Application of TRD-LDG Intelligent Electromagnetic Flowmeter in Water Supply Industry
2021-07-15 15:03:08
TRD-LDG intelligent electromagnetic flowmeter is a high-intelligence, high-reliability flowmeter developed with international advanced technology. It can be used not only for general process inspection, but also for the measurement of pulp, pulp and pasty liquids. It is widely used. In the petroleum, chemical, steel, food, electricity, paper, water supply and drainage, water resources, water resources and other industries.
TRD-LDG intelligent electromagnetic flowmeter is a high-intelligence, high-reliability flowmeter developed with international advanced technology. It can be used not only for general process inspection, but also for the measurement of pulp, pulp and pasty liquids. It is widely used. In the petroleum, chemical, steel, food, electricity, paper, water supply and drainage, water resources, water resources and other industries.
When choosing a flow meter, a water plant should pay attention to the following aspects: The first pipeline has a large diameter and requires a smaller pressure loss as much as possible. Generally, it is not allowed to increase the flow rate by the method of local reduction; the second newly designed pipeline is generally chosen to have an economic flow rate. Because the flow rate is too low, it will inevitably increase the investment in the pipeline. If the flow rate is too high, it will cause a significant increase in power loss, leading to an increase in operating costs. This is uneconomical. However, in some old pipelines, the flow rate is increased due to the need for increased production. Third, due to the low flow rate, dirt, silt, etc. in the fluid are easily deposited on the inner wall of the pipeline. When designing the system, the contact between the instrument and the fluid should be considered; the fourth measurement range requires a large degree. The flow rates of some water pipes at night and during daytime, winter and summer are very different, as much as 10 to 20 times. Some users use water and they are simply stopped at certain seasons. Therefore, these water flowmeters require a particularly large range; High degree of protection. Most of the large-diameter pipelines are laid underground so as to save space. In the north, it is also necessary for anti-freezing. Therefore, most of the flow sensors are installed in the pipe section in the well. Because rainwater, wellbore leakage, and outflow of pipelines often cause the water level in the well to flood the flow sensor, this situation should be estimated during design. Use a flow sensor that prevents continuous flooding, such as the IP68 protection rating. Water sources and water flow meters for water plants mainly use a variety of flow meters based on electromagnetic flow meters. Water companies throughout the country have used electromagnetic and ultrasonic flow meters in large numbers, and a few have used plug-in flow meters (turbine flow meters and electromagnetic flow meters, etc.), and they have been extensively updated as intelligent, high-precision, and multi-functional flow meters. A few water companies have implemented or partially applied wired/bus digital communication methods (such as MODBUS, PROFBUS, PP, CAN, etc.) and wireless communication methods to realize remote meter reading and remotely transmit traffic data to the company's central dispatch office. .
Electromagnetic flowmeters are electromagnetic flowmeters based on the principle of electromagnetic induction. The most commonly used flowmeters for water flow measurement at the source and outlet of a water plant are the following features.
1. No moving parts, high reliability, good long-term stability;
2, no additional resistance. This point has special significance for large diameter flowmeters;
3, the measurement accuracy is high. Typical product at 1m/s, the accuracy can reach ± ​​0.3% R;
4, a large range. The range of accuracy is generally as high as 40:1, and the measurable range is as high as 200:1. For example, in the IFM series, when v = 0.06m/s, the basic error can still be less than ±2%R;
5, straight pipe requirements relatively low. This is also important for large diameter pipelines. A variety of flowmeters require that the straight tube reach 30D before and after, and for a tube with a diameter of 1m or more, it means that it must have a straight tube section of 30m or more, which is difficult to satisfy in most cases;
6, a large diameter product. The largest domestic product offering DN3000, which can meet the needs of large-caliber water flow measurement;
7, the full range. Anti-immersion water type IP68 products;
8. The inadequacies are that the prices of large-caliber products are high, and the greater the caliber, the faster the prices increase.
Electromagnetic flowmeter has become a flow meter with faster development and more mature technology, and has become the preferred flowmeter for water flow measurement at the inlet and outlet of water sources and water plants. With the rapid development of computer technology and microelectronics technology, the design and manufacturing technology of electromagnetic flowmeters have also achieved rapid development. The sensor manufacturing process adopts a variety of lining processes (tetrafluoroplastics, F4, rubber, ceramic lining, etc.) suitable for various occasions, and optimization and improvement in the excitation coil structure and housing protection, large-diameter electromagnetic flow sensor basically meet IP68, reliability further improved. The electromagnetic flow converter intelligentization technology is further improved and improved. With the help of the microcontroller microprocessor, DSP technology and software programming technology, the electromagnetic flowmeter excitation method is optimized and intelligentized (multi-frequency excitation, dual-frequency excitation, etc.) and realized. Broaden the range (measurement range 50:1, then consider the upper limit range 20:1, the two can be multiplied to 1000:1), compensation measurement error, zero correction, excitation and system self-diagnosis, positive and negative flow judgment, The self-diagnosis and other functions of the empty pipe and the dissatisfaction pipe greatly enhance the technical measurement function of the electromagnetic flowmeter and improve the reliability and stability. In order to meet the requirements of FCS's new control system, the new electromagnetic flowmeter uses computer serial communication technology. It is used in field bus digital communication protocols such as PROFBUS and FP to realize two-way digital communication with the host computer and improve the automation level of the system. The reliability of data transmission.
TRD-LDG intelligent electromagnetic flowmeter is a high-intelligence, high-reliability flowmeter developed with international advanced technology. It can be used not only for general process inspection, but also for the measurement of pulp, pulp and pasty liquids. It is widely used. In the petroleum, chemical, steel, food, electricity, paper, water supply and drainage, water resources, water resources and other industries.
When choosing a flow meter, a water plant should pay attention to the following aspects: The first pipeline has a large diameter and requires a smaller pressure loss as much as possible. Generally, it is not allowed to increase the flow rate by the method of local reduction; the second newly designed pipeline is generally chosen to have an economic flow rate. Because the flow rate is too low, it will inevitably increase the investment in the pipeline. If the flow rate is too high, it will cause a significant increase in power loss, leading to an increase in operating costs. This is uneconomical. However, in some old pipelines, the flow rate is increased due to the need for increased production. Third, due to the low flow rate, dirt, silt, etc. in the fluid are easily deposited on the inner wall of the pipeline. When designing the system, the contact between the instrument and the fluid should be considered; the fourth measurement range requires a large degree. The flow rates of some water pipes at night and during daytime, winter and summer are very different, as much as 10 to 20 times. Some users use water and they are simply stopped at certain seasons. Therefore, these water flowmeters require a particularly large range; High degree of protection. Most of the large-diameter pipelines are laid underground so as to save space. In the north, it is also necessary for anti-freezing. Therefore, most of the flow sensors are installed in the pipe section in the well. Because rainwater, wellbore leakage, and outflow of pipelines often cause the water level in the well to flood the flow sensor, this situation should be estimated during design. Use a flow sensor that prevents continuous flooding, such as the IP68 protection rating. Water sources and water flow meters for water plants mainly use a variety of flow meters based on electromagnetic flow meters. Water companies throughout the country have used electromagnetic and ultrasonic flow meters in large numbers, and a few have used plug-in flow meters (turbine flow meters and electromagnetic flow meters, etc.), and they have been extensively updated as intelligent, high-precision, and multi-functional flow meters. A few water companies have implemented or partially applied wired/bus digital communication methods (such as MODBUS, PROFBUS, PP, CAN, etc.) and wireless communication methods to realize remote meter reading and remotely transmit traffic data to the company's central dispatch office. .
Electromagnetic flowmeters are electromagnetic flowmeters based on the principle of electromagnetic induction. The most commonly used flowmeters for water flow measurement at the source and outlet of a water plant are the following features.
1. No moving parts, high reliability, good long-term stability;
2, no additional resistance. This point has special significance for large diameter flowmeters;
3, the measurement accuracy is high. Typical product at 1m/s, the accuracy can reach ± ​​0.3% R;
4, a large range. The range of accuracy is generally as high as 40:1, and the measurable range is as high as 200:1. For example, in the IFM series, when v = 0.06m/s, the basic error can still be less than ±2%R;
5, straight pipe requirements relatively low. This is also important for large diameter pipelines. A variety of flowmeters require that the straight tube reach 30D before and after, and for a tube with a diameter of 1m or more, it means that it must have a straight tube section of 30m or more, which is difficult to satisfy in most cases;
6, a large diameter product. The largest domestic product offering DN3000, which can meet the needs of large-caliber water flow measurement;
7, the full range. Anti-immersion water type IP68 products;
8. The inadequacies are that the prices of large-caliber products are high, and the greater the caliber, the faster the prices increase.
Electromagnetic flowmeter has become a flow meter with faster development and more mature technology, and has become the preferred flowmeter for water flow measurement at the inlet and outlet of water sources and water plants. With the rapid development of computer technology and microelectronics technology, the design and manufacturing technology of electromagnetic flowmeters have also achieved rapid development. The sensor manufacturing process adopts a variety of lining processes (tetrafluoroplastics, F4, rubber, ceramic lining, etc.) suitable for various occasions, and optimization and improvement in the excitation coil structure and housing protection, large-diameter electromagnetic flow sensor basically meet IP68, reliability further improved. The electromagnetic flow converter intelligentization technology is further improved and improved. With the help of the microcontroller microprocessor, DSP technology and software programming technology, the electromagnetic flowmeter excitation method is optimized and intelligentized (multi-frequency excitation, dual-frequency excitation, etc.) and realized. Broaden the range (measurement range 50:1, then consider the upper limit range 20:1, the two can be multiplied to 1000:1), compensation measurement error, zero correction, excitation and system self-diagnosis, positive and negative flow judgment, The self-diagnosis and other functions of the empty pipe and the dissatisfaction pipe greatly enhance the technical measurement function of the electromagnetic flowmeter and improve the reliability and stability. In order to meet the requirements of FCS's new control system, the new electromagnetic flowmeter uses computer serial communication technology. It is used in field bus digital communication protocols such as PROFBUS and FP to realize two-way digital communication with the host computer and improve the automation level of the system. The reliability of data transmission.
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