Abstract: The sound wave principle information of ultrasonic flow meter is provided to you by excellent flow meter and flow meter manufacturers. Waves are classified into two categories according to their properties: electromagnetic waves and mechanical waves. Electromagnetic waves are generated due to the action of electromagnetic force, and are the propagation process of electromagnetic field changes in space. Electromagnetic waves can be divided into radio waves, infrared, visible light, ultraviolet light, X-rays, etc. by frequency. machine. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on the principle of ultrasonic flowmeters. Waves are classified into two categories according to their properties: electromagnetic waves and mechanical waves. Electromagnetic waves are generated due to the action of electromagnetic force, and are the propagation process of electromagnetic field changes in space. Electromagnetic waves can be divided into radio waves, infrared, visible light, ultraviolet light, X-rays, etc. by frequency. Mechanical wave is the propagation of mechanical waves in the medium due to mechanical force. It propagates mechanical energy and can only propagate in the medium. Sound wave is a kind of mechanical wave, which is divided into infrasound wave, audible sound wave and ultrasonic wave according to the frequency. Waves with frequencies below 20Hz are infrasound waves; waves with frequencies between 20 and 20,000Hz are audible sound waves; waves with frequencies above 20kHz are called ultrasonic waves. Ultrasound is a mechanical vibration wave with a frequency above 20kHz. It has good directivity, concentrated energy, and large penetration ability. It can penetrate several meters of steel plates with little energy consumption. When encountering the interface between two media, it can Produces obvious reflection and refraction phenomenon. The ultrasonic wave has a certain decay phenomenon in the process of propagation, which is caused by the absorption of the energy of the ultrasonic wave by the medium. Ultrasound decays faster in the air, especially when the frequency is high, so ultrasonic waves with a lower frequency are used when propagating in the air, generally at tens of kHz (40kHz), while the attenuation is slower in liquids and solids. Propagation is farther, so higher frequencies can be used, typically a few hundred kHz or more. Ultrasonic sensors have a wide range of applications and can be used to measure flow (ultrasonic flowmeter), liquid level (ultrasonic level gauge), material level (ultrasonic level gauge), material thickness and anti-theft alarm. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'The principle of ultrasonic flow meter sound wave'
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Abstract: The working principle information of steam flow meter is provided to you by excellent flow meter and flow meter manufacturers. Working principle of steam flowmeter There are currently two types of steam flowmeters used in the domestic market. One is electronic and the other is mechanical. Mechanical products are obsolete products with poor accuracy and low temperature resistance. Just to explain it to everyone. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on the working principle of steam flowmeters. Working principle of steam flowmeter There are currently two types of steam flowmeters used in the domestic market. One is electronic and the other is mechanical. Mechanical products are obsolete products with poor accuracy and low temperature resistance. Just to explain to you, the working principle of AK-LUGB intelligent steam flowmeter, if a bluff vortex generator (bluff body) is set in the fluid, two regular vortexes will be generated alternately from both sides of the vortex generator. This kind of vortex is called Karman vortex, as shown in Figure (1). Figure (1) Alternating and regular vortex columns are formed downstream of the vortex generator. Suppose the frequency of vortex generation is f, the average velocity of incoming flow of the measured medium is V, and the width of the vortex generating body is d. According to the principle of Karman vortex street, there is the following relationship: f=StV/d Formula (1) In the formula: f- the frequency of the Karman vortex generated on the side of the generating body HZ St- Strouhal number (dimensionless number) V- the average flow velocity of the fluid (m/s) d- The width of the vortex generating body (m) is given by It can be seen that the instantaneous flow rate can be calculated by measuring the Kalman vortex separation frequency. Among them, the Strouhal number (St) is a dimensionless unknown, and Figure (2) shows the relationship between the Strouhal number (St) and the Reynolds number (Re). Figure (2) In the straight part of the curve table with St=0.17, the release frequency of the vortex is proportional to the flow velocity, which is the measurement range of the vortex flow sensor. As long as the frequency f is detected, the flow velocity of the fluid in the pipe can be obtained, and the volume flow rate can be obtained from the flow velocity V. The ratio of the measured pulse number to the volume is called the instrument constant (K), see formula (2) K=3600f/Q (1/m³) In formula (2): K = instrument constant (m-3). f = number of pulses Q = volume flow (m³) So it seems that everyone knows the working principle of this steam flowmeter. In the process of purchasing in the future, we can better help you choose the model. The steam flowmeter AK-LUGB is of excellent quality and high precision. Won the reputation of market consumers. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'The working principle of steam flow meter'
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Abstract: The application information of Verabar flowmeter in oxygen measurement is provided by excellent flowmeter and flowmeter manufacturers. In the main oxygen supply process of industrial production, the oxygen transmission pipeline must be equipped with a corresponding flow measurement system. Due to economical accounting and charging fees, the measurement accuracy of oxygen flow has attracted more and more attention. In the past, most of the orifice plates were used to measure the oxygen flow. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the application article details of Verabar flowmeters in oxygen measurement. In the main oxygen supply process of industrial production, the oxygen transmission pipeline must be equipped with a corresponding flow measurement system. Due to economical accounting and charging fees, the measurement accuracy of oxygen flow has attracted more and more attention. In the past, most of the orifice plates were used to measure the oxygen flow, and appropriate intelligent flow meters were used to automatically compensate and correct errors caused by changes in oxygen pressure and temperature, so as to improve the measurement accuracy. The orifice plate has a simple structure, is widely adaptable to fluids and has been standardized, but in practical applications, errors that are difficult to estimate sometimes occur, and the key lies in the primary detection part. As we all know, the traditional orifice plate throttling device has insurmountable shortcomings: the range ratio is too small, usually only 3:1, so that the large and upper flow cannot be taken into account, and the small flow is often not measured, resulting in a large error in the cumulative flow value; Secondly, the pressure loss of the orifice plate throttling device is large, which is not conducive to energy saving, and the construction volume is large and the installation cost is high. 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 Verabar Flow Meter in Oxygen Measurement'
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Flow measurement characteristics and requirements of the oil storage and transportation industry The oil storage and transportation industry is also a major user of flow meters. Every year, hundreds of millions of tons of refined oil are measured from the oil depot and then transferred to the gas station or the next-level oil depot, and then measured. sent to end users. Tens of thousands of gas stations are all over the place, and each gas station is equipped with various fuel dispensers. Refined oil mainly includes gasoline, diesel, kerosene, lubricating oil, aviation gasoline and other varieties. Since the tank trucks, tank ships or vehicle tanks receiving oil products are all installed on movable equipment, the oil products are sent to the receiver through flexible pipes such as crane tubes and flexible tubes after being measured by flow meters. Because oil products are flammable and explosive substances, safety is the primary concern of people. Since the high-speed flowing oil rubs against the pipe fittings and the inner wall of the pipeline, it is easy to generate static electricity. Therefore, static grounding measures should be taken in the pipeline design to guide the generated static electricity into the ground. The static grounding system is also required to be interlocked with the oil distribution control system, once the static grounding is lost, the oil distribution will be stopped immediately. In addition, the flow measurement of the oil storage and transportation industry has the following characteristics and requirements.
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The gas mass flowmeter system was successfully put into operation on November 10, 2011. Under the condition of full-load production, the technical development department organized relevant personnel to conduct a comprehensive assessment of the liquid ammonia metering system from 0:00 on December 8 to 24:00 on December 16. The nine-day average ammonia production meter was 193.11t, the daily average ammonia consumption meter (the sum of FIQ-103 and FIQ-101 meters) was 188.30t, and the daily average ammonia stock was withdrawn (increased) by 4.82t (193.11－188.30=4.82 ), while the actual ammonia inventory was lifted 5.37t on average on the 9th day (this data is obtained by converting the height of the level gauge of the liquid ammonia storage tank. In the accumulation of long-term experience, the conversion method of the height of the liquid level gauge is basically reliable). Because the ammonia metering system is a closed system, and there is no way to use an instrument with a higher accuracy than the T-type flowmeter (dynamic ±0.2%) to individually test the metering accuracy of the flowmeter one by one. Therefore, the above comparison method had to be adopted. In contrast, the daily average liquid ammonia inventory meter data is smaller than the liquid level meter converted data. This shows that there are still problems in the liquid ammonia metering system: there is a bypass pipeline in the liquid ammonia production meter pipeline. It can be seen from the scene that there is a slight internal leakage in the bypass, and the liquid ammonia that leaks in the internal leakage is not measured by the meter. Therefore, it is credible that the daily average meter inventory is slightly smaller than the calculated amount of the liquid level gauge. After 9 days of actual assessment, the members of the assessment team agreed that the liquid ammonia metering system was running stably, and the mass flowmeter detection was accurate and reliable, which was in line with the actual production situation. On December 17, 2011, liquid ammonia measurement was officially included in the company's target cost assessment with meter data. So far, the liquid gas mass flowmeter has been put into operation for nearly 9 months, and the flowmeter has never had any failure. As a matter of fact, the ammonia meter used by Sokali was put into operation as early as the middle of May 1997, and it was also the first time we used a mass flow meter. It has been in use for nearly 6 years since it was put into operation in mid-May, 1997. The measurement is very accurate and no failure has occurred. Therefore, when the liquid ammonia metering system was perfected in 2001, two mass flowmeters were put into operation and it was also very successful. The above practice shows that it is correct to choose gas mass flowmeter for liquid ammonia measurement, and the system scheme is reasonable and feasible. The commissioning of the liquid ammonia metering system ended decades of history in which liquid ammonia production was measured by glass level gauges in liquid ammonia storage tanks. The conflicts and disputes caused by the apportionment of liquid ammonia measurement also reduced the workload and maintenance of the instrument, which was well received by all the cadres and employees of the company. The improvement of the liquid ammonia metering system has improved the scientific management level of the company.
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