquid turbine flowmeters have been widely used in measurement control systems in petrochemical, metallurgical and scientific research fields. Products equipped with sanitary fittings can be used in the food and pharmaceutical industries. Dotter Instrument Technology Co., Ltd. is a company specializing in the production and manufacture of gas turbine liquid flowmeters. Over the years, technical personnel of the enterprise have accumulated a lot of success in improving the installation and commissioning of liquid turbine flowmeter meters in industrial pipeline control systems Certain technical experience provides practical experience for higher integration and automation of industrial pipeline control systems. This article is written to make recommendations for the material selection of liquid turbine flowmeters and the requirements for installing straight pipe sections.

  The installation method of liquid turbine flowmeter is generally flange type, and the flange can be used to connect the pipeline. Before installation, make sure that the pipeline purge and pressure test are completed. Through the application of the liquid turbine flowmeter in the industrial pipeline control system, the instrument selection, installation process adjustment, and testing are summarized.

  The intelligent turbine flowmeter is not sensitive to the upstream and downstream piping layout, and generally there is no requirement for the length of the upstream and downstream straight pipe sections. 认为流量测量不受旋转流和流速场剖面畸变影响。 International standard draft iso / dis 11451 considers that flow measurement is not affected by rotational flow and velocity field profile distortion. 却认为;上下游直管段长度可小至2d;在进口端置一金属(或塑料)网,可有效地改善流速分布畸变,得到分布均匀的气流;要防止从小管径突然扩大进入较大口径仪表,要缓慢过渡。 However, bs 7405 believes that the length of the upstream and downstream straight pipe sections can be as small as 2d; placing a metal ( or plastic ) mesh at the inlet end can effectively improve the distortion of the flow velocity distribution and obtain a uniformly distributed airflow ; it is necessary to prevent the sudden expansion from a small diameter For larger-caliber instruments, transition slowly. The front straight tube section of the intelligent turbine flowmeter, and the flow sensor with a measuring tube requires a certain length of the front straight tube section. This is not specifically specified, but according to the value recommended by the manufacturer. 的上游直管段和(3~5)d的下游直管段。 It is recommended that (8 ~ 10) d upstream straight pipe section and (3 ~ 5) d downstream straight pipe section be used for timing measurement with the inserted hot wire flow velocity in the pipeline. 若在其进口端装一块或二快多孔板式流动调整器后,则其长度可大为缩短,只有一组温度检测点的插入式智能型涡轮流量计与带测量管智能型涡轮流量计的上游直管段长度要求相近; The length of the upper straight pipe section required for the intelligent turbine flowmeter with measuring tube ; if one or two fast perforated plate flow regulators are installed at the inlet end, the length can be greatly shortened, and only a set of temperature detection points are inserted. The length requirement of the upstream straight pipe section of the intelligent turbine flowmeter with the intelligent turbine flowmeter with measuring tube is similar ;

Installation requirements for straight pipe sections

  直管段长度可缩短很多,通常制造厂会提供建议。 In summary, in order to ensure the measurement accuracy and service life of the intelligent turbine flowmeter, in industrial installation we must ensure the correct installation of the instrument and the requirements for the installation of straight pipe sections, such as when it uses multiple sets of detection points In the case of rods or multiple detection rods , the length of the straight pipe section can be shortened a lot, usually the manufacturer will provide recommendations.

七乐彩 欢乐拼三张 新金沙线上娱乐 欢乐拼三张