Ultrasonic flow meter plays a great role in water metering in metallurgical enterprises

Abstract: Ultrasonic flow meter plays a great role in water metering in metallurgical enterprises. Information is provided by excellent flow meter and flow meter manufacturers and quotation manufacturers. Jiangsu Jinyuan Instrument Engineering Co., Ltd., as a manufacturer of high-quality flowmeters of Jiangsu brands, main products: electromagnetic flowmeters, ultrasonic flowmeters, orifice flowmeters, sewage flowmeters, open channel flowmeters, V-cone flowmeters, gasoline flowmeters, etc. , Our factory specializes in manufacturing. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details of ultrasonic flowmeters in water measurement in metallurgical enterprises. As a manufacturer of high-quality flow meters, Jinyuan Instrument Engineering Co., Ltd. main products: electromagnetic flowmeters, ultrasonic flowmeters, orifice flowmeters, sewage flowmeters, open channel flowmeters, V-cone flowmeters, gasoline flowmeters, etc. Our factory specializes in Manufacture of flow instruments, pressure instruments, temperature instruments, liquid level instruments, calibration instruments, instrument electrical cabinets, wires and cables and other instruments. Welcome new and old customers to consult and purchase, we will serve you sincerely! Metallurgical enterprises are continuous and comprehensive operations, and they are not only large energy consumers but also large fresh water consumers. Water is a special resource on the earth, especially fresh water is a scarce resource, and the ton water cost of groundwater increases significantly year by year. Water saving is not only an economic issue for enterprises, but also a major social issue related to the sustainable development of enterprises and the harmonious development of society and people's livelihood. Measurement is the technical support for the measurement of water-saving performance of enterprises, and it has an irreplaceable display and guidance role for enterprises to rationally control water use. The support of measurement technology plays a fundamental role in realizing enterprise information management. Most of the water metering in the enterprise uses mechanical water meters, which has the following defects: (1) low precision, large positive and negative deviation; (2) easy to damage; (3) inconvenient calibration or calibration; (4) water pressure loss due to pipe diameter reduction ; ⑸ can not display real-time traffic; ⑹ especially the measurement data can not be transmitted remotely through the network, can not meet the needs of enterprise informatization. After reviewing the data of industrial liquid flow meters and comparing them with physical objects, most of the technicians turned to ultrasonic flow meters for water measurement in combination with the needs of enterprise informatization construction. It is understood that the measurement offices of large metallurgical enterprise groups such as Laiwu Iron and Steel and Jinan Iron and Steel have gradually adopted ultrasonic flowmeters for water measurement between the head office and the iron-making plant, steel-making plant, rolling mills, and power plants, and tried to use portable water meters to measure water. Comparison. First, the measurement principle of ultrasonic flowmeter Ultrasonic flowmeter is a non-contact flowmeter. The working principle is: when the ultrasonic wave propagates in the fluid, its propagation speed is affected by the fluid velocity. By measuring the propagation velocity of the ultrasonic wave in the fluid, the fluid velocity can be detected and the flow rate can be converted. Taking the most widely used time difference ultrasonic flowmeter as an example, when the ultrasonic wave propagates in the fluid, the propagation speed of the ultrasonic wave in the downstream direction will increase, and the upstream direction will decrease, that is, the same propagation distance has different propagation times. The relationship between the difference of the propagation velocity and the flow velocity of the fluid to be measured is obtained by calculating the flow velocity and converting the flow rate. That is, when the ultrasonic beam is in the flow direction of the water medium in the pipe,“upstream sensor”and“Downflow sensor”When propagating between, the flow of water will cause a small change in the propagation time of the ultrasonic beam relative to the static propagation, and the change in the propagation time is proportional to the flow rate of the water, which is the measurement principle of the transit-time ultrasonic flowmeter. The theoretical expression of its relationship is as follows: V=MD/sin2θ×△T/TupTdown Among them, M—is the number of straight-line propagation of the ultrasonic beam in the waterθ—is the angle between the ultrasonic beam and the water flow direction Tup—is the propagation time of the ultrasonic beam in the positive direction (the propagation time from the upstream sensor to the downstream sensor) Tdown—It is the propagation time of the ultrasonic beam in the reverse direction (the propagation time from the downstream sensor to the upstream sensor) △T=Tup-Tdown 2. Characteristics of ultrasonic flowmeters Ultrasonic flowmeters are based on microprocessing technology, and most of them use integrated circuits and low voltage designed for wide-pulse emission technology. In measurement technology, in order to achieve higher resolution and larger measurement range, 0.1ns ultra-high-resolution time measurement circuits are often used. It is specially used for liquid medium measurement especially water measurement. Its salient features are: the accuracy level is±1.0%, it can be installed under pressure without production. The host can be installed in the value control room and can also output standard signals such as current and pulse, and can use RS232 or RS485 interface communication for remote transmission of measurement data. In addition, the flowmeter has the advantages of high reliability, low power consumption, anti-interference, convenient installation and maintenance. 3. Structure and installation of ultrasonic flowmeter 1. Structure of ultrasonic flowmeter Ultrasonic flowmeter can generally be divided into three parts: field sensor (ie probe), transmission cable, and display host. Its sensors include clamp type, plug-in type, flange type (ie pipe section type), and the display host is divided into fixed type and portable type, and the portable host can be equipped with clamp type sensor to compare the ultrasonic flowmeter running fixed online (on-site calibration). ) and the installation is very simple (about 10 minutes).

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